root/drivers/char/istallion.c

/* */

DEFINITIONS

1. init_module
2. cleanup_module
3. stli_memalloc
4. stli_open
5. stli_close
6. stli_initopen
7. stli_rawopen
8. stli_rawclose
9. stli_cmdwait
10. stli_setport
11. stli_delay
12. stli_waitcarrier
13. stli_write
14. stli_putchar
15. stli_flushchars
16. stli_writeroom
17. stli_charsinbuffer
18. stli_getserial
19. stli_setserial
20. stli_ioctl
21. stli_settermios
22. stli_throttle
23. stli_unthrottle
24. stli_stop
25. stli_start
26. stli_dohangup
27. stli_hangup
28. stli_flushbuffer
29. stli_sendcmd
30. stli_read
31. stli_dodelaycmd
32. stli_hostcmd
33. stli_poll
34. stli_mkasyport
35. stli_mkasysigs
36. stli_mktiocm
37. stli_initports
38. stli_ecpinit
39. stli_ecpenable
40. stli_ecpdisable
41. stli_ecpgetmemptr
42. stli_ecpreset
43. stli_ecpintr
44. stli_ecpeiinit
45. stli_ecpeienable
46. stli_ecpeidisable
47. stli_ecpeigetmemptr
48. stli_ecpeireset
49. stli_ecpmcenable
50. stli_ecpmcdisable
51. stli_ecpmcgetmemptr
52. stli_ecpmcreset
53. stli_onbinit
54. stli_onbenable
55. stli_onbdisable
56. stli_onbgetmemptr
57. stli_onbreset
58. stli_onbeinit
59. stli_onbeenable
60. stli_onbedisable
61. stli_onbegetmemptr
62. stli_onbereset
63. stli_bbyinit
64. stli_bbygetmemptr
65. stli_bbyreset
66. stli_stalinit
67. stli_stalgetmemptr
68. stli_stalreset
69. stli_mapbrdmem
70. stli_initecp
71. stli_initonb
72. stli_startbrd
73. stli_brdinit
74. stli_eisamemprobe
75. stli_findeisabrds
76. stli_initbrds
77. stli_memread
78. stli_memwrite
79. stli_getbrdstats
80. stli_getport
81. stli_getportstats
82. stli_clrportstats
83. stli_memioctl
84. stli_init

   1 /*****************************************************************************/
   2 
   3 /*
   4  *      istallion.c  -- stallion intelligent multiport serial driver.
   5  *
   6  *      Copyright (C) 1994-1996  Greg Ungerer (gerg@stallion.oz.au).
   7  *
   8  *      This code is loosely based on the Linux serial driver, written by
   9  *      Linus Torvalds, Theodore T'so and others.
  10  *
  11  *      This program is free software; you can redistribute it and/or modify
  12  *      it under the terms of the GNU General Public License as published by
  13  *      the Free Software Foundation; either version 2 of the License, or
  14  *      (at your option) any later version.
  15  *
  16  *      This program is distributed in the hope that it will be useful,
  17  *      but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  *      GNU General Public License for more details.
  20  *
  21  *      You should have received a copy of the GNU General Public License
  22  *      along with this program; if not, write to the Free Software
  23  *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24  */
  25 
  26 /*****************************************************************************/
  27 
  28 #include <linux/module.h>
  29 #include <linux/errno.h>
  30 #include <linux/sched.h>
  31 #include <linux/timer.h>
  32 #include <linux/wait.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/termios.h>
  35 #include <linux/fcntl.h>
  36 #include <linux/tty_driver.h>
  37 #include <linux/tty.h>
  38 #include <linux/tty_flip.h>
  39 #include <linux/serial.h>
  40 #include <linux/cdk.h>
  41 #include <linux/comstats.h>
  42 #include <linux/string.h>
  43 #include <linux/malloc.h>
  44 #include <linux/ioport.h>
  45 #include <linux/delay.h>
  46 #include <asm/io.h>
  47 
  48 /*****************************************************************************/
  49 
  50 /*
  51  *      Define different board types. Not all of the following board types
  52  *      are supported by this driver. But I will use the standard "assigned"
  53  *      board numbers. Currently supported boards are abbreviated as:
  54  *      ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
  55  *      STAL = Stallion.
  56  */
  57 #define BRD_UNKNOWN     0
  58 #define BRD_STALLION    1
  59 #define BRD_BRUMBY4     2
  60 #define BRD_ONBOARD2    3
  61 #define BRD_ONBOARD     4
  62 #define BRD_BRUMBY8     5
  63 #define BRD_BRUMBY16    6
  64 #define BRD_ONBOARDE    7
  65 #define BRD_ONBOARD32   9
  66 #define BRD_ONBOARD2_32 10
  67 #define BRD_ONBOARDRS   11
  68 #define BRD_EASYIO      20
  69 #define BRD_ECH         21
  70 #define BRD_ECHMC       22
  71 #define BRD_ECP         23
  72 #define BRD_ECPE        24
  73 #define BRD_ECPMC       25
  74 #define BRD_ECHPCI      26
  75 
  76 #define BRD_BRUMBY      BRD_BRUMBY4
  77 
  78 /*
  79  *      Define a configuration structure to hold the board configuration.
  80  *      Need to set this up in the code (for now) with the boards that are
  81  *      to be configured into the system. This is what needs to be modified
  82  *      when adding/removing/modifying boards. Each line entry in the
  83  *      stli_brdconf[] array is a board. Each line contains io/irq/memory
  84  *      ranges for that board (as well as what type of board it is).
  85  *      Some examples:
  86  *              { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
  87  *      This line will configure an EasyConnection 8/64 at io address 2a0,
  88  *      and shared memory address of cc000. Multiple EasyConnection 8/64
  89  *      boards can share the same shared memory address space. No interrupt
  90  *      is required for this board type.
  91  *      Another example:
  92  *              { BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
  93  *      This line will configure an ONboard (ISA type) at io address 240,
  94  *      and shared memory address of d0000. Multiple ONboards can share
  95  *      the same shared memory address space. No interrupt required.
  96  *      Another example:
  97  *              { BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
  98  *      This line will configure a Brumby board (any number of ports!) at
  99  *      io address 360 and shared memory address of c8000. All Brumby boards
 100  *      configured into a system must have their own separate io and memory
 101  *      addresses. No interrupt is required.
 102  *      Another example:
 103  *              { BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
 104  *      This line will configure an original Stallion board at io address 330
 105  *      and shared memory address d0000 (this would only be valid for a "V4.0"
 106  *      or Rev.O Stallion board). All Stallion boards configured into the
 107  *      system must have their own separate io and memory addresses. No
 108  *      interrupt is required.
 109  */
 110 
 111 typedef struct {
 112         int             brdtype;
 113         int             ioaddr1;
 114         int             ioaddr2;
 115         unsigned long   memaddr;
 116         int             irq;
 117         int             irqtype;
 118 } stlconf_t;
 119 
 120 static stlconf_t        stli_brdconf[] = {
 121         { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
 122 };
 123 
 124 static int      stli_nrbrds = sizeof(stli_brdconf) / sizeof(stlconf_t);
 125 
 126 /*
 127  *      Code support is offered for boards to use the above 1Mb memory
 128  *      ranges for those boards which support this (supported on the ONboard
 129  *      and ECP-EI hardware). The following switch should be enabled. The only
 130  *      catch is that the kernel functions required to do this are not
 131  *      normally exported symbols, so you will have to do some extra work
 132  *      for this to be used in the loadable module form of the driver.
 133  *      Unfortunately this doesn't work either if you linke the driver into
 134  *      the kernel, sincethe memory management code is not set up early
 135  *      enough (before our initialization routine is run).
 136  */
 137 #define STLI_HIMEMORY   0
 138 
 139 #if STLI_HIMEMORY
 140 #include <asm/page.h>
 141 #include <asm/pgtable.h>
 142 #endif
 143 
 144 /*
 145  *      There is some experimental EISA board detection code in this driver.
 146  *      By default it is disabled, but for those that want to try it out,
 147  *      then set the define below to be 1.
 148  */
 149 #define STLI_EISAPROBE  0
 150 
 151 /*****************************************************************************/
 152 
 153 /*
 154  *      Define some important driver characteristics. Device major numbers
 155  *      allocated as per Linux Device Registery.
 156  */
 157 #ifndef STL_SIOMEMMAJOR
 158 #define STL_SIOMEMMAJOR         28
 159 #endif
 160 #ifndef STL_SERIALMAJOR
 161 #define STL_SERIALMAJOR         24
 162 #endif
 163 #ifndef STL_CALLOUTMAJOR
 164 #define STL_CALLOUTMAJOR        25
 165 #endif
 166 
 167 #define STL_DRVTYPSERIAL        1
 168 #define STL_DRVTYPCALLOUT       2
 169 
 170 #define STL_MAXBRDS             4
 171 #define STL_MAXPANELS           4
 172 #define STL_MAXPORTS            64
 173 #define STL_MAXCHANS            (STL_MAXPORTS + 1)
 174 #define STL_MAXDEVS             (STL_MAXBRDS * STL_MAXPORTS)
 175 
 176 /*****************************************************************************/
 177 
 178 /*
 179  *      Define our local driver identity first. Set up stuff to deal with
 180  *      all the local structures required by a serial tty driver.
 181  */
 182 static char     *stli_drvname = "Stallion Intelligent Multiport Serial Driver";
 183 static char     *stli_drvversion = "1.0.6";
 184 static char     *stli_serialname = "ttyE";
 185 static char     *stli_calloutname = "cue";
 186 
 187 static struct tty_driver        stli_serial;
 188 static struct tty_driver        stli_callout;
 189 static struct tty_struct        *stli_ttys[STL_MAXDEVS];
 190 static struct termios           *stli_termios[STL_MAXDEVS];
 191 static struct termios           *stli_termioslocked[STL_MAXDEVS];
 192 static int                      stli_refcount;
 193 
 194 /*
 195  *      We will need to allocate a temporary write buffer for chars that
 196  *      come direct from user space. The problem is that a copy from user
 197  *      space might cause a page fault (typically on a system that is
 198  *      swapping!). All ports will share one buffer - since if the system
 199  *      is already swapping a shared buffer won't make things any worse.
 200  */
 201 static char                     *stli_tmpwritebuf = (char *) NULL;
 202 static struct semaphore         stli_tmpwritesem = MUTEX;
 203 
 204 #define STLI_TXBUFSIZE          4096
 205 
 206 /*
 207  *      Use a fast local buffer for cooked characters. Typically a whole
 208  *      bunch of cooked characters come in for a port, 1 at a time. So we
 209  *      save those up into a local buffer, then write out the whole lot
 210  *      with a large memcpy. Just use 1 buffer for all ports, since its
 211  *      use it is only need for short periods of time by each port.
 212  */
 213 static char                     *stli_txcookbuf = (char *) NULL;
 214 static int                      stli_txcooksize = 0;
 215 static int                      stli_txcookrealsize = 0;
 216 static struct tty_struct        *stli_txcooktty = (struct tty_struct *) NULL;
 217 
 218 /*
 219  *      Define a local default termios struct. All ports will be created
 220  *      with this termios initially. Basically all it defines is a raw port
 221  *      at 9600 baud, 8 data bits, no parity, 1 stop bit.
 222  */
 223 static struct termios           stli_deftermios = {
 224         0,
 225         0,
 226         (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
 227         0,
 228         0,
 229         INIT_C_CC
 230 };
 231 
 232 /*
 233  *      Define global stats structures. Not used often, and can be
 234  *      re-used for each stats call.
 235  */
 236 static comstats_t       stli_comstats;
 237 static combrd_t         stli_brdstats;
 238 static asystats_t       stli_cdkstats;
 239 
 240 /*****************************************************************************/
 241 
 242 /*
 243  *      Define a set of structures to hold all the board/panel/port info
 244  *      for our ports. These will be dynamically allocated as required at
 245  *      driver initialization time.
 246  */
 247 
 248 /*
 249  *      Port and board structures to hold status info about each object.
 250  *      The board structure contains pointers to structures for each port
 251  *      connected to it. Panels are not distinguished here, since
 252  *      communication with the slave board will always be on a per port
 253  *      basis.
 254  */
 255 typedef struct {
 256         int                     portnr;
 257         int                     panelnr;
 258         int                     brdnr;
 259         unsigned long           state;
 260         int                     devnr;
 261         int                     flags;
 262         int                     baud_base;
 263         int                     custom_divisor;
 264         int                     close_delay;
 265         int                     closing_wait;
 266         int                     refcount;
 267         int                     openwaitcnt;
 268         int                     rc;
 269         int                     argsize;
 270         void                    *argp;
 271         long                    session;
 272         long                    pgrp;
 273         unsigned int            rxmarkmsk;
 274         struct tty_struct       *tty;
 275         struct wait_queue       *open_wait;
 276         struct wait_queue       *close_wait;
 277         struct wait_queue       *raw_wait;
 278         struct tq_struct        tqhangup;
 279         struct termios          normaltermios;
 280         struct termios          callouttermios;
 281         asysigs_t               asig;
 282         comstats_t              stats;
 283         unsigned long           addr;
 284         unsigned long           rxoffset;
 285         unsigned long           txoffset;
 286         unsigned long           sigs;
 287         unsigned long           pflag;
 288         unsigned int            rxsize;
 289         unsigned int            txsize;
 290         unsigned char           reqbit;
 291         unsigned char           portidx;
 292         unsigned char           portbit;
 293 } stliport_t;
 294 
 295 /*
 296  *      Use a structure of function pointers to do board level operations.
 297  *      These include, enable/disable, paging shared memory, interrupting, etc.
 298  */
 299 typedef struct stlbrd {
 300         int             brdnr;
 301         int             brdtype;
 302         int             state;
 303         int             nrpanels;
 304         int             nrports;
 305         int             nrdevs;
 306         unsigned int    iobase;
 307         unsigned long   memaddr;
 308         void            *membase;
 309         int             memsize;
 310         int             pagesize;
 311         int             hostoffset;
 312         int             slaveoffset;
 313         int             bitsize;
 314         int             panels[STL_MAXPANELS];
 315         int             panelids[STL_MAXPANELS];
 316         void            (*init)(struct stlbrd *brdp);
 317         void            (*enable)(struct stlbrd *brdp);
 318         void            (*reenable)(struct stlbrd *brdp);
 319         void            (*disable)(struct stlbrd *brdp);
 320         char            *(*getmemptr)(struct stlbrd *brdp, unsigned long offset, int line);
 321         void            (*intr)(struct stlbrd *brdp);
 322         void            (*reset)(struct stlbrd *brdp);
 323         stliport_t      *ports[STL_MAXPORTS];
 324 } stlibrd_t;
 325 
 326 static stlibrd_t        *stli_brds[STL_MAXBRDS];
 327 
 328 static int              stli_shared = 0;
 329 
 330 /*
 331  *      Per board state flags. Used with the state field of the board struct.
 332  *      Not really much here... All we need to do is keep track of whether
 333  *      the board has been detected, and whether it is actully running a slave
 334  *      or not.
 335  */
 336 #define BST_FOUND       0x1
 337 #define BST_STARTED     0x2
 338 
 339 /*
 340  *      Define the set of port state flags. These are marked for internal
 341  *      state purposes only, usually to do with the state of communications
 342  *      with the slave. Most of them need to be updated atomically, so always
 343  *      use the bit setting operations (unless protected by cli/sti).
 344  */
 345 #define ST_INITIALIZING 1
 346 #define ST_OPENING      2
 347 #define ST_CLOSING      3
 348 #define ST_CMDING       4
 349 #define ST_TXBUSY       5
 350 #define ST_RXING        6
 351 #define ST_DOFLUSHRX    7
 352 #define ST_DOFLUSHTX    8
 353 #define ST_DOSIGS       9
 354 #define ST_RXSTOP       10
 355 #define ST_GETSIGS      11
 356 
 357 /*
 358  *      Define an array of board names as printable strings. Handy for
 359  *      referencing boards when printing trace and stuff.
 360  */
 361 static char     *stli_brdnames[] = {
 362         "Unknown",
 363         "Stallion",
 364         "Brumby",
 365         "ONboard-MC",
 366         "ONboard",
 367         "Brumby",
 368         "Brumby",
 369         "ONboard-EI",
 370         (char *) NULL,
 371         "ONboard",
 372         "ONboard-MC",
 373         "ONboard-MC",
 374         (char *) NULL,
 375         (char *) NULL,
 376         (char *) NULL,
 377         (char *) NULL,
 378         (char *) NULL,
 379         (char *) NULL,
 380         (char *) NULL,
 381         (char *) NULL,
 382         "EasyIO",
 383         "EC8/32-AT",
 384         "EC8/32-MC",
 385         "EC8/64-AT",
 386         "EC8/64-EI",
 387         "EC8/64-MC",
 388         "EC8/32-PCI",
 389 };
 390 
 391 /*
 392  *      Set up a default memory address table for EISA board probing.
 393  *      The default addresses are all bellow 1Mbyte, which has to be the
 394  *      case anyway. They should be safe, since we only read values from
 395  *      them, and interrupts are disabled while we do it. If the higher
 396  *      memory support is compiled in then we also try probing around
 397  *      the 1Gb, 2Gb and 3Gb areas as well...
 398  */
 399 static unsigned long    stli_eisamemprobeaddrs[] = {
 400         0xc0000, 0xd0000, 0xe0000, 0xf0000,
 401         0x80000000, 0x80010000, 0x80020000, 0x80030000,
 402         0x40000000, 0x40010000, 0x40020000, 0x40030000,
 403         0xc0000000, 0xc0010000, 0xc0020000, 0xc0030000,
 404         0xff000000, 0xff010000, 0xff020000, 0xff030000,
 405 };
 406 
 407 #if STLI_HIMEMORY
 408 static int      stli_eisamempsize = sizeof(stli_eisamemprobeaddrs) / sizeof(unsigned long);
 409 #else
 410 static int      stli_eisamempsize = 4;
 411 #endif
 412 
 413 int             stli_eisaprobe = STLI_EISAPROBE;
 414 
 415 /*****************************************************************************/
 416 
 417 /*
 418  *      Hardware configuration info for ECP boards. These defines apply
 419  *      to the directly accessable io ports of the ECP. There is a set of
 420  *      defines for each ECP board type, ISA, EISA and MCA.
 421  */
 422 #define ECP_IOSIZE      4
 423 #define ECP_MEMSIZE     (128 * 1024)
 424 #define ECP_ATPAGESIZE  (4 * 1024)
 425 #define ECP_EIPAGESIZE  (64 * 1024)
 426 #define ECP_MCPAGESIZE  (4 * 1024)
 427 
 428 #define STL_EISAID      0x8c4e
 429 
 430 /*
 431  *      Important defines for the ISA class of ECP board.
 432  */
 433 #define ECP_ATIREG      0
 434 #define ECP_ATCONFR     1
 435 #define ECP_ATMEMAR     2
 436 #define ECP_ATMEMPR     3
 437 #define ECP_ATSTOP      0x1
 438 #define ECP_ATINTENAB   0x10
 439 #define ECP_ATENABLE    0x20
 440 #define ECP_ATDISABLE   0x00
 441 #define ECP_ATADDRMASK  0x3f000
 442 #define ECP_ATADDRSHFT  12
 443 
 444 /*
 445  *      Important defines for the EISA class of ECP board.
 446  */
 447 #define ECP_EIIREG      0
 448 #define ECP_EIMEMARL    1
 449 #define ECP_EICONFR     2
 450 #define ECP_EIMEMARH    3
 451 #define ECP_EIENABLE    0x1
 452 #define ECP_EIDISABLE   0x0
 453 #define ECP_EISTOP      0x4
 454 #define ECP_EIEDGE      0x00
 455 #define ECP_EILEVEL     0x80
 456 #define ECP_EIADDRMASKL 0x00ff0000
 457 #define ECP_EIADDRSHFTL 16
 458 #define ECP_EIADDRMASKH 0xff000000
 459 #define ECP_EIADDRSHFTH 24
 460 #define ECP_EIBRDENAB   0xc84
 461 
 462 #define ECP_EISAID      0x4
 463 
 464 /*
 465  *      Important defines for the Micro-channel class of ECP board.
 466  *      (It has a lot in common with the ISA boards.)
 467  */
 468 #define ECP_MCIREG      0
 469 #define ECP_MCCONFR     1
 470 #define ECP_MCSTOP      0x20
 471 #define ECP_MCENABLE    0x80
 472 #define ECP_MCDISABLE   0x00
 473 
 474 /*
 475  *      Hardware configuration info for ONboard and Brumby boards. These
 476  *      defines apply to the directly accessable io ports of these boards.
 477  */
 478 #define ONB_IOSIZE      16
 479 #define ONB_MEMSIZE     (64 * 1024)
 480 #define ONB_ATPAGESIZE  (64 * 1024)
 481 #define ONB_MCPAGESIZE  (64 * 1024)
 482 #define ONB_EIMEMSIZE   (128 * 1024)
 483 #define ONB_EIPAGESIZE  (64 * 1024)
 484 
 485 /*
 486  *      Important defines for the ISA class of ONboard board.
 487  */
 488 #define ONB_ATIREG      0
 489 #define ONB_ATMEMAR     1
 490 #define ONB_ATCONFR     2
 491 #define ONB_ATSTOP      0x4
 492 #define ONB_ATENABLE    0x01
 493 #define ONB_ATDISABLE   0x00
 494 #define ONB_ATADDRMASK  0xff0000
 495 #define ONB_ATADDRSHFT  16
 496 
 497 #if STLI_HIMEMORY
 498 #define ONB_HIMEMENAB   0x02
 499 #else
 500 #define ONB_HIMEMENAB   0
 501 #endif
 502 
 503 /*
 504  *      Important defines for the EISA class of ONboard board.
 505  */
 506 #define ONB_EIIREG      0
 507 #define ONB_EIMEMARL    1
 508 #define ONB_EICONFR     2
 509 #define ONB_EIMEMARH    3
 510 #define ONB_EIENABLE    0x1
 511 #define ONB_EIDISABLE   0x0
 512 #define ONB_EISTOP      0x4
 513 #define ONB_EIEDGE      0x00
 514 #define ONB_EILEVEL     0x80
 515 #define ONB_EIADDRMASKL 0x00ff0000
 516 #define ONB_EIADDRSHFTL 16
 517 #define ONB_EIADDRMASKH 0xff000000
 518 #define ONB_EIADDRSHFTH 24
 519 #define ONB_EIBRDENAB   0xc84
 520 
 521 #define ONB_EISAID      0x1
 522 
 523 /*
 524  *      Important defines for the Brumby boards. They are pretty simple,
 525  *      there is not much that is programmably configurable.
 526  */
 527 #define BBY_IOSIZE      16
 528 #define BBY_MEMSIZE     (64 * 1024)
 529 #define BBY_PAGESIZE    (16 * 1024)
 530 
 531 #define BBY_ATIREG      0
 532 #define BBY_ATCONFR     1
 533 #define BBY_ATSTOP      0x4
 534 
 535 /*
 536  *      Important defines for the Stallion boards. They are pretty simple,
 537  *      there is not much that is programmably configurable.
 538  */
 539 #define STAL_IOSIZE     16
 540 #define STAL_MEMSIZE    (64 * 1024)
 541 #define STAL_PAGESIZE   (64 * 1024)
 542 
 543 /*
 544  *      Define the set of status register values for EasyConnection panels.
 545  *      The signature will return with the status value for each panel. From
 546  *      this we can determine what is attached to the board - before we have
 547  *      actually down loaded any code to it.
 548  */
 549 #define ECH_PNLSTATUS   2
 550 #define ECH_PNL16PORT   0x20
 551 #define ECH_PNLIDMASK   0x07
 552 #define ECH_PNLINTRPEND 0x80
 553 
 554 /*
 555  *      Define some macros to do things to the board. Even those these boards
 556  *      are somewhat related there is often significantly different ways of
 557  *      doing some operation on it (like enable, paging, reset, etc). So each
 558  *      board class has a set of functions which do the commonly required
 559  *      operations. The macros below basically just call these functions,
 560  *      generally checking for a NULL function - which means that the board
 561  *      needs nothing done to it to achieve this operation!
 562  */
 563 #define EBRDINIT(brdp)                                          \
 564         if (brdp->init != NULL)                                 \
 565                 (* brdp->init)(brdp)
 566 
 567 #define EBRDENABLE(brdp)                                        \
 568         if (brdp->enable != NULL)                               \
 569                 (* brdp->enable)(brdp);
 570 
 571 #define EBRDDISABLE(brdp)                                       \
 572         if (brdp->disable != NULL)                              \
 573                 (* brdp->disable)(brdp);
 574 
 575 #define EBRDINTR(brdp)                                          \
 576         if (brdp->intr != NULL)                                 \
 577                 (* brdp->intr)(brdp);
 578 
 579 #define EBRDRESET(brdp)                                         \
 580         if (brdp->reset != NULL)                                \
 581                 (* brdp->reset)(brdp);
 582 
 583 #define EBRDGETMEMPTR(brdp,offset)                              \
 584         (* brdp->getmemptr)(brdp, offset, __LINE__)
 585 
 586 /*
 587  *      Define the maximal baud rate, and the default baud base for ports.
 588  */
 589 #define STL_MAXBAUD     230400
 590 #define STL_BAUDBASE    115200
 591 #define STL_CLOSEDELAY  50
 592 
 593 /*****************************************************************************/
 594 
 595 /*
 596  *      Define macros to extract a brd or port number from a minor number.
 597  */
 598 #define MKDEV2BRD(min)          (((min) & 0xc0) >> 6)
 599 #define MKDEV2PORT(min)         ((min) & 0x3f)
 600 
 601 /*
 602  *      Define a baud rate table that converts termios baud rate selector
 603  *      into the actual baud rate value. All baud rate calculations are based
 604  *      on the actual baud rate required.
 605  */
 606 static unsigned int     stli_baudrates[] = {
 607         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
 608         9600, 19200, 38400, 57600, 115200, 230400
 609 };
 610 
 611 /*****************************************************************************/
 612 
 613 /*
 614  *      Define some handy local macros...
 615  */
 616 #define MIN(a,b)                (((a) <= (b)) ? (a) : (b))
 617 
 618 /*****************************************************************************/
 619 
 620 /*
 621  *      Prototype all functions in this driver!
 622  */
 623 
 624 #ifdef MODULE
 625 int             init_module(void);
 626 void            cleanup_module(void);
 627 #endif
 628 
 629 int             stli_init(void);
 630 static int      stli_open(struct tty_struct *tty, struct file *filp);
 631 static void     stli_close(struct tty_struct *tty, struct file *filp);
 632 static int      stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
 633 static void     stli_putchar(struct tty_struct *tty, unsigned char ch);
 634 static void     stli_flushchars(struct tty_struct *tty);
 635 static int      stli_writeroom(struct tty_struct *tty);
 636 static int      stli_charsinbuffer(struct tty_struct *tty);
 637 static int      stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
 638 static void     stli_settermios(struct tty_struct *tty, struct termios *old);
 639 static void     stli_throttle(struct tty_struct *tty);
 640 static void     stli_unthrottle(struct tty_struct *tty);
 641 static void     stli_stop(struct tty_struct *tty);
 642 static void     stli_start(struct tty_struct *tty);
 643 static void     stli_flushbuffer(struct tty_struct *tty);
 644 static void     stli_hangup(struct tty_struct *tty);
 645 
 646 static int      stli_initbrds(void);
 647 static int      stli_brdinit(stlibrd_t *brdp);
 648 static int      stli_initecp(stlibrd_t *brdp);
 649 static int      stli_initonb(stlibrd_t *brdp);
 650 static int      stli_eisamemprobe(stlibrd_t *brdp);
 651 static int      stli_findeisabrds(void);
 652 static int      stli_initports(stlibrd_t *brdp);
 653 static int      stli_startbrd(stlibrd_t *brdp);
 654 static int      stli_memread(struct inode *ip, struct file *fp, char *buf, int count);
 655 static int      stli_memwrite(struct inode *ip, struct file *fp, const char *buf, int count);
 656 static int      stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
 657 static void     stli_poll(unsigned long arg);
 658 static int      stli_hostcmd(stlibrd_t *brdp, int channr);
 659 static int      stli_initopen(stlibrd_t *brdp, stliport_t *portp);
 660 static int      stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 661 static int      stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 662 static int      stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
 663 static void     stli_dohangup(void *arg);
 664 static void     stli_delay(int len);
 665 static int      stli_setport(stliport_t *portp);
 666 static int      stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 667 static void     stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 668 static void     stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp);
 669 static void     stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
 670 static void     stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
 671 static long     stli_mktiocm(unsigned long sigvalue);
 672 static void     stli_read(stlibrd_t *brdp, stliport_t *portp);
 673 static void     stli_getserial(stliport_t *portp, struct serial_struct *sp);
 674 static int      stli_setserial(stliport_t *portp, struct serial_struct *sp);
 675 static int      stli_getbrdstats(combrd_t *bp);
 676 static int      stli_getportstats(stliport_t *portp, comstats_t *cp);
 677 static int      stli_clrportstats(stliport_t *portp, comstats_t *cp);
 678 static void     *stli_memalloc(int len);
 679 
 680 static void     stli_ecpinit(stlibrd_t *brdp);
 681 static void     stli_ecpenable(stlibrd_t *brdp);
 682 static void     stli_ecpdisable(stlibrd_t *brdp);
 683 static char     *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 684 static void     stli_ecpreset(stlibrd_t *brdp);
 685 static void     stli_ecpintr(stlibrd_t *brdp);
 686 static void     stli_ecpeiinit(stlibrd_t *brdp);
 687 static void     stli_ecpeienable(stlibrd_t *brdp);
 688 static void     stli_ecpeidisable(stlibrd_t *brdp);
 689 static char     *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 690 static void     stli_ecpeireset(stlibrd_t *brdp);
 691 static void     stli_ecpmcenable(stlibrd_t *brdp);
 692 static void     stli_ecpmcdisable(stlibrd_t *brdp);
 693 static char     *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 694 static void     stli_ecpmcreset(stlibrd_t *brdp);
 695 
 696 static void     stli_onbinit(stlibrd_t *brdp);
 697 static void     stli_onbenable(stlibrd_t *brdp);
 698 static void     stli_onbdisable(stlibrd_t *brdp);
 699 static char     *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 700 static void     stli_onbreset(stlibrd_t *brdp);
 701 static void     stli_onbeinit(stlibrd_t *brdp);
 702 static void     stli_onbeenable(stlibrd_t *brdp);
 703 static void     stli_onbedisable(stlibrd_t *brdp);
 704 static char     *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 705 static void     stli_onbereset(stlibrd_t *brdp);
 706 static void     stli_bbyinit(stlibrd_t *brdp);
 707 static char     *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 708 static void     stli_bbyreset(stlibrd_t *brdp);
 709 static void     stli_stalinit(stlibrd_t *brdp);
 710 static char     *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 711 static void     stli_stalreset(stlibrd_t *brdp);
 712 
 713 static stliport_t *stli_getport(int brdnr, int panelnr, int portnr);
 714 
 715 #if STLI_HIMEMORY
 716 static void *stli_mapbrdmem(unsigned long physaddr, unsigned int size);
 717 #endif
 718 
 719 /*****************************************************************************/
 720 
 721 /*
 722  *      Define the driver info for a user level shared memory device. This
 723  *      device will work sort of like the /dev/kmem device - except that it
 724  *      will give access to the shared memory on the Stallion intelligent
 725  *      board. This is also a very useful debugging tool.
 726  */
 727 static struct file_operations   stli_fsiomem = {
 728         NULL,
 729         stli_memread,
 730         stli_memwrite,
 731         NULL,
 732         NULL,
 733         stli_memioctl,
 734         NULL,
 735         NULL,
 736         NULL,
 737         NULL
 738 };
 739 
 740 /*****************************************************************************/
 741 
 742 /*
 743  *      Define a timer_list entry for our poll routine. The slave board
 744  *      is polled every so often to see if anything needs doing. This is
 745  *      much cheaper on host cpu than using interrupts. It turns out to
 746  *      not increase character latency by much either...
 747  */
 748 static struct timer_list        stli_timerlist = {
 749         NULL, NULL, 0, 0, stli_poll
 750 };
 751 
 752 static int      stli_timeron = 0;
 753 
 754 /*
 755  *      Define the calculation for the timeout routine.
 756  */
 757 #define STLI_TIMEOUT    (jiffies + 1)
 758 
 759 /*****************************************************************************/
 760 
 761 #ifdef MODULE
 762 
 763 /*
 764  *      Loadable module initialization stuff.
 765  */
 766 
 767 int init_module()
     /*  */
 768 {
 769         unsigned long   flags;
 770 
 771 #if DEBUG
 772         printk("init_module()\n");
 773 #endif
 774 
 775         save_flags(flags);
 776         cli();
 777         stli_init();
 778         restore_flags(flags);
 779 
 780         return(0);
 781 }
 782 
 783 /*****************************************************************************/
 784 
 785 void cleanup_module()
     /*  */
 786 {
 787         stlibrd_t       *brdp;
 788         stliport_t      *portp;
 789         unsigned long   flags;
 790         int             i, j;
 791 
 792 #if DEBUG
 793         printk("cleanup_module()\n");
 794 #endif
 795 
 796         printk("Unloading %s: version %s\n", stli_drvname, stli_drvversion);
 797 
 798         save_flags(flags);
 799         cli();
 800 
 801 /*
 802  *      Free up all allocated resources used by the ports. This includes
 803  *      memory and interrupts.
 804  */
 805         if (stli_timeron) {
 806                 stli_timeron = 0;
 807                 del_timer(&stli_timerlist);
 808         }
 809 
 810         i = tty_unregister_driver(&stli_serial);
 811         j = tty_unregister_driver(&stli_callout);
 812         if (i || j) {
 813                 printk("STALLION: failed to un-register tty driver, errno=%d,%d\n", -i, -j);
 814                 restore_flags(flags);
 815                 return;
 816         }
 817         if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
 818                 printk("STALLION: failed to un-register serial memory device, errno=%d\n", -i);
 819 
 820         if (stli_tmpwritebuf != (char *) NULL)
 821                 kfree_s(stli_tmpwritebuf, STLI_TXBUFSIZE);
 822         if (stli_txcookbuf != (char *) NULL)
 823                 kfree_s(stli_txcookbuf, STLI_TXBUFSIZE);
 824 
 825         for (i = 0; (i < stli_nrbrds); i++) {
 826                 brdp = stli_brds[i];
 827                 if (brdp == (stlibrd_t *) NULL)
 828                         continue;
 829                 for (j = 0; (j < STL_MAXPORTS); j++) {
 830                         portp = brdp->ports[j];
 831                         if (portp != (stliport_t *) NULL) {
 832                                 if (portp->tty != (struct tty_struct *) NULL)
 833                                         tty_hangup(portp->tty);
 834                                 kfree_s(portp, sizeof(stliport_t));
 835                         }
 836                 }
 837 
 838 #if STLI_HIMEMORY
 839                 if (((unsigned long) brdp->membase) >= 0x100000)
 840                         vfree(brdp->membase);
 841 #endif
 842                 if ((brdp->brdtype == BRD_ECP) || (brdp->brdtype == BRD_ECPE) || (brdp->brdtype == BRD_ECPMC))
 843                         release_region(brdp->iobase, ECP_IOSIZE);
 844                 else
 845                         release_region(brdp->iobase, ONB_IOSIZE);
 846                 kfree_s(brdp, sizeof(stlibrd_t));
 847                 stli_brds[i] = (stlibrd_t *) NULL;
 848         }
 849 
 850         restore_flags(flags);
 851 }
 852 
 853 #endif
 854 
 855 /*****************************************************************************/
 856 
 857 /*
 858  *      Local driver kernel malloc routine.
 859  */
 860 
 861 static void *stli_memalloc(int len)
     /*  */
 862 {
 863         return((void *) kmalloc(len, GFP_KERNEL));
 864 }
 865 
 866 /*****************************************************************************/
 867 
 868 static int stli_open(struct tty_struct *tty, struct file *filp)
     /*  */
 869 {
 870         stlibrd_t       *brdp;
 871         stliport_t      *portp;
 872         unsigned int    minordev;
 873         int             brdnr, portnr, rc;
 874 
 875 #if DEBUG
 876         printk("stli_open(tty=%x,filp=%x): device=%x\n", (int) tty, (int) filp, tty->device);
 877 #endif
 878 
 879         minordev = MINOR(tty->device);
 880         brdnr = MKDEV2BRD(minordev);
 881         if (brdnr >= stli_nrbrds)
 882                 return(-ENODEV);
 883         brdp = stli_brds[brdnr];
 884         if (brdp == (stlibrd_t *) NULL)
 885                 return(-ENODEV);
 886         if ((brdp->state & BST_STARTED) == 0)
 887                 return(-ENODEV);
 888         portnr = MKDEV2PORT(minordev);
 889         if ((portnr < 0) || (portnr > brdp->nrports))
 890                 return(-ENODEV);
 891 
 892         portp = brdp->ports[portnr];
 893         if (portp == (stliport_t *) NULL)
 894                 return(-ENODEV);
 895         if (portp->devnr < 1)
 896                 return(-ENODEV);
 897 
 898 /*
 899  *      Check if this port is in the middle of closing. If so then wait
 900  *      until it is closed then return error status based on flag settings.
 901  *      The sleep here does not need interrupt protection since the wakeup
 902  *      for it is done with the same context.
 903  */
 904         if (portp->flags & ASYNC_CLOSING) {
 905                 interruptible_sleep_on(&portp->close_wait);
 906                 if (portp->flags & ASYNC_HUP_NOTIFY)
 907                         return(-EAGAIN);
 908                 return(-ERESTARTSYS);
 909         }
 910 
 911 /*
 912  *      On the first open of the device setup the port hardware, and
 913  *      initialize the per port data structure. Since initializing the port
 914  *      requires serval commands to the board we will need to wait for any
 915  *      other open that is already initializing the port.
 916  */
 917         portp->tty = tty;
 918         tty->driver_data = portp;
 919         portp->refcount++;
 920 
 921         while (test_bit(ST_INITIALIZING, &portp->state)) {
 922                 if (current->signal & ~current->blocked)
 923                         return(-ERESTARTSYS);
 924                 interruptible_sleep_on(&portp->raw_wait);
 925         }
 926 
 927         if ((portp->flags & ASYNC_INITIALIZED) == 0) {
 928                 set_bit(ST_INITIALIZING, &portp->state);
 929                 if ((rc = stli_initopen(brdp, portp)) >= 0) {
 930                         portp->flags |= ASYNC_INITIALIZED;
 931                         clear_bit(TTY_IO_ERROR, &tty->flags);
 932                 }
 933                 clear_bit(ST_INITIALIZING, &portp->state);
 934                 wake_up_interruptible(&portp->raw_wait);
 935                 if (rc < 0)
 936                         return(rc);
 937         }
 938 
 939 /*
 940  *      Check if this port is in the middle of closing. If so then wait
 941  *      until it is closed then return error status, based on flag settings.
 942  *      The sleep here does not need interrupt protection since the wakeup
 943  *      for it is done with the same context.
 944  */
 945         if (portp->flags & ASYNC_CLOSING) {
 946                 interruptible_sleep_on(&portp->close_wait);
 947                 if (portp->flags & ASYNC_HUP_NOTIFY)
 948                         return(-EAGAIN);
 949                 return(-ERESTARTSYS);
 950         }
 951 
 952 /*
 953  *      Based on type of open being done check if it can overlap with any
 954  *      previous opens still in effect. If we are a normal serial device
 955  *      then also we might have to wait for carrier.
 956  */
 957         if (tty->driver.subtype == STL_DRVTYPCALLOUT) {
 958                 if (portp->flags & ASYNC_NORMAL_ACTIVE)
 959                         return(-EBUSY);
 960                 if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
 961                         if ((portp->flags & ASYNC_SESSION_LOCKOUT) &&
 962                                         (portp->session != current->session))
 963                                 return(-EBUSY);
 964                         if ((portp->flags & ASYNC_PGRP_LOCKOUT) &&
 965                                         (portp->pgrp != current->pgrp))
 966                                 return(-EBUSY);
 967                 }
 968                 portp->flags |= ASYNC_CALLOUT_ACTIVE;
 969         } else {
 970                 if (filp->f_flags & O_NONBLOCK) {
 971                         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
 972                                 return(-EBUSY);
 973                 } else {
 974                         if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
 975                                 return(rc);
 976                 }
 977                 portp->flags |= ASYNC_NORMAL_ACTIVE;
 978         }
 979 
 980         if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) {
 981                 if (tty->driver.subtype == STL_DRVTYPSERIAL)
 982                         *tty->termios = portp->normaltermios;
 983                 else
 984                         *tty->termios = portp->callouttermios;
 985                 stli_setport(portp);
 986         }
 987 
 988         portp->session = current->session;
 989         portp->pgrp = current->pgrp;
 990         return(0);
 991 }
 992 
 993 /*****************************************************************************/
 994 
 995 static void stli_close(struct tty_struct *tty, struct file *filp)
     /*  */
 996 {
 997         stlibrd_t       *brdp;
 998         stliport_t      *portp;
 999         unsigned long   flags;
1000 
1001 #if DEBUG
1002         printk("stli_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
1003 #endif
1004 
1005         portp = tty->driver_data;
1006         if (portp == (stliport_t *) NULL)
1007                 return;
1008 
1009         save_flags(flags);
1010         cli();
1011         if (tty_hung_up_p(filp)) {
1012                 restore_flags(flags);
1013                 return;
1014         }
1015         if (portp->refcount-- > 1) {
1016                 restore_flags(flags);
1017                 return;
1018         }
1019 
1020         portp->flags |= ASYNC_CLOSING;
1021 
1022         if (portp->flags & ASYNC_NORMAL_ACTIVE)
1023                 portp->normaltermios = *tty->termios;
1024         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
1025                 portp->callouttermios = *tty->termios;
1026 
1027 /*
1028  *      May want to wait for data to drain before closing. The BUSY flag
1029  *      keeps track of whether we are still transmitting or not. It is
1030  *      updated by messages from the slave - indicating when all chars
1031  *      really have drained.
1032  */
1033         if (tty == stli_txcooktty)
1034                 stli_flushchars(tty);
1035         tty->closing = 1;
1036         if (test_bit(ST_TXBUSY, &portp->state)) {
1037                 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1038                         tty_wait_until_sent(tty, portp->closing_wait);
1039         }
1040 
1041         portp->flags &= ~ASYNC_INITIALIZED;
1042         brdp = stli_brds[portp->brdnr];
1043         stli_rawclose(brdp, portp, 0, 0);
1044         if (tty->termios->c_cflag & HUPCL) {
1045                 stli_mkasysigs(&portp->asig, 0, 0);
1046                 if (test_bit(ST_CMDING, &portp->state))
1047                         set_bit(ST_DOSIGS, &portp->state);
1048                 else
1049                         stli_sendcmd(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1050         }
1051         clear_bit(ST_TXBUSY, &portp->state);
1052         clear_bit(ST_RXSTOP, &portp->state);
1053         set_bit(TTY_IO_ERROR, &tty->flags);
1054         if (tty->ldisc.flush_buffer)
1055                 (tty->ldisc.flush_buffer)(tty);
1056         set_bit(ST_DOFLUSHRX, &portp->state);
1057         stli_flushbuffer(tty);
1058 
1059         tty->closing = 0;
1060         tty->driver_data = (void *) NULL;
1061         portp->tty = (struct tty_struct *) NULL;
1062 
1063         if (portp->openwaitcnt) {
1064                 if (portp->close_delay)
1065                         stli_delay(portp->close_delay);
1066                 wake_up_interruptible(&portp->open_wait);
1067         }
1068 
1069         portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1070         wake_up_interruptible(&portp->close_wait);
1071         restore_flags(flags);
1072 }
1073 
1074 /*****************************************************************************/
1075 
1076 /*
1077  *      Carry out first open operations on a port. This involves a number of
1078  *      commands to be sent to the slave. We need to open the port, set the
1079  *      notification events, set the initial port settings, get and set the
1080  *      initial signal values. We sleep and wait in between each one. But
1081  *      this still all happens pretty quickly.
1082  */
1083 
1084 static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
     /*  */
1085 {
1086         struct tty_struct       *tty;
1087         asynotify_t             nt;
1088         asyport_t               aport;
1089         int                     rc;
1090 
1091 #if DEBUG
1092         printk("stli_initopen(brdp=%x,portp=%x)\n", (int) brdp, (int) portp);
1093 #endif
1094 
1095         if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
1096                 return(rc);
1097 
1098         memset(&nt, 0, sizeof(asynotify_t));
1099         nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
1100         nt.signal = SG_DCD;
1101         if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt, sizeof(asynotify_t), 0)) < 0)
1102                 return(rc);
1103 
1104         tty = portp->tty;
1105         if (tty == (struct tty_struct *) NULL)
1106                 return(-ENODEV);
1107         stli_mkasyport(portp, &aport, tty->termios);
1108         if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0)) < 0)
1109                 return(rc);
1110 
1111         set_bit(ST_GETSIGS, &portp->state);
1112         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig, sizeof(asysigs_t), 1)) < 0)
1113                 return(rc);
1114         if (clear_bit(ST_GETSIGS, &portp->state))
1115                 portp->sigs = stli_mktiocm(portp->asig.sigvalue);
1116         stli_mkasysigs(&portp->asig, 1, 1);
1117         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0)) < 0)
1118                 return(rc);
1119 
1120         return(0);
1121 }
1122 
1123 /*****************************************************************************/
1124 
1125 /*
1126  *      Send an open message to the slave. This will sleep waiting for the
1127  *      acknowledgement, so must have user context. We need to co-ordinate
1128  *      with close events here, since we don't want open and close events
1129  *      to overlap.
1130  */
1131 
1132 static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
     /*  */
1133 {
1134         volatile cdkhdr_t       *hdrp;
1135         volatile cdkctrl_t      *cp;
1136         volatile unsigned char  *bits;
1137         unsigned long           flags;
1138         int                     rc;
1139 
1140 #if DEBUG
1141         printk("stli_rawopen(brdp=%x,portp=%x,arg=%x,wait=%d)\n", (int) brdp, (int) portp, (int) arg, wait);
1142 #endif
1143 
1144 /*
1145  *      Send a message to the slave to open this port.
1146  */
1147         save_flags(flags);
1148         cli();
1149 
1150 /*
1151  *      Slave is already closing this port. This can happen if a hangup
1152  *      occurs on this port. So we must wait until it is complete. The
1153  *      order of opens and closes may not be preserved across shared
1154  *      memory, so we must wait until it is complete.
1155  */
1156         while (test_bit(ST_CLOSING, &portp->state)) {
1157                 if (current->signal & ~current->blocked) {
1158                         restore_flags(flags);
1159                         return(-ERESTARTSYS);
1160                 }
1161                 interruptible_sleep_on(&portp->raw_wait);
1162         }
1163 
1164 /*
1165  *      Everything is ready now, so write the open message into shared
1166  *      memory. Once the message is in set the service bits to say that
1167  *      this port wants service.
1168  */
1169         EBRDENABLE(brdp);
1170         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1171         cp->openarg = arg;
1172         cp->open = 1;
1173         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1174         hdrp->slavereq |= portp->reqbit;
1175         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1176         *bits |= portp->portbit;
1177         EBRDDISABLE(brdp);
1178 
1179         if (wait == 0) {
1180                 restore_flags(flags);
1181                 return(0);
1182         }
1183 
1184 /*
1185  *      Slave is in action, so now we must wait for the open acknowledgment
1186  *      to come back.
1187  */
1188         rc = 0;
1189         set_bit(ST_OPENING, &portp->state);
1190         while (test_bit(ST_OPENING, &portp->state)) {
1191                 if (current->signal & ~current->blocked) {
1192                         rc = -ERESTARTSYS;
1193                         break;
1194                 }
1195                 interruptible_sleep_on(&portp->raw_wait);
1196         }
1197         restore_flags(flags);
1198 
1199         if ((rc == 0) && (portp->rc != 0))
1200                 rc = -EIO;
1201         return(rc);
1202 }
1203 
1204 /*****************************************************************************/
1205 
1206 /*
1207  *      Send a close message to the slave. Normally this will sleep waiting
1208  *      for the acknowledgement, but if wait parameter is 0 it will not. If
1209  *      wait is true then must have user context (to sleep).
1210  */
1211 
1212 static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
     /*  */
1213 {
1214         volatile cdkhdr_t       *hdrp;
1215         volatile cdkctrl_t      *cp;
1216         volatile unsigned char  *bits;
1217         unsigned long           flags;
1218         int                     rc;
1219 
1220 #if DEBUG
1221         printk("stli_rawclose(brdp=%x,portp=%x,arg=%x,wait=%d)\n", (int) brdp, (int) portp, (int) arg, wait);
1222 #endif
1223 
1224         save_flags(flags);
1225         cli();
1226 
1227 /*
1228  *      Slave is already closing this port. This can happen if a hangup
1229  *      occurs on this port.
1230  */
1231         if (wait) {
1232                 while (test_bit(ST_CLOSING, &portp->state)) {
1233                         if (current->signal & ~current->blocked) {
1234                                 restore_flags(flags);
1235                                 return(-ERESTARTSYS);
1236                         }
1237                         interruptible_sleep_on(&portp->raw_wait);
1238                 }
1239         }
1240 
1241 /*
1242  *      Write the close command into shared memory.
1243  */
1244         EBRDENABLE(brdp);
1245         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1246         cp->closearg = arg;
1247         cp->close = 1;
1248         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1249         hdrp->slavereq |= portp->reqbit;
1250         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1251         *bits |= portp->portbit;
1252         EBRDDISABLE(brdp);
1253 
1254         set_bit(ST_CLOSING, &portp->state);
1255         if (wait == 0) {
1256                 restore_flags(flags);
1257                 return(0);
1258         }
1259 
1260 /*
1261  *      Slave is in action, so now we must wait for the open acknowledgment
1262  *      to come back.
1263  */
1264         rc = 0;
1265         while (test_bit(ST_CLOSING, &portp->state)) {
1266                 if (current->signal & ~current->blocked) {
1267                         rc = -ERESTARTSYS;
1268                         break;
1269                 }
1270                 interruptible_sleep_on(&portp->raw_wait);
1271         }
1272         restore_flags(flags);
1273 
1274         if ((rc == 0) && (portp->rc != 0))
1275                 rc = -EIO;
1276         return(rc);
1277 }
1278 
1279 /*****************************************************************************/
1280 
1281 /*
1282  *      Send a command to the slave and wait for the response. This must
1283  *      have user context (it sleeps). This routine is generic in that it
1284  *      can send any type of command. Its purpose is to wait for that command
1285  *      to complete (as opposed to initiating the command then returning).
1286  */
1287 
1288 static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
     /*  */
1289 {
1290         unsigned long   flags;
1291 
1292 #if DEBUG
1293         printk("stli_cmdwait(brdp=%x,portp=%x,cmd=%x,arg=%x,size=%d,copyback=%d)\n", (int) brdp, (int) portp, (int) cmd, (int) arg, size, copyback);
1294 #endif
1295 
1296         save_flags(flags);
1297         cli();
1298         while (test_bit(ST_CMDING, &portp->state)) {
1299                 if (current->signal & ~current->blocked) {
1300                         restore_flags(flags);
1301                         return(-ERESTARTSYS);
1302                 }
1303                 interruptible_sleep_on(&portp->raw_wait);
1304         }
1305 
1306         stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
1307 
1308         while (test_bit(ST_CMDING, &portp->state)) {
1309                 if (current->signal & ~current->blocked) {
1310                         restore_flags(flags);
1311                         return(-ERESTARTSYS);
1312                 }
1313                 interruptible_sleep_on(&portp->raw_wait);
1314         }
1315         restore_flags(flags);
1316 
1317         if (portp->rc != 0)
1318                 return(-EIO);
1319         return(0);
1320 }
1321 
1322 /*****************************************************************************/
1323 
1324 /*
1325  *      Send the termios settings for this port to the slave. This sleeps
1326  *      waiting for the command to complete - so must have user context.
1327  */
1328 
1329 static int stli_setport(stliport_t *portp)
     /*  */
1330 {
1331         stlibrd_t       *brdp;
1332         asyport_t       aport;
1333 
1334 #if DEBUG
1335         printk("stli_setport(portp=%x)\n", (int) portp);
1336 #endif
1337 
1338         if (portp == (stliport_t *) NULL)
1339                 return(-ENODEV);
1340         if (portp->tty == (struct tty_struct *) NULL)
1341                 return(-ENODEV);
1342         if ((portp->brdnr < 0) && (portp->brdnr >= stli_nrbrds))
1343                 return(-ENODEV);
1344         brdp = stli_brds[portp->brdnr];
1345         if (brdp == (stlibrd_t *) NULL)
1346                 return(-ENODEV);
1347 
1348         stli_mkasyport(portp, &aport, portp->tty->termios);
1349         return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
1350 }
1351 
1352 /*****************************************************************************/
1353 
1354 /*
1355  *      Wait for a specified delay period, this is not a busy-loop. It will
1356  *      give up the processor while waiting. Unfortunately this has some
1357  *      rather intimate knowledge of the process management stuff.
1358  */
1359 
1360 static void stli_delay(int len)
     /*  */
1361 {
1362 #if DEBUG
1363         printk("stl_delay(len=%d)\n", len);
1364 #endif
1365         if (len > 0) {
1366                 current->state = TASK_INTERRUPTIBLE;
1367                 current->timeout = jiffies + len;
1368                 schedule();
1369         }
1370 }
1371 
1372 /*****************************************************************************/
1373 
1374 /*
1375  *      Possibly need to wait for carrier (DCD signal) to come high. Say
1376  *      maybe because if we are clocal then we don't need to wait...
1377  */
1378 
1379 static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
     /*  */
1380 {
1381         unsigned long   flags;
1382         int             rc;
1383 
1384 #if DEBUG
1385         printk("stli_waitcarrier(brdp=%x,portp=%x,filp=%x)\n", (int) brdp, (int) portp, (int) filp);
1386 #endif
1387 
1388         rc = 0;
1389 
1390         save_flags(flags);
1391         cli();
1392         portp->openwaitcnt++;
1393         if (portp->refcount > 0)
1394                 portp->refcount--;
1395 
1396         for (;;) {
1397                 if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) {
1398                         stli_mkasysigs(&portp->asig, 1, 1);
1399                         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0)) < 0)
1400                                 break;
1401                 }
1402                 if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1403                         if (portp->flags & ASYNC_HUP_NOTIFY)
1404                                 rc = -EBUSY;
1405                         else
1406                                 rc = -ERESTARTSYS;
1407                         break;
1408                 }
1409                 if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) &&
1410                                 ((portp->flags & ASYNC_CLOSING) == 0) &&
1411                                 ((portp->tty->termios->c_cflag & CLOCAL) ||
1412                                 (portp->sigs & TIOCM_CD))) {
1413                         break;
1414                 }
1415                 if (current->signal & ~current->blocked) {
1416                         rc = -ERESTARTSYS;
1417                         break;
1418                 }
1419                 interruptible_sleep_on(&portp->open_wait);
1420         }
1421 
1422         if (! tty_hung_up_p(filp))
1423                 portp->refcount++;
1424         portp->openwaitcnt--;
1425         restore_flags(flags);
1426 
1427         return(rc);
1428 }
1429 
1430 /*****************************************************************************/
1431 
1432 /*
1433  *      Write routine. Take the data and put it in the shared memory ring
1434  *      queue. If port is not already sending chars then need to mark the
1435  *      service bits for this port.
1436  */
1437 
1438 static int stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
     /*  */
1439 {
1440         volatile cdkasy_t       *ap;
1441         volatile cdkhdr_t       *hdrp;
1442         volatile unsigned char  *bits;
1443         unsigned char           *shbuf, *chbuf;
1444         stliport_t              *portp;
1445         stlibrd_t               *brdp;
1446         unsigned int            len, stlen, head, tail, size;
1447         unsigned long           flags;
1448 
1449 #if DEBUG
1450         printk("stli_write(tty=%x,from_user=%d,buf=%x,count=%d)\n", (int) tty, from_user, (int) buf, count);
1451 #endif
1452 
1453         if ((tty == (struct tty_struct *) NULL) || (stli_tmpwritebuf == (char *) NULL))
1454                 return(0);
1455         if (tty == stli_txcooktty)
1456                 stli_flushchars(tty);
1457         portp = tty->driver_data;
1458         if (portp == (stliport_t *) NULL)
1459                 return(0);
1460         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1461                 return(0);
1462         brdp = stli_brds[portp->brdnr];
1463         if (brdp == (stlibrd_t *) NULL)
1464                 return(0);
1465         chbuf = (unsigned char *) buf;
1466 
1467 /*
1468  *      If copying direct from user space we need to be able to handle page
1469  *      faults while we are copying. To do this copy as much as we can now
1470  *      into a kernel buffer. From there we copy it into shared memory. The
1471  *      big problem is that we do not want shared memory enabled when we are
1472  *      sleeping (other boards may be serviced while asleep). Something else
1473  *      to note here is the reading of the tail twice. Since the boards
1474  *      shared memory can be on an 8-bit bus then we need to be very carefull
1475  *      reading 16 bit quantities - since both the board (slave) and host
1476  *      cound be writing and reading at the same time.
1477  */
1478         if (from_user) {
1479                 save_flags(flags);
1480                 cli();
1481                 EBRDENABLE(brdp);
1482                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1483                 head = (unsigned int) ap->txq.head;
1484                 tail = (unsigned int) ap->txq.tail;
1485                 if (tail != ((unsigned int) ap->txq.tail))
1486                         tail = (unsigned int) ap->txq.tail;
1487                 len = (head >= tail) ? (portp->txsize - (head - tail) - 1) : (tail - head - 1);
1488                 count = MIN(len, count);
1489                 EBRDDISABLE(brdp);
1490 
1491                 down(&stli_tmpwritesem);
1492                 memcpy_fromfs(stli_tmpwritebuf, chbuf, count);
1493                 up(&stli_tmpwritesem);
1494                 chbuf = &stli_tmpwritebuf[0];
1495                 restore_flags(flags);
1496         }
1497 
1498 /*
1499  *      All data is now local, shove as much as possible into shared memory.
1500  */
1501         save_flags(flags);
1502         cli();
1503         EBRDENABLE(brdp);
1504         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1505         head = (unsigned int) ap->txq.head;
1506         tail = (unsigned int) ap->txq.tail;
1507         if (tail != ((unsigned int) ap->txq.tail))
1508                 tail = (unsigned int) ap->txq.tail;
1509         size = portp->txsize;
1510         if (head >= tail) {
1511                 len = size - (head - tail) - 1;
1512                 stlen = size - head;
1513         } else {
1514                 len = tail - head - 1;
1515                 stlen = len;
1516         }
1517 
1518         len = MIN(len, count);
1519         count = 0;
1520         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1521 
1522         while (len > 0) {
1523                 stlen = MIN(len, stlen);
1524                 memcpy((shbuf + head), chbuf, stlen);
1525                 chbuf += stlen;
1526                 len -= stlen;
1527                 count += stlen;
1528                 head += stlen;
1529                 if (head >= size) {
1530                         head = 0;
1531                         stlen = tail;
1532                 }
1533         }
1534 
1535         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1536         ap->txq.head = head;
1537         if (test_bit(ST_TXBUSY, &portp->state)) {
1538                 if (ap->changed.data & DT_TXEMPTY)
1539                         ap->changed.data &= ~DT_TXEMPTY;
1540         }
1541         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1542         hdrp->slavereq |= portp->reqbit;
1543         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1544         *bits |= portp->portbit;
1545         set_bit(ST_TXBUSY, &portp->state);
1546 
1547         EBRDDISABLE(brdp);
1548         restore_flags(flags);
1549 
1550         return(count);
1551 }
1552 
1553 /*****************************************************************************/
1554 
1555 /*
1556  *      Output a single character. We put it into a temporary local buffer
1557  *      (for speed) then write out that buffer when the flushchars routine
1558  *      is called. There is a safety catch here so that if some other port
1559  *      writes chars before the current buffer has been, then we write them
1560  *      first them do the new ports.
1561  */
1562 
1563 static void stli_putchar(struct tty_struct *tty, unsigned char ch)
     /*  */
1564 {
1565 #if DEBUG
1566         printk("stli_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1567 #endif
1568 
1569         if (tty == (struct tty_struct *) NULL)
1570                 return;
1571         if (tty != stli_txcooktty) {
1572                 if (stli_txcooktty != (struct tty_struct *) NULL)
1573                         stli_flushchars(stli_txcooktty);
1574                 stli_txcooktty = tty;
1575         }
1576 
1577         stli_txcookbuf[stli_txcooksize++] = ch;
1578 }
1579 
1580 /*****************************************************************************/
1581 
1582 /*
1583  *      Transfer characters from the local TX cooking buffer to the board.
1584  *      We sort of ignore the tty that gets passed in here. We rely on the
1585  *      info stored with the TX cook buffer to tell us which port to flush
1586  *      the data on. In any case we clean out the TX cook buffer, for re-use
1587  *      by someone else.
1588  */
1589 
1590 static void stli_flushchars(struct tty_struct *tty)
     /*  */
1591 {
1592         volatile cdkhdr_t       *hdrp;
1593         volatile unsigned char  *bits;
1594         volatile cdkasy_t       *ap;
1595         struct tty_struct       *cooktty;
1596         stliport_t              *portp;
1597         stlibrd_t               *brdp;
1598         unsigned int            len, stlen, head, tail, size, count, cooksize;
1599         unsigned char           *buf, *shbuf;
1600         unsigned long           flags;
1601 
1602 #if DEBUG
1603         printk("stli_flushchars(tty=%x)\n", (int) tty);
1604 #endif
1605 
1606         cooksize = stli_txcooksize;
1607         cooktty = stli_txcooktty;
1608         stli_txcooksize = 0;
1609         stli_txcookrealsize = 0;
1610         stli_txcooktty = (struct tty_struct *) NULL;
1611 
1612         if (tty == (struct tty_struct *) NULL)
1613                 return;
1614         if (cooktty == (struct tty_struct *) NULL)
1615                 return;
1616         if (tty != cooktty)
1617                 tty = cooktty;
1618         if (cooksize == 0)
1619                 return;
1620 
1621         portp = tty->driver_data;
1622         if (portp == (stliport_t *) NULL)
1623                 return;
1624         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1625                 return;
1626         brdp = stli_brds[portp->brdnr];
1627         if (brdp == (stlibrd_t *) NULL)
1628                 return;
1629 
1630         save_flags(flags);
1631         cli();
1632         EBRDENABLE(brdp);
1633 
1634         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1635         head = (unsigned int) ap->txq.head;
1636         tail = (unsigned int) ap->txq.tail;
1637         if (tail != ((unsigned int) ap->txq.tail))
1638                 tail = (unsigned int) ap->txq.tail;
1639         size = portp->txsize;
1640         if (head >= tail) {
1641                 len = size - (head - tail) - 1;
1642                 stlen = size - head;
1643         } else {
1644                 len = tail - head - 1;
1645                 stlen = len;
1646         }
1647 
1648         len = MIN(len, cooksize);
1649         count = 0;
1650         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1651         buf = stli_txcookbuf;
1652 
1653         while (len > 0) {
1654                 stlen = MIN(len, stlen);
1655                 memcpy((shbuf + head), buf, stlen);
1656                 buf += stlen;
1657                 len -= stlen;
1658                 count += stlen;
1659                 head += stlen;
1660                 if (head >= size) {
1661                         head = 0;
1662                         stlen = tail;
1663                 }
1664         }
1665 
1666         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1667         ap->txq.head = head;
1668 
1669         if (test_bit(ST_TXBUSY, &portp->state)) {
1670                 if (ap->changed.data & DT_TXEMPTY)
1671                         ap->changed.data &= ~DT_TXEMPTY;
1672         }
1673         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1674         hdrp->slavereq |= portp->reqbit;
1675         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1676         *bits |= portp->portbit;
1677         set_bit(ST_TXBUSY, &portp->state);
1678 
1679         EBRDDISABLE(brdp);
1680         restore_flags(flags);
1681 }
1682 
1683 /*****************************************************************************/
1684 
1685 static int stli_writeroom(struct tty_struct *tty)
     /*  */
1686 {
1687         volatile cdkasyrq_t     *rp;
1688         stliport_t              *portp;
1689         stlibrd_t               *brdp;
1690         unsigned int            head, tail, len;
1691         unsigned long           flags;
1692 
1693 #if DEBUG
1694         printk("stli_writeroom(tty=%x)\n", (int) tty);
1695 #endif
1696 
1697         if (tty == (struct tty_struct *) NULL)
1698                 return(0);
1699         if (tty == stli_txcooktty) {
1700                 if (stli_txcookrealsize != 0) {
1701                         len = stli_txcookrealsize - stli_txcooksize;
1702                         return(len);
1703                 }
1704         }
1705 
1706         portp = tty->driver_data;
1707         if (portp == (stliport_t *) NULL)
1708                 return(0);
1709         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1710                 return(0);
1711         brdp = stli_brds[portp->brdnr];
1712         if (brdp == (stlibrd_t *) NULL)
1713                 return(0);
1714 
1715         save_flags(flags);
1716         cli();
1717         EBRDENABLE(brdp);
1718         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1719         head = (unsigned int) rp->head;
1720         tail = (unsigned int) rp->tail;
1721         if (tail != ((unsigned int) rp->tail))
1722                 tail = (unsigned int) rp->tail;
1723         len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
1724         len--;
1725         EBRDDISABLE(brdp);
1726         restore_flags(flags);
1727 
1728         if (tty == stli_txcooktty) {
1729                 stli_txcookrealsize = len;
1730                 len -= stli_txcooksize;
1731         }
1732         return(len);
1733 }
1734 
1735 /*****************************************************************************/
1736 
1737 /*
1738  *      Return the number of characters in the transmit buffer. Normally we
1739  *      will return the number of chars in the shared memory ring queue.
1740  *      We need to kludge around the case where the shared memory buffer is
1741  *      empty but not all characters have drained yet, for this case just
1742  *      return that there is 1 character in the buffer!
1743  */
1744 
1745 static int stli_charsinbuffer(struct tty_struct *tty)
     /*  */
1746 {
1747         volatile cdkasyrq_t     *rp;
1748         stliport_t              *portp;
1749         stlibrd_t               *brdp;
1750         unsigned int            head, tail, len;
1751         unsigned long           flags;
1752 
1753 #if DEBUG
1754         printk("stli_charsinbuffer(tty=%x)\n", (int) tty);
1755 #endif
1756 
1757         if (tty == (struct tty_struct *) NULL)
1758                 return(0);
1759         if (tty == stli_txcooktty)
1760                 stli_flushchars(tty);
1761         portp = tty->driver_data;
1762         if (portp == (stliport_t *) NULL)
1763                 return(0);
1764         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1765                 return(0);
1766         brdp = stli_brds[portp->brdnr];
1767         if (brdp == (stlibrd_t *) NULL)
1768                 return(0);
1769 
1770         save_flags(flags);
1771         cli();
1772         EBRDENABLE(brdp);
1773         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1774         head = (unsigned int) rp->head;
1775         tail = (unsigned int) rp->tail;
1776         if (tail != ((unsigned int) rp->tail))
1777                 tail = (unsigned int) rp->tail;
1778         len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
1779         if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
1780                 len = 1;
1781         EBRDDISABLE(brdp);
1782         restore_flags(flags);
1783 
1784         return(len);
1785 }
1786 
1787 /*****************************************************************************/
1788 
1789 /*
1790  *      Generate the serial struct info.
1791  */
1792 
1793 static void stli_getserial(stliport_t *portp, struct serial_struct *sp)
     /*  */
1794 {
1795         struct serial_struct    sio;
1796         stlibrd_t               *brdp;
1797 
1798 #if DEBUG
1799         printk("stli_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1800 #endif
1801 
1802         memset(&sio, 0, sizeof(struct serial_struct));
1803         sio.type = PORT_UNKNOWN;
1804         sio.line = portp->portnr;
1805         sio.irq = 0;
1806         sio.flags = portp->flags;
1807         sio.baud_base = portp->baud_base;
1808         sio.close_delay = portp->close_delay;
1809         sio.closing_wait = portp->closing_wait;
1810         sio.custom_divisor = portp->custom_divisor;
1811         sio.xmit_fifo_size = 0;
1812         sio.hub6 = 0;
1813 
1814         brdp = stli_brds[portp->brdnr];
1815         if (brdp != (stlibrd_t *) NULL)
1816                 sio.port = brdp->iobase;
1817                 
1818         memcpy_tofs(sp, &sio, sizeof(struct serial_struct));
1819 }
1820 
1821 /*****************************************************************************/
1822 
1823 /*
1824  *      Set port according to the serial struct info.
1825  *      At this point we do not do any auto-configure stuff, so we will
1826  *      just quietly ignore any requests to change irq, etc.
1827  */
1828 
1829 static int stli_setserial(stliport_t *portp, struct serial_struct *sp)
     /*  */
1830 {
1831         struct serial_struct    sio;
1832         int                     rc;
1833 
1834 #if DEBUG
1835         printk("stli_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1836 #endif
1837 
1838         memcpy_fromfs(&sio, sp, sizeof(struct serial_struct));
1839         if (!suser()) {
1840                 if ((sio.baud_base != portp->baud_base) ||
1841                                 (sio.close_delay != portp->close_delay) ||
1842                                 ((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK)))
1843                         return(-EPERM);
1844         } 
1845 
1846         portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK);
1847         portp->baud_base = sio.baud_base;
1848         portp->close_delay = sio.close_delay;
1849         portp->closing_wait = sio.closing_wait;
1850         portp->custom_divisor = sio.custom_divisor;
1851 
1852         if ((rc = stli_setport(portp)) < 0)
1853                 return(rc);
1854         return(0);
1855 }
1856 
1857 /*****************************************************************************/
1858 
1859 static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
     /*  */
1860 {
1861         stliport_t      *portp;
1862         stlibrd_t       *brdp;
1863         unsigned long   val;
1864         int             rc;
1865 
1866 #if DEBUG
1867         printk("stli_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg);
1868 #endif
1869 
1870         if (tty == (struct tty_struct *) NULL)
1871                 return(-ENODEV);
1872         portp = tty->driver_data;
1873         if (portp == (stliport_t *) NULL)
1874                 return(-ENODEV);
1875         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1876                 return(0);
1877         brdp = stli_brds[portp->brdnr];
1878         if (brdp == (stlibrd_t *) NULL)
1879                 return(0);
1880 
1881         rc = 0;
1882 
1883         switch (cmd) {
1884         case TCSBRK:
1885                 if ((rc = tty_check_change(tty)) == 0) {
1886                         tty_wait_until_sent(tty, 0);
1887                         if (! arg) {
1888                                 val = 250;
1889                                 rc = stli_cmdwait(brdp, portp, A_BREAK, &val, sizeof(unsigned long), 0);
1890                         }
1891                 }
1892                 break;
1893         case TCSBRKP:
1894                 if ((rc = tty_check_change(tty)) == 0) {
1895                         tty_wait_until_sent(tty, 0);
1896                         val = (arg ? (arg * 100) : 250);
1897                         rc = stli_cmdwait(brdp, portp, A_BREAK, &val, sizeof(unsigned long), 0);
1898                 }
1899                 break;
1900         case TIOCGSOFTCAR:
1901                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long))) == 0)
1902                         put_fs_long(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned long *) arg);
1903                 break;
1904         case TIOCSSOFTCAR:
1905                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1906                         arg = get_fs_long((unsigned long *) arg);
1907                         tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0);
1908                 }
1909                 break;
1910         case TIOCMGET:
1911                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int))) == 0) {
1912                         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig, sizeof(asysigs_t), 1)) < 0)
1913                                 return(rc);
1914                         val = stli_mktiocm(portp->asig.sigvalue);
1915                         put_fs_long(val, (unsigned long *) arg);
1916                 }
1917                 break;
1918         case TIOCMBIS:
1919                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1920                         arg = get_fs_long((unsigned long *) arg);
1921                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 1 : -1), ((arg & TIOCM_RTS) ? 1 : -1));
1922                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1923                 }
1924                 break;
1925         case TIOCMBIC:
1926                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1927                         arg = get_fs_long((unsigned long *) arg);
1928                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 0 : -1), ((arg & TIOCM_RTS) ? 0 : -1));
1929                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1930                 }
1931                 break;
1932         case TIOCMSET:
1933                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1934                         arg = get_fs_long((unsigned long *) arg);
1935                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 1 : 0), ((arg & TIOCM_RTS) ? 1 : 0));
1936                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1937                 }
1938                 break;
1939         case TIOCGSERIAL:
1940                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct))) == 0)
1941                         stli_getserial(portp, (struct serial_struct *) arg);
1942                 break;
1943         case TIOCSSERIAL:
1944                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(struct serial_struct))) == 0)
1945                         rc = stli_setserial(portp, (struct serial_struct *) arg);
1946                 break;
1947         case STL_GETPFLAG:
1948                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned long))) == 0)
1949                         put_fs_long(portp->pflag, (unsigned long *) arg);
1950                 break;
1951         case STL_SETPFLAG:
1952                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(unsigned long))) == 0) {
1953                         portp->pflag = get_fs_long((unsigned long *) arg);
1954                         stli_setport(portp);
1955                 }
1956                 break;
1957         case COM_GETPORTSTATS:
1958                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
1959                         rc = stli_getportstats(portp, (comstats_t *) arg);
1960                 break;
1961         case COM_CLRPORTSTATS:
1962                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
1963                         rc = stli_clrportstats(portp, (comstats_t *) arg);
1964                 break;
1965         case TIOCSERCONFIG:
1966         case TIOCSERGWILD:
1967         case TIOCSERSWILD:
1968         case TIOCSERGETLSR:
1969         case TIOCSERGSTRUCT:
1970         case TIOCSERGETMULTI:
1971         case TIOCSERSETMULTI:
1972         default:
1973                 rc = -ENOIOCTLCMD;
1974                 break;
1975         }
1976 
1977         return(rc);
1978 }
1979 
1980 /*****************************************************************************/
1981 
1982 /*
1983  *      This routine assumes that we have user context and can sleep.
1984  *      Looks like it is true for the current ttys implementation..!!
1985  */
1986 
1987 static void stli_settermios(struct tty_struct *tty, struct termios *old)
     /*  */
1988 {
1989         stliport_t      *portp;
1990         stlibrd_t       *brdp;
1991         struct termios  *tiosp;
1992         asyport_t       aport;
1993 
1994 #if DEBUG
1995         printk("stli_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
1996 #endif
1997 
1998         if (tty == (struct tty_struct *) NULL)
1999                 return;
2000         portp = tty->driver_data;
2001         if (portp == (stliport_t *) NULL)
2002                 return;
2003         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2004                 return;
2005         brdp = stli_brds[portp->brdnr];
2006         if (brdp == (stlibrd_t *) NULL)
2007                 return;
2008 
2009         tiosp = tty->termios;
2010         if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag))
2011                 return;
2012 
2013         stli_mkasyport(portp, &aport, tiosp);
2014         stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
2015         stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
2016         stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
2017         if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
2018                 tty->hw_stopped = 0;
2019         if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
2020                 wake_up_interruptible(&portp->open_wait);
2021 }
2022 
2023 /*****************************************************************************/
2024 
2025 /*
2026  *      Attempt to flow control who ever is sending us data. We won't really
2027  *      do any flow control action here. We can't directly, and even if we
2028  *      wanted to we would have to send a command to the slave. The slave
2029  *      knows how to flow control, and will do so when its buffers reach its
2030  *      internal high water marks. So what we will do is set a local state
2031  *      bit that will stop us sending any RX data up from the poll routine
2032  *      (which is the place where RX data from the slave is handled).
2033  */
2034 
2035 static void stli_throttle(struct tty_struct *tty)
     /*  */
2036 {
2037         stliport_t      *portp;
2038 
2039 #if DEBUG
2040         printk("stli_throttle(tty=%x)\n", (int) tty);
2041 #endif
2042 
2043         if (tty == (struct tty_struct *) NULL)
2044                 return;
2045         portp = tty->driver_data;
2046         if (portp == (stliport_t *) NULL)
2047                 return;
2048 
2049         set_bit(ST_RXSTOP, &portp->state);
2050 }
2051 
2052 /*****************************************************************************/
2053 
2054 /*
2055  *      Unflow control the device sending us data... That means that all
2056  *      we have to do is clear the RXSTOP state bit. The next poll call
2057  *      will then be able to pass the RX data back up.
2058  */
2059 
2060 static void stli_unthrottle(struct tty_struct *tty)
     /*  */
2061 {
2062         stliport_t      *portp;
2063 
2064 #if DEBUG
2065         printk("stli_unthrottle(tty=%x)\n", (int) tty);
2066 #endif
2067 
2068         if (tty == (struct tty_struct *) NULL)
2069                 return;
2070         portp = tty->driver_data;
2071         if (portp == (stliport_t *) NULL)
2072                 return;
2073 
2074         clear_bit(ST_RXSTOP, &portp->state);
2075 }
2076 
2077 /*****************************************************************************/
2078 
2079 /*
2080  *      Stop the transmitter. Basically to do this we will just turn TX
2081  *      interrupts off.
2082  */
2083 
2084 static void stli_stop(struct tty_struct *tty)
     /*  */
2085 {
2086         stlibrd_t       *brdp;
2087         stliport_t      *portp;
2088         asyctrl_t       actrl;
2089 
2090 #if DEBUG
2091         printk("stli_stop(tty=%x)\n", (int) tty);
2092 #endif
2093 
2094         if (tty == (struct tty_struct *) NULL)
2095                 return;
2096         portp = tty->driver_data;
2097         if (portp == (stliport_t *) NULL)
2098                 return;
2099         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2100                 return;
2101         brdp = stli_brds[portp->brdnr];
2102         if (brdp == (stlibrd_t *) NULL)
2103                 return;
2104 
2105         memset(&actrl, 0, sizeof(asyctrl_t));
2106         actrl.txctrl = CT_STOPFLOW;
2107 #if 0
2108         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t));
2109 #endif
2110 }
2111 
2112 /*****************************************************************************/
2113 
2114 /*
2115  *      Start the transmitter again. Just turn TX interrupts back on.
2116  */
2117 
2118 static void stli_start(struct tty_struct *tty)
     /*  */
2119 {
2120         stliport_t      *portp;
2121         stlibrd_t       *brdp;
2122         asyctrl_t       actrl;
2123 
2124 #if DEBUG
2125         printk("stli_start(tty=%x)\n", (int) tty);
2126 #endif
2127 
2128         if (tty == (struct tty_struct *) NULL)
2129                 return;
2130         portp = tty->driver_data;
2131         if (portp == (stliport_t *) NULL)
2132                 return;
2133         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2134                 return;
2135         brdp = stli_brds[portp->brdnr];
2136         if (brdp == (stlibrd_t *) NULL)
2137                 return;
2138 
2139         memset(&actrl, 0, sizeof(asyctrl_t));
2140         actrl.txctrl = CT_STARTFLOW;
2141 #if 0
2142         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t));
2143 #endif
2144 }
2145 
2146 /*****************************************************************************/
2147 
2148 /*
2149  *      Scheduler called hang up routine. This is called from the scheduler,
2150  *      not direct from the driver "poll" routine. We can't call it there
2151  *      since the real local hangup code will enable/disable the board and
2152  *      other things that we can't do while handling the poll. Much easier
2153  *      to deal with it some time later (don't really care when, hangups
2154  *      aren't that time critical).
2155  */
2156 
2157 static void stli_dohangup(void *arg)
     /*  */
2158 {
2159         stliport_t      *portp;
2160 
2161 #if DEBUG
2162         printk("stli_dohangup(portp=%x)\n", (int) arg);
2163 #endif
2164 
2165         portp = (stliport_t *) arg;
2166         if (portp == (stliport_t *) NULL)
2167                 return;
2168         if (portp->tty == (struct tty_struct *) NULL)
2169                 return;
2170         tty_hangup(portp->tty);
2171 }
2172 
2173 /*****************************************************************************/
2174 
2175 /*
2176  *      Hangup this port. This is pretty much like closing the port, only
2177  *      a little more brutal. No waiting for data to drain. Shutdown the
2178  *      port and maybe drop signals. This is rather tricky really. We want
2179  *      to close the port as well.
2180  */
2181 
2182 static void stli_hangup(struct tty_struct *tty)
     /*  */
2183 {
2184         stliport_t      *portp;
2185         stlibrd_t       *brdp;
2186         unsigned long   flags;
2187 
2188 #if DEBUG
2189         printk("stli_hangup(tty=%x)\n", (int) tty);
2190 #endif
2191 
2192         if (tty == (struct tty_struct *) NULL)
2193                 return;
2194         portp = tty->driver_data;
2195         if (portp == (stliport_t *) NULL)
2196                 return;
2197         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2198                 return;
2199         brdp = stli_brds[portp->brdnr];
2200         if (brdp == (stlibrd_t *) NULL)
2201                 return;
2202 
2203         portp->flags &= ~ASYNC_INITIALIZED;
2204 
2205         save_flags(flags);
2206         cli();
2207         if (! test_bit(ST_CLOSING, &portp->state))
2208                 stli_rawclose(brdp, portp, 0, 0);
2209         if (tty->termios->c_cflag & HUPCL) {
2210                 stli_mkasysigs(&portp->asig, 0, 0);
2211                 if (test_bit(ST_CMDING, &portp->state)) {
2212                         set_bit(ST_DOSIGS, &portp->state);
2213                         set_bit(ST_DOFLUSHTX, &portp->state);
2214                         set_bit(ST_DOFLUSHRX, &portp->state);
2215                 } else {
2216                         stli_sendcmd(brdp, portp, A_SETSIGNALSF, &portp->asig, sizeof(asysigs_t), 0);
2217                 }
2218         }
2219         restore_flags(flags);
2220 
2221         clear_bit(ST_TXBUSY, &portp->state);
2222         clear_bit(ST_RXSTOP, &portp->state);
2223         set_bit(TTY_IO_ERROR, &tty->flags);
2224         tty->driver_data = (void *) NULL;
2225         portp->tty = (struct tty_struct *) NULL;
2226         portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
2227         portp->refcount = 0;
2228         wake_up_interruptible(&portp->open_wait);
2229 }
2230 
2231 /*****************************************************************************/
2232 
2233 /*
2234  *      Flush characters from the lower buffer. We may not have user context
2235  *      so we cannot sleep waiting for it to complete. Also we need to check
2236  *      if there is chars for this port in the TX cook buffer, and flush them
2237  *      as well.
2238  */
2239 
2240 static void stli_flushbuffer(struct tty_struct *tty)
     /*  */
2241 {
2242         stliport_t      *portp;
2243         stlibrd_t       *brdp;
2244         unsigned long   ftype, flags;
2245 
2246 #if DEBUG
2247         printk("stli_flushbuffer(tty=%x)\n", (int) tty);
2248 #endif
2249 
2250         if (tty == (struct tty_struct *) NULL)
2251                 return;
2252         portp = tty->driver_data;
2253         if (portp == (stliport_t *) NULL)
2254                 return;
2255         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2256                 return;
2257         brdp = stli_brds[portp->brdnr];
2258         if (brdp == (stlibrd_t *) NULL)
2259                 return;
2260 
2261         save_flags(flags);
2262         cli();
2263         if (tty == stli_txcooktty) {
2264                 stli_txcooktty = (struct tty_struct *) NULL;
2265                 stli_txcooksize = 0;
2266                 stli_txcookrealsize = 0;
2267         }
2268         if (test_bit(ST_CMDING, &portp->state)) {
2269                 set_bit(ST_DOFLUSHTX, &portp->state);
2270         } else {
2271                 ftype = FLUSHTX;
2272                 if (test_bit(ST_DOFLUSHRX, &portp->state)) {
2273                         ftype |= FLUSHRX;
2274                         clear_bit(ST_DOFLUSHRX, &portp->state);
2275                 }
2276                 stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(unsigned long), 0);
2277         }
2278         restore_flags(flags);
2279 
2280         wake_up_interruptible(&tty->write_wait);
2281         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
2282                 (tty->ldisc.write_wakeup)(tty);
2283 }
2284 
2285 /*****************************************************************************/
2286 
2287 /*
2288  *      Generic send command routine. This will send a message to the slave,
2289  *      of the specified type with the specified argument. Must be very
2290  *      carefull of data that will be copied out from shared memory -
2291  *      containing command results. The command completion is all done from
2292  *      a poll routine that does not have user coontext. Therefore you cannot
2293  *      copy back directly into user space, or to the kernel stack of a
2294  *      process. This routine does not sleep, so can be called from anywhere.
2295  */
2296 
2297 static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
     /*  */
2298 {
2299         volatile cdkhdr_t       *hdrp;
2300         volatile cdkctrl_t      *cp;
2301         volatile unsigned char  *bits;
2302         unsigned long           flags;
2303 
2304 #if DEBUG
2305         printk("stli_sendcmd(brdp=%x,portp=%x,cmd=%x,arg=%x,size=%d,copyback=%d)\n", (int) brdp, (int) portp, (int) cmd, (int) arg, size, copyback);
2306 #endif
2307 
2308         save_flags(flags);
2309         cli();
2310 
2311         if (test_bit(ST_CMDING, &portp->state)) {
2312                 printk("STALLION: command already busy, cmd=%x!\n", (int) cmd);
2313                 restore_flags(flags);
2314                 return;
2315         }
2316 
2317         EBRDENABLE(brdp);
2318         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
2319         if (size > 0) {
2320                 memcpy((void *) &(cp->args[0]), arg, size);
2321                 if (copyback) {
2322                         portp->argp = arg;
2323                         portp->argsize = size;
2324                 }
2325         }
2326         cp->status = 0;
2327         cp->cmd = cmd;
2328         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2329         hdrp->slavereq |= portp->reqbit;
2330         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
2331         *bits |= portp->portbit;
2332         set_bit(ST_CMDING, &portp->state);
2333         EBRDDISABLE(brdp);
2334         restore_flags(flags);
2335 }
2336 
2337 /*****************************************************************************/
2338 
2339 /*
2340  *      Read data from shared memory. This assumes that the shared memory
2341  *      is enabled and that interrupts are off. Basically we just empty out
2342  *      the shared memory buffer into the tty buffer. Must be carefull to
2343  *      handle the case where we fill up the tty buffer, but still have
2344  *      more chars to unload.
2345  */
2346 
2347 static inline void stli_read(stlibrd_t *brdp, stliport_t *portp)
     /*  */
2348 {
2349         volatile cdkasyrq_t     *rp;
2350         volatile char           *shbuf;
2351         struct tty_struct       *tty;
2352         unsigned int            head, tail, size;
2353         unsigned int            len, stlen;
2354 
2355 #if DEBUG
2356         printk("stli_read(brdp=%x,portp=%d)\n", (int) brdp, (int) portp);
2357 #endif
2358 
2359         if (test_bit(ST_RXSTOP, &portp->state))
2360                 return;
2361         tty = portp->tty;
2362         if (tty == (struct tty_struct *) NULL)
2363                 return;
2364 
2365         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2366         head = (unsigned int) rp->head;
2367         if (head != ((unsigned int) rp->head))
2368                 head = (unsigned int) rp->head;
2369         tail = (unsigned int) rp->tail;
2370         size = portp->rxsize;
2371         if (head >= tail) {
2372                 len = head - tail;
2373                 stlen = len;
2374         } else {
2375                 len = size - (tail - head);
2376                 stlen = size - tail;
2377         }
2378 
2379         len = MIN(len, (TTY_FLIPBUF_SIZE - tty->flip.count));
2380         shbuf = (volatile char *) EBRDGETMEMPTR(brdp, portp->rxoffset);
2381 
2382         while (len > 0) {
2383                 stlen = MIN(len, stlen);
2384                 memcpy(tty->flip.char_buf_ptr, (char *) (shbuf + tail), stlen);
2385                 memset(tty->flip.flag_buf_ptr, 0, stlen);
2386                 tty->flip.char_buf_ptr += stlen;
2387                 tty->flip.flag_buf_ptr += stlen;
2388                 tty->flip.count += stlen;
2389 
2390                 len -= stlen;
2391                 tail += stlen;
2392                 if (tail >= size) {
2393                         tail = 0;
2394                         stlen = head;
2395                 }
2396         }
2397         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2398         rp->tail = tail;
2399 
2400         if (head != tail)
2401                 set_bit(ST_RXING, &portp->state);
2402 
2403         tty_schedule_flip(tty);
2404 }
2405 
2406 /*****************************************************************************/
2407 
2408 /*
2409  *      Set up and carry out any delayed commands. There is only a small set
2410  *      of slave commands that can be done "off-level". So it is not too
2411  *      difficult to deal with them here.
2412  */
2413 
2414 static inline void stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp)
     /*  */
2415 {
2416         int     cmd;
2417 
2418         if (test_bit(ST_DOSIGS, &portp->state)) {
2419                 if (test_bit(ST_DOFLUSHTX, &portp->state) && test_bit(ST_DOFLUSHRX, &portp->state))
2420                         cmd = A_SETSIGNALSF;
2421                 else if (test_bit(ST_DOFLUSHTX, &portp->state))
2422                         cmd = A_SETSIGNALSFTX;
2423                 else if (test_bit(ST_DOFLUSHRX, &portp->state))
2424                         cmd = A_SETSIGNALSFRX;
2425                 else
2426                         cmd = A_SETSIGNALS;
2427                 clear_bit(ST_DOFLUSHTX, &portp->state);
2428                 clear_bit(ST_DOFLUSHRX, &portp->state);
2429                 clear_bit(ST_DOSIGS, &portp->state);
2430                 memcpy((void *) &(cp->args[0]), (void *) &portp->asig, sizeof(asysigs_t));
2431                 cp->status = 0;
2432                 cp->cmd = cmd;
2433                 set_bit(ST_CMDING, &portp->state);
2434         } else if (test_bit(ST_DOFLUSHTX, &portp->state) || test_bit(ST_DOFLUSHRX, &portp->state)) {
2435                 cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
2436                 cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
2437                 clear_bit(ST_DOFLUSHTX, &portp->state);
2438                 clear_bit(ST_DOFLUSHRX, &portp->state);
2439                 memcpy((void *) &(cp->args[0]), (void *) &cmd, sizeof(int));
2440                 cp->status = 0;
2441                 cp->cmd = A_FLUSH;
2442                 set_bit(ST_CMDING, &portp->state);
2443         }
2444 }
2445 
2446 /*****************************************************************************/
2447 
2448 /*
2449  *      Host command service checking. This handles commands or messages
2450  *      coming from the slave to the host. Must have board shared memory
2451  *      enabled and interrupts off when called. Notice that by servicing the
2452  *      read data last we don't need to change the shared memory pointer
2453  *      during processing (which is a slow IO operation).
2454  */
2455 
2456 static inline int stli_hostcmd(stlibrd_t *brdp, int channr)
     /*  */
2457 {
2458         volatile cdkasy_t       *ap;
2459         volatile cdkctrl_t      *cp;
2460         struct tty_struct       *tty;
2461         asynotify_t             nt;
2462         stliport_t              *portp;
2463         unsigned long           oldsigs;
2464         int                     rc, donerx;
2465 
2466 #if DEBUG
2467         printk("stli_hostcmd(brdp=%x,channr=%d)\n", (int) brdp, channr);
2468 #endif
2469 
2470         portp = brdp->ports[(channr - 1)];
2471         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
2472         cp = &ap->ctrl;
2473 
2474 /*
2475  *      Check if we are waiting for an open completion message.
2476  */
2477         if (test_bit(ST_OPENING, &portp->state)) {
2478                 rc = (int) cp->openarg;
2479                 if ((cp->open == 0) && (rc != 0)) {
2480                         if (rc > 0)
2481                                 rc--;
2482                         cp->openarg = 0;
2483                         portp->rc = rc;
2484                         clear_bit(ST_OPENING, &portp->state);
2485                         wake_up_interruptible(&portp->raw_wait);
2486                 }
2487         }
2488 
2489 /*
2490  *      Check if we are waiting for a close completion message.
2491  */
2492         if (test_bit(ST_CLOSING, &portp->state)) {
2493                 rc = (int) cp->closearg;
2494                 if ((cp->close == 0) && (rc != 0)) {
2495                         if (rc > 0)
2496                                 rc--;
2497                         cp->closearg = 0;
2498                         portp->rc = rc;
2499                         clear_bit(ST_CLOSING, &portp->state);
2500                         wake_up_interruptible(&portp->raw_wait);
2501                 }
2502         }
2503 
2504 /*
2505  *      Check if we are waiting for a command completion message. We may
2506  *      need to copy out the command results associated with this command.
2507  */
2508         if (test_bit(ST_CMDING, &portp->state)) {
2509                 rc = cp->status;
2510                 if ((cp->cmd == 0) && (rc != 0)) {
2511                         if (rc > 0)
2512                                 rc--;
2513                         if (portp->argp != (void *) NULL) {
2514                                 memcpy(portp->argp, (void *) &(cp->args[0]), portp->argsize);
2515                                 portp->argp = (void *) NULL;
2516                         }
2517                         cp->status = 0;
2518                         portp->rc = rc;
2519                         clear_bit(ST_CMDING, &portp->state);
2520                         stli_dodelaycmd(portp, cp);
2521                         wake_up_interruptible(&portp->raw_wait);
2522                 }
2523         }
2524 
2525 /*
2526  *      Check for any notification messages ready. This includes lots of
2527  *      different types of events - RX chars ready, RX break received,
2528  *      TX data low or empty in the slave, modem signals changed state.
2529  */
2530         donerx = 0;
2531 
2532         if (ap->notify) {
2533                 nt = ap->changed;
2534                 ap->notify = 0;
2535                 tty = portp->tty;
2536 
2537                 if (nt.signal & SG_DCD) {
2538                         oldsigs = portp->sigs;
2539                         portp->sigs = stli_mktiocm(nt.sigvalue);
2540                         clear_bit(ST_GETSIGS, &portp->state);
2541                         if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
2542                                 wake_up_interruptible(&portp->open_wait);
2543                         if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
2544                                 if (! ((portp->flags & ASYNC_CALLOUT_ACTIVE) &&
2545                                                 (portp->flags & ASYNC_CALLOUT_NOHUP))) {
2546                                         if (tty != (struct tty_struct *) NULL)
2547                                                 queue_task_irq_off(&portp->tqhangup, &tq_scheduler);
2548                                 }
2549                         }
2550                 }
2551 
2552                 if (nt.data & DT_TXEMPTY)
2553                         clear_bit(ST_TXBUSY, &portp->state);
2554                 if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
2555                         if (tty != (struct tty_struct *) NULL) {
2556                                 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
2557                                         (tty->ldisc.write_wakeup)(tty);
2558                                 wake_up_interruptible(&tty->write_wait);
2559                         }
2560                 }
2561 
2562                 if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
2563                         if (tty != (struct tty_struct *) NULL) {
2564                                 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
2565                                         tty->flip.count++;
2566                                         *tty->flip.flag_buf_ptr++ = TTY_BREAK;
2567                                         *tty->flip.char_buf_ptr++ = 0;
2568 #ifndef MODULE
2569                                         if (portp->flags & ASYNC_SAK)
2570                                                 do_SAK(tty);
2571 #endif
2572                                         tty_schedule_flip(tty);
2573                                 }
2574                         }
2575                 }
2576 
2577                 if (nt.data & DT_RXBUSY) {
2578                         donerx++;
2579                         stli_read(brdp, portp);
2580                 }
2581         }
2582 
2583 /*
2584  *      It might seem odd that we are checking for more RX chars here.
2585  *      But, we need to handle the case where the tty buffer was previously
2586  *      filled, but we had more characters to pass up. The slave will not
2587  *      send any more RX notify messages until the RX buffer has been emptied.
2588  *      But it will leave the service bits on (since the buffer is not empty).
2589  *      So from here we can try to process more RX chars.
2590  */
2591         if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
2592                 clear_bit(ST_RXING, &portp->state);
2593                 stli_read(brdp, portp);
2594         }
2595 
2596         return(0);
2597 }
2598 
2599 /*****************************************************************************/
2600 
2601 /*
2602  *      Driver poll routine. This routine polls the boards in use and passes
2603  *      messages back up to host when neccesary. This is actually very
2604  *      CPU efficient, since we will always have the kernel poll clock, it
2605  *      adds only a few cycles when idle (since board service can be
2606  *      determined very easily), but when loaded generates no interrupts
2607  *      (with their expensive associated context change).
2608  */
2609 
2610 static void stli_poll(unsigned long arg)
     /*  */
2611 {
2612         volatile cdkhdr_t       *hdrp;
2613         unsigned char           bits[(STL_MAXCHANS / 8) + 1];
2614         unsigned char           hostreq, slavereq;
2615         stliport_t              *portp;
2616         stlibrd_t               *brdp;
2617         int                     bitpos, bitat, bitsize;
2618         int                     brdnr, channr, nrdevs;
2619 
2620         stli_timerlist.expires = STLI_TIMEOUT;
2621         add_timer(&stli_timerlist);
2622 
2623 /*
2624  *      Check each board and do any servicing required.
2625  */
2626         for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
2627                 brdp = stli_brds[brdnr];
2628                 if (brdp == (stlibrd_t *) NULL)
2629                         continue;
2630                 if ((brdp->state & BST_STARTED) == 0)
2631                         continue;
2632 
2633                 EBRDENABLE(brdp);
2634                 hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2635                 hostreq = hdrp->hostreq;
2636                 slavereq = hdrp->slavereq;
2637                 bitsize = brdp->bitsize;
2638                 nrdevs = brdp->nrdevs;
2639 
2640 /*
2641  *              Check if slave wants any service. Basically we try to do as
2642  *              little work as possible here. There are 2 levels of service
2643  *              bits. So if there is nothing to do we bail early. We check
2644  *              8 service bits at a time in the inner loop, so we can bypass
2645  *              the lot if none of them want service.
2646  */
2647                 if (hostreq) {
2648                         memcpy(&bits[0], (((unsigned char *) hdrp) + brdp->hostoffset), bitsize);
2649 
2650                         for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2651                                 if (bits[bitpos] == 0)
2652                                         continue;
2653                                 channr = bitpos * 8;
2654                                 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
2655                                         if (bits[bitpos] & bitat) {
2656                                                 stli_hostcmd(brdp, channr);
2657                                         }
2658                                 }
2659                         }
2660                 }
2661 
2662 /*
2663  *              Check if any of the out-standing host commands have completed.
2664  *              It is a bit unfortunate that we need to check stuff that we
2665  *              initiated!  This ain't pretty, but it needs to be fast.
2666  */
2667                 if (slavereq) {
2668                         slavereq = 0;
2669                         hostreq = 0;
2670                         memcpy(&bits[0], (((unsigned char *) hdrp) + brdp->slaveoffset), bitsize);
2671 
2672                         for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2673                                 if (bits[bitpos] == 0)
2674                                         continue;
2675                                 channr = bitpos * 8;
2676                                 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
2677                                         if (bits[bitpos] & bitat) {
2678                                                 portp = brdp->ports[(channr - 1)];
2679                                                 if (test_bit(ST_OPENING, &portp->state) ||
2680                                                                 test_bit(ST_CLOSING, &portp->state) ||
2681                                                                 test_bit(ST_CMDING, &portp->state) ||
2682                                                                 test_bit(ST_TXBUSY, &portp->state)) {
2683                                                         slavereq |= portp->reqbit;
2684                                                 } else {
2685                                                         bits[bitpos] &= ~bitat;
2686                                                         hostreq++;
2687                                                 }
2688                                         }
2689                                 }
2690                         }
2691                         hdrp->slavereq = slavereq;
2692                         if (hostreq)
2693                                 memcpy((((unsigned char *) hdrp) + brdp->slaveoffset), &bits[0], bitsize);
2694                 }
2695 
2696                 EBRDDISABLE(brdp);
2697         }
2698 }
2699 
2700 /*****************************************************************************/
2701 
2702 /*
2703  *      Translate the termios settings into the port setting structure of
2704  *      the slave.
2705  */
2706 
2707 static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp)
     /*  */
2708 {
2709 #if DEBUG
2710         printk("stli_mkasyport(portp=%x,pp=%x,tiosp=%d)\n", (int) portp, (int) pp, (int) tiosp);
2711 #endif
2712 
2713         memset(pp, 0, sizeof(asyport_t));
2714 
2715 /*
2716  *      Start of by setting the baud, char size, parity and stop bit info.
2717  */
2718         pp->baudout = tiosp->c_cflag & CBAUD;
2719         if (pp->baudout & CBAUDEX) {
2720                 pp->baudout &= ~CBAUDEX;
2721                 if ((pp->baudout < 1) || (pp->baudout > 2))
2722                         tiosp->c_cflag &= ~CBAUDEX;
2723                 else
2724                         pp->baudout += 15;
2725         }
2726         pp->baudout = stli_baudrates[pp->baudout];
2727         if ((tiosp->c_cflag & CBAUD) == B38400) {
2728                 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2729                         pp->baudout = 57600;
2730                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2731                         pp->baudout = 115200;
2732                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2733                         pp->baudout = (portp->baud_base / portp->custom_divisor);
2734         }
2735         if (pp->baudout > STL_MAXBAUD)
2736                 pp->baudout = STL_MAXBAUD;
2737         pp->baudin = pp->baudout;
2738 
2739         switch (tiosp->c_cflag & CSIZE) {
2740         case CS5:
2741                 pp->csize = 5;
2742                 break;
2743         case CS6:
2744                 pp->csize = 6;
2745                 break;
2746         case CS7:
2747                 pp->csize = 7;
2748                 break;
2749         default:
2750                 pp->csize = 8;
2751                 break;
2752         }
2753 
2754         if (tiosp->c_cflag & CSTOPB)
2755                 pp->stopbs = PT_STOP2;
2756         else
2757                 pp->stopbs = PT_STOP1;
2758 
2759         if (tiosp->c_cflag & PARENB) {
2760                 if (tiosp->c_cflag & PARODD)
2761                         pp->parity = PT_ODDPARITY;
2762                 else
2763                         pp->parity = PT_EVENPARITY;
2764         } else {
2765                 pp->parity = PT_NOPARITY;
2766         }
2767 
2768 /*
2769  *      Set up any flow control options enabled.
2770  */
2771         if (tiosp->c_iflag & IXON) {
2772                 pp->flow |= F_IXON;
2773                 if (tiosp->c_iflag & IXANY)
2774                         pp->flow |= F_IXANY;
2775         }
2776         if (tiosp->c_cflag & CRTSCTS)
2777                 pp->flow |= (F_RTSFLOW | F_CTSFLOW);
2778 
2779         pp->startin = tiosp->c_cc[VSTART];
2780         pp->stopin = tiosp->c_cc[VSTOP];
2781         pp->startout = tiosp->c_cc[VSTART];
2782         pp->stopout = tiosp->c_cc[VSTOP];
2783 
2784 /*
2785  *      Set up the RX char marking mask with those RX error types we must
2786  *      catch. We can get the slave to help us out a little here, it will
2787  *      ignore parity errors and breaks for us, and mark parity errors in
2788  *      the data stream.
2789  */
2790         if (tiosp->c_iflag & IGNPAR)
2791                 pp->iflag |= FI_IGNRXERRS;
2792         if (tiosp->c_iflag & IGNBRK)
2793                 pp->iflag |= FI_IGNBREAK;
2794 
2795         portp->rxmarkmsk = 0;
2796         if (tiosp->c_iflag & (INPCK | PARMRK))
2797                 pp->iflag |= FI_1MARKRXERRS;
2798         if (tiosp->c_iflag & BRKINT)
2799                 portp->rxmarkmsk |= BRKINT;
2800 
2801 /*
2802  *      Transfer any persistent flags into the asyport structure.
2803  */
2804         pp->pflag = portp->pflag;
2805 }
2806 
2807 /*****************************************************************************/
2808 
2809 /*
2810  *      Construct a slave signals structure for setting the DTR and RTS
2811  *      signals as specified.
2812  */
2813 
2814 static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
     /*  */
2815 {
2816 #if DEBUG
2817         printk("stli_mkasysigs(sp=%x,dtr=%d,rts=%d)\n", (int) sp, dtr, rts);
2818 #endif
2819 
2820         memset(sp, 0, sizeof(asysigs_t));
2821         if (dtr >= 0) {
2822                 sp->signal |= SG_DTR;
2823                 sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
2824         }
2825         if (rts >= 0) {
2826                 sp->signal |= SG_RTS;
2827                 sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
2828         }
2829 }
2830 
2831 /*****************************************************************************/
2832 
2833 /*
2834  *      Convert the signals returned from the slave into a local TIOCM type
2835  *      signals value. We keep them localy in TIOCM format.
2836  */
2837 
2838 static long stli_mktiocm(unsigned long sigvalue)
     /*  */
2839 {
2840         long    tiocm;
2841 
2842 #if DEBUG
2843         printk("stli_mktiocm(sigvalue=%x)\n", (int) sigvalue);
2844 #endif
2845 
2846         tiocm = 0;
2847         tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
2848         tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
2849         tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
2850         tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
2851         tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
2852         tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
2853         return(tiocm);
2854 }
2855 
2856 /*****************************************************************************/
2857 
2858 /*
2859  *      All panels and ports actually attached have been worked out. All
2860  *      we need to do here is set up the appropriate per port data structures.
2861  */
2862 
2863 static int stli_initports(stlibrd_t *brdp)
     /*  */
2864 {
2865         stliport_t      *portp;
2866         int             i, panelnr, panelport;
2867 
2868 #if DEBUG
2869         printk("stli_initports(brdp=%x)\n", (int) brdp);
2870 #endif
2871 
2872         for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2873                 portp = (stliport_t *) stli_memalloc(sizeof(stliport_t));
2874                 if (portp == (stliport_t *) NULL) {
2875                         printk("STALLION: failed to allocate port structure\n");
2876                         continue;
2877                 }
2878 
2879                 memset(portp, 0, sizeof(stliport_t));
2880                 portp->portnr = i;
2881                 portp->brdnr = brdp->brdnr;
2882                 portp->panelnr = panelnr;
2883                 portp->baud_base = STL_BAUDBASE;
2884                 portp->close_delay = STL_CLOSEDELAY;
2885                 portp->closing_wait = 30 * HZ;
2886                 portp->tqhangup.routine = stli_dohangup;
2887                 portp->tqhangup.data = portp;
2888                 portp->normaltermios = stli_deftermios;
2889                 portp->callouttermios = stli_deftermios;
2890                 panelport++;
2891                 if (panelport >= brdp->panels[panelnr]) {
2892                         panelport = 0;
2893                         panelnr++;
2894                 }
2895                 brdp->ports[i] = portp;
2896         }
2897 
2898         return(0);
2899 }
2900 
2901 /*****************************************************************************/
2902 
2903 /*
2904  *      All the following routines are board specific hardware operations.
2905  */
2906 
2907 static void stli_ecpinit(stlibrd_t *brdp)
     /*  */
2908 {
2909         unsigned long   memconf;
2910 
2911 #if DEBUG
2912         printk("stli_ecpinit(brdp=%d)\n", (int) brdp);
2913 #endif
2914 
2915         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2916         udelay(10);
2917         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2918         udelay(100);
2919 
2920         memconf = (brdp->memaddr & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
2921         outb(memconf, (brdp->iobase + ECP_ATMEMAR));
2922 }
2923 
2924 /*****************************************************************************/
2925 
2926 static void stli_ecpenable(stlibrd_t *brdp)
     /*  */
2927 {       
2928 #if DEBUG
2929         printk("stli_ecpenable(brdp=%x)\n", (int) brdp);
2930 #endif
2931         outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
2932 }
2933 
2934 /*****************************************************************************/
2935 
2936 static void stli_ecpdisable(stlibrd_t *brdp)
     /*  */
2937 {       
2938 #if DEBUG
2939         printk("stli_ecpdisable(brdp=%x)\n", (int) brdp);
2940 #endif
2941         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2942 }
2943 
2944 /*****************************************************************************/
2945 
2946 static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
2947 {       
2948         void            *ptr;
2949         unsigned char   val;
2950 
2951 #if DEBUG
2952         printk("stli_ecpgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
2953 #endif
2954 
2955         if (offset > brdp->memsize) {
2956                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
2957                 ptr = 0;
2958                 val = 0;
2959         } else {
2960                 ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
2961                 val = (unsigned char) (offset / ECP_ATPAGESIZE);
2962         }
2963         outb(val, (brdp->iobase + ECP_ATMEMPR));
2964         return(ptr);
2965 }
2966 
2967 /*****************************************************************************/
2968 
2969 static void stli_ecpreset(stlibrd_t *brdp)
     /*  */
2970 {       
2971 #if DEBUG
2972         printk("stli_ecpreset(brdp=%x)\n", (int) brdp);
2973 #endif
2974 
2975         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2976         udelay(10);
2977         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2978         udelay(500);
2979 }
2980 
2981 /*****************************************************************************/
2982 
2983 static void stli_ecpintr(stlibrd_t *brdp)
     /*  */
2984 {       
2985 #if DEBUG
2986         printk("stli_ecpintr(brdp=%x)\n", (int) brdp);
2987 #endif
2988         outb(0x1, brdp->iobase);
2989 }
2990 
2991 /*****************************************************************************/
2992 
2993 /*
2994  *      The following set of functions act on ECP EISA boards.
2995  */
2996 
2997 static void stli_ecpeiinit(stlibrd_t *brdp)
     /*  */
2998 {
2999         unsigned long   memconf;
3000 
3001 #if DEBUG
3002         printk("stli_ecpeiinit(brdp=%x)\n", (int) brdp);
3003 #endif
3004 
3005         outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
3006         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3007         udelay(10);
3008         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3009         udelay(500);
3010 
3011         memconf = (brdp->memaddr & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
3012         outb(memconf, (brdp->iobase + ECP_EIMEMARL));
3013         memconf = (brdp->memaddr & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
3014         outb(memconf, (brdp->iobase + ECP_EIMEMARH));
3015 }
3016 
3017 /*****************************************************************************/
3018 
3019 static void stli_ecpeienable(stlibrd_t *brdp)
     /*  */
3020 {       
3021         outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
3022 }
3023 
3024 /*****************************************************************************/
3025 
3026 static void stli_ecpeidisable(stlibrd_t *brdp)
     /*  */
3027 {       
3028         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3029 }
3030 
3031 /*****************************************************************************/
3032 
3033 static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3034 {       
3035         void            *ptr;
3036         unsigned char   val;
3037 
3038 #if DEBUG
3039         printk("stli_ecpeigetmemptr(brdp=%x,offset=%x,line=%d)\n", (int) brdp, (int) offset, line);
3040 #endif
3041 
3042         if (offset > brdp->memsize) {
3043                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3044                 ptr = 0;
3045                 val = 0;
3046         } else {
3047                 ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
3048                 if (offset < ECP_EIPAGESIZE)
3049                         val = ECP_EIENABLE;
3050                 else
3051                         val = ECP_EIENABLE | 0x40;
3052         }
3053         outb(val, (brdp->iobase + ECP_EICONFR));
3054         return(ptr);
3055 }
3056 
3057 /*****************************************************************************/
3058 
3059 static void stli_ecpeireset(stlibrd_t *brdp)
     /*  */
3060 {       
3061         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3062         udelay(10);
3063         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3064         udelay(500);
3065 }
3066 
3067 /*****************************************************************************/
3068 
3069 /*
3070  *      The following set of functions act on ECP MCA boards.
3071  */
3072 
3073 static void stli_ecpmcenable(stlibrd_t *brdp)
     /*  */
3074 {       
3075         outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
3076 }
3077 
3078 /*****************************************************************************/
3079 
3080 static void stli_ecpmcdisable(stlibrd_t *brdp)
     /*  */
3081 {       
3082         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3083 }
3084 
3085 /*****************************************************************************/
3086 
3087 static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3088 {       
3089         void            *ptr;
3090         unsigned char   val;
3091 
3092         if (offset > brdp->memsize) {
3093                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3094                 ptr = 0;
3095                 val = 0;
3096         } else {
3097                 ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
3098                 val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
3099         }
3100         outb(val, (brdp->iobase + ECP_MCCONFR));
3101         return(ptr);
3102 }
3103 
3104 /*****************************************************************************/
3105 
3106 static void stli_ecpmcreset(stlibrd_t *brdp)
     /*  */
3107 {       
3108         outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
3109         udelay(10);
3110         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3111         udelay(500);
3112 }
3113 
3114 /*****************************************************************************/
3115 
3116 /*
3117  *      The following routines act on ONboards.
3118  */
3119 
3120 static void stli_onbinit(stlibrd_t *brdp)
     /*  */
3121 {
3122         unsigned long   memconf;
3123         int             i;
3124 
3125 #if DEBUG
3126         printk("stli_onbinit(brdp=%d)\n", (int) brdp);
3127 #endif
3128 
3129         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3130         udelay(10);
3131         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3132         for (i = 0; (i < 1000); i++)
3133                 udelay(1000);
3134 
3135         memconf = (brdp->memaddr & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
3136         outb(memconf, (brdp->iobase + ONB_ATMEMAR));
3137         outb(0x1, brdp->iobase);
3138         udelay(1000);
3139 }
3140 
3141 /*****************************************************************************/
3142 
3143 static void stli_onbenable(stlibrd_t *brdp)
     /*  */
3144 {       
3145 #if DEBUG
3146         printk("stli_onbenable(brdp=%x)\n", (int) brdp);
3147 #endif
3148         outb((ONB_ATENABLE | ONB_HIMEMENAB), (brdp->iobase + ONB_ATCONFR));
3149 }
3150 
3151 /*****************************************************************************/
3152 
3153 static void stli_onbdisable(stlibrd_t *brdp)
     /*  */
3154 {       
3155 #if DEBUG
3156         printk("stli_onbdisable(brdp=%x)\n", (int) brdp);
3157 #endif
3158         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3159 }
3160 
3161 /*****************************************************************************/
3162 
3163 static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3164 {       
3165         void    *ptr;
3166 
3167 #if DEBUG
3168         printk("stli_onbgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3169 #endif
3170 
3171         if (offset > brdp->memsize) {
3172                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3173                 ptr = 0;
3174         } else {
3175                 ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
3176         }
3177         return(ptr);
3178 }
3179 
3180 /*****************************************************************************/
3181 
3182 static void stli_onbreset(stlibrd_t *brdp)
     /*  */
3183 {       
3184         int     i;
3185 
3186 #if DEBUG
3187         printk("stli_onbreset(brdp=%x)\n", (int) brdp);
3188 #endif
3189 
3190         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3191         udelay(10);
3192         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3193         for (i = 0; (i < 1000); i++)
3194                 udelay(1000);
3195 }
3196 
3197 /*****************************************************************************/
3198 
3199 /*
3200  *      The following routines act on ONboard EISA.
3201  */
3202 
3203 static void stli_onbeinit(stlibrd_t *brdp)
     /*  */
3204 {
3205         unsigned long   memconf;
3206         int             i;
3207 
3208 #if DEBUG
3209         printk("stli_onbeinit(brdp=%d)\n", (int) brdp);
3210 #endif
3211 
3212         outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3213         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3214         udelay(10);
3215         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3216         for (i = 0; (i < 1000); i++)
3217                 udelay(1000);
3218 
3219         memconf = (brdp->memaddr & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
3220         outb(memconf, (brdp->iobase + ONB_EIMEMARL));
3221         memconf = (brdp->memaddr & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
3222         outb(memconf, (brdp->iobase + ONB_EIMEMARH));
3223         outb(0x1, brdp->iobase);
3224         udelay(1000);
3225 }
3226 
3227 /*****************************************************************************/
3228 
3229 static void stli_onbeenable(stlibrd_t *brdp)
     /*  */
3230 {       
3231 #if DEBUG
3232         printk("stli_onbeenable(brdp=%x)\n", (int) brdp);
3233 #endif
3234         outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
3235 }
3236 
3237 /*****************************************************************************/
3238 
3239 static void stli_onbedisable(stlibrd_t *brdp)
     /*  */
3240 {       
3241 #if DEBUG
3242         printk("stli_onbedisable(brdp=%x)\n", (int) brdp);
3243 #endif
3244         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3245 }
3246 
3247 /*****************************************************************************/
3248 
3249 static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3250 {       
3251         void            *ptr;
3252         unsigned char   val;
3253 
3254 #if DEBUG
3255         printk("stli_onbegetmemptr(brdp=%x,offset=%x,line=%d)\n", (int) brdp, (int) offset, line);
3256 #endif
3257 
3258         if (offset > brdp->memsize) {
3259                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3260                 ptr = 0;
3261                 val = 0;
3262         } else {
3263                 ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
3264                 if (offset < ONB_EIPAGESIZE)
3265                         val = ONB_EIENABLE;
3266                 else
3267                         val = ONB_EIENABLE | 0x40;
3268         }
3269         outb(val, (brdp->iobase + ONB_EICONFR));
3270         return(ptr);
3271 }
3272 
3273 /*****************************************************************************/
3274 
3275 static void stli_onbereset(stlibrd_t *brdp)
     /*  */
3276 {       
3277         int     i;
3278 
3279 #if DEBUG
3280         printk("stli_onbereset(brdp=%x)\n", (int) brdp);
3281 #endif
3282 
3283         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3284         udelay(10);
3285         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3286         for (i = 0; (i < 1000); i++)
3287                 udelay(1000);
3288 }
3289 
3290 /*****************************************************************************/
3291 
3292 /*
3293  *      The following routines act on Brumby boards.
3294  */
3295 
3296 static void stli_bbyinit(stlibrd_t *brdp)
     /*  */
3297 {
3298         int     i;
3299 
3300 #if DEBUG
3301         printk("stli_bbyinit(brdp=%d)\n", (int) brdp);
3302 #endif
3303 
3304         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3305         udelay(10);
3306         outb(0, (brdp->iobase + BBY_ATCONFR));
3307         for (i = 0; (i < 1000); i++)
3308                 udelay(1000);
3309         outb(0x1, brdp->iobase);
3310         udelay(1000);
3311 }
3312 
3313 /*****************************************************************************/
3314 
3315 static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3316 {       
3317         void            *ptr;
3318         unsigned char   val;
3319 
3320 #if DEBUG
3321         printk("stli_bbygetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3322 #endif
3323 
3324         if (offset > brdp->memsize) {
3325                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3326                 ptr = 0;
3327                 val = 0;
3328         } else {
3329                 ptr = brdp->membase + (offset % BBY_PAGESIZE);
3330                 val = (unsigned char) (offset / BBY_PAGESIZE);
3331         }
3332         outb(val, (brdp->iobase + BBY_ATCONFR));
3333         return(ptr);
3334 }
3335 
3336 /*****************************************************************************/
3337 
3338 static void stli_bbyreset(stlibrd_t *brdp)
     /*  */
3339 {       
3340         int     i;
3341 
3342 #if DEBUG
3343         printk("stli_bbyreset(brdp=%x)\n", (int) brdp);
3344 #endif
3345 
3346         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3347         udelay(10);
3348         outb(0, (brdp->iobase + BBY_ATCONFR));
3349         for (i = 0; (i < 1000); i++)
3350                 udelay(1000);
3351 }
3352 
3353 /*****************************************************************************/
3354 
3355 /*
3356  *      The following routines act on original old Stallion boards.
3357  */
3358 
3359 static void stli_stalinit(stlibrd_t *brdp)
     /*  */
3360 {
3361         int     i;
3362 
3363 #if DEBUG
3364         printk("stli_stalinit(brdp=%d)\n", (int) brdp);
3365 #endif
3366 
3367         outb(0x1, brdp->iobase);
3368         for (i = 0; (i < 1000); i++)
3369                 udelay(1000);
3370 }
3371 
3372 /*****************************************************************************/
3373 
3374 static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3375 {       
3376         void    *ptr;
3377 
3378 #if DEBUG
3379         printk("stli_stalgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3380 #endif
3381 
3382         if (offset > brdp->memsize) {
3383                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3384                 ptr = 0;
3385         } else {
3386                 ptr = brdp->membase + (offset % STAL_PAGESIZE);
3387         }
3388         return(ptr);
3389 }
3390 
3391 /*****************************************************************************/
3392 
3393 static void stli_stalreset(stlibrd_t *brdp)
     /*  */
3394 {       
3395         volatile unsigned long  *vecp;
3396         int                     i;
3397 
3398 #if DEBUG
3399         printk("stli_stalreset(brdp=%x)\n", (int) brdp);
3400 #endif
3401 
3402         vecp = (volatile unsigned long *) (brdp->membase + 0x30);
3403         *vecp = 0xffff0000;
3404         outb(0, brdp->iobase);
3405         for (i = 0; (i < 1000); i++)
3406                 udelay(1000);
3407 }
3408 
3409 /*****************************************************************************/
3410 
3411 #if STLI_HIMEMORY
3412  
3413 #define PAGE_IOMEM      __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_PCD)
3414 
3415 /*
3416  *      To support shared memory addresses outside of the lower 1 Mb region
3417  *      we will need to pull some tricks with memory management to map the
3418  *      higher range into kernel virtual address space... Radical stuff...
3419  */
3420 
3421 static void *stli_mapbrdmem(unsigned long physaddr, unsigned int size)
     /*  */
3422 {
3423         void    *virtaddr;
3424         int     rc;
3425 
3426 #if DEBUG
3427         printk("stli_mapbrdmem(physaddr=%x,size=%x)\n", (int) physaddr, size);
3428 #endif
3429 
3430         if ((virtaddr = vmalloc(size)) == (char *) NULL) {
3431                 printk("STALLION: failed to allocate virtual address space, size=%x\n", size);
3432                 return((void *) NULL);
3433         }
3434         if ((rc = remap_page_range((TASK_SIZE + ((unsigned long) virtaddr)), physaddr, size, PAGE_IOMEM))) {
3435                 printk("STALLION: failed to map phyiscal address=%x, errno=%d\n", (int) physaddr, rc);
3436                 return((void *) NULL);
3437         }
3438         return(virtaddr);
3439 }
3440 
3441 #endif
3442 
3443 /*****************************************************************************/
3444 
3445 /*
3446  *      Try to find an ECP board and initialize it. This handles only ECP
3447  *      board types.
3448  */
3449 
3450 static int stli_initecp(stlibrd_t *brdp)
     /*  */
3451 {
3452         cdkecpsig_t     sig;
3453         cdkecpsig_t     *sigsp;
3454         unsigned int    status, nxtid;
3455         int             panelnr;
3456 
3457 #if DEBUG
3458         printk("stli_initecp(brdp=%x)\n", (int) brdp);
3459 #endif
3460 
3461 /*
3462  *      Do a basic sanity check on the IO and memory addresses.
3463  */
3464         if ((brdp->iobase == 0) || (brdp->memaddr == 0))
3465                 return(-ENODEV);
3466 
3467 /*
3468  *      Based on the specific board type setup the common vars to access
3469  *      and enable shared memory. Set all board specific information now
3470  *      as well.
3471  */
3472         switch (brdp->brdtype) {
3473         case BRD_ECP:
3474                 brdp->membase = (void *) brdp->memaddr;
3475                 brdp->memsize = ECP_MEMSIZE;
3476                 brdp->pagesize = ECP_ATPAGESIZE;
3477                 brdp->init = stli_ecpinit;
3478                 brdp->enable = stli_ecpenable;
3479                 brdp->reenable = stli_ecpenable;
3480                 brdp->disable = stli_ecpdisable;
3481                 brdp->getmemptr = stli_ecpgetmemptr;
3482                 brdp->intr = stli_ecpintr;
3483                 brdp->reset = stli_ecpreset;
3484                 break;
3485 
3486         case BRD_ECPE:
3487                 brdp->membase = (void *) brdp->memaddr;
3488                 brdp->memsize = ECP_MEMSIZE;
3489                 brdp->pagesize = ECP_EIPAGESIZE;
3490                 brdp->init = stli_ecpeiinit;
3491                 brdp->enable = stli_ecpeienable;
3492                 brdp->reenable = stli_ecpeienable;
3493                 brdp->disable = stli_ecpeidisable;
3494                 brdp->getmemptr = stli_ecpeigetmemptr;
3495                 brdp->intr = stli_ecpintr;
3496                 brdp->reset = stli_ecpeireset;
3497                 break;
3498 
3499         case BRD_ECPMC:
3500                 brdp->membase = (void *) brdp->memaddr;
3501                 brdp->memsize = ECP_MEMSIZE;
3502                 brdp->pagesize = ECP_MCPAGESIZE;
3503                 brdp->init = NULL;
3504                 brdp->enable = stli_ecpmcenable;
3505                 brdp->reenable = stli_ecpmcenable;
3506                 brdp->disable = stli_ecpmcdisable;
3507                 brdp->getmemptr = stli_ecpmcgetmemptr;
3508                 brdp->intr = stli_ecpintr;
3509                 brdp->reset = stli_ecpmcreset;
3510                 break;
3511 
3512         default:
3513                 return(-EINVAL);
3514         }
3515 
3516 /*
3517  *      The per-board operations structure is all setup, so now lets go
3518  *      and get the board operational. Firstly initialize board configuration
3519  *      registers. Then if we are using the higher 1Mb support then set up
3520  *      the memory mapping info so we can get at the boards shared memory.
3521  */
3522         EBRDINIT(brdp);
3523 
3524 #if STLI_HIMEMORY
3525         if (brdp->memaddr > 0x100000) {
3526                 brdp->membase = stli_mapbrdmem(brdp->memaddr, brdp->memsize);
3527                 if (brdp->membase == (void *) NULL)
3528                         return(-ENOMEM);
3529         }
3530 #endif
3531 
3532 /*
3533  *      Now that all specific code is set up, enable the shared memory and
3534  *      look for the a signature area that will tell us exactly what board
3535  *      this is, and what it is connected to it.
3536  */
3537         EBRDENABLE(brdp);
3538         sigsp = (cdkecpsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3539         memcpy(&sig, sigsp, sizeof(cdkecpsig_t));
3540         EBRDDISABLE(brdp);
3541 
3542 #if 0
3543         printk("%s(%d): sig-> magic=%x romver=%x panel=%x,%x,%x,%x,%x,%x,%x,%x\n",
3544                 __FILE__, __LINE__, (int) sig.magic, sig.romver, sig.panelid[0],
3545                 (int) sig.panelid[1], (int) sig.panelid[2], (int) sig.panelid[3],
3546                 (int) sig.panelid[4], (int) sig.panelid[5], (int) sig.panelid[6],
3547                 (int) sig.panelid[7]);
3548 #endif
3549 
3550         if (sig.magic != ECP_MAGIC)
3551                 return(-ENODEV);
3552 
3553 /*
3554  *      Scan through the signature looking at the panels connected to the
3555  *      board. Calculate the total number of ports as we go.
3556  */
3557         for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
3558                 status = sig.panelid[nxtid];
3559                 if ((status & ECH_PNLIDMASK) != nxtid)
3560                         break;
3561                 if (status & ECH_PNL16PORT) {
3562                         brdp->panels[panelnr] = 16;
3563                         brdp->nrports += 16;
3564                         nxtid += 2;
3565                 } else {
3566                         brdp->panels[panelnr] = 8;
3567                         brdp->nrports += 8;
3568                         nxtid++;
3569                 }
3570                 brdp->panelids[panelnr] = status;
3571                 brdp->nrpanels++;
3572         }
3573 
3574         request_region(brdp->iobase, ECP_IOSIZE, "serial(ECP)");
3575         brdp->state |= BST_FOUND;
3576         return(0);
3577 }
3578 
3579 /*****************************************************************************/
3580 
3581 /*
3582  *      Try to find an ONboard, Brumby or Stallion board and initialize it.
3583  *      This handles only these board types.
3584  */
3585 
3586 static int stli_initonb(stlibrd_t *brdp)
     /*  */
3587 {
3588         cdkonbsig_t     sig;
3589         cdkonbsig_t     *sigsp;
3590         int             i;
3591 
3592 #if DEBUG
3593         printk("stli_initonb(brdp=%x)\n", (int) brdp);
3594 #endif
3595 
3596 /*
3597  *      Do a basic sanity check on the IO and memory addresses.
3598  */
3599         if ((brdp->iobase == 0) || (brdp->memaddr == 0))
3600                 return(-ENODEV);
3601 
3602 /*
3603  *      Based on the specific board type setup the common vars to access
3604  *      and enable shared memory. Set all board specific information now
3605  *      as well.
3606  */
3607         switch (brdp->brdtype) {
3608         case BRD_ONBOARD:
3609         case BRD_ONBOARD32:
3610         case BRD_ONBOARD2:
3611         case BRD_ONBOARD2_32:
3612         case BRD_ONBOARDRS:
3613                 brdp->membase = (void *) brdp->memaddr;
3614                 brdp->memsize = ONB_MEMSIZE;
3615                 brdp->pagesize = ONB_ATPAGESIZE;
3616                 brdp->init = stli_onbinit;
3617                 brdp->enable = stli_onbenable;
3618                 brdp->reenable = stli_onbenable;
3619                 brdp->disable = stli_onbdisable;
3620                 brdp->getmemptr = stli_onbgetmemptr;
3621                 brdp->intr = stli_ecpintr;
3622                 brdp->reset = stli_onbreset;
3623                 break;
3624 
3625         case BRD_ONBOARDE:
3626                 brdp->membase = (void *) brdp->memaddr;
3627                 brdp->memsize = ONB_EIMEMSIZE;
3628                 brdp->pagesize = ONB_EIPAGESIZE;
3629                 brdp->init = stli_onbeinit;
3630                 brdp->enable = stli_onbeenable;
3631                 brdp->reenable = stli_onbeenable;
3632                 brdp->disable = stli_onbedisable;
3633                 brdp->getmemptr = stli_onbegetmemptr;
3634                 brdp->intr = stli_ecpintr;
3635                 brdp->reset = stli_onbereset;
3636                 break;
3637 
3638         case BRD_BRUMBY4:
3639         case BRD_BRUMBY8:
3640         case BRD_BRUMBY16:
3641                 brdp->membase = (void *) brdp->memaddr;
3642                 brdp->memsize = BBY_MEMSIZE;
3643                 brdp->pagesize = BBY_PAGESIZE;
3644                 brdp->init = stli_bbyinit;
3645                 brdp->enable = NULL;
3646                 brdp->reenable = NULL;
3647                 brdp->disable = NULL;
3648                 brdp->getmemptr = stli_bbygetmemptr;
3649                 brdp->intr = stli_ecpintr;
3650                 brdp->reset = stli_bbyreset;
3651                 break;
3652 
3653         case BRD_STALLION:
3654                 brdp->membase = (void *) brdp->memaddr;
3655                 brdp->memsize = STAL_MEMSIZE;
3656                 brdp->pagesize = STAL_PAGESIZE;
3657                 brdp->init = stli_stalinit;
3658                 brdp->enable = NULL;
3659                 brdp->reenable = NULL;
3660                 brdp->disable = NULL;
3661                 brdp->getmemptr = stli_stalgetmemptr;
3662                 brdp->intr = stli_ecpintr;
3663                 brdp->reset = stli_stalreset;
3664                 break;
3665 
3666         default:
3667                 return(-EINVAL);
3668         }
3669 
3670 /*
3671  *      The per-board operations structure is all setup, so now lets go
3672  *      and get the board operational. Firstly initialize board configuration
3673  *      registers. Then if we are using the higher 1Mb support then set up
3674  *      the memory mapping info so we can get at the boards shared memory.
3675  */
3676         EBRDINIT(brdp);
3677 
3678 #if STLI_HIMEMORY
3679         if (brdp->memaddr > 0x100000) {
3680                 brdp->membase = stli_mapbrdmem(brdp->memaddr, brdp->memsize);
3681                 if (brdp->membase == (void *) NULL)
3682                         return(-ENOMEM);
3683         }
3684 #endif
3685 
3686 /*
3687  *      Now that all specific code is set up, enable the shared memory and
3688  *      look for the a signature area that will tell us exactly what board
3689  *      this is, and how many ports.
3690  */
3691         EBRDENABLE(brdp);
3692         sigsp = (cdkonbsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3693         memcpy(&sig, sigsp, sizeof(cdkonbsig_t));
3694         EBRDDISABLE(brdp);
3695 
3696 #if 0
3697         printk("%s(%d): sig-> magic=%x:%x:%x:%x romver=%x amask=%x:%x:%x\n",
3698                 __FILE__, __LINE__, sig.magic0, sig.magic1, sig.magic2,
3699                 sig.magic3, sig.romver, sig.amask0, sig.amask1, sig.amask2);
3700 #endif
3701 
3702         if ((sig.magic0 != ONB_MAGIC0) || (sig.magic1 != ONB_MAGIC1) ||
3703                         (sig.magic2 != ONB_MAGIC2) || (sig.magic3 != ONB_MAGIC3))
3704                 return(-ENODEV);
3705 
3706 /*
3707  *      Scan through the signature alive mask and calculate how many ports
3708  *      there are on this board.
3709  */
3710         brdp->nrpanels = 1;
3711         if (sig.amask1) {
3712                 brdp->nrports = 32;
3713         } else {
3714                 for (i = 0; (i < 16); i++) {
3715                         if (((sig.amask0 << i) & 0x8000) == 0)
3716                                 break;
3717                 }
3718                 brdp->nrports = i;
3719         }
3720         brdp->panels[0] = brdp->nrports;
3721 
3722         request_region(brdp->iobase, ONB_IOSIZE, "serial(ONB/BBY)");
3723         brdp->state |= BST_FOUND;
3724         return(0);
3725 }
3726 
3727 /*****************************************************************************/
3728 
3729 /*
3730  *      Start up a running board. This routine is only called after the
3731  *      code has been down loaded to the board and is operational. It will
3732  *      read in the memory map, and get the show on the road...
3733  */
3734 
3735 static int stli_startbrd(stlibrd_t *brdp)
     /*  */
3736 {
3737         volatile cdkhdr_t       *hdrp;
3738         volatile cdkmem_t       *memp;
3739         volatile cdkasy_t       *ap;
3740         unsigned long           flags;
3741         stliport_t              *portp;
3742         int                     portnr, nrdevs, i, rc;
3743 
3744 #if DEBUG
3745         printk("stli_startbrd(brdp=%x)\n", (int) brdp);
3746 #endif
3747 
3748         rc = 0;
3749 
3750         save_flags(flags);
3751         cli();
3752         EBRDENABLE(brdp);
3753         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
3754         nrdevs = hdrp->nrdevs;
3755 
3756 #if 0
3757         printk("%s(%d): CDK version %d.%d.%d --> nrdevs=%d memp=%x hostp=%x slavep=%x\n",
3758                  __FILE__, __LINE__, hdrp->ver_release, hdrp->ver_modification,
3759                  hdrp->ver_fix, nrdevs, (int) hdrp->memp, (int) hdrp->hostp,
3760                  (int) hdrp->slavep);
3761 #endif
3762 
3763         if (nrdevs < (brdp->nrports + 1)) {
3764                 printk("STALLION: slave failed to allocate memory for all devices, devices=%d\n", nrdevs);
3765                 brdp->nrports = nrdevs - 1;
3766         }
3767         brdp->nrdevs = nrdevs;
3768         brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
3769         brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
3770         brdp->bitsize = (nrdevs + 7) / 8;
3771         memp = (volatile cdkmem_t *) hdrp->memp;
3772         if (((unsigned long) memp) > brdp->memsize) {
3773                 printk("STALLION: corrupted shared memory region?\n");
3774                 rc = -EIO;
3775                 goto stli_donestartup;
3776         }
3777         memp = (volatile cdkmem_t *) EBRDGETMEMPTR(brdp, (unsigned long) memp);
3778         if (memp->dtype != TYP_ASYNCTRL) {
3779                 printk("STALLION: no slave control device found\n");
3780                 goto stli_donestartup;
3781         }
3782         memp++;
3783 
3784 /*
3785  *      Cycle through memory allocation of each port. We are guaranteed to
3786  *      have all ports inside the first page of slave window, so no need to
3787  *      change pages while reading memory map.
3788  */
3789         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
3790                 if (memp->dtype != TYP_ASYNC)
3791                         break;
3792                 portp = brdp->ports[portnr];
3793                 if (portp == (stliport_t *) NULL)
3794                         break;
3795                 portp->devnr = i;
3796                 portp->addr = memp->offset;
3797                 portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
3798                 portp->portidx = (unsigned char) (i / 8);
3799                 portp->portbit = (unsigned char) (0x1 << (i % 8));
3800         }
3801 
3802 /*
3803  *      For each port setup a local copy of the RX and TX buffer offsets
3804  *      and sizes. We do this separate from the above, because we need to
3805  *      move the shared memory page...
3806  */
3807         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
3808                 portp = brdp->ports[portnr];
3809                 if (portp == (stliport_t *) NULL)
3810                         break;
3811                 if (portp->addr == 0)
3812                         break;
3813                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
3814                 if (ap != (volatile cdkasy_t *) NULL) {
3815                         portp->rxsize = ap->rxq.size;
3816                         portp->txsize = ap->txq.size;
3817                         portp->rxoffset = ap->rxq.offset;
3818                         portp->txoffset = ap->txq.offset;
3819                 }
3820         }
3821 
3822 stli_donestartup:
3823         EBRDDISABLE(brdp);
3824         restore_flags(flags);
3825 
3826         if (rc == 0)
3827                 brdp->state |= BST_STARTED;
3828 
3829         if (! stli_timeron) {
3830                 stli_timeron++;
3831                 stli_timerlist.expires = STLI_TIMEOUT;
3832                 add_timer(&stli_timerlist);
3833         }
3834 
3835         return(rc);
3836 }
3837 
3838 /*****************************************************************************/
3839 
3840 /*
3841  *      Probe and initialize the specified board.
3842  */
3843 
3844 static int stli_brdinit(stlibrd_t *brdp)
     /*  */
3845 {
3846 #if DEBUG
3847         printk("stli_brdinit(brdp=%x)\n", (int) brdp);
3848 #endif
3849 
3850         stli_brds[brdp->brdnr] = brdp;
3851 
3852         switch (brdp->brdtype) {
3853         case BRD_ECP:
3854         case BRD_ECPE:
3855         case BRD_ECPMC:
3856                 stli_initecp(brdp);
3857                 break;
3858         case BRD_ONBOARD:
3859         case BRD_ONBOARDE:
3860         case BRD_ONBOARD2:
3861         case BRD_ONBOARD32:
3862         case BRD_ONBOARD2_32:
3863         case BRD_ONBOARDRS:
3864         case BRD_BRUMBY4:
3865         case BRD_BRUMBY8:
3866         case BRD_BRUMBY16:
3867         case BRD_STALLION:
3868                 stli_initonb(brdp);
3869                 break;
3870         case BRD_EASYIO:
3871         case BRD_ECH:
3872         case BRD_ECHMC:
3873         case BRD_ECHPCI:
3874                 printk("STALLION: %s board type not supported in this driver\n", stli_brdnames[brdp->brdtype]);
3875                 return(ENODEV);
3876         default:
3877                 printk("STALLION: unit=%d is unknown board type=%d\n", brdp->brdnr, brdp->brdtype);
3878                 return(ENODEV);
3879         }
3880 
3881         if ((brdp->state & BST_FOUND) == 0) {
3882                 printk("STALLION: %s board not found, unit=%d io=%x mem=%x\n", stli_brdnames[brdp->brdtype], brdp->brdnr, brdp->iobase, (int) brdp->memaddr);
3883                 return(ENODEV);
3884         }
3885 
3886         stli_initports(brdp);
3887         printk("STALLION: %s found, unit=%d io=%x mem=%x nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype], brdp->brdnr, brdp->iobase, (int) brdp->memaddr, brdp->nrpanels, brdp->nrports);
3888         return(0);
3889 }
3890 
3891 /*****************************************************************************/
3892 
3893 /*
3894  *      Probe around trying to find where the EISA boards shared memory
3895  *      might be. This is a bit if hack, but it is the best we can do.
3896  */
3897 
3898 static int stli_eisamemprobe(stlibrd_t *brdp)
     /*  */
3899 {
3900         cdkecpsig_t     ecpsig, *ecpsigp;
3901         cdkonbsig_t     onbsig, *onbsigp;
3902         int             i, foundit;
3903 
3904 #if DEBUG
3905         printk("stli_eisamemprobe(brdp=%x)\n", (int) brdp);
3906 #endif
3907 
3908 /*
3909  *      First up we reset the board, to get it into a known state. There
3910  *      is only 2 board types here we need to worry about. Don;t use the
3911  *      standard board init routine here, it programs up the shared
3912  *      memopry address, and we don't know it yet...
3913  */
3914         if (brdp->brdtype == BRD_ECPE) {
3915                 outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
3916                 outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
3917                 udelay(10);
3918                 outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
3919                 udelay(500);
3920                 stli_ecpeienable(brdp);
3921         } else if (brdp->brdtype == BRD_ONBOARDE) {
3922                 outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3923                 outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3924                 udelay(10);
3925                 outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3926                 for (i = 0; (i < 100); i++)
3927                         udelay(1000);
3928                 outb(0x1, brdp->iobase);
3929                 udelay(1000);
3930                 stli_onbeenable(brdp);
3931         } else {
3932                 return(-ENODEV);
3933         }
3934 
3935         foundit = 0;
3936         brdp->memsize = ECP_MEMSIZE;
3937 
3938 /*
3939  *      Board shared memory is enabled, so now we have a poke around and
3940  *      see if we can find it.
3941  */
3942         for (i = 0; (i < stli_eisamempsize); i++) {
3943                 brdp->memaddr = stli_eisamemprobeaddrs[i];
3944                 brdp->membase = (void *) brdp->memaddr;
3945 #if STLI_HIMEMORY
3946                 if (brdp->memaddr > 0x100000) {
3947                         brdp->membase = stli_mapbrdmem(brdp->memaddr, brdp->memsize);
3948                         if (brdp->membase == (void *) NULL)
3949                                 continue;
3950                 }
3951 #endif
3952                 if (brdp->brdtype == BRD_ECPE) {
3953                         ecpsigp = (cdkecpsig_t *) stli_ecpeigetmemptr(brdp, CDK_SIGADDR, __LINE__);
3954                         memcpy(&ecpsig, ecpsigp, sizeof(cdkecpsig_t));
3955                         if (ecpsig.magic == ECP_MAGIC)
3956                                 foundit = 1;
3957                 } else {
3958                         onbsigp = (cdkonbsig_t *) stli_onbegetmemptr(brdp, CDK_SIGADDR, __LINE__);
3959                         memcpy(&onbsig, onbsigp, sizeof(cdkonbsig_t));
3960                         if ((onbsig.magic0 == ONB_MAGIC0) && (onbsig.magic1 == ONB_MAGIC1) &&
3961                                         (onbsig.magic2 == ONB_MAGIC2) && (onbsig.magic3 == ONB_MAGIC3))
3962                                 foundit = 1;
3963                 }
3964 #if STLI_HIMEMORY
3965                 if (brdp->memaddr >= 0x100000)
3966                         vfree(brdp->membase);
3967 #endif
3968                 if (foundit)
3969                         break;
3970         }
3971 
3972 /*
3973  *      Regardless of whether we found the shared memory or not we must
3974  *      disable the region. After that return success or failure.
3975  */
3976         if (brdp->brdtype == BRD_ECPE)
3977                 stli_ecpeidisable(brdp);
3978         else
3979                 stli_onbedisable(brdp);
3980 
3981         if (! foundit) {
3982                 brdp->memaddr = 0;
3983                 brdp->membase = 0;
3984                 printk("STALLION: failed to probe shared memory region for %s in EISA slot=%d\n", stli_brdnames[brdp->brdtype], (brdp->iobase >> 12));
3985                 return(-ENODEV);
3986         }
3987         return(0);
3988 }
3989 
3990 /*****************************************************************************/
3991 
3992 /*
3993  *      Probe around and try to find any EISA boards in system. The biggest
3994  *      problem here is finding out what memory address is associated with
3995  *      an EISA board after it is found. The registers of the ECPE and
3996  *      ONboardE are not readable - so we can't read them from there. We
3997  *      don't have access to the EISA CMOS (or EISA BIOS) so we don't
3998  *      actually have any way to find out the real value. The best we can
3999  *      do is go probing around in the usual places hoping we can find it.
4000  */
4001 
4002 static int stli_findeisabrds()
     /*  */
4003 {
4004         stlibrd_t       *brdp;
4005         unsigned int    iobase, eid;
4006         int             i;
4007 
4008 #if DEBUG
4009         printk("stli_findeisabrds()\n");
4010 #endif
4011 
4012 /*
4013  *      Firstly check if this is an EISA system. Do this by probing for
4014  *      the system board EISA ID. If this is not an EISA system then
4015  *      don't bother going any further!
4016  */
4017         outb(0xff, 0xc80);
4018         if (inb(0xc80) == 0xff)
4019                 return(0);
4020 
4021 /*
4022  *      Looks like an EISA system, so go searching for EISA boards.
4023  */
4024         for (iobase = 0x1000; (iobase <= 0xc000); iobase += 0x1000) {
4025                 outb(0xff, (iobase + 0xc80));
4026                 eid = inb(iobase + 0xc80);
4027                 eid |= inb(iobase + 0xc81) << 8;
4028                 if (eid != STL_EISAID)
4029                         continue;
4030 
4031 /*
4032  *              We have found a board. Need to check if this board was
4033  *              statically configured already (just in case!).
4034  */
4035                 for (i = 0; (i < STL_MAXBRDS); i++) {
4036                         brdp = stli_brds[i];
4037                         if (brdp == (stlibrd_t *) NULL)
4038                                 continue;
4039                         if (brdp->iobase == iobase)
4040                                 break;
4041                 }
4042                 if (i < STL_MAXBRDS)
4043                         continue;
4044 
4045 /*
4046  *              Check that we have room for this new board in our board
4047  *              info table.
4048  */
4049                 if (stli_nrbrds >= STL_MAXBRDS) {
4050                         printk("STALLION: no room for more probed boards, maximum supported %d\n", STL_MAXBRDS);
4051                         break;
4052                 }
4053 
4054 /*
4055  *              We have found a Stallion board and it is not configured already.
4056  *              Allocate a board structure and initialize it.
4057  */
4058                 brdp = (stlibrd_t *) stli_memalloc(sizeof(stlibrd_t));
4059                 if (brdp == (stlibrd_t *) NULL) {
4060                         printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlibrd_t));
4061                         return(-ENOMEM);
4062                 }
4063                 memset(brdp, 0, sizeof(stlibrd_t));
4064 
4065                 brdp->brdnr = stli_nrbrds++;
4066                 eid = inb(iobase + 0xc82);
4067                 if (eid == ECP_EISAID)
4068                         brdp->brdtype = BRD_ECPE;
4069                 else if (eid == ONB_EISAID)
4070                         brdp->brdtype = BRD_ONBOARDE;
4071                 else
4072                         brdp->brdtype = BRD_UNKNOWN;
4073                 brdp->iobase = iobase;
4074                 outb(0x1, (iobase + 0xc84));
4075                 if (stli_eisamemprobe(brdp))
4076                         outb(0, (iobase + 0xc84));
4077                 stli_brdinit(brdp);
4078         }
4079 
4080         return(0);
4081 }
4082 
4083 /*****************************************************************************/
4084 
4085 /*
4086  *      Scan through all the boards in the configuration and see what we
4087  *      can find.
4088  */
4089 
4090 static int stli_initbrds()
     /*  */
4091 {
4092         stlibrd_t       *brdp, *nxtbrdp;
4093         stlconf_t       *confp;
4094         int             i, j;
4095 
4096 #if DEBUG
4097         printk("stli_initbrds()\n");
4098 #endif
4099 
4100         if (stli_nrbrds > STL_MAXBRDS) {
4101                 printk("STALLION: too many boards in configuration table, truncating to %d\n", STL_MAXBRDS);
4102                 stli_nrbrds = STL_MAXBRDS;
4103         }
4104 
4105 /*
4106  *      Firstly scan the list of static boards configured. Allocate
4107  *      resources and initialize the boards as found.
4108  */
4109         for (i = 0; (i < stli_nrbrds); i++) {
4110                 confp = &stli_brdconf[i];
4111                 brdp = (stlibrd_t *) stli_memalloc(sizeof(stlibrd_t));
4112                 if (brdp == (stlibrd_t *) NULL) {
4113                         printk("STALLION: failed to allocate memory (size=%d)\n", sizeof(stlibrd_t));
4114                         return(-ENOMEM);
4115                 }
4116                 memset(brdp, 0, sizeof(stlibrd_t));
4117 
4118                 brdp->brdnr = i;
4119                 brdp->brdtype = confp->brdtype;
4120                 brdp->iobase = confp->ioaddr1;
4121                 brdp->memaddr = confp->memaddr;
4122                 stli_brdinit(brdp);
4123         }
4124 
4125 /*
4126  *      Now go probing for EISA boards if enabled.
4127  */
4128         if (stli_eisaprobe)
4129                 stli_findeisabrds();
4130 
4131 /*
4132  *      All found boards are initialized. Now for a little optimization, if
4133  *      no boards are sharing the "shared memory" regions then we can just
4134  *      leave them all enabled. This is in fact the usual case.
4135  */
4136         stli_shared = 0;
4137         if (stli_nrbrds > 1) {
4138                 for (i = 0; (i < stli_nrbrds); i++) {
4139                         brdp = stli_brds[i];
4140                         if (brdp == (stlibrd_t *) NULL)
4141                                 continue;
4142                         for (j = i + 1; (j < stli_nrbrds); j++) {
4143                                 nxtbrdp = stli_brds[j];
4144                                 if (nxtbrdp == (stlibrd_t *) NULL)
4145                                         continue;
4146                                 if ((brdp->membase >= nxtbrdp->membase) && (brdp->membase <= (nxtbrdp->membase + nxtbrdp->memsize - 1))) {
4147                                         stli_shared++;
4148                                         break;
4149                                 }
4150                         }
4151                 }
4152         }
4153 
4154         if (stli_shared == 0) {
4155                 for (i = 0; (i < stli_nrbrds); i++) {
4156                         brdp = stli_brds[i];
4157                         if (brdp == (stlibrd_t *) NULL)
4158                                 continue;
4159                         if (brdp->state & BST_FOUND) {
4160                                 EBRDENABLE(brdp);
4161                                 brdp->enable = NULL;
4162                                 brdp->disable = NULL;
4163                         }
4164                 }
4165         }
4166 
4167         return(0);
4168 }
4169 
4170 /*****************************************************************************/
4171 
4172 /*
4173  *      Code to handle an "staliomem" read operation. This device is the 
4174  *      contents of the board shared memory. It is used for down loading
4175  *      the slave image (and debugging :-)
4176  */
4177 
4178 static int stli_memread(struct inode *ip, struct file *fp, char *buf, int count)
     /*  */
4179 {
4180         unsigned long   flags;
4181         void            *memptr;
4182         stlibrd_t       *brdp;
4183         int             brdnr, size, n;
4184 
4185 #if DEBUG
4186         printk("stli_memread(ip=%x,fp=%x,buf=%x,count=%d)\n", (int) ip, (int) fp, (int) buf, count);
4187 #endif
4188 
4189         brdnr = MINOR(ip->i_rdev);
4190         if (brdnr >= stli_nrbrds)
4191                 return(-ENODEV);
4192         brdp = stli_brds[brdnr];
4193         if (brdp == (stlibrd_t *) NULL)
4194                 return(-ENODEV);
4195         if (brdp->state == 0)
4196                 return(-ENODEV);
4197         if (fp->f_pos >= brdp->memsize)
4198                 return(0);
4199 
4200         size = MIN(count, (brdp->memsize - fp->f_pos));
4201 
4202         save_flags(flags);
4203         cli();
4204         EBRDENABLE(brdp);
4205         while (size > 0) {
4206                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
4207                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
4208                 memcpy_tofs(buf, memptr, n);
4209                 fp->f_pos += n;
4210                 buf += n;
4211                 size -= n;
4212         }
4213         EBRDDISABLE(brdp);
4214         restore_flags(flags);
4215 
4216         return(count);
4217 }
4218 
4219 /*****************************************************************************/
4220 
4221 /*
4222  *      Code to handle an "staliomem" write operation. This device is the 
4223  *      contents of the board shared memory. It is used for down loading
4224  *      the slave image (and debugging :-)
4225  */
4226 
4227 static int stli_memwrite(struct inode *ip, struct file *fp, const char *buf, int count)
     /*  */
4228 {
4229         unsigned long   flags;
4230         void            *memptr;
4231         stlibrd_t       *brdp;
4232         char            *chbuf;
4233         int             brdnr, size, n;
4234 
4235 #if DEBUG
4236         printk("stli_memwrite(ip=%x,fp=%x,buf=%x,count=%x)\n", (int) ip, (int) fp, (int) buf, count);
4237 #endif
4238 
4239         brdnr = MINOR(ip->i_rdev);
4240         if (brdnr >= stli_nrbrds)
4241                 return(-ENODEV);
4242         brdp = stli_brds[brdnr];
4243         if (brdp == (stlibrd_t *) NULL)
4244                 return(-ENODEV);
4245         if (brdp->state == 0)
4246                 return(-ENODEV);
4247         if (fp->f_pos >= brdp->memsize)
4248                 return(0);
4249 
4250         chbuf = (char *) buf;
4251         size = MIN(count, (brdp->memsize - fp->f_pos));
4252 
4253         save_flags(flags);
4254         cli();
4255         EBRDENABLE(brdp);
4256         while (size > 0) {
4257                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
4258                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
4259                 memcpy_fromfs(memptr, chbuf, n);
4260                 fp->f_pos += n;
4261                 chbuf += n;
4262                 size -= n;
4263         }
4264         EBRDDISABLE(brdp);
4265         restore_flags(flags);
4266 
4267         return(count);
4268 }
4269 
4270 /*****************************************************************************/
4271 
4272 /*
4273  *      Return the board stats structure to user app.
4274  */
4275 
4276 static int stli_getbrdstats(combrd_t *bp)
     /*  */
4277 {
4278         stlibrd_t       *brdp;
4279         int             i;
4280 
4281         memcpy_fromfs(&stli_brdstats, bp, sizeof(combrd_t));
4282         if (stli_brdstats.brd >= STL_MAXBRDS)
4283                 return(-ENODEV);
4284         brdp = stli_brds[stli_brdstats.brd];
4285         if (brdp == (stlibrd_t *) NULL)
4286                 return(-ENODEV);
4287 
4288         memset(&stli_brdstats, 0, sizeof(combrd_t));
4289         stli_brdstats.brd = brdp->brdnr;
4290         stli_brdstats.type = brdp->brdtype;
4291         stli_brdstats.hwid = 0;
4292         stli_brdstats.state = brdp->state;
4293         stli_brdstats.ioaddr = brdp->iobase;
4294         stli_brdstats.memaddr = brdp->memaddr;
4295         stli_brdstats.nrpanels = brdp->nrpanels;
4296         stli_brdstats.nrports = brdp->nrports;
4297         for (i = 0; (i < brdp->nrpanels); i++) {
4298                 stli_brdstats.panels[i].panel = i;
4299                 stli_brdstats.panels[i].hwid = brdp->panelids[i];
4300                 stli_brdstats.panels[i].nrports = brdp->panels[i];
4301         }
4302 
4303         memcpy_tofs(bp, &stli_brdstats, sizeof(combrd_t));
4304         return(0);
4305 }
4306 
4307 /*****************************************************************************/
4308 
4309 /*
4310  *      Resolve the referenced port number into a port struct pointer.
4311  */
4312 
4313 static stliport_t *stli_getport(int brdnr, int panelnr, int portnr)
     /*  */
4314 {
4315         stlibrd_t       *brdp;
4316         int             i;
4317 
4318         if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
4319                 return((stliport_t *) NULL);
4320         brdp = stli_brds[brdnr];
4321         if (brdp == (stlibrd_t *) NULL)
4322                 return((stliport_t *) NULL);
4323         for (i = 0; (i < panelnr); i++)
4324                 portnr += brdp->panels[i];
4325         if ((portnr < 0) || (portnr >= brdp->nrports))
4326                 return((stliport_t *) NULL);
4327         return(brdp->ports[portnr]);
4328 }
4329 
4330 /*****************************************************************************/
4331 
4332 /*
4333  *      Return the port stats structure to user app. A NULL port struct
4334  *      pointer passed in means that we need to find out from the app
4335  *      what port to get stats for (used through board control device).
4336  */
4337 
4338 static int stli_getportstats(stliport_t *portp, comstats_t *cp)
     /*  */
4339 {
4340         stlibrd_t       *brdp;
4341         int             rc;
4342 
4343         if (portp == (stliport_t *) NULL) {
4344                 memcpy_fromfs(&stli_comstats, cp, sizeof(comstats_t));
4345                 portp = stli_getport(stli_comstats.brd, stli_comstats.panel, stli_comstats.port);
4346                 if (portp == (stliport_t *) NULL)
4347                         return(-ENODEV);
4348         }
4349 
4350         brdp = stli_brds[portp->brdnr];
4351         if (brdp == (stlibrd_t *) NULL)
4352                 return(-ENODEV);
4353 
4354         portp->stats.state = portp->state;
4355         portp->stats.flags = portp->flags;
4356         if (portp->tty != (struct tty_struct *) NULL) {
4357                 portp->stats.ttystate = portp->tty->flags;
4358                 portp->stats.cflags = portp->tty->termios->c_cflag;
4359                 portp->stats.iflags = portp->tty->termios->c_iflag;
4360                 portp->stats.oflags = portp->tty->termios->c_oflag;
4361                 portp->stats.lflags = portp->tty->termios->c_lflag;
4362                 portp->stats.rxbuffered = portp->tty->flip.count;
4363         } else {
4364                 portp->stats.ttystate = 0;
4365                 portp->stats.cflags = 0;
4366                 portp->stats.iflags = 0;
4367                 portp->stats.oflags = 0;
4368                 portp->stats.lflags = 0;
4369                 portp->stats.rxbuffered = 0;
4370         }
4371 
4372         if ((rc = stli_cmdwait(brdp, portp, A_GETSTATS, &stli_cdkstats, sizeof(asystats_t), 1)) < 0)
4373                 return(rc);
4374 
4375         portp->stats.txtotal = stli_cdkstats.txchars;
4376         portp->stats.rxtotal = stli_cdkstats.rxchars + stli_cdkstats.ringover;
4377         portp->stats.txbuffered = stli_cdkstats.txringq;
4378         portp->stats.rxbuffered += stli_cdkstats.rxringq;
4379         portp->stats.rxoverrun = stli_cdkstats.overruns;
4380         portp->stats.rxparity = stli_cdkstats.parity;
4381         portp->stats.rxframing = stli_cdkstats.framing;
4382         portp->stats.rxlost = stli_cdkstats.ringover;
4383         portp->stats.rxbreaks = stli_cdkstats.rxbreaks;
4384         portp->stats.txbreaks = stli_cdkstats.txbreaks;
4385         portp->stats.txxon = stli_cdkstats.txstart;
4386         portp->stats.txxoff = stli_cdkstats.txstop;
4387         portp->stats.rxxon = stli_cdkstats.rxstart;
4388         portp->stats.rxxoff = stli_cdkstats.rxstop;
4389         portp->stats.rxrtsoff = stli_cdkstats.rtscnt / 2;
4390         portp->stats.rxrtson = stli_cdkstats.rtscnt - portp->stats.rxrtsoff;
4391         portp->stats.modem = stli_cdkstats.dcdcnt;
4392         portp->stats.hwid = stli_cdkstats.hwid;
4393         portp->stats.signals = stli_mktiocm(stli_cdkstats.signals);
4394 
4395         memcpy_tofs(cp, &portp->stats, sizeof(comstats_t));
4396         return(0);
4397 }
4398 
4399 /*****************************************************************************/
4400 
4401 /*
4402  *      Clear the port stats structure. We also return it zeroed out...
4403  */
4404 
4405 static int stli_clrportstats(stliport_t *portp, comstats_t *cp)
     /*  */
4406 {
4407         stlibrd_t       *brdp;
4408         int             rc;
4409 
4410         if (portp == (stliport_t *) NULL) {
4411                 memcpy_fromfs(&stli_comstats, cp, sizeof(comstats_t));
4412                 portp = stli_getport(stli_comstats.brd, stli_comstats.panel, stli_comstats.port);
4413                 if (portp == (stliport_t *) NULL)
4414                         return(-ENODEV);
4415         }
4416 
4417         brdp = stli_brds[portp->brdnr];
4418         if (brdp == (stlibrd_t *) NULL)
4419                 return(-ENODEV);
4420 
4421         memset(&portp->stats, 0, sizeof(comstats_t));
4422         portp->stats.brd = portp->brdnr;
4423         portp->stats.panel = portp->panelnr;
4424         portp->stats.port = portp->portnr;
4425 
4426         if ((rc = stli_cmdwait(brdp, portp, A_CLEARSTATS, 0, 0, 0)) < 0)
4427                 return(rc);
4428 
4429         memcpy_tofs(cp, &portp->stats, sizeof(comstats_t));
4430         return(0);
4431 }
4432 
4433 /*****************************************************************************/
4434 
4435 /*
4436  *      The "staliomem" device is also required to do some special operations on
4437  *      the board. We need to be able to send an interrupt to the board,
4438  *      reset it, and start/stop it.
4439  */
4440 
4441 static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
     /*  */
4442 {
4443         stlibrd_t       *brdp;
4444         int             brdnr, rc;
4445 
4446 #if DEBUG
4447         printk("stli_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, (int) fp, cmd, (int) arg);
4448 #endif
4449 
4450         brdnr = MINOR(ip->i_rdev);
4451         if (brdnr >= stli_nrbrds)
4452                 return(-ENODEV);
4453         brdp = stli_brds[brdnr];
4454         if (brdp == (stlibrd_t *) NULL)
4455                 return(-ENODEV);
4456         if (brdp->state == 0)
4457                 return(-ENODEV);
4458 
4459         rc = 0;
4460 
4461         switch (cmd) {
4462         case STL_BINTR:
4463                 EBRDINTR(brdp);
4464                 break;
4465         case STL_BSTART:
4466                 rc = stli_startbrd(brdp);
4467                 break;
4468         case STL_BSTOP:
4469                 brdp->state &= ~BST_STARTED;
4470                 break;
4471         case STL_BRESET:
4472                 brdp->state &= ~BST_STARTED;
4473                 EBRDRESET(brdp);
4474                 if (stli_shared == 0) {
4475                         if (brdp->reenable != NULL)
4476                                 (* brdp->reenable)(brdp);
4477                 }
4478                 break;
4479         case COM_GETPORTSTATS:
4480                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
4481                         rc = stli_getportstats((stliport_t *) NULL, (comstats_t *) arg);
4482                 break;
4483         case COM_CLRPORTSTATS:
4484                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(comstats_t))) == 0)
4485                         rc = stli_clrportstats((stliport_t *) NULL, (comstats_t *) arg);
4486                 break;
4487         case COM_GETBRDSTATS:
4488                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(combrd_t))) == 0)
4489                         rc = stli_getbrdstats((combrd_t *) arg);
4490                 break;
4491         default:
4492                 rc = -ENOIOCTLCMD;
4493                 break;
4494         }
4495 
4496         return(rc);
4497 }
4498 
4499 /*****************************************************************************/
4500 
4501 int stli_init()
     /*  */
4502 {
4503         printk("%s: version %s\n", stli_drvname, stli_drvversion);
4504 
4505         stli_initbrds();
4506 
4507 /*
4508  *      Allocate a temporary write buffer.
4509  */
4510         stli_tmpwritebuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
4511         if (stli_tmpwritebuf == (char *) NULL)
4512                 printk("STALLION: failed to allocate memory (size=%d)\n", STLI_TXBUFSIZE);
4513         stli_txcookbuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
4514         if (stli_txcookbuf == (char *) NULL)
4515                 printk("STALLION: failed to allocate memory (size=%d)\n", STLI_TXBUFSIZE);
4516 
4517 /*
4518  *      Set up a character driver for the shared memory region. We need this
4519  *      to down load the slave code image. Also it is a useful debugging tool.
4520  */
4521         if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
4522                 printk("STALLION: failed to register serial memory device\n");
4523 
4524 /*
4525  *      Set up the tty driver structure and register us as a driver.
4526  *      Also setup the callout tty device.
4527  */
4528         memset(&stli_serial, 0, sizeof(struct tty_driver));
4529         stli_serial.magic = TTY_DRIVER_MAGIC;
4530         stli_serial.name = stli_serialname;
4531         stli_serial.major = STL_SERIALMAJOR;
4532         stli_serial.minor_start = 0;
4533         stli_serial.num = STL_MAXBRDS * STL_MAXPORTS;
4534         stli_serial.type = TTY_DRIVER_TYPE_SERIAL;
4535         stli_serial.subtype = STL_DRVTYPSERIAL;
4536         stli_serial.init_termios = stli_deftermios;
4537         stli_serial.flags = TTY_DRIVER_REAL_RAW;
4538         stli_serial.refcount = &stli_refcount;
4539         stli_serial.table = stli_ttys;
4540         stli_serial.termios = stli_termios;
4541         stli_serial.termios_locked = stli_termioslocked;
4542         
4543         stli_serial.open = stli_open;
4544         stli_serial.close = stli_close;
4545         stli_serial.write = stli_write;
4546         stli_serial.put_char = stli_putchar;
4547         stli_serial.flush_chars = stli_flushchars;
4548         stli_serial.write_room = stli_writeroom;
4549         stli_serial.chars_in_buffer = stli_charsinbuffer;
4550         stli_serial.ioctl = stli_ioctl;
4551         stli_serial.set_termios = stli_settermios;
4552         stli_serial.throttle = stli_throttle;
4553         stli_serial.unthrottle = stli_unthrottle;
4554         stli_serial.stop = stli_stop;
4555         stli_serial.start = stli_start;
4556         stli_serial.hangup = stli_hangup;
4557         stli_serial.flush_buffer = stli_flushbuffer;
4558 
4559         stli_callout = stli_serial;
4560         stli_callout.name = stli_calloutname;
4561         stli_callout.major = STL_CALLOUTMAJOR;
4562         stli_callout.subtype = STL_DRVTYPCALLOUT;
4563 
4564         if (tty_register_driver(&stli_serial))
4565                 printk("STALLION: failed to register serial driver\n");
4566         if (tty_register_driver(&stli_callout))
4567                 printk("STALLION: failed to register callout driver\n");
4568 
4569         return(0);
4570 }
4571 
4572 /*****************************************************************************/