drivers/char/istallion.c

/* */
This source file includes following definitions.
init_module
cleanup_module
stli_meminit
stli_memhalt
stli_memalloc
stli_open
stli_close
stli_initopen
stli_rawopen
stli_rawclose
stli_cmdwait
stli_setport
stli_delay
stli_waitcarrier
stli_write
stli_putchar
stli_flushchars
stli_writeroom
stli_charsinbuffer
stli_getserial
stli_setserial
stli_ioctl
stli_settermios
stli_throttle
stli_unthrottle
stli_stop
stli_start
stli_dohangup
stli_hangup
stli_flushbuffer
stli_sendcmd
stli_read
stli_dodelaycmd
stli_hostcmd
stli_poll
stli_mkasyport
stli_mkasysigs
stli_mktiocm
stli_initports
stli_ecpinit
stli_ecpenable
stli_ecpdisable
stli_ecpgetmemptr
stli_ecpreset
stli_ecpintr
stli_ecpeiinit
stli_ecpeienable
stli_ecpeidisable
stli_ecpeigetmemptr
stli_ecpeireset
stli_ecpmcenable
stli_ecpmcdisable
stli_ecpmcgetmemptr
stli_ecpmcreset
stli_onbinit
stli_onbenable
stli_onbdisable
stli_onbgetmemptr
stli_onbreset
stli_onbeinit
stli_onbeenable
stli_onbedisable
stli_onbegetmemptr
stli_onbereset
stli_bbyinit
stli_bbygetmemptr
stli_bbyreset
stli_stalinit
stli_stalgetmemptr
stli_stalreset
stli_mapbrdmem
stli_initecp
stli_initonb
stli_startbrd
stli_brdinit
stli_memread
stli_memwrite
stli_memioctl
stli_init
   1 /*****************************************************************************/
   2 
   3 /*
   4  *      istallion.c  -- stallion intelligent multiport serial driver.
   5  *
   6  *      Copyright (C) 1994,1995  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 #ifdef MODULE
  29 #include <linux/config.h>
  30 #include <linux/module.h>
  31 #include <linux/version.h>
  32 #endif
  33 
  34 #include <linux/errno.h>
  35 #include <linux/sched.h>
  36 #include <linux/timer.h>
  37 #include <linux/wait.h>
  38 #include <linux/interrupt.h>
  39 #include <linux/termios.h>
  40 #include <linux/fcntl.h>
  41 #include <linux/tty_driver.h>
  42 #include <linux/tty.h>
  43 #include <linux/tty_flip.h>
  44 #include <linux/serial.h>
  45 #include <linux/cdk.h>
  46 #include <linux/string.h>
  47 #include <linux/malloc.h>
  48 #include <linux/ioport.h>
  49 #include <linux/delay.h>
  50 #include <asm/io.h>
  51 
  52 /*****************************************************************************/
  53 
  54 /*
  55  *      Define different board types. Not all of the following board types
  56  *      are supported by this driver. But I will use the standard "assigned"
  57  *      board numbers. Currently supported boards are abbreviated as:
  58  *      ECP = EasyConnection 8/64, ONB = ONboard, BBY = Brumby and
  59  *      STAL = Stallion.
  60  */
  61 #define BRD_UNKNOWN     0
  62 #define BRD_STALLION    1
  63 #define BRD_BRUMBY4     2
  64 #define BRD_ONBOARD2    3
  65 #define BRD_ONBOARD     4
  66 #define BRD_BRUMBY8     5
  67 #define BRD_BRUMBY16    6
  68 #define BRD_ONBOARDE    7
  69 #define BRD_ONBOARD32   9
  70 #define BRD_ONBOARD2_32 10
  71 #define BRD_ONBOARDRS   11
  72 #define BRD_EASYIO      20
  73 #define BRD_ECH         21
  74 #define BRD_ECHMC       22
  75 #define BRD_ECP         23
  76 #define BRD_ECPE        24
  77 #define BRD_ECPMC       25
  78 #define BRD_ECHPCI      26
  79 
  80 #define BRD_BRUMBY      BRD_BRUMBY4
  81 
  82 /*
  83  *      Define a configuration structure to hold the board configuration.
  84  *      Need to set this up in the code (for now) with the boards that are
  85  *      to be configured into the system. This is what needs to be modified
  86  *      when adding/removing/modifying boards. Each line entry in the
  87  *      stli_brdconf[] array is a board. Each line contains io/irq/memory
  88  *      ranges for that board (as well as what type of board it is).
  89  *      Some examples:
  90  *              { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
  91  *      This line will configure an EasyConnection 8/64 at io address 2a0,
  92  *      and shared memory address of cc000. Multiple EasyConnection 8/64
  93  *      boards can share the same shared memory address space. No interrupt
  94  *      is required for this board type.
  95  *      Another example:
  96  *              { BRD_ONBOARD, 0x240, 0, 0xd0000, 0, 0 },
  97  *      This line will configure an ONboard (ISA type) at io address 240,
  98  *      and shared memory address of d0000. Multiple ONboards can share
  99  *      the same shared memory address space. No interrupt required.
 100  *      Another example:
 101  *              { BRD_BRUMBY4, 0x360, 0, 0xc8000, 0, 0 },
 102  *      This line will configure a Brumby board (any number of ports!) at
 103  *      io address 360 and shared memory address of c8000. All Brumby boards
 104  *      configured into a system must have their own separate io and memory
 105  *      addresses. No interrupt is required.
 106  *      Another example:
 107  *              { BRD_STALLION, 0x330, 0, 0xd0000, 0, 0 },
 108  *      This line will configure an original Stallion board at io address 330
 109  *      and shared memory address d0000 (this would only be valid for a "V4.0"
 110  *      or Rev.O Stallion board). All Stallion boards configured into the
 111  *      system must have their own separate io and memory addresses. No
 112  *      interrupt is required.
 113  */
 114 
 115 typedef struct {
 116         int             brdtype;
 117         int             ioaddr1;
 118         int             ioaddr2;
 119         unsigned long   memaddr;
 120         int             irq;
 121         int             irqtype;
 122 } stlconf_t;
 123 
 124 static stlconf_t        stli_brdconf[] = {
 125         { BRD_ECP, 0x2a0, 0, 0xcc000, 0, 0 },
 126 };
 127 
 128 static int      stli_nrbrds = sizeof(stli_brdconf) / sizeof(stlconf_t);
 129 
 130 /*
 131  *      Code support is offered for boards to use the above 1Mb memory
 132  *      ranges for those boards which support this (supported on the ONboard
 133  *      and ECP-EI hardware). The following switch should be enabled. The only
 134  *      catch is that the kernel functions required to do this are not
 135  *      normally exported symbols, so you will have to do some extra work
 136  *      for this to be used in the loadable module form of the driver.
 137  *      Unfortunately this doesn't work either if you linke the driver into
 138  *      the kernel, sincethe memory management code is not set up early
 139  *      enough (before our initialization routine is run).
 140  */
 141 #define STLI_HIMEMORY   0
 142 
 143 #if STLI_HIMEMORY
 144 #include <asm/page.h>
 145 #include <asm/pgtable.h>
 146 #endif
 147 
 148 /*****************************************************************************/
 149 
 150 /*
 151  *      Define some important driver characteristics. Device major numbers
 152  *      allocated as per Linux Device Registery.
 153  */
 154 #ifndef STL_SIOMEMMAJOR
 155 #define STL_SIOMEMMAJOR         28
 156 #endif
 157 #ifndef STL_SERIALMAJOR
 158 #define STL_SERIALMAJOR         24
 159 #endif
 160 #ifndef STL_CALLOUTMAJOR
 161 #define STL_CALLOUTMAJOR        25
 162 #endif
 163 
 164 #define STL_DRVTYPSERIAL        1
 165 #define STL_DRVTYPCALLOUT       2
 166 
 167 #define STL_MAXBRDS             4
 168 #define STL_MAXPANELS           4
 169 #define STL_MAXPORTS            64
 170 #define STL_MAXCHANS            (STL_MAXPORTS + 1)
 171 #define STL_MAXDEVS             (STL_MAXBRDS * STL_MAXPORTS)
 172 
 173 /*****************************************************************************/
 174 
 175 /*
 176  *      Define our local driver identity first. Set up stuff to deal with
 177  *      all the local structures required by a serial tty driver.
 178  */
 179 static char     *stli_drvname = "Stallion Intelligent Multiport Serial Driver";
 180 static char     *stli_drvversion = "1.0.0";
 181 static char     *stli_serialname = "ttyE";
 182 static char     *stli_calloutname = "cue";
 183 
 184 static struct tty_driver        stli_serial;
 185 static struct tty_driver        stli_callout;
 186 static struct tty_struct        *stli_ttys[STL_MAXDEVS];
 187 static struct termios           *stli_termios[STL_MAXDEVS];
 188 static struct termios           *stli_termioslocked[STL_MAXDEVS];
 189 static int                      stli_refcount;
 190 
 191 /*
 192  *      We will need to allocate a temporary write buffer for chars that
 193  *      come direct from user space. The problem is that a copy from user
 194  *      space might cause a page fault (typically on a system that is
 195  *      swapping!). All ports will share one buffer - since if the system
 196  *      is already swapping a shared buffer won't make things any worse.
 197  */
 198 static char                     *stli_tmpwritebuf = (char *) NULL;
 199 static struct semaphore         stli_tmpwritesem = MUTEX;
 200 
 201 #define STLI_TXBUFSIZE          4096
 202 
 203 /*
 204  *      Use a fast local buffer for cooked characters. Typically a whole
 205  *      bunch of cooked characters come in for a port, 1 at a time. So we
 206  *      save those up into a local buffer, then write out the whole lot
 207  *      with a large memcpy. Just use 1 buffer for all ports, since its
 208  *      use it is only need for short periods of time by each port.
 209  */
 210 static char                     *stli_txcookbuf = (char *) NULL;
 211 static int                      stli_txcooksize = 0;
 212 static int                      stli_txcookrealsize = 0;
 213 static struct tty_struct        *stli_txcooktty = (struct tty_struct *) NULL;
 214 
 215 /*
 216  *      Define a local default termios struct. All ports will be created
 217  *      with this termios initially. Basically all it defines is a raw port
 218  *      at 9600 baud, 8 data bits, no parity, 1 stop bit.
 219  */
 220 static struct termios           stli_deftermios = {
 221         0,
 222         0,
 223         (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
 224         0,
 225         0,
 226         INIT_C_CC
 227 };
 228 
 229 /*
 230  *      Memory allocation vars. These keep track of what memory allocation
 231  *      we can currently use. They help deal with memory in a consistent
 232  *      way, whether during init or run-time.
 233  */
 234 static int      stli_meminited = 0;
 235 static long     stli_memend;
 236 
 237 /*****************************************************************************/
 238 
 239 /*
 240  *      Define a set of structures to hold all the board/panel/port info
 241  *      for our ports. These will be dynamically allocated as required at
 242  *      driver initialization time.
 243  */
 244 
 245 /*
 246  *      Port and board structures to hold status info about each object.
 247  *      The board structure contains pointers to structures for each port
 248  *      connected to it. Panels are not distinguished here, since
 249  *      communication with the slave board will always be on a per port
 250  *      basis.
 251  */
 252 typedef struct {
 253         int                     portnr;
 254         int                     panelnr;
 255         int                     brdnr;
 256         unsigned long           state;
 257         int                     devnr;
 258         int                     flags;
 259         int                     baud_base;
 260         int                     custom_divisor;
 261         int                     close_delay;
 262         int                     closing_wait;
 263         int                     refcount;
 264         int                     openwaitcnt;
 265         int                     rc;
 266         int                     argsize;
 267         void                    *argp;
 268         long                    session;
 269         long                    pgrp;
 270         unsigned int            rxmarkmsk;
 271         struct tty_struct       *tty;
 272         struct wait_queue       *open_wait;
 273         struct wait_queue       *close_wait;
 274         struct wait_queue       *raw_wait;
 275         struct tq_struct        tqhangup;
 276         struct termios          normaltermios;
 277         struct termios          callouttermios;
 278         asysigs_t               asig;
 279         unsigned long           addr;
 280         unsigned long           rxoffset;
 281         unsigned long           txoffset;
 282         unsigned int            rxsize;
 283         unsigned int            txsize;
 284         unsigned long           sigs;
 285         unsigned char           reqbit;
 286         unsigned char           portidx;
 287         unsigned char           portbit;
 288 } stliport_t;
 289 
 290 /*
 291  *      Use a structure of function pointers to do board level operations.
 292  *      These include, enable/disable, paging shared memory, interrupting, etc.
 293  */
 294 typedef struct stlbrd {
 295         int             brdnr;
 296         int             brdtype;
 297         int             state;
 298         int             nrpanels;
 299         int             nrports;
 300         int             nrdevs;
 301         unsigned int    iobase;
 302         void            *membase;
 303         int             memsize;
 304         int             pagesize;
 305         int             hostoffset;
 306         int             slaveoffset;
 307         int             bitsize;
 308         int             panels[STL_MAXPANELS];
 309         void            (*init)(struct stlbrd *brdp);
 310         void            (*enable)(struct stlbrd *brdp);
 311         void            (*reenable)(struct stlbrd *brdp);
 312         void            (*disable)(struct stlbrd *brdp);
 313         char            *(*getmemptr)(struct stlbrd *brdp, unsigned long offset, int line);
 314         void            (*intr)(struct stlbrd *brdp);
 315         void            (*reset)(struct stlbrd *brdp);
 316         stliport_t      *ports[STL_MAXPORTS];
 317 } stlibrd_t;
 318 
 319 static stlibrd_t        *stli_brds;
 320 
 321 static int              stli_shared = 0;
 322 
 323 /*
 324  *      Per board state flags. Used with the state field of the board struct.
 325  *      Not really much here... All we need to do is keep track of whether
 326  *      the board has been detected, and whether it is actully running a slave
 327  *      or not.
 328  */
 329 #define BST_FOUND       0x1
 330 #define BST_STARTED     0x2
 331 
 332 /*
 333  *      Define the set of port state flags. These are marked for internal
 334  *      state purposes only, usually to do with the state of communications
 335  *      with the slave. Most of them need to be updated atomically, so always
 336  *      use the bit setting operations (unless protected by cli/sti).
 337  */
 338 #define ST_INITIALIZING 1
 339 #define ST_OPENING      2
 340 #define ST_CLOSING      3
 341 #define ST_CMDING       4
 342 #define ST_TXBUSY       5
 343 #define ST_RXING        6
 344 #define ST_DOFLUSHRX    7
 345 #define ST_DOFLUSHTX    8
 346 #define ST_DOSIGS       9
 347 #define ST_RXSTOP       10
 348 #define ST_GETSIGS      11
 349 
 350 /*
 351  *      Define an array of board names as printable strings. Handy for
 352  *      referencing boards when printing trace and stuff.
 353  */
 354 static char     *stli_brdnames[] = {
 355         "Unknown",
 356         "Stallion",
 357         "Brumby",
 358         "ONboard-MC",
 359         "ONboard",
 360         "Brumby",
 361         "Brumby",
 362         "ONboard-EI",
 363         (char *) NULL,
 364         "ONboard",
 365         "ONboard-MC",
 366         "ONboard-MC",
 367         (char *) NULL,
 368         (char *) NULL,
 369         (char *) NULL,
 370         (char *) NULL,
 371         (char *) NULL,
 372         (char *) NULL,
 373         (char *) NULL,
 374         (char *) NULL,
 375         "EasyIO",
 376         "EC8/32-AT",
 377         "EC8/32-MC",
 378         "EC8/64-AT",
 379         "EC8/64-EI",
 380         "EC8/64-MC",
 381         "EC8/32-PCI",
 382 };
 383 
 384 /*****************************************************************************/
 385 
 386 /*
 387  *      Hardware configuration info for ECP boards. These defines apply
 388  *      to the directly accessable io ports of the ECP. There is a set of
 389  *      defines for each ECP board type, ISA, EISA and MCA.
 390  */
 391 #define ECP_IOSIZE      4
 392 #define ECP_MEMSIZE     (128 * 1024)
 393 #define ECP_ATPAGESIZE  (4 * 1024)
 394 #define ECP_EIPAGESIZE  (64 * 1024)
 395 #define ECP_MCPAGESIZE  (4 * 1024)
 396 
 397 /*
 398  *      Important defines for the ISA class of ECP board.
 399  */
 400 #define ECP_ATIREG      0
 401 #define ECP_ATCONFR     1
 402 #define ECP_ATMEMAR     2
 403 #define ECP_ATMEMPR     3
 404 #define ECP_ATSTOP      0x1
 405 #define ECP_ATINTENAB   0x10
 406 #define ECP_ATENABLE    0x20
 407 #define ECP_ATDISABLE   0x00
 408 #define ECP_ATADDRMASK  0x3f000
 409 #define ECP_ATADDRSHFT  12
 410 
 411 /*
 412  *      Important defines for the EISA class of ECP board.
 413  */
 414 #define ECP_EIIREG      0
 415 #define ECP_EIMEMARL    1
 416 #define ECP_EICONFR     2
 417 #define ECP_EIMEMARH    3
 418 #define ECP_EIENABLE    0x1
 419 #define ECP_EIDISABLE   0x0
 420 #define ECP_EISTOP      0x4
 421 #define ECP_EIEDGE      0x00
 422 #define ECP_EILEVEL     0x80
 423 #define ECP_EIADDRMASKL 0x00ff0000
 424 #define ECP_EIADDRSHFTL 16
 425 #define ECP_EIADDRMASKH 0xff000000
 426 #define ECP_EIADDRSHFTH 24
 427 #define ECP_EIBRDENAB   0xc84
 428 
 429 /*
 430  *      Important defines for the Micro-channel class of ECP board.
 431  *      (It has a lot in common with the ISA boards.)
 432  */
 433 #define ECP_MCIREG      0
 434 #define ECP_MCCONFR     1
 435 #define ECP_MCSTOP      0x20
 436 #define ECP_MCENABLE    0x80
 437 #define ECP_MCDISABLE   0x00
 438 
 439 /*
 440  *      Hardware configuration info for ONboard and Brumby boards. These
 441  *      defines apply to the directly accessable io ports of these boards.
 442  */
 443 #define ONB_IOSIZE      16
 444 #define ONB_MEMSIZE     (64 * 1024)
 445 #define ONB_ATPAGESIZE  (64 * 1024)
 446 #define ONB_MCPAGESIZE  (64 * 1024)
 447 #define ONB_EIMEMSIZE   (128 * 1024)
 448 #define ONB_EIPAGESIZE  (64 * 1024)
 449 
 450 /*
 451  *      Important defines for the ISA class of ONboard board.
 452  */
 453 #define ONB_ATIREG      0
 454 #define ONB_ATMEMAR     1
 455 #define ONB_ATCONFR     2
 456 #define ONB_ATSTOP      0x4
 457 #define ONB_ATENABLE    0x01
 458 #define ONB_ATDISABLE   0x00
 459 #define ONB_ATADDRMASK  0xff0000
 460 #define ONB_ATADDRSHFT  16
 461 
 462 #if STLI_HIMEMORY
 463 #define ONB_HIMEMENAB   0x02
 464 #else
 465 #define ONB_HIMEMENAB   0
 466 #endif
 467 
 468 /*
 469  *      Important defines for the EISA class of ONboard board.
 470  */
 471 #define ONB_EIIREG      0
 472 #define ONB_EIMEMARL    1
 473 #define ONB_EICONFR     2
 474 #define ONB_EIMEMARH    3
 475 #define ONB_EIENABLE    0x1
 476 #define ONB_EIDISABLE   0x0
 477 #define ONB_EISTOP      0x4
 478 #define ONB_EIEDGE      0x00
 479 #define ONB_EILEVEL     0x80
 480 #define ONB_EIADDRMASKL 0x00ff0000
 481 #define ONB_EIADDRSHFTL 16
 482 #define ONB_EIADDRMASKH 0xff000000
 483 #define ONB_EIADDRSHFTH 24
 484 #define ONB_EIBRDENAB   0xc84
 485 
 486 /*
 487  *      Important defines for the Brumby boards. They are pretty simple,
 488  *      there is not much that is programmably configurable.
 489  */
 490 #define BBY_IOSIZE      16
 491 #define BBY_MEMSIZE     (64 * 1024)
 492 #define BBY_PAGESIZE    (16 * 1024)
 493 
 494 #define BBY_ATIREG      0
 495 #define BBY_ATCONFR     1
 496 #define BBY_ATSTOP      0x4
 497 
 498 /*
 499  *      Important defines for the Stallion boards. They are pretty simple,
 500  *      there is not much that is programmably configurable.
 501  */
 502 #define STAL_IOSIZE     16
 503 #define STAL_MEMSIZE    (64 * 1024)
 504 #define STAL_PAGESIZE   (64 * 1024)
 505 
 506 /*
 507  *      Define the set of status register values for EasyConnection panels.
 508  *      The signature will return with the status value for each panel. From
 509  *      this we can determine what is attached to the board - before we have
 510  *      actually down loaded any code to it.
 511  */
 512 #define ECH_PNLSTATUS   2
 513 #define ECH_PNL16PORT   0x20
 514 #define ECH_PNLIDMASK   0x07
 515 #define ECH_PNLINTRPEND 0x80
 516 
 517 /*
 518  *      Define some macros to do things to the board. Even those these boards
 519  *      are somewhat related there is often significantly different ways of
 520  *      doing some operation on it (like enable, paging, reset, etc). So each
 521  *      board class has a set of functions which do the commonly required
 522  *      operations. The macros below basically just call these functions,
 523  *      generally checking for a NULL function - which means that the board
 524  *      needs nothing done to it to achieve this operation!
 525  */
 526 #define EBRDINIT(brdp)                                          \
 527         if (brdp->init != NULL)                                 \
 528                 (* brdp->init)(brdp)
 529 
 530 #define EBRDENABLE(brdp)                                        \
 531         if (brdp->enable != NULL)                               \
 532                 (* brdp->enable)(brdp);
 533 
 534 #define EBRDDISABLE(brdp)                                       \
 535         if (brdp->disable != NULL)                              \
 536                 (* brdp->disable)(brdp);
 537 
 538 #define EBRDINTR(brdp)                                          \
 539         if (brdp->intr != NULL)                                 \
 540                 (* brdp->intr)(brdp);
 541 
 542 #define EBRDRESET(brdp)                                         \
 543         if (brdp->reset != NULL)                                \
 544                 (* brdp->reset)(brdp);
 545 
 546 #define EBRDGETMEMPTR(brdp,offset)                              \
 547         (* brdp->getmemptr)(brdp, offset, __LINE__)
 548 
 549 /*
 550  *      Define the maximal baud rate, and he default baud base for ports.
 551  */
 552 #define STL_MAXBAUD     230400
 553 #define STL_BAUDBASE    115200
 554 #define STL_CLOSEDELAY  50
 555 
 556 /*****************************************************************************/
 557 
 558 /*
 559  *      Define macros to extract a brd or port number from a minor number.
 560  */
 561 #define MKDEV2BRD(min)          (((min) & 0xc0) >> 6)
 562 #define MKDEV2PORT(min)         ((min) & 0x3f)
 563 
 564 /*
 565  *      Define a baud rate table that converts termios baud rate selector
 566  *      into the actual baud rate value. All baud rate calculations are based
 567  *      on the actual baud rate required.
 568  */
 569 static unsigned int     stli_baudrates[] = {
 570         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
 571         9600, 19200, 38400, 57600, 115200, 230400
 572 };
 573 
 574 /*****************************************************************************/
 575 
 576 /*
 577  *      Define some handy local macros...
 578  */
 579 #define MIN(a,b)                (((a) <= (b)) ? (a) : (b))
 580 
 581 /*****************************************************************************/
 582 
 583 /*
 584  *      Prototype all functions in this driver!
 585  */
 586 
 587 #ifdef MODULE
 588 int             init_module(void);
 589 void            cleanup_module(void);
 590 #else
 591 static void     stli_meminit(long base);
 592 static long     stli_memhalt(void);
 593 #endif
 594 static void     *stli_memalloc(int len);
 595 
 596 long            stli_init(long kmem_start);
 597 static int      stli_open(struct tty_struct *tty, struct file *filp);
 598 static void     stli_close(struct tty_struct *tty, struct file *filp);
 599 static int      stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count);
 600 static void     stli_putchar(struct tty_struct *tty, unsigned char ch);
 601 static void     stli_flushchars(struct tty_struct *tty);
 602 static int      stli_writeroom(struct tty_struct *tty);
 603 static int      stli_charsinbuffer(struct tty_struct *tty);
 604 static int      stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg);
 605 static void     stli_settermios(struct tty_struct *tty, struct termios *old);
 606 static void     stli_throttle(struct tty_struct *tty);
 607 static void     stli_unthrottle(struct tty_struct *tty);
 608 static void     stli_stop(struct tty_struct *tty);
 609 static void     stli_start(struct tty_struct *tty);
 610 static void     stli_flushbuffer(struct tty_struct *tty);
 611 static void     stli_hangup(struct tty_struct *tty);
 612 
 613 static int      stli_brdinit(void);
 614 static int      stli_initecp(stlibrd_t *brdp, stlconf_t *confp);
 615 static int      stli_initonb(stlibrd_t *brdp, stlconf_t *confp);
 616 static int      stli_initports(stlibrd_t *brdp);
 617 static int      stli_startbrd(stlibrd_t *brdp);
 618 static int      stli_memread(struct inode *ip, struct file *fp, char *buf, int count);
 619 static int      stli_memwrite(struct inode *ip, struct file *fp, const char *buf, int count);
 620 static int      stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
 621 static void     stli_poll(unsigned long arg);
 622 static int      stli_hostcmd(stlibrd_t *brdp, int channr);
 623 static int      stli_initopen(stlibrd_t *brdp, stliport_t *portp);
 624 static int      stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 625 static int      stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait);
 626 static int      stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp);
 627 static void     stli_dohangup(void *arg);
 628 static void     stli_delay(int len);
 629 static int      stli_setport(stliport_t *portp);
 630 static int      stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 631 static void     stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback);
 632 static void     stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp);
 633 static void     stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp);
 634 static void     stli_mkasysigs(asysigs_t *sp, int dtr, int rts);
 635 static long     stli_mktiocm(unsigned long sigvalue);
 636 static void     stli_read(stlibrd_t *brdp, stliport_t *portp);
 637 static void     stli_getserial(stliport_t *portp, struct serial_struct *sp);
 638 static int      stli_setserial(stliport_t *portp, struct serial_struct *sp);
 639 
 640 static void     stli_ecpinit(stlibrd_t *brdp);
 641 static void     stli_ecpenable(stlibrd_t *brdp);
 642 static void     stli_ecpdisable(stlibrd_t *brdp);
 643 static char     *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 644 static void     stli_ecpreset(stlibrd_t *brdp);
 645 static void     stli_ecpintr(stlibrd_t *brdp);
 646 static void     stli_ecpeiinit(stlibrd_t *brdp);
 647 static void     stli_ecpeienable(stlibrd_t *brdp);
 648 static void     stli_ecpeidisable(stlibrd_t *brdp);
 649 static char     *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 650 static void     stli_ecpeireset(stlibrd_t *brdp);
 651 static void     stli_ecpmcenable(stlibrd_t *brdp);
 652 static void     stli_ecpmcdisable(stlibrd_t *brdp);
 653 static char     *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 654 static void     stli_ecpmcreset(stlibrd_t *brdp);
 655 
 656 static void     stli_onbinit(stlibrd_t *brdp);
 657 static void     stli_onbenable(stlibrd_t *brdp);
 658 static void     stli_onbdisable(stlibrd_t *brdp);
 659 static char     *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 660 static void     stli_onbreset(stlibrd_t *brdp);
 661 static void     stli_onbeinit(stlibrd_t *brdp);
 662 static void     stli_onbeenable(stlibrd_t *brdp);
 663 static void     stli_onbedisable(stlibrd_t *brdp);
 664 static char     *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 665 static void     stli_onbereset(stlibrd_t *brdp);
 666 static void     stli_bbyinit(stlibrd_t *brdp);
 667 static char     *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 668 static void     stli_bbyreset(stlibrd_t *brdp);
 669 static void     stli_stalinit(stlibrd_t *brdp);
 670 static char     *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line);
 671 static void     stli_stalreset(stlibrd_t *brdp);
 672 
 673 #if STLI_HIMEMORY
 674 static void *stli_mapbrdmem(unsigned long physaddr, unsigned int size);
 675 #endif
 676 
 677 /*****************************************************************************/
 678 
 679 /*
 680  *      Define the driver info for a user level shared memory device. This
 681  *      device will work sort of like the /dev/kmem device - except that it
 682  *      will give access to the shared memory on the Stallion intelligent
 683  *      board. This is also a very useful debugging tool.
 684  */
 685 static struct file_operations   stli_fsiomem = {
 686         NULL,
 687         stli_memread,
 688         stli_memwrite,
 689         NULL,
 690         NULL,
 691         stli_memioctl,
 692         NULL,
 693         NULL,
 694         NULL,
 695         NULL
 696 };
 697 
 698 /*****************************************************************************/
 699 
 700 /*
 701  *      Define a timer_list entry for our poll routine. The slave board
 702  *      is polled every so often to see if anything needs doing. This is
 703  *      much cheaper on host cpu than using interrupts. It turns out to
 704  *      not increase character latency by much either...
 705  */
 706 static struct timer_list        stli_timerlist = {
 707         NULL, NULL, 0, 0, stli_poll
 708 };
 709 
 710 static int      stli_timeron = 0;
 711 
 712 /*
 713  *      This is hack to allow for the kernel changes made to add_timer
 714  *      in the newer 1.3.X kernels (changed around 1.3.1X).
 715  */
 716 #ifdef LINUX_1_2_X_COMPAT
 717 #define STLI_TIMEOUT    0
 718 #else
 719 #define STLI_TIMEOUT    (jiffies + 1)
 720 #endif
 721 
 722 /*****************************************************************************/
 723 
 724 #ifdef MODULE
 725 
 726 /*
 727  *      Include kernel version number for modules.
 728  */
 729 char    kernel_version[] = UTS_RELEASE;
 730 
 731 int init_module()
     /*  */
 732 {
 733         unsigned long   flags;
 734 
 735 #if DEBUG
 736         printk("init_module()\n");
 737 #endif
 738 
 739         save_flags(flags);
 740         cli();
 741         stli_init(0);
 742         restore_flags(flags);
 743 
 744         return(0);
 745 }
 746 
 747 /*****************************************************************************/
 748 
 749 void cleanup_module()
     /*  */
 750 {
 751         stlibrd_t       *brdp;
 752         stliport_t      *portp;
 753         unsigned long   flags;
 754         int             i, j;
 755 
 756 #if DEBUG
 757         printk("cleanup_module()\n");
 758 #endif
 759 
 760         printk("Unloading %s: version %s\n", stli_drvname, stli_drvversion);
 761 
 762         save_flags(flags);
 763         cli();
 764 
 765 /*
 766  *      Free up all allocated resources used by the ports. This includes
 767  *      memory and interrupts.
 768  */
 769         if (stli_timeron) {
 770                 stli_timeron = 0;
 771                 del_timer(&stli_timerlist);
 772         }
 773 
 774         i = tty_unregister_driver(&stli_serial);
 775         j = tty_unregister_driver(&stli_callout);
 776         if (i || j) {
 777                 printk("STALLION: failed to un-register tty driver, errno=%d,%d\n", -i, -j);
 778                 restore_flags(flags);
 779                 return;
 780         }
 781         if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
 782                 printk("STALLION: failed to un-register serial memory device, errno=%d\n", -i);
 783 
 784         if (stli_tmpwritebuf != (char *) NULL)
 785                 kfree_s(stli_tmpwritebuf, STLI_TXBUFSIZE);
 786         if (stli_txcookbuf != (char *) NULL)
 787                 kfree_s(stli_txcookbuf, STLI_TXBUFSIZE);
 788 
 789         for (i = 0; (i < stli_nrbrds); i++) {
 790                 brdp = &stli_brds[i];
 791                 for (j = 0; (j < STL_MAXPORTS); j++) {
 792                         portp = brdp->ports[j];
 793                         if (portp != (stliport_t *) NULL) {
 794                                 if (portp->tty != (struct tty_struct *) NULL)
 795                                         tty_hangup(portp->tty);
 796                                 kfree_s(portp, sizeof(stliport_t));
 797                         }
 798                 }
 799 
 800 #if STLI_HIMEMORY
 801                 if (((unsigned long) brdp->membase) >= 0x100000)
 802                         vfree(brdp->membase);
 803 #endif
 804                 if ((brdp->brdtype == BRD_ECP) || (brdp->brdtype == BRD_ECPE) || (brdp->brdtype == BRD_ECPMC))
 805                         release_region(brdp->iobase, ECP_IOSIZE);
 806                 else
 807                         release_region(brdp->iobase, ONB_IOSIZE);
 808         }
 809         kfree_s(stli_brds, (sizeof(stlibrd_t) * stli_nrbrds));
 810 
 811         restore_flags(flags);
 812 }
 813 
 814 #endif
 815 
 816 /*****************************************************************************/
 817 
 818 /*
 819  *      Local memory allocation routines. These are used so we can deal with
 820  *      memory allocation at init time and during run-time in a consistent
 821  *      way. Everbody just calls the stli_memalloc routine to allocate
 822  *      memory and it will do the right thing. There is no common memory
 823  *      deallocation code - since this is only done is special cases, all of
 824  *      which are tightly controlled.
 825  */
 826 
 827 #ifndef MODULE
 828 
 829 static void stli_meminit(long base)
     /*  */
 830 {
 831         stli_memend = base;
 832         stli_meminited = 1;
 833 }
 834 
 835 static long stli_memhalt()
     /*  */
 836 {
 837         stli_meminited = 0;
 838         return(stli_memend);
 839 }
 840 
 841 #endif
 842 
 843 static void *stli_memalloc(int len)
     /*  */
 844 {
 845         void    *mem;
 846 
 847         if (stli_meminited) {
 848                 mem = (void *) stli_memend;
 849                 stli_memend += len;
 850         } else {
 851                 mem = (void *) kmalloc(len, GFP_KERNEL);
 852         }
 853         return(mem);
 854 }
 855 
 856 /*****************************************************************************/
 857 
 858 static int stli_open(struct tty_struct *tty, struct file *filp)
     /*  */
 859 {
 860         stlibrd_t       *brdp;
 861         stliport_t      *portp;
 862         unsigned int    minordev;
 863         int             brdnr, portnr, rc;
 864 
 865 #if DEBUG
 866         printk("stli_open(tty=%x,filp=%x): device=%x\n", (int) tty, (int) filp, tty->device);
 867 #endif
 868 
 869         minordev = MINOR(tty->device);
 870         brdnr = MKDEV2BRD(minordev);
 871         if (brdnr >= stli_nrbrds)
 872                 return(-ENODEV);
 873         if (stli_brds == (stlibrd_t *) NULL)
 874                 return(-ENODEV);
 875         brdp = &stli_brds[brdnr];
 876         if ((brdp->state & BST_STARTED) == 0)
 877                 return(-ENODEV);
 878         portnr = MKDEV2PORT(minordev);
 879         if ((portnr < 0) || (portnr > brdp->nrports))
 880                 return(-ENODEV);
 881 
 882         portp = brdp->ports[portnr];
 883         if (portp == (stliport_t *) NULL)
 884                 return(-ENODEV);
 885         if (portp->devnr < 1)
 886                 return(-ENODEV);
 887 
 888 /*
 889  *      Check if this port is in the middle of closing. If so then wait
 890  *      until it is closed then return error status based on flag settings.
 891  *      The sleep here does not need interrupt protection since the wakeup
 892  *      for it is done with the same context.
 893  */
 894         if (portp->flags & ASYNC_CLOSING) {
 895                 interruptible_sleep_on(&portp->close_wait);
 896                 if (portp->flags & ASYNC_HUP_NOTIFY)
 897                         return(-EAGAIN);
 898                 return(-ERESTARTSYS);
 899         }
 900 
 901 /*
 902  *      On the first open of the device setup the port hardware, and
 903  *      initialize the per port data structure. Since initializing the port
 904  *      requires serval commands to the board we will need to wait for any
 905  *      other open that is already initializing the port.
 906  */
 907         portp->tty = tty;
 908         tty->driver_data = portp;
 909         portp->refcount++;
 910 
 911         while (test_bit(ST_INITIALIZING, &portp->state)) {
 912                 if (current->signal & ~current->blocked)
 913                         return(-ERESTARTSYS);
 914                 interruptible_sleep_on(&portp->raw_wait);
 915         }
 916 
 917         if ((portp->flags & ASYNC_INITIALIZED) == 0) {
 918                 set_bit(ST_INITIALIZING, &portp->state);
 919                 if ((rc = stli_initopen(brdp, portp)) >= 0) {
 920                         portp->flags |= ASYNC_INITIALIZED;
 921                         clear_bit(TTY_IO_ERROR, &tty->flags);
 922                 }
 923                 clear_bit(ST_INITIALIZING, &portp->state);
 924                 wake_up_interruptible(&portp->open_wait);
 925                 if (rc < 0)
 926                         return(rc);
 927         }
 928 
 929 /*
 930  *      Check if this port is in the middle of closing. If so then wait
 931  *      until it is closed then return error status, based on flag settings.
 932  *      The sleep here does not need interrupt protection since the wakeup
 933  *      for it is done with the same context.
 934  */
 935         if (portp->flags & ASYNC_CLOSING) {
 936                 interruptible_sleep_on(&portp->close_wait);
 937                 if (portp->flags & ASYNC_HUP_NOTIFY)
 938                         return(-EAGAIN);
 939                 return(-ERESTARTSYS);
 940         }
 941 
 942 /*
 943  *      Based on type of open being done check if it can overlap with any
 944  *      previous opens still in effect. If we are a normal serial device
 945  *      then also we might have to wait for carrier.
 946  */
 947         if (tty->driver.subtype == STL_DRVTYPCALLOUT) {
 948                 if (portp->flags & ASYNC_NORMAL_ACTIVE)
 949                         return(-EBUSY);
 950                 if (portp->flags & ASYNC_CALLOUT_ACTIVE) {
 951                         if ((portp->flags & ASYNC_SESSION_LOCKOUT) &&
 952                                         (portp->session != current->session))
 953                                 return(-EBUSY);
 954                         if ((portp->flags & ASYNC_PGRP_LOCKOUT) &&
 955                                         (portp->pgrp != current->pgrp))
 956                                 return(-EBUSY);
 957                 }
 958                 portp->flags |= ASYNC_CALLOUT_ACTIVE;
 959         } else {
 960                 if (filp->f_flags & O_NONBLOCK) {
 961                         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
 962                                 return(-EBUSY);
 963                 } else {
 964                         if ((rc = stli_waitcarrier(brdp, portp, filp)) != 0)
 965                                 return(rc);
 966                 }
 967                 portp->flags |= ASYNC_NORMAL_ACTIVE;
 968         }
 969 
 970         if ((portp->refcount == 1) && (portp->flags & ASYNC_SPLIT_TERMIOS)) {
 971                 if (tty->driver.subtype == STL_DRVTYPSERIAL)
 972                         *tty->termios = portp->normaltermios;
 973                 else
 974                         *tty->termios = portp->callouttermios;
 975                 stli_setport(portp);
 976         }
 977 
 978         portp->session = current->session;
 979         portp->pgrp = current->pgrp;
 980         return(0);
 981 }
 982 
 983 /*****************************************************************************/
 984 
 985 static void stli_close(struct tty_struct *tty, struct file *filp)
     /*  */
 986 {
 987         stlibrd_t       *brdp;
 988         stliport_t      *portp;
 989         unsigned long   flags;
 990 
 991 #if DEBUG
 992         printk("stli_close(tty=%x,filp=%x)\n", (int) tty, (int) filp);
 993 #endif
 994 
 995         portp = tty->driver_data;
 996         if (portp == (stliport_t *) NULL)
 997                 return;
 998 
 999         save_flags(flags);
1000         cli();
1001         if (tty_hung_up_p(filp)) {
1002                 restore_flags(flags);
1003                 return;
1004         }
1005         if (portp->refcount-- > 1) {
1006                 restore_flags(flags);
1007                 return;
1008         }
1009 
1010         portp->flags |= ASYNC_CLOSING;
1011 
1012         if (portp->flags & ASYNC_NORMAL_ACTIVE)
1013                 portp->normaltermios = *tty->termios;
1014         if (portp->flags & ASYNC_CALLOUT_ACTIVE)
1015                 portp->callouttermios = *tty->termios;
1016 
1017 /*
1018  *      May want to wait for data to drain before closing. The BUSY flag
1019  *      keeps track of whether we are still transmitting or not. It is
1020  *      updated by messages from the slave - indicating when all chars
1021  *      really have drained.
1022  */
1023         if (tty == stli_txcooktty)
1024                 stli_flushchars(tty);
1025         tty->closing = 1;
1026         if (test_bit(ST_TXBUSY, &portp->state)) {
1027                 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1028                         tty_wait_until_sent(tty, portp->closing_wait);
1029         }
1030 
1031         portp->flags &= ~ASYNC_INITIALIZED;
1032         brdp = &stli_brds[portp->brdnr];
1033         stli_rawclose(brdp, portp, 0, 1);
1034         if (tty->termios->c_cflag & HUPCL) {
1035                 stli_mkasysigs(&portp->asig, 0, 0);
1036                 stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1037         }
1038         clear_bit(ST_TXBUSY, &portp->state);
1039         clear_bit(ST_RXSTOP, &portp->state);
1040         set_bit(TTY_IO_ERROR, &tty->flags);
1041         if (tty->ldisc.flush_buffer)
1042                 (tty->ldisc.flush_buffer)(tty);
1043         set_bit(ST_DOFLUSHRX, &portp->state);
1044         stli_flushbuffer(tty);
1045 
1046         tty->closing = 0;
1047         tty->driver_data = (void *) NULL;
1048         portp->tty = (struct tty_struct *) NULL;
1049 
1050         if (portp->openwaitcnt) {
1051                 if (portp->close_delay)
1052                         stli_delay(portp->close_delay);
1053                 wake_up_interruptible(&portp->open_wait);
1054         }
1055 
1056         portp->flags &= ~(ASYNC_CALLOUT_ACTIVE | ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1057         wake_up_interruptible(&portp->close_wait);
1058         restore_flags(flags);
1059 }
1060 
1061 /*****************************************************************************/
1062 
1063 /*
1064  *      Carry out first open operations on a port. This involves a number of
1065  *      commands to be sent to the slave. We need to open the port, set the
1066  *      notification events, set the initial port settings, get and set the
1067  *      initial signal values. We sleep and wait in between each one. But
1068  *      this still all happens pretty quickly.
1069  */
1070 
1071 static int stli_initopen(stlibrd_t *brdp, stliport_t *portp)
     /*  */
1072 {
1073         struct tty_struct       *tty;
1074         asynotify_t             nt;
1075         asyport_t               aport;
1076         int                     rc;
1077 
1078 #if DEBUG
1079         printk("stli_initopen(brdp=%x,portp=%x)\n", (int) brdp, (int) portp);
1080 #endif
1081 
1082         if ((rc = stli_rawopen(brdp, portp, 0, 1)) < 0)
1083                 return(rc);
1084 
1085         memset(&nt, 0, sizeof(asynotify_t));
1086         nt.data = (DT_TXLOW | DT_TXEMPTY | DT_RXBUSY | DT_RXBREAK);
1087         nt.signal = SG_DCD;
1088         if ((rc = stli_cmdwait(brdp, portp, A_SETNOTIFY, &nt, sizeof(asynotify_t), 0)) < 0)
1089                 return(rc);
1090 
1091         tty = portp->tty;
1092         if (tty == (struct tty_struct *) NULL)
1093                 return(-ENODEV);
1094         stli_mkasyport(portp, &aport, tty->termios);
1095         if ((rc = stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0)) < 0)
1096                 return(rc);
1097 
1098         set_bit(ST_GETSIGS, &portp->state);
1099         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig, sizeof(asysigs_t), 1)) < 0)
1100                 return(rc);
1101         if (clear_bit(ST_GETSIGS, &portp->state))
1102                 portp->sigs = stli_mktiocm(portp->asig.sigvalue);
1103         stli_mkasysigs(&portp->asig, 1, 1);
1104         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0)) < 0)
1105                 return(rc);
1106 
1107         return(0);
1108 }
1109 
1110 /*****************************************************************************/
1111 
1112 /*
1113  *      Send an open message to the slave. This will sleep waiting for the
1114  *      acknowledgement, so must have user context. We need to co-ordinate
1115  *      with close events here, since we don't want open and close events
1116  *      to overlap.
1117  */
1118 
1119 static int stli_rawopen(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
     /*  */
1120 {
1121         volatile cdkhdr_t       *hdrp;
1122         volatile cdkctrl_t      *cp;
1123         volatile unsigned char  *bits;
1124         unsigned long           flags;
1125         int                     rc;
1126 
1127 #if DEBUG
1128         printk("stli_rawopen(brdp=%x,portp=%x,arg=%x,wait=%d)\n", (int) brdp, (int) portp, (int) arg, wait);
1129 #endif
1130 
1131 /*
1132  *      Send a message to the slave to open this port.
1133  */
1134         save_flags(flags);
1135         cli();
1136 
1137 /*
1138  *      Slave is already closing this port. This can happen if a hangup
1139  *      occurs on this port. So we must wait until it is complete. The
1140  *      order of opens and closes may not be preserved across shared
1141  *      memory, so we must wait until it is complete.
1142  */
1143         while (test_bit(ST_CLOSING, &portp->state)) {
1144                 if (current->signal & ~current->blocked) {
1145                         restore_flags(flags);
1146                         return(-ERESTARTSYS);
1147                 }
1148                 interruptible_sleep_on(&portp->raw_wait);
1149         }
1150 
1151 /*
1152  *      Everything is ready now, so write the open message into shared
1153  *      memory. Once the message is in set the service bits to say that
1154  *      this port wants service.
1155  */
1156         EBRDENABLE(brdp);
1157         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1158         cp->openarg = arg;
1159         cp->open = 1;
1160         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1161         hdrp->slavereq |= portp->reqbit;
1162         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1163         *bits |= portp->portbit;
1164         EBRDDISABLE(brdp);
1165 
1166         if (wait == 0) {
1167                 restore_flags(flags);
1168                 return(0);
1169         }
1170 
1171 /*
1172  *      Slave is in action, so now we must wait for the open acknowledgment
1173  *      to come back.
1174  */
1175         rc = 0;
1176         set_bit(ST_OPENING, &portp->state);
1177         while (test_bit(ST_OPENING, &portp->state)) {
1178                 if (current->signal & ~current->blocked) {
1179                         rc = -ERESTARTSYS;
1180                         break;
1181                 }
1182                 interruptible_sleep_on(&portp->raw_wait);
1183         }
1184         restore_flags(flags);
1185 
1186         if ((rc == 0) && (portp->rc != 0))
1187                 rc = -EIO;
1188         return(rc);
1189 }
1190 
1191 /*****************************************************************************/
1192 
1193 /*
1194  *      Send a close message to the slave. Normally this will sleep waiting
1195  *      for the acknowledgement, but if wait parameter is 0 it will not. If
1196  *      wait is true then must have user context (to sleep).
1197  */
1198 
1199 static int stli_rawclose(stlibrd_t *brdp, stliport_t *portp, unsigned long arg, int wait)
     /*  */
1200 {
1201         volatile cdkhdr_t       *hdrp;
1202         volatile cdkctrl_t      *cp;
1203         volatile unsigned char  *bits;
1204         unsigned long           flags;
1205         int                     rc;
1206 
1207 #if DEBUG
1208         printk("stli_rawclose(brdp=%x,portp=%x,arg=%x,wait=%d)\n", (int) brdp, (int) portp, (int) arg, wait);
1209 #endif
1210 
1211         save_flags(flags);
1212         cli();
1213 
1214 /*
1215  *      Slave is already closing this port. This can happen if a hangup
1216  *      occurs on this port.
1217  */
1218         if (wait) {
1219                 while (test_bit(ST_CLOSING, &portp->state)) {
1220                         if (current->signal & ~current->blocked) {
1221                                 restore_flags(flags);
1222                                 return(-ERESTARTSYS);
1223                         }
1224                         interruptible_sleep_on(&portp->raw_wait);
1225                 }
1226         }
1227 
1228 /*
1229  *      Write the close command into shared memory.
1230  */
1231         EBRDENABLE(brdp);
1232         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
1233         cp->closearg = arg;
1234         cp->close = 1;
1235         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1236         hdrp->slavereq |= portp->reqbit;
1237         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1238         *bits |= portp->portbit;
1239         EBRDDISABLE(brdp);
1240 
1241         set_bit(ST_CLOSING, &portp->state);
1242         if (wait == 0) {
1243                 restore_flags(flags);
1244                 return(0);
1245         }
1246 
1247 /*
1248  *      Slave is in action, so now we must wait for the open acknowledgment
1249  *      to come back.
1250  */
1251         rc = 0;
1252         while (test_bit(ST_CLOSING, &portp->state)) {
1253                 if (current->signal & ~current->blocked) {
1254                         rc = -ERESTARTSYS;
1255                         break;
1256                 }
1257                 interruptible_sleep_on(&portp->raw_wait);
1258         }
1259         restore_flags(flags);
1260 
1261         if ((rc == 0) && (portp->rc != 0))
1262                 rc = -EIO;
1263         return(rc);
1264 }
1265 
1266 /*****************************************************************************/
1267 
1268 /*
1269  *      Send a command to the slave and wait for the response. This must
1270  *      have user context (it sleeps). This routine is generic in that it
1271  *      can send any type of command. Its purpose is to wait for that command
1272  *      to complete (as opposed to initiating the command then returning).
1273  */
1274 
1275 static int stli_cmdwait(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
     /*  */
1276 {
1277         unsigned long   flags;
1278 
1279 #if DEBUG
1280         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);
1281 #endif
1282 
1283         save_flags(flags);
1284         cli();
1285         while (test_bit(ST_CMDING, &portp->state)) {
1286                 if (current->signal & ~current->blocked) {
1287                         restore_flags(flags);
1288                         return(-ERESTARTSYS);
1289                 }
1290                 interruptible_sleep_on(&portp->raw_wait);
1291         }
1292 
1293         stli_sendcmd(brdp, portp, cmd, arg, size, copyback);
1294 
1295         while (test_bit(ST_CMDING, &portp->state)) {
1296                 if (current->signal & ~current->blocked) {
1297                         restore_flags(flags);
1298                         return(-ERESTARTSYS);
1299                 }
1300                 interruptible_sleep_on(&portp->raw_wait);
1301         }
1302         restore_flags(flags);
1303 
1304         if (portp->rc != 0)
1305                 return(-EIO);
1306         return(0);
1307 }
1308 
1309 /*****************************************************************************/
1310 
1311 /*
1312  *      Send the termios settings for this port to the slave. This sleeps
1313  *      waiting for the command to complete - so must have user context.
1314  */
1315 
1316 static int stli_setport(stliport_t *portp)
     /*  */
1317 {
1318         stlibrd_t       *brdp;
1319         asyport_t       aport;
1320 
1321 #if DEBUG
1322         printk("stli_setport(portp=%x)\n", (int) portp);
1323 #endif
1324 
1325         if (portp == (stliport_t *) NULL)
1326                 return(-ENODEV);
1327         if (portp->tty == (struct tty_struct *) NULL)
1328                 return(-ENODEV);
1329         if ((portp->brdnr < 0) && (portp->brdnr >= stli_nrbrds))
1330                 return(-ENODEV);
1331         brdp = &stli_brds[portp->brdnr];
1332 
1333         stli_mkasyport(portp, &aport, portp->tty->termios);
1334         return(stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0));
1335 }
1336 
1337 /*****************************************************************************/
1338 
1339 /*
1340  *      Wait for a specified delay period, this is not a busy-loop. It will
1341  *      give up the processor while waiting. Unfortunately this has some
1342  *      rather intimate knowledge of the process management stuff.
1343  */
1344 
1345 static void stli_delay(int len)
     /*  */
1346 {
1347 #if DEBUG
1348         printk("stl_delay(len=%d)\n", len);
1349 #endif
1350         if (len > 0) {
1351                 current->state = TASK_INTERRUPTIBLE;
1352                 current->timeout = jiffies + len;
1353                 schedule();
1354         }
1355 }
1356 
1357 /*****************************************************************************/
1358 
1359 /*
1360  *      Possibly need to wait for carrier (DCD signal) to come high. Say
1361  *      maybe because if we are clocal then we don't need to wait...
1362  */
1363 
1364 static int stli_waitcarrier(stlibrd_t *brdp, stliport_t *portp, struct file *filp)
     /*  */
1365 {
1366         unsigned long   flags;
1367         int             rc;
1368 
1369 #if DEBUG
1370         printk("stli_waitcarrier(brdp=%x,portp=%x,filp=%x)\n", (int) brdp, (int) portp, (int) filp);
1371 #endif
1372 
1373         rc = 0;
1374 
1375         save_flags(flags);
1376         cli();
1377         portp->openwaitcnt++;
1378         if (portp->refcount > 0)
1379                 portp->refcount--;
1380 
1381         for (;;) {
1382                 if ((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) {
1383                         stli_mkasysigs(&portp->asig, 1, 1);
1384                         if ((rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0)) < 0)
1385                                 break;
1386                 }
1387                 if (tty_hung_up_p(filp) || ((portp->flags & ASYNC_INITIALIZED) == 0)) {
1388                         if (portp->flags & ASYNC_HUP_NOTIFY)
1389                                 rc = -EBUSY;
1390                         else
1391                                 rc = -ERESTARTSYS;
1392                         break;
1393                 }
1394                 if (((portp->flags & ASYNC_CALLOUT_ACTIVE) == 0) &&
1395                                 ((portp->flags & ASYNC_CLOSING) == 0) &&
1396                                 ((portp->tty->termios->c_cflag & CLOCAL) ||
1397                                 (portp->sigs & TIOCM_CD))) {
1398                         break;
1399                 }
1400                 if (current->signal & ~current->blocked) {
1401                         rc = -ERESTARTSYS;
1402                         break;
1403                 }
1404                 interruptible_sleep_on(&portp->open_wait);
1405         }
1406 
1407         if (! tty_hung_up_p(filp))
1408                 portp->refcount++;
1409         portp->openwaitcnt--;
1410         restore_flags(flags);
1411 
1412         return(rc);
1413 }
1414 
1415 /*****************************************************************************/
1416 
1417 /*
1418  *      Write routine. Take the data and put it in the shared memory ring
1419  *      queue. If port is not already sending chars then need to mark the
1420  *      service bits for this port.
1421  */
1422 
1423 static int stli_write(struct tty_struct *tty, int from_user, const unsigned char *buf, int count)
     /*  */
1424 {
1425         volatile cdkasy_t       *ap;
1426         volatile cdkhdr_t       *hdrp;
1427         volatile unsigned char  *bits;
1428         unsigned char           *shbuf, *chbuf;
1429         stliport_t              *portp;
1430         stlibrd_t               *brdp;
1431         unsigned int            len, stlen, head, tail, size;
1432         unsigned long           flags;
1433 
1434 #if DEBUG
1435         printk("stli_write(tty=%x,from_user=%d,buf=%x,count=%d)\n", (int) tty, from_user, (int) buf, count);
1436 #endif
1437 
1438         if ((tty == (struct tty_struct *) NULL) || (stli_tmpwritebuf == (char *) NULL))
1439                 return(0);
1440         if (tty == stli_txcooktty)
1441                 stli_flushchars(tty);
1442         portp = tty->driver_data;
1443         if (portp == (stliport_t *) NULL)
1444                 return(0);
1445         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1446                 return(0);
1447         brdp = &stli_brds[portp->brdnr];
1448         chbuf = (unsigned char *) buf;
1449 
1450 /*
1451  *      If copying direct from user space we need to be able to handle page
1452  *      faults while we are copying. To do this copy as much as we can now
1453  *      into a kernel buffer. From there we copy it into shared memory. The
1454  *      big problem is that we do not want shared memory enabled when we are
1455  *      sleeping (other boards may be serviced while asleep). Something else
1456  *      to note here is the reading of the tail twice. Since the boards
1457  *      shared memory can be on an 8-bit bus then we need to be very carefull
1458  *      reading 16 bit quantities - since both the board (slave) and host
1459  *      cound be writing and reading at the same time.
1460  */
1461         if (from_user) {
1462                 save_flags(flags);
1463                 cli();
1464                 EBRDENABLE(brdp);
1465                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1466                 head = (unsigned int) ap->txq.head;
1467                 tail = (unsigned int) ap->txq.tail;
1468                 if (tail != ((unsigned int) ap->txq.tail))
1469                         tail = (unsigned int) ap->txq.tail;
1470                 len = (head >= tail) ? (portp->txsize - (head - tail) - 1) : (tail - head - 1);
1471                 count = MIN(len, count);
1472                 EBRDDISABLE(brdp);
1473 
1474                 down(&stli_tmpwritesem);
1475                 memcpy_fromfs(stli_tmpwritebuf, chbuf, count);
1476                 up(&stli_tmpwritesem);
1477                 chbuf = &stli_tmpwritebuf[0];
1478                 restore_flags(flags);
1479         }
1480 
1481 /*
1482  *      All data is now local, shove as much as possible into shared memory.
1483  */
1484         save_flags(flags);
1485         cli();
1486         EBRDENABLE(brdp);
1487         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1488         head = (unsigned int) ap->txq.head;
1489         tail = (unsigned int) ap->txq.tail;
1490         if (tail != ((unsigned int) ap->txq.tail))
1491                 tail = (unsigned int) ap->txq.tail;
1492         size = portp->txsize;
1493         if (head >= tail) {
1494                 len = size - (head - tail) - 1;
1495                 stlen = size - head;
1496         } else {
1497                 len = tail - head - 1;
1498                 stlen = len;
1499         }
1500 
1501         len = MIN(len, count);
1502         count = 0;
1503         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1504 
1505         while (len > 0) {
1506                 stlen = MIN(len, stlen);
1507                 memcpy((shbuf + head), chbuf, stlen);
1508                 chbuf += stlen;
1509                 len -= stlen;
1510                 count += stlen;
1511                 head += stlen;
1512                 if (head >= size) {
1513                         head = 0;
1514                         stlen = tail;
1515                 }
1516         }
1517 
1518         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1519         ap->txq.head = head;
1520         if (test_bit(ST_TXBUSY, &portp->state)) {
1521                 if (ap->changed.data & DT_TXEMPTY)
1522                         ap->changed.data &= ~DT_TXEMPTY;
1523         }
1524         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1525         hdrp->slavereq |= portp->reqbit;
1526         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1527         *bits |= portp->portbit;
1528         set_bit(ST_TXBUSY, &portp->state);
1529 
1530         EBRDDISABLE(brdp);
1531         restore_flags(flags);
1532 
1533         return(count);
1534 }
1535 
1536 /*****************************************************************************/
1537 
1538 /*
1539  *      Output a single character. We put it into a temporary local buffer
1540  *      (for speed) then write out that buffer when the flushchars routine
1541  *      is called. There is a safety catch here so that if some other port
1542  *      writes chars before the current buffer has been, then we write them
1543  *      first them do the new ports.
1544  */
1545 
1546 static void stli_putchar(struct tty_struct *tty, unsigned char ch)
     /*  */
1547 {
1548 #if DEBUG
1549         printk("stli_putchar(tty=%x,ch=%x)\n", (int) tty, (int) ch);
1550 #endif
1551 
1552         if (tty == (struct tty_struct *) NULL)
1553                 return;
1554         if (tty != stli_txcooktty) {
1555                 if (stli_txcooktty != (struct tty_struct *) NULL)
1556                         stli_flushchars(stli_txcooktty);
1557                 stli_txcooktty = tty;
1558         }
1559 
1560         stli_txcookbuf[stli_txcooksize++] = ch;
1561 }
1562 
1563 /*****************************************************************************/
1564 
1565 /*
1566  *      Transfer characters from the local TX cooking buffer to the board.
1567  *      We sort of ignore the tty that gets passed in here. We rely on the
1568  *      info stored with the TX cook buffer to tell us which port to flush
1569  *      the data on. In any case we clean out the TX cook buffer, for re-use
1570  *      by someone else.
1571  */
1572 
1573 static void stli_flushchars(struct tty_struct *tty)
     /*  */
1574 {
1575         volatile cdkhdr_t       *hdrp;
1576         volatile unsigned char  *bits;
1577         volatile cdkasy_t       *ap;
1578         struct tty_struct       *cooktty;
1579         stliport_t              *portp;
1580         stlibrd_t               *brdp;
1581         unsigned int            len, stlen, head, tail, size, count, cooksize;
1582         unsigned char           *buf, *shbuf;
1583         unsigned long           flags;
1584 
1585 #if DEBUG
1586         printk("stli_flushchars(tty=%x)\n", (int) tty);
1587 #endif
1588 
1589         cooksize = stli_txcooksize;
1590         cooktty = stli_txcooktty;
1591         stli_txcooksize = 0;
1592         stli_txcookrealsize = 0;
1593         stli_txcooktty = (struct tty_struct *) NULL;
1594 
1595         if (tty == (struct tty_struct *) NULL)
1596                 return;
1597         if (cooktty == (struct tty_struct *) NULL)
1598                 return;
1599         if (tty != cooktty)
1600                 tty = cooktty;
1601         if (cooksize == 0)
1602                 return;
1603 
1604         portp = tty->driver_data;
1605         if (portp == (stliport_t *) NULL)
1606                 return;
1607         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1608                 return;
1609         brdp = &stli_brds[portp->brdnr];
1610 
1611         save_flags(flags);
1612         cli();
1613         EBRDENABLE(brdp);
1614 
1615         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1616         head = (unsigned int) ap->txq.head;
1617         tail = (unsigned int) ap->txq.tail;
1618         if (tail != ((unsigned int) ap->txq.tail))
1619                 tail = (unsigned int) ap->txq.tail;
1620         size = portp->txsize;
1621         if (head >= tail) {
1622                 len = size - (head - tail) - 1;
1623                 stlen = size - head;
1624         } else {
1625                 len = tail - head - 1;
1626                 stlen = len;
1627         }
1628 
1629         len = MIN(len, cooksize);
1630         count = 0;
1631         shbuf = (char *) EBRDGETMEMPTR(brdp, portp->txoffset);
1632         buf = stli_txcookbuf;
1633 
1634         while (len > 0) {
1635                 stlen = MIN(len, stlen);
1636                 memcpy((shbuf + head), buf, stlen);
1637                 buf += stlen;
1638                 len -= stlen;
1639                 count += stlen;
1640                 head += stlen;
1641                 if (head >= size) {
1642                         head = 0;
1643                         stlen = tail;
1644                 }
1645         }
1646 
1647         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
1648         ap->txq.head = head;
1649 
1650         if (test_bit(ST_TXBUSY, &portp->state)) {
1651                 if (ap->changed.data & DT_TXEMPTY)
1652                         ap->changed.data &= ~DT_TXEMPTY;
1653         }
1654         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
1655         hdrp->slavereq |= portp->reqbit;
1656         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
1657         *bits |= portp->portbit;
1658         set_bit(ST_TXBUSY, &portp->state);
1659 
1660         EBRDDISABLE(brdp);
1661         restore_flags(flags);
1662 }
1663 
1664 /*****************************************************************************/
1665 
1666 static int stli_writeroom(struct tty_struct *tty)
     /*  */
1667 {
1668         volatile cdkasyrq_t     *rp;
1669         stliport_t              *portp;
1670         stlibrd_t               *brdp;
1671         unsigned int            head, tail, len;
1672         unsigned long           flags;
1673 
1674 #if DEBUG
1675         printk("stli_writeroom(tty=%x)\n", (int) tty);
1676 #endif
1677 
1678         if (tty == (struct tty_struct *) NULL)
1679                 return(0);
1680         if (tty == stli_txcooktty) {
1681                 if (stli_txcookrealsize != 0) {
1682                         len = stli_txcookrealsize - stli_txcooksize;
1683                         return(len);
1684                 }
1685         }
1686 
1687         portp = tty->driver_data;
1688         if (portp == (stliport_t *) NULL)
1689                 return(0);
1690         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1691                 return(0);
1692         brdp = &stli_brds[portp->brdnr];
1693 
1694         save_flags(flags);
1695         cli();
1696         EBRDENABLE(brdp);
1697         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1698         head = (unsigned int) rp->head;
1699         tail = (unsigned int) rp->tail;
1700         if (tail != ((unsigned int) rp->tail))
1701                 tail = (unsigned int) rp->tail;
1702         len = (head >= tail) ? (portp->txsize - (head - tail)) : (tail - head);
1703         len--;
1704         EBRDDISABLE(brdp);
1705         restore_flags(flags);
1706 
1707         if (tty == stli_txcooktty) {
1708                 stli_txcookrealsize = len;
1709                 len -= stli_txcooksize;
1710         }
1711         return(len);
1712 }
1713 
1714 /*****************************************************************************/
1715 
1716 /*
1717  *      Return the number of characters in the transmit buffer. Normally we
1718  *      will return the number of chars in the shared memory ring queue.
1719  *      We need to kludge around the case where the shared memory buffer is
1720  *      empty but not all characters have drained yet, for this case just
1721  *      return that there is 1 character in the buffer!
1722  */
1723 
1724 static int stli_charsinbuffer(struct tty_struct *tty)
     /*  */
1725 {
1726         volatile cdkasyrq_t     *rp;
1727         stliport_t              *portp;
1728         stlibrd_t               *brdp;
1729         unsigned int            head, tail, len;
1730         unsigned long           flags;
1731 
1732 #if DEBUG
1733         printk("stli_charsinbuffer(tty=%x)\n", (int) tty);
1734 #endif
1735 
1736         if (tty == (struct tty_struct *) NULL)
1737                 return(0);
1738         if (tty == stli_txcooktty)
1739                 stli_flushchars(tty);
1740         portp = tty->driver_data;
1741         if (portp == (stliport_t *) NULL)
1742                 return(0);
1743         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1744                 return(0);
1745         brdp = &stli_brds[portp->brdnr];
1746 
1747         save_flags(flags);
1748         cli();
1749         EBRDENABLE(brdp);
1750         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->txq;
1751         head = (unsigned int) rp->head;
1752         tail = (unsigned int) rp->tail;
1753         if (tail != ((unsigned int) rp->tail))
1754                 tail = (unsigned int) rp->tail;
1755         len = (head >= tail) ? (head - tail) : (portp->txsize - (tail - head));
1756         if ((len == 0) && test_bit(ST_TXBUSY, &portp->state))
1757                 len = 1;
1758         EBRDDISABLE(brdp);
1759         restore_flags(flags);
1760 
1761         return(len);
1762 }
1763 
1764 /*****************************************************************************/
1765 
1766 /*
1767  *      Generate the serial struct info.
1768  */
1769 
1770 static void stli_getserial(stliport_t *portp, struct serial_struct *sp)
     /*  */
1771 {
1772         struct serial_struct    sio;
1773 
1774 #if DEBUG
1775         printk("stli_getserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1776 #endif
1777 
1778         memset(&sio, 0, sizeof(struct serial_struct));
1779         sio.type = PORT_UNKNOWN;
1780         sio.line = portp->portnr;
1781         sio.port = stli_brdconf[portp->brdnr].ioaddr1;
1782         sio.irq = stli_brdconf[portp->brdnr].irq;
1783         sio.flags = portp->flags;
1784         sio.baud_base = portp->baud_base;
1785         sio.close_delay = portp->close_delay;
1786         sio.closing_wait = portp->closing_wait;
1787         sio.custom_divisor = portp->custom_divisor;
1788         sio.xmit_fifo_size = 0;
1789         sio.hub6 = 0;
1790         memcpy_tofs(sp, &sio, sizeof(struct serial_struct));
1791 }
1792 
1793 /*****************************************************************************/
1794 
1795 /*
1796  *      Set port according to the serial struct info.
1797  *      At this point we do not do any auto-configure stuff, so we will
1798  *      just quietly ignore any requests to change irq, etc.
1799  */
1800 
1801 static int stli_setserial(stliport_t *portp, struct serial_struct *sp)
     /*  */
1802 {
1803         struct serial_struct    sio;
1804         int                     rc;
1805 
1806 #if DEBUG
1807         printk("stli_setserial(portp=%x,sp=%x)\n", (int) portp, (int) sp);
1808 #endif
1809 
1810         memcpy_fromfs(&sio, sp, sizeof(struct serial_struct));
1811         if (!suser()) {
1812                 if ((sio.baud_base != portp->baud_base) ||
1813                                 (sio.close_delay != portp->close_delay) ||
1814                                 ((sio.flags & ~ASYNC_USR_MASK) != (portp->flags & ~ASYNC_USR_MASK)))
1815                         return(-EPERM);
1816         } 
1817 
1818         portp->flags = (portp->flags & ~ASYNC_USR_MASK) | (sio.flags & ASYNC_USR_MASK);
1819         portp->baud_base = sio.baud_base;
1820         portp->close_delay = sio.close_delay;
1821         portp->closing_wait = sio.closing_wait;
1822         portp->custom_divisor = sio.custom_divisor;
1823 
1824         if ((rc = stli_setport(portp)) < 0)
1825                 return(rc);
1826         return(0);
1827 }
1828 
1829 /*****************************************************************************/
1830 
1831 static int stli_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
     /*  */
1832 {
1833         stliport_t      *portp;
1834         stlibrd_t       *brdp;
1835         unsigned long   val;
1836         int             rc;
1837 
1838 #if DEBUG
1839         printk("stli_ioctl(tty=%x,file=%x,cmd=%x,arg=%x)\n", (int) tty, (int) file, cmd, (int) arg);
1840 #endif
1841 
1842         if (tty == (struct tty_struct *) NULL)
1843                 return(-ENODEV);
1844         portp = tty->driver_data;
1845         if (portp == (stliport_t *) NULL)
1846                 return(-ENODEV);
1847         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1848                 return(0);
1849         brdp = &stli_brds[portp->brdnr];
1850 
1851         rc = 0;
1852 
1853         switch (cmd) {
1854         case TCSBRK:
1855                 if ((rc = tty_check_change(tty)) == 0) {
1856                         tty_wait_until_sent(tty, 0);
1857                         if (! arg) {
1858                                 val = 250;
1859                                 rc = stli_cmdwait(brdp, portp, A_BREAK, &val, sizeof(unsigned long), 0);
1860                         }
1861                 }
1862                 break;
1863         case TCSBRKP:
1864                 if ((rc = tty_check_change(tty)) == 0) {
1865                         tty_wait_until_sent(tty, 0);
1866                         val = (arg ? (arg * 100) : 250);
1867                         rc = stli_cmdwait(brdp, portp, A_BREAK, &val, sizeof(unsigned long), 0);
1868                 }
1869                 break;
1870         case TIOCGSOFTCAR:
1871                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(long))) == 0)
1872                         put_fs_long(((tty->termios->c_cflag & CLOCAL) ? 1 : 0), (unsigned long *) arg);
1873                 break;
1874         case TIOCSSOFTCAR:
1875                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1876                         arg = get_fs_long((unsigned long *) arg);
1877                         tty->termios->c_cflag = (tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0);
1878                 }
1879                 break;
1880         case TIOCMGET:
1881                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(unsigned int))) == 0) {
1882                         if ((rc = stli_cmdwait(brdp, portp, A_GETSIGNALS, &portp->asig, sizeof(asysigs_t), 1)) < 0)
1883                                 return(rc);
1884                         val = stli_mktiocm(portp->asig.sigvalue);
1885                         put_fs_long(val, (unsigned long *) arg);
1886                 }
1887                 break;
1888         case TIOCMBIS:
1889                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1890                         arg = get_fs_long((unsigned long *) arg);
1891                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 1 : -1), ((arg & TIOCM_RTS) ? 1 : -1));
1892                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1893                 }
1894                 break;
1895         case TIOCMBIC:
1896                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1897                         arg = get_fs_long((unsigned long *) arg);
1898                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 0 : -1), ((arg & TIOCM_RTS) ? 0 : -1));
1899                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1900                 }
1901                 break;
1902         case TIOCMSET:
1903                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(long))) == 0) {
1904                         arg = get_fs_long((unsigned long *) arg);
1905                         stli_mkasysigs(&portp->asig, ((arg & TIOCM_DTR) ? 1 : 0), ((arg & TIOCM_RTS) ? 1 : 0));
1906                         rc = stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1907                 }
1908                 break;
1909         case TIOCGSERIAL:
1910                 if ((rc = verify_area(VERIFY_WRITE, (void *) arg, sizeof(struct serial_struct))) == 0)
1911                         stli_getserial(portp, (struct serial_struct *) arg);
1912                 break;
1913         case TIOCSSERIAL:
1914                 if ((rc = verify_area(VERIFY_READ, (void *) arg, sizeof(struct serial_struct))) == 0)
1915                         rc = stli_setserial(portp, (struct serial_struct *) arg);
1916                 break;
1917         case TIOCSERCONFIG:
1918         case TIOCSERGWILD:
1919         case TIOCSERSWILD:
1920         case TIOCSERGETLSR:
1921         case TIOCSERGSTRUCT:
1922         case TIOCSERGETMULTI:
1923         case TIOCSERSETMULTI:
1924         default:
1925                 rc = -ENOIOCTLCMD;
1926                 break;
1927         }
1928 
1929         return(rc);
1930 }
1931 
1932 /*****************************************************************************/
1933 
1934 /*
1935  *      This routine assumes that we have user context and can sleep.
1936  *      Looks like it is true for the current ttys implementation..!!
1937  */
1938 
1939 static void stli_settermios(struct tty_struct *tty, struct termios *old)
     /*  */
1940 {
1941         stliport_t      *portp;
1942         stlibrd_t       *brdp;
1943         struct termios  *tiosp;
1944         asyport_t       aport;
1945 
1946 #if DEBUG
1947         printk("stli_settermios(tty=%x,old=%x)\n", (int) tty, (int) old);
1948 #endif
1949 
1950         if (tty == (struct tty_struct *) NULL)
1951                 return;
1952         portp = tty->driver_data;
1953         if (portp == (stliport_t *) NULL)
1954                 return;
1955         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
1956                 return;
1957         brdp = &stli_brds[portp->brdnr];
1958 
1959         tiosp = tty->termios;
1960         if ((tiosp->c_cflag == old->c_cflag) && (tiosp->c_iflag == old->c_iflag))
1961                 return;
1962 
1963         stli_mkasyport(portp, &aport, tiosp);
1964         stli_cmdwait(brdp, portp, A_SETPORT, &aport, sizeof(asyport_t), 0);
1965         stli_mkasysigs(&portp->asig, ((tiosp->c_cflag & CBAUD) ? 1 : 0), -1);
1966         stli_cmdwait(brdp, portp, A_SETSIGNALS, &portp->asig, sizeof(asysigs_t), 0);
1967         if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0))
1968                 tty->hw_stopped = 0;
1969         if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1970                 wake_up_interruptible(&portp->open_wait);
1971 }
1972 
1973 /*****************************************************************************/
1974 
1975 /*
1976  *      Attempt to flow control who ever is sending us data. We won't really
1977  *      do any flow control action here. We can't directly, and even if we
1978  *      wanted to we would have to send a command to the slave. The slave
1979  *      knows how to flow control, and will do so when its buffers reach its
1980  *      internal high water marks. So what we will do is set a local state
1981  *      bit that will stop us sending any RX data up from the poll routine
1982  *      (which is the place where RX data from the slave is handled).
1983  */
1984 
1985 static void stli_throttle(struct tty_struct *tty)
     /*  */
1986 {
1987         stliport_t      *portp;
1988 
1989 #if DEBUG
1990         printk("stli_throttle(tty=%x)\n", (int) tty);
1991 #endif
1992 
1993         if (tty == (struct tty_struct *) NULL)
1994                 return;
1995         portp = tty->driver_data;
1996         if (portp == (stliport_t *) NULL)
1997                 return;
1998 
1999         set_bit(ST_RXSTOP, &portp->state);
2000 }
2001 
2002 /*****************************************************************************/
2003 
2004 /*
2005  *      Unflow control the device sending us data... That means that all
2006  *      we have to do is clear the RXSTOP state bit. The next poll call
2007  *      will then be able to pass the RX data back up.
2008  */
2009 
2010 static void stli_unthrottle(struct tty_struct *tty)
     /*  */
2011 {
2012         stliport_t      *portp;
2013 
2014 #if DEBUG
2015         printk("stli_unthrottle(tty=%x)\n", (int) tty);
2016 #endif
2017 
2018         if (tty == (struct tty_struct *) NULL)
2019                 return;
2020         portp = tty->driver_data;
2021         if (portp == (stliport_t *) NULL)
2022                 return;
2023 
2024         clear_bit(ST_RXSTOP, &portp->state);
2025 }
2026 
2027 /*****************************************************************************/
2028 
2029 /*
2030  *      Stop the transmitter. Basically to do this we will just turn TX
2031  *      interrupts off.
2032  */
2033 
2034 static void stli_stop(struct tty_struct *tty)
     /*  */
2035 {
2036         stlibrd_t       *brdp;
2037         stliport_t      *portp;
2038         asyctrl_t       actrl;
2039 
2040 #if DEBUG
2041         printk("stli_stop(tty=%x)\n", (int) tty);
2042 #endif
2043 
2044         if (tty == (struct tty_struct *) NULL)
2045                 return;
2046         portp = tty->driver_data;
2047         if (portp == (stliport_t *) NULL)
2048                 return;
2049         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2050                 return;
2051         brdp = &stli_brds[portp->brdnr];
2052 
2053         memset(&actrl, 0, sizeof(asyctrl_t));
2054         actrl.txctrl = CT_STOPFLOW;
2055 #if 0
2056         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t));
2057 #endif
2058 }
2059 
2060 /*****************************************************************************/
2061 
2062 /*
2063  *      Start the transmitter again. Just turn TX interrupts back on.
2064  */
2065 
2066 static void stli_start(struct tty_struct *tty)
     /*  */
2067 {
2068         stliport_t      *portp;
2069         stlibrd_t       *brdp;
2070         asyctrl_t       actrl;
2071 
2072 #if DEBUG
2073         printk("stli_start(tty=%x)\n", (int) tty);
2074 #endif
2075 
2076         if (tty == (struct tty_struct *) NULL)
2077                 return;
2078         portp = tty->driver_data;
2079         if (portp == (stliport_t *) NULL)
2080                 return;
2081         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2082                 return;
2083         brdp = &stli_brds[portp->brdnr];
2084 
2085         memset(&actrl, 0, sizeof(asyctrl_t));
2086         actrl.txctrl = CT_STARTFLOW;
2087 #if 0
2088         stli_cmdwait(brdp, portp, A_PORTCTRL, &actrl, sizeof(asyctrl_t));
2089 #endif
2090 }
2091 
2092 /*****************************************************************************/
2093 
2094 /*
2095  *      Scheduler called hang up routine. This is called from the scheduler,
2096  *      not direct from the driver "poll" routine. We can't call it there
2097  *      since the real local hangup code will enable/disable the board and
2098  *      other things that we can't do while handling the poll. Much easier
2099  *      to deal with it some time later (don't really care when, hangups
2100  *      aren't that time critical).
2101  */
2102 
2103 static void stli_dohangup(void *arg)
     /*  */
2104 {
2105         stliport_t      *portp;
2106 
2107 #if DEBUG
2108         printk("stli_dohangup(portp=%x)\n", (int) arg);
2109 #endif
2110 
2111         portp = (stliport_t *) arg;
2112         if (portp == (stliport_t *) NULL)
2113                 return;
2114         if (portp->tty == (struct tty_struct *) NULL)
2115                 return;
2116         tty_hangup(portp->tty);
2117 }
2118 
2119 /*****************************************************************************/
2120 
2121 /*
2122  *      Hangup this port. This is pretty much like closing the port, only
2123  *      a little more brutal. No waiting for data to drain. Shutdown the
2124  *      port and maybe drop signals. This is rather tricky really. We want
2125  *      to close the port as well.
2126  */
2127 
2128 static void stli_hangup(struct tty_struct *tty)
     /*  */
2129 {
2130         stliport_t      *portp;
2131         stlibrd_t       *brdp;
2132         unsigned long   flags;
2133 
2134 #if DEBUG
2135         printk("stli_hangup(tty=%x)\n", (int) tty);
2136 #endif
2137 
2138         if (tty == (struct tty_struct *) NULL)
2139                 return;
2140         portp = tty->driver_data;
2141         if (portp == (stliport_t *) NULL)
2142                 return;
2143         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2144                 return;
2145         brdp = &stli_brds[portp->brdnr];
2146 
2147         portp->flags &= ~ASYNC_INITIALIZED;
2148 
2149         save_flags(flags);
2150         cli();
2151         if (! test_bit(ST_CLOSING, &portp->state))
2152                 stli_rawclose(brdp, portp, 0, 0);
2153         if (tty->termios->c_cflag & HUPCL) {
2154                 stli_mkasysigs(&portp->asig, 0, 0);
2155                 if (test_bit(ST_CMDING, &portp->state)) {
2156                         set_bit(ST_DOSIGS, &portp->state);
2157                         set_bit(ST_DOFLUSHTX, &portp->state);
2158                         set_bit(ST_DOFLUSHRX, &portp->state);
2159                 } else {
2160                         stli_sendcmd(brdp, portp, A_SETSIGNALSF, &portp->asig, sizeof(asysigs_t), 0);
2161                 }
2162         }
2163         restore_flags(flags);
2164 
2165         clear_bit(ST_TXBUSY, &portp->state);
2166         clear_bit(ST_RXSTOP, &portp->state);
2167         set_bit(TTY_IO_ERROR, &tty->flags);
2168         tty->driver_data = (void *) NULL;
2169         portp->tty = (struct tty_struct *) NULL;
2170         portp->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CALLOUT_ACTIVE);
2171         portp->refcount = 0;
2172         wake_up_interruptible(&portp->open_wait);
2173 }
2174 
2175 /*****************************************************************************/
2176 
2177 /*
2178  *      Flush characters from the lower buffer. We may not have user context
2179  *      so we cannot sleep waiting for it to complete. Also we need to check
2180  *      if there is chars for this port in the TX cook buffer, and flush them
2181  *      as well.
2182  */
2183 
2184 static void stli_flushbuffer(struct tty_struct *tty)
     /*  */
2185 {
2186         stliport_t      *portp;
2187         stlibrd_t       *brdp;
2188         unsigned long   ftype, flags;
2189 
2190 #if DEBUG
2191         printk("stli_flushbuffer(tty=%x)\n", (int) tty);
2192 #endif
2193 
2194         if (tty == (struct tty_struct *) NULL)
2195                 return;
2196         portp = tty->driver_data;
2197         if (portp == (stliport_t *) NULL)
2198                 return;
2199         if ((portp->brdnr < 0) || (portp->brdnr >= stli_nrbrds))
2200                 return;
2201         brdp = &stli_brds[portp->brdnr];
2202 
2203         save_flags(flags);
2204         cli();
2205         if (tty == stli_txcooktty) {
2206                 stli_txcooktty = (struct tty_struct *) NULL;
2207                 stli_txcooksize = 0;
2208                 stli_txcookrealsize = 0;
2209         }
2210         if (test_bit(ST_CMDING, &portp->state)) {
2211                 set_bit(ST_DOFLUSHTX, &portp->state);
2212         } else {
2213                 ftype = FLUSHTX;
2214                 if (test_bit(ST_DOFLUSHRX, &portp->state)) {
2215                         ftype |= FLUSHRX;
2216                         clear_bit(ST_DOFLUSHRX, &portp->state);
2217                 }
2218                 stli_sendcmd(brdp, portp, A_FLUSH, &ftype, sizeof(unsigned long), 0);
2219         }
2220         restore_flags(flags);
2221 
2222         wake_up_interruptible(&tty->write_wait);
2223         if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
2224                 (tty->ldisc.write_wakeup)(tty);
2225 }
2226 
2227 /*****************************************************************************/
2228 
2229 /*
2230  *      Generic send command routine. This will send a message to the slave,
2231  *      of the specified type with the specified argument. Must be very
2232  *      carefull of data that will be copied out from shared memory -
2233  *      containing command results. The command completion is all done from
2234  *      a poll routine that does not have user coontext. Therefore you cannot
2235  *      copy back directly into user space, or to the kernel stack. This
2236  *      routine does not sleep, so can be called from anywhere.
2237  */
2238 
2239 static void stli_sendcmd(stlibrd_t *brdp, stliport_t *portp, unsigned long cmd, void *arg, int size, int copyback)
     /*  */
2240 {
2241         volatile cdkhdr_t       *hdrp;
2242         volatile cdkctrl_t      *cp;
2243         volatile unsigned char  *bits;
2244         unsigned long           flags;
2245 
2246 #if DEBUG
2247         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);
2248 #endif
2249 
2250         if (test_bit(ST_CMDING, &portp->state)) {
2251                 printk("STALLION: command already busy, cmd=%x!\n", (int) cmd);
2252                 return;
2253         }
2254 
2255         save_flags(flags);
2256         cli();
2257         EBRDENABLE(brdp);
2258         cp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->ctrl;
2259         if (size > 0) {
2260                 memcpy((void *) &(cp->args[0]), arg, size);
2261                 if (copyback) {
2262                         portp->argp = arg;
2263                         portp->argsize = size;
2264                 }
2265         }
2266         cp->status = 0;
2267         cp->cmd = cmd;
2268         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2269         hdrp->slavereq |= portp->reqbit;
2270         bits = ((volatile unsigned char *) hdrp) + brdp->slaveoffset + portp->portidx;
2271         *bits |= portp->portbit;
2272         set_bit(ST_CMDING, &portp->state);
2273         EBRDDISABLE(brdp);
2274         restore_flags(flags);
2275 }
2276 
2277 /*****************************************************************************/
2278 
2279 /*
2280  *      Read data from shared memory. This assumes that the shared memory
2281  *      is enabled and that interrupts are off. Basically we just empty out
2282  *      the shared memory buffer into the tty buffer. Must be carefull to
2283  *      handle the case where we fill up the tty buffer, but still have
2284  *      more chars to unload.
2285  */
2286 
2287 static inline void stli_read(stlibrd_t *brdp, stliport_t *portp)
     /*  */
2288 {
2289         volatile cdkasyrq_t     *rp;
2290         volatile char           *shbuf;
2291         struct tty_struct       *tty;
2292         unsigned int            head, tail, size;
2293         unsigned int            len, stlen;
2294 
2295 #if DEBUG
2296         printk("stli_read(brdp=%x,portp=%d)\n", (int) brdp, (int) portp);
2297 #endif
2298 
2299         if (test_bit(ST_RXSTOP, &portp->state))
2300                 return;
2301         tty = portp->tty;
2302         if (tty == (struct tty_struct *) NULL)
2303                 return;
2304 
2305         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2306         head = (unsigned int) rp->head;
2307         if (head != ((unsigned int) rp->head))
2308                 head = (unsigned int) rp->head;
2309         tail = (unsigned int) rp->tail;
2310         size = portp->rxsize;
2311         if (head >= tail) {
2312                 len = head - tail;
2313                 stlen = len;
2314         } else {
2315                 len = size - (tail - head);
2316                 stlen = size - tail;
2317         }
2318 
2319         len = MIN(len, (TTY_FLIPBUF_SIZE - tty->flip.count));
2320         shbuf = (volatile char *) EBRDGETMEMPTR(brdp, portp->rxoffset);
2321 
2322         while (len > 0) {
2323                 stlen = MIN(len, stlen);
2324                 memcpy(tty->flip.char_buf_ptr, (char *) (shbuf + tail), stlen);
2325                 memset(tty->flip.flag_buf_ptr, 0, stlen);
2326                 tty->flip.char_buf_ptr += stlen;
2327                 tty->flip.flag_buf_ptr += stlen;
2328                 tty->flip.count += stlen;
2329 
2330                 len -= stlen;
2331                 tail += stlen;
2332                 if (tail >= size) {
2333                         tail = 0;
2334                         stlen = head;
2335                 }
2336         }
2337         rp = &((volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr))->rxq;
2338         rp->tail = tail;
2339 
2340         if (head != tail)
2341                 set_bit(ST_RXING, &portp->state);
2342 
2343         tty_schedule_flip(tty);
2344 }
2345 
2346 /*****************************************************************************/
2347 
2348 /*
2349  *      Set up and carry out any delayed commands. There is only a small set
2350  *      of slave commands that can be done "off-level". So it is not too
2351  *      difficult to deal with them here.
2352  */
2353 
2354 static inline void stli_dodelaycmd(stliport_t *portp, volatile cdkctrl_t *cp)
     /*  */
2355 {
2356         int     cmd;
2357 
2358         if (test_bit(ST_DOSIGS, &portp->state)) {
2359                 if (test_bit(ST_DOFLUSHTX, &portp->state) && test_bit(ST_DOFLUSHRX, &portp->state))
2360                         cmd = A_SETSIGNALSF;
2361                 else if (test_bit(ST_DOFLUSHTX, &portp->state))
2362                         cmd = A_SETSIGNALSFTX;
2363                 else if (test_bit(ST_DOFLUSHRX, &portp->state))
2364                         cmd = A_SETSIGNALSFRX;
2365                 else
2366                         cmd = A_SETSIGNALS;
2367                 clear_bit(ST_DOFLUSHTX, &portp->state);
2368                 clear_bit(ST_DOFLUSHRX, &portp->state);
2369                 clear_bit(ST_DOSIGS, &portp->state);
2370                 memcpy((void *) &(cp->args[0]), (void *) &portp->asig, sizeof(asysigs_t));
2371                 cp->status = 0;
2372                 cp->cmd = cmd;
2373                 set_bit(ST_CMDING, &portp->state);
2374         } else if (test_bit(ST_DOFLUSHTX, &portp->state) || test_bit(ST_DOFLUSHRX, &portp->state)) {
2375                 cmd = ((test_bit(ST_DOFLUSHTX, &portp->state)) ? FLUSHTX : 0);
2376                 cmd |= ((test_bit(ST_DOFLUSHRX, &portp->state)) ? FLUSHRX : 0);
2377                 clear_bit(ST_DOFLUSHTX, &portp->state);
2378                 clear_bit(ST_DOFLUSHRX, &portp->state);
2379                 memcpy((void *) &(cp->args[0]), (void *) &cmd, sizeof(int));
2380                 cp->status = 0;
2381                 cp->cmd = A_FLUSH;
2382                 set_bit(ST_CMDING, &portp->state);
2383         }
2384 }
2385 
2386 /*****************************************************************************/
2387 
2388 /*
2389  *      Host command service checking. This handles commands or messages
2390  *      coming from the slave to the host. Must have board shared memory
2391  *      enabled and interrupts off when called. Notice that by servicing the
2392  *      read data last we don't need to change the shared memory pointer
2393  *      during processing (which is a slow IO operation).
2394  */
2395 
2396 static inline int stli_hostcmd(stlibrd_t *brdp, int channr)
     /*  */
2397 {
2398         volatile cdkasy_t       *ap;
2399         volatile cdkctrl_t      *cp;
2400         struct tty_struct       *tty;
2401         asynotify_t             nt;
2402         stliport_t              *portp;
2403         unsigned long           oldsigs;
2404         int                     rc, donerx;
2405 
2406 #if DEBUG
2407         printk("stli_hostcmd(brdp=%x,channr=%d)\n", (int) brdp, channr);
2408 #endif
2409 
2410         portp = brdp->ports[(channr - 1)];
2411         ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
2412         cp = &ap->ctrl;
2413 
2414 /*
2415  *      Check if we are waiting for an open completion message.
2416  */
2417         if (test_bit(ST_OPENING, &portp->state)) {
2418                 rc = (int) cp->openarg;
2419                 if ((cp->open == 0) && (rc != 0)) {
2420                         if (rc > 0)
2421                                 rc--;
2422                         cp->openarg = 0;
2423                         portp->rc = rc;
2424                         clear_bit(ST_OPENING, &portp->state);
2425                         wake_up_interruptible(&portp->raw_wait);
2426                 }
2427         }
2428 
2429 /*
2430  *      Check if we are waiting for a close completion message.
2431  */
2432         if (test_bit(ST_CLOSING, &portp->state)) {
2433                 rc = (int) cp->closearg;
2434                 if ((cp->close == 0) && (rc != 0)) {
2435                         if (rc > 0)
2436                                 rc--;
2437                         cp->closearg = 0;
2438                         portp->rc = rc;
2439                         clear_bit(ST_CLOSING, &portp->state);
2440                         wake_up_interruptible(&portp->raw_wait);
2441                 }
2442         }
2443 
2444 /*
2445  *      Check if we are waiting for a command completion message. We may
2446  *      need to copy out the command results associated with this command.
2447  */
2448         if (test_bit(ST_CMDING, &portp->state)) {
2449                 rc = cp->status;
2450                 if ((cp->cmd == 0) && (rc != 0)) {
2451                         if (rc > 0)
2452                                 rc--;
2453                         if (portp->argp != (void *) NULL) {
2454                                 memcpy(portp->argp, (void *) &(cp->args[0]), portp->argsize);
2455                                 portp->argp = (void *) NULL;
2456                         }
2457                         cp->status = 0;
2458                         portp->rc = rc;
2459                         clear_bit(ST_CMDING, &portp->state);
2460                         stli_dodelaycmd(portp, cp);
2461                         wake_up_interruptible(&portp->raw_wait);
2462                 }
2463         }
2464 
2465 /*
2466  *      Check for any notification messages ready. This includes lots of
2467  *      different types of events - RX chars ready, RX break received,
2468  *      TX data low or empty in the slave, modem signals changed state.
2469  */
2470         donerx = 0;
2471 
2472         if (ap->notify) {
2473                 nt = ap->changed;
2474                 ap->notify = 0;
2475                 tty = portp->tty;
2476 
2477                 if (nt.signal & SG_DCD) {
2478                         oldsigs = portp->sigs;
2479                         portp->sigs = stli_mktiocm(nt.sigvalue);
2480                         clear_bit(ST_GETSIGS, &portp->state);
2481                         if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
2482                                 wake_up_interruptible(&portp->open_wait);
2483                         if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
2484                                 if (! ((portp->flags & ASYNC_CALLOUT_ACTIVE) &&
2485                                                 (portp->flags & ASYNC_CALLOUT_NOHUP))) {
2486                                         if (tty != (struct tty_struct *) NULL)
2487                                                 queue_task_irq_off(&portp->tqhangup, &tq_scheduler);
2488                                 }
2489                         }
2490                 }
2491 
2492                 if (nt.data & DT_TXEMPTY)
2493                         clear_bit(ST_TXBUSY, &portp->state);
2494                 if (nt.data & (DT_TXEMPTY | DT_TXLOW)) {
2495                         if (tty != (struct tty_struct *) NULL) {
2496                                 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
2497                                         (tty->ldisc.write_wakeup)(tty);
2498                                 wake_up_interruptible(&tty->write_wait);
2499                         }
2500                 }
2501 
2502                 if ((nt.data & DT_RXBREAK) && (portp->rxmarkmsk & BRKINT)) {
2503                         if (tty != (struct tty_struct *) NULL) {
2504                                 if (tty->flip.count < TTY_FLIPBUF_SIZE) {
2505                                         tty->flip.count++;
2506                                         *tty->flip.flag_buf_ptr++ = TTY_BREAK;
2507                                         *tty->flip.char_buf_ptr++ = 0;
2508 #ifndef MODULE
2509                                         if (portp->flags & ASYNC_SAK)
2510                                                 do_SAK(tty);
2511 #endif
2512                                         tty_schedule_flip(tty);
2513                                 }
2514                         }
2515                 }
2516 
2517                 if (nt.data & DT_RXBUSY) {
2518                         donerx++;
2519                         stli_read(brdp, portp);
2520                 }
2521         }
2522 
2523 /*
2524  *      It might seem odd that we are checking for more RX chars here.
2525  *      But, we need to handle the case where the tty buffer was previously
2526  *      filled, but we had more characters to pass up. The slave will not
2527  *      send any more RX notify messages until the RX buffer has been emptied.
2528  *      But it will leave the service bits on (since the buffer is not empty).
2529  *      So from here we can try to process more RX chars.
2530  */
2531         if ((!donerx) && test_bit(ST_RXING, &portp->state)) {
2532                 clear_bit(ST_RXING, &portp->state);
2533                 stli_read(brdp, portp);
2534         }
2535 
2536         return(0);
2537 }
2538 
2539 /*****************************************************************************/
2540 
2541 /*
2542  *      Driver poll routine. This routine polls the boards in use and passes
2543  *      messages back up to host when neccesary. This is actually very
2544  *      CPU efficient, since we will always have the kernel poll clock, it
2545  *      adds only a few cycles when idle (since board service can be
2546  *      determined very easily), but when loaded generates no interrupts
2547  *      (with their expensive associated context change).
2548  */
2549 
2550 static void stli_poll(unsigned long arg)
     /*  */
2551 {
2552         volatile cdkhdr_t       *hdrp;
2553         unsigned char           bits[(STL_MAXCHANS / 8) + 1];
2554         unsigned char           hostreq, slavereq;
2555         stliport_t              *portp;
2556         stlibrd_t               *brdp;
2557         int                     bitpos, bitat, bitsize;
2558         int                     brdnr, channr, nrdevs;
2559 
2560         stli_timerlist.expires = STLI_TIMEOUT;
2561         add_timer(&stli_timerlist);
2562 
2563 /*
2564  *      Check each board and do any servicing required.
2565  */
2566         for (brdnr = 0; (brdnr < stli_nrbrds); brdnr++) {
2567                 brdp = &stli_brds[brdnr];
2568                 if ((brdp->state & BST_STARTED) == 0)
2569                         continue;
2570 
2571                 EBRDENABLE(brdp);
2572                 hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
2573                 hostreq = hdrp->hostreq;
2574                 slavereq = hdrp->slavereq;
2575                 bitsize = brdp->bitsize;
2576                 nrdevs = brdp->nrdevs;
2577 
2578 /*
2579  *              Check if slave wants any service. Basically we try to do as
2580  *              little work as possible here. There are 2 levels of service
2581  *              bits. So if there is nothing to do we bail early. We check
2582  *              8 service bits at a time in the inner loop, so we can bypass
2583  *              the lot if none of them want service.
2584  */
2585                 if (hostreq) {
2586                         memcpy(&bits[0], (((unsigned char *) hdrp) + brdp->hostoffset), bitsize);
2587 
2588                         for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2589                                 if (bits[bitpos] == 0)
2590                                         continue;
2591                                 channr = bitpos * 8;
2592                                 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
2593                                         if (bits[bitpos] & bitat) {
2594                                                 stli_hostcmd(brdp, channr);
2595                                         }
2596                                 }
2597                         }
2598                 }
2599 
2600 /*
2601  *              Check if any of the out-standing host commands have completed.
2602  *              It is a bit unfortunate that we need to check stuff that we
2603  *              initiated!  This ain't pretty, but it needs to be fast.
2604  */
2605                 if (slavereq) {
2606                         slavereq = 0;
2607                         hostreq = 0;
2608                         memcpy(&bits[0], (((unsigned char *) hdrp) + brdp->slaveoffset), bitsize);
2609 
2610                         for (bitpos = 0; (bitpos < bitsize); bitpos++) {
2611                                 if (bits[bitpos] == 0)
2612                                         continue;
2613                                 channr = bitpos * 8;
2614                                 for (bitat = 0x1; (channr < nrdevs); channr++, bitat <<= 1) {
2615                                         if (bits[bitpos] & bitat) {
2616                                                 portp = brdp->ports[(channr - 1)];
2617                                                 if (test_bit(ST_OPENING, &portp->state) ||
2618                                                                 test_bit(ST_CLOSING, &portp->state) ||
2619                                                                 test_bit(ST_CMDING, &portp->state) ||
2620                                                                 test_bit(ST_TXBUSY, &portp->state)) {
2621                                                         slavereq |= portp->reqbit;
2622                                                 } else {
2623                                                         bits[bitpos] &= ~bitat;
2624                                                         hostreq++;
2625                                                 }
2626                                         }
2627                                 }
2628                         }
2629                         hdrp->slavereq = slavereq;
2630                         if (hostreq)
2631                                 memcpy((((unsigned char *) hdrp) + brdp->slaveoffset), &bits[0], bitsize);
2632                 }
2633 
2634                 EBRDDISABLE(brdp);
2635         }
2636 }
2637 
2638 /*****************************************************************************/
2639 
2640 /*
2641  *      Translate the termios settings into the port setting structure of
2642  *      the slave.
2643  */
2644 
2645 static void stli_mkasyport(stliport_t *portp, asyport_t *pp, struct termios *tiosp)
     /*  */
2646 {
2647 #if DEBUG
2648         printk("stli_mkasyport(portp=%x,pp=%x,tiosp=%d)\n", (int) portp, (int) pp, (int) tiosp);
2649 #endif
2650 
2651         memset(pp, 0, sizeof(asyport_t));
2652 
2653 /*
2654  *      Start of by setting the baud, char size, parity and stop bit info.
2655  */
2656         pp->baudout = tiosp->c_cflag & CBAUD;
2657         if (pp->baudout & CBAUDEX) {
2658                 pp->baudout &= ~CBAUDEX;
2659                 if ((pp->baudout < 1) || (pp->baudout > 2))
2660                         tiosp->c_cflag &= ~CBAUDEX;
2661                 else
2662                         pp->baudout += 15;
2663         }
2664         pp->baudout = stli_baudrates[pp->baudout];
2665         if ((tiosp->c_cflag & CBAUD) == B38400) {
2666                 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2667                         pp->baudout = 57600;
2668                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2669                         pp->baudout = 115200;
2670                 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2671                         pp->baudout = (portp->baud_base / portp->custom_divisor);
2672         }
2673         if (pp->baudout > STL_MAXBAUD)
2674                 pp->baudout = STL_MAXBAUD;
2675         pp->baudin = pp->baudout;
2676 
2677         switch (tiosp->c_cflag & CSIZE) {
2678         case CS5:
2679                 pp->csize = 5;
2680                 break;
2681         case CS6:
2682                 pp->csize = 6;
2683                 break;
2684         case CS7:
2685                 pp->csize = 7;
2686                 break;
2687         default:
2688                 pp->csize = 8;
2689                 break;
2690         }
2691 
2692         if (tiosp->c_cflag & CSTOPB)
2693                 pp->stopbs = PT_STOP2;
2694         else
2695                 pp->stopbs = PT_STOP1;
2696 
2697         if (tiosp->c_cflag & PARENB) {
2698                 if (tiosp->c_cflag & PARODD)
2699                         pp->parity = PT_ODDPARITY;
2700                 else
2701                         pp->parity = PT_EVENPARITY;
2702         } else {
2703                 pp->parity = PT_NOPARITY;
2704         }
2705 
2706 /*
2707  *      Set up any flow control options enabled.
2708  */
2709         if (tiosp->c_iflag & IXON) {
2710                 pp->flow |= F_IXON;
2711                 if (tiosp->c_iflag & IXANY)
2712                         pp->flow |= F_IXANY;
2713         }
2714         if (tiosp->c_cflag & CRTSCTS)
2715                 pp->flow |= (F_RTSFLOW | F_CTSFLOW);
2716 
2717         pp->startin = tiosp->c_cc[VSTART];
2718         pp->stopin = tiosp->c_cc[VSTOP];
2719         pp->startout = tiosp->c_cc[VSTART];
2720         pp->stopout = tiosp->c_cc[VSTOP];
2721 
2722 /*
2723  *      Set up the RX char marking mask with those RX error types we must
2724  *      catch. We can get the slave to help us out a little here, it will
2725  *      ignore parity errors and breaks for us, and mark parity errors in
2726  *      the data stream.
2727  */
2728         if (tiosp->c_iflag & IGNPAR)
2729                 pp->iflag |= FI_IGNRXERRS;
2730         if (tiosp->c_iflag & IGNBRK)
2731                 pp->iflag |= FI_IGNBREAK;
2732 
2733         portp->rxmarkmsk = 0;
2734         if (tiosp->c_iflag & (INPCK | PARMRK))
2735                 pp->iflag |= FI_1MARKRXERRS;
2736         if (tiosp->c_iflag & BRKINT)
2737                 portp->rxmarkmsk |= BRKINT;
2738 }
2739 
2740 /*****************************************************************************/
2741 
2742 /*
2743  *      Construct a slave signals structure for setting the DTR and RTS
2744  *      signals as specified.
2745  */
2746 
2747 static void stli_mkasysigs(asysigs_t *sp, int dtr, int rts)
     /*  */
2748 {
2749 #if DEBUG
2750         printk("stli_mkasysigs(sp=%x,dtr=%d,rts=%d)\n", (int) sp, dtr, rts);
2751 #endif
2752 
2753         memset(sp, 0, sizeof(asysigs_t));
2754         if (dtr >= 0) {
2755                 sp->signal |= SG_DTR;
2756                 sp->sigvalue |= ((dtr > 0) ? SG_DTR : 0);
2757         }
2758         if (rts >= 0) {
2759                 sp->signal |= SG_RTS;
2760                 sp->sigvalue |= ((rts > 0) ? SG_RTS : 0);
2761         }
2762 }
2763 
2764 /*****************************************************************************/
2765 
2766 /*
2767  *      Convert the signals returned from the slave into a local TIOCM type
2768  *      signals value. We keep them localy in TIOCM format.
2769  */
2770 
2771 static long stli_mktiocm(unsigned long sigvalue)
     /*  */
2772 {
2773         long    tiocm;
2774 
2775 #if DEBUG
2776         printk("stli_mktiocm(sigvalue=%x)\n", (int) sigvalue);
2777 #endif
2778 
2779         tiocm = 0;
2780         tiocm |= ((sigvalue & SG_DCD) ? TIOCM_CD : 0);
2781         tiocm |= ((sigvalue & SG_CTS) ? TIOCM_CTS : 0);
2782         tiocm |= ((sigvalue & SG_RI) ? TIOCM_RI : 0);
2783         tiocm |= ((sigvalue & SG_DSR) ? TIOCM_DSR : 0);
2784         tiocm |= ((sigvalue & SG_DTR) ? TIOCM_DTR : 0);
2785         tiocm |= ((sigvalue & SG_RTS) ? TIOCM_RTS : 0);
2786         return(tiocm);
2787 }
2788 
2789 /*****************************************************************************/
2790 
2791 /*
2792  *      All panels and ports actually attached have been worked out. All
2793  *      we need to do here is set up the appropriate per port data structures.
2794  */
2795 
2796 static int stli_initports(stlibrd_t *brdp)
     /*  */
2797 {
2798         stliport_t      *portp;
2799         int             i, panelnr, panelport;
2800 
2801 #if DEBUG
2802         printk("stli_initports(brdp=%x)\n", (int) brdp);
2803 #endif
2804 
2805         for (i = 0, panelnr = 0, panelport = 0; (i < brdp->nrports); i++) {
2806                 portp = (stliport_t *) stli_memalloc(sizeof(stliport_t));
2807                 if (portp == (stliport_t *) NULL) {
2808                         printk("STALLION: failed to allocate port structure\n");
2809                         continue;
2810                 }
2811 
2812                 memset(portp, 0, sizeof(stliport_t));
2813                 portp->portnr = i;
2814                 portp->brdnr = brdp->brdnr;
2815                 portp->panelnr = panelnr;
2816                 portp->baud_base = STL_BAUDBASE;
2817                 portp->close_delay = STL_CLOSEDELAY;
2818                 portp->closing_wait = 30 * HZ;
2819                 portp->tqhangup.routine = stli_dohangup;
2820                 portp->tqhangup.data = portp;
2821                 portp->normaltermios = stli_deftermios;
2822                 portp->callouttermios = stli_deftermios;
2823                 panelport++;
2824                 if (panelport >= brdp->panels[panelnr]) {
2825                         panelport = 0;
2826                         panelnr++;
2827                 }
2828                 brdp->ports[i] = portp;
2829         }
2830 
2831         return(0);
2832 }
2833 
2834 /*****************************************************************************/
2835 
2836 /*
2837  *      All the following routines are board specific hardware operations.
2838  */
2839 
2840 static void stli_ecpinit(stlibrd_t *brdp)
     /*  */
2841 {
2842         unsigned long   memconf;
2843 
2844 #if DEBUG
2845         printk("stli_ecpinit(brdp=%d)\n", (int) brdp);
2846 #endif
2847 
2848         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2849         udelay(10);
2850         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2851         udelay(100);
2852 
2853         memconf = (((unsigned long) brdp->membase) & ECP_ATADDRMASK) >> ECP_ATADDRSHFT;
2854         outb(memconf, (brdp->iobase + ECP_ATMEMAR));
2855 }
2856 
2857 /*****************************************************************************/
2858 
2859 static void stli_ecpenable(stlibrd_t *brdp)
     /*  */
2860 {       
2861 #if DEBUG
2862         printk("stli_ecpenable(brdp=%x)\n", (int) brdp);
2863 #endif
2864         outb(ECP_ATENABLE, (brdp->iobase + ECP_ATCONFR));
2865 }
2866 
2867 /*****************************************************************************/
2868 
2869 static void stli_ecpdisable(stlibrd_t *brdp)
     /*  */
2870 {       
2871 #if DEBUG
2872         printk("stli_ecpdisable(brdp=%x)\n", (int) brdp);
2873 #endif
2874         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2875 }
2876 
2877 /*****************************************************************************/
2878 
2879 static char *stli_ecpgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
2880 {       
2881         void            *ptr;
2882         unsigned char   val;
2883 
2884 #if DEBUG
2885         printk("stli_ecpgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
2886 #endif
2887 
2888         if (offset > brdp->memsize) {
2889                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
2890                 ptr = 0;
2891                 val = 0;
2892         } else {
2893                 ptr = brdp->membase + (offset % ECP_ATPAGESIZE);
2894                 val = (unsigned char) (offset / ECP_ATPAGESIZE);
2895         }
2896         outb(val, (brdp->iobase + ECP_ATMEMPR));
2897         return(ptr);
2898 }
2899 
2900 /*****************************************************************************/
2901 
2902 static void stli_ecpreset(stlibrd_t *brdp)
     /*  */
2903 {       
2904 #if DEBUG
2905         printk("stli_ecpreset(brdp=%x)\n", (int) brdp);
2906 #endif
2907 
2908         outb(ECP_ATSTOP, (brdp->iobase + ECP_ATCONFR));
2909         udelay(10);
2910         outb(ECP_ATDISABLE, (brdp->iobase + ECP_ATCONFR));
2911         udelay(500);
2912 }
2913 
2914 /*****************************************************************************/
2915 
2916 static void stli_ecpintr(stlibrd_t *brdp)
     /*  */
2917 {       
2918 #if DEBUG
2919         printk("stli_ecpintr(brdp=%x)\n", (int) brdp);
2920 #endif
2921         outb(0x1, brdp->iobase);
2922 }
2923 
2924 /*****************************************************************************/
2925 
2926 /*
2927  *      The following set of functions act on ECP EISA boards.
2928  */
2929 
2930 static void stli_ecpeiinit(stlibrd_t *brdp)
     /*  */
2931 {
2932         unsigned long   memconf;
2933 
2934 #if DEBUG
2935         printk("stli_ecpeiinit(brdp=%x)\n", (int) brdp);
2936 #endif
2937 
2938         outb(0x1, (brdp->iobase + ECP_EIBRDENAB));
2939         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
2940         udelay(10);
2941         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2942         udelay(500);
2943 
2944         memconf = (((unsigned long) brdp->membase) & ECP_EIADDRMASKL) >> ECP_EIADDRSHFTL;
2945         outb(memconf, (brdp->iobase + ECP_EIMEMARL));
2946         memconf = (((unsigned long) brdp->membase) & ECP_EIADDRMASKH) >> ECP_EIADDRSHFTH;
2947         outb(memconf, (brdp->iobase + ECP_EIMEMARH));
2948 }
2949 
2950 /*****************************************************************************/
2951 
2952 static void stli_ecpeienable(stlibrd_t *brdp)
     /*  */
2953 {       
2954         outb(ECP_EIENABLE, (brdp->iobase + ECP_EICONFR));
2955 }
2956 
2957 /*****************************************************************************/
2958 
2959 static void stli_ecpeidisable(stlibrd_t *brdp)
     /*  */
2960 {       
2961         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2962 }
2963 
2964 /*****************************************************************************/
2965 
2966 static char *stli_ecpeigetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
2967 {       
2968         void            *ptr;
2969         unsigned char   val;
2970 
2971 #if DEBUG
2972         printk("stli_ecpeigetmemptr(brdp=%x,offset=%x,line=%d)\n", (int) brdp, (int) offset, line);
2973 #endif
2974 
2975         if (offset > brdp->memsize) {
2976                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
2977                 ptr = 0;
2978                 val = 0;
2979         } else {
2980                 ptr = brdp->membase + (offset % ECP_EIPAGESIZE);
2981                 if (offset < ECP_EIPAGESIZE)
2982                         val = ECP_EIENABLE;
2983                 else
2984                         val = ECP_EIENABLE | 0x40;
2985         }
2986         outb(val, (brdp->iobase + ECP_EICONFR));
2987         return(ptr);
2988 }
2989 
2990 /*****************************************************************************/
2991 
2992 static void stli_ecpeireset(stlibrd_t *brdp)
     /*  */
2993 {       
2994         outb(ECP_EISTOP, (brdp->iobase + ECP_EICONFR));
2995         udelay(10);
2996         outb(ECP_EIDISABLE, (brdp->iobase + ECP_EICONFR));
2997         udelay(500);
2998 }
2999 
3000 /*****************************************************************************/
3001 
3002 /*
3003  *      The following set of functions act on ECP MCA boards.
3004  */
3005 
3006 static void stli_ecpmcenable(stlibrd_t *brdp)
     /*  */
3007 {       
3008         outb(ECP_MCENABLE, (brdp->iobase + ECP_MCCONFR));
3009 }
3010 
3011 /*****************************************************************************/
3012 
3013 static void stli_ecpmcdisable(stlibrd_t *brdp)
     /*  */
3014 {       
3015         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3016 }
3017 
3018 /*****************************************************************************/
3019 
3020 static char *stli_ecpmcgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3021 {       
3022         void            *ptr;
3023         unsigned char   val;
3024 
3025         if (offset > brdp->memsize) {
3026                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3027                 ptr = 0;
3028                 val = 0;
3029         } else {
3030                 ptr = brdp->membase + (offset % ECP_MCPAGESIZE);
3031                 val = ((unsigned char) (offset / ECP_MCPAGESIZE)) | ECP_MCENABLE;
3032         }
3033         outb(val, (brdp->iobase + ECP_MCCONFR));
3034         return(ptr);
3035 }
3036 
3037 /*****************************************************************************/
3038 
3039 static void stli_ecpmcreset(stlibrd_t *brdp)
     /*  */
3040 {       
3041         outb(ECP_MCSTOP, (brdp->iobase + ECP_MCCONFR));
3042         udelay(10);
3043         outb(ECP_MCDISABLE, (brdp->iobase + ECP_MCCONFR));
3044         udelay(500);
3045 }
3046 
3047 /*****************************************************************************/
3048 
3049 /*
3050  *      The following routines act on ONboards.
3051  */
3052 
3053 static void stli_onbinit(stlibrd_t *brdp)
     /*  */
3054 {
3055         unsigned long   memconf;
3056         int             i;
3057 
3058 #if DEBUG
3059         printk("stli_onbinit(brdp=%d)\n", (int) brdp);
3060 #endif
3061 
3062         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3063         udelay(10);
3064         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3065         for (i = 0; (i < 100); i++)
3066                 udelay(1000);
3067 
3068         memconf = (((unsigned long) brdp->membase) & ONB_ATADDRMASK) >> ONB_ATADDRSHFT;
3069         outb(memconf, (brdp->iobase + ONB_ATMEMAR));
3070         outb(0x1, brdp->iobase);
3071         udelay(1000);
3072 }
3073 
3074 /*****************************************************************************/
3075 
3076 static void stli_onbenable(stlibrd_t *brdp)
     /*  */
3077 {       
3078 #if DEBUG
3079         printk("stli_onbenable(brdp=%x)\n", (int) brdp);
3080 #endif
3081         outb((ONB_ATENABLE | ONB_HIMEMENAB), (brdp->iobase + ONB_ATCONFR));
3082 }
3083 
3084 /*****************************************************************************/
3085 
3086 static void stli_onbdisable(stlibrd_t *brdp)
     /*  */
3087 {       
3088 #if DEBUG
3089         printk("stli_onbdisable(brdp=%x)\n", (int) brdp);
3090 #endif
3091         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3092 }
3093 
3094 /*****************************************************************************/
3095 
3096 static char *stli_onbgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3097 {       
3098         void    *ptr;
3099 
3100 #if DEBUG
3101         printk("stli_onbgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3102 #endif
3103 
3104         if (offset > brdp->memsize) {
3105                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3106                 ptr = 0;
3107         } else {
3108                 ptr = brdp->membase + (offset % ONB_ATPAGESIZE);
3109         }
3110         return(ptr);
3111 }
3112 
3113 /*****************************************************************************/
3114 
3115 static void stli_onbreset(stlibrd_t *brdp)
     /*  */
3116 {       
3117         int     i;
3118 
3119 #if DEBUG
3120         printk("stli_onbreset(brdp=%x)\n", (int) brdp);
3121 #endif
3122 
3123         outb(ONB_ATSTOP, (brdp->iobase + ONB_ATCONFR));
3124         udelay(10);
3125         outb(ONB_ATDISABLE, (brdp->iobase + ONB_ATCONFR));
3126         for (i = 0; (i < 100); i++)
3127                 udelay(1000);
3128 }
3129 
3130 /*****************************************************************************/
3131 
3132 /*
3133  *      The following routines act on ONboard EISA.
3134  */
3135 
3136 static void stli_onbeinit(stlibrd_t *brdp)
     /*  */
3137 {
3138         unsigned long   memconf;
3139         int             i;
3140 
3141 #if DEBUG
3142         printk("stli_onbeinit(brdp=%d)\n", (int) brdp);
3143 #endif
3144 
3145         outb(0x1, (brdp->iobase + ONB_EIBRDENAB));
3146         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3147         udelay(10);
3148         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3149         for (i = 0; (i < 100); i++)
3150                 udelay(1000);
3151 
3152         memconf = (((unsigned long) brdp->membase) & ONB_EIADDRMASKL) >> ONB_EIADDRSHFTL;
3153         outb(memconf, (brdp->iobase + ONB_EIMEMARL));
3154         memconf = (((unsigned long) brdp->membase) & ONB_EIADDRMASKH) >> ONB_EIADDRSHFTH;
3155         outb(memconf, (brdp->iobase + ONB_EIMEMARH));
3156         outb(0x1, brdp->iobase);
3157         udelay(1000);
3158 }
3159 
3160 /*****************************************************************************/
3161 
3162 static void stli_onbeenable(stlibrd_t *brdp)
     /*  */
3163 {       
3164 #if DEBUG
3165         printk("stli_onbeenable(brdp=%x)\n", (int) brdp);
3166 #endif
3167         outb(ONB_EIENABLE, (brdp->iobase + ONB_EICONFR));
3168 }
3169 
3170 /*****************************************************************************/
3171 
3172 static void stli_onbedisable(stlibrd_t *brdp)
     /*  */
3173 {       
3174 #if DEBUG
3175         printk("stli_onbedisable(brdp=%x)\n", (int) brdp);
3176 #endif
3177         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3178 }
3179 
3180 /*****************************************************************************/
3181 
3182 static char *stli_onbegetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3183 {       
3184         void            *ptr;
3185         unsigned char   val;
3186 
3187 #if DEBUG
3188         printk("stli_onbegetmemptr(brdp=%x,offset=%x,line=%d)\n", (int) brdp, (int) offset, line);
3189 #endif
3190 
3191         if (offset > brdp->memsize) {
3192                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3193                 ptr = 0;
3194                 val = 0;
3195         } else {
3196                 ptr = brdp->membase + (offset % ONB_EIPAGESIZE);
3197                 if (offset < ONB_EIPAGESIZE)
3198                         val = ONB_EIENABLE;
3199                 else
3200                         val = ONB_EIENABLE | 0x40;
3201         }
3202         outb(val, (brdp->iobase + ONB_EICONFR));
3203         return(ptr);
3204 }
3205 
3206 /*****************************************************************************/
3207 
3208 static void stli_onbereset(stlibrd_t *brdp)
     /*  */
3209 {       
3210         int     i;
3211 
3212 #if DEBUG
3213         printk("stli_onbereset(brdp=%x)\n", (int) brdp);
3214 #endif
3215 
3216         outb(ONB_EISTOP, (brdp->iobase + ONB_EICONFR));
3217         udelay(10);
3218         outb(ONB_EIDISABLE, (brdp->iobase + ONB_EICONFR));
3219         for (i = 0; (i < 100); i++)
3220                 udelay(1000);
3221 }
3222 
3223 /*****************************************************************************/
3224 
3225 /*
3226  *      The following routines act on Brumby boards.
3227  */
3228 
3229 static void stli_bbyinit(stlibrd_t *brdp)
     /*  */
3230 {
3231         int     i;
3232 
3233 #if DEBUG
3234         printk("stli_bbyinit(brdp=%d)\n", (int) brdp);
3235 #endif
3236 
3237         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3238         udelay(10);
3239         outb(0, (brdp->iobase + BBY_ATCONFR));
3240         for (i = 0; (i < 500); i++)
3241                 udelay(1000);
3242         outb(0x1, brdp->iobase);
3243         udelay(1000);
3244 }
3245 
3246 /*****************************************************************************/
3247 
3248 static char *stli_bbygetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3249 {       
3250         void            *ptr;
3251         unsigned char   val;
3252 
3253 #if DEBUG
3254         printk("stli_bbygetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3255 #endif
3256 
3257         if (offset > brdp->memsize) {
3258                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3259                 ptr = 0;
3260                 val = 0;
3261         } else {
3262                 ptr = brdp->membase + (offset % BBY_PAGESIZE);
3263                 val = (unsigned char) (offset / BBY_PAGESIZE);
3264         }
3265         outb(val, (brdp->iobase + BBY_ATCONFR));
3266         return(ptr);
3267 }
3268 
3269 /*****************************************************************************/
3270 
3271 static void stli_bbyreset(stlibrd_t *brdp)
     /*  */
3272 {       
3273         int     i;
3274 
3275 #if DEBUG
3276         printk("stli_bbyreset(brdp=%x)\n", (int) brdp);
3277 #endif
3278 
3279         outb(BBY_ATSTOP, (brdp->iobase + BBY_ATCONFR));
3280         udelay(10);
3281         outb(0, (brdp->iobase + BBY_ATCONFR));
3282         for (i = 0; (i < 100); i++)
3283                 udelay(1000);
3284 }
3285 
3286 /*****************************************************************************/
3287 
3288 /*
3289  *      The following routines act on original old Stallion boards.
3290  */
3291 
3292 static void stli_stalinit(stlibrd_t *brdp)
     /*  */
3293 {
3294         int     i;
3295 
3296 #if DEBUG
3297         printk("stli_stalinit(brdp=%d)\n", (int) brdp);
3298 #endif
3299 
3300         outb(0x1, brdp->iobase);
3301         for (i = 0; (i < 100); i++)
3302                 udelay(1000);
3303 }
3304 
3305 /*****************************************************************************/
3306 
3307 static char *stli_stalgetmemptr(stlibrd_t *brdp, unsigned long offset, int line)
     /*  */
3308 {       
3309         void    *ptr;
3310 
3311 #if DEBUG
3312         printk("stli_stalgetmemptr(brdp=%x,offset=%x)\n", (int) brdp, (int) offset);
3313 #endif
3314 
3315         if (offset > brdp->memsize) {
3316                 printk("STALLION: shared memory pointer=%x out of range at line=%d(%d), brd=%d\n", (int) offset, line, __LINE__, brdp->brdnr);
3317                 ptr = 0;
3318         } else {
3319                 ptr = brdp->membase + (offset % STAL_PAGESIZE);
3320         }
3321         return(ptr);
3322 }
3323 
3324 /*****************************************************************************/
3325 
3326 static void stli_stalreset(stlibrd_t *brdp)
     /*  */
3327 {       
3328         volatile unsigned long  *vecp;
3329         int                     i;
3330 
3331 #if DEBUG
3332         printk("stli_stalreset(brdp=%x)\n", (int) brdp);
3333 #endif
3334 
3335         vecp = (volatile unsigned long *) (brdp->membase + 0x30);
3336         *vecp = 0xffff0000;
3337         outb(0, brdp->iobase);
3338         for (i = 0; (i < 500); i++)
3339                 udelay(1000);
3340 }
3341 
3342 /*****************************************************************************/
3343 
3344 #if STLI_HIMEMORY
3345  
3346 #define PAGE_IOMEM      __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_PCD)
3347 
3348 /*
3349  *      To support shared memory addresses outside of the lower 1 Mb region
3350  *      we will need to pull some tricks with memory management to map the
3351  *      higher range into kernel virtual address space... Radical stuff...
3352  */
3353 
3354 static void *stli_mapbrdmem(unsigned long physaddr, unsigned int size)
     /*  */
3355 {
3356         void    *virtaddr;
3357         int     rc;
3358 
3359 #if DEBUG
3360         printk("stli_mapbrdmem(physaddr=%x,size=%x)\n", (int) physaddr, size);
3361 #endif
3362 
3363         if ((virtaddr = vmalloc(size)) == (char *) NULL) {
3364                 printk("STALLION: failed to allocate virtual address space, size=%x\n", size);
3365                 return((void *) NULL);
3366         }
3367         if ((rc = remap_page_range((TASK_SIZE + ((unsigned long) virtaddr)), physaddr, size, PAGE_IOMEM))) {
3368                 printk("STALLION: failed to map phyiscal address=%x, errno=%d\n", (int) physaddr, rc);
3369                 return((void *) NULL);
3370         }
3371         return(virtaddr);
3372 }
3373 
3374 #endif
3375 
3376 /*****************************************************************************/
3377 
3378 /*
3379  *      Try to find an ECP board and initialize it. This handles only ECP
3380  *      board types.
3381  */
3382 
3383 static int stli_initecp(stlibrd_t *brdp, stlconf_t *confp)
     /*  */
3384 {
3385         cdkecpsig_t     sig;
3386         cdkecpsig_t     *sigsp;
3387         unsigned int    status, nxtid;
3388         int             panelnr;
3389 
3390 #if DEBUG
3391         printk("stli_initecp(brdp=%x,confp=%x)\n", (int) brdp, (int) confp);
3392 #endif
3393 
3394 /*
3395  *      Based on the specific board type setup the common vars to access
3396  *      and enable shared memory. Set all board specific information now
3397  *      as well.
3398  */
3399         switch (brdp->brdtype) {
3400         case BRD_ECP:
3401                 brdp->iobase = confp->ioaddr1;
3402                 brdp->membase = (void *) confp->memaddr;
3403                 brdp->memsize = ECP_MEMSIZE;
3404                 brdp->pagesize = ECP_ATPAGESIZE;
3405                 brdp->init = stli_ecpinit;
3406                 brdp->enable = stli_ecpenable;
3407                 brdp->reenable = stli_ecpenable;
3408                 brdp->disable = stli_ecpdisable;
3409                 brdp->getmemptr = stli_ecpgetmemptr;
3410                 brdp->intr = stli_ecpintr;
3411                 brdp->reset = stli_ecpreset;
3412                 break;
3413 
3414         case BRD_ECPE:
3415                 brdp->iobase = confp->ioaddr1;
3416                 brdp->membase = (void *) confp->memaddr;
3417                 brdp->memsize = ECP_MEMSIZE;
3418                 brdp->pagesize = ECP_EIPAGESIZE;
3419                 brdp->init = stli_ecpeiinit;
3420                 brdp->enable = stli_ecpeienable;
3421                 brdp->reenable = stli_ecpeienable;
3422                 brdp->disable = stli_ecpeidisable;
3423                 brdp->getmemptr = stli_ecpeigetmemptr;
3424                 brdp->intr = stli_ecpintr;
3425                 brdp->reset = stli_ecpeireset;
3426                 break;
3427 
3428         case BRD_ECPMC:
3429                 brdp->memsize = ECP_MEMSIZE;
3430                 brdp->membase = (void *) confp->memaddr;
3431                 brdp->pagesize = ECP_MCPAGESIZE;
3432                 brdp->iobase = confp->ioaddr1;
3433                 brdp->init = NULL;
3434                 brdp->enable = stli_ecpmcenable;
3435                 brdp->reenable = stli_ecpmcenable;
3436                 brdp->disable = stli_ecpmcdisable;
3437                 brdp->getmemptr = stli_ecpmcgetmemptr;
3438                 brdp->intr = stli_ecpintr;
3439                 brdp->reset = stli_ecpmcreset;
3440                 break;
3441 
3442         default:
3443                 return(-EINVAL);
3444         }
3445 
3446 /*
3447  *      The per-board operations structure is all setup, so now lets go
3448  *      and get the board operational. Firstly initialize board configuration
3449  *      registers. Then if we are using the higher 1Mb support then set up
3450  *      the memory mapping info so we can get at the boards shared memory.
3451  */
3452         EBRDINIT(brdp);
3453 
3454 #if STLI_HIMEMORY
3455         if (confp->memaddr > 0x100000) {
3456                 brdp->membase = stli_mapbrdmem(confp->memaddr, brdp->memsize);
3457                 if (brdp->membase == (void *) NULL)
3458                         return(-ENOMEM);
3459         }
3460 #endif
3461 
3462 /*
3463  *      Now that all specific code is set up, enable the shared memory and
3464  *      look for the a signature area that will tell us exactly what board
3465  *      this is, and what is connected to it.
3466  */
3467         EBRDENABLE(brdp);
3468         sigsp = (cdkecpsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3469         memcpy(&sig, sigsp, sizeof(cdkecpsig_t));
3470         EBRDDISABLE(brdp);
3471 
3472 #if 0
3473         printk("%s(%d): sig-> magic=%x romver=%x panel=%x,%x,%x,%x,%x,%x,%x,%x\n",
3474                 __FILE__, __LINE__, (int) sig.magic, sig.romver, sig.panelid[0],
3475                 (int) sig.panelid[1], (int) sig.panelid[2], (int) sig.panelid[3],
3476                 (int) sig.panelid[4], (int) sig.panelid[5], (int) sig.panelid[6],
3477                 (int) sig.panelid[7]);
3478 #endif
3479 
3480         if (sig.magic != ECP_MAGIC)
3481                 return(-ENODEV);
3482 
3483 /*
3484  *      Scan through the signature looking at the panels connected to the
3485  *      board. Calculate the total number of ports as we go.
3486  */
3487         for (panelnr = 0, nxtid = 0; (panelnr < STL_MAXPANELS); panelnr++) {
3488                 status = sig.panelid[nxtid];
3489                 if ((status & ECH_PNLIDMASK) != nxtid)
3490                         break;
3491                 if (status & ECH_PNL16PORT) {
3492                         brdp->panels[panelnr] = 16;
3493                         brdp->nrports += 16;
3494                         nxtid += 2;
3495                 } else {
3496                         brdp->panels[panelnr] = 8;
3497                         brdp->nrports += 8;
3498                         nxtid++;
3499                 }
3500                 brdp->nrpanels++;
3501         }
3502 
3503         request_region(brdp->iobase, ECP_IOSIZE, "serial(ECP)");
3504         brdp->state |= BST_FOUND;
3505         return(0);
3506 }
3507 
3508 /*****************************************************************************/
3509 
3510 /*
3511  *      Try to find an ONboard, Brumby or Stallion board and initialize it.
3512  *      This handles only these board types.
3513  */
3514 
3515 static int stli_initonb(stlibrd_t *brdp, stlconf_t *confp)
     /*  */
3516 {
3517         cdkonbsig_t     sig;
3518         cdkonbsig_t     *sigsp;
3519         int             i;
3520 
3521 #if DEBUG
3522         printk("stli_initonb(brdp=%x,confp=%x)\n", (int) brdp, (int) confp);
3523 #endif
3524 
3525 /*
3526  *      Based on the specific board type setup the common vars to access
3527  *      and enable shared memory. Set all board specific information now
3528  *      as well.
3529  */
3530         switch (brdp->brdtype) {
3531         case BRD_ONBOARD:
3532         case BRD_ONBOARD32:
3533         case BRD_ONBOARD2:
3534         case BRD_ONBOARD2_32:
3535         case BRD_ONBOARDRS:
3536                 brdp->iobase = confp->ioaddr1;
3537                 brdp->membase = (void *) confp->memaddr;
3538                 brdp->memsize = ONB_MEMSIZE;
3539                 brdp->pagesize = ONB_ATPAGESIZE;
3540                 brdp->init = stli_onbinit;
3541                 brdp->enable = stli_onbenable;
3542                 brdp->reenable = stli_onbenable;
3543                 brdp->disable = stli_onbdisable;
3544                 brdp->getmemptr = stli_onbgetmemptr;
3545                 brdp->intr = stli_ecpintr;
3546                 brdp->reset = stli_onbreset;
3547                 break;
3548 
3549         case BRD_ONBOARDE:
3550                 brdp->iobase = confp->ioaddr1;
3551                 brdp->membase = (void *) confp->memaddr;
3552                 brdp->memsize = ONB_EIMEMSIZE;
3553                 brdp->pagesize = ONB_EIPAGESIZE;
3554                 brdp->init = stli_onbeinit;
3555                 brdp->enable = stli_onbeenable;
3556                 brdp->reenable = stli_onbeenable;
3557                 brdp->disable = stli_onbedisable;
3558                 brdp->getmemptr = stli_onbegetmemptr;
3559                 brdp->intr = stli_ecpintr;
3560                 brdp->reset = stli_onbereset;
3561                 break;
3562 
3563         case BRD_BRUMBY4:
3564         case BRD_BRUMBY8:
3565         case BRD_BRUMBY16:
3566                 brdp->iobase = confp->ioaddr1;
3567                 brdp->membase = (void *) confp->memaddr;
3568                 brdp->memsize = BBY_MEMSIZE;
3569                 brdp->pagesize = BBY_PAGESIZE;
3570                 brdp->init = stli_bbyinit;
3571                 brdp->enable = NULL;
3572                 brdp->reenable = NULL;
3573                 brdp->disable = NULL;
3574                 brdp->getmemptr = stli_bbygetmemptr;
3575                 brdp->intr = stli_ecpintr;
3576                 brdp->reset = stli_bbyreset;
3577                 break;
3578 
3579         case BRD_STALLION:
3580                 brdp->iobase = confp->ioaddr1;
3581                 brdp->membase = (void *) confp->memaddr;
3582                 brdp->memsize = STAL_MEMSIZE;
3583                 brdp->pagesize = STAL_PAGESIZE;
3584                 brdp->init = stli_stalinit;
3585                 brdp->enable = NULL;
3586                 brdp->reenable = NULL;
3587                 brdp->disable = NULL;
3588                 brdp->getmemptr = stli_stalgetmemptr;
3589                 brdp->intr = stli_ecpintr;
3590                 brdp->reset = stli_stalreset;
3591                 break;
3592 
3593         default:
3594                 return(-EINVAL);
3595         }
3596 
3597 /*
3598  *      The per-board operations structure is all setup, so now lets go
3599  *      and get the board operational. Firstly initialize board configuration
3600  *      registers. Then if we are using the higher 1Mb support then set up
3601  *      the memory mapping info so we can get at the boards shared memory.
3602  */
3603         EBRDINIT(brdp);
3604 
3605 #if STLI_HIMEMORY
3606         if (confp->memaddr > 0x100000) {
3607                 brdp->membase = stli_mapbrdmem(confp->memaddr, brdp->memsize);
3608                 if (brdp->membase == (void *) NULL)
3609                         return(-ENOMEM);
3610         }
3611 #endif
3612 
3613 /*
3614  *      Now that all specific code is set up, enable the shared memory and
3615  *      look for the a signature area that will tell us exactly what board
3616  *      this is, and how many ports.
3617  */
3618         EBRDENABLE(brdp);
3619         sigsp = (cdkonbsig_t *) EBRDGETMEMPTR(brdp, CDK_SIGADDR);
3620         memcpy(&sig, sigsp, sizeof(cdkonbsig_t));
3621         EBRDDISABLE(brdp);
3622 
3623 #if 0
3624         printk("%s(%d): sig-> magic=%x:%x:%x:%x romver=%x amask=%x:%x:%x\n",
3625                 __FILE__, __LINE__, sig.magic0, sig.magic1, sig.magic2,
3626                 sig.magic3, sig.romver, sig.amask0, sig.amask1, sig.amask2);
3627 #endif
3628 
3629         if ((sig.magic0 != ONB_MAGIC0) || (sig.magic1 != ONB_MAGIC1) ||
3630                         (sig.magic2 != ONB_MAGIC2) || (sig.magic3 != ONB_MAGIC3))
3631                 return(-ENODEV);
3632 
3633 /*
3634  *      Scan through the signature alive mask and calculate how many ports
3635  *      there are on this board.
3636  */
3637         brdp->nrpanels = 1;
3638         if (sig.amask1) {
3639                 brdp->nrports = 32;
3640         } else {
3641                 for (i = 0; (i < 16); i++) {
3642                         if (((sig.amask0 << i) & 0x8000) == 0)
3643                                 break;
3644                 }
3645                 brdp->nrports = i;
3646         }
3647 
3648         request_region(brdp->iobase, ONB_IOSIZE, "serial(ONB/BBY)");
3649         brdp->state |= BST_FOUND;
3650         return(0);
3651 }
3652 
3653 /*****************************************************************************/
3654 
3655 /*
3656  *      Start up a running board. This routine is only called after the
3657  *      code has been down loaded to the board and is operational. It will
3658  *      read in the memory map, and get the show on the road...
3659  */
3660 
3661 static int stli_startbrd(stlibrd_t *brdp)
     /*  */
3662 {
3663         volatile cdkhdr_t       *hdrp;
3664         volatile cdkmem_t       *memp;
3665         volatile cdkasy_t       *ap;
3666         unsigned long           flags;
3667         stliport_t              *portp;
3668         int                     portnr, nrdevs, i, rc;
3669 
3670 #if DEBUG
3671         printk("stli_startbrd(brdp=%x)\n", (int) brdp);
3672 #endif
3673 
3674         rc = 0;
3675 
3676         save_flags(flags);
3677         cli();
3678         EBRDENABLE(brdp);
3679         hdrp = (volatile cdkhdr_t *) EBRDGETMEMPTR(brdp, CDK_CDKADDR);
3680         nrdevs = hdrp->nrdevs;
3681 
3682 #if 0
3683         printk("%s(%d): CDK version %d.%d.%d --> nrdevs=%d memp=%x hostp=%x slavep=%x\n",
3684                  __FILE__, __LINE__, hdrp->ver_release, hdrp->ver_modification,
3685                  hdrp->ver_fix, nrdevs, (int) hdrp->memp, (int) hdrp->hostp,
3686                  (int) hdrp->slavep);
3687 #endif
3688 
3689         if (nrdevs < (brdp->nrports + 1)) {
3690                 printk("STALLION: slave failed to allocate memory for all devices, devices=%d\n", nrdevs);
3691                 brdp->nrports = nrdevs - 1;
3692         }
3693         brdp->nrdevs = nrdevs;
3694         brdp->hostoffset = hdrp->hostp - CDK_CDKADDR;
3695         brdp->slaveoffset = hdrp->slavep - CDK_CDKADDR;
3696         brdp->bitsize = (nrdevs + 7) / 8;
3697         memp = (volatile cdkmem_t *) hdrp->memp;
3698         if (((unsigned long) memp) > brdp->memsize) {
3699                 printk("STALLION: corrupted shared memory region?\n");
3700                 rc = -EIO;
3701                 goto stli_donestartup;
3702         }
3703         memp = (volatile cdkmem_t *) EBRDGETMEMPTR(brdp, (unsigned long) memp);
3704         if (memp->dtype != TYP_ASYNCTRL) {
3705                 printk("STALLION: no slave control device found\n");
3706                 goto stli_donestartup;
3707         }
3708         memp++;
3709 
3710 /*
3711  *      Cycle through memory allocation of each port. We are guaranteed to
3712  *      have all ports inside the first page of slave window, so no need to
3713  *      change pages while reading memory map.
3714  */
3715         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++, memp++) {
3716                 if (memp->dtype != TYP_ASYNC)
3717                         break;
3718                 portp = brdp->ports[portnr];
3719                 if (portp == (stliport_t *) NULL)
3720                         break;
3721                 portp->devnr = i;
3722                 portp->addr = memp->offset;
3723                 portp->reqbit = (unsigned char) (0x1 << (i * 8 / nrdevs));
3724                 portp->portidx = (unsigned char) (i / 8);
3725                 portp->portbit = (unsigned char) (0x1 << (i % 8));
3726         }
3727 
3728 /*
3729  *      For each port setup a local copy of the RX and TX buffer offsets
3730  *      and sizes. We do this separate from the above, because we need to
3731  *      move the shared memory page...
3732  */
3733         for (i = 1, portnr = 0; (i < nrdevs); i++, portnr++) {
3734                 portp = brdp->ports[portnr];
3735                 if (portp == (stliport_t *) NULL)
3736                         break;
3737                 if (portp->addr == 0)
3738                         break;
3739                 ap = (volatile cdkasy_t *) EBRDGETMEMPTR(brdp, portp->addr);
3740                 if (ap != (volatile cdkasy_t *) NULL) {
3741                         portp->rxsize = ap->rxq.size;
3742                         portp->txsize = ap->txq.size;
3743                         portp->rxoffset = ap->rxq.offset;
3744                         portp->txoffset = ap->txq.offset;
3745                 }
3746         }
3747 
3748 stli_donestartup:
3749         EBRDDISABLE(brdp);
3750         restore_flags(flags);
3751 
3752         if (rc == 0)
3753                 brdp->state |= BST_STARTED;
3754 
3755         if (! stli_timeron) {
3756                 stli_timeron++;
3757                 stli_timerlist.expires = STLI_TIMEOUT;
3758                 add_timer(&stli_timerlist);
3759         }
3760 
3761         return(rc);
3762 }
3763 
3764 /*****************************************************************************/
3765 
3766 /*
3767  *      Scan through all the boards in the configuration and see what we
3768  *      can find.
3769  */
3770 
3771 static int stli_brdinit()
     /*  */
3772 {
3773         stlibrd_t       *brdp;
3774         stlconf_t       *confp;
3775         int             i, j;
3776 
3777 #if DEBUG
3778         printk("stli_brdinit()\n");
3779 #endif
3780 
3781         if (stli_nrbrds > STL_MAXBRDS)
3782                 return(-EINVAL);
3783 
3784         stli_brds = (stlibrd_t *) stli_memalloc((sizeof(stlibrd_t) * stli_nrbrds));
3785         if (stli_brds == (stlibrd_t *) NULL) {
3786                 printk("STALLION: failed to allocate board structures\n");
3787                 return(-ENOMEM);
3788         }
3789         memset(stli_brds, 0, (sizeof(stlibrd_t) * stli_nrbrds));
3790 
3791         for (i = 0; (i < stli_nrbrds); i++) {
3792                 brdp = &stli_brds[i];
3793                 confp = &stli_brdconf[i];
3794                 brdp->brdnr = i;
3795                 brdp->brdtype = confp->brdtype;
3796 
3797                 switch (confp->brdtype) {
3798                 case BRD_ECP:
3799                 case BRD_ECPE:
3800                 case BRD_ECPMC:
3801                         stli_initecp(brdp, confp);
3802                         break;
3803                 case BRD_ONBOARD:
3804                 case BRD_ONBOARDE:
3805                 case BRD_ONBOARD2:
3806                 case BRD_ONBOARD32:
3807                 case BRD_ONBOARD2_32:
3808                 case BRD_ONBOARDRS:
3809                 case BRD_BRUMBY4:
3810                 case BRD_BRUMBY8:
3811                 case BRD_BRUMBY16:
3812                 case BRD_STALLION:
3813                         stli_initonb(brdp, confp);
3814                         break;
3815                 case BRD_EASYIO:
3816                 case BRD_ECH:
3817                 case BRD_ECHMC:
3818                 case BRD_ECHPCI:
3819                         printk("STALLION: %s board type not supported in this driver\n", stli_brdnames[brdp->brdtype]);
3820                         break;
3821                 default:
3822                         printk("STALLION: unit=%d is unknown board type=%d\n", i, confp->brdtype);
3823                         break;
3824                 }
3825 
3826                 if ((brdp->state & BST_FOUND) == 0) {
3827                         printk("STALLION: %s board not found, unit=%d io=%x mem=%x\n", stli_brdnames[brdp->brdtype], i, confp->ioaddr1, (int) confp->memaddr);
3828                         continue;
3829                 }
3830 
3831                 stli_initports(brdp);
3832                 printk("STALLION: %s found, unit=%d io=%x mem=%x nrpanels=%d nrports=%d\n", stli_brdnames[brdp->brdtype], i, confp->ioaddr1, (int) confp->memaddr, brdp->nrpanels, brdp->nrports);
3833         }
3834 
3835 /*
3836  *      All found boards are initialized. Now for a little optimization, if
3837  *      no boards are sharing the "shared memory" regions then we can just
3838  *      leave them all enabled. This is in fact the usual case.
3839  */
3840         stli_shared = 0;
3841         if (stli_nrbrds > 1) {
3842                 for (i = 0; (i < stli_nrbrds); i++) {
3843                         for (j = i + 1; (j < stli_nrbrds); j++) {
3844                                 brdp = &stli_brds[i];
3845                                 if ((brdp->membase >= stli_brds[j].membase) &&
3846                                                 (brdp->membase <= (stli_brds[j].membase + stli_brds[j].memsize - 1))) {
3847                                         stli_shared++;
3848                                         break;
3849                                 }
3850                         }
3851                 }
3852         }
3853 
3854         if (stli_shared == 0) {
3855                 for (i = 0; (i < stli_nrbrds); i++) {
3856                         brdp = &stli_brds[i];
3857                         if (brdp->state & BST_FOUND) {
3858                                 EBRDENABLE(brdp);
3859                                 brdp->enable = NULL;
3860                                 brdp->disable = NULL;
3861                         }
3862                 }
3863         }
3864 
3865         return(0);
3866 }
3867 
3868 /*****************************************************************************/
3869 
3870 /*
3871  *      Code to handle an "staliomem" read operation. This device is the 
3872  *      contents of the board shared memory. It is used for down loading
3873  *      the slave image (and debugging :-)
3874  */
3875 
3876 static int stli_memread(struct inode *ip, struct file *fp, char *buf, int count)
     /*  */
3877 {
3878         unsigned long   flags;
3879         void            *memptr;
3880         stlibrd_t       *brdp;
3881         int             brdnr, size, n;
3882 
3883 #if DEBUG
3884         printk("stli_memread(ip=%x,fp=%x,buf=%x,count=%d)\n", (int) ip, (int) fp, (int) buf, count);
3885 #endif
3886 
3887         brdnr = MINOR(ip->i_rdev);
3888         if (brdnr >= stli_nrbrds)
3889                 return(-ENODEV);
3890         brdp = &stli_brds[brdnr];
3891         if (brdp->state == 0)
3892                 return(-ENODEV);
3893         if (fp->f_pos >= brdp->memsize)
3894                 return(0);
3895 
3896         size = MIN(count, (brdp->memsize - fp->f_pos));
3897 
3898         save_flags(flags);
3899         cli();
3900         EBRDENABLE(brdp);
3901         while (size > 0) {
3902                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
3903                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
3904                 memcpy_tofs(buf, memptr, n);
3905                 fp->f_pos += n;
3906                 buf += n;
3907                 size -= n;
3908         }
3909         EBRDDISABLE(brdp);
3910         restore_flags(flags);
3911 
3912         return(count);
3913 }
3914 
3915 /*****************************************************************************/
3916 
3917 /*
3918  *      Code to handle an "staliomem" write operation. This device is the 
3919  *      contents of the board shared memory. It is used for down loading
3920  *      the slave image (and debugging :-)
3921  */
3922 
3923 static int stli_memwrite(struct inode *ip, struct file *fp, const char *buf, int count)
     /*  */
3924 {
3925         unsigned long   flags;
3926         void            *memptr;
3927         stlibrd_t       *brdp;
3928         char            *chbuf;
3929         int             brdnr, size, n;
3930 
3931 #if DEBUG
3932         printk("stli_memwrite(ip=%x,fp=%x,buf=%x,count=%x)\n", (int) ip, (int) fp, (int) buf, count);
3933 #endif
3934 
3935         brdnr = MINOR(ip->i_rdev);
3936         if (brdnr >= stli_nrbrds)
3937                 return(-ENODEV);
3938         brdp = &stli_brds[brdnr];
3939         if (brdp->state == 0)
3940                 return(-ENODEV);
3941         if (fp->f_pos >= brdp->memsize)
3942                 return(0);
3943 
3944         chbuf = (char *) buf;
3945         size = MIN(count, (brdp->memsize - fp->f_pos));
3946 
3947         save_flags(flags);
3948         cli();
3949         EBRDENABLE(brdp);
3950         while (size > 0) {
3951                 memptr = (void *) EBRDGETMEMPTR(brdp, fp->f_pos);
3952                 n = MIN(size, (brdp->pagesize - (((unsigned long) fp->f_pos) % brdp->pagesize)));
3953                 memcpy_fromfs(memptr, chbuf, n);
3954                 fp->f_pos += n;
3955                 chbuf += n;
3956                 size -= n;
3957         }
3958         EBRDDISABLE(brdp);
3959         restore_flags(flags);
3960 
3961         return(count);
3962 }
3963 
3964 /*****************************************************************************/
3965 
3966 /*
3967  *      The "staliomem" device is also required to do some special operations on
3968  *      the board. We need to be able to send an interrupt to the board,
3969  *      reset it, and start/stop it.
3970  */
3971 
3972 static int stli_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
     /*  */
3973 {
3974         stlibrd_t       *brdp;
3975         int             brdnr, rc;
3976 
3977 #if DEBUG
3978         printk("stli_memioctl(ip=%x,fp=%x,cmd=%x,arg=%x)\n", (int) ip, (int) fp, cmd, (int) arg);
3979 #endif
3980 
3981         brdnr = MINOR(ip->i_rdev);
3982         if (brdnr >= stli_nrbrds)
3983                 return(-ENODEV);
3984         brdp = &stli_brds[brdnr];
3985         if (brdp->state == 0)
3986                 return(-ENODEV);
3987 
3988         rc = 0;
3989 
3990         switch (cmd) {
3991         case STL_BINTR:
3992                 EBRDINTR(brdp);
3993                 break;
3994         case STL_BSTART:
3995                 rc = stli_startbrd(brdp);
3996                 break;
3997         case STL_BSTOP:
3998                 brdp->state &= ~BST_STARTED;
3999                 break;
4000         case STL_BRESET:
4001                 brdp->state &= ~BST_STARTED;
4002                 EBRDRESET(brdp);
4003                 if (stli_shared == 0) {
4004                         if (brdp->reenable != NULL)
4005                                 (* brdp->reenable)(brdp);
4006                 }
4007                 break;
4008         default:
4009                 rc = -ENOIOCTLCMD;
4010                 break;
4011         }
4012 
4013         return(rc);
4014 }
4015 
4016 /*****************************************************************************/
4017 
4018 long stli_init(long kmem_start)
     /*  */
4019 {
4020         printk("%s: version %s\n", stli_drvname, stli_drvversion);
4021 
4022 #ifndef MODULE
4023         stli_meminit(kmem_start);
4024 #endif
4025 
4026         stli_brdinit();
4027 
4028 /*
4029  *      Allocate a temporary write buffer.
4030  */
4031         stli_tmpwritebuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
4032         if (stli_tmpwritebuf == (char *) NULL)
4033                 printk("STALLION: failed to allocate memory (size=%d)\n", STLI_TXBUFSIZE);
4034         stli_txcookbuf = (char *) stli_memalloc(STLI_TXBUFSIZE);
4035         if (stli_txcookbuf == (char *) NULL)
4036                 printk("STALLION: failed to allocate memory (size=%d)\n", STLI_TXBUFSIZE);
4037 
4038 /*
4039  *      Set up a character driver for the shared memory region. We need this
4040  *      to down load the slave code image. Also it is a useful debugging tool.
4041  */
4042         if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stli_fsiomem))
4043                 printk("STALLION: failed to register serial memory device\n");
4044 
4045 /*
4046  *      Set up the tty driver structure and register us as a driver.
4047  *      Also setup the callout tty device.
4048  */
4049         memset(&stli_serial, 0, sizeof(struct tty_driver));
4050         stli_serial.magic = TTY_DRIVER_MAGIC;
4051         stli_serial.name = stli_serialname;
4052         stli_serial.major = STL_SERIALMAJOR;
4053         stli_serial.minor_start = 0;
4054         stli_serial.num = STL_MAXBRDS * STL_MAXPORTS;
4055         stli_serial.type = TTY_DRIVER_TYPE_SERIAL;
4056         stli_serial.subtype = STL_DRVTYPSERIAL;
4057         stli_serial.init_termios = stli_deftermios;
4058         stli_serial.flags = TTY_DRIVER_REAL_RAW;
4059         stli_serial.refcount = &stli_refcount;
4060         stli_serial.table = stli_ttys;
4061         stli_serial.termios = stli_termios;
4062         stli_serial.termios_locked = stli_termioslocked;
4063         
4064         stli_serial.open = stli_open;
4065         stli_serial.close = stli_close;
4066         stli_serial.write = stli_write;
4067         stli_serial.put_char = stli_putchar;
4068         stli_serial.flush_chars = stli_flushchars;
4069         stli_serial.write_room = stli_writeroom;
4070         stli_serial.chars_in_buffer = stli_charsinbuffer;
4071         stli_serial.ioctl = stli_ioctl;
4072         stli_serial.set_termios = stli_settermios;
4073         stli_serial.throttle = stli_throttle;
4074         stli_serial.unthrottle = stli_unthrottle;
4075         stli_serial.stop = stli_stop;
4076         stli_serial.start = stli_start;
4077         stli_serial.hangup = stli_hangup;
4078         stli_serial.flush_buffer = stli_flushbuffer;
4079 
4080         stli_callout = stli_serial;
4081         stli_callout.name = stli_calloutname;
4082         stli_callout.major = STL_CALLOUTMAJOR;
4083         stli_callout.subtype = STL_DRVTYPCALLOUT;
4084 
4085         if (tty_register_driver(&stli_serial))
4086                 printk("STALLION: failed to register serial driver\n");
4087         if (tty_register_driver(&stli_callout))
4088                 printk("STALLION: failed to register callout driver\n");
4089 
4090 #ifndef MODULE
4091         kmem_start = stli_memhalt();
4092 #endif
4093         return(kmem_start);
4094 }
4095 
4096 /*****************************************************************************/
/* */
root/drivers/char/istallion.c

DEFINITIONS
