root/drivers/block/floppy.c

/* [previous][next][first][last][top][bottom][index][help] */

DEFINITIONS

This source file includes following definitions.
  1. __get_order
  2. TYPE
  3. DRIVE
  4. fd_eject
  5. set_debugt
  6. debugt
  7. is_alive
  8. reschedule_timeout
  9. maximum
  10. minimum
  11. disk_change
  12. is_selected
  13. set_dor
  14. twaddle
  15. reset_fdc_info
  16. set_fdc
  17. lock_fdc
  18. unlock_fdc
  19. motor_off_callback
  20. floppy_off
  21. scandrives
  22. fd_watchdog
  23. main_command_interrupt
  24. wait_for_completion
  25. floppy_disable_hlt
  26. floppy_enable_hlt
  27. setup_DMA
  28. wait_til_ready
  29. output_byte
  30. result
  31. need_more_output
  32. perpendicular_mode
  33. fdc_configure
  34. fdc_specify
  35. fdc_dtr
  36. tell_sector
  37. interpret_errors
  38. setup_rw_floppy
  39. seek_interrupt
  40. check_wp
  41. seek_floppy
  42. recal_interrupt
  43. unexpected_floppy_interrupt
  44. floppy_interrupt
  45. recalibrate_floppy
  46. reset_interrupt
  47. reset_fdc
  48. empty
  49. show_floppy
  50. floppy_shutdown
  51. start_motor
  52. floppy_ready
  53. floppy_start
  54. do_wakeup
  55. wait_til_done
  56. generic_done
  57. generic_success
  58. generic_failure
  59. success_and_wakeup
  60. next_valid_format
  61. bad_flp_intr
  62. set_floppy
  63. format_interrupt
  64. setup_format_params
  65. redo_format
  66. do_format
  67. request_done
  68. rw_interrupt
  69. buffer_chain_size
  70. transfer_size
  71. copy_buffer
  72. make_raw_rw_request
  73. redo_fd_request
  74. process_fd_request
  75. do_fd_request
  76. poll_drive
  77. reset_intr
  78. user_reset_fdc
  79. fd_copyout
  80. fd_copyin
  81. drive_name
  82. raw_cmd_done
  83. raw_cmd_copyout
  84. raw_cmd_free
  85. raw_cmd_copyin
  86. raw_cmd_ioctl
  87. invalidate_drive
  88. clear_write_error
  89. set_geometry
  90. normalize_0x02xx_ioctl
  91. xlate_0x00xx_ioctl
  92. fd_ioctl
  93. config_types
  94. floppy_read
  95. floppy_write
  96. floppy_release
  97. floppy_open
  98. check_floppy_change
  99. floppy_revalidate
  100. get_fdc_version
  101. floppy_invert_dcl
  102. daring
  103. set_cmos
  104. floppy_setup
  105. floppy_init
  106. floppy_grab_irq_and_dma
  107. floppy_release_irq_and_dma
  108. parse_floppy_cfg_string
  109. mod_setup
  110. init_module
  111. cleanup_module
  112. floppy_eject
   1 /*
   2  *  linux/kernel/floppy.c
   3  *
   4  *  Copyright (C) 1991, 1992  Linus Torvalds
   5  *  Copyright (C) 1993, 1994  Alain Knaff
   6  */
   7 /*
   8  * 02.12.91 - Changed to static variables to indicate need for reset
   9  * and recalibrate. This makes some things easier (output_byte reset
  10  * checking etc), and means less interrupt jumping in case of errors,
  11  * so the code is hopefully easier to understand.
  12  */
  13 
  14 /*
  15  * This file is certainly a mess. I've tried my best to get it working,
  16  * but I don't like programming floppies, and I have only one anyway.
  17  * Urgel. I should check for more errors, and do more graceful error
  18  * recovery. Seems there are problems with several drives. I've tried to
  19  * correct them. No promises.
  20  */
  21 
  22 /*
  23  * As with hd.c, all routines within this file can (and will) be called
  24  * by interrupts, so extreme caution is needed. A hardware interrupt
  25  * handler may not sleep, or a kernel panic will happen. Thus I cannot
  26  * call "floppy-on" directly, but have to set a special timer interrupt
  27  * etc.
  28  */
  29 
  30 /*
  31  * 28.02.92 - made track-buffering routines, based on the routines written
  32  * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus.
  33  */
  34 
  35 /*
  36  * Automatic floppy-detection and formatting written by Werner Almesberger
  37  * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with
  38  * the floppy-change signal detection.
  39  */
  40 
  41 /*
  42  * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed
  43  * FDC data overrun bug, added some preliminary stuff for vertical
  44  * recording support.
  45  *
  46  * 1992/9/17: Added DMA allocation & DMA functions. -- hhb.
  47  *
  48  * TODO: Errors are still not counted properly.
  49  */
  50 
  51 /* 1992/9/20
  52  * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl)
  53  * modeled after the freeware MS-DOS program fdformat/88 V1.8 by
  54  * Christoph H. Hochst\"atter.
  55  * I have fixed the shift values to the ones I always use. Maybe a new
  56  * ioctl() should be created to be able to modify them.
  57  * There is a bug in the driver that makes it impossible to format a
  58  * floppy as the first thing after bootup.
  59  */
  60 
  61 /*
  62  * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and
  63  * this helped the floppy driver as well. Much cleaner, and still seems to
  64  * work.
  65  */
  66 
  67 /* 1994/6/24 --bbroad-- added the floppy table entries and made
  68  * minor modifications to allow 2.88 floppies to be run.
  69  */
  70 
  71 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more
  72  * disk types.
  73  */
  74 
  75 /*
  76  * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger
  77  * format bug fixes, but unfortunately some new bugs too...
  78  */
  79 
  80 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write
  81  * errors to allow safe writing by specialized programs.
  82  */
  83 
  84 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks
  85  * by defining bit 1 of the "stretch" parameter to mean put sectors on the
  86  * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's
  87  * drives are "upside-down").
  88  */
  89 
  90 /*
  91  * 1995/8/26 -- Andreas Busse -- added Mips support.
  92  */
  93 
  94 /*
  95  * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent
  96  * features to asm/floppy.h.
  97  */
  98 
  99 
 100 #define FLOPPY_SANITY_CHECK
 101 #undef  FLOPPY_SILENT_DCL_CLEAR
 102 
 103 #define REALLY_SLOW_IO
 104 
 105 #define DEBUGT 2
 106 #define DCL_DEBUG /* debug disk change line */
 107 
 108 /* do print messages for unexpected interrupts */
 109 static int print_unex=1;
 110 #include <linux/utsname.h>
 111 #include <linux/module.h>
 112 
 113 /* the following is the mask of allowed drives. By default units 2 and
 114  * 3 of both floppy controllers are disabled, because switching on the
 115  * motor of these drives causes system hangs on some PCI computers. drive
 116  * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if
 117  * a drive is allowed. */
 118 static int FLOPPY_IRQ=6;
 119 static int FLOPPY_DMA=2;
 120 static int allowed_drive_mask = 0x33;
 121  
 122 
 123 #include <linux/sched.h>
 124 #include <linux/fs.h>
 125 #include <linux/kernel.h>
 126 #include <linux/timer.h>
 127 #include <linux/tqueue.h>
 128 #define FDPATCHES
 129 #include <linux/fdreg.h>
 130 
 131 
 132 #include <linux/fd.h>
 133 
 134 
 135 #define OLDFDRAWCMD 0x020d /* send a raw command to the FDC */
 136 
 137 struct old_floppy_raw_cmd {
 138   void *data;
 139   long length;
 140 
 141   unsigned char rate;
 142   unsigned char flags;
 143   unsigned char cmd_count;
 144   unsigned char cmd[9];
 145   unsigned char reply_count;
 146   unsigned char reply[7];
 147   int track;
 148 };
 149 
 150 #include <linux/errno.h>
 151 #include <linux/malloc.h>
 152 #include <linux/mm.h>
 153 #include <linux/string.h>
 154 #include <linux/fcntl.h>
 155 #include <linux/delay.h>
 156 #include <linux/mc146818rtc.h> /* CMOS defines */
 157 #include <linux/ioport.h>
 158 
 159 #include <asm/dma.h>
 160 #include <asm/irq.h>
 161 #include <asm/system.h>
 162 #include <asm/io.h>
 163 #include <asm/segment.h>
 164 
 165 static int use_virtual_dma=0; /* virtual DMA for Intel */
 166 static unsigned short virtual_dma_port=0x3f0;
 167 void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs);
 168 static int set_dor(int fdc, char mask, char data);
 169 static inline int __get_order(unsigned long size);
 170 #include <asm/floppy.h>
 171 
 172 
 173 #define MAJOR_NR FLOPPY_MAJOR
 174 
 175 #include <linux/blk.h>
 176 #include <linux/cdrom.h> /* for the compatibility eject ioctl */
 177 
 178 
 179 #ifndef FLOPPY_MOTOR_MASK
 180 #define FLOPPY_MOTOR_MASK 0xf0
 181 #endif
 182 
 183 #ifndef fd_get_dma_residue
 184 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA)
 185 #endif
 186 
 187 /* Dma Memory related stuff */
 188 
 189 /* Pure 2^n version of get_order */
 190 static inline int __get_order(unsigned long size)
     /* [previous][next][first][last][top][bottom][index][help] */
 191 {
 192         int order;
 193 
 194         size = (size-1) >> (PAGE_SHIFT-1);
 195         order = -1;
 196         do {
 197                 size >>= 1;
 198                 order++;
 199         } while (size);
 200         return order;
 201 }
 202 
 203 #ifndef fd_dma_mem_free
 204 #define fd_dma_mem_free(addr, size) free_pages(addr, __get_order(size))
 205 #endif
 206 
 207 #ifndef fd_dma_mem_alloc
 208 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,__get_order(size))
 209 #endif
 210 
 211 /* End dma memory related stuff */
 212 
 213 static unsigned int fake_change = 0;
 214 static int initialising=1;
 215 
 216 #ifdef __sparc__
 217 /* We hold the FIFO configuration here.  We want to have Polling and
 218  * Implied Seek enabled on Sun controllers.
 219  */
 220 unsigned char fdc_cfg = 0;
 221 #endif
 222 
 223 static inline int TYPE(kdev_t x) {
     /* [previous][next][first][last][top][bottom][index][help] */
 224         return  (MINOR(x)>>2) & 0x1f;
 225 }
 226 static inline int DRIVE(kdev_t x) {
     /* [previous][next][first][last][top][bottom][index][help] */
 227         return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5);
 228 }
 229 #define ITYPE(x) (((x)>>2) & 0x1f)
 230 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5))
 231 #define UNIT(x) ((x) & 0x03)            /* drive on fdc */
 232 #define FDC(x) (((x) & 0x04) >> 2)  /* fdc of drive */
 233 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2))
 234                                 /* reverse mapping from unit and fdc to drive */
 235 #define DP (&drive_params[current_drive])
 236 #define DRS (&drive_state[current_drive])
 237 #define DRWE (&write_errors[current_drive])
 238 #define FDCS (&fdc_state[fdc])
 239 #define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags))
 240 #define SETF(x) (set_bit(x##_BIT, &DRS->flags))
 241 #define TESTF(x) (test_bit(x##_BIT, &DRS->flags))
 242 
 243 #define UDP (&drive_params[drive])
 244 #define UDRS (&drive_state[drive])
 245 #define UDRWE (&write_errors[drive])
 246 #define UFDCS (&fdc_state[FDC(drive)])
 247 #define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags))
 248 #define USETF(x) (set_bit(x##_BIT, &UDRS->flags))
 249 #define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags))
 250 
 251 #define DPRINT(x) printk(DEVICE_NAME "%d: " x,current_drive)
 252 
 253 #define DPRINT1(x,x1) printk(DEVICE_NAME "%d: " x,current_drive,(x1))
 254 
 255 #define DPRINT2(x,x1,x2) printk(DEVICE_NAME "%d: " x,current_drive,(x1),(x2))
 256 
 257 #define DPRINT3(x,x1,x2,x3) printk(DEVICE_NAME "%d: " x,current_drive,(x1),(x2),(x3))
 258 
 259 #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2)
 260 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH)
 261 
 262 #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x)))
 263 
 264 /* read/write */
 265 #define COMMAND raw_cmd->cmd[0]
 266 #define DR_SELECT raw_cmd->cmd[1]
 267 #define TRACK raw_cmd->cmd[2]
 268 #define HEAD raw_cmd->cmd[3]
 269 #define SECTOR raw_cmd->cmd[4]
 270 #define SIZECODE raw_cmd->cmd[5]
 271 #define SECT_PER_TRACK raw_cmd->cmd[6]
 272 #define GAP raw_cmd->cmd[7]
 273 #define SIZECODE2 raw_cmd->cmd[8]
 274 #define NR_RW 9
 275 
 276 /* format */
 277 #define F_SIZECODE raw_cmd->cmd[2]
 278 #define F_SECT_PER_TRACK raw_cmd->cmd[3]
 279 #define F_GAP raw_cmd->cmd[4]
 280 #define F_FILL raw_cmd->cmd[5]
 281 #define NR_F 6
 282 
 283 /*
 284  * Maximum disk size (in kilobytes). This default is used whenever the
 285  * current disk size is unknown.
 286  * [Now it is rather a minimum]
 287  */
 288 #define MAX_DISK_SIZE 2 /* 3984*/
 289 
 290 #define K_64    0x10000         /* 64KB */
 291 
 292 /*
 293  * globals used by 'result()'
 294  */
 295 #define MAX_REPLIES 16
 296 static unsigned char reply_buffer[MAX_REPLIES];
 297 static int inr; /* size of reply buffer, when called from interrupt */
 298 #define ST0 (reply_buffer[0])
 299 #define ST1 (reply_buffer[1])
 300 #define ST2 (reply_buffer[2])
 301 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */
 302 #define R_TRACK (reply_buffer[3])
 303 #define R_HEAD (reply_buffer[4])
 304 #define R_SECTOR (reply_buffer[5])
 305 #define R_SIZECODE (reply_buffer[6])
 306 
 307 #define SEL_DLY (2*HZ/100)
 308 
 309 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 310 /*
 311  * this struct defines the different floppy drive types.
 312  */
 313 static struct {
 314         struct floppy_drive_params params;
 315         const char *name; /* name printed while booting */
 316 } default_drive_params[]= {
 317 /* NOTE: the time values in jiffies should be in msec!
 318  CMOS drive type
 319   |     Maximum data rate supported by drive type
 320   |     |   Head load time, msec
 321   |     |   |   Head unload time, msec (not used)
 322   |     |   |   |     Step rate interval, usec
 323   |     |   |   |     |       Time needed for spinup time (jiffies)
 324   |     |   |   |     |       |      Timeout for spinning down (jiffies)
 325   |     |   |   |     |       |      |   Spindown offset (where disk stops)
 326   |     |   |   |     |       |      |   |     Select delay
 327   |     |   |   |     |       |      |   |     |     RPS
 328   |     |   |   |     |       |      |   |     |     |    Max number of tracks
 329   |     |   |   |     |       |      |   |     |     |    |     Interrupt timeout
 330   |     |   |   |     |       |      |   |     |     |    |     |   Max nonintlv. sectors
 331   |     |   |   |     |       |      |   |     |     |    |     |   | -Max Errors- flags */
 332 {{0,  500, 16, 16, 8000,    1*HZ, 3*HZ,  0, SEL_DLY, 5,  80, 3*HZ, 20, {3,1,2,0,2}, 0,
 333       0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" },
 334 
 335 {{1,  300, 16, 16, 8000,    1*HZ, 3*HZ,  0, SEL_DLY, 5,  40, 3*HZ, 17, {3,1,2,0,2}, 0,
 336       0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/
 337 
 338 {{2,  500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6,  83, 3*HZ, 17, {3,1,2,0,2}, 0,
 339       0, { 2, 5, 6,23,10,20,11, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/
 340 
 341 {{3,  250, 16, 16, 3000,    1*HZ, 3*HZ,  0, SEL_DLY, 5,  83, 3*HZ, 20, {3,1,2,0,2}, 0,
 342       0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/
 343 
 344 {{4,  500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5,  83, 3*HZ, 20, {3,1,2,0,2}, 0,
 345       0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/
 346 
 347 {{5, 1000, 15,  8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5,  83, 3*HZ, 40, {3,1,2,0,2}, 0,
 348       0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/
 349 
 350 {{6, 1000, 15,  8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5,  83, 3*HZ, 40, {3,1,2,0,2}, 0,
 351       0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/
 352 /*    |  --autodetected formats---    |      |      |
 353  *    read_track                      |      |    Name printed when booting
 354  *                                    |     Native format
 355  *                  Frequency of disk change checks */
 356 };
 357 
 358 static struct floppy_drive_params drive_params[N_DRIVE];
 359 static struct floppy_drive_struct drive_state[N_DRIVE];
 360 static struct floppy_write_errors write_errors[N_DRIVE];
 361 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd;
 362 
 363 /*
 364  * This struct defines the different floppy types.
 365  *
 366  * Bit 0 of 'stretch' tells if the tracks need to be doubled for some
 367  * types (e.g. 360kB diskette in 1.2MB drive, etc.).  Bit 1 of 'stretch'
 368  * tells if the disk is in Commodore 1581 format, which means side 0 sectors
 369  * are located on side 1 of the disk but with a side 0 ID, and vice-versa.
 370  * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the
 371  * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical
 372  * side 0 is on physical side 0 (but with the misnamed sector IDs).
 373  * 'stretch' should probably be renamed to something more general, like
 374  * 'options'.  Other parameters should be self-explanatory (see also
 375  * setfdprm(8)).
 376  */
 377 static struct floppy_struct floppy_type[32] = {
 378         {    0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL    }, /*  0 no testing    */
 379         {  720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360"  }, /*  1 360KB PC      */
 380         { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /*  2 1.2MB AT      */
 381         {  720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360"  }, /*  3 360KB SS 3.5" */
 382         { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720"  }, /*  4 720KB 3.5"    */
 383         {  720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360"  }, /*  5 360KB AT      */
 384         { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720"  }, /*  6 720KB AT      */
 385         { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /*  7 1.44MB 3.5"   */
 386         { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /*  8 2.88MB 3.5"   */
 387         { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"CompaQ"}, /*  9 2.88MB 3.5"   */
 388 
 389         { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25"  */
 390         { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5"   */
 391         {  820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410"  }, /* 12 410KB 5.25"   */
 392         { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820"  }, /* 13 820KB 3.5"    */
 393         { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25"  */
 394         { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5"   */
 395         {  840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420"  }, /* 16 420KB 5.25"   */
 396         { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830"  }, /* 17 830KB 3.5"    */
 397         { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25"  */
 398         { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5"  */
 399 
 400         { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880"  }, /* 20 880KB 5.25"   */
 401         { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5"   */
 402         { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5"   */
 403         { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25"   */
 404         { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5"   */
 405         { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5"   */
 406         { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5"   */
 407         { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5"   */
 408         { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5"   */
 409 
 410         { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5"   */
 411         { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800"  }, /* 30 800KB 3.5"    */
 412         { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5"    */
 413 };
 414 
 415 #define NUMBER(x)       (sizeof(x) / sizeof(*(x)))
 416 #define SECTSIZE (_FD_SECTSIZE(*floppy))
 417 
 418 /* Auto-detection: Disk type used until the next media change occurs. */
 419 static struct floppy_struct *current_type[N_DRIVE] = {
 420         NULL, NULL, NULL, NULL,
 421         NULL, NULL, NULL, NULL
 422 };
 423 
 424 /*
 425  * User-provided type information. current_type points to
 426  * the respective entry of this array.
 427  */
 428 static struct floppy_struct user_params[N_DRIVE];
 429 
 430 static int floppy_sizes[256];
 431 static int floppy_blocksizes[256] = { 0, };
 432 
 433 /*
 434  * The driver is trying to determine the correct media format
 435  * while probing is set. rw_interrupt() clears it after a
 436  * successful access.
 437  */
 438 static int probing = 0;
 439 
 440 /* Synchronization of FDC access. */
 441 #define FD_COMMAND_NONE -1
 442 #define FD_COMMAND_ERROR 2
 443 #define FD_COMMAND_OKAY 3
 444 
 445 static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0;
 446 static struct wait_queue *fdc_wait = NULL, *command_done = NULL;
 447 #define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible)
 448 #define CALL(x) if ((x) == -EINTR) return -EINTR
 449 #define ECALL(x) if ((ret = (x))) return ret;
 450 #define _WAIT(x,i) CALL(ret=wait_til_done((x),i))
 451 #define WAIT(x) _WAIT((x),interruptible)
 452 #define IWAIT(x) _WAIT((x),1)
 453 
 454 /* Errors during formatting are counted here. */
 455 static int format_errors;
 456 
 457 /* Format request descriptor. */
 458 static struct format_descr format_req;
 459 
 460 /*
 461  * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps
 462  * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc),
 463  * H is head unload time (1=16ms, 2=32ms, etc)
 464  */
 465 
 466 /*
 467  * Track buffer
 468  * Because these are written to by the DMA controller, they must
 469  * not contain a 64k byte boundary crossing, or data will be
 470  * corrupted/lost.
 471  */
 472 static char *floppy_track_buffer=0;
 473 static int max_buffer_sectors=0;
 474 
 475 static int *errors;
 476 typedef void (*done_f)(int);
 477 static struct cont_t {
 478         void (*interrupt)(void); /* this is called after the interrupt of the
 479                                   * main command */
 480         void (*redo)(void); /* this is called to retry the operation */
 481         void (*error)(void); /* this is called to tally an error */
 482         done_f done; /* this is called to say if the operation has 
 483                       * succeeded/failed */
 484 } *cont=NULL;
 485 
 486 static void floppy_ready(void);
 487 static void floppy_start(void);
 488 static void process_fd_request(void);
 489 static void recalibrate_floppy(void);
 490 static void floppy_shutdown(unsigned long);
 491 
 492 static int floppy_grab_irq_and_dma(void);
 493 static void floppy_release_irq_and_dma(void);
 494 
 495 /*
 496  * The "reset" variable should be tested whenever an interrupt is scheduled,
 497  * after the commands have been sent. This is to ensure that the driver doesn't
 498  * get wedged when the interrupt doesn't come because of a failed command.
 499  * reset doesn't need to be tested before sending commands, because
 500  * output_byte is automatically disabled when reset is set.
 501  */
 502 #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } }
 503 static void reset_fdc(void);
 504 
 505 /*
 506  * These are global variables, as that's the easiest way to give
 507  * information to interrupts. They are the data used for the current
 508  * request.
 509  */
 510 #define NO_TRACK -1
 511 #define NEED_1_RECAL -2
 512 #define NEED_2_RECAL -3
 513 
 514 /* */
 515 static int usage_count = 0;
 516 
 517 
 518 /* buffer related variables */
 519 static int buffer_track = -1;
 520 static int buffer_drive = -1;
 521 static int buffer_min = -1;
 522 static int buffer_max = -1;
 523 
 524 /* fdc related variables, should end up in a struct */
 525 static struct floppy_fdc_state fdc_state[N_FDC];
 526 static int fdc; /* current fdc */
 527 
 528 static struct floppy_struct *_floppy = floppy_type;
 529 static unsigned char current_drive = 0;
 530 static long current_count_sectors = 0;
 531 static unsigned char sector_t; /* sector in track */
 532 
 533 
 534 #ifndef fd_eject
 535 #ifdef __sparc__
 536 static int fd_eject(int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
 537 {
 538         set_dor(0, ~0, 0x90);
 539         udelay(500);
 540         set_dor(0, ~0x80, 0);
 541         udelay(500);
 542 }
 543 #else
 544 #define fd_eject(x) -EINVAL
 545 #endif
 546 #endif
 547 
 548 
 549 #ifdef DEBUGT
 550 static long unsigned debugtimer;
 551 #endif
 552 
 553 /*
 554  * Debugging
 555  * =========
 556  */
 557 static inline void set_debugt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 558 {
 559 #ifdef DEBUGT
 560         debugtimer = jiffies;
 561 #endif
 562 }
 563 
 564 static inline void debugt(const char *message)
     /* [previous][next][first][last][top][bottom][index][help] */
 565 {
 566 #ifdef DEBUGT
 567         if (DP->flags & DEBUGT)
 568                 printk("%s dtime=%lu\n", message, jiffies-debugtimer);
 569 #endif
 570 }
 571 
 572 typedef void (*timeout_fn)(unsigned long);
 573 static struct timer_list fd_timeout ={ NULL, NULL, 0, 0,
 574                                        (timeout_fn) floppy_shutdown };
 575 
 576 static const char *timeout_message;
 577 
 578 #ifdef FLOPPY_SANITY_CHECK
 579 static void is_alive(const char *message)
     /* [previous][next][first][last][top][bottom][index][help] */
 580 {
 581         /* this routine checks whether the floppy driver is "alive" */
 582         if (fdc_busy && command_status < 2 && !fd_timeout.prev){
 583                 DPRINT1("timeout handler died: %s\n",message);
 584         }
 585 }
 586 #endif
 587 
 588 #ifdef FLOPPY_SANITY_CHECK
 589 
 590 #define OLOGSIZE 20
 591 
 592 static void (*lasthandler)(void) = NULL;
 593 static int interruptjiffies=0;
 594 static int resultjiffies=0;
 595 static int resultsize=0;
 596 static int lastredo=0;
 597 
 598 static struct output_log {
 599         unsigned char data;
 600         unsigned char status;
 601         unsigned long jiffies;
 602 } output_log[OLOGSIZE];
 603 
 604 static int output_log_pos=0;
 605 #endif
 606 
 607 #define CURRENTD -1
 608 #define MAXTIMEOUT -2
 609 
 610 static void reschedule_timeout(int drive, const char *message, int marg)
     /* [previous][next][first][last][top][bottom][index][help] */
 611 {
 612         if (drive == CURRENTD)
 613                 drive = current_drive;
 614         del_timer(&fd_timeout);
 615         if (drive < 0 || drive > N_DRIVE) {
 616                 fd_timeout.expires = jiffies + 20*HZ;
 617                 drive=0;
 618         } else
 619                 fd_timeout.expires = jiffies + UDP->timeout;
 620         add_timer(&fd_timeout);
 621         if (UDP->flags & FD_DEBUG){
 622                 DPRINT("reschedule timeout ");
 623                 printk(message, marg);
 624                 printk("\n");
 625         }
 626         timeout_message = message;
 627 }
 628 
 629 static int maximum(int a, int b)
     /* [previous][next][first][last][top][bottom][index][help] */
 630 {
 631         if(a > b)
 632                 return a;
 633         else
 634                 return b;
 635 }
 636 #define INFBOUND(a,b) (a)=maximum((a),(b));
 637 
 638 static int minimum(int a, int b)
     /* [previous][next][first][last][top][bottom][index][help] */
 639 {
 640         if(a < b)
 641                 return a;
 642         else
 643                 return b;
 644 }
 645 #define SUPBOUND(a,b) (a)=minimum((a),(b));
 646 
 647 
 648 /*
 649  * Bottom half floppy driver.
 650  * ==========================
 651  *
 652  * This part of the file contains the code talking directly to the hardware,
 653  * and also the main service loop (seek-configure-spinup-command)
 654  */
 655 
 656 /*
 657  * disk change.
 658  * This routine is responsible for maintaining the FD_DISK_CHANGE flag,
 659  * and the last_checked date.
 660  *
 661  * last_checked is the date of the last check which showed 'no disk change'
 662  * FD_DISK_CHANGE is set under two conditions:
 663  * 1. The floppy has been changed after some i/o to that floppy already
 664  *    took place.
 665  * 2. No floppy disk is in the drive. This is done in order to ensure that
 666  *    requests are quickly flushed in case there is no disk in the drive. It
 667  *    follows that FD_DISK_CHANGE can only be cleared if there is a disk in
 668  *    the drive.
 669  *
 670  * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet.
 671  * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on
 672  *  each seek. If a disk is present, the disk change line should also be
 673  *  cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk
 674  *  change line is set, this means either that no disk is in the drive, or
 675  *  that it has been removed since the last seek.
 676  *
 677  * This means that we really have a third possibility too:
 678  *  The floppy has been changed after the last seek.
 679  */
 680 
 681 static int disk_change(int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
 682 {
 683         int fdc=FDC(drive);
 684 #ifdef FLOPPY_SANITY_CHECK
 685         if (jiffies < UDP->select_delay + UDRS->select_date)
 686                 DPRINT("WARNING disk change called early\n");
 687         if (!(FDCS->dor & (0x10 << UNIT(drive))) ||
 688            (FDCS->dor & 3) != UNIT(drive) ||
 689            fdc != FDC(drive)){
 690                 DPRINT("probing disk change on unselected drive\n");
 691                 DPRINT3("drive=%d fdc=%d dor=%x\n",drive, FDC(drive),
 692                         FDCS->dor);
 693         }
 694 #endif
 695 
 696 #ifdef DCL_DEBUG
 697         if (UDP->flags & FD_DEBUG){
 698                 DPRINT1("checking disk change line for drive %d\n",drive);
 699                 DPRINT1("jiffies=%ld\n", jiffies);
 700                 DPRINT1("disk change line=%x\n",fd_inb(FD_DIR)&0x80);
 701                 DPRINT1("flags=%x\n",UDRS->flags);
 702         }
 703 #endif
 704         if (UDP->flags & FD_BROKEN_DCL)
 705                 return UTESTF(FD_DISK_CHANGED);
 706         if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){
 707                 USETF(FD_VERIFY); /* verify write protection */
 708                 if (UDRS->maxblock){
 709                         /* mark it changed */
 710                         USETF(FD_DISK_CHANGED);
 711 
 712                         /* invalidate its geometry */
 713                         if (UDRS->keep_data >= 0) {
 714                                 if ((UDP->flags & FTD_MSG) &&
 715                                     current_type[drive] != NULL)
 716                                         DPRINT("Disk type is undefined after "
 717                                                "disk change\n");
 718                                 current_type[drive] = NULL;
 719                                 floppy_sizes[TOMINOR(current_drive)] = MAX_DISK_SIZE;
 720                         }
 721                 }
 722                 /*USETF(FD_DISK_NEWCHANGE);*/
 723                 return 1;
 724         } else {
 725                 UDRS->last_checked=jiffies;
 726                 UCLEARF(FD_DISK_NEWCHANGE);
 727         }
 728         return 0;
 729 }
 730 
 731 static inline int is_selected(int dor, int unit)
     /* [previous][next][first][last][top][bottom][index][help] */
 732 {
 733         return ((dor  & (0x10 << unit)) && (dor &3) == unit);
 734 }
 735 
 736 static int set_dor(int fdc, char mask, char data)
     /* [previous][next][first][last][top][bottom][index][help] */
 737 {
 738         register unsigned char drive, unit, newdor,olddor;
 739 
 740         if (FDCS->address == -1)
 741                 return -1;
 742 
 743         olddor = FDCS->dor;
 744         newdor =  (olddor & mask) | data;
 745         if (newdor != olddor){
 746                 unit = olddor & 0x3;
 747                 if (is_selected(olddor, unit) && !is_selected(newdor,unit)){
 748                         drive = REVDRIVE(fdc,unit);
 749 #ifdef DCL_DEBUG
 750                         if (UDP->flags & FD_DEBUG){
 751                                 DPRINT("calling disk change from set_dor\n");
 752                         }
 753 #endif
 754                         disk_change(drive);
 755                 }
 756                 FDCS->dor = newdor;
 757                 fd_outb(newdor, FD_DOR);
 758 
 759                 unit = newdor & 0x3;
 760                 if (!is_selected(olddor, unit) && is_selected(newdor,unit)){
 761                         drive = REVDRIVE(fdc,unit);
 762                         UDRS->select_date = jiffies;
 763                 }
 764         }
 765         if (newdor & FLOPPY_MOTOR_MASK)
 766                 floppy_grab_irq_and_dma();
 767         if (olddor & FLOPPY_MOTOR_MASK)
 768                 floppy_release_irq_and_dma();
 769         return olddor;
 770 }
 771 
 772 static void twaddle(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 773 {
 774         if (DP->select_delay)
 775                 return;
 776         fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR);
 777         fd_outb(FDCS->dor, FD_DOR);
 778         DRS->select_date = jiffies;
 779 }
 780 
 781 /* reset all driver information about the current fdc. This is needed after
 782  * a reset, and after a raw command. */
 783 static void reset_fdc_info(int mode)
     /* [previous][next][first][last][top][bottom][index][help] */
 784 {
 785         int drive;
 786 
 787         FDCS->spec1 = FDCS->spec2 = -1;
 788         FDCS->need_configure = 1;
 789         FDCS->perp_mode = 1;
 790         FDCS->rawcmd = 0;
 791         for (drive = 0; drive < N_DRIVE; drive++)
 792                 if (FDC(drive) == fdc &&
 793                     (mode || UDRS->track != NEED_1_RECAL))
 794                         UDRS->track = NEED_2_RECAL;
 795 }
 796 
 797 /* selects the fdc and drive, and enables the fdc's input/dma. */
 798 static void set_fdc(int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
 799 {
 800         if (drive >= 0 && drive < N_DRIVE){
 801                 fdc = FDC(drive);
 802                 current_drive = drive;
 803         }
 804         if (fdc != 1 && fdc != 0) {
 805                 printk("bad fdc value\n");
 806                 return;
 807         }
 808         set_dor(fdc,~0,8);
 809 #if N_FDC > 1
 810         set_dor(1-fdc, ~8, 0);
 811 #endif
 812         if (FDCS->rawcmd == 2)
 813                 reset_fdc_info(1);
 814         if (fd_inb(FD_STATUS) != STATUS_READY)
 815                 FDCS->reset = 1;
 816 }
 817 
 818 /* locks the driver */
 819 static int lock_fdc(int drive, int interruptible)
     /* [previous][next][first][last][top][bottom][index][help] */
 820 {
 821         if (!usage_count){
 822                 printk("trying to lock fdc while usage count=0\n");
 823                 return -1;
 824         }
 825         floppy_grab_irq_and_dma();
 826         cli();
 827         while (fdc_busy && NO_SIGNAL)
 828                 interruptible_sleep_on(&fdc_wait);
 829         if (fdc_busy){
 830                 sti();
 831                 return -EINTR;
 832         }
 833         fdc_busy = 1;
 834         sti();
 835         command_status = FD_COMMAND_NONE;
 836         reschedule_timeout(drive, "lock fdc", 0);
 837         set_fdc(drive);
 838         return 0;
 839 }
 840 
 841 #define LOCK_FDC(drive,interruptible) \
 842 if (lock_fdc(drive,interruptible)) return -EINTR;
 843 
 844 
 845 /* unlocks the driver */
 846 static inline void unlock_fdc(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 847 {
 848         raw_cmd = 0;
 849         if (!fdc_busy)
 850                 DPRINT("FDC access conflict!\n");
 851 
 852         if (DEVICE_INTR)
 853                 DPRINT1("device interrupt still active at FDC release: %p!\n",
 854                         DEVICE_INTR);
 855         command_status = FD_COMMAND_NONE;
 856         del_timer(&fd_timeout);
 857         cont = NULL;
 858         fdc_busy = 0;
 859         floppy_release_irq_and_dma();
 860         wake_up(&fdc_wait);
 861 }
 862 
 863 /* switches the motor off after a given timeout */
 864 static void motor_off_callback(unsigned long nr)
     /* [previous][next][first][last][top][bottom][index][help] */
 865 {
 866         unsigned char mask = ~(0x10 << UNIT(nr));
 867 
 868         set_dor(FDC(nr), mask, 0);
 869 }
 870 
 871 static struct timer_list motor_off_timer[N_DRIVE] = {
 872         { NULL, NULL, 0, 0, motor_off_callback },
 873         { NULL, NULL, 0, 1, motor_off_callback },
 874         { NULL, NULL, 0, 2, motor_off_callback },
 875         { NULL, NULL, 0, 3, motor_off_callback },
 876         { NULL, NULL, 0, 4, motor_off_callback },
 877         { NULL, NULL, 0, 5, motor_off_callback },
 878         { NULL, NULL, 0, 6, motor_off_callback },
 879         { NULL, NULL, 0, 7, motor_off_callback }
 880 };
 881 
 882 /* schedules motor off */
 883 static void floppy_off(unsigned int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
 884 {
 885         unsigned long volatile delta;
 886         register int fdc=FDC(drive);
 887 
 888         if (!(FDCS->dor & (0x10 << UNIT(drive))))
 889                 return;
 890 
 891         del_timer(motor_off_timer+drive);
 892 
 893         /* make spindle stop in a position which minimizes spinup time
 894          * next time */
 895         if (UDP->rps){
 896                 delta = jiffies - UDRS->first_read_date + HZ -
 897                         UDP->spindown_offset;
 898                 delta = ((delta * UDP->rps) % HZ) / UDP->rps;
 899                 motor_off_timer[drive].expires = jiffies + UDP->spindown - delta;
 900         }
 901         add_timer(motor_off_timer+drive);
 902 }
 903 
 904 /*
 905  * cycle through all N_DRIVE floppy drives, for disk change testing.
 906  * stopping at current drive. This is done before any long operation, to
 907  * be sure to have up to date disk change information.
 908  */
 909 static void scandrives(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 910 {
 911         int i, drive, saved_drive;
 912 
 913         if (DP->select_delay)
 914                 return;
 915 
 916         saved_drive = current_drive;
 917         for (i=0; i < N_DRIVE; i++){
 918                 drive = (saved_drive + i + 1) % N_DRIVE;
 919                 if (UDRS->fd_ref == 0 || UDP->select_delay != 0)
 920                         continue; /* skip closed drives */
 921                 set_fdc(drive);
 922                 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) &
 923                       (0x10 << UNIT(drive))))
 924                         /* switch the motor off again, if it was off to
 925                          * begin with */
 926                         set_dor(fdc, ~(0x10 << UNIT(drive)), 0);
 927         }
 928         set_fdc(saved_drive);
 929 }
 930 
 931 static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 };
 932 
 933 /* this function makes sure that the disk stays in the drive during the
 934  * transfer */
 935 static void fd_watchdog(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 936 {
 937 #ifdef DCL_DEBUG
 938         if (DP->flags & FD_DEBUG){
 939                 DPRINT("calling disk change from watchdog\n");
 940         }
 941 #endif
 942 
 943         if (disk_change(current_drive)){
 944                 DPRINT("disk removed during i/o\n");
 945                 floppy_shutdown(1);
 946         } else {
 947                 del_timer(&fd_timer);
 948                 fd_timer.function = (timeout_fn) fd_watchdog;
 949                 fd_timer.expires = jiffies + HZ / 10;
 950                 add_timer(&fd_timer);
 951         }
 952 }
 953 
 954 static void main_command_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 955 {
 956         del_timer(&fd_timer);
 957         cont->interrupt();
 958 }
 959 
 960 /* waits for a delay (spinup or select) to pass */
 961 static int wait_for_completion(int delay, timeout_fn function)
     /* [previous][next][first][last][top][bottom][index][help] */
 962 {
 963         if (FDCS->reset){
 964                 reset_fdc(); /* do the reset during sleep to win time
 965                               * if we don't need to sleep, it's a good
 966                               * occasion anyways */
 967                 return 1;
 968         }
 969 
 970         if (jiffies < delay){
 971                 del_timer(&fd_timer);
 972                 fd_timer.function = function;
 973                 fd_timer.expires = delay;
 974                 add_timer(&fd_timer);
 975                 return 1;
 976         }
 977         return 0;
 978 }
 979 
 980 static int hlt_disabled=0;
 981 static void floppy_disable_hlt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 982 {
 983         unsigned long flags;
 984         save_flags(flags);
 985         cli();
 986         if (!hlt_disabled){
 987                 hlt_disabled=1;
 988 #ifdef HAVE_DISABLE_HLT
 989                 disable_hlt();
 990 #endif
 991         }
 992         restore_flags(flags);
 993 }
 994 
 995 static void floppy_enable_hlt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
 996 {
 997         unsigned long flags;
 998         save_flags(flags);
 999         cli();
1000         if (hlt_disabled){
1001                 hlt_disabled=0;
1002 #ifdef HAVE_DISABLE_HLT
1003                 enable_hlt();
1004 #endif
1005         }
1006         restore_flags(flags);
1007 }
1008 
1009 
1010 static void setup_DMA(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1011 {
1012 #ifdef FLOPPY_SANITY_CHECK
1013         if (raw_cmd->length == 0){
1014                 int i;
1015 
1016                 printk("zero dma transfer size:");
1017                 for (i=0; i < raw_cmd->cmd_count; i++)
1018                         printk("%x,", raw_cmd->cmd[i]);
1019                 printk("\n");
1020                 cont->done(0);
1021                 FDCS->reset = 1;
1022                 return;
1023         }
1024         if ((long) raw_cmd->kernel_data % 512){
1025                 printk("non aligned address: %p\n", raw_cmd->kernel_data);
1026                 cont->done(0);
1027                 FDCS->reset=1;
1028                 return;
1029         }
1030         if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) {
1031                 printk("DMA crossing 64-K boundary %p-%p\n",
1032                        raw_cmd->kernel_data,
1033                        raw_cmd->kernel_data + raw_cmd->length);
1034                 cont->done(0);
1035                 FDCS->reset=1;
1036                 return;
1037         }
1038 #endif
1039         cli();
1040         fd_disable_dma();
1041         fd_clear_dma_ff();
1042         fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)?
1043                         DMA_MODE_READ : DMA_MODE_WRITE);
1044         fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data));
1045         fd_set_dma_count(raw_cmd->length);
1046         virtual_dma_port = FDCS->address;
1047         fd_enable_dma();
1048         sti();
1049         floppy_disable_hlt();
1050 }
1051 
1052 void show_floppy(void);
1053 
1054 /* waits until the fdc becomes ready */
1055 static int wait_til_ready(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1056 {
1057         int counter, status;
1058         if(FDCS->reset)
1059                 return -1;
1060         for (counter = 0; counter < 10000; counter++) {
1061                 status = fd_inb(FD_STATUS);             
1062                 if (status & STATUS_READY)
1063                         return status;
1064         }
1065         if (!initialising) {
1066                 DPRINT2("Getstatus times out (%x) on fdc %d\n",
1067                         status, fdc);
1068                 show_floppy();
1069         }
1070         FDCS->reset = 1;
1071         return -1;
1072 }
1073 
1074 /* sends a command byte to the fdc */
1075 static int output_byte(char byte)
     /* [previous][next][first][last][top][bottom][index][help] */
1076 {
1077         int status;
1078 
1079         if ((status = wait_til_ready()) < 0)
1080                 return -1;
1081         if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){
1082                 fd_outb(byte,FD_DATA);
1083 #ifdef FLOPPY_SANITY_CHECK
1084                 output_log[output_log_pos].data = byte;
1085                 output_log[output_log_pos].status = status;
1086                 output_log[output_log_pos].jiffies = jiffies;
1087                 output_log_pos = (output_log_pos + 1) % OLOGSIZE;
1088 #endif
1089                 return 0;
1090         }
1091         FDCS->reset = 1;
1092         if (!initialising) {
1093                 DPRINT2("Unable to send byte %x to FDC. Status=%x\n",
1094                         byte, status);
1095                 show_floppy();
1096         }
1097         return -1;
1098 }
1099 #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;}
1100 
1101 /* gets the response from the fdc */
1102 static int result(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1103 {
1104         int i, status;
1105 
1106         for(i=0; i < MAX_REPLIES; i++) {
1107                 if ((status = wait_til_ready()) < 0)
1108                         break;
1109                 status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA;
1110                 if ((status & ~STATUS_BUSY) == STATUS_READY){
1111 #ifdef FLOPPY_SANITY_CHECK
1112                         resultjiffies = jiffies;
1113                         resultsize = i;
1114 #endif
1115                         return i;
1116                 }
1117                 if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY))
1118                         reply_buffer[i] = fd_inb(FD_DATA);
1119                 else
1120                         break;
1121         }
1122         if(!initialising) {
1123                 DPRINT2("'get result' error. Last status=%x Read bytes=%d\n",
1124                         status, i);
1125                 show_floppy();
1126         }
1127         FDCS->reset = 1;
1128         return -1;
1129 }
1130 
1131 #define MORE_OUTPUT -2
1132 /* does the fdc need more output? */
1133 static int need_more_output(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1134 {
1135         int status;
1136         if( (status = wait_til_ready()) < 0)
1137                 return -1;
1138         if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY)
1139                 return MORE_OUTPUT;
1140         return result();
1141 }
1142 
1143 /* Set perpendicular mode as required, based on data rate, if supported.
1144  * 82077 Now tested. 1Mbps data rate only possible with 82077-1.
1145  */
1146 static inline void perpendicular_mode(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1147 {
1148         unsigned char perp_mode;
1149 
1150         if (raw_cmd->rate & 0x40){
1151                 switch(raw_cmd->rate & 3){
1152                         case 0:
1153                                 perp_mode=2;
1154                                 break;
1155                         case 3:
1156                                 perp_mode=3;
1157                                 break;
1158                         default:
1159                                 DPRINT("Invalid data rate for perpendicular mode!\n");
1160                                 cont->done(0);
1161                                 FDCS->reset = 1; /* convenient way to return to
1162                                                   * redo without to much hassle (deep
1163                                                   * stack et al. */
1164                                 return;
1165                 }
1166         } else
1167                 perp_mode = 0;
1168 
1169         if (FDCS->perp_mode == perp_mode)
1170                 return;
1171         if (FDCS->version >= FDC_82077_ORIG) {
1172                 output_byte(FD_PERPENDICULAR);
1173                 output_byte(perp_mode);
1174                 FDCS->perp_mode = perp_mode;
1175         } else if (perp_mode) {
1176                 DPRINT("perpendicular mode not supported by this FDC.\n");
1177         }
1178 } /* perpendicular_mode */
1179 
1180 static int fifo_depth = 0xa;
1181 static int no_fifo = 0;
1182 
1183 static int fdc_configure(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1184 {
1185         /* Turn on FIFO */
1186         output_byte(FD_CONFIGURE);
1187 #ifdef __sparc__ 
1188         output_byte(0x64);      /* Motor off timeout */
1189         output_byte(fdc_cfg | 0x0A);
1190 #else
1191         if(need_more_output() != MORE_OUTPUT)
1192                 return 0;
1193         output_byte(0);
1194         output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf));
1195 #endif
1196         output_byte(0); /* pre-compensation from track 
1197                            0 upwards */
1198         return 1;
1199 }       
1200 
1201 #define NOMINAL_DTR 500
1202 
1203 /* Issue a "SPECIFY" command to set the step rate time, head unload time,
1204  * head load time, and DMA disable flag to values needed by floppy.
1205  *
1206  * The value "dtr" is the data transfer rate in Kbps.  It is needed
1207  * to account for the data rate-based scaling done by the 82072 and 82077
1208  * FDC types.  This parameter is ignored for other types of FDCs (i.e.
1209  * 8272a).
1210  *
1211  * Note that changing the data transfer rate has a (probably deleterious)
1212  * effect on the parameters subject to scaling for 82072/82077 FDCs, so
1213  * fdc_specify is called again after each data transfer rate
1214  * change.
1215  *
1216  * srt: 1000 to 16000 in microseconds
1217  * hut: 16 to 240 milliseconds
1218  * hlt: 2 to 254 milliseconds
1219  *
1220  * These values are rounded up to the next highest available delay time.
1221  */
1222 static void fdc_specify(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1223 {
1224         unsigned char spec1, spec2;
1225         int srt, hlt, hut;
1226         unsigned long dtr = NOMINAL_DTR;
1227         unsigned long scale_dtr = NOMINAL_DTR;
1228         int hlt_max_code = 0x7f;
1229         int hut_max_code = 0xf;
1230 
1231         if (FDCS->need_configure && FDCS->version >= FDC_82072A) {
1232                 fdc_configure();
1233                 FDCS->need_configure = 0;
1234                 /*DPRINT("FIFO enabled\n");*/
1235         }
1236 
1237 #ifdef __sparc__
1238         /* If doing implied seeks, no specify necessary */
1239         if(fdc_cfg&0x40)
1240                 return;
1241 #endif
1242 
1243         switch (raw_cmd->rate & 0x03) {
1244                 case 3:
1245                         dtr = 1000;
1246                         break;
1247                 case 1:
1248                         dtr = 300;
1249                         if (FDCS->version >= FDC_82078) {
1250                                 /* chose the default rate table, not the one
1251                                  * where 1 = 2 Mbps */
1252                                 output_byte(FD_DRIVESPEC);
1253                                 if(need_more_output() == MORE_OUTPUT) {
1254                                         output_byte(UNIT(current_drive));
1255                                         output_byte(0xc0);
1256                                 }
1257                         }
1258                         break;
1259                 case 2:
1260                         dtr = 250;
1261                         break;
1262         }
1263 
1264         if (FDCS->version >= FDC_82072) {
1265                 scale_dtr = dtr;
1266                 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */
1267                 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */
1268         }
1269 
1270         /* Convert step rate from microseconds to milliseconds and 4 bits */
1271         srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR;
1272         SUPBOUND(srt, 0xf);
1273         INFBOUND(srt, 0);
1274 
1275         hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR;
1276         if (hlt < 0x01)
1277                 hlt = 0x01;
1278         else if (hlt > 0x7f)
1279                 hlt = hlt_max_code;
1280 
1281         hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR;
1282         if (hut < 0x1)
1283                 hut = 0x1;
1284         else if (hut > 0xf)
1285                 hut = hut_max_code;
1286 
1287         spec1 = (srt << 4) | hut;
1288         spec2 = (hlt << 1) | (use_virtual_dma & 1);
1289 
1290         /* If these parameters did not change, just return with success */
1291         if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) {
1292                 /* Go ahead and set spec1 and spec2 */
1293                 output_byte(FD_SPECIFY);
1294                 output_byte(FDCS->spec1 = spec1);
1295                 output_byte(FDCS->spec2 = spec2);
1296         }
1297 } /* fdc_specify */
1298 
1299 /* Set the FDC's data transfer rate on behalf of the specified drive.
1300  * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue
1301  * of the specify command (i.e. using the fdc_specify function).
1302  */
1303 static int fdc_dtr(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1304 {
1305         /* If data rate not already set to desired value, set it. */
1306         if ((raw_cmd->rate & 3) == FDCS->dtr)
1307                 return 0;
1308 
1309         /* Set dtr */
1310         fd_outb(raw_cmd->rate & 3, FD_DCR);
1311 
1312         /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB)
1313          * need a stabilization period of several milliseconds to be
1314          * enforced after data rate changes before R/W operations.
1315          * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies)
1316          */
1317         FDCS->dtr = raw_cmd->rate & 3;
1318         return(wait_for_completion(jiffies+2*HZ/100,
1319                                    (timeout_fn) floppy_ready));
1320 } /* fdc_dtr */
1321 
1322 static void tell_sector(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1323 {
1324         printk(": track %d, head %d, sector %d, size %d",
1325                R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE);
1326 } /* tell_sector */
1327 
1328 
1329 /*
1330  * OK, this error interpreting routine is called after a
1331  * DMA read/write has succeeded
1332  * or failed, so we check the results, and copy any buffers.
1333  * hhb: Added better error reporting.
1334  * ak: Made this into a separate routine.
1335  */
1336 static int interpret_errors(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1337 {
1338         char bad;
1339 
1340         if (inr!=7) {
1341                 DPRINT("-- FDC reply error");
1342                 FDCS->reset = 1;
1343                 return 1;
1344         }
1345 
1346         /* check IC to find cause of interrupt */
1347         switch (ST0 & ST0_INTR) {
1348                 case 0x40:      /* error occurred during command execution */
1349                         if (ST1 & ST1_EOC)
1350                                 return 0; /* occurs with pseudo-DMA */
1351                         bad = 1;
1352                         if (ST1 & ST1_WP) {
1353                                 DPRINT("Drive is write protected\n");
1354                                 CLEARF(FD_DISK_WRITABLE);
1355                                 cont->done(0);
1356                                 bad = 2;
1357                         } else if (ST1 & ST1_ND) {
1358                                 SETF(FD_NEED_TWADDLE);
1359                         } else if (ST1 & ST1_OR) {
1360                                 if (DP->flags & FTD_MSG)
1361                                         DPRINT("Over/Underrun - retrying\n");
1362                                 bad = 0;
1363                         }else if (*errors >= DP->max_errors.reporting){
1364                                 DPRINT("");
1365                                 if (ST0 & ST0_ECE) {
1366                                         printk("Recalibrate failed!");
1367                                 } else if (ST2 & ST2_CRC) {
1368                                         printk("data CRC error");
1369                                         tell_sector();
1370                                 } else if (ST1 & ST1_CRC) {
1371                                         printk("CRC error");
1372                                         tell_sector();
1373                                 } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) {
1374                                         if (!probing) {
1375                                                 printk("sector not found");
1376                                                 tell_sector();
1377                                         } else
1378                                                 printk("probe failed...");
1379                                 } else if (ST2 & ST2_WC) {      /* seek error */
1380                                         printk("wrong cylinder");
1381                                 } else if (ST2 & ST2_BC) {      /* cylinder marked as bad */
1382                                         printk("bad cylinder");
1383                                 } else {
1384                                         printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2);
1385                                         tell_sector();
1386                                 }
1387                                 printk("\n");
1388 
1389                         }
1390                         if (ST2 & ST2_WC || ST2 & ST2_BC)
1391                                 /* wrong cylinder => recal */
1392                                 DRS->track = NEED_2_RECAL;
1393                         return bad;
1394                 case 0x80: /* invalid command given */
1395                         DPRINT("Invalid FDC command given!\n");
1396                         cont->done(0);
1397                         return 2;
1398                 case 0xc0:
1399                         DPRINT("Abnormal termination caused by polling\n");
1400                         cont->error();
1401                         return 2;
1402                 default: /* (0) Normal command termination */
1403                         return 0;
1404         }
1405 }
1406 
1407 /*
1408  * This routine is called when everything should be correctly set up
1409  * for the transfer (i.e. floppy motor is on, the correct floppy is
1410  * selected, and the head is sitting on the right track).
1411  */
1412 static void setup_rw_floppy(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1413 {
1414         int i,ready_date,r, flags,dflags;
1415         timeout_fn function;
1416 
1417         flags = raw_cmd->flags;
1418         if (flags & (FD_RAW_READ | FD_RAW_WRITE))
1419                 flags |= FD_RAW_INTR;
1420 
1421         if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){
1422                 ready_date = DRS->spinup_date + DP->spinup;
1423                 /* If spinup will take a long time, rerun scandrives
1424                  * again just before spinup completion. Beware that
1425                  * after scandrives, we must again wait for selection.
1426                  */
1427                 if (ready_date > jiffies + DP->select_delay){
1428                         ready_date -= DP->select_delay;
1429                         function = (timeout_fn) floppy_start;
1430                 } else
1431                         function = (timeout_fn) setup_rw_floppy;
1432 
1433                 /* wait until the floppy is spinning fast enough */
1434                 if (wait_for_completion(ready_date,function))
1435                         return;
1436         }
1437         dflags = DRS->flags;
1438 
1439         if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE))
1440                 setup_DMA();
1441 
1442         if (flags & FD_RAW_INTR)
1443                 SET_INTR(main_command_interrupt);
1444 
1445         r=0;
1446         for (i=0; i< raw_cmd->cmd_count; i++)
1447                 r|=output_byte(raw_cmd->cmd[i]);
1448 
1449 #ifdef DEBUGT
1450         debugt("rw_command: ");
1451 #endif
1452         if (r){
1453                 cont->error();
1454                 reset_fdc();
1455                 return;
1456         }
1457 
1458         if (!(flags & FD_RAW_INTR)){
1459                 inr = result();
1460                 cont->interrupt();
1461         } else if (flags & FD_RAW_NEED_DISK)
1462                 fd_watchdog();
1463 }
1464 
1465 static int blind_seek;
1466 
1467 /*
1468  * This is the routine called after every seek (or recalibrate) interrupt
1469  * from the floppy controller.
1470  */
1471 static void seek_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1472 {
1473 #ifdef DEBUGT
1474         debugt("seek interrupt:");
1475 #endif
1476         if (inr != 2 || (ST0 & 0xF8) != 0x20) {
1477                 DPRINT("seek failed\n");
1478                 DRS->track = NEED_2_RECAL;
1479                 cont->error();
1480                 cont->redo();
1481                 return;
1482         }
1483         if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){
1484 #ifdef DCL_DEBUG
1485                 if (DP->flags & FD_DEBUG){
1486                         DPRINT("clearing NEWCHANGE flag because of effective seek\n");
1487                         DPRINT1("jiffies=%ld\n", jiffies);
1488                 }
1489 #endif
1490                 CLEARF(FD_DISK_NEWCHANGE); /* effective seek */
1491                 DRS->select_date = jiffies;
1492         }
1493         DRS->track = ST1;
1494         floppy_ready();
1495 }
1496 
1497 static void check_wp(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1498 {
1499         if (TESTF(FD_VERIFY)) {
1500                 /* check write protection */
1501                 output_byte(FD_GETSTATUS);
1502                 output_byte(UNIT(current_drive));
1503                 if (result() != 1){
1504                         FDCS->reset = 1;
1505                         return;
1506                 }
1507                 CLEARF(FD_VERIFY);
1508                 CLEARF(FD_NEED_TWADDLE);
1509 #ifdef DCL_DEBUG
1510                 if (DP->flags & FD_DEBUG){
1511                         DPRINT("checking whether disk is write protected\n");
1512                         DPRINT1("wp=%x\n",ST3 & 0x40);
1513                 }
1514 #endif
1515                 if (!(ST3  & 0x40))
1516                         SETF(FD_DISK_WRITABLE);
1517                 else
1518                         CLEARF(FD_DISK_WRITABLE);
1519         }
1520 }
1521 
1522 static void seek_floppy(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1523 {
1524         int track;
1525 
1526         blind_seek=0;
1527 
1528 #ifdef DCL_DEBUG
1529         if (DP->flags & FD_DEBUG){
1530                 DPRINT("calling disk change from seek\n");
1531         }
1532 #endif
1533 
1534         if (!TESTF(FD_DISK_NEWCHANGE) &&
1535             disk_change(current_drive) &&
1536             (raw_cmd->flags & FD_RAW_NEED_DISK)){
1537                 /* the media changed flag should be cleared after the seek.
1538                  * If it isn't, this means that there is really no disk in
1539                  * the drive.
1540                  */
1541                 SETF(FD_DISK_CHANGED);
1542                 cont->done(0);
1543                 cont->redo();
1544                 return;
1545         }
1546         if (DRS->track <= NEED_1_RECAL){
1547                 recalibrate_floppy();
1548                 return;
1549         } else if (TESTF(FD_DISK_NEWCHANGE) &&
1550                    (raw_cmd->flags & FD_RAW_NEED_DISK) &&
1551                    (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) {
1552                 /* we seek to clear the media-changed condition. Does anybody
1553                  * know a more elegant way, which works on all drives? */
1554                 if (raw_cmd->track)
1555                         track = raw_cmd->track - 1;
1556                 else {
1557                         if (DP->flags & FD_SILENT_DCL_CLEAR){
1558                                 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0);
1559                                 blind_seek = 1;
1560                                 raw_cmd->flags |= FD_RAW_NEED_SEEK;
1561                         }
1562                         track = 1;
1563                 }
1564         } else {
1565                 check_wp();
1566                 if (raw_cmd->track != DRS->track &&
1567                     (raw_cmd->flags & FD_RAW_NEED_SEEK))
1568                         track = raw_cmd->track;
1569                 else {
1570                         setup_rw_floppy();
1571                         return;
1572                 }
1573         }
1574 
1575 #ifdef __sparc__
1576         if (fdc_cfg&0x40) {
1577                 /* Implied seeks being done... */
1578                 DRS->track = raw_cmd->track;
1579                 setup_rw_floppy();
1580                 return;
1581         }
1582 #endif
1583 
1584         SET_INTR(seek_interrupt);
1585         output_byte(FD_SEEK);
1586         output_byte(UNIT(current_drive));
1587         LAST_OUT(track);
1588 #ifdef DEBUGT
1589         debugt("seek command:");
1590 #endif
1591 }
1592 
1593 static void recal_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1594 {
1595 #ifdef DEBUGT
1596         debugt("recal interrupt:");
1597 #endif
1598         if (inr !=2)
1599                 FDCS->reset = 1;
1600         else if (ST0 & ST0_ECE) {
1601                 switch(DRS->track){
1602                         case NEED_1_RECAL:
1603 #ifdef DEBUGT
1604                                 debugt("recal interrupt need 1 recal:");
1605 #endif
1606                                 /* after a second recalibrate, we still haven't
1607                                  * reached track 0. Probably no drive. Raise an
1608                                  * error, as failing immediately might upset
1609                                  * computers possessed by the Devil :-) */
1610                                 cont->error();
1611                                 cont->redo();
1612                                 return;
1613                         case NEED_2_RECAL:
1614 #ifdef DEBUGT
1615                                 debugt("recal interrupt need 2 recal:");
1616 #endif
1617                                 /* If we already did a recalibrate,
1618                                  * and we are not at track 0, this
1619                                  * means we have moved. (The only way
1620                                  * not to move at recalibration is to
1621                                  * be already at track 0.) Clear the
1622                                  * new change flag */
1623 #ifdef DCL_DEBUG
1624                                 if (DP->flags & FD_DEBUG){
1625                                         DPRINT("clearing NEWCHANGE flag because of second recalibrate\n");
1626                                 }
1627 #endif
1628 
1629                                 CLEARF(FD_DISK_NEWCHANGE);
1630                                 DRS->select_date = jiffies;
1631                                 /* fall through */
1632                         default:
1633 #ifdef DEBUGT
1634                                 debugt("recal interrupt default:");
1635 #endif
1636                                 /* Recalibrate moves the head by at
1637                                  * most 80 steps. If after one
1638                                  * recalibrate we don't have reached
1639                                  * track 0, this might mean that we
1640                                  * started beyond track 80.  Try
1641                                  * again.  */
1642                                 DRS->track = NEED_1_RECAL;
1643                                 break;
1644                 }
1645         } else
1646                 DRS->track = ST1;
1647         floppy_ready();
1648 }
1649 
1650 /*
1651  * Unexpected interrupt - Print as much debugging info as we can...
1652  * All bets are off...
1653  */
1654 static void unexpected_floppy_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1655 {
1656         int i;
1657         if (initialising)
1658                 return;
1659         if (print_unex){
1660                 DPRINT("unexpected interrupt\n");
1661                 if (inr >= 0)
1662                         for (i=0; i<inr; i++)
1663                                 printk("%d %x\n", i, reply_buffer[i]);
1664         }
1665         FDCS->reset = 0;        /* Allow SENSEI to be sent. */
1666         while(1){
1667                 output_byte(FD_SENSEI);
1668                 inr=result();
1669                 if (inr != 2)
1670                         break;
1671                 if (print_unex){
1672                         printk("sensei\n");
1673                         for (i=0; i<inr; i++)
1674                                 printk("%d %x\n", i, reply_buffer[i]);
1675                 }
1676         }
1677         FDCS->reset = 1;
1678 }
1679 
1680 static struct tq_struct floppy_tq =
1681 { 0, 0, (void *) (void *) unexpected_floppy_interrupt, 0 };
1682 
1683 /* interrupt handler */
1684 void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs)
     /* [previous][next][first][last][top][bottom][index][help] */
1685 {
1686         void (*handler)(void) = DEVICE_INTR;
1687 
1688         lasthandler = handler;
1689         interruptjiffies = jiffies;
1690 
1691         fd_disable_dma();
1692         floppy_enable_hlt();
1693         CLEAR_INTR;
1694         if (fdc >= N_FDC || FDCS->address == -1){
1695                 /* we don't even know which FDC is the culprit */
1696                 printk("DOR0=%x\n", fdc_state[0].dor);
1697                 printk("floppy interrupt on bizarre fdc %d\n",fdc);
1698                 printk("handler=%p\n", handler);
1699                 is_alive("bizarre fdc");
1700                 return;
1701         }
1702         inr = result();
1703         if (!handler){
1704                 unexpected_floppy_interrupt();
1705                 is_alive("unexpected");
1706                 return;
1707         }
1708         if (inr == 0){
1709                 do {
1710                         output_byte(FD_SENSEI);
1711                         inr = result();
1712                 } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2);
1713         }
1714         floppy_tq.routine = (void *)(void *) handler;
1715         queue_task_irq(&floppy_tq, &tq_timer);
1716         is_alive("normal interrupt end");
1717 }
1718 
1719 static void recalibrate_floppy(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1720 {
1721 #ifdef DEBUGT
1722         debugt("recalibrate floppy:");
1723 #endif
1724         SET_INTR(recal_interrupt);
1725         output_byte(FD_RECALIBRATE);
1726         LAST_OUT(UNIT(current_drive));
1727 }
1728 
1729 /*
1730  * Must do 4 FD_SENSEIs after reset because of ``drive polling''.
1731  */
1732 static void reset_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1733 {
1734 #ifdef DEBUGT
1735         debugt("reset interrupt:");
1736 #endif
1737         result();               /* get the status ready for set_fdc */
1738         if (FDCS->reset) {
1739                 printk("reset set in interrupt, calling %p\n", cont->error);
1740                 cont->error(); /* a reset just after a reset. BAD! */
1741         }
1742         cont->redo();
1743 }
1744 
1745 /*
1746  * reset is done by pulling bit 2 of DOR low for a while (old FDCs),
1747  * or by setting the self clearing bit 7 of STATUS (newer FDCs)
1748  */
1749 static void reset_fdc(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1750 {
1751         SET_INTR(reset_interrupt);
1752         FDCS->reset = 0;
1753         reset_fdc_info(0);
1754 
1755         /* Pseudo-DMA may intercept 'reset finished' interrupt.  */
1756         /* Irrelevant for systems with true DMA (i386).          */
1757         fd_disable_dma();
1758 
1759         if (FDCS->version >= FDC_82072A)
1760                 fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS);
1761         else {
1762                 fd_outb(FDCS->dor & ~0x04, FD_DOR);
1763                 udelay(FD_RESET_DELAY);
1764                 fd_outb(FDCS->dor, FD_DOR);
1765         }
1766 }
1767 
1768 static void empty(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1769 {
1770 }
1771 
1772 void show_floppy(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1773 {
1774         int i;
1775 
1776         printk("\n");
1777         printk("floppy driver state\n");
1778         printk("-------------------\n");
1779         printk("now=%ld last interrupt=%d last called handler=%p\n",
1780                jiffies, interruptjiffies, lasthandler);
1781 
1782 
1783 #ifdef FLOPPY_SANITY_CHECK
1784         printk("timeout_message=%s\n", timeout_message);
1785         printk("last output bytes:\n");
1786         for (i=0; i < OLOGSIZE; i++)
1787                 printk("%2x %2x %ld\n",
1788                        output_log[(i+output_log_pos) % OLOGSIZE].data,
1789                        output_log[(i+output_log_pos) % OLOGSIZE].status,
1790                        output_log[(i+output_log_pos) % OLOGSIZE].jiffies);
1791         printk("last result at %d\n", resultjiffies);
1792         printk("last redo_fd_request at %d\n", lastredo);
1793         for (i=0; i<resultsize; i++){
1794                 printk("%2x ", reply_buffer[i]);
1795         }
1796         printk("\n");
1797 #endif
1798 
1799         printk("status=%x\n", fd_inb(FD_STATUS));
1800         printk("fdc_busy=%d\n", fdc_busy);
1801         if (DEVICE_INTR)
1802                 printk("DEVICE_INTR=%p\n", DEVICE_INTR);
1803         if (floppy_tq.sync)
1804                 printk("floppy_tq.routine=%p\n", floppy_tq.routine);
1805         if (fd_timer.prev)
1806                 printk("fd_timer.function=%p\n", fd_timer.function);
1807         if (fd_timeout.prev){
1808                 printk("timer_table=%p\n",fd_timeout.function);
1809                 printk("expires=%ld\n",fd_timeout.expires-jiffies);
1810                 printk("now=%ld\n",jiffies);
1811         }
1812         printk("cont=%p\n", cont);
1813         printk("CURRENT=%p\n", CURRENT);
1814         printk("command_status=%d\n", command_status);
1815         printk("\n");
1816 }
1817 
1818 static void floppy_shutdown(unsigned long mode)
     /* [previous][next][first][last][top][bottom][index][help] */
1819 {
1820         if (!initialising && !mode)
1821                 show_floppy();
1822         CLEAR_INTR;
1823         floppy_tq.routine = (void *)(void *) empty;
1824         del_timer(&fd_timer);
1825         sti();
1826 
1827         floppy_enable_hlt();
1828         fd_disable_dma();
1829         /* avoid dma going to a random drive after shutdown */
1830 
1831         if (!initialising && !mode)
1832                 DPRINT("floppy timeout\n");
1833         FDCS->reset = 1;
1834         if (cont){
1835                 cont->done(0);
1836                 cont->redo(); /* this will recall reset when needed */
1837         } else {
1838                 printk("no cont in shutdown!\n");
1839                 process_fd_request();
1840         }
1841         is_alive("floppy shutdown");
1842 }
1843 /*typedef void (*timeout_fn)(unsigned long);*/
1844 
1845 /* start motor, check media-changed condition and write protection */
1846 static int start_motor(void (*function)(void) )
     /* [previous][next][first][last][top][bottom][index][help] */
1847 {
1848         int mask, data;
1849 
1850         mask = 0xfc;
1851         data = UNIT(current_drive);
1852         if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){
1853                 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){
1854                         set_debugt();
1855                         /* no read since this drive is running */
1856                         DRS->first_read_date = 0;
1857                         /* note motor start time if motor is not yet running */
1858                         DRS->spinup_date = jiffies;
1859                         data |= (0x10 << UNIT(current_drive));
1860                 }
1861         } else
1862                 if (FDCS->dor & (0x10 << UNIT(current_drive)))
1863                         mask &= ~(0x10 << UNIT(current_drive));
1864 
1865         /* starts motor and selects floppy */
1866         del_timer(motor_off_timer + current_drive);
1867         set_dor(fdc, mask, data);
1868 
1869         /* wait_for_completion also schedules reset if needed. */
1870         return(wait_for_completion(DRS->select_date+DP->select_delay,
1871                                    (timeout_fn) function));
1872 }
1873 
1874 static void floppy_ready(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1875 {
1876         CHECK_RESET;
1877         if (start_motor(floppy_ready)) return;
1878         if (fdc_dtr()) return;
1879 
1880 #ifdef DCL_DEBUG
1881         if (DP->flags & FD_DEBUG){
1882                 DPRINT("calling disk change from floppy_ready\n");
1883         }
1884 #endif
1885 
1886         if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) &&
1887            disk_change(current_drive) &&
1888            !DP->select_delay)
1889                 twaddle(); /* this clears the dcl on certain drive/controller
1890                             * combinations */
1891 
1892         if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){
1893                 perpendicular_mode();
1894                 fdc_specify(); /* must be done here because of hut, hlt ... */
1895                 seek_floppy();
1896         } else
1897                 setup_rw_floppy();
1898 }
1899 
1900 static void floppy_start(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1901 {
1902         reschedule_timeout(CURRENTD, "floppy start", 0);
1903 
1904         scandrives();
1905 #ifdef DCL_DEBUG
1906         if (DP->flags & FD_DEBUG){
1907                 DPRINT("setting NEWCHANGE in floppy_start\n");
1908         }
1909 #endif
1910         SETF(FD_DISK_NEWCHANGE);
1911         floppy_ready();
1912 }
1913 
1914 /*
1915  * ========================================================================
1916  * here ends the bottom half. Exported routines are:
1917  * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc,
1918  * start_motor, reset_fdc, reset_fdc_info, interpret_errors.
1919  * Initialization also uses output_byte, result, set_dor, floppy_interrupt
1920  * and set_dor.
1921  * ========================================================================
1922  */
1923 /*
1924  * General purpose continuations.
1925  * ==============================
1926  */
1927 
1928 static void do_wakeup(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1929 {
1930         reschedule_timeout(MAXTIMEOUT, "do wakeup", 0);
1931         cont = 0;
1932         command_status += 2;
1933         wake_up(&command_done);
1934 }
1935 
1936 static struct cont_t wakeup_cont={
1937         empty,
1938         do_wakeup,
1939         empty,
1940         (done_f)empty
1941 };
1942 
1943 static int wait_til_done(void (*handler)(void), int interruptible)
     /* [previous][next][first][last][top][bottom][index][help] */
1944 {
1945         int ret;
1946 
1947         floppy_tq.routine = (void *)(void *) handler;
1948         queue_task(&floppy_tq, &tq_timer);
1949 
1950         cli();
1951         while(command_status < 2 && NO_SIGNAL){
1952                 is_alive("wait_til_done");
1953                 if (interruptible)
1954                         interruptible_sleep_on(&command_done);
1955                 else
1956                         sleep_on(&command_done);
1957         }
1958         if (command_status < 2){
1959                 floppy_shutdown(1);
1960                 sti();
1961                 process_fd_request();
1962                 return -EINTR;
1963         }
1964         sti();
1965 
1966         if (FDCS->reset)
1967                 command_status = FD_COMMAND_ERROR;
1968         if (command_status == FD_COMMAND_OKAY)
1969                 ret=0;
1970         else
1971                 ret=-EIO;
1972         command_status = FD_COMMAND_NONE;
1973         return ret;
1974 }
1975 
1976 static void generic_done(int result)
     /* [previous][next][first][last][top][bottom][index][help] */
1977 {
1978         command_status = result;
1979         cont = &wakeup_cont;
1980 }
1981 
1982 static void generic_success(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1983 {
1984         cont->done(1);
1985 }
1986 
1987 static void generic_failure(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1988 {
1989         cont->done(0);
1990 }
1991 
1992 static void success_and_wakeup(void)
     /* [previous][next][first][last][top][bottom][index][help] */
1993 {
1994         generic_success();
1995         cont->redo();
1996 }
1997 
1998 
1999 /*
2000  * formatting and rw support.
2001  * ==========================
2002  */
2003 
2004 static int next_valid_format(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2005 {
2006         int probed_format;
2007 
2008         probed_format = DRS->probed_format;
2009         while(1){
2010                 if (probed_format >= 8 ||
2011                      !DP->autodetect[probed_format]){
2012                         DRS->probed_format = 0;
2013                         return 1;
2014                 }
2015                 if (floppy_type[DP->autodetect[probed_format]].sect){
2016                         DRS->probed_format = probed_format;
2017                         return 0;
2018                 }
2019                 probed_format++;
2020         }
2021 }
2022 
2023 static void bad_flp_intr(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2024 {
2025         if (probing){
2026                 DRS->probed_format++;
2027                 if (!next_valid_format())
2028                         return;
2029         }
2030         (*errors)++;
2031         INFBOUND(DRWE->badness, *errors);
2032         if (*errors > DP->max_errors.abort)
2033                 cont->done(0);
2034         if (*errors > DP->max_errors.reset)
2035                 FDCS->reset = 1;
2036         else if (*errors > DP->max_errors.recal)
2037                 DRS->track = NEED_2_RECAL;
2038 }
2039 
2040 static void set_floppy(kdev_t device)
     /* [previous][next][first][last][top][bottom][index][help] */
2041 {
2042         if (TYPE(device))
2043                 _floppy = TYPE(device) + floppy_type;
2044         else
2045                 _floppy = current_type[ DRIVE(device) ];
2046 }
2047 
2048 /*
2049  * formatting and support.
2050  * =======================
2051  */
2052 static void format_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2053 {
2054         switch (interpret_errors()){
2055                 case 1:
2056                         cont->error();
2057                 case 2:
2058                         break;
2059                 case 0:
2060                         cont->done(1);
2061         }
2062         cont->redo();
2063 }
2064 
2065 #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2)
2066 #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1))
2067 #define CT(x) ((x) | 0x40)
2068 static void setup_format_params(int track)
     /* [previous][next][first][last][top][bottom][index][help] */
2069 {
2070         struct fparm {
2071                 unsigned char track,head,sect,size;
2072         } *here = (struct fparm *)floppy_track_buffer;
2073         int il,n;
2074         int count,head_shift,track_shift;
2075 
2076         raw_cmd = &default_raw_cmd;
2077         raw_cmd->track = track;
2078 
2079         raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN |
2080                 /*FD_RAW_NEED_DISK |*/ FD_RAW_NEED_SEEK;
2081         raw_cmd->rate = _floppy->rate & 0x43;
2082         raw_cmd->cmd_count = NR_F;
2083         COMMAND = FM_MODE(_floppy,FD_FORMAT);
2084         DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head);
2085         F_SIZECODE = FD_SIZECODE(_floppy);
2086         F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE;
2087         F_GAP = _floppy->fmt_gap;
2088         F_FILL = FD_FILL_BYTE;
2089 
2090         raw_cmd->kernel_data = floppy_track_buffer;
2091         raw_cmd->length = 4 * F_SECT_PER_TRACK;
2092 
2093         /* allow for about 30ms for data transport per track */
2094         head_shift  = (F_SECT_PER_TRACK + 5) / 6;
2095 
2096         /* a ``cylinder'' is two tracks plus a little stepping time */
2097         track_shift = 2 * head_shift + 3;
2098 
2099         /* position of logical sector 1 on this track */
2100         n = (track_shift * format_req.track + head_shift * format_req.head)
2101                 % F_SECT_PER_TRACK;
2102 
2103         /* determine interleave */
2104         il = 1;
2105         if (_floppy->sect > DP->interleave_sect && F_SIZECODE == 2)
2106                 il++;
2107 
2108         /* initialize field */
2109         for (count = 0; count < F_SECT_PER_TRACK; ++count) {
2110                 here[count].track = format_req.track;
2111                 here[count].head = format_req.head;
2112                 here[count].sect = 0;
2113                 here[count].size = F_SIZECODE;
2114         }
2115         /* place logical sectors */
2116         for (count = 1; count <= F_SECT_PER_TRACK; ++count) {
2117                 here[n].sect = count;
2118                 n = (n+il) % F_SECT_PER_TRACK;
2119                 if (here[n].sect) { /* sector busy, find next free sector */
2120                         ++n;
2121                         if (n>= F_SECT_PER_TRACK) {
2122                                 n-=F_SECT_PER_TRACK;
2123                                 while (here[n].sect) ++n;
2124                         }
2125                 }
2126         }
2127 }
2128 
2129 static void redo_format(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2130 {
2131         buffer_track = -1;
2132         setup_format_params(format_req.track << STRETCH(_floppy));
2133         floppy_start();
2134 #ifdef DEBUGT
2135         debugt("queue format request");
2136 #endif
2137 }
2138 
2139 static struct cont_t format_cont={
2140         format_interrupt,
2141         redo_format,
2142         bad_flp_intr,
2143         generic_done };
2144 
2145 static int do_format(kdev_t device, struct format_descr *tmp_format_req)
     /* [previous][next][first][last][top][bottom][index][help] */
2146 {
2147         int ret;
2148         int drive=DRIVE(device);
2149 
2150         LOCK_FDC(drive,1);
2151         set_floppy(device);
2152         if (!_floppy ||
2153             _floppy->track > DP->tracks ||
2154             tmp_format_req->track >= _floppy->track ||
2155             tmp_format_req->head >= _floppy->head ||
2156             (_floppy->sect << 2) % (1 <<  FD_SIZECODE(_floppy)) ||
2157             !_floppy->fmt_gap) {
2158                 process_fd_request();
2159                 return -EINVAL;
2160         }
2161         format_req = *tmp_format_req;
2162         format_errors = 0;
2163         cont = &format_cont;
2164         errors = &format_errors;
2165         IWAIT(redo_format);
2166         process_fd_request();
2167         return ret;
2168 }
2169 
2170 /*
2171  * Buffer read/write and support
2172  * =============================
2173  */
2174 
2175 /* new request_done. Can handle physical sectors which are smaller than a
2176  * logical buffer */
2177 static void request_done(int uptodate)
     /* [previous][next][first][last][top][bottom][index][help] */
2178 {
2179         int block;
2180 
2181         probing = 0;
2182         reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate);
2183 
2184         if (!CURRENT){
2185                 DPRINT("request list destroyed in floppy request done\n");
2186                 return;
2187         }
2188 
2189         if (uptodate){
2190                 /* maintain values for invalidation on geometry
2191                  * change */
2192                 block = current_count_sectors + CURRENT->sector;
2193                 INFBOUND(DRS->maxblock, block);
2194                 if (block > _floppy->sect)
2195                         DRS->maxtrack = 1;
2196 
2197                 /* unlock chained buffers */
2198                 while (current_count_sectors && CURRENT &&
2199                        current_count_sectors >= CURRENT->current_nr_sectors){
2200                         current_count_sectors -= CURRENT->current_nr_sectors;
2201                         CURRENT->nr_sectors -= CURRENT->current_nr_sectors;
2202                         CURRENT->sector += CURRENT->current_nr_sectors;
2203                         end_request(1);
2204                 }
2205                 if (current_count_sectors && CURRENT){
2206                         /* "unlock" last subsector */
2207                         CURRENT->buffer += current_count_sectors <<9;
2208                         CURRENT->current_nr_sectors -= current_count_sectors;
2209                         CURRENT->nr_sectors -= current_count_sectors;
2210                         CURRENT->sector += current_count_sectors;
2211                         return;
2212                 }
2213 
2214                 if (current_count_sectors && !CURRENT)
2215                         DPRINT("request list destroyed in floppy request done\n");
2216 
2217         } else {
2218                 if (CURRENT->cmd == WRITE) {
2219                         /* record write error information */
2220                         DRWE->write_errors++;
2221                         if (DRWE->write_errors == 1) {
2222                                 DRWE->first_error_sector = CURRENT->sector;
2223                                 DRWE->first_error_generation = DRS->generation;
2224                         }
2225                         DRWE->last_error_sector = CURRENT->sector;
2226                         DRWE->last_error_generation = DRS->generation;
2227                 }
2228                 end_request(0);
2229         }
2230 }
2231 
2232 /* Interrupt handler evaluating the result of the r/w operation */
2233 static void rw_interrupt(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2234 {
2235         int nr_sectors, ssize, eoc;
2236 
2237         if (!DRS->first_read_date)
2238                 DRS->first_read_date = jiffies;
2239 
2240         nr_sectors = 0;
2241         CODE2SIZE;
2242 
2243         if(ST1 & ST1_EOC)
2244                 eoc = 1;
2245         else
2246                 eoc = 0;
2247         nr_sectors = ((R_TRACK-TRACK)*_floppy->head+R_HEAD-HEAD) *
2248                 _floppy->sect + ((R_SECTOR-SECTOR+eoc) <<  SIZECODE >> 2) -
2249                 (sector_t % _floppy->sect) % ssize;
2250 
2251 #ifdef FLOPPY_SANITY_CHECK
2252         if (nr_sectors > current_count_sectors + ssize -
2253              (current_count_sectors + sector_t) % ssize +
2254              sector_t % ssize){
2255                 DPRINT2("long rw: %x instead of %lx\n",
2256                         nr_sectors, current_count_sectors);
2257                 printk("rs=%d s=%d\n", R_SECTOR, SECTOR);
2258                 printk("rh=%d h=%d\n", R_HEAD, HEAD);
2259                 printk("rt=%d t=%d\n", R_TRACK, TRACK);
2260                 printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK,
2261                        sector_t, ssize);
2262         }
2263 #endif
2264         INFBOUND(nr_sectors,0);
2265         SUPBOUND(current_count_sectors, nr_sectors);
2266 
2267         switch (interpret_errors()){
2268                 case 2:
2269                         cont->redo();
2270                         return;
2271                 case 1:
2272                         if (!current_count_sectors){
2273                                 cont->error();
2274                                 cont->redo();
2275                                 return;
2276                         }
2277                         break;
2278                 case 0:
2279                         if (!current_count_sectors){
2280                                 cont->redo();
2281                                 return;
2282                         }
2283                         current_type[current_drive] = _floppy;
2284                         floppy_sizes[TOMINOR(current_drive) ]= _floppy->size>>1;
2285                         break;
2286         }
2287 
2288         if (probing) {
2289                 if (DP->flags & FTD_MSG)
2290                         DPRINT2("Auto-detected floppy type %s in fd%d\n",
2291                                 _floppy->name,current_drive);
2292                 current_type[current_drive] = _floppy;
2293                 floppy_sizes[TOMINOR(current_drive)] = _floppy->size >> 1;
2294                 probing = 0;
2295         }
2296 
2297         if (CT(COMMAND) != FD_READ || 
2298              raw_cmd->kernel_data == CURRENT->buffer){
2299                 /* transfer directly from buffer */
2300                 cont->done(1);
2301         } else if (CT(COMMAND) == FD_READ){
2302                 buffer_track = raw_cmd->track;
2303                 buffer_drive = current_drive;
2304                 INFBOUND(buffer_max, nr_sectors + sector_t);
2305         }
2306         cont->redo();
2307 }
2308 
2309 /* Compute maximal contiguous buffer size. */
2310 static int buffer_chain_size(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2311 {
2312         struct buffer_head *bh;
2313         int size;
2314         char *base;
2315 
2316         base = CURRENT->buffer;
2317         size = CURRENT->current_nr_sectors << 9;
2318         bh = CURRENT->bh;
2319 
2320         if (bh){
2321                 bh = bh->b_reqnext;
2322                 while (bh && bh->b_data == base + size){
2323                         size += bh->b_size;
2324                         bh = bh->b_reqnext;
2325                 }
2326         }
2327         return size >> 9;
2328 }
2329 
2330 /* Compute the maximal transfer size */
2331 static int transfer_size(int ssize, int max_sector, int max_size)
     /* [previous][next][first][last][top][bottom][index][help] */
2332 {
2333         SUPBOUND(max_sector, sector_t + max_size);
2334 
2335         /* alignment */
2336         max_sector -= (max_sector % _floppy->sect) % ssize;
2337 
2338         /* transfer size, beginning not aligned */
2339         current_count_sectors = max_sector - sector_t ;
2340 
2341         return max_sector;
2342 }
2343 
2344 /*
2345  * Move data from/to the track buffer to/from the buffer cache.
2346  */
2347 static void copy_buffer(int ssize, int max_sector, int max_sector_2)
     /* [previous][next][first][last][top][bottom][index][help] */
2348 {
2349         int remaining; /* number of transferred 512-byte sectors */
2350         struct buffer_head *bh;
2351         char *buffer, *dma_buffer;
2352         int size;
2353 
2354         max_sector = transfer_size(ssize,
2355                                    minimum(max_sector, max_sector_2),
2356                                    CURRENT->nr_sectors);
2357 
2358         if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE &&
2359             buffer_max > sector_t + CURRENT->nr_sectors)
2360                 current_count_sectors = minimum(buffer_max - sector_t,
2361                                                 CURRENT->nr_sectors);
2362 
2363         remaining = current_count_sectors << 9;
2364 #ifdef FLOPPY_SANITY_CHECK
2365         if ((remaining >> 9) > CURRENT->nr_sectors  &&
2366             CT(COMMAND) == FD_WRITE){
2367                 DPRINT("in copy buffer\n");
2368                 printk("current_count_sectors=%ld\n", current_count_sectors);
2369                 printk("remaining=%d\n", remaining >> 9);
2370                 printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors);
2371                 printk("CURRENT->current_nr_sectors=%ld\n",
2372                        CURRENT->current_nr_sectors);
2373                 printk("max_sector=%d\n", max_sector);
2374                 printk("ssize=%d\n", ssize);
2375         }
2376 #endif
2377 
2378         buffer_max = maximum(max_sector, buffer_max);
2379 
2380         dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9);
2381 
2382         bh = CURRENT->bh;
2383         size = CURRENT->current_nr_sectors << 9;
2384         buffer = CURRENT->buffer;
2385 
2386         while (remaining > 0){
2387                 SUPBOUND(size, remaining);
2388 #ifdef FLOPPY_SANITY_CHECK
2389                 if (dma_buffer + size >
2390                     floppy_track_buffer + (max_buffer_sectors << 10) ||
2391                     dma_buffer < floppy_track_buffer){
2392                         DPRINT1("buffer overrun in copy buffer %d\n",
2393                                 (int) ((floppy_track_buffer - dma_buffer) >>9));
2394                         printk("sector_t=%d buffer_min=%d\n",
2395                                sector_t, buffer_min);
2396                         printk("current_count_sectors=%ld\n",
2397                                current_count_sectors);
2398                         if (CT(COMMAND) == FD_READ)
2399                                 printk("read\n");
2400                         if (CT(COMMAND) == FD_READ)
2401                                 printk("write\n");
2402                         break;
2403                 }
2404                 if (((unsigned long)buffer) % 512)
2405                         DPRINT1("%p buffer not aligned\n", buffer);
2406 #endif
2407                 if (CT(COMMAND) == FD_READ) {
2408                         fd_cacheflush(dma_buffer, size);
2409                         memcpy(buffer, dma_buffer, size);
2410                 } else {
2411                         memcpy(dma_buffer, buffer, size);
2412                         fd_cacheflush(dma_buffer, size);
2413                 }
2414                 remaining -= size;
2415                 if (!remaining)
2416                         break;
2417 
2418                 dma_buffer += size;
2419                 bh = bh->b_reqnext;
2420 #ifdef FLOPPY_SANITY_CHECK
2421                 if (!bh){
2422                         DPRINT("bh=null in copy buffer after copy\n");
2423                         break;
2424                 }
2425 #endif
2426                 size = bh->b_size;
2427                 buffer = bh->b_data;
2428         }
2429 #ifdef FLOPPY_SANITY_CHECK
2430         if (remaining){
2431                 if (remaining > 0)
2432                         max_sector -= remaining >> 9;
2433                 DPRINT1("weirdness: remaining %d\n", remaining>>9);
2434         }
2435 #endif
2436 }
2437 
2438 /*
2439  * Formulate a read/write request.
2440  * this routine decides where to load the data (directly to buffer, or to
2441  * tmp floppy area), how much data to load (the size of the buffer, the whole
2442  * track, or a single sector)
2443  * All floppy_track_buffer handling goes in here. If we ever add track buffer
2444  * allocation on the fly, it should be done here. No other part should need
2445  * modification.
2446  */
2447 
2448 static int make_raw_rw_request(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2449 {
2450         int aligned_sector_t;
2451         int max_sector, max_size, tracksize, ssize;
2452 
2453         set_fdc(DRIVE(CURRENT->rq_dev));
2454 
2455         raw_cmd = &default_raw_cmd;
2456         raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK |
2457                 FD_RAW_NEED_SEEK;
2458         raw_cmd->cmd_count = NR_RW;
2459         if (CURRENT->cmd == READ){
2460                 raw_cmd->flags |= FD_RAW_READ;
2461                 COMMAND = FM_MODE(_floppy,FD_READ);
2462         } else if (CURRENT->cmd == WRITE){
2463                 raw_cmd->flags |= FD_RAW_WRITE;
2464                 COMMAND = FM_MODE(_floppy,FD_WRITE);
2465         } else {
2466                 DPRINT("make_raw_rw_request: unknown command\n");
2467                 return 0;
2468         }
2469 
2470         max_sector = _floppy->sect * _floppy->head;
2471 
2472         TRACK = CURRENT->sector / max_sector;
2473         sector_t = CURRENT->sector % max_sector;
2474         if (_floppy->track && TRACK >= _floppy->track)
2475                 return 0;
2476         HEAD = sector_t / _floppy->sect;
2477 
2478         if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) &&
2479             sector_t < _floppy->sect)
2480                 max_sector = _floppy->sect;
2481 
2482         /* 2M disks have phantom sectors on the first track */
2483         if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){
2484                 max_sector = 2 * _floppy->sect / 3;
2485                 if (sector_t >= max_sector){
2486                         current_count_sectors = minimum(_floppy->sect - sector_t,
2487                                                         CURRENT->nr_sectors);
2488                         return 1;
2489                 }
2490                 SIZECODE = 2;
2491         } else
2492                 SIZECODE = FD_SIZECODE(_floppy);
2493         raw_cmd->rate = _floppy->rate & 0x43;
2494         if ((_floppy->rate & FD_2M) &&
2495             (TRACK || HEAD) &&
2496             raw_cmd->rate == 2)
2497                 raw_cmd->rate = 1;
2498 
2499         if (SIZECODE)
2500                 SIZECODE2 = 0xff;
2501         else
2502                 SIZECODE2 = 0x80;
2503         raw_cmd->track = TRACK << STRETCH(_floppy);
2504         DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD);
2505         GAP = _floppy->gap;
2506         CODE2SIZE;
2507         SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE;
2508         SECTOR = ((sector_t % _floppy->sect) << 2 >> SIZECODE) + 1;
2509         tracksize = _floppy->sect - _floppy->sect % ssize;
2510         if (tracksize < _floppy->sect){
2511                 SECT_PER_TRACK ++;
2512                 if (tracksize <= sector_t % _floppy->sect)
2513                         SECTOR--;
2514                 while (tracksize <= sector_t % _floppy->sect){
2515                         while(tracksize + ssize > _floppy->sect){
2516                                 SIZECODE--;
2517                                 ssize >>= 1;
2518                         }
2519                         SECTOR++; SECT_PER_TRACK ++;
2520                         tracksize += ssize;
2521                 }
2522                 max_sector = HEAD * _floppy->sect + tracksize;
2523         } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing)
2524                 max_sector = _floppy->sect;
2525 
2526         aligned_sector_t = sector_t - (sector_t % _floppy->sect) % ssize;
2527         max_size = CURRENT->nr_sectors;
2528         if ((raw_cmd->track == buffer_track) && 
2529             (current_drive == buffer_drive) &&
2530             (sector_t >= buffer_min) && (sector_t < buffer_max)) {
2531                 /* data already in track buffer */
2532                 if (CT(COMMAND) == FD_READ) {
2533                         copy_buffer(1, max_sector, buffer_max);
2534                         return 1;
2535                 }
2536         } else if (aligned_sector_t != sector_t || CURRENT->nr_sectors < ssize){
2537                 if (CT(COMMAND) == FD_WRITE){
2538                         if (sector_t + CURRENT->nr_sectors > ssize &&
2539                             sector_t + CURRENT->nr_sectors < ssize + ssize)
2540                                 max_size = ssize + ssize;
2541                         else
2542                                 max_size = ssize;
2543                 }
2544                 raw_cmd->flags &= ~FD_RAW_WRITE;
2545                 raw_cmd->flags |= FD_RAW_READ;
2546                 COMMAND = FM_MODE(_floppy,FD_READ);
2547         } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) {
2548                 unsigned long dma_limit;
2549                 int direct, indirect;
2550 
2551                 indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) -
2552                         sector_t;
2553 
2554                 /*
2555                  * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide
2556                  * on a 64 bit machine!
2557                  */
2558                 max_size = buffer_chain_size();
2559                 dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9;
2560                 if ((unsigned long) max_size > dma_limit) {
2561                         max_size = dma_limit;
2562                 }
2563                 /* 64 kb boundaries */
2564                 if (CROSS_64KB(CURRENT->buffer, max_size << 9))
2565                         max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9;
2566                 direct = transfer_size(ssize,max_sector,max_size) - sector_t;
2567                 /*
2568                  * We try to read tracks, but if we get too many errors, we
2569                  * go back to reading just one sector at a time.
2570                  *
2571                  * This means we should be able to read a sector even if there
2572                  * are other bad sectors on this track.
2573                  */
2574                 if (!direct ||
2575                     (indirect * 2 > direct * 3 &&
2576                      *errors < DP->max_errors.read_track &&
2577                      /*!TESTF(FD_NEED_TWADDLE) &&*/
2578                      ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){
2579                         max_size = CURRENT->nr_sectors;
2580                 } else {
2581                         raw_cmd->kernel_data = CURRENT->buffer;
2582                         raw_cmd->length = current_count_sectors << 9;
2583                         if (raw_cmd->length == 0){
2584                                 DPRINT("zero dma transfer attempted from make_raw_request\n");
2585                                 DPRINT3("indirect=%d direct=%d sector_t=%d",
2586                                         indirect, direct, sector_t);
2587                                 return 0;
2588                         }
2589                         return 2;
2590                 }
2591         }
2592 
2593         if (CT(COMMAND) == FD_READ)
2594                 max_size = max_sector; /* unbounded */
2595 
2596         /* claim buffer track if needed */
2597         if (buffer_track != raw_cmd->track ||  /* bad track */
2598             buffer_drive !=current_drive || /* bad drive */
2599             sector_t > buffer_max ||
2600             sector_t < buffer_min ||
2601             ((CT(COMMAND) == FD_READ ||
2602               (aligned_sector_t == sector_t && CURRENT->nr_sectors >= ssize))&&
2603              max_sector > 2 * max_buffer_sectors + buffer_min &&
2604              max_size + sector_t > 2 * max_buffer_sectors + buffer_min)
2605             /* not enough space */){
2606                 buffer_track = -1;
2607                 buffer_drive = current_drive;
2608                 buffer_max = buffer_min = aligned_sector_t;
2609         }
2610         raw_cmd->kernel_data = floppy_track_buffer + 
2611                 ((aligned_sector_t-buffer_min)<<9);
2612 
2613         if (CT(COMMAND) == FD_WRITE){
2614                 /* copy write buffer to track buffer.
2615                  * if we get here, we know that the write
2616                  * is either aligned or the data already in the buffer
2617                  * (buffer will be overwritten) */
2618 #ifdef FLOPPY_SANITY_CHECK
2619                 if (sector_t != aligned_sector_t && buffer_track == -1)
2620                         DPRINT("internal error offset !=0 on write\n");
2621 #endif
2622                 buffer_track = raw_cmd->track;
2623                 buffer_drive = current_drive;
2624                 copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min);
2625         } else
2626                 transfer_size(ssize, max_sector,
2627                               2*max_buffer_sectors+buffer_min-aligned_sector_t);
2628 
2629         /* round up current_count_sectors to get dma xfer size */
2630         raw_cmd->length = sector_t+current_count_sectors-aligned_sector_t;
2631         raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1;
2632         raw_cmd->length <<= 9;
2633 #ifdef FLOPPY_SANITY_CHECK
2634         if ((raw_cmd->length < current_count_sectors << 9) ||
2635             (raw_cmd->kernel_data != CURRENT->buffer &&
2636              CT(COMMAND) == FD_WRITE &&
2637              (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max ||
2638               aligned_sector_t < buffer_min)) ||
2639             raw_cmd->length % (128 << SIZECODE) ||
2640             raw_cmd->length <= 0 || current_count_sectors <= 0){
2641                 DPRINT2("fractionary current count b=%lx s=%lx\n",
2642                         raw_cmd->length, current_count_sectors);
2643                 if (raw_cmd->kernel_data != CURRENT->buffer)
2644                         printk("addr=%d, length=%ld\n",
2645                                (int) ((raw_cmd->kernel_data - 
2646                                        floppy_track_buffer) >> 9),
2647                                current_count_sectors);
2648                 printk("st=%d ast=%d mse=%d msi=%d\n",
2649                        sector_t, aligned_sector_t, max_sector, max_size);
2650                 printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE);
2651                 printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n",
2652                        COMMAND, SECTOR, HEAD, TRACK);
2653                 printk("buffer drive=%d\n", buffer_drive);
2654                 printk("buffer track=%d\n", buffer_track);
2655                 printk("buffer_min=%d\n", buffer_min);
2656                 printk("buffer_max=%d\n", buffer_max);
2657                 return 0;
2658         }
2659 
2660         if (raw_cmd->kernel_data != CURRENT->buffer){
2661                 if (raw_cmd->kernel_data < floppy_track_buffer ||
2662                     current_count_sectors < 0 ||
2663                     raw_cmd->length < 0 ||
2664                     raw_cmd->kernel_data + raw_cmd->length >
2665                     floppy_track_buffer + (max_buffer_sectors  << 10)){
2666                         DPRINT("buffer overrun in schedule dma\n");
2667                         printk("sector_t=%d buffer_min=%d current_count=%ld\n",
2668                                sector_t, buffer_min,
2669                                raw_cmd->length >> 9);
2670                         printk("current_count_sectors=%ld\n",
2671                                current_count_sectors);
2672                         if (CT(COMMAND) == FD_READ)
2673                                 printk("read\n");
2674                         if (CT(COMMAND) == FD_READ)
2675                                 printk("write\n");
2676                         return 0;
2677                 }
2678         } else if (raw_cmd->length > CURRENT->nr_sectors << 9 ||
2679                    current_count_sectors > CURRENT->nr_sectors){
2680                 DPRINT("buffer overrun in direct transfer\n");
2681                 return 0;
2682         } else if (raw_cmd->length < current_count_sectors << 9){
2683                 DPRINT("more sectors than bytes\n");
2684                 printk("bytes=%ld\n", raw_cmd->length >> 9);
2685                 printk("sectors=%ld\n", current_count_sectors);
2686         }
2687         if (raw_cmd->length == 0){
2688                 DPRINT("zero dma transfer attempted from make_raw_request\n");
2689                 return 0;
2690         }
2691 #endif
2692         return 2;
2693 }
2694 
2695 static void redo_fd_request(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2696 {
2697 #define REPEAT {request_done(0); continue; }
2698         kdev_t device;
2699         int tmp;
2700 
2701         lastredo = jiffies;
2702         if (current_drive < N_DRIVE)
2703                 floppy_off(current_drive);
2704 
2705         if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){
2706                 CLEAR_INTR;
2707                 unlock_fdc();
2708                 return;
2709         }
2710 
2711         while(1){
2712                 if (!CURRENT) {
2713                         CLEAR_INTR;
2714                         unlock_fdc();
2715                         return;
2716                 }
2717                 if (MAJOR(CURRENT->rq_dev) != MAJOR_NR)
2718                         panic(DEVICE_NAME ": request list destroyed");
2719                 if (CURRENT->bh && !buffer_locked(CURRENT->bh))
2720                         panic(DEVICE_NAME ": block not locked");
2721 
2722                 device = CURRENT->rq_dev;
2723                 set_fdc(DRIVE(device));
2724                 reschedule_timeout(CURRENTD, "redo fd request", 0);
2725 
2726                 set_floppy(device);
2727                 raw_cmd = & default_raw_cmd;
2728                 raw_cmd->flags = 0;
2729                 if (start_motor(redo_fd_request)) return;
2730                 if (test_bit(current_drive, &fake_change) ||
2731                    TESTF(FD_DISK_CHANGED)){
2732                         DPRINT("disk absent or changed during operation\n");
2733                         REPEAT;
2734                 }
2735                 if (!_floppy) { /* Autodetection */
2736                         if (!probing){
2737                                 DRS->probed_format = 0;
2738                                 if (next_valid_format()){
2739                                         DPRINT("no autodetectable formats\n");
2740                                         _floppy = NULL;
2741                                         REPEAT;
2742                                 }
2743                         }
2744                         probing = 1;
2745                         _floppy = floppy_type+DP->autodetect[DRS->probed_format];
2746                 } else
2747                         probing = 0;
2748                 errors = & (CURRENT->errors);
2749                 tmp = make_raw_rw_request();
2750                 if (tmp < 2){
2751                         request_done(tmp);
2752                         continue;
2753                 }
2754 
2755                 if (TESTF(FD_NEED_TWADDLE))
2756                         twaddle();
2757                 floppy_tq.routine = (void *)(void *) floppy_start;
2758                 queue_task(&floppy_tq, &tq_timer);
2759 #ifdef DEBUGT
2760                 debugt("queue fd request");
2761 #endif
2762                 return;
2763         }
2764 #undef REPEAT
2765 }
2766 
2767 static struct cont_t rw_cont={
2768         rw_interrupt,
2769         redo_fd_request,
2770         bad_flp_intr,
2771         request_done };
2772 
2773 static struct tq_struct request_tq =
2774 { 0, 0, (void *) (void *) redo_fd_request, 0 };
2775 
2776 static void process_fd_request(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2777 {
2778         cont = &rw_cont;
2779         queue_task(&request_tq, &tq_timer);
2780 }
2781 
2782 static void do_fd_request(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2783 {
2784         if (fdc_busy){
2785                 /* fdc busy, this new request will be treated when the
2786                    current one is done */
2787                 is_alive("do fd request, old request running");
2788                 return;
2789         }
2790         lock_fdc(MAXTIMEOUT,0);
2791         process_fd_request();
2792         is_alive("do fd request");
2793 }
2794 
2795 static struct cont_t poll_cont={
2796         success_and_wakeup,
2797         floppy_ready,
2798         generic_failure,
2799         generic_done };
2800 
2801 static int poll_drive(int interruptible, int flag)
     /* [previous][next][first][last][top][bottom][index][help] */
2802 {
2803         int ret;
2804         /* no auto-sense, just clear dcl */
2805         raw_cmd = &default_raw_cmd;
2806         raw_cmd->flags= flag;
2807         raw_cmd->track=0;
2808         raw_cmd->cmd_count=0;
2809         cont = &poll_cont;
2810 #ifdef DCL_DEBUG
2811         if (DP->flags & FD_DEBUG){
2812                 DPRINT("setting NEWCHANGE in poll_drive\n");
2813         }
2814 #endif
2815         SETF(FD_DISK_NEWCHANGE);
2816         WAIT(floppy_ready);
2817         return ret;
2818 }
2819 
2820 /*
2821  * User triggered reset
2822  * ====================
2823  */
2824 
2825 static void reset_intr(void)
     /* [previous][next][first][last][top][bottom][index][help] */
2826 {
2827         printk("weird, reset interrupt called\n");
2828 }
2829 
2830 static struct cont_t reset_cont={
2831         reset_intr,
2832         success_and_wakeup,
2833         generic_failure,
2834         generic_done };
2835 
2836 static int user_reset_fdc(int drive, int arg, int interruptible)
     /* [previous][next][first][last][top][bottom][index][help] */
2837 {
2838         int ret;
2839 
2840         ret=0;
2841         LOCK_FDC(drive,interruptible);
2842         if (arg == FD_RESET_ALWAYS)
2843                 FDCS->reset=1;
2844         if (FDCS->reset){
2845                 cont = &reset_cont;
2846                 WAIT(reset_fdc);
2847         }
2848         process_fd_request();
2849         return ret;
2850 }
2851 
2852 /*
2853  * Misc Ioctl's and support
2854  * ========================
2855  */
2856 static int fd_copyout(void *param, const void *address, int size)
     /* [previous][next][first][last][top][bottom][index][help] */
2857 {
2858         int ret;
2859 
2860         ECALL(verify_area(VERIFY_WRITE,param,size));
2861         fd_cacheflush(address, size); /* is this necessary ??? */
2862         /* Ralf: Yes; only the l2 cache is completely chipset
2863            controlled */
2864         memcpy_tofs(param,(void *) address, size);
2865         return 0;
2866 }
2867 
2868 static int fd_copyin(void *param, void *address, int size)
     /* [previous][next][first][last][top][bottom][index][help] */
2869 {
2870         int ret;
2871 
2872         ECALL(verify_area(VERIFY_READ,param,size));
2873         memcpy_fromfs((void *) address, param, size);
2874         return 0;
2875 }
2876 
2877 #define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x)))
2878 #define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x)))
2879 
2880 static inline const char *drive_name(int type, int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
2881 {
2882         struct floppy_struct *floppy;
2883 
2884         if (type)
2885                 floppy = floppy_type + type;
2886         else {
2887                 if (UDP->native_format)
2888                         floppy = floppy_type + UDP->native_format;
2889                 else
2890                         return "(null)";
2891         }
2892         if (floppy->name)
2893                 return floppy->name;
2894         else
2895                 return "(null)";
2896 }
2897 
2898 
2899 /* raw commands */
2900 static void raw_cmd_done(int flag)
     /* [previous][next][first][last][top][bottom][index][help] */
2901 {
2902         int i;
2903 
2904         if (!flag) {
2905                 raw_cmd->flags = FD_RAW_FAILURE;
2906                 raw_cmd->flags |= FD_RAW_HARDFAILURE;
2907         } else {
2908                 raw_cmd->reply_count = inr;
2909                 for (i=0; i< raw_cmd->reply_count; i++)
2910                         raw_cmd->reply[i] = reply_buffer[i];
2911 
2912                 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE))
2913                         raw_cmd->length = fd_get_dma_residue();
2914                 
2915                 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) &&
2916                     (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0)))
2917                         raw_cmd->flags |= FD_RAW_FAILURE;
2918 
2919                 if (disk_change(current_drive))
2920                         raw_cmd->flags |= FD_RAW_DISK_CHANGE;
2921                 else
2922                         raw_cmd->flags &= ~FD_RAW_DISK_CHANGE;
2923                 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER)
2924                         motor_off_callback(current_drive);
2925 
2926                 if (raw_cmd->next &&
2927                    (!(raw_cmd->flags & FD_RAW_FAILURE) ||
2928                     !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) &&
2929                    ((raw_cmd->flags & FD_RAW_FAILURE) ||
2930                     !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) {
2931                         raw_cmd = raw_cmd->next;
2932                         return;
2933                 }
2934         }
2935         generic_done(flag);
2936 }
2937 
2938 
2939 static struct cont_t raw_cmd_cont={
2940         success_and_wakeup,
2941         floppy_start,
2942         generic_failure,
2943         raw_cmd_done
2944 };
2945 
2946 static inline int raw_cmd_copyout(int cmd, char *param,
     /* [previous][next][first][last][top][bottom][index][help] */
2947                                   struct floppy_raw_cmd *ptr)
2948 {
2949         struct old_floppy_raw_cmd old_raw_cmd;
2950         int ret;
2951 
2952         while(ptr) {
2953                 if (cmd == OLDFDRAWCMD) {
2954                         old_raw_cmd.flags = ptr->flags;
2955                         old_raw_cmd.data = ptr->data;
2956                         old_raw_cmd.length = ptr->length;
2957                         old_raw_cmd.rate = ptr->rate;
2958                         old_raw_cmd.reply_count = ptr->reply_count;
2959                         memcpy(old_raw_cmd.reply, ptr->reply, 7);
2960                         COPYOUT(old_raw_cmd);
2961                         param += sizeof(old_raw_cmd);
2962                 } else {
2963                         COPYOUT(*ptr);
2964                         param += sizeof(struct floppy_raw_cmd);
2965                 }
2966 
2967                 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){
2968                         if (ptr->length>=0 && ptr->length<=ptr->buffer_length)
2969                                 ECALL(fd_copyout(ptr->data, 
2970                                                  ptr->kernel_data, 
2971                                                  ptr->buffer_length - 
2972                                                  ptr->length));
2973                 }
2974                 ptr = ptr->next;
2975         }
2976         return 0;
2977 }
2978 
2979 
2980 static void raw_cmd_free(struct floppy_raw_cmd **ptr)
     /* [previous][next][first][last][top][bottom][index][help] */
2981 {
2982         struct floppy_raw_cmd *next,*this;
2983 
2984         this = *ptr;
2985         *ptr = 0;
2986         while(this) {
2987                 if (this->buffer_length) {
2988                         fd_dma_mem_free((unsigned long)this->kernel_data,
2989                                         this->buffer_length);
2990                         this->buffer_length = 0;
2991                 }
2992                 next = this->next;
2993                 kfree(this);
2994                 this = next;
2995         }
2996 }
2997 
2998 
2999 static inline int raw_cmd_copyin(int cmd, char *param,
     /* [previous][next][first][last][top][bottom][index][help] */
3000                                  struct floppy_raw_cmd **rcmd)
3001 {
3002         struct floppy_raw_cmd *ptr;
3003         struct old_floppy_raw_cmd old_raw_cmd;
3004         int ret;
3005         int i;
3006         
3007         *rcmd = 0;
3008         while(1) {
3009                 ptr = (struct floppy_raw_cmd *) 
3010                         kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER);
3011                 if (!ptr)
3012                         return -ENOMEM;
3013                 *rcmd = ptr;
3014                 if (cmd == OLDFDRAWCMD){
3015                         COPYIN(old_raw_cmd);
3016                         ptr->flags = old_raw_cmd.flags;
3017                         ptr->data = old_raw_cmd.data;
3018                         ptr->length = old_raw_cmd.length;
3019                         ptr->rate = old_raw_cmd.rate;
3020                         ptr->cmd_count = old_raw_cmd.cmd_count;
3021                         ptr->track = old_raw_cmd.track;
3022                         ptr->phys_length = 0;
3023                         ptr->next = 0;
3024                         ptr->buffer_length = 0;
3025                         memcpy(ptr->cmd, old_raw_cmd.cmd, 9);
3026                         param += sizeof(struct old_floppy_raw_cmd);
3027                         if (ptr->cmd_count > 9)
3028                                 return -EINVAL;
3029                 } else {
3030                         COPYIN(*ptr);
3031                         ptr->next = 0;
3032                         ptr->buffer_length = 0;
3033                         param += sizeof(struct floppy_raw_cmd);
3034                         if (ptr->cmd_count > 33)
3035                                 /* the command may now also take up the space
3036                                  * initially intended for the reply & the
3037                                  * reply count. Needed for long 82078 commands
3038                                  * such as RESTORE, which takes ... 17 command
3039                                  * bytes. Murphy's law #137: When you reserve
3040                                  * 16 bytes for a structure, you'll one day
3041                                  * discover that you really need 17...
3042                                  */
3043                                 return -EINVAL;
3044                 }
3045 
3046                 for (i=0; i< 16; i++)
3047                         ptr->reply[i] = 0;
3048                 ptr->resultcode = 0;
3049                 ptr->kernel_data = 0;
3050 
3051                 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) {
3052                         if (ptr->length <= 0)
3053                                 return -EINVAL;
3054                         ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length);
3055                         if (!ptr->kernel_data)
3056                                 return -ENOMEM;
3057                         ptr->buffer_length = ptr->length;
3058                 }
3059                 if ( ptr->flags & FD_RAW_READ )
3060                     ECALL( verify_area( VERIFY_WRITE, ptr->data, 
3061                                         ptr->length ));
3062                 if (ptr->flags & FD_RAW_WRITE)
3063                         ECALL(fd_copyin(ptr->data, ptr->kernel_data, 
3064                                         ptr->length));
3065                 rcmd = & (ptr->next);
3066                 if (!(ptr->flags & FD_RAW_MORE))
3067                         return 0;
3068                 ptr->rate &= 0x43;
3069         }
3070 }
3071 
3072 
3073 static int raw_cmd_ioctl(int cmd, void *param)
     /* [previous][next][first][last][top][bottom][index][help] */
3074 {
3075         int drive, ret, ret2;
3076         struct floppy_raw_cmd *my_raw_cmd;
3077 
3078         if (FDCS->rawcmd <= 1)
3079                 FDCS->rawcmd = 1;
3080         for (drive= 0; drive < N_DRIVE; drive++){
3081                 if (FDC(drive) != fdc)
3082                         continue;
3083                 if (drive == current_drive){
3084                         if (UDRS->fd_ref > 1){
3085                                 FDCS->rawcmd = 2;
3086                                 break;
3087                         }
3088                 } else if (UDRS->fd_ref){
3089                         FDCS->rawcmd = 2;
3090                         break;
3091                 }
3092         }
3093 
3094         if (FDCS->reset)
3095                 return -EIO;
3096 
3097         ret = raw_cmd_copyin(cmd, param, &my_raw_cmd);
3098         if (ret) {
3099                 raw_cmd_free(&my_raw_cmd);
3100                 return ret;
3101         }
3102 
3103         raw_cmd = my_raw_cmd;
3104         cont = &raw_cmd_cont;
3105         ret=wait_til_done(floppy_start,1);
3106 #ifdef DCL_DEBUG
3107         if (DP->flags & FD_DEBUG){
3108                 DPRINT("calling disk change from raw_cmd ioctl\n");
3109         }
3110 #endif
3111 
3112         if (ret != -EINTR && FDCS->reset)
3113                 ret = -EIO;
3114 
3115         DRS->track = NO_TRACK;
3116 
3117         ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd);
3118         if (!ret)
3119                 ret = ret2;
3120         raw_cmd_free(&my_raw_cmd);
3121         return ret;
3122 }
3123 
3124 static int invalidate_drive(kdev_t rdev)
     /* [previous][next][first][last][top][bottom][index][help] */
3125 {
3126         /* invalidate the buffer track to force a reread */
3127         set_bit(DRIVE(rdev), &fake_change);
3128         process_fd_request();
3129         check_disk_change(rdev);
3130         return 0;
3131 }
3132 
3133 
3134 static inline void clear_write_error(int drive)
     /* [previous][next][first][last][top][bottom][index][help] */
3135 {
3136         CLEARSTRUCT(UDRWE);
3137 }
3138 
3139 static inline int set_geometry(unsigned int cmd, struct floppy_struct *g,
     /* [previous][next][first][last][top][bottom][index][help] */
3140                                int drive, int type, kdev_t device)
3141 {
3142         int cnt;
3143 
3144         /* sanity checking for parameters.*/
3145         if (g->sect <= 0 ||
3146             g->head <= 0 ||
3147             g->track <= 0 ||
3148             g->track > UDP->tracks>>STRETCH(g) ||
3149             /* check if reserved bits are set */
3150             (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0)
3151                 return -EINVAL;
3152         if (type){
3153                 if (!suser())
3154                         return -EPERM;
3155                 LOCK_FDC(drive,1);
3156                 for (cnt = 0; cnt < N_DRIVE; cnt++){
3157                         if (ITYPE(drive_state[cnt].fd_device) == type &&
3158                             drive_state[cnt].fd_ref)
3159                                 set_bit(drive, &fake_change);
3160                 }
3161                 floppy_type[type] = *g;
3162                 floppy_type[type].name="user format";
3163                 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++)
3164                         floppy_sizes[cnt]= floppy_sizes[cnt+0x80]=
3165                                 floppy_type[type].size>>1;
3166                 process_fd_request();
3167                 for (cnt = 0; cnt < N_DRIVE; cnt++){
3168                         if (ITYPE(drive_state[cnt].fd_device) == type &&
3169                             drive_state[cnt].fd_ref)
3170                                 check_disk_change(
3171                                         MKDEV(FLOPPY_MAJOR,
3172                                               drive_state[cnt].fd_device));
3173                 }
3174         } else {
3175                 LOCK_FDC(drive,1);
3176                 if (cmd != FDDEFPRM)
3177                         /* notice a disk change immediately, else
3178                          * we loose our settings immediately*/
3179                         CALL(poll_drive(1,0));
3180                 user_params[drive] = *g;
3181                 if (buffer_drive == drive)
3182                         SUPBOUND(buffer_max, user_params[drive].sect);
3183                 current_type[drive] = &user_params[drive];
3184                 floppy_sizes[drive] = user_params[drive].size >> 1;
3185                 if (cmd == FDDEFPRM)
3186                         DRS->keep_data = -1;
3187                 else
3188                         DRS->keep_data = 1;
3189                 /* invalidation. Invalidate only when needed, i.e.
3190                  * when there are already sectors in the buffer cache
3191                  * whose number will change. This is useful, because
3192                  * mtools often changes the geometry of the disk after
3193                  * looking at the boot block */
3194                 if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack)
3195                         invalidate_drive(device);
3196                 else
3197                         process_fd_request();
3198         }
3199         return 0;
3200 }
3201 
3202 /* handle obsolete ioctl's */
3203 static struct translation_entry {
3204     int newcmd;
3205     int oldcmd;
3206     int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus
3207                   * use numeric values. NO SIZEOFS */
3208 } translation_table[]= {
3209     {FDCLRPRM,           0,  0},
3210     {FDSETPRM,           1, 28},
3211     {FDDEFPRM,           2, 28},
3212     {FDGETPRM,           3, 28},
3213     {FDMSGON,            4,  0},
3214     {FDMSGOFF,           5,  0},
3215     {FDFMTBEG,           6,  0},
3216     {FDFMTTRK,           7, 12},
3217     {FDFMTEND,           8,  0},
3218     {FDSETEMSGTRESH,    10,  0},
3219     {FDFLUSH,           11,  0},
3220     {FDSETMAXERRS,      12, 20},
3221     {OLDFDRAWCMD,       30,  0},
3222     {FDGETMAXERRS,      14, 20},
3223     {FDGETDRVTYP,       16, 16},
3224     {FDSETDRVPRM,       20, 88},
3225     {FDGETDRVPRM,       21, 88},
3226     {FDGETDRVSTAT,      22, 52},
3227     {FDPOLLDRVSTAT,     23, 52},
3228     {FDRESET,           24,  0},
3229     {FDGETFDCSTAT,      25, 40},
3230     {FDWERRORCLR,       27,  0},
3231     {FDWERRORGET,       28, 24},
3232     {FDRAWCMD,           0,  0},
3233     {FDEJECT,            0,  0},
3234     {FDTWADDLE,         40,  0} };
3235 
3236 static inline int normalize_0x02xx_ioctl(int *cmd, int *size)
     /* [previous][next][first][last][top][bottom][index][help] */
3237 {
3238         int i;
3239 
3240         for (i=0; i < ARRAY_SIZE(translation_table); i++) {
3241                 if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){
3242                         *size = _IOC_SIZE(*cmd);
3243                         *cmd = translation_table[i].newcmd;
3244                         if (*size > _IOC_SIZE(*cmd)) {
3245                                 printk("ioctl not yet supported\n");
3246                                 return -EFAULT;
3247                         }
3248                         return 0;
3249                 }
3250         }
3251         return -EINVAL;
3252 }
3253 
3254 static inline int xlate_0x00xx_ioctl(int *cmd, int *size)
     /* [previous][next][first][last][top][bottom][index][help] */
3255 {
3256         int i;
3257         /* old ioctls' for kernels <= 1.3.33 */
3258         /* When the next even release will come around, we'll start
3259          * warning against these.
3260          * When the next odd release will come around, we'll fail with
3261          * -EINVAL */
3262         if(strcmp(system_utsname.version, "1.4.0") >= 0)
3263                 printk("obsolete floppy ioctl %x\n", *cmd);
3264         if((system_utsname.version[0] == '1' &&
3265             strcmp(system_utsname.version, "1.5.0") >= 0) ||
3266            (system_utsname.version[0] >= '2' &&
3267             strcmp(system_utsname.version, "2.1.0") >= 0))
3268                 return -EINVAL;
3269         for (i=0; i < ARRAY_SIZE(translation_table); i++) {
3270                 if (*cmd == translation_table[i].oldcmd) {
3271                         *size = translation_table[i].oldsize;
3272                         *cmd = translation_table[i].newcmd;
3273                         return 0;
3274                 }
3275         }
3276         return -EINVAL;
3277 }
3278 
3279 static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd,
     /* [previous][next][first][last][top][bottom][index][help] */
3280                     unsigned long param)
3281 {
3282 #define IOCTL_MODE_BIT 8
3283 #define OPEN_WRITE_BIT 16
3284 #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT))
3285 #define OUT(c,x) case c: outparam = (const char *) (x); break
3286 #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0
3287 
3288         int i,drive,type;
3289         kdev_t device;
3290         int ret;
3291         int size;
3292         union inparam {
3293                 struct floppy_struct g; /* geometry */
3294                 struct format_descr f;
3295                 struct floppy_max_errors max_errors;
3296                 struct floppy_drive_params dp;
3297         } inparam; /* parameters coming from user space */
3298         const char *outparam; /* parameters passed back to user space */
3299 
3300         device = inode->i_rdev;
3301         switch (cmd) {
3302                 RO_IOCTLS(device,param);
3303         }
3304         type = TYPE(device);
3305         drive = DRIVE(device);
3306 
3307         /* convert compatibility eject ioctls into floppy eject ioctl.
3308          * We do this in order to provide a means to eject floppy disks before
3309          * installing the new fdutils package */
3310         if(cmd == CDROMEJECT || /* CD-ROM eject */
3311            cmd == 0x6470 /* SunOS floppy eject */) {
3312                 DPRINT("obsolete eject ioctl\n");
3313                 DPRINT("please use floppycontrol --eject\n");
3314                 cmd = FDEJECT;
3315         }
3316 
3317         /* convert the old style command into a new style command */
3318         if ((cmd & 0xff00) == 0x0200) {
3319                 ECALL(normalize_0x02xx_ioctl(&cmd, &size));
3320         } else if ((cmd & 0xff00) == 0x0000) {
3321                 ECALL(xlate_0x00xx_ioctl(&cmd, &size));
3322         } else
3323                 return -EINVAL;
3324 
3325         /* permission checks */
3326         if (((cmd & 0x80) && !suser()) ||
3327              ((cmd & 0x40) && !IOCTL_ALLOWED))
3328                 return -EPERM;
3329 
3330         /* verify writability of result, and fail early */
3331         if (_IOC_DIR(cmd) & _IOC_READ)
3332                 ECALL(verify_area(VERIFY_WRITE,(void *) param, size));
3333                 
3334         /* copyin */
3335         CLEARSTRUCT(&inparam);
3336         if (_IOC_DIR(cmd) & _IOC_WRITE)
3337                 ECALL(fd_copyin((void *)param, &inparam, size))
3338 
3339         switch (cmd) {
3340                 case FDEJECT:
3341                         if(UDRS->fd_ref != 1)
3342                                 /* somebody else has this drive open */
3343                                 return -EBUSY;
3344                         LOCK_FDC(drive,1);
3345 
3346                         /* do the actual eject. Fails on
3347                          * non-Sparc architectures */
3348                         ret=fd_eject(UNIT(drive));
3349 
3350                         USETF(FD_DISK_CHANGED);
3351                         USETF(FD_VERIFY);
3352                         process_fd_request();
3353                         return ret;                     
3354                 case FDCLRPRM:
3355                         LOCK_FDC(drive,1);
3356                         current_type[drive] = NULL;
3357                         floppy_sizes[drive] = MAX_DISK_SIZE;
3358                         UDRS->keep_data = 0;
3359                         return invalidate_drive(device);
3360                 case FDSETPRM:
3361                 case FDDEFPRM:
3362                         return set_geometry(cmd, & inparam.g,
3363                                             drive, type, device);
3364                 case FDGETPRM:
3365                         if (type)
3366                                 outparam = (char *) &floppy_type[type];
3367                         else 
3368                                 outparam = (char *) current_type[drive];
3369                         if(!outparam)
3370                                 return -ENODEV;
3371                         break;
3372 
3373                 case FDMSGON:
3374                         UDP->flags |= FTD_MSG;
3375                         return 0;
3376                 case FDMSGOFF:
3377                         UDP->flags &= ~FTD_MSG;
3378                         return 0;
3379 
3380                 case FDFMTBEG:
3381                         LOCK_FDC(drive,1);
3382                         CALL(poll_drive(1, FD_RAW_NEED_DISK));
3383                         ret = UDRS->flags;
3384                         process_fd_request();
3385                         if(ret & FD_VERIFY)
3386                                 return -ENODEV;
3387                         if(!(ret & FD_DISK_WRITABLE))
3388                                 return -EROFS;
3389                         return 0;
3390                 case FDFMTTRK:
3391                         if (UDRS->fd_ref != 1)
3392                                 return -EBUSY;
3393                         return do_format(device, &inparam.f);
3394                 case FDFMTEND:
3395                 case FDFLUSH:
3396                         LOCK_FDC(drive,1);
3397                         return invalidate_drive(device);
3398 
3399                 case FDSETEMSGTRESH:
3400                         UDP->max_errors.reporting =
3401                                 (unsigned short) (param & 0x0f);
3402                         return 0;
3403                 OUT(FDGETMAXERRS, &UDP->max_errors);
3404                 IN(FDSETMAXERRS, &UDP->max_errors, max_errors);
3405 
3406                 case FDGETDRVTYP:
3407                         outparam = drive_name(type,drive);
3408                         SUPBOUND(size,strlen(outparam)+1);
3409                         break;
3410 
3411                 IN(FDSETDRVPRM, UDP, dp);
3412                 OUT(FDGETDRVPRM, UDP);
3413 
3414                 case FDPOLLDRVSTAT:
3415                         LOCK_FDC(drive,1);
3416                         CALL(poll_drive(1, FD_RAW_NEED_DISK));
3417                         process_fd_request();
3418                         /* fall through */
3419                 OUT(FDGETDRVSTAT, UDRS);
3420 
3421                 case FDRESET:
3422                         return user_reset_fdc(drive, (int)param, 1);
3423 
3424                 OUT(FDGETFDCSTAT,UFDCS);
3425 
3426                 case FDWERRORCLR:
3427                         CLEARSTRUCT(UDRWE);
3428                         return 0;
3429                 OUT(FDWERRORGET,UDRWE);
3430 
3431                 case OLDFDRAWCMD:
3432                 case FDRAWCMD:
3433                         if (type)
3434                                 return -EINVAL;
3435                         LOCK_FDC(drive,1);
3436                         set_floppy(device);
3437                         CALL(i = raw_cmd_ioctl(cmd,(void *) param));
3438                         process_fd_request();
3439                         return i;
3440 
3441                 case FDTWADDLE:
3442                         LOCK_FDC(drive,1);
3443                         twaddle();
3444                         process_fd_request();
3445                         return 0;
3446 
3447                 default:
3448                         return -EINVAL;
3449         }
3450 
3451         if (_IOC_DIR(cmd) & _IOC_READ)
3452                 return fd_copyout((void *)param, outparam, size);
3453         else
3454                 return 0;
3455 #undef IOCTL_ALLOWED
3456 #undef OUT
3457 #undef IN
3458 }
3459 
3460 static void config_types(void)
     /* [previous][next][first][last][top][bottom][index][help] */
3461 {
3462         int first=1;
3463         int drive;
3464 
3465         /* read drive info out of physical CMOS */
3466         drive=0;
3467         if (!UDP->cmos)
3468                 UDP->cmos= FLOPPY0_TYPE;
3469         drive=1;
3470         if (!UDP->cmos && FLOPPY1_TYPE)
3471                 UDP->cmos = FLOPPY1_TYPE;
3472 
3473         /* XXX */
3474         /* additional physical CMOS drive detection should go here */
3475 
3476         for (drive=0; drive < N_DRIVE; drive++){
3477                 if (UDP->cmos >= 16)
3478                         UDP->cmos = 0;
3479                 if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params))
3480                         memcpy((char *) UDP,
3481                                (char *) (&default_drive_params[(int)UDP->cmos].params),
3482                                sizeof(struct floppy_drive_params));
3483                 if (UDP->cmos){
3484                         if (first)
3485                                 printk(KERN_INFO "Floppy drive(s): ");
3486                         else
3487                                 printk(", ");
3488                         first=0;
3489                         if (UDP->cmos > 0){
3490                                 allowed_drive_mask |= 1 << drive;
3491                                 printk("fd%d is %s", drive,
3492                                        default_drive_params[(int)UDP->cmos].name);
3493                         } else
3494                                 printk("fd%d is unknown type %d",drive,
3495                                        UDP->cmos);
3496                 }
3497         }
3498         if (!first)
3499                 printk("\n");
3500 }
3501 
3502 static int floppy_read(struct inode * inode, struct file * filp,
     /* [previous][next][first][last][top][bottom][index][help] */
3503                        char * buf, int count)
3504 {
3505         int drive = DRIVE(inode->i_rdev);
3506 
3507         check_disk_change(inode->i_rdev);
3508         if (UTESTF(FD_DISK_CHANGED))
3509                 return -ENXIO;
3510         return block_read(inode, filp, buf, count);
3511 }
3512 
3513 static int floppy_write(struct inode * inode, struct file * filp,
     /* [previous][next][first][last][top][bottom][index][help] */
3514                         const char * buf, int count)
3515 {
3516         int block;
3517         int ret;
3518         int drive = DRIVE(inode->i_rdev);
3519 
3520         if (!UDRS->maxblock)
3521                 UDRS->maxblock=1;/* make change detectable */
3522         check_disk_change(inode->i_rdev);
3523         if (UTESTF(FD_DISK_CHANGED))
3524                 return -ENXIO;
3525         if (!UTESTF(FD_DISK_WRITABLE))
3526                 return -EROFS;
3527         block = (filp->f_pos + count) >> 9;
3528         INFBOUND(UDRS->maxblock, block);
3529         ret= block_write(inode, filp, buf, count);
3530         return ret;
3531 }
3532 
3533 static void floppy_release(struct inode * inode, struct file * filp)
     /* [previous][next][first][last][top][bottom][index][help] */
3534 {
3535         int drive;
3536 
3537         drive = DRIVE(inode->i_rdev);
3538 
3539         if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT)))
3540                 /* if the file is mounted OR (writable now AND writable at
3541                  * open time) Linus: Does this cover all cases? */
3542                 block_fsync(inode,filp);
3543 
3544         if (UDRS->fd_ref < 0)
3545                 UDRS->fd_ref=0;
3546         else if (!UDRS->fd_ref--) {
3547                 DPRINT("floppy_release with fd_ref == 0");
3548                 UDRS->fd_ref = 0;
3549         }
3550         floppy_release_irq_and_dma();
3551 }
3552 
3553 /*
3554  * floppy_open check for aliasing (/dev/fd0 can be the same as
3555  * /dev/PS0 etc), and disallows simultaneous access to the same
3556  * drive with different device numbers.
3557  */
3558 #define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0)
3559 
3560 static int floppy_open(struct inode * inode, struct file * filp)
     /* [previous][next][first][last][top][bottom][index][help] */
3561 {
3562         int drive;
3563         int old_dev;
3564         int try;
3565         char *tmp;
3566 
3567         if (!filp) {
3568                 DPRINT("Weird, open called with filp=0\n");
3569                 return -EIO;
3570         }
3571 
3572         drive = DRIVE(inode->i_rdev);
3573         if (drive >= N_DRIVE ||
3574             !(allowed_drive_mask & (1 << drive)) ||
3575             fdc_state[FDC(drive)].version == FDC_NONE)
3576                 return -ENXIO;
3577 
3578         if (TYPE(inode->i_rdev) >= NUMBER(floppy_type))
3579                 return -ENXIO;
3580         old_dev = UDRS->fd_device;
3581         if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev))
3582                 return -EBUSY;
3583 
3584         if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){
3585                 USETF(FD_DISK_CHANGED);
3586                 USETF(FD_VERIFY);
3587         }
3588 
3589         if (UDRS->fd_ref == -1 ||
3590            (UDRS->fd_ref && (filp->f_flags & O_EXCL)))
3591                 return -EBUSY;
3592 
3593         if (floppy_grab_irq_and_dma())
3594                 return -EBUSY;
3595 
3596         if (filp->f_flags & O_EXCL)
3597                 UDRS->fd_ref = -1;
3598         else
3599                 UDRS->fd_ref++;
3600 
3601         if (!floppy_track_buffer){
3602                 /* if opening an ED drive, reserve a big buffer,
3603                  * else reserve a small one */
3604                 if ((UDP->cmos == 6) || (UDP->cmos == 5))
3605                         try = 64; /* Only 48 actually useful */
3606                 else
3607                         try = 32; /* Only 24 actually useful */
3608 
3609                 tmp=(char *)fd_dma_mem_alloc(1024 * try);
3610                 if (!tmp) {
3611                         try >>= 1; /* buffer only one side */
3612                         INFBOUND(try, 16);
3613                         tmp= (char *)fd_dma_mem_alloc(1024*try);
3614                 }
3615                 if (!tmp) {
3616                         DPRINT("Unable to allocate DMA memory\n");
3617                         RETERR(ENXIO);
3618                 }
3619                 if (floppy_track_buffer)
3620                         fd_dma_mem_free((unsigned long)tmp,try*1024);
3621                 else {
3622                         buffer_min = buffer_max = -1;
3623                         floppy_track_buffer = tmp;
3624                         max_buffer_sectors = try;
3625                 }
3626         }
3627 
3628         UDRS->fd_device = MINOR(inode->i_rdev);
3629         if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) {
3630                 if (buffer_drive == drive)
3631                         buffer_track = -1;
3632                 invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev));
3633         }
3634 
3635         /* Allow ioctls if we have write-permissions even if read-only open */
3636         if ((filp->f_mode & 2) || (permission(inode,2) == 0))
3637                 filp->f_mode |= IOCTL_MODE_BIT;
3638         if (filp->f_mode & 2)
3639                 filp->f_mode |= OPEN_WRITE_BIT;
3640 
3641         if (UFDCS->rawcmd == 1)
3642                 UFDCS->rawcmd = 2;
3643 
3644         if (filp->f_flags & O_NDELAY)
3645                 return 0;
3646         if (filp->f_mode & 3) {
3647                 UDRS->last_checked = 0;
3648                 check_disk_change(inode->i_rdev);
3649                 if (UTESTF(FD_DISK_CHANGED))
3650                         RETERR(ENXIO);
3651         }
3652         if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE)))
3653                 RETERR(EROFS);
3654         return 0;
3655 #undef RETERR
3656 }
3657 
3658 /*
3659  * Check if the disk has been changed or if a change has been faked.
3660  */
3661 static int check_floppy_change(kdev_t dev)
     /* [previous][next][first][last][top][bottom][index][help] */
3662 {
3663         int drive = DRIVE(dev);
3664 
3665         if (MAJOR(dev) != MAJOR_NR) {
3666                 DPRINT("check_floppy_change: not a floppy\n");
3667                 return 0;
3668         }
3669 
3670         if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY))
3671                 return 1;
3672 
3673         if (UDRS->last_checked + UDP->checkfreq < jiffies){
3674                 lock_fdc(drive,0);
3675                 poll_drive(0,0);
3676                 process_fd_request();
3677         }
3678 
3679         if (UTESTF(FD_DISK_CHANGED) ||
3680            UTESTF(FD_VERIFY) ||
3681            test_bit(drive, &fake_change) ||
3682            (!TYPE(dev) && !current_type[drive]))
3683                 return 1;
3684         return 0;
3685 }
3686 
3687 /* revalidate the floppy disk, i.e. trigger format autodetection by reading
3688  * the bootblock (block 0). "Autodetection" is also needed to check whether
3689  * there is a disk in the drive at all... Thus we also do it for fixed
3690  * geometry formats */
3691 static int floppy_revalidate(kdev_t dev)
     /* [previous][next][first][last][top][bottom][index][help] */
3692 {
3693 #define NO_GEOM (!current_type[drive] && !TYPE(dev))
3694         struct buffer_head * bh;
3695         int drive=DRIVE(dev);
3696         int cf;
3697 
3698         if (UTESTF(FD_DISK_CHANGED) ||
3699            UTESTF(FD_VERIFY) ||
3700            test_bit(drive, &fake_change) ||
3701            NO_GEOM){
3702                 lock_fdc(drive,0);
3703                 cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY);
3704                 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){
3705                         process_fd_request(); /*already done by another thread*/
3706                         return 0;
3707                 }
3708                 UDRS->maxblock = 0;
3709                 UDRS->maxtrack = 0;
3710                 if (buffer_drive == drive)
3711                         buffer_track = -1;
3712                 clear_bit(drive, &fake_change);
3713                 UCLEARF(FD_DISK_CHANGED);
3714                 if (cf)
3715                         UDRS->generation++;
3716                 if (NO_GEOM){
3717                         /* auto-sensing */
3718                         int size = floppy_blocksizes[MINOR(dev)];
3719                         if (!size)
3720                                 size = 1024;
3721                         if (!(bh = getblk(dev,0,size))){
3722                                 process_fd_request();
3723                                 return 1;
3724                         }
3725                         if (bh && !buffer_uptodate(bh))
3726                                 ll_rw_block(READ, 1, &bh);
3727                         process_fd_request();
3728                         wait_on_buffer(bh);
3729                         brelse(bh);
3730                         return 0;
3731                 }
3732                 if (cf)
3733                         poll_drive(0, FD_RAW_NEED_DISK);
3734                 process_fd_request();
3735         }
3736         return 0;
3737 }
3738 
3739 static struct file_operations floppy_fops = {
3740         NULL,                   /* lseek - default */
3741         floppy_read,            /* read - general block-dev read */
3742         floppy_write,           /* write - general block-dev write */
3743         NULL,                   /* readdir - bad */
3744         NULL,                   /* select */
3745         fd_ioctl,               /* ioctl */
3746         NULL,                   /* mmap */
3747         floppy_open,            /* open */
3748         floppy_release,         /* release */
3749         block_fsync,            /* fsync */
3750         NULL,                   /* fasync */
3751         check_floppy_change,    /* media_change */
3752         floppy_revalidate,      /* revalidate */
3753 };
3754 
3755 /*
3756  * Floppy Driver initialization
3757  * =============================
3758  */
3759 
3760 /* Determine the floppy disk controller type */
3761 /* This routine was written by David C. Niemi */
3762 static char get_fdc_version(void)
     /* [previous][next][first][last][top][bottom][index][help] */
3763 {
3764         int r;
3765 
3766         output_byte(FD_DUMPREGS);       /* 82072 and better know DUMPREGS */
3767         if (FDCS->reset)
3768                 return FDC_NONE;
3769         if ((r = result()) <= 0x00)
3770                 return FDC_NONE;        /* No FDC present ??? */
3771         if ((r==1) && (reply_buffer[0] == 0x80)){
3772                 printk(KERN_INFO "FDC %d is an 8272A\n",fdc);
3773                 return FDC_8272A;       /* 8272a/765 don't know DUMPREGS */
3774         }
3775         if (r != 10) {
3776                 printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n",
3777                        fdc, r);
3778                 return FDC_UNKNOWN;
3779         }
3780 
3781         if(!fdc_configure()) {
3782                 printk(KERN_INFO "FDC %d is an 82072\n",fdc);
3783                 return FDC_82072;       /* 82072 doesn't know CONFIGURE */
3784         }
3785 
3786         output_byte(FD_PERPENDICULAR);
3787         if(need_more_output() == MORE_OUTPUT) {
3788                 output_byte(0);
3789         } else {
3790                 printk(KERN_INFO "FDC %d is an 82072A\n", fdc);
3791                 return FDC_82072A;      /* 82072A as found on Sparcs. */
3792         }
3793 
3794         output_byte(FD_UNLOCK);
3795         r = result();
3796         if ((r == 1) && (reply_buffer[0] == 0x80)){
3797                 printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc);
3798                 return FDC_82077_ORIG;  /* Pre-1991 82077, doesn't know 
3799                                          * LOCK/UNLOCK */
3800         }
3801         if ((r != 1) || (reply_buffer[0] != 0x00)) {
3802                 printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n",
3803                        fdc, r);
3804                 return FDC_UNKNOWN;
3805         }
3806         output_byte(FD_PARTID);
3807         r = result();
3808         if (r != 1) {
3809                 printk("FDC %d init: PARTID: unexpected return of %d bytes.\n",
3810                        fdc, r);
3811                 return FDC_UNKNOWN;
3812         }
3813         if (reply_buffer[0] == 0x80) {
3814                 printk(KERN_INFO "FDC %d is a post-1991 82077\n",fdc);
3815                 return FDC_82077;       /* Revised 82077AA passes all the tests */
3816         }
3817         switch (reply_buffer[0] >> 5) {
3818                 case 0x0:
3819                         output_byte(FD_SAVE);
3820                         r = result();
3821                         if (r != 16) {
3822                                 printk("FDC %d init: SAVE: unexpected return of %d bytes.\n", fdc, r);
3823                                 return FDC_UNKNOWN;
3824                         }
3825                         if (!(reply_buffer[0] & 0x40)) {
3826                                 printk(KERN_INFO "FDC %d is a 3Volt 82078SL.\n",fdc);
3827                                 return FDC_82078;
3828                         }
3829                         /* Either a 82078-1 or a 82078SL running at 5Volt */
3830                         printk(KERN_INFO "FDC %d is an 82078-1.\n",fdc);
3831                         return FDC_82078_1;
3832                 case 0x1:
3833                         printk(KERN_INFO "FDC %d is a 44pin 82078\n",fdc);
3834                         return FDC_82078;
3835                 case 0x2:
3836                         printk(KERN_INFO "FDC %d is a S82078B\n", fdc);
3837                         return FDC_S82078B;
3838                 case 0x3:
3839                         printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", fdc);
3840                         return FDC_87306;
3841                 default:
3842                         printk(KERN_INFO "FDC %d init: 82078 variant with unknown PARTID=%d.\n",
3843                                fdc, reply_buffer[0] >> 5);
3844                         return FDC_82078_UNKN;
3845         }
3846 } /* get_fdc_version */
3847 
3848 /* lilo configuration */
3849 
3850 /* we make the invert_dcl function global. One day, somebody might
3851  * want to centralize all thinkpad related options into one lilo option,
3852  * there are just so many thinkpad related quirks! */
3853 void floppy_invert_dcl(int *ints,int param)
     /* [previous][next][first][last][top][bottom][index][help] */
3854 {
3855         int i;
3856 
3857         for (i=0; i < ARRAY_SIZE(default_drive_params); i++){
3858                 if (param)
3859                         default_drive_params[i].params.flags |= 0x80;
3860                 else
3861                         default_drive_params[i].params.flags &= ~0x80;
3862         }
3863         DPRINT("Configuring drives for inverted dcl\n");
3864 }
3865 
3866 static void daring(int *ints,int param)
     /* [previous][next][first][last][top][bottom][index][help] */
3867 {
3868         int i;
3869 
3870         for (i=0; i < ARRAY_SIZE(default_drive_params); i++){
3871                 if (param){
3872                         default_drive_params[i].params.select_delay = 0;
3873                         default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR;
3874                 } else {
3875                         default_drive_params[i].params.select_delay = 2*HZ/100;
3876                         default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR;
3877                 }
3878         }
3879         DPRINT1("Assuming %s floppy hardware\n", param ? "standard" : "broken");
3880 }
3881 
3882 static void set_cmos(int *ints, int dummy)
     /* [previous][next][first][last][top][bottom][index][help] */
3883 {
3884         int current_drive=0;
3885 
3886         if (ints[0] != 2){
3887                 DPRINT("wrong number of parameter for cmos\n");
3888                 return;
3889         }
3890         current_drive = ints[1];
3891         if (current_drive < 0 || current_drive >= 8){
3892                 DPRINT("bad drive for set_cmos\n");
3893                 return;
3894         }
3895         if (current_drive >= 4 && !FDC2)
3896                 FDC2 = 0x370;
3897         if (ints[2] <= 0 || 
3898             (ints[2] >= NUMBER(default_drive_params) && ints[2] != 16)){
3899                 DPRINT1("bad cmos code %d\n", ints[2]);
3900                 return;
3901         }
3902         DP->cmos = ints[2];
3903         DPRINT1("setting cmos code to %d\n", ints[2]);
3904 }
3905 
3906 static struct param_table {
3907         const char *name;
3908         void (*fn)(int *ints, int param);
3909         int *var;
3910         int def_param;
3911 } config_params[]={
3912         { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff },
3913         { "all_drives", 0, &allowed_drive_mask, 0xff },
3914         { "asus_pci", 0, &allowed_drive_mask, 0x33 },
3915 
3916         { "daring", daring, 0, 1},
3917 
3918         { "two_fdc",  0, &FDC2, 0x370 },
3919         { "one_fdc", 0, &FDC2, 0 },
3920 
3921         { "thinkpad", floppy_invert_dcl, 0, 1 },
3922 
3923         { "nodma", 0, &use_virtual_dma, 1 },
3924         { "omnibook", 0, &use_virtual_dma, 1 },
3925         { "dma", 0, &use_virtual_dma, 0 },
3926 
3927         { "fifo_depth", 0, &fifo_depth, 0xa },
3928         { "nofifo", 0, &no_fifo, 0x20 },
3929         { "usefifo", 0, &no_fifo, 0 },
3930 
3931         { "cmos", set_cmos, 0, 0 },
3932 
3933         { "unexpected_interrupts", 0, &print_unex, 1 },
3934         { "no_unexpected_interrupts", 0, &print_unex, 0 },
3935         { "L40SX", 0, &print_unex, 0 } };
3936 
3937 #define FLOPPY_SETUP
3938 void floppy_setup(char *str, int *ints)
     /* [previous][next][first][last][top][bottom][index][help] */
3939 {
3940         int i;
3941         int param;
3942         if (str)
3943                 for (i=0; i< ARRAY_SIZE(config_params); i++){
3944                         if (strcmp(str,config_params[i].name) == 0){
3945                                 if (ints[0])
3946                                         param = ints[1];
3947                                 else
3948                                         param = config_params[i].def_param;
3949                                 if(config_params[i].fn)
3950                                         config_params[i].fn(ints,param);
3951                                 if(config_params[i].var) {
3952                                         DPRINT2("%s=%d\n", str, param);
3953                                         *config_params[i].var = param;
3954                                 }
3955                                 return;
3956                         }
3957                 }
3958         if (str) {
3959                 DPRINT1("unknown floppy option [%s]\n", str);
3960                 
3961                 DPRINT("allowed options are:");
3962                 for (i=0; i< ARRAY_SIZE(config_params); i++)
3963                         printk(" %s",config_params[i].name);
3964                 printk("\n");
3965         } else
3966                 DPRINT("botched floppy option\n");
3967         DPRINT("Read linux/drivers/block/README.fd\n");
3968 }
3969 
3970 int floppy_init(void)
     /* [previous][next][first][last][top][bottom][index][help] */
3971 {
3972         int i,unit,drive;
3973         int have_no_fdc= -EIO;
3974 
3975         raw_cmd = 0;
3976 
3977         sti();
3978 
3979         if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) {
3980                 printk("Unable to get major %d for floppy\n",MAJOR_NR);
3981                 return -EBUSY;
3982         }
3983 
3984         for (i=0; i<256; i++)
3985                 if (ITYPE(i))
3986                         floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1;
3987                 else
3988                         floppy_sizes[i] = MAX_DISK_SIZE;
3989 
3990         blk_size[MAJOR_NR] = floppy_sizes;
3991         blksize_size[MAJOR_NR] = floppy_blocksizes;
3992         blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST;
3993         reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT);
3994 #ifdef __sparc__
3995         fdc_cfg = (0x40 | 0x10); /* ImplSeek+Polling+FIFO */
3996 #endif
3997         config_types();
3998 
3999         for (i = 0; i < N_FDC; i++) {
4000                 fdc = i;
4001                 CLEARSTRUCT(FDCS);
4002                 FDCS->dtr = -1;
4003                 FDCS->dor = 0x4;
4004 #ifdef __sparc__
4005                 /*sparcs don't have a DOR reset which we can fall back on to*/
4006                 FDCS->version = FDC_82072A;
4007 #endif
4008         }
4009 
4010         fdc_state[0].address = FDC1;
4011 #if N_FDC > 1
4012         fdc_state[1].address = FDC2;
4013 #endif
4014 
4015         if (floppy_grab_irq_and_dma()){
4016                 unregister_blkdev(MAJOR_NR,"fd");
4017                 return -EBUSY;
4018         }
4019 
4020         /* initialise drive state */
4021         for (drive = 0; drive < N_DRIVE; drive++) {
4022                 CLEARSTRUCT(UDRS);
4023                 CLEARSTRUCT(UDRWE);
4024                 UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED;
4025                 UDRS->fd_device = -1;
4026                 floppy_track_buffer = NULL;
4027                 max_buffer_sectors = 0;
4028         }
4029 
4030         for (i = 0; i < N_FDC; i++) {
4031                 fdc = i;
4032                 FDCS->driver_version = FD_DRIVER_VERSION;
4033                 for (unit=0; unit<4; unit++)
4034                         FDCS->track[unit] = 0;
4035                 if (FDCS->address == -1)
4036                         continue;
4037                 FDCS->rawcmd = 2;
4038                 if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){
4039                         FDCS->address = -1;
4040                         FDCS->version = FDC_NONE;
4041                         continue;
4042                 }
4043                 /* Try to determine the floppy controller type */
4044                 FDCS->version = get_fdc_version();
4045                 if (FDCS->version == FDC_NONE){
4046                         FDCS->address = -1;
4047                         continue;
4048                 }
4049 
4050                 request_region(FDCS->address, 6, "floppy");
4051                 request_region(FDCS->address+7, 1, "floppy DIR");
4052                 /* address + 6 is reserved, and may be taken by IDE.
4053                  * Unfortunately, Adaptec doesn't know this :-(, */
4054 
4055                 have_no_fdc = 0;
4056                 /* Not all FDCs seem to be able to handle the version command
4057                  * properly, so force a reset for the standard FDC clones,
4058                  * to avoid interrupt garbage.
4059                  */
4060                 user_reset_fdc(-1,FD_RESET_ALWAYS,0);
4061         }
4062         fdc=0;
4063         del_timer(&fd_timeout);
4064         current_drive = 0;
4065         floppy_release_irq_and_dma();
4066         initialising=0;
4067         if (have_no_fdc) {
4068                 DPRINT("no floppy controllers found\n");
4069                 unregister_blkdev(MAJOR_NR,"fd");
4070         }
4071         return have_no_fdc;
4072 }
4073 
4074 static int floppy_grab_irq_and_dma(void)
     /* [previous][next][first][last][top][bottom][index][help] */
4075 {
4076         int i;
4077         cli();
4078         if (usage_count++){
4079                 sti();
4080                 return 0;
4081         }
4082         sti();
4083         MOD_INC_USE_COUNT;
4084         for (i=0; i< N_FDC; i++){
4085                 if (FDCS->address != -1){
4086                         fdc = i;
4087                         reset_fdc_info(1);
4088                         fd_outb(FDCS->dor, FD_DOR);
4089                 }
4090         }
4091         set_dor(0, ~0, 8);  /* avoid immediate interrupt */
4092 
4093         if (fd_request_irq()) {
4094                 DPRINT1("Unable to grab IRQ%d for the floppy driver\n",
4095                         FLOPPY_IRQ);
4096                 return -1;
4097         }
4098         if (fd_request_dma()) {
4099                 DPRINT1("Unable to grab DMA%d for the floppy driver\n",
4100                         FLOPPY_DMA);
4101                 fd_free_irq();
4102                 return -1;
4103         }
4104         for (fdc = 0; fdc < N_FDC; fdc++)
4105                 if (FDCS->address != -1)
4106                         fd_outb(FDCS->dor, FD_DOR);
4107         fdc = 0;
4108         fd_enable_irq();
4109         return 0;
4110 }
4111 
4112 static void floppy_release_irq_and_dma(void)
     /* [previous][next][first][last][top][bottom][index][help] */
4113 {
4114 #ifdef FLOPPY_SANITY_CHECK
4115         int drive;
4116 #endif
4117         long tmpsize;
4118         unsigned long tmpaddr;
4119 
4120         cli();
4121         if (--usage_count){
4122                 sti();
4123                 return;
4124         }
4125         sti();
4126         MOD_DEC_USE_COUNT;
4127         fd_disable_dma();
4128         fd_free_dma();
4129         fd_disable_irq();
4130         fd_free_irq();
4131 
4132         set_dor(0, ~0, 8);
4133 #if N_FDC > 1
4134         set_dor(1, ~8, 0);
4135 #endif
4136         floppy_enable_hlt();
4137 
4138         if (floppy_track_buffer && max_buffer_sectors) {
4139                 tmpsize = max_buffer_sectors*1024;
4140                 tmpaddr = (unsigned long)floppy_track_buffer;
4141                 floppy_track_buffer = 0;
4142                 max_buffer_sectors = 0;
4143                 buffer_min = buffer_max = -1;
4144                 fd_dma_mem_free(tmpaddr, tmpsize);
4145         }
4146 
4147 #ifdef FLOPPY_SANITY_CHECK
4148         for (drive=0; drive < N_FDC * 4; drive++)
4149                 if (motor_off_timer[drive].next)
4150                         printk("motor off timer %d still active\n", drive);
4151 
4152         if (fd_timeout.next)
4153                 printk("floppy timer still active:%s\n", timeout_message);
4154         if (fd_timer.next)
4155                 printk("auxiliary floppy timer still active\n");
4156         if (floppy_tq.sync)
4157                 printk("task queue still active\n");
4158 #endif
4159 }
4160 
4161 
4162 #ifdef MODULE
4163 
4164 extern char *get_options(char *str, int *ints);
4165 
4166 char *floppy=NULL;
4167 
4168 static void parse_floppy_cfg_string(char *cfg)
     /* [previous][next][first][last][top][bottom][index][help] */
4169 {
4170         char *ptr;
4171         int ints[11];
4172 
4173         while(*cfg) {
4174                 for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++);
4175                 if(*cfg) {
4176                         *cfg = '\0';
4177                         cfg++;
4178                 }
4179                 if(*ptr)
4180                         floppy_setup(get_options(ptr,ints),ints);
4181         }
4182 }
4183 
4184 static void mod_setup(char *pattern, void (*setup)(char *, int *))
     /* [previous][next][first][last][top][bottom][index][help] */
4185 {
4186         unsigned long i;
4187         char c;
4188         int j;
4189         int match;
4190         char buffer[100];
4191         int ints[11];
4192         int length = strlen(pattern)+1;
4193 
4194         match=0;
4195         j=1;
4196 
4197         for (i=current->mm->env_start; i< current->mm->env_end; i ++){
4198                 c= get_fs_byte(i);
4199                 if (match){
4200                         if (j==99)
4201                                 c='\0';
4202                         buffer[j] = c;
4203                         if (!c || c == ' ' || c == '\t'){
4204                                 if (j){
4205                                         buffer[j] = '\0';
4206                                         setup(get_options(buffer,ints),ints);
4207                                 }
4208                                 j=0;
4209                         } else
4210                                 j++;
4211                         if (!c)
4212                                 break;
4213                         continue;
4214                 }
4215                 if ((!j && !c) || (j && c == pattern[j-1]))
4216                         j++;
4217                 else
4218                         j=0;
4219                 if (j==length){
4220                         match=1;
4221                         j=0;
4222                 }
4223         }
4224 }
4225 
4226 
4227 #ifdef __cplusplus
4228 extern "C" {
4229 #endif
4230 int init_module(void)
     /* [previous][next][first][last][top][bottom][index][help] */
4231 {
4232         printk(KERN_INFO "inserting floppy driver for %s\n", kernel_version);
4233                 
4234         if(floppy)
4235                 parse_floppy_cfg_string(floppy);
4236         else
4237                 mod_setup("floppy=", floppy_setup);
4238                 
4239         return floppy_init();
4240 }
4241 
4242 void cleanup_module(void)
     /* [previous][next][first][last][top][bottom][index][help] */
4243 {
4244         int fdc, dummy;
4245                 
4246         for (fdc=0; fdc<2; fdc++)
4247                 if (FDCS->address != -1){
4248                         release_region(FDCS->address, 6);
4249                         release_region(FDCS->address+7, 1);
4250         }
4251                 
4252         unregister_blkdev(MAJOR_NR, "fd");
4253 
4254         blk_dev[MAJOR_NR].request_fn = 0;
4255         /* eject disk, if any */
4256         dummy = fd_eject(0);
4257 }
4258 
4259 #ifdef __cplusplus
4260 }
4261 #endif
4262 
4263 #else
4264 /* eject the boot floppy (if we need the drive for a different root floppy) */
4265 /* This should only be called at boot time when we're sure that there's no
4266  * resource contention. */
4267 void floppy_eject(void)
     /* [previous][next][first][last][top][bottom][index][help] */
4268 {
4269         int dummy;
4270         floppy_grab_irq_and_dma();
4271         lock_fdc(MAXTIMEOUT,0);
4272         dummy=fd_eject(0);
4273         process_fd_request();
4274         floppy_release_irq_and_dma();
4275 }
4276 #endif
/* [previous][next][first][last][top][bottom][index][help] */