1 /* 2 * linux/drivers/block/floppy.c 3 * 4 * Copyright (C) 1991, 1992 Linus Torvalds 5 * Copyright (C) 1993, 1994 Alain Knaff 6 * Copyright (C) 1998 Alan Cox 7 */ 8 9 /* 10 * 02.12.91 - Changed to static variables to indicate need for reset 11 * and recalibrate. This makes some things easier (output_byte reset 12 * checking etc), and means less interrupt jumping in case of errors, 13 * so the code is hopefully easier to understand. 14 */ 15 16 /* 17 * This file is certainly a mess. I've tried my best to get it working, 18 * but I don't like programming floppies, and I have only one anyway. 19 * Urgel. I should check for more errors, and do more graceful error 20 * recovery. Seems there are problems with several drives. I've tried to 21 * correct them. No promises. 22 */ 23 24 /* 25 * As with hd.c, all routines within this file can (and will) be called 26 * by interrupts, so extreme caution is needed. A hardware interrupt 27 * handler may not sleep, or a kernel panic will happen. Thus I cannot 28 * call "floppy-on" directly, but have to set a special timer interrupt 29 * etc. 30 */ 31 32 /* 33 * 28.02.92 - made track-buffering routines, based on the routines written 34 * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. 35 */ 36 37 /* 38 * Automatic floppy-detection and formatting written by Werner Almesberger 39 * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with 40 * the floppy-change signal detection. 41 */ 42 43 /* 44 * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed 45 * FDC data overrun bug, added some preliminary stuff for vertical 46 * recording support. 47 * 48 * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. 49 * 50 * TODO: Errors are still not counted properly. 51 */ 52 53 /* 1992/9/20 54 * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) 55 * modeled after the freeware MS-DOS program fdformat/88 V1.8 by 56 * Christoph H. Hochst\"atter. 57 * I have fixed the shift values to the ones I always use. Maybe a new 58 * ioctl() should be created to be able to modify them. 59 * There is a bug in the driver that makes it impossible to format a 60 * floppy as the first thing after bootup. 61 */ 62 63 /* 64 * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and 65 * this helped the floppy driver as well. Much cleaner, and still seems to 66 * work. 67 */ 68 69 /* 1994/6/24 --bbroad-- added the floppy table entries and made 70 * minor modifications to allow 2.88 floppies to be run. 71 */ 72 73 /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more 74 * disk types. 75 */ 76 77 /* 78 * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger 79 * format bug fixes, but unfortunately some new bugs too... 80 */ 81 82 /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write 83 * errors to allow safe writing by specialized programs. 84 */ 85 86 /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks 87 * by defining bit 1 of the "stretch" parameter to mean put sectors on the 88 * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's 89 * drives are "upside-down"). 90 */ 91 92 /* 93 * 1995/8/26 -- Andreas Busse -- added Mips support. 94 */ 95 96 /* 97 * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent 98 * features to asm/floppy.h. 99 */ 100 101 /* 102 * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support 103 */ 104 105 /* 106 * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of 107 * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & 108 * use of '0' for NULL. 109 */ 110 111 /* 112 * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation 113 * failures. 114 */ 115 116 /* 117 * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. 118 */ 119 120 /* 121 * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 122 * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were 123 * being used to store jiffies, which are unsigned longs). 124 */ 125 126 /* 127 * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> 128 * - get rid of check_region 129 * - s/suser/capable/ 130 */ 131 132 /* 133 * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no 134 * floppy controller (lingering task on list after module is gone... boom.) 135 */ 136 137 /* 138 * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range 139 * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix 140 * requires many non-obvious changes in arch dependent code. 141 */ 142 143 /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. 144 * Better audit of register_blkdev. 145 */ 146 147 #undef FLOPPY_SILENT_DCL_CLEAR 148 149 #define REALLY_SLOW_IO 150 151 #define DEBUGT 2 152 153 #define DPRINT(format, args...) \ 154 pr_info("floppy%d: " format, current_drive, ##args) 155 156 #define DCL_DEBUG /* debug disk change line */ 157 #ifdef DCL_DEBUG 158 #define debug_dcl(test, fmt, args...) \ 159 do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0) 160 #else 161 #define debug_dcl(test, fmt, args...) \ 162 do { if (0) DPRINT(fmt, ##args); } while (0) 163 #endif 164 165 /* do print messages for unexpected interrupts */ 166 static int print_unex = 1; 167 #include <linux/module.h> 168 #include <linux/sched.h> 169 #include <linux/fs.h> 170 #include <linux/kernel.h> 171 #include <linux/timer.h> 172 #include <linux/workqueue.h> 173 #define FDPATCHES 174 #include <linux/fdreg.h> 175 #include <linux/fd.h> 176 #include <linux/hdreg.h> 177 #include <linux/errno.h> 178 #include <linux/slab.h> 179 #include <linux/mm.h> 180 #include <linux/bio.h> 181 #include <linux/string.h> 182 #include <linux/jiffies.h> 183 #include <linux/fcntl.h> 184 #include <linux/delay.h> 185 #include <linux/mc146818rtc.h> /* CMOS defines */ 186 #include <linux/ioport.h> 187 #include <linux/interrupt.h> 188 #include <linux/init.h> 189 #include <linux/platform_device.h> 190 #include <linux/mod_devicetable.h> 191 #include <linux/mutex.h> 192 #include <linux/io.h> 193 #include <linux/uaccess.h> 194 #include <linux/async.h> 195 196 /* 197 * PS/2 floppies have much slower step rates than regular floppies. 198 * It's been recommended that take about 1/4 of the default speed 199 * in some more extreme cases. 200 */ 201 static DEFINE_MUTEX(floppy_mutex); 202 static int slow_floppy; 203 204 #include <asm/dma.h> 205 #include <asm/irq.h> 206 207 static int FLOPPY_IRQ = 6; 208 static int FLOPPY_DMA = 2; 209 static int can_use_virtual_dma = 2; 210 /* ======= 211 * can use virtual DMA: 212 * 0 = use of virtual DMA disallowed by config 213 * 1 = use of virtual DMA prescribed by config 214 * 2 = no virtual DMA preference configured. By default try hard DMA, 215 * but fall back on virtual DMA when not enough memory available 216 */ 217 218 static int use_virtual_dma; 219 /* ======= 220 * use virtual DMA 221 * 0 using hard DMA 222 * 1 using virtual DMA 223 * This variable is set to virtual when a DMA mem problem arises, and 224 * reset back in floppy_grab_irq_and_dma. 225 * It is not safe to reset it in other circumstances, because the floppy 226 * driver may have several buffers in use at once, and we do currently not 227 * record each buffers capabilities 228 */ 229 230 static DEFINE_SPINLOCK(floppy_lock); 231 232 static unsigned short virtual_dma_port = 0x3f0; 233 irqreturn_t floppy_interrupt(int irq, void *dev_id); 234 static int set_dor(int fdc, char mask, char data); 235 236 #define K_64 0x10000 /* 64KB */ 237 238 /* the following is the mask of allowed drives. By default units 2 and 239 * 3 of both floppy controllers are disabled, because switching on the 240 * motor of these drives causes system hangs on some PCI computers. drive 241 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if 242 * a drive is allowed. 243 * 244 * NOTE: This must come before we include the arch floppy header because 245 * some ports reference this variable from there. -DaveM 246 */ 247 248 static int allowed_drive_mask = 0x33; 249 250 #include <asm/floppy.h> 251 252 static int irqdma_allocated; 253 254 #include <linux/blkdev.h> 255 #include <linux/blkpg.h> 256 #include <linux/cdrom.h> /* for the compatibility eject ioctl */ 257 #include <linux/completion.h> 258 259 static struct request *current_req; 260 static void do_fd_request(struct request_queue *q); 261 static int set_next_request(void); 262 263 #ifndef fd_get_dma_residue 264 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) 265 #endif 266 267 /* Dma Memory related stuff */ 268 269 #ifndef fd_dma_mem_free 270 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) 271 #endif 272 273 #ifndef fd_dma_mem_alloc 274 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) 275 #endif 276 277 static inline void fallback_on_nodma_alloc(char **addr, size_t l) 278 { 279 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA 280 if (*addr) 281 return; /* we have the memory */ 282 if (can_use_virtual_dma != 2) 283 return; /* no fallback allowed */ 284 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); 285 *addr = (char *)nodma_mem_alloc(l); 286 #else 287 return; 288 #endif 289 } 290 291 /* End dma memory related stuff */ 292 293 static unsigned long fake_change; 294 static bool initialized; 295 296 #define ITYPE(x) (((x) >> 2) & 0x1f) 297 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) 298 #define UNIT(x) ((x) & 0x03) /* drive on fdc */ 299 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ 300 /* reverse mapping from unit and fdc to drive */ 301 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) 302 303 #define DP (&drive_params[current_drive]) 304 #define DRS (&drive_state[current_drive]) 305 #define DRWE (&write_errors[current_drive]) 306 #define FDCS (&fdc_state[fdc]) 307 308 #define UDP (&drive_params[drive]) 309 #define UDRS (&drive_state[drive]) 310 #define UDRWE (&write_errors[drive]) 311 #define UFDCS (&fdc_state[FDC(drive)]) 312 313 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) 314 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) 315 316 /* read/write */ 317 #define COMMAND (raw_cmd->cmd[0]) 318 #define DR_SELECT (raw_cmd->cmd[1]) 319 #define TRACK (raw_cmd->cmd[2]) 320 #define HEAD (raw_cmd->cmd[3]) 321 #define SECTOR (raw_cmd->cmd[4]) 322 #define SIZECODE (raw_cmd->cmd[5]) 323 #define SECT_PER_TRACK (raw_cmd->cmd[6]) 324 #define GAP (raw_cmd->cmd[7]) 325 #define SIZECODE2 (raw_cmd->cmd[8]) 326 #define NR_RW 9 327 328 /* format */ 329 #define F_SIZECODE (raw_cmd->cmd[2]) 330 #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) 331 #define F_GAP (raw_cmd->cmd[4]) 332 #define F_FILL (raw_cmd->cmd[5]) 333 #define NR_F 6 334 335 /* 336 * Maximum disk size (in kilobytes). 337 * This default is used whenever the current disk size is unknown. 338 * [Now it is rather a minimum] 339 */ 340 #define MAX_DISK_SIZE 4 /* 3984 */ 341 342 /* 343 * globals used by 'result()' 344 */ 345 #define MAX_REPLIES 16 346 static unsigned char reply_buffer[MAX_REPLIES]; 347 static int inr; /* size of reply buffer, when called from interrupt */ 348 #define ST0 (reply_buffer[0]) 349 #define ST1 (reply_buffer[1]) 350 #define ST2 (reply_buffer[2]) 351 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ 352 #define R_TRACK (reply_buffer[3]) 353 #define R_HEAD (reply_buffer[4]) 354 #define R_SECTOR (reply_buffer[5]) 355 #define R_SIZECODE (reply_buffer[6]) 356 357 #define SEL_DLY (2 * HZ / 100) 358 359 /* 360 * this struct defines the different floppy drive types. 361 */ 362 static struct { 363 struct floppy_drive_params params; 364 const char *name; /* name printed while booting */ 365 } default_drive_params[] = { 366 /* NOTE: the time values in jiffies should be in msec! 367 CMOS drive type 368 | Maximum data rate supported by drive type 369 | | Head load time, msec 370 | | | Head unload time, msec (not used) 371 | | | | Step rate interval, usec 372 | | | | | Time needed for spinup time (jiffies) 373 | | | | | | Timeout for spinning down (jiffies) 374 | | | | | | | Spindown offset (where disk stops) 375 | | | | | | | | Select delay 376 | | | | | | | | | RPS 377 | | | | | | | | | | Max number of tracks 378 | | | | | | | | | | | Interrupt timeout 379 | | | | | | | | | | | | Max nonintlv. sectors 380 | | | | | | | | | | | | | -Max Errors- flags */ 381 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, 382 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, 383 384 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, 385 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ 386 387 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, 388 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ 389 390 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 391 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ 392 393 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 394 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ 395 396 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 397 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ 398 399 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 400 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ 401 /* | --autodetected formats--- | | | 402 * read_track | | Name printed when booting 403 * | Native format 404 * Frequency of disk change checks */ 405 }; 406 407 static struct floppy_drive_params drive_params[N_DRIVE]; 408 static struct floppy_drive_struct drive_state[N_DRIVE]; 409 static struct floppy_write_errors write_errors[N_DRIVE]; 410 static struct timer_list motor_off_timer[N_DRIVE]; 411 static struct gendisk *disks[N_DRIVE]; 412 static struct block_device *opened_bdev[N_DRIVE]; 413 static DEFINE_MUTEX(open_lock); 414 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; 415 static int fdc_queue; 416 417 /* 418 * This struct defines the different floppy types. 419 * 420 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some 421 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' 422 * tells if the disk is in Commodore 1581 format, which means side 0 sectors 423 * are located on side 1 of the disk but with a side 0 ID, and vice-versa. 424 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the 425 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical 426 * side 0 is on physical side 0 (but with the misnamed sector IDs). 427 * 'stretch' should probably be renamed to something more general, like 428 * 'options'. 429 * 430 * Bits 2 through 9 of 'stretch' tell the number of the first sector. 431 * The LSB (bit 2) is flipped. For most disks, the first sector 432 * is 1 (represented by 0x00<<2). For some CP/M and music sampler 433 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). 434 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). 435 * 436 * Other parameters should be self-explanatory (see also setfdprm(8)). 437 */ 438 /* 439 Size 440 | Sectors per track 441 | | Head 442 | | | Tracks 443 | | | | Stretch 444 | | | | | Gap 1 size 445 | | | | | | Data rate, | 0x40 for perp 446 | | | | | | | Spec1 (stepping rate, head unload 447 | | | | | | | | /fmt gap (gap2) */ 448 static struct floppy_struct floppy_type[32] = { 449 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ 450 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ 451 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ 452 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ 453 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ 454 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ 455 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ 456 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ 457 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ 458 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ 459 460 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ 461 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ 462 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ 463 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ 464 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ 465 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ 466 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ 467 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ 468 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ 469 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ 470 471 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ 472 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ 473 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ 474 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ 475 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ 476 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ 477 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ 478 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ 479 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ 480 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ 481 482 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ 483 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ 484 }; 485 486 #define SECTSIZE (_FD_SECTSIZE(*floppy)) 487 488 /* Auto-detection: Disk type used until the next media change occurs. */ 489 static struct floppy_struct *current_type[N_DRIVE]; 490 491 /* 492 * User-provided type information. current_type points to 493 * the respective entry of this array. 494 */ 495 static struct floppy_struct user_params[N_DRIVE]; 496 497 static sector_t floppy_sizes[256]; 498 499 static char floppy_device_name[] = "floppy"; 500 501 /* 502 * The driver is trying to determine the correct media format 503 * while probing is set. rw_interrupt() clears it after a 504 * successful access. 505 */ 506 static int probing; 507 508 /* Synchronization of FDC access. */ 509 #define FD_COMMAND_NONE -1 510 #define FD_COMMAND_ERROR 2 511 #define FD_COMMAND_OKAY 3 512 513 static volatile int command_status = FD_COMMAND_NONE; 514 static unsigned long fdc_busy; 515 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); 516 static DECLARE_WAIT_QUEUE_HEAD(command_done); 517 518 /* Errors during formatting are counted here. */ 519 static int format_errors; 520 521 /* Format request descriptor. */ 522 static struct format_descr format_req; 523 524 /* 525 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps 526 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), 527 * H is head unload time (1=16ms, 2=32ms, etc) 528 */ 529 530 /* 531 * Track buffer 532 * Because these are written to by the DMA controller, they must 533 * not contain a 64k byte boundary crossing, or data will be 534 * corrupted/lost. 535 */ 536 static char *floppy_track_buffer; 537 static int max_buffer_sectors; 538 539 static int *errors; 540 typedef void (*done_f)(int); 541 static const struct cont_t { 542 void (*interrupt)(void); 543 /* this is called after the interrupt of the 544 * main command */ 545 void (*redo)(void); /* this is called to retry the operation */ 546 void (*error)(void); /* this is called to tally an error */ 547 done_f done; /* this is called to say if the operation has 548 * succeeded/failed */ 549 } *cont; 550 551 static void floppy_ready(void); 552 static void floppy_start(void); 553 static void process_fd_request(void); 554 static void recalibrate_floppy(void); 555 static void floppy_shutdown(struct work_struct *); 556 557 static int floppy_request_regions(int); 558 static void floppy_release_regions(int); 559 static int floppy_grab_irq_and_dma(void); 560 static void floppy_release_irq_and_dma(void); 561 562 /* 563 * The "reset" variable should be tested whenever an interrupt is scheduled, 564 * after the commands have been sent. This is to ensure that the driver doesn't 565 * get wedged when the interrupt doesn't come because of a failed command. 566 * reset doesn't need to be tested before sending commands, because 567 * output_byte is automatically disabled when reset is set. 568 */ 569 static void reset_fdc(void); 570 571 /* 572 * These are global variables, as that's the easiest way to give 573 * information to interrupts. They are the data used for the current 574 * request. 575 */ 576 #define NO_TRACK -1 577 #define NEED_1_RECAL -2 578 #define NEED_2_RECAL -3 579 580 static atomic_t usage_count = ATOMIC_INIT(0); 581 582 /* buffer related variables */ 583 static int buffer_track = -1; 584 static int buffer_drive = -1; 585 static int buffer_min = -1; 586 static int buffer_max = -1; 587 588 /* fdc related variables, should end up in a struct */ 589 static struct floppy_fdc_state fdc_state[N_FDC]; 590 static int fdc; /* current fdc */ 591 592 static struct workqueue_struct *floppy_wq; 593 594 static struct floppy_struct *_floppy = floppy_type; 595 static unsigned char current_drive; 596 static long current_count_sectors; 597 static unsigned char fsector_t; /* sector in track */ 598 static unsigned char in_sector_offset; /* offset within physical sector, 599 * expressed in units of 512 bytes */ 600 601 static inline bool drive_no_geom(int drive) 602 { 603 return !current_type[drive] && !ITYPE(UDRS->fd_device); 604 } 605 606 #ifndef fd_eject 607 static inline int fd_eject(int drive) 608 { 609 return -EINVAL; 610 } 611 #endif 612 613 /* 614 * Debugging 615 * ========= 616 */ 617 #ifdef DEBUGT 618 static long unsigned debugtimer; 619 620 static inline void set_debugt(void) 621 { 622 debugtimer = jiffies; 623 } 624 625 static inline void debugt(const char *func, const char *msg) 626 { 627 if (DP->flags & DEBUGT) 628 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); 629 } 630 #else 631 static inline void set_debugt(void) { } 632 static inline void debugt(const char *func, const char *msg) { } 633 #endif /* DEBUGT */ 634 635 636 static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown); 637 static const char *timeout_message; 638 639 static void is_alive(const char *func, const char *message) 640 { 641 /* this routine checks whether the floppy driver is "alive" */ 642 if (test_bit(0, &fdc_busy) && command_status < 2 && 643 !delayed_work_pending(&fd_timeout)) { 644 DPRINT("%s: timeout handler died. %s\n", func, message); 645 } 646 } 647 648 static void (*do_floppy)(void) = NULL; 649 650 #define OLOGSIZE 20 651 652 static void (*lasthandler)(void); 653 static unsigned long interruptjiffies; 654 static unsigned long resultjiffies; 655 static int resultsize; 656 static unsigned long lastredo; 657 658 static struct output_log { 659 unsigned char data; 660 unsigned char status; 661 unsigned long jiffies; 662 } output_log[OLOGSIZE]; 663 664 static int output_log_pos; 665 666 #define current_reqD -1 667 #define MAXTIMEOUT -2 668 669 static void __reschedule_timeout(int drive, const char *message) 670 { 671 unsigned long delay; 672 673 if (drive == current_reqD) 674 drive = current_drive; 675 676 if (drive < 0 || drive >= N_DRIVE) { 677 delay = 20UL * HZ; 678 drive = 0; 679 } else 680 delay = UDP->timeout; 681 682 mod_delayed_work(floppy_wq, &fd_timeout, delay); 683 if (UDP->flags & FD_DEBUG) 684 DPRINT("reschedule timeout %s\n", message); 685 timeout_message = message; 686 } 687 688 static void reschedule_timeout(int drive, const char *message) 689 { 690 unsigned long flags; 691 692 spin_lock_irqsave(&floppy_lock, flags); 693 __reschedule_timeout(drive, message); 694 spin_unlock_irqrestore(&floppy_lock, flags); 695 } 696 697 #define INFBOUND(a, b) (a) = max_t(int, a, b) 698 #define SUPBOUND(a, b) (a) = min_t(int, a, b) 699 700 /* 701 * Bottom half floppy driver. 702 * ========================== 703 * 704 * This part of the file contains the code talking directly to the hardware, 705 * and also the main service loop (seek-configure-spinup-command) 706 */ 707 708 /* 709 * disk change. 710 * This routine is responsible for maintaining the FD_DISK_CHANGE flag, 711 * and the last_checked date. 712 * 713 * last_checked is the date of the last check which showed 'no disk change' 714 * FD_DISK_CHANGE is set under two conditions: 715 * 1. The floppy has been changed after some i/o to that floppy already 716 * took place. 717 * 2. No floppy disk is in the drive. This is done in order to ensure that 718 * requests are quickly flushed in case there is no disk in the drive. It 719 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in 720 * the drive. 721 * 722 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. 723 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on 724 * each seek. If a disk is present, the disk change line should also be 725 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk 726 * change line is set, this means either that no disk is in the drive, or 727 * that it has been removed since the last seek. 728 * 729 * This means that we really have a third possibility too: 730 * The floppy has been changed after the last seek. 731 */ 732 733 static int disk_change(int drive) 734 { 735 int fdc = FDC(drive); 736 737 if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) 738 DPRINT("WARNING disk change called early\n"); 739 if (!(FDCS->dor & (0x10 << UNIT(drive))) || 740 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { 741 DPRINT("probing disk change on unselected drive\n"); 742 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), 743 (unsigned int)FDCS->dor); 744 } 745 746 debug_dcl(UDP->flags, 747 "checking disk change line for drive %d\n", drive); 748 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); 749 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); 750 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); 751 752 if (UDP->flags & FD_BROKEN_DCL) 753 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 754 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { 755 set_bit(FD_VERIFY_BIT, &UDRS->flags); 756 /* verify write protection */ 757 758 if (UDRS->maxblock) /* mark it changed */ 759 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 760 761 /* invalidate its geometry */ 762 if (UDRS->keep_data >= 0) { 763 if ((UDP->flags & FTD_MSG) && 764 current_type[drive] != NULL) 765 DPRINT("Disk type is undefined after disk change\n"); 766 current_type[drive] = NULL; 767 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; 768 } 769 770 return 1; 771 } else { 772 UDRS->last_checked = jiffies; 773 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 774 } 775 return 0; 776 } 777 778 static inline int is_selected(int dor, int unit) 779 { 780 return ((dor & (0x10 << unit)) && (dor & 3) == unit); 781 } 782 783 static bool is_ready_state(int status) 784 { 785 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); 786 return state == STATUS_READY; 787 } 788 789 static int set_dor(int fdc, char mask, char data) 790 { 791 unsigned char unit; 792 unsigned char drive; 793 unsigned char newdor; 794 unsigned char olddor; 795 796 if (FDCS->address == -1) 797 return -1; 798 799 olddor = FDCS->dor; 800 newdor = (olddor & mask) | data; 801 if (newdor != olddor) { 802 unit = olddor & 0x3; 803 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { 804 drive = REVDRIVE(fdc, unit); 805 debug_dcl(UDP->flags, 806 "calling disk change from set_dor\n"); 807 disk_change(drive); 808 } 809 FDCS->dor = newdor; 810 fd_outb(newdor, FD_DOR); 811 812 unit = newdor & 0x3; 813 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { 814 drive = REVDRIVE(fdc, unit); 815 UDRS->select_date = jiffies; 816 } 817 } 818 return olddor; 819 } 820 821 static void twaddle(void) 822 { 823 if (DP->select_delay) 824 return; 825 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); 826 fd_outb(FDCS->dor, FD_DOR); 827 DRS->select_date = jiffies; 828 } 829 830 /* 831 * Reset all driver information about the current fdc. 832 * This is needed after a reset, and after a raw command. 833 */ 834 static void reset_fdc_info(int mode) 835 { 836 int drive; 837 838 FDCS->spec1 = FDCS->spec2 = -1; 839 FDCS->need_configure = 1; 840 FDCS->perp_mode = 1; 841 FDCS->rawcmd = 0; 842 for (drive = 0; drive < N_DRIVE; drive++) 843 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) 844 UDRS->track = NEED_2_RECAL; 845 } 846 847 /* selects the fdc and drive, and enables the fdc's input/dma. */ 848 static void set_fdc(int drive) 849 { 850 if (drive >= 0 && drive < N_DRIVE) { 851 fdc = FDC(drive); 852 current_drive = drive; 853 } 854 if (fdc != 1 && fdc != 0) { 855 pr_info("bad fdc value\n"); 856 return; 857 } 858 set_dor(fdc, ~0, 8); 859 #if N_FDC > 1 860 set_dor(1 - fdc, ~8, 0); 861 #endif 862 if (FDCS->rawcmd == 2) 863 reset_fdc_info(1); 864 if (fd_inb(FD_STATUS) != STATUS_READY) 865 FDCS->reset = 1; 866 } 867 868 /* locks the driver */ 869 static int lock_fdc(int drive) 870 { 871 if (WARN(atomic_read(&usage_count) == 0, 872 "Trying to lock fdc while usage count=0\n")) 873 return -1; 874 875 if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) 876 return -EINTR; 877 878 command_status = FD_COMMAND_NONE; 879 880 reschedule_timeout(drive, "lock fdc"); 881 set_fdc(drive); 882 return 0; 883 } 884 885 /* unlocks the driver */ 886 static void unlock_fdc(void) 887 { 888 if (!test_bit(0, &fdc_busy)) 889 DPRINT("FDC access conflict!\n"); 890 891 raw_cmd = NULL; 892 command_status = FD_COMMAND_NONE; 893 cancel_delayed_work(&fd_timeout); 894 do_floppy = NULL; 895 cont = NULL; 896 clear_bit(0, &fdc_busy); 897 wake_up(&fdc_wait); 898 } 899 900 /* switches the motor off after a given timeout */ 901 static void motor_off_callback(unsigned long nr) 902 { 903 unsigned char mask = ~(0x10 << UNIT(nr)); 904 905 set_dor(FDC(nr), mask, 0); 906 } 907 908 /* schedules motor off */ 909 static void floppy_off(unsigned int drive) 910 { 911 unsigned long volatile delta; 912 int fdc = FDC(drive); 913 914 if (!(FDCS->dor & (0x10 << UNIT(drive)))) 915 return; 916 917 del_timer(motor_off_timer + drive); 918 919 /* make spindle stop in a position which minimizes spinup time 920 * next time */ 921 if (UDP->rps) { 922 delta = jiffies - UDRS->first_read_date + HZ - 923 UDP->spindown_offset; 924 delta = ((delta * UDP->rps) % HZ) / UDP->rps; 925 motor_off_timer[drive].expires = 926 jiffies + UDP->spindown - delta; 927 } 928 add_timer(motor_off_timer + drive); 929 } 930 931 /* 932 * cycle through all N_DRIVE floppy drives, for disk change testing. 933 * stopping at current drive. This is done before any long operation, to 934 * be sure to have up to date disk change information. 935 */ 936 static void scandrives(void) 937 { 938 int i; 939 int drive; 940 int saved_drive; 941 942 if (DP->select_delay) 943 return; 944 945 saved_drive = current_drive; 946 for (i = 0; i < N_DRIVE; i++) { 947 drive = (saved_drive + i + 1) % N_DRIVE; 948 if (UDRS->fd_ref == 0 || UDP->select_delay != 0) 949 continue; /* skip closed drives */ 950 set_fdc(drive); 951 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & 952 (0x10 << UNIT(drive)))) 953 /* switch the motor off again, if it was off to 954 * begin with */ 955 set_dor(fdc, ~(0x10 << UNIT(drive)), 0); 956 } 957 set_fdc(saved_drive); 958 } 959 960 static void empty(void) 961 { 962 } 963 964 static void (*floppy_work_fn)(void); 965 966 static void floppy_work_workfn(struct work_struct *work) 967 { 968 floppy_work_fn(); 969 } 970 971 static DECLARE_WORK(floppy_work, floppy_work_workfn); 972 973 static void schedule_bh(void (*handler)(void)) 974 { 975 WARN_ON(work_pending(&floppy_work)); 976 977 floppy_work_fn = handler; 978 queue_work(floppy_wq, &floppy_work); 979 } 980 981 static void (*fd_timer_fn)(void) = NULL; 982 983 static void fd_timer_workfn(struct work_struct *work) 984 { 985 fd_timer_fn(); 986 } 987 988 static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn); 989 990 static void cancel_activity(void) 991 { 992 do_floppy = NULL; 993 cancel_delayed_work_sync(&fd_timer); 994 cancel_work_sync(&floppy_work); 995 } 996 997 /* this function makes sure that the disk stays in the drive during the 998 * transfer */ 999 static void fd_watchdog(void) 1000 { 1001 debug_dcl(DP->flags, "calling disk change from watchdog\n"); 1002 1003 if (disk_change(current_drive)) { 1004 DPRINT("disk removed during i/o\n"); 1005 cancel_activity(); 1006 cont->done(0); 1007 reset_fdc(); 1008 } else { 1009 cancel_delayed_work(&fd_timer); 1010 fd_timer_fn = fd_watchdog; 1011 queue_delayed_work(floppy_wq, &fd_timer, HZ / 10); 1012 } 1013 } 1014 1015 static void main_command_interrupt(void) 1016 { 1017 cancel_delayed_work(&fd_timer); 1018 cont->interrupt(); 1019 } 1020 1021 /* waits for a delay (spinup or select) to pass */ 1022 static int fd_wait_for_completion(unsigned long expires, 1023 void (*function)(void)) 1024 { 1025 if (FDCS->reset) { 1026 reset_fdc(); /* do the reset during sleep to win time 1027 * if we don't need to sleep, it's a good 1028 * occasion anyways */ 1029 return 1; 1030 } 1031 1032 if (time_before(jiffies, expires)) { 1033 cancel_delayed_work(&fd_timer); 1034 fd_timer_fn = function; 1035 queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies); 1036 return 1; 1037 } 1038 return 0; 1039 } 1040 1041 static void setup_DMA(void) 1042 { 1043 unsigned long f; 1044 1045 if (raw_cmd->length == 0) { 1046 int i; 1047 1048 pr_info("zero dma transfer size:"); 1049 for (i = 0; i < raw_cmd->cmd_count; i++) 1050 pr_cont("%x,", raw_cmd->cmd[i]); 1051 pr_cont("\n"); 1052 cont->done(0); 1053 FDCS->reset = 1; 1054 return; 1055 } 1056 if (((unsigned long)raw_cmd->kernel_data) % 512) { 1057 pr_info("non aligned address: %p\n", raw_cmd->kernel_data); 1058 cont->done(0); 1059 FDCS->reset = 1; 1060 return; 1061 } 1062 f = claim_dma_lock(); 1063 fd_disable_dma(); 1064 #ifdef fd_dma_setup 1065 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, 1066 (raw_cmd->flags & FD_RAW_READ) ? 1067 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { 1068 release_dma_lock(f); 1069 cont->done(0); 1070 FDCS->reset = 1; 1071 return; 1072 } 1073 release_dma_lock(f); 1074 #else 1075 fd_clear_dma_ff(); 1076 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); 1077 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? 1078 DMA_MODE_READ : DMA_MODE_WRITE); 1079 fd_set_dma_addr(raw_cmd->kernel_data); 1080 fd_set_dma_count(raw_cmd->length); 1081 virtual_dma_port = FDCS->address; 1082 fd_enable_dma(); 1083 release_dma_lock(f); 1084 #endif 1085 } 1086 1087 static void show_floppy(void); 1088 1089 /* waits until the fdc becomes ready */ 1090 static int wait_til_ready(void) 1091 { 1092 int status; 1093 int counter; 1094 1095 if (FDCS->reset) 1096 return -1; 1097 for (counter = 0; counter < 10000; counter++) { 1098 status = fd_inb(FD_STATUS); 1099 if (status & STATUS_READY) 1100 return status; 1101 } 1102 if (initialized) { 1103 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); 1104 show_floppy(); 1105 } 1106 FDCS->reset = 1; 1107 return -1; 1108 } 1109 1110 /* sends a command byte to the fdc */ 1111 static int output_byte(char byte) 1112 { 1113 int status = wait_til_ready(); 1114 1115 if (status < 0) 1116 return -1; 1117 1118 if (is_ready_state(status)) { 1119 fd_outb(byte, FD_DATA); 1120 output_log[output_log_pos].data = byte; 1121 output_log[output_log_pos].status = status; 1122 output_log[output_log_pos].jiffies = jiffies; 1123 output_log_pos = (output_log_pos + 1) % OLOGSIZE; 1124 return 0; 1125 } 1126 FDCS->reset = 1; 1127 if (initialized) { 1128 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", 1129 byte, fdc, status); 1130 show_floppy(); 1131 } 1132 return -1; 1133 } 1134 1135 /* gets the response from the fdc */ 1136 static int result(void) 1137 { 1138 int i; 1139 int status = 0; 1140 1141 for (i = 0; i < MAX_REPLIES; i++) { 1142 status = wait_til_ready(); 1143 if (status < 0) 1144 break; 1145 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; 1146 if ((status & ~STATUS_BUSY) == STATUS_READY) { 1147 resultjiffies = jiffies; 1148 resultsize = i; 1149 return i; 1150 } 1151 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) 1152 reply_buffer[i] = fd_inb(FD_DATA); 1153 else 1154 break; 1155 } 1156 if (initialized) { 1157 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", 1158 fdc, status, i); 1159 show_floppy(); 1160 } 1161 FDCS->reset = 1; 1162 return -1; 1163 } 1164 1165 #define MORE_OUTPUT -2 1166 /* does the fdc need more output? */ 1167 static int need_more_output(void) 1168 { 1169 int status = wait_til_ready(); 1170 1171 if (status < 0) 1172 return -1; 1173 1174 if (is_ready_state(status)) 1175 return MORE_OUTPUT; 1176 1177 return result(); 1178 } 1179 1180 /* Set perpendicular mode as required, based on data rate, if supported. 1181 * 82077 Now tested. 1Mbps data rate only possible with 82077-1. 1182 */ 1183 static void perpendicular_mode(void) 1184 { 1185 unsigned char perp_mode; 1186 1187 if (raw_cmd->rate & 0x40) { 1188 switch (raw_cmd->rate & 3) { 1189 case 0: 1190 perp_mode = 2; 1191 break; 1192 case 3: 1193 perp_mode = 3; 1194 break; 1195 default: 1196 DPRINT("Invalid data rate for perpendicular mode!\n"); 1197 cont->done(0); 1198 FDCS->reset = 1; 1199 /* 1200 * convenient way to return to 1201 * redo without too much hassle 1202 * (deep stack et al.) 1203 */ 1204 return; 1205 } 1206 } else 1207 perp_mode = 0; 1208 1209 if (FDCS->perp_mode == perp_mode) 1210 return; 1211 if (FDCS->version >= FDC_82077_ORIG) { 1212 output_byte(FD_PERPENDICULAR); 1213 output_byte(perp_mode); 1214 FDCS->perp_mode = perp_mode; 1215 } else if (perp_mode) { 1216 DPRINT("perpendicular mode not supported by this FDC.\n"); 1217 } 1218 } /* perpendicular_mode */ 1219 1220 static int fifo_depth = 0xa; 1221 static int no_fifo; 1222 1223 static int fdc_configure(void) 1224 { 1225 /* Turn on FIFO */ 1226 output_byte(FD_CONFIGURE); 1227 if (need_more_output() != MORE_OUTPUT) 1228 return 0; 1229 output_byte(0); 1230 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); 1231 output_byte(0); /* pre-compensation from track 1232 0 upwards */ 1233 return 1; 1234 } 1235 1236 #define NOMINAL_DTR 500 1237 1238 /* Issue a "SPECIFY" command to set the step rate time, head unload time, 1239 * head load time, and DMA disable flag to values needed by floppy. 1240 * 1241 * The value "dtr" is the data transfer rate in Kbps. It is needed 1242 * to account for the data rate-based scaling done by the 82072 and 82077 1243 * FDC types. This parameter is ignored for other types of FDCs (i.e. 1244 * 8272a). 1245 * 1246 * Note that changing the data transfer rate has a (probably deleterious) 1247 * effect on the parameters subject to scaling for 82072/82077 FDCs, so 1248 * fdc_specify is called again after each data transfer rate 1249 * change. 1250 * 1251 * srt: 1000 to 16000 in microseconds 1252 * hut: 16 to 240 milliseconds 1253 * hlt: 2 to 254 milliseconds 1254 * 1255 * These values are rounded up to the next highest available delay time. 1256 */ 1257 static void fdc_specify(void) 1258 { 1259 unsigned char spec1; 1260 unsigned char spec2; 1261 unsigned long srt; 1262 unsigned long hlt; 1263 unsigned long hut; 1264 unsigned long dtr = NOMINAL_DTR; 1265 unsigned long scale_dtr = NOMINAL_DTR; 1266 int hlt_max_code = 0x7f; 1267 int hut_max_code = 0xf; 1268 1269 if (FDCS->need_configure && FDCS->version >= FDC_82072A) { 1270 fdc_configure(); 1271 FDCS->need_configure = 0; 1272 } 1273 1274 switch (raw_cmd->rate & 0x03) { 1275 case 3: 1276 dtr = 1000; 1277 break; 1278 case 1: 1279 dtr = 300; 1280 if (FDCS->version >= FDC_82078) { 1281 /* chose the default rate table, not the one 1282 * where 1 = 2 Mbps */ 1283 output_byte(FD_DRIVESPEC); 1284 if (need_more_output() == MORE_OUTPUT) { 1285 output_byte(UNIT(current_drive)); 1286 output_byte(0xc0); 1287 } 1288 } 1289 break; 1290 case 2: 1291 dtr = 250; 1292 break; 1293 } 1294 1295 if (FDCS->version >= FDC_82072) { 1296 scale_dtr = dtr; 1297 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ 1298 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ 1299 } 1300 1301 /* Convert step rate from microseconds to milliseconds and 4 bits */ 1302 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); 1303 if (slow_floppy) 1304 srt = srt / 4; 1305 1306 SUPBOUND(srt, 0xf); 1307 INFBOUND(srt, 0); 1308 1309 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); 1310 if (hlt < 0x01) 1311 hlt = 0x01; 1312 else if (hlt > 0x7f) 1313 hlt = hlt_max_code; 1314 1315 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); 1316 if (hut < 0x1) 1317 hut = 0x1; 1318 else if (hut > 0xf) 1319 hut = hut_max_code; 1320 1321 spec1 = (srt << 4) | hut; 1322 spec2 = (hlt << 1) | (use_virtual_dma & 1); 1323 1324 /* If these parameters did not change, just return with success */ 1325 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { 1326 /* Go ahead and set spec1 and spec2 */ 1327 output_byte(FD_SPECIFY); 1328 output_byte(FDCS->spec1 = spec1); 1329 output_byte(FDCS->spec2 = spec2); 1330 } 1331 } /* fdc_specify */ 1332 1333 /* Set the FDC's data transfer rate on behalf of the specified drive. 1334 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue 1335 * of the specify command (i.e. using the fdc_specify function). 1336 */ 1337 static int fdc_dtr(void) 1338 { 1339 /* If data rate not already set to desired value, set it. */ 1340 if ((raw_cmd->rate & 3) == FDCS->dtr) 1341 return 0; 1342 1343 /* Set dtr */ 1344 fd_outb(raw_cmd->rate & 3, FD_DCR); 1345 1346 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) 1347 * need a stabilization period of several milliseconds to be 1348 * enforced after data rate changes before R/W operations. 1349 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) 1350 */ 1351 FDCS->dtr = raw_cmd->rate & 3; 1352 return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready); 1353 } /* fdc_dtr */ 1354 1355 static void tell_sector(void) 1356 { 1357 pr_cont(": track %d, head %d, sector %d, size %d", 1358 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); 1359 } /* tell_sector */ 1360 1361 static void print_errors(void) 1362 { 1363 DPRINT(""); 1364 if (ST0 & ST0_ECE) { 1365 pr_cont("Recalibrate failed!"); 1366 } else if (ST2 & ST2_CRC) { 1367 pr_cont("data CRC error"); 1368 tell_sector(); 1369 } else if (ST1 & ST1_CRC) { 1370 pr_cont("CRC error"); 1371 tell_sector(); 1372 } else if ((ST1 & (ST1_MAM | ST1_ND)) || 1373 (ST2 & ST2_MAM)) { 1374 if (!probing) { 1375 pr_cont("sector not found"); 1376 tell_sector(); 1377 } else 1378 pr_cont("probe failed..."); 1379 } else if (ST2 & ST2_WC) { /* seek error */ 1380 pr_cont("wrong cylinder"); 1381 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ 1382 pr_cont("bad cylinder"); 1383 } else { 1384 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", 1385 ST0, ST1, ST2); 1386 tell_sector(); 1387 } 1388 pr_cont("\n"); 1389 } 1390 1391 /* 1392 * OK, this error interpreting routine is called after a 1393 * DMA read/write has succeeded 1394 * or failed, so we check the results, and copy any buffers. 1395 * hhb: Added better error reporting. 1396 * ak: Made this into a separate routine. 1397 */ 1398 static int interpret_errors(void) 1399 { 1400 char bad; 1401 1402 if (inr != 7) { 1403 DPRINT("-- FDC reply error\n"); 1404 FDCS->reset = 1; 1405 return 1; 1406 } 1407 1408 /* check IC to find cause of interrupt */ 1409 switch (ST0 & ST0_INTR) { 1410 case 0x40: /* error occurred during command execution */ 1411 if (ST1 & ST1_EOC) 1412 return 0; /* occurs with pseudo-DMA */ 1413 bad = 1; 1414 if (ST1 & ST1_WP) { 1415 DPRINT("Drive is write protected\n"); 1416 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1417 cont->done(0); 1418 bad = 2; 1419 } else if (ST1 & ST1_ND) { 1420 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1421 } else if (ST1 & ST1_OR) { 1422 if (DP->flags & FTD_MSG) 1423 DPRINT("Over/Underrun - retrying\n"); 1424 bad = 0; 1425 } else if (*errors >= DP->max_errors.reporting) { 1426 print_errors(); 1427 } 1428 if (ST2 & ST2_WC || ST2 & ST2_BC) 1429 /* wrong cylinder => recal */ 1430 DRS->track = NEED_2_RECAL; 1431 return bad; 1432 case 0x80: /* invalid command given */ 1433 DPRINT("Invalid FDC command given!\n"); 1434 cont->done(0); 1435 return 2; 1436 case 0xc0: 1437 DPRINT("Abnormal termination caused by polling\n"); 1438 cont->error(); 1439 return 2; 1440 default: /* (0) Normal command termination */ 1441 return 0; 1442 } 1443 } 1444 1445 /* 1446 * This routine is called when everything should be correctly set up 1447 * for the transfer (i.e. floppy motor is on, the correct floppy is 1448 * selected, and the head is sitting on the right track). 1449 */ 1450 static void setup_rw_floppy(void) 1451 { 1452 int i; 1453 int r; 1454 int flags; 1455 int dflags; 1456 unsigned long ready_date; 1457 void (*function)(void); 1458 1459 flags = raw_cmd->flags; 1460 if (flags & (FD_RAW_READ | FD_RAW_WRITE)) 1461 flags |= FD_RAW_INTR; 1462 1463 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { 1464 ready_date = DRS->spinup_date + DP->spinup; 1465 /* If spinup will take a long time, rerun scandrives 1466 * again just before spinup completion. Beware that 1467 * after scandrives, we must again wait for selection. 1468 */ 1469 if (time_after(ready_date, jiffies + DP->select_delay)) { 1470 ready_date -= DP->select_delay; 1471 function = floppy_start; 1472 } else 1473 function = setup_rw_floppy; 1474 1475 /* wait until the floppy is spinning fast enough */ 1476 if (fd_wait_for_completion(ready_date, function)) 1477 return; 1478 } 1479 dflags = DRS->flags; 1480 1481 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) 1482 setup_DMA(); 1483 1484 if (flags & FD_RAW_INTR) 1485 do_floppy = main_command_interrupt; 1486 1487 r = 0; 1488 for (i = 0; i < raw_cmd->cmd_count; i++) 1489 r |= output_byte(raw_cmd->cmd[i]); 1490 1491 debugt(__func__, "rw_command"); 1492 1493 if (r) { 1494 cont->error(); 1495 reset_fdc(); 1496 return; 1497 } 1498 1499 if (!(flags & FD_RAW_INTR)) { 1500 inr = result(); 1501 cont->interrupt(); 1502 } else if (flags & FD_RAW_NEED_DISK) 1503 fd_watchdog(); 1504 } 1505 1506 static int blind_seek; 1507 1508 /* 1509 * This is the routine called after every seek (or recalibrate) interrupt 1510 * from the floppy controller. 1511 */ 1512 static void seek_interrupt(void) 1513 { 1514 debugt(__func__, ""); 1515 if (inr != 2 || (ST0 & 0xF8) != 0x20) { 1516 DPRINT("seek failed\n"); 1517 DRS->track = NEED_2_RECAL; 1518 cont->error(); 1519 cont->redo(); 1520 return; 1521 } 1522 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { 1523 debug_dcl(DP->flags, 1524 "clearing NEWCHANGE flag because of effective seek\n"); 1525 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); 1526 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1527 /* effective seek */ 1528 DRS->select_date = jiffies; 1529 } 1530 DRS->track = ST1; 1531 floppy_ready(); 1532 } 1533 1534 static void check_wp(void) 1535 { 1536 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { 1537 /* check write protection */ 1538 output_byte(FD_GETSTATUS); 1539 output_byte(UNIT(current_drive)); 1540 if (result() != 1) { 1541 FDCS->reset = 1; 1542 return; 1543 } 1544 clear_bit(FD_VERIFY_BIT, &DRS->flags); 1545 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1546 debug_dcl(DP->flags, 1547 "checking whether disk is write protected\n"); 1548 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); 1549 if (!(ST3 & 0x40)) 1550 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1551 else 1552 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1553 } 1554 } 1555 1556 static void seek_floppy(void) 1557 { 1558 int track; 1559 1560 blind_seek = 0; 1561 1562 debug_dcl(DP->flags, "calling disk change from %s\n", __func__); 1563 1564 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1565 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { 1566 /* the media changed flag should be cleared after the seek. 1567 * If it isn't, this means that there is really no disk in 1568 * the drive. 1569 */ 1570 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); 1571 cont->done(0); 1572 cont->redo(); 1573 return; 1574 } 1575 if (DRS->track <= NEED_1_RECAL) { 1576 recalibrate_floppy(); 1577 return; 1578 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1579 (raw_cmd->flags & FD_RAW_NEED_DISK) && 1580 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { 1581 /* we seek to clear the media-changed condition. Does anybody 1582 * know a more elegant way, which works on all drives? */ 1583 if (raw_cmd->track) 1584 track = raw_cmd->track - 1; 1585 else { 1586 if (DP->flags & FD_SILENT_DCL_CLEAR) { 1587 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); 1588 blind_seek = 1; 1589 raw_cmd->flags |= FD_RAW_NEED_SEEK; 1590 } 1591 track = 1; 1592 } 1593 } else { 1594 check_wp(); 1595 if (raw_cmd->track != DRS->track && 1596 (raw_cmd->flags & FD_RAW_NEED_SEEK)) 1597 track = raw_cmd->track; 1598 else { 1599 setup_rw_floppy(); 1600 return; 1601 } 1602 } 1603 1604 do_floppy = seek_interrupt; 1605 output_byte(FD_SEEK); 1606 output_byte(UNIT(current_drive)); 1607 if (output_byte(track) < 0) { 1608 reset_fdc(); 1609 return; 1610 } 1611 debugt(__func__, ""); 1612 } 1613 1614 static void recal_interrupt(void) 1615 { 1616 debugt(__func__, ""); 1617 if (inr != 2) 1618 FDCS->reset = 1; 1619 else if (ST0 & ST0_ECE) { 1620 switch (DRS->track) { 1621 case NEED_1_RECAL: 1622 debugt(__func__, "need 1 recal"); 1623 /* after a second recalibrate, we still haven't 1624 * reached track 0. Probably no drive. Raise an 1625 * error, as failing immediately might upset 1626 * computers possessed by the Devil :-) */ 1627 cont->error(); 1628 cont->redo(); 1629 return; 1630 case NEED_2_RECAL: 1631 debugt(__func__, "need 2 recal"); 1632 /* If we already did a recalibrate, 1633 * and we are not at track 0, this 1634 * means we have moved. (The only way 1635 * not to move at recalibration is to 1636 * be already at track 0.) Clear the 1637 * new change flag */ 1638 debug_dcl(DP->flags, 1639 "clearing NEWCHANGE flag because of second recalibrate\n"); 1640 1641 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1642 DRS->select_date = jiffies; 1643 /* fall through */ 1644 default: 1645 debugt(__func__, "default"); 1646 /* Recalibrate moves the head by at 1647 * most 80 steps. If after one 1648 * recalibrate we don't have reached 1649 * track 0, this might mean that we 1650 * started beyond track 80. Try 1651 * again. */ 1652 DRS->track = NEED_1_RECAL; 1653 break; 1654 } 1655 } else 1656 DRS->track = ST1; 1657 floppy_ready(); 1658 } 1659 1660 static void print_result(char *message, int inr) 1661 { 1662 int i; 1663 1664 DPRINT("%s ", message); 1665 if (inr >= 0) 1666 for (i = 0; i < inr; i++) 1667 pr_cont("repl[%d]=%x ", i, reply_buffer[i]); 1668 pr_cont("\n"); 1669 } 1670 1671 /* interrupt handler. Note that this can be called externally on the Sparc */ 1672 irqreturn_t floppy_interrupt(int irq, void *dev_id) 1673 { 1674 int do_print; 1675 unsigned long f; 1676 void (*handler)(void) = do_floppy; 1677 1678 lasthandler = handler; 1679 interruptjiffies = jiffies; 1680 1681 f = claim_dma_lock(); 1682 fd_disable_dma(); 1683 release_dma_lock(f); 1684 1685 do_floppy = NULL; 1686 if (fdc >= N_FDC || FDCS->address == -1) { 1687 /* we don't even know which FDC is the culprit */ 1688 pr_info("DOR0=%x\n", fdc_state[0].dor); 1689 pr_info("floppy interrupt on bizarre fdc %d\n", fdc); 1690 pr_info("handler=%pf\n", handler); 1691 is_alive(__func__, "bizarre fdc"); 1692 return IRQ_NONE; 1693 } 1694 1695 FDCS->reset = 0; 1696 /* We have to clear the reset flag here, because apparently on boxes 1697 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to 1698 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the 1699 * emission of the SENSEI's. 1700 * It is OK to emit floppy commands because we are in an interrupt 1701 * handler here, and thus we have to fear no interference of other 1702 * activity. 1703 */ 1704 1705 do_print = !handler && print_unex && initialized; 1706 1707 inr = result(); 1708 if (do_print) 1709 print_result("unexpected interrupt", inr); 1710 if (inr == 0) { 1711 int max_sensei = 4; 1712 do { 1713 output_byte(FD_SENSEI); 1714 inr = result(); 1715 if (do_print) 1716 print_result("sensei", inr); 1717 max_sensei--; 1718 } while ((ST0 & 0x83) != UNIT(current_drive) && 1719 inr == 2 && max_sensei); 1720 } 1721 if (!handler) { 1722 FDCS->reset = 1; 1723 return IRQ_NONE; 1724 } 1725 schedule_bh(handler); 1726 is_alive(__func__, "normal interrupt end"); 1727 1728 /* FIXME! Was it really for us? */ 1729 return IRQ_HANDLED; 1730 } 1731 1732 static void recalibrate_floppy(void) 1733 { 1734 debugt(__func__, ""); 1735 do_floppy = recal_interrupt; 1736 output_byte(FD_RECALIBRATE); 1737 if (output_byte(UNIT(current_drive)) < 0) 1738 reset_fdc(); 1739 } 1740 1741 /* 1742 * Must do 4 FD_SENSEIs after reset because of ``drive polling''. 1743 */ 1744 static void reset_interrupt(void) 1745 { 1746 debugt(__func__, ""); 1747 result(); /* get the status ready for set_fdc */ 1748 if (FDCS->reset) { 1749 pr_info("reset set in interrupt, calling %pf\n", cont->error); 1750 cont->error(); /* a reset just after a reset. BAD! */ 1751 } 1752 cont->redo(); 1753 } 1754 1755 /* 1756 * reset is done by pulling bit 2 of DOR low for a while (old FDCs), 1757 * or by setting the self clearing bit 7 of STATUS (newer FDCs) 1758 */ 1759 static void reset_fdc(void) 1760 { 1761 unsigned long flags; 1762 1763 do_floppy = reset_interrupt; 1764 FDCS->reset = 0; 1765 reset_fdc_info(0); 1766 1767 /* Pseudo-DMA may intercept 'reset finished' interrupt. */ 1768 /* Irrelevant for systems with true DMA (i386). */ 1769 1770 flags = claim_dma_lock(); 1771 fd_disable_dma(); 1772 release_dma_lock(flags); 1773 1774 if (FDCS->version >= FDC_82072A) 1775 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); 1776 else { 1777 fd_outb(FDCS->dor & ~0x04, FD_DOR); 1778 udelay(FD_RESET_DELAY); 1779 fd_outb(FDCS->dor, FD_DOR); 1780 } 1781 } 1782 1783 static void show_floppy(void) 1784 { 1785 int i; 1786 1787 pr_info("\n"); 1788 pr_info("floppy driver state\n"); 1789 pr_info("-------------------\n"); 1790 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", 1791 jiffies, interruptjiffies, jiffies - interruptjiffies, 1792 lasthandler); 1793 1794 pr_info("timeout_message=%s\n", timeout_message); 1795 pr_info("last output bytes:\n"); 1796 for (i = 0; i < OLOGSIZE; i++) 1797 pr_info("%2x %2x %lu\n", 1798 output_log[(i + output_log_pos) % OLOGSIZE].data, 1799 output_log[(i + output_log_pos) % OLOGSIZE].status, 1800 output_log[(i + output_log_pos) % OLOGSIZE].jiffies); 1801 pr_info("last result at %lu\n", resultjiffies); 1802 pr_info("last redo_fd_request at %lu\n", lastredo); 1803 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, 1804 reply_buffer, resultsize, true); 1805 1806 pr_info("status=%x\n", fd_inb(FD_STATUS)); 1807 pr_info("fdc_busy=%lu\n", fdc_busy); 1808 if (do_floppy) 1809 pr_info("do_floppy=%pf\n", do_floppy); 1810 if (work_pending(&floppy_work)) 1811 pr_info("floppy_work.func=%pf\n", floppy_work.func); 1812 if (delayed_work_pending(&fd_timer)) 1813 pr_info("delayed work.function=%p expires=%ld\n", 1814 fd_timer.work.func, 1815 fd_timer.timer.expires - jiffies); 1816 if (delayed_work_pending(&fd_timeout)) 1817 pr_info("timer_function=%p expires=%ld\n", 1818 fd_timeout.work.func, 1819 fd_timeout.timer.expires - jiffies); 1820 1821 pr_info("cont=%p\n", cont); 1822 pr_info("current_req=%p\n", current_req); 1823 pr_info("command_status=%d\n", command_status); 1824 pr_info("\n"); 1825 } 1826 1827 static void floppy_shutdown(struct work_struct *arg) 1828 { 1829 unsigned long flags; 1830 1831 if (initialized) 1832 show_floppy(); 1833 cancel_activity(); 1834 1835 flags = claim_dma_lock(); 1836 fd_disable_dma(); 1837 release_dma_lock(flags); 1838 1839 /* avoid dma going to a random drive after shutdown */ 1840 1841 if (initialized) 1842 DPRINT("floppy timeout called\n"); 1843 FDCS->reset = 1; 1844 if (cont) { 1845 cont->done(0); 1846 cont->redo(); /* this will recall reset when needed */ 1847 } else { 1848 pr_info("no cont in shutdown!\n"); 1849 process_fd_request(); 1850 } 1851 is_alive(__func__, ""); 1852 } 1853 1854 /* start motor, check media-changed condition and write protection */ 1855 static int start_motor(void (*function)(void)) 1856 { 1857 int mask; 1858 int data; 1859 1860 mask = 0xfc; 1861 data = UNIT(current_drive); 1862 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { 1863 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { 1864 set_debugt(); 1865 /* no read since this drive is running */ 1866 DRS->first_read_date = 0; 1867 /* note motor start time if motor is not yet running */ 1868 DRS->spinup_date = jiffies; 1869 data |= (0x10 << UNIT(current_drive)); 1870 } 1871 } else if (FDCS->dor & (0x10 << UNIT(current_drive))) 1872 mask &= ~(0x10 << UNIT(current_drive)); 1873 1874 /* starts motor and selects floppy */ 1875 del_timer(motor_off_timer + current_drive); 1876 set_dor(fdc, mask, data); 1877 1878 /* wait_for_completion also schedules reset if needed. */ 1879 return fd_wait_for_completion(DRS->select_date + DP->select_delay, 1880 function); 1881 } 1882 1883 static void floppy_ready(void) 1884 { 1885 if (FDCS->reset) { 1886 reset_fdc(); 1887 return; 1888 } 1889 if (start_motor(floppy_ready)) 1890 return; 1891 if (fdc_dtr()) 1892 return; 1893 1894 debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); 1895 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && 1896 disk_change(current_drive) && !DP->select_delay) 1897 twaddle(); /* this clears the dcl on certain 1898 * drive/controller combinations */ 1899 1900 #ifdef fd_chose_dma_mode 1901 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { 1902 unsigned long flags = claim_dma_lock(); 1903 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); 1904 release_dma_lock(flags); 1905 } 1906 #endif 1907 1908 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { 1909 perpendicular_mode(); 1910 fdc_specify(); /* must be done here because of hut, hlt ... */ 1911 seek_floppy(); 1912 } else { 1913 if ((raw_cmd->flags & FD_RAW_READ) || 1914 (raw_cmd->flags & FD_RAW_WRITE)) 1915 fdc_specify(); 1916 setup_rw_floppy(); 1917 } 1918 } 1919 1920 static void floppy_start(void) 1921 { 1922 reschedule_timeout(current_reqD, "floppy start"); 1923 1924 scandrives(); 1925 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); 1926 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1927 floppy_ready(); 1928 } 1929 1930 /* 1931 * ======================================================================== 1932 * here ends the bottom half. Exported routines are: 1933 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, 1934 * start_motor, reset_fdc, reset_fdc_info, interpret_errors. 1935 * Initialization also uses output_byte, result, set_dor, floppy_interrupt 1936 * and set_dor. 1937 * ======================================================================== 1938 */ 1939 /* 1940 * General purpose continuations. 1941 * ============================== 1942 */ 1943 1944 static void do_wakeup(void) 1945 { 1946 reschedule_timeout(MAXTIMEOUT, "do wakeup"); 1947 cont = NULL; 1948 command_status += 2; 1949 wake_up(&command_done); 1950 } 1951 1952 static const struct cont_t wakeup_cont = { 1953 .interrupt = empty, 1954 .redo = do_wakeup, 1955 .error = empty, 1956 .done = (done_f)empty 1957 }; 1958 1959 static const struct cont_t intr_cont = { 1960 .interrupt = empty, 1961 .redo = process_fd_request, 1962 .error = empty, 1963 .done = (done_f)empty 1964 }; 1965 1966 static int wait_til_done(void (*handler)(void), bool interruptible) 1967 { 1968 int ret; 1969 1970 schedule_bh(handler); 1971 1972 if (interruptible) 1973 wait_event_interruptible(command_done, command_status >= 2); 1974 else 1975 wait_event(command_done, command_status >= 2); 1976 1977 if (command_status < 2) { 1978 cancel_activity(); 1979 cont = &intr_cont; 1980 reset_fdc(); 1981 return -EINTR; 1982 } 1983 1984 if (FDCS->reset) 1985 command_status = FD_COMMAND_ERROR; 1986 if (command_status == FD_COMMAND_OKAY) 1987 ret = 0; 1988 else 1989 ret = -EIO; 1990 command_status = FD_COMMAND_NONE; 1991 return ret; 1992 } 1993 1994 static void generic_done(int result) 1995 { 1996 command_status = result; 1997 cont = &wakeup_cont; 1998 } 1999 2000 static void generic_success(void) 2001 { 2002 cont->done(1); 2003 } 2004 2005 static void generic_failure(void) 2006 { 2007 cont->done(0); 2008 } 2009 2010 static void success_and_wakeup(void) 2011 { 2012 generic_success(); 2013 cont->redo(); 2014 } 2015 2016 /* 2017 * formatting and rw support. 2018 * ========================== 2019 */ 2020 2021 static int next_valid_format(void) 2022 { 2023 int probed_format; 2024 2025 probed_format = DRS->probed_format; 2026 while (1) { 2027 if (probed_format >= 8 || !DP->autodetect[probed_format]) { 2028 DRS->probed_format = 0; 2029 return 1; 2030 } 2031 if (floppy_type[DP->autodetect[probed_format]].sect) { 2032 DRS->probed_format = probed_format; 2033 return 0; 2034 } 2035 probed_format++; 2036 } 2037 } 2038 2039 static void bad_flp_intr(void) 2040 { 2041 int err_count; 2042 2043 if (probing) { 2044 DRS->probed_format++; 2045 if (!next_valid_format()) 2046 return; 2047 } 2048 err_count = ++(*errors); 2049 INFBOUND(DRWE->badness, err_count); 2050 if (err_count > DP->max_errors.abort) 2051 cont->done(0); 2052 if (err_count > DP->max_errors.reset) 2053 FDCS->reset = 1; 2054 else if (err_count > DP->max_errors.recal) 2055 DRS->track = NEED_2_RECAL; 2056 } 2057 2058 static void set_floppy(int drive) 2059 { 2060 int type = ITYPE(UDRS->fd_device); 2061 2062 if (type) 2063 _floppy = floppy_type + type; 2064 else 2065 _floppy = current_type[drive]; 2066 } 2067 2068 /* 2069 * formatting support. 2070 * =================== 2071 */ 2072 static void format_interrupt(void) 2073 { 2074 switch (interpret_errors()) { 2075 case 1: 2076 cont->error(); 2077 case 2: 2078 break; 2079 case 0: 2080 cont->done(1); 2081 } 2082 cont->redo(); 2083 } 2084 2085 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) 2086 #define CT(x) ((x) | 0xc0) 2087 2088 static void setup_format_params(int track) 2089 { 2090 int n; 2091 int il; 2092 int count; 2093 int head_shift; 2094 int track_shift; 2095 struct fparm { 2096 unsigned char track, head, sect, size; 2097 } *here = (struct fparm *)floppy_track_buffer; 2098 2099 raw_cmd = &default_raw_cmd; 2100 raw_cmd->track = track; 2101 2102 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | 2103 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); 2104 raw_cmd->rate = _floppy->rate & 0x43; 2105 raw_cmd->cmd_count = NR_F; 2106 COMMAND = FM_MODE(_floppy, FD_FORMAT); 2107 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); 2108 F_SIZECODE = FD_SIZECODE(_floppy); 2109 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; 2110 F_GAP = _floppy->fmt_gap; 2111 F_FILL = FD_FILL_BYTE; 2112 2113 raw_cmd->kernel_data = floppy_track_buffer; 2114 raw_cmd->length = 4 * F_SECT_PER_TRACK; 2115 2116 /* allow for about 30ms for data transport per track */ 2117 head_shift = (F_SECT_PER_TRACK + 5) / 6; 2118 2119 /* a ``cylinder'' is two tracks plus a little stepping time */ 2120 track_shift = 2 * head_shift + 3; 2121 2122 /* position of logical sector 1 on this track */ 2123 n = (track_shift * format_req.track + head_shift * format_req.head) 2124 % F_SECT_PER_TRACK; 2125 2126 /* determine interleave */ 2127 il = 1; 2128 if (_floppy->fmt_gap < 0x22) 2129 il++; 2130 2131 /* initialize field */ 2132 for (count = 0; count < F_SECT_PER_TRACK; ++count) { 2133 here[count].track = format_req.track; 2134 here[count].head = format_req.head; 2135 here[count].sect = 0; 2136 here[count].size = F_SIZECODE; 2137 } 2138 /* place logical sectors */ 2139 for (count = 1; count <= F_SECT_PER_TRACK; ++count) { 2140 here[n].sect = count; 2141 n = (n + il) % F_SECT_PER_TRACK; 2142 if (here[n].sect) { /* sector busy, find next free sector */ 2143 ++n; 2144 if (n >= F_SECT_PER_TRACK) { 2145 n -= F_SECT_PER_TRACK; 2146 while (here[n].sect) 2147 ++n; 2148 } 2149 } 2150 } 2151 if (_floppy->stretch & FD_SECTBASEMASK) { 2152 for (count = 0; count < F_SECT_PER_TRACK; count++) 2153 here[count].sect += FD_SECTBASE(_floppy) - 1; 2154 } 2155 } 2156 2157 static void redo_format(void) 2158 { 2159 buffer_track = -1; 2160 setup_format_params(format_req.track << STRETCH(_floppy)); 2161 floppy_start(); 2162 debugt(__func__, "queue format request"); 2163 } 2164 2165 static const struct cont_t format_cont = { 2166 .interrupt = format_interrupt, 2167 .redo = redo_format, 2168 .error = bad_flp_intr, 2169 .done = generic_done 2170 }; 2171 2172 static int do_format(int drive, struct format_descr *tmp_format_req) 2173 { 2174 int ret; 2175 2176 if (lock_fdc(drive)) 2177 return -EINTR; 2178 2179 set_floppy(drive); 2180 if (!_floppy || 2181 _floppy->track > DP->tracks || 2182 tmp_format_req->track >= _floppy->track || 2183 tmp_format_req->head >= _floppy->head || 2184 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || 2185 !_floppy->fmt_gap) { 2186 process_fd_request(); 2187 return -EINVAL; 2188 } 2189 format_req = *tmp_format_req; 2190 format_errors = 0; 2191 cont = &format_cont; 2192 errors = &format_errors; 2193 ret = wait_til_done(redo_format, true); 2194 if (ret == -EINTR) 2195 return -EINTR; 2196 process_fd_request(); 2197 return ret; 2198 } 2199 2200 /* 2201 * Buffer read/write and support 2202 * ============================= 2203 */ 2204 2205 static void floppy_end_request(struct request *req, int error) 2206 { 2207 unsigned int nr_sectors = current_count_sectors; 2208 unsigned int drive = (unsigned long)req->rq_disk->private_data; 2209 2210 /* current_count_sectors can be zero if transfer failed */ 2211 if (error) 2212 nr_sectors = blk_rq_cur_sectors(req); 2213 if (__blk_end_request(req, error, nr_sectors << 9)) 2214 return; 2215 2216 /* We're done with the request */ 2217 floppy_off(drive); 2218 current_req = NULL; 2219 } 2220 2221 /* new request_done. Can handle physical sectors which are smaller than a 2222 * logical buffer */ 2223 static void request_done(int uptodate) 2224 { 2225 struct request *req = current_req; 2226 struct request_queue *q; 2227 unsigned long flags; 2228 int block; 2229 char msg[sizeof("request done ") + sizeof(int) * 3]; 2230 2231 probing = 0; 2232 snprintf(msg, sizeof(msg), "request done %d", uptodate); 2233 reschedule_timeout(MAXTIMEOUT, msg); 2234 2235 if (!req) { 2236 pr_info("floppy.c: no request in request_done\n"); 2237 return; 2238 } 2239 2240 q = req->q; 2241 2242 if (uptodate) { 2243 /* maintain values for invalidation on geometry 2244 * change */ 2245 block = current_count_sectors + blk_rq_pos(req); 2246 INFBOUND(DRS->maxblock, block); 2247 if (block > _floppy->sect) 2248 DRS->maxtrack = 1; 2249 2250 /* unlock chained buffers */ 2251 spin_lock_irqsave(q->queue_lock, flags); 2252 floppy_end_request(req, 0); 2253 spin_unlock_irqrestore(q->queue_lock, flags); 2254 } else { 2255 if (rq_data_dir(req) == WRITE) { 2256 /* record write error information */ 2257 DRWE->write_errors++; 2258 if (DRWE->write_errors == 1) { 2259 DRWE->first_error_sector = blk_rq_pos(req); 2260 DRWE->first_error_generation = DRS->generation; 2261 } 2262 DRWE->last_error_sector = blk_rq_pos(req); 2263 DRWE->last_error_generation = DRS->generation; 2264 } 2265 spin_lock_irqsave(q->queue_lock, flags); 2266 floppy_end_request(req, -EIO); 2267 spin_unlock_irqrestore(q->queue_lock, flags); 2268 } 2269 } 2270 2271 /* Interrupt handler evaluating the result of the r/w operation */ 2272 static void rw_interrupt(void) 2273 { 2274 int eoc; 2275 int ssize; 2276 int heads; 2277 int nr_sectors; 2278 2279 if (R_HEAD >= 2) { 2280 /* some Toshiba floppy controllers occasionnally seem to 2281 * return bogus interrupts after read/write operations, which 2282 * can be recognized by a bad head number (>= 2) */ 2283 return; 2284 } 2285 2286 if (!DRS->first_read_date) 2287 DRS->first_read_date = jiffies; 2288 2289 nr_sectors = 0; 2290 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2291 2292 if (ST1 & ST1_EOC) 2293 eoc = 1; 2294 else 2295 eoc = 0; 2296 2297 if (COMMAND & 0x80) 2298 heads = 2; 2299 else 2300 heads = 1; 2301 2302 nr_sectors = (((R_TRACK - TRACK) * heads + 2303 R_HEAD - HEAD) * SECT_PER_TRACK + 2304 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; 2305 2306 if (nr_sectors / ssize > 2307 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { 2308 DPRINT("long rw: %x instead of %lx\n", 2309 nr_sectors, current_count_sectors); 2310 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); 2311 pr_info("rh=%d h=%d\n", R_HEAD, HEAD); 2312 pr_info("rt=%d t=%d\n", R_TRACK, TRACK); 2313 pr_info("heads=%d eoc=%d\n", heads, eoc); 2314 pr_info("spt=%d st=%d ss=%d\n", 2315 SECT_PER_TRACK, fsector_t, ssize); 2316 pr_info("in_sector_offset=%d\n", in_sector_offset); 2317 } 2318 2319 nr_sectors -= in_sector_offset; 2320 INFBOUND(nr_sectors, 0); 2321 SUPBOUND(current_count_sectors, nr_sectors); 2322 2323 switch (interpret_errors()) { 2324 case 2: 2325 cont->redo(); 2326 return; 2327 case 1: 2328 if (!current_count_sectors) { 2329 cont->error(); 2330 cont->redo(); 2331 return; 2332 } 2333 break; 2334 case 0: 2335 if (!current_count_sectors) { 2336 cont->redo(); 2337 return; 2338 } 2339 current_type[current_drive] = _floppy; 2340 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2341 break; 2342 } 2343 2344 if (probing) { 2345 if (DP->flags & FTD_MSG) 2346 DPRINT("Auto-detected floppy type %s in fd%d\n", 2347 _floppy->name, current_drive); 2348 current_type[current_drive] = _floppy; 2349 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2350 probing = 0; 2351 } 2352 2353 if (CT(COMMAND) != FD_READ || 2354 raw_cmd->kernel_data == bio_data(current_req->bio)) { 2355 /* transfer directly from buffer */ 2356 cont->done(1); 2357 } else if (CT(COMMAND) == FD_READ) { 2358 buffer_track = raw_cmd->track; 2359 buffer_drive = current_drive; 2360 INFBOUND(buffer_max, nr_sectors + fsector_t); 2361 } 2362 cont->redo(); 2363 } 2364 2365 /* Compute maximal contiguous buffer size. */ 2366 static int buffer_chain_size(void) 2367 { 2368 struct bio_vec bv; 2369 int size; 2370 struct req_iterator iter; 2371 char *base; 2372 2373 base = bio_data(current_req->bio); 2374 size = 0; 2375 2376 rq_for_each_segment(bv, current_req, iter) { 2377 if (page_address(bv.bv_page) + bv.bv_offset != base + size) 2378 break; 2379 2380 size += bv.bv_len; 2381 } 2382 2383 return size >> 9; 2384 } 2385 2386 /* Compute the maximal transfer size */ 2387 static int transfer_size(int ssize, int max_sector, int max_size) 2388 { 2389 SUPBOUND(max_sector, fsector_t + max_size); 2390 2391 /* alignment */ 2392 max_sector -= (max_sector % _floppy->sect) % ssize; 2393 2394 /* transfer size, beginning not aligned */ 2395 current_count_sectors = max_sector - fsector_t; 2396 2397 return max_sector; 2398 } 2399 2400 /* 2401 * Move data from/to the track buffer to/from the buffer cache. 2402 */ 2403 static void copy_buffer(int ssize, int max_sector, int max_sector_2) 2404 { 2405 int remaining; /* number of transferred 512-byte sectors */ 2406 struct bio_vec bv; 2407 char *buffer; 2408 char *dma_buffer; 2409 int size; 2410 struct req_iterator iter; 2411 2412 max_sector = transfer_size(ssize, 2413 min(max_sector, max_sector_2), 2414 blk_rq_sectors(current_req)); 2415 2416 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && 2417 buffer_max > fsector_t + blk_rq_sectors(current_req)) 2418 current_count_sectors = min_t(int, buffer_max - fsector_t, 2419 blk_rq_sectors(current_req)); 2420 2421 remaining = current_count_sectors << 9; 2422 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { 2423 DPRINT("in copy buffer\n"); 2424 pr_info("current_count_sectors=%ld\n", current_count_sectors); 2425 pr_info("remaining=%d\n", remaining >> 9); 2426 pr_info("current_req->nr_sectors=%u\n", 2427 blk_rq_sectors(current_req)); 2428 pr_info("current_req->current_nr_sectors=%u\n", 2429 blk_rq_cur_sectors(current_req)); 2430 pr_info("max_sector=%d\n", max_sector); 2431 pr_info("ssize=%d\n", ssize); 2432 } 2433 2434 buffer_max = max(max_sector, buffer_max); 2435 2436 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); 2437 2438 size = blk_rq_cur_bytes(current_req); 2439 2440 rq_for_each_segment(bv, current_req, iter) { 2441 if (!remaining) 2442 break; 2443 2444 size = bv.bv_len; 2445 SUPBOUND(size, remaining); 2446 2447 buffer = page_address(bv.bv_page) + bv.bv_offset; 2448 if (dma_buffer + size > 2449 floppy_track_buffer + (max_buffer_sectors << 10) || 2450 dma_buffer < floppy_track_buffer) { 2451 DPRINT("buffer overrun in copy buffer %d\n", 2452 (int)((floppy_track_buffer - dma_buffer) >> 9)); 2453 pr_info("fsector_t=%d buffer_min=%d\n", 2454 fsector_t, buffer_min); 2455 pr_info("current_count_sectors=%ld\n", 2456 current_count_sectors); 2457 if (CT(COMMAND) == FD_READ) 2458 pr_info("read\n"); 2459 if (CT(COMMAND) == FD_WRITE) 2460 pr_info("write\n"); 2461 break; 2462 } 2463 if (((unsigned long)buffer) % 512) 2464 DPRINT("%p buffer not aligned\n", buffer); 2465 2466 if (CT(COMMAND) == FD_READ) 2467 memcpy(buffer, dma_buffer, size); 2468 else 2469 memcpy(dma_buffer, buffer, size); 2470 2471 remaining -= size; 2472 dma_buffer += size; 2473 } 2474 if (remaining) { 2475 if (remaining > 0) 2476 max_sector -= remaining >> 9; 2477 DPRINT("weirdness: remaining %d\n", remaining >> 9); 2478 } 2479 } 2480 2481 /* work around a bug in pseudo DMA 2482 * (on some FDCs) pseudo DMA does not stop when the CPU stops 2483 * sending data. Hence we need a different way to signal the 2484 * transfer length: We use SECT_PER_TRACK. Unfortunately, this 2485 * does not work with MT, hence we can only transfer one head at 2486 * a time 2487 */ 2488 static void virtualdmabug_workaround(void) 2489 { 2490 int hard_sectors; 2491 int end_sector; 2492 2493 if (CT(COMMAND) == FD_WRITE) { 2494 COMMAND &= ~0x80; /* switch off multiple track mode */ 2495 2496 hard_sectors = raw_cmd->length >> (7 + SIZECODE); 2497 end_sector = SECTOR + hard_sectors - 1; 2498 if (end_sector > SECT_PER_TRACK) { 2499 pr_info("too many sectors %d > %d\n", 2500 end_sector, SECT_PER_TRACK); 2501 return; 2502 } 2503 SECT_PER_TRACK = end_sector; 2504 /* make sure SECT_PER_TRACK 2505 * points to end of transfer */ 2506 } 2507 } 2508 2509 /* 2510 * Formulate a read/write request. 2511 * this routine decides where to load the data (directly to buffer, or to 2512 * tmp floppy area), how much data to load (the size of the buffer, the whole 2513 * track, or a single sector) 2514 * All floppy_track_buffer handling goes in here. If we ever add track buffer 2515 * allocation on the fly, it should be done here. No other part should need 2516 * modification. 2517 */ 2518 2519 static int make_raw_rw_request(void) 2520 { 2521 int aligned_sector_t; 2522 int max_sector; 2523 int max_size; 2524 int tracksize; 2525 int ssize; 2526 2527 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) 2528 return 0; 2529 2530 set_fdc((long)current_req->rq_disk->private_data); 2531 2532 raw_cmd = &default_raw_cmd; 2533 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; 2534 raw_cmd->cmd_count = NR_RW; 2535 if (rq_data_dir(current_req) == READ) { 2536 raw_cmd->flags |= FD_RAW_READ; 2537 COMMAND = FM_MODE(_floppy, FD_READ); 2538 } else if (rq_data_dir(current_req) == WRITE) { 2539 raw_cmd->flags |= FD_RAW_WRITE; 2540 COMMAND = FM_MODE(_floppy, FD_WRITE); 2541 } else { 2542 DPRINT("%s: unknown command\n", __func__); 2543 return 0; 2544 } 2545 2546 max_sector = _floppy->sect * _floppy->head; 2547 2548 TRACK = (int)blk_rq_pos(current_req) / max_sector; 2549 fsector_t = (int)blk_rq_pos(current_req) % max_sector; 2550 if (_floppy->track && TRACK >= _floppy->track) { 2551 if (blk_rq_cur_sectors(current_req) & 1) { 2552 current_count_sectors = 1; 2553 return 1; 2554 } else 2555 return 0; 2556 } 2557 HEAD = fsector_t / _floppy->sect; 2558 2559 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || 2560 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && 2561 fsector_t < _floppy->sect) 2562 max_sector = _floppy->sect; 2563 2564 /* 2M disks have phantom sectors on the first track */ 2565 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { 2566 max_sector = 2 * _floppy->sect / 3; 2567 if (fsector_t >= max_sector) { 2568 current_count_sectors = 2569 min_t(int, _floppy->sect - fsector_t, 2570 blk_rq_sectors(current_req)); 2571 return 1; 2572 } 2573 SIZECODE = 2; 2574 } else 2575 SIZECODE = FD_SIZECODE(_floppy); 2576 raw_cmd->rate = _floppy->rate & 0x43; 2577 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) 2578 raw_cmd->rate = 1; 2579 2580 if (SIZECODE) 2581 SIZECODE2 = 0xff; 2582 else 2583 SIZECODE2 = 0x80; 2584 raw_cmd->track = TRACK << STRETCH(_floppy); 2585 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); 2586 GAP = _floppy->gap; 2587 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2588 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; 2589 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + 2590 FD_SECTBASE(_floppy); 2591 2592 /* tracksize describes the size which can be filled up with sectors 2593 * of size ssize. 2594 */ 2595 tracksize = _floppy->sect - _floppy->sect % ssize; 2596 if (tracksize < _floppy->sect) { 2597 SECT_PER_TRACK++; 2598 if (tracksize <= fsector_t % _floppy->sect) 2599 SECTOR--; 2600 2601 /* if we are beyond tracksize, fill up using smaller sectors */ 2602 while (tracksize <= fsector_t % _floppy->sect) { 2603 while (tracksize + ssize > _floppy->sect) { 2604 SIZECODE--; 2605 ssize >>= 1; 2606 } 2607 SECTOR++; 2608 SECT_PER_TRACK++; 2609 tracksize += ssize; 2610 } 2611 max_sector = HEAD * _floppy->sect + tracksize; 2612 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { 2613 max_sector = _floppy->sect; 2614 } else if (!HEAD && CT(COMMAND) == FD_WRITE) { 2615 /* for virtual DMA bug workaround */ 2616 max_sector = _floppy->sect; 2617 } 2618 2619 in_sector_offset = (fsector_t % _floppy->sect) % ssize; 2620 aligned_sector_t = fsector_t - in_sector_offset; 2621 max_size = blk_rq_sectors(current_req); 2622 if ((raw_cmd->track == buffer_track) && 2623 (current_drive == buffer_drive) && 2624 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { 2625 /* data already in track buffer */ 2626 if (CT(COMMAND) == FD_READ) { 2627 copy_buffer(1, max_sector, buffer_max); 2628 return 1; 2629 } 2630 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { 2631 if (CT(COMMAND) == FD_WRITE) { 2632 unsigned int sectors; 2633 2634 sectors = fsector_t + blk_rq_sectors(current_req); 2635 if (sectors > ssize && sectors < ssize + ssize) 2636 max_size = ssize + ssize; 2637 else 2638 max_size = ssize; 2639 } 2640 raw_cmd->flags &= ~FD_RAW_WRITE; 2641 raw_cmd->flags |= FD_RAW_READ; 2642 COMMAND = FM_MODE(_floppy, FD_READ); 2643 } else if ((unsigned long)bio_data(current_req->bio) < MAX_DMA_ADDRESS) { 2644 unsigned long dma_limit; 2645 int direct, indirect; 2646 2647 indirect = 2648 transfer_size(ssize, max_sector, 2649 max_buffer_sectors * 2) - fsector_t; 2650 2651 /* 2652 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide 2653 * on a 64 bit machine! 2654 */ 2655 max_size = buffer_chain_size(); 2656 dma_limit = (MAX_DMA_ADDRESS - 2657 ((unsigned long)bio_data(current_req->bio))) >> 9; 2658 if ((unsigned long)max_size > dma_limit) 2659 max_size = dma_limit; 2660 /* 64 kb boundaries */ 2661 if (CROSS_64KB(bio_data(current_req->bio), max_size << 9)) 2662 max_size = (K_64 - 2663 ((unsigned long)bio_data(current_req->bio)) % 2664 K_64) >> 9; 2665 direct = transfer_size(ssize, max_sector, max_size) - fsector_t; 2666 /* 2667 * We try to read tracks, but if we get too many errors, we 2668 * go back to reading just one sector at a time. 2669 * 2670 * This means we should be able to read a sector even if there 2671 * are other bad sectors on this track. 2672 */ 2673 if (!direct || 2674 (indirect * 2 > direct * 3 && 2675 *errors < DP->max_errors.read_track && 2676 ((!probing || 2677 (DP->read_track & (1 << DRS->probed_format)))))) { 2678 max_size = blk_rq_sectors(current_req); 2679 } else { 2680 raw_cmd->kernel_data = bio_data(current_req->bio); 2681 raw_cmd->length = current_count_sectors << 9; 2682 if (raw_cmd->length == 0) { 2683 DPRINT("%s: zero dma transfer attempted\n", __func__); 2684 DPRINT("indirect=%d direct=%d fsector_t=%d\n", 2685 indirect, direct, fsector_t); 2686 return 0; 2687 } 2688 virtualdmabug_workaround(); 2689 return 2; 2690 } 2691 } 2692 2693 if (CT(COMMAND) == FD_READ) 2694 max_size = max_sector; /* unbounded */ 2695 2696 /* claim buffer track if needed */ 2697 if (buffer_track != raw_cmd->track || /* bad track */ 2698 buffer_drive != current_drive || /* bad drive */ 2699 fsector_t > buffer_max || 2700 fsector_t < buffer_min || 2701 ((CT(COMMAND) == FD_READ || 2702 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && 2703 max_sector > 2 * max_buffer_sectors + buffer_min && 2704 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { 2705 /* not enough space */ 2706 buffer_track = -1; 2707 buffer_drive = current_drive; 2708 buffer_max = buffer_min = aligned_sector_t; 2709 } 2710 raw_cmd->kernel_data = floppy_track_buffer + 2711 ((aligned_sector_t - buffer_min) << 9); 2712 2713 if (CT(COMMAND) == FD_WRITE) { 2714 /* copy write buffer to track buffer. 2715 * if we get here, we know that the write 2716 * is either aligned or the data already in the buffer 2717 * (buffer will be overwritten) */ 2718 if (in_sector_offset && buffer_track == -1) 2719 DPRINT("internal error offset !=0 on write\n"); 2720 buffer_track = raw_cmd->track; 2721 buffer_drive = current_drive; 2722 copy_buffer(ssize, max_sector, 2723 2 * max_buffer_sectors + buffer_min); 2724 } else 2725 transfer_size(ssize, max_sector, 2726 2 * max_buffer_sectors + buffer_min - 2727 aligned_sector_t); 2728 2729 /* round up current_count_sectors to get dma xfer size */ 2730 raw_cmd->length = in_sector_offset + current_count_sectors; 2731 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; 2732 raw_cmd->length <<= 9; 2733 if ((raw_cmd->length < current_count_sectors << 9) || 2734 (raw_cmd->kernel_data != bio_data(current_req->bio) && 2735 CT(COMMAND) == FD_WRITE && 2736 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || 2737 aligned_sector_t < buffer_min)) || 2738 raw_cmd->length % (128 << SIZECODE) || 2739 raw_cmd->length <= 0 || current_count_sectors <= 0) { 2740 DPRINT("fractionary current count b=%lx s=%lx\n", 2741 raw_cmd->length, current_count_sectors); 2742 if (raw_cmd->kernel_data != bio_data(current_req->bio)) 2743 pr_info("addr=%d, length=%ld\n", 2744 (int)((raw_cmd->kernel_data - 2745 floppy_track_buffer) >> 9), 2746 current_count_sectors); 2747 pr_info("st=%d ast=%d mse=%d msi=%d\n", 2748 fsector_t, aligned_sector_t, max_sector, max_size); 2749 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); 2750 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", 2751 COMMAND, SECTOR, HEAD, TRACK); 2752 pr_info("buffer drive=%d\n", buffer_drive); 2753 pr_info("buffer track=%d\n", buffer_track); 2754 pr_info("buffer_min=%d\n", buffer_min); 2755 pr_info("buffer_max=%d\n", buffer_max); 2756 return 0; 2757 } 2758 2759 if (raw_cmd->kernel_data != bio_data(current_req->bio)) { 2760 if (raw_cmd->kernel_data < floppy_track_buffer || 2761 current_count_sectors < 0 || 2762 raw_cmd->length < 0 || 2763 raw_cmd->kernel_data + raw_cmd->length > 2764 floppy_track_buffer + (max_buffer_sectors << 10)) { 2765 DPRINT("buffer overrun in schedule dma\n"); 2766 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", 2767 fsector_t, buffer_min, raw_cmd->length >> 9); 2768 pr_info("current_count_sectors=%ld\n", 2769 current_count_sectors); 2770 if (CT(COMMAND) == FD_READ) 2771 pr_info("read\n"); 2772 if (CT(COMMAND) == FD_WRITE) 2773 pr_info("write\n"); 2774 return 0; 2775 } 2776 } else if (raw_cmd->length > blk_rq_bytes(current_req) || 2777 current_count_sectors > blk_rq_sectors(current_req)) { 2778 DPRINT("buffer overrun in direct transfer\n"); 2779 return 0; 2780 } else if (raw_cmd->length < current_count_sectors << 9) { 2781 DPRINT("more sectors than bytes\n"); 2782 pr_info("bytes=%ld\n", raw_cmd->length >> 9); 2783 pr_info("sectors=%ld\n", current_count_sectors); 2784 } 2785 if (raw_cmd->length == 0) { 2786 DPRINT("zero dma transfer attempted from make_raw_request\n"); 2787 return 0; 2788 } 2789 2790 virtualdmabug_workaround(); 2791 return 2; 2792 } 2793 2794 /* 2795 * Round-robin between our available drives, doing one request from each 2796 */ 2797 static int set_next_request(void) 2798 { 2799 struct request_queue *q; 2800 int old_pos = fdc_queue; 2801 2802 do { 2803 q = disks[fdc_queue]->queue; 2804 if (++fdc_queue == N_DRIVE) 2805 fdc_queue = 0; 2806 if (q) { 2807 current_req = blk_fetch_request(q); 2808 if (current_req) 2809 break; 2810 } 2811 } while (fdc_queue != old_pos); 2812 2813 return current_req != NULL; 2814 } 2815 2816 static void redo_fd_request(void) 2817 { 2818 int drive; 2819 int tmp; 2820 2821 lastredo = jiffies; 2822 if (current_drive < N_DRIVE) 2823 floppy_off(current_drive); 2824 2825 do_request: 2826 if (!current_req) { 2827 int pending; 2828 2829 spin_lock_irq(&floppy_lock); 2830 pending = set_next_request(); 2831 spin_unlock_irq(&floppy_lock); 2832 if (!pending) { 2833 do_floppy = NULL; 2834 unlock_fdc(); 2835 return; 2836 } 2837 } 2838 drive = (long)current_req->rq_disk->private_data; 2839 set_fdc(drive); 2840 reschedule_timeout(current_reqD, "redo fd request"); 2841 2842 set_floppy(drive); 2843 raw_cmd = &default_raw_cmd; 2844 raw_cmd->flags = 0; 2845 if (start_motor(redo_fd_request)) 2846 return; 2847 2848 disk_change(current_drive); 2849 if (test_bit(current_drive, &fake_change) || 2850 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { 2851 DPRINT("disk absent or changed during operation\n"); 2852 request_done(0); 2853 goto do_request; 2854 } 2855 if (!_floppy) { /* Autodetection */ 2856 if (!probing) { 2857 DRS->probed_format = 0; 2858 if (next_valid_format()) { 2859 DPRINT("no autodetectable formats\n"); 2860 _floppy = NULL; 2861 request_done(0); 2862 goto do_request; 2863 } 2864 } 2865 probing = 1; 2866 _floppy = floppy_type + DP->autodetect[DRS->probed_format]; 2867 } else 2868 probing = 0; 2869 errors = &(current_req->errors); 2870 tmp = make_raw_rw_request(); 2871 if (tmp < 2) { 2872 request_done(tmp); 2873 goto do_request; 2874 } 2875 2876 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) 2877 twaddle(); 2878 schedule_bh(floppy_start); 2879 debugt(__func__, "queue fd request"); 2880 return; 2881 } 2882 2883 static const struct cont_t rw_cont = { 2884 .interrupt = rw_interrupt, 2885 .redo = redo_fd_request, 2886 .error = bad_flp_intr, 2887 .done = request_done 2888 }; 2889 2890 static void process_fd_request(void) 2891 { 2892 cont = &rw_cont; 2893 schedule_bh(redo_fd_request); 2894 } 2895 2896 static void do_fd_request(struct request_queue *q) 2897 { 2898 if (WARN(max_buffer_sectors == 0, 2899 "VFS: %s called on non-open device\n", __func__)) 2900 return; 2901 2902 if (WARN(atomic_read(&usage_count) == 0, 2903 "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n", 2904 current_req, (long)blk_rq_pos(current_req), 2905 (unsigned long long) current_req->cmd_flags)) 2906 return; 2907 2908 if (test_and_set_bit(0, &fdc_busy)) { 2909 /* fdc busy, this new request will be treated when the 2910 current one is done */ 2911 is_alive(__func__, "old request running"); 2912 return; 2913 } 2914 command_status = FD_COMMAND_NONE; 2915 __reschedule_timeout(MAXTIMEOUT, "fd_request"); 2916 set_fdc(0); 2917 process_fd_request(); 2918 is_alive(__func__, ""); 2919 } 2920 2921 static const struct cont_t poll_cont = { 2922 .interrupt = success_and_wakeup, 2923 .redo = floppy_ready, 2924 .error = generic_failure, 2925 .done = generic_done 2926 }; 2927 2928 static int poll_drive(bool interruptible, int flag) 2929 { 2930 /* no auto-sense, just clear dcl */ 2931 raw_cmd = &default_raw_cmd; 2932 raw_cmd->flags = flag; 2933 raw_cmd->track = 0; 2934 raw_cmd->cmd_count = 0; 2935 cont = &poll_cont; 2936 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); 2937 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 2938 2939 return wait_til_done(floppy_ready, interruptible); 2940 } 2941 2942 /* 2943 * User triggered reset 2944 * ==================== 2945 */ 2946 2947 static void reset_intr(void) 2948 { 2949 pr_info("weird, reset interrupt called\n"); 2950 } 2951 2952 static const struct cont_t reset_cont = { 2953 .interrupt = reset_intr, 2954 .redo = success_and_wakeup, 2955 .error = generic_failure, 2956 .done = generic_done 2957 }; 2958 2959 static int user_reset_fdc(int drive, int arg, bool interruptible) 2960 { 2961 int ret; 2962 2963 if (lock_fdc(drive)) 2964 return -EINTR; 2965 2966 if (arg == FD_RESET_ALWAYS) 2967 FDCS->reset = 1; 2968 if (FDCS->reset) { 2969 cont = &reset_cont; 2970 ret = wait_til_done(reset_fdc, interruptible); 2971 if (ret == -EINTR) 2972 return -EINTR; 2973 } 2974 process_fd_request(); 2975 return 0; 2976 } 2977 2978 /* 2979 * Misc Ioctl's and support 2980 * ======================== 2981 */ 2982 static inline int fd_copyout(void __user *param, const void *address, 2983 unsigned long size) 2984 { 2985 return copy_to_user(param, address, size) ? -EFAULT : 0; 2986 } 2987 2988 static inline int fd_copyin(void __user *param, void *address, 2989 unsigned long size) 2990 { 2991 return copy_from_user(address, param, size) ? -EFAULT : 0; 2992 } 2993 2994 static const char *drive_name(int type, int drive) 2995 { 2996 struct floppy_struct *floppy; 2997 2998 if (type) 2999 floppy = floppy_type + type; 3000 else { 3001 if (UDP->native_format) 3002 floppy = floppy_type + UDP->native_format; 3003 else 3004 return "(null)"; 3005 } 3006 if (floppy->name) 3007 return floppy->name; 3008 else 3009 return "(null)"; 3010 } 3011 3012 /* raw commands */ 3013 static void raw_cmd_done(int flag) 3014 { 3015 int i; 3016 3017 if (!flag) { 3018 raw_cmd->flags |= FD_RAW_FAILURE; 3019 raw_cmd->flags |= FD_RAW_HARDFAILURE; 3020 } else { 3021 raw_cmd->reply_count = inr; 3022 if (raw_cmd->reply_count > MAX_REPLIES) 3023 raw_cmd->reply_count = 0; 3024 for (i = 0; i < raw_cmd->reply_count; i++) 3025 raw_cmd->reply[i] = reply_buffer[i]; 3026 3027 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3028 unsigned long flags; 3029 flags = claim_dma_lock(); 3030 raw_cmd->length = fd_get_dma_residue(); 3031 release_dma_lock(flags); 3032 } 3033 3034 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && 3035 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) 3036 raw_cmd->flags |= FD_RAW_FAILURE; 3037 3038 if (disk_change(current_drive)) 3039 raw_cmd->flags |= FD_RAW_DISK_CHANGE; 3040 else 3041 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; 3042 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) 3043 motor_off_callback(current_drive); 3044 3045 if (raw_cmd->next && 3046 (!(raw_cmd->flags & FD_RAW_FAILURE) || 3047 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && 3048 ((raw_cmd->flags & FD_RAW_FAILURE) || 3049 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { 3050 raw_cmd = raw_cmd->next; 3051 return; 3052 } 3053 } 3054 generic_done(flag); 3055 } 3056 3057 static const struct cont_t raw_cmd_cont = { 3058 .interrupt = success_and_wakeup, 3059 .redo = floppy_start, 3060 .error = generic_failure, 3061 .done = raw_cmd_done 3062 }; 3063 3064 static int raw_cmd_copyout(int cmd, void __user *param, 3065 struct floppy_raw_cmd *ptr) 3066 { 3067 int ret; 3068 3069 while (ptr) { 3070 struct floppy_raw_cmd cmd = *ptr; 3071 cmd.next = NULL; 3072 cmd.kernel_data = NULL; 3073 ret = copy_to_user(param, &cmd, sizeof(cmd)); 3074 if (ret) 3075 return -EFAULT; 3076 param += sizeof(struct floppy_raw_cmd); 3077 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { 3078 if (ptr->length >= 0 && 3079 ptr->length <= ptr->buffer_length) { 3080 long length = ptr->buffer_length - ptr->length; 3081 ret = fd_copyout(ptr->data, ptr->kernel_data, 3082 length); 3083 if (ret) 3084 return ret; 3085 } 3086 } 3087 ptr = ptr->next; 3088 } 3089 3090 return 0; 3091 } 3092 3093 static void raw_cmd_free(struct floppy_raw_cmd **ptr) 3094 { 3095 struct floppy_raw_cmd *next; 3096 struct floppy_raw_cmd *this; 3097 3098 this = *ptr; 3099 *ptr = NULL; 3100 while (this) { 3101 if (this->buffer_length) { 3102 fd_dma_mem_free((unsigned long)this->kernel_data, 3103 this->buffer_length); 3104 this->buffer_length = 0; 3105 } 3106 next = this->next; 3107 kfree(this); 3108 this = next; 3109 } 3110 } 3111 3112 static int raw_cmd_copyin(int cmd, void __user *param, 3113 struct floppy_raw_cmd **rcmd) 3114 { 3115 struct floppy_raw_cmd *ptr; 3116 int ret; 3117 int i; 3118 3119 *rcmd = NULL; 3120 3121 loop: 3122 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL); 3123 if (!ptr) 3124 return -ENOMEM; 3125 *rcmd = ptr; 3126 ret = copy_from_user(ptr, param, sizeof(*ptr)); 3127 ptr->next = NULL; 3128 ptr->buffer_length = 0; 3129 ptr->kernel_data = NULL; 3130 if (ret) 3131 return -EFAULT; 3132 param += sizeof(struct floppy_raw_cmd); 3133 if (ptr->cmd_count > 33) 3134 /* the command may now also take up the space 3135 * initially intended for the reply & the 3136 * reply count. Needed for long 82078 commands 3137 * such as RESTORE, which takes ... 17 command 3138 * bytes. Murphy's law #137: When you reserve 3139 * 16 bytes for a structure, you'll one day 3140 * discover that you really need 17... 3141 */ 3142 return -EINVAL; 3143 3144 for (i = 0; i < 16; i++) 3145 ptr->reply[i] = 0; 3146 ptr->resultcode = 0; 3147 3148 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3149 if (ptr->length <= 0) 3150 return -EINVAL; 3151 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); 3152 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); 3153 if (!ptr->kernel_data) 3154 return -ENOMEM; 3155 ptr->buffer_length = ptr->length; 3156 } 3157 if (ptr->flags & FD_RAW_WRITE) { 3158 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); 3159 if (ret) 3160 return ret; 3161 } 3162 3163 if (ptr->flags & FD_RAW_MORE) { 3164 rcmd = &(ptr->next); 3165 ptr->rate &= 0x43; 3166 goto loop; 3167 } 3168 3169 return 0; 3170 } 3171 3172 static int raw_cmd_ioctl(int cmd, void __user *param) 3173 { 3174 struct floppy_raw_cmd *my_raw_cmd; 3175 int drive; 3176 int ret2; 3177 int ret; 3178 3179 if (FDCS->rawcmd <= 1) 3180 FDCS->rawcmd = 1; 3181 for (drive = 0; drive < N_DRIVE; drive++) { 3182 if (FDC(drive) != fdc) 3183 continue; 3184 if (drive == current_drive) { 3185 if (UDRS->fd_ref > 1) { 3186 FDCS->rawcmd = 2; 3187 break; 3188 } 3189 } else if (UDRS->fd_ref) { 3190 FDCS->rawcmd = 2; 3191 break; 3192 } 3193 } 3194 3195 if (FDCS->reset) 3196 return -EIO; 3197 3198 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); 3199 if (ret) { 3200 raw_cmd_free(&my_raw_cmd); 3201 return ret; 3202 } 3203 3204 raw_cmd = my_raw_cmd; 3205 cont = &raw_cmd_cont; 3206 ret = wait_til_done(floppy_start, true); 3207 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); 3208 3209 if (ret != -EINTR && FDCS->reset) 3210 ret = -EIO; 3211 3212 DRS->track = NO_TRACK; 3213 3214 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); 3215 if (!ret) 3216 ret = ret2; 3217 raw_cmd_free(&my_raw_cmd); 3218 return ret; 3219 } 3220 3221 static int invalidate_drive(struct block_device *bdev) 3222 { 3223 /* invalidate the buffer track to force a reread */ 3224 set_bit((long)bdev->bd_disk->private_data, &fake_change); 3225 process_fd_request(); 3226 check_disk_change(bdev); 3227 return 0; 3228 } 3229 3230 static int set_geometry(unsigned int cmd, struct floppy_struct *g, 3231 int drive, int type, struct block_device *bdev) 3232 { 3233 int cnt; 3234 3235 /* sanity checking for parameters. */ 3236 if (g->sect <= 0 || 3237 g->head <= 0 || 3238 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || 3239 /* check if reserved bits are set */ 3240 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) 3241 return -EINVAL; 3242 if (type) { 3243 if (!capable(CAP_SYS_ADMIN)) 3244 return -EPERM; 3245 mutex_lock(&open_lock); 3246 if (lock_fdc(drive)) { 3247 mutex_unlock(&open_lock); 3248 return -EINTR; 3249 } 3250 floppy_type[type] = *g; 3251 floppy_type[type].name = "user format"; 3252 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) 3253 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = 3254 floppy_type[type].size + 1; 3255 process_fd_request(); 3256 for (cnt = 0; cnt < N_DRIVE; cnt++) { 3257 struct block_device *bdev = opened_bdev[cnt]; 3258 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) 3259 continue; 3260 __invalidate_device(bdev, true); 3261 } 3262 mutex_unlock(&open_lock); 3263 } else { 3264 int oldStretch; 3265 3266 if (lock_fdc(drive)) 3267 return -EINTR; 3268 if (cmd != FDDEFPRM) { 3269 /* notice a disk change immediately, else 3270 * we lose our settings immediately*/ 3271 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3272 return -EINTR; 3273 } 3274 oldStretch = g->stretch; 3275 user_params[drive] = *g; 3276 if (buffer_drive == drive) 3277 SUPBOUND(buffer_max, user_params[drive].sect); 3278 current_type[drive] = &user_params[drive]; 3279 floppy_sizes[drive] = user_params[drive].size; 3280 if (cmd == FDDEFPRM) 3281 DRS->keep_data = -1; 3282 else 3283 DRS->keep_data = 1; 3284 /* invalidation. Invalidate only when needed, i.e. 3285 * when there are already sectors in the buffer cache 3286 * whose number will change. This is useful, because 3287 * mtools often changes the geometry of the disk after 3288 * looking at the boot block */ 3289 if (DRS->maxblock > user_params[drive].sect || 3290 DRS->maxtrack || 3291 ((user_params[drive].sect ^ oldStretch) & 3292 (FD_SWAPSIDES | FD_SECTBASEMASK))) 3293 invalidate_drive(bdev); 3294 else 3295 process_fd_request(); 3296 } 3297 return 0; 3298 } 3299 3300 /* handle obsolete ioctl's */ 3301 static unsigned int ioctl_table[] = { 3302 FDCLRPRM, 3303 FDSETPRM, 3304 FDDEFPRM, 3305 FDGETPRM, 3306 FDMSGON, 3307 FDMSGOFF, 3308 FDFMTBEG, 3309 FDFMTTRK, 3310 FDFMTEND, 3311 FDSETEMSGTRESH, 3312 FDFLUSH, 3313 FDSETMAXERRS, 3314 FDGETMAXERRS, 3315 FDGETDRVTYP, 3316 FDSETDRVPRM, 3317 FDGETDRVPRM, 3318 FDGETDRVSTAT, 3319 FDPOLLDRVSTAT, 3320 FDRESET, 3321 FDGETFDCSTAT, 3322 FDWERRORCLR, 3323 FDWERRORGET, 3324 FDRAWCMD, 3325 FDEJECT, 3326 FDTWADDLE 3327 }; 3328 3329 static int normalize_ioctl(unsigned int *cmd, int *size) 3330 { 3331 int i; 3332 3333 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { 3334 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { 3335 *size = _IOC_SIZE(*cmd); 3336 *cmd = ioctl_table[i]; 3337 if (*size > _IOC_SIZE(*cmd)) { 3338 pr_info("ioctl not yet supported\n"); 3339 return -EFAULT; 3340 } 3341 return 0; 3342 } 3343 } 3344 return -EINVAL; 3345 } 3346 3347 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) 3348 { 3349 if (type) 3350 *g = &floppy_type[type]; 3351 else { 3352 if (lock_fdc(drive)) 3353 return -EINTR; 3354 if (poll_drive(false, 0) == -EINTR) 3355 return -EINTR; 3356 process_fd_request(); 3357 *g = current_type[drive]; 3358 } 3359 if (!*g) 3360 return -ENODEV; 3361 return 0; 3362 } 3363 3364 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) 3365 { 3366 int drive = (long)bdev->bd_disk->private_data; 3367 int type = ITYPE(drive_state[drive].fd_device); 3368 struct floppy_struct *g; 3369 int ret; 3370 3371 ret = get_floppy_geometry(drive, type, &g); 3372 if (ret) 3373 return ret; 3374 3375 geo->heads = g->head; 3376 geo->sectors = g->sect; 3377 geo->cylinders = g->track; 3378 return 0; 3379 } 3380 3381 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 3382 unsigned long param) 3383 { 3384 int drive = (long)bdev->bd_disk->private_data; 3385 int type = ITYPE(UDRS->fd_device); 3386 int i; 3387 int ret; 3388 int size; 3389 union inparam { 3390 struct floppy_struct g; /* geometry */ 3391 struct format_descr f; 3392 struct floppy_max_errors max_errors; 3393 struct floppy_drive_params dp; 3394 } inparam; /* parameters coming from user space */ 3395 const void *outparam; /* parameters passed back to user space */ 3396 3397 /* convert compatibility eject ioctls into floppy eject ioctl. 3398 * We do this in order to provide a means to eject floppy disks before 3399 * installing the new fdutils package */ 3400 if (cmd == CDROMEJECT || /* CD-ROM eject */ 3401 cmd == 0x6470) { /* SunOS floppy eject */ 3402 DPRINT("obsolete eject ioctl\n"); 3403 DPRINT("please use floppycontrol --eject\n"); 3404 cmd = FDEJECT; 3405 } 3406 3407 if (!((cmd & 0xff00) == 0x0200)) 3408 return -EINVAL; 3409 3410 /* convert the old style command into a new style command */ 3411 ret = normalize_ioctl(&cmd, &size); 3412 if (ret) 3413 return ret; 3414 3415 /* permission checks */ 3416 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || 3417 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) 3418 return -EPERM; 3419 3420 if (WARN_ON(size < 0 || size > sizeof(inparam))) 3421 return -EINVAL; 3422 3423 /* copyin */ 3424 memset(&inparam, 0, sizeof(inparam)); 3425 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3426 ret = fd_copyin((void __user *)param, &inparam, size); 3427 if (ret) 3428 return ret; 3429 } 3430 3431 switch (cmd) { 3432 case FDEJECT: 3433 if (UDRS->fd_ref != 1) 3434 /* somebody else has this drive open */ 3435 return -EBUSY; 3436 if (lock_fdc(drive)) 3437 return -EINTR; 3438 3439 /* do the actual eject. Fails on 3440 * non-Sparc architectures */ 3441 ret = fd_eject(UNIT(drive)); 3442 3443 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3444 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3445 process_fd_request(); 3446 return ret; 3447 case FDCLRPRM: 3448 if (lock_fdc(drive)) 3449 return -EINTR; 3450 current_type[drive] = NULL; 3451 floppy_sizes[drive] = MAX_DISK_SIZE << 1; 3452 UDRS->keep_data = 0; 3453 return invalidate_drive(bdev); 3454 case FDSETPRM: 3455 case FDDEFPRM: 3456 return set_geometry(cmd, &inparam.g, drive, type, bdev); 3457 case FDGETPRM: 3458 ret = get_floppy_geometry(drive, type, 3459 (struct floppy_struct **)&outparam); 3460 if (ret) 3461 return ret; 3462 break; 3463 case FDMSGON: 3464 UDP->flags |= FTD_MSG; 3465 return 0; 3466 case FDMSGOFF: 3467 UDP->flags &= ~FTD_MSG; 3468 return 0; 3469 case FDFMTBEG: 3470 if (lock_fdc(drive)) 3471 return -EINTR; 3472 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3473 return -EINTR; 3474 ret = UDRS->flags; 3475 process_fd_request(); 3476 if (ret & FD_VERIFY) 3477 return -ENODEV; 3478 if (!(ret & FD_DISK_WRITABLE)) 3479 return -EROFS; 3480 return 0; 3481 case FDFMTTRK: 3482 if (UDRS->fd_ref != 1) 3483 return -EBUSY; 3484 return do_format(drive, &inparam.f); 3485 case FDFMTEND: 3486 case FDFLUSH: 3487 if (lock_fdc(drive)) 3488 return -EINTR; 3489 return invalidate_drive(bdev); 3490 case FDSETEMSGTRESH: 3491 UDP->max_errors.reporting = (unsigned short)(param & 0x0f); 3492 return 0; 3493 case FDGETMAXERRS: 3494 outparam = &UDP->max_errors; 3495 break; 3496 case FDSETMAXERRS: 3497 UDP->max_errors = inparam.max_errors; 3498 break; 3499 case FDGETDRVTYP: 3500 outparam = drive_name(type, drive); 3501 SUPBOUND(size, strlen((const char *)outparam) + 1); 3502 break; 3503 case FDSETDRVPRM: 3504 *UDP = inparam.dp; 3505 break; 3506 case FDGETDRVPRM: 3507 outparam = UDP; 3508 break; 3509 case FDPOLLDRVSTAT: 3510 if (lock_fdc(drive)) 3511 return -EINTR; 3512 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3513 return -EINTR; 3514 process_fd_request(); 3515 /* fall through */ 3516 case FDGETDRVSTAT: 3517 outparam = UDRS; 3518 break; 3519 case FDRESET: 3520 return user_reset_fdc(drive, (int)param, true); 3521 case FDGETFDCSTAT: 3522 outparam = UFDCS; 3523 break; 3524 case FDWERRORCLR: 3525 memset(UDRWE, 0, sizeof(*UDRWE)); 3526 return 0; 3527 case FDWERRORGET: 3528 outparam = UDRWE; 3529 break; 3530 case FDRAWCMD: 3531 if (type) 3532 return -EINVAL; 3533 if (lock_fdc(drive)) 3534 return -EINTR; 3535 set_floppy(drive); 3536 i = raw_cmd_ioctl(cmd, (void __user *)param); 3537 if (i == -EINTR) 3538 return -EINTR; 3539 process_fd_request(); 3540 return i; 3541 case FDTWADDLE: 3542 if (lock_fdc(drive)) 3543 return -EINTR; 3544 twaddle(); 3545 process_fd_request(); 3546 return 0; 3547 default: 3548 return -EINVAL; 3549 } 3550 3551 if (_IOC_DIR(cmd) & _IOC_READ) 3552 return fd_copyout((void __user *)param, outparam, size); 3553 3554 return 0; 3555 } 3556 3557 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 3558 unsigned int cmd, unsigned long param) 3559 { 3560 int ret; 3561 3562 mutex_lock(&floppy_mutex); 3563 ret = fd_locked_ioctl(bdev, mode, cmd, param); 3564 mutex_unlock(&floppy_mutex); 3565 3566 return ret; 3567 } 3568 3569 static void __init config_types(void) 3570 { 3571 bool has_drive = false; 3572 int drive; 3573 3574 /* read drive info out of physical CMOS */ 3575 drive = 0; 3576 if (!UDP->cmos) 3577 UDP->cmos = FLOPPY0_TYPE; 3578 drive = 1; 3579 if (!UDP->cmos && FLOPPY1_TYPE) 3580 UDP->cmos = FLOPPY1_TYPE; 3581 3582 /* FIXME: additional physical CMOS drive detection should go here */ 3583 3584 for (drive = 0; drive < N_DRIVE; drive++) { 3585 unsigned int type = UDP->cmos; 3586 struct floppy_drive_params *params; 3587 const char *name = NULL; 3588 char temparea[32]; 3589 3590 if (type < ARRAY_SIZE(default_drive_params)) { 3591 params = &default_drive_params[type].params; 3592 if (type) { 3593 name = default_drive_params[type].name; 3594 allowed_drive_mask |= 1 << drive; 3595 } else 3596 allowed_drive_mask &= ~(1 << drive); 3597 } else { 3598 params = &default_drive_params[0].params; 3599 snprintf(temparea, sizeof(temparea), 3600 "unknown type %d (usb?)", type); 3601 name = temparea; 3602 } 3603 if (name) { 3604 const char *prepend; 3605 if (!has_drive) { 3606 prepend = ""; 3607 has_drive = true; 3608 pr_info("Floppy drive(s):"); 3609 } else { 3610 prepend = ","; 3611 } 3612 3613 pr_cont("%s fd%d is %s", prepend, drive, name); 3614 } 3615 *UDP = *params; 3616 } 3617 3618 if (has_drive) 3619 pr_cont("\n"); 3620 } 3621 3622 static void floppy_release(struct gendisk *disk, fmode_t mode) 3623 { 3624 int drive = (long)disk->private_data; 3625 3626 mutex_lock(&floppy_mutex); 3627 mutex_lock(&open_lock); 3628 if (!UDRS->fd_ref--) { 3629 DPRINT("floppy_release with fd_ref == 0"); 3630 UDRS->fd_ref = 0; 3631 } 3632 if (!UDRS->fd_ref) 3633 opened_bdev[drive] = NULL; 3634 mutex_unlock(&open_lock); 3635 mutex_unlock(&floppy_mutex); 3636 } 3637 3638 /* 3639 * floppy_open check for aliasing (/dev/fd0 can be the same as 3640 * /dev/PS0 etc), and disallows simultaneous access to the same 3641 * drive with different device numbers. 3642 */ 3643 static int floppy_open(struct block_device *bdev, fmode_t mode) 3644 { 3645 int drive = (long)bdev->bd_disk->private_data; 3646 int old_dev, new_dev; 3647 int try; 3648 int res = -EBUSY; 3649 char *tmp; 3650 3651 mutex_lock(&floppy_mutex); 3652 mutex_lock(&open_lock); 3653 old_dev = UDRS->fd_device; 3654 if (opened_bdev[drive] && opened_bdev[drive] != bdev) 3655 goto out2; 3656 3657 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { 3658 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3659 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3660 } 3661 3662 UDRS->fd_ref++; 3663 3664 opened_bdev[drive] = bdev; 3665 3666 res = -ENXIO; 3667 3668 if (!floppy_track_buffer) { 3669 /* if opening an ED drive, reserve a big buffer, 3670 * else reserve a small one */ 3671 if ((UDP->cmos == 6) || (UDP->cmos == 5)) 3672 try = 64; /* Only 48 actually useful */ 3673 else 3674 try = 32; /* Only 24 actually useful */ 3675 3676 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3677 if (!tmp && !floppy_track_buffer) { 3678 try >>= 1; /* buffer only one side */ 3679 INFBOUND(try, 16); 3680 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3681 } 3682 if (!tmp && !floppy_track_buffer) 3683 fallback_on_nodma_alloc(&tmp, 2048 * try); 3684 if (!tmp && !floppy_track_buffer) { 3685 DPRINT("Unable to allocate DMA memory\n"); 3686 goto out; 3687 } 3688 if (floppy_track_buffer) { 3689 if (tmp) 3690 fd_dma_mem_free((unsigned long)tmp, try * 1024); 3691 } else { 3692 buffer_min = buffer_max = -1; 3693 floppy_track_buffer = tmp; 3694 max_buffer_sectors = try; 3695 } 3696 } 3697 3698 new_dev = MINOR(bdev->bd_dev); 3699 UDRS->fd_device = new_dev; 3700 set_capacity(disks[drive], floppy_sizes[new_dev]); 3701 if (old_dev != -1 && old_dev != new_dev) { 3702 if (buffer_drive == drive) 3703 buffer_track = -1; 3704 } 3705 3706 if (UFDCS->rawcmd == 1) 3707 UFDCS->rawcmd = 2; 3708 3709 if (!(mode & FMODE_NDELAY)) { 3710 if (mode & (FMODE_READ|FMODE_WRITE)) { 3711 UDRS->last_checked = 0; 3712 clear_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags); 3713 check_disk_change(bdev); 3714 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) 3715 goto out; 3716 if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags)) 3717 goto out; 3718 } 3719 res = -EROFS; 3720 if ((mode & FMODE_WRITE) && 3721 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) 3722 goto out; 3723 } 3724 mutex_unlock(&open_lock); 3725 mutex_unlock(&floppy_mutex); 3726 return 0; 3727 out: 3728 UDRS->fd_ref--; 3729 3730 if (!UDRS->fd_ref) 3731 opened_bdev[drive] = NULL; 3732 out2: 3733 mutex_unlock(&open_lock); 3734 mutex_unlock(&floppy_mutex); 3735 return res; 3736 } 3737 3738 /* 3739 * Check if the disk has been changed or if a change has been faked. 3740 */ 3741 static unsigned int floppy_check_events(struct gendisk *disk, 3742 unsigned int clearing) 3743 { 3744 int drive = (long)disk->private_data; 3745 3746 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3747 test_bit(FD_VERIFY_BIT, &UDRS->flags)) 3748 return DISK_EVENT_MEDIA_CHANGE; 3749 3750 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { 3751 if (lock_fdc(drive)) 3752 return -EINTR; 3753 poll_drive(false, 0); 3754 process_fd_request(); 3755 } 3756 3757 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3758 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3759 test_bit(drive, &fake_change) || 3760 drive_no_geom(drive)) 3761 return DISK_EVENT_MEDIA_CHANGE; 3762 return 0; 3763 } 3764 3765 /* 3766 * This implements "read block 0" for floppy_revalidate(). 3767 * Needed for format autodetection, checking whether there is 3768 * a disk in the drive, and whether that disk is writable. 3769 */ 3770 3771 struct rb0_cbdata { 3772 int drive; 3773 struct completion complete; 3774 }; 3775 3776 static void floppy_rb0_cb(struct bio *bio) 3777 { 3778 struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private; 3779 int drive = cbdata->drive; 3780 3781 if (bio->bi_error) { 3782 pr_info("floppy: error %d while reading block 0\n", 3783 bio->bi_error); 3784 set_bit(FD_OPEN_SHOULD_FAIL_BIT, &UDRS->flags); 3785 } 3786 complete(&cbdata->complete); 3787 } 3788 3789 static int __floppy_read_block_0(struct block_device *bdev, int drive) 3790 { 3791 struct bio bio; 3792 struct bio_vec bio_vec; 3793 struct page *page; 3794 struct rb0_cbdata cbdata; 3795 size_t size; 3796 3797 page = alloc_page(GFP_NOIO); 3798 if (!page) { 3799 process_fd_request(); 3800 return -ENOMEM; 3801 } 3802 3803 size = bdev->bd_block_size; 3804 if (!size) 3805 size = 1024; 3806 3807 cbdata.drive = drive; 3808 3809 bio_init(&bio, &bio_vec, 1); 3810 bio.bi_bdev = bdev; 3811 bio_add_page(&bio, page, size, 0); 3812 3813 bio.bi_iter.bi_sector = 0; 3814 bio.bi_flags |= (1 << BIO_QUIET); 3815 bio.bi_private = &cbdata; 3816 bio.bi_end_io = floppy_rb0_cb; 3817 bio_set_op_attrs(&bio, REQ_OP_READ, 0); 3818 3819 submit_bio(&bio); 3820 process_fd_request(); 3821 3822 init_completion(&cbdata.complete); 3823 wait_for_completion(&cbdata.complete); 3824 3825 __free_page(page); 3826 3827 return 0; 3828 } 3829 3830 /* revalidate the floppy disk, i.e. trigger format autodetection by reading 3831 * the bootblock (block 0). "Autodetection" is also needed to check whether 3832 * there is a disk in the drive at all... Thus we also do it for fixed 3833 * geometry formats */ 3834 static int floppy_revalidate(struct gendisk *disk) 3835 { 3836 int drive = (long)disk->private_data; 3837 int cf; 3838 int res = 0; 3839 3840 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3841 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3842 test_bit(drive, &fake_change) || 3843 drive_no_geom(drive)) { 3844 if (WARN(atomic_read(&usage_count) == 0, 3845 "VFS: revalidate called on non-open device.\n")) 3846 return -EFAULT; 3847 3848 res = lock_fdc(drive); 3849 if (res) 3850 return res; 3851 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3852 test_bit(FD_VERIFY_BIT, &UDRS->flags)); 3853 if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { 3854 process_fd_request(); /*already done by another thread */ 3855 return 0; 3856 } 3857 UDRS->maxblock = 0; 3858 UDRS->maxtrack = 0; 3859 if (buffer_drive == drive) 3860 buffer_track = -1; 3861 clear_bit(drive, &fake_change); 3862 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3863 if (cf) 3864 UDRS->generation++; 3865 if (drive_no_geom(drive)) { 3866 /* auto-sensing */ 3867 res = __floppy_read_block_0(opened_bdev[drive], drive); 3868 } else { 3869 if (cf) 3870 poll_drive(false, FD_RAW_NEED_DISK); 3871 process_fd_request(); 3872 } 3873 } 3874 set_capacity(disk, floppy_sizes[UDRS->fd_device]); 3875 return res; 3876 } 3877 3878 static const struct block_device_operations floppy_fops = { 3879 .owner = THIS_MODULE, 3880 .open = floppy_open, 3881 .release = floppy_release, 3882 .ioctl = fd_ioctl, 3883 .getgeo = fd_getgeo, 3884 .check_events = floppy_check_events, 3885 .revalidate_disk = floppy_revalidate, 3886 }; 3887 3888 /* 3889 * Floppy Driver initialization 3890 * ============================= 3891 */ 3892 3893 /* Determine the floppy disk controller type */ 3894 /* This routine was written by David C. Niemi */ 3895 static char __init get_fdc_version(void) 3896 { 3897 int r; 3898 3899 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ 3900 if (FDCS->reset) 3901 return FDC_NONE; 3902 r = result(); 3903 if (r <= 0x00) 3904 return FDC_NONE; /* No FDC present ??? */ 3905 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3906 pr_info("FDC %d is an 8272A\n", fdc); 3907 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ 3908 } 3909 if (r != 10) { 3910 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", 3911 fdc, r); 3912 return FDC_UNKNOWN; 3913 } 3914 3915 if (!fdc_configure()) { 3916 pr_info("FDC %d is an 82072\n", fdc); 3917 return FDC_82072; /* 82072 doesn't know CONFIGURE */ 3918 } 3919 3920 output_byte(FD_PERPENDICULAR); 3921 if (need_more_output() == MORE_OUTPUT) { 3922 output_byte(0); 3923 } else { 3924 pr_info("FDC %d is an 82072A\n", fdc); 3925 return FDC_82072A; /* 82072A as found on Sparcs. */ 3926 } 3927 3928 output_byte(FD_UNLOCK); 3929 r = result(); 3930 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3931 pr_info("FDC %d is a pre-1991 82077\n", fdc); 3932 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know 3933 * LOCK/UNLOCK */ 3934 } 3935 if ((r != 1) || (reply_buffer[0] != 0x00)) { 3936 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", 3937 fdc, r); 3938 return FDC_UNKNOWN; 3939 } 3940 output_byte(FD_PARTID); 3941 r = result(); 3942 if (r != 1) { 3943 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", 3944 fdc, r); 3945 return FDC_UNKNOWN; 3946 } 3947 if (reply_buffer[0] == 0x80) { 3948 pr_info("FDC %d is a post-1991 82077\n", fdc); 3949 return FDC_82077; /* Revised 82077AA passes all the tests */ 3950 } 3951 switch (reply_buffer[0] >> 5) { 3952 case 0x0: 3953 /* Either a 82078-1 or a 82078SL running at 5Volt */ 3954 pr_info("FDC %d is an 82078.\n", fdc); 3955 return FDC_82078; 3956 case 0x1: 3957 pr_info("FDC %d is a 44pin 82078\n", fdc); 3958 return FDC_82078; 3959 case 0x2: 3960 pr_info("FDC %d is a S82078B\n", fdc); 3961 return FDC_S82078B; 3962 case 0x3: 3963 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); 3964 return FDC_87306; 3965 default: 3966 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", 3967 fdc, reply_buffer[0] >> 5); 3968 return FDC_82078_UNKN; 3969 } 3970 } /* get_fdc_version */ 3971 3972 /* lilo configuration */ 3973 3974 static void __init floppy_set_flags(int *ints, int param, int param2) 3975 { 3976 int i; 3977 3978 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3979 if (param) 3980 default_drive_params[i].params.flags |= param2; 3981 else 3982 default_drive_params[i].params.flags &= ~param2; 3983 } 3984 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); 3985 } 3986 3987 static void __init daring(int *ints, int param, int param2) 3988 { 3989 int i; 3990 3991 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3992 if (param) { 3993 default_drive_params[i].params.select_delay = 0; 3994 default_drive_params[i].params.flags |= 3995 FD_SILENT_DCL_CLEAR; 3996 } else { 3997 default_drive_params[i].params.select_delay = 3998 2 * HZ / 100; 3999 default_drive_params[i].params.flags &= 4000 ~FD_SILENT_DCL_CLEAR; 4001 } 4002 } 4003 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); 4004 } 4005 4006 static void __init set_cmos(int *ints, int dummy, int dummy2) 4007 { 4008 int current_drive = 0; 4009 4010 if (ints[0] != 2) { 4011 DPRINT("wrong number of parameters for CMOS\n"); 4012 return; 4013 } 4014 current_drive = ints[1]; 4015 if (current_drive < 0 || current_drive >= 8) { 4016 DPRINT("bad drive for set_cmos\n"); 4017 return; 4018 } 4019 #if N_FDC > 1 4020 if (current_drive >= 4 && !FDC2) 4021 FDC2 = 0x370; 4022 #endif 4023 DP->cmos = ints[2]; 4024 DPRINT("setting CMOS code to %d\n", ints[2]); 4025 } 4026 4027 static struct param_table { 4028 const char *name; 4029 void (*fn) (int *ints, int param, int param2); 4030 int *var; 4031 int def_param; 4032 int param2; 4033 } config_params[] __initdata = { 4034 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4035 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4036 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, 4037 {"irq", NULL, &FLOPPY_IRQ, 6, 0}, 4038 {"dma", NULL, &FLOPPY_DMA, 2, 0}, 4039 {"daring", daring, NULL, 1, 0}, 4040 #if N_FDC > 1 4041 {"two_fdc", NULL, &FDC2, 0x370, 0}, 4042 {"one_fdc", NULL, &FDC2, 0, 0}, 4043 #endif 4044 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, 4045 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, 4046 {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, 4047 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, 4048 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, 4049 {"nodma", NULL, &can_use_virtual_dma, 1, 0}, 4050 {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, 4051 {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, 4052 {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, 4053 {"nofifo", NULL, &no_fifo, 0x20, 0}, 4054 {"usefifo", NULL, &no_fifo, 0, 0}, 4055 {"cmos", set_cmos, NULL, 0, 0}, 4056 {"slow", NULL, &slow_floppy, 1, 0}, 4057 {"unexpected_interrupts", NULL, &print_unex, 1, 0}, 4058 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, 4059 {"L40SX", NULL, &print_unex, 0, 0} 4060 4061 EXTRA_FLOPPY_PARAMS 4062 }; 4063 4064 static int __init floppy_setup(char *str) 4065 { 4066 int i; 4067 int param; 4068 int ints[11]; 4069 4070 str = get_options(str, ARRAY_SIZE(ints), ints); 4071 if (str) { 4072 for (i = 0; i < ARRAY_SIZE(config_params); i++) { 4073 if (strcmp(str, config_params[i].name) == 0) { 4074 if (ints[0]) 4075 param = ints[1]; 4076 else 4077 param = config_params[i].def_param; 4078 if (config_params[i].fn) 4079 config_params[i].fn(ints, param, 4080 config_params[i]. 4081 param2); 4082 if (config_params[i].var) { 4083 DPRINT("%s=%d\n", str, param); 4084 *config_params[i].var = param; 4085 } 4086 return 1; 4087 } 4088 } 4089 } 4090 if (str) { 4091 DPRINT("unknown floppy option [%s]\n", str); 4092 4093 DPRINT("allowed options are:"); 4094 for (i = 0; i < ARRAY_SIZE(config_params); i++) 4095 pr_cont(" %s", config_params[i].name); 4096 pr_cont("\n"); 4097 } else 4098 DPRINT("botched floppy option\n"); 4099 DPRINT("Read Documentation/blockdev/floppy.txt\n"); 4100 return 0; 4101 } 4102 4103 static int have_no_fdc = -ENODEV; 4104 4105 static ssize_t floppy_cmos_show(struct device *dev, 4106 struct device_attribute *attr, char *buf) 4107 { 4108 struct platform_device *p = to_platform_device(dev); 4109 int drive; 4110 4111 drive = p->id; 4112 return sprintf(buf, "%X\n", UDP->cmos); 4113 } 4114 4115 static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); 4116 4117 static struct attribute *floppy_dev_attrs[] = { 4118 &dev_attr_cmos.attr, 4119 NULL 4120 }; 4121 4122 ATTRIBUTE_GROUPS(floppy_dev); 4123 4124 static void floppy_device_release(struct device *dev) 4125 { 4126 } 4127 4128 static int floppy_resume(struct device *dev) 4129 { 4130 int fdc; 4131 4132 for (fdc = 0; fdc < N_FDC; fdc++) 4133 if (FDCS->address != -1) 4134 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4135 4136 return 0; 4137 } 4138 4139 static const struct dev_pm_ops floppy_pm_ops = { 4140 .resume = floppy_resume, 4141 .restore = floppy_resume, 4142 }; 4143 4144 static struct platform_driver floppy_driver = { 4145 .driver = { 4146 .name = "floppy", 4147 .pm = &floppy_pm_ops, 4148 }, 4149 }; 4150 4151 static struct platform_device floppy_device[N_DRIVE]; 4152 4153 static bool floppy_available(int drive) 4154 { 4155 if (!(allowed_drive_mask & (1 << drive))) 4156 return false; 4157 if (fdc_state[FDC(drive)].version == FDC_NONE) 4158 return false; 4159 return true; 4160 } 4161 4162 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 4163 { 4164 int drive = (*part & 3) | ((*part & 0x80) >> 5); 4165 if (drive >= N_DRIVE || !floppy_available(drive)) 4166 return NULL; 4167 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) 4168 return NULL; 4169 *part = 0; 4170 return get_disk(disks[drive]); 4171 } 4172 4173 static int __init do_floppy_init(void) 4174 { 4175 int i, unit, drive, err; 4176 4177 set_debugt(); 4178 interruptjiffies = resultjiffies = jiffies; 4179 4180 #if defined(CONFIG_PPC) 4181 if (check_legacy_ioport(FDC1)) 4182 return -ENODEV; 4183 #endif 4184 4185 raw_cmd = NULL; 4186 4187 floppy_wq = alloc_ordered_workqueue("floppy", 0); 4188 if (!floppy_wq) 4189 return -ENOMEM; 4190 4191 for (drive = 0; drive < N_DRIVE; drive++) { 4192 disks[drive] = alloc_disk(1); 4193 if (!disks[drive]) { 4194 err = -ENOMEM; 4195 goto out_put_disk; 4196 } 4197 4198 disks[drive]->queue = blk_init_queue(do_fd_request, &floppy_lock); 4199 if (!disks[drive]->queue) { 4200 err = -ENOMEM; 4201 goto out_put_disk; 4202 } 4203 4204 blk_queue_max_hw_sectors(disks[drive]->queue, 64); 4205 disks[drive]->major = FLOPPY_MAJOR; 4206 disks[drive]->first_minor = TOMINOR(drive); 4207 disks[drive]->fops = &floppy_fops; 4208 sprintf(disks[drive]->disk_name, "fd%d", drive); 4209 4210 init_timer(&motor_off_timer[drive]); 4211 motor_off_timer[drive].data = drive; 4212 motor_off_timer[drive].function = motor_off_callback; 4213 } 4214 4215 err = register_blkdev(FLOPPY_MAJOR, "fd"); 4216 if (err) 4217 goto out_put_disk; 4218 4219 err = platform_driver_register(&floppy_driver); 4220 if (err) 4221 goto out_unreg_blkdev; 4222 4223 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 4224 floppy_find, NULL, NULL); 4225 4226 for (i = 0; i < 256; i++) 4227 if (ITYPE(i)) 4228 floppy_sizes[i] = floppy_type[ITYPE(i)].size; 4229 else 4230 floppy_sizes[i] = MAX_DISK_SIZE << 1; 4231 4232 reschedule_timeout(MAXTIMEOUT, "floppy init"); 4233 config_types(); 4234 4235 for (i = 0; i < N_FDC; i++) { 4236 fdc = i; 4237 memset(FDCS, 0, sizeof(*FDCS)); 4238 FDCS->dtr = -1; 4239 FDCS->dor = 0x4; 4240 #if defined(__sparc__) || defined(__mc68000__) 4241 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ 4242 #ifdef __mc68000__ 4243 if (MACH_IS_SUN3X) 4244 #endif 4245 FDCS->version = FDC_82072A; 4246 #endif 4247 } 4248 4249 use_virtual_dma = can_use_virtual_dma & 1; 4250 fdc_state[0].address = FDC1; 4251 if (fdc_state[0].address == -1) { 4252 cancel_delayed_work(&fd_timeout); 4253 err = -ENODEV; 4254 goto out_unreg_region; 4255 } 4256 #if N_FDC > 1 4257 fdc_state[1].address = FDC2; 4258 #endif 4259 4260 fdc = 0; /* reset fdc in case of unexpected interrupt */ 4261 err = floppy_grab_irq_and_dma(); 4262 if (err) { 4263 cancel_delayed_work(&fd_timeout); 4264 err = -EBUSY; 4265 goto out_unreg_region; 4266 } 4267 4268 /* initialise drive state */ 4269 for (drive = 0; drive < N_DRIVE; drive++) { 4270 memset(UDRS, 0, sizeof(*UDRS)); 4271 memset(UDRWE, 0, sizeof(*UDRWE)); 4272 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 4273 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 4274 set_bit(FD_VERIFY_BIT, &UDRS->flags); 4275 UDRS->fd_device = -1; 4276 floppy_track_buffer = NULL; 4277 max_buffer_sectors = 0; 4278 } 4279 /* 4280 * Small 10 msec delay to let through any interrupt that 4281 * initialization might have triggered, to not 4282 * confuse detection: 4283 */ 4284 msleep(10); 4285 4286 for (i = 0; i < N_FDC; i++) { 4287 fdc = i; 4288 FDCS->driver_version = FD_DRIVER_VERSION; 4289 for (unit = 0; unit < 4; unit++) 4290 FDCS->track[unit] = 0; 4291 if (FDCS->address == -1) 4292 continue; 4293 FDCS->rawcmd = 2; 4294 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { 4295 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4296 floppy_release_regions(fdc); 4297 FDCS->address = -1; 4298 FDCS->version = FDC_NONE; 4299 continue; 4300 } 4301 /* Try to determine the floppy controller type */ 4302 FDCS->version = get_fdc_version(); 4303 if (FDCS->version == FDC_NONE) { 4304 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4305 floppy_release_regions(fdc); 4306 FDCS->address = -1; 4307 continue; 4308 } 4309 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) 4310 can_use_virtual_dma = 0; 4311 4312 have_no_fdc = 0; 4313 /* Not all FDCs seem to be able to handle the version command 4314 * properly, so force a reset for the standard FDC clones, 4315 * to avoid interrupt garbage. 4316 */ 4317 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4318 } 4319 fdc = 0; 4320 cancel_delayed_work(&fd_timeout); 4321 current_drive = 0; 4322 initialized = true; 4323 if (have_no_fdc) { 4324 DPRINT("no floppy controllers found\n"); 4325 err = have_no_fdc; 4326 goto out_release_dma; 4327 } 4328 4329 for (drive = 0; drive < N_DRIVE; drive++) { 4330 if (!floppy_available(drive)) 4331 continue; 4332 4333 floppy_device[drive].name = floppy_device_name; 4334 floppy_device[drive].id = drive; 4335 floppy_device[drive].dev.release = floppy_device_release; 4336 floppy_device[drive].dev.groups = floppy_dev_groups; 4337 4338 err = platform_device_register(&floppy_device[drive]); 4339 if (err) 4340 goto out_remove_drives; 4341 4342 /* to be cleaned up... */ 4343 disks[drive]->private_data = (void *)(long)drive; 4344 disks[drive]->flags |= GENHD_FL_REMOVABLE; 4345 device_add_disk(&floppy_device[drive].dev, disks[drive]); 4346 } 4347 4348 return 0; 4349 4350 out_remove_drives: 4351 while (drive--) { 4352 if (floppy_available(drive)) { 4353 del_gendisk(disks[drive]); 4354 platform_device_unregister(&floppy_device[drive]); 4355 } 4356 } 4357 out_release_dma: 4358 if (atomic_read(&usage_count)) 4359 floppy_release_irq_and_dma(); 4360 out_unreg_region: 4361 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4362 platform_driver_unregister(&floppy_driver); 4363 out_unreg_blkdev: 4364 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4365 out_put_disk: 4366 destroy_workqueue(floppy_wq); 4367 for (drive = 0; drive < N_DRIVE; drive++) { 4368 if (!disks[drive]) 4369 break; 4370 if (disks[drive]->queue) { 4371 del_timer_sync(&motor_off_timer[drive]); 4372 blk_cleanup_queue(disks[drive]->queue); 4373 disks[drive]->queue = NULL; 4374 } 4375 put_disk(disks[drive]); 4376 } 4377 return err; 4378 } 4379 4380 #ifndef MODULE 4381 static __init void floppy_async_init(void *data, async_cookie_t cookie) 4382 { 4383 do_floppy_init(); 4384 } 4385 #endif 4386 4387 static int __init floppy_init(void) 4388 { 4389 #ifdef MODULE 4390 return do_floppy_init(); 4391 #else 4392 /* Don't hold up the bootup by the floppy initialization */ 4393 async_schedule(floppy_async_init, NULL); 4394 return 0; 4395 #endif 4396 } 4397 4398 static const struct io_region { 4399 int offset; 4400 int size; 4401 } io_regions[] = { 4402 { 2, 1 }, 4403 /* address + 3 is sometimes reserved by pnp bios for motherboard */ 4404 { 4, 2 }, 4405 /* address + 6 is reserved, and may be taken by IDE. 4406 * Unfortunately, Adaptec doesn't know this :-(, */ 4407 { 7, 1 }, 4408 }; 4409 4410 static void floppy_release_allocated_regions(int fdc, const struct io_region *p) 4411 { 4412 while (p != io_regions) { 4413 p--; 4414 release_region(FDCS->address + p->offset, p->size); 4415 } 4416 } 4417 4418 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) 4419 4420 static int floppy_request_regions(int fdc) 4421 { 4422 const struct io_region *p; 4423 4424 for (p = io_regions; p < ARRAY_END(io_regions); p++) { 4425 if (!request_region(FDCS->address + p->offset, 4426 p->size, "floppy")) { 4427 DPRINT("Floppy io-port 0x%04lx in use\n", 4428 FDCS->address + p->offset); 4429 floppy_release_allocated_regions(fdc, p); 4430 return -EBUSY; 4431 } 4432 } 4433 return 0; 4434 } 4435 4436 static void floppy_release_regions(int fdc) 4437 { 4438 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); 4439 } 4440 4441 static int floppy_grab_irq_and_dma(void) 4442 { 4443 if (atomic_inc_return(&usage_count) > 1) 4444 return 0; 4445 4446 /* 4447 * We might have scheduled a free_irq(), wait it to 4448 * drain first: 4449 */ 4450 flush_workqueue(floppy_wq); 4451 4452 if (fd_request_irq()) { 4453 DPRINT("Unable to grab IRQ%d for the floppy driver\n", 4454 FLOPPY_IRQ); 4455 atomic_dec(&usage_count); 4456 return -1; 4457 } 4458 if (fd_request_dma()) { 4459 DPRINT("Unable to grab DMA%d for the floppy driver\n", 4460 FLOPPY_DMA); 4461 if (can_use_virtual_dma & 2) 4462 use_virtual_dma = can_use_virtual_dma = 1; 4463 if (!(can_use_virtual_dma & 1)) { 4464 fd_free_irq(); 4465 atomic_dec(&usage_count); 4466 return -1; 4467 } 4468 } 4469 4470 for (fdc = 0; fdc < N_FDC; fdc++) { 4471 if (FDCS->address != -1) { 4472 if (floppy_request_regions(fdc)) 4473 goto cleanup; 4474 } 4475 } 4476 for (fdc = 0; fdc < N_FDC; fdc++) { 4477 if (FDCS->address != -1) { 4478 reset_fdc_info(1); 4479 fd_outb(FDCS->dor, FD_DOR); 4480 } 4481 } 4482 fdc = 0; 4483 set_dor(0, ~0, 8); /* avoid immediate interrupt */ 4484 4485 for (fdc = 0; fdc < N_FDC; fdc++) 4486 if (FDCS->address != -1) 4487 fd_outb(FDCS->dor, FD_DOR); 4488 /* 4489 * The driver will try and free resources and relies on us 4490 * to know if they were allocated or not. 4491 */ 4492 fdc = 0; 4493 irqdma_allocated = 1; 4494 return 0; 4495 cleanup: 4496 fd_free_irq(); 4497 fd_free_dma(); 4498 while (--fdc >= 0) 4499 floppy_release_regions(fdc); 4500 atomic_dec(&usage_count); 4501 return -1; 4502 } 4503 4504 static void floppy_release_irq_and_dma(void) 4505 { 4506 int old_fdc; 4507 #ifndef __sparc__ 4508 int drive; 4509 #endif 4510 long tmpsize; 4511 unsigned long tmpaddr; 4512 4513 if (!atomic_dec_and_test(&usage_count)) 4514 return; 4515 4516 if (irqdma_allocated) { 4517 fd_disable_dma(); 4518 fd_free_dma(); 4519 fd_free_irq(); 4520 irqdma_allocated = 0; 4521 } 4522 set_dor(0, ~0, 8); 4523 #if N_FDC > 1 4524 set_dor(1, ~8, 0); 4525 #endif 4526 4527 if (floppy_track_buffer && max_buffer_sectors) { 4528 tmpsize = max_buffer_sectors * 1024; 4529 tmpaddr = (unsigned long)floppy_track_buffer; 4530 floppy_track_buffer = NULL; 4531 max_buffer_sectors = 0; 4532 buffer_min = buffer_max = -1; 4533 fd_dma_mem_free(tmpaddr, tmpsize); 4534 } 4535 #ifndef __sparc__ 4536 for (drive = 0; drive < N_FDC * 4; drive++) 4537 if (timer_pending(motor_off_timer + drive)) 4538 pr_info("motor off timer %d still active\n", drive); 4539 #endif 4540 4541 if (delayed_work_pending(&fd_timeout)) 4542 pr_info("floppy timer still active:%s\n", timeout_message); 4543 if (delayed_work_pending(&fd_timer)) 4544 pr_info("auxiliary floppy timer still active\n"); 4545 if (work_pending(&floppy_work)) 4546 pr_info("work still pending\n"); 4547 old_fdc = fdc; 4548 for (fdc = 0; fdc < N_FDC; fdc++) 4549 if (FDCS->address != -1) 4550 floppy_release_regions(fdc); 4551 fdc = old_fdc; 4552 } 4553 4554 #ifdef MODULE 4555 4556 static char *floppy; 4557 4558 static void __init parse_floppy_cfg_string(char *cfg) 4559 { 4560 char *ptr; 4561 4562 while (*cfg) { 4563 ptr = cfg; 4564 while (*cfg && *cfg != ' ' && *cfg != '\t') 4565 cfg++; 4566 if (*cfg) { 4567 *cfg = '\0'; 4568 cfg++; 4569 } 4570 if (*ptr) 4571 floppy_setup(ptr); 4572 } 4573 } 4574 4575 static int __init floppy_module_init(void) 4576 { 4577 if (floppy) 4578 parse_floppy_cfg_string(floppy); 4579 return floppy_init(); 4580 } 4581 module_init(floppy_module_init); 4582 4583 static void __exit floppy_module_exit(void) 4584 { 4585 int drive; 4586 4587 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4588 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4589 platform_driver_unregister(&floppy_driver); 4590 4591 destroy_workqueue(floppy_wq); 4592 4593 for (drive = 0; drive < N_DRIVE; drive++) { 4594 del_timer_sync(&motor_off_timer[drive]); 4595 4596 if (floppy_available(drive)) { 4597 del_gendisk(disks[drive]); 4598 platform_device_unregister(&floppy_device[drive]); 4599 } 4600 blk_cleanup_queue(disks[drive]->queue); 4601 4602 /* 4603 * These disks have not called add_disk(). Don't put down 4604 * queue reference in put_disk(). 4605 */ 4606 if (!(allowed_drive_mask & (1 << drive)) || 4607 fdc_state[FDC(drive)].version == FDC_NONE) 4608 disks[drive]->queue = NULL; 4609 4610 put_disk(disks[drive]); 4611 } 4612 4613 cancel_delayed_work_sync(&fd_timeout); 4614 cancel_delayed_work_sync(&fd_timer); 4615 4616 if (atomic_read(&usage_count)) 4617 floppy_release_irq_and_dma(); 4618 4619 /* eject disk, if any */ 4620 fd_eject(0); 4621 } 4622 4623 module_exit(floppy_module_exit); 4624 4625 module_param(floppy, charp, 0); 4626 module_param(FLOPPY_IRQ, int, 0); 4627 module_param(FLOPPY_DMA, int, 0); 4628 MODULE_AUTHOR("Alain L. Knaff"); 4629 MODULE_SUPPORTED_DEVICE("fd"); 4630 MODULE_LICENSE("GPL"); 4631 4632 /* This doesn't actually get used other than for module information */ 4633 static const struct pnp_device_id floppy_pnpids[] = { 4634 {"PNP0700", 0}, 4635 {} 4636 }; 4637 4638 MODULE_DEVICE_TABLE(pnp, floppy_pnpids); 4639 4640 #else 4641 4642 __setup("floppy=", floppy_setup); 4643 module_init(floppy_init) 4644 #endif 4645 4646 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 4647