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> 194 195 /* 196 * PS/2 floppies have much slower step rates than regular floppies. 197 * It's been recommended that take about 1/4 of the default speed 198 * in some more extreme cases. 199 */ 200 static DEFINE_MUTEX(floppy_mutex); 201 static int slow_floppy; 202 203 #include <asm/dma.h> 204 #include <asm/irq.h> 205 206 static int FLOPPY_IRQ = 6; 207 static int FLOPPY_DMA = 2; 208 static int can_use_virtual_dma = 2; 209 /* ======= 210 * can use virtual DMA: 211 * 0 = use of virtual DMA disallowed by config 212 * 1 = use of virtual DMA prescribed by config 213 * 2 = no virtual DMA preference configured. By default try hard DMA, 214 * but fall back on virtual DMA when not enough memory available 215 */ 216 217 static int use_virtual_dma; 218 /* ======= 219 * use virtual DMA 220 * 0 using hard DMA 221 * 1 using virtual DMA 222 * This variable is set to virtual when a DMA mem problem arises, and 223 * reset back in floppy_grab_irq_and_dma. 224 * It is not safe to reset it in other circumstances, because the floppy 225 * driver may have several buffers in use at once, and we do currently not 226 * record each buffers capabilities 227 */ 228 229 static DEFINE_SPINLOCK(floppy_lock); 230 231 static unsigned short virtual_dma_port = 0x3f0; 232 irqreturn_t floppy_interrupt(int irq, void *dev_id); 233 static int set_dor(int fdc, char mask, char data); 234 235 #define K_64 0x10000 /* 64KB */ 236 237 /* the following is the mask of allowed drives. By default units 2 and 238 * 3 of both floppy controllers are disabled, because switching on the 239 * motor of these drives causes system hangs on some PCI computers. drive 240 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if 241 * a drive is allowed. 242 * 243 * NOTE: This must come before we include the arch floppy header because 244 * some ports reference this variable from there. -DaveM 245 */ 246 247 static int allowed_drive_mask = 0x33; 248 249 #include <asm/floppy.h> 250 251 static int irqdma_allocated; 252 253 #include <linux/blkdev.h> 254 #include <linux/blkpg.h> 255 #include <linux/cdrom.h> /* for the compatibility eject ioctl */ 256 #include <linux/completion.h> 257 258 static struct request *current_req; 259 static void do_fd_request(struct request_queue *q); 260 static int set_next_request(void); 261 262 #ifndef fd_get_dma_residue 263 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) 264 #endif 265 266 /* Dma Memory related stuff */ 267 268 #ifndef fd_dma_mem_free 269 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) 270 #endif 271 272 #ifndef fd_dma_mem_alloc 273 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) 274 #endif 275 276 static inline void fallback_on_nodma_alloc(char **addr, size_t l) 277 { 278 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA 279 if (*addr) 280 return; /* we have the memory */ 281 if (can_use_virtual_dma != 2) 282 return; /* no fallback allowed */ 283 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); 284 *addr = (char *)nodma_mem_alloc(l); 285 #else 286 return; 287 #endif 288 } 289 290 /* End dma memory related stuff */ 291 292 static unsigned long fake_change; 293 static bool initialized; 294 295 #define ITYPE(x) (((x) >> 2) & 0x1f) 296 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) 297 #define UNIT(x) ((x) & 0x03) /* drive on fdc */ 298 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ 299 /* reverse mapping from unit and fdc to drive */ 300 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) 301 302 #define DP (&drive_params[current_drive]) 303 #define DRS (&drive_state[current_drive]) 304 #define DRWE (&write_errors[current_drive]) 305 #define FDCS (&fdc_state[fdc]) 306 307 #define UDP (&drive_params[drive]) 308 #define UDRS (&drive_state[drive]) 309 #define UDRWE (&write_errors[drive]) 310 #define UFDCS (&fdc_state[FDC(drive)]) 311 312 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) 313 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) 314 315 /* read/write */ 316 #define COMMAND (raw_cmd->cmd[0]) 317 #define DR_SELECT (raw_cmd->cmd[1]) 318 #define TRACK (raw_cmd->cmd[2]) 319 #define HEAD (raw_cmd->cmd[3]) 320 #define SECTOR (raw_cmd->cmd[4]) 321 #define SIZECODE (raw_cmd->cmd[5]) 322 #define SECT_PER_TRACK (raw_cmd->cmd[6]) 323 #define GAP (raw_cmd->cmd[7]) 324 #define SIZECODE2 (raw_cmd->cmd[8]) 325 #define NR_RW 9 326 327 /* format */ 328 #define F_SIZECODE (raw_cmd->cmd[2]) 329 #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) 330 #define F_GAP (raw_cmd->cmd[4]) 331 #define F_FILL (raw_cmd->cmd[5]) 332 #define NR_F 6 333 334 /* 335 * Maximum disk size (in kilobytes). 336 * This default is used whenever the current disk size is unknown. 337 * [Now it is rather a minimum] 338 */ 339 #define MAX_DISK_SIZE 4 /* 3984 */ 340 341 /* 342 * globals used by 'result()' 343 */ 344 #define MAX_REPLIES 16 345 static unsigned char reply_buffer[MAX_REPLIES]; 346 static int inr; /* size of reply buffer, when called from interrupt */ 347 #define ST0 (reply_buffer[0]) 348 #define ST1 (reply_buffer[1]) 349 #define ST2 (reply_buffer[2]) 350 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ 351 #define R_TRACK (reply_buffer[3]) 352 #define R_HEAD (reply_buffer[4]) 353 #define R_SECTOR (reply_buffer[5]) 354 #define R_SIZECODE (reply_buffer[6]) 355 356 #define SEL_DLY (2 * HZ / 100) 357 358 /* 359 * this struct defines the different floppy drive types. 360 */ 361 static struct { 362 struct floppy_drive_params params; 363 const char *name; /* name printed while booting */ 364 } default_drive_params[] = { 365 /* NOTE: the time values in jiffies should be in msec! 366 CMOS drive type 367 | Maximum data rate supported by drive type 368 | | Head load time, msec 369 | | | Head unload time, msec (not used) 370 | | | | Step rate interval, usec 371 | | | | | Time needed for spinup time (jiffies) 372 | | | | | | Timeout for spinning down (jiffies) 373 | | | | | | | Spindown offset (where disk stops) 374 | | | | | | | | Select delay 375 | | | | | | | | | RPS 376 | | | | | | | | | | Max number of tracks 377 | | | | | | | | | | | Interrupt timeout 378 | | | | | | | | | | | | Max nonintlv. sectors 379 | | | | | | | | | | | | | -Max Errors- flags */ 380 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, 381 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, 382 383 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, 384 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ 385 386 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, 387 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ 388 389 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 390 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ 391 392 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 393 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ 394 395 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 396 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ 397 398 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 399 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ 400 /* | --autodetected formats--- | | | 401 * read_track | | Name printed when booting 402 * | Native format 403 * Frequency of disk change checks */ 404 }; 405 406 static struct floppy_drive_params drive_params[N_DRIVE]; 407 static struct floppy_drive_struct drive_state[N_DRIVE]; 408 static struct floppy_write_errors write_errors[N_DRIVE]; 409 static struct timer_list motor_off_timer[N_DRIVE]; 410 static struct gendisk *disks[N_DRIVE]; 411 static struct block_device *opened_bdev[N_DRIVE]; 412 static DEFINE_MUTEX(open_lock); 413 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; 414 static int fdc_queue; 415 416 /* 417 * This struct defines the different floppy types. 418 * 419 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some 420 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' 421 * tells if the disk is in Commodore 1581 format, which means side 0 sectors 422 * are located on side 1 of the disk but with a side 0 ID, and vice-versa. 423 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the 424 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical 425 * side 0 is on physical side 0 (but with the misnamed sector IDs). 426 * 'stretch' should probably be renamed to something more general, like 427 * 'options'. 428 * 429 * Bits 2 through 9 of 'stretch' tell the number of the first sector. 430 * The LSB (bit 2) is flipped. For most disks, the first sector 431 * is 1 (represented by 0x00<<2). For some CP/M and music sampler 432 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). 433 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). 434 * 435 * Other parameters should be self-explanatory (see also setfdprm(8)). 436 */ 437 /* 438 Size 439 | Sectors per track 440 | | Head 441 | | | Tracks 442 | | | | Stretch 443 | | | | | Gap 1 size 444 | | | | | | Data rate, | 0x40 for perp 445 | | | | | | | Spec1 (stepping rate, head unload 446 | | | | | | | | /fmt gap (gap2) */ 447 static struct floppy_struct floppy_type[32] = { 448 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ 449 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ 450 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ 451 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ 452 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ 453 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ 454 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ 455 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ 456 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ 457 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ 458 459 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ 460 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ 461 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ 462 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ 463 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ 464 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ 465 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ 466 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ 467 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ 468 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ 469 470 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ 471 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ 472 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ 473 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ 474 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ 475 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ 476 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ 477 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ 478 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ 479 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ 480 481 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ 482 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ 483 }; 484 485 #define SECTSIZE (_FD_SECTSIZE(*floppy)) 486 487 /* Auto-detection: Disk type used until the next media change occurs. */ 488 static struct floppy_struct *current_type[N_DRIVE]; 489 490 /* 491 * User-provided type information. current_type points to 492 * the respective entry of this array. 493 */ 494 static struct floppy_struct user_params[N_DRIVE]; 495 496 static sector_t floppy_sizes[256]; 497 498 static char floppy_device_name[] = "floppy"; 499 500 /* 501 * The driver is trying to determine the correct media format 502 * while probing is set. rw_interrupt() clears it after a 503 * successful access. 504 */ 505 static int probing; 506 507 /* Synchronization of FDC access. */ 508 #define FD_COMMAND_NONE -1 509 #define FD_COMMAND_ERROR 2 510 #define FD_COMMAND_OKAY 3 511 512 static volatile int command_status = FD_COMMAND_NONE; 513 static unsigned long fdc_busy; 514 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); 515 static DECLARE_WAIT_QUEUE_HEAD(command_done); 516 517 /* Errors during formatting are counted here. */ 518 static int format_errors; 519 520 /* Format request descriptor. */ 521 static struct format_descr format_req; 522 523 /* 524 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps 525 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), 526 * H is head unload time (1=16ms, 2=32ms, etc) 527 */ 528 529 /* 530 * Track buffer 531 * Because these are written to by the DMA controller, they must 532 * not contain a 64k byte boundary crossing, or data will be 533 * corrupted/lost. 534 */ 535 static char *floppy_track_buffer; 536 static int max_buffer_sectors; 537 538 static int *errors; 539 typedef void (*done_f)(int); 540 static const struct cont_t { 541 void (*interrupt)(void); 542 /* this is called after the interrupt of the 543 * main command */ 544 void (*redo)(void); /* this is called to retry the operation */ 545 void (*error)(void); /* this is called to tally an error */ 546 done_f done; /* this is called to say if the operation has 547 * succeeded/failed */ 548 } *cont; 549 550 static void floppy_ready(void); 551 static void floppy_start(void); 552 static void process_fd_request(void); 553 static void recalibrate_floppy(void); 554 static void floppy_shutdown(unsigned long); 555 556 static int floppy_request_regions(int); 557 static void floppy_release_regions(int); 558 static int floppy_grab_irq_and_dma(void); 559 static void floppy_release_irq_and_dma(void); 560 561 /* 562 * The "reset" variable should be tested whenever an interrupt is scheduled, 563 * after the commands have been sent. This is to ensure that the driver doesn't 564 * get wedged when the interrupt doesn't come because of a failed command. 565 * reset doesn't need to be tested before sending commands, because 566 * output_byte is automatically disabled when reset is set. 567 */ 568 static void reset_fdc(void); 569 570 /* 571 * These are global variables, as that's the easiest way to give 572 * information to interrupts. They are the data used for the current 573 * request. 574 */ 575 #define NO_TRACK -1 576 #define NEED_1_RECAL -2 577 #define NEED_2_RECAL -3 578 579 static atomic_t usage_count = ATOMIC_INIT(0); 580 581 /* buffer related variables */ 582 static int buffer_track = -1; 583 static int buffer_drive = -1; 584 static int buffer_min = -1; 585 static int buffer_max = -1; 586 587 /* fdc related variables, should end up in a struct */ 588 static struct floppy_fdc_state fdc_state[N_FDC]; 589 static int fdc; /* current fdc */ 590 591 static struct floppy_struct *_floppy = floppy_type; 592 static unsigned char current_drive; 593 static long current_count_sectors; 594 static unsigned char fsector_t; /* sector in track */ 595 static unsigned char in_sector_offset; /* offset within physical sector, 596 * expressed in units of 512 bytes */ 597 598 static inline bool drive_no_geom(int drive) 599 { 600 return !current_type[drive] && !ITYPE(UDRS->fd_device); 601 } 602 603 #ifndef fd_eject 604 static inline int fd_eject(int drive) 605 { 606 return -EINVAL; 607 } 608 #endif 609 610 /* 611 * Debugging 612 * ========= 613 */ 614 #ifdef DEBUGT 615 static long unsigned debugtimer; 616 617 static inline void set_debugt(void) 618 { 619 debugtimer = jiffies; 620 } 621 622 static inline void debugt(const char *func, const char *msg) 623 { 624 if (DP->flags & DEBUGT) 625 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); 626 } 627 #else 628 static inline void set_debugt(void) { } 629 static inline void debugt(const char *func, const char *msg) { } 630 #endif /* DEBUGT */ 631 632 typedef void (*timeout_fn)(unsigned long); 633 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); 634 635 static const char *timeout_message; 636 637 static void is_alive(const char *func, const char *message) 638 { 639 /* this routine checks whether the floppy driver is "alive" */ 640 if (test_bit(0, &fdc_busy) && command_status < 2 && 641 !timer_pending(&fd_timeout)) { 642 DPRINT("%s: timeout handler died. %s\n", func, message); 643 } 644 } 645 646 static void (*do_floppy)(void) = NULL; 647 648 #define OLOGSIZE 20 649 650 static void (*lasthandler)(void); 651 static unsigned long interruptjiffies; 652 static unsigned long resultjiffies; 653 static int resultsize; 654 static unsigned long lastredo; 655 656 static struct output_log { 657 unsigned char data; 658 unsigned char status; 659 unsigned long jiffies; 660 } output_log[OLOGSIZE]; 661 662 static int output_log_pos; 663 664 #define current_reqD -1 665 #define MAXTIMEOUT -2 666 667 static void __reschedule_timeout(int drive, const char *message) 668 { 669 if (drive == current_reqD) 670 drive = current_drive; 671 del_timer(&fd_timeout); 672 if (drive < 0 || drive >= N_DRIVE) { 673 fd_timeout.expires = jiffies + 20UL * HZ; 674 drive = 0; 675 } else 676 fd_timeout.expires = jiffies + UDP->timeout; 677 add_timer(&fd_timeout); 678 if (UDP->flags & FD_DEBUG) 679 DPRINT("reschedule timeout %s\n", message); 680 timeout_message = message; 681 } 682 683 static void reschedule_timeout(int drive, const char *message) 684 { 685 unsigned long flags; 686 687 spin_lock_irqsave(&floppy_lock, flags); 688 __reschedule_timeout(drive, message); 689 spin_unlock_irqrestore(&floppy_lock, flags); 690 } 691 692 #define INFBOUND(a, b) (a) = max_t(int, a, b) 693 #define SUPBOUND(a, b) (a) = min_t(int, a, b) 694 695 /* 696 * Bottom half floppy driver. 697 * ========================== 698 * 699 * This part of the file contains the code talking directly to the hardware, 700 * and also the main service loop (seek-configure-spinup-command) 701 */ 702 703 /* 704 * disk change. 705 * This routine is responsible for maintaining the FD_DISK_CHANGE flag, 706 * and the last_checked date. 707 * 708 * last_checked is the date of the last check which showed 'no disk change' 709 * FD_DISK_CHANGE is set under two conditions: 710 * 1. The floppy has been changed after some i/o to that floppy already 711 * took place. 712 * 2. No floppy disk is in the drive. This is done in order to ensure that 713 * requests are quickly flushed in case there is no disk in the drive. It 714 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in 715 * the drive. 716 * 717 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. 718 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on 719 * each seek. If a disk is present, the disk change line should also be 720 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk 721 * change line is set, this means either that no disk is in the drive, or 722 * that it has been removed since the last seek. 723 * 724 * This means that we really have a third possibility too: 725 * The floppy has been changed after the last seek. 726 */ 727 728 static int disk_change(int drive) 729 { 730 int fdc = FDC(drive); 731 732 if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) 733 DPRINT("WARNING disk change called early\n"); 734 if (!(FDCS->dor & (0x10 << UNIT(drive))) || 735 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { 736 DPRINT("probing disk change on unselected drive\n"); 737 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), 738 (unsigned int)FDCS->dor); 739 } 740 741 debug_dcl(UDP->flags, 742 "checking disk change line for drive %d\n", drive); 743 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); 744 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); 745 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); 746 747 if (UDP->flags & FD_BROKEN_DCL) 748 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 749 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { 750 set_bit(FD_VERIFY_BIT, &UDRS->flags); 751 /* verify write protection */ 752 753 if (UDRS->maxblock) /* mark it changed */ 754 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 755 756 /* invalidate its geometry */ 757 if (UDRS->keep_data >= 0) { 758 if ((UDP->flags & FTD_MSG) && 759 current_type[drive] != NULL) 760 DPRINT("Disk type is undefined after disk change\n"); 761 current_type[drive] = NULL; 762 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; 763 } 764 765 return 1; 766 } else { 767 UDRS->last_checked = jiffies; 768 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 769 } 770 return 0; 771 } 772 773 static inline int is_selected(int dor, int unit) 774 { 775 return ((dor & (0x10 << unit)) && (dor & 3) == unit); 776 } 777 778 static bool is_ready_state(int status) 779 { 780 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); 781 return state == STATUS_READY; 782 } 783 784 static int set_dor(int fdc, char mask, char data) 785 { 786 unsigned char unit; 787 unsigned char drive; 788 unsigned char newdor; 789 unsigned char olddor; 790 791 if (FDCS->address == -1) 792 return -1; 793 794 olddor = FDCS->dor; 795 newdor = (olddor & mask) | data; 796 if (newdor != olddor) { 797 unit = olddor & 0x3; 798 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { 799 drive = REVDRIVE(fdc, unit); 800 debug_dcl(UDP->flags, 801 "calling disk change from set_dor\n"); 802 disk_change(drive); 803 } 804 FDCS->dor = newdor; 805 fd_outb(newdor, FD_DOR); 806 807 unit = newdor & 0x3; 808 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { 809 drive = REVDRIVE(fdc, unit); 810 UDRS->select_date = jiffies; 811 } 812 } 813 return olddor; 814 } 815 816 static void twaddle(void) 817 { 818 if (DP->select_delay) 819 return; 820 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); 821 fd_outb(FDCS->dor, FD_DOR); 822 DRS->select_date = jiffies; 823 } 824 825 /* 826 * Reset all driver information about the current fdc. 827 * This is needed after a reset, and after a raw command. 828 */ 829 static void reset_fdc_info(int mode) 830 { 831 int drive; 832 833 FDCS->spec1 = FDCS->spec2 = -1; 834 FDCS->need_configure = 1; 835 FDCS->perp_mode = 1; 836 FDCS->rawcmd = 0; 837 for (drive = 0; drive < N_DRIVE; drive++) 838 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) 839 UDRS->track = NEED_2_RECAL; 840 } 841 842 /* selects the fdc and drive, and enables the fdc's input/dma. */ 843 static void set_fdc(int drive) 844 { 845 if (drive >= 0 && drive < N_DRIVE) { 846 fdc = FDC(drive); 847 current_drive = drive; 848 } 849 if (fdc != 1 && fdc != 0) { 850 pr_info("bad fdc value\n"); 851 return; 852 } 853 set_dor(fdc, ~0, 8); 854 #if N_FDC > 1 855 set_dor(1 - fdc, ~8, 0); 856 #endif 857 if (FDCS->rawcmd == 2) 858 reset_fdc_info(1); 859 if (fd_inb(FD_STATUS) != STATUS_READY) 860 FDCS->reset = 1; 861 } 862 863 /* locks the driver */ 864 static int lock_fdc(int drive, bool interruptible) 865 { 866 if (WARN(atomic_read(&usage_count) == 0, 867 "Trying to lock fdc while usage count=0\n")) 868 return -1; 869 870 if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) 871 return -EINTR; 872 873 command_status = FD_COMMAND_NONE; 874 875 __reschedule_timeout(drive, "lock fdc"); 876 set_fdc(drive); 877 return 0; 878 } 879 880 /* unlocks the driver */ 881 static void unlock_fdc(void) 882 { 883 unsigned long flags; 884 885 raw_cmd = NULL; 886 if (!test_bit(0, &fdc_busy)) 887 DPRINT("FDC access conflict!\n"); 888 889 if (do_floppy) 890 DPRINT("device interrupt still active at FDC release: %pf!\n", 891 do_floppy); 892 command_status = FD_COMMAND_NONE; 893 spin_lock_irqsave(&floppy_lock, flags); 894 del_timer(&fd_timeout); 895 cont = NULL; 896 clear_bit(0, &fdc_busy); 897 if (current_req || set_next_request()) 898 do_fd_request(current_req->q); 899 spin_unlock_irqrestore(&floppy_lock, flags); 900 wake_up(&fdc_wait); 901 } 902 903 /* switches the motor off after a given timeout */ 904 static void motor_off_callback(unsigned long nr) 905 { 906 unsigned char mask = ~(0x10 << UNIT(nr)); 907 908 set_dor(FDC(nr), mask, 0); 909 } 910 911 /* schedules motor off */ 912 static void floppy_off(unsigned int drive) 913 { 914 unsigned long volatile delta; 915 int fdc = FDC(drive); 916 917 if (!(FDCS->dor & (0x10 << UNIT(drive)))) 918 return; 919 920 del_timer(motor_off_timer + drive); 921 922 /* make spindle stop in a position which minimizes spinup time 923 * next time */ 924 if (UDP->rps) { 925 delta = jiffies - UDRS->first_read_date + HZ - 926 UDP->spindown_offset; 927 delta = ((delta * UDP->rps) % HZ) / UDP->rps; 928 motor_off_timer[drive].expires = 929 jiffies + UDP->spindown - delta; 930 } 931 add_timer(motor_off_timer + drive); 932 } 933 934 /* 935 * cycle through all N_DRIVE floppy drives, for disk change testing. 936 * stopping at current drive. This is done before any long operation, to 937 * be sure to have up to date disk change information. 938 */ 939 static void scandrives(void) 940 { 941 int i; 942 int drive; 943 int saved_drive; 944 945 if (DP->select_delay) 946 return; 947 948 saved_drive = current_drive; 949 for (i = 0; i < N_DRIVE; i++) { 950 drive = (saved_drive + i + 1) % N_DRIVE; 951 if (UDRS->fd_ref == 0 || UDP->select_delay != 0) 952 continue; /* skip closed drives */ 953 set_fdc(drive); 954 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & 955 (0x10 << UNIT(drive)))) 956 /* switch the motor off again, if it was off to 957 * begin with */ 958 set_dor(fdc, ~(0x10 << UNIT(drive)), 0); 959 } 960 set_fdc(saved_drive); 961 } 962 963 static void empty(void) 964 { 965 } 966 967 static DECLARE_WORK(floppy_work, NULL); 968 969 static void schedule_bh(void (*handler)(void)) 970 { 971 PREPARE_WORK(&floppy_work, (work_func_t)handler); 972 schedule_work(&floppy_work); 973 } 974 975 static DEFINE_TIMER(fd_timer, NULL, 0, 0); 976 977 static void cancel_activity(void) 978 { 979 unsigned long flags; 980 981 spin_lock_irqsave(&floppy_lock, flags); 982 do_floppy = NULL; 983 PREPARE_WORK(&floppy_work, (work_func_t)empty); 984 del_timer(&fd_timer); 985 spin_unlock_irqrestore(&floppy_lock, flags); 986 } 987 988 /* this function makes sure that the disk stays in the drive during the 989 * transfer */ 990 static void fd_watchdog(void) 991 { 992 debug_dcl(DP->flags, "calling disk change from watchdog\n"); 993 994 if (disk_change(current_drive)) { 995 DPRINT("disk removed during i/o\n"); 996 cancel_activity(); 997 cont->done(0); 998 reset_fdc(); 999 } else { 1000 del_timer(&fd_timer); 1001 fd_timer.function = (timeout_fn)fd_watchdog; 1002 fd_timer.expires = jiffies + HZ / 10; 1003 add_timer(&fd_timer); 1004 } 1005 } 1006 1007 static void main_command_interrupt(void) 1008 { 1009 del_timer(&fd_timer); 1010 cont->interrupt(); 1011 } 1012 1013 /* waits for a delay (spinup or select) to pass */ 1014 static int fd_wait_for_completion(unsigned long delay, timeout_fn function) 1015 { 1016 if (FDCS->reset) { 1017 reset_fdc(); /* do the reset during sleep to win time 1018 * if we don't need to sleep, it's a good 1019 * occasion anyways */ 1020 return 1; 1021 } 1022 1023 if (time_before(jiffies, delay)) { 1024 del_timer(&fd_timer); 1025 fd_timer.function = function; 1026 fd_timer.expires = delay; 1027 add_timer(&fd_timer); 1028 return 1; 1029 } 1030 return 0; 1031 } 1032 1033 static void setup_DMA(void) 1034 { 1035 unsigned long f; 1036 1037 if (raw_cmd->length == 0) { 1038 int i; 1039 1040 pr_info("zero dma transfer size:"); 1041 for (i = 0; i < raw_cmd->cmd_count; i++) 1042 pr_cont("%x,", raw_cmd->cmd[i]); 1043 pr_cont("\n"); 1044 cont->done(0); 1045 FDCS->reset = 1; 1046 return; 1047 } 1048 if (((unsigned long)raw_cmd->kernel_data) % 512) { 1049 pr_info("non aligned address: %p\n", raw_cmd->kernel_data); 1050 cont->done(0); 1051 FDCS->reset = 1; 1052 return; 1053 } 1054 f = claim_dma_lock(); 1055 fd_disable_dma(); 1056 #ifdef fd_dma_setup 1057 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, 1058 (raw_cmd->flags & FD_RAW_READ) ? 1059 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { 1060 release_dma_lock(f); 1061 cont->done(0); 1062 FDCS->reset = 1; 1063 return; 1064 } 1065 release_dma_lock(f); 1066 #else 1067 fd_clear_dma_ff(); 1068 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); 1069 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? 1070 DMA_MODE_READ : DMA_MODE_WRITE); 1071 fd_set_dma_addr(raw_cmd->kernel_data); 1072 fd_set_dma_count(raw_cmd->length); 1073 virtual_dma_port = FDCS->address; 1074 fd_enable_dma(); 1075 release_dma_lock(f); 1076 #endif 1077 } 1078 1079 static void show_floppy(void); 1080 1081 /* waits until the fdc becomes ready */ 1082 static int wait_til_ready(void) 1083 { 1084 int status; 1085 int counter; 1086 1087 if (FDCS->reset) 1088 return -1; 1089 for (counter = 0; counter < 10000; counter++) { 1090 status = fd_inb(FD_STATUS); 1091 if (status & STATUS_READY) 1092 return status; 1093 } 1094 if (initialized) { 1095 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); 1096 show_floppy(); 1097 } 1098 FDCS->reset = 1; 1099 return -1; 1100 } 1101 1102 /* sends a command byte to the fdc */ 1103 static int output_byte(char byte) 1104 { 1105 int status = wait_til_ready(); 1106 1107 if (status < 0) 1108 return -1; 1109 1110 if (is_ready_state(status)) { 1111 fd_outb(byte, FD_DATA); 1112 output_log[output_log_pos].data = byte; 1113 output_log[output_log_pos].status = status; 1114 output_log[output_log_pos].jiffies = jiffies; 1115 output_log_pos = (output_log_pos + 1) % OLOGSIZE; 1116 return 0; 1117 } 1118 FDCS->reset = 1; 1119 if (initialized) { 1120 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", 1121 byte, fdc, status); 1122 show_floppy(); 1123 } 1124 return -1; 1125 } 1126 1127 /* gets the response from the fdc */ 1128 static int result(void) 1129 { 1130 int i; 1131 int status = 0; 1132 1133 for (i = 0; i < MAX_REPLIES; i++) { 1134 status = wait_til_ready(); 1135 if (status < 0) 1136 break; 1137 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; 1138 if ((status & ~STATUS_BUSY) == STATUS_READY) { 1139 resultjiffies = jiffies; 1140 resultsize = i; 1141 return i; 1142 } 1143 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) 1144 reply_buffer[i] = fd_inb(FD_DATA); 1145 else 1146 break; 1147 } 1148 if (initialized) { 1149 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", 1150 fdc, status, i); 1151 show_floppy(); 1152 } 1153 FDCS->reset = 1; 1154 return -1; 1155 } 1156 1157 #define MORE_OUTPUT -2 1158 /* does the fdc need more output? */ 1159 static int need_more_output(void) 1160 { 1161 int status = wait_til_ready(); 1162 1163 if (status < 0) 1164 return -1; 1165 1166 if (is_ready_state(status)) 1167 return MORE_OUTPUT; 1168 1169 return result(); 1170 } 1171 1172 /* Set perpendicular mode as required, based on data rate, if supported. 1173 * 82077 Now tested. 1Mbps data rate only possible with 82077-1. 1174 */ 1175 static void perpendicular_mode(void) 1176 { 1177 unsigned char perp_mode; 1178 1179 if (raw_cmd->rate & 0x40) { 1180 switch (raw_cmd->rate & 3) { 1181 case 0: 1182 perp_mode = 2; 1183 break; 1184 case 3: 1185 perp_mode = 3; 1186 break; 1187 default: 1188 DPRINT("Invalid data rate for perpendicular mode!\n"); 1189 cont->done(0); 1190 FDCS->reset = 1; 1191 /* 1192 * convenient way to return to 1193 * redo without too much hassle 1194 * (deep stack et al.) 1195 */ 1196 return; 1197 } 1198 } else 1199 perp_mode = 0; 1200 1201 if (FDCS->perp_mode == perp_mode) 1202 return; 1203 if (FDCS->version >= FDC_82077_ORIG) { 1204 output_byte(FD_PERPENDICULAR); 1205 output_byte(perp_mode); 1206 FDCS->perp_mode = perp_mode; 1207 } else if (perp_mode) { 1208 DPRINT("perpendicular mode not supported by this FDC.\n"); 1209 } 1210 } /* perpendicular_mode */ 1211 1212 static int fifo_depth = 0xa; 1213 static int no_fifo; 1214 1215 static int fdc_configure(void) 1216 { 1217 /* Turn on FIFO */ 1218 output_byte(FD_CONFIGURE); 1219 if (need_more_output() != MORE_OUTPUT) 1220 return 0; 1221 output_byte(0); 1222 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); 1223 output_byte(0); /* pre-compensation from track 1224 0 upwards */ 1225 return 1; 1226 } 1227 1228 #define NOMINAL_DTR 500 1229 1230 /* Issue a "SPECIFY" command to set the step rate time, head unload time, 1231 * head load time, and DMA disable flag to values needed by floppy. 1232 * 1233 * The value "dtr" is the data transfer rate in Kbps. It is needed 1234 * to account for the data rate-based scaling done by the 82072 and 82077 1235 * FDC types. This parameter is ignored for other types of FDCs (i.e. 1236 * 8272a). 1237 * 1238 * Note that changing the data transfer rate has a (probably deleterious) 1239 * effect on the parameters subject to scaling for 82072/82077 FDCs, so 1240 * fdc_specify is called again after each data transfer rate 1241 * change. 1242 * 1243 * srt: 1000 to 16000 in microseconds 1244 * hut: 16 to 240 milliseconds 1245 * hlt: 2 to 254 milliseconds 1246 * 1247 * These values are rounded up to the next highest available delay time. 1248 */ 1249 static void fdc_specify(void) 1250 { 1251 unsigned char spec1; 1252 unsigned char spec2; 1253 unsigned long srt; 1254 unsigned long hlt; 1255 unsigned long hut; 1256 unsigned long dtr = NOMINAL_DTR; 1257 unsigned long scale_dtr = NOMINAL_DTR; 1258 int hlt_max_code = 0x7f; 1259 int hut_max_code = 0xf; 1260 1261 if (FDCS->need_configure && FDCS->version >= FDC_82072A) { 1262 fdc_configure(); 1263 FDCS->need_configure = 0; 1264 } 1265 1266 switch (raw_cmd->rate & 0x03) { 1267 case 3: 1268 dtr = 1000; 1269 break; 1270 case 1: 1271 dtr = 300; 1272 if (FDCS->version >= FDC_82078) { 1273 /* chose the default rate table, not the one 1274 * where 1 = 2 Mbps */ 1275 output_byte(FD_DRIVESPEC); 1276 if (need_more_output() == MORE_OUTPUT) { 1277 output_byte(UNIT(current_drive)); 1278 output_byte(0xc0); 1279 } 1280 } 1281 break; 1282 case 2: 1283 dtr = 250; 1284 break; 1285 } 1286 1287 if (FDCS->version >= FDC_82072) { 1288 scale_dtr = dtr; 1289 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ 1290 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ 1291 } 1292 1293 /* Convert step rate from microseconds to milliseconds and 4 bits */ 1294 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); 1295 if (slow_floppy) 1296 srt = srt / 4; 1297 1298 SUPBOUND(srt, 0xf); 1299 INFBOUND(srt, 0); 1300 1301 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); 1302 if (hlt < 0x01) 1303 hlt = 0x01; 1304 else if (hlt > 0x7f) 1305 hlt = hlt_max_code; 1306 1307 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); 1308 if (hut < 0x1) 1309 hut = 0x1; 1310 else if (hut > 0xf) 1311 hut = hut_max_code; 1312 1313 spec1 = (srt << 4) | hut; 1314 spec2 = (hlt << 1) | (use_virtual_dma & 1); 1315 1316 /* If these parameters did not change, just return with success */ 1317 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { 1318 /* Go ahead and set spec1 and spec2 */ 1319 output_byte(FD_SPECIFY); 1320 output_byte(FDCS->spec1 = spec1); 1321 output_byte(FDCS->spec2 = spec2); 1322 } 1323 } /* fdc_specify */ 1324 1325 /* Set the FDC's data transfer rate on behalf of the specified drive. 1326 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue 1327 * of the specify command (i.e. using the fdc_specify function). 1328 */ 1329 static int fdc_dtr(void) 1330 { 1331 /* If data rate not already set to desired value, set it. */ 1332 if ((raw_cmd->rate & 3) == FDCS->dtr) 1333 return 0; 1334 1335 /* Set dtr */ 1336 fd_outb(raw_cmd->rate & 3, FD_DCR); 1337 1338 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) 1339 * need a stabilization period of several milliseconds to be 1340 * enforced after data rate changes before R/W operations. 1341 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) 1342 */ 1343 FDCS->dtr = raw_cmd->rate & 3; 1344 return fd_wait_for_completion(jiffies + 2UL * HZ / 100, 1345 (timeout_fn)floppy_ready); 1346 } /* fdc_dtr */ 1347 1348 static void tell_sector(void) 1349 { 1350 pr_cont(": track %d, head %d, sector %d, size %d", 1351 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); 1352 } /* tell_sector */ 1353 1354 static void print_errors(void) 1355 { 1356 DPRINT(""); 1357 if (ST0 & ST0_ECE) { 1358 pr_cont("Recalibrate failed!"); 1359 } else if (ST2 & ST2_CRC) { 1360 pr_cont("data CRC error"); 1361 tell_sector(); 1362 } else if (ST1 & ST1_CRC) { 1363 pr_cont("CRC error"); 1364 tell_sector(); 1365 } else if ((ST1 & (ST1_MAM | ST1_ND)) || 1366 (ST2 & ST2_MAM)) { 1367 if (!probing) { 1368 pr_cont("sector not found"); 1369 tell_sector(); 1370 } else 1371 pr_cont("probe failed..."); 1372 } else if (ST2 & ST2_WC) { /* seek error */ 1373 pr_cont("wrong cylinder"); 1374 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ 1375 pr_cont("bad cylinder"); 1376 } else { 1377 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", 1378 ST0, ST1, ST2); 1379 tell_sector(); 1380 } 1381 pr_cont("\n"); 1382 } 1383 1384 /* 1385 * OK, this error interpreting routine is called after a 1386 * DMA read/write has succeeded 1387 * or failed, so we check the results, and copy any buffers. 1388 * hhb: Added better error reporting. 1389 * ak: Made this into a separate routine. 1390 */ 1391 static int interpret_errors(void) 1392 { 1393 char bad; 1394 1395 if (inr != 7) { 1396 DPRINT("-- FDC reply error\n"); 1397 FDCS->reset = 1; 1398 return 1; 1399 } 1400 1401 /* check IC to find cause of interrupt */ 1402 switch (ST0 & ST0_INTR) { 1403 case 0x40: /* error occurred during command execution */ 1404 if (ST1 & ST1_EOC) 1405 return 0; /* occurs with pseudo-DMA */ 1406 bad = 1; 1407 if (ST1 & ST1_WP) { 1408 DPRINT("Drive is write protected\n"); 1409 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1410 cont->done(0); 1411 bad = 2; 1412 } else if (ST1 & ST1_ND) { 1413 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1414 } else if (ST1 & ST1_OR) { 1415 if (DP->flags & FTD_MSG) 1416 DPRINT("Over/Underrun - retrying\n"); 1417 bad = 0; 1418 } else if (*errors >= DP->max_errors.reporting) { 1419 print_errors(); 1420 } 1421 if (ST2 & ST2_WC || ST2 & ST2_BC) 1422 /* wrong cylinder => recal */ 1423 DRS->track = NEED_2_RECAL; 1424 return bad; 1425 case 0x80: /* invalid command given */ 1426 DPRINT("Invalid FDC command given!\n"); 1427 cont->done(0); 1428 return 2; 1429 case 0xc0: 1430 DPRINT("Abnormal termination caused by polling\n"); 1431 cont->error(); 1432 return 2; 1433 default: /* (0) Normal command termination */ 1434 return 0; 1435 } 1436 } 1437 1438 /* 1439 * This routine is called when everything should be correctly set up 1440 * for the transfer (i.e. floppy motor is on, the correct floppy is 1441 * selected, and the head is sitting on the right track). 1442 */ 1443 static void setup_rw_floppy(void) 1444 { 1445 int i; 1446 int r; 1447 int flags; 1448 int dflags; 1449 unsigned long ready_date; 1450 timeout_fn function; 1451 1452 flags = raw_cmd->flags; 1453 if (flags & (FD_RAW_READ | FD_RAW_WRITE)) 1454 flags |= FD_RAW_INTR; 1455 1456 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { 1457 ready_date = DRS->spinup_date + DP->spinup; 1458 /* If spinup will take a long time, rerun scandrives 1459 * again just before spinup completion. Beware that 1460 * after scandrives, we must again wait for selection. 1461 */ 1462 if (time_after(ready_date, jiffies + DP->select_delay)) { 1463 ready_date -= DP->select_delay; 1464 function = (timeout_fn)floppy_start; 1465 } else 1466 function = (timeout_fn)setup_rw_floppy; 1467 1468 /* wait until the floppy is spinning fast enough */ 1469 if (fd_wait_for_completion(ready_date, function)) 1470 return; 1471 } 1472 dflags = DRS->flags; 1473 1474 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) 1475 setup_DMA(); 1476 1477 if (flags & FD_RAW_INTR) 1478 do_floppy = main_command_interrupt; 1479 1480 r = 0; 1481 for (i = 0; i < raw_cmd->cmd_count; i++) 1482 r |= output_byte(raw_cmd->cmd[i]); 1483 1484 debugt(__func__, "rw_command"); 1485 1486 if (r) { 1487 cont->error(); 1488 reset_fdc(); 1489 return; 1490 } 1491 1492 if (!(flags & FD_RAW_INTR)) { 1493 inr = result(); 1494 cont->interrupt(); 1495 } else if (flags & FD_RAW_NEED_DISK) 1496 fd_watchdog(); 1497 } 1498 1499 static int blind_seek; 1500 1501 /* 1502 * This is the routine called after every seek (or recalibrate) interrupt 1503 * from the floppy controller. 1504 */ 1505 static void seek_interrupt(void) 1506 { 1507 debugt(__func__, ""); 1508 if (inr != 2 || (ST0 & 0xF8) != 0x20) { 1509 DPRINT("seek failed\n"); 1510 DRS->track = NEED_2_RECAL; 1511 cont->error(); 1512 cont->redo(); 1513 return; 1514 } 1515 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { 1516 debug_dcl(DP->flags, 1517 "clearing NEWCHANGE flag because of effective seek\n"); 1518 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); 1519 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1520 /* effective seek */ 1521 DRS->select_date = jiffies; 1522 } 1523 DRS->track = ST1; 1524 floppy_ready(); 1525 } 1526 1527 static void check_wp(void) 1528 { 1529 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { 1530 /* check write protection */ 1531 output_byte(FD_GETSTATUS); 1532 output_byte(UNIT(current_drive)); 1533 if (result() != 1) { 1534 FDCS->reset = 1; 1535 return; 1536 } 1537 clear_bit(FD_VERIFY_BIT, &DRS->flags); 1538 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1539 debug_dcl(DP->flags, 1540 "checking whether disk is write protected\n"); 1541 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); 1542 if (!(ST3 & 0x40)) 1543 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1544 else 1545 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1546 } 1547 } 1548 1549 static void seek_floppy(void) 1550 { 1551 int track; 1552 1553 blind_seek = 0; 1554 1555 debug_dcl(DP->flags, "calling disk change from %s\n", __func__); 1556 1557 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1558 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { 1559 /* the media changed flag should be cleared after the seek. 1560 * If it isn't, this means that there is really no disk in 1561 * the drive. 1562 */ 1563 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); 1564 cont->done(0); 1565 cont->redo(); 1566 return; 1567 } 1568 if (DRS->track <= NEED_1_RECAL) { 1569 recalibrate_floppy(); 1570 return; 1571 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1572 (raw_cmd->flags & FD_RAW_NEED_DISK) && 1573 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { 1574 /* we seek to clear the media-changed condition. Does anybody 1575 * know a more elegant way, which works on all drives? */ 1576 if (raw_cmd->track) 1577 track = raw_cmd->track - 1; 1578 else { 1579 if (DP->flags & FD_SILENT_DCL_CLEAR) { 1580 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); 1581 blind_seek = 1; 1582 raw_cmd->flags |= FD_RAW_NEED_SEEK; 1583 } 1584 track = 1; 1585 } 1586 } else { 1587 check_wp(); 1588 if (raw_cmd->track != DRS->track && 1589 (raw_cmd->flags & FD_RAW_NEED_SEEK)) 1590 track = raw_cmd->track; 1591 else { 1592 setup_rw_floppy(); 1593 return; 1594 } 1595 } 1596 1597 do_floppy = seek_interrupt; 1598 output_byte(FD_SEEK); 1599 output_byte(UNIT(current_drive)); 1600 if (output_byte(track) < 0) { 1601 reset_fdc(); 1602 return; 1603 } 1604 debugt(__func__, ""); 1605 } 1606 1607 static void recal_interrupt(void) 1608 { 1609 debugt(__func__, ""); 1610 if (inr != 2) 1611 FDCS->reset = 1; 1612 else if (ST0 & ST0_ECE) { 1613 switch (DRS->track) { 1614 case NEED_1_RECAL: 1615 debugt(__func__, "need 1 recal"); 1616 /* after a second recalibrate, we still haven't 1617 * reached track 0. Probably no drive. Raise an 1618 * error, as failing immediately might upset 1619 * computers possessed by the Devil :-) */ 1620 cont->error(); 1621 cont->redo(); 1622 return; 1623 case NEED_2_RECAL: 1624 debugt(__func__, "need 2 recal"); 1625 /* If we already did a recalibrate, 1626 * and we are not at track 0, this 1627 * means we have moved. (The only way 1628 * not to move at recalibration is to 1629 * be already at track 0.) Clear the 1630 * new change flag */ 1631 debug_dcl(DP->flags, 1632 "clearing NEWCHANGE flag because of second recalibrate\n"); 1633 1634 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1635 DRS->select_date = jiffies; 1636 /* fall through */ 1637 default: 1638 debugt(__func__, "default"); 1639 /* Recalibrate moves the head by at 1640 * most 80 steps. If after one 1641 * recalibrate we don't have reached 1642 * track 0, this might mean that we 1643 * started beyond track 80. Try 1644 * again. */ 1645 DRS->track = NEED_1_RECAL; 1646 break; 1647 } 1648 } else 1649 DRS->track = ST1; 1650 floppy_ready(); 1651 } 1652 1653 static void print_result(char *message, int inr) 1654 { 1655 int i; 1656 1657 DPRINT("%s ", message); 1658 if (inr >= 0) 1659 for (i = 0; i < inr; i++) 1660 pr_cont("repl[%d]=%x ", i, reply_buffer[i]); 1661 pr_cont("\n"); 1662 } 1663 1664 /* interrupt handler. Note that this can be called externally on the Sparc */ 1665 irqreturn_t floppy_interrupt(int irq, void *dev_id) 1666 { 1667 int do_print; 1668 unsigned long f; 1669 void (*handler)(void) = do_floppy; 1670 1671 lasthandler = handler; 1672 interruptjiffies = jiffies; 1673 1674 f = claim_dma_lock(); 1675 fd_disable_dma(); 1676 release_dma_lock(f); 1677 1678 do_floppy = NULL; 1679 if (fdc >= N_FDC || FDCS->address == -1) { 1680 /* we don't even know which FDC is the culprit */ 1681 pr_info("DOR0=%x\n", fdc_state[0].dor); 1682 pr_info("floppy interrupt on bizarre fdc %d\n", fdc); 1683 pr_info("handler=%pf\n", handler); 1684 is_alive(__func__, "bizarre fdc"); 1685 return IRQ_NONE; 1686 } 1687 1688 FDCS->reset = 0; 1689 /* We have to clear the reset flag here, because apparently on boxes 1690 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to 1691 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the 1692 * emission of the SENSEI's. 1693 * It is OK to emit floppy commands because we are in an interrupt 1694 * handler here, and thus we have to fear no interference of other 1695 * activity. 1696 */ 1697 1698 do_print = !handler && print_unex && initialized; 1699 1700 inr = result(); 1701 if (do_print) 1702 print_result("unexpected interrupt", inr); 1703 if (inr == 0) { 1704 int max_sensei = 4; 1705 do { 1706 output_byte(FD_SENSEI); 1707 inr = result(); 1708 if (do_print) 1709 print_result("sensei", inr); 1710 max_sensei--; 1711 } while ((ST0 & 0x83) != UNIT(current_drive) && 1712 inr == 2 && max_sensei); 1713 } 1714 if (!handler) { 1715 FDCS->reset = 1; 1716 return IRQ_NONE; 1717 } 1718 schedule_bh(handler); 1719 is_alive(__func__, "normal interrupt end"); 1720 1721 /* FIXME! Was it really for us? */ 1722 return IRQ_HANDLED; 1723 } 1724 1725 static void recalibrate_floppy(void) 1726 { 1727 debugt(__func__, ""); 1728 do_floppy = recal_interrupt; 1729 output_byte(FD_RECALIBRATE); 1730 if (output_byte(UNIT(current_drive)) < 0) 1731 reset_fdc(); 1732 } 1733 1734 /* 1735 * Must do 4 FD_SENSEIs after reset because of ``drive polling''. 1736 */ 1737 static void reset_interrupt(void) 1738 { 1739 debugt(__func__, ""); 1740 result(); /* get the status ready for set_fdc */ 1741 if (FDCS->reset) { 1742 pr_info("reset set in interrupt, calling %pf\n", cont->error); 1743 cont->error(); /* a reset just after a reset. BAD! */ 1744 } 1745 cont->redo(); 1746 } 1747 1748 /* 1749 * reset is done by pulling bit 2 of DOR low for a while (old FDCs), 1750 * or by setting the self clearing bit 7 of STATUS (newer FDCs) 1751 */ 1752 static void reset_fdc(void) 1753 { 1754 unsigned long flags; 1755 1756 do_floppy = reset_interrupt; 1757 FDCS->reset = 0; 1758 reset_fdc_info(0); 1759 1760 /* Pseudo-DMA may intercept 'reset finished' interrupt. */ 1761 /* Irrelevant for systems with true DMA (i386). */ 1762 1763 flags = claim_dma_lock(); 1764 fd_disable_dma(); 1765 release_dma_lock(flags); 1766 1767 if (FDCS->version >= FDC_82072A) 1768 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); 1769 else { 1770 fd_outb(FDCS->dor & ~0x04, FD_DOR); 1771 udelay(FD_RESET_DELAY); 1772 fd_outb(FDCS->dor, FD_DOR); 1773 } 1774 } 1775 1776 static void show_floppy(void) 1777 { 1778 int i; 1779 1780 pr_info("\n"); 1781 pr_info("floppy driver state\n"); 1782 pr_info("-------------------\n"); 1783 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", 1784 jiffies, interruptjiffies, jiffies - interruptjiffies, 1785 lasthandler); 1786 1787 pr_info("timeout_message=%s\n", timeout_message); 1788 pr_info("last output bytes:\n"); 1789 for (i = 0; i < OLOGSIZE; i++) 1790 pr_info("%2x %2x %lu\n", 1791 output_log[(i + output_log_pos) % OLOGSIZE].data, 1792 output_log[(i + output_log_pos) % OLOGSIZE].status, 1793 output_log[(i + output_log_pos) % OLOGSIZE].jiffies); 1794 pr_info("last result at %lu\n", resultjiffies); 1795 pr_info("last redo_fd_request at %lu\n", lastredo); 1796 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, 1797 reply_buffer, resultsize, true); 1798 1799 pr_info("status=%x\n", fd_inb(FD_STATUS)); 1800 pr_info("fdc_busy=%lu\n", fdc_busy); 1801 if (do_floppy) 1802 pr_info("do_floppy=%pf\n", do_floppy); 1803 if (work_pending(&floppy_work)) 1804 pr_info("floppy_work.func=%pf\n", floppy_work.func); 1805 if (timer_pending(&fd_timer)) 1806 pr_info("fd_timer.function=%pf\n", fd_timer.function); 1807 if (timer_pending(&fd_timeout)) { 1808 pr_info("timer_function=%pf\n", fd_timeout.function); 1809 pr_info("expires=%lu\n", fd_timeout.expires - jiffies); 1810 pr_info("now=%lu\n", jiffies); 1811 } 1812 pr_info("cont=%p\n", cont); 1813 pr_info("current_req=%p\n", current_req); 1814 pr_info("command_status=%d\n", command_status); 1815 pr_info("\n"); 1816 } 1817 1818 static void floppy_shutdown(unsigned long data) 1819 { 1820 unsigned long flags; 1821 1822 if (initialized) 1823 show_floppy(); 1824 cancel_activity(); 1825 1826 flags = claim_dma_lock(); 1827 fd_disable_dma(); 1828 release_dma_lock(flags); 1829 1830 /* avoid dma going to a random drive after shutdown */ 1831 1832 if (initialized) 1833 DPRINT("floppy timeout called\n"); 1834 FDCS->reset = 1; 1835 if (cont) { 1836 cont->done(0); 1837 cont->redo(); /* this will recall reset when needed */ 1838 } else { 1839 pr_info("no cont in shutdown!\n"); 1840 process_fd_request(); 1841 } 1842 is_alive(__func__, ""); 1843 } 1844 1845 /* start motor, check media-changed condition and write protection */ 1846 static int start_motor(void (*function)(void)) 1847 { 1848 int mask; 1849 int data; 1850 1851 mask = 0xfc; 1852 data = UNIT(current_drive); 1853 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { 1854 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { 1855 set_debugt(); 1856 /* no read since this drive is running */ 1857 DRS->first_read_date = 0; 1858 /* note motor start time if motor is not yet running */ 1859 DRS->spinup_date = jiffies; 1860 data |= (0x10 << UNIT(current_drive)); 1861 } 1862 } else if (FDCS->dor & (0x10 << UNIT(current_drive))) 1863 mask &= ~(0x10 << UNIT(current_drive)); 1864 1865 /* starts motor and selects floppy */ 1866 del_timer(motor_off_timer + current_drive); 1867 set_dor(fdc, mask, data); 1868 1869 /* wait_for_completion also schedules reset if needed. */ 1870 return fd_wait_for_completion(DRS->select_date + DP->select_delay, 1871 (timeout_fn)function); 1872 } 1873 1874 static void floppy_ready(void) 1875 { 1876 if (FDCS->reset) { 1877 reset_fdc(); 1878 return; 1879 } 1880 if (start_motor(floppy_ready)) 1881 return; 1882 if (fdc_dtr()) 1883 return; 1884 1885 debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); 1886 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && 1887 disk_change(current_drive) && !DP->select_delay) 1888 twaddle(); /* this clears the dcl on certain 1889 * drive/controller combinations */ 1890 1891 #ifdef fd_chose_dma_mode 1892 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { 1893 unsigned long flags = claim_dma_lock(); 1894 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); 1895 release_dma_lock(flags); 1896 } 1897 #endif 1898 1899 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { 1900 perpendicular_mode(); 1901 fdc_specify(); /* must be done here because of hut, hlt ... */ 1902 seek_floppy(); 1903 } else { 1904 if ((raw_cmd->flags & FD_RAW_READ) || 1905 (raw_cmd->flags & FD_RAW_WRITE)) 1906 fdc_specify(); 1907 setup_rw_floppy(); 1908 } 1909 } 1910 1911 static void floppy_start(void) 1912 { 1913 reschedule_timeout(current_reqD, "floppy start"); 1914 1915 scandrives(); 1916 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); 1917 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1918 floppy_ready(); 1919 } 1920 1921 /* 1922 * ======================================================================== 1923 * here ends the bottom half. Exported routines are: 1924 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, 1925 * start_motor, reset_fdc, reset_fdc_info, interpret_errors. 1926 * Initialization also uses output_byte, result, set_dor, floppy_interrupt 1927 * and set_dor. 1928 * ======================================================================== 1929 */ 1930 /* 1931 * General purpose continuations. 1932 * ============================== 1933 */ 1934 1935 static void do_wakeup(void) 1936 { 1937 reschedule_timeout(MAXTIMEOUT, "do wakeup"); 1938 cont = NULL; 1939 command_status += 2; 1940 wake_up(&command_done); 1941 } 1942 1943 static const struct cont_t wakeup_cont = { 1944 .interrupt = empty, 1945 .redo = do_wakeup, 1946 .error = empty, 1947 .done = (done_f)empty 1948 }; 1949 1950 static const struct cont_t intr_cont = { 1951 .interrupt = empty, 1952 .redo = process_fd_request, 1953 .error = empty, 1954 .done = (done_f)empty 1955 }; 1956 1957 static int wait_til_done(void (*handler)(void), bool interruptible) 1958 { 1959 int ret; 1960 1961 schedule_bh(handler); 1962 1963 if (interruptible) 1964 wait_event_interruptible(command_done, command_status >= 2); 1965 else 1966 wait_event(command_done, command_status >= 2); 1967 1968 if (command_status < 2) { 1969 cancel_activity(); 1970 cont = &intr_cont; 1971 reset_fdc(); 1972 return -EINTR; 1973 } 1974 1975 if (FDCS->reset) 1976 command_status = FD_COMMAND_ERROR; 1977 if (command_status == FD_COMMAND_OKAY) 1978 ret = 0; 1979 else 1980 ret = -EIO; 1981 command_status = FD_COMMAND_NONE; 1982 return ret; 1983 } 1984 1985 static void generic_done(int result) 1986 { 1987 command_status = result; 1988 cont = &wakeup_cont; 1989 } 1990 1991 static void generic_success(void) 1992 { 1993 cont->done(1); 1994 } 1995 1996 static void generic_failure(void) 1997 { 1998 cont->done(0); 1999 } 2000 2001 static void success_and_wakeup(void) 2002 { 2003 generic_success(); 2004 cont->redo(); 2005 } 2006 2007 /* 2008 * formatting and rw support. 2009 * ========================== 2010 */ 2011 2012 static int next_valid_format(void) 2013 { 2014 int probed_format; 2015 2016 probed_format = DRS->probed_format; 2017 while (1) { 2018 if (probed_format >= 8 || !DP->autodetect[probed_format]) { 2019 DRS->probed_format = 0; 2020 return 1; 2021 } 2022 if (floppy_type[DP->autodetect[probed_format]].sect) { 2023 DRS->probed_format = probed_format; 2024 return 0; 2025 } 2026 probed_format++; 2027 } 2028 } 2029 2030 static void bad_flp_intr(void) 2031 { 2032 int err_count; 2033 2034 if (probing) { 2035 DRS->probed_format++; 2036 if (!next_valid_format()) 2037 return; 2038 } 2039 err_count = ++(*errors); 2040 INFBOUND(DRWE->badness, err_count); 2041 if (err_count > DP->max_errors.abort) 2042 cont->done(0); 2043 if (err_count > DP->max_errors.reset) 2044 FDCS->reset = 1; 2045 else if (err_count > DP->max_errors.recal) 2046 DRS->track = NEED_2_RECAL; 2047 } 2048 2049 static void set_floppy(int drive) 2050 { 2051 int type = ITYPE(UDRS->fd_device); 2052 2053 if (type) 2054 _floppy = floppy_type + type; 2055 else 2056 _floppy = current_type[drive]; 2057 } 2058 2059 /* 2060 * formatting support. 2061 * =================== 2062 */ 2063 static void format_interrupt(void) 2064 { 2065 switch (interpret_errors()) { 2066 case 1: 2067 cont->error(); 2068 case 2: 2069 break; 2070 case 0: 2071 cont->done(1); 2072 } 2073 cont->redo(); 2074 } 2075 2076 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) 2077 #define CT(x) ((x) | 0xc0) 2078 2079 static void setup_format_params(int track) 2080 { 2081 int n; 2082 int il; 2083 int count; 2084 int head_shift; 2085 int track_shift; 2086 struct fparm { 2087 unsigned char track, head, sect, size; 2088 } *here = (struct fparm *)floppy_track_buffer; 2089 2090 raw_cmd = &default_raw_cmd; 2091 raw_cmd->track = track; 2092 2093 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | 2094 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); 2095 raw_cmd->rate = _floppy->rate & 0x43; 2096 raw_cmd->cmd_count = NR_F; 2097 COMMAND = FM_MODE(_floppy, FD_FORMAT); 2098 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); 2099 F_SIZECODE = FD_SIZECODE(_floppy); 2100 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; 2101 F_GAP = _floppy->fmt_gap; 2102 F_FILL = FD_FILL_BYTE; 2103 2104 raw_cmd->kernel_data = floppy_track_buffer; 2105 raw_cmd->length = 4 * F_SECT_PER_TRACK; 2106 2107 /* allow for about 30ms for data transport per track */ 2108 head_shift = (F_SECT_PER_TRACK + 5) / 6; 2109 2110 /* a ``cylinder'' is two tracks plus a little stepping time */ 2111 track_shift = 2 * head_shift + 3; 2112 2113 /* position of logical sector 1 on this track */ 2114 n = (track_shift * format_req.track + head_shift * format_req.head) 2115 % F_SECT_PER_TRACK; 2116 2117 /* determine interleave */ 2118 il = 1; 2119 if (_floppy->fmt_gap < 0x22) 2120 il++; 2121 2122 /* initialize field */ 2123 for (count = 0; count < F_SECT_PER_TRACK; ++count) { 2124 here[count].track = format_req.track; 2125 here[count].head = format_req.head; 2126 here[count].sect = 0; 2127 here[count].size = F_SIZECODE; 2128 } 2129 /* place logical sectors */ 2130 for (count = 1; count <= F_SECT_PER_TRACK; ++count) { 2131 here[n].sect = count; 2132 n = (n + il) % F_SECT_PER_TRACK; 2133 if (here[n].sect) { /* sector busy, find next free sector */ 2134 ++n; 2135 if (n >= F_SECT_PER_TRACK) { 2136 n -= F_SECT_PER_TRACK; 2137 while (here[n].sect) 2138 ++n; 2139 } 2140 } 2141 } 2142 if (_floppy->stretch & FD_SECTBASEMASK) { 2143 for (count = 0; count < F_SECT_PER_TRACK; count++) 2144 here[count].sect += FD_SECTBASE(_floppy) - 1; 2145 } 2146 } 2147 2148 static void redo_format(void) 2149 { 2150 buffer_track = -1; 2151 setup_format_params(format_req.track << STRETCH(_floppy)); 2152 floppy_start(); 2153 debugt(__func__, "queue format request"); 2154 } 2155 2156 static const struct cont_t format_cont = { 2157 .interrupt = format_interrupt, 2158 .redo = redo_format, 2159 .error = bad_flp_intr, 2160 .done = generic_done 2161 }; 2162 2163 static int do_format(int drive, struct format_descr *tmp_format_req) 2164 { 2165 int ret; 2166 2167 if (lock_fdc(drive, true)) 2168 return -EINTR; 2169 2170 set_floppy(drive); 2171 if (!_floppy || 2172 _floppy->track > DP->tracks || 2173 tmp_format_req->track >= _floppy->track || 2174 tmp_format_req->head >= _floppy->head || 2175 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || 2176 !_floppy->fmt_gap) { 2177 process_fd_request(); 2178 return -EINVAL; 2179 } 2180 format_req = *tmp_format_req; 2181 format_errors = 0; 2182 cont = &format_cont; 2183 errors = &format_errors; 2184 ret = wait_til_done(redo_format, true); 2185 if (ret == -EINTR) 2186 return -EINTR; 2187 process_fd_request(); 2188 return ret; 2189 } 2190 2191 /* 2192 * Buffer read/write and support 2193 * ============================= 2194 */ 2195 2196 static void floppy_end_request(struct request *req, int error) 2197 { 2198 unsigned int nr_sectors = current_count_sectors; 2199 unsigned int drive = (unsigned long)req->rq_disk->private_data; 2200 2201 /* current_count_sectors can be zero if transfer failed */ 2202 if (error) 2203 nr_sectors = blk_rq_cur_sectors(req); 2204 if (__blk_end_request(req, error, nr_sectors << 9)) 2205 return; 2206 2207 /* We're done with the request */ 2208 floppy_off(drive); 2209 current_req = NULL; 2210 } 2211 2212 /* new request_done. Can handle physical sectors which are smaller than a 2213 * logical buffer */ 2214 static void request_done(int uptodate) 2215 { 2216 struct request *req = current_req; 2217 struct request_queue *q; 2218 unsigned long flags; 2219 int block; 2220 char msg[sizeof("request done ") + sizeof(int) * 3]; 2221 2222 probing = 0; 2223 snprintf(msg, sizeof(msg), "request done %d", uptodate); 2224 reschedule_timeout(MAXTIMEOUT, msg); 2225 2226 if (!req) { 2227 pr_info("floppy.c: no request in request_done\n"); 2228 return; 2229 } 2230 2231 q = req->q; 2232 2233 if (uptodate) { 2234 /* maintain values for invalidation on geometry 2235 * change */ 2236 block = current_count_sectors + blk_rq_pos(req); 2237 INFBOUND(DRS->maxblock, block); 2238 if (block > _floppy->sect) 2239 DRS->maxtrack = 1; 2240 2241 /* unlock chained buffers */ 2242 spin_lock_irqsave(q->queue_lock, flags); 2243 floppy_end_request(req, 0); 2244 spin_unlock_irqrestore(q->queue_lock, flags); 2245 } else { 2246 if (rq_data_dir(req) == WRITE) { 2247 /* record write error information */ 2248 DRWE->write_errors++; 2249 if (DRWE->write_errors == 1) { 2250 DRWE->first_error_sector = blk_rq_pos(req); 2251 DRWE->first_error_generation = DRS->generation; 2252 } 2253 DRWE->last_error_sector = blk_rq_pos(req); 2254 DRWE->last_error_generation = DRS->generation; 2255 } 2256 spin_lock_irqsave(q->queue_lock, flags); 2257 floppy_end_request(req, -EIO); 2258 spin_unlock_irqrestore(q->queue_lock, flags); 2259 } 2260 } 2261 2262 /* Interrupt handler evaluating the result of the r/w operation */ 2263 static void rw_interrupt(void) 2264 { 2265 int eoc; 2266 int ssize; 2267 int heads; 2268 int nr_sectors; 2269 2270 if (R_HEAD >= 2) { 2271 /* some Toshiba floppy controllers occasionnally seem to 2272 * return bogus interrupts after read/write operations, which 2273 * can be recognized by a bad head number (>= 2) */ 2274 return; 2275 } 2276 2277 if (!DRS->first_read_date) 2278 DRS->first_read_date = jiffies; 2279 2280 nr_sectors = 0; 2281 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2282 2283 if (ST1 & ST1_EOC) 2284 eoc = 1; 2285 else 2286 eoc = 0; 2287 2288 if (COMMAND & 0x80) 2289 heads = 2; 2290 else 2291 heads = 1; 2292 2293 nr_sectors = (((R_TRACK - TRACK) * heads + 2294 R_HEAD - HEAD) * SECT_PER_TRACK + 2295 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; 2296 2297 if (nr_sectors / ssize > 2298 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { 2299 DPRINT("long rw: %x instead of %lx\n", 2300 nr_sectors, current_count_sectors); 2301 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); 2302 pr_info("rh=%d h=%d\n", R_HEAD, HEAD); 2303 pr_info("rt=%d t=%d\n", R_TRACK, TRACK); 2304 pr_info("heads=%d eoc=%d\n", heads, eoc); 2305 pr_info("spt=%d st=%d ss=%d\n", 2306 SECT_PER_TRACK, fsector_t, ssize); 2307 pr_info("in_sector_offset=%d\n", in_sector_offset); 2308 } 2309 2310 nr_sectors -= in_sector_offset; 2311 INFBOUND(nr_sectors, 0); 2312 SUPBOUND(current_count_sectors, nr_sectors); 2313 2314 switch (interpret_errors()) { 2315 case 2: 2316 cont->redo(); 2317 return; 2318 case 1: 2319 if (!current_count_sectors) { 2320 cont->error(); 2321 cont->redo(); 2322 return; 2323 } 2324 break; 2325 case 0: 2326 if (!current_count_sectors) { 2327 cont->redo(); 2328 return; 2329 } 2330 current_type[current_drive] = _floppy; 2331 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2332 break; 2333 } 2334 2335 if (probing) { 2336 if (DP->flags & FTD_MSG) 2337 DPRINT("Auto-detected floppy type %s in fd%d\n", 2338 _floppy->name, current_drive); 2339 current_type[current_drive] = _floppy; 2340 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2341 probing = 0; 2342 } 2343 2344 if (CT(COMMAND) != FD_READ || 2345 raw_cmd->kernel_data == current_req->buffer) { 2346 /* transfer directly from buffer */ 2347 cont->done(1); 2348 } else if (CT(COMMAND) == FD_READ) { 2349 buffer_track = raw_cmd->track; 2350 buffer_drive = current_drive; 2351 INFBOUND(buffer_max, nr_sectors + fsector_t); 2352 } 2353 cont->redo(); 2354 } 2355 2356 /* Compute maximal contiguous buffer size. */ 2357 static int buffer_chain_size(void) 2358 { 2359 struct bio_vec *bv; 2360 int size; 2361 struct req_iterator iter; 2362 char *base; 2363 2364 base = bio_data(current_req->bio); 2365 size = 0; 2366 2367 rq_for_each_segment(bv, current_req, iter) { 2368 if (page_address(bv->bv_page) + bv->bv_offset != base + size) 2369 break; 2370 2371 size += bv->bv_len; 2372 } 2373 2374 return size >> 9; 2375 } 2376 2377 /* Compute the maximal transfer size */ 2378 static int transfer_size(int ssize, int max_sector, int max_size) 2379 { 2380 SUPBOUND(max_sector, fsector_t + max_size); 2381 2382 /* alignment */ 2383 max_sector -= (max_sector % _floppy->sect) % ssize; 2384 2385 /* transfer size, beginning not aligned */ 2386 current_count_sectors = max_sector - fsector_t; 2387 2388 return max_sector; 2389 } 2390 2391 /* 2392 * Move data from/to the track buffer to/from the buffer cache. 2393 */ 2394 static void copy_buffer(int ssize, int max_sector, int max_sector_2) 2395 { 2396 int remaining; /* number of transferred 512-byte sectors */ 2397 struct bio_vec *bv; 2398 char *buffer; 2399 char *dma_buffer; 2400 int size; 2401 struct req_iterator iter; 2402 2403 max_sector = transfer_size(ssize, 2404 min(max_sector, max_sector_2), 2405 blk_rq_sectors(current_req)); 2406 2407 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && 2408 buffer_max > fsector_t + blk_rq_sectors(current_req)) 2409 current_count_sectors = min_t(int, buffer_max - fsector_t, 2410 blk_rq_sectors(current_req)); 2411 2412 remaining = current_count_sectors << 9; 2413 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { 2414 DPRINT("in copy buffer\n"); 2415 pr_info("current_count_sectors=%ld\n", current_count_sectors); 2416 pr_info("remaining=%d\n", remaining >> 9); 2417 pr_info("current_req->nr_sectors=%u\n", 2418 blk_rq_sectors(current_req)); 2419 pr_info("current_req->current_nr_sectors=%u\n", 2420 blk_rq_cur_sectors(current_req)); 2421 pr_info("max_sector=%d\n", max_sector); 2422 pr_info("ssize=%d\n", ssize); 2423 } 2424 2425 buffer_max = max(max_sector, buffer_max); 2426 2427 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); 2428 2429 size = blk_rq_cur_bytes(current_req); 2430 2431 rq_for_each_segment(bv, current_req, iter) { 2432 if (!remaining) 2433 break; 2434 2435 size = bv->bv_len; 2436 SUPBOUND(size, remaining); 2437 2438 buffer = page_address(bv->bv_page) + bv->bv_offset; 2439 if (dma_buffer + size > 2440 floppy_track_buffer + (max_buffer_sectors << 10) || 2441 dma_buffer < floppy_track_buffer) { 2442 DPRINT("buffer overrun in copy buffer %d\n", 2443 (int)((floppy_track_buffer - dma_buffer) >> 9)); 2444 pr_info("fsector_t=%d buffer_min=%d\n", 2445 fsector_t, buffer_min); 2446 pr_info("current_count_sectors=%ld\n", 2447 current_count_sectors); 2448 if (CT(COMMAND) == FD_READ) 2449 pr_info("read\n"); 2450 if (CT(COMMAND) == FD_WRITE) 2451 pr_info("write\n"); 2452 break; 2453 } 2454 if (((unsigned long)buffer) % 512) 2455 DPRINT("%p buffer not aligned\n", buffer); 2456 2457 if (CT(COMMAND) == FD_READ) 2458 memcpy(buffer, dma_buffer, size); 2459 else 2460 memcpy(dma_buffer, buffer, size); 2461 2462 remaining -= size; 2463 dma_buffer += size; 2464 } 2465 if (remaining) { 2466 if (remaining > 0) 2467 max_sector -= remaining >> 9; 2468 DPRINT("weirdness: remaining %d\n", remaining >> 9); 2469 } 2470 } 2471 2472 /* work around a bug in pseudo DMA 2473 * (on some FDCs) pseudo DMA does not stop when the CPU stops 2474 * sending data. Hence we need a different way to signal the 2475 * transfer length: We use SECT_PER_TRACK. Unfortunately, this 2476 * does not work with MT, hence we can only transfer one head at 2477 * a time 2478 */ 2479 static void virtualdmabug_workaround(void) 2480 { 2481 int hard_sectors; 2482 int end_sector; 2483 2484 if (CT(COMMAND) == FD_WRITE) { 2485 COMMAND &= ~0x80; /* switch off multiple track mode */ 2486 2487 hard_sectors = raw_cmd->length >> (7 + SIZECODE); 2488 end_sector = SECTOR + hard_sectors - 1; 2489 if (end_sector > SECT_PER_TRACK) { 2490 pr_info("too many sectors %d > %d\n", 2491 end_sector, SECT_PER_TRACK); 2492 return; 2493 } 2494 SECT_PER_TRACK = end_sector; 2495 /* make sure SECT_PER_TRACK 2496 * points to end of transfer */ 2497 } 2498 } 2499 2500 /* 2501 * Formulate a read/write request. 2502 * this routine decides where to load the data (directly to buffer, or to 2503 * tmp floppy area), how much data to load (the size of the buffer, the whole 2504 * track, or a single sector) 2505 * All floppy_track_buffer handling goes in here. If we ever add track buffer 2506 * allocation on the fly, it should be done here. No other part should need 2507 * modification. 2508 */ 2509 2510 static int make_raw_rw_request(void) 2511 { 2512 int aligned_sector_t; 2513 int max_sector; 2514 int max_size; 2515 int tracksize; 2516 int ssize; 2517 2518 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) 2519 return 0; 2520 2521 set_fdc((long)current_req->rq_disk->private_data); 2522 2523 raw_cmd = &default_raw_cmd; 2524 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | 2525 FD_RAW_NEED_SEEK; 2526 raw_cmd->cmd_count = NR_RW; 2527 if (rq_data_dir(current_req) == READ) { 2528 raw_cmd->flags |= FD_RAW_READ; 2529 COMMAND = FM_MODE(_floppy, FD_READ); 2530 } else if (rq_data_dir(current_req) == WRITE) { 2531 raw_cmd->flags |= FD_RAW_WRITE; 2532 COMMAND = FM_MODE(_floppy, FD_WRITE); 2533 } else { 2534 DPRINT("%s: unknown command\n", __func__); 2535 return 0; 2536 } 2537 2538 max_sector = _floppy->sect * _floppy->head; 2539 2540 TRACK = (int)blk_rq_pos(current_req) / max_sector; 2541 fsector_t = (int)blk_rq_pos(current_req) % max_sector; 2542 if (_floppy->track && TRACK >= _floppy->track) { 2543 if (blk_rq_cur_sectors(current_req) & 1) { 2544 current_count_sectors = 1; 2545 return 1; 2546 } else 2547 return 0; 2548 } 2549 HEAD = fsector_t / _floppy->sect; 2550 2551 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || 2552 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && 2553 fsector_t < _floppy->sect) 2554 max_sector = _floppy->sect; 2555 2556 /* 2M disks have phantom sectors on the first track */ 2557 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { 2558 max_sector = 2 * _floppy->sect / 3; 2559 if (fsector_t >= max_sector) { 2560 current_count_sectors = 2561 min_t(int, _floppy->sect - fsector_t, 2562 blk_rq_sectors(current_req)); 2563 return 1; 2564 } 2565 SIZECODE = 2; 2566 } else 2567 SIZECODE = FD_SIZECODE(_floppy); 2568 raw_cmd->rate = _floppy->rate & 0x43; 2569 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) 2570 raw_cmd->rate = 1; 2571 2572 if (SIZECODE) 2573 SIZECODE2 = 0xff; 2574 else 2575 SIZECODE2 = 0x80; 2576 raw_cmd->track = TRACK << STRETCH(_floppy); 2577 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); 2578 GAP = _floppy->gap; 2579 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2580 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; 2581 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + 2582 FD_SECTBASE(_floppy); 2583 2584 /* tracksize describes the size which can be filled up with sectors 2585 * of size ssize. 2586 */ 2587 tracksize = _floppy->sect - _floppy->sect % ssize; 2588 if (tracksize < _floppy->sect) { 2589 SECT_PER_TRACK++; 2590 if (tracksize <= fsector_t % _floppy->sect) 2591 SECTOR--; 2592 2593 /* if we are beyond tracksize, fill up using smaller sectors */ 2594 while (tracksize <= fsector_t % _floppy->sect) { 2595 while (tracksize + ssize > _floppy->sect) { 2596 SIZECODE--; 2597 ssize >>= 1; 2598 } 2599 SECTOR++; 2600 SECT_PER_TRACK++; 2601 tracksize += ssize; 2602 } 2603 max_sector = HEAD * _floppy->sect + tracksize; 2604 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { 2605 max_sector = _floppy->sect; 2606 } else if (!HEAD && CT(COMMAND) == FD_WRITE) { 2607 /* for virtual DMA bug workaround */ 2608 max_sector = _floppy->sect; 2609 } 2610 2611 in_sector_offset = (fsector_t % _floppy->sect) % ssize; 2612 aligned_sector_t = fsector_t - in_sector_offset; 2613 max_size = blk_rq_sectors(current_req); 2614 if ((raw_cmd->track == buffer_track) && 2615 (current_drive == buffer_drive) && 2616 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { 2617 /* data already in track buffer */ 2618 if (CT(COMMAND) == FD_READ) { 2619 copy_buffer(1, max_sector, buffer_max); 2620 return 1; 2621 } 2622 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { 2623 if (CT(COMMAND) == FD_WRITE) { 2624 unsigned int sectors; 2625 2626 sectors = fsector_t + blk_rq_sectors(current_req); 2627 if (sectors > ssize && sectors < ssize + ssize) 2628 max_size = ssize + ssize; 2629 else 2630 max_size = ssize; 2631 } 2632 raw_cmd->flags &= ~FD_RAW_WRITE; 2633 raw_cmd->flags |= FD_RAW_READ; 2634 COMMAND = FM_MODE(_floppy, FD_READ); 2635 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { 2636 unsigned long dma_limit; 2637 int direct, indirect; 2638 2639 indirect = 2640 transfer_size(ssize, max_sector, 2641 max_buffer_sectors * 2) - fsector_t; 2642 2643 /* 2644 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide 2645 * on a 64 bit machine! 2646 */ 2647 max_size = buffer_chain_size(); 2648 dma_limit = (MAX_DMA_ADDRESS - 2649 ((unsigned long)current_req->buffer)) >> 9; 2650 if ((unsigned long)max_size > dma_limit) 2651 max_size = dma_limit; 2652 /* 64 kb boundaries */ 2653 if (CROSS_64KB(current_req->buffer, max_size << 9)) 2654 max_size = (K_64 - 2655 ((unsigned long)current_req->buffer) % 2656 K_64) >> 9; 2657 direct = transfer_size(ssize, max_sector, max_size) - fsector_t; 2658 /* 2659 * We try to read tracks, but if we get too many errors, we 2660 * go back to reading just one sector at a time. 2661 * 2662 * This means we should be able to read a sector even if there 2663 * are other bad sectors on this track. 2664 */ 2665 if (!direct || 2666 (indirect * 2 > direct * 3 && 2667 *errors < DP->max_errors.read_track && 2668 ((!probing || 2669 (DP->read_track & (1 << DRS->probed_format)))))) { 2670 max_size = blk_rq_sectors(current_req); 2671 } else { 2672 raw_cmd->kernel_data = current_req->buffer; 2673 raw_cmd->length = current_count_sectors << 9; 2674 if (raw_cmd->length == 0) { 2675 DPRINT("%s: zero dma transfer attempted\n", __func__); 2676 DPRINT("indirect=%d direct=%d fsector_t=%d\n", 2677 indirect, direct, fsector_t); 2678 return 0; 2679 } 2680 virtualdmabug_workaround(); 2681 return 2; 2682 } 2683 } 2684 2685 if (CT(COMMAND) == FD_READ) 2686 max_size = max_sector; /* unbounded */ 2687 2688 /* claim buffer track if needed */ 2689 if (buffer_track != raw_cmd->track || /* bad track */ 2690 buffer_drive != current_drive || /* bad drive */ 2691 fsector_t > buffer_max || 2692 fsector_t < buffer_min || 2693 ((CT(COMMAND) == FD_READ || 2694 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && 2695 max_sector > 2 * max_buffer_sectors + buffer_min && 2696 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { 2697 /* not enough space */ 2698 buffer_track = -1; 2699 buffer_drive = current_drive; 2700 buffer_max = buffer_min = aligned_sector_t; 2701 } 2702 raw_cmd->kernel_data = floppy_track_buffer + 2703 ((aligned_sector_t - buffer_min) << 9); 2704 2705 if (CT(COMMAND) == FD_WRITE) { 2706 /* copy write buffer to track buffer. 2707 * if we get here, we know that the write 2708 * is either aligned or the data already in the buffer 2709 * (buffer will be overwritten) */ 2710 if (in_sector_offset && buffer_track == -1) 2711 DPRINT("internal error offset !=0 on write\n"); 2712 buffer_track = raw_cmd->track; 2713 buffer_drive = current_drive; 2714 copy_buffer(ssize, max_sector, 2715 2 * max_buffer_sectors + buffer_min); 2716 } else 2717 transfer_size(ssize, max_sector, 2718 2 * max_buffer_sectors + buffer_min - 2719 aligned_sector_t); 2720 2721 /* round up current_count_sectors to get dma xfer size */ 2722 raw_cmd->length = in_sector_offset + current_count_sectors; 2723 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; 2724 raw_cmd->length <<= 9; 2725 if ((raw_cmd->length < current_count_sectors << 9) || 2726 (raw_cmd->kernel_data != current_req->buffer && 2727 CT(COMMAND) == FD_WRITE && 2728 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || 2729 aligned_sector_t < buffer_min)) || 2730 raw_cmd->length % (128 << SIZECODE) || 2731 raw_cmd->length <= 0 || current_count_sectors <= 0) { 2732 DPRINT("fractionary current count b=%lx s=%lx\n", 2733 raw_cmd->length, current_count_sectors); 2734 if (raw_cmd->kernel_data != current_req->buffer) 2735 pr_info("addr=%d, length=%ld\n", 2736 (int)((raw_cmd->kernel_data - 2737 floppy_track_buffer) >> 9), 2738 current_count_sectors); 2739 pr_info("st=%d ast=%d mse=%d msi=%d\n", 2740 fsector_t, aligned_sector_t, max_sector, max_size); 2741 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); 2742 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", 2743 COMMAND, SECTOR, HEAD, TRACK); 2744 pr_info("buffer drive=%d\n", buffer_drive); 2745 pr_info("buffer track=%d\n", buffer_track); 2746 pr_info("buffer_min=%d\n", buffer_min); 2747 pr_info("buffer_max=%d\n", buffer_max); 2748 return 0; 2749 } 2750 2751 if (raw_cmd->kernel_data != current_req->buffer) { 2752 if (raw_cmd->kernel_data < floppy_track_buffer || 2753 current_count_sectors < 0 || 2754 raw_cmd->length < 0 || 2755 raw_cmd->kernel_data + raw_cmd->length > 2756 floppy_track_buffer + (max_buffer_sectors << 10)) { 2757 DPRINT("buffer overrun in schedule dma\n"); 2758 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", 2759 fsector_t, buffer_min, raw_cmd->length >> 9); 2760 pr_info("current_count_sectors=%ld\n", 2761 current_count_sectors); 2762 if (CT(COMMAND) == FD_READ) 2763 pr_info("read\n"); 2764 if (CT(COMMAND) == FD_WRITE) 2765 pr_info("write\n"); 2766 return 0; 2767 } 2768 } else if (raw_cmd->length > blk_rq_bytes(current_req) || 2769 current_count_sectors > blk_rq_sectors(current_req)) { 2770 DPRINT("buffer overrun in direct transfer\n"); 2771 return 0; 2772 } else if (raw_cmd->length < current_count_sectors << 9) { 2773 DPRINT("more sectors than bytes\n"); 2774 pr_info("bytes=%ld\n", raw_cmd->length >> 9); 2775 pr_info("sectors=%ld\n", current_count_sectors); 2776 } 2777 if (raw_cmd->length == 0) { 2778 DPRINT("zero dma transfer attempted from make_raw_request\n"); 2779 return 0; 2780 } 2781 2782 virtualdmabug_workaround(); 2783 return 2; 2784 } 2785 2786 /* 2787 * Round-robin between our available drives, doing one request from each 2788 */ 2789 static int set_next_request(void) 2790 { 2791 struct request_queue *q; 2792 int old_pos = fdc_queue; 2793 2794 do { 2795 q = disks[fdc_queue]->queue; 2796 if (++fdc_queue == N_DRIVE) 2797 fdc_queue = 0; 2798 if (q) { 2799 current_req = blk_fetch_request(q); 2800 if (current_req) 2801 break; 2802 } 2803 } while (fdc_queue != old_pos); 2804 2805 return current_req != NULL; 2806 } 2807 2808 static void redo_fd_request(void) 2809 { 2810 int drive; 2811 int tmp; 2812 2813 lastredo = jiffies; 2814 if (current_drive < N_DRIVE) 2815 floppy_off(current_drive); 2816 2817 do_request: 2818 if (!current_req) { 2819 int pending; 2820 2821 spin_lock_irq(&floppy_lock); 2822 pending = set_next_request(); 2823 spin_unlock_irq(&floppy_lock); 2824 2825 if (!pending) { 2826 do_floppy = NULL; 2827 unlock_fdc(); 2828 return; 2829 } 2830 } 2831 drive = (long)current_req->rq_disk->private_data; 2832 set_fdc(drive); 2833 reschedule_timeout(current_reqD, "redo fd request"); 2834 2835 set_floppy(drive); 2836 raw_cmd = &default_raw_cmd; 2837 raw_cmd->flags = 0; 2838 if (start_motor(redo_fd_request)) 2839 return; 2840 2841 disk_change(current_drive); 2842 if (test_bit(current_drive, &fake_change) || 2843 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { 2844 DPRINT("disk absent or changed during operation\n"); 2845 request_done(0); 2846 goto do_request; 2847 } 2848 if (!_floppy) { /* Autodetection */ 2849 if (!probing) { 2850 DRS->probed_format = 0; 2851 if (next_valid_format()) { 2852 DPRINT("no autodetectable formats\n"); 2853 _floppy = NULL; 2854 request_done(0); 2855 goto do_request; 2856 } 2857 } 2858 probing = 1; 2859 _floppy = floppy_type + DP->autodetect[DRS->probed_format]; 2860 } else 2861 probing = 0; 2862 errors = &(current_req->errors); 2863 tmp = make_raw_rw_request(); 2864 if (tmp < 2) { 2865 request_done(tmp); 2866 goto do_request; 2867 } 2868 2869 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) 2870 twaddle(); 2871 schedule_bh(floppy_start); 2872 debugt(__func__, "queue fd request"); 2873 return; 2874 } 2875 2876 static const struct cont_t rw_cont = { 2877 .interrupt = rw_interrupt, 2878 .redo = redo_fd_request, 2879 .error = bad_flp_intr, 2880 .done = request_done 2881 }; 2882 2883 static void process_fd_request(void) 2884 { 2885 cont = &rw_cont; 2886 schedule_bh(redo_fd_request); 2887 } 2888 2889 static void do_fd_request(struct request_queue *q) 2890 { 2891 if (WARN(max_buffer_sectors == 0, 2892 "VFS: %s called on non-open device\n", __func__)) 2893 return; 2894 2895 if (WARN(atomic_read(&usage_count) == 0, 2896 "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n", 2897 current_req, (long)blk_rq_pos(current_req), current_req->cmd_type, 2898 current_req->cmd_flags)) 2899 return; 2900 2901 if (test_bit(0, &fdc_busy)) { 2902 /* fdc busy, this new request will be treated when the 2903 current one is done */ 2904 is_alive(__func__, "old request running"); 2905 return; 2906 } 2907 lock_fdc(MAXTIMEOUT, false); 2908 process_fd_request(); 2909 is_alive(__func__, ""); 2910 } 2911 2912 static const struct cont_t poll_cont = { 2913 .interrupt = success_and_wakeup, 2914 .redo = floppy_ready, 2915 .error = generic_failure, 2916 .done = generic_done 2917 }; 2918 2919 static int poll_drive(bool interruptible, int flag) 2920 { 2921 /* no auto-sense, just clear dcl */ 2922 raw_cmd = &default_raw_cmd; 2923 raw_cmd->flags = flag; 2924 raw_cmd->track = 0; 2925 raw_cmd->cmd_count = 0; 2926 cont = &poll_cont; 2927 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); 2928 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 2929 2930 return wait_til_done(floppy_ready, interruptible); 2931 } 2932 2933 /* 2934 * User triggered reset 2935 * ==================== 2936 */ 2937 2938 static void reset_intr(void) 2939 { 2940 pr_info("weird, reset interrupt called\n"); 2941 } 2942 2943 static const struct cont_t reset_cont = { 2944 .interrupt = reset_intr, 2945 .redo = success_and_wakeup, 2946 .error = generic_failure, 2947 .done = generic_done 2948 }; 2949 2950 static int user_reset_fdc(int drive, int arg, bool interruptible) 2951 { 2952 int ret; 2953 2954 if (lock_fdc(drive, interruptible)) 2955 return -EINTR; 2956 2957 if (arg == FD_RESET_ALWAYS) 2958 FDCS->reset = 1; 2959 if (FDCS->reset) { 2960 cont = &reset_cont; 2961 ret = wait_til_done(reset_fdc, interruptible); 2962 if (ret == -EINTR) 2963 return -EINTR; 2964 } 2965 process_fd_request(); 2966 return 0; 2967 } 2968 2969 /* 2970 * Misc Ioctl's and support 2971 * ======================== 2972 */ 2973 static inline int fd_copyout(void __user *param, const void *address, 2974 unsigned long size) 2975 { 2976 return copy_to_user(param, address, size) ? -EFAULT : 0; 2977 } 2978 2979 static inline int fd_copyin(void __user *param, void *address, 2980 unsigned long size) 2981 { 2982 return copy_from_user(address, param, size) ? -EFAULT : 0; 2983 } 2984 2985 static const char *drive_name(int type, int drive) 2986 { 2987 struct floppy_struct *floppy; 2988 2989 if (type) 2990 floppy = floppy_type + type; 2991 else { 2992 if (UDP->native_format) 2993 floppy = floppy_type + UDP->native_format; 2994 else 2995 return "(null)"; 2996 } 2997 if (floppy->name) 2998 return floppy->name; 2999 else 3000 return "(null)"; 3001 } 3002 3003 /* raw commands */ 3004 static void raw_cmd_done(int flag) 3005 { 3006 int i; 3007 3008 if (!flag) { 3009 raw_cmd->flags |= FD_RAW_FAILURE; 3010 raw_cmd->flags |= FD_RAW_HARDFAILURE; 3011 } else { 3012 raw_cmd->reply_count = inr; 3013 if (raw_cmd->reply_count > MAX_REPLIES) 3014 raw_cmd->reply_count = 0; 3015 for (i = 0; i < raw_cmd->reply_count; i++) 3016 raw_cmd->reply[i] = reply_buffer[i]; 3017 3018 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3019 unsigned long flags; 3020 flags = claim_dma_lock(); 3021 raw_cmd->length = fd_get_dma_residue(); 3022 release_dma_lock(flags); 3023 } 3024 3025 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && 3026 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) 3027 raw_cmd->flags |= FD_RAW_FAILURE; 3028 3029 if (disk_change(current_drive)) 3030 raw_cmd->flags |= FD_RAW_DISK_CHANGE; 3031 else 3032 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; 3033 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) 3034 motor_off_callback(current_drive); 3035 3036 if (raw_cmd->next && 3037 (!(raw_cmd->flags & FD_RAW_FAILURE) || 3038 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && 3039 ((raw_cmd->flags & FD_RAW_FAILURE) || 3040 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { 3041 raw_cmd = raw_cmd->next; 3042 return; 3043 } 3044 } 3045 generic_done(flag); 3046 } 3047 3048 static const struct cont_t raw_cmd_cont = { 3049 .interrupt = success_and_wakeup, 3050 .redo = floppy_start, 3051 .error = generic_failure, 3052 .done = raw_cmd_done 3053 }; 3054 3055 static int raw_cmd_copyout(int cmd, void __user *param, 3056 struct floppy_raw_cmd *ptr) 3057 { 3058 int ret; 3059 3060 while (ptr) { 3061 ret = copy_to_user(param, ptr, sizeof(*ptr)); 3062 if (ret) 3063 return -EFAULT; 3064 param += sizeof(struct floppy_raw_cmd); 3065 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { 3066 if (ptr->length >= 0 && 3067 ptr->length <= ptr->buffer_length) { 3068 long length = ptr->buffer_length - ptr->length; 3069 ret = fd_copyout(ptr->data, ptr->kernel_data, 3070 length); 3071 if (ret) 3072 return ret; 3073 } 3074 } 3075 ptr = ptr->next; 3076 } 3077 3078 return 0; 3079 } 3080 3081 static void raw_cmd_free(struct floppy_raw_cmd **ptr) 3082 { 3083 struct floppy_raw_cmd *next; 3084 struct floppy_raw_cmd *this; 3085 3086 this = *ptr; 3087 *ptr = NULL; 3088 while (this) { 3089 if (this->buffer_length) { 3090 fd_dma_mem_free((unsigned long)this->kernel_data, 3091 this->buffer_length); 3092 this->buffer_length = 0; 3093 } 3094 next = this->next; 3095 kfree(this); 3096 this = next; 3097 } 3098 } 3099 3100 static int raw_cmd_copyin(int cmd, void __user *param, 3101 struct floppy_raw_cmd **rcmd) 3102 { 3103 struct floppy_raw_cmd *ptr; 3104 int ret; 3105 int i; 3106 3107 *rcmd = NULL; 3108 3109 loop: 3110 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); 3111 if (!ptr) 3112 return -ENOMEM; 3113 *rcmd = ptr; 3114 ret = copy_from_user(ptr, param, sizeof(*ptr)); 3115 if (ret) 3116 return -EFAULT; 3117 ptr->next = NULL; 3118 ptr->buffer_length = 0; 3119 param += sizeof(struct floppy_raw_cmd); 3120 if (ptr->cmd_count > 33) 3121 /* the command may now also take up the space 3122 * initially intended for the reply & the 3123 * reply count. Needed for long 82078 commands 3124 * such as RESTORE, which takes ... 17 command 3125 * bytes. Murphy's law #137: When you reserve 3126 * 16 bytes for a structure, you'll one day 3127 * discover that you really need 17... 3128 */ 3129 return -EINVAL; 3130 3131 for (i = 0; i < 16; i++) 3132 ptr->reply[i] = 0; 3133 ptr->resultcode = 0; 3134 ptr->kernel_data = NULL; 3135 3136 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3137 if (ptr->length <= 0) 3138 return -EINVAL; 3139 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); 3140 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); 3141 if (!ptr->kernel_data) 3142 return -ENOMEM; 3143 ptr->buffer_length = ptr->length; 3144 } 3145 if (ptr->flags & FD_RAW_WRITE) { 3146 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); 3147 if (ret) 3148 return ret; 3149 } 3150 3151 if (ptr->flags & FD_RAW_MORE) { 3152 rcmd = &(ptr->next); 3153 ptr->rate &= 0x43; 3154 goto loop; 3155 } 3156 3157 return 0; 3158 } 3159 3160 static int raw_cmd_ioctl(int cmd, void __user *param) 3161 { 3162 struct floppy_raw_cmd *my_raw_cmd; 3163 int drive; 3164 int ret2; 3165 int ret; 3166 3167 if (FDCS->rawcmd <= 1) 3168 FDCS->rawcmd = 1; 3169 for (drive = 0; drive < N_DRIVE; drive++) { 3170 if (FDC(drive) != fdc) 3171 continue; 3172 if (drive == current_drive) { 3173 if (UDRS->fd_ref > 1) { 3174 FDCS->rawcmd = 2; 3175 break; 3176 } 3177 } else if (UDRS->fd_ref) { 3178 FDCS->rawcmd = 2; 3179 break; 3180 } 3181 } 3182 3183 if (FDCS->reset) 3184 return -EIO; 3185 3186 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); 3187 if (ret) { 3188 raw_cmd_free(&my_raw_cmd); 3189 return ret; 3190 } 3191 3192 raw_cmd = my_raw_cmd; 3193 cont = &raw_cmd_cont; 3194 ret = wait_til_done(floppy_start, true); 3195 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); 3196 3197 if (ret != -EINTR && FDCS->reset) 3198 ret = -EIO; 3199 3200 DRS->track = NO_TRACK; 3201 3202 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); 3203 if (!ret) 3204 ret = ret2; 3205 raw_cmd_free(&my_raw_cmd); 3206 return ret; 3207 } 3208 3209 static int invalidate_drive(struct block_device *bdev) 3210 { 3211 /* invalidate the buffer track to force a reread */ 3212 set_bit((long)bdev->bd_disk->private_data, &fake_change); 3213 process_fd_request(); 3214 check_disk_change(bdev); 3215 return 0; 3216 } 3217 3218 static int set_geometry(unsigned int cmd, struct floppy_struct *g, 3219 int drive, int type, struct block_device *bdev) 3220 { 3221 int cnt; 3222 3223 /* sanity checking for parameters. */ 3224 if (g->sect <= 0 || 3225 g->head <= 0 || 3226 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || 3227 /* check if reserved bits are set */ 3228 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) 3229 return -EINVAL; 3230 if (type) { 3231 if (!capable(CAP_SYS_ADMIN)) 3232 return -EPERM; 3233 mutex_lock(&open_lock); 3234 if (lock_fdc(drive, true)) { 3235 mutex_unlock(&open_lock); 3236 return -EINTR; 3237 } 3238 floppy_type[type] = *g; 3239 floppy_type[type].name = "user format"; 3240 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) 3241 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = 3242 floppy_type[type].size + 1; 3243 process_fd_request(); 3244 for (cnt = 0; cnt < N_DRIVE; cnt++) { 3245 struct block_device *bdev = opened_bdev[cnt]; 3246 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) 3247 continue; 3248 __invalidate_device(bdev, true); 3249 } 3250 mutex_unlock(&open_lock); 3251 } else { 3252 int oldStretch; 3253 3254 if (lock_fdc(drive, true)) 3255 return -EINTR; 3256 if (cmd != FDDEFPRM) { 3257 /* notice a disk change immediately, else 3258 * we lose our settings immediately*/ 3259 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3260 return -EINTR; 3261 } 3262 oldStretch = g->stretch; 3263 user_params[drive] = *g; 3264 if (buffer_drive == drive) 3265 SUPBOUND(buffer_max, user_params[drive].sect); 3266 current_type[drive] = &user_params[drive]; 3267 floppy_sizes[drive] = user_params[drive].size; 3268 if (cmd == FDDEFPRM) 3269 DRS->keep_data = -1; 3270 else 3271 DRS->keep_data = 1; 3272 /* invalidation. Invalidate only when needed, i.e. 3273 * when there are already sectors in the buffer cache 3274 * whose number will change. This is useful, because 3275 * mtools often changes the geometry of the disk after 3276 * looking at the boot block */ 3277 if (DRS->maxblock > user_params[drive].sect || 3278 DRS->maxtrack || 3279 ((user_params[drive].sect ^ oldStretch) & 3280 (FD_SWAPSIDES | FD_SECTBASEMASK))) 3281 invalidate_drive(bdev); 3282 else 3283 process_fd_request(); 3284 } 3285 return 0; 3286 } 3287 3288 /* handle obsolete ioctl's */ 3289 static unsigned int ioctl_table[] = { 3290 FDCLRPRM, 3291 FDSETPRM, 3292 FDDEFPRM, 3293 FDGETPRM, 3294 FDMSGON, 3295 FDMSGOFF, 3296 FDFMTBEG, 3297 FDFMTTRK, 3298 FDFMTEND, 3299 FDSETEMSGTRESH, 3300 FDFLUSH, 3301 FDSETMAXERRS, 3302 FDGETMAXERRS, 3303 FDGETDRVTYP, 3304 FDSETDRVPRM, 3305 FDGETDRVPRM, 3306 FDGETDRVSTAT, 3307 FDPOLLDRVSTAT, 3308 FDRESET, 3309 FDGETFDCSTAT, 3310 FDWERRORCLR, 3311 FDWERRORGET, 3312 FDRAWCMD, 3313 FDEJECT, 3314 FDTWADDLE 3315 }; 3316 3317 static int normalize_ioctl(unsigned int *cmd, int *size) 3318 { 3319 int i; 3320 3321 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { 3322 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { 3323 *size = _IOC_SIZE(*cmd); 3324 *cmd = ioctl_table[i]; 3325 if (*size > _IOC_SIZE(*cmd)) { 3326 pr_info("ioctl not yet supported\n"); 3327 return -EFAULT; 3328 } 3329 return 0; 3330 } 3331 } 3332 return -EINVAL; 3333 } 3334 3335 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) 3336 { 3337 if (type) 3338 *g = &floppy_type[type]; 3339 else { 3340 if (lock_fdc(drive, false)) 3341 return -EINTR; 3342 if (poll_drive(false, 0) == -EINTR) 3343 return -EINTR; 3344 process_fd_request(); 3345 *g = current_type[drive]; 3346 } 3347 if (!*g) 3348 return -ENODEV; 3349 return 0; 3350 } 3351 3352 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) 3353 { 3354 int drive = (long)bdev->bd_disk->private_data; 3355 int type = ITYPE(drive_state[drive].fd_device); 3356 struct floppy_struct *g; 3357 int ret; 3358 3359 ret = get_floppy_geometry(drive, type, &g); 3360 if (ret) 3361 return ret; 3362 3363 geo->heads = g->head; 3364 geo->sectors = g->sect; 3365 geo->cylinders = g->track; 3366 return 0; 3367 } 3368 3369 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 3370 unsigned long param) 3371 { 3372 int drive = (long)bdev->bd_disk->private_data; 3373 int type = ITYPE(UDRS->fd_device); 3374 int i; 3375 int ret; 3376 int size; 3377 union inparam { 3378 struct floppy_struct g; /* geometry */ 3379 struct format_descr f; 3380 struct floppy_max_errors max_errors; 3381 struct floppy_drive_params dp; 3382 } inparam; /* parameters coming from user space */ 3383 const void *outparam; /* parameters passed back to user space */ 3384 3385 /* convert compatibility eject ioctls into floppy eject ioctl. 3386 * We do this in order to provide a means to eject floppy disks before 3387 * installing the new fdutils package */ 3388 if (cmd == CDROMEJECT || /* CD-ROM eject */ 3389 cmd == 0x6470) { /* SunOS floppy eject */ 3390 DPRINT("obsolete eject ioctl\n"); 3391 DPRINT("please use floppycontrol --eject\n"); 3392 cmd = FDEJECT; 3393 } 3394 3395 if (!((cmd & 0xff00) == 0x0200)) 3396 return -EINVAL; 3397 3398 /* convert the old style command into a new style command */ 3399 ret = normalize_ioctl(&cmd, &size); 3400 if (ret) 3401 return ret; 3402 3403 /* permission checks */ 3404 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || 3405 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) 3406 return -EPERM; 3407 3408 if (WARN_ON(size < 0 || size > sizeof(inparam))) 3409 return -EINVAL; 3410 3411 /* copyin */ 3412 memset(&inparam, 0, sizeof(inparam)); 3413 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3414 ret = fd_copyin((void __user *)param, &inparam, size); 3415 if (ret) 3416 return ret; 3417 } 3418 3419 switch (cmd) { 3420 case FDEJECT: 3421 if (UDRS->fd_ref != 1) 3422 /* somebody else has this drive open */ 3423 return -EBUSY; 3424 if (lock_fdc(drive, true)) 3425 return -EINTR; 3426 3427 /* do the actual eject. Fails on 3428 * non-Sparc architectures */ 3429 ret = fd_eject(UNIT(drive)); 3430 3431 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3432 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3433 process_fd_request(); 3434 return ret; 3435 case FDCLRPRM: 3436 if (lock_fdc(drive, true)) 3437 return -EINTR; 3438 current_type[drive] = NULL; 3439 floppy_sizes[drive] = MAX_DISK_SIZE << 1; 3440 UDRS->keep_data = 0; 3441 return invalidate_drive(bdev); 3442 case FDSETPRM: 3443 case FDDEFPRM: 3444 return set_geometry(cmd, &inparam.g, drive, type, bdev); 3445 case FDGETPRM: 3446 ret = get_floppy_geometry(drive, type, 3447 (struct floppy_struct **)&outparam); 3448 if (ret) 3449 return ret; 3450 break; 3451 case FDMSGON: 3452 UDP->flags |= FTD_MSG; 3453 return 0; 3454 case FDMSGOFF: 3455 UDP->flags &= ~FTD_MSG; 3456 return 0; 3457 case FDFMTBEG: 3458 if (lock_fdc(drive, true)) 3459 return -EINTR; 3460 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3461 return -EINTR; 3462 ret = UDRS->flags; 3463 process_fd_request(); 3464 if (ret & FD_VERIFY) 3465 return -ENODEV; 3466 if (!(ret & FD_DISK_WRITABLE)) 3467 return -EROFS; 3468 return 0; 3469 case FDFMTTRK: 3470 if (UDRS->fd_ref != 1) 3471 return -EBUSY; 3472 return do_format(drive, &inparam.f); 3473 case FDFMTEND: 3474 case FDFLUSH: 3475 if (lock_fdc(drive, true)) 3476 return -EINTR; 3477 return invalidate_drive(bdev); 3478 case FDSETEMSGTRESH: 3479 UDP->max_errors.reporting = (unsigned short)(param & 0x0f); 3480 return 0; 3481 case FDGETMAXERRS: 3482 outparam = &UDP->max_errors; 3483 break; 3484 case FDSETMAXERRS: 3485 UDP->max_errors = inparam.max_errors; 3486 break; 3487 case FDGETDRVTYP: 3488 outparam = drive_name(type, drive); 3489 SUPBOUND(size, strlen((const char *)outparam) + 1); 3490 break; 3491 case FDSETDRVPRM: 3492 *UDP = inparam.dp; 3493 break; 3494 case FDGETDRVPRM: 3495 outparam = UDP; 3496 break; 3497 case FDPOLLDRVSTAT: 3498 if (lock_fdc(drive, true)) 3499 return -EINTR; 3500 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3501 return -EINTR; 3502 process_fd_request(); 3503 /* fall through */ 3504 case FDGETDRVSTAT: 3505 outparam = UDRS; 3506 break; 3507 case FDRESET: 3508 return user_reset_fdc(drive, (int)param, true); 3509 case FDGETFDCSTAT: 3510 outparam = UFDCS; 3511 break; 3512 case FDWERRORCLR: 3513 memset(UDRWE, 0, sizeof(*UDRWE)); 3514 return 0; 3515 case FDWERRORGET: 3516 outparam = UDRWE; 3517 break; 3518 case FDRAWCMD: 3519 if (type) 3520 return -EINVAL; 3521 if (lock_fdc(drive, true)) 3522 return -EINTR; 3523 set_floppy(drive); 3524 i = raw_cmd_ioctl(cmd, (void __user *)param); 3525 if (i == -EINTR) 3526 return -EINTR; 3527 process_fd_request(); 3528 return i; 3529 case FDTWADDLE: 3530 if (lock_fdc(drive, true)) 3531 return -EINTR; 3532 twaddle(); 3533 process_fd_request(); 3534 return 0; 3535 default: 3536 return -EINVAL; 3537 } 3538 3539 if (_IOC_DIR(cmd) & _IOC_READ) 3540 return fd_copyout((void __user *)param, outparam, size); 3541 3542 return 0; 3543 } 3544 3545 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 3546 unsigned int cmd, unsigned long param) 3547 { 3548 int ret; 3549 3550 mutex_lock(&floppy_mutex); 3551 ret = fd_locked_ioctl(bdev, mode, cmd, param); 3552 mutex_unlock(&floppy_mutex); 3553 3554 return ret; 3555 } 3556 3557 static void __init config_types(void) 3558 { 3559 bool has_drive = false; 3560 int drive; 3561 3562 /* read drive info out of physical CMOS */ 3563 drive = 0; 3564 if (!UDP->cmos) 3565 UDP->cmos = FLOPPY0_TYPE; 3566 drive = 1; 3567 if (!UDP->cmos && FLOPPY1_TYPE) 3568 UDP->cmos = FLOPPY1_TYPE; 3569 3570 /* FIXME: additional physical CMOS drive detection should go here */ 3571 3572 for (drive = 0; drive < N_DRIVE; drive++) { 3573 unsigned int type = UDP->cmos; 3574 struct floppy_drive_params *params; 3575 const char *name = NULL; 3576 static char temparea[32]; 3577 3578 if (type < ARRAY_SIZE(default_drive_params)) { 3579 params = &default_drive_params[type].params; 3580 if (type) { 3581 name = default_drive_params[type].name; 3582 allowed_drive_mask |= 1 << drive; 3583 } else 3584 allowed_drive_mask &= ~(1 << drive); 3585 } else { 3586 params = &default_drive_params[0].params; 3587 sprintf(temparea, "unknown type %d (usb?)", type); 3588 name = temparea; 3589 } 3590 if (name) { 3591 const char *prepend; 3592 if (!has_drive) { 3593 prepend = ""; 3594 has_drive = true; 3595 pr_info("Floppy drive(s):"); 3596 } else { 3597 prepend = ","; 3598 } 3599 3600 pr_cont("%s fd%d is %s", prepend, drive, name); 3601 } 3602 *UDP = *params; 3603 } 3604 3605 if (has_drive) 3606 pr_cont("\n"); 3607 } 3608 3609 static int floppy_release(struct gendisk *disk, fmode_t mode) 3610 { 3611 int drive = (long)disk->private_data; 3612 3613 mutex_lock(&floppy_mutex); 3614 mutex_lock(&open_lock); 3615 if (UDRS->fd_ref < 0) 3616 UDRS->fd_ref = 0; 3617 else if (!UDRS->fd_ref--) { 3618 DPRINT("floppy_release with fd_ref == 0"); 3619 UDRS->fd_ref = 0; 3620 } 3621 if (!UDRS->fd_ref) 3622 opened_bdev[drive] = NULL; 3623 mutex_unlock(&open_lock); 3624 mutex_unlock(&floppy_mutex); 3625 3626 return 0; 3627 } 3628 3629 /* 3630 * floppy_open check for aliasing (/dev/fd0 can be the same as 3631 * /dev/PS0 etc), and disallows simultaneous access to the same 3632 * drive with different device numbers. 3633 */ 3634 static int floppy_open(struct block_device *bdev, fmode_t mode) 3635 { 3636 int drive = (long)bdev->bd_disk->private_data; 3637 int old_dev, new_dev; 3638 int try; 3639 int res = -EBUSY; 3640 char *tmp; 3641 3642 mutex_lock(&floppy_mutex); 3643 mutex_lock(&open_lock); 3644 old_dev = UDRS->fd_device; 3645 if (opened_bdev[drive] && opened_bdev[drive] != bdev) 3646 goto out2; 3647 3648 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { 3649 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3650 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3651 } 3652 3653 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL))) 3654 goto out2; 3655 3656 if (mode & FMODE_EXCL) 3657 UDRS->fd_ref = -1; 3658 else 3659 UDRS->fd_ref++; 3660 3661 opened_bdev[drive] = bdev; 3662 3663 res = -ENXIO; 3664 3665 if (!floppy_track_buffer) { 3666 /* if opening an ED drive, reserve a big buffer, 3667 * else reserve a small one */ 3668 if ((UDP->cmos == 6) || (UDP->cmos == 5)) 3669 try = 64; /* Only 48 actually useful */ 3670 else 3671 try = 32; /* Only 24 actually useful */ 3672 3673 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3674 if (!tmp && !floppy_track_buffer) { 3675 try >>= 1; /* buffer only one side */ 3676 INFBOUND(try, 16); 3677 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3678 } 3679 if (!tmp && !floppy_track_buffer) 3680 fallback_on_nodma_alloc(&tmp, 2048 * try); 3681 if (!tmp && !floppy_track_buffer) { 3682 DPRINT("Unable to allocate DMA memory\n"); 3683 goto out; 3684 } 3685 if (floppy_track_buffer) { 3686 if (tmp) 3687 fd_dma_mem_free((unsigned long)tmp, try * 1024); 3688 } else { 3689 buffer_min = buffer_max = -1; 3690 floppy_track_buffer = tmp; 3691 max_buffer_sectors = try; 3692 } 3693 } 3694 3695 new_dev = MINOR(bdev->bd_dev); 3696 UDRS->fd_device = new_dev; 3697 set_capacity(disks[drive], floppy_sizes[new_dev]); 3698 if (old_dev != -1 && old_dev != new_dev) { 3699 if (buffer_drive == drive) 3700 buffer_track = -1; 3701 } 3702 3703 if (UFDCS->rawcmd == 1) 3704 UFDCS->rawcmd = 2; 3705 3706 if (!(mode & FMODE_NDELAY)) { 3707 if (mode & (FMODE_READ|FMODE_WRITE)) { 3708 UDRS->last_checked = 0; 3709 check_disk_change(bdev); 3710 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) 3711 goto out; 3712 } 3713 res = -EROFS; 3714 if ((mode & FMODE_WRITE) && 3715 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) 3716 goto out; 3717 } 3718 mutex_unlock(&open_lock); 3719 mutex_unlock(&floppy_mutex); 3720 return 0; 3721 out: 3722 if (UDRS->fd_ref < 0) 3723 UDRS->fd_ref = 0; 3724 else 3725 UDRS->fd_ref--; 3726 if (!UDRS->fd_ref) 3727 opened_bdev[drive] = NULL; 3728 out2: 3729 mutex_unlock(&open_lock); 3730 mutex_unlock(&floppy_mutex); 3731 return res; 3732 } 3733 3734 /* 3735 * Check if the disk has been changed or if a change has been faked. 3736 */ 3737 static unsigned int floppy_check_events(struct gendisk *disk, 3738 unsigned int clearing) 3739 { 3740 int drive = (long)disk->private_data; 3741 3742 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3743 test_bit(FD_VERIFY_BIT, &UDRS->flags)) 3744 return DISK_EVENT_MEDIA_CHANGE; 3745 3746 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { 3747 lock_fdc(drive, false); 3748 poll_drive(false, 0); 3749 process_fd_request(); 3750 } 3751 3752 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3753 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3754 test_bit(drive, &fake_change) || 3755 drive_no_geom(drive)) 3756 return DISK_EVENT_MEDIA_CHANGE; 3757 return 0; 3758 } 3759 3760 /* 3761 * This implements "read block 0" for floppy_revalidate(). 3762 * Needed for format autodetection, checking whether there is 3763 * a disk in the drive, and whether that disk is writable. 3764 */ 3765 3766 static void floppy_rb0_complete(struct bio *bio, int err) 3767 { 3768 complete((struct completion *)bio->bi_private); 3769 } 3770 3771 static int __floppy_read_block_0(struct block_device *bdev) 3772 { 3773 struct bio bio; 3774 struct bio_vec bio_vec; 3775 struct completion complete; 3776 struct page *page; 3777 size_t size; 3778 3779 page = alloc_page(GFP_NOIO); 3780 if (!page) { 3781 process_fd_request(); 3782 return -ENOMEM; 3783 } 3784 3785 size = bdev->bd_block_size; 3786 if (!size) 3787 size = 1024; 3788 3789 bio_init(&bio); 3790 bio.bi_io_vec = &bio_vec; 3791 bio_vec.bv_page = page; 3792 bio_vec.bv_len = size; 3793 bio_vec.bv_offset = 0; 3794 bio.bi_vcnt = 1; 3795 bio.bi_idx = 0; 3796 bio.bi_size = size; 3797 bio.bi_bdev = bdev; 3798 bio.bi_sector = 0; 3799 bio.bi_flags = (1 << BIO_QUIET); 3800 init_completion(&complete); 3801 bio.bi_private = &complete; 3802 bio.bi_end_io = floppy_rb0_complete; 3803 3804 submit_bio(READ, &bio); 3805 process_fd_request(); 3806 wait_for_completion(&complete); 3807 3808 __free_page(page); 3809 3810 return 0; 3811 } 3812 3813 /* revalidate the floppy disk, i.e. trigger format autodetection by reading 3814 * the bootblock (block 0). "Autodetection" is also needed to check whether 3815 * there is a disk in the drive at all... Thus we also do it for fixed 3816 * geometry formats */ 3817 static int floppy_revalidate(struct gendisk *disk) 3818 { 3819 int drive = (long)disk->private_data; 3820 int cf; 3821 int res = 0; 3822 3823 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3824 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3825 test_bit(drive, &fake_change) || 3826 drive_no_geom(drive)) { 3827 if (WARN(atomic_read(&usage_count) == 0, 3828 "VFS: revalidate called on non-open device.\n")) 3829 return -EFAULT; 3830 3831 lock_fdc(drive, false); 3832 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3833 test_bit(FD_VERIFY_BIT, &UDRS->flags)); 3834 if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { 3835 process_fd_request(); /*already done by another thread */ 3836 return 0; 3837 } 3838 UDRS->maxblock = 0; 3839 UDRS->maxtrack = 0; 3840 if (buffer_drive == drive) 3841 buffer_track = -1; 3842 clear_bit(drive, &fake_change); 3843 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3844 if (cf) 3845 UDRS->generation++; 3846 if (drive_no_geom(drive)) { 3847 /* auto-sensing */ 3848 res = __floppy_read_block_0(opened_bdev[drive]); 3849 } else { 3850 if (cf) 3851 poll_drive(false, FD_RAW_NEED_DISK); 3852 process_fd_request(); 3853 } 3854 } 3855 set_capacity(disk, floppy_sizes[UDRS->fd_device]); 3856 return res; 3857 } 3858 3859 static const struct block_device_operations floppy_fops = { 3860 .owner = THIS_MODULE, 3861 .open = floppy_open, 3862 .release = floppy_release, 3863 .ioctl = fd_ioctl, 3864 .getgeo = fd_getgeo, 3865 .check_events = floppy_check_events, 3866 .revalidate_disk = floppy_revalidate, 3867 }; 3868 3869 /* 3870 * Floppy Driver initialization 3871 * ============================= 3872 */ 3873 3874 /* Determine the floppy disk controller type */ 3875 /* This routine was written by David C. Niemi */ 3876 static char __init get_fdc_version(void) 3877 { 3878 int r; 3879 3880 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ 3881 if (FDCS->reset) 3882 return FDC_NONE; 3883 r = result(); 3884 if (r <= 0x00) 3885 return FDC_NONE; /* No FDC present ??? */ 3886 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3887 pr_info("FDC %d is an 8272A\n", fdc); 3888 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ 3889 } 3890 if (r != 10) { 3891 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", 3892 fdc, r); 3893 return FDC_UNKNOWN; 3894 } 3895 3896 if (!fdc_configure()) { 3897 pr_info("FDC %d is an 82072\n", fdc); 3898 return FDC_82072; /* 82072 doesn't know CONFIGURE */ 3899 } 3900 3901 output_byte(FD_PERPENDICULAR); 3902 if (need_more_output() == MORE_OUTPUT) { 3903 output_byte(0); 3904 } else { 3905 pr_info("FDC %d is an 82072A\n", fdc); 3906 return FDC_82072A; /* 82072A as found on Sparcs. */ 3907 } 3908 3909 output_byte(FD_UNLOCK); 3910 r = result(); 3911 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3912 pr_info("FDC %d is a pre-1991 82077\n", fdc); 3913 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know 3914 * LOCK/UNLOCK */ 3915 } 3916 if ((r != 1) || (reply_buffer[0] != 0x00)) { 3917 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", 3918 fdc, r); 3919 return FDC_UNKNOWN; 3920 } 3921 output_byte(FD_PARTID); 3922 r = result(); 3923 if (r != 1) { 3924 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", 3925 fdc, r); 3926 return FDC_UNKNOWN; 3927 } 3928 if (reply_buffer[0] == 0x80) { 3929 pr_info("FDC %d is a post-1991 82077\n", fdc); 3930 return FDC_82077; /* Revised 82077AA passes all the tests */ 3931 } 3932 switch (reply_buffer[0] >> 5) { 3933 case 0x0: 3934 /* Either a 82078-1 or a 82078SL running at 5Volt */ 3935 pr_info("FDC %d is an 82078.\n", fdc); 3936 return FDC_82078; 3937 case 0x1: 3938 pr_info("FDC %d is a 44pin 82078\n", fdc); 3939 return FDC_82078; 3940 case 0x2: 3941 pr_info("FDC %d is a S82078B\n", fdc); 3942 return FDC_S82078B; 3943 case 0x3: 3944 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); 3945 return FDC_87306; 3946 default: 3947 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", 3948 fdc, reply_buffer[0] >> 5); 3949 return FDC_82078_UNKN; 3950 } 3951 } /* get_fdc_version */ 3952 3953 /* lilo configuration */ 3954 3955 static void __init floppy_set_flags(int *ints, int param, int param2) 3956 { 3957 int i; 3958 3959 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3960 if (param) 3961 default_drive_params[i].params.flags |= param2; 3962 else 3963 default_drive_params[i].params.flags &= ~param2; 3964 } 3965 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); 3966 } 3967 3968 static void __init daring(int *ints, int param, int param2) 3969 { 3970 int i; 3971 3972 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3973 if (param) { 3974 default_drive_params[i].params.select_delay = 0; 3975 default_drive_params[i].params.flags |= 3976 FD_SILENT_DCL_CLEAR; 3977 } else { 3978 default_drive_params[i].params.select_delay = 3979 2 * HZ / 100; 3980 default_drive_params[i].params.flags &= 3981 ~FD_SILENT_DCL_CLEAR; 3982 } 3983 } 3984 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); 3985 } 3986 3987 static void __init set_cmos(int *ints, int dummy, int dummy2) 3988 { 3989 int current_drive = 0; 3990 3991 if (ints[0] != 2) { 3992 DPRINT("wrong number of parameters for CMOS\n"); 3993 return; 3994 } 3995 current_drive = ints[1]; 3996 if (current_drive < 0 || current_drive >= 8) { 3997 DPRINT("bad drive for set_cmos\n"); 3998 return; 3999 } 4000 #if N_FDC > 1 4001 if (current_drive >= 4 && !FDC2) 4002 FDC2 = 0x370; 4003 #endif 4004 DP->cmos = ints[2]; 4005 DPRINT("setting CMOS code to %d\n", ints[2]); 4006 } 4007 4008 static struct param_table { 4009 const char *name; 4010 void (*fn) (int *ints, int param, int param2); 4011 int *var; 4012 int def_param; 4013 int param2; 4014 } config_params[] __initdata = { 4015 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4016 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4017 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, 4018 {"irq", NULL, &FLOPPY_IRQ, 6, 0}, 4019 {"dma", NULL, &FLOPPY_DMA, 2, 0}, 4020 {"daring", daring, NULL, 1, 0}, 4021 #if N_FDC > 1 4022 {"two_fdc", NULL, &FDC2, 0x370, 0}, 4023 {"one_fdc", NULL, &FDC2, 0, 0}, 4024 #endif 4025 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, 4026 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, 4027 {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, 4028 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, 4029 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, 4030 {"nodma", NULL, &can_use_virtual_dma, 1, 0}, 4031 {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, 4032 {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, 4033 {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, 4034 {"nofifo", NULL, &no_fifo, 0x20, 0}, 4035 {"usefifo", NULL, &no_fifo, 0, 0}, 4036 {"cmos", set_cmos, NULL, 0, 0}, 4037 {"slow", NULL, &slow_floppy, 1, 0}, 4038 {"unexpected_interrupts", NULL, &print_unex, 1, 0}, 4039 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, 4040 {"L40SX", NULL, &print_unex, 0, 0} 4041 4042 EXTRA_FLOPPY_PARAMS 4043 }; 4044 4045 static int __init floppy_setup(char *str) 4046 { 4047 int i; 4048 int param; 4049 int ints[11]; 4050 4051 str = get_options(str, ARRAY_SIZE(ints), ints); 4052 if (str) { 4053 for (i = 0; i < ARRAY_SIZE(config_params); i++) { 4054 if (strcmp(str, config_params[i].name) == 0) { 4055 if (ints[0]) 4056 param = ints[1]; 4057 else 4058 param = config_params[i].def_param; 4059 if (config_params[i].fn) 4060 config_params[i].fn(ints, param, 4061 config_params[i]. 4062 param2); 4063 if (config_params[i].var) { 4064 DPRINT("%s=%d\n", str, param); 4065 *config_params[i].var = param; 4066 } 4067 return 1; 4068 } 4069 } 4070 } 4071 if (str) { 4072 DPRINT("unknown floppy option [%s]\n", str); 4073 4074 DPRINT("allowed options are:"); 4075 for (i = 0; i < ARRAY_SIZE(config_params); i++) 4076 pr_cont(" %s", config_params[i].name); 4077 pr_cont("\n"); 4078 } else 4079 DPRINT("botched floppy option\n"); 4080 DPRINT("Read Documentation/blockdev/floppy.txt\n"); 4081 return 0; 4082 } 4083 4084 static int have_no_fdc = -ENODEV; 4085 4086 static ssize_t floppy_cmos_show(struct device *dev, 4087 struct device_attribute *attr, char *buf) 4088 { 4089 struct platform_device *p = to_platform_device(dev); 4090 int drive; 4091 4092 drive = p->id; 4093 return sprintf(buf, "%X\n", UDP->cmos); 4094 } 4095 4096 static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); 4097 4098 static void floppy_device_release(struct device *dev) 4099 { 4100 } 4101 4102 static int floppy_resume(struct device *dev) 4103 { 4104 int fdc; 4105 4106 for (fdc = 0; fdc < N_FDC; fdc++) 4107 if (FDCS->address != -1) 4108 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4109 4110 return 0; 4111 } 4112 4113 static const struct dev_pm_ops floppy_pm_ops = { 4114 .resume = floppy_resume, 4115 .restore = floppy_resume, 4116 }; 4117 4118 static struct platform_driver floppy_driver = { 4119 .driver = { 4120 .name = "floppy", 4121 .pm = &floppy_pm_ops, 4122 }, 4123 }; 4124 4125 static struct platform_device floppy_device[N_DRIVE]; 4126 4127 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 4128 { 4129 int drive = (*part & 3) | ((*part & 0x80) >> 5); 4130 if (drive >= N_DRIVE || 4131 !(allowed_drive_mask & (1 << drive)) || 4132 fdc_state[FDC(drive)].version == FDC_NONE) 4133 return NULL; 4134 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) 4135 return NULL; 4136 *part = 0; 4137 return get_disk(disks[drive]); 4138 } 4139 4140 static int __init floppy_init(void) 4141 { 4142 int i, unit, drive; 4143 int err, dr; 4144 4145 set_debugt(); 4146 interruptjiffies = resultjiffies = jiffies; 4147 4148 #if defined(CONFIG_PPC) 4149 if (check_legacy_ioport(FDC1)) 4150 return -ENODEV; 4151 #endif 4152 4153 raw_cmd = NULL; 4154 4155 for (dr = 0; dr < N_DRIVE; dr++) { 4156 disks[dr] = alloc_disk(1); 4157 if (!disks[dr]) { 4158 err = -ENOMEM; 4159 goto out_put_disk; 4160 } 4161 4162 disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock); 4163 if (!disks[dr]->queue) { 4164 err = -ENOMEM; 4165 goto out_put_disk; 4166 } 4167 4168 blk_queue_max_hw_sectors(disks[dr]->queue, 64); 4169 disks[dr]->major = FLOPPY_MAJOR; 4170 disks[dr]->first_minor = TOMINOR(dr); 4171 disks[dr]->fops = &floppy_fops; 4172 sprintf(disks[dr]->disk_name, "fd%d", dr); 4173 4174 init_timer(&motor_off_timer[dr]); 4175 motor_off_timer[dr].data = dr; 4176 motor_off_timer[dr].function = motor_off_callback; 4177 } 4178 4179 err = register_blkdev(FLOPPY_MAJOR, "fd"); 4180 if (err) 4181 goto out_put_disk; 4182 4183 err = platform_driver_register(&floppy_driver); 4184 if (err) 4185 goto out_unreg_blkdev; 4186 4187 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 4188 floppy_find, NULL, NULL); 4189 4190 for (i = 0; i < 256; i++) 4191 if (ITYPE(i)) 4192 floppy_sizes[i] = floppy_type[ITYPE(i)].size; 4193 else 4194 floppy_sizes[i] = MAX_DISK_SIZE << 1; 4195 4196 reschedule_timeout(MAXTIMEOUT, "floppy init"); 4197 config_types(); 4198 4199 for (i = 0; i < N_FDC; i++) { 4200 fdc = i; 4201 memset(FDCS, 0, sizeof(*FDCS)); 4202 FDCS->dtr = -1; 4203 FDCS->dor = 0x4; 4204 #if defined(__sparc__) || defined(__mc68000__) 4205 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ 4206 #ifdef __mc68000__ 4207 if (MACH_IS_SUN3X) 4208 #endif 4209 FDCS->version = FDC_82072A; 4210 #endif 4211 } 4212 4213 use_virtual_dma = can_use_virtual_dma & 1; 4214 fdc_state[0].address = FDC1; 4215 if (fdc_state[0].address == -1) { 4216 del_timer_sync(&fd_timeout); 4217 err = -ENODEV; 4218 goto out_unreg_region; 4219 } 4220 #if N_FDC > 1 4221 fdc_state[1].address = FDC2; 4222 #endif 4223 4224 fdc = 0; /* reset fdc in case of unexpected interrupt */ 4225 err = floppy_grab_irq_and_dma(); 4226 if (err) { 4227 del_timer_sync(&fd_timeout); 4228 err = -EBUSY; 4229 goto out_unreg_region; 4230 } 4231 4232 /* initialise drive state */ 4233 for (drive = 0; drive < N_DRIVE; drive++) { 4234 memset(UDRS, 0, sizeof(*UDRS)); 4235 memset(UDRWE, 0, sizeof(*UDRWE)); 4236 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 4237 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 4238 set_bit(FD_VERIFY_BIT, &UDRS->flags); 4239 UDRS->fd_device = -1; 4240 floppy_track_buffer = NULL; 4241 max_buffer_sectors = 0; 4242 } 4243 /* 4244 * Small 10 msec delay to let through any interrupt that 4245 * initialization might have triggered, to not 4246 * confuse detection: 4247 */ 4248 msleep(10); 4249 4250 for (i = 0; i < N_FDC; i++) { 4251 fdc = i; 4252 FDCS->driver_version = FD_DRIVER_VERSION; 4253 for (unit = 0; unit < 4; unit++) 4254 FDCS->track[unit] = 0; 4255 if (FDCS->address == -1) 4256 continue; 4257 FDCS->rawcmd = 2; 4258 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { 4259 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4260 floppy_release_regions(fdc); 4261 FDCS->address = -1; 4262 FDCS->version = FDC_NONE; 4263 continue; 4264 } 4265 /* Try to determine the floppy controller type */ 4266 FDCS->version = get_fdc_version(); 4267 if (FDCS->version == FDC_NONE) { 4268 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4269 floppy_release_regions(fdc); 4270 FDCS->address = -1; 4271 continue; 4272 } 4273 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) 4274 can_use_virtual_dma = 0; 4275 4276 have_no_fdc = 0; 4277 /* Not all FDCs seem to be able to handle the version command 4278 * properly, so force a reset for the standard FDC clones, 4279 * to avoid interrupt garbage. 4280 */ 4281 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4282 } 4283 fdc = 0; 4284 del_timer_sync(&fd_timeout); 4285 current_drive = 0; 4286 initialized = true; 4287 if (have_no_fdc) { 4288 DPRINT("no floppy controllers found\n"); 4289 err = have_no_fdc; 4290 goto out_flush_work; 4291 } 4292 4293 for (drive = 0; drive < N_DRIVE; drive++) { 4294 if (!(allowed_drive_mask & (1 << drive))) 4295 continue; 4296 if (fdc_state[FDC(drive)].version == FDC_NONE) 4297 continue; 4298 4299 floppy_device[drive].name = floppy_device_name; 4300 floppy_device[drive].id = drive; 4301 floppy_device[drive].dev.release = floppy_device_release; 4302 4303 err = platform_device_register(&floppy_device[drive]); 4304 if (err) 4305 goto out_flush_work; 4306 4307 err = device_create_file(&floppy_device[drive].dev, 4308 &dev_attr_cmos); 4309 if (err) 4310 goto out_unreg_platform_dev; 4311 4312 /* to be cleaned up... */ 4313 disks[drive]->private_data = (void *)(long)drive; 4314 disks[drive]->flags |= GENHD_FL_REMOVABLE; 4315 disks[drive]->driverfs_dev = &floppy_device[drive].dev; 4316 add_disk(disks[drive]); 4317 } 4318 4319 return 0; 4320 4321 out_unreg_platform_dev: 4322 platform_device_unregister(&floppy_device[drive]); 4323 out_flush_work: 4324 flush_work_sync(&floppy_work); 4325 if (atomic_read(&usage_count)) 4326 floppy_release_irq_and_dma(); 4327 out_unreg_region: 4328 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4329 platform_driver_unregister(&floppy_driver); 4330 out_unreg_blkdev: 4331 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4332 out_put_disk: 4333 while (dr--) { 4334 del_timer_sync(&motor_off_timer[dr]); 4335 if (disks[dr]->queue) { 4336 blk_cleanup_queue(disks[dr]->queue); 4337 /* 4338 * put_disk() is not paired with add_disk() and 4339 * will put queue reference one extra time. fix it. 4340 */ 4341 disks[dr]->queue = NULL; 4342 } 4343 put_disk(disks[dr]); 4344 } 4345 return err; 4346 } 4347 4348 static const struct io_region { 4349 int offset; 4350 int size; 4351 } io_regions[] = { 4352 { 2, 1 }, 4353 /* address + 3 is sometimes reserved by pnp bios for motherboard */ 4354 { 4, 2 }, 4355 /* address + 6 is reserved, and may be taken by IDE. 4356 * Unfortunately, Adaptec doesn't know this :-(, */ 4357 { 7, 1 }, 4358 }; 4359 4360 static void floppy_release_allocated_regions(int fdc, const struct io_region *p) 4361 { 4362 while (p != io_regions) { 4363 p--; 4364 release_region(FDCS->address + p->offset, p->size); 4365 } 4366 } 4367 4368 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) 4369 4370 static int floppy_request_regions(int fdc) 4371 { 4372 const struct io_region *p; 4373 4374 for (p = io_regions; p < ARRAY_END(io_regions); p++) { 4375 if (!request_region(FDCS->address + p->offset, 4376 p->size, "floppy")) { 4377 DPRINT("Floppy io-port 0x%04lx in use\n", 4378 FDCS->address + p->offset); 4379 floppy_release_allocated_regions(fdc, p); 4380 return -EBUSY; 4381 } 4382 } 4383 return 0; 4384 } 4385 4386 static void floppy_release_regions(int fdc) 4387 { 4388 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); 4389 } 4390 4391 static int floppy_grab_irq_and_dma(void) 4392 { 4393 if (atomic_inc_return(&usage_count) > 1) 4394 return 0; 4395 4396 /* 4397 * We might have scheduled a free_irq(), wait it to 4398 * drain first: 4399 */ 4400 flush_work_sync(&floppy_work); 4401 4402 if (fd_request_irq()) { 4403 DPRINT("Unable to grab IRQ%d for the floppy driver\n", 4404 FLOPPY_IRQ); 4405 atomic_dec(&usage_count); 4406 return -1; 4407 } 4408 if (fd_request_dma()) { 4409 DPRINT("Unable to grab DMA%d for the floppy driver\n", 4410 FLOPPY_DMA); 4411 if (can_use_virtual_dma & 2) 4412 use_virtual_dma = can_use_virtual_dma = 1; 4413 if (!(can_use_virtual_dma & 1)) { 4414 fd_free_irq(); 4415 atomic_dec(&usage_count); 4416 return -1; 4417 } 4418 } 4419 4420 for (fdc = 0; fdc < N_FDC; fdc++) { 4421 if (FDCS->address != -1) { 4422 if (floppy_request_regions(fdc)) 4423 goto cleanup; 4424 } 4425 } 4426 for (fdc = 0; fdc < N_FDC; fdc++) { 4427 if (FDCS->address != -1) { 4428 reset_fdc_info(1); 4429 fd_outb(FDCS->dor, FD_DOR); 4430 } 4431 } 4432 fdc = 0; 4433 set_dor(0, ~0, 8); /* avoid immediate interrupt */ 4434 4435 for (fdc = 0; fdc < N_FDC; fdc++) 4436 if (FDCS->address != -1) 4437 fd_outb(FDCS->dor, FD_DOR); 4438 /* 4439 * The driver will try and free resources and relies on us 4440 * to know if they were allocated or not. 4441 */ 4442 fdc = 0; 4443 irqdma_allocated = 1; 4444 return 0; 4445 cleanup: 4446 fd_free_irq(); 4447 fd_free_dma(); 4448 while (--fdc >= 0) 4449 floppy_release_regions(fdc); 4450 atomic_dec(&usage_count); 4451 return -1; 4452 } 4453 4454 static void floppy_release_irq_and_dma(void) 4455 { 4456 int old_fdc; 4457 #ifndef __sparc__ 4458 int drive; 4459 #endif 4460 long tmpsize; 4461 unsigned long tmpaddr; 4462 4463 if (!atomic_dec_and_test(&usage_count)) 4464 return; 4465 4466 if (irqdma_allocated) { 4467 fd_disable_dma(); 4468 fd_free_dma(); 4469 fd_free_irq(); 4470 irqdma_allocated = 0; 4471 } 4472 set_dor(0, ~0, 8); 4473 #if N_FDC > 1 4474 set_dor(1, ~8, 0); 4475 #endif 4476 4477 if (floppy_track_buffer && max_buffer_sectors) { 4478 tmpsize = max_buffer_sectors * 1024; 4479 tmpaddr = (unsigned long)floppy_track_buffer; 4480 floppy_track_buffer = NULL; 4481 max_buffer_sectors = 0; 4482 buffer_min = buffer_max = -1; 4483 fd_dma_mem_free(tmpaddr, tmpsize); 4484 } 4485 #ifndef __sparc__ 4486 for (drive = 0; drive < N_FDC * 4; drive++) 4487 if (timer_pending(motor_off_timer + drive)) 4488 pr_info("motor off timer %d still active\n", drive); 4489 #endif 4490 4491 if (timer_pending(&fd_timeout)) 4492 pr_info("floppy timer still active:%s\n", timeout_message); 4493 if (timer_pending(&fd_timer)) 4494 pr_info("auxiliary floppy timer still active\n"); 4495 if (work_pending(&floppy_work)) 4496 pr_info("work still pending\n"); 4497 old_fdc = fdc; 4498 for (fdc = 0; fdc < N_FDC; fdc++) 4499 if (FDCS->address != -1) 4500 floppy_release_regions(fdc); 4501 fdc = old_fdc; 4502 } 4503 4504 #ifdef MODULE 4505 4506 static char *floppy; 4507 4508 static void __init parse_floppy_cfg_string(char *cfg) 4509 { 4510 char *ptr; 4511 4512 while (*cfg) { 4513 ptr = cfg; 4514 while (*cfg && *cfg != ' ' && *cfg != '\t') 4515 cfg++; 4516 if (*cfg) { 4517 *cfg = '\0'; 4518 cfg++; 4519 } 4520 if (*ptr) 4521 floppy_setup(ptr); 4522 } 4523 } 4524 4525 static int __init floppy_module_init(void) 4526 { 4527 if (floppy) 4528 parse_floppy_cfg_string(floppy); 4529 return floppy_init(); 4530 } 4531 module_init(floppy_module_init); 4532 4533 static void __exit floppy_module_exit(void) 4534 { 4535 int drive; 4536 4537 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4538 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4539 platform_driver_unregister(&floppy_driver); 4540 4541 for (drive = 0; drive < N_DRIVE; drive++) { 4542 del_timer_sync(&motor_off_timer[drive]); 4543 4544 if ((allowed_drive_mask & (1 << drive)) && 4545 fdc_state[FDC(drive)].version != FDC_NONE) { 4546 del_gendisk(disks[drive]); 4547 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); 4548 platform_device_unregister(&floppy_device[drive]); 4549 } 4550 blk_cleanup_queue(disks[drive]->queue); 4551 4552 /* 4553 * These disks have not called add_disk(). Don't put down 4554 * queue reference in put_disk(). 4555 */ 4556 if (!(allowed_drive_mask & (1 << drive)) || 4557 fdc_state[FDC(drive)].version == FDC_NONE) 4558 disks[drive]->queue = NULL; 4559 4560 put_disk(disks[drive]); 4561 } 4562 4563 del_timer_sync(&fd_timeout); 4564 del_timer_sync(&fd_timer); 4565 4566 if (atomic_read(&usage_count)) 4567 floppy_release_irq_and_dma(); 4568 4569 /* eject disk, if any */ 4570 fd_eject(0); 4571 } 4572 4573 module_exit(floppy_module_exit); 4574 4575 module_param(floppy, charp, 0); 4576 module_param(FLOPPY_IRQ, int, 0); 4577 module_param(FLOPPY_DMA, int, 0); 4578 MODULE_AUTHOR("Alain L. Knaff"); 4579 MODULE_SUPPORTED_DEVICE("fd"); 4580 MODULE_LICENSE("GPL"); 4581 4582 /* This doesn't actually get used other than for module information */ 4583 static const struct pnp_device_id floppy_pnpids[] = { 4584 {"PNP0700", 0}, 4585 {} 4586 }; 4587 4588 MODULE_DEVICE_TABLE(pnp, floppy_pnpids); 4589 4590 #else 4591 4592 __setup("floppy=", floppy_setup); 4593 module_init(floppy_init) 4594 #endif 4595 4596 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 4597