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/buffer_head.h> /* for invalidate_buffers() */ 192 #include <linux/mutex.h> 193 #include <linux/io.h> 194 #include <linux/uaccess.h> 195 196 /* 197 * PS/2 floppies have much slower step rates than regular floppies. 198 * It's been recommended that take about 1/4 of the default speed 199 * in some more extreme cases. 200 */ 201 static DEFINE_MUTEX(floppy_mutex); 202 static int slow_floppy; 203 204 #include <asm/dma.h> 205 #include <asm/irq.h> 206 #include <asm/system.h> 207 208 static int FLOPPY_IRQ = 6; 209 static int FLOPPY_DMA = 2; 210 static int can_use_virtual_dma = 2; 211 /* ======= 212 * can use virtual DMA: 213 * 0 = use of virtual DMA disallowed by config 214 * 1 = use of virtual DMA prescribed by config 215 * 2 = no virtual DMA preference configured. By default try hard DMA, 216 * but fall back on virtual DMA when not enough memory available 217 */ 218 219 static int use_virtual_dma; 220 /* ======= 221 * use virtual DMA 222 * 0 using hard DMA 223 * 1 using virtual DMA 224 * This variable is set to virtual when a DMA mem problem arises, and 225 * reset back in floppy_grab_irq_and_dma. 226 * It is not safe to reset it in other circumstances, because the floppy 227 * driver may have several buffers in use at once, and we do currently not 228 * record each buffers capabilities 229 */ 230 231 static DEFINE_SPINLOCK(floppy_lock); 232 233 static unsigned short virtual_dma_port = 0x3f0; 234 irqreturn_t floppy_interrupt(int irq, void *dev_id); 235 static int set_dor(int fdc, char mask, char data); 236 237 #define K_64 0x10000 /* 64KB */ 238 239 /* the following is the mask of allowed drives. By default units 2 and 240 * 3 of both floppy controllers are disabled, because switching on the 241 * motor of these drives causes system hangs on some PCI computers. drive 242 * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if 243 * a drive is allowed. 244 * 245 * NOTE: This must come before we include the arch floppy header because 246 * some ports reference this variable from there. -DaveM 247 */ 248 249 static int allowed_drive_mask = 0x33; 250 251 #include <asm/floppy.h> 252 253 static int irqdma_allocated; 254 255 #include <linux/blkdev.h> 256 #include <linux/blkpg.h> 257 #include <linux/cdrom.h> /* for the compatibility eject ioctl */ 258 #include <linux/completion.h> 259 260 static struct request *current_req; 261 static void do_fd_request(struct request_queue *q); 262 static int set_next_request(void); 263 264 #ifndef fd_get_dma_residue 265 #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) 266 #endif 267 268 /* Dma Memory related stuff */ 269 270 #ifndef fd_dma_mem_free 271 #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) 272 #endif 273 274 #ifndef fd_dma_mem_alloc 275 #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) 276 #endif 277 278 static inline void fallback_on_nodma_alloc(char **addr, size_t l) 279 { 280 #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA 281 if (*addr) 282 return; /* we have the memory */ 283 if (can_use_virtual_dma != 2) 284 return; /* no fallback allowed */ 285 pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); 286 *addr = (char *)nodma_mem_alloc(l); 287 #else 288 return; 289 #endif 290 } 291 292 /* End dma memory related stuff */ 293 294 static unsigned long fake_change; 295 static bool initialized; 296 297 #define ITYPE(x) (((x) >> 2) & 0x1f) 298 #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) 299 #define UNIT(x) ((x) & 0x03) /* drive on fdc */ 300 #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ 301 /* reverse mapping from unit and fdc to drive */ 302 #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) 303 304 #define DP (&drive_params[current_drive]) 305 #define DRS (&drive_state[current_drive]) 306 #define DRWE (&write_errors[current_drive]) 307 #define FDCS (&fdc_state[fdc]) 308 309 #define UDP (&drive_params[drive]) 310 #define UDRS (&drive_state[drive]) 311 #define UDRWE (&write_errors[drive]) 312 #define UFDCS (&fdc_state[FDC(drive)]) 313 314 #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) 315 #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) 316 317 /* read/write */ 318 #define COMMAND (raw_cmd->cmd[0]) 319 #define DR_SELECT (raw_cmd->cmd[1]) 320 #define TRACK (raw_cmd->cmd[2]) 321 #define HEAD (raw_cmd->cmd[3]) 322 #define SECTOR (raw_cmd->cmd[4]) 323 #define SIZECODE (raw_cmd->cmd[5]) 324 #define SECT_PER_TRACK (raw_cmd->cmd[6]) 325 #define GAP (raw_cmd->cmd[7]) 326 #define SIZECODE2 (raw_cmd->cmd[8]) 327 #define NR_RW 9 328 329 /* format */ 330 #define F_SIZECODE (raw_cmd->cmd[2]) 331 #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) 332 #define F_GAP (raw_cmd->cmd[4]) 333 #define F_FILL (raw_cmd->cmd[5]) 334 #define NR_F 6 335 336 /* 337 * Maximum disk size (in kilobytes). 338 * This default is used whenever the current disk size is unknown. 339 * [Now it is rather a minimum] 340 */ 341 #define MAX_DISK_SIZE 4 /* 3984 */ 342 343 /* 344 * globals used by 'result()' 345 */ 346 #define MAX_REPLIES 16 347 static unsigned char reply_buffer[MAX_REPLIES]; 348 static int inr; /* size of reply buffer, when called from interrupt */ 349 #define ST0 (reply_buffer[0]) 350 #define ST1 (reply_buffer[1]) 351 #define ST2 (reply_buffer[2]) 352 #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ 353 #define R_TRACK (reply_buffer[3]) 354 #define R_HEAD (reply_buffer[4]) 355 #define R_SECTOR (reply_buffer[5]) 356 #define R_SIZECODE (reply_buffer[6]) 357 358 #define SEL_DLY (2 * HZ / 100) 359 360 /* 361 * this struct defines the different floppy drive types. 362 */ 363 static struct { 364 struct floppy_drive_params params; 365 const char *name; /* name printed while booting */ 366 } default_drive_params[] = { 367 /* NOTE: the time values in jiffies should be in msec! 368 CMOS drive type 369 | Maximum data rate supported by drive type 370 | | Head load time, msec 371 | | | Head unload time, msec (not used) 372 | | | | Step rate interval, usec 373 | | | | | Time needed for spinup time (jiffies) 374 | | | | | | Timeout for spinning down (jiffies) 375 | | | | | | | Spindown offset (where disk stops) 376 | | | | | | | | Select delay 377 | | | | | | | | | RPS 378 | | | | | | | | | | Max number of tracks 379 | | | | | | | | | | | Interrupt timeout 380 | | | | | | | | | | | | Max nonintlv. sectors 381 | | | | | | | | | | | | | -Max Errors- flags */ 382 {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, 383 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, 384 385 {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, 386 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ 387 388 {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, 389 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ 390 391 {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 392 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ 393 394 {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, 395 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ 396 397 {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 398 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ 399 400 {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, 401 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ 402 /* | --autodetected formats--- | | | 403 * read_track | | Name printed when booting 404 * | Native format 405 * Frequency of disk change checks */ 406 }; 407 408 static struct floppy_drive_params drive_params[N_DRIVE]; 409 static struct floppy_drive_struct drive_state[N_DRIVE]; 410 static struct floppy_write_errors write_errors[N_DRIVE]; 411 static struct timer_list motor_off_timer[N_DRIVE]; 412 static struct gendisk *disks[N_DRIVE]; 413 static struct block_device *opened_bdev[N_DRIVE]; 414 static DEFINE_MUTEX(open_lock); 415 static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; 416 static int fdc_queue; 417 418 /* 419 * This struct defines the different floppy types. 420 * 421 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some 422 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' 423 * tells if the disk is in Commodore 1581 format, which means side 0 sectors 424 * are located on side 1 of the disk but with a side 0 ID, and vice-versa. 425 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the 426 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical 427 * side 0 is on physical side 0 (but with the misnamed sector IDs). 428 * 'stretch' should probably be renamed to something more general, like 429 * 'options'. 430 * 431 * Bits 2 through 9 of 'stretch' tell the number of the first sector. 432 * The LSB (bit 2) is flipped. For most disks, the first sector 433 * is 1 (represented by 0x00<<2). For some CP/M and music sampler 434 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). 435 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). 436 * 437 * Other parameters should be self-explanatory (see also setfdprm(8)). 438 */ 439 /* 440 Size 441 | Sectors per track 442 | | Head 443 | | | Tracks 444 | | | | Stretch 445 | | | | | Gap 1 size 446 | | | | | | Data rate, | 0x40 for perp 447 | | | | | | | Spec1 (stepping rate, head unload 448 | | | | | | | | /fmt gap (gap2) */ 449 static struct floppy_struct floppy_type[32] = { 450 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ 451 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ 452 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ 453 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ 454 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ 455 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ 456 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ 457 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ 458 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ 459 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ 460 461 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ 462 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ 463 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ 464 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ 465 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ 466 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ 467 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ 468 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ 469 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ 470 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ 471 472 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ 473 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ 474 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ 475 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ 476 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ 477 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ 478 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ 479 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ 480 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ 481 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ 482 483 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ 484 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ 485 }; 486 487 #define SECTSIZE (_FD_SECTSIZE(*floppy)) 488 489 /* Auto-detection: Disk type used until the next media change occurs. */ 490 static struct floppy_struct *current_type[N_DRIVE]; 491 492 /* 493 * User-provided type information. current_type points to 494 * the respective entry of this array. 495 */ 496 static struct floppy_struct user_params[N_DRIVE]; 497 498 static sector_t floppy_sizes[256]; 499 500 static char floppy_device_name[] = "floppy"; 501 502 /* 503 * The driver is trying to determine the correct media format 504 * while probing is set. rw_interrupt() clears it after a 505 * successful access. 506 */ 507 static int probing; 508 509 /* Synchronization of FDC access. */ 510 #define FD_COMMAND_NONE -1 511 #define FD_COMMAND_ERROR 2 512 #define FD_COMMAND_OKAY 3 513 514 static volatile int command_status = FD_COMMAND_NONE; 515 static unsigned long fdc_busy; 516 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); 517 static DECLARE_WAIT_QUEUE_HEAD(command_done); 518 519 /* Errors during formatting are counted here. */ 520 static int format_errors; 521 522 /* Format request descriptor. */ 523 static struct format_descr format_req; 524 525 /* 526 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps 527 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), 528 * H is head unload time (1=16ms, 2=32ms, etc) 529 */ 530 531 /* 532 * Track buffer 533 * Because these are written to by the DMA controller, they must 534 * not contain a 64k byte boundary crossing, or data will be 535 * corrupted/lost. 536 */ 537 static char *floppy_track_buffer; 538 static int max_buffer_sectors; 539 540 static int *errors; 541 typedef void (*done_f)(int); 542 static const struct cont_t { 543 void (*interrupt)(void); 544 /* this is called after the interrupt of the 545 * main command */ 546 void (*redo)(void); /* this is called to retry the operation */ 547 void (*error)(void); /* this is called to tally an error */ 548 done_f done; /* this is called to say if the operation has 549 * succeeded/failed */ 550 } *cont; 551 552 static void floppy_ready(void); 553 static void floppy_start(void); 554 static void process_fd_request(void); 555 static void recalibrate_floppy(void); 556 static void floppy_shutdown(unsigned long); 557 558 static int floppy_request_regions(int); 559 static void floppy_release_regions(int); 560 static int floppy_grab_irq_and_dma(void); 561 static void floppy_release_irq_and_dma(void); 562 563 /* 564 * The "reset" variable should be tested whenever an interrupt is scheduled, 565 * after the commands have been sent. This is to ensure that the driver doesn't 566 * get wedged when the interrupt doesn't come because of a failed command. 567 * reset doesn't need to be tested before sending commands, because 568 * output_byte is automatically disabled when reset is set. 569 */ 570 static void reset_fdc(void); 571 572 /* 573 * These are global variables, as that's the easiest way to give 574 * information to interrupts. They are the data used for the current 575 * request. 576 */ 577 #define NO_TRACK -1 578 #define NEED_1_RECAL -2 579 #define NEED_2_RECAL -3 580 581 static atomic_t usage_count = ATOMIC_INIT(0); 582 583 /* buffer related variables */ 584 static int buffer_track = -1; 585 static int buffer_drive = -1; 586 static int buffer_min = -1; 587 static int buffer_max = -1; 588 589 /* fdc related variables, should end up in a struct */ 590 static struct floppy_fdc_state fdc_state[N_FDC]; 591 static int fdc; /* current fdc */ 592 593 static struct floppy_struct *_floppy = floppy_type; 594 static unsigned char current_drive; 595 static long current_count_sectors; 596 static unsigned char fsector_t; /* sector in track */ 597 static unsigned char in_sector_offset; /* offset within physical sector, 598 * expressed in units of 512 bytes */ 599 600 static inline bool drive_no_geom(int drive) 601 { 602 return !current_type[drive] && !ITYPE(UDRS->fd_device); 603 } 604 605 #ifndef fd_eject 606 static inline int fd_eject(int drive) 607 { 608 return -EINVAL; 609 } 610 #endif 611 612 /* 613 * Debugging 614 * ========= 615 */ 616 #ifdef DEBUGT 617 static long unsigned debugtimer; 618 619 static inline void set_debugt(void) 620 { 621 debugtimer = jiffies; 622 } 623 624 static inline void debugt(const char *func, const char *msg) 625 { 626 if (DP->flags & DEBUGT) 627 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); 628 } 629 #else 630 static inline void set_debugt(void) { } 631 static inline void debugt(const char *func, const char *msg) { } 632 #endif /* DEBUGT */ 633 634 typedef void (*timeout_fn)(unsigned long); 635 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); 636 637 static const char *timeout_message; 638 639 static void is_alive(const char *func, const char *message) 640 { 641 /* this routine checks whether the floppy driver is "alive" */ 642 if (test_bit(0, &fdc_busy) && command_status < 2 && 643 !timer_pending(&fd_timeout)) { 644 DPRINT("%s: timeout handler died. %s\n", func, message); 645 } 646 } 647 648 static void (*do_floppy)(void) = NULL; 649 650 #define OLOGSIZE 20 651 652 static void (*lasthandler)(void); 653 static unsigned long interruptjiffies; 654 static unsigned long resultjiffies; 655 static int resultsize; 656 static unsigned long lastredo; 657 658 static struct output_log { 659 unsigned char data; 660 unsigned char status; 661 unsigned long jiffies; 662 } output_log[OLOGSIZE]; 663 664 static int output_log_pos; 665 666 #define current_reqD -1 667 #define MAXTIMEOUT -2 668 669 static void __reschedule_timeout(int drive, const char *message) 670 { 671 if (drive == current_reqD) 672 drive = current_drive; 673 del_timer(&fd_timeout); 674 if (drive < 0 || drive >= N_DRIVE) { 675 fd_timeout.expires = jiffies + 20UL * HZ; 676 drive = 0; 677 } else 678 fd_timeout.expires = jiffies + UDP->timeout; 679 add_timer(&fd_timeout); 680 if (UDP->flags & FD_DEBUG) 681 DPRINT("reschedule timeout %s\n", message); 682 timeout_message = message; 683 } 684 685 static void reschedule_timeout(int drive, const char *message) 686 { 687 unsigned long flags; 688 689 spin_lock_irqsave(&floppy_lock, flags); 690 __reschedule_timeout(drive, message); 691 spin_unlock_irqrestore(&floppy_lock, flags); 692 } 693 694 #define INFBOUND(a, b) (a) = max_t(int, a, b) 695 #define SUPBOUND(a, b) (a) = min_t(int, a, b) 696 697 /* 698 * Bottom half floppy driver. 699 * ========================== 700 * 701 * This part of the file contains the code talking directly to the hardware, 702 * and also the main service loop (seek-configure-spinup-command) 703 */ 704 705 /* 706 * disk change. 707 * This routine is responsible for maintaining the FD_DISK_CHANGE flag, 708 * and the last_checked date. 709 * 710 * last_checked is the date of the last check which showed 'no disk change' 711 * FD_DISK_CHANGE is set under two conditions: 712 * 1. The floppy has been changed after some i/o to that floppy already 713 * took place. 714 * 2. No floppy disk is in the drive. This is done in order to ensure that 715 * requests are quickly flushed in case there is no disk in the drive. It 716 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in 717 * the drive. 718 * 719 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. 720 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on 721 * each seek. If a disk is present, the disk change line should also be 722 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk 723 * change line is set, this means either that no disk is in the drive, or 724 * that it has been removed since the last seek. 725 * 726 * This means that we really have a third possibility too: 727 * The floppy has been changed after the last seek. 728 */ 729 730 static int disk_change(int drive) 731 { 732 int fdc = FDC(drive); 733 734 if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) 735 DPRINT("WARNING disk change called early\n"); 736 if (!(FDCS->dor & (0x10 << UNIT(drive))) || 737 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { 738 DPRINT("probing disk change on unselected drive\n"); 739 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), 740 (unsigned int)FDCS->dor); 741 } 742 743 debug_dcl(UDP->flags, 744 "checking disk change line for drive %d\n", drive); 745 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); 746 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); 747 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); 748 749 if (UDP->flags & FD_BROKEN_DCL) 750 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 751 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { 752 set_bit(FD_VERIFY_BIT, &UDRS->flags); 753 /* verify write protection */ 754 755 if (UDRS->maxblock) /* mark it changed */ 756 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 757 758 /* invalidate its geometry */ 759 if (UDRS->keep_data >= 0) { 760 if ((UDP->flags & FTD_MSG) && 761 current_type[drive] != NULL) 762 DPRINT("Disk type is undefined after disk change\n"); 763 current_type[drive] = NULL; 764 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; 765 } 766 767 return 1; 768 } else { 769 UDRS->last_checked = jiffies; 770 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 771 } 772 return 0; 773 } 774 775 static inline int is_selected(int dor, int unit) 776 { 777 return ((dor & (0x10 << unit)) && (dor & 3) == unit); 778 } 779 780 static bool is_ready_state(int status) 781 { 782 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); 783 return state == STATUS_READY; 784 } 785 786 static int set_dor(int fdc, char mask, char data) 787 { 788 unsigned char unit; 789 unsigned char drive; 790 unsigned char newdor; 791 unsigned char olddor; 792 793 if (FDCS->address == -1) 794 return -1; 795 796 olddor = FDCS->dor; 797 newdor = (olddor & mask) | data; 798 if (newdor != olddor) { 799 unit = olddor & 0x3; 800 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { 801 drive = REVDRIVE(fdc, unit); 802 debug_dcl(UDP->flags, 803 "calling disk change from set_dor\n"); 804 disk_change(drive); 805 } 806 FDCS->dor = newdor; 807 fd_outb(newdor, FD_DOR); 808 809 unit = newdor & 0x3; 810 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { 811 drive = REVDRIVE(fdc, unit); 812 UDRS->select_date = jiffies; 813 } 814 } 815 return olddor; 816 } 817 818 static void twaddle(void) 819 { 820 if (DP->select_delay) 821 return; 822 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); 823 fd_outb(FDCS->dor, FD_DOR); 824 DRS->select_date = jiffies; 825 } 826 827 /* 828 * Reset all driver information about the current fdc. 829 * This is needed after a reset, and after a raw command. 830 */ 831 static void reset_fdc_info(int mode) 832 { 833 int drive; 834 835 FDCS->spec1 = FDCS->spec2 = -1; 836 FDCS->need_configure = 1; 837 FDCS->perp_mode = 1; 838 FDCS->rawcmd = 0; 839 for (drive = 0; drive < N_DRIVE; drive++) 840 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) 841 UDRS->track = NEED_2_RECAL; 842 } 843 844 /* selects the fdc and drive, and enables the fdc's input/dma. */ 845 static void set_fdc(int drive) 846 { 847 if (drive >= 0 && drive < N_DRIVE) { 848 fdc = FDC(drive); 849 current_drive = drive; 850 } 851 if (fdc != 1 && fdc != 0) { 852 pr_info("bad fdc value\n"); 853 return; 854 } 855 set_dor(fdc, ~0, 8); 856 #if N_FDC > 1 857 set_dor(1 - fdc, ~8, 0); 858 #endif 859 if (FDCS->rawcmd == 2) 860 reset_fdc_info(1); 861 if (fd_inb(FD_STATUS) != STATUS_READY) 862 FDCS->reset = 1; 863 } 864 865 /* locks the driver */ 866 static int lock_fdc(int drive, bool interruptible) 867 { 868 if (WARN(atomic_read(&usage_count) == 0, 869 "Trying to lock fdc while usage count=0\n")) 870 return -1; 871 872 if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) 873 return -EINTR; 874 875 command_status = FD_COMMAND_NONE; 876 877 __reschedule_timeout(drive, "lock fdc"); 878 set_fdc(drive); 879 return 0; 880 } 881 882 /* unlocks the driver */ 883 static void unlock_fdc(void) 884 { 885 unsigned long flags; 886 887 raw_cmd = NULL; 888 if (!test_bit(0, &fdc_busy)) 889 DPRINT("FDC access conflict!\n"); 890 891 if (do_floppy) 892 DPRINT("device interrupt still active at FDC release: %pf!\n", 893 do_floppy); 894 command_status = FD_COMMAND_NONE; 895 spin_lock_irqsave(&floppy_lock, flags); 896 del_timer(&fd_timeout); 897 cont = NULL; 898 clear_bit(0, &fdc_busy); 899 if (current_req || set_next_request()) 900 do_fd_request(current_req->q); 901 spin_unlock_irqrestore(&floppy_lock, flags); 902 wake_up(&fdc_wait); 903 } 904 905 /* switches the motor off after a given timeout */ 906 static void motor_off_callback(unsigned long nr) 907 { 908 unsigned char mask = ~(0x10 << UNIT(nr)); 909 910 set_dor(FDC(nr), mask, 0); 911 } 912 913 /* schedules motor off */ 914 static void floppy_off(unsigned int drive) 915 { 916 unsigned long volatile delta; 917 int fdc = FDC(drive); 918 919 if (!(FDCS->dor & (0x10 << UNIT(drive)))) 920 return; 921 922 del_timer(motor_off_timer + drive); 923 924 /* make spindle stop in a position which minimizes spinup time 925 * next time */ 926 if (UDP->rps) { 927 delta = jiffies - UDRS->first_read_date + HZ - 928 UDP->spindown_offset; 929 delta = ((delta * UDP->rps) % HZ) / UDP->rps; 930 motor_off_timer[drive].expires = 931 jiffies + UDP->spindown - delta; 932 } 933 add_timer(motor_off_timer + drive); 934 } 935 936 /* 937 * cycle through all N_DRIVE floppy drives, for disk change testing. 938 * stopping at current drive. This is done before any long operation, to 939 * be sure to have up to date disk change information. 940 */ 941 static void scandrives(void) 942 { 943 int i; 944 int drive; 945 int saved_drive; 946 947 if (DP->select_delay) 948 return; 949 950 saved_drive = current_drive; 951 for (i = 0; i < N_DRIVE; i++) { 952 drive = (saved_drive + i + 1) % N_DRIVE; 953 if (UDRS->fd_ref == 0 || UDP->select_delay != 0) 954 continue; /* skip closed drives */ 955 set_fdc(drive); 956 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & 957 (0x10 << UNIT(drive)))) 958 /* switch the motor off again, if it was off to 959 * begin with */ 960 set_dor(fdc, ~(0x10 << UNIT(drive)), 0); 961 } 962 set_fdc(saved_drive); 963 } 964 965 static void empty(void) 966 { 967 } 968 969 static DECLARE_WORK(floppy_work, NULL); 970 971 static void schedule_bh(void (*handler)(void)) 972 { 973 PREPARE_WORK(&floppy_work, (work_func_t)handler); 974 schedule_work(&floppy_work); 975 } 976 977 static DEFINE_TIMER(fd_timer, NULL, 0, 0); 978 979 static void cancel_activity(void) 980 { 981 unsigned long flags; 982 983 spin_lock_irqsave(&floppy_lock, flags); 984 do_floppy = NULL; 985 PREPARE_WORK(&floppy_work, (work_func_t)empty); 986 del_timer(&fd_timer); 987 spin_unlock_irqrestore(&floppy_lock, flags); 988 } 989 990 /* this function makes sure that the disk stays in the drive during the 991 * transfer */ 992 static void fd_watchdog(void) 993 { 994 debug_dcl(DP->flags, "calling disk change from watchdog\n"); 995 996 if (disk_change(current_drive)) { 997 DPRINT("disk removed during i/o\n"); 998 cancel_activity(); 999 cont->done(0); 1000 reset_fdc(); 1001 } else { 1002 del_timer(&fd_timer); 1003 fd_timer.function = (timeout_fn)fd_watchdog; 1004 fd_timer.expires = jiffies + HZ / 10; 1005 add_timer(&fd_timer); 1006 } 1007 } 1008 1009 static void main_command_interrupt(void) 1010 { 1011 del_timer(&fd_timer); 1012 cont->interrupt(); 1013 } 1014 1015 /* waits for a delay (spinup or select) to pass */ 1016 static int fd_wait_for_completion(unsigned long delay, timeout_fn function) 1017 { 1018 if (FDCS->reset) { 1019 reset_fdc(); /* do the reset during sleep to win time 1020 * if we don't need to sleep, it's a good 1021 * occasion anyways */ 1022 return 1; 1023 } 1024 1025 if (time_before(jiffies, delay)) { 1026 del_timer(&fd_timer); 1027 fd_timer.function = function; 1028 fd_timer.expires = delay; 1029 add_timer(&fd_timer); 1030 return 1; 1031 } 1032 return 0; 1033 } 1034 1035 static DEFINE_SPINLOCK(floppy_hlt_lock); 1036 static int hlt_disabled; 1037 static void floppy_disable_hlt(void) 1038 { 1039 unsigned long flags; 1040 1041 spin_lock_irqsave(&floppy_hlt_lock, flags); 1042 if (!hlt_disabled) { 1043 hlt_disabled = 1; 1044 #ifdef HAVE_DISABLE_HLT 1045 disable_hlt(); 1046 #endif 1047 } 1048 spin_unlock_irqrestore(&floppy_hlt_lock, flags); 1049 } 1050 1051 static void floppy_enable_hlt(void) 1052 { 1053 unsigned long flags; 1054 1055 spin_lock_irqsave(&floppy_hlt_lock, flags); 1056 if (hlt_disabled) { 1057 hlt_disabled = 0; 1058 #ifdef HAVE_DISABLE_HLT 1059 enable_hlt(); 1060 #endif 1061 } 1062 spin_unlock_irqrestore(&floppy_hlt_lock, flags); 1063 } 1064 1065 static void setup_DMA(void) 1066 { 1067 unsigned long f; 1068 1069 if (raw_cmd->length == 0) { 1070 int i; 1071 1072 pr_info("zero dma transfer size:"); 1073 for (i = 0; i < raw_cmd->cmd_count; i++) 1074 pr_cont("%x,", raw_cmd->cmd[i]); 1075 pr_cont("\n"); 1076 cont->done(0); 1077 FDCS->reset = 1; 1078 return; 1079 } 1080 if (((unsigned long)raw_cmd->kernel_data) % 512) { 1081 pr_info("non aligned address: %p\n", raw_cmd->kernel_data); 1082 cont->done(0); 1083 FDCS->reset = 1; 1084 return; 1085 } 1086 f = claim_dma_lock(); 1087 fd_disable_dma(); 1088 #ifdef fd_dma_setup 1089 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, 1090 (raw_cmd->flags & FD_RAW_READ) ? 1091 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { 1092 release_dma_lock(f); 1093 cont->done(0); 1094 FDCS->reset = 1; 1095 return; 1096 } 1097 release_dma_lock(f); 1098 #else 1099 fd_clear_dma_ff(); 1100 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); 1101 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? 1102 DMA_MODE_READ : DMA_MODE_WRITE); 1103 fd_set_dma_addr(raw_cmd->kernel_data); 1104 fd_set_dma_count(raw_cmd->length); 1105 virtual_dma_port = FDCS->address; 1106 fd_enable_dma(); 1107 release_dma_lock(f); 1108 #endif 1109 floppy_disable_hlt(); 1110 } 1111 1112 static void show_floppy(void); 1113 1114 /* waits until the fdc becomes ready */ 1115 static int wait_til_ready(void) 1116 { 1117 int status; 1118 int counter; 1119 1120 if (FDCS->reset) 1121 return -1; 1122 for (counter = 0; counter < 10000; counter++) { 1123 status = fd_inb(FD_STATUS); 1124 if (status & STATUS_READY) 1125 return status; 1126 } 1127 if (initialized) { 1128 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); 1129 show_floppy(); 1130 } 1131 FDCS->reset = 1; 1132 return -1; 1133 } 1134 1135 /* sends a command byte to the fdc */ 1136 static int output_byte(char byte) 1137 { 1138 int status = wait_til_ready(); 1139 1140 if (status < 0) 1141 return -1; 1142 1143 if (is_ready_state(status)) { 1144 fd_outb(byte, FD_DATA); 1145 output_log[output_log_pos].data = byte; 1146 output_log[output_log_pos].status = status; 1147 output_log[output_log_pos].jiffies = jiffies; 1148 output_log_pos = (output_log_pos + 1) % OLOGSIZE; 1149 return 0; 1150 } 1151 FDCS->reset = 1; 1152 if (initialized) { 1153 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", 1154 byte, fdc, status); 1155 show_floppy(); 1156 } 1157 return -1; 1158 } 1159 1160 /* gets the response from the fdc */ 1161 static int result(void) 1162 { 1163 int i; 1164 int status = 0; 1165 1166 for (i = 0; i < MAX_REPLIES; i++) { 1167 status = wait_til_ready(); 1168 if (status < 0) 1169 break; 1170 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; 1171 if ((status & ~STATUS_BUSY) == STATUS_READY) { 1172 resultjiffies = jiffies; 1173 resultsize = i; 1174 return i; 1175 } 1176 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) 1177 reply_buffer[i] = fd_inb(FD_DATA); 1178 else 1179 break; 1180 } 1181 if (initialized) { 1182 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", 1183 fdc, status, i); 1184 show_floppy(); 1185 } 1186 FDCS->reset = 1; 1187 return -1; 1188 } 1189 1190 #define MORE_OUTPUT -2 1191 /* does the fdc need more output? */ 1192 static int need_more_output(void) 1193 { 1194 int status = wait_til_ready(); 1195 1196 if (status < 0) 1197 return -1; 1198 1199 if (is_ready_state(status)) 1200 return MORE_OUTPUT; 1201 1202 return result(); 1203 } 1204 1205 /* Set perpendicular mode as required, based on data rate, if supported. 1206 * 82077 Now tested. 1Mbps data rate only possible with 82077-1. 1207 */ 1208 static void perpendicular_mode(void) 1209 { 1210 unsigned char perp_mode; 1211 1212 if (raw_cmd->rate & 0x40) { 1213 switch (raw_cmd->rate & 3) { 1214 case 0: 1215 perp_mode = 2; 1216 break; 1217 case 3: 1218 perp_mode = 3; 1219 break; 1220 default: 1221 DPRINT("Invalid data rate for perpendicular mode!\n"); 1222 cont->done(0); 1223 FDCS->reset = 1; 1224 /* 1225 * convenient way to return to 1226 * redo without too much hassle 1227 * (deep stack et al.) 1228 */ 1229 return; 1230 } 1231 } else 1232 perp_mode = 0; 1233 1234 if (FDCS->perp_mode == perp_mode) 1235 return; 1236 if (FDCS->version >= FDC_82077_ORIG) { 1237 output_byte(FD_PERPENDICULAR); 1238 output_byte(perp_mode); 1239 FDCS->perp_mode = perp_mode; 1240 } else if (perp_mode) { 1241 DPRINT("perpendicular mode not supported by this FDC.\n"); 1242 } 1243 } /* perpendicular_mode */ 1244 1245 static int fifo_depth = 0xa; 1246 static int no_fifo; 1247 1248 static int fdc_configure(void) 1249 { 1250 /* Turn on FIFO */ 1251 output_byte(FD_CONFIGURE); 1252 if (need_more_output() != MORE_OUTPUT) 1253 return 0; 1254 output_byte(0); 1255 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); 1256 output_byte(0); /* pre-compensation from track 1257 0 upwards */ 1258 return 1; 1259 } 1260 1261 #define NOMINAL_DTR 500 1262 1263 /* Issue a "SPECIFY" command to set the step rate time, head unload time, 1264 * head load time, and DMA disable flag to values needed by floppy. 1265 * 1266 * The value "dtr" is the data transfer rate in Kbps. It is needed 1267 * to account for the data rate-based scaling done by the 82072 and 82077 1268 * FDC types. This parameter is ignored for other types of FDCs (i.e. 1269 * 8272a). 1270 * 1271 * Note that changing the data transfer rate has a (probably deleterious) 1272 * effect on the parameters subject to scaling for 82072/82077 FDCs, so 1273 * fdc_specify is called again after each data transfer rate 1274 * change. 1275 * 1276 * srt: 1000 to 16000 in microseconds 1277 * hut: 16 to 240 milliseconds 1278 * hlt: 2 to 254 milliseconds 1279 * 1280 * These values are rounded up to the next highest available delay time. 1281 */ 1282 static void fdc_specify(void) 1283 { 1284 unsigned char spec1; 1285 unsigned char spec2; 1286 unsigned long srt; 1287 unsigned long hlt; 1288 unsigned long hut; 1289 unsigned long dtr = NOMINAL_DTR; 1290 unsigned long scale_dtr = NOMINAL_DTR; 1291 int hlt_max_code = 0x7f; 1292 int hut_max_code = 0xf; 1293 1294 if (FDCS->need_configure && FDCS->version >= FDC_82072A) { 1295 fdc_configure(); 1296 FDCS->need_configure = 0; 1297 } 1298 1299 switch (raw_cmd->rate & 0x03) { 1300 case 3: 1301 dtr = 1000; 1302 break; 1303 case 1: 1304 dtr = 300; 1305 if (FDCS->version >= FDC_82078) { 1306 /* chose the default rate table, not the one 1307 * where 1 = 2 Mbps */ 1308 output_byte(FD_DRIVESPEC); 1309 if (need_more_output() == MORE_OUTPUT) { 1310 output_byte(UNIT(current_drive)); 1311 output_byte(0xc0); 1312 } 1313 } 1314 break; 1315 case 2: 1316 dtr = 250; 1317 break; 1318 } 1319 1320 if (FDCS->version >= FDC_82072) { 1321 scale_dtr = dtr; 1322 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ 1323 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ 1324 } 1325 1326 /* Convert step rate from microseconds to milliseconds and 4 bits */ 1327 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); 1328 if (slow_floppy) 1329 srt = srt / 4; 1330 1331 SUPBOUND(srt, 0xf); 1332 INFBOUND(srt, 0); 1333 1334 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); 1335 if (hlt < 0x01) 1336 hlt = 0x01; 1337 else if (hlt > 0x7f) 1338 hlt = hlt_max_code; 1339 1340 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); 1341 if (hut < 0x1) 1342 hut = 0x1; 1343 else if (hut > 0xf) 1344 hut = hut_max_code; 1345 1346 spec1 = (srt << 4) | hut; 1347 spec2 = (hlt << 1) | (use_virtual_dma & 1); 1348 1349 /* If these parameters did not change, just return with success */ 1350 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { 1351 /* Go ahead and set spec1 and spec2 */ 1352 output_byte(FD_SPECIFY); 1353 output_byte(FDCS->spec1 = spec1); 1354 output_byte(FDCS->spec2 = spec2); 1355 } 1356 } /* fdc_specify */ 1357 1358 /* Set the FDC's data transfer rate on behalf of the specified drive. 1359 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue 1360 * of the specify command (i.e. using the fdc_specify function). 1361 */ 1362 static int fdc_dtr(void) 1363 { 1364 /* If data rate not already set to desired value, set it. */ 1365 if ((raw_cmd->rate & 3) == FDCS->dtr) 1366 return 0; 1367 1368 /* Set dtr */ 1369 fd_outb(raw_cmd->rate & 3, FD_DCR); 1370 1371 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) 1372 * need a stabilization period of several milliseconds to be 1373 * enforced after data rate changes before R/W operations. 1374 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) 1375 */ 1376 FDCS->dtr = raw_cmd->rate & 3; 1377 return fd_wait_for_completion(jiffies + 2UL * HZ / 100, 1378 (timeout_fn)floppy_ready); 1379 } /* fdc_dtr */ 1380 1381 static void tell_sector(void) 1382 { 1383 pr_cont(": track %d, head %d, sector %d, size %d", 1384 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); 1385 } /* tell_sector */ 1386 1387 static void print_errors(void) 1388 { 1389 DPRINT(""); 1390 if (ST0 & ST0_ECE) { 1391 pr_cont("Recalibrate failed!"); 1392 } else if (ST2 & ST2_CRC) { 1393 pr_cont("data CRC error"); 1394 tell_sector(); 1395 } else if (ST1 & ST1_CRC) { 1396 pr_cont("CRC error"); 1397 tell_sector(); 1398 } else if ((ST1 & (ST1_MAM | ST1_ND)) || 1399 (ST2 & ST2_MAM)) { 1400 if (!probing) { 1401 pr_cont("sector not found"); 1402 tell_sector(); 1403 } else 1404 pr_cont("probe failed..."); 1405 } else if (ST2 & ST2_WC) { /* seek error */ 1406 pr_cont("wrong cylinder"); 1407 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ 1408 pr_cont("bad cylinder"); 1409 } else { 1410 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", 1411 ST0, ST1, ST2); 1412 tell_sector(); 1413 } 1414 pr_cont("\n"); 1415 } 1416 1417 /* 1418 * OK, this error interpreting routine is called after a 1419 * DMA read/write has succeeded 1420 * or failed, so we check the results, and copy any buffers. 1421 * hhb: Added better error reporting. 1422 * ak: Made this into a separate routine. 1423 */ 1424 static int interpret_errors(void) 1425 { 1426 char bad; 1427 1428 if (inr != 7) { 1429 DPRINT("-- FDC reply error\n"); 1430 FDCS->reset = 1; 1431 return 1; 1432 } 1433 1434 /* check IC to find cause of interrupt */ 1435 switch (ST0 & ST0_INTR) { 1436 case 0x40: /* error occurred during command execution */ 1437 if (ST1 & ST1_EOC) 1438 return 0; /* occurs with pseudo-DMA */ 1439 bad = 1; 1440 if (ST1 & ST1_WP) { 1441 DPRINT("Drive is write protected\n"); 1442 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1443 cont->done(0); 1444 bad = 2; 1445 } else if (ST1 & ST1_ND) { 1446 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1447 } else if (ST1 & ST1_OR) { 1448 if (DP->flags & FTD_MSG) 1449 DPRINT("Over/Underrun - retrying\n"); 1450 bad = 0; 1451 } else if (*errors >= DP->max_errors.reporting) { 1452 print_errors(); 1453 } 1454 if (ST2 & ST2_WC || ST2 & ST2_BC) 1455 /* wrong cylinder => recal */ 1456 DRS->track = NEED_2_RECAL; 1457 return bad; 1458 case 0x80: /* invalid command given */ 1459 DPRINT("Invalid FDC command given!\n"); 1460 cont->done(0); 1461 return 2; 1462 case 0xc0: 1463 DPRINT("Abnormal termination caused by polling\n"); 1464 cont->error(); 1465 return 2; 1466 default: /* (0) Normal command termination */ 1467 return 0; 1468 } 1469 } 1470 1471 /* 1472 * This routine is called when everything should be correctly set up 1473 * for the transfer (i.e. floppy motor is on, the correct floppy is 1474 * selected, and the head is sitting on the right track). 1475 */ 1476 static void setup_rw_floppy(void) 1477 { 1478 int i; 1479 int r; 1480 int flags; 1481 int dflags; 1482 unsigned long ready_date; 1483 timeout_fn function; 1484 1485 flags = raw_cmd->flags; 1486 if (flags & (FD_RAW_READ | FD_RAW_WRITE)) 1487 flags |= FD_RAW_INTR; 1488 1489 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { 1490 ready_date = DRS->spinup_date + DP->spinup; 1491 /* If spinup will take a long time, rerun scandrives 1492 * again just before spinup completion. Beware that 1493 * after scandrives, we must again wait for selection. 1494 */ 1495 if (time_after(ready_date, jiffies + DP->select_delay)) { 1496 ready_date -= DP->select_delay; 1497 function = (timeout_fn)floppy_start; 1498 } else 1499 function = (timeout_fn)setup_rw_floppy; 1500 1501 /* wait until the floppy is spinning fast enough */ 1502 if (fd_wait_for_completion(ready_date, function)) 1503 return; 1504 } 1505 dflags = DRS->flags; 1506 1507 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) 1508 setup_DMA(); 1509 1510 if (flags & FD_RAW_INTR) 1511 do_floppy = main_command_interrupt; 1512 1513 r = 0; 1514 for (i = 0; i < raw_cmd->cmd_count; i++) 1515 r |= output_byte(raw_cmd->cmd[i]); 1516 1517 debugt(__func__, "rw_command"); 1518 1519 if (r) { 1520 cont->error(); 1521 reset_fdc(); 1522 return; 1523 } 1524 1525 if (!(flags & FD_RAW_INTR)) { 1526 inr = result(); 1527 cont->interrupt(); 1528 } else if (flags & FD_RAW_NEED_DISK) 1529 fd_watchdog(); 1530 } 1531 1532 static int blind_seek; 1533 1534 /* 1535 * This is the routine called after every seek (or recalibrate) interrupt 1536 * from the floppy controller. 1537 */ 1538 static void seek_interrupt(void) 1539 { 1540 debugt(__func__, ""); 1541 if (inr != 2 || (ST0 & 0xF8) != 0x20) { 1542 DPRINT("seek failed\n"); 1543 DRS->track = NEED_2_RECAL; 1544 cont->error(); 1545 cont->redo(); 1546 return; 1547 } 1548 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { 1549 debug_dcl(DP->flags, 1550 "clearing NEWCHANGE flag because of effective seek\n"); 1551 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); 1552 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1553 /* effective seek */ 1554 DRS->select_date = jiffies; 1555 } 1556 DRS->track = ST1; 1557 floppy_ready(); 1558 } 1559 1560 static void check_wp(void) 1561 { 1562 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { 1563 /* check write protection */ 1564 output_byte(FD_GETSTATUS); 1565 output_byte(UNIT(current_drive)); 1566 if (result() != 1) { 1567 FDCS->reset = 1; 1568 return; 1569 } 1570 clear_bit(FD_VERIFY_BIT, &DRS->flags); 1571 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1572 debug_dcl(DP->flags, 1573 "checking whether disk is write protected\n"); 1574 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); 1575 if (!(ST3 & 0x40)) 1576 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1577 else 1578 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1579 } 1580 } 1581 1582 static void seek_floppy(void) 1583 { 1584 int track; 1585 1586 blind_seek = 0; 1587 1588 debug_dcl(DP->flags, "calling disk change from %s\n", __func__); 1589 1590 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1591 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { 1592 /* the media changed flag should be cleared after the seek. 1593 * If it isn't, this means that there is really no disk in 1594 * the drive. 1595 */ 1596 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); 1597 cont->done(0); 1598 cont->redo(); 1599 return; 1600 } 1601 if (DRS->track <= NEED_1_RECAL) { 1602 recalibrate_floppy(); 1603 return; 1604 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1605 (raw_cmd->flags & FD_RAW_NEED_DISK) && 1606 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { 1607 /* we seek to clear the media-changed condition. Does anybody 1608 * know a more elegant way, which works on all drives? */ 1609 if (raw_cmd->track) 1610 track = raw_cmd->track - 1; 1611 else { 1612 if (DP->flags & FD_SILENT_DCL_CLEAR) { 1613 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); 1614 blind_seek = 1; 1615 raw_cmd->flags |= FD_RAW_NEED_SEEK; 1616 } 1617 track = 1; 1618 } 1619 } else { 1620 check_wp(); 1621 if (raw_cmd->track != DRS->track && 1622 (raw_cmd->flags & FD_RAW_NEED_SEEK)) 1623 track = raw_cmd->track; 1624 else { 1625 setup_rw_floppy(); 1626 return; 1627 } 1628 } 1629 1630 do_floppy = seek_interrupt; 1631 output_byte(FD_SEEK); 1632 output_byte(UNIT(current_drive)); 1633 if (output_byte(track) < 0) { 1634 reset_fdc(); 1635 return; 1636 } 1637 debugt(__func__, ""); 1638 } 1639 1640 static void recal_interrupt(void) 1641 { 1642 debugt(__func__, ""); 1643 if (inr != 2) 1644 FDCS->reset = 1; 1645 else if (ST0 & ST0_ECE) { 1646 switch (DRS->track) { 1647 case NEED_1_RECAL: 1648 debugt(__func__, "need 1 recal"); 1649 /* after a second recalibrate, we still haven't 1650 * reached track 0. Probably no drive. Raise an 1651 * error, as failing immediately might upset 1652 * computers possessed by the Devil :-) */ 1653 cont->error(); 1654 cont->redo(); 1655 return; 1656 case NEED_2_RECAL: 1657 debugt(__func__, "need 2 recal"); 1658 /* If we already did a recalibrate, 1659 * and we are not at track 0, this 1660 * means we have moved. (The only way 1661 * not to move at recalibration is to 1662 * be already at track 0.) Clear the 1663 * new change flag */ 1664 debug_dcl(DP->flags, 1665 "clearing NEWCHANGE flag because of second recalibrate\n"); 1666 1667 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1668 DRS->select_date = jiffies; 1669 /* fall through */ 1670 default: 1671 debugt(__func__, "default"); 1672 /* Recalibrate moves the head by at 1673 * most 80 steps. If after one 1674 * recalibrate we don't have reached 1675 * track 0, this might mean that we 1676 * started beyond track 80. Try 1677 * again. */ 1678 DRS->track = NEED_1_RECAL; 1679 break; 1680 } 1681 } else 1682 DRS->track = ST1; 1683 floppy_ready(); 1684 } 1685 1686 static void print_result(char *message, int inr) 1687 { 1688 int i; 1689 1690 DPRINT("%s ", message); 1691 if (inr >= 0) 1692 for (i = 0; i < inr; i++) 1693 pr_cont("repl[%d]=%x ", i, reply_buffer[i]); 1694 pr_cont("\n"); 1695 } 1696 1697 /* interrupt handler. Note that this can be called externally on the Sparc */ 1698 irqreturn_t floppy_interrupt(int irq, void *dev_id) 1699 { 1700 int do_print; 1701 unsigned long f; 1702 void (*handler)(void) = do_floppy; 1703 1704 lasthandler = handler; 1705 interruptjiffies = jiffies; 1706 1707 f = claim_dma_lock(); 1708 fd_disable_dma(); 1709 release_dma_lock(f); 1710 1711 floppy_enable_hlt(); 1712 do_floppy = NULL; 1713 if (fdc >= N_FDC || FDCS->address == -1) { 1714 /* we don't even know which FDC is the culprit */ 1715 pr_info("DOR0=%x\n", fdc_state[0].dor); 1716 pr_info("floppy interrupt on bizarre fdc %d\n", fdc); 1717 pr_info("handler=%pf\n", handler); 1718 is_alive(__func__, "bizarre fdc"); 1719 return IRQ_NONE; 1720 } 1721 1722 FDCS->reset = 0; 1723 /* We have to clear the reset flag here, because apparently on boxes 1724 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to 1725 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the 1726 * emission of the SENSEI's. 1727 * It is OK to emit floppy commands because we are in an interrupt 1728 * handler here, and thus we have to fear no interference of other 1729 * activity. 1730 */ 1731 1732 do_print = !handler && print_unex && initialized; 1733 1734 inr = result(); 1735 if (do_print) 1736 print_result("unexpected interrupt", inr); 1737 if (inr == 0) { 1738 int max_sensei = 4; 1739 do { 1740 output_byte(FD_SENSEI); 1741 inr = result(); 1742 if (do_print) 1743 print_result("sensei", inr); 1744 max_sensei--; 1745 } while ((ST0 & 0x83) != UNIT(current_drive) && 1746 inr == 2 && max_sensei); 1747 } 1748 if (!handler) { 1749 FDCS->reset = 1; 1750 return IRQ_NONE; 1751 } 1752 schedule_bh(handler); 1753 is_alive(__func__, "normal interrupt end"); 1754 1755 /* FIXME! Was it really for us? */ 1756 return IRQ_HANDLED; 1757 } 1758 1759 static void recalibrate_floppy(void) 1760 { 1761 debugt(__func__, ""); 1762 do_floppy = recal_interrupt; 1763 output_byte(FD_RECALIBRATE); 1764 if (output_byte(UNIT(current_drive)) < 0) 1765 reset_fdc(); 1766 } 1767 1768 /* 1769 * Must do 4 FD_SENSEIs after reset because of ``drive polling''. 1770 */ 1771 static void reset_interrupt(void) 1772 { 1773 debugt(__func__, ""); 1774 result(); /* get the status ready for set_fdc */ 1775 if (FDCS->reset) { 1776 pr_info("reset set in interrupt, calling %pf\n", cont->error); 1777 cont->error(); /* a reset just after a reset. BAD! */ 1778 } 1779 cont->redo(); 1780 } 1781 1782 /* 1783 * reset is done by pulling bit 2 of DOR low for a while (old FDCs), 1784 * or by setting the self clearing bit 7 of STATUS (newer FDCs) 1785 */ 1786 static void reset_fdc(void) 1787 { 1788 unsigned long flags; 1789 1790 do_floppy = reset_interrupt; 1791 FDCS->reset = 0; 1792 reset_fdc_info(0); 1793 1794 /* Pseudo-DMA may intercept 'reset finished' interrupt. */ 1795 /* Irrelevant for systems with true DMA (i386). */ 1796 1797 flags = claim_dma_lock(); 1798 fd_disable_dma(); 1799 release_dma_lock(flags); 1800 1801 if (FDCS->version >= FDC_82072A) 1802 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); 1803 else { 1804 fd_outb(FDCS->dor & ~0x04, FD_DOR); 1805 udelay(FD_RESET_DELAY); 1806 fd_outb(FDCS->dor, FD_DOR); 1807 } 1808 } 1809 1810 static void show_floppy(void) 1811 { 1812 int i; 1813 1814 pr_info("\n"); 1815 pr_info("floppy driver state\n"); 1816 pr_info("-------------------\n"); 1817 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", 1818 jiffies, interruptjiffies, jiffies - interruptjiffies, 1819 lasthandler); 1820 1821 pr_info("timeout_message=%s\n", timeout_message); 1822 pr_info("last output bytes:\n"); 1823 for (i = 0; i < OLOGSIZE; i++) 1824 pr_info("%2x %2x %lu\n", 1825 output_log[(i + output_log_pos) % OLOGSIZE].data, 1826 output_log[(i + output_log_pos) % OLOGSIZE].status, 1827 output_log[(i + output_log_pos) % OLOGSIZE].jiffies); 1828 pr_info("last result at %lu\n", resultjiffies); 1829 pr_info("last redo_fd_request at %lu\n", lastredo); 1830 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, 1831 reply_buffer, resultsize, true); 1832 1833 pr_info("status=%x\n", fd_inb(FD_STATUS)); 1834 pr_info("fdc_busy=%lu\n", fdc_busy); 1835 if (do_floppy) 1836 pr_info("do_floppy=%pf\n", do_floppy); 1837 if (work_pending(&floppy_work)) 1838 pr_info("floppy_work.func=%pf\n", floppy_work.func); 1839 if (timer_pending(&fd_timer)) 1840 pr_info("fd_timer.function=%pf\n", fd_timer.function); 1841 if (timer_pending(&fd_timeout)) { 1842 pr_info("timer_function=%pf\n", fd_timeout.function); 1843 pr_info("expires=%lu\n", fd_timeout.expires - jiffies); 1844 pr_info("now=%lu\n", jiffies); 1845 } 1846 pr_info("cont=%p\n", cont); 1847 pr_info("current_req=%p\n", current_req); 1848 pr_info("command_status=%d\n", command_status); 1849 pr_info("\n"); 1850 } 1851 1852 static void floppy_shutdown(unsigned long data) 1853 { 1854 unsigned long flags; 1855 1856 if (initialized) 1857 show_floppy(); 1858 cancel_activity(); 1859 1860 floppy_enable_hlt(); 1861 1862 flags = claim_dma_lock(); 1863 fd_disable_dma(); 1864 release_dma_lock(flags); 1865 1866 /* avoid dma going to a random drive after shutdown */ 1867 1868 if (initialized) 1869 DPRINT("floppy timeout called\n"); 1870 FDCS->reset = 1; 1871 if (cont) { 1872 cont->done(0); 1873 cont->redo(); /* this will recall reset when needed */ 1874 } else { 1875 pr_info("no cont in shutdown!\n"); 1876 process_fd_request(); 1877 } 1878 is_alive(__func__, ""); 1879 } 1880 1881 /* start motor, check media-changed condition and write protection */ 1882 static int start_motor(void (*function)(void)) 1883 { 1884 int mask; 1885 int data; 1886 1887 mask = 0xfc; 1888 data = UNIT(current_drive); 1889 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { 1890 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { 1891 set_debugt(); 1892 /* no read since this drive is running */ 1893 DRS->first_read_date = 0; 1894 /* note motor start time if motor is not yet running */ 1895 DRS->spinup_date = jiffies; 1896 data |= (0x10 << UNIT(current_drive)); 1897 } 1898 } else if (FDCS->dor & (0x10 << UNIT(current_drive))) 1899 mask &= ~(0x10 << UNIT(current_drive)); 1900 1901 /* starts motor and selects floppy */ 1902 del_timer(motor_off_timer + current_drive); 1903 set_dor(fdc, mask, data); 1904 1905 /* wait_for_completion also schedules reset if needed. */ 1906 return fd_wait_for_completion(DRS->select_date + DP->select_delay, 1907 (timeout_fn)function); 1908 } 1909 1910 static void floppy_ready(void) 1911 { 1912 if (FDCS->reset) { 1913 reset_fdc(); 1914 return; 1915 } 1916 if (start_motor(floppy_ready)) 1917 return; 1918 if (fdc_dtr()) 1919 return; 1920 1921 debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); 1922 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && 1923 disk_change(current_drive) && !DP->select_delay) 1924 twaddle(); /* this clears the dcl on certain 1925 * drive/controller combinations */ 1926 1927 #ifdef fd_chose_dma_mode 1928 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { 1929 unsigned long flags = claim_dma_lock(); 1930 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); 1931 release_dma_lock(flags); 1932 } 1933 #endif 1934 1935 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { 1936 perpendicular_mode(); 1937 fdc_specify(); /* must be done here because of hut, hlt ... */ 1938 seek_floppy(); 1939 } else { 1940 if ((raw_cmd->flags & FD_RAW_READ) || 1941 (raw_cmd->flags & FD_RAW_WRITE)) 1942 fdc_specify(); 1943 setup_rw_floppy(); 1944 } 1945 } 1946 1947 static void floppy_start(void) 1948 { 1949 reschedule_timeout(current_reqD, "floppy start"); 1950 1951 scandrives(); 1952 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); 1953 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1954 floppy_ready(); 1955 } 1956 1957 /* 1958 * ======================================================================== 1959 * here ends the bottom half. Exported routines are: 1960 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, 1961 * start_motor, reset_fdc, reset_fdc_info, interpret_errors. 1962 * Initialization also uses output_byte, result, set_dor, floppy_interrupt 1963 * and set_dor. 1964 * ======================================================================== 1965 */ 1966 /* 1967 * General purpose continuations. 1968 * ============================== 1969 */ 1970 1971 static void do_wakeup(void) 1972 { 1973 reschedule_timeout(MAXTIMEOUT, "do wakeup"); 1974 cont = NULL; 1975 command_status += 2; 1976 wake_up(&command_done); 1977 } 1978 1979 static const struct cont_t wakeup_cont = { 1980 .interrupt = empty, 1981 .redo = do_wakeup, 1982 .error = empty, 1983 .done = (done_f)empty 1984 }; 1985 1986 static const struct cont_t intr_cont = { 1987 .interrupt = empty, 1988 .redo = process_fd_request, 1989 .error = empty, 1990 .done = (done_f)empty 1991 }; 1992 1993 static int wait_til_done(void (*handler)(void), bool interruptible) 1994 { 1995 int ret; 1996 1997 schedule_bh(handler); 1998 1999 if (interruptible) 2000 wait_event_interruptible(command_done, command_status >= 2); 2001 else 2002 wait_event(command_done, command_status >= 2); 2003 2004 if (command_status < 2) { 2005 cancel_activity(); 2006 cont = &intr_cont; 2007 reset_fdc(); 2008 return -EINTR; 2009 } 2010 2011 if (FDCS->reset) 2012 command_status = FD_COMMAND_ERROR; 2013 if (command_status == FD_COMMAND_OKAY) 2014 ret = 0; 2015 else 2016 ret = -EIO; 2017 command_status = FD_COMMAND_NONE; 2018 return ret; 2019 } 2020 2021 static void generic_done(int result) 2022 { 2023 command_status = result; 2024 cont = &wakeup_cont; 2025 } 2026 2027 static void generic_success(void) 2028 { 2029 cont->done(1); 2030 } 2031 2032 static void generic_failure(void) 2033 { 2034 cont->done(0); 2035 } 2036 2037 static void success_and_wakeup(void) 2038 { 2039 generic_success(); 2040 cont->redo(); 2041 } 2042 2043 /* 2044 * formatting and rw support. 2045 * ========================== 2046 */ 2047 2048 static int next_valid_format(void) 2049 { 2050 int probed_format; 2051 2052 probed_format = DRS->probed_format; 2053 while (1) { 2054 if (probed_format >= 8 || !DP->autodetect[probed_format]) { 2055 DRS->probed_format = 0; 2056 return 1; 2057 } 2058 if (floppy_type[DP->autodetect[probed_format]].sect) { 2059 DRS->probed_format = probed_format; 2060 return 0; 2061 } 2062 probed_format++; 2063 } 2064 } 2065 2066 static void bad_flp_intr(void) 2067 { 2068 int err_count; 2069 2070 if (probing) { 2071 DRS->probed_format++; 2072 if (!next_valid_format()) 2073 return; 2074 } 2075 err_count = ++(*errors); 2076 INFBOUND(DRWE->badness, err_count); 2077 if (err_count > DP->max_errors.abort) 2078 cont->done(0); 2079 if (err_count > DP->max_errors.reset) 2080 FDCS->reset = 1; 2081 else if (err_count > DP->max_errors.recal) 2082 DRS->track = NEED_2_RECAL; 2083 } 2084 2085 static void set_floppy(int drive) 2086 { 2087 int type = ITYPE(UDRS->fd_device); 2088 2089 if (type) 2090 _floppy = floppy_type + type; 2091 else 2092 _floppy = current_type[drive]; 2093 } 2094 2095 /* 2096 * formatting support. 2097 * =================== 2098 */ 2099 static void format_interrupt(void) 2100 { 2101 switch (interpret_errors()) { 2102 case 1: 2103 cont->error(); 2104 case 2: 2105 break; 2106 case 0: 2107 cont->done(1); 2108 } 2109 cont->redo(); 2110 } 2111 2112 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) 2113 #define CT(x) ((x) | 0xc0) 2114 2115 static void setup_format_params(int track) 2116 { 2117 int n; 2118 int il; 2119 int count; 2120 int head_shift; 2121 int track_shift; 2122 struct fparm { 2123 unsigned char track, head, sect, size; 2124 } *here = (struct fparm *)floppy_track_buffer; 2125 2126 raw_cmd = &default_raw_cmd; 2127 raw_cmd->track = track; 2128 2129 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | 2130 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); 2131 raw_cmd->rate = _floppy->rate & 0x43; 2132 raw_cmd->cmd_count = NR_F; 2133 COMMAND = FM_MODE(_floppy, FD_FORMAT); 2134 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); 2135 F_SIZECODE = FD_SIZECODE(_floppy); 2136 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; 2137 F_GAP = _floppy->fmt_gap; 2138 F_FILL = FD_FILL_BYTE; 2139 2140 raw_cmd->kernel_data = floppy_track_buffer; 2141 raw_cmd->length = 4 * F_SECT_PER_TRACK; 2142 2143 /* allow for about 30ms for data transport per track */ 2144 head_shift = (F_SECT_PER_TRACK + 5) / 6; 2145 2146 /* a ``cylinder'' is two tracks plus a little stepping time */ 2147 track_shift = 2 * head_shift + 3; 2148 2149 /* position of logical sector 1 on this track */ 2150 n = (track_shift * format_req.track + head_shift * format_req.head) 2151 % F_SECT_PER_TRACK; 2152 2153 /* determine interleave */ 2154 il = 1; 2155 if (_floppy->fmt_gap < 0x22) 2156 il++; 2157 2158 /* initialize field */ 2159 for (count = 0; count < F_SECT_PER_TRACK; ++count) { 2160 here[count].track = format_req.track; 2161 here[count].head = format_req.head; 2162 here[count].sect = 0; 2163 here[count].size = F_SIZECODE; 2164 } 2165 /* place logical sectors */ 2166 for (count = 1; count <= F_SECT_PER_TRACK; ++count) { 2167 here[n].sect = count; 2168 n = (n + il) % F_SECT_PER_TRACK; 2169 if (here[n].sect) { /* sector busy, find next free sector */ 2170 ++n; 2171 if (n >= F_SECT_PER_TRACK) { 2172 n -= F_SECT_PER_TRACK; 2173 while (here[n].sect) 2174 ++n; 2175 } 2176 } 2177 } 2178 if (_floppy->stretch & FD_SECTBASEMASK) { 2179 for (count = 0; count < F_SECT_PER_TRACK; count++) 2180 here[count].sect += FD_SECTBASE(_floppy) - 1; 2181 } 2182 } 2183 2184 static void redo_format(void) 2185 { 2186 buffer_track = -1; 2187 setup_format_params(format_req.track << STRETCH(_floppy)); 2188 floppy_start(); 2189 debugt(__func__, "queue format request"); 2190 } 2191 2192 static const struct cont_t format_cont = { 2193 .interrupt = format_interrupt, 2194 .redo = redo_format, 2195 .error = bad_flp_intr, 2196 .done = generic_done 2197 }; 2198 2199 static int do_format(int drive, struct format_descr *tmp_format_req) 2200 { 2201 int ret; 2202 2203 if (lock_fdc(drive, true)) 2204 return -EINTR; 2205 2206 set_floppy(drive); 2207 if (!_floppy || 2208 _floppy->track > DP->tracks || 2209 tmp_format_req->track >= _floppy->track || 2210 tmp_format_req->head >= _floppy->head || 2211 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || 2212 !_floppy->fmt_gap) { 2213 process_fd_request(); 2214 return -EINVAL; 2215 } 2216 format_req = *tmp_format_req; 2217 format_errors = 0; 2218 cont = &format_cont; 2219 errors = &format_errors; 2220 ret = wait_til_done(redo_format, true); 2221 if (ret == -EINTR) 2222 return -EINTR; 2223 process_fd_request(); 2224 return ret; 2225 } 2226 2227 /* 2228 * Buffer read/write and support 2229 * ============================= 2230 */ 2231 2232 static void floppy_end_request(struct request *req, int error) 2233 { 2234 unsigned int nr_sectors = current_count_sectors; 2235 unsigned int drive = (unsigned long)req->rq_disk->private_data; 2236 2237 /* current_count_sectors can be zero if transfer failed */ 2238 if (error) 2239 nr_sectors = blk_rq_cur_sectors(req); 2240 if (__blk_end_request(req, error, nr_sectors << 9)) 2241 return; 2242 2243 /* We're done with the request */ 2244 floppy_off(drive); 2245 current_req = NULL; 2246 } 2247 2248 /* new request_done. Can handle physical sectors which are smaller than a 2249 * logical buffer */ 2250 static void request_done(int uptodate) 2251 { 2252 struct request *req = current_req; 2253 struct request_queue *q; 2254 unsigned long flags; 2255 int block; 2256 char msg[sizeof("request done ") + sizeof(int) * 3]; 2257 2258 probing = 0; 2259 snprintf(msg, sizeof(msg), "request done %d", uptodate); 2260 reschedule_timeout(MAXTIMEOUT, msg); 2261 2262 if (!req) { 2263 pr_info("floppy.c: no request in request_done\n"); 2264 return; 2265 } 2266 2267 q = req->q; 2268 2269 if (uptodate) { 2270 /* maintain values for invalidation on geometry 2271 * change */ 2272 block = current_count_sectors + blk_rq_pos(req); 2273 INFBOUND(DRS->maxblock, block); 2274 if (block > _floppy->sect) 2275 DRS->maxtrack = 1; 2276 2277 /* unlock chained buffers */ 2278 spin_lock_irqsave(q->queue_lock, flags); 2279 floppy_end_request(req, 0); 2280 spin_unlock_irqrestore(q->queue_lock, flags); 2281 } else { 2282 if (rq_data_dir(req) == WRITE) { 2283 /* record write error information */ 2284 DRWE->write_errors++; 2285 if (DRWE->write_errors == 1) { 2286 DRWE->first_error_sector = blk_rq_pos(req); 2287 DRWE->first_error_generation = DRS->generation; 2288 } 2289 DRWE->last_error_sector = blk_rq_pos(req); 2290 DRWE->last_error_generation = DRS->generation; 2291 } 2292 spin_lock_irqsave(q->queue_lock, flags); 2293 floppy_end_request(req, -EIO); 2294 spin_unlock_irqrestore(q->queue_lock, flags); 2295 } 2296 } 2297 2298 /* Interrupt handler evaluating the result of the r/w operation */ 2299 static void rw_interrupt(void) 2300 { 2301 int eoc; 2302 int ssize; 2303 int heads; 2304 int nr_sectors; 2305 2306 if (R_HEAD >= 2) { 2307 /* some Toshiba floppy controllers occasionnally seem to 2308 * return bogus interrupts after read/write operations, which 2309 * can be recognized by a bad head number (>= 2) */ 2310 return; 2311 } 2312 2313 if (!DRS->first_read_date) 2314 DRS->first_read_date = jiffies; 2315 2316 nr_sectors = 0; 2317 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2318 2319 if (ST1 & ST1_EOC) 2320 eoc = 1; 2321 else 2322 eoc = 0; 2323 2324 if (COMMAND & 0x80) 2325 heads = 2; 2326 else 2327 heads = 1; 2328 2329 nr_sectors = (((R_TRACK - TRACK) * heads + 2330 R_HEAD - HEAD) * SECT_PER_TRACK + 2331 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; 2332 2333 if (nr_sectors / ssize > 2334 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { 2335 DPRINT("long rw: %x instead of %lx\n", 2336 nr_sectors, current_count_sectors); 2337 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); 2338 pr_info("rh=%d h=%d\n", R_HEAD, HEAD); 2339 pr_info("rt=%d t=%d\n", R_TRACK, TRACK); 2340 pr_info("heads=%d eoc=%d\n", heads, eoc); 2341 pr_info("spt=%d st=%d ss=%d\n", 2342 SECT_PER_TRACK, fsector_t, ssize); 2343 pr_info("in_sector_offset=%d\n", in_sector_offset); 2344 } 2345 2346 nr_sectors -= in_sector_offset; 2347 INFBOUND(nr_sectors, 0); 2348 SUPBOUND(current_count_sectors, nr_sectors); 2349 2350 switch (interpret_errors()) { 2351 case 2: 2352 cont->redo(); 2353 return; 2354 case 1: 2355 if (!current_count_sectors) { 2356 cont->error(); 2357 cont->redo(); 2358 return; 2359 } 2360 break; 2361 case 0: 2362 if (!current_count_sectors) { 2363 cont->redo(); 2364 return; 2365 } 2366 current_type[current_drive] = _floppy; 2367 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2368 break; 2369 } 2370 2371 if (probing) { 2372 if (DP->flags & FTD_MSG) 2373 DPRINT("Auto-detected floppy type %s in fd%d\n", 2374 _floppy->name, current_drive); 2375 current_type[current_drive] = _floppy; 2376 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2377 probing = 0; 2378 } 2379 2380 if (CT(COMMAND) != FD_READ || 2381 raw_cmd->kernel_data == current_req->buffer) { 2382 /* transfer directly from buffer */ 2383 cont->done(1); 2384 } else if (CT(COMMAND) == FD_READ) { 2385 buffer_track = raw_cmd->track; 2386 buffer_drive = current_drive; 2387 INFBOUND(buffer_max, nr_sectors + fsector_t); 2388 } 2389 cont->redo(); 2390 } 2391 2392 /* Compute maximal contiguous buffer size. */ 2393 static int buffer_chain_size(void) 2394 { 2395 struct bio_vec *bv; 2396 int size; 2397 struct req_iterator iter; 2398 char *base; 2399 2400 base = bio_data(current_req->bio); 2401 size = 0; 2402 2403 rq_for_each_segment(bv, current_req, iter) { 2404 if (page_address(bv->bv_page) + bv->bv_offset != base + size) 2405 break; 2406 2407 size += bv->bv_len; 2408 } 2409 2410 return size >> 9; 2411 } 2412 2413 /* Compute the maximal transfer size */ 2414 static int transfer_size(int ssize, int max_sector, int max_size) 2415 { 2416 SUPBOUND(max_sector, fsector_t + max_size); 2417 2418 /* alignment */ 2419 max_sector -= (max_sector % _floppy->sect) % ssize; 2420 2421 /* transfer size, beginning not aligned */ 2422 current_count_sectors = max_sector - fsector_t; 2423 2424 return max_sector; 2425 } 2426 2427 /* 2428 * Move data from/to the track buffer to/from the buffer cache. 2429 */ 2430 static void copy_buffer(int ssize, int max_sector, int max_sector_2) 2431 { 2432 int remaining; /* number of transferred 512-byte sectors */ 2433 struct bio_vec *bv; 2434 char *buffer; 2435 char *dma_buffer; 2436 int size; 2437 struct req_iterator iter; 2438 2439 max_sector = transfer_size(ssize, 2440 min(max_sector, max_sector_2), 2441 blk_rq_sectors(current_req)); 2442 2443 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && 2444 buffer_max > fsector_t + blk_rq_sectors(current_req)) 2445 current_count_sectors = min_t(int, buffer_max - fsector_t, 2446 blk_rq_sectors(current_req)); 2447 2448 remaining = current_count_sectors << 9; 2449 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { 2450 DPRINT("in copy buffer\n"); 2451 pr_info("current_count_sectors=%ld\n", current_count_sectors); 2452 pr_info("remaining=%d\n", remaining >> 9); 2453 pr_info("current_req->nr_sectors=%u\n", 2454 blk_rq_sectors(current_req)); 2455 pr_info("current_req->current_nr_sectors=%u\n", 2456 blk_rq_cur_sectors(current_req)); 2457 pr_info("max_sector=%d\n", max_sector); 2458 pr_info("ssize=%d\n", ssize); 2459 } 2460 2461 buffer_max = max(max_sector, buffer_max); 2462 2463 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); 2464 2465 size = blk_rq_cur_bytes(current_req); 2466 2467 rq_for_each_segment(bv, current_req, iter) { 2468 if (!remaining) 2469 break; 2470 2471 size = bv->bv_len; 2472 SUPBOUND(size, remaining); 2473 2474 buffer = page_address(bv->bv_page) + bv->bv_offset; 2475 if (dma_buffer + size > 2476 floppy_track_buffer + (max_buffer_sectors << 10) || 2477 dma_buffer < floppy_track_buffer) { 2478 DPRINT("buffer overrun in copy buffer %d\n", 2479 (int)((floppy_track_buffer - dma_buffer) >> 9)); 2480 pr_info("fsector_t=%d buffer_min=%d\n", 2481 fsector_t, buffer_min); 2482 pr_info("current_count_sectors=%ld\n", 2483 current_count_sectors); 2484 if (CT(COMMAND) == FD_READ) 2485 pr_info("read\n"); 2486 if (CT(COMMAND) == FD_WRITE) 2487 pr_info("write\n"); 2488 break; 2489 } 2490 if (((unsigned long)buffer) % 512) 2491 DPRINT("%p buffer not aligned\n", buffer); 2492 2493 if (CT(COMMAND) == FD_READ) 2494 memcpy(buffer, dma_buffer, size); 2495 else 2496 memcpy(dma_buffer, buffer, size); 2497 2498 remaining -= size; 2499 dma_buffer += size; 2500 } 2501 if (remaining) { 2502 if (remaining > 0) 2503 max_sector -= remaining >> 9; 2504 DPRINT("weirdness: remaining %d\n", remaining >> 9); 2505 } 2506 } 2507 2508 /* work around a bug in pseudo DMA 2509 * (on some FDCs) pseudo DMA does not stop when the CPU stops 2510 * sending data. Hence we need a different way to signal the 2511 * transfer length: We use SECT_PER_TRACK. Unfortunately, this 2512 * does not work with MT, hence we can only transfer one head at 2513 * a time 2514 */ 2515 static void virtualdmabug_workaround(void) 2516 { 2517 int hard_sectors; 2518 int end_sector; 2519 2520 if (CT(COMMAND) == FD_WRITE) { 2521 COMMAND &= ~0x80; /* switch off multiple track mode */ 2522 2523 hard_sectors = raw_cmd->length >> (7 + SIZECODE); 2524 end_sector = SECTOR + hard_sectors - 1; 2525 if (end_sector > SECT_PER_TRACK) { 2526 pr_info("too many sectors %d > %d\n", 2527 end_sector, SECT_PER_TRACK); 2528 return; 2529 } 2530 SECT_PER_TRACK = end_sector; 2531 /* make sure SECT_PER_TRACK 2532 * points to end of transfer */ 2533 } 2534 } 2535 2536 /* 2537 * Formulate a read/write request. 2538 * this routine decides where to load the data (directly to buffer, or to 2539 * tmp floppy area), how much data to load (the size of the buffer, the whole 2540 * track, or a single sector) 2541 * All floppy_track_buffer handling goes in here. If we ever add track buffer 2542 * allocation on the fly, it should be done here. No other part should need 2543 * modification. 2544 */ 2545 2546 static int make_raw_rw_request(void) 2547 { 2548 int aligned_sector_t; 2549 int max_sector; 2550 int max_size; 2551 int tracksize; 2552 int ssize; 2553 2554 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) 2555 return 0; 2556 2557 set_fdc((long)current_req->rq_disk->private_data); 2558 2559 raw_cmd = &default_raw_cmd; 2560 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | 2561 FD_RAW_NEED_SEEK; 2562 raw_cmd->cmd_count = NR_RW; 2563 if (rq_data_dir(current_req) == READ) { 2564 raw_cmd->flags |= FD_RAW_READ; 2565 COMMAND = FM_MODE(_floppy, FD_READ); 2566 } else if (rq_data_dir(current_req) == WRITE) { 2567 raw_cmd->flags |= FD_RAW_WRITE; 2568 COMMAND = FM_MODE(_floppy, FD_WRITE); 2569 } else { 2570 DPRINT("%s: unknown command\n", __func__); 2571 return 0; 2572 } 2573 2574 max_sector = _floppy->sect * _floppy->head; 2575 2576 TRACK = (int)blk_rq_pos(current_req) / max_sector; 2577 fsector_t = (int)blk_rq_pos(current_req) % max_sector; 2578 if (_floppy->track && TRACK >= _floppy->track) { 2579 if (blk_rq_cur_sectors(current_req) & 1) { 2580 current_count_sectors = 1; 2581 return 1; 2582 } else 2583 return 0; 2584 } 2585 HEAD = fsector_t / _floppy->sect; 2586 2587 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || 2588 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && 2589 fsector_t < _floppy->sect) 2590 max_sector = _floppy->sect; 2591 2592 /* 2M disks have phantom sectors on the first track */ 2593 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { 2594 max_sector = 2 * _floppy->sect / 3; 2595 if (fsector_t >= max_sector) { 2596 current_count_sectors = 2597 min_t(int, _floppy->sect - fsector_t, 2598 blk_rq_sectors(current_req)); 2599 return 1; 2600 } 2601 SIZECODE = 2; 2602 } else 2603 SIZECODE = FD_SIZECODE(_floppy); 2604 raw_cmd->rate = _floppy->rate & 0x43; 2605 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) 2606 raw_cmd->rate = 1; 2607 2608 if (SIZECODE) 2609 SIZECODE2 = 0xff; 2610 else 2611 SIZECODE2 = 0x80; 2612 raw_cmd->track = TRACK << STRETCH(_floppy); 2613 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); 2614 GAP = _floppy->gap; 2615 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2616 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; 2617 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + 2618 FD_SECTBASE(_floppy); 2619 2620 /* tracksize describes the size which can be filled up with sectors 2621 * of size ssize. 2622 */ 2623 tracksize = _floppy->sect - _floppy->sect % ssize; 2624 if (tracksize < _floppy->sect) { 2625 SECT_PER_TRACK++; 2626 if (tracksize <= fsector_t % _floppy->sect) 2627 SECTOR--; 2628 2629 /* if we are beyond tracksize, fill up using smaller sectors */ 2630 while (tracksize <= fsector_t % _floppy->sect) { 2631 while (tracksize + ssize > _floppy->sect) { 2632 SIZECODE--; 2633 ssize >>= 1; 2634 } 2635 SECTOR++; 2636 SECT_PER_TRACK++; 2637 tracksize += ssize; 2638 } 2639 max_sector = HEAD * _floppy->sect + tracksize; 2640 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { 2641 max_sector = _floppy->sect; 2642 } else if (!HEAD && CT(COMMAND) == FD_WRITE) { 2643 /* for virtual DMA bug workaround */ 2644 max_sector = _floppy->sect; 2645 } 2646 2647 in_sector_offset = (fsector_t % _floppy->sect) % ssize; 2648 aligned_sector_t = fsector_t - in_sector_offset; 2649 max_size = blk_rq_sectors(current_req); 2650 if ((raw_cmd->track == buffer_track) && 2651 (current_drive == buffer_drive) && 2652 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { 2653 /* data already in track buffer */ 2654 if (CT(COMMAND) == FD_READ) { 2655 copy_buffer(1, max_sector, buffer_max); 2656 return 1; 2657 } 2658 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { 2659 if (CT(COMMAND) == FD_WRITE) { 2660 unsigned int sectors; 2661 2662 sectors = fsector_t + blk_rq_sectors(current_req); 2663 if (sectors > ssize && sectors < ssize + ssize) 2664 max_size = ssize + ssize; 2665 else 2666 max_size = ssize; 2667 } 2668 raw_cmd->flags &= ~FD_RAW_WRITE; 2669 raw_cmd->flags |= FD_RAW_READ; 2670 COMMAND = FM_MODE(_floppy, FD_READ); 2671 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { 2672 unsigned long dma_limit; 2673 int direct, indirect; 2674 2675 indirect = 2676 transfer_size(ssize, max_sector, 2677 max_buffer_sectors * 2) - fsector_t; 2678 2679 /* 2680 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide 2681 * on a 64 bit machine! 2682 */ 2683 max_size = buffer_chain_size(); 2684 dma_limit = (MAX_DMA_ADDRESS - 2685 ((unsigned long)current_req->buffer)) >> 9; 2686 if ((unsigned long)max_size > dma_limit) 2687 max_size = dma_limit; 2688 /* 64 kb boundaries */ 2689 if (CROSS_64KB(current_req->buffer, max_size << 9)) 2690 max_size = (K_64 - 2691 ((unsigned long)current_req->buffer) % 2692 K_64) >> 9; 2693 direct = transfer_size(ssize, max_sector, max_size) - fsector_t; 2694 /* 2695 * We try to read tracks, but if we get too many errors, we 2696 * go back to reading just one sector at a time. 2697 * 2698 * This means we should be able to read a sector even if there 2699 * are other bad sectors on this track. 2700 */ 2701 if (!direct || 2702 (indirect * 2 > direct * 3 && 2703 *errors < DP->max_errors.read_track && 2704 ((!probing || 2705 (DP->read_track & (1 << DRS->probed_format)))))) { 2706 max_size = blk_rq_sectors(current_req); 2707 } else { 2708 raw_cmd->kernel_data = current_req->buffer; 2709 raw_cmd->length = current_count_sectors << 9; 2710 if (raw_cmd->length == 0) { 2711 DPRINT("%s: zero dma transfer attempted\n", __func__); 2712 DPRINT("indirect=%d direct=%d fsector_t=%d\n", 2713 indirect, direct, fsector_t); 2714 return 0; 2715 } 2716 virtualdmabug_workaround(); 2717 return 2; 2718 } 2719 } 2720 2721 if (CT(COMMAND) == FD_READ) 2722 max_size = max_sector; /* unbounded */ 2723 2724 /* claim buffer track if needed */ 2725 if (buffer_track != raw_cmd->track || /* bad track */ 2726 buffer_drive != current_drive || /* bad drive */ 2727 fsector_t > buffer_max || 2728 fsector_t < buffer_min || 2729 ((CT(COMMAND) == FD_READ || 2730 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && 2731 max_sector > 2 * max_buffer_sectors + buffer_min && 2732 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { 2733 /* not enough space */ 2734 buffer_track = -1; 2735 buffer_drive = current_drive; 2736 buffer_max = buffer_min = aligned_sector_t; 2737 } 2738 raw_cmd->kernel_data = floppy_track_buffer + 2739 ((aligned_sector_t - buffer_min) << 9); 2740 2741 if (CT(COMMAND) == FD_WRITE) { 2742 /* copy write buffer to track buffer. 2743 * if we get here, we know that the write 2744 * is either aligned or the data already in the buffer 2745 * (buffer will be overwritten) */ 2746 if (in_sector_offset && buffer_track == -1) 2747 DPRINT("internal error offset !=0 on write\n"); 2748 buffer_track = raw_cmd->track; 2749 buffer_drive = current_drive; 2750 copy_buffer(ssize, max_sector, 2751 2 * max_buffer_sectors + buffer_min); 2752 } else 2753 transfer_size(ssize, max_sector, 2754 2 * max_buffer_sectors + buffer_min - 2755 aligned_sector_t); 2756 2757 /* round up current_count_sectors to get dma xfer size */ 2758 raw_cmd->length = in_sector_offset + current_count_sectors; 2759 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; 2760 raw_cmd->length <<= 9; 2761 if ((raw_cmd->length < current_count_sectors << 9) || 2762 (raw_cmd->kernel_data != current_req->buffer && 2763 CT(COMMAND) == FD_WRITE && 2764 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || 2765 aligned_sector_t < buffer_min)) || 2766 raw_cmd->length % (128 << SIZECODE) || 2767 raw_cmd->length <= 0 || current_count_sectors <= 0) { 2768 DPRINT("fractionary current count b=%lx s=%lx\n", 2769 raw_cmd->length, current_count_sectors); 2770 if (raw_cmd->kernel_data != current_req->buffer) 2771 pr_info("addr=%d, length=%ld\n", 2772 (int)((raw_cmd->kernel_data - 2773 floppy_track_buffer) >> 9), 2774 current_count_sectors); 2775 pr_info("st=%d ast=%d mse=%d msi=%d\n", 2776 fsector_t, aligned_sector_t, max_sector, max_size); 2777 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); 2778 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", 2779 COMMAND, SECTOR, HEAD, TRACK); 2780 pr_info("buffer drive=%d\n", buffer_drive); 2781 pr_info("buffer track=%d\n", buffer_track); 2782 pr_info("buffer_min=%d\n", buffer_min); 2783 pr_info("buffer_max=%d\n", buffer_max); 2784 return 0; 2785 } 2786 2787 if (raw_cmd->kernel_data != current_req->buffer) { 2788 if (raw_cmd->kernel_data < floppy_track_buffer || 2789 current_count_sectors < 0 || 2790 raw_cmd->length < 0 || 2791 raw_cmd->kernel_data + raw_cmd->length > 2792 floppy_track_buffer + (max_buffer_sectors << 10)) { 2793 DPRINT("buffer overrun in schedule dma\n"); 2794 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", 2795 fsector_t, buffer_min, raw_cmd->length >> 9); 2796 pr_info("current_count_sectors=%ld\n", 2797 current_count_sectors); 2798 if (CT(COMMAND) == FD_READ) 2799 pr_info("read\n"); 2800 if (CT(COMMAND) == FD_WRITE) 2801 pr_info("write\n"); 2802 return 0; 2803 } 2804 } else if (raw_cmd->length > blk_rq_bytes(current_req) || 2805 current_count_sectors > blk_rq_sectors(current_req)) { 2806 DPRINT("buffer overrun in direct transfer\n"); 2807 return 0; 2808 } else if (raw_cmd->length < current_count_sectors << 9) { 2809 DPRINT("more sectors than bytes\n"); 2810 pr_info("bytes=%ld\n", raw_cmd->length >> 9); 2811 pr_info("sectors=%ld\n", current_count_sectors); 2812 } 2813 if (raw_cmd->length == 0) { 2814 DPRINT("zero dma transfer attempted from make_raw_request\n"); 2815 return 0; 2816 } 2817 2818 virtualdmabug_workaround(); 2819 return 2; 2820 } 2821 2822 /* 2823 * Round-robin between our available drives, doing one request from each 2824 */ 2825 static int set_next_request(void) 2826 { 2827 struct request_queue *q; 2828 int old_pos = fdc_queue; 2829 2830 do { 2831 q = disks[fdc_queue]->queue; 2832 if (++fdc_queue == N_DRIVE) 2833 fdc_queue = 0; 2834 if (q) { 2835 current_req = blk_fetch_request(q); 2836 if (current_req) 2837 break; 2838 } 2839 } while (fdc_queue != old_pos); 2840 2841 return current_req != NULL; 2842 } 2843 2844 static void redo_fd_request(void) 2845 { 2846 int drive; 2847 int tmp; 2848 2849 lastredo = jiffies; 2850 if (current_drive < N_DRIVE) 2851 floppy_off(current_drive); 2852 2853 do_request: 2854 if (!current_req) { 2855 int pending; 2856 2857 spin_lock_irq(&floppy_lock); 2858 pending = set_next_request(); 2859 spin_unlock_irq(&floppy_lock); 2860 2861 if (!pending) { 2862 do_floppy = NULL; 2863 unlock_fdc(); 2864 return; 2865 } 2866 } 2867 drive = (long)current_req->rq_disk->private_data; 2868 set_fdc(drive); 2869 reschedule_timeout(current_reqD, "redo fd request"); 2870 2871 set_floppy(drive); 2872 raw_cmd = &default_raw_cmd; 2873 raw_cmd->flags = 0; 2874 if (start_motor(redo_fd_request)) 2875 return; 2876 2877 disk_change(current_drive); 2878 if (test_bit(current_drive, &fake_change) || 2879 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { 2880 DPRINT("disk absent or changed during operation\n"); 2881 request_done(0); 2882 goto do_request; 2883 } 2884 if (!_floppy) { /* Autodetection */ 2885 if (!probing) { 2886 DRS->probed_format = 0; 2887 if (next_valid_format()) { 2888 DPRINT("no autodetectable formats\n"); 2889 _floppy = NULL; 2890 request_done(0); 2891 goto do_request; 2892 } 2893 } 2894 probing = 1; 2895 _floppy = floppy_type + DP->autodetect[DRS->probed_format]; 2896 } else 2897 probing = 0; 2898 errors = &(current_req->errors); 2899 tmp = make_raw_rw_request(); 2900 if (tmp < 2) { 2901 request_done(tmp); 2902 goto do_request; 2903 } 2904 2905 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) 2906 twaddle(); 2907 schedule_bh(floppy_start); 2908 debugt(__func__, "queue fd request"); 2909 return; 2910 } 2911 2912 static const struct cont_t rw_cont = { 2913 .interrupt = rw_interrupt, 2914 .redo = redo_fd_request, 2915 .error = bad_flp_intr, 2916 .done = request_done 2917 }; 2918 2919 static void process_fd_request(void) 2920 { 2921 cont = &rw_cont; 2922 schedule_bh(redo_fd_request); 2923 } 2924 2925 static void do_fd_request(struct request_queue *q) 2926 { 2927 if (WARN(max_buffer_sectors == 0, 2928 "VFS: %s called on non-open device\n", __func__)) 2929 return; 2930 2931 if (WARN(atomic_read(&usage_count) == 0, 2932 "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n", 2933 current_req, (long)blk_rq_pos(current_req), current_req->cmd_type, 2934 current_req->cmd_flags)) 2935 return; 2936 2937 if (test_bit(0, &fdc_busy)) { 2938 /* fdc busy, this new request will be treated when the 2939 current one is done */ 2940 is_alive(__func__, "old request running"); 2941 return; 2942 } 2943 lock_fdc(MAXTIMEOUT, false); 2944 process_fd_request(); 2945 is_alive(__func__, ""); 2946 } 2947 2948 static const struct cont_t poll_cont = { 2949 .interrupt = success_and_wakeup, 2950 .redo = floppy_ready, 2951 .error = generic_failure, 2952 .done = generic_done 2953 }; 2954 2955 static int poll_drive(bool interruptible, int flag) 2956 { 2957 /* no auto-sense, just clear dcl */ 2958 raw_cmd = &default_raw_cmd; 2959 raw_cmd->flags = flag; 2960 raw_cmd->track = 0; 2961 raw_cmd->cmd_count = 0; 2962 cont = &poll_cont; 2963 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); 2964 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 2965 2966 return wait_til_done(floppy_ready, interruptible); 2967 } 2968 2969 /* 2970 * User triggered reset 2971 * ==================== 2972 */ 2973 2974 static void reset_intr(void) 2975 { 2976 pr_info("weird, reset interrupt called\n"); 2977 } 2978 2979 static const struct cont_t reset_cont = { 2980 .interrupt = reset_intr, 2981 .redo = success_and_wakeup, 2982 .error = generic_failure, 2983 .done = generic_done 2984 }; 2985 2986 static int user_reset_fdc(int drive, int arg, bool interruptible) 2987 { 2988 int ret; 2989 2990 if (lock_fdc(drive, interruptible)) 2991 return -EINTR; 2992 2993 if (arg == FD_RESET_ALWAYS) 2994 FDCS->reset = 1; 2995 if (FDCS->reset) { 2996 cont = &reset_cont; 2997 ret = wait_til_done(reset_fdc, interruptible); 2998 if (ret == -EINTR) 2999 return -EINTR; 3000 } 3001 process_fd_request(); 3002 return 0; 3003 } 3004 3005 /* 3006 * Misc Ioctl's and support 3007 * ======================== 3008 */ 3009 static inline int fd_copyout(void __user *param, const void *address, 3010 unsigned long size) 3011 { 3012 return copy_to_user(param, address, size) ? -EFAULT : 0; 3013 } 3014 3015 static inline int fd_copyin(void __user *param, void *address, 3016 unsigned long size) 3017 { 3018 return copy_from_user(address, param, size) ? -EFAULT : 0; 3019 } 3020 3021 static const char *drive_name(int type, int drive) 3022 { 3023 struct floppy_struct *floppy; 3024 3025 if (type) 3026 floppy = floppy_type + type; 3027 else { 3028 if (UDP->native_format) 3029 floppy = floppy_type + UDP->native_format; 3030 else 3031 return "(null)"; 3032 } 3033 if (floppy->name) 3034 return floppy->name; 3035 else 3036 return "(null)"; 3037 } 3038 3039 /* raw commands */ 3040 static void raw_cmd_done(int flag) 3041 { 3042 int i; 3043 3044 if (!flag) { 3045 raw_cmd->flags |= FD_RAW_FAILURE; 3046 raw_cmd->flags |= FD_RAW_HARDFAILURE; 3047 } else { 3048 raw_cmd->reply_count = inr; 3049 if (raw_cmd->reply_count > MAX_REPLIES) 3050 raw_cmd->reply_count = 0; 3051 for (i = 0; i < raw_cmd->reply_count; i++) 3052 raw_cmd->reply[i] = reply_buffer[i]; 3053 3054 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3055 unsigned long flags; 3056 flags = claim_dma_lock(); 3057 raw_cmd->length = fd_get_dma_residue(); 3058 release_dma_lock(flags); 3059 } 3060 3061 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && 3062 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) 3063 raw_cmd->flags |= FD_RAW_FAILURE; 3064 3065 if (disk_change(current_drive)) 3066 raw_cmd->flags |= FD_RAW_DISK_CHANGE; 3067 else 3068 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; 3069 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) 3070 motor_off_callback(current_drive); 3071 3072 if (raw_cmd->next && 3073 (!(raw_cmd->flags & FD_RAW_FAILURE) || 3074 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && 3075 ((raw_cmd->flags & FD_RAW_FAILURE) || 3076 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { 3077 raw_cmd = raw_cmd->next; 3078 return; 3079 } 3080 } 3081 generic_done(flag); 3082 } 3083 3084 static const struct cont_t raw_cmd_cont = { 3085 .interrupt = success_and_wakeup, 3086 .redo = floppy_start, 3087 .error = generic_failure, 3088 .done = raw_cmd_done 3089 }; 3090 3091 static int raw_cmd_copyout(int cmd, void __user *param, 3092 struct floppy_raw_cmd *ptr) 3093 { 3094 int ret; 3095 3096 while (ptr) { 3097 ret = copy_to_user(param, ptr, sizeof(*ptr)); 3098 if (ret) 3099 return -EFAULT; 3100 param += sizeof(struct floppy_raw_cmd); 3101 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { 3102 if (ptr->length >= 0 && 3103 ptr->length <= ptr->buffer_length) { 3104 long length = ptr->buffer_length - ptr->length; 3105 ret = fd_copyout(ptr->data, ptr->kernel_data, 3106 length); 3107 if (ret) 3108 return ret; 3109 } 3110 } 3111 ptr = ptr->next; 3112 } 3113 3114 return 0; 3115 } 3116 3117 static void raw_cmd_free(struct floppy_raw_cmd **ptr) 3118 { 3119 struct floppy_raw_cmd *next; 3120 struct floppy_raw_cmd *this; 3121 3122 this = *ptr; 3123 *ptr = NULL; 3124 while (this) { 3125 if (this->buffer_length) { 3126 fd_dma_mem_free((unsigned long)this->kernel_data, 3127 this->buffer_length); 3128 this->buffer_length = 0; 3129 } 3130 next = this->next; 3131 kfree(this); 3132 this = next; 3133 } 3134 } 3135 3136 static int raw_cmd_copyin(int cmd, void __user *param, 3137 struct floppy_raw_cmd **rcmd) 3138 { 3139 struct floppy_raw_cmd *ptr; 3140 int ret; 3141 int i; 3142 3143 *rcmd = NULL; 3144 3145 loop: 3146 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); 3147 if (!ptr) 3148 return -ENOMEM; 3149 *rcmd = ptr; 3150 ret = copy_from_user(ptr, param, sizeof(*ptr)); 3151 if (ret) 3152 return -EFAULT; 3153 ptr->next = NULL; 3154 ptr->buffer_length = 0; 3155 param += sizeof(struct floppy_raw_cmd); 3156 if (ptr->cmd_count > 33) 3157 /* the command may now also take up the space 3158 * initially intended for the reply & the 3159 * reply count. Needed for long 82078 commands 3160 * such as RESTORE, which takes ... 17 command 3161 * bytes. Murphy's law #137: When you reserve 3162 * 16 bytes for a structure, you'll one day 3163 * discover that you really need 17... 3164 */ 3165 return -EINVAL; 3166 3167 for (i = 0; i < 16; i++) 3168 ptr->reply[i] = 0; 3169 ptr->resultcode = 0; 3170 ptr->kernel_data = NULL; 3171 3172 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3173 if (ptr->length <= 0) 3174 return -EINVAL; 3175 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); 3176 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); 3177 if (!ptr->kernel_data) 3178 return -ENOMEM; 3179 ptr->buffer_length = ptr->length; 3180 } 3181 if (ptr->flags & FD_RAW_WRITE) { 3182 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); 3183 if (ret) 3184 return ret; 3185 } 3186 3187 if (ptr->flags & FD_RAW_MORE) { 3188 rcmd = &(ptr->next); 3189 ptr->rate &= 0x43; 3190 goto loop; 3191 } 3192 3193 return 0; 3194 } 3195 3196 static int raw_cmd_ioctl(int cmd, void __user *param) 3197 { 3198 struct floppy_raw_cmd *my_raw_cmd; 3199 int drive; 3200 int ret2; 3201 int ret; 3202 3203 if (FDCS->rawcmd <= 1) 3204 FDCS->rawcmd = 1; 3205 for (drive = 0; drive < N_DRIVE; drive++) { 3206 if (FDC(drive) != fdc) 3207 continue; 3208 if (drive == current_drive) { 3209 if (UDRS->fd_ref > 1) { 3210 FDCS->rawcmd = 2; 3211 break; 3212 } 3213 } else if (UDRS->fd_ref) { 3214 FDCS->rawcmd = 2; 3215 break; 3216 } 3217 } 3218 3219 if (FDCS->reset) 3220 return -EIO; 3221 3222 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); 3223 if (ret) { 3224 raw_cmd_free(&my_raw_cmd); 3225 return ret; 3226 } 3227 3228 raw_cmd = my_raw_cmd; 3229 cont = &raw_cmd_cont; 3230 ret = wait_til_done(floppy_start, true); 3231 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); 3232 3233 if (ret != -EINTR && FDCS->reset) 3234 ret = -EIO; 3235 3236 DRS->track = NO_TRACK; 3237 3238 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); 3239 if (!ret) 3240 ret = ret2; 3241 raw_cmd_free(&my_raw_cmd); 3242 return ret; 3243 } 3244 3245 static int invalidate_drive(struct block_device *bdev) 3246 { 3247 /* invalidate the buffer track to force a reread */ 3248 set_bit((long)bdev->bd_disk->private_data, &fake_change); 3249 process_fd_request(); 3250 check_disk_change(bdev); 3251 return 0; 3252 } 3253 3254 static int set_geometry(unsigned int cmd, struct floppy_struct *g, 3255 int drive, int type, struct block_device *bdev) 3256 { 3257 int cnt; 3258 3259 /* sanity checking for parameters. */ 3260 if (g->sect <= 0 || 3261 g->head <= 0 || 3262 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || 3263 /* check if reserved bits are set */ 3264 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) 3265 return -EINVAL; 3266 if (type) { 3267 if (!capable(CAP_SYS_ADMIN)) 3268 return -EPERM; 3269 mutex_lock(&open_lock); 3270 if (lock_fdc(drive, true)) { 3271 mutex_unlock(&open_lock); 3272 return -EINTR; 3273 } 3274 floppy_type[type] = *g; 3275 floppy_type[type].name = "user format"; 3276 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) 3277 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = 3278 floppy_type[type].size + 1; 3279 process_fd_request(); 3280 for (cnt = 0; cnt < N_DRIVE; cnt++) { 3281 struct block_device *bdev = opened_bdev[cnt]; 3282 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) 3283 continue; 3284 __invalidate_device(bdev, true); 3285 } 3286 mutex_unlock(&open_lock); 3287 } else { 3288 int oldStretch; 3289 3290 if (lock_fdc(drive, true)) 3291 return -EINTR; 3292 if (cmd != FDDEFPRM) { 3293 /* notice a disk change immediately, else 3294 * we lose our settings immediately*/ 3295 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3296 return -EINTR; 3297 } 3298 oldStretch = g->stretch; 3299 user_params[drive] = *g; 3300 if (buffer_drive == drive) 3301 SUPBOUND(buffer_max, user_params[drive].sect); 3302 current_type[drive] = &user_params[drive]; 3303 floppy_sizes[drive] = user_params[drive].size; 3304 if (cmd == FDDEFPRM) 3305 DRS->keep_data = -1; 3306 else 3307 DRS->keep_data = 1; 3308 /* invalidation. Invalidate only when needed, i.e. 3309 * when there are already sectors in the buffer cache 3310 * whose number will change. This is useful, because 3311 * mtools often changes the geometry of the disk after 3312 * looking at the boot block */ 3313 if (DRS->maxblock > user_params[drive].sect || 3314 DRS->maxtrack || 3315 ((user_params[drive].sect ^ oldStretch) & 3316 (FD_SWAPSIDES | FD_SECTBASEMASK))) 3317 invalidate_drive(bdev); 3318 else 3319 process_fd_request(); 3320 } 3321 return 0; 3322 } 3323 3324 /* handle obsolete ioctl's */ 3325 static unsigned int ioctl_table[] = { 3326 FDCLRPRM, 3327 FDSETPRM, 3328 FDDEFPRM, 3329 FDGETPRM, 3330 FDMSGON, 3331 FDMSGOFF, 3332 FDFMTBEG, 3333 FDFMTTRK, 3334 FDFMTEND, 3335 FDSETEMSGTRESH, 3336 FDFLUSH, 3337 FDSETMAXERRS, 3338 FDGETMAXERRS, 3339 FDGETDRVTYP, 3340 FDSETDRVPRM, 3341 FDGETDRVPRM, 3342 FDGETDRVSTAT, 3343 FDPOLLDRVSTAT, 3344 FDRESET, 3345 FDGETFDCSTAT, 3346 FDWERRORCLR, 3347 FDWERRORGET, 3348 FDRAWCMD, 3349 FDEJECT, 3350 FDTWADDLE 3351 }; 3352 3353 static int normalize_ioctl(unsigned int *cmd, int *size) 3354 { 3355 int i; 3356 3357 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { 3358 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { 3359 *size = _IOC_SIZE(*cmd); 3360 *cmd = ioctl_table[i]; 3361 if (*size > _IOC_SIZE(*cmd)) { 3362 pr_info("ioctl not yet supported\n"); 3363 return -EFAULT; 3364 } 3365 return 0; 3366 } 3367 } 3368 return -EINVAL; 3369 } 3370 3371 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) 3372 { 3373 if (type) 3374 *g = &floppy_type[type]; 3375 else { 3376 if (lock_fdc(drive, false)) 3377 return -EINTR; 3378 if (poll_drive(false, 0) == -EINTR) 3379 return -EINTR; 3380 process_fd_request(); 3381 *g = current_type[drive]; 3382 } 3383 if (!*g) 3384 return -ENODEV; 3385 return 0; 3386 } 3387 3388 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) 3389 { 3390 int drive = (long)bdev->bd_disk->private_data; 3391 int type = ITYPE(drive_state[drive].fd_device); 3392 struct floppy_struct *g; 3393 int ret; 3394 3395 ret = get_floppy_geometry(drive, type, &g); 3396 if (ret) 3397 return ret; 3398 3399 geo->heads = g->head; 3400 geo->sectors = g->sect; 3401 geo->cylinders = g->track; 3402 return 0; 3403 } 3404 3405 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 3406 unsigned long param) 3407 { 3408 int drive = (long)bdev->bd_disk->private_data; 3409 int type = ITYPE(UDRS->fd_device); 3410 int i; 3411 int ret; 3412 int size; 3413 union inparam { 3414 struct floppy_struct g; /* geometry */ 3415 struct format_descr f; 3416 struct floppy_max_errors max_errors; 3417 struct floppy_drive_params dp; 3418 } inparam; /* parameters coming from user space */ 3419 const void *outparam; /* parameters passed back to user space */ 3420 3421 /* convert compatibility eject ioctls into floppy eject ioctl. 3422 * We do this in order to provide a means to eject floppy disks before 3423 * installing the new fdutils package */ 3424 if (cmd == CDROMEJECT || /* CD-ROM eject */ 3425 cmd == 0x6470) { /* SunOS floppy eject */ 3426 DPRINT("obsolete eject ioctl\n"); 3427 DPRINT("please use floppycontrol --eject\n"); 3428 cmd = FDEJECT; 3429 } 3430 3431 if (!((cmd & 0xff00) == 0x0200)) 3432 return -EINVAL; 3433 3434 /* convert the old style command into a new style command */ 3435 ret = normalize_ioctl(&cmd, &size); 3436 if (ret) 3437 return ret; 3438 3439 /* permission checks */ 3440 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || 3441 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) 3442 return -EPERM; 3443 3444 if (WARN_ON(size < 0 || size > sizeof(inparam))) 3445 return -EINVAL; 3446 3447 /* copyin */ 3448 memset(&inparam, 0, sizeof(inparam)); 3449 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3450 ret = fd_copyin((void __user *)param, &inparam, size); 3451 if (ret) 3452 return ret; 3453 } 3454 3455 switch (cmd) { 3456 case FDEJECT: 3457 if (UDRS->fd_ref != 1) 3458 /* somebody else has this drive open */ 3459 return -EBUSY; 3460 if (lock_fdc(drive, true)) 3461 return -EINTR; 3462 3463 /* do the actual eject. Fails on 3464 * non-Sparc architectures */ 3465 ret = fd_eject(UNIT(drive)); 3466 3467 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3468 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3469 process_fd_request(); 3470 return ret; 3471 case FDCLRPRM: 3472 if (lock_fdc(drive, true)) 3473 return -EINTR; 3474 current_type[drive] = NULL; 3475 floppy_sizes[drive] = MAX_DISK_SIZE << 1; 3476 UDRS->keep_data = 0; 3477 return invalidate_drive(bdev); 3478 case FDSETPRM: 3479 case FDDEFPRM: 3480 return set_geometry(cmd, &inparam.g, drive, type, bdev); 3481 case FDGETPRM: 3482 ret = get_floppy_geometry(drive, type, 3483 (struct floppy_struct **)&outparam); 3484 if (ret) 3485 return ret; 3486 break; 3487 case FDMSGON: 3488 UDP->flags |= FTD_MSG; 3489 return 0; 3490 case FDMSGOFF: 3491 UDP->flags &= ~FTD_MSG; 3492 return 0; 3493 case FDFMTBEG: 3494 if (lock_fdc(drive, true)) 3495 return -EINTR; 3496 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3497 return -EINTR; 3498 ret = UDRS->flags; 3499 process_fd_request(); 3500 if (ret & FD_VERIFY) 3501 return -ENODEV; 3502 if (!(ret & FD_DISK_WRITABLE)) 3503 return -EROFS; 3504 return 0; 3505 case FDFMTTRK: 3506 if (UDRS->fd_ref != 1) 3507 return -EBUSY; 3508 return do_format(drive, &inparam.f); 3509 case FDFMTEND: 3510 case FDFLUSH: 3511 if (lock_fdc(drive, true)) 3512 return -EINTR; 3513 return invalidate_drive(bdev); 3514 case FDSETEMSGTRESH: 3515 UDP->max_errors.reporting = (unsigned short)(param & 0x0f); 3516 return 0; 3517 case FDGETMAXERRS: 3518 outparam = &UDP->max_errors; 3519 break; 3520 case FDSETMAXERRS: 3521 UDP->max_errors = inparam.max_errors; 3522 break; 3523 case FDGETDRVTYP: 3524 outparam = drive_name(type, drive); 3525 SUPBOUND(size, strlen((const char *)outparam) + 1); 3526 break; 3527 case FDSETDRVPRM: 3528 *UDP = inparam.dp; 3529 break; 3530 case FDGETDRVPRM: 3531 outparam = UDP; 3532 break; 3533 case FDPOLLDRVSTAT: 3534 if (lock_fdc(drive, true)) 3535 return -EINTR; 3536 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3537 return -EINTR; 3538 process_fd_request(); 3539 /* fall through */ 3540 case FDGETDRVSTAT: 3541 outparam = UDRS; 3542 break; 3543 case FDRESET: 3544 return user_reset_fdc(drive, (int)param, true); 3545 case FDGETFDCSTAT: 3546 outparam = UFDCS; 3547 break; 3548 case FDWERRORCLR: 3549 memset(UDRWE, 0, sizeof(*UDRWE)); 3550 return 0; 3551 case FDWERRORGET: 3552 outparam = UDRWE; 3553 break; 3554 case FDRAWCMD: 3555 if (type) 3556 return -EINVAL; 3557 if (lock_fdc(drive, true)) 3558 return -EINTR; 3559 set_floppy(drive); 3560 i = raw_cmd_ioctl(cmd, (void __user *)param); 3561 if (i == -EINTR) 3562 return -EINTR; 3563 process_fd_request(); 3564 return i; 3565 case FDTWADDLE: 3566 if (lock_fdc(drive, true)) 3567 return -EINTR; 3568 twaddle(); 3569 process_fd_request(); 3570 return 0; 3571 default: 3572 return -EINVAL; 3573 } 3574 3575 if (_IOC_DIR(cmd) & _IOC_READ) 3576 return fd_copyout((void __user *)param, outparam, size); 3577 3578 return 0; 3579 } 3580 3581 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 3582 unsigned int cmd, unsigned long param) 3583 { 3584 int ret; 3585 3586 mutex_lock(&floppy_mutex); 3587 ret = fd_locked_ioctl(bdev, mode, cmd, param); 3588 mutex_unlock(&floppy_mutex); 3589 3590 return ret; 3591 } 3592 3593 static void __init config_types(void) 3594 { 3595 bool has_drive = false; 3596 int drive; 3597 3598 /* read drive info out of physical CMOS */ 3599 drive = 0; 3600 if (!UDP->cmos) 3601 UDP->cmos = FLOPPY0_TYPE; 3602 drive = 1; 3603 if (!UDP->cmos && FLOPPY1_TYPE) 3604 UDP->cmos = FLOPPY1_TYPE; 3605 3606 /* FIXME: additional physical CMOS drive detection should go here */ 3607 3608 for (drive = 0; drive < N_DRIVE; drive++) { 3609 unsigned int type = UDP->cmos; 3610 struct floppy_drive_params *params; 3611 const char *name = NULL; 3612 static char temparea[32]; 3613 3614 if (type < ARRAY_SIZE(default_drive_params)) { 3615 params = &default_drive_params[type].params; 3616 if (type) { 3617 name = default_drive_params[type].name; 3618 allowed_drive_mask |= 1 << drive; 3619 } else 3620 allowed_drive_mask &= ~(1 << drive); 3621 } else { 3622 params = &default_drive_params[0].params; 3623 sprintf(temparea, "unknown type %d (usb?)", type); 3624 name = temparea; 3625 } 3626 if (name) { 3627 const char *prepend; 3628 if (!has_drive) { 3629 prepend = ""; 3630 has_drive = true; 3631 pr_info("Floppy drive(s):"); 3632 } else { 3633 prepend = ","; 3634 } 3635 3636 pr_cont("%s fd%d is %s", prepend, drive, name); 3637 } 3638 *UDP = *params; 3639 } 3640 3641 if (has_drive) 3642 pr_cont("\n"); 3643 } 3644 3645 static int floppy_release(struct gendisk *disk, fmode_t mode) 3646 { 3647 int drive = (long)disk->private_data; 3648 3649 mutex_lock(&floppy_mutex); 3650 mutex_lock(&open_lock); 3651 if (UDRS->fd_ref < 0) 3652 UDRS->fd_ref = 0; 3653 else if (!UDRS->fd_ref--) { 3654 DPRINT("floppy_release with fd_ref == 0"); 3655 UDRS->fd_ref = 0; 3656 } 3657 if (!UDRS->fd_ref) 3658 opened_bdev[drive] = NULL; 3659 mutex_unlock(&open_lock); 3660 mutex_unlock(&floppy_mutex); 3661 3662 return 0; 3663 } 3664 3665 /* 3666 * floppy_open check for aliasing (/dev/fd0 can be the same as 3667 * /dev/PS0 etc), and disallows simultaneous access to the same 3668 * drive with different device numbers. 3669 */ 3670 static int floppy_open(struct block_device *bdev, fmode_t mode) 3671 { 3672 int drive = (long)bdev->bd_disk->private_data; 3673 int old_dev, new_dev; 3674 int try; 3675 int res = -EBUSY; 3676 char *tmp; 3677 3678 mutex_lock(&floppy_mutex); 3679 mutex_lock(&open_lock); 3680 old_dev = UDRS->fd_device; 3681 if (opened_bdev[drive] && opened_bdev[drive] != bdev) 3682 goto out2; 3683 3684 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { 3685 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3686 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3687 } 3688 3689 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL))) 3690 goto out2; 3691 3692 if (mode & FMODE_EXCL) 3693 UDRS->fd_ref = -1; 3694 else 3695 UDRS->fd_ref++; 3696 3697 opened_bdev[drive] = bdev; 3698 3699 res = -ENXIO; 3700 3701 if (!floppy_track_buffer) { 3702 /* if opening an ED drive, reserve a big buffer, 3703 * else reserve a small one */ 3704 if ((UDP->cmos == 6) || (UDP->cmos == 5)) 3705 try = 64; /* Only 48 actually useful */ 3706 else 3707 try = 32; /* Only 24 actually useful */ 3708 3709 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3710 if (!tmp && !floppy_track_buffer) { 3711 try >>= 1; /* buffer only one side */ 3712 INFBOUND(try, 16); 3713 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3714 } 3715 if (!tmp && !floppy_track_buffer) 3716 fallback_on_nodma_alloc(&tmp, 2048 * try); 3717 if (!tmp && !floppy_track_buffer) { 3718 DPRINT("Unable to allocate DMA memory\n"); 3719 goto out; 3720 } 3721 if (floppy_track_buffer) { 3722 if (tmp) 3723 fd_dma_mem_free((unsigned long)tmp, try * 1024); 3724 } else { 3725 buffer_min = buffer_max = -1; 3726 floppy_track_buffer = tmp; 3727 max_buffer_sectors = try; 3728 } 3729 } 3730 3731 new_dev = MINOR(bdev->bd_dev); 3732 UDRS->fd_device = new_dev; 3733 set_capacity(disks[drive], floppy_sizes[new_dev]); 3734 if (old_dev != -1 && old_dev != new_dev) { 3735 if (buffer_drive == drive) 3736 buffer_track = -1; 3737 } 3738 3739 if (UFDCS->rawcmd == 1) 3740 UFDCS->rawcmd = 2; 3741 3742 if (!(mode & FMODE_NDELAY)) { 3743 if (mode & (FMODE_READ|FMODE_WRITE)) { 3744 UDRS->last_checked = 0; 3745 check_disk_change(bdev); 3746 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) 3747 goto out; 3748 } 3749 res = -EROFS; 3750 if ((mode & FMODE_WRITE) && 3751 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) 3752 goto out; 3753 } 3754 mutex_unlock(&open_lock); 3755 mutex_unlock(&floppy_mutex); 3756 return 0; 3757 out: 3758 if (UDRS->fd_ref < 0) 3759 UDRS->fd_ref = 0; 3760 else 3761 UDRS->fd_ref--; 3762 if (!UDRS->fd_ref) 3763 opened_bdev[drive] = NULL; 3764 out2: 3765 mutex_unlock(&open_lock); 3766 mutex_unlock(&floppy_mutex); 3767 return res; 3768 } 3769 3770 /* 3771 * Check if the disk has been changed or if a change has been faked. 3772 */ 3773 static int check_floppy_change(struct gendisk *disk) 3774 { 3775 int drive = (long)disk->private_data; 3776 3777 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3778 test_bit(FD_VERIFY_BIT, &UDRS->flags)) 3779 return 1; 3780 3781 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { 3782 lock_fdc(drive, false); 3783 poll_drive(false, 0); 3784 process_fd_request(); 3785 } 3786 3787 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3788 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3789 test_bit(drive, &fake_change) || 3790 drive_no_geom(drive)) 3791 return 1; 3792 return 0; 3793 } 3794 3795 /* 3796 * This implements "read block 0" for floppy_revalidate(). 3797 * Needed for format autodetection, checking whether there is 3798 * a disk in the drive, and whether that disk is writable. 3799 */ 3800 3801 static void floppy_rb0_complete(struct bio *bio, int err) 3802 { 3803 complete((struct completion *)bio->bi_private); 3804 } 3805 3806 static int __floppy_read_block_0(struct block_device *bdev) 3807 { 3808 struct bio bio; 3809 struct bio_vec bio_vec; 3810 struct completion complete; 3811 struct page *page; 3812 size_t size; 3813 3814 page = alloc_page(GFP_NOIO); 3815 if (!page) { 3816 process_fd_request(); 3817 return -ENOMEM; 3818 } 3819 3820 size = bdev->bd_block_size; 3821 if (!size) 3822 size = 1024; 3823 3824 bio_init(&bio); 3825 bio.bi_io_vec = &bio_vec; 3826 bio_vec.bv_page = page; 3827 bio_vec.bv_len = size; 3828 bio_vec.bv_offset = 0; 3829 bio.bi_vcnt = 1; 3830 bio.bi_idx = 0; 3831 bio.bi_size = size; 3832 bio.bi_bdev = bdev; 3833 bio.bi_sector = 0; 3834 bio.bi_flags = BIO_QUIET; 3835 init_completion(&complete); 3836 bio.bi_private = &complete; 3837 bio.bi_end_io = floppy_rb0_complete; 3838 3839 submit_bio(READ, &bio); 3840 generic_unplug_device(bdev_get_queue(bdev)); 3841 process_fd_request(); 3842 wait_for_completion(&complete); 3843 3844 __free_page(page); 3845 3846 return 0; 3847 } 3848 3849 /* revalidate the floppy disk, i.e. trigger format autodetection by reading 3850 * the bootblock (block 0). "Autodetection" is also needed to check whether 3851 * there is a disk in the drive at all... Thus we also do it for fixed 3852 * geometry formats */ 3853 static int floppy_revalidate(struct gendisk *disk) 3854 { 3855 int drive = (long)disk->private_data; 3856 int cf; 3857 int res = 0; 3858 3859 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3860 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3861 test_bit(drive, &fake_change) || 3862 drive_no_geom(drive)) { 3863 if (WARN(atomic_read(&usage_count) == 0, 3864 "VFS: revalidate called on non-open device.\n")) 3865 return -EFAULT; 3866 3867 lock_fdc(drive, false); 3868 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3869 test_bit(FD_VERIFY_BIT, &UDRS->flags)); 3870 if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { 3871 process_fd_request(); /*already done by another thread */ 3872 return 0; 3873 } 3874 UDRS->maxblock = 0; 3875 UDRS->maxtrack = 0; 3876 if (buffer_drive == drive) 3877 buffer_track = -1; 3878 clear_bit(drive, &fake_change); 3879 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3880 if (cf) 3881 UDRS->generation++; 3882 if (drive_no_geom(drive)) { 3883 /* auto-sensing */ 3884 res = __floppy_read_block_0(opened_bdev[drive]); 3885 } else { 3886 if (cf) 3887 poll_drive(false, FD_RAW_NEED_DISK); 3888 process_fd_request(); 3889 } 3890 } 3891 set_capacity(disk, floppy_sizes[UDRS->fd_device]); 3892 return res; 3893 } 3894 3895 static const struct block_device_operations floppy_fops = { 3896 .owner = THIS_MODULE, 3897 .open = floppy_open, 3898 .release = floppy_release, 3899 .ioctl = fd_ioctl, 3900 .getgeo = fd_getgeo, 3901 .media_changed = check_floppy_change, 3902 .revalidate_disk = floppy_revalidate, 3903 }; 3904 3905 /* 3906 * Floppy Driver initialization 3907 * ============================= 3908 */ 3909 3910 /* Determine the floppy disk controller type */ 3911 /* This routine was written by David C. Niemi */ 3912 static char __init get_fdc_version(void) 3913 { 3914 int r; 3915 3916 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ 3917 if (FDCS->reset) 3918 return FDC_NONE; 3919 r = result(); 3920 if (r <= 0x00) 3921 return FDC_NONE; /* No FDC present ??? */ 3922 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3923 pr_info("FDC %d is an 8272A\n", fdc); 3924 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ 3925 } 3926 if (r != 10) { 3927 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", 3928 fdc, r); 3929 return FDC_UNKNOWN; 3930 } 3931 3932 if (!fdc_configure()) { 3933 pr_info("FDC %d is an 82072\n", fdc); 3934 return FDC_82072; /* 82072 doesn't know CONFIGURE */ 3935 } 3936 3937 output_byte(FD_PERPENDICULAR); 3938 if (need_more_output() == MORE_OUTPUT) { 3939 output_byte(0); 3940 } else { 3941 pr_info("FDC %d is an 82072A\n", fdc); 3942 return FDC_82072A; /* 82072A as found on Sparcs. */ 3943 } 3944 3945 output_byte(FD_UNLOCK); 3946 r = result(); 3947 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3948 pr_info("FDC %d is a pre-1991 82077\n", fdc); 3949 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know 3950 * LOCK/UNLOCK */ 3951 } 3952 if ((r != 1) || (reply_buffer[0] != 0x00)) { 3953 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", 3954 fdc, r); 3955 return FDC_UNKNOWN; 3956 } 3957 output_byte(FD_PARTID); 3958 r = result(); 3959 if (r != 1) { 3960 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", 3961 fdc, r); 3962 return FDC_UNKNOWN; 3963 } 3964 if (reply_buffer[0] == 0x80) { 3965 pr_info("FDC %d is a post-1991 82077\n", fdc); 3966 return FDC_82077; /* Revised 82077AA passes all the tests */ 3967 } 3968 switch (reply_buffer[0] >> 5) { 3969 case 0x0: 3970 /* Either a 82078-1 or a 82078SL running at 5Volt */ 3971 pr_info("FDC %d is an 82078.\n", fdc); 3972 return FDC_82078; 3973 case 0x1: 3974 pr_info("FDC %d is a 44pin 82078\n", fdc); 3975 return FDC_82078; 3976 case 0x2: 3977 pr_info("FDC %d is a S82078B\n", fdc); 3978 return FDC_S82078B; 3979 case 0x3: 3980 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); 3981 return FDC_87306; 3982 default: 3983 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", 3984 fdc, reply_buffer[0] >> 5); 3985 return FDC_82078_UNKN; 3986 } 3987 } /* get_fdc_version */ 3988 3989 /* lilo configuration */ 3990 3991 static void __init floppy_set_flags(int *ints, int param, int param2) 3992 { 3993 int i; 3994 3995 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3996 if (param) 3997 default_drive_params[i].params.flags |= param2; 3998 else 3999 default_drive_params[i].params.flags &= ~param2; 4000 } 4001 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); 4002 } 4003 4004 static void __init daring(int *ints, int param, int param2) 4005 { 4006 int i; 4007 4008 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 4009 if (param) { 4010 default_drive_params[i].params.select_delay = 0; 4011 default_drive_params[i].params.flags |= 4012 FD_SILENT_DCL_CLEAR; 4013 } else { 4014 default_drive_params[i].params.select_delay = 4015 2 * HZ / 100; 4016 default_drive_params[i].params.flags &= 4017 ~FD_SILENT_DCL_CLEAR; 4018 } 4019 } 4020 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); 4021 } 4022 4023 static void __init set_cmos(int *ints, int dummy, int dummy2) 4024 { 4025 int current_drive = 0; 4026 4027 if (ints[0] != 2) { 4028 DPRINT("wrong number of parameters for CMOS\n"); 4029 return; 4030 } 4031 current_drive = ints[1]; 4032 if (current_drive < 0 || current_drive >= 8) { 4033 DPRINT("bad drive for set_cmos\n"); 4034 return; 4035 } 4036 #if N_FDC > 1 4037 if (current_drive >= 4 && !FDC2) 4038 FDC2 = 0x370; 4039 #endif 4040 DP->cmos = ints[2]; 4041 DPRINT("setting CMOS code to %d\n", ints[2]); 4042 } 4043 4044 static struct param_table { 4045 const char *name; 4046 void (*fn) (int *ints, int param, int param2); 4047 int *var; 4048 int def_param; 4049 int param2; 4050 } config_params[] __initdata = { 4051 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4052 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4053 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, 4054 {"irq", NULL, &FLOPPY_IRQ, 6, 0}, 4055 {"dma", NULL, &FLOPPY_DMA, 2, 0}, 4056 {"daring", daring, NULL, 1, 0}, 4057 #if N_FDC > 1 4058 {"two_fdc", NULL, &FDC2, 0x370, 0}, 4059 {"one_fdc", NULL, &FDC2, 0, 0}, 4060 #endif 4061 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, 4062 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, 4063 {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, 4064 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, 4065 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, 4066 {"nodma", NULL, &can_use_virtual_dma, 1, 0}, 4067 {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, 4068 {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, 4069 {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, 4070 {"nofifo", NULL, &no_fifo, 0x20, 0}, 4071 {"usefifo", NULL, &no_fifo, 0, 0}, 4072 {"cmos", set_cmos, NULL, 0, 0}, 4073 {"slow", NULL, &slow_floppy, 1, 0}, 4074 {"unexpected_interrupts", NULL, &print_unex, 1, 0}, 4075 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, 4076 {"L40SX", NULL, &print_unex, 0, 0} 4077 4078 EXTRA_FLOPPY_PARAMS 4079 }; 4080 4081 static int __init floppy_setup(char *str) 4082 { 4083 int i; 4084 int param; 4085 int ints[11]; 4086 4087 str = get_options(str, ARRAY_SIZE(ints), ints); 4088 if (str) { 4089 for (i = 0; i < ARRAY_SIZE(config_params); i++) { 4090 if (strcmp(str, config_params[i].name) == 0) { 4091 if (ints[0]) 4092 param = ints[1]; 4093 else 4094 param = config_params[i].def_param; 4095 if (config_params[i].fn) 4096 config_params[i].fn(ints, param, 4097 config_params[i]. 4098 param2); 4099 if (config_params[i].var) { 4100 DPRINT("%s=%d\n", str, param); 4101 *config_params[i].var = param; 4102 } 4103 return 1; 4104 } 4105 } 4106 } 4107 if (str) { 4108 DPRINT("unknown floppy option [%s]\n", str); 4109 4110 DPRINT("allowed options are:"); 4111 for (i = 0; i < ARRAY_SIZE(config_params); i++) 4112 pr_cont(" %s", config_params[i].name); 4113 pr_cont("\n"); 4114 } else 4115 DPRINT("botched floppy option\n"); 4116 DPRINT("Read Documentation/blockdev/floppy.txt\n"); 4117 return 0; 4118 } 4119 4120 static int have_no_fdc = -ENODEV; 4121 4122 static ssize_t floppy_cmos_show(struct device *dev, 4123 struct device_attribute *attr, char *buf) 4124 { 4125 struct platform_device *p = to_platform_device(dev); 4126 int drive; 4127 4128 drive = p->id; 4129 return sprintf(buf, "%X\n", UDP->cmos); 4130 } 4131 4132 static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); 4133 4134 static void floppy_device_release(struct device *dev) 4135 { 4136 } 4137 4138 static int floppy_resume(struct device *dev) 4139 { 4140 int fdc; 4141 4142 for (fdc = 0; fdc < N_FDC; fdc++) 4143 if (FDCS->address != -1) 4144 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4145 4146 return 0; 4147 } 4148 4149 static const struct dev_pm_ops floppy_pm_ops = { 4150 .resume = floppy_resume, 4151 .restore = floppy_resume, 4152 }; 4153 4154 static struct platform_driver floppy_driver = { 4155 .driver = { 4156 .name = "floppy", 4157 .pm = &floppy_pm_ops, 4158 }, 4159 }; 4160 4161 static struct platform_device floppy_device[N_DRIVE]; 4162 4163 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 4164 { 4165 int drive = (*part & 3) | ((*part & 0x80) >> 5); 4166 if (drive >= N_DRIVE || 4167 !(allowed_drive_mask & (1 << drive)) || 4168 fdc_state[FDC(drive)].version == FDC_NONE) 4169 return NULL; 4170 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) 4171 return NULL; 4172 *part = 0; 4173 return get_disk(disks[drive]); 4174 } 4175 4176 static int __init floppy_init(void) 4177 { 4178 int i, unit, drive; 4179 int err, dr; 4180 4181 set_debugt(); 4182 interruptjiffies = resultjiffies = jiffies; 4183 4184 #if defined(CONFIG_PPC) 4185 if (check_legacy_ioport(FDC1)) 4186 return -ENODEV; 4187 #endif 4188 4189 raw_cmd = NULL; 4190 4191 for (dr = 0; dr < N_DRIVE; dr++) { 4192 disks[dr] = alloc_disk(1); 4193 if (!disks[dr]) { 4194 err = -ENOMEM; 4195 goto out_put_disk; 4196 } 4197 4198 disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock); 4199 if (!disks[dr]->queue) { 4200 err = -ENOMEM; 4201 goto out_put_disk; 4202 } 4203 4204 blk_queue_max_hw_sectors(disks[dr]->queue, 64); 4205 disks[dr]->major = FLOPPY_MAJOR; 4206 disks[dr]->first_minor = TOMINOR(dr); 4207 disks[dr]->fops = &floppy_fops; 4208 sprintf(disks[dr]->disk_name, "fd%d", dr); 4209 4210 init_timer(&motor_off_timer[dr]); 4211 motor_off_timer[dr].data = dr; 4212 motor_off_timer[dr].function = motor_off_callback; 4213 } 4214 4215 err = register_blkdev(FLOPPY_MAJOR, "fd"); 4216 if (err) 4217 goto out_put_disk; 4218 4219 err = platform_driver_register(&floppy_driver); 4220 if (err) 4221 goto out_unreg_blkdev; 4222 4223 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 4224 floppy_find, NULL, NULL); 4225 4226 for (i = 0; i < 256; i++) 4227 if (ITYPE(i)) 4228 floppy_sizes[i] = floppy_type[ITYPE(i)].size; 4229 else 4230 floppy_sizes[i] = MAX_DISK_SIZE << 1; 4231 4232 reschedule_timeout(MAXTIMEOUT, "floppy init"); 4233 config_types(); 4234 4235 for (i = 0; i < N_FDC; i++) { 4236 fdc = i; 4237 memset(FDCS, 0, sizeof(*FDCS)); 4238 FDCS->dtr = -1; 4239 FDCS->dor = 0x4; 4240 #if defined(__sparc__) || defined(__mc68000__) 4241 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ 4242 #ifdef __mc68000__ 4243 if (MACH_IS_SUN3X) 4244 #endif 4245 FDCS->version = FDC_82072A; 4246 #endif 4247 } 4248 4249 use_virtual_dma = can_use_virtual_dma & 1; 4250 fdc_state[0].address = FDC1; 4251 if (fdc_state[0].address == -1) { 4252 del_timer(&fd_timeout); 4253 err = -ENODEV; 4254 goto out_unreg_region; 4255 } 4256 #if N_FDC > 1 4257 fdc_state[1].address = FDC2; 4258 #endif 4259 4260 fdc = 0; /* reset fdc in case of unexpected interrupt */ 4261 err = floppy_grab_irq_and_dma(); 4262 if (err) { 4263 del_timer(&fd_timeout); 4264 err = -EBUSY; 4265 goto out_unreg_region; 4266 } 4267 4268 /* initialise drive state */ 4269 for (drive = 0; drive < N_DRIVE; drive++) { 4270 memset(UDRS, 0, sizeof(*UDRS)); 4271 memset(UDRWE, 0, sizeof(*UDRWE)); 4272 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 4273 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 4274 set_bit(FD_VERIFY_BIT, &UDRS->flags); 4275 UDRS->fd_device = -1; 4276 floppy_track_buffer = NULL; 4277 max_buffer_sectors = 0; 4278 } 4279 /* 4280 * Small 10 msec delay to let through any interrupt that 4281 * initialization might have triggered, to not 4282 * confuse detection: 4283 */ 4284 msleep(10); 4285 4286 for (i = 0; i < N_FDC; i++) { 4287 fdc = i; 4288 FDCS->driver_version = FD_DRIVER_VERSION; 4289 for (unit = 0; unit < 4; unit++) 4290 FDCS->track[unit] = 0; 4291 if (FDCS->address == -1) 4292 continue; 4293 FDCS->rawcmd = 2; 4294 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { 4295 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4296 floppy_release_regions(fdc); 4297 FDCS->address = -1; 4298 FDCS->version = FDC_NONE; 4299 continue; 4300 } 4301 /* Try to determine the floppy controller type */ 4302 FDCS->version = get_fdc_version(); 4303 if (FDCS->version == FDC_NONE) { 4304 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4305 floppy_release_regions(fdc); 4306 FDCS->address = -1; 4307 continue; 4308 } 4309 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) 4310 can_use_virtual_dma = 0; 4311 4312 have_no_fdc = 0; 4313 /* Not all FDCs seem to be able to handle the version command 4314 * properly, so force a reset for the standard FDC clones, 4315 * to avoid interrupt garbage. 4316 */ 4317 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4318 } 4319 fdc = 0; 4320 del_timer(&fd_timeout); 4321 current_drive = 0; 4322 initialized = true; 4323 if (have_no_fdc) { 4324 DPRINT("no floppy controllers found\n"); 4325 err = have_no_fdc; 4326 goto out_flush_work; 4327 } 4328 4329 for (drive = 0; drive < N_DRIVE; drive++) { 4330 if (!(allowed_drive_mask & (1 << drive))) 4331 continue; 4332 if (fdc_state[FDC(drive)].version == FDC_NONE) 4333 continue; 4334 4335 floppy_device[drive].name = floppy_device_name; 4336 floppy_device[drive].id = drive; 4337 floppy_device[drive].dev.release = floppy_device_release; 4338 4339 err = platform_device_register(&floppy_device[drive]); 4340 if (err) 4341 goto out_flush_work; 4342 4343 err = device_create_file(&floppy_device[drive].dev, 4344 &dev_attr_cmos); 4345 if (err) 4346 goto out_unreg_platform_dev; 4347 4348 /* to be cleaned up... */ 4349 disks[drive]->private_data = (void *)(long)drive; 4350 disks[drive]->flags |= GENHD_FL_REMOVABLE; 4351 disks[drive]->driverfs_dev = &floppy_device[drive].dev; 4352 add_disk(disks[drive]); 4353 } 4354 4355 return 0; 4356 4357 out_unreg_platform_dev: 4358 platform_device_unregister(&floppy_device[drive]); 4359 out_flush_work: 4360 flush_work_sync(&floppy_work); 4361 if (atomic_read(&usage_count)) 4362 floppy_release_irq_and_dma(); 4363 out_unreg_region: 4364 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4365 platform_driver_unregister(&floppy_driver); 4366 out_unreg_blkdev: 4367 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4368 out_put_disk: 4369 while (dr--) { 4370 del_timer(&motor_off_timer[dr]); 4371 if (disks[dr]->queue) 4372 blk_cleanup_queue(disks[dr]->queue); 4373 put_disk(disks[dr]); 4374 } 4375 return err; 4376 } 4377 4378 static const struct io_region { 4379 int offset; 4380 int size; 4381 } io_regions[] = { 4382 { 2, 1 }, 4383 /* address + 3 is sometimes reserved by pnp bios for motherboard */ 4384 { 4, 2 }, 4385 /* address + 6 is reserved, and may be taken by IDE. 4386 * Unfortunately, Adaptec doesn't know this :-(, */ 4387 { 7, 1 }, 4388 }; 4389 4390 static void floppy_release_allocated_regions(int fdc, const struct io_region *p) 4391 { 4392 while (p != io_regions) { 4393 p--; 4394 release_region(FDCS->address + p->offset, p->size); 4395 } 4396 } 4397 4398 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) 4399 4400 static int floppy_request_regions(int fdc) 4401 { 4402 const struct io_region *p; 4403 4404 for (p = io_regions; p < ARRAY_END(io_regions); p++) { 4405 if (!request_region(FDCS->address + p->offset, 4406 p->size, "floppy")) { 4407 DPRINT("Floppy io-port 0x%04lx in use\n", 4408 FDCS->address + p->offset); 4409 floppy_release_allocated_regions(fdc, p); 4410 return -EBUSY; 4411 } 4412 } 4413 return 0; 4414 } 4415 4416 static void floppy_release_regions(int fdc) 4417 { 4418 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); 4419 } 4420 4421 static int floppy_grab_irq_and_dma(void) 4422 { 4423 if (atomic_inc_return(&usage_count) > 1) 4424 return 0; 4425 4426 /* 4427 * We might have scheduled a free_irq(), wait it to 4428 * drain first: 4429 */ 4430 flush_work_sync(&floppy_work); 4431 4432 if (fd_request_irq()) { 4433 DPRINT("Unable to grab IRQ%d for the floppy driver\n", 4434 FLOPPY_IRQ); 4435 atomic_dec(&usage_count); 4436 return -1; 4437 } 4438 if (fd_request_dma()) { 4439 DPRINT("Unable to grab DMA%d for the floppy driver\n", 4440 FLOPPY_DMA); 4441 if (can_use_virtual_dma & 2) 4442 use_virtual_dma = can_use_virtual_dma = 1; 4443 if (!(can_use_virtual_dma & 1)) { 4444 fd_free_irq(); 4445 atomic_dec(&usage_count); 4446 return -1; 4447 } 4448 } 4449 4450 for (fdc = 0; fdc < N_FDC; fdc++) { 4451 if (FDCS->address != -1) { 4452 if (floppy_request_regions(fdc)) 4453 goto cleanup; 4454 } 4455 } 4456 for (fdc = 0; fdc < N_FDC; fdc++) { 4457 if (FDCS->address != -1) { 4458 reset_fdc_info(1); 4459 fd_outb(FDCS->dor, FD_DOR); 4460 } 4461 } 4462 fdc = 0; 4463 set_dor(0, ~0, 8); /* avoid immediate interrupt */ 4464 4465 for (fdc = 0; fdc < N_FDC; fdc++) 4466 if (FDCS->address != -1) 4467 fd_outb(FDCS->dor, FD_DOR); 4468 /* 4469 * The driver will try and free resources and relies on us 4470 * to know if they were allocated or not. 4471 */ 4472 fdc = 0; 4473 irqdma_allocated = 1; 4474 return 0; 4475 cleanup: 4476 fd_free_irq(); 4477 fd_free_dma(); 4478 while (--fdc >= 0) 4479 floppy_release_regions(fdc); 4480 atomic_dec(&usage_count); 4481 return -1; 4482 } 4483 4484 static void floppy_release_irq_and_dma(void) 4485 { 4486 int old_fdc; 4487 #ifndef __sparc__ 4488 int drive; 4489 #endif 4490 long tmpsize; 4491 unsigned long tmpaddr; 4492 4493 if (!atomic_dec_and_test(&usage_count)) 4494 return; 4495 4496 if (irqdma_allocated) { 4497 fd_disable_dma(); 4498 fd_free_dma(); 4499 fd_free_irq(); 4500 irqdma_allocated = 0; 4501 } 4502 set_dor(0, ~0, 8); 4503 #if N_FDC > 1 4504 set_dor(1, ~8, 0); 4505 #endif 4506 floppy_enable_hlt(); 4507 4508 if (floppy_track_buffer && max_buffer_sectors) { 4509 tmpsize = max_buffer_sectors * 1024; 4510 tmpaddr = (unsigned long)floppy_track_buffer; 4511 floppy_track_buffer = NULL; 4512 max_buffer_sectors = 0; 4513 buffer_min = buffer_max = -1; 4514 fd_dma_mem_free(tmpaddr, tmpsize); 4515 } 4516 #ifndef __sparc__ 4517 for (drive = 0; drive < N_FDC * 4; drive++) 4518 if (timer_pending(motor_off_timer + drive)) 4519 pr_info("motor off timer %d still active\n", drive); 4520 #endif 4521 4522 if (timer_pending(&fd_timeout)) 4523 pr_info("floppy timer still active:%s\n", timeout_message); 4524 if (timer_pending(&fd_timer)) 4525 pr_info("auxiliary floppy timer still active\n"); 4526 if (work_pending(&floppy_work)) 4527 pr_info("work still pending\n"); 4528 old_fdc = fdc; 4529 for (fdc = 0; fdc < N_FDC; fdc++) 4530 if (FDCS->address != -1) 4531 floppy_release_regions(fdc); 4532 fdc = old_fdc; 4533 } 4534 4535 #ifdef MODULE 4536 4537 static char *floppy; 4538 4539 static void __init parse_floppy_cfg_string(char *cfg) 4540 { 4541 char *ptr; 4542 4543 while (*cfg) { 4544 ptr = cfg; 4545 while (*cfg && *cfg != ' ' && *cfg != '\t') 4546 cfg++; 4547 if (*cfg) { 4548 *cfg = '\0'; 4549 cfg++; 4550 } 4551 if (*ptr) 4552 floppy_setup(ptr); 4553 } 4554 } 4555 4556 static int __init floppy_module_init(void) 4557 { 4558 if (floppy) 4559 parse_floppy_cfg_string(floppy); 4560 return floppy_init(); 4561 } 4562 module_init(floppy_module_init); 4563 4564 static void __exit floppy_module_exit(void) 4565 { 4566 int drive; 4567 4568 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4569 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4570 platform_driver_unregister(&floppy_driver); 4571 4572 for (drive = 0; drive < N_DRIVE; drive++) { 4573 del_timer_sync(&motor_off_timer[drive]); 4574 4575 if ((allowed_drive_mask & (1 << drive)) && 4576 fdc_state[FDC(drive)].version != FDC_NONE) { 4577 del_gendisk(disks[drive]); 4578 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); 4579 platform_device_unregister(&floppy_device[drive]); 4580 } 4581 blk_cleanup_queue(disks[drive]->queue); 4582 put_disk(disks[drive]); 4583 } 4584 4585 del_timer_sync(&fd_timeout); 4586 del_timer_sync(&fd_timer); 4587 4588 if (atomic_read(&usage_count)) 4589 floppy_release_irq_and_dma(); 4590 4591 /* eject disk, if any */ 4592 fd_eject(0); 4593 } 4594 4595 module_exit(floppy_module_exit); 4596 4597 module_param(floppy, charp, 0); 4598 module_param(FLOPPY_IRQ, int, 0); 4599 module_param(FLOPPY_DMA, int, 0); 4600 MODULE_AUTHOR("Alain L. Knaff"); 4601 MODULE_SUPPORTED_DEVICE("fd"); 4602 MODULE_LICENSE("GPL"); 4603 4604 /* This doesn't actually get used other than for module information */ 4605 static const struct pnp_device_id floppy_pnpids[] = { 4606 {"PNP0700", 0}, 4607 {} 4608 }; 4609 4610 MODULE_DEVICE_TABLE(pnp, floppy_pnpids); 4611 4612 #else 4613 4614 __setup("floppy=", floppy_setup); 4615 module_init(floppy_init) 4616 #endif 4617 4618 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 4619