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/smp_lock.h> 182 #include <linux/string.h> 183 #include <linux/jiffies.h> 184 #include <linux/fcntl.h> 185 #include <linux/delay.h> 186 #include <linux/mc146818rtc.h> /* CMOS defines */ 187 #include <linux/ioport.h> 188 #include <linux/interrupt.h> 189 #include <linux/init.h> 190 #include <linux/platform_device.h> 191 #include <linux/mod_devicetable.h> 192 #include <linux/buffer_head.h> /* for invalidate_buffers() */ 193 #include <linux/mutex.h> 194 #include <linux/io.h> 195 #include <linux/uaccess.h> 196 197 /* 198 * PS/2 floppies have much slower step rates than regular floppies. 199 * It's been recommended that take about 1/4 of the default speed 200 * in some more extreme cases. 201 */ 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 struct request_queue *floppy_queue; 262 static void do_fd_request(struct request_queue *q); 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; 416 417 /* 418 * This struct defines the different floppy types. 419 * 420 * Bit 0 of 'stretch' tells if the tracks need to be doubled for some 421 * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' 422 * tells if the disk is in Commodore 1581 format, which means side 0 sectors 423 * are located on side 1 of the disk but with a side 0 ID, and vice-versa. 424 * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the 425 * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical 426 * side 0 is on physical side 0 (but with the misnamed sector IDs). 427 * 'stretch' should probably be renamed to something more general, like 428 * 'options'. 429 * 430 * Bits 2 through 9 of 'stretch' tell the number of the first sector. 431 * The LSB (bit 2) is flipped. For most disks, the first sector 432 * is 1 (represented by 0x00<<2). For some CP/M and music sampler 433 * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). 434 * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). 435 * 436 * Other parameters should be self-explanatory (see also setfdprm(8)). 437 */ 438 /* 439 Size 440 | Sectors per track 441 | | Head 442 | | | Tracks 443 | | | | Stretch 444 | | | | | Gap 1 size 445 | | | | | | Data rate, | 0x40 for perp 446 | | | | | | | Spec1 (stepping rate, head unload 447 | | | | | | | | /fmt gap (gap2) */ 448 static struct floppy_struct floppy_type[32] = { 449 { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ 450 { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ 451 { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ 452 { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ 453 { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ 454 { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ 455 { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ 456 { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ 457 { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ 458 { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ 459 460 { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ 461 { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ 462 { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ 463 { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ 464 { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ 465 { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ 466 { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ 467 { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ 468 { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ 469 { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ 470 471 { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ 472 { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ 473 { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ 474 { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ 475 { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ 476 { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ 477 { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ 478 { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ 479 { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ 480 { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ 481 482 { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ 483 { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ 484 }; 485 486 #define SECTSIZE (_FD_SECTSIZE(*floppy)) 487 488 /* Auto-detection: Disk type used until the next media change occurs. */ 489 static struct floppy_struct *current_type[N_DRIVE]; 490 491 /* 492 * User-provided type information. current_type points to 493 * the respective entry of this array. 494 */ 495 static struct floppy_struct user_params[N_DRIVE]; 496 497 static sector_t floppy_sizes[256]; 498 499 static char floppy_device_name[] = "floppy"; 500 501 /* 502 * The driver is trying to determine the correct media format 503 * while probing is set. rw_interrupt() clears it after a 504 * successful access. 505 */ 506 static int probing; 507 508 /* Synchronization of FDC access. */ 509 #define FD_COMMAND_NONE -1 510 #define FD_COMMAND_ERROR 2 511 #define FD_COMMAND_OKAY 3 512 513 static volatile int command_status = FD_COMMAND_NONE; 514 static unsigned long fdc_busy; 515 static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); 516 static DECLARE_WAIT_QUEUE_HEAD(command_done); 517 518 /* Errors during formatting are counted here. */ 519 static int format_errors; 520 521 /* Format request descriptor. */ 522 static struct format_descr format_req; 523 524 /* 525 * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps 526 * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), 527 * H is head unload time (1=16ms, 2=32ms, etc) 528 */ 529 530 /* 531 * Track buffer 532 * Because these are written to by the DMA controller, they must 533 * not contain a 64k byte boundary crossing, or data will be 534 * corrupted/lost. 535 */ 536 static char *floppy_track_buffer; 537 static int max_buffer_sectors; 538 539 static int *errors; 540 typedef void (*done_f)(int); 541 static const struct cont_t { 542 void (*interrupt)(void); 543 /* this is called after the interrupt of the 544 * main command */ 545 void (*redo)(void); /* this is called to retry the operation */ 546 void (*error)(void); /* this is called to tally an error */ 547 done_f done; /* this is called to say if the operation has 548 * succeeded/failed */ 549 } *cont; 550 551 static void floppy_ready(void); 552 static void floppy_start(void); 553 static void process_fd_request(void); 554 static void recalibrate_floppy(void); 555 static void floppy_shutdown(unsigned long); 556 557 static int floppy_request_regions(int); 558 static void floppy_release_regions(int); 559 static int floppy_grab_irq_and_dma(void); 560 static void floppy_release_irq_and_dma(void); 561 562 /* 563 * The "reset" variable should be tested whenever an interrupt is scheduled, 564 * after the commands have been sent. This is to ensure that the driver doesn't 565 * get wedged when the interrupt doesn't come because of a failed command. 566 * reset doesn't need to be tested before sending commands, because 567 * output_byte is automatically disabled when reset is set. 568 */ 569 static void reset_fdc(void); 570 571 /* 572 * These are global variables, as that's the easiest way to give 573 * information to interrupts. They are the data used for the current 574 * request. 575 */ 576 #define NO_TRACK -1 577 #define NEED_1_RECAL -2 578 #define NEED_2_RECAL -3 579 580 static atomic_t usage_count = ATOMIC_INIT(0); 581 582 /* buffer related variables */ 583 static int buffer_track = -1; 584 static int buffer_drive = -1; 585 static int buffer_min = -1; 586 static int buffer_max = -1; 587 588 /* fdc related variables, should end up in a struct */ 589 static struct floppy_fdc_state fdc_state[N_FDC]; 590 static int fdc; /* current fdc */ 591 592 static struct floppy_struct *_floppy = floppy_type; 593 static unsigned char current_drive; 594 static long current_count_sectors; 595 static unsigned char fsector_t; /* sector in track */ 596 static unsigned char in_sector_offset; /* offset within physical sector, 597 * expressed in units of 512 bytes */ 598 599 #ifndef fd_eject 600 static inline int fd_eject(int drive) 601 { 602 return -EINVAL; 603 } 604 #endif 605 606 /* 607 * Debugging 608 * ========= 609 */ 610 #ifdef DEBUGT 611 static long unsigned debugtimer; 612 613 static inline void set_debugt(void) 614 { 615 debugtimer = jiffies; 616 } 617 618 static inline void debugt(const char *func, const char *msg) 619 { 620 if (DP->flags & DEBUGT) 621 pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); 622 } 623 #else 624 static inline void set_debugt(void) { } 625 static inline void debugt(const char *func, const char *msg) { } 626 #endif /* DEBUGT */ 627 628 typedef void (*timeout_fn)(unsigned long); 629 static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); 630 631 static const char *timeout_message; 632 633 static void is_alive(const char *func, const char *message) 634 { 635 /* this routine checks whether the floppy driver is "alive" */ 636 if (test_bit(0, &fdc_busy) && command_status < 2 && 637 !timer_pending(&fd_timeout)) { 638 DPRINT("%s: timeout handler died. %s\n", func, message); 639 } 640 } 641 642 static void (*do_floppy)(void) = NULL; 643 644 #define OLOGSIZE 20 645 646 static void (*lasthandler)(void); 647 static unsigned long interruptjiffies; 648 static unsigned long resultjiffies; 649 static int resultsize; 650 static unsigned long lastredo; 651 652 static struct output_log { 653 unsigned char data; 654 unsigned char status; 655 unsigned long jiffies; 656 } output_log[OLOGSIZE]; 657 658 static int output_log_pos; 659 660 #define current_reqD -1 661 #define MAXTIMEOUT -2 662 663 static void __reschedule_timeout(int drive, const char *message) 664 { 665 if (drive == current_reqD) 666 drive = current_drive; 667 del_timer(&fd_timeout); 668 if (drive < 0 || drive >= N_DRIVE) { 669 fd_timeout.expires = jiffies + 20UL * HZ; 670 drive = 0; 671 } else 672 fd_timeout.expires = jiffies + UDP->timeout; 673 add_timer(&fd_timeout); 674 if (UDP->flags & FD_DEBUG) 675 DPRINT("reschedule timeout %s\n", message); 676 timeout_message = message; 677 } 678 679 static void reschedule_timeout(int drive, const char *message) 680 { 681 unsigned long flags; 682 683 spin_lock_irqsave(&floppy_lock, flags); 684 __reschedule_timeout(drive, message); 685 spin_unlock_irqrestore(&floppy_lock, flags); 686 } 687 688 #define INFBOUND(a, b) (a) = max_t(int, a, b) 689 #define SUPBOUND(a, b) (a) = min_t(int, a, b) 690 691 /* 692 * Bottom half floppy driver. 693 * ========================== 694 * 695 * This part of the file contains the code talking directly to the hardware, 696 * and also the main service loop (seek-configure-spinup-command) 697 */ 698 699 /* 700 * disk change. 701 * This routine is responsible for maintaining the FD_DISK_CHANGE flag, 702 * and the last_checked date. 703 * 704 * last_checked is the date of the last check which showed 'no disk change' 705 * FD_DISK_CHANGE is set under two conditions: 706 * 1. The floppy has been changed after some i/o to that floppy already 707 * took place. 708 * 2. No floppy disk is in the drive. This is done in order to ensure that 709 * requests are quickly flushed in case there is no disk in the drive. It 710 * follows that FD_DISK_CHANGE can only be cleared if there is a disk in 711 * the drive. 712 * 713 * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. 714 * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on 715 * each seek. If a disk is present, the disk change line should also be 716 * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk 717 * change line is set, this means either that no disk is in the drive, or 718 * that it has been removed since the last seek. 719 * 720 * This means that we really have a third possibility too: 721 * The floppy has been changed after the last seek. 722 */ 723 724 static int disk_change(int drive) 725 { 726 int fdc = FDC(drive); 727 728 if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) 729 DPRINT("WARNING disk change called early\n"); 730 if (!(FDCS->dor & (0x10 << UNIT(drive))) || 731 (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { 732 DPRINT("probing disk change on unselected drive\n"); 733 DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), 734 (unsigned int)FDCS->dor); 735 } 736 737 debug_dcl(UDP->flags, 738 "checking disk change line for drive %d\n", drive); 739 debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); 740 debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); 741 debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); 742 743 if (UDP->flags & FD_BROKEN_DCL) 744 return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 745 if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { 746 set_bit(FD_VERIFY_BIT, &UDRS->flags); 747 /* verify write protection */ 748 749 if (UDRS->maxblock) /* mark it changed */ 750 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 751 752 /* invalidate its geometry */ 753 if (UDRS->keep_data >= 0) { 754 if ((UDP->flags & FTD_MSG) && 755 current_type[drive] != NULL) 756 DPRINT("Disk type is undefined after disk change\n"); 757 current_type[drive] = NULL; 758 floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; 759 } 760 761 return 1; 762 } else { 763 UDRS->last_checked = jiffies; 764 clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 765 } 766 return 0; 767 } 768 769 static inline int is_selected(int dor, int unit) 770 { 771 return ((dor & (0x10 << unit)) && (dor & 3) == unit); 772 } 773 774 static bool is_ready_state(int status) 775 { 776 int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); 777 return state == STATUS_READY; 778 } 779 780 static int set_dor(int fdc, char mask, char data) 781 { 782 unsigned char unit; 783 unsigned char drive; 784 unsigned char newdor; 785 unsigned char olddor; 786 787 if (FDCS->address == -1) 788 return -1; 789 790 olddor = FDCS->dor; 791 newdor = (olddor & mask) | data; 792 if (newdor != olddor) { 793 unit = olddor & 0x3; 794 if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { 795 drive = REVDRIVE(fdc, unit); 796 debug_dcl(UDP->flags, 797 "calling disk change from set_dor\n"); 798 disk_change(drive); 799 } 800 FDCS->dor = newdor; 801 fd_outb(newdor, FD_DOR); 802 803 unit = newdor & 0x3; 804 if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { 805 drive = REVDRIVE(fdc, unit); 806 UDRS->select_date = jiffies; 807 } 808 } 809 return olddor; 810 } 811 812 static void twaddle(void) 813 { 814 if (DP->select_delay) 815 return; 816 fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); 817 fd_outb(FDCS->dor, FD_DOR); 818 DRS->select_date = jiffies; 819 } 820 821 /* 822 * Reset all driver information about the current fdc. 823 * This is needed after a reset, and after a raw command. 824 */ 825 static void reset_fdc_info(int mode) 826 { 827 int drive; 828 829 FDCS->spec1 = FDCS->spec2 = -1; 830 FDCS->need_configure = 1; 831 FDCS->perp_mode = 1; 832 FDCS->rawcmd = 0; 833 for (drive = 0; drive < N_DRIVE; drive++) 834 if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) 835 UDRS->track = NEED_2_RECAL; 836 } 837 838 /* selects the fdc and drive, and enables the fdc's input/dma. */ 839 static void set_fdc(int drive) 840 { 841 if (drive >= 0 && drive < N_DRIVE) { 842 fdc = FDC(drive); 843 current_drive = drive; 844 } 845 if (fdc != 1 && fdc != 0) { 846 pr_info("bad fdc value\n"); 847 return; 848 } 849 set_dor(fdc, ~0, 8); 850 #if N_FDC > 1 851 set_dor(1 - fdc, ~8, 0); 852 #endif 853 if (FDCS->rawcmd == 2) 854 reset_fdc_info(1); 855 if (fd_inb(FD_STATUS) != STATUS_READY) 856 FDCS->reset = 1; 857 } 858 859 /* locks the driver */ 860 static int lock_fdc(int drive, bool interruptible) 861 { 862 if (WARN(atomic_read(&usage_count) == 0, 863 "Trying to lock fdc while usage count=0\n")) 864 return -1; 865 866 if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) 867 return -EINTR; 868 869 command_status = FD_COMMAND_NONE; 870 871 __reschedule_timeout(drive, "lock fdc"); 872 set_fdc(drive); 873 return 0; 874 } 875 876 /* unlocks the driver */ 877 static void unlock_fdc(void) 878 { 879 unsigned long flags; 880 881 raw_cmd = NULL; 882 if (!test_bit(0, &fdc_busy)) 883 DPRINT("FDC access conflict!\n"); 884 885 if (do_floppy) 886 DPRINT("device interrupt still active at FDC release: %pf!\n", 887 do_floppy); 888 command_status = FD_COMMAND_NONE; 889 spin_lock_irqsave(&floppy_lock, flags); 890 del_timer(&fd_timeout); 891 cont = NULL; 892 clear_bit(0, &fdc_busy); 893 if (current_req || blk_peek_request(floppy_queue)) 894 do_fd_request(floppy_queue); 895 spin_unlock_irqrestore(&floppy_lock, flags); 896 wake_up(&fdc_wait); 897 } 898 899 /* switches the motor off after a given timeout */ 900 static void motor_off_callback(unsigned long nr) 901 { 902 unsigned char mask = ~(0x10 << UNIT(nr)); 903 904 set_dor(FDC(nr), mask, 0); 905 } 906 907 /* schedules motor off */ 908 static void floppy_off(unsigned int drive) 909 { 910 unsigned long volatile delta; 911 int fdc = FDC(drive); 912 913 if (!(FDCS->dor & (0x10 << UNIT(drive)))) 914 return; 915 916 del_timer(motor_off_timer + drive); 917 918 /* make spindle stop in a position which minimizes spinup time 919 * next time */ 920 if (UDP->rps) { 921 delta = jiffies - UDRS->first_read_date + HZ - 922 UDP->spindown_offset; 923 delta = ((delta * UDP->rps) % HZ) / UDP->rps; 924 motor_off_timer[drive].expires = 925 jiffies + UDP->spindown - delta; 926 } 927 add_timer(motor_off_timer + drive); 928 } 929 930 /* 931 * cycle through all N_DRIVE floppy drives, for disk change testing. 932 * stopping at current drive. This is done before any long operation, to 933 * be sure to have up to date disk change information. 934 */ 935 static void scandrives(void) 936 { 937 int i; 938 int drive; 939 int saved_drive; 940 941 if (DP->select_delay) 942 return; 943 944 saved_drive = current_drive; 945 for (i = 0; i < N_DRIVE; i++) { 946 drive = (saved_drive + i + 1) % N_DRIVE; 947 if (UDRS->fd_ref == 0 || UDP->select_delay != 0) 948 continue; /* skip closed drives */ 949 set_fdc(drive); 950 if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & 951 (0x10 << UNIT(drive)))) 952 /* switch the motor off again, if it was off to 953 * begin with */ 954 set_dor(fdc, ~(0x10 << UNIT(drive)), 0); 955 } 956 set_fdc(saved_drive); 957 } 958 959 static void empty(void) 960 { 961 } 962 963 static DECLARE_WORK(floppy_work, NULL); 964 965 static void schedule_bh(void (*handler)(void)) 966 { 967 PREPARE_WORK(&floppy_work, (work_func_t)handler); 968 schedule_work(&floppy_work); 969 } 970 971 static DEFINE_TIMER(fd_timer, NULL, 0, 0); 972 973 static void cancel_activity(void) 974 { 975 unsigned long flags; 976 977 spin_lock_irqsave(&floppy_lock, flags); 978 do_floppy = NULL; 979 PREPARE_WORK(&floppy_work, (work_func_t)empty); 980 del_timer(&fd_timer); 981 spin_unlock_irqrestore(&floppy_lock, flags); 982 } 983 984 /* this function makes sure that the disk stays in the drive during the 985 * transfer */ 986 static void fd_watchdog(void) 987 { 988 debug_dcl(DP->flags, "calling disk change from watchdog\n"); 989 990 if (disk_change(current_drive)) { 991 DPRINT("disk removed during i/o\n"); 992 cancel_activity(); 993 cont->done(0); 994 reset_fdc(); 995 } else { 996 del_timer(&fd_timer); 997 fd_timer.function = (timeout_fn)fd_watchdog; 998 fd_timer.expires = jiffies + HZ / 10; 999 add_timer(&fd_timer); 1000 } 1001 } 1002 1003 static void main_command_interrupt(void) 1004 { 1005 del_timer(&fd_timer); 1006 cont->interrupt(); 1007 } 1008 1009 /* waits for a delay (spinup or select) to pass */ 1010 static int fd_wait_for_completion(unsigned long delay, timeout_fn function) 1011 { 1012 if (FDCS->reset) { 1013 reset_fdc(); /* do the reset during sleep to win time 1014 * if we don't need to sleep, it's a good 1015 * occasion anyways */ 1016 return 1; 1017 } 1018 1019 if (time_before(jiffies, delay)) { 1020 del_timer(&fd_timer); 1021 fd_timer.function = function; 1022 fd_timer.expires = delay; 1023 add_timer(&fd_timer); 1024 return 1; 1025 } 1026 return 0; 1027 } 1028 1029 static DEFINE_SPINLOCK(floppy_hlt_lock); 1030 static int hlt_disabled; 1031 static void floppy_disable_hlt(void) 1032 { 1033 unsigned long flags; 1034 1035 spin_lock_irqsave(&floppy_hlt_lock, flags); 1036 if (!hlt_disabled) { 1037 hlt_disabled = 1; 1038 #ifdef HAVE_DISABLE_HLT 1039 disable_hlt(); 1040 #endif 1041 } 1042 spin_unlock_irqrestore(&floppy_hlt_lock, flags); 1043 } 1044 1045 static void floppy_enable_hlt(void) 1046 { 1047 unsigned long flags; 1048 1049 spin_lock_irqsave(&floppy_hlt_lock, flags); 1050 if (hlt_disabled) { 1051 hlt_disabled = 0; 1052 #ifdef HAVE_DISABLE_HLT 1053 enable_hlt(); 1054 #endif 1055 } 1056 spin_unlock_irqrestore(&floppy_hlt_lock, flags); 1057 } 1058 1059 static void setup_DMA(void) 1060 { 1061 unsigned long f; 1062 1063 if (raw_cmd->length == 0) { 1064 int i; 1065 1066 pr_info("zero dma transfer size:"); 1067 for (i = 0; i < raw_cmd->cmd_count; i++) 1068 pr_cont("%x,", raw_cmd->cmd[i]); 1069 pr_cont("\n"); 1070 cont->done(0); 1071 FDCS->reset = 1; 1072 return; 1073 } 1074 if (((unsigned long)raw_cmd->kernel_data) % 512) { 1075 pr_info("non aligned address: %p\n", raw_cmd->kernel_data); 1076 cont->done(0); 1077 FDCS->reset = 1; 1078 return; 1079 } 1080 f = claim_dma_lock(); 1081 fd_disable_dma(); 1082 #ifdef fd_dma_setup 1083 if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, 1084 (raw_cmd->flags & FD_RAW_READ) ? 1085 DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { 1086 release_dma_lock(f); 1087 cont->done(0); 1088 FDCS->reset = 1; 1089 return; 1090 } 1091 release_dma_lock(f); 1092 #else 1093 fd_clear_dma_ff(); 1094 fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); 1095 fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? 1096 DMA_MODE_READ : DMA_MODE_WRITE); 1097 fd_set_dma_addr(raw_cmd->kernel_data); 1098 fd_set_dma_count(raw_cmd->length); 1099 virtual_dma_port = FDCS->address; 1100 fd_enable_dma(); 1101 release_dma_lock(f); 1102 #endif 1103 floppy_disable_hlt(); 1104 } 1105 1106 static void show_floppy(void); 1107 1108 /* waits until the fdc becomes ready */ 1109 static int wait_til_ready(void) 1110 { 1111 int status; 1112 int counter; 1113 1114 if (FDCS->reset) 1115 return -1; 1116 for (counter = 0; counter < 10000; counter++) { 1117 status = fd_inb(FD_STATUS); 1118 if (status & STATUS_READY) 1119 return status; 1120 } 1121 if (initialized) { 1122 DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); 1123 show_floppy(); 1124 } 1125 FDCS->reset = 1; 1126 return -1; 1127 } 1128 1129 /* sends a command byte to the fdc */ 1130 static int output_byte(char byte) 1131 { 1132 int status = wait_til_ready(); 1133 1134 if (status < 0) 1135 return -1; 1136 1137 if (is_ready_state(status)) { 1138 fd_outb(byte, FD_DATA); 1139 output_log[output_log_pos].data = byte; 1140 output_log[output_log_pos].status = status; 1141 output_log[output_log_pos].jiffies = jiffies; 1142 output_log_pos = (output_log_pos + 1) % OLOGSIZE; 1143 return 0; 1144 } 1145 FDCS->reset = 1; 1146 if (initialized) { 1147 DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", 1148 byte, fdc, status); 1149 show_floppy(); 1150 } 1151 return -1; 1152 } 1153 1154 /* gets the response from the fdc */ 1155 static int result(void) 1156 { 1157 int i; 1158 int status = 0; 1159 1160 for (i = 0; i < MAX_REPLIES; i++) { 1161 status = wait_til_ready(); 1162 if (status < 0) 1163 break; 1164 status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; 1165 if ((status & ~STATUS_BUSY) == STATUS_READY) { 1166 resultjiffies = jiffies; 1167 resultsize = i; 1168 return i; 1169 } 1170 if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) 1171 reply_buffer[i] = fd_inb(FD_DATA); 1172 else 1173 break; 1174 } 1175 if (initialized) { 1176 DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", 1177 fdc, status, i); 1178 show_floppy(); 1179 } 1180 FDCS->reset = 1; 1181 return -1; 1182 } 1183 1184 #define MORE_OUTPUT -2 1185 /* does the fdc need more output? */ 1186 static int need_more_output(void) 1187 { 1188 int status = wait_til_ready(); 1189 1190 if (status < 0) 1191 return -1; 1192 1193 if (is_ready_state(status)) 1194 return MORE_OUTPUT; 1195 1196 return result(); 1197 } 1198 1199 /* Set perpendicular mode as required, based on data rate, if supported. 1200 * 82077 Now tested. 1Mbps data rate only possible with 82077-1. 1201 */ 1202 static void perpendicular_mode(void) 1203 { 1204 unsigned char perp_mode; 1205 1206 if (raw_cmd->rate & 0x40) { 1207 switch (raw_cmd->rate & 3) { 1208 case 0: 1209 perp_mode = 2; 1210 break; 1211 case 3: 1212 perp_mode = 3; 1213 break; 1214 default: 1215 DPRINT("Invalid data rate for perpendicular mode!\n"); 1216 cont->done(0); 1217 FDCS->reset = 1; 1218 /* 1219 * convenient way to return to 1220 * redo without too much hassle 1221 * (deep stack et al.) 1222 */ 1223 return; 1224 } 1225 } else 1226 perp_mode = 0; 1227 1228 if (FDCS->perp_mode == perp_mode) 1229 return; 1230 if (FDCS->version >= FDC_82077_ORIG) { 1231 output_byte(FD_PERPENDICULAR); 1232 output_byte(perp_mode); 1233 FDCS->perp_mode = perp_mode; 1234 } else if (perp_mode) { 1235 DPRINT("perpendicular mode not supported by this FDC.\n"); 1236 } 1237 } /* perpendicular_mode */ 1238 1239 static int fifo_depth = 0xa; 1240 static int no_fifo; 1241 1242 static int fdc_configure(void) 1243 { 1244 /* Turn on FIFO */ 1245 output_byte(FD_CONFIGURE); 1246 if (need_more_output() != MORE_OUTPUT) 1247 return 0; 1248 output_byte(0); 1249 output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); 1250 output_byte(0); /* pre-compensation from track 1251 0 upwards */ 1252 return 1; 1253 } 1254 1255 #define NOMINAL_DTR 500 1256 1257 /* Issue a "SPECIFY" command to set the step rate time, head unload time, 1258 * head load time, and DMA disable flag to values needed by floppy. 1259 * 1260 * The value "dtr" is the data transfer rate in Kbps. It is needed 1261 * to account for the data rate-based scaling done by the 82072 and 82077 1262 * FDC types. This parameter is ignored for other types of FDCs (i.e. 1263 * 8272a). 1264 * 1265 * Note that changing the data transfer rate has a (probably deleterious) 1266 * effect on the parameters subject to scaling for 82072/82077 FDCs, so 1267 * fdc_specify is called again after each data transfer rate 1268 * change. 1269 * 1270 * srt: 1000 to 16000 in microseconds 1271 * hut: 16 to 240 milliseconds 1272 * hlt: 2 to 254 milliseconds 1273 * 1274 * These values are rounded up to the next highest available delay time. 1275 */ 1276 static void fdc_specify(void) 1277 { 1278 unsigned char spec1; 1279 unsigned char spec2; 1280 unsigned long srt; 1281 unsigned long hlt; 1282 unsigned long hut; 1283 unsigned long dtr = NOMINAL_DTR; 1284 unsigned long scale_dtr = NOMINAL_DTR; 1285 int hlt_max_code = 0x7f; 1286 int hut_max_code = 0xf; 1287 1288 if (FDCS->need_configure && FDCS->version >= FDC_82072A) { 1289 fdc_configure(); 1290 FDCS->need_configure = 0; 1291 } 1292 1293 switch (raw_cmd->rate & 0x03) { 1294 case 3: 1295 dtr = 1000; 1296 break; 1297 case 1: 1298 dtr = 300; 1299 if (FDCS->version >= FDC_82078) { 1300 /* chose the default rate table, not the one 1301 * where 1 = 2 Mbps */ 1302 output_byte(FD_DRIVESPEC); 1303 if (need_more_output() == MORE_OUTPUT) { 1304 output_byte(UNIT(current_drive)); 1305 output_byte(0xc0); 1306 } 1307 } 1308 break; 1309 case 2: 1310 dtr = 250; 1311 break; 1312 } 1313 1314 if (FDCS->version >= FDC_82072) { 1315 scale_dtr = dtr; 1316 hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ 1317 hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ 1318 } 1319 1320 /* Convert step rate from microseconds to milliseconds and 4 bits */ 1321 srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); 1322 if (slow_floppy) 1323 srt = srt / 4; 1324 1325 SUPBOUND(srt, 0xf); 1326 INFBOUND(srt, 0); 1327 1328 hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); 1329 if (hlt < 0x01) 1330 hlt = 0x01; 1331 else if (hlt > 0x7f) 1332 hlt = hlt_max_code; 1333 1334 hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); 1335 if (hut < 0x1) 1336 hut = 0x1; 1337 else if (hut > 0xf) 1338 hut = hut_max_code; 1339 1340 spec1 = (srt << 4) | hut; 1341 spec2 = (hlt << 1) | (use_virtual_dma & 1); 1342 1343 /* If these parameters did not change, just return with success */ 1344 if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { 1345 /* Go ahead and set spec1 and spec2 */ 1346 output_byte(FD_SPECIFY); 1347 output_byte(FDCS->spec1 = spec1); 1348 output_byte(FDCS->spec2 = spec2); 1349 } 1350 } /* fdc_specify */ 1351 1352 /* Set the FDC's data transfer rate on behalf of the specified drive. 1353 * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue 1354 * of the specify command (i.e. using the fdc_specify function). 1355 */ 1356 static int fdc_dtr(void) 1357 { 1358 /* If data rate not already set to desired value, set it. */ 1359 if ((raw_cmd->rate & 3) == FDCS->dtr) 1360 return 0; 1361 1362 /* Set dtr */ 1363 fd_outb(raw_cmd->rate & 3, FD_DCR); 1364 1365 /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) 1366 * need a stabilization period of several milliseconds to be 1367 * enforced after data rate changes before R/W operations. 1368 * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) 1369 */ 1370 FDCS->dtr = raw_cmd->rate & 3; 1371 return fd_wait_for_completion(jiffies + 2UL * HZ / 100, 1372 (timeout_fn)floppy_ready); 1373 } /* fdc_dtr */ 1374 1375 static void tell_sector(void) 1376 { 1377 pr_cont(": track %d, head %d, sector %d, size %d", 1378 R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); 1379 } /* tell_sector */ 1380 1381 static void print_errors(void) 1382 { 1383 DPRINT(""); 1384 if (ST0 & ST0_ECE) { 1385 pr_cont("Recalibrate failed!"); 1386 } else if (ST2 & ST2_CRC) { 1387 pr_cont("data CRC error"); 1388 tell_sector(); 1389 } else if (ST1 & ST1_CRC) { 1390 pr_cont("CRC error"); 1391 tell_sector(); 1392 } else if ((ST1 & (ST1_MAM | ST1_ND)) || 1393 (ST2 & ST2_MAM)) { 1394 if (!probing) { 1395 pr_cont("sector not found"); 1396 tell_sector(); 1397 } else 1398 pr_cont("probe failed..."); 1399 } else if (ST2 & ST2_WC) { /* seek error */ 1400 pr_cont("wrong cylinder"); 1401 } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ 1402 pr_cont("bad cylinder"); 1403 } else { 1404 pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", 1405 ST0, ST1, ST2); 1406 tell_sector(); 1407 } 1408 pr_cont("\n"); 1409 } 1410 1411 /* 1412 * OK, this error interpreting routine is called after a 1413 * DMA read/write has succeeded 1414 * or failed, so we check the results, and copy any buffers. 1415 * hhb: Added better error reporting. 1416 * ak: Made this into a separate routine. 1417 */ 1418 static int interpret_errors(void) 1419 { 1420 char bad; 1421 1422 if (inr != 7) { 1423 DPRINT("-- FDC reply error\n"); 1424 FDCS->reset = 1; 1425 return 1; 1426 } 1427 1428 /* check IC to find cause of interrupt */ 1429 switch (ST0 & ST0_INTR) { 1430 case 0x40: /* error occurred during command execution */ 1431 if (ST1 & ST1_EOC) 1432 return 0; /* occurs with pseudo-DMA */ 1433 bad = 1; 1434 if (ST1 & ST1_WP) { 1435 DPRINT("Drive is write protected\n"); 1436 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1437 cont->done(0); 1438 bad = 2; 1439 } else if (ST1 & ST1_ND) { 1440 set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1441 } else if (ST1 & ST1_OR) { 1442 if (DP->flags & FTD_MSG) 1443 DPRINT("Over/Underrun - retrying\n"); 1444 bad = 0; 1445 } else if (*errors >= DP->max_errors.reporting) { 1446 print_errors(); 1447 } 1448 if (ST2 & ST2_WC || ST2 & ST2_BC) 1449 /* wrong cylinder => recal */ 1450 DRS->track = NEED_2_RECAL; 1451 return bad; 1452 case 0x80: /* invalid command given */ 1453 DPRINT("Invalid FDC command given!\n"); 1454 cont->done(0); 1455 return 2; 1456 case 0xc0: 1457 DPRINT("Abnormal termination caused by polling\n"); 1458 cont->error(); 1459 return 2; 1460 default: /* (0) Normal command termination */ 1461 return 0; 1462 } 1463 } 1464 1465 /* 1466 * This routine is called when everything should be correctly set up 1467 * for the transfer (i.e. floppy motor is on, the correct floppy is 1468 * selected, and the head is sitting on the right track). 1469 */ 1470 static void setup_rw_floppy(void) 1471 { 1472 int i; 1473 int r; 1474 int flags; 1475 int dflags; 1476 unsigned long ready_date; 1477 timeout_fn function; 1478 1479 flags = raw_cmd->flags; 1480 if (flags & (FD_RAW_READ | FD_RAW_WRITE)) 1481 flags |= FD_RAW_INTR; 1482 1483 if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { 1484 ready_date = DRS->spinup_date + DP->spinup; 1485 /* If spinup will take a long time, rerun scandrives 1486 * again just before spinup completion. Beware that 1487 * after scandrives, we must again wait for selection. 1488 */ 1489 if (time_after(ready_date, jiffies + DP->select_delay)) { 1490 ready_date -= DP->select_delay; 1491 function = (timeout_fn)floppy_start; 1492 } else 1493 function = (timeout_fn)setup_rw_floppy; 1494 1495 /* wait until the floppy is spinning fast enough */ 1496 if (fd_wait_for_completion(ready_date, function)) 1497 return; 1498 } 1499 dflags = DRS->flags; 1500 1501 if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) 1502 setup_DMA(); 1503 1504 if (flags & FD_RAW_INTR) 1505 do_floppy = main_command_interrupt; 1506 1507 r = 0; 1508 for (i = 0; i < raw_cmd->cmd_count; i++) 1509 r |= output_byte(raw_cmd->cmd[i]); 1510 1511 debugt(__func__, "rw_command"); 1512 1513 if (r) { 1514 cont->error(); 1515 reset_fdc(); 1516 return; 1517 } 1518 1519 if (!(flags & FD_RAW_INTR)) { 1520 inr = result(); 1521 cont->interrupt(); 1522 } else if (flags & FD_RAW_NEED_DISK) 1523 fd_watchdog(); 1524 } 1525 1526 static int blind_seek; 1527 1528 /* 1529 * This is the routine called after every seek (or recalibrate) interrupt 1530 * from the floppy controller. 1531 */ 1532 static void seek_interrupt(void) 1533 { 1534 debugt(__func__, ""); 1535 if (inr != 2 || (ST0 & 0xF8) != 0x20) { 1536 DPRINT("seek failed\n"); 1537 DRS->track = NEED_2_RECAL; 1538 cont->error(); 1539 cont->redo(); 1540 return; 1541 } 1542 if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { 1543 debug_dcl(DP->flags, 1544 "clearing NEWCHANGE flag because of effective seek\n"); 1545 debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); 1546 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1547 /* effective seek */ 1548 DRS->select_date = jiffies; 1549 } 1550 DRS->track = ST1; 1551 floppy_ready(); 1552 } 1553 1554 static void check_wp(void) 1555 { 1556 if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { 1557 /* check write protection */ 1558 output_byte(FD_GETSTATUS); 1559 output_byte(UNIT(current_drive)); 1560 if (result() != 1) { 1561 FDCS->reset = 1; 1562 return; 1563 } 1564 clear_bit(FD_VERIFY_BIT, &DRS->flags); 1565 clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); 1566 debug_dcl(DP->flags, 1567 "checking whether disk is write protected\n"); 1568 debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); 1569 if (!(ST3 & 0x40)) 1570 set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1571 else 1572 clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); 1573 } 1574 } 1575 1576 static void seek_floppy(void) 1577 { 1578 int track; 1579 1580 blind_seek = 0; 1581 1582 debug_dcl(DP->flags, "calling disk change from %s\n", __func__); 1583 1584 if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1585 disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { 1586 /* the media changed flag should be cleared after the seek. 1587 * If it isn't, this means that there is really no disk in 1588 * the drive. 1589 */ 1590 set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); 1591 cont->done(0); 1592 cont->redo(); 1593 return; 1594 } 1595 if (DRS->track <= NEED_1_RECAL) { 1596 recalibrate_floppy(); 1597 return; 1598 } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && 1599 (raw_cmd->flags & FD_RAW_NEED_DISK) && 1600 (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { 1601 /* we seek to clear the media-changed condition. Does anybody 1602 * know a more elegant way, which works on all drives? */ 1603 if (raw_cmd->track) 1604 track = raw_cmd->track - 1; 1605 else { 1606 if (DP->flags & FD_SILENT_DCL_CLEAR) { 1607 set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); 1608 blind_seek = 1; 1609 raw_cmd->flags |= FD_RAW_NEED_SEEK; 1610 } 1611 track = 1; 1612 } 1613 } else { 1614 check_wp(); 1615 if (raw_cmd->track != DRS->track && 1616 (raw_cmd->flags & FD_RAW_NEED_SEEK)) 1617 track = raw_cmd->track; 1618 else { 1619 setup_rw_floppy(); 1620 return; 1621 } 1622 } 1623 1624 do_floppy = seek_interrupt; 1625 output_byte(FD_SEEK); 1626 output_byte(UNIT(current_drive)); 1627 if (output_byte(track) < 0) { 1628 reset_fdc(); 1629 return; 1630 } 1631 debugt(__func__, ""); 1632 } 1633 1634 static void recal_interrupt(void) 1635 { 1636 debugt(__func__, ""); 1637 if (inr != 2) 1638 FDCS->reset = 1; 1639 else if (ST0 & ST0_ECE) { 1640 switch (DRS->track) { 1641 case NEED_1_RECAL: 1642 debugt(__func__, "need 1 recal"); 1643 /* after a second recalibrate, we still haven't 1644 * reached track 0. Probably no drive. Raise an 1645 * error, as failing immediately might upset 1646 * computers possessed by the Devil :-) */ 1647 cont->error(); 1648 cont->redo(); 1649 return; 1650 case NEED_2_RECAL: 1651 debugt(__func__, "need 2 recal"); 1652 /* If we already did a recalibrate, 1653 * and we are not at track 0, this 1654 * means we have moved. (The only way 1655 * not to move at recalibration is to 1656 * be already at track 0.) Clear the 1657 * new change flag */ 1658 debug_dcl(DP->flags, 1659 "clearing NEWCHANGE flag because of second recalibrate\n"); 1660 1661 clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1662 DRS->select_date = jiffies; 1663 /* fall through */ 1664 default: 1665 debugt(__func__, "default"); 1666 /* Recalibrate moves the head by at 1667 * most 80 steps. If after one 1668 * recalibrate we don't have reached 1669 * track 0, this might mean that we 1670 * started beyond track 80. Try 1671 * again. */ 1672 DRS->track = NEED_1_RECAL; 1673 break; 1674 } 1675 } else 1676 DRS->track = ST1; 1677 floppy_ready(); 1678 } 1679 1680 static void print_result(char *message, int inr) 1681 { 1682 int i; 1683 1684 DPRINT("%s ", message); 1685 if (inr >= 0) 1686 for (i = 0; i < inr; i++) 1687 pr_cont("repl[%d]=%x ", i, reply_buffer[i]); 1688 pr_cont("\n"); 1689 } 1690 1691 /* interrupt handler. Note that this can be called externally on the Sparc */ 1692 irqreturn_t floppy_interrupt(int irq, void *dev_id) 1693 { 1694 int do_print; 1695 unsigned long f; 1696 void (*handler)(void) = do_floppy; 1697 1698 lasthandler = handler; 1699 interruptjiffies = jiffies; 1700 1701 f = claim_dma_lock(); 1702 fd_disable_dma(); 1703 release_dma_lock(f); 1704 1705 floppy_enable_hlt(); 1706 do_floppy = NULL; 1707 if (fdc >= N_FDC || FDCS->address == -1) { 1708 /* we don't even know which FDC is the culprit */ 1709 pr_info("DOR0=%x\n", fdc_state[0].dor); 1710 pr_info("floppy interrupt on bizarre fdc %d\n", fdc); 1711 pr_info("handler=%pf\n", handler); 1712 is_alive(__func__, "bizarre fdc"); 1713 return IRQ_NONE; 1714 } 1715 1716 FDCS->reset = 0; 1717 /* We have to clear the reset flag here, because apparently on boxes 1718 * with level triggered interrupts (PS/2, Sparc, ...), it is needed to 1719 * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the 1720 * emission of the SENSEI's. 1721 * It is OK to emit floppy commands because we are in an interrupt 1722 * handler here, and thus we have to fear no interference of other 1723 * activity. 1724 */ 1725 1726 do_print = !handler && print_unex && initialized; 1727 1728 inr = result(); 1729 if (do_print) 1730 print_result("unexpected interrupt", inr); 1731 if (inr == 0) { 1732 int max_sensei = 4; 1733 do { 1734 output_byte(FD_SENSEI); 1735 inr = result(); 1736 if (do_print) 1737 print_result("sensei", inr); 1738 max_sensei--; 1739 } while ((ST0 & 0x83) != UNIT(current_drive) && 1740 inr == 2 && max_sensei); 1741 } 1742 if (!handler) { 1743 FDCS->reset = 1; 1744 return IRQ_NONE; 1745 } 1746 schedule_bh(handler); 1747 is_alive(__func__, "normal interrupt end"); 1748 1749 /* FIXME! Was it really for us? */ 1750 return IRQ_HANDLED; 1751 } 1752 1753 static void recalibrate_floppy(void) 1754 { 1755 debugt(__func__, ""); 1756 do_floppy = recal_interrupt; 1757 output_byte(FD_RECALIBRATE); 1758 if (output_byte(UNIT(current_drive)) < 0) 1759 reset_fdc(); 1760 } 1761 1762 /* 1763 * Must do 4 FD_SENSEIs after reset because of ``drive polling''. 1764 */ 1765 static void reset_interrupt(void) 1766 { 1767 debugt(__func__, ""); 1768 result(); /* get the status ready for set_fdc */ 1769 if (FDCS->reset) { 1770 pr_info("reset set in interrupt, calling %pf\n", cont->error); 1771 cont->error(); /* a reset just after a reset. BAD! */ 1772 } 1773 cont->redo(); 1774 } 1775 1776 /* 1777 * reset is done by pulling bit 2 of DOR low for a while (old FDCs), 1778 * or by setting the self clearing bit 7 of STATUS (newer FDCs) 1779 */ 1780 static void reset_fdc(void) 1781 { 1782 unsigned long flags; 1783 1784 do_floppy = reset_interrupt; 1785 FDCS->reset = 0; 1786 reset_fdc_info(0); 1787 1788 /* Pseudo-DMA may intercept 'reset finished' interrupt. */ 1789 /* Irrelevant for systems with true DMA (i386). */ 1790 1791 flags = claim_dma_lock(); 1792 fd_disable_dma(); 1793 release_dma_lock(flags); 1794 1795 if (FDCS->version >= FDC_82072A) 1796 fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); 1797 else { 1798 fd_outb(FDCS->dor & ~0x04, FD_DOR); 1799 udelay(FD_RESET_DELAY); 1800 fd_outb(FDCS->dor, FD_DOR); 1801 } 1802 } 1803 1804 static void show_floppy(void) 1805 { 1806 int i; 1807 1808 pr_info("\n"); 1809 pr_info("floppy driver state\n"); 1810 pr_info("-------------------\n"); 1811 pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", 1812 jiffies, interruptjiffies, jiffies - interruptjiffies, 1813 lasthandler); 1814 1815 pr_info("timeout_message=%s\n", timeout_message); 1816 pr_info("last output bytes:\n"); 1817 for (i = 0; i < OLOGSIZE; i++) 1818 pr_info("%2x %2x %lu\n", 1819 output_log[(i + output_log_pos) % OLOGSIZE].data, 1820 output_log[(i + output_log_pos) % OLOGSIZE].status, 1821 output_log[(i + output_log_pos) % OLOGSIZE].jiffies); 1822 pr_info("last result at %lu\n", resultjiffies); 1823 pr_info("last redo_fd_request at %lu\n", lastredo); 1824 print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, 1825 reply_buffer, resultsize, true); 1826 1827 pr_info("status=%x\n", fd_inb(FD_STATUS)); 1828 pr_info("fdc_busy=%lu\n", fdc_busy); 1829 if (do_floppy) 1830 pr_info("do_floppy=%pf\n", do_floppy); 1831 if (work_pending(&floppy_work)) 1832 pr_info("floppy_work.func=%pf\n", floppy_work.func); 1833 if (timer_pending(&fd_timer)) 1834 pr_info("fd_timer.function=%pf\n", fd_timer.function); 1835 if (timer_pending(&fd_timeout)) { 1836 pr_info("timer_function=%pf\n", fd_timeout.function); 1837 pr_info("expires=%lu\n", fd_timeout.expires - jiffies); 1838 pr_info("now=%lu\n", jiffies); 1839 } 1840 pr_info("cont=%p\n", cont); 1841 pr_info("current_req=%p\n", current_req); 1842 pr_info("command_status=%d\n", command_status); 1843 pr_info("\n"); 1844 } 1845 1846 static void floppy_shutdown(unsigned long data) 1847 { 1848 unsigned long flags; 1849 1850 if (initialized) 1851 show_floppy(); 1852 cancel_activity(); 1853 1854 floppy_enable_hlt(); 1855 1856 flags = claim_dma_lock(); 1857 fd_disable_dma(); 1858 release_dma_lock(flags); 1859 1860 /* avoid dma going to a random drive after shutdown */ 1861 1862 if (initialized) 1863 DPRINT("floppy timeout called\n"); 1864 FDCS->reset = 1; 1865 if (cont) { 1866 cont->done(0); 1867 cont->redo(); /* this will recall reset when needed */ 1868 } else { 1869 pr_info("no cont in shutdown!\n"); 1870 process_fd_request(); 1871 } 1872 is_alive(__func__, ""); 1873 } 1874 1875 /* start motor, check media-changed condition and write protection */ 1876 static int start_motor(void (*function)(void)) 1877 { 1878 int mask; 1879 int data; 1880 1881 mask = 0xfc; 1882 data = UNIT(current_drive); 1883 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { 1884 if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { 1885 set_debugt(); 1886 /* no read since this drive is running */ 1887 DRS->first_read_date = 0; 1888 /* note motor start time if motor is not yet running */ 1889 DRS->spinup_date = jiffies; 1890 data |= (0x10 << UNIT(current_drive)); 1891 } 1892 } else if (FDCS->dor & (0x10 << UNIT(current_drive))) 1893 mask &= ~(0x10 << UNIT(current_drive)); 1894 1895 /* starts motor and selects floppy */ 1896 del_timer(motor_off_timer + current_drive); 1897 set_dor(fdc, mask, data); 1898 1899 /* wait_for_completion also schedules reset if needed. */ 1900 return fd_wait_for_completion(DRS->select_date + DP->select_delay, 1901 (timeout_fn)function); 1902 } 1903 1904 static void floppy_ready(void) 1905 { 1906 if (FDCS->reset) { 1907 reset_fdc(); 1908 return; 1909 } 1910 if (start_motor(floppy_ready)) 1911 return; 1912 if (fdc_dtr()) 1913 return; 1914 1915 debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); 1916 if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && 1917 disk_change(current_drive) && !DP->select_delay) 1918 twaddle(); /* this clears the dcl on certain 1919 * drive/controller combinations */ 1920 1921 #ifdef fd_chose_dma_mode 1922 if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { 1923 unsigned long flags = claim_dma_lock(); 1924 fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); 1925 release_dma_lock(flags); 1926 } 1927 #endif 1928 1929 if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { 1930 perpendicular_mode(); 1931 fdc_specify(); /* must be done here because of hut, hlt ... */ 1932 seek_floppy(); 1933 } else { 1934 if ((raw_cmd->flags & FD_RAW_READ) || 1935 (raw_cmd->flags & FD_RAW_WRITE)) 1936 fdc_specify(); 1937 setup_rw_floppy(); 1938 } 1939 } 1940 1941 static void floppy_start(void) 1942 { 1943 reschedule_timeout(current_reqD, "floppy start"); 1944 1945 scandrives(); 1946 debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); 1947 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 1948 floppy_ready(); 1949 } 1950 1951 /* 1952 * ======================================================================== 1953 * here ends the bottom half. Exported routines are: 1954 * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, 1955 * start_motor, reset_fdc, reset_fdc_info, interpret_errors. 1956 * Initialization also uses output_byte, result, set_dor, floppy_interrupt 1957 * and set_dor. 1958 * ======================================================================== 1959 */ 1960 /* 1961 * General purpose continuations. 1962 * ============================== 1963 */ 1964 1965 static void do_wakeup(void) 1966 { 1967 reschedule_timeout(MAXTIMEOUT, "do wakeup"); 1968 cont = NULL; 1969 command_status += 2; 1970 wake_up(&command_done); 1971 } 1972 1973 static const struct cont_t wakeup_cont = { 1974 .interrupt = empty, 1975 .redo = do_wakeup, 1976 .error = empty, 1977 .done = (done_f)empty 1978 }; 1979 1980 static const struct cont_t intr_cont = { 1981 .interrupt = empty, 1982 .redo = process_fd_request, 1983 .error = empty, 1984 .done = (done_f)empty 1985 }; 1986 1987 static int wait_til_done(void (*handler)(void), bool interruptible) 1988 { 1989 int ret; 1990 1991 schedule_bh(handler); 1992 1993 if (interruptible) 1994 wait_event_interruptible(command_done, command_status >= 2); 1995 else 1996 wait_event(command_done, command_status >= 2); 1997 1998 if (command_status < 2) { 1999 cancel_activity(); 2000 cont = &intr_cont; 2001 reset_fdc(); 2002 return -EINTR; 2003 } 2004 2005 if (FDCS->reset) 2006 command_status = FD_COMMAND_ERROR; 2007 if (command_status == FD_COMMAND_OKAY) 2008 ret = 0; 2009 else 2010 ret = -EIO; 2011 command_status = FD_COMMAND_NONE; 2012 return ret; 2013 } 2014 2015 static void generic_done(int result) 2016 { 2017 command_status = result; 2018 cont = &wakeup_cont; 2019 } 2020 2021 static void generic_success(void) 2022 { 2023 cont->done(1); 2024 } 2025 2026 static void generic_failure(void) 2027 { 2028 cont->done(0); 2029 } 2030 2031 static void success_and_wakeup(void) 2032 { 2033 generic_success(); 2034 cont->redo(); 2035 } 2036 2037 /* 2038 * formatting and rw support. 2039 * ========================== 2040 */ 2041 2042 static int next_valid_format(void) 2043 { 2044 int probed_format; 2045 2046 probed_format = DRS->probed_format; 2047 while (1) { 2048 if (probed_format >= 8 || !DP->autodetect[probed_format]) { 2049 DRS->probed_format = 0; 2050 return 1; 2051 } 2052 if (floppy_type[DP->autodetect[probed_format]].sect) { 2053 DRS->probed_format = probed_format; 2054 return 0; 2055 } 2056 probed_format++; 2057 } 2058 } 2059 2060 static void bad_flp_intr(void) 2061 { 2062 int err_count; 2063 2064 if (probing) { 2065 DRS->probed_format++; 2066 if (!next_valid_format()) 2067 return; 2068 } 2069 err_count = ++(*errors); 2070 INFBOUND(DRWE->badness, err_count); 2071 if (err_count > DP->max_errors.abort) 2072 cont->done(0); 2073 if (err_count > DP->max_errors.reset) 2074 FDCS->reset = 1; 2075 else if (err_count > DP->max_errors.recal) 2076 DRS->track = NEED_2_RECAL; 2077 } 2078 2079 static void set_floppy(int drive) 2080 { 2081 int type = ITYPE(UDRS->fd_device); 2082 2083 if (type) 2084 _floppy = floppy_type + type; 2085 else 2086 _floppy = current_type[drive]; 2087 } 2088 2089 /* 2090 * formatting support. 2091 * =================== 2092 */ 2093 static void format_interrupt(void) 2094 { 2095 switch (interpret_errors()) { 2096 case 1: 2097 cont->error(); 2098 case 2: 2099 break; 2100 case 0: 2101 cont->done(1); 2102 } 2103 cont->redo(); 2104 } 2105 2106 #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) 2107 #define CT(x) ((x) | 0xc0) 2108 2109 static void setup_format_params(int track) 2110 { 2111 int n; 2112 int il; 2113 int count; 2114 int head_shift; 2115 int track_shift; 2116 struct fparm { 2117 unsigned char track, head, sect, size; 2118 } *here = (struct fparm *)floppy_track_buffer; 2119 2120 raw_cmd = &default_raw_cmd; 2121 raw_cmd->track = track; 2122 2123 raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | 2124 FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); 2125 raw_cmd->rate = _floppy->rate & 0x43; 2126 raw_cmd->cmd_count = NR_F; 2127 COMMAND = FM_MODE(_floppy, FD_FORMAT); 2128 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); 2129 F_SIZECODE = FD_SIZECODE(_floppy); 2130 F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; 2131 F_GAP = _floppy->fmt_gap; 2132 F_FILL = FD_FILL_BYTE; 2133 2134 raw_cmd->kernel_data = floppy_track_buffer; 2135 raw_cmd->length = 4 * F_SECT_PER_TRACK; 2136 2137 /* allow for about 30ms for data transport per track */ 2138 head_shift = (F_SECT_PER_TRACK + 5) / 6; 2139 2140 /* a ``cylinder'' is two tracks plus a little stepping time */ 2141 track_shift = 2 * head_shift + 3; 2142 2143 /* position of logical sector 1 on this track */ 2144 n = (track_shift * format_req.track + head_shift * format_req.head) 2145 % F_SECT_PER_TRACK; 2146 2147 /* determine interleave */ 2148 il = 1; 2149 if (_floppy->fmt_gap < 0x22) 2150 il++; 2151 2152 /* initialize field */ 2153 for (count = 0; count < F_SECT_PER_TRACK; ++count) { 2154 here[count].track = format_req.track; 2155 here[count].head = format_req.head; 2156 here[count].sect = 0; 2157 here[count].size = F_SIZECODE; 2158 } 2159 /* place logical sectors */ 2160 for (count = 1; count <= F_SECT_PER_TRACK; ++count) { 2161 here[n].sect = count; 2162 n = (n + il) % F_SECT_PER_TRACK; 2163 if (here[n].sect) { /* sector busy, find next free sector */ 2164 ++n; 2165 if (n >= F_SECT_PER_TRACK) { 2166 n -= F_SECT_PER_TRACK; 2167 while (here[n].sect) 2168 ++n; 2169 } 2170 } 2171 } 2172 if (_floppy->stretch & FD_SECTBASEMASK) { 2173 for (count = 0; count < F_SECT_PER_TRACK; count++) 2174 here[count].sect += FD_SECTBASE(_floppy) - 1; 2175 } 2176 } 2177 2178 static void redo_format(void) 2179 { 2180 buffer_track = -1; 2181 setup_format_params(format_req.track << STRETCH(_floppy)); 2182 floppy_start(); 2183 debugt(__func__, "queue format request"); 2184 } 2185 2186 static const struct cont_t format_cont = { 2187 .interrupt = format_interrupt, 2188 .redo = redo_format, 2189 .error = bad_flp_intr, 2190 .done = generic_done 2191 }; 2192 2193 static int do_format(int drive, struct format_descr *tmp_format_req) 2194 { 2195 int ret; 2196 2197 if (lock_fdc(drive, true)) 2198 return -EINTR; 2199 2200 set_floppy(drive); 2201 if (!_floppy || 2202 _floppy->track > DP->tracks || 2203 tmp_format_req->track >= _floppy->track || 2204 tmp_format_req->head >= _floppy->head || 2205 (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || 2206 !_floppy->fmt_gap) { 2207 process_fd_request(); 2208 return -EINVAL; 2209 } 2210 format_req = *tmp_format_req; 2211 format_errors = 0; 2212 cont = &format_cont; 2213 errors = &format_errors; 2214 ret = wait_til_done(redo_format, true); 2215 if (ret == -EINTR) 2216 return -EINTR; 2217 process_fd_request(); 2218 return ret; 2219 } 2220 2221 /* 2222 * Buffer read/write and support 2223 * ============================= 2224 */ 2225 2226 static void floppy_end_request(struct request *req, int error) 2227 { 2228 unsigned int nr_sectors = current_count_sectors; 2229 unsigned int drive = (unsigned long)req->rq_disk->private_data; 2230 2231 /* current_count_sectors can be zero if transfer failed */ 2232 if (error) 2233 nr_sectors = blk_rq_cur_sectors(req); 2234 if (__blk_end_request(req, error, nr_sectors << 9)) 2235 return; 2236 2237 /* We're done with the request */ 2238 floppy_off(drive); 2239 current_req = NULL; 2240 } 2241 2242 /* new request_done. Can handle physical sectors which are smaller than a 2243 * logical buffer */ 2244 static void request_done(int uptodate) 2245 { 2246 struct request_queue *q = floppy_queue; 2247 struct request *req = current_req; 2248 unsigned long flags; 2249 int block; 2250 char msg[sizeof("request done ") + sizeof(int) * 3]; 2251 2252 probing = 0; 2253 snprintf(msg, sizeof(msg), "request done %d", uptodate); 2254 reschedule_timeout(MAXTIMEOUT, msg); 2255 2256 if (!req) { 2257 pr_info("floppy.c: no request in request_done\n"); 2258 return; 2259 } 2260 2261 if (uptodate) { 2262 /* maintain values for invalidation on geometry 2263 * change */ 2264 block = current_count_sectors + blk_rq_pos(req); 2265 INFBOUND(DRS->maxblock, block); 2266 if (block > _floppy->sect) 2267 DRS->maxtrack = 1; 2268 2269 /* unlock chained buffers */ 2270 spin_lock_irqsave(q->queue_lock, flags); 2271 floppy_end_request(req, 0); 2272 spin_unlock_irqrestore(q->queue_lock, flags); 2273 } else { 2274 if (rq_data_dir(req) == WRITE) { 2275 /* record write error information */ 2276 DRWE->write_errors++; 2277 if (DRWE->write_errors == 1) { 2278 DRWE->first_error_sector = blk_rq_pos(req); 2279 DRWE->first_error_generation = DRS->generation; 2280 } 2281 DRWE->last_error_sector = blk_rq_pos(req); 2282 DRWE->last_error_generation = DRS->generation; 2283 } 2284 spin_lock_irqsave(q->queue_lock, flags); 2285 floppy_end_request(req, -EIO); 2286 spin_unlock_irqrestore(q->queue_lock, flags); 2287 } 2288 } 2289 2290 /* Interrupt handler evaluating the result of the r/w operation */ 2291 static void rw_interrupt(void) 2292 { 2293 int eoc; 2294 int ssize; 2295 int heads; 2296 int nr_sectors; 2297 2298 if (R_HEAD >= 2) { 2299 /* some Toshiba floppy controllers occasionnally seem to 2300 * return bogus interrupts after read/write operations, which 2301 * can be recognized by a bad head number (>= 2) */ 2302 return; 2303 } 2304 2305 if (!DRS->first_read_date) 2306 DRS->first_read_date = jiffies; 2307 2308 nr_sectors = 0; 2309 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2310 2311 if (ST1 & ST1_EOC) 2312 eoc = 1; 2313 else 2314 eoc = 0; 2315 2316 if (COMMAND & 0x80) 2317 heads = 2; 2318 else 2319 heads = 1; 2320 2321 nr_sectors = (((R_TRACK - TRACK) * heads + 2322 R_HEAD - HEAD) * SECT_PER_TRACK + 2323 R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; 2324 2325 if (nr_sectors / ssize > 2326 DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { 2327 DPRINT("long rw: %x instead of %lx\n", 2328 nr_sectors, current_count_sectors); 2329 pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); 2330 pr_info("rh=%d h=%d\n", R_HEAD, HEAD); 2331 pr_info("rt=%d t=%d\n", R_TRACK, TRACK); 2332 pr_info("heads=%d eoc=%d\n", heads, eoc); 2333 pr_info("spt=%d st=%d ss=%d\n", 2334 SECT_PER_TRACK, fsector_t, ssize); 2335 pr_info("in_sector_offset=%d\n", in_sector_offset); 2336 } 2337 2338 nr_sectors -= in_sector_offset; 2339 INFBOUND(nr_sectors, 0); 2340 SUPBOUND(current_count_sectors, nr_sectors); 2341 2342 switch (interpret_errors()) { 2343 case 2: 2344 cont->redo(); 2345 return; 2346 case 1: 2347 if (!current_count_sectors) { 2348 cont->error(); 2349 cont->redo(); 2350 return; 2351 } 2352 break; 2353 case 0: 2354 if (!current_count_sectors) { 2355 cont->redo(); 2356 return; 2357 } 2358 current_type[current_drive] = _floppy; 2359 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2360 break; 2361 } 2362 2363 if (probing) { 2364 if (DP->flags & FTD_MSG) 2365 DPRINT("Auto-detected floppy type %s in fd%d\n", 2366 _floppy->name, current_drive); 2367 current_type[current_drive] = _floppy; 2368 floppy_sizes[TOMINOR(current_drive)] = _floppy->size; 2369 probing = 0; 2370 } 2371 2372 if (CT(COMMAND) != FD_READ || 2373 raw_cmd->kernel_data == current_req->buffer) { 2374 /* transfer directly from buffer */ 2375 cont->done(1); 2376 } else if (CT(COMMAND) == FD_READ) { 2377 buffer_track = raw_cmd->track; 2378 buffer_drive = current_drive; 2379 INFBOUND(buffer_max, nr_sectors + fsector_t); 2380 } 2381 cont->redo(); 2382 } 2383 2384 /* Compute maximal contiguous buffer size. */ 2385 static int buffer_chain_size(void) 2386 { 2387 struct bio_vec *bv; 2388 int size; 2389 struct req_iterator iter; 2390 char *base; 2391 2392 base = bio_data(current_req->bio); 2393 size = 0; 2394 2395 rq_for_each_segment(bv, current_req, iter) { 2396 if (page_address(bv->bv_page) + bv->bv_offset != base + size) 2397 break; 2398 2399 size += bv->bv_len; 2400 } 2401 2402 return size >> 9; 2403 } 2404 2405 /* Compute the maximal transfer size */ 2406 static int transfer_size(int ssize, int max_sector, int max_size) 2407 { 2408 SUPBOUND(max_sector, fsector_t + max_size); 2409 2410 /* alignment */ 2411 max_sector -= (max_sector % _floppy->sect) % ssize; 2412 2413 /* transfer size, beginning not aligned */ 2414 current_count_sectors = max_sector - fsector_t; 2415 2416 return max_sector; 2417 } 2418 2419 /* 2420 * Move data from/to the track buffer to/from the buffer cache. 2421 */ 2422 static void copy_buffer(int ssize, int max_sector, int max_sector_2) 2423 { 2424 int remaining; /* number of transferred 512-byte sectors */ 2425 struct bio_vec *bv; 2426 char *buffer; 2427 char *dma_buffer; 2428 int size; 2429 struct req_iterator iter; 2430 2431 max_sector = transfer_size(ssize, 2432 min(max_sector, max_sector_2), 2433 blk_rq_sectors(current_req)); 2434 2435 if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && 2436 buffer_max > fsector_t + blk_rq_sectors(current_req)) 2437 current_count_sectors = min_t(int, buffer_max - fsector_t, 2438 blk_rq_sectors(current_req)); 2439 2440 remaining = current_count_sectors << 9; 2441 if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { 2442 DPRINT("in copy buffer\n"); 2443 pr_info("current_count_sectors=%ld\n", current_count_sectors); 2444 pr_info("remaining=%d\n", remaining >> 9); 2445 pr_info("current_req->nr_sectors=%u\n", 2446 blk_rq_sectors(current_req)); 2447 pr_info("current_req->current_nr_sectors=%u\n", 2448 blk_rq_cur_sectors(current_req)); 2449 pr_info("max_sector=%d\n", max_sector); 2450 pr_info("ssize=%d\n", ssize); 2451 } 2452 2453 buffer_max = max(max_sector, buffer_max); 2454 2455 dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); 2456 2457 size = blk_rq_cur_bytes(current_req); 2458 2459 rq_for_each_segment(bv, current_req, iter) { 2460 if (!remaining) 2461 break; 2462 2463 size = bv->bv_len; 2464 SUPBOUND(size, remaining); 2465 2466 buffer = page_address(bv->bv_page) + bv->bv_offset; 2467 if (dma_buffer + size > 2468 floppy_track_buffer + (max_buffer_sectors << 10) || 2469 dma_buffer < floppy_track_buffer) { 2470 DPRINT("buffer overrun in copy buffer %d\n", 2471 (int)((floppy_track_buffer - dma_buffer) >> 9)); 2472 pr_info("fsector_t=%d buffer_min=%d\n", 2473 fsector_t, buffer_min); 2474 pr_info("current_count_sectors=%ld\n", 2475 current_count_sectors); 2476 if (CT(COMMAND) == FD_READ) 2477 pr_info("read\n"); 2478 if (CT(COMMAND) == FD_WRITE) 2479 pr_info("write\n"); 2480 break; 2481 } 2482 if (((unsigned long)buffer) % 512) 2483 DPRINT("%p buffer not aligned\n", buffer); 2484 2485 if (CT(COMMAND) == FD_READ) 2486 memcpy(buffer, dma_buffer, size); 2487 else 2488 memcpy(dma_buffer, buffer, size); 2489 2490 remaining -= size; 2491 dma_buffer += size; 2492 } 2493 if (remaining) { 2494 if (remaining > 0) 2495 max_sector -= remaining >> 9; 2496 DPRINT("weirdness: remaining %d\n", remaining >> 9); 2497 } 2498 } 2499 2500 /* work around a bug in pseudo DMA 2501 * (on some FDCs) pseudo DMA does not stop when the CPU stops 2502 * sending data. Hence we need a different way to signal the 2503 * transfer length: We use SECT_PER_TRACK. Unfortunately, this 2504 * does not work with MT, hence we can only transfer one head at 2505 * a time 2506 */ 2507 static void virtualdmabug_workaround(void) 2508 { 2509 int hard_sectors; 2510 int end_sector; 2511 2512 if (CT(COMMAND) == FD_WRITE) { 2513 COMMAND &= ~0x80; /* switch off multiple track mode */ 2514 2515 hard_sectors = raw_cmd->length >> (7 + SIZECODE); 2516 end_sector = SECTOR + hard_sectors - 1; 2517 if (end_sector > SECT_PER_TRACK) { 2518 pr_info("too many sectors %d > %d\n", 2519 end_sector, SECT_PER_TRACK); 2520 return; 2521 } 2522 SECT_PER_TRACK = end_sector; 2523 /* make sure SECT_PER_TRACK 2524 * points to end of transfer */ 2525 } 2526 } 2527 2528 /* 2529 * Formulate a read/write request. 2530 * this routine decides where to load the data (directly to buffer, or to 2531 * tmp floppy area), how much data to load (the size of the buffer, the whole 2532 * track, or a single sector) 2533 * All floppy_track_buffer handling goes in here. If we ever add track buffer 2534 * allocation on the fly, it should be done here. No other part should need 2535 * modification. 2536 */ 2537 2538 static int make_raw_rw_request(void) 2539 { 2540 int aligned_sector_t; 2541 int max_sector; 2542 int max_size; 2543 int tracksize; 2544 int ssize; 2545 2546 if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) 2547 return 0; 2548 2549 set_fdc((long)current_req->rq_disk->private_data); 2550 2551 raw_cmd = &default_raw_cmd; 2552 raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | 2553 FD_RAW_NEED_SEEK; 2554 raw_cmd->cmd_count = NR_RW; 2555 if (rq_data_dir(current_req) == READ) { 2556 raw_cmd->flags |= FD_RAW_READ; 2557 COMMAND = FM_MODE(_floppy, FD_READ); 2558 } else if (rq_data_dir(current_req) == WRITE) { 2559 raw_cmd->flags |= FD_RAW_WRITE; 2560 COMMAND = FM_MODE(_floppy, FD_WRITE); 2561 } else { 2562 DPRINT("%s: unknown command\n", __func__); 2563 return 0; 2564 } 2565 2566 max_sector = _floppy->sect * _floppy->head; 2567 2568 TRACK = (int)blk_rq_pos(current_req) / max_sector; 2569 fsector_t = (int)blk_rq_pos(current_req) % max_sector; 2570 if (_floppy->track && TRACK >= _floppy->track) { 2571 if (blk_rq_cur_sectors(current_req) & 1) { 2572 current_count_sectors = 1; 2573 return 1; 2574 } else 2575 return 0; 2576 } 2577 HEAD = fsector_t / _floppy->sect; 2578 2579 if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || 2580 test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && 2581 fsector_t < _floppy->sect) 2582 max_sector = _floppy->sect; 2583 2584 /* 2M disks have phantom sectors on the first track */ 2585 if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { 2586 max_sector = 2 * _floppy->sect / 3; 2587 if (fsector_t >= max_sector) { 2588 current_count_sectors = 2589 min_t(int, _floppy->sect - fsector_t, 2590 blk_rq_sectors(current_req)); 2591 return 1; 2592 } 2593 SIZECODE = 2; 2594 } else 2595 SIZECODE = FD_SIZECODE(_floppy); 2596 raw_cmd->rate = _floppy->rate & 0x43; 2597 if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) 2598 raw_cmd->rate = 1; 2599 2600 if (SIZECODE) 2601 SIZECODE2 = 0xff; 2602 else 2603 SIZECODE2 = 0x80; 2604 raw_cmd->track = TRACK << STRETCH(_floppy); 2605 DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); 2606 GAP = _floppy->gap; 2607 ssize = DIV_ROUND_UP(1 << SIZECODE, 4); 2608 SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; 2609 SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + 2610 FD_SECTBASE(_floppy); 2611 2612 /* tracksize describes the size which can be filled up with sectors 2613 * of size ssize. 2614 */ 2615 tracksize = _floppy->sect - _floppy->sect % ssize; 2616 if (tracksize < _floppy->sect) { 2617 SECT_PER_TRACK++; 2618 if (tracksize <= fsector_t % _floppy->sect) 2619 SECTOR--; 2620 2621 /* if we are beyond tracksize, fill up using smaller sectors */ 2622 while (tracksize <= fsector_t % _floppy->sect) { 2623 while (tracksize + ssize > _floppy->sect) { 2624 SIZECODE--; 2625 ssize >>= 1; 2626 } 2627 SECTOR++; 2628 SECT_PER_TRACK++; 2629 tracksize += ssize; 2630 } 2631 max_sector = HEAD * _floppy->sect + tracksize; 2632 } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { 2633 max_sector = _floppy->sect; 2634 } else if (!HEAD && CT(COMMAND) == FD_WRITE) { 2635 /* for virtual DMA bug workaround */ 2636 max_sector = _floppy->sect; 2637 } 2638 2639 in_sector_offset = (fsector_t % _floppy->sect) % ssize; 2640 aligned_sector_t = fsector_t - in_sector_offset; 2641 max_size = blk_rq_sectors(current_req); 2642 if ((raw_cmd->track == buffer_track) && 2643 (current_drive == buffer_drive) && 2644 (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { 2645 /* data already in track buffer */ 2646 if (CT(COMMAND) == FD_READ) { 2647 copy_buffer(1, max_sector, buffer_max); 2648 return 1; 2649 } 2650 } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { 2651 if (CT(COMMAND) == FD_WRITE) { 2652 unsigned int sectors; 2653 2654 sectors = fsector_t + blk_rq_sectors(current_req); 2655 if (sectors > ssize && sectors < ssize + ssize) 2656 max_size = ssize + ssize; 2657 else 2658 max_size = ssize; 2659 } 2660 raw_cmd->flags &= ~FD_RAW_WRITE; 2661 raw_cmd->flags |= FD_RAW_READ; 2662 COMMAND = FM_MODE(_floppy, FD_READ); 2663 } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { 2664 unsigned long dma_limit; 2665 int direct, indirect; 2666 2667 indirect = 2668 transfer_size(ssize, max_sector, 2669 max_buffer_sectors * 2) - fsector_t; 2670 2671 /* 2672 * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide 2673 * on a 64 bit machine! 2674 */ 2675 max_size = buffer_chain_size(); 2676 dma_limit = (MAX_DMA_ADDRESS - 2677 ((unsigned long)current_req->buffer)) >> 9; 2678 if ((unsigned long)max_size > dma_limit) 2679 max_size = dma_limit; 2680 /* 64 kb boundaries */ 2681 if (CROSS_64KB(current_req->buffer, max_size << 9)) 2682 max_size = (K_64 - 2683 ((unsigned long)current_req->buffer) % 2684 K_64) >> 9; 2685 direct = transfer_size(ssize, max_sector, max_size) - fsector_t; 2686 /* 2687 * We try to read tracks, but if we get too many errors, we 2688 * go back to reading just one sector at a time. 2689 * 2690 * This means we should be able to read a sector even if there 2691 * are other bad sectors on this track. 2692 */ 2693 if (!direct || 2694 (indirect * 2 > direct * 3 && 2695 *errors < DP->max_errors.read_track && 2696 ((!probing || 2697 (DP->read_track & (1 << DRS->probed_format)))))) { 2698 max_size = blk_rq_sectors(current_req); 2699 } else { 2700 raw_cmd->kernel_data = current_req->buffer; 2701 raw_cmd->length = current_count_sectors << 9; 2702 if (raw_cmd->length == 0) { 2703 DPRINT("%s: zero dma transfer attempted\n", __func__); 2704 DPRINT("indirect=%d direct=%d fsector_t=%d\n", 2705 indirect, direct, fsector_t); 2706 return 0; 2707 } 2708 virtualdmabug_workaround(); 2709 return 2; 2710 } 2711 } 2712 2713 if (CT(COMMAND) == FD_READ) 2714 max_size = max_sector; /* unbounded */ 2715 2716 /* claim buffer track if needed */ 2717 if (buffer_track != raw_cmd->track || /* bad track */ 2718 buffer_drive != current_drive || /* bad drive */ 2719 fsector_t > buffer_max || 2720 fsector_t < buffer_min || 2721 ((CT(COMMAND) == FD_READ || 2722 (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && 2723 max_sector > 2 * max_buffer_sectors + buffer_min && 2724 max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { 2725 /* not enough space */ 2726 buffer_track = -1; 2727 buffer_drive = current_drive; 2728 buffer_max = buffer_min = aligned_sector_t; 2729 } 2730 raw_cmd->kernel_data = floppy_track_buffer + 2731 ((aligned_sector_t - buffer_min) << 9); 2732 2733 if (CT(COMMAND) == FD_WRITE) { 2734 /* copy write buffer to track buffer. 2735 * if we get here, we know that the write 2736 * is either aligned or the data already in the buffer 2737 * (buffer will be overwritten) */ 2738 if (in_sector_offset && buffer_track == -1) 2739 DPRINT("internal error offset !=0 on write\n"); 2740 buffer_track = raw_cmd->track; 2741 buffer_drive = current_drive; 2742 copy_buffer(ssize, max_sector, 2743 2 * max_buffer_sectors + buffer_min); 2744 } else 2745 transfer_size(ssize, max_sector, 2746 2 * max_buffer_sectors + buffer_min - 2747 aligned_sector_t); 2748 2749 /* round up current_count_sectors to get dma xfer size */ 2750 raw_cmd->length = in_sector_offset + current_count_sectors; 2751 raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; 2752 raw_cmd->length <<= 9; 2753 if ((raw_cmd->length < current_count_sectors << 9) || 2754 (raw_cmd->kernel_data != current_req->buffer && 2755 CT(COMMAND) == FD_WRITE && 2756 (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || 2757 aligned_sector_t < buffer_min)) || 2758 raw_cmd->length % (128 << SIZECODE) || 2759 raw_cmd->length <= 0 || current_count_sectors <= 0) { 2760 DPRINT("fractionary current count b=%lx s=%lx\n", 2761 raw_cmd->length, current_count_sectors); 2762 if (raw_cmd->kernel_data != current_req->buffer) 2763 pr_info("addr=%d, length=%ld\n", 2764 (int)((raw_cmd->kernel_data - 2765 floppy_track_buffer) >> 9), 2766 current_count_sectors); 2767 pr_info("st=%d ast=%d mse=%d msi=%d\n", 2768 fsector_t, aligned_sector_t, max_sector, max_size); 2769 pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); 2770 pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", 2771 COMMAND, SECTOR, HEAD, TRACK); 2772 pr_info("buffer drive=%d\n", buffer_drive); 2773 pr_info("buffer track=%d\n", buffer_track); 2774 pr_info("buffer_min=%d\n", buffer_min); 2775 pr_info("buffer_max=%d\n", buffer_max); 2776 return 0; 2777 } 2778 2779 if (raw_cmd->kernel_data != current_req->buffer) { 2780 if (raw_cmd->kernel_data < floppy_track_buffer || 2781 current_count_sectors < 0 || 2782 raw_cmd->length < 0 || 2783 raw_cmd->kernel_data + raw_cmd->length > 2784 floppy_track_buffer + (max_buffer_sectors << 10)) { 2785 DPRINT("buffer overrun in schedule dma\n"); 2786 pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", 2787 fsector_t, buffer_min, raw_cmd->length >> 9); 2788 pr_info("current_count_sectors=%ld\n", 2789 current_count_sectors); 2790 if (CT(COMMAND) == FD_READ) 2791 pr_info("read\n"); 2792 if (CT(COMMAND) == FD_WRITE) 2793 pr_info("write\n"); 2794 return 0; 2795 } 2796 } else if (raw_cmd->length > blk_rq_bytes(current_req) || 2797 current_count_sectors > blk_rq_sectors(current_req)) { 2798 DPRINT("buffer overrun in direct transfer\n"); 2799 return 0; 2800 } else if (raw_cmd->length < current_count_sectors << 9) { 2801 DPRINT("more sectors than bytes\n"); 2802 pr_info("bytes=%ld\n", raw_cmd->length >> 9); 2803 pr_info("sectors=%ld\n", current_count_sectors); 2804 } 2805 if (raw_cmd->length == 0) { 2806 DPRINT("zero dma transfer attempted from make_raw_request\n"); 2807 return 0; 2808 } 2809 2810 virtualdmabug_workaround(); 2811 return 2; 2812 } 2813 2814 static void redo_fd_request(void) 2815 { 2816 int drive; 2817 int tmp; 2818 2819 lastredo = jiffies; 2820 if (current_drive < N_DRIVE) 2821 floppy_off(current_drive); 2822 2823 do_request: 2824 if (!current_req) { 2825 struct request *req; 2826 2827 spin_lock_irq(floppy_queue->queue_lock); 2828 req = blk_fetch_request(floppy_queue); 2829 spin_unlock_irq(floppy_queue->queue_lock); 2830 if (!req) { 2831 do_floppy = NULL; 2832 unlock_fdc(); 2833 return; 2834 } 2835 current_req = req; 2836 } 2837 drive = (long)current_req->rq_disk->private_data; 2838 set_fdc(drive); 2839 reschedule_timeout(current_reqD, "redo fd request"); 2840 2841 set_floppy(drive); 2842 raw_cmd = &default_raw_cmd; 2843 raw_cmd->flags = 0; 2844 if (start_motor(redo_fd_request)) 2845 return; 2846 2847 disk_change(current_drive); 2848 if (test_bit(current_drive, &fake_change) || 2849 test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { 2850 DPRINT("disk absent or changed during operation\n"); 2851 request_done(0); 2852 goto do_request; 2853 } 2854 if (!_floppy) { /* Autodetection */ 2855 if (!probing) { 2856 DRS->probed_format = 0; 2857 if (next_valid_format()) { 2858 DPRINT("no autodetectable formats\n"); 2859 _floppy = NULL; 2860 request_done(0); 2861 goto do_request; 2862 } 2863 } 2864 probing = 1; 2865 _floppy = floppy_type + DP->autodetect[DRS->probed_format]; 2866 } else 2867 probing = 0; 2868 errors = &(current_req->errors); 2869 tmp = make_raw_rw_request(); 2870 if (tmp < 2) { 2871 request_done(tmp); 2872 goto do_request; 2873 } 2874 2875 if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) 2876 twaddle(); 2877 schedule_bh(floppy_start); 2878 debugt(__func__, "queue fd request"); 2879 return; 2880 } 2881 2882 static const struct cont_t rw_cont = { 2883 .interrupt = rw_interrupt, 2884 .redo = redo_fd_request, 2885 .error = bad_flp_intr, 2886 .done = request_done 2887 }; 2888 2889 static void process_fd_request(void) 2890 { 2891 cont = &rw_cont; 2892 schedule_bh(redo_fd_request); 2893 } 2894 2895 static void do_fd_request(struct request_queue *q) 2896 { 2897 if (WARN(max_buffer_sectors == 0, 2898 "VFS: %s called on non-open device\n", __func__)) 2899 return; 2900 2901 if (WARN(atomic_read(&usage_count) == 0, 2902 "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n", 2903 current_req, (long)blk_rq_pos(current_req), current_req->cmd_type, 2904 current_req->cmd_flags)) 2905 return; 2906 2907 if (test_bit(0, &fdc_busy)) { 2908 /* fdc busy, this new request will be treated when the 2909 current one is done */ 2910 is_alive(__func__, "old request running"); 2911 return; 2912 } 2913 lock_fdc(MAXTIMEOUT, false); 2914 process_fd_request(); 2915 is_alive(__func__, ""); 2916 } 2917 2918 static const struct cont_t poll_cont = { 2919 .interrupt = success_and_wakeup, 2920 .redo = floppy_ready, 2921 .error = generic_failure, 2922 .done = generic_done 2923 }; 2924 2925 static int poll_drive(bool interruptible, int flag) 2926 { 2927 /* no auto-sense, just clear dcl */ 2928 raw_cmd = &default_raw_cmd; 2929 raw_cmd->flags = flag; 2930 raw_cmd->track = 0; 2931 raw_cmd->cmd_count = 0; 2932 cont = &poll_cont; 2933 debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); 2934 set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); 2935 2936 return wait_til_done(floppy_ready, interruptible); 2937 } 2938 2939 /* 2940 * User triggered reset 2941 * ==================== 2942 */ 2943 2944 static void reset_intr(void) 2945 { 2946 pr_info("weird, reset interrupt called\n"); 2947 } 2948 2949 static const struct cont_t reset_cont = { 2950 .interrupt = reset_intr, 2951 .redo = success_and_wakeup, 2952 .error = generic_failure, 2953 .done = generic_done 2954 }; 2955 2956 static int user_reset_fdc(int drive, int arg, bool interruptible) 2957 { 2958 int ret; 2959 2960 if (lock_fdc(drive, interruptible)) 2961 return -EINTR; 2962 2963 if (arg == FD_RESET_ALWAYS) 2964 FDCS->reset = 1; 2965 if (FDCS->reset) { 2966 cont = &reset_cont; 2967 ret = wait_til_done(reset_fdc, interruptible); 2968 if (ret == -EINTR) 2969 return -EINTR; 2970 } 2971 process_fd_request(); 2972 return 0; 2973 } 2974 2975 /* 2976 * Misc Ioctl's and support 2977 * ======================== 2978 */ 2979 static inline int fd_copyout(void __user *param, const void *address, 2980 unsigned long size) 2981 { 2982 return copy_to_user(param, address, size) ? -EFAULT : 0; 2983 } 2984 2985 static inline int fd_copyin(void __user *param, void *address, 2986 unsigned long size) 2987 { 2988 return copy_from_user(address, param, size) ? -EFAULT : 0; 2989 } 2990 2991 static const char *drive_name(int type, int drive) 2992 { 2993 struct floppy_struct *floppy; 2994 2995 if (type) 2996 floppy = floppy_type + type; 2997 else { 2998 if (UDP->native_format) 2999 floppy = floppy_type + UDP->native_format; 3000 else 3001 return "(null)"; 3002 } 3003 if (floppy->name) 3004 return floppy->name; 3005 else 3006 return "(null)"; 3007 } 3008 3009 /* raw commands */ 3010 static void raw_cmd_done(int flag) 3011 { 3012 int i; 3013 3014 if (!flag) { 3015 raw_cmd->flags |= FD_RAW_FAILURE; 3016 raw_cmd->flags |= FD_RAW_HARDFAILURE; 3017 } else { 3018 raw_cmd->reply_count = inr; 3019 if (raw_cmd->reply_count > MAX_REPLIES) 3020 raw_cmd->reply_count = 0; 3021 for (i = 0; i < raw_cmd->reply_count; i++) 3022 raw_cmd->reply[i] = reply_buffer[i]; 3023 3024 if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3025 unsigned long flags; 3026 flags = claim_dma_lock(); 3027 raw_cmd->length = fd_get_dma_residue(); 3028 release_dma_lock(flags); 3029 } 3030 3031 if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && 3032 (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) 3033 raw_cmd->flags |= FD_RAW_FAILURE; 3034 3035 if (disk_change(current_drive)) 3036 raw_cmd->flags |= FD_RAW_DISK_CHANGE; 3037 else 3038 raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; 3039 if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) 3040 motor_off_callback(current_drive); 3041 3042 if (raw_cmd->next && 3043 (!(raw_cmd->flags & FD_RAW_FAILURE) || 3044 !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && 3045 ((raw_cmd->flags & FD_RAW_FAILURE) || 3046 !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { 3047 raw_cmd = raw_cmd->next; 3048 return; 3049 } 3050 } 3051 generic_done(flag); 3052 } 3053 3054 static const struct cont_t raw_cmd_cont = { 3055 .interrupt = success_and_wakeup, 3056 .redo = floppy_start, 3057 .error = generic_failure, 3058 .done = raw_cmd_done 3059 }; 3060 3061 static int raw_cmd_copyout(int cmd, void __user *param, 3062 struct floppy_raw_cmd *ptr) 3063 { 3064 int ret; 3065 3066 while (ptr) { 3067 ret = copy_to_user(param, ptr, sizeof(*ptr)); 3068 if (ret) 3069 return -EFAULT; 3070 param += sizeof(struct floppy_raw_cmd); 3071 if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { 3072 if (ptr->length >= 0 && 3073 ptr->length <= ptr->buffer_length) { 3074 long length = ptr->buffer_length - ptr->length; 3075 ret = fd_copyout(ptr->data, ptr->kernel_data, 3076 length); 3077 if (ret) 3078 return ret; 3079 } 3080 } 3081 ptr = ptr->next; 3082 } 3083 3084 return 0; 3085 } 3086 3087 static void raw_cmd_free(struct floppy_raw_cmd **ptr) 3088 { 3089 struct floppy_raw_cmd *next; 3090 struct floppy_raw_cmd *this; 3091 3092 this = *ptr; 3093 *ptr = NULL; 3094 while (this) { 3095 if (this->buffer_length) { 3096 fd_dma_mem_free((unsigned long)this->kernel_data, 3097 this->buffer_length); 3098 this->buffer_length = 0; 3099 } 3100 next = this->next; 3101 kfree(this); 3102 this = next; 3103 } 3104 } 3105 3106 static int raw_cmd_copyin(int cmd, void __user *param, 3107 struct floppy_raw_cmd **rcmd) 3108 { 3109 struct floppy_raw_cmd *ptr; 3110 int ret; 3111 int i; 3112 3113 *rcmd = NULL; 3114 3115 loop: 3116 ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); 3117 if (!ptr) 3118 return -ENOMEM; 3119 *rcmd = ptr; 3120 ret = copy_from_user(ptr, param, sizeof(*ptr)); 3121 if (ret) 3122 return -EFAULT; 3123 ptr->next = NULL; 3124 ptr->buffer_length = 0; 3125 param += sizeof(struct floppy_raw_cmd); 3126 if (ptr->cmd_count > 33) 3127 /* the command may now also take up the space 3128 * initially intended for the reply & the 3129 * reply count. Needed for long 82078 commands 3130 * such as RESTORE, which takes ... 17 command 3131 * bytes. Murphy's law #137: When you reserve 3132 * 16 bytes for a structure, you'll one day 3133 * discover that you really need 17... 3134 */ 3135 return -EINVAL; 3136 3137 for (i = 0; i < 16; i++) 3138 ptr->reply[i] = 0; 3139 ptr->resultcode = 0; 3140 ptr->kernel_data = NULL; 3141 3142 if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { 3143 if (ptr->length <= 0) 3144 return -EINVAL; 3145 ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); 3146 fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); 3147 if (!ptr->kernel_data) 3148 return -ENOMEM; 3149 ptr->buffer_length = ptr->length; 3150 } 3151 if (ptr->flags & FD_RAW_WRITE) { 3152 ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); 3153 if (ret) 3154 return ret; 3155 } 3156 3157 if (ptr->flags & FD_RAW_MORE) { 3158 rcmd = &(ptr->next); 3159 ptr->rate &= 0x43; 3160 goto loop; 3161 } 3162 3163 return 0; 3164 } 3165 3166 static int raw_cmd_ioctl(int cmd, void __user *param) 3167 { 3168 struct floppy_raw_cmd *my_raw_cmd; 3169 int drive; 3170 int ret2; 3171 int ret; 3172 3173 if (FDCS->rawcmd <= 1) 3174 FDCS->rawcmd = 1; 3175 for (drive = 0; drive < N_DRIVE; drive++) { 3176 if (FDC(drive) != fdc) 3177 continue; 3178 if (drive == current_drive) { 3179 if (UDRS->fd_ref > 1) { 3180 FDCS->rawcmd = 2; 3181 break; 3182 } 3183 } else if (UDRS->fd_ref) { 3184 FDCS->rawcmd = 2; 3185 break; 3186 } 3187 } 3188 3189 if (FDCS->reset) 3190 return -EIO; 3191 3192 ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); 3193 if (ret) { 3194 raw_cmd_free(&my_raw_cmd); 3195 return ret; 3196 } 3197 3198 raw_cmd = my_raw_cmd; 3199 cont = &raw_cmd_cont; 3200 ret = wait_til_done(floppy_start, true); 3201 debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); 3202 3203 if (ret != -EINTR && FDCS->reset) 3204 ret = -EIO; 3205 3206 DRS->track = NO_TRACK; 3207 3208 ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); 3209 if (!ret) 3210 ret = ret2; 3211 raw_cmd_free(&my_raw_cmd); 3212 return ret; 3213 } 3214 3215 static int invalidate_drive(struct block_device *bdev) 3216 { 3217 /* invalidate the buffer track to force a reread */ 3218 set_bit((long)bdev->bd_disk->private_data, &fake_change); 3219 process_fd_request(); 3220 check_disk_change(bdev); 3221 return 0; 3222 } 3223 3224 static int set_geometry(unsigned int cmd, struct floppy_struct *g, 3225 int drive, int type, struct block_device *bdev) 3226 { 3227 int cnt; 3228 3229 /* sanity checking for parameters. */ 3230 if (g->sect <= 0 || 3231 g->head <= 0 || 3232 g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || 3233 /* check if reserved bits are set */ 3234 (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) 3235 return -EINVAL; 3236 if (type) { 3237 if (!capable(CAP_SYS_ADMIN)) 3238 return -EPERM; 3239 mutex_lock(&open_lock); 3240 if (lock_fdc(drive, true)) { 3241 mutex_unlock(&open_lock); 3242 return -EINTR; 3243 } 3244 floppy_type[type] = *g; 3245 floppy_type[type].name = "user format"; 3246 for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) 3247 floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = 3248 floppy_type[type].size + 1; 3249 process_fd_request(); 3250 for (cnt = 0; cnt < N_DRIVE; cnt++) { 3251 struct block_device *bdev = opened_bdev[cnt]; 3252 if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) 3253 continue; 3254 __invalidate_device(bdev); 3255 } 3256 mutex_unlock(&open_lock); 3257 } else { 3258 int oldStretch; 3259 3260 if (lock_fdc(drive, true)) 3261 return -EINTR; 3262 if (cmd != FDDEFPRM) { 3263 /* notice a disk change immediately, else 3264 * we lose our settings immediately*/ 3265 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3266 return -EINTR; 3267 } 3268 oldStretch = g->stretch; 3269 user_params[drive] = *g; 3270 if (buffer_drive == drive) 3271 SUPBOUND(buffer_max, user_params[drive].sect); 3272 current_type[drive] = &user_params[drive]; 3273 floppy_sizes[drive] = user_params[drive].size; 3274 if (cmd == FDDEFPRM) 3275 DRS->keep_data = -1; 3276 else 3277 DRS->keep_data = 1; 3278 /* invalidation. Invalidate only when needed, i.e. 3279 * when there are already sectors in the buffer cache 3280 * whose number will change. This is useful, because 3281 * mtools often changes the geometry of the disk after 3282 * looking at the boot block */ 3283 if (DRS->maxblock > user_params[drive].sect || 3284 DRS->maxtrack || 3285 ((user_params[drive].sect ^ oldStretch) & 3286 (FD_SWAPSIDES | FD_SECTBASEMASK))) 3287 invalidate_drive(bdev); 3288 else 3289 process_fd_request(); 3290 } 3291 return 0; 3292 } 3293 3294 /* handle obsolete ioctl's */ 3295 static unsigned int ioctl_table[] = { 3296 FDCLRPRM, 3297 FDSETPRM, 3298 FDDEFPRM, 3299 FDGETPRM, 3300 FDMSGON, 3301 FDMSGOFF, 3302 FDFMTBEG, 3303 FDFMTTRK, 3304 FDFMTEND, 3305 FDSETEMSGTRESH, 3306 FDFLUSH, 3307 FDSETMAXERRS, 3308 FDGETMAXERRS, 3309 FDGETDRVTYP, 3310 FDSETDRVPRM, 3311 FDGETDRVPRM, 3312 FDGETDRVSTAT, 3313 FDPOLLDRVSTAT, 3314 FDRESET, 3315 FDGETFDCSTAT, 3316 FDWERRORCLR, 3317 FDWERRORGET, 3318 FDRAWCMD, 3319 FDEJECT, 3320 FDTWADDLE 3321 }; 3322 3323 static int normalize_ioctl(unsigned int *cmd, int *size) 3324 { 3325 int i; 3326 3327 for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { 3328 if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { 3329 *size = _IOC_SIZE(*cmd); 3330 *cmd = ioctl_table[i]; 3331 if (*size > _IOC_SIZE(*cmd)) { 3332 pr_info("ioctl not yet supported\n"); 3333 return -EFAULT; 3334 } 3335 return 0; 3336 } 3337 } 3338 return -EINVAL; 3339 } 3340 3341 static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) 3342 { 3343 if (type) 3344 *g = &floppy_type[type]; 3345 else { 3346 if (lock_fdc(drive, false)) 3347 return -EINTR; 3348 if (poll_drive(false, 0) == -EINTR) 3349 return -EINTR; 3350 process_fd_request(); 3351 *g = current_type[drive]; 3352 } 3353 if (!*g) 3354 return -ENODEV; 3355 return 0; 3356 } 3357 3358 static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) 3359 { 3360 int drive = (long)bdev->bd_disk->private_data; 3361 int type = ITYPE(drive_state[drive].fd_device); 3362 struct floppy_struct *g; 3363 int ret; 3364 3365 ret = get_floppy_geometry(drive, type, &g); 3366 if (ret) 3367 return ret; 3368 3369 geo->heads = g->head; 3370 geo->sectors = g->sect; 3371 geo->cylinders = g->track; 3372 return 0; 3373 } 3374 3375 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, 3376 unsigned long param) 3377 { 3378 int drive = (long)bdev->bd_disk->private_data; 3379 int type = ITYPE(UDRS->fd_device); 3380 int i; 3381 int ret; 3382 int size; 3383 union inparam { 3384 struct floppy_struct g; /* geometry */ 3385 struct format_descr f; 3386 struct floppy_max_errors max_errors; 3387 struct floppy_drive_params dp; 3388 } inparam; /* parameters coming from user space */ 3389 const void *outparam; /* parameters passed back to user space */ 3390 3391 /* convert compatibility eject ioctls into floppy eject ioctl. 3392 * We do this in order to provide a means to eject floppy disks before 3393 * installing the new fdutils package */ 3394 if (cmd == CDROMEJECT || /* CD-ROM eject */ 3395 cmd == 0x6470) { /* SunOS floppy eject */ 3396 DPRINT("obsolete eject ioctl\n"); 3397 DPRINT("please use floppycontrol --eject\n"); 3398 cmd = FDEJECT; 3399 } 3400 3401 if (!((cmd & 0xff00) == 0x0200)) 3402 return -EINVAL; 3403 3404 /* convert the old style command into a new style command */ 3405 ret = normalize_ioctl(&cmd, &size); 3406 if (ret) 3407 return ret; 3408 3409 /* permission checks */ 3410 if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || 3411 ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) 3412 return -EPERM; 3413 3414 if (WARN_ON(size < 0 || size > sizeof(inparam))) 3415 return -EINVAL; 3416 3417 /* copyin */ 3418 memset(&inparam, 0, sizeof(inparam)); 3419 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3420 ret = fd_copyin((void __user *)param, &inparam, size); 3421 if (ret) 3422 return ret; 3423 } 3424 3425 switch (cmd) { 3426 case FDEJECT: 3427 if (UDRS->fd_ref != 1) 3428 /* somebody else has this drive open */ 3429 return -EBUSY; 3430 if (lock_fdc(drive, true)) 3431 return -EINTR; 3432 3433 /* do the actual eject. Fails on 3434 * non-Sparc architectures */ 3435 ret = fd_eject(UNIT(drive)); 3436 3437 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3438 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3439 process_fd_request(); 3440 return ret; 3441 case FDCLRPRM: 3442 if (lock_fdc(drive, true)) 3443 return -EINTR; 3444 current_type[drive] = NULL; 3445 floppy_sizes[drive] = MAX_DISK_SIZE << 1; 3446 UDRS->keep_data = 0; 3447 return invalidate_drive(bdev); 3448 case FDSETPRM: 3449 case FDDEFPRM: 3450 return set_geometry(cmd, &inparam.g, drive, type, bdev); 3451 case FDGETPRM: 3452 ret = get_floppy_geometry(drive, type, 3453 (struct floppy_struct **)&outparam); 3454 if (ret) 3455 return ret; 3456 break; 3457 case FDMSGON: 3458 UDP->flags |= FTD_MSG; 3459 return 0; 3460 case FDMSGOFF: 3461 UDP->flags &= ~FTD_MSG; 3462 return 0; 3463 case FDFMTBEG: 3464 if (lock_fdc(drive, true)) 3465 return -EINTR; 3466 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3467 return -EINTR; 3468 ret = UDRS->flags; 3469 process_fd_request(); 3470 if (ret & FD_VERIFY) 3471 return -ENODEV; 3472 if (!(ret & FD_DISK_WRITABLE)) 3473 return -EROFS; 3474 return 0; 3475 case FDFMTTRK: 3476 if (UDRS->fd_ref != 1) 3477 return -EBUSY; 3478 return do_format(drive, &inparam.f); 3479 case FDFMTEND: 3480 case FDFLUSH: 3481 if (lock_fdc(drive, true)) 3482 return -EINTR; 3483 return invalidate_drive(bdev); 3484 case FDSETEMSGTRESH: 3485 UDP->max_errors.reporting = (unsigned short)(param & 0x0f); 3486 return 0; 3487 case FDGETMAXERRS: 3488 outparam = &UDP->max_errors; 3489 break; 3490 case FDSETMAXERRS: 3491 UDP->max_errors = inparam.max_errors; 3492 break; 3493 case FDGETDRVTYP: 3494 outparam = drive_name(type, drive); 3495 SUPBOUND(size, strlen((const char *)outparam) + 1); 3496 break; 3497 case FDSETDRVPRM: 3498 *UDP = inparam.dp; 3499 break; 3500 case FDGETDRVPRM: 3501 outparam = UDP; 3502 break; 3503 case FDPOLLDRVSTAT: 3504 if (lock_fdc(drive, true)) 3505 return -EINTR; 3506 if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) 3507 return -EINTR; 3508 process_fd_request(); 3509 /* fall through */ 3510 case FDGETDRVSTAT: 3511 outparam = UDRS; 3512 break; 3513 case FDRESET: 3514 return user_reset_fdc(drive, (int)param, true); 3515 case FDGETFDCSTAT: 3516 outparam = UFDCS; 3517 break; 3518 case FDWERRORCLR: 3519 memset(UDRWE, 0, sizeof(*UDRWE)); 3520 return 0; 3521 case FDWERRORGET: 3522 outparam = UDRWE; 3523 break; 3524 case FDRAWCMD: 3525 if (type) 3526 return -EINVAL; 3527 if (lock_fdc(drive, true)) 3528 return -EINTR; 3529 set_floppy(drive); 3530 i = raw_cmd_ioctl(cmd, (void __user *)param); 3531 if (i == -EINTR) 3532 return -EINTR; 3533 process_fd_request(); 3534 return i; 3535 case FDTWADDLE: 3536 if (lock_fdc(drive, true)) 3537 return -EINTR; 3538 twaddle(); 3539 process_fd_request(); 3540 return 0; 3541 default: 3542 return -EINVAL; 3543 } 3544 3545 if (_IOC_DIR(cmd) & _IOC_READ) 3546 return fd_copyout((void __user *)param, outparam, size); 3547 3548 return 0; 3549 } 3550 3551 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 3552 unsigned int cmd, unsigned long param) 3553 { 3554 int ret; 3555 3556 lock_kernel(); 3557 ret = fd_locked_ioctl(bdev, mode, cmd, param); 3558 unlock_kernel(); 3559 3560 return ret; 3561 } 3562 3563 static void __init config_types(void) 3564 { 3565 bool has_drive = false; 3566 int drive; 3567 3568 /* read drive info out of physical CMOS */ 3569 drive = 0; 3570 if (!UDP->cmos) 3571 UDP->cmos = FLOPPY0_TYPE; 3572 drive = 1; 3573 if (!UDP->cmos && FLOPPY1_TYPE) 3574 UDP->cmos = FLOPPY1_TYPE; 3575 3576 /* FIXME: additional physical CMOS drive detection should go here */ 3577 3578 for (drive = 0; drive < N_DRIVE; drive++) { 3579 unsigned int type = UDP->cmos; 3580 struct floppy_drive_params *params; 3581 const char *name = NULL; 3582 static char temparea[32]; 3583 3584 if (type < ARRAY_SIZE(default_drive_params)) { 3585 params = &default_drive_params[type].params; 3586 if (type) { 3587 name = default_drive_params[type].name; 3588 allowed_drive_mask |= 1 << drive; 3589 } else 3590 allowed_drive_mask &= ~(1 << drive); 3591 } else { 3592 params = &default_drive_params[0].params; 3593 sprintf(temparea, "unknown type %d (usb?)", type); 3594 name = temparea; 3595 } 3596 if (name) { 3597 const char *prepend; 3598 if (!has_drive) { 3599 prepend = ""; 3600 has_drive = true; 3601 pr_info("Floppy drive(s):"); 3602 } else { 3603 prepend = ","; 3604 } 3605 3606 pr_cont("%s fd%d is %s", prepend, drive, name); 3607 } 3608 *UDP = *params; 3609 } 3610 3611 if (has_drive) 3612 pr_cont("\n"); 3613 } 3614 3615 static int floppy_release(struct gendisk *disk, fmode_t mode) 3616 { 3617 int drive = (long)disk->private_data; 3618 3619 lock_kernel(); 3620 mutex_lock(&open_lock); 3621 if (UDRS->fd_ref < 0) 3622 UDRS->fd_ref = 0; 3623 else if (!UDRS->fd_ref--) { 3624 DPRINT("floppy_release with fd_ref == 0"); 3625 UDRS->fd_ref = 0; 3626 } 3627 if (!UDRS->fd_ref) 3628 opened_bdev[drive] = NULL; 3629 mutex_unlock(&open_lock); 3630 unlock_kernel(); 3631 3632 return 0; 3633 } 3634 3635 /* 3636 * floppy_open check for aliasing (/dev/fd0 can be the same as 3637 * /dev/PS0 etc), and disallows simultaneous access to the same 3638 * drive with different device numbers. 3639 */ 3640 static int floppy_open(struct block_device *bdev, fmode_t mode) 3641 { 3642 int drive = (long)bdev->bd_disk->private_data; 3643 int old_dev, new_dev; 3644 int try; 3645 int res = -EBUSY; 3646 char *tmp; 3647 3648 lock_kernel(); 3649 mutex_lock(&open_lock); 3650 old_dev = UDRS->fd_device; 3651 if (opened_bdev[drive] && opened_bdev[drive] != bdev) 3652 goto out2; 3653 3654 if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { 3655 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3656 set_bit(FD_VERIFY_BIT, &UDRS->flags); 3657 } 3658 3659 if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL))) 3660 goto out2; 3661 3662 if (mode & FMODE_EXCL) 3663 UDRS->fd_ref = -1; 3664 else 3665 UDRS->fd_ref++; 3666 3667 opened_bdev[drive] = bdev; 3668 3669 res = -ENXIO; 3670 3671 if (!floppy_track_buffer) { 3672 /* if opening an ED drive, reserve a big buffer, 3673 * else reserve a small one */ 3674 if ((UDP->cmos == 6) || (UDP->cmos == 5)) 3675 try = 64; /* Only 48 actually useful */ 3676 else 3677 try = 32; /* Only 24 actually useful */ 3678 3679 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3680 if (!tmp && !floppy_track_buffer) { 3681 try >>= 1; /* buffer only one side */ 3682 INFBOUND(try, 16); 3683 tmp = (char *)fd_dma_mem_alloc(1024 * try); 3684 } 3685 if (!tmp && !floppy_track_buffer) 3686 fallback_on_nodma_alloc(&tmp, 2048 * try); 3687 if (!tmp && !floppy_track_buffer) { 3688 DPRINT("Unable to allocate DMA memory\n"); 3689 goto out; 3690 } 3691 if (floppy_track_buffer) { 3692 if (tmp) 3693 fd_dma_mem_free((unsigned long)tmp, try * 1024); 3694 } else { 3695 buffer_min = buffer_max = -1; 3696 floppy_track_buffer = tmp; 3697 max_buffer_sectors = try; 3698 } 3699 } 3700 3701 new_dev = MINOR(bdev->bd_dev); 3702 UDRS->fd_device = new_dev; 3703 set_capacity(disks[drive], floppy_sizes[new_dev]); 3704 if (old_dev != -1 && old_dev != new_dev) { 3705 if (buffer_drive == drive) 3706 buffer_track = -1; 3707 } 3708 3709 if (UFDCS->rawcmd == 1) 3710 UFDCS->rawcmd = 2; 3711 3712 if (!(mode & FMODE_NDELAY)) { 3713 if (mode & (FMODE_READ|FMODE_WRITE)) { 3714 UDRS->last_checked = 0; 3715 check_disk_change(bdev); 3716 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) 3717 goto out; 3718 } 3719 res = -EROFS; 3720 if ((mode & FMODE_WRITE) && 3721 !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) 3722 goto out; 3723 } 3724 mutex_unlock(&open_lock); 3725 unlock_kernel(); 3726 return 0; 3727 out: 3728 if (UDRS->fd_ref < 0) 3729 UDRS->fd_ref = 0; 3730 else 3731 UDRS->fd_ref--; 3732 if (!UDRS->fd_ref) 3733 opened_bdev[drive] = NULL; 3734 out2: 3735 mutex_unlock(&open_lock); 3736 unlock_kernel(); 3737 return res; 3738 } 3739 3740 /* 3741 * Check if the disk has been changed or if a change has been faked. 3742 */ 3743 static int check_floppy_change(struct gendisk *disk) 3744 { 3745 int drive = (long)disk->private_data; 3746 3747 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3748 test_bit(FD_VERIFY_BIT, &UDRS->flags)) 3749 return 1; 3750 3751 if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { 3752 lock_fdc(drive, false); 3753 poll_drive(false, 0); 3754 process_fd_request(); 3755 } 3756 3757 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3758 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3759 test_bit(drive, &fake_change) || 3760 (!ITYPE(UDRS->fd_device) && !current_type[drive])) 3761 return 1; 3762 return 0; 3763 } 3764 3765 /* 3766 * This implements "read block 0" for floppy_revalidate(). 3767 * Needed for format autodetection, checking whether there is 3768 * a disk in the drive, and whether that disk is writable. 3769 */ 3770 3771 static void floppy_rb0_complete(struct bio *bio, int err) 3772 { 3773 complete((struct completion *)bio->bi_private); 3774 } 3775 3776 static int __floppy_read_block_0(struct block_device *bdev) 3777 { 3778 struct bio bio; 3779 struct bio_vec bio_vec; 3780 struct completion complete; 3781 struct page *page; 3782 size_t size; 3783 3784 page = alloc_page(GFP_NOIO); 3785 if (!page) { 3786 process_fd_request(); 3787 return -ENOMEM; 3788 } 3789 3790 size = bdev->bd_block_size; 3791 if (!size) 3792 size = 1024; 3793 3794 bio_init(&bio); 3795 bio.bi_io_vec = &bio_vec; 3796 bio_vec.bv_page = page; 3797 bio_vec.bv_len = size; 3798 bio_vec.bv_offset = 0; 3799 bio.bi_vcnt = 1; 3800 bio.bi_idx = 0; 3801 bio.bi_size = size; 3802 bio.bi_bdev = bdev; 3803 bio.bi_sector = 0; 3804 bio.bi_flags = BIO_QUIET; 3805 init_completion(&complete); 3806 bio.bi_private = &complete; 3807 bio.bi_end_io = floppy_rb0_complete; 3808 3809 submit_bio(READ, &bio); 3810 generic_unplug_device(bdev_get_queue(bdev)); 3811 process_fd_request(); 3812 wait_for_completion(&complete); 3813 3814 __free_page(page); 3815 3816 return 0; 3817 } 3818 3819 /* revalidate the floppy disk, i.e. trigger format autodetection by reading 3820 * the bootblock (block 0). "Autodetection" is also needed to check whether 3821 * there is a disk in the drive at all... Thus we also do it for fixed 3822 * geometry formats */ 3823 static int floppy_revalidate(struct gendisk *disk) 3824 { 3825 int drive = (long)disk->private_data; 3826 #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device)) 3827 int cf; 3828 int res = 0; 3829 3830 if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3831 test_bit(FD_VERIFY_BIT, &UDRS->flags) || 3832 test_bit(drive, &fake_change) || NO_GEOM) { 3833 if (WARN(atomic_read(&usage_count) == 0, 3834 "VFS: revalidate called on non-open device.\n")) 3835 return -EFAULT; 3836 3837 lock_fdc(drive, false); 3838 cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || 3839 test_bit(FD_VERIFY_BIT, &UDRS->flags)); 3840 if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) { 3841 process_fd_request(); /*already done by another thread */ 3842 return 0; 3843 } 3844 UDRS->maxblock = 0; 3845 UDRS->maxtrack = 0; 3846 if (buffer_drive == drive) 3847 buffer_track = -1; 3848 clear_bit(drive, &fake_change); 3849 clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 3850 if (cf) 3851 UDRS->generation++; 3852 if (NO_GEOM) { 3853 /* auto-sensing */ 3854 res = __floppy_read_block_0(opened_bdev[drive]); 3855 } else { 3856 if (cf) 3857 poll_drive(false, FD_RAW_NEED_DISK); 3858 process_fd_request(); 3859 } 3860 } 3861 set_capacity(disk, floppy_sizes[UDRS->fd_device]); 3862 return res; 3863 } 3864 3865 static const struct block_device_operations floppy_fops = { 3866 .owner = THIS_MODULE, 3867 .open = floppy_open, 3868 .release = floppy_release, 3869 .ioctl = fd_ioctl, 3870 .getgeo = fd_getgeo, 3871 .media_changed = check_floppy_change, 3872 .revalidate_disk = floppy_revalidate, 3873 }; 3874 3875 /* 3876 * Floppy Driver initialization 3877 * ============================= 3878 */ 3879 3880 /* Determine the floppy disk controller type */ 3881 /* This routine was written by David C. Niemi */ 3882 static char __init get_fdc_version(void) 3883 { 3884 int r; 3885 3886 output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ 3887 if (FDCS->reset) 3888 return FDC_NONE; 3889 r = result(); 3890 if (r <= 0x00) 3891 return FDC_NONE; /* No FDC present ??? */ 3892 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3893 pr_info("FDC %d is an 8272A\n", fdc); 3894 return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ 3895 } 3896 if (r != 10) { 3897 pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", 3898 fdc, r); 3899 return FDC_UNKNOWN; 3900 } 3901 3902 if (!fdc_configure()) { 3903 pr_info("FDC %d is an 82072\n", fdc); 3904 return FDC_82072; /* 82072 doesn't know CONFIGURE */ 3905 } 3906 3907 output_byte(FD_PERPENDICULAR); 3908 if (need_more_output() == MORE_OUTPUT) { 3909 output_byte(0); 3910 } else { 3911 pr_info("FDC %d is an 82072A\n", fdc); 3912 return FDC_82072A; /* 82072A as found on Sparcs. */ 3913 } 3914 3915 output_byte(FD_UNLOCK); 3916 r = result(); 3917 if ((r == 1) && (reply_buffer[0] == 0x80)) { 3918 pr_info("FDC %d is a pre-1991 82077\n", fdc); 3919 return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know 3920 * LOCK/UNLOCK */ 3921 } 3922 if ((r != 1) || (reply_buffer[0] != 0x00)) { 3923 pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", 3924 fdc, r); 3925 return FDC_UNKNOWN; 3926 } 3927 output_byte(FD_PARTID); 3928 r = result(); 3929 if (r != 1) { 3930 pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", 3931 fdc, r); 3932 return FDC_UNKNOWN; 3933 } 3934 if (reply_buffer[0] == 0x80) { 3935 pr_info("FDC %d is a post-1991 82077\n", fdc); 3936 return FDC_82077; /* Revised 82077AA passes all the tests */ 3937 } 3938 switch (reply_buffer[0] >> 5) { 3939 case 0x0: 3940 /* Either a 82078-1 or a 82078SL running at 5Volt */ 3941 pr_info("FDC %d is an 82078.\n", fdc); 3942 return FDC_82078; 3943 case 0x1: 3944 pr_info("FDC %d is a 44pin 82078\n", fdc); 3945 return FDC_82078; 3946 case 0x2: 3947 pr_info("FDC %d is a S82078B\n", fdc); 3948 return FDC_S82078B; 3949 case 0x3: 3950 pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); 3951 return FDC_87306; 3952 default: 3953 pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", 3954 fdc, reply_buffer[0] >> 5); 3955 return FDC_82078_UNKN; 3956 } 3957 } /* get_fdc_version */ 3958 3959 /* lilo configuration */ 3960 3961 static void __init floppy_set_flags(int *ints, int param, int param2) 3962 { 3963 int i; 3964 3965 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3966 if (param) 3967 default_drive_params[i].params.flags |= param2; 3968 else 3969 default_drive_params[i].params.flags &= ~param2; 3970 } 3971 DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); 3972 } 3973 3974 static void __init daring(int *ints, int param, int param2) 3975 { 3976 int i; 3977 3978 for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { 3979 if (param) { 3980 default_drive_params[i].params.select_delay = 0; 3981 default_drive_params[i].params.flags |= 3982 FD_SILENT_DCL_CLEAR; 3983 } else { 3984 default_drive_params[i].params.select_delay = 3985 2 * HZ / 100; 3986 default_drive_params[i].params.flags &= 3987 ~FD_SILENT_DCL_CLEAR; 3988 } 3989 } 3990 DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); 3991 } 3992 3993 static void __init set_cmos(int *ints, int dummy, int dummy2) 3994 { 3995 int current_drive = 0; 3996 3997 if (ints[0] != 2) { 3998 DPRINT("wrong number of parameters for CMOS\n"); 3999 return; 4000 } 4001 current_drive = ints[1]; 4002 if (current_drive < 0 || current_drive >= 8) { 4003 DPRINT("bad drive for set_cmos\n"); 4004 return; 4005 } 4006 #if N_FDC > 1 4007 if (current_drive >= 4 && !FDC2) 4008 FDC2 = 0x370; 4009 #endif 4010 DP->cmos = ints[2]; 4011 DPRINT("setting CMOS code to %d\n", ints[2]); 4012 } 4013 4014 static struct param_table { 4015 const char *name; 4016 void (*fn) (int *ints, int param, int param2); 4017 int *var; 4018 int def_param; 4019 int param2; 4020 } config_params[] __initdata = { 4021 {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4022 {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ 4023 {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, 4024 {"irq", NULL, &FLOPPY_IRQ, 6, 0}, 4025 {"dma", NULL, &FLOPPY_DMA, 2, 0}, 4026 {"daring", daring, NULL, 1, 0}, 4027 #if N_FDC > 1 4028 {"two_fdc", NULL, &FDC2, 0x370, 0}, 4029 {"one_fdc", NULL, &FDC2, 0, 0}, 4030 #endif 4031 {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, 4032 {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, 4033 {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, 4034 {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, 4035 {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, 4036 {"nodma", NULL, &can_use_virtual_dma, 1, 0}, 4037 {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, 4038 {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, 4039 {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, 4040 {"nofifo", NULL, &no_fifo, 0x20, 0}, 4041 {"usefifo", NULL, &no_fifo, 0, 0}, 4042 {"cmos", set_cmos, NULL, 0, 0}, 4043 {"slow", NULL, &slow_floppy, 1, 0}, 4044 {"unexpected_interrupts", NULL, &print_unex, 1, 0}, 4045 {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, 4046 {"L40SX", NULL, &print_unex, 0, 0} 4047 4048 EXTRA_FLOPPY_PARAMS 4049 }; 4050 4051 static int __init floppy_setup(char *str) 4052 { 4053 int i; 4054 int param; 4055 int ints[11]; 4056 4057 str = get_options(str, ARRAY_SIZE(ints), ints); 4058 if (str) { 4059 for (i = 0; i < ARRAY_SIZE(config_params); i++) { 4060 if (strcmp(str, config_params[i].name) == 0) { 4061 if (ints[0]) 4062 param = ints[1]; 4063 else 4064 param = config_params[i].def_param; 4065 if (config_params[i].fn) 4066 config_params[i].fn(ints, param, 4067 config_params[i]. 4068 param2); 4069 if (config_params[i].var) { 4070 DPRINT("%s=%d\n", str, param); 4071 *config_params[i].var = param; 4072 } 4073 return 1; 4074 } 4075 } 4076 } 4077 if (str) { 4078 DPRINT("unknown floppy option [%s]\n", str); 4079 4080 DPRINT("allowed options are:"); 4081 for (i = 0; i < ARRAY_SIZE(config_params); i++) 4082 pr_cont(" %s", config_params[i].name); 4083 pr_cont("\n"); 4084 } else 4085 DPRINT("botched floppy option\n"); 4086 DPRINT("Read Documentation/blockdev/floppy.txt\n"); 4087 return 0; 4088 } 4089 4090 static int have_no_fdc = -ENODEV; 4091 4092 static ssize_t floppy_cmos_show(struct device *dev, 4093 struct device_attribute *attr, char *buf) 4094 { 4095 struct platform_device *p = to_platform_device(dev); 4096 int drive; 4097 4098 drive = p->id; 4099 return sprintf(buf, "%X\n", UDP->cmos); 4100 } 4101 4102 static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); 4103 4104 static void floppy_device_release(struct device *dev) 4105 { 4106 } 4107 4108 static int floppy_resume(struct device *dev) 4109 { 4110 int fdc; 4111 4112 for (fdc = 0; fdc < N_FDC; fdc++) 4113 if (FDCS->address != -1) 4114 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4115 4116 return 0; 4117 } 4118 4119 static const struct dev_pm_ops floppy_pm_ops = { 4120 .resume = floppy_resume, 4121 .restore = floppy_resume, 4122 }; 4123 4124 static struct platform_driver floppy_driver = { 4125 .driver = { 4126 .name = "floppy", 4127 .pm = &floppy_pm_ops, 4128 }, 4129 }; 4130 4131 static struct platform_device floppy_device[N_DRIVE]; 4132 4133 static struct kobject *floppy_find(dev_t dev, int *part, void *data) 4134 { 4135 int drive = (*part & 3) | ((*part & 0x80) >> 5); 4136 if (drive >= N_DRIVE || 4137 !(allowed_drive_mask & (1 << drive)) || 4138 fdc_state[FDC(drive)].version == FDC_NONE) 4139 return NULL; 4140 if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) 4141 return NULL; 4142 *part = 0; 4143 return get_disk(disks[drive]); 4144 } 4145 4146 static int __init floppy_init(void) 4147 { 4148 int i, unit, drive; 4149 int err, dr; 4150 4151 set_debugt(); 4152 interruptjiffies = resultjiffies = jiffies; 4153 4154 #if defined(CONFIG_PPC) 4155 if (check_legacy_ioport(FDC1)) 4156 return -ENODEV; 4157 #endif 4158 4159 raw_cmd = NULL; 4160 4161 for (dr = 0; dr < N_DRIVE; dr++) { 4162 disks[dr] = alloc_disk(1); 4163 if (!disks[dr]) { 4164 err = -ENOMEM; 4165 goto out_put_disk; 4166 } 4167 4168 disks[dr]->major = FLOPPY_MAJOR; 4169 disks[dr]->first_minor = TOMINOR(dr); 4170 disks[dr]->fops = &floppy_fops; 4171 sprintf(disks[dr]->disk_name, "fd%d", dr); 4172 4173 init_timer(&motor_off_timer[dr]); 4174 motor_off_timer[dr].data = dr; 4175 motor_off_timer[dr].function = motor_off_callback; 4176 } 4177 4178 err = register_blkdev(FLOPPY_MAJOR, "fd"); 4179 if (err) 4180 goto out_put_disk; 4181 4182 err = platform_driver_register(&floppy_driver); 4183 if (err) 4184 goto out_unreg_blkdev; 4185 4186 floppy_queue = blk_init_queue(do_fd_request, &floppy_lock); 4187 if (!floppy_queue) { 4188 err = -ENOMEM; 4189 goto out_unreg_driver; 4190 } 4191 blk_queue_max_hw_sectors(floppy_queue, 64); 4192 4193 blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, 4194 floppy_find, NULL, NULL); 4195 4196 for (i = 0; i < 256; i++) 4197 if (ITYPE(i)) 4198 floppy_sizes[i] = floppy_type[ITYPE(i)].size; 4199 else 4200 floppy_sizes[i] = MAX_DISK_SIZE << 1; 4201 4202 reschedule_timeout(MAXTIMEOUT, "floppy init"); 4203 config_types(); 4204 4205 for (i = 0; i < N_FDC; i++) { 4206 fdc = i; 4207 memset(FDCS, 0, sizeof(*FDCS)); 4208 FDCS->dtr = -1; 4209 FDCS->dor = 0x4; 4210 #if defined(__sparc__) || defined(__mc68000__) 4211 /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ 4212 #ifdef __mc68000__ 4213 if (MACH_IS_SUN3X) 4214 #endif 4215 FDCS->version = FDC_82072A; 4216 #endif 4217 } 4218 4219 use_virtual_dma = can_use_virtual_dma & 1; 4220 fdc_state[0].address = FDC1; 4221 if (fdc_state[0].address == -1) { 4222 del_timer(&fd_timeout); 4223 err = -ENODEV; 4224 goto out_unreg_region; 4225 } 4226 #if N_FDC > 1 4227 fdc_state[1].address = FDC2; 4228 #endif 4229 4230 fdc = 0; /* reset fdc in case of unexpected interrupt */ 4231 err = floppy_grab_irq_and_dma(); 4232 if (err) { 4233 del_timer(&fd_timeout); 4234 err = -EBUSY; 4235 goto out_unreg_region; 4236 } 4237 4238 /* initialise drive state */ 4239 for (drive = 0; drive < N_DRIVE; drive++) { 4240 memset(UDRS, 0, sizeof(*UDRS)); 4241 memset(UDRWE, 0, sizeof(*UDRWE)); 4242 set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); 4243 set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); 4244 set_bit(FD_VERIFY_BIT, &UDRS->flags); 4245 UDRS->fd_device = -1; 4246 floppy_track_buffer = NULL; 4247 max_buffer_sectors = 0; 4248 } 4249 /* 4250 * Small 10 msec delay to let through any interrupt that 4251 * initialization might have triggered, to not 4252 * confuse detection: 4253 */ 4254 msleep(10); 4255 4256 for (i = 0; i < N_FDC; i++) { 4257 fdc = i; 4258 FDCS->driver_version = FD_DRIVER_VERSION; 4259 for (unit = 0; unit < 4; unit++) 4260 FDCS->track[unit] = 0; 4261 if (FDCS->address == -1) 4262 continue; 4263 FDCS->rawcmd = 2; 4264 if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { 4265 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4266 floppy_release_regions(fdc); 4267 FDCS->address = -1; 4268 FDCS->version = FDC_NONE; 4269 continue; 4270 } 4271 /* Try to determine the floppy controller type */ 4272 FDCS->version = get_fdc_version(); 4273 if (FDCS->version == FDC_NONE) { 4274 /* free ioports reserved by floppy_grab_irq_and_dma() */ 4275 floppy_release_regions(fdc); 4276 FDCS->address = -1; 4277 continue; 4278 } 4279 if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) 4280 can_use_virtual_dma = 0; 4281 4282 have_no_fdc = 0; 4283 /* Not all FDCs seem to be able to handle the version command 4284 * properly, so force a reset for the standard FDC clones, 4285 * to avoid interrupt garbage. 4286 */ 4287 user_reset_fdc(-1, FD_RESET_ALWAYS, false); 4288 } 4289 fdc = 0; 4290 del_timer(&fd_timeout); 4291 current_drive = 0; 4292 initialized = true; 4293 if (have_no_fdc) { 4294 DPRINT("no floppy controllers found\n"); 4295 err = have_no_fdc; 4296 goto out_flush_work; 4297 } 4298 4299 for (drive = 0; drive < N_DRIVE; drive++) { 4300 if (!(allowed_drive_mask & (1 << drive))) 4301 continue; 4302 if (fdc_state[FDC(drive)].version == FDC_NONE) 4303 continue; 4304 4305 floppy_device[drive].name = floppy_device_name; 4306 floppy_device[drive].id = drive; 4307 floppy_device[drive].dev.release = floppy_device_release; 4308 4309 err = platform_device_register(&floppy_device[drive]); 4310 if (err) 4311 goto out_flush_work; 4312 4313 err = device_create_file(&floppy_device[drive].dev, 4314 &dev_attr_cmos); 4315 if (err) 4316 goto out_unreg_platform_dev; 4317 4318 /* to be cleaned up... */ 4319 disks[drive]->private_data = (void *)(long)drive; 4320 disks[drive]->queue = floppy_queue; 4321 disks[drive]->flags |= GENHD_FL_REMOVABLE; 4322 disks[drive]->driverfs_dev = &floppy_device[drive].dev; 4323 add_disk(disks[drive]); 4324 } 4325 4326 return 0; 4327 4328 out_unreg_platform_dev: 4329 platform_device_unregister(&floppy_device[drive]); 4330 out_flush_work: 4331 flush_scheduled_work(); 4332 if (atomic_read(&usage_count)) 4333 floppy_release_irq_and_dma(); 4334 out_unreg_region: 4335 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4336 blk_cleanup_queue(floppy_queue); 4337 out_unreg_driver: 4338 platform_driver_unregister(&floppy_driver); 4339 out_unreg_blkdev: 4340 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4341 out_put_disk: 4342 while (dr--) { 4343 del_timer(&motor_off_timer[dr]); 4344 put_disk(disks[dr]); 4345 } 4346 return err; 4347 } 4348 4349 static const struct io_region { 4350 int offset; 4351 int size; 4352 } io_regions[] = { 4353 { 2, 1 }, 4354 /* address + 3 is sometimes reserved by pnp bios for motherboard */ 4355 { 4, 2 }, 4356 /* address + 6 is reserved, and may be taken by IDE. 4357 * Unfortunately, Adaptec doesn't know this :-(, */ 4358 { 7, 1 }, 4359 }; 4360 4361 static void floppy_release_allocated_regions(int fdc, const struct io_region *p) 4362 { 4363 while (p != io_regions) { 4364 p--; 4365 release_region(FDCS->address + p->offset, p->size); 4366 } 4367 } 4368 4369 #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) 4370 4371 static int floppy_request_regions(int fdc) 4372 { 4373 const struct io_region *p; 4374 4375 for (p = io_regions; p < ARRAY_END(io_regions); p++) { 4376 if (!request_region(FDCS->address + p->offset, 4377 p->size, "floppy")) { 4378 DPRINT("Floppy io-port 0x%04lx in use\n", 4379 FDCS->address + p->offset); 4380 floppy_release_allocated_regions(fdc, p); 4381 return -EBUSY; 4382 } 4383 } 4384 return 0; 4385 } 4386 4387 static void floppy_release_regions(int fdc) 4388 { 4389 floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); 4390 } 4391 4392 static int floppy_grab_irq_and_dma(void) 4393 { 4394 if (atomic_inc_return(&usage_count) > 1) 4395 return 0; 4396 4397 /* 4398 * We might have scheduled a free_irq(), wait it to 4399 * drain first: 4400 */ 4401 flush_scheduled_work(); 4402 4403 if (fd_request_irq()) { 4404 DPRINT("Unable to grab IRQ%d for the floppy driver\n", 4405 FLOPPY_IRQ); 4406 atomic_dec(&usage_count); 4407 return -1; 4408 } 4409 if (fd_request_dma()) { 4410 DPRINT("Unable to grab DMA%d for the floppy driver\n", 4411 FLOPPY_DMA); 4412 if (can_use_virtual_dma & 2) 4413 use_virtual_dma = can_use_virtual_dma = 1; 4414 if (!(can_use_virtual_dma & 1)) { 4415 fd_free_irq(); 4416 atomic_dec(&usage_count); 4417 return -1; 4418 } 4419 } 4420 4421 for (fdc = 0; fdc < N_FDC; fdc++) { 4422 if (FDCS->address != -1) { 4423 if (floppy_request_regions(fdc)) 4424 goto cleanup; 4425 } 4426 } 4427 for (fdc = 0; fdc < N_FDC; fdc++) { 4428 if (FDCS->address != -1) { 4429 reset_fdc_info(1); 4430 fd_outb(FDCS->dor, FD_DOR); 4431 } 4432 } 4433 fdc = 0; 4434 set_dor(0, ~0, 8); /* avoid immediate interrupt */ 4435 4436 for (fdc = 0; fdc < N_FDC; fdc++) 4437 if (FDCS->address != -1) 4438 fd_outb(FDCS->dor, FD_DOR); 4439 /* 4440 * The driver will try and free resources and relies on us 4441 * to know if they were allocated or not. 4442 */ 4443 fdc = 0; 4444 irqdma_allocated = 1; 4445 return 0; 4446 cleanup: 4447 fd_free_irq(); 4448 fd_free_dma(); 4449 while (--fdc >= 0) 4450 floppy_release_regions(fdc); 4451 atomic_dec(&usage_count); 4452 return -1; 4453 } 4454 4455 static void floppy_release_irq_and_dma(void) 4456 { 4457 int old_fdc; 4458 #ifndef __sparc__ 4459 int drive; 4460 #endif 4461 long tmpsize; 4462 unsigned long tmpaddr; 4463 4464 if (!atomic_dec_and_test(&usage_count)) 4465 return; 4466 4467 if (irqdma_allocated) { 4468 fd_disable_dma(); 4469 fd_free_dma(); 4470 fd_free_irq(); 4471 irqdma_allocated = 0; 4472 } 4473 set_dor(0, ~0, 8); 4474 #if N_FDC > 1 4475 set_dor(1, ~8, 0); 4476 #endif 4477 floppy_enable_hlt(); 4478 4479 if (floppy_track_buffer && max_buffer_sectors) { 4480 tmpsize = max_buffer_sectors * 1024; 4481 tmpaddr = (unsigned long)floppy_track_buffer; 4482 floppy_track_buffer = NULL; 4483 max_buffer_sectors = 0; 4484 buffer_min = buffer_max = -1; 4485 fd_dma_mem_free(tmpaddr, tmpsize); 4486 } 4487 #ifndef __sparc__ 4488 for (drive = 0; drive < N_FDC * 4; drive++) 4489 if (timer_pending(motor_off_timer + drive)) 4490 pr_info("motor off timer %d still active\n", drive); 4491 #endif 4492 4493 if (timer_pending(&fd_timeout)) 4494 pr_info("floppy timer still active:%s\n", timeout_message); 4495 if (timer_pending(&fd_timer)) 4496 pr_info("auxiliary floppy timer still active\n"); 4497 if (work_pending(&floppy_work)) 4498 pr_info("work still pending\n"); 4499 old_fdc = fdc; 4500 for (fdc = 0; fdc < N_FDC; fdc++) 4501 if (FDCS->address != -1) 4502 floppy_release_regions(fdc); 4503 fdc = old_fdc; 4504 } 4505 4506 #ifdef MODULE 4507 4508 static char *floppy; 4509 4510 static void __init parse_floppy_cfg_string(char *cfg) 4511 { 4512 char *ptr; 4513 4514 while (*cfg) { 4515 ptr = cfg; 4516 while (*cfg && *cfg != ' ' && *cfg != '\t') 4517 cfg++; 4518 if (*cfg) { 4519 *cfg = '\0'; 4520 cfg++; 4521 } 4522 if (*ptr) 4523 floppy_setup(ptr); 4524 } 4525 } 4526 4527 static int __init floppy_module_init(void) 4528 { 4529 if (floppy) 4530 parse_floppy_cfg_string(floppy); 4531 return floppy_init(); 4532 } 4533 module_init(floppy_module_init); 4534 4535 static void __exit floppy_module_exit(void) 4536 { 4537 int drive; 4538 4539 blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); 4540 unregister_blkdev(FLOPPY_MAJOR, "fd"); 4541 platform_driver_unregister(&floppy_driver); 4542 4543 for (drive = 0; drive < N_DRIVE; drive++) { 4544 del_timer_sync(&motor_off_timer[drive]); 4545 4546 if ((allowed_drive_mask & (1 << drive)) && 4547 fdc_state[FDC(drive)].version != FDC_NONE) { 4548 del_gendisk(disks[drive]); 4549 device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); 4550 platform_device_unregister(&floppy_device[drive]); 4551 } 4552 put_disk(disks[drive]); 4553 } 4554 4555 del_timer_sync(&fd_timeout); 4556 del_timer_sync(&fd_timer); 4557 blk_cleanup_queue(floppy_queue); 4558 4559 if (atomic_read(&usage_count)) 4560 floppy_release_irq_and_dma(); 4561 4562 /* eject disk, if any */ 4563 fd_eject(0); 4564 } 4565 4566 module_exit(floppy_module_exit); 4567 4568 module_param(floppy, charp, 0); 4569 module_param(FLOPPY_IRQ, int, 0); 4570 module_param(FLOPPY_DMA, int, 0); 4571 MODULE_AUTHOR("Alain L. Knaff"); 4572 MODULE_SUPPORTED_DEVICE("fd"); 4573 MODULE_LICENSE("GPL"); 4574 4575 /* This doesn't actually get used other than for module information */ 4576 static const struct pnp_device_id floppy_pnpids[] = { 4577 {"PNP0700", 0}, 4578 {} 4579 }; 4580 4581 MODULE_DEVICE_TABLE(pnp, floppy_pnpids); 4582 4583 #else 4584 4585 __setup("floppy=", floppy_setup); 4586 module_init(floppy_init) 4587 #endif 4588 4589 MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); 4590