ide-floppy.c revision 0964dbe60c98f483567ac9a1220f6ab01a15c954
1/* 2 * IDE ATAPI floppy driver. 3 * 4 * Copyright (C) 1996-1999 Gadi Oxman <gadio@netvision.net.il> 5 * Copyright (C) 2000-2002 Paul Bristow <paul@paulbristow.net> 6 * Copyright (C) 2005 Bartlomiej Zolnierkiewicz 7 * 8 * This driver supports the following IDE floppy drives: 9 * 10 * LS-120/240 SuperDisk 11 * Iomega Zip 100/250 12 * Iomega PC Card Clik!/PocketZip 13 * 14 * For a historical changelog see 15 * Documentation/ide/ChangeLog.ide-floppy.1996-2002 16 */ 17 18#define DRV_NAME "ide-floppy" 19#define PFX DRV_NAME ": " 20 21#define IDEFLOPPY_VERSION "1.00" 22 23#include <linux/module.h> 24#include <linux/types.h> 25#include <linux/string.h> 26#include <linux/kernel.h> 27#include <linux/delay.h> 28#include <linux/timer.h> 29#include <linux/mm.h> 30#include <linux/interrupt.h> 31#include <linux/major.h> 32#include <linux/errno.h> 33#include <linux/genhd.h> 34#include <linux/slab.h> 35#include <linux/cdrom.h> 36#include <linux/ide.h> 37#include <linux/hdreg.h> 38#include <linux/bitops.h> 39#include <linux/mutex.h> 40#include <linux/scatterlist.h> 41 42#include <scsi/scsi_ioctl.h> 43 44#include <asm/byteorder.h> 45#include <linux/irq.h> 46#include <linux/uaccess.h> 47#include <linux/io.h> 48#include <asm/unaligned.h> 49 50#include "ide-floppy.h" 51 52/* module parameters */ 53static unsigned long debug_mask; 54module_param(debug_mask, ulong, 0644); 55 56/* define to see debug info */ 57#define IDEFLOPPY_DEBUG_LOG 0 58 59#if IDEFLOPPY_DEBUG_LOG 60#define ide_debug_log(lvl, fmt, args...) __ide_debug_log(lvl, fmt, args) 61#else 62#define ide_debug_log(lvl, fmt, args...) do {} while (0) 63#endif 64 65/* 66 * After each failed packet command we issue a request sense command and retry 67 * the packet command IDEFLOPPY_MAX_PC_RETRIES times. 68 */ 69#define IDEFLOPPY_MAX_PC_RETRIES 3 70 71/* format capacities descriptor codes */ 72#define CAPACITY_INVALID 0x00 73#define CAPACITY_UNFORMATTED 0x01 74#define CAPACITY_CURRENT 0x02 75#define CAPACITY_NO_CARTRIDGE 0x03 76 77/* 78 * The following delay solves a problem with ATAPI Zip 100 drive where BSY bit 79 * was apparently being deasserted before the unit was ready to receive data. 80 */ 81#define IDEFLOPPY_PC_DELAY (HZ/20) /* default delay for ZIP 100 (50ms) */ 82 83/* Error code returned in rq->errors to the higher part of the driver. */ 84#define IDEFLOPPY_ERROR_GENERAL 101 85 86static DEFINE_MUTEX(idefloppy_ref_mutex); 87 88static void idefloppy_cleanup_obj(struct kref *); 89 90static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 91{ 92 struct ide_floppy_obj *floppy = NULL; 93 94 mutex_lock(&idefloppy_ref_mutex); 95 floppy = ide_drv_g(disk, ide_floppy_obj); 96 if (floppy) { 97 if (ide_device_get(floppy->drive)) 98 floppy = NULL; 99 else 100 kref_get(&floppy->kref); 101 } 102 mutex_unlock(&idefloppy_ref_mutex); 103 return floppy; 104} 105 106static void ide_floppy_put(struct ide_floppy_obj *floppy) 107{ 108 ide_drive_t *drive = floppy->drive; 109 110 mutex_lock(&idefloppy_ref_mutex); 111 kref_put(&floppy->kref, idefloppy_cleanup_obj); 112 ide_device_put(drive); 113 mutex_unlock(&idefloppy_ref_mutex); 114} 115 116/* 117 * Used to finish servicing a request. For read/write requests, we will call 118 * ide_end_request to pass to the next buffer. 119 */ 120static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 121{ 122 idefloppy_floppy_t *floppy = drive->driver_data; 123 struct request *rq = HWGROUP(drive)->rq; 124 int error; 125 126 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 127 128 switch (uptodate) { 129 case 0: 130 error = IDEFLOPPY_ERROR_GENERAL; 131 break; 132 133 case 1: 134 error = 0; 135 break; 136 137 default: 138 error = uptodate; 139 } 140 141 if (error) 142 floppy->failed_pc = NULL; 143 /* Why does this happen? */ 144 if (!rq) 145 return 0; 146 if (!blk_special_request(rq)) { 147 /* our real local end request function */ 148 ide_end_request(drive, uptodate, nsecs); 149 return 0; 150 } 151 rq->errors = error; 152 /* fixme: need to move this local also */ 153 ide_end_drive_cmd(drive, 0, 0); 154 return 0; 155} 156 157static void idefloppy_update_buffers(ide_drive_t *drive, 158 struct ide_atapi_pc *pc) 159{ 160 struct request *rq = pc->rq; 161 struct bio *bio = rq->bio; 162 163 while ((bio = rq->bio) != NULL) 164 idefloppy_end_request(drive, 1, 0); 165} 166 167static void ide_floppy_callback(ide_drive_t *drive, int dsc) 168{ 169 idefloppy_floppy_t *floppy = drive->driver_data; 170 struct ide_atapi_pc *pc = drive->pc; 171 int uptodate = pc->error ? 0 : 1; 172 173 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 174 175 if (floppy->failed_pc == pc) 176 floppy->failed_pc = NULL; 177 178 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || 179 (pc->rq && blk_pc_request(pc->rq))) 180 uptodate = 1; /* FIXME */ 181 else if (pc->c[0] == GPCMD_REQUEST_SENSE) { 182 u8 *buf = pc->buf; 183 184 if (!pc->error) { 185 floppy->sense_key = buf[2] & 0x0F; 186 floppy->asc = buf[12]; 187 floppy->ascq = buf[13]; 188 floppy->progress_indication = buf[15] & 0x80 ? 189 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 190 191 if (floppy->failed_pc) 192 ide_debug_log(IDE_DBG_PC, "pc = %x, ", 193 floppy->failed_pc->c[0]); 194 195 ide_debug_log(IDE_DBG_SENSE, "sense key = %x, asc = %x," 196 "ascq = %x\n", floppy->sense_key, 197 floppy->asc, floppy->ascq); 198 } else 199 printk(KERN_ERR PFX "Error in REQUEST SENSE itself - " 200 "Aborting request!\n"); 201 } 202 203 idefloppy_end_request(drive, uptodate, 0); 204} 205 206static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 207 struct ide_atapi_pc *pc) 208{ 209 /* supress error messages resulting from Medium not present */ 210 if (floppy->sense_key == 0x02 && 211 floppy->asc == 0x3a && 212 floppy->ascq == 0x00) 213 return; 214 215 printk(KERN_ERR PFX "%s: I/O error, pc = %2x, key = %2x, " 216 "asc = %2x, ascq = %2x\n", 217 floppy->drive->name, pc->c[0], floppy->sense_key, 218 floppy->asc, floppy->ascq); 219 220} 221 222static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 223 struct ide_atapi_pc *pc) 224{ 225 idefloppy_floppy_t *floppy = drive->driver_data; 226 227 if (floppy->failed_pc == NULL && 228 pc->c[0] != GPCMD_REQUEST_SENSE) 229 floppy->failed_pc = pc; 230 231 /* Set the current packet command */ 232 drive->pc = pc; 233 234 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 235 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 236 ide_floppy_report_error(floppy, pc); 237 /* Giving up */ 238 pc->error = IDEFLOPPY_ERROR_GENERAL; 239 240 floppy->failed_pc = NULL; 241 drive->pc_callback(drive, 0); 242 return ide_stopped; 243 } 244 245 ide_debug_log(IDE_DBG_FUNC, "%s: Retry #%d\n", __func__, pc->retries); 246 247 pc->retries++; 248 249 return ide_issue_pc(drive, WAIT_FLOPPY_CMD, NULL); 250} 251 252void ide_floppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 253{ 254 ide_init_pc(pc); 255 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 256 pc->c[7] = 255; 257 pc->c[8] = 255; 258 pc->req_xfer = 255; 259} 260 261/* A mode sense command is used to "sense" floppy parameters. */ 262void ide_floppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, u8 page_code) 263{ 264 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 265 266 ide_init_pc(pc); 267 pc->c[0] = GPCMD_MODE_SENSE_10; 268 pc->c[1] = 0; 269 pc->c[2] = page_code; 270 271 switch (page_code) { 272 case IDEFLOPPY_CAPABILITIES_PAGE: 273 length += 12; 274 break; 275 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 276 length += 32; 277 break; 278 default: 279 printk(KERN_ERR PFX "unsupported page code in %s\n", __func__); 280 } 281 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 282 pc->req_xfer = length; 283} 284 285static void idefloppy_create_rw_cmd(ide_drive_t *drive, 286 struct ide_atapi_pc *pc, struct request *rq, 287 unsigned long sector) 288{ 289 idefloppy_floppy_t *floppy = drive->driver_data; 290 int block = sector / floppy->bs_factor; 291 int blocks = rq->nr_sectors / floppy->bs_factor; 292 int cmd = rq_data_dir(rq); 293 294 ide_debug_log(IDE_DBG_FUNC, "%s: block: %d, blocks: %d\n", __func__, 295 block, blocks); 296 297 ide_init_pc(pc); 298 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 299 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 300 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 301 302 memcpy(rq->cmd, pc->c, 12); 303 304 pc->rq = rq; 305 pc->b_count = 0; 306 if (rq->cmd_flags & REQ_RW) 307 pc->flags |= PC_FLAG_WRITING; 308 pc->buf = NULL; 309 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 310 pc->flags |= PC_FLAG_DMA_OK; 311} 312 313static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 314 struct ide_atapi_pc *pc, struct request *rq) 315{ 316 ide_init_pc(pc); 317 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 318 pc->rq = rq; 319 pc->b_count = 0; 320 if (rq->data_len && rq_data_dir(rq) == WRITE) 321 pc->flags |= PC_FLAG_WRITING; 322 pc->buf = rq->data; 323 if (rq->bio) 324 pc->flags |= PC_FLAG_DMA_OK; 325 /* 326 * possibly problematic, doesn't look like ide-floppy correctly 327 * handled scattered requests if dma fails... 328 */ 329 pc->req_xfer = pc->buf_size = rq->data_len; 330} 331 332static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 333 struct request *rq, sector_t block_s) 334{ 335 idefloppy_floppy_t *floppy = drive->driver_data; 336 ide_hwif_t *hwif = drive->hwif; 337 struct ide_atapi_pc *pc; 338 unsigned long block = (unsigned long)block_s; 339 340 ide_debug_log(IDE_DBG_FUNC, "%s: dev: %s, cmd: 0x%x, cmd_type: %x, " 341 "errors: %d\n", 342 __func__, rq->rq_disk ? rq->rq_disk->disk_name : "?", 343 rq->cmd[0], rq->cmd_type, rq->errors); 344 345 ide_debug_log(IDE_DBG_FUNC, "%s: sector: %ld, nr_sectors: %ld, " 346 "current_nr_sectors: %d\n", 347 __func__, (long)rq->sector, rq->nr_sectors, 348 rq->current_nr_sectors); 349 350 if (rq->errors >= ERROR_MAX) { 351 if (floppy->failed_pc) 352 ide_floppy_report_error(floppy, floppy->failed_pc); 353 else 354 printk(KERN_ERR PFX "%s: I/O error\n", drive->name); 355 356 idefloppy_end_request(drive, 0, 0); 357 return ide_stopped; 358 } 359 if (blk_fs_request(rq)) { 360 if (((long)rq->sector % floppy->bs_factor) || 361 (rq->nr_sectors % floppy->bs_factor)) { 362 printk(KERN_ERR PFX "%s: unsupported r/w rq size\n", 363 drive->name); 364 idefloppy_end_request(drive, 0, 0); 365 return ide_stopped; 366 } 367 pc = &floppy->queued_pc; 368 idefloppy_create_rw_cmd(drive, pc, rq, block); 369 } else if (blk_special_request(rq)) { 370 pc = (struct ide_atapi_pc *) rq->buffer; 371 } else if (blk_pc_request(rq)) { 372 pc = &floppy->queued_pc; 373 idefloppy_blockpc_cmd(floppy, pc, rq); 374 } else { 375 blk_dump_rq_flags(rq, PFX "unsupported command in queue"); 376 idefloppy_end_request(drive, 0, 0); 377 return ide_stopped; 378 } 379 380 ide_init_sg_cmd(drive, rq); 381 ide_map_sg(drive, rq); 382 383 pc->sg = hwif->sg_table; 384 pc->sg_cnt = hwif->sg_nents; 385 386 pc->rq = rq; 387 388 return idefloppy_issue_pc(drive, pc); 389} 390 391/* 392 * Look at the flexible disk page parameters. We ignore the CHS capacity 393 * parameters and use the LBA parameters instead. 394 */ 395static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 396{ 397 idefloppy_floppy_t *floppy = drive->driver_data; 398 struct gendisk *disk = floppy->disk; 399 struct ide_atapi_pc pc; 400 u8 *page; 401 int capacity, lba_capacity; 402 u16 transfer_rate, sector_size, cyls, rpm; 403 u8 heads, sectors; 404 405 ide_floppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE); 406 407 if (ide_queue_pc_tail(drive, disk, &pc)) { 408 printk(KERN_ERR PFX "Can't get flexible disk page params\n"); 409 return 1; 410 } 411 412 if (pc.buf[3] & 0x80) 413 drive->atapi_flags |= IDE_AFLAG_WP; 414 else 415 drive->atapi_flags &= ~IDE_AFLAG_WP; 416 417 set_disk_ro(disk, !!(drive->atapi_flags & IDE_AFLAG_WP)); 418 419 page = &pc.buf[8]; 420 421 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]); 422 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]); 423 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]); 424 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]); 425 heads = pc.buf[8 + 4]; 426 sectors = pc.buf[8 + 5]; 427 428 capacity = cyls * heads * sectors * sector_size; 429 430 if (memcmp(page, &floppy->flexible_disk_page, 32)) 431 printk(KERN_INFO PFX "%s: %dkB, %d/%d/%d CHS, %d kBps, " 432 "%d sector size, %d rpm\n", 433 drive->name, capacity / 1024, cyls, heads, 434 sectors, transfer_rate / 8, sector_size, rpm); 435 436 memcpy(&floppy->flexible_disk_page, page, 32); 437 drive->bios_cyl = cyls; 438 drive->bios_head = heads; 439 drive->bios_sect = sectors; 440 lba_capacity = floppy->blocks * floppy->block_size; 441 442 if (capacity < lba_capacity) { 443 printk(KERN_NOTICE PFX "%s: The disk reports a capacity of %d " 444 "bytes, but the drive only handles %d\n", 445 drive->name, lba_capacity, capacity); 446 floppy->blocks = floppy->block_size ? 447 capacity / floppy->block_size : 0; 448 } 449 return 0; 450} 451 452/* 453 * Determine if a media is present in the floppy drive, and if so, its LBA 454 * capacity. 455 */ 456static int ide_floppy_get_capacity(ide_drive_t *drive) 457{ 458 idefloppy_floppy_t *floppy = drive->driver_data; 459 struct gendisk *disk = floppy->disk; 460 struct ide_atapi_pc pc; 461 u8 *cap_desc; 462 u8 header_len, desc_cnt; 463 int i, rc = 1, blocks, length; 464 465 drive->bios_cyl = 0; 466 drive->bios_head = drive->bios_sect = 0; 467 floppy->blocks = 0; 468 floppy->bs_factor = 1; 469 set_capacity(floppy->disk, 0); 470 471 ide_floppy_create_read_capacity_cmd(&pc); 472 if (ide_queue_pc_tail(drive, disk, &pc)) { 473 printk(KERN_ERR PFX "Can't get floppy parameters\n"); 474 return 1; 475 } 476 header_len = pc.buf[3]; 477 cap_desc = &pc.buf[4]; 478 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 479 480 for (i = 0; i < desc_cnt; i++) { 481 unsigned int desc_start = 4 + i*8; 482 483 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); 484 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); 485 486 ide_debug_log(IDE_DBG_PROBE, "Descriptor %d: %dkB, %d blocks, " 487 "%d sector size\n", 488 i, blocks * length / 1024, blocks, length); 489 490 if (i) 491 continue; 492 /* 493 * the code below is valid only for the 1st descriptor, ie i=0 494 */ 495 496 switch (pc.buf[desc_start + 4] & 0x03) { 497 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 498 case CAPACITY_UNFORMATTED: 499 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 500 /* 501 * If it is not a clik drive, break out 502 * (maintains previous driver behaviour) 503 */ 504 break; 505 case CAPACITY_CURRENT: 506 /* Normal Zip/LS-120 disks */ 507 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 508 printk(KERN_INFO PFX "%s: %dkB, %d blocks, %d " 509 "sector size\n", 510 drive->name, blocks * length / 1024, 511 blocks, length); 512 memcpy(&floppy->cap_desc, cap_desc, 8); 513 514 if (!length || length % 512) { 515 printk(KERN_NOTICE PFX "%s: %d bytes block size" 516 " not supported\n", drive->name, length); 517 } else { 518 floppy->blocks = blocks; 519 floppy->block_size = length; 520 floppy->bs_factor = length / 512; 521 if (floppy->bs_factor != 1) 522 printk(KERN_NOTICE PFX "%s: Warning: " 523 "non 512 bytes block size not " 524 "fully supported\n", 525 drive->name); 526 rc = 0; 527 } 528 break; 529 case CAPACITY_NO_CARTRIDGE: 530 /* 531 * This is a KERN_ERR so it appears on screen 532 * for the user to see 533 */ 534 printk(KERN_ERR PFX "%s: No disk in drive\n", 535 drive->name); 536 break; 537 case CAPACITY_INVALID: 538 printk(KERN_ERR PFX "%s: Invalid capacity for disk " 539 "in drive\n", drive->name); 540 break; 541 } 542 ide_debug_log(IDE_DBG_PROBE, "Descriptor 0 Code: %d\n", 543 pc.buf[desc_start + 4] & 0x03); 544 } 545 546 /* Clik! disk does not support get_flexible_disk_page */ 547 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 548 (void) ide_floppy_get_flexible_disk_page(drive); 549 550 set_capacity(disk, floppy->blocks * floppy->bs_factor); 551 552 return rc; 553} 554 555static sector_t idefloppy_capacity(ide_drive_t *drive) 556{ 557 idefloppy_floppy_t *floppy = drive->driver_data; 558 unsigned long capacity = floppy->blocks * floppy->bs_factor; 559 560 return capacity; 561} 562 563#ifdef CONFIG_IDE_PROC_FS 564ide_devset_rw_field(bios_cyl, bios_cyl); 565ide_devset_rw_field(bios_head, bios_head); 566ide_devset_rw_field(bios_sect, bios_sect); 567ide_devset_rw_field(ticks, pc_delay); 568 569static const struct ide_proc_devset idefloppy_settings[] = { 570 IDE_PROC_DEVSET(bios_cyl, 0, 1023), 571 IDE_PROC_DEVSET(bios_head, 0, 255), 572 IDE_PROC_DEVSET(bios_sect, 0, 63), 573 IDE_PROC_DEVSET(ticks, 0, 255), 574 { 0 }, 575}; 576#endif 577 578static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 579{ 580 u16 *id = drive->id; 581 u8 gcw[2]; 582 583 *((u16 *)&gcw) = id[ATA_ID_CONFIG]; 584 585 drive->pc_callback = ide_floppy_callback; 586 drive->pc_update_buffers = idefloppy_update_buffers; 587 drive->pc_io_buffers = ide_io_buffers; 588 589 if (((gcw[0] & 0x60) >> 5) == 1) 590 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 591 /* 592 * We used to check revisions here. At this point however I'm giving up. 593 * Just assume they are all broken, its easier. 594 * 595 * The actual reason for the workarounds was likely a driver bug after 596 * all rather than a firmware bug, and the workaround below used to hide 597 * it. It should be fixed as of version 1.9, but to be on the safe side 598 * we'll leave the limitation below for the 2.2.x tree. 599 */ 600 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { 601 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; 602 /* This value will be visible in the /proc/ide/hdx/settings */ 603 drive->pc_delay = IDEFLOPPY_PC_DELAY; 604 blk_queue_max_sectors(drive->queue, 64); 605 } 606 607 /* 608 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 609 * nasty clicking noises without it, so please don't remove this. 610 */ 611 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { 612 blk_queue_max_sectors(drive->queue, 64); 613 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; 614 /* IOMEGA Clik! drives do not support lock/unlock commands */ 615 drive->atapi_flags |= IDE_AFLAG_NO_DOORLOCK; 616 } 617 618 (void) ide_floppy_get_capacity(drive); 619 620 ide_proc_register_driver(drive, floppy->driver); 621} 622 623static void ide_floppy_remove(ide_drive_t *drive) 624{ 625 idefloppy_floppy_t *floppy = drive->driver_data; 626 struct gendisk *g = floppy->disk; 627 628 ide_proc_unregister_driver(drive, floppy->driver); 629 630 del_gendisk(g); 631 632 ide_floppy_put(floppy); 633} 634 635static void idefloppy_cleanup_obj(struct kref *kref) 636{ 637 struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj); 638 ide_drive_t *drive = floppy->drive; 639 struct gendisk *g = floppy->disk; 640 641 drive->driver_data = NULL; 642 g->private_data = NULL; 643 put_disk(g); 644 kfree(floppy); 645} 646 647#ifdef CONFIG_IDE_PROC_FS 648static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 649 int count, int *eof, void *data) 650{ 651 ide_drive_t*drive = (ide_drive_t *)data; 652 int len; 653 654 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 655 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 656} 657 658static ide_proc_entry_t idefloppy_proc[] = { 659 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 660 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 661 { NULL, 0, NULL, NULL } 662}; 663#endif /* CONFIG_IDE_PROC_FS */ 664 665static int ide_floppy_probe(ide_drive_t *); 666 667static ide_driver_t idefloppy_driver = { 668 .gen_driver = { 669 .owner = THIS_MODULE, 670 .name = "ide-floppy", 671 .bus = &ide_bus_type, 672 }, 673 .probe = ide_floppy_probe, 674 .remove = ide_floppy_remove, 675 .version = IDEFLOPPY_VERSION, 676 .media = ide_floppy, 677 .do_request = idefloppy_do_request, 678 .end_request = idefloppy_end_request, 679 .error = __ide_error, 680#ifdef CONFIG_IDE_PROC_FS 681 .proc = idefloppy_proc, 682 .settings = idefloppy_settings, 683#endif 684}; 685 686static int idefloppy_open(struct inode *inode, struct file *filp) 687{ 688 struct gendisk *disk = inode->i_bdev->bd_disk; 689 struct ide_floppy_obj *floppy; 690 ide_drive_t *drive; 691 int ret = 0; 692 693 floppy = ide_floppy_get(disk); 694 if (!floppy) 695 return -ENXIO; 696 697 drive = floppy->drive; 698 699 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 700 701 floppy->openers++; 702 703 if (floppy->openers == 1) { 704 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 705 /* Just in case */ 706 707 if (ide_do_test_unit_ready(drive, disk)) 708 ide_do_start_stop(drive, disk, 1); 709 710 if (ide_floppy_get_capacity(drive) 711 && (filp->f_flags & O_NDELAY) == 0 712 /* 713 * Allow O_NDELAY to open a drive without a disk, or with an 714 * unreadable disk, so that we can get the format capacity 715 * of the drive or begin the format - Sam 716 */ 717 ) { 718 ret = -EIO; 719 goto out_put_floppy; 720 } 721 722 if ((drive->atapi_flags & IDE_AFLAG_WP) && (filp->f_mode & 2)) { 723 ret = -EROFS; 724 goto out_put_floppy; 725 } 726 727 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 728 ide_set_media_lock(drive, disk, 1); 729 check_disk_change(inode->i_bdev); 730 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) { 731 ret = -EBUSY; 732 goto out_put_floppy; 733 } 734 return 0; 735 736out_put_floppy: 737 floppy->openers--; 738 ide_floppy_put(floppy); 739 return ret; 740} 741 742static int idefloppy_release(struct inode *inode, struct file *filp) 743{ 744 struct gendisk *disk = inode->i_bdev->bd_disk; 745 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj); 746 ide_drive_t *drive = floppy->drive; 747 748 ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__); 749 750 if (floppy->openers == 1) { 751 ide_set_media_lock(drive, disk, 0); 752 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 753 } 754 755 floppy->openers--; 756 757 ide_floppy_put(floppy); 758 759 return 0; 760} 761 762static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 763{ 764 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk, 765 ide_floppy_obj); 766 ide_drive_t *drive = floppy->drive; 767 768 geo->heads = drive->bios_head; 769 geo->sectors = drive->bios_sect; 770 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 771 return 0; 772} 773 774static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, 775 unsigned long arg, unsigned int cmd) 776{ 777 idefloppy_floppy_t *floppy = drive->driver_data; 778 struct gendisk *disk = floppy->disk; 779 int prevent = (arg && cmd != CDROMEJECT) ? 1 : 0; 780 781 if (floppy->openers > 1) 782 return -EBUSY; 783 784 ide_set_media_lock(drive, disk, prevent); 785 786 if (cmd == CDROMEJECT) 787 ide_do_start_stop(drive, disk, 2); 788 789 return 0; 790} 791 792static int idefloppy_ioctl(struct inode *inode, struct file *file, 793 unsigned int cmd, unsigned long arg) 794{ 795 struct block_device *bdev = inode->i_bdev; 796 struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk, 797 ide_floppy_obj); 798 ide_drive_t *drive = floppy->drive; 799 struct ide_atapi_pc pc; 800 void __user *argp = (void __user *)arg; 801 int err; 802 803 if (cmd == CDROMEJECT || cmd == CDROM_LOCKDOOR) 804 return ide_floppy_lockdoor(drive, &pc, arg, cmd); 805 806 err = ide_floppy_format_ioctl(drive, file, cmd, argp); 807 if (err != -ENOTTY) 808 return err; 809 810 /* 811 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 812 * and CDROM_SEND_PACKET (legacy) ioctls 813 */ 814 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 815 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 816 bdev->bd_disk, cmd, argp); 817 818 if (err == -ENOTTY) 819 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 820 821 return err; 822} 823 824static int idefloppy_media_changed(struct gendisk *disk) 825{ 826 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj); 827 ide_drive_t *drive = floppy->drive; 828 int ret; 829 830 /* do not scan partitions twice if this is a removable device */ 831 if (drive->attach) { 832 drive->attach = 0; 833 return 0; 834 } 835 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED); 836 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED; 837 return ret; 838} 839 840static int idefloppy_revalidate_disk(struct gendisk *disk) 841{ 842 struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj); 843 set_capacity(disk, idefloppy_capacity(floppy->drive)); 844 return 0; 845} 846 847static struct block_device_operations idefloppy_ops = { 848 .owner = THIS_MODULE, 849 .open = idefloppy_open, 850 .release = idefloppy_release, 851 .ioctl = idefloppy_ioctl, 852 .getgeo = idefloppy_getgeo, 853 .media_changed = idefloppy_media_changed, 854 .revalidate_disk = idefloppy_revalidate_disk 855}; 856 857static int ide_floppy_probe(ide_drive_t *drive) 858{ 859 idefloppy_floppy_t *floppy; 860 struct gendisk *g; 861 862 if (!strstr("ide-floppy", drive->driver_req)) 863 goto failed; 864 865 if (drive->media != ide_floppy) 866 goto failed; 867 868 if (!ide_check_atapi_device(drive, DRV_NAME)) { 869 printk(KERN_ERR PFX "%s: not supported by this version of " 870 DRV_NAME "\n", drive->name); 871 goto failed; 872 } 873 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 874 if (!floppy) { 875 printk(KERN_ERR PFX "%s: Can't allocate a floppy structure\n", 876 drive->name); 877 goto failed; 878 } 879 880 g = alloc_disk(1 << PARTN_BITS); 881 if (!g) 882 goto out_free_floppy; 883 884 ide_init_disk(g, drive); 885 886 kref_init(&floppy->kref); 887 888 floppy->drive = drive; 889 floppy->driver = &idefloppy_driver; 890 floppy->disk = g; 891 892 g->private_data = &floppy->driver; 893 894 drive->driver_data = floppy; 895 896 drive->debug_mask = debug_mask; 897 898 idefloppy_setup(drive, floppy); 899 900 g->minors = 1 << PARTN_BITS; 901 g->driverfs_dev = &drive->gendev; 902 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 903 g->fops = &idefloppy_ops; 904 drive->attach = 1; 905 add_disk(g); 906 return 0; 907 908out_free_floppy: 909 kfree(floppy); 910failed: 911 return -ENODEV; 912} 913 914static void __exit idefloppy_exit(void) 915{ 916 driver_unregister(&idefloppy_driver.gen_driver); 917} 918 919static int __init idefloppy_init(void) 920{ 921 printk(KERN_INFO DRV_NAME " driver " IDEFLOPPY_VERSION "\n"); 922 return driver_register(&idefloppy_driver.gen_driver); 923} 924 925MODULE_ALIAS("ide:*m-floppy*"); 926MODULE_ALIAS("ide-floppy"); 927module_init(idefloppy_init); 928module_exit(idefloppy_exit); 929MODULE_LICENSE("GPL"); 930MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 931 932