ide-floppy.c revision 2a924662b646fa25cb491d50aa1202a94aa4ac55
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 IDEFLOPPY_VERSION "1.00" 19 20#include <linux/module.h> 21#include <linux/types.h> 22#include <linux/string.h> 23#include <linux/kernel.h> 24#include <linux/delay.h> 25#include <linux/timer.h> 26#include <linux/mm.h> 27#include <linux/interrupt.h> 28#include <linux/major.h> 29#include <linux/errno.h> 30#include <linux/genhd.h> 31#include <linux/slab.h> 32#include <linux/cdrom.h> 33#include <linux/ide.h> 34#include <linux/bitops.h> 35#include <linux/mutex.h> 36 37#include <scsi/scsi_ioctl.h> 38 39#include <asm/byteorder.h> 40#include <linux/irq.h> 41#include <linux/uaccess.h> 42#include <linux/io.h> 43#include <asm/unaligned.h> 44 45/* define to see debug info */ 46#define IDEFLOPPY_DEBUG_LOG 0 47 48/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 49#define IDEFLOPPY_DEBUG(fmt, args...) 50 51#if IDEFLOPPY_DEBUG_LOG 52#define debug_log(fmt, args...) \ 53 printk(KERN_INFO "ide-floppy: " fmt, ## args) 54#else 55#define debug_log(fmt, args...) do {} while (0) 56#endif 57 58 59/* Some drives require a longer irq timeout. */ 60#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 61 62/* 63 * After each failed packet command we issue a request sense command and retry 64 * the packet command IDEFLOPPY_MAX_PC_RETRIES times. 65 */ 66#define IDEFLOPPY_MAX_PC_RETRIES 3 67 68/* 69 * With each packet command, we allocate a buffer of IDEFLOPPY_PC_BUFFER_SIZE 70 * bytes. 71 */ 72#define IDEFLOPPY_PC_BUFFER_SIZE 256 73 74/* 75 * In various places in the driver, we need to allocate storage for packet 76 * commands and requests, which will remain valid while we leave the driver to 77 * wait for an interrupt or a timeout event. 78 */ 79#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 80 81/* format capacities descriptor codes */ 82#define CAPACITY_INVALID 0x00 83#define CAPACITY_UNFORMATTED 0x01 84#define CAPACITY_CURRENT 0x02 85#define CAPACITY_NO_CARTRIDGE 0x03 86 87/* 88 * Most of our global data which we need to save even as we leave the driver 89 * due to an interrupt or a timer event is stored in a variable of type 90 * idefloppy_floppy_t, defined below. 91 */ 92typedef struct ide_floppy_obj { 93 ide_drive_t *drive; 94 ide_driver_t *driver; 95 struct gendisk *disk; 96 struct kref kref; 97 unsigned int openers; /* protected by BKL for now */ 98 99 /* Current packet command */ 100 struct ide_atapi_pc *pc; 101 /* Last failed packet command */ 102 struct ide_atapi_pc *failed_pc; 103 /* Packet command stack */ 104 struct ide_atapi_pc pc_stack[IDEFLOPPY_PC_STACK]; 105 /* Next free packet command storage space */ 106 int pc_stack_index; 107 struct request rq_stack[IDEFLOPPY_PC_STACK]; 108 /* We implement a circular array */ 109 int rq_stack_index; 110 111 /* Last error information */ 112 u8 sense_key, asc, ascq; 113 /* delay this long before sending packet command */ 114 u8 ticks; 115 int progress_indication; 116 117 /* Device information */ 118 /* Current format */ 119 int blocks, block_size, bs_factor; 120 /* Last format capacity descriptor */ 121 u8 cap_desc[8]; 122 /* Copy of the flexible disk page */ 123 u8 flexible_disk_page[32]; 124 /* Write protect */ 125 int wp; 126 /* Supports format progress report */ 127 int srfp; 128} idefloppy_floppy_t; 129 130#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 131 132/* Defines for the MODE SENSE command */ 133#define MODE_SENSE_CURRENT 0x00 134#define MODE_SENSE_CHANGEABLE 0x01 135#define MODE_SENSE_DEFAULT 0x02 136#define MODE_SENSE_SAVED 0x03 137 138/* IOCTLs used in low-level formatting. */ 139#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 140#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 141#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 142#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 143 144/* Error code returned in rq->errors to the higher part of the driver. */ 145#define IDEFLOPPY_ERROR_GENERAL 101 146 147/* 148 * Pages of the SELECT SENSE / MODE SENSE packet commands. 149 * See SFF-8070i spec. 150 */ 151#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 152#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 153 154static DEFINE_MUTEX(idefloppy_ref_mutex); 155 156#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 157 158#define ide_floppy_g(disk) \ 159 container_of((disk)->private_data, struct ide_floppy_obj, driver) 160 161static void idefloppy_cleanup_obj(struct kref *); 162 163static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 164{ 165 struct ide_floppy_obj *floppy = NULL; 166 167 mutex_lock(&idefloppy_ref_mutex); 168 floppy = ide_floppy_g(disk); 169 if (floppy) { 170 if (ide_device_get(floppy->drive)) 171 floppy = NULL; 172 else 173 kref_get(&floppy->kref); 174 } 175 mutex_unlock(&idefloppy_ref_mutex); 176 return floppy; 177} 178 179static void ide_floppy_put(struct ide_floppy_obj *floppy) 180{ 181 ide_drive_t *drive = floppy->drive; 182 183 mutex_lock(&idefloppy_ref_mutex); 184 kref_put(&floppy->kref, idefloppy_cleanup_obj); 185 ide_device_put(drive); 186 mutex_unlock(&idefloppy_ref_mutex); 187} 188 189/* 190 * Used to finish servicing a request. For read/write requests, we will call 191 * ide_end_request to pass to the next buffer. 192 */ 193static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 194{ 195 idefloppy_floppy_t *floppy = drive->driver_data; 196 struct request *rq = HWGROUP(drive)->rq; 197 int error; 198 199 debug_log("Reached %s\n", __func__); 200 201 switch (uptodate) { 202 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 203 case 1: error = 0; break; 204 default: error = uptodate; 205 } 206 if (error) 207 floppy->failed_pc = NULL; 208 /* Why does this happen? */ 209 if (!rq) 210 return 0; 211 if (!blk_special_request(rq)) { 212 /* our real local end request function */ 213 ide_end_request(drive, uptodate, nsecs); 214 return 0; 215 } 216 rq->errors = error; 217 /* fixme: need to move this local also */ 218 ide_end_drive_cmd(drive, 0, 0); 219 return 0; 220} 221 222static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, 223 unsigned int bcount, int direction) 224{ 225 ide_hwif_t *hwif = drive->hwif; 226 struct request *rq = pc->rq; 227 struct req_iterator iter; 228 struct bio_vec *bvec; 229 unsigned long flags; 230 int count, done = 0; 231 char *data; 232 233 rq_for_each_segment(bvec, rq, iter) { 234 if (!bcount) 235 break; 236 237 count = min(bvec->bv_len, bcount); 238 239 data = bvec_kmap_irq(bvec, &flags); 240 if (direction) 241 hwif->tp_ops->output_data(drive, NULL, data, count); 242 else 243 hwif->tp_ops->input_data(drive, NULL, data, count); 244 bvec_kunmap_irq(data, &flags); 245 246 bcount -= count; 247 pc->b_count += count; 248 done += count; 249 } 250 251 idefloppy_end_request(drive, 1, done >> 9); 252 253 if (bcount) { 254 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", 255 drive->name, __func__, bcount); 256 ide_pad_transfer(drive, direction, bcount); 257 } 258} 259 260static void idefloppy_update_buffers(ide_drive_t *drive, 261 struct ide_atapi_pc *pc) 262{ 263 struct request *rq = pc->rq; 264 struct bio *bio = rq->bio; 265 266 while ((bio = rq->bio) != NULL) 267 idefloppy_end_request(drive, 1, 0); 268} 269 270/* 271 * Generate a new packet command request in front of the request queue, before 272 * the current request so that it will be processed immediately, on the next 273 * pass through the driver. 274 */ 275static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc, 276 struct request *rq) 277{ 278 struct ide_floppy_obj *floppy = drive->driver_data; 279 280 blk_rq_init(NULL, rq); 281 rq->buffer = (char *) pc; 282 rq->cmd_type = REQ_TYPE_SPECIAL; 283 rq->cmd_flags |= REQ_PREEMPT; 284 rq->rq_disk = floppy->disk; 285 memcpy(rq->cmd, pc->c, 12); 286 ide_do_drive_cmd(drive, rq); 287} 288 289static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive) 290{ 291 idefloppy_floppy_t *floppy = drive->driver_data; 292 293 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 294 floppy->pc_stack_index = 0; 295 return (&floppy->pc_stack[floppy->pc_stack_index++]); 296} 297 298static struct request *idefloppy_next_rq_storage(ide_drive_t *drive) 299{ 300 idefloppy_floppy_t *floppy = drive->driver_data; 301 302 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 303 floppy->rq_stack_index = 0; 304 return (&floppy->rq_stack[floppy->rq_stack_index++]); 305} 306 307static void ide_floppy_callback(ide_drive_t *drive) 308{ 309 idefloppy_floppy_t *floppy = drive->driver_data; 310 struct ide_atapi_pc *pc = floppy->pc; 311 int uptodate = pc->error ? 0 : 1; 312 313 debug_log("Reached %s\n", __func__); 314 315 if (floppy->failed_pc == pc) 316 floppy->failed_pc = NULL; 317 318 if (pc->c[0] == GPCMD_READ_10 || pc->c[0] == GPCMD_WRITE_10 || 319 (pc->rq && blk_pc_request(pc->rq))) 320 uptodate = 1; /* FIXME */ 321 else if (pc->c[0] == GPCMD_REQUEST_SENSE) { 322 u8 *buf = floppy->pc->buf; 323 324 if (!pc->error) { 325 floppy->sense_key = buf[2] & 0x0F; 326 floppy->asc = buf[12]; 327 floppy->ascq = buf[13]; 328 floppy->progress_indication = buf[15] & 0x80 ? 329 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 330 331 if (floppy->failed_pc) 332 debug_log("pc = %x, ", floppy->failed_pc->c[0]); 333 334 debug_log("sense key = %x, asc = %x, ascq = %x\n", 335 floppy->sense_key, floppy->asc, floppy->ascq); 336 } else 337 printk(KERN_ERR "Error in REQUEST SENSE itself - " 338 "Aborting request!\n"); 339 } 340 341 idefloppy_end_request(drive, uptodate, 0); 342} 343 344static void idefloppy_init_pc(struct ide_atapi_pc *pc) 345{ 346 memset(pc, 0, sizeof(*pc)); 347 pc->buf = pc->pc_buf; 348 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; 349} 350 351static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 352{ 353 idefloppy_init_pc(pc); 354 pc->c[0] = GPCMD_REQUEST_SENSE; 355 pc->c[4] = 255; 356 pc->req_xfer = 18; 357} 358 359/* 360 * Called when an error was detected during the last packet command. We queue a 361 * request sense packet command in the head of the request list. 362 */ 363static void idefloppy_retry_pc(ide_drive_t *drive) 364{ 365 struct ide_atapi_pc *pc; 366 struct request *rq; 367 368 (void)ide_read_error(drive); 369 pc = idefloppy_next_pc_storage(drive); 370 rq = idefloppy_next_rq_storage(drive); 371 idefloppy_create_request_sense_cmd(pc); 372 idefloppy_queue_pc_head(drive, pc, rq); 373} 374 375/* The usual interrupt handler called during a packet command. */ 376static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 377{ 378 idefloppy_floppy_t *floppy = drive->driver_data; 379 380 return ide_pc_intr(drive, floppy->pc, idefloppy_pc_intr, 381 IDEFLOPPY_WAIT_CMD, NULL, idefloppy_update_buffers, 382 idefloppy_retry_pc, NULL, ide_floppy_io_buffers); 383} 384 385/* 386 * What we have here is a classic case of a top half / bottom half interrupt 387 * service routine. In interrupt mode, the device sends an interrupt to signal 388 * that it is ready to receive a packet. However, we need to delay about 2-3 389 * ticks before issuing the packet or we gets in trouble. 390 */ 391static int idefloppy_transfer_pc(ide_drive_t *drive) 392{ 393 idefloppy_floppy_t *floppy = drive->driver_data; 394 395 /* Send the actual packet */ 396 drive->hwif->tp_ops->output_data(drive, NULL, floppy->pc->c, 12); 397 398 /* Timeout for the packet command */ 399 return IDEFLOPPY_WAIT_CMD; 400} 401 402 403/* 404 * Called as an interrupt (or directly). When the device says it's ready for a 405 * packet, we schedule the packet transfer to occur about 2-3 ticks later in 406 * transfer_pc. 407 */ 408static ide_startstop_t idefloppy_start_pc_transfer(ide_drive_t *drive) 409{ 410 idefloppy_floppy_t *floppy = drive->driver_data; 411 struct ide_atapi_pc *pc = floppy->pc; 412 ide_expiry_t *expiry; 413 unsigned int timeout; 414 415 /* 416 * The following delay solves a problem with ATAPI Zip 100 drives 417 * where the Busy flag was apparently being deasserted before the 418 * unit was ready to receive data. This was happening on a 419 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 420 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 421 * used until after the packet is moved in about 50 msec. 422 */ 423 if (drive->atapi_flags & IDE_AFLAG_ZIP_DRIVE) { 424 timeout = floppy->ticks; 425 expiry = &idefloppy_transfer_pc; 426 } else { 427 timeout = IDEFLOPPY_WAIT_CMD; 428 expiry = NULL; 429 } 430 431 return ide_transfer_pc(drive, pc, idefloppy_pc_intr, timeout, expiry); 432} 433 434static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 435 struct ide_atapi_pc *pc) 436{ 437 /* supress error messages resulting from Medium not present */ 438 if (floppy->sense_key == 0x02 && 439 floppy->asc == 0x3a && 440 floppy->ascq == 0x00) 441 return; 442 443 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 444 "asc = %2x, ascq = %2x\n", 445 floppy->drive->name, pc->c[0], floppy->sense_key, 446 floppy->asc, floppy->ascq); 447 448} 449 450static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 451 struct ide_atapi_pc *pc) 452{ 453 idefloppy_floppy_t *floppy = drive->driver_data; 454 455 if (floppy->failed_pc == NULL && 456 pc->c[0] != GPCMD_REQUEST_SENSE) 457 floppy->failed_pc = pc; 458 /* Set the current packet command */ 459 floppy->pc = pc; 460 461 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 462 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 463 ide_floppy_report_error(floppy, pc); 464 /* Giving up */ 465 pc->error = IDEFLOPPY_ERROR_GENERAL; 466 467 floppy->failed_pc = NULL; 468 drive->pc_callback(drive); 469 return ide_stopped; 470 } 471 472 debug_log("Retry number - %d\n", pc->retries); 473 474 pc->retries++; 475 476 return ide_issue_pc(drive, pc, idefloppy_start_pc_transfer, 477 IDEFLOPPY_WAIT_CMD, NULL); 478} 479 480static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent) 481{ 482 debug_log("creating prevent removal command, prevent = %d\n", prevent); 483 484 idefloppy_init_pc(pc); 485 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 486 pc->c[4] = prevent; 487} 488 489static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 490{ 491 idefloppy_init_pc(pc); 492 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 493 pc->c[7] = 255; 494 pc->c[8] = 255; 495 pc->req_xfer = 255; 496} 497 498static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, 499 int l, int flags) 500{ 501 idefloppy_init_pc(pc); 502 pc->c[0] = GPCMD_FORMAT_UNIT; 503 pc->c[1] = 0x17; 504 505 memset(pc->buf, 0, 12); 506 pc->buf[1] = 0xA2; 507 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 508 509 if (flags & 1) /* Verify bit on... */ 510 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ 511 pc->buf[3] = 8; 512 513 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); 514 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); 515 pc->buf_size = 12; 516 pc->flags |= PC_FLAG_WRITING; 517} 518 519/* A mode sense command is used to "sense" floppy parameters. */ 520static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, 521 u8 page_code, u8 type) 522{ 523 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 524 525 idefloppy_init_pc(pc); 526 pc->c[0] = GPCMD_MODE_SENSE_10; 527 pc->c[1] = 0; 528 pc->c[2] = page_code + (type << 6); 529 530 switch (page_code) { 531 case IDEFLOPPY_CAPABILITIES_PAGE: 532 length += 12; 533 break; 534 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 535 length += 32; 536 break; 537 default: 538 printk(KERN_ERR "ide-floppy: unsupported page code " 539 "in create_mode_sense_cmd\n"); 540 } 541 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 542 pc->req_xfer = length; 543} 544 545static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start) 546{ 547 idefloppy_init_pc(pc); 548 pc->c[0] = GPCMD_START_STOP_UNIT; 549 pc->c[4] = start; 550} 551 552static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 553 struct ide_atapi_pc *pc, struct request *rq, 554 unsigned long sector) 555{ 556 int block = sector / floppy->bs_factor; 557 int blocks = rq->nr_sectors / floppy->bs_factor; 558 int cmd = rq_data_dir(rq); 559 560 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 561 block, blocks); 562 563 idefloppy_init_pc(pc); 564 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 565 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 566 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 567 568 memcpy(rq->cmd, pc->c, 12); 569 570 pc->rq = rq; 571 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 572 if (rq->cmd_flags & REQ_RW) 573 pc->flags |= PC_FLAG_WRITING; 574 pc->buf = NULL; 575 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 576 pc->flags |= PC_FLAG_DMA_OK; 577} 578 579static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 580 struct ide_atapi_pc *pc, struct request *rq) 581{ 582 idefloppy_init_pc(pc); 583 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 584 pc->rq = rq; 585 pc->b_count = rq->data_len; 586 if (rq->data_len && rq_data_dir(rq) == WRITE) 587 pc->flags |= PC_FLAG_WRITING; 588 pc->buf = rq->data; 589 if (rq->bio) 590 pc->flags |= PC_FLAG_DMA_OK; 591 /* 592 * possibly problematic, doesn't look like ide-floppy correctly 593 * handled scattered requests if dma fails... 594 */ 595 pc->req_xfer = pc->buf_size = rq->data_len; 596} 597 598static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 599 struct request *rq, sector_t block_s) 600{ 601 idefloppy_floppy_t *floppy = drive->driver_data; 602 struct ide_atapi_pc *pc; 603 unsigned long block = (unsigned long)block_s; 604 605 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 606 rq->rq_disk ? rq->rq_disk->disk_name : "?", 607 rq->cmd_type, rq->errors); 608 debug_log("sector: %ld, nr_sectors: %ld, " 609 "current_nr_sectors: %d\n", (long)rq->sector, 610 rq->nr_sectors, rq->current_nr_sectors); 611 612 if (rq->errors >= ERROR_MAX) { 613 if (floppy->failed_pc) 614 ide_floppy_report_error(floppy, floppy->failed_pc); 615 else 616 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 617 drive->name); 618 idefloppy_end_request(drive, 0, 0); 619 return ide_stopped; 620 } 621 if (blk_fs_request(rq)) { 622 if (((long)rq->sector % floppy->bs_factor) || 623 (rq->nr_sectors % floppy->bs_factor)) { 624 printk(KERN_ERR "%s: unsupported r/w request size\n", 625 drive->name); 626 idefloppy_end_request(drive, 0, 0); 627 return ide_stopped; 628 } 629 pc = idefloppy_next_pc_storage(drive); 630 idefloppy_create_rw_cmd(floppy, pc, rq, block); 631 } else if (blk_special_request(rq)) { 632 pc = (struct ide_atapi_pc *) rq->buffer; 633 } else if (blk_pc_request(rq)) { 634 pc = idefloppy_next_pc_storage(drive); 635 idefloppy_blockpc_cmd(floppy, pc, rq); 636 } else { 637 blk_dump_rq_flags(rq, 638 "ide-floppy: unsupported command in queue"); 639 idefloppy_end_request(drive, 0, 0); 640 return ide_stopped; 641 } 642 643 pc->rq = rq; 644 645 return idefloppy_issue_pc(drive, pc); 646} 647 648/* 649 * Add a special packet command request to the tail of the request queue, 650 * and wait for it to be serviced. 651 */ 652static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) 653{ 654 struct ide_floppy_obj *floppy = drive->driver_data; 655 struct request *rq; 656 int error; 657 658 rq = blk_get_request(drive->queue, READ, __GFP_WAIT); 659 rq->buffer = (char *) pc; 660 rq->cmd_type = REQ_TYPE_SPECIAL; 661 memcpy(rq->cmd, pc->c, 12); 662 error = blk_execute_rq(drive->queue, floppy->disk, rq, 0); 663 blk_put_request(rq); 664 665 return error; 666} 667 668/* 669 * Look at the flexible disk page parameters. We ignore the CHS capacity 670 * parameters and use the LBA parameters instead. 671 */ 672static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 673{ 674 idefloppy_floppy_t *floppy = drive->driver_data; 675 struct ide_atapi_pc pc; 676 u8 *page; 677 int capacity, lba_capacity; 678 u16 transfer_rate, sector_size, cyls, rpm; 679 u8 heads, sectors; 680 681 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 682 MODE_SENSE_CURRENT); 683 684 if (idefloppy_queue_pc_tail(drive, &pc)) { 685 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 686 " parameters\n"); 687 return 1; 688 } 689 floppy->wp = !!(pc.buf[3] & 0x80); 690 set_disk_ro(floppy->disk, floppy->wp); 691 page = &pc.buf[8]; 692 693 transfer_rate = be16_to_cpup((__be16 *)&pc.buf[8 + 2]); 694 sector_size = be16_to_cpup((__be16 *)&pc.buf[8 + 6]); 695 cyls = be16_to_cpup((__be16 *)&pc.buf[8 + 8]); 696 rpm = be16_to_cpup((__be16 *)&pc.buf[8 + 28]); 697 heads = pc.buf[8 + 4]; 698 sectors = pc.buf[8 + 5]; 699 700 capacity = cyls * heads * sectors * sector_size; 701 702 if (memcmp(page, &floppy->flexible_disk_page, 32)) 703 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 704 "%d sector size, %d rpm\n", 705 drive->name, capacity / 1024, cyls, heads, 706 sectors, transfer_rate / 8, sector_size, rpm); 707 708 memcpy(&floppy->flexible_disk_page, page, 32); 709 drive->bios_cyl = cyls; 710 drive->bios_head = heads; 711 drive->bios_sect = sectors; 712 lba_capacity = floppy->blocks * floppy->block_size; 713 714 if (capacity < lba_capacity) { 715 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 716 "bytes, but the drive only handles %d\n", 717 drive->name, lba_capacity, capacity); 718 floppy->blocks = floppy->block_size ? 719 capacity / floppy->block_size : 0; 720 } 721 return 0; 722} 723 724static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 725{ 726 idefloppy_floppy_t *floppy = drive->driver_data; 727 struct ide_atapi_pc pc; 728 729 floppy->srfp = 0; 730 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 731 MODE_SENSE_CURRENT); 732 733 pc.flags |= PC_FLAG_SUPPRESS_ERROR; 734 if (idefloppy_queue_pc_tail(drive, &pc)) 735 return 1; 736 737 floppy->srfp = pc.buf[8 + 2] & 0x40; 738 return (0); 739} 740 741/* 742 * Determine if a media is present in the floppy drive, and if so, its LBA 743 * capacity. 744 */ 745static int ide_floppy_get_capacity(ide_drive_t *drive) 746{ 747 idefloppy_floppy_t *floppy = drive->driver_data; 748 struct ide_atapi_pc pc; 749 u8 *cap_desc; 750 u8 header_len, desc_cnt; 751 int i, rc = 1, blocks, length; 752 753 drive->bios_cyl = 0; 754 drive->bios_head = drive->bios_sect = 0; 755 floppy->blocks = 0; 756 floppy->bs_factor = 1; 757 set_capacity(floppy->disk, 0); 758 759 idefloppy_create_read_capacity_cmd(&pc); 760 if (idefloppy_queue_pc_tail(drive, &pc)) { 761 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 762 return 1; 763 } 764 header_len = pc.buf[3]; 765 cap_desc = &pc.buf[4]; 766 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 767 768 for (i = 0; i < desc_cnt; i++) { 769 unsigned int desc_start = 4 + i*8; 770 771 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); 772 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); 773 774 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 775 i, blocks * length / 1024, blocks, length); 776 777 if (i) 778 continue; 779 /* 780 * the code below is valid only for the 1st descriptor, ie i=0 781 */ 782 783 switch (pc.buf[desc_start + 4] & 0x03) { 784 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 785 case CAPACITY_UNFORMATTED: 786 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 787 /* 788 * If it is not a clik drive, break out 789 * (maintains previous driver behaviour) 790 */ 791 break; 792 case CAPACITY_CURRENT: 793 /* Normal Zip/LS-120 disks */ 794 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 795 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 796 "sector size\n", drive->name, 797 blocks * length / 1024, blocks, length); 798 memcpy(&floppy->cap_desc, cap_desc, 8); 799 800 if (!length || length % 512) { 801 printk(KERN_NOTICE "%s: %d bytes block size " 802 "not supported\n", drive->name, length); 803 } else { 804 floppy->blocks = blocks; 805 floppy->block_size = length; 806 floppy->bs_factor = length / 512; 807 if (floppy->bs_factor != 1) 808 printk(KERN_NOTICE "%s: warning: non " 809 "512 bytes block size not " 810 "fully supported\n", 811 drive->name); 812 rc = 0; 813 } 814 break; 815 case CAPACITY_NO_CARTRIDGE: 816 /* 817 * This is a KERN_ERR so it appears on screen 818 * for the user to see 819 */ 820 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 821 break; 822 case CAPACITY_INVALID: 823 printk(KERN_ERR "%s: Invalid capacity for disk " 824 "in drive\n", drive->name); 825 break; 826 } 827 debug_log("Descriptor 0 Code: %d\n", 828 pc.buf[desc_start + 4] & 0x03); 829 } 830 831 /* Clik! disk does not support get_flexible_disk_page */ 832 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) 833 (void) ide_floppy_get_flexible_disk_page(drive); 834 835 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 836 return rc; 837} 838 839/* 840 * Obtain the list of formattable capacities. 841 * Very similar to ide_floppy_get_capacity, except that we push the capacity 842 * descriptors to userland, instead of our own structures. 843 * 844 * Userland gives us the following structure: 845 * 846 * struct idefloppy_format_capacities { 847 * int nformats; 848 * struct { 849 * int nblocks; 850 * int blocksize; 851 * } formats[]; 852 * }; 853 * 854 * userland initializes nformats to the number of allocated formats[] records. 855 * On exit we set nformats to the number of records we've actually initialized. 856 */ 857 858static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 859{ 860 struct ide_atapi_pc pc; 861 u8 header_len, desc_cnt; 862 int i, blocks, length, u_array_size, u_index; 863 int __user *argp; 864 865 if (get_user(u_array_size, arg)) 866 return (-EFAULT); 867 868 if (u_array_size <= 0) 869 return (-EINVAL); 870 871 idefloppy_create_read_capacity_cmd(&pc); 872 if (idefloppy_queue_pc_tail(drive, &pc)) { 873 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 874 return (-EIO); 875 } 876 header_len = pc.buf[3]; 877 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 878 879 u_index = 0; 880 argp = arg + 1; 881 882 /* 883 * We always skip the first capacity descriptor. That's the current 884 * capacity. We are interested in the remaining descriptors, the 885 * formattable capacities. 886 */ 887 for (i = 1; i < desc_cnt; i++) { 888 unsigned int desc_start = 4 + i*8; 889 890 if (u_index >= u_array_size) 891 break; /* User-supplied buffer too small */ 892 893 blocks = be32_to_cpup((__be32 *)&pc.buf[desc_start]); 894 length = be16_to_cpup((__be16 *)&pc.buf[desc_start + 6]); 895 896 if (put_user(blocks, argp)) 897 return(-EFAULT); 898 ++argp; 899 900 if (put_user(length, argp)) 901 return (-EFAULT); 902 ++argp; 903 904 ++u_index; 905 } 906 907 if (put_user(u_index, arg)) 908 return (-EFAULT); 909 return (0); 910} 911 912/* 913 * Get ATAPI_FORMAT_UNIT progress indication. 914 * 915 * Userland gives a pointer to an int. The int is set to a progress 916 * indicator 0-65536, with 65536=100%. 917 * 918 * If the drive does not support format progress indication, we just check 919 * the dsc bit, and return either 0 or 65536. 920 */ 921 922static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 923{ 924 idefloppy_floppy_t *floppy = drive->driver_data; 925 struct ide_atapi_pc pc; 926 int progress_indication = 0x10000; 927 928 if (floppy->srfp) { 929 idefloppy_create_request_sense_cmd(&pc); 930 if (idefloppy_queue_pc_tail(drive, &pc)) 931 return (-EIO); 932 933 if (floppy->sense_key == 2 && 934 floppy->asc == 4 && 935 floppy->ascq == 4) 936 progress_indication = floppy->progress_indication; 937 938 /* Else assume format_unit has finished, and we're at 0x10000 */ 939 } else { 940 ide_hwif_t *hwif = drive->hwif; 941 unsigned long flags; 942 u8 stat; 943 944 local_irq_save(flags); 945 stat = hwif->tp_ops->read_status(hwif); 946 local_irq_restore(flags); 947 948 progress_indication = ((stat & ATA_DSC) == 0) ? 0 : 0x10000; 949 } 950 if (put_user(progress_indication, arg)) 951 return (-EFAULT); 952 953 return (0); 954} 955 956static sector_t idefloppy_capacity(ide_drive_t *drive) 957{ 958 idefloppy_floppy_t *floppy = drive->driver_data; 959 unsigned long capacity = floppy->blocks * floppy->bs_factor; 960 961 return capacity; 962} 963 964/* 965 * Check whether we can support a drive, based on the ATAPI IDENTIFY command 966 * results. 967 */ 968static int idefloppy_identify_device(ide_drive_t *drive, u16 *id) 969{ 970 u8 gcw[2]; 971 u8 device_type, protocol, removable, drq_type, packet_size; 972 973 *((u16 *)&gcw) = id[ATA_ID_CONFIG]; 974 975 device_type = gcw[1] & 0x1F; 976 removable = (gcw[0] & 0x80) >> 7; 977 protocol = (gcw[1] & 0xC0) >> 6; 978 drq_type = (gcw[0] & 0x60) >> 5; 979 packet_size = gcw[0] & 0x03; 980 981#ifdef CONFIG_PPC 982 /* kludge for Apple PowerBook internal zip */ 983 if (device_type == 5 && 984 !strstr((char *)&id[ATA_ID_PROD], "CD-ROM") && 985 strstr((char *)&id[ATA_ID_PROD], "ZIP")) 986 device_type = 0; 987#endif 988 989 if (protocol != 2) 990 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", 991 protocol); 992 else if (device_type != 0) 993 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " 994 "to floppy\n", device_type); 995 else if (!removable) 996 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 997 else if (drq_type == 3) 998 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " 999 "supported\n", drq_type); 1000 else if (packet_size != 0) 1001 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " 1002 "bytes\n", packet_size); 1003 else 1004 return 1; 1005 return 0; 1006} 1007 1008#ifdef CONFIG_IDE_PROC_FS 1009static void idefloppy_add_settings(ide_drive_t *drive) 1010{ 1011 idefloppy_floppy_t *floppy = drive->driver_data; 1012 1013 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, 1014 &drive->bios_cyl, NULL); 1015 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1016 &drive->bios_head, NULL); 1017 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, 1018 &drive->bios_sect, NULL); 1019 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1020 &floppy->ticks, NULL); 1021} 1022#else 1023static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1024#endif 1025 1026static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 1027{ 1028 u16 *id = drive->id; 1029 u8 gcw[2]; 1030 1031 *((u16 *)&gcw) = id[ATA_ID_CONFIG]; 1032 floppy->pc = floppy->pc_stack; 1033 drive->pc_callback = ide_floppy_callback; 1034 1035 if (((gcw[0] & 0x60) >> 5) == 1) 1036 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; 1037 /* 1038 * We used to check revisions here. At this point however I'm giving up. 1039 * Just assume they are all broken, its easier. 1040 * 1041 * The actual reason for the workarounds was likely a driver bug after 1042 * all rather than a firmware bug, and the workaround below used to hide 1043 * it. It should be fixed as of version 1.9, but to be on the safe side 1044 * we'll leave the limitation below for the 2.2.x tree. 1045 */ 1046 if (!strncmp((char *)&id[ATA_ID_PROD], "IOMEGA ZIP 100 ATAPI", 20)) { 1047 drive->atapi_flags |= IDE_AFLAG_ZIP_DRIVE; 1048 /* This value will be visible in the /proc/ide/hdx/settings */ 1049 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1050 blk_queue_max_sectors(drive->queue, 64); 1051 } 1052 1053 /* 1054 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 1055 * nasty clicking noises without it, so please don't remove this. 1056 */ 1057 if (strncmp((char *)&id[ATA_ID_PROD], "IOMEGA Clik!", 11) == 0) { 1058 blk_queue_max_sectors(drive->queue, 64); 1059 drive->atapi_flags |= IDE_AFLAG_CLIK_DRIVE; 1060 } 1061 1062 (void) ide_floppy_get_capacity(drive); 1063 idefloppy_add_settings(drive); 1064} 1065 1066static void ide_floppy_remove(ide_drive_t *drive) 1067{ 1068 idefloppy_floppy_t *floppy = drive->driver_data; 1069 struct gendisk *g = floppy->disk; 1070 1071 ide_proc_unregister_driver(drive, floppy->driver); 1072 1073 del_gendisk(g); 1074 1075 ide_floppy_put(floppy); 1076} 1077 1078static void idefloppy_cleanup_obj(struct kref *kref) 1079{ 1080 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1081 ide_drive_t *drive = floppy->drive; 1082 struct gendisk *g = floppy->disk; 1083 1084 drive->driver_data = NULL; 1085 g->private_data = NULL; 1086 put_disk(g); 1087 kfree(floppy); 1088} 1089 1090#ifdef CONFIG_IDE_PROC_FS 1091static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 1092 int count, int *eof, void *data) 1093{ 1094 ide_drive_t*drive = (ide_drive_t *)data; 1095 int len; 1096 1097 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 1098 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1099} 1100 1101static ide_proc_entry_t idefloppy_proc[] = { 1102 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1103 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1104 { NULL, 0, NULL, NULL } 1105}; 1106#endif /* CONFIG_IDE_PROC_FS */ 1107 1108static int ide_floppy_probe(ide_drive_t *); 1109 1110static ide_driver_t idefloppy_driver = { 1111 .gen_driver = { 1112 .owner = THIS_MODULE, 1113 .name = "ide-floppy", 1114 .bus = &ide_bus_type, 1115 }, 1116 .probe = ide_floppy_probe, 1117 .remove = ide_floppy_remove, 1118 .version = IDEFLOPPY_VERSION, 1119 .media = ide_floppy, 1120 .supports_dsc_overlap = 0, 1121 .do_request = idefloppy_do_request, 1122 .end_request = idefloppy_end_request, 1123 .error = __ide_error, 1124#ifdef CONFIG_IDE_PROC_FS 1125 .proc = idefloppy_proc, 1126#endif 1127}; 1128 1129static int idefloppy_open(struct inode *inode, struct file *filp) 1130{ 1131 struct gendisk *disk = inode->i_bdev->bd_disk; 1132 struct ide_floppy_obj *floppy; 1133 ide_drive_t *drive; 1134 struct ide_atapi_pc pc; 1135 int ret = 0; 1136 1137 debug_log("Reached %s\n", __func__); 1138 1139 floppy = ide_floppy_get(disk); 1140 if (!floppy) 1141 return -ENXIO; 1142 1143 drive = floppy->drive; 1144 1145 floppy->openers++; 1146 1147 if (floppy->openers == 1) { 1148 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 1149 /* Just in case */ 1150 1151 idefloppy_init_pc(&pc); 1152 pc.c[0] = GPCMD_TEST_UNIT_READY; 1153 1154 if (idefloppy_queue_pc_tail(drive, &pc)) { 1155 idefloppy_create_start_stop_cmd(&pc, 1); 1156 (void) idefloppy_queue_pc_tail(drive, &pc); 1157 } 1158 1159 if (ide_floppy_get_capacity(drive) 1160 && (filp->f_flags & O_NDELAY) == 0 1161 /* 1162 * Allow O_NDELAY to open a drive without a disk, or with an 1163 * unreadable disk, so that we can get the format capacity 1164 * of the drive or begin the format - Sam 1165 */ 1166 ) { 1167 ret = -EIO; 1168 goto out_put_floppy; 1169 } 1170 1171 if (floppy->wp && (filp->f_mode & 2)) { 1172 ret = -EROFS; 1173 goto out_put_floppy; 1174 } 1175 drive->atapi_flags |= IDE_AFLAG_MEDIA_CHANGED; 1176 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1177 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) { 1178 idefloppy_create_prevent_cmd(&pc, 1); 1179 (void) idefloppy_queue_pc_tail(drive, &pc); 1180 } 1181 check_disk_change(inode->i_bdev); 1182 } else if (drive->atapi_flags & IDE_AFLAG_FORMAT_IN_PROGRESS) { 1183 ret = -EBUSY; 1184 goto out_put_floppy; 1185 } 1186 return 0; 1187 1188out_put_floppy: 1189 floppy->openers--; 1190 ide_floppy_put(floppy); 1191 return ret; 1192} 1193 1194static int idefloppy_release(struct inode *inode, struct file *filp) 1195{ 1196 struct gendisk *disk = inode->i_bdev->bd_disk; 1197 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1198 ide_drive_t *drive = floppy->drive; 1199 struct ide_atapi_pc pc; 1200 1201 debug_log("Reached %s\n", __func__); 1202 1203 if (floppy->openers == 1) { 1204 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1205 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) { 1206 idefloppy_create_prevent_cmd(&pc, 0); 1207 (void) idefloppy_queue_pc_tail(drive, &pc); 1208 } 1209 1210 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 1211 } 1212 1213 floppy->openers--; 1214 1215 ide_floppy_put(floppy); 1216 1217 return 0; 1218} 1219 1220static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1221{ 1222 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1223 ide_drive_t *drive = floppy->drive; 1224 1225 geo->heads = drive->bios_head; 1226 geo->sectors = drive->bios_sect; 1227 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1228 return 0; 1229} 1230 1231static int ide_floppy_lockdoor(ide_drive_t *drive, struct ide_atapi_pc *pc, 1232 unsigned long arg, unsigned int cmd) 1233{ 1234 idefloppy_floppy_t *floppy = drive->driver_data; 1235 1236 if (floppy->openers > 1) 1237 return -EBUSY; 1238 1239 /* The IOMEGA Clik! Drive doesn't support this command - 1240 * no room for an eject mechanism */ 1241 if (!(drive->atapi_flags & IDE_AFLAG_CLIK_DRIVE)) { 1242 int prevent = arg ? 1 : 0; 1243 1244 if (cmd == CDROMEJECT) 1245 prevent = 0; 1246 1247 idefloppy_create_prevent_cmd(pc, prevent); 1248 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1249 } 1250 1251 if (cmd == CDROMEJECT) { 1252 idefloppy_create_start_stop_cmd(pc, 2); 1253 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1254 } 1255 1256 return 0; 1257} 1258 1259static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1260 int __user *arg) 1261{ 1262 struct ide_atapi_pc pc; 1263 ide_drive_t *drive = floppy->drive; 1264 int blocks, length, flags, err = 0; 1265 1266 if (floppy->openers > 1) { 1267 /* Don't format if someone is using the disk */ 1268 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 1269 return -EBUSY; 1270 } 1271 1272 drive->atapi_flags |= IDE_AFLAG_FORMAT_IN_PROGRESS; 1273 1274 /* 1275 * Send ATAPI_FORMAT_UNIT to the drive. 1276 * 1277 * Userland gives us the following structure: 1278 * 1279 * struct idefloppy_format_command { 1280 * int nblocks; 1281 * int blocksize; 1282 * int flags; 1283 * } ; 1284 * 1285 * flags is a bitmask, currently, the only defined flag is: 1286 * 1287 * 0x01 - verify media after format. 1288 */ 1289 if (get_user(blocks, arg) || 1290 get_user(length, arg+1) || 1291 get_user(flags, arg+2)) { 1292 err = -EFAULT; 1293 goto out; 1294 } 1295 1296 (void) idefloppy_get_sfrp_bit(drive); 1297 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1298 1299 if (idefloppy_queue_pc_tail(drive, &pc)) 1300 err = -EIO; 1301 1302out: 1303 if (err) 1304 drive->atapi_flags &= ~IDE_AFLAG_FORMAT_IN_PROGRESS; 1305 return err; 1306} 1307 1308 1309static int idefloppy_ioctl(struct inode *inode, struct file *file, 1310 unsigned int cmd, unsigned long arg) 1311{ 1312 struct block_device *bdev = inode->i_bdev; 1313 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1314 ide_drive_t *drive = floppy->drive; 1315 struct ide_atapi_pc pc; 1316 void __user *argp = (void __user *)arg; 1317 int err; 1318 1319 switch (cmd) { 1320 case CDROMEJECT: 1321 /* fall through */ 1322 case CDROM_LOCKDOOR: 1323 return ide_floppy_lockdoor(drive, &pc, arg, cmd); 1324 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1325 return 0; 1326 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1327 return ide_floppy_get_format_capacities(drive, argp); 1328 case IDEFLOPPY_IOCTL_FORMAT_START: 1329 if (!(file->f_mode & 2)) 1330 return -EPERM; 1331 1332 return ide_floppy_format_unit(floppy, (int __user *)arg); 1333 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1334 return idefloppy_get_format_progress(drive, argp); 1335 } 1336 1337 /* 1338 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1339 * and CDROM_SEND_PACKET (legacy) ioctls 1340 */ 1341 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1342 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1343 bdev->bd_disk, cmd, argp); 1344 else 1345 err = -ENOTTY; 1346 1347 if (err == -ENOTTY) 1348 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1349 1350 return err; 1351} 1352 1353static int idefloppy_media_changed(struct gendisk *disk) 1354{ 1355 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1356 ide_drive_t *drive = floppy->drive; 1357 int ret; 1358 1359 /* do not scan partitions twice if this is a removable device */ 1360 if (drive->attach) { 1361 drive->attach = 0; 1362 return 0; 1363 } 1364 ret = !!(drive->atapi_flags & IDE_AFLAG_MEDIA_CHANGED); 1365 drive->atapi_flags &= ~IDE_AFLAG_MEDIA_CHANGED; 1366 return ret; 1367} 1368 1369static int idefloppy_revalidate_disk(struct gendisk *disk) 1370{ 1371 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1372 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1373 return 0; 1374} 1375 1376static struct block_device_operations idefloppy_ops = { 1377 .owner = THIS_MODULE, 1378 .open = idefloppy_open, 1379 .release = idefloppy_release, 1380 .ioctl = idefloppy_ioctl, 1381 .getgeo = idefloppy_getgeo, 1382 .media_changed = idefloppy_media_changed, 1383 .revalidate_disk = idefloppy_revalidate_disk 1384}; 1385 1386static int ide_floppy_probe(ide_drive_t *drive) 1387{ 1388 idefloppy_floppy_t *floppy; 1389 struct gendisk *g; 1390 1391 if (!strstr("ide-floppy", drive->driver_req)) 1392 goto failed; 1393 1394 if (drive->media != ide_floppy) 1395 goto failed; 1396 1397 if (!idefloppy_identify_device(drive, drive->id)) { 1398 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 1399 " of ide-floppy\n", drive->name); 1400 goto failed; 1401 } 1402 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 1403 if (!floppy) { 1404 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 1405 " structure\n", drive->name); 1406 goto failed; 1407 } 1408 1409 g = alloc_disk(1 << PARTN_BITS); 1410 if (!g) 1411 goto out_free_floppy; 1412 1413 ide_init_disk(g, drive); 1414 1415 ide_proc_register_driver(drive, &idefloppy_driver); 1416 1417 kref_init(&floppy->kref); 1418 1419 floppy->drive = drive; 1420 floppy->driver = &idefloppy_driver; 1421 floppy->disk = g; 1422 1423 g->private_data = &floppy->driver; 1424 1425 drive->driver_data = floppy; 1426 1427 idefloppy_setup(drive, floppy); 1428 1429 g->minors = 1 << PARTN_BITS; 1430 g->driverfs_dev = &drive->gendev; 1431 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1432 g->fops = &idefloppy_ops; 1433 drive->attach = 1; 1434 add_disk(g); 1435 return 0; 1436 1437out_free_floppy: 1438 kfree(floppy); 1439failed: 1440 return -ENODEV; 1441} 1442 1443static void __exit idefloppy_exit(void) 1444{ 1445 driver_unregister(&idefloppy_driver.gen_driver); 1446} 1447 1448static int __init idefloppy_init(void) 1449{ 1450 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1451 return driver_register(&idefloppy_driver.gen_driver); 1452} 1453 1454MODULE_ALIAS("ide:*m-floppy*"); 1455module_init(idefloppy_init); 1456module_exit(idefloppy_exit); 1457MODULE_LICENSE("GPL"); 1458MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1459 1460