ide-floppy.c revision 3910dde6410e742f8bd3f516ee9b1a7114abbad0
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 /* Status/Action flags */ 129 unsigned long flags; 130} idefloppy_floppy_t; 131 132#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 133 134/* Floppy flag bits values. */ 135enum { 136 /* DRQ interrupt device */ 137 IDEFLOPPY_FLAG_DRQ_INTERRUPT = (1 << 0), 138 /* Media may have changed */ 139 IDEFLOPPY_FLAG_MEDIA_CHANGED = (1 << 1), 140 /* Format in progress */ 141 IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS = (1 << 2), 142 /* Avoid commands not supported in Clik drive */ 143 IDEFLOPPY_FLAG_CLIK_DRIVE = (1 << 3), 144 /* Requires BH algorithm for packets */ 145 IDEFLOPPY_FLAG_ZIP_DRIVE = (1 << 4), 146}; 147 148/* Defines for the MODE SENSE command */ 149#define MODE_SENSE_CURRENT 0x00 150#define MODE_SENSE_CHANGEABLE 0x01 151#define MODE_SENSE_DEFAULT 0x02 152#define MODE_SENSE_SAVED 0x03 153 154/* IOCTLs used in low-level formatting. */ 155#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 156#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 157#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 158#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 159 160/* Error code returned in rq->errors to the higher part of the driver. */ 161#define IDEFLOPPY_ERROR_GENERAL 101 162 163/* 164 * Pages of the SELECT SENSE / MODE SENSE packet commands. 165 * See SFF-8070i spec. 166 */ 167#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 168#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 169 170static DEFINE_MUTEX(idefloppy_ref_mutex); 171 172#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 173 174#define ide_floppy_g(disk) \ 175 container_of((disk)->private_data, struct ide_floppy_obj, driver) 176 177static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 178{ 179 struct ide_floppy_obj *floppy = NULL; 180 181 mutex_lock(&idefloppy_ref_mutex); 182 floppy = ide_floppy_g(disk); 183 if (floppy) 184 kref_get(&floppy->kref); 185 mutex_unlock(&idefloppy_ref_mutex); 186 return floppy; 187} 188 189static void idefloppy_cleanup_obj(struct kref *); 190 191static void ide_floppy_put(struct ide_floppy_obj *floppy) 192{ 193 mutex_lock(&idefloppy_ref_mutex); 194 kref_put(&floppy->kref, idefloppy_cleanup_obj); 195 mutex_unlock(&idefloppy_ref_mutex); 196} 197 198/* 199 * Used to finish servicing a request. For read/write requests, we will call 200 * ide_end_request to pass to the next buffer. 201 */ 202static int idefloppy_end_request(ide_drive_t *drive, int uptodate, int nsecs) 203{ 204 idefloppy_floppy_t *floppy = drive->driver_data; 205 struct request *rq = HWGROUP(drive)->rq; 206 int error; 207 208 debug_log("Reached %s\n", __func__); 209 210 switch (uptodate) { 211 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 212 case 1: error = 0; break; 213 default: error = uptodate; 214 } 215 if (error) 216 floppy->failed_pc = NULL; 217 /* Why does this happen? */ 218 if (!rq) 219 return 0; 220 if (!blk_special_request(rq)) { 221 /* our real local end request function */ 222 ide_end_request(drive, uptodate, nsecs); 223 return 0; 224 } 225 rq->errors = error; 226 /* fixme: need to move this local also */ 227 ide_end_drive_cmd(drive, 0, 0); 228 return 0; 229} 230 231static void ide_floppy_io_buffers(ide_drive_t *drive, struct ide_atapi_pc *pc, 232 unsigned int bcount, int direction) 233{ 234 ide_hwif_t *hwif = drive->hwif; 235 struct request *rq = pc->rq; 236 struct req_iterator iter; 237 struct bio_vec *bvec; 238 unsigned long flags; 239 int count, done = 0; 240 char *data; 241 242 rq_for_each_segment(bvec, rq, iter) { 243 if (!bcount) 244 break; 245 246 count = min(bvec->bv_len, bcount); 247 248 data = bvec_kmap_irq(bvec, &flags); 249 if (direction) 250 hwif->output_data(drive, NULL, data, count); 251 else 252 hwif->input_data(drive, NULL, data, count); 253 bvec_kunmap_irq(data, &flags); 254 255 bcount -= count; 256 pc->b_count += count; 257 done += count; 258 } 259 260 idefloppy_end_request(drive, 1, done >> 9); 261 262 if (bcount) { 263 printk(KERN_ERR "%s: leftover data in %s, bcount == %d\n", 264 drive->name, __func__, bcount); 265 if (direction) 266 ide_atapi_write_zeros(drive, bcount); 267 else 268 ide_atapi_discard_data(drive, bcount); 269 } 270} 271 272static void idefloppy_update_buffers(ide_drive_t *drive, 273 struct ide_atapi_pc *pc) 274{ 275 struct request *rq = pc->rq; 276 struct bio *bio = rq->bio; 277 278 while ((bio = rq->bio) != NULL) 279 idefloppy_end_request(drive, 1, 0); 280} 281 282/* 283 * Generate a new packet command request in front of the request queue, before 284 * the current request so that it will be processed immediately, on the next 285 * pass through the driver. 286 */ 287static void idefloppy_queue_pc_head(ide_drive_t *drive, struct ide_atapi_pc *pc, 288 struct request *rq) 289{ 290 struct ide_floppy_obj *floppy = drive->driver_data; 291 292 ide_init_drive_cmd(rq); 293 rq->buffer = (char *) pc; 294 rq->cmd_type = REQ_TYPE_SPECIAL; 295 rq->rq_disk = floppy->disk; 296 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 297} 298 299static struct ide_atapi_pc *idefloppy_next_pc_storage(ide_drive_t *drive) 300{ 301 idefloppy_floppy_t *floppy = drive->driver_data; 302 303 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 304 floppy->pc_stack_index = 0; 305 return (&floppy->pc_stack[floppy->pc_stack_index++]); 306} 307 308static struct request *idefloppy_next_rq_storage(ide_drive_t *drive) 309{ 310 idefloppy_floppy_t *floppy = drive->driver_data; 311 312 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 313 floppy->rq_stack_index = 0; 314 return (&floppy->rq_stack[floppy->rq_stack_index++]); 315} 316 317static void idefloppy_request_sense_callback(ide_drive_t *drive) 318{ 319 idefloppy_floppy_t *floppy = drive->driver_data; 320 u8 *buf = floppy->pc->buf; 321 322 debug_log("Reached %s\n", __func__); 323 324 if (!floppy->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, sense key = %x, asc = %x," 333 " ascq = %x\n", 334 floppy->failed_pc->c[0], 335 floppy->sense_key, 336 floppy->asc, 337 floppy->ascq); 338 else 339 debug_log("sense key = %x, asc = %x, ascq = %x\n", 340 floppy->sense_key, 341 floppy->asc, 342 floppy->ascq); 343 344 345 idefloppy_end_request(drive, 1, 0); 346 } else { 347 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 348 " request!\n"); 349 idefloppy_end_request(drive, 0, 0); 350 } 351} 352 353/* General packet command callback function. */ 354static void idefloppy_pc_callback(ide_drive_t *drive) 355{ 356 idefloppy_floppy_t *floppy = drive->driver_data; 357 358 debug_log("Reached %s\n", __func__); 359 360 idefloppy_end_request(drive, floppy->pc->error ? 0 : 1, 0); 361} 362 363static void idefloppy_init_pc(struct ide_atapi_pc *pc) 364{ 365 memset(pc->c, 0, 12); 366 pc->retries = 0; 367 pc->flags = 0; 368 pc->req_xfer = 0; 369 pc->buf = pc->pc_buf; 370 pc->buf_size = IDEFLOPPY_PC_BUFFER_SIZE; 371 pc->idefloppy_callback = &idefloppy_pc_callback; 372} 373 374static void idefloppy_create_request_sense_cmd(struct ide_atapi_pc *pc) 375{ 376 idefloppy_init_pc(pc); 377 pc->c[0] = GPCMD_REQUEST_SENSE; 378 pc->c[4] = 255; 379 pc->req_xfer = 18; 380 pc->idefloppy_callback = &idefloppy_request_sense_callback; 381} 382 383/* 384 * Called when an error was detected during the last packet command. We queue a 385 * request sense packet command in the head of the request list. 386 */ 387static void idefloppy_retry_pc(ide_drive_t *drive) 388{ 389 struct ide_atapi_pc *pc; 390 struct request *rq; 391 392 (void)ide_read_error(drive); 393 pc = idefloppy_next_pc_storage(drive); 394 rq = idefloppy_next_rq_storage(drive); 395 idefloppy_create_request_sense_cmd(pc); 396 idefloppy_queue_pc_head(drive, pc, rq); 397} 398 399/* The usual interrupt handler called during a packet command. */ 400static ide_startstop_t idefloppy_pc_intr(ide_drive_t *drive) 401{ 402 idefloppy_floppy_t *floppy = drive->driver_data; 403 ide_hwif_t *hwif = drive->hwif; 404 struct ide_atapi_pc *pc = floppy->pc; 405 struct request *rq = pc->rq; 406 xfer_func_t *xferfunc; 407 unsigned int temp; 408 int dma_error = 0; 409 u16 bcount; 410 u8 stat, ireason; 411 412 debug_log("Reached %s interrupt handler\n", __func__); 413 414 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 415 dma_error = hwif->dma_ops->dma_end(drive); 416 if (dma_error) { 417 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 418 rq_data_dir(rq) ? "write" : "read"); 419 pc->flags |= PC_FLAG_DMA_ERROR; 420 } else { 421 pc->xferred = pc->req_xfer; 422 idefloppy_update_buffers(drive, pc); 423 } 424 debug_log("DMA finished\n"); 425 } 426 427 /* Clear the interrupt */ 428 stat = ide_read_status(drive); 429 430 /* No more interrupts */ 431 if ((stat & DRQ_STAT) == 0) { 432 debug_log("Packet command completed, %d bytes transferred\n", 433 pc->xferred); 434 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 435 436 local_irq_enable_in_hardirq(); 437 438 if ((stat & ERR_STAT) || (pc->flags & PC_FLAG_DMA_ERROR)) { 439 /* Error detected */ 440 debug_log("%s: I/O error\n", drive->name); 441 rq->errors++; 442 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 443 printk(KERN_ERR "ide-floppy: I/O error in " 444 "request sense command\n"); 445 return ide_do_reset(drive); 446 } 447 /* Retry operation */ 448 idefloppy_retry_pc(drive); 449 /* queued, but not started */ 450 return ide_stopped; 451 } 452 pc->error = 0; 453 if (floppy->failed_pc == pc) 454 floppy->failed_pc = NULL; 455 /* Command finished - Call the callback function */ 456 pc->idefloppy_callback(drive); 457 return ide_stopped; 458 } 459 460 if (pc->flags & PC_FLAG_DMA_IN_PROGRESS) { 461 pc->flags &= ~PC_FLAG_DMA_IN_PROGRESS; 462 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 463 "more interrupts in DMA mode\n"); 464 ide_dma_off(drive); 465 return ide_do_reset(drive); 466 } 467 468 /* Get the number of bytes to transfer */ 469 bcount = (hwif->INB(hwif->io_ports.lbah_addr) << 8) | 470 hwif->INB(hwif->io_ports.lbam_addr); 471 /* on this interrupt */ 472 ireason = hwif->INB(hwif->io_ports.nsect_addr); 473 474 if (ireason & CD) { 475 printk(KERN_ERR "ide-floppy: CoD != 0 in %s\n", __func__); 476 return ide_do_reset(drive); 477 } 478 if (((ireason & IO) == IO) == !!(pc->flags & PC_FLAG_WRITING)) { 479 /* Hopefully, we will never get here */ 480 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 481 (ireason & IO) ? "Write" : "Read"); 482 printk(KERN_ERR "but the floppy wants us to %s !\n", 483 (ireason & IO) ? "Read" : "Write"); 484 return ide_do_reset(drive); 485 } 486 if (!(pc->flags & PC_FLAG_WRITING)) { 487 /* Reading - Check that we have enough space */ 488 temp = pc->xferred + bcount; 489 if (temp > pc->req_xfer) { 490 if (temp > pc->buf_size) { 491 printk(KERN_ERR "ide-floppy: The floppy wants " 492 "to send us more data than expected " 493 "- discarding data\n"); 494 ide_atapi_discard_data(drive, bcount); 495 496 ide_set_handler(drive, 497 &idefloppy_pc_intr, 498 IDEFLOPPY_WAIT_CMD, 499 NULL); 500 return ide_started; 501 } 502 debug_log("The floppy wants to send us more data than" 503 " expected - allowing transfer\n"); 504 } 505 } 506 if (pc->flags & PC_FLAG_WRITING) 507 xferfunc = hwif->output_data; 508 else 509 xferfunc = hwif->input_data; 510 511 if (pc->buf) 512 xferfunc(drive, NULL, pc->cur_pos, bcount); 513 else 514 ide_floppy_io_buffers(drive, pc, bcount, 515 !!(pc->flags & PC_FLAG_WRITING)); 516 517 /* Update the current position */ 518 pc->xferred += bcount; 519 pc->cur_pos += bcount; 520 521 /* And set the interrupt handler again */ 522 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 523 return ide_started; 524} 525 526/* 527 * This is the original routine that did the packet transfer. 528 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 529 * for that drive below. The algorithm is chosen based on drive type 530 */ 531static ide_startstop_t idefloppy_transfer_pc(ide_drive_t *drive) 532{ 533 ide_hwif_t *hwif = drive->hwif; 534 ide_startstop_t startstop; 535 idefloppy_floppy_t *floppy = drive->driver_data; 536 u8 ireason; 537 538 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 539 printk(KERN_ERR "ide-floppy: Strange, packet command " 540 "initiated yet DRQ isn't asserted\n"); 541 return startstop; 542 } 543 ireason = hwif->INB(hwif->io_ports.nsect_addr); 544 if ((ireason & CD) == 0 || (ireason & IO)) { 545 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 546 "issuing a packet command\n"); 547 return ide_do_reset(drive); 548 } 549 550 /* Set the interrupt routine */ 551 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 552 553 /* Send the actual packet */ 554 hwif->output_data(drive, NULL, floppy->pc->c, 12); 555 556 return ide_started; 557} 558 559 560/* 561 * What we have here is a classic case of a top half / bottom half interrupt 562 * service routine. In interrupt mode, the device sends an interrupt to signal 563 * that it is ready to receive a packet. However, we need to delay about 2-3 564 * ticks before issuing the packet or we gets in trouble. 565 * 566 * So, follow carefully. transfer_pc1 is called as an interrupt (or directly). 567 * In either case, when the device says it's ready for a packet, we schedule 568 * the packet transfer to occur about 2-3 ticks later in transfer_pc2. 569 */ 570static int idefloppy_transfer_pc2(ide_drive_t *drive) 571{ 572 idefloppy_floppy_t *floppy = drive->driver_data; 573 574 /* Send the actual packet */ 575 drive->hwif->output_data(drive, NULL, floppy->pc->c, 12); 576 577 /* Timeout for the packet command */ 578 return IDEFLOPPY_WAIT_CMD; 579} 580 581static ide_startstop_t idefloppy_transfer_pc1(ide_drive_t *drive) 582{ 583 ide_hwif_t *hwif = drive->hwif; 584 idefloppy_floppy_t *floppy = drive->driver_data; 585 ide_startstop_t startstop; 586 u8 ireason; 587 588 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 589 printk(KERN_ERR "ide-floppy: Strange, packet command " 590 "initiated yet DRQ isn't asserted\n"); 591 return startstop; 592 } 593 ireason = hwif->INB(hwif->io_ports.nsect_addr); 594 if ((ireason & CD) == 0 || (ireason & IO)) { 595 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 596 "while issuing a packet command\n"); 597 return ide_do_reset(drive); 598 } 599 /* 600 * The following delay solves a problem with ATAPI Zip 100 drives 601 * where the Busy flag was apparently being deasserted before the 602 * unit was ready to receive data. This was happening on a 603 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 604 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 605 * used until after the packet is moved in about 50 msec. 606 */ 607 608 ide_set_handler(drive, &idefloppy_pc_intr, floppy->ticks, 609 &idefloppy_transfer_pc2); 610 return ide_started; 611} 612 613static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 614 struct ide_atapi_pc *pc) 615{ 616 /* supress error messages resulting from Medium not present */ 617 if (floppy->sense_key == 0x02 && 618 floppy->asc == 0x3a && 619 floppy->ascq == 0x00) 620 return; 621 622 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 623 "asc = %2x, ascq = %2x\n", 624 floppy->drive->name, pc->c[0], floppy->sense_key, 625 floppy->asc, floppy->ascq); 626 627} 628 629static ide_startstop_t idefloppy_issue_pc(ide_drive_t *drive, 630 struct ide_atapi_pc *pc) 631{ 632 idefloppy_floppy_t *floppy = drive->driver_data; 633 ide_hwif_t *hwif = drive->hwif; 634 ide_handler_t *pkt_xfer_routine; 635 u16 bcount; 636 u8 dma; 637 638 if (floppy->failed_pc == NULL && 639 pc->c[0] != GPCMD_REQUEST_SENSE) 640 floppy->failed_pc = pc; 641 /* Set the current packet command */ 642 floppy->pc = pc; 643 644 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES) { 645 if (!(pc->flags & PC_FLAG_SUPPRESS_ERROR)) 646 ide_floppy_report_error(floppy, pc); 647 /* Giving up */ 648 pc->error = IDEFLOPPY_ERROR_GENERAL; 649 650 floppy->failed_pc = NULL; 651 pc->idefloppy_callback(drive); 652 return ide_stopped; 653 } 654 655 debug_log("Retry number - %d\n", pc->retries); 656 657 pc->retries++; 658 /* We haven't transferred any data yet */ 659 pc->xferred = 0; 660 pc->cur_pos = pc->buf; 661 bcount = min(pc->req_xfer, 63 * 1024); 662 663 if (pc->flags & PC_FLAG_DMA_ERROR) { 664 pc->flags &= ~PC_FLAG_DMA_ERROR; 665 ide_dma_off(drive); 666 } 667 dma = 0; 668 669 if ((pc->flags & PC_FLAG_DMA_RECOMMENDED) && drive->using_dma) 670 dma = !hwif->dma_ops->dma_setup(drive); 671 672 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 673 IDE_TFLAG_OUT_DEVICE, bcount, dma); 674 675 if (dma) { 676 /* Begin DMA, if necessary */ 677 pc->flags |= PC_FLAG_DMA_IN_PROGRESS; 678 hwif->dma_ops->dma_start(drive); 679 } 680 681 /* Can we transfer the packet when we get the interrupt or wait? */ 682 if (floppy->flags & IDEFLOPPY_FLAG_ZIP_DRIVE) { 683 /* wait */ 684 pkt_xfer_routine = &idefloppy_transfer_pc1; 685 } else { 686 /* immediate */ 687 pkt_xfer_routine = &idefloppy_transfer_pc; 688 } 689 690 if (floppy->flags & IDEFLOPPY_FLAG_DRQ_INTERRUPT) { 691 /* Issue the packet command */ 692 ide_execute_command(drive, WIN_PACKETCMD, 693 pkt_xfer_routine, 694 IDEFLOPPY_WAIT_CMD, 695 NULL); 696 return ide_started; 697 } else { 698 /* Issue the packet command */ 699 hwif->OUTBSYNC(drive, WIN_PACKETCMD, 700 hwif->io_ports.command_addr); 701 ndelay(400); 702 return (*pkt_xfer_routine) (drive); 703 } 704} 705 706static void idefloppy_rw_callback(ide_drive_t *drive) 707{ 708 debug_log("Reached %s\n", __func__); 709 710 idefloppy_end_request(drive, 1, 0); 711 return; 712} 713 714static void idefloppy_create_prevent_cmd(struct ide_atapi_pc *pc, int prevent) 715{ 716 debug_log("creating prevent removal command, prevent = %d\n", prevent); 717 718 idefloppy_init_pc(pc); 719 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 720 pc->c[4] = prevent; 721} 722 723static void idefloppy_create_read_capacity_cmd(struct ide_atapi_pc *pc) 724{ 725 idefloppy_init_pc(pc); 726 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 727 pc->c[7] = 255; 728 pc->c[8] = 255; 729 pc->req_xfer = 255; 730} 731 732static void idefloppy_create_format_unit_cmd(struct ide_atapi_pc *pc, int b, 733 int l, int flags) 734{ 735 idefloppy_init_pc(pc); 736 pc->c[0] = GPCMD_FORMAT_UNIT; 737 pc->c[1] = 0x17; 738 739 memset(pc->buf, 0, 12); 740 pc->buf[1] = 0xA2; 741 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 742 743 if (flags & 1) /* Verify bit on... */ 744 pc->buf[1] ^= 0x20; /* ... turn off DCRT bit */ 745 pc->buf[3] = 8; 746 747 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buf[4])); 748 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buf[8])); 749 pc->buf_size = 12; 750 pc->flags |= PC_FLAG_WRITING; 751} 752 753/* A mode sense command is used to "sense" floppy parameters. */ 754static void idefloppy_create_mode_sense_cmd(struct ide_atapi_pc *pc, 755 u8 page_code, u8 type) 756{ 757 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 758 759 idefloppy_init_pc(pc); 760 pc->c[0] = GPCMD_MODE_SENSE_10; 761 pc->c[1] = 0; 762 pc->c[2] = page_code + (type << 6); 763 764 switch (page_code) { 765 case IDEFLOPPY_CAPABILITIES_PAGE: 766 length += 12; 767 break; 768 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 769 length += 32; 770 break; 771 default: 772 printk(KERN_ERR "ide-floppy: unsupported page code " 773 "in create_mode_sense_cmd\n"); 774 } 775 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 776 pc->req_xfer = length; 777} 778 779static void idefloppy_create_start_stop_cmd(struct ide_atapi_pc *pc, int start) 780{ 781 idefloppy_init_pc(pc); 782 pc->c[0] = GPCMD_START_STOP_UNIT; 783 pc->c[4] = start; 784} 785 786static void idefloppy_create_test_unit_ready_cmd(struct ide_atapi_pc *pc) 787{ 788 idefloppy_init_pc(pc); 789 pc->c[0] = GPCMD_TEST_UNIT_READY; 790} 791 792static void idefloppy_create_rw_cmd(idefloppy_floppy_t *floppy, 793 struct ide_atapi_pc *pc, struct request *rq, 794 unsigned long sector) 795{ 796 int block = sector / floppy->bs_factor; 797 int blocks = rq->nr_sectors / floppy->bs_factor; 798 int cmd = rq_data_dir(rq); 799 800 debug_log("create_rw10_cmd: block == %d, blocks == %d\n", 801 block, blocks); 802 803 idefloppy_init_pc(pc); 804 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 805 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 806 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 807 808 pc->idefloppy_callback = &idefloppy_rw_callback; 809 pc->rq = rq; 810 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 811 if (rq->cmd_flags & REQ_RW) 812 pc->flags |= PC_FLAG_WRITING; 813 pc->buf = NULL; 814 pc->req_xfer = pc->buf_size = blocks * floppy->block_size; 815 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 816} 817 818static void idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, 819 struct ide_atapi_pc *pc, struct request *rq) 820{ 821 idefloppy_init_pc(pc); 822 pc->idefloppy_callback = &idefloppy_rw_callback; 823 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 824 pc->rq = rq; 825 pc->b_count = rq->data_len; 826 if (rq->data_len && rq_data_dir(rq) == WRITE) 827 pc->flags |= PC_FLAG_WRITING; 828 pc->buf = rq->data; 829 if (rq->bio) 830 pc->flags |= PC_FLAG_DMA_RECOMMENDED; 831 /* 832 * possibly problematic, doesn't look like ide-floppy correctly 833 * handled scattered requests if dma fails... 834 */ 835 pc->req_xfer = pc->buf_size = rq->data_len; 836} 837 838static ide_startstop_t idefloppy_do_request(ide_drive_t *drive, 839 struct request *rq, sector_t block_s) 840{ 841 idefloppy_floppy_t *floppy = drive->driver_data; 842 struct ide_atapi_pc *pc; 843 unsigned long block = (unsigned long)block_s; 844 845 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 846 rq->rq_disk ? rq->rq_disk->disk_name : "?", 847 rq->cmd_type, rq->errors); 848 debug_log("sector: %ld, nr_sectors: %ld, " 849 "current_nr_sectors: %d\n", (long)rq->sector, 850 rq->nr_sectors, rq->current_nr_sectors); 851 852 if (rq->errors >= ERROR_MAX) { 853 if (floppy->failed_pc) 854 ide_floppy_report_error(floppy, floppy->failed_pc); 855 else 856 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 857 drive->name); 858 idefloppy_end_request(drive, 0, 0); 859 return ide_stopped; 860 } 861 if (blk_fs_request(rq)) { 862 if (((long)rq->sector % floppy->bs_factor) || 863 (rq->nr_sectors % floppy->bs_factor)) { 864 printk(KERN_ERR "%s: unsupported r/w request size\n", 865 drive->name); 866 idefloppy_end_request(drive, 0, 0); 867 return ide_stopped; 868 } 869 pc = idefloppy_next_pc_storage(drive); 870 idefloppy_create_rw_cmd(floppy, pc, rq, block); 871 } else if (blk_special_request(rq)) { 872 pc = (struct ide_atapi_pc *) rq->buffer; 873 } else if (blk_pc_request(rq)) { 874 pc = idefloppy_next_pc_storage(drive); 875 idefloppy_blockpc_cmd(floppy, pc, rq); 876 } else { 877 blk_dump_rq_flags(rq, 878 "ide-floppy: unsupported command in queue"); 879 idefloppy_end_request(drive, 0, 0); 880 return ide_stopped; 881 } 882 883 pc->rq = rq; 884 return idefloppy_issue_pc(drive, pc); 885} 886 887/* 888 * Add a special packet command request to the tail of the request queue, 889 * and wait for it to be serviced. 890 */ 891static int idefloppy_queue_pc_tail(ide_drive_t *drive, struct ide_atapi_pc *pc) 892{ 893 struct ide_floppy_obj *floppy = drive->driver_data; 894 struct request rq; 895 896 ide_init_drive_cmd(&rq); 897 rq.buffer = (char *) pc; 898 rq.cmd_type = REQ_TYPE_SPECIAL; 899 rq.rq_disk = floppy->disk; 900 901 return ide_do_drive_cmd(drive, &rq, ide_wait); 902} 903 904/* 905 * Look at the flexible disk page parameters. We ignore the CHS capacity 906 * parameters and use the LBA parameters instead. 907 */ 908static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 909{ 910 idefloppy_floppy_t *floppy = drive->driver_data; 911 struct ide_atapi_pc pc; 912 u8 *page; 913 int capacity, lba_capacity; 914 u16 transfer_rate, sector_size, cyls, rpm; 915 u8 heads, sectors; 916 917 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 918 MODE_SENSE_CURRENT); 919 920 if (idefloppy_queue_pc_tail(drive, &pc)) { 921 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 922 " parameters\n"); 923 return 1; 924 } 925 floppy->wp = !!(pc.buf[3] & 0x80); 926 set_disk_ro(floppy->disk, floppy->wp); 927 page = &pc.buf[8]; 928 929 transfer_rate = be16_to_cpu(*(u16 *)&pc.buf[8 + 2]); 930 sector_size = be16_to_cpu(*(u16 *)&pc.buf[8 + 6]); 931 cyls = be16_to_cpu(*(u16 *)&pc.buf[8 + 8]); 932 rpm = be16_to_cpu(*(u16 *)&pc.buf[8 + 28]); 933 heads = pc.buf[8 + 4]; 934 sectors = pc.buf[8 + 5]; 935 936 capacity = cyls * heads * sectors * sector_size; 937 938 if (memcmp(page, &floppy->flexible_disk_page, 32)) 939 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 940 "%d sector size, %d rpm\n", 941 drive->name, capacity / 1024, cyls, heads, 942 sectors, transfer_rate / 8, sector_size, rpm); 943 944 memcpy(&floppy->flexible_disk_page, page, 32); 945 drive->bios_cyl = cyls; 946 drive->bios_head = heads; 947 drive->bios_sect = sectors; 948 lba_capacity = floppy->blocks * floppy->block_size; 949 950 if (capacity < lba_capacity) { 951 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 952 "bytes, but the drive only handles %d\n", 953 drive->name, lba_capacity, capacity); 954 floppy->blocks = floppy->block_size ? 955 capacity / floppy->block_size : 0; 956 } 957 return 0; 958} 959 960static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 961{ 962 idefloppy_floppy_t *floppy = drive->driver_data; 963 struct ide_atapi_pc pc; 964 965 floppy->srfp = 0; 966 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 967 MODE_SENSE_CURRENT); 968 969 pc.flags |= PC_FLAG_SUPPRESS_ERROR; 970 if (idefloppy_queue_pc_tail(drive, &pc)) 971 return 1; 972 973 floppy->srfp = pc.buf[8 + 2] & 0x40; 974 return (0); 975} 976 977/* 978 * Determine if a media is present in the floppy drive, and if so, its LBA 979 * capacity. 980 */ 981static int ide_floppy_get_capacity(ide_drive_t *drive) 982{ 983 idefloppy_floppy_t *floppy = drive->driver_data; 984 struct ide_atapi_pc pc; 985 u8 *cap_desc; 986 u8 header_len, desc_cnt; 987 int i, rc = 1, blocks, length; 988 989 drive->bios_cyl = 0; 990 drive->bios_head = drive->bios_sect = 0; 991 floppy->blocks = 0; 992 floppy->bs_factor = 1; 993 set_capacity(floppy->disk, 0); 994 995 idefloppy_create_read_capacity_cmd(&pc); 996 if (idefloppy_queue_pc_tail(drive, &pc)) { 997 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 998 return 1; 999 } 1000 header_len = pc.buf[3]; 1001 cap_desc = &pc.buf[4]; 1002 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1003 1004 for (i = 0; i < desc_cnt; i++) { 1005 unsigned int desc_start = 4 + i*8; 1006 1007 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1008 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1009 1010 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 1011 i, blocks * length / 1024, blocks, length); 1012 1013 if (i) 1014 continue; 1015 /* 1016 * the code below is valid only for the 1st descriptor, ie i=0 1017 */ 1018 1019 switch (pc.buf[desc_start + 4] & 0x03) { 1020 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1021 case CAPACITY_UNFORMATTED: 1022 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1023 /* 1024 * If it is not a clik drive, break out 1025 * (maintains previous driver behaviour) 1026 */ 1027 break; 1028 case CAPACITY_CURRENT: 1029 /* Normal Zip/LS-120 disks */ 1030 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 1031 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1032 "sector size\n", drive->name, 1033 blocks * length / 1024, blocks, length); 1034 memcpy(&floppy->cap_desc, cap_desc, 8); 1035 1036 if (!length || length % 512) { 1037 printk(KERN_NOTICE "%s: %d bytes block size " 1038 "not supported\n", drive->name, length); 1039 } else { 1040 floppy->blocks = blocks; 1041 floppy->block_size = length; 1042 floppy->bs_factor = length / 512; 1043 if (floppy->bs_factor != 1) 1044 printk(KERN_NOTICE "%s: warning: non " 1045 "512 bytes block size not " 1046 "fully supported\n", 1047 drive->name); 1048 rc = 0; 1049 } 1050 break; 1051 case CAPACITY_NO_CARTRIDGE: 1052 /* 1053 * This is a KERN_ERR so it appears on screen 1054 * for the user to see 1055 */ 1056 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1057 break; 1058 case CAPACITY_INVALID: 1059 printk(KERN_ERR "%s: Invalid capacity for disk " 1060 "in drive\n", drive->name); 1061 break; 1062 } 1063 debug_log("Descriptor 0 Code: %d\n", 1064 pc.buf[desc_start + 4] & 0x03); 1065 } 1066 1067 /* Clik! disk does not support get_flexible_disk_page */ 1068 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) 1069 (void) ide_floppy_get_flexible_disk_page(drive); 1070 1071 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1072 return rc; 1073} 1074 1075/* 1076 * Obtain the list of formattable capacities. 1077 * Very similar to ide_floppy_get_capacity, except that we push the capacity 1078 * descriptors to userland, instead of our own structures. 1079 * 1080 * Userland gives us the following structure: 1081 * 1082 * struct idefloppy_format_capacities { 1083 * int nformats; 1084 * struct { 1085 * int nblocks; 1086 * int blocksize; 1087 * } formats[]; 1088 * }; 1089 * 1090 * userland initializes nformats to the number of allocated formats[] records. 1091 * On exit we set nformats to the number of records we've actually initialized. 1092 */ 1093 1094static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1095{ 1096 struct ide_atapi_pc pc; 1097 u8 header_len, desc_cnt; 1098 int i, blocks, length, u_array_size, u_index; 1099 int __user *argp; 1100 1101 if (get_user(u_array_size, arg)) 1102 return (-EFAULT); 1103 1104 if (u_array_size <= 0) 1105 return (-EINVAL); 1106 1107 idefloppy_create_read_capacity_cmd(&pc); 1108 if (idefloppy_queue_pc_tail(drive, &pc)) { 1109 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1110 return (-EIO); 1111 } 1112 header_len = pc.buf[3]; 1113 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1114 1115 u_index = 0; 1116 argp = arg + 1; 1117 1118 /* 1119 * We always skip the first capacity descriptor. That's the current 1120 * capacity. We are interested in the remaining descriptors, the 1121 * formattable capacities. 1122 */ 1123 for (i = 1; i < desc_cnt; i++) { 1124 unsigned int desc_start = 4 + i*8; 1125 1126 if (u_index >= u_array_size) 1127 break; /* User-supplied buffer too small */ 1128 1129 blocks = be32_to_cpu(*(u32 *)&pc.buf[desc_start]); 1130 length = be16_to_cpu(*(u16 *)&pc.buf[desc_start + 6]); 1131 1132 if (put_user(blocks, argp)) 1133 return(-EFAULT); 1134 ++argp; 1135 1136 if (put_user(length, argp)) 1137 return (-EFAULT); 1138 ++argp; 1139 1140 ++u_index; 1141 } 1142 1143 if (put_user(u_index, arg)) 1144 return (-EFAULT); 1145 return (0); 1146} 1147 1148/* 1149 * Get ATAPI_FORMAT_UNIT progress indication. 1150 * 1151 * Userland gives a pointer to an int. The int is set to a progress 1152 * indicator 0-65536, with 65536=100%. 1153 * 1154 * If the drive does not support format progress indication, we just check 1155 * the dsc bit, and return either 0 or 65536. 1156 */ 1157 1158static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1159{ 1160 idefloppy_floppy_t *floppy = drive->driver_data; 1161 struct ide_atapi_pc pc; 1162 int progress_indication = 0x10000; 1163 1164 if (floppy->srfp) { 1165 idefloppy_create_request_sense_cmd(&pc); 1166 if (idefloppy_queue_pc_tail(drive, &pc)) 1167 return (-EIO); 1168 1169 if (floppy->sense_key == 2 && 1170 floppy->asc == 4 && 1171 floppy->ascq == 4) 1172 progress_indication = floppy->progress_indication; 1173 1174 /* Else assume format_unit has finished, and we're at 0x10000 */ 1175 } else { 1176 unsigned long flags; 1177 u8 stat; 1178 1179 local_irq_save(flags); 1180 stat = ide_read_status(drive); 1181 local_irq_restore(flags); 1182 1183 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1184 } 1185 if (put_user(progress_indication, arg)) 1186 return (-EFAULT); 1187 1188 return (0); 1189} 1190 1191static sector_t idefloppy_capacity(ide_drive_t *drive) 1192{ 1193 idefloppy_floppy_t *floppy = drive->driver_data; 1194 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1195 1196 return capacity; 1197} 1198 1199/* 1200 * Check whether we can support a drive, based on the ATAPI IDENTIFY command 1201 * results. 1202 */ 1203static int idefloppy_identify_device(ide_drive_t *drive, struct hd_driveid *id) 1204{ 1205 u8 gcw[2]; 1206 u8 device_type, protocol, removable, drq_type, packet_size; 1207 1208 *((u16 *) &gcw) = id->config; 1209 1210 device_type = gcw[1] & 0x1F; 1211 removable = (gcw[0] & 0x80) >> 7; 1212 protocol = (gcw[1] & 0xC0) >> 6; 1213 drq_type = (gcw[0] & 0x60) >> 5; 1214 packet_size = gcw[0] & 0x03; 1215 1216#ifdef CONFIG_PPC 1217 /* kludge for Apple PowerBook internal zip */ 1218 if (device_type == 5 && 1219 !strstr(id->model, "CD-ROM") && strstr(id->model, "ZIP")) 1220 device_type = 0; 1221#endif 1222 1223 if (protocol != 2) 1224 printk(KERN_ERR "ide-floppy: Protocol (0x%02x) is not ATAPI\n", 1225 protocol); 1226 else if (device_type != 0) 1227 printk(KERN_ERR "ide-floppy: Device type (0x%02x) is not set " 1228 "to floppy\n", device_type); 1229 else if (!removable) 1230 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1231 else if (drq_type == 3) 1232 printk(KERN_ERR "ide-floppy: Sorry, DRQ type (0x%02x) not " 1233 "supported\n", drq_type); 1234 else if (packet_size != 0) 1235 printk(KERN_ERR "ide-floppy: Packet size (0x%02x) is not 12 " 1236 "bytes\n", packet_size); 1237 else 1238 return 1; 1239 return 0; 1240} 1241 1242#ifdef CONFIG_IDE_PROC_FS 1243static void idefloppy_add_settings(ide_drive_t *drive) 1244{ 1245 idefloppy_floppy_t *floppy = drive->driver_data; 1246 1247 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, 1248 &drive->bios_cyl, NULL); 1249 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1250 &drive->bios_head, NULL); 1251 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, 1252 &drive->bios_sect, NULL); 1253 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, 1254 &floppy->ticks, NULL); 1255} 1256#else 1257static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1258#endif 1259 1260static void idefloppy_setup(ide_drive_t *drive, idefloppy_floppy_t *floppy) 1261{ 1262 u8 gcw[2]; 1263 1264 *((u16 *) &gcw) = drive->id->config; 1265 floppy->pc = floppy->pc_stack; 1266 1267 if (((gcw[0] & 0x60) >> 5) == 1) 1268 floppy->flags |= IDEFLOPPY_FLAG_DRQ_INTERRUPT; 1269 /* 1270 * We used to check revisions here. At this point however I'm giving up. 1271 * Just assume they are all broken, its easier. 1272 * 1273 * The actual reason for the workarounds was likely a driver bug after 1274 * all rather than a firmware bug, and the workaround below used to hide 1275 * it. It should be fixed as of version 1.9, but to be on the safe side 1276 * we'll leave the limitation below for the 2.2.x tree. 1277 */ 1278 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1279 floppy->flags |= IDEFLOPPY_FLAG_ZIP_DRIVE; 1280 /* This value will be visible in the /proc/ide/hdx/settings */ 1281 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1282 blk_queue_max_sectors(drive->queue, 64); 1283 } 1284 1285 /* 1286 * Guess what? The IOMEGA Clik! drive also needs the above fix. It makes 1287 * nasty clicking noises without it, so please don't remove this. 1288 */ 1289 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1290 blk_queue_max_sectors(drive->queue, 64); 1291 floppy->flags |= IDEFLOPPY_FLAG_CLIK_DRIVE; 1292 } 1293 1294 (void) ide_floppy_get_capacity(drive); 1295 idefloppy_add_settings(drive); 1296} 1297 1298static void ide_floppy_remove(ide_drive_t *drive) 1299{ 1300 idefloppy_floppy_t *floppy = drive->driver_data; 1301 struct gendisk *g = floppy->disk; 1302 1303 ide_proc_unregister_driver(drive, floppy->driver); 1304 1305 del_gendisk(g); 1306 1307 ide_floppy_put(floppy); 1308} 1309 1310static void idefloppy_cleanup_obj(struct kref *kref) 1311{ 1312 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1313 ide_drive_t *drive = floppy->drive; 1314 struct gendisk *g = floppy->disk; 1315 1316 drive->driver_data = NULL; 1317 g->private_data = NULL; 1318 put_disk(g); 1319 kfree(floppy); 1320} 1321 1322#ifdef CONFIG_IDE_PROC_FS 1323static int proc_idefloppy_read_capacity(char *page, char **start, off_t off, 1324 int count, int *eof, void *data) 1325{ 1326 ide_drive_t*drive = (ide_drive_t *)data; 1327 int len; 1328 1329 len = sprintf(page, "%llu\n", (long long)idefloppy_capacity(drive)); 1330 PROC_IDE_READ_RETURN(page, start, off, count, eof, len); 1331} 1332 1333static ide_proc_entry_t idefloppy_proc[] = { 1334 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1335 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1336 { NULL, 0, NULL, NULL } 1337}; 1338#endif /* CONFIG_IDE_PROC_FS */ 1339 1340static int ide_floppy_probe(ide_drive_t *); 1341 1342static ide_driver_t idefloppy_driver = { 1343 .gen_driver = { 1344 .owner = THIS_MODULE, 1345 .name = "ide-floppy", 1346 .bus = &ide_bus_type, 1347 }, 1348 .probe = ide_floppy_probe, 1349 .remove = ide_floppy_remove, 1350 .version = IDEFLOPPY_VERSION, 1351 .media = ide_floppy, 1352 .supports_dsc_overlap = 0, 1353 .do_request = idefloppy_do_request, 1354 .end_request = idefloppy_end_request, 1355 .error = __ide_error, 1356 .abort = __ide_abort, 1357#ifdef CONFIG_IDE_PROC_FS 1358 .proc = idefloppy_proc, 1359#endif 1360}; 1361 1362static int idefloppy_open(struct inode *inode, struct file *filp) 1363{ 1364 struct gendisk *disk = inode->i_bdev->bd_disk; 1365 struct ide_floppy_obj *floppy; 1366 ide_drive_t *drive; 1367 struct ide_atapi_pc pc; 1368 int ret = 0; 1369 1370 debug_log("Reached %s\n", __func__); 1371 1372 floppy = ide_floppy_get(disk); 1373 if (!floppy) 1374 return -ENXIO; 1375 1376 drive = floppy->drive; 1377 1378 floppy->openers++; 1379 1380 if (floppy->openers == 1) { 1381 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1382 /* Just in case */ 1383 1384 idefloppy_create_test_unit_ready_cmd(&pc); 1385 if (idefloppy_queue_pc_tail(drive, &pc)) { 1386 idefloppy_create_start_stop_cmd(&pc, 1); 1387 (void) idefloppy_queue_pc_tail(drive, &pc); 1388 } 1389 1390 if (ide_floppy_get_capacity(drive) 1391 && (filp->f_flags & O_NDELAY) == 0 1392 /* 1393 * Allow O_NDELAY to open a drive without a disk, or with an 1394 * unreadable disk, so that we can get the format capacity 1395 * of the drive or begin the format - Sam 1396 */ 1397 ) { 1398 ret = -EIO; 1399 goto out_put_floppy; 1400 } 1401 1402 if (floppy->wp && (filp->f_mode & 2)) { 1403 ret = -EROFS; 1404 goto out_put_floppy; 1405 } 1406 floppy->flags |= IDEFLOPPY_FLAG_MEDIA_CHANGED; 1407 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1408 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1409 idefloppy_create_prevent_cmd(&pc, 1); 1410 (void) idefloppy_queue_pc_tail(drive, &pc); 1411 } 1412 check_disk_change(inode->i_bdev); 1413 } else if (floppy->flags & IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS) { 1414 ret = -EBUSY; 1415 goto out_put_floppy; 1416 } 1417 return 0; 1418 1419out_put_floppy: 1420 floppy->openers--; 1421 ide_floppy_put(floppy); 1422 return ret; 1423} 1424 1425static int idefloppy_release(struct inode *inode, struct file *filp) 1426{ 1427 struct gendisk *disk = inode->i_bdev->bd_disk; 1428 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1429 ide_drive_t *drive = floppy->drive; 1430 struct ide_atapi_pc pc; 1431 1432 debug_log("Reached %s\n", __func__); 1433 1434 if (floppy->openers == 1) { 1435 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1436 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1437 idefloppy_create_prevent_cmd(&pc, 0); 1438 (void) idefloppy_queue_pc_tail(drive, &pc); 1439 } 1440 1441 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1442 } 1443 1444 floppy->openers--; 1445 1446 ide_floppy_put(floppy); 1447 1448 return 0; 1449} 1450 1451static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1452{ 1453 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1454 ide_drive_t *drive = floppy->drive; 1455 1456 geo->heads = drive->bios_head; 1457 geo->sectors = drive->bios_sect; 1458 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1459 return 0; 1460} 1461 1462static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, 1463 struct ide_atapi_pc *pc, unsigned long arg, unsigned int cmd) 1464{ 1465 if (floppy->openers > 1) 1466 return -EBUSY; 1467 1468 /* The IOMEGA Clik! Drive doesn't support this command - 1469 * no room for an eject mechanism */ 1470 if (!(floppy->flags & IDEFLOPPY_FLAG_CLIK_DRIVE)) { 1471 int prevent = arg ? 1 : 0; 1472 1473 if (cmd == CDROMEJECT) 1474 prevent = 0; 1475 1476 idefloppy_create_prevent_cmd(pc, prevent); 1477 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1478 } 1479 1480 if (cmd == CDROMEJECT) { 1481 idefloppy_create_start_stop_cmd(pc, 2); 1482 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1483 } 1484 1485 return 0; 1486} 1487 1488static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1489 int __user *arg) 1490{ 1491 int blocks, length, flags, err = 0; 1492 struct ide_atapi_pc pc; 1493 1494 if (floppy->openers > 1) { 1495 /* Don't format if someone is using the disk */ 1496 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1497 return -EBUSY; 1498 } 1499 1500 floppy->flags |= IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1501 1502 /* 1503 * Send ATAPI_FORMAT_UNIT to the drive. 1504 * 1505 * Userland gives us the following structure: 1506 * 1507 * struct idefloppy_format_command { 1508 * int nblocks; 1509 * int blocksize; 1510 * int flags; 1511 * } ; 1512 * 1513 * flags is a bitmask, currently, the only defined flag is: 1514 * 1515 * 0x01 - verify media after format. 1516 */ 1517 if (get_user(blocks, arg) || 1518 get_user(length, arg+1) || 1519 get_user(flags, arg+2)) { 1520 err = -EFAULT; 1521 goto out; 1522 } 1523 1524 (void) idefloppy_get_sfrp_bit(floppy->drive); 1525 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1526 1527 if (idefloppy_queue_pc_tail(floppy->drive, &pc)) 1528 err = -EIO; 1529 1530out: 1531 if (err) 1532 floppy->flags &= ~IDEFLOPPY_FLAG_FORMAT_IN_PROGRESS; 1533 return err; 1534} 1535 1536 1537static int idefloppy_ioctl(struct inode *inode, struct file *file, 1538 unsigned int cmd, unsigned long arg) 1539{ 1540 struct block_device *bdev = inode->i_bdev; 1541 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1542 ide_drive_t *drive = floppy->drive; 1543 struct ide_atapi_pc pc; 1544 void __user *argp = (void __user *)arg; 1545 int err; 1546 1547 switch (cmd) { 1548 case CDROMEJECT: 1549 /* fall through */ 1550 case CDROM_LOCKDOOR: 1551 return ide_floppy_lockdoor(floppy, &pc, arg, cmd); 1552 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1553 return 0; 1554 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1555 return ide_floppy_get_format_capacities(drive, argp); 1556 case IDEFLOPPY_IOCTL_FORMAT_START: 1557 if (!(file->f_mode & 2)) 1558 return -EPERM; 1559 1560 return ide_floppy_format_unit(floppy, (int __user *)arg); 1561 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1562 return idefloppy_get_format_progress(drive, argp); 1563 } 1564 1565 /* 1566 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1567 * and CDROM_SEND_PACKET (legacy) ioctls 1568 */ 1569 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1570 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1571 bdev->bd_disk, cmd, argp); 1572 else 1573 err = -ENOTTY; 1574 1575 if (err == -ENOTTY) 1576 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1577 1578 return err; 1579} 1580 1581static int idefloppy_media_changed(struct gendisk *disk) 1582{ 1583 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1584 ide_drive_t *drive = floppy->drive; 1585 int ret; 1586 1587 /* do not scan partitions twice if this is a removable device */ 1588 if (drive->attach) { 1589 drive->attach = 0; 1590 return 0; 1591 } 1592 ret = !!(floppy->flags & IDEFLOPPY_FLAG_MEDIA_CHANGED); 1593 floppy->flags &= ~IDEFLOPPY_FLAG_MEDIA_CHANGED; 1594 return ret; 1595} 1596 1597static int idefloppy_revalidate_disk(struct gendisk *disk) 1598{ 1599 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1600 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1601 return 0; 1602} 1603 1604static struct block_device_operations idefloppy_ops = { 1605 .owner = THIS_MODULE, 1606 .open = idefloppy_open, 1607 .release = idefloppy_release, 1608 .ioctl = idefloppy_ioctl, 1609 .getgeo = idefloppy_getgeo, 1610 .media_changed = idefloppy_media_changed, 1611 .revalidate_disk = idefloppy_revalidate_disk 1612}; 1613 1614static int ide_floppy_probe(ide_drive_t *drive) 1615{ 1616 idefloppy_floppy_t *floppy; 1617 struct gendisk *g; 1618 1619 if (!strstr("ide-floppy", drive->driver_req)) 1620 goto failed; 1621 if (!drive->present) 1622 goto failed; 1623 if (drive->media != ide_floppy) 1624 goto failed; 1625 if (!idefloppy_identify_device(drive, drive->id)) { 1626 printk(KERN_ERR "ide-floppy: %s: not supported by this version" 1627 " of ide-floppy\n", drive->name); 1628 goto failed; 1629 } 1630 if (drive->scsi) { 1631 printk(KERN_INFO "ide-floppy: passing drive %s to ide-scsi" 1632 " emulation.\n", drive->name); 1633 goto failed; 1634 } 1635 floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL); 1636 if (!floppy) { 1637 printk(KERN_ERR "ide-floppy: %s: Can't allocate a floppy" 1638 " structure\n", drive->name); 1639 goto failed; 1640 } 1641 1642 g = alloc_disk(1 << PARTN_BITS); 1643 if (!g) 1644 goto out_free_floppy; 1645 1646 ide_init_disk(g, drive); 1647 1648 ide_proc_register_driver(drive, &idefloppy_driver); 1649 1650 kref_init(&floppy->kref); 1651 1652 floppy->drive = drive; 1653 floppy->driver = &idefloppy_driver; 1654 floppy->disk = g; 1655 1656 g->private_data = &floppy->driver; 1657 1658 drive->driver_data = floppy; 1659 1660 idefloppy_setup(drive, floppy); 1661 1662 g->minors = 1 << PARTN_BITS; 1663 g->driverfs_dev = &drive->gendev; 1664 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1665 g->fops = &idefloppy_ops; 1666 drive->attach = 1; 1667 add_disk(g); 1668 return 0; 1669 1670out_free_floppy: 1671 kfree(floppy); 1672failed: 1673 return -ENODEV; 1674} 1675 1676static void __exit idefloppy_exit(void) 1677{ 1678 driver_unregister(&idefloppy_driver.gen_driver); 1679} 1680 1681static int __init idefloppy_init(void) 1682{ 1683 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1684 return driver_register(&idefloppy_driver.gen_driver); 1685} 1686 1687MODULE_ALIAS("ide:*m-floppy*"); 1688module_init(idefloppy_init); 1689module_exit(idefloppy_exit); 1690MODULE_LICENSE("GPL"); 1691MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1692 1693