ide-floppy.c revision d652c1380870228dfe05a2f00ce4edec3f5bd42d
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 9/* 10 * The driver currently doesn't have any fancy features, just the bare 11 * minimum read/write support. 12 * 13 * This driver supports the following IDE floppy drives: 14 * 15 * LS-120/240 SuperDisk 16 * Iomega Zip 100/250 17 * Iomega PC Card Clik!/PocketZip 18 * 19 * For a historical changelog see 20 * Documentation/ide/ChangeLog.ide-floppy.1996-2002 21 */ 22 23#define IDEFLOPPY_VERSION "0.99.newide" 24 25#include <linux/module.h> 26#include <linux/types.h> 27#include <linux/string.h> 28#include <linux/kernel.h> 29#include <linux/delay.h> 30#include <linux/timer.h> 31#include <linux/mm.h> 32#include <linux/interrupt.h> 33#include <linux/major.h> 34#include <linux/errno.h> 35#include <linux/genhd.h> 36#include <linux/slab.h> 37#include <linux/cdrom.h> 38#include <linux/ide.h> 39#include <linux/bitops.h> 40#include <linux/mutex.h> 41 42#include <scsi/scsi_ioctl.h> 43 44#include <asm/byteorder.h> 45#include <linux/irq.h> 46#include <linux/uaccess.h> 47#include <linux/io.h> 48#include <asm/unaligned.h> 49 50/* 51 * The following are used to debug the driver. 52 */ 53#define IDEFLOPPY_DEBUG_LOG 0 54#define IDEFLOPPY_DEBUG_INFO 0 55#define IDEFLOPPY_DEBUG_BUGS 1 56 57/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 58#define IDEFLOPPY_DEBUG( fmt, args... ) 59 60#if IDEFLOPPY_DEBUG_LOG 61#define debug_log(fmt, args...) \ 62 printk(KERN_INFO "ide-floppy: " fmt, ## args) 63#else 64#define debug_log(fmt, args... ) do {} while(0) 65#endif 66 67 68/* 69 * Some drives require a longer irq timeout. 70 */ 71#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 72 73/* 74 * After each failed packet command we issue a request sense command 75 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 76 */ 77#define IDEFLOPPY_MAX_PC_RETRIES 3 78 79/* 80 * With each packet command, we allocate a buffer of 81 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 82 */ 83#define IDEFLOPPY_PC_BUFFER_SIZE 256 84 85/* 86 * In various places in the driver, we need to allocate storage 87 * for packet commands and requests, which will remain valid while 88 * we leave the driver to wait for an interrupt or a timeout event. 89 */ 90#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 91 92/* 93 * Our view of a packet command. 94 */ 95typedef struct idefloppy_packet_command_s { 96 u8 c[12]; /* Actual packet bytes */ 97 int retries; /* On each retry, we increment retries */ 98 int error; /* Error code */ 99 int request_transfer; /* Bytes to transfer */ 100 int actually_transferred; /* Bytes actually transferred */ 101 int buffer_size; /* Size of our data buffer */ 102 int b_count; /* Missing/Available data on the current buffer */ 103 struct request *rq; /* The corresponding request */ 104 u8 *buffer; /* Data buffer */ 105 u8 *current_position; /* Pointer into the above buffer */ 106 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 107 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 108 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 109} idefloppy_pc_t; 110 111/* 112 * Packet command flag bits. 113 */ 114#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 115#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 116#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 117#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 118#define PC_WRITING 5 /* Data direction */ 119 120#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 121 122/* format capacities descriptor codes */ 123#define CAPACITY_INVALID 0x00 124#define CAPACITY_UNFORMATTED 0x01 125#define CAPACITY_CURRENT 0x02 126#define CAPACITY_NO_CARTRIDGE 0x03 127 128/* 129 * Most of our global data which we need to save even as we leave the 130 * driver due to an interrupt or a timer event is stored in a variable 131 * of type idefloppy_floppy_t, defined below. 132 */ 133typedef struct ide_floppy_obj { 134 ide_drive_t *drive; 135 ide_driver_t *driver; 136 struct gendisk *disk; 137 struct kref kref; 138 unsigned int openers; /* protected by BKL for now */ 139 140 /* Current packet command */ 141 idefloppy_pc_t *pc; 142 /* Last failed packet command */ 143 idefloppy_pc_t *failed_pc; 144 /* Packet command stack */ 145 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 146 /* Next free packet command storage space */ 147 int pc_stack_index; 148 struct request rq_stack[IDEFLOPPY_PC_STACK]; 149 /* We implement a circular array */ 150 int rq_stack_index; 151 152 /* 153 * Last error information 154 */ 155 u8 sense_key, asc, ascq; 156 /* delay this long before sending packet command */ 157 u8 ticks; 158 int progress_indication; 159 160 /* 161 * Device information 162 */ 163 /* Current format */ 164 int blocks, block_size, bs_factor; 165 /* Last format capacity descriptor */ 166 u8 cap_desc[8]; 167 /* Copy of the flexible disk page */ 168 u8 flexible_disk_page[32]; 169 /* Write protect */ 170 int wp; 171 /* Supports format progress report */ 172 int srfp; 173 /* Status/Action flags */ 174 unsigned long flags; 175} idefloppy_floppy_t; 176 177#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 178 179/* 180 * Floppy flag bits values. 181 */ 182#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 183#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 184#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 185#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 186#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 187#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 188 189/* 190 * Defines for the mode sense command 191 */ 192#define MODE_SENSE_CURRENT 0x00 193#define MODE_SENSE_CHANGEABLE 0x01 194#define MODE_SENSE_DEFAULT 0x02 195#define MODE_SENSE_SAVED 0x03 196 197/* 198 * IOCTLs used in low-level formatting. 199 */ 200 201#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 202#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 203#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 204#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 205 206/* 207 * Error codes which are returned in rq->errors to the higher part 208 * of the driver. 209 */ 210#define IDEFLOPPY_ERROR_GENERAL 101 211 212/* 213 * The following is used to format the general configuration word of 214 * the ATAPI IDENTIFY DEVICE command. 215 */ 216struct idefloppy_id_gcw { 217#if defined(__LITTLE_ENDIAN_BITFIELD) 218 unsigned packet_size :2; /* Packet Size */ 219 unsigned reserved234 :3; /* Reserved */ 220 unsigned drq_type :2; /* Command packet DRQ type */ 221 unsigned removable :1; /* Removable media */ 222 unsigned device_type :5; /* Device type */ 223 unsigned reserved13 :1; /* Reserved */ 224 unsigned protocol :2; /* Protocol type */ 225#elif defined(__BIG_ENDIAN_BITFIELD) 226 unsigned protocol :2; /* Protocol type */ 227 unsigned reserved13 :1; /* Reserved */ 228 unsigned device_type :5; /* Device type */ 229 unsigned removable :1; /* Removable media */ 230 unsigned drq_type :2; /* Command packet DRQ type */ 231 unsigned reserved234 :3; /* Reserved */ 232 unsigned packet_size :2; /* Packet Size */ 233#else 234#error "Bitfield endianness not defined! Check your byteorder.h" 235#endif 236}; 237 238/* 239 * Pages of the SELECT SENSE / MODE SENSE packet commands. 240 * See SFF-8070i spec. 241 */ 242#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 243#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 244 245static DEFINE_MUTEX(idefloppy_ref_mutex); 246 247#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 248 249#define ide_floppy_g(disk) \ 250 container_of((disk)->private_data, struct ide_floppy_obj, driver) 251 252static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 253{ 254 struct ide_floppy_obj *floppy = NULL; 255 256 mutex_lock(&idefloppy_ref_mutex); 257 floppy = ide_floppy_g(disk); 258 if (floppy) 259 kref_get(&floppy->kref); 260 mutex_unlock(&idefloppy_ref_mutex); 261 return floppy; 262} 263 264static void idefloppy_cleanup_obj(struct kref *); 265 266static void ide_floppy_put(struct ide_floppy_obj *floppy) 267{ 268 mutex_lock(&idefloppy_ref_mutex); 269 kref_put(&floppy->kref, idefloppy_cleanup_obj); 270 mutex_unlock(&idefloppy_ref_mutex); 271} 272 273/* 274 * Too bad. The drive wants to send us data which we are not ready to accept. 275 * Just throw it away. 276 */ 277static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 278{ 279 while (bcount--) 280 (void) HWIF(drive)->INB(IDE_DATA_REG); 281} 282 283#if IDEFLOPPY_DEBUG_BUGS 284static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 285{ 286 while (bcount--) 287 HWIF(drive)->OUTB(0, IDE_DATA_REG); 288} 289#endif /* IDEFLOPPY_DEBUG_BUGS */ 290 291 292/* 293 * idefloppy_do_end_request is used to finish servicing a request. 294 * 295 * For read/write requests, we will call ide_end_request to pass to the 296 * next buffer. 297 */ 298static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 299{ 300 idefloppy_floppy_t *floppy = drive->driver_data; 301 struct request *rq = HWGROUP(drive)->rq; 302 int error; 303 304 debug_log("Reached %s\n", __func__); 305 306 switch (uptodate) { 307 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 308 case 1: error = 0; break; 309 default: error = uptodate; 310 } 311 if (error) 312 floppy->failed_pc = NULL; 313 /* Why does this happen? */ 314 if (!rq) 315 return 0; 316 if (!blk_special_request(rq)) { 317 /* our real local end request function */ 318 ide_end_request(drive, uptodate, nsecs); 319 return 0; 320 } 321 rq->errors = error; 322 /* fixme: need to move this local also */ 323 ide_end_drive_cmd(drive, 0, 0); 324 return 0; 325} 326 327static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 328{ 329 struct request *rq = pc->rq; 330 struct bio_vec *bvec; 331 struct req_iterator iter; 332 unsigned long flags; 333 char *data; 334 int count, done = 0; 335 336 rq_for_each_segment(bvec, rq, iter) { 337 if (!bcount) 338 break; 339 340 count = min(bvec->bv_len, bcount); 341 342 data = bvec_kmap_irq(bvec, &flags); 343 drive->hwif->atapi_input_bytes(drive, data, count); 344 bvec_kunmap_irq(data, &flags); 345 346 bcount -= count; 347 pc->b_count += count; 348 done += count; 349 } 350 351 idefloppy_do_end_request(drive, 1, done >> 9); 352 353 if (bcount) { 354 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 355 idefloppy_discard_data(drive, bcount); 356 } 357} 358 359static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 360{ 361 struct request *rq = pc->rq; 362 struct req_iterator iter; 363 struct bio_vec *bvec; 364 unsigned long flags; 365 int count, done = 0; 366 char *data; 367 368 rq_for_each_segment(bvec, rq, iter) { 369 if (!bcount) 370 break; 371 372 count = min(bvec->bv_len, bcount); 373 374 data = bvec_kmap_irq(bvec, &flags); 375 drive->hwif->atapi_output_bytes(drive, data, count); 376 bvec_kunmap_irq(data, &flags); 377 378 bcount -= count; 379 pc->b_count += count; 380 done += count; 381 } 382 383 idefloppy_do_end_request(drive, 1, done >> 9); 384 385#if IDEFLOPPY_DEBUG_BUGS 386 if (bcount) { 387 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 388 idefloppy_write_zeros(drive, bcount); 389 } 390#endif 391} 392 393static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 394{ 395 struct request *rq = pc->rq; 396 struct bio *bio = rq->bio; 397 398 while ((bio = rq->bio) != NULL) 399 idefloppy_do_end_request(drive, 1, 0); 400} 401 402/* 403 * idefloppy_queue_pc_head generates a new packet command request in front 404 * of the request queue, before the current request, so that it will be 405 * processed immediately, on the next pass through the driver. 406 */ 407static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 408{ 409 struct ide_floppy_obj *floppy = drive->driver_data; 410 411 ide_init_drive_cmd(rq); 412 rq->buffer = (char *) pc; 413 rq->cmd_type = REQ_TYPE_SPECIAL; 414 rq->rq_disk = floppy->disk; 415 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 416} 417 418static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 419{ 420 idefloppy_floppy_t *floppy = drive->driver_data; 421 422 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 423 floppy->pc_stack_index=0; 424 return (&floppy->pc_stack[floppy->pc_stack_index++]); 425} 426 427static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 428{ 429 idefloppy_floppy_t *floppy = drive->driver_data; 430 431 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 432 floppy->rq_stack_index = 0; 433 return (&floppy->rq_stack[floppy->rq_stack_index++]); 434} 435 436static void idefloppy_request_sense_callback(ide_drive_t *drive) 437{ 438 idefloppy_floppy_t *floppy = drive->driver_data; 439 u8 *buf = floppy->pc->buffer; 440 441 debug_log("Reached %s\n", __func__); 442 443 if (!floppy->pc->error) { 444 floppy->sense_key = buf[2] & 0x0F; 445 floppy->asc = buf[12]; 446 floppy->ascq = buf[13]; 447 floppy->progress_indication = buf[15] & 0x80 ? 448 (u16)get_unaligned((u16 *)&buf[16]) : 0x10000; 449 450 if (floppy->failed_pc) 451 debug_log("pc = %x, sense key = %x, asc = %x," 452 " ascq = %x\n", 453 floppy->failed_pc->c[0], 454 floppy->sense_key, 455 floppy->asc, 456 floppy->ascq); 457 else 458 debug_log("sense key = %x, asc = %x, ascq = %x\n", 459 floppy->sense_key, 460 floppy->asc, 461 floppy->ascq); 462 463 464 idefloppy_do_end_request(drive, 1, 0); 465 } else { 466 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting" 467 " request!\n"); 468 idefloppy_do_end_request(drive, 0, 0); 469 } 470} 471 472/* 473 * General packet command callback function. 474 */ 475static void idefloppy_pc_callback (ide_drive_t *drive) 476{ 477 idefloppy_floppy_t *floppy = drive->driver_data; 478 479 debug_log("Reached %s\n", __func__); 480 481 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 482} 483 484/* 485 * idefloppy_init_pc initializes a packet command. 486 */ 487static void idefloppy_init_pc (idefloppy_pc_t *pc) 488{ 489 memset(pc->c, 0, 12); 490 pc->retries = 0; 491 pc->flags = 0; 492 pc->request_transfer = 0; 493 pc->buffer = pc->pc_buffer; 494 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 495 pc->callback = &idefloppy_pc_callback; 496} 497 498static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 499{ 500 idefloppy_init_pc(pc); 501 pc->c[0] = GPCMD_REQUEST_SENSE; 502 pc->c[4] = 255; 503 pc->request_transfer = 18; 504 pc->callback = &idefloppy_request_sense_callback; 505} 506 507/* 508 * idefloppy_retry_pc is called when an error was detected during the 509 * last packet command. We queue a request sense packet command in 510 * the head of the request list. 511 */ 512static void idefloppy_retry_pc (ide_drive_t *drive) 513{ 514 idefloppy_pc_t *pc; 515 struct request *rq; 516 517 (void)drive->hwif->INB(IDE_ERROR_REG); 518 pc = idefloppy_next_pc_storage(drive); 519 rq = idefloppy_next_rq_storage(drive); 520 idefloppy_create_request_sense_cmd(pc); 521 idefloppy_queue_pc_head(drive, pc, rq); 522} 523 524/* 525 * idefloppy_pc_intr is the usual interrupt handler which will be called 526 * during a packet command. 527 */ 528static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 529{ 530 idefloppy_floppy_t *floppy = drive->driver_data; 531 ide_hwif_t *hwif = drive->hwif; 532 idefloppy_pc_t *pc = floppy->pc; 533 struct request *rq = pc->rq; 534 unsigned int temp; 535 int dma_error = 0; 536 u16 bcount; 537 u8 stat, ireason; 538 539 debug_log("Reached %s interrupt handler\n", __func__); 540 541 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 542 dma_error = hwif->ide_dma_end(drive); 543 if (dma_error) { 544 printk(KERN_ERR "%s: DMA %s error\n", drive->name, 545 rq_data_dir(rq) ? "write" : "read"); 546 set_bit(PC_DMA_ERROR, &pc->flags); 547 } else { 548 pc->actually_transferred = pc->request_transfer; 549 idefloppy_update_buffers(drive, pc); 550 } 551 debug_log("DMA finished\n"); 552 } 553 554 /* Clear the interrupt */ 555 stat = drive->hwif->INB(IDE_STATUS_REG); 556 557 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ 558 debug_log("Packet command completed, %d bytes transferred\n", 559 pc->actually_transferred); 560 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 561 562 local_irq_enable_in_hardirq(); 563 564 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) { 565 /* Error detected */ 566 debug_log("%s: I/O error\n", drive->name); 567 rq->errors++; 568 if (pc->c[0] == GPCMD_REQUEST_SENSE) { 569 printk(KERN_ERR "ide-floppy: I/O error in " 570 "request sense command\n"); 571 return ide_do_reset(drive); 572 } 573 /* Retry operation */ 574 idefloppy_retry_pc(drive); 575 /* queued, but not started */ 576 return ide_stopped; 577 } 578 pc->error = 0; 579 if (floppy->failed_pc == pc) 580 floppy->failed_pc = NULL; 581 /* Command finished - Call the callback function */ 582 pc->callback(drive); 583 return ide_stopped; 584 } 585 586 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 587 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 588 "more interrupts in DMA mode\n"); 589 ide_dma_off(drive); 590 return ide_do_reset(drive); 591 } 592 593 /* Get the number of bytes to transfer */ 594 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | 595 hwif->INB(IDE_BCOUNTL_REG); 596 /* on this interrupt */ 597 ireason = hwif->INB(IDE_IREASON_REG); 598 599 if (ireason & CD) { 600 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 601 return ide_do_reset(drive); 602 } 603 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) { 604 /* Hopefully, we will never get here */ 605 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 606 (ireason & IO) ? "Write" : "Read"); 607 printk(KERN_ERR "but the floppy wants us to %s !\n", 608 (ireason & IO) ? "Read" : "Write"); 609 return ide_do_reset(drive); 610 } 611 if (!test_bit(PC_WRITING, &pc->flags)) { 612 /* Reading - Check that we have enough space */ 613 temp = pc->actually_transferred + bcount; 614 if (temp > pc->request_transfer) { 615 if (temp > pc->buffer_size) { 616 printk(KERN_ERR "ide-floppy: The floppy wants " 617 "to send us more data than expected " 618 "- discarding data\n"); 619 idefloppy_discard_data(drive, bcount); 620 621 ide_set_handler(drive, 622 &idefloppy_pc_intr, 623 IDEFLOPPY_WAIT_CMD, 624 NULL); 625 return ide_started; 626 } 627 debug_log("The floppy wants to send us more data than" 628 " expected - allowing transfer\n"); 629 } 630 } 631 if (test_bit(PC_WRITING, &pc->flags)) { 632 if (pc->buffer != NULL) 633 /* Write the current buffer */ 634 hwif->atapi_output_bytes(drive, pc->current_position, 635 bcount); 636 else 637 idefloppy_output_buffers(drive, pc, bcount); 638 } else { 639 if (pc->buffer != NULL) 640 /* Read the current buffer */ 641 hwif->atapi_input_bytes(drive, pc->current_position, 642 bcount); 643 else 644 idefloppy_input_buffers(drive, pc, bcount); 645 } 646 /* Update the current position */ 647 pc->actually_transferred += bcount; 648 pc->current_position += bcount; 649 650 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 651 return ide_started; 652} 653 654/* 655 * This is the original routine that did the packet transfer. 656 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 657 * for that drive below. The algorithm is chosen based on drive type 658 */ 659static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 660{ 661 ide_startstop_t startstop; 662 idefloppy_floppy_t *floppy = drive->driver_data; 663 u8 ireason; 664 665 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 666 printk(KERN_ERR "ide-floppy: Strange, packet command " 667 "initiated yet DRQ isn't asserted\n"); 668 return startstop; 669 } 670 ireason = drive->hwif->INB(IDE_IREASON_REG); 671 if ((ireason & CD) == 0 || (ireason & IO)) { 672 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 673 "issuing a packet command\n"); 674 return ide_do_reset(drive); 675 } 676 677 /* Set the interrupt routine */ 678 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 679 /* Send the actual packet */ 680 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 681 return ide_started; 682} 683 684 685/* 686 * What we have here is a classic case of a top half / bottom half 687 * interrupt service routine. In interrupt mode, the device sends 688 * an interrupt to signal it's ready to receive a packet. However, 689 * we need to delay about 2-3 ticks before issuing the packet or we 690 * gets in trouble. 691 * 692 * So, follow carefully. transfer_pc1 is called as an interrupt (or 693 * directly). In either case, when the device says it's ready for a 694 * packet, we schedule the packet transfer to occur about 2-3 ticks 695 * later in transfer_pc2. 696 */ 697static int idefloppy_transfer_pc2 (ide_drive_t *drive) 698{ 699 idefloppy_floppy_t *floppy = drive->driver_data; 700 701 /* Send the actual packet */ 702 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 703 /* Timeout for the packet command */ 704 return IDEFLOPPY_WAIT_CMD; 705} 706 707static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 708{ 709 idefloppy_floppy_t *floppy = drive->driver_data; 710 ide_startstop_t startstop; 711 u8 ireason; 712 713 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 714 printk(KERN_ERR "ide-floppy: Strange, packet command " 715 "initiated yet DRQ isn't asserted\n"); 716 return startstop; 717 } 718 ireason = drive->hwif->INB(IDE_IREASON_REG); 719 if ((ireason & CD) == 0 || (ireason & IO)) { 720 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 721 "while issuing a packet command\n"); 722 return ide_do_reset(drive); 723 } 724 /* 725 * The following delay solves a problem with ATAPI Zip 100 drives 726 * where the Busy flag was apparently being deasserted before the 727 * unit was ready to receive data. This was happening on a 728 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 729 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 730 * used until after the packet is moved in about 50 msec. 731 */ 732 733 ide_set_handler(drive, 734 &idefloppy_pc_intr, /* service routine for packet command */ 735 floppy->ticks, /* wait this long before "failing" */ 736 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 737 return ide_started; 738} 739 740static void ide_floppy_report_error(idefloppy_floppy_t *floppy, 741 idefloppy_pc_t *pc) 742{ 743 /* supress error messages resulting from Medium not present */ 744 if (floppy->sense_key == 0x02 && 745 floppy->asc == 0x3a && 746 floppy->ascq == 0x00) 747 return; 748 749 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x, key = %2x, " 750 "asc = %2x, ascq = %2x\n", 751 floppy->drive->name, pc->c[0], floppy->sense_key, 752 floppy->asc, floppy->ascq); 753 754} 755 756/* 757 * Issue a packet command 758 */ 759static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 760{ 761 idefloppy_floppy_t *floppy = drive->driver_data; 762 ide_hwif_t *hwif = drive->hwif; 763 ide_handler_t *pkt_xfer_routine; 764 u16 bcount; 765 u8 dma; 766 767 if (floppy->failed_pc == NULL && 768 pc->c[0] != GPCMD_REQUEST_SENSE) 769 floppy->failed_pc = pc; 770 /* Set the current packet command */ 771 floppy->pc = pc; 772 773 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 774 test_bit(PC_ABORT, &pc->flags)) { 775 /* 776 * We will "abort" retrying a packet command in case 777 * a legitimate error code was received. 778 */ 779 if (!test_bit(PC_ABORT, &pc->flags)) { 780 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) 781 ide_floppy_report_error(floppy, pc); 782 /* Giving up */ 783 pc->error = IDEFLOPPY_ERROR_GENERAL; 784 } 785 floppy->failed_pc = NULL; 786 pc->callback(drive); 787 return ide_stopped; 788 } 789 790 debug_log("Retry number - %d\n", pc->retries); 791 792 pc->retries++; 793 /* We haven't transferred any data yet */ 794 pc->actually_transferred = 0; 795 pc->current_position = pc->buffer; 796 bcount = min(pc->request_transfer, 63 * 1024); 797 798 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) 799 ide_dma_off(drive); 800 801 dma = 0; 802 803 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 804 dma = !hwif->dma_setup(drive); 805 806 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 807 IDE_TFLAG_OUT_DEVICE, bcount, dma); 808 809 if (dma) { /* Begin DMA, if necessary */ 810 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 811 hwif->dma_start(drive); 812 } 813 814 /* Can we transfer the packet when we get the interrupt or wait? */ 815 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 816 /* wait */ 817 pkt_xfer_routine = &idefloppy_transfer_pc1; 818 } else { 819 /* immediate */ 820 pkt_xfer_routine = &idefloppy_transfer_pc; 821 } 822 823 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 824 /* Issue the packet command */ 825 ide_execute_command(drive, WIN_PACKETCMD, 826 pkt_xfer_routine, 827 IDEFLOPPY_WAIT_CMD, 828 NULL); 829 return ide_started; 830 } else { 831 /* Issue the packet command */ 832 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 833 return (*pkt_xfer_routine) (drive); 834 } 835} 836 837static void idefloppy_rw_callback (ide_drive_t *drive) 838{ 839 debug_log("Reached %s\n", __func__); 840 841 idefloppy_do_end_request(drive, 1, 0); 842 return; 843} 844 845static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 846{ 847 debug_log("creating prevent removal command, prevent = %d\n", prevent); 848 849 idefloppy_init_pc(pc); 850 pc->c[0] = GPCMD_PREVENT_ALLOW_MEDIUM_REMOVAL; 851 pc->c[4] = prevent; 852} 853 854static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 855{ 856 idefloppy_init_pc(pc); 857 pc->c[0] = GPCMD_READ_FORMAT_CAPACITIES; 858 pc->c[7] = 255; 859 pc->c[8] = 255; 860 pc->request_transfer = 255; 861} 862 863static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 864 int flags) 865{ 866 idefloppy_init_pc(pc); 867 pc->c[0] = GPCMD_FORMAT_UNIT; 868 pc->c[1] = 0x17; 869 870 memset(pc->buffer, 0, 12); 871 pc->buffer[1] = 0xA2; 872 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 873 874 if (flags & 1) /* Verify bit on... */ 875 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 876 pc->buffer[3] = 8; 877 878 put_unaligned(cpu_to_be32(b), (unsigned int *)(&pc->buffer[4])); 879 put_unaligned(cpu_to_be32(l), (unsigned int *)(&pc->buffer[8])); 880 pc->buffer_size=12; 881 set_bit(PC_WRITING, &pc->flags); 882} 883 884/* 885 * A mode sense command is used to "sense" floppy parameters. 886 */ 887static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 888{ 889 u16 length = 8; /* sizeof(Mode Parameter Header) = 8 Bytes */ 890 891 idefloppy_init_pc(pc); 892 pc->c[0] = GPCMD_MODE_SENSE_10; 893 pc->c[1] = 0; 894 pc->c[2] = page_code + (type << 6); 895 896 switch (page_code) { 897 case IDEFLOPPY_CAPABILITIES_PAGE: 898 length += 12; 899 break; 900 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 901 length += 32; 902 break; 903 default: 904 printk(KERN_ERR "ide-floppy: unsupported page code " 905 "in create_mode_sense_cmd\n"); 906 } 907 put_unaligned(cpu_to_be16(length), (u16 *) &pc->c[7]); 908 pc->request_transfer = length; 909} 910 911static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 912{ 913 idefloppy_init_pc(pc); 914 pc->c[0] = GPCMD_START_STOP_UNIT; 915 pc->c[4] = start; 916} 917 918static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 919{ 920 idefloppy_init_pc(pc); 921 pc->c[0] = GPCMD_TEST_UNIT_READY; 922} 923 924static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 925{ 926 int block = sector / floppy->bs_factor; 927 int blocks = rq->nr_sectors / floppy->bs_factor; 928 int cmd = rq_data_dir(rq); 929 930 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 931 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 932 block, blocks); 933 934 idefloppy_init_pc(pc); 935 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 936 pc->c[0] = cmd == READ ? GPCMD_READ_12 : GPCMD_WRITE_12; 937 put_unaligned(cpu_to_be32(blocks), (unsigned int *) &pc->c[6]); 938 } else { 939 pc->c[0] = cmd == READ ? GPCMD_READ_10 : GPCMD_WRITE_10; 940 put_unaligned(cpu_to_be16(blocks), (unsigned short *)&pc->c[7]); 941 } 942 put_unaligned(cpu_to_be32(block), (unsigned int *) &pc->c[2]); 943 pc->callback = &idefloppy_rw_callback; 944 pc->rq = rq; 945 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 946 if (rq->cmd_flags & REQ_RW) 947 set_bit(PC_WRITING, &pc->flags); 948 pc->buffer = NULL; 949 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 950 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 951} 952 953static void 954idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 955{ 956 idefloppy_init_pc(pc); 957 pc->callback = &idefloppy_rw_callback; 958 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 959 pc->rq = rq; 960 pc->b_count = rq->data_len; 961 if (rq->data_len && rq_data_dir(rq) == WRITE) 962 set_bit(PC_WRITING, &pc->flags); 963 pc->buffer = rq->data; 964 if (rq->bio) 965 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 966 967 /* 968 * possibly problematic, doesn't look like ide-floppy correctly 969 * handled scattered requests if dma fails... 970 */ 971 pc->request_transfer = pc->buffer_size = rq->data_len; 972} 973 974/* 975 * idefloppy_do_request is our request handling function. 976 */ 977static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 978{ 979 idefloppy_floppy_t *floppy = drive->driver_data; 980 idefloppy_pc_t *pc; 981 unsigned long block = (unsigned long)block_s; 982 983 debug_log("dev: %s, cmd_type: %x, errors: %d\n", 984 rq->rq_disk ? rq->rq_disk->disk_name : "?", 985 rq->cmd_type, rq->errors); 986 debug_log("sector: %ld, nr_sectors: %ld, " 987 "current_nr_sectors: %d\n", (long)rq->sector, 988 rq->nr_sectors, rq->current_nr_sectors); 989 990 if (rq->errors >= ERROR_MAX) { 991 if (floppy->failed_pc) 992 ide_floppy_report_error(floppy, floppy->failed_pc); 993 else 994 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 995 drive->name); 996 idefloppy_do_end_request(drive, 0, 0); 997 return ide_stopped; 998 } 999 if (blk_fs_request(rq)) { 1000 if (((long)rq->sector % floppy->bs_factor) || 1001 (rq->nr_sectors % floppy->bs_factor)) { 1002 printk("%s: unsupported r/w request size\n", 1003 drive->name); 1004 idefloppy_do_end_request(drive, 0, 0); 1005 return ide_stopped; 1006 } 1007 pc = idefloppy_next_pc_storage(drive); 1008 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1009 } else if (blk_special_request(rq)) { 1010 pc = (idefloppy_pc_t *) rq->buffer; 1011 } else if (blk_pc_request(rq)) { 1012 pc = idefloppy_next_pc_storage(drive); 1013 idefloppy_blockpc_cmd(floppy, pc, rq); 1014 } else { 1015 blk_dump_rq_flags(rq, 1016 "ide-floppy: unsupported command in queue"); 1017 idefloppy_do_end_request(drive, 0, 0); 1018 return ide_stopped; 1019 } 1020 1021 pc->rq = rq; 1022 return idefloppy_issue_pc(drive, pc); 1023} 1024 1025/* 1026 * idefloppy_queue_pc_tail adds a special packet command request to the 1027 * tail of the request queue, and waits for it to be serviced. 1028 */ 1029static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1030{ 1031 struct ide_floppy_obj *floppy = drive->driver_data; 1032 struct request rq; 1033 1034 ide_init_drive_cmd (&rq); 1035 rq.buffer = (char *) pc; 1036 rq.cmd_type = REQ_TYPE_SPECIAL; 1037 rq.rq_disk = floppy->disk; 1038 1039 return ide_do_drive_cmd(drive, &rq, ide_wait); 1040} 1041 1042/* 1043 * Look at the flexible disk page parameters. We ignore the CHS capacity 1044 * parameters and use the LBA parameters instead. 1045 */ 1046static int ide_floppy_get_flexible_disk_page(ide_drive_t *drive) 1047{ 1048 idefloppy_floppy_t *floppy = drive->driver_data; 1049 idefloppy_pc_t pc; 1050 u8 *page; 1051 int capacity, lba_capacity; 1052 u16 transfer_rate, sector_size, cyls, rpm; 1053 u8 heads, sectors; 1054 1055 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, 1056 MODE_SENSE_CURRENT); 1057 1058 if (idefloppy_queue_pc_tail(drive, &pc)) { 1059 printk(KERN_ERR "ide-floppy: Can't get flexible disk page" 1060 " parameters\n"); 1061 return 1; 1062 } 1063 floppy->wp = !!(pc.buffer[3] & 0x80); 1064 set_disk_ro(floppy->disk, floppy->wp); 1065 page = &pc.buffer[8]; 1066 1067 transfer_rate = be16_to_cpu(*(u16 *)&pc.buffer[8 + 2]); 1068 sector_size = be16_to_cpu(*(u16 *)&pc.buffer[8 + 6]); 1069 cyls = be16_to_cpu(*(u16 *)&pc.buffer[8 + 8]); 1070 rpm = be16_to_cpu(*(u16 *)&pc.buffer[8 + 28]); 1071 heads = pc.buffer[8 + 4]; 1072 sectors = pc.buffer[8 + 5]; 1073 1074 capacity = cyls * heads * sectors * sector_size; 1075 1076 if (memcmp(page, &floppy->flexible_disk_page, 32)) 1077 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1078 "%d sector size, %d rpm\n", 1079 drive->name, capacity / 1024, cyls, heads, 1080 sectors, transfer_rate / 8, sector_size, rpm); 1081 1082 memcpy(&floppy->flexible_disk_page, page, 32); 1083 drive->bios_cyl = cyls; 1084 drive->bios_head = heads; 1085 drive->bios_sect = sectors; 1086 lba_capacity = floppy->blocks * floppy->block_size; 1087 1088 if (capacity < lba_capacity) { 1089 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1090 "bytes, but the drive only handles %d\n", 1091 drive->name, lba_capacity, capacity); 1092 floppy->blocks = floppy->block_size ? 1093 capacity / floppy->block_size : 0; 1094 } 1095 return 0; 1096} 1097 1098static int idefloppy_get_sfrp_bit(ide_drive_t *drive) 1099{ 1100 idefloppy_floppy_t *floppy = drive->driver_data; 1101 idefloppy_pc_t pc; 1102 1103 floppy->srfp = 0; 1104 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1105 MODE_SENSE_CURRENT); 1106 1107 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1108 if (idefloppy_queue_pc_tail(drive, &pc)) 1109 return 1; 1110 1111 floppy->srfp = pc.buffer[8 + 2] & 0x40; 1112 return (0); 1113} 1114 1115/* 1116 * Determine if a media is present in the floppy drive, and if so, its LBA 1117 * capacity. 1118 */ 1119static int ide_floppy_get_capacity(ide_drive_t *drive) 1120{ 1121 idefloppy_floppy_t *floppy = drive->driver_data; 1122 idefloppy_pc_t pc; 1123 u8 *cap_desc; 1124 u8 header_len, desc_cnt; 1125 int i, rc = 1, blocks, length; 1126 1127 drive->bios_cyl = 0; 1128 drive->bios_head = drive->bios_sect = 0; 1129 floppy->blocks = 0; 1130 floppy->bs_factor = 1; 1131 set_capacity(floppy->disk, 0); 1132 1133 idefloppy_create_read_capacity_cmd(&pc); 1134 if (idefloppy_queue_pc_tail(drive, &pc)) { 1135 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1136 return 1; 1137 } 1138 header_len = pc.buffer[3]; 1139 cap_desc = &pc.buffer[4]; 1140 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1141 1142 for (i = 0; i < desc_cnt; i++) { 1143 unsigned int desc_start = 4 + i*8; 1144 1145 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]); 1146 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]); 1147 1148 debug_log("Descriptor %d: %dkB, %d blocks, %d sector size\n", 1149 i, blocks * length / 1024, blocks, length); 1150 1151 if (i) 1152 continue; 1153 /* 1154 * the code below is valid only for the 1st descriptor, ie i=0 1155 */ 1156 1157 switch (pc.buffer[desc_start + 4] & 0x03) { 1158 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1159 case CAPACITY_UNFORMATTED: 1160 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1161 /* 1162 * If it is not a clik drive, break out 1163 * (maintains previous driver behaviour) 1164 */ 1165 break; 1166 case CAPACITY_CURRENT: 1167 /* Normal Zip/LS-120 disks */ 1168 if (memcmp(cap_desc, &floppy->cap_desc, 8)) 1169 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1170 "sector size\n", drive->name, 1171 blocks * length / 1024, blocks, length); 1172 memcpy(&floppy->cap_desc, cap_desc, 8); 1173 1174 if (!length || length % 512) { 1175 printk(KERN_NOTICE "%s: %d bytes block size " 1176 "not supported\n", drive->name, length); 1177 } else { 1178 floppy->blocks = blocks; 1179 floppy->block_size = length; 1180 floppy->bs_factor = length / 512; 1181 if (floppy->bs_factor != 1) 1182 printk(KERN_NOTICE "%s: warning: non " 1183 "512 bytes block size not " 1184 "fully supported\n", 1185 drive->name); 1186 rc = 0; 1187 } 1188 break; 1189 case CAPACITY_NO_CARTRIDGE: 1190 /* 1191 * This is a KERN_ERR so it appears on screen 1192 * for the user to see 1193 */ 1194 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1195 break; 1196 case CAPACITY_INVALID: 1197 printk(KERN_ERR "%s: Invalid capacity for disk " 1198 "in drive\n", drive->name); 1199 break; 1200 } 1201 debug_log("Descriptor 0 Code: %d\n", 1202 pc.buffer[desc_start + 4] & 0x03); 1203 } 1204 1205 /* Clik! disk does not support get_flexible_disk_page */ 1206 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1207 (void) ide_floppy_get_flexible_disk_page(drive); 1208 1209 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1210 return rc; 1211} 1212 1213/* 1214 * Obtain the list of formattable capacities. 1215 * Very similar to ide_floppy_get_capacity, except that we push the capacity 1216 * descriptors to userland, instead of our own structures. 1217 * 1218 * Userland gives us the following structure: 1219 * 1220 * struct idefloppy_format_capacities { 1221 * int nformats; 1222 * struct { 1223 * int nblocks; 1224 * int blocksize; 1225 * } formats[]; 1226 * }; 1227 * 1228 * userland initializes nformats to the number of allocated formats[] records. 1229 * On exit we set nformats to the number of records we've actually initialized. 1230 */ 1231 1232static int ide_floppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1233{ 1234 idefloppy_pc_t pc; 1235 u8 header_len, desc_cnt; 1236 int i, blocks, length, u_array_size, u_index; 1237 int __user *argp; 1238 1239 if (get_user(u_array_size, arg)) 1240 return (-EFAULT); 1241 1242 if (u_array_size <= 0) 1243 return (-EINVAL); 1244 1245 idefloppy_create_read_capacity_cmd(&pc); 1246 if (idefloppy_queue_pc_tail(drive, &pc)) { 1247 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1248 return (-EIO); 1249 } 1250 header_len = pc.buffer[3]; 1251 desc_cnt = header_len / 8; /* capacity descriptor of 8 bytes */ 1252 1253 u_index = 0; 1254 argp = arg + 1; 1255 1256 /* 1257 * We always skip the first capacity descriptor. That's the current 1258 * capacity. We are interested in the remaining descriptors, the 1259 * formattable capacities. 1260 */ 1261 for (i = 1; i < desc_cnt; i++) { 1262 unsigned int desc_start = 4 + i*8; 1263 1264 if (u_index >= u_array_size) 1265 break; /* User-supplied buffer too small */ 1266 1267 blocks = be32_to_cpu(*(u32 *)&pc.buffer[desc_start]); 1268 length = be16_to_cpu(*(u16 *)&pc.buffer[desc_start + 6]); 1269 1270 if (put_user(blocks, argp)) 1271 return(-EFAULT); 1272 ++argp; 1273 1274 if (put_user(length, argp)) 1275 return (-EFAULT); 1276 ++argp; 1277 1278 ++u_index; 1279 } 1280 1281 if (put_user(u_index, arg)) 1282 return (-EFAULT); 1283 return (0); 1284} 1285 1286/* 1287** Get ATAPI_FORMAT_UNIT progress indication. 1288** 1289** Userland gives a pointer to an int. The int is set to a progress 1290** indicator 0-65536, with 65536=100%. 1291** 1292** If the drive does not support format progress indication, we just check 1293** the dsc bit, and return either 0 or 65536. 1294*/ 1295 1296static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1297{ 1298 idefloppy_floppy_t *floppy = drive->driver_data; 1299 idefloppy_pc_t pc; 1300 int progress_indication = 0x10000; 1301 1302 if (floppy->srfp) { 1303 idefloppy_create_request_sense_cmd(&pc); 1304 if (idefloppy_queue_pc_tail(drive, &pc)) { 1305 return (-EIO); 1306 } 1307 1308 if (floppy->sense_key == 2 && 1309 floppy->asc == 4 && 1310 floppy->ascq == 4) { 1311 progress_indication = floppy->progress_indication; 1312 } 1313 /* Else assume format_unit has finished, and we're 1314 ** at 0x10000 */ 1315 } else { 1316 unsigned long flags; 1317 u8 stat; 1318 1319 local_irq_save(flags); 1320 stat = drive->hwif->INB(IDE_STATUS_REG); 1321 local_irq_restore(flags); 1322 1323 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1324 } 1325 if (put_user(progress_indication, arg)) 1326 return (-EFAULT); 1327 1328 return (0); 1329} 1330 1331/* 1332 * Return the current floppy capacity. 1333 */ 1334static sector_t idefloppy_capacity (ide_drive_t *drive) 1335{ 1336 idefloppy_floppy_t *floppy = drive->driver_data; 1337 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1338 1339 return capacity; 1340} 1341 1342/* 1343 * idefloppy_identify_device checks if we can support a drive, 1344 * based on the ATAPI IDENTIFY command results. 1345 */ 1346static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1347{ 1348 struct idefloppy_id_gcw gcw; 1349#if IDEFLOPPY_DEBUG_INFO 1350 char buffer[80]; 1351#endif /* IDEFLOPPY_DEBUG_INFO */ 1352 1353 *((u16 *) &gcw) = id->config; 1354 1355#ifdef CONFIG_PPC 1356 /* kludge for Apple PowerBook internal zip */ 1357 if ((gcw.device_type == 5) && 1358 !strstr(id->model, "CD-ROM") && 1359 strstr(id->model, "ZIP")) 1360 gcw.device_type = 0; 1361#endif 1362 1363#if IDEFLOPPY_DEBUG_INFO 1364 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1365 switch (gcw.protocol) { 1366 case 0: case 1: sprintf(buffer, "ATA");break; 1367 case 2: sprintf(buffer, "ATAPI");break; 1368 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1369 } 1370 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1371 switch (gcw.device_type) { 1372 case 0: sprintf(buffer, "Direct-access Device");break; 1373 case 1: sprintf(buffer, "Streaming Tape Device");break; 1374 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1375 case 5: sprintf(buffer, "CD-ROM Device");break; 1376 case 6: sprintf(buffer, "Reserved"); 1377 case 7: sprintf(buffer, "Optical memory Device");break; 1378 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1379 default: sprintf(buffer, "Reserved"); 1380 } 1381 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1382 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1383 switch (gcw.drq_type) { 1384 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1385 case 1: sprintf(buffer, "Interrupt DRQ");break; 1386 case 2: sprintf(buffer, "Accelerated DRQ");break; 1387 case 3: sprintf(buffer, "Reserved");break; 1388 } 1389 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1390 switch (gcw.packet_size) { 1391 case 0: sprintf(buffer, "12 bytes");break; 1392 case 1: sprintf(buffer, "16 bytes");break; 1393 default: sprintf(buffer, "Reserved");break; 1394 } 1395 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1396#endif /* IDEFLOPPY_DEBUG_INFO */ 1397 1398 if (gcw.protocol != 2) 1399 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1400 else if (gcw.device_type != 0) 1401 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1402 else if (!gcw.removable) 1403 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1404 else if (gcw.drq_type == 3) { 1405 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1406 } else if (gcw.packet_size != 0) { 1407 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1408 } else 1409 return 1; 1410 return 0; 1411} 1412 1413#ifdef CONFIG_IDE_PROC_FS 1414static void idefloppy_add_settings(ide_drive_t *drive) 1415{ 1416 idefloppy_floppy_t *floppy = drive->driver_data; 1417 1418/* 1419 * drive setting name read/write data type min max mul_factor div_factor data pointer set function 1420 */ 1421 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1422 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1423 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1424 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1425} 1426#else 1427static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1428#endif 1429 1430/* 1431 * Driver initialization. 1432 */ 1433static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1434{ 1435 struct idefloppy_id_gcw gcw; 1436 1437 *((u16 *) &gcw) = drive->id->config; 1438 floppy->pc = floppy->pc_stack; 1439 if (gcw.drq_type == 1) 1440 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1441 /* 1442 * We used to check revisions here. At this point however 1443 * I'm giving up. Just assume they are all broken, its easier. 1444 * 1445 * The actual reason for the workarounds was likely 1446 * a driver bug after all rather than a firmware bug, 1447 * and the workaround below used to hide it. It should 1448 * be fixed as of version 1.9, but to be on the safe side 1449 * we'll leave the limitation below for the 2.2.x tree. 1450 */ 1451 1452 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1453 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1454 /* This value will be visible in the /proc/ide/hdx/settings */ 1455 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1456 blk_queue_max_sectors(drive->queue, 64); 1457 } 1458 1459 /* 1460 * Guess what? The IOMEGA Clik! drive also needs the 1461 * above fix. It makes nasty clicking noises without 1462 * it, so please don't remove this. 1463 */ 1464 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1465 blk_queue_max_sectors(drive->queue, 64); 1466 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1467 } 1468 1469 1470 (void) ide_floppy_get_capacity(drive); 1471 idefloppy_add_settings(drive); 1472} 1473 1474static void ide_floppy_remove(ide_drive_t *drive) 1475{ 1476 idefloppy_floppy_t *floppy = drive->driver_data; 1477 struct gendisk *g = floppy->disk; 1478 1479 ide_proc_unregister_driver(drive, floppy->driver); 1480 1481 del_gendisk(g); 1482 1483 ide_floppy_put(floppy); 1484} 1485 1486static void idefloppy_cleanup_obj(struct kref *kref) 1487{ 1488 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1489 ide_drive_t *drive = floppy->drive; 1490 struct gendisk *g = floppy->disk; 1491 1492 drive->driver_data = NULL; 1493 g->private_data = NULL; 1494 put_disk(g); 1495 kfree(floppy); 1496} 1497 1498#ifdef CONFIG_IDE_PROC_FS 1499static int proc_idefloppy_read_capacity 1500 (char *page, char **start, off_t off, int count, int *eof, void *data) 1501{ 1502 ide_drive_t*drive = (ide_drive_t *)data; 1503 int len; 1504 1505 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1506 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1507} 1508 1509static ide_proc_entry_t idefloppy_proc[] = { 1510 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1511 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1512 { NULL, 0, NULL, NULL } 1513}; 1514#endif /* CONFIG_IDE_PROC_FS */ 1515 1516static int ide_floppy_probe(ide_drive_t *); 1517 1518static ide_driver_t idefloppy_driver = { 1519 .gen_driver = { 1520 .owner = THIS_MODULE, 1521 .name = "ide-floppy", 1522 .bus = &ide_bus_type, 1523 }, 1524 .probe = ide_floppy_probe, 1525 .remove = ide_floppy_remove, 1526 .version = IDEFLOPPY_VERSION, 1527 .media = ide_floppy, 1528 .supports_dsc_overlap = 0, 1529 .do_request = idefloppy_do_request, 1530 .end_request = idefloppy_do_end_request, 1531 .error = __ide_error, 1532 .abort = __ide_abort, 1533#ifdef CONFIG_IDE_PROC_FS 1534 .proc = idefloppy_proc, 1535#endif 1536}; 1537 1538static int idefloppy_open(struct inode *inode, struct file *filp) 1539{ 1540 struct gendisk *disk = inode->i_bdev->bd_disk; 1541 struct ide_floppy_obj *floppy; 1542 ide_drive_t *drive; 1543 idefloppy_pc_t pc; 1544 int ret = 0; 1545 1546 debug_log("Reached %s\n", __func__); 1547 1548 if (!(floppy = ide_floppy_get(disk))) 1549 return -ENXIO; 1550 1551 drive = floppy->drive; 1552 1553 floppy->openers++; 1554 1555 if (floppy->openers == 1) { 1556 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1557 /* Just in case */ 1558 1559 idefloppy_create_test_unit_ready_cmd(&pc); 1560 if (idefloppy_queue_pc_tail(drive, &pc)) { 1561 idefloppy_create_start_stop_cmd(&pc, 1); 1562 (void) idefloppy_queue_pc_tail(drive, &pc); 1563 } 1564 1565 if (ide_floppy_get_capacity(drive) 1566 && (filp->f_flags & O_NDELAY) == 0 1567 /* 1568 ** Allow O_NDELAY to open a drive without a disk, or with 1569 ** an unreadable disk, so that we can get the format 1570 ** capacity of the drive or begin the format - Sam 1571 */ 1572 ) { 1573 ret = -EIO; 1574 goto out_put_floppy; 1575 } 1576 1577 if (floppy->wp && (filp->f_mode & 2)) { 1578 ret = -EROFS; 1579 goto out_put_floppy; 1580 } 1581 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1582 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1583 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1584 idefloppy_create_prevent_cmd(&pc, 1); 1585 (void) idefloppy_queue_pc_tail(drive, &pc); 1586 } 1587 check_disk_change(inode->i_bdev); 1588 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1589 ret = -EBUSY; 1590 goto out_put_floppy; 1591 } 1592 return 0; 1593 1594out_put_floppy: 1595 floppy->openers--; 1596 ide_floppy_put(floppy); 1597 return ret; 1598} 1599 1600static int idefloppy_release(struct inode *inode, struct file *filp) 1601{ 1602 struct gendisk *disk = inode->i_bdev->bd_disk; 1603 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1604 ide_drive_t *drive = floppy->drive; 1605 idefloppy_pc_t pc; 1606 1607 debug_log("Reached %s\n", __func__); 1608 1609 if (floppy->openers == 1) { 1610 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1611 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1612 idefloppy_create_prevent_cmd(&pc, 0); 1613 (void) idefloppy_queue_pc_tail(drive, &pc); 1614 } 1615 1616 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1617 } 1618 1619 floppy->openers--; 1620 1621 ide_floppy_put(floppy); 1622 1623 return 0; 1624} 1625 1626static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1627{ 1628 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1629 ide_drive_t *drive = floppy->drive; 1630 1631 geo->heads = drive->bios_head; 1632 geo->sectors = drive->bios_sect; 1633 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1634 return 0; 1635} 1636 1637static int ide_floppy_lockdoor(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, 1638 unsigned long arg, unsigned int cmd) 1639{ 1640 if (floppy->openers > 1) 1641 return -EBUSY; 1642 1643 /* The IOMEGA Clik! Drive doesn't support this command - 1644 * no room for an eject mechanism */ 1645 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1646 int prevent = arg ? 1 : 0; 1647 1648 if (cmd == CDROMEJECT) 1649 prevent = 0; 1650 1651 idefloppy_create_prevent_cmd(pc, prevent); 1652 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1653 } 1654 1655 if (cmd == CDROMEJECT) { 1656 idefloppy_create_start_stop_cmd(pc, 2); 1657 (void) idefloppy_queue_pc_tail(floppy->drive, pc); 1658 } 1659 1660 return 0; 1661} 1662 1663static int ide_floppy_format_unit(idefloppy_floppy_t *floppy, 1664 int __user *arg) 1665{ 1666 int blocks, length, flags, err = 0; 1667 idefloppy_pc_t pc; 1668 1669 if (floppy->openers > 1) { 1670 /* Don't format if someone is using the disk */ 1671 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1672 return -EBUSY; 1673 } 1674 1675 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1676 1677 /* 1678 * Send ATAPI_FORMAT_UNIT to the drive. 1679 * 1680 * Userland gives us the following structure: 1681 * 1682 * struct idefloppy_format_command { 1683 * int nblocks; 1684 * int blocksize; 1685 * int flags; 1686 * } ; 1687 * 1688 * flags is a bitmask, currently, the only defined flag is: 1689 * 1690 * 0x01 - verify media after format. 1691 */ 1692 if (get_user(blocks, arg) || 1693 get_user(length, arg+1) || 1694 get_user(flags, arg+2)) { 1695 err = -EFAULT; 1696 goto out; 1697 } 1698 1699 (void) idefloppy_get_sfrp_bit(floppy->drive); 1700 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1701 1702 if (idefloppy_queue_pc_tail(floppy->drive, &pc)) 1703 err = -EIO; 1704 1705out: 1706 if (err) 1707 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1708 return err; 1709} 1710 1711 1712static int idefloppy_ioctl(struct inode *inode, struct file *file, 1713 unsigned int cmd, unsigned long arg) 1714{ 1715 struct block_device *bdev = inode->i_bdev; 1716 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1717 ide_drive_t *drive = floppy->drive; 1718 idefloppy_pc_t pc; 1719 void __user *argp = (void __user *)arg; 1720 int err; 1721 1722 switch (cmd) { 1723 case CDROMEJECT: 1724 /* fall through */ 1725 case CDROM_LOCKDOOR: 1726 return ide_floppy_lockdoor(floppy, &pc, arg, cmd); 1727 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1728 return 0; 1729 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1730 return ide_floppy_get_format_capacities(drive, argp); 1731 case IDEFLOPPY_IOCTL_FORMAT_START: 1732 if (!(file->f_mode & 2)) 1733 return -EPERM; 1734 1735 return ide_floppy_format_unit(floppy, (int __user *)arg); 1736 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1737 return idefloppy_get_format_progress(drive, argp); 1738 } 1739 1740 /* 1741 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1742 * and CDROM_SEND_PACKET (legacy) ioctls 1743 */ 1744 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1745 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1746 bdev->bd_disk, cmd, argp); 1747 else 1748 err = -ENOTTY; 1749 1750 if (err == -ENOTTY) 1751 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1752 1753 return err; 1754} 1755 1756static int idefloppy_media_changed(struct gendisk *disk) 1757{ 1758 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1759 ide_drive_t *drive = floppy->drive; 1760 1761 /* do not scan partitions twice if this is a removable device */ 1762 if (drive->attach) { 1763 drive->attach = 0; 1764 return 0; 1765 } 1766 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1767} 1768 1769static int idefloppy_revalidate_disk(struct gendisk *disk) 1770{ 1771 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1772 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1773 return 0; 1774} 1775 1776static struct block_device_operations idefloppy_ops = { 1777 .owner = THIS_MODULE, 1778 .open = idefloppy_open, 1779 .release = idefloppy_release, 1780 .ioctl = idefloppy_ioctl, 1781 .getgeo = idefloppy_getgeo, 1782 .media_changed = idefloppy_media_changed, 1783 .revalidate_disk= idefloppy_revalidate_disk 1784}; 1785 1786static int ide_floppy_probe(ide_drive_t *drive) 1787{ 1788 idefloppy_floppy_t *floppy; 1789 struct gendisk *g; 1790 1791 if (!strstr("ide-floppy", drive->driver_req)) 1792 goto failed; 1793 if (!drive->present) 1794 goto failed; 1795 if (drive->media != ide_floppy) 1796 goto failed; 1797 if (!idefloppy_identify_device (drive, drive->id)) { 1798 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 1799 goto failed; 1800 } 1801 if (drive->scsi) { 1802 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 1803 goto failed; 1804 } 1805 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 1806 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 1807 goto failed; 1808 } 1809 1810 g = alloc_disk(1 << PARTN_BITS); 1811 if (!g) 1812 goto out_free_floppy; 1813 1814 ide_init_disk(g, drive); 1815 1816 ide_proc_register_driver(drive, &idefloppy_driver); 1817 1818 kref_init(&floppy->kref); 1819 1820 floppy->drive = drive; 1821 floppy->driver = &idefloppy_driver; 1822 floppy->disk = g; 1823 1824 g->private_data = &floppy->driver; 1825 1826 drive->driver_data = floppy; 1827 1828 idefloppy_setup (drive, floppy); 1829 1830 g->minors = 1 << PARTN_BITS; 1831 g->driverfs_dev = &drive->gendev; 1832 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 1833 g->fops = &idefloppy_ops; 1834 drive->attach = 1; 1835 add_disk(g); 1836 return 0; 1837 1838out_free_floppy: 1839 kfree(floppy); 1840failed: 1841 return -ENODEV; 1842} 1843 1844MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 1845 1846static void __exit idefloppy_exit (void) 1847{ 1848 driver_unregister(&idefloppy_driver.gen_driver); 1849} 1850 1851static int __init idefloppy_init(void) 1852{ 1853 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 1854 return driver_register(&idefloppy_driver.gen_driver); 1855} 1856 1857MODULE_ALIAS("ide:*m-floppy*"); 1858module_init(idefloppy_init); 1859module_exit(idefloppy_exit); 1860MODULE_LICENSE("GPL"); 1861