ide-floppy.c revision d3f208488fcd9351e01f4e0ca088873192194094
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 <asm/irq.h> 46#include <asm/uaccess.h> 47#include <asm/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 printk 62#else 63#define debug_log(fmt, args... ) do {} while(0) 64#endif 65 66 67/* 68 * Some drives require a longer irq timeout. 69 */ 70#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 71 72/* 73 * After each failed packet command we issue a request sense command 74 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 75 */ 76#define IDEFLOPPY_MAX_PC_RETRIES 3 77 78/* 79 * With each packet command, we allocate a buffer of 80 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 81 */ 82#define IDEFLOPPY_PC_BUFFER_SIZE 256 83 84/* 85 * In various places in the driver, we need to allocate storage 86 * for packet commands and requests, which will remain valid while 87 * we leave the driver to wait for an interrupt or a timeout event. 88 */ 89#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 90 91/* 92 * Our view of a packet command. 93 */ 94typedef struct idefloppy_packet_command_s { 95 u8 c[12]; /* Actual packet bytes */ 96 int retries; /* On each retry, we increment retries */ 97 int error; /* Error code */ 98 int request_transfer; /* Bytes to transfer */ 99 int actually_transferred; /* Bytes actually transferred */ 100 int buffer_size; /* Size of our data buffer */ 101 int b_count; /* Missing/Available data on the current buffer */ 102 struct request *rq; /* The corresponding request */ 103 u8 *buffer; /* Data buffer */ 104 u8 *current_position; /* Pointer into the above buffer */ 105 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 106 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 107 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 108} idefloppy_pc_t; 109 110/* 111 * Packet command flag bits. 112 */ 113#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 114#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 115#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 116#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 117#define PC_WRITING 5 /* Data direction */ 118 119#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 120 121/* 122 * Removable Block Access Capabilities Page 123 */ 124typedef struct { 125#if defined(__LITTLE_ENDIAN_BITFIELD) 126 unsigned page_code :6; /* Page code - Should be 0x1b */ 127 unsigned reserved1_6 :1; /* Reserved */ 128 unsigned ps :1; /* Should be 0 */ 129#elif defined(__BIG_ENDIAN_BITFIELD) 130 unsigned ps :1; /* Should be 0 */ 131 unsigned reserved1_6 :1; /* Reserved */ 132 unsigned page_code :6; /* Page code - Should be 0x1b */ 133#else 134#error "Bitfield endianness not defined! Check your byteorder.h" 135#endif 136 u8 page_length; /* Page Length - Should be 0xa */ 137#if defined(__LITTLE_ENDIAN_BITFIELD) 138 unsigned reserved2 :6; 139 unsigned srfp :1; /* Supports reporting progress of format */ 140 unsigned sflp :1; /* System floppy type device */ 141 unsigned tlun :3; /* Total logical units supported by the device */ 142 unsigned reserved3 :3; 143 unsigned sml :1; /* Single / Multiple lun supported */ 144 unsigned ncd :1; /* Non cd optical device */ 145#elif defined(__BIG_ENDIAN_BITFIELD) 146 unsigned sflp :1; /* System floppy type device */ 147 unsigned srfp :1; /* Supports reporting progress of format */ 148 unsigned reserved2 :6; 149 unsigned ncd :1; /* Non cd optical device */ 150 unsigned sml :1; /* Single / Multiple lun supported */ 151 unsigned reserved3 :3; 152 unsigned tlun :3; /* Total logical units supported by the device */ 153#else 154#error "Bitfield endianness not defined! Check your byteorder.h" 155#endif 156 u8 reserved[8]; 157} idefloppy_capabilities_page_t; 158 159/* 160 * Flexible disk page. 161 */ 162typedef struct { 163#if defined(__LITTLE_ENDIAN_BITFIELD) 164 unsigned page_code :6; /* Page code - Should be 0x5 */ 165 unsigned reserved1_6 :1; /* Reserved */ 166 unsigned ps :1; /* The device is capable of saving the page */ 167#elif defined(__BIG_ENDIAN_BITFIELD) 168 unsigned ps :1; /* The device is capable of saving the page */ 169 unsigned reserved1_6 :1; /* Reserved */ 170 unsigned page_code :6; /* Page code - Should be 0x5 */ 171#else 172#error "Bitfield endianness not defined! Check your byteorder.h" 173#endif 174 u8 page_length; /* Page Length - Should be 0x1e */ 175 u16 transfer_rate; /* In kilobits per second */ 176 u8 heads, sectors; /* Number of heads, Number of sectors per track */ 177 u16 sector_size; /* Byes per sector */ 178 u16 cyls; /* Number of cylinders */ 179 u8 reserved10[10]; 180 u8 motor_delay; /* Motor off delay */ 181 u8 reserved21[7]; 182 u16 rpm; /* Rotations per minute */ 183 u8 reserved30[2]; 184} idefloppy_flexible_disk_page_t; 185 186/* 187 * Format capacity 188 */ 189typedef struct { 190 u8 reserved[3]; 191 u8 length; /* Length of the following descriptors in bytes */ 192} idefloppy_capacity_header_t; 193 194typedef struct { 195 u32 blocks; /* Number of blocks */ 196#if defined(__LITTLE_ENDIAN_BITFIELD) 197 unsigned dc :2; /* Descriptor Code */ 198 unsigned reserved :6; 199#elif defined(__BIG_ENDIAN_BITFIELD) 200 unsigned reserved :6; 201 unsigned dc :2; /* Descriptor Code */ 202#else 203#error "Bitfield endianness not defined! Check your byteorder.h" 204#endif 205 u8 length_msb; /* Block Length (MSB)*/ 206 u16 length; /* Block Length */ 207} idefloppy_capacity_descriptor_t; 208 209#define CAPACITY_INVALID 0x00 210#define CAPACITY_UNFORMATTED 0x01 211#define CAPACITY_CURRENT 0x02 212#define CAPACITY_NO_CARTRIDGE 0x03 213 214/* 215 * Most of our global data which we need to save even as we leave the 216 * driver due to an interrupt or a timer event is stored in a variable 217 * of type idefloppy_floppy_t, defined below. 218 */ 219typedef struct ide_floppy_obj { 220 ide_drive_t *drive; 221 ide_driver_t *driver; 222 struct gendisk *disk; 223 struct kref kref; 224 unsigned int openers; /* protected by BKL for now */ 225 226 /* Current packet command */ 227 idefloppy_pc_t *pc; 228 /* Last failed packet command */ 229 idefloppy_pc_t *failed_pc; 230 /* Packet command stack */ 231 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 232 /* Next free packet command storage space */ 233 int pc_stack_index; 234 struct request rq_stack[IDEFLOPPY_PC_STACK]; 235 /* We implement a circular array */ 236 int rq_stack_index; 237 238 /* 239 * Last error information 240 */ 241 u8 sense_key, asc, ascq; 242 /* delay this long before sending packet command */ 243 u8 ticks; 244 int progress_indication; 245 246 /* 247 * Device information 248 */ 249 /* Current format */ 250 int blocks, block_size, bs_factor; 251 /* Last format capacity */ 252 idefloppy_capacity_descriptor_t capacity; 253 /* Copy of the flexible disk page */ 254 idefloppy_flexible_disk_page_t flexible_disk_page; 255 /* Write protect */ 256 int wp; 257 /* Supports format progress report */ 258 int srfp; 259 /* Status/Action flags */ 260 unsigned long flags; 261} idefloppy_floppy_t; 262 263#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 264 265/* 266 * Floppy flag bits values. 267 */ 268#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 269#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 270#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 271#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 272#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 273#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 274 275/* 276 * ATAPI floppy drive packet commands 277 */ 278#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 279#define IDEFLOPPY_INQUIRY_CMD 0x12 280#define IDEFLOPPY_MODE_SELECT_CMD 0x55 281#define IDEFLOPPY_MODE_SENSE_CMD 0x5a 282#define IDEFLOPPY_READ10_CMD 0x28 283#define IDEFLOPPY_READ12_CMD 0xa8 284#define IDEFLOPPY_READ_CAPACITY_CMD 0x23 285#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 286#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e 287#define IDEFLOPPY_SEEK_CMD 0x2b 288#define IDEFLOPPY_START_STOP_CMD 0x1b 289#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 290#define IDEFLOPPY_VERIFY_CMD 0x2f 291#define IDEFLOPPY_WRITE10_CMD 0x2a 292#define IDEFLOPPY_WRITE12_CMD 0xaa 293#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e 294 295/* 296 * Defines for the mode sense command 297 */ 298#define MODE_SENSE_CURRENT 0x00 299#define MODE_SENSE_CHANGEABLE 0x01 300#define MODE_SENSE_DEFAULT 0x02 301#define MODE_SENSE_SAVED 0x03 302 303/* 304 * IOCTLs used in low-level formatting. 305 */ 306 307#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 308#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 309#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 310#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 311 312/* 313 * Error codes which are returned in rq->errors to the higher part 314 * of the driver. 315 */ 316#define IDEFLOPPY_ERROR_GENERAL 101 317 318/* 319 * The following is used to format the general configuration word of 320 * the ATAPI IDENTIFY DEVICE command. 321 */ 322struct idefloppy_id_gcw { 323#if defined(__LITTLE_ENDIAN_BITFIELD) 324 unsigned packet_size :2; /* Packet Size */ 325 unsigned reserved234 :3; /* Reserved */ 326 unsigned drq_type :2; /* Command packet DRQ type */ 327 unsigned removable :1; /* Removable media */ 328 unsigned device_type :5; /* Device type */ 329 unsigned reserved13 :1; /* Reserved */ 330 unsigned protocol :2; /* Protocol type */ 331#elif defined(__BIG_ENDIAN_BITFIELD) 332 unsigned protocol :2; /* Protocol type */ 333 unsigned reserved13 :1; /* Reserved */ 334 unsigned device_type :5; /* Device type */ 335 unsigned removable :1; /* Removable media */ 336 unsigned drq_type :2; /* Command packet DRQ type */ 337 unsigned reserved234 :3; /* Reserved */ 338 unsigned packet_size :2; /* Packet Size */ 339#else 340#error "Bitfield endianness not defined! Check your byteorder.h" 341#endif 342}; 343 344/* 345 * INQUIRY packet command - Data Format 346 */ 347typedef struct { 348#if defined(__LITTLE_ENDIAN_BITFIELD) 349 unsigned device_type :5; /* Peripheral Device Type */ 350 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 351 unsigned reserved1_6t0 :7; /* Reserved */ 352 unsigned rmb :1; /* Removable Medium Bit */ 353 unsigned ansi_version :3; /* ANSI Version */ 354 unsigned ecma_version :3; /* ECMA Version */ 355 unsigned iso_version :2; /* ISO Version */ 356 unsigned response_format :4; /* Response Data Format */ 357 unsigned reserved3_45 :2; /* Reserved */ 358 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 359 unsigned reserved3_7 :1; /* AENC - Reserved */ 360#elif defined(__BIG_ENDIAN_BITFIELD) 361 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 362 unsigned device_type :5; /* Peripheral Device Type */ 363 unsigned rmb :1; /* Removable Medium Bit */ 364 unsigned reserved1_6t0 :7; /* Reserved */ 365 unsigned iso_version :2; /* ISO Version */ 366 unsigned ecma_version :3; /* ECMA Version */ 367 unsigned ansi_version :3; /* ANSI Version */ 368 unsigned reserved3_7 :1; /* AENC - Reserved */ 369 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 370 unsigned reserved3_45 :2; /* Reserved */ 371 unsigned response_format :4; /* Response Data Format */ 372#else 373#error "Bitfield endianness not defined! Check your byteorder.h" 374#endif 375 u8 additional_length; /* Additional Length (total_length-4) */ 376 u8 rsv5, rsv6, rsv7; /* Reserved */ 377 u8 vendor_id[8]; /* Vendor Identification */ 378 u8 product_id[16]; /* Product Identification */ 379 u8 revision_level[4]; /* Revision Level */ 380 u8 vendor_specific[20]; /* Vendor Specific - Optional */ 381 u8 reserved56t95[40]; /* Reserved - Optional */ 382 /* Additional information may be returned */ 383} idefloppy_inquiry_result_t; 384 385/* 386 * REQUEST SENSE packet command result - Data Format. 387 */ 388typedef struct { 389#if defined(__LITTLE_ENDIAN_BITFIELD) 390 unsigned error_code :7; /* Current error (0x70) */ 391 unsigned valid :1; /* The information field conforms to SFF-8070i */ 392 u8 reserved1 :8; /* Reserved */ 393 unsigned sense_key :4; /* Sense Key */ 394 unsigned reserved2_4 :1; /* Reserved */ 395 unsigned ili :1; /* Incorrect Length Indicator */ 396 unsigned reserved2_67 :2; 397#elif defined(__BIG_ENDIAN_BITFIELD) 398 unsigned valid :1; /* The information field conforms to SFF-8070i */ 399 unsigned error_code :7; /* Current error (0x70) */ 400 u8 reserved1 :8; /* Reserved */ 401 unsigned reserved2_67 :2; 402 unsigned ili :1; /* Incorrect Length Indicator */ 403 unsigned reserved2_4 :1; /* Reserved */ 404 unsigned sense_key :4; /* Sense Key */ 405#else 406#error "Bitfield endianness not defined! Check your byteorder.h" 407#endif 408 u32 information __attribute__ ((packed)); 409 u8 asl; /* Additional sense length (n-7) */ 410 u32 command_specific; /* Additional command specific information */ 411 u8 asc; /* Additional Sense Code */ 412 u8 ascq; /* Additional Sense Code Qualifier */ 413 u8 replaceable_unit_code; /* Field Replaceable Unit Code */ 414 u8 sksv[3]; 415 u8 pad[2]; /* Padding to 20 bytes */ 416} idefloppy_request_sense_result_t; 417 418/* 419 * Pages of the SELECT SENSE / MODE SENSE packet commands. 420 */ 421#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 422#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 423 424/* 425 * Mode Parameter Header for the MODE SENSE packet command 426 */ 427typedef struct { 428 u16 mode_data_length; /* Length of the following data transfer */ 429 u8 medium_type; /* Medium Type */ 430#if defined(__LITTLE_ENDIAN_BITFIELD) 431 unsigned reserved3 :7; 432 unsigned wp :1; /* Write protect */ 433#elif defined(__BIG_ENDIAN_BITFIELD) 434 unsigned wp :1; /* Write protect */ 435 unsigned reserved3 :7; 436#else 437#error "Bitfield endianness not defined! Check your byteorder.h" 438#endif 439 u8 reserved[4]; 440} idefloppy_mode_parameter_header_t; 441 442static DEFINE_MUTEX(idefloppy_ref_mutex); 443 444#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 445 446#define ide_floppy_g(disk) \ 447 container_of((disk)->private_data, struct ide_floppy_obj, driver) 448 449static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 450{ 451 struct ide_floppy_obj *floppy = NULL; 452 453 mutex_lock(&idefloppy_ref_mutex); 454 floppy = ide_floppy_g(disk); 455 if (floppy) 456 kref_get(&floppy->kref); 457 mutex_unlock(&idefloppy_ref_mutex); 458 return floppy; 459} 460 461static void ide_floppy_release(struct kref *); 462 463static void ide_floppy_put(struct ide_floppy_obj *floppy) 464{ 465 mutex_lock(&idefloppy_ref_mutex); 466 kref_put(&floppy->kref, ide_floppy_release); 467 mutex_unlock(&idefloppy_ref_mutex); 468} 469 470/* 471 * Too bad. The drive wants to send us data which we are not ready to accept. 472 * Just throw it away. 473 */ 474static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 475{ 476 while (bcount--) 477 (void) HWIF(drive)->INB(IDE_DATA_REG); 478} 479 480#if IDEFLOPPY_DEBUG_BUGS 481static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 482{ 483 while (bcount--) 484 HWIF(drive)->OUTB(0, IDE_DATA_REG); 485} 486#endif /* IDEFLOPPY_DEBUG_BUGS */ 487 488 489/* 490 * idefloppy_do_end_request is used to finish servicing a request. 491 * 492 * For read/write requests, we will call ide_end_request to pass to the 493 * next buffer. 494 */ 495static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 496{ 497 idefloppy_floppy_t *floppy = drive->driver_data; 498 struct request *rq = HWGROUP(drive)->rq; 499 int error; 500 501 debug_log(KERN_INFO "Reached idefloppy_end_request\n"); 502 503 switch (uptodate) { 504 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 505 case 1: error = 0; break; 506 default: error = uptodate; 507 } 508 if (error) 509 floppy->failed_pc = NULL; 510 /* Why does this happen? */ 511 if (!rq) 512 return 0; 513 if (!blk_special_request(rq)) { 514 /* our real local end request function */ 515 ide_end_request(drive, uptodate, nsecs); 516 return 0; 517 } 518 rq->errors = error; 519 /* fixme: need to move this local also */ 520 ide_end_drive_cmd(drive, 0, 0); 521 return 0; 522} 523 524static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 525{ 526 struct request *rq = pc->rq; 527 struct bio_vec *bvec; 528 struct req_iterator iter; 529 unsigned long flags; 530 char *data; 531 int count, done = 0; 532 533 rq_for_each_segment(bvec, rq, iter) { 534 if (!bcount) 535 break; 536 537 count = min(bvec->bv_len, bcount); 538 539 data = bvec_kmap_irq(bvec, &flags); 540 drive->hwif->atapi_input_bytes(drive, data, count); 541 bvec_kunmap_irq(data, &flags); 542 543 bcount -= count; 544 pc->b_count += count; 545 done += count; 546 } 547 548 idefloppy_do_end_request(drive, 1, done >> 9); 549 550 if (bcount) { 551 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 552 idefloppy_discard_data(drive, bcount); 553 } 554} 555 556static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 557{ 558 struct request *rq = pc->rq; 559 struct req_iterator iter; 560 struct bio_vec *bvec; 561 unsigned long flags; 562 int count, done = 0; 563 char *data; 564 565 rq_for_each_segment(bvec, rq, iter) { 566 if (!bcount) 567 break; 568 569 count = min(bvec->bv_len, bcount); 570 571 data = bvec_kmap_irq(bvec, &flags); 572 drive->hwif->atapi_output_bytes(drive, data, count); 573 bvec_kunmap_irq(data, &flags); 574 575 bcount -= count; 576 pc->b_count += count; 577 done += count; 578 } 579 580 idefloppy_do_end_request(drive, 1, done >> 9); 581 582#if IDEFLOPPY_DEBUG_BUGS 583 if (bcount) { 584 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 585 idefloppy_write_zeros(drive, bcount); 586 } 587#endif 588} 589 590static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 591{ 592 struct request *rq = pc->rq; 593 struct bio *bio = rq->bio; 594 595 while ((bio = rq->bio) != NULL) 596 idefloppy_do_end_request(drive, 1, 0); 597} 598 599/* 600 * idefloppy_queue_pc_head generates a new packet command request in front 601 * of the request queue, before the current request, so that it will be 602 * processed immediately, on the next pass through the driver. 603 */ 604static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 605{ 606 struct ide_floppy_obj *floppy = drive->driver_data; 607 608 ide_init_drive_cmd(rq); 609 rq->buffer = (char *) pc; 610 rq->cmd_type = REQ_TYPE_SPECIAL; 611 rq->rq_disk = floppy->disk; 612 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 613} 614 615static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 616{ 617 idefloppy_floppy_t *floppy = drive->driver_data; 618 619 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 620 floppy->pc_stack_index=0; 621 return (&floppy->pc_stack[floppy->pc_stack_index++]); 622} 623 624static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 625{ 626 idefloppy_floppy_t *floppy = drive->driver_data; 627 628 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 629 floppy->rq_stack_index = 0; 630 return (&floppy->rq_stack[floppy->rq_stack_index++]); 631} 632 633/* 634 * idefloppy_analyze_error is called on each failed packet command retry 635 * to analyze the request sense. 636 */ 637static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) 638{ 639 idefloppy_floppy_t *floppy = drive->driver_data; 640 641 floppy->sense_key = result->sense_key; 642 floppy->asc = result->asc; 643 floppy->ascq = result->ascq; 644 floppy->progress_indication = result->sksv[0] & 0x80 ? 645 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; 646 if (floppy->failed_pc) 647 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " 648 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], 649 result->sense_key, result->asc, result->ascq); 650 else 651 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " 652 "ascq = %x\n", result->sense_key, 653 result->asc, result->ascq); 654} 655 656static void idefloppy_request_sense_callback (ide_drive_t *drive) 657{ 658 idefloppy_floppy_t *floppy = drive->driver_data; 659 660 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 661 662 if (!floppy->pc->error) { 663 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); 664 idefloppy_do_end_request(drive, 1, 0); 665 } else { 666 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); 667 idefloppy_do_end_request(drive, 0, 0); 668 } 669} 670 671/* 672 * General packet command callback function. 673 */ 674static void idefloppy_pc_callback (ide_drive_t *drive) 675{ 676 idefloppy_floppy_t *floppy = drive->driver_data; 677 678 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 679 680 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 681} 682 683/* 684 * idefloppy_init_pc initializes a packet command. 685 */ 686static void idefloppy_init_pc (idefloppy_pc_t *pc) 687{ 688 memset(pc->c, 0, 12); 689 pc->retries = 0; 690 pc->flags = 0; 691 pc->request_transfer = 0; 692 pc->buffer = pc->pc_buffer; 693 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 694 pc->callback = &idefloppy_pc_callback; 695} 696 697static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 698{ 699 idefloppy_init_pc(pc); 700 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; 701 pc->c[4] = 255; 702 pc->request_transfer = 18; 703 pc->callback = &idefloppy_request_sense_callback; 704} 705 706/* 707 * idefloppy_retry_pc is called when an error was detected during the 708 * last packet command. We queue a request sense packet command in 709 * the head of the request list. 710 */ 711static void idefloppy_retry_pc (ide_drive_t *drive) 712{ 713 idefloppy_pc_t *pc; 714 struct request *rq; 715 716 (void)drive->hwif->INB(IDE_ERROR_REG); 717 pc = idefloppy_next_pc_storage(drive); 718 rq = idefloppy_next_rq_storage(drive); 719 idefloppy_create_request_sense_cmd(pc); 720 idefloppy_queue_pc_head(drive, pc, rq); 721} 722 723/* 724 * idefloppy_pc_intr is the usual interrupt handler which will be called 725 * during a packet command. 726 */ 727static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 728{ 729 idefloppy_floppy_t *floppy = drive->driver_data; 730 ide_hwif_t *hwif = drive->hwif; 731 idefloppy_pc_t *pc = floppy->pc; 732 struct request *rq = pc->rq; 733 unsigned int temp; 734 u16 bcount; 735 u8 stat, ireason; 736 737 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", 738 __FUNCTION__); 739 740 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 741 if (HWIF(drive)->ide_dma_end(drive)) { 742 set_bit(PC_DMA_ERROR, &pc->flags); 743 } else { 744 pc->actually_transferred = pc->request_transfer; 745 idefloppy_update_buffers(drive, pc); 746 } 747 debug_log(KERN_INFO "ide-floppy: DMA finished\n"); 748 } 749 750 /* Clear the interrupt */ 751 stat = drive->hwif->INB(IDE_STATUS_REG); 752 753 if ((stat & DRQ_STAT) == 0) { /* No more interrupts */ 754 debug_log(KERN_INFO "Packet command completed, %d bytes " 755 "transferred\n", pc->actually_transferred); 756 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 757 758 local_irq_enable_in_hardirq(); 759 760 if ((stat & ERR_STAT) || test_bit(PC_DMA_ERROR, &pc->flags)) { 761 /* Error detected */ 762 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", 763 drive->name); 764 rq->errors++; 765 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 766 printk(KERN_ERR "ide-floppy: I/O error in " 767 "request sense command\n"); 768 return ide_do_reset(drive); 769 } 770 /* Retry operation */ 771 idefloppy_retry_pc(drive); 772 /* queued, but not started */ 773 return ide_stopped; 774 } 775 pc->error = 0; 776 if (floppy->failed_pc == pc) 777 floppy->failed_pc = NULL; 778 /* Command finished - Call the callback function */ 779 pc->callback(drive); 780 return ide_stopped; 781 } 782 783 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 784 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 785 "more interrupts in DMA mode\n"); 786 ide_dma_off(drive); 787 return ide_do_reset(drive); 788 } 789 790 /* Get the number of bytes to transfer */ 791 bcount = (hwif->INB(IDE_BCOUNTH_REG) << 8) | 792 hwif->INB(IDE_BCOUNTL_REG); 793 /* on this interrupt */ 794 ireason = hwif->INB(IDE_IREASON_REG); 795 796 if (ireason & CD) { 797 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 798 return ide_do_reset(drive); 799 } 800 if (((ireason & IO) == IO) == test_bit(PC_WRITING, &pc->flags)) { 801 /* Hopefully, we will never get here */ 802 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 803 (ireason & IO) ? "Write" : "Read"); 804 printk(KERN_ERR "but the floppy wants us to %s !\n", 805 (ireason & IO) ? "Read" : "Write"); 806 return ide_do_reset(drive); 807 } 808 if (!test_bit(PC_WRITING, &pc->flags)) { 809 /* Reading - Check that we have enough space */ 810 temp = pc->actually_transferred + bcount; 811 if (temp > pc->request_transfer) { 812 if (temp > pc->buffer_size) { 813 printk(KERN_ERR "ide-floppy: The floppy wants " 814 "to send us more data than expected " 815 "- discarding data\n"); 816 idefloppy_discard_data(drive, bcount); 817 BUG_ON(HWGROUP(drive)->handler != NULL); 818 ide_set_handler(drive, 819 &idefloppy_pc_intr, 820 IDEFLOPPY_WAIT_CMD, 821 NULL); 822 return ide_started; 823 } 824 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " 825 "send us more data than expected - " 826 "allowing transfer\n"); 827 } 828 } 829 if (test_bit(PC_WRITING, &pc->flags)) { 830 if (pc->buffer != NULL) 831 /* Write the current buffer */ 832 hwif->atapi_output_bytes(drive, pc->current_position, 833 bcount); 834 else 835 idefloppy_output_buffers(drive, pc, bcount); 836 } else { 837 if (pc->buffer != NULL) 838 /* Read the current buffer */ 839 hwif->atapi_input_bytes(drive, pc->current_position, 840 bcount); 841 else 842 idefloppy_input_buffers(drive, pc, bcount); 843 } 844 /* Update the current position */ 845 pc->actually_transferred += bcount; 846 pc->current_position += bcount; 847 848 BUG_ON(HWGROUP(drive)->handler != NULL); 849 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 850 return ide_started; 851} 852 853/* 854 * This is the original routine that did the packet transfer. 855 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 856 * for that drive below. The algorithm is chosen based on drive type 857 */ 858static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 859{ 860 ide_startstop_t startstop; 861 idefloppy_floppy_t *floppy = drive->driver_data; 862 u8 ireason; 863 864 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 865 printk(KERN_ERR "ide-floppy: Strange, packet command " 866 "initiated yet DRQ isn't asserted\n"); 867 return startstop; 868 } 869 ireason = drive->hwif->INB(IDE_IREASON_REG); 870 if ((ireason & CD) == 0 || (ireason & IO)) { 871 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 872 "issuing a packet command\n"); 873 return ide_do_reset(drive); 874 } 875 BUG_ON(HWGROUP(drive)->handler != NULL); 876 /* Set the interrupt routine */ 877 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 878 /* Send the actual packet */ 879 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 880 return ide_started; 881} 882 883 884/* 885 * What we have here is a classic case of a top half / bottom half 886 * interrupt service routine. In interrupt mode, the device sends 887 * an interrupt to signal it's ready to receive a packet. However, 888 * we need to delay about 2-3 ticks before issuing the packet or we 889 * gets in trouble. 890 * 891 * So, follow carefully. transfer_pc1 is called as an interrupt (or 892 * directly). In either case, when the device says it's ready for a 893 * packet, we schedule the packet transfer to occur about 2-3 ticks 894 * later in transfer_pc2. 895 */ 896static int idefloppy_transfer_pc2 (ide_drive_t *drive) 897{ 898 idefloppy_floppy_t *floppy = drive->driver_data; 899 900 /* Send the actual packet */ 901 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 902 /* Timeout for the packet command */ 903 return IDEFLOPPY_WAIT_CMD; 904} 905 906static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 907{ 908 idefloppy_floppy_t *floppy = drive->driver_data; 909 ide_startstop_t startstop; 910 u8 ireason; 911 912 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 913 printk(KERN_ERR "ide-floppy: Strange, packet command " 914 "initiated yet DRQ isn't asserted\n"); 915 return startstop; 916 } 917 ireason = drive->hwif->INB(IDE_IREASON_REG); 918 if ((ireason & CD) == 0 || (ireason & IO)) { 919 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 920 "while issuing a packet command\n"); 921 return ide_do_reset(drive); 922 } 923 /* 924 * The following delay solves a problem with ATAPI Zip 100 drives 925 * where the Busy flag was apparently being deasserted before the 926 * unit was ready to receive data. This was happening on a 927 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 928 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 929 * used until after the packet is moved in about 50 msec. 930 */ 931 BUG_ON(HWGROUP(drive)->handler != NULL); 932 ide_set_handler(drive, 933 &idefloppy_pc_intr, /* service routine for packet command */ 934 floppy->ticks, /* wait this long before "failing" */ 935 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 936 return ide_started; 937} 938 939/** 940 * idefloppy_should_report_error() 941 * 942 * Supresses error messages resulting from Medium not present 943 */ 944static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 945{ 946 if (floppy->sense_key == 0x02 && 947 floppy->asc == 0x3a && 948 floppy->ascq == 0x00) 949 return 0; 950 return 1; 951} 952 953/* 954 * Issue a packet command 955 */ 956static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 957{ 958 idefloppy_floppy_t *floppy = drive->driver_data; 959 ide_hwif_t *hwif = drive->hwif; 960 ide_handler_t *pkt_xfer_routine; 961 u16 bcount; 962 u8 dma; 963 964 if (floppy->failed_pc == NULL && 965 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) 966 floppy->failed_pc = pc; 967 /* Set the current packet command */ 968 floppy->pc = pc; 969 970 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 971 test_bit(PC_ABORT, &pc->flags)) { 972 /* 973 * We will "abort" retrying a packet command in case 974 * a legitimate error code was received. 975 */ 976 if (!test_bit(PC_ABORT, &pc->flags)) { 977 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 978 if (idefloppy_should_report_error(floppy)) 979 printk(KERN_ERR "ide-floppy: %s: I/O error, " 980 "pc = %2x, key = %2x, " 981 "asc = %2x, ascq = %2x\n", 982 drive->name, pc->c[0], 983 floppy->sense_key, 984 floppy->asc, floppy->ascq); 985 } 986 /* Giving up */ 987 pc->error = IDEFLOPPY_ERROR_GENERAL; 988 } 989 floppy->failed_pc = NULL; 990 pc->callback(drive); 991 return ide_stopped; 992 } 993 994 debug_log(KERN_INFO "Retry number - %d\n",pc->retries); 995 996 pc->retries++; 997 /* We haven't transferred any data yet */ 998 pc->actually_transferred = 0; 999 pc->current_position = pc->buffer; 1000 bcount = min(pc->request_transfer, 63 * 1024); 1001 1002 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) 1003 ide_dma_off(drive); 1004 1005 dma = 0; 1006 1007 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 1008 dma = !hwif->dma_setup(drive); 1009 1010 ide_pktcmd_tf_load(drive, IDE_TFLAG_NO_SELECT_MASK | 1011 IDE_TFLAG_OUT_DEVICE, bcount, dma); 1012 1013 if (dma) { /* Begin DMA, if necessary */ 1014 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 1015 hwif->dma_start(drive); 1016 } 1017 1018 /* Can we transfer the packet when we get the interrupt or wait? */ 1019 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 1020 /* wait */ 1021 pkt_xfer_routine = &idefloppy_transfer_pc1; 1022 } else { 1023 /* immediate */ 1024 pkt_xfer_routine = &idefloppy_transfer_pc; 1025 } 1026 1027 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 1028 /* Issue the packet command */ 1029 ide_execute_command(drive, WIN_PACKETCMD, 1030 pkt_xfer_routine, 1031 IDEFLOPPY_WAIT_CMD, 1032 NULL); 1033 return ide_started; 1034 } else { 1035 /* Issue the packet command */ 1036 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 1037 return (*pkt_xfer_routine) (drive); 1038 } 1039} 1040 1041static void idefloppy_rw_callback (ide_drive_t *drive) 1042{ 1043 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); 1044 1045 idefloppy_do_end_request(drive, 1, 0); 1046 return; 1047} 1048 1049static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 1050{ 1051 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " 1052 "prevent = %d\n", prevent); 1053 1054 idefloppy_init_pc(pc); 1055 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; 1056 pc->c[4] = prevent; 1057} 1058 1059static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 1060{ 1061 idefloppy_init_pc(pc); 1062 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; 1063 pc->c[7] = 255; 1064 pc->c[8] = 255; 1065 pc->request_transfer = 255; 1066} 1067 1068static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 1069 int flags) 1070{ 1071 idefloppy_init_pc(pc); 1072 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; 1073 pc->c[1] = 0x17; 1074 1075 memset(pc->buffer, 0, 12); 1076 pc->buffer[1] = 0xA2; 1077 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 1078 1079 if (flags & 1) /* Verify bit on... */ 1080 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 1081 pc->buffer[3] = 8; 1082 1083 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); 1084 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); 1085 pc->buffer_size=12; 1086 set_bit(PC_WRITING, &pc->flags); 1087} 1088 1089/* 1090 * A mode sense command is used to "sense" floppy parameters. 1091 */ 1092static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 1093{ 1094 u16 length = sizeof(idefloppy_mode_parameter_header_t); 1095 1096 idefloppy_init_pc(pc); 1097 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; 1098 pc->c[1] = 0; 1099 pc->c[2] = page_code + (type << 6); 1100 1101 switch (page_code) { 1102 case IDEFLOPPY_CAPABILITIES_PAGE: 1103 length += 12; 1104 break; 1105 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 1106 length += 32; 1107 break; 1108 default: 1109 printk(KERN_ERR "ide-floppy: unsupported page code " 1110 "in create_mode_sense_cmd\n"); 1111 } 1112 put_unaligned(htons(length), (u16 *) &pc->c[7]); 1113 pc->request_transfer = length; 1114} 1115 1116static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 1117{ 1118 idefloppy_init_pc(pc); 1119 pc->c[0] = IDEFLOPPY_START_STOP_CMD; 1120 pc->c[4] = start; 1121} 1122 1123static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 1124{ 1125 idefloppy_init_pc(pc); 1126 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; 1127} 1128 1129static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 1130{ 1131 int block = sector / floppy->bs_factor; 1132 int blocks = rq->nr_sectors / floppy->bs_factor; 1133 int cmd = rq_data_dir(rq); 1134 1135 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 1136 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 1137 block, blocks); 1138 1139 idefloppy_init_pc(pc); 1140 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 1141 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; 1142 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); 1143 } else { 1144 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; 1145 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); 1146 } 1147 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); 1148 pc->callback = &idefloppy_rw_callback; 1149 pc->rq = rq; 1150 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 1151 if (rq->cmd_flags & REQ_RW) 1152 set_bit(PC_WRITING, &pc->flags); 1153 pc->buffer = NULL; 1154 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 1155 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1156} 1157 1158static void 1159idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 1160{ 1161 idefloppy_init_pc(pc); 1162 pc->callback = &idefloppy_rw_callback; 1163 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 1164 pc->rq = rq; 1165 pc->b_count = rq->data_len; 1166 if (rq->data_len && rq_data_dir(rq) == WRITE) 1167 set_bit(PC_WRITING, &pc->flags); 1168 pc->buffer = rq->data; 1169 if (rq->bio) 1170 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1171 1172 /* 1173 * possibly problematic, doesn't look like ide-floppy correctly 1174 * handled scattered requests if dma fails... 1175 */ 1176 pc->request_transfer = pc->buffer_size = rq->data_len; 1177} 1178 1179/* 1180 * idefloppy_do_request is our request handling function. 1181 */ 1182static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1183{ 1184 idefloppy_floppy_t *floppy = drive->driver_data; 1185 idefloppy_pc_t *pc; 1186 unsigned long block = (unsigned long)block_s; 1187 1188 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n", 1189 rq->rq_disk ? rq->rq_disk->disk_name : "?", 1190 rq->flags, rq->errors); 1191 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " 1192 "current_nr_sectors: %d\n", (long)rq->sector, 1193 rq->nr_sectors, rq->current_nr_sectors); 1194 1195 if (rq->errors >= ERROR_MAX) { 1196 if (floppy->failed_pc != NULL) { 1197 if (idefloppy_should_report_error(floppy)) 1198 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1199 " key = %2x, asc = %2x, ascq = %2x\n", 1200 drive->name, floppy->failed_pc->c[0], 1201 floppy->sense_key, floppy->asc, floppy->ascq); 1202 } 1203 else 1204 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1205 drive->name); 1206 idefloppy_do_end_request(drive, 0, 0); 1207 return ide_stopped; 1208 } 1209 if (blk_fs_request(rq)) { 1210 if (((long)rq->sector % floppy->bs_factor) || 1211 (rq->nr_sectors % floppy->bs_factor)) { 1212 printk("%s: unsupported r/w request size\n", 1213 drive->name); 1214 idefloppy_do_end_request(drive, 0, 0); 1215 return ide_stopped; 1216 } 1217 pc = idefloppy_next_pc_storage(drive); 1218 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1219 } else if (blk_special_request(rq)) { 1220 pc = (idefloppy_pc_t *) rq->buffer; 1221 } else if (blk_pc_request(rq)) { 1222 pc = idefloppy_next_pc_storage(drive); 1223 idefloppy_blockpc_cmd(floppy, pc, rq); 1224 } else { 1225 blk_dump_rq_flags(rq, 1226 "ide-floppy: unsupported command in queue"); 1227 idefloppy_do_end_request(drive, 0, 0); 1228 return ide_stopped; 1229 } 1230 1231 pc->rq = rq; 1232 return idefloppy_issue_pc(drive, pc); 1233} 1234 1235/* 1236 * idefloppy_queue_pc_tail adds a special packet command request to the 1237 * tail of the request queue, and waits for it to be serviced. 1238 */ 1239static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1240{ 1241 struct ide_floppy_obj *floppy = drive->driver_data; 1242 struct request rq; 1243 1244 ide_init_drive_cmd (&rq); 1245 rq.buffer = (char *) pc; 1246 rq.cmd_type = REQ_TYPE_SPECIAL; 1247 rq.rq_disk = floppy->disk; 1248 1249 return ide_do_drive_cmd(drive, &rq, ide_wait); 1250} 1251 1252/* 1253 * Look at the flexible disk page parameters. We will ignore the CHS 1254 * capacity parameters and use the LBA parameters instead. 1255 */ 1256static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) 1257{ 1258 idefloppy_floppy_t *floppy = drive->driver_data; 1259 idefloppy_pc_t pc; 1260 idefloppy_mode_parameter_header_t *header; 1261 idefloppy_flexible_disk_page_t *page; 1262 int capacity, lba_capacity; 1263 1264 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); 1265 if (idefloppy_queue_pc_tail(drive,&pc)) { 1266 printk(KERN_ERR "ide-floppy: Can't get flexible disk " 1267 "page parameters\n"); 1268 return 1; 1269 } 1270 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1271 floppy->wp = header->wp; 1272 set_disk_ro(floppy->disk, floppy->wp); 1273 page = (idefloppy_flexible_disk_page_t *) (header + 1); 1274 1275 page->transfer_rate = ntohs(page->transfer_rate); 1276 page->sector_size = ntohs(page->sector_size); 1277 page->cyls = ntohs(page->cyls); 1278 page->rpm = ntohs(page->rpm); 1279 capacity = page->cyls * page->heads * page->sectors * page->sector_size; 1280 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) 1281 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1282 "%d sector size, %d rpm\n", 1283 drive->name, capacity / 1024, page->cyls, 1284 page->heads, page->sectors, 1285 page->transfer_rate / 8, page->sector_size, page->rpm); 1286 1287 floppy->flexible_disk_page = *page; 1288 drive->bios_cyl = page->cyls; 1289 drive->bios_head = page->heads; 1290 drive->bios_sect = page->sectors; 1291 lba_capacity = floppy->blocks * floppy->block_size; 1292 if (capacity < lba_capacity) { 1293 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1294 "bytes, but the drive only handles %d\n", 1295 drive->name, lba_capacity, capacity); 1296 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; 1297 } 1298 return 0; 1299} 1300 1301static int idefloppy_get_capability_page(ide_drive_t *drive) 1302{ 1303 idefloppy_floppy_t *floppy = drive->driver_data; 1304 idefloppy_pc_t pc; 1305 idefloppy_mode_parameter_header_t *header; 1306 idefloppy_capabilities_page_t *page; 1307 1308 floppy->srfp = 0; 1309 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1310 MODE_SENSE_CURRENT); 1311 1312 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1313 if (idefloppy_queue_pc_tail(drive,&pc)) { 1314 return 1; 1315 } 1316 1317 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1318 page= (idefloppy_capabilities_page_t *)(header+1); 1319 floppy->srfp = page->srfp; 1320 return (0); 1321} 1322 1323/* 1324 * Determine if a media is present in the floppy drive, and if so, 1325 * its LBA capacity. 1326 */ 1327static int idefloppy_get_capacity (ide_drive_t *drive) 1328{ 1329 idefloppy_floppy_t *floppy = drive->driver_data; 1330 idefloppy_pc_t pc; 1331 idefloppy_capacity_header_t *header; 1332 idefloppy_capacity_descriptor_t *descriptor; 1333 int i, descriptors, rc = 1, blocks, length; 1334 1335 drive->bios_cyl = 0; 1336 drive->bios_head = drive->bios_sect = 0; 1337 floppy->blocks = 0; 1338 floppy->bs_factor = 1; 1339 set_capacity(floppy->disk, 0); 1340 1341 idefloppy_create_read_capacity_cmd(&pc); 1342 if (idefloppy_queue_pc_tail(drive, &pc)) { 1343 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1344 return 1; 1345 } 1346 header = (idefloppy_capacity_header_t *) pc.buffer; 1347 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1348 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1349 1350 for (i = 0; i < descriptors; i++, descriptor++) { 1351 blocks = descriptor->blocks = ntohl(descriptor->blocks); 1352 length = descriptor->length = ntohs(descriptor->length); 1353 1354 if (!i) 1355 { 1356 switch (descriptor->dc) { 1357 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1358 case CAPACITY_UNFORMATTED: 1359 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1360 /* 1361 * If it is not a clik drive, break out 1362 * (maintains previous driver behaviour) 1363 */ 1364 break; 1365 case CAPACITY_CURRENT: 1366 /* Normal Zip/LS-120 disks */ 1367 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1368 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1369 "sector size\n", drive->name, 1370 blocks * length / 1024, blocks, length); 1371 floppy->capacity = *descriptor; 1372 if (!length || length % 512) { 1373 printk(KERN_NOTICE "%s: %d bytes block size " 1374 "not supported\n", drive->name, length); 1375 } else { 1376 floppy->blocks = blocks; 1377 floppy->block_size = length; 1378 if ((floppy->bs_factor = length / 512) != 1) 1379 printk(KERN_NOTICE "%s: warning: non " 1380 "512 bytes block size not " 1381 "fully supported\n", 1382 drive->name); 1383 rc = 0; 1384 } 1385 break; 1386 case CAPACITY_NO_CARTRIDGE: 1387 /* 1388 * This is a KERN_ERR so it appears on screen 1389 * for the user to see 1390 */ 1391 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1392 break; 1393 case CAPACITY_INVALID: 1394 printk(KERN_ERR "%s: Invalid capacity for disk " 1395 "in drive\n", drive->name); 1396 break; 1397 } 1398 } 1399 if (!i) { 1400 debug_log( "Descriptor 0 Code: %d\n", 1401 descriptor->dc); 1402 } 1403 debug_log( "Descriptor %d: %dkB, %d blocks, %d " 1404 "sector size\n", i, blocks * length / 1024, blocks, 1405 length); 1406 } 1407 1408 /* Clik! disk does not support get_flexible_disk_page */ 1409 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1410 (void) idefloppy_get_flexible_disk_page(drive); 1411 } 1412 1413 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1414 return rc; 1415} 1416 1417/* 1418** Obtain the list of formattable capacities. 1419** Very similar to idefloppy_get_capacity, except that we push the capacity 1420** descriptors to userland, instead of our own structures. 1421** 1422** Userland gives us the following structure: 1423** 1424** struct idefloppy_format_capacities { 1425** int nformats; 1426** struct { 1427** int nblocks; 1428** int blocksize; 1429** } formats[]; 1430** } ; 1431** 1432** userland initializes nformats to the number of allocated formats[] 1433** records. On exit we set nformats to the number of records we've 1434** actually initialized. 1435** 1436*/ 1437 1438static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1439{ 1440 idefloppy_pc_t pc; 1441 idefloppy_capacity_header_t *header; 1442 idefloppy_capacity_descriptor_t *descriptor; 1443 int i, descriptors, blocks, length; 1444 int u_array_size; 1445 int u_index; 1446 int __user *argp; 1447 1448 if (get_user(u_array_size, arg)) 1449 return (-EFAULT); 1450 1451 if (u_array_size <= 0) 1452 return (-EINVAL); 1453 1454 idefloppy_create_read_capacity_cmd(&pc); 1455 if (idefloppy_queue_pc_tail(drive, &pc)) { 1456 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1457 return (-EIO); 1458 } 1459 header = (idefloppy_capacity_header_t *) pc.buffer; 1460 descriptors = header->length / 1461 sizeof(idefloppy_capacity_descriptor_t); 1462 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1463 1464 u_index = 0; 1465 argp = arg + 1; 1466 1467 /* 1468 ** We always skip the first capacity descriptor. That's the 1469 ** current capacity. We are interested in the remaining descriptors, 1470 ** the formattable capacities. 1471 */ 1472 1473 for (i=0; i<descriptors; i++, descriptor++) { 1474 if (u_index >= u_array_size) 1475 break; /* User-supplied buffer too small */ 1476 if (i == 0) 1477 continue; /* Skip the first descriptor */ 1478 1479 blocks = ntohl(descriptor->blocks); 1480 length = ntohs(descriptor->length); 1481 1482 if (put_user(blocks, argp)) 1483 return(-EFAULT); 1484 ++argp; 1485 1486 if (put_user(length, argp)) 1487 return (-EFAULT); 1488 ++argp; 1489 1490 ++u_index; 1491 } 1492 1493 if (put_user(u_index, arg)) 1494 return (-EFAULT); 1495 return (0); 1496} 1497 1498/* 1499** Send ATAPI_FORMAT_UNIT to the drive. 1500** 1501** Userland gives us the following structure: 1502** 1503** struct idefloppy_format_command { 1504** int nblocks; 1505** int blocksize; 1506** int flags; 1507** } ; 1508** 1509** flags is a bitmask, currently, the only defined flag is: 1510** 1511** 0x01 - verify media after format. 1512*/ 1513 1514static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1515{ 1516 int blocks; 1517 int length; 1518 int flags; 1519 idefloppy_pc_t pc; 1520 1521 if (get_user(blocks, arg) || 1522 get_user(length, arg+1) || 1523 get_user(flags, arg+2)) { 1524 return (-EFAULT); 1525 } 1526 1527 /* Get the SFRP bit */ 1528 (void) idefloppy_get_capability_page(drive); 1529 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1530 if (idefloppy_queue_pc_tail(drive, &pc)) { 1531 return (-EIO); 1532 } 1533 1534 return (0); 1535} 1536 1537/* 1538** Get ATAPI_FORMAT_UNIT progress indication. 1539** 1540** Userland gives a pointer to an int. The int is set to a progress 1541** indicator 0-65536, with 65536=100%. 1542** 1543** If the drive does not support format progress indication, we just check 1544** the dsc bit, and return either 0 or 65536. 1545*/ 1546 1547static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1548{ 1549 idefloppy_floppy_t *floppy = drive->driver_data; 1550 idefloppy_pc_t pc; 1551 int progress_indication = 0x10000; 1552 1553 if (floppy->srfp) { 1554 idefloppy_create_request_sense_cmd(&pc); 1555 if (idefloppy_queue_pc_tail(drive, &pc)) { 1556 return (-EIO); 1557 } 1558 1559 if (floppy->sense_key == 2 && 1560 floppy->asc == 4 && 1561 floppy->ascq == 4) { 1562 progress_indication = floppy->progress_indication; 1563 } 1564 /* Else assume format_unit has finished, and we're 1565 ** at 0x10000 */ 1566 } else { 1567 unsigned long flags; 1568 u8 stat; 1569 1570 local_irq_save(flags); 1571 stat = drive->hwif->INB(IDE_STATUS_REG); 1572 local_irq_restore(flags); 1573 1574 progress_indication = ((stat & SEEK_STAT) == 0) ? 0 : 0x10000; 1575 } 1576 if (put_user(progress_indication, arg)) 1577 return (-EFAULT); 1578 1579 return (0); 1580} 1581 1582/* 1583 * Return the current floppy capacity. 1584 */ 1585static sector_t idefloppy_capacity (ide_drive_t *drive) 1586{ 1587 idefloppy_floppy_t *floppy = drive->driver_data; 1588 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1589 1590 return capacity; 1591} 1592 1593/* 1594 * idefloppy_identify_device checks if we can support a drive, 1595 * based on the ATAPI IDENTIFY command results. 1596 */ 1597static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1598{ 1599 struct idefloppy_id_gcw gcw; 1600#if IDEFLOPPY_DEBUG_INFO 1601 char buffer[80]; 1602#endif /* IDEFLOPPY_DEBUG_INFO */ 1603 1604 *((u16 *) &gcw) = id->config; 1605 1606#ifdef CONFIG_PPC 1607 /* kludge for Apple PowerBook internal zip */ 1608 if ((gcw.device_type == 5) && 1609 !strstr(id->model, "CD-ROM") && 1610 strstr(id->model, "ZIP")) 1611 gcw.device_type = 0; 1612#endif 1613 1614#if IDEFLOPPY_DEBUG_INFO 1615 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1616 switch (gcw.protocol) { 1617 case 0: case 1: sprintf(buffer, "ATA");break; 1618 case 2: sprintf(buffer, "ATAPI");break; 1619 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1620 } 1621 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1622 switch (gcw.device_type) { 1623 case 0: sprintf(buffer, "Direct-access Device");break; 1624 case 1: sprintf(buffer, "Streaming Tape Device");break; 1625 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1626 case 5: sprintf(buffer, "CD-ROM Device");break; 1627 case 6: sprintf(buffer, "Reserved"); 1628 case 7: sprintf(buffer, "Optical memory Device");break; 1629 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1630 default: sprintf(buffer, "Reserved"); 1631 } 1632 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1633 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1634 switch (gcw.drq_type) { 1635 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1636 case 1: sprintf(buffer, "Interrupt DRQ");break; 1637 case 2: sprintf(buffer, "Accelerated DRQ");break; 1638 case 3: sprintf(buffer, "Reserved");break; 1639 } 1640 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1641 switch (gcw.packet_size) { 1642 case 0: sprintf(buffer, "12 bytes");break; 1643 case 1: sprintf(buffer, "16 bytes");break; 1644 default: sprintf(buffer, "Reserved");break; 1645 } 1646 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1647#endif /* IDEFLOPPY_DEBUG_INFO */ 1648 1649 if (gcw.protocol != 2) 1650 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1651 else if (gcw.device_type != 0) 1652 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1653 else if (!gcw.removable) 1654 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1655 else if (gcw.drq_type == 3) { 1656 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1657 } else if (gcw.packet_size != 0) { 1658 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1659 } else 1660 return 1; 1661 return 0; 1662} 1663 1664#ifdef CONFIG_IDE_PROC_FS 1665static void idefloppy_add_settings(ide_drive_t *drive) 1666{ 1667 idefloppy_floppy_t *floppy = drive->driver_data; 1668 1669/* 1670 * drive setting name read/write data type min max mul_factor div_factor data pointer set function 1671 */ 1672 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1673 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1674 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1675 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1676} 1677#else 1678static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1679#endif 1680 1681/* 1682 * Driver initialization. 1683 */ 1684static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1685{ 1686 struct idefloppy_id_gcw gcw; 1687 1688 *((u16 *) &gcw) = drive->id->config; 1689 floppy->pc = floppy->pc_stack; 1690 if (gcw.drq_type == 1) 1691 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1692 /* 1693 * We used to check revisions here. At this point however 1694 * I'm giving up. Just assume they are all broken, its easier. 1695 * 1696 * The actual reason for the workarounds was likely 1697 * a driver bug after all rather than a firmware bug, 1698 * and the workaround below used to hide it. It should 1699 * be fixed as of version 1.9, but to be on the safe side 1700 * we'll leave the limitation below for the 2.2.x tree. 1701 */ 1702 1703 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1704 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1705 /* This value will be visible in the /proc/ide/hdx/settings */ 1706 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1707 blk_queue_max_sectors(drive->queue, 64); 1708 } 1709 1710 /* 1711 * Guess what? The IOMEGA Clik! drive also needs the 1712 * above fix. It makes nasty clicking noises without 1713 * it, so please don't remove this. 1714 */ 1715 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1716 blk_queue_max_sectors(drive->queue, 64); 1717 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1718 } 1719 1720 1721 (void) idefloppy_get_capacity(drive); 1722 idefloppy_add_settings(drive); 1723} 1724 1725static void ide_floppy_remove(ide_drive_t *drive) 1726{ 1727 idefloppy_floppy_t *floppy = drive->driver_data; 1728 struct gendisk *g = floppy->disk; 1729 1730 ide_proc_unregister_driver(drive, floppy->driver); 1731 1732 del_gendisk(g); 1733 1734 ide_floppy_put(floppy); 1735} 1736 1737static void ide_floppy_release(struct kref *kref) 1738{ 1739 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1740 ide_drive_t *drive = floppy->drive; 1741 struct gendisk *g = floppy->disk; 1742 1743 drive->driver_data = NULL; 1744 g->private_data = NULL; 1745 put_disk(g); 1746 kfree(floppy); 1747} 1748 1749#ifdef CONFIG_IDE_PROC_FS 1750static int proc_idefloppy_read_capacity 1751 (char *page, char **start, off_t off, int count, int *eof, void *data) 1752{ 1753 ide_drive_t*drive = (ide_drive_t *)data; 1754 int len; 1755 1756 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1757 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1758} 1759 1760static ide_proc_entry_t idefloppy_proc[] = { 1761 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1762 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1763 { NULL, 0, NULL, NULL } 1764}; 1765#endif /* CONFIG_IDE_PROC_FS */ 1766 1767static int ide_floppy_probe(ide_drive_t *); 1768 1769static ide_driver_t idefloppy_driver = { 1770 .gen_driver = { 1771 .owner = THIS_MODULE, 1772 .name = "ide-floppy", 1773 .bus = &ide_bus_type, 1774 }, 1775 .probe = ide_floppy_probe, 1776 .remove = ide_floppy_remove, 1777 .version = IDEFLOPPY_VERSION, 1778 .media = ide_floppy, 1779 .supports_dsc_overlap = 0, 1780 .do_request = idefloppy_do_request, 1781 .end_request = idefloppy_do_end_request, 1782 .error = __ide_error, 1783 .abort = __ide_abort, 1784#ifdef CONFIG_IDE_PROC_FS 1785 .proc = idefloppy_proc, 1786#endif 1787}; 1788 1789static int idefloppy_open(struct inode *inode, struct file *filp) 1790{ 1791 struct gendisk *disk = inode->i_bdev->bd_disk; 1792 struct ide_floppy_obj *floppy; 1793 ide_drive_t *drive; 1794 idefloppy_pc_t pc; 1795 int ret = 0; 1796 1797 debug_log(KERN_INFO "Reached idefloppy_open\n"); 1798 1799 if (!(floppy = ide_floppy_get(disk))) 1800 return -ENXIO; 1801 1802 drive = floppy->drive; 1803 1804 floppy->openers++; 1805 1806 if (floppy->openers == 1) { 1807 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1808 /* Just in case */ 1809 1810 idefloppy_create_test_unit_ready_cmd(&pc); 1811 if (idefloppy_queue_pc_tail(drive, &pc)) { 1812 idefloppy_create_start_stop_cmd(&pc, 1); 1813 (void) idefloppy_queue_pc_tail(drive, &pc); 1814 } 1815 1816 if (idefloppy_get_capacity (drive) 1817 && (filp->f_flags & O_NDELAY) == 0 1818 /* 1819 ** Allow O_NDELAY to open a drive without a disk, or with 1820 ** an unreadable disk, so that we can get the format 1821 ** capacity of the drive or begin the format - Sam 1822 */ 1823 ) { 1824 ret = -EIO; 1825 goto out_put_floppy; 1826 } 1827 1828 if (floppy->wp && (filp->f_mode & 2)) { 1829 ret = -EROFS; 1830 goto out_put_floppy; 1831 } 1832 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1833 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1834 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1835 idefloppy_create_prevent_cmd(&pc, 1); 1836 (void) idefloppy_queue_pc_tail(drive, &pc); 1837 } 1838 check_disk_change(inode->i_bdev); 1839 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1840 ret = -EBUSY; 1841 goto out_put_floppy; 1842 } 1843 return 0; 1844 1845out_put_floppy: 1846 floppy->openers--; 1847 ide_floppy_put(floppy); 1848 return ret; 1849} 1850 1851static int idefloppy_release(struct inode *inode, struct file *filp) 1852{ 1853 struct gendisk *disk = inode->i_bdev->bd_disk; 1854 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1855 ide_drive_t *drive = floppy->drive; 1856 idefloppy_pc_t pc; 1857 1858 debug_log(KERN_INFO "Reached idefloppy_release\n"); 1859 1860 if (floppy->openers == 1) { 1861 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1862 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1863 idefloppy_create_prevent_cmd(&pc, 0); 1864 (void) idefloppy_queue_pc_tail(drive, &pc); 1865 } 1866 1867 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1868 } 1869 1870 floppy->openers--; 1871 1872 ide_floppy_put(floppy); 1873 1874 return 0; 1875} 1876 1877static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 1878{ 1879 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1880 ide_drive_t *drive = floppy->drive; 1881 1882 geo->heads = drive->bios_head; 1883 geo->sectors = drive->bios_sect; 1884 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 1885 return 0; 1886} 1887 1888static int idefloppy_ioctl(struct inode *inode, struct file *file, 1889 unsigned int cmd, unsigned long arg) 1890{ 1891 struct block_device *bdev = inode->i_bdev; 1892 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 1893 ide_drive_t *drive = floppy->drive; 1894 void __user *argp = (void __user *)arg; 1895 int err; 1896 int prevent = (arg) ? 1 : 0; 1897 idefloppy_pc_t pc; 1898 1899 switch (cmd) { 1900 case CDROMEJECT: 1901 prevent = 0; 1902 /* fall through */ 1903 case CDROM_LOCKDOOR: 1904 if (floppy->openers > 1) 1905 return -EBUSY; 1906 1907 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 1908 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1909 idefloppy_create_prevent_cmd(&pc, prevent); 1910 (void) idefloppy_queue_pc_tail(drive, &pc); 1911 } 1912 if (cmd == CDROMEJECT) { 1913 idefloppy_create_start_stop_cmd(&pc, 2); 1914 (void) idefloppy_queue_pc_tail(drive, &pc); 1915 } 1916 return 0; 1917 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 1918 return 0; 1919 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 1920 return idefloppy_get_format_capacities(drive, argp); 1921 case IDEFLOPPY_IOCTL_FORMAT_START: 1922 1923 if (!(file->f_mode & 2)) 1924 return -EPERM; 1925 1926 if (floppy->openers > 1) { 1927 /* Don't format if someone is using the disk */ 1928 1929 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 1930 &floppy->flags); 1931 return -EBUSY; 1932 } 1933 1934 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1935 1936 err = idefloppy_begin_format(drive, argp); 1937 if (err) 1938 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1939 return err; 1940 /* 1941 ** Note, the bit will be cleared when the device is 1942 ** closed. This is the cleanest way to handle the 1943 ** situation where the drive does not support 1944 ** format progress reporting. 1945 */ 1946 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 1947 return idefloppy_get_format_progress(drive, argp); 1948 } 1949 1950 /* 1951 * skip SCSI_IOCTL_SEND_COMMAND (deprecated) 1952 * and CDROM_SEND_PACKET (legacy) ioctls 1953 */ 1954 if (cmd != CDROM_SEND_PACKET && cmd != SCSI_IOCTL_SEND_COMMAND) 1955 err = scsi_cmd_ioctl(file, bdev->bd_disk->queue, 1956 bdev->bd_disk, cmd, argp); 1957 else 1958 err = -ENOTTY; 1959 1960 if (err == -ENOTTY) 1961 err = generic_ide_ioctl(drive, file, bdev, cmd, arg); 1962 1963 return err; 1964} 1965 1966static int idefloppy_media_changed(struct gendisk *disk) 1967{ 1968 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1969 ide_drive_t *drive = floppy->drive; 1970 1971 /* do not scan partitions twice if this is a removable device */ 1972 if (drive->attach) { 1973 drive->attach = 0; 1974 return 0; 1975 } 1976 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1977} 1978 1979static int idefloppy_revalidate_disk(struct gendisk *disk) 1980{ 1981 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 1982 set_capacity(disk, idefloppy_capacity(floppy->drive)); 1983 return 0; 1984} 1985 1986static struct block_device_operations idefloppy_ops = { 1987 .owner = THIS_MODULE, 1988 .open = idefloppy_open, 1989 .release = idefloppy_release, 1990 .ioctl = idefloppy_ioctl, 1991 .getgeo = idefloppy_getgeo, 1992 .media_changed = idefloppy_media_changed, 1993 .revalidate_disk= idefloppy_revalidate_disk 1994}; 1995 1996static int ide_floppy_probe(ide_drive_t *drive) 1997{ 1998 idefloppy_floppy_t *floppy; 1999 struct gendisk *g; 2000 2001 if (!strstr("ide-floppy", drive->driver_req)) 2002 goto failed; 2003 if (!drive->present) 2004 goto failed; 2005 if (drive->media != ide_floppy) 2006 goto failed; 2007 if (!idefloppy_identify_device (drive, drive->id)) { 2008 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 2009 goto failed; 2010 } 2011 if (drive->scsi) { 2012 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 2013 goto failed; 2014 } 2015 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 2016 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 2017 goto failed; 2018 } 2019 2020 g = alloc_disk(1 << PARTN_BITS); 2021 if (!g) 2022 goto out_free_floppy; 2023 2024 ide_init_disk(g, drive); 2025 2026 ide_proc_register_driver(drive, &idefloppy_driver); 2027 2028 kref_init(&floppy->kref); 2029 2030 floppy->drive = drive; 2031 floppy->driver = &idefloppy_driver; 2032 floppy->disk = g; 2033 2034 g->private_data = &floppy->driver; 2035 2036 drive->driver_data = floppy; 2037 2038 idefloppy_setup (drive, floppy); 2039 2040 g->minors = 1 << PARTN_BITS; 2041 g->driverfs_dev = &drive->gendev; 2042 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 2043 g->fops = &idefloppy_ops; 2044 drive->attach = 1; 2045 add_disk(g); 2046 return 0; 2047 2048out_free_floppy: 2049 kfree(floppy); 2050failed: 2051 return -ENODEV; 2052} 2053 2054MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 2055 2056static void __exit idefloppy_exit (void) 2057{ 2058 driver_unregister(&idefloppy_driver.gen_driver); 2059} 2060 2061static int __init idefloppy_init(void) 2062{ 2063 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 2064 return driver_register(&idefloppy_driver.gen_driver); 2065} 2066 2067MODULE_ALIAS("ide:*m-floppy*"); 2068module_init(idefloppy_init); 2069module_exit(idefloppy_exit); 2070MODULE_LICENSE("GPL"); 2071