ide-floppy.c revision 3d6392cfbd7dc11f23058e3493683afab4ac13a3
1/* 2 * linux/drivers/ide/ide-floppy.c Version 0.99 Feb 24 2002 3 * 4 * Copyright (C) 1996 - 1999 Gadi Oxman <gadio@netvision.net.il> 5 * Copyright (C) 2000 - 2002 Paul Bristow <paul@paulbristow.net> 6 */ 7 8/* 9 * IDE ATAPI floppy driver. 10 * 11 * The driver currently doesn't have any fancy features, just the bare 12 * minimum read/write support. 13 * 14 * This driver supports the following IDE floppy drives: 15 * 16 * LS-120/240 SuperDisk 17 * Iomega Zip 100/250 18 * Iomega PC Card Clik!/PocketZip 19 * 20 * Many thanks to Lode Leroy <Lode.Leroy@www.ibase.be>, who tested so many 21 * ALPHA patches to this driver on an EASYSTOR LS-120 ATAPI floppy drive. 22 * 23 * Ver 0.1 Oct 17 96 Initial test version, mostly based on ide-tape.c. 24 * Ver 0.2 Oct 31 96 Minor changes. 25 * Ver 0.3 Dec 2 96 Fixed error recovery bug. 26 * Ver 0.4 Jan 26 97 Add support for the HDIO_GETGEO ioctl. 27 * Ver 0.5 Feb 21 97 Add partitions support. 28 * Use the minimum of the LBA and CHS capacities. 29 * Avoid hwgroup->rq == NULL on the last irq. 30 * Fix potential null dereferencing with DEBUG_LOG. 31 * Ver 0.8 Dec 7 97 Increase irq timeout from 10 to 50 seconds. 32 * Add media write-protect detection. 33 * Issue START command only if TEST UNIT READY fails. 34 * Add work-around for IOMEGA ZIP revision 21.D. 35 * Remove idefloppy_get_capabilities(). 36 * Ver 0.9 Jul 4 99 Fix a bug which might have caused the number of 37 * bytes requested on each interrupt to be zero. 38 * Thanks to <shanos@es.co.nz> for pointing this out. 39 * Ver 0.9.sv Jan 6 01 Sam Varshavchik <mrsam@courier-mta.com> 40 * Implement low level formatting. Reimplemented 41 * IDEFLOPPY_CAPABILITIES_PAGE, since we need the srfp 42 * bit. My LS-120 drive barfs on 43 * IDEFLOPPY_CAPABILITIES_PAGE, but maybe it's just me. 44 * Compromise by not reporting a failure to get this 45 * mode page. Implemented four IOCTLs in order to 46 * implement formatting. IOCTls begin with 0x4600, 47 * 0x46 is 'F' as in Format. 48 * Jan 9 01 Userland option to select format verify. 49 * Added PC_SUPPRESS_ERROR flag - some idefloppy drives 50 * do not implement IDEFLOPPY_CAPABILITIES_PAGE, and 51 * return a sense error. Suppress error reporting in 52 * this particular case in order to avoid spurious 53 * errors in syslog. The culprit is 54 * idefloppy_get_capability_page(), so move it to 55 * idefloppy_begin_format() so that it's not used 56 * unless absolutely necessary. 57 * If drive does not support format progress indication 58 * monitor the dsc bit in the status register. 59 * Also, O_NDELAY on open will allow the device to be 60 * opened without a disk available. This can be used to 61 * open an unformatted disk, or get the device capacity. 62 * Ver 0.91 Dec 11 99 Added IOMEGA Clik! drive support by 63 * <paul@paulbristow.net> 64 * Ver 0.92 Oct 22 00 Paul Bristow became official maintainer for this 65 * driver. Included Powerbook internal zip kludge. 66 * Ver 0.93 Oct 24 00 Fixed bugs for Clik! drive 67 * no disk on insert and disk change now works 68 * Ver 0.94 Oct 27 00 Tidied up to remove strstr(Clik) everywhere 69 * Ver 0.95 Nov 7 00 Brought across to kernel 2.4 70 * Ver 0.96 Jan 7 01 Actually in line with release version of 2.4.0 71 * including set_bit patch from Rusty Russell 72 * Ver 0.97 Jul 22 01 Merge 0.91-0.96 onto 0.9.sv for ac series 73 * Ver 0.97.sv Aug 3 01 Backported from 2.4.7-ac3 74 * Ver 0.98 Oct 26 01 Split idefloppy_transfer_pc into two pieces to 75 * fix a lost interrupt problem. It appears the busy 76 * bit was being deasserted by my IOMEGA ATAPI ZIP 100 77 * drive before the drive was actually ready. 78 * Ver 0.98a Oct 29 01 Expose delay value so we can play. 79 * Ver 0.99 Feb 24 02 Remove duplicate code, modify clik! detection code 80 * to support new PocketZip drives 81 */ 82 83#define IDEFLOPPY_VERSION "0.99.newide" 84 85#include <linux/module.h> 86#include <linux/types.h> 87#include <linux/string.h> 88#include <linux/kernel.h> 89#include <linux/delay.h> 90#include <linux/timer.h> 91#include <linux/mm.h> 92#include <linux/interrupt.h> 93#include <linux/major.h> 94#include <linux/errno.h> 95#include <linux/genhd.h> 96#include <linux/slab.h> 97#include <linux/cdrom.h> 98#include <linux/ide.h> 99#include <linux/bitops.h> 100#include <linux/mutex.h> 101 102#include <asm/byteorder.h> 103#include <asm/irq.h> 104#include <asm/uaccess.h> 105#include <asm/io.h> 106#include <asm/unaligned.h> 107 108/* 109 * The following are used to debug the driver. 110 */ 111#define IDEFLOPPY_DEBUG_LOG 0 112#define IDEFLOPPY_DEBUG_INFO 0 113#define IDEFLOPPY_DEBUG_BUGS 1 114 115/* #define IDEFLOPPY_DEBUG(fmt, args...) printk(KERN_INFO fmt, ## args) */ 116#define IDEFLOPPY_DEBUG( fmt, args... ) 117 118#if IDEFLOPPY_DEBUG_LOG 119#define debug_log printk 120#else 121#define debug_log(fmt, args... ) do {} while(0) 122#endif 123 124 125/* 126 * Some drives require a longer irq timeout. 127 */ 128#define IDEFLOPPY_WAIT_CMD (5 * WAIT_CMD) 129 130/* 131 * After each failed packet command we issue a request sense command 132 * and retry the packet command IDEFLOPPY_MAX_PC_RETRIES times. 133 */ 134#define IDEFLOPPY_MAX_PC_RETRIES 3 135 136/* 137 * With each packet command, we allocate a buffer of 138 * IDEFLOPPY_PC_BUFFER_SIZE bytes. 139 */ 140#define IDEFLOPPY_PC_BUFFER_SIZE 256 141 142/* 143 * In various places in the driver, we need to allocate storage 144 * for packet commands and requests, which will remain valid while 145 * we leave the driver to wait for an interrupt or a timeout event. 146 */ 147#define IDEFLOPPY_PC_STACK (10 + IDEFLOPPY_MAX_PC_RETRIES) 148 149/* 150 * Our view of a packet command. 151 */ 152typedef struct idefloppy_packet_command_s { 153 u8 c[12]; /* Actual packet bytes */ 154 int retries; /* On each retry, we increment retries */ 155 int error; /* Error code */ 156 int request_transfer; /* Bytes to transfer */ 157 int actually_transferred; /* Bytes actually transferred */ 158 int buffer_size; /* Size of our data buffer */ 159 int b_count; /* Missing/Available data on the current buffer */ 160 struct request *rq; /* The corresponding request */ 161 u8 *buffer; /* Data buffer */ 162 u8 *current_position; /* Pointer into the above buffer */ 163 void (*callback) (ide_drive_t *); /* Called when this packet command is completed */ 164 u8 pc_buffer[IDEFLOPPY_PC_BUFFER_SIZE]; /* Temporary buffer */ 165 unsigned long flags; /* Status/Action bit flags: long for set_bit */ 166} idefloppy_pc_t; 167 168/* 169 * Packet command flag bits. 170 */ 171#define PC_ABORT 0 /* Set when an error is considered normal - We won't retry */ 172#define PC_DMA_RECOMMENDED 2 /* 1 when we prefer to use DMA if possible */ 173#define PC_DMA_IN_PROGRESS 3 /* 1 while DMA in progress */ 174#define PC_DMA_ERROR 4 /* 1 when encountered problem during DMA */ 175#define PC_WRITING 5 /* Data direction */ 176 177#define PC_SUPPRESS_ERROR 6 /* Suppress error reporting */ 178 179/* 180 * Removable Block Access Capabilities Page 181 */ 182typedef struct { 183#if defined(__LITTLE_ENDIAN_BITFIELD) 184 unsigned page_code :6; /* Page code - Should be 0x1b */ 185 unsigned reserved1_6 :1; /* Reserved */ 186 unsigned ps :1; /* Should be 0 */ 187#elif defined(__BIG_ENDIAN_BITFIELD) 188 unsigned ps :1; /* Should be 0 */ 189 unsigned reserved1_6 :1; /* Reserved */ 190 unsigned page_code :6; /* Page code - Should be 0x1b */ 191#else 192#error "Bitfield endianness not defined! Check your byteorder.h" 193#endif 194 u8 page_length; /* Page Length - Should be 0xa */ 195#if defined(__LITTLE_ENDIAN_BITFIELD) 196 unsigned reserved2 :6; 197 unsigned srfp :1; /* Supports reporting progress of format */ 198 unsigned sflp :1; /* System floppy type device */ 199 unsigned tlun :3; /* Total logical units supported by the device */ 200 unsigned reserved3 :3; 201 unsigned sml :1; /* Single / Multiple lun supported */ 202 unsigned ncd :1; /* Non cd optical device */ 203#elif defined(__BIG_ENDIAN_BITFIELD) 204 unsigned sflp :1; /* System floppy type device */ 205 unsigned srfp :1; /* Supports reporting progress of format */ 206 unsigned reserved2 :6; 207 unsigned ncd :1; /* Non cd optical device */ 208 unsigned sml :1; /* Single / Multiple lun supported */ 209 unsigned reserved3 :3; 210 unsigned tlun :3; /* Total logical units supported by the device */ 211#else 212#error "Bitfield endianness not defined! Check your byteorder.h" 213#endif 214 u8 reserved[8]; 215} idefloppy_capabilities_page_t; 216 217/* 218 * Flexible disk page. 219 */ 220typedef struct { 221#if defined(__LITTLE_ENDIAN_BITFIELD) 222 unsigned page_code :6; /* Page code - Should be 0x5 */ 223 unsigned reserved1_6 :1; /* Reserved */ 224 unsigned ps :1; /* The device is capable of saving the page */ 225#elif defined(__BIG_ENDIAN_BITFIELD) 226 unsigned ps :1; /* The device is capable of saving the page */ 227 unsigned reserved1_6 :1; /* Reserved */ 228 unsigned page_code :6; /* Page code - Should be 0x5 */ 229#else 230#error "Bitfield endianness not defined! Check your byteorder.h" 231#endif 232 u8 page_length; /* Page Length - Should be 0x1e */ 233 u16 transfer_rate; /* In kilobits per second */ 234 u8 heads, sectors; /* Number of heads, Number of sectors per track */ 235 u16 sector_size; /* Byes per sector */ 236 u16 cyls; /* Number of cylinders */ 237 u8 reserved10[10]; 238 u8 motor_delay; /* Motor off delay */ 239 u8 reserved21[7]; 240 u16 rpm; /* Rotations per minute */ 241 u8 reserved30[2]; 242} idefloppy_flexible_disk_page_t; 243 244/* 245 * Format capacity 246 */ 247typedef struct { 248 u8 reserved[3]; 249 u8 length; /* Length of the following descriptors in bytes */ 250} idefloppy_capacity_header_t; 251 252typedef struct { 253 u32 blocks; /* Number of blocks */ 254#if defined(__LITTLE_ENDIAN_BITFIELD) 255 unsigned dc :2; /* Descriptor Code */ 256 unsigned reserved :6; 257#elif defined(__BIG_ENDIAN_BITFIELD) 258 unsigned reserved :6; 259 unsigned dc :2; /* Descriptor Code */ 260#else 261#error "Bitfield endianness not defined! Check your byteorder.h" 262#endif 263 u8 length_msb; /* Block Length (MSB)*/ 264 u16 length; /* Block Length */ 265} idefloppy_capacity_descriptor_t; 266 267#define CAPACITY_INVALID 0x00 268#define CAPACITY_UNFORMATTED 0x01 269#define CAPACITY_CURRENT 0x02 270#define CAPACITY_NO_CARTRIDGE 0x03 271 272/* 273 * Most of our global data which we need to save even as we leave the 274 * driver due to an interrupt or a timer event is stored in a variable 275 * of type idefloppy_floppy_t, defined below. 276 */ 277typedef struct ide_floppy_obj { 278 ide_drive_t *drive; 279 ide_driver_t *driver; 280 struct gendisk *disk; 281 struct kref kref; 282 unsigned int openers; /* protected by BKL for now */ 283 284 /* Current packet command */ 285 idefloppy_pc_t *pc; 286 /* Last failed packet command */ 287 idefloppy_pc_t *failed_pc; 288 /* Packet command stack */ 289 idefloppy_pc_t pc_stack[IDEFLOPPY_PC_STACK]; 290 /* Next free packet command storage space */ 291 int pc_stack_index; 292 struct request rq_stack[IDEFLOPPY_PC_STACK]; 293 /* We implement a circular array */ 294 int rq_stack_index; 295 296 /* 297 * Last error information 298 */ 299 u8 sense_key, asc, ascq; 300 /* delay this long before sending packet command */ 301 u8 ticks; 302 int progress_indication; 303 304 /* 305 * Device information 306 */ 307 /* Current format */ 308 int blocks, block_size, bs_factor; 309 /* Last format capacity */ 310 idefloppy_capacity_descriptor_t capacity; 311 /* Copy of the flexible disk page */ 312 idefloppy_flexible_disk_page_t flexible_disk_page; 313 /* Write protect */ 314 int wp; 315 /* Supports format progress report */ 316 int srfp; 317 /* Status/Action flags */ 318 unsigned long flags; 319} idefloppy_floppy_t; 320 321#define IDEFLOPPY_TICKS_DELAY HZ/20 /* default delay for ZIP 100 (50ms) */ 322 323/* 324 * Floppy flag bits values. 325 */ 326#define IDEFLOPPY_DRQ_INTERRUPT 0 /* DRQ interrupt device */ 327#define IDEFLOPPY_MEDIA_CHANGED 1 /* Media may have changed */ 328#define IDEFLOPPY_USE_READ12 2 /* Use READ12/WRITE12 or READ10/WRITE10 */ 329#define IDEFLOPPY_FORMAT_IN_PROGRESS 3 /* Format in progress */ 330#define IDEFLOPPY_CLIK_DRIVE 4 /* Avoid commands not supported in Clik drive */ 331#define IDEFLOPPY_ZIP_DRIVE 5 /* Requires BH algorithm for packets */ 332 333/* 334 * ATAPI floppy drive packet commands 335 */ 336#define IDEFLOPPY_FORMAT_UNIT_CMD 0x04 337#define IDEFLOPPY_INQUIRY_CMD 0x12 338#define IDEFLOPPY_MODE_SELECT_CMD 0x55 339#define IDEFLOPPY_MODE_SENSE_CMD 0x5a 340#define IDEFLOPPY_READ10_CMD 0x28 341#define IDEFLOPPY_READ12_CMD 0xa8 342#define IDEFLOPPY_READ_CAPACITY_CMD 0x23 343#define IDEFLOPPY_REQUEST_SENSE_CMD 0x03 344#define IDEFLOPPY_PREVENT_REMOVAL_CMD 0x1e 345#define IDEFLOPPY_SEEK_CMD 0x2b 346#define IDEFLOPPY_START_STOP_CMD 0x1b 347#define IDEFLOPPY_TEST_UNIT_READY_CMD 0x00 348#define IDEFLOPPY_VERIFY_CMD 0x2f 349#define IDEFLOPPY_WRITE10_CMD 0x2a 350#define IDEFLOPPY_WRITE12_CMD 0xaa 351#define IDEFLOPPY_WRITE_VERIFY_CMD 0x2e 352 353/* 354 * Defines for the mode sense command 355 */ 356#define MODE_SENSE_CURRENT 0x00 357#define MODE_SENSE_CHANGEABLE 0x01 358#define MODE_SENSE_DEFAULT 0x02 359#define MODE_SENSE_SAVED 0x03 360 361/* 362 * IOCTLs used in low-level formatting. 363 */ 364 365#define IDEFLOPPY_IOCTL_FORMAT_SUPPORTED 0x4600 366#define IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY 0x4601 367#define IDEFLOPPY_IOCTL_FORMAT_START 0x4602 368#define IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS 0x4603 369 370#if 0 371/* 372 * Special requests for our block device strategy routine. 373 */ 374#define IDEFLOPPY_FIRST_RQ 90 375 376/* 377 * IDEFLOPPY_PC_RQ is used to queue a packet command in the request queue. 378 */ 379#define IDEFLOPPY_PC_RQ 90 380 381#define IDEFLOPPY_LAST_RQ 90 382 383/* 384 * A macro which can be used to check if a given request command 385 * originated in the driver or in the buffer cache layer. 386 */ 387#define IDEFLOPPY_RQ_CMD(cmd) ((cmd >= IDEFLOPPY_FIRST_RQ) && (cmd <= IDEFLOPPY_LAST_RQ)) 388 389#endif 390 391/* 392 * Error codes which are returned in rq->errors to the higher part 393 * of the driver. 394 */ 395#define IDEFLOPPY_ERROR_GENERAL 101 396 397/* 398 * The following is used to format the general configuration word of 399 * the ATAPI IDENTIFY DEVICE command. 400 */ 401struct idefloppy_id_gcw { 402#if defined(__LITTLE_ENDIAN_BITFIELD) 403 unsigned packet_size :2; /* Packet Size */ 404 unsigned reserved234 :3; /* Reserved */ 405 unsigned drq_type :2; /* Command packet DRQ type */ 406 unsigned removable :1; /* Removable media */ 407 unsigned device_type :5; /* Device type */ 408 unsigned reserved13 :1; /* Reserved */ 409 unsigned protocol :2; /* Protocol type */ 410#elif defined(__BIG_ENDIAN_BITFIELD) 411 unsigned protocol :2; /* Protocol type */ 412 unsigned reserved13 :1; /* Reserved */ 413 unsigned device_type :5; /* Device type */ 414 unsigned removable :1; /* Removable media */ 415 unsigned drq_type :2; /* Command packet DRQ type */ 416 unsigned reserved234 :3; /* Reserved */ 417 unsigned packet_size :2; /* Packet Size */ 418#else 419#error "Bitfield endianness not defined! Check your byteorder.h" 420#endif 421}; 422 423/* 424 * INQUIRY packet command - Data Format 425 */ 426typedef struct { 427#if defined(__LITTLE_ENDIAN_BITFIELD) 428 unsigned device_type :5; /* Peripheral Device Type */ 429 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 430 unsigned reserved1_6t0 :7; /* Reserved */ 431 unsigned rmb :1; /* Removable Medium Bit */ 432 unsigned ansi_version :3; /* ANSI Version */ 433 unsigned ecma_version :3; /* ECMA Version */ 434 unsigned iso_version :2; /* ISO Version */ 435 unsigned response_format :4; /* Response Data Format */ 436 unsigned reserved3_45 :2; /* Reserved */ 437 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 438 unsigned reserved3_7 :1; /* AENC - Reserved */ 439#elif defined(__BIG_ENDIAN_BITFIELD) 440 unsigned reserved0_765 :3; /* Peripheral Qualifier - Reserved */ 441 unsigned device_type :5; /* Peripheral Device Type */ 442 unsigned rmb :1; /* Removable Medium Bit */ 443 unsigned reserved1_6t0 :7; /* Reserved */ 444 unsigned iso_version :2; /* ISO Version */ 445 unsigned ecma_version :3; /* ECMA Version */ 446 unsigned ansi_version :3; /* ANSI Version */ 447 unsigned reserved3_7 :1; /* AENC - Reserved */ 448 unsigned reserved3_6 :1; /* TrmIOP - Reserved */ 449 unsigned reserved3_45 :2; /* Reserved */ 450 unsigned response_format :4; /* Response Data Format */ 451#else 452#error "Bitfield endianness not defined! Check your byteorder.h" 453#endif 454 u8 additional_length; /* Additional Length (total_length-4) */ 455 u8 rsv5, rsv6, rsv7; /* Reserved */ 456 u8 vendor_id[8]; /* Vendor Identification */ 457 u8 product_id[16]; /* Product Identification */ 458 u8 revision_level[4]; /* Revision Level */ 459 u8 vendor_specific[20]; /* Vendor Specific - Optional */ 460 u8 reserved56t95[40]; /* Reserved - Optional */ 461 /* Additional information may be returned */ 462} idefloppy_inquiry_result_t; 463 464/* 465 * REQUEST SENSE packet command result - Data Format. 466 */ 467typedef struct { 468#if defined(__LITTLE_ENDIAN_BITFIELD) 469 unsigned error_code :7; /* Current error (0x70) */ 470 unsigned valid :1; /* The information field conforms to SFF-8070i */ 471 u8 reserved1 :8; /* Reserved */ 472 unsigned sense_key :4; /* Sense Key */ 473 unsigned reserved2_4 :1; /* Reserved */ 474 unsigned ili :1; /* Incorrect Length Indicator */ 475 unsigned reserved2_67 :2; 476#elif defined(__BIG_ENDIAN_BITFIELD) 477 unsigned valid :1; /* The information field conforms to SFF-8070i */ 478 unsigned error_code :7; /* Current error (0x70) */ 479 u8 reserved1 :8; /* Reserved */ 480 unsigned reserved2_67 :2; 481 unsigned ili :1; /* Incorrect Length Indicator */ 482 unsigned reserved2_4 :1; /* Reserved */ 483 unsigned sense_key :4; /* Sense Key */ 484#else 485#error "Bitfield endianness not defined! Check your byteorder.h" 486#endif 487 u32 information __attribute__ ((packed)); 488 u8 asl; /* Additional sense length (n-7) */ 489 u32 command_specific; /* Additional command specific information */ 490 u8 asc; /* Additional Sense Code */ 491 u8 ascq; /* Additional Sense Code Qualifier */ 492 u8 replaceable_unit_code; /* Field Replaceable Unit Code */ 493 u8 sksv[3]; 494 u8 pad[2]; /* Padding to 20 bytes */ 495} idefloppy_request_sense_result_t; 496 497/* 498 * Pages of the SELECT SENSE / MODE SENSE packet commands. 499 */ 500#define IDEFLOPPY_CAPABILITIES_PAGE 0x1b 501#define IDEFLOPPY_FLEXIBLE_DISK_PAGE 0x05 502 503/* 504 * Mode Parameter Header for the MODE SENSE packet command 505 */ 506typedef struct { 507 u16 mode_data_length; /* Length of the following data transfer */ 508 u8 medium_type; /* Medium Type */ 509#if defined(__LITTLE_ENDIAN_BITFIELD) 510 unsigned reserved3 :7; 511 unsigned wp :1; /* Write protect */ 512#elif defined(__BIG_ENDIAN_BITFIELD) 513 unsigned wp :1; /* Write protect */ 514 unsigned reserved3 :7; 515#else 516#error "Bitfield endianness not defined! Check your byteorder.h" 517#endif 518 u8 reserved[4]; 519} idefloppy_mode_parameter_header_t; 520 521static DEFINE_MUTEX(idefloppy_ref_mutex); 522 523#define to_ide_floppy(obj) container_of(obj, struct ide_floppy_obj, kref) 524 525#define ide_floppy_g(disk) \ 526 container_of((disk)->private_data, struct ide_floppy_obj, driver) 527 528static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk) 529{ 530 struct ide_floppy_obj *floppy = NULL; 531 532 mutex_lock(&idefloppy_ref_mutex); 533 floppy = ide_floppy_g(disk); 534 if (floppy) 535 kref_get(&floppy->kref); 536 mutex_unlock(&idefloppy_ref_mutex); 537 return floppy; 538} 539 540static void ide_floppy_release(struct kref *); 541 542static void ide_floppy_put(struct ide_floppy_obj *floppy) 543{ 544 mutex_lock(&idefloppy_ref_mutex); 545 kref_put(&floppy->kref, ide_floppy_release); 546 mutex_unlock(&idefloppy_ref_mutex); 547} 548 549/* 550 * Too bad. The drive wants to send us data which we are not ready to accept. 551 * Just throw it away. 552 */ 553static void idefloppy_discard_data (ide_drive_t *drive, unsigned int bcount) 554{ 555 while (bcount--) 556 (void) HWIF(drive)->INB(IDE_DATA_REG); 557} 558 559#if IDEFLOPPY_DEBUG_BUGS 560static void idefloppy_write_zeros (ide_drive_t *drive, unsigned int bcount) 561{ 562 while (bcount--) 563 HWIF(drive)->OUTB(0, IDE_DATA_REG); 564} 565#endif /* IDEFLOPPY_DEBUG_BUGS */ 566 567 568/* 569 * idefloppy_do_end_request is used to finish servicing a request. 570 * 571 * For read/write requests, we will call ide_end_request to pass to the 572 * next buffer. 573 */ 574static int idefloppy_do_end_request(ide_drive_t *drive, int uptodate, int nsecs) 575{ 576 idefloppy_floppy_t *floppy = drive->driver_data; 577 struct request *rq = HWGROUP(drive)->rq; 578 int error; 579 580 debug_log(KERN_INFO "Reached idefloppy_end_request\n"); 581 582 switch (uptodate) { 583 case 0: error = IDEFLOPPY_ERROR_GENERAL; break; 584 case 1: error = 0; break; 585 default: error = uptodate; 586 } 587 if (error) 588 floppy->failed_pc = NULL; 589 /* Why does this happen? */ 590 if (!rq) 591 return 0; 592 if (!blk_special_request(rq)) { 593 /* our real local end request function */ 594 ide_end_request(drive, uptodate, nsecs); 595 return 0; 596 } 597 rq->errors = error; 598 /* fixme: need to move this local also */ 599 ide_end_drive_cmd(drive, 0, 0); 600 return 0; 601} 602 603static void idefloppy_input_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 604{ 605 struct request *rq = pc->rq; 606 struct bio_vec *bvec; 607 struct bio *bio; 608 unsigned long flags; 609 char *data; 610 int count, i, done = 0; 611 612 rq_for_each_bio(bio, rq) { 613 bio_for_each_segment(bvec, bio, i) { 614 if (!bcount) 615 break; 616 617 count = min(bvec->bv_len, bcount); 618 619 data = bvec_kmap_irq(bvec, &flags); 620 drive->hwif->atapi_input_bytes(drive, data, count); 621 bvec_kunmap_irq(data, &flags); 622 623 bcount -= count; 624 pc->b_count += count; 625 done += count; 626 } 627 } 628 629 idefloppy_do_end_request(drive, 1, done >> 9); 630 631 if (bcount) { 632 printk(KERN_ERR "%s: leftover data in idefloppy_input_buffers, bcount == %d\n", drive->name, bcount); 633 idefloppy_discard_data(drive, bcount); 634 } 635} 636 637static void idefloppy_output_buffers (ide_drive_t *drive, idefloppy_pc_t *pc, unsigned int bcount) 638{ 639 struct request *rq = pc->rq; 640 struct bio *bio; 641 struct bio_vec *bvec; 642 unsigned long flags; 643 int count, i, done = 0; 644 char *data; 645 646 rq_for_each_bio(bio, rq) { 647 bio_for_each_segment(bvec, bio, i) { 648 if (!bcount) 649 break; 650 651 count = min(bvec->bv_len, bcount); 652 653 data = bvec_kmap_irq(bvec, &flags); 654 drive->hwif->atapi_output_bytes(drive, data, count); 655 bvec_kunmap_irq(data, &flags); 656 657 bcount -= count; 658 pc->b_count += count; 659 done += count; 660 } 661 } 662 663 idefloppy_do_end_request(drive, 1, done >> 9); 664 665#if IDEFLOPPY_DEBUG_BUGS 666 if (bcount) { 667 printk(KERN_ERR "%s: leftover data in idefloppy_output_buffers, bcount == %d\n", drive->name, bcount); 668 idefloppy_write_zeros(drive, bcount); 669 } 670#endif 671} 672 673static void idefloppy_update_buffers (ide_drive_t *drive, idefloppy_pc_t *pc) 674{ 675 struct request *rq = pc->rq; 676 struct bio *bio = rq->bio; 677 678 while ((bio = rq->bio) != NULL) 679 idefloppy_do_end_request(drive, 1, 0); 680} 681 682/* 683 * idefloppy_queue_pc_head generates a new packet command request in front 684 * of the request queue, before the current request, so that it will be 685 * processed immediately, on the next pass through the driver. 686 */ 687static void idefloppy_queue_pc_head (ide_drive_t *drive,idefloppy_pc_t *pc,struct request *rq) 688{ 689 struct ide_floppy_obj *floppy = drive->driver_data; 690 691 ide_init_drive_cmd(rq); 692 rq->buffer = (char *) pc; 693 rq->cmd_type = REQ_TYPE_SPECIAL; 694 rq->rq_disk = floppy->disk; 695 (void) ide_do_drive_cmd(drive, rq, ide_preempt); 696} 697 698static idefloppy_pc_t *idefloppy_next_pc_storage (ide_drive_t *drive) 699{ 700 idefloppy_floppy_t *floppy = drive->driver_data; 701 702 if (floppy->pc_stack_index == IDEFLOPPY_PC_STACK) 703 floppy->pc_stack_index=0; 704 return (&floppy->pc_stack[floppy->pc_stack_index++]); 705} 706 707static struct request *idefloppy_next_rq_storage (ide_drive_t *drive) 708{ 709 idefloppy_floppy_t *floppy = drive->driver_data; 710 711 if (floppy->rq_stack_index == IDEFLOPPY_PC_STACK) 712 floppy->rq_stack_index = 0; 713 return (&floppy->rq_stack[floppy->rq_stack_index++]); 714} 715 716/* 717 * idefloppy_analyze_error is called on each failed packet command retry 718 * to analyze the request sense. 719 */ 720static void idefloppy_analyze_error (ide_drive_t *drive,idefloppy_request_sense_result_t *result) 721{ 722 idefloppy_floppy_t *floppy = drive->driver_data; 723 724 floppy->sense_key = result->sense_key; 725 floppy->asc = result->asc; 726 floppy->ascq = result->ascq; 727 floppy->progress_indication = result->sksv[0] & 0x80 ? 728 (u16)get_unaligned((u16 *)(result->sksv+1)):0x10000; 729 if (floppy->failed_pc) 730 debug_log(KERN_INFO "ide-floppy: pc = %x, sense key = %x, " 731 "asc = %x, ascq = %x\n", floppy->failed_pc->c[0], 732 result->sense_key, result->asc, result->ascq); 733 else 734 debug_log(KERN_INFO "ide-floppy: sense key = %x, asc = %x, " 735 "ascq = %x\n", result->sense_key, 736 result->asc, result->ascq); 737} 738 739static void idefloppy_request_sense_callback (ide_drive_t *drive) 740{ 741 idefloppy_floppy_t *floppy = drive->driver_data; 742 743 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 744 745 if (!floppy->pc->error) { 746 idefloppy_analyze_error(drive,(idefloppy_request_sense_result_t *) floppy->pc->buffer); 747 idefloppy_do_end_request(drive, 1, 0); 748 } else { 749 printk(KERN_ERR "Error in REQUEST SENSE itself - Aborting request!\n"); 750 idefloppy_do_end_request(drive, 0, 0); 751 } 752} 753 754/* 755 * General packet command callback function. 756 */ 757static void idefloppy_pc_callback (ide_drive_t *drive) 758{ 759 idefloppy_floppy_t *floppy = drive->driver_data; 760 761 debug_log(KERN_INFO "ide-floppy: Reached %s\n", __FUNCTION__); 762 763 idefloppy_do_end_request(drive, floppy->pc->error ? 0 : 1, 0); 764} 765 766/* 767 * idefloppy_init_pc initializes a packet command. 768 */ 769static void idefloppy_init_pc (idefloppy_pc_t *pc) 770{ 771 memset(pc->c, 0, 12); 772 pc->retries = 0; 773 pc->flags = 0; 774 pc->request_transfer = 0; 775 pc->buffer = pc->pc_buffer; 776 pc->buffer_size = IDEFLOPPY_PC_BUFFER_SIZE; 777 pc->callback = &idefloppy_pc_callback; 778} 779 780static void idefloppy_create_request_sense_cmd (idefloppy_pc_t *pc) 781{ 782 idefloppy_init_pc(pc); 783 pc->c[0] = IDEFLOPPY_REQUEST_SENSE_CMD; 784 pc->c[4] = 255; 785 pc->request_transfer = 18; 786 pc->callback = &idefloppy_request_sense_callback; 787} 788 789/* 790 * idefloppy_retry_pc is called when an error was detected during the 791 * last packet command. We queue a request sense packet command in 792 * the head of the request list. 793 */ 794static void idefloppy_retry_pc (ide_drive_t *drive) 795{ 796 idefloppy_pc_t *pc; 797 struct request *rq; 798 atapi_error_t error; 799 800 error.all = HWIF(drive)->INB(IDE_ERROR_REG); 801 pc = idefloppy_next_pc_storage(drive); 802 rq = idefloppy_next_rq_storage(drive); 803 idefloppy_create_request_sense_cmd(pc); 804 idefloppy_queue_pc_head(drive, pc, rq); 805} 806 807/* 808 * idefloppy_pc_intr is the usual interrupt handler which will be called 809 * during a packet command. 810 */ 811static ide_startstop_t idefloppy_pc_intr (ide_drive_t *drive) 812{ 813 idefloppy_floppy_t *floppy = drive->driver_data; 814 atapi_status_t status; 815 atapi_bcount_t bcount; 816 atapi_ireason_t ireason; 817 idefloppy_pc_t *pc = floppy->pc; 818 struct request *rq = pc->rq; 819 unsigned int temp; 820 821 debug_log(KERN_INFO "ide-floppy: Reached %s interrupt handler\n", 822 __FUNCTION__); 823 824 if (test_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 825 if (HWIF(drive)->ide_dma_end(drive)) { 826 set_bit(PC_DMA_ERROR, &pc->flags); 827 } else { 828 pc->actually_transferred = pc->request_transfer; 829 idefloppy_update_buffers(drive, pc); 830 } 831 debug_log(KERN_INFO "ide-floppy: DMA finished\n"); 832 } 833 834 /* Clear the interrupt */ 835 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 836 837 if (!status.b.drq) { /* No more interrupts */ 838 debug_log(KERN_INFO "Packet command completed, %d bytes " 839 "transferred\n", pc->actually_transferred); 840 clear_bit(PC_DMA_IN_PROGRESS, &pc->flags); 841 842 local_irq_enable_in_hardirq(); 843 844 if (status.b.check || test_bit(PC_DMA_ERROR, &pc->flags)) { 845 /* Error detected */ 846 debug_log(KERN_INFO "ide-floppy: %s: I/O error\n", 847 drive->name); 848 rq->errors++; 849 if (pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 850 printk(KERN_ERR "ide-floppy: I/O error in " 851 "request sense command\n"); 852 return ide_do_reset(drive); 853 } 854 /* Retry operation */ 855 idefloppy_retry_pc(drive); 856 /* queued, but not started */ 857 return ide_stopped; 858 } 859 pc->error = 0; 860 if (floppy->failed_pc == pc) 861 floppy->failed_pc = NULL; 862 /* Command finished - Call the callback function */ 863 pc->callback(drive); 864 return ide_stopped; 865 } 866 867 if (test_and_clear_bit(PC_DMA_IN_PROGRESS, &pc->flags)) { 868 printk(KERN_ERR "ide-floppy: The floppy wants to issue " 869 "more interrupts in DMA mode\n"); 870 ide_dma_off(drive); 871 return ide_do_reset(drive); 872 } 873 874 /* Get the number of bytes to transfer */ 875 bcount.b.high = HWIF(drive)->INB(IDE_BCOUNTH_REG); 876 bcount.b.low = HWIF(drive)->INB(IDE_BCOUNTL_REG); 877 /* on this interrupt */ 878 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 879 880 if (ireason.b.cod) { 881 printk(KERN_ERR "ide-floppy: CoD != 0 in idefloppy_pc_intr\n"); 882 return ide_do_reset(drive); 883 } 884 if (ireason.b.io == test_bit(PC_WRITING, &pc->flags)) { 885 /* Hopefully, we will never get here */ 886 printk(KERN_ERR "ide-floppy: We wanted to %s, ", 887 ireason.b.io ? "Write":"Read"); 888 printk(KERN_ERR "but the floppy wants us to %s !\n", 889 ireason.b.io ? "Read":"Write"); 890 return ide_do_reset(drive); 891 } 892 if (!test_bit(PC_WRITING, &pc->flags)) { 893 /* Reading - Check that we have enough space */ 894 temp = pc->actually_transferred + bcount.all; 895 if (temp > pc->request_transfer) { 896 if (temp > pc->buffer_size) { 897 printk(KERN_ERR "ide-floppy: The floppy wants " 898 "to send us more data than expected " 899 "- discarding data\n"); 900 idefloppy_discard_data(drive,bcount.all); 901 BUG_ON(HWGROUP(drive)->handler != NULL); 902 ide_set_handler(drive, 903 &idefloppy_pc_intr, 904 IDEFLOPPY_WAIT_CMD, 905 NULL); 906 return ide_started; 907 } 908 debug_log(KERN_NOTICE "ide-floppy: The floppy wants to " 909 "send us more data than expected - " 910 "allowing transfer\n"); 911 } 912 } 913 if (test_bit(PC_WRITING, &pc->flags)) { 914 if (pc->buffer != NULL) 915 /* Write the current buffer */ 916 HWIF(drive)->atapi_output_bytes(drive, 917 pc->current_position, 918 bcount.all); 919 else 920 idefloppy_output_buffers(drive, pc, bcount.all); 921 } else { 922 if (pc->buffer != NULL) 923 /* Read the current buffer */ 924 HWIF(drive)->atapi_input_bytes(drive, 925 pc->current_position, 926 bcount.all); 927 else 928 idefloppy_input_buffers(drive, pc, bcount.all); 929 } 930 /* Update the current position */ 931 pc->actually_transferred += bcount.all; 932 pc->current_position += bcount.all; 933 934 BUG_ON(HWGROUP(drive)->handler != NULL); 935 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); /* And set the interrupt handler again */ 936 return ide_started; 937} 938 939/* 940 * This is the original routine that did the packet transfer. 941 * It fails at high speeds on the Iomega ZIP drive, so there's a slower version 942 * for that drive below. The algorithm is chosen based on drive type 943 */ 944static ide_startstop_t idefloppy_transfer_pc (ide_drive_t *drive) 945{ 946 ide_startstop_t startstop; 947 idefloppy_floppy_t *floppy = drive->driver_data; 948 atapi_ireason_t ireason; 949 950 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 951 printk(KERN_ERR "ide-floppy: Strange, packet command " 952 "initiated yet DRQ isn't asserted\n"); 953 return startstop; 954 } 955 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 956 if (!ireason.b.cod || ireason.b.io) { 957 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) while " 958 "issuing a packet command\n"); 959 return ide_do_reset(drive); 960 } 961 BUG_ON(HWGROUP(drive)->handler != NULL); 962 /* Set the interrupt routine */ 963 ide_set_handler(drive, &idefloppy_pc_intr, IDEFLOPPY_WAIT_CMD, NULL); 964 /* Send the actual packet */ 965 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 966 return ide_started; 967} 968 969 970/* 971 * What we have here is a classic case of a top half / bottom half 972 * interrupt service routine. In interrupt mode, the device sends 973 * an interrupt to signal it's ready to receive a packet. However, 974 * we need to delay about 2-3 ticks before issuing the packet or we 975 * gets in trouble. 976 * 977 * So, follow carefully. transfer_pc1 is called as an interrupt (or 978 * directly). In either case, when the device says it's ready for a 979 * packet, we schedule the packet transfer to occur about 2-3 ticks 980 * later in transfer_pc2. 981 */ 982static int idefloppy_transfer_pc2 (ide_drive_t *drive) 983{ 984 idefloppy_floppy_t *floppy = drive->driver_data; 985 986 /* Send the actual packet */ 987 HWIF(drive)->atapi_output_bytes(drive, floppy->pc->c, 12); 988 /* Timeout for the packet command */ 989 return IDEFLOPPY_WAIT_CMD; 990} 991 992static ide_startstop_t idefloppy_transfer_pc1 (ide_drive_t *drive) 993{ 994 idefloppy_floppy_t *floppy = drive->driver_data; 995 ide_startstop_t startstop; 996 atapi_ireason_t ireason; 997 998 if (ide_wait_stat(&startstop, drive, DRQ_STAT, BUSY_STAT, WAIT_READY)) { 999 printk(KERN_ERR "ide-floppy: Strange, packet command " 1000 "initiated yet DRQ isn't asserted\n"); 1001 return startstop; 1002 } 1003 ireason.all = HWIF(drive)->INB(IDE_IREASON_REG); 1004 if (!ireason.b.cod || ireason.b.io) { 1005 printk(KERN_ERR "ide-floppy: (IO,CoD) != (0,1) " 1006 "while issuing a packet command\n"); 1007 return ide_do_reset(drive); 1008 } 1009 /* 1010 * The following delay solves a problem with ATAPI Zip 100 drives 1011 * where the Busy flag was apparently being deasserted before the 1012 * unit was ready to receive data. This was happening on a 1013 * 1200 MHz Athlon system. 10/26/01 25msec is too short, 1014 * 40 and 50msec work well. idefloppy_pc_intr will not be actually 1015 * used until after the packet is moved in about 50 msec. 1016 */ 1017 BUG_ON(HWGROUP(drive)->handler != NULL); 1018 ide_set_handler(drive, 1019 &idefloppy_pc_intr, /* service routine for packet command */ 1020 floppy->ticks, /* wait this long before "failing" */ 1021 &idefloppy_transfer_pc2); /* fail == transfer_pc2 */ 1022 return ide_started; 1023} 1024 1025/** 1026 * idefloppy_should_report_error() 1027 * 1028 * Supresses error messages resulting from Medium not present 1029 */ 1030static inline int idefloppy_should_report_error(idefloppy_floppy_t *floppy) 1031{ 1032 if (floppy->sense_key == 0x02 && 1033 floppy->asc == 0x3a && 1034 floppy->ascq == 0x00) 1035 return 0; 1036 return 1; 1037} 1038 1039/* 1040 * Issue a packet command 1041 */ 1042static ide_startstop_t idefloppy_issue_pc (ide_drive_t *drive, idefloppy_pc_t *pc) 1043{ 1044 idefloppy_floppy_t *floppy = drive->driver_data; 1045 ide_hwif_t *hwif = drive->hwif; 1046 atapi_feature_t feature; 1047 atapi_bcount_t bcount; 1048 ide_handler_t *pkt_xfer_routine; 1049 1050#if 0 /* Accessing floppy->pc is not valid here, the previous pc may be gone 1051 and have lived on another thread's stack; that stack may have become 1052 unmapped meanwhile (CONFIG_DEBUG_PAGEALLOC). */ 1053#if IDEFLOPPY_DEBUG_BUGS 1054 if (floppy->pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD && 1055 pc->c[0] == IDEFLOPPY_REQUEST_SENSE_CMD) { 1056 printk(KERN_ERR "ide-floppy: possible ide-floppy.c bug - " 1057 "Two request sense in serial were issued\n"); 1058 } 1059#endif /* IDEFLOPPY_DEBUG_BUGS */ 1060#endif 1061 1062 if (floppy->failed_pc == NULL && 1063 pc->c[0] != IDEFLOPPY_REQUEST_SENSE_CMD) 1064 floppy->failed_pc = pc; 1065 /* Set the current packet command */ 1066 floppy->pc = pc; 1067 1068 if (pc->retries > IDEFLOPPY_MAX_PC_RETRIES || 1069 test_bit(PC_ABORT, &pc->flags)) { 1070 /* 1071 * We will "abort" retrying a packet command in case 1072 * a legitimate error code was received. 1073 */ 1074 if (!test_bit(PC_ABORT, &pc->flags)) { 1075 if (!test_bit(PC_SUPPRESS_ERROR, &pc->flags)) { 1076 if (idefloppy_should_report_error(floppy)) 1077 printk(KERN_ERR "ide-floppy: %s: I/O error, " 1078 "pc = %2x, key = %2x, " 1079 "asc = %2x, ascq = %2x\n", 1080 drive->name, pc->c[0], 1081 floppy->sense_key, 1082 floppy->asc, floppy->ascq); 1083 } 1084 /* Giving up */ 1085 pc->error = IDEFLOPPY_ERROR_GENERAL; 1086 } 1087 floppy->failed_pc = NULL; 1088 pc->callback(drive); 1089 return ide_stopped; 1090 } 1091 1092 debug_log(KERN_INFO "Retry number - %d\n",pc->retries); 1093 1094 pc->retries++; 1095 /* We haven't transferred any data yet */ 1096 pc->actually_transferred = 0; 1097 pc->current_position = pc->buffer; 1098 bcount.all = min(pc->request_transfer, 63 * 1024); 1099 1100 if (test_and_clear_bit(PC_DMA_ERROR, &pc->flags)) 1101 ide_dma_off(drive); 1102 1103 feature.all = 0; 1104 1105 if (test_bit(PC_DMA_RECOMMENDED, &pc->flags) && drive->using_dma) 1106 feature.b.dma = !hwif->dma_setup(drive); 1107 1108 if (IDE_CONTROL_REG) 1109 HWIF(drive)->OUTB(drive->ctl, IDE_CONTROL_REG); 1110 /* Use PIO/DMA */ 1111 HWIF(drive)->OUTB(feature.all, IDE_FEATURE_REG); 1112 HWIF(drive)->OUTB(bcount.b.high, IDE_BCOUNTH_REG); 1113 HWIF(drive)->OUTB(bcount.b.low, IDE_BCOUNTL_REG); 1114 HWIF(drive)->OUTB(drive->select.all, IDE_SELECT_REG); 1115 1116 if (feature.b.dma) { /* Begin DMA, if necessary */ 1117 set_bit(PC_DMA_IN_PROGRESS, &pc->flags); 1118 hwif->dma_start(drive); 1119 } 1120 1121 /* Can we transfer the packet when we get the interrupt or wait? */ 1122 if (test_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags)) { 1123 /* wait */ 1124 pkt_xfer_routine = &idefloppy_transfer_pc1; 1125 } else { 1126 /* immediate */ 1127 pkt_xfer_routine = &idefloppy_transfer_pc; 1128 } 1129 1130 if (test_bit (IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags)) { 1131 /* Issue the packet command */ 1132 ide_execute_command(drive, WIN_PACKETCMD, 1133 pkt_xfer_routine, 1134 IDEFLOPPY_WAIT_CMD, 1135 NULL); 1136 return ide_started; 1137 } else { 1138 /* Issue the packet command */ 1139 HWIF(drive)->OUTB(WIN_PACKETCMD, IDE_COMMAND_REG); 1140 return (*pkt_xfer_routine) (drive); 1141 } 1142} 1143 1144static void idefloppy_rw_callback (ide_drive_t *drive) 1145{ 1146 debug_log(KERN_INFO "ide-floppy: Reached idefloppy_rw_callback\n"); 1147 1148 idefloppy_do_end_request(drive, 1, 0); 1149 return; 1150} 1151 1152static void idefloppy_create_prevent_cmd (idefloppy_pc_t *pc, int prevent) 1153{ 1154 debug_log(KERN_INFO "ide-floppy: creating prevent removal command, " 1155 "prevent = %d\n", prevent); 1156 1157 idefloppy_init_pc(pc); 1158 pc->c[0] = IDEFLOPPY_PREVENT_REMOVAL_CMD; 1159 pc->c[4] = prevent; 1160} 1161 1162static void idefloppy_create_read_capacity_cmd (idefloppy_pc_t *pc) 1163{ 1164 idefloppy_init_pc(pc); 1165 pc->c[0] = IDEFLOPPY_READ_CAPACITY_CMD; 1166 pc->c[7] = 255; 1167 pc->c[8] = 255; 1168 pc->request_transfer = 255; 1169} 1170 1171static void idefloppy_create_format_unit_cmd (idefloppy_pc_t *pc, int b, int l, 1172 int flags) 1173{ 1174 idefloppy_init_pc(pc); 1175 pc->c[0] = IDEFLOPPY_FORMAT_UNIT_CMD; 1176 pc->c[1] = 0x17; 1177 1178 memset(pc->buffer, 0, 12); 1179 pc->buffer[1] = 0xA2; 1180 /* Default format list header, u8 1: FOV/DCRT/IMM bits set */ 1181 1182 if (flags & 1) /* Verify bit on... */ 1183 pc->buffer[1] ^= 0x20; /* ... turn off DCRT bit */ 1184 pc->buffer[3] = 8; 1185 1186 put_unaligned(htonl(b), (unsigned int *)(&pc->buffer[4])); 1187 put_unaligned(htonl(l), (unsigned int *)(&pc->buffer[8])); 1188 pc->buffer_size=12; 1189 set_bit(PC_WRITING, &pc->flags); 1190} 1191 1192/* 1193 * A mode sense command is used to "sense" floppy parameters. 1194 */ 1195static void idefloppy_create_mode_sense_cmd (idefloppy_pc_t *pc, u8 page_code, u8 type) 1196{ 1197 u16 length = sizeof(idefloppy_mode_parameter_header_t); 1198 1199 idefloppy_init_pc(pc); 1200 pc->c[0] = IDEFLOPPY_MODE_SENSE_CMD; 1201 pc->c[1] = 0; 1202 pc->c[2] = page_code + (type << 6); 1203 1204 switch (page_code) { 1205 case IDEFLOPPY_CAPABILITIES_PAGE: 1206 length += 12; 1207 break; 1208 case IDEFLOPPY_FLEXIBLE_DISK_PAGE: 1209 length += 32; 1210 break; 1211 default: 1212 printk(KERN_ERR "ide-floppy: unsupported page code " 1213 "in create_mode_sense_cmd\n"); 1214 } 1215 put_unaligned(htons(length), (u16 *) &pc->c[7]); 1216 pc->request_transfer = length; 1217} 1218 1219static void idefloppy_create_start_stop_cmd (idefloppy_pc_t *pc, int start) 1220{ 1221 idefloppy_init_pc(pc); 1222 pc->c[0] = IDEFLOPPY_START_STOP_CMD; 1223 pc->c[4] = start; 1224} 1225 1226static void idefloppy_create_test_unit_ready_cmd(idefloppy_pc_t *pc) 1227{ 1228 idefloppy_init_pc(pc); 1229 pc->c[0] = IDEFLOPPY_TEST_UNIT_READY_CMD; 1230} 1231 1232static void idefloppy_create_rw_cmd (idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq, unsigned long sector) 1233{ 1234 int block = sector / floppy->bs_factor; 1235 int blocks = rq->nr_sectors / floppy->bs_factor; 1236 int cmd = rq_data_dir(rq); 1237 1238 debug_log("create_rw1%d_cmd: block == %d, blocks == %d\n", 1239 2 * test_bit (IDEFLOPPY_USE_READ12, &floppy->flags), 1240 block, blocks); 1241 1242 idefloppy_init_pc(pc); 1243 if (test_bit(IDEFLOPPY_USE_READ12, &floppy->flags)) { 1244 pc->c[0] = cmd == READ ? IDEFLOPPY_READ12_CMD : IDEFLOPPY_WRITE12_CMD; 1245 put_unaligned(htonl(blocks), (unsigned int *) &pc->c[6]); 1246 } else { 1247 pc->c[0] = cmd == READ ? IDEFLOPPY_READ10_CMD : IDEFLOPPY_WRITE10_CMD; 1248 put_unaligned(htons(blocks), (unsigned short *) &pc->c[7]); 1249 } 1250 put_unaligned(htonl(block), (unsigned int *) &pc->c[2]); 1251 pc->callback = &idefloppy_rw_callback; 1252 pc->rq = rq; 1253 pc->b_count = cmd == READ ? 0 : rq->bio->bi_size; 1254 if (rq->cmd_flags & REQ_RW) 1255 set_bit(PC_WRITING, &pc->flags); 1256 pc->buffer = NULL; 1257 pc->request_transfer = pc->buffer_size = blocks * floppy->block_size; 1258 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1259} 1260 1261static void 1262idefloppy_blockpc_cmd(idefloppy_floppy_t *floppy, idefloppy_pc_t *pc, struct request *rq) 1263{ 1264 idefloppy_init_pc(pc); 1265 pc->callback = &idefloppy_rw_callback; 1266 memcpy(pc->c, rq->cmd, sizeof(pc->c)); 1267 pc->rq = rq; 1268 pc->b_count = rq->data_len; 1269 if (rq->data_len && rq_data_dir(rq) == WRITE) 1270 set_bit(PC_WRITING, &pc->flags); 1271 pc->buffer = rq->data; 1272 if (rq->bio) 1273 set_bit(PC_DMA_RECOMMENDED, &pc->flags); 1274 1275 /* 1276 * possibly problematic, doesn't look like ide-floppy correctly 1277 * handled scattered requests if dma fails... 1278 */ 1279 pc->request_transfer = pc->buffer_size = rq->data_len; 1280} 1281 1282/* 1283 * idefloppy_do_request is our request handling function. 1284 */ 1285static ide_startstop_t idefloppy_do_request (ide_drive_t *drive, struct request *rq, sector_t block_s) 1286{ 1287 idefloppy_floppy_t *floppy = drive->driver_data; 1288 idefloppy_pc_t *pc; 1289 unsigned long block = (unsigned long)block_s; 1290 1291 debug_log(KERN_INFO "dev: %s, flags: %lx, errors: %d\n", 1292 rq->rq_disk ? rq->rq_disk->disk_name : "?", 1293 rq->flags, rq->errors); 1294 debug_log(KERN_INFO "sector: %ld, nr_sectors: %ld, " 1295 "current_nr_sectors: %d\n", (long)rq->sector, 1296 rq->nr_sectors, rq->current_nr_sectors); 1297 1298 if (rq->errors >= ERROR_MAX) { 1299 if (floppy->failed_pc != NULL) { 1300 if (idefloppy_should_report_error(floppy)) 1301 printk(KERN_ERR "ide-floppy: %s: I/O error, pc = %2x," 1302 " key = %2x, asc = %2x, ascq = %2x\n", 1303 drive->name, floppy->failed_pc->c[0], 1304 floppy->sense_key, floppy->asc, floppy->ascq); 1305 } 1306 else 1307 printk(KERN_ERR "ide-floppy: %s: I/O error\n", 1308 drive->name); 1309 idefloppy_do_end_request(drive, 0, 0); 1310 return ide_stopped; 1311 } 1312 if (blk_fs_request(rq)) { 1313 if (((long)rq->sector % floppy->bs_factor) || 1314 (rq->nr_sectors % floppy->bs_factor)) { 1315 printk("%s: unsupported r/w request size\n", 1316 drive->name); 1317 idefloppy_do_end_request(drive, 0, 0); 1318 return ide_stopped; 1319 } 1320 pc = idefloppy_next_pc_storage(drive); 1321 idefloppy_create_rw_cmd(floppy, pc, rq, block); 1322 } else if (blk_special_request(rq)) { 1323 pc = (idefloppy_pc_t *) rq->buffer; 1324 } else if (blk_pc_request(rq)) { 1325 pc = idefloppy_next_pc_storage(drive); 1326 idefloppy_blockpc_cmd(floppy, pc, rq); 1327 } else { 1328 blk_dump_rq_flags(rq, 1329 "ide-floppy: unsupported command in queue"); 1330 idefloppy_do_end_request(drive, 0, 0); 1331 return ide_stopped; 1332 } 1333 1334 pc->rq = rq; 1335 return idefloppy_issue_pc(drive, pc); 1336} 1337 1338/* 1339 * idefloppy_queue_pc_tail adds a special packet command request to the 1340 * tail of the request queue, and waits for it to be serviced. 1341 */ 1342static int idefloppy_queue_pc_tail (ide_drive_t *drive,idefloppy_pc_t *pc) 1343{ 1344 struct ide_floppy_obj *floppy = drive->driver_data; 1345 struct request rq; 1346 1347 ide_init_drive_cmd (&rq); 1348 rq.buffer = (char *) pc; 1349 rq.cmd_type = REQ_TYPE_SPECIAL; 1350 rq.rq_disk = floppy->disk; 1351 1352 return ide_do_drive_cmd(drive, &rq, ide_wait); 1353} 1354 1355/* 1356 * Look at the flexible disk page parameters. We will ignore the CHS 1357 * capacity parameters and use the LBA parameters instead. 1358 */ 1359static int idefloppy_get_flexible_disk_page (ide_drive_t *drive) 1360{ 1361 idefloppy_floppy_t *floppy = drive->driver_data; 1362 idefloppy_pc_t pc; 1363 idefloppy_mode_parameter_header_t *header; 1364 idefloppy_flexible_disk_page_t *page; 1365 int capacity, lba_capacity; 1366 1367 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_FLEXIBLE_DISK_PAGE, MODE_SENSE_CURRENT); 1368 if (idefloppy_queue_pc_tail(drive,&pc)) { 1369 printk(KERN_ERR "ide-floppy: Can't get flexible disk " 1370 "page parameters\n"); 1371 return 1; 1372 } 1373 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1374 floppy->wp = header->wp; 1375 set_disk_ro(floppy->disk, floppy->wp); 1376 page = (idefloppy_flexible_disk_page_t *) (header + 1); 1377 1378 page->transfer_rate = ntohs(page->transfer_rate); 1379 page->sector_size = ntohs(page->sector_size); 1380 page->cyls = ntohs(page->cyls); 1381 page->rpm = ntohs(page->rpm); 1382 capacity = page->cyls * page->heads * page->sectors * page->sector_size; 1383 if (memcmp (page, &floppy->flexible_disk_page, sizeof (idefloppy_flexible_disk_page_t))) 1384 printk(KERN_INFO "%s: %dkB, %d/%d/%d CHS, %d kBps, " 1385 "%d sector size, %d rpm\n", 1386 drive->name, capacity / 1024, page->cyls, 1387 page->heads, page->sectors, 1388 page->transfer_rate / 8, page->sector_size, page->rpm); 1389 1390 floppy->flexible_disk_page = *page; 1391 drive->bios_cyl = page->cyls; 1392 drive->bios_head = page->heads; 1393 drive->bios_sect = page->sectors; 1394 lba_capacity = floppy->blocks * floppy->block_size; 1395 if (capacity < lba_capacity) { 1396 printk(KERN_NOTICE "%s: The disk reports a capacity of %d " 1397 "bytes, but the drive only handles %d\n", 1398 drive->name, lba_capacity, capacity); 1399 floppy->blocks = floppy->block_size ? capacity / floppy->block_size : 0; 1400 } 1401 return 0; 1402} 1403 1404static int idefloppy_get_capability_page(ide_drive_t *drive) 1405{ 1406 idefloppy_floppy_t *floppy = drive->driver_data; 1407 idefloppy_pc_t pc; 1408 idefloppy_mode_parameter_header_t *header; 1409 idefloppy_capabilities_page_t *page; 1410 1411 floppy->srfp = 0; 1412 idefloppy_create_mode_sense_cmd(&pc, IDEFLOPPY_CAPABILITIES_PAGE, 1413 MODE_SENSE_CURRENT); 1414 1415 set_bit(PC_SUPPRESS_ERROR, &pc.flags); 1416 if (idefloppy_queue_pc_tail(drive,&pc)) { 1417 return 1; 1418 } 1419 1420 header = (idefloppy_mode_parameter_header_t *) pc.buffer; 1421 page= (idefloppy_capabilities_page_t *)(header+1); 1422 floppy->srfp = page->srfp; 1423 return (0); 1424} 1425 1426/* 1427 * Determine if a media is present in the floppy drive, and if so, 1428 * its LBA capacity. 1429 */ 1430static int idefloppy_get_capacity (ide_drive_t *drive) 1431{ 1432 idefloppy_floppy_t *floppy = drive->driver_data; 1433 idefloppy_pc_t pc; 1434 idefloppy_capacity_header_t *header; 1435 idefloppy_capacity_descriptor_t *descriptor; 1436 int i, descriptors, rc = 1, blocks, length; 1437 1438 drive->bios_cyl = 0; 1439 drive->bios_head = drive->bios_sect = 0; 1440 floppy->blocks = 0; 1441 floppy->bs_factor = 1; 1442 set_capacity(floppy->disk, 0); 1443 1444 idefloppy_create_read_capacity_cmd(&pc); 1445 if (idefloppy_queue_pc_tail(drive, &pc)) { 1446 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1447 return 1; 1448 } 1449 header = (idefloppy_capacity_header_t *) pc.buffer; 1450 descriptors = header->length / sizeof(idefloppy_capacity_descriptor_t); 1451 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1452 1453 for (i = 0; i < descriptors; i++, descriptor++) { 1454 blocks = descriptor->blocks = ntohl(descriptor->blocks); 1455 length = descriptor->length = ntohs(descriptor->length); 1456 1457 if (!i) 1458 { 1459 switch (descriptor->dc) { 1460 /* Clik! drive returns this instead of CAPACITY_CURRENT */ 1461 case CAPACITY_UNFORMATTED: 1462 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) 1463 /* 1464 * If it is not a clik drive, break out 1465 * (maintains previous driver behaviour) 1466 */ 1467 break; 1468 case CAPACITY_CURRENT: 1469 /* Normal Zip/LS-120 disks */ 1470 if (memcmp(descriptor, &floppy->capacity, sizeof (idefloppy_capacity_descriptor_t))) 1471 printk(KERN_INFO "%s: %dkB, %d blocks, %d " 1472 "sector size\n", drive->name, 1473 blocks * length / 1024, blocks, length); 1474 floppy->capacity = *descriptor; 1475 if (!length || length % 512) { 1476 printk(KERN_NOTICE "%s: %d bytes block size " 1477 "not supported\n", drive->name, length); 1478 } else { 1479 floppy->blocks = blocks; 1480 floppy->block_size = length; 1481 if ((floppy->bs_factor = length / 512) != 1) 1482 printk(KERN_NOTICE "%s: warning: non " 1483 "512 bytes block size not " 1484 "fully supported\n", 1485 drive->name); 1486 rc = 0; 1487 } 1488 break; 1489 case CAPACITY_NO_CARTRIDGE: 1490 /* 1491 * This is a KERN_ERR so it appears on screen 1492 * for the user to see 1493 */ 1494 printk(KERN_ERR "%s: No disk in drive\n", drive->name); 1495 break; 1496 case CAPACITY_INVALID: 1497 printk(KERN_ERR "%s: Invalid capacity for disk " 1498 "in drive\n", drive->name); 1499 break; 1500 } 1501 } 1502 if (!i) { 1503 debug_log( "Descriptor 0 Code: %d\n", 1504 descriptor->dc); 1505 } 1506 debug_log( "Descriptor %d: %dkB, %d blocks, %d " 1507 "sector size\n", i, blocks * length / 1024, blocks, 1508 length); 1509 } 1510 1511 /* Clik! disk does not support get_flexible_disk_page */ 1512 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1513 (void) idefloppy_get_flexible_disk_page(drive); 1514 } 1515 1516 set_capacity(floppy->disk, floppy->blocks * floppy->bs_factor); 1517 return rc; 1518} 1519 1520/* 1521** Obtain the list of formattable capacities. 1522** Very similar to idefloppy_get_capacity, except that we push the capacity 1523** descriptors to userland, instead of our own structures. 1524** 1525** Userland gives us the following structure: 1526** 1527** struct idefloppy_format_capacities { 1528** int nformats; 1529** struct { 1530** int nblocks; 1531** int blocksize; 1532** } formats[]; 1533** } ; 1534** 1535** userland initializes nformats to the number of allocated formats[] 1536** records. On exit we set nformats to the number of records we've 1537** actually initialized. 1538** 1539*/ 1540 1541static int idefloppy_get_format_capacities(ide_drive_t *drive, int __user *arg) 1542{ 1543 idefloppy_pc_t pc; 1544 idefloppy_capacity_header_t *header; 1545 idefloppy_capacity_descriptor_t *descriptor; 1546 int i, descriptors, blocks, length; 1547 int u_array_size; 1548 int u_index; 1549 int __user *argp; 1550 1551 if (get_user(u_array_size, arg)) 1552 return (-EFAULT); 1553 1554 if (u_array_size <= 0) 1555 return (-EINVAL); 1556 1557 idefloppy_create_read_capacity_cmd(&pc); 1558 if (idefloppy_queue_pc_tail(drive, &pc)) { 1559 printk(KERN_ERR "ide-floppy: Can't get floppy parameters\n"); 1560 return (-EIO); 1561 } 1562 header = (idefloppy_capacity_header_t *) pc.buffer; 1563 descriptors = header->length / 1564 sizeof(idefloppy_capacity_descriptor_t); 1565 descriptor = (idefloppy_capacity_descriptor_t *) (header + 1); 1566 1567 u_index = 0; 1568 argp = arg + 1; 1569 1570 /* 1571 ** We always skip the first capacity descriptor. That's the 1572 ** current capacity. We are interested in the remaining descriptors, 1573 ** the formattable capacities. 1574 */ 1575 1576 for (i=0; i<descriptors; i++, descriptor++) { 1577 if (u_index >= u_array_size) 1578 break; /* User-supplied buffer too small */ 1579 if (i == 0) 1580 continue; /* Skip the first descriptor */ 1581 1582 blocks = ntohl(descriptor->blocks); 1583 length = ntohs(descriptor->length); 1584 1585 if (put_user(blocks, argp)) 1586 return(-EFAULT); 1587 ++argp; 1588 1589 if (put_user(length, argp)) 1590 return (-EFAULT); 1591 ++argp; 1592 1593 ++u_index; 1594 } 1595 1596 if (put_user(u_index, arg)) 1597 return (-EFAULT); 1598 return (0); 1599} 1600 1601/* 1602** Send ATAPI_FORMAT_UNIT to the drive. 1603** 1604** Userland gives us the following structure: 1605** 1606** struct idefloppy_format_command { 1607** int nblocks; 1608** int blocksize; 1609** int flags; 1610** } ; 1611** 1612** flags is a bitmask, currently, the only defined flag is: 1613** 1614** 0x01 - verify media after format. 1615*/ 1616 1617static int idefloppy_begin_format(ide_drive_t *drive, int __user *arg) 1618{ 1619 int blocks; 1620 int length; 1621 int flags; 1622 idefloppy_pc_t pc; 1623 1624 if (get_user(blocks, arg) || 1625 get_user(length, arg+1) || 1626 get_user(flags, arg+2)) { 1627 return (-EFAULT); 1628 } 1629 1630 /* Get the SFRP bit */ 1631 (void) idefloppy_get_capability_page(drive); 1632 idefloppy_create_format_unit_cmd(&pc, blocks, length, flags); 1633 if (idefloppy_queue_pc_tail(drive, &pc)) { 1634 return (-EIO); 1635 } 1636 1637 return (0); 1638} 1639 1640/* 1641** Get ATAPI_FORMAT_UNIT progress indication. 1642** 1643** Userland gives a pointer to an int. The int is set to a progress 1644** indicator 0-65536, with 65536=100%. 1645** 1646** If the drive does not support format progress indication, we just check 1647** the dsc bit, and return either 0 or 65536. 1648*/ 1649 1650static int idefloppy_get_format_progress(ide_drive_t *drive, int __user *arg) 1651{ 1652 idefloppy_floppy_t *floppy = drive->driver_data; 1653 idefloppy_pc_t pc; 1654 int progress_indication = 0x10000; 1655 1656 if (floppy->srfp) { 1657 idefloppy_create_request_sense_cmd(&pc); 1658 if (idefloppy_queue_pc_tail(drive, &pc)) { 1659 return (-EIO); 1660 } 1661 1662 if (floppy->sense_key == 2 && 1663 floppy->asc == 4 && 1664 floppy->ascq == 4) { 1665 progress_indication = floppy->progress_indication; 1666 } 1667 /* Else assume format_unit has finished, and we're 1668 ** at 0x10000 */ 1669 } else { 1670 atapi_status_t status; 1671 unsigned long flags; 1672 1673 local_irq_save(flags); 1674 status.all = HWIF(drive)->INB(IDE_STATUS_REG); 1675 local_irq_restore(flags); 1676 1677 progress_indication = !status.b.dsc ? 0 : 0x10000; 1678 } 1679 if (put_user(progress_indication, arg)) 1680 return (-EFAULT); 1681 1682 return (0); 1683} 1684 1685/* 1686 * Return the current floppy capacity. 1687 */ 1688static sector_t idefloppy_capacity (ide_drive_t *drive) 1689{ 1690 idefloppy_floppy_t *floppy = drive->driver_data; 1691 unsigned long capacity = floppy->blocks * floppy->bs_factor; 1692 1693 return capacity; 1694} 1695 1696/* 1697 * idefloppy_identify_device checks if we can support a drive, 1698 * based on the ATAPI IDENTIFY command results. 1699 */ 1700static int idefloppy_identify_device (ide_drive_t *drive,struct hd_driveid *id) 1701{ 1702 struct idefloppy_id_gcw gcw; 1703#if IDEFLOPPY_DEBUG_INFO 1704 u16 mask,i; 1705 char buffer[80]; 1706#endif /* IDEFLOPPY_DEBUG_INFO */ 1707 1708 *((u16 *) &gcw) = id->config; 1709 1710#ifdef CONFIG_PPC 1711 /* kludge for Apple PowerBook internal zip */ 1712 if ((gcw.device_type == 5) && 1713 !strstr(id->model, "CD-ROM") && 1714 strstr(id->model, "ZIP")) 1715 gcw.device_type = 0; 1716#endif 1717 1718#if IDEFLOPPY_DEBUG_INFO 1719 printk(KERN_INFO "Dumping ATAPI Identify Device floppy parameters\n"); 1720 switch (gcw.protocol) { 1721 case 0: case 1: sprintf(buffer, "ATA");break; 1722 case 2: sprintf(buffer, "ATAPI");break; 1723 case 3: sprintf(buffer, "Reserved (Unknown to ide-floppy)");break; 1724 } 1725 printk(KERN_INFO "Protocol Type: %s\n", buffer); 1726 switch (gcw.device_type) { 1727 case 0: sprintf(buffer, "Direct-access Device");break; 1728 case 1: sprintf(buffer, "Streaming Tape Device");break; 1729 case 2: case 3: case 4: sprintf (buffer, "Reserved");break; 1730 case 5: sprintf(buffer, "CD-ROM Device");break; 1731 case 6: sprintf(buffer, "Reserved"); 1732 case 7: sprintf(buffer, "Optical memory Device");break; 1733 case 0x1f: sprintf(buffer, "Unknown or no Device type");break; 1734 default: sprintf(buffer, "Reserved"); 1735 } 1736 printk(KERN_INFO "Device Type: %x - %s\n", gcw.device_type, buffer); 1737 printk(KERN_INFO "Removable: %s\n",gcw.removable ? "Yes":"No"); 1738 switch (gcw.drq_type) { 1739 case 0: sprintf(buffer, "Microprocessor DRQ");break; 1740 case 1: sprintf(buffer, "Interrupt DRQ");break; 1741 case 2: sprintf(buffer, "Accelerated DRQ");break; 1742 case 3: sprintf(buffer, "Reserved");break; 1743 } 1744 printk(KERN_INFO "Command Packet DRQ Type: %s\n", buffer); 1745 switch (gcw.packet_size) { 1746 case 0: sprintf(buffer, "12 bytes");break; 1747 case 1: sprintf(buffer, "16 bytes");break; 1748 default: sprintf(buffer, "Reserved");break; 1749 } 1750 printk(KERN_INFO "Command Packet Size: %s\n", buffer); 1751 printk(KERN_INFO "Model: %.40s\n",id->model); 1752 printk(KERN_INFO "Firmware Revision: %.8s\n",id->fw_rev); 1753 printk(KERN_INFO "Serial Number: %.20s\n",id->serial_no); 1754 printk(KERN_INFO "Write buffer size(?): %d bytes\n",id->buf_size*512); 1755 printk(KERN_INFO "DMA: %s",id->capability & 0x01 ? "Yes\n":"No\n"); 1756 printk(KERN_INFO "LBA: %s",id->capability & 0x02 ? "Yes\n":"No\n"); 1757 printk(KERN_INFO "IORDY can be disabled: %s",id->capability & 0x04 ? "Yes\n":"No\n"); 1758 printk(KERN_INFO "IORDY supported: %s",id->capability & 0x08 ? "Yes\n":"Unknown\n"); 1759 printk(KERN_INFO "ATAPI overlap supported: %s",id->capability & 0x20 ? "Yes\n":"No\n"); 1760 printk(KERN_INFO "PIO Cycle Timing Category: %d\n",id->tPIO); 1761 printk(KERN_INFO "DMA Cycle Timing Category: %d\n",id->tDMA); 1762 printk(KERN_INFO "Single Word DMA supported modes:\n"); 1763 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1764 if (id->dma_1word & mask) 1765 printk(KERN_INFO " Mode %d%s\n", i, 1766 (id->dma_1word & (mask << 8)) ? " (active)" : ""); 1767 } 1768 printk(KERN_INFO "Multi Word DMA supported modes:\n"); 1769 for (i=0,mask=1;i<8;i++,mask=mask << 1) { 1770 if (id->dma_mword & mask) 1771 printk(KERN_INFO " Mode %d%s\n", i, 1772 (id->dma_mword & (mask << 8)) ? " (active)" : ""); 1773 } 1774 if (id->field_valid & 0x0002) { 1775 printk(KERN_INFO "Enhanced PIO Modes: %s\n", 1776 id->eide_pio_modes & 1 ? "Mode 3":"None"); 1777 if (id->eide_dma_min == 0) 1778 sprintf(buffer, "Not supported"); 1779 else 1780 sprintf(buffer, "%d ns",id->eide_dma_min); 1781 printk(KERN_INFO "Minimum Multi-word DMA cycle per word: %s\n", buffer); 1782 if (id->eide_dma_time == 0) 1783 sprintf(buffer, "Not supported"); 1784 else 1785 sprintf(buffer, "%d ns",id->eide_dma_time); 1786 printk(KERN_INFO "Manufacturer\'s Recommended Multi-word cycle: %s\n", buffer); 1787 if (id->eide_pio == 0) 1788 sprintf(buffer, "Not supported"); 1789 else 1790 sprintf(buffer, "%d ns",id->eide_pio); 1791 printk(KERN_INFO "Minimum PIO cycle without IORDY: %s\n", 1792 buffer); 1793 if (id->eide_pio_iordy == 0) 1794 sprintf(buffer, "Not supported"); 1795 else 1796 sprintf(buffer, "%d ns",id->eide_pio_iordy); 1797 printk(KERN_INFO "Minimum PIO cycle with IORDY: %s\n", buffer); 1798 } else 1799 printk(KERN_INFO "According to the device, fields 64-70 are not valid.\n"); 1800#endif /* IDEFLOPPY_DEBUG_INFO */ 1801 1802 if (gcw.protocol != 2) 1803 printk(KERN_ERR "ide-floppy: Protocol is not ATAPI\n"); 1804 else if (gcw.device_type != 0) 1805 printk(KERN_ERR "ide-floppy: Device type is not set to floppy\n"); 1806 else if (!gcw.removable) 1807 printk(KERN_ERR "ide-floppy: The removable flag is not set\n"); 1808 else if (gcw.drq_type == 3) { 1809 printk(KERN_ERR "ide-floppy: Sorry, DRQ type %d not supported\n", gcw.drq_type); 1810 } else if (gcw.packet_size != 0) { 1811 printk(KERN_ERR "ide-floppy: Packet size is not 12 bytes long\n"); 1812 } else 1813 return 1; 1814 return 0; 1815} 1816 1817#ifdef CONFIG_IDE_PROC_FS 1818static void idefloppy_add_settings(ide_drive_t *drive) 1819{ 1820 idefloppy_floppy_t *floppy = drive->driver_data; 1821 1822/* 1823 * drive setting name read/write data type min max mul_factor div_factor data pointer set function 1824 */ 1825 ide_add_setting(drive, "bios_cyl", SETTING_RW, TYPE_INT, 0, 1023, 1, 1, &drive->bios_cyl, NULL); 1826 ide_add_setting(drive, "bios_head", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &drive->bios_head, NULL); 1827 ide_add_setting(drive, "bios_sect", SETTING_RW, TYPE_BYTE, 0, 63, 1, 1, &drive->bios_sect, NULL); 1828 ide_add_setting(drive, "ticks", SETTING_RW, TYPE_BYTE, 0, 255, 1, 1, &floppy->ticks, NULL); 1829} 1830#else 1831static inline void idefloppy_add_settings(ide_drive_t *drive) { ; } 1832#endif 1833 1834/* 1835 * Driver initialization. 1836 */ 1837static void idefloppy_setup (ide_drive_t *drive, idefloppy_floppy_t *floppy) 1838{ 1839 struct idefloppy_id_gcw gcw; 1840 1841 *((u16 *) &gcw) = drive->id->config; 1842 floppy->pc = floppy->pc_stack; 1843 if (gcw.drq_type == 1) 1844 set_bit(IDEFLOPPY_DRQ_INTERRUPT, &floppy->flags); 1845 /* 1846 * We used to check revisions here. At this point however 1847 * I'm giving up. Just assume they are all broken, its easier. 1848 * 1849 * The actual reason for the workarounds was likely 1850 * a driver bug after all rather than a firmware bug, 1851 * and the workaround below used to hide it. It should 1852 * be fixed as of version 1.9, but to be on the safe side 1853 * we'll leave the limitation below for the 2.2.x tree. 1854 */ 1855 1856 if (!strncmp(drive->id->model, "IOMEGA ZIP 100 ATAPI", 20)) { 1857 set_bit(IDEFLOPPY_ZIP_DRIVE, &floppy->flags); 1858 /* This value will be visible in the /proc/ide/hdx/settings */ 1859 floppy->ticks = IDEFLOPPY_TICKS_DELAY; 1860 blk_queue_max_sectors(drive->queue, 64); 1861 } 1862 1863 /* 1864 * Guess what? The IOMEGA Clik! drive also needs the 1865 * above fix. It makes nasty clicking noises without 1866 * it, so please don't remove this. 1867 */ 1868 if (strncmp(drive->id->model, "IOMEGA Clik!", 11) == 0) { 1869 blk_queue_max_sectors(drive->queue, 64); 1870 set_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags); 1871 } 1872 1873 1874 (void) idefloppy_get_capacity(drive); 1875 idefloppy_add_settings(drive); 1876} 1877 1878static void ide_floppy_remove(ide_drive_t *drive) 1879{ 1880 idefloppy_floppy_t *floppy = drive->driver_data; 1881 struct gendisk *g = floppy->disk; 1882 1883 ide_proc_unregister_driver(drive, floppy->driver); 1884 1885 del_gendisk(g); 1886 1887 ide_floppy_put(floppy); 1888} 1889 1890static void ide_floppy_release(struct kref *kref) 1891{ 1892 struct ide_floppy_obj *floppy = to_ide_floppy(kref); 1893 ide_drive_t *drive = floppy->drive; 1894 struct gendisk *g = floppy->disk; 1895 1896 drive->driver_data = NULL; 1897 g->private_data = NULL; 1898 put_disk(g); 1899 kfree(floppy); 1900} 1901 1902#ifdef CONFIG_IDE_PROC_FS 1903static int proc_idefloppy_read_capacity 1904 (char *page, char **start, off_t off, int count, int *eof, void *data) 1905{ 1906 ide_drive_t*drive = (ide_drive_t *)data; 1907 int len; 1908 1909 len = sprintf(page,"%llu\n", (long long)idefloppy_capacity(drive)); 1910 PROC_IDE_READ_RETURN(page,start,off,count,eof,len); 1911} 1912 1913static ide_proc_entry_t idefloppy_proc[] = { 1914 { "capacity", S_IFREG|S_IRUGO, proc_idefloppy_read_capacity, NULL }, 1915 { "geometry", S_IFREG|S_IRUGO, proc_ide_read_geometry, NULL }, 1916 { NULL, 0, NULL, NULL } 1917}; 1918#endif /* CONFIG_IDE_PROC_FS */ 1919 1920static int ide_floppy_probe(ide_drive_t *); 1921 1922static ide_driver_t idefloppy_driver = { 1923 .gen_driver = { 1924 .owner = THIS_MODULE, 1925 .name = "ide-floppy", 1926 .bus = &ide_bus_type, 1927 }, 1928 .probe = ide_floppy_probe, 1929 .remove = ide_floppy_remove, 1930 .version = IDEFLOPPY_VERSION, 1931 .media = ide_floppy, 1932 .supports_dsc_overlap = 0, 1933 .do_request = idefloppy_do_request, 1934 .end_request = idefloppy_do_end_request, 1935 .error = __ide_error, 1936 .abort = __ide_abort, 1937#ifdef CONFIG_IDE_PROC_FS 1938 .proc = idefloppy_proc, 1939#endif 1940}; 1941 1942static int idefloppy_open(struct inode *inode, struct file *filp) 1943{ 1944 struct gendisk *disk = inode->i_bdev->bd_disk; 1945 struct ide_floppy_obj *floppy; 1946 ide_drive_t *drive; 1947 idefloppy_pc_t pc; 1948 int ret = 0; 1949 1950 debug_log(KERN_INFO "Reached idefloppy_open\n"); 1951 1952 if (!(floppy = ide_floppy_get(disk))) 1953 return -ENXIO; 1954 1955 drive = floppy->drive; 1956 1957 floppy->openers++; 1958 1959 if (floppy->openers == 1) { 1960 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 1961 /* Just in case */ 1962 1963 idefloppy_create_test_unit_ready_cmd(&pc); 1964 if (idefloppy_queue_pc_tail(drive, &pc)) { 1965 idefloppy_create_start_stop_cmd(&pc, 1); 1966 (void) idefloppy_queue_pc_tail(drive, &pc); 1967 } 1968 1969 if (idefloppy_get_capacity (drive) 1970 && (filp->f_flags & O_NDELAY) == 0 1971 /* 1972 ** Allow O_NDELAY to open a drive without a disk, or with 1973 ** an unreadable disk, so that we can get the format 1974 ** capacity of the drive or begin the format - Sam 1975 */ 1976 ) { 1977 ret = -EIO; 1978 goto out_put_floppy; 1979 } 1980 1981 if (floppy->wp && (filp->f_mode & 2)) { 1982 ret = -EROFS; 1983 goto out_put_floppy; 1984 } 1985 set_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 1986 /* IOMEGA Clik! drives do not support lock/unlock commands */ 1987 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 1988 idefloppy_create_prevent_cmd(&pc, 1); 1989 (void) idefloppy_queue_pc_tail(drive, &pc); 1990 } 1991 check_disk_change(inode->i_bdev); 1992 } else if (test_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags)) { 1993 ret = -EBUSY; 1994 goto out_put_floppy; 1995 } 1996 return 0; 1997 1998out_put_floppy: 1999 floppy->openers--; 2000 ide_floppy_put(floppy); 2001 return ret; 2002} 2003 2004static int idefloppy_release(struct inode *inode, struct file *filp) 2005{ 2006 struct gendisk *disk = inode->i_bdev->bd_disk; 2007 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2008 ide_drive_t *drive = floppy->drive; 2009 idefloppy_pc_t pc; 2010 2011 debug_log(KERN_INFO "Reached idefloppy_release\n"); 2012 2013 if (floppy->openers == 1) { 2014 /* IOMEGA Clik! drives do not support lock/unlock commands */ 2015 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2016 idefloppy_create_prevent_cmd(&pc, 0); 2017 (void) idefloppy_queue_pc_tail(drive, &pc); 2018 } 2019 2020 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2021 } 2022 2023 floppy->openers--; 2024 2025 ide_floppy_put(floppy); 2026 2027 return 0; 2028} 2029 2030static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo) 2031{ 2032 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2033 ide_drive_t *drive = floppy->drive; 2034 2035 geo->heads = drive->bios_head; 2036 geo->sectors = drive->bios_sect; 2037 geo->cylinders = (u16)drive->bios_cyl; /* truncate */ 2038 return 0; 2039} 2040 2041static int idefloppy_ioctl(struct inode *inode, struct file *file, 2042 unsigned int cmd, unsigned long arg) 2043{ 2044 struct block_device *bdev = inode->i_bdev; 2045 struct ide_floppy_obj *floppy = ide_floppy_g(bdev->bd_disk); 2046 ide_drive_t *drive = floppy->drive; 2047 void __user *argp = (void __user *)arg; 2048 int err; 2049 int prevent = (arg) ? 1 : 0; 2050 idefloppy_pc_t pc; 2051 2052 switch (cmd) { 2053 case CDROMEJECT: 2054 prevent = 0; 2055 /* fall through */ 2056 case CDROM_LOCKDOOR: 2057 if (floppy->openers > 1) 2058 return -EBUSY; 2059 2060 /* The IOMEGA Clik! Drive doesn't support this command - no room for an eject mechanism */ 2061 if (!test_bit(IDEFLOPPY_CLIK_DRIVE, &floppy->flags)) { 2062 idefloppy_create_prevent_cmd(&pc, prevent); 2063 (void) idefloppy_queue_pc_tail(drive, &pc); 2064 } 2065 if (cmd == CDROMEJECT) { 2066 idefloppy_create_start_stop_cmd(&pc, 2); 2067 (void) idefloppy_queue_pc_tail(drive, &pc); 2068 } 2069 return 0; 2070 case IDEFLOPPY_IOCTL_FORMAT_SUPPORTED: 2071 return 0; 2072 case IDEFLOPPY_IOCTL_FORMAT_GET_CAPACITY: 2073 return idefloppy_get_format_capacities(drive, argp); 2074 case IDEFLOPPY_IOCTL_FORMAT_START: 2075 2076 if (!(file->f_mode & 2)) 2077 return -EPERM; 2078 2079 if (floppy->openers > 1) { 2080 /* Don't format if someone is using the disk */ 2081 2082 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, 2083 &floppy->flags); 2084 return -EBUSY; 2085 } 2086 2087 set_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2088 2089 err = idefloppy_begin_format(drive, argp); 2090 if (err) 2091 clear_bit(IDEFLOPPY_FORMAT_IN_PROGRESS, &floppy->flags); 2092 return err; 2093 /* 2094 ** Note, the bit will be cleared when the device is 2095 ** closed. This is the cleanest way to handle the 2096 ** situation where the drive does not support 2097 ** format progress reporting. 2098 */ 2099 case IDEFLOPPY_IOCTL_FORMAT_GET_PROGRESS: 2100 return idefloppy_get_format_progress(drive, argp); 2101 } 2102 return generic_ide_ioctl(drive, file, bdev, cmd, arg); 2103} 2104 2105static int idefloppy_media_changed(struct gendisk *disk) 2106{ 2107 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2108 ide_drive_t *drive = floppy->drive; 2109 2110 /* do not scan partitions twice if this is a removable device */ 2111 if (drive->attach) { 2112 drive->attach = 0; 2113 return 0; 2114 } 2115 return test_and_clear_bit(IDEFLOPPY_MEDIA_CHANGED, &floppy->flags); 2116} 2117 2118static int idefloppy_revalidate_disk(struct gendisk *disk) 2119{ 2120 struct ide_floppy_obj *floppy = ide_floppy_g(disk); 2121 set_capacity(disk, idefloppy_capacity(floppy->drive)); 2122 return 0; 2123} 2124 2125static struct block_device_operations idefloppy_ops = { 2126 .owner = THIS_MODULE, 2127 .open = idefloppy_open, 2128 .release = idefloppy_release, 2129 .ioctl = idefloppy_ioctl, 2130 .getgeo = idefloppy_getgeo, 2131 .media_changed = idefloppy_media_changed, 2132 .revalidate_disk= idefloppy_revalidate_disk 2133}; 2134 2135static int ide_floppy_probe(ide_drive_t *drive) 2136{ 2137 idefloppy_floppy_t *floppy; 2138 struct gendisk *g; 2139 2140 if (!strstr("ide-floppy", drive->driver_req)) 2141 goto failed; 2142 if (!drive->present) 2143 goto failed; 2144 if (drive->media != ide_floppy) 2145 goto failed; 2146 if (!idefloppy_identify_device (drive, drive->id)) { 2147 printk (KERN_ERR "ide-floppy: %s: not supported by this version of ide-floppy\n", drive->name); 2148 goto failed; 2149 } 2150 if (drive->scsi) { 2151 printk("ide-floppy: passing drive %s to ide-scsi emulation.\n", drive->name); 2152 goto failed; 2153 } 2154 if ((floppy = kzalloc(sizeof (idefloppy_floppy_t), GFP_KERNEL)) == NULL) { 2155 printk (KERN_ERR "ide-floppy: %s: Can't allocate a floppy structure\n", drive->name); 2156 goto failed; 2157 } 2158 2159 g = alloc_disk(1 << PARTN_BITS); 2160 if (!g) 2161 goto out_free_floppy; 2162 2163 ide_init_disk(g, drive); 2164 2165 ide_proc_register_driver(drive, &idefloppy_driver); 2166 2167 kref_init(&floppy->kref); 2168 2169 floppy->drive = drive; 2170 floppy->driver = &idefloppy_driver; 2171 floppy->disk = g; 2172 2173 g->private_data = &floppy->driver; 2174 2175 drive->driver_data = floppy; 2176 2177 idefloppy_setup (drive, floppy); 2178 2179 g->minors = 1 << PARTN_BITS; 2180 g->driverfs_dev = &drive->gendev; 2181 g->flags = drive->removable ? GENHD_FL_REMOVABLE : 0; 2182 g->fops = &idefloppy_ops; 2183 drive->attach = 1; 2184 add_disk(g); 2185 return 0; 2186 2187out_free_floppy: 2188 kfree(floppy); 2189failed: 2190 return -ENODEV; 2191} 2192 2193MODULE_DESCRIPTION("ATAPI FLOPPY Driver"); 2194 2195static void __exit idefloppy_exit (void) 2196{ 2197 driver_unregister(&idefloppy_driver.gen_driver); 2198} 2199 2200static int __init idefloppy_init(void) 2201{ 2202 printk("ide-floppy driver " IDEFLOPPY_VERSION "\n"); 2203 return driver_register(&idefloppy_driver.gen_driver); 2204} 2205 2206MODULE_ALIAS("ide:*m-floppy*"); 2207module_init(idefloppy_init); 2208module_exit(idefloppy_exit); 2209MODULE_LICENSE("GPL"); 2210