1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * drivers/block/ataflop.c 4 * 5 * Copyright (C) 1993 Greg Harp 6 * Atari Support by Bjoern Brauel, Roman Hodek 7 * 8 * Big cleanup Sep 11..14 1994 Roman Hodek: 9 * - Driver now works interrupt driven 10 * - Support for two drives; should work, but I cannot test that :-( 11 * - Reading is done in whole tracks and buffered to speed up things 12 * - Disk change detection and drive deselecting after motor-off 13 * similar to TOS 14 * - Autodetection of disk format (DD/HD); untested yet, because I 15 * don't have an HD drive :-( 16 * 17 * Fixes Nov 13 1994 Martin Schaller: 18 * - Autodetection works now 19 * - Support for 5 1/4'' disks 20 * - Removed drive type (unknown on atari) 21 * - Do seeks with 8 Mhz 22 * 23 * Changes by Andreas Schwab: 24 * - After errors in multiple read mode try again reading single sectors 25 * (Feb 1995): 26 * - Clean up error handling 27 * - Set blk_size for proper size checking 28 * - Initialize track register when testing presence of floppy 29 * - Implement some ioctl's 30 * 31 * Changes by Torsten Lang: 32 * - When probing the floppies we should add the FDCCMDADD_H flag since 33 * the FDC will otherwise wait forever when no disk is inserted... 34 * 35 * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: 36 * - MFPDELAY() after each FDC access -> atari 37 * - more/other disk formats 38 * - DMA to the block buffer directly if we have a 32bit DMA 39 * - for medusa, the step rate is always 3ms 40 * - on medusa, use only cache_push() 41 * Roman: 42 * - Make disk format numbering independent from minors 43 * - Let user set max. supported drive type (speeds up format 44 * detection, saves buffer space) 45 * 46 * Roman 10/15/95: 47 * - implement some more ioctls 48 * - disk formatting 49 * 50 * Andreas 95/12/12: 51 * - increase gap size at start of track for HD/ED disks 52 * 53 * Michael (MSch) 11/07/96: 54 * - implemented FDSETPRM and FDDEFPRM ioctl 55 * 56 * Andreas (97/03/19): 57 * - implemented missing BLK* ioctls 58 * 59 * Things left to do: 60 * - Formatting 61 * - Maybe a better strategy for disk change detection (does anyone 62 * know one?) 63 */ 64 65 #include <linux/module.h> 66 67 #include <linux/fd.h> 68 #include <linux/delay.h> 69 #include <linux/init.h> 70 #include <linux/blk-mq.h> 71 #include <linux/major.h> 72 #include <linux/mutex.h> 73 #include <linux/completion.h> 74 #include <linux/wait.h> 75 76 #include <asm/atariints.h> 77 #include <asm/atari_stdma.h> 78 #include <asm/atari_stram.h> 79 80 #define FD_MAX_UNITS 2 81 82 #undef DEBUG 83 84 static DEFINE_MUTEX(ataflop_mutex); 85 static struct request *fd_request; 86 87 /* 88 * WD1772 stuff 89 */ 90 91 /* register codes */ 92 93 #define FDCSELREG_STP (0x80) /* command/status register */ 94 #define FDCSELREG_TRA (0x82) /* track register */ 95 #define FDCSELREG_SEC (0x84) /* sector register */ 96 #define FDCSELREG_DTA (0x86) /* data register */ 97 98 /* register names for FDC_READ/WRITE macros */ 99 100 #define FDCREG_CMD 0 101 #define FDCREG_STATUS 0 102 #define FDCREG_TRACK 2 103 #define FDCREG_SECTOR 4 104 #define FDCREG_DATA 6 105 106 /* command opcodes */ 107 108 #define FDCCMD_RESTORE (0x00) /* - */ 109 #define FDCCMD_SEEK (0x10) /* | */ 110 #define FDCCMD_STEP (0x20) /* | TYP 1 Commands */ 111 #define FDCCMD_STIN (0x40) /* | */ 112 #define FDCCMD_STOT (0x60) /* - */ 113 #define FDCCMD_RDSEC (0x80) /* - TYP 2 Commands */ 114 #define FDCCMD_WRSEC (0xa0) /* - " */ 115 #define FDCCMD_RDADR (0xc0) /* - */ 116 #define FDCCMD_RDTRA (0xe0) /* | TYP 3 Commands */ 117 #define FDCCMD_WRTRA (0xf0) /* - */ 118 #define FDCCMD_FORCI (0xd0) /* - TYP 4 Command */ 119 120 /* command modifier bits */ 121 122 #define FDCCMDADD_SR6 (0x00) /* step rate settings */ 123 #define FDCCMDADD_SR12 (0x01) 124 #define FDCCMDADD_SR2 (0x02) 125 #define FDCCMDADD_SR3 (0x03) 126 #define FDCCMDADD_V (0x04) /* verify */ 127 #define FDCCMDADD_H (0x08) /* wait for spin-up */ 128 #define FDCCMDADD_U (0x10) /* update track register */ 129 #define FDCCMDADD_M (0x10) /* multiple sector access */ 130 #define FDCCMDADD_E (0x04) /* head settling flag */ 131 #define FDCCMDADD_P (0x02) /* precompensation off */ 132 #define FDCCMDADD_A0 (0x01) /* DAM flag */ 133 134 /* status register bits */ 135 136 #define FDCSTAT_MOTORON (0x80) /* motor on */ 137 #define FDCSTAT_WPROT (0x40) /* write protected (FDCCMD_WR*) */ 138 #define FDCSTAT_SPINUP (0x20) /* motor speed stable (Type I) */ 139 #define FDCSTAT_DELDAM (0x20) /* sector has deleted DAM (Type II+III) */ 140 #define FDCSTAT_RECNF (0x10) /* record not found */ 141 #define FDCSTAT_CRC (0x08) /* CRC error */ 142 #define FDCSTAT_TR00 (0x04) /* Track 00 flag (Type I) */ 143 #define FDCSTAT_LOST (0x04) /* Lost Data (Type II+III) */ 144 #define FDCSTAT_IDX (0x02) /* Index status (Type I) */ 145 #define FDCSTAT_DRQ (0x02) /* DRQ status (Type II+III) */ 146 #define FDCSTAT_BUSY (0x01) /* FDC is busy */ 147 148 149 /* PSG Port A Bit Nr 0 .. Side Sel .. 0 -> Side 1 1 -> Side 2 */ 150 #define DSKSIDE (0x01) 151 152 #define DSKDRVNONE (0x06) 153 #define DSKDRV0 (0x02) 154 #define DSKDRV1 (0x04) 155 156 /* step rates */ 157 #define FDCSTEP_6 0x00 158 #define FDCSTEP_12 0x01 159 #define FDCSTEP_2 0x02 160 #define FDCSTEP_3 0x03 161 162 struct atari_format_descr { 163 int track; /* to be formatted */ 164 int head; /* "" "" */ 165 int sect_offset; /* offset of first sector */ 166 }; 167 168 /* Disk types: DD, HD, ED */ 169 static struct atari_disk_type { 170 const char *name; 171 unsigned spt; /* sectors per track */ 172 unsigned blocks; /* total number of blocks */ 173 unsigned fdc_speed; /* fdc_speed setting */ 174 unsigned stretch; /* track doubling ? */ 175 } atari_disk_type[] = { 176 { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ 177 { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ 178 { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ 179 { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ 180 /* formats above are probed for type DD */ 181 #define MAX_TYPE_DD 3 182 { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ 183 { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ 184 { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ 185 /* formats above are probed for types DD and HD */ 186 #define MAX_TYPE_HD 6 187 { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ 188 { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ 189 /* formats above are probed for types DD, HD and ED */ 190 #define MAX_TYPE_ED 8 191 /* types below are never autoprobed */ 192 { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ 193 { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ 194 { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ 195 { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ 196 { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ 197 { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ 198 { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ 199 { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ 200 { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ 201 { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ 202 { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ 203 { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ 204 { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ 205 { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ 206 { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ 207 { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ 208 { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ 209 { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ 210 { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ 211 }; 212 213 static int StartDiskType[] = { 214 MAX_TYPE_DD, 215 MAX_TYPE_HD, 216 MAX_TYPE_ED 217 }; 218 219 #define TYPE_DD 0 220 #define TYPE_HD 1 221 #define TYPE_ED 2 222 223 static int DriveType = TYPE_HD; 224 225 static DEFINE_SPINLOCK(ataflop_lock); 226 227 /* Array for translating minors into disk formats */ 228 static struct { 229 int index; 230 unsigned drive_types; 231 } minor2disktype[] = { 232 { 0, TYPE_DD }, /* 1: d360 */ 233 { 4, TYPE_HD }, /* 2: h1200 */ 234 { 1, TYPE_DD }, /* 3: D360 */ 235 { 2, TYPE_DD }, /* 4: D720 */ 236 { 1, TYPE_DD }, /* 5: h360 = D360 */ 237 { 2, TYPE_DD }, /* 6: h720 = D720 */ 238 { 5, TYPE_HD }, /* 7: H1440 */ 239 { 7, TYPE_ED }, /* 8: E2880 */ 240 /* some PC formats :-) */ 241 { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ 242 { 5, TYPE_HD }, /* 10: h1440 = H1440 */ 243 { 9, TYPE_HD }, /* 11: H1680 */ 244 { 10, TYPE_DD }, /* 12: h410 */ 245 { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ 246 { 11, TYPE_HD }, /* 14: h1476 */ 247 { 12, TYPE_HD }, /* 15: H1722 */ 248 { 13, TYPE_DD }, /* 16: h420 */ 249 { 14, TYPE_DD }, /* 17: H830 */ 250 { 15, TYPE_HD }, /* 18: h1494 */ 251 { 16, TYPE_HD }, /* 19: H1743 */ 252 { 17, TYPE_DD }, /* 20: h880 */ 253 { 18, TYPE_DD }, /* 21: D1040 */ 254 { 19, TYPE_DD }, /* 22: D1120 */ 255 { 20, TYPE_HD }, /* 23: h1600 */ 256 { 21, TYPE_HD }, /* 24: H1760 */ 257 { 22, TYPE_HD }, /* 25: H1920 */ 258 { 23, TYPE_ED }, /* 26: E3200 */ 259 { 24, TYPE_ED }, /* 27: E3520 */ 260 { 25, TYPE_ED }, /* 28: E3840 */ 261 { 26, TYPE_HD }, /* 29: H1840 */ 262 { 27, TYPE_DD }, /* 30: D800 */ 263 { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ 264 }; 265 266 #define NUM_DISK_MINORS ARRAY_SIZE(minor2disktype) 267 268 /* 269 * Maximum disk size (in kilobytes). This default is used whenever the 270 * current disk size is unknown. 271 */ 272 #define MAX_DISK_SIZE 3280 273 274 /* 275 * MSch: User-provided type information. 'drive' points to 276 * the respective entry of this array. Set by FDSETPRM ioctls. 277 */ 278 static struct atari_disk_type user_params[FD_MAX_UNITS]; 279 280 /* 281 * User-provided permanent type information. 'drive' points to 282 * the respective entry of this array. Set by FDDEFPRM ioctls, 283 * restored upon disk change by floppy_revalidate() if valid (as seen by 284 * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) 285 */ 286 static struct atari_disk_type default_params[FD_MAX_UNITS]; 287 288 /* current info on each unit */ 289 static struct atari_floppy_struct { 290 int connected; /* !=0 : drive is connected */ 291 int autoprobe; /* !=0 : do autoprobe */ 292 293 struct atari_disk_type *disktype; /* current type of disk */ 294 295 int track; /* current head position or -1 if 296 unknown */ 297 unsigned int steprate; /* steprate setting */ 298 unsigned int wpstat; /* current state of WP signal (for 299 disk change detection) */ 300 int flags; /* flags */ 301 struct gendisk *disk[NUM_DISK_MINORS]; 302 bool registered[NUM_DISK_MINORS]; 303 int ref; 304 int type; 305 struct blk_mq_tag_set tag_set; 306 } unit[FD_MAX_UNITS]; 307 308 #define UD unit[drive] 309 #define UDT unit[drive].disktype 310 #define SUD unit[SelectedDrive] 311 #define SUDT unit[SelectedDrive].disktype 312 313 314 #define FDC_READ(reg) ({ \ 315 /* unsigned long __flags; */ \ 316 unsigned short __val; \ 317 /* local_irq_save(__flags); */ \ 318 dma_wd.dma_mode_status = 0x80 | (reg); \ 319 udelay(25); \ 320 __val = dma_wd.fdc_acces_seccount; \ 321 MFPDELAY(); \ 322 /* local_irq_restore(__flags); */ \ 323 __val & 0xff; \ 324 }) 325 326 #define FDC_WRITE(reg,val) \ 327 do { \ 328 /* unsigned long __flags; */ \ 329 /* local_irq_save(__flags); */ \ 330 dma_wd.dma_mode_status = 0x80 | (reg); \ 331 udelay(25); \ 332 dma_wd.fdc_acces_seccount = (val); \ 333 MFPDELAY(); \ 334 /* local_irq_restore(__flags); */ \ 335 } while(0) 336 337 338 /* Buffering variables: 339 * First, there is a DMA buffer in ST-RAM that is used for floppy DMA 340 * operations. Second, a track buffer is used to cache a whole track 341 * of the disk to save read operations. These are two separate buffers 342 * because that allows write operations without clearing the track buffer. 343 */ 344 345 static int MaxSectors[] = { 346 11, 22, 44 347 }; 348 static int BufferSize[] = { 349 15*512, 30*512, 60*512 350 }; 351 352 #define BUFFER_SIZE (BufferSize[DriveType]) 353 354 unsigned char *DMABuffer; /* buffer for writes */ 355 static unsigned long PhysDMABuffer; /* physical address */ 356 357 static int UseTrackbuffer = -1; /* Do track buffering? */ 358 module_param(UseTrackbuffer, int, 0); 359 360 unsigned char *TrackBuffer; /* buffer for reads */ 361 static unsigned long PhysTrackBuffer; /* physical address */ 362 static int BufferDrive, BufferSide, BufferTrack; 363 static int read_track; /* non-zero if we are reading whole tracks */ 364 365 #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) 366 #define IS_BUFFERED(drive,side,track) \ 367 (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) 368 369 /* 370 * These are global variables, as that's the easiest way to give 371 * information to interrupts. They are the data used for the current 372 * request. 373 */ 374 static int SelectedDrive = 0; 375 static int ReqCmd, ReqBlock; 376 static int ReqSide, ReqTrack, ReqSector, ReqCnt; 377 static int HeadSettleFlag = 0; 378 static unsigned char *ReqData, *ReqBuffer; 379 static int MotorOn = 0, MotorOffTrys; 380 static int IsFormatting = 0, FormatError; 381 382 static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; 383 module_param_array(UserSteprate, int, NULL, 0); 384 385 static DECLARE_COMPLETION(format_wait); 386 387 static unsigned long changed_floppies = 0xff, fake_change = 0; 388 #define CHECK_CHANGE_DELAY HZ/2 389 390 #define FD_MOTOR_OFF_DELAY (3*HZ) 391 #define FD_MOTOR_OFF_MAXTRY (10*20) 392 393 #define FLOPPY_TIMEOUT (6*HZ) 394 #define RECALIBRATE_ERRORS 4 /* After this many errors the drive 395 * will be recalibrated. */ 396 #define MAX_ERRORS 8 /* After this many errors the driver 397 * will give up. */ 398 399 400 /* 401 * The driver is trying to determine the correct media format 402 * while Probing is set. fd_rwsec_done() clears it after a 403 * successful access. 404 */ 405 static int Probing = 0; 406 407 /* This flag is set when a dummy seek is necessary to make the WP 408 * status bit accessible. 409 */ 410 static int NeedSeek = 0; 411 412 413 #ifdef DEBUG 414 #define DPRINT(a) printk a 415 #else 416 #define DPRINT(a) 417 #endif 418 419 /***************************** Prototypes *****************************/ 420 421 static void fd_select_side( int side ); 422 static void fd_select_drive( int drive ); 423 static void fd_deselect( void ); 424 static void fd_motor_off_timer(struct timer_list *unused); 425 static void check_change(struct timer_list *unused); 426 static irqreturn_t floppy_irq (int irq, void *dummy); 427 static void fd_error( void ); 428 static int do_format(int drive, int type, struct atari_format_descr *desc); 429 static void do_fd_action( int drive ); 430 static void fd_calibrate( void ); 431 static void fd_calibrate_done( int status ); 432 static void fd_seek( void ); 433 static void fd_seek_done( int status ); 434 static void fd_rwsec( void ); 435 static void fd_readtrack_check(struct timer_list *unused); 436 static void fd_rwsec_done( int status ); 437 static void fd_rwsec_done1(int status); 438 static void fd_writetrack( void ); 439 static void fd_writetrack_done( int status ); 440 static void fd_times_out(struct timer_list *unused); 441 static void finish_fdc( void ); 442 static void finish_fdc_done( int dummy ); 443 static void setup_req_params( int drive ); 444 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int 445 cmd, unsigned long param); 446 static void fd_probe( int drive ); 447 static int fd_test_drive_present( int drive ); 448 static void config_types( void ); 449 static int floppy_open(struct block_device *bdev, fmode_t mode); 450 static void floppy_release(struct gendisk *disk, fmode_t mode); 451 452 /************************* End of Prototypes **************************/ 453 454 static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer); 455 static DEFINE_TIMER(readtrack_timer, fd_readtrack_check); 456 static DEFINE_TIMER(timeout_timer, fd_times_out); 457 static DEFINE_TIMER(fd_timer, check_change); 458 459 static void fd_end_request_cur(blk_status_t err) 460 { 461 DPRINT(("fd_end_request_cur(), bytes %d of %d\n", 462 blk_rq_cur_bytes(fd_request), 463 blk_rq_bytes(fd_request))); 464 465 if (!blk_update_request(fd_request, err, 466 blk_rq_cur_bytes(fd_request))) { 467 DPRINT(("calling __blk_mq_end_request()\n")); 468 __blk_mq_end_request(fd_request, err); 469 fd_request = NULL; 470 } else { 471 /* requeue rest of request */ 472 DPRINT(("calling blk_mq_requeue_request()\n")); 473 blk_mq_requeue_request(fd_request, true); 474 fd_request = NULL; 475 } 476 } 477 478 static inline void start_motor_off_timer(void) 479 { 480 mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); 481 MotorOffTrys = 0; 482 } 483 484 static inline void start_check_change_timer( void ) 485 { 486 mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); 487 } 488 489 static inline void start_timeout(void) 490 { 491 mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); 492 } 493 494 static inline void stop_timeout(void) 495 { 496 del_timer(&timeout_timer); 497 } 498 499 /* Select the side to use. */ 500 501 static void fd_select_side( int side ) 502 { 503 unsigned long flags; 504 505 /* protect against various other ints mucking around with the PSG */ 506 local_irq_save(flags); 507 508 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 509 sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : 510 sound_ym.rd_data_reg_sel & 0xfe; 511 512 local_irq_restore(flags); 513 } 514 515 516 /* Select a drive, update the FDC's track register and set the correct 517 * clock speed for this disk's type. 518 */ 519 520 static void fd_select_drive( int drive ) 521 { 522 unsigned long flags; 523 unsigned char tmp; 524 525 if (drive == SelectedDrive) 526 return; 527 528 /* protect against various other ints mucking around with the PSG */ 529 local_irq_save(flags); 530 sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ 531 tmp = sound_ym.rd_data_reg_sel; 532 sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); 533 atari_dont_touch_floppy_select = 1; 534 local_irq_restore(flags); 535 536 /* restore track register to saved value */ 537 FDC_WRITE( FDCREG_TRACK, UD.track ); 538 udelay(25); 539 540 /* select 8/16 MHz */ 541 if (UDT) 542 if (ATARIHW_PRESENT(FDCSPEED)) 543 dma_wd.fdc_speed = UDT->fdc_speed; 544 545 SelectedDrive = drive; 546 } 547 548 549 /* Deselect both drives. */ 550 551 static void fd_deselect( void ) 552 { 553 unsigned long flags; 554 555 /* protect against various other ints mucking around with the PSG */ 556 local_irq_save(flags); 557 atari_dont_touch_floppy_select = 0; 558 sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ 559 sound_ym.wd_data = (sound_ym.rd_data_reg_sel | 560 (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ 561 /* On Falcon, the drive B select line is used on the printer port, so 562 * leave it alone... */ 563 SelectedDrive = -1; 564 local_irq_restore(flags); 565 } 566 567 568 /* This timer function deselects the drives when the FDC switched the 569 * motor off. The deselection cannot happen earlier because the FDC 570 * counts the index signals, which arrive only if one drive is selected. 571 */ 572 573 static void fd_motor_off_timer(struct timer_list *unused) 574 { 575 unsigned char status; 576 577 if (SelectedDrive < 0) 578 /* no drive selected, needn't deselect anyone */ 579 return; 580 581 if (stdma_islocked()) 582 goto retry; 583 584 status = FDC_READ( FDCREG_STATUS ); 585 586 if (!(status & 0x80)) { 587 /* motor already turned off by FDC -> deselect drives */ 588 MotorOn = 0; 589 fd_deselect(); 590 return; 591 } 592 /* not yet off, try again */ 593 594 retry: 595 /* Test again later; if tested too often, it seems there is no disk 596 * in the drive and the FDC will leave the motor on forever (or, 597 * at least until a disk is inserted). So we'll test only twice 598 * per second from then on... 599 */ 600 mod_timer(&motor_off_timer, 601 jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); 602 } 603 604 605 /* This function is repeatedly called to detect disk changes (as good 606 * as possible) and keep track of the current state of the write protection. 607 */ 608 609 static void check_change(struct timer_list *unused) 610 { 611 static int drive = 0; 612 613 unsigned long flags; 614 unsigned char old_porta; 615 int stat; 616 617 if (++drive > 1 || !UD.connected) 618 drive = 0; 619 620 /* protect against various other ints mucking around with the PSG */ 621 local_irq_save(flags); 622 623 if (!stdma_islocked()) { 624 sound_ym.rd_data_reg_sel = 14; 625 old_porta = sound_ym.rd_data_reg_sel; 626 sound_ym.wd_data = (old_porta | DSKDRVNONE) & 627 ~(drive == 0 ? DSKDRV0 : DSKDRV1); 628 stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); 629 sound_ym.wd_data = old_porta; 630 631 if (stat != UD.wpstat) { 632 DPRINT(( "wpstat[%d] = %d\n", drive, stat )); 633 UD.wpstat = stat; 634 set_bit (drive, &changed_floppies); 635 } 636 } 637 local_irq_restore(flags); 638 639 start_check_change_timer(); 640 } 641 642 643 /* Handling of the Head Settling Flag: This flag should be set after each 644 * seek operation, because we don't use seeks with verify. 645 */ 646 647 static inline void set_head_settle_flag(void) 648 { 649 HeadSettleFlag = FDCCMDADD_E; 650 } 651 652 static inline int get_head_settle_flag(void) 653 { 654 int tmp = HeadSettleFlag; 655 HeadSettleFlag = 0; 656 return( tmp ); 657 } 658 659 static inline void copy_buffer(void *from, void *to) 660 { 661 ulong *p1 = (ulong *)from, *p2 = (ulong *)to; 662 int cnt; 663 664 for (cnt = 512/4; cnt; cnt--) 665 *p2++ = *p1++; 666 } 667 668 /* General Interrupt Handling */ 669 670 static void (*FloppyIRQHandler)( int status ) = NULL; 671 672 static irqreturn_t floppy_irq (int irq, void *dummy) 673 { 674 unsigned char status; 675 void (*handler)( int ); 676 677 handler = xchg(&FloppyIRQHandler, NULL); 678 679 if (handler) { 680 nop(); 681 status = FDC_READ( FDCREG_STATUS ); 682 DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); 683 handler( status ); 684 } 685 else { 686 DPRINT(("FDC irq, no handler\n")); 687 } 688 return IRQ_HANDLED; 689 } 690 691 692 /* Error handling: If some error happened, retry some times, then 693 * recalibrate, then try again, and fail after MAX_ERRORS. 694 */ 695 696 static void fd_error( void ) 697 { 698 if (IsFormatting) { 699 IsFormatting = 0; 700 FormatError = 1; 701 complete(&format_wait); 702 return; 703 } 704 705 if (!fd_request) 706 return; 707 708 fd_request->error_count++; 709 if (fd_request->error_count >= MAX_ERRORS) { 710 printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); 711 fd_end_request_cur(BLK_STS_IOERR); 712 finish_fdc(); 713 return; 714 } 715 else if (fd_request->error_count == RECALIBRATE_ERRORS) { 716 printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); 717 if (SelectedDrive != -1) 718 SUD.track = -1; 719 } 720 /* need to re-run request to recalibrate */ 721 atari_disable_irq( IRQ_MFP_FDC ); 722 723 setup_req_params( SelectedDrive ); 724 do_fd_action( SelectedDrive ); 725 726 atari_enable_irq( IRQ_MFP_FDC ); 727 } 728 729 730 731 #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) 732 733 734 /* ---------- Formatting ---------- */ 735 736 #define FILL(n,val) \ 737 do { \ 738 memset( p, val, n ); \ 739 p += n; \ 740 } while(0) 741 742 static int do_format(int drive, int type, struct atari_format_descr *desc) 743 { 744 struct request_queue *q; 745 unsigned char *p; 746 int sect, nsect; 747 unsigned long flags; 748 int ret; 749 750 if (type) { 751 type--; 752 if (type >= NUM_DISK_MINORS || 753 minor2disktype[type].drive_types > DriveType) { 754 finish_fdc(); 755 return -EINVAL; 756 } 757 } 758 759 q = unit[drive].disk[type]->queue; 760 blk_mq_freeze_queue(q); 761 blk_mq_quiesce_queue(q); 762 763 local_irq_save(flags); 764 stdma_lock(floppy_irq, NULL); 765 atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ 766 local_irq_restore(flags); 767 768 if (type) { 769 type = minor2disktype[type].index; 770 UDT = &atari_disk_type[type]; 771 } 772 773 if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { 774 finish_fdc(); 775 ret = -EINVAL; 776 goto out; 777 } 778 779 nsect = UDT->spt; 780 p = TrackBuffer; 781 /* The track buffer is used for the raw track data, so its 782 contents become invalid! */ 783 BufferDrive = -1; 784 /* stop deselect timer */ 785 del_timer( &motor_off_timer ); 786 787 FILL( 60 * (nsect / 9), 0x4e ); 788 for( sect = 0; sect < nsect; ++sect ) { 789 FILL( 12, 0 ); 790 FILL( 3, 0xf5 ); 791 *p++ = 0xfe; 792 *p++ = desc->track; 793 *p++ = desc->head; 794 *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; 795 *p++ = 2; 796 *p++ = 0xf7; 797 FILL( 22, 0x4e ); 798 FILL( 12, 0 ); 799 FILL( 3, 0xf5 ); 800 *p++ = 0xfb; 801 FILL( 512, 0xe5 ); 802 *p++ = 0xf7; 803 FILL( 40, 0x4e ); 804 } 805 FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); 806 807 IsFormatting = 1; 808 FormatError = 0; 809 ReqTrack = desc->track; 810 ReqSide = desc->head; 811 do_fd_action( drive ); 812 813 wait_for_completion(&format_wait); 814 815 finish_fdc(); 816 ret = FormatError ? -EIO : 0; 817 out: 818 blk_mq_unquiesce_queue(q); 819 blk_mq_unfreeze_queue(q); 820 return ret; 821 } 822 823 824 /* do_fd_action() is the general procedure for a fd request: All 825 * required parameter settings (drive select, side select, track 826 * position) are checked and set if needed. For each of these 827 * parameters and the actual reading or writing exist two functions: 828 * one that starts the setting (or skips it if possible) and one 829 * callback for the "done" interrupt. Each done func calls the next 830 * set function to propagate the request down to fd_rwsec_done(). 831 */ 832 833 static void do_fd_action( int drive ) 834 { 835 DPRINT(("do_fd_action\n")); 836 837 if (UseTrackbuffer && !IsFormatting) { 838 repeat: 839 if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { 840 if (ReqCmd == READ) { 841 copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); 842 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 843 /* read next sector */ 844 setup_req_params( drive ); 845 goto repeat; 846 } 847 else { 848 /* all sectors finished */ 849 fd_end_request_cur(BLK_STS_OK); 850 finish_fdc(); 851 return; 852 } 853 } 854 else { 855 /* cmd == WRITE, pay attention to track buffer 856 * consistency! */ 857 copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); 858 } 859 } 860 } 861 862 if (SelectedDrive != drive) 863 fd_select_drive( drive ); 864 865 if (UD.track == -1) 866 fd_calibrate(); 867 else if (UD.track != ReqTrack << UDT->stretch) 868 fd_seek(); 869 else if (IsFormatting) 870 fd_writetrack(); 871 else 872 fd_rwsec(); 873 } 874 875 876 /* Seek to track 0 if the current track is unknown */ 877 878 static void fd_calibrate( void ) 879 { 880 if (SUD.track >= 0) { 881 fd_calibrate_done( 0 ); 882 return; 883 } 884 885 if (ATARIHW_PRESENT(FDCSPEED)) 886 dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */ 887 DPRINT(("fd_calibrate\n")); 888 SET_IRQ_HANDLER( fd_calibrate_done ); 889 /* we can't verify, since the speed may be incorrect */ 890 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); 891 892 NeedSeek = 1; 893 MotorOn = 1; 894 start_timeout(); 895 /* wait for IRQ */ 896 } 897 898 899 static void fd_calibrate_done( int status ) 900 { 901 DPRINT(("fd_calibrate_done()\n")); 902 stop_timeout(); 903 904 /* set the correct speed now */ 905 if (ATARIHW_PRESENT(FDCSPEED)) 906 dma_wd.fdc_speed = SUDT->fdc_speed; 907 if (status & FDCSTAT_RECNF) { 908 printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); 909 fd_error(); 910 } 911 else { 912 SUD.track = 0; 913 fd_seek(); 914 } 915 } 916 917 918 /* Seek the drive to the requested track. The drive must have been 919 * calibrated at some point before this. 920 */ 921 922 static void fd_seek( void ) 923 { 924 if (SUD.track == ReqTrack << SUDT->stretch) { 925 fd_seek_done( 0 ); 926 return; 927 } 928 929 if (ATARIHW_PRESENT(FDCSPEED)) { 930 dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ 931 MFPDELAY(); 932 } 933 934 DPRINT(("fd_seek() to track %d\n",ReqTrack)); 935 FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); 936 udelay(25); 937 SET_IRQ_HANDLER( fd_seek_done ); 938 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); 939 940 MotorOn = 1; 941 set_head_settle_flag(); 942 start_timeout(); 943 /* wait for IRQ */ 944 } 945 946 947 static void fd_seek_done( int status ) 948 { 949 DPRINT(("fd_seek_done()\n")); 950 stop_timeout(); 951 952 /* set the correct speed */ 953 if (ATARIHW_PRESENT(FDCSPEED)) 954 dma_wd.fdc_speed = SUDT->fdc_speed; 955 if (status & FDCSTAT_RECNF) { 956 printk(KERN_ERR "fd%d: seek error (to track %d)\n", 957 SelectedDrive, ReqTrack ); 958 /* we don't know exactly which track we are on now! */ 959 SUD.track = -1; 960 fd_error(); 961 } 962 else { 963 SUD.track = ReqTrack << SUDT->stretch; 964 NeedSeek = 0; 965 if (IsFormatting) 966 fd_writetrack(); 967 else 968 fd_rwsec(); 969 } 970 } 971 972 973 /* This does the actual reading/writing after positioning the head 974 * over the correct track. 975 */ 976 977 static int MultReadInProgress = 0; 978 979 980 static void fd_rwsec( void ) 981 { 982 unsigned long paddr, flags; 983 unsigned int rwflag, old_motoron; 984 unsigned int track; 985 986 DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); 987 if (ReqCmd == WRITE) { 988 if (ATARIHW_PRESENT(EXTD_DMA)) { 989 paddr = virt_to_phys(ReqData); 990 } 991 else { 992 copy_buffer( ReqData, DMABuffer ); 993 paddr = PhysDMABuffer; 994 } 995 dma_cache_maintenance( paddr, 512, 1 ); 996 rwflag = 0x100; 997 } 998 else { 999 if (read_track) 1000 paddr = PhysTrackBuffer; 1001 else 1002 paddr = ATARIHW_PRESENT(EXTD_DMA) ? 1003 virt_to_phys(ReqData) : PhysDMABuffer; 1004 rwflag = 0; 1005 } 1006 1007 fd_select_side( ReqSide ); 1008 1009 /* Start sector of this operation */ 1010 FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); 1011 MFPDELAY(); 1012 /* Cheat for track if stretch != 0 */ 1013 if (SUDT->stretch) { 1014 track = FDC_READ( FDCREG_TRACK); 1015 MFPDELAY(); 1016 FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); 1017 } 1018 udelay(25); 1019 1020 /* Setup DMA */ 1021 local_irq_save(flags); 1022 dma_wd.dma_lo = (unsigned char)paddr; 1023 MFPDELAY(); 1024 paddr >>= 8; 1025 dma_wd.dma_md = (unsigned char)paddr; 1026 MFPDELAY(); 1027 paddr >>= 8; 1028 if (ATARIHW_PRESENT(EXTD_DMA)) 1029 st_dma_ext_dmahi = (unsigned short)paddr; 1030 else 1031 dma_wd.dma_hi = (unsigned char)paddr; 1032 MFPDELAY(); 1033 local_irq_restore(flags); 1034 1035 /* Clear FIFO and switch DMA to correct mode */ 1036 dma_wd.dma_mode_status = 0x90 | rwflag; 1037 MFPDELAY(); 1038 dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); 1039 MFPDELAY(); 1040 dma_wd.dma_mode_status = 0x90 | rwflag; 1041 MFPDELAY(); 1042 1043 /* How many sectors for DMA */ 1044 dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; 1045 1046 udelay(25); 1047 1048 /* Start operation */ 1049 dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; 1050 udelay(25); 1051 SET_IRQ_HANDLER( fd_rwsec_done ); 1052 dma_wd.fdc_acces_seccount = 1053 (get_head_settle_flag() | 1054 (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); 1055 1056 old_motoron = MotorOn; 1057 MotorOn = 1; 1058 NeedSeek = 1; 1059 /* wait for interrupt */ 1060 1061 if (read_track) { 1062 /* If reading a whole track, wait about one disk rotation and 1063 * then check if all sectors are read. The FDC will even 1064 * search for the first non-existent sector and need 1 sec to 1065 * recognise that it isn't present :-( 1066 */ 1067 MultReadInProgress = 1; 1068 mod_timer(&readtrack_timer, 1069 /* 1 rot. + 5 rot.s if motor was off */ 1070 jiffies + HZ/5 + (old_motoron ? 0 : HZ)); 1071 } 1072 start_timeout(); 1073 } 1074 1075 1076 static void fd_readtrack_check(struct timer_list *unused) 1077 { 1078 unsigned long flags, addr, addr2; 1079 1080 local_irq_save(flags); 1081 1082 if (!MultReadInProgress) { 1083 /* This prevents a race condition that could arise if the 1084 * interrupt is triggered while the calling of this timer 1085 * callback function takes place. The IRQ function then has 1086 * already cleared 'MultReadInProgress' when flow of control 1087 * gets here. 1088 */ 1089 local_irq_restore(flags); 1090 return; 1091 } 1092 1093 /* get the current DMA address */ 1094 /* ++ f.a. read twice to avoid being fooled by switcher */ 1095 addr = 0; 1096 do { 1097 addr2 = addr; 1098 addr = dma_wd.dma_lo & 0xff; 1099 MFPDELAY(); 1100 addr |= (dma_wd.dma_md & 0xff) << 8; 1101 MFPDELAY(); 1102 if (ATARIHW_PRESENT( EXTD_DMA )) 1103 addr |= (st_dma_ext_dmahi & 0xffff) << 16; 1104 else 1105 addr |= (dma_wd.dma_hi & 0xff) << 16; 1106 MFPDELAY(); 1107 } while(addr != addr2); 1108 1109 if (addr >= PhysTrackBuffer + SUDT->spt*512) { 1110 /* already read enough data, force an FDC interrupt to stop 1111 * the read operation 1112 */ 1113 SET_IRQ_HANDLER( NULL ); 1114 MultReadInProgress = 0; 1115 local_irq_restore(flags); 1116 DPRINT(("fd_readtrack_check(): done\n")); 1117 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1118 udelay(25); 1119 1120 /* No error until now -- the FDC would have interrupted 1121 * otherwise! 1122 */ 1123 fd_rwsec_done1(0); 1124 } 1125 else { 1126 /* not yet finished, wait another tenth rotation */ 1127 local_irq_restore(flags); 1128 DPRINT(("fd_readtrack_check(): not yet finished\n")); 1129 mod_timer(&readtrack_timer, jiffies + HZ/5/10); 1130 } 1131 } 1132 1133 1134 static void fd_rwsec_done( int status ) 1135 { 1136 DPRINT(("fd_rwsec_done()\n")); 1137 1138 if (read_track) { 1139 del_timer(&readtrack_timer); 1140 if (!MultReadInProgress) 1141 return; 1142 MultReadInProgress = 0; 1143 } 1144 fd_rwsec_done1(status); 1145 } 1146 1147 static void fd_rwsec_done1(int status) 1148 { 1149 unsigned int track; 1150 1151 stop_timeout(); 1152 1153 /* Correct the track if stretch != 0 */ 1154 if (SUDT->stretch) { 1155 track = FDC_READ( FDCREG_TRACK); 1156 MFPDELAY(); 1157 FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); 1158 } 1159 1160 if (!UseTrackbuffer) { 1161 dma_wd.dma_mode_status = 0x90; 1162 MFPDELAY(); 1163 if (!(dma_wd.dma_mode_status & 0x01)) { 1164 printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); 1165 goto err_end; 1166 } 1167 } 1168 MFPDELAY(); 1169 1170 if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { 1171 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1172 goto err_end; 1173 } 1174 if ((status & FDCSTAT_RECNF) && 1175 /* RECNF is no error after a multiple read when the FDC 1176 searched for a non-existent sector! */ 1177 !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { 1178 if (Probing) { 1179 if (SUDT > atari_disk_type) { 1180 if (SUDT[-1].blocks > ReqBlock) { 1181 /* try another disk type */ 1182 SUDT--; 1183 set_capacity(unit[SelectedDrive].disk[0], 1184 SUDT->blocks); 1185 } else 1186 Probing = 0; 1187 } 1188 else { 1189 if (SUD.flags & FTD_MSG) 1190 printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", 1191 SelectedDrive, SUDT->name ); 1192 Probing=0; 1193 } 1194 } else { 1195 /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ 1196 if (SUD.autoprobe) { 1197 SUDT = atari_disk_type + StartDiskType[DriveType]; 1198 set_capacity(unit[SelectedDrive].disk[0], 1199 SUDT->blocks); 1200 Probing = 1; 1201 } 1202 } 1203 if (Probing) { 1204 if (ATARIHW_PRESENT(FDCSPEED)) { 1205 dma_wd.fdc_speed = SUDT->fdc_speed; 1206 MFPDELAY(); 1207 } 1208 setup_req_params( SelectedDrive ); 1209 BufferDrive = -1; 1210 do_fd_action( SelectedDrive ); 1211 return; 1212 } 1213 1214 printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", 1215 SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); 1216 goto err_end; 1217 } 1218 if (status & FDCSTAT_CRC) { 1219 printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", 1220 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1221 goto err_end; 1222 } 1223 if (status & FDCSTAT_LOST) { 1224 printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", 1225 SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); 1226 goto err_end; 1227 } 1228 1229 Probing = 0; 1230 1231 if (ReqCmd == READ) { 1232 if (!read_track) { 1233 void *addr; 1234 addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; 1235 dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); 1236 if (!ATARIHW_PRESENT( EXTD_DMA )) 1237 copy_buffer (addr, ReqData); 1238 } else { 1239 dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); 1240 BufferDrive = SelectedDrive; 1241 BufferSide = ReqSide; 1242 BufferTrack = ReqTrack; 1243 copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); 1244 } 1245 } 1246 1247 if (++ReqCnt < blk_rq_cur_sectors(fd_request)) { 1248 /* read next sector */ 1249 setup_req_params( SelectedDrive ); 1250 do_fd_action( SelectedDrive ); 1251 } 1252 else { 1253 /* all sectors finished */ 1254 fd_end_request_cur(BLK_STS_OK); 1255 finish_fdc(); 1256 } 1257 return; 1258 1259 err_end: 1260 BufferDrive = -1; 1261 fd_error(); 1262 } 1263 1264 1265 static void fd_writetrack( void ) 1266 { 1267 unsigned long paddr, flags; 1268 unsigned int track; 1269 1270 DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); 1271 1272 paddr = PhysTrackBuffer; 1273 dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); 1274 1275 fd_select_side( ReqSide ); 1276 1277 /* Cheat for track if stretch != 0 */ 1278 if (SUDT->stretch) { 1279 track = FDC_READ( FDCREG_TRACK); 1280 MFPDELAY(); 1281 FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); 1282 } 1283 udelay(40); 1284 1285 /* Setup DMA */ 1286 local_irq_save(flags); 1287 dma_wd.dma_lo = (unsigned char)paddr; 1288 MFPDELAY(); 1289 paddr >>= 8; 1290 dma_wd.dma_md = (unsigned char)paddr; 1291 MFPDELAY(); 1292 paddr >>= 8; 1293 if (ATARIHW_PRESENT( EXTD_DMA )) 1294 st_dma_ext_dmahi = (unsigned short)paddr; 1295 else 1296 dma_wd.dma_hi = (unsigned char)paddr; 1297 MFPDELAY(); 1298 local_irq_restore(flags); 1299 1300 /* Clear FIFO and switch DMA to correct mode */ 1301 dma_wd.dma_mode_status = 0x190; 1302 MFPDELAY(); 1303 dma_wd.dma_mode_status = 0x90; 1304 MFPDELAY(); 1305 dma_wd.dma_mode_status = 0x190; 1306 MFPDELAY(); 1307 1308 /* How many sectors for DMA */ 1309 dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; 1310 udelay(40); 1311 1312 /* Start operation */ 1313 dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; 1314 udelay(40); 1315 SET_IRQ_HANDLER( fd_writetrack_done ); 1316 dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); 1317 1318 MotorOn = 1; 1319 start_timeout(); 1320 /* wait for interrupt */ 1321 } 1322 1323 1324 static void fd_writetrack_done( int status ) 1325 { 1326 DPRINT(("fd_writetrack_done()\n")); 1327 1328 stop_timeout(); 1329 1330 if (status & FDCSTAT_WPROT) { 1331 printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); 1332 goto err_end; 1333 } 1334 if (status & FDCSTAT_LOST) { 1335 printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", 1336 SelectedDrive, ReqSide, ReqTrack ); 1337 goto err_end; 1338 } 1339 1340 complete(&format_wait); 1341 return; 1342 1343 err_end: 1344 fd_error(); 1345 } 1346 1347 static void fd_times_out(struct timer_list *unused) 1348 { 1349 atari_disable_irq( IRQ_MFP_FDC ); 1350 if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but 1351 * before we came here... */ 1352 1353 SET_IRQ_HANDLER( NULL ); 1354 /* If the timeout occurred while the readtrack_check timer was 1355 * active, we need to cancel it, else bad things will happen */ 1356 if (UseTrackbuffer) 1357 del_timer( &readtrack_timer ); 1358 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1359 udelay( 25 ); 1360 1361 printk(KERN_ERR "floppy timeout\n" ); 1362 fd_error(); 1363 end: 1364 atari_enable_irq( IRQ_MFP_FDC ); 1365 } 1366 1367 1368 /* The (noop) seek operation here is needed to make the WP bit in the 1369 * FDC status register accessible for check_change. If the last disk 1370 * operation would have been a RDSEC, this bit would always read as 0 1371 * no matter what :-( To save time, the seek goes to the track we're 1372 * already on. 1373 */ 1374 1375 static void finish_fdc( void ) 1376 { 1377 if (!NeedSeek || !stdma_is_locked_by(floppy_irq)) { 1378 finish_fdc_done( 0 ); 1379 } 1380 else { 1381 DPRINT(("finish_fdc: dummy seek started\n")); 1382 FDC_WRITE (FDCREG_DATA, SUD.track); 1383 SET_IRQ_HANDLER( finish_fdc_done ); 1384 FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); 1385 MotorOn = 1; 1386 start_timeout(); 1387 /* we must wait for the IRQ here, because the ST-DMA 1388 is released immediately afterwards and the interrupt 1389 may be delivered to the wrong driver. */ 1390 } 1391 } 1392 1393 1394 static void finish_fdc_done( int dummy ) 1395 { 1396 unsigned long flags; 1397 1398 DPRINT(("finish_fdc_done entered\n")); 1399 stop_timeout(); 1400 NeedSeek = 0; 1401 1402 if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) 1403 /* If the check for a disk change is done too early after this 1404 * last seek command, the WP bit still reads wrong :-(( 1405 */ 1406 mod_timer(&fd_timer, jiffies + 5); 1407 else 1408 start_check_change_timer(); 1409 start_motor_off_timer(); 1410 1411 local_irq_save(flags); 1412 if (stdma_is_locked_by(floppy_irq)) 1413 stdma_release(); 1414 local_irq_restore(flags); 1415 1416 DPRINT(("finish_fdc() finished\n")); 1417 } 1418 1419 /* The detection of disk changes is a dark chapter in Atari history :-( 1420 * Because the "Drive ready" signal isn't present in the Atari 1421 * hardware, one has to rely on the "Write Protect". This works fine, 1422 * as long as no write protected disks are used. TOS solves this 1423 * problem by introducing tri-state logic ("maybe changed") and 1424 * looking at the serial number in block 0. This isn't possible for 1425 * Linux, since the floppy driver can't make assumptions about the 1426 * filesystem used on the disk and thus the contents of block 0. I've 1427 * chosen the method to always say "The disk was changed" if it is 1428 * unsure whether it was. This implies that every open or mount 1429 * invalidates the disk buffers if you work with write protected 1430 * disks. But at least this is better than working with incorrect data 1431 * due to unrecognised disk changes. 1432 */ 1433 1434 static unsigned int floppy_check_events(struct gendisk *disk, 1435 unsigned int clearing) 1436 { 1437 struct atari_floppy_struct *p = disk->private_data; 1438 unsigned int drive = p - unit; 1439 if (test_bit (drive, &fake_change)) { 1440 /* simulated change (e.g. after formatting) */ 1441 return DISK_EVENT_MEDIA_CHANGE; 1442 } 1443 if (test_bit (drive, &changed_floppies)) { 1444 /* surely changed (the WP signal changed at least once) */ 1445 return DISK_EVENT_MEDIA_CHANGE; 1446 } 1447 if (UD.wpstat) { 1448 /* WP is on -> could be changed: to be sure, buffers should be 1449 * invalidated... 1450 */ 1451 return DISK_EVENT_MEDIA_CHANGE; 1452 } 1453 1454 return 0; 1455 } 1456 1457 static int floppy_revalidate(struct gendisk *disk) 1458 { 1459 struct atari_floppy_struct *p = disk->private_data; 1460 unsigned int drive = p - unit; 1461 1462 if (test_bit(drive, &changed_floppies) || 1463 test_bit(drive, &fake_change) || !p->disktype) { 1464 if (UD.flags & FTD_MSG) 1465 printk(KERN_ERR "floppy: clear format %p!\n", UDT); 1466 BufferDrive = -1; 1467 clear_bit(drive, &fake_change); 1468 clear_bit(drive, &changed_floppies); 1469 /* MSch: clearing geometry makes sense only for autoprobe 1470 formats, for 'permanent user-defined' parameter: 1471 restore default_params[] here if flagged valid! */ 1472 if (default_params[drive].blocks == 0) 1473 UDT = NULL; 1474 else 1475 UDT = &default_params[drive]; 1476 } 1477 return 0; 1478 } 1479 1480 1481 /* This sets up the global variables describing the current request. */ 1482 1483 static void setup_req_params( int drive ) 1484 { 1485 int block = ReqBlock + ReqCnt; 1486 1487 ReqTrack = block / UDT->spt; 1488 ReqSector = block - ReqTrack * UDT->spt + 1; 1489 ReqSide = ReqTrack & 1; 1490 ReqTrack >>= 1; 1491 ReqData = ReqBuffer + 512 * ReqCnt; 1492 1493 if (UseTrackbuffer) 1494 read_track = (ReqCmd == READ && fd_request->error_count == 0); 1495 else 1496 read_track = 0; 1497 1498 DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, 1499 ReqTrack, ReqSector, (unsigned long)ReqData )); 1500 } 1501 1502 static blk_status_t ataflop_queue_rq(struct blk_mq_hw_ctx *hctx, 1503 const struct blk_mq_queue_data *bd) 1504 { 1505 struct atari_floppy_struct *floppy = bd->rq->rq_disk->private_data; 1506 int drive = floppy - unit; 1507 int type = floppy->type; 1508 1509 DPRINT(("Queue request: drive %d type %d sectors %d of %d last %d\n", 1510 drive, type, blk_rq_cur_sectors(bd->rq), 1511 blk_rq_sectors(bd->rq), bd->last)); 1512 1513 spin_lock_irq(&ataflop_lock); 1514 if (fd_request) { 1515 spin_unlock_irq(&ataflop_lock); 1516 return BLK_STS_DEV_RESOURCE; 1517 } 1518 if (!stdma_try_lock(floppy_irq, NULL)) { 1519 spin_unlock_irq(&ataflop_lock); 1520 return BLK_STS_RESOURCE; 1521 } 1522 fd_request = bd->rq; 1523 blk_mq_start_request(fd_request); 1524 1525 atari_disable_irq( IRQ_MFP_FDC ); 1526 1527 IsFormatting = 0; 1528 1529 if (!UD.connected) { 1530 /* drive not connected */ 1531 printk(KERN_ERR "Unknown Device: fd%d\n", drive ); 1532 fd_end_request_cur(BLK_STS_IOERR); 1533 stdma_release(); 1534 goto out; 1535 } 1536 1537 if (type == 0) { 1538 if (!UDT) { 1539 Probing = 1; 1540 UDT = atari_disk_type + StartDiskType[DriveType]; 1541 set_capacity(bd->rq->rq_disk, UDT->blocks); 1542 UD.autoprobe = 1; 1543 } 1544 } 1545 else { 1546 /* user supplied disk type */ 1547 if (--type >= NUM_DISK_MINORS) { 1548 printk(KERN_WARNING "fd%d: invalid disk format", drive ); 1549 fd_end_request_cur(BLK_STS_IOERR); 1550 stdma_release(); 1551 goto out; 1552 } 1553 if (minor2disktype[type].drive_types > DriveType) { 1554 printk(KERN_WARNING "fd%d: unsupported disk format", drive ); 1555 fd_end_request_cur(BLK_STS_IOERR); 1556 stdma_release(); 1557 goto out; 1558 } 1559 type = minor2disktype[type].index; 1560 UDT = &atari_disk_type[type]; 1561 set_capacity(bd->rq->rq_disk, UDT->blocks); 1562 UD.autoprobe = 0; 1563 } 1564 1565 /* stop deselect timer */ 1566 del_timer( &motor_off_timer ); 1567 1568 ReqCnt = 0; 1569 ReqCmd = rq_data_dir(fd_request); 1570 ReqBlock = blk_rq_pos(fd_request); 1571 ReqBuffer = bio_data(fd_request->bio); 1572 setup_req_params( drive ); 1573 do_fd_action( drive ); 1574 1575 atari_enable_irq( IRQ_MFP_FDC ); 1576 1577 out: 1578 spin_unlock_irq(&ataflop_lock); 1579 return BLK_STS_OK; 1580 } 1581 1582 static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, 1583 unsigned int cmd, unsigned long param) 1584 { 1585 struct gendisk *disk = bdev->bd_disk; 1586 struct atari_floppy_struct *floppy = disk->private_data; 1587 int drive = floppy - unit; 1588 int type = floppy->type; 1589 struct atari_format_descr fmt_desc; 1590 struct atari_disk_type *dtp; 1591 struct floppy_struct getprm; 1592 int settype; 1593 struct floppy_struct setprm; 1594 void __user *argp = (void __user *)param; 1595 1596 switch (cmd) { 1597 case FDGETPRM: 1598 if (type) { 1599 if (--type >= NUM_DISK_MINORS) 1600 return -ENODEV; 1601 if (minor2disktype[type].drive_types > DriveType) 1602 return -ENODEV; 1603 type = minor2disktype[type].index; 1604 dtp = &atari_disk_type[type]; 1605 if (UD.flags & FTD_MSG) 1606 printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", 1607 drive, dtp, dtp->name); 1608 } 1609 else { 1610 if (!UDT) 1611 return -ENXIO; 1612 else 1613 dtp = UDT; 1614 } 1615 memset((void *)&getprm, 0, sizeof(getprm)); 1616 getprm.size = dtp->blocks; 1617 getprm.sect = dtp->spt; 1618 getprm.head = 2; 1619 getprm.track = dtp->blocks/dtp->spt/2; 1620 getprm.stretch = dtp->stretch; 1621 if (copy_to_user(argp, &getprm, sizeof(getprm))) 1622 return -EFAULT; 1623 return 0; 1624 } 1625 switch (cmd) { 1626 case FDSETPRM: 1627 case FDDEFPRM: 1628 /* 1629 * MSch 7/96: simple 'set geometry' case: just set the 1630 * 'default' device params (minor == 0). 1631 * Currently, the drive geometry is cleared after each 1632 * disk change and subsequent revalidate()! simple 1633 * implementation of FDDEFPRM: save geometry from a 1634 * FDDEFPRM call and restore it in floppy_revalidate() ! 1635 */ 1636 1637 /* get the parameters from user space */ 1638 if (floppy->ref != 1 && floppy->ref != -1) 1639 return -EBUSY; 1640 if (copy_from_user(&setprm, argp, sizeof(setprm))) 1641 return -EFAULT; 1642 /* 1643 * first of all: check for floppy change and revalidate, 1644 * or the next access will revalidate - and clear UDT :-( 1645 */ 1646 1647 if (floppy_check_events(disk, 0)) 1648 floppy_revalidate(disk); 1649 1650 if (UD.flags & FTD_MSG) 1651 printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", 1652 drive, setprm.size, setprm.sect, setprm.stretch); 1653 1654 /* what if type > 0 here? Overwrite specified entry ? */ 1655 if (type) { 1656 /* refuse to re-set a predefined type for now */ 1657 finish_fdc(); 1658 return -EINVAL; 1659 } 1660 1661 /* 1662 * type == 0: first look for a matching entry in the type list, 1663 * and set the UD.disktype field to use the perdefined entry. 1664 * TODO: add user-defined format to head of autoprobe list ? 1665 * Useful to include the user-type for future autodetection! 1666 */ 1667 1668 for (settype = 0; settype < NUM_DISK_MINORS; settype++) { 1669 int setidx = 0; 1670 if (minor2disktype[settype].drive_types > DriveType) { 1671 /* skip this one, invalid for drive ... */ 1672 continue; 1673 } 1674 setidx = minor2disktype[settype].index; 1675 dtp = &atari_disk_type[setidx]; 1676 1677 /* found matching entry ?? */ 1678 if ( dtp->blocks == setprm.size 1679 && dtp->spt == setprm.sect 1680 && dtp->stretch == setprm.stretch ) { 1681 if (UD.flags & FTD_MSG) 1682 printk (KERN_INFO "floppy%d: setting %s %p!\n", 1683 drive, dtp->name, dtp); 1684 UDT = dtp; 1685 set_capacity(disk, UDT->blocks); 1686 1687 if (cmd == FDDEFPRM) { 1688 /* save settings as permanent default type */ 1689 default_params[drive].name = dtp->name; 1690 default_params[drive].spt = dtp->spt; 1691 default_params[drive].blocks = dtp->blocks; 1692 default_params[drive].fdc_speed = dtp->fdc_speed; 1693 default_params[drive].stretch = dtp->stretch; 1694 } 1695 1696 return 0; 1697 } 1698 1699 } 1700 1701 /* no matching disk type found above - setting user_params */ 1702 1703 if (cmd == FDDEFPRM) { 1704 /* set permanent type */ 1705 dtp = &default_params[drive]; 1706 } else 1707 /* set user type (reset by disk change!) */ 1708 dtp = &user_params[drive]; 1709 1710 dtp->name = "user format"; 1711 dtp->blocks = setprm.size; 1712 dtp->spt = setprm.sect; 1713 if (setprm.sect > 14) 1714 dtp->fdc_speed = 3; 1715 else 1716 dtp->fdc_speed = 0; 1717 dtp->stretch = setprm.stretch; 1718 1719 if (UD.flags & FTD_MSG) 1720 printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", 1721 drive, dtp->blocks, dtp->spt, dtp->stretch); 1722 1723 /* sanity check */ 1724 if (setprm.track != dtp->blocks/dtp->spt/2 || 1725 setprm.head != 2) { 1726 finish_fdc(); 1727 return -EINVAL; 1728 } 1729 1730 UDT = dtp; 1731 set_capacity(disk, UDT->blocks); 1732 1733 return 0; 1734 case FDMSGON: 1735 UD.flags |= FTD_MSG; 1736 return 0; 1737 case FDMSGOFF: 1738 UD.flags &= ~FTD_MSG; 1739 return 0; 1740 case FDSETEMSGTRESH: 1741 return -EINVAL; 1742 case FDFMTBEG: 1743 return 0; 1744 case FDFMTTRK: 1745 if (floppy->ref != 1 && floppy->ref != -1) 1746 return -EBUSY; 1747 if (copy_from_user(&fmt_desc, argp, sizeof(fmt_desc))) 1748 return -EFAULT; 1749 return do_format(drive, type, &fmt_desc); 1750 case FDCLRPRM: 1751 UDT = NULL; 1752 /* MSch: invalidate default_params */ 1753 default_params[drive].blocks = 0; 1754 set_capacity(disk, MAX_DISK_SIZE * 2); 1755 fallthrough; 1756 case FDFMTEND: 1757 case FDFLUSH: 1758 /* invalidate the buffer track to force a reread */ 1759 BufferDrive = -1; 1760 set_bit(drive, &fake_change); 1761 if (bdev_check_media_change(bdev)) 1762 floppy_revalidate(bdev->bd_disk); 1763 return 0; 1764 default: 1765 return -EINVAL; 1766 } 1767 } 1768 1769 static int fd_ioctl(struct block_device *bdev, fmode_t mode, 1770 unsigned int cmd, unsigned long arg) 1771 { 1772 int ret; 1773 1774 mutex_lock(&ataflop_mutex); 1775 ret = fd_locked_ioctl(bdev, mode, cmd, arg); 1776 mutex_unlock(&ataflop_mutex); 1777 1778 return ret; 1779 } 1780 1781 /* Initialize the 'unit' variable for drive 'drive' */ 1782 1783 static void __init fd_probe( int drive ) 1784 { 1785 UD.connected = 0; 1786 UDT = NULL; 1787 1788 if (!fd_test_drive_present( drive )) 1789 return; 1790 1791 UD.connected = 1; 1792 UD.track = 0; 1793 switch( UserSteprate[drive] ) { 1794 case 2: 1795 UD.steprate = FDCSTEP_2; 1796 break; 1797 case 3: 1798 UD.steprate = FDCSTEP_3; 1799 break; 1800 case 6: 1801 UD.steprate = FDCSTEP_6; 1802 break; 1803 case 12: 1804 UD.steprate = FDCSTEP_12; 1805 break; 1806 default: /* should be -1 for "not set by user" */ 1807 if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) 1808 UD.steprate = FDCSTEP_3; 1809 else 1810 UD.steprate = FDCSTEP_6; 1811 break; 1812 } 1813 MotorOn = 1; /* from probe restore operation! */ 1814 } 1815 1816 1817 /* This function tests the physical presence of a floppy drive (not 1818 * whether a disk is inserted). This is done by issuing a restore 1819 * command, waiting max. 2 seconds (that should be enough to move the 1820 * head across the whole disk) and looking at the state of the "TR00" 1821 * signal. This should now be raised if there is a drive connected 1822 * (and there is no hardware failure :-) Otherwise, the drive is 1823 * declared absent. 1824 */ 1825 1826 static int __init fd_test_drive_present( int drive ) 1827 { 1828 unsigned long timeout; 1829 unsigned char status; 1830 int ok; 1831 1832 if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); 1833 fd_select_drive( drive ); 1834 1835 /* disable interrupt temporarily */ 1836 atari_turnoff_irq( IRQ_MFP_FDC ); 1837 FDC_WRITE (FDCREG_TRACK, 0xff00); 1838 FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); 1839 1840 timeout = jiffies + 2*HZ+HZ/2; 1841 while (time_before(jiffies, timeout)) 1842 if (!(st_mfp.par_dt_reg & 0x20)) 1843 break; 1844 1845 status = FDC_READ( FDCREG_STATUS ); 1846 ok = (status & FDCSTAT_TR00) != 0; 1847 1848 /* force interrupt to abort restore operation (FDC would try 1849 * about 50 seconds!) */ 1850 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1851 udelay(500); 1852 status = FDC_READ( FDCREG_STATUS ); 1853 udelay(20); 1854 1855 if (ok) { 1856 /* dummy seek command to make WP bit accessible */ 1857 FDC_WRITE( FDCREG_DATA, 0 ); 1858 FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); 1859 while( st_mfp.par_dt_reg & 0x20 ) 1860 ; 1861 status = FDC_READ( FDCREG_STATUS ); 1862 } 1863 1864 atari_turnon_irq( IRQ_MFP_FDC ); 1865 return( ok ); 1866 } 1867 1868 1869 /* Look how many and which kind of drives are connected. If there are 1870 * floppies, additionally start the disk-change and motor-off timers. 1871 */ 1872 1873 static void __init config_types( void ) 1874 { 1875 int drive, cnt = 0; 1876 1877 /* for probing drives, set the FDC speed to 8 MHz */ 1878 if (ATARIHW_PRESENT(FDCSPEED)) 1879 dma_wd.fdc_speed = 0; 1880 1881 printk(KERN_INFO "Probing floppy drive(s):\n"); 1882 for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { 1883 fd_probe( drive ); 1884 if (UD.connected) { 1885 printk(KERN_INFO "fd%d\n", drive); 1886 ++cnt; 1887 } 1888 } 1889 1890 if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { 1891 /* If FDC is still busy from probing, give it another FORCI 1892 * command to abort the operation. If this isn't done, the FDC 1893 * will interrupt later and its IRQ line stays low, because 1894 * the status register isn't read. And this will block any 1895 * interrupts on this IRQ line :-( 1896 */ 1897 FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); 1898 udelay(500); 1899 FDC_READ( FDCREG_STATUS ); 1900 udelay(20); 1901 } 1902 1903 if (cnt > 0) { 1904 start_motor_off_timer(); 1905 if (cnt == 1) fd_select_drive( 0 ); 1906 start_check_change_timer(); 1907 } 1908 } 1909 1910 /* 1911 * floppy_open check for aliasing (/dev/fd0 can be the same as 1912 * /dev/PS0 etc), and disallows simultaneous access to the same 1913 * drive with different device numbers. 1914 */ 1915 1916 static int floppy_open(struct block_device *bdev, fmode_t mode) 1917 { 1918 struct atari_floppy_struct *p = bdev->bd_disk->private_data; 1919 int type = MINOR(bdev->bd_dev) >> 2; 1920 1921 DPRINT(("fd_open: type=%d\n",type)); 1922 if (p->ref && p->type != type) 1923 return -EBUSY; 1924 1925 if (p->ref == -1 || (p->ref && mode & FMODE_EXCL)) 1926 return -EBUSY; 1927 1928 if (mode & FMODE_EXCL) 1929 p->ref = -1; 1930 else 1931 p->ref++; 1932 1933 p->type = type; 1934 1935 if (mode & FMODE_NDELAY) 1936 return 0; 1937 1938 if (mode & (FMODE_READ|FMODE_WRITE)) { 1939 if (bdev_check_media_change(bdev)) 1940 floppy_revalidate(bdev->bd_disk); 1941 if (mode & FMODE_WRITE) { 1942 if (p->wpstat) { 1943 if (p->ref < 0) 1944 p->ref = 0; 1945 else 1946 p->ref--; 1947 return -EROFS; 1948 } 1949 } 1950 } 1951 return 0; 1952 } 1953 1954 static int floppy_unlocked_open(struct block_device *bdev, fmode_t mode) 1955 { 1956 int ret; 1957 1958 mutex_lock(&ataflop_mutex); 1959 ret = floppy_open(bdev, mode); 1960 mutex_unlock(&ataflop_mutex); 1961 1962 return ret; 1963 } 1964 1965 static void floppy_release(struct gendisk *disk, fmode_t mode) 1966 { 1967 struct atari_floppy_struct *p = disk->private_data; 1968 mutex_lock(&ataflop_mutex); 1969 if (p->ref < 0) 1970 p->ref = 0; 1971 else if (!p->ref--) { 1972 printk(KERN_ERR "floppy_release with fd_ref == 0"); 1973 p->ref = 0; 1974 } 1975 mutex_unlock(&ataflop_mutex); 1976 } 1977 1978 static const struct block_device_operations floppy_fops = { 1979 .owner = THIS_MODULE, 1980 .open = floppy_unlocked_open, 1981 .release = floppy_release, 1982 .ioctl = fd_ioctl, 1983 .check_events = floppy_check_events, 1984 }; 1985 1986 static const struct blk_mq_ops ataflop_mq_ops = { 1987 .queue_rq = ataflop_queue_rq, 1988 }; 1989 1990 static int ataflop_alloc_disk(unsigned int drive, unsigned int type) 1991 { 1992 struct gendisk *disk; 1993 1994 disk = blk_mq_alloc_disk(&unit[drive].tag_set, NULL); 1995 if (IS_ERR(disk)) 1996 return PTR_ERR(disk); 1997 1998 disk->major = FLOPPY_MAJOR; 1999 disk->first_minor = drive + (type << 2); 2000 disk->minors = 1; 2001 sprintf(disk->disk_name, "fd%d", drive); 2002 disk->fops = &floppy_fops; 2003 disk->events = DISK_EVENT_MEDIA_CHANGE; 2004 disk->private_data = &unit[drive]; 2005 set_capacity(disk, MAX_DISK_SIZE * 2); 2006 2007 unit[drive].disk[type] = disk; 2008 return 0; 2009 } 2010 2011 static void ataflop_probe(dev_t dev) 2012 { 2013 int drive = MINOR(dev) & 3; 2014 int type = MINOR(dev) >> 2; 2015 2016 if (type) 2017 type--; 2018 2019 if (drive >= FD_MAX_UNITS || type >= NUM_DISK_MINORS) 2020 return; 2021 if (unit[drive].disk[type]) 2022 return; 2023 if (ataflop_alloc_disk(drive, type)) 2024 return; 2025 if (add_disk(unit[drive].disk[type])) 2026 goto cleanup_disk; 2027 unit[drive].registered[type] = true; 2028 return; 2029 2030 cleanup_disk: 2031 blk_cleanup_disk(unit[drive].disk[type]); 2032 unit[drive].disk[type] = NULL; 2033 } 2034 2035 static void atari_floppy_cleanup(void) 2036 { 2037 int i; 2038 int type; 2039 2040 for (i = 0; i < FD_MAX_UNITS; i++) { 2041 for (type = 0; type < NUM_DISK_MINORS; type++) { 2042 if (!unit[i].disk[type]) 2043 continue; 2044 del_gendisk(unit[i].disk[type]); 2045 blk_cleanup_queue(unit[i].disk[type]->queue); 2046 put_disk(unit[i].disk[type]); 2047 } 2048 blk_mq_free_tag_set(&unit[i].tag_set); 2049 } 2050 2051 del_timer_sync(&fd_timer); 2052 atari_stram_free(DMABuffer); 2053 } 2054 2055 static void atari_cleanup_floppy_disk(struct atari_floppy_struct *fs) 2056 { 2057 int type; 2058 2059 for (type = 0; type < NUM_DISK_MINORS; type++) { 2060 if (!fs->disk[type]) 2061 continue; 2062 if (fs->registered[type]) 2063 del_gendisk(fs->disk[type]); 2064 blk_cleanup_disk(fs->disk[type]); 2065 } 2066 blk_mq_free_tag_set(&fs->tag_set); 2067 } 2068 2069 static int __init atari_floppy_init (void) 2070 { 2071 int i; 2072 int ret; 2073 2074 if (!MACH_IS_ATARI) 2075 /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ 2076 return -ENODEV; 2077 2078 for (i = 0; i < FD_MAX_UNITS; i++) { 2079 memset(&unit[i].tag_set, 0, sizeof(unit[i].tag_set)); 2080 unit[i].tag_set.ops = &ataflop_mq_ops; 2081 unit[i].tag_set.nr_hw_queues = 1; 2082 unit[i].tag_set.nr_maps = 1; 2083 unit[i].tag_set.queue_depth = 2; 2084 unit[i].tag_set.numa_node = NUMA_NO_NODE; 2085 unit[i].tag_set.flags = BLK_MQ_F_SHOULD_MERGE; 2086 ret = blk_mq_alloc_tag_set(&unit[i].tag_set); 2087 if (ret) 2088 goto err; 2089 2090 ret = ataflop_alloc_disk(i, 0); 2091 if (ret) { 2092 blk_mq_free_tag_set(&unit[i].tag_set); 2093 goto err; 2094 } 2095 } 2096 2097 if (UseTrackbuffer < 0) 2098 /* not set by user -> use default: for now, we turn 2099 track buffering off for all Medusas, though it 2100 could be used with ones that have a counter 2101 card. But the test is too hard :-( */ 2102 UseTrackbuffer = !MACH_IS_MEDUSA; 2103 2104 /* initialize variables */ 2105 SelectedDrive = -1; 2106 BufferDrive = -1; 2107 2108 DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); 2109 if (!DMABuffer) { 2110 printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); 2111 ret = -ENOMEM; 2112 goto err; 2113 } 2114 TrackBuffer = DMABuffer + 512; 2115 PhysDMABuffer = atari_stram_to_phys(DMABuffer); 2116 PhysTrackBuffer = virt_to_phys(TrackBuffer); 2117 BufferDrive = BufferSide = BufferTrack = -1; 2118 2119 for (i = 0; i < FD_MAX_UNITS; i++) { 2120 unit[i].track = -1; 2121 unit[i].flags = 0; 2122 ret = add_disk(unit[i].disk[0]); 2123 if (ret) 2124 goto err_out_dma; 2125 unit[i].registered[0] = true; 2126 } 2127 2128 printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", 2129 DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', 2130 UseTrackbuffer ? "" : "no "); 2131 config_types(); 2132 2133 ret = __register_blkdev(FLOPPY_MAJOR, "fd", ataflop_probe); 2134 if (ret) { 2135 printk(KERN_ERR "atari_floppy_init: cannot register block device\n"); 2136 atari_floppy_cleanup(); 2137 } 2138 return ret; 2139 2140 err_out_dma: 2141 atari_stram_free(DMABuffer); 2142 err: 2143 while (--i >= 0) 2144 atari_cleanup_floppy_disk(&unit[i]); 2145 2146 return ret; 2147 } 2148 2149 #ifndef MODULE 2150 static int __init atari_floppy_setup(char *str) 2151 { 2152 int ints[3 + FD_MAX_UNITS]; 2153 int i; 2154 2155 if (!MACH_IS_ATARI) 2156 return 0; 2157 2158 str = get_options(str, 3 + FD_MAX_UNITS, ints); 2159 2160 if (ints[0] < 1) { 2161 printk(KERN_ERR "ataflop_setup: no arguments!\n" ); 2162 return 0; 2163 } 2164 else if (ints[0] > 2+FD_MAX_UNITS) { 2165 printk(KERN_ERR "ataflop_setup: too many arguments\n" ); 2166 } 2167 2168 if (ints[1] < 0 || ints[1] > 2) 2169 printk(KERN_ERR "ataflop_setup: bad drive type\n" ); 2170 else 2171 DriveType = ints[1]; 2172 2173 if (ints[0] >= 2) 2174 UseTrackbuffer = (ints[2] > 0); 2175 2176 for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { 2177 if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) 2178 printk(KERN_ERR "ataflop_setup: bad steprate\n" ); 2179 else 2180 UserSteprate[i-3] = ints[i]; 2181 } 2182 return 1; 2183 } 2184 2185 __setup("floppy=", atari_floppy_setup); 2186 #endif 2187 2188 static void __exit atari_floppy_exit(void) 2189 { 2190 unregister_blkdev(FLOPPY_MAJOR, "fd"); 2191 atari_floppy_cleanup(); 2192 } 2193 2194 module_init(atari_floppy_init) 2195 module_exit(atari_floppy_exit) 2196 2197 MODULE_LICENSE("GPL"); 2198