Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * drivers/block/ataflop.c |
| 3 | * |
| 4 | * Copyright (C) 1993 Greg Harp |
| 5 | * Atari Support by Bjoern Brauel, Roman Hodek |
| 6 | * |
| 7 | * Big cleanup Sep 11..14 1994 Roman Hodek: |
| 8 | * - Driver now works interrupt driven |
| 9 | * - Support for two drives; should work, but I cannot test that :-( |
| 10 | * - Reading is done in whole tracks and buffered to speed up things |
| 11 | * - Disk change detection and drive deselecting after motor-off |
| 12 | * similar to TOS |
| 13 | * - Autodetection of disk format (DD/HD); untested yet, because I |
| 14 | * don't have an HD drive :-( |
| 15 | * |
| 16 | * Fixes Nov 13 1994 Martin Schaller: |
| 17 | * - Autodetection works now |
| 18 | * - Support for 5 1/4'' disks |
| 19 | * - Removed drive type (unknown on atari) |
| 20 | * - Do seeks with 8 Mhz |
| 21 | * |
| 22 | * Changes by Andreas Schwab: |
| 23 | * - After errors in multiple read mode try again reading single sectors |
| 24 | * (Feb 1995): |
| 25 | * - Clean up error handling |
| 26 | * - Set blk_size for proper size checking |
| 27 | * - Initialize track register when testing presence of floppy |
| 28 | * - Implement some ioctl's |
| 29 | * |
| 30 | * Changes by Torsten Lang: |
| 31 | * - When probing the floppies we should add the FDCCMDADD_H flag since |
| 32 | * the FDC will otherwise wait forever when no disk is inserted... |
| 33 | * |
| 34 | * ++ Freddi Aschwanden (fa) 20.9.95 fixes for medusa: |
| 35 | * - MFPDELAY() after each FDC access -> atari |
| 36 | * - more/other disk formats |
| 37 | * - DMA to the block buffer directly if we have a 32bit DMA |
| 38 | * - for medusa, the step rate is always 3ms |
| 39 | * - on medusa, use only cache_push() |
| 40 | * Roman: |
| 41 | * - Make disk format numbering independent from minors |
| 42 | * - Let user set max. supported drive type (speeds up format |
| 43 | * detection, saves buffer space) |
| 44 | * |
| 45 | * Roman 10/15/95: |
| 46 | * - implement some more ioctls |
| 47 | * - disk formatting |
| 48 | * |
| 49 | * Andreas 95/12/12: |
| 50 | * - increase gap size at start of track for HD/ED disks |
| 51 | * |
| 52 | * Michael (MSch) 11/07/96: |
| 53 | * - implemented FDSETPRM and FDDEFPRM ioctl |
| 54 | * |
| 55 | * Andreas (97/03/19): |
| 56 | * - implemented missing BLK* ioctls |
| 57 | * |
| 58 | * Things left to do: |
| 59 | * - Formatting |
| 60 | * - Maybe a better strategy for disk change detection (does anyone |
| 61 | * know one?) |
| 62 | */ |
| 63 | |
| 64 | #include <linux/module.h> |
| 65 | |
| 66 | #include <linux/fd.h> |
| 67 | #include <linux/delay.h> |
| 68 | #include <linux/init.h> |
| 69 | #include <linux/blkdev.h> |
| 70 | |
| 71 | #include <asm/atafd.h> |
| 72 | #include <asm/atafdreg.h> |
| 73 | #include <asm/atariints.h> |
| 74 | #include <asm/atari_stdma.h> |
| 75 | #include <asm/atari_stram.h> |
| 76 | |
| 77 | #define FD_MAX_UNITS 2 |
| 78 | |
| 79 | #undef DEBUG |
| 80 | |
| 81 | static struct request_queue *floppy_queue; |
| 82 | |
| 83 | #define QUEUE (floppy_queue) |
| 84 | #define CURRENT elv_next_request(floppy_queue) |
| 85 | |
| 86 | /* Disk types: DD, HD, ED */ |
| 87 | static struct atari_disk_type { |
| 88 | const char *name; |
| 89 | unsigned spt; /* sectors per track */ |
| 90 | unsigned blocks; /* total number of blocks */ |
| 91 | unsigned fdc_speed; /* fdc_speed setting */ |
| 92 | unsigned stretch; /* track doubling ? */ |
| 93 | } disk_type[] = { |
| 94 | { "d360", 9, 720, 0, 0}, /* 0: 360kB diskette */ |
| 95 | { "D360", 9, 720, 0, 1}, /* 1: 360kb in 720k or 1.2MB drive */ |
| 96 | { "D720", 9,1440, 0, 0}, /* 2: 720kb in 720k or 1.2MB drive */ |
| 97 | { "D820", 10,1640, 0, 0}, /* 3: DD disk with 82 tracks/10 sectors */ |
| 98 | /* formats above are probed for type DD */ |
| 99 | #define MAX_TYPE_DD 3 |
| 100 | { "h1200",15,2400, 3, 0}, /* 4: 1.2MB diskette */ |
| 101 | { "H1440",18,2880, 3, 0}, /* 5: 1.4 MB diskette (HD) */ |
| 102 | { "H1640",20,3280, 3, 0}, /* 6: 1.64MB diskette (fat HD) 82 tr 20 sec */ |
| 103 | /* formats above are probed for types DD and HD */ |
| 104 | #define MAX_TYPE_HD 6 |
| 105 | { "E2880",36,5760, 3, 0}, /* 7: 2.8 MB diskette (ED) */ |
| 106 | { "E3280",40,6560, 3, 0}, /* 8: 3.2 MB diskette (fat ED) 82 tr 40 sec */ |
| 107 | /* formats above are probed for types DD, HD and ED */ |
| 108 | #define MAX_TYPE_ED 8 |
| 109 | /* types below are never autoprobed */ |
| 110 | { "H1680",21,3360, 3, 0}, /* 9: 1.68MB diskette (fat HD) 80 tr 21 sec */ |
| 111 | { "h410",10,820, 0, 1}, /* 10: 410k diskette 41 tr 10 sec, stretch */ |
| 112 | { "h1476",18,2952, 3, 0}, /* 11: 1.48MB diskette 82 tr 18 sec */ |
| 113 | { "H1722",21,3444, 3, 0}, /* 12: 1.72MB diskette 82 tr 21 sec */ |
| 114 | { "h420",10,840, 0, 1}, /* 13: 420k diskette 42 tr 10 sec, stretch */ |
| 115 | { "H830",10,1660, 0, 0}, /* 14: 820k diskette 83 tr 10 sec */ |
| 116 | { "h1494",18,2952, 3, 0}, /* 15: 1.49MB diskette 83 tr 18 sec */ |
| 117 | { "H1743",21,3486, 3, 0}, /* 16: 1.74MB diskette 83 tr 21 sec */ |
| 118 | { "h880",11,1760, 0, 0}, /* 17: 880k diskette 80 tr 11 sec */ |
| 119 | { "D1040",13,2080, 0, 0}, /* 18: 1.04MB diskette 80 tr 13 sec */ |
| 120 | { "D1120",14,2240, 0, 0}, /* 19: 1.12MB diskette 80 tr 14 sec */ |
| 121 | { "h1600",20,3200, 3, 0}, /* 20: 1.60MB diskette 80 tr 20 sec */ |
| 122 | { "H1760",22,3520, 3, 0}, /* 21: 1.76MB diskette 80 tr 22 sec */ |
| 123 | { "H1920",24,3840, 3, 0}, /* 22: 1.92MB diskette 80 tr 24 sec */ |
| 124 | { "E3200",40,6400, 3, 0}, /* 23: 3.2MB diskette 80 tr 40 sec */ |
| 125 | { "E3520",44,7040, 3, 0}, /* 24: 3.52MB diskette 80 tr 44 sec */ |
| 126 | { "E3840",48,7680, 3, 0}, /* 25: 3.84MB diskette 80 tr 48 sec */ |
| 127 | { "H1840",23,3680, 3, 0}, /* 26: 1.84MB diskette 80 tr 23 sec */ |
| 128 | { "D800",10,1600, 0, 0}, /* 27: 800k diskette 80 tr 10 sec */ |
| 129 | }; |
| 130 | |
| 131 | static int StartDiskType[] = { |
| 132 | MAX_TYPE_DD, |
| 133 | MAX_TYPE_HD, |
| 134 | MAX_TYPE_ED |
| 135 | }; |
| 136 | |
| 137 | #define TYPE_DD 0 |
| 138 | #define TYPE_HD 1 |
| 139 | #define TYPE_ED 2 |
| 140 | |
| 141 | static int DriveType = TYPE_HD; |
| 142 | |
| 143 | static DEFINE_SPINLOCK(ataflop_lock); |
| 144 | |
| 145 | /* Array for translating minors into disk formats */ |
| 146 | static struct { |
| 147 | int index; |
| 148 | unsigned drive_types; |
| 149 | } minor2disktype[] = { |
| 150 | { 0, TYPE_DD }, /* 1: d360 */ |
| 151 | { 4, TYPE_HD }, /* 2: h1200 */ |
| 152 | { 1, TYPE_DD }, /* 3: D360 */ |
| 153 | { 2, TYPE_DD }, /* 4: D720 */ |
| 154 | { 1, TYPE_DD }, /* 5: h360 = D360 */ |
| 155 | { 2, TYPE_DD }, /* 6: h720 = D720 */ |
| 156 | { 5, TYPE_HD }, /* 7: H1440 */ |
| 157 | { 7, TYPE_ED }, /* 8: E2880 */ |
| 158 | /* some PC formats :-) */ |
| 159 | { 8, TYPE_ED }, /* 9: E3280 <- was "CompaQ" == E2880 for PC */ |
| 160 | { 5, TYPE_HD }, /* 10: h1440 = H1440 */ |
| 161 | { 9, TYPE_HD }, /* 11: H1680 */ |
| 162 | { 10, TYPE_DD }, /* 12: h410 */ |
| 163 | { 3, TYPE_DD }, /* 13: H820 <- == D820, 82x10 */ |
| 164 | { 11, TYPE_HD }, /* 14: h1476 */ |
| 165 | { 12, TYPE_HD }, /* 15: H1722 */ |
| 166 | { 13, TYPE_DD }, /* 16: h420 */ |
| 167 | { 14, TYPE_DD }, /* 17: H830 */ |
| 168 | { 15, TYPE_HD }, /* 18: h1494 */ |
| 169 | { 16, TYPE_HD }, /* 19: H1743 */ |
| 170 | { 17, TYPE_DD }, /* 20: h880 */ |
| 171 | { 18, TYPE_DD }, /* 21: D1040 */ |
| 172 | { 19, TYPE_DD }, /* 22: D1120 */ |
| 173 | { 20, TYPE_HD }, /* 23: h1600 */ |
| 174 | { 21, TYPE_HD }, /* 24: H1760 */ |
| 175 | { 22, TYPE_HD }, /* 25: H1920 */ |
| 176 | { 23, TYPE_ED }, /* 26: E3200 */ |
| 177 | { 24, TYPE_ED }, /* 27: E3520 */ |
| 178 | { 25, TYPE_ED }, /* 28: E3840 */ |
| 179 | { 26, TYPE_HD }, /* 29: H1840 */ |
| 180 | { 27, TYPE_DD }, /* 30: D800 */ |
| 181 | { 6, TYPE_HD }, /* 31: H1640 <- was H1600 == h1600 for PC */ |
| 182 | }; |
| 183 | |
| 184 | #define NUM_DISK_MINORS (sizeof(minor2disktype)/sizeof(*minor2disktype)) |
| 185 | |
| 186 | /* |
| 187 | * Maximum disk size (in kilobytes). This default is used whenever the |
| 188 | * current disk size is unknown. |
| 189 | */ |
| 190 | #define MAX_DISK_SIZE 3280 |
| 191 | |
| 192 | /* |
| 193 | * MSch: User-provided type information. 'drive' points to |
| 194 | * the respective entry of this array. Set by FDSETPRM ioctls. |
| 195 | */ |
| 196 | static struct atari_disk_type user_params[FD_MAX_UNITS]; |
| 197 | |
| 198 | /* |
| 199 | * User-provided permanent type information. 'drive' points to |
| 200 | * the respective entry of this array. Set by FDDEFPRM ioctls, |
| 201 | * restored upon disk change by floppy_revalidate() if valid (as seen by |
| 202 | * default_params[].blocks > 0 - a bit in unit[].flags might be used for this?) |
| 203 | */ |
| 204 | static struct atari_disk_type default_params[FD_MAX_UNITS]; |
| 205 | |
| 206 | /* current info on each unit */ |
| 207 | static struct atari_floppy_struct { |
| 208 | int connected; /* !=0 : drive is connected */ |
| 209 | int autoprobe; /* !=0 : do autoprobe */ |
| 210 | |
| 211 | struct atari_disk_type *disktype; /* current type of disk */ |
| 212 | |
| 213 | int track; /* current head position or -1 if |
| 214 | unknown */ |
| 215 | unsigned int steprate; /* steprate setting */ |
| 216 | unsigned int wpstat; /* current state of WP signal (for |
| 217 | disk change detection) */ |
| 218 | int flags; /* flags */ |
| 219 | struct gendisk *disk; |
| 220 | int ref; |
| 221 | int type; |
| 222 | } unit[FD_MAX_UNITS]; |
| 223 | |
| 224 | #define UD unit[drive] |
| 225 | #define UDT unit[drive].disktype |
| 226 | #define SUD unit[SelectedDrive] |
| 227 | #define SUDT unit[SelectedDrive].disktype |
| 228 | |
| 229 | |
| 230 | #define FDC_READ(reg) ({ \ |
| 231 | /* unsigned long __flags; */ \ |
| 232 | unsigned short __val; \ |
| 233 | /* local_irq_save(__flags); */ \ |
| 234 | dma_wd.dma_mode_status = 0x80 | (reg); \ |
| 235 | udelay(25); \ |
| 236 | __val = dma_wd.fdc_acces_seccount; \ |
| 237 | MFPDELAY(); \ |
| 238 | /* local_irq_restore(__flags); */ \ |
| 239 | __val & 0xff; \ |
| 240 | }) |
| 241 | |
| 242 | #define FDC_WRITE(reg,val) \ |
| 243 | do { \ |
| 244 | /* unsigned long __flags; */ \ |
| 245 | /* local_irq_save(__flags); */ \ |
| 246 | dma_wd.dma_mode_status = 0x80 | (reg); \ |
| 247 | udelay(25); \ |
| 248 | dma_wd.fdc_acces_seccount = (val); \ |
| 249 | MFPDELAY(); \ |
| 250 | /* local_irq_restore(__flags); */ \ |
| 251 | } while(0) |
| 252 | |
| 253 | |
| 254 | /* Buffering variables: |
| 255 | * First, there is a DMA buffer in ST-RAM that is used for floppy DMA |
| 256 | * operations. Second, a track buffer is used to cache a whole track |
| 257 | * of the disk to save read operations. These are two separate buffers |
| 258 | * because that allows write operations without clearing the track buffer. |
| 259 | */ |
| 260 | |
| 261 | static int MaxSectors[] = { |
| 262 | 11, 22, 44 |
| 263 | }; |
| 264 | static int BufferSize[] = { |
| 265 | 15*512, 30*512, 60*512 |
| 266 | }; |
| 267 | |
| 268 | #define BUFFER_SIZE (BufferSize[DriveType]) |
| 269 | |
| 270 | unsigned char *DMABuffer; /* buffer for writes */ |
| 271 | static unsigned long PhysDMABuffer; /* physical address */ |
| 272 | |
| 273 | static int UseTrackbuffer = -1; /* Do track buffering? */ |
| 274 | MODULE_PARM(UseTrackbuffer, "i"); |
| 275 | |
| 276 | unsigned char *TrackBuffer; /* buffer for reads */ |
| 277 | static unsigned long PhysTrackBuffer; /* physical address */ |
| 278 | static int BufferDrive, BufferSide, BufferTrack; |
| 279 | static int read_track; /* non-zero if we are reading whole tracks */ |
| 280 | |
| 281 | #define SECTOR_BUFFER(sec) (TrackBuffer + ((sec)-1)*512) |
| 282 | #define IS_BUFFERED(drive,side,track) \ |
| 283 | (BufferDrive == (drive) && BufferSide == (side) && BufferTrack == (track)) |
| 284 | |
| 285 | /* |
| 286 | * These are global variables, as that's the easiest way to give |
| 287 | * information to interrupts. They are the data used for the current |
| 288 | * request. |
| 289 | */ |
| 290 | static int SelectedDrive = 0; |
| 291 | static int ReqCmd, ReqBlock; |
| 292 | static int ReqSide, ReqTrack, ReqSector, ReqCnt; |
| 293 | static int HeadSettleFlag = 0; |
| 294 | static unsigned char *ReqData, *ReqBuffer; |
| 295 | static int MotorOn = 0, MotorOffTrys; |
| 296 | static int IsFormatting = 0, FormatError; |
| 297 | |
| 298 | static int UserSteprate[FD_MAX_UNITS] = { -1, -1 }; |
| 299 | MODULE_PARM(UserSteprate, "1-" __MODULE_STRING(FD_MAX_UNITS) "i"); |
| 300 | |
| 301 | /* Synchronization of FDC access. */ |
| 302 | static volatile int fdc_busy = 0; |
| 303 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); |
| 304 | static DECLARE_WAIT_QUEUE_HEAD(format_wait); |
| 305 | |
| 306 | static unsigned long changed_floppies = 0xff, fake_change = 0; |
| 307 | #define CHECK_CHANGE_DELAY HZ/2 |
| 308 | |
| 309 | #define FD_MOTOR_OFF_DELAY (3*HZ) |
| 310 | #define FD_MOTOR_OFF_MAXTRY (10*20) |
| 311 | |
| 312 | #define FLOPPY_TIMEOUT (6*HZ) |
| 313 | #define RECALIBRATE_ERRORS 4 /* After this many errors the drive |
| 314 | * will be recalibrated. */ |
| 315 | #define MAX_ERRORS 8 /* After this many errors the driver |
| 316 | * will give up. */ |
| 317 | |
| 318 | |
| 319 | /* |
| 320 | * The driver is trying to determine the correct media format |
| 321 | * while Probing is set. fd_rwsec_done() clears it after a |
| 322 | * successful access. |
| 323 | */ |
| 324 | static int Probing = 0; |
| 325 | |
| 326 | /* This flag is set when a dummy seek is necessary to make the WP |
| 327 | * status bit accessible. |
| 328 | */ |
| 329 | static int NeedSeek = 0; |
| 330 | |
| 331 | |
| 332 | #ifdef DEBUG |
| 333 | #define DPRINT(a) printk a |
| 334 | #else |
| 335 | #define DPRINT(a) |
| 336 | #endif |
| 337 | |
| 338 | /***************************** Prototypes *****************************/ |
| 339 | |
| 340 | static void fd_select_side( int side ); |
| 341 | static void fd_select_drive( int drive ); |
| 342 | static void fd_deselect( void ); |
| 343 | static void fd_motor_off_timer( unsigned long dummy ); |
| 344 | static void check_change( unsigned long dummy ); |
| 345 | static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp); |
| 346 | static void fd_error( void ); |
| 347 | static int do_format(int drive, int type, struct atari_format_descr *desc); |
| 348 | static void do_fd_action( int drive ); |
| 349 | static void fd_calibrate( void ); |
| 350 | static void fd_calibrate_done( int status ); |
| 351 | static void fd_seek( void ); |
| 352 | static void fd_seek_done( int status ); |
| 353 | static void fd_rwsec( void ); |
| 354 | static void fd_readtrack_check( unsigned long dummy ); |
| 355 | static void fd_rwsec_done( int status ); |
| 356 | static void fd_rwsec_done1(int status); |
| 357 | static void fd_writetrack( void ); |
| 358 | static void fd_writetrack_done( int status ); |
| 359 | static void fd_times_out( unsigned long dummy ); |
| 360 | static void finish_fdc( void ); |
| 361 | static void finish_fdc_done( int dummy ); |
| 362 | static void setup_req_params( int drive ); |
| 363 | static void redo_fd_request( void); |
| 364 | static int fd_ioctl( struct inode *inode, struct file *filp, unsigned int |
| 365 | cmd, unsigned long param); |
| 366 | static void fd_probe( int drive ); |
| 367 | static int fd_test_drive_present( int drive ); |
| 368 | static void config_types( void ); |
| 369 | static int floppy_open( struct inode *inode, struct file *filp ); |
| 370 | static int floppy_release( struct inode * inode, struct file * filp ); |
| 371 | |
| 372 | /************************* End of Prototypes **************************/ |
| 373 | |
Ingo Molnar | 8d06afa | 2005-09-09 13:10:40 -0700 | [diff] [blame] | 374 | static DEFINE_TIMER(motor_off_timer, fd_motor_off_timer, 0, 0); |
| 375 | static DEFINE_TIMER(readtrack_timer, fd_readtrack_check, 0, 0); |
| 376 | static DEFINE_TIMER(timeout_timer, fd_times_out, 0, 0); |
| 377 | static DEFINE_TIMER(fd_timer, check_change, 0, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
| 379 | static inline void start_motor_off_timer(void) |
| 380 | { |
| 381 | mod_timer(&motor_off_timer, jiffies + FD_MOTOR_OFF_DELAY); |
| 382 | MotorOffTrys = 0; |
| 383 | } |
| 384 | |
| 385 | static inline void start_check_change_timer( void ) |
| 386 | { |
| 387 | mod_timer(&fd_timer, jiffies + CHECK_CHANGE_DELAY); |
| 388 | } |
| 389 | |
| 390 | static inline void start_timeout(void) |
| 391 | { |
| 392 | mod_timer(&timeout_timer, jiffies + FLOPPY_TIMEOUT); |
| 393 | } |
| 394 | |
| 395 | static inline void stop_timeout(void) |
| 396 | { |
| 397 | del_timer(&timeout_timer); |
| 398 | } |
| 399 | |
| 400 | /* Select the side to use. */ |
| 401 | |
| 402 | static void fd_select_side( int side ) |
| 403 | { |
| 404 | unsigned long flags; |
| 405 | |
| 406 | /* protect against various other ints mucking around with the PSG */ |
| 407 | local_irq_save(flags); |
| 408 | |
| 409 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ |
| 410 | sound_ym.wd_data = (side == 0) ? sound_ym.rd_data_reg_sel | 0x01 : |
| 411 | sound_ym.rd_data_reg_sel & 0xfe; |
| 412 | |
| 413 | local_irq_restore(flags); |
| 414 | } |
| 415 | |
| 416 | |
| 417 | /* Select a drive, update the FDC's track register and set the correct |
| 418 | * clock speed for this disk's type. |
| 419 | */ |
| 420 | |
| 421 | static void fd_select_drive( int drive ) |
| 422 | { |
| 423 | unsigned long flags; |
| 424 | unsigned char tmp; |
| 425 | |
| 426 | if (drive == SelectedDrive) |
| 427 | return; |
| 428 | |
| 429 | /* protect against various other ints mucking around with the PSG */ |
| 430 | local_irq_save(flags); |
| 431 | sound_ym.rd_data_reg_sel = 14; /* Select PSG Port A */ |
| 432 | tmp = sound_ym.rd_data_reg_sel; |
| 433 | sound_ym.wd_data = (tmp | DSKDRVNONE) & ~(drive == 0 ? DSKDRV0 : DSKDRV1); |
| 434 | atari_dont_touch_floppy_select = 1; |
| 435 | local_irq_restore(flags); |
| 436 | |
| 437 | /* restore track register to saved value */ |
| 438 | FDC_WRITE( FDCREG_TRACK, UD.track ); |
| 439 | udelay(25); |
| 440 | |
| 441 | /* select 8/16 MHz */ |
| 442 | if (UDT) |
| 443 | if (ATARIHW_PRESENT(FDCSPEED)) |
| 444 | dma_wd.fdc_speed = UDT->fdc_speed; |
| 445 | |
| 446 | SelectedDrive = drive; |
| 447 | } |
| 448 | |
| 449 | |
| 450 | /* Deselect both drives. */ |
| 451 | |
| 452 | static void fd_deselect( void ) |
| 453 | { |
| 454 | unsigned long flags; |
| 455 | |
| 456 | /* protect against various other ints mucking around with the PSG */ |
| 457 | local_irq_save(flags); |
| 458 | atari_dont_touch_floppy_select = 0; |
| 459 | sound_ym.rd_data_reg_sel=14; /* Select PSG Port A */ |
| 460 | sound_ym.wd_data = (sound_ym.rd_data_reg_sel | |
| 461 | (MACH_IS_FALCON ? 3 : 7)); /* no drives selected */ |
| 462 | /* On Falcon, the drive B select line is used on the printer port, so |
| 463 | * leave it alone... */ |
| 464 | SelectedDrive = -1; |
| 465 | local_irq_restore(flags); |
| 466 | } |
| 467 | |
| 468 | |
| 469 | /* This timer function deselects the drives when the FDC switched the |
| 470 | * motor off. The deselection cannot happen earlier because the FDC |
| 471 | * counts the index signals, which arrive only if one drive is selected. |
| 472 | */ |
| 473 | |
| 474 | static void fd_motor_off_timer( unsigned long dummy ) |
| 475 | { |
| 476 | unsigned char status; |
| 477 | |
| 478 | if (SelectedDrive < 0) |
| 479 | /* no drive selected, needn't deselect anyone */ |
| 480 | return; |
| 481 | |
| 482 | if (stdma_islocked()) |
| 483 | goto retry; |
| 484 | |
| 485 | status = FDC_READ( FDCREG_STATUS ); |
| 486 | |
| 487 | if (!(status & 0x80)) { |
| 488 | /* motor already turned off by FDC -> deselect drives */ |
| 489 | MotorOn = 0; |
| 490 | fd_deselect(); |
| 491 | return; |
| 492 | } |
| 493 | /* not yet off, try again */ |
| 494 | |
| 495 | retry: |
| 496 | /* Test again later; if tested too often, it seems there is no disk |
| 497 | * in the drive and the FDC will leave the motor on forever (or, |
| 498 | * at least until a disk is inserted). So we'll test only twice |
| 499 | * per second from then on... |
| 500 | */ |
| 501 | mod_timer(&motor_off_timer, |
| 502 | jiffies + (MotorOffTrys++ < FD_MOTOR_OFF_MAXTRY ? HZ/20 : HZ/2)); |
| 503 | } |
| 504 | |
| 505 | |
| 506 | /* This function is repeatedly called to detect disk changes (as good |
| 507 | * as possible) and keep track of the current state of the write protection. |
| 508 | */ |
| 509 | |
| 510 | static void check_change( unsigned long dummy ) |
| 511 | { |
| 512 | static int drive = 0; |
| 513 | |
| 514 | unsigned long flags; |
| 515 | unsigned char old_porta; |
| 516 | int stat; |
| 517 | |
| 518 | if (++drive > 1 || !UD.connected) |
| 519 | drive = 0; |
| 520 | |
| 521 | /* protect against various other ints mucking around with the PSG */ |
| 522 | local_irq_save(flags); |
| 523 | |
| 524 | if (!stdma_islocked()) { |
| 525 | sound_ym.rd_data_reg_sel = 14; |
| 526 | old_porta = sound_ym.rd_data_reg_sel; |
| 527 | sound_ym.wd_data = (old_porta | DSKDRVNONE) & |
| 528 | ~(drive == 0 ? DSKDRV0 : DSKDRV1); |
| 529 | stat = !!(FDC_READ( FDCREG_STATUS ) & FDCSTAT_WPROT); |
| 530 | sound_ym.wd_data = old_porta; |
| 531 | |
| 532 | if (stat != UD.wpstat) { |
| 533 | DPRINT(( "wpstat[%d] = %d\n", drive, stat )); |
| 534 | UD.wpstat = stat; |
| 535 | set_bit (drive, &changed_floppies); |
| 536 | } |
| 537 | } |
| 538 | local_irq_restore(flags); |
| 539 | |
| 540 | start_check_change_timer(); |
| 541 | } |
| 542 | |
| 543 | |
| 544 | /* Handling of the Head Settling Flag: This flag should be set after each |
| 545 | * seek operation, because we don't use seeks with verify. |
| 546 | */ |
| 547 | |
| 548 | static inline void set_head_settle_flag(void) |
| 549 | { |
| 550 | HeadSettleFlag = FDCCMDADD_E; |
| 551 | } |
| 552 | |
| 553 | static inline int get_head_settle_flag(void) |
| 554 | { |
| 555 | int tmp = HeadSettleFlag; |
| 556 | HeadSettleFlag = 0; |
| 557 | return( tmp ); |
| 558 | } |
| 559 | |
| 560 | static inline void copy_buffer(void *from, void *to) |
| 561 | { |
| 562 | ulong *p1 = (ulong *)from, *p2 = (ulong *)to; |
| 563 | int cnt; |
| 564 | |
| 565 | for (cnt = 512/4; cnt; cnt--) |
| 566 | *p2++ = *p1++; |
| 567 | } |
| 568 | |
| 569 | |
| 570 | |
| 571 | |
| 572 | /* General Interrupt Handling */ |
| 573 | |
| 574 | static void (*FloppyIRQHandler)( int status ) = NULL; |
| 575 | |
| 576 | static irqreturn_t floppy_irq (int irq, void *dummy, struct pt_regs *fp) |
| 577 | { |
| 578 | unsigned char status; |
| 579 | void (*handler)( int ); |
| 580 | |
| 581 | handler = xchg(&FloppyIRQHandler, NULL); |
| 582 | |
| 583 | if (handler) { |
| 584 | nop(); |
| 585 | status = FDC_READ( FDCREG_STATUS ); |
| 586 | DPRINT(("FDC irq, status = %02x handler = %08lx\n",status,(unsigned long)handler)); |
| 587 | handler( status ); |
| 588 | } |
| 589 | else { |
| 590 | DPRINT(("FDC irq, no handler\n")); |
| 591 | } |
| 592 | return IRQ_HANDLED; |
| 593 | } |
| 594 | |
| 595 | |
| 596 | /* Error handling: If some error happened, retry some times, then |
| 597 | * recalibrate, then try again, and fail after MAX_ERRORS. |
| 598 | */ |
| 599 | |
| 600 | static void fd_error( void ) |
| 601 | { |
| 602 | if (IsFormatting) { |
| 603 | IsFormatting = 0; |
| 604 | FormatError = 1; |
| 605 | wake_up( &format_wait ); |
| 606 | return; |
| 607 | } |
| 608 | |
| 609 | if (!CURRENT) |
| 610 | return; |
| 611 | |
| 612 | CURRENT->errors++; |
| 613 | if (CURRENT->errors >= MAX_ERRORS) { |
| 614 | printk(KERN_ERR "fd%d: too many errors.\n", SelectedDrive ); |
| 615 | end_request(CURRENT, 0); |
| 616 | } |
| 617 | else if (CURRENT->errors == RECALIBRATE_ERRORS) { |
| 618 | printk(KERN_WARNING "fd%d: recalibrating\n", SelectedDrive ); |
| 619 | if (SelectedDrive != -1) |
| 620 | SUD.track = -1; |
| 621 | } |
| 622 | redo_fd_request(); |
| 623 | } |
| 624 | |
| 625 | |
| 626 | |
| 627 | #define SET_IRQ_HANDLER(proc) do { FloppyIRQHandler = (proc); } while(0) |
| 628 | |
| 629 | |
| 630 | /* ---------- Formatting ---------- */ |
| 631 | |
| 632 | #define FILL(n,val) \ |
| 633 | do { \ |
| 634 | memset( p, val, n ); \ |
| 635 | p += n; \ |
| 636 | } while(0) |
| 637 | |
| 638 | static int do_format(int drive, int type, struct atari_format_descr *desc) |
| 639 | { |
| 640 | unsigned char *p; |
| 641 | int sect, nsect; |
| 642 | unsigned long flags; |
| 643 | |
| 644 | DPRINT(("do_format( dr=%d tr=%d he=%d offs=%d )\n", |
| 645 | drive, desc->track, desc->head, desc->sect_offset )); |
| 646 | |
| 647 | local_irq_save(flags); |
| 648 | while( fdc_busy ) sleep_on( &fdc_wait ); |
| 649 | fdc_busy = 1; |
| 650 | stdma_lock(floppy_irq, NULL); |
| 651 | atari_turnon_irq( IRQ_MFP_FDC ); /* should be already, just to be sure */ |
| 652 | local_irq_restore(flags); |
| 653 | |
| 654 | if (type) { |
| 655 | if (--type >= NUM_DISK_MINORS || |
| 656 | minor2disktype[type].drive_types > DriveType) { |
| 657 | redo_fd_request(); |
| 658 | return -EINVAL; |
| 659 | } |
| 660 | type = minor2disktype[type].index; |
| 661 | UDT = &disk_type[type]; |
| 662 | } |
| 663 | |
| 664 | if (!UDT || desc->track >= UDT->blocks/UDT->spt/2 || desc->head >= 2) { |
| 665 | redo_fd_request(); |
| 666 | return -EINVAL; |
| 667 | } |
| 668 | |
| 669 | nsect = UDT->spt; |
| 670 | p = TrackBuffer; |
| 671 | /* The track buffer is used for the raw track data, so its |
| 672 | contents become invalid! */ |
| 673 | BufferDrive = -1; |
| 674 | /* stop deselect timer */ |
| 675 | del_timer( &motor_off_timer ); |
| 676 | |
| 677 | FILL( 60 * (nsect / 9), 0x4e ); |
| 678 | for( sect = 0; sect < nsect; ++sect ) { |
| 679 | FILL( 12, 0 ); |
| 680 | FILL( 3, 0xf5 ); |
| 681 | *p++ = 0xfe; |
| 682 | *p++ = desc->track; |
| 683 | *p++ = desc->head; |
| 684 | *p++ = (nsect + sect - desc->sect_offset) % nsect + 1; |
| 685 | *p++ = 2; |
| 686 | *p++ = 0xf7; |
| 687 | FILL( 22, 0x4e ); |
| 688 | FILL( 12, 0 ); |
| 689 | FILL( 3, 0xf5 ); |
| 690 | *p++ = 0xfb; |
| 691 | FILL( 512, 0xe5 ); |
| 692 | *p++ = 0xf7; |
| 693 | FILL( 40, 0x4e ); |
| 694 | } |
| 695 | FILL( TrackBuffer+BUFFER_SIZE-p, 0x4e ); |
| 696 | |
| 697 | IsFormatting = 1; |
| 698 | FormatError = 0; |
| 699 | ReqTrack = desc->track; |
| 700 | ReqSide = desc->head; |
| 701 | do_fd_action( drive ); |
| 702 | |
| 703 | sleep_on( &format_wait ); |
| 704 | |
| 705 | redo_fd_request(); |
| 706 | return( FormatError ? -EIO : 0 ); |
| 707 | } |
| 708 | |
| 709 | |
| 710 | /* do_fd_action() is the general procedure for a fd request: All |
| 711 | * required parameter settings (drive select, side select, track |
| 712 | * position) are checked and set if needed. For each of these |
| 713 | * parameters and the actual reading or writing exist two functions: |
| 714 | * one that starts the setting (or skips it if possible) and one |
| 715 | * callback for the "done" interrupt. Each done func calls the next |
| 716 | * set function to propagate the request down to fd_rwsec_done(). |
| 717 | */ |
| 718 | |
| 719 | static void do_fd_action( int drive ) |
| 720 | { |
| 721 | DPRINT(("do_fd_action\n")); |
| 722 | |
| 723 | if (UseTrackbuffer && !IsFormatting) { |
| 724 | repeat: |
| 725 | if (IS_BUFFERED( drive, ReqSide, ReqTrack )) { |
| 726 | if (ReqCmd == READ) { |
| 727 | copy_buffer( SECTOR_BUFFER(ReqSector), ReqData ); |
| 728 | if (++ReqCnt < CURRENT->current_nr_sectors) { |
| 729 | /* read next sector */ |
| 730 | setup_req_params( drive ); |
| 731 | goto repeat; |
| 732 | } |
| 733 | else { |
| 734 | /* all sectors finished */ |
| 735 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; |
| 736 | CURRENT->sector += CURRENT->current_nr_sectors; |
| 737 | end_request(CURRENT, 1); |
| 738 | redo_fd_request(); |
| 739 | return; |
| 740 | } |
| 741 | } |
| 742 | else { |
| 743 | /* cmd == WRITE, pay attention to track buffer |
| 744 | * consistency! */ |
| 745 | copy_buffer( ReqData, SECTOR_BUFFER(ReqSector) ); |
| 746 | } |
| 747 | } |
| 748 | } |
| 749 | |
| 750 | if (SelectedDrive != drive) |
| 751 | fd_select_drive( drive ); |
| 752 | |
| 753 | if (UD.track == -1) |
| 754 | fd_calibrate(); |
| 755 | else if (UD.track != ReqTrack << UDT->stretch) |
| 756 | fd_seek(); |
| 757 | else if (IsFormatting) |
| 758 | fd_writetrack(); |
| 759 | else |
| 760 | fd_rwsec(); |
| 761 | } |
| 762 | |
| 763 | |
| 764 | /* Seek to track 0 if the current track is unknown */ |
| 765 | |
| 766 | static void fd_calibrate( void ) |
| 767 | { |
| 768 | if (SUD.track >= 0) { |
| 769 | fd_calibrate_done( 0 ); |
| 770 | return; |
| 771 | } |
| 772 | |
| 773 | if (ATARIHW_PRESENT(FDCSPEED)) |
| 774 | dma_wd.fdc_speed = 0; /* always seek with 8 Mhz */; |
| 775 | DPRINT(("fd_calibrate\n")); |
| 776 | SET_IRQ_HANDLER( fd_calibrate_done ); |
| 777 | /* we can't verify, since the speed may be incorrect */ |
| 778 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | SUD.steprate ); |
| 779 | |
| 780 | NeedSeek = 1; |
| 781 | MotorOn = 1; |
| 782 | start_timeout(); |
| 783 | /* wait for IRQ */ |
| 784 | } |
| 785 | |
| 786 | |
| 787 | static void fd_calibrate_done( int status ) |
| 788 | { |
| 789 | DPRINT(("fd_calibrate_done()\n")); |
| 790 | stop_timeout(); |
| 791 | |
| 792 | /* set the correct speed now */ |
| 793 | if (ATARIHW_PRESENT(FDCSPEED)) |
| 794 | dma_wd.fdc_speed = SUDT->fdc_speed; |
| 795 | if (status & FDCSTAT_RECNF) { |
| 796 | printk(KERN_ERR "fd%d: restore failed\n", SelectedDrive ); |
| 797 | fd_error(); |
| 798 | } |
| 799 | else { |
| 800 | SUD.track = 0; |
| 801 | fd_seek(); |
| 802 | } |
| 803 | } |
| 804 | |
| 805 | |
| 806 | /* Seek the drive to the requested track. The drive must have been |
| 807 | * calibrated at some point before this. |
| 808 | */ |
| 809 | |
| 810 | static void fd_seek( void ) |
| 811 | { |
| 812 | if (SUD.track == ReqTrack << SUDT->stretch) { |
| 813 | fd_seek_done( 0 ); |
| 814 | return; |
| 815 | } |
| 816 | |
| 817 | if (ATARIHW_PRESENT(FDCSPEED)) { |
| 818 | dma_wd.fdc_speed = 0; /* always seek witch 8 Mhz */ |
| 819 | MFPDELAY(); |
| 820 | } |
| 821 | |
| 822 | DPRINT(("fd_seek() to track %d\n",ReqTrack)); |
| 823 | FDC_WRITE( FDCREG_DATA, ReqTrack << SUDT->stretch); |
| 824 | udelay(25); |
| 825 | SET_IRQ_HANDLER( fd_seek_done ); |
| 826 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK | SUD.steprate ); |
| 827 | |
| 828 | MotorOn = 1; |
| 829 | set_head_settle_flag(); |
| 830 | start_timeout(); |
| 831 | /* wait for IRQ */ |
| 832 | } |
| 833 | |
| 834 | |
| 835 | static void fd_seek_done( int status ) |
| 836 | { |
| 837 | DPRINT(("fd_seek_done()\n")); |
| 838 | stop_timeout(); |
| 839 | |
| 840 | /* set the correct speed */ |
| 841 | if (ATARIHW_PRESENT(FDCSPEED)) |
| 842 | dma_wd.fdc_speed = SUDT->fdc_speed; |
| 843 | if (status & FDCSTAT_RECNF) { |
| 844 | printk(KERN_ERR "fd%d: seek error (to track %d)\n", |
| 845 | SelectedDrive, ReqTrack ); |
| 846 | /* we don't know exactly which track we are on now! */ |
| 847 | SUD.track = -1; |
| 848 | fd_error(); |
| 849 | } |
| 850 | else { |
| 851 | SUD.track = ReqTrack << SUDT->stretch; |
| 852 | NeedSeek = 0; |
| 853 | if (IsFormatting) |
| 854 | fd_writetrack(); |
| 855 | else |
| 856 | fd_rwsec(); |
| 857 | } |
| 858 | } |
| 859 | |
| 860 | |
| 861 | /* This does the actual reading/writing after positioning the head |
| 862 | * over the correct track. |
| 863 | */ |
| 864 | |
| 865 | static int MultReadInProgress = 0; |
| 866 | |
| 867 | |
| 868 | static void fd_rwsec( void ) |
| 869 | { |
| 870 | unsigned long paddr, flags; |
| 871 | unsigned int rwflag, old_motoron; |
| 872 | unsigned int track; |
| 873 | |
| 874 | DPRINT(("fd_rwsec(), Sec=%d, Access=%c\n",ReqSector, ReqCmd == WRITE ? 'w' : 'r' )); |
| 875 | if (ReqCmd == WRITE) { |
| 876 | if (ATARIHW_PRESENT(EXTD_DMA)) { |
| 877 | paddr = virt_to_phys(ReqData); |
| 878 | } |
| 879 | else { |
| 880 | copy_buffer( ReqData, DMABuffer ); |
| 881 | paddr = PhysDMABuffer; |
| 882 | } |
| 883 | dma_cache_maintenance( paddr, 512, 1 ); |
| 884 | rwflag = 0x100; |
| 885 | } |
| 886 | else { |
| 887 | if (read_track) |
| 888 | paddr = PhysTrackBuffer; |
| 889 | else |
| 890 | paddr = ATARIHW_PRESENT(EXTD_DMA) ? |
| 891 | virt_to_phys(ReqData) : PhysDMABuffer; |
| 892 | rwflag = 0; |
| 893 | } |
| 894 | |
| 895 | fd_select_side( ReqSide ); |
| 896 | |
| 897 | /* Start sector of this operation */ |
| 898 | FDC_WRITE( FDCREG_SECTOR, read_track ? 1 : ReqSector ); |
| 899 | MFPDELAY(); |
| 900 | /* Cheat for track if stretch != 0 */ |
| 901 | if (SUDT->stretch) { |
| 902 | track = FDC_READ( FDCREG_TRACK); |
| 903 | MFPDELAY(); |
| 904 | FDC_WRITE( FDCREG_TRACK, track >> SUDT->stretch); |
| 905 | } |
| 906 | udelay(25); |
| 907 | |
| 908 | /* Setup DMA */ |
| 909 | local_irq_save(flags); |
| 910 | dma_wd.dma_lo = (unsigned char)paddr; |
| 911 | MFPDELAY(); |
| 912 | paddr >>= 8; |
| 913 | dma_wd.dma_md = (unsigned char)paddr; |
| 914 | MFPDELAY(); |
| 915 | paddr >>= 8; |
| 916 | if (ATARIHW_PRESENT(EXTD_DMA)) |
| 917 | st_dma_ext_dmahi = (unsigned short)paddr; |
| 918 | else |
| 919 | dma_wd.dma_hi = (unsigned char)paddr; |
| 920 | MFPDELAY(); |
| 921 | local_irq_restore(flags); |
| 922 | |
| 923 | /* Clear FIFO and switch DMA to correct mode */ |
| 924 | dma_wd.dma_mode_status = 0x90 | rwflag; |
| 925 | MFPDELAY(); |
| 926 | dma_wd.dma_mode_status = 0x90 | (rwflag ^ 0x100); |
| 927 | MFPDELAY(); |
| 928 | dma_wd.dma_mode_status = 0x90 | rwflag; |
| 929 | MFPDELAY(); |
| 930 | |
| 931 | /* How many sectors for DMA */ |
| 932 | dma_wd.fdc_acces_seccount = read_track ? SUDT->spt : 1; |
| 933 | |
| 934 | udelay(25); |
| 935 | |
| 936 | /* Start operation */ |
| 937 | dma_wd.dma_mode_status = FDCSELREG_STP | rwflag; |
| 938 | udelay(25); |
| 939 | SET_IRQ_HANDLER( fd_rwsec_done ); |
| 940 | dma_wd.fdc_acces_seccount = |
| 941 | (get_head_settle_flag() | |
| 942 | (rwflag ? FDCCMD_WRSEC : (FDCCMD_RDSEC | (read_track ? FDCCMDADD_M : 0)))); |
| 943 | |
| 944 | old_motoron = MotorOn; |
| 945 | MotorOn = 1; |
| 946 | NeedSeek = 1; |
| 947 | /* wait for interrupt */ |
| 948 | |
| 949 | if (read_track) { |
| 950 | /* If reading a whole track, wait about one disk rotation and |
| 951 | * then check if all sectors are read. The FDC will even |
| 952 | * search for the first non-existent sector and need 1 sec to |
| 953 | * recognise that it isn't present :-( |
| 954 | */ |
| 955 | MultReadInProgress = 1; |
| 956 | mod_timer(&readtrack_timer, |
| 957 | /* 1 rot. + 5 rot.s if motor was off */ |
| 958 | jiffies + HZ/5 + (old_motoron ? 0 : HZ)); |
| 959 | } |
| 960 | start_timeout(); |
| 961 | } |
| 962 | |
| 963 | |
| 964 | static void fd_readtrack_check( unsigned long dummy ) |
| 965 | { |
| 966 | unsigned long flags, addr, addr2; |
| 967 | |
| 968 | local_irq_save(flags); |
| 969 | |
| 970 | if (!MultReadInProgress) { |
| 971 | /* This prevents a race condition that could arise if the |
| 972 | * interrupt is triggered while the calling of this timer |
| 973 | * callback function takes place. The IRQ function then has |
| 974 | * already cleared 'MultReadInProgress' when flow of control |
| 975 | * gets here. |
| 976 | */ |
| 977 | local_irq_restore(flags); |
| 978 | return; |
| 979 | } |
| 980 | |
| 981 | /* get the current DMA address */ |
| 982 | /* ++ f.a. read twice to avoid being fooled by switcher */ |
| 983 | addr = 0; |
| 984 | do { |
| 985 | addr2 = addr; |
| 986 | addr = dma_wd.dma_lo & 0xff; |
| 987 | MFPDELAY(); |
| 988 | addr |= (dma_wd.dma_md & 0xff) << 8; |
| 989 | MFPDELAY(); |
| 990 | if (ATARIHW_PRESENT( EXTD_DMA )) |
| 991 | addr |= (st_dma_ext_dmahi & 0xffff) << 16; |
| 992 | else |
| 993 | addr |= (dma_wd.dma_hi & 0xff) << 16; |
| 994 | MFPDELAY(); |
| 995 | } while(addr != addr2); |
| 996 | |
| 997 | if (addr >= PhysTrackBuffer + SUDT->spt*512) { |
| 998 | /* already read enough data, force an FDC interrupt to stop |
| 999 | * the read operation |
| 1000 | */ |
| 1001 | SET_IRQ_HANDLER( NULL ); |
| 1002 | MultReadInProgress = 0; |
| 1003 | local_irq_restore(flags); |
| 1004 | DPRINT(("fd_readtrack_check(): done\n")); |
| 1005 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
| 1006 | udelay(25); |
| 1007 | |
| 1008 | /* No error until now -- the FDC would have interrupted |
| 1009 | * otherwise! |
| 1010 | */ |
| 1011 | fd_rwsec_done1(0); |
| 1012 | } |
| 1013 | else { |
| 1014 | /* not yet finished, wait another tenth rotation */ |
| 1015 | local_irq_restore(flags); |
| 1016 | DPRINT(("fd_readtrack_check(): not yet finished\n")); |
| 1017 | mod_timer(&readtrack_timer, jiffies + HZ/5/10); |
| 1018 | } |
| 1019 | } |
| 1020 | |
| 1021 | |
| 1022 | static void fd_rwsec_done( int status ) |
| 1023 | { |
| 1024 | DPRINT(("fd_rwsec_done()\n")); |
| 1025 | |
| 1026 | if (read_track) { |
| 1027 | del_timer(&readtrack_timer); |
| 1028 | if (!MultReadInProgress) |
| 1029 | return; |
| 1030 | MultReadInProgress = 0; |
| 1031 | } |
| 1032 | fd_rwsec_done1(status); |
| 1033 | } |
| 1034 | |
| 1035 | static void fd_rwsec_done1(int status) |
| 1036 | { |
| 1037 | unsigned int track; |
| 1038 | |
| 1039 | stop_timeout(); |
| 1040 | |
| 1041 | /* Correct the track if stretch != 0 */ |
| 1042 | if (SUDT->stretch) { |
| 1043 | track = FDC_READ( FDCREG_TRACK); |
| 1044 | MFPDELAY(); |
| 1045 | FDC_WRITE( FDCREG_TRACK, track << SUDT->stretch); |
| 1046 | } |
| 1047 | |
| 1048 | if (!UseTrackbuffer) { |
| 1049 | dma_wd.dma_mode_status = 0x90; |
| 1050 | MFPDELAY(); |
| 1051 | if (!(dma_wd.dma_mode_status & 0x01)) { |
| 1052 | printk(KERN_ERR "fd%d: DMA error\n", SelectedDrive ); |
| 1053 | goto err_end; |
| 1054 | } |
| 1055 | } |
| 1056 | MFPDELAY(); |
| 1057 | |
| 1058 | if (ReqCmd == WRITE && (status & FDCSTAT_WPROT)) { |
| 1059 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); |
| 1060 | goto err_end; |
| 1061 | } |
| 1062 | if ((status & FDCSTAT_RECNF) && |
| 1063 | /* RECNF is no error after a multiple read when the FDC |
| 1064 | searched for a non-existent sector! */ |
| 1065 | !(read_track && FDC_READ(FDCREG_SECTOR) > SUDT->spt)) { |
| 1066 | if (Probing) { |
| 1067 | if (SUDT > disk_type) { |
| 1068 | if (SUDT[-1].blocks > ReqBlock) { |
| 1069 | /* try another disk type */ |
| 1070 | SUDT--; |
| 1071 | set_capacity(unit[SelectedDrive].disk, |
| 1072 | SUDT->blocks); |
| 1073 | } else |
| 1074 | Probing = 0; |
| 1075 | } |
| 1076 | else { |
| 1077 | if (SUD.flags & FTD_MSG) |
| 1078 | printk(KERN_INFO "fd%d: Auto-detected floppy type %s\n", |
| 1079 | SelectedDrive, SUDT->name ); |
| 1080 | Probing=0; |
| 1081 | } |
| 1082 | } else { |
| 1083 | /* record not found, but not probing. Maybe stretch wrong ? Restart probing */ |
| 1084 | if (SUD.autoprobe) { |
| 1085 | SUDT = disk_type + StartDiskType[DriveType]; |
| 1086 | set_capacity(unit[SelectedDrive].disk, |
| 1087 | SUDT->blocks); |
| 1088 | Probing = 1; |
| 1089 | } |
| 1090 | } |
| 1091 | if (Probing) { |
| 1092 | if (ATARIHW_PRESENT(FDCSPEED)) { |
| 1093 | dma_wd.fdc_speed = SUDT->fdc_speed; |
| 1094 | MFPDELAY(); |
| 1095 | } |
| 1096 | setup_req_params( SelectedDrive ); |
| 1097 | BufferDrive = -1; |
| 1098 | do_fd_action( SelectedDrive ); |
| 1099 | return; |
| 1100 | } |
| 1101 | |
| 1102 | printk(KERN_ERR "fd%d: sector %d not found (side %d, track %d)\n", |
| 1103 | SelectedDrive, FDC_READ (FDCREG_SECTOR), ReqSide, ReqTrack ); |
| 1104 | goto err_end; |
| 1105 | } |
| 1106 | if (status & FDCSTAT_CRC) { |
| 1107 | printk(KERN_ERR "fd%d: CRC error (side %d, track %d, sector %d)\n", |
| 1108 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); |
| 1109 | goto err_end; |
| 1110 | } |
| 1111 | if (status & FDCSTAT_LOST) { |
| 1112 | printk(KERN_ERR "fd%d: lost data (side %d, track %d, sector %d)\n", |
| 1113 | SelectedDrive, ReqSide, ReqTrack, FDC_READ (FDCREG_SECTOR) ); |
| 1114 | goto err_end; |
| 1115 | } |
| 1116 | |
| 1117 | Probing = 0; |
| 1118 | |
| 1119 | if (ReqCmd == READ) { |
| 1120 | if (!read_track) { |
| 1121 | void *addr; |
| 1122 | addr = ATARIHW_PRESENT( EXTD_DMA ) ? ReqData : DMABuffer; |
| 1123 | dma_cache_maintenance( virt_to_phys(addr), 512, 0 ); |
| 1124 | if (!ATARIHW_PRESENT( EXTD_DMA )) |
| 1125 | copy_buffer (addr, ReqData); |
| 1126 | } else { |
| 1127 | dma_cache_maintenance( PhysTrackBuffer, MaxSectors[DriveType] * 512, 0 ); |
| 1128 | BufferDrive = SelectedDrive; |
| 1129 | BufferSide = ReqSide; |
| 1130 | BufferTrack = ReqTrack; |
| 1131 | copy_buffer (SECTOR_BUFFER (ReqSector), ReqData); |
| 1132 | } |
| 1133 | } |
| 1134 | |
| 1135 | if (++ReqCnt < CURRENT->current_nr_sectors) { |
| 1136 | /* read next sector */ |
| 1137 | setup_req_params( SelectedDrive ); |
| 1138 | do_fd_action( SelectedDrive ); |
| 1139 | } |
| 1140 | else { |
| 1141 | /* all sectors finished */ |
| 1142 | CURRENT->nr_sectors -= CURRENT->current_nr_sectors; |
| 1143 | CURRENT->sector += CURRENT->current_nr_sectors; |
| 1144 | end_request(CURRENT, 1); |
| 1145 | redo_fd_request(); |
| 1146 | } |
| 1147 | return; |
| 1148 | |
| 1149 | err_end: |
| 1150 | BufferDrive = -1; |
| 1151 | fd_error(); |
| 1152 | } |
| 1153 | |
| 1154 | |
| 1155 | static void fd_writetrack( void ) |
| 1156 | { |
| 1157 | unsigned long paddr, flags; |
| 1158 | unsigned int track; |
| 1159 | |
| 1160 | DPRINT(("fd_writetrack() Tr=%d Si=%d\n", ReqTrack, ReqSide )); |
| 1161 | |
| 1162 | paddr = PhysTrackBuffer; |
| 1163 | dma_cache_maintenance( paddr, BUFFER_SIZE, 1 ); |
| 1164 | |
| 1165 | fd_select_side( ReqSide ); |
| 1166 | |
| 1167 | /* Cheat for track if stretch != 0 */ |
| 1168 | if (SUDT->stretch) { |
| 1169 | track = FDC_READ( FDCREG_TRACK); |
| 1170 | MFPDELAY(); |
| 1171 | FDC_WRITE(FDCREG_TRACK,track >> SUDT->stretch); |
| 1172 | } |
| 1173 | udelay(40); |
| 1174 | |
| 1175 | /* Setup DMA */ |
| 1176 | local_irq_save(flags); |
| 1177 | dma_wd.dma_lo = (unsigned char)paddr; |
| 1178 | MFPDELAY(); |
| 1179 | paddr >>= 8; |
| 1180 | dma_wd.dma_md = (unsigned char)paddr; |
| 1181 | MFPDELAY(); |
| 1182 | paddr >>= 8; |
| 1183 | if (ATARIHW_PRESENT( EXTD_DMA )) |
| 1184 | st_dma_ext_dmahi = (unsigned short)paddr; |
| 1185 | else |
| 1186 | dma_wd.dma_hi = (unsigned char)paddr; |
| 1187 | MFPDELAY(); |
| 1188 | local_irq_restore(flags); |
| 1189 | |
| 1190 | /* Clear FIFO and switch DMA to correct mode */ |
| 1191 | dma_wd.dma_mode_status = 0x190; |
| 1192 | MFPDELAY(); |
| 1193 | dma_wd.dma_mode_status = 0x90; |
| 1194 | MFPDELAY(); |
| 1195 | dma_wd.dma_mode_status = 0x190; |
| 1196 | MFPDELAY(); |
| 1197 | |
| 1198 | /* How many sectors for DMA */ |
| 1199 | dma_wd.fdc_acces_seccount = BUFFER_SIZE/512; |
| 1200 | udelay(40); |
| 1201 | |
| 1202 | /* Start operation */ |
| 1203 | dma_wd.dma_mode_status = FDCSELREG_STP | 0x100; |
| 1204 | udelay(40); |
| 1205 | SET_IRQ_HANDLER( fd_writetrack_done ); |
| 1206 | dma_wd.fdc_acces_seccount = FDCCMD_WRTRA | get_head_settle_flag(); |
| 1207 | |
| 1208 | MotorOn = 1; |
| 1209 | start_timeout(); |
| 1210 | /* wait for interrupt */ |
| 1211 | } |
| 1212 | |
| 1213 | |
| 1214 | static void fd_writetrack_done( int status ) |
| 1215 | { |
| 1216 | DPRINT(("fd_writetrack_done()\n")); |
| 1217 | |
| 1218 | stop_timeout(); |
| 1219 | |
| 1220 | if (status & FDCSTAT_WPROT) { |
| 1221 | printk(KERN_NOTICE "fd%d: is write protected\n", SelectedDrive ); |
| 1222 | goto err_end; |
| 1223 | } |
| 1224 | if (status & FDCSTAT_LOST) { |
| 1225 | printk(KERN_ERR "fd%d: lost data (side %d, track %d)\n", |
| 1226 | SelectedDrive, ReqSide, ReqTrack ); |
| 1227 | goto err_end; |
| 1228 | } |
| 1229 | |
| 1230 | wake_up( &format_wait ); |
| 1231 | return; |
| 1232 | |
| 1233 | err_end: |
| 1234 | fd_error(); |
| 1235 | } |
| 1236 | |
| 1237 | static void fd_times_out( unsigned long dummy ) |
| 1238 | { |
| 1239 | atari_disable_irq( IRQ_MFP_FDC ); |
| 1240 | if (!FloppyIRQHandler) goto end; /* int occurred after timer was fired, but |
| 1241 | * before we came here... */ |
| 1242 | |
| 1243 | SET_IRQ_HANDLER( NULL ); |
| 1244 | /* If the timeout occurred while the readtrack_check timer was |
| 1245 | * active, we need to cancel it, else bad things will happen */ |
| 1246 | if (UseTrackbuffer) |
| 1247 | del_timer( &readtrack_timer ); |
| 1248 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
| 1249 | udelay( 25 ); |
| 1250 | |
| 1251 | printk(KERN_ERR "floppy timeout\n" ); |
| 1252 | fd_error(); |
| 1253 | end: |
| 1254 | atari_enable_irq( IRQ_MFP_FDC ); |
| 1255 | } |
| 1256 | |
| 1257 | |
| 1258 | /* The (noop) seek operation here is needed to make the WP bit in the |
| 1259 | * FDC status register accessible for check_change. If the last disk |
| 1260 | * operation would have been a RDSEC, this bit would always read as 0 |
| 1261 | * no matter what :-( To save time, the seek goes to the track we're |
| 1262 | * already on. |
| 1263 | */ |
| 1264 | |
| 1265 | static void finish_fdc( void ) |
| 1266 | { |
| 1267 | if (!NeedSeek) { |
| 1268 | finish_fdc_done( 0 ); |
| 1269 | } |
| 1270 | else { |
| 1271 | DPRINT(("finish_fdc: dummy seek started\n")); |
| 1272 | FDC_WRITE (FDCREG_DATA, SUD.track); |
| 1273 | SET_IRQ_HANDLER( finish_fdc_done ); |
| 1274 | FDC_WRITE (FDCREG_CMD, FDCCMD_SEEK); |
| 1275 | MotorOn = 1; |
| 1276 | start_timeout(); |
| 1277 | /* we must wait for the IRQ here, because the ST-DMA |
| 1278 | is released immediately afterwards and the interrupt |
| 1279 | may be delivered to the wrong driver. */ |
| 1280 | } |
| 1281 | } |
| 1282 | |
| 1283 | |
| 1284 | static void finish_fdc_done( int dummy ) |
| 1285 | { |
| 1286 | unsigned long flags; |
| 1287 | |
| 1288 | DPRINT(("finish_fdc_done entered\n")); |
| 1289 | stop_timeout(); |
| 1290 | NeedSeek = 0; |
| 1291 | |
| 1292 | if (timer_pending(&fd_timer) && time_before(fd_timer.expires, jiffies + 5)) |
| 1293 | /* If the check for a disk change is done too early after this |
| 1294 | * last seek command, the WP bit still reads wrong :-(( |
| 1295 | */ |
| 1296 | mod_timer(&fd_timer, jiffies + 5); |
| 1297 | else |
| 1298 | start_check_change_timer(); |
| 1299 | start_motor_off_timer(); |
| 1300 | |
| 1301 | local_irq_save(flags); |
| 1302 | stdma_release(); |
| 1303 | fdc_busy = 0; |
| 1304 | wake_up( &fdc_wait ); |
| 1305 | local_irq_restore(flags); |
| 1306 | |
| 1307 | DPRINT(("finish_fdc() finished\n")); |
| 1308 | } |
| 1309 | |
| 1310 | /* The detection of disk changes is a dark chapter in Atari history :-( |
| 1311 | * Because the "Drive ready" signal isn't present in the Atari |
| 1312 | * hardware, one has to rely on the "Write Protect". This works fine, |
| 1313 | * as long as no write protected disks are used. TOS solves this |
| 1314 | * problem by introducing tri-state logic ("maybe changed") and |
| 1315 | * looking at the serial number in block 0. This isn't possible for |
| 1316 | * Linux, since the floppy driver can't make assumptions about the |
| 1317 | * filesystem used on the disk and thus the contents of block 0. I've |
| 1318 | * chosen the method to always say "The disk was changed" if it is |
| 1319 | * unsure whether it was. This implies that every open or mount |
| 1320 | * invalidates the disk buffers if you work with write protected |
| 1321 | * disks. But at least this is better than working with incorrect data |
| 1322 | * due to unrecognised disk changes. |
| 1323 | */ |
| 1324 | |
| 1325 | static int check_floppy_change(struct gendisk *disk) |
| 1326 | { |
| 1327 | struct atari_floppy_struct *p = disk->private_data; |
| 1328 | unsigned int drive = p - unit; |
| 1329 | if (test_bit (drive, &fake_change)) { |
| 1330 | /* simulated change (e.g. after formatting) */ |
| 1331 | return 1; |
| 1332 | } |
| 1333 | if (test_bit (drive, &changed_floppies)) { |
| 1334 | /* surely changed (the WP signal changed at least once) */ |
| 1335 | return 1; |
| 1336 | } |
| 1337 | if (UD.wpstat) { |
| 1338 | /* WP is on -> could be changed: to be sure, buffers should be |
| 1339 | * invalidated... |
| 1340 | */ |
| 1341 | return 1; |
| 1342 | } |
| 1343 | |
| 1344 | return 0; |
| 1345 | } |
| 1346 | |
| 1347 | static int floppy_revalidate(struct gendisk *disk) |
| 1348 | { |
| 1349 | struct atari_floppy_struct *p = disk->private_data; |
| 1350 | unsigned int drive = p - unit; |
| 1351 | |
| 1352 | if (test_bit(drive, &changed_floppies) || |
| 1353 | test_bit(drive, &fake_change) || |
| 1354 | p->disktype == 0) { |
| 1355 | if (UD.flags & FTD_MSG) |
| 1356 | printk(KERN_ERR "floppy: clear format %p!\n", UDT); |
| 1357 | BufferDrive = -1; |
| 1358 | clear_bit(drive, &fake_change); |
| 1359 | clear_bit(drive, &changed_floppies); |
| 1360 | /* MSch: clearing geometry makes sense only for autoprobe |
| 1361 | formats, for 'permanent user-defined' parameter: |
| 1362 | restore default_params[] here if flagged valid! */ |
| 1363 | if (default_params[drive].blocks == 0) |
| 1364 | UDT = 0; |
| 1365 | else |
| 1366 | UDT = &default_params[drive]; |
| 1367 | } |
| 1368 | return 0; |
| 1369 | } |
| 1370 | |
| 1371 | |
| 1372 | /* This sets up the global variables describing the current request. */ |
| 1373 | |
| 1374 | static void setup_req_params( int drive ) |
| 1375 | { |
| 1376 | int block = ReqBlock + ReqCnt; |
| 1377 | |
| 1378 | ReqTrack = block / UDT->spt; |
| 1379 | ReqSector = block - ReqTrack * UDT->spt + 1; |
| 1380 | ReqSide = ReqTrack & 1; |
| 1381 | ReqTrack >>= 1; |
| 1382 | ReqData = ReqBuffer + 512 * ReqCnt; |
| 1383 | |
| 1384 | if (UseTrackbuffer) |
| 1385 | read_track = (ReqCmd == READ && CURRENT->errors == 0); |
| 1386 | else |
| 1387 | read_track = 0; |
| 1388 | |
| 1389 | DPRINT(("Request params: Si=%d Tr=%d Se=%d Data=%08lx\n",ReqSide, |
| 1390 | ReqTrack, ReqSector, (unsigned long)ReqData )); |
| 1391 | } |
| 1392 | |
| 1393 | |
| 1394 | static void redo_fd_request(void) |
| 1395 | { |
| 1396 | int drive, type; |
| 1397 | struct atari_floppy_struct *floppy; |
| 1398 | |
| 1399 | DPRINT(("redo_fd_request: CURRENT=%p dev=%s CURRENT->sector=%ld\n", |
| 1400 | CURRENT, CURRENT ? CURRENT->rq_disk->disk_name : "", |
| 1401 | CURRENT ? CURRENT->sector : 0 )); |
| 1402 | |
| 1403 | IsFormatting = 0; |
| 1404 | |
| 1405 | repeat: |
| 1406 | |
| 1407 | if (!CURRENT) |
| 1408 | goto the_end; |
| 1409 | |
| 1410 | floppy = CURRENT->rq_disk->private_data; |
| 1411 | drive = floppy - unit; |
| 1412 | type = floppy->type; |
| 1413 | |
| 1414 | if (!UD.connected) { |
| 1415 | /* drive not connected */ |
| 1416 | printk(KERN_ERR "Unknown Device: fd%d\n", drive ); |
| 1417 | end_request(CURRENT, 0); |
| 1418 | goto repeat; |
| 1419 | } |
| 1420 | |
| 1421 | if (type == 0) { |
| 1422 | if (!UDT) { |
| 1423 | Probing = 1; |
| 1424 | UDT = disk_type + StartDiskType[DriveType]; |
| 1425 | set_capacity(floppy->disk, UDT->blocks); |
| 1426 | UD.autoprobe = 1; |
| 1427 | } |
| 1428 | } |
| 1429 | else { |
| 1430 | /* user supplied disk type */ |
| 1431 | if (--type >= NUM_DISK_MINORS) { |
| 1432 | printk(KERN_WARNING "fd%d: invalid disk format", drive ); |
| 1433 | end_request(CURRENT, 0); |
| 1434 | goto repeat; |
| 1435 | } |
| 1436 | if (minor2disktype[type].drive_types > DriveType) { |
| 1437 | printk(KERN_WARNING "fd%d: unsupported disk format", drive ); |
| 1438 | end_request(CURRENT, 0); |
| 1439 | goto repeat; |
| 1440 | } |
| 1441 | type = minor2disktype[type].index; |
| 1442 | UDT = &disk_type[type]; |
| 1443 | set_capacity(floppy->disk, UDT->blocks); |
| 1444 | UD.autoprobe = 0; |
| 1445 | } |
| 1446 | |
| 1447 | if (CURRENT->sector + 1 > UDT->blocks) { |
| 1448 | end_request(CURRENT, 0); |
| 1449 | goto repeat; |
| 1450 | } |
| 1451 | |
| 1452 | /* stop deselect timer */ |
| 1453 | del_timer( &motor_off_timer ); |
| 1454 | |
| 1455 | ReqCnt = 0; |
| 1456 | ReqCmd = rq_data_dir(CURRENT); |
| 1457 | ReqBlock = CURRENT->sector; |
| 1458 | ReqBuffer = CURRENT->buffer; |
| 1459 | setup_req_params( drive ); |
| 1460 | do_fd_action( drive ); |
| 1461 | |
| 1462 | return; |
| 1463 | |
| 1464 | the_end: |
| 1465 | finish_fdc(); |
| 1466 | } |
| 1467 | |
| 1468 | |
| 1469 | void do_fd_request(request_queue_t * q) |
| 1470 | { |
| 1471 | unsigned long flags; |
| 1472 | |
| 1473 | DPRINT(("do_fd_request for pid %d\n",current->pid)); |
| 1474 | while( fdc_busy ) sleep_on( &fdc_wait ); |
| 1475 | fdc_busy = 1; |
| 1476 | stdma_lock(floppy_irq, NULL); |
| 1477 | |
| 1478 | atari_disable_irq( IRQ_MFP_FDC ); |
| 1479 | local_save_flags(flags); /* The request function is called with ints |
| 1480 | local_irq_disable(); * disabled... so must save the IPL for later */ |
| 1481 | redo_fd_request(); |
| 1482 | local_irq_restore(flags); |
| 1483 | atari_enable_irq( IRQ_MFP_FDC ); |
| 1484 | } |
| 1485 | |
| 1486 | static int fd_ioctl(struct inode *inode, struct file *filp, |
| 1487 | unsigned int cmd, unsigned long param) |
| 1488 | { |
| 1489 | struct gendisk *disk = inode->i_bdev->bd_disk; |
| 1490 | struct atari_floppy_struct *floppy = disk->private_data; |
| 1491 | int drive = floppy - unit; |
| 1492 | int type = floppy->type; |
| 1493 | struct atari_format_descr fmt_desc; |
| 1494 | struct atari_disk_type *dtp; |
| 1495 | struct floppy_struct getprm; |
| 1496 | int settype; |
| 1497 | struct floppy_struct setprm; |
| 1498 | |
| 1499 | switch (cmd) { |
| 1500 | case FDGETPRM: |
| 1501 | if (type) { |
| 1502 | if (--type >= NUM_DISK_MINORS) |
| 1503 | return -ENODEV; |
| 1504 | if (minor2disktype[type].drive_types > DriveType) |
| 1505 | return -ENODEV; |
| 1506 | type = minor2disktype[type].index; |
| 1507 | dtp = &disk_type[type]; |
| 1508 | if (UD.flags & FTD_MSG) |
| 1509 | printk (KERN_ERR "floppy%d: found dtp %p name %s!\n", |
| 1510 | drive, dtp, dtp->name); |
| 1511 | } |
| 1512 | else { |
| 1513 | if (!UDT) |
| 1514 | return -ENXIO; |
| 1515 | else |
| 1516 | dtp = UDT; |
| 1517 | } |
| 1518 | memset((void *)&getprm, 0, sizeof(getprm)); |
| 1519 | getprm.size = dtp->blocks; |
| 1520 | getprm.sect = dtp->spt; |
| 1521 | getprm.head = 2; |
| 1522 | getprm.track = dtp->blocks/dtp->spt/2; |
| 1523 | getprm.stretch = dtp->stretch; |
| 1524 | if (copy_to_user((void *)param, &getprm, sizeof(getprm))) |
| 1525 | return -EFAULT; |
| 1526 | return 0; |
| 1527 | } |
| 1528 | switch (cmd) { |
| 1529 | case FDSETPRM: |
| 1530 | case FDDEFPRM: |
| 1531 | /* |
| 1532 | * MSch 7/96: simple 'set geometry' case: just set the |
| 1533 | * 'default' device params (minor == 0). |
| 1534 | * Currently, the drive geometry is cleared after each |
| 1535 | * disk change and subsequent revalidate()! simple |
| 1536 | * implementation of FDDEFPRM: save geometry from a |
| 1537 | * FDDEFPRM call and restore it in floppy_revalidate() ! |
| 1538 | */ |
| 1539 | |
| 1540 | /* get the parameters from user space */ |
| 1541 | if (floppy->ref != 1 && floppy->ref != -1) |
| 1542 | return -EBUSY; |
| 1543 | if (copy_from_user(&setprm, (void *) param, sizeof(setprm))) |
| 1544 | return -EFAULT; |
| 1545 | /* |
| 1546 | * first of all: check for floppy change and revalidate, |
| 1547 | * or the next access will revalidate - and clear UDT :-( |
| 1548 | */ |
| 1549 | |
| 1550 | if (check_floppy_change(disk)) |
| 1551 | floppy_revalidate(disk); |
| 1552 | |
| 1553 | if (UD.flags & FTD_MSG) |
| 1554 | printk (KERN_INFO "floppy%d: setting size %d spt %d str %d!\n", |
| 1555 | drive, setprm.size, setprm.sect, setprm.stretch); |
| 1556 | |
| 1557 | /* what if type > 0 here? Overwrite specified entry ? */ |
| 1558 | if (type) { |
| 1559 | /* refuse to re-set a predefined type for now */ |
| 1560 | redo_fd_request(); |
| 1561 | return -EINVAL; |
| 1562 | } |
| 1563 | |
| 1564 | /* |
| 1565 | * type == 0: first look for a matching entry in the type list, |
| 1566 | * and set the UD.disktype field to use the perdefined entry. |
| 1567 | * TODO: add user-defined format to head of autoprobe list ? |
| 1568 | * Useful to include the user-type for future autodetection! |
| 1569 | */ |
| 1570 | |
| 1571 | for (settype = 0; settype < NUM_DISK_MINORS; settype++) { |
| 1572 | int setidx = 0; |
| 1573 | if (minor2disktype[settype].drive_types > DriveType) { |
| 1574 | /* skip this one, invalid for drive ... */ |
| 1575 | continue; |
| 1576 | } |
| 1577 | setidx = minor2disktype[settype].index; |
| 1578 | dtp = &disk_type[setidx]; |
| 1579 | |
| 1580 | /* found matching entry ?? */ |
| 1581 | if ( dtp->blocks == setprm.size |
| 1582 | && dtp->spt == setprm.sect |
| 1583 | && dtp->stretch == setprm.stretch ) { |
| 1584 | if (UD.flags & FTD_MSG) |
| 1585 | printk (KERN_INFO "floppy%d: setting %s %p!\n", |
| 1586 | drive, dtp->name, dtp); |
| 1587 | UDT = dtp; |
| 1588 | set_capacity(floppy->disk, UDT->blocks); |
| 1589 | |
| 1590 | if (cmd == FDDEFPRM) { |
| 1591 | /* save settings as permanent default type */ |
| 1592 | default_params[drive].name = dtp->name; |
| 1593 | default_params[drive].spt = dtp->spt; |
| 1594 | default_params[drive].blocks = dtp->blocks; |
| 1595 | default_params[drive].fdc_speed = dtp->fdc_speed; |
| 1596 | default_params[drive].stretch = dtp->stretch; |
| 1597 | } |
| 1598 | |
| 1599 | return 0; |
| 1600 | } |
| 1601 | |
| 1602 | } |
| 1603 | |
| 1604 | /* no matching disk type found above - setting user_params */ |
| 1605 | |
| 1606 | if (cmd == FDDEFPRM) { |
| 1607 | /* set permanent type */ |
| 1608 | dtp = &default_params[drive]; |
| 1609 | } else |
| 1610 | /* set user type (reset by disk change!) */ |
| 1611 | dtp = &user_params[drive]; |
| 1612 | |
| 1613 | dtp->name = "user format"; |
| 1614 | dtp->blocks = setprm.size; |
| 1615 | dtp->spt = setprm.sect; |
| 1616 | if (setprm.sect > 14) |
| 1617 | dtp->fdc_speed = 3; |
| 1618 | else |
| 1619 | dtp->fdc_speed = 0; |
| 1620 | dtp->stretch = setprm.stretch; |
| 1621 | |
| 1622 | if (UD.flags & FTD_MSG) |
| 1623 | printk (KERN_INFO "floppy%d: blk %d spt %d str %d!\n", |
| 1624 | drive, dtp->blocks, dtp->spt, dtp->stretch); |
| 1625 | |
| 1626 | /* sanity check */ |
| 1627 | if (!dtp || setprm.track != dtp->blocks/dtp->spt/2 || |
| 1628 | setprm.head != 2) { |
| 1629 | redo_fd_request(); |
| 1630 | return -EINVAL; |
| 1631 | } |
| 1632 | |
| 1633 | UDT = dtp; |
| 1634 | set_capacity(floppy->disk, UDT->blocks); |
| 1635 | |
| 1636 | return 0; |
| 1637 | case FDMSGON: |
| 1638 | UD.flags |= FTD_MSG; |
| 1639 | return 0; |
| 1640 | case FDMSGOFF: |
| 1641 | UD.flags &= ~FTD_MSG; |
| 1642 | return 0; |
| 1643 | case FDSETEMSGTRESH: |
| 1644 | return -EINVAL; |
| 1645 | case FDFMTBEG: |
| 1646 | return 0; |
| 1647 | case FDFMTTRK: |
| 1648 | if (floppy->ref != 1 && floppy->ref != -1) |
| 1649 | return -EBUSY; |
| 1650 | if (copy_from_user(&fmt_desc, (void *) param, sizeof(fmt_desc))) |
| 1651 | return -EFAULT; |
| 1652 | return do_format(drive, type, &fmt_desc); |
| 1653 | case FDCLRPRM: |
| 1654 | UDT = NULL; |
| 1655 | /* MSch: invalidate default_params */ |
| 1656 | default_params[drive].blocks = 0; |
| 1657 | set_capacity(floppy->disk, MAX_DISK_SIZE * 2); |
| 1658 | case FDFMTEND: |
| 1659 | case FDFLUSH: |
| 1660 | /* invalidate the buffer track to force a reread */ |
| 1661 | BufferDrive = -1; |
| 1662 | set_bit(drive, &fake_change); |
| 1663 | check_disk_change(inode->i_bdev); |
| 1664 | return 0; |
| 1665 | default: |
| 1666 | return -EINVAL; |
| 1667 | } |
| 1668 | } |
| 1669 | |
| 1670 | |
| 1671 | /* Initialize the 'unit' variable for drive 'drive' */ |
| 1672 | |
| 1673 | static void __init fd_probe( int drive ) |
| 1674 | { |
| 1675 | UD.connected = 0; |
| 1676 | UDT = NULL; |
| 1677 | |
| 1678 | if (!fd_test_drive_present( drive )) |
| 1679 | return; |
| 1680 | |
| 1681 | UD.connected = 1; |
| 1682 | UD.track = 0; |
| 1683 | switch( UserSteprate[drive] ) { |
| 1684 | case 2: |
| 1685 | UD.steprate = FDCSTEP_2; |
| 1686 | break; |
| 1687 | case 3: |
| 1688 | UD.steprate = FDCSTEP_3; |
| 1689 | break; |
| 1690 | case 6: |
| 1691 | UD.steprate = FDCSTEP_6; |
| 1692 | break; |
| 1693 | case 12: |
| 1694 | UD.steprate = FDCSTEP_12; |
| 1695 | break; |
| 1696 | default: /* should be -1 for "not set by user" */ |
| 1697 | if (ATARIHW_PRESENT( FDCSPEED ) || MACH_IS_MEDUSA) |
| 1698 | UD.steprate = FDCSTEP_3; |
| 1699 | else |
| 1700 | UD.steprate = FDCSTEP_6; |
| 1701 | break; |
| 1702 | } |
| 1703 | MotorOn = 1; /* from probe restore operation! */ |
| 1704 | } |
| 1705 | |
| 1706 | |
| 1707 | /* This function tests the physical presence of a floppy drive (not |
| 1708 | * whether a disk is inserted). This is done by issuing a restore |
| 1709 | * command, waiting max. 2 seconds (that should be enough to move the |
| 1710 | * head across the whole disk) and looking at the state of the "TR00" |
| 1711 | * signal. This should now be raised if there is a drive connected |
| 1712 | * (and there is no hardware failure :-) Otherwise, the drive is |
| 1713 | * declared absent. |
| 1714 | */ |
| 1715 | |
| 1716 | static int __init fd_test_drive_present( int drive ) |
| 1717 | { |
| 1718 | unsigned long timeout; |
| 1719 | unsigned char status; |
| 1720 | int ok; |
| 1721 | |
| 1722 | if (drive >= (MACH_IS_FALCON ? 1 : 2)) return( 0 ); |
| 1723 | fd_select_drive( drive ); |
| 1724 | |
| 1725 | /* disable interrupt temporarily */ |
| 1726 | atari_turnoff_irq( IRQ_MFP_FDC ); |
| 1727 | FDC_WRITE (FDCREG_TRACK, 0xff00); |
| 1728 | FDC_WRITE( FDCREG_CMD, FDCCMD_RESTORE | FDCCMDADD_H | FDCSTEP_6 ); |
| 1729 | |
| 1730 | timeout = jiffies + 2*HZ+HZ/2; |
| 1731 | while (time_before(jiffies, timeout)) |
| 1732 | if (!(mfp.par_dt_reg & 0x20)) |
| 1733 | break; |
| 1734 | |
| 1735 | status = FDC_READ( FDCREG_STATUS ); |
| 1736 | ok = (status & FDCSTAT_TR00) != 0; |
| 1737 | |
| 1738 | /* force interrupt to abort restore operation (FDC would try |
| 1739 | * about 50 seconds!) */ |
| 1740 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
| 1741 | udelay(500); |
| 1742 | status = FDC_READ( FDCREG_STATUS ); |
| 1743 | udelay(20); |
| 1744 | |
| 1745 | if (ok) { |
| 1746 | /* dummy seek command to make WP bit accessible */ |
| 1747 | FDC_WRITE( FDCREG_DATA, 0 ); |
| 1748 | FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); |
| 1749 | while( mfp.par_dt_reg & 0x20 ) |
| 1750 | ; |
| 1751 | status = FDC_READ( FDCREG_STATUS ); |
| 1752 | } |
| 1753 | |
| 1754 | atari_turnon_irq( IRQ_MFP_FDC ); |
| 1755 | return( ok ); |
| 1756 | } |
| 1757 | |
| 1758 | |
| 1759 | /* Look how many and which kind of drives are connected. If there are |
| 1760 | * floppies, additionally start the disk-change and motor-off timers. |
| 1761 | */ |
| 1762 | |
| 1763 | static void __init config_types( void ) |
| 1764 | { |
| 1765 | int drive, cnt = 0; |
| 1766 | |
| 1767 | /* for probing drives, set the FDC speed to 8 MHz */ |
| 1768 | if (ATARIHW_PRESENT(FDCSPEED)) |
| 1769 | dma_wd.fdc_speed = 0; |
| 1770 | |
| 1771 | printk(KERN_INFO "Probing floppy drive(s):\n"); |
| 1772 | for( drive = 0; drive < FD_MAX_UNITS; drive++ ) { |
| 1773 | fd_probe( drive ); |
| 1774 | if (UD.connected) { |
| 1775 | printk(KERN_INFO "fd%d\n", drive); |
| 1776 | ++cnt; |
| 1777 | } |
| 1778 | } |
| 1779 | |
| 1780 | if (FDC_READ( FDCREG_STATUS ) & FDCSTAT_BUSY) { |
| 1781 | /* If FDC is still busy from probing, give it another FORCI |
| 1782 | * command to abort the operation. If this isn't done, the FDC |
| 1783 | * will interrupt later and its IRQ line stays low, because |
| 1784 | * the status register isn't read. And this will block any |
| 1785 | * interrupts on this IRQ line :-( |
| 1786 | */ |
| 1787 | FDC_WRITE( FDCREG_CMD, FDCCMD_FORCI ); |
| 1788 | udelay(500); |
| 1789 | FDC_READ( FDCREG_STATUS ); |
| 1790 | udelay(20); |
| 1791 | } |
| 1792 | |
| 1793 | if (cnt > 0) { |
| 1794 | start_motor_off_timer(); |
| 1795 | if (cnt == 1) fd_select_drive( 0 ); |
| 1796 | start_check_change_timer(); |
| 1797 | } |
| 1798 | } |
| 1799 | |
| 1800 | /* |
| 1801 | * floppy_open check for aliasing (/dev/fd0 can be the same as |
| 1802 | * /dev/PS0 etc), and disallows simultaneous access to the same |
| 1803 | * drive with different device numbers. |
| 1804 | */ |
| 1805 | |
| 1806 | static int floppy_open( struct inode *inode, struct file *filp ) |
| 1807 | { |
| 1808 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; |
| 1809 | int type = iminor(inode) >> 2; |
| 1810 | |
| 1811 | DPRINT(("fd_open: type=%d\n",type)); |
| 1812 | if (p->ref && p->type != type) |
| 1813 | return -EBUSY; |
| 1814 | |
| 1815 | if (p->ref == -1 || (p->ref && filp->f_flags & O_EXCL)) |
| 1816 | return -EBUSY; |
| 1817 | |
| 1818 | if (filp->f_flags & O_EXCL) |
| 1819 | p->ref = -1; |
| 1820 | else |
| 1821 | p->ref++; |
| 1822 | |
| 1823 | p->type = type; |
| 1824 | |
| 1825 | if (filp->f_flags & O_NDELAY) |
| 1826 | return 0; |
| 1827 | |
| 1828 | if (filp->f_mode & 3) { |
| 1829 | check_disk_change(inode->i_bdev); |
| 1830 | if (filp->f_mode & 2) { |
| 1831 | if (p->wpstat) { |
| 1832 | if (p->ref < 0) |
| 1833 | p->ref = 0; |
| 1834 | else |
| 1835 | p->ref--; |
| 1836 | floppy_release(inode, filp); |
| 1837 | return -EROFS; |
| 1838 | } |
| 1839 | } |
| 1840 | } |
| 1841 | return 0; |
| 1842 | } |
| 1843 | |
| 1844 | |
| 1845 | static int floppy_release( struct inode * inode, struct file * filp ) |
| 1846 | { |
| 1847 | struct atari_floppy_struct *p = inode->i_bdev->bd_disk->private_data; |
| 1848 | if (p->ref < 0) |
| 1849 | p->ref = 0; |
| 1850 | else if (!p->ref--) { |
| 1851 | printk(KERN_ERR "floppy_release with fd_ref == 0"); |
| 1852 | p->ref = 0; |
| 1853 | } |
| 1854 | return 0; |
| 1855 | } |
| 1856 | |
| 1857 | static struct block_device_operations floppy_fops = { |
| 1858 | .owner = THIS_MODULE, |
| 1859 | .open = floppy_open, |
| 1860 | .release = floppy_release, |
| 1861 | .ioctl = fd_ioctl, |
| 1862 | .media_changed = check_floppy_change, |
| 1863 | .revalidate_disk= floppy_revalidate, |
| 1864 | }; |
| 1865 | |
| 1866 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) |
| 1867 | { |
| 1868 | int drive = *part & 3; |
| 1869 | int type = *part >> 2; |
| 1870 | if (drive >= FD_MAX_UNITS || type > NUM_DISK_MINORS) |
| 1871 | return NULL; |
| 1872 | *part = 0; |
| 1873 | return get_disk(unit[drive].disk); |
| 1874 | } |
| 1875 | |
| 1876 | static int __init atari_floppy_init (void) |
| 1877 | { |
| 1878 | int i; |
| 1879 | |
| 1880 | if (!MACH_IS_ATARI) |
| 1881 | /* Amiga, Mac, ... don't have Atari-compatible floppy :-) */ |
| 1882 | return -ENXIO; |
| 1883 | |
| 1884 | if (MACH_IS_HADES) |
| 1885 | /* Hades doesn't have Atari-compatible floppy */ |
| 1886 | return -ENXIO; |
| 1887 | |
| 1888 | if (register_blkdev(FLOPPY_MAJOR,"fd")) |
| 1889 | return -EBUSY; |
| 1890 | |
| 1891 | for (i = 0; i < FD_MAX_UNITS; i++) { |
| 1892 | unit[i].disk = alloc_disk(1); |
| 1893 | if (!unit[i].disk) |
| 1894 | goto Enomem; |
| 1895 | } |
| 1896 | |
| 1897 | if (UseTrackbuffer < 0) |
| 1898 | /* not set by user -> use default: for now, we turn |
| 1899 | track buffering off for all Medusas, though it |
| 1900 | could be used with ones that have a counter |
| 1901 | card. But the test is too hard :-( */ |
| 1902 | UseTrackbuffer = !MACH_IS_MEDUSA; |
| 1903 | |
| 1904 | /* initialize variables */ |
| 1905 | SelectedDrive = -1; |
| 1906 | BufferDrive = -1; |
| 1907 | |
| 1908 | DMABuffer = atari_stram_alloc(BUFFER_SIZE+512, "ataflop"); |
| 1909 | if (!DMABuffer) { |
| 1910 | printk(KERN_ERR "atari_floppy_init: cannot get dma buffer\n"); |
| 1911 | goto Enomem; |
| 1912 | } |
| 1913 | TrackBuffer = DMABuffer + 512; |
| 1914 | PhysDMABuffer = virt_to_phys(DMABuffer); |
| 1915 | PhysTrackBuffer = virt_to_phys(TrackBuffer); |
| 1916 | BufferDrive = BufferSide = BufferTrack = -1; |
| 1917 | |
| 1918 | floppy_queue = blk_init_queue(do_fd_request, &ataflop_lock); |
| 1919 | if (!floppy_queue) |
| 1920 | goto Enomem; |
| 1921 | |
| 1922 | for (i = 0; i < FD_MAX_UNITS; i++) { |
| 1923 | unit[i].track = -1; |
| 1924 | unit[i].flags = 0; |
| 1925 | unit[i].disk->major = FLOPPY_MAJOR; |
| 1926 | unit[i].disk->first_minor = i; |
| 1927 | sprintf(unit[i].disk->disk_name, "fd%d", i); |
| 1928 | unit[i].disk->fops = &floppy_fops; |
| 1929 | unit[i].disk->private_data = &unit[i]; |
| 1930 | unit[i].disk->queue = floppy_queue; |
| 1931 | set_capacity(unit[i].disk, MAX_DISK_SIZE * 2); |
| 1932 | add_disk(unit[i].disk); |
| 1933 | } |
| 1934 | |
| 1935 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
| 1936 | floppy_find, NULL, NULL); |
| 1937 | |
| 1938 | printk(KERN_INFO "Atari floppy driver: max. %cD, %strack buffering\n", |
| 1939 | DriveType == 0 ? 'D' : DriveType == 1 ? 'H' : 'E', |
| 1940 | UseTrackbuffer ? "" : "no "); |
| 1941 | config_types(); |
| 1942 | |
| 1943 | return 0; |
| 1944 | Enomem: |
| 1945 | while (i--) |
| 1946 | put_disk(unit[i].disk); |
| 1947 | if (floppy_queue) |
| 1948 | blk_cleanup_queue(floppy_queue); |
| 1949 | unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| 1950 | return -ENOMEM; |
| 1951 | } |
| 1952 | |
| 1953 | |
| 1954 | void __init atari_floppy_setup( char *str, int *ints ) |
| 1955 | { |
| 1956 | int i; |
| 1957 | |
| 1958 | if (ints[0] < 1) { |
| 1959 | printk(KERN_ERR "ataflop_setup: no arguments!\n" ); |
| 1960 | return; |
| 1961 | } |
| 1962 | else if (ints[0] > 2+FD_MAX_UNITS) { |
| 1963 | printk(KERN_ERR "ataflop_setup: too many arguments\n" ); |
| 1964 | } |
| 1965 | |
| 1966 | if (ints[1] < 0 || ints[1] > 2) |
| 1967 | printk(KERN_ERR "ataflop_setup: bad drive type\n" ); |
| 1968 | else |
| 1969 | DriveType = ints[1]; |
| 1970 | |
| 1971 | if (ints[0] >= 2) |
| 1972 | UseTrackbuffer = (ints[2] > 0); |
| 1973 | |
| 1974 | for( i = 3; i <= ints[0] && i-3 < FD_MAX_UNITS; ++i ) { |
| 1975 | if (ints[i] != 2 && ints[i] != 3 && ints[i] != 6 && ints[i] != 12) |
| 1976 | printk(KERN_ERR "ataflop_setup: bad steprate\n" ); |
| 1977 | else |
| 1978 | UserSteprate[i-3] = ints[i]; |
| 1979 | } |
| 1980 | } |
| 1981 | |
| 1982 | static void atari_floppy_exit(void) |
| 1983 | { |
| 1984 | int i; |
| 1985 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
| 1986 | for (i = 0; i < FD_MAX_UNITS; i++) { |
| 1987 | del_gendisk(unit[i].disk); |
| 1988 | put_disk(unit[i].disk); |
| 1989 | } |
| 1990 | unregister_blkdev(FLOPPY_MAJOR, "fd"); |
| 1991 | |
| 1992 | blk_cleanup_queue(floppy_queue); |
| 1993 | del_timer_sync(&fd_timer); |
| 1994 | atari_stram_free( DMABuffer ); |
| 1995 | } |
| 1996 | |
| 1997 | module_init(atari_floppy_init) |
| 1998 | module_exit(atari_floppy_exit) |
| 1999 | |
| 2000 | MODULE_LICENSE("GPL"); |