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1.1 ! root 1: /* ! 2: * linux/kernel/floppy.c ! 3: * ! 4: * Copyright (C) 1991, 1992 Linus Torvalds ! 5: * Copyright (C) 1993, 1994 Alain Knaff ! 6: */ ! 7: /* ! 8: * 02.12.91 - Changed to static variables to indicate need for reset ! 9: * and recalibrate. This makes some things easier (output_byte reset ! 10: * checking etc), and means less interrupt jumping in case of errors, ! 11: * so the code is hopefully easier to understand. ! 12: */ ! 13: ! 14: /* ! 15: * This file is certainly a mess. I've tried my best to get it working, ! 16: * but I don't like programming floppies, and I have only one anyway. ! 17: * Urgel. I should check for more errors, and do more graceful error ! 18: * recovery. Seems there are problems with several drives. I've tried to ! 19: * correct them. No promises. ! 20: */ ! 21: ! 22: /* ! 23: * As with hd.c, all routines within this file can (and will) be called ! 24: * by interrupts, so extreme caution is needed. A hardware interrupt ! 25: * handler may not sleep, or a kernel panic will happen. Thus I cannot ! 26: * call "floppy-on" directly, but have to set a special timer interrupt ! 27: * etc. ! 28: */ ! 29: ! 30: /* ! 31: * 28.02.92 - made track-buffering routines, based on the routines written ! 32: * by [email protected] (Lawrence Foard). Linus. ! 33: */ ! 34: ! 35: /* ! 36: * Automatic floppy-detection and formatting written by Werner Almesberger ! 37: * ([email protected]), who also corrected some problems with ! 38: * the floppy-change signal detection. ! 39: */ ! 40: ! 41: /* ! 42: * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed ! 43: * FDC data overrun bug, added some preliminary stuff for vertical ! 44: * recording support. ! 45: * ! 46: * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. ! 47: * ! 48: * TODO: Errors are still not counted properly. ! 49: */ ! 50: ! 51: /* 1992/9/20 ! 52: * Modifications for ``Sector Shifting'' by Rob Hooft ([email protected]) ! 53: * modeled after the freeware MS-DOS program fdformat/88 V1.8 by ! 54: * Christoph H. Hochst\"atter. ! 55: * I have fixed the shift values to the ones I always use. Maybe a new ! 56: * ioctl() should be created to be able to modify them. ! 57: * There is a bug in the driver that makes it impossible to format a ! 58: * floppy as the first thing after bootup. ! 59: */ ! 60: ! 61: /* ! 62: * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and ! 63: * this helped the floppy driver as well. Much cleaner, and still seems to ! 64: * work. ! 65: */ ! 66: ! 67: /* 1994/6/24 --bbroad-- added the floppy table entries and made ! 68: * minor modifications to allow 2.88 floppies to be run. ! 69: */ ! 70: ! 71: /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more ! 72: * disk types. ! 73: */ ! 74: ! 75: /* ! 76: * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger ! 77: * format bug fixes, but unfortunately some new bugs too... ! 78: */ ! 79: ! 80: /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write ! 81: * errors to allow safe writing by specialized programs. ! 82: */ ! 83: ! 84: /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks ! 85: * by defining bit 1 of the "stretch" parameter to mean put sectors on the ! 86: * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's ! 87: * drives are "upside-down"). ! 88: */ ! 89: ! 90: /* ! 91: * 1995/8/26 -- Andreas Busse -- added Mips support. ! 92: */ ! 93: ! 94: /* ! 95: * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent ! 96: * features to asm/floppy.h. ! 97: */ ! 98: ! 99: ! 100: #define FLOPPY_SANITY_CHECK ! 101: #undef FLOPPY_SILENT_DCL_CLEAR ! 102: ! 103: #define REALLY_SLOW_IO ! 104: ! 105: #define DEBUGT 2 ! 106: #define DCL_DEBUG /* debug disk change line */ ! 107: ! 108: /* do print messages for unexpected interrupts */ ! 109: static int print_unex=1; ! 110: #include <linux/utsname.h> ! 111: #include <linux/module.h> ! 112: ! 113: /* the following is the mask of allowed drives. By default units 2 and ! 114: * 3 of both floppy controllers are disabled, because switching on the ! 115: * motor of these drives causes system hangs on some PCI computers. drive ! 116: * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if ! 117: * a drive is allowed. */ ! 118: static int FLOPPY_IRQ=6; ! 119: static int FLOPPY_DMA=2; ! 120: static int allowed_drive_mask = 0x33; ! 121: ! 122: static int irqdma_allocated = 0; ! 123: ! 124: #include <linux/sched.h> ! 125: #include <linux/fs.h> ! 126: #include <linux/kernel.h> ! 127: #include <linux/timer.h> ! 128: #include <linux/tqueue.h> ! 129: #define FDPATCHES ! 130: #include <linux/fdreg.h> ! 131: ! 132: ! 133: #include <linux/fd.h> ! 134: ! 135: ! 136: #define OLDFDRAWCMD 0x020d /* send a raw command to the FDC */ ! 137: ! 138: struct old_floppy_raw_cmd { ! 139: void *data; ! 140: long length; ! 141: ! 142: unsigned char rate; ! 143: unsigned char flags; ! 144: unsigned char cmd_count; ! 145: unsigned char cmd[9]; ! 146: unsigned char reply_count; ! 147: unsigned char reply[7]; ! 148: int track; ! 149: }; ! 150: ! 151: #include <linux/errno.h> ! 152: #include <linux/malloc.h> ! 153: #include <linux/mm.h> ! 154: #include <linux/string.h> ! 155: #include <linux/fcntl.h> ! 156: #include <linux/delay.h> ! 157: #include <linux/mc146818rtc.h> /* CMOS defines */ ! 158: #include <linux/ioport.h> ! 159: #include <linux/interrupt.h> ! 160: ! 161: #include <asm/dma.h> ! 162: #include <asm/irq.h> ! 163: #include <asm/system.h> ! 164: #include <asm/io.h> ! 165: #include <asm/segment.h> ! 166: ! 167: static int use_virtual_dma=0; /* virtual DMA for Intel */ ! 168: static unsigned short virtual_dma_port=0x3f0; ! 169: void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs); ! 170: static int set_dor(int fdc, char mask, char data); ! 171: static inline int __get_order(unsigned long size); ! 172: #include <asm/floppy.h> ! 173: ! 174: ! 175: #define MAJOR_NR FLOPPY_MAJOR ! 176: ! 177: #include <linux/blk.h> ! 178: #include <linux/cdrom.h> /* for the compatibility eject ioctl */ ! 179: ! 180: ! 181: #ifndef FLOPPY_MOTOR_MASK ! 182: #define FLOPPY_MOTOR_MASK 0xf0 ! 183: #endif ! 184: ! 185: #ifndef fd_get_dma_residue ! 186: #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) ! 187: #endif ! 188: ! 189: /* Dma Memory related stuff */ ! 190: ! 191: /* Pure 2^n version of get_order */ ! 192: static inline int __get_order(unsigned long size) ! 193: { ! 194: int order; ! 195: ! 196: size = (size-1) >> (PAGE_SHIFT-1); ! 197: order = -1; ! 198: do { ! 199: size >>= 1; ! 200: order++; ! 201: } while (size); ! 202: return order; ! 203: } ! 204: ! 205: #ifndef fd_dma_mem_free ! 206: #define fd_dma_mem_free(addr, size) free_pages(addr, __get_order(size)) ! 207: #endif ! 208: ! 209: #ifndef fd_dma_mem_alloc ! 210: #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,__get_order(size)) ! 211: #endif ! 212: ! 213: /* End dma memory related stuff */ ! 214: ! 215: static unsigned int fake_change = 0; ! 216: static int initialising=1; ! 217: ! 218: static inline int TYPE(kdev_t x) { ! 219: return (MINOR(x)>>2) & 0x1f; ! 220: } ! 221: static inline int DRIVE(kdev_t x) { ! 222: return (MINOR(x)&0x03) | ((MINOR(x)&0x80) >> 5); ! 223: } ! 224: #define ITYPE(x) (((x)>>2) & 0x1f) ! 225: #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) ! 226: #define UNIT(x) ((x) & 0x03) /* drive on fdc */ ! 227: #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ ! 228: #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) ! 229: /* reverse mapping from unit and fdc to drive */ ! 230: #define DP (&drive_params[current_drive]) ! 231: #define DRS (&drive_state[current_drive]) ! 232: #define DRWE (&write_errors[current_drive]) ! 233: #define FDCS (&fdc_state[fdc]) ! 234: #define CLEARF(x) (clear_bit(x##_BIT, &DRS->flags)) ! 235: #define SETF(x) (set_bit(x##_BIT, &DRS->flags)) ! 236: #define TESTF(x) (test_bit(x##_BIT, &DRS->flags)) ! 237: ! 238: #define UDP (&drive_params[drive]) ! 239: #define UDRS (&drive_state[drive]) ! 240: #define UDRWE (&write_errors[drive]) ! 241: #define UFDCS (&fdc_state[FDC(drive)]) ! 242: #define UCLEARF(x) (clear_bit(x##_BIT, &UDRS->flags)) ! 243: #define USETF(x) (set_bit(x##_BIT, &UDRS->flags)) ! 244: #define UTESTF(x) (test_bit(x##_BIT, &UDRS->flags)) ! 245: ! 246: #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) ! 247: ! 248: #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) ! 249: #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) ! 250: ! 251: #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) ! 252: ! 253: #define INT_OFF save_flags(flags); cli() ! 254: #define INT_ON restore_flags(flags) ! 255: ! 256: /* read/write */ ! 257: #define COMMAND raw_cmd->cmd[0] ! 258: #define DR_SELECT raw_cmd->cmd[1] ! 259: #define TRACK raw_cmd->cmd[2] ! 260: #define HEAD raw_cmd->cmd[3] ! 261: #define SECTOR raw_cmd->cmd[4] ! 262: #define SIZECODE raw_cmd->cmd[5] ! 263: #define SECT_PER_TRACK raw_cmd->cmd[6] ! 264: #define GAP raw_cmd->cmd[7] ! 265: #define SIZECODE2 raw_cmd->cmd[8] ! 266: #define NR_RW 9 ! 267: ! 268: /* format */ ! 269: #define F_SIZECODE raw_cmd->cmd[2] ! 270: #define F_SECT_PER_TRACK raw_cmd->cmd[3] ! 271: #define F_GAP raw_cmd->cmd[4] ! 272: #define F_FILL raw_cmd->cmd[5] ! 273: #define NR_F 6 ! 274: ! 275: /* ! 276: * Maximum disk size (in kilobytes). This default is used whenever the ! 277: * current disk size is unknown. ! 278: * [Now it is rather a minimum] ! 279: */ ! 280: #define MAX_DISK_SIZE 4 /* 3984*/ ! 281: ! 282: #define K_64 0x10000 /* 64KB */ ! 283: ! 284: /* ! 285: * globals used by 'result()' ! 286: */ ! 287: #define MAX_REPLIES 16 ! 288: static unsigned char reply_buffer[MAX_REPLIES]; ! 289: static int inr; /* size of reply buffer, when called from interrupt */ ! 290: #define ST0 (reply_buffer[0]) ! 291: #define ST1 (reply_buffer[1]) ! 292: #define ST2 (reply_buffer[2]) ! 293: #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ ! 294: #define R_TRACK (reply_buffer[3]) ! 295: #define R_HEAD (reply_buffer[4]) ! 296: #define R_SECTOR (reply_buffer[5]) ! 297: #define R_SIZECODE (reply_buffer[6]) ! 298: ! 299: #define SEL_DLY (2*HZ/100) ! 300: ! 301: #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0])) ! 302: /* ! 303: * this struct defines the different floppy drive types. ! 304: */ ! 305: static struct { ! 306: struct floppy_drive_params params; ! 307: const char *name; /* name printed while booting */ ! 308: } default_drive_params[]= { ! 309: /* NOTE: the time values in jiffies should be in msec! ! 310: CMOS drive type ! 311: | Maximum data rate supported by drive type ! 312: | | Head load time, msec ! 313: | | | Head unload time, msec (not used) ! 314: | | | | Step rate interval, usec ! 315: | | | | | Time needed for spinup time (jiffies) ! 316: | | | | | | Timeout for spinning down (jiffies) ! 317: | | | | | | | Spindown offset (where disk stops) ! 318: | | | | | | | | Select delay ! 319: | | | | | | | | | RPS ! 320: | | | | | | | | | | Max number of tracks ! 321: | | | | | | | | | | | Interrupt timeout ! 322: | | | | | | | | | | | | Max nonintlv. sectors ! 323: | | | | | | | | | | | | | -Max Errors- flags */ ! 324: {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, ! 325: 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, ! 326: ! 327: {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, ! 328: 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ ! 329: ! 330: {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, ! 331: 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ ! 332: ! 333: {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 334: 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ ! 335: ! 336: {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, ! 337: 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ ! 338: ! 339: {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 340: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ ! 341: ! 342: {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, ! 343: 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ ! 344: /* | --autodetected formats--- | | | ! 345: * read_track | | Name printed when booting ! 346: * | Native format ! 347: * Frequency of disk change checks */ ! 348: }; ! 349: ! 350: static struct floppy_drive_params drive_params[N_DRIVE]; ! 351: static struct floppy_drive_struct drive_state[N_DRIVE]; ! 352: static struct floppy_write_errors write_errors[N_DRIVE]; ! 353: static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; ! 354: ! 355: /* ! 356: * This struct defines the different floppy types. ! 357: * ! 358: * Bit 0 of 'stretch' tells if the tracks need to be doubled for some ! 359: * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' ! 360: * tells if the disk is in Commodore 1581 format, which means side 0 sectors ! 361: * are located on side 1 of the disk but with a side 0 ID, and vice-versa. ! 362: * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the ! 363: * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical ! 364: * side 0 is on physical side 0 (but with the misnamed sector IDs). ! 365: * 'stretch' should probably be renamed to something more general, like ! 366: * 'options'. Other parameters should be self-explanatory (see also ! 367: * setfdprm(8)). ! 368: */ ! 369: static struct floppy_struct floppy_type[32] = { ! 370: { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ ! 371: { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ ! 372: { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ ! 373: { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ ! 374: { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ ! 375: { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ ! 376: { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ ! 377: { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ ! 378: { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ ! 379: { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120"}, /* 9 3.12MB 3.5" */ ! 380: ! 381: { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ ! 382: { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ ! 383: { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ ! 384: { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ ! 385: { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ ! 386: { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ ! 387: { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ ! 388: { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ ! 389: { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ ! 390: { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ ! 391: ! 392: { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ ! 393: { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ ! 394: { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ ! 395: { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ ! 396: { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ ! 397: { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ ! 398: { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ ! 399: { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ ! 400: { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ ! 401: ! 402: { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ ! 403: { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ ! 404: { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ ! 405: }; ! 406: ! 407: #define NUMBER(x) (sizeof(x) / sizeof(*(x))) ! 408: #define SECTSIZE (_FD_SECTSIZE(*floppy)) ! 409: ! 410: /* Auto-detection: Disk type used until the next media change occurs. */ ! 411: static struct floppy_struct *current_type[N_DRIVE] = { ! 412: NULL, NULL, NULL, NULL, ! 413: NULL, NULL, NULL, NULL ! 414: }; ! 415: ! 416: /* ! 417: * User-provided type information. current_type points to ! 418: * the respective entry of this array. ! 419: */ ! 420: static struct floppy_struct user_params[N_DRIVE]; ! 421: ! 422: static int floppy_sizes[256]; ! 423: static int floppy_blocksizes[256] = { 0, }; ! 424: ! 425: /* ! 426: * The driver is trying to determine the correct media format ! 427: * while probing is set. rw_interrupt() clears it after a ! 428: * successful access. ! 429: */ ! 430: static int probing = 0; ! 431: ! 432: /* Synchronization of FDC access. */ ! 433: #define FD_COMMAND_NONE -1 ! 434: #define FD_COMMAND_ERROR 2 ! 435: #define FD_COMMAND_OKAY 3 ! 436: ! 437: static volatile int command_status = FD_COMMAND_NONE, fdc_busy = 0; ! 438: static struct wait_queue *fdc_wait = NULL, *command_done = NULL; ! 439: #ifdef MACH ! 440: extern int issig (void); ! 441: #define NO_SIGNAL (! issig () || ! interruptible) ! 442: #else ! 443: #define NO_SIGNAL (!(current->signal & ~current->blocked) || !interruptible) ! 444: #endif ! 445: #define CALL(x) if ((x) == -EINTR) return -EINTR ! 446: #define ECALL(x) if ((ret = (x))) return ret; ! 447: #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) ! 448: #define WAIT(x) _WAIT((x),interruptible) ! 449: #define IWAIT(x) _WAIT((x),1) ! 450: ! 451: /* Errors during formatting are counted here. */ ! 452: static int format_errors; ! 453: ! 454: /* Format request descriptor. */ ! 455: static struct format_descr format_req; ! 456: ! 457: /* ! 458: * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps ! 459: * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), ! 460: * H is head unload time (1=16ms, 2=32ms, etc) ! 461: */ ! 462: ! 463: /* ! 464: * Track buffer ! 465: * Because these are written to by the DMA controller, they must ! 466: * not contain a 64k byte boundary crossing, or data will be ! 467: * corrupted/lost. ! 468: */ ! 469: static char *floppy_track_buffer=0; ! 470: static int max_buffer_sectors=0; ! 471: ! 472: static int *errors; ! 473: typedef void (*done_f)(int); ! 474: static struct cont_t { ! 475: void (*interrupt)(void); /* this is called after the interrupt of the ! 476: * main command */ ! 477: void (*redo)(void); /* this is called to retry the operation */ ! 478: void (*error)(void); /* this is called to tally an error */ ! 479: done_f done; /* this is called to say if the operation has ! 480: * succeeded/failed */ ! 481: } *cont=NULL; ! 482: ! 483: static void floppy_ready(void); ! 484: static void floppy_start(void); ! 485: static void process_fd_request(void); ! 486: static void recalibrate_floppy(void); ! 487: static void floppy_shutdown(void); ! 488: ! 489: static int floppy_grab_irq_and_dma(void); ! 490: static void floppy_release_irq_and_dma(void); ! 491: ! 492: /* ! 493: * The "reset" variable should be tested whenever an interrupt is scheduled, ! 494: * after the commands have been sent. This is to ensure that the driver doesn't ! 495: * get wedged when the interrupt doesn't come because of a failed command. ! 496: * reset doesn't need to be tested before sending commands, because ! 497: * output_byte is automatically disabled when reset is set. ! 498: */ ! 499: #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } ! 500: static void reset_fdc(void); ! 501: ! 502: /* ! 503: * These are global variables, as that's the easiest way to give ! 504: * information to interrupts. They are the data used for the current ! 505: * request. ! 506: */ ! 507: #define NO_TRACK -1 ! 508: #define NEED_1_RECAL -2 ! 509: #define NEED_2_RECAL -3 ! 510: ! 511: /* */ ! 512: static int usage_count = 0; ! 513: ! 514: ! 515: /* buffer related variables */ ! 516: static int buffer_track = -1; ! 517: static int buffer_drive = -1; ! 518: static int buffer_min = -1; ! 519: static int buffer_max = -1; ! 520: ! 521: /* fdc related variables, should end up in a struct */ ! 522: static struct floppy_fdc_state fdc_state[N_FDC]; ! 523: static int fdc; /* current fdc */ ! 524: ! 525: static struct floppy_struct *_floppy = floppy_type; ! 526: static unsigned char current_drive = 0; ! 527: static long current_count_sectors = 0; ! 528: static unsigned char sector_t; /* sector in track */ ! 529: ! 530: #ifndef fd_eject ! 531: #define fd_eject(x) -EINVAL ! 532: #endif ! 533: ! 534: ! 535: #ifdef DEBUGT ! 536: static long unsigned debugtimer; ! 537: #endif ! 538: ! 539: /* ! 540: * Debugging ! 541: * ========= ! 542: */ ! 543: static inline void set_debugt(void) ! 544: { ! 545: #ifdef DEBUGT ! 546: debugtimer = jiffies; ! 547: #endif ! 548: } ! 549: ! 550: static inline void debugt(const char *message) ! 551: { ! 552: #ifdef DEBUGT ! 553: if (DP->flags & DEBUGT) ! 554: printk("%s dtime=%lu\n", message, jiffies-debugtimer); ! 555: #endif ! 556: } ! 557: ! 558: typedef void (*timeout_fn)(unsigned long); ! 559: static struct timer_list fd_timeout ={ NULL, NULL, 0, 0, ! 560: (timeout_fn) floppy_shutdown }; ! 561: ! 562: static const char *timeout_message; ! 563: ! 564: #ifdef FLOPPY_SANITY_CHECK ! 565: static void is_alive(const char *message) ! 566: { ! 567: /* this routine checks whether the floppy driver is "alive" */ ! 568: if (fdc_busy && command_status < 2 && !fd_timeout.prev){ ! 569: DPRINT("timeout handler died: %s\n",message); ! 570: } ! 571: } ! 572: #endif ! 573: ! 574: #ifdef FLOPPY_SANITY_CHECK ! 575: ! 576: #define OLOGSIZE 20 ! 577: ! 578: static void (*lasthandler)(void) = NULL; ! 579: static int interruptjiffies=0; ! 580: static int resultjiffies=0; ! 581: static int resultsize=0; ! 582: static int lastredo=0; ! 583: ! 584: static struct output_log { ! 585: unsigned char data; ! 586: unsigned char status; ! 587: unsigned long jiffies; ! 588: } output_log[OLOGSIZE]; ! 589: ! 590: static int output_log_pos=0; ! 591: #endif ! 592: ! 593: #define CURRENTD -1 ! 594: #define MAXTIMEOUT -2 ! 595: ! 596: static void reschedule_timeout(int drive, const char *message, int marg) ! 597: { ! 598: if (drive == CURRENTD) ! 599: drive = current_drive; ! 600: del_timer(&fd_timeout); ! 601: if (drive < 0 || drive > N_DRIVE) { ! 602: fd_timeout.expires = jiffies + 20*HZ; ! 603: drive=0; ! 604: } else ! 605: fd_timeout.expires = jiffies + UDP->timeout; ! 606: add_timer(&fd_timeout); ! 607: if (UDP->flags & FD_DEBUG){ ! 608: DPRINT("reschedule timeout "); ! 609: printk(message, marg); ! 610: printk("\n"); ! 611: } ! 612: timeout_message = message; ! 613: } ! 614: ! 615: static int maximum(int a, int b) ! 616: { ! 617: if(a > b) ! 618: return a; ! 619: else ! 620: return b; ! 621: } ! 622: #define INFBOUND(a,b) (a)=maximum((a),(b)); ! 623: ! 624: static int minimum(int a, int b) ! 625: { ! 626: if(a < b) ! 627: return a; ! 628: else ! 629: return b; ! 630: } ! 631: #define SUPBOUND(a,b) (a)=minimum((a),(b)); ! 632: ! 633: ! 634: /* ! 635: * Bottom half floppy driver. ! 636: * ========================== ! 637: * ! 638: * This part of the file contains the code talking directly to the hardware, ! 639: * and also the main service loop (seek-configure-spinup-command) ! 640: */ ! 641: ! 642: /* ! 643: * disk change. ! 644: * This routine is responsible for maintaining the FD_DISK_CHANGE flag, ! 645: * and the last_checked date. ! 646: * ! 647: * last_checked is the date of the last check which showed 'no disk change' ! 648: * FD_DISK_CHANGE is set under two conditions: ! 649: * 1. The floppy has been changed after some i/o to that floppy already ! 650: * took place. ! 651: * 2. No floppy disk is in the drive. This is done in order to ensure that ! 652: * requests are quickly flushed in case there is no disk in the drive. It ! 653: * follows that FD_DISK_CHANGE can only be cleared if there is a disk in ! 654: * the drive. ! 655: * ! 656: * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. ! 657: * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on ! 658: * each seek. If a disk is present, the disk change line should also be ! 659: * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk ! 660: * change line is set, this means either that no disk is in the drive, or ! 661: * that it has been removed since the last seek. ! 662: * ! 663: * This means that we really have a third possibility too: ! 664: * The floppy has been changed after the last seek. ! 665: */ ! 666: ! 667: static int disk_change(int drive) ! 668: { ! 669: int fdc=FDC(drive); ! 670: #ifdef FLOPPY_SANITY_CHECK ! 671: if (jiffies - UDRS->select_date < UDP->select_delay) ! 672: DPRINT("WARNING disk change called early\n"); ! 673: if (!(FDCS->dor & (0x10 << UNIT(drive))) || ! 674: (FDCS->dor & 3) != UNIT(drive) || ! 675: fdc != FDC(drive)){ ! 676: DPRINT("probing disk change on unselected drive\n"); ! 677: DPRINT("drive=%d fdc=%d dor=%x\n",drive, FDC(drive), ! 678: FDCS->dor); ! 679: } ! 680: #endif ! 681: ! 682: #ifdef DCL_DEBUG ! 683: if (UDP->flags & FD_DEBUG){ ! 684: DPRINT("checking disk change line for drive %d\n",drive); ! 685: DPRINT("jiffies=%ld\n", jiffies); ! 686: DPRINT("disk change line=%x\n",fd_inb(FD_DIR)&0x80); ! 687: DPRINT("flags=%x\n",UDRS->flags); ! 688: } ! 689: #endif ! 690: if (UDP->flags & FD_BROKEN_DCL) ! 691: return UTESTF(FD_DISK_CHANGED); ! 692: if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80){ ! 693: USETF(FD_VERIFY); /* verify write protection */ ! 694: if (UDRS->maxblock){ ! 695: /* mark it changed */ ! 696: USETF(FD_DISK_CHANGED); ! 697: } ! 698: ! 699: /* invalidate its geometry */ ! 700: if (UDRS->keep_data >= 0) { ! 701: if ((UDP->flags & FTD_MSG) && ! 702: current_type[drive] != NULL) ! 703: DPRINT("Disk type is undefined after " ! 704: "disk change\n"); ! 705: current_type[drive] = NULL; ! 706: floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE; ! 707: } ! 708: ! 709: /*USETF(FD_DISK_NEWCHANGE);*/ ! 710: return 1; ! 711: } else { ! 712: UDRS->last_checked=jiffies; ! 713: UCLEARF(FD_DISK_NEWCHANGE); ! 714: } ! 715: return 0; ! 716: } ! 717: ! 718: static inline int is_selected(int dor, int unit) ! 719: { ! 720: return ((dor & (0x10 << unit)) && (dor &3) == unit); ! 721: } ! 722: ! 723: static int set_dor(int fdc, char mask, char data) ! 724: { ! 725: register unsigned char drive, unit, newdor,olddor; ! 726: ! 727: if (FDCS->address == -1) ! 728: return -1; ! 729: ! 730: olddor = FDCS->dor; ! 731: newdor = (olddor & mask) | data; ! 732: if (newdor != olddor){ ! 733: unit = olddor & 0x3; ! 734: if (is_selected(olddor, unit) && !is_selected(newdor,unit)){ ! 735: drive = REVDRIVE(fdc,unit); ! 736: #ifdef DCL_DEBUG ! 737: if (UDP->flags & FD_DEBUG){ ! 738: DPRINT("calling disk change from set_dor\n"); ! 739: } ! 740: #endif ! 741: disk_change(drive); ! 742: } ! 743: FDCS->dor = newdor; ! 744: fd_outb(newdor, FD_DOR); ! 745: ! 746: unit = newdor & 0x3; ! 747: if (!is_selected(olddor, unit) && is_selected(newdor,unit)){ ! 748: drive = REVDRIVE(fdc,unit); ! 749: UDRS->select_date = jiffies; ! 750: } ! 751: } ! 752: ! 753: /* FIXME: we should be more graceful here */ ! 754: ! 755: if (newdor & FLOPPY_MOTOR_MASK) ! 756: floppy_grab_irq_and_dma(); ! 757: if (olddor & FLOPPY_MOTOR_MASK) ! 758: floppy_release_irq_and_dma(); ! 759: return olddor; ! 760: } ! 761: ! 762: static void twaddle(void) ! 763: { ! 764: if (DP->select_delay) ! 765: return; ! 766: fd_outb(FDCS->dor & ~(0x10<<UNIT(current_drive)),FD_DOR); ! 767: fd_outb(FDCS->dor, FD_DOR); ! 768: DRS->select_date = jiffies; ! 769: } ! 770: ! 771: /* reset all driver information about the current fdc. This is needed after ! 772: * a reset, and after a raw command. */ ! 773: static void reset_fdc_info(int mode) ! 774: { ! 775: int drive; ! 776: ! 777: FDCS->spec1 = FDCS->spec2 = -1; ! 778: FDCS->need_configure = 1; ! 779: FDCS->perp_mode = 1; ! 780: FDCS->rawcmd = 0; ! 781: for (drive = 0; drive < N_DRIVE; drive++) ! 782: if (FDC(drive) == fdc && ! 783: (mode || UDRS->track != NEED_1_RECAL)) ! 784: UDRS->track = NEED_2_RECAL; ! 785: } ! 786: ! 787: /* selects the fdc and drive, and enables the fdc's input/dma. */ ! 788: static void set_fdc(int drive) ! 789: { ! 790: if (drive >= 0 && drive < N_DRIVE){ ! 791: fdc = FDC(drive); ! 792: current_drive = drive; ! 793: } ! 794: if (fdc != 1 && fdc != 0) { ! 795: printk("bad fdc value\n"); ! 796: return; ! 797: } ! 798: set_dor(fdc,~0,8); ! 799: #if N_FDC > 1 ! 800: set_dor(1-fdc, ~8, 0); ! 801: #endif ! 802: if (FDCS->rawcmd == 2) ! 803: reset_fdc_info(1); ! 804: if (fd_inb(FD_STATUS) != STATUS_READY) ! 805: FDCS->reset = 1; ! 806: } ! 807: ! 808: /* locks the driver */ ! 809: static int lock_fdc(int drive, int interruptible) ! 810: { ! 811: unsigned long flags; ! 812: ! 813: if (!usage_count){ ! 814: printk(KERN_ERR "trying to lock fdc while usage count=0\n"); ! 815: return -1; ! 816: } ! 817: if(floppy_grab_irq_and_dma()==-1) ! 818: return -EBUSY; ! 819: INT_OFF; ! 820: while (fdc_busy && NO_SIGNAL) ! 821: interruptible_sleep_on(&fdc_wait); ! 822: if (fdc_busy){ ! 823: INT_ON; ! 824: return -EINTR; ! 825: } ! 826: fdc_busy = 1; ! 827: INT_ON; ! 828: command_status = FD_COMMAND_NONE; ! 829: reschedule_timeout(drive, "lock fdc", 0); ! 830: set_fdc(drive); ! 831: return 0; ! 832: } ! 833: ! 834: #define LOCK_FDC(drive,interruptible) \ ! 835: if (lock_fdc(drive,interruptible)) return -EINTR; ! 836: ! 837: ! 838: /* unlocks the driver */ ! 839: static inline void unlock_fdc(void) ! 840: { ! 841: raw_cmd = 0; ! 842: if (!fdc_busy) ! 843: DPRINT("FDC access conflict!\n"); ! 844: ! 845: if (DEVICE_INTR) ! 846: DPRINT("device interrupt still active at FDC release: %p!\n", ! 847: DEVICE_INTR); ! 848: command_status = FD_COMMAND_NONE; ! 849: del_timer(&fd_timeout); ! 850: cont = NULL; ! 851: fdc_busy = 0; ! 852: floppy_release_irq_and_dma(); ! 853: wake_up(&fdc_wait); ! 854: } ! 855: ! 856: /* switches the motor off after a given timeout */ ! 857: static void motor_off_callback(unsigned long nr) ! 858: { ! 859: unsigned char mask = ~(0x10 << UNIT(nr)); ! 860: ! 861: set_dor(FDC(nr), mask, 0); ! 862: } ! 863: ! 864: static struct timer_list motor_off_timer[N_DRIVE] = { ! 865: { NULL, NULL, 0, 0, motor_off_callback }, ! 866: { NULL, NULL, 0, 1, motor_off_callback }, ! 867: { NULL, NULL, 0, 2, motor_off_callback }, ! 868: { NULL, NULL, 0, 3, motor_off_callback }, ! 869: { NULL, NULL, 0, 4, motor_off_callback }, ! 870: { NULL, NULL, 0, 5, motor_off_callback }, ! 871: { NULL, NULL, 0, 6, motor_off_callback }, ! 872: { NULL, NULL, 0, 7, motor_off_callback } ! 873: }; ! 874: ! 875: /* schedules motor off */ ! 876: static void floppy_off(unsigned int drive) ! 877: { ! 878: unsigned long volatile delta; ! 879: register int fdc=FDC(drive); ! 880: ! 881: if (!(FDCS->dor & (0x10 << UNIT(drive)))) ! 882: return; ! 883: ! 884: del_timer(motor_off_timer+drive); ! 885: ! 886: /* make spindle stop in a position which minimizes spinup time ! 887: * next time */ ! 888: if (UDP->rps){ ! 889: delta = jiffies - UDRS->first_read_date + HZ - ! 890: UDP->spindown_offset; ! 891: delta = ((delta * UDP->rps) % HZ) / UDP->rps; ! 892: motor_off_timer[drive].expires = jiffies + UDP->spindown - delta; ! 893: } ! 894: add_timer(motor_off_timer+drive); ! 895: } ! 896: ! 897: /* ! 898: * cycle through all N_DRIVE floppy drives, for disk change testing. ! 899: * stopping at current drive. This is done before any long operation, to ! 900: * be sure to have up to date disk change information. ! 901: */ ! 902: static void scandrives(void) ! 903: { ! 904: int i, drive, saved_drive; ! 905: ! 906: if (DP->select_delay) ! 907: return; ! 908: ! 909: saved_drive = current_drive; ! 910: for (i=0; i < N_DRIVE; i++){ ! 911: drive = (saved_drive + i + 1) % N_DRIVE; ! 912: if (UDRS->fd_ref == 0 || UDP->select_delay != 0) ! 913: continue; /* skip closed drives */ ! 914: set_fdc(drive); ! 915: if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & ! 916: (0x10 << UNIT(drive)))) ! 917: /* switch the motor off again, if it was off to ! 918: * begin with */ ! 919: set_dor(fdc, ~(0x10 << UNIT(drive)), 0); ! 920: } ! 921: set_fdc(saved_drive); ! 922: } ! 923: ! 924: static void empty(void) ! 925: { ! 926: } ! 927: ! 928: static struct tq_struct floppy_tq = ! 929: { 0, 0, 0, 0 }; ! 930: ! 931: static struct timer_list fd_timer ={ NULL, NULL, 0, 0, 0 }; ! 932: ! 933: static void cancel_activity(void) ! 934: { ! 935: CLEAR_INTR; ! 936: floppy_tq.routine = (void *)(void *) empty; ! 937: del_timer(&fd_timer); ! 938: } ! 939: ! 940: /* this function makes sure that the disk stays in the drive during the ! 941: * transfer */ ! 942: static void fd_watchdog(void) ! 943: { ! 944: #ifdef DCL_DEBUG ! 945: if (DP->flags & FD_DEBUG){ ! 946: DPRINT("calling disk change from watchdog\n"); ! 947: } ! 948: #endif ! 949: ! 950: if (disk_change(current_drive)){ ! 951: DPRINT("disk removed during i/o\n"); ! 952: cancel_activity(); ! 953: cont->done(0); ! 954: reset_fdc(); ! 955: } else { ! 956: del_timer(&fd_timer); ! 957: fd_timer.function = (timeout_fn) fd_watchdog; ! 958: fd_timer.expires = jiffies + HZ / 10; ! 959: add_timer(&fd_timer); ! 960: } ! 961: } ! 962: ! 963: static void main_command_interrupt(void) ! 964: { ! 965: del_timer(&fd_timer); ! 966: cont->interrupt(); ! 967: } ! 968: ! 969: /* waits for a delay (spinup or select) to pass */ ! 970: static int wait_for_completion(int delay, timeout_fn function) ! 971: { ! 972: if (FDCS->reset){ ! 973: reset_fdc(); /* do the reset during sleep to win time ! 974: * if we don't need to sleep, it's a good ! 975: * occasion anyways */ ! 976: return 1; ! 977: } ! 978: ! 979: if ((signed) (jiffies - delay) < 0){ ! 980: del_timer(&fd_timer); ! 981: fd_timer.function = function; ! 982: fd_timer.expires = delay; ! 983: add_timer(&fd_timer); ! 984: return 1; ! 985: } ! 986: return 0; ! 987: } ! 988: ! 989: static int hlt_disabled=0; ! 990: static void floppy_disable_hlt(void) ! 991: { ! 992: unsigned long flags; ! 993: ! 994: INT_OFF; ! 995: if (!hlt_disabled){ ! 996: hlt_disabled=1; ! 997: #ifdef HAVE_DISABLE_HLT ! 998: disable_hlt(); ! 999: #endif ! 1000: } ! 1001: INT_ON; ! 1002: } ! 1003: ! 1004: static void floppy_enable_hlt(void) ! 1005: { ! 1006: unsigned long flags; ! 1007: ! 1008: INT_OFF; ! 1009: if (hlt_disabled){ ! 1010: hlt_disabled=0; ! 1011: #ifdef HAVE_DISABLE_HLT ! 1012: enable_hlt(); ! 1013: #endif ! 1014: } ! 1015: INT_ON; ! 1016: } ! 1017: ! 1018: ! 1019: static void setup_DMA(void) ! 1020: { ! 1021: unsigned long flags; ! 1022: ! 1023: #ifdef FLOPPY_SANITY_CHECK ! 1024: if (raw_cmd->length == 0){ ! 1025: int i; ! 1026: ! 1027: printk("zero dma transfer size:"); ! 1028: for (i=0; i < raw_cmd->cmd_count; i++) ! 1029: printk("%x,", raw_cmd->cmd[i]); ! 1030: printk("\n"); ! 1031: cont->done(0); ! 1032: FDCS->reset = 1; ! 1033: return; ! 1034: } ! 1035: if ((long) raw_cmd->kernel_data % 512){ ! 1036: printk("non aligned address: %p\n", raw_cmd->kernel_data); ! 1037: cont->done(0); ! 1038: FDCS->reset=1; ! 1039: return; ! 1040: } ! 1041: if (CROSS_64KB(raw_cmd->kernel_data, raw_cmd->length)) { ! 1042: printk("DMA crossing 64-K boundary %p-%p\n", ! 1043: raw_cmd->kernel_data, ! 1044: raw_cmd->kernel_data + raw_cmd->length); ! 1045: cont->done(0); ! 1046: FDCS->reset=1; ! 1047: return; ! 1048: } ! 1049: #endif ! 1050: INT_OFF; ! 1051: fd_disable_dma(); ! 1052: fd_clear_dma_ff(); ! 1053: fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); ! 1054: fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ)? ! 1055: DMA_MODE_READ : DMA_MODE_WRITE); ! 1056: fd_set_dma_addr(virt_to_bus(raw_cmd->kernel_data)); ! 1057: fd_set_dma_count(raw_cmd->length); ! 1058: virtual_dma_port = FDCS->address; ! 1059: fd_enable_dma(); ! 1060: INT_ON; ! 1061: floppy_disable_hlt(); ! 1062: } ! 1063: ! 1064: void show_floppy(void); ! 1065: ! 1066: /* waits until the fdc becomes ready */ ! 1067: static int wait_til_ready(void) ! 1068: { ! 1069: int counter, status; ! 1070: if(FDCS->reset) ! 1071: return -1; ! 1072: for (counter = 0; counter < 10000; counter++) { ! 1073: status = fd_inb(FD_STATUS); ! 1074: if (status & STATUS_READY) ! 1075: return status; ! 1076: } ! 1077: if (!initialising) { ! 1078: DPRINT("Getstatus times out (%x) on fdc %d\n", ! 1079: status, fdc); ! 1080: show_floppy(); ! 1081: } ! 1082: FDCS->reset = 1; ! 1083: return -1; ! 1084: } ! 1085: ! 1086: /* sends a command byte to the fdc */ ! 1087: static int output_byte(char byte) ! 1088: { ! 1089: int status; ! 1090: ! 1091: if ((status = wait_til_ready()) < 0) ! 1092: return -1; ! 1093: if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY){ ! 1094: fd_outb(byte,FD_DATA); ! 1095: #ifdef FLOPPY_SANITY_CHECK ! 1096: output_log[output_log_pos].data = byte; ! 1097: output_log[output_log_pos].status = status; ! 1098: output_log[output_log_pos].jiffies = jiffies; ! 1099: output_log_pos = (output_log_pos + 1) % OLOGSIZE; ! 1100: #endif ! 1101: return 0; ! 1102: } ! 1103: FDCS->reset = 1; ! 1104: if (!initialising) { ! 1105: DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", ! 1106: byte, fdc, status); ! 1107: show_floppy(); ! 1108: } ! 1109: return -1; ! 1110: } ! 1111: #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} ! 1112: ! 1113: /* gets the response from the fdc */ ! 1114: static int result(void) ! 1115: { ! 1116: int i, status; ! 1117: ! 1118: for(i=0; i < MAX_REPLIES; i++) { ! 1119: if ((status = wait_til_ready()) < 0) ! 1120: break; ! 1121: status &= STATUS_DIR|STATUS_READY|STATUS_BUSY|STATUS_DMA; ! 1122: if ((status & ~STATUS_BUSY) == STATUS_READY){ ! 1123: #ifdef FLOPPY_SANITY_CHECK ! 1124: resultjiffies = jiffies; ! 1125: resultsize = i; ! 1126: #endif ! 1127: return i; ! 1128: } ! 1129: if (status == (STATUS_DIR|STATUS_READY|STATUS_BUSY)) ! 1130: reply_buffer[i] = fd_inb(FD_DATA); ! 1131: else ! 1132: break; ! 1133: } ! 1134: if(!initialising) { ! 1135: DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", ! 1136: fdc, status, i); ! 1137: show_floppy(); ! 1138: } ! 1139: FDCS->reset = 1; ! 1140: return -1; ! 1141: } ! 1142: ! 1143: #define MORE_OUTPUT -2 ! 1144: /* does the fdc need more output? */ ! 1145: static int need_more_output(void) ! 1146: { ! 1147: int status; ! 1148: if( (status = wait_til_ready()) < 0) ! 1149: return -1; ! 1150: if ((status & (STATUS_READY|STATUS_DIR|STATUS_DMA)) == STATUS_READY) ! 1151: return MORE_OUTPUT; ! 1152: return result(); ! 1153: } ! 1154: ! 1155: /* Set perpendicular mode as required, based on data rate, if supported. ! 1156: * 82077 Now tested. 1Mbps data rate only possible with 82077-1. ! 1157: */ ! 1158: static inline void perpendicular_mode(void) ! 1159: { ! 1160: unsigned char perp_mode; ! 1161: ! 1162: if (raw_cmd->rate & 0x40){ ! 1163: switch(raw_cmd->rate & 3){ ! 1164: case 0: ! 1165: perp_mode=2; ! 1166: break; ! 1167: case 3: ! 1168: perp_mode=3; ! 1169: break; ! 1170: default: ! 1171: DPRINT("Invalid data rate for perpendicular mode!\n"); ! 1172: cont->done(0); ! 1173: FDCS->reset = 1; /* convenient way to return to ! 1174: * redo without to much hassle (deep ! 1175: * stack et al. */ ! 1176: return; ! 1177: } ! 1178: } else ! 1179: perp_mode = 0; ! 1180: ! 1181: if (FDCS->perp_mode == perp_mode) ! 1182: return; ! 1183: if (FDCS->version >= FDC_82077_ORIG) { ! 1184: output_byte(FD_PERPENDICULAR); ! 1185: output_byte(perp_mode); ! 1186: FDCS->perp_mode = perp_mode; ! 1187: } else if (perp_mode) { ! 1188: DPRINT("perpendicular mode not supported by this FDC.\n"); ! 1189: } ! 1190: } /* perpendicular_mode */ ! 1191: ! 1192: static int fifo_depth = 0xa; ! 1193: static int no_fifo = 0; ! 1194: ! 1195: static int fdc_configure(void) ! 1196: { ! 1197: /* Turn on FIFO */ ! 1198: output_byte(FD_CONFIGURE); ! 1199: if(need_more_output() != MORE_OUTPUT) ! 1200: return 0; ! 1201: output_byte(0); ! 1202: output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); ! 1203: output_byte(0); /* pre-compensation from track ! 1204: 0 upwards */ ! 1205: return 1; ! 1206: } ! 1207: ! 1208: #define NOMINAL_DTR 500 ! 1209: ! 1210: /* Issue a "SPECIFY" command to set the step rate time, head unload time, ! 1211: * head load time, and DMA disable flag to values needed by floppy. ! 1212: * ! 1213: * The value "dtr" is the data transfer rate in Kbps. It is needed ! 1214: * to account for the data rate-based scaling done by the 82072 and 82077 ! 1215: * FDC types. This parameter is ignored for other types of FDCs (i.e. ! 1216: * 8272a). ! 1217: * ! 1218: * Note that changing the data transfer rate has a (probably deleterious) ! 1219: * effect on the parameters subject to scaling for 82072/82077 FDCs, so ! 1220: * fdc_specify is called again after each data transfer rate ! 1221: * change. ! 1222: * ! 1223: * srt: 1000 to 16000 in microseconds ! 1224: * hut: 16 to 240 milliseconds ! 1225: * hlt: 2 to 254 milliseconds ! 1226: * ! 1227: * These values are rounded up to the next highest available delay time. ! 1228: */ ! 1229: static void fdc_specify(void) ! 1230: { ! 1231: unsigned char spec1, spec2; ! 1232: int srt, hlt, hut; ! 1233: unsigned long dtr = NOMINAL_DTR; ! 1234: unsigned long scale_dtr = NOMINAL_DTR; ! 1235: int hlt_max_code = 0x7f; ! 1236: int hut_max_code = 0xf; ! 1237: ! 1238: if (FDCS->need_configure && FDCS->version >= FDC_82072A) { ! 1239: fdc_configure(); ! 1240: FDCS->need_configure = 0; ! 1241: /*DPRINT("FIFO enabled\n");*/ ! 1242: } ! 1243: ! 1244: switch (raw_cmd->rate & 0x03) { ! 1245: case 3: ! 1246: dtr = 1000; ! 1247: break; ! 1248: case 1: ! 1249: dtr = 300; ! 1250: if (FDCS->version >= FDC_82078) { ! 1251: /* chose the default rate table, not the one ! 1252: * where 1 = 2 Mbps */ ! 1253: output_byte(FD_DRIVESPEC); ! 1254: if(need_more_output() == MORE_OUTPUT) { ! 1255: output_byte(UNIT(current_drive)); ! 1256: output_byte(0xc0); ! 1257: } ! 1258: } ! 1259: break; ! 1260: case 2: ! 1261: dtr = 250; ! 1262: break; ! 1263: } ! 1264: ! 1265: if (FDCS->version >= FDC_82072) { ! 1266: scale_dtr = dtr; ! 1267: hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1268: hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ ! 1269: } ! 1270: ! 1271: /* Convert step rate from microseconds to milliseconds and 4 bits */ ! 1272: srt = 16 - (DP->srt*scale_dtr/1000 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1273: SUPBOUND(srt, 0xf); ! 1274: INFBOUND(srt, 0); ! 1275: ! 1276: hlt = (DP->hlt*scale_dtr/2 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1277: if (hlt < 0x01) ! 1278: hlt = 0x01; ! 1279: else if (hlt > 0x7f) ! 1280: hlt = hlt_max_code; ! 1281: ! 1282: hut = (DP->hut*scale_dtr/16 + NOMINAL_DTR - 1)/NOMINAL_DTR; ! 1283: if (hut < 0x1) ! 1284: hut = 0x1; ! 1285: else if (hut > 0xf) ! 1286: hut = hut_max_code; ! 1287: ! 1288: spec1 = (srt << 4) | hut; ! 1289: spec2 = (hlt << 1) | (use_virtual_dma & 1); ! 1290: ! 1291: /* If these parameters did not change, just return with success */ ! 1292: if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { ! 1293: /* Go ahead and set spec1 and spec2 */ ! 1294: output_byte(FD_SPECIFY); ! 1295: output_byte(FDCS->spec1 = spec1); ! 1296: output_byte(FDCS->spec2 = spec2); ! 1297: } ! 1298: } /* fdc_specify */ ! 1299: ! 1300: /* Set the FDC's data transfer rate on behalf of the specified drive. ! 1301: * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue ! 1302: * of the specify command (i.e. using the fdc_specify function). ! 1303: */ ! 1304: static int fdc_dtr(void) ! 1305: { ! 1306: /* If data rate not already set to desired value, set it. */ ! 1307: if ((raw_cmd->rate & 3) == FDCS->dtr) ! 1308: return 0; ! 1309: ! 1310: /* Set dtr */ ! 1311: fd_outb(raw_cmd->rate & 3, FD_DCR); ! 1312: ! 1313: /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) ! 1314: * need a stabilization period of several milliseconds to be ! 1315: * enforced after data rate changes before R/W operations. ! 1316: * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) ! 1317: */ ! 1318: FDCS->dtr = raw_cmd->rate & 3; ! 1319: return(wait_for_completion(jiffies+2*HZ/100, ! 1320: (timeout_fn) floppy_ready)); ! 1321: } /* fdc_dtr */ ! 1322: ! 1323: static void tell_sector(void) ! 1324: { ! 1325: printk(": track %d, head %d, sector %d, size %d", ! 1326: R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); ! 1327: } /* tell_sector */ ! 1328: ! 1329: ! 1330: /* ! 1331: * OK, this error interpreting routine is called after a ! 1332: * DMA read/write has succeeded ! 1333: * or failed, so we check the results, and copy any buffers. ! 1334: * hhb: Added better error reporting. ! 1335: * ak: Made this into a separate routine. ! 1336: */ ! 1337: static int interpret_errors(void) ! 1338: { ! 1339: char bad; ! 1340: ! 1341: if (inr!=7) { ! 1342: DPRINT("-- FDC reply error"); ! 1343: FDCS->reset = 1; ! 1344: return 1; ! 1345: } ! 1346: ! 1347: /* check IC to find cause of interrupt */ ! 1348: switch (ST0 & ST0_INTR) { ! 1349: case 0x40: /* error occurred during command execution */ ! 1350: if (ST1 & ST1_EOC) ! 1351: return 0; /* occurs with pseudo-DMA */ ! 1352: bad = 1; ! 1353: if (ST1 & ST1_WP) { ! 1354: DPRINT("Drive is write protected\n"); ! 1355: CLEARF(FD_DISK_WRITABLE); ! 1356: cont->done(0); ! 1357: bad = 2; ! 1358: } else if (ST1 & ST1_ND) { ! 1359: SETF(FD_NEED_TWADDLE); ! 1360: } else if (ST1 & ST1_OR) { ! 1361: if (DP->flags & FTD_MSG) ! 1362: DPRINT("Over/Underrun - retrying\n"); ! 1363: bad = 0; ! 1364: }else if (*errors >= DP->max_errors.reporting){ ! 1365: DPRINT(""); ! 1366: if (ST0 & ST0_ECE) { ! 1367: printk("Recalibrate failed!"); ! 1368: } else if (ST2 & ST2_CRC) { ! 1369: printk("data CRC error"); ! 1370: tell_sector(); ! 1371: } else if (ST1 & ST1_CRC) { ! 1372: printk("CRC error"); ! 1373: tell_sector(); ! 1374: } else if ((ST1 & (ST1_MAM|ST1_ND)) || (ST2 & ST2_MAM)) { ! 1375: if (!probing) { ! 1376: printk("sector not found"); ! 1377: tell_sector(); ! 1378: } else ! 1379: printk("probe failed..."); ! 1380: } else if (ST2 & ST2_WC) { /* seek error */ ! 1381: printk("wrong cylinder"); ! 1382: } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ ! 1383: printk("bad cylinder"); ! 1384: } else { ! 1385: printk("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", ST0, ST1, ST2); ! 1386: tell_sector(); ! 1387: } ! 1388: printk("\n"); ! 1389: ! 1390: } ! 1391: if (ST2 & ST2_WC || ST2 & ST2_BC) ! 1392: /* wrong cylinder => recal */ ! 1393: DRS->track = NEED_2_RECAL; ! 1394: return bad; ! 1395: case 0x80: /* invalid command given */ ! 1396: DPRINT("Invalid FDC command given!\n"); ! 1397: cont->done(0); ! 1398: return 2; ! 1399: case 0xc0: ! 1400: DPRINT("Abnormal termination caused by polling\n"); ! 1401: cont->error(); ! 1402: return 2; ! 1403: default: /* (0) Normal command termination */ ! 1404: return 0; ! 1405: } ! 1406: } ! 1407: ! 1408: /* ! 1409: * This routine is called when everything should be correctly set up ! 1410: * for the transfer (i.e. floppy motor is on, the correct floppy is ! 1411: * selected, and the head is sitting on the right track). ! 1412: */ ! 1413: static void setup_rw_floppy(void) ! 1414: { ! 1415: int i,ready_date,r, flags,dflags; ! 1416: timeout_fn function; ! 1417: ! 1418: flags = raw_cmd->flags; ! 1419: if (flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 1420: flags |= FD_RAW_INTR; ! 1421: ! 1422: if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)){ ! 1423: ready_date = DRS->spinup_date + DP->spinup; ! 1424: /* If spinup will take a long time, rerun scandrives ! 1425: * again just before spinup completion. Beware that ! 1426: * after scandrives, we must again wait for selection. ! 1427: */ ! 1428: if ((signed) (ready_date - jiffies) > DP->select_delay){ ! 1429: ready_date -= DP->select_delay; ! 1430: function = (timeout_fn) floppy_start; ! 1431: } else ! 1432: function = (timeout_fn) setup_rw_floppy; ! 1433: ! 1434: /* wait until the floppy is spinning fast enough */ ! 1435: if (wait_for_completion(ready_date,function)) ! 1436: return; ! 1437: } ! 1438: dflags = DRS->flags; ! 1439: ! 1440: if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) ! 1441: setup_DMA(); ! 1442: ! 1443: if (flags & FD_RAW_INTR) ! 1444: SET_INTR(main_command_interrupt); ! 1445: ! 1446: r=0; ! 1447: for (i=0; i< raw_cmd->cmd_count; i++) ! 1448: r|=output_byte(raw_cmd->cmd[i]); ! 1449: ! 1450: #ifdef DEBUGT ! 1451: debugt("rw_command: "); ! 1452: #endif ! 1453: if (r){ ! 1454: cont->error(); ! 1455: reset_fdc(); ! 1456: return; ! 1457: } ! 1458: ! 1459: if (!(flags & FD_RAW_INTR)){ ! 1460: inr = result(); ! 1461: cont->interrupt(); ! 1462: } else if (flags & FD_RAW_NEED_DISK) ! 1463: fd_watchdog(); ! 1464: } ! 1465: ! 1466: static int blind_seek; ! 1467: ! 1468: /* ! 1469: * This is the routine called after every seek (or recalibrate) interrupt ! 1470: * from the floppy controller. ! 1471: */ ! 1472: static void seek_interrupt(void) ! 1473: { ! 1474: #ifdef DEBUGT ! 1475: debugt("seek interrupt:"); ! 1476: #endif ! 1477: if (inr != 2 || (ST0 & 0xF8) != 0x20) { ! 1478: DPRINT("seek failed\n"); ! 1479: DRS->track = NEED_2_RECAL; ! 1480: cont->error(); ! 1481: cont->redo(); ! 1482: return; ! 1483: } ! 1484: if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek){ ! 1485: #ifdef DCL_DEBUG ! 1486: if (DP->flags & FD_DEBUG){ ! 1487: DPRINT("clearing NEWCHANGE flag because of effective seek\n"); ! 1488: DPRINT("jiffies=%ld\n", jiffies); ! 1489: } ! 1490: #endif ! 1491: CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ ! 1492: DRS->select_date = jiffies; ! 1493: } ! 1494: DRS->track = ST1; ! 1495: floppy_ready(); ! 1496: } ! 1497: ! 1498: static void check_wp(void) ! 1499: { ! 1500: if (TESTF(FD_VERIFY)) { ! 1501: /* check write protection */ ! 1502: output_byte(FD_GETSTATUS); ! 1503: output_byte(UNIT(current_drive)); ! 1504: if (result() != 1){ ! 1505: FDCS->reset = 1; ! 1506: return; ! 1507: } ! 1508: CLEARF(FD_VERIFY); ! 1509: CLEARF(FD_NEED_TWADDLE); ! 1510: #ifdef DCL_DEBUG ! 1511: if (DP->flags & FD_DEBUG){ ! 1512: DPRINT("checking whether disk is write protected\n"); ! 1513: DPRINT("wp=%x\n",ST3 & 0x40); ! 1514: } ! 1515: #endif ! 1516: if (!(ST3 & 0x40)) ! 1517: SETF(FD_DISK_WRITABLE); ! 1518: else ! 1519: CLEARF(FD_DISK_WRITABLE); ! 1520: } ! 1521: } ! 1522: ! 1523: static void seek_floppy(void) ! 1524: { ! 1525: int track; ! 1526: ! 1527: blind_seek=0; ! 1528: ! 1529: #ifdef DCL_DEBUG ! 1530: if (DP->flags & FD_DEBUG){ ! 1531: DPRINT("calling disk change from seek\n"); ! 1532: } ! 1533: #endif ! 1534: ! 1535: if (!TESTF(FD_DISK_NEWCHANGE) && ! 1536: disk_change(current_drive) && ! 1537: (raw_cmd->flags & FD_RAW_NEED_DISK)){ ! 1538: /* the media changed flag should be cleared after the seek. ! 1539: * If it isn't, this means that there is really no disk in ! 1540: * the drive. ! 1541: */ ! 1542: SETF(FD_DISK_CHANGED); ! 1543: cont->done(0); ! 1544: cont->redo(); ! 1545: return; ! 1546: } ! 1547: if (DRS->track <= NEED_1_RECAL){ ! 1548: recalibrate_floppy(); ! 1549: return; ! 1550: } else if (TESTF(FD_DISK_NEWCHANGE) && ! 1551: (raw_cmd->flags & FD_RAW_NEED_DISK) && ! 1552: (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { ! 1553: /* we seek to clear the media-changed condition. Does anybody ! 1554: * know a more elegant way, which works on all drives? */ ! 1555: if (raw_cmd->track) ! 1556: track = raw_cmd->track - 1; ! 1557: else { ! 1558: if (DP->flags & FD_SILENT_DCL_CLEAR){ ! 1559: set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); ! 1560: blind_seek = 1; ! 1561: raw_cmd->flags |= FD_RAW_NEED_SEEK; ! 1562: } ! 1563: track = 1; ! 1564: } ! 1565: } else { ! 1566: check_wp(); ! 1567: if (raw_cmd->track != DRS->track && ! 1568: (raw_cmd->flags & FD_RAW_NEED_SEEK)) ! 1569: track = raw_cmd->track; ! 1570: else { ! 1571: setup_rw_floppy(); ! 1572: return; ! 1573: } ! 1574: } ! 1575: ! 1576: SET_INTR(seek_interrupt); ! 1577: output_byte(FD_SEEK); ! 1578: output_byte(UNIT(current_drive)); ! 1579: LAST_OUT(track); ! 1580: #ifdef DEBUGT ! 1581: debugt("seek command:"); ! 1582: #endif ! 1583: } ! 1584: ! 1585: static void recal_interrupt(void) ! 1586: { ! 1587: #ifdef DEBUGT ! 1588: debugt("recal interrupt:"); ! 1589: #endif ! 1590: if (inr !=2) ! 1591: FDCS->reset = 1; ! 1592: else if (ST0 & ST0_ECE) { ! 1593: switch(DRS->track){ ! 1594: case NEED_1_RECAL: ! 1595: #ifdef DEBUGT ! 1596: debugt("recal interrupt need 1 recal:"); ! 1597: #endif ! 1598: /* after a second recalibrate, we still haven't ! 1599: * reached track 0. Probably no drive. Raise an ! 1600: * error, as failing immediately might upset ! 1601: * computers possessed by the Devil :-) */ ! 1602: cont->error(); ! 1603: cont->redo(); ! 1604: return; ! 1605: case NEED_2_RECAL: ! 1606: #ifdef DEBUGT ! 1607: debugt("recal interrupt need 2 recal:"); ! 1608: #endif ! 1609: /* If we already did a recalibrate, ! 1610: * and we are not at track 0, this ! 1611: * means we have moved. (The only way ! 1612: * not to move at recalibration is to ! 1613: * be already at track 0.) Clear the ! 1614: * new change flag */ ! 1615: #ifdef DCL_DEBUG ! 1616: if (DP->flags & FD_DEBUG){ ! 1617: DPRINT("clearing NEWCHANGE flag because of second recalibrate\n"); ! 1618: } ! 1619: #endif ! 1620: ! 1621: CLEARF(FD_DISK_NEWCHANGE); ! 1622: DRS->select_date = jiffies; ! 1623: /* fall through */ ! 1624: default: ! 1625: #ifdef DEBUGT ! 1626: debugt("recal interrupt default:"); ! 1627: #endif ! 1628: /* Recalibrate moves the head by at ! 1629: * most 80 steps. If after one ! 1630: * recalibrate we don't have reached ! 1631: * track 0, this might mean that we ! 1632: * started beyond track 80. Try ! 1633: * again. */ ! 1634: DRS->track = NEED_1_RECAL; ! 1635: break; ! 1636: } ! 1637: } else ! 1638: DRS->track = ST1; ! 1639: floppy_ready(); ! 1640: } ! 1641: ! 1642: static void print_result(char *message, int inr) ! 1643: { ! 1644: int i; ! 1645: ! 1646: DPRINT("%s ", message); ! 1647: if (inr >= 0) ! 1648: for (i=0; i<inr; i++) ! 1649: printk("repl[%d]=%x ", i, reply_buffer[i]); ! 1650: printk("\n"); ! 1651: } ! 1652: ! 1653: /* interrupt handler */ ! 1654: void floppy_interrupt(int irq, void *dev_id, struct pt_regs * regs) ! 1655: { ! 1656: void (*handler)(void) = DEVICE_INTR; ! 1657: int do_print; ! 1658: ! 1659: lasthandler = handler; ! 1660: interruptjiffies = jiffies; ! 1661: ! 1662: fd_disable_dma(); ! 1663: floppy_enable_hlt(); ! 1664: CLEAR_INTR; ! 1665: if (fdc >= N_FDC || FDCS->address == -1){ ! 1666: /* we don't even know which FDC is the culprit */ ! 1667: printk("DOR0=%x\n", fdc_state[0].dor); ! 1668: printk("floppy interrupt on bizarre fdc %d\n",fdc); ! 1669: printk("handler=%p\n", handler); ! 1670: is_alive("bizarre fdc"); ! 1671: return; ! 1672: } ! 1673: ! 1674: FDCS->reset = 0; ! 1675: /* We have to clear the reset flag here, because apparently on boxes ! 1676: * with level triggered interrupts (PS/2, Sparc, ...), it is needed to ! 1677: * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the ! 1678: * emission of the SENSEI's. ! 1679: * It is OK to emit floppy commands because we are in an interrupt ! 1680: * handler here, and thus we have to fear no interference of other ! 1681: * activity. ! 1682: */ ! 1683: ! 1684: do_print = !handler && print_unex && !initialising; ! 1685: ! 1686: inr = result(); ! 1687: if(do_print) ! 1688: print_result("unexpected interrupt", inr); ! 1689: if (inr == 0){ ! 1690: int max_sensei = 4; ! 1691: do { ! 1692: output_byte(FD_SENSEI); ! 1693: inr = result(); ! 1694: if(do_print) ! 1695: print_result("sensei", inr); ! 1696: max_sensei--; ! 1697: } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 && max_sensei); ! 1698: } ! 1699: if (handler) { ! 1700: if(intr_count >= 2) { ! 1701: /* expected interrupt */ ! 1702: floppy_tq.routine = (void *)(void *) handler; ! 1703: queue_task_irq(&floppy_tq, &tq_immediate); ! 1704: mark_bh(IMMEDIATE_BH); ! 1705: } else ! 1706: handler(); ! 1707: } else ! 1708: FDCS->reset = 1; ! 1709: is_alive("normal interrupt end"); ! 1710: } ! 1711: ! 1712: static void recalibrate_floppy(void) ! 1713: { ! 1714: #ifdef DEBUGT ! 1715: debugt("recalibrate floppy:"); ! 1716: #endif ! 1717: SET_INTR(recal_interrupt); ! 1718: output_byte(FD_RECALIBRATE); ! 1719: LAST_OUT(UNIT(current_drive)); ! 1720: } ! 1721: ! 1722: /* ! 1723: * Must do 4 FD_SENSEIs after reset because of ``drive polling''. ! 1724: */ ! 1725: static void reset_interrupt(void) ! 1726: { ! 1727: #ifdef DEBUGT ! 1728: debugt("reset interrupt:"); ! 1729: #endif ! 1730: result(); /* get the status ready for set_fdc */ ! 1731: if (FDCS->reset) { ! 1732: printk("reset set in interrupt, calling %p\n", cont->error); ! 1733: cont->error(); /* a reset just after a reset. BAD! */ ! 1734: } ! 1735: cont->redo(); ! 1736: } ! 1737: ! 1738: /* ! 1739: * reset is done by pulling bit 2 of DOR low for a while (old FDCs), ! 1740: * or by setting the self clearing bit 7 of STATUS (newer FDCs) ! 1741: */ ! 1742: static void reset_fdc(void) ! 1743: { ! 1744: SET_INTR(reset_interrupt); ! 1745: FDCS->reset = 0; ! 1746: reset_fdc_info(0); ! 1747: ! 1748: /* Pseudo-DMA may intercept 'reset finished' interrupt. */ ! 1749: /* Irrelevant for systems with true DMA (i386). */ ! 1750: fd_disable_dma(); ! 1751: ! 1752: if (FDCS->version >= FDC_82072A) ! 1753: fd_outb(0x80 | (FDCS->dtr &3), FD_STATUS); ! 1754: else { ! 1755: fd_outb(FDCS->dor & ~0x04, FD_DOR); ! 1756: udelay(FD_RESET_DELAY); ! 1757: fd_outb(FDCS->dor, FD_DOR); ! 1758: } ! 1759: } ! 1760: ! 1761: void show_floppy(void) ! 1762: { ! 1763: int i; ! 1764: ! 1765: printk("\n"); ! 1766: printk("floppy driver state\n"); ! 1767: printk("-------------------\n"); ! 1768: printk("now=%ld last interrupt=%d last called handler=%p\n", ! 1769: jiffies, interruptjiffies, lasthandler); ! 1770: ! 1771: ! 1772: #ifdef FLOPPY_SANITY_CHECK ! 1773: printk("timeout_message=%s\n", timeout_message); ! 1774: printk("last output bytes:\n"); ! 1775: for (i=0; i < OLOGSIZE; i++) ! 1776: printk("%2x %2x %ld\n", ! 1777: output_log[(i+output_log_pos) % OLOGSIZE].data, ! 1778: output_log[(i+output_log_pos) % OLOGSIZE].status, ! 1779: output_log[(i+output_log_pos) % OLOGSIZE].jiffies); ! 1780: printk("last result at %d\n", resultjiffies); ! 1781: printk("last redo_fd_request at %d\n", lastredo); ! 1782: for (i=0; i<resultsize; i++){ ! 1783: printk("%2x ", reply_buffer[i]); ! 1784: } ! 1785: printk("\n"); ! 1786: #endif ! 1787: ! 1788: printk("status=%x\n", fd_inb(FD_STATUS)); ! 1789: printk("fdc_busy=%d\n", fdc_busy); ! 1790: if (DEVICE_INTR) ! 1791: printk("DEVICE_INTR=%p\n", DEVICE_INTR); ! 1792: if (floppy_tq.sync) ! 1793: printk("floppy_tq.routine=%p\n", floppy_tq.routine); ! 1794: if (fd_timer.prev) ! 1795: printk("fd_timer.function=%p\n", fd_timer.function); ! 1796: if (fd_timeout.prev){ ! 1797: printk("timer_table=%p\n",fd_timeout.function); ! 1798: printk("expires=%ld\n",fd_timeout.expires-jiffies); ! 1799: printk("now=%ld\n",jiffies); ! 1800: } ! 1801: printk("cont=%p\n", cont); ! 1802: printk("CURRENT=%p\n", CURRENT); ! 1803: printk("command_status=%d\n", command_status); ! 1804: printk("\n"); ! 1805: } ! 1806: ! 1807: static void floppy_shutdown(void) ! 1808: { ! 1809: if (!initialising) ! 1810: show_floppy(); ! 1811: cancel_activity(); ! 1812: sti(); ! 1813: ! 1814: floppy_enable_hlt(); ! 1815: fd_disable_dma(); ! 1816: /* avoid dma going to a random drive after shutdown */ ! 1817: ! 1818: if (!initialising) ! 1819: DPRINT("floppy timeout called\n"); ! 1820: FDCS->reset = 1; ! 1821: if (cont){ ! 1822: cont->done(0); ! 1823: cont->redo(); /* this will recall reset when needed */ ! 1824: } else { ! 1825: printk("no cont in shutdown!\n"); ! 1826: process_fd_request(); ! 1827: } ! 1828: is_alive("floppy shutdown"); ! 1829: } ! 1830: /*typedef void (*timeout_fn)(unsigned long);*/ ! 1831: ! 1832: /* start motor, check media-changed condition and write protection */ ! 1833: static int start_motor(void (*function)(void) ) ! 1834: { ! 1835: int mask, data; ! 1836: ! 1837: mask = 0xfc; ! 1838: data = UNIT(current_drive); ! 1839: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)){ ! 1840: if (!(FDCS->dor & (0x10 << UNIT(current_drive)))){ ! 1841: set_debugt(); ! 1842: /* no read since this drive is running */ ! 1843: DRS->first_read_date = 0; ! 1844: /* note motor start time if motor is not yet running */ ! 1845: DRS->spinup_date = jiffies; ! 1846: data |= (0x10 << UNIT(current_drive)); ! 1847: } ! 1848: } else ! 1849: if (FDCS->dor & (0x10 << UNIT(current_drive))) ! 1850: mask &= ~(0x10 << UNIT(current_drive)); ! 1851: ! 1852: /* starts motor and selects floppy */ ! 1853: del_timer(motor_off_timer + current_drive); ! 1854: set_dor(fdc, mask, data); ! 1855: ! 1856: /* wait_for_completion also schedules reset if needed. */ ! 1857: return(wait_for_completion(DRS->select_date+DP->select_delay, ! 1858: (timeout_fn) function)); ! 1859: } ! 1860: ! 1861: static void floppy_ready(void) ! 1862: { ! 1863: CHECK_RESET; ! 1864: if (start_motor(floppy_ready)) return; ! 1865: if (fdc_dtr()) return; ! 1866: ! 1867: #ifdef DCL_DEBUG ! 1868: if (DP->flags & FD_DEBUG){ ! 1869: DPRINT("calling disk change from floppy_ready\n"); ! 1870: } ! 1871: #endif ! 1872: ! 1873: if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && ! 1874: disk_change(current_drive) && ! 1875: !DP->select_delay) ! 1876: twaddle(); /* this clears the dcl on certain drive/controller ! 1877: * combinations */ ! 1878: ! 1879: if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)){ ! 1880: perpendicular_mode(); ! 1881: fdc_specify(); /* must be done here because of hut, hlt ... */ ! 1882: seek_floppy(); ! 1883: } else ! 1884: setup_rw_floppy(); ! 1885: } ! 1886: ! 1887: static void floppy_start(void) ! 1888: { ! 1889: reschedule_timeout(CURRENTD, "floppy start", 0); ! 1890: ! 1891: scandrives(); ! 1892: #ifdef DCL_DEBUG ! 1893: if (DP->flags & FD_DEBUG){ ! 1894: DPRINT("setting NEWCHANGE in floppy_start\n"); ! 1895: } ! 1896: #endif ! 1897: SETF(FD_DISK_NEWCHANGE); ! 1898: floppy_ready(); ! 1899: } ! 1900: ! 1901: /* ! 1902: * ======================================================================== ! 1903: * here ends the bottom half. Exported routines are: ! 1904: * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, ! 1905: * start_motor, reset_fdc, reset_fdc_info, interpret_errors. ! 1906: * Initialization also uses output_byte, result, set_dor, floppy_interrupt ! 1907: * and set_dor. ! 1908: * ======================================================================== ! 1909: */ ! 1910: /* ! 1911: * General purpose continuations. ! 1912: * ============================== ! 1913: */ ! 1914: ! 1915: static void do_wakeup(void) ! 1916: { ! 1917: reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); ! 1918: cont = 0; ! 1919: command_status += 2; ! 1920: wake_up(&command_done); ! 1921: } ! 1922: ! 1923: static struct cont_t wakeup_cont={ ! 1924: empty, ! 1925: do_wakeup, ! 1926: empty, ! 1927: (done_f)empty ! 1928: }; ! 1929: ! 1930: ! 1931: static struct cont_t intr_cont={ ! 1932: empty, ! 1933: process_fd_request, ! 1934: empty, ! 1935: (done_f) empty ! 1936: }; ! 1937: ! 1938: static int wait_til_done(void (*handler)(void), int interruptible) ! 1939: { ! 1940: int ret; ! 1941: unsigned long flags; ! 1942: ! 1943: floppy_tq.routine = (void *)(void *) handler; ! 1944: queue_task(&floppy_tq, &tq_immediate); ! 1945: mark_bh(IMMEDIATE_BH); ! 1946: INT_OFF; ! 1947: while(command_status < 2 && NO_SIGNAL){ ! 1948: is_alive("wait_til_done"); ! 1949: if (interruptible) ! 1950: interruptible_sleep_on(&command_done); ! 1951: else ! 1952: sleep_on(&command_done); ! 1953: } ! 1954: if (command_status < 2){ ! 1955: cancel_activity(); ! 1956: cont = &intr_cont; ! 1957: reset_fdc(); ! 1958: INT_ON; ! 1959: return -EINTR; ! 1960: } ! 1961: INT_ON; ! 1962: ! 1963: if (FDCS->reset) ! 1964: command_status = FD_COMMAND_ERROR; ! 1965: if (command_status == FD_COMMAND_OKAY) ! 1966: ret=0; ! 1967: else ! 1968: ret=-EIO; ! 1969: command_status = FD_COMMAND_NONE; ! 1970: return ret; ! 1971: } ! 1972: ! 1973: static void generic_done(int result) ! 1974: { ! 1975: command_status = result; ! 1976: cont = &wakeup_cont; ! 1977: } ! 1978: ! 1979: static void generic_success(void) ! 1980: { ! 1981: cont->done(1); ! 1982: } ! 1983: ! 1984: static void generic_failure(void) ! 1985: { ! 1986: cont->done(0); ! 1987: } ! 1988: ! 1989: static void success_and_wakeup(void) ! 1990: { ! 1991: generic_success(); ! 1992: cont->redo(); ! 1993: } ! 1994: ! 1995: ! 1996: /* ! 1997: * formatting and rw support. ! 1998: * ========================== ! 1999: */ ! 2000: ! 2001: static int next_valid_format(void) ! 2002: { ! 2003: int probed_format; ! 2004: ! 2005: probed_format = DRS->probed_format; ! 2006: while(1){ ! 2007: if (probed_format >= 8 || ! 2008: !DP->autodetect[probed_format]){ ! 2009: DRS->probed_format = 0; ! 2010: return 1; ! 2011: } ! 2012: if (floppy_type[DP->autodetect[probed_format]].sect){ ! 2013: DRS->probed_format = probed_format; ! 2014: return 0; ! 2015: } ! 2016: probed_format++; ! 2017: } ! 2018: } ! 2019: ! 2020: static void bad_flp_intr(void) ! 2021: { ! 2022: if (probing){ ! 2023: DRS->probed_format++; ! 2024: if (!next_valid_format()) ! 2025: return; ! 2026: } ! 2027: (*errors)++; ! 2028: INFBOUND(DRWE->badness, *errors); ! 2029: if (*errors > DP->max_errors.abort) ! 2030: cont->done(0); ! 2031: if (*errors > DP->max_errors.reset) ! 2032: FDCS->reset = 1; ! 2033: else if (*errors > DP->max_errors.recal) ! 2034: DRS->track = NEED_2_RECAL; ! 2035: } ! 2036: ! 2037: static void set_floppy(kdev_t device) ! 2038: { ! 2039: if (TYPE(device)) ! 2040: _floppy = TYPE(device) + floppy_type; ! 2041: else ! 2042: _floppy = current_type[ DRIVE(device) ]; ! 2043: } ! 2044: ! 2045: /* ! 2046: * formatting support. ! 2047: * =================== ! 2048: */ ! 2049: static void format_interrupt(void) ! 2050: { ! 2051: switch (interpret_errors()){ ! 2052: case 1: ! 2053: cont->error(); ! 2054: case 2: ! 2055: break; ! 2056: case 0: ! 2057: cont->done(1); ! 2058: } ! 2059: cont->redo(); ! 2060: } ! 2061: ! 2062: #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) ! 2063: #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) ! 2064: #define CT(x) ((x) | 0x40) ! 2065: static void setup_format_params(int track) ! 2066: { ! 2067: struct fparm { ! 2068: unsigned char track,head,sect,size; ! 2069: } *here = (struct fparm *)floppy_track_buffer; ! 2070: int il,n; ! 2071: int count,head_shift,track_shift; ! 2072: ! 2073: raw_cmd = &default_raw_cmd; ! 2074: raw_cmd->track = track; ! 2075: ! 2076: raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | ! 2077: FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; ! 2078: raw_cmd->rate = _floppy->rate & 0x43; ! 2079: raw_cmd->cmd_count = NR_F; ! 2080: COMMAND = FM_MODE(_floppy,FD_FORMAT); ! 2081: DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,format_req.head); ! 2082: F_SIZECODE = FD_SIZECODE(_floppy); ! 2083: F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; ! 2084: F_GAP = _floppy->fmt_gap; ! 2085: F_FILL = FD_FILL_BYTE; ! 2086: ! 2087: raw_cmd->kernel_data = floppy_track_buffer; ! 2088: raw_cmd->length = 4 * F_SECT_PER_TRACK; ! 2089: ! 2090: /* allow for about 30ms for data transport per track */ ! 2091: head_shift = (F_SECT_PER_TRACK + 5) / 6; ! 2092: ! 2093: /* a ``cylinder'' is two tracks plus a little stepping time */ ! 2094: track_shift = 2 * head_shift + 3; ! 2095: ! 2096: /* position of logical sector 1 on this track */ ! 2097: n = (track_shift * format_req.track + head_shift * format_req.head) ! 2098: % F_SECT_PER_TRACK; ! 2099: ! 2100: /* determine interleave */ ! 2101: il = 1; ! 2102: if (_floppy->fmt_gap < 0x22) ! 2103: il++; ! 2104: ! 2105: /* initialize field */ ! 2106: for (count = 0; count < F_SECT_PER_TRACK; ++count) { ! 2107: here[count].track = format_req.track; ! 2108: here[count].head = format_req.head; ! 2109: here[count].sect = 0; ! 2110: here[count].size = F_SIZECODE; ! 2111: } ! 2112: /* place logical sectors */ ! 2113: for (count = 1; count <= F_SECT_PER_TRACK; ++count) { ! 2114: here[n].sect = count; ! 2115: n = (n+il) % F_SECT_PER_TRACK; ! 2116: if (here[n].sect) { /* sector busy, find next free sector */ ! 2117: ++n; ! 2118: if (n>= F_SECT_PER_TRACK) { ! 2119: n-=F_SECT_PER_TRACK; ! 2120: while (here[n].sect) ++n; ! 2121: } ! 2122: } ! 2123: } ! 2124: } ! 2125: ! 2126: static void redo_format(void) ! 2127: { ! 2128: buffer_track = -1; ! 2129: setup_format_params(format_req.track << STRETCH(_floppy)); ! 2130: floppy_start(); ! 2131: #ifdef DEBUGT ! 2132: debugt("queue format request"); ! 2133: #endif ! 2134: } ! 2135: ! 2136: static struct cont_t format_cont={ ! 2137: format_interrupt, ! 2138: redo_format, ! 2139: bad_flp_intr, ! 2140: generic_done }; ! 2141: ! 2142: static int do_format(kdev_t device, struct format_descr *tmp_format_req) ! 2143: { ! 2144: int ret; ! 2145: int drive=DRIVE(device); ! 2146: ! 2147: LOCK_FDC(drive,1); ! 2148: set_floppy(device); ! 2149: if (!_floppy || ! 2150: _floppy->track > DP->tracks || ! 2151: tmp_format_req->track >= _floppy->track || ! 2152: tmp_format_req->head >= _floppy->head || ! 2153: (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || ! 2154: !_floppy->fmt_gap) { ! 2155: process_fd_request(); ! 2156: return -EINVAL; ! 2157: } ! 2158: format_req = *tmp_format_req; ! 2159: format_errors = 0; ! 2160: cont = &format_cont; ! 2161: errors = &format_errors; ! 2162: IWAIT(redo_format); ! 2163: process_fd_request(); ! 2164: return ret; ! 2165: } ! 2166: ! 2167: /* ! 2168: * Buffer read/write and support ! 2169: * ============================= ! 2170: */ ! 2171: ! 2172: /* new request_done. Can handle physical sectors which are smaller than a ! 2173: * logical buffer */ ! 2174: static void request_done(int uptodate) ! 2175: { ! 2176: int block; ! 2177: ! 2178: probing = 0; ! 2179: reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); ! 2180: ! 2181: if (!CURRENT){ ! 2182: DPRINT("request list destroyed in floppy request done\n"); ! 2183: return; ! 2184: } ! 2185: ! 2186: if (uptodate){ ! 2187: /* maintain values for invalidation on geometry ! 2188: * change */ ! 2189: block = current_count_sectors + CURRENT->sector; ! 2190: INFBOUND(DRS->maxblock, block); ! 2191: if (block > _floppy->sect) ! 2192: DRS->maxtrack = 1; ! 2193: ! 2194: /* unlock chained buffers */ ! 2195: while (current_count_sectors && CURRENT && ! 2196: current_count_sectors >= CURRENT->current_nr_sectors){ ! 2197: current_count_sectors -= CURRENT->current_nr_sectors; ! 2198: CURRENT->nr_sectors -= CURRENT->current_nr_sectors; ! 2199: CURRENT->sector += CURRENT->current_nr_sectors; ! 2200: end_request(1); ! 2201: } ! 2202: if (current_count_sectors && CURRENT){ ! 2203: /* "unlock" last subsector */ ! 2204: CURRENT->buffer += current_count_sectors <<9; ! 2205: CURRENT->current_nr_sectors -= current_count_sectors; ! 2206: CURRENT->nr_sectors -= current_count_sectors; ! 2207: CURRENT->sector += current_count_sectors; ! 2208: return; ! 2209: } ! 2210: ! 2211: if (current_count_sectors && !CURRENT) ! 2212: DPRINT("request list destroyed in floppy request done\n"); ! 2213: ! 2214: } else { ! 2215: if (CURRENT->cmd == WRITE) { ! 2216: /* record write error information */ ! 2217: DRWE->write_errors++; ! 2218: if (DRWE->write_errors == 1) { ! 2219: DRWE->first_error_sector = CURRENT->sector; ! 2220: DRWE->first_error_generation = DRS->generation; ! 2221: } ! 2222: DRWE->last_error_sector = CURRENT->sector; ! 2223: DRWE->last_error_generation = DRS->generation; ! 2224: } ! 2225: end_request(0); ! 2226: } ! 2227: } ! 2228: ! 2229: /* Interrupt handler evaluating the result of the r/w operation */ ! 2230: static void rw_interrupt(void) ! 2231: { ! 2232: int nr_sectors, ssize, eoc; ! 2233: ! 2234: if (!DRS->first_read_date) ! 2235: DRS->first_read_date = jiffies; ! 2236: ! 2237: nr_sectors = 0; ! 2238: CODE2SIZE; ! 2239: ! 2240: if(ST1 & ST1_EOC) ! 2241: eoc = 1; ! 2242: else ! 2243: eoc = 0; ! 2244: nr_sectors = ((R_TRACK-TRACK)*_floppy->head+R_HEAD-HEAD) * ! 2245: _floppy->sect + ((R_SECTOR-SECTOR+eoc) << SIZECODE >> 2) - ! 2246: (sector_t % _floppy->sect) % ssize; ! 2247: ! 2248: #ifdef FLOPPY_SANITY_CHECK ! 2249: if (nr_sectors > current_count_sectors + ssize - ! 2250: (current_count_sectors + sector_t) % ssize + ! 2251: sector_t % ssize){ ! 2252: DPRINT("long rw: %x instead of %lx\n", ! 2253: nr_sectors, current_count_sectors); ! 2254: printk("rs=%d s=%d\n", R_SECTOR, SECTOR); ! 2255: printk("rh=%d h=%d\n", R_HEAD, HEAD); ! 2256: printk("rt=%d t=%d\n", R_TRACK, TRACK); ! 2257: printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, ! 2258: sector_t, ssize); ! 2259: } ! 2260: #endif ! 2261: INFBOUND(nr_sectors,0); ! 2262: SUPBOUND(current_count_sectors, nr_sectors); ! 2263: ! 2264: switch (interpret_errors()){ ! 2265: case 2: ! 2266: cont->redo(); ! 2267: return; ! 2268: case 1: ! 2269: if (!current_count_sectors){ ! 2270: cont->error(); ! 2271: cont->redo(); ! 2272: return; ! 2273: } ! 2274: break; ! 2275: case 0: ! 2276: if (!current_count_sectors){ ! 2277: cont->redo(); ! 2278: return; ! 2279: } ! 2280: current_type[current_drive] = _floppy; ! 2281: floppy_sizes[TOMINOR(current_drive) ]= _floppy->size>>1; ! 2282: break; ! 2283: } ! 2284: ! 2285: if (probing) { ! 2286: if (DP->flags & FTD_MSG) ! 2287: DPRINT("Auto-detected floppy type %s in fd%d\n", ! 2288: _floppy->name,current_drive); ! 2289: current_type[current_drive] = _floppy; ! 2290: floppy_sizes[TOMINOR(current_drive)] = _floppy->size >> 1; ! 2291: probing = 0; ! 2292: } ! 2293: ! 2294: if (CT(COMMAND) != FD_READ || ! 2295: raw_cmd->kernel_data == CURRENT->buffer){ ! 2296: /* transfer directly from buffer */ ! 2297: cont->done(1); ! 2298: } else if (CT(COMMAND) == FD_READ){ ! 2299: buffer_track = raw_cmd->track; ! 2300: buffer_drive = current_drive; ! 2301: INFBOUND(buffer_max, nr_sectors + sector_t); ! 2302: } ! 2303: cont->redo(); ! 2304: } ! 2305: ! 2306: /* Compute maximal contiguous buffer size. */ ! 2307: static int buffer_chain_size(void) ! 2308: { ! 2309: struct buffer_head *bh; ! 2310: int size; ! 2311: char *base; ! 2312: ! 2313: base = CURRENT->buffer; ! 2314: size = CURRENT->current_nr_sectors << 9; ! 2315: bh = CURRENT->bh; ! 2316: ! 2317: if (bh){ ! 2318: bh = bh->b_reqnext; ! 2319: while (bh && bh->b_data == base + size){ ! 2320: size += bh->b_size; ! 2321: bh = bh->b_reqnext; ! 2322: } ! 2323: } ! 2324: return size >> 9; ! 2325: } ! 2326: ! 2327: /* Compute the maximal transfer size */ ! 2328: static int transfer_size(int ssize, int max_sector, int max_size) ! 2329: { ! 2330: SUPBOUND(max_sector, sector_t + max_size); ! 2331: ! 2332: /* alignment */ ! 2333: max_sector -= (max_sector % _floppy->sect) % ssize; ! 2334: ! 2335: /* transfer size, beginning not aligned */ ! 2336: current_count_sectors = max_sector - sector_t ; ! 2337: ! 2338: return max_sector; ! 2339: } ! 2340: ! 2341: /* ! 2342: * Move data from/to the track buffer to/from the buffer cache. ! 2343: */ ! 2344: static void copy_buffer(int ssize, int max_sector, int max_sector_2) ! 2345: { ! 2346: int remaining; /* number of transferred 512-byte sectors */ ! 2347: struct buffer_head *bh; ! 2348: char *buffer, *dma_buffer; ! 2349: int size; ! 2350: ! 2351: max_sector = transfer_size(ssize, ! 2352: minimum(max_sector, max_sector_2), ! 2353: CURRENT->nr_sectors); ! 2354: ! 2355: if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && ! 2356: buffer_max > sector_t + CURRENT->nr_sectors) ! 2357: current_count_sectors = minimum(buffer_max - sector_t, ! 2358: CURRENT->nr_sectors); ! 2359: ! 2360: remaining = current_count_sectors << 9; ! 2361: #ifdef FLOPPY_SANITY_CHECK ! 2362: if ((remaining >> 9) > CURRENT->nr_sectors && ! 2363: CT(COMMAND) == FD_WRITE){ ! 2364: DPRINT("in copy buffer\n"); ! 2365: printk("current_count_sectors=%ld\n", current_count_sectors); ! 2366: printk("remaining=%d\n", remaining >> 9); ! 2367: printk("CURRENT->nr_sectors=%ld\n",CURRENT->nr_sectors); ! 2368: printk("CURRENT->current_nr_sectors=%ld\n", ! 2369: CURRENT->current_nr_sectors); ! 2370: printk("max_sector=%d\n", max_sector); ! 2371: printk("ssize=%d\n", ssize); ! 2372: } ! 2373: #endif ! 2374: ! 2375: buffer_max = maximum(max_sector, buffer_max); ! 2376: ! 2377: dma_buffer = floppy_track_buffer + ((sector_t - buffer_min) << 9); ! 2378: ! 2379: bh = CURRENT->bh; ! 2380: size = CURRENT->current_nr_sectors << 9; ! 2381: buffer = CURRENT->buffer; ! 2382: ! 2383: while (remaining > 0){ ! 2384: SUPBOUND(size, remaining); ! 2385: #ifdef FLOPPY_SANITY_CHECK ! 2386: if (dma_buffer + size > ! 2387: floppy_track_buffer + (max_buffer_sectors << 10) || ! 2388: dma_buffer < floppy_track_buffer){ ! 2389: DPRINT("buffer overrun in copy buffer %d\n", ! 2390: (int) ((floppy_track_buffer - dma_buffer) >>9)); ! 2391: printk("sector_t=%d buffer_min=%d\n", ! 2392: sector_t, buffer_min); ! 2393: printk("current_count_sectors=%ld\n", ! 2394: current_count_sectors); ! 2395: if (CT(COMMAND) == FD_READ) ! 2396: printk("read\n"); ! 2397: if (CT(COMMAND) == FD_READ) ! 2398: printk("write\n"); ! 2399: break; ! 2400: } ! 2401: if (((unsigned long)buffer) % 512) ! 2402: DPRINT("%p buffer not aligned\n", buffer); ! 2403: #endif ! 2404: if (CT(COMMAND) == FD_READ) ! 2405: memcpy(buffer, dma_buffer, size); ! 2406: else ! 2407: memcpy(dma_buffer, buffer, size); ! 2408: remaining -= size; ! 2409: if (!remaining) ! 2410: break; ! 2411: ! 2412: dma_buffer += size; ! 2413: bh = bh->b_reqnext; ! 2414: #ifdef FLOPPY_SANITY_CHECK ! 2415: if (!bh){ ! 2416: DPRINT("bh=null in copy buffer after copy\n"); ! 2417: break; ! 2418: } ! 2419: #endif ! 2420: size = bh->b_size; ! 2421: buffer = bh->b_data; ! 2422: } ! 2423: #ifdef FLOPPY_SANITY_CHECK ! 2424: if (remaining){ ! 2425: if (remaining > 0) ! 2426: max_sector -= remaining >> 9; ! 2427: DPRINT("weirdness: remaining %d\n", remaining>>9); ! 2428: } ! 2429: #endif ! 2430: } ! 2431: ! 2432: /* ! 2433: * Formulate a read/write request. ! 2434: * this routine decides where to load the data (directly to buffer, or to ! 2435: * tmp floppy area), how much data to load (the size of the buffer, the whole ! 2436: * track, or a single sector) ! 2437: * All floppy_track_buffer handling goes in here. If we ever add track buffer ! 2438: * allocation on the fly, it should be done here. No other part should need ! 2439: * modification. ! 2440: */ ! 2441: ! 2442: static int make_raw_rw_request(void) ! 2443: { ! 2444: int aligned_sector_t; ! 2445: int max_sector, max_size, tracksize, ssize; ! 2446: ! 2447: set_fdc(DRIVE(CURRENT->rq_dev)); ! 2448: ! 2449: raw_cmd = &default_raw_cmd; ! 2450: raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | ! 2451: FD_RAW_NEED_SEEK; ! 2452: raw_cmd->cmd_count = NR_RW; ! 2453: if (CURRENT->cmd == READ){ ! 2454: raw_cmd->flags |= FD_RAW_READ; ! 2455: COMMAND = FM_MODE(_floppy,FD_READ); ! 2456: } else if (CURRENT->cmd == WRITE){ ! 2457: raw_cmd->flags |= FD_RAW_WRITE; ! 2458: COMMAND = FM_MODE(_floppy,FD_WRITE); ! 2459: } else { ! 2460: DPRINT("make_raw_rw_request: unknown command\n"); ! 2461: return 0; ! 2462: } ! 2463: ! 2464: max_sector = _floppy->sect * _floppy->head; ! 2465: ! 2466: TRACK = CURRENT->sector / max_sector; ! 2467: sector_t = CURRENT->sector % max_sector; ! 2468: if (_floppy->track && TRACK >= _floppy->track) ! 2469: return 0; ! 2470: HEAD = sector_t / _floppy->sect; ! 2471: ! 2472: if (((_floppy->stretch & FD_SWAPSIDES) || TESTF(FD_NEED_TWADDLE)) && ! 2473: sector_t < _floppy->sect) ! 2474: max_sector = _floppy->sect; ! 2475: ! 2476: /* 2M disks have phantom sectors on the first track */ ! 2477: if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)){ ! 2478: max_sector = 2 * _floppy->sect / 3; ! 2479: if (sector_t >= max_sector){ ! 2480: current_count_sectors = minimum(_floppy->sect - sector_t, ! 2481: CURRENT->nr_sectors); ! 2482: return 1; ! 2483: } ! 2484: SIZECODE = 2; ! 2485: } else ! 2486: SIZECODE = FD_SIZECODE(_floppy); ! 2487: raw_cmd->rate = _floppy->rate & 0x43; ! 2488: if ((_floppy->rate & FD_2M) && ! 2489: (TRACK || HEAD) && ! 2490: raw_cmd->rate == 2) ! 2491: raw_cmd->rate = 1; ! 2492: ! 2493: if (SIZECODE) ! 2494: SIZECODE2 = 0xff; ! 2495: else ! 2496: SIZECODE2 = 0x80; ! 2497: raw_cmd->track = TRACK << STRETCH(_floppy); ! 2498: DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy,HEAD); ! 2499: GAP = _floppy->gap; ! 2500: CODE2SIZE; ! 2501: SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; ! 2502: SECTOR = ((sector_t % _floppy->sect) << 2 >> SIZECODE) + 1; ! 2503: tracksize = _floppy->sect - _floppy->sect % ssize; ! 2504: if (tracksize < _floppy->sect){ ! 2505: SECT_PER_TRACK ++; ! 2506: if (tracksize <= sector_t % _floppy->sect) ! 2507: SECTOR--; ! 2508: while (tracksize <= sector_t % _floppy->sect){ ! 2509: while(tracksize + ssize > _floppy->sect){ ! 2510: SIZECODE--; ! 2511: ssize >>= 1; ! 2512: } ! 2513: SECTOR++; SECT_PER_TRACK ++; ! 2514: tracksize += ssize; ! 2515: } ! 2516: max_sector = HEAD * _floppy->sect + tracksize; ! 2517: } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) ! 2518: max_sector = _floppy->sect; ! 2519: ! 2520: aligned_sector_t = sector_t - (sector_t % _floppy->sect) % ssize; ! 2521: max_size = CURRENT->nr_sectors; ! 2522: if ((raw_cmd->track == buffer_track) && ! 2523: (current_drive == buffer_drive) && ! 2524: (sector_t >= buffer_min) && (sector_t < buffer_max)) { ! 2525: /* data already in track buffer */ ! 2526: if (CT(COMMAND) == FD_READ) { ! 2527: copy_buffer(1, max_sector, buffer_max); ! 2528: return 1; ! 2529: } ! 2530: } else if (aligned_sector_t != sector_t || CURRENT->nr_sectors < ssize){ ! 2531: if (CT(COMMAND) == FD_WRITE){ ! 2532: if (sector_t + CURRENT->nr_sectors > ssize && ! 2533: sector_t + CURRENT->nr_sectors < ssize + ssize) ! 2534: max_size = ssize + ssize; ! 2535: else ! 2536: max_size = ssize; ! 2537: } ! 2538: raw_cmd->flags &= ~FD_RAW_WRITE; ! 2539: raw_cmd->flags |= FD_RAW_READ; ! 2540: COMMAND = FM_MODE(_floppy,FD_READ); ! 2541: } else if ((unsigned long)CURRENT->buffer < MAX_DMA_ADDRESS) { ! 2542: unsigned long dma_limit; ! 2543: int direct, indirect; ! 2544: ! 2545: indirect= transfer_size(ssize,max_sector,max_buffer_sectors*2) - ! 2546: sector_t; ! 2547: ! 2548: /* ! 2549: * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide ! 2550: * on a 64 bit machine! ! 2551: */ ! 2552: max_size = buffer_chain_size(); ! 2553: dma_limit = (MAX_DMA_ADDRESS - ((unsigned long) CURRENT->buffer)) >> 9; ! 2554: if ((unsigned long) max_size > dma_limit) { ! 2555: max_size = dma_limit; ! 2556: } ! 2557: /* 64 kb boundaries */ ! 2558: if (CROSS_64KB(CURRENT->buffer, max_size << 9)) ! 2559: max_size = (K_64 - ((long) CURRENT->buffer) % K_64)>>9; ! 2560: direct = transfer_size(ssize,max_sector,max_size) - sector_t; ! 2561: /* ! 2562: * We try to read tracks, but if we get too many errors, we ! 2563: * go back to reading just one sector at a time. ! 2564: * ! 2565: * This means we should be able to read a sector even if there ! 2566: * are other bad sectors on this track. ! 2567: */ ! 2568: if (!direct || ! 2569: (indirect * 2 > direct * 3 && ! 2570: *errors < DP->max_errors.read_track && ! 2571: /*!TESTF(FD_NEED_TWADDLE) &&*/ ! 2572: ((!probing || (DP->read_track&(1<<DRS->probed_format)))))){ ! 2573: max_size = CURRENT->nr_sectors; ! 2574: } else { ! 2575: raw_cmd->kernel_data = CURRENT->buffer; ! 2576: raw_cmd->length = current_count_sectors << 9; ! 2577: if (raw_cmd->length == 0){ ! 2578: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2579: DPRINT("indirect=%d direct=%d sector_t=%d", ! 2580: indirect, direct, sector_t); ! 2581: return 0; ! 2582: } ! 2583: return 2; ! 2584: } ! 2585: } ! 2586: ! 2587: if (CT(COMMAND) == FD_READ) ! 2588: max_size = max_sector; /* unbounded */ ! 2589: ! 2590: /* claim buffer track if needed */ ! 2591: if (buffer_track != raw_cmd->track || /* bad track */ ! 2592: buffer_drive !=current_drive || /* bad drive */ ! 2593: sector_t > buffer_max || ! 2594: sector_t < buffer_min || ! 2595: ((CT(COMMAND) == FD_READ || ! 2596: (aligned_sector_t == sector_t && CURRENT->nr_sectors >= ssize))&& ! 2597: max_sector > 2 * max_buffer_sectors + buffer_min && ! 2598: max_size + sector_t > 2 * max_buffer_sectors + buffer_min) ! 2599: /* not enough space */){ ! 2600: buffer_track = -1; ! 2601: buffer_drive = current_drive; ! 2602: buffer_max = buffer_min = aligned_sector_t; ! 2603: } ! 2604: raw_cmd->kernel_data = floppy_track_buffer + ! 2605: ((aligned_sector_t-buffer_min)<<9); ! 2606: ! 2607: if (CT(COMMAND) == FD_WRITE){ ! 2608: /* copy write buffer to track buffer. ! 2609: * if we get here, we know that the write ! 2610: * is either aligned or the data already in the buffer ! 2611: * (buffer will be overwritten) */ ! 2612: #ifdef FLOPPY_SANITY_CHECK ! 2613: if (sector_t != aligned_sector_t && buffer_track == -1) ! 2614: DPRINT("internal error offset !=0 on write\n"); ! 2615: #endif ! 2616: buffer_track = raw_cmd->track; ! 2617: buffer_drive = current_drive; ! 2618: copy_buffer(ssize, max_sector, 2*max_buffer_sectors+buffer_min); ! 2619: } else ! 2620: transfer_size(ssize, max_sector, ! 2621: 2*max_buffer_sectors+buffer_min-aligned_sector_t); ! 2622: ! 2623: /* round up current_count_sectors to get dma xfer size */ ! 2624: raw_cmd->length = sector_t+current_count_sectors-aligned_sector_t; ! 2625: raw_cmd->length = ((raw_cmd->length -1)|(ssize-1))+1; ! 2626: raw_cmd->length <<= 9; ! 2627: #ifdef FLOPPY_SANITY_CHECK ! 2628: if ((raw_cmd->length < current_count_sectors << 9) || ! 2629: (raw_cmd->kernel_data != CURRENT->buffer && ! 2630: CT(COMMAND) == FD_WRITE && ! 2631: (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || ! 2632: aligned_sector_t < buffer_min)) || ! 2633: raw_cmd->length % (128 << SIZECODE) || ! 2634: raw_cmd->length <= 0 || current_count_sectors <= 0){ ! 2635: DPRINT("fractionary current count b=%lx s=%lx\n", ! 2636: raw_cmd->length, current_count_sectors); ! 2637: if (raw_cmd->kernel_data != CURRENT->buffer) ! 2638: printk("addr=%d, length=%ld\n", ! 2639: (int) ((raw_cmd->kernel_data - ! 2640: floppy_track_buffer) >> 9), ! 2641: current_count_sectors); ! 2642: printk("st=%d ast=%d mse=%d msi=%d\n", ! 2643: sector_t, aligned_sector_t, max_sector, max_size); ! 2644: printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); ! 2645: printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", ! 2646: COMMAND, SECTOR, HEAD, TRACK); ! 2647: printk("buffer drive=%d\n", buffer_drive); ! 2648: printk("buffer track=%d\n", buffer_track); ! 2649: printk("buffer_min=%d\n", buffer_min); ! 2650: printk("buffer_max=%d\n", buffer_max); ! 2651: return 0; ! 2652: } ! 2653: ! 2654: if (raw_cmd->kernel_data != CURRENT->buffer){ ! 2655: if (raw_cmd->kernel_data < floppy_track_buffer || ! 2656: current_count_sectors < 0 || ! 2657: raw_cmd->length < 0 || ! 2658: raw_cmd->kernel_data + raw_cmd->length > ! 2659: floppy_track_buffer + (max_buffer_sectors << 10)){ ! 2660: DPRINT("buffer overrun in schedule dma\n"); ! 2661: printk("sector_t=%d buffer_min=%d current_count=%ld\n", ! 2662: sector_t, buffer_min, ! 2663: raw_cmd->length >> 9); ! 2664: printk("current_count_sectors=%ld\n", ! 2665: current_count_sectors); ! 2666: if (CT(COMMAND) == FD_READ) ! 2667: printk("read\n"); ! 2668: if (CT(COMMAND) == FD_READ) ! 2669: printk("write\n"); ! 2670: return 0; ! 2671: } ! 2672: } else if (raw_cmd->length > CURRENT->nr_sectors << 9 || ! 2673: current_count_sectors > CURRENT->nr_sectors){ ! 2674: DPRINT("buffer overrun in direct transfer\n"); ! 2675: return 0; ! 2676: } else if (raw_cmd->length < current_count_sectors << 9){ ! 2677: DPRINT("more sectors than bytes\n"); ! 2678: printk("bytes=%ld\n", raw_cmd->length >> 9); ! 2679: printk("sectors=%ld\n", current_count_sectors); ! 2680: } ! 2681: if (raw_cmd->length == 0){ ! 2682: DPRINT("zero dma transfer attempted from make_raw_request\n"); ! 2683: return 0; ! 2684: } ! 2685: #endif ! 2686: return 2; ! 2687: } ! 2688: ! 2689: static void redo_fd_request(void) ! 2690: { ! 2691: #define REPEAT {request_done(0); continue; } ! 2692: kdev_t device; ! 2693: int tmp; ! 2694: ! 2695: lastredo = jiffies; ! 2696: if (current_drive < N_DRIVE) ! 2697: floppy_off(current_drive); ! 2698: ! 2699: if (CURRENT && CURRENT->rq_status == RQ_INACTIVE){ ! 2700: CLEAR_INTR; ! 2701: unlock_fdc(); ! 2702: return; ! 2703: } ! 2704: ! 2705: while(1){ ! 2706: if (!CURRENT) { ! 2707: CLEAR_INTR; ! 2708: unlock_fdc(); ! 2709: return; ! 2710: } ! 2711: if (MAJOR(CURRENT->rq_dev) != MAJOR_NR) ! 2712: panic(DEVICE_NAME ": request list destroyed"); ! 2713: if (CURRENT->bh && !buffer_locked(CURRENT->bh)) ! 2714: panic(DEVICE_NAME ": block not locked"); ! 2715: ! 2716: device = CURRENT->rq_dev; ! 2717: set_fdc(DRIVE(device)); ! 2718: reschedule_timeout(CURRENTD, "redo fd request", 0); ! 2719: ! 2720: set_floppy(device); ! 2721: raw_cmd = & default_raw_cmd; ! 2722: raw_cmd->flags = 0; ! 2723: if (start_motor(redo_fd_request)) return; ! 2724: disk_change(current_drive); ! 2725: if (test_bit(current_drive, &fake_change) || ! 2726: TESTF(FD_DISK_CHANGED)){ ! 2727: DPRINT("disk absent or changed during operation\n"); ! 2728: REPEAT; ! 2729: } ! 2730: if (!_floppy) { /* Autodetection */ ! 2731: if (!probing){ ! 2732: DRS->probed_format = 0; ! 2733: if (next_valid_format()){ ! 2734: DPRINT("no autodetectable formats\n"); ! 2735: _floppy = NULL; ! 2736: REPEAT; ! 2737: } ! 2738: } ! 2739: probing = 1; ! 2740: _floppy = floppy_type+DP->autodetect[DRS->probed_format]; ! 2741: } else ! 2742: probing = 0; ! 2743: errors = & (CURRENT->errors); ! 2744: tmp = make_raw_rw_request(); ! 2745: if (tmp < 2){ ! 2746: request_done(tmp); ! 2747: continue; ! 2748: } ! 2749: ! 2750: if (TESTF(FD_NEED_TWADDLE)) ! 2751: twaddle(); ! 2752: floppy_tq.routine = (void *)(void *) floppy_start; ! 2753: queue_task(&floppy_tq, &tq_immediate); ! 2754: mark_bh(IMMEDIATE_BH); ! 2755: #ifdef DEBUGT ! 2756: debugt("queue fd request"); ! 2757: #endif ! 2758: return; ! 2759: } ! 2760: #undef REPEAT ! 2761: } ! 2762: ! 2763: static struct cont_t rw_cont={ ! 2764: rw_interrupt, ! 2765: redo_fd_request, ! 2766: bad_flp_intr, ! 2767: request_done }; ! 2768: ! 2769: static struct tq_struct request_tq = ! 2770: { 0, 0, (void *) (void *) redo_fd_request, 0 }; ! 2771: ! 2772: static void process_fd_request(void) ! 2773: { ! 2774: cont = &rw_cont; ! 2775: queue_task(&request_tq, &tq_immediate); ! 2776: mark_bh(IMMEDIATE_BH); ! 2777: } ! 2778: ! 2779: static void do_fd_request(void) ! 2780: { ! 2781: sti(); ! 2782: if (fdc_busy){ ! 2783: /* fdc busy, this new request will be treated when the ! 2784: current one is done */ ! 2785: is_alive("do fd request, old request running"); ! 2786: return; ! 2787: } ! 2788: lock_fdc(MAXTIMEOUT,0); ! 2789: process_fd_request(); ! 2790: is_alive("do fd request"); ! 2791: } ! 2792: ! 2793: static struct cont_t poll_cont={ ! 2794: success_and_wakeup, ! 2795: floppy_ready, ! 2796: generic_failure, ! 2797: generic_done }; ! 2798: ! 2799: static int poll_drive(int interruptible, int flag) ! 2800: { ! 2801: int ret; ! 2802: /* no auto-sense, just clear dcl */ ! 2803: raw_cmd = &default_raw_cmd; ! 2804: raw_cmd->flags= flag; ! 2805: raw_cmd->track=0; ! 2806: raw_cmd->cmd_count=0; ! 2807: cont = &poll_cont; ! 2808: #ifdef DCL_DEBUG ! 2809: if (DP->flags & FD_DEBUG){ ! 2810: DPRINT("setting NEWCHANGE in poll_drive\n"); ! 2811: } ! 2812: #endif ! 2813: SETF(FD_DISK_NEWCHANGE); ! 2814: WAIT(floppy_ready); ! 2815: return ret; ! 2816: } ! 2817: ! 2818: /* ! 2819: * User triggered reset ! 2820: * ==================== ! 2821: */ ! 2822: ! 2823: static void reset_intr(void) ! 2824: { ! 2825: printk("weird, reset interrupt called\n"); ! 2826: } ! 2827: ! 2828: static struct cont_t reset_cont={ ! 2829: reset_intr, ! 2830: success_and_wakeup, ! 2831: generic_failure, ! 2832: generic_done }; ! 2833: ! 2834: static int user_reset_fdc(int drive, int arg, int interruptible) ! 2835: { ! 2836: int ret; ! 2837: ! 2838: ret=0; ! 2839: LOCK_FDC(drive,interruptible); ! 2840: if (arg == FD_RESET_ALWAYS) ! 2841: FDCS->reset=1; ! 2842: if (FDCS->reset){ ! 2843: cont = &reset_cont; ! 2844: WAIT(reset_fdc); ! 2845: } ! 2846: process_fd_request(); ! 2847: return ret; ! 2848: } ! 2849: ! 2850: /* ! 2851: * Misc Ioctl's and support ! 2852: * ======================== ! 2853: */ ! 2854: static int fd_copyout(void *param, const void *address, int size) ! 2855: { ! 2856: int ret; ! 2857: ! 2858: ECALL(verify_area(VERIFY_WRITE,param,size)); ! 2859: memcpy_tofs(param,(void *) address, size); ! 2860: return 0; ! 2861: } ! 2862: ! 2863: static int fd_copyin(void *param, void *address, int size) ! 2864: { ! 2865: int ret; ! 2866: ! 2867: ECALL(verify_area(VERIFY_READ,param,size)); ! 2868: memcpy_fromfs((void *) address, param, size); ! 2869: return 0; ! 2870: } ! 2871: ! 2872: #define COPYOUT(x) ECALL(fd_copyout((void *)param, &(x), sizeof(x))) ! 2873: #define COPYIN(x) ECALL(fd_copyin((void *)param, &(x), sizeof(x))) ! 2874: ! 2875: static inline const char *drive_name(int type, int drive) ! 2876: { ! 2877: struct floppy_struct *floppy; ! 2878: ! 2879: if (type) ! 2880: floppy = floppy_type + type; ! 2881: else { ! 2882: if (UDP->native_format) ! 2883: floppy = floppy_type + UDP->native_format; ! 2884: else ! 2885: return "(null)"; ! 2886: } ! 2887: if (floppy->name) ! 2888: return floppy->name; ! 2889: else ! 2890: return "(null)"; ! 2891: } ! 2892: ! 2893: ! 2894: /* raw commands */ ! 2895: static void raw_cmd_done(int flag) ! 2896: { ! 2897: int i; ! 2898: ! 2899: if (!flag) { ! 2900: raw_cmd->flags |= FD_RAW_FAILURE; ! 2901: raw_cmd->flags |= FD_RAW_HARDFAILURE; ! 2902: } else { ! 2903: raw_cmd->reply_count = inr; ! 2904: for (i=0; i< raw_cmd->reply_count; i++) ! 2905: raw_cmd->reply[i] = reply_buffer[i]; ! 2906: ! 2907: if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) ! 2908: raw_cmd->length = fd_get_dma_residue(); ! 2909: ! 2910: if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && ! 2911: (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) ! 2912: raw_cmd->flags |= FD_RAW_FAILURE; ! 2913: ! 2914: if (disk_change(current_drive)) ! 2915: raw_cmd->flags |= FD_RAW_DISK_CHANGE; ! 2916: else ! 2917: raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; ! 2918: if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) ! 2919: motor_off_callback(current_drive); ! 2920: ! 2921: if (raw_cmd->next && ! 2922: (!(raw_cmd->flags & FD_RAW_FAILURE) || ! 2923: !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && ! 2924: ((raw_cmd->flags & FD_RAW_FAILURE) || ! 2925: !(raw_cmd->flags &FD_RAW_STOP_IF_SUCCESS))) { ! 2926: raw_cmd = raw_cmd->next; ! 2927: return; ! 2928: } ! 2929: } ! 2930: generic_done(flag); ! 2931: } ! 2932: ! 2933: ! 2934: static struct cont_t raw_cmd_cont={ ! 2935: success_and_wakeup, ! 2936: floppy_start, ! 2937: generic_failure, ! 2938: raw_cmd_done ! 2939: }; ! 2940: ! 2941: static inline int raw_cmd_copyout(int cmd, char *param, ! 2942: struct floppy_raw_cmd *ptr) ! 2943: { ! 2944: struct old_floppy_raw_cmd old_raw_cmd; ! 2945: int ret; ! 2946: ! 2947: while(ptr) { ! 2948: if (cmd == OLDFDRAWCMD) { ! 2949: old_raw_cmd.flags = ptr->flags; ! 2950: old_raw_cmd.data = ptr->data; ! 2951: old_raw_cmd.length = ptr->length; ! 2952: old_raw_cmd.rate = ptr->rate; ! 2953: old_raw_cmd.reply_count = ptr->reply_count; ! 2954: memcpy(old_raw_cmd.reply, ptr->reply, 7); ! 2955: COPYOUT(old_raw_cmd); ! 2956: param += sizeof(old_raw_cmd); ! 2957: } else { ! 2958: COPYOUT(*ptr); ! 2959: param += sizeof(struct floppy_raw_cmd); ! 2960: } ! 2961: ! 2962: if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length){ ! 2963: if (ptr->length>=0 && ptr->length<=ptr->buffer_length) ! 2964: ECALL(fd_copyout(ptr->data, ! 2965: ptr->kernel_data, ! 2966: ptr->buffer_length - ! 2967: ptr->length)); ! 2968: } ! 2969: ptr = ptr->next; ! 2970: } ! 2971: return 0; ! 2972: } ! 2973: ! 2974: ! 2975: static void raw_cmd_free(struct floppy_raw_cmd **ptr) ! 2976: { ! 2977: struct floppy_raw_cmd *next,*this; ! 2978: ! 2979: this = *ptr; ! 2980: *ptr = 0; ! 2981: while(this) { ! 2982: if (this->buffer_length) { ! 2983: fd_dma_mem_free((unsigned long)this->kernel_data, ! 2984: this->buffer_length); ! 2985: this->buffer_length = 0; ! 2986: } ! 2987: next = this->next; ! 2988: kfree(this); ! 2989: this = next; ! 2990: } ! 2991: } ! 2992: ! 2993: ! 2994: static inline int raw_cmd_copyin(int cmd, char *param, ! 2995: struct floppy_raw_cmd **rcmd) ! 2996: { ! 2997: struct floppy_raw_cmd *ptr; ! 2998: struct old_floppy_raw_cmd old_raw_cmd; ! 2999: int ret; ! 3000: int i; ! 3001: ! 3002: *rcmd = 0; ! 3003: while(1) { ! 3004: ptr = (struct floppy_raw_cmd *) ! 3005: kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); ! 3006: if (!ptr) ! 3007: return -ENOMEM; ! 3008: *rcmd = ptr; ! 3009: if (cmd == OLDFDRAWCMD){ ! 3010: COPYIN(old_raw_cmd); ! 3011: ptr->flags = old_raw_cmd.flags; ! 3012: ptr->data = old_raw_cmd.data; ! 3013: ptr->length = old_raw_cmd.length; ! 3014: ptr->rate = old_raw_cmd.rate; ! 3015: ptr->cmd_count = old_raw_cmd.cmd_count; ! 3016: ptr->track = old_raw_cmd.track; ! 3017: ptr->phys_length = 0; ! 3018: ptr->next = 0; ! 3019: ptr->buffer_length = 0; ! 3020: memcpy(ptr->cmd, old_raw_cmd.cmd, 9); ! 3021: param += sizeof(struct old_floppy_raw_cmd); ! 3022: if (ptr->cmd_count > 9) ! 3023: return -EINVAL; ! 3024: } else { ! 3025: COPYIN(*ptr); ! 3026: ptr->next = 0; ! 3027: ptr->buffer_length = 0; ! 3028: param += sizeof(struct floppy_raw_cmd); ! 3029: if (ptr->cmd_count > 33) ! 3030: /* the command may now also take up the space ! 3031: * initially intended for the reply & the ! 3032: * reply count. Needed for long 82078 commands ! 3033: * such as RESTORE, which takes ... 17 command ! 3034: * bytes. Murphy's law #137: When you reserve ! 3035: * 16 bytes for a structure, you'll one day ! 3036: * discover that you really need 17... ! 3037: */ ! 3038: return -EINVAL; ! 3039: } ! 3040: ! 3041: for (i=0; i< 16; i++) ! 3042: ptr->reply[i] = 0; ! 3043: ptr->resultcode = 0; ! 3044: ptr->kernel_data = 0; ! 3045: ! 3046: if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { ! 3047: if (ptr->length <= 0) ! 3048: return -EINVAL; ! 3049: ptr->kernel_data =(char*)fd_dma_mem_alloc(ptr->length); ! 3050: if (!ptr->kernel_data) ! 3051: return -ENOMEM; ! 3052: ptr->buffer_length = ptr->length; ! 3053: } ! 3054: if ( ptr->flags & FD_RAW_READ ) ! 3055: ECALL( verify_area( VERIFY_WRITE, ptr->data, ! 3056: ptr->length )); ! 3057: if (ptr->flags & FD_RAW_WRITE) ! 3058: ECALL(fd_copyin(ptr->data, ptr->kernel_data, ! 3059: ptr->length)); ! 3060: rcmd = & (ptr->next); ! 3061: if (!(ptr->flags & FD_RAW_MORE)) ! 3062: return 0; ! 3063: ptr->rate &= 0x43; ! 3064: } ! 3065: } ! 3066: ! 3067: ! 3068: static int raw_cmd_ioctl(int cmd, void *param) ! 3069: { ! 3070: int drive, ret, ret2; ! 3071: struct floppy_raw_cmd *my_raw_cmd; ! 3072: ! 3073: if (FDCS->rawcmd <= 1) ! 3074: FDCS->rawcmd = 1; ! 3075: for (drive= 0; drive < N_DRIVE; drive++){ ! 3076: if (FDC(drive) != fdc) ! 3077: continue; ! 3078: if (drive == current_drive){ ! 3079: if (UDRS->fd_ref > 1){ ! 3080: FDCS->rawcmd = 2; ! 3081: break; ! 3082: } ! 3083: } else if (UDRS->fd_ref){ ! 3084: FDCS->rawcmd = 2; ! 3085: break; ! 3086: } ! 3087: } ! 3088: ! 3089: if (FDCS->reset) ! 3090: return -EIO; ! 3091: ! 3092: ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); ! 3093: if (ret) { ! 3094: raw_cmd_free(&my_raw_cmd); ! 3095: return ret; ! 3096: } ! 3097: ! 3098: raw_cmd = my_raw_cmd; ! 3099: cont = &raw_cmd_cont; ! 3100: ret=wait_til_done(floppy_start,1); ! 3101: #ifdef DCL_DEBUG ! 3102: if (DP->flags & FD_DEBUG){ ! 3103: DPRINT("calling disk change from raw_cmd ioctl\n"); ! 3104: } ! 3105: #endif ! 3106: ! 3107: if (ret != -EINTR && FDCS->reset) ! 3108: ret = -EIO; ! 3109: ! 3110: DRS->track = NO_TRACK; ! 3111: ! 3112: ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); ! 3113: if (!ret) ! 3114: ret = ret2; ! 3115: raw_cmd_free(&my_raw_cmd); ! 3116: return ret; ! 3117: } ! 3118: ! 3119: static int invalidate_drive(kdev_t rdev) ! 3120: { ! 3121: /* invalidate the buffer track to force a reread */ ! 3122: set_bit(DRIVE(rdev), &fake_change); ! 3123: process_fd_request(); ! 3124: check_disk_change(rdev); ! 3125: return 0; ! 3126: } ! 3127: ! 3128: ! 3129: static inline void clear_write_error(int drive) ! 3130: { ! 3131: CLEARSTRUCT(UDRWE); ! 3132: } ! 3133: ! 3134: static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, ! 3135: int drive, int type, kdev_t device) ! 3136: { ! 3137: int cnt; ! 3138: ! 3139: /* sanity checking for parameters.*/ ! 3140: if (g->sect <= 0 || ! 3141: g->head <= 0 || ! 3142: g->track <= 0 || ! 3143: g->track > UDP->tracks>>STRETCH(g) || ! 3144: /* check if reserved bits are set */ ! 3145: (g->stretch&~(FD_STRETCH|FD_SWAPSIDES)) != 0) ! 3146: return -EINVAL; ! 3147: if (type){ ! 3148: if (!suser()) ! 3149: return -EPERM; ! 3150: LOCK_FDC(drive,1); ! 3151: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3152: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3153: drive_state[cnt].fd_ref) ! 3154: set_bit(drive, &fake_change); ! 3155: } ! 3156: floppy_type[type] = *g; ! 3157: floppy_type[type].name="user format"; ! 3158: for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) ! 3159: floppy_sizes[cnt]= floppy_sizes[cnt+0x80]= ! 3160: floppy_type[type].size>>1; ! 3161: process_fd_request(); ! 3162: for (cnt = 0; cnt < N_DRIVE; cnt++){ ! 3163: if (ITYPE(drive_state[cnt].fd_device) == type && ! 3164: drive_state[cnt].fd_ref) ! 3165: check_disk_change( ! 3166: MKDEV(FLOPPY_MAJOR, ! 3167: drive_state[cnt].fd_device)); ! 3168: } ! 3169: } else { ! 3170: LOCK_FDC(drive,1); ! 3171: if (cmd != FDDEFPRM) ! 3172: /* notice a disk change immediately, else ! 3173: * we loose our settings immediately*/ ! 3174: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3175: user_params[drive] = *g; ! 3176: if (buffer_drive == drive) ! 3177: SUPBOUND(buffer_max, user_params[drive].sect); ! 3178: current_type[drive] = &user_params[drive]; ! 3179: floppy_sizes[drive] = user_params[drive].size >> 1; ! 3180: if (cmd == FDDEFPRM) ! 3181: DRS->keep_data = -1; ! 3182: else ! 3183: DRS->keep_data = 1; ! 3184: /* invalidation. Invalidate only when needed, i.e. ! 3185: * when there are already sectors in the buffer cache ! 3186: * whose number will change. This is useful, because ! 3187: * mtools often changes the geometry of the disk after ! 3188: * looking at the boot block */ ! 3189: if (DRS->maxblock > user_params[drive].sect || DRS->maxtrack) ! 3190: invalidate_drive(device); ! 3191: else ! 3192: process_fd_request(); ! 3193: } ! 3194: return 0; ! 3195: } ! 3196: ! 3197: /* handle obsolete ioctl's */ ! 3198: static struct translation_entry { ! 3199: int newcmd; ! 3200: int oldcmd; ! 3201: int oldsize; /* size of 0x00xx-style ioctl. Reflects old structures, thus ! 3202: * use numeric values. NO SIZEOFS */ ! 3203: } translation_table[]= { ! 3204: {FDCLRPRM, 0, 0}, ! 3205: {FDSETPRM, 1, 28}, ! 3206: {FDDEFPRM, 2, 28}, ! 3207: {FDGETPRM, 3, 28}, ! 3208: {FDMSGON, 4, 0}, ! 3209: {FDMSGOFF, 5, 0}, ! 3210: {FDFMTBEG, 6, 0}, ! 3211: {FDFMTTRK, 7, 12}, ! 3212: {FDFMTEND, 8, 0}, ! 3213: {FDSETEMSGTRESH, 10, 0}, ! 3214: {FDFLUSH, 11, 0}, ! 3215: {FDSETMAXERRS, 12, 20}, ! 3216: {OLDFDRAWCMD, 30, 0}, ! 3217: {FDGETMAXERRS, 14, 20}, ! 3218: {FDGETDRVTYP, 16, 16}, ! 3219: {FDSETDRVPRM, 20, 88}, ! 3220: {FDGETDRVPRM, 21, 88}, ! 3221: {FDGETDRVSTAT, 22, 52}, ! 3222: {FDPOLLDRVSTAT, 23, 52}, ! 3223: {FDRESET, 24, 0}, ! 3224: {FDGETFDCSTAT, 25, 40}, ! 3225: {FDWERRORCLR, 27, 0}, ! 3226: {FDWERRORGET, 28, 24}, ! 3227: {FDRAWCMD, 0, 0}, ! 3228: {FDEJECT, 0, 0}, ! 3229: {FDTWADDLE, 40, 0} }; ! 3230: ! 3231: static inline int normalize_0x02xx_ioctl(int *cmd, int *size) ! 3232: { ! 3233: int i; ! 3234: ! 3235: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3236: if ((*cmd & 0xffff) == (translation_table[i].newcmd & 0xffff)){ ! 3237: *size = _IOC_SIZE(*cmd); ! 3238: *cmd = translation_table[i].newcmd; ! 3239: if (*size > _IOC_SIZE(*cmd)) { ! 3240: printk("ioctl not yet supported\n"); ! 3241: return -EFAULT; ! 3242: } ! 3243: return 0; ! 3244: } ! 3245: } ! 3246: return -EINVAL; ! 3247: } ! 3248: ! 3249: static inline int xlate_0x00xx_ioctl(int *cmd, int *size) ! 3250: { ! 3251: int i; ! 3252: /* old ioctls' for kernels <= 1.3.33 */ ! 3253: /* When the next even release will come around, we'll start ! 3254: * warning against these. ! 3255: * When the next odd release will come around, we'll fail with ! 3256: * -EINVAL */ ! 3257: if(strcmp(system_utsname.version, "1.4.0") >= 0) ! 3258: printk("obsolete floppy ioctl %x\n", *cmd); ! 3259: if((system_utsname.version[0] == '1' && ! 3260: strcmp(system_utsname.version, "1.5.0") >= 0) || ! 3261: (system_utsname.version[0] >= '2' && ! 3262: strcmp(system_utsname.version, "2.1.0") >= 0)) ! 3263: return -EINVAL; ! 3264: for (i=0; i < ARRAY_SIZE(translation_table); i++) { ! 3265: if (*cmd == translation_table[i].oldcmd) { ! 3266: *size = translation_table[i].oldsize; ! 3267: *cmd = translation_table[i].newcmd; ! 3268: return 0; ! 3269: } ! 3270: } ! 3271: return -EINVAL; ! 3272: } ! 3273: ! 3274: static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, ! 3275: unsigned long param) ! 3276: { ! 3277: #define IOCTL_MODE_BIT 8 ! 3278: #define OPEN_WRITE_BIT 16 ! 3279: #define IOCTL_ALLOWED (filp && (filp->f_mode & IOCTL_MODE_BIT)) ! 3280: #define OUT(c,x) case c: outparam = (const char *) (x); break ! 3281: #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 ! 3282: ! 3283: int i,drive,type; ! 3284: kdev_t device; ! 3285: int ret; ! 3286: int size; ! 3287: union inparam { ! 3288: struct floppy_struct g; /* geometry */ ! 3289: struct format_descr f; ! 3290: struct floppy_max_errors max_errors; ! 3291: struct floppy_drive_params dp; ! 3292: } inparam; /* parameters coming from user space */ ! 3293: const char *outparam; /* parameters passed back to user space */ ! 3294: ! 3295: device = inode->i_rdev; ! 3296: switch (cmd) { ! 3297: RO_IOCTLS(device,param); ! 3298: } ! 3299: type = TYPE(device); ! 3300: drive = DRIVE(device); ! 3301: ! 3302: /* convert compatibility eject ioctls into floppy eject ioctl. ! 3303: * We do this in order to provide a means to eject floppy disks before ! 3304: * installing the new fdutils package */ ! 3305: if(cmd == CDROMEJECT || /* CD-ROM eject */ ! 3306: cmd == 0x6470 /* SunOS floppy eject */) { ! 3307: DPRINT("obsolete eject ioctl\n"); ! 3308: DPRINT("please use floppycontrol --eject\n"); ! 3309: cmd = FDEJECT; ! 3310: } ! 3311: ! 3312: /* convert the old style command into a new style command */ ! 3313: if ((cmd & 0xff00) == 0x0200) { ! 3314: ECALL(normalize_0x02xx_ioctl(&cmd, &size)); ! 3315: } else if ((cmd & 0xff00) == 0x0000) { ! 3316: ECALL(xlate_0x00xx_ioctl(&cmd, &size)); ! 3317: } else ! 3318: return -EINVAL; ! 3319: ! 3320: /* permission checks */ ! 3321: if (((cmd & 0x80) && !suser()) || ! 3322: ((cmd & 0x40) && !IOCTL_ALLOWED)) ! 3323: return -EPERM; ! 3324: ! 3325: /* verify writability of result, and fail early */ ! 3326: if (_IOC_DIR(cmd) & _IOC_READ) ! 3327: ECALL(verify_area(VERIFY_WRITE,(void *) param, size)); ! 3328: ! 3329: /* copyin */ ! 3330: CLEARSTRUCT(&inparam); ! 3331: if (_IOC_DIR(cmd) & _IOC_WRITE) ! 3332: ECALL(fd_copyin((void *)param, &inparam, size)) ! 3333: ! 3334: switch (cmd) { ! 3335: case FDEJECT: ! 3336: if(UDRS->fd_ref != 1) ! 3337: /* somebody else has this drive open */ ! 3338: return -EBUSY; ! 3339: LOCK_FDC(drive,1); ! 3340: ! 3341: /* do the actual eject. Fails on ! 3342: * non-Sparc architectures */ ! 3343: ret=fd_eject(UNIT(drive)); ! 3344: ! 3345: USETF(FD_DISK_CHANGED); ! 3346: USETF(FD_VERIFY); ! 3347: process_fd_request(); ! 3348: return ret; ! 3349: case FDCLRPRM: ! 3350: LOCK_FDC(drive,1); ! 3351: current_type[drive] = NULL; ! 3352: floppy_sizes[drive] = MAX_DISK_SIZE; ! 3353: UDRS->keep_data = 0; ! 3354: return invalidate_drive(device); ! 3355: case FDSETPRM: ! 3356: case FDDEFPRM: ! 3357: return set_geometry(cmd, & inparam.g, ! 3358: drive, type, device); ! 3359: case FDGETPRM: ! 3360: LOCK_FDC(drive,1); ! 3361: CALL(poll_drive(1,0)); ! 3362: process_fd_request(); ! 3363: if (type) ! 3364: outparam = (char *) &floppy_type[type]; ! 3365: else ! 3366: outparam = (char *) current_type[drive]; ! 3367: if(!outparam) ! 3368: return -ENODEV; ! 3369: break; ! 3370: ! 3371: case FDMSGON: ! 3372: UDP->flags |= FTD_MSG; ! 3373: return 0; ! 3374: case FDMSGOFF: ! 3375: UDP->flags &= ~FTD_MSG; ! 3376: return 0; ! 3377: ! 3378: case FDFMTBEG: ! 3379: LOCK_FDC(drive,1); ! 3380: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3381: ret = UDRS->flags; ! 3382: process_fd_request(); ! 3383: if(ret & FD_VERIFY) ! 3384: return -ENODEV; ! 3385: if(!(ret & FD_DISK_WRITABLE)) ! 3386: return -EROFS; ! 3387: return 0; ! 3388: case FDFMTTRK: ! 3389: if (UDRS->fd_ref != 1) ! 3390: return -EBUSY; ! 3391: return do_format(device, &inparam.f); ! 3392: case FDFMTEND: ! 3393: case FDFLUSH: ! 3394: LOCK_FDC(drive,1); ! 3395: return invalidate_drive(device); ! 3396: ! 3397: case FDSETEMSGTRESH: ! 3398: UDP->max_errors.reporting = ! 3399: (unsigned short) (param & 0x0f); ! 3400: return 0; ! 3401: OUT(FDGETMAXERRS, &UDP->max_errors); ! 3402: IN(FDSETMAXERRS, &UDP->max_errors, max_errors); ! 3403: ! 3404: case FDGETDRVTYP: ! 3405: outparam = drive_name(type,drive); ! 3406: SUPBOUND(size,strlen(outparam)+1); ! 3407: break; ! 3408: ! 3409: IN(FDSETDRVPRM, UDP, dp); ! 3410: OUT(FDGETDRVPRM, UDP); ! 3411: ! 3412: case FDPOLLDRVSTAT: ! 3413: LOCK_FDC(drive,1); ! 3414: CALL(poll_drive(1, FD_RAW_NEED_DISK)); ! 3415: process_fd_request(); ! 3416: /* fall through */ ! 3417: OUT(FDGETDRVSTAT, UDRS); ! 3418: ! 3419: case FDRESET: ! 3420: return user_reset_fdc(drive, (int)param, 1); ! 3421: ! 3422: OUT(FDGETFDCSTAT,UFDCS); ! 3423: ! 3424: case FDWERRORCLR: ! 3425: CLEARSTRUCT(UDRWE); ! 3426: return 0; ! 3427: OUT(FDWERRORGET,UDRWE); ! 3428: ! 3429: case OLDFDRAWCMD: ! 3430: case FDRAWCMD: ! 3431: if (type) ! 3432: return -EINVAL; ! 3433: LOCK_FDC(drive,1); ! 3434: set_floppy(device); ! 3435: CALL(i = raw_cmd_ioctl(cmd,(void *) param)); ! 3436: process_fd_request(); ! 3437: return i; ! 3438: ! 3439: case FDTWADDLE: ! 3440: LOCK_FDC(drive,1); ! 3441: twaddle(); ! 3442: process_fd_request(); ! 3443: return 0; ! 3444: ! 3445: default: ! 3446: return -EINVAL; ! 3447: } ! 3448: ! 3449: if (_IOC_DIR(cmd) & _IOC_READ) ! 3450: return fd_copyout((void *)param, outparam, size); ! 3451: else ! 3452: return 0; ! 3453: #undef IOCTL_ALLOWED ! 3454: #undef OUT ! 3455: #undef IN ! 3456: } ! 3457: ! 3458: static void config_types(void) ! 3459: { ! 3460: int first=1; ! 3461: int drive; ! 3462: ! 3463: /* read drive info out of physical CMOS */ ! 3464: drive=0; ! 3465: if (!UDP->cmos) ! 3466: UDP->cmos= FLOPPY0_TYPE; ! 3467: drive=1; ! 3468: if (!UDP->cmos && FLOPPY1_TYPE) ! 3469: UDP->cmos = FLOPPY1_TYPE; ! 3470: ! 3471: /* XXX */ ! 3472: /* additional physical CMOS drive detection should go here */ ! 3473: ! 3474: for (drive=0; drive < N_DRIVE; drive++){ ! 3475: if (UDP->cmos >= 16) ! 3476: UDP->cmos = 0; ! 3477: if (UDP->cmos >= 0 && UDP->cmos <= NUMBER(default_drive_params)) ! 3478: memcpy((char *) UDP, ! 3479: (char *) (&default_drive_params[(int)UDP->cmos].params), ! 3480: sizeof(struct floppy_drive_params)); ! 3481: if (UDP->cmos){ ! 3482: if (first) ! 3483: printk(KERN_INFO "Floppy drive(s): "); ! 3484: else ! 3485: printk(", "); ! 3486: first=0; ! 3487: if (UDP->cmos > 0){ ! 3488: allowed_drive_mask |= 1 << drive; ! 3489: printk("fd%d is %s", drive, ! 3490: default_drive_params[(int)UDP->cmos].name); ! 3491: } else ! 3492: printk("fd%d is unknown type %d",drive, ! 3493: UDP->cmos); ! 3494: } ! 3495: } ! 3496: if (!first) ! 3497: printk("\n"); ! 3498: } ! 3499: ! 3500: static int floppy_read(struct inode * inode, struct file * filp, ! 3501: char * buf, int count) ! 3502: { ! 3503: int drive = DRIVE(inode->i_rdev); ! 3504: ! 3505: check_disk_change(inode->i_rdev); ! 3506: if (UTESTF(FD_DISK_CHANGED)) ! 3507: return -ENXIO; ! 3508: return block_read(inode, filp, buf, count); ! 3509: } ! 3510: ! 3511: static int floppy_write(struct inode * inode, struct file * filp, ! 3512: const char * buf, int count) ! 3513: { ! 3514: int block; ! 3515: int ret; ! 3516: int drive = DRIVE(inode->i_rdev); ! 3517: ! 3518: if (!UDRS->maxblock) ! 3519: UDRS->maxblock=1;/* make change detectable */ ! 3520: check_disk_change(inode->i_rdev); ! 3521: if (UTESTF(FD_DISK_CHANGED)) ! 3522: return -ENXIO; ! 3523: if (!UTESTF(FD_DISK_WRITABLE)) ! 3524: return -EROFS; ! 3525: block = (filp->f_pos + count) >> 9; ! 3526: INFBOUND(UDRS->maxblock, block); ! 3527: ret= block_write(inode, filp, buf, count); ! 3528: return ret; ! 3529: } ! 3530: ! 3531: static void floppy_release(struct inode * inode, struct file * filp) ! 3532: { ! 3533: int drive; ! 3534: ! 3535: drive = DRIVE(inode->i_rdev); ! 3536: ! 3537: if (!filp || (filp->f_mode & (2 | OPEN_WRITE_BIT))) ! 3538: /* if the file is mounted OR (writable now AND writable at ! 3539: * open time) Linus: Does this cover all cases? */ ! 3540: block_fsync(inode,filp); ! 3541: ! 3542: if (UDRS->fd_ref < 0) ! 3543: UDRS->fd_ref=0; ! 3544: else if (!UDRS->fd_ref--) { ! 3545: DPRINT("floppy_release with fd_ref == 0"); ! 3546: UDRS->fd_ref = 0; ! 3547: } ! 3548: floppy_release_irq_and_dma(); ! 3549: } ! 3550: ! 3551: /* ! 3552: * floppy_open check for aliasing (/dev/fd0 can be the same as ! 3553: * /dev/PS0 etc), and disallows simultaneous access to the same ! 3554: * drive with different device numbers. ! 3555: */ ! 3556: #define RETERR(x) do{floppy_release(inode,filp); return -(x);}while(0) ! 3557: ! 3558: static int floppy_open(struct inode * inode, struct file * filp) ! 3559: { ! 3560: int drive; ! 3561: int old_dev; ! 3562: int try; ! 3563: char *tmp; ! 3564: ! 3565: if (!filp) { ! 3566: DPRINT("Weird, open called with filp=0\n"); ! 3567: return -EIO; ! 3568: } ! 3569: ! 3570: drive = DRIVE(inode->i_rdev); ! 3571: if (drive >= N_DRIVE || ! 3572: !(allowed_drive_mask & (1 << drive)) || ! 3573: fdc_state[FDC(drive)].version == FDC_NONE) ! 3574: return -ENXIO; ! 3575: ! 3576: if (TYPE(inode->i_rdev) >= NUMBER(floppy_type)) ! 3577: return -ENXIO; ! 3578: old_dev = UDRS->fd_device; ! 3579: if (UDRS->fd_ref && old_dev != MINOR(inode->i_rdev)) ! 3580: return -EBUSY; ! 3581: ! 3582: if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)){ ! 3583: USETF(FD_DISK_CHANGED); ! 3584: USETF(FD_VERIFY); ! 3585: } ! 3586: ! 3587: if (UDRS->fd_ref == -1 || ! 3588: (UDRS->fd_ref && (filp->f_flags & O_EXCL))) ! 3589: return -EBUSY; ! 3590: ! 3591: if (floppy_grab_irq_and_dma()) ! 3592: return -EBUSY; ! 3593: ! 3594: if (filp->f_flags & O_EXCL) ! 3595: UDRS->fd_ref = -1; ! 3596: else ! 3597: UDRS->fd_ref++; ! 3598: ! 3599: if (!floppy_track_buffer){ ! 3600: /* if opening an ED drive, reserve a big buffer, ! 3601: * else reserve a small one */ ! 3602: if ((UDP->cmos == 6) || (UDP->cmos == 5)) ! 3603: try = 64; /* Only 48 actually useful */ ! 3604: else ! 3605: try = 32; /* Only 24 actually useful */ ! 3606: ! 3607: tmp=(char *)fd_dma_mem_alloc(1024 * try); ! 3608: if (!tmp) { ! 3609: try >>= 1; /* buffer only one side */ ! 3610: INFBOUND(try, 16); ! 3611: tmp= (char *)fd_dma_mem_alloc(1024*try); ! 3612: } ! 3613: if (!tmp) { ! 3614: DPRINT("Unable to allocate DMA memory\n"); ! 3615: RETERR(ENXIO); ! 3616: } ! 3617: if (floppy_track_buffer) ! 3618: fd_dma_mem_free((unsigned long)tmp,try*1024); ! 3619: else { ! 3620: buffer_min = buffer_max = -1; ! 3621: floppy_track_buffer = tmp; ! 3622: max_buffer_sectors = try; ! 3623: } ! 3624: } ! 3625: ! 3626: UDRS->fd_device = MINOR(inode->i_rdev); ! 3627: if (old_dev != -1 && old_dev != MINOR(inode->i_rdev)) { ! 3628: if (buffer_drive == drive) ! 3629: buffer_track = -1; ! 3630: invalidate_buffers(MKDEV(FLOPPY_MAJOR,old_dev)); ! 3631: } ! 3632: ! 3633: /* Allow ioctls if we have write-permissions even if read-only open */ ! 3634: if ((filp->f_mode & 2) || (permission(inode,2) == 0)) ! 3635: filp->f_mode |= IOCTL_MODE_BIT; ! 3636: if (filp->f_mode & 2) ! 3637: filp->f_mode |= OPEN_WRITE_BIT; ! 3638: ! 3639: if (UFDCS->rawcmd == 1) ! 3640: UFDCS->rawcmd = 2; ! 3641: ! 3642: if (filp->f_flags & O_NDELAY) ! 3643: return 0; ! 3644: if (filp->f_mode & 3) { ! 3645: UDRS->last_checked = 0; ! 3646: check_disk_change(inode->i_rdev); ! 3647: if (UTESTF(FD_DISK_CHANGED)) ! 3648: RETERR(ENXIO); ! 3649: } ! 3650: if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) ! 3651: RETERR(EROFS); ! 3652: return 0; ! 3653: #undef RETERR ! 3654: } ! 3655: ! 3656: /* ! 3657: * Check if the disk has been changed or if a change has been faked. ! 3658: */ ! 3659: static int check_floppy_change(kdev_t dev) ! 3660: { ! 3661: int drive = DRIVE(dev); ! 3662: ! 3663: if (MAJOR(dev) != MAJOR_NR) { ! 3664: DPRINT("check_floppy_change: not a floppy\n"); ! 3665: return 0; ! 3666: } ! 3667: ! 3668: if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) ! 3669: return 1; ! 3670: ! 3671: if (UDP->checkfreq < jiffies - UDRS->last_checked){ ! 3672: lock_fdc(drive,0); ! 3673: poll_drive(0,0); ! 3674: process_fd_request(); ! 3675: } ! 3676: ! 3677: if (UTESTF(FD_DISK_CHANGED) || ! 3678: UTESTF(FD_VERIFY) || ! 3679: test_bit(drive, &fake_change) || ! 3680: (!TYPE(dev) && !current_type[drive])) ! 3681: return 1; ! 3682: return 0; ! 3683: } ! 3684: ! 3685: /* revalidate the floppy disk, i.e. trigger format autodetection by reading ! 3686: * the bootblock (block 0). "Autodetection" is also needed to check whether ! 3687: * there is a disk in the drive at all... Thus we also do it for fixed ! 3688: * geometry formats */ ! 3689: static int floppy_revalidate(kdev_t dev) ! 3690: { ! 3691: #define NO_GEOM (!current_type[drive] && !TYPE(dev)) ! 3692: struct buffer_head * bh; ! 3693: int drive=DRIVE(dev); ! 3694: int cf; ! 3695: ! 3696: if (UTESTF(FD_DISK_CHANGED) || ! 3697: UTESTF(FD_VERIFY) || ! 3698: test_bit(drive, &fake_change) || ! 3699: NO_GEOM){ ! 3700: lock_fdc(drive,0); ! 3701: cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); ! 3702: if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)){ ! 3703: process_fd_request(); /*already done by another thread*/ ! 3704: return 0; ! 3705: } ! 3706: UDRS->maxblock = 0; ! 3707: UDRS->maxtrack = 0; ! 3708: if (buffer_drive == drive) ! 3709: buffer_track = -1; ! 3710: clear_bit(drive, &fake_change); ! 3711: UCLEARF(FD_DISK_CHANGED); ! 3712: if (cf) ! 3713: UDRS->generation++; ! 3714: if (NO_GEOM){ ! 3715: /* auto-sensing */ ! 3716: int size = floppy_blocksizes[MINOR(dev)]; ! 3717: if (!size) ! 3718: size = 1024; ! 3719: if (!(bh = getblk(dev,0,size))){ ! 3720: process_fd_request(); ! 3721: return 1; ! 3722: } ! 3723: if (bh && !buffer_uptodate(bh)) ! 3724: ll_rw_block(READ, 1, &bh); ! 3725: process_fd_request(); ! 3726: wait_on_buffer(bh); ! 3727: brelse(bh); ! 3728: return 0; ! 3729: } ! 3730: if (cf) ! 3731: poll_drive(0, FD_RAW_NEED_DISK); ! 3732: process_fd_request(); ! 3733: } ! 3734: return 0; ! 3735: } ! 3736: ! 3737: static struct file_operations floppy_fops = { ! 3738: NULL, /* lseek - default */ ! 3739: floppy_read, /* read - general block-dev read */ ! 3740: floppy_write, /* write - general block-dev write */ ! 3741: NULL, /* readdir - bad */ ! 3742: NULL, /* select */ ! 3743: fd_ioctl, /* ioctl */ ! 3744: NULL, /* mmap */ ! 3745: floppy_open, /* open */ ! 3746: floppy_release, /* release */ ! 3747: block_fsync, /* fsync */ ! 3748: NULL, /* fasync */ ! 3749: check_floppy_change, /* media_change */ ! 3750: floppy_revalidate, /* revalidate */ ! 3751: }; ! 3752: ! 3753: /* ! 3754: * Floppy Driver initialization ! 3755: * ============================= ! 3756: */ ! 3757: ! 3758: /* Determine the floppy disk controller type */ ! 3759: /* This routine was written by David C. Niemi */ ! 3760: static char get_fdc_version(void) ! 3761: { ! 3762: int r; ! 3763: ! 3764: output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ ! 3765: if (FDCS->reset) ! 3766: return FDC_NONE; ! 3767: if ((r = result()) <= 0x00) ! 3768: return FDC_NONE; /* No FDC present ??? */ ! 3769: if ((r==1) && (reply_buffer[0] == 0x80)){ ! 3770: printk(KERN_INFO "FDC %d is an 8272A\n",fdc); ! 3771: return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ ! 3772: } ! 3773: if (r != 10) { ! 3774: printk("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", ! 3775: fdc, r); ! 3776: return FDC_UNKNOWN; ! 3777: } ! 3778: ! 3779: if(!fdc_configure()) { ! 3780: printk(KERN_INFO "FDC %d is an 82072\n",fdc); ! 3781: return FDC_82072; /* 82072 doesn't know CONFIGURE */ ! 3782: } ! 3783: ! 3784: output_byte(FD_PERPENDICULAR); ! 3785: if(need_more_output() == MORE_OUTPUT) { ! 3786: output_byte(0); ! 3787: } else { ! 3788: printk(KERN_INFO "FDC %d is an 82072A\n", fdc); ! 3789: return FDC_82072A; /* 82072A as found on Sparcs. */ ! 3790: } ! 3791: ! 3792: output_byte(FD_UNLOCK); ! 3793: r = result(); ! 3794: if ((r == 1) && (reply_buffer[0] == 0x80)){ ! 3795: printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); ! 3796: return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know ! 3797: * LOCK/UNLOCK */ ! 3798: } ! 3799: if ((r != 1) || (reply_buffer[0] != 0x00)) { ! 3800: printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", ! 3801: fdc, r); ! 3802: return FDC_UNKNOWN; ! 3803: } ! 3804: output_byte(FD_PARTID); ! 3805: r = result(); ! 3806: if (r != 1) { ! 3807: printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", ! 3808: fdc, r); ! 3809: return FDC_UNKNOWN; ! 3810: } ! 3811: if (reply_buffer[0] == 0x80) { ! 3812: printk(KERN_INFO "FDC %d is a post-1991 82077\n",fdc); ! 3813: return FDC_82077; /* Revised 82077AA passes all the tests */ ! 3814: } ! 3815: switch (reply_buffer[0] >> 5) { ! 3816: case 0x0: ! 3817: /* Either a 82078-1 or a 82078SL running at 5Volt */ ! 3818: printk(KERN_INFO "FDC %d is an 82078.\n",fdc); ! 3819: return FDC_82078; ! 3820: case 0x1: ! 3821: printk(KERN_INFO "FDC %d is a 44pin 82078\n",fdc); ! 3822: return FDC_82078; ! 3823: case 0x2: ! 3824: printk(KERN_INFO "FDC %d is a S82078B\n", fdc); ! 3825: return FDC_S82078B; ! 3826: case 0x3: ! 3827: printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", fdc); ! 3828: return FDC_87306; ! 3829: default: ! 3830: printk(KERN_INFO "FDC %d init: 82078 variant with unknown PARTID=%d.\n", ! 3831: fdc, reply_buffer[0] >> 5); ! 3832: return FDC_82078_UNKN; ! 3833: } ! 3834: } /* get_fdc_version */ ! 3835: ! 3836: /* lilo configuration */ ! 3837: ! 3838: /* we make the invert_dcl function global. One day, somebody might ! 3839: * want to centralize all thinkpad related options into one lilo option, ! 3840: * there are just so many thinkpad related quirks! */ ! 3841: void floppy_invert_dcl(int *ints,int param) ! 3842: { ! 3843: int i; ! 3844: ! 3845: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3846: if (param) ! 3847: default_drive_params[i].params.flags |= 0x80; ! 3848: else ! 3849: default_drive_params[i].params.flags &= ~0x80; ! 3850: } ! 3851: DPRINT("Configuring drives for inverted dcl\n"); ! 3852: } ! 3853: ! 3854: static void daring(int *ints,int param) ! 3855: { ! 3856: int i; ! 3857: ! 3858: for (i=0; i < ARRAY_SIZE(default_drive_params); i++){ ! 3859: if (param){ ! 3860: default_drive_params[i].params.select_delay = 0; ! 3861: default_drive_params[i].params.flags |= FD_SILENT_DCL_CLEAR; ! 3862: } else { ! 3863: default_drive_params[i].params.select_delay = 2*HZ/100; ! 3864: default_drive_params[i].params.flags &= ~FD_SILENT_DCL_CLEAR; ! 3865: } ! 3866: } ! 3867: DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); ! 3868: } ! 3869: ! 3870: static void set_cmos(int *ints, int dummy) ! 3871: { ! 3872: int current_drive=0; ! 3873: ! 3874: if (ints[0] != 2){ ! 3875: DPRINT("wrong number of parameter for cmos\n"); ! 3876: return; ! 3877: } ! 3878: current_drive = ints[1]; ! 3879: if (current_drive < 0 || current_drive >= 8){ ! 3880: DPRINT("bad drive for set_cmos\n"); ! 3881: return; ! 3882: } ! 3883: if (current_drive >= 4 && !FDC2) ! 3884: FDC2 = 0x370; ! 3885: if (ints[2] <= 0 || ! 3886: (ints[2] >= NUMBER(default_drive_params) && ints[2] != 16)){ ! 3887: DPRINT("bad cmos code %d\n", ints[2]); ! 3888: return; ! 3889: } ! 3890: DP->cmos = ints[2]; ! 3891: DPRINT("setting cmos code to %d\n", ints[2]); ! 3892: } ! 3893: ! 3894: static struct param_table { ! 3895: const char *name; ! 3896: void (*fn)(int *ints, int param); ! 3897: int *var; ! 3898: int def_param; ! 3899: } config_params[]={ ! 3900: { "allowed_drive_mask", 0, &allowed_drive_mask, 0xff }, ! 3901: { "all_drives", 0, &allowed_drive_mask, 0xff }, ! 3902: { "asus_pci", 0, &allowed_drive_mask, 0x33 }, ! 3903: ! 3904: { "daring", daring, 0, 1}, ! 3905: ! 3906: { "two_fdc", 0, &FDC2, 0x370 }, ! 3907: { "one_fdc", 0, &FDC2, 0 }, ! 3908: ! 3909: { "thinkpad", floppy_invert_dcl, 0, 1 }, ! 3910: ! 3911: { "nodma", 0, &use_virtual_dma, 1 }, ! 3912: { "omnibook", 0, &use_virtual_dma, 1 }, ! 3913: { "dma", 0, &use_virtual_dma, 0 }, ! 3914: ! 3915: { "fifo_depth", 0, &fifo_depth, 0xa }, ! 3916: { "nofifo", 0, &no_fifo, 0x20 }, ! 3917: { "usefifo", 0, &no_fifo, 0 }, ! 3918: ! 3919: { "cmos", set_cmos, 0, 0 }, ! 3920: ! 3921: { "unexpected_interrupts", 0, &print_unex, 1 }, ! 3922: { "no_unexpected_interrupts", 0, &print_unex, 0 }, ! 3923: { "L40SX", 0, &print_unex, 0 } }; ! 3924: ! 3925: #define FLOPPY_SETUP ! 3926: void floppy_setup(char *str, int *ints) ! 3927: { ! 3928: int i; ! 3929: int param; ! 3930: if (str) ! 3931: for (i=0; i< ARRAY_SIZE(config_params); i++){ ! 3932: if (strcmp(str,config_params[i].name) == 0){ ! 3933: if (ints[0]) ! 3934: param = ints[1]; ! 3935: else ! 3936: param = config_params[i].def_param; ! 3937: if(config_params[i].fn) ! 3938: config_params[i].fn(ints,param); ! 3939: if(config_params[i].var) { ! 3940: DPRINT("%s=%d\n", str, param); ! 3941: *config_params[i].var = param; ! 3942: } ! 3943: return; ! 3944: } ! 3945: } ! 3946: if (str) { ! 3947: DPRINT("unknown floppy option [%s]\n", str); ! 3948: ! 3949: DPRINT("allowed options are:"); ! 3950: for (i=0; i< ARRAY_SIZE(config_params); i++) ! 3951: printk(" %s",config_params[i].name); ! 3952: printk("\n"); ! 3953: } else ! 3954: DPRINT("botched floppy option\n"); ! 3955: DPRINT("Read linux/drivers/block/README.fd\n"); ! 3956: } ! 3957: ! 3958: int floppy_init(void) ! 3959: { ! 3960: int i,unit,drive; ! 3961: int have_no_fdc= -EIO; ! 3962: ! 3963: raw_cmd = 0; ! 3964: ! 3965: if (register_blkdev(MAJOR_NR,"fd",&floppy_fops)) { ! 3966: printk("Unable to get major %d for floppy\n",MAJOR_NR); ! 3967: return -EBUSY; ! 3968: } ! 3969: ! 3970: for (i=0; i<256; i++) ! 3971: if (ITYPE(i)) ! 3972: floppy_sizes[i] = floppy_type[ITYPE(i)].size >> 1; ! 3973: else ! 3974: floppy_sizes[i] = MAX_DISK_SIZE; ! 3975: ! 3976: blk_size[MAJOR_NR] = floppy_sizes; ! 3977: blksize_size[MAJOR_NR] = floppy_blocksizes; ! 3978: blk_dev[MAJOR_NR].request_fn = DEVICE_REQUEST; ! 3979: reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); ! 3980: config_types(); ! 3981: ! 3982: for (i = 0; i < N_FDC; i++) { ! 3983: fdc = i; ! 3984: CLEARSTRUCT(FDCS); ! 3985: FDCS->dtr = -1; ! 3986: FDCS->dor = 0x4; ! 3987: #ifdef __sparc__ ! 3988: /*sparcs don't have a DOR reset which we can fall back on to*/ ! 3989: FDCS->version = FDC_82072A; ! 3990: #endif ! 3991: } ! 3992: ! 3993: fdc_state[0].address = FDC1; ! 3994: #if N_FDC > 1 ! 3995: fdc_state[1].address = FDC2; ! 3996: #endif ! 3997: ! 3998: if (floppy_grab_irq_and_dma()){ ! 3999: del_timer(&fd_timeout); ! 4000: blk_dev[MAJOR_NR].request_fn = NULL; ! 4001: unregister_blkdev(MAJOR_NR,"fd"); ! 4002: return -EBUSY; ! 4003: } ! 4004: ! 4005: /* initialise drive state */ ! 4006: for (drive = 0; drive < N_DRIVE; drive++) { ! 4007: CLEARSTRUCT(UDRS); ! 4008: CLEARSTRUCT(UDRWE); ! 4009: UDRS->flags = FD_VERIFY | FD_DISK_NEWCHANGE | FD_DISK_CHANGED; ! 4010: UDRS->fd_device = -1; ! 4011: floppy_track_buffer = NULL; ! 4012: max_buffer_sectors = 0; ! 4013: } ! 4014: ! 4015: for (i = 0; i < N_FDC; i++) { ! 4016: fdc = i; ! 4017: FDCS->driver_version = FD_DRIVER_VERSION; ! 4018: for (unit=0; unit<4; unit++) ! 4019: FDCS->track[unit] = 0; ! 4020: if (FDCS->address == -1) ! 4021: continue; ! 4022: FDCS->rawcmd = 2; ! 4023: if (user_reset_fdc(-1,FD_RESET_ALWAYS,0)){ ! 4024: FDCS->address = -1; ! 4025: FDCS->version = FDC_NONE; ! 4026: continue; ! 4027: } ! 4028: /* Try to determine the floppy controller type */ ! 4029: FDCS->version = get_fdc_version(); ! 4030: if (FDCS->version == FDC_NONE){ ! 4031: FDCS->address = -1; ! 4032: continue; ! 4033: } ! 4034: ! 4035: request_region(FDCS->address, 6, "floppy"); ! 4036: request_region(FDCS->address+7, 1, "floppy DIR"); ! 4037: /* address + 6 is reserved, and may be taken by IDE. ! 4038: * Unfortunately, Adaptec doesn't know this :-(, */ ! 4039: ! 4040: have_no_fdc = 0; ! 4041: /* Not all FDCs seem to be able to handle the version command ! 4042: * properly, so force a reset for the standard FDC clones, ! 4043: * to avoid interrupt garbage. ! 4044: */ ! 4045: user_reset_fdc(-1,FD_RESET_ALWAYS,0); ! 4046: } ! 4047: fdc=0; ! 4048: del_timer(&fd_timeout); ! 4049: current_drive = 0; ! 4050: floppy_release_irq_and_dma(); ! 4051: initialising=0; ! 4052: if (have_no_fdc) { ! 4053: DPRINT("no floppy controllers found\n"); ! 4054: request_tq.routine = (void *)(void *) empty; ! 4055: /* ! 4056: * When we return we may be unloaded. This little ! 4057: * trick forces the immediate_bh handler to have run ! 4058: * before we unload it, lest we cause bad things. ! 4059: */ ! 4060: mark_bh(IMMEDIATE_BH); ! 4061: schedule(); ! 4062: if (usage_count) ! 4063: floppy_release_irq_and_dma(); ! 4064: blk_dev[MAJOR_NR].request_fn = NULL; ! 4065: unregister_blkdev(MAJOR_NR,"fd"); ! 4066: } ! 4067: return have_no_fdc; ! 4068: } ! 4069: ! 4070: static int floppy_grab_irq_and_dma(void) ! 4071: { ! 4072: int i; ! 4073: unsigned long flags; ! 4074: ! 4075: INT_OFF; ! 4076: if (usage_count++){ ! 4077: INT_ON; ! 4078: return 0; ! 4079: } ! 4080: INT_ON; ! 4081: MOD_INC_USE_COUNT; ! 4082: for (i=0; i< N_FDC; i++){ ! 4083: if (fdc_state[i].address != -1){ ! 4084: fdc = i; ! 4085: reset_fdc_info(1); ! 4086: fd_outb(FDCS->dor, FD_DOR); ! 4087: } ! 4088: } ! 4089: fdc = 0; ! 4090: set_dor(0, ~0, 8); /* avoid immediate interrupt */ ! 4091: ! 4092: if (fd_request_irq()) { ! 4093: DPRINT("Unable to grab IRQ%d for the floppy driver\n", ! 4094: FLOPPY_IRQ); ! 4095: MOD_DEC_USE_COUNT; ! 4096: usage_count--; ! 4097: return -1; ! 4098: } ! 4099: if (fd_request_dma()) { ! 4100: DPRINT("Unable to grab DMA%d for the floppy driver\n", ! 4101: FLOPPY_DMA); ! 4102: fd_free_irq(); ! 4103: MOD_DEC_USE_COUNT; ! 4104: usage_count--; ! 4105: return -1; ! 4106: } ! 4107: for (fdc = 0; fdc < N_FDC; fdc++) ! 4108: if (FDCS->address != -1) ! 4109: fd_outb(FDCS->dor, FD_DOR); ! 4110: fdc = 0; ! 4111: fd_enable_irq(); ! 4112: irqdma_allocated=1; ! 4113: return 0; ! 4114: } ! 4115: ! 4116: static void floppy_release_irq_and_dma(void) ! 4117: { ! 4118: #ifdef FLOPPY_SANITY_CHECK ! 4119: int drive; ! 4120: #endif ! 4121: long tmpsize; ! 4122: unsigned long tmpaddr; ! 4123: unsigned long flags; ! 4124: ! 4125: INT_OFF; ! 4126: if (--usage_count){ ! 4127: INT_ON; ! 4128: return; ! 4129: } ! 4130: INT_ON; ! 4131: if(irqdma_allocated) ! 4132: { ! 4133: fd_disable_dma(); ! 4134: fd_free_dma(); ! 4135: fd_disable_irq(); ! 4136: fd_free_irq(); ! 4137: irqdma_allocated=0; ! 4138: } ! 4139: ! 4140: set_dor(0, ~0, 8); ! 4141: #if N_FDC > 1 ! 4142: set_dor(1, ~8, 0); ! 4143: #endif ! 4144: floppy_enable_hlt(); ! 4145: ! 4146: if (floppy_track_buffer && max_buffer_sectors) { ! 4147: tmpsize = max_buffer_sectors*1024; ! 4148: tmpaddr = (unsigned long)floppy_track_buffer; ! 4149: floppy_track_buffer = 0; ! 4150: max_buffer_sectors = 0; ! 4151: buffer_min = buffer_max = -1; ! 4152: fd_dma_mem_free(tmpaddr, tmpsize); ! 4153: } ! 4154: ! 4155: #ifdef FLOPPY_SANITY_CHECK ! 4156: #ifndef __sparc__ ! 4157: for (drive=0; drive < N_FDC * 4; drive++) ! 4158: if (motor_off_timer[drive].next) ! 4159: printk("motor off timer %d still active\n", drive); ! 4160: #endif ! 4161: ! 4162: if (fd_timeout.next) ! 4163: printk("floppy timer still active:%s\n", timeout_message); ! 4164: if (fd_timer.next) ! 4165: printk("auxiliary floppy timer still active\n"); ! 4166: if (floppy_tq.sync) ! 4167: printk("task queue still active\n"); ! 4168: #endif ! 4169: MOD_DEC_USE_COUNT; ! 4170: } ! 4171: ! 4172: ! 4173: #ifdef MODULE ! 4174: ! 4175: extern char *get_options(char *str, int *ints); ! 4176: ! 4177: char *floppy=NULL; ! 4178: ! 4179: static void parse_floppy_cfg_string(char *cfg) ! 4180: { ! 4181: char *ptr; ! 4182: int ints[11]; ! 4183: ! 4184: while(*cfg) { ! 4185: for(ptr = cfg;*cfg && *cfg != ' ' && *cfg != '\t'; cfg++); ! 4186: if(*cfg) { ! 4187: *cfg = '\0'; ! 4188: cfg++; ! 4189: } ! 4190: if(*ptr) ! 4191: floppy_setup(get_options(ptr,ints),ints); ! 4192: } ! 4193: } ! 4194: ! 4195: static void mod_setup(char *pattern, void (*setup)(char *, int *)) ! 4196: { ! 4197: unsigned long i; ! 4198: char c; ! 4199: int j; ! 4200: int match; ! 4201: char buffer[100]; ! 4202: int ints[11]; ! 4203: int length = strlen(pattern)+1; ! 4204: ! 4205: match=0; ! 4206: j=1; ! 4207: ! 4208: for (i=current->mm->env_start; i< current->mm->env_end; i ++){ ! 4209: c= get_fs_byte(i); ! 4210: if (match){ ! 4211: if (j==99) ! 4212: c='\0'; ! 4213: buffer[j] = c; ! 4214: if (!c || c == ' ' || c == '\t'){ ! 4215: if (j){ ! 4216: buffer[j] = '\0'; ! 4217: setup(get_options(buffer,ints),ints); ! 4218: } ! 4219: j=0; ! 4220: } else ! 4221: j++; ! 4222: if (!c) ! 4223: break; ! 4224: continue; ! 4225: } ! 4226: if ((!j && !c) || (j && c == pattern[j-1])) ! 4227: j++; ! 4228: else ! 4229: j=0; ! 4230: if (j==length){ ! 4231: match=1; ! 4232: j=0; ! 4233: } ! 4234: } ! 4235: } ! 4236: ! 4237: ! 4238: #ifdef __cplusplus ! 4239: extern "C" { ! 4240: #endif ! 4241: int init_module(void) ! 4242: { ! 4243: printk(KERN_INFO "inserting floppy driver for %s\n", kernel_version); ! 4244: ! 4245: if(floppy) ! 4246: parse_floppy_cfg_string(floppy); ! 4247: else ! 4248: mod_setup("floppy=", floppy_setup); ! 4249: ! 4250: return floppy_init(); ! 4251: } ! 4252: ! 4253: void cleanup_module(void) ! 4254: { ! 4255: int fdc, dummy; ! 4256: ! 4257: for (fdc=0; fdc<2; fdc++) ! 4258: if (FDCS->address != -1){ ! 4259: release_region(FDCS->address, 6); ! 4260: release_region(FDCS->address+7, 1); ! 4261: } ! 4262: ! 4263: unregister_blkdev(MAJOR_NR, "fd"); ! 4264: ! 4265: blk_dev[MAJOR_NR].request_fn = 0; ! 4266: /* eject disk, if any */ ! 4267: dummy = fd_eject(0); ! 4268: } ! 4269: ! 4270: #ifdef __cplusplus ! 4271: } ! 4272: #endif ! 4273: ! 4274: #else ! 4275: /* eject the boot floppy (if we need the drive for a different root floppy) */ ! 4276: /* This should only be called at boot time when we're sure that there's no ! 4277: * resource contention. */ ! 4278: void floppy_eject(void) ! 4279: { ! 4280: int dummy; ! 4281: if(floppy_grab_irq_and_dma()==0) ! 4282: { ! 4283: lock_fdc(MAXTIMEOUT,0); ! 4284: dummy=fd_eject(0); ! 4285: process_fd_request(); ! 4286: floppy_release_irq_and_dma(); ! 4287: } ! 4288: } ! 4289: #endif
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