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