Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/block/floppy.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * Copyright (C) 1993, 1994 Alain Knaff | |
6 | * Copyright (C) 1998 Alan Cox | |
7 | */ | |
06f748c4 | 8 | |
1da177e4 LT |
9 | /* |
10 | * 02.12.91 - Changed to static variables to indicate need for reset | |
11 | * and recalibrate. This makes some things easier (output_byte reset | |
12 | * checking etc), and means less interrupt jumping in case of errors, | |
13 | * so the code is hopefully easier to understand. | |
14 | */ | |
15 | ||
16 | /* | |
17 | * This file is certainly a mess. I've tried my best to get it working, | |
18 | * but I don't like programming floppies, and I have only one anyway. | |
19 | * Urgel. I should check for more errors, and do more graceful error | |
20 | * recovery. Seems there are problems with several drives. I've tried to | |
21 | * correct them. No promises. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * As with hd.c, all routines within this file can (and will) be called | |
26 | * by interrupts, so extreme caution is needed. A hardware interrupt | |
27 | * handler may not sleep, or a kernel panic will happen. Thus I cannot | |
28 | * call "floppy-on" directly, but have to set a special timer interrupt | |
29 | * etc. | |
30 | */ | |
31 | ||
32 | /* | |
33 | * 28.02.92 - made track-buffering routines, based on the routines written | |
34 | * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * Automatic floppy-detection and formatting written by Werner Almesberger | |
39 | * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with | |
40 | * the floppy-change signal detection. | |
41 | */ | |
42 | ||
43 | /* | |
44 | * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed | |
45 | * FDC data overrun bug, added some preliminary stuff for vertical | |
46 | * recording support. | |
47 | * | |
48 | * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. | |
49 | * | |
50 | * TODO: Errors are still not counted properly. | |
51 | */ | |
52 | ||
53 | /* 1992/9/20 | |
54 | * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) | |
55 | * modeled after the freeware MS-DOS program fdformat/88 V1.8 by | |
56 | * Christoph H. Hochst\"atter. | |
57 | * I have fixed the shift values to the ones I always use. Maybe a new | |
58 | * ioctl() should be created to be able to modify them. | |
59 | * There is a bug in the driver that makes it impossible to format a | |
60 | * floppy as the first thing after bootup. | |
61 | */ | |
62 | ||
63 | /* | |
64 | * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and | |
65 | * this helped the floppy driver as well. Much cleaner, and still seems to | |
66 | * work. | |
67 | */ | |
68 | ||
69 | /* 1994/6/24 --bbroad-- added the floppy table entries and made | |
70 | * minor modifications to allow 2.88 floppies to be run. | |
71 | */ | |
72 | ||
73 | /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more | |
74 | * disk types. | |
75 | */ | |
76 | ||
77 | /* | |
78 | * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger | |
79 | * format bug fixes, but unfortunately some new bugs too... | |
80 | */ | |
81 | ||
82 | /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write | |
83 | * errors to allow safe writing by specialized programs. | |
84 | */ | |
85 | ||
86 | /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks | |
87 | * by defining bit 1 of the "stretch" parameter to mean put sectors on the | |
88 | * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's | |
89 | * drives are "upside-down"). | |
90 | */ | |
91 | ||
92 | /* | |
93 | * 1995/8/26 -- Andreas Busse -- added Mips support. | |
94 | */ | |
95 | ||
96 | /* | |
97 | * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent | |
98 | * features to asm/floppy.h. | |
99 | */ | |
100 | ||
b88b0985 JN |
101 | /* |
102 | * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support | |
103 | */ | |
104 | ||
1da177e4 LT |
105 | /* |
106 | * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of | |
107 | * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & | |
108 | * use of '0' for NULL. | |
109 | */ | |
110 | ||
111 | /* | |
112 | * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation | |
113 | * failures. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. | |
118 | */ | |
119 | ||
120 | /* | |
121 | * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 | |
122 | * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were | |
123 | * being used to store jiffies, which are unsigned longs). | |
124 | */ | |
125 | ||
126 | /* | |
127 | * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
128 | * - get rid of check_region | |
129 | * - s/suser/capable/ | |
130 | */ | |
131 | ||
132 | /* | |
133 | * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no | |
134 | * floppy controller (lingering task on list after module is gone... boom.) | |
135 | */ | |
136 | ||
137 | /* | |
138 | * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range | |
139 | * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix | |
140 | * requires many non-obvious changes in arch dependent code. | |
141 | */ | |
142 | ||
143 | /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. | |
144 | * Better audit of register_blkdev. | |
145 | */ | |
146 | ||
147 | #define FLOPPY_SANITY_CHECK | |
148 | #undef FLOPPY_SILENT_DCL_CLEAR | |
149 | ||
150 | #define REALLY_SLOW_IO | |
151 | ||
152 | #define DEBUGT 2 | |
06f748c4 | 153 | #define DCL_DEBUG /* debug disk change line */ |
1da177e4 LT |
154 | |
155 | /* do print messages for unexpected interrupts */ | |
156 | static int print_unex = 1; | |
157 | #include <linux/module.h> | |
158 | #include <linux/sched.h> | |
159 | #include <linux/fs.h> | |
160 | #include <linux/kernel.h> | |
161 | #include <linux/timer.h> | |
162 | #include <linux/workqueue.h> | |
163 | #define FDPATCHES | |
164 | #include <linux/fdreg.h> | |
1da177e4 LT |
165 | #include <linux/fd.h> |
166 | #include <linux/hdreg.h> | |
1da177e4 LT |
167 | #include <linux/errno.h> |
168 | #include <linux/slab.h> | |
169 | #include <linux/mm.h> | |
170 | #include <linux/bio.h> | |
171 | #include <linux/string.h> | |
50297cbf | 172 | #include <linux/jiffies.h> |
1da177e4 LT |
173 | #include <linux/fcntl.h> |
174 | #include <linux/delay.h> | |
175 | #include <linux/mc146818rtc.h> /* CMOS defines */ | |
176 | #include <linux/ioport.h> | |
177 | #include <linux/interrupt.h> | |
178 | #include <linux/init.h> | |
d052d1be | 179 | #include <linux/platform_device.h> |
1da177e4 | 180 | #include <linux/buffer_head.h> /* for invalidate_buffers() */ |
b1c82b5c | 181 | #include <linux/mutex.h> |
1da177e4 LT |
182 | |
183 | /* | |
184 | * PS/2 floppies have much slower step rates than regular floppies. | |
185 | * It's been recommended that take about 1/4 of the default speed | |
186 | * in some more extreme cases. | |
187 | */ | |
188 | static int slow_floppy; | |
189 | ||
190 | #include <asm/dma.h> | |
191 | #include <asm/irq.h> | |
192 | #include <asm/system.h> | |
193 | #include <asm/io.h> | |
194 | #include <asm/uaccess.h> | |
195 | ||
196 | static int FLOPPY_IRQ = 6; | |
197 | static int FLOPPY_DMA = 2; | |
198 | static int can_use_virtual_dma = 2; | |
199 | /* ======= | |
200 | * can use virtual DMA: | |
201 | * 0 = use of virtual DMA disallowed by config | |
202 | * 1 = use of virtual DMA prescribed by config | |
203 | * 2 = no virtual DMA preference configured. By default try hard DMA, | |
204 | * but fall back on virtual DMA when not enough memory available | |
205 | */ | |
206 | ||
207 | static int use_virtual_dma; | |
208 | /* ======= | |
209 | * use virtual DMA | |
210 | * 0 using hard DMA | |
211 | * 1 using virtual DMA | |
212 | * This variable is set to virtual when a DMA mem problem arises, and | |
213 | * reset back in floppy_grab_irq_and_dma. | |
214 | * It is not safe to reset it in other circumstances, because the floppy | |
215 | * driver may have several buffers in use at once, and we do currently not | |
216 | * record each buffers capabilities | |
217 | */ | |
218 | ||
219 | static DEFINE_SPINLOCK(floppy_lock); | |
220 | static struct completion device_release; | |
221 | ||
222 | static unsigned short virtual_dma_port = 0x3f0; | |
7d12e780 | 223 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 | 224 | static int set_dor(int fdc, char mask, char data); |
1da177e4 LT |
225 | |
226 | #define K_64 0x10000 /* 64KB */ | |
227 | ||
228 | /* the following is the mask of allowed drives. By default units 2 and | |
229 | * 3 of both floppy controllers are disabled, because switching on the | |
230 | * motor of these drives causes system hangs on some PCI computers. drive | |
231 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if | |
232 | * a drive is allowed. | |
233 | * | |
234 | * NOTE: This must come before we include the arch floppy header because | |
235 | * some ports reference this variable from there. -DaveM | |
236 | */ | |
237 | ||
238 | static int allowed_drive_mask = 0x33; | |
239 | ||
240 | #include <asm/floppy.h> | |
241 | ||
242 | static int irqdma_allocated; | |
243 | ||
1da177e4 LT |
244 | #define DEVICE_NAME "floppy" |
245 | ||
246 | #include <linux/blkdev.h> | |
247 | #include <linux/blkpg.h> | |
248 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ | |
249 | #include <linux/completion.h> | |
250 | ||
251 | static struct request *current_req; | |
252 | static struct request_queue *floppy_queue; | |
165125e1 | 253 | static void do_fd_request(struct request_queue * q); |
1da177e4 LT |
254 | |
255 | #ifndef fd_get_dma_residue | |
256 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) | |
257 | #endif | |
258 | ||
259 | /* Dma Memory related stuff */ | |
260 | ||
261 | #ifndef fd_dma_mem_free | |
262 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) | |
263 | #endif | |
264 | ||
265 | #ifndef fd_dma_mem_alloc | |
266 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL,get_order(size)) | |
267 | #endif | |
268 | ||
269 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) | |
270 | { | |
271 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA | |
272 | if (*addr) | |
273 | return; /* we have the memory */ | |
274 | if (can_use_virtual_dma != 2) | |
275 | return; /* no fallback allowed */ | |
06f748c4 | 276 | printk("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
1da177e4 LT |
277 | *addr = (char *)nodma_mem_alloc(l); |
278 | #else | |
279 | return; | |
280 | #endif | |
281 | } | |
282 | ||
283 | /* End dma memory related stuff */ | |
284 | ||
285 | static unsigned long fake_change; | |
286 | static int initialising = 1; | |
287 | ||
288 | #define ITYPE(x) (((x)>>2) & 0x1f) | |
289 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) | |
290 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ | |
291 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ | |
06f748c4 | 292 | /* reverse mapping from unit and fdc to drive */ |
1da177e4 | 293 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
1da177e4 LT |
294 | #define DP (&drive_params[current_drive]) |
295 | #define DRS (&drive_state[current_drive]) | |
296 | #define DRWE (&write_errors[current_drive]) | |
297 | #define FDCS (&fdc_state[fdc]) | |
7b8f850b RB |
298 | #define CLEARF(x) clear_bit(x##_BIT, &DRS->flags) |
299 | #define SETF(x) set_bit(x##_BIT, &DRS->flags) | |
300 | #define TESTF(x) test_bit(x##_BIT, &DRS->flags) | |
1da177e4 LT |
301 | |
302 | #define UDP (&drive_params[drive]) | |
303 | #define UDRS (&drive_state[drive]) | |
304 | #define UDRWE (&write_errors[drive]) | |
305 | #define UFDCS (&fdc_state[FDC(drive)]) | |
7b8f850b RB |
306 | #define UCLEARF(x) clear_bit(x##_BIT, &UDRS->flags) |
307 | #define USETF(x) set_bit(x##_BIT, &UDRS->flags) | |
308 | #define UTESTF(x) test_bit(x##_BIT, &UDRS->flags) | |
1da177e4 LT |
309 | |
310 | #define DPRINT(format, args...) printk(DEVICE_NAME "%d: " format, current_drive , ## args) | |
311 | ||
312 | #define PH_HEAD(floppy,head) (((((floppy)->stretch & 2) >>1) ^ head) << 2) | |
313 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) | |
314 | ||
315 | #define CLEARSTRUCT(x) memset((x), 0, sizeof(*(x))) | |
316 | ||
317 | /* read/write */ | |
318 | #define COMMAND raw_cmd->cmd[0] | |
319 | #define DR_SELECT raw_cmd->cmd[1] | |
320 | #define TRACK raw_cmd->cmd[2] | |
321 | #define HEAD raw_cmd->cmd[3] | |
322 | #define SECTOR raw_cmd->cmd[4] | |
323 | #define SIZECODE raw_cmd->cmd[5] | |
324 | #define SECT_PER_TRACK raw_cmd->cmd[6] | |
325 | #define GAP raw_cmd->cmd[7] | |
326 | #define SIZECODE2 raw_cmd->cmd[8] | |
327 | #define NR_RW 9 | |
328 | ||
329 | /* format */ | |
330 | #define F_SIZECODE raw_cmd->cmd[2] | |
331 | #define F_SECT_PER_TRACK raw_cmd->cmd[3] | |
332 | #define F_GAP raw_cmd->cmd[4] | |
333 | #define F_FILL raw_cmd->cmd[5] | |
334 | #define NR_F 6 | |
335 | ||
336 | /* | |
337 | * Maximum disk size (in kilobytes). This default is used whenever the | |
338 | * current disk size is unknown. | |
339 | * [Now it is rather a minimum] | |
340 | */ | |
341 | #define MAX_DISK_SIZE 4 /* 3984 */ | |
342 | ||
343 | /* | |
344 | * globals used by 'result()' | |
345 | */ | |
346 | #define MAX_REPLIES 16 | |
347 | static unsigned char reply_buffer[MAX_REPLIES]; | |
348 | static int inr; /* size of reply buffer, when called from interrupt */ | |
349 | #define ST0 (reply_buffer[0]) | |
350 | #define ST1 (reply_buffer[1]) | |
351 | #define ST2 (reply_buffer[2]) | |
352 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ | |
353 | #define R_TRACK (reply_buffer[3]) | |
354 | #define R_HEAD (reply_buffer[4]) | |
355 | #define R_SECTOR (reply_buffer[5]) | |
356 | #define R_SIZECODE (reply_buffer[6]) | |
1da177e4 LT |
357 | #define SEL_DLY (2*HZ/100) |
358 | ||
359 | /* | |
360 | * this struct defines the different floppy drive types. | |
361 | */ | |
362 | static struct { | |
363 | struct floppy_drive_params params; | |
364 | const char *name; /* name printed while booting */ | |
365 | } default_drive_params[] = { | |
366 | /* NOTE: the time values in jiffies should be in msec! | |
367 | CMOS drive type | |
368 | | Maximum data rate supported by drive type | |
369 | | | Head load time, msec | |
370 | | | | Head unload time, msec (not used) | |
371 | | | | | Step rate interval, usec | |
372 | | | | | | Time needed for spinup time (jiffies) | |
373 | | | | | | | Timeout for spinning down (jiffies) | |
374 | | | | | | | | Spindown offset (where disk stops) | |
375 | | | | | | | | | Select delay | |
376 | | | | | | | | | | RPS | |
377 | | | | | | | | | | | Max number of tracks | |
378 | | | | | | | | | | | | Interrupt timeout | |
379 | | | | | | | | | | | | | Max nonintlv. sectors | |
380 | | | | | | | | | | | | | | -Max Errors- flags */ | |
381 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, | |
382 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, | |
383 | ||
384 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, | |
385 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ | |
386 | ||
387 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, | |
388 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ | |
389 | ||
390 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
391 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ | |
392 | ||
393 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
394 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ | |
395 | ||
396 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
397 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ | |
398 | ||
399 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
400 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ | |
401 | /* | --autodetected formats--- | | | | |
402 | * read_track | | Name printed when booting | |
403 | * | Native format | |
404 | * Frequency of disk change checks */ | |
405 | }; | |
406 | ||
407 | static struct floppy_drive_params drive_params[N_DRIVE]; | |
408 | static struct floppy_drive_struct drive_state[N_DRIVE]; | |
409 | static struct floppy_write_errors write_errors[N_DRIVE]; | |
410 | static struct timer_list motor_off_timer[N_DRIVE]; | |
411 | static struct gendisk *disks[N_DRIVE]; | |
412 | static struct block_device *opened_bdev[N_DRIVE]; | |
b1c82b5c | 413 | static DEFINE_MUTEX(open_lock); |
1da177e4 LT |
414 | static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
415 | ||
416 | /* | |
417 | * This struct defines the different floppy types. | |
418 | * | |
419 | * Bit 0 of 'stretch' tells if the tracks need to be doubled for some | |
420 | * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' | |
421 | * tells if the disk is in Commodore 1581 format, which means side 0 sectors | |
422 | * are located on side 1 of the disk but with a side 0 ID, and vice-versa. | |
423 | * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the | |
424 | * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical | |
425 | * side 0 is on physical side 0 (but with the misnamed sector IDs). | |
426 | * 'stretch' should probably be renamed to something more general, like | |
427 | * 'options'. Other parameters should be self-explanatory (see also | |
428 | * setfdprm(8)). | |
429 | */ | |
430 | /* | |
431 | Size | |
432 | | Sectors per track | |
433 | | | Head | |
434 | | | | Tracks | |
435 | | | | | Stretch | |
436 | | | | | | Gap 1 size | |
437 | | | | | | | Data rate, | 0x40 for perp | |
438 | | | | | | | | Spec1 (stepping rate, head unload | |
439 | | | | | | | | | /fmt gap (gap2) */ | |
440 | static struct floppy_struct floppy_type[32] = { | |
441 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ | |
442 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ | |
443 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ | |
444 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ | |
445 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ | |
446 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ | |
447 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ | |
448 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ | |
449 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ | |
450 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ | |
451 | ||
452 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ | |
453 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ | |
454 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ | |
455 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ | |
456 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ | |
457 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ | |
458 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ | |
459 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ | |
460 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ | |
461 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ | |
462 | ||
463 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ | |
464 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ | |
465 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ | |
466 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ | |
467 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ | |
468 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ | |
469 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ | |
470 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ | |
471 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ | |
1da177e4 | 472 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
06f748c4 | 473 | |
1da177e4 LT |
474 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
475 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ | |
476 | }; | |
477 | ||
1da177e4 LT |
478 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
479 | ||
480 | /* Auto-detection: Disk type used until the next media change occurs. */ | |
481 | static struct floppy_struct *current_type[N_DRIVE]; | |
482 | ||
483 | /* | |
484 | * User-provided type information. current_type points to | |
485 | * the respective entry of this array. | |
486 | */ | |
487 | static struct floppy_struct user_params[N_DRIVE]; | |
488 | ||
489 | static sector_t floppy_sizes[256]; | |
490 | ||
94fd0db7 HR |
491 | static char floppy_device_name[] = "floppy"; |
492 | ||
1da177e4 LT |
493 | /* |
494 | * The driver is trying to determine the correct media format | |
495 | * while probing is set. rw_interrupt() clears it after a | |
496 | * successful access. | |
497 | */ | |
498 | static int probing; | |
499 | ||
500 | /* Synchronization of FDC access. */ | |
501 | #define FD_COMMAND_NONE -1 | |
502 | #define FD_COMMAND_ERROR 2 | |
503 | #define FD_COMMAND_OKAY 3 | |
504 | ||
505 | static volatile int command_status = FD_COMMAND_NONE; | |
506 | static unsigned long fdc_busy; | |
507 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
508 | static DECLARE_WAIT_QUEUE_HEAD(command_done); | |
509 | ||
510 | #define NO_SIGNAL (!interruptible || !signal_pending(current)) | |
511 | #define CALL(x) if ((x) == -EINTR) return -EINTR | |
512 | #define ECALL(x) if ((ret = (x))) return ret; | |
513 | #define _WAIT(x,i) CALL(ret=wait_til_done((x),i)) | |
514 | #define WAIT(x) _WAIT((x),interruptible) | |
515 | #define IWAIT(x) _WAIT((x),1) | |
516 | ||
517 | /* Errors during formatting are counted here. */ | |
518 | static int format_errors; | |
519 | ||
520 | /* Format request descriptor. */ | |
521 | static struct format_descr format_req; | |
522 | ||
523 | /* | |
524 | * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps | |
525 | * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), | |
526 | * H is head unload time (1=16ms, 2=32ms, etc) | |
527 | */ | |
528 | ||
529 | /* | |
530 | * Track buffer | |
531 | * Because these are written to by the DMA controller, they must | |
532 | * not contain a 64k byte boundary crossing, or data will be | |
533 | * corrupted/lost. | |
534 | */ | |
535 | static char *floppy_track_buffer; | |
536 | static int max_buffer_sectors; | |
537 | ||
538 | static int *errors; | |
06f748c4 | 539 | typedef void (*done_f)(int); |
1da177e4 | 540 | static struct cont_t { |
06f748c4 | 541 | void (*interrupt)(void); /* this is called after the interrupt of the |
1da177e4 | 542 | * main command */ |
06f748c4 JJ |
543 | void (*redo)(void); /* this is called to retry the operation */ |
544 | void (*error)(void); /* this is called to tally an error */ | |
1da177e4 LT |
545 | done_f done; /* this is called to say if the operation has |
546 | * succeeded/failed */ | |
547 | } *cont; | |
548 | ||
549 | static void floppy_ready(void); | |
550 | static void floppy_start(void); | |
551 | static void process_fd_request(void); | |
552 | static void recalibrate_floppy(void); | |
553 | static void floppy_shutdown(unsigned long); | |
554 | ||
555 | static int floppy_grab_irq_and_dma(void); | |
556 | static void floppy_release_irq_and_dma(void); | |
557 | ||
558 | /* | |
559 | * The "reset" variable should be tested whenever an interrupt is scheduled, | |
560 | * after the commands have been sent. This is to ensure that the driver doesn't | |
561 | * get wedged when the interrupt doesn't come because of a failed command. | |
562 | * reset doesn't need to be tested before sending commands, because | |
563 | * output_byte is automatically disabled when reset is set. | |
564 | */ | |
565 | #define CHECK_RESET { if (FDCS->reset){ reset_fdc(); return; } } | |
566 | static void reset_fdc(void); | |
567 | ||
568 | /* | |
569 | * These are global variables, as that's the easiest way to give | |
570 | * information to interrupts. They are the data used for the current | |
571 | * request. | |
572 | */ | |
573 | #define NO_TRACK -1 | |
574 | #define NEED_1_RECAL -2 | |
575 | #define NEED_2_RECAL -3 | |
576 | ||
577 | static int usage_count; | |
578 | ||
579 | /* buffer related variables */ | |
580 | static int buffer_track = -1; | |
581 | static int buffer_drive = -1; | |
582 | static int buffer_min = -1; | |
583 | static int buffer_max = -1; | |
584 | ||
585 | /* fdc related variables, should end up in a struct */ | |
586 | static struct floppy_fdc_state fdc_state[N_FDC]; | |
587 | static int fdc; /* current fdc */ | |
588 | ||
589 | static struct floppy_struct *_floppy = floppy_type; | |
590 | static unsigned char current_drive; | |
591 | static long current_count_sectors; | |
592 | static unsigned char fsector_t; /* sector in track */ | |
593 | static unsigned char in_sector_offset; /* offset within physical sector, | |
594 | * expressed in units of 512 bytes */ | |
595 | ||
596 | #ifndef fd_eject | |
597 | static inline int fd_eject(int drive) | |
598 | { | |
599 | return -EINVAL; | |
600 | } | |
601 | #endif | |
602 | ||
603 | /* | |
604 | * Debugging | |
605 | * ========= | |
606 | */ | |
607 | #ifdef DEBUGT | |
608 | static long unsigned debugtimer; | |
609 | ||
610 | static inline void set_debugt(void) | |
611 | { | |
612 | debugtimer = jiffies; | |
613 | } | |
614 | ||
615 | static inline void debugt(const char *message) | |
616 | { | |
617 | if (DP->flags & DEBUGT) | |
618 | printk("%s dtime=%lu\n", message, jiffies - debugtimer); | |
619 | } | |
620 | #else | |
621 | static inline void set_debugt(void) { } | |
622 | static inline void debugt(const char *message) { } | |
623 | #endif /* DEBUGT */ | |
624 | ||
625 | typedef void (*timeout_fn) (unsigned long); | |
8d06afab | 626 | static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); |
1da177e4 LT |
627 | |
628 | static const char *timeout_message; | |
629 | ||
630 | #ifdef FLOPPY_SANITY_CHECK | |
631 | static void is_alive(const char *message) | |
632 | { | |
633 | /* this routine checks whether the floppy driver is "alive" */ | |
634 | if (test_bit(0, &fdc_busy) && command_status < 2 | |
635 | && !timer_pending(&fd_timeout)) { | |
636 | DPRINT("timeout handler died: %s\n", message); | |
637 | } | |
638 | } | |
639 | #endif | |
640 | ||
641 | static void (*do_floppy) (void) = NULL; | |
642 | ||
643 | #ifdef FLOPPY_SANITY_CHECK | |
644 | ||
645 | #define OLOGSIZE 20 | |
646 | ||
647 | static void (*lasthandler) (void); | |
648 | static unsigned long interruptjiffies; | |
649 | static unsigned long resultjiffies; | |
650 | static int resultsize; | |
651 | static unsigned long lastredo; | |
652 | ||
653 | static struct output_log { | |
654 | unsigned char data; | |
655 | unsigned char status; | |
656 | unsigned long jiffies; | |
657 | } output_log[OLOGSIZE]; | |
658 | ||
659 | static int output_log_pos; | |
660 | #endif | |
661 | ||
662 | #define current_reqD -1 | |
663 | #define MAXTIMEOUT -2 | |
664 | ||
665 | static void __reschedule_timeout(int drive, const char *message, int marg) | |
666 | { | |
667 | if (drive == current_reqD) | |
668 | drive = current_drive; | |
669 | del_timer(&fd_timeout); | |
4acb3e2f | 670 | if (drive < 0 || drive >= N_DRIVE) { |
1da177e4 LT |
671 | fd_timeout.expires = jiffies + 20UL * HZ; |
672 | drive = 0; | |
673 | } else | |
674 | fd_timeout.expires = jiffies + UDP->timeout; | |
675 | add_timer(&fd_timeout); | |
676 | if (UDP->flags & FD_DEBUG) { | |
677 | DPRINT("reschedule timeout "); | |
678 | printk(message, marg); | |
679 | printk("\n"); | |
680 | } | |
681 | timeout_message = message; | |
682 | } | |
683 | ||
684 | static void reschedule_timeout(int drive, const char *message, int marg) | |
685 | { | |
686 | unsigned long flags; | |
687 | ||
688 | spin_lock_irqsave(&floppy_lock, flags); | |
689 | __reschedule_timeout(drive, message, marg); | |
690 | spin_unlock_irqrestore(&floppy_lock, flags); | |
691 | } | |
692 | ||
693 | #define INFBOUND(a,b) (a)=max_t(int, a, b) | |
1da177e4 LT |
694 | #define SUPBOUND(a,b) (a)=min_t(int, a, b) |
695 | ||
696 | /* | |
697 | * Bottom half floppy driver. | |
698 | * ========================== | |
699 | * | |
700 | * This part of the file contains the code talking directly to the hardware, | |
701 | * and also the main service loop (seek-configure-spinup-command) | |
702 | */ | |
703 | ||
704 | /* | |
705 | * disk change. | |
706 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, | |
707 | * and the last_checked date. | |
708 | * | |
709 | * last_checked is the date of the last check which showed 'no disk change' | |
710 | * FD_DISK_CHANGE is set under two conditions: | |
711 | * 1. The floppy has been changed after some i/o to that floppy already | |
712 | * took place. | |
713 | * 2. No floppy disk is in the drive. This is done in order to ensure that | |
714 | * requests are quickly flushed in case there is no disk in the drive. It | |
715 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in | |
716 | * the drive. | |
717 | * | |
718 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. | |
719 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on | |
720 | * each seek. If a disk is present, the disk change line should also be | |
721 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk | |
722 | * change line is set, this means either that no disk is in the drive, or | |
723 | * that it has been removed since the last seek. | |
724 | * | |
725 | * This means that we really have a third possibility too: | |
726 | * The floppy has been changed after the last seek. | |
727 | */ | |
728 | ||
729 | static int disk_change(int drive) | |
730 | { | |
731 | int fdc = FDC(drive); | |
06f748c4 | 732 | |
1da177e4 | 733 | #ifdef FLOPPY_SANITY_CHECK |
50297cbf | 734 | if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) |
1da177e4 LT |
735 | DPRINT("WARNING disk change called early\n"); |
736 | if (!(FDCS->dor & (0x10 << UNIT(drive))) || | |
737 | (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { | |
738 | DPRINT("probing disk change on unselected drive\n"); | |
739 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), | |
740 | (unsigned int)FDCS->dor); | |
741 | } | |
742 | #endif | |
743 | ||
744 | #ifdef DCL_DEBUG | |
745 | if (UDP->flags & FD_DEBUG) { | |
746 | DPRINT("checking disk change line for drive %d\n", drive); | |
747 | DPRINT("jiffies=%lu\n", jiffies); | |
748 | DPRINT("disk change line=%x\n", fd_inb(FD_DIR) & 0x80); | |
749 | DPRINT("flags=%lx\n", UDRS->flags); | |
750 | } | |
751 | #endif | |
752 | if (UDP->flags & FD_BROKEN_DCL) | |
753 | return UTESTF(FD_DISK_CHANGED); | |
754 | if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { | |
755 | USETF(FD_VERIFY); /* verify write protection */ | |
756 | if (UDRS->maxblock) { | |
757 | /* mark it changed */ | |
758 | USETF(FD_DISK_CHANGED); | |
759 | } | |
760 | ||
761 | /* invalidate its geometry */ | |
762 | if (UDRS->keep_data >= 0) { | |
763 | if ((UDP->flags & FTD_MSG) && | |
764 | current_type[drive] != NULL) | |
765 | DPRINT("Disk type is undefined after " | |
766 | "disk change\n"); | |
767 | current_type[drive] = NULL; | |
768 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; | |
769 | } | |
770 | ||
1da177e4 LT |
771 | return 1; |
772 | } else { | |
773 | UDRS->last_checked = jiffies; | |
774 | UCLEARF(FD_DISK_NEWCHANGE); | |
775 | } | |
776 | return 0; | |
777 | } | |
778 | ||
779 | static inline int is_selected(int dor, int unit) | |
780 | { | |
781 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); | |
782 | } | |
783 | ||
784 | static int set_dor(int fdc, char mask, char data) | |
785 | { | |
fdc1ca8a JJ |
786 | unsigned char unit; |
787 | unsigned char drive; | |
788 | unsigned char newdor; | |
789 | unsigned char olddor; | |
1da177e4 LT |
790 | |
791 | if (FDCS->address == -1) | |
792 | return -1; | |
793 | ||
794 | olddor = FDCS->dor; | |
795 | newdor = (olddor & mask) | data; | |
796 | if (newdor != olddor) { | |
797 | unit = olddor & 0x3; | |
798 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { | |
799 | drive = REVDRIVE(fdc, unit); | |
800 | #ifdef DCL_DEBUG | |
801 | if (UDP->flags & FD_DEBUG) { | |
802 | DPRINT("calling disk change from set_dor\n"); | |
803 | } | |
804 | #endif | |
805 | disk_change(drive); | |
806 | } | |
807 | FDCS->dor = newdor; | |
808 | fd_outb(newdor, FD_DOR); | |
809 | ||
810 | unit = newdor & 0x3; | |
811 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { | |
812 | drive = REVDRIVE(fdc, unit); | |
813 | UDRS->select_date = jiffies; | |
814 | } | |
815 | } | |
1da177e4 LT |
816 | return olddor; |
817 | } | |
818 | ||
819 | static void twaddle(void) | |
820 | { | |
821 | if (DP->select_delay) | |
822 | return; | |
823 | fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); | |
824 | fd_outb(FDCS->dor, FD_DOR); | |
825 | DRS->select_date = jiffies; | |
826 | } | |
827 | ||
828 | /* reset all driver information about the current fdc. This is needed after | |
829 | * a reset, and after a raw command. */ | |
830 | static void reset_fdc_info(int mode) | |
831 | { | |
832 | int drive; | |
833 | ||
834 | FDCS->spec1 = FDCS->spec2 = -1; | |
835 | FDCS->need_configure = 1; | |
836 | FDCS->perp_mode = 1; | |
837 | FDCS->rawcmd = 0; | |
838 | for (drive = 0; drive < N_DRIVE; drive++) | |
839 | if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) | |
840 | UDRS->track = NEED_2_RECAL; | |
841 | } | |
842 | ||
843 | /* selects the fdc and drive, and enables the fdc's input/dma. */ | |
844 | static void set_fdc(int drive) | |
845 | { | |
846 | if (drive >= 0 && drive < N_DRIVE) { | |
847 | fdc = FDC(drive); | |
848 | current_drive = drive; | |
849 | } | |
850 | if (fdc != 1 && fdc != 0) { | |
851 | printk("bad fdc value\n"); | |
852 | return; | |
853 | } | |
854 | set_dor(fdc, ~0, 8); | |
855 | #if N_FDC > 1 | |
856 | set_dor(1 - fdc, ~8, 0); | |
857 | #endif | |
858 | if (FDCS->rawcmd == 2) | |
859 | reset_fdc_info(1); | |
860 | if (fd_inb(FD_STATUS) != STATUS_READY) | |
861 | FDCS->reset = 1; | |
862 | } | |
863 | ||
864 | /* locks the driver */ | |
865 | static int _lock_fdc(int drive, int interruptible, int line) | |
866 | { | |
867 | if (!usage_count) { | |
868 | printk(KERN_ERR | |
869 | "Trying to lock fdc while usage count=0 at line %d\n", | |
870 | line); | |
871 | return -1; | |
872 | } | |
1da177e4 LT |
873 | |
874 | if (test_and_set_bit(0, &fdc_busy)) { | |
875 | DECLARE_WAITQUEUE(wait, current); | |
876 | add_wait_queue(&fdc_wait, &wait); | |
877 | ||
878 | for (;;) { | |
879 | set_current_state(TASK_INTERRUPTIBLE); | |
880 | ||
881 | if (!test_and_set_bit(0, &fdc_busy)) | |
882 | break; | |
883 | ||
884 | schedule(); | |
885 | ||
886 | if (!NO_SIGNAL) { | |
887 | remove_wait_queue(&fdc_wait, &wait); | |
888 | return -EINTR; | |
889 | } | |
890 | } | |
891 | ||
892 | set_current_state(TASK_RUNNING); | |
893 | remove_wait_queue(&fdc_wait, &wait); | |
3e541a4a | 894 | flush_scheduled_work(); |
1da177e4 LT |
895 | } |
896 | command_status = FD_COMMAND_NONE; | |
897 | ||
898 | __reschedule_timeout(drive, "lock fdc", 0); | |
899 | set_fdc(drive); | |
900 | return 0; | |
901 | } | |
902 | ||
903 | #define lock_fdc(drive,interruptible) _lock_fdc(drive,interruptible, __LINE__) | |
904 | ||
905 | #define LOCK_FDC(drive,interruptible) \ | |
906 | if (lock_fdc(drive,interruptible)) return -EINTR; | |
907 | ||
908 | /* unlocks the driver */ | |
909 | static inline void unlock_fdc(void) | |
910 | { | |
911 | unsigned long flags; | |
912 | ||
913 | raw_cmd = NULL; | |
914 | if (!test_bit(0, &fdc_busy)) | |
915 | DPRINT("FDC access conflict!\n"); | |
916 | ||
917 | if (do_floppy) | |
918 | DPRINT("device interrupt still active at FDC release: %p!\n", | |
919 | do_floppy); | |
920 | command_status = FD_COMMAND_NONE; | |
921 | spin_lock_irqsave(&floppy_lock, flags); | |
922 | del_timer(&fd_timeout); | |
923 | cont = NULL; | |
924 | clear_bit(0, &fdc_busy); | |
925 | if (elv_next_request(floppy_queue)) | |
926 | do_fd_request(floppy_queue); | |
927 | spin_unlock_irqrestore(&floppy_lock, flags); | |
1da177e4 LT |
928 | wake_up(&fdc_wait); |
929 | } | |
930 | ||
931 | /* switches the motor off after a given timeout */ | |
932 | static void motor_off_callback(unsigned long nr) | |
933 | { | |
934 | unsigned char mask = ~(0x10 << UNIT(nr)); | |
935 | ||
936 | set_dor(FDC(nr), mask, 0); | |
937 | } | |
938 | ||
939 | /* schedules motor off */ | |
940 | static void floppy_off(unsigned int drive) | |
941 | { | |
942 | unsigned long volatile delta; | |
fdc1ca8a | 943 | int fdc = FDC(drive); |
1da177e4 LT |
944 | |
945 | if (!(FDCS->dor & (0x10 << UNIT(drive)))) | |
946 | return; | |
947 | ||
948 | del_timer(motor_off_timer + drive); | |
949 | ||
950 | /* make spindle stop in a position which minimizes spinup time | |
951 | * next time */ | |
952 | if (UDP->rps) { | |
953 | delta = jiffies - UDRS->first_read_date + HZ - | |
954 | UDP->spindown_offset; | |
955 | delta = ((delta * UDP->rps) % HZ) / UDP->rps; | |
956 | motor_off_timer[drive].expires = | |
957 | jiffies + UDP->spindown - delta; | |
958 | } | |
959 | add_timer(motor_off_timer + drive); | |
960 | } | |
961 | ||
962 | /* | |
963 | * cycle through all N_DRIVE floppy drives, for disk change testing. | |
964 | * stopping at current drive. This is done before any long operation, to | |
965 | * be sure to have up to date disk change information. | |
966 | */ | |
967 | static void scandrives(void) | |
968 | { | |
06f748c4 JJ |
969 | int i; |
970 | int drive; | |
971 | int saved_drive; | |
1da177e4 LT |
972 | |
973 | if (DP->select_delay) | |
974 | return; | |
975 | ||
976 | saved_drive = current_drive; | |
977 | for (i = 0; i < N_DRIVE; i++) { | |
978 | drive = (saved_drive + i + 1) % N_DRIVE; | |
979 | if (UDRS->fd_ref == 0 || UDP->select_delay != 0) | |
980 | continue; /* skip closed drives */ | |
981 | set_fdc(drive); | |
982 | if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & | |
983 | (0x10 << UNIT(drive)))) | |
984 | /* switch the motor off again, if it was off to | |
985 | * begin with */ | |
986 | set_dor(fdc, ~(0x10 << UNIT(drive)), 0); | |
987 | } | |
988 | set_fdc(saved_drive); | |
989 | } | |
990 | ||
991 | static void empty(void) | |
992 | { | |
993 | } | |
994 | ||
65f27f38 | 995 | static DECLARE_WORK(floppy_work, NULL); |
1da177e4 LT |
996 | |
997 | static void schedule_bh(void (*handler) (void)) | |
998 | { | |
65f27f38 | 999 | PREPARE_WORK(&floppy_work, (work_func_t)handler); |
1da177e4 LT |
1000 | schedule_work(&floppy_work); |
1001 | } | |
1002 | ||
8d06afab | 1003 | static DEFINE_TIMER(fd_timer, NULL, 0, 0); |
1da177e4 LT |
1004 | |
1005 | static void cancel_activity(void) | |
1006 | { | |
1007 | unsigned long flags; | |
1008 | ||
1009 | spin_lock_irqsave(&floppy_lock, flags); | |
1010 | do_floppy = NULL; | |
65f27f38 | 1011 | PREPARE_WORK(&floppy_work, (work_func_t)empty); |
1da177e4 LT |
1012 | del_timer(&fd_timer); |
1013 | spin_unlock_irqrestore(&floppy_lock, flags); | |
1014 | } | |
1015 | ||
1016 | /* this function makes sure that the disk stays in the drive during the | |
1017 | * transfer */ | |
1018 | static void fd_watchdog(void) | |
1019 | { | |
1020 | #ifdef DCL_DEBUG | |
1021 | if (DP->flags & FD_DEBUG) { | |
1022 | DPRINT("calling disk change from watchdog\n"); | |
1023 | } | |
1024 | #endif | |
1025 | ||
1026 | if (disk_change(current_drive)) { | |
1027 | DPRINT("disk removed during i/o\n"); | |
1028 | cancel_activity(); | |
1029 | cont->done(0); | |
1030 | reset_fdc(); | |
1031 | } else { | |
1032 | del_timer(&fd_timer); | |
1033 | fd_timer.function = (timeout_fn) fd_watchdog; | |
1034 | fd_timer.expires = jiffies + HZ / 10; | |
1035 | add_timer(&fd_timer); | |
1036 | } | |
1037 | } | |
1038 | ||
1039 | static void main_command_interrupt(void) | |
1040 | { | |
1041 | del_timer(&fd_timer); | |
1042 | cont->interrupt(); | |
1043 | } | |
1044 | ||
1045 | /* waits for a delay (spinup or select) to pass */ | |
1046 | static int fd_wait_for_completion(unsigned long delay, timeout_fn function) | |
1047 | { | |
1048 | if (FDCS->reset) { | |
1049 | reset_fdc(); /* do the reset during sleep to win time | |
1050 | * if we don't need to sleep, it's a good | |
1051 | * occasion anyways */ | |
1052 | return 1; | |
1053 | } | |
1054 | ||
50297cbf | 1055 | if (time_before(jiffies, delay)) { |
1da177e4 LT |
1056 | del_timer(&fd_timer); |
1057 | fd_timer.function = function; | |
1058 | fd_timer.expires = delay; | |
1059 | add_timer(&fd_timer); | |
1060 | return 1; | |
1061 | } | |
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static DEFINE_SPINLOCK(floppy_hlt_lock); | |
1066 | static int hlt_disabled; | |
1067 | static void floppy_disable_hlt(void) | |
1068 | { | |
1069 | unsigned long flags; | |
1070 | ||
1071 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1072 | if (!hlt_disabled) { | |
1073 | hlt_disabled = 1; | |
1074 | #ifdef HAVE_DISABLE_HLT | |
1075 | disable_hlt(); | |
1076 | #endif | |
1077 | } | |
1078 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1079 | } | |
1080 | ||
1081 | static void floppy_enable_hlt(void) | |
1082 | { | |
1083 | unsigned long flags; | |
1084 | ||
1085 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1086 | if (hlt_disabled) { | |
1087 | hlt_disabled = 0; | |
1088 | #ifdef HAVE_DISABLE_HLT | |
1089 | enable_hlt(); | |
1090 | #endif | |
1091 | } | |
1092 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1093 | } | |
1094 | ||
1095 | static void setup_DMA(void) | |
1096 | { | |
1097 | unsigned long f; | |
1098 | ||
1099 | #ifdef FLOPPY_SANITY_CHECK | |
1100 | if (raw_cmd->length == 0) { | |
1101 | int i; | |
1102 | ||
1103 | printk("zero dma transfer size:"); | |
1104 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1105 | printk("%x,", raw_cmd->cmd[i]); | |
1106 | printk("\n"); | |
1107 | cont->done(0); | |
1108 | FDCS->reset = 1; | |
1109 | return; | |
1110 | } | |
1111 | if (((unsigned long)raw_cmd->kernel_data) % 512) { | |
1112 | printk("non aligned address: %p\n", raw_cmd->kernel_data); | |
1113 | cont->done(0); | |
1114 | FDCS->reset = 1; | |
1115 | return; | |
1116 | } | |
1117 | #endif | |
1118 | f = claim_dma_lock(); | |
1119 | fd_disable_dma(); | |
1120 | #ifdef fd_dma_setup | |
1121 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, | |
1122 | (raw_cmd->flags & FD_RAW_READ) ? | |
1123 | DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { | |
1124 | release_dma_lock(f); | |
1125 | cont->done(0); | |
1126 | FDCS->reset = 1; | |
1127 | return; | |
1128 | } | |
1129 | release_dma_lock(f); | |
1130 | #else | |
1131 | fd_clear_dma_ff(); | |
1132 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); | |
1133 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? | |
1134 | DMA_MODE_READ : DMA_MODE_WRITE); | |
1135 | fd_set_dma_addr(raw_cmd->kernel_data); | |
1136 | fd_set_dma_count(raw_cmd->length); | |
1137 | virtual_dma_port = FDCS->address; | |
1138 | fd_enable_dma(); | |
1139 | release_dma_lock(f); | |
1140 | #endif | |
1141 | floppy_disable_hlt(); | |
1142 | } | |
1143 | ||
1144 | static void show_floppy(void); | |
1145 | ||
1146 | /* waits until the fdc becomes ready */ | |
1147 | static int wait_til_ready(void) | |
1148 | { | |
06f748c4 JJ |
1149 | int status; |
1150 | int counter; | |
1151 | ||
1da177e4 LT |
1152 | if (FDCS->reset) |
1153 | return -1; | |
1154 | for (counter = 0; counter < 10000; counter++) { | |
1155 | status = fd_inb(FD_STATUS); | |
1156 | if (status & STATUS_READY) | |
1157 | return status; | |
1158 | } | |
1159 | if (!initialising) { | |
1160 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); | |
1161 | show_floppy(); | |
1162 | } | |
1163 | FDCS->reset = 1; | |
1164 | return -1; | |
1165 | } | |
1166 | ||
1167 | /* sends a command byte to the fdc */ | |
1168 | static int output_byte(char byte) | |
1169 | { | |
1170 | int status; | |
1171 | ||
1172 | if ((status = wait_til_ready()) < 0) | |
1173 | return -1; | |
1174 | if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) { | |
1175 | fd_outb(byte, FD_DATA); | |
1176 | #ifdef FLOPPY_SANITY_CHECK | |
1177 | output_log[output_log_pos].data = byte; | |
1178 | output_log[output_log_pos].status = status; | |
1179 | output_log[output_log_pos].jiffies = jiffies; | |
1180 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; | |
1181 | #endif | |
1182 | return 0; | |
1183 | } | |
1184 | FDCS->reset = 1; | |
1185 | if (!initialising) { | |
1186 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", | |
1187 | byte, fdc, status); | |
1188 | show_floppy(); | |
1189 | } | |
1190 | return -1; | |
1191 | } | |
1192 | ||
1193 | #define LAST_OUT(x) if (output_byte(x)<0){ reset_fdc();return;} | |
1194 | ||
1195 | /* gets the response from the fdc */ | |
1196 | static int result(void) | |
1197 | { | |
06f748c4 JJ |
1198 | int i; |
1199 | int status = 0; | |
1da177e4 LT |
1200 | |
1201 | for (i = 0; i < MAX_REPLIES; i++) { | |
1202 | if ((status = wait_til_ready()) < 0) | |
1203 | break; | |
1204 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; | |
1205 | if ((status & ~STATUS_BUSY) == STATUS_READY) { | |
1206 | #ifdef FLOPPY_SANITY_CHECK | |
1207 | resultjiffies = jiffies; | |
1208 | resultsize = i; | |
1209 | #endif | |
1210 | return i; | |
1211 | } | |
1212 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) | |
1213 | reply_buffer[i] = fd_inb(FD_DATA); | |
1214 | else | |
1215 | break; | |
1216 | } | |
1217 | if (!initialising) { | |
1218 | DPRINT | |
1219 | ("get result error. Fdc=%d Last status=%x Read bytes=%d\n", | |
1220 | fdc, status, i); | |
1221 | show_floppy(); | |
1222 | } | |
1223 | FDCS->reset = 1; | |
1224 | return -1; | |
1225 | } | |
1226 | ||
1227 | #define MORE_OUTPUT -2 | |
1228 | /* does the fdc need more output? */ | |
1229 | static int need_more_output(void) | |
1230 | { | |
1231 | int status; | |
06f748c4 | 1232 | |
1da177e4 LT |
1233 | if ((status = wait_til_ready()) < 0) |
1234 | return -1; | |
1235 | if ((status & (STATUS_READY | STATUS_DIR | STATUS_DMA)) == STATUS_READY) | |
1236 | return MORE_OUTPUT; | |
1237 | return result(); | |
1238 | } | |
1239 | ||
1240 | /* Set perpendicular mode as required, based on data rate, if supported. | |
1241 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. | |
1242 | */ | |
1243 | static inline void perpendicular_mode(void) | |
1244 | { | |
1245 | unsigned char perp_mode; | |
1246 | ||
1247 | if (raw_cmd->rate & 0x40) { | |
1248 | switch (raw_cmd->rate & 3) { | |
1249 | case 0: | |
1250 | perp_mode = 2; | |
1251 | break; | |
1252 | case 3: | |
1253 | perp_mode = 3; | |
1254 | break; | |
1255 | default: | |
1256 | DPRINT("Invalid data rate for perpendicular mode!\n"); | |
1257 | cont->done(0); | |
1258 | FDCS->reset = 1; /* convenient way to return to | |
1259 | * redo without to much hassle (deep | |
1260 | * stack et al. */ | |
1261 | return; | |
1262 | } | |
1263 | } else | |
1264 | perp_mode = 0; | |
1265 | ||
1266 | if (FDCS->perp_mode == perp_mode) | |
1267 | return; | |
1268 | if (FDCS->version >= FDC_82077_ORIG) { | |
1269 | output_byte(FD_PERPENDICULAR); | |
1270 | output_byte(perp_mode); | |
1271 | FDCS->perp_mode = perp_mode; | |
1272 | } else if (perp_mode) { | |
1273 | DPRINT("perpendicular mode not supported by this FDC.\n"); | |
1274 | } | |
1275 | } /* perpendicular_mode */ | |
1276 | ||
1277 | static int fifo_depth = 0xa; | |
1278 | static int no_fifo; | |
1279 | ||
1280 | static int fdc_configure(void) | |
1281 | { | |
1282 | /* Turn on FIFO */ | |
1283 | output_byte(FD_CONFIGURE); | |
1284 | if (need_more_output() != MORE_OUTPUT) | |
1285 | return 0; | |
1286 | output_byte(0); | |
1287 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); | |
1288 | output_byte(0); /* pre-compensation from track | |
1289 | 0 upwards */ | |
1290 | return 1; | |
1291 | } | |
1292 | ||
1293 | #define NOMINAL_DTR 500 | |
1294 | ||
1295 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, | |
1296 | * head load time, and DMA disable flag to values needed by floppy. | |
1297 | * | |
1298 | * The value "dtr" is the data transfer rate in Kbps. It is needed | |
1299 | * to account for the data rate-based scaling done by the 82072 and 82077 | |
1300 | * FDC types. This parameter is ignored for other types of FDCs (i.e. | |
1301 | * 8272a). | |
1302 | * | |
1303 | * Note that changing the data transfer rate has a (probably deleterious) | |
1304 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so | |
1305 | * fdc_specify is called again after each data transfer rate | |
1306 | * change. | |
1307 | * | |
1308 | * srt: 1000 to 16000 in microseconds | |
1309 | * hut: 16 to 240 milliseconds | |
1310 | * hlt: 2 to 254 milliseconds | |
1311 | * | |
1312 | * These values are rounded up to the next highest available delay time. | |
1313 | */ | |
1314 | static void fdc_specify(void) | |
1315 | { | |
06f748c4 JJ |
1316 | unsigned char spec1; |
1317 | unsigned char spec2; | |
1318 | unsigned long srt; | |
1319 | unsigned long hlt; | |
1320 | unsigned long hut; | |
1da177e4 LT |
1321 | unsigned long dtr = NOMINAL_DTR; |
1322 | unsigned long scale_dtr = NOMINAL_DTR; | |
1323 | int hlt_max_code = 0x7f; | |
1324 | int hut_max_code = 0xf; | |
1325 | ||
1326 | if (FDCS->need_configure && FDCS->version >= FDC_82072A) { | |
1327 | fdc_configure(); | |
1328 | FDCS->need_configure = 0; | |
1da177e4 LT |
1329 | } |
1330 | ||
1331 | switch (raw_cmd->rate & 0x03) { | |
1332 | case 3: | |
1333 | dtr = 1000; | |
1334 | break; | |
1335 | case 1: | |
1336 | dtr = 300; | |
1337 | if (FDCS->version >= FDC_82078) { | |
1338 | /* chose the default rate table, not the one | |
1339 | * where 1 = 2 Mbps */ | |
1340 | output_byte(FD_DRIVESPEC); | |
1341 | if (need_more_output() == MORE_OUTPUT) { | |
1342 | output_byte(UNIT(current_drive)); | |
1343 | output_byte(0xc0); | |
1344 | } | |
1345 | } | |
1346 | break; | |
1347 | case 2: | |
1348 | dtr = 250; | |
1349 | break; | |
1350 | } | |
1351 | ||
1352 | if (FDCS->version >= FDC_82072) { | |
1353 | scale_dtr = dtr; | |
1354 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1355 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1356 | } | |
1357 | ||
1358 | /* Convert step rate from microseconds to milliseconds and 4 bits */ | |
1359 | srt = 16 - (DP->srt * scale_dtr / 1000 + NOMINAL_DTR - 1) / NOMINAL_DTR; | |
1360 | if (slow_floppy) { | |
1361 | srt = srt / 4; | |
1362 | } | |
1363 | SUPBOUND(srt, 0xf); | |
1364 | INFBOUND(srt, 0); | |
1365 | ||
1366 | hlt = (DP->hlt * scale_dtr / 2 + NOMINAL_DTR - 1) / NOMINAL_DTR; | |
1367 | if (hlt < 0x01) | |
1368 | hlt = 0x01; | |
1369 | else if (hlt > 0x7f) | |
1370 | hlt = hlt_max_code; | |
1371 | ||
1372 | hut = (DP->hut * scale_dtr / 16 + NOMINAL_DTR - 1) / NOMINAL_DTR; | |
1373 | if (hut < 0x1) | |
1374 | hut = 0x1; | |
1375 | else if (hut > 0xf) | |
1376 | hut = hut_max_code; | |
1377 | ||
1378 | spec1 = (srt << 4) | hut; | |
1379 | spec2 = (hlt << 1) | (use_virtual_dma & 1); | |
1380 | ||
1381 | /* If these parameters did not change, just return with success */ | |
1382 | if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { | |
1383 | /* Go ahead and set spec1 and spec2 */ | |
1384 | output_byte(FD_SPECIFY); | |
1385 | output_byte(FDCS->spec1 = spec1); | |
1386 | output_byte(FDCS->spec2 = spec2); | |
1387 | } | |
1388 | } /* fdc_specify */ | |
1389 | ||
1390 | /* Set the FDC's data transfer rate on behalf of the specified drive. | |
1391 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue | |
1392 | * of the specify command (i.e. using the fdc_specify function). | |
1393 | */ | |
1394 | static int fdc_dtr(void) | |
1395 | { | |
1396 | /* If data rate not already set to desired value, set it. */ | |
1397 | if ((raw_cmd->rate & 3) == FDCS->dtr) | |
1398 | return 0; | |
1399 | ||
1400 | /* Set dtr */ | |
1401 | fd_outb(raw_cmd->rate & 3, FD_DCR); | |
1402 | ||
1403 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) | |
1404 | * need a stabilization period of several milliseconds to be | |
1405 | * enforced after data rate changes before R/W operations. | |
1406 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) | |
1407 | */ | |
1408 | FDCS->dtr = raw_cmd->rate & 3; | |
1409 | return (fd_wait_for_completion(jiffies + 2UL * HZ / 100, | |
1410 | (timeout_fn) floppy_ready)); | |
1411 | } /* fdc_dtr */ | |
1412 | ||
1413 | static void tell_sector(void) | |
1414 | { | |
1415 | printk(": track %d, head %d, sector %d, size %d", | |
1416 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); | |
1417 | } /* tell_sector */ | |
1418 | ||
1419 | /* | |
1420 | * OK, this error interpreting routine is called after a | |
1421 | * DMA read/write has succeeded | |
1422 | * or failed, so we check the results, and copy any buffers. | |
1423 | * hhb: Added better error reporting. | |
1424 | * ak: Made this into a separate routine. | |
1425 | */ | |
1426 | static int interpret_errors(void) | |
1427 | { | |
1428 | char bad; | |
1429 | ||
1430 | if (inr != 7) { | |
1431 | DPRINT("-- FDC reply error"); | |
1432 | FDCS->reset = 1; | |
1433 | return 1; | |
1434 | } | |
1435 | ||
1436 | /* check IC to find cause of interrupt */ | |
1437 | switch (ST0 & ST0_INTR) { | |
1438 | case 0x40: /* error occurred during command execution */ | |
1439 | if (ST1 & ST1_EOC) | |
1440 | return 0; /* occurs with pseudo-DMA */ | |
1441 | bad = 1; | |
1442 | if (ST1 & ST1_WP) { | |
1443 | DPRINT("Drive is write protected\n"); | |
1444 | CLEARF(FD_DISK_WRITABLE); | |
1445 | cont->done(0); | |
1446 | bad = 2; | |
1447 | } else if (ST1 & ST1_ND) { | |
1448 | SETF(FD_NEED_TWADDLE); | |
1449 | } else if (ST1 & ST1_OR) { | |
1450 | if (DP->flags & FTD_MSG) | |
1451 | DPRINT("Over/Underrun - retrying\n"); | |
1452 | bad = 0; | |
1453 | } else if (*errors >= DP->max_errors.reporting) { | |
1454 | DPRINT(""); | |
1455 | if (ST0 & ST0_ECE) { | |
1456 | printk("Recalibrate failed!"); | |
1457 | } else if (ST2 & ST2_CRC) { | |
1458 | printk("data CRC error"); | |
1459 | tell_sector(); | |
1460 | } else if (ST1 & ST1_CRC) { | |
1461 | printk("CRC error"); | |
1462 | tell_sector(); | |
1463 | } else if ((ST1 & (ST1_MAM | ST1_ND)) | |
1464 | || (ST2 & ST2_MAM)) { | |
1465 | if (!probing) { | |
1466 | printk("sector not found"); | |
1467 | tell_sector(); | |
1468 | } else | |
1469 | printk("probe failed..."); | |
1470 | } else if (ST2 & ST2_WC) { /* seek error */ | |
1471 | printk("wrong cylinder"); | |
1472 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ | |
1473 | printk("bad cylinder"); | |
1474 | } else { | |
1475 | printk | |
1476 | ("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", | |
1477 | ST0, ST1, ST2); | |
1478 | tell_sector(); | |
1479 | } | |
1480 | printk("\n"); | |
1da177e4 LT |
1481 | } |
1482 | if (ST2 & ST2_WC || ST2 & ST2_BC) | |
1483 | /* wrong cylinder => recal */ | |
1484 | DRS->track = NEED_2_RECAL; | |
1485 | return bad; | |
1486 | case 0x80: /* invalid command given */ | |
1487 | DPRINT("Invalid FDC command given!\n"); | |
1488 | cont->done(0); | |
1489 | return 2; | |
1490 | case 0xc0: | |
1491 | DPRINT("Abnormal termination caused by polling\n"); | |
1492 | cont->error(); | |
1493 | return 2; | |
1494 | default: /* (0) Normal command termination */ | |
1495 | return 0; | |
1496 | } | |
1497 | } | |
1498 | ||
1499 | /* | |
1500 | * This routine is called when everything should be correctly set up | |
1501 | * for the transfer (i.e. floppy motor is on, the correct floppy is | |
1502 | * selected, and the head is sitting on the right track). | |
1503 | */ | |
1504 | static void setup_rw_floppy(void) | |
1505 | { | |
06f748c4 JJ |
1506 | int i; |
1507 | int r; | |
1508 | int flags; | |
1509 | int dflags; | |
1da177e4 LT |
1510 | unsigned long ready_date; |
1511 | timeout_fn function; | |
1512 | ||
1513 | flags = raw_cmd->flags; | |
1514 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) | |
1515 | flags |= FD_RAW_INTR; | |
1516 | ||
1517 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { | |
1518 | ready_date = DRS->spinup_date + DP->spinup; | |
1519 | /* If spinup will take a long time, rerun scandrives | |
1520 | * again just before spinup completion. Beware that | |
1521 | * after scandrives, we must again wait for selection. | |
1522 | */ | |
50297cbf | 1523 | if (time_after(ready_date, jiffies + DP->select_delay)) { |
1da177e4 LT |
1524 | ready_date -= DP->select_delay; |
1525 | function = (timeout_fn) floppy_start; | |
1526 | } else | |
1527 | function = (timeout_fn) setup_rw_floppy; | |
1528 | ||
1529 | /* wait until the floppy is spinning fast enough */ | |
1530 | if (fd_wait_for_completion(ready_date, function)) | |
1531 | return; | |
1532 | } | |
1533 | dflags = DRS->flags; | |
1534 | ||
1535 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) | |
1536 | setup_DMA(); | |
1537 | ||
1538 | if (flags & FD_RAW_INTR) | |
1539 | do_floppy = main_command_interrupt; | |
1540 | ||
1541 | r = 0; | |
1542 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1543 | r |= output_byte(raw_cmd->cmd[i]); | |
1544 | ||
1545 | debugt("rw_command: "); | |
1546 | ||
1547 | if (r) { | |
1548 | cont->error(); | |
1549 | reset_fdc(); | |
1550 | return; | |
1551 | } | |
1552 | ||
1553 | if (!(flags & FD_RAW_INTR)) { | |
1554 | inr = result(); | |
1555 | cont->interrupt(); | |
1556 | } else if (flags & FD_RAW_NEED_DISK) | |
1557 | fd_watchdog(); | |
1558 | } | |
1559 | ||
1560 | static int blind_seek; | |
1561 | ||
1562 | /* | |
1563 | * This is the routine called after every seek (or recalibrate) interrupt | |
1564 | * from the floppy controller. | |
1565 | */ | |
1566 | static void seek_interrupt(void) | |
1567 | { | |
1568 | debugt("seek interrupt:"); | |
1569 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { | |
1570 | DPRINT("seek failed\n"); | |
1571 | DRS->track = NEED_2_RECAL; | |
1572 | cont->error(); | |
1573 | cont->redo(); | |
1574 | return; | |
1575 | } | |
1576 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { | |
1577 | #ifdef DCL_DEBUG | |
1578 | if (DP->flags & FD_DEBUG) { | |
1579 | DPRINT | |
1580 | ("clearing NEWCHANGE flag because of effective seek\n"); | |
1581 | DPRINT("jiffies=%lu\n", jiffies); | |
1582 | } | |
1583 | #endif | |
1584 | CLEARF(FD_DISK_NEWCHANGE); /* effective seek */ | |
1585 | DRS->select_date = jiffies; | |
1586 | } | |
1587 | DRS->track = ST1; | |
1588 | floppy_ready(); | |
1589 | } | |
1590 | ||
1591 | static void check_wp(void) | |
1592 | { | |
1593 | if (TESTF(FD_VERIFY)) { | |
1594 | /* check write protection */ | |
1595 | output_byte(FD_GETSTATUS); | |
1596 | output_byte(UNIT(current_drive)); | |
1597 | if (result() != 1) { | |
1598 | FDCS->reset = 1; | |
1599 | return; | |
1600 | } | |
1601 | CLEARF(FD_VERIFY); | |
1602 | CLEARF(FD_NEED_TWADDLE); | |
1603 | #ifdef DCL_DEBUG | |
1604 | if (DP->flags & FD_DEBUG) { | |
1605 | DPRINT("checking whether disk is write protected\n"); | |
1606 | DPRINT("wp=%x\n", ST3 & 0x40); | |
1607 | } | |
1608 | #endif | |
1609 | if (!(ST3 & 0x40)) | |
1610 | SETF(FD_DISK_WRITABLE); | |
1611 | else | |
1612 | CLEARF(FD_DISK_WRITABLE); | |
1613 | } | |
1614 | } | |
1615 | ||
1616 | static void seek_floppy(void) | |
1617 | { | |
1618 | int track; | |
1619 | ||
1620 | blind_seek = 0; | |
1621 | ||
1622 | #ifdef DCL_DEBUG | |
1623 | if (DP->flags & FD_DEBUG) { | |
1624 | DPRINT("calling disk change from seek\n"); | |
1625 | } | |
1626 | #endif | |
1627 | ||
1628 | if (!TESTF(FD_DISK_NEWCHANGE) && | |
1629 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { | |
1630 | /* the media changed flag should be cleared after the seek. | |
1631 | * If it isn't, this means that there is really no disk in | |
1632 | * the drive. | |
1633 | */ | |
1634 | SETF(FD_DISK_CHANGED); | |
1635 | cont->done(0); | |
1636 | cont->redo(); | |
1637 | return; | |
1638 | } | |
1639 | if (DRS->track <= NEED_1_RECAL) { | |
1640 | recalibrate_floppy(); | |
1641 | return; | |
1642 | } else if (TESTF(FD_DISK_NEWCHANGE) && | |
1643 | (raw_cmd->flags & FD_RAW_NEED_DISK) && | |
1644 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { | |
1645 | /* we seek to clear the media-changed condition. Does anybody | |
1646 | * know a more elegant way, which works on all drives? */ | |
1647 | if (raw_cmd->track) | |
1648 | track = raw_cmd->track - 1; | |
1649 | else { | |
1650 | if (DP->flags & FD_SILENT_DCL_CLEAR) { | |
1651 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); | |
1652 | blind_seek = 1; | |
1653 | raw_cmd->flags |= FD_RAW_NEED_SEEK; | |
1654 | } | |
1655 | track = 1; | |
1656 | } | |
1657 | } else { | |
1658 | check_wp(); | |
1659 | if (raw_cmd->track != DRS->track && | |
1660 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) | |
1661 | track = raw_cmd->track; | |
1662 | else { | |
1663 | setup_rw_floppy(); | |
1664 | return; | |
1665 | } | |
1666 | } | |
1667 | ||
1668 | do_floppy = seek_interrupt; | |
1669 | output_byte(FD_SEEK); | |
1670 | output_byte(UNIT(current_drive)); | |
1671 | LAST_OUT(track); | |
1672 | debugt("seek command:"); | |
1673 | } | |
1674 | ||
1675 | static void recal_interrupt(void) | |
1676 | { | |
1677 | debugt("recal interrupt:"); | |
1678 | if (inr != 2) | |
1679 | FDCS->reset = 1; | |
1680 | else if (ST0 & ST0_ECE) { | |
1681 | switch (DRS->track) { | |
1682 | case NEED_1_RECAL: | |
1683 | debugt("recal interrupt need 1 recal:"); | |
1684 | /* after a second recalibrate, we still haven't | |
1685 | * reached track 0. Probably no drive. Raise an | |
1686 | * error, as failing immediately might upset | |
1687 | * computers possessed by the Devil :-) */ | |
1688 | cont->error(); | |
1689 | cont->redo(); | |
1690 | return; | |
1691 | case NEED_2_RECAL: | |
1692 | debugt("recal interrupt need 2 recal:"); | |
1693 | /* If we already did a recalibrate, | |
1694 | * and we are not at track 0, this | |
1695 | * means we have moved. (The only way | |
1696 | * not to move at recalibration is to | |
1697 | * be already at track 0.) Clear the | |
1698 | * new change flag */ | |
1699 | #ifdef DCL_DEBUG | |
1700 | if (DP->flags & FD_DEBUG) { | |
1701 | DPRINT | |
1702 | ("clearing NEWCHANGE flag because of second recalibrate\n"); | |
1703 | } | |
1704 | #endif | |
1705 | ||
1706 | CLEARF(FD_DISK_NEWCHANGE); | |
1707 | DRS->select_date = jiffies; | |
1708 | /* fall through */ | |
1709 | default: | |
1710 | debugt("recal interrupt default:"); | |
1711 | /* Recalibrate moves the head by at | |
1712 | * most 80 steps. If after one | |
1713 | * recalibrate we don't have reached | |
1714 | * track 0, this might mean that we | |
1715 | * started beyond track 80. Try | |
1716 | * again. */ | |
1717 | DRS->track = NEED_1_RECAL; | |
1718 | break; | |
1719 | } | |
1720 | } else | |
1721 | DRS->track = ST1; | |
1722 | floppy_ready(); | |
1723 | } | |
1724 | ||
1725 | static void print_result(char *message, int inr) | |
1726 | { | |
1727 | int i; | |
1728 | ||
1729 | DPRINT("%s ", message); | |
1730 | if (inr >= 0) | |
1731 | for (i = 0; i < inr; i++) | |
1732 | printk("repl[%d]=%x ", i, reply_buffer[i]); | |
1733 | printk("\n"); | |
1734 | } | |
1735 | ||
1736 | /* interrupt handler. Note that this can be called externally on the Sparc */ | |
7d12e780 | 1737 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1da177e4 | 1738 | { |
1da177e4 LT |
1739 | int do_print; |
1740 | unsigned long f; | |
06f748c4 | 1741 | void (*handler)(void) = do_floppy; |
1da177e4 LT |
1742 | |
1743 | lasthandler = handler; | |
1744 | interruptjiffies = jiffies; | |
1745 | ||
1746 | f = claim_dma_lock(); | |
1747 | fd_disable_dma(); | |
1748 | release_dma_lock(f); | |
1749 | ||
1750 | floppy_enable_hlt(); | |
1751 | do_floppy = NULL; | |
1752 | if (fdc >= N_FDC || FDCS->address == -1) { | |
1753 | /* we don't even know which FDC is the culprit */ | |
1754 | printk("DOR0=%x\n", fdc_state[0].dor); | |
1755 | printk("floppy interrupt on bizarre fdc %d\n", fdc); | |
1756 | printk("handler=%p\n", handler); | |
1757 | is_alive("bizarre fdc"); | |
1758 | return IRQ_NONE; | |
1759 | } | |
1760 | ||
1761 | FDCS->reset = 0; | |
1762 | /* We have to clear the reset flag here, because apparently on boxes | |
1763 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to | |
1764 | * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the | |
1765 | * emission of the SENSEI's. | |
1766 | * It is OK to emit floppy commands because we are in an interrupt | |
1767 | * handler here, and thus we have to fear no interference of other | |
1768 | * activity. | |
1769 | */ | |
1770 | ||
1771 | do_print = !handler && print_unex && !initialising; | |
1772 | ||
1773 | inr = result(); | |
1774 | if (do_print) | |
1775 | print_result("unexpected interrupt", inr); | |
1776 | if (inr == 0) { | |
1777 | int max_sensei = 4; | |
1778 | do { | |
1779 | output_byte(FD_SENSEI); | |
1780 | inr = result(); | |
1781 | if (do_print) | |
1782 | print_result("sensei", inr); | |
1783 | max_sensei--; | |
1784 | } while ((ST0 & 0x83) != UNIT(current_drive) && inr == 2 | |
1785 | && max_sensei); | |
1786 | } | |
1787 | if (!handler) { | |
1788 | FDCS->reset = 1; | |
1789 | return IRQ_NONE; | |
1790 | } | |
1791 | schedule_bh(handler); | |
1792 | is_alive("normal interrupt end"); | |
1793 | ||
1794 | /* FIXME! Was it really for us? */ | |
1795 | return IRQ_HANDLED; | |
1796 | } | |
1797 | ||
1798 | static void recalibrate_floppy(void) | |
1799 | { | |
1800 | debugt("recalibrate floppy:"); | |
1801 | do_floppy = recal_interrupt; | |
1802 | output_byte(FD_RECALIBRATE); | |
1803 | LAST_OUT(UNIT(current_drive)); | |
1804 | } | |
1805 | ||
1806 | /* | |
1807 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. | |
1808 | */ | |
1809 | static void reset_interrupt(void) | |
1810 | { | |
1811 | debugt("reset interrupt:"); | |
1812 | result(); /* get the status ready for set_fdc */ | |
1813 | if (FDCS->reset) { | |
1814 | printk("reset set in interrupt, calling %p\n", cont->error); | |
1815 | cont->error(); /* a reset just after a reset. BAD! */ | |
1816 | } | |
1817 | cont->redo(); | |
1818 | } | |
1819 | ||
1820 | /* | |
1821 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), | |
1822 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) | |
1823 | */ | |
1824 | static void reset_fdc(void) | |
1825 | { | |
1826 | unsigned long flags; | |
1827 | ||
1828 | do_floppy = reset_interrupt; | |
1829 | FDCS->reset = 0; | |
1830 | reset_fdc_info(0); | |
1831 | ||
1832 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ | |
1833 | /* Irrelevant for systems with true DMA (i386). */ | |
1834 | ||
1835 | flags = claim_dma_lock(); | |
1836 | fd_disable_dma(); | |
1837 | release_dma_lock(flags); | |
1838 | ||
1839 | if (FDCS->version >= FDC_82072A) | |
1840 | fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); | |
1841 | else { | |
1842 | fd_outb(FDCS->dor & ~0x04, FD_DOR); | |
1843 | udelay(FD_RESET_DELAY); | |
1844 | fd_outb(FDCS->dor, FD_DOR); | |
1845 | } | |
1846 | } | |
1847 | ||
1848 | static void show_floppy(void) | |
1849 | { | |
1850 | int i; | |
1851 | ||
1852 | printk("\n"); | |
1853 | printk("floppy driver state\n"); | |
1854 | printk("-------------------\n"); | |
1855 | printk("now=%lu last interrupt=%lu diff=%lu last called handler=%p\n", | |
1856 | jiffies, interruptjiffies, jiffies - interruptjiffies, | |
1857 | lasthandler); | |
1858 | ||
1859 | #ifdef FLOPPY_SANITY_CHECK | |
1860 | printk("timeout_message=%s\n", timeout_message); | |
1861 | printk("last output bytes:\n"); | |
1862 | for (i = 0; i < OLOGSIZE; i++) | |
1863 | printk("%2x %2x %lu\n", | |
1864 | output_log[(i + output_log_pos) % OLOGSIZE].data, | |
1865 | output_log[(i + output_log_pos) % OLOGSIZE].status, | |
1866 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); | |
1867 | printk("last result at %lu\n", resultjiffies); | |
1868 | printk("last redo_fd_request at %lu\n", lastredo); | |
1869 | for (i = 0; i < resultsize; i++) { | |
1870 | printk("%2x ", reply_buffer[i]); | |
1871 | } | |
1872 | printk("\n"); | |
1873 | #endif | |
1874 | ||
1875 | printk("status=%x\n", fd_inb(FD_STATUS)); | |
1876 | printk("fdc_busy=%lu\n", fdc_busy); | |
1877 | if (do_floppy) | |
1878 | printk("do_floppy=%p\n", do_floppy); | |
365970a1 | 1879 | if (work_pending(&floppy_work)) |
1da177e4 LT |
1880 | printk("floppy_work.func=%p\n", floppy_work.func); |
1881 | if (timer_pending(&fd_timer)) | |
1882 | printk("fd_timer.function=%p\n", fd_timer.function); | |
1883 | if (timer_pending(&fd_timeout)) { | |
1884 | printk("timer_function=%p\n", fd_timeout.function); | |
1885 | printk("expires=%lu\n", fd_timeout.expires - jiffies); | |
1886 | printk("now=%lu\n", jiffies); | |
1887 | } | |
1888 | printk("cont=%p\n", cont); | |
1889 | printk("current_req=%p\n", current_req); | |
1890 | printk("command_status=%d\n", command_status); | |
1891 | printk("\n"); | |
1892 | } | |
1893 | ||
1894 | static void floppy_shutdown(unsigned long data) | |
1895 | { | |
1896 | unsigned long flags; | |
1897 | ||
1898 | if (!initialising) | |
1899 | show_floppy(); | |
1900 | cancel_activity(); | |
1901 | ||
1902 | floppy_enable_hlt(); | |
1903 | ||
1904 | flags = claim_dma_lock(); | |
1905 | fd_disable_dma(); | |
1906 | release_dma_lock(flags); | |
1907 | ||
1908 | /* avoid dma going to a random drive after shutdown */ | |
1909 | ||
1910 | if (!initialising) | |
1911 | DPRINT("floppy timeout called\n"); | |
1912 | FDCS->reset = 1; | |
1913 | if (cont) { | |
1914 | cont->done(0); | |
1915 | cont->redo(); /* this will recall reset when needed */ | |
1916 | } else { | |
1917 | printk("no cont in shutdown!\n"); | |
1918 | process_fd_request(); | |
1919 | } | |
1920 | is_alive("floppy shutdown"); | |
1921 | } | |
1922 | ||
1da177e4 | 1923 | /* start motor, check media-changed condition and write protection */ |
06f748c4 | 1924 | static int start_motor(void (*function)(void)) |
1da177e4 | 1925 | { |
06f748c4 JJ |
1926 | int mask; |
1927 | int data; | |
1da177e4 LT |
1928 | |
1929 | mask = 0xfc; | |
1930 | data = UNIT(current_drive); | |
1931 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { | |
1932 | if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { | |
1933 | set_debugt(); | |
1934 | /* no read since this drive is running */ | |
1935 | DRS->first_read_date = 0; | |
1936 | /* note motor start time if motor is not yet running */ | |
1937 | DRS->spinup_date = jiffies; | |
1938 | data |= (0x10 << UNIT(current_drive)); | |
1939 | } | |
1940 | } else if (FDCS->dor & (0x10 << UNIT(current_drive))) | |
1941 | mask &= ~(0x10 << UNIT(current_drive)); | |
1942 | ||
1943 | /* starts motor and selects floppy */ | |
1944 | del_timer(motor_off_timer + current_drive); | |
1945 | set_dor(fdc, mask, data); | |
1946 | ||
1947 | /* wait_for_completion also schedules reset if needed. */ | |
1948 | return (fd_wait_for_completion(DRS->select_date + DP->select_delay, | |
1949 | (timeout_fn) function)); | |
1950 | } | |
1951 | ||
1952 | static void floppy_ready(void) | |
1953 | { | |
1954 | CHECK_RESET; | |
1955 | if (start_motor(floppy_ready)) | |
1956 | return; | |
1957 | if (fdc_dtr()) | |
1958 | return; | |
1959 | ||
1960 | #ifdef DCL_DEBUG | |
1961 | if (DP->flags & FD_DEBUG) { | |
1962 | DPRINT("calling disk change from floppy_ready\n"); | |
1963 | } | |
1964 | #endif | |
1965 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && | |
1966 | disk_change(current_drive) && !DP->select_delay) | |
1967 | twaddle(); /* this clears the dcl on certain drive/controller | |
1968 | * combinations */ | |
1969 | ||
1970 | #ifdef fd_chose_dma_mode | |
1971 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { | |
1972 | unsigned long flags = claim_dma_lock(); | |
1973 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); | |
1974 | release_dma_lock(flags); | |
1975 | } | |
1976 | #endif | |
1977 | ||
1978 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { | |
1979 | perpendicular_mode(); | |
1980 | fdc_specify(); /* must be done here because of hut, hlt ... */ | |
1981 | seek_floppy(); | |
1982 | } else { | |
1983 | if ((raw_cmd->flags & FD_RAW_READ) || | |
1984 | (raw_cmd->flags & FD_RAW_WRITE)) | |
1985 | fdc_specify(); | |
1986 | setup_rw_floppy(); | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | static void floppy_start(void) | |
1991 | { | |
1992 | reschedule_timeout(current_reqD, "floppy start", 0); | |
1993 | ||
1994 | scandrives(); | |
1995 | #ifdef DCL_DEBUG | |
1996 | if (DP->flags & FD_DEBUG) { | |
1997 | DPRINT("setting NEWCHANGE in floppy_start\n"); | |
1998 | } | |
1999 | #endif | |
2000 | SETF(FD_DISK_NEWCHANGE); | |
2001 | floppy_ready(); | |
2002 | } | |
2003 | ||
2004 | /* | |
2005 | * ======================================================================== | |
2006 | * here ends the bottom half. Exported routines are: | |
2007 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, | |
2008 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. | |
2009 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt | |
2010 | * and set_dor. | |
2011 | * ======================================================================== | |
2012 | */ | |
2013 | /* | |
2014 | * General purpose continuations. | |
2015 | * ============================== | |
2016 | */ | |
2017 | ||
2018 | static void do_wakeup(void) | |
2019 | { | |
2020 | reschedule_timeout(MAXTIMEOUT, "do wakeup", 0); | |
2021 | cont = NULL; | |
2022 | command_status += 2; | |
2023 | wake_up(&command_done); | |
2024 | } | |
2025 | ||
2026 | static struct cont_t wakeup_cont = { | |
2027 | .interrupt = empty, | |
2028 | .redo = do_wakeup, | |
2029 | .error = empty, | |
06f748c4 | 2030 | .done = (done_f)empty |
1da177e4 LT |
2031 | }; |
2032 | ||
2033 | static struct cont_t intr_cont = { | |
2034 | .interrupt = empty, | |
2035 | .redo = process_fd_request, | |
2036 | .error = empty, | |
06f748c4 | 2037 | .done = (done_f)empty |
1da177e4 LT |
2038 | }; |
2039 | ||
06f748c4 | 2040 | static int wait_til_done(void (*handler)(void), int interruptible) |
1da177e4 LT |
2041 | { |
2042 | int ret; | |
2043 | ||
2044 | schedule_bh(handler); | |
2045 | ||
2046 | if (command_status < 2 && NO_SIGNAL) { | |
2047 | DECLARE_WAITQUEUE(wait, current); | |
2048 | ||
2049 | add_wait_queue(&command_done, &wait); | |
2050 | for (;;) { | |
2051 | set_current_state(interruptible ? | |
2052 | TASK_INTERRUPTIBLE : | |
2053 | TASK_UNINTERRUPTIBLE); | |
2054 | ||
2055 | if (command_status >= 2 || !NO_SIGNAL) | |
2056 | break; | |
2057 | ||
2058 | is_alive("wait_til_done"); | |
1da177e4 LT |
2059 | schedule(); |
2060 | } | |
2061 | ||
2062 | set_current_state(TASK_RUNNING); | |
2063 | remove_wait_queue(&command_done, &wait); | |
2064 | } | |
2065 | ||
2066 | if (command_status < 2) { | |
2067 | cancel_activity(); | |
2068 | cont = &intr_cont; | |
2069 | reset_fdc(); | |
2070 | return -EINTR; | |
2071 | } | |
2072 | ||
2073 | if (FDCS->reset) | |
2074 | command_status = FD_COMMAND_ERROR; | |
2075 | if (command_status == FD_COMMAND_OKAY) | |
2076 | ret = 0; | |
2077 | else | |
2078 | ret = -EIO; | |
2079 | command_status = FD_COMMAND_NONE; | |
2080 | return ret; | |
2081 | } | |
2082 | ||
2083 | static void generic_done(int result) | |
2084 | { | |
2085 | command_status = result; | |
2086 | cont = &wakeup_cont; | |
2087 | } | |
2088 | ||
2089 | static void generic_success(void) | |
2090 | { | |
2091 | cont->done(1); | |
2092 | } | |
2093 | ||
2094 | static void generic_failure(void) | |
2095 | { | |
2096 | cont->done(0); | |
2097 | } | |
2098 | ||
2099 | static void success_and_wakeup(void) | |
2100 | { | |
2101 | generic_success(); | |
2102 | cont->redo(); | |
2103 | } | |
2104 | ||
2105 | /* | |
2106 | * formatting and rw support. | |
2107 | * ========================== | |
2108 | */ | |
2109 | ||
2110 | static int next_valid_format(void) | |
2111 | { | |
2112 | int probed_format; | |
2113 | ||
2114 | probed_format = DRS->probed_format; | |
2115 | while (1) { | |
2116 | if (probed_format >= 8 || !DP->autodetect[probed_format]) { | |
2117 | DRS->probed_format = 0; | |
2118 | return 1; | |
2119 | } | |
2120 | if (floppy_type[DP->autodetect[probed_format]].sect) { | |
2121 | DRS->probed_format = probed_format; | |
2122 | return 0; | |
2123 | } | |
2124 | probed_format++; | |
2125 | } | |
2126 | } | |
2127 | ||
2128 | static void bad_flp_intr(void) | |
2129 | { | |
2130 | int err_count; | |
2131 | ||
2132 | if (probing) { | |
2133 | DRS->probed_format++; | |
2134 | if (!next_valid_format()) | |
2135 | return; | |
2136 | } | |
2137 | err_count = ++(*errors); | |
2138 | INFBOUND(DRWE->badness, err_count); | |
2139 | if (err_count > DP->max_errors.abort) | |
2140 | cont->done(0); | |
2141 | if (err_count > DP->max_errors.reset) | |
2142 | FDCS->reset = 1; | |
2143 | else if (err_count > DP->max_errors.recal) | |
2144 | DRS->track = NEED_2_RECAL; | |
2145 | } | |
2146 | ||
2147 | static void set_floppy(int drive) | |
2148 | { | |
2149 | int type = ITYPE(UDRS->fd_device); | |
06f748c4 | 2150 | |
1da177e4 LT |
2151 | if (type) |
2152 | _floppy = floppy_type + type; | |
2153 | else | |
2154 | _floppy = current_type[drive]; | |
2155 | } | |
2156 | ||
2157 | /* | |
2158 | * formatting support. | |
2159 | * =================== | |
2160 | */ | |
2161 | static void format_interrupt(void) | |
2162 | { | |
2163 | switch (interpret_errors()) { | |
2164 | case 1: | |
2165 | cont->error(); | |
2166 | case 2: | |
2167 | break; | |
2168 | case 0: | |
2169 | cont->done(1); | |
2170 | } | |
2171 | cont->redo(); | |
2172 | } | |
2173 | ||
2174 | #define CODE2SIZE (ssize = ((1 << SIZECODE) + 3) >> 2) | |
2175 | #define FM_MODE(x,y) ((y) & ~(((x)->rate & 0x80) >>1)) | |
2176 | #define CT(x) ((x) | 0xc0) | |
2177 | static void setup_format_params(int track) | |
2178 | { | |
06f748c4 JJ |
2179 | int n; |
2180 | int il; | |
2181 | int count; | |
2182 | int head_shift; | |
2183 | int track_shift; | |
1da177e4 LT |
2184 | struct fparm { |
2185 | unsigned char track, head, sect, size; | |
2186 | } *here = (struct fparm *)floppy_track_buffer; | |
1da177e4 LT |
2187 | |
2188 | raw_cmd = &default_raw_cmd; | |
2189 | raw_cmd->track = track; | |
2190 | ||
2191 | raw_cmd->flags = FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | | |
2192 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; | |
2193 | raw_cmd->rate = _floppy->rate & 0x43; | |
2194 | raw_cmd->cmd_count = NR_F; | |
2195 | COMMAND = FM_MODE(_floppy, FD_FORMAT); | |
2196 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); | |
2197 | F_SIZECODE = FD_SIZECODE(_floppy); | |
2198 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; | |
2199 | F_GAP = _floppy->fmt_gap; | |
2200 | F_FILL = FD_FILL_BYTE; | |
2201 | ||
2202 | raw_cmd->kernel_data = floppy_track_buffer; | |
2203 | raw_cmd->length = 4 * F_SECT_PER_TRACK; | |
2204 | ||
2205 | /* allow for about 30ms for data transport per track */ | |
2206 | head_shift = (F_SECT_PER_TRACK + 5) / 6; | |
2207 | ||
2208 | /* a ``cylinder'' is two tracks plus a little stepping time */ | |
2209 | track_shift = 2 * head_shift + 3; | |
2210 | ||
2211 | /* position of logical sector 1 on this track */ | |
2212 | n = (track_shift * format_req.track + head_shift * format_req.head) | |
2213 | % F_SECT_PER_TRACK; | |
2214 | ||
2215 | /* determine interleave */ | |
2216 | il = 1; | |
2217 | if (_floppy->fmt_gap < 0x22) | |
2218 | il++; | |
2219 | ||
2220 | /* initialize field */ | |
2221 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { | |
2222 | here[count].track = format_req.track; | |
2223 | here[count].head = format_req.head; | |
2224 | here[count].sect = 0; | |
2225 | here[count].size = F_SIZECODE; | |
2226 | } | |
2227 | /* place logical sectors */ | |
2228 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { | |
2229 | here[n].sect = count; | |
2230 | n = (n + il) % F_SECT_PER_TRACK; | |
2231 | if (here[n].sect) { /* sector busy, find next free sector */ | |
2232 | ++n; | |
2233 | if (n >= F_SECT_PER_TRACK) { | |
2234 | n -= F_SECT_PER_TRACK; | |
2235 | while (here[n].sect) | |
2236 | ++n; | |
2237 | } | |
2238 | } | |
2239 | } | |
2240 | if (_floppy->stretch & FD_ZEROBASED) { | |
2241 | for (count = 0; count < F_SECT_PER_TRACK; count++) | |
2242 | here[count].sect--; | |
2243 | } | |
2244 | } | |
2245 | ||
2246 | static void redo_format(void) | |
2247 | { | |
2248 | buffer_track = -1; | |
2249 | setup_format_params(format_req.track << STRETCH(_floppy)); | |
2250 | floppy_start(); | |
2251 | debugt("queue format request"); | |
2252 | } | |
2253 | ||
2254 | static struct cont_t format_cont = { | |
2255 | .interrupt = format_interrupt, | |
2256 | .redo = redo_format, | |
2257 | .error = bad_flp_intr, | |
2258 | .done = generic_done | |
2259 | }; | |
2260 | ||
2261 | static int do_format(int drive, struct format_descr *tmp_format_req) | |
2262 | { | |
2263 | int ret; | |
2264 | ||
2265 | LOCK_FDC(drive, 1); | |
2266 | set_floppy(drive); | |
2267 | if (!_floppy || | |
2268 | _floppy->track > DP->tracks || | |
2269 | tmp_format_req->track >= _floppy->track || | |
2270 | tmp_format_req->head >= _floppy->head || | |
2271 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || | |
2272 | !_floppy->fmt_gap) { | |
2273 | process_fd_request(); | |
2274 | return -EINVAL; | |
2275 | } | |
2276 | format_req = *tmp_format_req; | |
2277 | format_errors = 0; | |
2278 | cont = &format_cont; | |
2279 | errors = &format_errors; | |
2280 | IWAIT(redo_format); | |
2281 | process_fd_request(); | |
2282 | return ret; | |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | * Buffer read/write and support | |
2287 | * ============================= | |
2288 | */ | |
2289 | ||
1c5093ba | 2290 | static void floppy_end_request(struct request *req, int error) |
1da177e4 LT |
2291 | { |
2292 | unsigned int nr_sectors = current_count_sectors; | |
1c5093ba | 2293 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
1da177e4 LT |
2294 | |
2295 | /* current_count_sectors can be zero if transfer failed */ | |
1c5093ba | 2296 | if (error) |
1da177e4 | 2297 | nr_sectors = req->current_nr_sectors; |
1c5093ba | 2298 | if (__blk_end_request(req, error, nr_sectors << 9)) |
1da177e4 | 2299 | return; |
1da177e4 LT |
2300 | |
2301 | /* We're done with the request */ | |
1c5093ba | 2302 | floppy_off(drive); |
1da177e4 LT |
2303 | current_req = NULL; |
2304 | } | |
2305 | ||
2306 | /* new request_done. Can handle physical sectors which are smaller than a | |
2307 | * logical buffer */ | |
2308 | static void request_done(int uptodate) | |
2309 | { | |
2310 | struct request_queue *q = floppy_queue; | |
2311 | struct request *req = current_req; | |
2312 | unsigned long flags; | |
2313 | int block; | |
2314 | ||
2315 | probing = 0; | |
2316 | reschedule_timeout(MAXTIMEOUT, "request done %d", uptodate); | |
2317 | ||
2318 | if (!req) { | |
2319 | printk("floppy.c: no request in request_done\n"); | |
2320 | return; | |
2321 | } | |
2322 | ||
2323 | if (uptodate) { | |
2324 | /* maintain values for invalidation on geometry | |
2325 | * change */ | |
2326 | block = current_count_sectors + req->sector; | |
2327 | INFBOUND(DRS->maxblock, block); | |
2328 | if (block > _floppy->sect) | |
2329 | DRS->maxtrack = 1; | |
2330 | ||
2331 | /* unlock chained buffers */ | |
2332 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2333 | floppy_end_request(req, 0); |
1da177e4 LT |
2334 | spin_unlock_irqrestore(q->queue_lock, flags); |
2335 | } else { | |
2336 | if (rq_data_dir(req) == WRITE) { | |
2337 | /* record write error information */ | |
2338 | DRWE->write_errors++; | |
2339 | if (DRWE->write_errors == 1) { | |
2340 | DRWE->first_error_sector = req->sector; | |
2341 | DRWE->first_error_generation = DRS->generation; | |
2342 | } | |
2343 | DRWE->last_error_sector = req->sector; | |
2344 | DRWE->last_error_generation = DRS->generation; | |
2345 | } | |
2346 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2347 | floppy_end_request(req, -EIO); |
1da177e4 LT |
2348 | spin_unlock_irqrestore(q->queue_lock, flags); |
2349 | } | |
2350 | } | |
2351 | ||
2352 | /* Interrupt handler evaluating the result of the r/w operation */ | |
2353 | static void rw_interrupt(void) | |
2354 | { | |
06f748c4 JJ |
2355 | int eoc; |
2356 | int ssize; | |
2357 | int heads; | |
2358 | int nr_sectors; | |
1da177e4 LT |
2359 | |
2360 | if (R_HEAD >= 2) { | |
2361 | /* some Toshiba floppy controllers occasionnally seem to | |
2362 | * return bogus interrupts after read/write operations, which | |
2363 | * can be recognized by a bad head number (>= 2) */ | |
2364 | return; | |
2365 | } | |
2366 | ||
2367 | if (!DRS->first_read_date) | |
2368 | DRS->first_read_date = jiffies; | |
2369 | ||
2370 | nr_sectors = 0; | |
2371 | CODE2SIZE; | |
2372 | ||
2373 | if (ST1 & ST1_EOC) | |
2374 | eoc = 1; | |
2375 | else | |
2376 | eoc = 0; | |
2377 | ||
2378 | if (COMMAND & 0x80) | |
2379 | heads = 2; | |
2380 | else | |
2381 | heads = 1; | |
2382 | ||
2383 | nr_sectors = (((R_TRACK - TRACK) * heads + | |
2384 | R_HEAD - HEAD) * SECT_PER_TRACK + | |
2385 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; | |
2386 | ||
2387 | #ifdef FLOPPY_SANITY_CHECK | |
2388 | if (nr_sectors / ssize > | |
2389 | (in_sector_offset + current_count_sectors + ssize - 1) / ssize) { | |
2390 | DPRINT("long rw: %x instead of %lx\n", | |
2391 | nr_sectors, current_count_sectors); | |
2392 | printk("rs=%d s=%d\n", R_SECTOR, SECTOR); | |
2393 | printk("rh=%d h=%d\n", R_HEAD, HEAD); | |
2394 | printk("rt=%d t=%d\n", R_TRACK, TRACK); | |
2395 | printk("heads=%d eoc=%d\n", heads, eoc); | |
2396 | printk("spt=%d st=%d ss=%d\n", SECT_PER_TRACK, | |
2397 | fsector_t, ssize); | |
2398 | printk("in_sector_offset=%d\n", in_sector_offset); | |
2399 | } | |
2400 | #endif | |
2401 | ||
2402 | nr_sectors -= in_sector_offset; | |
2403 | INFBOUND(nr_sectors, 0); | |
2404 | SUPBOUND(current_count_sectors, nr_sectors); | |
2405 | ||
2406 | switch (interpret_errors()) { | |
2407 | case 2: | |
2408 | cont->redo(); | |
2409 | return; | |
2410 | case 1: | |
2411 | if (!current_count_sectors) { | |
2412 | cont->error(); | |
2413 | cont->redo(); | |
2414 | return; | |
2415 | } | |
2416 | break; | |
2417 | case 0: | |
2418 | if (!current_count_sectors) { | |
2419 | cont->redo(); | |
2420 | return; | |
2421 | } | |
2422 | current_type[current_drive] = _floppy; | |
2423 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2424 | break; | |
2425 | } | |
2426 | ||
2427 | if (probing) { | |
2428 | if (DP->flags & FTD_MSG) | |
2429 | DPRINT("Auto-detected floppy type %s in fd%d\n", | |
2430 | _floppy->name, current_drive); | |
2431 | current_type[current_drive] = _floppy; | |
2432 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2433 | probing = 0; | |
2434 | } | |
2435 | ||
2436 | if (CT(COMMAND) != FD_READ || | |
2437 | raw_cmd->kernel_data == current_req->buffer) { | |
2438 | /* transfer directly from buffer */ | |
2439 | cont->done(1); | |
2440 | } else if (CT(COMMAND) == FD_READ) { | |
2441 | buffer_track = raw_cmd->track; | |
2442 | buffer_drive = current_drive; | |
2443 | INFBOUND(buffer_max, nr_sectors + fsector_t); | |
2444 | } | |
2445 | cont->redo(); | |
2446 | } | |
2447 | ||
2448 | /* Compute maximal contiguous buffer size. */ | |
2449 | static int buffer_chain_size(void) | |
2450 | { | |
1da177e4 | 2451 | struct bio_vec *bv; |
5705f702 N |
2452 | int size; |
2453 | struct req_iterator iter; | |
1da177e4 LT |
2454 | char *base; |
2455 | ||
2456 | base = bio_data(current_req->bio); | |
2457 | size = 0; | |
2458 | ||
5705f702 N |
2459 | rq_for_each_segment(bv, current_req, iter) { |
2460 | if (page_address(bv->bv_page) + bv->bv_offset != base + size) | |
2461 | break; | |
1da177e4 | 2462 | |
5705f702 | 2463 | size += bv->bv_len; |
1da177e4 LT |
2464 | } |
2465 | ||
2466 | return size >> 9; | |
2467 | } | |
2468 | ||
2469 | /* Compute the maximal transfer size */ | |
2470 | static int transfer_size(int ssize, int max_sector, int max_size) | |
2471 | { | |
2472 | SUPBOUND(max_sector, fsector_t + max_size); | |
2473 | ||
2474 | /* alignment */ | |
2475 | max_sector -= (max_sector % _floppy->sect) % ssize; | |
2476 | ||
2477 | /* transfer size, beginning not aligned */ | |
2478 | current_count_sectors = max_sector - fsector_t; | |
2479 | ||
2480 | return max_sector; | |
2481 | } | |
2482 | ||
2483 | /* | |
2484 | * Move data from/to the track buffer to/from the buffer cache. | |
2485 | */ | |
2486 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) | |
2487 | { | |
2488 | int remaining; /* number of transferred 512-byte sectors */ | |
2489 | struct bio_vec *bv; | |
06f748c4 JJ |
2490 | char *buffer; |
2491 | char *dma_buffer; | |
5705f702 N |
2492 | int size; |
2493 | struct req_iterator iter; | |
1da177e4 LT |
2494 | |
2495 | max_sector = transfer_size(ssize, | |
2496 | min(max_sector, max_sector_2), | |
2497 | current_req->nr_sectors); | |
2498 | ||
2499 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && | |
2500 | buffer_max > fsector_t + current_req->nr_sectors) | |
2501 | current_count_sectors = min_t(int, buffer_max - fsector_t, | |
2502 | current_req->nr_sectors); | |
2503 | ||
2504 | remaining = current_count_sectors << 9; | |
2505 | #ifdef FLOPPY_SANITY_CHECK | |
2506 | if ((remaining >> 9) > current_req->nr_sectors && | |
2507 | CT(COMMAND) == FD_WRITE) { | |
2508 | DPRINT("in copy buffer\n"); | |
2509 | printk("current_count_sectors=%ld\n", current_count_sectors); | |
2510 | printk("remaining=%d\n", remaining >> 9); | |
2511 | printk("current_req->nr_sectors=%ld\n", | |
2512 | current_req->nr_sectors); | |
2513 | printk("current_req->current_nr_sectors=%u\n", | |
2514 | current_req->current_nr_sectors); | |
2515 | printk("max_sector=%d\n", max_sector); | |
2516 | printk("ssize=%d\n", ssize); | |
2517 | } | |
2518 | #endif | |
2519 | ||
2520 | buffer_max = max(max_sector, buffer_max); | |
2521 | ||
2522 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); | |
2523 | ||
2524 | size = current_req->current_nr_sectors << 9; | |
2525 | ||
5705f702 N |
2526 | rq_for_each_segment(bv, current_req, iter) { |
2527 | if (!remaining) | |
2528 | break; | |
1da177e4 | 2529 | |
5705f702 N |
2530 | size = bv->bv_len; |
2531 | SUPBOUND(size, remaining); | |
1da177e4 | 2532 | |
5705f702 | 2533 | buffer = page_address(bv->bv_page) + bv->bv_offset; |
1da177e4 | 2534 | #ifdef FLOPPY_SANITY_CHECK |
5705f702 N |
2535 | if (dma_buffer + size > |
2536 | floppy_track_buffer + (max_buffer_sectors << 10) || | |
2537 | dma_buffer < floppy_track_buffer) { | |
2538 | DPRINT("buffer overrun in copy buffer %d\n", | |
2539 | (int)((floppy_track_buffer - | |
2540 | dma_buffer) >> 9)); | |
2541 | printk("fsector_t=%d buffer_min=%d\n", | |
2542 | fsector_t, buffer_min); | |
2543 | printk("current_count_sectors=%ld\n", | |
2544 | current_count_sectors); | |
1da177e4 | 2545 | if (CT(COMMAND) == FD_READ) |
5705f702 N |
2546 | printk("read\n"); |
2547 | if (CT(COMMAND) == FD_WRITE) | |
2548 | printk("write\n"); | |
2549 | break; | |
1da177e4 | 2550 | } |
5705f702 N |
2551 | if (((unsigned long)buffer) % 512) |
2552 | DPRINT("%p buffer not aligned\n", buffer); | |
2553 | #endif | |
2554 | if (CT(COMMAND) == FD_READ) | |
2555 | memcpy(buffer, dma_buffer, size); | |
2556 | else | |
2557 | memcpy(dma_buffer, buffer, size); | |
2558 | ||
2559 | remaining -= size; | |
2560 | dma_buffer += size; | |
1da177e4 LT |
2561 | } |
2562 | #ifdef FLOPPY_SANITY_CHECK | |
2563 | if (remaining) { | |
2564 | if (remaining > 0) | |
2565 | max_sector -= remaining >> 9; | |
2566 | DPRINT("weirdness: remaining %d\n", remaining >> 9); | |
2567 | } | |
2568 | #endif | |
2569 | } | |
2570 | ||
1da177e4 LT |
2571 | /* work around a bug in pseudo DMA |
2572 | * (on some FDCs) pseudo DMA does not stop when the CPU stops | |
2573 | * sending data. Hence we need a different way to signal the | |
2574 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this | |
2575 | * does not work with MT, hence we can only transfer one head at | |
2576 | * a time | |
2577 | */ | |
2578 | static void virtualdmabug_workaround(void) | |
2579 | { | |
06f748c4 JJ |
2580 | int hard_sectors; |
2581 | int end_sector; | |
1da177e4 LT |
2582 | |
2583 | if (CT(COMMAND) == FD_WRITE) { | |
2584 | COMMAND &= ~0x80; /* switch off multiple track mode */ | |
2585 | ||
2586 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); | |
2587 | end_sector = SECTOR + hard_sectors - 1; | |
2588 | #ifdef FLOPPY_SANITY_CHECK | |
2589 | if (end_sector > SECT_PER_TRACK) { | |
2590 | printk("too many sectors %d > %d\n", | |
2591 | end_sector, SECT_PER_TRACK); | |
2592 | return; | |
2593 | } | |
2594 | #endif | |
2595 | SECT_PER_TRACK = end_sector; /* make sure SECT_PER_TRACK points | |
2596 | * to end of transfer */ | |
2597 | } | |
2598 | } | |
2599 | ||
2600 | /* | |
2601 | * Formulate a read/write request. | |
2602 | * this routine decides where to load the data (directly to buffer, or to | |
2603 | * tmp floppy area), how much data to load (the size of the buffer, the whole | |
2604 | * track, or a single sector) | |
2605 | * All floppy_track_buffer handling goes in here. If we ever add track buffer | |
2606 | * allocation on the fly, it should be done here. No other part should need | |
2607 | * modification. | |
2608 | */ | |
2609 | ||
2610 | static int make_raw_rw_request(void) | |
2611 | { | |
2612 | int aligned_sector_t; | |
06f748c4 JJ |
2613 | int max_sector; |
2614 | int max_size; | |
2615 | int tracksize; | |
2616 | int ssize; | |
1da177e4 LT |
2617 | |
2618 | if (max_buffer_sectors == 0) { | |
2619 | printk("VFS: Block I/O scheduled on unopened device\n"); | |
2620 | return 0; | |
2621 | } | |
2622 | ||
2623 | set_fdc((long)current_req->rq_disk->private_data); | |
2624 | ||
2625 | raw_cmd = &default_raw_cmd; | |
2626 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | | |
2627 | FD_RAW_NEED_SEEK; | |
2628 | raw_cmd->cmd_count = NR_RW; | |
2629 | if (rq_data_dir(current_req) == READ) { | |
2630 | raw_cmd->flags |= FD_RAW_READ; | |
2631 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2632 | } else if (rq_data_dir(current_req) == WRITE) { | |
2633 | raw_cmd->flags |= FD_RAW_WRITE; | |
2634 | COMMAND = FM_MODE(_floppy, FD_WRITE); | |
2635 | } else { | |
2636 | DPRINT("make_raw_rw_request: unknown command\n"); | |
2637 | return 0; | |
2638 | } | |
2639 | ||
2640 | max_sector = _floppy->sect * _floppy->head; | |
2641 | ||
2642 | TRACK = (int)current_req->sector / max_sector; | |
2643 | fsector_t = (int)current_req->sector % max_sector; | |
2644 | if (_floppy->track && TRACK >= _floppy->track) { | |
2645 | if (current_req->current_nr_sectors & 1) { | |
2646 | current_count_sectors = 1; | |
2647 | return 1; | |
2648 | } else | |
2649 | return 0; | |
2650 | } | |
2651 | HEAD = fsector_t / _floppy->sect; | |
2652 | ||
2653 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_ZEROBASED)) || | |
2654 | TESTF(FD_NEED_TWADDLE)) && fsector_t < _floppy->sect) | |
2655 | max_sector = _floppy->sect; | |
2656 | ||
2657 | /* 2M disks have phantom sectors on the first track */ | |
2658 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { | |
2659 | max_sector = 2 * _floppy->sect / 3; | |
2660 | if (fsector_t >= max_sector) { | |
2661 | current_count_sectors = | |
2662 | min_t(int, _floppy->sect - fsector_t, | |
2663 | current_req->nr_sectors); | |
2664 | return 1; | |
2665 | } | |
2666 | SIZECODE = 2; | |
2667 | } else | |
2668 | SIZECODE = FD_SIZECODE(_floppy); | |
2669 | raw_cmd->rate = _floppy->rate & 0x43; | |
2670 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) | |
2671 | raw_cmd->rate = 1; | |
2672 | ||
2673 | if (SIZECODE) | |
2674 | SIZECODE2 = 0xff; | |
2675 | else | |
2676 | SIZECODE2 = 0x80; | |
2677 | raw_cmd->track = TRACK << STRETCH(_floppy); | |
2678 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); | |
2679 | GAP = _floppy->gap; | |
2680 | CODE2SIZE; | |
2681 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; | |
2682 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + | |
2683 | ((_floppy->stretch & FD_ZEROBASED) ? 0 : 1); | |
2684 | ||
2685 | /* tracksize describes the size which can be filled up with sectors | |
2686 | * of size ssize. | |
2687 | */ | |
2688 | tracksize = _floppy->sect - _floppy->sect % ssize; | |
2689 | if (tracksize < _floppy->sect) { | |
2690 | SECT_PER_TRACK++; | |
2691 | if (tracksize <= fsector_t % _floppy->sect) | |
2692 | SECTOR--; | |
2693 | ||
2694 | /* if we are beyond tracksize, fill up using smaller sectors */ | |
2695 | while (tracksize <= fsector_t % _floppy->sect) { | |
2696 | while (tracksize + ssize > _floppy->sect) { | |
2697 | SIZECODE--; | |
2698 | ssize >>= 1; | |
2699 | } | |
2700 | SECTOR++; | |
2701 | SECT_PER_TRACK++; | |
2702 | tracksize += ssize; | |
2703 | } | |
2704 | max_sector = HEAD * _floppy->sect + tracksize; | |
2705 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { | |
2706 | max_sector = _floppy->sect; | |
2707 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { | |
2708 | /* for virtual DMA bug workaround */ | |
2709 | max_sector = _floppy->sect; | |
2710 | } | |
2711 | ||
2712 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; | |
2713 | aligned_sector_t = fsector_t - in_sector_offset; | |
2714 | max_size = current_req->nr_sectors; | |
2715 | if ((raw_cmd->track == buffer_track) && | |
2716 | (current_drive == buffer_drive) && | |
2717 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { | |
2718 | /* data already in track buffer */ | |
2719 | if (CT(COMMAND) == FD_READ) { | |
2720 | copy_buffer(1, max_sector, buffer_max); | |
2721 | return 1; | |
2722 | } | |
2723 | } else if (in_sector_offset || current_req->nr_sectors < ssize) { | |
2724 | if (CT(COMMAND) == FD_WRITE) { | |
2725 | if (fsector_t + current_req->nr_sectors > ssize && | |
2726 | fsector_t + current_req->nr_sectors < ssize + ssize) | |
2727 | max_size = ssize + ssize; | |
2728 | else | |
2729 | max_size = ssize; | |
2730 | } | |
2731 | raw_cmd->flags &= ~FD_RAW_WRITE; | |
2732 | raw_cmd->flags |= FD_RAW_READ; | |
2733 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2734 | } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { | |
2735 | unsigned long dma_limit; | |
2736 | int direct, indirect; | |
2737 | ||
2738 | indirect = | |
2739 | transfer_size(ssize, max_sector, | |
2740 | max_buffer_sectors * 2) - fsector_t; | |
2741 | ||
2742 | /* | |
2743 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide | |
2744 | * on a 64 bit machine! | |
2745 | */ | |
2746 | max_size = buffer_chain_size(); | |
2747 | dma_limit = | |
2748 | (MAX_DMA_ADDRESS - | |
2749 | ((unsigned long)current_req->buffer)) >> 9; | |
2750 | if ((unsigned long)max_size > dma_limit) { | |
2751 | max_size = dma_limit; | |
2752 | } | |
2753 | /* 64 kb boundaries */ | |
2754 | if (CROSS_64KB(current_req->buffer, max_size << 9)) | |
2755 | max_size = (K_64 - | |
2756 | ((unsigned long)current_req->buffer) % | |
2757 | K_64) >> 9; | |
2758 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; | |
2759 | /* | |
2760 | * We try to read tracks, but if we get too many errors, we | |
2761 | * go back to reading just one sector at a time. | |
2762 | * | |
2763 | * This means we should be able to read a sector even if there | |
2764 | * are other bad sectors on this track. | |
2765 | */ | |
2766 | if (!direct || | |
2767 | (indirect * 2 > direct * 3 && | |
aee9041c | 2768 | *errors < DP->max_errors.read_track && ((!probing |
1da177e4 LT |
2769 | || (DP->read_track & (1 << DRS->probed_format)))))) { |
2770 | max_size = current_req->nr_sectors; | |
2771 | } else { | |
2772 | raw_cmd->kernel_data = current_req->buffer; | |
2773 | raw_cmd->length = current_count_sectors << 9; | |
2774 | if (raw_cmd->length == 0) { | |
2775 | DPRINT | |
2776 | ("zero dma transfer attempted from make_raw_request\n"); | |
2777 | DPRINT("indirect=%d direct=%d fsector_t=%d", | |
2778 | indirect, direct, fsector_t); | |
2779 | return 0; | |
2780 | } | |
1da177e4 LT |
2781 | virtualdmabug_workaround(); |
2782 | return 2; | |
2783 | } | |
2784 | } | |
2785 | ||
2786 | if (CT(COMMAND) == FD_READ) | |
2787 | max_size = max_sector; /* unbounded */ | |
2788 | ||
2789 | /* claim buffer track if needed */ | |
2790 | if (buffer_track != raw_cmd->track || /* bad track */ | |
2791 | buffer_drive != current_drive || /* bad drive */ | |
2792 | fsector_t > buffer_max || | |
2793 | fsector_t < buffer_min || | |
2794 | ((CT(COMMAND) == FD_READ || | |
2795 | (!in_sector_offset && current_req->nr_sectors >= ssize)) && | |
2796 | max_sector > 2 * max_buffer_sectors + buffer_min && | |
2797 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min) | |
2798 | /* not enough space */ | |
2799 | ) { | |
2800 | buffer_track = -1; | |
2801 | buffer_drive = current_drive; | |
2802 | buffer_max = buffer_min = aligned_sector_t; | |
2803 | } | |
2804 | raw_cmd->kernel_data = floppy_track_buffer + | |
2805 | ((aligned_sector_t - buffer_min) << 9); | |
2806 | ||
2807 | if (CT(COMMAND) == FD_WRITE) { | |
2808 | /* copy write buffer to track buffer. | |
2809 | * if we get here, we know that the write | |
2810 | * is either aligned or the data already in the buffer | |
2811 | * (buffer will be overwritten) */ | |
2812 | #ifdef FLOPPY_SANITY_CHECK | |
2813 | if (in_sector_offset && buffer_track == -1) | |
2814 | DPRINT("internal error offset !=0 on write\n"); | |
2815 | #endif | |
2816 | buffer_track = raw_cmd->track; | |
2817 | buffer_drive = current_drive; | |
2818 | copy_buffer(ssize, max_sector, | |
2819 | 2 * max_buffer_sectors + buffer_min); | |
2820 | } else | |
2821 | transfer_size(ssize, max_sector, | |
2822 | 2 * max_buffer_sectors + buffer_min - | |
2823 | aligned_sector_t); | |
2824 | ||
2825 | /* round up current_count_sectors to get dma xfer size */ | |
2826 | raw_cmd->length = in_sector_offset + current_count_sectors; | |
2827 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; | |
2828 | raw_cmd->length <<= 9; | |
2829 | #ifdef FLOPPY_SANITY_CHECK | |
1da177e4 LT |
2830 | if ((raw_cmd->length < current_count_sectors << 9) || |
2831 | (raw_cmd->kernel_data != current_req->buffer && | |
2832 | CT(COMMAND) == FD_WRITE && | |
2833 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || | |
2834 | aligned_sector_t < buffer_min)) || | |
2835 | raw_cmd->length % (128 << SIZECODE) || | |
2836 | raw_cmd->length <= 0 || current_count_sectors <= 0) { | |
2837 | DPRINT("fractionary current count b=%lx s=%lx\n", | |
2838 | raw_cmd->length, current_count_sectors); | |
2839 | if (raw_cmd->kernel_data != current_req->buffer) | |
2840 | printk("addr=%d, length=%ld\n", | |
2841 | (int)((raw_cmd->kernel_data - | |
2842 | floppy_track_buffer) >> 9), | |
2843 | current_count_sectors); | |
2844 | printk("st=%d ast=%d mse=%d msi=%d\n", | |
2845 | fsector_t, aligned_sector_t, max_sector, max_size); | |
2846 | printk("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); | |
2847 | printk("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", | |
2848 | COMMAND, SECTOR, HEAD, TRACK); | |
2849 | printk("buffer drive=%d\n", buffer_drive); | |
2850 | printk("buffer track=%d\n", buffer_track); | |
2851 | printk("buffer_min=%d\n", buffer_min); | |
2852 | printk("buffer_max=%d\n", buffer_max); | |
2853 | return 0; | |
2854 | } | |
2855 | ||
2856 | if (raw_cmd->kernel_data != current_req->buffer) { | |
2857 | if (raw_cmd->kernel_data < floppy_track_buffer || | |
2858 | current_count_sectors < 0 || | |
2859 | raw_cmd->length < 0 || | |
2860 | raw_cmd->kernel_data + raw_cmd->length > | |
2861 | floppy_track_buffer + (max_buffer_sectors << 10)) { | |
2862 | DPRINT("buffer overrun in schedule dma\n"); | |
2863 | printk("fsector_t=%d buffer_min=%d current_count=%ld\n", | |
2864 | fsector_t, buffer_min, raw_cmd->length >> 9); | |
2865 | printk("current_count_sectors=%ld\n", | |
2866 | current_count_sectors); | |
2867 | if (CT(COMMAND) == FD_READ) | |
2868 | printk("read\n"); | |
2869 | if (CT(COMMAND) == FD_WRITE) | |
2870 | printk("write\n"); | |
2871 | return 0; | |
2872 | } | |
2873 | } else if (raw_cmd->length > current_req->nr_sectors << 9 || | |
2874 | current_count_sectors > current_req->nr_sectors) { | |
2875 | DPRINT("buffer overrun in direct transfer\n"); | |
2876 | return 0; | |
2877 | } else if (raw_cmd->length < current_count_sectors << 9) { | |
2878 | DPRINT("more sectors than bytes\n"); | |
2879 | printk("bytes=%ld\n", raw_cmd->length >> 9); | |
2880 | printk("sectors=%ld\n", current_count_sectors); | |
2881 | } | |
2882 | if (raw_cmd->length == 0) { | |
2883 | DPRINT("zero dma transfer attempted from make_raw_request\n"); | |
2884 | return 0; | |
2885 | } | |
2886 | #endif | |
2887 | ||
2888 | virtualdmabug_workaround(); | |
2889 | return 2; | |
2890 | } | |
2891 | ||
2892 | static void redo_fd_request(void) | |
2893 | { | |
2894 | #define REPEAT {request_done(0); continue; } | |
2895 | int drive; | |
2896 | int tmp; | |
2897 | ||
2898 | lastredo = jiffies; | |
2899 | if (current_drive < N_DRIVE) | |
2900 | floppy_off(current_drive); | |
2901 | ||
2902 | for (;;) { | |
2903 | if (!current_req) { | |
2904 | struct request *req; | |
2905 | ||
2906 | spin_lock_irq(floppy_queue->queue_lock); | |
2907 | req = elv_next_request(floppy_queue); | |
2908 | spin_unlock_irq(floppy_queue->queue_lock); | |
2909 | if (!req) { | |
2910 | do_floppy = NULL; | |
2911 | unlock_fdc(); | |
2912 | return; | |
2913 | } | |
2914 | current_req = req; | |
2915 | } | |
2916 | drive = (long)current_req->rq_disk->private_data; | |
2917 | set_fdc(drive); | |
2918 | reschedule_timeout(current_reqD, "redo fd request", 0); | |
2919 | ||
2920 | set_floppy(drive); | |
2921 | raw_cmd = &default_raw_cmd; | |
2922 | raw_cmd->flags = 0; | |
2923 | if (start_motor(redo_fd_request)) | |
2924 | return; | |
2925 | disk_change(current_drive); | |
2926 | if (test_bit(current_drive, &fake_change) || | |
2927 | TESTF(FD_DISK_CHANGED)) { | |
2928 | DPRINT("disk absent or changed during operation\n"); | |
2929 | REPEAT; | |
2930 | } | |
2931 | if (!_floppy) { /* Autodetection */ | |
2932 | if (!probing) { | |
2933 | DRS->probed_format = 0; | |
2934 | if (next_valid_format()) { | |
2935 | DPRINT("no autodetectable formats\n"); | |
2936 | _floppy = NULL; | |
2937 | REPEAT; | |
2938 | } | |
2939 | } | |
2940 | probing = 1; | |
2941 | _floppy = | |
2942 | floppy_type + DP->autodetect[DRS->probed_format]; | |
2943 | } else | |
2944 | probing = 0; | |
2945 | errors = &(current_req->errors); | |
2946 | tmp = make_raw_rw_request(); | |
2947 | if (tmp < 2) { | |
2948 | request_done(tmp); | |
2949 | continue; | |
2950 | } | |
2951 | ||
2952 | if (TESTF(FD_NEED_TWADDLE)) | |
2953 | twaddle(); | |
2954 | schedule_bh(floppy_start); | |
2955 | debugt("queue fd request"); | |
2956 | return; | |
2957 | } | |
2958 | #undef REPEAT | |
2959 | } | |
2960 | ||
2961 | static struct cont_t rw_cont = { | |
2962 | .interrupt = rw_interrupt, | |
2963 | .redo = redo_fd_request, | |
2964 | .error = bad_flp_intr, | |
2965 | .done = request_done | |
2966 | }; | |
2967 | ||
2968 | static void process_fd_request(void) | |
2969 | { | |
2970 | cont = &rw_cont; | |
2971 | schedule_bh(redo_fd_request); | |
2972 | } | |
2973 | ||
165125e1 | 2974 | static void do_fd_request(struct request_queue * q) |
1da177e4 LT |
2975 | { |
2976 | if (max_buffer_sectors == 0) { | |
2977 | printk("VFS: do_fd_request called on non-open device\n"); | |
2978 | return; | |
2979 | } | |
2980 | ||
2981 | if (usage_count == 0) { | |
2982 | printk("warning: usage count=0, current_req=%p exiting\n", | |
2983 | current_req); | |
4aff5e23 JA |
2984 | printk("sect=%ld type=%x flags=%x\n", (long)current_req->sector, |
2985 | current_req->cmd_type, current_req->cmd_flags); | |
1da177e4 LT |
2986 | return; |
2987 | } | |
2988 | if (test_bit(0, &fdc_busy)) { | |
2989 | /* fdc busy, this new request will be treated when the | |
2990 | current one is done */ | |
2991 | is_alive("do fd request, old request running"); | |
2992 | return; | |
2993 | } | |
2994 | lock_fdc(MAXTIMEOUT, 0); | |
2995 | process_fd_request(); | |
2996 | is_alive("do fd request"); | |
2997 | } | |
2998 | ||
2999 | static struct cont_t poll_cont = { | |
3000 | .interrupt = success_and_wakeup, | |
3001 | .redo = floppy_ready, | |
3002 | .error = generic_failure, | |
3003 | .done = generic_done | |
3004 | }; | |
3005 | ||
3006 | static int poll_drive(int interruptible, int flag) | |
3007 | { | |
3008 | int ret; | |
06f748c4 | 3009 | |
1da177e4 LT |
3010 | /* no auto-sense, just clear dcl */ |
3011 | raw_cmd = &default_raw_cmd; | |
3012 | raw_cmd->flags = flag; | |
3013 | raw_cmd->track = 0; | |
3014 | raw_cmd->cmd_count = 0; | |
3015 | cont = &poll_cont; | |
3016 | #ifdef DCL_DEBUG | |
3017 | if (DP->flags & FD_DEBUG) { | |
3018 | DPRINT("setting NEWCHANGE in poll_drive\n"); | |
3019 | } | |
3020 | #endif | |
3021 | SETF(FD_DISK_NEWCHANGE); | |
3022 | WAIT(floppy_ready); | |
3023 | return ret; | |
3024 | } | |
3025 | ||
3026 | /* | |
3027 | * User triggered reset | |
3028 | * ==================== | |
3029 | */ | |
3030 | ||
3031 | static void reset_intr(void) | |
3032 | { | |
3033 | printk("weird, reset interrupt called\n"); | |
3034 | } | |
3035 | ||
3036 | static struct cont_t reset_cont = { | |
3037 | .interrupt = reset_intr, | |
3038 | .redo = success_and_wakeup, | |
3039 | .error = generic_failure, | |
3040 | .done = generic_done | |
3041 | }; | |
3042 | ||
3043 | static int user_reset_fdc(int drive, int arg, int interruptible) | |
3044 | { | |
3045 | int ret; | |
3046 | ||
3047 | ret = 0; | |
3048 | LOCK_FDC(drive, interruptible); | |
3049 | if (arg == FD_RESET_ALWAYS) | |
3050 | FDCS->reset = 1; | |
3051 | if (FDCS->reset) { | |
3052 | cont = &reset_cont; | |
3053 | WAIT(reset_fdc); | |
3054 | } | |
3055 | process_fd_request(); | |
3056 | return ret; | |
3057 | } | |
3058 | ||
3059 | /* | |
3060 | * Misc Ioctl's and support | |
3061 | * ======================== | |
3062 | */ | |
3063 | static inline int fd_copyout(void __user *param, const void *address, | |
3064 | unsigned long size) | |
3065 | { | |
3066 | return copy_to_user(param, address, size) ? -EFAULT : 0; | |
3067 | } | |
3068 | ||
3069 | static inline int fd_copyin(void __user *param, void *address, unsigned long size) | |
3070 | { | |
3071 | return copy_from_user(address, param, size) ? -EFAULT : 0; | |
3072 | } | |
3073 | ||
3074 | #define _COPYOUT(x) (copy_to_user((void __user *)param, &(x), sizeof(x)) ? -EFAULT : 0) | |
3075 | #define _COPYIN(x) (copy_from_user(&(x), (void __user *)param, sizeof(x)) ? -EFAULT : 0) | |
3076 | ||
3077 | #define COPYOUT(x) ECALL(_COPYOUT(x)) | |
3078 | #define COPYIN(x) ECALL(_COPYIN(x)) | |
3079 | ||
3080 | static inline const char *drive_name(int type, int drive) | |
3081 | { | |
3082 | struct floppy_struct *floppy; | |
3083 | ||
3084 | if (type) | |
3085 | floppy = floppy_type + type; | |
3086 | else { | |
3087 | if (UDP->native_format) | |
3088 | floppy = floppy_type + UDP->native_format; | |
3089 | else | |
3090 | return "(null)"; | |
3091 | } | |
3092 | if (floppy->name) | |
3093 | return floppy->name; | |
3094 | else | |
3095 | return "(null)"; | |
3096 | } | |
3097 | ||
3098 | /* raw commands */ | |
3099 | static void raw_cmd_done(int flag) | |
3100 | { | |
3101 | int i; | |
3102 | ||
3103 | if (!flag) { | |
3104 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3105 | raw_cmd->flags |= FD_RAW_HARDFAILURE; | |
3106 | } else { | |
3107 | raw_cmd->reply_count = inr; | |
3108 | if (raw_cmd->reply_count > MAX_REPLIES) | |
3109 | raw_cmd->reply_count = 0; | |
3110 | for (i = 0; i < raw_cmd->reply_count; i++) | |
3111 | raw_cmd->reply[i] = reply_buffer[i]; | |
3112 | ||
3113 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3114 | unsigned long flags; | |
3115 | flags = claim_dma_lock(); | |
3116 | raw_cmd->length = fd_get_dma_residue(); | |
3117 | release_dma_lock(flags); | |
3118 | } | |
3119 | ||
3120 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && | |
3121 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) | |
3122 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3123 | ||
3124 | if (disk_change(current_drive)) | |
3125 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; | |
3126 | else | |
3127 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; | |
3128 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) | |
3129 | motor_off_callback(current_drive); | |
3130 | ||
3131 | if (raw_cmd->next && | |
3132 | (!(raw_cmd->flags & FD_RAW_FAILURE) || | |
3133 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && | |
3134 | ((raw_cmd->flags & FD_RAW_FAILURE) || | |
3135 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { | |
3136 | raw_cmd = raw_cmd->next; | |
3137 | return; | |
3138 | } | |
3139 | } | |
3140 | generic_done(flag); | |
3141 | } | |
3142 | ||
3143 | static struct cont_t raw_cmd_cont = { | |
3144 | .interrupt = success_and_wakeup, | |
3145 | .redo = floppy_start, | |
3146 | .error = generic_failure, | |
3147 | .done = raw_cmd_done | |
3148 | }; | |
3149 | ||
3150 | static inline int raw_cmd_copyout(int cmd, char __user *param, | |
3151 | struct floppy_raw_cmd *ptr) | |
3152 | { | |
3153 | int ret; | |
3154 | ||
3155 | while (ptr) { | |
3156 | COPYOUT(*ptr); | |
3157 | param += sizeof(struct floppy_raw_cmd); | |
3158 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { | |
3159 | if (ptr->length >= 0 | |
3160 | && ptr->length <= ptr->buffer_length) | |
3161 | ECALL(fd_copyout | |
3162 | (ptr->data, ptr->kernel_data, | |
3163 | ptr->buffer_length - ptr->length)); | |
3164 | } | |
3165 | ptr = ptr->next; | |
3166 | } | |
3167 | return 0; | |
3168 | } | |
3169 | ||
3170 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) | |
3171 | { | |
06f748c4 JJ |
3172 | struct floppy_raw_cmd *next; |
3173 | struct floppy_raw_cmd *this; | |
1da177e4 LT |
3174 | |
3175 | this = *ptr; | |
3176 | *ptr = NULL; | |
3177 | while (this) { | |
3178 | if (this->buffer_length) { | |
3179 | fd_dma_mem_free((unsigned long)this->kernel_data, | |
3180 | this->buffer_length); | |
3181 | this->buffer_length = 0; | |
3182 | } | |
3183 | next = this->next; | |
3184 | kfree(this); | |
3185 | this = next; | |
3186 | } | |
3187 | } | |
3188 | ||
3189 | static inline int raw_cmd_copyin(int cmd, char __user *param, | |
3190 | struct floppy_raw_cmd **rcmd) | |
3191 | { | |
3192 | struct floppy_raw_cmd *ptr; | |
3193 | int ret; | |
3194 | int i; | |
3195 | ||
3196 | *rcmd = NULL; | |
3197 | while (1) { | |
3198 | ptr = (struct floppy_raw_cmd *) | |
3199 | kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); | |
3200 | if (!ptr) | |
3201 | return -ENOMEM; | |
3202 | *rcmd = ptr; | |
3203 | COPYIN(*ptr); | |
3204 | ptr->next = NULL; | |
3205 | ptr->buffer_length = 0; | |
3206 | param += sizeof(struct floppy_raw_cmd); | |
3207 | if (ptr->cmd_count > 33) | |
3208 | /* the command may now also take up the space | |
3209 | * initially intended for the reply & the | |
3210 | * reply count. Needed for long 82078 commands | |
3211 | * such as RESTORE, which takes ... 17 command | |
3212 | * bytes. Murphy's law #137: When you reserve | |
3213 | * 16 bytes for a structure, you'll one day | |
3214 | * discover that you really need 17... | |
3215 | */ | |
3216 | return -EINVAL; | |
3217 | ||
3218 | for (i = 0; i < 16; i++) | |
3219 | ptr->reply[i] = 0; | |
3220 | ptr->resultcode = 0; | |
3221 | ptr->kernel_data = NULL; | |
3222 | ||
3223 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3224 | if (ptr->length <= 0) | |
3225 | return -EINVAL; | |
3226 | ptr->kernel_data = | |
3227 | (char *)fd_dma_mem_alloc(ptr->length); | |
3228 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); | |
3229 | if (!ptr->kernel_data) | |
3230 | return -ENOMEM; | |
3231 | ptr->buffer_length = ptr->length; | |
3232 | } | |
3233 | if (ptr->flags & FD_RAW_WRITE) | |
3234 | ECALL(fd_copyin(ptr->data, ptr->kernel_data, | |
3235 | ptr->length)); | |
3236 | rcmd = &(ptr->next); | |
3237 | if (!(ptr->flags & FD_RAW_MORE)) | |
3238 | return 0; | |
3239 | ptr->rate &= 0x43; | |
3240 | } | |
3241 | } | |
3242 | ||
3243 | static int raw_cmd_ioctl(int cmd, void __user *param) | |
3244 | { | |
1da177e4 | 3245 | struct floppy_raw_cmd *my_raw_cmd; |
06f748c4 JJ |
3246 | int drive; |
3247 | int ret2; | |
3248 | int ret; | |
1da177e4 LT |
3249 | |
3250 | if (FDCS->rawcmd <= 1) | |
3251 | FDCS->rawcmd = 1; | |
3252 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3253 | if (FDC(drive) != fdc) | |
3254 | continue; | |
3255 | if (drive == current_drive) { | |
3256 | if (UDRS->fd_ref > 1) { | |
3257 | FDCS->rawcmd = 2; | |
3258 | break; | |
3259 | } | |
3260 | } else if (UDRS->fd_ref) { | |
3261 | FDCS->rawcmd = 2; | |
3262 | break; | |
3263 | } | |
3264 | } | |
3265 | ||
3266 | if (FDCS->reset) | |
3267 | return -EIO; | |
3268 | ||
3269 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); | |
3270 | if (ret) { | |
3271 | raw_cmd_free(&my_raw_cmd); | |
3272 | return ret; | |
3273 | } | |
3274 | ||
3275 | raw_cmd = my_raw_cmd; | |
3276 | cont = &raw_cmd_cont; | |
3277 | ret = wait_til_done(floppy_start, 1); | |
3278 | #ifdef DCL_DEBUG | |
3279 | if (DP->flags & FD_DEBUG) { | |
3280 | DPRINT("calling disk change from raw_cmd ioctl\n"); | |
3281 | } | |
3282 | #endif | |
3283 | ||
3284 | if (ret != -EINTR && FDCS->reset) | |
3285 | ret = -EIO; | |
3286 | ||
3287 | DRS->track = NO_TRACK; | |
3288 | ||
3289 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); | |
3290 | if (!ret) | |
3291 | ret = ret2; | |
3292 | raw_cmd_free(&my_raw_cmd); | |
3293 | return ret; | |
3294 | } | |
3295 | ||
3296 | static int invalidate_drive(struct block_device *bdev) | |
3297 | { | |
3298 | /* invalidate the buffer track to force a reread */ | |
3299 | set_bit((long)bdev->bd_disk->private_data, &fake_change); | |
3300 | process_fd_request(); | |
3301 | check_disk_change(bdev); | |
3302 | return 0; | |
3303 | } | |
3304 | ||
3305 | static inline int set_geometry(unsigned int cmd, struct floppy_struct *g, | |
3306 | int drive, int type, struct block_device *bdev) | |
3307 | { | |
3308 | int cnt; | |
3309 | ||
3310 | /* sanity checking for parameters. */ | |
3311 | if (g->sect <= 0 || | |
3312 | g->head <= 0 || | |
3313 | g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || | |
3314 | /* check if reserved bits are set */ | |
3315 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_ZEROBASED)) != 0) | |
3316 | return -EINVAL; | |
3317 | if (type) { | |
3318 | if (!capable(CAP_SYS_ADMIN)) | |
3319 | return -EPERM; | |
b1c82b5c | 3320 | mutex_lock(&open_lock); |
1da177e4 LT |
3321 | LOCK_FDC(drive, 1); |
3322 | floppy_type[type] = *g; | |
3323 | floppy_type[type].name = "user format"; | |
3324 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) | |
3325 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = | |
3326 | floppy_type[type].size + 1; | |
3327 | process_fd_request(); | |
3328 | for (cnt = 0; cnt < N_DRIVE; cnt++) { | |
3329 | struct block_device *bdev = opened_bdev[cnt]; | |
3330 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) | |
3331 | continue; | |
2ef41634 | 3332 | __invalidate_device(bdev); |
1da177e4 | 3333 | } |
b1c82b5c | 3334 | mutex_unlock(&open_lock); |
1da177e4 LT |
3335 | } else { |
3336 | int oldStretch; | |
3337 | LOCK_FDC(drive, 1); | |
3338 | if (cmd != FDDEFPRM) | |
3339 | /* notice a disk change immediately, else | |
3340 | * we lose our settings immediately*/ | |
3341 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3342 | oldStretch = g->stretch; | |
3343 | user_params[drive] = *g; | |
3344 | if (buffer_drive == drive) | |
3345 | SUPBOUND(buffer_max, user_params[drive].sect); | |
3346 | current_type[drive] = &user_params[drive]; | |
3347 | floppy_sizes[drive] = user_params[drive].size; | |
3348 | if (cmd == FDDEFPRM) | |
3349 | DRS->keep_data = -1; | |
3350 | else | |
3351 | DRS->keep_data = 1; | |
3352 | /* invalidation. Invalidate only when needed, i.e. | |
3353 | * when there are already sectors in the buffer cache | |
3354 | * whose number will change. This is useful, because | |
3355 | * mtools often changes the geometry of the disk after | |
3356 | * looking at the boot block */ | |
3357 | if (DRS->maxblock > user_params[drive].sect || | |
3358 | DRS->maxtrack || | |
3359 | ((user_params[drive].sect ^ oldStretch) & | |
3360 | (FD_SWAPSIDES | FD_ZEROBASED))) | |
3361 | invalidate_drive(bdev); | |
3362 | else | |
3363 | process_fd_request(); | |
3364 | } | |
3365 | return 0; | |
3366 | } | |
3367 | ||
3368 | /* handle obsolete ioctl's */ | |
3369 | static int ioctl_table[] = { | |
3370 | FDCLRPRM, | |
3371 | FDSETPRM, | |
3372 | FDDEFPRM, | |
3373 | FDGETPRM, | |
3374 | FDMSGON, | |
3375 | FDMSGOFF, | |
3376 | FDFMTBEG, | |
3377 | FDFMTTRK, | |
3378 | FDFMTEND, | |
3379 | FDSETEMSGTRESH, | |
3380 | FDFLUSH, | |
3381 | FDSETMAXERRS, | |
3382 | FDGETMAXERRS, | |
3383 | FDGETDRVTYP, | |
3384 | FDSETDRVPRM, | |
3385 | FDGETDRVPRM, | |
3386 | FDGETDRVSTAT, | |
3387 | FDPOLLDRVSTAT, | |
3388 | FDRESET, | |
3389 | FDGETFDCSTAT, | |
3390 | FDWERRORCLR, | |
3391 | FDWERRORGET, | |
3392 | FDRAWCMD, | |
3393 | FDEJECT, | |
3394 | FDTWADDLE | |
3395 | }; | |
3396 | ||
3397 | static inline int normalize_ioctl(int *cmd, int *size) | |
3398 | { | |
3399 | int i; | |
3400 | ||
3401 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { | |
3402 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { | |
3403 | *size = _IOC_SIZE(*cmd); | |
3404 | *cmd = ioctl_table[i]; | |
3405 | if (*size > _IOC_SIZE(*cmd)) { | |
3406 | printk("ioctl not yet supported\n"); | |
3407 | return -EFAULT; | |
3408 | } | |
3409 | return 0; | |
3410 | } | |
3411 | } | |
3412 | return -EINVAL; | |
3413 | } | |
3414 | ||
3415 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) | |
3416 | { | |
3417 | if (type) | |
3418 | *g = &floppy_type[type]; | |
3419 | else { | |
3420 | LOCK_FDC(drive, 0); | |
3421 | CALL(poll_drive(0, 0)); | |
3422 | process_fd_request(); | |
3423 | *g = current_type[drive]; | |
3424 | } | |
3425 | if (!*g) | |
3426 | return -ENODEV; | |
3427 | return 0; | |
3428 | } | |
3429 | ||
a885c8c4 CH |
3430 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3431 | { | |
3432 | int drive = (long)bdev->bd_disk->private_data; | |
3433 | int type = ITYPE(drive_state[drive].fd_device); | |
3434 | struct floppy_struct *g; | |
3435 | int ret; | |
3436 | ||
3437 | ret = get_floppy_geometry(drive, type, &g); | |
3438 | if (ret) | |
3439 | return ret; | |
3440 | ||
3441 | geo->heads = g->head; | |
3442 | geo->sectors = g->sect; | |
3443 | geo->cylinders = g->track; | |
3444 | return 0; | |
3445 | } | |
3446 | ||
1da177e4 LT |
3447 | static int fd_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
3448 | unsigned long param) | |
3449 | { | |
3450 | #define FD_IOCTL_ALLOWED ((filp) && (filp)->private_data) | |
3451 | #define OUT(c,x) case c: outparam = (const char *) (x); break | |
3452 | #define IN(c,x,tag) case c: *(x) = inparam. tag ; return 0 | |
3453 | ||
3454 | int drive = (long)inode->i_bdev->bd_disk->private_data; | |
06f748c4 JJ |
3455 | int type = ITYPE(UDRS->fd_device); |
3456 | int i; | |
1da177e4 LT |
3457 | int ret; |
3458 | int size; | |
3459 | union inparam { | |
3460 | struct floppy_struct g; /* geometry */ | |
3461 | struct format_descr f; | |
3462 | struct floppy_max_errors max_errors; | |
3463 | struct floppy_drive_params dp; | |
3464 | } inparam; /* parameters coming from user space */ | |
3465 | const char *outparam; /* parameters passed back to user space */ | |
3466 | ||
3467 | /* convert compatibility eject ioctls into floppy eject ioctl. | |
3468 | * We do this in order to provide a means to eject floppy disks before | |
3469 | * installing the new fdutils package */ | |
3470 | if (cmd == CDROMEJECT || /* CD-ROM eject */ | |
3471 | cmd == 0x6470 /* SunOS floppy eject */ ) { | |
3472 | DPRINT("obsolete eject ioctl\n"); | |
3473 | DPRINT("please use floppycontrol --eject\n"); | |
3474 | cmd = FDEJECT; | |
3475 | } | |
3476 | ||
1da177e4 LT |
3477 | /* convert the old style command into a new style command */ |
3478 | if ((cmd & 0xff00) == 0x0200) { | |
3479 | ECALL(normalize_ioctl(&cmd, &size)); | |
3480 | } else | |
3481 | return -EINVAL; | |
3482 | ||
3483 | /* permission checks */ | |
3484 | if (((cmd & 0x40) && !FD_IOCTL_ALLOWED) || | |
3485 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) | |
3486 | return -EPERM; | |
3487 | ||
3488 | /* copyin */ | |
3489 | CLEARSTRUCT(&inparam); | |
3490 | if (_IOC_DIR(cmd) & _IOC_WRITE) | |
3491 | ECALL(fd_copyin((void __user *)param, &inparam, size)) | |
3492 | ||
3493 | switch (cmd) { | |
3494 | case FDEJECT: | |
3495 | if (UDRS->fd_ref != 1) | |
3496 | /* somebody else has this drive open */ | |
3497 | return -EBUSY; | |
3498 | LOCK_FDC(drive, 1); | |
3499 | ||
3500 | /* do the actual eject. Fails on | |
3501 | * non-Sparc architectures */ | |
3502 | ret = fd_eject(UNIT(drive)); | |
3503 | ||
3504 | USETF(FD_DISK_CHANGED); | |
3505 | USETF(FD_VERIFY); | |
3506 | process_fd_request(); | |
3507 | return ret; | |
3508 | case FDCLRPRM: | |
3509 | LOCK_FDC(drive, 1); | |
3510 | current_type[drive] = NULL; | |
3511 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; | |
3512 | UDRS->keep_data = 0; | |
3513 | return invalidate_drive(inode->i_bdev); | |
3514 | case FDSETPRM: | |
3515 | case FDDEFPRM: | |
3516 | return set_geometry(cmd, &inparam.g, | |
3517 | drive, type, inode->i_bdev); | |
3518 | case FDGETPRM: | |
3519 | ECALL(get_floppy_geometry(drive, type, | |
3520 | (struct floppy_struct **) | |
3521 | &outparam)); | |
3522 | break; | |
3523 | ||
3524 | case FDMSGON: | |
3525 | UDP->flags |= FTD_MSG; | |
3526 | return 0; | |
3527 | case FDMSGOFF: | |
3528 | UDP->flags &= ~FTD_MSG; | |
3529 | return 0; | |
3530 | ||
3531 | case FDFMTBEG: | |
3532 | LOCK_FDC(drive, 1); | |
3533 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3534 | ret = UDRS->flags; | |
3535 | process_fd_request(); | |
3536 | if (ret & FD_VERIFY) | |
3537 | return -ENODEV; | |
3538 | if (!(ret & FD_DISK_WRITABLE)) | |
3539 | return -EROFS; | |
3540 | return 0; | |
3541 | case FDFMTTRK: | |
3542 | if (UDRS->fd_ref != 1) | |
3543 | return -EBUSY; | |
3544 | return do_format(drive, &inparam.f); | |
3545 | case FDFMTEND: | |
3546 | case FDFLUSH: | |
3547 | LOCK_FDC(drive, 1); | |
3548 | return invalidate_drive(inode->i_bdev); | |
3549 | ||
3550 | case FDSETEMSGTRESH: | |
3551 | UDP->max_errors.reporting = | |
3552 | (unsigned short)(param & 0x0f); | |
3553 | return 0; | |
3554 | OUT(FDGETMAXERRS, &UDP->max_errors); | |
3555 | IN(FDSETMAXERRS, &UDP->max_errors, max_errors); | |
3556 | ||
3557 | case FDGETDRVTYP: | |
3558 | outparam = drive_name(type, drive); | |
3559 | SUPBOUND(size, strlen(outparam) + 1); | |
3560 | break; | |
3561 | ||
3562 | IN(FDSETDRVPRM, UDP, dp); | |
3563 | OUT(FDGETDRVPRM, UDP); | |
3564 | ||
3565 | case FDPOLLDRVSTAT: | |
3566 | LOCK_FDC(drive, 1); | |
3567 | CALL(poll_drive(1, FD_RAW_NEED_DISK)); | |
3568 | process_fd_request(); | |
3569 | /* fall through */ | |
3570 | OUT(FDGETDRVSTAT, UDRS); | |
3571 | ||
3572 | case FDRESET: | |
3573 | return user_reset_fdc(drive, (int)param, 1); | |
3574 | ||
3575 | OUT(FDGETFDCSTAT, UFDCS); | |
3576 | ||
3577 | case FDWERRORCLR: | |
3578 | CLEARSTRUCT(UDRWE); | |
3579 | return 0; | |
3580 | OUT(FDWERRORGET, UDRWE); | |
3581 | ||
3582 | case FDRAWCMD: | |
3583 | if (type) | |
3584 | return -EINVAL; | |
3585 | LOCK_FDC(drive, 1); | |
3586 | set_floppy(drive); | |
3587 | CALL(i = raw_cmd_ioctl(cmd, (void __user *)param)); | |
3588 | process_fd_request(); | |
3589 | return i; | |
3590 | ||
3591 | case FDTWADDLE: | |
3592 | LOCK_FDC(drive, 1); | |
3593 | twaddle(); | |
3594 | process_fd_request(); | |
3595 | return 0; | |
3596 | ||
3597 | default: | |
3598 | return -EINVAL; | |
3599 | } | |
3600 | ||
3601 | if (_IOC_DIR(cmd) & _IOC_READ) | |
3602 | return fd_copyout((void __user *)param, outparam, size); | |
3603 | else | |
3604 | return 0; | |
3605 | #undef OUT | |
3606 | #undef IN | |
3607 | } | |
3608 | ||
3609 | static void __init config_types(void) | |
3610 | { | |
3611 | int first = 1; | |
3612 | int drive; | |
3613 | ||
3614 | /* read drive info out of physical CMOS */ | |
3615 | drive = 0; | |
3616 | if (!UDP->cmos) | |
3617 | UDP->cmos = FLOPPY0_TYPE; | |
3618 | drive = 1; | |
3619 | if (!UDP->cmos && FLOPPY1_TYPE) | |
3620 | UDP->cmos = FLOPPY1_TYPE; | |
3621 | ||
06f748c4 | 3622 | /* FIXME: additional physical CMOS drive detection should go here */ |
1da177e4 LT |
3623 | |
3624 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3625 | unsigned int type = UDP->cmos; | |
3626 | struct floppy_drive_params *params; | |
3627 | const char *name = NULL; | |
3628 | static char temparea[32]; | |
3629 | ||
945f390f | 3630 | if (type < ARRAY_SIZE(default_drive_params)) { |
1da177e4 LT |
3631 | params = &default_drive_params[type].params; |
3632 | if (type) { | |
3633 | name = default_drive_params[type].name; | |
3634 | allowed_drive_mask |= 1 << drive; | |
3635 | } else | |
3636 | allowed_drive_mask &= ~(1 << drive); | |
3637 | } else { | |
3638 | params = &default_drive_params[0].params; | |
3639 | sprintf(temparea, "unknown type %d (usb?)", type); | |
3640 | name = temparea; | |
3641 | } | |
3642 | if (name) { | |
3643 | const char *prepend = ","; | |
3644 | if (first) { | |
3645 | prepend = KERN_INFO "Floppy drive(s):"; | |
3646 | first = 0; | |
3647 | } | |
3648 | printk("%s fd%d is %s", prepend, drive, name); | |
1da177e4 LT |
3649 | } |
3650 | *UDP = *params; | |
3651 | } | |
3652 | if (!first) | |
3653 | printk("\n"); | |
3654 | } | |
3655 | ||
3656 | static int floppy_release(struct inode *inode, struct file *filp) | |
3657 | { | |
3658 | int drive = (long)inode->i_bdev->bd_disk->private_data; | |
3659 | ||
b1c82b5c | 3660 | mutex_lock(&open_lock); |
1da177e4 LT |
3661 | if (UDRS->fd_ref < 0) |
3662 | UDRS->fd_ref = 0; | |
3663 | else if (!UDRS->fd_ref--) { | |
3664 | DPRINT("floppy_release with fd_ref == 0"); | |
3665 | UDRS->fd_ref = 0; | |
3666 | } | |
3667 | if (!UDRS->fd_ref) | |
3668 | opened_bdev[drive] = NULL; | |
b1c82b5c | 3669 | mutex_unlock(&open_lock); |
3e541a4a | 3670 | |
1da177e4 LT |
3671 | return 0; |
3672 | } | |
3673 | ||
3674 | /* | |
3675 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
3676 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
3677 | * drive with different device numbers. | |
3678 | */ | |
3679 | static int floppy_open(struct inode *inode, struct file *filp) | |
3680 | { | |
3681 | int drive = (long)inode->i_bdev->bd_disk->private_data; | |
3682 | int old_dev; | |
3683 | int try; | |
3684 | int res = -EBUSY; | |
3685 | char *tmp; | |
3686 | ||
3687 | filp->private_data = (void *)0; | |
b1c82b5c | 3688 | mutex_lock(&open_lock); |
1da177e4 LT |
3689 | old_dev = UDRS->fd_device; |
3690 | if (opened_bdev[drive] && opened_bdev[drive] != inode->i_bdev) | |
3691 | goto out2; | |
3692 | ||
3693 | if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { | |
3694 | USETF(FD_DISK_CHANGED); | |
3695 | USETF(FD_VERIFY); | |
3696 | } | |
3697 | ||
3698 | if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (filp->f_flags & O_EXCL))) | |
3699 | goto out2; | |
3700 | ||
1da177e4 LT |
3701 | if (filp->f_flags & O_EXCL) |
3702 | UDRS->fd_ref = -1; | |
3703 | else | |
3704 | UDRS->fd_ref++; | |
3705 | ||
3706 | opened_bdev[drive] = inode->i_bdev; | |
3707 | ||
3708 | res = -ENXIO; | |
3709 | ||
3710 | if (!floppy_track_buffer) { | |
3711 | /* if opening an ED drive, reserve a big buffer, | |
3712 | * else reserve a small one */ | |
3713 | if ((UDP->cmos == 6) || (UDP->cmos == 5)) | |
3714 | try = 64; /* Only 48 actually useful */ | |
3715 | else | |
3716 | try = 32; /* Only 24 actually useful */ | |
3717 | ||
3718 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3719 | if (!tmp && !floppy_track_buffer) { | |
3720 | try >>= 1; /* buffer only one side */ | |
3721 | INFBOUND(try, 16); | |
3722 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3723 | } | |
3724 | if (!tmp && !floppy_track_buffer) { | |
3725 | fallback_on_nodma_alloc(&tmp, 2048 * try); | |
3726 | } | |
3727 | if (!tmp && !floppy_track_buffer) { | |
3728 | DPRINT("Unable to allocate DMA memory\n"); | |
3729 | goto out; | |
3730 | } | |
3731 | if (floppy_track_buffer) { | |
3732 | if (tmp) | |
3733 | fd_dma_mem_free((unsigned long)tmp, try * 1024); | |
3734 | } else { | |
3735 | buffer_min = buffer_max = -1; | |
3736 | floppy_track_buffer = tmp; | |
3737 | max_buffer_sectors = try; | |
3738 | } | |
3739 | } | |
3740 | ||
3741 | UDRS->fd_device = iminor(inode); | |
3742 | set_capacity(disks[drive], floppy_sizes[iminor(inode)]); | |
3743 | if (old_dev != -1 && old_dev != iminor(inode)) { | |
3744 | if (buffer_drive == drive) | |
3745 | buffer_track = -1; | |
3746 | } | |
3747 | ||
3748 | /* Allow ioctls if we have write-permissions even if read-only open. | |
3749 | * Needed so that programs such as fdrawcmd still can work on write | |
3750 | * protected disks */ | |
8c744fb8 | 3751 | if ((filp->f_mode & FMODE_WRITE) || !file_permission(filp, MAY_WRITE)) |
1da177e4 LT |
3752 | filp->private_data = (void *)8; |
3753 | ||
3754 | if (UFDCS->rawcmd == 1) | |
3755 | UFDCS->rawcmd = 2; | |
3756 | ||
3757 | if (!(filp->f_flags & O_NDELAY)) { | |
3758 | if (filp->f_mode & 3) { | |
3759 | UDRS->last_checked = 0; | |
3760 | check_disk_change(inode->i_bdev); | |
3761 | if (UTESTF(FD_DISK_CHANGED)) | |
3762 | goto out; | |
3763 | } | |
3764 | res = -EROFS; | |
3765 | if ((filp->f_mode & 2) && !(UTESTF(FD_DISK_WRITABLE))) | |
3766 | goto out; | |
3767 | } | |
b1c82b5c | 3768 | mutex_unlock(&open_lock); |
1da177e4 LT |
3769 | return 0; |
3770 | out: | |
3771 | if (UDRS->fd_ref < 0) | |
3772 | UDRS->fd_ref = 0; | |
3773 | else | |
3774 | UDRS->fd_ref--; | |
3775 | if (!UDRS->fd_ref) | |
3776 | opened_bdev[drive] = NULL; | |
1da177e4 | 3777 | out2: |
b1c82b5c | 3778 | mutex_unlock(&open_lock); |
1da177e4 LT |
3779 | return res; |
3780 | } | |
3781 | ||
3782 | /* | |
3783 | * Check if the disk has been changed or if a change has been faked. | |
3784 | */ | |
3785 | static int check_floppy_change(struct gendisk *disk) | |
3786 | { | |
3787 | int drive = (long)disk->private_data; | |
3788 | ||
3789 | if (UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY)) | |
3790 | return 1; | |
3791 | ||
50297cbf | 3792 | if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { |
1da177e4 LT |
3793 | lock_fdc(drive, 0); |
3794 | poll_drive(0, 0); | |
3795 | process_fd_request(); | |
1da177e4 LT |
3796 | } |
3797 | ||
3798 | if (UTESTF(FD_DISK_CHANGED) || | |
3799 | UTESTF(FD_VERIFY) || | |
3800 | test_bit(drive, &fake_change) || | |
3801 | (!ITYPE(UDRS->fd_device) && !current_type[drive])) | |
3802 | return 1; | |
3803 | return 0; | |
3804 | } | |
3805 | ||
3806 | /* | |
3807 | * This implements "read block 0" for floppy_revalidate(). | |
3808 | * Needed for format autodetection, checking whether there is | |
3809 | * a disk in the drive, and whether that disk is writable. | |
3810 | */ | |
3811 | ||
6712ecf8 | 3812 | static void floppy_rb0_complete(struct bio *bio, |
1da177e4 LT |
3813 | int err) |
3814 | { | |
1da177e4 | 3815 | complete((struct completion *)bio->bi_private); |
1da177e4 LT |
3816 | } |
3817 | ||
3818 | static int __floppy_read_block_0(struct block_device *bdev) | |
3819 | { | |
3820 | struct bio bio; | |
3821 | struct bio_vec bio_vec; | |
3822 | struct completion complete; | |
3823 | struct page *page; | |
3824 | size_t size; | |
3825 | ||
3826 | page = alloc_page(GFP_NOIO); | |
3827 | if (!page) { | |
3828 | process_fd_request(); | |
3829 | return -ENOMEM; | |
3830 | } | |
3831 | ||
3832 | size = bdev->bd_block_size; | |
3833 | if (!size) | |
3834 | size = 1024; | |
3835 | ||
3836 | bio_init(&bio); | |
3837 | bio.bi_io_vec = &bio_vec; | |
3838 | bio_vec.bv_page = page; | |
3839 | bio_vec.bv_len = size; | |
3840 | bio_vec.bv_offset = 0; | |
3841 | bio.bi_vcnt = 1; | |
3842 | bio.bi_idx = 0; | |
3843 | bio.bi_size = size; | |
3844 | bio.bi_bdev = bdev; | |
3845 | bio.bi_sector = 0; | |
3846 | init_completion(&complete); | |
3847 | bio.bi_private = &complete; | |
3848 | bio.bi_end_io = floppy_rb0_complete; | |
3849 | ||
3850 | submit_bio(READ, &bio); | |
3851 | generic_unplug_device(bdev_get_queue(bdev)); | |
3852 | process_fd_request(); | |
3853 | wait_for_completion(&complete); | |
3854 | ||
3855 | __free_page(page); | |
3856 | ||
3857 | return 0; | |
3858 | } | |
3859 | ||
3860 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading | |
3861 | * the bootblock (block 0). "Autodetection" is also needed to check whether | |
3862 | * there is a disk in the drive at all... Thus we also do it for fixed | |
3863 | * geometry formats */ | |
3864 | static int floppy_revalidate(struct gendisk *disk) | |
3865 | { | |
3866 | int drive = (long)disk->private_data; | |
3867 | #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device)) | |
3868 | int cf; | |
3869 | int res = 0; | |
3870 | ||
3871 | if (UTESTF(FD_DISK_CHANGED) || | |
3872 | UTESTF(FD_VERIFY) || test_bit(drive, &fake_change) || NO_GEOM) { | |
3873 | if (usage_count == 0) { | |
3874 | printk("VFS: revalidate called on non-open device.\n"); | |
3875 | return -EFAULT; | |
3876 | } | |
3877 | lock_fdc(drive, 0); | |
3878 | cf = UTESTF(FD_DISK_CHANGED) || UTESTF(FD_VERIFY); | |
3879 | if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) { | |
3880 | process_fd_request(); /*already done by another thread */ | |
3881 | return 0; | |
3882 | } | |
3883 | UDRS->maxblock = 0; | |
3884 | UDRS->maxtrack = 0; | |
3885 | if (buffer_drive == drive) | |
3886 | buffer_track = -1; | |
3887 | clear_bit(drive, &fake_change); | |
3888 | UCLEARF(FD_DISK_CHANGED); | |
3889 | if (cf) | |
3890 | UDRS->generation++; | |
3891 | if (NO_GEOM) { | |
3892 | /* auto-sensing */ | |
3893 | res = __floppy_read_block_0(opened_bdev[drive]); | |
3894 | } else { | |
3895 | if (cf) | |
3896 | poll_drive(0, FD_RAW_NEED_DISK); | |
3897 | process_fd_request(); | |
3898 | } | |
3899 | } | |
3900 | set_capacity(disk, floppy_sizes[UDRS->fd_device]); | |
3901 | return res; | |
3902 | } | |
3903 | ||
3904 | static struct block_device_operations floppy_fops = { | |
06f748c4 JJ |
3905 | .owner = THIS_MODULE, |
3906 | .open = floppy_open, | |
3907 | .release = floppy_release, | |
3908 | .ioctl = fd_ioctl, | |
3909 | .getgeo = fd_getgeo, | |
3910 | .media_changed = check_floppy_change, | |
3911 | .revalidate_disk = floppy_revalidate, | |
1da177e4 | 3912 | }; |
1da177e4 | 3913 | |
1da177e4 LT |
3914 | /* |
3915 | * Floppy Driver initialization | |
3916 | * ============================= | |
3917 | */ | |
3918 | ||
3919 | /* Determine the floppy disk controller type */ | |
3920 | /* This routine was written by David C. Niemi */ | |
3921 | static char __init get_fdc_version(void) | |
3922 | { | |
3923 | int r; | |
3924 | ||
3925 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ | |
3926 | if (FDCS->reset) | |
3927 | return FDC_NONE; | |
3928 | if ((r = result()) <= 0x00) | |
3929 | return FDC_NONE; /* No FDC present ??? */ | |
3930 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
3931 | printk(KERN_INFO "FDC %d is an 8272A\n", fdc); | |
3932 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ | |
3933 | } | |
3934 | if (r != 10) { | |
3935 | printk | |
3936 | ("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", | |
3937 | fdc, r); | |
3938 | return FDC_UNKNOWN; | |
3939 | } | |
3940 | ||
3941 | if (!fdc_configure()) { | |
3942 | printk(KERN_INFO "FDC %d is an 82072\n", fdc); | |
3943 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ | |
3944 | } | |
3945 | ||
3946 | output_byte(FD_PERPENDICULAR); | |
3947 | if (need_more_output() == MORE_OUTPUT) { | |
3948 | output_byte(0); | |
3949 | } else { | |
3950 | printk(KERN_INFO "FDC %d is an 82072A\n", fdc); | |
3951 | return FDC_82072A; /* 82072A as found on Sparcs. */ | |
3952 | } | |
3953 | ||
3954 | output_byte(FD_UNLOCK); | |
3955 | r = result(); | |
3956 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
3957 | printk(KERN_INFO "FDC %d is a pre-1991 82077\n", fdc); | |
3958 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know | |
3959 | * LOCK/UNLOCK */ | |
3960 | } | |
3961 | if ((r != 1) || (reply_buffer[0] != 0x00)) { | |
3962 | printk("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", | |
3963 | fdc, r); | |
3964 | return FDC_UNKNOWN; | |
3965 | } | |
3966 | output_byte(FD_PARTID); | |
3967 | r = result(); | |
3968 | if (r != 1) { | |
3969 | printk("FDC %d init: PARTID: unexpected return of %d bytes.\n", | |
3970 | fdc, r); | |
3971 | return FDC_UNKNOWN; | |
3972 | } | |
3973 | if (reply_buffer[0] == 0x80) { | |
3974 | printk(KERN_INFO "FDC %d is a post-1991 82077\n", fdc); | |
3975 | return FDC_82077; /* Revised 82077AA passes all the tests */ | |
3976 | } | |
3977 | switch (reply_buffer[0] >> 5) { | |
3978 | case 0x0: | |
3979 | /* Either a 82078-1 or a 82078SL running at 5Volt */ | |
3980 | printk(KERN_INFO "FDC %d is an 82078.\n", fdc); | |
3981 | return FDC_82078; | |
3982 | case 0x1: | |
3983 | printk(KERN_INFO "FDC %d is a 44pin 82078\n", fdc); | |
3984 | return FDC_82078; | |
3985 | case 0x2: | |
3986 | printk(KERN_INFO "FDC %d is a S82078B\n", fdc); | |
3987 | return FDC_S82078B; | |
3988 | case 0x3: | |
3989 | printk(KERN_INFO "FDC %d is a National Semiconductor PC87306\n", | |
3990 | fdc); | |
3991 | return FDC_87306; | |
3992 | default: | |
3993 | printk(KERN_INFO | |
3994 | "FDC %d init: 82078 variant with unknown PARTID=%d.\n", | |
3995 | fdc, reply_buffer[0] >> 5); | |
3996 | return FDC_82078_UNKN; | |
3997 | } | |
3998 | } /* get_fdc_version */ | |
3999 | ||
4000 | /* lilo configuration */ | |
4001 | ||
4002 | static void __init floppy_set_flags(int *ints, int param, int param2) | |
4003 | { | |
4004 | int i; | |
4005 | ||
4006 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4007 | if (param) | |
4008 | default_drive_params[i].params.flags |= param2; | |
4009 | else | |
4010 | default_drive_params[i].params.flags &= ~param2; | |
4011 | } | |
4012 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); | |
4013 | } | |
4014 | ||
4015 | static void __init daring(int *ints, int param, int param2) | |
4016 | { | |
4017 | int i; | |
4018 | ||
4019 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4020 | if (param) { | |
4021 | default_drive_params[i].params.select_delay = 0; | |
4022 | default_drive_params[i].params.flags |= | |
4023 | FD_SILENT_DCL_CLEAR; | |
4024 | } else { | |
4025 | default_drive_params[i].params.select_delay = | |
4026 | 2 * HZ / 100; | |
4027 | default_drive_params[i].params.flags &= | |
4028 | ~FD_SILENT_DCL_CLEAR; | |
4029 | } | |
4030 | } | |
4031 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); | |
4032 | } | |
4033 | ||
4034 | static void __init set_cmos(int *ints, int dummy, int dummy2) | |
4035 | { | |
4036 | int current_drive = 0; | |
4037 | ||
4038 | if (ints[0] != 2) { | |
4039 | DPRINT("wrong number of parameters for CMOS\n"); | |
4040 | return; | |
4041 | } | |
4042 | current_drive = ints[1]; | |
4043 | if (current_drive < 0 || current_drive >= 8) { | |
4044 | DPRINT("bad drive for set_cmos\n"); | |
4045 | return; | |
4046 | } | |
4047 | #if N_FDC > 1 | |
4048 | if (current_drive >= 4 && !FDC2) | |
4049 | FDC2 = 0x370; | |
4050 | #endif | |
4051 | DP->cmos = ints[2]; | |
4052 | DPRINT("setting CMOS code to %d\n", ints[2]); | |
4053 | } | |
4054 | ||
4055 | static struct param_table { | |
4056 | const char *name; | |
4057 | void (*fn) (int *ints, int param, int param2); | |
4058 | int *var; | |
4059 | int def_param; | |
4060 | int param2; | |
4061 | } config_params[] __initdata = { | |
4062 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4063 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4064 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, | |
4065 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, | |
4066 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, | |
4067 | {"daring", daring, NULL, 1, 0}, | |
4068 | #if N_FDC > 1 | |
4069 | {"two_fdc", NULL, &FDC2, 0x370, 0}, | |
4070 | {"one_fdc", NULL, &FDC2, 0, 0}, | |
4071 | #endif | |
4072 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, | |
4073 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, | |
4074 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, | |
4075 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, | |
4076 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, | |
4077 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, | |
4078 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, | |
4079 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, | |
4080 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, | |
4081 | {"nofifo", NULL, &no_fifo, 0x20, 0}, | |
4082 | {"usefifo", NULL, &no_fifo, 0, 0}, | |
4083 | {"cmos", set_cmos, NULL, 0, 0}, | |
4084 | {"slow", NULL, &slow_floppy, 1, 0}, | |
4085 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, | |
4086 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, | |
4087 | {"L40SX", NULL, &print_unex, 0, 0} | |
4088 | ||
4089 | EXTRA_FLOPPY_PARAMS | |
4090 | }; | |
4091 | ||
4092 | static int __init floppy_setup(char *str) | |
4093 | { | |
4094 | int i; | |
4095 | int param; | |
4096 | int ints[11]; | |
4097 | ||
4098 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
4099 | if (str) { | |
4100 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { | |
4101 | if (strcmp(str, config_params[i].name) == 0) { | |
4102 | if (ints[0]) | |
4103 | param = ints[1]; | |
4104 | else | |
4105 | param = config_params[i].def_param; | |
4106 | if (config_params[i].fn) | |
4107 | config_params[i]. | |
4108 | fn(ints, param, | |
4109 | config_params[i].param2); | |
4110 | if (config_params[i].var) { | |
4111 | DPRINT("%s=%d\n", str, param); | |
4112 | *config_params[i].var = param; | |
4113 | } | |
4114 | return 1; | |
4115 | } | |
4116 | } | |
4117 | } | |
4118 | if (str) { | |
4119 | DPRINT("unknown floppy option [%s]\n", str); | |
4120 | ||
4121 | DPRINT("allowed options are:"); | |
4122 | for (i = 0; i < ARRAY_SIZE(config_params); i++) | |
4123 | printk(" %s", config_params[i].name); | |
4124 | printk("\n"); | |
4125 | } else | |
4126 | DPRINT("botched floppy option\n"); | |
4127 | DPRINT("Read Documentation/floppy.txt\n"); | |
4128 | return 0; | |
4129 | } | |
4130 | ||
4131 | static int have_no_fdc = -ENODEV; | |
4132 | ||
9a8af6b3 AM |
4133 | static ssize_t floppy_cmos_show(struct device *dev, |
4134 | struct device_attribute *attr, char *buf) | |
94fd0db7 | 4135 | { |
9a8af6b3 AM |
4136 | struct platform_device *p; |
4137 | int drive; | |
94fd0db7 | 4138 | |
9a8af6b3 AM |
4139 | p = container_of(dev, struct platform_device,dev); |
4140 | drive = p->id; | |
4141 | return sprintf(buf, "%X\n", UDP->cmos); | |
94fd0db7 | 4142 | } |
94fd0db7 HR |
4143 | DEVICE_ATTR(cmos,S_IRUGO,floppy_cmos_show,NULL); |
4144 | ||
1da177e4 LT |
4145 | static void floppy_device_release(struct device *dev) |
4146 | { | |
4147 | complete(&device_release); | |
4148 | } | |
4149 | ||
94fd0db7 | 4150 | static struct platform_device floppy_device[N_DRIVE]; |
1da177e4 LT |
4151 | |
4152 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
4153 | { | |
4154 | int drive = (*part & 3) | ((*part & 0x80) >> 5); | |
4155 | if (drive >= N_DRIVE || | |
4156 | !(allowed_drive_mask & (1 << drive)) || | |
4157 | fdc_state[FDC(drive)].version == FDC_NONE) | |
4158 | return NULL; | |
945f390f | 4159 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
1da177e4 LT |
4160 | return NULL; |
4161 | *part = 0; | |
4162 | return get_disk(disks[drive]); | |
4163 | } | |
4164 | ||
4165 | static int __init floppy_init(void) | |
4166 | { | |
4167 | int i, unit, drive; | |
4168 | int err, dr; | |
4169 | ||
ef16b519 OH |
4170 | #if defined(CONFIG_PPC_MERGE) |
4171 | if (check_legacy_ioport(FDC1)) | |
4172 | return -ENODEV; | |
4173 | #endif | |
4174 | ||
1da177e4 LT |
4175 | raw_cmd = NULL; |
4176 | ||
4177 | for (dr = 0; dr < N_DRIVE; dr++) { | |
4178 | disks[dr] = alloc_disk(1); | |
4179 | if (!disks[dr]) { | |
4180 | err = -ENOMEM; | |
4181 | goto out_put_disk; | |
4182 | } | |
4183 | ||
4184 | disks[dr]->major = FLOPPY_MAJOR; | |
4185 | disks[dr]->first_minor = TOMINOR(dr); | |
4186 | disks[dr]->fops = &floppy_fops; | |
4187 | sprintf(disks[dr]->disk_name, "fd%d", dr); | |
4188 | ||
4189 | init_timer(&motor_off_timer[dr]); | |
4190 | motor_off_timer[dr].data = dr; | |
4191 | motor_off_timer[dr].function = motor_off_callback; | |
4192 | } | |
4193 | ||
1da177e4 LT |
4194 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4195 | if (err) | |
8ab5e4c1 | 4196 | goto out_put_disk; |
1da177e4 LT |
4197 | |
4198 | floppy_queue = blk_init_queue(do_fd_request, &floppy_lock); | |
4199 | if (!floppy_queue) { | |
4200 | err = -ENOMEM; | |
4201 | goto out_unreg_blkdev; | |
4202 | } | |
4203 | blk_queue_max_sectors(floppy_queue, 64); | |
4204 | ||
4205 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, | |
4206 | floppy_find, NULL, NULL); | |
4207 | ||
4208 | for (i = 0; i < 256; i++) | |
4209 | if (ITYPE(i)) | |
4210 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; | |
4211 | else | |
4212 | floppy_sizes[i] = MAX_DISK_SIZE << 1; | |
4213 | ||
4214 | reschedule_timeout(MAXTIMEOUT, "floppy init", MAXTIMEOUT); | |
4215 | config_types(); | |
4216 | ||
4217 | for (i = 0; i < N_FDC; i++) { | |
4218 | fdc = i; | |
4219 | CLEARSTRUCT(FDCS); | |
4220 | FDCS->dtr = -1; | |
4221 | FDCS->dor = 0x4; | |
4222 | #if defined(__sparc__) || defined(__mc68000__) | |
4223 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ | |
4224 | #ifdef __mc68000__ | |
4225 | if (MACH_IS_SUN3X) | |
4226 | #endif | |
4227 | FDCS->version = FDC_82072A; | |
4228 | #endif | |
4229 | } | |
4230 | ||
4231 | use_virtual_dma = can_use_virtual_dma & 1; | |
1da177e4 LT |
4232 | fdc_state[0].address = FDC1; |
4233 | if (fdc_state[0].address == -1) { | |
4234 | del_timer(&fd_timeout); | |
4235 | err = -ENODEV; | |
4236 | goto out_unreg_region; | |
4237 | } | |
4238 | #if N_FDC > 1 | |
4239 | fdc_state[1].address = FDC2; | |
4240 | #endif | |
4241 | ||
4242 | fdc = 0; /* reset fdc in case of unexpected interrupt */ | |
4243 | err = floppy_grab_irq_and_dma(); | |
4244 | if (err) { | |
4245 | del_timer(&fd_timeout); | |
4246 | err = -EBUSY; | |
4247 | goto out_unreg_region; | |
4248 | } | |
4249 | ||
4250 | /* initialise drive state */ | |
4251 | for (drive = 0; drive < N_DRIVE; drive++) { | |
4252 | CLEARSTRUCT(UDRS); | |
4253 | CLEARSTRUCT(UDRWE); | |
4254 | USETF(FD_DISK_NEWCHANGE); | |
4255 | USETF(FD_DISK_CHANGED); | |
4256 | USETF(FD_VERIFY); | |
4257 | UDRS->fd_device = -1; | |
4258 | floppy_track_buffer = NULL; | |
4259 | max_buffer_sectors = 0; | |
4260 | } | |
4261 | /* | |
4262 | * Small 10 msec delay to let through any interrupt that | |
4263 | * initialization might have triggered, to not | |
4264 | * confuse detection: | |
4265 | */ | |
4266 | msleep(10); | |
4267 | ||
4268 | for (i = 0; i < N_FDC; i++) { | |
4269 | fdc = i; | |
4270 | FDCS->driver_version = FD_DRIVER_VERSION; | |
4271 | for (unit = 0; unit < 4; unit++) | |
4272 | FDCS->track[unit] = 0; | |
4273 | if (FDCS->address == -1) | |
4274 | continue; | |
4275 | FDCS->rawcmd = 2; | |
4276 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) { | |
4277 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
4278 | release_region(FDCS->address + 2, 4); | |
4279 | release_region(FDCS->address + 7, 1); | |
4280 | FDCS->address = -1; | |
4281 | FDCS->version = FDC_NONE; | |
4282 | continue; | |
4283 | } | |
4284 | /* Try to determine the floppy controller type */ | |
4285 | FDCS->version = get_fdc_version(); | |
4286 | if (FDCS->version == FDC_NONE) { | |
4287 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
4288 | release_region(FDCS->address + 2, 4); | |
4289 | release_region(FDCS->address + 7, 1); | |
4290 | FDCS->address = -1; | |
4291 | continue; | |
4292 | } | |
4293 | if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) | |
4294 | can_use_virtual_dma = 0; | |
4295 | ||
4296 | have_no_fdc = 0; | |
4297 | /* Not all FDCs seem to be able to handle the version command | |
4298 | * properly, so force a reset for the standard FDC clones, | |
4299 | * to avoid interrupt garbage. | |
4300 | */ | |
4301 | user_reset_fdc(-1, FD_RESET_ALWAYS, 0); | |
4302 | } | |
4303 | fdc = 0; | |
4304 | del_timer(&fd_timeout); | |
4305 | current_drive = 0; | |
1da177e4 LT |
4306 | initialising = 0; |
4307 | if (have_no_fdc) { | |
4308 | DPRINT("no floppy controllers found\n"); | |
4309 | err = have_no_fdc; | |
4310 | goto out_flush_work; | |
4311 | } | |
4312 | ||
1da177e4 LT |
4313 | for (drive = 0; drive < N_DRIVE; drive++) { |
4314 | if (!(allowed_drive_mask & (1 << drive))) | |
4315 | continue; | |
4316 | if (fdc_state[FDC(drive)].version == FDC_NONE) | |
4317 | continue; | |
94fd0db7 HR |
4318 | |
4319 | floppy_device[drive].name = floppy_device_name; | |
4320 | floppy_device[drive].id = drive; | |
4321 | floppy_device[drive].dev.release = floppy_device_release; | |
4322 | ||
4323 | err = platform_device_register(&floppy_device[drive]); | |
4324 | if (err) | |
4325 | goto out_flush_work; | |
4326 | ||
4ea1b0f4 DM |
4327 | err = device_create_file(&floppy_device[drive].dev,&dev_attr_cmos); |
4328 | if (err) | |
4329 | goto out_unreg_platform_dev; | |
4330 | ||
1da177e4 LT |
4331 | /* to be cleaned up... */ |
4332 | disks[drive]->private_data = (void *)(long)drive; | |
4333 | disks[drive]->queue = floppy_queue; | |
4334 | disks[drive]->flags |= GENHD_FL_REMOVABLE; | |
94fd0db7 | 4335 | disks[drive]->driverfs_dev = &floppy_device[drive].dev; |
1da177e4 LT |
4336 | add_disk(disks[drive]); |
4337 | } | |
4338 | ||
4339 | return 0; | |
4340 | ||
4ea1b0f4 DM |
4341 | out_unreg_platform_dev: |
4342 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 LT |
4343 | out_flush_work: |
4344 | flush_scheduled_work(); | |
4345 | if (usage_count) | |
4346 | floppy_release_irq_and_dma(); | |
4347 | out_unreg_region: | |
4348 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
4349 | blk_cleanup_queue(floppy_queue); | |
4350 | out_unreg_blkdev: | |
4351 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1da177e4 LT |
4352 | out_put_disk: |
4353 | while (dr--) { | |
4354 | del_timer(&motor_off_timer[dr]); | |
4355 | put_disk(disks[dr]); | |
4356 | } | |
4357 | return err; | |
4358 | } | |
4359 | ||
4360 | static DEFINE_SPINLOCK(floppy_usage_lock); | |
4361 | ||
4362 | static int floppy_grab_irq_and_dma(void) | |
4363 | { | |
4364 | unsigned long flags; | |
4365 | ||
4366 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4367 | if (usage_count++) { | |
4368 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4369 | return 0; | |
4370 | } | |
4371 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
6dc659d8 IM |
4372 | |
4373 | /* | |
4374 | * We might have scheduled a free_irq(), wait it to | |
4375 | * drain first: | |
4376 | */ | |
4377 | flush_scheduled_work(); | |
4378 | ||
1da177e4 LT |
4379 | if (fd_request_irq()) { |
4380 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", | |
4381 | FLOPPY_IRQ); | |
4382 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4383 | usage_count--; | |
4384 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4385 | return -1; | |
4386 | } | |
4387 | if (fd_request_dma()) { | |
4388 | DPRINT("Unable to grab DMA%d for the floppy driver\n", | |
4389 | FLOPPY_DMA); | |
2e9c47cd JB |
4390 | if (can_use_virtual_dma & 2) |
4391 | use_virtual_dma = can_use_virtual_dma = 1; | |
4392 | if (!(can_use_virtual_dma & 1)) { | |
4393 | fd_free_irq(); | |
4394 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4395 | usage_count--; | |
4396 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4397 | return -1; | |
4398 | } | |
1da177e4 LT |
4399 | } |
4400 | ||
4401 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4402 | if (FDCS->address != -1) { | |
4403 | if (!request_region(FDCS->address + 2, 4, "floppy")) { | |
4404 | DPRINT("Floppy io-port 0x%04lx in use\n", | |
4405 | FDCS->address + 2); | |
4406 | goto cleanup1; | |
4407 | } | |
4408 | if (!request_region(FDCS->address + 7, 1, "floppy DIR")) { | |
4409 | DPRINT("Floppy io-port 0x%04lx in use\n", | |
4410 | FDCS->address + 7); | |
4411 | goto cleanup2; | |
4412 | } | |
4413 | /* address + 6 is reserved, and may be taken by IDE. | |
4414 | * Unfortunately, Adaptec doesn't know this :-(, */ | |
4415 | } | |
4416 | } | |
4417 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4418 | if (FDCS->address != -1) { | |
4419 | reset_fdc_info(1); | |
4420 | fd_outb(FDCS->dor, FD_DOR); | |
4421 | } | |
4422 | } | |
4423 | fdc = 0; | |
4424 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ | |
4425 | ||
4426 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4427 | if (FDCS->address != -1) | |
4428 | fd_outb(FDCS->dor, FD_DOR); | |
4429 | /* | |
06f748c4 JJ |
4430 | * The driver will try and free resources and relies on us |
4431 | * to know if they were allocated or not. | |
1da177e4 LT |
4432 | */ |
4433 | fdc = 0; | |
4434 | irqdma_allocated = 1; | |
4435 | return 0; | |
4436 | cleanup2: | |
4437 | release_region(FDCS->address + 2, 4); | |
4438 | cleanup1: | |
4439 | fd_free_irq(); | |
4440 | fd_free_dma(); | |
4441 | while (--fdc >= 0) { | |
4442 | release_region(FDCS->address + 2, 4); | |
4443 | release_region(FDCS->address + 7, 1); | |
4444 | } | |
4445 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4446 | usage_count--; | |
4447 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4448 | return -1; | |
4449 | } | |
4450 | ||
4451 | static void floppy_release_irq_and_dma(void) | |
4452 | { | |
4453 | int old_fdc; | |
4454 | #ifdef FLOPPY_SANITY_CHECK | |
4455 | #ifndef __sparc__ | |
4456 | int drive; | |
4457 | #endif | |
4458 | #endif | |
4459 | long tmpsize; | |
4460 | unsigned long tmpaddr; | |
4461 | unsigned long flags; | |
4462 | ||
4463 | spin_lock_irqsave(&floppy_usage_lock, flags); | |
4464 | if (--usage_count) { | |
4465 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4466 | return; | |
4467 | } | |
4468 | spin_unlock_irqrestore(&floppy_usage_lock, flags); | |
4469 | if (irqdma_allocated) { | |
4470 | fd_disable_dma(); | |
4471 | fd_free_dma(); | |
3e541a4a | 4472 | fd_free_irq(); |
1da177e4 LT |
4473 | irqdma_allocated = 0; |
4474 | } | |
4475 | set_dor(0, ~0, 8); | |
4476 | #if N_FDC > 1 | |
4477 | set_dor(1, ~8, 0); | |
4478 | #endif | |
4479 | floppy_enable_hlt(); | |
4480 | ||
4481 | if (floppy_track_buffer && max_buffer_sectors) { | |
4482 | tmpsize = max_buffer_sectors * 1024; | |
4483 | tmpaddr = (unsigned long)floppy_track_buffer; | |
4484 | floppy_track_buffer = NULL; | |
4485 | max_buffer_sectors = 0; | |
4486 | buffer_min = buffer_max = -1; | |
4487 | fd_dma_mem_free(tmpaddr, tmpsize); | |
4488 | } | |
4489 | #ifdef FLOPPY_SANITY_CHECK | |
4490 | #ifndef __sparc__ | |
4491 | for (drive = 0; drive < N_FDC * 4; drive++) | |
4492 | if (timer_pending(motor_off_timer + drive)) | |
4493 | printk("motor off timer %d still active\n", drive); | |
4494 | #endif | |
4495 | ||
4496 | if (timer_pending(&fd_timeout)) | |
4497 | printk("floppy timer still active:%s\n", timeout_message); | |
4498 | if (timer_pending(&fd_timer)) | |
4499 | printk("auxiliary floppy timer still active\n"); | |
365970a1 | 4500 | if (work_pending(&floppy_work)) |
1da177e4 LT |
4501 | printk("work still pending\n"); |
4502 | #endif | |
4503 | old_fdc = fdc; | |
4504 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4505 | if (FDCS->address != -1) { | |
4506 | release_region(FDCS->address + 2, 4); | |
4507 | release_region(FDCS->address + 7, 1); | |
4508 | } | |
4509 | fdc = old_fdc; | |
4510 | } | |
4511 | ||
4512 | #ifdef MODULE | |
4513 | ||
4514 | static char *floppy; | |
4515 | ||
1da177e4 LT |
4516 | static void __init parse_floppy_cfg_string(char *cfg) |
4517 | { | |
4518 | char *ptr; | |
4519 | ||
4520 | while (*cfg) { | |
4521 | for (ptr = cfg; *cfg && *cfg != ' ' && *cfg != '\t'; cfg++) ; | |
4522 | if (*cfg) { | |
4523 | *cfg = '\0'; | |
4524 | cfg++; | |
4525 | } | |
4526 | if (*ptr) | |
4527 | floppy_setup(ptr); | |
4528 | } | |
4529 | } | |
4530 | ||
1efa6469 | 4531 | int __init init_module(void) |
1da177e4 LT |
4532 | { |
4533 | if (floppy) | |
4534 | parse_floppy_cfg_string(floppy); | |
4535 | return floppy_init(); | |
4536 | } | |
4537 | ||
4538 | void cleanup_module(void) | |
4539 | { | |
4540 | int drive; | |
4541 | ||
4542 | init_completion(&device_release); | |
4543 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
4544 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
4545 | ||
4546 | for (drive = 0; drive < N_DRIVE; drive++) { | |
4547 | del_timer_sync(&motor_off_timer[drive]); | |
4548 | ||
4549 | if ((allowed_drive_mask & (1 << drive)) && | |
4550 | fdc_state[FDC(drive)].version != FDC_NONE) { | |
4551 | del_gendisk(disks[drive]); | |
94fd0db7 HR |
4552 | device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); |
4553 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 LT |
4554 | } |
4555 | put_disk(disks[drive]); | |
4556 | } | |
1da177e4 LT |
4557 | |
4558 | del_timer_sync(&fd_timeout); | |
4559 | del_timer_sync(&fd_timer); | |
4560 | blk_cleanup_queue(floppy_queue); | |
4561 | ||
4562 | if (usage_count) | |
4563 | floppy_release_irq_and_dma(); | |
4564 | ||
4565 | /* eject disk, if any */ | |
4566 | fd_eject(0); | |
4567 | ||
4568 | wait_for_completion(&device_release); | |
4569 | } | |
4570 | ||
4571 | module_param(floppy, charp, 0); | |
4572 | module_param(FLOPPY_IRQ, int, 0); | |
4573 | module_param(FLOPPY_DMA, int, 0); | |
4574 | MODULE_AUTHOR("Alain L. Knaff"); | |
4575 | MODULE_SUPPORTED_DEVICE("fd"); | |
4576 | MODULE_LICENSE("GPL"); | |
4577 | ||
4578 | #else | |
4579 | ||
4580 | __setup("floppy=", floppy_setup); | |
4581 | module_init(floppy_init) | |
4582 | #endif | |
4583 | ||
4584 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |