Commit | Line | Data |
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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * linux/drivers/block/floppy.c | |
4 | * | |
5 | * Copyright (C) 1991, 1992 Linus Torvalds | |
6 | * Copyright (C) 1993, 1994 Alain Knaff | |
7 | * Copyright (C) 1998 Alan Cox | |
8 | */ | |
06f748c4 | 9 | |
1da177e4 LT |
10 | /* |
11 | * 02.12.91 - Changed to static variables to indicate need for reset | |
12 | * and recalibrate. This makes some things easier (output_byte reset | |
13 | * checking etc), and means less interrupt jumping in case of errors, | |
14 | * so the code is hopefully easier to understand. | |
15 | */ | |
16 | ||
17 | /* | |
18 | * This file is certainly a mess. I've tried my best to get it working, | |
19 | * but I don't like programming floppies, and I have only one anyway. | |
20 | * Urgel. I should check for more errors, and do more graceful error | |
21 | * recovery. Seems there are problems with several drives. I've tried to | |
22 | * correct them. No promises. | |
23 | */ | |
24 | ||
25 | /* | |
26 | * As with hd.c, all routines within this file can (and will) be called | |
27 | * by interrupts, so extreme caution is needed. A hardware interrupt | |
28 | * handler may not sleep, or a kernel panic will happen. Thus I cannot | |
29 | * call "floppy-on" directly, but have to set a special timer interrupt | |
30 | * etc. | |
31 | */ | |
32 | ||
33 | /* | |
34 | * 28.02.92 - made track-buffering routines, based on the routines written | |
35 | * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. | |
36 | */ | |
37 | ||
38 | /* | |
39 | * Automatic floppy-detection and formatting written by Werner Almesberger | |
40 | * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with | |
41 | * the floppy-change signal detection. | |
42 | */ | |
43 | ||
44 | /* | |
45 | * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed | |
46 | * FDC data overrun bug, added some preliminary stuff for vertical | |
47 | * recording support. | |
48 | * | |
49 | * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. | |
50 | * | |
51 | * TODO: Errors are still not counted properly. | |
52 | */ | |
53 | ||
54 | /* 1992/9/20 | |
55 | * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) | |
56 | * modeled after the freeware MS-DOS program fdformat/88 V1.8 by | |
57 | * Christoph H. Hochst\"atter. | |
58 | * I have fixed the shift values to the ones I always use. Maybe a new | |
59 | * ioctl() should be created to be able to modify them. | |
60 | * There is a bug in the driver that makes it impossible to format a | |
61 | * floppy as the first thing after bootup. | |
62 | */ | |
63 | ||
64 | /* | |
65 | * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and | |
66 | * this helped the floppy driver as well. Much cleaner, and still seems to | |
67 | * work. | |
68 | */ | |
69 | ||
70 | /* 1994/6/24 --bbroad-- added the floppy table entries and made | |
71 | * minor modifications to allow 2.88 floppies to be run. | |
72 | */ | |
73 | ||
74 | /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more | |
75 | * disk types. | |
76 | */ | |
77 | ||
78 | /* | |
79 | * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger | |
80 | * format bug fixes, but unfortunately some new bugs too... | |
81 | */ | |
82 | ||
83 | /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write | |
84 | * errors to allow safe writing by specialized programs. | |
85 | */ | |
86 | ||
87 | /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks | |
88 | * by defining bit 1 of the "stretch" parameter to mean put sectors on the | |
89 | * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's | |
90 | * drives are "upside-down"). | |
91 | */ | |
92 | ||
93 | /* | |
94 | * 1995/8/26 -- Andreas Busse -- added Mips support. | |
95 | */ | |
96 | ||
97 | /* | |
98 | * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent | |
99 | * features to asm/floppy.h. | |
100 | */ | |
101 | ||
b88b0985 JN |
102 | /* |
103 | * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support | |
104 | */ | |
105 | ||
1da177e4 LT |
106 | /* |
107 | * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of | |
108 | * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & | |
109 | * use of '0' for NULL. | |
110 | */ | |
111 | ||
112 | /* | |
113 | * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation | |
114 | * failures. | |
115 | */ | |
116 | ||
117 | /* | |
118 | * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. | |
119 | */ | |
120 | ||
121 | /* | |
122 | * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 | |
123 | * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were | |
124 | * being used to store jiffies, which are unsigned longs). | |
125 | */ | |
126 | ||
127 | /* | |
128 | * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
129 | * - get rid of check_region | |
130 | * - s/suser/capable/ | |
131 | */ | |
132 | ||
133 | /* | |
134 | * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no | |
135 | * floppy controller (lingering task on list after module is gone... boom.) | |
136 | */ | |
137 | ||
138 | /* | |
139 | * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range | |
140 | * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix | |
141 | * requires many non-obvious changes in arch dependent code. | |
142 | */ | |
143 | ||
144 | /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. | |
145 | * Better audit of register_blkdev. | |
146 | */ | |
147 | ||
1da177e4 LT |
148 | #undef FLOPPY_SILENT_DCL_CLEAR |
149 | ||
150 | #define REALLY_SLOW_IO | |
151 | ||
152 | #define DEBUGT 2 | |
1da177e4 | 153 | |
891eda80 JP |
154 | #define DPRINT(format, args...) \ |
155 | pr_info("floppy%d: " format, current_drive, ##args) | |
156 | ||
157 | #define DCL_DEBUG /* debug disk change line */ | |
87f530d8 JP |
158 | #ifdef DCL_DEBUG |
159 | #define debug_dcl(test, fmt, args...) \ | |
160 | do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0) | |
161 | #else | |
162 | #define debug_dcl(test, fmt, args...) \ | |
163 | do { if (0) DPRINT(fmt, ##args); } while (0) | |
164 | #endif | |
165 | ||
1da177e4 LT |
166 | /* do print messages for unexpected interrupts */ |
167 | static int print_unex = 1; | |
168 | #include <linux/module.h> | |
169 | #include <linux/sched.h> | |
170 | #include <linux/fs.h> | |
171 | #include <linux/kernel.h> | |
172 | #include <linux/timer.h> | |
173 | #include <linux/workqueue.h> | |
174 | #define FDPATCHES | |
175 | #include <linux/fdreg.h> | |
1da177e4 LT |
176 | #include <linux/fd.h> |
177 | #include <linux/hdreg.h> | |
1da177e4 LT |
178 | #include <linux/errno.h> |
179 | #include <linux/slab.h> | |
180 | #include <linux/mm.h> | |
181 | #include <linux/bio.h> | |
182 | #include <linux/string.h> | |
50297cbf | 183 | #include <linux/jiffies.h> |
1da177e4 LT |
184 | #include <linux/fcntl.h> |
185 | #include <linux/delay.h> | |
186 | #include <linux/mc146818rtc.h> /* CMOS defines */ | |
187 | #include <linux/ioport.h> | |
188 | #include <linux/interrupt.h> | |
189 | #include <linux/init.h> | |
d052d1be | 190 | #include <linux/platform_device.h> |
83f9ef46 | 191 | #include <linux/mod_devicetable.h> |
b1c82b5c | 192 | #include <linux/mutex.h> |
d4937543 JP |
193 | #include <linux/io.h> |
194 | #include <linux/uaccess.h> | |
0cc15d03 | 195 | #include <linux/async.h> |
229b53c9 | 196 | #include <linux/compat.h> |
1da177e4 LT |
197 | |
198 | /* | |
199 | * PS/2 floppies have much slower step rates than regular floppies. | |
200 | * It's been recommended that take about 1/4 of the default speed | |
201 | * in some more extreme cases. | |
202 | */ | |
2a48fc0a | 203 | static DEFINE_MUTEX(floppy_mutex); |
1da177e4 LT |
204 | static int slow_floppy; |
205 | ||
206 | #include <asm/dma.h> | |
207 | #include <asm/irq.h> | |
1da177e4 LT |
208 | |
209 | static int FLOPPY_IRQ = 6; | |
210 | static int FLOPPY_DMA = 2; | |
211 | static int can_use_virtual_dma = 2; | |
212 | /* ======= | |
213 | * can use virtual DMA: | |
214 | * 0 = use of virtual DMA disallowed by config | |
215 | * 1 = use of virtual DMA prescribed by config | |
216 | * 2 = no virtual DMA preference configured. By default try hard DMA, | |
217 | * but fall back on virtual DMA when not enough memory available | |
218 | */ | |
219 | ||
220 | static int use_virtual_dma; | |
221 | /* ======= | |
222 | * use virtual DMA | |
223 | * 0 using hard DMA | |
224 | * 1 using virtual DMA | |
225 | * This variable is set to virtual when a DMA mem problem arises, and | |
226 | * reset back in floppy_grab_irq_and_dma. | |
227 | * It is not safe to reset it in other circumstances, because the floppy | |
228 | * driver may have several buffers in use at once, and we do currently not | |
229 | * record each buffers capabilities | |
230 | */ | |
231 | ||
232 | static DEFINE_SPINLOCK(floppy_lock); | |
1da177e4 LT |
233 | |
234 | static unsigned short virtual_dma_port = 0x3f0; | |
7d12e780 | 235 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 | 236 | static int set_dor(int fdc, char mask, char data); |
1da177e4 LT |
237 | |
238 | #define K_64 0x10000 /* 64KB */ | |
239 | ||
240 | /* the following is the mask of allowed drives. By default units 2 and | |
241 | * 3 of both floppy controllers are disabled, because switching on the | |
242 | * motor of these drives causes system hangs on some PCI computers. drive | |
243 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if | |
244 | * a drive is allowed. | |
245 | * | |
246 | * NOTE: This must come before we include the arch floppy header because | |
247 | * some ports reference this variable from there. -DaveM | |
248 | */ | |
249 | ||
250 | static int allowed_drive_mask = 0x33; | |
251 | ||
252 | #include <asm/floppy.h> | |
253 | ||
254 | static int irqdma_allocated; | |
255 | ||
a9f38e1d | 256 | #include <linux/blk-mq.h> |
1da177e4 LT |
257 | #include <linux/blkpg.h> |
258 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ | |
259 | #include <linux/completion.h> | |
260 | ||
a9f38e1d | 261 | static LIST_HEAD(floppy_reqs); |
1da177e4 | 262 | static struct request *current_req; |
48821184 | 263 | static int set_next_request(void); |
1da177e4 LT |
264 | |
265 | #ifndef fd_get_dma_residue | |
266 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) | |
267 | #endif | |
268 | ||
269 | /* Dma Memory related stuff */ | |
270 | ||
271 | #ifndef fd_dma_mem_free | |
272 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) | |
273 | #endif | |
274 | ||
275 | #ifndef fd_dma_mem_alloc | |
48c8cee6 | 276 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) |
1da177e4 LT |
277 | #endif |
278 | ||
acfef4f1 CH |
279 | #ifndef fd_cacheflush |
280 | #define fd_cacheflush(addr, size) /* nothing... */ | |
281 | #endif | |
282 | ||
1da177e4 LT |
283 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) |
284 | { | |
285 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA | |
286 | if (*addr) | |
287 | return; /* we have the memory */ | |
288 | if (can_use_virtual_dma != 2) | |
289 | return; /* no fallback allowed */ | |
b46df356 | 290 | pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
1da177e4 LT |
291 | *addr = (char *)nodma_mem_alloc(l); |
292 | #else | |
293 | return; | |
294 | #endif | |
295 | } | |
296 | ||
297 | /* End dma memory related stuff */ | |
298 | ||
299 | static unsigned long fake_change; | |
29f1c784 | 300 | static bool initialized; |
1da177e4 | 301 | |
48c8cee6 JP |
302 | #define ITYPE(x) (((x) >> 2) & 0x1f) |
303 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) | |
304 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ | |
305 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ | |
06f748c4 | 306 | /* reverse mapping from unit and fdc to drive */ |
1da177e4 | 307 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
1da177e4 | 308 | |
48c8cee6 JP |
309 | #define DRS (&drive_state[current_drive]) |
310 | #define DRWE (&write_errors[current_drive]) | |
1da177e4 | 311 | |
48c8cee6 JP |
312 | #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) |
313 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) | |
314 | ||
1da177e4 | 315 | /* read/write */ |
48c8cee6 JP |
316 | #define COMMAND (raw_cmd->cmd[0]) |
317 | #define DR_SELECT (raw_cmd->cmd[1]) | |
318 | #define TRACK (raw_cmd->cmd[2]) | |
319 | #define HEAD (raw_cmd->cmd[3]) | |
320 | #define SECTOR (raw_cmd->cmd[4]) | |
321 | #define SIZECODE (raw_cmd->cmd[5]) | |
322 | #define SECT_PER_TRACK (raw_cmd->cmd[6]) | |
323 | #define GAP (raw_cmd->cmd[7]) | |
324 | #define SIZECODE2 (raw_cmd->cmd[8]) | |
1da177e4 LT |
325 | #define NR_RW 9 |
326 | ||
327 | /* format */ | |
48c8cee6 JP |
328 | #define F_SIZECODE (raw_cmd->cmd[2]) |
329 | #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) | |
330 | #define F_GAP (raw_cmd->cmd[4]) | |
331 | #define F_FILL (raw_cmd->cmd[5]) | |
1da177e4 LT |
332 | #define NR_F 6 |
333 | ||
334 | /* | |
48c8cee6 JP |
335 | * Maximum disk size (in kilobytes). |
336 | * This default is used whenever the current disk size is unknown. | |
1da177e4 LT |
337 | * [Now it is rather a minimum] |
338 | */ | |
339 | #define MAX_DISK_SIZE 4 /* 3984 */ | |
340 | ||
341 | /* | |
342 | * globals used by 'result()' | |
343 | */ | |
344 | #define MAX_REPLIES 16 | |
345 | static unsigned char reply_buffer[MAX_REPLIES]; | |
891eda80 | 346 | static int inr; /* size of reply buffer, when called from interrupt */ |
48c8cee6 JP |
347 | #define ST0 (reply_buffer[0]) |
348 | #define ST1 (reply_buffer[1]) | |
349 | #define ST2 (reply_buffer[2]) | |
350 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ | |
351 | #define R_TRACK (reply_buffer[3]) | |
352 | #define R_HEAD (reply_buffer[4]) | |
353 | #define R_SECTOR (reply_buffer[5]) | |
354 | #define R_SIZECODE (reply_buffer[6]) | |
355 | ||
356 | #define SEL_DLY (2 * HZ / 100) | |
1da177e4 LT |
357 | |
358 | /* | |
359 | * this struct defines the different floppy drive types. | |
360 | */ | |
361 | static struct { | |
362 | struct floppy_drive_params params; | |
363 | const char *name; /* name printed while booting */ | |
364 | } default_drive_params[] = { | |
365 | /* NOTE: the time values in jiffies should be in msec! | |
366 | CMOS drive type | |
367 | | Maximum data rate supported by drive type | |
368 | | | Head load time, msec | |
369 | | | | Head unload time, msec (not used) | |
370 | | | | | Step rate interval, usec | |
371 | | | | | | Time needed for spinup time (jiffies) | |
372 | | | | | | | Timeout for spinning down (jiffies) | |
373 | | | | | | | | Spindown offset (where disk stops) | |
374 | | | | | | | | | Select delay | |
375 | | | | | | | | | | RPS | |
376 | | | | | | | | | | | Max number of tracks | |
377 | | | | | | | | | | | | Interrupt timeout | |
378 | | | | | | | | | | | | | Max nonintlv. sectors | |
379 | | | | | | | | | | | | | | -Max Errors- flags */ | |
380 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, | |
381 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, | |
382 | ||
383 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, | |
384 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ | |
385 | ||
386 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, | |
387 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ | |
388 | ||
389 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
390 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ | |
391 | ||
392 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
393 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ | |
394 | ||
395 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
396 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ | |
397 | ||
398 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
399 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ | |
400 | /* | --autodetected formats--- | | | | |
401 | * read_track | | Name printed when booting | |
402 | * | Native format | |
403 | * Frequency of disk change checks */ | |
404 | }; | |
405 | ||
406 | static struct floppy_drive_params drive_params[N_DRIVE]; | |
407 | static struct floppy_drive_struct drive_state[N_DRIVE]; | |
408 | static struct floppy_write_errors write_errors[N_DRIVE]; | |
409 | static struct timer_list motor_off_timer[N_DRIVE]; | |
410 | static struct gendisk *disks[N_DRIVE]; | |
a9f38e1d | 411 | static struct blk_mq_tag_set tag_sets[N_DRIVE]; |
1da177e4 | 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 | |
9e49184c KW |
427 | * 'options'. |
428 | * | |
429 | * Bits 2 through 9 of 'stretch' tell the number of the first sector. | |
430 | * The LSB (bit 2) is flipped. For most disks, the first sector | |
431 | * is 1 (represented by 0x00<<2). For some CP/M and music sampler | |
432 | * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). | |
433 | * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). | |
434 | * | |
435 | * Other parameters should be self-explanatory (see also setfdprm(8)). | |
1da177e4 LT |
436 | */ |
437 | /* | |
438 | Size | |
439 | | Sectors per track | |
440 | | | Head | |
441 | | | | Tracks | |
442 | | | | | Stretch | |
443 | | | | | | Gap 1 size | |
444 | | | | | | | Data rate, | 0x40 for perp | |
445 | | | | | | | | Spec1 (stepping rate, head unload | |
446 | | | | | | | | | /fmt gap (gap2) */ | |
447 | static struct floppy_struct floppy_type[32] = { | |
448 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ | |
449 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ | |
450 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ | |
451 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ | |
452 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ | |
453 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ | |
454 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ | |
455 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ | |
456 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ | |
457 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ | |
458 | ||
459 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ | |
460 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ | |
461 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ | |
462 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ | |
463 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ | |
464 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ | |
465 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ | |
466 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ | |
467 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ | |
468 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ | |
469 | ||
470 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ | |
471 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ | |
472 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ | |
473 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ | |
474 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ | |
475 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ | |
476 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ | |
477 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ | |
478 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ | |
1da177e4 | 479 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
06f748c4 | 480 | |
1da177e4 LT |
481 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
482 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ | |
483 | }; | |
484 | ||
1da177e4 LT |
485 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
486 | ||
487 | /* Auto-detection: Disk type used until the next media change occurs. */ | |
488 | static struct floppy_struct *current_type[N_DRIVE]; | |
489 | ||
490 | /* | |
491 | * User-provided type information. current_type points to | |
492 | * the respective entry of this array. | |
493 | */ | |
494 | static struct floppy_struct user_params[N_DRIVE]; | |
495 | ||
496 | static sector_t floppy_sizes[256]; | |
497 | ||
94fd0db7 HR |
498 | static char floppy_device_name[] = "floppy"; |
499 | ||
1da177e4 LT |
500 | /* |
501 | * The driver is trying to determine the correct media format | |
502 | * while probing is set. rw_interrupt() clears it after a | |
503 | * successful access. | |
504 | */ | |
505 | static int probing; | |
506 | ||
507 | /* Synchronization of FDC access. */ | |
48c8cee6 JP |
508 | #define FD_COMMAND_NONE -1 |
509 | #define FD_COMMAND_ERROR 2 | |
510 | #define FD_COMMAND_OKAY 3 | |
1da177e4 LT |
511 | |
512 | static volatile int command_status = FD_COMMAND_NONE; | |
513 | static unsigned long fdc_busy; | |
514 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
515 | static DECLARE_WAIT_QUEUE_HEAD(command_done); | |
516 | ||
1da177e4 LT |
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); |
3b06c21e | 540 | static const struct cont_t { |
48c8cee6 JP |
541 | void (*interrupt)(void); |
542 | /* this is called after the interrupt of the | |
543 | * main command */ | |
06f748c4 JJ |
544 | void (*redo)(void); /* this is called to retry the operation */ |
545 | void (*error)(void); /* this is called to tally an error */ | |
1da177e4 LT |
546 | done_f done; /* this is called to say if the operation has |
547 | * succeeded/failed */ | |
548 | } *cont; | |
549 | ||
550 | static void floppy_ready(void); | |
551 | static void floppy_start(void); | |
552 | static void process_fd_request(void); | |
553 | static void recalibrate_floppy(void); | |
070ad7e7 | 554 | static void floppy_shutdown(struct work_struct *); |
1da177e4 | 555 | |
5a74db06 PDM |
556 | static int floppy_request_regions(int); |
557 | static void floppy_release_regions(int); | |
1da177e4 LT |
558 | static int floppy_grab_irq_and_dma(void); |
559 | static void floppy_release_irq_and_dma(void); | |
560 | ||
561 | /* | |
562 | * The "reset" variable should be tested whenever an interrupt is scheduled, | |
563 | * after the commands have been sent. This is to ensure that the driver doesn't | |
564 | * get wedged when the interrupt doesn't come because of a failed command. | |
565 | * reset doesn't need to be tested before sending commands, because | |
566 | * output_byte is automatically disabled when reset is set. | |
567 | */ | |
1da177e4 LT |
568 | static void reset_fdc(void); |
569 | ||
570 | /* | |
571 | * These are global variables, as that's the easiest way to give | |
572 | * information to interrupts. They are the data used for the current | |
573 | * request. | |
574 | */ | |
48c8cee6 JP |
575 | #define NO_TRACK -1 |
576 | #define NEED_1_RECAL -2 | |
577 | #define NEED_2_RECAL -3 | |
1da177e4 | 578 | |
575cfc67 | 579 | static atomic_t usage_count = ATOMIC_INIT(0); |
1da177e4 LT |
580 | |
581 | /* buffer related variables */ | |
582 | static int buffer_track = -1; | |
583 | static int buffer_drive = -1; | |
584 | static int buffer_min = -1; | |
585 | static int buffer_max = -1; | |
586 | ||
587 | /* fdc related variables, should end up in a struct */ | |
588 | static struct floppy_fdc_state fdc_state[N_FDC]; | |
589 | static int fdc; /* current fdc */ | |
590 | ||
070ad7e7 JK |
591 | static struct workqueue_struct *floppy_wq; |
592 | ||
1da177e4 LT |
593 | static struct floppy_struct *_floppy = floppy_type; |
594 | static unsigned char current_drive; | |
595 | static long current_count_sectors; | |
596 | static unsigned char fsector_t; /* sector in track */ | |
597 | static unsigned char in_sector_offset; /* offset within physical sector, | |
598 | * expressed in units of 512 bytes */ | |
599 | ||
2b51dca7 PE |
600 | static inline bool drive_no_geom(int drive) |
601 | { | |
8d9d34e2 | 602 | return !current_type[drive] && !ITYPE(drive_state[drive].fd_device); |
2b51dca7 PE |
603 | } |
604 | ||
1da177e4 LT |
605 | #ifndef fd_eject |
606 | static inline int fd_eject(int drive) | |
607 | { | |
608 | return -EINVAL; | |
609 | } | |
610 | #endif | |
611 | ||
612 | /* | |
613 | * Debugging | |
614 | * ========= | |
615 | */ | |
616 | #ifdef DEBUGT | |
617 | static long unsigned debugtimer; | |
618 | ||
619 | static inline void set_debugt(void) | |
620 | { | |
621 | debugtimer = jiffies; | |
622 | } | |
623 | ||
ded2863d | 624 | static inline void debugt(const char *func, const char *msg) |
1da177e4 | 625 | { |
031faabd | 626 | if (drive_params[current_drive].flags & DEBUGT) |
ded2863d | 627 | pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); |
1da177e4 LT |
628 | } |
629 | #else | |
630 | static inline void set_debugt(void) { } | |
ded2863d | 631 | static inline void debugt(const char *func, const char *msg) { } |
1da177e4 LT |
632 | #endif /* DEBUGT */ |
633 | ||
1da177e4 | 634 | |
070ad7e7 | 635 | static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown); |
1da177e4 LT |
636 | static const char *timeout_message; |
637 | ||
275176bc | 638 | static void is_alive(const char *func, const char *message) |
1da177e4 LT |
639 | { |
640 | /* this routine checks whether the floppy driver is "alive" */ | |
c529730a | 641 | if (test_bit(0, &fdc_busy) && command_status < 2 && |
070ad7e7 | 642 | !delayed_work_pending(&fd_timeout)) { |
275176bc | 643 | DPRINT("%s: timeout handler died. %s\n", func, message); |
1da177e4 LT |
644 | } |
645 | } | |
1da177e4 | 646 | |
48c8cee6 | 647 | static void (*do_floppy)(void) = NULL; |
1da177e4 | 648 | |
1da177e4 LT |
649 | #define OLOGSIZE 20 |
650 | ||
48c8cee6 | 651 | static void (*lasthandler)(void); |
1da177e4 LT |
652 | static unsigned long interruptjiffies; |
653 | static unsigned long resultjiffies; | |
654 | static int resultsize; | |
655 | static unsigned long lastredo; | |
656 | ||
657 | static struct output_log { | |
658 | unsigned char data; | |
659 | unsigned char status; | |
660 | unsigned long jiffies; | |
661 | } output_log[OLOGSIZE]; | |
662 | ||
663 | static int output_log_pos; | |
1da177e4 LT |
664 | |
665 | #define current_reqD -1 | |
666 | #define MAXTIMEOUT -2 | |
667 | ||
73507e6c | 668 | static void __reschedule_timeout(int drive, const char *message) |
1da177e4 | 669 | { |
070ad7e7 JK |
670 | unsigned long delay; |
671 | ||
1da177e4 LT |
672 | if (drive == current_reqD) |
673 | drive = current_drive; | |
070ad7e7 | 674 | |
4acb3e2f | 675 | if (drive < 0 || drive >= N_DRIVE) { |
070ad7e7 | 676 | delay = 20UL * HZ; |
1da177e4 LT |
677 | drive = 0; |
678 | } else | |
1ce9ae96 | 679 | delay = drive_params[drive].timeout; |
070ad7e7 | 680 | |
e7c2f967 | 681 | mod_delayed_work(floppy_wq, &fd_timeout, delay); |
1ce9ae96 | 682 | if (drive_params[drive].flags & FD_DEBUG) |
73507e6c | 683 | DPRINT("reschedule timeout %s\n", message); |
1da177e4 LT |
684 | timeout_message = message; |
685 | } | |
686 | ||
73507e6c | 687 | static void reschedule_timeout(int drive, const char *message) |
1da177e4 LT |
688 | { |
689 | unsigned long flags; | |
690 | ||
691 | spin_lock_irqsave(&floppy_lock, flags); | |
73507e6c | 692 | __reschedule_timeout(drive, message); |
1da177e4 LT |
693 | spin_unlock_irqrestore(&floppy_lock, flags); |
694 | } | |
695 | ||
48c8cee6 JP |
696 | #define INFBOUND(a, b) (a) = max_t(int, a, b) |
697 | #define SUPBOUND(a, b) (a) = min_t(int, a, b) | |
1da177e4 LT |
698 | |
699 | /* | |
700 | * Bottom half floppy driver. | |
701 | * ========================== | |
702 | * | |
703 | * This part of the file contains the code talking directly to the hardware, | |
704 | * and also the main service loop (seek-configure-spinup-command) | |
705 | */ | |
706 | ||
707 | /* | |
708 | * disk change. | |
709 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, | |
710 | * and the last_checked date. | |
711 | * | |
712 | * last_checked is the date of the last check which showed 'no disk change' | |
713 | * FD_DISK_CHANGE is set under two conditions: | |
714 | * 1. The floppy has been changed after some i/o to that floppy already | |
715 | * took place. | |
716 | * 2. No floppy disk is in the drive. This is done in order to ensure that | |
717 | * requests are quickly flushed in case there is no disk in the drive. It | |
718 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in | |
719 | * the drive. | |
720 | * | |
721 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. | |
722 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on | |
723 | * each seek. If a disk is present, the disk change line should also be | |
724 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk | |
725 | * change line is set, this means either that no disk is in the drive, or | |
726 | * that it has been removed since the last seek. | |
727 | * | |
728 | * This means that we really have a third possibility too: | |
729 | * The floppy has been changed after the last seek. | |
730 | */ | |
731 | ||
732 | static int disk_change(int drive) | |
733 | { | |
734 | int fdc = FDC(drive); | |
06f748c4 | 735 | |
8d9d34e2 | 736 | if (time_before(jiffies, drive_state[drive].select_date + drive_params[drive].select_delay)) |
1da177e4 | 737 | DPRINT("WARNING disk change called early\n"); |
de6048b8 WT |
738 | if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive))) || |
739 | (fdc_state[fdc].dor & 3) != UNIT(drive) || fdc != FDC(drive)) { | |
1da177e4 LT |
740 | DPRINT("probing disk change on unselected drive\n"); |
741 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), | |
de6048b8 | 742 | (unsigned int)fdc_state[fdc].dor); |
1da177e4 | 743 | } |
1da177e4 | 744 | |
1ce9ae96 | 745 | debug_dcl(drive_params[drive].flags, |
87f530d8 | 746 | "checking disk change line for drive %d\n", drive); |
1ce9ae96 WT |
747 | debug_dcl(drive_params[drive].flags, "jiffies=%lu\n", jiffies); |
748 | debug_dcl(drive_params[drive].flags, "disk change line=%x\n", | |
749 | fd_inb(FD_DIR) & 0x80); | |
8d9d34e2 WT |
750 | debug_dcl(drive_params[drive].flags, "flags=%lx\n", |
751 | drive_state[drive].flags); | |
87f530d8 | 752 | |
1ce9ae96 | 753 | if (drive_params[drive].flags & FD_BROKEN_DCL) |
8d9d34e2 WT |
754 | return test_bit(FD_DISK_CHANGED_BIT, |
755 | &drive_state[drive].flags); | |
1ce9ae96 | 756 | if ((fd_inb(FD_DIR) ^ drive_params[drive].flags) & 0x80) { |
8d9d34e2 | 757 | set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); |
e0298536 JP |
758 | /* verify write protection */ |
759 | ||
8d9d34e2 WT |
760 | if (drive_state[drive].maxblock) /* mark it changed */ |
761 | set_bit(FD_DISK_CHANGED_BIT, | |
762 | &drive_state[drive].flags); | |
1da177e4 LT |
763 | |
764 | /* invalidate its geometry */ | |
8d9d34e2 | 765 | if (drive_state[drive].keep_data >= 0) { |
1ce9ae96 | 766 | if ((drive_params[drive].flags & FTD_MSG) && |
1da177e4 | 767 | current_type[drive] != NULL) |
891eda80 | 768 | DPRINT("Disk type is undefined after disk change\n"); |
1da177e4 LT |
769 | current_type[drive] = NULL; |
770 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; | |
771 | } | |
772 | ||
1da177e4 LT |
773 | return 1; |
774 | } else { | |
8d9d34e2 WT |
775 | drive_state[drive].last_checked = jiffies; |
776 | clear_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags); | |
1da177e4 LT |
777 | } |
778 | return 0; | |
779 | } | |
780 | ||
781 | static inline int is_selected(int dor, int unit) | |
782 | { | |
783 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); | |
784 | } | |
785 | ||
57584c5a JP |
786 | static bool is_ready_state(int status) |
787 | { | |
788 | int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); | |
789 | return state == STATUS_READY; | |
790 | } | |
791 | ||
1da177e4 LT |
792 | static int set_dor(int fdc, char mask, char data) |
793 | { | |
fdc1ca8a JJ |
794 | unsigned char unit; |
795 | unsigned char drive; | |
796 | unsigned char newdor; | |
797 | unsigned char olddor; | |
1da177e4 | 798 | |
de6048b8 | 799 | if (fdc_state[fdc].address == -1) |
1da177e4 LT |
800 | return -1; |
801 | ||
de6048b8 | 802 | olddor = fdc_state[fdc].dor; |
1da177e4 LT |
803 | newdor = (olddor & mask) | data; |
804 | if (newdor != olddor) { | |
805 | unit = olddor & 0x3; | |
806 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { | |
807 | drive = REVDRIVE(fdc, unit); | |
1ce9ae96 | 808 | debug_dcl(drive_params[drive].flags, |
87f530d8 | 809 | "calling disk change from set_dor\n"); |
1da177e4 LT |
810 | disk_change(drive); |
811 | } | |
de6048b8 | 812 | fdc_state[fdc].dor = newdor; |
1da177e4 LT |
813 | fd_outb(newdor, FD_DOR); |
814 | ||
815 | unit = newdor & 0x3; | |
816 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { | |
817 | drive = REVDRIVE(fdc, unit); | |
8d9d34e2 | 818 | drive_state[drive].select_date = jiffies; |
1da177e4 LT |
819 | } |
820 | } | |
1da177e4 LT |
821 | return olddor; |
822 | } | |
823 | ||
824 | static void twaddle(void) | |
825 | { | |
031faabd | 826 | if (drive_params[current_drive].select_delay) |
1da177e4 | 827 | return; |
de6048b8 WT |
828 | fd_outb(fdc_state[fdc].dor & ~(0x10 << UNIT(current_drive)), FD_DOR); |
829 | fd_outb(fdc_state[fdc].dor, FD_DOR); | |
1da177e4 LT |
830 | DRS->select_date = jiffies; |
831 | } | |
832 | ||
57584c5a JP |
833 | /* |
834 | * Reset all driver information about the current fdc. | |
835 | * This is needed after a reset, and after a raw command. | |
836 | */ | |
1da177e4 LT |
837 | static void reset_fdc_info(int mode) |
838 | { | |
839 | int drive; | |
840 | ||
de6048b8 WT |
841 | fdc_state[fdc].spec1 = fdc_state[fdc].spec2 = -1; |
842 | fdc_state[fdc].need_configure = 1; | |
843 | fdc_state[fdc].perp_mode = 1; | |
844 | fdc_state[fdc].rawcmd = 0; | |
1da177e4 | 845 | for (drive = 0; drive < N_DRIVE; drive++) |
8d9d34e2 WT |
846 | if (FDC(drive) == fdc && (mode || drive_state[drive].track != NEED_1_RECAL)) |
847 | drive_state[drive].track = NEED_2_RECAL; | |
1da177e4 LT |
848 | } |
849 | ||
850 | /* selects the fdc and drive, and enables the fdc's input/dma. */ | |
851 | static void set_fdc(int drive) | |
852 | { | |
2e90ca68 LT |
853 | unsigned int new_fdc = fdc; |
854 | ||
1da177e4 | 855 | if (drive >= 0 && drive < N_DRIVE) { |
2e90ca68 | 856 | new_fdc = FDC(drive); |
1da177e4 LT |
857 | current_drive = drive; |
858 | } | |
2e90ca68 | 859 | if (new_fdc >= N_FDC) { |
b46df356 | 860 | pr_info("bad fdc value\n"); |
1da177e4 LT |
861 | return; |
862 | } | |
2e90ca68 | 863 | fdc = new_fdc; |
1da177e4 LT |
864 | set_dor(fdc, ~0, 8); |
865 | #if N_FDC > 1 | |
866 | set_dor(1 - fdc, ~8, 0); | |
867 | #endif | |
de6048b8 | 868 | if (fdc_state[fdc].rawcmd == 2) |
1da177e4 LT |
869 | reset_fdc_info(1); |
870 | if (fd_inb(FD_STATUS) != STATUS_READY) | |
de6048b8 | 871 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
872 | } |
873 | ||
874 | /* locks the driver */ | |
a0c80efe | 875 | static int lock_fdc(int drive) |
1da177e4 | 876 | { |
b862f26f SH |
877 | if (WARN(atomic_read(&usage_count) == 0, |
878 | "Trying to lock fdc while usage count=0\n")) | |
1da177e4 | 879 | return -1; |
1da177e4 | 880 | |
b862f26f SH |
881 | if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) |
882 | return -EINTR; | |
1da177e4 | 883 | |
1da177e4 LT |
884 | command_status = FD_COMMAND_NONE; |
885 | ||
070ad7e7 | 886 | reschedule_timeout(drive, "lock fdc"); |
1da177e4 LT |
887 | set_fdc(drive); |
888 | return 0; | |
889 | } | |
890 | ||
1da177e4 | 891 | /* unlocks the driver */ |
be7a12bb | 892 | static void unlock_fdc(void) |
1da177e4 | 893 | { |
1da177e4 LT |
894 | if (!test_bit(0, &fdc_busy)) |
895 | DPRINT("FDC access conflict!\n"); | |
896 | ||
070ad7e7 | 897 | raw_cmd = NULL; |
1da177e4 | 898 | command_status = FD_COMMAND_NONE; |
136b5721 | 899 | cancel_delayed_work(&fd_timeout); |
070ad7e7 | 900 | do_floppy = NULL; |
1da177e4 LT |
901 | cont = NULL; |
902 | clear_bit(0, &fdc_busy); | |
1da177e4 LT |
903 | wake_up(&fdc_wait); |
904 | } | |
905 | ||
906 | /* switches the motor off after a given timeout */ | |
b1bf4210 | 907 | static void motor_off_callback(struct timer_list *t) |
1da177e4 | 908 | { |
b1bf4210 | 909 | unsigned long nr = t - motor_off_timer; |
1da177e4 LT |
910 | unsigned char mask = ~(0x10 << UNIT(nr)); |
911 | ||
b1bf4210 KC |
912 | if (WARN_ON_ONCE(nr >= N_DRIVE)) |
913 | return; | |
914 | ||
1da177e4 LT |
915 | set_dor(FDC(nr), mask, 0); |
916 | } | |
917 | ||
918 | /* schedules motor off */ | |
919 | static void floppy_off(unsigned int drive) | |
920 | { | |
921 | unsigned long volatile delta; | |
fdc1ca8a | 922 | int fdc = FDC(drive); |
1da177e4 | 923 | |
de6048b8 | 924 | if (!(fdc_state[fdc].dor & (0x10 << UNIT(drive)))) |
1da177e4 LT |
925 | return; |
926 | ||
927 | del_timer(motor_off_timer + drive); | |
928 | ||
929 | /* make spindle stop in a position which minimizes spinup time | |
930 | * next time */ | |
1ce9ae96 | 931 | if (drive_params[drive].rps) { |
8d9d34e2 | 932 | delta = jiffies - drive_state[drive].first_read_date + HZ - |
1ce9ae96 WT |
933 | drive_params[drive].spindown_offset; |
934 | delta = ((delta * drive_params[drive].rps) % HZ) / drive_params[drive].rps; | |
1da177e4 | 935 | motor_off_timer[drive].expires = |
1ce9ae96 | 936 | jiffies + drive_params[drive].spindown - delta; |
1da177e4 LT |
937 | } |
938 | add_timer(motor_off_timer + drive); | |
939 | } | |
940 | ||
941 | /* | |
942 | * cycle through all N_DRIVE floppy drives, for disk change testing. | |
943 | * stopping at current drive. This is done before any long operation, to | |
944 | * be sure to have up to date disk change information. | |
945 | */ | |
946 | static void scandrives(void) | |
947 | { | |
06f748c4 JJ |
948 | int i; |
949 | int drive; | |
950 | int saved_drive; | |
1da177e4 | 951 | |
031faabd | 952 | if (drive_params[current_drive].select_delay) |
1da177e4 LT |
953 | return; |
954 | ||
955 | saved_drive = current_drive; | |
956 | for (i = 0; i < N_DRIVE; i++) { | |
957 | drive = (saved_drive + i + 1) % N_DRIVE; | |
8d9d34e2 | 958 | if (drive_state[drive].fd_ref == 0 || drive_params[drive].select_delay != 0) |
1da177e4 LT |
959 | continue; /* skip closed drives */ |
960 | set_fdc(drive); | |
961 | if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & | |
962 | (0x10 << UNIT(drive)))) | |
963 | /* switch the motor off again, if it was off to | |
964 | * begin with */ | |
965 | set_dor(fdc, ~(0x10 << UNIT(drive)), 0); | |
966 | } | |
967 | set_fdc(saved_drive); | |
968 | } | |
969 | ||
970 | static void empty(void) | |
971 | { | |
972 | } | |
973 | ||
75ddb38f TH |
974 | static void (*floppy_work_fn)(void); |
975 | ||
976 | static void floppy_work_workfn(struct work_struct *work) | |
977 | { | |
978 | floppy_work_fn(); | |
979 | } | |
980 | ||
981 | static DECLARE_WORK(floppy_work, floppy_work_workfn); | |
1da177e4 | 982 | |
48c8cee6 | 983 | static void schedule_bh(void (*handler)(void)) |
1da177e4 | 984 | { |
070ad7e7 JK |
985 | WARN_ON(work_pending(&floppy_work)); |
986 | ||
75ddb38f | 987 | floppy_work_fn = handler; |
070ad7e7 | 988 | queue_work(floppy_wq, &floppy_work); |
1da177e4 LT |
989 | } |
990 | ||
75ddb38f TH |
991 | static void (*fd_timer_fn)(void) = NULL; |
992 | ||
993 | static void fd_timer_workfn(struct work_struct *work) | |
994 | { | |
995 | fd_timer_fn(); | |
996 | } | |
997 | ||
998 | static DECLARE_DELAYED_WORK(fd_timer, fd_timer_workfn); | |
1da177e4 LT |
999 | |
1000 | static void cancel_activity(void) | |
1001 | { | |
1da177e4 | 1002 | do_floppy = NULL; |
070ad7e7 JK |
1003 | cancel_delayed_work_sync(&fd_timer); |
1004 | cancel_work_sync(&floppy_work); | |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | /* this function makes sure that the disk stays in the drive during the | |
1008 | * transfer */ | |
75ddb38f | 1009 | static void fd_watchdog(void) |
1da177e4 | 1010 | { |
031faabd WT |
1011 | debug_dcl(drive_params[current_drive].flags, |
1012 | "calling disk change from watchdog\n"); | |
1da177e4 LT |
1013 | |
1014 | if (disk_change(current_drive)) { | |
1015 | DPRINT("disk removed during i/o\n"); | |
1016 | cancel_activity(); | |
1017 | cont->done(0); | |
1018 | reset_fdc(); | |
1019 | } else { | |
070ad7e7 | 1020 | cancel_delayed_work(&fd_timer); |
75ddb38f | 1021 | fd_timer_fn = fd_watchdog; |
070ad7e7 | 1022 | queue_delayed_work(floppy_wq, &fd_timer, HZ / 10); |
1da177e4 LT |
1023 | } |
1024 | } | |
1025 | ||
1026 | static void main_command_interrupt(void) | |
1027 | { | |
070ad7e7 | 1028 | cancel_delayed_work(&fd_timer); |
1da177e4 LT |
1029 | cont->interrupt(); |
1030 | } | |
1031 | ||
1032 | /* waits for a delay (spinup or select) to pass */ | |
75ddb38f TH |
1033 | static int fd_wait_for_completion(unsigned long expires, |
1034 | void (*function)(void)) | |
1da177e4 | 1035 | { |
de6048b8 | 1036 | if (fdc_state[fdc].reset) { |
1da177e4 LT |
1037 | reset_fdc(); /* do the reset during sleep to win time |
1038 | * if we don't need to sleep, it's a good | |
1039 | * occasion anyways */ | |
1040 | return 1; | |
1041 | } | |
1042 | ||
070ad7e7 JK |
1043 | if (time_before(jiffies, expires)) { |
1044 | cancel_delayed_work(&fd_timer); | |
75ddb38f | 1045 | fd_timer_fn = function; |
070ad7e7 | 1046 | queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies); |
1da177e4 LT |
1047 | return 1; |
1048 | } | |
1049 | return 0; | |
1050 | } | |
1051 | ||
1da177e4 LT |
1052 | static void setup_DMA(void) |
1053 | { | |
1054 | unsigned long f; | |
1055 | ||
1da177e4 LT |
1056 | if (raw_cmd->length == 0) { |
1057 | int i; | |
1058 | ||
b46df356 | 1059 | pr_info("zero dma transfer size:"); |
1da177e4 | 1060 | for (i = 0; i < raw_cmd->cmd_count; i++) |
b46df356 JP |
1061 | pr_cont("%x,", raw_cmd->cmd[i]); |
1062 | pr_cont("\n"); | |
1da177e4 | 1063 | cont->done(0); |
de6048b8 | 1064 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1065 | return; |
1066 | } | |
1067 | if (((unsigned long)raw_cmd->kernel_data) % 512) { | |
b46df356 | 1068 | pr_info("non aligned address: %p\n", raw_cmd->kernel_data); |
1da177e4 | 1069 | cont->done(0); |
de6048b8 | 1070 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1071 | return; |
1072 | } | |
1da177e4 LT |
1073 | f = claim_dma_lock(); |
1074 | fd_disable_dma(); | |
1075 | #ifdef fd_dma_setup | |
1076 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, | |
1077 | (raw_cmd->flags & FD_RAW_READ) ? | |
de6048b8 | 1078 | DMA_MODE_READ : DMA_MODE_WRITE, fdc_state[fdc].address) < 0) { |
1da177e4 LT |
1079 | release_dma_lock(f); |
1080 | cont->done(0); | |
de6048b8 | 1081 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1082 | return; |
1083 | } | |
1084 | release_dma_lock(f); | |
1085 | #else | |
1086 | fd_clear_dma_ff(); | |
1087 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); | |
1088 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? | |
1089 | DMA_MODE_READ : DMA_MODE_WRITE); | |
1090 | fd_set_dma_addr(raw_cmd->kernel_data); | |
1091 | fd_set_dma_count(raw_cmd->length); | |
de6048b8 | 1092 | virtual_dma_port = fdc_state[fdc].address; |
1da177e4 LT |
1093 | fd_enable_dma(); |
1094 | release_dma_lock(f); | |
1095 | #endif | |
1da177e4 LT |
1096 | } |
1097 | ||
1098 | static void show_floppy(void); | |
1099 | ||
1100 | /* waits until the fdc becomes ready */ | |
1101 | static int wait_til_ready(void) | |
1102 | { | |
06f748c4 JJ |
1103 | int status; |
1104 | int counter; | |
1105 | ||
de6048b8 | 1106 | if (fdc_state[fdc].reset) |
1da177e4 LT |
1107 | return -1; |
1108 | for (counter = 0; counter < 10000; counter++) { | |
1109 | status = fd_inb(FD_STATUS); | |
1110 | if (status & STATUS_READY) | |
1111 | return status; | |
1112 | } | |
29f1c784 | 1113 | if (initialized) { |
1da177e4 LT |
1114 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); |
1115 | show_floppy(); | |
1116 | } | |
de6048b8 | 1117 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1118 | return -1; |
1119 | } | |
1120 | ||
1121 | /* sends a command byte to the fdc */ | |
1122 | static int output_byte(char byte) | |
1123 | { | |
d7b2b2ec | 1124 | int status = wait_til_ready(); |
1da177e4 | 1125 | |
d7b2b2ec | 1126 | if (status < 0) |
1da177e4 | 1127 | return -1; |
57584c5a JP |
1128 | |
1129 | if (is_ready_state(status)) { | |
1da177e4 | 1130 | fd_outb(byte, FD_DATA); |
1da177e4 LT |
1131 | output_log[output_log_pos].data = byte; |
1132 | output_log[output_log_pos].status = status; | |
1133 | output_log[output_log_pos].jiffies = jiffies; | |
1134 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; | |
1da177e4 LT |
1135 | return 0; |
1136 | } | |
de6048b8 | 1137 | fdc_state[fdc].reset = 1; |
29f1c784 | 1138 | if (initialized) { |
1da177e4 LT |
1139 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", |
1140 | byte, fdc, status); | |
1141 | show_floppy(); | |
1142 | } | |
1143 | return -1; | |
1144 | } | |
1145 | ||
1da177e4 LT |
1146 | /* gets the response from the fdc */ |
1147 | static int result(void) | |
1148 | { | |
06f748c4 JJ |
1149 | int i; |
1150 | int status = 0; | |
1da177e4 LT |
1151 | |
1152 | for (i = 0; i < MAX_REPLIES; i++) { | |
d7b2b2ec JP |
1153 | status = wait_til_ready(); |
1154 | if (status < 0) | |
1da177e4 LT |
1155 | break; |
1156 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; | |
1157 | if ((status & ~STATUS_BUSY) == STATUS_READY) { | |
1da177e4 LT |
1158 | resultjiffies = jiffies; |
1159 | resultsize = i; | |
1da177e4 LT |
1160 | return i; |
1161 | } | |
1162 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) | |
1163 | reply_buffer[i] = fd_inb(FD_DATA); | |
1164 | else | |
1165 | break; | |
1166 | } | |
29f1c784 JP |
1167 | if (initialized) { |
1168 | DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", | |
1169 | fdc, status, i); | |
1da177e4 LT |
1170 | show_floppy(); |
1171 | } | |
de6048b8 | 1172 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1173 | return -1; |
1174 | } | |
1175 | ||
1176 | #define MORE_OUTPUT -2 | |
1177 | /* does the fdc need more output? */ | |
1178 | static int need_more_output(void) | |
1179 | { | |
d7b2b2ec | 1180 | int status = wait_til_ready(); |
06f748c4 | 1181 | |
d7b2b2ec | 1182 | if (status < 0) |
1da177e4 | 1183 | return -1; |
57584c5a JP |
1184 | |
1185 | if (is_ready_state(status)) | |
1da177e4 | 1186 | return MORE_OUTPUT; |
57584c5a | 1187 | |
1da177e4 LT |
1188 | return result(); |
1189 | } | |
1190 | ||
1191 | /* Set perpendicular mode as required, based on data rate, if supported. | |
1192 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. | |
1193 | */ | |
be7a12bb | 1194 | static void perpendicular_mode(void) |
1da177e4 LT |
1195 | { |
1196 | unsigned char perp_mode; | |
1197 | ||
1198 | if (raw_cmd->rate & 0x40) { | |
1199 | switch (raw_cmd->rate & 3) { | |
1200 | case 0: | |
1201 | perp_mode = 2; | |
1202 | break; | |
1203 | case 3: | |
1204 | perp_mode = 3; | |
1205 | break; | |
1206 | default: | |
1207 | DPRINT("Invalid data rate for perpendicular mode!\n"); | |
1208 | cont->done(0); | |
de6048b8 | 1209 | fdc_state[fdc].reset = 1; |
bb57f0c6 JP |
1210 | /* |
1211 | * convenient way to return to | |
1212 | * redo without too much hassle | |
1213 | * (deep stack et al.) | |
1214 | */ | |
1da177e4 LT |
1215 | return; |
1216 | } | |
1217 | } else | |
1218 | perp_mode = 0; | |
1219 | ||
de6048b8 | 1220 | if (fdc_state[fdc].perp_mode == perp_mode) |
1da177e4 | 1221 | return; |
de6048b8 | 1222 | if (fdc_state[fdc].version >= FDC_82077_ORIG) { |
1da177e4 LT |
1223 | output_byte(FD_PERPENDICULAR); |
1224 | output_byte(perp_mode); | |
de6048b8 | 1225 | fdc_state[fdc].perp_mode = perp_mode; |
1da177e4 LT |
1226 | } else if (perp_mode) { |
1227 | DPRINT("perpendicular mode not supported by this FDC.\n"); | |
1228 | } | |
1229 | } /* perpendicular_mode */ | |
1230 | ||
1231 | static int fifo_depth = 0xa; | |
1232 | static int no_fifo; | |
1233 | ||
1234 | static int fdc_configure(void) | |
1235 | { | |
1236 | /* Turn on FIFO */ | |
1237 | output_byte(FD_CONFIGURE); | |
1238 | if (need_more_output() != MORE_OUTPUT) | |
1239 | return 0; | |
1240 | output_byte(0); | |
1241 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); | |
1242 | output_byte(0); /* pre-compensation from track | |
1243 | 0 upwards */ | |
1244 | return 1; | |
1245 | } | |
1246 | ||
1247 | #define NOMINAL_DTR 500 | |
1248 | ||
1249 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, | |
1250 | * head load time, and DMA disable flag to values needed by floppy. | |
1251 | * | |
1252 | * The value "dtr" is the data transfer rate in Kbps. It is needed | |
1253 | * to account for the data rate-based scaling done by the 82072 and 82077 | |
1254 | * FDC types. This parameter is ignored for other types of FDCs (i.e. | |
1255 | * 8272a). | |
1256 | * | |
1257 | * Note that changing the data transfer rate has a (probably deleterious) | |
1258 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so | |
1259 | * fdc_specify is called again after each data transfer rate | |
1260 | * change. | |
1261 | * | |
1262 | * srt: 1000 to 16000 in microseconds | |
1263 | * hut: 16 to 240 milliseconds | |
1264 | * hlt: 2 to 254 milliseconds | |
1265 | * | |
1266 | * These values are rounded up to the next highest available delay time. | |
1267 | */ | |
1268 | static void fdc_specify(void) | |
1269 | { | |
06f748c4 JJ |
1270 | unsigned char spec1; |
1271 | unsigned char spec2; | |
1272 | unsigned long srt; | |
1273 | unsigned long hlt; | |
1274 | unsigned long hut; | |
1da177e4 LT |
1275 | unsigned long dtr = NOMINAL_DTR; |
1276 | unsigned long scale_dtr = NOMINAL_DTR; | |
1277 | int hlt_max_code = 0x7f; | |
1278 | int hut_max_code = 0xf; | |
1279 | ||
de6048b8 | 1280 | if (fdc_state[fdc].need_configure && fdc_state[fdc].version >= FDC_82072A) { |
1da177e4 | 1281 | fdc_configure(); |
de6048b8 | 1282 | fdc_state[fdc].need_configure = 0; |
1da177e4 LT |
1283 | } |
1284 | ||
1285 | switch (raw_cmd->rate & 0x03) { | |
1286 | case 3: | |
1287 | dtr = 1000; | |
1288 | break; | |
1289 | case 1: | |
1290 | dtr = 300; | |
de6048b8 | 1291 | if (fdc_state[fdc].version >= FDC_82078) { |
1da177e4 LT |
1292 | /* chose the default rate table, not the one |
1293 | * where 1 = 2 Mbps */ | |
1294 | output_byte(FD_DRIVESPEC); | |
1295 | if (need_more_output() == MORE_OUTPUT) { | |
1296 | output_byte(UNIT(current_drive)); | |
1297 | output_byte(0xc0); | |
1298 | } | |
1299 | } | |
1300 | break; | |
1301 | case 2: | |
1302 | dtr = 250; | |
1303 | break; | |
1304 | } | |
1305 | ||
de6048b8 | 1306 | if (fdc_state[fdc].version >= FDC_82072) { |
1da177e4 LT |
1307 | scale_dtr = dtr; |
1308 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1309 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1310 | } | |
1311 | ||
1312 | /* Convert step rate from microseconds to milliseconds and 4 bits */ | |
031faabd WT |
1313 | srt = 16 - DIV_ROUND_UP(drive_params[current_drive].srt * scale_dtr / 1000, |
1314 | NOMINAL_DTR); | |
a81ee544 | 1315 | if (slow_floppy) |
1da177e4 | 1316 | srt = srt / 4; |
a81ee544 | 1317 | |
1da177e4 LT |
1318 | SUPBOUND(srt, 0xf); |
1319 | INFBOUND(srt, 0); | |
1320 | ||
031faabd WT |
1321 | hlt = DIV_ROUND_UP(drive_params[current_drive].hlt * scale_dtr / 2, |
1322 | NOMINAL_DTR); | |
1da177e4 LT |
1323 | if (hlt < 0x01) |
1324 | hlt = 0x01; | |
1325 | else if (hlt > 0x7f) | |
1326 | hlt = hlt_max_code; | |
1327 | ||
031faabd WT |
1328 | hut = DIV_ROUND_UP(drive_params[current_drive].hut * scale_dtr / 16, |
1329 | NOMINAL_DTR); | |
1da177e4 LT |
1330 | if (hut < 0x1) |
1331 | hut = 0x1; | |
1332 | else if (hut > 0xf) | |
1333 | hut = hut_max_code; | |
1334 | ||
1335 | spec1 = (srt << 4) | hut; | |
1336 | spec2 = (hlt << 1) | (use_virtual_dma & 1); | |
1337 | ||
1338 | /* If these parameters did not change, just return with success */ | |
de6048b8 | 1339 | if (fdc_state[fdc].spec1 != spec1 || fdc_state[fdc].spec2 != spec2) { |
1da177e4 LT |
1340 | /* Go ahead and set spec1 and spec2 */ |
1341 | output_byte(FD_SPECIFY); | |
de6048b8 WT |
1342 | output_byte(fdc_state[fdc].spec1 = spec1); |
1343 | output_byte(fdc_state[fdc].spec2 = spec2); | |
1da177e4 LT |
1344 | } |
1345 | } /* fdc_specify */ | |
1346 | ||
1347 | /* Set the FDC's data transfer rate on behalf of the specified drive. | |
1348 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue | |
1349 | * of the specify command (i.e. using the fdc_specify function). | |
1350 | */ | |
1351 | static int fdc_dtr(void) | |
1352 | { | |
1353 | /* If data rate not already set to desired value, set it. */ | |
de6048b8 | 1354 | if ((raw_cmd->rate & 3) == fdc_state[fdc].dtr) |
1da177e4 LT |
1355 | return 0; |
1356 | ||
1357 | /* Set dtr */ | |
1358 | fd_outb(raw_cmd->rate & 3, FD_DCR); | |
1359 | ||
1360 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) | |
1361 | * need a stabilization period of several milliseconds to be | |
1362 | * enforced after data rate changes before R/W operations. | |
1363 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) | |
1364 | */ | |
de6048b8 | 1365 | fdc_state[fdc].dtr = raw_cmd->rate & 3; |
75ddb38f | 1366 | return fd_wait_for_completion(jiffies + 2UL * HZ / 100, floppy_ready); |
1da177e4 LT |
1367 | } /* fdc_dtr */ |
1368 | ||
1369 | static void tell_sector(void) | |
1370 | { | |
b46df356 JP |
1371 | pr_cont(": track %d, head %d, sector %d, size %d", |
1372 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); | |
1da177e4 LT |
1373 | } /* tell_sector */ |
1374 | ||
b46df356 JP |
1375 | static void print_errors(void) |
1376 | { | |
1377 | DPRINT(""); | |
1378 | if (ST0 & ST0_ECE) { | |
1379 | pr_cont("Recalibrate failed!"); | |
1380 | } else if (ST2 & ST2_CRC) { | |
1381 | pr_cont("data CRC error"); | |
1382 | tell_sector(); | |
1383 | } else if (ST1 & ST1_CRC) { | |
1384 | pr_cont("CRC error"); | |
1385 | tell_sector(); | |
1386 | } else if ((ST1 & (ST1_MAM | ST1_ND)) || | |
1387 | (ST2 & ST2_MAM)) { | |
1388 | if (!probing) { | |
1389 | pr_cont("sector not found"); | |
1390 | tell_sector(); | |
1391 | } else | |
1392 | pr_cont("probe failed..."); | |
1393 | } else if (ST2 & ST2_WC) { /* seek error */ | |
1394 | pr_cont("wrong cylinder"); | |
1395 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ | |
1396 | pr_cont("bad cylinder"); | |
1397 | } else { | |
1398 | pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", | |
1399 | ST0, ST1, ST2); | |
1400 | tell_sector(); | |
1401 | } | |
1402 | pr_cont("\n"); | |
1403 | } | |
1404 | ||
1da177e4 LT |
1405 | /* |
1406 | * OK, this error interpreting routine is called after a | |
1407 | * DMA read/write has succeeded | |
1408 | * or failed, so we check the results, and copy any buffers. | |
1409 | * hhb: Added better error reporting. | |
1410 | * ak: Made this into a separate routine. | |
1411 | */ | |
1412 | static int interpret_errors(void) | |
1413 | { | |
1414 | char bad; | |
1415 | ||
1416 | if (inr != 7) { | |
891eda80 | 1417 | DPRINT("-- FDC reply error\n"); |
de6048b8 | 1418 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1419 | return 1; |
1420 | } | |
1421 | ||
1422 | /* check IC to find cause of interrupt */ | |
1423 | switch (ST0 & ST0_INTR) { | |
1424 | case 0x40: /* error occurred during command execution */ | |
1425 | if (ST1 & ST1_EOC) | |
1426 | return 0; /* occurs with pseudo-DMA */ | |
1427 | bad = 1; | |
1428 | if (ST1 & ST1_WP) { | |
1429 | DPRINT("Drive is write protected\n"); | |
e0298536 | 1430 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1431 | cont->done(0); |
1432 | bad = 2; | |
1433 | } else if (ST1 & ST1_ND) { | |
e0298536 | 1434 | set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); |
1da177e4 | 1435 | } else if (ST1 & ST1_OR) { |
031faabd | 1436 | if (drive_params[current_drive].flags & FTD_MSG) |
1da177e4 LT |
1437 | DPRINT("Over/Underrun - retrying\n"); |
1438 | bad = 0; | |
031faabd | 1439 | } else if (*errors >= drive_params[current_drive].max_errors.reporting) { |
b46df356 | 1440 | print_errors(); |
1da177e4 LT |
1441 | } |
1442 | if (ST2 & ST2_WC || ST2 & ST2_BC) | |
1443 | /* wrong cylinder => recal */ | |
1444 | DRS->track = NEED_2_RECAL; | |
1445 | return bad; | |
1446 | case 0x80: /* invalid command given */ | |
1447 | DPRINT("Invalid FDC command given!\n"); | |
1448 | cont->done(0); | |
1449 | return 2; | |
1450 | case 0xc0: | |
1451 | DPRINT("Abnormal termination caused by polling\n"); | |
1452 | cont->error(); | |
1453 | return 2; | |
1454 | default: /* (0) Normal command termination */ | |
1455 | return 0; | |
1456 | } | |
1457 | } | |
1458 | ||
1459 | /* | |
1460 | * This routine is called when everything should be correctly set up | |
1461 | * for the transfer (i.e. floppy motor is on, the correct floppy is | |
1462 | * selected, and the head is sitting on the right track). | |
1463 | */ | |
1464 | static void setup_rw_floppy(void) | |
1465 | { | |
06f748c4 JJ |
1466 | int i; |
1467 | int r; | |
1468 | int flags; | |
1da177e4 | 1469 | unsigned long ready_date; |
75ddb38f | 1470 | void (*function)(void); |
1da177e4 LT |
1471 | |
1472 | flags = raw_cmd->flags; | |
1473 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) | |
1474 | flags |= FD_RAW_INTR; | |
1475 | ||
1476 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { | |
031faabd | 1477 | ready_date = DRS->spinup_date + drive_params[current_drive].spinup; |
1da177e4 LT |
1478 | /* If spinup will take a long time, rerun scandrives |
1479 | * again just before spinup completion. Beware that | |
1480 | * after scandrives, we must again wait for selection. | |
1481 | */ | |
031faabd WT |
1482 | if (time_after(ready_date, jiffies + drive_params[current_drive].select_delay)) { |
1483 | ready_date -= drive_params[current_drive].select_delay; | |
75ddb38f | 1484 | function = floppy_start; |
1da177e4 | 1485 | } else |
75ddb38f | 1486 | function = setup_rw_floppy; |
1da177e4 LT |
1487 | |
1488 | /* wait until the floppy is spinning fast enough */ | |
1489 | if (fd_wait_for_completion(ready_date, function)) | |
1490 | return; | |
1491 | } | |
1da177e4 LT |
1492 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) |
1493 | setup_DMA(); | |
1494 | ||
1495 | if (flags & FD_RAW_INTR) | |
1496 | do_floppy = main_command_interrupt; | |
1497 | ||
1498 | r = 0; | |
1499 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1500 | r |= output_byte(raw_cmd->cmd[i]); | |
1501 | ||
ded2863d | 1502 | debugt(__func__, "rw_command"); |
1da177e4 LT |
1503 | |
1504 | if (r) { | |
1505 | cont->error(); | |
1506 | reset_fdc(); | |
1507 | return; | |
1508 | } | |
1509 | ||
1510 | if (!(flags & FD_RAW_INTR)) { | |
1511 | inr = result(); | |
1512 | cont->interrupt(); | |
1513 | } else if (flags & FD_RAW_NEED_DISK) | |
75ddb38f | 1514 | fd_watchdog(); |
1da177e4 LT |
1515 | } |
1516 | ||
1517 | static int blind_seek; | |
1518 | ||
1519 | /* | |
1520 | * This is the routine called after every seek (or recalibrate) interrupt | |
1521 | * from the floppy controller. | |
1522 | */ | |
1523 | static void seek_interrupt(void) | |
1524 | { | |
ded2863d | 1525 | debugt(__func__, ""); |
1da177e4 LT |
1526 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { |
1527 | DPRINT("seek failed\n"); | |
1528 | DRS->track = NEED_2_RECAL; | |
1529 | cont->error(); | |
1530 | cont->redo(); | |
1531 | return; | |
1532 | } | |
1533 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { | |
031faabd | 1534 | debug_dcl(drive_params[current_drive].flags, |
87f530d8 | 1535 | "clearing NEWCHANGE flag because of effective seek\n"); |
031faabd WT |
1536 | debug_dcl(drive_params[current_drive].flags, "jiffies=%lu\n", |
1537 | jiffies); | |
e0298536 JP |
1538 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1539 | /* effective seek */ | |
1da177e4 LT |
1540 | DRS->select_date = jiffies; |
1541 | } | |
1542 | DRS->track = ST1; | |
1543 | floppy_ready(); | |
1544 | } | |
1545 | ||
1546 | static void check_wp(void) | |
1547 | { | |
e0298536 JP |
1548 | if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { |
1549 | /* check write protection */ | |
1da177e4 LT |
1550 | output_byte(FD_GETSTATUS); |
1551 | output_byte(UNIT(current_drive)); | |
1552 | if (result() != 1) { | |
de6048b8 | 1553 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1554 | return; |
1555 | } | |
e0298536 JP |
1556 | clear_bit(FD_VERIFY_BIT, &DRS->flags); |
1557 | clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); | |
031faabd | 1558 | debug_dcl(drive_params[current_drive].flags, |
87f530d8 | 1559 | "checking whether disk is write protected\n"); |
031faabd WT |
1560 | debug_dcl(drive_params[current_drive].flags, "wp=%x\n", |
1561 | ST3 & 0x40); | |
1da177e4 | 1562 | if (!(ST3 & 0x40)) |
e0298536 | 1563 | set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 | 1564 | else |
e0298536 | 1565 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1566 | } |
1567 | } | |
1568 | ||
1569 | static void seek_floppy(void) | |
1570 | { | |
1571 | int track; | |
1572 | ||
1573 | blind_seek = 0; | |
1574 | ||
031faabd WT |
1575 | debug_dcl(drive_params[current_drive].flags, |
1576 | "calling disk change from %s\n", __func__); | |
1da177e4 | 1577 | |
e0298536 | 1578 | if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1579 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { |
1580 | /* the media changed flag should be cleared after the seek. | |
1581 | * If it isn't, this means that there is really no disk in | |
1582 | * the drive. | |
1583 | */ | |
e0298536 | 1584 | set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); |
1da177e4 LT |
1585 | cont->done(0); |
1586 | cont->redo(); | |
1587 | return; | |
1588 | } | |
1589 | if (DRS->track <= NEED_1_RECAL) { | |
1590 | recalibrate_floppy(); | |
1591 | return; | |
e0298536 | 1592 | } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1593 | (raw_cmd->flags & FD_RAW_NEED_DISK) && |
1594 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { | |
1595 | /* we seek to clear the media-changed condition. Does anybody | |
1596 | * know a more elegant way, which works on all drives? */ | |
1597 | if (raw_cmd->track) | |
1598 | track = raw_cmd->track - 1; | |
1599 | else { | |
031faabd | 1600 | if (drive_params[current_drive].flags & FD_SILENT_DCL_CLEAR) { |
1da177e4 LT |
1601 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); |
1602 | blind_seek = 1; | |
1603 | raw_cmd->flags |= FD_RAW_NEED_SEEK; | |
1604 | } | |
1605 | track = 1; | |
1606 | } | |
1607 | } else { | |
1608 | check_wp(); | |
1609 | if (raw_cmd->track != DRS->track && | |
1610 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) | |
1611 | track = raw_cmd->track; | |
1612 | else { | |
1613 | setup_rw_floppy(); | |
1614 | return; | |
1615 | } | |
1616 | } | |
1617 | ||
1618 | do_floppy = seek_interrupt; | |
1619 | output_byte(FD_SEEK); | |
1620 | output_byte(UNIT(current_drive)); | |
2300f90e JP |
1621 | if (output_byte(track) < 0) { |
1622 | reset_fdc(); | |
1623 | return; | |
1624 | } | |
ded2863d | 1625 | debugt(__func__, ""); |
1da177e4 LT |
1626 | } |
1627 | ||
1628 | static void recal_interrupt(void) | |
1629 | { | |
ded2863d | 1630 | debugt(__func__, ""); |
1da177e4 | 1631 | if (inr != 2) |
de6048b8 | 1632 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1633 | else if (ST0 & ST0_ECE) { |
1634 | switch (DRS->track) { | |
1635 | case NEED_1_RECAL: | |
ded2863d | 1636 | debugt(__func__, "need 1 recal"); |
1da177e4 LT |
1637 | /* after a second recalibrate, we still haven't |
1638 | * reached track 0. Probably no drive. Raise an | |
1639 | * error, as failing immediately might upset | |
1640 | * computers possessed by the Devil :-) */ | |
1641 | cont->error(); | |
1642 | cont->redo(); | |
1643 | return; | |
1644 | case NEED_2_RECAL: | |
ded2863d | 1645 | debugt(__func__, "need 2 recal"); |
1da177e4 LT |
1646 | /* If we already did a recalibrate, |
1647 | * and we are not at track 0, this | |
1648 | * means we have moved. (The only way | |
1649 | * not to move at recalibration is to | |
1650 | * be already at track 0.) Clear the | |
1651 | * new change flag */ | |
031faabd | 1652 | debug_dcl(drive_params[current_drive].flags, |
87f530d8 | 1653 | "clearing NEWCHANGE flag because of second recalibrate\n"); |
1da177e4 | 1654 | |
e0298536 | 1655 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1656 | DRS->select_date = jiffies; |
1657 | /* fall through */ | |
1658 | default: | |
ded2863d | 1659 | debugt(__func__, "default"); |
1da177e4 LT |
1660 | /* Recalibrate moves the head by at |
1661 | * most 80 steps. If after one | |
1662 | * recalibrate we don't have reached | |
1663 | * track 0, this might mean that we | |
1664 | * started beyond track 80. Try | |
1665 | * again. */ | |
1666 | DRS->track = NEED_1_RECAL; | |
1667 | break; | |
1668 | } | |
1669 | } else | |
1670 | DRS->track = ST1; | |
1671 | floppy_ready(); | |
1672 | } | |
1673 | ||
1674 | static void print_result(char *message, int inr) | |
1675 | { | |
1676 | int i; | |
1677 | ||
1678 | DPRINT("%s ", message); | |
1679 | if (inr >= 0) | |
1680 | for (i = 0; i < inr; i++) | |
b46df356 JP |
1681 | pr_cont("repl[%d]=%x ", i, reply_buffer[i]); |
1682 | pr_cont("\n"); | |
1da177e4 LT |
1683 | } |
1684 | ||
1685 | /* interrupt handler. Note that this can be called externally on the Sparc */ | |
7d12e780 | 1686 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1da177e4 | 1687 | { |
1da177e4 LT |
1688 | int do_print; |
1689 | unsigned long f; | |
06f748c4 | 1690 | void (*handler)(void) = do_floppy; |
1da177e4 LT |
1691 | |
1692 | lasthandler = handler; | |
1693 | interruptjiffies = jiffies; | |
1694 | ||
1695 | f = claim_dma_lock(); | |
1696 | fd_disable_dma(); | |
1697 | release_dma_lock(f); | |
1698 | ||
1da177e4 | 1699 | do_floppy = NULL; |
de6048b8 | 1700 | if (fdc >= N_FDC || fdc_state[fdc].address == -1) { |
1da177e4 | 1701 | /* we don't even know which FDC is the culprit */ |
b46df356 JP |
1702 | pr_info("DOR0=%x\n", fdc_state[0].dor); |
1703 | pr_info("floppy interrupt on bizarre fdc %d\n", fdc); | |
d75f773c | 1704 | pr_info("handler=%ps\n", handler); |
275176bc | 1705 | is_alive(__func__, "bizarre fdc"); |
1da177e4 LT |
1706 | return IRQ_NONE; |
1707 | } | |
1708 | ||
de6048b8 | 1709 | fdc_state[fdc].reset = 0; |
1da177e4 LT |
1710 | /* We have to clear the reset flag here, because apparently on boxes |
1711 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to | |
de6048b8 WT |
1712 | * emit SENSEI's to clear the interrupt line. And fdc_state[fdc].reset |
1713 | * blocks the emission of the SENSEI's. | |
1da177e4 LT |
1714 | * It is OK to emit floppy commands because we are in an interrupt |
1715 | * handler here, and thus we have to fear no interference of other | |
1716 | * activity. | |
1717 | */ | |
1718 | ||
29f1c784 | 1719 | do_print = !handler && print_unex && initialized; |
1da177e4 LT |
1720 | |
1721 | inr = result(); | |
1722 | if (do_print) | |
1723 | print_result("unexpected interrupt", inr); | |
1724 | if (inr == 0) { | |
1725 | int max_sensei = 4; | |
1726 | do { | |
1727 | output_byte(FD_SENSEI); | |
1728 | inr = result(); | |
1729 | if (do_print) | |
1730 | print_result("sensei", inr); | |
1731 | max_sensei--; | |
c529730a JP |
1732 | } while ((ST0 & 0x83) != UNIT(current_drive) && |
1733 | inr == 2 && max_sensei); | |
1da177e4 LT |
1734 | } |
1735 | if (!handler) { | |
de6048b8 | 1736 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1737 | return IRQ_NONE; |
1738 | } | |
1739 | schedule_bh(handler); | |
275176bc | 1740 | is_alive(__func__, "normal interrupt end"); |
1da177e4 LT |
1741 | |
1742 | /* FIXME! Was it really for us? */ | |
1743 | return IRQ_HANDLED; | |
1744 | } | |
1745 | ||
1746 | static void recalibrate_floppy(void) | |
1747 | { | |
ded2863d | 1748 | debugt(__func__, ""); |
1da177e4 LT |
1749 | do_floppy = recal_interrupt; |
1750 | output_byte(FD_RECALIBRATE); | |
15b2630c | 1751 | if (output_byte(UNIT(current_drive)) < 0) |
2300f90e | 1752 | reset_fdc(); |
1da177e4 LT |
1753 | } |
1754 | ||
1755 | /* | |
1756 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. | |
1757 | */ | |
1758 | static void reset_interrupt(void) | |
1759 | { | |
ded2863d | 1760 | debugt(__func__, ""); |
1da177e4 | 1761 | result(); /* get the status ready for set_fdc */ |
de6048b8 | 1762 | if (fdc_state[fdc].reset) { |
d75f773c | 1763 | pr_info("reset set in interrupt, calling %ps\n", cont->error); |
1da177e4 LT |
1764 | cont->error(); /* a reset just after a reset. BAD! */ |
1765 | } | |
1766 | cont->redo(); | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), | |
1771 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) | |
1772 | */ | |
1773 | static void reset_fdc(void) | |
1774 | { | |
1775 | unsigned long flags; | |
1776 | ||
1777 | do_floppy = reset_interrupt; | |
de6048b8 | 1778 | fdc_state[fdc].reset = 0; |
1da177e4 LT |
1779 | reset_fdc_info(0); |
1780 | ||
1781 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ | |
1782 | /* Irrelevant for systems with true DMA (i386). */ | |
1783 | ||
1784 | flags = claim_dma_lock(); | |
1785 | fd_disable_dma(); | |
1786 | release_dma_lock(flags); | |
1787 | ||
de6048b8 WT |
1788 | if (fdc_state[fdc].version >= FDC_82072A) |
1789 | fd_outb(0x80 | (fdc_state[fdc].dtr & 3), FD_STATUS); | |
1da177e4 | 1790 | else { |
de6048b8 | 1791 | fd_outb(fdc_state[fdc].dor & ~0x04, FD_DOR); |
1da177e4 | 1792 | udelay(FD_RESET_DELAY); |
de6048b8 | 1793 | fd_outb(fdc_state[fdc].dor, FD_DOR); |
1da177e4 LT |
1794 | } |
1795 | } | |
1796 | ||
1797 | static void show_floppy(void) | |
1798 | { | |
1799 | int i; | |
1800 | ||
b46df356 JP |
1801 | pr_info("\n"); |
1802 | pr_info("floppy driver state\n"); | |
1803 | pr_info("-------------------\n"); | |
d75f773c | 1804 | pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%ps\n", |
b46df356 JP |
1805 | jiffies, interruptjiffies, jiffies - interruptjiffies, |
1806 | lasthandler); | |
1da177e4 | 1807 | |
b46df356 JP |
1808 | pr_info("timeout_message=%s\n", timeout_message); |
1809 | pr_info("last output bytes:\n"); | |
1da177e4 | 1810 | for (i = 0; i < OLOGSIZE; i++) |
b46df356 JP |
1811 | pr_info("%2x %2x %lu\n", |
1812 | output_log[(i + output_log_pos) % OLOGSIZE].data, | |
1813 | output_log[(i + output_log_pos) % OLOGSIZE].status, | |
1814 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); | |
1815 | pr_info("last result at %lu\n", resultjiffies); | |
1816 | pr_info("last redo_fd_request at %lu\n", lastredo); | |
1817 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, | |
1818 | reply_buffer, resultsize, true); | |
1da177e4 | 1819 | |
b46df356 JP |
1820 | pr_info("status=%x\n", fd_inb(FD_STATUS)); |
1821 | pr_info("fdc_busy=%lu\n", fdc_busy); | |
1da177e4 | 1822 | if (do_floppy) |
d75f773c | 1823 | pr_info("do_floppy=%ps\n", do_floppy); |
365970a1 | 1824 | if (work_pending(&floppy_work)) |
d75f773c | 1825 | pr_info("floppy_work.func=%ps\n", floppy_work.func); |
070ad7e7 JK |
1826 | if (delayed_work_pending(&fd_timer)) |
1827 | pr_info("delayed work.function=%p expires=%ld\n", | |
1828 | fd_timer.work.func, | |
1829 | fd_timer.timer.expires - jiffies); | |
1830 | if (delayed_work_pending(&fd_timeout)) | |
1831 | pr_info("timer_function=%p expires=%ld\n", | |
1832 | fd_timeout.work.func, | |
1833 | fd_timeout.timer.expires - jiffies); | |
1834 | ||
b46df356 JP |
1835 | pr_info("cont=%p\n", cont); |
1836 | pr_info("current_req=%p\n", current_req); | |
1837 | pr_info("command_status=%d\n", command_status); | |
1838 | pr_info("\n"); | |
1da177e4 LT |
1839 | } |
1840 | ||
070ad7e7 | 1841 | static void floppy_shutdown(struct work_struct *arg) |
1da177e4 LT |
1842 | { |
1843 | unsigned long flags; | |
1844 | ||
29f1c784 | 1845 | if (initialized) |
1da177e4 LT |
1846 | show_floppy(); |
1847 | cancel_activity(); | |
1848 | ||
1da177e4 LT |
1849 | flags = claim_dma_lock(); |
1850 | fd_disable_dma(); | |
1851 | release_dma_lock(flags); | |
1852 | ||
1853 | /* avoid dma going to a random drive after shutdown */ | |
1854 | ||
29f1c784 | 1855 | if (initialized) |
1da177e4 | 1856 | DPRINT("floppy timeout called\n"); |
de6048b8 | 1857 | fdc_state[fdc].reset = 1; |
1da177e4 LT |
1858 | if (cont) { |
1859 | cont->done(0); | |
1860 | cont->redo(); /* this will recall reset when needed */ | |
1861 | } else { | |
b46df356 | 1862 | pr_info("no cont in shutdown!\n"); |
1da177e4 LT |
1863 | process_fd_request(); |
1864 | } | |
275176bc | 1865 | is_alive(__func__, ""); |
1da177e4 LT |
1866 | } |
1867 | ||
1da177e4 | 1868 | /* start motor, check media-changed condition and write protection */ |
06f748c4 | 1869 | static int start_motor(void (*function)(void)) |
1da177e4 | 1870 | { |
06f748c4 JJ |
1871 | int mask; |
1872 | int data; | |
1da177e4 LT |
1873 | |
1874 | mask = 0xfc; | |
1875 | data = UNIT(current_drive); | |
1876 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { | |
de6048b8 | 1877 | if (!(fdc_state[fdc].dor & (0x10 << UNIT(current_drive)))) { |
1da177e4 LT |
1878 | set_debugt(); |
1879 | /* no read since this drive is running */ | |
1880 | DRS->first_read_date = 0; | |
1881 | /* note motor start time if motor is not yet running */ | |
1882 | DRS->spinup_date = jiffies; | |
1883 | data |= (0x10 << UNIT(current_drive)); | |
1884 | } | |
de6048b8 | 1885 | } else if (fdc_state[fdc].dor & (0x10 << UNIT(current_drive))) |
1da177e4 LT |
1886 | mask &= ~(0x10 << UNIT(current_drive)); |
1887 | ||
1888 | /* starts motor and selects floppy */ | |
1889 | del_timer(motor_off_timer + current_drive); | |
1890 | set_dor(fdc, mask, data); | |
1891 | ||
1892 | /* wait_for_completion also schedules reset if needed. */ | |
031faabd | 1893 | return fd_wait_for_completion(DRS->select_date + drive_params[current_drive].select_delay, |
75ddb38f | 1894 | function); |
1da177e4 LT |
1895 | } |
1896 | ||
1897 | static void floppy_ready(void) | |
1898 | { | |
de6048b8 | 1899 | if (fdc_state[fdc].reset) { |
045f9836 JP |
1900 | reset_fdc(); |
1901 | return; | |
1902 | } | |
1da177e4 LT |
1903 | if (start_motor(floppy_ready)) |
1904 | return; | |
1905 | if (fdc_dtr()) | |
1906 | return; | |
1907 | ||
031faabd WT |
1908 | debug_dcl(drive_params[current_drive].flags, |
1909 | "calling disk change from floppy_ready\n"); | |
1da177e4 | 1910 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && |
031faabd | 1911 | disk_change(current_drive) && !drive_params[current_drive].select_delay) |
bb57f0c6 JP |
1912 | twaddle(); /* this clears the dcl on certain |
1913 | * drive/controller combinations */ | |
1da177e4 LT |
1914 | |
1915 | #ifdef fd_chose_dma_mode | |
1916 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { | |
1917 | unsigned long flags = claim_dma_lock(); | |
1918 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); | |
1919 | release_dma_lock(flags); | |
1920 | } | |
1921 | #endif | |
1922 | ||
1923 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { | |
1924 | perpendicular_mode(); | |
1925 | fdc_specify(); /* must be done here because of hut, hlt ... */ | |
1926 | seek_floppy(); | |
1927 | } else { | |
1928 | if ((raw_cmd->flags & FD_RAW_READ) || | |
1929 | (raw_cmd->flags & FD_RAW_WRITE)) | |
1930 | fdc_specify(); | |
1931 | setup_rw_floppy(); | |
1932 | } | |
1933 | } | |
1934 | ||
1935 | static void floppy_start(void) | |
1936 | { | |
73507e6c | 1937 | reschedule_timeout(current_reqD, "floppy start"); |
1da177e4 LT |
1938 | |
1939 | scandrives(); | |
031faabd WT |
1940 | debug_dcl(drive_params[current_drive].flags, |
1941 | "setting NEWCHANGE in floppy_start\n"); | |
e0298536 | 1942 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1943 | floppy_ready(); |
1944 | } | |
1945 | ||
1946 | /* | |
1947 | * ======================================================================== | |
1948 | * here ends the bottom half. Exported routines are: | |
1949 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, | |
1950 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. | |
1951 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt | |
1952 | * and set_dor. | |
1953 | * ======================================================================== | |
1954 | */ | |
1955 | /* | |
1956 | * General purpose continuations. | |
1957 | * ============================== | |
1958 | */ | |
1959 | ||
1960 | static void do_wakeup(void) | |
1961 | { | |
73507e6c | 1962 | reschedule_timeout(MAXTIMEOUT, "do wakeup"); |
1da177e4 LT |
1963 | cont = NULL; |
1964 | command_status += 2; | |
1965 | wake_up(&command_done); | |
1966 | } | |
1967 | ||
3b06c21e | 1968 | static const struct cont_t wakeup_cont = { |
1da177e4 LT |
1969 | .interrupt = empty, |
1970 | .redo = do_wakeup, | |
1971 | .error = empty, | |
06f748c4 | 1972 | .done = (done_f)empty |
1da177e4 LT |
1973 | }; |
1974 | ||
3b06c21e | 1975 | static const struct cont_t intr_cont = { |
1da177e4 LT |
1976 | .interrupt = empty, |
1977 | .redo = process_fd_request, | |
1978 | .error = empty, | |
06f748c4 | 1979 | .done = (done_f)empty |
1da177e4 LT |
1980 | }; |
1981 | ||
74f63f46 | 1982 | static int wait_til_done(void (*handler)(void), bool interruptible) |
1da177e4 LT |
1983 | { |
1984 | int ret; | |
1985 | ||
1986 | schedule_bh(handler); | |
1987 | ||
b862f26f SH |
1988 | if (interruptible) |
1989 | wait_event_interruptible(command_done, command_status >= 2); | |
1990 | else | |
1991 | wait_event(command_done, command_status >= 2); | |
1da177e4 LT |
1992 | |
1993 | if (command_status < 2) { | |
1994 | cancel_activity(); | |
1995 | cont = &intr_cont; | |
1996 | reset_fdc(); | |
1997 | return -EINTR; | |
1998 | } | |
1999 | ||
de6048b8 | 2000 | if (fdc_state[fdc].reset) |
1da177e4 LT |
2001 | command_status = FD_COMMAND_ERROR; |
2002 | if (command_status == FD_COMMAND_OKAY) | |
2003 | ret = 0; | |
2004 | else | |
2005 | ret = -EIO; | |
2006 | command_status = FD_COMMAND_NONE; | |
2007 | return ret; | |
2008 | } | |
2009 | ||
2010 | static void generic_done(int result) | |
2011 | { | |
2012 | command_status = result; | |
2013 | cont = &wakeup_cont; | |
2014 | } | |
2015 | ||
2016 | static void generic_success(void) | |
2017 | { | |
2018 | cont->done(1); | |
2019 | } | |
2020 | ||
2021 | static void generic_failure(void) | |
2022 | { | |
2023 | cont->done(0); | |
2024 | } | |
2025 | ||
2026 | static void success_and_wakeup(void) | |
2027 | { | |
2028 | generic_success(); | |
2029 | cont->redo(); | |
2030 | } | |
2031 | ||
2032 | /* | |
2033 | * formatting and rw support. | |
2034 | * ========================== | |
2035 | */ | |
2036 | ||
2037 | static int next_valid_format(void) | |
2038 | { | |
2039 | int probed_format; | |
2040 | ||
2041 | probed_format = DRS->probed_format; | |
2042 | while (1) { | |
031faabd | 2043 | if (probed_format >= 8 || !drive_params[current_drive].autodetect[probed_format]) { |
1da177e4 LT |
2044 | DRS->probed_format = 0; |
2045 | return 1; | |
2046 | } | |
031faabd | 2047 | if (floppy_type[drive_params[current_drive].autodetect[probed_format]].sect) { |
1da177e4 LT |
2048 | DRS->probed_format = probed_format; |
2049 | return 0; | |
2050 | } | |
2051 | probed_format++; | |
2052 | } | |
2053 | } | |
2054 | ||
2055 | static void bad_flp_intr(void) | |
2056 | { | |
2057 | int err_count; | |
2058 | ||
2059 | if (probing) { | |
2060 | DRS->probed_format++; | |
2061 | if (!next_valid_format()) | |
2062 | return; | |
2063 | } | |
2064 | err_count = ++(*errors); | |
2065 | INFBOUND(DRWE->badness, err_count); | |
031faabd | 2066 | if (err_count > drive_params[current_drive].max_errors.abort) |
1da177e4 | 2067 | cont->done(0); |
031faabd | 2068 | if (err_count > drive_params[current_drive].max_errors.reset) |
de6048b8 | 2069 | fdc_state[fdc].reset = 1; |
031faabd | 2070 | else if (err_count > drive_params[current_drive].max_errors.recal) |
1da177e4 LT |
2071 | DRS->track = NEED_2_RECAL; |
2072 | } | |
2073 | ||
2074 | static void set_floppy(int drive) | |
2075 | { | |
8d9d34e2 | 2076 | int type = ITYPE(drive_state[drive].fd_device); |
06f748c4 | 2077 | |
1da177e4 LT |
2078 | if (type) |
2079 | _floppy = floppy_type + type; | |
2080 | else | |
2081 | _floppy = current_type[drive]; | |
2082 | } | |
2083 | ||
2084 | /* | |
2085 | * formatting support. | |
2086 | * =================== | |
2087 | */ | |
2088 | static void format_interrupt(void) | |
2089 | { | |
2090 | switch (interpret_errors()) { | |
2091 | case 1: | |
2092 | cont->error(); | |
2093 | case 2: | |
2094 | break; | |
2095 | case 0: | |
2096 | cont->done(1); | |
2097 | } | |
2098 | cont->redo(); | |
2099 | } | |
2100 | ||
48c8cee6 | 2101 | #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) |
1da177e4 | 2102 | #define CT(x) ((x) | 0xc0) |
48c8cee6 | 2103 | |
1da177e4 LT |
2104 | static void setup_format_params(int track) |
2105 | { | |
06f748c4 JJ |
2106 | int n; |
2107 | int il; | |
2108 | int count; | |
2109 | int head_shift; | |
2110 | int track_shift; | |
1da177e4 LT |
2111 | struct fparm { |
2112 | unsigned char track, head, sect, size; | |
2113 | } *here = (struct fparm *)floppy_track_buffer; | |
1da177e4 LT |
2114 | |
2115 | raw_cmd = &default_raw_cmd; | |
2116 | raw_cmd->track = track; | |
2117 | ||
48c8cee6 JP |
2118 | raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | |
2119 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); | |
1da177e4 LT |
2120 | raw_cmd->rate = _floppy->rate & 0x43; |
2121 | raw_cmd->cmd_count = NR_F; | |
2122 | COMMAND = FM_MODE(_floppy, FD_FORMAT); | |
2123 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); | |
2124 | F_SIZECODE = FD_SIZECODE(_floppy); | |
2125 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; | |
2126 | F_GAP = _floppy->fmt_gap; | |
2127 | F_FILL = FD_FILL_BYTE; | |
2128 | ||
2129 | raw_cmd->kernel_data = floppy_track_buffer; | |
2130 | raw_cmd->length = 4 * F_SECT_PER_TRACK; | |
2131 | ||
f3554aeb DE |
2132 | if (!F_SECT_PER_TRACK) |
2133 | return; | |
2134 | ||
1da177e4 LT |
2135 | /* allow for about 30ms for data transport per track */ |
2136 | head_shift = (F_SECT_PER_TRACK + 5) / 6; | |
2137 | ||
2138 | /* a ``cylinder'' is two tracks plus a little stepping time */ | |
2139 | track_shift = 2 * head_shift + 3; | |
2140 | ||
2141 | /* position of logical sector 1 on this track */ | |
2142 | n = (track_shift * format_req.track + head_shift * format_req.head) | |
2143 | % F_SECT_PER_TRACK; | |
2144 | ||
2145 | /* determine interleave */ | |
2146 | il = 1; | |
2147 | if (_floppy->fmt_gap < 0x22) | |
2148 | il++; | |
2149 | ||
2150 | /* initialize field */ | |
2151 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { | |
2152 | here[count].track = format_req.track; | |
2153 | here[count].head = format_req.head; | |
2154 | here[count].sect = 0; | |
2155 | here[count].size = F_SIZECODE; | |
2156 | } | |
2157 | /* place logical sectors */ | |
2158 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { | |
2159 | here[n].sect = count; | |
2160 | n = (n + il) % F_SECT_PER_TRACK; | |
2161 | if (here[n].sect) { /* sector busy, find next free sector */ | |
2162 | ++n; | |
2163 | if (n >= F_SECT_PER_TRACK) { | |
2164 | n -= F_SECT_PER_TRACK; | |
2165 | while (here[n].sect) | |
2166 | ++n; | |
2167 | } | |
2168 | } | |
2169 | } | |
9e49184c | 2170 | if (_floppy->stretch & FD_SECTBASEMASK) { |
1da177e4 | 2171 | for (count = 0; count < F_SECT_PER_TRACK; count++) |
9e49184c | 2172 | here[count].sect += FD_SECTBASE(_floppy) - 1; |
1da177e4 LT |
2173 | } |
2174 | } | |
2175 | ||
2176 | static void redo_format(void) | |
2177 | { | |
2178 | buffer_track = -1; | |
2179 | setup_format_params(format_req.track << STRETCH(_floppy)); | |
2180 | floppy_start(); | |
ded2863d | 2181 | debugt(__func__, "queue format request"); |
1da177e4 LT |
2182 | } |
2183 | ||
3b06c21e | 2184 | static const struct cont_t format_cont = { |
1da177e4 LT |
2185 | .interrupt = format_interrupt, |
2186 | .redo = redo_format, | |
2187 | .error = bad_flp_intr, | |
2188 | .done = generic_done | |
2189 | }; | |
2190 | ||
2191 | static int do_format(int drive, struct format_descr *tmp_format_req) | |
2192 | { | |
2193 | int ret; | |
2194 | ||
a0c80efe | 2195 | if (lock_fdc(drive)) |
52a0d61f JP |
2196 | return -EINTR; |
2197 | ||
1da177e4 LT |
2198 | set_floppy(drive); |
2199 | if (!_floppy || | |
031faabd | 2200 | _floppy->track > drive_params[current_drive].tracks || |
1da177e4 LT |
2201 | tmp_format_req->track >= _floppy->track || |
2202 | tmp_format_req->head >= _floppy->head || | |
2203 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || | |
2204 | !_floppy->fmt_gap) { | |
2205 | process_fd_request(); | |
2206 | return -EINVAL; | |
2207 | } | |
2208 | format_req = *tmp_format_req; | |
2209 | format_errors = 0; | |
2210 | cont = &format_cont; | |
2211 | errors = &format_errors; | |
74f63f46 | 2212 | ret = wait_til_done(redo_format, true); |
55eee80c JP |
2213 | if (ret == -EINTR) |
2214 | return -EINTR; | |
1da177e4 LT |
2215 | process_fd_request(); |
2216 | return ret; | |
2217 | } | |
2218 | ||
2219 | /* | |
2220 | * Buffer read/write and support | |
2221 | * ============================= | |
2222 | */ | |
2223 | ||
2a842aca | 2224 | static void floppy_end_request(struct request *req, blk_status_t error) |
1da177e4 LT |
2225 | { |
2226 | unsigned int nr_sectors = current_count_sectors; | |
1c5093ba | 2227 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
1da177e4 LT |
2228 | |
2229 | /* current_count_sectors can be zero if transfer failed */ | |
1c5093ba | 2230 | if (error) |
83096ebf | 2231 | nr_sectors = blk_rq_cur_sectors(req); |
a9f38e1d | 2232 | if (blk_update_request(req, error, nr_sectors << 9)) |
1da177e4 | 2233 | return; |
a9f38e1d | 2234 | __blk_mq_end_request(req, error); |
1da177e4 LT |
2235 | |
2236 | /* We're done with the request */ | |
1c5093ba | 2237 | floppy_off(drive); |
1da177e4 LT |
2238 | current_req = NULL; |
2239 | } | |
2240 | ||
2241 | /* new request_done. Can handle physical sectors which are smaller than a | |
2242 | * logical buffer */ | |
2243 | static void request_done(int uptodate) | |
2244 | { | |
1da177e4 | 2245 | struct request *req = current_req; |
1da177e4 | 2246 | int block; |
73507e6c | 2247 | char msg[sizeof("request done ") + sizeof(int) * 3]; |
1da177e4 LT |
2248 | |
2249 | probing = 0; | |
73507e6c JP |
2250 | snprintf(msg, sizeof(msg), "request done %d", uptodate); |
2251 | reschedule_timeout(MAXTIMEOUT, msg); | |
1da177e4 LT |
2252 | |
2253 | if (!req) { | |
b46df356 | 2254 | pr_info("floppy.c: no request in request_done\n"); |
1da177e4 LT |
2255 | return; |
2256 | } | |
2257 | ||
2258 | if (uptodate) { | |
2259 | /* maintain values for invalidation on geometry | |
2260 | * change */ | |
83096ebf | 2261 | block = current_count_sectors + blk_rq_pos(req); |
1da177e4 LT |
2262 | INFBOUND(DRS->maxblock, block); |
2263 | if (block > _floppy->sect) | |
2264 | DRS->maxtrack = 1; | |
2265 | ||
1c5093ba | 2266 | floppy_end_request(req, 0); |
1da177e4 LT |
2267 | } else { |
2268 | if (rq_data_dir(req) == WRITE) { | |
2269 | /* record write error information */ | |
2270 | DRWE->write_errors++; | |
2271 | if (DRWE->write_errors == 1) { | |
83096ebf | 2272 | DRWE->first_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2273 | DRWE->first_error_generation = DRS->generation; |
2274 | } | |
83096ebf | 2275 | DRWE->last_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2276 | DRWE->last_error_generation = DRS->generation; |
2277 | } | |
2a842aca | 2278 | floppy_end_request(req, BLK_STS_IOERR); |
1da177e4 LT |
2279 | } |
2280 | } | |
2281 | ||
2282 | /* Interrupt handler evaluating the result of the r/w operation */ | |
2283 | static void rw_interrupt(void) | |
2284 | { | |
06f748c4 JJ |
2285 | int eoc; |
2286 | int ssize; | |
2287 | int heads; | |
2288 | int nr_sectors; | |
1da177e4 LT |
2289 | |
2290 | if (R_HEAD >= 2) { | |
2291 | /* some Toshiba floppy controllers occasionnally seem to | |
2292 | * return bogus interrupts after read/write operations, which | |
2293 | * can be recognized by a bad head number (>= 2) */ | |
2294 | return; | |
2295 | } | |
2296 | ||
2297 | if (!DRS->first_read_date) | |
2298 | DRS->first_read_date = jiffies; | |
2299 | ||
2300 | nr_sectors = 0; | |
712e1de4 | 2301 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2302 | |
2303 | if (ST1 & ST1_EOC) | |
2304 | eoc = 1; | |
2305 | else | |
2306 | eoc = 0; | |
2307 | ||
2308 | if (COMMAND & 0x80) | |
2309 | heads = 2; | |
2310 | else | |
2311 | heads = 1; | |
2312 | ||
2313 | nr_sectors = (((R_TRACK - TRACK) * heads + | |
2314 | R_HEAD - HEAD) * SECT_PER_TRACK + | |
2315 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; | |
2316 | ||
1da177e4 | 2317 | if (nr_sectors / ssize > |
061837bc | 2318 | DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
1da177e4 LT |
2319 | DPRINT("long rw: %x instead of %lx\n", |
2320 | nr_sectors, current_count_sectors); | |
b46df356 JP |
2321 | pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); |
2322 | pr_info("rh=%d h=%d\n", R_HEAD, HEAD); | |
2323 | pr_info("rt=%d t=%d\n", R_TRACK, TRACK); | |
2324 | pr_info("heads=%d eoc=%d\n", heads, eoc); | |
2325 | pr_info("spt=%d st=%d ss=%d\n", | |
2326 | SECT_PER_TRACK, fsector_t, ssize); | |
2327 | pr_info("in_sector_offset=%d\n", in_sector_offset); | |
1da177e4 | 2328 | } |
1da177e4 LT |
2329 | |
2330 | nr_sectors -= in_sector_offset; | |
2331 | INFBOUND(nr_sectors, 0); | |
2332 | SUPBOUND(current_count_sectors, nr_sectors); | |
2333 | ||
2334 | switch (interpret_errors()) { | |
2335 | case 2: | |
2336 | cont->redo(); | |
2337 | return; | |
2338 | case 1: | |
2339 | if (!current_count_sectors) { | |
2340 | cont->error(); | |
2341 | cont->redo(); | |
2342 | return; | |
2343 | } | |
2344 | break; | |
2345 | case 0: | |
2346 | if (!current_count_sectors) { | |
2347 | cont->redo(); | |
2348 | return; | |
2349 | } | |
2350 | current_type[current_drive] = _floppy; | |
2351 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2352 | break; | |
2353 | } | |
2354 | ||
2355 | if (probing) { | |
031faabd | 2356 | if (drive_params[current_drive].flags & FTD_MSG) |
1da177e4 LT |
2357 | DPRINT("Auto-detected floppy type %s in fd%d\n", |
2358 | _floppy->name, current_drive); | |
2359 | current_type[current_drive] = _floppy; | |
2360 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2361 | probing = 0; | |
2362 | } | |
2363 | ||
2364 | if (CT(COMMAND) != FD_READ || | |
b4f42e28 | 2365 | raw_cmd->kernel_data == bio_data(current_req->bio)) { |
1da177e4 LT |
2366 | /* transfer directly from buffer */ |
2367 | cont->done(1); | |
2368 | } else if (CT(COMMAND) == FD_READ) { | |
2369 | buffer_track = raw_cmd->track; | |
2370 | buffer_drive = current_drive; | |
2371 | INFBOUND(buffer_max, nr_sectors + fsector_t); | |
2372 | } | |
2373 | cont->redo(); | |
2374 | } | |
2375 | ||
2376 | /* Compute maximal contiguous buffer size. */ | |
2377 | static int buffer_chain_size(void) | |
2378 | { | |
7988613b | 2379 | struct bio_vec bv; |
5705f702 N |
2380 | int size; |
2381 | struct req_iterator iter; | |
1da177e4 LT |
2382 | char *base; |
2383 | ||
2384 | base = bio_data(current_req->bio); | |
2385 | size = 0; | |
2386 | ||
5705f702 | 2387 | rq_for_each_segment(bv, current_req, iter) { |
7988613b | 2388 | if (page_address(bv.bv_page) + bv.bv_offset != base + size) |
5705f702 | 2389 | break; |
1da177e4 | 2390 | |
7988613b | 2391 | size += bv.bv_len; |
1da177e4 LT |
2392 | } |
2393 | ||
2394 | return size >> 9; | |
2395 | } | |
2396 | ||
2397 | /* Compute the maximal transfer size */ | |
2398 | static int transfer_size(int ssize, int max_sector, int max_size) | |
2399 | { | |
2400 | SUPBOUND(max_sector, fsector_t + max_size); | |
2401 | ||
2402 | /* alignment */ | |
2403 | max_sector -= (max_sector % _floppy->sect) % ssize; | |
2404 | ||
2405 | /* transfer size, beginning not aligned */ | |
2406 | current_count_sectors = max_sector - fsector_t; | |
2407 | ||
2408 | return max_sector; | |
2409 | } | |
2410 | ||
2411 | /* | |
2412 | * Move data from/to the track buffer to/from the buffer cache. | |
2413 | */ | |
2414 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) | |
2415 | { | |
2416 | int remaining; /* number of transferred 512-byte sectors */ | |
7988613b | 2417 | struct bio_vec bv; |
06f748c4 JJ |
2418 | char *buffer; |
2419 | char *dma_buffer; | |
5705f702 N |
2420 | int size; |
2421 | struct req_iterator iter; | |
1da177e4 LT |
2422 | |
2423 | max_sector = transfer_size(ssize, | |
2424 | min(max_sector, max_sector_2), | |
83096ebf | 2425 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2426 | |
2427 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && | |
83096ebf | 2428 | buffer_max > fsector_t + blk_rq_sectors(current_req)) |
1da177e4 | 2429 | current_count_sectors = min_t(int, buffer_max - fsector_t, |
83096ebf | 2430 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2431 | |
2432 | remaining = current_count_sectors << 9; | |
1011c1b9 | 2433 | if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { |
1da177e4 | 2434 | DPRINT("in copy buffer\n"); |
b46df356 JP |
2435 | pr_info("current_count_sectors=%ld\n", current_count_sectors); |
2436 | pr_info("remaining=%d\n", remaining >> 9); | |
2437 | pr_info("current_req->nr_sectors=%u\n", | |
2438 | blk_rq_sectors(current_req)); | |
2439 | pr_info("current_req->current_nr_sectors=%u\n", | |
2440 | blk_rq_cur_sectors(current_req)); | |
2441 | pr_info("max_sector=%d\n", max_sector); | |
2442 | pr_info("ssize=%d\n", ssize); | |
1da177e4 | 2443 | } |
1da177e4 LT |
2444 | |
2445 | buffer_max = max(max_sector, buffer_max); | |
2446 | ||
2447 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); | |
2448 | ||
1011c1b9 | 2449 | size = blk_rq_cur_bytes(current_req); |
1da177e4 | 2450 | |
5705f702 N |
2451 | rq_for_each_segment(bv, current_req, iter) { |
2452 | if (!remaining) | |
2453 | break; | |
1da177e4 | 2454 | |
7988613b | 2455 | size = bv.bv_len; |
5705f702 | 2456 | SUPBOUND(size, remaining); |
1da177e4 | 2457 | |
7988613b | 2458 | buffer = page_address(bv.bv_page) + bv.bv_offset; |
5705f702 N |
2459 | if (dma_buffer + size > |
2460 | floppy_track_buffer + (max_buffer_sectors << 10) || | |
2461 | dma_buffer < floppy_track_buffer) { | |
2462 | DPRINT("buffer overrun in copy buffer %d\n", | |
b46df356 JP |
2463 | (int)((floppy_track_buffer - dma_buffer) >> 9)); |
2464 | pr_info("fsector_t=%d buffer_min=%d\n", | |
2465 | fsector_t, buffer_min); | |
2466 | pr_info("current_count_sectors=%ld\n", | |
2467 | current_count_sectors); | |
1da177e4 | 2468 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2469 | pr_info("read\n"); |
5705f702 | 2470 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2471 | pr_info("write\n"); |
5705f702 | 2472 | break; |
1da177e4 | 2473 | } |
5705f702 N |
2474 | if (((unsigned long)buffer) % 512) |
2475 | DPRINT("%p buffer not aligned\n", buffer); | |
1a23d133 | 2476 | |
5705f702 N |
2477 | if (CT(COMMAND) == FD_READ) |
2478 | memcpy(buffer, dma_buffer, size); | |
2479 | else | |
2480 | memcpy(dma_buffer, buffer, size); | |
2481 | ||
2482 | remaining -= size; | |
2483 | dma_buffer += size; | |
1da177e4 | 2484 | } |
1da177e4 LT |
2485 | if (remaining) { |
2486 | if (remaining > 0) | |
2487 | max_sector -= remaining >> 9; | |
2488 | DPRINT("weirdness: remaining %d\n", remaining >> 9); | |
2489 | } | |
1da177e4 LT |
2490 | } |
2491 | ||
1da177e4 LT |
2492 | /* work around a bug in pseudo DMA |
2493 | * (on some FDCs) pseudo DMA does not stop when the CPU stops | |
2494 | * sending data. Hence we need a different way to signal the | |
2495 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this | |
2496 | * does not work with MT, hence we can only transfer one head at | |
2497 | * a time | |
2498 | */ | |
2499 | static void virtualdmabug_workaround(void) | |
2500 | { | |
06f748c4 JJ |
2501 | int hard_sectors; |
2502 | int end_sector; | |
1da177e4 LT |
2503 | |
2504 | if (CT(COMMAND) == FD_WRITE) { | |
2505 | COMMAND &= ~0x80; /* switch off multiple track mode */ | |
2506 | ||
2507 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); | |
2508 | end_sector = SECTOR + hard_sectors - 1; | |
1da177e4 | 2509 | if (end_sector > SECT_PER_TRACK) { |
b46df356 JP |
2510 | pr_info("too many sectors %d > %d\n", |
2511 | end_sector, SECT_PER_TRACK); | |
1da177e4 LT |
2512 | return; |
2513 | } | |
48c8cee6 JP |
2514 | SECT_PER_TRACK = end_sector; |
2515 | /* make sure SECT_PER_TRACK | |
2516 | * points to end of transfer */ | |
1da177e4 LT |
2517 | } |
2518 | } | |
2519 | ||
2520 | /* | |
2521 | * Formulate a read/write request. | |
2522 | * this routine decides where to load the data (directly to buffer, or to | |
2523 | * tmp floppy area), how much data to load (the size of the buffer, the whole | |
2524 | * track, or a single sector) | |
2525 | * All floppy_track_buffer handling goes in here. If we ever add track buffer | |
2526 | * allocation on the fly, it should be done here. No other part should need | |
2527 | * modification. | |
2528 | */ | |
2529 | ||
2530 | static int make_raw_rw_request(void) | |
2531 | { | |
2532 | int aligned_sector_t; | |
06f748c4 JJ |
2533 | int max_sector; |
2534 | int max_size; | |
2535 | int tracksize; | |
2536 | int ssize; | |
1da177e4 | 2537 | |
01b6b67e | 2538 | if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) |
1da177e4 | 2539 | return 0; |
1da177e4 LT |
2540 | |
2541 | set_fdc((long)current_req->rq_disk->private_data); | |
2542 | ||
2543 | raw_cmd = &default_raw_cmd; | |
2fb2ca6f | 2544 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; |
1da177e4 LT |
2545 | raw_cmd->cmd_count = NR_RW; |
2546 | if (rq_data_dir(current_req) == READ) { | |
2547 | raw_cmd->flags |= FD_RAW_READ; | |
2548 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2549 | } else if (rq_data_dir(current_req) == WRITE) { | |
2550 | raw_cmd->flags |= FD_RAW_WRITE; | |
2551 | COMMAND = FM_MODE(_floppy, FD_WRITE); | |
2552 | } else { | |
275176bc | 2553 | DPRINT("%s: unknown command\n", __func__); |
1da177e4 LT |
2554 | return 0; |
2555 | } | |
2556 | ||
2557 | max_sector = _floppy->sect * _floppy->head; | |
2558 | ||
83096ebf TH |
2559 | TRACK = (int)blk_rq_pos(current_req) / max_sector; |
2560 | fsector_t = (int)blk_rq_pos(current_req) % max_sector; | |
1da177e4 | 2561 | if (_floppy->track && TRACK >= _floppy->track) { |
83096ebf | 2562 | if (blk_rq_cur_sectors(current_req) & 1) { |
1da177e4 LT |
2563 | current_count_sectors = 1; |
2564 | return 1; | |
2565 | } else | |
2566 | return 0; | |
2567 | } | |
2568 | HEAD = fsector_t / _floppy->sect; | |
2569 | ||
9e49184c | 2570 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
e0298536 JP |
2571 | test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && |
2572 | fsector_t < _floppy->sect) | |
1da177e4 LT |
2573 | max_sector = _floppy->sect; |
2574 | ||
2575 | /* 2M disks have phantom sectors on the first track */ | |
2576 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { | |
2577 | max_sector = 2 * _floppy->sect / 3; | |
2578 | if (fsector_t >= max_sector) { | |
2579 | current_count_sectors = | |
2580 | min_t(int, _floppy->sect - fsector_t, | |
83096ebf | 2581 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2582 | return 1; |
2583 | } | |
2584 | SIZECODE = 2; | |
2585 | } else | |
2586 | SIZECODE = FD_SIZECODE(_floppy); | |
2587 | raw_cmd->rate = _floppy->rate & 0x43; | |
2588 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) | |
2589 | raw_cmd->rate = 1; | |
2590 | ||
2591 | if (SIZECODE) | |
2592 | SIZECODE2 = 0xff; | |
2593 | else | |
2594 | SIZECODE2 = 0x80; | |
2595 | raw_cmd->track = TRACK << STRETCH(_floppy); | |
2596 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); | |
2597 | GAP = _floppy->gap; | |
712e1de4 | 2598 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2599 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; |
2600 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + | |
9e49184c | 2601 | FD_SECTBASE(_floppy); |
1da177e4 LT |
2602 | |
2603 | /* tracksize describes the size which can be filled up with sectors | |
2604 | * of size ssize. | |
2605 | */ | |
2606 | tracksize = _floppy->sect - _floppy->sect % ssize; | |
2607 | if (tracksize < _floppy->sect) { | |
2608 | SECT_PER_TRACK++; | |
2609 | if (tracksize <= fsector_t % _floppy->sect) | |
2610 | SECTOR--; | |
2611 | ||
2612 | /* if we are beyond tracksize, fill up using smaller sectors */ | |
2613 | while (tracksize <= fsector_t % _floppy->sect) { | |
2614 | while (tracksize + ssize > _floppy->sect) { | |
2615 | SIZECODE--; | |
2616 | ssize >>= 1; | |
2617 | } | |
2618 | SECTOR++; | |
2619 | SECT_PER_TRACK++; | |
2620 | tracksize += ssize; | |
2621 | } | |
2622 | max_sector = HEAD * _floppy->sect + tracksize; | |
2623 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { | |
2624 | max_sector = _floppy->sect; | |
2625 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { | |
2626 | /* for virtual DMA bug workaround */ | |
2627 | max_sector = _floppy->sect; | |
2628 | } | |
2629 | ||
2630 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; | |
2631 | aligned_sector_t = fsector_t - in_sector_offset; | |
83096ebf | 2632 | max_size = blk_rq_sectors(current_req); |
1da177e4 LT |
2633 | if ((raw_cmd->track == buffer_track) && |
2634 | (current_drive == buffer_drive) && | |
2635 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { | |
2636 | /* data already in track buffer */ | |
2637 | if (CT(COMMAND) == FD_READ) { | |
2638 | copy_buffer(1, max_sector, buffer_max); | |
2639 | return 1; | |
2640 | } | |
83096ebf | 2641 | } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { |
1da177e4 | 2642 | if (CT(COMMAND) == FD_WRITE) { |
d7b2b2ec JP |
2643 | unsigned int sectors; |
2644 | ||
2645 | sectors = fsector_t + blk_rq_sectors(current_req); | |
2646 | if (sectors > ssize && sectors < ssize + ssize) | |
1da177e4 LT |
2647 | max_size = ssize + ssize; |
2648 | else | |
2649 | max_size = ssize; | |
2650 | } | |
2651 | raw_cmd->flags &= ~FD_RAW_WRITE; | |
2652 | raw_cmd->flags |= FD_RAW_READ; | |
2653 | COMMAND = FM_MODE(_floppy, FD_READ); | |
b4f42e28 | 2654 | } else if ((unsigned long)bio_data(current_req->bio) < MAX_DMA_ADDRESS) { |
1da177e4 LT |
2655 | unsigned long dma_limit; |
2656 | int direct, indirect; | |
2657 | ||
2658 | indirect = | |
2659 | transfer_size(ssize, max_sector, | |
2660 | max_buffer_sectors * 2) - fsector_t; | |
2661 | ||
2662 | /* | |
2663 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide | |
2664 | * on a 64 bit machine! | |
2665 | */ | |
2666 | max_size = buffer_chain_size(); | |
d7b2b2ec | 2667 | dma_limit = (MAX_DMA_ADDRESS - |
b4f42e28 | 2668 | ((unsigned long)bio_data(current_req->bio))) >> 9; |
a81ee544 | 2669 | if ((unsigned long)max_size > dma_limit) |
1da177e4 | 2670 | max_size = dma_limit; |
1da177e4 | 2671 | /* 64 kb boundaries */ |
b4f42e28 | 2672 | if (CROSS_64KB(bio_data(current_req->bio), max_size << 9)) |
1da177e4 | 2673 | max_size = (K_64 - |
b4f42e28 | 2674 | ((unsigned long)bio_data(current_req->bio)) % |
1da177e4 LT |
2675 | K_64) >> 9; |
2676 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; | |
2677 | /* | |
2678 | * We try to read tracks, but if we get too many errors, we | |
2679 | * go back to reading just one sector at a time. | |
2680 | * | |
2681 | * This means we should be able to read a sector even if there | |
2682 | * are other bad sectors on this track. | |
2683 | */ | |
2684 | if (!direct || | |
2685 | (indirect * 2 > direct * 3 && | |
031faabd | 2686 | *errors < drive_params[current_drive].max_errors.read_track && |
d7b2b2ec | 2687 | ((!probing || |
031faabd | 2688 | (drive_params[current_drive].read_track & (1 << DRS->probed_format)))))) { |
83096ebf | 2689 | max_size = blk_rq_sectors(current_req); |
1da177e4 | 2690 | } else { |
b4f42e28 | 2691 | raw_cmd->kernel_data = bio_data(current_req->bio); |
1da177e4 LT |
2692 | raw_cmd->length = current_count_sectors << 9; |
2693 | if (raw_cmd->length == 0) { | |
275176bc | 2694 | DPRINT("%s: zero dma transfer attempted\n", __func__); |
d7b2b2ec | 2695 | DPRINT("indirect=%d direct=%d fsector_t=%d\n", |
1da177e4 LT |
2696 | indirect, direct, fsector_t); |
2697 | return 0; | |
2698 | } | |
1da177e4 LT |
2699 | virtualdmabug_workaround(); |
2700 | return 2; | |
2701 | } | |
2702 | } | |
2703 | ||
2704 | if (CT(COMMAND) == FD_READ) | |
2705 | max_size = max_sector; /* unbounded */ | |
2706 | ||
2707 | /* claim buffer track if needed */ | |
2708 | if (buffer_track != raw_cmd->track || /* bad track */ | |
2709 | buffer_drive != current_drive || /* bad drive */ | |
2710 | fsector_t > buffer_max || | |
2711 | fsector_t < buffer_min || | |
2712 | ((CT(COMMAND) == FD_READ || | |
83096ebf | 2713 | (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && |
1da177e4 | 2714 | max_sector > 2 * max_buffer_sectors + buffer_min && |
bb57f0c6 JP |
2715 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { |
2716 | /* not enough space */ | |
1da177e4 LT |
2717 | buffer_track = -1; |
2718 | buffer_drive = current_drive; | |
2719 | buffer_max = buffer_min = aligned_sector_t; | |
2720 | } | |
2721 | raw_cmd->kernel_data = floppy_track_buffer + | |
bb57f0c6 | 2722 | ((aligned_sector_t - buffer_min) << 9); |
1da177e4 LT |
2723 | |
2724 | if (CT(COMMAND) == FD_WRITE) { | |
2725 | /* copy write buffer to track buffer. | |
2726 | * if we get here, we know that the write | |
2727 | * is either aligned or the data already in the buffer | |
2728 | * (buffer will be overwritten) */ | |
1da177e4 LT |
2729 | if (in_sector_offset && buffer_track == -1) |
2730 | DPRINT("internal error offset !=0 on write\n"); | |
1da177e4 LT |
2731 | buffer_track = raw_cmd->track; |
2732 | buffer_drive = current_drive; | |
2733 | copy_buffer(ssize, max_sector, | |
2734 | 2 * max_buffer_sectors + buffer_min); | |
2735 | } else | |
2736 | transfer_size(ssize, max_sector, | |
2737 | 2 * max_buffer_sectors + buffer_min - | |
2738 | aligned_sector_t); | |
2739 | ||
2740 | /* round up current_count_sectors to get dma xfer size */ | |
2741 | raw_cmd->length = in_sector_offset + current_count_sectors; | |
2742 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; | |
2743 | raw_cmd->length <<= 9; | |
1da177e4 | 2744 | if ((raw_cmd->length < current_count_sectors << 9) || |
b4f42e28 | 2745 | (raw_cmd->kernel_data != bio_data(current_req->bio) && |
1da177e4 LT |
2746 | CT(COMMAND) == FD_WRITE && |
2747 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || | |
2748 | aligned_sector_t < buffer_min)) || | |
2749 | raw_cmd->length % (128 << SIZECODE) || | |
2750 | raw_cmd->length <= 0 || current_count_sectors <= 0) { | |
2751 | DPRINT("fractionary current count b=%lx s=%lx\n", | |
2752 | raw_cmd->length, current_count_sectors); | |
b4f42e28 | 2753 | if (raw_cmd->kernel_data != bio_data(current_req->bio)) |
b46df356 JP |
2754 | pr_info("addr=%d, length=%ld\n", |
2755 | (int)((raw_cmd->kernel_data - | |
2756 | floppy_track_buffer) >> 9), | |
2757 | current_count_sectors); | |
2758 | pr_info("st=%d ast=%d mse=%d msi=%d\n", | |
2759 | fsector_t, aligned_sector_t, max_sector, max_size); | |
2760 | pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); | |
2761 | pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", | |
2762 | COMMAND, SECTOR, HEAD, TRACK); | |
2763 | pr_info("buffer drive=%d\n", buffer_drive); | |
2764 | pr_info("buffer track=%d\n", buffer_track); | |
2765 | pr_info("buffer_min=%d\n", buffer_min); | |
2766 | pr_info("buffer_max=%d\n", buffer_max); | |
1da177e4 LT |
2767 | return 0; |
2768 | } | |
2769 | ||
b4f42e28 | 2770 | if (raw_cmd->kernel_data != bio_data(current_req->bio)) { |
1da177e4 LT |
2771 | if (raw_cmd->kernel_data < floppy_track_buffer || |
2772 | current_count_sectors < 0 || | |
2773 | raw_cmd->length < 0 || | |
2774 | raw_cmd->kernel_data + raw_cmd->length > | |
2775 | floppy_track_buffer + (max_buffer_sectors << 10)) { | |
2776 | DPRINT("buffer overrun in schedule dma\n"); | |
b46df356 JP |
2777 | pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", |
2778 | fsector_t, buffer_min, raw_cmd->length >> 9); | |
2779 | pr_info("current_count_sectors=%ld\n", | |
2780 | current_count_sectors); | |
1da177e4 | 2781 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2782 | pr_info("read\n"); |
1da177e4 | 2783 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2784 | pr_info("write\n"); |
1da177e4 LT |
2785 | return 0; |
2786 | } | |
1011c1b9 | 2787 | } else if (raw_cmd->length > blk_rq_bytes(current_req) || |
83096ebf | 2788 | current_count_sectors > blk_rq_sectors(current_req)) { |
1da177e4 LT |
2789 | DPRINT("buffer overrun in direct transfer\n"); |
2790 | return 0; | |
2791 | } else if (raw_cmd->length < current_count_sectors << 9) { | |
2792 | DPRINT("more sectors than bytes\n"); | |
b46df356 JP |
2793 | pr_info("bytes=%ld\n", raw_cmd->length >> 9); |
2794 | pr_info("sectors=%ld\n", current_count_sectors); | |
1da177e4 LT |
2795 | } |
2796 | if (raw_cmd->length == 0) { | |
2797 | DPRINT("zero dma transfer attempted from make_raw_request\n"); | |
2798 | return 0; | |
2799 | } | |
1da177e4 LT |
2800 | |
2801 | virtualdmabug_workaround(); | |
2802 | return 2; | |
2803 | } | |
2804 | ||
48821184 JA |
2805 | static int set_next_request(void) |
2806 | { | |
a9f38e1d OS |
2807 | current_req = list_first_entry_or_null(&floppy_reqs, struct request, |
2808 | queuelist); | |
2809 | if (current_req) { | |
2810 | current_req->error_count = 0; | |
2811 | list_del_init(¤t_req->queuelist); | |
2812 | } | |
48821184 JA |
2813 | return current_req != NULL; |
2814 | } | |
2815 | ||
1da177e4 LT |
2816 | static void redo_fd_request(void) |
2817 | { | |
1da177e4 LT |
2818 | int drive; |
2819 | int tmp; | |
2820 | ||
2821 | lastredo = jiffies; | |
2822 | if (current_drive < N_DRIVE) | |
2823 | floppy_off(current_drive); | |
2824 | ||
0da3132f JP |
2825 | do_request: |
2826 | if (!current_req) { | |
48821184 JA |
2827 | int pending; |
2828 | ||
2829 | spin_lock_irq(&floppy_lock); | |
2830 | pending = set_next_request(); | |
2831 | spin_unlock_irq(&floppy_lock); | |
48821184 | 2832 | if (!pending) { |
0da3132f JP |
2833 | do_floppy = NULL; |
2834 | unlock_fdc(); | |
1da177e4 | 2835 | return; |
1da177e4 | 2836 | } |
0da3132f JP |
2837 | } |
2838 | drive = (long)current_req->rq_disk->private_data; | |
2839 | set_fdc(drive); | |
73507e6c | 2840 | reschedule_timeout(current_reqD, "redo fd request"); |
1da177e4 | 2841 | |
0da3132f JP |
2842 | set_floppy(drive); |
2843 | raw_cmd = &default_raw_cmd; | |
2844 | raw_cmd->flags = 0; | |
2845 | if (start_motor(redo_fd_request)) | |
1da177e4 | 2846 | return; |
0da3132f JP |
2847 | |
2848 | disk_change(current_drive); | |
2849 | if (test_bit(current_drive, &fake_change) || | |
2850 | test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { | |
2851 | DPRINT("disk absent or changed during operation\n"); | |
2852 | request_done(0); | |
2853 | goto do_request; | |
2854 | } | |
2855 | if (!_floppy) { /* Autodetection */ | |
2856 | if (!probing) { | |
2857 | DRS->probed_format = 0; | |
2858 | if (next_valid_format()) { | |
2859 | DPRINT("no autodetectable formats\n"); | |
2860 | _floppy = NULL; | |
2861 | request_done(0); | |
2862 | goto do_request; | |
2863 | } | |
2864 | } | |
2865 | probing = 1; | |
031faabd | 2866 | _floppy = floppy_type + drive_params[current_drive].autodetect[DRS->probed_format]; |
0da3132f JP |
2867 | } else |
2868 | probing = 0; | |
45908795 | 2869 | errors = &(current_req->error_count); |
0da3132f JP |
2870 | tmp = make_raw_rw_request(); |
2871 | if (tmp < 2) { | |
2872 | request_done(tmp); | |
2873 | goto do_request; | |
1da177e4 | 2874 | } |
0da3132f JP |
2875 | |
2876 | if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) | |
2877 | twaddle(); | |
2878 | schedule_bh(floppy_start); | |
ded2863d | 2879 | debugt(__func__, "queue fd request"); |
0da3132f | 2880 | return; |
1da177e4 LT |
2881 | } |
2882 | ||
3b06c21e | 2883 | static const struct cont_t rw_cont = { |
1da177e4 LT |
2884 | .interrupt = rw_interrupt, |
2885 | .redo = redo_fd_request, | |
2886 | .error = bad_flp_intr, | |
2887 | .done = request_done | |
2888 | }; | |
2889 | ||
2890 | static void process_fd_request(void) | |
2891 | { | |
2892 | cont = &rw_cont; | |
2893 | schedule_bh(redo_fd_request); | |
2894 | } | |
2895 | ||
a9f38e1d OS |
2896 | static blk_status_t floppy_queue_rq(struct blk_mq_hw_ctx *hctx, |
2897 | const struct blk_mq_queue_data *bd) | |
1da177e4 | 2898 | { |
a9f38e1d OS |
2899 | blk_mq_start_request(bd->rq); |
2900 | ||
01b6b67e SH |
2901 | if (WARN(max_buffer_sectors == 0, |
2902 | "VFS: %s called on non-open device\n", __func__)) | |
a9f38e1d | 2903 | return BLK_STS_IOERR; |
1da177e4 | 2904 | |
01b6b67e | 2905 | if (WARN(atomic_read(&usage_count) == 0, |
aebf526b CH |
2906 | "warning: usage count=0, current_req=%p sect=%ld flags=%llx\n", |
2907 | current_req, (long)blk_rq_pos(current_req), | |
5953316d | 2908 | (unsigned long long) current_req->cmd_flags)) |
a9f38e1d OS |
2909 | return BLK_STS_IOERR; |
2910 | ||
2911 | spin_lock_irq(&floppy_lock); | |
2912 | list_add_tail(&bd->rq->queuelist, &floppy_reqs); | |
2913 | spin_unlock_irq(&floppy_lock); | |
01b6b67e | 2914 | |
070ad7e7 | 2915 | if (test_and_set_bit(0, &fdc_busy)) { |
1da177e4 LT |
2916 | /* fdc busy, this new request will be treated when the |
2917 | current one is done */ | |
275176bc | 2918 | is_alive(__func__, "old request running"); |
a9f38e1d | 2919 | return BLK_STS_OK; |
1da177e4 | 2920 | } |
a9f38e1d | 2921 | |
070ad7e7 JK |
2922 | command_status = FD_COMMAND_NONE; |
2923 | __reschedule_timeout(MAXTIMEOUT, "fd_request"); | |
2924 | set_fdc(0); | |
1da177e4 | 2925 | process_fd_request(); |
275176bc | 2926 | is_alive(__func__, ""); |
a9f38e1d | 2927 | return BLK_STS_OK; |
1da177e4 LT |
2928 | } |
2929 | ||
3b06c21e | 2930 | static const struct cont_t poll_cont = { |
1da177e4 LT |
2931 | .interrupt = success_and_wakeup, |
2932 | .redo = floppy_ready, | |
2933 | .error = generic_failure, | |
2934 | .done = generic_done | |
2935 | }; | |
2936 | ||
74f63f46 | 2937 | static int poll_drive(bool interruptible, int flag) |
1da177e4 | 2938 | { |
1da177e4 LT |
2939 | /* no auto-sense, just clear dcl */ |
2940 | raw_cmd = &default_raw_cmd; | |
2941 | raw_cmd->flags = flag; | |
2942 | raw_cmd->track = 0; | |
2943 | raw_cmd->cmd_count = 0; | |
2944 | cont = &poll_cont; | |
031faabd WT |
2945 | debug_dcl(drive_params[current_drive].flags, |
2946 | "setting NEWCHANGE in poll_drive\n"); | |
e0298536 | 2947 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
55eee80c JP |
2948 | |
2949 | return wait_til_done(floppy_ready, interruptible); | |
1da177e4 LT |
2950 | } |
2951 | ||
2952 | /* | |
2953 | * User triggered reset | |
2954 | * ==================== | |
2955 | */ | |
2956 | ||
2957 | static void reset_intr(void) | |
2958 | { | |
b46df356 | 2959 | pr_info("weird, reset interrupt called\n"); |
1da177e4 LT |
2960 | } |
2961 | ||
3b06c21e | 2962 | static const struct cont_t reset_cont = { |
1da177e4 LT |
2963 | .interrupt = reset_intr, |
2964 | .redo = success_and_wakeup, | |
2965 | .error = generic_failure, | |
2966 | .done = generic_done | |
2967 | }; | |
2968 | ||
74f63f46 | 2969 | static int user_reset_fdc(int drive, int arg, bool interruptible) |
1da177e4 LT |
2970 | { |
2971 | int ret; | |
2972 | ||
a0c80efe | 2973 | if (lock_fdc(drive)) |
52a0d61f JP |
2974 | return -EINTR; |
2975 | ||
1da177e4 | 2976 | if (arg == FD_RESET_ALWAYS) |
de6048b8 WT |
2977 | fdc_state[fdc].reset = 1; |
2978 | if (fdc_state[fdc].reset) { | |
1da177e4 | 2979 | cont = &reset_cont; |
55eee80c JP |
2980 | ret = wait_til_done(reset_fdc, interruptible); |
2981 | if (ret == -EINTR) | |
2982 | return -EINTR; | |
1da177e4 LT |
2983 | } |
2984 | process_fd_request(); | |
52a0d61f | 2985 | return 0; |
1da177e4 LT |
2986 | } |
2987 | ||
2988 | /* | |
2989 | * Misc Ioctl's and support | |
2990 | * ======================== | |
2991 | */ | |
2992 | static inline int fd_copyout(void __user *param, const void *address, | |
2993 | unsigned long size) | |
2994 | { | |
2995 | return copy_to_user(param, address, size) ? -EFAULT : 0; | |
2996 | } | |
2997 | ||
48c8cee6 JP |
2998 | static inline int fd_copyin(void __user *param, void *address, |
2999 | unsigned long size) | |
1da177e4 LT |
3000 | { |
3001 | return copy_from_user(address, param, size) ? -EFAULT : 0; | |
3002 | } | |
3003 | ||
be7a12bb | 3004 | static const char *drive_name(int type, int drive) |
1da177e4 LT |
3005 | { |
3006 | struct floppy_struct *floppy; | |
3007 | ||
3008 | if (type) | |
3009 | floppy = floppy_type + type; | |
3010 | else { | |
1ce9ae96 WT |
3011 | if (drive_params[drive].native_format) |
3012 | floppy = floppy_type + drive_params[drive].native_format; | |
1da177e4 LT |
3013 | else |
3014 | return "(null)"; | |
3015 | } | |
3016 | if (floppy->name) | |
3017 | return floppy->name; | |
3018 | else | |
3019 | return "(null)"; | |
3020 | } | |
3021 | ||
3022 | /* raw commands */ | |
3023 | static void raw_cmd_done(int flag) | |
3024 | { | |
3025 | int i; | |
3026 | ||
3027 | if (!flag) { | |
3028 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3029 | raw_cmd->flags |= FD_RAW_HARDFAILURE; | |
3030 | } else { | |
3031 | raw_cmd->reply_count = inr; | |
3032 | if (raw_cmd->reply_count > MAX_REPLIES) | |
3033 | raw_cmd->reply_count = 0; | |
3034 | for (i = 0; i < raw_cmd->reply_count; i++) | |
3035 | raw_cmd->reply[i] = reply_buffer[i]; | |
3036 | ||
3037 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3038 | unsigned long flags; | |
3039 | flags = claim_dma_lock(); | |
3040 | raw_cmd->length = fd_get_dma_residue(); | |
3041 | release_dma_lock(flags); | |
3042 | } | |
3043 | ||
3044 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && | |
3045 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) | |
3046 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3047 | ||
3048 | if (disk_change(current_drive)) | |
3049 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; | |
3050 | else | |
3051 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; | |
3052 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) | |
b1bf4210 | 3053 | motor_off_callback(&motor_off_timer[current_drive]); |
1da177e4 LT |
3054 | |
3055 | if (raw_cmd->next && | |
3056 | (!(raw_cmd->flags & FD_RAW_FAILURE) || | |
3057 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && | |
3058 | ((raw_cmd->flags & FD_RAW_FAILURE) || | |
3059 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { | |
3060 | raw_cmd = raw_cmd->next; | |
3061 | return; | |
3062 | } | |
3063 | } | |
3064 | generic_done(flag); | |
3065 | } | |
3066 | ||
3b06c21e | 3067 | static const struct cont_t raw_cmd_cont = { |
1da177e4 LT |
3068 | .interrupt = success_and_wakeup, |
3069 | .redo = floppy_start, | |
3070 | .error = generic_failure, | |
3071 | .done = raw_cmd_done | |
3072 | }; | |
3073 | ||
be7a12bb | 3074 | static int raw_cmd_copyout(int cmd, void __user *param, |
1da177e4 LT |
3075 | struct floppy_raw_cmd *ptr) |
3076 | { | |
3077 | int ret; | |
3078 | ||
3079 | while (ptr) { | |
2145e15e MD |
3080 | struct floppy_raw_cmd cmd = *ptr; |
3081 | cmd.next = NULL; | |
3082 | cmd.kernel_data = NULL; | |
3083 | ret = copy_to_user(param, &cmd, sizeof(cmd)); | |
86b12b48 JP |
3084 | if (ret) |
3085 | return -EFAULT; | |
1da177e4 LT |
3086 | param += sizeof(struct floppy_raw_cmd); |
3087 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { | |
bb57f0c6 JP |
3088 | if (ptr->length >= 0 && |
3089 | ptr->length <= ptr->buffer_length) { | |
3090 | long length = ptr->buffer_length - ptr->length; | |
4575b552 JP |
3091 | ret = fd_copyout(ptr->data, ptr->kernel_data, |
3092 | length); | |
3093 | if (ret) | |
3094 | return ret; | |
bb57f0c6 | 3095 | } |
1da177e4 LT |
3096 | } |
3097 | ptr = ptr->next; | |
3098 | } | |
7f252717 | 3099 | |
1da177e4 LT |
3100 | return 0; |
3101 | } | |
3102 | ||
3103 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) | |
3104 | { | |
06f748c4 JJ |
3105 | struct floppy_raw_cmd *next; |
3106 | struct floppy_raw_cmd *this; | |
1da177e4 LT |
3107 | |
3108 | this = *ptr; | |
3109 | *ptr = NULL; | |
3110 | while (this) { | |
3111 | if (this->buffer_length) { | |
3112 | fd_dma_mem_free((unsigned long)this->kernel_data, | |
3113 | this->buffer_length); | |
3114 | this->buffer_length = 0; | |
3115 | } | |
3116 | next = this->next; | |
3117 | kfree(this); | |
3118 | this = next; | |
3119 | } | |
3120 | } | |
3121 | ||
be7a12bb | 3122 | static int raw_cmd_copyin(int cmd, void __user *param, |
1da177e4 LT |
3123 | struct floppy_raw_cmd **rcmd) |
3124 | { | |
3125 | struct floppy_raw_cmd *ptr; | |
3126 | int ret; | |
3127 | int i; | |
3128 | ||
3129 | *rcmd = NULL; | |
7f252717 JP |
3130 | |
3131 | loop: | |
1661f2e2 | 3132 | ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_KERNEL); |
7f252717 JP |
3133 | if (!ptr) |
3134 | return -ENOMEM; | |
3135 | *rcmd = ptr; | |
3136 | ret = copy_from_user(ptr, param, sizeof(*ptr)); | |
7f252717 JP |
3137 | ptr->next = NULL; |
3138 | ptr->buffer_length = 0; | |
ef87dbe7 MD |
3139 | ptr->kernel_data = NULL; |
3140 | if (ret) | |
3141 | return -EFAULT; | |
7f252717 JP |
3142 | param += sizeof(struct floppy_raw_cmd); |
3143 | if (ptr->cmd_count > 33) | |
1da177e4 LT |
3144 | /* the command may now also take up the space |
3145 | * initially intended for the reply & the | |
3146 | * reply count. Needed for long 82078 commands | |
3147 | * such as RESTORE, which takes ... 17 command | |
3148 | * bytes. Murphy's law #137: When you reserve | |
3149 | * 16 bytes for a structure, you'll one day | |
3150 | * discover that you really need 17... | |
3151 | */ | |
7f252717 JP |
3152 | return -EINVAL; |
3153 | ||
3154 | for (i = 0; i < 16; i++) | |
3155 | ptr->reply[i] = 0; | |
3156 | ptr->resultcode = 0; | |
7f252717 JP |
3157 | |
3158 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3159 | if (ptr->length <= 0) | |
1da177e4 | 3160 | return -EINVAL; |
7f252717 JP |
3161 | ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); |
3162 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); | |
3163 | if (!ptr->kernel_data) | |
3164 | return -ENOMEM; | |
3165 | ptr->buffer_length = ptr->length; | |
3166 | } | |
3167 | if (ptr->flags & FD_RAW_WRITE) { | |
3168 | ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); | |
3169 | if (ret) | |
3170 | return ret; | |
3171 | } | |
1da177e4 | 3172 | |
7f252717 | 3173 | if (ptr->flags & FD_RAW_MORE) { |
1da177e4 | 3174 | rcmd = &(ptr->next); |
1da177e4 | 3175 | ptr->rate &= 0x43; |
7f252717 | 3176 | goto loop; |
1da177e4 | 3177 | } |
7f252717 JP |
3178 | |
3179 | return 0; | |
1da177e4 LT |
3180 | } |
3181 | ||
3182 | static int raw_cmd_ioctl(int cmd, void __user *param) | |
3183 | { | |
1da177e4 | 3184 | struct floppy_raw_cmd *my_raw_cmd; |
06f748c4 JJ |
3185 | int drive; |
3186 | int ret2; | |
3187 | int ret; | |
1da177e4 | 3188 | |
de6048b8 WT |
3189 | if (fdc_state[fdc].rawcmd <= 1) |
3190 | fdc_state[fdc].rawcmd = 1; | |
1da177e4 LT |
3191 | for (drive = 0; drive < N_DRIVE; drive++) { |
3192 | if (FDC(drive) != fdc) | |
3193 | continue; | |
3194 | if (drive == current_drive) { | |
8d9d34e2 | 3195 | if (drive_state[drive].fd_ref > 1) { |
de6048b8 | 3196 | fdc_state[fdc].rawcmd = 2; |
1da177e4 LT |
3197 | break; |
3198 | } | |
8d9d34e2 | 3199 | } else if (drive_state[drive].fd_ref) { |
de6048b8 | 3200 | fdc_state[fdc].rawcmd = 2; |
1da177e4 LT |
3201 | break; |
3202 | } | |
3203 | } | |
3204 | ||
de6048b8 | 3205 | if (fdc_state[fdc].reset) |
1da177e4 LT |
3206 | return -EIO; |
3207 | ||
3208 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); | |
3209 | if (ret) { | |
3210 | raw_cmd_free(&my_raw_cmd); | |
3211 | return ret; | |
3212 | } | |
3213 | ||
3214 | raw_cmd = my_raw_cmd; | |
3215 | cont = &raw_cmd_cont; | |
74f63f46 | 3216 | ret = wait_til_done(floppy_start, true); |
031faabd WT |
3217 | debug_dcl(drive_params[current_drive].flags, |
3218 | "calling disk change from raw_cmd ioctl\n"); | |
1da177e4 | 3219 | |
de6048b8 | 3220 | if (ret != -EINTR && fdc_state[fdc].reset) |
1da177e4 LT |
3221 | ret = -EIO; |
3222 | ||
3223 | DRS->track = NO_TRACK; | |
3224 | ||
3225 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); | |
3226 | if (!ret) | |
3227 | ret = ret2; | |
3228 | raw_cmd_free(&my_raw_cmd); | |
3229 | return ret; | |
3230 | } | |
3231 | ||
3232 | static int invalidate_drive(struct block_device *bdev) | |
3233 | { | |
3234 | /* invalidate the buffer track to force a reread */ | |
3235 | set_bit((long)bdev->bd_disk->private_data, &fake_change); | |
3236 | process_fd_request(); | |
3237 | check_disk_change(bdev); | |
3238 | return 0; | |
3239 | } | |
3240 | ||
be7a12bb | 3241 | static int set_geometry(unsigned int cmd, struct floppy_struct *g, |
1da177e4 LT |
3242 | int drive, int type, struct block_device *bdev) |
3243 | { | |
3244 | int cnt; | |
3245 | ||
3246 | /* sanity checking for parameters. */ | |
da99466a DE |
3247 | if ((int)g->sect <= 0 || |
3248 | (int)g->head <= 0 || | |
3249 | /* check for overflow in max_sector */ | |
3250 | (int)(g->sect * g->head) <= 0 || | |
f3554aeb DE |
3251 | /* check for zero in F_SECT_PER_TRACK */ |
3252 | (unsigned char)((g->sect << 2) >> FD_SIZECODE(g)) == 0 || | |
1ce9ae96 | 3253 | g->track <= 0 || g->track > drive_params[drive].tracks >> STRETCH(g) || |
1da177e4 | 3254 | /* check if reserved bits are set */ |
9e49184c | 3255 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
1da177e4 LT |
3256 | return -EINVAL; |
3257 | if (type) { | |
3258 | if (!capable(CAP_SYS_ADMIN)) | |
3259 | return -EPERM; | |
b1c82b5c | 3260 | mutex_lock(&open_lock); |
a0c80efe | 3261 | if (lock_fdc(drive)) { |
8516a500 JS |
3262 | mutex_unlock(&open_lock); |
3263 | return -EINTR; | |
3264 | } | |
1da177e4 LT |
3265 | floppy_type[type] = *g; |
3266 | floppy_type[type].name = "user format"; | |
3267 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) | |
3268 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = | |
3269 | floppy_type[type].size + 1; | |
3270 | process_fd_request(); | |
3271 | for (cnt = 0; cnt < N_DRIVE; cnt++) { | |
3272 | struct block_device *bdev = opened_bdev[cnt]; | |
3273 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) | |
3274 | continue; | |
93b270f7 | 3275 | __invalidate_device(bdev, true); |
1da177e4 | 3276 | } |
b1c82b5c | 3277 | mutex_unlock(&open_lock); |
1da177e4 LT |
3278 | } else { |
3279 | int oldStretch; | |
52a0d61f | 3280 | |
a0c80efe | 3281 | if (lock_fdc(drive)) |
52a0d61f | 3282 | return -EINTR; |
4575b552 | 3283 | if (cmd != FDDEFPRM) { |
1da177e4 LT |
3284 | /* notice a disk change immediately, else |
3285 | * we lose our settings immediately*/ | |
74f63f46 | 3286 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 JP |
3287 | return -EINTR; |
3288 | } | |
1da177e4 LT |
3289 | oldStretch = g->stretch; |
3290 | user_params[drive] = *g; | |
3291 | if (buffer_drive == drive) | |
3292 | SUPBOUND(buffer_max, user_params[drive].sect); | |
3293 | current_type[drive] = &user_params[drive]; | |
3294 | floppy_sizes[drive] = user_params[drive].size; | |
3295 | if (cmd == FDDEFPRM) | |
3296 | DRS->keep_data = -1; | |
3297 | else | |
3298 | DRS->keep_data = 1; | |
3299 | /* invalidation. Invalidate only when needed, i.e. | |
3300 | * when there are already sectors in the buffer cache | |
3301 | * whose number will change. This is useful, because | |
3302 | * mtools often changes the geometry of the disk after | |
3303 | * looking at the boot block */ | |
3304 | if (DRS->maxblock > user_params[drive].sect || | |
3305 | DRS->maxtrack || | |
3306 | ((user_params[drive].sect ^ oldStretch) & | |
9e49184c | 3307 | (FD_SWAPSIDES | FD_SECTBASEMASK))) |
1da177e4 LT |
3308 | invalidate_drive(bdev); |
3309 | else | |
3310 | process_fd_request(); | |
3311 | } | |
3312 | return 0; | |
3313 | } | |
3314 | ||
3315 | /* handle obsolete ioctl's */ | |
21af5448 | 3316 | static unsigned int ioctl_table[] = { |
1da177e4 LT |
3317 | FDCLRPRM, |
3318 | FDSETPRM, | |
3319 | FDDEFPRM, | |
3320 | FDGETPRM, | |
3321 | FDMSGON, | |
3322 | FDMSGOFF, | |
3323 | FDFMTBEG, | |
3324 | FDFMTTRK, | |
3325 | FDFMTEND, | |
3326 | FDSETEMSGTRESH, | |
3327 | FDFLUSH, | |
3328 | FDSETMAXERRS, | |
3329 | FDGETMAXERRS, | |
3330 | FDGETDRVTYP, | |
3331 | FDSETDRVPRM, | |
3332 | FDGETDRVPRM, | |
3333 | FDGETDRVSTAT, | |
3334 | FDPOLLDRVSTAT, | |
3335 | FDRESET, | |
3336 | FDGETFDCSTAT, | |
3337 | FDWERRORCLR, | |
3338 | FDWERRORGET, | |
3339 | FDRAWCMD, | |
3340 | FDEJECT, | |
3341 | FDTWADDLE | |
3342 | }; | |
3343 | ||
21af5448 | 3344 | static int normalize_ioctl(unsigned int *cmd, int *size) |
1da177e4 LT |
3345 | { |
3346 | int i; | |
3347 | ||
3348 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { | |
3349 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { | |
3350 | *size = _IOC_SIZE(*cmd); | |
3351 | *cmd = ioctl_table[i]; | |
3352 | if (*size > _IOC_SIZE(*cmd)) { | |
b46df356 | 3353 | pr_info("ioctl not yet supported\n"); |
1da177e4 LT |
3354 | return -EFAULT; |
3355 | } | |
3356 | return 0; | |
3357 | } | |
3358 | } | |
3359 | return -EINVAL; | |
3360 | } | |
3361 | ||
3362 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) | |
3363 | { | |
3364 | if (type) | |
3365 | *g = &floppy_type[type]; | |
3366 | else { | |
a0c80efe | 3367 | if (lock_fdc(drive)) |
52a0d61f | 3368 | return -EINTR; |
74f63f46 | 3369 | if (poll_drive(false, 0) == -EINTR) |
4575b552 | 3370 | return -EINTR; |
1da177e4 LT |
3371 | process_fd_request(); |
3372 | *g = current_type[drive]; | |
3373 | } | |
3374 | if (!*g) | |
3375 | return -ENODEV; | |
3376 | return 0; | |
3377 | } | |
3378 | ||
a885c8c4 CH |
3379 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3380 | { | |
3381 | int drive = (long)bdev->bd_disk->private_data; | |
3382 | int type = ITYPE(drive_state[drive].fd_device); | |
3383 | struct floppy_struct *g; | |
3384 | int ret; | |
3385 | ||
3386 | ret = get_floppy_geometry(drive, type, &g); | |
3387 | if (ret) | |
3388 | return ret; | |
3389 | ||
3390 | geo->heads = g->head; | |
3391 | geo->sectors = g->sect; | |
3392 | geo->cylinders = g->track; | |
3393 | return 0; | |
3394 | } | |
3395 | ||
9b04609b DE |
3396 | static bool valid_floppy_drive_params(const short autodetect[8], |
3397 | int native_format) | |
5635f897 DE |
3398 | { |
3399 | size_t floppy_type_size = ARRAY_SIZE(floppy_type); | |
3400 | size_t i = 0; | |
3401 | ||
3402 | for (i = 0; i < 8; ++i) { | |
3403 | if (autodetect[i] < 0 || | |
3404 | autodetect[i] >= floppy_type_size) | |
3405 | return false; | |
3406 | } | |
3407 | ||
9b04609b DE |
3408 | if (native_format < 0 || native_format >= floppy_type_size) |
3409 | return false; | |
3410 | ||
5635f897 DE |
3411 | return true; |
3412 | } | |
3413 | ||
8a6cfeb6 | 3414 | static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1da177e4 LT |
3415 | unsigned long param) |
3416 | { | |
a4af9b48 | 3417 | int drive = (long)bdev->bd_disk->private_data; |
8d9d34e2 | 3418 | int type = ITYPE(drive_state[drive].fd_device); |
06f748c4 | 3419 | int i; |
1da177e4 LT |
3420 | int ret; |
3421 | int size; | |
3422 | union inparam { | |
3423 | struct floppy_struct g; /* geometry */ | |
3424 | struct format_descr f; | |
3425 | struct floppy_max_errors max_errors; | |
3426 | struct floppy_drive_params dp; | |
3427 | } inparam; /* parameters coming from user space */ | |
724ee626 | 3428 | const void *outparam; /* parameters passed back to user space */ |
1da177e4 LT |
3429 | |
3430 | /* convert compatibility eject ioctls into floppy eject ioctl. | |
3431 | * We do this in order to provide a means to eject floppy disks before | |
3432 | * installing the new fdutils package */ | |
3433 | if (cmd == CDROMEJECT || /* CD-ROM eject */ | |
a81ee544 | 3434 | cmd == 0x6470) { /* SunOS floppy eject */ |
1da177e4 LT |
3435 | DPRINT("obsolete eject ioctl\n"); |
3436 | DPRINT("please use floppycontrol --eject\n"); | |
3437 | cmd = FDEJECT; | |
3438 | } | |
3439 | ||
a81ee544 | 3440 | if (!((cmd & 0xff00) == 0x0200)) |
1da177e4 LT |
3441 | return -EINVAL; |
3442 | ||
a81ee544 | 3443 | /* convert the old style command into a new style command */ |
4575b552 JP |
3444 | ret = normalize_ioctl(&cmd, &size); |
3445 | if (ret) | |
3446 | return ret; | |
a81ee544 | 3447 | |
1da177e4 | 3448 | /* permission checks */ |
0aad92cf | 3449 | if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || |
1da177e4 LT |
3450 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) |
3451 | return -EPERM; | |
3452 | ||
2886a8bd AV |
3453 | if (WARN_ON(size < 0 || size > sizeof(inparam))) |
3454 | return -EINVAL; | |
3455 | ||
1da177e4 | 3456 | /* copyin */ |
b87c9e0a | 3457 | memset(&inparam, 0, sizeof(inparam)); |
4575b552 JP |
3458 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
3459 | ret = fd_copyin((void __user *)param, &inparam, size); | |
3460 | if (ret) | |
3461 | return ret; | |
3462 | } | |
1da177e4 | 3463 | |
da273653 JP |
3464 | switch (cmd) { |
3465 | case FDEJECT: | |
8d9d34e2 | 3466 | if (drive_state[drive].fd_ref != 1) |
da273653 JP |
3467 | /* somebody else has this drive open */ |
3468 | return -EBUSY; | |
a0c80efe | 3469 | if (lock_fdc(drive)) |
52a0d61f | 3470 | return -EINTR; |
1da177e4 | 3471 | |
da273653 JP |
3472 | /* do the actual eject. Fails on |
3473 | * non-Sparc architectures */ | |
3474 | ret = fd_eject(UNIT(drive)); | |
1da177e4 | 3475 | |
8d9d34e2 WT |
3476 | set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
3477 | set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); | |
da273653 JP |
3478 | process_fd_request(); |
3479 | return ret; | |
3480 | case FDCLRPRM: | |
a0c80efe | 3481 | if (lock_fdc(drive)) |
52a0d61f | 3482 | return -EINTR; |
da273653 JP |
3483 | current_type[drive] = NULL; |
3484 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; | |
8d9d34e2 | 3485 | drive_state[drive].keep_data = 0; |
da273653 JP |
3486 | return invalidate_drive(bdev); |
3487 | case FDSETPRM: | |
3488 | case FDDEFPRM: | |
3489 | return set_geometry(cmd, &inparam.g, drive, type, bdev); | |
3490 | case FDGETPRM: | |
4575b552 | 3491 | ret = get_floppy_geometry(drive, type, |
724ee626 | 3492 | (struct floppy_struct **)&outparam); |
4575b552 JP |
3493 | if (ret) |
3494 | return ret; | |
65eea8ed AW |
3495 | memcpy(&inparam.g, outparam, |
3496 | offsetof(struct floppy_struct, name)); | |
3497 | outparam = &inparam.g; | |
da273653 JP |
3498 | break; |
3499 | case FDMSGON: | |
1ce9ae96 | 3500 | drive_params[drive].flags |= FTD_MSG; |
da273653 JP |
3501 | return 0; |
3502 | case FDMSGOFF: | |
1ce9ae96 | 3503 | drive_params[drive].flags &= ~FTD_MSG; |
da273653 JP |
3504 | return 0; |
3505 | case FDFMTBEG: | |
a0c80efe | 3506 | if (lock_fdc(drive)) |
52a0d61f | 3507 | return -EINTR; |
74f63f46 | 3508 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3509 | return -EINTR; |
8d9d34e2 | 3510 | ret = drive_state[drive].flags; |
da273653 JP |
3511 | process_fd_request(); |
3512 | if (ret & FD_VERIFY) | |
3513 | return -ENODEV; | |
3514 | if (!(ret & FD_DISK_WRITABLE)) | |
3515 | return -EROFS; | |
3516 | return 0; | |
3517 | case FDFMTTRK: | |
8d9d34e2 | 3518 | if (drive_state[drive].fd_ref != 1) |
da273653 JP |
3519 | return -EBUSY; |
3520 | return do_format(drive, &inparam.f); | |
3521 | case FDFMTEND: | |
3522 | case FDFLUSH: | |
a0c80efe | 3523 | if (lock_fdc(drive)) |
52a0d61f | 3524 | return -EINTR; |
da273653 JP |
3525 | return invalidate_drive(bdev); |
3526 | case FDSETEMSGTRESH: | |
1ce9ae96 | 3527 | drive_params[drive].max_errors.reporting = (unsigned short)(param & 0x0f); |
da273653 JP |
3528 | return 0; |
3529 | case FDGETMAXERRS: | |
1ce9ae96 | 3530 | outparam = &drive_params[drive].max_errors; |
da273653 JP |
3531 | break; |
3532 | case FDSETMAXERRS: | |
1ce9ae96 | 3533 | drive_params[drive].max_errors = inparam.max_errors; |
da273653 JP |
3534 | break; |
3535 | case FDGETDRVTYP: | |
3536 | outparam = drive_name(type, drive); | |
724ee626 | 3537 | SUPBOUND(size, strlen((const char *)outparam) + 1); |
da273653 JP |
3538 | break; |
3539 | case FDSETDRVPRM: | |
9b04609b DE |
3540 | if (!valid_floppy_drive_params(inparam.dp.autodetect, |
3541 | inparam.dp.native_format)) | |
5635f897 | 3542 | return -EINVAL; |
1ce9ae96 | 3543 | drive_params[drive] = inparam.dp; |
da273653 JP |
3544 | break; |
3545 | case FDGETDRVPRM: | |
1ce9ae96 | 3546 | outparam = &drive_params[drive]; |
da273653 JP |
3547 | break; |
3548 | case FDPOLLDRVSTAT: | |
a0c80efe | 3549 | if (lock_fdc(drive)) |
52a0d61f | 3550 | return -EINTR; |
74f63f46 | 3551 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3552 | return -EINTR; |
da273653 JP |
3553 | process_fd_request(); |
3554 | /* fall through */ | |
3555 | case FDGETDRVSTAT: | |
8d9d34e2 | 3556 | outparam = &drive_state[drive]; |
da273653 JP |
3557 | break; |
3558 | case FDRESET: | |
74f63f46 | 3559 | return user_reset_fdc(drive, (int)param, true); |
da273653 | 3560 | case FDGETFDCSTAT: |
f9d322bd | 3561 | outparam = &fdc_state[FDC(drive)]; |
da273653 JP |
3562 | break; |
3563 | case FDWERRORCLR: | |
121e2979 | 3564 | memset(&write_errors[drive], 0, sizeof(write_errors[drive])); |
da273653 JP |
3565 | return 0; |
3566 | case FDWERRORGET: | |
121e2979 | 3567 | outparam = &write_errors[drive]; |
da273653 JP |
3568 | break; |
3569 | case FDRAWCMD: | |
3570 | if (type) | |
1da177e4 | 3571 | return -EINVAL; |
a0c80efe | 3572 | if (lock_fdc(drive)) |
52a0d61f | 3573 | return -EINTR; |
da273653 | 3574 | set_floppy(drive); |
4575b552 JP |
3575 | i = raw_cmd_ioctl(cmd, (void __user *)param); |
3576 | if (i == -EINTR) | |
3577 | return -EINTR; | |
da273653 JP |
3578 | process_fd_request(); |
3579 | return i; | |
3580 | case FDTWADDLE: | |
a0c80efe | 3581 | if (lock_fdc(drive)) |
52a0d61f | 3582 | return -EINTR; |
da273653 JP |
3583 | twaddle(); |
3584 | process_fd_request(); | |
3585 | return 0; | |
3586 | default: | |
3587 | return -EINVAL; | |
3588 | } | |
1da177e4 LT |
3589 | |
3590 | if (_IOC_DIR(cmd) & _IOC_READ) | |
3591 | return fd_copyout((void __user *)param, outparam, size); | |
da273653 JP |
3592 | |
3593 | return 0; | |
1da177e4 LT |
3594 | } |
3595 | ||
8a6cfeb6 AB |
3596 | static int fd_ioctl(struct block_device *bdev, fmode_t mode, |
3597 | unsigned int cmd, unsigned long param) | |
3598 | { | |
3599 | int ret; | |
3600 | ||
2a48fc0a | 3601 | mutex_lock(&floppy_mutex); |
8a6cfeb6 | 3602 | ret = fd_locked_ioctl(bdev, mode, cmd, param); |
2a48fc0a | 3603 | mutex_unlock(&floppy_mutex); |
8a6cfeb6 AB |
3604 | |
3605 | return ret; | |
3606 | } | |
3607 | ||
229b53c9 AV |
3608 | #ifdef CONFIG_COMPAT |
3609 | ||
3610 | struct compat_floppy_drive_params { | |
3611 | char cmos; | |
3612 | compat_ulong_t max_dtr; | |
3613 | compat_ulong_t hlt; | |
3614 | compat_ulong_t hut; | |
3615 | compat_ulong_t srt; | |
3616 | compat_ulong_t spinup; | |
3617 | compat_ulong_t spindown; | |
3618 | unsigned char spindown_offset; | |
3619 | unsigned char select_delay; | |
3620 | unsigned char rps; | |
3621 | unsigned char tracks; | |
3622 | compat_ulong_t timeout; | |
3623 | unsigned char interleave_sect; | |
3624 | struct floppy_max_errors max_errors; | |
3625 | char flags; | |
3626 | char read_track; | |
3627 | short autodetect[8]; | |
3628 | compat_int_t checkfreq; | |
3629 | compat_int_t native_format; | |
3630 | }; | |
3631 | ||
3632 | struct compat_floppy_drive_struct { | |
3633 | signed char flags; | |
3634 | compat_ulong_t spinup_date; | |
3635 | compat_ulong_t select_date; | |
3636 | compat_ulong_t first_read_date; | |
3637 | short probed_format; | |
3638 | short track; | |
3639 | short maxblock; | |
3640 | short maxtrack; | |
3641 | compat_int_t generation; | |
3642 | compat_int_t keep_data; | |
3643 | compat_int_t fd_ref; | |
3644 | compat_int_t fd_device; | |
3645 | compat_int_t last_checked; | |
3646 | compat_caddr_t dmabuf; | |
3647 | compat_int_t bufblocks; | |
3648 | }; | |
3649 | ||
3650 | struct compat_floppy_fdc_state { | |
3651 | compat_int_t spec1; | |
3652 | compat_int_t spec2; | |
3653 | compat_int_t dtr; | |
3654 | unsigned char version; | |
3655 | unsigned char dor; | |
3656 | compat_ulong_t address; | |
3657 | unsigned int rawcmd:2; | |
3658 | unsigned int reset:1; | |
3659 | unsigned int need_configure:1; | |
3660 | unsigned int perp_mode:2; | |
3661 | unsigned int has_fifo:1; | |
3662 | unsigned int driver_version; | |
3663 | unsigned char track[4]; | |
3664 | }; | |
3665 | ||
3666 | struct compat_floppy_write_errors { | |
3667 | unsigned int write_errors; | |
3668 | compat_ulong_t first_error_sector; | |
3669 | compat_int_t first_error_generation; | |
3670 | compat_ulong_t last_error_sector; | |
3671 | compat_int_t last_error_generation; | |
3672 | compat_uint_t badness; | |
3673 | }; | |
3674 | ||
3675 | #define FDSETPRM32 _IOW(2, 0x42, struct compat_floppy_struct) | |
3676 | #define FDDEFPRM32 _IOW(2, 0x43, struct compat_floppy_struct) | |
3677 | #define FDSETDRVPRM32 _IOW(2, 0x90, struct compat_floppy_drive_params) | |
3678 | #define FDGETDRVPRM32 _IOR(2, 0x11, struct compat_floppy_drive_params) | |
3679 | #define FDGETDRVSTAT32 _IOR(2, 0x12, struct compat_floppy_drive_struct) | |
3680 | #define FDPOLLDRVSTAT32 _IOR(2, 0x13, struct compat_floppy_drive_struct) | |
3681 | #define FDGETFDCSTAT32 _IOR(2, 0x15, struct compat_floppy_fdc_state) | |
3682 | #define FDWERRORGET32 _IOR(2, 0x17, struct compat_floppy_write_errors) | |
3683 | ||
3684 | static int compat_set_geometry(struct block_device *bdev, fmode_t mode, unsigned int cmd, | |
3685 | struct compat_floppy_struct __user *arg) | |
3686 | { | |
3687 | struct floppy_struct v; | |
3688 | int drive, type; | |
3689 | int err; | |
3690 | ||
3691 | BUILD_BUG_ON(offsetof(struct floppy_struct, name) != | |
3692 | offsetof(struct compat_floppy_struct, name)); | |
3693 | ||
3694 | if (!(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) | |
3695 | return -EPERM; | |
3696 | ||
3697 | memset(&v, 0, sizeof(struct floppy_struct)); | |
3698 | if (copy_from_user(&v, arg, offsetof(struct floppy_struct, name))) | |
3699 | return -EFAULT; | |
3700 | ||
3701 | mutex_lock(&floppy_mutex); | |
3702 | drive = (long)bdev->bd_disk->private_data; | |
8d9d34e2 | 3703 | type = ITYPE(drive_state[drive].fd_device); |
229b53c9 AV |
3704 | err = set_geometry(cmd == FDSETPRM32 ? FDSETPRM : FDDEFPRM, |
3705 | &v, drive, type, bdev); | |
3706 | mutex_unlock(&floppy_mutex); | |
3707 | return err; | |
3708 | } | |
3709 | ||
3710 | static int compat_get_prm(int drive, | |
3711 | struct compat_floppy_struct __user *arg) | |
3712 | { | |
3713 | struct compat_floppy_struct v; | |
3714 | struct floppy_struct *p; | |
3715 | int err; | |
3716 | ||
3717 | memset(&v, 0, sizeof(v)); | |
3718 | mutex_lock(&floppy_mutex); | |
8d9d34e2 WT |
3719 | err = get_floppy_geometry(drive, ITYPE(drive_state[drive].fd_device), |
3720 | &p); | |
229b53c9 AV |
3721 | if (err) { |
3722 | mutex_unlock(&floppy_mutex); | |
3723 | return err; | |
3724 | } | |
3725 | memcpy(&v, p, offsetof(struct floppy_struct, name)); | |
3726 | mutex_unlock(&floppy_mutex); | |
3727 | if (copy_to_user(arg, &v, sizeof(struct compat_floppy_struct))) | |
3728 | return -EFAULT; | |
3729 | return 0; | |
3730 | } | |
3731 | ||
3732 | static int compat_setdrvprm(int drive, | |
3733 | struct compat_floppy_drive_params __user *arg) | |
3734 | { | |
3735 | struct compat_floppy_drive_params v; | |
3736 | ||
3737 | if (!capable(CAP_SYS_ADMIN)) | |
3738 | return -EPERM; | |
3739 | if (copy_from_user(&v, arg, sizeof(struct compat_floppy_drive_params))) | |
3740 | return -EFAULT; | |
9b04609b | 3741 | if (!valid_floppy_drive_params(v.autodetect, v.native_format)) |
5635f897 | 3742 | return -EINVAL; |
229b53c9 | 3743 | mutex_lock(&floppy_mutex); |
1ce9ae96 WT |
3744 | drive_params[drive].cmos = v.cmos; |
3745 | drive_params[drive].max_dtr = v.max_dtr; | |
3746 | drive_params[drive].hlt = v.hlt; | |
3747 | drive_params[drive].hut = v.hut; | |
3748 | drive_params[drive].srt = v.srt; | |
3749 | drive_params[drive].spinup = v.spinup; | |
3750 | drive_params[drive].spindown = v.spindown; | |
3751 | drive_params[drive].spindown_offset = v.spindown_offset; | |
3752 | drive_params[drive].select_delay = v.select_delay; | |
3753 | drive_params[drive].rps = v.rps; | |
3754 | drive_params[drive].tracks = v.tracks; | |
3755 | drive_params[drive].timeout = v.timeout; | |
3756 | drive_params[drive].interleave_sect = v.interleave_sect; | |
3757 | drive_params[drive].max_errors = v.max_errors; | |
3758 | drive_params[drive].flags = v.flags; | |
3759 | drive_params[drive].read_track = v.read_track; | |
3760 | memcpy(drive_params[drive].autodetect, v.autodetect, | |
3761 | sizeof(v.autodetect)); | |
3762 | drive_params[drive].checkfreq = v.checkfreq; | |
3763 | drive_params[drive].native_format = v.native_format; | |
229b53c9 AV |
3764 | mutex_unlock(&floppy_mutex); |
3765 | return 0; | |
3766 | } | |
3767 | ||
3768 | static int compat_getdrvprm(int drive, | |
3769 | struct compat_floppy_drive_params __user *arg) | |
3770 | { | |
3771 | struct compat_floppy_drive_params v; | |
3772 | ||
3773 | memset(&v, 0, sizeof(struct compat_floppy_drive_params)); | |
3774 | mutex_lock(&floppy_mutex); | |
1ce9ae96 WT |
3775 | v.cmos = drive_params[drive].cmos; |
3776 | v.max_dtr = drive_params[drive].max_dtr; | |
3777 | v.hlt = drive_params[drive].hlt; | |
3778 | v.hut = drive_params[drive].hut; | |
3779 | v.srt = drive_params[drive].srt; | |
3780 | v.spinup = drive_params[drive].spinup; | |
3781 | v.spindown = drive_params[drive].spindown; | |
3782 | v.spindown_offset = drive_params[drive].spindown_offset; | |
3783 | v.select_delay = drive_params[drive].select_delay; | |
3784 | v.rps = drive_params[drive].rps; | |
3785 | v.tracks = drive_params[drive].tracks; | |
3786 | v.timeout = drive_params[drive].timeout; | |
3787 | v.interleave_sect = drive_params[drive].interleave_sect; | |
3788 | v.max_errors = drive_params[drive].max_errors; | |
3789 | v.flags = drive_params[drive].flags; | |
3790 | v.read_track = drive_params[drive].read_track; | |
3791 | memcpy(v.autodetect, drive_params[drive].autodetect, | |
3792 | sizeof(v.autodetect)); | |
3793 | v.checkfreq = drive_params[drive].checkfreq; | |
3794 | v.native_format = drive_params[drive].native_format; | |
229b53c9 AV |
3795 | mutex_unlock(&floppy_mutex); |
3796 | ||
52f6f9d7 | 3797 | if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_params))) |
229b53c9 AV |
3798 | return -EFAULT; |
3799 | return 0; | |
3800 | } | |
3801 | ||
3802 | static int compat_getdrvstat(int drive, bool poll, | |
3803 | struct compat_floppy_drive_struct __user *arg) | |
3804 | { | |
3805 | struct compat_floppy_drive_struct v; | |
3806 | ||
3807 | memset(&v, 0, sizeof(struct compat_floppy_drive_struct)); | |
3808 | mutex_lock(&floppy_mutex); | |
3809 | ||
3810 | if (poll) { | |
3811 | if (lock_fdc(drive)) | |
3812 | goto Eintr; | |
3813 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) | |
3814 | goto Eintr; | |
3815 | process_fd_request(); | |
3816 | } | |
8d9d34e2 WT |
3817 | v.spinup_date = drive_state[drive].spinup_date; |
3818 | v.select_date = drive_state[drive].select_date; | |
3819 | v.first_read_date = drive_state[drive].first_read_date; | |
3820 | v.probed_format = drive_state[drive].probed_format; | |
3821 | v.track = drive_state[drive].track; | |
3822 | v.maxblock = drive_state[drive].maxblock; | |
3823 | v.maxtrack = drive_state[drive].maxtrack; | |
3824 | v.generation = drive_state[drive].generation; | |
3825 | v.keep_data = drive_state[drive].keep_data; | |
3826 | v.fd_ref = drive_state[drive].fd_ref; | |
3827 | v.fd_device = drive_state[drive].fd_device; | |
3828 | v.last_checked = drive_state[drive].last_checked; | |
3829 | v.dmabuf = (uintptr_t) drive_state[drive].dmabuf; | |
3830 | v.bufblocks = drive_state[drive].bufblocks; | |
229b53c9 AV |
3831 | mutex_unlock(&floppy_mutex); |
3832 | ||
52f6f9d7 | 3833 | if (copy_to_user(arg, &v, sizeof(struct compat_floppy_drive_struct))) |
229b53c9 AV |
3834 | return -EFAULT; |
3835 | return 0; | |
3836 | Eintr: | |
3837 | mutex_unlock(&floppy_mutex); | |
3838 | return -EINTR; | |
3839 | } | |
3840 | ||
3841 | static int compat_getfdcstat(int drive, | |
3842 | struct compat_floppy_fdc_state __user *arg) | |
3843 | { | |
3844 | struct compat_floppy_fdc_state v32; | |
3845 | struct floppy_fdc_state v; | |
3846 | ||
3847 | mutex_lock(&floppy_mutex); | |
f9d322bd | 3848 | v = fdc_state[FDC(drive)]; |
229b53c9 AV |
3849 | mutex_unlock(&floppy_mutex); |
3850 | ||
3851 | memset(&v32, 0, sizeof(struct compat_floppy_fdc_state)); | |
3852 | v32.spec1 = v.spec1; | |
3853 | v32.spec2 = v.spec2; | |
3854 | v32.dtr = v.dtr; | |
3855 | v32.version = v.version; | |
3856 | v32.dor = v.dor; | |
3857 | v32.address = v.address; | |
3858 | v32.rawcmd = v.rawcmd; | |
3859 | v32.reset = v.reset; | |
3860 | v32.need_configure = v.need_configure; | |
3861 | v32.perp_mode = v.perp_mode; | |
3862 | v32.has_fifo = v.has_fifo; | |
3863 | v32.driver_version = v.driver_version; | |
3864 | memcpy(v32.track, v.track, 4); | |
3865 | if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_fdc_state))) | |
3866 | return -EFAULT; | |
3867 | return 0; | |
3868 | } | |
3869 | ||
3870 | static int compat_werrorget(int drive, | |
3871 | struct compat_floppy_write_errors __user *arg) | |
3872 | { | |
3873 | struct compat_floppy_write_errors v32; | |
3874 | struct floppy_write_errors v; | |
3875 | ||
3876 | memset(&v32, 0, sizeof(struct compat_floppy_write_errors)); | |
3877 | mutex_lock(&floppy_mutex); | |
121e2979 | 3878 | v = write_errors[drive]; |
229b53c9 AV |
3879 | mutex_unlock(&floppy_mutex); |
3880 | v32.write_errors = v.write_errors; | |
3881 | v32.first_error_sector = v.first_error_sector; | |
3882 | v32.first_error_generation = v.first_error_generation; | |
3883 | v32.last_error_sector = v.last_error_sector; | |
3884 | v32.last_error_generation = v.last_error_generation; | |
3885 | v32.badness = v.badness; | |
3886 | if (copy_to_user(arg, &v32, sizeof(struct compat_floppy_write_errors))) | |
3887 | return -EFAULT; | |
3888 | return 0; | |
3889 | } | |
3890 | ||
3891 | static int fd_compat_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, | |
3892 | unsigned long param) | |
3893 | { | |
3894 | int drive = (long)bdev->bd_disk->private_data; | |
3895 | switch (cmd) { | |
9452b1a3 AB |
3896 | case CDROMEJECT: /* CD-ROM eject */ |
3897 | case 0x6470: /* SunOS floppy eject */ | |
3898 | ||
229b53c9 AV |
3899 | case FDMSGON: |
3900 | case FDMSGOFF: | |
3901 | case FDSETEMSGTRESH: | |
3902 | case FDFLUSH: | |
3903 | case FDWERRORCLR: | |
3904 | case FDEJECT: | |
3905 | case FDCLRPRM: | |
3906 | case FDFMTBEG: | |
3907 | case FDRESET: | |
3908 | case FDTWADDLE: | |
3909 | return fd_ioctl(bdev, mode, cmd, param); | |
3910 | case FDSETMAXERRS: | |
3911 | case FDGETMAXERRS: | |
3912 | case FDGETDRVTYP: | |
3913 | case FDFMTEND: | |
3914 | case FDFMTTRK: | |
3915 | case FDRAWCMD: | |
3916 | return fd_ioctl(bdev, mode, cmd, | |
3917 | (unsigned long)compat_ptr(param)); | |
3918 | case FDSETPRM32: | |
3919 | case FDDEFPRM32: | |
3920 | return compat_set_geometry(bdev, mode, cmd, compat_ptr(param)); | |
3921 | case FDGETPRM32: | |
3922 | return compat_get_prm(drive, compat_ptr(param)); | |
3923 | case FDSETDRVPRM32: | |
3924 | return compat_setdrvprm(drive, compat_ptr(param)); | |
3925 | case FDGETDRVPRM32: | |
3926 | return compat_getdrvprm(drive, compat_ptr(param)); | |
3927 | case FDPOLLDRVSTAT32: | |
3928 | return compat_getdrvstat(drive, true, compat_ptr(param)); | |
3929 | case FDGETDRVSTAT32: | |
3930 | return compat_getdrvstat(drive, false, compat_ptr(param)); | |
3931 | case FDGETFDCSTAT32: | |
3932 | return compat_getfdcstat(drive, compat_ptr(param)); | |
3933 | case FDWERRORGET32: | |
3934 | return compat_werrorget(drive, compat_ptr(param)); | |
3935 | } | |
3936 | return -EINVAL; | |
3937 | } | |
3938 | #endif | |
3939 | ||
1da177e4 LT |
3940 | static void __init config_types(void) |
3941 | { | |
b46df356 | 3942 | bool has_drive = false; |
1da177e4 LT |
3943 | int drive; |
3944 | ||
3945 | /* read drive info out of physical CMOS */ | |
3946 | drive = 0; | |
1ce9ae96 WT |
3947 | if (!drive_params[drive].cmos) |
3948 | drive_params[drive].cmos = FLOPPY0_TYPE; | |
1da177e4 | 3949 | drive = 1; |
1ce9ae96 WT |
3950 | if (!drive_params[drive].cmos) |
3951 | drive_params[drive].cmos = FLOPPY1_TYPE; | |
1da177e4 | 3952 | |
06f748c4 | 3953 | /* FIXME: additional physical CMOS drive detection should go here */ |
1da177e4 LT |
3954 | |
3955 | for (drive = 0; drive < N_DRIVE; drive++) { | |
1ce9ae96 | 3956 | unsigned int type = drive_params[drive].cmos; |
1da177e4 LT |
3957 | struct floppy_drive_params *params; |
3958 | const char *name = NULL; | |
bcf4299e | 3959 | char temparea[32]; |
1da177e4 | 3960 | |
945f390f | 3961 | if (type < ARRAY_SIZE(default_drive_params)) { |
1da177e4 LT |
3962 | params = &default_drive_params[type].params; |
3963 | if (type) { | |
3964 | name = default_drive_params[type].name; | |
3965 | allowed_drive_mask |= 1 << drive; | |
3966 | } else | |
3967 | allowed_drive_mask &= ~(1 << drive); | |
3968 | } else { | |
3969 | params = &default_drive_params[0].params; | |
bcf4299e RV |
3970 | snprintf(temparea, sizeof(temparea), |
3971 | "unknown type %d (usb?)", type); | |
1da177e4 LT |
3972 | name = temparea; |
3973 | } | |
3974 | if (name) { | |
b46df356 JP |
3975 | const char *prepend; |
3976 | if (!has_drive) { | |
3977 | prepend = ""; | |
3978 | has_drive = true; | |
3979 | pr_info("Floppy drive(s):"); | |
3980 | } else { | |
3981 | prepend = ","; | |
1da177e4 | 3982 | } |
b46df356 JP |
3983 | |
3984 | pr_cont("%s fd%d is %s", prepend, drive, name); | |
1da177e4 | 3985 | } |
1ce9ae96 | 3986 | drive_params[drive] = *params; |
1da177e4 | 3987 | } |
b46df356 JP |
3988 | |
3989 | if (has_drive) | |
3990 | pr_cont("\n"); | |
1da177e4 LT |
3991 | } |
3992 | ||
db2a144b | 3993 | static void floppy_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 3994 | { |
a4af9b48 | 3995 | int drive = (long)disk->private_data; |
1da177e4 | 3996 | |
2a48fc0a | 3997 | mutex_lock(&floppy_mutex); |
b1c82b5c | 3998 | mutex_lock(&open_lock); |
8d9d34e2 | 3999 | if (!drive_state[drive].fd_ref--) { |
1da177e4 | 4000 | DPRINT("floppy_release with fd_ref == 0"); |
8d9d34e2 | 4001 | drive_state[drive].fd_ref = 0; |
1da177e4 | 4002 | } |
8d9d34e2 | 4003 | if (!drive_state[drive].fd_ref) |
1da177e4 | 4004 | opened_bdev[drive] = NULL; |
b1c82b5c | 4005 | mutex_unlock(&open_lock); |
2a48fc0a | 4006 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
4007 | } |
4008 | ||
4009 | /* | |
4010 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
4011 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
4012 | * drive with different device numbers. | |
4013 | */ | |
a4af9b48 | 4014 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 4015 | { |
a4af9b48 AV |
4016 | int drive = (long)bdev->bd_disk->private_data; |
4017 | int old_dev, new_dev; | |
1da177e4 LT |
4018 | int try; |
4019 | int res = -EBUSY; | |
4020 | char *tmp; | |
4021 | ||
2a48fc0a | 4022 | mutex_lock(&floppy_mutex); |
b1c82b5c | 4023 | mutex_lock(&open_lock); |
8d9d34e2 | 4024 | old_dev = drive_state[drive].fd_device; |
a4af9b48 | 4025 | if (opened_bdev[drive] && opened_bdev[drive] != bdev) |
1da177e4 LT |
4026 | goto out2; |
4027 | ||
8d9d34e2 WT |
4028 | if (!drive_state[drive].fd_ref && (drive_params[drive].flags & FD_BROKEN_DCL)) { |
4029 | set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); | |
4030 | set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); | |
1da177e4 LT |
4031 | } |
4032 | ||
8d9d34e2 | 4033 | drive_state[drive].fd_ref++; |
1da177e4 | 4034 | |
a4af9b48 | 4035 | opened_bdev[drive] = bdev; |
1da177e4 LT |
4036 | |
4037 | res = -ENXIO; | |
4038 | ||
4039 | if (!floppy_track_buffer) { | |
4040 | /* if opening an ED drive, reserve a big buffer, | |
4041 | * else reserve a small one */ | |
1ce9ae96 | 4042 | if ((drive_params[drive].cmos == 6) || (drive_params[drive].cmos == 5)) |
1da177e4 LT |
4043 | try = 64; /* Only 48 actually useful */ |
4044 | else | |
4045 | try = 32; /* Only 24 actually useful */ | |
4046 | ||
4047 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
4048 | if (!tmp && !floppy_track_buffer) { | |
4049 | try >>= 1; /* buffer only one side */ | |
4050 | INFBOUND(try, 16); | |
4051 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
4052 | } | |
a81ee544 | 4053 | if (!tmp && !floppy_track_buffer) |
1da177e4 | 4054 | fallback_on_nodma_alloc(&tmp, 2048 * try); |
1da177e4 LT |
4055 | if (!tmp && !floppy_track_buffer) { |
4056 | DPRINT("Unable to allocate DMA memory\n"); | |
4057 | goto out; | |
4058 | } | |
4059 | if (floppy_track_buffer) { | |
4060 | if (tmp) | |
4061 | fd_dma_mem_free((unsigned long)tmp, try * 1024); | |
4062 | } else { | |
4063 | buffer_min = buffer_max = -1; | |
4064 | floppy_track_buffer = tmp; | |
4065 | max_buffer_sectors = try; | |
4066 | } | |
4067 | } | |
4068 | ||
a4af9b48 | 4069 | new_dev = MINOR(bdev->bd_dev); |
8d9d34e2 | 4070 | drive_state[drive].fd_device = new_dev; |
a4af9b48 AV |
4071 | set_capacity(disks[drive], floppy_sizes[new_dev]); |
4072 | if (old_dev != -1 && old_dev != new_dev) { | |
1da177e4 LT |
4073 | if (buffer_drive == drive) |
4074 | buffer_track = -1; | |
4075 | } | |
4076 | ||
f9d322bd WT |
4077 | if (fdc_state[FDC(drive)].rawcmd == 1) |
4078 | fdc_state[FDC(drive)].rawcmd = 2; | |
1da177e4 | 4079 | |
f2791e7e JA |
4080 | if (!(mode & FMODE_NDELAY)) { |
4081 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
8d9d34e2 WT |
4082 | drive_state[drive].last_checked = 0; |
4083 | clear_bit(FD_OPEN_SHOULD_FAIL_BIT, | |
4084 | &drive_state[drive].flags); | |
f2791e7e | 4085 | check_disk_change(bdev); |
8d9d34e2 | 4086 | if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags)) |
f2791e7e | 4087 | goto out; |
8d9d34e2 | 4088 | if (test_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags)) |
f2791e7e JA |
4089 | goto out; |
4090 | } | |
4091 | res = -EROFS; | |
4092 | if ((mode & FMODE_WRITE) && | |
8d9d34e2 | 4093 | !test_bit(FD_DISK_WRITABLE_BIT, &drive_state[drive].flags)) |
f2791e7e JA |
4094 | goto out; |
4095 | } | |
b1c82b5c | 4096 | mutex_unlock(&open_lock); |
2a48fc0a | 4097 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
4098 | return 0; |
4099 | out: | |
8d9d34e2 | 4100 | drive_state[drive].fd_ref--; |
bfa10b8c | 4101 | |
8d9d34e2 | 4102 | if (!drive_state[drive].fd_ref) |
1da177e4 | 4103 | opened_bdev[drive] = NULL; |
1da177e4 | 4104 | out2: |
b1c82b5c | 4105 | mutex_unlock(&open_lock); |
2a48fc0a | 4106 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
4107 | return res; |
4108 | } | |
4109 | ||
4110 | /* | |
4111 | * Check if the disk has been changed or if a change has been faked. | |
4112 | */ | |
1a8a74f0 TH |
4113 | static unsigned int floppy_check_events(struct gendisk *disk, |
4114 | unsigned int clearing) | |
1da177e4 LT |
4115 | { |
4116 | int drive = (long)disk->private_data; | |
4117 | ||
8d9d34e2 WT |
4118 | if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
4119 | test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)) | |
1a8a74f0 | 4120 | return DISK_EVENT_MEDIA_CHANGE; |
1da177e4 | 4121 | |
8d9d34e2 | 4122 | if (time_after(jiffies, drive_state[drive].last_checked + drive_params[drive].checkfreq)) { |
a0c80efe | 4123 | if (lock_fdc(drive)) |
96d7cb93 | 4124 | return 0; |
74f63f46 | 4125 | poll_drive(false, 0); |
1da177e4 | 4126 | process_fd_request(); |
1da177e4 LT |
4127 | } |
4128 | ||
8d9d34e2 WT |
4129 | if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
4130 | test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) || | |
1da177e4 | 4131 | test_bit(drive, &fake_change) || |
2b51dca7 | 4132 | drive_no_geom(drive)) |
1a8a74f0 | 4133 | return DISK_EVENT_MEDIA_CHANGE; |
1da177e4 LT |
4134 | return 0; |
4135 | } | |
4136 | ||
4137 | /* | |
4138 | * This implements "read block 0" for floppy_revalidate(). | |
4139 | * Needed for format autodetection, checking whether there is | |
4140 | * a disk in the drive, and whether that disk is writable. | |
4141 | */ | |
4142 | ||
7b7b68bb JK |
4143 | struct rb0_cbdata { |
4144 | int drive; | |
4145 | struct completion complete; | |
4146 | }; | |
4147 | ||
4246a0b6 | 4148 | static void floppy_rb0_cb(struct bio *bio) |
1da177e4 | 4149 | { |
7b7b68bb JK |
4150 | struct rb0_cbdata *cbdata = (struct rb0_cbdata *)bio->bi_private; |
4151 | int drive = cbdata->drive; | |
4152 | ||
4e4cbee9 | 4153 | if (bio->bi_status) { |
4246a0b6 | 4154 | pr_info("floppy: error %d while reading block 0\n", |
4e4cbee9 | 4155 | bio->bi_status); |
8d9d34e2 | 4156 | set_bit(FD_OPEN_SHOULD_FAIL_BIT, &drive_state[drive].flags); |
7b7b68bb JK |
4157 | } |
4158 | complete(&cbdata->complete); | |
1da177e4 LT |
4159 | } |
4160 | ||
7b7b68bb | 4161 | static int __floppy_read_block_0(struct block_device *bdev, int drive) |
1da177e4 LT |
4162 | { |
4163 | struct bio bio; | |
4164 | struct bio_vec bio_vec; | |
1da177e4 | 4165 | struct page *page; |
7b7b68bb | 4166 | struct rb0_cbdata cbdata; |
1da177e4 LT |
4167 | size_t size; |
4168 | ||
4169 | page = alloc_page(GFP_NOIO); | |
4170 | if (!page) { | |
4171 | process_fd_request(); | |
4172 | return -ENOMEM; | |
4173 | } | |
4174 | ||
4175 | size = bdev->bd_block_size; | |
4176 | if (!size) | |
4177 | size = 1024; | |
4178 | ||
7b7b68bb JK |
4179 | cbdata.drive = drive; |
4180 | ||
3a83f467 | 4181 | bio_init(&bio, &bio_vec, 1); |
74d46992 | 4182 | bio_set_dev(&bio, bdev); |
2c73a603 ML |
4183 | bio_add_page(&bio, page, size, 0); |
4184 | ||
4f024f37 | 4185 | bio.bi_iter.bi_sector = 0; |
6314a108 | 4186 | bio.bi_flags |= (1 << BIO_QUIET); |
7b7b68bb JK |
4187 | bio.bi_private = &cbdata; |
4188 | bio.bi_end_io = floppy_rb0_cb; | |
95fe6c1a | 4189 | bio_set_op_attrs(&bio, REQ_OP_READ, 0); |
1da177e4 | 4190 | |
de7b75d8 JA |
4191 | init_completion(&cbdata.complete); |
4192 | ||
4e49ea4a | 4193 | submit_bio(&bio); |
1da177e4 | 4194 | process_fd_request(); |
7b7b68bb | 4195 | |
7b7b68bb | 4196 | wait_for_completion(&cbdata.complete); |
1da177e4 LT |
4197 | |
4198 | __free_page(page); | |
4199 | ||
4200 | return 0; | |
4201 | } | |
4202 | ||
4203 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading | |
4204 | * the bootblock (block 0). "Autodetection" is also needed to check whether | |
4205 | * there is a disk in the drive at all... Thus we also do it for fixed | |
4206 | * geometry formats */ | |
4207 | static int floppy_revalidate(struct gendisk *disk) | |
4208 | { | |
4209 | int drive = (long)disk->private_data; | |
1da177e4 LT |
4210 | int cf; |
4211 | int res = 0; | |
4212 | ||
8d9d34e2 WT |
4213 | if (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
4214 | test_bit(FD_VERIFY_BIT, &drive_state[drive].flags) || | |
2b51dca7 PE |
4215 | test_bit(drive, &fake_change) || |
4216 | drive_no_geom(drive)) { | |
01b6b67e SH |
4217 | if (WARN(atomic_read(&usage_count) == 0, |
4218 | "VFS: revalidate called on non-open device.\n")) | |
1da177e4 | 4219 | return -EFAULT; |
01b6b67e | 4220 | |
a0c80efe JK |
4221 | res = lock_fdc(drive); |
4222 | if (res) | |
4223 | return res; | |
8d9d34e2 WT |
4224 | cf = (test_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags) || |
4225 | test_bit(FD_VERIFY_BIT, &drive_state[drive].flags)); | |
2b51dca7 | 4226 | if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { |
1da177e4 LT |
4227 | process_fd_request(); /*already done by another thread */ |
4228 | return 0; | |
4229 | } | |
8d9d34e2 WT |
4230 | drive_state[drive].maxblock = 0; |
4231 | drive_state[drive].maxtrack = 0; | |
1da177e4 LT |
4232 | if (buffer_drive == drive) |
4233 | buffer_track = -1; | |
4234 | clear_bit(drive, &fake_change); | |
8d9d34e2 | 4235 | clear_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); |
1da177e4 | 4236 | if (cf) |
8d9d34e2 | 4237 | drive_state[drive].generation++; |
2b51dca7 | 4238 | if (drive_no_geom(drive)) { |
1da177e4 | 4239 | /* auto-sensing */ |
7b7b68bb | 4240 | res = __floppy_read_block_0(opened_bdev[drive], drive); |
1da177e4 LT |
4241 | } else { |
4242 | if (cf) | |
74f63f46 | 4243 | poll_drive(false, FD_RAW_NEED_DISK); |
1da177e4 LT |
4244 | process_fd_request(); |
4245 | } | |
4246 | } | |
8d9d34e2 | 4247 | set_capacity(disk, floppy_sizes[drive_state[drive].fd_device]); |
1da177e4 LT |
4248 | return res; |
4249 | } | |
4250 | ||
83d5cde4 | 4251 | static const struct block_device_operations floppy_fops = { |
06f748c4 | 4252 | .owner = THIS_MODULE, |
a4af9b48 AV |
4253 | .open = floppy_open, |
4254 | .release = floppy_release, | |
8a6cfeb6 | 4255 | .ioctl = fd_ioctl, |
06f748c4 | 4256 | .getgeo = fd_getgeo, |
1a8a74f0 | 4257 | .check_events = floppy_check_events, |
06f748c4 | 4258 | .revalidate_disk = floppy_revalidate, |
229b53c9 AV |
4259 | #ifdef CONFIG_COMPAT |
4260 | .compat_ioctl = fd_compat_ioctl, | |
4261 | #endif | |
1da177e4 | 4262 | }; |
1da177e4 | 4263 | |
1da177e4 LT |
4264 | /* |
4265 | * Floppy Driver initialization | |
4266 | * ============================= | |
4267 | */ | |
4268 | ||
4269 | /* Determine the floppy disk controller type */ | |
4270 | /* This routine was written by David C. Niemi */ | |
4271 | static char __init get_fdc_version(void) | |
4272 | { | |
4273 | int r; | |
4274 | ||
4275 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ | |
de6048b8 | 4276 | if (fdc_state[fdc].reset) |
1da177e4 | 4277 | return FDC_NONE; |
d7b2b2ec JP |
4278 | r = result(); |
4279 | if (r <= 0x00) | |
1da177e4 LT |
4280 | return FDC_NONE; /* No FDC present ??? */ |
4281 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 4282 | pr_info("FDC %d is an 8272A\n", fdc); |
1da177e4 LT |
4283 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ |
4284 | } | |
4285 | if (r != 10) { | |
b46df356 JP |
4286 | pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", |
4287 | fdc, r); | |
1da177e4 LT |
4288 | return FDC_UNKNOWN; |
4289 | } | |
4290 | ||
4291 | if (!fdc_configure()) { | |
b46df356 | 4292 | pr_info("FDC %d is an 82072\n", fdc); |
1da177e4 LT |
4293 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ |
4294 | } | |
4295 | ||
4296 | output_byte(FD_PERPENDICULAR); | |
4297 | if (need_more_output() == MORE_OUTPUT) { | |
4298 | output_byte(0); | |
4299 | } else { | |
b46df356 | 4300 | pr_info("FDC %d is an 82072A\n", fdc); |
1da177e4 LT |
4301 | return FDC_82072A; /* 82072A as found on Sparcs. */ |
4302 | } | |
4303 | ||
4304 | output_byte(FD_UNLOCK); | |
4305 | r = result(); | |
4306 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 4307 | pr_info("FDC %d is a pre-1991 82077\n", fdc); |
d7b2b2ec | 4308 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know |
1da177e4 LT |
4309 | * LOCK/UNLOCK */ |
4310 | } | |
4311 | if ((r != 1) || (reply_buffer[0] != 0x00)) { | |
b46df356 JP |
4312 | pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", |
4313 | fdc, r); | |
1da177e4 LT |
4314 | return FDC_UNKNOWN; |
4315 | } | |
4316 | output_byte(FD_PARTID); | |
4317 | r = result(); | |
4318 | if (r != 1) { | |
b46df356 JP |
4319 | pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", |
4320 | fdc, r); | |
1da177e4 LT |
4321 | return FDC_UNKNOWN; |
4322 | } | |
4323 | if (reply_buffer[0] == 0x80) { | |
b46df356 | 4324 | pr_info("FDC %d is a post-1991 82077\n", fdc); |
1da177e4 LT |
4325 | return FDC_82077; /* Revised 82077AA passes all the tests */ |
4326 | } | |
4327 | switch (reply_buffer[0] >> 5) { | |
4328 | case 0x0: | |
4329 | /* Either a 82078-1 or a 82078SL running at 5Volt */ | |
b46df356 | 4330 | pr_info("FDC %d is an 82078.\n", fdc); |
1da177e4 LT |
4331 | return FDC_82078; |
4332 | case 0x1: | |
b46df356 | 4333 | pr_info("FDC %d is a 44pin 82078\n", fdc); |
1da177e4 LT |
4334 | return FDC_82078; |
4335 | case 0x2: | |
b46df356 | 4336 | pr_info("FDC %d is a S82078B\n", fdc); |
1da177e4 LT |
4337 | return FDC_S82078B; |
4338 | case 0x3: | |
b46df356 | 4339 | pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); |
1da177e4 LT |
4340 | return FDC_87306; |
4341 | default: | |
b46df356 JP |
4342 | pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", |
4343 | fdc, reply_buffer[0] >> 5); | |
1da177e4 LT |
4344 | return FDC_82078_UNKN; |
4345 | } | |
4346 | } /* get_fdc_version */ | |
4347 | ||
4348 | /* lilo configuration */ | |
4349 | ||
4350 | static void __init floppy_set_flags(int *ints, int param, int param2) | |
4351 | { | |
4352 | int i; | |
4353 | ||
4354 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4355 | if (param) | |
4356 | default_drive_params[i].params.flags |= param2; | |
4357 | else | |
4358 | default_drive_params[i].params.flags &= ~param2; | |
4359 | } | |
4360 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); | |
4361 | } | |
4362 | ||
4363 | static void __init daring(int *ints, int param, int param2) | |
4364 | { | |
4365 | int i; | |
4366 | ||
4367 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4368 | if (param) { | |
4369 | default_drive_params[i].params.select_delay = 0; | |
4370 | default_drive_params[i].params.flags |= | |
4371 | FD_SILENT_DCL_CLEAR; | |
4372 | } else { | |
4373 | default_drive_params[i].params.select_delay = | |
4374 | 2 * HZ / 100; | |
4375 | default_drive_params[i].params.flags &= | |
4376 | ~FD_SILENT_DCL_CLEAR; | |
4377 | } | |
4378 | } | |
4379 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); | |
4380 | } | |
4381 | ||
4382 | static void __init set_cmos(int *ints, int dummy, int dummy2) | |
4383 | { | |
4384 | int current_drive = 0; | |
4385 | ||
4386 | if (ints[0] != 2) { | |
4387 | DPRINT("wrong number of parameters for CMOS\n"); | |
4388 | return; | |
4389 | } | |
4390 | current_drive = ints[1]; | |
4391 | if (current_drive < 0 || current_drive >= 8) { | |
4392 | DPRINT("bad drive for set_cmos\n"); | |
4393 | return; | |
4394 | } | |
4395 | #if N_FDC > 1 | |
4396 | if (current_drive >= 4 && !FDC2) | |
4397 | FDC2 = 0x370; | |
4398 | #endif | |
031faabd | 4399 | drive_params[current_drive].cmos = ints[2]; |
1da177e4 LT |
4400 | DPRINT("setting CMOS code to %d\n", ints[2]); |
4401 | } | |
4402 | ||
4403 | static struct param_table { | |
4404 | const char *name; | |
4405 | void (*fn) (int *ints, int param, int param2); | |
4406 | int *var; | |
4407 | int def_param; | |
4408 | int param2; | |
4409 | } config_params[] __initdata = { | |
4410 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4411 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4412 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, | |
4413 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, | |
4414 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, | |
4415 | {"daring", daring, NULL, 1, 0}, | |
4416 | #if N_FDC > 1 | |
4417 | {"two_fdc", NULL, &FDC2, 0x370, 0}, | |
4418 | {"one_fdc", NULL, &FDC2, 0, 0}, | |
4419 | #endif | |
4420 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, | |
4421 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, | |
4422 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, | |
4423 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, | |
4424 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, | |
4425 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, | |
4426 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, | |
4427 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, | |
4428 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, | |
4429 | {"nofifo", NULL, &no_fifo, 0x20, 0}, | |
4430 | {"usefifo", NULL, &no_fifo, 0, 0}, | |
4431 | {"cmos", set_cmos, NULL, 0, 0}, | |
4432 | {"slow", NULL, &slow_floppy, 1, 0}, | |
4433 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, | |
4434 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, | |
4435 | {"L40SX", NULL, &print_unex, 0, 0} | |
4436 | ||
4437 | EXTRA_FLOPPY_PARAMS | |
4438 | }; | |
4439 | ||
4440 | static int __init floppy_setup(char *str) | |
4441 | { | |
4442 | int i; | |
4443 | int param; | |
4444 | int ints[11]; | |
4445 | ||
4446 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
4447 | if (str) { | |
4448 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { | |
4449 | if (strcmp(str, config_params[i].name) == 0) { | |
4450 | if (ints[0]) | |
4451 | param = ints[1]; | |
4452 | else | |
4453 | param = config_params[i].def_param; | |
4454 | if (config_params[i].fn) | |
bb57f0c6 JP |
4455 | config_params[i].fn(ints, param, |
4456 | config_params[i]. | |
4457 | param2); | |
1da177e4 LT |
4458 | if (config_params[i].var) { |
4459 | DPRINT("%s=%d\n", str, param); | |
4460 | *config_params[i].var = param; | |
4461 | } | |
4462 | return 1; | |
4463 | } | |
4464 | } | |
4465 | } | |
4466 | if (str) { | |
4467 | DPRINT("unknown floppy option [%s]\n", str); | |
4468 | ||
4469 | DPRINT("allowed options are:"); | |
4470 | for (i = 0; i < ARRAY_SIZE(config_params); i++) | |
b46df356 JP |
4471 | pr_cont(" %s", config_params[i].name); |
4472 | pr_cont("\n"); | |
1da177e4 LT |
4473 | } else |
4474 | DPRINT("botched floppy option\n"); | |
e7751617 | 4475 | DPRINT("Read Documentation/admin-guide/blockdev/floppy.rst\n"); |
1da177e4 LT |
4476 | return 0; |
4477 | } | |
4478 | ||
4479 | static int have_no_fdc = -ENODEV; | |
4480 | ||
9a8af6b3 AM |
4481 | static ssize_t floppy_cmos_show(struct device *dev, |
4482 | struct device_attribute *attr, char *buf) | |
94fd0db7 | 4483 | { |
71b3e0c1 | 4484 | struct platform_device *p = to_platform_device(dev); |
9a8af6b3 | 4485 | int drive; |
94fd0db7 | 4486 | |
9a8af6b3 | 4487 | drive = p->id; |
1ce9ae96 | 4488 | return sprintf(buf, "%X\n", drive_params[drive].cmos); |
94fd0db7 | 4489 | } |
48c8cee6 | 4490 | |
5657a819 | 4491 | static DEVICE_ATTR(cmos, 0444, floppy_cmos_show, NULL); |
94fd0db7 | 4492 | |
b7f120b2 TI |
4493 | static struct attribute *floppy_dev_attrs[] = { |
4494 | &dev_attr_cmos.attr, | |
4495 | NULL | |
4496 | }; | |
4497 | ||
4498 | ATTRIBUTE_GROUPS(floppy_dev); | |
4499 | ||
1da177e4 LT |
4500 | static void floppy_device_release(struct device *dev) |
4501 | { | |
1da177e4 LT |
4502 | } |
4503 | ||
c90cd332 | 4504 | static int floppy_resume(struct device *dev) |
5e50b9ef OZ |
4505 | { |
4506 | int fdc; | |
4507 | ||
4508 | for (fdc = 0; fdc < N_FDC; fdc++) | |
de6048b8 | 4509 | if (fdc_state[fdc].address != -1) |
74f63f46 | 4510 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
5e50b9ef OZ |
4511 | |
4512 | return 0; | |
4513 | } | |
4514 | ||
47145210 | 4515 | static const struct dev_pm_ops floppy_pm_ops = { |
5e50b9ef | 4516 | .resume = floppy_resume, |
c90cd332 FP |
4517 | .restore = floppy_resume, |
4518 | }; | |
4519 | ||
4520 | static struct platform_driver floppy_driver = { | |
5e50b9ef | 4521 | .driver = { |
bb57f0c6 JP |
4522 | .name = "floppy", |
4523 | .pm = &floppy_pm_ops, | |
5e50b9ef OZ |
4524 | }, |
4525 | }; | |
4526 | ||
a9f38e1d OS |
4527 | static const struct blk_mq_ops floppy_mq_ops = { |
4528 | .queue_rq = floppy_queue_rq, | |
4529 | }; | |
4530 | ||
94fd0db7 | 4531 | static struct platform_device floppy_device[N_DRIVE]; |
1da177e4 | 4532 | |
8d3ab4eb HRK |
4533 | static bool floppy_available(int drive) |
4534 | { | |
4535 | if (!(allowed_drive_mask & (1 << drive))) | |
4536 | return false; | |
4537 | if (fdc_state[FDC(drive)].version == FDC_NONE) | |
4538 | return false; | |
4539 | return true; | |
4540 | } | |
4541 | ||
1da177e4 LT |
4542 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) |
4543 | { | |
4544 | int drive = (*part & 3) | ((*part & 0x80) >> 5); | |
8d3ab4eb | 4545 | if (drive >= N_DRIVE || !floppy_available(drive)) |
1da177e4 | 4546 | return NULL; |
945f390f | 4547 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
1da177e4 LT |
4548 | return NULL; |
4549 | *part = 0; | |
3079c22e | 4550 | return get_disk_and_module(disks[drive]); |
1da177e4 LT |
4551 | } |
4552 | ||
0cc15d03 | 4553 | static int __init do_floppy_init(void) |
1da177e4 | 4554 | { |
1a4ae43e | 4555 | int i, unit, drive, err; |
1da177e4 | 4556 | |
285203c8 SH |
4557 | set_debugt(); |
4558 | interruptjiffies = resultjiffies = jiffies; | |
4559 | ||
68e1ee62 | 4560 | #if defined(CONFIG_PPC) |
ef16b519 OH |
4561 | if (check_legacy_ioport(FDC1)) |
4562 | return -ENODEV; | |
4563 | #endif | |
4564 | ||
1da177e4 LT |
4565 | raw_cmd = NULL; |
4566 | ||
b54e1f88 HRK |
4567 | floppy_wq = alloc_ordered_workqueue("floppy", 0); |
4568 | if (!floppy_wq) | |
4569 | return -ENOMEM; | |
4570 | ||
1a4ae43e HRK |
4571 | for (drive = 0; drive < N_DRIVE; drive++) { |
4572 | disks[drive] = alloc_disk(1); | |
4573 | if (!disks[drive]) { | |
1da177e4 LT |
4574 | err = -ENOMEM; |
4575 | goto out_put_disk; | |
4576 | } | |
4577 | ||
a9f38e1d OS |
4578 | disks[drive]->queue = blk_mq_init_sq_queue(&tag_sets[drive], |
4579 | &floppy_mq_ops, 2, | |
4580 | BLK_MQ_F_SHOULD_MERGE); | |
4581 | if (IS_ERR(disks[drive]->queue)) { | |
4582 | err = PTR_ERR(disks[drive]->queue); | |
4583 | disks[drive]->queue = NULL; | |
b54e1f88 | 4584 | goto out_put_disk; |
48821184 JA |
4585 | } |
4586 | ||
8fc45044 | 4587 | blk_queue_bounce_limit(disks[drive]->queue, BLK_BOUNCE_HIGH); |
1a4ae43e HRK |
4588 | blk_queue_max_hw_sectors(disks[drive]->queue, 64); |
4589 | disks[drive]->major = FLOPPY_MAJOR; | |
4590 | disks[drive]->first_minor = TOMINOR(drive); | |
4591 | disks[drive]->fops = &floppy_fops; | |
773008f6 | 4592 | disks[drive]->events = DISK_EVENT_MEDIA_CHANGE; |
1a4ae43e | 4593 | sprintf(disks[drive]->disk_name, "fd%d", drive); |
1da177e4 | 4594 | |
b1bf4210 | 4595 | timer_setup(&motor_off_timer[drive], motor_off_callback, 0); |
1da177e4 LT |
4596 | } |
4597 | ||
1da177e4 LT |
4598 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4599 | if (err) | |
8ab5e4c1 | 4600 | goto out_put_disk; |
1da177e4 | 4601 | |
5e50b9ef OZ |
4602 | err = platform_driver_register(&floppy_driver); |
4603 | if (err) | |
4604 | goto out_unreg_blkdev; | |
4605 | ||
1da177e4 LT |
4606 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
4607 | floppy_find, NULL, NULL); | |
4608 | ||
4609 | for (i = 0; i < 256; i++) | |
4610 | if (ITYPE(i)) | |
4611 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; | |
4612 | else | |
4613 | floppy_sizes[i] = MAX_DISK_SIZE << 1; | |
4614 | ||
73507e6c | 4615 | reschedule_timeout(MAXTIMEOUT, "floppy init"); |
1da177e4 LT |
4616 | config_types(); |
4617 | ||
4618 | for (i = 0; i < N_FDC; i++) { | |
4619 | fdc = i; | |
de6048b8 WT |
4620 | memset(&fdc_state[fdc], 0, sizeof(*fdc_state)); |
4621 | fdc_state[fdc].dtr = -1; | |
4622 | fdc_state[fdc].dor = 0x4; | |
1da177e4 | 4623 | #if defined(__sparc__) || defined(__mc68000__) |
96534f1d | 4624 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ |
1da177e4 LT |
4625 | #ifdef __mc68000__ |
4626 | if (MACH_IS_SUN3X) | |
4627 | #endif | |
de6048b8 | 4628 | fdc_state[fdc].version = FDC_82072A; |
1da177e4 LT |
4629 | #endif |
4630 | } | |
4631 | ||
4632 | use_virtual_dma = can_use_virtual_dma & 1; | |
1da177e4 LT |
4633 | fdc_state[0].address = FDC1; |
4634 | if (fdc_state[0].address == -1) { | |
070ad7e7 | 4635 | cancel_delayed_work(&fd_timeout); |
1da177e4 LT |
4636 | err = -ENODEV; |
4637 | goto out_unreg_region; | |
4638 | } | |
4639 | #if N_FDC > 1 | |
4640 | fdc_state[1].address = FDC2; | |
4641 | #endif | |
4642 | ||
4643 | fdc = 0; /* reset fdc in case of unexpected interrupt */ | |
4644 | err = floppy_grab_irq_and_dma(); | |
4645 | if (err) { | |
070ad7e7 | 4646 | cancel_delayed_work(&fd_timeout); |
1da177e4 LT |
4647 | err = -EBUSY; |
4648 | goto out_unreg_region; | |
4649 | } | |
4650 | ||
4651 | /* initialise drive state */ | |
4652 | for (drive = 0; drive < N_DRIVE; drive++) { | |
8d9d34e2 | 4653 | memset(&drive_state[drive], 0, sizeof(drive_state[drive])); |
121e2979 | 4654 | memset(&write_errors[drive], 0, sizeof(write_errors[drive])); |
8d9d34e2 WT |
4655 | set_bit(FD_DISK_NEWCHANGE_BIT, &drive_state[drive].flags); |
4656 | set_bit(FD_DISK_CHANGED_BIT, &drive_state[drive].flags); | |
4657 | set_bit(FD_VERIFY_BIT, &drive_state[drive].flags); | |
4658 | drive_state[drive].fd_device = -1; | |
1da177e4 LT |
4659 | floppy_track_buffer = NULL; |
4660 | max_buffer_sectors = 0; | |
4661 | } | |
4662 | /* | |
4663 | * Small 10 msec delay to let through any interrupt that | |
4664 | * initialization might have triggered, to not | |
4665 | * confuse detection: | |
4666 | */ | |
4667 | msleep(10); | |
4668 | ||
4669 | for (i = 0; i < N_FDC; i++) { | |
4670 | fdc = i; | |
de6048b8 | 4671 | fdc_state[fdc].driver_version = FD_DRIVER_VERSION; |
1da177e4 | 4672 | for (unit = 0; unit < 4; unit++) |
de6048b8 WT |
4673 | fdc_state[fdc].track[unit] = 0; |
4674 | if (fdc_state[fdc].address == -1) | |
1da177e4 | 4675 | continue; |
de6048b8 | 4676 | fdc_state[fdc].rawcmd = 2; |
74f63f46 | 4677 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { |
1da177e4 | 4678 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
5a74db06 | 4679 | floppy_release_regions(fdc); |
de6048b8 WT |
4680 | fdc_state[fdc].address = -1; |
4681 | fdc_state[fdc].version = FDC_NONE; | |
1da177e4 LT |
4682 | continue; |
4683 | } | |
4684 | /* Try to determine the floppy controller type */ | |
de6048b8 WT |
4685 | fdc_state[fdc].version = get_fdc_version(); |
4686 | if (fdc_state[fdc].version == FDC_NONE) { | |
1da177e4 | 4687 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
5a74db06 | 4688 | floppy_release_regions(fdc); |
de6048b8 | 4689 | fdc_state[fdc].address = -1; |
1da177e4 LT |
4690 | continue; |
4691 | } | |
de6048b8 | 4692 | if (can_use_virtual_dma == 2 && fdc_state[fdc].version < FDC_82072A) |
1da177e4 LT |
4693 | can_use_virtual_dma = 0; |
4694 | ||
4695 | have_no_fdc = 0; | |
4696 | /* Not all FDCs seem to be able to handle the version command | |
4697 | * properly, so force a reset for the standard FDC clones, | |
4698 | * to avoid interrupt garbage. | |
4699 | */ | |
74f63f46 | 4700 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
1da177e4 LT |
4701 | } |
4702 | fdc = 0; | |
070ad7e7 | 4703 | cancel_delayed_work(&fd_timeout); |
1da177e4 | 4704 | current_drive = 0; |
29f1c784 | 4705 | initialized = true; |
1da177e4 LT |
4706 | if (have_no_fdc) { |
4707 | DPRINT("no floppy controllers found\n"); | |
4708 | err = have_no_fdc; | |
070ad7e7 | 4709 | goto out_release_dma; |
1da177e4 LT |
4710 | } |
4711 | ||
1da177e4 | 4712 | for (drive = 0; drive < N_DRIVE; drive++) { |
8d3ab4eb | 4713 | if (!floppy_available(drive)) |
1da177e4 | 4714 | continue; |
94fd0db7 HR |
4715 | |
4716 | floppy_device[drive].name = floppy_device_name; | |
4717 | floppy_device[drive].id = drive; | |
4718 | floppy_device[drive].dev.release = floppy_device_release; | |
b7f120b2 | 4719 | floppy_device[drive].dev.groups = floppy_dev_groups; |
94fd0db7 HR |
4720 | |
4721 | err = platform_device_register(&floppy_device[drive]); | |
4722 | if (err) | |
d60e7ec1 | 4723 | goto out_remove_drives; |
94fd0db7 | 4724 | |
1da177e4 LT |
4725 | /* to be cleaned up... */ |
4726 | disks[drive]->private_data = (void *)(long)drive; | |
1da177e4 | 4727 | disks[drive]->flags |= GENHD_FL_REMOVABLE; |
fef912bf | 4728 | device_add_disk(&floppy_device[drive].dev, disks[drive], NULL); |
1da177e4 LT |
4729 | } |
4730 | ||
4731 | return 0; | |
4732 | ||
d60e7ec1 HRK |
4733 | out_remove_drives: |
4734 | while (drive--) { | |
8d3ab4eb | 4735 | if (floppy_available(drive)) { |
d60e7ec1 | 4736 | del_gendisk(disks[drive]); |
d60e7ec1 HRK |
4737 | platform_device_unregister(&floppy_device[drive]); |
4738 | } | |
4739 | } | |
070ad7e7 | 4740 | out_release_dma: |
575cfc67 | 4741 | if (atomic_read(&usage_count)) |
1da177e4 LT |
4742 | floppy_release_irq_and_dma(); |
4743 | out_unreg_region: | |
4744 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
5e50b9ef | 4745 | platform_driver_unregister(&floppy_driver); |
1da177e4 LT |
4746 | out_unreg_blkdev: |
4747 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1da177e4 | 4748 | out_put_disk: |
eac7cc52 | 4749 | destroy_workqueue(floppy_wq); |
1a4ae43e HRK |
4750 | for (drive = 0; drive < N_DRIVE; drive++) { |
4751 | if (!disks[drive]) | |
4752 | break; | |
4753 | if (disks[drive]->queue) { | |
4754 | del_timer_sync(&motor_off_timer[drive]); | |
4755 | blk_cleanup_queue(disks[drive]->queue); | |
4756 | disks[drive]->queue = NULL; | |
a9f38e1d | 4757 | blk_mq_free_tag_set(&tag_sets[drive]); |
3f9a5aab | 4758 | } |
1a4ae43e | 4759 | put_disk(disks[drive]); |
1da177e4 LT |
4760 | } |
4761 | return err; | |
4762 | } | |
4763 | ||
0cc15d03 AK |
4764 | #ifndef MODULE |
4765 | static __init void floppy_async_init(void *data, async_cookie_t cookie) | |
4766 | { | |
4767 | do_floppy_init(); | |
4768 | } | |
4769 | #endif | |
4770 | ||
4771 | static int __init floppy_init(void) | |
4772 | { | |
4773 | #ifdef MODULE | |
4774 | return do_floppy_init(); | |
4775 | #else | |
4776 | /* Don't hold up the bootup by the floppy initialization */ | |
4777 | async_schedule(floppy_async_init, NULL); | |
4778 | return 0; | |
4779 | #endif | |
4780 | } | |
4781 | ||
5a74db06 PDM |
4782 | static const struct io_region { |
4783 | int offset; | |
4784 | int size; | |
4785 | } io_regions[] = { | |
4786 | { 2, 1 }, | |
4787 | /* address + 3 is sometimes reserved by pnp bios for motherboard */ | |
4788 | { 4, 2 }, | |
4789 | /* address + 6 is reserved, and may be taken by IDE. | |
4790 | * Unfortunately, Adaptec doesn't know this :-(, */ | |
4791 | { 7, 1 }, | |
4792 | }; | |
4793 | ||
4794 | static void floppy_release_allocated_regions(int fdc, const struct io_region *p) | |
4795 | { | |
4796 | while (p != io_regions) { | |
4797 | p--; | |
de6048b8 | 4798 | release_region(fdc_state[fdc].address + p->offset, p->size); |
5a74db06 PDM |
4799 | } |
4800 | } | |
4801 | ||
4802 | #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) | |
4803 | ||
4804 | static int floppy_request_regions(int fdc) | |
4805 | { | |
4806 | const struct io_region *p; | |
4807 | ||
4808 | for (p = io_regions; p < ARRAY_END(io_regions); p++) { | |
de6048b8 | 4809 | if (!request_region(fdc_state[fdc].address + p->offset, |
bb57f0c6 JP |
4810 | p->size, "floppy")) { |
4811 | DPRINT("Floppy io-port 0x%04lx in use\n", | |
de6048b8 | 4812 | fdc_state[fdc].address + p->offset); |
5a74db06 PDM |
4813 | floppy_release_allocated_regions(fdc, p); |
4814 | return -EBUSY; | |
4815 | } | |
4816 | } | |
4817 | return 0; | |
4818 | } | |
4819 | ||
4820 | static void floppy_release_regions(int fdc) | |
4821 | { | |
4822 | floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); | |
4823 | } | |
4824 | ||
1da177e4 LT |
4825 | static int floppy_grab_irq_and_dma(void) |
4826 | { | |
575cfc67 | 4827 | if (atomic_inc_return(&usage_count) > 1) |
1da177e4 | 4828 | return 0; |
6dc659d8 IM |
4829 | |
4830 | /* | |
4831 | * We might have scheduled a free_irq(), wait it to | |
4832 | * drain first: | |
4833 | */ | |
070ad7e7 | 4834 | flush_workqueue(floppy_wq); |
6dc659d8 | 4835 | |
1da177e4 LT |
4836 | if (fd_request_irq()) { |
4837 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", | |
4838 | FLOPPY_IRQ); | |
575cfc67 | 4839 | atomic_dec(&usage_count); |
1da177e4 LT |
4840 | return -1; |
4841 | } | |
4842 | if (fd_request_dma()) { | |
4843 | DPRINT("Unable to grab DMA%d for the floppy driver\n", | |
4844 | FLOPPY_DMA); | |
2e9c47cd JB |
4845 | if (can_use_virtual_dma & 2) |
4846 | use_virtual_dma = can_use_virtual_dma = 1; | |
4847 | if (!(can_use_virtual_dma & 1)) { | |
4848 | fd_free_irq(); | |
575cfc67 | 4849 | atomic_dec(&usage_count); |
2e9c47cd JB |
4850 | return -1; |
4851 | } | |
1da177e4 LT |
4852 | } |
4853 | ||
4854 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
de6048b8 | 4855 | if (fdc_state[fdc].address != -1) { |
5a74db06 PDM |
4856 | if (floppy_request_regions(fdc)) |
4857 | goto cleanup; | |
1da177e4 LT |
4858 | } |
4859 | } | |
4860 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
de6048b8 | 4861 | if (fdc_state[fdc].address != -1) { |
1da177e4 | 4862 | reset_fdc_info(1); |
de6048b8 | 4863 | fd_outb(fdc_state[fdc].dor, FD_DOR); |
1da177e4 LT |
4864 | } |
4865 | } | |
4866 | fdc = 0; | |
4867 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ | |
4868 | ||
4869 | for (fdc = 0; fdc < N_FDC; fdc++) | |
de6048b8 WT |
4870 | if (fdc_state[fdc].address != -1) |
4871 | fd_outb(fdc_state[fdc].dor, FD_DOR); | |
1da177e4 | 4872 | /* |
06f748c4 JJ |
4873 | * The driver will try and free resources and relies on us |
4874 | * to know if they were allocated or not. | |
1da177e4 LT |
4875 | */ |
4876 | fdc = 0; | |
4877 | irqdma_allocated = 1; | |
4878 | return 0; | |
5a74db06 | 4879 | cleanup: |
1da177e4 LT |
4880 | fd_free_irq(); |
4881 | fd_free_dma(); | |
5a74db06 PDM |
4882 | while (--fdc >= 0) |
4883 | floppy_release_regions(fdc); | |
575cfc67 | 4884 | atomic_dec(&usage_count); |
1da177e4 LT |
4885 | return -1; |
4886 | } | |
4887 | ||
4888 | static void floppy_release_irq_and_dma(void) | |
4889 | { | |
4890 | int old_fdc; | |
1da177e4 LT |
4891 | #ifndef __sparc__ |
4892 | int drive; | |
1da177e4 LT |
4893 | #endif |
4894 | long tmpsize; | |
4895 | unsigned long tmpaddr; | |
1da177e4 | 4896 | |
575cfc67 | 4897 | if (!atomic_dec_and_test(&usage_count)) |
1da177e4 | 4898 | return; |
575cfc67 | 4899 | |
1da177e4 LT |
4900 | if (irqdma_allocated) { |
4901 | fd_disable_dma(); | |
4902 | fd_free_dma(); | |
3e541a4a | 4903 | fd_free_irq(); |
1da177e4 LT |
4904 | irqdma_allocated = 0; |
4905 | } | |
4906 | set_dor(0, ~0, 8); | |
4907 | #if N_FDC > 1 | |
4908 | set_dor(1, ~8, 0); | |
4909 | #endif | |
1da177e4 LT |
4910 | |
4911 | if (floppy_track_buffer && max_buffer_sectors) { | |
4912 | tmpsize = max_buffer_sectors * 1024; | |
4913 | tmpaddr = (unsigned long)floppy_track_buffer; | |
4914 | floppy_track_buffer = NULL; | |
4915 | max_buffer_sectors = 0; | |
4916 | buffer_min = buffer_max = -1; | |
4917 | fd_dma_mem_free(tmpaddr, tmpsize); | |
4918 | } | |
1da177e4 LT |
4919 | #ifndef __sparc__ |
4920 | for (drive = 0; drive < N_FDC * 4; drive++) | |
4921 | if (timer_pending(motor_off_timer + drive)) | |
b46df356 | 4922 | pr_info("motor off timer %d still active\n", drive); |
1da177e4 LT |
4923 | #endif |
4924 | ||
070ad7e7 | 4925 | if (delayed_work_pending(&fd_timeout)) |
b46df356 | 4926 | pr_info("floppy timer still active:%s\n", timeout_message); |
070ad7e7 | 4927 | if (delayed_work_pending(&fd_timer)) |
b46df356 | 4928 | pr_info("auxiliary floppy timer still active\n"); |
365970a1 | 4929 | if (work_pending(&floppy_work)) |
b46df356 | 4930 | pr_info("work still pending\n"); |
1da177e4 LT |
4931 | old_fdc = fdc; |
4932 | for (fdc = 0; fdc < N_FDC; fdc++) | |
de6048b8 | 4933 | if (fdc_state[fdc].address != -1) |
5a74db06 | 4934 | floppy_release_regions(fdc); |
1da177e4 LT |
4935 | fdc = old_fdc; |
4936 | } | |
4937 | ||
4938 | #ifdef MODULE | |
4939 | ||
4940 | static char *floppy; | |
4941 | ||
1da177e4 LT |
4942 | static void __init parse_floppy_cfg_string(char *cfg) |
4943 | { | |
4944 | char *ptr; | |
4945 | ||
4946 | while (*cfg) { | |
bb57f0c6 JP |
4947 | ptr = cfg; |
4948 | while (*cfg && *cfg != ' ' && *cfg != '\t') | |
4949 | cfg++; | |
1da177e4 LT |
4950 | if (*cfg) { |
4951 | *cfg = '\0'; | |
4952 | cfg++; | |
4953 | } | |
4954 | if (*ptr) | |
4955 | floppy_setup(ptr); | |
4956 | } | |
4957 | } | |
4958 | ||
7afea3bc | 4959 | static int __init floppy_module_init(void) |
1da177e4 LT |
4960 | { |
4961 | if (floppy) | |
4962 | parse_floppy_cfg_string(floppy); | |
4963 | return floppy_init(); | |
4964 | } | |
7afea3bc | 4965 | module_init(floppy_module_init); |
1da177e4 | 4966 | |
7afea3bc | 4967 | static void __exit floppy_module_exit(void) |
1da177e4 LT |
4968 | { |
4969 | int drive; | |
4970 | ||
1da177e4 LT |
4971 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4972 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
5e50b9ef | 4973 | platform_driver_unregister(&floppy_driver); |
1da177e4 | 4974 | |
eac7cc52 JK |
4975 | destroy_workqueue(floppy_wq); |
4976 | ||
1da177e4 LT |
4977 | for (drive = 0; drive < N_DRIVE; drive++) { |
4978 | del_timer_sync(&motor_off_timer[drive]); | |
4979 | ||
8d3ab4eb | 4980 | if (floppy_available(drive)) { |
1da177e4 | 4981 | del_gendisk(disks[drive]); |
94fd0db7 | 4982 | platform_device_unregister(&floppy_device[drive]); |
1da177e4 | 4983 | } |
48821184 | 4984 | blk_cleanup_queue(disks[drive]->queue); |
a9f38e1d | 4985 | blk_mq_free_tag_set(&tag_sets[drive]); |
4609dff6 VG |
4986 | |
4987 | /* | |
4988 | * These disks have not called add_disk(). Don't put down | |
4989 | * queue reference in put_disk(). | |
4990 | */ | |
4991 | if (!(allowed_drive_mask & (1 << drive)) || | |
4992 | fdc_state[FDC(drive)].version == FDC_NONE) | |
4993 | disks[drive]->queue = NULL; | |
4994 | ||
d017bf6b | 4995 | put_disk(disks[drive]); |
1da177e4 | 4996 | } |
1da177e4 | 4997 | |
070ad7e7 JK |
4998 | cancel_delayed_work_sync(&fd_timeout); |
4999 | cancel_delayed_work_sync(&fd_timer); | |
1da177e4 | 5000 | |
575cfc67 | 5001 | if (atomic_read(&usage_count)) |
1da177e4 LT |
5002 | floppy_release_irq_and_dma(); |
5003 | ||
5004 | /* eject disk, if any */ | |
5005 | fd_eject(0); | |
1da177e4 | 5006 | } |
48c8cee6 | 5007 | |
7afea3bc | 5008 | module_exit(floppy_module_exit); |
1da177e4 LT |
5009 | |
5010 | module_param(floppy, charp, 0); | |
5011 | module_param(FLOPPY_IRQ, int, 0); | |
5012 | module_param(FLOPPY_DMA, int, 0); | |
5013 | MODULE_AUTHOR("Alain L. Knaff"); | |
5014 | MODULE_SUPPORTED_DEVICE("fd"); | |
5015 | MODULE_LICENSE("GPL"); | |
5016 | ||
83f9ef46 SJR |
5017 | /* This doesn't actually get used other than for module information */ |
5018 | static const struct pnp_device_id floppy_pnpids[] = { | |
48c8cee6 JP |
5019 | {"PNP0700", 0}, |
5020 | {} | |
83f9ef46 | 5021 | }; |
48c8cee6 | 5022 | |
83f9ef46 SJR |
5023 | MODULE_DEVICE_TABLE(pnp, floppy_pnpids); |
5024 | ||
1da177e4 LT |
5025 | #else |
5026 | ||
5027 | __setup("floppy=", floppy_setup); | |
5028 | module_init(floppy_init) | |
5029 | #endif | |
5030 | ||
5031 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |