Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * linux/drivers/block/floppy.c | |
3 | * | |
4 | * Copyright (C) 1991, 1992 Linus Torvalds | |
5 | * Copyright (C) 1993, 1994 Alain Knaff | |
6 | * Copyright (C) 1998 Alan Cox | |
7 | */ | |
06f748c4 | 8 | |
1da177e4 LT |
9 | /* |
10 | * 02.12.91 - Changed to static variables to indicate need for reset | |
11 | * and recalibrate. This makes some things easier (output_byte reset | |
12 | * checking etc), and means less interrupt jumping in case of errors, | |
13 | * so the code is hopefully easier to understand. | |
14 | */ | |
15 | ||
16 | /* | |
17 | * This file is certainly a mess. I've tried my best to get it working, | |
18 | * but I don't like programming floppies, and I have only one anyway. | |
19 | * Urgel. I should check for more errors, and do more graceful error | |
20 | * recovery. Seems there are problems with several drives. I've tried to | |
21 | * correct them. No promises. | |
22 | */ | |
23 | ||
24 | /* | |
25 | * As with hd.c, all routines within this file can (and will) be called | |
26 | * by interrupts, so extreme caution is needed. A hardware interrupt | |
27 | * handler may not sleep, or a kernel panic will happen. Thus I cannot | |
28 | * call "floppy-on" directly, but have to set a special timer interrupt | |
29 | * etc. | |
30 | */ | |
31 | ||
32 | /* | |
33 | * 28.02.92 - made track-buffering routines, based on the routines written | |
34 | * by entropy@wintermute.wpi.edu (Lawrence Foard). Linus. | |
35 | */ | |
36 | ||
37 | /* | |
38 | * Automatic floppy-detection and formatting written by Werner Almesberger | |
39 | * (almesber@nessie.cs.id.ethz.ch), who also corrected some problems with | |
40 | * the floppy-change signal detection. | |
41 | */ | |
42 | ||
43 | /* | |
44 | * 1992/7/22 -- Hennus Bergman: Added better error reporting, fixed | |
45 | * FDC data overrun bug, added some preliminary stuff for vertical | |
46 | * recording support. | |
47 | * | |
48 | * 1992/9/17: Added DMA allocation & DMA functions. -- hhb. | |
49 | * | |
50 | * TODO: Errors are still not counted properly. | |
51 | */ | |
52 | ||
53 | /* 1992/9/20 | |
54 | * Modifications for ``Sector Shifting'' by Rob Hooft (hooft@chem.ruu.nl) | |
55 | * modeled after the freeware MS-DOS program fdformat/88 V1.8 by | |
56 | * Christoph H. Hochst\"atter. | |
57 | * I have fixed the shift values to the ones I always use. Maybe a new | |
58 | * ioctl() should be created to be able to modify them. | |
59 | * There is a bug in the driver that makes it impossible to format a | |
60 | * floppy as the first thing after bootup. | |
61 | */ | |
62 | ||
63 | /* | |
64 | * 1993/4/29 -- Linus -- cleaned up the timer handling in the kernel, and | |
65 | * this helped the floppy driver as well. Much cleaner, and still seems to | |
66 | * work. | |
67 | */ | |
68 | ||
69 | /* 1994/6/24 --bbroad-- added the floppy table entries and made | |
70 | * minor modifications to allow 2.88 floppies to be run. | |
71 | */ | |
72 | ||
73 | /* 1994/7/13 -- Paul Vojta -- modified the probing code to allow three or more | |
74 | * disk types. | |
75 | */ | |
76 | ||
77 | /* | |
78 | * 1994/8/8 -- Alain Knaff -- Switched to fdpatch driver: Support for bigger | |
79 | * format bug fixes, but unfortunately some new bugs too... | |
80 | */ | |
81 | ||
82 | /* 1994/9/17 -- Koen Holtman -- added logging of physical floppy write | |
83 | * errors to allow safe writing by specialized programs. | |
84 | */ | |
85 | ||
86 | /* 1995/4/24 -- Dan Fandrich -- added support for Commodore 1581 3.5" disks | |
87 | * by defining bit 1 of the "stretch" parameter to mean put sectors on the | |
88 | * opposite side of the disk, leaving the sector IDs alone (i.e. Commodore's | |
89 | * drives are "upside-down"). | |
90 | */ | |
91 | ||
92 | /* | |
93 | * 1995/8/26 -- Andreas Busse -- added Mips support. | |
94 | */ | |
95 | ||
96 | /* | |
97 | * 1995/10/18 -- Ralf Baechle -- Portability cleanup; move machine dependent | |
98 | * features to asm/floppy.h. | |
99 | */ | |
100 | ||
b88b0985 JN |
101 | /* |
102 | * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support | |
103 | */ | |
104 | ||
1da177e4 LT |
105 | /* |
106 | * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of | |
107 | * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & | |
108 | * use of '0' for NULL. | |
109 | */ | |
110 | ||
111 | /* | |
112 | * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation | |
113 | * failures. | |
114 | */ | |
115 | ||
116 | /* | |
117 | * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. | |
118 | */ | |
119 | ||
120 | /* | |
121 | * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 | |
122 | * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were | |
123 | * being used to store jiffies, which are unsigned longs). | |
124 | */ | |
125 | ||
126 | /* | |
127 | * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
128 | * - get rid of check_region | |
129 | * - s/suser/capable/ | |
130 | */ | |
131 | ||
132 | /* | |
133 | * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no | |
134 | * floppy controller (lingering task on list after module is gone... boom.) | |
135 | */ | |
136 | ||
137 | /* | |
138 | * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range | |
139 | * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix | |
140 | * requires many non-obvious changes in arch dependent code. | |
141 | */ | |
142 | ||
143 | /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. | |
144 | * Better audit of register_blkdev. | |
145 | */ | |
146 | ||
1da177e4 LT |
147 | #undef FLOPPY_SILENT_DCL_CLEAR |
148 | ||
149 | #define REALLY_SLOW_IO | |
150 | ||
151 | #define DEBUGT 2 | |
1da177e4 | 152 | |
891eda80 JP |
153 | #define DPRINT(format, args...) \ |
154 | pr_info("floppy%d: " format, current_drive, ##args) | |
155 | ||
156 | #define DCL_DEBUG /* debug disk change line */ | |
87f530d8 JP |
157 | #ifdef DCL_DEBUG |
158 | #define debug_dcl(test, fmt, args...) \ | |
159 | do { if ((test) & FD_DEBUG) DPRINT(fmt, ##args); } while (0) | |
160 | #else | |
161 | #define debug_dcl(test, fmt, args...) \ | |
162 | do { if (0) DPRINT(fmt, ##args); } while (0) | |
163 | #endif | |
164 | ||
1da177e4 LT |
165 | /* do print messages for unexpected interrupts */ |
166 | static int print_unex = 1; | |
167 | #include <linux/module.h> | |
168 | #include <linux/sched.h> | |
169 | #include <linux/fs.h> | |
170 | #include <linux/kernel.h> | |
171 | #include <linux/timer.h> | |
172 | #include <linux/workqueue.h> | |
173 | #define FDPATCHES | |
174 | #include <linux/fdreg.h> | |
1da177e4 LT |
175 | #include <linux/fd.h> |
176 | #include <linux/hdreg.h> | |
1da177e4 LT |
177 | #include <linux/errno.h> |
178 | #include <linux/slab.h> | |
179 | #include <linux/mm.h> | |
180 | #include <linux/bio.h> | |
181 | #include <linux/string.h> | |
50297cbf | 182 | #include <linux/jiffies.h> |
1da177e4 LT |
183 | #include <linux/fcntl.h> |
184 | #include <linux/delay.h> | |
185 | #include <linux/mc146818rtc.h> /* CMOS defines */ | |
186 | #include <linux/ioport.h> | |
187 | #include <linux/interrupt.h> | |
188 | #include <linux/init.h> | |
d052d1be | 189 | #include <linux/platform_device.h> |
83f9ef46 | 190 | #include <linux/mod_devicetable.h> |
1da177e4 | 191 | #include <linux/buffer_head.h> /* for invalidate_buffers() */ |
b1c82b5c | 192 | #include <linux/mutex.h> |
d4937543 JP |
193 | #include <linux/io.h> |
194 | #include <linux/uaccess.h> | |
1da177e4 LT |
195 | |
196 | /* | |
197 | * PS/2 floppies have much slower step rates than regular floppies. | |
198 | * It's been recommended that take about 1/4 of the default speed | |
199 | * in some more extreme cases. | |
200 | */ | |
2a48fc0a | 201 | static DEFINE_MUTEX(floppy_mutex); |
1da177e4 LT |
202 | static int slow_floppy; |
203 | ||
204 | #include <asm/dma.h> | |
205 | #include <asm/irq.h> | |
206 | #include <asm/system.h> | |
1da177e4 LT |
207 | |
208 | static int FLOPPY_IRQ = 6; | |
209 | static int FLOPPY_DMA = 2; | |
210 | static int can_use_virtual_dma = 2; | |
211 | /* ======= | |
212 | * can use virtual DMA: | |
213 | * 0 = use of virtual DMA disallowed by config | |
214 | * 1 = use of virtual DMA prescribed by config | |
215 | * 2 = no virtual DMA preference configured. By default try hard DMA, | |
216 | * but fall back on virtual DMA when not enough memory available | |
217 | */ | |
218 | ||
219 | static int use_virtual_dma; | |
220 | /* ======= | |
221 | * use virtual DMA | |
222 | * 0 using hard DMA | |
223 | * 1 using virtual DMA | |
224 | * This variable is set to virtual when a DMA mem problem arises, and | |
225 | * reset back in floppy_grab_irq_and_dma. | |
226 | * It is not safe to reset it in other circumstances, because the floppy | |
227 | * driver may have several buffers in use at once, and we do currently not | |
228 | * record each buffers capabilities | |
229 | */ | |
230 | ||
231 | static DEFINE_SPINLOCK(floppy_lock); | |
1da177e4 LT |
232 | |
233 | static unsigned short virtual_dma_port = 0x3f0; | |
7d12e780 | 234 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
1da177e4 | 235 | static int set_dor(int fdc, char mask, char data); |
1da177e4 LT |
236 | |
237 | #define K_64 0x10000 /* 64KB */ | |
238 | ||
239 | /* the following is the mask of allowed drives. By default units 2 and | |
240 | * 3 of both floppy controllers are disabled, because switching on the | |
241 | * motor of these drives causes system hangs on some PCI computers. drive | |
242 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if | |
243 | * a drive is allowed. | |
244 | * | |
245 | * NOTE: This must come before we include the arch floppy header because | |
246 | * some ports reference this variable from there. -DaveM | |
247 | */ | |
248 | ||
249 | static int allowed_drive_mask = 0x33; | |
250 | ||
251 | #include <asm/floppy.h> | |
252 | ||
253 | static int irqdma_allocated; | |
254 | ||
1da177e4 LT |
255 | #include <linux/blkdev.h> |
256 | #include <linux/blkpg.h> | |
257 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ | |
258 | #include <linux/completion.h> | |
259 | ||
260 | static struct request *current_req; | |
48c8cee6 | 261 | static void do_fd_request(struct request_queue *q); |
48821184 | 262 | static int set_next_request(void); |
1da177e4 LT |
263 | |
264 | #ifndef fd_get_dma_residue | |
265 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) | |
266 | #endif | |
267 | ||
268 | /* Dma Memory related stuff */ | |
269 | ||
270 | #ifndef fd_dma_mem_free | |
271 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) | |
272 | #endif | |
273 | ||
274 | #ifndef fd_dma_mem_alloc | |
48c8cee6 | 275 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) |
1da177e4 LT |
276 | #endif |
277 | ||
278 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) | |
279 | { | |
280 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA | |
281 | if (*addr) | |
282 | return; /* we have the memory */ | |
283 | if (can_use_virtual_dma != 2) | |
284 | return; /* no fallback allowed */ | |
b46df356 | 285 | pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
1da177e4 LT |
286 | *addr = (char *)nodma_mem_alloc(l); |
287 | #else | |
288 | return; | |
289 | #endif | |
290 | } | |
291 | ||
292 | /* End dma memory related stuff */ | |
293 | ||
294 | static unsigned long fake_change; | |
29f1c784 | 295 | static bool initialized; |
1da177e4 | 296 | |
48c8cee6 JP |
297 | #define ITYPE(x) (((x) >> 2) & 0x1f) |
298 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) | |
299 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ | |
300 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ | |
06f748c4 | 301 | /* reverse mapping from unit and fdc to drive */ |
1da177e4 | 302 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
1da177e4 | 303 | |
48c8cee6 JP |
304 | #define DP (&drive_params[current_drive]) |
305 | #define DRS (&drive_state[current_drive]) | |
306 | #define DRWE (&write_errors[current_drive]) | |
307 | #define FDCS (&fdc_state[fdc]) | |
1da177e4 | 308 | |
48c8cee6 JP |
309 | #define UDP (&drive_params[drive]) |
310 | #define UDRS (&drive_state[drive]) | |
311 | #define UDRWE (&write_errors[drive]) | |
312 | #define UFDCS (&fdc_state[FDC(drive)]) | |
1da177e4 | 313 | |
48c8cee6 JP |
314 | #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) |
315 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) | |
316 | ||
1da177e4 | 317 | /* read/write */ |
48c8cee6 JP |
318 | #define COMMAND (raw_cmd->cmd[0]) |
319 | #define DR_SELECT (raw_cmd->cmd[1]) | |
320 | #define TRACK (raw_cmd->cmd[2]) | |
321 | #define HEAD (raw_cmd->cmd[3]) | |
322 | #define SECTOR (raw_cmd->cmd[4]) | |
323 | #define SIZECODE (raw_cmd->cmd[5]) | |
324 | #define SECT_PER_TRACK (raw_cmd->cmd[6]) | |
325 | #define GAP (raw_cmd->cmd[7]) | |
326 | #define SIZECODE2 (raw_cmd->cmd[8]) | |
1da177e4 LT |
327 | #define NR_RW 9 |
328 | ||
329 | /* format */ | |
48c8cee6 JP |
330 | #define F_SIZECODE (raw_cmd->cmd[2]) |
331 | #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) | |
332 | #define F_GAP (raw_cmd->cmd[4]) | |
333 | #define F_FILL (raw_cmd->cmd[5]) | |
1da177e4 LT |
334 | #define NR_F 6 |
335 | ||
336 | /* | |
48c8cee6 JP |
337 | * Maximum disk size (in kilobytes). |
338 | * This default is used whenever the current disk size is unknown. | |
1da177e4 LT |
339 | * [Now it is rather a minimum] |
340 | */ | |
341 | #define MAX_DISK_SIZE 4 /* 3984 */ | |
342 | ||
343 | /* | |
344 | * globals used by 'result()' | |
345 | */ | |
346 | #define MAX_REPLIES 16 | |
347 | static unsigned char reply_buffer[MAX_REPLIES]; | |
891eda80 | 348 | static int inr; /* size of reply buffer, when called from interrupt */ |
48c8cee6 JP |
349 | #define ST0 (reply_buffer[0]) |
350 | #define ST1 (reply_buffer[1]) | |
351 | #define ST2 (reply_buffer[2]) | |
352 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ | |
353 | #define R_TRACK (reply_buffer[3]) | |
354 | #define R_HEAD (reply_buffer[4]) | |
355 | #define R_SECTOR (reply_buffer[5]) | |
356 | #define R_SIZECODE (reply_buffer[6]) | |
357 | ||
358 | #define SEL_DLY (2 * HZ / 100) | |
1da177e4 LT |
359 | |
360 | /* | |
361 | * this struct defines the different floppy drive types. | |
362 | */ | |
363 | static struct { | |
364 | struct floppy_drive_params params; | |
365 | const char *name; /* name printed while booting */ | |
366 | } default_drive_params[] = { | |
367 | /* NOTE: the time values in jiffies should be in msec! | |
368 | CMOS drive type | |
369 | | Maximum data rate supported by drive type | |
370 | | | Head load time, msec | |
371 | | | | Head unload time, msec (not used) | |
372 | | | | | Step rate interval, usec | |
373 | | | | | | Time needed for spinup time (jiffies) | |
374 | | | | | | | Timeout for spinning down (jiffies) | |
375 | | | | | | | | Spindown offset (where disk stops) | |
376 | | | | | | | | | Select delay | |
377 | | | | | | | | | | RPS | |
378 | | | | | | | | | | | Max number of tracks | |
379 | | | | | | | | | | | | Interrupt timeout | |
380 | | | | | | | | | | | | | Max nonintlv. sectors | |
381 | | | | | | | | | | | | | | -Max Errors- flags */ | |
382 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, | |
383 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, | |
384 | ||
385 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, | |
386 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ | |
387 | ||
388 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, | |
389 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ | |
390 | ||
391 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
392 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ | |
393 | ||
394 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, | |
395 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ | |
396 | ||
397 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
398 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ | |
399 | ||
400 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, | |
401 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ | |
402 | /* | --autodetected formats--- | | | | |
403 | * read_track | | Name printed when booting | |
404 | * | Native format | |
405 | * Frequency of disk change checks */ | |
406 | }; | |
407 | ||
408 | static struct floppy_drive_params drive_params[N_DRIVE]; | |
409 | static struct floppy_drive_struct drive_state[N_DRIVE]; | |
410 | static struct floppy_write_errors write_errors[N_DRIVE]; | |
411 | static struct timer_list motor_off_timer[N_DRIVE]; | |
412 | static struct gendisk *disks[N_DRIVE]; | |
413 | static struct block_device *opened_bdev[N_DRIVE]; | |
b1c82b5c | 414 | static DEFINE_MUTEX(open_lock); |
1da177e4 | 415 | static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
48821184 | 416 | static int fdc_queue; |
1da177e4 LT |
417 | |
418 | /* | |
419 | * This struct defines the different floppy types. | |
420 | * | |
421 | * Bit 0 of 'stretch' tells if the tracks need to be doubled for some | |
422 | * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' | |
423 | * tells if the disk is in Commodore 1581 format, which means side 0 sectors | |
424 | * are located on side 1 of the disk but with a side 0 ID, and vice-versa. | |
425 | * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the | |
426 | * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical | |
427 | * side 0 is on physical side 0 (but with the misnamed sector IDs). | |
428 | * 'stretch' should probably be renamed to something more general, like | |
9e49184c KW |
429 | * 'options'. |
430 | * | |
431 | * Bits 2 through 9 of 'stretch' tell the number of the first sector. | |
432 | * The LSB (bit 2) is flipped. For most disks, the first sector | |
433 | * is 1 (represented by 0x00<<2). For some CP/M and music sampler | |
434 | * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). | |
435 | * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). | |
436 | * | |
437 | * Other parameters should be self-explanatory (see also setfdprm(8)). | |
1da177e4 LT |
438 | */ |
439 | /* | |
440 | Size | |
441 | | Sectors per track | |
442 | | | Head | |
443 | | | | Tracks | |
444 | | | | | Stretch | |
445 | | | | | | Gap 1 size | |
446 | | | | | | | Data rate, | 0x40 for perp | |
447 | | | | | | | | Spec1 (stepping rate, head unload | |
448 | | | | | | | | | /fmt gap (gap2) */ | |
449 | static struct floppy_struct floppy_type[32] = { | |
450 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ | |
451 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ | |
452 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ | |
453 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ | |
454 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ | |
455 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ | |
456 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ | |
457 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ | |
458 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ | |
459 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ | |
460 | ||
461 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ | |
462 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ | |
463 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ | |
464 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ | |
465 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ | |
466 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ | |
467 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ | |
468 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ | |
469 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ | |
470 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ | |
471 | ||
472 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ | |
473 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ | |
474 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ | |
475 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ | |
476 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ | |
477 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ | |
478 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ | |
479 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ | |
480 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ | |
1da177e4 | 481 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
06f748c4 | 482 | |
1da177e4 LT |
483 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
484 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ | |
485 | }; | |
486 | ||
1da177e4 LT |
487 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
488 | ||
489 | /* Auto-detection: Disk type used until the next media change occurs. */ | |
490 | static struct floppy_struct *current_type[N_DRIVE]; | |
491 | ||
492 | /* | |
493 | * User-provided type information. current_type points to | |
494 | * the respective entry of this array. | |
495 | */ | |
496 | static struct floppy_struct user_params[N_DRIVE]; | |
497 | ||
498 | static sector_t floppy_sizes[256]; | |
499 | ||
94fd0db7 HR |
500 | static char floppy_device_name[] = "floppy"; |
501 | ||
1da177e4 LT |
502 | /* |
503 | * The driver is trying to determine the correct media format | |
504 | * while probing is set. rw_interrupt() clears it after a | |
505 | * successful access. | |
506 | */ | |
507 | static int probing; | |
508 | ||
509 | /* Synchronization of FDC access. */ | |
48c8cee6 JP |
510 | #define FD_COMMAND_NONE -1 |
511 | #define FD_COMMAND_ERROR 2 | |
512 | #define FD_COMMAND_OKAY 3 | |
1da177e4 LT |
513 | |
514 | static volatile int command_status = FD_COMMAND_NONE; | |
515 | static unsigned long fdc_busy; | |
516 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); | |
517 | static DECLARE_WAIT_QUEUE_HEAD(command_done); | |
518 | ||
1da177e4 LT |
519 | /* Errors during formatting are counted here. */ |
520 | static int format_errors; | |
521 | ||
522 | /* Format request descriptor. */ | |
523 | static struct format_descr format_req; | |
524 | ||
525 | /* | |
526 | * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps | |
527 | * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), | |
528 | * H is head unload time (1=16ms, 2=32ms, etc) | |
529 | */ | |
530 | ||
531 | /* | |
532 | * Track buffer | |
533 | * Because these are written to by the DMA controller, they must | |
534 | * not contain a 64k byte boundary crossing, or data will be | |
535 | * corrupted/lost. | |
536 | */ | |
537 | static char *floppy_track_buffer; | |
538 | static int max_buffer_sectors; | |
539 | ||
540 | static int *errors; | |
06f748c4 | 541 | typedef void (*done_f)(int); |
3b06c21e | 542 | static const struct cont_t { |
48c8cee6 JP |
543 | void (*interrupt)(void); |
544 | /* this is called after the interrupt of the | |
545 | * main command */ | |
06f748c4 JJ |
546 | void (*redo)(void); /* this is called to retry the operation */ |
547 | void (*error)(void); /* this is called to tally an error */ | |
1da177e4 LT |
548 | done_f done; /* this is called to say if the operation has |
549 | * succeeded/failed */ | |
550 | } *cont; | |
551 | ||
552 | static void floppy_ready(void); | |
553 | static void floppy_start(void); | |
554 | static void process_fd_request(void); | |
555 | static void recalibrate_floppy(void); | |
556 | static void floppy_shutdown(unsigned long); | |
557 | ||
5a74db06 PDM |
558 | static int floppy_request_regions(int); |
559 | static void floppy_release_regions(int); | |
1da177e4 LT |
560 | static int floppy_grab_irq_and_dma(void); |
561 | static void floppy_release_irq_and_dma(void); | |
562 | ||
563 | /* | |
564 | * The "reset" variable should be tested whenever an interrupt is scheduled, | |
565 | * after the commands have been sent. This is to ensure that the driver doesn't | |
566 | * get wedged when the interrupt doesn't come because of a failed command. | |
567 | * reset doesn't need to be tested before sending commands, because | |
568 | * output_byte is automatically disabled when reset is set. | |
569 | */ | |
1da177e4 LT |
570 | static void reset_fdc(void); |
571 | ||
572 | /* | |
573 | * These are global variables, as that's the easiest way to give | |
574 | * information to interrupts. They are the data used for the current | |
575 | * request. | |
576 | */ | |
48c8cee6 JP |
577 | #define NO_TRACK -1 |
578 | #define NEED_1_RECAL -2 | |
579 | #define NEED_2_RECAL -3 | |
1da177e4 | 580 | |
575cfc67 | 581 | static atomic_t usage_count = ATOMIC_INIT(0); |
1da177e4 LT |
582 | |
583 | /* buffer related variables */ | |
584 | static int buffer_track = -1; | |
585 | static int buffer_drive = -1; | |
586 | static int buffer_min = -1; | |
587 | static int buffer_max = -1; | |
588 | ||
589 | /* fdc related variables, should end up in a struct */ | |
590 | static struct floppy_fdc_state fdc_state[N_FDC]; | |
591 | static int fdc; /* current fdc */ | |
592 | ||
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 | ||
600 | #ifndef fd_eject | |
601 | static inline int fd_eject(int drive) | |
602 | { | |
603 | return -EINVAL; | |
604 | } | |
605 | #endif | |
606 | ||
607 | /* | |
608 | * Debugging | |
609 | * ========= | |
610 | */ | |
611 | #ifdef DEBUGT | |
612 | static long unsigned debugtimer; | |
613 | ||
614 | static inline void set_debugt(void) | |
615 | { | |
616 | debugtimer = jiffies; | |
617 | } | |
618 | ||
ded2863d | 619 | static inline void debugt(const char *func, const char *msg) |
1da177e4 LT |
620 | { |
621 | if (DP->flags & DEBUGT) | |
ded2863d | 622 | pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); |
1da177e4 LT |
623 | } |
624 | #else | |
625 | static inline void set_debugt(void) { } | |
ded2863d | 626 | static inline void debugt(const char *func, const char *msg) { } |
1da177e4 LT |
627 | #endif /* DEBUGT */ |
628 | ||
a0a52d67 | 629 | typedef void (*timeout_fn)(unsigned long); |
8d06afab | 630 | static DEFINE_TIMER(fd_timeout, floppy_shutdown, 0, 0); |
1da177e4 LT |
631 | |
632 | static const char *timeout_message; | |
633 | ||
275176bc | 634 | static void is_alive(const char *func, const char *message) |
1da177e4 LT |
635 | { |
636 | /* this routine checks whether the floppy driver is "alive" */ | |
c529730a JP |
637 | if (test_bit(0, &fdc_busy) && command_status < 2 && |
638 | !timer_pending(&fd_timeout)) { | |
275176bc | 639 | DPRINT("%s: timeout handler died. %s\n", func, message); |
1da177e4 LT |
640 | } |
641 | } | |
1da177e4 | 642 | |
48c8cee6 | 643 | static void (*do_floppy)(void) = NULL; |
1da177e4 | 644 | |
1da177e4 LT |
645 | #define OLOGSIZE 20 |
646 | ||
48c8cee6 | 647 | static void (*lasthandler)(void); |
1da177e4 LT |
648 | static unsigned long interruptjiffies; |
649 | static unsigned long resultjiffies; | |
650 | static int resultsize; | |
651 | static unsigned long lastredo; | |
652 | ||
653 | static struct output_log { | |
654 | unsigned char data; | |
655 | unsigned char status; | |
656 | unsigned long jiffies; | |
657 | } output_log[OLOGSIZE]; | |
658 | ||
659 | static int output_log_pos; | |
1da177e4 LT |
660 | |
661 | #define current_reqD -1 | |
662 | #define MAXTIMEOUT -2 | |
663 | ||
73507e6c | 664 | static void __reschedule_timeout(int drive, const char *message) |
1da177e4 LT |
665 | { |
666 | if (drive == current_reqD) | |
667 | drive = current_drive; | |
668 | del_timer(&fd_timeout); | |
4acb3e2f | 669 | if (drive < 0 || drive >= N_DRIVE) { |
1da177e4 LT |
670 | fd_timeout.expires = jiffies + 20UL * HZ; |
671 | drive = 0; | |
672 | } else | |
673 | fd_timeout.expires = jiffies + UDP->timeout; | |
674 | add_timer(&fd_timeout); | |
a81ee544 | 675 | if (UDP->flags & FD_DEBUG) |
73507e6c | 676 | DPRINT("reschedule timeout %s\n", message); |
1da177e4 LT |
677 | timeout_message = message; |
678 | } | |
679 | ||
73507e6c | 680 | static void reschedule_timeout(int drive, const char *message) |
1da177e4 LT |
681 | { |
682 | unsigned long flags; | |
683 | ||
684 | spin_lock_irqsave(&floppy_lock, flags); | |
73507e6c | 685 | __reschedule_timeout(drive, message); |
1da177e4 LT |
686 | spin_unlock_irqrestore(&floppy_lock, flags); |
687 | } | |
688 | ||
48c8cee6 JP |
689 | #define INFBOUND(a, b) (a) = max_t(int, a, b) |
690 | #define SUPBOUND(a, b) (a) = min_t(int, a, b) | |
1da177e4 LT |
691 | |
692 | /* | |
693 | * Bottom half floppy driver. | |
694 | * ========================== | |
695 | * | |
696 | * This part of the file contains the code talking directly to the hardware, | |
697 | * and also the main service loop (seek-configure-spinup-command) | |
698 | */ | |
699 | ||
700 | /* | |
701 | * disk change. | |
702 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, | |
703 | * and the last_checked date. | |
704 | * | |
705 | * last_checked is the date of the last check which showed 'no disk change' | |
706 | * FD_DISK_CHANGE is set under two conditions: | |
707 | * 1. The floppy has been changed after some i/o to that floppy already | |
708 | * took place. | |
709 | * 2. No floppy disk is in the drive. This is done in order to ensure that | |
710 | * requests are quickly flushed in case there is no disk in the drive. It | |
711 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in | |
712 | * the drive. | |
713 | * | |
714 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. | |
715 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on | |
716 | * each seek. If a disk is present, the disk change line should also be | |
717 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk | |
718 | * change line is set, this means either that no disk is in the drive, or | |
719 | * that it has been removed since the last seek. | |
720 | * | |
721 | * This means that we really have a third possibility too: | |
722 | * The floppy has been changed after the last seek. | |
723 | */ | |
724 | ||
725 | static int disk_change(int drive) | |
726 | { | |
727 | int fdc = FDC(drive); | |
06f748c4 | 728 | |
50297cbf | 729 | if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) |
1da177e4 LT |
730 | DPRINT("WARNING disk change called early\n"); |
731 | if (!(FDCS->dor & (0x10 << UNIT(drive))) || | |
732 | (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { | |
733 | DPRINT("probing disk change on unselected drive\n"); | |
734 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), | |
735 | (unsigned int)FDCS->dor); | |
736 | } | |
1da177e4 | 737 | |
87f530d8 JP |
738 | debug_dcl(UDP->flags, |
739 | "checking disk change line for drive %d\n", drive); | |
740 | debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); | |
741 | debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); | |
742 | debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); | |
743 | ||
1da177e4 | 744 | if (UDP->flags & FD_BROKEN_DCL) |
e0298536 | 745 | return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
1da177e4 | 746 | if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { |
e0298536 JP |
747 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
748 | /* verify write protection */ | |
749 | ||
750 | if (UDRS->maxblock) /* mark it changed */ | |
751 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); | |
1da177e4 LT |
752 | |
753 | /* invalidate its geometry */ | |
754 | if (UDRS->keep_data >= 0) { | |
755 | if ((UDP->flags & FTD_MSG) && | |
756 | current_type[drive] != NULL) | |
891eda80 | 757 | DPRINT("Disk type is undefined after disk change\n"); |
1da177e4 LT |
758 | current_type[drive] = NULL; |
759 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; | |
760 | } | |
761 | ||
1da177e4 LT |
762 | return 1; |
763 | } else { | |
764 | UDRS->last_checked = jiffies; | |
e0298536 | 765 | clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
1da177e4 LT |
766 | } |
767 | return 0; | |
768 | } | |
769 | ||
770 | static inline int is_selected(int dor, int unit) | |
771 | { | |
772 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); | |
773 | } | |
774 | ||
57584c5a JP |
775 | static bool is_ready_state(int status) |
776 | { | |
777 | int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); | |
778 | return state == STATUS_READY; | |
779 | } | |
780 | ||
1da177e4 LT |
781 | static int set_dor(int fdc, char mask, char data) |
782 | { | |
fdc1ca8a JJ |
783 | unsigned char unit; |
784 | unsigned char drive; | |
785 | unsigned char newdor; | |
786 | unsigned char olddor; | |
1da177e4 LT |
787 | |
788 | if (FDCS->address == -1) | |
789 | return -1; | |
790 | ||
791 | olddor = FDCS->dor; | |
792 | newdor = (olddor & mask) | data; | |
793 | if (newdor != olddor) { | |
794 | unit = olddor & 0x3; | |
795 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { | |
796 | drive = REVDRIVE(fdc, unit); | |
87f530d8 JP |
797 | debug_dcl(UDP->flags, |
798 | "calling disk change from set_dor\n"); | |
1da177e4 LT |
799 | disk_change(drive); |
800 | } | |
801 | FDCS->dor = newdor; | |
802 | fd_outb(newdor, FD_DOR); | |
803 | ||
804 | unit = newdor & 0x3; | |
805 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { | |
806 | drive = REVDRIVE(fdc, unit); | |
807 | UDRS->select_date = jiffies; | |
808 | } | |
809 | } | |
1da177e4 LT |
810 | return olddor; |
811 | } | |
812 | ||
813 | static void twaddle(void) | |
814 | { | |
815 | if (DP->select_delay) | |
816 | return; | |
817 | fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); | |
818 | fd_outb(FDCS->dor, FD_DOR); | |
819 | DRS->select_date = jiffies; | |
820 | } | |
821 | ||
57584c5a JP |
822 | /* |
823 | * Reset all driver information about the current fdc. | |
824 | * This is needed after a reset, and after a raw command. | |
825 | */ | |
1da177e4 LT |
826 | static void reset_fdc_info(int mode) |
827 | { | |
828 | int drive; | |
829 | ||
830 | FDCS->spec1 = FDCS->spec2 = -1; | |
831 | FDCS->need_configure = 1; | |
832 | FDCS->perp_mode = 1; | |
833 | FDCS->rawcmd = 0; | |
834 | for (drive = 0; drive < N_DRIVE; drive++) | |
835 | if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) | |
836 | UDRS->track = NEED_2_RECAL; | |
837 | } | |
838 | ||
839 | /* selects the fdc and drive, and enables the fdc's input/dma. */ | |
840 | static void set_fdc(int drive) | |
841 | { | |
842 | if (drive >= 0 && drive < N_DRIVE) { | |
843 | fdc = FDC(drive); | |
844 | current_drive = drive; | |
845 | } | |
846 | if (fdc != 1 && fdc != 0) { | |
b46df356 | 847 | pr_info("bad fdc value\n"); |
1da177e4 LT |
848 | return; |
849 | } | |
850 | set_dor(fdc, ~0, 8); | |
851 | #if N_FDC > 1 | |
852 | set_dor(1 - fdc, ~8, 0); | |
853 | #endif | |
854 | if (FDCS->rawcmd == 2) | |
855 | reset_fdc_info(1); | |
856 | if (fd_inb(FD_STATUS) != STATUS_READY) | |
857 | FDCS->reset = 1; | |
858 | } | |
859 | ||
860 | /* locks the driver */ | |
b862f26f | 861 | static int lock_fdc(int drive, bool interruptible) |
1da177e4 | 862 | { |
b862f26f SH |
863 | if (WARN(atomic_read(&usage_count) == 0, |
864 | "Trying to lock fdc while usage count=0\n")) | |
1da177e4 | 865 | return -1; |
1da177e4 | 866 | |
b862f26f SH |
867 | if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) |
868 | return -EINTR; | |
1da177e4 | 869 | |
1da177e4 LT |
870 | command_status = FD_COMMAND_NONE; |
871 | ||
73507e6c | 872 | __reschedule_timeout(drive, "lock fdc"); |
1da177e4 LT |
873 | set_fdc(drive); |
874 | return 0; | |
875 | } | |
876 | ||
1da177e4 | 877 | /* unlocks the driver */ |
be7a12bb | 878 | static void unlock_fdc(void) |
1da177e4 LT |
879 | { |
880 | unsigned long flags; | |
881 | ||
882 | raw_cmd = NULL; | |
883 | if (!test_bit(0, &fdc_busy)) | |
884 | DPRINT("FDC access conflict!\n"); | |
885 | ||
886 | if (do_floppy) | |
1ebddd85 | 887 | DPRINT("device interrupt still active at FDC release: %pf!\n", |
1da177e4 LT |
888 | do_floppy); |
889 | command_status = FD_COMMAND_NONE; | |
890 | spin_lock_irqsave(&floppy_lock, flags); | |
891 | del_timer(&fd_timeout); | |
892 | cont = NULL; | |
893 | clear_bit(0, &fdc_busy); | |
48821184 JA |
894 | if (current_req || set_next_request()) |
895 | do_fd_request(current_req->q); | |
1da177e4 | 896 | spin_unlock_irqrestore(&floppy_lock, flags); |
1da177e4 LT |
897 | wake_up(&fdc_wait); |
898 | } | |
899 | ||
900 | /* switches the motor off after a given timeout */ | |
901 | static void motor_off_callback(unsigned long nr) | |
902 | { | |
903 | unsigned char mask = ~(0x10 << UNIT(nr)); | |
904 | ||
905 | set_dor(FDC(nr), mask, 0); | |
906 | } | |
907 | ||
908 | /* schedules motor off */ | |
909 | static void floppy_off(unsigned int drive) | |
910 | { | |
911 | unsigned long volatile delta; | |
fdc1ca8a | 912 | int fdc = FDC(drive); |
1da177e4 LT |
913 | |
914 | if (!(FDCS->dor & (0x10 << UNIT(drive)))) | |
915 | return; | |
916 | ||
917 | del_timer(motor_off_timer + drive); | |
918 | ||
919 | /* make spindle stop in a position which minimizes spinup time | |
920 | * next time */ | |
921 | if (UDP->rps) { | |
922 | delta = jiffies - UDRS->first_read_date + HZ - | |
923 | UDP->spindown_offset; | |
924 | delta = ((delta * UDP->rps) % HZ) / UDP->rps; | |
925 | motor_off_timer[drive].expires = | |
926 | jiffies + UDP->spindown - delta; | |
927 | } | |
928 | add_timer(motor_off_timer + drive); | |
929 | } | |
930 | ||
931 | /* | |
932 | * cycle through all N_DRIVE floppy drives, for disk change testing. | |
933 | * stopping at current drive. This is done before any long operation, to | |
934 | * be sure to have up to date disk change information. | |
935 | */ | |
936 | static void scandrives(void) | |
937 | { | |
06f748c4 JJ |
938 | int i; |
939 | int drive; | |
940 | int saved_drive; | |
1da177e4 LT |
941 | |
942 | if (DP->select_delay) | |
943 | return; | |
944 | ||
945 | saved_drive = current_drive; | |
946 | for (i = 0; i < N_DRIVE; i++) { | |
947 | drive = (saved_drive + i + 1) % N_DRIVE; | |
948 | if (UDRS->fd_ref == 0 || UDP->select_delay != 0) | |
949 | continue; /* skip closed drives */ | |
950 | set_fdc(drive); | |
951 | if (!(set_dor(fdc, ~3, UNIT(drive) | (0x10 << UNIT(drive))) & | |
952 | (0x10 << UNIT(drive)))) | |
953 | /* switch the motor off again, if it was off to | |
954 | * begin with */ | |
955 | set_dor(fdc, ~(0x10 << UNIT(drive)), 0); | |
956 | } | |
957 | set_fdc(saved_drive); | |
958 | } | |
959 | ||
960 | static void empty(void) | |
961 | { | |
962 | } | |
963 | ||
65f27f38 | 964 | static DECLARE_WORK(floppy_work, NULL); |
1da177e4 | 965 | |
48c8cee6 | 966 | static void schedule_bh(void (*handler)(void)) |
1da177e4 | 967 | { |
65f27f38 | 968 | PREPARE_WORK(&floppy_work, (work_func_t)handler); |
1da177e4 LT |
969 | schedule_work(&floppy_work); |
970 | } | |
971 | ||
8d06afab | 972 | static DEFINE_TIMER(fd_timer, NULL, 0, 0); |
1da177e4 LT |
973 | |
974 | static void cancel_activity(void) | |
975 | { | |
976 | unsigned long flags; | |
977 | ||
978 | spin_lock_irqsave(&floppy_lock, flags); | |
979 | do_floppy = NULL; | |
65f27f38 | 980 | PREPARE_WORK(&floppy_work, (work_func_t)empty); |
1da177e4 LT |
981 | del_timer(&fd_timer); |
982 | spin_unlock_irqrestore(&floppy_lock, flags); | |
983 | } | |
984 | ||
985 | /* this function makes sure that the disk stays in the drive during the | |
986 | * transfer */ | |
987 | static void fd_watchdog(void) | |
988 | { | |
87f530d8 | 989 | debug_dcl(DP->flags, "calling disk change from watchdog\n"); |
1da177e4 LT |
990 | |
991 | if (disk_change(current_drive)) { | |
992 | DPRINT("disk removed during i/o\n"); | |
993 | cancel_activity(); | |
994 | cont->done(0); | |
995 | reset_fdc(); | |
996 | } else { | |
997 | del_timer(&fd_timer); | |
a0a52d67 | 998 | fd_timer.function = (timeout_fn)fd_watchdog; |
1da177e4 LT |
999 | fd_timer.expires = jiffies + HZ / 10; |
1000 | add_timer(&fd_timer); | |
1001 | } | |
1002 | } | |
1003 | ||
1004 | static void main_command_interrupt(void) | |
1005 | { | |
1006 | del_timer(&fd_timer); | |
1007 | cont->interrupt(); | |
1008 | } | |
1009 | ||
1010 | /* waits for a delay (spinup or select) to pass */ | |
1011 | static int fd_wait_for_completion(unsigned long delay, timeout_fn function) | |
1012 | { | |
1013 | if (FDCS->reset) { | |
1014 | reset_fdc(); /* do the reset during sleep to win time | |
1015 | * if we don't need to sleep, it's a good | |
1016 | * occasion anyways */ | |
1017 | return 1; | |
1018 | } | |
1019 | ||
50297cbf | 1020 | if (time_before(jiffies, delay)) { |
1da177e4 LT |
1021 | del_timer(&fd_timer); |
1022 | fd_timer.function = function; | |
1023 | fd_timer.expires = delay; | |
1024 | add_timer(&fd_timer); | |
1025 | return 1; | |
1026 | } | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static DEFINE_SPINLOCK(floppy_hlt_lock); | |
1031 | static int hlt_disabled; | |
1032 | static void floppy_disable_hlt(void) | |
1033 | { | |
1034 | unsigned long flags; | |
1035 | ||
1036 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1037 | if (!hlt_disabled) { | |
1038 | hlt_disabled = 1; | |
1039 | #ifdef HAVE_DISABLE_HLT | |
1040 | disable_hlt(); | |
1041 | #endif | |
1042 | } | |
1043 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1044 | } | |
1045 | ||
1046 | static void floppy_enable_hlt(void) | |
1047 | { | |
1048 | unsigned long flags; | |
1049 | ||
1050 | spin_lock_irqsave(&floppy_hlt_lock, flags); | |
1051 | if (hlt_disabled) { | |
1052 | hlt_disabled = 0; | |
1053 | #ifdef HAVE_DISABLE_HLT | |
1054 | enable_hlt(); | |
1055 | #endif | |
1056 | } | |
1057 | spin_unlock_irqrestore(&floppy_hlt_lock, flags); | |
1058 | } | |
1059 | ||
1060 | static void setup_DMA(void) | |
1061 | { | |
1062 | unsigned long f; | |
1063 | ||
1da177e4 LT |
1064 | if (raw_cmd->length == 0) { |
1065 | int i; | |
1066 | ||
b46df356 | 1067 | pr_info("zero dma transfer size:"); |
1da177e4 | 1068 | for (i = 0; i < raw_cmd->cmd_count; i++) |
b46df356 JP |
1069 | pr_cont("%x,", raw_cmd->cmd[i]); |
1070 | pr_cont("\n"); | |
1da177e4 LT |
1071 | cont->done(0); |
1072 | FDCS->reset = 1; | |
1073 | return; | |
1074 | } | |
1075 | if (((unsigned long)raw_cmd->kernel_data) % 512) { | |
b46df356 | 1076 | pr_info("non aligned address: %p\n", raw_cmd->kernel_data); |
1da177e4 LT |
1077 | cont->done(0); |
1078 | FDCS->reset = 1; | |
1079 | return; | |
1080 | } | |
1da177e4 LT |
1081 | f = claim_dma_lock(); |
1082 | fd_disable_dma(); | |
1083 | #ifdef fd_dma_setup | |
1084 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, | |
1085 | (raw_cmd->flags & FD_RAW_READ) ? | |
1086 | DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { | |
1087 | release_dma_lock(f); | |
1088 | cont->done(0); | |
1089 | FDCS->reset = 1; | |
1090 | return; | |
1091 | } | |
1092 | release_dma_lock(f); | |
1093 | #else | |
1094 | fd_clear_dma_ff(); | |
1095 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); | |
1096 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? | |
1097 | DMA_MODE_READ : DMA_MODE_WRITE); | |
1098 | fd_set_dma_addr(raw_cmd->kernel_data); | |
1099 | fd_set_dma_count(raw_cmd->length); | |
1100 | virtual_dma_port = FDCS->address; | |
1101 | fd_enable_dma(); | |
1102 | release_dma_lock(f); | |
1103 | #endif | |
1104 | floppy_disable_hlt(); | |
1105 | } | |
1106 | ||
1107 | static void show_floppy(void); | |
1108 | ||
1109 | /* waits until the fdc becomes ready */ | |
1110 | static int wait_til_ready(void) | |
1111 | { | |
06f748c4 JJ |
1112 | int status; |
1113 | int counter; | |
1114 | ||
1da177e4 LT |
1115 | if (FDCS->reset) |
1116 | return -1; | |
1117 | for (counter = 0; counter < 10000; counter++) { | |
1118 | status = fd_inb(FD_STATUS); | |
1119 | if (status & STATUS_READY) | |
1120 | return status; | |
1121 | } | |
29f1c784 | 1122 | if (initialized) { |
1da177e4 LT |
1123 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); |
1124 | show_floppy(); | |
1125 | } | |
1126 | FDCS->reset = 1; | |
1127 | return -1; | |
1128 | } | |
1129 | ||
1130 | /* sends a command byte to the fdc */ | |
1131 | static int output_byte(char byte) | |
1132 | { | |
d7b2b2ec | 1133 | int status = wait_til_ready(); |
1da177e4 | 1134 | |
d7b2b2ec | 1135 | if (status < 0) |
1da177e4 | 1136 | return -1; |
57584c5a JP |
1137 | |
1138 | if (is_ready_state(status)) { | |
1da177e4 | 1139 | fd_outb(byte, FD_DATA); |
1da177e4 LT |
1140 | output_log[output_log_pos].data = byte; |
1141 | output_log[output_log_pos].status = status; | |
1142 | output_log[output_log_pos].jiffies = jiffies; | |
1143 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; | |
1da177e4 LT |
1144 | return 0; |
1145 | } | |
1146 | FDCS->reset = 1; | |
29f1c784 | 1147 | if (initialized) { |
1da177e4 LT |
1148 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", |
1149 | byte, fdc, status); | |
1150 | show_floppy(); | |
1151 | } | |
1152 | return -1; | |
1153 | } | |
1154 | ||
1da177e4 LT |
1155 | /* gets the response from the fdc */ |
1156 | static int result(void) | |
1157 | { | |
06f748c4 JJ |
1158 | int i; |
1159 | int status = 0; | |
1da177e4 LT |
1160 | |
1161 | for (i = 0; i < MAX_REPLIES; i++) { | |
d7b2b2ec JP |
1162 | status = wait_til_ready(); |
1163 | if (status < 0) | |
1da177e4 LT |
1164 | break; |
1165 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; | |
1166 | if ((status & ~STATUS_BUSY) == STATUS_READY) { | |
1da177e4 LT |
1167 | resultjiffies = jiffies; |
1168 | resultsize = i; | |
1da177e4 LT |
1169 | return i; |
1170 | } | |
1171 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) | |
1172 | reply_buffer[i] = fd_inb(FD_DATA); | |
1173 | else | |
1174 | break; | |
1175 | } | |
29f1c784 JP |
1176 | if (initialized) { |
1177 | DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", | |
1178 | fdc, status, i); | |
1da177e4 LT |
1179 | show_floppy(); |
1180 | } | |
1181 | FDCS->reset = 1; | |
1182 | return -1; | |
1183 | } | |
1184 | ||
1185 | #define MORE_OUTPUT -2 | |
1186 | /* does the fdc need more output? */ | |
1187 | static int need_more_output(void) | |
1188 | { | |
d7b2b2ec | 1189 | int status = wait_til_ready(); |
06f748c4 | 1190 | |
d7b2b2ec | 1191 | if (status < 0) |
1da177e4 | 1192 | return -1; |
57584c5a JP |
1193 | |
1194 | if (is_ready_state(status)) | |
1da177e4 | 1195 | return MORE_OUTPUT; |
57584c5a | 1196 | |
1da177e4 LT |
1197 | return result(); |
1198 | } | |
1199 | ||
1200 | /* Set perpendicular mode as required, based on data rate, if supported. | |
1201 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. | |
1202 | */ | |
be7a12bb | 1203 | static void perpendicular_mode(void) |
1da177e4 LT |
1204 | { |
1205 | unsigned char perp_mode; | |
1206 | ||
1207 | if (raw_cmd->rate & 0x40) { | |
1208 | switch (raw_cmd->rate & 3) { | |
1209 | case 0: | |
1210 | perp_mode = 2; | |
1211 | break; | |
1212 | case 3: | |
1213 | perp_mode = 3; | |
1214 | break; | |
1215 | default: | |
1216 | DPRINT("Invalid data rate for perpendicular mode!\n"); | |
1217 | cont->done(0); | |
bb57f0c6 JP |
1218 | FDCS->reset = 1; |
1219 | /* | |
1220 | * convenient way to return to | |
1221 | * redo without too much hassle | |
1222 | * (deep stack et al.) | |
1223 | */ | |
1da177e4 LT |
1224 | return; |
1225 | } | |
1226 | } else | |
1227 | perp_mode = 0; | |
1228 | ||
1229 | if (FDCS->perp_mode == perp_mode) | |
1230 | return; | |
1231 | if (FDCS->version >= FDC_82077_ORIG) { | |
1232 | output_byte(FD_PERPENDICULAR); | |
1233 | output_byte(perp_mode); | |
1234 | FDCS->perp_mode = perp_mode; | |
1235 | } else if (perp_mode) { | |
1236 | DPRINT("perpendicular mode not supported by this FDC.\n"); | |
1237 | } | |
1238 | } /* perpendicular_mode */ | |
1239 | ||
1240 | static int fifo_depth = 0xa; | |
1241 | static int no_fifo; | |
1242 | ||
1243 | static int fdc_configure(void) | |
1244 | { | |
1245 | /* Turn on FIFO */ | |
1246 | output_byte(FD_CONFIGURE); | |
1247 | if (need_more_output() != MORE_OUTPUT) | |
1248 | return 0; | |
1249 | output_byte(0); | |
1250 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); | |
1251 | output_byte(0); /* pre-compensation from track | |
1252 | 0 upwards */ | |
1253 | return 1; | |
1254 | } | |
1255 | ||
1256 | #define NOMINAL_DTR 500 | |
1257 | ||
1258 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, | |
1259 | * head load time, and DMA disable flag to values needed by floppy. | |
1260 | * | |
1261 | * The value "dtr" is the data transfer rate in Kbps. It is needed | |
1262 | * to account for the data rate-based scaling done by the 82072 and 82077 | |
1263 | * FDC types. This parameter is ignored for other types of FDCs (i.e. | |
1264 | * 8272a). | |
1265 | * | |
1266 | * Note that changing the data transfer rate has a (probably deleterious) | |
1267 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so | |
1268 | * fdc_specify is called again after each data transfer rate | |
1269 | * change. | |
1270 | * | |
1271 | * srt: 1000 to 16000 in microseconds | |
1272 | * hut: 16 to 240 milliseconds | |
1273 | * hlt: 2 to 254 milliseconds | |
1274 | * | |
1275 | * These values are rounded up to the next highest available delay time. | |
1276 | */ | |
1277 | static void fdc_specify(void) | |
1278 | { | |
06f748c4 JJ |
1279 | unsigned char spec1; |
1280 | unsigned char spec2; | |
1281 | unsigned long srt; | |
1282 | unsigned long hlt; | |
1283 | unsigned long hut; | |
1da177e4 LT |
1284 | unsigned long dtr = NOMINAL_DTR; |
1285 | unsigned long scale_dtr = NOMINAL_DTR; | |
1286 | int hlt_max_code = 0x7f; | |
1287 | int hut_max_code = 0xf; | |
1288 | ||
1289 | if (FDCS->need_configure && FDCS->version >= FDC_82072A) { | |
1290 | fdc_configure(); | |
1291 | FDCS->need_configure = 0; | |
1da177e4 LT |
1292 | } |
1293 | ||
1294 | switch (raw_cmd->rate & 0x03) { | |
1295 | case 3: | |
1296 | dtr = 1000; | |
1297 | break; | |
1298 | case 1: | |
1299 | dtr = 300; | |
1300 | if (FDCS->version >= FDC_82078) { | |
1301 | /* chose the default rate table, not the one | |
1302 | * where 1 = 2 Mbps */ | |
1303 | output_byte(FD_DRIVESPEC); | |
1304 | if (need_more_output() == MORE_OUTPUT) { | |
1305 | output_byte(UNIT(current_drive)); | |
1306 | output_byte(0xc0); | |
1307 | } | |
1308 | } | |
1309 | break; | |
1310 | case 2: | |
1311 | dtr = 250; | |
1312 | break; | |
1313 | } | |
1314 | ||
1315 | if (FDCS->version >= FDC_82072) { | |
1316 | scale_dtr = dtr; | |
1317 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1318 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ | |
1319 | } | |
1320 | ||
1321 | /* Convert step rate from microseconds to milliseconds and 4 bits */ | |
061837bc | 1322 | srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); |
a81ee544 | 1323 | if (slow_floppy) |
1da177e4 | 1324 | srt = srt / 4; |
a81ee544 | 1325 | |
1da177e4 LT |
1326 | SUPBOUND(srt, 0xf); |
1327 | INFBOUND(srt, 0); | |
1328 | ||
061837bc | 1329 | hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); |
1da177e4 LT |
1330 | if (hlt < 0x01) |
1331 | hlt = 0x01; | |
1332 | else if (hlt > 0x7f) | |
1333 | hlt = hlt_max_code; | |
1334 | ||
061837bc | 1335 | hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); |
1da177e4 LT |
1336 | if (hut < 0x1) |
1337 | hut = 0x1; | |
1338 | else if (hut > 0xf) | |
1339 | hut = hut_max_code; | |
1340 | ||
1341 | spec1 = (srt << 4) | hut; | |
1342 | spec2 = (hlt << 1) | (use_virtual_dma & 1); | |
1343 | ||
1344 | /* If these parameters did not change, just return with success */ | |
1345 | if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { | |
1346 | /* Go ahead and set spec1 and spec2 */ | |
1347 | output_byte(FD_SPECIFY); | |
1348 | output_byte(FDCS->spec1 = spec1); | |
1349 | output_byte(FDCS->spec2 = spec2); | |
1350 | } | |
1351 | } /* fdc_specify */ | |
1352 | ||
1353 | /* Set the FDC's data transfer rate on behalf of the specified drive. | |
1354 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue | |
1355 | * of the specify command (i.e. using the fdc_specify function). | |
1356 | */ | |
1357 | static int fdc_dtr(void) | |
1358 | { | |
1359 | /* If data rate not already set to desired value, set it. */ | |
1360 | if ((raw_cmd->rate & 3) == FDCS->dtr) | |
1361 | return 0; | |
1362 | ||
1363 | /* Set dtr */ | |
1364 | fd_outb(raw_cmd->rate & 3, FD_DCR); | |
1365 | ||
1366 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) | |
1367 | * need a stabilization period of several milliseconds to be | |
1368 | * enforced after data rate changes before R/W operations. | |
1369 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) | |
1370 | */ | |
1371 | FDCS->dtr = raw_cmd->rate & 3; | |
d7b2b2ec JP |
1372 | return fd_wait_for_completion(jiffies + 2UL * HZ / 100, |
1373 | (timeout_fn)floppy_ready); | |
1da177e4 LT |
1374 | } /* fdc_dtr */ |
1375 | ||
1376 | static void tell_sector(void) | |
1377 | { | |
b46df356 JP |
1378 | pr_cont(": track %d, head %d, sector %d, size %d", |
1379 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); | |
1da177e4 LT |
1380 | } /* tell_sector */ |
1381 | ||
b46df356 JP |
1382 | static void print_errors(void) |
1383 | { | |
1384 | DPRINT(""); | |
1385 | if (ST0 & ST0_ECE) { | |
1386 | pr_cont("Recalibrate failed!"); | |
1387 | } else if (ST2 & ST2_CRC) { | |
1388 | pr_cont("data CRC error"); | |
1389 | tell_sector(); | |
1390 | } else if (ST1 & ST1_CRC) { | |
1391 | pr_cont("CRC error"); | |
1392 | tell_sector(); | |
1393 | } else if ((ST1 & (ST1_MAM | ST1_ND)) || | |
1394 | (ST2 & ST2_MAM)) { | |
1395 | if (!probing) { | |
1396 | pr_cont("sector not found"); | |
1397 | tell_sector(); | |
1398 | } else | |
1399 | pr_cont("probe failed..."); | |
1400 | } else if (ST2 & ST2_WC) { /* seek error */ | |
1401 | pr_cont("wrong cylinder"); | |
1402 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ | |
1403 | pr_cont("bad cylinder"); | |
1404 | } else { | |
1405 | pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", | |
1406 | ST0, ST1, ST2); | |
1407 | tell_sector(); | |
1408 | } | |
1409 | pr_cont("\n"); | |
1410 | } | |
1411 | ||
1da177e4 LT |
1412 | /* |
1413 | * OK, this error interpreting routine is called after a | |
1414 | * DMA read/write has succeeded | |
1415 | * or failed, so we check the results, and copy any buffers. | |
1416 | * hhb: Added better error reporting. | |
1417 | * ak: Made this into a separate routine. | |
1418 | */ | |
1419 | static int interpret_errors(void) | |
1420 | { | |
1421 | char bad; | |
1422 | ||
1423 | if (inr != 7) { | |
891eda80 | 1424 | DPRINT("-- FDC reply error\n"); |
1da177e4 LT |
1425 | FDCS->reset = 1; |
1426 | return 1; | |
1427 | } | |
1428 | ||
1429 | /* check IC to find cause of interrupt */ | |
1430 | switch (ST0 & ST0_INTR) { | |
1431 | case 0x40: /* error occurred during command execution */ | |
1432 | if (ST1 & ST1_EOC) | |
1433 | return 0; /* occurs with pseudo-DMA */ | |
1434 | bad = 1; | |
1435 | if (ST1 & ST1_WP) { | |
1436 | DPRINT("Drive is write protected\n"); | |
e0298536 | 1437 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1438 | cont->done(0); |
1439 | bad = 2; | |
1440 | } else if (ST1 & ST1_ND) { | |
e0298536 | 1441 | set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); |
1da177e4 LT |
1442 | } else if (ST1 & ST1_OR) { |
1443 | if (DP->flags & FTD_MSG) | |
1444 | DPRINT("Over/Underrun - retrying\n"); | |
1445 | bad = 0; | |
1446 | } else if (*errors >= DP->max_errors.reporting) { | |
b46df356 | 1447 | print_errors(); |
1da177e4 LT |
1448 | } |
1449 | if (ST2 & ST2_WC || ST2 & ST2_BC) | |
1450 | /* wrong cylinder => recal */ | |
1451 | DRS->track = NEED_2_RECAL; | |
1452 | return bad; | |
1453 | case 0x80: /* invalid command given */ | |
1454 | DPRINT("Invalid FDC command given!\n"); | |
1455 | cont->done(0); | |
1456 | return 2; | |
1457 | case 0xc0: | |
1458 | DPRINT("Abnormal termination caused by polling\n"); | |
1459 | cont->error(); | |
1460 | return 2; | |
1461 | default: /* (0) Normal command termination */ | |
1462 | return 0; | |
1463 | } | |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * This routine is called when everything should be correctly set up | |
1468 | * for the transfer (i.e. floppy motor is on, the correct floppy is | |
1469 | * selected, and the head is sitting on the right track). | |
1470 | */ | |
1471 | static void setup_rw_floppy(void) | |
1472 | { | |
06f748c4 JJ |
1473 | int i; |
1474 | int r; | |
1475 | int flags; | |
1476 | int dflags; | |
1da177e4 LT |
1477 | unsigned long ready_date; |
1478 | timeout_fn function; | |
1479 | ||
1480 | flags = raw_cmd->flags; | |
1481 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) | |
1482 | flags |= FD_RAW_INTR; | |
1483 | ||
1484 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { | |
1485 | ready_date = DRS->spinup_date + DP->spinup; | |
1486 | /* If spinup will take a long time, rerun scandrives | |
1487 | * again just before spinup completion. Beware that | |
1488 | * after scandrives, we must again wait for selection. | |
1489 | */ | |
50297cbf | 1490 | if (time_after(ready_date, jiffies + DP->select_delay)) { |
1da177e4 | 1491 | ready_date -= DP->select_delay; |
a0a52d67 | 1492 | function = (timeout_fn)floppy_start; |
1da177e4 | 1493 | } else |
a0a52d67 | 1494 | function = (timeout_fn)setup_rw_floppy; |
1da177e4 LT |
1495 | |
1496 | /* wait until the floppy is spinning fast enough */ | |
1497 | if (fd_wait_for_completion(ready_date, function)) | |
1498 | return; | |
1499 | } | |
1500 | dflags = DRS->flags; | |
1501 | ||
1502 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) | |
1503 | setup_DMA(); | |
1504 | ||
1505 | if (flags & FD_RAW_INTR) | |
1506 | do_floppy = main_command_interrupt; | |
1507 | ||
1508 | r = 0; | |
1509 | for (i = 0; i < raw_cmd->cmd_count; i++) | |
1510 | r |= output_byte(raw_cmd->cmd[i]); | |
1511 | ||
ded2863d | 1512 | debugt(__func__, "rw_command"); |
1da177e4 LT |
1513 | |
1514 | if (r) { | |
1515 | cont->error(); | |
1516 | reset_fdc(); | |
1517 | return; | |
1518 | } | |
1519 | ||
1520 | if (!(flags & FD_RAW_INTR)) { | |
1521 | inr = result(); | |
1522 | cont->interrupt(); | |
1523 | } else if (flags & FD_RAW_NEED_DISK) | |
1524 | fd_watchdog(); | |
1525 | } | |
1526 | ||
1527 | static int blind_seek; | |
1528 | ||
1529 | /* | |
1530 | * This is the routine called after every seek (or recalibrate) interrupt | |
1531 | * from the floppy controller. | |
1532 | */ | |
1533 | static void seek_interrupt(void) | |
1534 | { | |
ded2863d | 1535 | debugt(__func__, ""); |
1da177e4 LT |
1536 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { |
1537 | DPRINT("seek failed\n"); | |
1538 | DRS->track = NEED_2_RECAL; | |
1539 | cont->error(); | |
1540 | cont->redo(); | |
1541 | return; | |
1542 | } | |
1543 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { | |
87f530d8 JP |
1544 | debug_dcl(DP->flags, |
1545 | "clearing NEWCHANGE flag because of effective seek\n"); | |
1546 | debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); | |
e0298536 JP |
1547 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1548 | /* effective seek */ | |
1da177e4 LT |
1549 | DRS->select_date = jiffies; |
1550 | } | |
1551 | DRS->track = ST1; | |
1552 | floppy_ready(); | |
1553 | } | |
1554 | ||
1555 | static void check_wp(void) | |
1556 | { | |
e0298536 JP |
1557 | if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { |
1558 | /* check write protection */ | |
1da177e4 LT |
1559 | output_byte(FD_GETSTATUS); |
1560 | output_byte(UNIT(current_drive)); | |
1561 | if (result() != 1) { | |
1562 | FDCS->reset = 1; | |
1563 | return; | |
1564 | } | |
e0298536 JP |
1565 | clear_bit(FD_VERIFY_BIT, &DRS->flags); |
1566 | clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); | |
87f530d8 JP |
1567 | debug_dcl(DP->flags, |
1568 | "checking whether disk is write protected\n"); | |
1569 | debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); | |
1da177e4 | 1570 | if (!(ST3 & 0x40)) |
e0298536 | 1571 | set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 | 1572 | else |
e0298536 | 1573 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1da177e4 LT |
1574 | } |
1575 | } | |
1576 | ||
1577 | static void seek_floppy(void) | |
1578 | { | |
1579 | int track; | |
1580 | ||
1581 | blind_seek = 0; | |
1582 | ||
ded2863d | 1583 | debug_dcl(DP->flags, "calling disk change from %s\n", __func__); |
1da177e4 | 1584 | |
e0298536 | 1585 | if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1586 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { |
1587 | /* the media changed flag should be cleared after the seek. | |
1588 | * If it isn't, this means that there is really no disk in | |
1589 | * the drive. | |
1590 | */ | |
e0298536 | 1591 | set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); |
1da177e4 LT |
1592 | cont->done(0); |
1593 | cont->redo(); | |
1594 | return; | |
1595 | } | |
1596 | if (DRS->track <= NEED_1_RECAL) { | |
1597 | recalibrate_floppy(); | |
1598 | return; | |
e0298536 | 1599 | } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1da177e4 LT |
1600 | (raw_cmd->flags & FD_RAW_NEED_DISK) && |
1601 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { | |
1602 | /* we seek to clear the media-changed condition. Does anybody | |
1603 | * know a more elegant way, which works on all drives? */ | |
1604 | if (raw_cmd->track) | |
1605 | track = raw_cmd->track - 1; | |
1606 | else { | |
1607 | if (DP->flags & FD_SILENT_DCL_CLEAR) { | |
1608 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); | |
1609 | blind_seek = 1; | |
1610 | raw_cmd->flags |= FD_RAW_NEED_SEEK; | |
1611 | } | |
1612 | track = 1; | |
1613 | } | |
1614 | } else { | |
1615 | check_wp(); | |
1616 | if (raw_cmd->track != DRS->track && | |
1617 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) | |
1618 | track = raw_cmd->track; | |
1619 | else { | |
1620 | setup_rw_floppy(); | |
1621 | return; | |
1622 | } | |
1623 | } | |
1624 | ||
1625 | do_floppy = seek_interrupt; | |
1626 | output_byte(FD_SEEK); | |
1627 | output_byte(UNIT(current_drive)); | |
2300f90e JP |
1628 | if (output_byte(track) < 0) { |
1629 | reset_fdc(); | |
1630 | return; | |
1631 | } | |
ded2863d | 1632 | debugt(__func__, ""); |
1da177e4 LT |
1633 | } |
1634 | ||
1635 | static void recal_interrupt(void) | |
1636 | { | |
ded2863d | 1637 | debugt(__func__, ""); |
1da177e4 LT |
1638 | if (inr != 2) |
1639 | FDCS->reset = 1; | |
1640 | else if (ST0 & ST0_ECE) { | |
1641 | switch (DRS->track) { | |
1642 | case NEED_1_RECAL: | |
ded2863d | 1643 | debugt(__func__, "need 1 recal"); |
1da177e4 LT |
1644 | /* after a second recalibrate, we still haven't |
1645 | * reached track 0. Probably no drive. Raise an | |
1646 | * error, as failing immediately might upset | |
1647 | * computers possessed by the Devil :-) */ | |
1648 | cont->error(); | |
1649 | cont->redo(); | |
1650 | return; | |
1651 | case NEED_2_RECAL: | |
ded2863d | 1652 | debugt(__func__, "need 2 recal"); |
1da177e4 LT |
1653 | /* If we already did a recalibrate, |
1654 | * and we are not at track 0, this | |
1655 | * means we have moved. (The only way | |
1656 | * not to move at recalibration is to | |
1657 | * be already at track 0.) Clear the | |
1658 | * new change flag */ | |
87f530d8 JP |
1659 | debug_dcl(DP->flags, |
1660 | "clearing NEWCHANGE flag because of second recalibrate\n"); | |
1da177e4 | 1661 | |
e0298536 | 1662 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1663 | DRS->select_date = jiffies; |
1664 | /* fall through */ | |
1665 | default: | |
ded2863d | 1666 | debugt(__func__, "default"); |
1da177e4 LT |
1667 | /* Recalibrate moves the head by at |
1668 | * most 80 steps. If after one | |
1669 | * recalibrate we don't have reached | |
1670 | * track 0, this might mean that we | |
1671 | * started beyond track 80. Try | |
1672 | * again. */ | |
1673 | DRS->track = NEED_1_RECAL; | |
1674 | break; | |
1675 | } | |
1676 | } else | |
1677 | DRS->track = ST1; | |
1678 | floppy_ready(); | |
1679 | } | |
1680 | ||
1681 | static void print_result(char *message, int inr) | |
1682 | { | |
1683 | int i; | |
1684 | ||
1685 | DPRINT("%s ", message); | |
1686 | if (inr >= 0) | |
1687 | for (i = 0; i < inr; i++) | |
b46df356 JP |
1688 | pr_cont("repl[%d]=%x ", i, reply_buffer[i]); |
1689 | pr_cont("\n"); | |
1da177e4 LT |
1690 | } |
1691 | ||
1692 | /* interrupt handler. Note that this can be called externally on the Sparc */ | |
7d12e780 | 1693 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1da177e4 | 1694 | { |
1da177e4 LT |
1695 | int do_print; |
1696 | unsigned long f; | |
06f748c4 | 1697 | void (*handler)(void) = do_floppy; |
1da177e4 LT |
1698 | |
1699 | lasthandler = handler; | |
1700 | interruptjiffies = jiffies; | |
1701 | ||
1702 | f = claim_dma_lock(); | |
1703 | fd_disable_dma(); | |
1704 | release_dma_lock(f); | |
1705 | ||
1706 | floppy_enable_hlt(); | |
1707 | do_floppy = NULL; | |
1708 | if (fdc >= N_FDC || FDCS->address == -1) { | |
1709 | /* we don't even know which FDC is the culprit */ | |
b46df356 JP |
1710 | pr_info("DOR0=%x\n", fdc_state[0].dor); |
1711 | pr_info("floppy interrupt on bizarre fdc %d\n", fdc); | |
1ebddd85 | 1712 | pr_info("handler=%pf\n", handler); |
275176bc | 1713 | is_alive(__func__, "bizarre fdc"); |
1da177e4 LT |
1714 | return IRQ_NONE; |
1715 | } | |
1716 | ||
1717 | FDCS->reset = 0; | |
1718 | /* We have to clear the reset flag here, because apparently on boxes | |
1719 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to | |
1720 | * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the | |
1721 | * emission of the SENSEI's. | |
1722 | * It is OK to emit floppy commands because we are in an interrupt | |
1723 | * handler here, and thus we have to fear no interference of other | |
1724 | * activity. | |
1725 | */ | |
1726 | ||
29f1c784 | 1727 | do_print = !handler && print_unex && initialized; |
1da177e4 LT |
1728 | |
1729 | inr = result(); | |
1730 | if (do_print) | |
1731 | print_result("unexpected interrupt", inr); | |
1732 | if (inr == 0) { | |
1733 | int max_sensei = 4; | |
1734 | do { | |
1735 | output_byte(FD_SENSEI); | |
1736 | inr = result(); | |
1737 | if (do_print) | |
1738 | print_result("sensei", inr); | |
1739 | max_sensei--; | |
c529730a JP |
1740 | } while ((ST0 & 0x83) != UNIT(current_drive) && |
1741 | inr == 2 && max_sensei); | |
1da177e4 LT |
1742 | } |
1743 | if (!handler) { | |
1744 | FDCS->reset = 1; | |
1745 | return IRQ_NONE; | |
1746 | } | |
1747 | schedule_bh(handler); | |
275176bc | 1748 | is_alive(__func__, "normal interrupt end"); |
1da177e4 LT |
1749 | |
1750 | /* FIXME! Was it really for us? */ | |
1751 | return IRQ_HANDLED; | |
1752 | } | |
1753 | ||
1754 | static void recalibrate_floppy(void) | |
1755 | { | |
ded2863d | 1756 | debugt(__func__, ""); |
1da177e4 LT |
1757 | do_floppy = recal_interrupt; |
1758 | output_byte(FD_RECALIBRATE); | |
15b2630c | 1759 | if (output_byte(UNIT(current_drive)) < 0) |
2300f90e | 1760 | reset_fdc(); |
1da177e4 LT |
1761 | } |
1762 | ||
1763 | /* | |
1764 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. | |
1765 | */ | |
1766 | static void reset_interrupt(void) | |
1767 | { | |
ded2863d | 1768 | debugt(__func__, ""); |
1da177e4 LT |
1769 | result(); /* get the status ready for set_fdc */ |
1770 | if (FDCS->reset) { | |
1ebddd85 | 1771 | pr_info("reset set in interrupt, calling %pf\n", cont->error); |
1da177e4 LT |
1772 | cont->error(); /* a reset just after a reset. BAD! */ |
1773 | } | |
1774 | cont->redo(); | |
1775 | } | |
1776 | ||
1777 | /* | |
1778 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), | |
1779 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) | |
1780 | */ | |
1781 | static void reset_fdc(void) | |
1782 | { | |
1783 | unsigned long flags; | |
1784 | ||
1785 | do_floppy = reset_interrupt; | |
1786 | FDCS->reset = 0; | |
1787 | reset_fdc_info(0); | |
1788 | ||
1789 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ | |
1790 | /* Irrelevant for systems with true DMA (i386). */ | |
1791 | ||
1792 | flags = claim_dma_lock(); | |
1793 | fd_disable_dma(); | |
1794 | release_dma_lock(flags); | |
1795 | ||
1796 | if (FDCS->version >= FDC_82072A) | |
1797 | fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); | |
1798 | else { | |
1799 | fd_outb(FDCS->dor & ~0x04, FD_DOR); | |
1800 | udelay(FD_RESET_DELAY); | |
1801 | fd_outb(FDCS->dor, FD_DOR); | |
1802 | } | |
1803 | } | |
1804 | ||
1805 | static void show_floppy(void) | |
1806 | { | |
1807 | int i; | |
1808 | ||
b46df356 JP |
1809 | pr_info("\n"); |
1810 | pr_info("floppy driver state\n"); | |
1811 | pr_info("-------------------\n"); | |
1ebddd85 | 1812 | pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", |
b46df356 JP |
1813 | jiffies, interruptjiffies, jiffies - interruptjiffies, |
1814 | lasthandler); | |
1da177e4 | 1815 | |
b46df356 JP |
1816 | pr_info("timeout_message=%s\n", timeout_message); |
1817 | pr_info("last output bytes:\n"); | |
1da177e4 | 1818 | for (i = 0; i < OLOGSIZE; i++) |
b46df356 JP |
1819 | pr_info("%2x %2x %lu\n", |
1820 | output_log[(i + output_log_pos) % OLOGSIZE].data, | |
1821 | output_log[(i + output_log_pos) % OLOGSIZE].status, | |
1822 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); | |
1823 | pr_info("last result at %lu\n", resultjiffies); | |
1824 | pr_info("last redo_fd_request at %lu\n", lastredo); | |
1825 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, | |
1826 | reply_buffer, resultsize, true); | |
1da177e4 | 1827 | |
b46df356 JP |
1828 | pr_info("status=%x\n", fd_inb(FD_STATUS)); |
1829 | pr_info("fdc_busy=%lu\n", fdc_busy); | |
1da177e4 | 1830 | if (do_floppy) |
1ebddd85 | 1831 | pr_info("do_floppy=%pf\n", do_floppy); |
365970a1 | 1832 | if (work_pending(&floppy_work)) |
1ebddd85 | 1833 | pr_info("floppy_work.func=%pf\n", floppy_work.func); |
1da177e4 | 1834 | if (timer_pending(&fd_timer)) |
1ebddd85 | 1835 | pr_info("fd_timer.function=%pf\n", fd_timer.function); |
1da177e4 | 1836 | if (timer_pending(&fd_timeout)) { |
1ebddd85 | 1837 | pr_info("timer_function=%pf\n", fd_timeout.function); |
b46df356 JP |
1838 | pr_info("expires=%lu\n", fd_timeout.expires - jiffies); |
1839 | pr_info("now=%lu\n", jiffies); | |
1840 | } | |
1841 | pr_info("cont=%p\n", cont); | |
1842 | pr_info("current_req=%p\n", current_req); | |
1843 | pr_info("command_status=%d\n", command_status); | |
1844 | pr_info("\n"); | |
1da177e4 LT |
1845 | } |
1846 | ||
1847 | static void floppy_shutdown(unsigned long data) | |
1848 | { | |
1849 | unsigned long flags; | |
1850 | ||
29f1c784 | 1851 | if (initialized) |
1da177e4 LT |
1852 | show_floppy(); |
1853 | cancel_activity(); | |
1854 | ||
1855 | floppy_enable_hlt(); | |
1856 | ||
1857 | flags = claim_dma_lock(); | |
1858 | fd_disable_dma(); | |
1859 | release_dma_lock(flags); | |
1860 | ||
1861 | /* avoid dma going to a random drive after shutdown */ | |
1862 | ||
29f1c784 | 1863 | if (initialized) |
1da177e4 LT |
1864 | DPRINT("floppy timeout called\n"); |
1865 | FDCS->reset = 1; | |
1866 | if (cont) { | |
1867 | cont->done(0); | |
1868 | cont->redo(); /* this will recall reset when needed */ | |
1869 | } else { | |
b46df356 | 1870 | pr_info("no cont in shutdown!\n"); |
1da177e4 LT |
1871 | process_fd_request(); |
1872 | } | |
275176bc | 1873 | is_alive(__func__, ""); |
1da177e4 LT |
1874 | } |
1875 | ||
1da177e4 | 1876 | /* start motor, check media-changed condition and write protection */ |
06f748c4 | 1877 | static int start_motor(void (*function)(void)) |
1da177e4 | 1878 | { |
06f748c4 JJ |
1879 | int mask; |
1880 | int data; | |
1da177e4 LT |
1881 | |
1882 | mask = 0xfc; | |
1883 | data = UNIT(current_drive); | |
1884 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { | |
1885 | if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { | |
1886 | set_debugt(); | |
1887 | /* no read since this drive is running */ | |
1888 | DRS->first_read_date = 0; | |
1889 | /* note motor start time if motor is not yet running */ | |
1890 | DRS->spinup_date = jiffies; | |
1891 | data |= (0x10 << UNIT(current_drive)); | |
1892 | } | |
1893 | } else if (FDCS->dor & (0x10 << UNIT(current_drive))) | |
1894 | mask &= ~(0x10 << UNIT(current_drive)); | |
1895 | ||
1896 | /* starts motor and selects floppy */ | |
1897 | del_timer(motor_off_timer + current_drive); | |
1898 | set_dor(fdc, mask, data); | |
1899 | ||
1900 | /* wait_for_completion also schedules reset if needed. */ | |
d7b2b2ec JP |
1901 | return fd_wait_for_completion(DRS->select_date + DP->select_delay, |
1902 | (timeout_fn)function); | |
1da177e4 LT |
1903 | } |
1904 | ||
1905 | static void floppy_ready(void) | |
1906 | { | |
045f9836 JP |
1907 | if (FDCS->reset) { |
1908 | reset_fdc(); | |
1909 | return; | |
1910 | } | |
1da177e4 LT |
1911 | if (start_motor(floppy_ready)) |
1912 | return; | |
1913 | if (fdc_dtr()) | |
1914 | return; | |
1915 | ||
87f530d8 | 1916 | debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); |
1da177e4 LT |
1917 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && |
1918 | disk_change(current_drive) && !DP->select_delay) | |
bb57f0c6 JP |
1919 | twaddle(); /* this clears the dcl on certain |
1920 | * drive/controller combinations */ | |
1da177e4 LT |
1921 | |
1922 | #ifdef fd_chose_dma_mode | |
1923 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { | |
1924 | unsigned long flags = claim_dma_lock(); | |
1925 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); | |
1926 | release_dma_lock(flags); | |
1927 | } | |
1928 | #endif | |
1929 | ||
1930 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { | |
1931 | perpendicular_mode(); | |
1932 | fdc_specify(); /* must be done here because of hut, hlt ... */ | |
1933 | seek_floppy(); | |
1934 | } else { | |
1935 | if ((raw_cmd->flags & FD_RAW_READ) || | |
1936 | (raw_cmd->flags & FD_RAW_WRITE)) | |
1937 | fdc_specify(); | |
1938 | setup_rw_floppy(); | |
1939 | } | |
1940 | } | |
1941 | ||
1942 | static void floppy_start(void) | |
1943 | { | |
73507e6c | 1944 | reschedule_timeout(current_reqD, "floppy start"); |
1da177e4 LT |
1945 | |
1946 | scandrives(); | |
87f530d8 | 1947 | debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); |
e0298536 | 1948 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1da177e4 LT |
1949 | floppy_ready(); |
1950 | } | |
1951 | ||
1952 | /* | |
1953 | * ======================================================================== | |
1954 | * here ends the bottom half. Exported routines are: | |
1955 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, | |
1956 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. | |
1957 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt | |
1958 | * and set_dor. | |
1959 | * ======================================================================== | |
1960 | */ | |
1961 | /* | |
1962 | * General purpose continuations. | |
1963 | * ============================== | |
1964 | */ | |
1965 | ||
1966 | static void do_wakeup(void) | |
1967 | { | |
73507e6c | 1968 | reschedule_timeout(MAXTIMEOUT, "do wakeup"); |
1da177e4 LT |
1969 | cont = NULL; |
1970 | command_status += 2; | |
1971 | wake_up(&command_done); | |
1972 | } | |
1973 | ||
3b06c21e | 1974 | static const struct cont_t wakeup_cont = { |
1da177e4 LT |
1975 | .interrupt = empty, |
1976 | .redo = do_wakeup, | |
1977 | .error = empty, | |
06f748c4 | 1978 | .done = (done_f)empty |
1da177e4 LT |
1979 | }; |
1980 | ||
3b06c21e | 1981 | static const struct cont_t intr_cont = { |
1da177e4 LT |
1982 | .interrupt = empty, |
1983 | .redo = process_fd_request, | |
1984 | .error = empty, | |
06f748c4 | 1985 | .done = (done_f)empty |
1da177e4 LT |
1986 | }; |
1987 | ||
74f63f46 | 1988 | static int wait_til_done(void (*handler)(void), bool interruptible) |
1da177e4 LT |
1989 | { |
1990 | int ret; | |
1991 | ||
1992 | schedule_bh(handler); | |
1993 | ||
b862f26f SH |
1994 | if (interruptible) |
1995 | wait_event_interruptible(command_done, command_status >= 2); | |
1996 | else | |
1997 | wait_event(command_done, command_status >= 2); | |
1da177e4 LT |
1998 | |
1999 | if (command_status < 2) { | |
2000 | cancel_activity(); | |
2001 | cont = &intr_cont; | |
2002 | reset_fdc(); | |
2003 | return -EINTR; | |
2004 | } | |
2005 | ||
2006 | if (FDCS->reset) | |
2007 | command_status = FD_COMMAND_ERROR; | |
2008 | if (command_status == FD_COMMAND_OKAY) | |
2009 | ret = 0; | |
2010 | else | |
2011 | ret = -EIO; | |
2012 | command_status = FD_COMMAND_NONE; | |
2013 | return ret; | |
2014 | } | |
2015 | ||
2016 | static void generic_done(int result) | |
2017 | { | |
2018 | command_status = result; | |
2019 | cont = &wakeup_cont; | |
2020 | } | |
2021 | ||
2022 | static void generic_success(void) | |
2023 | { | |
2024 | cont->done(1); | |
2025 | } | |
2026 | ||
2027 | static void generic_failure(void) | |
2028 | { | |
2029 | cont->done(0); | |
2030 | } | |
2031 | ||
2032 | static void success_and_wakeup(void) | |
2033 | { | |
2034 | generic_success(); | |
2035 | cont->redo(); | |
2036 | } | |
2037 | ||
2038 | /* | |
2039 | * formatting and rw support. | |
2040 | * ========================== | |
2041 | */ | |
2042 | ||
2043 | static int next_valid_format(void) | |
2044 | { | |
2045 | int probed_format; | |
2046 | ||
2047 | probed_format = DRS->probed_format; | |
2048 | while (1) { | |
2049 | if (probed_format >= 8 || !DP->autodetect[probed_format]) { | |
2050 | DRS->probed_format = 0; | |
2051 | return 1; | |
2052 | } | |
2053 | if (floppy_type[DP->autodetect[probed_format]].sect) { | |
2054 | DRS->probed_format = probed_format; | |
2055 | return 0; | |
2056 | } | |
2057 | probed_format++; | |
2058 | } | |
2059 | } | |
2060 | ||
2061 | static void bad_flp_intr(void) | |
2062 | { | |
2063 | int err_count; | |
2064 | ||
2065 | if (probing) { | |
2066 | DRS->probed_format++; | |
2067 | if (!next_valid_format()) | |
2068 | return; | |
2069 | } | |
2070 | err_count = ++(*errors); | |
2071 | INFBOUND(DRWE->badness, err_count); | |
2072 | if (err_count > DP->max_errors.abort) | |
2073 | cont->done(0); | |
2074 | if (err_count > DP->max_errors.reset) | |
2075 | FDCS->reset = 1; | |
2076 | else if (err_count > DP->max_errors.recal) | |
2077 | DRS->track = NEED_2_RECAL; | |
2078 | } | |
2079 | ||
2080 | static void set_floppy(int drive) | |
2081 | { | |
2082 | int type = ITYPE(UDRS->fd_device); | |
06f748c4 | 2083 | |
1da177e4 LT |
2084 | if (type) |
2085 | _floppy = floppy_type + type; | |
2086 | else | |
2087 | _floppy = current_type[drive]; | |
2088 | } | |
2089 | ||
2090 | /* | |
2091 | * formatting support. | |
2092 | * =================== | |
2093 | */ | |
2094 | static void format_interrupt(void) | |
2095 | { | |
2096 | switch (interpret_errors()) { | |
2097 | case 1: | |
2098 | cont->error(); | |
2099 | case 2: | |
2100 | break; | |
2101 | case 0: | |
2102 | cont->done(1); | |
2103 | } | |
2104 | cont->redo(); | |
2105 | } | |
2106 | ||
48c8cee6 | 2107 | #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) |
1da177e4 | 2108 | #define CT(x) ((x) | 0xc0) |
48c8cee6 | 2109 | |
1da177e4 LT |
2110 | static void setup_format_params(int track) |
2111 | { | |
06f748c4 JJ |
2112 | int n; |
2113 | int il; | |
2114 | int count; | |
2115 | int head_shift; | |
2116 | int track_shift; | |
1da177e4 LT |
2117 | struct fparm { |
2118 | unsigned char track, head, sect, size; | |
2119 | } *here = (struct fparm *)floppy_track_buffer; | |
1da177e4 LT |
2120 | |
2121 | raw_cmd = &default_raw_cmd; | |
2122 | raw_cmd->track = track; | |
2123 | ||
48c8cee6 JP |
2124 | raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | |
2125 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); | |
1da177e4 LT |
2126 | raw_cmd->rate = _floppy->rate & 0x43; |
2127 | raw_cmd->cmd_count = NR_F; | |
2128 | COMMAND = FM_MODE(_floppy, FD_FORMAT); | |
2129 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); | |
2130 | F_SIZECODE = FD_SIZECODE(_floppy); | |
2131 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; | |
2132 | F_GAP = _floppy->fmt_gap; | |
2133 | F_FILL = FD_FILL_BYTE; | |
2134 | ||
2135 | raw_cmd->kernel_data = floppy_track_buffer; | |
2136 | raw_cmd->length = 4 * F_SECT_PER_TRACK; | |
2137 | ||
2138 | /* allow for about 30ms for data transport per track */ | |
2139 | head_shift = (F_SECT_PER_TRACK + 5) / 6; | |
2140 | ||
2141 | /* a ``cylinder'' is two tracks plus a little stepping time */ | |
2142 | track_shift = 2 * head_shift + 3; | |
2143 | ||
2144 | /* position of logical sector 1 on this track */ | |
2145 | n = (track_shift * format_req.track + head_shift * format_req.head) | |
2146 | % F_SECT_PER_TRACK; | |
2147 | ||
2148 | /* determine interleave */ | |
2149 | il = 1; | |
2150 | if (_floppy->fmt_gap < 0x22) | |
2151 | il++; | |
2152 | ||
2153 | /* initialize field */ | |
2154 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { | |
2155 | here[count].track = format_req.track; | |
2156 | here[count].head = format_req.head; | |
2157 | here[count].sect = 0; | |
2158 | here[count].size = F_SIZECODE; | |
2159 | } | |
2160 | /* place logical sectors */ | |
2161 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { | |
2162 | here[n].sect = count; | |
2163 | n = (n + il) % F_SECT_PER_TRACK; | |
2164 | if (here[n].sect) { /* sector busy, find next free sector */ | |
2165 | ++n; | |
2166 | if (n >= F_SECT_PER_TRACK) { | |
2167 | n -= F_SECT_PER_TRACK; | |
2168 | while (here[n].sect) | |
2169 | ++n; | |
2170 | } | |
2171 | } | |
2172 | } | |
9e49184c | 2173 | if (_floppy->stretch & FD_SECTBASEMASK) { |
1da177e4 | 2174 | for (count = 0; count < F_SECT_PER_TRACK; count++) |
9e49184c | 2175 | here[count].sect += FD_SECTBASE(_floppy) - 1; |
1da177e4 LT |
2176 | } |
2177 | } | |
2178 | ||
2179 | static void redo_format(void) | |
2180 | { | |
2181 | buffer_track = -1; | |
2182 | setup_format_params(format_req.track << STRETCH(_floppy)); | |
2183 | floppy_start(); | |
ded2863d | 2184 | debugt(__func__, "queue format request"); |
1da177e4 LT |
2185 | } |
2186 | ||
3b06c21e | 2187 | static const struct cont_t format_cont = { |
1da177e4 LT |
2188 | .interrupt = format_interrupt, |
2189 | .redo = redo_format, | |
2190 | .error = bad_flp_intr, | |
2191 | .done = generic_done | |
2192 | }; | |
2193 | ||
2194 | static int do_format(int drive, struct format_descr *tmp_format_req) | |
2195 | { | |
2196 | int ret; | |
2197 | ||
74f63f46 | 2198 | if (lock_fdc(drive, true)) |
52a0d61f JP |
2199 | return -EINTR; |
2200 | ||
1da177e4 LT |
2201 | set_floppy(drive); |
2202 | if (!_floppy || | |
2203 | _floppy->track > DP->tracks || | |
2204 | tmp_format_req->track >= _floppy->track || | |
2205 | tmp_format_req->head >= _floppy->head || | |
2206 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || | |
2207 | !_floppy->fmt_gap) { | |
2208 | process_fd_request(); | |
2209 | return -EINVAL; | |
2210 | } | |
2211 | format_req = *tmp_format_req; | |
2212 | format_errors = 0; | |
2213 | cont = &format_cont; | |
2214 | errors = &format_errors; | |
74f63f46 | 2215 | ret = wait_til_done(redo_format, true); |
55eee80c JP |
2216 | if (ret == -EINTR) |
2217 | return -EINTR; | |
1da177e4 LT |
2218 | process_fd_request(); |
2219 | return ret; | |
2220 | } | |
2221 | ||
2222 | /* | |
2223 | * Buffer read/write and support | |
2224 | * ============================= | |
2225 | */ | |
2226 | ||
1c5093ba | 2227 | static void floppy_end_request(struct request *req, int error) |
1da177e4 LT |
2228 | { |
2229 | unsigned int nr_sectors = current_count_sectors; | |
1c5093ba | 2230 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
1da177e4 LT |
2231 | |
2232 | /* current_count_sectors can be zero if transfer failed */ | |
1c5093ba | 2233 | if (error) |
83096ebf | 2234 | nr_sectors = blk_rq_cur_sectors(req); |
1c5093ba | 2235 | if (__blk_end_request(req, error, nr_sectors << 9)) |
1da177e4 | 2236 | return; |
1da177e4 LT |
2237 | |
2238 | /* We're done with the request */ | |
1c5093ba | 2239 | floppy_off(drive); |
1da177e4 LT |
2240 | current_req = NULL; |
2241 | } | |
2242 | ||
2243 | /* new request_done. Can handle physical sectors which are smaller than a | |
2244 | * logical buffer */ | |
2245 | static void request_done(int uptodate) | |
2246 | { | |
1da177e4 | 2247 | struct request *req = current_req; |
48821184 | 2248 | struct request_queue *q; |
1da177e4 LT |
2249 | unsigned long flags; |
2250 | int block; | |
73507e6c | 2251 | char msg[sizeof("request done ") + sizeof(int) * 3]; |
1da177e4 LT |
2252 | |
2253 | probing = 0; | |
73507e6c JP |
2254 | snprintf(msg, sizeof(msg), "request done %d", uptodate); |
2255 | reschedule_timeout(MAXTIMEOUT, msg); | |
1da177e4 LT |
2256 | |
2257 | if (!req) { | |
b46df356 | 2258 | pr_info("floppy.c: no request in request_done\n"); |
1da177e4 LT |
2259 | return; |
2260 | } | |
2261 | ||
48821184 JA |
2262 | q = req->q; |
2263 | ||
1da177e4 LT |
2264 | if (uptodate) { |
2265 | /* maintain values for invalidation on geometry | |
2266 | * change */ | |
83096ebf | 2267 | block = current_count_sectors + blk_rq_pos(req); |
1da177e4 LT |
2268 | INFBOUND(DRS->maxblock, block); |
2269 | if (block > _floppy->sect) | |
2270 | DRS->maxtrack = 1; | |
2271 | ||
2272 | /* unlock chained buffers */ | |
2273 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2274 | floppy_end_request(req, 0); |
1da177e4 LT |
2275 | spin_unlock_irqrestore(q->queue_lock, flags); |
2276 | } else { | |
2277 | if (rq_data_dir(req) == WRITE) { | |
2278 | /* record write error information */ | |
2279 | DRWE->write_errors++; | |
2280 | if (DRWE->write_errors == 1) { | |
83096ebf | 2281 | DRWE->first_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2282 | DRWE->first_error_generation = DRS->generation; |
2283 | } | |
83096ebf | 2284 | DRWE->last_error_sector = blk_rq_pos(req); |
1da177e4 LT |
2285 | DRWE->last_error_generation = DRS->generation; |
2286 | } | |
2287 | spin_lock_irqsave(q->queue_lock, flags); | |
1c5093ba | 2288 | floppy_end_request(req, -EIO); |
1da177e4 LT |
2289 | spin_unlock_irqrestore(q->queue_lock, flags); |
2290 | } | |
2291 | } | |
2292 | ||
2293 | /* Interrupt handler evaluating the result of the r/w operation */ | |
2294 | static void rw_interrupt(void) | |
2295 | { | |
06f748c4 JJ |
2296 | int eoc; |
2297 | int ssize; | |
2298 | int heads; | |
2299 | int nr_sectors; | |
1da177e4 LT |
2300 | |
2301 | if (R_HEAD >= 2) { | |
2302 | /* some Toshiba floppy controllers occasionnally seem to | |
2303 | * return bogus interrupts after read/write operations, which | |
2304 | * can be recognized by a bad head number (>= 2) */ | |
2305 | return; | |
2306 | } | |
2307 | ||
2308 | if (!DRS->first_read_date) | |
2309 | DRS->first_read_date = jiffies; | |
2310 | ||
2311 | nr_sectors = 0; | |
712e1de4 | 2312 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2313 | |
2314 | if (ST1 & ST1_EOC) | |
2315 | eoc = 1; | |
2316 | else | |
2317 | eoc = 0; | |
2318 | ||
2319 | if (COMMAND & 0x80) | |
2320 | heads = 2; | |
2321 | else | |
2322 | heads = 1; | |
2323 | ||
2324 | nr_sectors = (((R_TRACK - TRACK) * heads + | |
2325 | R_HEAD - HEAD) * SECT_PER_TRACK + | |
2326 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; | |
2327 | ||
1da177e4 | 2328 | if (nr_sectors / ssize > |
061837bc | 2329 | DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
1da177e4 LT |
2330 | DPRINT("long rw: %x instead of %lx\n", |
2331 | nr_sectors, current_count_sectors); | |
b46df356 JP |
2332 | pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); |
2333 | pr_info("rh=%d h=%d\n", R_HEAD, HEAD); | |
2334 | pr_info("rt=%d t=%d\n", R_TRACK, TRACK); | |
2335 | pr_info("heads=%d eoc=%d\n", heads, eoc); | |
2336 | pr_info("spt=%d st=%d ss=%d\n", | |
2337 | SECT_PER_TRACK, fsector_t, ssize); | |
2338 | pr_info("in_sector_offset=%d\n", in_sector_offset); | |
1da177e4 | 2339 | } |
1da177e4 LT |
2340 | |
2341 | nr_sectors -= in_sector_offset; | |
2342 | INFBOUND(nr_sectors, 0); | |
2343 | SUPBOUND(current_count_sectors, nr_sectors); | |
2344 | ||
2345 | switch (interpret_errors()) { | |
2346 | case 2: | |
2347 | cont->redo(); | |
2348 | return; | |
2349 | case 1: | |
2350 | if (!current_count_sectors) { | |
2351 | cont->error(); | |
2352 | cont->redo(); | |
2353 | return; | |
2354 | } | |
2355 | break; | |
2356 | case 0: | |
2357 | if (!current_count_sectors) { | |
2358 | cont->redo(); | |
2359 | return; | |
2360 | } | |
2361 | current_type[current_drive] = _floppy; | |
2362 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2363 | break; | |
2364 | } | |
2365 | ||
2366 | if (probing) { | |
2367 | if (DP->flags & FTD_MSG) | |
2368 | DPRINT("Auto-detected floppy type %s in fd%d\n", | |
2369 | _floppy->name, current_drive); | |
2370 | current_type[current_drive] = _floppy; | |
2371 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; | |
2372 | probing = 0; | |
2373 | } | |
2374 | ||
2375 | if (CT(COMMAND) != FD_READ || | |
2376 | raw_cmd->kernel_data == current_req->buffer) { | |
2377 | /* transfer directly from buffer */ | |
2378 | cont->done(1); | |
2379 | } else if (CT(COMMAND) == FD_READ) { | |
2380 | buffer_track = raw_cmd->track; | |
2381 | buffer_drive = current_drive; | |
2382 | INFBOUND(buffer_max, nr_sectors + fsector_t); | |
2383 | } | |
2384 | cont->redo(); | |
2385 | } | |
2386 | ||
2387 | /* Compute maximal contiguous buffer size. */ | |
2388 | static int buffer_chain_size(void) | |
2389 | { | |
1da177e4 | 2390 | struct bio_vec *bv; |
5705f702 N |
2391 | int size; |
2392 | struct req_iterator iter; | |
1da177e4 LT |
2393 | char *base; |
2394 | ||
2395 | base = bio_data(current_req->bio); | |
2396 | size = 0; | |
2397 | ||
5705f702 N |
2398 | rq_for_each_segment(bv, current_req, iter) { |
2399 | if (page_address(bv->bv_page) + bv->bv_offset != base + size) | |
2400 | break; | |
1da177e4 | 2401 | |
5705f702 | 2402 | size += bv->bv_len; |
1da177e4 LT |
2403 | } |
2404 | ||
2405 | return size >> 9; | |
2406 | } | |
2407 | ||
2408 | /* Compute the maximal transfer size */ | |
2409 | static int transfer_size(int ssize, int max_sector, int max_size) | |
2410 | { | |
2411 | SUPBOUND(max_sector, fsector_t + max_size); | |
2412 | ||
2413 | /* alignment */ | |
2414 | max_sector -= (max_sector % _floppy->sect) % ssize; | |
2415 | ||
2416 | /* transfer size, beginning not aligned */ | |
2417 | current_count_sectors = max_sector - fsector_t; | |
2418 | ||
2419 | return max_sector; | |
2420 | } | |
2421 | ||
2422 | /* | |
2423 | * Move data from/to the track buffer to/from the buffer cache. | |
2424 | */ | |
2425 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) | |
2426 | { | |
2427 | int remaining; /* number of transferred 512-byte sectors */ | |
2428 | struct bio_vec *bv; | |
06f748c4 JJ |
2429 | char *buffer; |
2430 | char *dma_buffer; | |
5705f702 N |
2431 | int size; |
2432 | struct req_iterator iter; | |
1da177e4 LT |
2433 | |
2434 | max_sector = transfer_size(ssize, | |
2435 | min(max_sector, max_sector_2), | |
83096ebf | 2436 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2437 | |
2438 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && | |
83096ebf | 2439 | buffer_max > fsector_t + blk_rq_sectors(current_req)) |
1da177e4 | 2440 | current_count_sectors = min_t(int, buffer_max - fsector_t, |
83096ebf | 2441 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2442 | |
2443 | remaining = current_count_sectors << 9; | |
1011c1b9 | 2444 | if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { |
1da177e4 | 2445 | DPRINT("in copy buffer\n"); |
b46df356 JP |
2446 | pr_info("current_count_sectors=%ld\n", current_count_sectors); |
2447 | pr_info("remaining=%d\n", remaining >> 9); | |
2448 | pr_info("current_req->nr_sectors=%u\n", | |
2449 | blk_rq_sectors(current_req)); | |
2450 | pr_info("current_req->current_nr_sectors=%u\n", | |
2451 | blk_rq_cur_sectors(current_req)); | |
2452 | pr_info("max_sector=%d\n", max_sector); | |
2453 | pr_info("ssize=%d\n", ssize); | |
1da177e4 | 2454 | } |
1da177e4 LT |
2455 | |
2456 | buffer_max = max(max_sector, buffer_max); | |
2457 | ||
2458 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); | |
2459 | ||
1011c1b9 | 2460 | size = blk_rq_cur_bytes(current_req); |
1da177e4 | 2461 | |
5705f702 N |
2462 | rq_for_each_segment(bv, current_req, iter) { |
2463 | if (!remaining) | |
2464 | break; | |
1da177e4 | 2465 | |
5705f702 N |
2466 | size = bv->bv_len; |
2467 | SUPBOUND(size, remaining); | |
1da177e4 | 2468 | |
5705f702 | 2469 | buffer = page_address(bv->bv_page) + bv->bv_offset; |
5705f702 N |
2470 | if (dma_buffer + size > |
2471 | floppy_track_buffer + (max_buffer_sectors << 10) || | |
2472 | dma_buffer < floppy_track_buffer) { | |
2473 | DPRINT("buffer overrun in copy buffer %d\n", | |
b46df356 JP |
2474 | (int)((floppy_track_buffer - dma_buffer) >> 9)); |
2475 | pr_info("fsector_t=%d buffer_min=%d\n", | |
2476 | fsector_t, buffer_min); | |
2477 | pr_info("current_count_sectors=%ld\n", | |
2478 | current_count_sectors); | |
1da177e4 | 2479 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2480 | pr_info("read\n"); |
5705f702 | 2481 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2482 | pr_info("write\n"); |
5705f702 | 2483 | break; |
1da177e4 | 2484 | } |
5705f702 N |
2485 | if (((unsigned long)buffer) % 512) |
2486 | DPRINT("%p buffer not aligned\n", buffer); | |
1a23d133 | 2487 | |
5705f702 N |
2488 | if (CT(COMMAND) == FD_READ) |
2489 | memcpy(buffer, dma_buffer, size); | |
2490 | else | |
2491 | memcpy(dma_buffer, buffer, size); | |
2492 | ||
2493 | remaining -= size; | |
2494 | dma_buffer += size; | |
1da177e4 | 2495 | } |
1da177e4 LT |
2496 | if (remaining) { |
2497 | if (remaining > 0) | |
2498 | max_sector -= remaining >> 9; | |
2499 | DPRINT("weirdness: remaining %d\n", remaining >> 9); | |
2500 | } | |
1da177e4 LT |
2501 | } |
2502 | ||
1da177e4 LT |
2503 | /* work around a bug in pseudo DMA |
2504 | * (on some FDCs) pseudo DMA does not stop when the CPU stops | |
2505 | * sending data. Hence we need a different way to signal the | |
2506 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this | |
2507 | * does not work with MT, hence we can only transfer one head at | |
2508 | * a time | |
2509 | */ | |
2510 | static void virtualdmabug_workaround(void) | |
2511 | { | |
06f748c4 JJ |
2512 | int hard_sectors; |
2513 | int end_sector; | |
1da177e4 LT |
2514 | |
2515 | if (CT(COMMAND) == FD_WRITE) { | |
2516 | COMMAND &= ~0x80; /* switch off multiple track mode */ | |
2517 | ||
2518 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); | |
2519 | end_sector = SECTOR + hard_sectors - 1; | |
1da177e4 | 2520 | if (end_sector > SECT_PER_TRACK) { |
b46df356 JP |
2521 | pr_info("too many sectors %d > %d\n", |
2522 | end_sector, SECT_PER_TRACK); | |
1da177e4 LT |
2523 | return; |
2524 | } | |
48c8cee6 JP |
2525 | SECT_PER_TRACK = end_sector; |
2526 | /* make sure SECT_PER_TRACK | |
2527 | * points to end of transfer */ | |
1da177e4 LT |
2528 | } |
2529 | } | |
2530 | ||
2531 | /* | |
2532 | * Formulate a read/write request. | |
2533 | * this routine decides where to load the data (directly to buffer, or to | |
2534 | * tmp floppy area), how much data to load (the size of the buffer, the whole | |
2535 | * track, or a single sector) | |
2536 | * All floppy_track_buffer handling goes in here. If we ever add track buffer | |
2537 | * allocation on the fly, it should be done here. No other part should need | |
2538 | * modification. | |
2539 | */ | |
2540 | ||
2541 | static int make_raw_rw_request(void) | |
2542 | { | |
2543 | int aligned_sector_t; | |
06f748c4 JJ |
2544 | int max_sector; |
2545 | int max_size; | |
2546 | int tracksize; | |
2547 | int ssize; | |
1da177e4 | 2548 | |
01b6b67e | 2549 | if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) |
1da177e4 | 2550 | return 0; |
1da177e4 LT |
2551 | |
2552 | set_fdc((long)current_req->rq_disk->private_data); | |
2553 | ||
2554 | raw_cmd = &default_raw_cmd; | |
2555 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_DISK | | |
2556 | FD_RAW_NEED_SEEK; | |
2557 | raw_cmd->cmd_count = NR_RW; | |
2558 | if (rq_data_dir(current_req) == READ) { | |
2559 | raw_cmd->flags |= FD_RAW_READ; | |
2560 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2561 | } else if (rq_data_dir(current_req) == WRITE) { | |
2562 | raw_cmd->flags |= FD_RAW_WRITE; | |
2563 | COMMAND = FM_MODE(_floppy, FD_WRITE); | |
2564 | } else { | |
275176bc | 2565 | DPRINT("%s: unknown command\n", __func__); |
1da177e4 LT |
2566 | return 0; |
2567 | } | |
2568 | ||
2569 | max_sector = _floppy->sect * _floppy->head; | |
2570 | ||
83096ebf TH |
2571 | TRACK = (int)blk_rq_pos(current_req) / max_sector; |
2572 | fsector_t = (int)blk_rq_pos(current_req) % max_sector; | |
1da177e4 | 2573 | if (_floppy->track && TRACK >= _floppy->track) { |
83096ebf | 2574 | if (blk_rq_cur_sectors(current_req) & 1) { |
1da177e4 LT |
2575 | current_count_sectors = 1; |
2576 | return 1; | |
2577 | } else | |
2578 | return 0; | |
2579 | } | |
2580 | HEAD = fsector_t / _floppy->sect; | |
2581 | ||
9e49184c | 2582 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
e0298536 JP |
2583 | test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && |
2584 | fsector_t < _floppy->sect) | |
1da177e4 LT |
2585 | max_sector = _floppy->sect; |
2586 | ||
2587 | /* 2M disks have phantom sectors on the first track */ | |
2588 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { | |
2589 | max_sector = 2 * _floppy->sect / 3; | |
2590 | if (fsector_t >= max_sector) { | |
2591 | current_count_sectors = | |
2592 | min_t(int, _floppy->sect - fsector_t, | |
83096ebf | 2593 | blk_rq_sectors(current_req)); |
1da177e4 LT |
2594 | return 1; |
2595 | } | |
2596 | SIZECODE = 2; | |
2597 | } else | |
2598 | SIZECODE = FD_SIZECODE(_floppy); | |
2599 | raw_cmd->rate = _floppy->rate & 0x43; | |
2600 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) | |
2601 | raw_cmd->rate = 1; | |
2602 | ||
2603 | if (SIZECODE) | |
2604 | SIZECODE2 = 0xff; | |
2605 | else | |
2606 | SIZECODE2 = 0x80; | |
2607 | raw_cmd->track = TRACK << STRETCH(_floppy); | |
2608 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); | |
2609 | GAP = _floppy->gap; | |
712e1de4 | 2610 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
1da177e4 LT |
2611 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; |
2612 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + | |
9e49184c | 2613 | FD_SECTBASE(_floppy); |
1da177e4 LT |
2614 | |
2615 | /* tracksize describes the size which can be filled up with sectors | |
2616 | * of size ssize. | |
2617 | */ | |
2618 | tracksize = _floppy->sect - _floppy->sect % ssize; | |
2619 | if (tracksize < _floppy->sect) { | |
2620 | SECT_PER_TRACK++; | |
2621 | if (tracksize <= fsector_t % _floppy->sect) | |
2622 | SECTOR--; | |
2623 | ||
2624 | /* if we are beyond tracksize, fill up using smaller sectors */ | |
2625 | while (tracksize <= fsector_t % _floppy->sect) { | |
2626 | while (tracksize + ssize > _floppy->sect) { | |
2627 | SIZECODE--; | |
2628 | ssize >>= 1; | |
2629 | } | |
2630 | SECTOR++; | |
2631 | SECT_PER_TRACK++; | |
2632 | tracksize += ssize; | |
2633 | } | |
2634 | max_sector = HEAD * _floppy->sect + tracksize; | |
2635 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { | |
2636 | max_sector = _floppy->sect; | |
2637 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { | |
2638 | /* for virtual DMA bug workaround */ | |
2639 | max_sector = _floppy->sect; | |
2640 | } | |
2641 | ||
2642 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; | |
2643 | aligned_sector_t = fsector_t - in_sector_offset; | |
83096ebf | 2644 | max_size = blk_rq_sectors(current_req); |
1da177e4 LT |
2645 | if ((raw_cmd->track == buffer_track) && |
2646 | (current_drive == buffer_drive) && | |
2647 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { | |
2648 | /* data already in track buffer */ | |
2649 | if (CT(COMMAND) == FD_READ) { | |
2650 | copy_buffer(1, max_sector, buffer_max); | |
2651 | return 1; | |
2652 | } | |
83096ebf | 2653 | } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { |
1da177e4 | 2654 | if (CT(COMMAND) == FD_WRITE) { |
d7b2b2ec JP |
2655 | unsigned int sectors; |
2656 | ||
2657 | sectors = fsector_t + blk_rq_sectors(current_req); | |
2658 | if (sectors > ssize && sectors < ssize + ssize) | |
1da177e4 LT |
2659 | max_size = ssize + ssize; |
2660 | else | |
2661 | max_size = ssize; | |
2662 | } | |
2663 | raw_cmd->flags &= ~FD_RAW_WRITE; | |
2664 | raw_cmd->flags |= FD_RAW_READ; | |
2665 | COMMAND = FM_MODE(_floppy, FD_READ); | |
2666 | } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { | |
2667 | unsigned long dma_limit; | |
2668 | int direct, indirect; | |
2669 | ||
2670 | indirect = | |
2671 | transfer_size(ssize, max_sector, | |
2672 | max_buffer_sectors * 2) - fsector_t; | |
2673 | ||
2674 | /* | |
2675 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide | |
2676 | * on a 64 bit machine! | |
2677 | */ | |
2678 | max_size = buffer_chain_size(); | |
d7b2b2ec JP |
2679 | dma_limit = (MAX_DMA_ADDRESS - |
2680 | ((unsigned long)current_req->buffer)) >> 9; | |
a81ee544 | 2681 | if ((unsigned long)max_size > dma_limit) |
1da177e4 | 2682 | max_size = dma_limit; |
1da177e4 LT |
2683 | /* 64 kb boundaries */ |
2684 | if (CROSS_64KB(current_req->buffer, max_size << 9)) | |
2685 | max_size = (K_64 - | |
2686 | ((unsigned long)current_req->buffer) % | |
2687 | K_64) >> 9; | |
2688 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; | |
2689 | /* | |
2690 | * We try to read tracks, but if we get too many errors, we | |
2691 | * go back to reading just one sector at a time. | |
2692 | * | |
2693 | * This means we should be able to read a sector even if there | |
2694 | * are other bad sectors on this track. | |
2695 | */ | |
2696 | if (!direct || | |
2697 | (indirect * 2 > direct * 3 && | |
d7b2b2ec JP |
2698 | *errors < DP->max_errors.read_track && |
2699 | ((!probing || | |
2700 | (DP->read_track & (1 << DRS->probed_format)))))) { | |
83096ebf | 2701 | max_size = blk_rq_sectors(current_req); |
1da177e4 LT |
2702 | } else { |
2703 | raw_cmd->kernel_data = current_req->buffer; | |
2704 | raw_cmd->length = current_count_sectors << 9; | |
2705 | if (raw_cmd->length == 0) { | |
275176bc | 2706 | DPRINT("%s: zero dma transfer attempted\n", __func__); |
d7b2b2ec | 2707 | DPRINT("indirect=%d direct=%d fsector_t=%d\n", |
1da177e4 LT |
2708 | indirect, direct, fsector_t); |
2709 | return 0; | |
2710 | } | |
1da177e4 LT |
2711 | virtualdmabug_workaround(); |
2712 | return 2; | |
2713 | } | |
2714 | } | |
2715 | ||
2716 | if (CT(COMMAND) == FD_READ) | |
2717 | max_size = max_sector; /* unbounded */ | |
2718 | ||
2719 | /* claim buffer track if needed */ | |
2720 | if (buffer_track != raw_cmd->track || /* bad track */ | |
2721 | buffer_drive != current_drive || /* bad drive */ | |
2722 | fsector_t > buffer_max || | |
2723 | fsector_t < buffer_min || | |
2724 | ((CT(COMMAND) == FD_READ || | |
83096ebf | 2725 | (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && |
1da177e4 | 2726 | max_sector > 2 * max_buffer_sectors + buffer_min && |
bb57f0c6 JP |
2727 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { |
2728 | /* not enough space */ | |
1da177e4 LT |
2729 | buffer_track = -1; |
2730 | buffer_drive = current_drive; | |
2731 | buffer_max = buffer_min = aligned_sector_t; | |
2732 | } | |
2733 | raw_cmd->kernel_data = floppy_track_buffer + | |
bb57f0c6 | 2734 | ((aligned_sector_t - buffer_min) << 9); |
1da177e4 LT |
2735 | |
2736 | if (CT(COMMAND) == FD_WRITE) { | |
2737 | /* copy write buffer to track buffer. | |
2738 | * if we get here, we know that the write | |
2739 | * is either aligned or the data already in the buffer | |
2740 | * (buffer will be overwritten) */ | |
1da177e4 LT |
2741 | if (in_sector_offset && buffer_track == -1) |
2742 | DPRINT("internal error offset !=0 on write\n"); | |
1da177e4 LT |
2743 | buffer_track = raw_cmd->track; |
2744 | buffer_drive = current_drive; | |
2745 | copy_buffer(ssize, max_sector, | |
2746 | 2 * max_buffer_sectors + buffer_min); | |
2747 | } else | |
2748 | transfer_size(ssize, max_sector, | |
2749 | 2 * max_buffer_sectors + buffer_min - | |
2750 | aligned_sector_t); | |
2751 | ||
2752 | /* round up current_count_sectors to get dma xfer size */ | |
2753 | raw_cmd->length = in_sector_offset + current_count_sectors; | |
2754 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; | |
2755 | raw_cmd->length <<= 9; | |
1da177e4 LT |
2756 | if ((raw_cmd->length < current_count_sectors << 9) || |
2757 | (raw_cmd->kernel_data != current_req->buffer && | |
2758 | CT(COMMAND) == FD_WRITE && | |
2759 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || | |
2760 | aligned_sector_t < buffer_min)) || | |
2761 | raw_cmd->length % (128 << SIZECODE) || | |
2762 | raw_cmd->length <= 0 || current_count_sectors <= 0) { | |
2763 | DPRINT("fractionary current count b=%lx s=%lx\n", | |
2764 | raw_cmd->length, current_count_sectors); | |
2765 | if (raw_cmd->kernel_data != current_req->buffer) | |
b46df356 JP |
2766 | pr_info("addr=%d, length=%ld\n", |
2767 | (int)((raw_cmd->kernel_data - | |
2768 | floppy_track_buffer) >> 9), | |
2769 | current_count_sectors); | |
2770 | pr_info("st=%d ast=%d mse=%d msi=%d\n", | |
2771 | fsector_t, aligned_sector_t, max_sector, max_size); | |
2772 | pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); | |
2773 | pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", | |
2774 | COMMAND, SECTOR, HEAD, TRACK); | |
2775 | pr_info("buffer drive=%d\n", buffer_drive); | |
2776 | pr_info("buffer track=%d\n", buffer_track); | |
2777 | pr_info("buffer_min=%d\n", buffer_min); | |
2778 | pr_info("buffer_max=%d\n", buffer_max); | |
1da177e4 LT |
2779 | return 0; |
2780 | } | |
2781 | ||
2782 | if (raw_cmd->kernel_data != current_req->buffer) { | |
2783 | if (raw_cmd->kernel_data < floppy_track_buffer || | |
2784 | current_count_sectors < 0 || | |
2785 | raw_cmd->length < 0 || | |
2786 | raw_cmd->kernel_data + raw_cmd->length > | |
2787 | floppy_track_buffer + (max_buffer_sectors << 10)) { | |
2788 | DPRINT("buffer overrun in schedule dma\n"); | |
b46df356 JP |
2789 | pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", |
2790 | fsector_t, buffer_min, raw_cmd->length >> 9); | |
2791 | pr_info("current_count_sectors=%ld\n", | |
2792 | current_count_sectors); | |
1da177e4 | 2793 | if (CT(COMMAND) == FD_READ) |
b46df356 | 2794 | pr_info("read\n"); |
1da177e4 | 2795 | if (CT(COMMAND) == FD_WRITE) |
b46df356 | 2796 | pr_info("write\n"); |
1da177e4 LT |
2797 | return 0; |
2798 | } | |
1011c1b9 | 2799 | } else if (raw_cmd->length > blk_rq_bytes(current_req) || |
83096ebf | 2800 | current_count_sectors > blk_rq_sectors(current_req)) { |
1da177e4 LT |
2801 | DPRINT("buffer overrun in direct transfer\n"); |
2802 | return 0; | |
2803 | } else if (raw_cmd->length < current_count_sectors << 9) { | |
2804 | DPRINT("more sectors than bytes\n"); | |
b46df356 JP |
2805 | pr_info("bytes=%ld\n", raw_cmd->length >> 9); |
2806 | pr_info("sectors=%ld\n", current_count_sectors); | |
1da177e4 LT |
2807 | } |
2808 | if (raw_cmd->length == 0) { | |
2809 | DPRINT("zero dma transfer attempted from make_raw_request\n"); | |
2810 | return 0; | |
2811 | } | |
1da177e4 LT |
2812 | |
2813 | virtualdmabug_workaround(); | |
2814 | return 2; | |
2815 | } | |
2816 | ||
48821184 JA |
2817 | /* |
2818 | * Round-robin between our available drives, doing one request from each | |
2819 | */ | |
2820 | static int set_next_request(void) | |
2821 | { | |
2822 | struct request_queue *q; | |
2823 | int old_pos = fdc_queue; | |
2824 | ||
2825 | do { | |
2826 | q = disks[fdc_queue]->queue; | |
2827 | if (++fdc_queue == N_DRIVE) | |
2828 | fdc_queue = 0; | |
2829 | if (q) { | |
2830 | current_req = blk_fetch_request(q); | |
2831 | if (current_req) | |
2832 | break; | |
2833 | } | |
2834 | } while (fdc_queue != old_pos); | |
2835 | ||
2836 | return current_req != NULL; | |
2837 | } | |
2838 | ||
1da177e4 LT |
2839 | static void redo_fd_request(void) |
2840 | { | |
1da177e4 LT |
2841 | int drive; |
2842 | int tmp; | |
2843 | ||
2844 | lastredo = jiffies; | |
2845 | if (current_drive < N_DRIVE) | |
2846 | floppy_off(current_drive); | |
2847 | ||
0da3132f JP |
2848 | do_request: |
2849 | if (!current_req) { | |
48821184 JA |
2850 | int pending; |
2851 | ||
2852 | spin_lock_irq(&floppy_lock); | |
2853 | pending = set_next_request(); | |
2854 | spin_unlock_irq(&floppy_lock); | |
0da3132f | 2855 | |
48821184 | 2856 | if (!pending) { |
0da3132f JP |
2857 | do_floppy = NULL; |
2858 | unlock_fdc(); | |
1da177e4 | 2859 | return; |
1da177e4 | 2860 | } |
0da3132f JP |
2861 | } |
2862 | drive = (long)current_req->rq_disk->private_data; | |
2863 | set_fdc(drive); | |
73507e6c | 2864 | reschedule_timeout(current_reqD, "redo fd request"); |
1da177e4 | 2865 | |
0da3132f JP |
2866 | set_floppy(drive); |
2867 | raw_cmd = &default_raw_cmd; | |
2868 | raw_cmd->flags = 0; | |
2869 | if (start_motor(redo_fd_request)) | |
1da177e4 | 2870 | return; |
0da3132f JP |
2871 | |
2872 | disk_change(current_drive); | |
2873 | if (test_bit(current_drive, &fake_change) || | |
2874 | test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { | |
2875 | DPRINT("disk absent or changed during operation\n"); | |
2876 | request_done(0); | |
2877 | goto do_request; | |
2878 | } | |
2879 | if (!_floppy) { /* Autodetection */ | |
2880 | if (!probing) { | |
2881 | DRS->probed_format = 0; | |
2882 | if (next_valid_format()) { | |
2883 | DPRINT("no autodetectable formats\n"); | |
2884 | _floppy = NULL; | |
2885 | request_done(0); | |
2886 | goto do_request; | |
2887 | } | |
2888 | } | |
2889 | probing = 1; | |
2890 | _floppy = floppy_type + DP->autodetect[DRS->probed_format]; | |
2891 | } else | |
2892 | probing = 0; | |
2893 | errors = &(current_req->errors); | |
2894 | tmp = make_raw_rw_request(); | |
2895 | if (tmp < 2) { | |
2896 | request_done(tmp); | |
2897 | goto do_request; | |
1da177e4 | 2898 | } |
0da3132f JP |
2899 | |
2900 | if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) | |
2901 | twaddle(); | |
2902 | schedule_bh(floppy_start); | |
ded2863d | 2903 | debugt(__func__, "queue fd request"); |
0da3132f | 2904 | return; |
1da177e4 LT |
2905 | } |
2906 | ||
3b06c21e | 2907 | static const struct cont_t rw_cont = { |
1da177e4 LT |
2908 | .interrupt = rw_interrupt, |
2909 | .redo = redo_fd_request, | |
2910 | .error = bad_flp_intr, | |
2911 | .done = request_done | |
2912 | }; | |
2913 | ||
2914 | static void process_fd_request(void) | |
2915 | { | |
2916 | cont = &rw_cont; | |
2917 | schedule_bh(redo_fd_request); | |
2918 | } | |
2919 | ||
d7b2b2ec | 2920 | static void do_fd_request(struct request_queue *q) |
1da177e4 | 2921 | { |
01b6b67e SH |
2922 | if (WARN(max_buffer_sectors == 0, |
2923 | "VFS: %s called on non-open device\n", __func__)) | |
1da177e4 | 2924 | return; |
1da177e4 | 2925 | |
01b6b67e SH |
2926 | if (WARN(atomic_read(&usage_count) == 0, |
2927 | "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n", | |
2928 | current_req, (long)blk_rq_pos(current_req), current_req->cmd_type, | |
2929 | current_req->cmd_flags)) | |
1da177e4 | 2930 | return; |
01b6b67e | 2931 | |
1da177e4 LT |
2932 | if (test_bit(0, &fdc_busy)) { |
2933 | /* fdc busy, this new request will be treated when the | |
2934 | current one is done */ | |
275176bc | 2935 | is_alive(__func__, "old request running"); |
1da177e4 LT |
2936 | return; |
2937 | } | |
74f63f46 | 2938 | lock_fdc(MAXTIMEOUT, false); |
1da177e4 | 2939 | process_fd_request(); |
275176bc | 2940 | is_alive(__func__, ""); |
1da177e4 LT |
2941 | } |
2942 | ||
3b06c21e | 2943 | static const struct cont_t poll_cont = { |
1da177e4 LT |
2944 | .interrupt = success_and_wakeup, |
2945 | .redo = floppy_ready, | |
2946 | .error = generic_failure, | |
2947 | .done = generic_done | |
2948 | }; | |
2949 | ||
74f63f46 | 2950 | static int poll_drive(bool interruptible, int flag) |
1da177e4 | 2951 | { |
1da177e4 LT |
2952 | /* no auto-sense, just clear dcl */ |
2953 | raw_cmd = &default_raw_cmd; | |
2954 | raw_cmd->flags = flag; | |
2955 | raw_cmd->track = 0; | |
2956 | raw_cmd->cmd_count = 0; | |
2957 | cont = &poll_cont; | |
87f530d8 | 2958 | debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); |
e0298536 | 2959 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
55eee80c JP |
2960 | |
2961 | return wait_til_done(floppy_ready, interruptible); | |
1da177e4 LT |
2962 | } |
2963 | ||
2964 | /* | |
2965 | * User triggered reset | |
2966 | * ==================== | |
2967 | */ | |
2968 | ||
2969 | static void reset_intr(void) | |
2970 | { | |
b46df356 | 2971 | pr_info("weird, reset interrupt called\n"); |
1da177e4 LT |
2972 | } |
2973 | ||
3b06c21e | 2974 | static const struct cont_t reset_cont = { |
1da177e4 LT |
2975 | .interrupt = reset_intr, |
2976 | .redo = success_and_wakeup, | |
2977 | .error = generic_failure, | |
2978 | .done = generic_done | |
2979 | }; | |
2980 | ||
74f63f46 | 2981 | static int user_reset_fdc(int drive, int arg, bool interruptible) |
1da177e4 LT |
2982 | { |
2983 | int ret; | |
2984 | ||
52a0d61f JP |
2985 | if (lock_fdc(drive, interruptible)) |
2986 | return -EINTR; | |
2987 | ||
1da177e4 LT |
2988 | if (arg == FD_RESET_ALWAYS) |
2989 | FDCS->reset = 1; | |
2990 | if (FDCS->reset) { | |
2991 | cont = &reset_cont; | |
55eee80c JP |
2992 | ret = wait_til_done(reset_fdc, interruptible); |
2993 | if (ret == -EINTR) | |
2994 | return -EINTR; | |
1da177e4 LT |
2995 | } |
2996 | process_fd_request(); | |
52a0d61f | 2997 | return 0; |
1da177e4 LT |
2998 | } |
2999 | ||
3000 | /* | |
3001 | * Misc Ioctl's and support | |
3002 | * ======================== | |
3003 | */ | |
3004 | static inline int fd_copyout(void __user *param, const void *address, | |
3005 | unsigned long size) | |
3006 | { | |
3007 | return copy_to_user(param, address, size) ? -EFAULT : 0; | |
3008 | } | |
3009 | ||
48c8cee6 JP |
3010 | static inline int fd_copyin(void __user *param, void *address, |
3011 | unsigned long size) | |
1da177e4 LT |
3012 | { |
3013 | return copy_from_user(address, param, size) ? -EFAULT : 0; | |
3014 | } | |
3015 | ||
be7a12bb | 3016 | static const char *drive_name(int type, int drive) |
1da177e4 LT |
3017 | { |
3018 | struct floppy_struct *floppy; | |
3019 | ||
3020 | if (type) | |
3021 | floppy = floppy_type + type; | |
3022 | else { | |
3023 | if (UDP->native_format) | |
3024 | floppy = floppy_type + UDP->native_format; | |
3025 | else | |
3026 | return "(null)"; | |
3027 | } | |
3028 | if (floppy->name) | |
3029 | return floppy->name; | |
3030 | else | |
3031 | return "(null)"; | |
3032 | } | |
3033 | ||
3034 | /* raw commands */ | |
3035 | static void raw_cmd_done(int flag) | |
3036 | { | |
3037 | int i; | |
3038 | ||
3039 | if (!flag) { | |
3040 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3041 | raw_cmd->flags |= FD_RAW_HARDFAILURE; | |
3042 | } else { | |
3043 | raw_cmd->reply_count = inr; | |
3044 | if (raw_cmd->reply_count > MAX_REPLIES) | |
3045 | raw_cmd->reply_count = 0; | |
3046 | for (i = 0; i < raw_cmd->reply_count; i++) | |
3047 | raw_cmd->reply[i] = reply_buffer[i]; | |
3048 | ||
3049 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3050 | unsigned long flags; | |
3051 | flags = claim_dma_lock(); | |
3052 | raw_cmd->length = fd_get_dma_residue(); | |
3053 | release_dma_lock(flags); | |
3054 | } | |
3055 | ||
3056 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && | |
3057 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) | |
3058 | raw_cmd->flags |= FD_RAW_FAILURE; | |
3059 | ||
3060 | if (disk_change(current_drive)) | |
3061 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; | |
3062 | else | |
3063 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; | |
3064 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) | |
3065 | motor_off_callback(current_drive); | |
3066 | ||
3067 | if (raw_cmd->next && | |
3068 | (!(raw_cmd->flags & FD_RAW_FAILURE) || | |
3069 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && | |
3070 | ((raw_cmd->flags & FD_RAW_FAILURE) || | |
3071 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { | |
3072 | raw_cmd = raw_cmd->next; | |
3073 | return; | |
3074 | } | |
3075 | } | |
3076 | generic_done(flag); | |
3077 | } | |
3078 | ||
3b06c21e | 3079 | static const struct cont_t raw_cmd_cont = { |
1da177e4 LT |
3080 | .interrupt = success_and_wakeup, |
3081 | .redo = floppy_start, | |
3082 | .error = generic_failure, | |
3083 | .done = raw_cmd_done | |
3084 | }; | |
3085 | ||
be7a12bb | 3086 | static int raw_cmd_copyout(int cmd, void __user *param, |
1da177e4 LT |
3087 | struct floppy_raw_cmd *ptr) |
3088 | { | |
3089 | int ret; | |
3090 | ||
3091 | while (ptr) { | |
ce2f11fe | 3092 | ret = copy_to_user(param, ptr, sizeof(*ptr)); |
86b12b48 JP |
3093 | if (ret) |
3094 | return -EFAULT; | |
1da177e4 LT |
3095 | param += sizeof(struct floppy_raw_cmd); |
3096 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { | |
bb57f0c6 JP |
3097 | if (ptr->length >= 0 && |
3098 | ptr->length <= ptr->buffer_length) { | |
3099 | long length = ptr->buffer_length - ptr->length; | |
4575b552 JP |
3100 | ret = fd_copyout(ptr->data, ptr->kernel_data, |
3101 | length); | |
3102 | if (ret) | |
3103 | return ret; | |
bb57f0c6 | 3104 | } |
1da177e4 LT |
3105 | } |
3106 | ptr = ptr->next; | |
3107 | } | |
7f252717 | 3108 | |
1da177e4 LT |
3109 | return 0; |
3110 | } | |
3111 | ||
3112 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) | |
3113 | { | |
06f748c4 JJ |
3114 | struct floppy_raw_cmd *next; |
3115 | struct floppy_raw_cmd *this; | |
1da177e4 LT |
3116 | |
3117 | this = *ptr; | |
3118 | *ptr = NULL; | |
3119 | while (this) { | |
3120 | if (this->buffer_length) { | |
3121 | fd_dma_mem_free((unsigned long)this->kernel_data, | |
3122 | this->buffer_length); | |
3123 | this->buffer_length = 0; | |
3124 | } | |
3125 | next = this->next; | |
3126 | kfree(this); | |
3127 | this = next; | |
3128 | } | |
3129 | } | |
3130 | ||
be7a12bb | 3131 | static int raw_cmd_copyin(int cmd, void __user *param, |
1da177e4 LT |
3132 | struct floppy_raw_cmd **rcmd) |
3133 | { | |
3134 | struct floppy_raw_cmd *ptr; | |
3135 | int ret; | |
3136 | int i; | |
3137 | ||
3138 | *rcmd = NULL; | |
7f252717 JP |
3139 | |
3140 | loop: | |
3141 | ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); | |
3142 | if (!ptr) | |
3143 | return -ENOMEM; | |
3144 | *rcmd = ptr; | |
3145 | ret = copy_from_user(ptr, param, sizeof(*ptr)); | |
3146 | if (ret) | |
3147 | return -EFAULT; | |
3148 | ptr->next = NULL; | |
3149 | ptr->buffer_length = 0; | |
3150 | param += sizeof(struct floppy_raw_cmd); | |
3151 | if (ptr->cmd_count > 33) | |
1da177e4 LT |
3152 | /* the command may now also take up the space |
3153 | * initially intended for the reply & the | |
3154 | * reply count. Needed for long 82078 commands | |
3155 | * such as RESTORE, which takes ... 17 command | |
3156 | * bytes. Murphy's law #137: When you reserve | |
3157 | * 16 bytes for a structure, you'll one day | |
3158 | * discover that you really need 17... | |
3159 | */ | |
7f252717 JP |
3160 | return -EINVAL; |
3161 | ||
3162 | for (i = 0; i < 16; i++) | |
3163 | ptr->reply[i] = 0; | |
3164 | ptr->resultcode = 0; | |
3165 | ptr->kernel_data = NULL; | |
3166 | ||
3167 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { | |
3168 | if (ptr->length <= 0) | |
1da177e4 | 3169 | return -EINVAL; |
7f252717 JP |
3170 | ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); |
3171 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); | |
3172 | if (!ptr->kernel_data) | |
3173 | return -ENOMEM; | |
3174 | ptr->buffer_length = ptr->length; | |
3175 | } | |
3176 | if (ptr->flags & FD_RAW_WRITE) { | |
3177 | ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); | |
3178 | if (ret) | |
3179 | return ret; | |
3180 | } | |
1da177e4 | 3181 | |
7f252717 | 3182 | if (ptr->flags & FD_RAW_MORE) { |
1da177e4 | 3183 | rcmd = &(ptr->next); |
1da177e4 | 3184 | ptr->rate &= 0x43; |
7f252717 | 3185 | goto loop; |
1da177e4 | 3186 | } |
7f252717 JP |
3187 | |
3188 | return 0; | |
1da177e4 LT |
3189 | } |
3190 | ||
3191 | static int raw_cmd_ioctl(int cmd, void __user *param) | |
3192 | { | |
1da177e4 | 3193 | struct floppy_raw_cmd *my_raw_cmd; |
06f748c4 JJ |
3194 | int drive; |
3195 | int ret2; | |
3196 | int ret; | |
1da177e4 LT |
3197 | |
3198 | if (FDCS->rawcmd <= 1) | |
3199 | FDCS->rawcmd = 1; | |
3200 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3201 | if (FDC(drive) != fdc) | |
3202 | continue; | |
3203 | if (drive == current_drive) { | |
3204 | if (UDRS->fd_ref > 1) { | |
3205 | FDCS->rawcmd = 2; | |
3206 | break; | |
3207 | } | |
3208 | } else if (UDRS->fd_ref) { | |
3209 | FDCS->rawcmd = 2; | |
3210 | break; | |
3211 | } | |
3212 | } | |
3213 | ||
3214 | if (FDCS->reset) | |
3215 | return -EIO; | |
3216 | ||
3217 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); | |
3218 | if (ret) { | |
3219 | raw_cmd_free(&my_raw_cmd); | |
3220 | return ret; | |
3221 | } | |
3222 | ||
3223 | raw_cmd = my_raw_cmd; | |
3224 | cont = &raw_cmd_cont; | |
74f63f46 | 3225 | ret = wait_til_done(floppy_start, true); |
87f530d8 | 3226 | debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); |
1da177e4 LT |
3227 | |
3228 | if (ret != -EINTR && FDCS->reset) | |
3229 | ret = -EIO; | |
3230 | ||
3231 | DRS->track = NO_TRACK; | |
3232 | ||
3233 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); | |
3234 | if (!ret) | |
3235 | ret = ret2; | |
3236 | raw_cmd_free(&my_raw_cmd); | |
3237 | return ret; | |
3238 | } | |
3239 | ||
3240 | static int invalidate_drive(struct block_device *bdev) | |
3241 | { | |
3242 | /* invalidate the buffer track to force a reread */ | |
3243 | set_bit((long)bdev->bd_disk->private_data, &fake_change); | |
3244 | process_fd_request(); | |
3245 | check_disk_change(bdev); | |
3246 | return 0; | |
3247 | } | |
3248 | ||
be7a12bb | 3249 | static int set_geometry(unsigned int cmd, struct floppy_struct *g, |
1da177e4 LT |
3250 | int drive, int type, struct block_device *bdev) |
3251 | { | |
3252 | int cnt; | |
3253 | ||
3254 | /* sanity checking for parameters. */ | |
3255 | if (g->sect <= 0 || | |
3256 | g->head <= 0 || | |
3257 | g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || | |
3258 | /* check if reserved bits are set */ | |
9e49184c | 3259 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
1da177e4 LT |
3260 | return -EINVAL; |
3261 | if (type) { | |
3262 | if (!capable(CAP_SYS_ADMIN)) | |
3263 | return -EPERM; | |
b1c82b5c | 3264 | mutex_lock(&open_lock); |
74f63f46 | 3265 | if (lock_fdc(drive, true)) { |
8516a500 JS |
3266 | mutex_unlock(&open_lock); |
3267 | return -EINTR; | |
3268 | } | |
1da177e4 LT |
3269 | floppy_type[type] = *g; |
3270 | floppy_type[type].name = "user format"; | |
3271 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) | |
3272 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = | |
3273 | floppy_type[type].size + 1; | |
3274 | process_fd_request(); | |
3275 | for (cnt = 0; cnt < N_DRIVE; cnt++) { | |
3276 | struct block_device *bdev = opened_bdev[cnt]; | |
3277 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) | |
3278 | continue; | |
2ef41634 | 3279 | __invalidate_device(bdev); |
1da177e4 | 3280 | } |
b1c82b5c | 3281 | mutex_unlock(&open_lock); |
1da177e4 LT |
3282 | } else { |
3283 | int oldStretch; | |
52a0d61f | 3284 | |
74f63f46 | 3285 | if (lock_fdc(drive, true)) |
52a0d61f | 3286 | return -EINTR; |
4575b552 | 3287 | if (cmd != FDDEFPRM) { |
1da177e4 LT |
3288 | /* notice a disk change immediately, else |
3289 | * we lose our settings immediately*/ | |
74f63f46 | 3290 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 JP |
3291 | return -EINTR; |
3292 | } | |
1da177e4 LT |
3293 | oldStretch = g->stretch; |
3294 | user_params[drive] = *g; | |
3295 | if (buffer_drive == drive) | |
3296 | SUPBOUND(buffer_max, user_params[drive].sect); | |
3297 | current_type[drive] = &user_params[drive]; | |
3298 | floppy_sizes[drive] = user_params[drive].size; | |
3299 | if (cmd == FDDEFPRM) | |
3300 | DRS->keep_data = -1; | |
3301 | else | |
3302 | DRS->keep_data = 1; | |
3303 | /* invalidation. Invalidate only when needed, i.e. | |
3304 | * when there are already sectors in the buffer cache | |
3305 | * whose number will change. This is useful, because | |
3306 | * mtools often changes the geometry of the disk after | |
3307 | * looking at the boot block */ | |
3308 | if (DRS->maxblock > user_params[drive].sect || | |
3309 | DRS->maxtrack || | |
3310 | ((user_params[drive].sect ^ oldStretch) & | |
9e49184c | 3311 | (FD_SWAPSIDES | FD_SECTBASEMASK))) |
1da177e4 LT |
3312 | invalidate_drive(bdev); |
3313 | else | |
3314 | process_fd_request(); | |
3315 | } | |
3316 | return 0; | |
3317 | } | |
3318 | ||
3319 | /* handle obsolete ioctl's */ | |
21af5448 | 3320 | static unsigned int ioctl_table[] = { |
1da177e4 LT |
3321 | FDCLRPRM, |
3322 | FDSETPRM, | |
3323 | FDDEFPRM, | |
3324 | FDGETPRM, | |
3325 | FDMSGON, | |
3326 | FDMSGOFF, | |
3327 | FDFMTBEG, | |
3328 | FDFMTTRK, | |
3329 | FDFMTEND, | |
3330 | FDSETEMSGTRESH, | |
3331 | FDFLUSH, | |
3332 | FDSETMAXERRS, | |
3333 | FDGETMAXERRS, | |
3334 | FDGETDRVTYP, | |
3335 | FDSETDRVPRM, | |
3336 | FDGETDRVPRM, | |
3337 | FDGETDRVSTAT, | |
3338 | FDPOLLDRVSTAT, | |
3339 | FDRESET, | |
3340 | FDGETFDCSTAT, | |
3341 | FDWERRORCLR, | |
3342 | FDWERRORGET, | |
3343 | FDRAWCMD, | |
3344 | FDEJECT, | |
3345 | FDTWADDLE | |
3346 | }; | |
3347 | ||
21af5448 | 3348 | static int normalize_ioctl(unsigned int *cmd, int *size) |
1da177e4 LT |
3349 | { |
3350 | int i; | |
3351 | ||
3352 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { | |
3353 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { | |
3354 | *size = _IOC_SIZE(*cmd); | |
3355 | *cmd = ioctl_table[i]; | |
3356 | if (*size > _IOC_SIZE(*cmd)) { | |
b46df356 | 3357 | pr_info("ioctl not yet supported\n"); |
1da177e4 LT |
3358 | return -EFAULT; |
3359 | } | |
3360 | return 0; | |
3361 | } | |
3362 | } | |
3363 | return -EINVAL; | |
3364 | } | |
3365 | ||
3366 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) | |
3367 | { | |
3368 | if (type) | |
3369 | *g = &floppy_type[type]; | |
3370 | else { | |
74f63f46 | 3371 | if (lock_fdc(drive, false)) |
52a0d61f | 3372 | return -EINTR; |
74f63f46 | 3373 | if (poll_drive(false, 0) == -EINTR) |
4575b552 | 3374 | return -EINTR; |
1da177e4 LT |
3375 | process_fd_request(); |
3376 | *g = current_type[drive]; | |
3377 | } | |
3378 | if (!*g) | |
3379 | return -ENODEV; | |
3380 | return 0; | |
3381 | } | |
3382 | ||
a885c8c4 CH |
3383 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3384 | { | |
3385 | int drive = (long)bdev->bd_disk->private_data; | |
3386 | int type = ITYPE(drive_state[drive].fd_device); | |
3387 | struct floppy_struct *g; | |
3388 | int ret; | |
3389 | ||
3390 | ret = get_floppy_geometry(drive, type, &g); | |
3391 | if (ret) | |
3392 | return ret; | |
3393 | ||
3394 | geo->heads = g->head; | |
3395 | geo->sectors = g->sect; | |
3396 | geo->cylinders = g->track; | |
3397 | return 0; | |
3398 | } | |
3399 | ||
8a6cfeb6 | 3400 | static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
1da177e4 LT |
3401 | unsigned long param) |
3402 | { | |
a4af9b48 | 3403 | int drive = (long)bdev->bd_disk->private_data; |
06f748c4 JJ |
3404 | int type = ITYPE(UDRS->fd_device); |
3405 | int i; | |
1da177e4 LT |
3406 | int ret; |
3407 | int size; | |
3408 | union inparam { | |
3409 | struct floppy_struct g; /* geometry */ | |
3410 | struct format_descr f; | |
3411 | struct floppy_max_errors max_errors; | |
3412 | struct floppy_drive_params dp; | |
3413 | } inparam; /* parameters coming from user space */ | |
724ee626 | 3414 | const void *outparam; /* parameters passed back to user space */ |
1da177e4 LT |
3415 | |
3416 | /* convert compatibility eject ioctls into floppy eject ioctl. | |
3417 | * We do this in order to provide a means to eject floppy disks before | |
3418 | * installing the new fdutils package */ | |
3419 | if (cmd == CDROMEJECT || /* CD-ROM eject */ | |
a81ee544 | 3420 | cmd == 0x6470) { /* SunOS floppy eject */ |
1da177e4 LT |
3421 | DPRINT("obsolete eject ioctl\n"); |
3422 | DPRINT("please use floppycontrol --eject\n"); | |
3423 | cmd = FDEJECT; | |
3424 | } | |
3425 | ||
a81ee544 | 3426 | if (!((cmd & 0xff00) == 0x0200)) |
1da177e4 LT |
3427 | return -EINVAL; |
3428 | ||
a81ee544 | 3429 | /* convert the old style command into a new style command */ |
4575b552 JP |
3430 | ret = normalize_ioctl(&cmd, &size); |
3431 | if (ret) | |
3432 | return ret; | |
a81ee544 | 3433 | |
1da177e4 | 3434 | /* permission checks */ |
0aad92cf | 3435 | if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || |
1da177e4 LT |
3436 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) |
3437 | return -EPERM; | |
3438 | ||
2886a8bd AV |
3439 | if (WARN_ON(size < 0 || size > sizeof(inparam))) |
3440 | return -EINVAL; | |
3441 | ||
1da177e4 | 3442 | /* copyin */ |
b87c9e0a | 3443 | memset(&inparam, 0, sizeof(inparam)); |
4575b552 JP |
3444 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
3445 | ret = fd_copyin((void __user *)param, &inparam, size); | |
3446 | if (ret) | |
3447 | return ret; | |
3448 | } | |
1da177e4 | 3449 | |
da273653 JP |
3450 | switch (cmd) { |
3451 | case FDEJECT: | |
3452 | if (UDRS->fd_ref != 1) | |
3453 | /* somebody else has this drive open */ | |
3454 | return -EBUSY; | |
74f63f46 | 3455 | if (lock_fdc(drive, true)) |
52a0d61f | 3456 | return -EINTR; |
1da177e4 | 3457 | |
da273653 JP |
3458 | /* do the actual eject. Fails on |
3459 | * non-Sparc architectures */ | |
3460 | ret = fd_eject(UNIT(drive)); | |
1da177e4 | 3461 | |
e0298536 JP |
3462 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3463 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
da273653 JP |
3464 | process_fd_request(); |
3465 | return ret; | |
3466 | case FDCLRPRM: | |
74f63f46 | 3467 | if (lock_fdc(drive, true)) |
52a0d61f | 3468 | return -EINTR; |
da273653 JP |
3469 | current_type[drive] = NULL; |
3470 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; | |
3471 | UDRS->keep_data = 0; | |
3472 | return invalidate_drive(bdev); | |
3473 | case FDSETPRM: | |
3474 | case FDDEFPRM: | |
3475 | return set_geometry(cmd, &inparam.g, drive, type, bdev); | |
3476 | case FDGETPRM: | |
4575b552 | 3477 | ret = get_floppy_geometry(drive, type, |
724ee626 | 3478 | (struct floppy_struct **)&outparam); |
4575b552 JP |
3479 | if (ret) |
3480 | return ret; | |
da273653 JP |
3481 | break; |
3482 | case FDMSGON: | |
3483 | UDP->flags |= FTD_MSG; | |
3484 | return 0; | |
3485 | case FDMSGOFF: | |
3486 | UDP->flags &= ~FTD_MSG; | |
3487 | return 0; | |
3488 | case FDFMTBEG: | |
74f63f46 | 3489 | if (lock_fdc(drive, true)) |
52a0d61f | 3490 | return -EINTR; |
74f63f46 | 3491 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3492 | return -EINTR; |
da273653 JP |
3493 | ret = UDRS->flags; |
3494 | process_fd_request(); | |
3495 | if (ret & FD_VERIFY) | |
3496 | return -ENODEV; | |
3497 | if (!(ret & FD_DISK_WRITABLE)) | |
3498 | return -EROFS; | |
3499 | return 0; | |
3500 | case FDFMTTRK: | |
3501 | if (UDRS->fd_ref != 1) | |
3502 | return -EBUSY; | |
3503 | return do_format(drive, &inparam.f); | |
3504 | case FDFMTEND: | |
3505 | case FDFLUSH: | |
74f63f46 | 3506 | if (lock_fdc(drive, true)) |
52a0d61f | 3507 | return -EINTR; |
da273653 JP |
3508 | return invalidate_drive(bdev); |
3509 | case FDSETEMSGTRESH: | |
3510 | UDP->max_errors.reporting = (unsigned short)(param & 0x0f); | |
3511 | return 0; | |
3512 | case FDGETMAXERRS: | |
724ee626 | 3513 | outparam = &UDP->max_errors; |
da273653 JP |
3514 | break; |
3515 | case FDSETMAXERRS: | |
3516 | UDP->max_errors = inparam.max_errors; | |
3517 | break; | |
3518 | case FDGETDRVTYP: | |
3519 | outparam = drive_name(type, drive); | |
724ee626 | 3520 | SUPBOUND(size, strlen((const char *)outparam) + 1); |
da273653 JP |
3521 | break; |
3522 | case FDSETDRVPRM: | |
3523 | *UDP = inparam.dp; | |
3524 | break; | |
3525 | case FDGETDRVPRM: | |
724ee626 | 3526 | outparam = UDP; |
da273653 JP |
3527 | break; |
3528 | case FDPOLLDRVSTAT: | |
74f63f46 | 3529 | if (lock_fdc(drive, true)) |
52a0d61f | 3530 | return -EINTR; |
74f63f46 | 3531 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
4575b552 | 3532 | return -EINTR; |
da273653 JP |
3533 | process_fd_request(); |
3534 | /* fall through */ | |
3535 | case FDGETDRVSTAT: | |
724ee626 | 3536 | outparam = UDRS; |
da273653 JP |
3537 | break; |
3538 | case FDRESET: | |
74f63f46 | 3539 | return user_reset_fdc(drive, (int)param, true); |
da273653 | 3540 | case FDGETFDCSTAT: |
724ee626 | 3541 | outparam = UFDCS; |
da273653 JP |
3542 | break; |
3543 | case FDWERRORCLR: | |
3544 | memset(UDRWE, 0, sizeof(*UDRWE)); | |
3545 | return 0; | |
3546 | case FDWERRORGET: | |
724ee626 | 3547 | outparam = UDRWE; |
da273653 JP |
3548 | break; |
3549 | case FDRAWCMD: | |
3550 | if (type) | |
1da177e4 | 3551 | return -EINVAL; |
74f63f46 | 3552 | if (lock_fdc(drive, true)) |
52a0d61f | 3553 | return -EINTR; |
da273653 | 3554 | set_floppy(drive); |
4575b552 JP |
3555 | i = raw_cmd_ioctl(cmd, (void __user *)param); |
3556 | if (i == -EINTR) | |
3557 | return -EINTR; | |
da273653 JP |
3558 | process_fd_request(); |
3559 | return i; | |
3560 | case FDTWADDLE: | |
74f63f46 | 3561 | if (lock_fdc(drive, true)) |
52a0d61f | 3562 | return -EINTR; |
da273653 JP |
3563 | twaddle(); |
3564 | process_fd_request(); | |
3565 | return 0; | |
3566 | default: | |
3567 | return -EINVAL; | |
3568 | } | |
1da177e4 LT |
3569 | |
3570 | if (_IOC_DIR(cmd) & _IOC_READ) | |
3571 | return fd_copyout((void __user *)param, outparam, size); | |
da273653 JP |
3572 | |
3573 | return 0; | |
1da177e4 LT |
3574 | } |
3575 | ||
8a6cfeb6 AB |
3576 | static int fd_ioctl(struct block_device *bdev, fmode_t mode, |
3577 | unsigned int cmd, unsigned long param) | |
3578 | { | |
3579 | int ret; | |
3580 | ||
2a48fc0a | 3581 | mutex_lock(&floppy_mutex); |
8a6cfeb6 | 3582 | ret = fd_locked_ioctl(bdev, mode, cmd, param); |
2a48fc0a | 3583 | mutex_unlock(&floppy_mutex); |
8a6cfeb6 AB |
3584 | |
3585 | return ret; | |
3586 | } | |
3587 | ||
1da177e4 LT |
3588 | static void __init config_types(void) |
3589 | { | |
b46df356 | 3590 | bool has_drive = false; |
1da177e4 LT |
3591 | int drive; |
3592 | ||
3593 | /* read drive info out of physical CMOS */ | |
3594 | drive = 0; | |
3595 | if (!UDP->cmos) | |
3596 | UDP->cmos = FLOPPY0_TYPE; | |
3597 | drive = 1; | |
3598 | if (!UDP->cmos && FLOPPY1_TYPE) | |
3599 | UDP->cmos = FLOPPY1_TYPE; | |
3600 | ||
06f748c4 | 3601 | /* FIXME: additional physical CMOS drive detection should go here */ |
1da177e4 LT |
3602 | |
3603 | for (drive = 0; drive < N_DRIVE; drive++) { | |
3604 | unsigned int type = UDP->cmos; | |
3605 | struct floppy_drive_params *params; | |
3606 | const char *name = NULL; | |
3607 | static char temparea[32]; | |
3608 | ||
945f390f | 3609 | if (type < ARRAY_SIZE(default_drive_params)) { |
1da177e4 LT |
3610 | params = &default_drive_params[type].params; |
3611 | if (type) { | |
3612 | name = default_drive_params[type].name; | |
3613 | allowed_drive_mask |= 1 << drive; | |
3614 | } else | |
3615 | allowed_drive_mask &= ~(1 << drive); | |
3616 | } else { | |
3617 | params = &default_drive_params[0].params; | |
3618 | sprintf(temparea, "unknown type %d (usb?)", type); | |
3619 | name = temparea; | |
3620 | } | |
3621 | if (name) { | |
b46df356 JP |
3622 | const char *prepend; |
3623 | if (!has_drive) { | |
3624 | prepend = ""; | |
3625 | has_drive = true; | |
3626 | pr_info("Floppy drive(s):"); | |
3627 | } else { | |
3628 | prepend = ","; | |
1da177e4 | 3629 | } |
b46df356 JP |
3630 | |
3631 | pr_cont("%s fd%d is %s", prepend, drive, name); | |
1da177e4 LT |
3632 | } |
3633 | *UDP = *params; | |
3634 | } | |
b46df356 JP |
3635 | |
3636 | if (has_drive) | |
3637 | pr_cont("\n"); | |
1da177e4 LT |
3638 | } |
3639 | ||
a4af9b48 | 3640 | static int floppy_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 3641 | { |
a4af9b48 | 3642 | int drive = (long)disk->private_data; |
1da177e4 | 3643 | |
2a48fc0a | 3644 | mutex_lock(&floppy_mutex); |
b1c82b5c | 3645 | mutex_lock(&open_lock); |
1da177e4 LT |
3646 | if (UDRS->fd_ref < 0) |
3647 | UDRS->fd_ref = 0; | |
3648 | else if (!UDRS->fd_ref--) { | |
3649 | DPRINT("floppy_release with fd_ref == 0"); | |
3650 | UDRS->fd_ref = 0; | |
3651 | } | |
3652 | if (!UDRS->fd_ref) | |
3653 | opened_bdev[drive] = NULL; | |
b1c82b5c | 3654 | mutex_unlock(&open_lock); |
2a48fc0a | 3655 | mutex_unlock(&floppy_mutex); |
3e541a4a | 3656 | |
1da177e4 LT |
3657 | return 0; |
3658 | } | |
3659 | ||
3660 | /* | |
3661 | * floppy_open check for aliasing (/dev/fd0 can be the same as | |
3662 | * /dev/PS0 etc), and disallows simultaneous access to the same | |
3663 | * drive with different device numbers. | |
3664 | */ | |
a4af9b48 | 3665 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 3666 | { |
a4af9b48 AV |
3667 | int drive = (long)bdev->bd_disk->private_data; |
3668 | int old_dev, new_dev; | |
1da177e4 LT |
3669 | int try; |
3670 | int res = -EBUSY; | |
3671 | char *tmp; | |
3672 | ||
2a48fc0a | 3673 | mutex_lock(&floppy_mutex); |
b1c82b5c | 3674 | mutex_lock(&open_lock); |
1da177e4 | 3675 | old_dev = UDRS->fd_device; |
a4af9b48 | 3676 | if (opened_bdev[drive] && opened_bdev[drive] != bdev) |
1da177e4 LT |
3677 | goto out2; |
3678 | ||
3679 | if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { | |
e0298536 JP |
3680 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3681 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
1da177e4 LT |
3682 | } |
3683 | ||
a4af9b48 | 3684 | if (UDRS->fd_ref == -1 || (UDRS->fd_ref && (mode & FMODE_EXCL))) |
1da177e4 LT |
3685 | goto out2; |
3686 | ||
a4af9b48 | 3687 | if (mode & FMODE_EXCL) |
1da177e4 LT |
3688 | UDRS->fd_ref = -1; |
3689 | else | |
3690 | UDRS->fd_ref++; | |
3691 | ||
a4af9b48 | 3692 | opened_bdev[drive] = bdev; |
1da177e4 LT |
3693 | |
3694 | res = -ENXIO; | |
3695 | ||
3696 | if (!floppy_track_buffer) { | |
3697 | /* if opening an ED drive, reserve a big buffer, | |
3698 | * else reserve a small one */ | |
3699 | if ((UDP->cmos == 6) || (UDP->cmos == 5)) | |
3700 | try = 64; /* Only 48 actually useful */ | |
3701 | else | |
3702 | try = 32; /* Only 24 actually useful */ | |
3703 | ||
3704 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3705 | if (!tmp && !floppy_track_buffer) { | |
3706 | try >>= 1; /* buffer only one side */ | |
3707 | INFBOUND(try, 16); | |
3708 | tmp = (char *)fd_dma_mem_alloc(1024 * try); | |
3709 | } | |
a81ee544 | 3710 | if (!tmp && !floppy_track_buffer) |
1da177e4 | 3711 | fallback_on_nodma_alloc(&tmp, 2048 * try); |
1da177e4 LT |
3712 | if (!tmp && !floppy_track_buffer) { |
3713 | DPRINT("Unable to allocate DMA memory\n"); | |
3714 | goto out; | |
3715 | } | |
3716 | if (floppy_track_buffer) { | |
3717 | if (tmp) | |
3718 | fd_dma_mem_free((unsigned long)tmp, try * 1024); | |
3719 | } else { | |
3720 | buffer_min = buffer_max = -1; | |
3721 | floppy_track_buffer = tmp; | |
3722 | max_buffer_sectors = try; | |
3723 | } | |
3724 | } | |
3725 | ||
a4af9b48 AV |
3726 | new_dev = MINOR(bdev->bd_dev); |
3727 | UDRS->fd_device = new_dev; | |
3728 | set_capacity(disks[drive], floppy_sizes[new_dev]); | |
3729 | if (old_dev != -1 && old_dev != new_dev) { | |
1da177e4 LT |
3730 | if (buffer_drive == drive) |
3731 | buffer_track = -1; | |
3732 | } | |
3733 | ||
1da177e4 LT |
3734 | if (UFDCS->rawcmd == 1) |
3735 | UFDCS->rawcmd = 2; | |
3736 | ||
a4af9b48 AV |
3737 | if (!(mode & FMODE_NDELAY)) { |
3738 | if (mode & (FMODE_READ|FMODE_WRITE)) { | |
1da177e4 | 3739 | UDRS->last_checked = 0; |
a4af9b48 | 3740 | check_disk_change(bdev); |
e0298536 | 3741 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) |
1da177e4 LT |
3742 | goto out; |
3743 | } | |
3744 | res = -EROFS; | |
e0298536 JP |
3745 | if ((mode & FMODE_WRITE) && |
3746 | !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) | |
1da177e4 LT |
3747 | goto out; |
3748 | } | |
b1c82b5c | 3749 | mutex_unlock(&open_lock); |
2a48fc0a | 3750 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
3751 | return 0; |
3752 | out: | |
3753 | if (UDRS->fd_ref < 0) | |
3754 | UDRS->fd_ref = 0; | |
3755 | else | |
3756 | UDRS->fd_ref--; | |
3757 | if (!UDRS->fd_ref) | |
3758 | opened_bdev[drive] = NULL; | |
1da177e4 | 3759 | out2: |
b1c82b5c | 3760 | mutex_unlock(&open_lock); |
2a48fc0a | 3761 | mutex_unlock(&floppy_mutex); |
1da177e4 LT |
3762 | return res; |
3763 | } | |
3764 | ||
3765 | /* | |
3766 | * Check if the disk has been changed or if a change has been faked. | |
3767 | */ | |
3768 | static int check_floppy_change(struct gendisk *disk) | |
3769 | { | |
3770 | int drive = (long)disk->private_data; | |
3771 | ||
e0298536 JP |
3772 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3773 | test_bit(FD_VERIFY_BIT, &UDRS->flags)) | |
1da177e4 LT |
3774 | return 1; |
3775 | ||
50297cbf | 3776 | if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { |
74f63f46 JP |
3777 | lock_fdc(drive, false); |
3778 | poll_drive(false, 0); | |
1da177e4 | 3779 | process_fd_request(); |
1da177e4 LT |
3780 | } |
3781 | ||
e0298536 JP |
3782 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3783 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || | |
1da177e4 LT |
3784 | test_bit(drive, &fake_change) || |
3785 | (!ITYPE(UDRS->fd_device) && !current_type[drive])) | |
3786 | return 1; | |
3787 | return 0; | |
3788 | } | |
3789 | ||
3790 | /* | |
3791 | * This implements "read block 0" for floppy_revalidate(). | |
3792 | * Needed for format autodetection, checking whether there is | |
3793 | * a disk in the drive, and whether that disk is writable. | |
3794 | */ | |
3795 | ||
bb57f0c6 | 3796 | static void floppy_rb0_complete(struct bio *bio, int err) |
1da177e4 | 3797 | { |
1da177e4 | 3798 | complete((struct completion *)bio->bi_private); |
1da177e4 LT |
3799 | } |
3800 | ||
3801 | static int __floppy_read_block_0(struct block_device *bdev) | |
3802 | { | |
3803 | struct bio bio; | |
3804 | struct bio_vec bio_vec; | |
3805 | struct completion complete; | |
3806 | struct page *page; | |
3807 | size_t size; | |
3808 | ||
3809 | page = alloc_page(GFP_NOIO); | |
3810 | if (!page) { | |
3811 | process_fd_request(); | |
3812 | return -ENOMEM; | |
3813 | } | |
3814 | ||
3815 | size = bdev->bd_block_size; | |
3816 | if (!size) | |
3817 | size = 1024; | |
3818 | ||
3819 | bio_init(&bio); | |
3820 | bio.bi_io_vec = &bio_vec; | |
3821 | bio_vec.bv_page = page; | |
3822 | bio_vec.bv_len = size; | |
3823 | bio_vec.bv_offset = 0; | |
3824 | bio.bi_vcnt = 1; | |
3825 | bio.bi_idx = 0; | |
3826 | bio.bi_size = size; | |
3827 | bio.bi_bdev = bdev; | |
3828 | bio.bi_sector = 0; | |
41a55b4d | 3829 | bio.bi_flags = BIO_QUIET; |
1da177e4 LT |
3830 | init_completion(&complete); |
3831 | bio.bi_private = &complete; | |
3832 | bio.bi_end_io = floppy_rb0_complete; | |
3833 | ||
3834 | submit_bio(READ, &bio); | |
3835 | generic_unplug_device(bdev_get_queue(bdev)); | |
3836 | process_fd_request(); | |
3837 | wait_for_completion(&complete); | |
3838 | ||
3839 | __free_page(page); | |
3840 | ||
3841 | return 0; | |
3842 | } | |
3843 | ||
3844 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading | |
3845 | * the bootblock (block 0). "Autodetection" is also needed to check whether | |
3846 | * there is a disk in the drive at all... Thus we also do it for fixed | |
3847 | * geometry formats */ | |
3848 | static int floppy_revalidate(struct gendisk *disk) | |
3849 | { | |
3850 | int drive = (long)disk->private_data; | |
3851 | #define NO_GEOM (!current_type[drive] && !ITYPE(UDRS->fd_device)) | |
3852 | int cf; | |
3853 | int res = 0; | |
3854 | ||
e0298536 JP |
3855 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3856 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || | |
3857 | test_bit(drive, &fake_change) || NO_GEOM) { | |
01b6b67e SH |
3858 | if (WARN(atomic_read(&usage_count) == 0, |
3859 | "VFS: revalidate called on non-open device.\n")) | |
1da177e4 | 3860 | return -EFAULT; |
01b6b67e | 3861 | |
74f63f46 | 3862 | lock_fdc(drive, false); |
e0298536 JP |
3863 | cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3864 | test_bit(FD_VERIFY_BIT, &UDRS->flags)); | |
1da177e4 LT |
3865 | if (!(cf || test_bit(drive, &fake_change) || NO_GEOM)) { |
3866 | process_fd_request(); /*already done by another thread */ | |
3867 | return 0; | |
3868 | } | |
3869 | UDRS->maxblock = 0; | |
3870 | UDRS->maxtrack = 0; | |
3871 | if (buffer_drive == drive) | |
3872 | buffer_track = -1; | |
3873 | clear_bit(drive, &fake_change); | |
e0298536 | 3874 | clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
1da177e4 LT |
3875 | if (cf) |
3876 | UDRS->generation++; | |
3877 | if (NO_GEOM) { | |
3878 | /* auto-sensing */ | |
3879 | res = __floppy_read_block_0(opened_bdev[drive]); | |
3880 | } else { | |
3881 | if (cf) | |
74f63f46 | 3882 | poll_drive(false, FD_RAW_NEED_DISK); |
1da177e4 LT |
3883 | process_fd_request(); |
3884 | } | |
3885 | } | |
3886 | set_capacity(disk, floppy_sizes[UDRS->fd_device]); | |
3887 | return res; | |
3888 | } | |
3889 | ||
83d5cde4 | 3890 | static const struct block_device_operations floppy_fops = { |
06f748c4 | 3891 | .owner = THIS_MODULE, |
a4af9b48 AV |
3892 | .open = floppy_open, |
3893 | .release = floppy_release, | |
8a6cfeb6 | 3894 | .ioctl = fd_ioctl, |
06f748c4 JJ |
3895 | .getgeo = fd_getgeo, |
3896 | .media_changed = check_floppy_change, | |
3897 | .revalidate_disk = floppy_revalidate, | |
1da177e4 | 3898 | }; |
1da177e4 | 3899 | |
1da177e4 LT |
3900 | /* |
3901 | * Floppy Driver initialization | |
3902 | * ============================= | |
3903 | */ | |
3904 | ||
3905 | /* Determine the floppy disk controller type */ | |
3906 | /* This routine was written by David C. Niemi */ | |
3907 | static char __init get_fdc_version(void) | |
3908 | { | |
3909 | int r; | |
3910 | ||
3911 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ | |
3912 | if (FDCS->reset) | |
3913 | return FDC_NONE; | |
d7b2b2ec JP |
3914 | r = result(); |
3915 | if (r <= 0x00) | |
1da177e4 LT |
3916 | return FDC_NONE; /* No FDC present ??? */ |
3917 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 3918 | pr_info("FDC %d is an 8272A\n", fdc); |
1da177e4 LT |
3919 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ |
3920 | } | |
3921 | if (r != 10) { | |
b46df356 JP |
3922 | pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", |
3923 | fdc, r); | |
1da177e4 LT |
3924 | return FDC_UNKNOWN; |
3925 | } | |
3926 | ||
3927 | if (!fdc_configure()) { | |
b46df356 | 3928 | pr_info("FDC %d is an 82072\n", fdc); |
1da177e4 LT |
3929 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ |
3930 | } | |
3931 | ||
3932 | output_byte(FD_PERPENDICULAR); | |
3933 | if (need_more_output() == MORE_OUTPUT) { | |
3934 | output_byte(0); | |
3935 | } else { | |
b46df356 | 3936 | pr_info("FDC %d is an 82072A\n", fdc); |
1da177e4 LT |
3937 | return FDC_82072A; /* 82072A as found on Sparcs. */ |
3938 | } | |
3939 | ||
3940 | output_byte(FD_UNLOCK); | |
3941 | r = result(); | |
3942 | if ((r == 1) && (reply_buffer[0] == 0x80)) { | |
b46df356 | 3943 | pr_info("FDC %d is a pre-1991 82077\n", fdc); |
d7b2b2ec | 3944 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know |
1da177e4 LT |
3945 | * LOCK/UNLOCK */ |
3946 | } | |
3947 | if ((r != 1) || (reply_buffer[0] != 0x00)) { | |
b46df356 JP |
3948 | pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", |
3949 | fdc, r); | |
1da177e4 LT |
3950 | return FDC_UNKNOWN; |
3951 | } | |
3952 | output_byte(FD_PARTID); | |
3953 | r = result(); | |
3954 | if (r != 1) { | |
b46df356 JP |
3955 | pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", |
3956 | fdc, r); | |
1da177e4 LT |
3957 | return FDC_UNKNOWN; |
3958 | } | |
3959 | if (reply_buffer[0] == 0x80) { | |
b46df356 | 3960 | pr_info("FDC %d is a post-1991 82077\n", fdc); |
1da177e4 LT |
3961 | return FDC_82077; /* Revised 82077AA passes all the tests */ |
3962 | } | |
3963 | switch (reply_buffer[0] >> 5) { | |
3964 | case 0x0: | |
3965 | /* Either a 82078-1 or a 82078SL running at 5Volt */ | |
b46df356 | 3966 | pr_info("FDC %d is an 82078.\n", fdc); |
1da177e4 LT |
3967 | return FDC_82078; |
3968 | case 0x1: | |
b46df356 | 3969 | pr_info("FDC %d is a 44pin 82078\n", fdc); |
1da177e4 LT |
3970 | return FDC_82078; |
3971 | case 0x2: | |
b46df356 | 3972 | pr_info("FDC %d is a S82078B\n", fdc); |
1da177e4 LT |
3973 | return FDC_S82078B; |
3974 | case 0x3: | |
b46df356 | 3975 | pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); |
1da177e4 LT |
3976 | return FDC_87306; |
3977 | default: | |
b46df356 JP |
3978 | pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", |
3979 | fdc, reply_buffer[0] >> 5); | |
1da177e4 LT |
3980 | return FDC_82078_UNKN; |
3981 | } | |
3982 | } /* get_fdc_version */ | |
3983 | ||
3984 | /* lilo configuration */ | |
3985 | ||
3986 | static void __init floppy_set_flags(int *ints, int param, int param2) | |
3987 | { | |
3988 | int i; | |
3989 | ||
3990 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
3991 | if (param) | |
3992 | default_drive_params[i].params.flags |= param2; | |
3993 | else | |
3994 | default_drive_params[i].params.flags &= ~param2; | |
3995 | } | |
3996 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); | |
3997 | } | |
3998 | ||
3999 | static void __init daring(int *ints, int param, int param2) | |
4000 | { | |
4001 | int i; | |
4002 | ||
4003 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { | |
4004 | if (param) { | |
4005 | default_drive_params[i].params.select_delay = 0; | |
4006 | default_drive_params[i].params.flags |= | |
4007 | FD_SILENT_DCL_CLEAR; | |
4008 | } else { | |
4009 | default_drive_params[i].params.select_delay = | |
4010 | 2 * HZ / 100; | |
4011 | default_drive_params[i].params.flags &= | |
4012 | ~FD_SILENT_DCL_CLEAR; | |
4013 | } | |
4014 | } | |
4015 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); | |
4016 | } | |
4017 | ||
4018 | static void __init set_cmos(int *ints, int dummy, int dummy2) | |
4019 | { | |
4020 | int current_drive = 0; | |
4021 | ||
4022 | if (ints[0] != 2) { | |
4023 | DPRINT("wrong number of parameters for CMOS\n"); | |
4024 | return; | |
4025 | } | |
4026 | current_drive = ints[1]; | |
4027 | if (current_drive < 0 || current_drive >= 8) { | |
4028 | DPRINT("bad drive for set_cmos\n"); | |
4029 | return; | |
4030 | } | |
4031 | #if N_FDC > 1 | |
4032 | if (current_drive >= 4 && !FDC2) | |
4033 | FDC2 = 0x370; | |
4034 | #endif | |
4035 | DP->cmos = ints[2]; | |
4036 | DPRINT("setting CMOS code to %d\n", ints[2]); | |
4037 | } | |
4038 | ||
4039 | static struct param_table { | |
4040 | const char *name; | |
4041 | void (*fn) (int *ints, int param, int param2); | |
4042 | int *var; | |
4043 | int def_param; | |
4044 | int param2; | |
4045 | } config_params[] __initdata = { | |
4046 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4047 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ | |
4048 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, | |
4049 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, | |
4050 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, | |
4051 | {"daring", daring, NULL, 1, 0}, | |
4052 | #if N_FDC > 1 | |
4053 | {"two_fdc", NULL, &FDC2, 0x370, 0}, | |
4054 | {"one_fdc", NULL, &FDC2, 0, 0}, | |
4055 | #endif | |
4056 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, | |
4057 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, | |
4058 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, | |
4059 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, | |
4060 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, | |
4061 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, | |
4062 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, | |
4063 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, | |
4064 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, | |
4065 | {"nofifo", NULL, &no_fifo, 0x20, 0}, | |
4066 | {"usefifo", NULL, &no_fifo, 0, 0}, | |
4067 | {"cmos", set_cmos, NULL, 0, 0}, | |
4068 | {"slow", NULL, &slow_floppy, 1, 0}, | |
4069 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, | |
4070 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, | |
4071 | {"L40SX", NULL, &print_unex, 0, 0} | |
4072 | ||
4073 | EXTRA_FLOPPY_PARAMS | |
4074 | }; | |
4075 | ||
4076 | static int __init floppy_setup(char *str) | |
4077 | { | |
4078 | int i; | |
4079 | int param; | |
4080 | int ints[11]; | |
4081 | ||
4082 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
4083 | if (str) { | |
4084 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { | |
4085 | if (strcmp(str, config_params[i].name) == 0) { | |
4086 | if (ints[0]) | |
4087 | param = ints[1]; | |
4088 | else | |
4089 | param = config_params[i].def_param; | |
4090 | if (config_params[i].fn) | |
bb57f0c6 JP |
4091 | config_params[i].fn(ints, param, |
4092 | config_params[i]. | |
4093 | param2); | |
1da177e4 LT |
4094 | if (config_params[i].var) { |
4095 | DPRINT("%s=%d\n", str, param); | |
4096 | *config_params[i].var = param; | |
4097 | } | |
4098 | return 1; | |
4099 | } | |
4100 | } | |
4101 | } | |
4102 | if (str) { | |
4103 | DPRINT("unknown floppy option [%s]\n", str); | |
4104 | ||
4105 | DPRINT("allowed options are:"); | |
4106 | for (i = 0; i < ARRAY_SIZE(config_params); i++) | |
b46df356 JP |
4107 | pr_cont(" %s", config_params[i].name); |
4108 | pr_cont("\n"); | |
1da177e4 LT |
4109 | } else |
4110 | DPRINT("botched floppy option\n"); | |
31c00fc1 | 4111 | DPRINT("Read Documentation/blockdev/floppy.txt\n"); |
1da177e4 LT |
4112 | return 0; |
4113 | } | |
4114 | ||
4115 | static int have_no_fdc = -ENODEV; | |
4116 | ||
9a8af6b3 AM |
4117 | static ssize_t floppy_cmos_show(struct device *dev, |
4118 | struct device_attribute *attr, char *buf) | |
94fd0db7 | 4119 | { |
71b3e0c1 | 4120 | struct platform_device *p = to_platform_device(dev); |
9a8af6b3 | 4121 | int drive; |
94fd0db7 | 4122 | |
9a8af6b3 AM |
4123 | drive = p->id; |
4124 | return sprintf(buf, "%X\n", UDP->cmos); | |
94fd0db7 | 4125 | } |
48c8cee6 | 4126 | |
be1c0fbf | 4127 | static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); |
94fd0db7 | 4128 | |
1da177e4 LT |
4129 | static void floppy_device_release(struct device *dev) |
4130 | { | |
1da177e4 LT |
4131 | } |
4132 | ||
c90cd332 | 4133 | static int floppy_resume(struct device *dev) |
5e50b9ef OZ |
4134 | { |
4135 | int fdc; | |
4136 | ||
4137 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4138 | if (FDCS->address != -1) | |
74f63f46 | 4139 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
5e50b9ef OZ |
4140 | |
4141 | return 0; | |
4142 | } | |
4143 | ||
47145210 | 4144 | static const struct dev_pm_ops floppy_pm_ops = { |
5e50b9ef | 4145 | .resume = floppy_resume, |
c90cd332 FP |
4146 | .restore = floppy_resume, |
4147 | }; | |
4148 | ||
4149 | static struct platform_driver floppy_driver = { | |
5e50b9ef | 4150 | .driver = { |
bb57f0c6 JP |
4151 | .name = "floppy", |
4152 | .pm = &floppy_pm_ops, | |
5e50b9ef OZ |
4153 | }, |
4154 | }; | |
4155 | ||
94fd0db7 | 4156 | static struct platform_device floppy_device[N_DRIVE]; |
1da177e4 LT |
4157 | |
4158 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) | |
4159 | { | |
4160 | int drive = (*part & 3) | ((*part & 0x80) >> 5); | |
4161 | if (drive >= N_DRIVE || | |
4162 | !(allowed_drive_mask & (1 << drive)) || | |
4163 | fdc_state[FDC(drive)].version == FDC_NONE) | |
4164 | return NULL; | |
945f390f | 4165 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
1da177e4 LT |
4166 | return NULL; |
4167 | *part = 0; | |
4168 | return get_disk(disks[drive]); | |
4169 | } | |
4170 | ||
4171 | static int __init floppy_init(void) | |
4172 | { | |
4173 | int i, unit, drive; | |
4174 | int err, dr; | |
4175 | ||
285203c8 SH |
4176 | set_debugt(); |
4177 | interruptjiffies = resultjiffies = jiffies; | |
4178 | ||
68e1ee62 | 4179 | #if defined(CONFIG_PPC) |
ef16b519 OH |
4180 | if (check_legacy_ioport(FDC1)) |
4181 | return -ENODEV; | |
4182 | #endif | |
4183 | ||
1da177e4 LT |
4184 | raw_cmd = NULL; |
4185 | ||
4186 | for (dr = 0; dr < N_DRIVE; dr++) { | |
4187 | disks[dr] = alloc_disk(1); | |
4188 | if (!disks[dr]) { | |
4189 | err = -ENOMEM; | |
4190 | goto out_put_disk; | |
4191 | } | |
4192 | ||
48821184 JA |
4193 | disks[dr]->queue = blk_init_queue(do_fd_request, &floppy_lock); |
4194 | if (!disks[dr]->queue) { | |
4195 | err = -ENOMEM; | |
4196 | goto out_put_disk; | |
4197 | } | |
4198 | ||
4199 | blk_queue_max_hw_sectors(disks[dr]->queue, 64); | |
1da177e4 LT |
4200 | disks[dr]->major = FLOPPY_MAJOR; |
4201 | disks[dr]->first_minor = TOMINOR(dr); | |
4202 | disks[dr]->fops = &floppy_fops; | |
4203 | sprintf(disks[dr]->disk_name, "fd%d", dr); | |
4204 | ||
4205 | init_timer(&motor_off_timer[dr]); | |
4206 | motor_off_timer[dr].data = dr; | |
4207 | motor_off_timer[dr].function = motor_off_callback; | |
4208 | } | |
4209 | ||
1da177e4 LT |
4210 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4211 | if (err) | |
8ab5e4c1 | 4212 | goto out_put_disk; |
1da177e4 | 4213 | |
5e50b9ef OZ |
4214 | err = platform_driver_register(&floppy_driver); |
4215 | if (err) | |
4216 | goto out_unreg_blkdev; | |
4217 | ||
1da177e4 LT |
4218 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
4219 | floppy_find, NULL, NULL); | |
4220 | ||
4221 | for (i = 0; i < 256; i++) | |
4222 | if (ITYPE(i)) | |
4223 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; | |
4224 | else | |
4225 | floppy_sizes[i] = MAX_DISK_SIZE << 1; | |
4226 | ||
73507e6c | 4227 | reschedule_timeout(MAXTIMEOUT, "floppy init"); |
1da177e4 LT |
4228 | config_types(); |
4229 | ||
4230 | for (i = 0; i < N_FDC; i++) { | |
4231 | fdc = i; | |
b87c9e0a | 4232 | memset(FDCS, 0, sizeof(*FDCS)); |
1da177e4 LT |
4233 | FDCS->dtr = -1; |
4234 | FDCS->dor = 0x4; | |
4235 | #if defined(__sparc__) || defined(__mc68000__) | |
96534f1d | 4236 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ |
1da177e4 LT |
4237 | #ifdef __mc68000__ |
4238 | if (MACH_IS_SUN3X) | |
4239 | #endif | |
4240 | FDCS->version = FDC_82072A; | |
4241 | #endif | |
4242 | } | |
4243 | ||
4244 | use_virtual_dma = can_use_virtual_dma & 1; | |
1da177e4 LT |
4245 | fdc_state[0].address = FDC1; |
4246 | if (fdc_state[0].address == -1) { | |
4247 | del_timer(&fd_timeout); | |
4248 | err = -ENODEV; | |
4249 | goto out_unreg_region; | |
4250 | } | |
4251 | #if N_FDC > 1 | |
4252 | fdc_state[1].address = FDC2; | |
4253 | #endif | |
4254 | ||
4255 | fdc = 0; /* reset fdc in case of unexpected interrupt */ | |
4256 | err = floppy_grab_irq_and_dma(); | |
4257 | if (err) { | |
4258 | del_timer(&fd_timeout); | |
4259 | err = -EBUSY; | |
4260 | goto out_unreg_region; | |
4261 | } | |
4262 | ||
4263 | /* initialise drive state */ | |
4264 | for (drive = 0; drive < N_DRIVE; drive++) { | |
b87c9e0a JP |
4265 | memset(UDRS, 0, sizeof(*UDRS)); |
4266 | memset(UDRWE, 0, sizeof(*UDRWE)); | |
e0298536 JP |
4267 | set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
4268 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); | |
4269 | set_bit(FD_VERIFY_BIT, &UDRS->flags); | |
1da177e4 LT |
4270 | UDRS->fd_device = -1; |
4271 | floppy_track_buffer = NULL; | |
4272 | max_buffer_sectors = 0; | |
4273 | } | |
4274 | /* | |
4275 | * Small 10 msec delay to let through any interrupt that | |
4276 | * initialization might have triggered, to not | |
4277 | * confuse detection: | |
4278 | */ | |
4279 | msleep(10); | |
4280 | ||
4281 | for (i = 0; i < N_FDC; i++) { | |
4282 | fdc = i; | |
4283 | FDCS->driver_version = FD_DRIVER_VERSION; | |
4284 | for (unit = 0; unit < 4; unit++) | |
4285 | FDCS->track[unit] = 0; | |
4286 | if (FDCS->address == -1) | |
4287 | continue; | |
4288 | FDCS->rawcmd = 2; | |
74f63f46 | 4289 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { |
1da177e4 | 4290 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
5a74db06 | 4291 | floppy_release_regions(fdc); |
1da177e4 LT |
4292 | FDCS->address = -1; |
4293 | FDCS->version = FDC_NONE; | |
4294 | continue; | |
4295 | } | |
4296 | /* Try to determine the floppy controller type */ | |
4297 | FDCS->version = get_fdc_version(); | |
4298 | if (FDCS->version == FDC_NONE) { | |
4299 | /* free ioports reserved by floppy_grab_irq_and_dma() */ | |
5a74db06 | 4300 | floppy_release_regions(fdc); |
1da177e4 LT |
4301 | FDCS->address = -1; |
4302 | continue; | |
4303 | } | |
4304 | if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) | |
4305 | can_use_virtual_dma = 0; | |
4306 | ||
4307 | have_no_fdc = 0; | |
4308 | /* Not all FDCs seem to be able to handle the version command | |
4309 | * properly, so force a reset for the standard FDC clones, | |
4310 | * to avoid interrupt garbage. | |
4311 | */ | |
74f63f46 | 4312 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
1da177e4 LT |
4313 | } |
4314 | fdc = 0; | |
4315 | del_timer(&fd_timeout); | |
4316 | current_drive = 0; | |
29f1c784 | 4317 | initialized = true; |
1da177e4 LT |
4318 | if (have_no_fdc) { |
4319 | DPRINT("no floppy controllers found\n"); | |
4320 | err = have_no_fdc; | |
4321 | goto out_flush_work; | |
4322 | } | |
4323 | ||
1da177e4 LT |
4324 | for (drive = 0; drive < N_DRIVE; drive++) { |
4325 | if (!(allowed_drive_mask & (1 << drive))) | |
4326 | continue; | |
4327 | if (fdc_state[FDC(drive)].version == FDC_NONE) | |
4328 | continue; | |
94fd0db7 HR |
4329 | |
4330 | floppy_device[drive].name = floppy_device_name; | |
4331 | floppy_device[drive].id = drive; | |
4332 | floppy_device[drive].dev.release = floppy_device_release; | |
4333 | ||
4334 | err = platform_device_register(&floppy_device[drive]); | |
4335 | if (err) | |
4336 | goto out_flush_work; | |
4337 | ||
d7b2b2ec JP |
4338 | err = device_create_file(&floppy_device[drive].dev, |
4339 | &dev_attr_cmos); | |
4ea1b0f4 DM |
4340 | if (err) |
4341 | goto out_unreg_platform_dev; | |
4342 | ||
1da177e4 LT |
4343 | /* to be cleaned up... */ |
4344 | disks[drive]->private_data = (void *)(long)drive; | |
1da177e4 | 4345 | disks[drive]->flags |= GENHD_FL_REMOVABLE; |
94fd0db7 | 4346 | disks[drive]->driverfs_dev = &floppy_device[drive].dev; |
1da177e4 LT |
4347 | add_disk(disks[drive]); |
4348 | } | |
4349 | ||
4350 | return 0; | |
4351 | ||
4ea1b0f4 DM |
4352 | out_unreg_platform_dev: |
4353 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 LT |
4354 | out_flush_work: |
4355 | flush_scheduled_work(); | |
575cfc67 | 4356 | if (atomic_read(&usage_count)) |
1da177e4 LT |
4357 | floppy_release_irq_and_dma(); |
4358 | out_unreg_region: | |
4359 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); | |
5e50b9ef | 4360 | platform_driver_unregister(&floppy_driver); |
1da177e4 LT |
4361 | out_unreg_blkdev: |
4362 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
1da177e4 LT |
4363 | out_put_disk: |
4364 | while (dr--) { | |
4365 | del_timer(&motor_off_timer[dr]); | |
48821184 JA |
4366 | if (disks[dr]->queue) |
4367 | blk_cleanup_queue(disks[dr]->queue); | |
c093ee4f | 4368 | put_disk(disks[dr]); |
1da177e4 LT |
4369 | } |
4370 | return err; | |
4371 | } | |
4372 | ||
5a74db06 PDM |
4373 | static const struct io_region { |
4374 | int offset; | |
4375 | int size; | |
4376 | } io_regions[] = { | |
4377 | { 2, 1 }, | |
4378 | /* address + 3 is sometimes reserved by pnp bios for motherboard */ | |
4379 | { 4, 2 }, | |
4380 | /* address + 6 is reserved, and may be taken by IDE. | |
4381 | * Unfortunately, Adaptec doesn't know this :-(, */ | |
4382 | { 7, 1 }, | |
4383 | }; | |
4384 | ||
4385 | static void floppy_release_allocated_regions(int fdc, const struct io_region *p) | |
4386 | { | |
4387 | while (p != io_regions) { | |
4388 | p--; | |
4389 | release_region(FDCS->address + p->offset, p->size); | |
4390 | } | |
4391 | } | |
4392 | ||
4393 | #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) | |
4394 | ||
4395 | static int floppy_request_regions(int fdc) | |
4396 | { | |
4397 | const struct io_region *p; | |
4398 | ||
4399 | for (p = io_regions; p < ARRAY_END(io_regions); p++) { | |
bb57f0c6 JP |
4400 | if (!request_region(FDCS->address + p->offset, |
4401 | p->size, "floppy")) { | |
4402 | DPRINT("Floppy io-port 0x%04lx in use\n", | |
4403 | FDCS->address + p->offset); | |
5a74db06 PDM |
4404 | floppy_release_allocated_regions(fdc, p); |
4405 | return -EBUSY; | |
4406 | } | |
4407 | } | |
4408 | return 0; | |
4409 | } | |
4410 | ||
4411 | static void floppy_release_regions(int fdc) | |
4412 | { | |
4413 | floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); | |
4414 | } | |
4415 | ||
1da177e4 LT |
4416 | static int floppy_grab_irq_and_dma(void) |
4417 | { | |
575cfc67 | 4418 | if (atomic_inc_return(&usage_count) > 1) |
1da177e4 | 4419 | return 0; |
6dc659d8 IM |
4420 | |
4421 | /* | |
4422 | * We might have scheduled a free_irq(), wait it to | |
4423 | * drain first: | |
4424 | */ | |
4425 | flush_scheduled_work(); | |
4426 | ||
1da177e4 LT |
4427 | if (fd_request_irq()) { |
4428 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", | |
4429 | FLOPPY_IRQ); | |
575cfc67 | 4430 | atomic_dec(&usage_count); |
1da177e4 LT |
4431 | return -1; |
4432 | } | |
4433 | if (fd_request_dma()) { | |
4434 | DPRINT("Unable to grab DMA%d for the floppy driver\n", | |
4435 | FLOPPY_DMA); | |
2e9c47cd JB |
4436 | if (can_use_virtual_dma & 2) |
4437 | use_virtual_dma = can_use_virtual_dma = 1; | |
4438 | if (!(can_use_virtual_dma & 1)) { | |
4439 | fd_free_irq(); | |
575cfc67 | 4440 | atomic_dec(&usage_count); |
2e9c47cd JB |
4441 | return -1; |
4442 | } | |
1da177e4 LT |
4443 | } |
4444 | ||
4445 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4446 | if (FDCS->address != -1) { | |
5a74db06 PDM |
4447 | if (floppy_request_regions(fdc)) |
4448 | goto cleanup; | |
1da177e4 LT |
4449 | } |
4450 | } | |
4451 | for (fdc = 0; fdc < N_FDC; fdc++) { | |
4452 | if (FDCS->address != -1) { | |
4453 | reset_fdc_info(1); | |
4454 | fd_outb(FDCS->dor, FD_DOR); | |
4455 | } | |
4456 | } | |
4457 | fdc = 0; | |
4458 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ | |
4459 | ||
4460 | for (fdc = 0; fdc < N_FDC; fdc++) | |
4461 | if (FDCS->address != -1) | |
4462 | fd_outb(FDCS->dor, FD_DOR); | |
4463 | /* | |
06f748c4 JJ |
4464 | * The driver will try and free resources and relies on us |
4465 | * to know if they were allocated or not. | |
1da177e4 LT |
4466 | */ |
4467 | fdc = 0; | |
4468 | irqdma_allocated = 1; | |
4469 | return 0; | |
5a74db06 | 4470 | cleanup: |
1da177e4 LT |
4471 | fd_free_irq(); |
4472 | fd_free_dma(); | |
5a74db06 PDM |
4473 | while (--fdc >= 0) |
4474 | floppy_release_regions(fdc); | |
575cfc67 | 4475 | atomic_dec(&usage_count); |
1da177e4 LT |
4476 | return -1; |
4477 | } | |
4478 | ||
4479 | static void floppy_release_irq_and_dma(void) | |
4480 | { | |
4481 | int old_fdc; | |
1da177e4 LT |
4482 | #ifndef __sparc__ |
4483 | int drive; | |
1da177e4 LT |
4484 | #endif |
4485 | long tmpsize; | |
4486 | unsigned long tmpaddr; | |
1da177e4 | 4487 | |
575cfc67 | 4488 | if (!atomic_dec_and_test(&usage_count)) |
1da177e4 | 4489 | return; |
575cfc67 | 4490 | |
1da177e4 LT |
4491 | if (irqdma_allocated) { |
4492 | fd_disable_dma(); | |
4493 | fd_free_dma(); | |
3e541a4a | 4494 | fd_free_irq(); |
1da177e4 LT |
4495 | irqdma_allocated = 0; |
4496 | } | |
4497 | set_dor(0, ~0, 8); | |
4498 | #if N_FDC > 1 | |
4499 | set_dor(1, ~8, 0); | |
4500 | #endif | |
4501 | floppy_enable_hlt(); | |
4502 | ||
4503 | if (floppy_track_buffer && max_buffer_sectors) { | |
4504 | tmpsize = max_buffer_sectors * 1024; | |
4505 | tmpaddr = (unsigned long)floppy_track_buffer; | |
4506 | floppy_track_buffer = NULL; | |
4507 | max_buffer_sectors = 0; | |
4508 | buffer_min = buffer_max = -1; | |
4509 | fd_dma_mem_free(tmpaddr, tmpsize); | |
4510 | } | |
1da177e4 LT |
4511 | #ifndef __sparc__ |
4512 | for (drive = 0; drive < N_FDC * 4; drive++) | |
4513 | if (timer_pending(motor_off_timer + drive)) | |
b46df356 | 4514 | pr_info("motor off timer %d still active\n", drive); |
1da177e4 LT |
4515 | #endif |
4516 | ||
4517 | if (timer_pending(&fd_timeout)) | |
b46df356 | 4518 | pr_info("floppy timer still active:%s\n", timeout_message); |
1da177e4 | 4519 | if (timer_pending(&fd_timer)) |
b46df356 | 4520 | pr_info("auxiliary floppy timer still active\n"); |
365970a1 | 4521 | if (work_pending(&floppy_work)) |
b46df356 | 4522 | pr_info("work still pending\n"); |
1da177e4 LT |
4523 | old_fdc = fdc; |
4524 | for (fdc = 0; fdc < N_FDC; fdc++) | |
5a74db06 PDM |
4525 | if (FDCS->address != -1) |
4526 | floppy_release_regions(fdc); | |
1da177e4 LT |
4527 | fdc = old_fdc; |
4528 | } | |
4529 | ||
4530 | #ifdef MODULE | |
4531 | ||
4532 | static char *floppy; | |
4533 | ||
1da177e4 LT |
4534 | static void __init parse_floppy_cfg_string(char *cfg) |
4535 | { | |
4536 | char *ptr; | |
4537 | ||
4538 | while (*cfg) { | |
bb57f0c6 JP |
4539 | ptr = cfg; |
4540 | while (*cfg && *cfg != ' ' && *cfg != '\t') | |
4541 | cfg++; | |
1da177e4 LT |
4542 | if (*cfg) { |
4543 | *cfg = '\0'; | |
4544 | cfg++; | |
4545 | } | |
4546 | if (*ptr) | |
4547 | floppy_setup(ptr); | |
4548 | } | |
4549 | } | |
4550 | ||
7afea3bc | 4551 | static int __init floppy_module_init(void) |
1da177e4 LT |
4552 | { |
4553 | if (floppy) | |
4554 | parse_floppy_cfg_string(floppy); | |
4555 | return floppy_init(); | |
4556 | } | |
7afea3bc | 4557 | module_init(floppy_module_init); |
1da177e4 | 4558 | |
7afea3bc | 4559 | static void __exit floppy_module_exit(void) |
1da177e4 LT |
4560 | { |
4561 | int drive; | |
4562 | ||
1da177e4 LT |
4563 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4564 | unregister_blkdev(FLOPPY_MAJOR, "fd"); | |
5e50b9ef | 4565 | platform_driver_unregister(&floppy_driver); |
1da177e4 LT |
4566 | |
4567 | for (drive = 0; drive < N_DRIVE; drive++) { | |
4568 | del_timer_sync(&motor_off_timer[drive]); | |
4569 | ||
4570 | if ((allowed_drive_mask & (1 << drive)) && | |
4571 | fdc_state[FDC(drive)].version != FDC_NONE) { | |
4572 | del_gendisk(disks[drive]); | |
94fd0db7 HR |
4573 | device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); |
4574 | platform_device_unregister(&floppy_device[drive]); | |
1da177e4 | 4575 | } |
48821184 | 4576 | blk_cleanup_queue(disks[drive]->queue); |
d017bf6b | 4577 | put_disk(disks[drive]); |
1da177e4 | 4578 | } |
1da177e4 LT |
4579 | |
4580 | del_timer_sync(&fd_timeout); | |
4581 | del_timer_sync(&fd_timer); | |
1da177e4 | 4582 | |
575cfc67 | 4583 | if (atomic_read(&usage_count)) |
1da177e4 LT |
4584 | floppy_release_irq_and_dma(); |
4585 | ||
4586 | /* eject disk, if any */ | |
4587 | fd_eject(0); | |
1da177e4 | 4588 | } |
48c8cee6 | 4589 | |
7afea3bc | 4590 | module_exit(floppy_module_exit); |
1da177e4 LT |
4591 | |
4592 | module_param(floppy, charp, 0); | |
4593 | module_param(FLOPPY_IRQ, int, 0); | |
4594 | module_param(FLOPPY_DMA, int, 0); | |
4595 | MODULE_AUTHOR("Alain L. Knaff"); | |
4596 | MODULE_SUPPORTED_DEVICE("fd"); | |
4597 | MODULE_LICENSE("GPL"); | |
4598 | ||
83f9ef46 SJR |
4599 | /* This doesn't actually get used other than for module information */ |
4600 | static const struct pnp_device_id floppy_pnpids[] = { | |
48c8cee6 JP |
4601 | {"PNP0700", 0}, |
4602 | {} | |
83f9ef46 | 4603 | }; |
48c8cee6 | 4604 | |
83f9ef46 SJR |
4605 | MODULE_DEVICE_TABLE(pnp, floppy_pnpids); |
4606 | ||
1da177e4 LT |
4607 | #else |
4608 | ||
4609 | __setup("floppy=", floppy_setup); | |
4610 | module_init(floppy_init) | |
4611 | #endif | |
4612 | ||
4613 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |