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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 | */ |
8 | |
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 | |
101 | /* |
102 | * 1998/1/21 -- Richard Gooch <rgooch@atnf.csiro.au> -- devfs support |
103 | */ |
104 | |
105 | /* |
106 | * 1998/05/07 -- Russell King -- More portability cleanups; moved definition of |
107 | * interrupt and dma channel to asm/floppy.h. Cleaned up some formatting & |
108 | * use of '0' for NULL. |
109 | */ |
110 | |
111 | /* |
112 | * 1998/06/07 -- Alan Cox -- Merged the 2.0.34 fixes for resource allocation |
113 | * failures. |
114 | */ |
115 | |
116 | /* |
117 | * 1998/09/20 -- David Weinehall -- Added slow-down code for buggy PS/2-drives. |
118 | */ |
119 | |
120 | /* |
121 | * 1999/08/13 -- Paul Slootman -- floppy stopped working on Alpha after 24 |
122 | * days, 6 hours, 32 minutes and 32 seconds (i.e. MAXINT jiffies; ints were |
123 | * being used to store jiffies, which are unsigned longs). |
124 | */ |
125 | |
126 | /* |
127 | * 2000/08/28 -- Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
128 | * - get rid of check_region |
129 | * - s/suser/capable/ |
130 | */ |
131 | |
132 | /* |
133 | * 2001/08/26 -- Paul Gortmaker - fix insmod oops on machines with no |
134 | * floppy controller (lingering task on list after module is gone... boom.) |
135 | */ |
136 | |
137 | /* |
138 | * 2002/02/07 -- Anton Altaparmakov - Fix io ports reservation to correct range |
139 | * (0x3f2-0x3f5, 0x3f7). This fix is a bit of a hack but the proper fix |
140 | * requires many non-obvious changes in arch dependent code. |
141 | */ |
142 | |
143 | /* 2003/07/28 -- Daniele Bellucci <bellucda@tiscali.it>. |
144 | * Better audit of register_blkdev. |
145 | */ |
146 | |
147 | #undef FLOPPY_SILENT_DCL_CLEAR |
148 | |
149 | #define REALLY_SLOW_IO |
150 | |
151 | #define DEBUGT 2 |
152 | |
153 | #define DPRINT(format, args...) \ |
154 | pr_info("floppy%d: " format, current_drive, ##args) |
155 | |
156 | #define DCL_DEBUG /* debug disk change line */ |
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 | |
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> |
175 | #include <linux/fd.h> |
176 | #include <linux/hdreg.h> |
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> |
182 | #include <linux/jiffies.h> |
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> |
189 | #include <linux/platform_device.h> |
190 | #include <linux/mod_devicetable.h> |
191 | #include <linux/mutex.h> |
192 | #include <linux/io.h> |
193 | #include <linux/uaccess.h> |
194 | #include <linux/async.h> |
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 | */ |
201 | static DEFINE_MUTEX(floppy_mutex); |
202 | static int slow_floppy; |
203 | |
204 | #include <asm/dma.h> |
205 | #include <asm/irq.h> |
206 | |
207 | static int FLOPPY_IRQ = 6; |
208 | static int FLOPPY_DMA = 2; |
209 | static int can_use_virtual_dma = 2; |
210 | /* ======= |
211 | * can use virtual DMA: |
212 | * 0 = use of virtual DMA disallowed by config |
213 | * 1 = use of virtual DMA prescribed by config |
214 | * 2 = no virtual DMA preference configured. By default try hard DMA, |
215 | * but fall back on virtual DMA when not enough memory available |
216 | */ |
217 | |
218 | static int use_virtual_dma; |
219 | /* ======= |
220 | * use virtual DMA |
221 | * 0 using hard DMA |
222 | * 1 using virtual DMA |
223 | * This variable is set to virtual when a DMA mem problem arises, and |
224 | * reset back in floppy_grab_irq_and_dma. |
225 | * It is not safe to reset it in other circumstances, because the floppy |
226 | * driver may have several buffers in use at once, and we do currently not |
227 | * record each buffers capabilities |
228 | */ |
229 | |
230 | static DEFINE_SPINLOCK(floppy_lock); |
231 | |
232 | static unsigned short virtual_dma_port = 0x3f0; |
233 | irqreturn_t floppy_interrupt(int irq, void *dev_id); |
234 | static int set_dor(int fdc, char mask, char data); |
235 | |
236 | #define K_64 0x10000 /* 64KB */ |
237 | |
238 | /* the following is the mask of allowed drives. By default units 2 and |
239 | * 3 of both floppy controllers are disabled, because switching on the |
240 | * motor of these drives causes system hangs on some PCI computers. drive |
241 | * 0 is the low bit (0x1), and drive 7 is the high bit (0x80). Bits are on if |
242 | * a drive is allowed. |
243 | * |
244 | * NOTE: This must come before we include the arch floppy header because |
245 | * some ports reference this variable from there. -DaveM |
246 | */ |
247 | |
248 | static int allowed_drive_mask = 0x33; |
249 | |
250 | #include <asm/floppy.h> |
251 | |
252 | static int irqdma_allocated; |
253 | |
254 | #include <linux/blkdev.h> |
255 | #include <linux/blkpg.h> |
256 | #include <linux/cdrom.h> /* for the compatibility eject ioctl */ |
257 | #include <linux/completion.h> |
258 | |
259 | static struct request *current_req; |
260 | static void do_fd_request(struct request_queue *q); |
261 | static int set_next_request(void); |
262 | |
263 | #ifndef fd_get_dma_residue |
264 | #define fd_get_dma_residue() get_dma_residue(FLOPPY_DMA) |
265 | #endif |
266 | |
267 | /* Dma Memory related stuff */ |
268 | |
269 | #ifndef fd_dma_mem_free |
270 | #define fd_dma_mem_free(addr, size) free_pages(addr, get_order(size)) |
271 | #endif |
272 | |
273 | #ifndef fd_dma_mem_alloc |
274 | #define fd_dma_mem_alloc(size) __get_dma_pages(GFP_KERNEL, get_order(size)) |
275 | #endif |
276 | |
277 | static inline void fallback_on_nodma_alloc(char **addr, size_t l) |
278 | { |
279 | #ifdef FLOPPY_CAN_FALLBACK_ON_NODMA |
280 | if (*addr) |
281 | return; /* we have the memory */ |
282 | if (can_use_virtual_dma != 2) |
283 | return; /* no fallback allowed */ |
284 | pr_info("DMA memory shortage. Temporarily falling back on virtual DMA\n"); |
285 | *addr = (char *)nodma_mem_alloc(l); |
286 | #else |
287 | return; |
288 | #endif |
289 | } |
290 | |
291 | /* End dma memory related stuff */ |
292 | |
293 | static unsigned long fake_change; |
294 | static bool initialized; |
295 | |
296 | #define ITYPE(x) (((x) >> 2) & 0x1f) |
297 | #define TOMINOR(x) ((x & 3) | ((x & 4) << 5)) |
298 | #define UNIT(x) ((x) & 0x03) /* drive on fdc */ |
299 | #define FDC(x) (((x) & 0x04) >> 2) /* fdc of drive */ |
300 | /* reverse mapping from unit and fdc to drive */ |
301 | #define REVDRIVE(fdc, unit) ((unit) + ((fdc) << 2)) |
302 | |
303 | #define DP (&drive_params[current_drive]) |
304 | #define DRS (&drive_state[current_drive]) |
305 | #define DRWE (&write_errors[current_drive]) |
306 | #define FDCS (&fdc_state[fdc]) |
307 | |
308 | #define UDP (&drive_params[drive]) |
309 | #define UDRS (&drive_state[drive]) |
310 | #define UDRWE (&write_errors[drive]) |
311 | #define UFDCS (&fdc_state[FDC(drive)]) |
312 | |
313 | #define PH_HEAD(floppy, head) (((((floppy)->stretch & 2) >> 1) ^ head) << 2) |
314 | #define STRETCH(floppy) ((floppy)->stretch & FD_STRETCH) |
315 | |
316 | /* read/write */ |
317 | #define COMMAND (raw_cmd->cmd[0]) |
318 | #define DR_SELECT (raw_cmd->cmd[1]) |
319 | #define TRACK (raw_cmd->cmd[2]) |
320 | #define HEAD (raw_cmd->cmd[3]) |
321 | #define SECTOR (raw_cmd->cmd[4]) |
322 | #define SIZECODE (raw_cmd->cmd[5]) |
323 | #define SECT_PER_TRACK (raw_cmd->cmd[6]) |
324 | #define GAP (raw_cmd->cmd[7]) |
325 | #define SIZECODE2 (raw_cmd->cmd[8]) |
326 | #define NR_RW 9 |
327 | |
328 | /* format */ |
329 | #define F_SIZECODE (raw_cmd->cmd[2]) |
330 | #define F_SECT_PER_TRACK (raw_cmd->cmd[3]) |
331 | #define F_GAP (raw_cmd->cmd[4]) |
332 | #define F_FILL (raw_cmd->cmd[5]) |
333 | #define NR_F 6 |
334 | |
335 | /* |
336 | * Maximum disk size (in kilobytes). |
337 | * This default is used whenever the current disk size is unknown. |
338 | * [Now it is rather a minimum] |
339 | */ |
340 | #define MAX_DISK_SIZE 4 /* 3984 */ |
341 | |
342 | /* |
343 | * globals used by 'result()' |
344 | */ |
345 | #define MAX_REPLIES 16 |
346 | static unsigned char reply_buffer[MAX_REPLIES]; |
347 | static int inr; /* size of reply buffer, when called from interrupt */ |
348 | #define ST0 (reply_buffer[0]) |
349 | #define ST1 (reply_buffer[1]) |
350 | #define ST2 (reply_buffer[2]) |
351 | #define ST3 (reply_buffer[0]) /* result of GETSTATUS */ |
352 | #define R_TRACK (reply_buffer[3]) |
353 | #define R_HEAD (reply_buffer[4]) |
354 | #define R_SECTOR (reply_buffer[5]) |
355 | #define R_SIZECODE (reply_buffer[6]) |
356 | |
357 | #define SEL_DLY (2 * HZ / 100) |
358 | |
359 | /* |
360 | * this struct defines the different floppy drive types. |
361 | */ |
362 | static struct { |
363 | struct floppy_drive_params params; |
364 | const char *name; /* name printed while booting */ |
365 | } default_drive_params[] = { |
366 | /* NOTE: the time values in jiffies should be in msec! |
367 | CMOS drive type |
368 | | Maximum data rate supported by drive type |
369 | | | Head load time, msec |
370 | | | | Head unload time, msec (not used) |
371 | | | | | Step rate interval, usec |
372 | | | | | | Time needed for spinup time (jiffies) |
373 | | | | | | | Timeout for spinning down (jiffies) |
374 | | | | | | | | Spindown offset (where disk stops) |
375 | | | | | | | | | Select delay |
376 | | | | | | | | | | RPS |
377 | | | | | | | | | | | Max number of tracks |
378 | | | | | | | | | | | | Interrupt timeout |
379 | | | | | | | | | | | | | Max nonintlv. sectors |
380 | | | | | | | | | | | | | | -Max Errors- flags */ |
381 | {{0, 500, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 80, 3*HZ, 20, {3,1,2,0,2}, 0, |
382 | 0, { 7, 4, 8, 2, 1, 5, 3,10}, 3*HZ/2, 0 }, "unknown" }, |
383 | |
384 | {{1, 300, 16, 16, 8000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 40, 3*HZ, 17, {3,1,2,0,2}, 0, |
385 | 0, { 1, 0, 0, 0, 0, 0, 0, 0}, 3*HZ/2, 1 }, "360K PC" }, /*5 1/4 360 KB PC*/ |
386 | |
387 | {{2, 500, 16, 16, 6000, 4*HZ/10, 3*HZ, 14, SEL_DLY, 6, 83, 3*HZ, 17, {3,1,2,0,2}, 0, |
388 | 0, { 2, 5, 6,23,10,20,12, 0}, 3*HZ/2, 2 }, "1.2M" }, /*5 1/4 HD AT*/ |
389 | |
390 | {{3, 250, 16, 16, 3000, 1*HZ, 3*HZ, 0, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, |
391 | 0, { 4,22,21,30, 3, 0, 0, 0}, 3*HZ/2, 4 }, "720k" }, /*3 1/2 DD*/ |
392 | |
393 | {{4, 500, 16, 16, 4000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 20, {3,1,2,0,2}, 0, |
394 | 0, { 7, 4,25,22,31,21,29,11}, 3*HZ/2, 7 }, "1.44M" }, /*3 1/2 HD*/ |
395 | |
396 | {{5, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, |
397 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M AMI BIOS" }, /*3 1/2 ED*/ |
398 | |
399 | {{6, 1000, 15, 8, 3000, 4*HZ/10, 3*HZ, 10, SEL_DLY, 5, 83, 3*HZ, 40, {3,1,2,0,2}, 0, |
400 | 0, { 7, 8, 4,25,28,22,31,21}, 3*HZ/2, 8 }, "2.88M" } /*3 1/2 ED*/ |
401 | /* | --autodetected formats--- | | | |
402 | * read_track | | Name printed when booting |
403 | * | Native format |
404 | * Frequency of disk change checks */ |
405 | }; |
406 | |
407 | static struct floppy_drive_params drive_params[N_DRIVE]; |
408 | static struct floppy_drive_struct drive_state[N_DRIVE]; |
409 | static struct floppy_write_errors write_errors[N_DRIVE]; |
410 | static struct timer_list motor_off_timer[N_DRIVE]; |
411 | static struct gendisk *disks[N_DRIVE]; |
412 | static struct block_device *opened_bdev[N_DRIVE]; |
413 | static DEFINE_MUTEX(open_lock); |
414 | static struct floppy_raw_cmd *raw_cmd, default_raw_cmd; |
415 | static int fdc_queue; |
416 | |
417 | /* |
418 | * This struct defines the different floppy types. |
419 | * |
420 | * Bit 0 of 'stretch' tells if the tracks need to be doubled for some |
421 | * types (e.g. 360kB diskette in 1.2MB drive, etc.). Bit 1 of 'stretch' |
422 | * tells if the disk is in Commodore 1581 format, which means side 0 sectors |
423 | * are located on side 1 of the disk but with a side 0 ID, and vice-versa. |
424 | * This is the same as the Sharp MZ-80 5.25" CP/M disk format, except that the |
425 | * 1581's logical side 0 is on physical side 1, whereas the Sharp's logical |
426 | * side 0 is on physical side 0 (but with the misnamed sector IDs). |
427 | * 'stretch' should probably be renamed to something more general, like |
428 | * 'options'. |
429 | * |
430 | * Bits 2 through 9 of 'stretch' tell the number of the first sector. |
431 | * The LSB (bit 2) is flipped. For most disks, the first sector |
432 | * is 1 (represented by 0x00<<2). For some CP/M and music sampler |
433 | * disks (such as Ensoniq EPS 16plus) it is 0 (represented as 0x01<<2). |
434 | * For Amstrad CPC disks it is 0xC1 (represented as 0xC0<<2). |
435 | * |
436 | * Other parameters should be self-explanatory (see also setfdprm(8)). |
437 | */ |
438 | /* |
439 | Size |
440 | | Sectors per track |
441 | | | Head |
442 | | | | Tracks |
443 | | | | | Stretch |
444 | | | | | | Gap 1 size |
445 | | | | | | | Data rate, | 0x40 for perp |
446 | | | | | | | | Spec1 (stepping rate, head unload |
447 | | | | | | | | | /fmt gap (gap2) */ |
448 | static struct floppy_struct floppy_type[32] = { |
449 | { 0, 0,0, 0,0,0x00,0x00,0x00,0x00,NULL }, /* 0 no testing */ |
450 | { 720, 9,2,40,0,0x2A,0x02,0xDF,0x50,"d360" }, /* 1 360KB PC */ |
451 | { 2400,15,2,80,0,0x1B,0x00,0xDF,0x54,"h1200" }, /* 2 1.2MB AT */ |
452 | { 720, 9,1,80,0,0x2A,0x02,0xDF,0x50,"D360" }, /* 3 360KB SS 3.5" */ |
453 | { 1440, 9,2,80,0,0x2A,0x02,0xDF,0x50,"D720" }, /* 4 720KB 3.5" */ |
454 | { 720, 9,2,40,1,0x23,0x01,0xDF,0x50,"h360" }, /* 5 360KB AT */ |
455 | { 1440, 9,2,80,0,0x23,0x01,0xDF,0x50,"h720" }, /* 6 720KB AT */ |
456 | { 2880,18,2,80,0,0x1B,0x00,0xCF,0x6C,"H1440" }, /* 7 1.44MB 3.5" */ |
457 | { 5760,36,2,80,0,0x1B,0x43,0xAF,0x54,"E2880" }, /* 8 2.88MB 3.5" */ |
458 | { 6240,39,2,80,0,0x1B,0x43,0xAF,0x28,"E3120" }, /* 9 3.12MB 3.5" */ |
459 | |
460 | { 2880,18,2,80,0,0x25,0x00,0xDF,0x02,"h1440" }, /* 10 1.44MB 5.25" */ |
461 | { 3360,21,2,80,0,0x1C,0x00,0xCF,0x0C,"H1680" }, /* 11 1.68MB 3.5" */ |
462 | { 820,10,2,41,1,0x25,0x01,0xDF,0x2E,"h410" }, /* 12 410KB 5.25" */ |
463 | { 1640,10,2,82,0,0x25,0x02,0xDF,0x2E,"H820" }, /* 13 820KB 3.5" */ |
464 | { 2952,18,2,82,0,0x25,0x00,0xDF,0x02,"h1476" }, /* 14 1.48MB 5.25" */ |
465 | { 3444,21,2,82,0,0x25,0x00,0xDF,0x0C,"H1722" }, /* 15 1.72MB 3.5" */ |
466 | { 840,10,2,42,1,0x25,0x01,0xDF,0x2E,"h420" }, /* 16 420KB 5.25" */ |
467 | { 1660,10,2,83,0,0x25,0x02,0xDF,0x2E,"H830" }, /* 17 830KB 3.5" */ |
468 | { 2988,18,2,83,0,0x25,0x00,0xDF,0x02,"h1494" }, /* 18 1.49MB 5.25" */ |
469 | { 3486,21,2,83,0,0x25,0x00,0xDF,0x0C,"H1743" }, /* 19 1.74 MB 3.5" */ |
470 | |
471 | { 1760,11,2,80,0,0x1C,0x09,0xCF,0x00,"h880" }, /* 20 880KB 5.25" */ |
472 | { 2080,13,2,80,0,0x1C,0x01,0xCF,0x00,"D1040" }, /* 21 1.04MB 3.5" */ |
473 | { 2240,14,2,80,0,0x1C,0x19,0xCF,0x00,"D1120" }, /* 22 1.12MB 3.5" */ |
474 | { 3200,20,2,80,0,0x1C,0x20,0xCF,0x2C,"h1600" }, /* 23 1.6MB 5.25" */ |
475 | { 3520,22,2,80,0,0x1C,0x08,0xCF,0x2e,"H1760" }, /* 24 1.76MB 3.5" */ |
476 | { 3840,24,2,80,0,0x1C,0x20,0xCF,0x00,"H1920" }, /* 25 1.92MB 3.5" */ |
477 | { 6400,40,2,80,0,0x25,0x5B,0xCF,0x00,"E3200" }, /* 26 3.20MB 3.5" */ |
478 | { 7040,44,2,80,0,0x25,0x5B,0xCF,0x00,"E3520" }, /* 27 3.52MB 3.5" */ |
479 | { 7680,48,2,80,0,0x25,0x63,0xCF,0x00,"E3840" }, /* 28 3.84MB 3.5" */ |
480 | { 3680,23,2,80,0,0x1C,0x10,0xCF,0x00,"H1840" }, /* 29 1.84MB 3.5" */ |
481 | |
482 | { 1600,10,2,80,0,0x25,0x02,0xDF,0x2E,"D800" }, /* 30 800KB 3.5" */ |
483 | { 3200,20,2,80,0,0x1C,0x00,0xCF,0x2C,"H1600" }, /* 31 1.6MB 3.5" */ |
484 | }; |
485 | |
486 | #define SECTSIZE (_FD_SECTSIZE(*floppy)) |
487 | |
488 | /* Auto-detection: Disk type used until the next media change occurs. */ |
489 | static struct floppy_struct *current_type[N_DRIVE]; |
490 | |
491 | /* |
492 | * User-provided type information. current_type points to |
493 | * the respective entry of this array. |
494 | */ |
495 | static struct floppy_struct user_params[N_DRIVE]; |
496 | |
497 | static sector_t floppy_sizes[256]; |
498 | |
499 | static char floppy_device_name[] = "floppy"; |
500 | |
501 | /* |
502 | * The driver is trying to determine the correct media format |
503 | * while probing is set. rw_interrupt() clears it after a |
504 | * successful access. |
505 | */ |
506 | static int probing; |
507 | |
508 | /* Synchronization of FDC access. */ |
509 | #define FD_COMMAND_NONE -1 |
510 | #define FD_COMMAND_ERROR 2 |
511 | #define FD_COMMAND_OKAY 3 |
512 | |
513 | static volatile int command_status = FD_COMMAND_NONE; |
514 | static unsigned long fdc_busy; |
515 | static DECLARE_WAIT_QUEUE_HEAD(fdc_wait); |
516 | static DECLARE_WAIT_QUEUE_HEAD(command_done); |
517 | |
518 | /* Errors during formatting are counted here. */ |
519 | static int format_errors; |
520 | |
521 | /* Format request descriptor. */ |
522 | static struct format_descr format_req; |
523 | |
524 | /* |
525 | * Rate is 0 for 500kb/s, 1 for 300kbps, 2 for 250kbps |
526 | * Spec1 is 0xSH, where S is stepping rate (F=1ms, E=2ms, D=3ms etc), |
527 | * H is head unload time (1=16ms, 2=32ms, etc) |
528 | */ |
529 | |
530 | /* |
531 | * Track buffer |
532 | * Because these are written to by the DMA controller, they must |
533 | * not contain a 64k byte boundary crossing, or data will be |
534 | * corrupted/lost. |
535 | */ |
536 | static char *floppy_track_buffer; |
537 | static int max_buffer_sectors; |
538 | |
539 | static int *errors; |
540 | typedef void (*done_f)(int); |
541 | static const struct cont_t { |
542 | void (*interrupt)(void); |
543 | /* this is called after the interrupt of the |
544 | * main command */ |
545 | void (*redo)(void); /* this is called to retry the operation */ |
546 | void (*error)(void); /* this is called to tally an error */ |
547 | done_f done; /* this is called to say if the operation has |
548 | * succeeded/failed */ |
549 | } *cont; |
550 | |
551 | static void floppy_ready(void); |
552 | static void floppy_start(void); |
553 | static void process_fd_request(void); |
554 | static void recalibrate_floppy(void); |
555 | static void floppy_shutdown(struct work_struct *); |
556 | |
557 | static int floppy_request_regions(int); |
558 | static void floppy_release_regions(int); |
559 | static int floppy_grab_irq_and_dma(void); |
560 | static void floppy_release_irq_and_dma(void); |
561 | |
562 | /* |
563 | * The "reset" variable should be tested whenever an interrupt is scheduled, |
564 | * after the commands have been sent. This is to ensure that the driver doesn't |
565 | * get wedged when the interrupt doesn't come because of a failed command. |
566 | * reset doesn't need to be tested before sending commands, because |
567 | * output_byte is automatically disabled when reset is set. |
568 | */ |
569 | static void reset_fdc(void); |
570 | |
571 | /* |
572 | * These are global variables, as that's the easiest way to give |
573 | * information to interrupts. They are the data used for the current |
574 | * request. |
575 | */ |
576 | #define NO_TRACK -1 |
577 | #define NEED_1_RECAL -2 |
578 | #define NEED_2_RECAL -3 |
579 | |
580 | static atomic_t usage_count = ATOMIC_INIT(0); |
581 | |
582 | /* buffer related variables */ |
583 | static int buffer_track = -1; |
584 | static int buffer_drive = -1; |
585 | static int buffer_min = -1; |
586 | static int buffer_max = -1; |
587 | |
588 | /* fdc related variables, should end up in a struct */ |
589 | static struct floppy_fdc_state fdc_state[N_FDC]; |
590 | static int fdc; /* current fdc */ |
591 | |
592 | static struct workqueue_struct *floppy_wq; |
593 | |
594 | static struct floppy_struct *_floppy = floppy_type; |
595 | static unsigned char current_drive; |
596 | static long current_count_sectors; |
597 | static unsigned char fsector_t; /* sector in track */ |
598 | static unsigned char in_sector_offset; /* offset within physical sector, |
599 | * expressed in units of 512 bytes */ |
600 | |
601 | static inline bool drive_no_geom(int drive) |
602 | { |
603 | return !current_type[drive] && !ITYPE(UDRS->fd_device); |
604 | } |
605 | |
606 | #ifndef fd_eject |
607 | static inline int fd_eject(int drive) |
608 | { |
609 | return -EINVAL; |
610 | } |
611 | #endif |
612 | |
613 | /* |
614 | * Debugging |
615 | * ========= |
616 | */ |
617 | #ifdef DEBUGT |
618 | static long unsigned debugtimer; |
619 | |
620 | static inline void set_debugt(void) |
621 | { |
622 | debugtimer = jiffies; |
623 | } |
624 | |
625 | static inline void debugt(const char *func, const char *msg) |
626 | { |
627 | if (DP->flags & DEBUGT) |
628 | pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer); |
629 | } |
630 | #else |
631 | static inline void set_debugt(void) { } |
632 | static inline void debugt(const char *func, const char *msg) { } |
633 | #endif /* DEBUGT */ |
634 | |
635 | |
636 | static DECLARE_DELAYED_WORK(fd_timeout, floppy_shutdown); |
637 | static const char *timeout_message; |
638 | |
639 | static void is_alive(const char *func, const char *message) |
640 | { |
641 | /* this routine checks whether the floppy driver is "alive" */ |
642 | if (test_bit(0, &fdc_busy) && command_status < 2 && |
643 | !delayed_work_pending(&fd_timeout)) { |
644 | DPRINT("%s: timeout handler died. %s\n", func, message); |
645 | } |
646 | } |
647 | |
648 | static void (*do_floppy)(void) = NULL; |
649 | |
650 | #define OLOGSIZE 20 |
651 | |
652 | static void (*lasthandler)(void); |
653 | static unsigned long interruptjiffies; |
654 | static unsigned long resultjiffies; |
655 | static int resultsize; |
656 | static unsigned long lastredo; |
657 | |
658 | static struct output_log { |
659 | unsigned char data; |
660 | unsigned char status; |
661 | unsigned long jiffies; |
662 | } output_log[OLOGSIZE]; |
663 | |
664 | static int output_log_pos; |
665 | |
666 | #define current_reqD -1 |
667 | #define MAXTIMEOUT -2 |
668 | |
669 | static void __reschedule_timeout(int drive, const char *message) |
670 | { |
671 | unsigned long delay; |
672 | |
673 | if (drive == current_reqD) |
674 | drive = current_drive; |
675 | |
676 | if (drive < 0 || drive >= N_DRIVE) { |
677 | delay = 20UL * HZ; |
678 | drive = 0; |
679 | } else |
680 | delay = UDP->timeout; |
681 | |
682 | mod_delayed_work(floppy_wq, &fd_timeout, delay); |
683 | if (UDP->flags & FD_DEBUG) |
684 | DPRINT("reschedule timeout %s\n", message); |
685 | timeout_message = message; |
686 | } |
687 | |
688 | static void reschedule_timeout(int drive, const char *message) |
689 | { |
690 | unsigned long flags; |
691 | |
692 | spin_lock_irqsave(&floppy_lock, flags); |
693 | __reschedule_timeout(drive, message); |
694 | spin_unlock_irqrestore(&floppy_lock, flags); |
695 | } |
696 | |
697 | #define INFBOUND(a, b) (a) = max_t(int, a, b) |
698 | #define SUPBOUND(a, b) (a) = min_t(int, a, b) |
699 | |
700 | /* |
701 | * Bottom half floppy driver. |
702 | * ========================== |
703 | * |
704 | * This part of the file contains the code talking directly to the hardware, |
705 | * and also the main service loop (seek-configure-spinup-command) |
706 | */ |
707 | |
708 | /* |
709 | * disk change. |
710 | * This routine is responsible for maintaining the FD_DISK_CHANGE flag, |
711 | * and the last_checked date. |
712 | * |
713 | * last_checked is the date of the last check which showed 'no disk change' |
714 | * FD_DISK_CHANGE is set under two conditions: |
715 | * 1. The floppy has been changed after some i/o to that floppy already |
716 | * took place. |
717 | * 2. No floppy disk is in the drive. This is done in order to ensure that |
718 | * requests are quickly flushed in case there is no disk in the drive. It |
719 | * follows that FD_DISK_CHANGE can only be cleared if there is a disk in |
720 | * the drive. |
721 | * |
722 | * For 1., maxblock is observed. Maxblock is 0 if no i/o has taken place yet. |
723 | * For 2., FD_DISK_NEWCHANGE is watched. FD_DISK_NEWCHANGE is cleared on |
724 | * each seek. If a disk is present, the disk change line should also be |
725 | * cleared on each seek. Thus, if FD_DISK_NEWCHANGE is clear, but the disk |
726 | * change line is set, this means either that no disk is in the drive, or |
727 | * that it has been removed since the last seek. |
728 | * |
729 | * This means that we really have a third possibility too: |
730 | * The floppy has been changed after the last seek. |
731 | */ |
732 | |
733 | static int disk_change(int drive) |
734 | { |
735 | int fdc = FDC(drive); |
736 | |
737 | if (time_before(jiffies, UDRS->select_date + UDP->select_delay)) |
738 | DPRINT("WARNING disk change called early\n"); |
739 | if (!(FDCS->dor & (0x10 << UNIT(drive))) || |
740 | (FDCS->dor & 3) != UNIT(drive) || fdc != FDC(drive)) { |
741 | DPRINT("probing disk change on unselected drive\n"); |
742 | DPRINT("drive=%d fdc=%d dor=%x\n", drive, FDC(drive), |
743 | (unsigned int)FDCS->dor); |
744 | } |
745 | |
746 | debug_dcl(UDP->flags, |
747 | "checking disk change line for drive %d\n", drive); |
748 | debug_dcl(UDP->flags, "jiffies=%lu\n", jiffies); |
749 | debug_dcl(UDP->flags, "disk change line=%x\n", fd_inb(FD_DIR) & 0x80); |
750 | debug_dcl(UDP->flags, "flags=%lx\n", UDRS->flags); |
751 | |
752 | if (UDP->flags & FD_BROKEN_DCL) |
753 | return test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
754 | if ((fd_inb(FD_DIR) ^ UDP->flags) & 0x80) { |
755 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
756 | /* verify write protection */ |
757 | |
758 | if (UDRS->maxblock) /* mark it changed */ |
759 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
760 | |
761 | /* invalidate its geometry */ |
762 | if (UDRS->keep_data >= 0) { |
763 | if ((UDP->flags & FTD_MSG) && |
764 | current_type[drive] != NULL) |
765 | DPRINT("Disk type is undefined after disk change\n"); |
766 | current_type[drive] = NULL; |
767 | floppy_sizes[TOMINOR(drive)] = MAX_DISK_SIZE << 1; |
768 | } |
769 | |
770 | return 1; |
771 | } else { |
772 | UDRS->last_checked = jiffies; |
773 | clear_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
774 | } |
775 | return 0; |
776 | } |
777 | |
778 | static inline int is_selected(int dor, int unit) |
779 | { |
780 | return ((dor & (0x10 << unit)) && (dor & 3) == unit); |
781 | } |
782 | |
783 | static bool is_ready_state(int status) |
784 | { |
785 | int state = status & (STATUS_READY | STATUS_DIR | STATUS_DMA); |
786 | return state == STATUS_READY; |
787 | } |
788 | |
789 | static int set_dor(int fdc, char mask, char data) |
790 | { |
791 | unsigned char unit; |
792 | unsigned char drive; |
793 | unsigned char newdor; |
794 | unsigned char olddor; |
795 | |
796 | if (FDCS->address == -1) |
797 | return -1; |
798 | |
799 | olddor = FDCS->dor; |
800 | newdor = (olddor & mask) | data; |
801 | if (newdor != olddor) { |
802 | unit = olddor & 0x3; |
803 | if (is_selected(olddor, unit) && !is_selected(newdor, unit)) { |
804 | drive = REVDRIVE(fdc, unit); |
805 | debug_dcl(UDP->flags, |
806 | "calling disk change from set_dor\n"); |
807 | disk_change(drive); |
808 | } |
809 | FDCS->dor = newdor; |
810 | fd_outb(newdor, FD_DOR); |
811 | |
812 | unit = newdor & 0x3; |
813 | if (!is_selected(olddor, unit) && is_selected(newdor, unit)) { |
814 | drive = REVDRIVE(fdc, unit); |
815 | UDRS->select_date = jiffies; |
816 | } |
817 | } |
818 | return olddor; |
819 | } |
820 | |
821 | static void twaddle(void) |
822 | { |
823 | if (DP->select_delay) |
824 | return; |
825 | fd_outb(FDCS->dor & ~(0x10 << UNIT(current_drive)), FD_DOR); |
826 | fd_outb(FDCS->dor, FD_DOR); |
827 | DRS->select_date = jiffies; |
828 | } |
829 | |
830 | /* |
831 | * Reset all driver information about the current fdc. |
832 | * This is needed after a reset, and after a raw command. |
833 | */ |
834 | static void reset_fdc_info(int mode) |
835 | { |
836 | int drive; |
837 | |
838 | FDCS->spec1 = FDCS->spec2 = -1; |
839 | FDCS->need_configure = 1; |
840 | FDCS->perp_mode = 1; |
841 | FDCS->rawcmd = 0; |
842 | for (drive = 0; drive < N_DRIVE; drive++) |
843 | if (FDC(drive) == fdc && (mode || UDRS->track != NEED_1_RECAL)) |
844 | UDRS->track = NEED_2_RECAL; |
845 | } |
846 | |
847 | /* selects the fdc and drive, and enables the fdc's input/dma. */ |
848 | static void set_fdc(int drive) |
849 | { |
850 | if (drive >= 0 && drive < N_DRIVE) { |
851 | fdc = FDC(drive); |
852 | current_drive = drive; |
853 | } |
854 | if (fdc != 1 && fdc != 0) { |
855 | pr_info("bad fdc value\n"); |
856 | return; |
857 | } |
858 | set_dor(fdc, ~0, 8); |
859 | #if N_FDC > 1 |
860 | set_dor(1 - fdc, ~8, 0); |
861 | #endif |
862 | if (FDCS->rawcmd == 2) |
863 | reset_fdc_info(1); |
864 | if (fd_inb(FD_STATUS) != STATUS_READY) |
865 | FDCS->reset = 1; |
866 | } |
867 | |
868 | /* locks the driver */ |
869 | static int lock_fdc(int drive, bool interruptible) |
870 | { |
871 | if (WARN(atomic_read(&usage_count) == 0, |
872 | "Trying to lock fdc while usage count=0\n")) |
873 | return -1; |
874 | |
875 | if (wait_event_interruptible(fdc_wait, !test_and_set_bit(0, &fdc_busy))) |
876 | return -EINTR; |
877 | |
878 | command_status = FD_COMMAND_NONE; |
879 | |
880 | reschedule_timeout(drive, "lock fdc"); |
881 | set_fdc(drive); |
882 | return 0; |
883 | } |
884 | |
885 | /* unlocks the driver */ |
886 | static void unlock_fdc(void) |
887 | { |
888 | if (!test_bit(0, &fdc_busy)) |
889 | DPRINT("FDC access conflict!\n"); |
890 | |
891 | raw_cmd = NULL; |
892 | command_status = FD_COMMAND_NONE; |
893 | cancel_delayed_work(&fd_timeout); |
894 | do_floppy = NULL; |
895 | cont = NULL; |
896 | clear_bit(0, &fdc_busy); |
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; |
912 | int fdc = FDC(drive); |
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 | { |
938 | int i; |
939 | int drive; |
940 | int saved_drive; |
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 | |
964 | static DECLARE_WORK(floppy_work, NULL); |
965 | |
966 | static void schedule_bh(void (*handler)(void)) |
967 | { |
968 | WARN_ON(work_pending(&floppy_work)); |
969 | |
970 | PREPARE_WORK(&floppy_work, (work_func_t)handler); |
971 | queue_work(floppy_wq, &floppy_work); |
972 | } |
973 | |
974 | static DECLARE_DELAYED_WORK(fd_timer, NULL); |
975 | |
976 | static void cancel_activity(void) |
977 | { |
978 | do_floppy = NULL; |
979 | cancel_delayed_work_sync(&fd_timer); |
980 | cancel_work_sync(&floppy_work); |
981 | } |
982 | |
983 | /* this function makes sure that the disk stays in the drive during the |
984 | * transfer */ |
985 | static void fd_watchdog(struct work_struct *arg) |
986 | { |
987 | debug_dcl(DP->flags, "calling disk change from watchdog\n"); |
988 | |
989 | if (disk_change(current_drive)) { |
990 | DPRINT("disk removed during i/o\n"); |
991 | cancel_activity(); |
992 | cont->done(0); |
993 | reset_fdc(); |
994 | } else { |
995 | cancel_delayed_work(&fd_timer); |
996 | PREPARE_DELAYED_WORK(&fd_timer, fd_watchdog); |
997 | queue_delayed_work(floppy_wq, &fd_timer, HZ / 10); |
998 | } |
999 | } |
1000 | |
1001 | static void main_command_interrupt(void) |
1002 | { |
1003 | cancel_delayed_work(&fd_timer); |
1004 | cont->interrupt(); |
1005 | } |
1006 | |
1007 | /* waits for a delay (spinup or select) to pass */ |
1008 | static int fd_wait_for_completion(unsigned long expires, work_func_t function) |
1009 | { |
1010 | if (FDCS->reset) { |
1011 | reset_fdc(); /* do the reset during sleep to win time |
1012 | * if we don't need to sleep, it's a good |
1013 | * occasion anyways */ |
1014 | return 1; |
1015 | } |
1016 | |
1017 | if (time_before(jiffies, expires)) { |
1018 | cancel_delayed_work(&fd_timer); |
1019 | PREPARE_DELAYED_WORK(&fd_timer, function); |
1020 | queue_delayed_work(floppy_wq, &fd_timer, expires - jiffies); |
1021 | return 1; |
1022 | } |
1023 | return 0; |
1024 | } |
1025 | |
1026 | static void setup_DMA(void) |
1027 | { |
1028 | unsigned long f; |
1029 | |
1030 | if (raw_cmd->length == 0) { |
1031 | int i; |
1032 | |
1033 | pr_info("zero dma transfer size:"); |
1034 | for (i = 0; i < raw_cmd->cmd_count; i++) |
1035 | pr_cont("%x,", raw_cmd->cmd[i]); |
1036 | pr_cont("\n"); |
1037 | cont->done(0); |
1038 | FDCS->reset = 1; |
1039 | return; |
1040 | } |
1041 | if (((unsigned long)raw_cmd->kernel_data) % 512) { |
1042 | pr_info("non aligned address: %p\n", raw_cmd->kernel_data); |
1043 | cont->done(0); |
1044 | FDCS->reset = 1; |
1045 | return; |
1046 | } |
1047 | f = claim_dma_lock(); |
1048 | fd_disable_dma(); |
1049 | #ifdef fd_dma_setup |
1050 | if (fd_dma_setup(raw_cmd->kernel_data, raw_cmd->length, |
1051 | (raw_cmd->flags & FD_RAW_READ) ? |
1052 | DMA_MODE_READ : DMA_MODE_WRITE, FDCS->address) < 0) { |
1053 | release_dma_lock(f); |
1054 | cont->done(0); |
1055 | FDCS->reset = 1; |
1056 | return; |
1057 | } |
1058 | release_dma_lock(f); |
1059 | #else |
1060 | fd_clear_dma_ff(); |
1061 | fd_cacheflush(raw_cmd->kernel_data, raw_cmd->length); |
1062 | fd_set_dma_mode((raw_cmd->flags & FD_RAW_READ) ? |
1063 | DMA_MODE_READ : DMA_MODE_WRITE); |
1064 | fd_set_dma_addr(raw_cmd->kernel_data); |
1065 | fd_set_dma_count(raw_cmd->length); |
1066 | virtual_dma_port = FDCS->address; |
1067 | fd_enable_dma(); |
1068 | release_dma_lock(f); |
1069 | #endif |
1070 | } |
1071 | |
1072 | static void show_floppy(void); |
1073 | |
1074 | /* waits until the fdc becomes ready */ |
1075 | static int wait_til_ready(void) |
1076 | { |
1077 | int status; |
1078 | int counter; |
1079 | |
1080 | if (FDCS->reset) |
1081 | return -1; |
1082 | for (counter = 0; counter < 10000; counter++) { |
1083 | status = fd_inb(FD_STATUS); |
1084 | if (status & STATUS_READY) |
1085 | return status; |
1086 | } |
1087 | if (initialized) { |
1088 | DPRINT("Getstatus times out (%x) on fdc %d\n", status, fdc); |
1089 | show_floppy(); |
1090 | } |
1091 | FDCS->reset = 1; |
1092 | return -1; |
1093 | } |
1094 | |
1095 | /* sends a command byte to the fdc */ |
1096 | static int output_byte(char byte) |
1097 | { |
1098 | int status = wait_til_ready(); |
1099 | |
1100 | if (status < 0) |
1101 | return -1; |
1102 | |
1103 | if (is_ready_state(status)) { |
1104 | fd_outb(byte, FD_DATA); |
1105 | output_log[output_log_pos].data = byte; |
1106 | output_log[output_log_pos].status = status; |
1107 | output_log[output_log_pos].jiffies = jiffies; |
1108 | output_log_pos = (output_log_pos + 1) % OLOGSIZE; |
1109 | return 0; |
1110 | } |
1111 | FDCS->reset = 1; |
1112 | if (initialized) { |
1113 | DPRINT("Unable to send byte %x to FDC. Fdc=%x Status=%x\n", |
1114 | byte, fdc, status); |
1115 | show_floppy(); |
1116 | } |
1117 | return -1; |
1118 | } |
1119 | |
1120 | /* gets the response from the fdc */ |
1121 | static int result(void) |
1122 | { |
1123 | int i; |
1124 | int status = 0; |
1125 | |
1126 | for (i = 0; i < MAX_REPLIES; i++) { |
1127 | status = wait_til_ready(); |
1128 | if (status < 0) |
1129 | break; |
1130 | status &= STATUS_DIR | STATUS_READY | STATUS_BUSY | STATUS_DMA; |
1131 | if ((status & ~STATUS_BUSY) == STATUS_READY) { |
1132 | resultjiffies = jiffies; |
1133 | resultsize = i; |
1134 | return i; |
1135 | } |
1136 | if (status == (STATUS_DIR | STATUS_READY | STATUS_BUSY)) |
1137 | reply_buffer[i] = fd_inb(FD_DATA); |
1138 | else |
1139 | break; |
1140 | } |
1141 | if (initialized) { |
1142 | DPRINT("get result error. Fdc=%d Last status=%x Read bytes=%d\n", |
1143 | fdc, status, i); |
1144 | show_floppy(); |
1145 | } |
1146 | FDCS->reset = 1; |
1147 | return -1; |
1148 | } |
1149 | |
1150 | #define MORE_OUTPUT -2 |
1151 | /* does the fdc need more output? */ |
1152 | static int need_more_output(void) |
1153 | { |
1154 | int status = wait_til_ready(); |
1155 | |
1156 | if (status < 0) |
1157 | return -1; |
1158 | |
1159 | if (is_ready_state(status)) |
1160 | return MORE_OUTPUT; |
1161 | |
1162 | return result(); |
1163 | } |
1164 | |
1165 | /* Set perpendicular mode as required, based on data rate, if supported. |
1166 | * 82077 Now tested. 1Mbps data rate only possible with 82077-1. |
1167 | */ |
1168 | static void perpendicular_mode(void) |
1169 | { |
1170 | unsigned char perp_mode; |
1171 | |
1172 | if (raw_cmd->rate & 0x40) { |
1173 | switch (raw_cmd->rate & 3) { |
1174 | case 0: |
1175 | perp_mode = 2; |
1176 | break; |
1177 | case 3: |
1178 | perp_mode = 3; |
1179 | break; |
1180 | default: |
1181 | DPRINT("Invalid data rate for perpendicular mode!\n"); |
1182 | cont->done(0); |
1183 | FDCS->reset = 1; |
1184 | /* |
1185 | * convenient way to return to |
1186 | * redo without too much hassle |
1187 | * (deep stack et al.) |
1188 | */ |
1189 | return; |
1190 | } |
1191 | } else |
1192 | perp_mode = 0; |
1193 | |
1194 | if (FDCS->perp_mode == perp_mode) |
1195 | return; |
1196 | if (FDCS->version >= FDC_82077_ORIG) { |
1197 | output_byte(FD_PERPENDICULAR); |
1198 | output_byte(perp_mode); |
1199 | FDCS->perp_mode = perp_mode; |
1200 | } else if (perp_mode) { |
1201 | DPRINT("perpendicular mode not supported by this FDC.\n"); |
1202 | } |
1203 | } /* perpendicular_mode */ |
1204 | |
1205 | static int fifo_depth = 0xa; |
1206 | static int no_fifo; |
1207 | |
1208 | static int fdc_configure(void) |
1209 | { |
1210 | /* Turn on FIFO */ |
1211 | output_byte(FD_CONFIGURE); |
1212 | if (need_more_output() != MORE_OUTPUT) |
1213 | return 0; |
1214 | output_byte(0); |
1215 | output_byte(0x10 | (no_fifo & 0x20) | (fifo_depth & 0xf)); |
1216 | output_byte(0); /* pre-compensation from track |
1217 | 0 upwards */ |
1218 | return 1; |
1219 | } |
1220 | |
1221 | #define NOMINAL_DTR 500 |
1222 | |
1223 | /* Issue a "SPECIFY" command to set the step rate time, head unload time, |
1224 | * head load time, and DMA disable flag to values needed by floppy. |
1225 | * |
1226 | * The value "dtr" is the data transfer rate in Kbps. It is needed |
1227 | * to account for the data rate-based scaling done by the 82072 and 82077 |
1228 | * FDC types. This parameter is ignored for other types of FDCs (i.e. |
1229 | * 8272a). |
1230 | * |
1231 | * Note that changing the data transfer rate has a (probably deleterious) |
1232 | * effect on the parameters subject to scaling for 82072/82077 FDCs, so |
1233 | * fdc_specify is called again after each data transfer rate |
1234 | * change. |
1235 | * |
1236 | * srt: 1000 to 16000 in microseconds |
1237 | * hut: 16 to 240 milliseconds |
1238 | * hlt: 2 to 254 milliseconds |
1239 | * |
1240 | * These values are rounded up to the next highest available delay time. |
1241 | */ |
1242 | static void fdc_specify(void) |
1243 | { |
1244 | unsigned char spec1; |
1245 | unsigned char spec2; |
1246 | unsigned long srt; |
1247 | unsigned long hlt; |
1248 | unsigned long hut; |
1249 | unsigned long dtr = NOMINAL_DTR; |
1250 | unsigned long scale_dtr = NOMINAL_DTR; |
1251 | int hlt_max_code = 0x7f; |
1252 | int hut_max_code = 0xf; |
1253 | |
1254 | if (FDCS->need_configure && FDCS->version >= FDC_82072A) { |
1255 | fdc_configure(); |
1256 | FDCS->need_configure = 0; |
1257 | } |
1258 | |
1259 | switch (raw_cmd->rate & 0x03) { |
1260 | case 3: |
1261 | dtr = 1000; |
1262 | break; |
1263 | case 1: |
1264 | dtr = 300; |
1265 | if (FDCS->version >= FDC_82078) { |
1266 | /* chose the default rate table, not the one |
1267 | * where 1 = 2 Mbps */ |
1268 | output_byte(FD_DRIVESPEC); |
1269 | if (need_more_output() == MORE_OUTPUT) { |
1270 | output_byte(UNIT(current_drive)); |
1271 | output_byte(0xc0); |
1272 | } |
1273 | } |
1274 | break; |
1275 | case 2: |
1276 | dtr = 250; |
1277 | break; |
1278 | } |
1279 | |
1280 | if (FDCS->version >= FDC_82072) { |
1281 | scale_dtr = dtr; |
1282 | hlt_max_code = 0x00; /* 0==256msec*dtr0/dtr (not linear!) */ |
1283 | hut_max_code = 0x0; /* 0==256msec*dtr0/dtr (not linear!) */ |
1284 | } |
1285 | |
1286 | /* Convert step rate from microseconds to milliseconds and 4 bits */ |
1287 | srt = 16 - DIV_ROUND_UP(DP->srt * scale_dtr / 1000, NOMINAL_DTR); |
1288 | if (slow_floppy) |
1289 | srt = srt / 4; |
1290 | |
1291 | SUPBOUND(srt, 0xf); |
1292 | INFBOUND(srt, 0); |
1293 | |
1294 | hlt = DIV_ROUND_UP(DP->hlt * scale_dtr / 2, NOMINAL_DTR); |
1295 | if (hlt < 0x01) |
1296 | hlt = 0x01; |
1297 | else if (hlt > 0x7f) |
1298 | hlt = hlt_max_code; |
1299 | |
1300 | hut = DIV_ROUND_UP(DP->hut * scale_dtr / 16, NOMINAL_DTR); |
1301 | if (hut < 0x1) |
1302 | hut = 0x1; |
1303 | else if (hut > 0xf) |
1304 | hut = hut_max_code; |
1305 | |
1306 | spec1 = (srt << 4) | hut; |
1307 | spec2 = (hlt << 1) | (use_virtual_dma & 1); |
1308 | |
1309 | /* If these parameters did not change, just return with success */ |
1310 | if (FDCS->spec1 != spec1 || FDCS->spec2 != spec2) { |
1311 | /* Go ahead and set spec1 and spec2 */ |
1312 | output_byte(FD_SPECIFY); |
1313 | output_byte(FDCS->spec1 = spec1); |
1314 | output_byte(FDCS->spec2 = spec2); |
1315 | } |
1316 | } /* fdc_specify */ |
1317 | |
1318 | /* Set the FDC's data transfer rate on behalf of the specified drive. |
1319 | * NOTE: with 82072/82077 FDCs, changing the data rate requires a reissue |
1320 | * of the specify command (i.e. using the fdc_specify function). |
1321 | */ |
1322 | static int fdc_dtr(void) |
1323 | { |
1324 | /* If data rate not already set to desired value, set it. */ |
1325 | if ((raw_cmd->rate & 3) == FDCS->dtr) |
1326 | return 0; |
1327 | |
1328 | /* Set dtr */ |
1329 | fd_outb(raw_cmd->rate & 3, FD_DCR); |
1330 | |
1331 | /* TODO: some FDC/drive combinations (C&T 82C711 with TEAC 1.2MB) |
1332 | * need a stabilization period of several milliseconds to be |
1333 | * enforced after data rate changes before R/W operations. |
1334 | * Pause 5 msec to avoid trouble. (Needs to be 2 jiffies) |
1335 | */ |
1336 | FDCS->dtr = raw_cmd->rate & 3; |
1337 | return fd_wait_for_completion(jiffies + 2UL * HZ / 100, |
1338 | (work_func_t)floppy_ready); |
1339 | } /* fdc_dtr */ |
1340 | |
1341 | static void tell_sector(void) |
1342 | { |
1343 | pr_cont(": track %d, head %d, sector %d, size %d", |
1344 | R_TRACK, R_HEAD, R_SECTOR, R_SIZECODE); |
1345 | } /* tell_sector */ |
1346 | |
1347 | static void print_errors(void) |
1348 | { |
1349 | DPRINT(""); |
1350 | if (ST0 & ST0_ECE) { |
1351 | pr_cont("Recalibrate failed!"); |
1352 | } else if (ST2 & ST2_CRC) { |
1353 | pr_cont("data CRC error"); |
1354 | tell_sector(); |
1355 | } else if (ST1 & ST1_CRC) { |
1356 | pr_cont("CRC error"); |
1357 | tell_sector(); |
1358 | } else if ((ST1 & (ST1_MAM | ST1_ND)) || |
1359 | (ST2 & ST2_MAM)) { |
1360 | if (!probing) { |
1361 | pr_cont("sector not found"); |
1362 | tell_sector(); |
1363 | } else |
1364 | pr_cont("probe failed..."); |
1365 | } else if (ST2 & ST2_WC) { /* seek error */ |
1366 | pr_cont("wrong cylinder"); |
1367 | } else if (ST2 & ST2_BC) { /* cylinder marked as bad */ |
1368 | pr_cont("bad cylinder"); |
1369 | } else { |
1370 | pr_cont("unknown error. ST[0..2] are: 0x%x 0x%x 0x%x", |
1371 | ST0, ST1, ST2); |
1372 | tell_sector(); |
1373 | } |
1374 | pr_cont("\n"); |
1375 | } |
1376 | |
1377 | /* |
1378 | * OK, this error interpreting routine is called after a |
1379 | * DMA read/write has succeeded |
1380 | * or failed, so we check the results, and copy any buffers. |
1381 | * hhb: Added better error reporting. |
1382 | * ak: Made this into a separate routine. |
1383 | */ |
1384 | static int interpret_errors(void) |
1385 | { |
1386 | char bad; |
1387 | |
1388 | if (inr != 7) { |
1389 | DPRINT("-- FDC reply error\n"); |
1390 | FDCS->reset = 1; |
1391 | return 1; |
1392 | } |
1393 | |
1394 | /* check IC to find cause of interrupt */ |
1395 | switch (ST0 & ST0_INTR) { |
1396 | case 0x40: /* error occurred during command execution */ |
1397 | if (ST1 & ST1_EOC) |
1398 | return 0; /* occurs with pseudo-DMA */ |
1399 | bad = 1; |
1400 | if (ST1 & ST1_WP) { |
1401 | DPRINT("Drive is write protected\n"); |
1402 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1403 | cont->done(0); |
1404 | bad = 2; |
1405 | } else if (ST1 & ST1_ND) { |
1406 | set_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); |
1407 | } else if (ST1 & ST1_OR) { |
1408 | if (DP->flags & FTD_MSG) |
1409 | DPRINT("Over/Underrun - retrying\n"); |
1410 | bad = 0; |
1411 | } else if (*errors >= DP->max_errors.reporting) { |
1412 | print_errors(); |
1413 | } |
1414 | if (ST2 & ST2_WC || ST2 & ST2_BC) |
1415 | /* wrong cylinder => recal */ |
1416 | DRS->track = NEED_2_RECAL; |
1417 | return bad; |
1418 | case 0x80: /* invalid command given */ |
1419 | DPRINT("Invalid FDC command given!\n"); |
1420 | cont->done(0); |
1421 | return 2; |
1422 | case 0xc0: |
1423 | DPRINT("Abnormal termination caused by polling\n"); |
1424 | cont->error(); |
1425 | return 2; |
1426 | default: /* (0) Normal command termination */ |
1427 | return 0; |
1428 | } |
1429 | } |
1430 | |
1431 | /* |
1432 | * This routine is called when everything should be correctly set up |
1433 | * for the transfer (i.e. floppy motor is on, the correct floppy is |
1434 | * selected, and the head is sitting on the right track). |
1435 | */ |
1436 | static void setup_rw_floppy(void) |
1437 | { |
1438 | int i; |
1439 | int r; |
1440 | int flags; |
1441 | int dflags; |
1442 | unsigned long ready_date; |
1443 | work_func_t function; |
1444 | |
1445 | flags = raw_cmd->flags; |
1446 | if (flags & (FD_RAW_READ | FD_RAW_WRITE)) |
1447 | flags |= FD_RAW_INTR; |
1448 | |
1449 | if ((flags & FD_RAW_SPIN) && !(flags & FD_RAW_NO_MOTOR)) { |
1450 | ready_date = DRS->spinup_date + DP->spinup; |
1451 | /* If spinup will take a long time, rerun scandrives |
1452 | * again just before spinup completion. Beware that |
1453 | * after scandrives, we must again wait for selection. |
1454 | */ |
1455 | if (time_after(ready_date, jiffies + DP->select_delay)) { |
1456 | ready_date -= DP->select_delay; |
1457 | function = (work_func_t)floppy_start; |
1458 | } else |
1459 | function = (work_func_t)setup_rw_floppy; |
1460 | |
1461 | /* wait until the floppy is spinning fast enough */ |
1462 | if (fd_wait_for_completion(ready_date, function)) |
1463 | return; |
1464 | } |
1465 | dflags = DRS->flags; |
1466 | |
1467 | if ((flags & FD_RAW_READ) || (flags & FD_RAW_WRITE)) |
1468 | setup_DMA(); |
1469 | |
1470 | if (flags & FD_RAW_INTR) |
1471 | do_floppy = main_command_interrupt; |
1472 | |
1473 | r = 0; |
1474 | for (i = 0; i < raw_cmd->cmd_count; i++) |
1475 | r |= output_byte(raw_cmd->cmd[i]); |
1476 | |
1477 | debugt(__func__, "rw_command"); |
1478 | |
1479 | if (r) { |
1480 | cont->error(); |
1481 | reset_fdc(); |
1482 | return; |
1483 | } |
1484 | |
1485 | if (!(flags & FD_RAW_INTR)) { |
1486 | inr = result(); |
1487 | cont->interrupt(); |
1488 | } else if (flags & FD_RAW_NEED_DISK) |
1489 | fd_watchdog(NULL); |
1490 | } |
1491 | |
1492 | static int blind_seek; |
1493 | |
1494 | /* |
1495 | * This is the routine called after every seek (or recalibrate) interrupt |
1496 | * from the floppy controller. |
1497 | */ |
1498 | static void seek_interrupt(void) |
1499 | { |
1500 | debugt(__func__, ""); |
1501 | if (inr != 2 || (ST0 & 0xF8) != 0x20) { |
1502 | DPRINT("seek failed\n"); |
1503 | DRS->track = NEED_2_RECAL; |
1504 | cont->error(); |
1505 | cont->redo(); |
1506 | return; |
1507 | } |
1508 | if (DRS->track >= 0 && DRS->track != ST1 && !blind_seek) { |
1509 | debug_dcl(DP->flags, |
1510 | "clearing NEWCHANGE flag because of effective seek\n"); |
1511 | debug_dcl(DP->flags, "jiffies=%lu\n", jiffies); |
1512 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1513 | /* effective seek */ |
1514 | DRS->select_date = jiffies; |
1515 | } |
1516 | DRS->track = ST1; |
1517 | floppy_ready(); |
1518 | } |
1519 | |
1520 | static void check_wp(void) |
1521 | { |
1522 | if (test_bit(FD_VERIFY_BIT, &DRS->flags)) { |
1523 | /* check write protection */ |
1524 | output_byte(FD_GETSTATUS); |
1525 | output_byte(UNIT(current_drive)); |
1526 | if (result() != 1) { |
1527 | FDCS->reset = 1; |
1528 | return; |
1529 | } |
1530 | clear_bit(FD_VERIFY_BIT, &DRS->flags); |
1531 | clear_bit(FD_NEED_TWADDLE_BIT, &DRS->flags); |
1532 | debug_dcl(DP->flags, |
1533 | "checking whether disk is write protected\n"); |
1534 | debug_dcl(DP->flags, "wp=%x\n", ST3 & 0x40); |
1535 | if (!(ST3 & 0x40)) |
1536 | set_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1537 | else |
1538 | clear_bit(FD_DISK_WRITABLE_BIT, &DRS->flags); |
1539 | } |
1540 | } |
1541 | |
1542 | static void seek_floppy(void) |
1543 | { |
1544 | int track; |
1545 | |
1546 | blind_seek = 0; |
1547 | |
1548 | debug_dcl(DP->flags, "calling disk change from %s\n", __func__); |
1549 | |
1550 | if (!test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1551 | disk_change(current_drive) && (raw_cmd->flags & FD_RAW_NEED_DISK)) { |
1552 | /* the media changed flag should be cleared after the seek. |
1553 | * If it isn't, this means that there is really no disk in |
1554 | * the drive. |
1555 | */ |
1556 | set_bit(FD_DISK_CHANGED_BIT, &DRS->flags); |
1557 | cont->done(0); |
1558 | cont->redo(); |
1559 | return; |
1560 | } |
1561 | if (DRS->track <= NEED_1_RECAL) { |
1562 | recalibrate_floppy(); |
1563 | return; |
1564 | } else if (test_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags) && |
1565 | (raw_cmd->flags & FD_RAW_NEED_DISK) && |
1566 | (DRS->track <= NO_TRACK || DRS->track == raw_cmd->track)) { |
1567 | /* we seek to clear the media-changed condition. Does anybody |
1568 | * know a more elegant way, which works on all drives? */ |
1569 | if (raw_cmd->track) |
1570 | track = raw_cmd->track - 1; |
1571 | else { |
1572 | if (DP->flags & FD_SILENT_DCL_CLEAR) { |
1573 | set_dor(fdc, ~(0x10 << UNIT(current_drive)), 0); |
1574 | blind_seek = 1; |
1575 | raw_cmd->flags |= FD_RAW_NEED_SEEK; |
1576 | } |
1577 | track = 1; |
1578 | } |
1579 | } else { |
1580 | check_wp(); |
1581 | if (raw_cmd->track != DRS->track && |
1582 | (raw_cmd->flags & FD_RAW_NEED_SEEK)) |
1583 | track = raw_cmd->track; |
1584 | else { |
1585 | setup_rw_floppy(); |
1586 | return; |
1587 | } |
1588 | } |
1589 | |
1590 | do_floppy = seek_interrupt; |
1591 | output_byte(FD_SEEK); |
1592 | output_byte(UNIT(current_drive)); |
1593 | if (output_byte(track) < 0) { |
1594 | reset_fdc(); |
1595 | return; |
1596 | } |
1597 | debugt(__func__, ""); |
1598 | } |
1599 | |
1600 | static void recal_interrupt(void) |
1601 | { |
1602 | debugt(__func__, ""); |
1603 | if (inr != 2) |
1604 | FDCS->reset = 1; |
1605 | else if (ST0 & ST0_ECE) { |
1606 | switch (DRS->track) { |
1607 | case NEED_1_RECAL: |
1608 | debugt(__func__, "need 1 recal"); |
1609 | /* after a second recalibrate, we still haven't |
1610 | * reached track 0. Probably no drive. Raise an |
1611 | * error, as failing immediately might upset |
1612 | * computers possessed by the Devil :-) */ |
1613 | cont->error(); |
1614 | cont->redo(); |
1615 | return; |
1616 | case NEED_2_RECAL: |
1617 | debugt(__func__, "need 2 recal"); |
1618 | /* If we already did a recalibrate, |
1619 | * and we are not at track 0, this |
1620 | * means we have moved. (The only way |
1621 | * not to move at recalibration is to |
1622 | * be already at track 0.) Clear the |
1623 | * new change flag */ |
1624 | debug_dcl(DP->flags, |
1625 | "clearing NEWCHANGE flag because of second recalibrate\n"); |
1626 | |
1627 | clear_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1628 | DRS->select_date = jiffies; |
1629 | /* fall through */ |
1630 | default: |
1631 | debugt(__func__, "default"); |
1632 | /* Recalibrate moves the head by at |
1633 | * most 80 steps. If after one |
1634 | * recalibrate we don't have reached |
1635 | * track 0, this might mean that we |
1636 | * started beyond track 80. Try |
1637 | * again. */ |
1638 | DRS->track = NEED_1_RECAL; |
1639 | break; |
1640 | } |
1641 | } else |
1642 | DRS->track = ST1; |
1643 | floppy_ready(); |
1644 | } |
1645 | |
1646 | static void print_result(char *message, int inr) |
1647 | { |
1648 | int i; |
1649 | |
1650 | DPRINT("%s ", message); |
1651 | if (inr >= 0) |
1652 | for (i = 0; i < inr; i++) |
1653 | pr_cont("repl[%d]=%x ", i, reply_buffer[i]); |
1654 | pr_cont("\n"); |
1655 | } |
1656 | |
1657 | /* interrupt handler. Note that this can be called externally on the Sparc */ |
1658 | irqreturn_t floppy_interrupt(int irq, void *dev_id) |
1659 | { |
1660 | int do_print; |
1661 | unsigned long f; |
1662 | void (*handler)(void) = do_floppy; |
1663 | |
1664 | lasthandler = handler; |
1665 | interruptjiffies = jiffies; |
1666 | |
1667 | f = claim_dma_lock(); |
1668 | fd_disable_dma(); |
1669 | release_dma_lock(f); |
1670 | |
1671 | do_floppy = NULL; |
1672 | if (fdc >= N_FDC || FDCS->address == -1) { |
1673 | /* we don't even know which FDC is the culprit */ |
1674 | pr_info("DOR0=%x\n", fdc_state[0].dor); |
1675 | pr_info("floppy interrupt on bizarre fdc %d\n", fdc); |
1676 | pr_info("handler=%pf\n", handler); |
1677 | is_alive(__func__, "bizarre fdc"); |
1678 | return IRQ_NONE; |
1679 | } |
1680 | |
1681 | FDCS->reset = 0; |
1682 | /* We have to clear the reset flag here, because apparently on boxes |
1683 | * with level triggered interrupts (PS/2, Sparc, ...), it is needed to |
1684 | * emit SENSEI's to clear the interrupt line. And FDCS->reset blocks the |
1685 | * emission of the SENSEI's. |
1686 | * It is OK to emit floppy commands because we are in an interrupt |
1687 | * handler here, and thus we have to fear no interference of other |
1688 | * activity. |
1689 | */ |
1690 | |
1691 | do_print = !handler && print_unex && initialized; |
1692 | |
1693 | inr = result(); |
1694 | if (do_print) |
1695 | print_result("unexpected interrupt", inr); |
1696 | if (inr == 0) { |
1697 | int max_sensei = 4; |
1698 | do { |
1699 | output_byte(FD_SENSEI); |
1700 | inr = result(); |
1701 | if (do_print) |
1702 | print_result("sensei", inr); |
1703 | max_sensei--; |
1704 | } while ((ST0 & 0x83) != UNIT(current_drive) && |
1705 | inr == 2 && max_sensei); |
1706 | } |
1707 | if (!handler) { |
1708 | FDCS->reset = 1; |
1709 | return IRQ_NONE; |
1710 | } |
1711 | schedule_bh(handler); |
1712 | is_alive(__func__, "normal interrupt end"); |
1713 | |
1714 | /* FIXME! Was it really for us? */ |
1715 | return IRQ_HANDLED; |
1716 | } |
1717 | |
1718 | static void recalibrate_floppy(void) |
1719 | { |
1720 | debugt(__func__, ""); |
1721 | do_floppy = recal_interrupt; |
1722 | output_byte(FD_RECALIBRATE); |
1723 | if (output_byte(UNIT(current_drive)) < 0) |
1724 | reset_fdc(); |
1725 | } |
1726 | |
1727 | /* |
1728 | * Must do 4 FD_SENSEIs after reset because of ``drive polling''. |
1729 | */ |
1730 | static void reset_interrupt(void) |
1731 | { |
1732 | debugt(__func__, ""); |
1733 | result(); /* get the status ready for set_fdc */ |
1734 | if (FDCS->reset) { |
1735 | pr_info("reset set in interrupt, calling %pf\n", cont->error); |
1736 | cont->error(); /* a reset just after a reset. BAD! */ |
1737 | } |
1738 | cont->redo(); |
1739 | } |
1740 | |
1741 | /* |
1742 | * reset is done by pulling bit 2 of DOR low for a while (old FDCs), |
1743 | * or by setting the self clearing bit 7 of STATUS (newer FDCs) |
1744 | */ |
1745 | static void reset_fdc(void) |
1746 | { |
1747 | unsigned long flags; |
1748 | |
1749 | do_floppy = reset_interrupt; |
1750 | FDCS->reset = 0; |
1751 | reset_fdc_info(0); |
1752 | |
1753 | /* Pseudo-DMA may intercept 'reset finished' interrupt. */ |
1754 | /* Irrelevant for systems with true DMA (i386). */ |
1755 | |
1756 | flags = claim_dma_lock(); |
1757 | fd_disable_dma(); |
1758 | release_dma_lock(flags); |
1759 | |
1760 | if (FDCS->version >= FDC_82072A) |
1761 | fd_outb(0x80 | (FDCS->dtr & 3), FD_STATUS); |
1762 | else { |
1763 | fd_outb(FDCS->dor & ~0x04, FD_DOR); |
1764 | udelay(FD_RESET_DELAY); |
1765 | fd_outb(FDCS->dor, FD_DOR); |
1766 | } |
1767 | } |
1768 | |
1769 | static void show_floppy(void) |
1770 | { |
1771 | int i; |
1772 | |
1773 | pr_info("\n"); |
1774 | pr_info("floppy driver state\n"); |
1775 | pr_info("-------------------\n"); |
1776 | pr_info("now=%lu last interrupt=%lu diff=%lu last called handler=%pf\n", |
1777 | jiffies, interruptjiffies, jiffies - interruptjiffies, |
1778 | lasthandler); |
1779 | |
1780 | pr_info("timeout_message=%s\n", timeout_message); |
1781 | pr_info("last output bytes:\n"); |
1782 | for (i = 0; i < OLOGSIZE; i++) |
1783 | pr_info("%2x %2x %lu\n", |
1784 | output_log[(i + output_log_pos) % OLOGSIZE].data, |
1785 | output_log[(i + output_log_pos) % OLOGSIZE].status, |
1786 | output_log[(i + output_log_pos) % OLOGSIZE].jiffies); |
1787 | pr_info("last result at %lu\n", resultjiffies); |
1788 | pr_info("last redo_fd_request at %lu\n", lastredo); |
1789 | print_hex_dump(KERN_INFO, "", DUMP_PREFIX_NONE, 16, 1, |
1790 | reply_buffer, resultsize, true); |
1791 | |
1792 | pr_info("status=%x\n", fd_inb(FD_STATUS)); |
1793 | pr_info("fdc_busy=%lu\n", fdc_busy); |
1794 | if (do_floppy) |
1795 | pr_info("do_floppy=%pf\n", do_floppy); |
1796 | if (work_pending(&floppy_work)) |
1797 | pr_info("floppy_work.func=%pf\n", floppy_work.func); |
1798 | if (delayed_work_pending(&fd_timer)) |
1799 | pr_info("delayed work.function=%p expires=%ld\n", |
1800 | fd_timer.work.func, |
1801 | fd_timer.timer.expires - jiffies); |
1802 | if (delayed_work_pending(&fd_timeout)) |
1803 | pr_info("timer_function=%p expires=%ld\n", |
1804 | fd_timeout.work.func, |
1805 | fd_timeout.timer.expires - jiffies); |
1806 | |
1807 | pr_info("cont=%p\n", cont); |
1808 | pr_info("current_req=%p\n", current_req); |
1809 | pr_info("command_status=%d\n", command_status); |
1810 | pr_info("\n"); |
1811 | } |
1812 | |
1813 | static void floppy_shutdown(struct work_struct *arg) |
1814 | { |
1815 | unsigned long flags; |
1816 | |
1817 | if (initialized) |
1818 | show_floppy(); |
1819 | cancel_activity(); |
1820 | |
1821 | flags = claim_dma_lock(); |
1822 | fd_disable_dma(); |
1823 | release_dma_lock(flags); |
1824 | |
1825 | /* avoid dma going to a random drive after shutdown */ |
1826 | |
1827 | if (initialized) |
1828 | DPRINT("floppy timeout called\n"); |
1829 | FDCS->reset = 1; |
1830 | if (cont) { |
1831 | cont->done(0); |
1832 | cont->redo(); /* this will recall reset when needed */ |
1833 | } else { |
1834 | pr_info("no cont in shutdown!\n"); |
1835 | process_fd_request(); |
1836 | } |
1837 | is_alive(__func__, ""); |
1838 | } |
1839 | |
1840 | /* start motor, check media-changed condition and write protection */ |
1841 | static int start_motor(void (*function)(void)) |
1842 | { |
1843 | int mask; |
1844 | int data; |
1845 | |
1846 | mask = 0xfc; |
1847 | data = UNIT(current_drive); |
1848 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR)) { |
1849 | if (!(FDCS->dor & (0x10 << UNIT(current_drive)))) { |
1850 | set_debugt(); |
1851 | /* no read since this drive is running */ |
1852 | DRS->first_read_date = 0; |
1853 | /* note motor start time if motor is not yet running */ |
1854 | DRS->spinup_date = jiffies; |
1855 | data |= (0x10 << UNIT(current_drive)); |
1856 | } |
1857 | } else if (FDCS->dor & (0x10 << UNIT(current_drive))) |
1858 | mask &= ~(0x10 << UNIT(current_drive)); |
1859 | |
1860 | /* starts motor and selects floppy */ |
1861 | del_timer(motor_off_timer + current_drive); |
1862 | set_dor(fdc, mask, data); |
1863 | |
1864 | /* wait_for_completion also schedules reset if needed. */ |
1865 | return fd_wait_for_completion(DRS->select_date + DP->select_delay, |
1866 | (work_func_t)function); |
1867 | } |
1868 | |
1869 | static void floppy_ready(void) |
1870 | { |
1871 | if (FDCS->reset) { |
1872 | reset_fdc(); |
1873 | return; |
1874 | } |
1875 | if (start_motor(floppy_ready)) |
1876 | return; |
1877 | if (fdc_dtr()) |
1878 | return; |
1879 | |
1880 | debug_dcl(DP->flags, "calling disk change from floppy_ready\n"); |
1881 | if (!(raw_cmd->flags & FD_RAW_NO_MOTOR) && |
1882 | disk_change(current_drive) && !DP->select_delay) |
1883 | twaddle(); /* this clears the dcl on certain |
1884 | * drive/controller combinations */ |
1885 | |
1886 | #ifdef fd_chose_dma_mode |
1887 | if ((raw_cmd->flags & FD_RAW_READ) || (raw_cmd->flags & FD_RAW_WRITE)) { |
1888 | unsigned long flags = claim_dma_lock(); |
1889 | fd_chose_dma_mode(raw_cmd->kernel_data, raw_cmd->length); |
1890 | release_dma_lock(flags); |
1891 | } |
1892 | #endif |
1893 | |
1894 | if (raw_cmd->flags & (FD_RAW_NEED_SEEK | FD_RAW_NEED_DISK)) { |
1895 | perpendicular_mode(); |
1896 | fdc_specify(); /* must be done here because of hut, hlt ... */ |
1897 | seek_floppy(); |
1898 | } else { |
1899 | if ((raw_cmd->flags & FD_RAW_READ) || |
1900 | (raw_cmd->flags & FD_RAW_WRITE)) |
1901 | fdc_specify(); |
1902 | setup_rw_floppy(); |
1903 | } |
1904 | } |
1905 | |
1906 | static void floppy_start(void) |
1907 | { |
1908 | reschedule_timeout(current_reqD, "floppy start"); |
1909 | |
1910 | scandrives(); |
1911 | debug_dcl(DP->flags, "setting NEWCHANGE in floppy_start\n"); |
1912 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
1913 | floppy_ready(); |
1914 | } |
1915 | |
1916 | /* |
1917 | * ======================================================================== |
1918 | * here ends the bottom half. Exported routines are: |
1919 | * floppy_start, floppy_off, floppy_ready, lock_fdc, unlock_fdc, set_fdc, |
1920 | * start_motor, reset_fdc, reset_fdc_info, interpret_errors. |
1921 | * Initialization also uses output_byte, result, set_dor, floppy_interrupt |
1922 | * and set_dor. |
1923 | * ======================================================================== |
1924 | */ |
1925 | /* |
1926 | * General purpose continuations. |
1927 | * ============================== |
1928 | */ |
1929 | |
1930 | static void do_wakeup(void) |
1931 | { |
1932 | reschedule_timeout(MAXTIMEOUT, "do wakeup"); |
1933 | cont = NULL; |
1934 | command_status += 2; |
1935 | wake_up(&command_done); |
1936 | } |
1937 | |
1938 | static const struct cont_t wakeup_cont = { |
1939 | .interrupt = empty, |
1940 | .redo = do_wakeup, |
1941 | .error = empty, |
1942 | .done = (done_f)empty |
1943 | }; |
1944 | |
1945 | static const struct cont_t intr_cont = { |
1946 | .interrupt = empty, |
1947 | .redo = process_fd_request, |
1948 | .error = empty, |
1949 | .done = (done_f)empty |
1950 | }; |
1951 | |
1952 | static int wait_til_done(void (*handler)(void), bool interruptible) |
1953 | { |
1954 | int ret; |
1955 | |
1956 | schedule_bh(handler); |
1957 | |
1958 | if (interruptible) |
1959 | wait_event_interruptible(command_done, command_status >= 2); |
1960 | else |
1961 | wait_event(command_done, command_status >= 2); |
1962 | |
1963 | if (command_status < 2) { |
1964 | cancel_activity(); |
1965 | cont = &intr_cont; |
1966 | reset_fdc(); |
1967 | return -EINTR; |
1968 | } |
1969 | |
1970 | if (FDCS->reset) |
1971 | command_status = FD_COMMAND_ERROR; |
1972 | if (command_status == FD_COMMAND_OKAY) |
1973 | ret = 0; |
1974 | else |
1975 | ret = -EIO; |
1976 | command_status = FD_COMMAND_NONE; |
1977 | return ret; |
1978 | } |
1979 | |
1980 | static void generic_done(int result) |
1981 | { |
1982 | command_status = result; |
1983 | cont = &wakeup_cont; |
1984 | } |
1985 | |
1986 | static void generic_success(void) |
1987 | { |
1988 | cont->done(1); |
1989 | } |
1990 | |
1991 | static void generic_failure(void) |
1992 | { |
1993 | cont->done(0); |
1994 | } |
1995 | |
1996 | static void success_and_wakeup(void) |
1997 | { |
1998 | generic_success(); |
1999 | cont->redo(); |
2000 | } |
2001 | |
2002 | /* |
2003 | * formatting and rw support. |
2004 | * ========================== |
2005 | */ |
2006 | |
2007 | static int next_valid_format(void) |
2008 | { |
2009 | int probed_format; |
2010 | |
2011 | probed_format = DRS->probed_format; |
2012 | while (1) { |
2013 | if (probed_format >= 8 || !DP->autodetect[probed_format]) { |
2014 | DRS->probed_format = 0; |
2015 | return 1; |
2016 | } |
2017 | if (floppy_type[DP->autodetect[probed_format]].sect) { |
2018 | DRS->probed_format = probed_format; |
2019 | return 0; |
2020 | } |
2021 | probed_format++; |
2022 | } |
2023 | } |
2024 | |
2025 | static void bad_flp_intr(void) |
2026 | { |
2027 | int err_count; |
2028 | |
2029 | if (probing) { |
2030 | DRS->probed_format++; |
2031 | if (!next_valid_format()) |
2032 | return; |
2033 | } |
2034 | err_count = ++(*errors); |
2035 | INFBOUND(DRWE->badness, err_count); |
2036 | if (err_count > DP->max_errors.abort) |
2037 | cont->done(0); |
2038 | if (err_count > DP->max_errors.reset) |
2039 | FDCS->reset = 1; |
2040 | else if (err_count > DP->max_errors.recal) |
2041 | DRS->track = NEED_2_RECAL; |
2042 | } |
2043 | |
2044 | static void set_floppy(int drive) |
2045 | { |
2046 | int type = ITYPE(UDRS->fd_device); |
2047 | |
2048 | if (type) |
2049 | _floppy = floppy_type + type; |
2050 | else |
2051 | _floppy = current_type[drive]; |
2052 | } |
2053 | |
2054 | /* |
2055 | * formatting support. |
2056 | * =================== |
2057 | */ |
2058 | static void format_interrupt(void) |
2059 | { |
2060 | switch (interpret_errors()) { |
2061 | case 1: |
2062 | cont->error(); |
2063 | case 2: |
2064 | break; |
2065 | case 0: |
2066 | cont->done(1); |
2067 | } |
2068 | cont->redo(); |
2069 | } |
2070 | |
2071 | #define FM_MODE(x, y) ((y) & ~(((x)->rate & 0x80) >> 1)) |
2072 | #define CT(x) ((x) | 0xc0) |
2073 | |
2074 | static void setup_format_params(int track) |
2075 | { |
2076 | int n; |
2077 | int il; |
2078 | int count; |
2079 | int head_shift; |
2080 | int track_shift; |
2081 | struct fparm { |
2082 | unsigned char track, head, sect, size; |
2083 | } *here = (struct fparm *)floppy_track_buffer; |
2084 | |
2085 | raw_cmd = &default_raw_cmd; |
2086 | raw_cmd->track = track; |
2087 | |
2088 | raw_cmd->flags = (FD_RAW_WRITE | FD_RAW_INTR | FD_RAW_SPIN | |
2089 | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK); |
2090 | raw_cmd->rate = _floppy->rate & 0x43; |
2091 | raw_cmd->cmd_count = NR_F; |
2092 | COMMAND = FM_MODE(_floppy, FD_FORMAT); |
2093 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, format_req.head); |
2094 | F_SIZECODE = FD_SIZECODE(_floppy); |
2095 | F_SECT_PER_TRACK = _floppy->sect << 2 >> F_SIZECODE; |
2096 | F_GAP = _floppy->fmt_gap; |
2097 | F_FILL = FD_FILL_BYTE; |
2098 | |
2099 | raw_cmd->kernel_data = floppy_track_buffer; |
2100 | raw_cmd->length = 4 * F_SECT_PER_TRACK; |
2101 | |
2102 | /* allow for about 30ms for data transport per track */ |
2103 | head_shift = (F_SECT_PER_TRACK + 5) / 6; |
2104 | |
2105 | /* a ``cylinder'' is two tracks plus a little stepping time */ |
2106 | track_shift = 2 * head_shift + 3; |
2107 | |
2108 | /* position of logical sector 1 on this track */ |
2109 | n = (track_shift * format_req.track + head_shift * format_req.head) |
2110 | % F_SECT_PER_TRACK; |
2111 | |
2112 | /* determine interleave */ |
2113 | il = 1; |
2114 | if (_floppy->fmt_gap < 0x22) |
2115 | il++; |
2116 | |
2117 | /* initialize field */ |
2118 | for (count = 0; count < F_SECT_PER_TRACK; ++count) { |
2119 | here[count].track = format_req.track; |
2120 | here[count].head = format_req.head; |
2121 | here[count].sect = 0; |
2122 | here[count].size = F_SIZECODE; |
2123 | } |
2124 | /* place logical sectors */ |
2125 | for (count = 1; count <= F_SECT_PER_TRACK; ++count) { |
2126 | here[n].sect = count; |
2127 | n = (n + il) % F_SECT_PER_TRACK; |
2128 | if (here[n].sect) { /* sector busy, find next free sector */ |
2129 | ++n; |
2130 | if (n >= F_SECT_PER_TRACK) { |
2131 | n -= F_SECT_PER_TRACK; |
2132 | while (here[n].sect) |
2133 | ++n; |
2134 | } |
2135 | } |
2136 | } |
2137 | if (_floppy->stretch & FD_SECTBASEMASK) { |
2138 | for (count = 0; count < F_SECT_PER_TRACK; count++) |
2139 | here[count].sect += FD_SECTBASE(_floppy) - 1; |
2140 | } |
2141 | } |
2142 | |
2143 | static void redo_format(void) |
2144 | { |
2145 | buffer_track = -1; |
2146 | setup_format_params(format_req.track << STRETCH(_floppy)); |
2147 | floppy_start(); |
2148 | debugt(__func__, "queue format request"); |
2149 | } |
2150 | |
2151 | static const struct cont_t format_cont = { |
2152 | .interrupt = format_interrupt, |
2153 | .redo = redo_format, |
2154 | .error = bad_flp_intr, |
2155 | .done = generic_done |
2156 | }; |
2157 | |
2158 | static int do_format(int drive, struct format_descr *tmp_format_req) |
2159 | { |
2160 | int ret; |
2161 | |
2162 | if (lock_fdc(drive, true)) |
2163 | return -EINTR; |
2164 | |
2165 | set_floppy(drive); |
2166 | if (!_floppy || |
2167 | _floppy->track > DP->tracks || |
2168 | tmp_format_req->track >= _floppy->track || |
2169 | tmp_format_req->head >= _floppy->head || |
2170 | (_floppy->sect << 2) % (1 << FD_SIZECODE(_floppy)) || |
2171 | !_floppy->fmt_gap) { |
2172 | process_fd_request(); |
2173 | return -EINVAL; |
2174 | } |
2175 | format_req = *tmp_format_req; |
2176 | format_errors = 0; |
2177 | cont = &format_cont; |
2178 | errors = &format_errors; |
2179 | ret = wait_til_done(redo_format, true); |
2180 | if (ret == -EINTR) |
2181 | return -EINTR; |
2182 | process_fd_request(); |
2183 | return ret; |
2184 | } |
2185 | |
2186 | /* |
2187 | * Buffer read/write and support |
2188 | * ============================= |
2189 | */ |
2190 | |
2191 | static void floppy_end_request(struct request *req, int error) |
2192 | { |
2193 | unsigned int nr_sectors = current_count_sectors; |
2194 | unsigned int drive = (unsigned long)req->rq_disk->private_data; |
2195 | |
2196 | /* current_count_sectors can be zero if transfer failed */ |
2197 | if (error) |
2198 | nr_sectors = blk_rq_cur_sectors(req); |
2199 | if (__blk_end_request(req, error, nr_sectors << 9)) |
2200 | return; |
2201 | |
2202 | /* We're done with the request */ |
2203 | floppy_off(drive); |
2204 | current_req = NULL; |
2205 | } |
2206 | |
2207 | /* new request_done. Can handle physical sectors which are smaller than a |
2208 | * logical buffer */ |
2209 | static void request_done(int uptodate) |
2210 | { |
2211 | struct request *req = current_req; |
2212 | struct request_queue *q; |
2213 | unsigned long flags; |
2214 | int block; |
2215 | char msg[sizeof("request done ") + sizeof(int) * 3]; |
2216 | |
2217 | probing = 0; |
2218 | snprintf(msg, sizeof(msg), "request done %d", uptodate); |
2219 | reschedule_timeout(MAXTIMEOUT, msg); |
2220 | |
2221 | if (!req) { |
2222 | pr_info("floppy.c: no request in request_done\n"); |
2223 | return; |
2224 | } |
2225 | |
2226 | q = req->q; |
2227 | |
2228 | if (uptodate) { |
2229 | /* maintain values for invalidation on geometry |
2230 | * change */ |
2231 | block = current_count_sectors + blk_rq_pos(req); |
2232 | INFBOUND(DRS->maxblock, block); |
2233 | if (block > _floppy->sect) |
2234 | DRS->maxtrack = 1; |
2235 | |
2236 | /* unlock chained buffers */ |
2237 | spin_lock_irqsave(q->queue_lock, flags); |
2238 | floppy_end_request(req, 0); |
2239 | spin_unlock_irqrestore(q->queue_lock, flags); |
2240 | } else { |
2241 | if (rq_data_dir(req) == WRITE) { |
2242 | /* record write error information */ |
2243 | DRWE->write_errors++; |
2244 | if (DRWE->write_errors == 1) { |
2245 | DRWE->first_error_sector = blk_rq_pos(req); |
2246 | DRWE->first_error_generation = DRS->generation; |
2247 | } |
2248 | DRWE->last_error_sector = blk_rq_pos(req); |
2249 | DRWE->last_error_generation = DRS->generation; |
2250 | } |
2251 | spin_lock_irqsave(q->queue_lock, flags); |
2252 | floppy_end_request(req, -EIO); |
2253 | spin_unlock_irqrestore(q->queue_lock, flags); |
2254 | } |
2255 | } |
2256 | |
2257 | /* Interrupt handler evaluating the result of the r/w operation */ |
2258 | static void rw_interrupt(void) |
2259 | { |
2260 | int eoc; |
2261 | int ssize; |
2262 | int heads; |
2263 | int nr_sectors; |
2264 | |
2265 | if (R_HEAD >= 2) { |
2266 | /* some Toshiba floppy controllers occasionnally seem to |
2267 | * return bogus interrupts after read/write operations, which |
2268 | * can be recognized by a bad head number (>= 2) */ |
2269 | return; |
2270 | } |
2271 | |
2272 | if (!DRS->first_read_date) |
2273 | DRS->first_read_date = jiffies; |
2274 | |
2275 | nr_sectors = 0; |
2276 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
2277 | |
2278 | if (ST1 & ST1_EOC) |
2279 | eoc = 1; |
2280 | else |
2281 | eoc = 0; |
2282 | |
2283 | if (COMMAND & 0x80) |
2284 | heads = 2; |
2285 | else |
2286 | heads = 1; |
2287 | |
2288 | nr_sectors = (((R_TRACK - TRACK) * heads + |
2289 | R_HEAD - HEAD) * SECT_PER_TRACK + |
2290 | R_SECTOR - SECTOR + eoc) << SIZECODE >> 2; |
2291 | |
2292 | if (nr_sectors / ssize > |
2293 | DIV_ROUND_UP(in_sector_offset + current_count_sectors, ssize)) { |
2294 | DPRINT("long rw: %x instead of %lx\n", |
2295 | nr_sectors, current_count_sectors); |
2296 | pr_info("rs=%d s=%d\n", R_SECTOR, SECTOR); |
2297 | pr_info("rh=%d h=%d\n", R_HEAD, HEAD); |
2298 | pr_info("rt=%d t=%d\n", R_TRACK, TRACK); |
2299 | pr_info("heads=%d eoc=%d\n", heads, eoc); |
2300 | pr_info("spt=%d st=%d ss=%d\n", |
2301 | SECT_PER_TRACK, fsector_t, ssize); |
2302 | pr_info("in_sector_offset=%d\n", in_sector_offset); |
2303 | } |
2304 | |
2305 | nr_sectors -= in_sector_offset; |
2306 | INFBOUND(nr_sectors, 0); |
2307 | SUPBOUND(current_count_sectors, nr_sectors); |
2308 | |
2309 | switch (interpret_errors()) { |
2310 | case 2: |
2311 | cont->redo(); |
2312 | return; |
2313 | case 1: |
2314 | if (!current_count_sectors) { |
2315 | cont->error(); |
2316 | cont->redo(); |
2317 | return; |
2318 | } |
2319 | break; |
2320 | case 0: |
2321 | if (!current_count_sectors) { |
2322 | cont->redo(); |
2323 | return; |
2324 | } |
2325 | current_type[current_drive] = _floppy; |
2326 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; |
2327 | break; |
2328 | } |
2329 | |
2330 | if (probing) { |
2331 | if (DP->flags & FTD_MSG) |
2332 | DPRINT("Auto-detected floppy type %s in fd%d\n", |
2333 | _floppy->name, current_drive); |
2334 | current_type[current_drive] = _floppy; |
2335 | floppy_sizes[TOMINOR(current_drive)] = _floppy->size; |
2336 | probing = 0; |
2337 | } |
2338 | |
2339 | if (CT(COMMAND) != FD_READ || |
2340 | raw_cmd->kernel_data == current_req->buffer) { |
2341 | /* transfer directly from buffer */ |
2342 | cont->done(1); |
2343 | } else if (CT(COMMAND) == FD_READ) { |
2344 | buffer_track = raw_cmd->track; |
2345 | buffer_drive = current_drive; |
2346 | INFBOUND(buffer_max, nr_sectors + fsector_t); |
2347 | } |
2348 | cont->redo(); |
2349 | } |
2350 | |
2351 | /* Compute maximal contiguous buffer size. */ |
2352 | static int buffer_chain_size(void) |
2353 | { |
2354 | struct bio_vec *bv; |
2355 | int size; |
2356 | struct req_iterator iter; |
2357 | char *base; |
2358 | |
2359 | base = bio_data(current_req->bio); |
2360 | size = 0; |
2361 | |
2362 | rq_for_each_segment(bv, current_req, iter) { |
2363 | if (page_address(bv->bv_page) + bv->bv_offset != base + size) |
2364 | break; |
2365 | |
2366 | size += bv->bv_len; |
2367 | } |
2368 | |
2369 | return size >> 9; |
2370 | } |
2371 | |
2372 | /* Compute the maximal transfer size */ |
2373 | static int transfer_size(int ssize, int max_sector, int max_size) |
2374 | { |
2375 | SUPBOUND(max_sector, fsector_t + max_size); |
2376 | |
2377 | /* alignment */ |
2378 | max_sector -= (max_sector % _floppy->sect) % ssize; |
2379 | |
2380 | /* transfer size, beginning not aligned */ |
2381 | current_count_sectors = max_sector - fsector_t; |
2382 | |
2383 | return max_sector; |
2384 | } |
2385 | |
2386 | /* |
2387 | * Move data from/to the track buffer to/from the buffer cache. |
2388 | */ |
2389 | static void copy_buffer(int ssize, int max_sector, int max_sector_2) |
2390 | { |
2391 | int remaining; /* number of transferred 512-byte sectors */ |
2392 | struct bio_vec *bv; |
2393 | char *buffer; |
2394 | char *dma_buffer; |
2395 | int size; |
2396 | struct req_iterator iter; |
2397 | |
2398 | max_sector = transfer_size(ssize, |
2399 | min(max_sector, max_sector_2), |
2400 | blk_rq_sectors(current_req)); |
2401 | |
2402 | if (current_count_sectors <= 0 && CT(COMMAND) == FD_WRITE && |
2403 | buffer_max > fsector_t + blk_rq_sectors(current_req)) |
2404 | current_count_sectors = min_t(int, buffer_max - fsector_t, |
2405 | blk_rq_sectors(current_req)); |
2406 | |
2407 | remaining = current_count_sectors << 9; |
2408 | if (remaining > blk_rq_bytes(current_req) && CT(COMMAND) == FD_WRITE) { |
2409 | DPRINT("in copy buffer\n"); |
2410 | pr_info("current_count_sectors=%ld\n", current_count_sectors); |
2411 | pr_info("remaining=%d\n", remaining >> 9); |
2412 | pr_info("current_req->nr_sectors=%u\n", |
2413 | blk_rq_sectors(current_req)); |
2414 | pr_info("current_req->current_nr_sectors=%u\n", |
2415 | blk_rq_cur_sectors(current_req)); |
2416 | pr_info("max_sector=%d\n", max_sector); |
2417 | pr_info("ssize=%d\n", ssize); |
2418 | } |
2419 | |
2420 | buffer_max = max(max_sector, buffer_max); |
2421 | |
2422 | dma_buffer = floppy_track_buffer + ((fsector_t - buffer_min) << 9); |
2423 | |
2424 | size = blk_rq_cur_bytes(current_req); |
2425 | |
2426 | rq_for_each_segment(bv, current_req, iter) { |
2427 | if (!remaining) |
2428 | break; |
2429 | |
2430 | size = bv->bv_len; |
2431 | SUPBOUND(size, remaining); |
2432 | |
2433 | buffer = page_address(bv->bv_page) + bv->bv_offset; |
2434 | if (dma_buffer + size > |
2435 | floppy_track_buffer + (max_buffer_sectors << 10) || |
2436 | dma_buffer < floppy_track_buffer) { |
2437 | DPRINT("buffer overrun in copy buffer %d\n", |
2438 | (int)((floppy_track_buffer - dma_buffer) >> 9)); |
2439 | pr_info("fsector_t=%d buffer_min=%d\n", |
2440 | fsector_t, buffer_min); |
2441 | pr_info("current_count_sectors=%ld\n", |
2442 | current_count_sectors); |
2443 | if (CT(COMMAND) == FD_READ) |
2444 | pr_info("read\n"); |
2445 | if (CT(COMMAND) == FD_WRITE) |
2446 | pr_info("write\n"); |
2447 | break; |
2448 | } |
2449 | if (((unsigned long)buffer) % 512) |
2450 | DPRINT("%p buffer not aligned\n", buffer); |
2451 | |
2452 | if (CT(COMMAND) == FD_READ) |
2453 | memcpy(buffer, dma_buffer, size); |
2454 | else |
2455 | memcpy(dma_buffer, buffer, size); |
2456 | |
2457 | remaining -= size; |
2458 | dma_buffer += size; |
2459 | } |
2460 | if (remaining) { |
2461 | if (remaining > 0) |
2462 | max_sector -= remaining >> 9; |
2463 | DPRINT("weirdness: remaining %d\n", remaining >> 9); |
2464 | } |
2465 | } |
2466 | |
2467 | /* work around a bug in pseudo DMA |
2468 | * (on some FDCs) pseudo DMA does not stop when the CPU stops |
2469 | * sending data. Hence we need a different way to signal the |
2470 | * transfer length: We use SECT_PER_TRACK. Unfortunately, this |
2471 | * does not work with MT, hence we can only transfer one head at |
2472 | * a time |
2473 | */ |
2474 | static void virtualdmabug_workaround(void) |
2475 | { |
2476 | int hard_sectors; |
2477 | int end_sector; |
2478 | |
2479 | if (CT(COMMAND) == FD_WRITE) { |
2480 | COMMAND &= ~0x80; /* switch off multiple track mode */ |
2481 | |
2482 | hard_sectors = raw_cmd->length >> (7 + SIZECODE); |
2483 | end_sector = SECTOR + hard_sectors - 1; |
2484 | if (end_sector > SECT_PER_TRACK) { |
2485 | pr_info("too many sectors %d > %d\n", |
2486 | end_sector, SECT_PER_TRACK); |
2487 | return; |
2488 | } |
2489 | SECT_PER_TRACK = end_sector; |
2490 | /* make sure SECT_PER_TRACK |
2491 | * points to end of transfer */ |
2492 | } |
2493 | } |
2494 | |
2495 | /* |
2496 | * Formulate a read/write request. |
2497 | * this routine decides where to load the data (directly to buffer, or to |
2498 | * tmp floppy area), how much data to load (the size of the buffer, the whole |
2499 | * track, or a single sector) |
2500 | * All floppy_track_buffer handling goes in here. If we ever add track buffer |
2501 | * allocation on the fly, it should be done here. No other part should need |
2502 | * modification. |
2503 | */ |
2504 | |
2505 | static int make_raw_rw_request(void) |
2506 | { |
2507 | int aligned_sector_t; |
2508 | int max_sector; |
2509 | int max_size; |
2510 | int tracksize; |
2511 | int ssize; |
2512 | |
2513 | if (WARN(max_buffer_sectors == 0, "VFS: Block I/O scheduled on unopened device\n")) |
2514 | return 0; |
2515 | |
2516 | set_fdc((long)current_req->rq_disk->private_data); |
2517 | |
2518 | raw_cmd = &default_raw_cmd; |
2519 | raw_cmd->flags = FD_RAW_SPIN | FD_RAW_NEED_DISK | FD_RAW_NEED_SEEK; |
2520 | raw_cmd->cmd_count = NR_RW; |
2521 | if (rq_data_dir(current_req) == READ) { |
2522 | raw_cmd->flags |= FD_RAW_READ; |
2523 | COMMAND = FM_MODE(_floppy, FD_READ); |
2524 | } else if (rq_data_dir(current_req) == WRITE) { |
2525 | raw_cmd->flags |= FD_RAW_WRITE; |
2526 | COMMAND = FM_MODE(_floppy, FD_WRITE); |
2527 | } else { |
2528 | DPRINT("%s: unknown command\n", __func__); |
2529 | return 0; |
2530 | } |
2531 | |
2532 | max_sector = _floppy->sect * _floppy->head; |
2533 | |
2534 | TRACK = (int)blk_rq_pos(current_req) / max_sector; |
2535 | fsector_t = (int)blk_rq_pos(current_req) % max_sector; |
2536 | if (_floppy->track && TRACK >= _floppy->track) { |
2537 | if (blk_rq_cur_sectors(current_req) & 1) { |
2538 | current_count_sectors = 1; |
2539 | return 1; |
2540 | } else |
2541 | return 0; |
2542 | } |
2543 | HEAD = fsector_t / _floppy->sect; |
2544 | |
2545 | if (((_floppy->stretch & (FD_SWAPSIDES | FD_SECTBASEMASK)) || |
2546 | test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) && |
2547 | fsector_t < _floppy->sect) |
2548 | max_sector = _floppy->sect; |
2549 | |
2550 | /* 2M disks have phantom sectors on the first track */ |
2551 | if ((_floppy->rate & FD_2M) && (!TRACK) && (!HEAD)) { |
2552 | max_sector = 2 * _floppy->sect / 3; |
2553 | if (fsector_t >= max_sector) { |
2554 | current_count_sectors = |
2555 | min_t(int, _floppy->sect - fsector_t, |
2556 | blk_rq_sectors(current_req)); |
2557 | return 1; |
2558 | } |
2559 | SIZECODE = 2; |
2560 | } else |
2561 | SIZECODE = FD_SIZECODE(_floppy); |
2562 | raw_cmd->rate = _floppy->rate & 0x43; |
2563 | if ((_floppy->rate & FD_2M) && (TRACK || HEAD) && raw_cmd->rate == 2) |
2564 | raw_cmd->rate = 1; |
2565 | |
2566 | if (SIZECODE) |
2567 | SIZECODE2 = 0xff; |
2568 | else |
2569 | SIZECODE2 = 0x80; |
2570 | raw_cmd->track = TRACK << STRETCH(_floppy); |
2571 | DR_SELECT = UNIT(current_drive) + PH_HEAD(_floppy, HEAD); |
2572 | GAP = _floppy->gap; |
2573 | ssize = DIV_ROUND_UP(1 << SIZECODE, 4); |
2574 | SECT_PER_TRACK = _floppy->sect << 2 >> SIZECODE; |
2575 | SECTOR = ((fsector_t % _floppy->sect) << 2 >> SIZECODE) + |
2576 | FD_SECTBASE(_floppy); |
2577 | |
2578 | /* tracksize describes the size which can be filled up with sectors |
2579 | * of size ssize. |
2580 | */ |
2581 | tracksize = _floppy->sect - _floppy->sect % ssize; |
2582 | if (tracksize < _floppy->sect) { |
2583 | SECT_PER_TRACK++; |
2584 | if (tracksize <= fsector_t % _floppy->sect) |
2585 | SECTOR--; |
2586 | |
2587 | /* if we are beyond tracksize, fill up using smaller sectors */ |
2588 | while (tracksize <= fsector_t % _floppy->sect) { |
2589 | while (tracksize + ssize > _floppy->sect) { |
2590 | SIZECODE--; |
2591 | ssize >>= 1; |
2592 | } |
2593 | SECTOR++; |
2594 | SECT_PER_TRACK++; |
2595 | tracksize += ssize; |
2596 | } |
2597 | max_sector = HEAD * _floppy->sect + tracksize; |
2598 | } else if (!TRACK && !HEAD && !(_floppy->rate & FD_2M) && probing) { |
2599 | max_sector = _floppy->sect; |
2600 | } else if (!HEAD && CT(COMMAND) == FD_WRITE) { |
2601 | /* for virtual DMA bug workaround */ |
2602 | max_sector = _floppy->sect; |
2603 | } |
2604 | |
2605 | in_sector_offset = (fsector_t % _floppy->sect) % ssize; |
2606 | aligned_sector_t = fsector_t - in_sector_offset; |
2607 | max_size = blk_rq_sectors(current_req); |
2608 | if ((raw_cmd->track == buffer_track) && |
2609 | (current_drive == buffer_drive) && |
2610 | (fsector_t >= buffer_min) && (fsector_t < buffer_max)) { |
2611 | /* data already in track buffer */ |
2612 | if (CT(COMMAND) == FD_READ) { |
2613 | copy_buffer(1, max_sector, buffer_max); |
2614 | return 1; |
2615 | } |
2616 | } else if (in_sector_offset || blk_rq_sectors(current_req) < ssize) { |
2617 | if (CT(COMMAND) == FD_WRITE) { |
2618 | unsigned int sectors; |
2619 | |
2620 | sectors = fsector_t + blk_rq_sectors(current_req); |
2621 | if (sectors > ssize && sectors < ssize + ssize) |
2622 | max_size = ssize + ssize; |
2623 | else |
2624 | max_size = ssize; |
2625 | } |
2626 | raw_cmd->flags &= ~FD_RAW_WRITE; |
2627 | raw_cmd->flags |= FD_RAW_READ; |
2628 | COMMAND = FM_MODE(_floppy, FD_READ); |
2629 | } else if ((unsigned long)current_req->buffer < MAX_DMA_ADDRESS) { |
2630 | unsigned long dma_limit; |
2631 | int direct, indirect; |
2632 | |
2633 | indirect = |
2634 | transfer_size(ssize, max_sector, |
2635 | max_buffer_sectors * 2) - fsector_t; |
2636 | |
2637 | /* |
2638 | * Do NOT use minimum() here---MAX_DMA_ADDRESS is 64 bits wide |
2639 | * on a 64 bit machine! |
2640 | */ |
2641 | max_size = buffer_chain_size(); |
2642 | dma_limit = (MAX_DMA_ADDRESS - |
2643 | ((unsigned long)current_req->buffer)) >> 9; |
2644 | if ((unsigned long)max_size > dma_limit) |
2645 | max_size = dma_limit; |
2646 | /* 64 kb boundaries */ |
2647 | if (CROSS_64KB(current_req->buffer, max_size << 9)) |
2648 | max_size = (K_64 - |
2649 | ((unsigned long)current_req->buffer) % |
2650 | K_64) >> 9; |
2651 | direct = transfer_size(ssize, max_sector, max_size) - fsector_t; |
2652 | /* |
2653 | * We try to read tracks, but if we get too many errors, we |
2654 | * go back to reading just one sector at a time. |
2655 | * |
2656 | * This means we should be able to read a sector even if there |
2657 | * are other bad sectors on this track. |
2658 | */ |
2659 | if (!direct || |
2660 | (indirect * 2 > direct * 3 && |
2661 | *errors < DP->max_errors.read_track && |
2662 | ((!probing || |
2663 | (DP->read_track & (1 << DRS->probed_format)))))) { |
2664 | max_size = blk_rq_sectors(current_req); |
2665 | } else { |
2666 | raw_cmd->kernel_data = current_req->buffer; |
2667 | raw_cmd->length = current_count_sectors << 9; |
2668 | if (raw_cmd->length == 0) { |
2669 | DPRINT("%s: zero dma transfer attempted\n", __func__); |
2670 | DPRINT("indirect=%d direct=%d fsector_t=%d\n", |
2671 | indirect, direct, fsector_t); |
2672 | return 0; |
2673 | } |
2674 | virtualdmabug_workaround(); |
2675 | return 2; |
2676 | } |
2677 | } |
2678 | |
2679 | if (CT(COMMAND) == FD_READ) |
2680 | max_size = max_sector; /* unbounded */ |
2681 | |
2682 | /* claim buffer track if needed */ |
2683 | if (buffer_track != raw_cmd->track || /* bad track */ |
2684 | buffer_drive != current_drive || /* bad drive */ |
2685 | fsector_t > buffer_max || |
2686 | fsector_t < buffer_min || |
2687 | ((CT(COMMAND) == FD_READ || |
2688 | (!in_sector_offset && blk_rq_sectors(current_req) >= ssize)) && |
2689 | max_sector > 2 * max_buffer_sectors + buffer_min && |
2690 | max_size + fsector_t > 2 * max_buffer_sectors + buffer_min)) { |
2691 | /* not enough space */ |
2692 | buffer_track = -1; |
2693 | buffer_drive = current_drive; |
2694 | buffer_max = buffer_min = aligned_sector_t; |
2695 | } |
2696 | raw_cmd->kernel_data = floppy_track_buffer + |
2697 | ((aligned_sector_t - buffer_min) << 9); |
2698 | |
2699 | if (CT(COMMAND) == FD_WRITE) { |
2700 | /* copy write buffer to track buffer. |
2701 | * if we get here, we know that the write |
2702 | * is either aligned or the data already in the buffer |
2703 | * (buffer will be overwritten) */ |
2704 | if (in_sector_offset && buffer_track == -1) |
2705 | DPRINT("internal error offset !=0 on write\n"); |
2706 | buffer_track = raw_cmd->track; |
2707 | buffer_drive = current_drive; |
2708 | copy_buffer(ssize, max_sector, |
2709 | 2 * max_buffer_sectors + buffer_min); |
2710 | } else |
2711 | transfer_size(ssize, max_sector, |
2712 | 2 * max_buffer_sectors + buffer_min - |
2713 | aligned_sector_t); |
2714 | |
2715 | /* round up current_count_sectors to get dma xfer size */ |
2716 | raw_cmd->length = in_sector_offset + current_count_sectors; |
2717 | raw_cmd->length = ((raw_cmd->length - 1) | (ssize - 1)) + 1; |
2718 | raw_cmd->length <<= 9; |
2719 | if ((raw_cmd->length < current_count_sectors << 9) || |
2720 | (raw_cmd->kernel_data != current_req->buffer && |
2721 | CT(COMMAND) == FD_WRITE && |
2722 | (aligned_sector_t + (raw_cmd->length >> 9) > buffer_max || |
2723 | aligned_sector_t < buffer_min)) || |
2724 | raw_cmd->length % (128 << SIZECODE) || |
2725 | raw_cmd->length <= 0 || current_count_sectors <= 0) { |
2726 | DPRINT("fractionary current count b=%lx s=%lx\n", |
2727 | raw_cmd->length, current_count_sectors); |
2728 | if (raw_cmd->kernel_data != current_req->buffer) |
2729 | pr_info("addr=%d, length=%ld\n", |
2730 | (int)((raw_cmd->kernel_data - |
2731 | floppy_track_buffer) >> 9), |
2732 | current_count_sectors); |
2733 | pr_info("st=%d ast=%d mse=%d msi=%d\n", |
2734 | fsector_t, aligned_sector_t, max_sector, max_size); |
2735 | pr_info("ssize=%x SIZECODE=%d\n", ssize, SIZECODE); |
2736 | pr_info("command=%x SECTOR=%d HEAD=%d, TRACK=%d\n", |
2737 | COMMAND, SECTOR, HEAD, TRACK); |
2738 | pr_info("buffer drive=%d\n", buffer_drive); |
2739 | pr_info("buffer track=%d\n", buffer_track); |
2740 | pr_info("buffer_min=%d\n", buffer_min); |
2741 | pr_info("buffer_max=%d\n", buffer_max); |
2742 | return 0; |
2743 | } |
2744 | |
2745 | if (raw_cmd->kernel_data != current_req->buffer) { |
2746 | if (raw_cmd->kernel_data < floppy_track_buffer || |
2747 | current_count_sectors < 0 || |
2748 | raw_cmd->length < 0 || |
2749 | raw_cmd->kernel_data + raw_cmd->length > |
2750 | floppy_track_buffer + (max_buffer_sectors << 10)) { |
2751 | DPRINT("buffer overrun in schedule dma\n"); |
2752 | pr_info("fsector_t=%d buffer_min=%d current_count=%ld\n", |
2753 | fsector_t, buffer_min, raw_cmd->length >> 9); |
2754 | pr_info("current_count_sectors=%ld\n", |
2755 | current_count_sectors); |
2756 | if (CT(COMMAND) == FD_READ) |
2757 | pr_info("read\n"); |
2758 | if (CT(COMMAND) == FD_WRITE) |
2759 | pr_info("write\n"); |
2760 | return 0; |
2761 | } |
2762 | } else if (raw_cmd->length > blk_rq_bytes(current_req) || |
2763 | current_count_sectors > blk_rq_sectors(current_req)) { |
2764 | DPRINT("buffer overrun in direct transfer\n"); |
2765 | return 0; |
2766 | } else if (raw_cmd->length < current_count_sectors << 9) { |
2767 | DPRINT("more sectors than bytes\n"); |
2768 | pr_info("bytes=%ld\n", raw_cmd->length >> 9); |
2769 | pr_info("sectors=%ld\n", current_count_sectors); |
2770 | } |
2771 | if (raw_cmd->length == 0) { |
2772 | DPRINT("zero dma transfer attempted from make_raw_request\n"); |
2773 | return 0; |
2774 | } |
2775 | |
2776 | virtualdmabug_workaround(); |
2777 | return 2; |
2778 | } |
2779 | |
2780 | /* |
2781 | * Round-robin between our available drives, doing one request from each |
2782 | */ |
2783 | static int set_next_request(void) |
2784 | { |
2785 | struct request_queue *q; |
2786 | int old_pos = fdc_queue; |
2787 | |
2788 | do { |
2789 | q = disks[fdc_queue]->queue; |
2790 | if (++fdc_queue == N_DRIVE) |
2791 | fdc_queue = 0; |
2792 | if (q) { |
2793 | current_req = blk_fetch_request(q); |
2794 | if (current_req) |
2795 | break; |
2796 | } |
2797 | } while (fdc_queue != old_pos); |
2798 | |
2799 | return current_req != NULL; |
2800 | } |
2801 | |
2802 | static void redo_fd_request(void) |
2803 | { |
2804 | int drive; |
2805 | int tmp; |
2806 | |
2807 | lastredo = jiffies; |
2808 | if (current_drive < N_DRIVE) |
2809 | floppy_off(current_drive); |
2810 | |
2811 | do_request: |
2812 | if (!current_req) { |
2813 | int pending; |
2814 | |
2815 | spin_lock_irq(&floppy_lock); |
2816 | pending = set_next_request(); |
2817 | spin_unlock_irq(&floppy_lock); |
2818 | if (!pending) { |
2819 | do_floppy = NULL; |
2820 | unlock_fdc(); |
2821 | return; |
2822 | } |
2823 | } |
2824 | drive = (long)current_req->rq_disk->private_data; |
2825 | set_fdc(drive); |
2826 | reschedule_timeout(current_reqD, "redo fd request"); |
2827 | |
2828 | set_floppy(drive); |
2829 | raw_cmd = &default_raw_cmd; |
2830 | raw_cmd->flags = 0; |
2831 | if (start_motor(redo_fd_request)) |
2832 | return; |
2833 | |
2834 | disk_change(current_drive); |
2835 | if (test_bit(current_drive, &fake_change) || |
2836 | test_bit(FD_DISK_CHANGED_BIT, &DRS->flags)) { |
2837 | DPRINT("disk absent or changed during operation\n"); |
2838 | request_done(0); |
2839 | goto do_request; |
2840 | } |
2841 | if (!_floppy) { /* Autodetection */ |
2842 | if (!probing) { |
2843 | DRS->probed_format = 0; |
2844 | if (next_valid_format()) { |
2845 | DPRINT("no autodetectable formats\n"); |
2846 | _floppy = NULL; |
2847 | request_done(0); |
2848 | goto do_request; |
2849 | } |
2850 | } |
2851 | probing = 1; |
2852 | _floppy = floppy_type + DP->autodetect[DRS->probed_format]; |
2853 | } else |
2854 | probing = 0; |
2855 | errors = &(current_req->errors); |
2856 | tmp = make_raw_rw_request(); |
2857 | if (tmp < 2) { |
2858 | request_done(tmp); |
2859 | goto do_request; |
2860 | } |
2861 | |
2862 | if (test_bit(FD_NEED_TWADDLE_BIT, &DRS->flags)) |
2863 | twaddle(); |
2864 | schedule_bh(floppy_start); |
2865 | debugt(__func__, "queue fd request"); |
2866 | return; |
2867 | } |
2868 | |
2869 | static const struct cont_t rw_cont = { |
2870 | .interrupt = rw_interrupt, |
2871 | .redo = redo_fd_request, |
2872 | .error = bad_flp_intr, |
2873 | .done = request_done |
2874 | }; |
2875 | |
2876 | static void process_fd_request(void) |
2877 | { |
2878 | cont = &rw_cont; |
2879 | schedule_bh(redo_fd_request); |
2880 | } |
2881 | |
2882 | static void do_fd_request(struct request_queue *q) |
2883 | { |
2884 | if (WARN(max_buffer_sectors == 0, |
2885 | "VFS: %s called on non-open device\n", __func__)) |
2886 | return; |
2887 | |
2888 | if (WARN(atomic_read(&usage_count) == 0, |
2889 | "warning: usage count=0, current_req=%p sect=%ld type=%x flags=%x\n", |
2890 | current_req, (long)blk_rq_pos(current_req), current_req->cmd_type, |
2891 | current_req->cmd_flags)) |
2892 | return; |
2893 | |
2894 | if (test_and_set_bit(0, &fdc_busy)) { |
2895 | /* fdc busy, this new request will be treated when the |
2896 | current one is done */ |
2897 | is_alive(__func__, "old request running"); |
2898 | return; |
2899 | } |
2900 | command_status = FD_COMMAND_NONE; |
2901 | __reschedule_timeout(MAXTIMEOUT, "fd_request"); |
2902 | set_fdc(0); |
2903 | process_fd_request(); |
2904 | is_alive(__func__, ""); |
2905 | } |
2906 | |
2907 | static const struct cont_t poll_cont = { |
2908 | .interrupt = success_and_wakeup, |
2909 | .redo = floppy_ready, |
2910 | .error = generic_failure, |
2911 | .done = generic_done |
2912 | }; |
2913 | |
2914 | static int poll_drive(bool interruptible, int flag) |
2915 | { |
2916 | /* no auto-sense, just clear dcl */ |
2917 | raw_cmd = &default_raw_cmd; |
2918 | raw_cmd->flags = flag; |
2919 | raw_cmd->track = 0; |
2920 | raw_cmd->cmd_count = 0; |
2921 | cont = &poll_cont; |
2922 | debug_dcl(DP->flags, "setting NEWCHANGE in poll_drive\n"); |
2923 | set_bit(FD_DISK_NEWCHANGE_BIT, &DRS->flags); |
2924 | |
2925 | return wait_til_done(floppy_ready, interruptible); |
2926 | } |
2927 | |
2928 | /* |
2929 | * User triggered reset |
2930 | * ==================== |
2931 | */ |
2932 | |
2933 | static void reset_intr(void) |
2934 | { |
2935 | pr_info("weird, reset interrupt called\n"); |
2936 | } |
2937 | |
2938 | static const struct cont_t reset_cont = { |
2939 | .interrupt = reset_intr, |
2940 | .redo = success_and_wakeup, |
2941 | .error = generic_failure, |
2942 | .done = generic_done |
2943 | }; |
2944 | |
2945 | static int user_reset_fdc(int drive, int arg, bool interruptible) |
2946 | { |
2947 | int ret; |
2948 | |
2949 | if (lock_fdc(drive, interruptible)) |
2950 | return -EINTR; |
2951 | |
2952 | if (arg == FD_RESET_ALWAYS) |
2953 | FDCS->reset = 1; |
2954 | if (FDCS->reset) { |
2955 | cont = &reset_cont; |
2956 | ret = wait_til_done(reset_fdc, interruptible); |
2957 | if (ret == -EINTR) |
2958 | return -EINTR; |
2959 | } |
2960 | process_fd_request(); |
2961 | return 0; |
2962 | } |
2963 | |
2964 | /* |
2965 | * Misc Ioctl's and support |
2966 | * ======================== |
2967 | */ |
2968 | static inline int fd_copyout(void __user *param, const void *address, |
2969 | unsigned long size) |
2970 | { |
2971 | return copy_to_user(param, address, size) ? -EFAULT : 0; |
2972 | } |
2973 | |
2974 | static inline int fd_copyin(void __user *param, void *address, |
2975 | unsigned long size) |
2976 | { |
2977 | return copy_from_user(address, param, size) ? -EFAULT : 0; |
2978 | } |
2979 | |
2980 | static const char *drive_name(int type, int drive) |
2981 | { |
2982 | struct floppy_struct *floppy; |
2983 | |
2984 | if (type) |
2985 | floppy = floppy_type + type; |
2986 | else { |
2987 | if (UDP->native_format) |
2988 | floppy = floppy_type + UDP->native_format; |
2989 | else |
2990 | return "(null)"; |
2991 | } |
2992 | if (floppy->name) |
2993 | return floppy->name; |
2994 | else |
2995 | return "(null)"; |
2996 | } |
2997 | |
2998 | /* raw commands */ |
2999 | static void raw_cmd_done(int flag) |
3000 | { |
3001 | int i; |
3002 | |
3003 | if (!flag) { |
3004 | raw_cmd->flags |= FD_RAW_FAILURE; |
3005 | raw_cmd->flags |= FD_RAW_HARDFAILURE; |
3006 | } else { |
3007 | raw_cmd->reply_count = inr; |
3008 | if (raw_cmd->reply_count > MAX_REPLIES) |
3009 | raw_cmd->reply_count = 0; |
3010 | for (i = 0; i < raw_cmd->reply_count; i++) |
3011 | raw_cmd->reply[i] = reply_buffer[i]; |
3012 | |
3013 | if (raw_cmd->flags & (FD_RAW_READ | FD_RAW_WRITE)) { |
3014 | unsigned long flags; |
3015 | flags = claim_dma_lock(); |
3016 | raw_cmd->length = fd_get_dma_residue(); |
3017 | release_dma_lock(flags); |
3018 | } |
3019 | |
3020 | if ((raw_cmd->flags & FD_RAW_SOFTFAILURE) && |
3021 | (!raw_cmd->reply_count || (raw_cmd->reply[0] & 0xc0))) |
3022 | raw_cmd->flags |= FD_RAW_FAILURE; |
3023 | |
3024 | if (disk_change(current_drive)) |
3025 | raw_cmd->flags |= FD_RAW_DISK_CHANGE; |
3026 | else |
3027 | raw_cmd->flags &= ~FD_RAW_DISK_CHANGE; |
3028 | if (raw_cmd->flags & FD_RAW_NO_MOTOR_AFTER) |
3029 | motor_off_callback(current_drive); |
3030 | |
3031 | if (raw_cmd->next && |
3032 | (!(raw_cmd->flags & FD_RAW_FAILURE) || |
3033 | !(raw_cmd->flags & FD_RAW_STOP_IF_FAILURE)) && |
3034 | ((raw_cmd->flags & FD_RAW_FAILURE) || |
3035 | !(raw_cmd->flags & FD_RAW_STOP_IF_SUCCESS))) { |
3036 | raw_cmd = raw_cmd->next; |
3037 | return; |
3038 | } |
3039 | } |
3040 | generic_done(flag); |
3041 | } |
3042 | |
3043 | static const struct cont_t raw_cmd_cont = { |
3044 | .interrupt = success_and_wakeup, |
3045 | .redo = floppy_start, |
3046 | .error = generic_failure, |
3047 | .done = raw_cmd_done |
3048 | }; |
3049 | |
3050 | static int raw_cmd_copyout(int cmd, void __user *param, |
3051 | struct floppy_raw_cmd *ptr) |
3052 | { |
3053 | int ret; |
3054 | |
3055 | while (ptr) { |
3056 | ret = copy_to_user(param, ptr, sizeof(*ptr)); |
3057 | if (ret) |
3058 | return -EFAULT; |
3059 | param += sizeof(struct floppy_raw_cmd); |
3060 | if ((ptr->flags & FD_RAW_READ) && ptr->buffer_length) { |
3061 | if (ptr->length >= 0 && |
3062 | ptr->length <= ptr->buffer_length) { |
3063 | long length = ptr->buffer_length - ptr->length; |
3064 | ret = fd_copyout(ptr->data, ptr->kernel_data, |
3065 | length); |
3066 | if (ret) |
3067 | return ret; |
3068 | } |
3069 | } |
3070 | ptr = ptr->next; |
3071 | } |
3072 | |
3073 | return 0; |
3074 | } |
3075 | |
3076 | static void raw_cmd_free(struct floppy_raw_cmd **ptr) |
3077 | { |
3078 | struct floppy_raw_cmd *next; |
3079 | struct floppy_raw_cmd *this; |
3080 | |
3081 | this = *ptr; |
3082 | *ptr = NULL; |
3083 | while (this) { |
3084 | if (this->buffer_length) { |
3085 | fd_dma_mem_free((unsigned long)this->kernel_data, |
3086 | this->buffer_length); |
3087 | this->buffer_length = 0; |
3088 | } |
3089 | next = this->next; |
3090 | kfree(this); |
3091 | this = next; |
3092 | } |
3093 | } |
3094 | |
3095 | static int raw_cmd_copyin(int cmd, void __user *param, |
3096 | struct floppy_raw_cmd **rcmd) |
3097 | { |
3098 | struct floppy_raw_cmd *ptr; |
3099 | int ret; |
3100 | int i; |
3101 | |
3102 | *rcmd = NULL; |
3103 | |
3104 | loop: |
3105 | ptr = kmalloc(sizeof(struct floppy_raw_cmd), GFP_USER); |
3106 | if (!ptr) |
3107 | return -ENOMEM; |
3108 | *rcmd = ptr; |
3109 | ret = copy_from_user(ptr, param, sizeof(*ptr)); |
3110 | if (ret) |
3111 | return -EFAULT; |
3112 | ptr->next = NULL; |
3113 | ptr->buffer_length = 0; |
3114 | param += sizeof(struct floppy_raw_cmd); |
3115 | if (ptr->cmd_count > 33) |
3116 | /* the command may now also take up the space |
3117 | * initially intended for the reply & the |
3118 | * reply count. Needed for long 82078 commands |
3119 | * such as RESTORE, which takes ... 17 command |
3120 | * bytes. Murphy's law #137: When you reserve |
3121 | * 16 bytes for a structure, you'll one day |
3122 | * discover that you really need 17... |
3123 | */ |
3124 | return -EINVAL; |
3125 | |
3126 | for (i = 0; i < 16; i++) |
3127 | ptr->reply[i] = 0; |
3128 | ptr->resultcode = 0; |
3129 | ptr->kernel_data = NULL; |
3130 | |
3131 | if (ptr->flags & (FD_RAW_READ | FD_RAW_WRITE)) { |
3132 | if (ptr->length <= 0) |
3133 | return -EINVAL; |
3134 | ptr->kernel_data = (char *)fd_dma_mem_alloc(ptr->length); |
3135 | fallback_on_nodma_alloc(&ptr->kernel_data, ptr->length); |
3136 | if (!ptr->kernel_data) |
3137 | return -ENOMEM; |
3138 | ptr->buffer_length = ptr->length; |
3139 | } |
3140 | if (ptr->flags & FD_RAW_WRITE) { |
3141 | ret = fd_copyin(ptr->data, ptr->kernel_data, ptr->length); |
3142 | if (ret) |
3143 | return ret; |
3144 | } |
3145 | |
3146 | if (ptr->flags & FD_RAW_MORE) { |
3147 | rcmd = &(ptr->next); |
3148 | ptr->rate &= 0x43; |
3149 | goto loop; |
3150 | } |
3151 | |
3152 | return 0; |
3153 | } |
3154 | |
3155 | static int raw_cmd_ioctl(int cmd, void __user *param) |
3156 | { |
3157 | struct floppy_raw_cmd *my_raw_cmd; |
3158 | int drive; |
3159 | int ret2; |
3160 | int ret; |
3161 | |
3162 | if (FDCS->rawcmd <= 1) |
3163 | FDCS->rawcmd = 1; |
3164 | for (drive = 0; drive < N_DRIVE; drive++) { |
3165 | if (FDC(drive) != fdc) |
3166 | continue; |
3167 | if (drive == current_drive) { |
3168 | if (UDRS->fd_ref > 1) { |
3169 | FDCS->rawcmd = 2; |
3170 | break; |
3171 | } |
3172 | } else if (UDRS->fd_ref) { |
3173 | FDCS->rawcmd = 2; |
3174 | break; |
3175 | } |
3176 | } |
3177 | |
3178 | if (FDCS->reset) |
3179 | return -EIO; |
3180 | |
3181 | ret = raw_cmd_copyin(cmd, param, &my_raw_cmd); |
3182 | if (ret) { |
3183 | raw_cmd_free(&my_raw_cmd); |
3184 | return ret; |
3185 | } |
3186 | |
3187 | raw_cmd = my_raw_cmd; |
3188 | cont = &raw_cmd_cont; |
3189 | ret = wait_til_done(floppy_start, true); |
3190 | debug_dcl(DP->flags, "calling disk change from raw_cmd ioctl\n"); |
3191 | |
3192 | if (ret != -EINTR && FDCS->reset) |
3193 | ret = -EIO; |
3194 | |
3195 | DRS->track = NO_TRACK; |
3196 | |
3197 | ret2 = raw_cmd_copyout(cmd, param, my_raw_cmd); |
3198 | if (!ret) |
3199 | ret = ret2; |
3200 | raw_cmd_free(&my_raw_cmd); |
3201 | return ret; |
3202 | } |
3203 | |
3204 | static int invalidate_drive(struct block_device *bdev) |
3205 | { |
3206 | /* invalidate the buffer track to force a reread */ |
3207 | set_bit((long)bdev->bd_disk->private_data, &fake_change); |
3208 | process_fd_request(); |
3209 | check_disk_change(bdev); |
3210 | return 0; |
3211 | } |
3212 | |
3213 | static int set_geometry(unsigned int cmd, struct floppy_struct *g, |
3214 | int drive, int type, struct block_device *bdev) |
3215 | { |
3216 | int cnt; |
3217 | |
3218 | /* sanity checking for parameters. */ |
3219 | if (g->sect <= 0 || |
3220 | g->head <= 0 || |
3221 | g->track <= 0 || g->track > UDP->tracks >> STRETCH(g) || |
3222 | /* check if reserved bits are set */ |
3223 | (g->stretch & ~(FD_STRETCH | FD_SWAPSIDES | FD_SECTBASEMASK)) != 0) |
3224 | return -EINVAL; |
3225 | if (type) { |
3226 | if (!capable(CAP_SYS_ADMIN)) |
3227 | return -EPERM; |
3228 | mutex_lock(&open_lock); |
3229 | if (lock_fdc(drive, true)) { |
3230 | mutex_unlock(&open_lock); |
3231 | return -EINTR; |
3232 | } |
3233 | floppy_type[type] = *g; |
3234 | floppy_type[type].name = "user format"; |
3235 | for (cnt = type << 2; cnt < (type << 2) + 4; cnt++) |
3236 | floppy_sizes[cnt] = floppy_sizes[cnt + 0x80] = |
3237 | floppy_type[type].size + 1; |
3238 | process_fd_request(); |
3239 | for (cnt = 0; cnt < N_DRIVE; cnt++) { |
3240 | struct block_device *bdev = opened_bdev[cnt]; |
3241 | if (!bdev || ITYPE(drive_state[cnt].fd_device) != type) |
3242 | continue; |
3243 | __invalidate_device(bdev, true); |
3244 | } |
3245 | mutex_unlock(&open_lock); |
3246 | } else { |
3247 | int oldStretch; |
3248 | |
3249 | if (lock_fdc(drive, true)) |
3250 | return -EINTR; |
3251 | if (cmd != FDDEFPRM) { |
3252 | /* notice a disk change immediately, else |
3253 | * we lose our settings immediately*/ |
3254 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
3255 | return -EINTR; |
3256 | } |
3257 | oldStretch = g->stretch; |
3258 | user_params[drive] = *g; |
3259 | if (buffer_drive == drive) |
3260 | SUPBOUND(buffer_max, user_params[drive].sect); |
3261 | current_type[drive] = &user_params[drive]; |
3262 | floppy_sizes[drive] = user_params[drive].size; |
3263 | if (cmd == FDDEFPRM) |
3264 | DRS->keep_data = -1; |
3265 | else |
3266 | DRS->keep_data = 1; |
3267 | /* invalidation. Invalidate only when needed, i.e. |
3268 | * when there are already sectors in the buffer cache |
3269 | * whose number will change. This is useful, because |
3270 | * mtools often changes the geometry of the disk after |
3271 | * looking at the boot block */ |
3272 | if (DRS->maxblock > user_params[drive].sect || |
3273 | DRS->maxtrack || |
3274 | ((user_params[drive].sect ^ oldStretch) & |
3275 | (FD_SWAPSIDES | FD_SECTBASEMASK))) |
3276 | invalidate_drive(bdev); |
3277 | else |
3278 | process_fd_request(); |
3279 | } |
3280 | return 0; |
3281 | } |
3282 | |
3283 | /* handle obsolete ioctl's */ |
3284 | static unsigned int ioctl_table[] = { |
3285 | FDCLRPRM, |
3286 | FDSETPRM, |
3287 | FDDEFPRM, |
3288 | FDGETPRM, |
3289 | FDMSGON, |
3290 | FDMSGOFF, |
3291 | FDFMTBEG, |
3292 | FDFMTTRK, |
3293 | FDFMTEND, |
3294 | FDSETEMSGTRESH, |
3295 | FDFLUSH, |
3296 | FDSETMAXERRS, |
3297 | FDGETMAXERRS, |
3298 | FDGETDRVTYP, |
3299 | FDSETDRVPRM, |
3300 | FDGETDRVPRM, |
3301 | FDGETDRVSTAT, |
3302 | FDPOLLDRVSTAT, |
3303 | FDRESET, |
3304 | FDGETFDCSTAT, |
3305 | FDWERRORCLR, |
3306 | FDWERRORGET, |
3307 | FDRAWCMD, |
3308 | FDEJECT, |
3309 | FDTWADDLE |
3310 | }; |
3311 | |
3312 | static int normalize_ioctl(unsigned int *cmd, int *size) |
3313 | { |
3314 | int i; |
3315 | |
3316 | for (i = 0; i < ARRAY_SIZE(ioctl_table); i++) { |
3317 | if ((*cmd & 0xffff) == (ioctl_table[i] & 0xffff)) { |
3318 | *size = _IOC_SIZE(*cmd); |
3319 | *cmd = ioctl_table[i]; |
3320 | if (*size > _IOC_SIZE(*cmd)) { |
3321 | pr_info("ioctl not yet supported\n"); |
3322 | return -EFAULT; |
3323 | } |
3324 | return 0; |
3325 | } |
3326 | } |
3327 | return -EINVAL; |
3328 | } |
3329 | |
3330 | static int get_floppy_geometry(int drive, int type, struct floppy_struct **g) |
3331 | { |
3332 | if (type) |
3333 | *g = &floppy_type[type]; |
3334 | else { |
3335 | if (lock_fdc(drive, false)) |
3336 | return -EINTR; |
3337 | if (poll_drive(false, 0) == -EINTR) |
3338 | return -EINTR; |
3339 | process_fd_request(); |
3340 | *g = current_type[drive]; |
3341 | } |
3342 | if (!*g) |
3343 | return -ENODEV; |
3344 | return 0; |
3345 | } |
3346 | |
3347 | static int fd_getgeo(struct block_device *bdev, struct hd_geometry *geo) |
3348 | { |
3349 | int drive = (long)bdev->bd_disk->private_data; |
3350 | int type = ITYPE(drive_state[drive].fd_device); |
3351 | struct floppy_struct *g; |
3352 | int ret; |
3353 | |
3354 | ret = get_floppy_geometry(drive, type, &g); |
3355 | if (ret) |
3356 | return ret; |
3357 | |
3358 | geo->heads = g->head; |
3359 | geo->sectors = g->sect; |
3360 | geo->cylinders = g->track; |
3361 | return 0; |
3362 | } |
3363 | |
3364 | static int fd_locked_ioctl(struct block_device *bdev, fmode_t mode, unsigned int cmd, |
3365 | unsigned long param) |
3366 | { |
3367 | int drive = (long)bdev->bd_disk->private_data; |
3368 | int type = ITYPE(UDRS->fd_device); |
3369 | int i; |
3370 | int ret; |
3371 | int size; |
3372 | union inparam { |
3373 | struct floppy_struct g; /* geometry */ |
3374 | struct format_descr f; |
3375 | struct floppy_max_errors max_errors; |
3376 | struct floppy_drive_params dp; |
3377 | } inparam; /* parameters coming from user space */ |
3378 | const void *outparam; /* parameters passed back to user space */ |
3379 | |
3380 | /* convert compatibility eject ioctls into floppy eject ioctl. |
3381 | * We do this in order to provide a means to eject floppy disks before |
3382 | * installing the new fdutils package */ |
3383 | if (cmd == CDROMEJECT || /* CD-ROM eject */ |
3384 | cmd == 0x6470) { /* SunOS floppy eject */ |
3385 | DPRINT("obsolete eject ioctl\n"); |
3386 | DPRINT("please use floppycontrol --eject\n"); |
3387 | cmd = FDEJECT; |
3388 | } |
3389 | |
3390 | if (!((cmd & 0xff00) == 0x0200)) |
3391 | return -EINVAL; |
3392 | |
3393 | /* convert the old style command into a new style command */ |
3394 | ret = normalize_ioctl(&cmd, &size); |
3395 | if (ret) |
3396 | return ret; |
3397 | |
3398 | /* permission checks */ |
3399 | if (((cmd & 0x40) && !(mode & (FMODE_WRITE | FMODE_WRITE_IOCTL))) || |
3400 | ((cmd & 0x80) && !capable(CAP_SYS_ADMIN))) |
3401 | return -EPERM; |
3402 | |
3403 | if (WARN_ON(size < 0 || size > sizeof(inparam))) |
3404 | return -EINVAL; |
3405 | |
3406 | /* copyin */ |
3407 | memset(&inparam, 0, sizeof(inparam)); |
3408 | if (_IOC_DIR(cmd) & _IOC_WRITE) { |
3409 | ret = fd_copyin((void __user *)param, &inparam, size); |
3410 | if (ret) |
3411 | return ret; |
3412 | } |
3413 | |
3414 | switch (cmd) { |
3415 | case FDEJECT: |
3416 | if (UDRS->fd_ref != 1) |
3417 | /* somebody else has this drive open */ |
3418 | return -EBUSY; |
3419 | if (lock_fdc(drive, true)) |
3420 | return -EINTR; |
3421 | |
3422 | /* do the actual eject. Fails on |
3423 | * non-Sparc architectures */ |
3424 | ret = fd_eject(UNIT(drive)); |
3425 | |
3426 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3427 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
3428 | process_fd_request(); |
3429 | return ret; |
3430 | case FDCLRPRM: |
3431 | if (lock_fdc(drive, true)) |
3432 | return -EINTR; |
3433 | current_type[drive] = NULL; |
3434 | floppy_sizes[drive] = MAX_DISK_SIZE << 1; |
3435 | UDRS->keep_data = 0; |
3436 | return invalidate_drive(bdev); |
3437 | case FDSETPRM: |
3438 | case FDDEFPRM: |
3439 | return set_geometry(cmd, &inparam.g, drive, type, bdev); |
3440 | case FDGETPRM: |
3441 | ret = get_floppy_geometry(drive, type, |
3442 | (struct floppy_struct **)&outparam); |
3443 | if (ret) |
3444 | return ret; |
3445 | break; |
3446 | case FDMSGON: |
3447 | UDP->flags |= FTD_MSG; |
3448 | return 0; |
3449 | case FDMSGOFF: |
3450 | UDP->flags &= ~FTD_MSG; |
3451 | return 0; |
3452 | case FDFMTBEG: |
3453 | if (lock_fdc(drive, true)) |
3454 | return -EINTR; |
3455 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
3456 | return -EINTR; |
3457 | ret = UDRS->flags; |
3458 | process_fd_request(); |
3459 | if (ret & FD_VERIFY) |
3460 | return -ENODEV; |
3461 | if (!(ret & FD_DISK_WRITABLE)) |
3462 | return -EROFS; |
3463 | return 0; |
3464 | case FDFMTTRK: |
3465 | if (UDRS->fd_ref != 1) |
3466 | return -EBUSY; |
3467 | return do_format(drive, &inparam.f); |
3468 | case FDFMTEND: |
3469 | case FDFLUSH: |
3470 | if (lock_fdc(drive, true)) |
3471 | return -EINTR; |
3472 | return invalidate_drive(bdev); |
3473 | case FDSETEMSGTRESH: |
3474 | UDP->max_errors.reporting = (unsigned short)(param & 0x0f); |
3475 | return 0; |
3476 | case FDGETMAXERRS: |
3477 | outparam = &UDP->max_errors; |
3478 | break; |
3479 | case FDSETMAXERRS: |
3480 | UDP->max_errors = inparam.max_errors; |
3481 | break; |
3482 | case FDGETDRVTYP: |
3483 | outparam = drive_name(type, drive); |
3484 | SUPBOUND(size, strlen((const char *)outparam) + 1); |
3485 | break; |
3486 | case FDSETDRVPRM: |
3487 | *UDP = inparam.dp; |
3488 | break; |
3489 | case FDGETDRVPRM: |
3490 | outparam = UDP; |
3491 | break; |
3492 | case FDPOLLDRVSTAT: |
3493 | if (lock_fdc(drive, true)) |
3494 | return -EINTR; |
3495 | if (poll_drive(true, FD_RAW_NEED_DISK) == -EINTR) |
3496 | return -EINTR; |
3497 | process_fd_request(); |
3498 | /* fall through */ |
3499 | case FDGETDRVSTAT: |
3500 | outparam = UDRS; |
3501 | break; |
3502 | case FDRESET: |
3503 | return user_reset_fdc(drive, (int)param, true); |
3504 | case FDGETFDCSTAT: |
3505 | outparam = UFDCS; |
3506 | break; |
3507 | case FDWERRORCLR: |
3508 | memset(UDRWE, 0, sizeof(*UDRWE)); |
3509 | return 0; |
3510 | case FDWERRORGET: |
3511 | outparam = UDRWE; |
3512 | break; |
3513 | case FDRAWCMD: |
3514 | if (type) |
3515 | return -EINVAL; |
3516 | if (lock_fdc(drive, true)) |
3517 | return -EINTR; |
3518 | set_floppy(drive); |
3519 | i = raw_cmd_ioctl(cmd, (void __user *)param); |
3520 | if (i == -EINTR) |
3521 | return -EINTR; |
3522 | process_fd_request(); |
3523 | return i; |
3524 | case FDTWADDLE: |
3525 | if (lock_fdc(drive, true)) |
3526 | return -EINTR; |
3527 | twaddle(); |
3528 | process_fd_request(); |
3529 | return 0; |
3530 | default: |
3531 | return -EINVAL; |
3532 | } |
3533 | |
3534 | if (_IOC_DIR(cmd) & _IOC_READ) |
3535 | return fd_copyout((void __user *)param, outparam, size); |
3536 | |
3537 | return 0; |
3538 | } |
3539 | |
3540 | static int fd_ioctl(struct block_device *bdev, fmode_t mode, |
3541 | unsigned int cmd, unsigned long param) |
3542 | { |
3543 | int ret; |
3544 | |
3545 | mutex_lock(&floppy_mutex); |
3546 | ret = fd_locked_ioctl(bdev, mode, cmd, param); |
3547 | mutex_unlock(&floppy_mutex); |
3548 | |
3549 | return ret; |
3550 | } |
3551 | |
3552 | static void __init config_types(void) |
3553 | { |
3554 | bool has_drive = false; |
3555 | int drive; |
3556 | |
3557 | /* read drive info out of physical CMOS */ |
3558 | drive = 0; |
3559 | if (!UDP->cmos) |
3560 | UDP->cmos = FLOPPY0_TYPE; |
3561 | drive = 1; |
3562 | if (!UDP->cmos && FLOPPY1_TYPE) |
3563 | UDP->cmos = FLOPPY1_TYPE; |
3564 | |
3565 | /* FIXME: additional physical CMOS drive detection should go here */ |
3566 | |
3567 | for (drive = 0; drive < N_DRIVE; drive++) { |
3568 | unsigned int type = UDP->cmos; |
3569 | struct floppy_drive_params *params; |
3570 | const char *name = NULL; |
3571 | static char temparea[32]; |
3572 | |
3573 | if (type < ARRAY_SIZE(default_drive_params)) { |
3574 | params = &default_drive_params[type].params; |
3575 | if (type) { |
3576 | name = default_drive_params[type].name; |
3577 | allowed_drive_mask |= 1 << drive; |
3578 | } else |
3579 | allowed_drive_mask &= ~(1 << drive); |
3580 | } else { |
3581 | params = &default_drive_params[0].params; |
3582 | sprintf(temparea, "unknown type %d (usb?)", type); |
3583 | name = temparea; |
3584 | } |
3585 | if (name) { |
3586 | const char *prepend; |
3587 | if (!has_drive) { |
3588 | prepend = ""; |
3589 | has_drive = true; |
3590 | pr_info("Floppy drive(s):"); |
3591 | } else { |
3592 | prepend = ","; |
3593 | } |
3594 | |
3595 | pr_cont("%s fd%d is %s", prepend, drive, name); |
3596 | } |
3597 | *UDP = *params; |
3598 | } |
3599 | |
3600 | if (has_drive) |
3601 | pr_cont("\n"); |
3602 | } |
3603 | |
3604 | static int floppy_release(struct gendisk *disk, fmode_t mode) |
3605 | { |
3606 | int drive = (long)disk->private_data; |
3607 | |
3608 | mutex_lock(&floppy_mutex); |
3609 | mutex_lock(&open_lock); |
3610 | if (!UDRS->fd_ref--) { |
3611 | DPRINT("floppy_release with fd_ref == 0"); |
3612 | UDRS->fd_ref = 0; |
3613 | } |
3614 | if (!UDRS->fd_ref) |
3615 | opened_bdev[drive] = NULL; |
3616 | mutex_unlock(&open_lock); |
3617 | mutex_unlock(&floppy_mutex); |
3618 | |
3619 | return 0; |
3620 | } |
3621 | |
3622 | /* |
3623 | * floppy_open check for aliasing (/dev/fd0 can be the same as |
3624 | * /dev/PS0 etc), and disallows simultaneous access to the same |
3625 | * drive with different device numbers. |
3626 | */ |
3627 | static int floppy_open(struct block_device *bdev, fmode_t mode) |
3628 | { |
3629 | int drive = (long)bdev->bd_disk->private_data; |
3630 | int old_dev, new_dev; |
3631 | int try; |
3632 | int res = -EBUSY; |
3633 | char *tmp; |
3634 | |
3635 | mutex_lock(&floppy_mutex); |
3636 | mutex_lock(&open_lock); |
3637 | old_dev = UDRS->fd_device; |
3638 | if (opened_bdev[drive] && opened_bdev[drive] != bdev) |
3639 | goto out2; |
3640 | |
3641 | if (!UDRS->fd_ref && (UDP->flags & FD_BROKEN_DCL)) { |
3642 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3643 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
3644 | } |
3645 | |
3646 | UDRS->fd_ref++; |
3647 | |
3648 | opened_bdev[drive] = bdev; |
3649 | |
3650 | res = -ENXIO; |
3651 | |
3652 | if (!floppy_track_buffer) { |
3653 | /* if opening an ED drive, reserve a big buffer, |
3654 | * else reserve a small one */ |
3655 | if ((UDP->cmos == 6) || (UDP->cmos == 5)) |
3656 | try = 64; /* Only 48 actually useful */ |
3657 | else |
3658 | try = 32; /* Only 24 actually useful */ |
3659 | |
3660 | tmp = (char *)fd_dma_mem_alloc(1024 * try); |
3661 | if (!tmp && !floppy_track_buffer) { |
3662 | try >>= 1; /* buffer only one side */ |
3663 | INFBOUND(try, 16); |
3664 | tmp = (char *)fd_dma_mem_alloc(1024 * try); |
3665 | } |
3666 | if (!tmp && !floppy_track_buffer) |
3667 | fallback_on_nodma_alloc(&tmp, 2048 * try); |
3668 | if (!tmp && !floppy_track_buffer) { |
3669 | DPRINT("Unable to allocate DMA memory\n"); |
3670 | goto out; |
3671 | } |
3672 | if (floppy_track_buffer) { |
3673 | if (tmp) |
3674 | fd_dma_mem_free((unsigned long)tmp, try * 1024); |
3675 | } else { |
3676 | buffer_min = buffer_max = -1; |
3677 | floppy_track_buffer = tmp; |
3678 | max_buffer_sectors = try; |
3679 | } |
3680 | } |
3681 | |
3682 | new_dev = MINOR(bdev->bd_dev); |
3683 | UDRS->fd_device = new_dev; |
3684 | set_capacity(disks[drive], floppy_sizes[new_dev]); |
3685 | if (old_dev != -1 && old_dev != new_dev) { |
3686 | if (buffer_drive == drive) |
3687 | buffer_track = -1; |
3688 | } |
3689 | |
3690 | if (UFDCS->rawcmd == 1) |
3691 | UFDCS->rawcmd = 2; |
3692 | |
3693 | if (!(mode & FMODE_NDELAY)) { |
3694 | if (mode & (FMODE_READ|FMODE_WRITE)) { |
3695 | UDRS->last_checked = 0; |
3696 | check_disk_change(bdev); |
3697 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags)) |
3698 | goto out; |
3699 | } |
3700 | res = -EROFS; |
3701 | if ((mode & FMODE_WRITE) && |
3702 | !test_bit(FD_DISK_WRITABLE_BIT, &UDRS->flags)) |
3703 | goto out; |
3704 | } |
3705 | mutex_unlock(&open_lock); |
3706 | mutex_unlock(&floppy_mutex); |
3707 | return 0; |
3708 | out: |
3709 | UDRS->fd_ref--; |
3710 | |
3711 | if (!UDRS->fd_ref) |
3712 | opened_bdev[drive] = NULL; |
3713 | out2: |
3714 | mutex_unlock(&open_lock); |
3715 | mutex_unlock(&floppy_mutex); |
3716 | return res; |
3717 | } |
3718 | |
3719 | /* |
3720 | * Check if the disk has been changed or if a change has been faked. |
3721 | */ |
3722 | static unsigned int floppy_check_events(struct gendisk *disk, |
3723 | unsigned int clearing) |
3724 | { |
3725 | int drive = (long)disk->private_data; |
3726 | |
3727 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3728 | test_bit(FD_VERIFY_BIT, &UDRS->flags)) |
3729 | return DISK_EVENT_MEDIA_CHANGE; |
3730 | |
3731 | if (time_after(jiffies, UDRS->last_checked + UDP->checkfreq)) { |
3732 | lock_fdc(drive, false); |
3733 | poll_drive(false, 0); |
3734 | process_fd_request(); |
3735 | } |
3736 | |
3737 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3738 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || |
3739 | test_bit(drive, &fake_change) || |
3740 | drive_no_geom(drive)) |
3741 | return DISK_EVENT_MEDIA_CHANGE; |
3742 | return 0; |
3743 | } |
3744 | |
3745 | /* |
3746 | * This implements "read block 0" for floppy_revalidate(). |
3747 | * Needed for format autodetection, checking whether there is |
3748 | * a disk in the drive, and whether that disk is writable. |
3749 | */ |
3750 | |
3751 | static void floppy_rb0_complete(struct bio *bio, int err) |
3752 | { |
3753 | complete((struct completion *)bio->bi_private); |
3754 | } |
3755 | |
3756 | static int __floppy_read_block_0(struct block_device *bdev) |
3757 | { |
3758 | struct bio bio; |
3759 | struct bio_vec bio_vec; |
3760 | struct completion complete; |
3761 | struct page *page; |
3762 | size_t size; |
3763 | |
3764 | page = alloc_page(GFP_NOIO); |
3765 | if (!page) { |
3766 | process_fd_request(); |
3767 | return -ENOMEM; |
3768 | } |
3769 | |
3770 | size = bdev->bd_block_size; |
3771 | if (!size) |
3772 | size = 1024; |
3773 | |
3774 | bio_init(&bio); |
3775 | bio.bi_io_vec = &bio_vec; |
3776 | bio_vec.bv_page = page; |
3777 | bio_vec.bv_len = size; |
3778 | bio_vec.bv_offset = 0; |
3779 | bio.bi_vcnt = 1; |
3780 | bio.bi_idx = 0; |
3781 | bio.bi_size = size; |
3782 | bio.bi_bdev = bdev; |
3783 | bio.bi_sector = 0; |
3784 | bio.bi_flags = (1 << BIO_QUIET); |
3785 | init_completion(&complete); |
3786 | bio.bi_private = &complete; |
3787 | bio.bi_end_io = floppy_rb0_complete; |
3788 | |
3789 | submit_bio(READ, &bio); |
3790 | process_fd_request(); |
3791 | wait_for_completion(&complete); |
3792 | |
3793 | __free_page(page); |
3794 | |
3795 | return 0; |
3796 | } |
3797 | |
3798 | /* revalidate the floppy disk, i.e. trigger format autodetection by reading |
3799 | * the bootblock (block 0). "Autodetection" is also needed to check whether |
3800 | * there is a disk in the drive at all... Thus we also do it for fixed |
3801 | * geometry formats */ |
3802 | static int floppy_revalidate(struct gendisk *disk) |
3803 | { |
3804 | int drive = (long)disk->private_data; |
3805 | int cf; |
3806 | int res = 0; |
3807 | |
3808 | if (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3809 | test_bit(FD_VERIFY_BIT, &UDRS->flags) || |
3810 | test_bit(drive, &fake_change) || |
3811 | drive_no_geom(drive)) { |
3812 | if (WARN(atomic_read(&usage_count) == 0, |
3813 | "VFS: revalidate called on non-open device.\n")) |
3814 | return -EFAULT; |
3815 | |
3816 | lock_fdc(drive, false); |
3817 | cf = (test_bit(FD_DISK_CHANGED_BIT, &UDRS->flags) || |
3818 | test_bit(FD_VERIFY_BIT, &UDRS->flags)); |
3819 | if (!(cf || test_bit(drive, &fake_change) || drive_no_geom(drive))) { |
3820 | process_fd_request(); /*already done by another thread */ |
3821 | return 0; |
3822 | } |
3823 | UDRS->maxblock = 0; |
3824 | UDRS->maxtrack = 0; |
3825 | if (buffer_drive == drive) |
3826 | buffer_track = -1; |
3827 | clear_bit(drive, &fake_change); |
3828 | clear_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
3829 | if (cf) |
3830 | UDRS->generation++; |
3831 | if (drive_no_geom(drive)) { |
3832 | /* auto-sensing */ |
3833 | res = __floppy_read_block_0(opened_bdev[drive]); |
3834 | } else { |
3835 | if (cf) |
3836 | poll_drive(false, FD_RAW_NEED_DISK); |
3837 | process_fd_request(); |
3838 | } |
3839 | } |
3840 | set_capacity(disk, floppy_sizes[UDRS->fd_device]); |
3841 | return res; |
3842 | } |
3843 | |
3844 | static const struct block_device_operations floppy_fops = { |
3845 | .owner = THIS_MODULE, |
3846 | .open = floppy_open, |
3847 | .release = floppy_release, |
3848 | .ioctl = fd_ioctl, |
3849 | .getgeo = fd_getgeo, |
3850 | .check_events = floppy_check_events, |
3851 | .revalidate_disk = floppy_revalidate, |
3852 | }; |
3853 | |
3854 | /* |
3855 | * Floppy Driver initialization |
3856 | * ============================= |
3857 | */ |
3858 | |
3859 | /* Determine the floppy disk controller type */ |
3860 | /* This routine was written by David C. Niemi */ |
3861 | static char __init get_fdc_version(void) |
3862 | { |
3863 | int r; |
3864 | |
3865 | output_byte(FD_DUMPREGS); /* 82072 and better know DUMPREGS */ |
3866 | if (FDCS->reset) |
3867 | return FDC_NONE; |
3868 | r = result(); |
3869 | if (r <= 0x00) |
3870 | return FDC_NONE; /* No FDC present ??? */ |
3871 | if ((r == 1) && (reply_buffer[0] == 0x80)) { |
3872 | pr_info("FDC %d is an 8272A\n", fdc); |
3873 | return FDC_8272A; /* 8272a/765 don't know DUMPREGS */ |
3874 | } |
3875 | if (r != 10) { |
3876 | pr_info("FDC %d init: DUMPREGS: unexpected return of %d bytes.\n", |
3877 | fdc, r); |
3878 | return FDC_UNKNOWN; |
3879 | } |
3880 | |
3881 | if (!fdc_configure()) { |
3882 | pr_info("FDC %d is an 82072\n", fdc); |
3883 | return FDC_82072; /* 82072 doesn't know CONFIGURE */ |
3884 | } |
3885 | |
3886 | output_byte(FD_PERPENDICULAR); |
3887 | if (need_more_output() == MORE_OUTPUT) { |
3888 | output_byte(0); |
3889 | } else { |
3890 | pr_info("FDC %d is an 82072A\n", fdc); |
3891 | return FDC_82072A; /* 82072A as found on Sparcs. */ |
3892 | } |
3893 | |
3894 | output_byte(FD_UNLOCK); |
3895 | r = result(); |
3896 | if ((r == 1) && (reply_buffer[0] == 0x80)) { |
3897 | pr_info("FDC %d is a pre-1991 82077\n", fdc); |
3898 | return FDC_82077_ORIG; /* Pre-1991 82077, doesn't know |
3899 | * LOCK/UNLOCK */ |
3900 | } |
3901 | if ((r != 1) || (reply_buffer[0] != 0x00)) { |
3902 | pr_info("FDC %d init: UNLOCK: unexpected return of %d bytes.\n", |
3903 | fdc, r); |
3904 | return FDC_UNKNOWN; |
3905 | } |
3906 | output_byte(FD_PARTID); |
3907 | r = result(); |
3908 | if (r != 1) { |
3909 | pr_info("FDC %d init: PARTID: unexpected return of %d bytes.\n", |
3910 | fdc, r); |
3911 | return FDC_UNKNOWN; |
3912 | } |
3913 | if (reply_buffer[0] == 0x80) { |
3914 | pr_info("FDC %d is a post-1991 82077\n", fdc); |
3915 | return FDC_82077; /* Revised 82077AA passes all the tests */ |
3916 | } |
3917 | switch (reply_buffer[0] >> 5) { |
3918 | case 0x0: |
3919 | /* Either a 82078-1 or a 82078SL running at 5Volt */ |
3920 | pr_info("FDC %d is an 82078.\n", fdc); |
3921 | return FDC_82078; |
3922 | case 0x1: |
3923 | pr_info("FDC %d is a 44pin 82078\n", fdc); |
3924 | return FDC_82078; |
3925 | case 0x2: |
3926 | pr_info("FDC %d is a S82078B\n", fdc); |
3927 | return FDC_S82078B; |
3928 | case 0x3: |
3929 | pr_info("FDC %d is a National Semiconductor PC87306\n", fdc); |
3930 | return FDC_87306; |
3931 | default: |
3932 | pr_info("FDC %d init: 82078 variant with unknown PARTID=%d.\n", |
3933 | fdc, reply_buffer[0] >> 5); |
3934 | return FDC_82078_UNKN; |
3935 | } |
3936 | } /* get_fdc_version */ |
3937 | |
3938 | /* lilo configuration */ |
3939 | |
3940 | static void __init floppy_set_flags(int *ints, int param, int param2) |
3941 | { |
3942 | int i; |
3943 | |
3944 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { |
3945 | if (param) |
3946 | default_drive_params[i].params.flags |= param2; |
3947 | else |
3948 | default_drive_params[i].params.flags &= ~param2; |
3949 | } |
3950 | DPRINT("%s flag 0x%x\n", param2 ? "Setting" : "Clearing", param); |
3951 | } |
3952 | |
3953 | static void __init daring(int *ints, int param, int param2) |
3954 | { |
3955 | int i; |
3956 | |
3957 | for (i = 0; i < ARRAY_SIZE(default_drive_params); i++) { |
3958 | if (param) { |
3959 | default_drive_params[i].params.select_delay = 0; |
3960 | default_drive_params[i].params.flags |= |
3961 | FD_SILENT_DCL_CLEAR; |
3962 | } else { |
3963 | default_drive_params[i].params.select_delay = |
3964 | 2 * HZ / 100; |
3965 | default_drive_params[i].params.flags &= |
3966 | ~FD_SILENT_DCL_CLEAR; |
3967 | } |
3968 | } |
3969 | DPRINT("Assuming %s floppy hardware\n", param ? "standard" : "broken"); |
3970 | } |
3971 | |
3972 | static void __init set_cmos(int *ints, int dummy, int dummy2) |
3973 | { |
3974 | int current_drive = 0; |
3975 | |
3976 | if (ints[0] != 2) { |
3977 | DPRINT("wrong number of parameters for CMOS\n"); |
3978 | return; |
3979 | } |
3980 | current_drive = ints[1]; |
3981 | if (current_drive < 0 || current_drive >= 8) { |
3982 | DPRINT("bad drive for set_cmos\n"); |
3983 | return; |
3984 | } |
3985 | #if N_FDC > 1 |
3986 | if (current_drive >= 4 && !FDC2) |
3987 | FDC2 = 0x370; |
3988 | #endif |
3989 | DP->cmos = ints[2]; |
3990 | DPRINT("setting CMOS code to %d\n", ints[2]); |
3991 | } |
3992 | |
3993 | static struct param_table { |
3994 | const char *name; |
3995 | void (*fn) (int *ints, int param, int param2); |
3996 | int *var; |
3997 | int def_param; |
3998 | int param2; |
3999 | } config_params[] __initdata = { |
4000 | {"allowed_drive_mask", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ |
4001 | {"all_drives", NULL, &allowed_drive_mask, 0xff, 0}, /* obsolete */ |
4002 | {"asus_pci", NULL, &allowed_drive_mask, 0x33, 0}, |
4003 | {"irq", NULL, &FLOPPY_IRQ, 6, 0}, |
4004 | {"dma", NULL, &FLOPPY_DMA, 2, 0}, |
4005 | {"daring", daring, NULL, 1, 0}, |
4006 | #if N_FDC > 1 |
4007 | {"two_fdc", NULL, &FDC2, 0x370, 0}, |
4008 | {"one_fdc", NULL, &FDC2, 0, 0}, |
4009 | #endif |
4010 | {"thinkpad", floppy_set_flags, NULL, 1, FD_INVERTED_DCL}, |
4011 | {"broken_dcl", floppy_set_flags, NULL, 1, FD_BROKEN_DCL}, |
4012 | {"messages", floppy_set_flags, NULL, 1, FTD_MSG}, |
4013 | {"silent_dcl_clear", floppy_set_flags, NULL, 1, FD_SILENT_DCL_CLEAR}, |
4014 | {"debug", floppy_set_flags, NULL, 1, FD_DEBUG}, |
4015 | {"nodma", NULL, &can_use_virtual_dma, 1, 0}, |
4016 | {"omnibook", NULL, &can_use_virtual_dma, 1, 0}, |
4017 | {"yesdma", NULL, &can_use_virtual_dma, 0, 0}, |
4018 | {"fifo_depth", NULL, &fifo_depth, 0xa, 0}, |
4019 | {"nofifo", NULL, &no_fifo, 0x20, 0}, |
4020 | {"usefifo", NULL, &no_fifo, 0, 0}, |
4021 | {"cmos", set_cmos, NULL, 0, 0}, |
4022 | {"slow", NULL, &slow_floppy, 1, 0}, |
4023 | {"unexpected_interrupts", NULL, &print_unex, 1, 0}, |
4024 | {"no_unexpected_interrupts", NULL, &print_unex, 0, 0}, |
4025 | {"L40SX", NULL, &print_unex, 0, 0} |
4026 | |
4027 | EXTRA_FLOPPY_PARAMS |
4028 | }; |
4029 | |
4030 | static int __init floppy_setup(char *str) |
4031 | { |
4032 | int i; |
4033 | int param; |
4034 | int ints[11]; |
4035 | |
4036 | str = get_options(str, ARRAY_SIZE(ints), ints); |
4037 | if (str) { |
4038 | for (i = 0; i < ARRAY_SIZE(config_params); i++) { |
4039 | if (strcmp(str, config_params[i].name) == 0) { |
4040 | if (ints[0]) |
4041 | param = ints[1]; |
4042 | else |
4043 | param = config_params[i].def_param; |
4044 | if (config_params[i].fn) |
4045 | config_params[i].fn(ints, param, |
4046 | config_params[i]. |
4047 | param2); |
4048 | if (config_params[i].var) { |
4049 | DPRINT("%s=%d\n", str, param); |
4050 | *config_params[i].var = param; |
4051 | } |
4052 | return 1; |
4053 | } |
4054 | } |
4055 | } |
4056 | if (str) { |
4057 | DPRINT("unknown floppy option [%s]\n", str); |
4058 | |
4059 | DPRINT("allowed options are:"); |
4060 | for (i = 0; i < ARRAY_SIZE(config_params); i++) |
4061 | pr_cont(" %s", config_params[i].name); |
4062 | pr_cont("\n"); |
4063 | } else |
4064 | DPRINT("botched floppy option\n"); |
4065 | DPRINT("Read Documentation/blockdev/floppy.txt\n"); |
4066 | return 0; |
4067 | } |
4068 | |
4069 | static int have_no_fdc = -ENODEV; |
4070 | |
4071 | static ssize_t floppy_cmos_show(struct device *dev, |
4072 | struct device_attribute *attr, char *buf) |
4073 | { |
4074 | struct platform_device *p = to_platform_device(dev); |
4075 | int drive; |
4076 | |
4077 | drive = p->id; |
4078 | return sprintf(buf, "%X\n", UDP->cmos); |
4079 | } |
4080 | |
4081 | static DEVICE_ATTR(cmos, S_IRUGO, floppy_cmos_show, NULL); |
4082 | |
4083 | static void floppy_device_release(struct device *dev) |
4084 | { |
4085 | } |
4086 | |
4087 | static int floppy_resume(struct device *dev) |
4088 | { |
4089 | int fdc; |
4090 | |
4091 | for (fdc = 0; fdc < N_FDC; fdc++) |
4092 | if (FDCS->address != -1) |
4093 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
4094 | |
4095 | return 0; |
4096 | } |
4097 | |
4098 | static const struct dev_pm_ops floppy_pm_ops = { |
4099 | .resume = floppy_resume, |
4100 | .restore = floppy_resume, |
4101 | }; |
4102 | |
4103 | static struct platform_driver floppy_driver = { |
4104 | .driver = { |
4105 | .name = "floppy", |
4106 | .pm = &floppy_pm_ops, |
4107 | }, |
4108 | }; |
4109 | |
4110 | static struct platform_device floppy_device[N_DRIVE]; |
4111 | |
4112 | static bool floppy_available(int drive) |
4113 | { |
4114 | if (!(allowed_drive_mask & (1 << drive))) |
4115 | return false; |
4116 | if (fdc_state[FDC(drive)].version == FDC_NONE) |
4117 | return false; |
4118 | return true; |
4119 | } |
4120 | |
4121 | static struct kobject *floppy_find(dev_t dev, int *part, void *data) |
4122 | { |
4123 | int drive = (*part & 3) | ((*part & 0x80) >> 5); |
4124 | if (drive >= N_DRIVE || !floppy_available(drive)) |
4125 | return NULL; |
4126 | if (((*part >> 2) & 0x1f) >= ARRAY_SIZE(floppy_type)) |
4127 | return NULL; |
4128 | *part = 0; |
4129 | return get_disk(disks[drive]); |
4130 | } |
4131 | |
4132 | static int __init do_floppy_init(void) |
4133 | { |
4134 | int i, unit, drive, err; |
4135 | |
4136 | set_debugt(); |
4137 | interruptjiffies = resultjiffies = jiffies; |
4138 | |
4139 | #if defined(CONFIG_PPC) |
4140 | if (check_legacy_ioport(FDC1)) |
4141 | return -ENODEV; |
4142 | #endif |
4143 | |
4144 | raw_cmd = NULL; |
4145 | |
4146 | floppy_wq = alloc_ordered_workqueue("floppy", 0); |
4147 | if (!floppy_wq) |
4148 | return -ENOMEM; |
4149 | |
4150 | for (drive = 0; drive < N_DRIVE; drive++) { |
4151 | disks[drive] = alloc_disk(1); |
4152 | if (!disks[drive]) { |
4153 | err = -ENOMEM; |
4154 | goto out_put_disk; |
4155 | } |
4156 | |
4157 | disks[drive]->queue = blk_init_queue(do_fd_request, &floppy_lock); |
4158 | if (!disks[drive]->queue) { |
4159 | err = -ENOMEM; |
4160 | goto out_put_disk; |
4161 | } |
4162 | |
4163 | blk_queue_max_hw_sectors(disks[drive]->queue, 64); |
4164 | disks[drive]->major = FLOPPY_MAJOR; |
4165 | disks[drive]->first_minor = TOMINOR(drive); |
4166 | disks[drive]->fops = &floppy_fops; |
4167 | sprintf(disks[drive]->disk_name, "fd%d", drive); |
4168 | |
4169 | init_timer(&motor_off_timer[drive]); |
4170 | motor_off_timer[drive].data = drive; |
4171 | motor_off_timer[drive].function = motor_off_callback; |
4172 | } |
4173 | |
4174 | err = register_blkdev(FLOPPY_MAJOR, "fd"); |
4175 | if (err) |
4176 | goto out_put_disk; |
4177 | |
4178 | err = platform_driver_register(&floppy_driver); |
4179 | if (err) |
4180 | goto out_unreg_blkdev; |
4181 | |
4182 | blk_register_region(MKDEV(FLOPPY_MAJOR, 0), 256, THIS_MODULE, |
4183 | floppy_find, NULL, NULL); |
4184 | |
4185 | for (i = 0; i < 256; i++) |
4186 | if (ITYPE(i)) |
4187 | floppy_sizes[i] = floppy_type[ITYPE(i)].size; |
4188 | else |
4189 | floppy_sizes[i] = MAX_DISK_SIZE << 1; |
4190 | |
4191 | reschedule_timeout(MAXTIMEOUT, "floppy init"); |
4192 | config_types(); |
4193 | |
4194 | for (i = 0; i < N_FDC; i++) { |
4195 | fdc = i; |
4196 | memset(FDCS, 0, sizeof(*FDCS)); |
4197 | FDCS->dtr = -1; |
4198 | FDCS->dor = 0x4; |
4199 | #if defined(__sparc__) || defined(__mc68000__) |
4200 | /*sparcs/sun3x don't have a DOR reset which we can fall back on to */ |
4201 | #ifdef __mc68000__ |
4202 | if (MACH_IS_SUN3X) |
4203 | #endif |
4204 | FDCS->version = FDC_82072A; |
4205 | #endif |
4206 | } |
4207 | |
4208 | use_virtual_dma = can_use_virtual_dma & 1; |
4209 | fdc_state[0].address = FDC1; |
4210 | if (fdc_state[0].address == -1) { |
4211 | cancel_delayed_work(&fd_timeout); |
4212 | err = -ENODEV; |
4213 | goto out_unreg_region; |
4214 | } |
4215 | #if N_FDC > 1 |
4216 | fdc_state[1].address = FDC2; |
4217 | #endif |
4218 | |
4219 | fdc = 0; /* reset fdc in case of unexpected interrupt */ |
4220 | err = floppy_grab_irq_and_dma(); |
4221 | if (err) { |
4222 | cancel_delayed_work(&fd_timeout); |
4223 | err = -EBUSY; |
4224 | goto out_unreg_region; |
4225 | } |
4226 | |
4227 | /* initialise drive state */ |
4228 | for (drive = 0; drive < N_DRIVE; drive++) { |
4229 | memset(UDRS, 0, sizeof(*UDRS)); |
4230 | memset(UDRWE, 0, sizeof(*UDRWE)); |
4231 | set_bit(FD_DISK_NEWCHANGE_BIT, &UDRS->flags); |
4232 | set_bit(FD_DISK_CHANGED_BIT, &UDRS->flags); |
4233 | set_bit(FD_VERIFY_BIT, &UDRS->flags); |
4234 | UDRS->fd_device = -1; |
4235 | floppy_track_buffer = NULL; |
4236 | max_buffer_sectors = 0; |
4237 | } |
4238 | /* |
4239 | * Small 10 msec delay to let through any interrupt that |
4240 | * initialization might have triggered, to not |
4241 | * confuse detection: |
4242 | */ |
4243 | msleep(10); |
4244 | |
4245 | for (i = 0; i < N_FDC; i++) { |
4246 | fdc = i; |
4247 | FDCS->driver_version = FD_DRIVER_VERSION; |
4248 | for (unit = 0; unit < 4; unit++) |
4249 | FDCS->track[unit] = 0; |
4250 | if (FDCS->address == -1) |
4251 | continue; |
4252 | FDCS->rawcmd = 2; |
4253 | if (user_reset_fdc(-1, FD_RESET_ALWAYS, false)) { |
4254 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
4255 | floppy_release_regions(fdc); |
4256 | FDCS->address = -1; |
4257 | FDCS->version = FDC_NONE; |
4258 | continue; |
4259 | } |
4260 | /* Try to determine the floppy controller type */ |
4261 | FDCS->version = get_fdc_version(); |
4262 | if (FDCS->version == FDC_NONE) { |
4263 | /* free ioports reserved by floppy_grab_irq_and_dma() */ |
4264 | floppy_release_regions(fdc); |
4265 | FDCS->address = -1; |
4266 | continue; |
4267 | } |
4268 | if (can_use_virtual_dma == 2 && FDCS->version < FDC_82072A) |
4269 | can_use_virtual_dma = 0; |
4270 | |
4271 | have_no_fdc = 0; |
4272 | /* Not all FDCs seem to be able to handle the version command |
4273 | * properly, so force a reset for the standard FDC clones, |
4274 | * to avoid interrupt garbage. |
4275 | */ |
4276 | user_reset_fdc(-1, FD_RESET_ALWAYS, false); |
4277 | } |
4278 | fdc = 0; |
4279 | cancel_delayed_work(&fd_timeout); |
4280 | current_drive = 0; |
4281 | initialized = true; |
4282 | if (have_no_fdc) { |
4283 | DPRINT("no floppy controllers found\n"); |
4284 | err = have_no_fdc; |
4285 | goto out_release_dma; |
4286 | } |
4287 | |
4288 | for (drive = 0; drive < N_DRIVE; drive++) { |
4289 | if (!floppy_available(drive)) |
4290 | continue; |
4291 | |
4292 | floppy_device[drive].name = floppy_device_name; |
4293 | floppy_device[drive].id = drive; |
4294 | floppy_device[drive].dev.release = floppy_device_release; |
4295 | |
4296 | err = platform_device_register(&floppy_device[drive]); |
4297 | if (err) |
4298 | goto out_remove_drives; |
4299 | |
4300 | err = device_create_file(&floppy_device[drive].dev, |
4301 | &dev_attr_cmos); |
4302 | if (err) |
4303 | goto out_unreg_platform_dev; |
4304 | |
4305 | /* to be cleaned up... */ |
4306 | disks[drive]->private_data = (void *)(long)drive; |
4307 | disks[drive]->flags |= GENHD_FL_REMOVABLE; |
4308 | disks[drive]->driverfs_dev = &floppy_device[drive].dev; |
4309 | add_disk(disks[drive]); |
4310 | } |
4311 | |
4312 | return 0; |
4313 | |
4314 | out_unreg_platform_dev: |
4315 | platform_device_unregister(&floppy_device[drive]); |
4316 | out_remove_drives: |
4317 | while (drive--) { |
4318 | if (floppy_available(drive)) { |
4319 | del_gendisk(disks[drive]); |
4320 | device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); |
4321 | platform_device_unregister(&floppy_device[drive]); |
4322 | } |
4323 | } |
4324 | out_release_dma: |
4325 | if (atomic_read(&usage_count)) |
4326 | floppy_release_irq_and_dma(); |
4327 | out_unreg_region: |
4328 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4329 | platform_driver_unregister(&floppy_driver); |
4330 | out_unreg_blkdev: |
4331 | unregister_blkdev(FLOPPY_MAJOR, "fd"); |
4332 | out_put_disk: |
4333 | destroy_workqueue(floppy_wq); |
4334 | for (drive = 0; drive < N_DRIVE; drive++) { |
4335 | if (!disks[drive]) |
4336 | break; |
4337 | if (disks[drive]->queue) { |
4338 | del_timer_sync(&motor_off_timer[drive]); |
4339 | blk_cleanup_queue(disks[drive]->queue); |
4340 | disks[drive]->queue = NULL; |
4341 | } |
4342 | put_disk(disks[drive]); |
4343 | } |
4344 | return err; |
4345 | } |
4346 | |
4347 | #ifndef MODULE |
4348 | static __init void floppy_async_init(void *data, async_cookie_t cookie) |
4349 | { |
4350 | do_floppy_init(); |
4351 | } |
4352 | #endif |
4353 | |
4354 | static int __init floppy_init(void) |
4355 | { |
4356 | #ifdef MODULE |
4357 | return do_floppy_init(); |
4358 | #else |
4359 | /* Don't hold up the bootup by the floppy initialization */ |
4360 | async_schedule(floppy_async_init, NULL); |
4361 | return 0; |
4362 | #endif |
4363 | } |
4364 | |
4365 | static const struct io_region { |
4366 | int offset; |
4367 | int size; |
4368 | } io_regions[] = { |
4369 | { 2, 1 }, |
4370 | /* address + 3 is sometimes reserved by pnp bios for motherboard */ |
4371 | { 4, 2 }, |
4372 | /* address + 6 is reserved, and may be taken by IDE. |
4373 | * Unfortunately, Adaptec doesn't know this :-(, */ |
4374 | { 7, 1 }, |
4375 | }; |
4376 | |
4377 | static void floppy_release_allocated_regions(int fdc, const struct io_region *p) |
4378 | { |
4379 | while (p != io_regions) { |
4380 | p--; |
4381 | release_region(FDCS->address + p->offset, p->size); |
4382 | } |
4383 | } |
4384 | |
4385 | #define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) |
4386 | |
4387 | static int floppy_request_regions(int fdc) |
4388 | { |
4389 | const struct io_region *p; |
4390 | |
4391 | for (p = io_regions; p < ARRAY_END(io_regions); p++) { |
4392 | if (!request_region(FDCS->address + p->offset, |
4393 | p->size, "floppy")) { |
4394 | DPRINT("Floppy io-port 0x%04lx in use\n", |
4395 | FDCS->address + p->offset); |
4396 | floppy_release_allocated_regions(fdc, p); |
4397 | return -EBUSY; |
4398 | } |
4399 | } |
4400 | return 0; |
4401 | } |
4402 | |
4403 | static void floppy_release_regions(int fdc) |
4404 | { |
4405 | floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); |
4406 | } |
4407 | |
4408 | static int floppy_grab_irq_and_dma(void) |
4409 | { |
4410 | if (atomic_inc_return(&usage_count) > 1) |
4411 | return 0; |
4412 | |
4413 | /* |
4414 | * We might have scheduled a free_irq(), wait it to |
4415 | * drain first: |
4416 | */ |
4417 | flush_workqueue(floppy_wq); |
4418 | |
4419 | if (fd_request_irq()) { |
4420 | DPRINT("Unable to grab IRQ%d for the floppy driver\n", |
4421 | FLOPPY_IRQ); |
4422 | atomic_dec(&usage_count); |
4423 | return -1; |
4424 | } |
4425 | if (fd_request_dma()) { |
4426 | DPRINT("Unable to grab DMA%d for the floppy driver\n", |
4427 | FLOPPY_DMA); |
4428 | if (can_use_virtual_dma & 2) |
4429 | use_virtual_dma = can_use_virtual_dma = 1; |
4430 | if (!(can_use_virtual_dma & 1)) { |
4431 | fd_free_irq(); |
4432 | atomic_dec(&usage_count); |
4433 | return -1; |
4434 | } |
4435 | } |
4436 | |
4437 | for (fdc = 0; fdc < N_FDC; fdc++) { |
4438 | if (FDCS->address != -1) { |
4439 | if (floppy_request_regions(fdc)) |
4440 | goto cleanup; |
4441 | } |
4442 | } |
4443 | for (fdc = 0; fdc < N_FDC; fdc++) { |
4444 | if (FDCS->address != -1) { |
4445 | reset_fdc_info(1); |
4446 | fd_outb(FDCS->dor, FD_DOR); |
4447 | } |
4448 | } |
4449 | fdc = 0; |
4450 | set_dor(0, ~0, 8); /* avoid immediate interrupt */ |
4451 | |
4452 | for (fdc = 0; fdc < N_FDC; fdc++) |
4453 | if (FDCS->address != -1) |
4454 | fd_outb(FDCS->dor, FD_DOR); |
4455 | /* |
4456 | * The driver will try and free resources and relies on us |
4457 | * to know if they were allocated or not. |
4458 | */ |
4459 | fdc = 0; |
4460 | irqdma_allocated = 1; |
4461 | return 0; |
4462 | cleanup: |
4463 | fd_free_irq(); |
4464 | fd_free_dma(); |
4465 | while (--fdc >= 0) |
4466 | floppy_release_regions(fdc); |
4467 | atomic_dec(&usage_count); |
4468 | return -1; |
4469 | } |
4470 | |
4471 | static void floppy_release_irq_and_dma(void) |
4472 | { |
4473 | int old_fdc; |
4474 | #ifndef __sparc__ |
4475 | int drive; |
4476 | #endif |
4477 | long tmpsize; |
4478 | unsigned long tmpaddr; |
4479 | |
4480 | if (!atomic_dec_and_test(&usage_count)) |
4481 | return; |
4482 | |
4483 | if (irqdma_allocated) { |
4484 | fd_disable_dma(); |
4485 | fd_free_dma(); |
4486 | fd_free_irq(); |
4487 | irqdma_allocated = 0; |
4488 | } |
4489 | set_dor(0, ~0, 8); |
4490 | #if N_FDC > 1 |
4491 | set_dor(1, ~8, 0); |
4492 | #endif |
4493 | |
4494 | if (floppy_track_buffer && max_buffer_sectors) { |
4495 | tmpsize = max_buffer_sectors * 1024; |
4496 | tmpaddr = (unsigned long)floppy_track_buffer; |
4497 | floppy_track_buffer = NULL; |
4498 | max_buffer_sectors = 0; |
4499 | buffer_min = buffer_max = -1; |
4500 | fd_dma_mem_free(tmpaddr, tmpsize); |
4501 | } |
4502 | #ifndef __sparc__ |
4503 | for (drive = 0; drive < N_FDC * 4; drive++) |
4504 | if (timer_pending(motor_off_timer + drive)) |
4505 | pr_info("motor off timer %d still active\n", drive); |
4506 | #endif |
4507 | |
4508 | if (delayed_work_pending(&fd_timeout)) |
4509 | pr_info("floppy timer still active:%s\n", timeout_message); |
4510 | if (delayed_work_pending(&fd_timer)) |
4511 | pr_info("auxiliary floppy timer still active\n"); |
4512 | if (work_pending(&floppy_work)) |
4513 | pr_info("work still pending\n"); |
4514 | old_fdc = fdc; |
4515 | for (fdc = 0; fdc < N_FDC; fdc++) |
4516 | if (FDCS->address != -1) |
4517 | floppy_release_regions(fdc); |
4518 | fdc = old_fdc; |
4519 | } |
4520 | |
4521 | #ifdef MODULE |
4522 | |
4523 | static char *floppy; |
4524 | |
4525 | static void __init parse_floppy_cfg_string(char *cfg) |
4526 | { |
4527 | char *ptr; |
4528 | |
4529 | while (*cfg) { |
4530 | ptr = cfg; |
4531 | while (*cfg && *cfg != ' ' && *cfg != '\t') |
4532 | cfg++; |
4533 | if (*cfg) { |
4534 | *cfg = '\0'; |
4535 | cfg++; |
4536 | } |
4537 | if (*ptr) |
4538 | floppy_setup(ptr); |
4539 | } |
4540 | } |
4541 | |
4542 | static int __init floppy_module_init(void) |
4543 | { |
4544 | if (floppy) |
4545 | parse_floppy_cfg_string(floppy); |
4546 | return floppy_init(); |
4547 | } |
4548 | module_init(floppy_module_init); |
4549 | |
4550 | static void __exit floppy_module_exit(void) |
4551 | { |
4552 | int drive; |
4553 | |
4554 | blk_unregister_region(MKDEV(FLOPPY_MAJOR, 0), 256); |
4555 | unregister_blkdev(FLOPPY_MAJOR, "fd"); |
4556 | platform_driver_unregister(&floppy_driver); |
4557 | |
4558 | destroy_workqueue(floppy_wq); |
4559 | |
4560 | for (drive = 0; drive < N_DRIVE; drive++) { |
4561 | del_timer_sync(&motor_off_timer[drive]); |
4562 | |
4563 | if (floppy_available(drive)) { |
4564 | del_gendisk(disks[drive]); |
4565 | device_remove_file(&floppy_device[drive].dev, &dev_attr_cmos); |
4566 | platform_device_unregister(&floppy_device[drive]); |
4567 | } |
4568 | blk_cleanup_queue(disks[drive]->queue); |
4569 | |
4570 | /* |
4571 | * These disks have not called add_disk(). Don't put down |
4572 | * queue reference in put_disk(). |
4573 | */ |
4574 | if (!(allowed_drive_mask & (1 << drive)) || |
4575 | fdc_state[FDC(drive)].version == FDC_NONE) |
4576 | disks[drive]->queue = NULL; |
4577 | |
4578 | put_disk(disks[drive]); |
4579 | } |
4580 | |
4581 | cancel_delayed_work_sync(&fd_timeout); |
4582 | cancel_delayed_work_sync(&fd_timer); |
4583 | |
4584 | if (atomic_read(&usage_count)) |
4585 | floppy_release_irq_and_dma(); |
4586 | |
4587 | /* eject disk, if any */ |
4588 | fd_eject(0); |
4589 | } |
4590 | |
4591 | module_exit(floppy_module_exit); |
4592 | |
4593 | module_param(floppy, charp, 0); |
4594 | module_param(FLOPPY_IRQ, int, 0); |
4595 | module_param(FLOPPY_DMA, int, 0); |
4596 | MODULE_AUTHOR("Alain L. Knaff"); |
4597 | MODULE_SUPPORTED_DEVICE("fd"); |
4598 | MODULE_LICENSE("GPL"); |
4599 | |
4600 | /* This doesn't actually get used other than for module information */ |
4601 | static const struct pnp_device_id floppy_pnpids[] = { |
4602 | {"PNP0700", 0}, |
4603 | {} |
4604 | }; |
4605 | |
4606 | MODULE_DEVICE_TABLE(pnp, floppy_pnpids); |
4607 | |
4608 | #else |
4609 | |
4610 | __setup("floppy=", floppy_setup); |
4611 | module_init(floppy_init) |
4612 | #endif |
4613 | |
4614 | MODULE_ALIAS_BLOCKDEV_MAJOR(FLOPPY_MAJOR); |
4615 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9