Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Mostly written by Mark Lord <mlord@pobox.com> | |
8 | * and Gadi Oxman <gadio@netvision.net.il> | |
9 | * and Andre Hedrick <andre@linux-ide.org> | |
10 | * | |
11 | * See linux/MAINTAINERS for address of current maintainer. | |
12 | * | |
13 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
14 | * | |
bbe4d6d8 BZ |
15 | * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
16 | * by Andrea Arcangeli | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/genhd.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ide.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/kmod.h> | |
34 | #include <linux/pci.h> | |
dc81785d | 35 | #include <linux/scatterlist.h> |
1da177e4 LT |
36 | |
37 | #include <asm/byteorder.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
40 | #include <asm/io.h> | |
41 | ||
42 | /** | |
43 | * generic_id - add a generic drive id | |
44 | * @drive: drive to make an ID block for | |
45 | * | |
46 | * Add a fake id field to the drive we are passed. This allows | |
47 | * use to skip a ton of NULL checks (which people always miss) | |
48 | * and make drive properties unconditional outside of this file | |
49 | */ | |
50 | ||
51 | static void generic_id(ide_drive_t *drive) | |
52 | { | |
53 | drive->id->cyls = drive->cyl; | |
54 | drive->id->heads = drive->head; | |
55 | drive->id->sectors = drive->sect; | |
56 | drive->id->cur_cyls = drive->cyl; | |
57 | drive->id->cur_heads = drive->head; | |
58 | drive->id->cur_sectors = drive->sect; | |
59 | } | |
60 | ||
61 | static void ide_disk_init_chs(ide_drive_t *drive) | |
62 | { | |
63 | struct hd_driveid *id = drive->id; | |
64 | ||
65 | /* Extract geometry if we did not already have one for the drive */ | |
66 | if (!drive->cyl || !drive->head || !drive->sect) { | |
67 | drive->cyl = drive->bios_cyl = id->cyls; | |
68 | drive->head = drive->bios_head = id->heads; | |
69 | drive->sect = drive->bios_sect = id->sectors; | |
70 | } | |
71 | ||
72 | /* Handle logical geometry translation by the drive */ | |
73 | if ((id->field_valid & 1) && id->cur_cyls && | |
74 | id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { | |
75 | drive->cyl = id->cur_cyls; | |
76 | drive->head = id->cur_heads; | |
77 | drive->sect = id->cur_sectors; | |
78 | } | |
79 | ||
80 | /* Use physical geometry if what we have still makes no sense */ | |
81 | if (drive->head > 16 && id->heads && id->heads <= 16) { | |
82 | drive->cyl = id->cyls; | |
83 | drive->head = id->heads; | |
84 | drive->sect = id->sectors; | |
85 | } | |
86 | } | |
87 | ||
88 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
89 | { | |
90 | struct hd_driveid *id = drive->id; | |
91 | ||
92 | drive->mult_count = 0; | |
93 | if (id->max_multsect) { | |
94 | #ifdef CONFIG_IDEDISK_MULTI_MODE | |
95 | id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; | |
96 | id->multsect_valid = id->multsect ? 1 : 0; | |
4ee06b7e | 97 | drive->mult_req = id->multsect_valid ? id->max_multsect : 0; |
1da177e4 LT |
98 | drive->special.b.set_multmode = drive->mult_req ? 1 : 0; |
99 | #else /* original, pre IDE-NFG, per request of AC */ | |
4ee06b7e | 100 | drive->mult_req = 0; |
1da177e4 LT |
101 | if (drive->mult_req > id->max_multsect) |
102 | drive->mult_req = id->max_multsect; | |
103 | if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) | |
104 | drive->special.b.set_multmode = 1; | |
105 | #endif | |
106 | } | |
107 | } | |
108 | ||
1da177e4 LT |
109 | /** |
110 | * do_identify - identify a drive | |
111 | * @drive: drive to identify | |
112 | * @cmd: command used | |
113 | * | |
114 | * Called when we have issued a drive identify command to | |
115 | * read and parse the results. This function is run with | |
116 | * interrupts disabled. | |
117 | */ | |
118 | ||
119 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
120 | { | |
121 | ide_hwif_t *hwif = HWIF(drive); | |
122 | int bswap = 1; | |
123 | struct hd_driveid *id; | |
124 | ||
125 | id = drive->id; | |
126 | /* read 512 bytes of id info */ | |
127 | hwif->ata_input_data(drive, id, SECTOR_WORDS); | |
128 | ||
129 | drive->id_read = 1; | |
130 | local_irq_enable(); | |
7b9f25b5 BZ |
131 | #ifdef DEBUG |
132 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
133 | ide_dump_identify((u8 *)id); | |
134 | #endif | |
1da177e4 LT |
135 | ide_fix_driveid(id); |
136 | ||
e71bc140 | 137 | #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) |
1da177e4 LT |
138 | /* |
139 | * EATA SCSI controllers do a hardware ATA emulation: | |
140 | * Ignore them if there is a driver for them available. | |
141 | */ | |
142 | if ((id->model[0] == 'P' && id->model[1] == 'M') || | |
143 | (id->model[0] == 'S' && id->model[1] == 'K')) { | |
144 | printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); | |
145 | goto err_misc; | |
146 | } | |
e71bc140 | 147 | #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ |
1da177e4 LT |
148 | |
149 | /* | |
150 | * WIN_IDENTIFY returns little-endian info, | |
151 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
152 | */ | |
153 | if (cmd == WIN_PIDENTIFY) { | |
154 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ | |
155 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ | |
156 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ | |
157 | /* Vertos drives may still be weird */ | |
158 | bswap ^= 1; | |
159 | } | |
160 | ide_fixstring(id->model, sizeof(id->model), bswap); | |
161 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); | |
162 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); | |
163 | ||
699b052a TH |
164 | /* we depend on this a lot! */ |
165 | id->model[sizeof(id->model)-1] = '\0'; | |
166 | ||
1da177e4 LT |
167 | if (strstr(id->model, "E X A B Y T E N E S T")) |
168 | goto err_misc; | |
169 | ||
1da177e4 LT |
170 | printk("%s: %s, ", drive->name, id->model); |
171 | drive->present = 1; | |
172 | drive->dead = 0; | |
173 | ||
174 | /* | |
175 | * Check for an ATAPI device | |
176 | */ | |
177 | if (cmd == WIN_PIDENTIFY) { | |
178 | u8 type = (id->config >> 8) & 0x1f; | |
179 | printk("ATAPI "); | |
180 | switch (type) { | |
181 | case ide_floppy: | |
182 | if (!strstr(id->model, "CD-ROM")) { | |
183 | if (!strstr(id->model, "oppy") && | |
184 | !strstr(id->model, "poyp") && | |
185 | !strstr(id->model, "ZIP")) | |
186 | printk("cdrom or floppy?, assuming "); | |
187 | if (drive->media != ide_cdrom) { | |
188 | printk ("FLOPPY"); | |
189 | drive->removable = 1; | |
190 | break; | |
191 | } | |
192 | } | |
193 | /* Early cdrom models used zero */ | |
194 | type = ide_cdrom; | |
195 | case ide_cdrom: | |
196 | drive->removable = 1; | |
197 | #ifdef CONFIG_PPC | |
198 | /* kludge for Apple PowerBook internal zip */ | |
199 | if (!strstr(id->model, "CD-ROM") && | |
200 | strstr(id->model, "ZIP")) { | |
201 | printk ("FLOPPY"); | |
202 | type = ide_floppy; | |
203 | break; | |
204 | } | |
205 | #endif | |
206 | printk ("CD/DVD-ROM"); | |
207 | break; | |
208 | case ide_tape: | |
209 | printk ("TAPE"); | |
210 | break; | |
211 | case ide_optical: | |
212 | printk ("OPTICAL"); | |
213 | drive->removable = 1; | |
214 | break; | |
215 | default: | |
216 | printk("UNKNOWN (type %d)", type); | |
217 | break; | |
218 | } | |
219 | printk (" drive\n"); | |
220 | drive->media = type; | |
221 | /* an ATAPI device ignores DRDY */ | |
222 | drive->ready_stat = 0; | |
223 | return; | |
224 | } | |
225 | ||
226 | /* | |
227 | * Not an ATAPI device: looks like a "regular" hard disk | |
228 | */ | |
98109337 RP |
229 | |
230 | /* | |
231 | * 0x848a = CompactFlash device | |
232 | * These are *not* removable in Linux definition of the term | |
233 | */ | |
234 | ||
235 | if ((id->config != 0x848a) && (id->config & (1<<7))) | |
1da177e4 LT |
236 | drive->removable = 1; |
237 | ||
1da177e4 | 238 | drive->media = ide_disk; |
98109337 | 239 | printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); |
cd3dbc99 | 240 | |
1da177e4 LT |
241 | return; |
242 | ||
243 | err_misc: | |
244 | kfree(id); | |
245 | drive->present = 0; | |
246 | return; | |
247 | } | |
248 | ||
249 | /** | |
250 | * actual_try_to_identify - send ata/atapi identify | |
251 | * @drive: drive to identify | |
252 | * @cmd: command to use | |
253 | * | |
254 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
255 | * and waits for a response. It also monitors irqs while this is | |
256 | * happening, in hope of automatically determining which one is | |
257 | * being used by the interface. | |
258 | * | |
259 | * Returns: 0 device was identified | |
260 | * 1 device timed-out (no response to identify request) | |
261 | * 2 device aborted the command (refused to identify itself) | |
262 | */ | |
263 | ||
264 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
265 | { | |
266 | ide_hwif_t *hwif = HWIF(drive); | |
c47137a9 | 267 | int use_altstatus = 0, rc; |
1da177e4 LT |
268 | unsigned long timeout; |
269 | u8 s = 0, a = 0; | |
270 | ||
271 | /* take a deep breath */ | |
272 | msleep(50); | |
273 | ||
274 | if (IDE_CONTROL_REG) { | |
c47137a9 BZ |
275 | a = ide_read_altstatus(drive); |
276 | s = ide_read_status(drive); | |
277 | if ((a ^ s) & ~INDEX_STAT) | |
1da177e4 | 278 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
279 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
280 | "instead of ALTSTATUS(0x%02x)\n", | |
281 | drive->name, s, a); | |
282 | else | |
1da177e4 | 283 | /* use non-intrusive polling */ |
c47137a9 BZ |
284 | use_altstatus = 1; |
285 | } | |
1da177e4 LT |
286 | |
287 | /* set features register for atapi | |
288 | * identify command to be sure of reply | |
289 | */ | |
290 | if ((cmd == WIN_PIDENTIFY)) | |
291 | /* disable dma & overlap */ | |
292 | hwif->OUTB(0, IDE_FEATURE_REG); | |
293 | ||
294 | /* ask drive for ID */ | |
295 | hwif->OUTB(cmd, IDE_COMMAND_REG); | |
296 | ||
297 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
298 | timeout += jiffies; | |
299 | do { | |
300 | if (time_after(jiffies, timeout)) { | |
301 | /* drive timed-out */ | |
302 | return 1; | |
303 | } | |
304 | /* give drive a breather */ | |
305 | msleep(50); | |
c47137a9 BZ |
306 | s = use_altstatus ? ide_read_altstatus(drive) |
307 | : ide_read_status(drive); | |
308 | } while (s & BUSY_STAT); | |
1da177e4 LT |
309 | |
310 | /* wait for IRQ and DRQ_STAT */ | |
311 | msleep(50); | |
c47137a9 BZ |
312 | s = ide_read_status(drive); |
313 | ||
314 | if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
315 | unsigned long flags; |
316 | ||
317 | /* local CPU only; some systems need this */ | |
318 | local_irq_save(flags); | |
319 | /* drive returned ID */ | |
320 | do_identify(drive, cmd); | |
321 | /* drive responded with ID */ | |
322 | rc = 0; | |
323 | /* clear drive IRQ */ | |
c47137a9 | 324 | (void)ide_read_status(drive); |
1da177e4 LT |
325 | local_irq_restore(flags); |
326 | } else { | |
327 | /* drive refused ID */ | |
328 | rc = 2; | |
329 | } | |
330 | return rc; | |
331 | } | |
332 | ||
333 | /** | |
334 | * try_to_identify - try to identify a drive | |
335 | * @drive: drive to probe | |
336 | * @cmd: command to use | |
337 | * | |
338 | * Issue the identify command and then do IRQ probing to | |
339 | * complete the identification when needed by finding the | |
340 | * IRQ the drive is attached to | |
341 | */ | |
342 | ||
343 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
344 | { | |
345 | ide_hwif_t *hwif = HWIF(drive); | |
346 | int retval; | |
347 | int autoprobe = 0; | |
348 | unsigned long cookie = 0; | |
349 | ||
350 | /* | |
351 | * Disable device irq unless we need to | |
352 | * probe for it. Otherwise we'll get spurious | |
353 | * interrupts during the identify-phase that | |
354 | * the irq handler isn't expecting. | |
355 | */ | |
356 | if (IDE_CONTROL_REG) { | |
1da177e4 LT |
357 | if (!hwif->irq) { |
358 | autoprobe = 1; | |
359 | cookie = probe_irq_on(); | |
1da177e4 | 360 | } |
81ca6919 | 361 | ide_set_irq(drive, autoprobe); |
1da177e4 LT |
362 | } |
363 | ||
364 | retval = actual_try_to_identify(drive, cmd); | |
365 | ||
366 | if (autoprobe) { | |
367 | int irq; | |
81ca6919 BZ |
368 | |
369 | ide_set_irq(drive, 0); | |
1da177e4 | 370 | /* clear drive IRQ */ |
c47137a9 | 371 | (void)ide_read_status(drive); |
1da177e4 LT |
372 | udelay(5); |
373 | irq = probe_irq_off(cookie); | |
374 | if (!hwif->irq) { | |
375 | if (irq > 0) { | |
376 | hwif->irq = irq; | |
377 | } else { | |
378 | /* Mmmm.. multiple IRQs.. | |
379 | * don't know which was ours | |
380 | */ | |
381 | printk("%s: IRQ probe failed (0x%lx)\n", | |
382 | drive->name, cookie); | |
383 | } | |
384 | } | |
385 | } | |
386 | return retval; | |
387 | } | |
388 | ||
3a5015cc BZ |
389 | static int ide_busy_sleep(ide_hwif_t *hwif) |
390 | { | |
391 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
392 | u8 stat; | |
393 | ||
394 | do { | |
395 | msleep(50); | |
396 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
397 | if ((stat & BUSY_STAT) == 0) | |
398 | return 0; | |
399 | } while (time_before(jiffies, timeout)); | |
400 | ||
401 | return 1; | |
402 | } | |
1da177e4 LT |
403 | |
404 | /** | |
405 | * do_probe - probe an IDE device | |
406 | * @drive: drive to probe | |
407 | * @cmd: command to use | |
408 | * | |
409 | * do_probe() has the difficult job of finding a drive if it exists, | |
410 | * without getting hung up if it doesn't exist, without trampling on | |
411 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
412 | * | |
413 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
414 | * but does not respond right away, the probe will "hang in there" | |
415 | * for the maximum wait time (about 30 seconds), otherwise it will | |
416 | * exit much more quickly. | |
417 | * | |
418 | * Returns: 0 device was identified | |
419 | * 1 device timed-out (no response to identify request) | |
420 | * 2 device aborted the command (refused to identify itself) | |
421 | * 3 bad status from device (possible for ATAPI drives) | |
422 | * 4 probe was not attempted because failure was obvious | |
423 | */ | |
424 | ||
425 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
426 | { | |
1da177e4 | 427 | ide_hwif_t *hwif = HWIF(drive); |
57b55275 BZ |
428 | int rc; |
429 | u8 stat; | |
1da177e4 LT |
430 | |
431 | if (drive->present) { | |
432 | /* avoid waiting for inappropriate probes */ | |
433 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
434 | return 4; | |
435 | } | |
436 | #ifdef DEBUG | |
437 | printk("probing for %s: present=%d, media=%d, probetype=%s\n", | |
438 | drive->name, drive->present, drive->media, | |
439 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
440 | #endif | |
441 | ||
442 | /* needed for some systems | |
443 | * (e.g. crw9624 as drive0 with disk as slave) | |
444 | */ | |
445 | msleep(50); | |
446 | SELECT_DRIVE(drive); | |
447 | msleep(50); | |
448 | if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { | |
449 | if (drive->select.b.unit != 0) { | |
450 | /* exit with drive0 selected */ | |
451 | SELECT_DRIVE(&hwif->drives[0]); | |
452 | /* allow BUSY_STAT to assert & clear */ | |
453 | msleep(50); | |
454 | } | |
455 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
456 | return 3; | |
457 | } | |
458 | ||
c47137a9 BZ |
459 | stat = ide_read_status(drive); |
460 | ||
461 | if (OK_STAT(stat, READY_STAT, BUSY_STAT) || | |
1da177e4 LT |
462 | drive->present || cmd == WIN_PIDENTIFY) { |
463 | /* send cmd and wait */ | |
464 | if ((rc = try_to_identify(drive, cmd))) { | |
465 | /* failed: try again */ | |
466 | rc = try_to_identify(drive,cmd); | |
467 | } | |
57b55275 | 468 | |
c47137a9 | 469 | stat = ide_read_status(drive); |
57b55275 BZ |
470 | |
471 | if (stat == (BUSY_STAT | READY_STAT)) | |
1da177e4 LT |
472 | return 4; |
473 | ||
474 | if ((rc == 1 && cmd == WIN_PIDENTIFY) && | |
475 | ((drive->autotune == IDE_TUNE_DEFAULT) || | |
476 | (drive->autotune == IDE_TUNE_AUTO))) { | |
57b55275 BZ |
477 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
478 | "resetting drive\n", drive->name, stat); | |
1da177e4 LT |
479 | msleep(50); |
480 | hwif->OUTB(drive->select.all, IDE_SELECT_REG); | |
481 | msleep(50); | |
482 | hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); | |
3a5015cc | 483 | (void)ide_busy_sleep(hwif); |
1da177e4 LT |
484 | rc = try_to_identify(drive, cmd); |
485 | } | |
57b55275 BZ |
486 | |
487 | /* ensure drive IRQ is clear */ | |
c47137a9 | 488 | stat = ide_read_status(drive); |
57b55275 | 489 | |
1da177e4 | 490 | if (rc == 1) |
57b55275 BZ |
491 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
492 | drive->name, stat); | |
1da177e4 LT |
493 | } else { |
494 | /* not present or maybe ATAPI */ | |
495 | rc = 3; | |
496 | } | |
497 | if (drive->select.b.unit != 0) { | |
498 | /* exit with drive0 selected */ | |
499 | SELECT_DRIVE(&hwif->drives[0]); | |
500 | msleep(50); | |
501 | /* ensure drive irq is clear */ | |
c47137a9 | 502 | (void)ide_read_status(drive); |
1da177e4 LT |
503 | } |
504 | return rc; | |
505 | } | |
506 | ||
507 | /* | |
508 | * | |
509 | */ | |
510 | static void enable_nest (ide_drive_t *drive) | |
511 | { | |
512 | ide_hwif_t *hwif = HWIF(drive); | |
57b55275 | 513 | u8 stat; |
1da177e4 LT |
514 | |
515 | printk("%s: enabling %s -- ", hwif->name, drive->id->model); | |
516 | SELECT_DRIVE(drive); | |
517 | msleep(50); | |
518 | hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); | |
3a5015cc BZ |
519 | |
520 | if (ide_busy_sleep(hwif)) { | |
521 | printk(KERN_CONT "failed (timeout)\n"); | |
522 | return; | |
523 | } | |
1da177e4 LT |
524 | |
525 | msleep(50); | |
526 | ||
c47137a9 | 527 | stat = ide_read_status(drive); |
57b55275 BZ |
528 | |
529 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
530 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
531 | else | |
532 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
533 | |
534 | /* if !(success||timed-out) */ | |
535 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
536 | /* look for ATAPI device */ | |
537 | (void) do_probe(drive, WIN_PIDENTIFY); | |
538 | } | |
539 | } | |
540 | ||
541 | /** | |
542 | * probe_for_drives - upper level drive probe | |
543 | * @drive: drive to probe for | |
544 | * | |
545 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
546 | * and presents things to the user as needed. | |
547 | * | |
548 | * Returns: 0 no device was found | |
549 | * 1 device was found (note: drive->present might | |
550 | * still be 0) | |
551 | */ | |
552 | ||
553 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
554 | { | |
555 | /* | |
556 | * In order to keep things simple we have an id | |
557 | * block for all drives at all times. If the device | |
558 | * is pre ATA or refuses ATA/ATAPI identify we | |
559 | * will add faked data to this. | |
560 | * | |
561 | * Also note that 0 everywhere means "can't do X" | |
562 | */ | |
563 | ||
f5e3c2fa | 564 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
565 | drive->id_read = 0; |
566 | if(drive->id == NULL) | |
567 | { | |
568 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
569 | return 0; | |
570 | } | |
1da177e4 LT |
571 | strcpy(drive->id->model, "UNKNOWN"); |
572 | ||
573 | /* skip probing? */ | |
574 | if (!drive->noprobe) | |
575 | { | |
576 | /* if !(success||timed-out) */ | |
577 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
578 | /* look for ATAPI device */ | |
579 | (void) do_probe(drive, WIN_PIDENTIFY); | |
580 | } | |
1da177e4 LT |
581 | if (!drive->present) |
582 | /* drive not found */ | |
583 | return 0; | |
78595575 AC |
584 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) |
585 | enable_nest(drive); | |
1da177e4 LT |
586 | |
587 | /* identification failed? */ | |
588 | if (!drive->id_read) { | |
589 | if (drive->media == ide_disk) { | |
590 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
591 | drive->name, drive->cyl, | |
592 | drive->head, drive->sect); | |
593 | } else if (drive->media == ide_cdrom) { | |
594 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
595 | } else { | |
596 | /* nuke it */ | |
597 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
598 | drive->present = 0; | |
599 | } | |
600 | } | |
601 | /* drive was found */ | |
602 | } | |
603 | if(!drive->present) | |
604 | return 0; | |
605 | /* The drive wasn't being helpful. Add generic info only */ | |
606 | if (drive->id_read == 0) { | |
607 | generic_id(drive); | |
608 | return 1; | |
609 | } | |
610 | ||
611 | if (drive->media == ide_disk) { | |
612 | ide_disk_init_chs(drive); | |
613 | ide_disk_init_mult_count(drive); | |
614 | } | |
615 | ||
616 | return drive->present; | |
617 | } | |
618 | ||
619 | static void hwif_release_dev (struct device *dev) | |
620 | { | |
621 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
622 | ||
f36d4024 | 623 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
624 | } |
625 | ||
a14dc574 | 626 | static void ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 627 | { |
349ae23f RD |
628 | int ret; |
629 | ||
1da177e4 LT |
630 | /* register with global device tree */ |
631 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
632 | hwif->gendev.driver_data = hwif; | |
633 | if (hwif->gendev.parent == NULL) { | |
36501650 BZ |
634 | if (hwif->dev) |
635 | hwif->gendev.parent = hwif->dev; | |
1da177e4 LT |
636 | else |
637 | /* Would like to do = &device_legacy */ | |
638 | hwif->gendev.parent = NULL; | |
639 | } | |
640 | hwif->gendev.release = hwif_release_dev; | |
349ae23f RD |
641 | ret = device_register(&hwif->gendev); |
642 | if (ret < 0) | |
643 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", | |
644 | __FUNCTION__, ret); | |
1da177e4 LT |
645 | } |
646 | ||
c860a8f2 BZ |
647 | /** |
648 | * ide_port_wait_ready - wait for port to become ready | |
649 | * @hwif: IDE port | |
650 | * | |
651 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
652 | * platforms. Typical cases are: | |
653 | * | |
654 | * - The firmware hard reset the disk before booting the kernel, | |
655 | * the drive is still doing it's poweron-reset sequence, that | |
656 | * can take up to 30 seconds. | |
657 | * | |
658 | * - The firmware does nothing (or no firmware), the device is | |
659 | * still in POST state (same as above actually). | |
660 | * | |
661 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
662 | * their reset sequence even when they are non-selected slave | |
663 | * devices, thus preventing discovery of the main HD. | |
664 | * | |
665 | * Doing this wait-for-non-busy should not harm any existing | |
666 | * configuration and fix some issues like the above. | |
667 | * | |
668 | * BenH. | |
669 | * | |
670 | * Returns 0 on success, error code (< 0) otherwise. | |
671 | */ | |
672 | ||
673 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 674 | { |
8266105b | 675 | int unit, rc; |
1da177e4 LT |
676 | |
677 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
678 | ||
679 | /* Let HW settle down a bit from whatever init state we | |
680 | * come from */ | |
681 | mdelay(2); | |
682 | ||
683 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
684 | * I know of at least one disk who takes 31 seconds, I use 35 | |
685 | * here to be safe | |
686 | */ | |
687 | rc = ide_wait_not_busy(hwif, 35000); | |
688 | if (rc) | |
689 | return rc; | |
690 | ||
691 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
692 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
693 | ide_drive_t *drive = &hwif->drives[unit]; | |
694 | ||
695 | /* Ignore disks that we will not probe for later. */ | |
696 | if (!drive->noprobe || drive->present) { | |
697 | SELECT_DRIVE(drive); | |
81ca6919 | 698 | ide_set_irq(drive, 1); |
8266105b JS |
699 | mdelay(2); |
700 | rc = ide_wait_not_busy(hwif, 35000); | |
701 | if (rc) | |
702 | goto out; | |
703 | } else | |
704 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
705 | drive->name); | |
706 | } | |
707 | out: | |
1da177e4 | 708 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
709 | if (unit) |
710 | SELECT_DRIVE(&hwif->drives[0]); | |
711 | ||
1da177e4 LT |
712 | return rc; |
713 | } | |
714 | ||
715 | /** | |
716 | * ide_undecoded_slave - look for bad CF adapters | |
f01393e4 | 717 | * @drive1: drive |
1da177e4 LT |
718 | * |
719 | * Analyse the drives on the interface and attempt to decide if we | |
720 | * have the same drive viewed twice. This occurs with crap CF adapters | |
721 | * and PCMCIA sometimes. | |
722 | */ | |
723 | ||
f01393e4 | 724 | void ide_undecoded_slave(ide_drive_t *drive1) |
1da177e4 | 725 | { |
f01393e4 | 726 | ide_drive_t *drive0 = &drive1->hwif->drives[0]; |
1da177e4 | 727 | |
f01393e4 | 728 | if ((drive1->dn & 1) == 0 || drive0->present == 0) |
1da177e4 LT |
729 | return; |
730 | ||
731 | /* If the models don't match they are not the same product */ | |
732 | if (strcmp(drive0->id->model, drive1->id->model)) | |
733 | return; | |
734 | ||
735 | /* Serial numbers do not match */ | |
736 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) | |
737 | return; | |
738 | ||
739 | /* No serial number, thankfully very rare for CF */ | |
740 | if (drive0->id->serial_no[0] == 0) | |
741 | return; | |
742 | ||
743 | /* Appears to be an IDE flash adapter with decode bugs */ | |
744 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
745 | ||
746 | drive1->present = 0; | |
747 | } | |
748 | ||
749 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
750 | ||
9d501529 | 751 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 752 | { |
1da177e4 LT |
753 | unsigned long flags; |
754 | unsigned int irqd; | |
a14dc574 BZ |
755 | int unit, rc = -ENODEV; |
756 | ||
757 | BUG_ON(hwif->present); | |
1da177e4 | 758 | |
c53ea18d BZ |
759 | if (hwif->noprobe || |
760 | (hwif->drives[0].noprobe && hwif->drives[1].noprobe)) | |
9d501529 | 761 | return -EACCES; |
1da177e4 | 762 | |
1da177e4 LT |
763 | /* |
764 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
765 | * we'll install our IRQ driver much later... | |
766 | */ | |
767 | irqd = hwif->irq; | |
768 | if (irqd) | |
769 | disable_irq(hwif->irq); | |
770 | ||
771 | local_irq_set(flags); | |
772 | ||
c860a8f2 | 773 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
774 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
775 | ||
776 | /* | |
f367bed0 BZ |
777 | * Second drive should only exist if first drive was found, |
778 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 779 | */ |
f367bed0 | 780 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 LT |
781 | ide_drive_t *drive = &hwif->drives[unit]; |
782 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
783 | (void) probe_for_drive(drive); | |
a14dc574 BZ |
784 | if (drive->present) |
785 | rc = 0; | |
1da177e4 LT |
786 | } |
787 | if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { | |
1da177e4 LT |
788 | printk(KERN_WARNING "%s: reset\n", hwif->name); |
789 | hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
790 | udelay(10); | |
791 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
3a5015cc | 792 | (void)ide_busy_sleep(hwif); |
1da177e4 LT |
793 | } |
794 | local_irq_restore(flags); | |
795 | /* | |
796 | * Use cached IRQ number. It might be (and is...) changed by probe | |
797 | * code above | |
798 | */ | |
799 | if (irqd) | |
800 | enable_irq(irqd); | |
801 | ||
a14dc574 | 802 | return rc; |
e84e7ea7 BZ |
803 | } |
804 | ||
805 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
806 | { | |
807 | int unit; | |
808 | ||
f01393e4 BZ |
809 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
810 | ide_drive_t *drive = &hwif->drives[unit]; | |
811 | ||
812 | if (drive->present && hwif->quirkproc) | |
813 | hwif->quirkproc(drive); | |
814 | } | |
0380dad4 | 815 | |
1da177e4 LT |
816 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
817 | ide_drive_t *drive = &hwif->drives[unit]; | |
818 | ||
819 | if (drive->present) { | |
26bcb879 BZ |
820 | if (drive->autotune == IDE_TUNE_AUTO) |
821 | ide_set_max_pio(drive); | |
1da177e4 LT |
822 | |
823 | if (drive->autotune != IDE_TUNE_DEFAULT && | |
824 | drive->autotune != IDE_TUNE_AUTO) | |
825 | continue; | |
826 | ||
827 | drive->nice1 = 1; | |
828 | ||
15ce926a | 829 | if (hwif->dma_host_set) |
8c0697cc | 830 | ide_set_dma(drive); |
1da177e4 LT |
831 | } |
832 | } | |
208a08f7 KG |
833 | |
834 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
835 | ide_drive_t *drive = &hwif->drives[unit]; | |
836 | ||
807b90d0 | 837 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
208a08f7 KG |
838 | drive->no_io_32bit = 1; |
839 | else | |
840 | drive->no_io_32bit = drive->id->dword_io ? 1 : 0; | |
841 | } | |
1da177e4 LT |
842 | } |
843 | ||
1da177e4 LT |
844 | #if MAX_HWIFS > 1 |
845 | /* | |
846 | * save_match() is used to simplify logic in init_irq() below. | |
847 | * | |
848 | * A loophole here is that we may not know about a particular | |
849 | * hwif's irq until after that hwif is actually probed/initialized.. | |
850 | * This could be a problem for the case where an hwif is on a | |
851 | * dual interface that requires serialization (eg. cmd640) and another | |
852 | * hwif using one of the same irqs is initialized beforehand. | |
853 | * | |
854 | * This routine detects and reports such situations, but does not fix them. | |
855 | */ | |
856 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
857 | { | |
858 | ide_hwif_t *m = *match; | |
859 | ||
860 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
861 | if (!new->hwgroup) | |
862 | return; | |
863 | printk("%s: potential irq problem with %s and %s\n", | |
864 | hwif->name, new->name, m->name); | |
865 | } | |
866 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
867 | *match = new; | |
868 | } | |
869 | #endif /* MAX_HWIFS > 1 */ | |
870 | ||
871 | /* | |
872 | * init request queue | |
873 | */ | |
874 | static int ide_init_queue(ide_drive_t *drive) | |
875 | { | |
165125e1 | 876 | struct request_queue *q; |
1da177e4 LT |
877 | ide_hwif_t *hwif = HWIF(drive); |
878 | int max_sectors = 256; | |
879 | int max_sg_entries = PRD_ENTRIES; | |
880 | ||
881 | /* | |
882 | * Our default set up assumes the normal IDE case, | |
883 | * that is 64K segmenting, standard PRD setup | |
884 | * and LBA28. Some drivers then impose their own | |
885 | * limits and LBA48 we could raise it but as yet | |
886 | * do not. | |
887 | */ | |
1946089a | 888 | |
556e58fe | 889 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
890 | if (!q) |
891 | return 1; | |
892 | ||
893 | q->queuedata = drive; | |
894 | blk_queue_segment_boundary(q, 0xffff); | |
895 | ||
1da177e4 LT |
896 | if (hwif->rqsize < max_sectors) |
897 | max_sectors = hwif->rqsize; | |
898 | blk_queue_max_sectors(q, max_sectors); | |
899 | ||
900 | #ifdef CONFIG_PCI | |
901 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
902 | * creates segments that don't completely match our boundary | |
903 | * requirements and thus need to be broken up again. Because it | |
904 | * doesn't align properly either, we may actually have to break up | |
905 | * to more segments than what was we got in the first place, a max | |
906 | * worst case is twice as many. | |
907 | * This will be fixed once we teach pci_map_sg() about our boundary | |
908 | * requirements, hopefully soon. *FIXME* | |
909 | */ | |
910 | if (!PCI_DMA_BUS_IS_PHYS) | |
911 | max_sg_entries >>= 1; | |
912 | #endif /* CONFIG_PCI */ | |
913 | ||
914 | blk_queue_max_hw_segments(q, max_sg_entries); | |
915 | blk_queue_max_phys_segments(q, max_sg_entries); | |
916 | ||
917 | /* assign drive queue */ | |
918 | drive->queue = q; | |
919 | ||
920 | /* needs drive->queue to be set */ | |
921 | ide_toggle_bounce(drive, 1); | |
922 | ||
1da177e4 LT |
923 | return 0; |
924 | } | |
925 | ||
0947e0dc BZ |
926 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
927 | { | |
928 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
929 | ||
930 | spin_lock_irq(&ide_lock); | |
931 | if (!hwgroup->drive) { | |
932 | /* first drive for hwgroup. */ | |
933 | drive->next = drive; | |
934 | hwgroup->drive = drive; | |
935 | hwgroup->hwif = HWIF(hwgroup->drive); | |
936 | } else { | |
937 | drive->next = hwgroup->drive->next; | |
938 | hwgroup->drive->next = drive; | |
939 | } | |
940 | spin_unlock_irq(&ide_lock); | |
941 | } | |
942 | ||
d5bc6592 BZ |
943 | /* |
944 | * For any present drive: | |
945 | * - allocate the block device queue | |
946 | * - link drive into the hwgroup | |
947 | */ | |
948 | static void ide_port_setup_devices(ide_hwif_t *hwif) | |
949 | { | |
950 | int i; | |
951 | ||
952 | for (i = 0; i < MAX_DRIVES; i++) { | |
953 | ide_drive_t *drive = &hwif->drives[i]; | |
954 | ||
955 | if (!drive->present) | |
956 | continue; | |
957 | ||
958 | if (ide_init_queue(drive)) { | |
959 | printk(KERN_ERR "ide: failed to init %s\n", | |
960 | drive->name); | |
961 | continue; | |
962 | } | |
963 | ||
964 | ide_add_drive_to_hwgroup(drive); | |
965 | } | |
966 | } | |
967 | ||
1da177e4 LT |
968 | /* |
969 | * This routine sets up the irq for an ide interface, and creates a new | |
970 | * hwgroup for the irq/hwif if none was previously assigned. | |
971 | * | |
972 | * Much of the code is for correctly detecting/handling irq sharing | |
973 | * and irq serialization situations. This is somewhat complex because | |
974 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
975 | */ |
976 | static int init_irq (ide_hwif_t *hwif) | |
977 | { | |
978 | unsigned int index; | |
979 | ide_hwgroup_t *hwgroup; | |
980 | ide_hwif_t *match = NULL; | |
981 | ||
982 | ||
983 | BUG_ON(in_interrupt()); | |
984 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
985 | BUG_ON(hwif == NULL); |
986 | ||
ef29888e | 987 | mutex_lock(&ide_cfg_mtx); |
1da177e4 LT |
988 | hwif->hwgroup = NULL; |
989 | #if MAX_HWIFS > 1 | |
990 | /* | |
991 | * Group up with any other hwifs that share our irq(s). | |
992 | */ | |
993 | for (index = 0; index < MAX_HWIFS; index++) { | |
994 | ide_hwif_t *h = &ide_hwifs[index]; | |
995 | if (h->hwgroup) { /* scan only initialized hwif's */ | |
996 | if (hwif->irq == h->irq) { | |
997 | hwif->sharing_irq = h->sharing_irq = 1; | |
998 | if (hwif->chipset != ide_pci || | |
999 | h->chipset != ide_pci) { | |
1000 | save_match(hwif, h, &match); | |
1001 | } | |
1002 | } | |
1003 | if (hwif->serialized) { | |
1004 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1005 | save_match(hwif, h, &match); | |
1006 | } | |
1007 | if (h->serialized) { | |
1008 | if (h->mate && hwif->irq == h->mate->irq) | |
1009 | save_match(hwif, h, &match); | |
1010 | } | |
1011 | } | |
1012 | } | |
1013 | #endif /* MAX_HWIFS > 1 */ | |
1014 | /* | |
1015 | * If we are still without a hwgroup, then form a new one | |
1016 | */ | |
1017 | if (match) { | |
1018 | hwgroup = match->hwgroup; | |
1019 | hwif->hwgroup = hwgroup; | |
1020 | /* | |
1021 | * Link us into the hwgroup. | |
1022 | * This must be done early, do ensure that unexpected_intr | |
1023 | * can find the hwif and prevent irq storms. | |
1024 | * No drives are attached to the new hwif, choose_drive | |
1025 | * can't do anything stupid (yet). | |
1026 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1027 | * linked list, the first entry is the hwif that owns | |
1028 | * hwgroup->handler - do not change that. | |
1029 | */ | |
1030 | spin_lock_irq(&ide_lock); | |
1031 | hwif->next = hwgroup->hwif->next; | |
1032 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1033 | BUG_ON(hwif->next == hwif); |
1da177e4 LT |
1034 | spin_unlock_irq(&ide_lock); |
1035 | } else { | |
422278ef BZ |
1036 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1037 | hwif_to_node(hwif)); | |
1038 | if (hwgroup == NULL) | |
1039 | goto out_up; | |
1da177e4 LT |
1040 | |
1041 | hwif->hwgroup = hwgroup; | |
422278ef | 1042 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1043 | |
1da177e4 LT |
1044 | init_timer(&hwgroup->timer); |
1045 | hwgroup->timer.function = &ide_timer_expiry; | |
1046 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1047 | } | |
1048 | ||
1049 | /* | |
1050 | * Allocate the irq, if not already obtained for another hwif | |
1051 | */ | |
1052 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1053 | int sa = 0; |
7b892806 | 1054 | #if defined(__mc68000__) |
362537b9 | 1055 | sa = IRQF_SHARED; |
e1771e20 | 1056 | #endif /* __mc68000__ */ |
1da177e4 | 1057 | |
7b5da4be | 1058 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) |
362537b9 | 1059 | sa = IRQF_SHARED; |
1da177e4 LT |
1060 | |
1061 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
1062 | /* clear nIEN */ | |
1063 | hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
1064 | ||
1065 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1066 | goto out_unlink; | |
1067 | } | |
1068 | ||
8a0e7e14 BZ |
1069 | if (!hwif->rqsize) { |
1070 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1071 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1072 | hwif->rqsize = 256; | |
1073 | else | |
1074 | hwif->rqsize = 65536; | |
1075 | } | |
1076 | ||
7b892806 | 1077 | #if !defined(__mc68000__) |
1da177e4 LT |
1078 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
1079 | hwif->io_ports[IDE_DATA_OFFSET], | |
1080 | hwif->io_ports[IDE_DATA_OFFSET]+7, | |
1081 | hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); | |
1da177e4 LT |
1082 | #else |
1083 | printk("%s at 0x%08lx on irq %d", hwif->name, | |
1084 | hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); | |
7b892806 | 1085 | #endif /* __mc68000__ */ |
1da177e4 LT |
1086 | if (match) |
1087 | printk(" (%sed with %s)", | |
1088 | hwif->sharing_irq ? "shar" : "serializ", match->name); | |
1089 | printk("\n"); | |
d5bc6592 BZ |
1090 | |
1091 | ide_port_setup_devices(hwif); | |
1092 | ||
ef29888e | 1093 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1094 | return 0; |
1095 | out_unlink: | |
fbd13088 | 1096 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1097 | out_up: |
ef29888e | 1098 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1099 | return 1; |
1100 | } | |
1101 | ||
1102 | static int ata_lock(dev_t dev, void *data) | |
1103 | { | |
1104 | /* FIXME: we want to pin hwif down */ | |
1105 | return 0; | |
1106 | } | |
1107 | ||
1108 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1109 | { | |
1110 | ide_hwif_t *hwif = data; | |
1111 | int unit = *part >> PARTN_BITS; | |
1112 | ide_drive_t *drive = &hwif->drives[unit]; | |
1113 | if (!drive->present) | |
1114 | return NULL; | |
1115 | ||
1116 | if (drive->media == ide_disk) | |
1117 | request_module("ide-disk"); | |
1118 | if (drive->scsi) | |
1119 | request_module("ide-scsi"); | |
1120 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1121 | request_module("ide-cd"); | |
1122 | if (drive->media == ide_tape) | |
1123 | request_module("ide-tape"); | |
1124 | if (drive->media == ide_floppy) | |
1125 | request_module("ide-floppy"); | |
1126 | ||
1127 | return NULL; | |
1128 | } | |
1129 | ||
1130 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1131 | { | |
1132 | struct gendisk *p = data; | |
1133 | *part &= (1 << PARTN_BITS) - 1; | |
edfaa7c3 | 1134 | return &p->dev.kobj; |
1da177e4 LT |
1135 | } |
1136 | ||
1137 | static int exact_lock(dev_t dev, void *data) | |
1138 | { | |
1139 | struct gendisk *p = data; | |
1140 | ||
1141 | if (!get_disk(p)) | |
1142 | return -1; | |
1143 | return 0; | |
1144 | } | |
1145 | ||
1146 | void ide_register_region(struct gendisk *disk) | |
1147 | { | |
1148 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1149 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1150 | } | |
1151 | ||
1152 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1153 | ||
1154 | void ide_unregister_region(struct gendisk *disk) | |
1155 | { | |
1156 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1157 | disk->minors); | |
1158 | } | |
1159 | ||
1160 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1161 | ||
1162 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1163 | { | |
1164 | ide_hwif_t *hwif = drive->hwif; | |
1165 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1166 | ||
1167 | disk->major = hwif->major; | |
1168 | disk->first_minor = unit << PARTN_BITS; | |
1169 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1170 | disk->queue = drive->queue; | |
1171 | } | |
1172 | ||
1173 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1174 | ||
8604affd BZ |
1175 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1176 | { | |
1177 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1178 | ||
1179 | if (drive == drive->next) { | |
1180 | /* special case: last drive from hwgroup. */ | |
1181 | BUG_ON(hwgroup->drive != drive); | |
1182 | hwgroup->drive = NULL; | |
1183 | } else { | |
1184 | ide_drive_t *walk; | |
1185 | ||
1186 | walk = hwgroup->drive; | |
1187 | while (walk->next != drive) | |
1188 | walk = walk->next; | |
1189 | walk->next = drive->next; | |
1190 | if (hwgroup->drive == drive) { | |
1191 | hwgroup->drive = drive->next; | |
1192 | hwgroup->hwif = hwgroup->drive->hwif; | |
1193 | } | |
1194 | } | |
1195 | BUG_ON(hwgroup->drive == drive); | |
1196 | } | |
1197 | ||
1da177e4 LT |
1198 | static void drive_release_dev (struct device *dev) |
1199 | { | |
1200 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1201 | ||
5b0c4b30 BZ |
1202 | ide_proc_unregister_device(drive); |
1203 | ||
8604affd | 1204 | spin_lock_irq(&ide_lock); |
8604affd | 1205 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1206 | kfree(drive->id); |
1207 | drive->id = NULL; | |
8604affd BZ |
1208 | drive->present = 0; |
1209 | /* Messed up locking ... */ | |
1210 | spin_unlock_irq(&ide_lock); | |
1211 | blk_cleanup_queue(drive->queue); | |
1212 | spin_lock_irq(&ide_lock); | |
1213 | drive->queue = NULL; | |
1214 | spin_unlock_irq(&ide_lock); | |
1215 | ||
f36d4024 | 1216 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1217 | } |
1218 | ||
1da177e4 LT |
1219 | static int hwif_init(ide_hwif_t *hwif) |
1220 | { | |
1221 | int old_irq; | |
1222 | ||
1da177e4 LT |
1223 | if (!hwif->irq) { |
1224 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) | |
1225 | { | |
1226 | printk("%s: DISABLED, NO IRQ\n", hwif->name); | |
48535651 | 1227 | return 0; |
1da177e4 LT |
1228 | } |
1229 | } | |
1230 | #ifdef CONFIG_BLK_DEV_HD | |
1231 | if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { | |
1232 | printk("%s: CANNOT SHARE IRQ WITH OLD " | |
1233 | "HARDDISK DRIVER (hd.c)\n", hwif->name); | |
48535651 | 1234 | return 0; |
1da177e4 LT |
1235 | } |
1236 | #endif /* CONFIG_BLK_DEV_HD */ | |
1237 | ||
1da177e4 LT |
1238 | if (register_blkdev(hwif->major, hwif->name)) |
1239 | return 0; | |
1240 | ||
1241 | if (!hwif->sg_max_nents) | |
1242 | hwif->sg_max_nents = PRD_ENTRIES; | |
1243 | ||
45711f1a | 1244 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1245 | GFP_KERNEL); |
1246 | if (!hwif->sg_table) { | |
1247 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1248 | goto out; | |
1249 | } | |
45711f1a JA |
1250 | |
1251 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1252 | |
1253 | if (init_irq(hwif) == 0) | |
1254 | goto done; | |
1255 | ||
1256 | old_irq = hwif->irq; | |
1257 | /* | |
1258 | * It failed to initialise. Find the default IRQ for | |
1259 | * this port and try that. | |
1260 | */ | |
1261 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { | |
1262 | printk("%s: Disabled unable to get IRQ %d.\n", | |
1263 | hwif->name, old_irq); | |
1264 | goto out; | |
1265 | } | |
1266 | if (init_irq(hwif)) { | |
1267 | printk("%s: probed IRQ %d and default IRQ %d failed.\n", | |
1268 | hwif->name, old_irq, hwif->irq); | |
1269 | goto out; | |
1270 | } | |
1271 | printk("%s: probed IRQ %d failed, using default.\n", | |
1272 | hwif->name, hwif->irq); | |
1273 | ||
1274 | done: | |
3a4e7c96 BZ |
1275 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1276 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1277 | return 1; |
1278 | ||
1279 | out: | |
1280 | unregister_blkdev(hwif->major, hwif->name); | |
1281 | return 0; | |
1282 | } | |
1283 | ||
9601a607 BZ |
1284 | static void hwif_register_devices(ide_hwif_t *hwif) |
1285 | { | |
1286 | unsigned int i; | |
1287 | ||
1288 | for (i = 0; i < MAX_DRIVES; i++) { | |
1289 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1290 | struct device *dev = &drive->gendev; |
1291 | int ret; | |
9601a607 | 1292 | |
c5d70cc7 BZ |
1293 | if (!drive->present) |
1294 | continue; | |
9601a607 | 1295 | |
c5d70cc7 BZ |
1296 | ide_add_generic_settings(drive); |
1297 | ||
1298 | snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); | |
1299 | dev->parent = &hwif->gendev; | |
1300 | dev->bus = &ide_bus_type; | |
1301 | dev->driver_data = drive; | |
1302 | dev->release = drive_release_dev; | |
1303 | ||
1304 | ret = device_register(dev); | |
1305 | if (ret < 0) | |
1306 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1307 | "%d\n", __func__, ret); | |
9601a607 BZ |
1308 | } |
1309 | } | |
1310 | ||
7704ca2a BZ |
1311 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1312 | { | |
1313 | int i; | |
1314 | ||
1315 | for (i = 0; i < MAX_DRIVES; i++) { | |
1316 | ide_drive_t *drive = &hwif->drives[i]; | |
1317 | ||
1318 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) | |
1319 | drive->io_32bit = 1; | |
1320 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
1321 | drive->unmask = 1; | |
807b90d0 BZ |
1322 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
1323 | drive->no_unmask = 1; | |
7704ca2a BZ |
1324 | if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0) |
1325 | drive->autotune = 1; | |
1326 | } | |
1f2cf8b0 BZ |
1327 | |
1328 | if (hwif->port_init_devs) | |
1329 | hwif->port_init_devs(hwif); | |
7704ca2a BZ |
1330 | } |
1331 | ||
c413b9b9 BZ |
1332 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1333 | const struct ide_port_info *d) | |
8447d9d5 | 1334 | { |
c413b9b9 BZ |
1335 | if (d->chipset != ide_etrax100) |
1336 | hwif->channel = port; | |
1337 | ||
1338 | if (d->chipset) | |
1339 | hwif->chipset = d->chipset; | |
1340 | ||
1341 | if (d->init_iops) | |
1342 | d->init_iops(hwif); | |
1343 | ||
1344 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) | |
1345 | ide_hwif_setup_dma(hwif, d); | |
1346 | ||
1347 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || | |
1348 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1349 | hwif->irq = port ? 15 : 14; | |
1350 | ||
1351 | hwif->host_flags = d->host_flags; | |
1352 | hwif->pio_mask = d->pio_mask; | |
1353 | ||
1354 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate) | |
1355 | hwif->mate->serialized = hwif->serialized = 1; | |
1356 | ||
c413b9b9 BZ |
1357 | hwif->swdma_mask = d->swdma_mask; |
1358 | hwif->mwdma_mask = d->mwdma_mask; | |
1359 | hwif->ultra_mask = d->udma_mask; | |
1360 | ||
1361 | /* reset DMA masks only for SFF-style DMA controllers */ | |
42800942 | 1362 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0) |
c413b9b9 BZ |
1363 | hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0; |
1364 | ||
c413b9b9 BZ |
1365 | if (d->host_flags & IDE_HFLAG_RQSIZE_256) |
1366 | hwif->rqsize = 256; | |
1367 | ||
1368 | /* call chipset specific routine for each enabled port */ | |
1369 | if (d->init_hwif) | |
1370 | d->init_hwif(hwif); | |
c7f6f21a | 1371 | } |
bfa14b42 | 1372 | |
c7f6f21a BZ |
1373 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1374 | { | |
bfa14b42 BZ |
1375 | if (hwif->cable_detect && (hwif->ultra_mask & 0x78)) { |
1376 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) | |
1377 | hwif->cbl = hwif->cable_detect(hwif); | |
1378 | } | |
c413b9b9 BZ |
1379 | } |
1380 | ||
1381 | int ide_device_add_all(u8 *idx, const struct ide_port_info *d) | |
1382 | { | |
1383 | ide_hwif_t *hwif, *mate = NULL; | |
8447d9d5 BZ |
1384 | int i, rc = 0; |
1385 | ||
c413b9b9 BZ |
1386 | for (i = 0; i < MAX_HWIFS; i++) { |
1387 | if (d == NULL || idx[i] == 0xff) { | |
1388 | mate = NULL; | |
1389 | continue; | |
1390 | } | |
1391 | ||
1392 | hwif = &ide_hwifs[idx[i]]; | |
1393 | ||
1394 | if (d->chipset != ide_etrax100 && (i & 1) && mate) { | |
1395 | hwif->mate = mate; | |
1396 | mate->mate = hwif; | |
1397 | } | |
1398 | ||
1399 | mate = (i & 1) ? NULL : hwif; | |
1400 | ||
1401 | ide_init_port(hwif, i & 1, d); | |
c7f6f21a | 1402 | ide_port_cable_detect(hwif); |
7704ca2a | 1403 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1404 | } |
1405 | ||
151575e4 | 1406 | for (i = 0; i < MAX_HWIFS; i++) { |
ba6560aa BZ |
1407 | if (idx[i] == 0xff) |
1408 | continue; | |
1409 | ||
139ddfca BZ |
1410 | hwif = &ide_hwifs[idx[i]]; |
1411 | ||
1412 | if ((hwif->chipset != ide_4drives || !hwif->mate || | |
1413 | !hwif->mate->present) && ide_hwif_request_regions(hwif)) { | |
1414 | printk(KERN_ERR "%s: ports already in use, " | |
1415 | "skipping probe\n", hwif->name); | |
1416 | continue; | |
1417 | } | |
1418 | ||
e84e7ea7 | 1419 | if (ide_probe_port(hwif) < 0) { |
139ddfca | 1420 | ide_hwif_release_regions(hwif); |
e84e7ea7 BZ |
1421 | continue; |
1422 | } | |
1423 | ||
a14dc574 BZ |
1424 | hwif->present = 1; |
1425 | ||
1426 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1427 | !hwif->mate->present) | |
1428 | ide_register_port(hwif); | |
1429 | ||
e84e7ea7 | 1430 | ide_port_tune_devices(hwif); |
2e13093a | 1431 | } |
ba6560aa | 1432 | |
151575e4 | 1433 | for (i = 0; i < MAX_HWIFS; i++) { |
2e13093a BZ |
1434 | if (idx[i] == 0xff) |
1435 | continue; | |
1436 | ||
1437 | hwif = &ide_hwifs[idx[i]]; | |
ba6560aa | 1438 | |
48535651 BZ |
1439 | if (!hwif->present) |
1440 | continue; | |
1441 | ||
ba6560aa BZ |
1442 | if (hwif_init(hwif) == 0) { |
1443 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1444 | "interface\n", hwif->name); | |
48535651 | 1445 | hwif->present = 0; |
ba6560aa BZ |
1446 | rc = -1; |
1447 | continue; | |
1448 | } | |
decdc3f0 BZ |
1449 | |
1450 | ide_acpi_init(hwif); | |
eafd88a3 | 1451 | ide_acpi_port_init_devices(hwif); |
2e13093a BZ |
1452 | } |
1453 | ||
151575e4 | 1454 | for (i = 0; i < MAX_HWIFS; i++) { |
2e13093a BZ |
1455 | if (idx[i] == 0xff) |
1456 | continue; | |
1457 | ||
1458 | hwif = &ide_hwifs[idx[i]]; | |
ba6560aa | 1459 | |
71518342 BZ |
1460 | if (hwif->present) { |
1461 | if (hwif->chipset == ide_unknown || | |
1462 | hwif->chipset == ide_forced) | |
1463 | hwif->chipset = ide_generic; | |
ba6560aa | 1464 | hwif_register_devices(hwif); |
71518342 | 1465 | } |
8447d9d5 BZ |
1466 | } |
1467 | ||
151575e4 | 1468 | for (i = 0; i < MAX_HWIFS; i++) { |
327617e1 BZ |
1469 | if (idx[i] == 0xff) |
1470 | continue; | |
1471 | ||
1472 | hwif = &ide_hwifs[idx[i]]; | |
1473 | ||
d9270a3f | 1474 | if (hwif->present) { |
327617e1 | 1475 | ide_proc_register_port(hwif); |
d9270a3f BZ |
1476 | ide_proc_port_register_devices(hwif); |
1477 | } | |
8447d9d5 BZ |
1478 | } |
1479 | ||
1480 | return rc; | |
1481 | } | |
151575e4 BZ |
1482 | EXPORT_SYMBOL_GPL(ide_device_add_all); |
1483 | ||
c413b9b9 | 1484 | int ide_device_add(u8 idx[4], const struct ide_port_info *d) |
151575e4 BZ |
1485 | { |
1486 | u8 idx_all[MAX_HWIFS]; | |
1487 | int i; | |
8447d9d5 | 1488 | |
151575e4 BZ |
1489 | for (i = 0; i < MAX_HWIFS; i++) |
1490 | idx_all[i] = (i < 4) ? idx[i] : 0xff; | |
1491 | ||
c413b9b9 | 1492 | return ide_device_add_all(idx_all, d); |
151575e4 | 1493 | } |
8447d9d5 | 1494 | EXPORT_SYMBOL_GPL(ide_device_add); |