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1da177e4 LT |
1 | /* |
2 | * linux/drivers/ide/ide-probe.c Version 1.11 Mar 05, 2003 | |
3 | * | |
4 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) | |
5 | */ | |
6 | ||
7 | /* | |
8 | * Mostly written by Mark Lord <mlord@pobox.com> | |
9 | * and Gadi Oxman <gadio@netvision.net.il> | |
10 | * and Andre Hedrick <andre@linux-ide.org> | |
11 | * | |
12 | * See linux/MAINTAINERS for address of current maintainer. | |
13 | * | |
14 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
15 | * | |
16 | * Version 1.00 move drive probing code from ide.c to ide-probe.c | |
17 | * Version 1.01 fix compilation problem for m68k | |
18 | * Version 1.02 increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot | |
19 | * by Andrea Arcangeli | |
20 | * Version 1.03 fix for (hwif->chipset == ide_4drives) | |
21 | * Version 1.04 fixed buggy treatments of known flash memory cards | |
22 | * | |
23 | * Version 1.05 fix for (hwif->chipset == ide_pdc4030) | |
24 | * added ide6/7/8/9 | |
25 | * allowed for secondary flash card to be detectable | |
26 | * with new flag : drive->ata_flash : 1; | |
27 | * Version 1.06 stream line request queue and prep for cascade project. | |
28 | * Version 1.07 max_sect <= 255; slower disks would get behind and | |
29 | * then fall over when they get to 256. Paul G. | |
30 | * Version 1.10 Update set for new IDE. drive->id is now always | |
31 | * valid after probe time even with noprobe | |
32 | */ | |
33 | ||
1da177e4 LT |
34 | #include <linux/module.h> |
35 | #include <linux/types.h> | |
36 | #include <linux/string.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/timer.h> | |
39 | #include <linux/mm.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/major.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/genhd.h> | |
44 | #include <linux/slab.h> | |
45 | #include <linux/delay.h> | |
46 | #include <linux/ide.h> | |
47 | #include <linux/spinlock.h> | |
48 | #include <linux/kmod.h> | |
49 | #include <linux/pci.h> | |
dc81785d | 50 | #include <linux/scatterlist.h> |
1da177e4 LT |
51 | |
52 | #include <asm/byteorder.h> | |
53 | #include <asm/irq.h> | |
54 | #include <asm/uaccess.h> | |
55 | #include <asm/io.h> | |
56 | ||
57 | /** | |
58 | * generic_id - add a generic drive id | |
59 | * @drive: drive to make an ID block for | |
60 | * | |
61 | * Add a fake id field to the drive we are passed. This allows | |
62 | * use to skip a ton of NULL checks (which people always miss) | |
63 | * and make drive properties unconditional outside of this file | |
64 | */ | |
65 | ||
66 | static void generic_id(ide_drive_t *drive) | |
67 | { | |
68 | drive->id->cyls = drive->cyl; | |
69 | drive->id->heads = drive->head; | |
70 | drive->id->sectors = drive->sect; | |
71 | drive->id->cur_cyls = drive->cyl; | |
72 | drive->id->cur_heads = drive->head; | |
73 | drive->id->cur_sectors = drive->sect; | |
74 | } | |
75 | ||
76 | static void ide_disk_init_chs(ide_drive_t *drive) | |
77 | { | |
78 | struct hd_driveid *id = drive->id; | |
79 | ||
80 | /* Extract geometry if we did not already have one for the drive */ | |
81 | if (!drive->cyl || !drive->head || !drive->sect) { | |
82 | drive->cyl = drive->bios_cyl = id->cyls; | |
83 | drive->head = drive->bios_head = id->heads; | |
84 | drive->sect = drive->bios_sect = id->sectors; | |
85 | } | |
86 | ||
87 | /* Handle logical geometry translation by the drive */ | |
88 | if ((id->field_valid & 1) && id->cur_cyls && | |
89 | id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) { | |
90 | drive->cyl = id->cur_cyls; | |
91 | drive->head = id->cur_heads; | |
92 | drive->sect = id->cur_sectors; | |
93 | } | |
94 | ||
95 | /* Use physical geometry if what we have still makes no sense */ | |
96 | if (drive->head > 16 && id->heads && id->heads <= 16) { | |
97 | drive->cyl = id->cyls; | |
98 | drive->head = id->heads; | |
99 | drive->sect = id->sectors; | |
100 | } | |
101 | } | |
102 | ||
103 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
104 | { | |
105 | struct hd_driveid *id = drive->id; | |
106 | ||
107 | drive->mult_count = 0; | |
108 | if (id->max_multsect) { | |
109 | #ifdef CONFIG_IDEDISK_MULTI_MODE | |
110 | id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0; | |
111 | id->multsect_valid = id->multsect ? 1 : 0; | |
112 | drive->mult_req = id->multsect_valid ? id->max_multsect : INITIAL_MULT_COUNT; | |
113 | drive->special.b.set_multmode = drive->mult_req ? 1 : 0; | |
114 | #else /* original, pre IDE-NFG, per request of AC */ | |
115 | drive->mult_req = INITIAL_MULT_COUNT; | |
116 | if (drive->mult_req > id->max_multsect) | |
117 | drive->mult_req = id->max_multsect; | |
118 | if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect)) | |
119 | drive->special.b.set_multmode = 1; | |
120 | #endif | |
121 | } | |
122 | } | |
123 | ||
1da177e4 LT |
124 | /** |
125 | * do_identify - identify a drive | |
126 | * @drive: drive to identify | |
127 | * @cmd: command used | |
128 | * | |
129 | * Called when we have issued a drive identify command to | |
130 | * read and parse the results. This function is run with | |
131 | * interrupts disabled. | |
132 | */ | |
133 | ||
134 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
135 | { | |
136 | ide_hwif_t *hwif = HWIF(drive); | |
137 | int bswap = 1; | |
138 | struct hd_driveid *id; | |
139 | ||
140 | id = drive->id; | |
141 | /* read 512 bytes of id info */ | |
142 | hwif->ata_input_data(drive, id, SECTOR_WORDS); | |
143 | ||
144 | drive->id_read = 1; | |
145 | local_irq_enable(); | |
146 | ide_fix_driveid(id); | |
147 | ||
e71bc140 | 148 | #if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA) |
1da177e4 LT |
149 | /* |
150 | * EATA SCSI controllers do a hardware ATA emulation: | |
151 | * Ignore them if there is a driver for them available. | |
152 | */ | |
153 | if ((id->model[0] == 'P' && id->model[1] == 'M') || | |
154 | (id->model[0] == 'S' && id->model[1] == 'K')) { | |
155 | printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model); | |
156 | goto err_misc; | |
157 | } | |
e71bc140 | 158 | #endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */ |
1da177e4 LT |
159 | |
160 | /* | |
161 | * WIN_IDENTIFY returns little-endian info, | |
162 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
163 | */ | |
164 | if (cmd == WIN_PIDENTIFY) { | |
165 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ | |
166 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ | |
167 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ | |
168 | /* Vertos drives may still be weird */ | |
169 | bswap ^= 1; | |
170 | } | |
171 | ide_fixstring(id->model, sizeof(id->model), bswap); | |
172 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); | |
173 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); | |
174 | ||
175 | if (strstr(id->model, "E X A B Y T E N E S T")) | |
176 | goto err_misc; | |
177 | ||
178 | /* we depend on this a lot! */ | |
179 | id->model[sizeof(id->model)-1] = '\0'; | |
180 | printk("%s: %s, ", drive->name, id->model); | |
181 | drive->present = 1; | |
182 | drive->dead = 0; | |
183 | ||
184 | /* | |
185 | * Check for an ATAPI device | |
186 | */ | |
187 | if (cmd == WIN_PIDENTIFY) { | |
188 | u8 type = (id->config >> 8) & 0x1f; | |
189 | printk("ATAPI "); | |
190 | switch (type) { | |
191 | case ide_floppy: | |
192 | if (!strstr(id->model, "CD-ROM")) { | |
193 | if (!strstr(id->model, "oppy") && | |
194 | !strstr(id->model, "poyp") && | |
195 | !strstr(id->model, "ZIP")) | |
196 | printk("cdrom or floppy?, assuming "); | |
197 | if (drive->media != ide_cdrom) { | |
198 | printk ("FLOPPY"); | |
199 | drive->removable = 1; | |
200 | break; | |
201 | } | |
202 | } | |
203 | /* Early cdrom models used zero */ | |
204 | type = ide_cdrom; | |
205 | case ide_cdrom: | |
206 | drive->removable = 1; | |
207 | #ifdef CONFIG_PPC | |
208 | /* kludge for Apple PowerBook internal zip */ | |
209 | if (!strstr(id->model, "CD-ROM") && | |
210 | strstr(id->model, "ZIP")) { | |
211 | printk ("FLOPPY"); | |
212 | type = ide_floppy; | |
213 | break; | |
214 | } | |
215 | #endif | |
216 | printk ("CD/DVD-ROM"); | |
217 | break; | |
218 | case ide_tape: | |
219 | printk ("TAPE"); | |
220 | break; | |
221 | case ide_optical: | |
222 | printk ("OPTICAL"); | |
223 | drive->removable = 1; | |
224 | break; | |
225 | default: | |
226 | printk("UNKNOWN (type %d)", type); | |
227 | break; | |
228 | } | |
229 | printk (" drive\n"); | |
230 | drive->media = type; | |
231 | /* an ATAPI device ignores DRDY */ | |
232 | drive->ready_stat = 0; | |
233 | return; | |
234 | } | |
235 | ||
236 | /* | |
237 | * Not an ATAPI device: looks like a "regular" hard disk | |
238 | */ | |
98109337 RP |
239 | |
240 | /* | |
241 | * 0x848a = CompactFlash device | |
242 | * These are *not* removable in Linux definition of the term | |
243 | */ | |
244 | ||
245 | if ((id->config != 0x848a) && (id->config & (1<<7))) | |
1da177e4 LT |
246 | drive->removable = 1; |
247 | ||
1da177e4 | 248 | drive->media = ide_disk; |
98109337 | 249 | printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" ); |
1da177e4 LT |
250 | QUIRK_LIST(drive); |
251 | return; | |
252 | ||
253 | err_misc: | |
254 | kfree(id); | |
255 | drive->present = 0; | |
256 | return; | |
257 | } | |
258 | ||
259 | /** | |
260 | * actual_try_to_identify - send ata/atapi identify | |
261 | * @drive: drive to identify | |
262 | * @cmd: command to use | |
263 | * | |
264 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
265 | * and waits for a response. It also monitors irqs while this is | |
266 | * happening, in hope of automatically determining which one is | |
267 | * being used by the interface. | |
268 | * | |
269 | * Returns: 0 device was identified | |
270 | * 1 device timed-out (no response to identify request) | |
271 | * 2 device aborted the command (refused to identify itself) | |
272 | */ | |
273 | ||
274 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
275 | { | |
276 | ide_hwif_t *hwif = HWIF(drive); | |
277 | int rc; | |
278 | unsigned long hd_status; | |
279 | unsigned long timeout; | |
280 | u8 s = 0, a = 0; | |
281 | ||
282 | /* take a deep breath */ | |
283 | msleep(50); | |
284 | ||
285 | if (IDE_CONTROL_REG) { | |
286 | a = hwif->INB(IDE_ALTSTATUS_REG); | |
287 | s = hwif->INB(IDE_STATUS_REG); | |
288 | if ((a ^ s) & ~INDEX_STAT) { | |
289 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) instead of " | |
290 | "ALTSTATUS(0x%02x)\n", drive->name, s, a); | |
291 | /* ancient Seagate drives, broken interfaces */ | |
292 | hd_status = IDE_STATUS_REG; | |
293 | } else { | |
294 | /* use non-intrusive polling */ | |
295 | hd_status = IDE_ALTSTATUS_REG; | |
296 | } | |
297 | } else | |
298 | hd_status = IDE_STATUS_REG; | |
299 | ||
300 | /* set features register for atapi | |
301 | * identify command to be sure of reply | |
302 | */ | |
303 | if ((cmd == WIN_PIDENTIFY)) | |
304 | /* disable dma & overlap */ | |
305 | hwif->OUTB(0, IDE_FEATURE_REG); | |
306 | ||
307 | /* ask drive for ID */ | |
308 | hwif->OUTB(cmd, IDE_COMMAND_REG); | |
309 | ||
310 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
311 | timeout += jiffies; | |
312 | do { | |
313 | if (time_after(jiffies, timeout)) { | |
314 | /* drive timed-out */ | |
315 | return 1; | |
316 | } | |
317 | /* give drive a breather */ | |
318 | msleep(50); | |
319 | } while ((hwif->INB(hd_status)) & BUSY_STAT); | |
320 | ||
321 | /* wait for IRQ and DRQ_STAT */ | |
322 | msleep(50); | |
323 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), DRQ_STAT, BAD_R_STAT)) { | |
324 | unsigned long flags; | |
325 | ||
326 | /* local CPU only; some systems need this */ | |
327 | local_irq_save(flags); | |
328 | /* drive returned ID */ | |
329 | do_identify(drive, cmd); | |
330 | /* drive responded with ID */ | |
331 | rc = 0; | |
332 | /* clear drive IRQ */ | |
333 | (void) hwif->INB(IDE_STATUS_REG); | |
334 | local_irq_restore(flags); | |
335 | } else { | |
336 | /* drive refused ID */ | |
337 | rc = 2; | |
338 | } | |
339 | return rc; | |
340 | } | |
341 | ||
342 | /** | |
343 | * try_to_identify - try to identify a drive | |
344 | * @drive: drive to probe | |
345 | * @cmd: command to use | |
346 | * | |
347 | * Issue the identify command and then do IRQ probing to | |
348 | * complete the identification when needed by finding the | |
349 | * IRQ the drive is attached to | |
350 | */ | |
351 | ||
352 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
353 | { | |
354 | ide_hwif_t *hwif = HWIF(drive); | |
355 | int retval; | |
356 | int autoprobe = 0; | |
357 | unsigned long cookie = 0; | |
358 | ||
359 | /* | |
360 | * Disable device irq unless we need to | |
361 | * probe for it. Otherwise we'll get spurious | |
362 | * interrupts during the identify-phase that | |
363 | * the irq handler isn't expecting. | |
364 | */ | |
365 | if (IDE_CONTROL_REG) { | |
366 | u8 ctl = drive->ctl | 2; | |
367 | if (!hwif->irq) { | |
368 | autoprobe = 1; | |
369 | cookie = probe_irq_on(); | |
370 | /* enable device irq */ | |
371 | ctl &= ~2; | |
372 | } | |
373 | hwif->OUTB(ctl, IDE_CONTROL_REG); | |
374 | } | |
375 | ||
376 | retval = actual_try_to_identify(drive, cmd); | |
377 | ||
378 | if (autoprobe) { | |
379 | int irq; | |
380 | /* mask device irq */ | |
381 | hwif->OUTB(drive->ctl|2, IDE_CONTROL_REG); | |
382 | /* clear drive IRQ */ | |
383 | (void) hwif->INB(IDE_STATUS_REG); | |
384 | udelay(5); | |
385 | irq = probe_irq_off(cookie); | |
386 | if (!hwif->irq) { | |
387 | if (irq > 0) { | |
388 | hwif->irq = irq; | |
389 | } else { | |
390 | /* Mmmm.. multiple IRQs.. | |
391 | * don't know which was ours | |
392 | */ | |
393 | printk("%s: IRQ probe failed (0x%lx)\n", | |
394 | drive->name, cookie); | |
395 | } | |
396 | } | |
397 | } | |
398 | return retval; | |
399 | } | |
400 | ||
401 | ||
402 | /** | |
403 | * do_probe - probe an IDE device | |
404 | * @drive: drive to probe | |
405 | * @cmd: command to use | |
406 | * | |
407 | * do_probe() has the difficult job of finding a drive if it exists, | |
408 | * without getting hung up if it doesn't exist, without trampling on | |
409 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
410 | * | |
411 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
412 | * but does not respond right away, the probe will "hang in there" | |
413 | * for the maximum wait time (about 30 seconds), otherwise it will | |
414 | * exit much more quickly. | |
415 | * | |
416 | * Returns: 0 device was identified | |
417 | * 1 device timed-out (no response to identify request) | |
418 | * 2 device aborted the command (refused to identify itself) | |
419 | * 3 bad status from device (possible for ATAPI drives) | |
420 | * 4 probe was not attempted because failure was obvious | |
421 | */ | |
422 | ||
423 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
424 | { | |
425 | int rc; | |
426 | ide_hwif_t *hwif = HWIF(drive); | |
427 | ||
428 | if (drive->present) { | |
429 | /* avoid waiting for inappropriate probes */ | |
430 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
431 | return 4; | |
432 | } | |
433 | #ifdef DEBUG | |
434 | printk("probing for %s: present=%d, media=%d, probetype=%s\n", | |
435 | drive->name, drive->present, drive->media, | |
436 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
437 | #endif | |
438 | ||
439 | /* needed for some systems | |
440 | * (e.g. crw9624 as drive0 with disk as slave) | |
441 | */ | |
442 | msleep(50); | |
443 | SELECT_DRIVE(drive); | |
444 | msleep(50); | |
445 | if (hwif->INB(IDE_SELECT_REG) != drive->select.all && !drive->present) { | |
446 | if (drive->select.b.unit != 0) { | |
447 | /* exit with drive0 selected */ | |
448 | SELECT_DRIVE(&hwif->drives[0]); | |
449 | /* allow BUSY_STAT to assert & clear */ | |
450 | msleep(50); | |
451 | } | |
452 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
453 | return 3; | |
454 | } | |
455 | ||
456 | if (OK_STAT((hwif->INB(IDE_STATUS_REG)), READY_STAT, BUSY_STAT) || | |
457 | drive->present || cmd == WIN_PIDENTIFY) { | |
458 | /* send cmd and wait */ | |
459 | if ((rc = try_to_identify(drive, cmd))) { | |
460 | /* failed: try again */ | |
461 | rc = try_to_identify(drive,cmd); | |
462 | } | |
463 | if (hwif->INB(IDE_STATUS_REG) == (BUSY_STAT|READY_STAT)) | |
464 | return 4; | |
465 | ||
466 | if ((rc == 1 && cmd == WIN_PIDENTIFY) && | |
467 | ((drive->autotune == IDE_TUNE_DEFAULT) || | |
468 | (drive->autotune == IDE_TUNE_AUTO))) { | |
469 | unsigned long timeout; | |
470 | printk("%s: no response (status = 0x%02x), " | |
471 | "resetting drive\n", drive->name, | |
472 | hwif->INB(IDE_STATUS_REG)); | |
473 | msleep(50); | |
474 | hwif->OUTB(drive->select.all, IDE_SELECT_REG); | |
475 | msleep(50); | |
476 | hwif->OUTB(WIN_SRST, IDE_COMMAND_REG); | |
477 | timeout = jiffies; | |
478 | while (((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT) && | |
479 | time_before(jiffies, timeout + WAIT_WORSTCASE)) | |
480 | msleep(50); | |
481 | rc = try_to_identify(drive, cmd); | |
482 | } | |
483 | if (rc == 1) | |
484 | printk("%s: no response (status = 0x%02x)\n", | |
485 | drive->name, hwif->INB(IDE_STATUS_REG)); | |
486 | /* ensure drive irq is clear */ | |
487 | (void) hwif->INB(IDE_STATUS_REG); | |
488 | } else { | |
489 | /* not present or maybe ATAPI */ | |
490 | rc = 3; | |
491 | } | |
492 | if (drive->select.b.unit != 0) { | |
493 | /* exit with drive0 selected */ | |
494 | SELECT_DRIVE(&hwif->drives[0]); | |
495 | msleep(50); | |
496 | /* ensure drive irq is clear */ | |
497 | (void) hwif->INB(IDE_STATUS_REG); | |
498 | } | |
499 | return rc; | |
500 | } | |
501 | ||
502 | /* | |
503 | * | |
504 | */ | |
505 | static void enable_nest (ide_drive_t *drive) | |
506 | { | |
507 | ide_hwif_t *hwif = HWIF(drive); | |
508 | unsigned long timeout; | |
509 | ||
510 | printk("%s: enabling %s -- ", hwif->name, drive->id->model); | |
511 | SELECT_DRIVE(drive); | |
512 | msleep(50); | |
513 | hwif->OUTB(EXABYTE_ENABLE_NEST, IDE_COMMAND_REG); | |
514 | timeout = jiffies + WAIT_WORSTCASE; | |
515 | do { | |
516 | if (time_after(jiffies, timeout)) { | |
517 | printk("failed (timeout)\n"); | |
518 | return; | |
519 | } | |
520 | msleep(50); | |
521 | } while ((hwif->INB(IDE_STATUS_REG)) & BUSY_STAT); | |
522 | ||
523 | msleep(50); | |
524 | ||
525 | if (!OK_STAT((hwif->INB(IDE_STATUS_REG)), 0, BAD_STAT)) { | |
526 | printk("failed (status = 0x%02x)\n", hwif->INB(IDE_STATUS_REG)); | |
527 | } else { | |
528 | printk("success\n"); | |
529 | } | |
530 | ||
531 | /* if !(success||timed-out) */ | |
532 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
533 | /* look for ATAPI device */ | |
534 | (void) do_probe(drive, WIN_PIDENTIFY); | |
535 | } | |
536 | } | |
537 | ||
538 | /** | |
539 | * probe_for_drives - upper level drive probe | |
540 | * @drive: drive to probe for | |
541 | * | |
542 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
543 | * and presents things to the user as needed. | |
544 | * | |
545 | * Returns: 0 no device was found | |
546 | * 1 device was found (note: drive->present might | |
547 | * still be 0) | |
548 | */ | |
549 | ||
550 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
551 | { | |
552 | /* | |
553 | * In order to keep things simple we have an id | |
554 | * block for all drives at all times. If the device | |
555 | * is pre ATA or refuses ATA/ATAPI identify we | |
556 | * will add faked data to this. | |
557 | * | |
558 | * Also note that 0 everywhere means "can't do X" | |
559 | */ | |
560 | ||
f5e3c2fa | 561 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
562 | drive->id_read = 0; |
563 | if(drive->id == NULL) | |
564 | { | |
565 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
566 | return 0; | |
567 | } | |
1da177e4 LT |
568 | strcpy(drive->id->model, "UNKNOWN"); |
569 | ||
570 | /* skip probing? */ | |
571 | if (!drive->noprobe) | |
572 | { | |
573 | /* if !(success||timed-out) */ | |
574 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
575 | /* look for ATAPI device */ | |
576 | (void) do_probe(drive, WIN_PIDENTIFY); | |
577 | } | |
1da177e4 LT |
578 | if (!drive->present) |
579 | /* drive not found */ | |
580 | return 0; | |
78595575 AC |
581 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) |
582 | enable_nest(drive); | |
1da177e4 LT |
583 | |
584 | /* identification failed? */ | |
585 | if (!drive->id_read) { | |
586 | if (drive->media == ide_disk) { | |
587 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
588 | drive->name, drive->cyl, | |
589 | drive->head, drive->sect); | |
590 | } else if (drive->media == ide_cdrom) { | |
591 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
592 | } else { | |
593 | /* nuke it */ | |
594 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
595 | drive->present = 0; | |
596 | } | |
597 | } | |
598 | /* drive was found */ | |
599 | } | |
600 | if(!drive->present) | |
601 | return 0; | |
602 | /* The drive wasn't being helpful. Add generic info only */ | |
603 | if (drive->id_read == 0) { | |
604 | generic_id(drive); | |
605 | return 1; | |
606 | } | |
607 | ||
608 | if (drive->media == ide_disk) { | |
609 | ide_disk_init_chs(drive); | |
610 | ide_disk_init_mult_count(drive); | |
611 | } | |
612 | ||
613 | return drive->present; | |
614 | } | |
615 | ||
616 | static void hwif_release_dev (struct device *dev) | |
617 | { | |
618 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
619 | ||
f36d4024 | 620 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
621 | } |
622 | ||
623 | static void hwif_register (ide_hwif_t *hwif) | |
624 | { | |
349ae23f RD |
625 | int ret; |
626 | ||
1da177e4 LT |
627 | /* register with global device tree */ |
628 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
629 | hwif->gendev.driver_data = hwif; | |
630 | if (hwif->gendev.parent == NULL) { | |
631 | if (hwif->pci_dev) | |
632 | hwif->gendev.parent = &hwif->pci_dev->dev; | |
633 | else | |
634 | /* Would like to do = &device_legacy */ | |
635 | hwif->gendev.parent = NULL; | |
636 | } | |
637 | hwif->gendev.release = hwif_release_dev; | |
349ae23f RD |
638 | ret = device_register(&hwif->gendev); |
639 | if (ret < 0) | |
640 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", | |
641 | __FUNCTION__, ret); | |
1da177e4 LT |
642 | } |
643 | ||
644 | static int wait_hwif_ready(ide_hwif_t *hwif) | |
645 | { | |
646 | int rc; | |
647 | ||
648 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
649 | ||
650 | /* Let HW settle down a bit from whatever init state we | |
651 | * come from */ | |
652 | mdelay(2); | |
653 | ||
654 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
655 | * I know of at least one disk who takes 31 seconds, I use 35 | |
656 | * here to be safe | |
657 | */ | |
658 | rc = ide_wait_not_busy(hwif, 35000); | |
659 | if (rc) | |
660 | return rc; | |
661 | ||
662 | /* Now make sure both master & slave are ready */ | |
663 | SELECT_DRIVE(&hwif->drives[0]); | |
664 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
665 | mdelay(2); | |
284e4238 | 666 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
667 | if (rc) |
668 | return rc; | |
669 | SELECT_DRIVE(&hwif->drives[1]); | |
670 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
671 | mdelay(2); | |
284e4238 | 672 | rc = ide_wait_not_busy(hwif, 35000); |
1da177e4 LT |
673 | |
674 | /* Exit function with master reselected (let's be sane) */ | |
675 | SELECT_DRIVE(&hwif->drives[0]); | |
676 | ||
677 | return rc; | |
678 | } | |
679 | ||
680 | /** | |
681 | * ide_undecoded_slave - look for bad CF adapters | |
682 | * @hwif: interface | |
683 | * | |
684 | * Analyse the drives on the interface and attempt to decide if we | |
685 | * have the same drive viewed twice. This occurs with crap CF adapters | |
686 | * and PCMCIA sometimes. | |
687 | */ | |
688 | ||
689 | void ide_undecoded_slave(ide_hwif_t *hwif) | |
690 | { | |
691 | ide_drive_t *drive0 = &hwif->drives[0]; | |
692 | ide_drive_t *drive1 = &hwif->drives[1]; | |
693 | ||
694 | if (drive0->present == 0 || drive1->present == 0) | |
695 | return; | |
696 | ||
697 | /* If the models don't match they are not the same product */ | |
698 | if (strcmp(drive0->id->model, drive1->id->model)) | |
699 | return; | |
700 | ||
701 | /* Serial numbers do not match */ | |
702 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) | |
703 | return; | |
704 | ||
705 | /* No serial number, thankfully very rare for CF */ | |
706 | if (drive0->id->serial_no[0] == 0) | |
707 | return; | |
708 | ||
709 | /* Appears to be an IDE flash adapter with decode bugs */ | |
710 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
711 | ||
712 | drive1->present = 0; | |
713 | } | |
714 | ||
715 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
716 | ||
717 | /* | |
718 | * This routine only knows how to look for drive units 0 and 1 | |
719 | * on an interface, so any setting of MAX_DRIVES > 2 won't work here. | |
720 | */ | |
fd9bb539 | 721 | static void probe_hwif(ide_hwif_t *hwif) |
1da177e4 | 722 | { |
1da177e4 LT |
723 | unsigned long flags; |
724 | unsigned int irqd; | |
b140b99c | 725 | int unit; |
1da177e4 LT |
726 | |
727 | if (hwif->noprobe) | |
728 | return; | |
729 | ||
730 | if ((hwif->chipset != ide_4drives || !hwif->mate || !hwif->mate->present) && | |
731 | (ide_hwif_request_regions(hwif))) { | |
732 | u16 msgout = 0; | |
733 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
734 | ide_drive_t *drive = &hwif->drives[unit]; | |
735 | if (drive->present) { | |
736 | drive->present = 0; | |
737 | printk(KERN_ERR "%s: ERROR, PORTS ALREADY IN USE\n", | |
738 | drive->name); | |
739 | msgout = 1; | |
740 | } | |
741 | } | |
742 | if (!msgout) | |
743 | printk(KERN_ERR "%s: ports already in use, skipping probe\n", | |
744 | hwif->name); | |
745 | return; | |
746 | } | |
747 | ||
748 | /* | |
749 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
750 | * we'll install our IRQ driver much later... | |
751 | */ | |
752 | irqd = hwif->irq; | |
753 | if (irqd) | |
754 | disable_irq(hwif->irq); | |
755 | ||
756 | local_irq_set(flags); | |
757 | ||
758 | /* This is needed on some PPCs and a bunch of BIOS-less embedded | |
759 | * platforms. Typical cases are: | |
760 | * | |
761 | * - The firmware hard reset the disk before booting the kernel, | |
762 | * the drive is still doing it's poweron-reset sequence, that | |
763 | * can take up to 30 seconds | |
764 | * - The firmware does nothing (or no firmware), the device is | |
765 | * still in POST state (same as above actually). | |
766 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
767 | * their reset sequence even when they are non-selected slave | |
768 | * devices, thus preventing discovery of the main HD | |
769 | * | |
770 | * Doing this wait-for-busy should not harm any existing configuration | |
771 | * (at least things won't be worse than what current code does, that | |
772 | * is blindly go & talk to the drive) and fix some issues like the | |
773 | * above. | |
774 | * | |
775 | * BenH. | |
776 | */ | |
777 | if (wait_hwif_ready(hwif) == -EBUSY) | |
778 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); | |
779 | ||
780 | /* | |
b140b99c | 781 | * Need to probe slave device first to make it release PDIAG-. |
1da177e4 | 782 | */ |
b140b99c | 783 | for (unit = MAX_DRIVES - 1; unit >= 0; unit--) { |
1da177e4 LT |
784 | ide_drive_t *drive = &hwif->drives[unit]; |
785 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
786 | (void) probe_for_drive(drive); | |
787 | if (drive->present && !hwif->present) { | |
788 | hwif->present = 1; | |
789 | if (hwif->chipset != ide_4drives || | |
790 | !hwif->mate || | |
791 | !hwif->mate->present) { | |
792 | hwif_register(hwif); | |
793 | } | |
794 | } | |
795 | } | |
796 | if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) { | |
797 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
798 | u8 stat; | |
799 | ||
800 | printk(KERN_WARNING "%s: reset\n", hwif->name); | |
801 | hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
802 | udelay(10); | |
803 | hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
804 | do { | |
805 | msleep(50); | |
806 | stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]); | |
807 | } while ((stat & BUSY_STAT) && time_after(timeout, jiffies)); | |
808 | ||
809 | } | |
810 | local_irq_restore(flags); | |
811 | /* | |
812 | * Use cached IRQ number. It might be (and is...) changed by probe | |
813 | * code above | |
814 | */ | |
815 | if (irqd) | |
816 | enable_irq(irqd); | |
817 | ||
818 | if (!hwif->present) { | |
819 | ide_hwif_release_regions(hwif); | |
820 | return; | |
821 | } | |
822 | ||
fd9bb539 BZ |
823 | if (hwif->fixup) |
824 | hwif->fixup(hwif); | |
0380dad4 | 825 | |
1da177e4 LT |
826 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
827 | ide_drive_t *drive = &hwif->drives[unit]; | |
828 | ||
829 | if (drive->present) { | |
26bcb879 BZ |
830 | if (drive->autotune == IDE_TUNE_AUTO) |
831 | ide_set_max_pio(drive); | |
1da177e4 LT |
832 | |
833 | if (drive->autotune != IDE_TUNE_DEFAULT && | |
834 | drive->autotune != IDE_TUNE_AUTO) | |
835 | continue; | |
836 | ||
837 | drive->nice1 = 1; | |
838 | ||
0ae2e178 | 839 | if (hwif->ide_dma_on) { |
1da177e4 LT |
840 | /* |
841 | * Force DMAing for the beginning of the check. | |
842 | * Some chipsets appear to do interesting | |
843 | * things, if not checked and cleared. | |
844 | * PARANOIA!!! | |
845 | */ | |
7469aaf6 | 846 | hwif->dma_off_quietly(drive); |
8c0697cc | 847 | ide_set_dma(drive); |
1da177e4 LT |
848 | } |
849 | } | |
850 | } | |
208a08f7 KG |
851 | |
852 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
853 | ide_drive_t *drive = &hwif->drives[unit]; | |
854 | ||
855 | if (hwif->no_io_32bit) | |
856 | drive->no_io_32bit = 1; | |
857 | else | |
858 | drive->no_io_32bit = drive->id->dword_io ? 1 : 0; | |
859 | } | |
1da177e4 LT |
860 | } |
861 | ||
862 | static int hwif_init(ide_hwif_t *hwif); | |
9601a607 | 863 | static void hwif_register_devices(ide_hwif_t *hwif); |
1da177e4 | 864 | |
8447d9d5 | 865 | static int probe_hwif_init(ide_hwif_t *hwif) |
1da177e4 | 866 | { |
fd9bb539 | 867 | probe_hwif(hwif); |
1da177e4 LT |
868 | |
869 | if (!hwif_init(hwif)) { | |
870 | printk(KERN_INFO "%s: failed to initialize IDE interface\n", | |
871 | hwif->name); | |
872 | return -1; | |
873 | } | |
874 | ||
9601a607 BZ |
875 | if (hwif->present) |
876 | hwif_register_devices(hwif); | |
349ae23f | 877 | |
1da177e4 LT |
878 | return 0; |
879 | } | |
880 | ||
1da177e4 LT |
881 | #if MAX_HWIFS > 1 |
882 | /* | |
883 | * save_match() is used to simplify logic in init_irq() below. | |
884 | * | |
885 | * A loophole here is that we may not know about a particular | |
886 | * hwif's irq until after that hwif is actually probed/initialized.. | |
887 | * This could be a problem for the case where an hwif is on a | |
888 | * dual interface that requires serialization (eg. cmd640) and another | |
889 | * hwif using one of the same irqs is initialized beforehand. | |
890 | * | |
891 | * This routine detects and reports such situations, but does not fix them. | |
892 | */ | |
893 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
894 | { | |
895 | ide_hwif_t *m = *match; | |
896 | ||
897 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
898 | if (!new->hwgroup) | |
899 | return; | |
900 | printk("%s: potential irq problem with %s and %s\n", | |
901 | hwif->name, new->name, m->name); | |
902 | } | |
903 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
904 | *match = new; | |
905 | } | |
906 | #endif /* MAX_HWIFS > 1 */ | |
907 | ||
908 | /* | |
909 | * init request queue | |
910 | */ | |
911 | static int ide_init_queue(ide_drive_t *drive) | |
912 | { | |
165125e1 | 913 | struct request_queue *q; |
1da177e4 LT |
914 | ide_hwif_t *hwif = HWIF(drive); |
915 | int max_sectors = 256; | |
916 | int max_sg_entries = PRD_ENTRIES; | |
917 | ||
918 | /* | |
919 | * Our default set up assumes the normal IDE case, | |
920 | * that is 64K segmenting, standard PRD setup | |
921 | * and LBA28. Some drivers then impose their own | |
922 | * limits and LBA48 we could raise it but as yet | |
923 | * do not. | |
924 | */ | |
1946089a | 925 | |
556e58fe | 926 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
927 | if (!q) |
928 | return 1; | |
929 | ||
930 | q->queuedata = drive; | |
931 | blk_queue_segment_boundary(q, 0xffff); | |
932 | ||
933 | if (!hwif->rqsize) { | |
238e4f14 BZ |
934 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || |
935 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1da177e4 LT |
936 | hwif->rqsize = 256; |
937 | else | |
938 | hwif->rqsize = 65536; | |
939 | } | |
940 | if (hwif->rqsize < max_sectors) | |
941 | max_sectors = hwif->rqsize; | |
942 | blk_queue_max_sectors(q, max_sectors); | |
943 | ||
944 | #ifdef CONFIG_PCI | |
945 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
946 | * creates segments that don't completely match our boundary | |
947 | * requirements and thus need to be broken up again. Because it | |
948 | * doesn't align properly either, we may actually have to break up | |
949 | * to more segments than what was we got in the first place, a max | |
950 | * worst case is twice as many. | |
951 | * This will be fixed once we teach pci_map_sg() about our boundary | |
952 | * requirements, hopefully soon. *FIXME* | |
953 | */ | |
954 | if (!PCI_DMA_BUS_IS_PHYS) | |
955 | max_sg_entries >>= 1; | |
956 | #endif /* CONFIG_PCI */ | |
957 | ||
958 | blk_queue_max_hw_segments(q, max_sg_entries); | |
959 | blk_queue_max_phys_segments(q, max_sg_entries); | |
960 | ||
961 | /* assign drive queue */ | |
962 | drive->queue = q; | |
963 | ||
964 | /* needs drive->queue to be set */ | |
965 | ide_toggle_bounce(drive, 1); | |
966 | ||
1da177e4 LT |
967 | return 0; |
968 | } | |
969 | ||
970 | /* | |
971 | * This routine sets up the irq for an ide interface, and creates a new | |
972 | * hwgroup for the irq/hwif if none was previously assigned. | |
973 | * | |
974 | * Much of the code is for correctly detecting/handling irq sharing | |
975 | * and irq serialization situations. This is somewhat complex because | |
976 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
977 | * | |
362537b9 | 978 | * The IRQF_DISABLED in sa_flags means ide_intr() is always entered with |
1da177e4 LT |
979 | * interrupts completely disabled. This can be bad for interrupt latency, |
980 | * but anything else has led to problems on some machines. We re-enable | |
981 | * interrupts as much as we can safely do in most places. | |
982 | */ | |
983 | static int init_irq (ide_hwif_t *hwif) | |
984 | { | |
985 | unsigned int index; | |
986 | ide_hwgroup_t *hwgroup; | |
987 | ide_hwif_t *match = NULL; | |
988 | ||
989 | ||
990 | BUG_ON(in_interrupt()); | |
991 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
992 | BUG_ON(hwif == NULL); |
993 | ||
ef29888e | 994 | mutex_lock(&ide_cfg_mtx); |
1da177e4 LT |
995 | hwif->hwgroup = NULL; |
996 | #if MAX_HWIFS > 1 | |
997 | /* | |
998 | * Group up with any other hwifs that share our irq(s). | |
999 | */ | |
1000 | for (index = 0; index < MAX_HWIFS; index++) { | |
1001 | ide_hwif_t *h = &ide_hwifs[index]; | |
1002 | if (h->hwgroup) { /* scan only initialized hwif's */ | |
1003 | if (hwif->irq == h->irq) { | |
1004 | hwif->sharing_irq = h->sharing_irq = 1; | |
1005 | if (hwif->chipset != ide_pci || | |
1006 | h->chipset != ide_pci) { | |
1007 | save_match(hwif, h, &match); | |
1008 | } | |
1009 | } | |
1010 | if (hwif->serialized) { | |
1011 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1012 | save_match(hwif, h, &match); | |
1013 | } | |
1014 | if (h->serialized) { | |
1015 | if (h->mate && hwif->irq == h->mate->irq) | |
1016 | save_match(hwif, h, &match); | |
1017 | } | |
1018 | } | |
1019 | } | |
1020 | #endif /* MAX_HWIFS > 1 */ | |
1021 | /* | |
1022 | * If we are still without a hwgroup, then form a new one | |
1023 | */ | |
1024 | if (match) { | |
1025 | hwgroup = match->hwgroup; | |
1026 | hwif->hwgroup = hwgroup; | |
1027 | /* | |
1028 | * Link us into the hwgroup. | |
1029 | * This must be done early, do ensure that unexpected_intr | |
1030 | * can find the hwif and prevent irq storms. | |
1031 | * No drives are attached to the new hwif, choose_drive | |
1032 | * can't do anything stupid (yet). | |
1033 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1034 | * linked list, the first entry is the hwif that owns | |
1035 | * hwgroup->handler - do not change that. | |
1036 | */ | |
1037 | spin_lock_irq(&ide_lock); | |
1038 | hwif->next = hwgroup->hwif->next; | |
1039 | hwgroup->hwif->next = hwif; | |
1040 | spin_unlock_irq(&ide_lock); | |
1041 | } else { | |
94f6030c CL |
1042 | hwgroup = kmalloc_node(sizeof(ide_hwgroup_t), |
1043 | GFP_KERNEL | __GFP_ZERO, | |
556e58fe | 1044 | hwif_to_node(hwif->drives[0].hwif)); |
1da177e4 LT |
1045 | if (!hwgroup) |
1046 | goto out_up; | |
1047 | ||
1048 | hwif->hwgroup = hwgroup; | |
1049 | ||
1da177e4 LT |
1050 | hwgroup->hwif = hwif->next = hwif; |
1051 | hwgroup->rq = NULL; | |
1052 | hwgroup->handler = NULL; | |
1053 | hwgroup->drive = NULL; | |
1054 | hwgroup->busy = 0; | |
1055 | init_timer(&hwgroup->timer); | |
1056 | hwgroup->timer.function = &ide_timer_expiry; | |
1057 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1058 | } | |
1059 | ||
1060 | /* | |
1061 | * Allocate the irq, if not already obtained for another hwif | |
1062 | */ | |
1063 | if (!match || match->irq != hwif->irq) { | |
362537b9 | 1064 | int sa = IRQF_DISABLED; |
1da177e4 | 1065 | #if defined(__mc68000__) || defined(CONFIG_APUS) |
362537b9 | 1066 | sa = IRQF_SHARED; |
1da177e4 LT |
1067 | #endif /* __mc68000__ || CONFIG_APUS */ |
1068 | ||
1069 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) { | |
362537b9 | 1070 | sa = IRQF_SHARED; |
1da177e4 | 1071 | #ifndef CONFIG_IDEPCI_SHARE_IRQ |
362537b9 | 1072 | sa |= IRQF_DISABLED; |
1da177e4 LT |
1073 | #endif /* CONFIG_IDEPCI_SHARE_IRQ */ |
1074 | } | |
1075 | ||
1076 | if (hwif->io_ports[IDE_CONTROL_OFFSET]) | |
1077 | /* clear nIEN */ | |
1078 | hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]); | |
1079 | ||
1080 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1081 | goto out_unlink; | |
1082 | } | |
1083 | ||
1084 | /* | |
1085 | * For any present drive: | |
1086 | * - allocate the block device queue | |
1087 | * - link drive into the hwgroup | |
1088 | */ | |
1089 | for (index = 0; index < MAX_DRIVES; ++index) { | |
1090 | ide_drive_t *drive = &hwif->drives[index]; | |
1091 | if (!drive->present) | |
1092 | continue; | |
1093 | if (ide_init_queue(drive)) { | |
1094 | printk(KERN_ERR "ide: failed to init %s\n",drive->name); | |
1095 | continue; | |
1096 | } | |
1097 | spin_lock_irq(&ide_lock); | |
1098 | if (!hwgroup->drive) { | |
1099 | /* first drive for hwgroup. */ | |
1100 | drive->next = drive; | |
1101 | hwgroup->drive = drive; | |
1102 | hwgroup->hwif = HWIF(hwgroup->drive); | |
1103 | } else { | |
1104 | drive->next = hwgroup->drive->next; | |
1105 | hwgroup->drive->next = drive; | |
1106 | } | |
1107 | spin_unlock_irq(&ide_lock); | |
1108 | } | |
1109 | ||
c6387a48 | 1110 | #if !defined(__mc68000__) && !defined(CONFIG_APUS) |
1da177e4 LT |
1111 | printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
1112 | hwif->io_ports[IDE_DATA_OFFSET], | |
1113 | hwif->io_ports[IDE_DATA_OFFSET]+7, | |
1114 | hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq); | |
1da177e4 LT |
1115 | #else |
1116 | printk("%s at 0x%08lx on irq %d", hwif->name, | |
1117 | hwif->io_ports[IDE_DATA_OFFSET], hwif->irq); | |
1118 | #endif /* __mc68000__ && CONFIG_APUS */ | |
1119 | if (match) | |
1120 | printk(" (%sed with %s)", | |
1121 | hwif->sharing_irq ? "shar" : "serializ", match->name); | |
1122 | printk("\n"); | |
ef29888e | 1123 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1124 | return 0; |
1125 | out_unlink: | |
1126 | spin_lock_irq(&ide_lock); | |
1127 | if (hwif->next == hwif) { | |
1128 | BUG_ON(match); | |
1129 | BUG_ON(hwgroup->hwif != hwif); | |
1130 | kfree(hwgroup); | |
1131 | } else { | |
1132 | ide_hwif_t *g; | |
1133 | g = hwgroup->hwif; | |
1134 | while (g->next != hwif) | |
1135 | g = g->next; | |
1136 | g->next = hwif->next; | |
1137 | if (hwgroup->hwif == hwif) { | |
1138 | /* Impossible. */ | |
1139 | printk(KERN_ERR "Duh. Uninitialized hwif listed as active hwif.\n"); | |
1140 | hwgroup->hwif = g; | |
1141 | } | |
1142 | BUG_ON(hwgroup->hwif == hwif); | |
1143 | } | |
1144 | spin_unlock_irq(&ide_lock); | |
1145 | out_up: | |
ef29888e | 1146 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1147 | return 1; |
1148 | } | |
1149 | ||
1150 | static int ata_lock(dev_t dev, void *data) | |
1151 | { | |
1152 | /* FIXME: we want to pin hwif down */ | |
1153 | return 0; | |
1154 | } | |
1155 | ||
1156 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1157 | { | |
1158 | ide_hwif_t *hwif = data; | |
1159 | int unit = *part >> PARTN_BITS; | |
1160 | ide_drive_t *drive = &hwif->drives[unit]; | |
1161 | if (!drive->present) | |
1162 | return NULL; | |
1163 | ||
1164 | if (drive->media == ide_disk) | |
1165 | request_module("ide-disk"); | |
1166 | if (drive->scsi) | |
1167 | request_module("ide-scsi"); | |
1168 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1169 | request_module("ide-cd"); | |
1170 | if (drive->media == ide_tape) | |
1171 | request_module("ide-tape"); | |
1172 | if (drive->media == ide_floppy) | |
1173 | request_module("ide-floppy"); | |
1174 | ||
1175 | return NULL; | |
1176 | } | |
1177 | ||
1178 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1179 | { | |
1180 | struct gendisk *p = data; | |
1181 | *part &= (1 << PARTN_BITS) - 1; | |
1182 | return &p->kobj; | |
1183 | } | |
1184 | ||
1185 | static int exact_lock(dev_t dev, void *data) | |
1186 | { | |
1187 | struct gendisk *p = data; | |
1188 | ||
1189 | if (!get_disk(p)) | |
1190 | return -1; | |
1191 | return 0; | |
1192 | } | |
1193 | ||
1194 | void ide_register_region(struct gendisk *disk) | |
1195 | { | |
1196 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1197 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1198 | } | |
1199 | ||
1200 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1201 | ||
1202 | void ide_unregister_region(struct gendisk *disk) | |
1203 | { | |
1204 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1205 | disk->minors); | |
1206 | } | |
1207 | ||
1208 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1209 | ||
1210 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1211 | { | |
1212 | ide_hwif_t *hwif = drive->hwif; | |
1213 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1214 | ||
1215 | disk->major = hwif->major; | |
1216 | disk->first_minor = unit << PARTN_BITS; | |
1217 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1218 | disk->queue = drive->queue; | |
1219 | } | |
1220 | ||
1221 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1222 | ||
8604affd BZ |
1223 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1224 | { | |
1225 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1226 | ||
1227 | if (drive == drive->next) { | |
1228 | /* special case: last drive from hwgroup. */ | |
1229 | BUG_ON(hwgroup->drive != drive); | |
1230 | hwgroup->drive = NULL; | |
1231 | } else { | |
1232 | ide_drive_t *walk; | |
1233 | ||
1234 | walk = hwgroup->drive; | |
1235 | while (walk->next != drive) | |
1236 | walk = walk->next; | |
1237 | walk->next = drive->next; | |
1238 | if (hwgroup->drive == drive) { | |
1239 | hwgroup->drive = drive->next; | |
1240 | hwgroup->hwif = hwgroup->drive->hwif; | |
1241 | } | |
1242 | } | |
1243 | BUG_ON(hwgroup->drive == drive); | |
1244 | } | |
1245 | ||
1da177e4 LT |
1246 | static void drive_release_dev (struct device *dev) |
1247 | { | |
1248 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1249 | ||
8604affd | 1250 | spin_lock_irq(&ide_lock); |
8604affd | 1251 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1252 | kfree(drive->id); |
1253 | drive->id = NULL; | |
8604affd BZ |
1254 | drive->present = 0; |
1255 | /* Messed up locking ... */ | |
1256 | spin_unlock_irq(&ide_lock); | |
1257 | blk_cleanup_queue(drive->queue); | |
1258 | spin_lock_irq(&ide_lock); | |
1259 | drive->queue = NULL; | |
1260 | spin_unlock_irq(&ide_lock); | |
1261 | ||
f36d4024 | 1262 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1263 | } |
1264 | ||
1265 | /* | |
1266 | * init_gendisk() (as opposed to ide_geninit) is called for each major device, | |
1267 | * after probing for drives, to allocate partition tables and other data | |
1268 | * structures needed for the routines in genhd.c. ide_geninit() gets called | |
1269 | * somewhat later, during the partition check. | |
1270 | */ | |
1271 | static void init_gendisk (ide_hwif_t *hwif) | |
1272 | { | |
1273 | unsigned int unit; | |
1274 | ||
1275 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
1276 | ide_drive_t * drive = &hwif->drives[unit]; | |
1277 | ide_add_generic_settings(drive); | |
1278 | snprintf(drive->gendev.bus_id,BUS_ID_SIZE,"%u.%u", | |
1279 | hwif->index,unit); | |
1280 | drive->gendev.parent = &hwif->gendev; | |
1281 | drive->gendev.bus = &ide_bus_type; | |
1282 | drive->gendev.driver_data = drive; | |
1283 | drive->gendev.release = drive_release_dev; | |
1da177e4 LT |
1284 | } |
1285 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, | |
1286 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1287 | } | |
1288 | ||
1289 | static int hwif_init(ide_hwif_t *hwif) | |
1290 | { | |
1291 | int old_irq; | |
1292 | ||
1293 | /* Return success if no device is connected */ | |
1294 | if (!hwif->present) | |
1295 | return 1; | |
1296 | ||
1297 | if (!hwif->irq) { | |
1298 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) | |
1299 | { | |
1300 | printk("%s: DISABLED, NO IRQ\n", hwif->name); | |
1301 | return (hwif->present = 0); | |
1302 | } | |
1303 | } | |
1304 | #ifdef CONFIG_BLK_DEV_HD | |
1305 | if (hwif->irq == HD_IRQ && hwif->io_ports[IDE_DATA_OFFSET] != HD_DATA) { | |
1306 | printk("%s: CANNOT SHARE IRQ WITH OLD " | |
1307 | "HARDDISK DRIVER (hd.c)\n", hwif->name); | |
1308 | return (hwif->present = 0); | |
1309 | } | |
1310 | #endif /* CONFIG_BLK_DEV_HD */ | |
1311 | ||
1312 | /* we set it back to 1 if all is ok below */ | |
1313 | hwif->present = 0; | |
1314 | ||
1315 | if (register_blkdev(hwif->major, hwif->name)) | |
1316 | return 0; | |
1317 | ||
1318 | if (!hwif->sg_max_nents) | |
1319 | hwif->sg_max_nents = PRD_ENTRIES; | |
1320 | ||
45711f1a | 1321 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1322 | GFP_KERNEL); |
1323 | if (!hwif->sg_table) { | |
1324 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1325 | goto out; | |
1326 | } | |
45711f1a JA |
1327 | |
1328 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1329 | |
1330 | if (init_irq(hwif) == 0) | |
1331 | goto done; | |
1332 | ||
1333 | old_irq = hwif->irq; | |
1334 | /* | |
1335 | * It failed to initialise. Find the default IRQ for | |
1336 | * this port and try that. | |
1337 | */ | |
1338 | if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) { | |
1339 | printk("%s: Disabled unable to get IRQ %d.\n", | |
1340 | hwif->name, old_irq); | |
1341 | goto out; | |
1342 | } | |
1343 | if (init_irq(hwif)) { | |
1344 | printk("%s: probed IRQ %d and default IRQ %d failed.\n", | |
1345 | hwif->name, old_irq, hwif->irq); | |
1346 | goto out; | |
1347 | } | |
1348 | printk("%s: probed IRQ %d failed, using default.\n", | |
1349 | hwif->name, hwif->irq); | |
1350 | ||
1351 | done: | |
1352 | init_gendisk(hwif); | |
e3a59b4d HR |
1353 | |
1354 | ide_acpi_init(hwif); | |
1355 | ||
1da177e4 LT |
1356 | hwif->present = 1; /* success */ |
1357 | return 1; | |
1358 | ||
1359 | out: | |
1360 | unregister_blkdev(hwif->major, hwif->name); | |
1361 | return 0; | |
1362 | } | |
1363 | ||
9601a607 BZ |
1364 | static void hwif_register_devices(ide_hwif_t *hwif) |
1365 | { | |
1366 | unsigned int i; | |
1367 | ||
1368 | for (i = 0; i < MAX_DRIVES; i++) { | |
1369 | ide_drive_t *drive = &hwif->drives[i]; | |
1370 | ||
1371 | if (drive->present) { | |
1372 | int ret = device_register(&drive->gendev); | |
1373 | ||
1374 | if (ret < 0) | |
1375 | printk(KERN_WARNING "IDE: %s: " | |
1376 | "device_register error: %d\n", | |
1377 | __FUNCTION__, ret); | |
1378 | } | |
1379 | } | |
1380 | } | |
1381 | ||
1da177e4 LT |
1382 | int ideprobe_init (void) |
1383 | { | |
1384 | unsigned int index; | |
1385 | int probe[MAX_HWIFS]; | |
1386 | ||
1387 | memset(probe, 0, MAX_HWIFS * sizeof(int)); | |
1388 | for (index = 0; index < MAX_HWIFS; ++index) | |
1389 | probe[index] = !ide_hwifs[index].present; | |
1390 | ||
1391 | for (index = 0; index < MAX_HWIFS; ++index) | |
1392 | if (probe[index]) | |
fd9bb539 | 1393 | probe_hwif(&ide_hwifs[index]); |
1da177e4 LT |
1394 | for (index = 0; index < MAX_HWIFS; ++index) |
1395 | if (probe[index]) | |
1396 | hwif_init(&ide_hwifs[index]); | |
1397 | for (index = 0; index < MAX_HWIFS; ++index) { | |
1398 | if (probe[index]) { | |
1399 | ide_hwif_t *hwif = &ide_hwifs[index]; | |
1da177e4 LT |
1400 | if (!hwif->present) |
1401 | continue; | |
1402 | if (hwif->chipset == ide_unknown || hwif->chipset == ide_forced) | |
1403 | hwif->chipset = ide_generic; | |
9601a607 | 1404 | hwif_register_devices(hwif); |
1da177e4 LT |
1405 | } |
1406 | } | |
5cbf79cd BZ |
1407 | for (index = 0; index < MAX_HWIFS; ++index) |
1408 | if (probe[index]) | |
1409 | ide_proc_register_port(&ide_hwifs[index]); | |
1da177e4 LT |
1410 | return 0; |
1411 | } | |
1412 | ||
1413 | EXPORT_SYMBOL_GPL(ideprobe_init); | |
8447d9d5 BZ |
1414 | |
1415 | int ide_device_add(u8 idx[4]) | |
1416 | { | |
1417 | int i, rc = 0; | |
1418 | ||
1419 | for (i = 0; i < 4; i++) { | |
1420 | if (idx[i] != 0xff) | |
1421 | rc |= probe_hwif_init(&ide_hwifs[idx[i]]); | |
1422 | } | |
1423 | ||
1424 | for (i = 0; i < 4; i++) { | |
1425 | if (idx[i] != 0xff) | |
1426 | ide_proc_register_port(&ide_hwifs[idx[i]]); | |
1427 | } | |
1428 | ||
1429 | return rc; | |
1430 | } | |
1431 | ||
1432 | EXPORT_SYMBOL_GPL(ide_device_add); |