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Commit | Line | Data |
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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 | ||
1da177e4 LT |
92 | if (id->max_multsect) { |
93 | #ifdef CONFIG_IDEDISK_MULTI_MODE | |
df1f8378 BZ |
94 | if ((id->max_multsect / 2) > 1) { |
95 | id->multsect = id->max_multsect; | |
96 | id->multsect_valid = 1; | |
97 | } else { | |
98 | id->multsect = 0; | |
99 | id->multsect_valid = 0; | |
100 | } | |
101 | drive->mult_req = id->multsect; | |
1da177e4 | 102 | #endif |
df1f8378 BZ |
103 | if ((id->multsect_valid & 1) && id->multsect) |
104 | drive->special.b.set_multmode = 1; | |
1da177e4 LT |
105 | } |
106 | } | |
107 | ||
1da177e4 LT |
108 | /** |
109 | * do_identify - identify a drive | |
110 | * @drive: drive to identify | |
111 | * @cmd: command used | |
112 | * | |
113 | * Called when we have issued a drive identify command to | |
114 | * read and parse the results. This function is run with | |
115 | * interrupts disabled. | |
116 | */ | |
117 | ||
118 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
119 | { | |
120 | ide_hwif_t *hwif = HWIF(drive); | |
121 | int bswap = 1; | |
122 | struct hd_driveid *id; | |
123 | ||
124 | id = drive->id; | |
125 | /* read 512 bytes of id info */ | |
374e042c | 126 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
1da177e4 LT |
127 | |
128 | drive->id_read = 1; | |
129 | local_irq_enable(); | |
7b9f25b5 BZ |
130 | #ifdef DEBUG |
131 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
132 | ide_dump_identify((u8 *)id); | |
133 | #endif | |
1da177e4 LT |
134 | ide_fix_driveid(id); |
135 | ||
1da177e4 LT |
136 | /* |
137 | * WIN_IDENTIFY returns little-endian info, | |
138 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
139 | */ | |
140 | if (cmd == WIN_PIDENTIFY) { | |
141 | if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */ | |
142 | || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */ | |
143 | || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */ | |
144 | /* Vertos drives may still be weird */ | |
145 | bswap ^= 1; | |
146 | } | |
147 | ide_fixstring(id->model, sizeof(id->model), bswap); | |
148 | ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap); | |
149 | ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap); | |
150 | ||
699b052a TH |
151 | /* we depend on this a lot! */ |
152 | id->model[sizeof(id->model)-1] = '\0'; | |
153 | ||
1da177e4 LT |
154 | if (strstr(id->model, "E X A B Y T E N E S T")) |
155 | goto err_misc; | |
156 | ||
1b8ebad8 BZ |
157 | printk(KERN_INFO "%s: %s, ", drive->name, id->model); |
158 | ||
1da177e4 LT |
159 | drive->present = 1; |
160 | drive->dead = 0; | |
161 | ||
162 | /* | |
163 | * Check for an ATAPI device | |
164 | */ | |
165 | if (cmd == WIN_PIDENTIFY) { | |
166 | u8 type = (id->config >> 8) & 0x1f; | |
1b8ebad8 BZ |
167 | |
168 | printk(KERN_CONT "ATAPI "); | |
1da177e4 LT |
169 | switch (type) { |
170 | case ide_floppy: | |
171 | if (!strstr(id->model, "CD-ROM")) { | |
172 | if (!strstr(id->model, "oppy") && | |
173 | !strstr(id->model, "poyp") && | |
174 | !strstr(id->model, "ZIP")) | |
1b8ebad8 | 175 | printk(KERN_CONT "cdrom or floppy?, assuming "); |
1da177e4 | 176 | if (drive->media != ide_cdrom) { |
1b8ebad8 | 177 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
178 | drive->removable = 1; |
179 | break; | |
180 | } | |
181 | } | |
182 | /* Early cdrom models used zero */ | |
183 | type = ide_cdrom; | |
184 | case ide_cdrom: | |
185 | drive->removable = 1; | |
186 | #ifdef CONFIG_PPC | |
187 | /* kludge for Apple PowerBook internal zip */ | |
188 | if (!strstr(id->model, "CD-ROM") && | |
189 | strstr(id->model, "ZIP")) { | |
1b8ebad8 | 190 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
191 | type = ide_floppy; |
192 | break; | |
193 | } | |
194 | #endif | |
1b8ebad8 | 195 | printk(KERN_CONT "CD/DVD-ROM"); |
1da177e4 LT |
196 | break; |
197 | case ide_tape: | |
1b8ebad8 | 198 | printk(KERN_CONT "TAPE"); |
1da177e4 LT |
199 | break; |
200 | case ide_optical: | |
1b8ebad8 | 201 | printk(KERN_CONT "OPTICAL"); |
1da177e4 LT |
202 | drive->removable = 1; |
203 | break; | |
204 | default: | |
1b8ebad8 | 205 | printk(KERN_CONT "UNKNOWN (type %d)", type); |
1da177e4 LT |
206 | break; |
207 | } | |
1b8ebad8 | 208 | printk(KERN_CONT " drive\n"); |
1da177e4 LT |
209 | drive->media = type; |
210 | /* an ATAPI device ignores DRDY */ | |
211 | drive->ready_stat = 0; | |
212 | return; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Not an ATAPI device: looks like a "regular" hard disk | |
217 | */ | |
98109337 RP |
218 | |
219 | /* | |
220 | * 0x848a = CompactFlash device | |
221 | * These are *not* removable in Linux definition of the term | |
222 | */ | |
223 | ||
224 | if ((id->config != 0x848a) && (id->config & (1<<7))) | |
1da177e4 LT |
225 | drive->removable = 1; |
226 | ||
1da177e4 | 227 | drive->media = ide_disk; |
1b8ebad8 BZ |
228 | |
229 | printk(KERN_CONT "%s DISK drive\n", | |
230 | (id->config == 0x848a) ? "CFA" : "ATA"); | |
cd3dbc99 | 231 | |
1da177e4 LT |
232 | return; |
233 | ||
234 | err_misc: | |
235 | kfree(id); | |
236 | drive->present = 0; | |
237 | return; | |
238 | } | |
239 | ||
240 | /** | |
241 | * actual_try_to_identify - send ata/atapi identify | |
242 | * @drive: drive to identify | |
243 | * @cmd: command to use | |
244 | * | |
245 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
246 | * and waits for a response. It also monitors irqs while this is | |
247 | * happening, in hope of automatically determining which one is | |
248 | * being used by the interface. | |
249 | * | |
250 | * Returns: 0 device was identified | |
251 | * 1 device timed-out (no response to identify request) | |
252 | * 2 device aborted the command (refused to identify itself) | |
253 | */ | |
254 | ||
255 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
256 | { | |
257 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 258 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 259 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 260 | int use_altstatus = 0, rc; |
1da177e4 LT |
261 | unsigned long timeout; |
262 | u8 s = 0, a = 0; | |
263 | ||
264 | /* take a deep breath */ | |
265 | msleep(50); | |
266 | ||
4c3032d8 | 267 | if (io_ports->ctl_addr) { |
374e042c BZ |
268 | a = tp_ops->read_altstatus(hwif); |
269 | s = tp_ops->read_status(hwif); | |
c47137a9 | 270 | if ((a ^ s) & ~INDEX_STAT) |
1da177e4 | 271 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
272 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
273 | "instead of ALTSTATUS(0x%02x)\n", | |
274 | drive->name, s, a); | |
275 | else | |
1da177e4 | 276 | /* use non-intrusive polling */ |
c47137a9 BZ |
277 | use_altstatus = 1; |
278 | } | |
1da177e4 LT |
279 | |
280 | /* set features register for atapi | |
281 | * identify command to be sure of reply | |
282 | */ | |
4e65837b BZ |
283 | if (cmd == WIN_PIDENTIFY) { |
284 | ide_task_t task; | |
285 | ||
286 | memset(&task, 0, sizeof(task)); | |
287 | /* disable DMA & overlap */ | |
288 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
289 | ||
374e042c | 290 | tp_ops->tf_load(drive, &task); |
4e65837b | 291 | } |
1da177e4 LT |
292 | |
293 | /* ask drive for ID */ | |
374e042c | 294 | tp_ops->exec_command(hwif, cmd); |
1da177e4 LT |
295 | |
296 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
297 | timeout += jiffies; | |
298 | do { | |
299 | if (time_after(jiffies, timeout)) { | |
300 | /* drive timed-out */ | |
301 | return 1; | |
302 | } | |
303 | /* give drive a breather */ | |
304 | msleep(50); | |
374e042c BZ |
305 | s = use_altstatus ? tp_ops->read_altstatus(hwif) |
306 | : tp_ops->read_status(hwif); | |
c47137a9 | 307 | } while (s & BUSY_STAT); |
1da177e4 LT |
308 | |
309 | /* wait for IRQ and DRQ_STAT */ | |
310 | msleep(50); | |
374e042c | 311 | s = tp_ops->read_status(hwif); |
c47137a9 BZ |
312 | |
313 | if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
314 | unsigned long flags; |
315 | ||
316 | /* local CPU only; some systems need this */ | |
317 | local_irq_save(flags); | |
318 | /* drive returned ID */ | |
319 | do_identify(drive, cmd); | |
320 | /* drive responded with ID */ | |
321 | rc = 0; | |
322 | /* clear drive IRQ */ | |
374e042c | 323 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
324 | local_irq_restore(flags); |
325 | } else { | |
326 | /* drive refused ID */ | |
327 | rc = 2; | |
328 | } | |
329 | return rc; | |
330 | } | |
331 | ||
332 | /** | |
333 | * try_to_identify - try to identify a drive | |
334 | * @drive: drive to probe | |
335 | * @cmd: command to use | |
336 | * | |
337 | * Issue the identify command and then do IRQ probing to | |
338 | * complete the identification when needed by finding the | |
339 | * IRQ the drive is attached to | |
340 | */ | |
341 | ||
342 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
343 | { | |
344 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 345 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
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 | */ | |
4c3032d8 | 356 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
357 | if (!hwif->irq) { |
358 | autoprobe = 1; | |
359 | cookie = probe_irq_on(); | |
1da177e4 | 360 | } |
374e042c | 361 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
362 | } |
363 | ||
364 | retval = actual_try_to_identify(drive, cmd); | |
365 | ||
366 | if (autoprobe) { | |
367 | int irq; | |
81ca6919 | 368 | |
374e042c | 369 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 370 | /* clear drive IRQ */ |
374e042c | 371 | (void)tp_ops->read_status(hwif); |
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 | */ | |
1b8ebad8 | 381 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
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); | |
374e042c | 396 | stat = hwif->tp_ops->read_status(hwif); |
3a5015cc BZ |
397 | if ((stat & BUSY_STAT) == 0) |
398 | return 0; | |
399 | } while (time_before(jiffies, timeout)); | |
400 | ||
401 | return 1; | |
402 | } | |
1da177e4 | 403 | |
1f2efb82 BZ |
404 | static u8 ide_read_device(ide_drive_t *drive) |
405 | { | |
406 | ide_task_t task; | |
407 | ||
408 | memset(&task, 0, sizeof(task)); | |
409 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
410 | ||
374e042c | 411 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
412 | |
413 | return task.tf.device; | |
414 | } | |
415 | ||
1da177e4 LT |
416 | /** |
417 | * do_probe - probe an IDE device | |
418 | * @drive: drive to probe | |
419 | * @cmd: command to use | |
420 | * | |
421 | * do_probe() has the difficult job of finding a drive if it exists, | |
422 | * without getting hung up if it doesn't exist, without trampling on | |
423 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
424 | * | |
425 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
426 | * but does not respond right away, the probe will "hang in there" | |
427 | * for the maximum wait time (about 30 seconds), otherwise it will | |
428 | * exit much more quickly. | |
429 | * | |
430 | * Returns: 0 device was identified | |
431 | * 1 device timed-out (no response to identify request) | |
432 | * 2 device aborted the command (refused to identify itself) | |
433 | * 3 bad status from device (possible for ATAPI drives) | |
434 | * 4 probe was not attempted because failure was obvious | |
435 | */ | |
436 | ||
437 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
438 | { | |
1da177e4 | 439 | ide_hwif_t *hwif = HWIF(drive); |
374e042c | 440 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 BZ |
441 | int rc; |
442 | u8 stat; | |
1da177e4 LT |
443 | |
444 | if (drive->present) { | |
445 | /* avoid waiting for inappropriate probes */ | |
446 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
447 | return 4; | |
448 | } | |
449 | #ifdef DEBUG | |
1b8ebad8 | 450 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
1da177e4 LT |
451 | drive->name, drive->present, drive->media, |
452 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
453 | #endif | |
454 | ||
455 | /* needed for some systems | |
456 | * (e.g. crw9624 as drive0 with disk as slave) | |
457 | */ | |
458 | msleep(50); | |
459 | SELECT_DRIVE(drive); | |
460 | msleep(50); | |
1f2efb82 BZ |
461 | |
462 | if (ide_read_device(drive) != drive->select.all && !drive->present) { | |
1da177e4 LT |
463 | if (drive->select.b.unit != 0) { |
464 | /* exit with drive0 selected */ | |
465 | SELECT_DRIVE(&hwif->drives[0]); | |
466 | /* allow BUSY_STAT to assert & clear */ | |
467 | msleep(50); | |
468 | } | |
469 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
470 | return 3; | |
471 | } | |
472 | ||
374e042c | 473 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
474 | |
475 | if (OK_STAT(stat, READY_STAT, BUSY_STAT) || | |
1da177e4 LT |
476 | drive->present || cmd == WIN_PIDENTIFY) { |
477 | /* send cmd and wait */ | |
478 | if ((rc = try_to_identify(drive, cmd))) { | |
479 | /* failed: try again */ | |
480 | rc = try_to_identify(drive,cmd); | |
481 | } | |
57b55275 | 482 | |
374e042c | 483 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
484 | |
485 | if (stat == (BUSY_STAT | READY_STAT)) | |
1da177e4 LT |
486 | return 4; |
487 | ||
cc12175f | 488 | if (rc == 1 && cmd == WIN_PIDENTIFY) { |
57b55275 BZ |
489 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
490 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 491 | msleep(50); |
e81a3bde | 492 | SELECT_DRIVE(drive); |
1da177e4 | 493 | msleep(50); |
374e042c | 494 | tp_ops->exec_command(hwif, WIN_SRST); |
3a5015cc | 495 | (void)ide_busy_sleep(hwif); |
1da177e4 LT |
496 | rc = try_to_identify(drive, cmd); |
497 | } | |
57b55275 BZ |
498 | |
499 | /* ensure drive IRQ is clear */ | |
374e042c | 500 | stat = tp_ops->read_status(hwif); |
57b55275 | 501 | |
1da177e4 | 502 | if (rc == 1) |
57b55275 BZ |
503 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
504 | drive->name, stat); | |
1da177e4 LT |
505 | } else { |
506 | /* not present or maybe ATAPI */ | |
507 | rc = 3; | |
508 | } | |
509 | if (drive->select.b.unit != 0) { | |
510 | /* exit with drive0 selected */ | |
511 | SELECT_DRIVE(&hwif->drives[0]); | |
512 | msleep(50); | |
513 | /* ensure drive irq is clear */ | |
374e042c | 514 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
515 | } |
516 | return rc; | |
517 | } | |
518 | ||
519 | /* | |
520 | * | |
521 | */ | |
522 | static void enable_nest (ide_drive_t *drive) | |
523 | { | |
524 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 525 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 526 | u8 stat; |
1da177e4 | 527 | |
1b8ebad8 BZ |
528 | printk(KERN_INFO "%s: enabling %s -- ", hwif->name, drive->id->model); |
529 | ||
1da177e4 LT |
530 | SELECT_DRIVE(drive); |
531 | msleep(50); | |
374e042c | 532 | tp_ops->exec_command(hwif, EXABYTE_ENABLE_NEST); |
3a5015cc BZ |
533 | |
534 | if (ide_busy_sleep(hwif)) { | |
535 | printk(KERN_CONT "failed (timeout)\n"); | |
536 | return; | |
537 | } | |
1da177e4 LT |
538 | |
539 | msleep(50); | |
540 | ||
374e042c | 541 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
542 | |
543 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
544 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
545 | else | |
546 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
547 | |
548 | /* if !(success||timed-out) */ | |
549 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
550 | /* look for ATAPI device */ | |
551 | (void) do_probe(drive, WIN_PIDENTIFY); | |
552 | } | |
553 | } | |
554 | ||
555 | /** | |
556 | * probe_for_drives - upper level drive probe | |
557 | * @drive: drive to probe for | |
558 | * | |
559 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
560 | * and presents things to the user as needed. | |
561 | * | |
562 | * Returns: 0 no device was found | |
563 | * 1 device was found (note: drive->present might | |
564 | * still be 0) | |
565 | */ | |
566 | ||
567 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
568 | { | |
569 | /* | |
570 | * In order to keep things simple we have an id | |
571 | * block for all drives at all times. If the device | |
572 | * is pre ATA or refuses ATA/ATAPI identify we | |
573 | * will add faked data to this. | |
574 | * | |
575 | * Also note that 0 everywhere means "can't do X" | |
576 | */ | |
577 | ||
f5e3c2fa | 578 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
579 | drive->id_read = 0; |
580 | if(drive->id == NULL) | |
581 | { | |
582 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
583 | return 0; | |
584 | } | |
1da177e4 LT |
585 | strcpy(drive->id->model, "UNKNOWN"); |
586 | ||
587 | /* skip probing? */ | |
588 | if (!drive->noprobe) | |
589 | { | |
590 | /* if !(success||timed-out) */ | |
591 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
592 | /* look for ATAPI device */ | |
593 | (void) do_probe(drive, WIN_PIDENTIFY); | |
594 | } | |
1da177e4 LT |
595 | if (!drive->present) |
596 | /* drive not found */ | |
597 | return 0; | |
78595575 AC |
598 | if (strstr(drive->id->model, "E X A B Y T E N E S T")) |
599 | enable_nest(drive); | |
1da177e4 LT |
600 | |
601 | /* identification failed? */ | |
602 | if (!drive->id_read) { | |
603 | if (drive->media == ide_disk) { | |
604 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
605 | drive->name, drive->cyl, | |
606 | drive->head, drive->sect); | |
607 | } else if (drive->media == ide_cdrom) { | |
608 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
609 | } else { | |
610 | /* nuke it */ | |
611 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
612 | drive->present = 0; | |
613 | } | |
614 | } | |
615 | /* drive was found */ | |
616 | } | |
617 | if(!drive->present) | |
618 | return 0; | |
619 | /* The drive wasn't being helpful. Add generic info only */ | |
620 | if (drive->id_read == 0) { | |
621 | generic_id(drive); | |
622 | return 1; | |
623 | } | |
624 | ||
625 | if (drive->media == ide_disk) { | |
626 | ide_disk_init_chs(drive); | |
627 | ide_disk_init_mult_count(drive); | |
628 | } | |
629 | ||
630 | return drive->present; | |
631 | } | |
632 | ||
fc410698 | 633 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
634 | { |
635 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
636 | ||
f36d4024 | 637 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
638 | } |
639 | ||
f74c9141 | 640 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 641 | { |
349ae23f RD |
642 | int ret; |
643 | ||
1da177e4 LT |
644 | /* register with global device tree */ |
645 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
646 | hwif->gendev.driver_data = hwif; | |
647 | if (hwif->gendev.parent == NULL) { | |
36501650 BZ |
648 | if (hwif->dev) |
649 | hwif->gendev.parent = hwif->dev; | |
1da177e4 LT |
650 | else |
651 | /* Would like to do = &device_legacy */ | |
652 | hwif->gendev.parent = NULL; | |
653 | } | |
654 | hwif->gendev.release = hwif_release_dev; | |
349ae23f | 655 | ret = device_register(&hwif->gendev); |
f74c9141 | 656 | if (ret < 0) { |
349ae23f | 657 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 658 | __func__, ret); |
f74c9141 BZ |
659 | goto out; |
660 | } | |
661 | ||
716ad875 GKH |
662 | hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, |
663 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
664 | if (IS_ERR(hwif->portdev)) { |
665 | ret = PTR_ERR(hwif->portdev); | |
666 | device_unregister(&hwif->gendev); | |
667 | } | |
f74c9141 BZ |
668 | out: |
669 | return ret; | |
1da177e4 LT |
670 | } |
671 | ||
c860a8f2 BZ |
672 | /** |
673 | * ide_port_wait_ready - wait for port to become ready | |
674 | * @hwif: IDE port | |
675 | * | |
676 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
677 | * platforms. Typical cases are: | |
678 | * | |
679 | * - The firmware hard reset the disk before booting the kernel, | |
680 | * the drive is still doing it's poweron-reset sequence, that | |
681 | * can take up to 30 seconds. | |
682 | * | |
683 | * - The firmware does nothing (or no firmware), the device is | |
684 | * still in POST state (same as above actually). | |
685 | * | |
686 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
687 | * their reset sequence even when they are non-selected slave | |
688 | * devices, thus preventing discovery of the main HD. | |
689 | * | |
690 | * Doing this wait-for-non-busy should not harm any existing | |
691 | * configuration and fix some issues like the above. | |
692 | * | |
693 | * BenH. | |
694 | * | |
695 | * Returns 0 on success, error code (< 0) otherwise. | |
696 | */ | |
697 | ||
698 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 699 | { |
8266105b | 700 | int unit, rc; |
1da177e4 LT |
701 | |
702 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
703 | ||
704 | /* Let HW settle down a bit from whatever init state we | |
705 | * come from */ | |
706 | mdelay(2); | |
707 | ||
708 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
709 | * I know of at least one disk who takes 31 seconds, I use 35 | |
710 | * here to be safe | |
711 | */ | |
712 | rc = ide_wait_not_busy(hwif, 35000); | |
713 | if (rc) | |
714 | return rc; | |
715 | ||
716 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
717 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
718 | ide_drive_t *drive = &hwif->drives[unit]; | |
719 | ||
720 | /* Ignore disks that we will not probe for later. */ | |
721 | if (!drive->noprobe || drive->present) { | |
722 | SELECT_DRIVE(drive); | |
374e042c | 723 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
724 | mdelay(2); |
725 | rc = ide_wait_not_busy(hwif, 35000); | |
726 | if (rc) | |
727 | goto out; | |
728 | } else | |
729 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
730 | drive->name); | |
731 | } | |
732 | out: | |
1da177e4 | 733 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
734 | if (unit) |
735 | SELECT_DRIVE(&hwif->drives[0]); | |
736 | ||
1da177e4 LT |
737 | return rc; |
738 | } | |
739 | ||
740 | /** | |
741 | * ide_undecoded_slave - look for bad CF adapters | |
f01393e4 | 742 | * @drive1: drive |
1da177e4 LT |
743 | * |
744 | * Analyse the drives on the interface and attempt to decide if we | |
745 | * have the same drive viewed twice. This occurs with crap CF adapters | |
746 | * and PCMCIA sometimes. | |
747 | */ | |
748 | ||
f01393e4 | 749 | void ide_undecoded_slave(ide_drive_t *drive1) |
1da177e4 | 750 | { |
f01393e4 | 751 | ide_drive_t *drive0 = &drive1->hwif->drives[0]; |
1da177e4 | 752 | |
f01393e4 | 753 | if ((drive1->dn & 1) == 0 || drive0->present == 0) |
1da177e4 LT |
754 | return; |
755 | ||
756 | /* If the models don't match they are not the same product */ | |
757 | if (strcmp(drive0->id->model, drive1->id->model)) | |
758 | return; | |
759 | ||
760 | /* Serial numbers do not match */ | |
761 | if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20)) | |
762 | return; | |
763 | ||
764 | /* No serial number, thankfully very rare for CF */ | |
765 | if (drive0->id->serial_no[0] == 0) | |
766 | return; | |
767 | ||
768 | /* Appears to be an IDE flash adapter with decode bugs */ | |
769 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
770 | ||
771 | drive1->present = 0; | |
772 | } | |
773 | ||
774 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
775 | ||
9d501529 | 776 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 777 | { |
1da177e4 LT |
778 | unsigned long flags; |
779 | unsigned int irqd; | |
a14dc574 BZ |
780 | int unit, rc = -ENODEV; |
781 | ||
782 | BUG_ON(hwif->present); | |
1da177e4 | 783 | |
e53cd458 | 784 | if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) |
9d501529 | 785 | return -EACCES; |
1da177e4 | 786 | |
1da177e4 LT |
787 | /* |
788 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
789 | * we'll install our IRQ driver much later... | |
790 | */ | |
791 | irqd = hwif->irq; | |
792 | if (irqd) | |
793 | disable_irq(hwif->irq); | |
794 | ||
795 | local_irq_set(flags); | |
796 | ||
c860a8f2 | 797 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
798 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
799 | ||
800 | /* | |
f367bed0 BZ |
801 | * Second drive should only exist if first drive was found, |
802 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 803 | */ |
f367bed0 | 804 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 LT |
805 | ide_drive_t *drive = &hwif->drives[unit]; |
806 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
807 | (void) probe_for_drive(drive); | |
a14dc574 BZ |
808 | if (drive->present) |
809 | rc = 0; | |
1da177e4 | 810 | } |
e460a597 | 811 | |
1da177e4 | 812 | local_irq_restore(flags); |
e460a597 | 813 | |
1da177e4 LT |
814 | /* |
815 | * Use cached IRQ number. It might be (and is...) changed by probe | |
816 | * code above | |
817 | */ | |
818 | if (irqd) | |
819 | enable_irq(irqd); | |
820 | ||
a14dc574 | 821 | return rc; |
e84e7ea7 BZ |
822 | } |
823 | ||
824 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
825 | { | |
ac95beed | 826 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
827 | int unit; |
828 | ||
f01393e4 BZ |
829 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
830 | ide_drive_t *drive = &hwif->drives[unit]; | |
831 | ||
ac95beed BZ |
832 | if (drive->present && port_ops && port_ops->quirkproc) |
833 | port_ops->quirkproc(drive); | |
f01393e4 | 834 | } |
0380dad4 | 835 | |
1da177e4 LT |
836 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
837 | ide_drive_t *drive = &hwif->drives[unit]; | |
838 | ||
839 | if (drive->present) { | |
207daeaa | 840 | ide_set_max_pio(drive); |
1da177e4 | 841 | |
1da177e4 LT |
842 | drive->nice1 = 1; |
843 | ||
5e37bdc0 | 844 | if (hwif->dma_ops) |
8c0697cc | 845 | ide_set_dma(drive); |
1da177e4 LT |
846 | } |
847 | } | |
208a08f7 KG |
848 | |
849 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
850 | ide_drive_t *drive = &hwif->drives[unit]; | |
851 | ||
807b90d0 | 852 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
208a08f7 KG |
853 | drive->no_io_32bit = 1; |
854 | else | |
855 | drive->no_io_32bit = drive->id->dword_io ? 1 : 0; | |
856 | } | |
1da177e4 LT |
857 | } |
858 | ||
1da177e4 LT |
859 | #if MAX_HWIFS > 1 |
860 | /* | |
861 | * save_match() is used to simplify logic in init_irq() below. | |
862 | * | |
863 | * A loophole here is that we may not know about a particular | |
864 | * hwif's irq until after that hwif is actually probed/initialized.. | |
865 | * This could be a problem for the case where an hwif is on a | |
866 | * dual interface that requires serialization (eg. cmd640) and another | |
867 | * hwif using one of the same irqs is initialized beforehand. | |
868 | * | |
869 | * This routine detects and reports such situations, but does not fix them. | |
870 | */ | |
871 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
872 | { | |
873 | ide_hwif_t *m = *match; | |
874 | ||
875 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
876 | if (!new->hwgroup) | |
877 | return; | |
1b8ebad8 | 878 | printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", |
1da177e4 LT |
879 | hwif->name, new->name, m->name); |
880 | } | |
881 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
882 | *match = new; | |
883 | } | |
884 | #endif /* MAX_HWIFS > 1 */ | |
885 | ||
886 | /* | |
887 | * init request queue | |
888 | */ | |
889 | static int ide_init_queue(ide_drive_t *drive) | |
890 | { | |
165125e1 | 891 | struct request_queue *q; |
1da177e4 LT |
892 | ide_hwif_t *hwif = HWIF(drive); |
893 | int max_sectors = 256; | |
894 | int max_sg_entries = PRD_ENTRIES; | |
895 | ||
896 | /* | |
897 | * Our default set up assumes the normal IDE case, | |
898 | * that is 64K segmenting, standard PRD setup | |
899 | * and LBA28. Some drivers then impose their own | |
900 | * limits and LBA48 we could raise it but as yet | |
901 | * do not. | |
902 | */ | |
1946089a | 903 | |
556e58fe | 904 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
905 | if (!q) |
906 | return 1; | |
907 | ||
908 | q->queuedata = drive; | |
909 | blk_queue_segment_boundary(q, 0xffff); | |
910 | ||
1da177e4 LT |
911 | if (hwif->rqsize < max_sectors) |
912 | max_sectors = hwif->rqsize; | |
913 | blk_queue_max_sectors(q, max_sectors); | |
914 | ||
915 | #ifdef CONFIG_PCI | |
916 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
917 | * creates segments that don't completely match our boundary | |
918 | * requirements and thus need to be broken up again. Because it | |
919 | * doesn't align properly either, we may actually have to break up | |
920 | * to more segments than what was we got in the first place, a max | |
921 | * worst case is twice as many. | |
922 | * This will be fixed once we teach pci_map_sg() about our boundary | |
923 | * requirements, hopefully soon. *FIXME* | |
924 | */ | |
925 | if (!PCI_DMA_BUS_IS_PHYS) | |
926 | max_sg_entries >>= 1; | |
927 | #endif /* CONFIG_PCI */ | |
928 | ||
929 | blk_queue_max_hw_segments(q, max_sg_entries); | |
930 | blk_queue_max_phys_segments(q, max_sg_entries); | |
931 | ||
932 | /* assign drive queue */ | |
933 | drive->queue = q; | |
934 | ||
935 | /* needs drive->queue to be set */ | |
936 | ide_toggle_bounce(drive, 1); | |
937 | ||
1da177e4 LT |
938 | return 0; |
939 | } | |
940 | ||
0947e0dc BZ |
941 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
942 | { | |
943 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
944 | ||
945 | spin_lock_irq(&ide_lock); | |
946 | if (!hwgroup->drive) { | |
947 | /* first drive for hwgroup. */ | |
948 | drive->next = drive; | |
949 | hwgroup->drive = drive; | |
950 | hwgroup->hwif = HWIF(hwgroup->drive); | |
951 | } else { | |
952 | drive->next = hwgroup->drive->next; | |
953 | hwgroup->drive->next = drive; | |
954 | } | |
955 | spin_unlock_irq(&ide_lock); | |
956 | } | |
957 | ||
d5bc6592 BZ |
958 | /* |
959 | * For any present drive: | |
960 | * - allocate the block device queue | |
961 | * - link drive into the hwgroup | |
962 | */ | |
963 | static void ide_port_setup_devices(ide_hwif_t *hwif) | |
964 | { | |
965 | int i; | |
966 | ||
26042d05 | 967 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
968 | for (i = 0; i < MAX_DRIVES; i++) { |
969 | ide_drive_t *drive = &hwif->drives[i]; | |
970 | ||
971 | if (!drive->present) | |
972 | continue; | |
973 | ||
974 | if (ide_init_queue(drive)) { | |
975 | printk(KERN_ERR "ide: failed to init %s\n", | |
976 | drive->name); | |
977 | continue; | |
978 | } | |
979 | ||
980 | ide_add_drive_to_hwgroup(drive); | |
981 | } | |
26042d05 | 982 | mutex_unlock(&ide_cfg_mtx); |
d5bc6592 BZ |
983 | } |
984 | ||
af1cbba3 BZ |
985 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
986 | ||
6059143a BZ |
987 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
988 | { | |
989 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
990 | ||
af1cbba3 BZ |
991 | ide_ports[hwif->index] = NULL; |
992 | ||
6059143a BZ |
993 | spin_lock_irq(&ide_lock); |
994 | /* | |
995 | * Remove us from the hwgroup, and free | |
996 | * the hwgroup if we were the only member | |
997 | */ | |
998 | if (hwif->next == hwif) { | |
999 | BUG_ON(hwgroup->hwif != hwif); | |
1000 | kfree(hwgroup); | |
1001 | } else { | |
1002 | /* There is another interface in hwgroup. | |
1003 | * Unlink us, and set hwgroup->drive and ->hwif to | |
1004 | * something sane. | |
1005 | */ | |
1006 | ide_hwif_t *g = hwgroup->hwif; | |
1007 | ||
1008 | while (g->next != hwif) | |
1009 | g = g->next; | |
1010 | g->next = hwif->next; | |
1011 | if (hwgroup->hwif == hwif) { | |
1012 | /* Chose a random hwif for hwgroup->hwif. | |
1013 | * It's guaranteed that there are no drives | |
1014 | * left in the hwgroup. | |
1015 | */ | |
1016 | BUG_ON(hwgroup->drive != NULL); | |
1017 | hwgroup->hwif = g; | |
1018 | } | |
1019 | BUG_ON(hwgroup->hwif == hwif); | |
1020 | } | |
1021 | spin_unlock_irq(&ide_lock); | |
1022 | } | |
1023 | ||
1da177e4 LT |
1024 | /* |
1025 | * This routine sets up the irq for an ide interface, and creates a new | |
1026 | * hwgroup for the irq/hwif if none was previously assigned. | |
1027 | * | |
1028 | * Much of the code is for correctly detecting/handling irq sharing | |
1029 | * and irq serialization situations. This is somewhat complex because | |
1030 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1031 | */ |
1032 | static int init_irq (ide_hwif_t *hwif) | |
1033 | { | |
4c3032d8 | 1034 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1035 | unsigned int index; |
1036 | ide_hwgroup_t *hwgroup; | |
1037 | ide_hwif_t *match = NULL; | |
1038 | ||
1039 | ||
1040 | BUG_ON(in_interrupt()); | |
1041 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
1042 | BUG_ON(hwif == NULL); |
1043 | ||
ef29888e | 1044 | mutex_lock(&ide_cfg_mtx); |
1da177e4 LT |
1045 | hwif->hwgroup = NULL; |
1046 | #if MAX_HWIFS > 1 | |
1047 | /* | |
1048 | * Group up with any other hwifs that share our irq(s). | |
1049 | */ | |
1050 | for (index = 0; index < MAX_HWIFS; index++) { | |
af1cbba3 BZ |
1051 | ide_hwif_t *h = ide_ports[index]; |
1052 | ||
1053 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
1da177e4 LT |
1054 | if (hwif->irq == h->irq) { |
1055 | hwif->sharing_irq = h->sharing_irq = 1; | |
1056 | if (hwif->chipset != ide_pci || | |
1057 | h->chipset != ide_pci) { | |
1058 | save_match(hwif, h, &match); | |
1059 | } | |
1060 | } | |
1061 | if (hwif->serialized) { | |
1062 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1063 | save_match(hwif, h, &match); | |
1064 | } | |
1065 | if (h->serialized) { | |
1066 | if (h->mate && hwif->irq == h->mate->irq) | |
1067 | save_match(hwif, h, &match); | |
1068 | } | |
1069 | } | |
1070 | } | |
1071 | #endif /* MAX_HWIFS > 1 */ | |
1072 | /* | |
1073 | * If we are still without a hwgroup, then form a new one | |
1074 | */ | |
1075 | if (match) { | |
1076 | hwgroup = match->hwgroup; | |
1077 | hwif->hwgroup = hwgroup; | |
1078 | /* | |
1079 | * Link us into the hwgroup. | |
1080 | * This must be done early, do ensure that unexpected_intr | |
1081 | * can find the hwif and prevent irq storms. | |
1082 | * No drives are attached to the new hwif, choose_drive | |
1083 | * can't do anything stupid (yet). | |
1084 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1085 | * linked list, the first entry is the hwif that owns | |
1086 | * hwgroup->handler - do not change that. | |
1087 | */ | |
1088 | spin_lock_irq(&ide_lock); | |
1089 | hwif->next = hwgroup->hwif->next; | |
1090 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1091 | BUG_ON(hwif->next == hwif); |
1da177e4 LT |
1092 | spin_unlock_irq(&ide_lock); |
1093 | } else { | |
422278ef BZ |
1094 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1095 | hwif_to_node(hwif)); | |
1096 | if (hwgroup == NULL) | |
1097 | goto out_up; | |
1da177e4 LT |
1098 | |
1099 | hwif->hwgroup = hwgroup; | |
422278ef | 1100 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1101 | |
1da177e4 LT |
1102 | init_timer(&hwgroup->timer); |
1103 | hwgroup->timer.function = &ide_timer_expiry; | |
1104 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1105 | } | |
1106 | ||
af1cbba3 BZ |
1107 | ide_ports[hwif->index] = hwif; |
1108 | ||
1da177e4 LT |
1109 | /* |
1110 | * Allocate the irq, if not already obtained for another hwif | |
1111 | */ | |
1112 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1113 | int sa = 0; |
7b892806 | 1114 | #if defined(__mc68000__) |
362537b9 | 1115 | sa = IRQF_SHARED; |
e1771e20 | 1116 | #endif /* __mc68000__ */ |
1da177e4 | 1117 | |
7b5da4be | 1118 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) |
362537b9 | 1119 | sa = IRQF_SHARED; |
1da177e4 | 1120 | |
4c3032d8 | 1121 | if (io_ports->ctl_addr) |
374e042c | 1122 | hwif->tp_ops->set_irq(hwif, 1); |
1da177e4 LT |
1123 | |
1124 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1125 | goto out_unlink; | |
1126 | } | |
1127 | ||
8a0e7e14 BZ |
1128 | if (!hwif->rqsize) { |
1129 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1130 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1131 | hwif->rqsize = 256; | |
1132 | else | |
1133 | hwif->rqsize = 65536; | |
1134 | } | |
1135 | ||
7b892806 | 1136 | #if !defined(__mc68000__) |
1b8ebad8 | 1137 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1138 | io_ports->data_addr, io_ports->status_addr, |
1139 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1140 | #else |
1b8ebad8 | 1141 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1142 | io_ports->data_addr, hwif->irq); |
7b892806 | 1143 | #endif /* __mc68000__ */ |
1da177e4 | 1144 | if (match) |
1b8ebad8 | 1145 | printk(KERN_CONT " (%sed with %s)", |
1da177e4 | 1146 | hwif->sharing_irq ? "shar" : "serializ", match->name); |
1b8ebad8 | 1147 | printk(KERN_CONT "\n"); |
d5bc6592 | 1148 | |
ef29888e | 1149 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1150 | return 0; |
1151 | out_unlink: | |
fbd13088 | 1152 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1153 | out_up: |
ef29888e | 1154 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1155 | return 1; |
1156 | } | |
1157 | ||
1158 | static int ata_lock(dev_t dev, void *data) | |
1159 | { | |
1160 | /* FIXME: we want to pin hwif down */ | |
1161 | return 0; | |
1162 | } | |
1163 | ||
1164 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1165 | { | |
1166 | ide_hwif_t *hwif = data; | |
1167 | int unit = *part >> PARTN_BITS; | |
1168 | ide_drive_t *drive = &hwif->drives[unit]; | |
1169 | if (!drive->present) | |
1170 | return NULL; | |
1171 | ||
1172 | if (drive->media == ide_disk) | |
1173 | request_module("ide-disk"); | |
1174 | if (drive->scsi) | |
1175 | request_module("ide-scsi"); | |
1176 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1177 | request_module("ide-cd"); | |
1178 | if (drive->media == ide_tape) | |
1179 | request_module("ide-tape"); | |
1180 | if (drive->media == ide_floppy) | |
1181 | request_module("ide-floppy"); | |
1182 | ||
1183 | return NULL; | |
1184 | } | |
1185 | ||
1186 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1187 | { | |
1188 | struct gendisk *p = data; | |
1189 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1190 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | static int exact_lock(dev_t dev, void *data) | |
1194 | { | |
1195 | struct gendisk *p = data; | |
1196 | ||
1197 | if (!get_disk(p)) | |
1198 | return -1; | |
1199 | return 0; | |
1200 | } | |
1201 | ||
1202 | void ide_register_region(struct gendisk *disk) | |
1203 | { | |
1204 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1205 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1206 | } | |
1207 | ||
1208 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1209 | ||
1210 | void ide_unregister_region(struct gendisk *disk) | |
1211 | { | |
1212 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1213 | disk->minors); | |
1214 | } | |
1215 | ||
1216 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1217 | ||
1218 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1219 | { | |
1220 | ide_hwif_t *hwif = drive->hwif; | |
1221 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1222 | ||
1223 | disk->major = hwif->major; | |
1224 | disk->first_minor = unit << PARTN_BITS; | |
1225 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1226 | disk->queue = drive->queue; | |
1227 | } | |
1228 | ||
1229 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1230 | ||
8604affd BZ |
1231 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1232 | { | |
1233 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1234 | ||
1235 | if (drive == drive->next) { | |
1236 | /* special case: last drive from hwgroup. */ | |
1237 | BUG_ON(hwgroup->drive != drive); | |
1238 | hwgroup->drive = NULL; | |
1239 | } else { | |
1240 | ide_drive_t *walk; | |
1241 | ||
1242 | walk = hwgroup->drive; | |
1243 | while (walk->next != drive) | |
1244 | walk = walk->next; | |
1245 | walk->next = drive->next; | |
1246 | if (hwgroup->drive == drive) { | |
1247 | hwgroup->drive = drive->next; | |
1248 | hwgroup->hwif = hwgroup->drive->hwif; | |
1249 | } | |
1250 | } | |
1251 | BUG_ON(hwgroup->drive == drive); | |
1252 | } | |
1253 | ||
1da177e4 LT |
1254 | static void drive_release_dev (struct device *dev) |
1255 | { | |
1256 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1257 | ||
5b0c4b30 BZ |
1258 | ide_proc_unregister_device(drive); |
1259 | ||
8604affd | 1260 | spin_lock_irq(&ide_lock); |
8604affd | 1261 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1262 | kfree(drive->id); |
1263 | drive->id = NULL; | |
8604affd BZ |
1264 | drive->present = 0; |
1265 | /* Messed up locking ... */ | |
1266 | spin_unlock_irq(&ide_lock); | |
1267 | blk_cleanup_queue(drive->queue); | |
1268 | spin_lock_irq(&ide_lock); | |
1269 | drive->queue = NULL; | |
1270 | spin_unlock_irq(&ide_lock); | |
1271 | ||
f36d4024 | 1272 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1273 | } |
1274 | ||
1da177e4 LT |
1275 | static int hwif_init(ide_hwif_t *hwif) |
1276 | { | |
1277 | int old_irq; | |
1278 | ||
1da177e4 | 1279 | if (!hwif->irq) { |
a861beb1 | 1280 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1281 | if (!hwif->irq) { |
1b8ebad8 | 1282 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1283 | return 0; |
1da177e4 LT |
1284 | } |
1285 | } | |
1da177e4 | 1286 | |
1da177e4 LT |
1287 | if (register_blkdev(hwif->major, hwif->name)) |
1288 | return 0; | |
1289 | ||
1290 | if (!hwif->sg_max_nents) | |
1291 | hwif->sg_max_nents = PRD_ENTRIES; | |
1292 | ||
45711f1a | 1293 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1294 | GFP_KERNEL); |
1295 | if (!hwif->sg_table) { | |
1296 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1297 | goto out; | |
1298 | } | |
45711f1a JA |
1299 | |
1300 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1301 | |
1302 | if (init_irq(hwif) == 0) | |
1303 | goto done; | |
1304 | ||
1305 | old_irq = hwif->irq; | |
1306 | /* | |
1307 | * It failed to initialise. Find the default IRQ for | |
1308 | * this port and try that. | |
1309 | */ | |
a861beb1 | 1310 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1311 | if (!hwif->irq) { |
1b8ebad8 | 1312 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1313 | hwif->name, old_irq); |
1314 | goto out; | |
1315 | } | |
1316 | if (init_irq(hwif)) { | |
1b8ebad8 | 1317 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1318 | hwif->name, old_irq, hwif->irq); |
1319 | goto out; | |
1320 | } | |
1b8ebad8 | 1321 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1322 | hwif->name, hwif->irq); |
1323 | ||
1324 | done: | |
3a4e7c96 BZ |
1325 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1326 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1327 | return 1; |
1328 | ||
1329 | out: | |
1330 | unregister_blkdev(hwif->major, hwif->name); | |
1331 | return 0; | |
1332 | } | |
1333 | ||
9601a607 BZ |
1334 | static void hwif_register_devices(ide_hwif_t *hwif) |
1335 | { | |
1336 | unsigned int i; | |
1337 | ||
1338 | for (i = 0; i < MAX_DRIVES; i++) { | |
1339 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1340 | struct device *dev = &drive->gendev; |
1341 | int ret; | |
9601a607 | 1342 | |
c5d70cc7 BZ |
1343 | if (!drive->present) |
1344 | continue; | |
9601a607 | 1345 | |
c5d70cc7 BZ |
1346 | ide_add_generic_settings(drive); |
1347 | ||
1348 | snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); | |
1349 | dev->parent = &hwif->gendev; | |
1350 | dev->bus = &ide_bus_type; | |
1351 | dev->driver_data = drive; | |
1352 | dev->release = drive_release_dev; | |
1353 | ||
1354 | ret = device_register(dev); | |
1355 | if (ret < 0) | |
1356 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1357 | "%d\n", __func__, ret); | |
9601a607 BZ |
1358 | } |
1359 | } | |
1360 | ||
7704ca2a BZ |
1361 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1362 | { | |
ac95beed | 1363 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1364 | int i; |
1365 | ||
1366 | for (i = 0; i < MAX_DRIVES; i++) { | |
1367 | ide_drive_t *drive = &hwif->drives[i]; | |
1368 | ||
1369 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) | |
1370 | drive->io_32bit = 1; | |
1371 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
1372 | drive->unmask = 1; | |
807b90d0 BZ |
1373 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
1374 | drive->no_unmask = 1; | |
1f2cf8b0 | 1375 | |
e6d95bd1 BZ |
1376 | if (port_ops && port_ops->init_dev) |
1377 | port_ops->init_dev(drive); | |
1378 | } | |
7704ca2a BZ |
1379 | } |
1380 | ||
c413b9b9 BZ |
1381 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1382 | const struct ide_port_info *d) | |
8447d9d5 | 1383 | { |
b7691646 | 1384 | hwif->channel = port; |
c413b9b9 BZ |
1385 | |
1386 | if (d->chipset) | |
1387 | hwif->chipset = d->chipset; | |
1388 | ||
1389 | if (d->init_iops) | |
1390 | d->init_iops(hwif); | |
1391 | ||
c413b9b9 BZ |
1392 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1393 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1394 | hwif->irq = port ? 15 : 14; | |
1395 | ||
23f8e4bf BZ |
1396 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1397 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1398 | hwif->pio_mask = d->pio_mask; |
1399 | ||
374e042c BZ |
1400 | if (d->tp_ops) |
1401 | hwif->tp_ops = d->tp_ops; | |
1402 | ||
ac95beed BZ |
1403 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1404 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1405 | hwif->port_ops = d->port_ops; | |
1406 | ||
c413b9b9 BZ |
1407 | hwif->swdma_mask = d->swdma_mask; |
1408 | hwif->mwdma_mask = d->mwdma_mask; | |
1409 | hwif->ultra_mask = d->udma_mask; | |
1410 | ||
b123f56e BZ |
1411 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1412 | int rc; | |
1413 | ||
1414 | if (d->init_dma) | |
1415 | rc = d->init_dma(hwif, d); | |
1416 | else | |
1417 | rc = ide_hwif_setup_dma(hwif, d); | |
1418 | ||
1419 | if (rc < 0) { | |
1420 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1421 | hwif->dma_base = 0; |
b123f56e BZ |
1422 | hwif->swdma_mask = 0; |
1423 | hwif->mwdma_mask = 0; | |
1424 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1425 | } else if (d->dma_ops) |
1426 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1427 | } |
c413b9b9 | 1428 | |
1024c5f4 BZ |
1429 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
1430 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { | |
1431 | if (hwif->mate) | |
1432 | hwif->mate->serialized = hwif->serialized = 1; | |
1433 | } | |
1434 | ||
c413b9b9 BZ |
1435 | if (d->host_flags & IDE_HFLAG_RQSIZE_256) |
1436 | hwif->rqsize = 256; | |
1437 | ||
1438 | /* call chipset specific routine for each enabled port */ | |
1439 | if (d->init_hwif) | |
1440 | d->init_hwif(hwif); | |
c7f6f21a | 1441 | } |
bfa14b42 | 1442 | |
c7f6f21a BZ |
1443 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1444 | { | |
ac95beed BZ |
1445 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1446 | ||
1447 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1448 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1449 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1450 | } |
c413b9b9 BZ |
1451 | } |
1452 | ||
f74c9141 BZ |
1453 | static ssize_t store_delete_devices(struct device *portdev, |
1454 | struct device_attribute *attr, | |
1455 | const char *buf, size_t n) | |
1456 | { | |
1457 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1458 | ||
1459 | if (strncmp(buf, "1", n)) | |
1460 | return -EINVAL; | |
1461 | ||
1462 | ide_port_unregister_devices(hwif); | |
1463 | ||
1464 | return n; | |
1465 | }; | |
1466 | ||
1467 | static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); | |
1468 | ||
1469 | static ssize_t store_scan(struct device *portdev, | |
1470 | struct device_attribute *attr, | |
1471 | const char *buf, size_t n) | |
1472 | { | |
1473 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1474 | ||
1475 | if (strncmp(buf, "1", n)) | |
1476 | return -EINVAL; | |
1477 | ||
1478 | ide_port_unregister_devices(hwif); | |
1479 | ide_port_scan(hwif); | |
1480 | ||
1481 | return n; | |
1482 | }; | |
1483 | ||
1484 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
1485 | ||
1486 | static struct device_attribute *ide_port_attrs[] = { | |
1487 | &dev_attr_delete_devices, | |
1488 | &dev_attr_scan, | |
1489 | NULL | |
1490 | }; | |
1491 | ||
1492 | static int ide_sysfs_register_port(ide_hwif_t *hwif) | |
1493 | { | |
ca09a237 | 1494 | int i, uninitialized_var(rc); |
f74c9141 BZ |
1495 | |
1496 | for (i = 0; ide_port_attrs[i]; i++) { | |
1497 | rc = device_create_file(hwif->portdev, ide_port_attrs[i]); | |
1498 | if (rc) | |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | return rc; | |
1503 | } | |
1504 | ||
8cdf3100 BZ |
1505 | static unsigned int ide_indexes; |
1506 | ||
fe80b937 | 1507 | /** |
8cdf3100 | 1508 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1509 | * @d: IDE port info |
1510 | * | |
8cdf3100 | 1511 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1512 | */ |
1513 | ||
8cdf3100 | 1514 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1515 | { |
8cdf3100 | 1516 | int idx = -ENOENT; |
fe80b937 | 1517 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1518 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1519 | |
1520 | /* | |
1521 | * Claim an unassigned slot. | |
1522 | * | |
1523 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1524 | * just in case there's another interface yet-to-be-scanned | |
1525 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1526 | * | |
1527 | * Unless there is a bootable card that does not use the standard | |
1528 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1529 | */ | |
8cdf3100 BZ |
1530 | mutex_lock(&ide_cfg_mtx); |
1531 | if (MAX_HWIFS == 1) { | |
1532 | if (ide_indexes == 0 && i == 0) | |
1533 | idx = 1; | |
fe80b937 | 1534 | } else { |
8cdf3100 BZ |
1535 | if (bootable) { |
1536 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1537 | idx = ffz(ide_indexes | i); | |
1538 | } else { | |
1539 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) | |
1540 | idx = ffz(ide_indexes | 3); | |
1541 | else if ((ide_indexes & 3) != 3) | |
1542 | idx = ffz(ide_indexes); | |
fe80b937 BZ |
1543 | } |
1544 | } | |
8cdf3100 BZ |
1545 | if (idx >= 0) |
1546 | ide_indexes |= (1 << idx); | |
1547 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1548 | |
8cdf3100 BZ |
1549 | return idx; |
1550 | } | |
256c5f8e | 1551 | |
8cdf3100 BZ |
1552 | static void ide_free_port_slot(int idx) |
1553 | { | |
1554 | mutex_lock(&ide_cfg_mtx); | |
1555 | ide_indexes &= ~(1 << idx); | |
1556 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1557 | } |
fe80b937 | 1558 | |
48c3c107 BZ |
1559 | struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, |
1560 | hw_regs_t **hws) | |
1561 | { | |
1562 | struct ide_host *host; | |
1563 | int i; | |
1564 | ||
1565 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1566 | if (host == NULL) | |
1567 | return NULL; | |
1568 | ||
1569 | for (i = 0; i < MAX_HWIFS; i++) { | |
1570 | ide_hwif_t *hwif; | |
8cdf3100 | 1571 | int idx; |
48c3c107 BZ |
1572 | |
1573 | if (hws[i] == NULL) | |
1574 | continue; | |
1575 | ||
18de1017 BZ |
1576 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1577 | if (hwif == NULL) | |
1578 | continue; | |
1579 | ||
8cdf3100 BZ |
1580 | idx = ide_find_port_slot(d); |
1581 | if (idx < 0) { | |
1582 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1583 | d ? d->name : "ide"); | |
18de1017 | 1584 | kfree(hwif); |
8cdf3100 | 1585 | continue; |
48c3c107 | 1586 | } |
8cdf3100 | 1587 | |
8cdf3100 BZ |
1588 | ide_init_port_data(hwif, idx); |
1589 | ||
08da591e BZ |
1590 | hwif->host = host; |
1591 | ||
8cdf3100 BZ |
1592 | host->ports[i] = hwif; |
1593 | host->n_ports++; | |
48c3c107 BZ |
1594 | } |
1595 | ||
1596 | if (host->n_ports == 0) { | |
1597 | kfree(host); | |
1598 | return NULL; | |
1599 | } | |
1600 | ||
6cdf6eb3 BZ |
1601 | if (hws[0]) |
1602 | host->dev[0] = hws[0]->dev; | |
1603 | ||
ef0b0427 BZ |
1604 | if (d) |
1605 | host->host_flags = d->host_flags; | |
1606 | ||
48c3c107 BZ |
1607 | return host; |
1608 | } | |
1609 | EXPORT_SYMBOL_GPL(ide_host_alloc_all); | |
1610 | ||
1611 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) | |
1612 | { | |
1613 | hw_regs_t *hws_all[MAX_HWIFS]; | |
1614 | int i; | |
1615 | ||
1616 | for (i = 0; i < MAX_HWIFS; i++) | |
1617 | hws_all[i] = (i < 4) ? hws[i] : NULL; | |
1618 | ||
1619 | return ide_host_alloc_all(d, hws_all); | |
1620 | } | |
1621 | EXPORT_SYMBOL_GPL(ide_host_alloc); | |
1622 | ||
1623 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1624 | hw_regs_t **hws) | |
c413b9b9 BZ |
1625 | { |
1626 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1627 | int i, j = 0; |
8447d9d5 | 1628 | |
c413b9b9 | 1629 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1630 | hwif = host->ports[i]; |
48c3c107 | 1631 | |
e0d00207 | 1632 | if (hwif == NULL) { |
c413b9b9 BZ |
1633 | mate = NULL; |
1634 | continue; | |
1635 | } | |
1636 | ||
c97c6aca | 1637 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1638 | ide_port_apply_params(hwif); |
1639 | ||
1640 | if (d == NULL) { | |
1641 | mate = NULL; | |
1642 | continue; | |
1643 | } | |
1644 | ||
b7691646 | 1645 | if ((i & 1) && mate) { |
c413b9b9 BZ |
1646 | hwif->mate = mate; |
1647 | mate->mate = hwif; | |
1648 | } | |
1649 | ||
1650 | mate = (i & 1) ? NULL : hwif; | |
1651 | ||
1652 | ide_init_port(hwif, i & 1, d); | |
c7f6f21a | 1653 | ide_port_cable_detect(hwif); |
7704ca2a | 1654 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1655 | } |
1656 | ||
151575e4 | 1657 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1658 | hwif = host->ports[i]; |
ba6560aa | 1659 | |
e0d00207 BZ |
1660 | if (hwif == NULL) |
1661 | continue; | |
139ddfca | 1662 | |
eb716beb BZ |
1663 | if (ide_probe_port(hwif) == 0) |
1664 | hwif->present = 1; | |
a14dc574 BZ |
1665 | |
1666 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1667 | !hwif->mate->present) | |
1668 | ide_register_port(hwif); | |
1669 | ||
eb716beb BZ |
1670 | if (hwif->present) |
1671 | ide_port_tune_devices(hwif); | |
2e13093a | 1672 | } |
ba6560aa | 1673 | |
151575e4 | 1674 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1675 | hwif = host->ports[i]; |
2e13093a | 1676 | |
e0d00207 BZ |
1677 | if (hwif == NULL) |
1678 | continue; | |
ba6560aa BZ |
1679 | |
1680 | if (hwif_init(hwif) == 0) { | |
1681 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1682 | "interface\n", hwif->name); | |
48535651 | 1683 | hwif->present = 0; |
ba6560aa BZ |
1684 | continue; |
1685 | } | |
decdc3f0 | 1686 | |
e0d00207 BZ |
1687 | j++; |
1688 | ||
eb716beb BZ |
1689 | if (hwif->present) |
1690 | ide_port_setup_devices(hwif); | |
26042d05 | 1691 | |
decdc3f0 | 1692 | ide_acpi_init(hwif); |
eb716beb BZ |
1693 | |
1694 | if (hwif->present) | |
1695 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1696 | } |
1697 | ||
151575e4 | 1698 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1699 | hwif = host->ports[i]; |
2e13093a | 1700 | |
e0d00207 BZ |
1701 | if (hwif == NULL) |
1702 | continue; | |
ba6560aa | 1703 | |
eb716beb BZ |
1704 | if (hwif->chipset == ide_unknown) |
1705 | hwif->chipset = ide_generic; | |
1706 | ||
1707 | if (hwif->present) | |
ba6560aa | 1708 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1709 | } |
1710 | ||
151575e4 | 1711 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1712 | hwif = host->ports[i]; |
327617e1 | 1713 | |
e0d00207 BZ |
1714 | if (hwif == NULL) |
1715 | continue; | |
327617e1 | 1716 | |
eb716beb BZ |
1717 | ide_sysfs_register_port(hwif); |
1718 | ide_proc_register_port(hwif); | |
1719 | ||
1720 | if (hwif->present) | |
d9270a3f | 1721 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1722 | } |
1723 | ||
e0d00207 | 1724 | return j ? 0 : -1; |
8447d9d5 | 1725 | } |
48c3c107 | 1726 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1727 | |
6f904d01 BZ |
1728 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1729 | struct ide_host **hostp) | |
1730 | { | |
1731 | struct ide_host *host; | |
8a69580e | 1732 | int rc; |
6f904d01 BZ |
1733 | |
1734 | host = ide_host_alloc(d, hws); | |
1735 | if (host == NULL) | |
1736 | return -ENOMEM; | |
1737 | ||
8a69580e BZ |
1738 | rc = ide_host_register(host, d, hws); |
1739 | if (rc) { | |
1740 | ide_host_free(host); | |
1741 | return rc; | |
1742 | } | |
6f904d01 BZ |
1743 | |
1744 | if (hostp) | |
1745 | *hostp = host; | |
1746 | ||
1747 | return 0; | |
1748 | } | |
1749 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1750 | ||
8a69580e | 1751 | void ide_host_free(struct ide_host *host) |
151575e4 | 1752 | { |
8cdf3100 | 1753 | ide_hwif_t *hwif; |
151575e4 | 1754 | int i; |
8447d9d5 | 1755 | |
c97c6aca | 1756 | for (i = 0; i < MAX_HWIFS; i++) { |
8cdf3100 BZ |
1757 | hwif = host->ports[i]; |
1758 | ||
1759 | if (hwif == NULL) | |
1760 | continue; | |
1761 | ||
8cdf3100 | 1762 | ide_free_port_slot(hwif->index); |
18de1017 | 1763 | kfree(hwif); |
c97c6aca | 1764 | } |
151575e4 | 1765 | |
48c3c107 | 1766 | kfree(host); |
151575e4 | 1767 | } |
8a69580e BZ |
1768 | EXPORT_SYMBOL_GPL(ide_host_free); |
1769 | ||
1770 | void ide_host_remove(struct ide_host *host) | |
1771 | { | |
1772 | int i; | |
1773 | ||
1774 | for (i = 0; i < MAX_HWIFS; i++) { | |
1775 | if (host->ports[i]) | |
1776 | ide_unregister(host->ports[i]); | |
1777 | } | |
1778 | ||
1779 | ide_host_free(host); | |
1780 | } | |
48c3c107 | 1781 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1782 | |
1783 | void ide_port_scan(ide_hwif_t *hwif) | |
1784 | { | |
9fd91d95 | 1785 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1786 | ide_port_cable_detect(hwif); |
1787 | ide_port_init_devices(hwif); | |
1788 | ||
1789 | if (ide_probe_port(hwif) < 0) | |
1790 | return; | |
1791 | ||
1792 | hwif->present = 1; | |
1793 | ||
1794 | ide_port_tune_devices(hwif); | |
1795 | ide_acpi_port_init_devices(hwif); | |
1796 | ide_port_setup_devices(hwif); | |
1797 | hwif_register_devices(hwif); | |
1798 | ide_proc_port_register_devices(hwif); | |
1799 | } | |
1800 | EXPORT_SYMBOL_GPL(ide_port_scan); | |
3b36f66b | 1801 | |
48c3c107 | 1802 | static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, |
c97c6aca | 1803 | u8 port_no, const struct ide_port_info *d, |
d9b819a0 | 1804 | unsigned long config) |
3b36f66b | 1805 | { |
d9b819a0 BZ |
1806 | unsigned long base, ctl; |
1807 | int irq; | |
3b36f66b | 1808 | |
d9b819a0 BZ |
1809 | if (port_no == 0) { |
1810 | base = 0x1f0; | |
1811 | ctl = 0x3f6; | |
1812 | irq = 14; | |
1813 | } else { | |
1814 | base = 0x170; | |
1815 | ctl = 0x376; | |
1816 | irq = 15; | |
1817 | } | |
3b36f66b | 1818 | |
d92f1a28 BZ |
1819 | if (!request_region(base, 8, d->name)) { |
1820 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
1821 | d->name, base, base + 7); | |
1822 | return; | |
1823 | } | |
1824 | ||
1825 | if (!request_region(ctl, 1, d->name)) { | |
1826 | printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", | |
1827 | d->name, ctl); | |
1828 | release_region(base, 8); | |
1829 | return; | |
1830 | } | |
1831 | ||
d9b819a0 BZ |
1832 | ide_std_init_ports(hw, base, ctl); |
1833 | hw->irq = irq; | |
d427e836 | 1834 | hw->chipset = d->chipset; |
d6276b5f | 1835 | hw->config = config; |
3b36f66b | 1836 | |
48c3c107 | 1837 | hws[port_no] = hw; |
d9b819a0 | 1838 | } |
3b36f66b | 1839 | |
d9b819a0 BZ |
1840 | int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) |
1841 | { | |
c97c6aca | 1842 | hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; |
0bfeee7d | 1843 | |
d9b819a0 BZ |
1844 | memset(&hw, 0, sizeof(hw)); |
1845 | ||
1846 | if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) | |
48c3c107 BZ |
1847 | ide_legacy_init_one(hws, &hw[0], 0, d, config); |
1848 | ide_legacy_init_one(hws, &hw[1], 1, d, config); | |
d9b819a0 | 1849 | |
48c3c107 | 1850 | if (hws[0] == NULL && hws[1] == NULL && |
d9b819a0 BZ |
1851 | (d->host_flags & IDE_HFLAG_SINGLE)) |
1852 | return -ENOENT; | |
3b36f66b | 1853 | |
6f904d01 | 1854 | return ide_host_add(d, hws, NULL); |
3b36f66b BZ |
1855 | } |
1856 | EXPORT_SYMBOL_GPL(ide_legacy_device_add); |