Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
59bca8cc BZ |
2 | * Copyright (C) 1994-1998 Linus Torvalds & authors (see below) |
3 | * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz | |
1da177e4 LT |
4 | */ |
5 | ||
6 | /* | |
7 | * Mostly written by Mark Lord <mlord@pobox.com> | |
8 | * and Gadi Oxman <gadio@netvision.net.il> | |
9 | * and Andre Hedrick <andre@linux-ide.org> | |
10 | * | |
11 | * See linux/MAINTAINERS for address of current maintainer. | |
12 | * | |
13 | * This is the IDE probe module, as evolved from hd.c and ide.c. | |
14 | * | |
bbe4d6d8 BZ |
15 | * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot |
16 | * by Andrea Arcangeli | |
1da177e4 LT |
17 | */ |
18 | ||
1da177e4 LT |
19 | #include <linux/module.h> |
20 | #include <linux/types.h> | |
21 | #include <linux/string.h> | |
22 | #include <linux/kernel.h> | |
23 | #include <linux/timer.h> | |
24 | #include <linux/mm.h> | |
25 | #include <linux/interrupt.h> | |
26 | #include <linux/major.h> | |
27 | #include <linux/errno.h> | |
28 | #include <linux/genhd.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/delay.h> | |
31 | #include <linux/ide.h> | |
32 | #include <linux/spinlock.h> | |
33 | #include <linux/kmod.h> | |
34 | #include <linux/pci.h> | |
dc81785d | 35 | #include <linux/scatterlist.h> |
1da177e4 LT |
36 | |
37 | #include <asm/byteorder.h> | |
38 | #include <asm/irq.h> | |
39 | #include <asm/uaccess.h> | |
40 | #include <asm/io.h> | |
41 | ||
42 | /** | |
43 | * generic_id - add a generic drive id | |
44 | * @drive: drive to make an ID block for | |
45 | * | |
46 | * Add a fake id field to the drive we are passed. This allows | |
47 | * use to skip a ton of NULL checks (which people always miss) | |
48 | * and make drive properties unconditional outside of this file | |
49 | */ | |
50 | ||
51 | static void generic_id(ide_drive_t *drive) | |
52 | { | |
4dde4492 BZ |
53 | u16 *id = drive->id; |
54 | ||
55 | id[ATA_ID_CUR_CYLS] = id[ATA_ID_CYLS] = drive->cyl; | |
56 | id[ATA_ID_CUR_HEADS] = id[ATA_ID_HEADS] = drive->head; | |
57 | id[ATA_ID_CUR_SECTORS] = id[ATA_ID_SECTORS] = drive->sect; | |
1da177e4 LT |
58 | } |
59 | ||
60 | static void ide_disk_init_chs(ide_drive_t *drive) | |
61 | { | |
4dde4492 | 62 | u16 *id = drive->id; |
1da177e4 LT |
63 | |
64 | /* Extract geometry if we did not already have one for the drive */ | |
65 | if (!drive->cyl || !drive->head || !drive->sect) { | |
4dde4492 BZ |
66 | drive->cyl = drive->bios_cyl = id[ATA_ID_CYLS]; |
67 | drive->head = drive->bios_head = id[ATA_ID_HEADS]; | |
68 | drive->sect = drive->bios_sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
69 | } |
70 | ||
71 | /* Handle logical geometry translation by the drive */ | |
dd8f46f6 | 72 | if (ata_id_current_chs_valid(id)) { |
4dde4492 BZ |
73 | drive->cyl = id[ATA_ID_CUR_CYLS]; |
74 | drive->head = id[ATA_ID_CUR_HEADS]; | |
75 | drive->sect = id[ATA_ID_CUR_SECTORS]; | |
1da177e4 LT |
76 | } |
77 | ||
78 | /* Use physical geometry if what we have still makes no sense */ | |
4dde4492 BZ |
79 | if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
80 | drive->cyl = id[ATA_ID_CYLS]; | |
81 | drive->head = id[ATA_ID_HEADS]; | |
82 | drive->sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
83 | } |
84 | } | |
85 | ||
86 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
87 | { | |
48fb2688 BZ |
88 | u16 *id = drive->id; |
89 | u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; | |
1da177e4 | 90 | |
48fb2688 | 91 | if (max_multsect) { |
1da177e4 | 92 | #ifdef CONFIG_IDEDISK_MULTI_MODE |
48fb2688 BZ |
93 | if ((max_multsect / 2) > 1) |
94 | id[ATA_ID_MULTSECT] = max_multsect | 0x100; | |
95 | else | |
96 | id[ATA_ID_MULTSECT] &= ~0x1ff; | |
97 | ||
98 | drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; | |
1da177e4 | 99 | #endif |
48fb2688 BZ |
100 | if ((id[ATA_ID_MULTSECT] & 0x100) && |
101 | (id[ATA_ID_MULTSECT] & 0xff)) | |
df1f8378 | 102 | drive->special.b.set_multmode = 1; |
1da177e4 LT |
103 | } |
104 | } | |
105 | ||
1da177e4 LT |
106 | /** |
107 | * do_identify - identify a drive | |
108 | * @drive: drive to identify | |
109 | * @cmd: command used | |
110 | * | |
111 | * Called when we have issued a drive identify command to | |
112 | * read and parse the results. This function is run with | |
113 | * interrupts disabled. | |
114 | */ | |
115 | ||
116 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
117 | { | |
118 | ide_hwif_t *hwif = HWIF(drive); | |
4dde4492 BZ |
119 | u16 *id = drive->id; |
120 | char *m = (char *)&id[ATA_ID_PROD]; | |
1da177e4 | 121 | int bswap = 1; |
1da177e4 | 122 | |
1da177e4 | 123 | /* read 512 bytes of id info */ |
374e042c | 124 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
1da177e4 LT |
125 | |
126 | drive->id_read = 1; | |
127 | local_irq_enable(); | |
7b9f25b5 BZ |
128 | #ifdef DEBUG |
129 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
130 | ide_dump_identify((u8 *)id); | |
131 | #endif | |
1da177e4 LT |
132 | ide_fix_driveid(id); |
133 | ||
1da177e4 | 134 | /* |
aaaade3f BZ |
135 | * ATA_CMD_ID_ATA returns little-endian info, |
136 | * ATA_CMD_ID_ATAPI *usually* returns little-endian info. | |
1da177e4 | 137 | */ |
aaaade3f | 138 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 BZ |
139 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
140 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
141 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 142 | /* Vertos drives may still be weird */ |
4dde4492 | 143 | bswap ^= 1; |
1da177e4 | 144 | } |
4dde4492 BZ |
145 | |
146 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
147 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
148 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 149 | |
699b052a | 150 | /* we depend on this a lot! */ |
4dde4492 | 151 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 152 | |
4dde4492 | 153 | if (strstr(m, "E X A B Y T E N E S T")) |
1da177e4 LT |
154 | goto err_misc; |
155 | ||
4dde4492 | 156 | printk(KERN_INFO "%s: %s, ", drive->name, m); |
1b8ebad8 | 157 | |
1da177e4 LT |
158 | drive->present = 1; |
159 | drive->dead = 0; | |
160 | ||
161 | /* | |
162 | * Check for an ATAPI device | |
163 | */ | |
aaaade3f | 164 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 | 165 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
1b8ebad8 BZ |
166 | |
167 | printk(KERN_CONT "ATAPI "); | |
1da177e4 LT |
168 | switch (type) { |
169 | case ide_floppy: | |
4dde4492 BZ |
170 | if (!strstr(m, "CD-ROM")) { |
171 | if (!strstr(m, "oppy") && | |
172 | !strstr(m, "poyp") && | |
173 | !strstr(m, "ZIP")) | |
1b8ebad8 | 174 | printk(KERN_CONT "cdrom or floppy?, assuming "); |
1da177e4 | 175 | if (drive->media != ide_cdrom) { |
1b8ebad8 | 176 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
177 | drive->removable = 1; |
178 | break; | |
179 | } | |
180 | } | |
181 | /* Early cdrom models used zero */ | |
182 | type = ide_cdrom; | |
183 | case ide_cdrom: | |
184 | drive->removable = 1; | |
185 | #ifdef CONFIG_PPC | |
186 | /* kludge for Apple PowerBook internal zip */ | |
4dde4492 | 187 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
1b8ebad8 | 188 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
189 | type = ide_floppy; |
190 | break; | |
191 | } | |
192 | #endif | |
1b8ebad8 | 193 | printk(KERN_CONT "CD/DVD-ROM"); |
1da177e4 LT |
194 | break; |
195 | case ide_tape: | |
1b8ebad8 | 196 | printk(KERN_CONT "TAPE"); |
1da177e4 LT |
197 | break; |
198 | case ide_optical: | |
1b8ebad8 | 199 | printk(KERN_CONT "OPTICAL"); |
1da177e4 LT |
200 | drive->removable = 1; |
201 | break; | |
202 | default: | |
1b8ebad8 | 203 | printk(KERN_CONT "UNKNOWN (type %d)", type); |
1da177e4 LT |
204 | break; |
205 | } | |
1b8ebad8 | 206 | printk(KERN_CONT " drive\n"); |
1da177e4 LT |
207 | drive->media = type; |
208 | /* an ATAPI device ignores DRDY */ | |
209 | drive->ready_stat = 0; | |
210 | return; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Not an ATAPI device: looks like a "regular" hard disk | |
215 | */ | |
98109337 RP |
216 | |
217 | /* | |
218 | * 0x848a = CompactFlash device | |
219 | * These are *not* removable in Linux definition of the term | |
220 | */ | |
4dde4492 | 221 | if (id[ATA_ID_CONFIG] != 0x848a && (id[ATA_ID_CONFIG] & (1 << 7))) |
1da177e4 LT |
222 | drive->removable = 1; |
223 | ||
1da177e4 | 224 | drive->media = ide_disk; |
1b8ebad8 BZ |
225 | |
226 | printk(KERN_CONT "%s DISK drive\n", | |
4dde4492 | 227 | (id[ATA_ID_CONFIG] == 0x848a) ? "CFA" : "ATA"); |
cd3dbc99 | 228 | |
1da177e4 LT |
229 | return; |
230 | ||
231 | err_misc: | |
232 | kfree(id); | |
233 | drive->present = 0; | |
234 | return; | |
235 | } | |
236 | ||
237 | /** | |
238 | * actual_try_to_identify - send ata/atapi identify | |
239 | * @drive: drive to identify | |
240 | * @cmd: command to use | |
241 | * | |
242 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
243 | * and waits for a response. It also monitors irqs while this is | |
244 | * happening, in hope of automatically determining which one is | |
245 | * being used by the interface. | |
246 | * | |
247 | * Returns: 0 device was identified | |
248 | * 1 device timed-out (no response to identify request) | |
249 | * 2 device aborted the command (refused to identify itself) | |
250 | */ | |
251 | ||
252 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
253 | { | |
254 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 255 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 256 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 257 | int use_altstatus = 0, rc; |
1da177e4 LT |
258 | unsigned long timeout; |
259 | u8 s = 0, a = 0; | |
260 | ||
261 | /* take a deep breath */ | |
262 | msleep(50); | |
263 | ||
4c3032d8 | 264 | if (io_ports->ctl_addr) { |
374e042c BZ |
265 | a = tp_ops->read_altstatus(hwif); |
266 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 267 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 268 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
269 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
270 | "instead of ALTSTATUS(0x%02x)\n", | |
271 | drive->name, s, a); | |
272 | else | |
1da177e4 | 273 | /* use non-intrusive polling */ |
c47137a9 BZ |
274 | use_altstatus = 1; |
275 | } | |
1da177e4 LT |
276 | |
277 | /* set features register for atapi | |
278 | * identify command to be sure of reply | |
279 | */ | |
aaaade3f | 280 | if (cmd == ATA_CMD_ID_ATAPI) { |
4e65837b BZ |
281 | ide_task_t task; |
282 | ||
283 | memset(&task, 0, sizeof(task)); | |
284 | /* disable DMA & overlap */ | |
285 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
286 | ||
374e042c | 287 | tp_ops->tf_load(drive, &task); |
4e65837b | 288 | } |
1da177e4 LT |
289 | |
290 | /* ask drive for ID */ | |
374e042c | 291 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 292 | |
aaaade3f | 293 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
1da177e4 LT |
294 | timeout += jiffies; |
295 | do { | |
296 | if (time_after(jiffies, timeout)) { | |
297 | /* drive timed-out */ | |
298 | return 1; | |
299 | } | |
300 | /* give drive a breather */ | |
301 | msleep(50); | |
374e042c BZ |
302 | s = use_altstatus ? tp_ops->read_altstatus(hwif) |
303 | : tp_ops->read_status(hwif); | |
3a7d2484 | 304 | } while (s & ATA_BUSY); |
1da177e4 | 305 | |
3a7d2484 | 306 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 307 | msleep(50); |
374e042c | 308 | s = tp_ops->read_status(hwif); |
c47137a9 | 309 | |
3a7d2484 | 310 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
311 | unsigned long flags; |
312 | ||
313 | /* local CPU only; some systems need this */ | |
314 | local_irq_save(flags); | |
315 | /* drive returned ID */ | |
316 | do_identify(drive, cmd); | |
317 | /* drive responded with ID */ | |
318 | rc = 0; | |
319 | /* clear drive IRQ */ | |
374e042c | 320 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
321 | local_irq_restore(flags); |
322 | } else { | |
323 | /* drive refused ID */ | |
324 | rc = 2; | |
325 | } | |
326 | return rc; | |
327 | } | |
328 | ||
329 | /** | |
330 | * try_to_identify - try to identify a drive | |
331 | * @drive: drive to probe | |
332 | * @cmd: command to use | |
333 | * | |
334 | * Issue the identify command and then do IRQ probing to | |
335 | * complete the identification when needed by finding the | |
336 | * IRQ the drive is attached to | |
337 | */ | |
338 | ||
339 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
340 | { | |
341 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 342 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
343 | int retval; |
344 | int autoprobe = 0; | |
345 | unsigned long cookie = 0; | |
346 | ||
347 | /* | |
348 | * Disable device irq unless we need to | |
349 | * probe for it. Otherwise we'll get spurious | |
350 | * interrupts during the identify-phase that | |
351 | * the irq handler isn't expecting. | |
352 | */ | |
4c3032d8 | 353 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
354 | if (!hwif->irq) { |
355 | autoprobe = 1; | |
356 | cookie = probe_irq_on(); | |
1da177e4 | 357 | } |
374e042c | 358 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
359 | } |
360 | ||
361 | retval = actual_try_to_identify(drive, cmd); | |
362 | ||
363 | if (autoprobe) { | |
364 | int irq; | |
81ca6919 | 365 | |
374e042c | 366 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 367 | /* clear drive IRQ */ |
374e042c | 368 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
369 | udelay(5); |
370 | irq = probe_irq_off(cookie); | |
371 | if (!hwif->irq) { | |
372 | if (irq > 0) { | |
373 | hwif->irq = irq; | |
374 | } else { | |
375 | /* Mmmm.. multiple IRQs.. | |
376 | * don't know which was ours | |
377 | */ | |
1b8ebad8 | 378 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
379 | drive->name, cookie); |
380 | } | |
381 | } | |
382 | } | |
383 | return retval; | |
384 | } | |
385 | ||
3a5015cc BZ |
386 | static int ide_busy_sleep(ide_hwif_t *hwif) |
387 | { | |
388 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
389 | u8 stat; | |
390 | ||
391 | do { | |
392 | msleep(50); | |
374e042c | 393 | stat = hwif->tp_ops->read_status(hwif); |
3a7d2484 | 394 | if ((stat & ATA_BUSY) == 0) |
3a5015cc BZ |
395 | return 0; |
396 | } while (time_before(jiffies, timeout)); | |
397 | ||
398 | return 1; | |
399 | } | |
1da177e4 | 400 | |
1f2efb82 BZ |
401 | static u8 ide_read_device(ide_drive_t *drive) |
402 | { | |
403 | ide_task_t task; | |
404 | ||
405 | memset(&task, 0, sizeof(task)); | |
406 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
407 | ||
374e042c | 408 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
409 | |
410 | return task.tf.device; | |
411 | } | |
412 | ||
1da177e4 LT |
413 | /** |
414 | * do_probe - probe an IDE device | |
415 | * @drive: drive to probe | |
416 | * @cmd: command to use | |
417 | * | |
418 | * do_probe() has the difficult job of finding a drive if it exists, | |
419 | * without getting hung up if it doesn't exist, without trampling on | |
420 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
421 | * | |
422 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
423 | * but does not respond right away, the probe will "hang in there" | |
424 | * for the maximum wait time (about 30 seconds), otherwise it will | |
425 | * exit much more quickly. | |
426 | * | |
427 | * Returns: 0 device was identified | |
428 | * 1 device timed-out (no response to identify request) | |
429 | * 2 device aborted the command (refused to identify itself) | |
430 | * 3 bad status from device (possible for ATAPI drives) | |
431 | * 4 probe was not attempted because failure was obvious | |
432 | */ | |
433 | ||
434 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
435 | { | |
1da177e4 | 436 | ide_hwif_t *hwif = HWIF(drive); |
374e042c | 437 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 BZ |
438 | int rc; |
439 | u8 stat; | |
1da177e4 LT |
440 | |
441 | if (drive->present) { | |
442 | /* avoid waiting for inappropriate probes */ | |
aaaade3f | 443 | if (drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) |
1da177e4 LT |
444 | return 4; |
445 | } | |
446 | #ifdef DEBUG | |
1b8ebad8 | 447 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
1da177e4 | 448 | drive->name, drive->present, drive->media, |
aaaade3f | 449 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
450 | #endif |
451 | ||
452 | /* needed for some systems | |
453 | * (e.g. crw9624 as drive0 with disk as slave) | |
454 | */ | |
455 | msleep(50); | |
456 | SELECT_DRIVE(drive); | |
457 | msleep(50); | |
1f2efb82 BZ |
458 | |
459 | if (ide_read_device(drive) != drive->select.all && !drive->present) { | |
1da177e4 LT |
460 | if (drive->select.b.unit != 0) { |
461 | /* exit with drive0 selected */ | |
462 | SELECT_DRIVE(&hwif->drives[0]); | |
3a7d2484 | 463 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
464 | msleep(50); |
465 | } | |
466 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
467 | return 3; | |
468 | } | |
469 | ||
374e042c | 470 | stat = tp_ops->read_status(hwif); |
c47137a9 | 471 | |
3a7d2484 | 472 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
aaaade3f | 473 | drive->present || cmd == ATA_CMD_ID_ATAPI) { |
1da177e4 LT |
474 | /* send cmd and wait */ |
475 | if ((rc = try_to_identify(drive, cmd))) { | |
476 | /* failed: try again */ | |
477 | rc = try_to_identify(drive,cmd); | |
478 | } | |
57b55275 | 479 | |
374e042c | 480 | stat = tp_ops->read_status(hwif); |
57b55275 | 481 | |
3a7d2484 | 482 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
483 | return 4; |
484 | ||
aaaade3f | 485 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
486 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
487 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 488 | msleep(50); |
e81a3bde | 489 | SELECT_DRIVE(drive); |
1da177e4 | 490 | msleep(50); |
aaaade3f | 491 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
3a5015cc | 492 | (void)ide_busy_sleep(hwif); |
1da177e4 LT |
493 | rc = try_to_identify(drive, cmd); |
494 | } | |
57b55275 BZ |
495 | |
496 | /* ensure drive IRQ is clear */ | |
374e042c | 497 | stat = tp_ops->read_status(hwif); |
57b55275 | 498 | |
1da177e4 | 499 | if (rc == 1) |
57b55275 BZ |
500 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
501 | drive->name, stat); | |
1da177e4 LT |
502 | } else { |
503 | /* not present or maybe ATAPI */ | |
504 | rc = 3; | |
505 | } | |
506 | if (drive->select.b.unit != 0) { | |
507 | /* exit with drive0 selected */ | |
508 | SELECT_DRIVE(&hwif->drives[0]); | |
509 | msleep(50); | |
510 | /* ensure drive irq is clear */ | |
374e042c | 511 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
512 | } |
513 | return rc; | |
514 | } | |
515 | ||
516 | /* | |
517 | * | |
518 | */ | |
519 | static void enable_nest (ide_drive_t *drive) | |
520 | { | |
521 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 522 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 523 | u8 stat; |
1da177e4 | 524 | |
4dde4492 BZ |
525 | printk(KERN_INFO "%s: enabling %s -- ", |
526 | hwif->name, (char *)&drive->id[ATA_ID_PROD]); | |
1b8ebad8 | 527 | |
1da177e4 LT |
528 | SELECT_DRIVE(drive); |
529 | msleep(50); | |
aaaade3f | 530 | tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); |
3a5015cc BZ |
531 | |
532 | if (ide_busy_sleep(hwif)) { | |
533 | printk(KERN_CONT "failed (timeout)\n"); | |
534 | return; | |
535 | } | |
1da177e4 LT |
536 | |
537 | msleep(50); | |
538 | ||
374e042c | 539 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
540 | |
541 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
542 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
543 | else | |
544 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
545 | |
546 | /* if !(success||timed-out) */ | |
aaaade3f | 547 | if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
1da177e4 | 548 | /* look for ATAPI device */ |
aaaade3f | 549 | (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
1da177e4 LT |
550 | } |
551 | ||
552 | /** | |
553 | * probe_for_drives - upper level drive probe | |
554 | * @drive: drive to probe for | |
555 | * | |
556 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
557 | * and presents things to the user as needed. | |
558 | * | |
559 | * Returns: 0 no device was found | |
560 | * 1 device was found (note: drive->present might | |
561 | * still be 0) | |
562 | */ | |
563 | ||
564 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
565 | { | |
4dde4492 BZ |
566 | char *m; |
567 | ||
1da177e4 LT |
568 | /* |
569 | * In order to keep things simple we have an id | |
570 | * block for all drives at all times. If the device | |
571 | * is pre ATA or refuses ATA/ATAPI identify we | |
572 | * will add faked data to this. | |
573 | * | |
574 | * Also note that 0 everywhere means "can't do X" | |
575 | */ | |
576 | ||
f5e3c2fa | 577 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
578 | drive->id_read = 0; |
579 | if(drive->id == NULL) | |
580 | { | |
581 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
582 | return 0; | |
583 | } | |
4dde4492 BZ |
584 | |
585 | m = (char *)&drive->id[ATA_ID_PROD]; | |
586 | strcpy(m, "UNKNOWN"); | |
587 | ||
1da177e4 LT |
588 | /* skip probing? */ |
589 | if (!drive->noprobe) | |
590 | { | |
591 | /* if !(success||timed-out) */ | |
aaaade3f | 592 | if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
1da177e4 | 593 | /* look for ATAPI device */ |
aaaade3f | 594 | (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
1da177e4 LT |
595 | if (!drive->present) |
596 | /* drive not found */ | |
597 | return 0; | |
4dde4492 BZ |
598 | |
599 | if (strstr(m, "E X A B Y T E N E S T")) | |
78595575 | 600 | enable_nest(drive); |
1da177e4 LT |
601 | |
602 | /* identification failed? */ | |
603 | if (!drive->id_read) { | |
604 | if (drive->media == ide_disk) { | |
605 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
606 | drive->name, drive->cyl, | |
607 | drive->head, drive->sect); | |
608 | } else if (drive->media == ide_cdrom) { | |
609 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
610 | } else { | |
611 | /* nuke it */ | |
612 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
613 | drive->present = 0; | |
614 | } | |
615 | } | |
616 | /* drive was found */ | |
617 | } | |
618 | if(!drive->present) | |
619 | return 0; | |
620 | /* The drive wasn't being helpful. Add generic info only */ | |
621 | if (drive->id_read == 0) { | |
622 | generic_id(drive); | |
623 | return 1; | |
624 | } | |
625 | ||
626 | if (drive->media == ide_disk) { | |
627 | ide_disk_init_chs(drive); | |
628 | ide_disk_init_mult_count(drive); | |
629 | } | |
630 | ||
631 | return drive->present; | |
632 | } | |
633 | ||
fc410698 | 634 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
635 | { |
636 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
637 | ||
f36d4024 | 638 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
639 | } |
640 | ||
f74c9141 | 641 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 642 | { |
349ae23f RD |
643 | int ret; |
644 | ||
1da177e4 LT |
645 | /* register with global device tree */ |
646 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
647 | hwif->gendev.driver_data = hwif; | |
648 | if (hwif->gendev.parent == NULL) { | |
36501650 BZ |
649 | if (hwif->dev) |
650 | hwif->gendev.parent = hwif->dev; | |
1da177e4 LT |
651 | else |
652 | /* Would like to do = &device_legacy */ | |
653 | hwif->gendev.parent = NULL; | |
654 | } | |
655 | hwif->gendev.release = hwif_release_dev; | |
349ae23f | 656 | ret = device_register(&hwif->gendev); |
f74c9141 | 657 | if (ret < 0) { |
349ae23f | 658 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 659 | __func__, ret); |
f74c9141 BZ |
660 | goto out; |
661 | } | |
662 | ||
716ad875 GKH |
663 | hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, |
664 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
665 | if (IS_ERR(hwif->portdev)) { |
666 | ret = PTR_ERR(hwif->portdev); | |
667 | device_unregister(&hwif->gendev); | |
668 | } | |
f74c9141 BZ |
669 | out: |
670 | return ret; | |
1da177e4 LT |
671 | } |
672 | ||
c860a8f2 BZ |
673 | /** |
674 | * ide_port_wait_ready - wait for port to become ready | |
675 | * @hwif: IDE port | |
676 | * | |
677 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
678 | * platforms. Typical cases are: | |
679 | * | |
680 | * - The firmware hard reset the disk before booting the kernel, | |
681 | * the drive is still doing it's poweron-reset sequence, that | |
682 | * can take up to 30 seconds. | |
683 | * | |
684 | * - The firmware does nothing (or no firmware), the device is | |
685 | * still in POST state (same as above actually). | |
686 | * | |
687 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
688 | * their reset sequence even when they are non-selected slave | |
689 | * devices, thus preventing discovery of the main HD. | |
690 | * | |
691 | * Doing this wait-for-non-busy should not harm any existing | |
692 | * configuration and fix some issues like the above. | |
693 | * | |
694 | * BenH. | |
695 | * | |
696 | * Returns 0 on success, error code (< 0) otherwise. | |
697 | */ | |
698 | ||
699 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 700 | { |
8266105b | 701 | int unit, rc; |
1da177e4 LT |
702 | |
703 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
704 | ||
705 | /* Let HW settle down a bit from whatever init state we | |
706 | * come from */ | |
707 | mdelay(2); | |
708 | ||
709 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
710 | * I know of at least one disk who takes 31 seconds, I use 35 | |
711 | * here to be safe | |
712 | */ | |
713 | rc = ide_wait_not_busy(hwif, 35000); | |
714 | if (rc) | |
715 | return rc; | |
716 | ||
717 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
718 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
719 | ide_drive_t *drive = &hwif->drives[unit]; | |
720 | ||
721 | /* Ignore disks that we will not probe for later. */ | |
722 | if (!drive->noprobe || drive->present) { | |
723 | SELECT_DRIVE(drive); | |
374e042c | 724 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
725 | mdelay(2); |
726 | rc = ide_wait_not_busy(hwif, 35000); | |
727 | if (rc) | |
728 | goto out; | |
729 | } else | |
730 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
731 | drive->name); | |
732 | } | |
733 | out: | |
1da177e4 | 734 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
735 | if (unit) |
736 | SELECT_DRIVE(&hwif->drives[0]); | |
737 | ||
1da177e4 LT |
738 | return rc; |
739 | } | |
740 | ||
741 | /** | |
742 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 743 | * @dev1: slave device |
1da177e4 LT |
744 | * |
745 | * Analyse the drives on the interface and attempt to decide if we | |
746 | * have the same drive viewed twice. This occurs with crap CF adapters | |
747 | * and PCMCIA sometimes. | |
748 | */ | |
749 | ||
4dde4492 | 750 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 751 | { |
4dde4492 | 752 | ide_drive_t *dev0 = &dev1->hwif->drives[0]; |
1da177e4 | 753 | |
4dde4492 | 754 | if ((dev1->dn & 1) == 0 || dev0->present == 0) |
1da177e4 LT |
755 | return; |
756 | ||
757 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
758 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
759 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
760 | return; |
761 | ||
762 | /* Serial numbers do not match */ | |
4dde4492 BZ |
763 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
764 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
765 | return; |
766 | ||
767 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 768 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
769 | return; |
770 | ||
771 | /* Appears to be an IDE flash adapter with decode bugs */ | |
772 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
773 | ||
4dde4492 | 774 | dev1->present = 0; |
1da177e4 LT |
775 | } |
776 | ||
777 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
778 | ||
9d501529 | 779 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 780 | { |
1da177e4 LT |
781 | unsigned long flags; |
782 | unsigned int irqd; | |
a14dc574 BZ |
783 | int unit, rc = -ENODEV; |
784 | ||
785 | BUG_ON(hwif->present); | |
1da177e4 | 786 | |
e53cd458 | 787 | if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) |
9d501529 | 788 | return -EACCES; |
1da177e4 | 789 | |
1da177e4 LT |
790 | /* |
791 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
792 | * we'll install our IRQ driver much later... | |
793 | */ | |
794 | irqd = hwif->irq; | |
795 | if (irqd) | |
796 | disable_irq(hwif->irq); | |
797 | ||
798 | local_irq_set(flags); | |
799 | ||
c860a8f2 | 800 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
801 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
802 | ||
803 | /* | |
f367bed0 BZ |
804 | * Second drive should only exist if first drive was found, |
805 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 806 | */ |
f367bed0 | 807 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 LT |
808 | ide_drive_t *drive = &hwif->drives[unit]; |
809 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
810 | (void) probe_for_drive(drive); | |
a14dc574 BZ |
811 | if (drive->present) |
812 | rc = 0; | |
1da177e4 | 813 | } |
e460a597 | 814 | |
1da177e4 | 815 | local_irq_restore(flags); |
e460a597 | 816 | |
1da177e4 LT |
817 | /* |
818 | * Use cached IRQ number. It might be (and is...) changed by probe | |
819 | * code above | |
820 | */ | |
821 | if (irqd) | |
822 | enable_irq(irqd); | |
823 | ||
a14dc574 | 824 | return rc; |
e84e7ea7 BZ |
825 | } |
826 | ||
827 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
828 | { | |
ac95beed | 829 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
830 | int unit; |
831 | ||
f01393e4 BZ |
832 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
833 | ide_drive_t *drive = &hwif->drives[unit]; | |
834 | ||
ac95beed BZ |
835 | if (drive->present && port_ops && port_ops->quirkproc) |
836 | port_ops->quirkproc(drive); | |
f01393e4 | 837 | } |
0380dad4 | 838 | |
1da177e4 LT |
839 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
840 | ide_drive_t *drive = &hwif->drives[unit]; | |
841 | ||
842 | if (drive->present) { | |
207daeaa | 843 | ide_set_max_pio(drive); |
1da177e4 | 844 | |
1da177e4 LT |
845 | drive->nice1 = 1; |
846 | ||
5e37bdc0 | 847 | if (hwif->dma_ops) |
8c0697cc | 848 | ide_set_dma(drive); |
1da177e4 LT |
849 | } |
850 | } | |
208a08f7 KG |
851 | |
852 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
853 | ide_drive_t *drive = &hwif->drives[unit]; | |
854 | ||
807b90d0 | 855 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
208a08f7 KG |
856 | drive->no_io_32bit = 1; |
857 | else | |
4dde4492 | 858 | drive->no_io_32bit = drive->id[ATA_ID_DWORD_IO] ? 1 : 0; |
208a08f7 | 859 | } |
1da177e4 LT |
860 | } |
861 | ||
1da177e4 LT |
862 | #if MAX_HWIFS > 1 |
863 | /* | |
864 | * save_match() is used to simplify logic in init_irq() below. | |
865 | * | |
866 | * A loophole here is that we may not know about a particular | |
867 | * hwif's irq until after that hwif is actually probed/initialized.. | |
868 | * This could be a problem for the case where an hwif is on a | |
869 | * dual interface that requires serialization (eg. cmd640) and another | |
870 | * hwif using one of the same irqs is initialized beforehand. | |
871 | * | |
872 | * This routine detects and reports such situations, but does not fix them. | |
873 | */ | |
874 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
875 | { | |
876 | ide_hwif_t *m = *match; | |
877 | ||
878 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
879 | if (!new->hwgroup) | |
880 | return; | |
1b8ebad8 | 881 | printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", |
1da177e4 LT |
882 | hwif->name, new->name, m->name); |
883 | } | |
884 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
885 | *match = new; | |
886 | } | |
887 | #endif /* MAX_HWIFS > 1 */ | |
888 | ||
889 | /* | |
890 | * init request queue | |
891 | */ | |
892 | static int ide_init_queue(ide_drive_t *drive) | |
893 | { | |
165125e1 | 894 | struct request_queue *q; |
1da177e4 LT |
895 | ide_hwif_t *hwif = HWIF(drive); |
896 | int max_sectors = 256; | |
897 | int max_sg_entries = PRD_ENTRIES; | |
898 | ||
899 | /* | |
900 | * Our default set up assumes the normal IDE case, | |
901 | * that is 64K segmenting, standard PRD setup | |
902 | * and LBA28. Some drivers then impose their own | |
903 | * limits and LBA48 we could raise it but as yet | |
904 | * do not. | |
905 | */ | |
1946089a | 906 | |
556e58fe | 907 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
908 | if (!q) |
909 | return 1; | |
910 | ||
911 | q->queuedata = drive; | |
912 | blk_queue_segment_boundary(q, 0xffff); | |
913 | ||
1da177e4 LT |
914 | if (hwif->rqsize < max_sectors) |
915 | max_sectors = hwif->rqsize; | |
916 | blk_queue_max_sectors(q, max_sectors); | |
917 | ||
918 | #ifdef CONFIG_PCI | |
919 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
920 | * creates segments that don't completely match our boundary | |
921 | * requirements and thus need to be broken up again. Because it | |
922 | * doesn't align properly either, we may actually have to break up | |
923 | * to more segments than what was we got in the first place, a max | |
924 | * worst case is twice as many. | |
925 | * This will be fixed once we teach pci_map_sg() about our boundary | |
926 | * requirements, hopefully soon. *FIXME* | |
927 | */ | |
928 | if (!PCI_DMA_BUS_IS_PHYS) | |
929 | max_sg_entries >>= 1; | |
930 | #endif /* CONFIG_PCI */ | |
931 | ||
932 | blk_queue_max_hw_segments(q, max_sg_entries); | |
933 | blk_queue_max_phys_segments(q, max_sg_entries); | |
934 | ||
935 | /* assign drive queue */ | |
936 | drive->queue = q; | |
937 | ||
938 | /* needs drive->queue to be set */ | |
939 | ide_toggle_bounce(drive, 1); | |
940 | ||
1da177e4 LT |
941 | return 0; |
942 | } | |
943 | ||
0947e0dc BZ |
944 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
945 | { | |
946 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
947 | ||
948 | spin_lock_irq(&ide_lock); | |
949 | if (!hwgroup->drive) { | |
950 | /* first drive for hwgroup. */ | |
951 | drive->next = drive; | |
952 | hwgroup->drive = drive; | |
953 | hwgroup->hwif = HWIF(hwgroup->drive); | |
954 | } else { | |
955 | drive->next = hwgroup->drive->next; | |
956 | hwgroup->drive->next = drive; | |
957 | } | |
958 | spin_unlock_irq(&ide_lock); | |
959 | } | |
960 | ||
d5bc6592 BZ |
961 | /* |
962 | * For any present drive: | |
963 | * - allocate the block device queue | |
964 | * - link drive into the hwgroup | |
965 | */ | |
966 | static void ide_port_setup_devices(ide_hwif_t *hwif) | |
967 | { | |
968 | int i; | |
969 | ||
26042d05 | 970 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
971 | for (i = 0; i < MAX_DRIVES; i++) { |
972 | ide_drive_t *drive = &hwif->drives[i]; | |
973 | ||
974 | if (!drive->present) | |
975 | continue; | |
976 | ||
977 | if (ide_init_queue(drive)) { | |
978 | printk(KERN_ERR "ide: failed to init %s\n", | |
979 | drive->name); | |
980 | continue; | |
981 | } | |
982 | ||
983 | ide_add_drive_to_hwgroup(drive); | |
984 | } | |
26042d05 | 985 | mutex_unlock(&ide_cfg_mtx); |
d5bc6592 BZ |
986 | } |
987 | ||
af1cbba3 BZ |
988 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
989 | ||
6059143a BZ |
990 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
991 | { | |
992 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
993 | ||
af1cbba3 BZ |
994 | ide_ports[hwif->index] = NULL; |
995 | ||
6059143a BZ |
996 | spin_lock_irq(&ide_lock); |
997 | /* | |
998 | * Remove us from the hwgroup, and free | |
999 | * the hwgroup if we were the only member | |
1000 | */ | |
1001 | if (hwif->next == hwif) { | |
1002 | BUG_ON(hwgroup->hwif != hwif); | |
1003 | kfree(hwgroup); | |
1004 | } else { | |
1005 | /* There is another interface in hwgroup. | |
1006 | * Unlink us, and set hwgroup->drive and ->hwif to | |
1007 | * something sane. | |
1008 | */ | |
1009 | ide_hwif_t *g = hwgroup->hwif; | |
1010 | ||
1011 | while (g->next != hwif) | |
1012 | g = g->next; | |
1013 | g->next = hwif->next; | |
1014 | if (hwgroup->hwif == hwif) { | |
1015 | /* Chose a random hwif for hwgroup->hwif. | |
1016 | * It's guaranteed that there are no drives | |
1017 | * left in the hwgroup. | |
1018 | */ | |
1019 | BUG_ON(hwgroup->drive != NULL); | |
1020 | hwgroup->hwif = g; | |
1021 | } | |
1022 | BUG_ON(hwgroup->hwif == hwif); | |
1023 | } | |
1024 | spin_unlock_irq(&ide_lock); | |
1025 | } | |
1026 | ||
1da177e4 LT |
1027 | /* |
1028 | * This routine sets up the irq for an ide interface, and creates a new | |
1029 | * hwgroup for the irq/hwif if none was previously assigned. | |
1030 | * | |
1031 | * Much of the code is for correctly detecting/handling irq sharing | |
1032 | * and irq serialization situations. This is somewhat complex because | |
1033 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1034 | */ |
1035 | static int init_irq (ide_hwif_t *hwif) | |
1036 | { | |
4c3032d8 | 1037 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1038 | unsigned int index; |
1039 | ide_hwgroup_t *hwgroup; | |
1040 | ide_hwif_t *match = NULL; | |
1041 | ||
1042 | ||
1043 | BUG_ON(in_interrupt()); | |
1044 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
1045 | BUG_ON(hwif == NULL); |
1046 | ||
ef29888e | 1047 | mutex_lock(&ide_cfg_mtx); |
1da177e4 LT |
1048 | hwif->hwgroup = NULL; |
1049 | #if MAX_HWIFS > 1 | |
1050 | /* | |
1051 | * Group up with any other hwifs that share our irq(s). | |
1052 | */ | |
1053 | for (index = 0; index < MAX_HWIFS; index++) { | |
af1cbba3 BZ |
1054 | ide_hwif_t *h = ide_ports[index]; |
1055 | ||
1056 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
1da177e4 LT |
1057 | if (hwif->irq == h->irq) { |
1058 | hwif->sharing_irq = h->sharing_irq = 1; | |
1059 | if (hwif->chipset != ide_pci || | |
1060 | h->chipset != ide_pci) { | |
1061 | save_match(hwif, h, &match); | |
1062 | } | |
1063 | } | |
1064 | if (hwif->serialized) { | |
1065 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1066 | save_match(hwif, h, &match); | |
1067 | } | |
1068 | if (h->serialized) { | |
1069 | if (h->mate && hwif->irq == h->mate->irq) | |
1070 | save_match(hwif, h, &match); | |
1071 | } | |
1072 | } | |
1073 | } | |
1074 | #endif /* MAX_HWIFS > 1 */ | |
1075 | /* | |
1076 | * If we are still without a hwgroup, then form a new one | |
1077 | */ | |
1078 | if (match) { | |
1079 | hwgroup = match->hwgroup; | |
1080 | hwif->hwgroup = hwgroup; | |
1081 | /* | |
1082 | * Link us into the hwgroup. | |
1083 | * This must be done early, do ensure that unexpected_intr | |
1084 | * can find the hwif and prevent irq storms. | |
1085 | * No drives are attached to the new hwif, choose_drive | |
1086 | * can't do anything stupid (yet). | |
1087 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1088 | * linked list, the first entry is the hwif that owns | |
1089 | * hwgroup->handler - do not change that. | |
1090 | */ | |
1091 | spin_lock_irq(&ide_lock); | |
1092 | hwif->next = hwgroup->hwif->next; | |
1093 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1094 | BUG_ON(hwif->next == hwif); |
1da177e4 LT |
1095 | spin_unlock_irq(&ide_lock); |
1096 | } else { | |
422278ef BZ |
1097 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1098 | hwif_to_node(hwif)); | |
1099 | if (hwgroup == NULL) | |
1100 | goto out_up; | |
1da177e4 LT |
1101 | |
1102 | hwif->hwgroup = hwgroup; | |
422278ef | 1103 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1104 | |
1da177e4 LT |
1105 | init_timer(&hwgroup->timer); |
1106 | hwgroup->timer.function = &ide_timer_expiry; | |
1107 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1108 | } | |
1109 | ||
af1cbba3 BZ |
1110 | ide_ports[hwif->index] = hwif; |
1111 | ||
1da177e4 LT |
1112 | /* |
1113 | * Allocate the irq, if not already obtained for another hwif | |
1114 | */ | |
1115 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1116 | int sa = 0; |
7b892806 | 1117 | #if defined(__mc68000__) |
362537b9 | 1118 | sa = IRQF_SHARED; |
e1771e20 | 1119 | #endif /* __mc68000__ */ |
1da177e4 | 1120 | |
7b5da4be | 1121 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) |
362537b9 | 1122 | sa = IRQF_SHARED; |
1da177e4 | 1123 | |
4c3032d8 | 1124 | if (io_ports->ctl_addr) |
374e042c | 1125 | hwif->tp_ops->set_irq(hwif, 1); |
1da177e4 LT |
1126 | |
1127 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1128 | goto out_unlink; | |
1129 | } | |
1130 | ||
8a0e7e14 BZ |
1131 | if (!hwif->rqsize) { |
1132 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1133 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1134 | hwif->rqsize = 256; | |
1135 | else | |
1136 | hwif->rqsize = 65536; | |
1137 | } | |
1138 | ||
7b892806 | 1139 | #if !defined(__mc68000__) |
1b8ebad8 | 1140 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1141 | io_ports->data_addr, io_ports->status_addr, |
1142 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1143 | #else |
1b8ebad8 | 1144 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1145 | io_ports->data_addr, hwif->irq); |
7b892806 | 1146 | #endif /* __mc68000__ */ |
1da177e4 | 1147 | if (match) |
1b8ebad8 | 1148 | printk(KERN_CONT " (%sed with %s)", |
1da177e4 | 1149 | hwif->sharing_irq ? "shar" : "serializ", match->name); |
1b8ebad8 | 1150 | printk(KERN_CONT "\n"); |
d5bc6592 | 1151 | |
ef29888e | 1152 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1153 | return 0; |
1154 | out_unlink: | |
fbd13088 | 1155 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1156 | out_up: |
ef29888e | 1157 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1158 | return 1; |
1159 | } | |
1160 | ||
1161 | static int ata_lock(dev_t dev, void *data) | |
1162 | { | |
1163 | /* FIXME: we want to pin hwif down */ | |
1164 | return 0; | |
1165 | } | |
1166 | ||
1167 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1168 | { | |
1169 | ide_hwif_t *hwif = data; | |
1170 | int unit = *part >> PARTN_BITS; | |
1171 | ide_drive_t *drive = &hwif->drives[unit]; | |
1172 | if (!drive->present) | |
1173 | return NULL; | |
1174 | ||
1175 | if (drive->media == ide_disk) | |
1176 | request_module("ide-disk"); | |
1177 | if (drive->scsi) | |
1178 | request_module("ide-scsi"); | |
1179 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1180 | request_module("ide-cd"); | |
1181 | if (drive->media == ide_tape) | |
1182 | request_module("ide-tape"); | |
1183 | if (drive->media == ide_floppy) | |
1184 | request_module("ide-floppy"); | |
1185 | ||
1186 | return NULL; | |
1187 | } | |
1188 | ||
1189 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1190 | { | |
1191 | struct gendisk *p = data; | |
1192 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1193 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1194 | } |
1195 | ||
1196 | static int exact_lock(dev_t dev, void *data) | |
1197 | { | |
1198 | struct gendisk *p = data; | |
1199 | ||
1200 | if (!get_disk(p)) | |
1201 | return -1; | |
1202 | return 0; | |
1203 | } | |
1204 | ||
1205 | void ide_register_region(struct gendisk *disk) | |
1206 | { | |
1207 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1208 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1209 | } | |
1210 | ||
1211 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1212 | ||
1213 | void ide_unregister_region(struct gendisk *disk) | |
1214 | { | |
1215 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1216 | disk->minors); | |
1217 | } | |
1218 | ||
1219 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1220 | ||
1221 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1222 | { | |
1223 | ide_hwif_t *hwif = drive->hwif; | |
1224 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1225 | ||
1226 | disk->major = hwif->major; | |
1227 | disk->first_minor = unit << PARTN_BITS; | |
1228 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1229 | disk->queue = drive->queue; | |
1230 | } | |
1231 | ||
1232 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1233 | ||
8604affd BZ |
1234 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1235 | { | |
1236 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1237 | ||
1238 | if (drive == drive->next) { | |
1239 | /* special case: last drive from hwgroup. */ | |
1240 | BUG_ON(hwgroup->drive != drive); | |
1241 | hwgroup->drive = NULL; | |
1242 | } else { | |
1243 | ide_drive_t *walk; | |
1244 | ||
1245 | walk = hwgroup->drive; | |
1246 | while (walk->next != drive) | |
1247 | walk = walk->next; | |
1248 | walk->next = drive->next; | |
1249 | if (hwgroup->drive == drive) { | |
1250 | hwgroup->drive = drive->next; | |
1251 | hwgroup->hwif = hwgroup->drive->hwif; | |
1252 | } | |
1253 | } | |
1254 | BUG_ON(hwgroup->drive == drive); | |
1255 | } | |
1256 | ||
1da177e4 LT |
1257 | static void drive_release_dev (struct device *dev) |
1258 | { | |
1259 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1260 | ||
5b0c4b30 BZ |
1261 | ide_proc_unregister_device(drive); |
1262 | ||
8604affd | 1263 | spin_lock_irq(&ide_lock); |
8604affd | 1264 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1265 | kfree(drive->id); |
1266 | drive->id = NULL; | |
8604affd BZ |
1267 | drive->present = 0; |
1268 | /* Messed up locking ... */ | |
1269 | spin_unlock_irq(&ide_lock); | |
1270 | blk_cleanup_queue(drive->queue); | |
1271 | spin_lock_irq(&ide_lock); | |
1272 | drive->queue = NULL; | |
1273 | spin_unlock_irq(&ide_lock); | |
1274 | ||
f36d4024 | 1275 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1276 | } |
1277 | ||
1da177e4 LT |
1278 | static int hwif_init(ide_hwif_t *hwif) |
1279 | { | |
1280 | int old_irq; | |
1281 | ||
1da177e4 | 1282 | if (!hwif->irq) { |
a861beb1 | 1283 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1284 | if (!hwif->irq) { |
1b8ebad8 | 1285 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1286 | return 0; |
1da177e4 LT |
1287 | } |
1288 | } | |
1da177e4 | 1289 | |
1da177e4 LT |
1290 | if (register_blkdev(hwif->major, hwif->name)) |
1291 | return 0; | |
1292 | ||
1293 | if (!hwif->sg_max_nents) | |
1294 | hwif->sg_max_nents = PRD_ENTRIES; | |
1295 | ||
45711f1a | 1296 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1297 | GFP_KERNEL); |
1298 | if (!hwif->sg_table) { | |
1299 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1300 | goto out; | |
1301 | } | |
45711f1a JA |
1302 | |
1303 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1304 | |
1305 | if (init_irq(hwif) == 0) | |
1306 | goto done; | |
1307 | ||
1308 | old_irq = hwif->irq; | |
1309 | /* | |
1310 | * It failed to initialise. Find the default IRQ for | |
1311 | * this port and try that. | |
1312 | */ | |
a861beb1 | 1313 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1314 | if (!hwif->irq) { |
1b8ebad8 | 1315 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1316 | hwif->name, old_irq); |
1317 | goto out; | |
1318 | } | |
1319 | if (init_irq(hwif)) { | |
1b8ebad8 | 1320 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1321 | hwif->name, old_irq, hwif->irq); |
1322 | goto out; | |
1323 | } | |
1b8ebad8 | 1324 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1325 | hwif->name, hwif->irq); |
1326 | ||
1327 | done: | |
3a4e7c96 BZ |
1328 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1329 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1330 | return 1; |
1331 | ||
1332 | out: | |
1333 | unregister_blkdev(hwif->major, hwif->name); | |
1334 | return 0; | |
1335 | } | |
1336 | ||
9601a607 BZ |
1337 | static void hwif_register_devices(ide_hwif_t *hwif) |
1338 | { | |
1339 | unsigned int i; | |
1340 | ||
1341 | for (i = 0; i < MAX_DRIVES; i++) { | |
1342 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1343 | struct device *dev = &drive->gendev; |
1344 | int ret; | |
9601a607 | 1345 | |
c5d70cc7 BZ |
1346 | if (!drive->present) |
1347 | continue; | |
9601a607 | 1348 | |
c5d70cc7 BZ |
1349 | ide_add_generic_settings(drive); |
1350 | ||
1351 | snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); | |
1352 | dev->parent = &hwif->gendev; | |
1353 | dev->bus = &ide_bus_type; | |
1354 | dev->driver_data = drive; | |
1355 | dev->release = drive_release_dev; | |
1356 | ||
1357 | ret = device_register(dev); | |
1358 | if (ret < 0) | |
1359 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1360 | "%d\n", __func__, ret); | |
9601a607 BZ |
1361 | } |
1362 | } | |
1363 | ||
7704ca2a BZ |
1364 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1365 | { | |
ac95beed | 1366 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1367 | int i; |
1368 | ||
1369 | for (i = 0; i < MAX_DRIVES; i++) { | |
1370 | ide_drive_t *drive = &hwif->drives[i]; | |
1371 | ||
1372 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) | |
1373 | drive->io_32bit = 1; | |
1374 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
1375 | drive->unmask = 1; | |
807b90d0 BZ |
1376 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
1377 | drive->no_unmask = 1; | |
1f2cf8b0 | 1378 | |
e6d95bd1 BZ |
1379 | if (port_ops && port_ops->init_dev) |
1380 | port_ops->init_dev(drive); | |
1381 | } | |
7704ca2a BZ |
1382 | } |
1383 | ||
c413b9b9 BZ |
1384 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1385 | const struct ide_port_info *d) | |
8447d9d5 | 1386 | { |
b7691646 | 1387 | hwif->channel = port; |
c413b9b9 BZ |
1388 | |
1389 | if (d->chipset) | |
1390 | hwif->chipset = d->chipset; | |
1391 | ||
1392 | if (d->init_iops) | |
1393 | d->init_iops(hwif); | |
1394 | ||
c413b9b9 BZ |
1395 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1396 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1397 | hwif->irq = port ? 15 : 14; | |
1398 | ||
23f8e4bf BZ |
1399 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1400 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1401 | hwif->pio_mask = d->pio_mask; |
1402 | ||
374e042c BZ |
1403 | if (d->tp_ops) |
1404 | hwif->tp_ops = d->tp_ops; | |
1405 | ||
ac95beed BZ |
1406 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1407 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1408 | hwif->port_ops = d->port_ops; | |
1409 | ||
c413b9b9 BZ |
1410 | hwif->swdma_mask = d->swdma_mask; |
1411 | hwif->mwdma_mask = d->mwdma_mask; | |
1412 | hwif->ultra_mask = d->udma_mask; | |
1413 | ||
b123f56e BZ |
1414 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1415 | int rc; | |
1416 | ||
1417 | if (d->init_dma) | |
1418 | rc = d->init_dma(hwif, d); | |
1419 | else | |
1420 | rc = ide_hwif_setup_dma(hwif, d); | |
1421 | ||
1422 | if (rc < 0) { | |
1423 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1424 | hwif->dma_base = 0; |
b123f56e BZ |
1425 | hwif->swdma_mask = 0; |
1426 | hwif->mwdma_mask = 0; | |
1427 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1428 | } else if (d->dma_ops) |
1429 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1430 | } |
c413b9b9 | 1431 | |
1024c5f4 BZ |
1432 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
1433 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { | |
1434 | if (hwif->mate) | |
1435 | hwif->mate->serialized = hwif->serialized = 1; | |
1436 | } | |
1437 | ||
c413b9b9 BZ |
1438 | if (d->host_flags & IDE_HFLAG_RQSIZE_256) |
1439 | hwif->rqsize = 256; | |
1440 | ||
1441 | /* call chipset specific routine for each enabled port */ | |
1442 | if (d->init_hwif) | |
1443 | d->init_hwif(hwif); | |
c7f6f21a | 1444 | } |
bfa14b42 | 1445 | |
c7f6f21a BZ |
1446 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1447 | { | |
ac95beed BZ |
1448 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1449 | ||
1450 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1451 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1452 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1453 | } |
c413b9b9 BZ |
1454 | } |
1455 | ||
f74c9141 BZ |
1456 | static ssize_t store_delete_devices(struct device *portdev, |
1457 | struct device_attribute *attr, | |
1458 | const char *buf, size_t n) | |
1459 | { | |
1460 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1461 | ||
1462 | if (strncmp(buf, "1", n)) | |
1463 | return -EINVAL; | |
1464 | ||
1465 | ide_port_unregister_devices(hwif); | |
1466 | ||
1467 | return n; | |
1468 | }; | |
1469 | ||
1470 | static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); | |
1471 | ||
1472 | static ssize_t store_scan(struct device *portdev, | |
1473 | struct device_attribute *attr, | |
1474 | const char *buf, size_t n) | |
1475 | { | |
1476 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1477 | ||
1478 | if (strncmp(buf, "1", n)) | |
1479 | return -EINVAL; | |
1480 | ||
1481 | ide_port_unregister_devices(hwif); | |
1482 | ide_port_scan(hwif); | |
1483 | ||
1484 | return n; | |
1485 | }; | |
1486 | ||
1487 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
1488 | ||
1489 | static struct device_attribute *ide_port_attrs[] = { | |
1490 | &dev_attr_delete_devices, | |
1491 | &dev_attr_scan, | |
1492 | NULL | |
1493 | }; | |
1494 | ||
1495 | static int ide_sysfs_register_port(ide_hwif_t *hwif) | |
1496 | { | |
ca09a237 | 1497 | int i, uninitialized_var(rc); |
f74c9141 BZ |
1498 | |
1499 | for (i = 0; ide_port_attrs[i]; i++) { | |
1500 | rc = device_create_file(hwif->portdev, ide_port_attrs[i]); | |
1501 | if (rc) | |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | return rc; | |
1506 | } | |
1507 | ||
8cdf3100 BZ |
1508 | static unsigned int ide_indexes; |
1509 | ||
fe80b937 | 1510 | /** |
8cdf3100 | 1511 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1512 | * @d: IDE port info |
1513 | * | |
8cdf3100 | 1514 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1515 | */ |
1516 | ||
8cdf3100 | 1517 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1518 | { |
8cdf3100 | 1519 | int idx = -ENOENT; |
fe80b937 | 1520 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1521 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1522 | |
1523 | /* | |
1524 | * Claim an unassigned slot. | |
1525 | * | |
1526 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1527 | * just in case there's another interface yet-to-be-scanned | |
1528 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1529 | * | |
1530 | * Unless there is a bootable card that does not use the standard | |
1531 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1532 | */ | |
8cdf3100 BZ |
1533 | mutex_lock(&ide_cfg_mtx); |
1534 | if (MAX_HWIFS == 1) { | |
1535 | if (ide_indexes == 0 && i == 0) | |
1536 | idx = 1; | |
fe80b937 | 1537 | } else { |
8cdf3100 BZ |
1538 | if (bootable) { |
1539 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1540 | idx = ffz(ide_indexes | i); | |
1541 | } else { | |
1542 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) | |
1543 | idx = ffz(ide_indexes | 3); | |
1544 | else if ((ide_indexes & 3) != 3) | |
1545 | idx = ffz(ide_indexes); | |
fe80b937 BZ |
1546 | } |
1547 | } | |
8cdf3100 BZ |
1548 | if (idx >= 0) |
1549 | ide_indexes |= (1 << idx); | |
1550 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1551 | |
8cdf3100 BZ |
1552 | return idx; |
1553 | } | |
256c5f8e | 1554 | |
8cdf3100 BZ |
1555 | static void ide_free_port_slot(int idx) |
1556 | { | |
1557 | mutex_lock(&ide_cfg_mtx); | |
1558 | ide_indexes &= ~(1 << idx); | |
1559 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1560 | } |
fe80b937 | 1561 | |
48c3c107 BZ |
1562 | struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, |
1563 | hw_regs_t **hws) | |
1564 | { | |
1565 | struct ide_host *host; | |
1566 | int i; | |
1567 | ||
1568 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1569 | if (host == NULL) | |
1570 | return NULL; | |
1571 | ||
1572 | for (i = 0; i < MAX_HWIFS; i++) { | |
1573 | ide_hwif_t *hwif; | |
8cdf3100 | 1574 | int idx; |
48c3c107 BZ |
1575 | |
1576 | if (hws[i] == NULL) | |
1577 | continue; | |
1578 | ||
18de1017 BZ |
1579 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1580 | if (hwif == NULL) | |
1581 | continue; | |
1582 | ||
8cdf3100 BZ |
1583 | idx = ide_find_port_slot(d); |
1584 | if (idx < 0) { | |
1585 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1586 | d ? d->name : "ide"); | |
18de1017 | 1587 | kfree(hwif); |
8cdf3100 | 1588 | continue; |
48c3c107 | 1589 | } |
8cdf3100 | 1590 | |
8cdf3100 BZ |
1591 | ide_init_port_data(hwif, idx); |
1592 | ||
08da591e BZ |
1593 | hwif->host = host; |
1594 | ||
8cdf3100 BZ |
1595 | host->ports[i] = hwif; |
1596 | host->n_ports++; | |
48c3c107 BZ |
1597 | } |
1598 | ||
1599 | if (host->n_ports == 0) { | |
1600 | kfree(host); | |
1601 | return NULL; | |
1602 | } | |
1603 | ||
6cdf6eb3 BZ |
1604 | if (hws[0]) |
1605 | host->dev[0] = hws[0]->dev; | |
1606 | ||
ef0b0427 BZ |
1607 | if (d) |
1608 | host->host_flags = d->host_flags; | |
1609 | ||
48c3c107 BZ |
1610 | return host; |
1611 | } | |
1612 | EXPORT_SYMBOL_GPL(ide_host_alloc_all); | |
1613 | ||
1614 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) | |
1615 | { | |
1616 | hw_regs_t *hws_all[MAX_HWIFS]; | |
1617 | int i; | |
1618 | ||
1619 | for (i = 0; i < MAX_HWIFS; i++) | |
1620 | hws_all[i] = (i < 4) ? hws[i] : NULL; | |
1621 | ||
1622 | return ide_host_alloc_all(d, hws_all); | |
1623 | } | |
1624 | EXPORT_SYMBOL_GPL(ide_host_alloc); | |
1625 | ||
1626 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1627 | hw_regs_t **hws) | |
c413b9b9 BZ |
1628 | { |
1629 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1630 | int i, j = 0; |
8447d9d5 | 1631 | |
c413b9b9 | 1632 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1633 | hwif = host->ports[i]; |
48c3c107 | 1634 | |
e0d00207 | 1635 | if (hwif == NULL) { |
c413b9b9 BZ |
1636 | mate = NULL; |
1637 | continue; | |
1638 | } | |
1639 | ||
c97c6aca | 1640 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1641 | ide_port_apply_params(hwif); |
1642 | ||
1643 | if (d == NULL) { | |
1644 | mate = NULL; | |
1645 | continue; | |
1646 | } | |
1647 | ||
b7691646 | 1648 | if ((i & 1) && mate) { |
c413b9b9 BZ |
1649 | hwif->mate = mate; |
1650 | mate->mate = hwif; | |
1651 | } | |
1652 | ||
1653 | mate = (i & 1) ? NULL : hwif; | |
1654 | ||
1655 | ide_init_port(hwif, i & 1, d); | |
c7f6f21a | 1656 | ide_port_cable_detect(hwif); |
7704ca2a | 1657 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1658 | } |
1659 | ||
151575e4 | 1660 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1661 | hwif = host->ports[i]; |
ba6560aa | 1662 | |
e0d00207 BZ |
1663 | if (hwif == NULL) |
1664 | continue; | |
139ddfca | 1665 | |
eb716beb BZ |
1666 | if (ide_probe_port(hwif) == 0) |
1667 | hwif->present = 1; | |
a14dc574 BZ |
1668 | |
1669 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1670 | !hwif->mate->present) | |
1671 | ide_register_port(hwif); | |
1672 | ||
eb716beb BZ |
1673 | if (hwif->present) |
1674 | ide_port_tune_devices(hwif); | |
2e13093a | 1675 | } |
ba6560aa | 1676 | |
151575e4 | 1677 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1678 | hwif = host->ports[i]; |
2e13093a | 1679 | |
e0d00207 BZ |
1680 | if (hwif == NULL) |
1681 | continue; | |
ba6560aa BZ |
1682 | |
1683 | if (hwif_init(hwif) == 0) { | |
1684 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1685 | "interface\n", hwif->name); | |
48535651 | 1686 | hwif->present = 0; |
ba6560aa BZ |
1687 | continue; |
1688 | } | |
decdc3f0 | 1689 | |
e0d00207 BZ |
1690 | j++; |
1691 | ||
eb716beb BZ |
1692 | if (hwif->present) |
1693 | ide_port_setup_devices(hwif); | |
26042d05 | 1694 | |
decdc3f0 | 1695 | ide_acpi_init(hwif); |
eb716beb BZ |
1696 | |
1697 | if (hwif->present) | |
1698 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1699 | } |
1700 | ||
151575e4 | 1701 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1702 | hwif = host->ports[i]; |
2e13093a | 1703 | |
e0d00207 BZ |
1704 | if (hwif == NULL) |
1705 | continue; | |
ba6560aa | 1706 | |
eb716beb BZ |
1707 | if (hwif->chipset == ide_unknown) |
1708 | hwif->chipset = ide_generic; | |
1709 | ||
1710 | if (hwif->present) | |
ba6560aa | 1711 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1712 | } |
1713 | ||
151575e4 | 1714 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1715 | hwif = host->ports[i]; |
327617e1 | 1716 | |
e0d00207 BZ |
1717 | if (hwif == NULL) |
1718 | continue; | |
327617e1 | 1719 | |
eb716beb BZ |
1720 | ide_sysfs_register_port(hwif); |
1721 | ide_proc_register_port(hwif); | |
1722 | ||
1723 | if (hwif->present) | |
d9270a3f | 1724 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1725 | } |
1726 | ||
e0d00207 | 1727 | return j ? 0 : -1; |
8447d9d5 | 1728 | } |
48c3c107 | 1729 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1730 | |
6f904d01 BZ |
1731 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1732 | struct ide_host **hostp) | |
1733 | { | |
1734 | struct ide_host *host; | |
8a69580e | 1735 | int rc; |
6f904d01 BZ |
1736 | |
1737 | host = ide_host_alloc(d, hws); | |
1738 | if (host == NULL) | |
1739 | return -ENOMEM; | |
1740 | ||
8a69580e BZ |
1741 | rc = ide_host_register(host, d, hws); |
1742 | if (rc) { | |
1743 | ide_host_free(host); | |
1744 | return rc; | |
1745 | } | |
6f904d01 BZ |
1746 | |
1747 | if (hostp) | |
1748 | *hostp = host; | |
1749 | ||
1750 | return 0; | |
1751 | } | |
1752 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1753 | ||
8a69580e | 1754 | void ide_host_free(struct ide_host *host) |
151575e4 | 1755 | { |
8cdf3100 | 1756 | ide_hwif_t *hwif; |
151575e4 | 1757 | int i; |
8447d9d5 | 1758 | |
c97c6aca | 1759 | for (i = 0; i < MAX_HWIFS; i++) { |
8cdf3100 BZ |
1760 | hwif = host->ports[i]; |
1761 | ||
1762 | if (hwif == NULL) | |
1763 | continue; | |
1764 | ||
8cdf3100 | 1765 | ide_free_port_slot(hwif->index); |
18de1017 | 1766 | kfree(hwif); |
c97c6aca | 1767 | } |
151575e4 | 1768 | |
48c3c107 | 1769 | kfree(host); |
151575e4 | 1770 | } |
8a69580e BZ |
1771 | EXPORT_SYMBOL_GPL(ide_host_free); |
1772 | ||
1773 | void ide_host_remove(struct ide_host *host) | |
1774 | { | |
1775 | int i; | |
1776 | ||
1777 | for (i = 0; i < MAX_HWIFS; i++) { | |
1778 | if (host->ports[i]) | |
1779 | ide_unregister(host->ports[i]); | |
1780 | } | |
1781 | ||
1782 | ide_host_free(host); | |
1783 | } | |
48c3c107 | 1784 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1785 | |
1786 | void ide_port_scan(ide_hwif_t *hwif) | |
1787 | { | |
9fd91d95 | 1788 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1789 | ide_port_cable_detect(hwif); |
1790 | ide_port_init_devices(hwif); | |
1791 | ||
1792 | if (ide_probe_port(hwif) < 0) | |
1793 | return; | |
1794 | ||
1795 | hwif->present = 1; | |
1796 | ||
1797 | ide_port_tune_devices(hwif); | |
1798 | ide_acpi_port_init_devices(hwif); | |
1799 | ide_port_setup_devices(hwif); | |
1800 | hwif_register_devices(hwif); | |
1801 | ide_proc_port_register_devices(hwif); | |
1802 | } | |
1803 | EXPORT_SYMBOL_GPL(ide_port_scan); | |
3b36f66b | 1804 | |
48c3c107 | 1805 | static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, |
c97c6aca | 1806 | u8 port_no, const struct ide_port_info *d, |
d9b819a0 | 1807 | unsigned long config) |
3b36f66b | 1808 | { |
d9b819a0 BZ |
1809 | unsigned long base, ctl; |
1810 | int irq; | |
3b36f66b | 1811 | |
d9b819a0 BZ |
1812 | if (port_no == 0) { |
1813 | base = 0x1f0; | |
1814 | ctl = 0x3f6; | |
1815 | irq = 14; | |
1816 | } else { | |
1817 | base = 0x170; | |
1818 | ctl = 0x376; | |
1819 | irq = 15; | |
1820 | } | |
3b36f66b | 1821 | |
d92f1a28 BZ |
1822 | if (!request_region(base, 8, d->name)) { |
1823 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
1824 | d->name, base, base + 7); | |
1825 | return; | |
1826 | } | |
1827 | ||
1828 | if (!request_region(ctl, 1, d->name)) { | |
1829 | printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", | |
1830 | d->name, ctl); | |
1831 | release_region(base, 8); | |
1832 | return; | |
1833 | } | |
1834 | ||
d9b819a0 BZ |
1835 | ide_std_init_ports(hw, base, ctl); |
1836 | hw->irq = irq; | |
d427e836 | 1837 | hw->chipset = d->chipset; |
d6276b5f | 1838 | hw->config = config; |
3b36f66b | 1839 | |
48c3c107 | 1840 | hws[port_no] = hw; |
d9b819a0 | 1841 | } |
3b36f66b | 1842 | |
d9b819a0 BZ |
1843 | int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) |
1844 | { | |
c97c6aca | 1845 | hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; |
0bfeee7d | 1846 | |
d9b819a0 BZ |
1847 | memset(&hw, 0, sizeof(hw)); |
1848 | ||
1849 | if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) | |
48c3c107 BZ |
1850 | ide_legacy_init_one(hws, &hw[0], 0, d, config); |
1851 | ide_legacy_init_one(hws, &hw[1], 1, d, config); | |
d9b819a0 | 1852 | |
48c3c107 | 1853 | if (hws[0] == NULL && hws[1] == NULL && |
d9b819a0 BZ |
1854 | (d->host_flags & IDE_HFLAG_SINGLE)) |
1855 | return -ENOENT; | |
3b36f66b | 1856 | |
6f904d01 | 1857 | return ide_host_add(d, hws, NULL); |
3b36f66b BZ |
1858 | } |
1859 | EXPORT_SYMBOL_GPL(ide_legacy_device_add); |