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) { |
48fb2688 BZ |
92 | if ((max_multsect / 2) > 1) |
93 | id[ATA_ID_MULTSECT] = max_multsect | 0x100; | |
94 | else | |
95 | id[ATA_ID_MULTSECT] &= ~0x1ff; | |
96 | ||
97 | drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; | |
7c51c17e BZ |
98 | |
99 | if (drive->mult_req) | |
df1f8378 | 100 | drive->special.b.set_multmode = 1; |
1da177e4 LT |
101 | } |
102 | } | |
103 | ||
1da177e4 LT |
104 | /** |
105 | * do_identify - identify a drive | |
106 | * @drive: drive to identify | |
107 | * @cmd: command used | |
108 | * | |
109 | * Called when we have issued a drive identify command to | |
110 | * read and parse the results. This function is run with | |
111 | * interrupts disabled. | |
112 | */ | |
113 | ||
114 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
115 | { | |
116 | ide_hwif_t *hwif = HWIF(drive); | |
4dde4492 BZ |
117 | u16 *id = drive->id; |
118 | char *m = (char *)&id[ATA_ID_PROD]; | |
718c72e8 | 119 | int bswap = 1, is_cfa; |
1da177e4 | 120 | |
1da177e4 | 121 | /* read 512 bytes of id info */ |
374e042c | 122 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
1da177e4 | 123 | |
97100fc8 BZ |
124 | drive->dev_flags |= IDE_DFLAG_ID_READ; |
125 | ||
1da177e4 | 126 | local_irq_enable(); |
7b9f25b5 BZ |
127 | #ifdef DEBUG |
128 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
129 | ide_dump_identify((u8 *)id); | |
130 | #endif | |
1da177e4 LT |
131 | ide_fix_driveid(id); |
132 | ||
1da177e4 | 133 | /* |
aaaade3f BZ |
134 | * ATA_CMD_ID_ATA returns little-endian info, |
135 | * ATA_CMD_ID_ATAPI *usually* returns little-endian info. | |
1da177e4 | 136 | */ |
aaaade3f | 137 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 BZ |
138 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
139 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
140 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 141 | /* Vertos drives may still be weird */ |
4dde4492 | 142 | bswap ^= 1; |
1da177e4 | 143 | } |
4dde4492 BZ |
144 | |
145 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
146 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
147 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 148 | |
699b052a | 149 | /* we depend on this a lot! */ |
4dde4492 | 150 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 151 | |
4dde4492 | 152 | if (strstr(m, "E X A B Y T E N E S T")) |
1da177e4 LT |
153 | goto err_misc; |
154 | ||
4dde4492 | 155 | printk(KERN_INFO "%s: %s, ", drive->name, m); |
1b8ebad8 | 156 | |
97100fc8 BZ |
157 | drive->dev_flags |= IDE_DFLAG_PRESENT; |
158 | drive->dev_flags &= ~IDE_DFLAG_DEAD; | |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Check for an ATAPI device | |
162 | */ | |
aaaade3f | 163 | if (cmd == ATA_CMD_ID_ATAPI) { |
4dde4492 | 164 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
1b8ebad8 BZ |
165 | |
166 | printk(KERN_CONT "ATAPI "); | |
1da177e4 LT |
167 | switch (type) { |
168 | case ide_floppy: | |
4dde4492 BZ |
169 | if (!strstr(m, "CD-ROM")) { |
170 | if (!strstr(m, "oppy") && | |
171 | !strstr(m, "poyp") && | |
172 | !strstr(m, "ZIP")) | |
1b8ebad8 | 173 | printk(KERN_CONT "cdrom or floppy?, assuming "); |
1da177e4 | 174 | if (drive->media != ide_cdrom) { |
1b8ebad8 | 175 | printk(KERN_CONT "FLOPPY"); |
97100fc8 | 176 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
177 | break; |
178 | } | |
179 | } | |
180 | /* Early cdrom models used zero */ | |
181 | type = ide_cdrom; | |
182 | case ide_cdrom: | |
97100fc8 | 183 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
184 | #ifdef CONFIG_PPC |
185 | /* kludge for Apple PowerBook internal zip */ | |
4dde4492 | 186 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
1b8ebad8 | 187 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
188 | type = ide_floppy; |
189 | break; | |
190 | } | |
191 | #endif | |
1b8ebad8 | 192 | printk(KERN_CONT "CD/DVD-ROM"); |
1da177e4 LT |
193 | break; |
194 | case ide_tape: | |
1b8ebad8 | 195 | printk(KERN_CONT "TAPE"); |
1da177e4 LT |
196 | break; |
197 | case ide_optical: | |
1b8ebad8 | 198 | printk(KERN_CONT "OPTICAL"); |
97100fc8 | 199 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 LT |
200 | break; |
201 | default: | |
1b8ebad8 | 202 | printk(KERN_CONT "UNKNOWN (type %d)", type); |
1da177e4 LT |
203 | break; |
204 | } | |
1b8ebad8 | 205 | printk(KERN_CONT " drive\n"); |
1da177e4 LT |
206 | drive->media = type; |
207 | /* an ATAPI device ignores DRDY */ | |
208 | drive->ready_stat = 0; | |
4ab3d502 BZ |
209 | if (ata_id_cdb_intr(id)) |
210 | drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT; | |
42619d35 | 211 | drive->dev_flags |= IDE_DFLAG_DOORLOCKING; |
4abdc6ee EO |
212 | /* we don't do head unloading on ATAPI devices */ |
213 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
1da177e4 LT |
214 | return; |
215 | } | |
216 | ||
217 | /* | |
218 | * Not an ATAPI device: looks like a "regular" hard disk | |
219 | */ | |
98109337 | 220 | |
718c72e8 BZ |
221 | is_cfa = ata_id_is_cfa(id); |
222 | ||
223 | /* CF devices are *not* removable in Linux definition of the term */ | |
224 | if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7))) | |
97100fc8 | 225 | drive->dev_flags |= IDE_DFLAG_REMOVABLE; |
1da177e4 | 226 | |
1da177e4 | 227 | drive->media = ide_disk; |
1b8ebad8 | 228 | |
4abdc6ee EO |
229 | if (!ata_id_has_unload(drive->id)) |
230 | drive->dev_flags |= IDE_DFLAG_NO_UNLOAD; | |
231 | ||
718c72e8 | 232 | printk(KERN_CONT "%s DISK drive\n", is_cfa ? "CFA" : "ATA"); |
cd3dbc99 | 233 | |
1da177e4 LT |
234 | return; |
235 | ||
236 | err_misc: | |
237 | kfree(id); | |
97100fc8 | 238 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
239 | return; |
240 | } | |
241 | ||
242 | /** | |
243 | * actual_try_to_identify - send ata/atapi identify | |
244 | * @drive: drive to identify | |
245 | * @cmd: command to use | |
246 | * | |
247 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
248 | * and waits for a response. It also monitors irqs while this is | |
249 | * happening, in hope of automatically determining which one is | |
250 | * being used by the interface. | |
251 | * | |
252 | * Returns: 0 device was identified | |
253 | * 1 device timed-out (no response to identify request) | |
254 | * 2 device aborted the command (refused to identify itself) | |
255 | */ | |
256 | ||
257 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
258 | { | |
259 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 260 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 261 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 262 | int use_altstatus = 0, rc; |
1da177e4 LT |
263 | unsigned long timeout; |
264 | u8 s = 0, a = 0; | |
265 | ||
266 | /* take a deep breath */ | |
267 | msleep(50); | |
268 | ||
6636487e BZ |
269 | if (io_ports->ctl_addr && |
270 | (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) { | |
374e042c BZ |
271 | a = tp_ops->read_altstatus(hwif); |
272 | s = tp_ops->read_status(hwif); | |
3a7d2484 | 273 | if ((a ^ s) & ~ATA_IDX) |
1da177e4 | 274 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
275 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
276 | "instead of ALTSTATUS(0x%02x)\n", | |
277 | drive->name, s, a); | |
278 | else | |
1da177e4 | 279 | /* use non-intrusive polling */ |
c47137a9 BZ |
280 | use_altstatus = 1; |
281 | } | |
1da177e4 LT |
282 | |
283 | /* set features register for atapi | |
284 | * identify command to be sure of reply | |
285 | */ | |
aaaade3f | 286 | if (cmd == ATA_CMD_ID_ATAPI) { |
4e65837b BZ |
287 | ide_task_t task; |
288 | ||
289 | memset(&task, 0, sizeof(task)); | |
290 | /* disable DMA & overlap */ | |
291 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
292 | ||
374e042c | 293 | tp_ops->tf_load(drive, &task); |
4e65837b | 294 | } |
1da177e4 LT |
295 | |
296 | /* ask drive for ID */ | |
374e042c | 297 | tp_ops->exec_command(hwif, cmd); |
1da177e4 | 298 | |
aaaade3f | 299 | timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; |
b163f46d BZ |
300 | |
301 | if (ide_busy_sleep(hwif, timeout, use_altstatus)) | |
302 | return 1; | |
1da177e4 | 303 | |
3a7d2484 | 304 | /* wait for IRQ and ATA_DRQ */ |
1da177e4 | 305 | msleep(50); |
374e042c | 306 | s = tp_ops->read_status(hwif); |
c47137a9 | 307 | |
3a7d2484 | 308 | if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) { |
1da177e4 LT |
309 | unsigned long flags; |
310 | ||
311 | /* local CPU only; some systems need this */ | |
312 | local_irq_save(flags); | |
313 | /* drive returned ID */ | |
314 | do_identify(drive, cmd); | |
315 | /* drive responded with ID */ | |
316 | rc = 0; | |
317 | /* clear drive IRQ */ | |
374e042c | 318 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
319 | local_irq_restore(flags); |
320 | } else { | |
321 | /* drive refused ID */ | |
322 | rc = 2; | |
323 | } | |
324 | return rc; | |
325 | } | |
326 | ||
327 | /** | |
328 | * try_to_identify - try to identify a drive | |
329 | * @drive: drive to probe | |
330 | * @cmd: command to use | |
331 | * | |
332 | * Issue the identify command and then do IRQ probing to | |
333 | * complete the identification when needed by finding the | |
334 | * IRQ the drive is attached to | |
335 | */ | |
336 | ||
337 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
338 | { | |
339 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 340 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
341 | int retval; |
342 | int autoprobe = 0; | |
343 | unsigned long cookie = 0; | |
344 | ||
345 | /* | |
346 | * Disable device irq unless we need to | |
347 | * probe for it. Otherwise we'll get spurious | |
348 | * interrupts during the identify-phase that | |
349 | * the irq handler isn't expecting. | |
350 | */ | |
4c3032d8 | 351 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
352 | if (!hwif->irq) { |
353 | autoprobe = 1; | |
354 | cookie = probe_irq_on(); | |
1da177e4 | 355 | } |
374e042c | 356 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
357 | } |
358 | ||
359 | retval = actual_try_to_identify(drive, cmd); | |
360 | ||
361 | if (autoprobe) { | |
362 | int irq; | |
81ca6919 | 363 | |
374e042c | 364 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 365 | /* clear drive IRQ */ |
374e042c | 366 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
367 | udelay(5); |
368 | irq = probe_irq_off(cookie); | |
369 | if (!hwif->irq) { | |
370 | if (irq > 0) { | |
371 | hwif->irq = irq; | |
372 | } else { | |
373 | /* Mmmm.. multiple IRQs.. | |
374 | * don't know which was ours | |
375 | */ | |
1b8ebad8 | 376 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
377 | drive->name, cookie); |
378 | } | |
379 | } | |
380 | } | |
381 | return retval; | |
382 | } | |
383 | ||
b163f46d | 384 | int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus) |
3a5015cc | 385 | { |
3a5015cc BZ |
386 | u8 stat; |
387 | ||
b163f46d BZ |
388 | timeout += jiffies; |
389 | ||
3a5015cc | 390 | do { |
b163f46d BZ |
391 | msleep(50); /* give drive a breather */ |
392 | stat = altstatus ? hwif->tp_ops->read_altstatus(hwif) | |
393 | : 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 | ||
b163f46d | 398 | return 1; /* drive timed-out */ |
3a5015cc | 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 | 438 | int rc; |
97100fc8 BZ |
439 | u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat; |
440 | ||
441 | /* avoid waiting for inappropriate probes */ | |
442 | if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA) | |
443 | return 4; | |
1da177e4 | 444 | |
1da177e4 | 445 | #ifdef DEBUG |
1b8ebad8 | 446 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
97100fc8 | 447 | drive->name, present, drive->media, |
aaaade3f | 448 | (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI"); |
1da177e4 LT |
449 | #endif |
450 | ||
451 | /* needed for some systems | |
452 | * (e.g. crw9624 as drive0 with disk as slave) | |
453 | */ | |
454 | msleep(50); | |
455 | SELECT_DRIVE(drive); | |
456 | msleep(50); | |
1f2efb82 | 457 | |
7f612f27 | 458 | if (ide_read_device(drive) != drive->select && present == 0) { |
123995b9 | 459 | if (drive->dn & 1) { |
1da177e4 LT |
460 | /* exit with drive0 selected */ |
461 | SELECT_DRIVE(&hwif->drives[0]); | |
3a7d2484 | 462 | /* allow ATA_BUSY to assert & clear */ |
1da177e4 LT |
463 | msleep(50); |
464 | } | |
465 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
466 | return 3; | |
467 | } | |
468 | ||
374e042c | 469 | stat = tp_ops->read_status(hwif); |
c47137a9 | 470 | |
3a7d2484 | 471 | if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) || |
97100fc8 | 472 | present || cmd == ATA_CMD_ID_ATAPI) { |
1da177e4 LT |
473 | /* send cmd and wait */ |
474 | if ((rc = try_to_identify(drive, cmd))) { | |
475 | /* failed: try again */ | |
476 | rc = try_to_identify(drive,cmd); | |
477 | } | |
57b55275 | 478 | |
374e042c | 479 | stat = tp_ops->read_status(hwif); |
57b55275 | 480 | |
3a7d2484 | 481 | if (stat == (ATA_BUSY | ATA_DRDY)) |
1da177e4 LT |
482 | return 4; |
483 | ||
aaaade3f | 484 | if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) { |
57b55275 BZ |
485 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
486 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 487 | msleep(50); |
e81a3bde | 488 | SELECT_DRIVE(drive); |
1da177e4 | 489 | msleep(50); |
aaaade3f | 490 | tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET); |
b163f46d | 491 | (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0); |
1da177e4 LT |
492 | rc = try_to_identify(drive, cmd); |
493 | } | |
57b55275 BZ |
494 | |
495 | /* ensure drive IRQ is clear */ | |
374e042c | 496 | stat = tp_ops->read_status(hwif); |
57b55275 | 497 | |
1da177e4 | 498 | if (rc == 1) |
57b55275 BZ |
499 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
500 | drive->name, stat); | |
1da177e4 LT |
501 | } else { |
502 | /* not present or maybe ATAPI */ | |
503 | rc = 3; | |
504 | } | |
123995b9 | 505 | if (drive->dn & 1) { |
1da177e4 LT |
506 | /* exit with drive0 selected */ |
507 | SELECT_DRIVE(&hwif->drives[0]); | |
508 | msleep(50); | |
509 | /* ensure drive irq is clear */ | |
374e042c | 510 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
511 | } |
512 | return rc; | |
513 | } | |
514 | ||
515 | /* | |
516 | * | |
517 | */ | |
518 | static void enable_nest (ide_drive_t *drive) | |
519 | { | |
520 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 521 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 522 | u8 stat; |
1da177e4 | 523 | |
4dde4492 BZ |
524 | printk(KERN_INFO "%s: enabling %s -- ", |
525 | hwif->name, (char *)&drive->id[ATA_ID_PROD]); | |
1b8ebad8 | 526 | |
1da177e4 LT |
527 | SELECT_DRIVE(drive); |
528 | msleep(50); | |
aaaade3f | 529 | tp_ops->exec_command(hwif, ATA_EXABYTE_ENABLE_NEST); |
3a5015cc | 530 | |
b163f46d | 531 | if (ide_busy_sleep(hwif, WAIT_WORSTCASE, 0)) { |
3a5015cc BZ |
532 | printk(KERN_CONT "failed (timeout)\n"); |
533 | return; | |
534 | } | |
1da177e4 LT |
535 | |
536 | msleep(50); | |
537 | ||
374e042c | 538 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
539 | |
540 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
541 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
542 | else | |
543 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
544 | } |
545 | ||
546 | /** | |
547 | * probe_for_drives - upper level drive probe | |
548 | * @drive: drive to probe for | |
549 | * | |
550 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
551 | * and presents things to the user as needed. | |
552 | * | |
553 | * Returns: 0 no device was found | |
97100fc8 BZ |
554 | * 1 device was found |
555 | * (note: IDE_DFLAG_PRESENT might still be not set) | |
1da177e4 LT |
556 | */ |
557 | ||
558 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
559 | { | |
4dde4492 BZ |
560 | char *m; |
561 | ||
1da177e4 LT |
562 | /* |
563 | * In order to keep things simple we have an id | |
564 | * block for all drives at all times. If the device | |
565 | * is pre ATA or refuses ATA/ATAPI identify we | |
566 | * will add faked data to this. | |
567 | * | |
568 | * Also note that 0 everywhere means "can't do X" | |
569 | */ | |
570 | ||
97100fc8 BZ |
571 | drive->dev_flags &= ~IDE_DFLAG_ID_READ; |
572 | ||
151a6701 | 573 | drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL); |
97100fc8 | 574 | if (drive->id == NULL) { |
1da177e4 LT |
575 | printk(KERN_ERR "ide: out of memory for id data.\n"); |
576 | return 0; | |
577 | } | |
4dde4492 BZ |
578 | |
579 | m = (char *)&drive->id[ATA_ID_PROD]; | |
580 | strcpy(m, "UNKNOWN"); | |
581 | ||
1da177e4 | 582 | /* skip probing? */ |
97100fc8 | 583 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) { |
c36a7e98 | 584 | retry: |
1da177e4 | 585 | /* if !(success||timed-out) */ |
aaaade3f | 586 | if (do_probe(drive, ATA_CMD_ID_ATA) >= 2) |
1da177e4 | 587 | /* look for ATAPI device */ |
aaaade3f | 588 | (void)do_probe(drive, ATA_CMD_ID_ATAPI); |
c36a7e98 | 589 | |
97100fc8 | 590 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
1da177e4 LT |
591 | /* drive not found */ |
592 | return 0; | |
4dde4492 | 593 | |
c36a7e98 | 594 | if (strstr(m, "E X A B Y T E N E S T")) { |
78595575 | 595 | enable_nest(drive); |
c36a7e98 BZ |
596 | goto retry; |
597 | } | |
598 | ||
1da177e4 | 599 | /* identification failed? */ |
97100fc8 | 600 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
601 | if (drive->media == ide_disk) { |
602 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
603 | drive->name, drive->cyl, | |
604 | drive->head, drive->sect); | |
605 | } else if (drive->media == ide_cdrom) { | |
606 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
607 | } else { | |
608 | /* nuke it */ | |
609 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
97100fc8 | 610 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
1da177e4 LT |
611 | } |
612 | } | |
613 | /* drive was found */ | |
614 | } | |
97100fc8 BZ |
615 | |
616 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 | 617 | return 0; |
97100fc8 | 618 | |
1da177e4 | 619 | /* The drive wasn't being helpful. Add generic info only */ |
97100fc8 | 620 | if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) { |
1da177e4 LT |
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 | ||
97100fc8 | 630 | return !!(drive->dev_flags & IDE_DFLAG_PRESENT); |
1da177e4 LT |
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 | ||
3ee074bf GKH |
662 | hwif->portdev = device_create(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. */ | |
97100fc8 BZ |
721 | if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 || |
722 | (drive->dev_flags & IDE_DFLAG_PRESENT)) { | |
8266105b | 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 | |
97100fc8 | 754 | if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_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 | ||
97100fc8 | 774 | dev1->dev_flags &= ~IDE_DFLAG_PRESENT; |
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 | |
97100fc8 BZ |
787 | if ((hwif->drives[0].dev_flags & IDE_DFLAG_NOPROBE) && |
788 | (hwif->drives[1].dev_flags & IDE_DFLAG_NOPROBE)) | |
9d501529 | 789 | return -EACCES; |
1da177e4 | 790 | |
1da177e4 LT |
791 | /* |
792 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
793 | * we'll install our IRQ driver much later... | |
794 | */ | |
795 | irqd = hwif->irq; | |
796 | if (irqd) | |
797 | disable_irq(hwif->irq); | |
798 | ||
799 | local_irq_set(flags); | |
800 | ||
c860a8f2 | 801 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
802 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
803 | ||
804 | /* | |
f367bed0 BZ |
805 | * Second drive should only exist if first drive was found, |
806 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 807 | */ |
f367bed0 | 808 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 | 809 | ide_drive_t *drive = &hwif->drives[unit]; |
123995b9 | 810 | |
1da177e4 | 811 | (void) probe_for_drive(drive); |
97100fc8 | 812 | if (drive->dev_flags & IDE_DFLAG_PRESENT) |
a14dc574 | 813 | rc = 0; |
1da177e4 | 814 | } |
e460a597 | 815 | |
1da177e4 | 816 | local_irq_restore(flags); |
e460a597 | 817 | |
1da177e4 LT |
818 | /* |
819 | * Use cached IRQ number. It might be (and is...) changed by probe | |
820 | * code above | |
821 | */ | |
822 | if (irqd) | |
823 | enable_irq(irqd); | |
824 | ||
a14dc574 | 825 | return rc; |
e84e7ea7 BZ |
826 | } |
827 | ||
828 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
829 | { | |
ac95beed | 830 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
831 | int unit; |
832 | ||
f01393e4 BZ |
833 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
834 | ide_drive_t *drive = &hwif->drives[unit]; | |
835 | ||
97100fc8 BZ |
836 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
837 | if (port_ops && port_ops->quirkproc) | |
838 | port_ops->quirkproc(drive); | |
839 | } | |
f01393e4 | 840 | } |
0380dad4 | 841 | |
1da177e4 LT |
842 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
843 | ide_drive_t *drive = &hwif->drives[unit]; | |
844 | ||
97100fc8 | 845 | if (drive->dev_flags & IDE_DFLAG_PRESENT) { |
207daeaa | 846 | ide_set_max_pio(drive); |
1da177e4 | 847 | |
97100fc8 | 848 | drive->dev_flags |= IDE_DFLAG_NICE1; |
1da177e4 | 849 | |
5e37bdc0 | 850 | if (hwif->dma_ops) |
8c0697cc | 851 | ide_set_dma(drive); |
1da177e4 LT |
852 | } |
853 | } | |
208a08f7 KG |
854 | |
855 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
856 | ide_drive_t *drive = &hwif->drives[unit]; | |
857 | ||
97100fc8 BZ |
858 | if ((hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) || |
859 | drive->id[ATA_ID_DWORD_IO]) | |
860 | drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT; | |
208a08f7 | 861 | else |
97100fc8 | 862 | drive->dev_flags &= ~IDE_DFLAG_NO_IO_32BIT; |
208a08f7 | 863 | } |
1da177e4 LT |
864 | } |
865 | ||
1da177e4 LT |
866 | /* |
867 | * save_match() is used to simplify logic in init_irq() below. | |
868 | * | |
869 | * A loophole here is that we may not know about a particular | |
870 | * hwif's irq until after that hwif is actually probed/initialized.. | |
871 | * This could be a problem for the case where an hwif is on a | |
872 | * dual interface that requires serialization (eg. cmd640) and another | |
873 | * hwif using one of the same irqs is initialized beforehand. | |
874 | * | |
875 | * This routine detects and reports such situations, but does not fix them. | |
876 | */ | |
877 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
878 | { | |
879 | ide_hwif_t *m = *match; | |
880 | ||
881 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
882 | if (!new->hwgroup) | |
883 | return; | |
1b8ebad8 | 884 | printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", |
1da177e4 LT |
885 | hwif->name, new->name, m->name); |
886 | } | |
887 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
888 | *match = new; | |
889 | } | |
1da177e4 LT |
890 | |
891 | /* | |
892 | * init request queue | |
893 | */ | |
894 | static int ide_init_queue(ide_drive_t *drive) | |
895 | { | |
165125e1 | 896 | struct request_queue *q; |
1da177e4 LT |
897 | ide_hwif_t *hwif = HWIF(drive); |
898 | int max_sectors = 256; | |
899 | int max_sg_entries = PRD_ENTRIES; | |
900 | ||
901 | /* | |
902 | * Our default set up assumes the normal IDE case, | |
903 | * that is 64K segmenting, standard PRD setup | |
904 | * and LBA28. Some drivers then impose their own | |
905 | * limits and LBA48 we could raise it but as yet | |
906 | * do not. | |
907 | */ | |
1946089a | 908 | |
2a2ca6a9 BZ |
909 | q = blk_init_queue_node(do_ide_request, &hwif->hwgroup->lock, |
910 | hwif_to_node(hwif)); | |
1da177e4 LT |
911 | if (!q) |
912 | return 1; | |
913 | ||
914 | q->queuedata = drive; | |
915 | blk_queue_segment_boundary(q, 0xffff); | |
916 | ||
1da177e4 LT |
917 | if (hwif->rqsize < max_sectors) |
918 | max_sectors = hwif->rqsize; | |
919 | blk_queue_max_sectors(q, max_sectors); | |
920 | ||
921 | #ifdef CONFIG_PCI | |
922 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
923 | * creates segments that don't completely match our boundary | |
924 | * requirements and thus need to be broken up again. Because it | |
925 | * doesn't align properly either, we may actually have to break up | |
926 | * to more segments than what was we got in the first place, a max | |
927 | * worst case is twice as many. | |
928 | * This will be fixed once we teach pci_map_sg() about our boundary | |
929 | * requirements, hopefully soon. *FIXME* | |
930 | */ | |
931 | if (!PCI_DMA_BUS_IS_PHYS) | |
932 | max_sg_entries >>= 1; | |
933 | #endif /* CONFIG_PCI */ | |
934 | ||
935 | blk_queue_max_hw_segments(q, max_sg_entries); | |
936 | blk_queue_max_phys_segments(q, max_sg_entries); | |
937 | ||
938 | /* assign drive queue */ | |
939 | drive->queue = q; | |
940 | ||
941 | /* needs drive->queue to be set */ | |
942 | ide_toggle_bounce(drive, 1); | |
943 | ||
1da177e4 LT |
944 | return 0; |
945 | } | |
946 | ||
0947e0dc BZ |
947 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
948 | { | |
949 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
950 | ||
2a2ca6a9 | 951 | spin_lock_irq(&hwgroup->lock); |
0947e0dc BZ |
952 | if (!hwgroup->drive) { |
953 | /* first drive for hwgroup. */ | |
954 | drive->next = drive; | |
955 | hwgroup->drive = drive; | |
956 | hwgroup->hwif = HWIF(hwgroup->drive); | |
957 | } else { | |
958 | drive->next = hwgroup->drive->next; | |
959 | hwgroup->drive->next = drive; | |
960 | } | |
2a2ca6a9 | 961 | spin_unlock_irq(&hwgroup->lock); |
0947e0dc BZ |
962 | } |
963 | ||
d5bc6592 BZ |
964 | /* |
965 | * For any present drive: | |
966 | * - allocate the block device queue | |
967 | * - link drive into the hwgroup | |
968 | */ | |
e415e495 | 969 | static int ide_port_setup_devices(ide_hwif_t *hwif) |
d5bc6592 | 970 | { |
e415e495 | 971 | int i, j = 0; |
d5bc6592 | 972 | |
26042d05 | 973 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
974 | for (i = 0; i < MAX_DRIVES; i++) { |
975 | ide_drive_t *drive = &hwif->drives[i]; | |
976 | ||
97100fc8 | 977 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
d5bc6592 BZ |
978 | continue; |
979 | ||
980 | if (ide_init_queue(drive)) { | |
981 | printk(KERN_ERR "ide: failed to init %s\n", | |
982 | drive->name); | |
e415e495 EO |
983 | kfree(drive->id); |
984 | drive->id = NULL; | |
985 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; | |
d5bc6592 BZ |
986 | continue; |
987 | } | |
988 | ||
e415e495 EO |
989 | j++; |
990 | ||
d5bc6592 BZ |
991 | ide_add_drive_to_hwgroup(drive); |
992 | } | |
26042d05 | 993 | mutex_unlock(&ide_cfg_mtx); |
e415e495 EO |
994 | |
995 | return j; | |
d5bc6592 BZ |
996 | } |
997 | ||
af1cbba3 BZ |
998 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
999 | ||
6059143a BZ |
1000 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
1001 | { | |
1002 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
1003 | ||
af1cbba3 BZ |
1004 | ide_ports[hwif->index] = NULL; |
1005 | ||
2a2ca6a9 | 1006 | spin_lock_irq(&hwgroup->lock); |
6059143a BZ |
1007 | /* |
1008 | * Remove us from the hwgroup, and free | |
1009 | * the hwgroup if we were the only member | |
1010 | */ | |
1011 | if (hwif->next == hwif) { | |
1012 | BUG_ON(hwgroup->hwif != hwif); | |
1013 | kfree(hwgroup); | |
1014 | } else { | |
1015 | /* There is another interface in hwgroup. | |
1016 | * Unlink us, and set hwgroup->drive and ->hwif to | |
1017 | * something sane. | |
1018 | */ | |
1019 | ide_hwif_t *g = hwgroup->hwif; | |
1020 | ||
1021 | while (g->next != hwif) | |
1022 | g = g->next; | |
1023 | g->next = hwif->next; | |
1024 | if (hwgroup->hwif == hwif) { | |
1025 | /* Chose a random hwif for hwgroup->hwif. | |
1026 | * It's guaranteed that there are no drives | |
1027 | * left in the hwgroup. | |
1028 | */ | |
1029 | BUG_ON(hwgroup->drive != NULL); | |
1030 | hwgroup->hwif = g; | |
1031 | } | |
1032 | BUG_ON(hwgroup->hwif == hwif); | |
1033 | } | |
2a2ca6a9 | 1034 | spin_unlock_irq(&hwgroup->lock); |
6059143a BZ |
1035 | } |
1036 | ||
1da177e4 LT |
1037 | /* |
1038 | * This routine sets up the irq for an ide interface, and creates a new | |
1039 | * hwgroup for the irq/hwif if none was previously assigned. | |
1040 | * | |
1041 | * Much of the code is for correctly detecting/handling irq sharing | |
1042 | * and irq serialization situations. This is somewhat complex because | |
1043 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1044 | */ |
1045 | static int init_irq (ide_hwif_t *hwif) | |
1046 | { | |
4c3032d8 | 1047 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1048 | unsigned int index; |
1049 | ide_hwgroup_t *hwgroup; | |
1050 | ide_hwif_t *match = NULL; | |
1051 | ||
ef29888e | 1052 | mutex_lock(&ide_cfg_mtx); |
1da177e4 | 1053 | hwif->hwgroup = NULL; |
75d21fff | 1054 | |
1da177e4 LT |
1055 | /* |
1056 | * Group up with any other hwifs that share our irq(s). | |
1057 | */ | |
1058 | for (index = 0; index < MAX_HWIFS; index++) { | |
af1cbba3 BZ |
1059 | ide_hwif_t *h = ide_ports[index]; |
1060 | ||
1061 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
1da177e4 | 1062 | if (hwif->irq == h->irq) { |
1da177e4 LT |
1063 | if (hwif->chipset != ide_pci || |
1064 | h->chipset != ide_pci) { | |
1065 | save_match(hwif, h, &match); | |
1066 | } | |
1067 | } | |
1068 | if (hwif->serialized) { | |
1069 | if (hwif->mate && hwif->mate->irq == h->irq) | |
1070 | save_match(hwif, h, &match); | |
1071 | } | |
1072 | if (h->serialized) { | |
1073 | if (h->mate && hwif->irq == h->mate->irq) | |
1074 | save_match(hwif, h, &match); | |
1075 | } | |
1076 | } | |
1077 | } | |
75d21fff | 1078 | |
1da177e4 LT |
1079 | /* |
1080 | * If we are still without a hwgroup, then form a new one | |
1081 | */ | |
1082 | if (match) { | |
1083 | hwgroup = match->hwgroup; | |
1084 | hwif->hwgroup = hwgroup; | |
1085 | /* | |
1086 | * Link us into the hwgroup. | |
1087 | * This must be done early, do ensure that unexpected_intr | |
1088 | * can find the hwif and prevent irq storms. | |
1089 | * No drives are attached to the new hwif, choose_drive | |
1090 | * can't do anything stupid (yet). | |
1091 | * Add ourself as the 2nd entry to the hwgroup->hwif | |
1092 | * linked list, the first entry is the hwif that owns | |
1093 | * hwgroup->handler - do not change that. | |
1094 | */ | |
2a2ca6a9 | 1095 | spin_lock_irq(&hwgroup->lock); |
1da177e4 LT |
1096 | hwif->next = hwgroup->hwif->next; |
1097 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1098 | BUG_ON(hwif->next == hwif); |
2a2ca6a9 | 1099 | spin_unlock_irq(&hwgroup->lock); |
1da177e4 | 1100 | } else { |
422278ef BZ |
1101 | hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO, |
1102 | hwif_to_node(hwif)); | |
1103 | if (hwgroup == NULL) | |
1104 | goto out_up; | |
1da177e4 | 1105 | |
2a2ca6a9 BZ |
1106 | spin_lock_init(&hwgroup->lock); |
1107 | ||
1da177e4 | 1108 | hwif->hwgroup = hwgroup; |
422278ef | 1109 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1110 | |
1da177e4 LT |
1111 | init_timer(&hwgroup->timer); |
1112 | hwgroup->timer.function = &ide_timer_expiry; | |
1113 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1114 | } | |
1115 | ||
af1cbba3 BZ |
1116 | ide_ports[hwif->index] = hwif; |
1117 | ||
1da177e4 LT |
1118 | /* |
1119 | * Allocate the irq, if not already obtained for another hwif | |
1120 | */ | |
1121 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1122 | int sa = 0; |
7b892806 | 1123 | #if defined(__mc68000__) |
362537b9 | 1124 | sa = IRQF_SHARED; |
e1771e20 | 1125 | #endif /* __mc68000__ */ |
1da177e4 | 1126 | |
6b5cde36 | 1127 | if (hwif->chipset == ide_pci) |
362537b9 | 1128 | sa = IRQF_SHARED; |
1da177e4 | 1129 | |
4c3032d8 | 1130 | if (io_ports->ctl_addr) |
374e042c | 1131 | hwif->tp_ops->set_irq(hwif, 1); |
1da177e4 LT |
1132 | |
1133 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1134 | goto out_unlink; | |
1135 | } | |
1136 | ||
8a0e7e14 BZ |
1137 | if (!hwif->rqsize) { |
1138 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1139 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1140 | hwif->rqsize = 256; | |
1141 | else | |
1142 | hwif->rqsize = 65536; | |
1143 | } | |
1144 | ||
7b892806 | 1145 | #if !defined(__mc68000__) |
1b8ebad8 | 1146 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1147 | io_ports->data_addr, io_ports->status_addr, |
1148 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1149 | #else |
1b8ebad8 | 1150 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1151 | io_ports->data_addr, hwif->irq); |
7b892806 | 1152 | #endif /* __mc68000__ */ |
1da177e4 | 1153 | if (match) |
f58c1ab8 | 1154 | printk(KERN_CONT " (serialized with %s)", match->name); |
1b8ebad8 | 1155 | printk(KERN_CONT "\n"); |
d5bc6592 | 1156 | |
ef29888e | 1157 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1158 | return 0; |
1159 | out_unlink: | |
fbd13088 | 1160 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1161 | out_up: |
ef29888e | 1162 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1163 | return 1; |
1164 | } | |
1165 | ||
1166 | static int ata_lock(dev_t dev, void *data) | |
1167 | { | |
1168 | /* FIXME: we want to pin hwif down */ | |
1169 | return 0; | |
1170 | } | |
1171 | ||
1172 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1173 | { | |
1174 | ide_hwif_t *hwif = data; | |
1175 | int unit = *part >> PARTN_BITS; | |
1176 | ide_drive_t *drive = &hwif->drives[unit]; | |
97100fc8 BZ |
1177 | |
1178 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) | |
1da177e4 LT |
1179 | return NULL; |
1180 | ||
1181 | if (drive->media == ide_disk) | |
1182 | request_module("ide-disk"); | |
97100fc8 | 1183 | if (drive->dev_flags & IDE_DFLAG_SCSI) |
1da177e4 LT |
1184 | request_module("ide-scsi"); |
1185 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1186 | request_module("ide-cd"); | |
1187 | if (drive->media == ide_tape) | |
1188 | request_module("ide-tape"); | |
1189 | if (drive->media == ide_floppy) | |
1190 | request_module("ide-floppy"); | |
1191 | ||
1192 | return NULL; | |
1193 | } | |
1194 | ||
1195 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1196 | { | |
1197 | struct gendisk *p = data; | |
1198 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1199 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | static int exact_lock(dev_t dev, void *data) | |
1203 | { | |
1204 | struct gendisk *p = data; | |
1205 | ||
1206 | if (!get_disk(p)) | |
1207 | return -1; | |
1208 | return 0; | |
1209 | } | |
1210 | ||
1211 | void ide_register_region(struct gendisk *disk) | |
1212 | { | |
1213 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1214 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1215 | } | |
1216 | ||
1217 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1218 | ||
1219 | void ide_unregister_region(struct gendisk *disk) | |
1220 | { | |
1221 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1222 | disk->minors); | |
1223 | } | |
1224 | ||
1225 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1226 | ||
1227 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1228 | { | |
1229 | ide_hwif_t *hwif = drive->hwif; | |
7f612f27 | 1230 | unsigned int unit = drive->dn & 1; |
1da177e4 LT |
1231 | |
1232 | disk->major = hwif->major; | |
1233 | disk->first_minor = unit << PARTN_BITS; | |
1234 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1235 | disk->queue = drive->queue; | |
1236 | } | |
1237 | ||
1238 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1239 | ||
8604affd BZ |
1240 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1241 | { | |
1242 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1243 | ||
1244 | if (drive == drive->next) { | |
1245 | /* special case: last drive from hwgroup. */ | |
1246 | BUG_ON(hwgroup->drive != drive); | |
1247 | hwgroup->drive = NULL; | |
1248 | } else { | |
1249 | ide_drive_t *walk; | |
1250 | ||
1251 | walk = hwgroup->drive; | |
1252 | while (walk->next != drive) | |
1253 | walk = walk->next; | |
1254 | walk->next = drive->next; | |
1255 | if (hwgroup->drive == drive) { | |
1256 | hwgroup->drive = drive->next; | |
1257 | hwgroup->hwif = hwgroup->drive->hwif; | |
1258 | } | |
1259 | } | |
1260 | BUG_ON(hwgroup->drive == drive); | |
1261 | } | |
1262 | ||
1da177e4 LT |
1263 | static void drive_release_dev (struct device *dev) |
1264 | { | |
1265 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
2a2ca6a9 | 1266 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; |
1da177e4 | 1267 | |
5b0c4b30 BZ |
1268 | ide_proc_unregister_device(drive); |
1269 | ||
2a2ca6a9 | 1270 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1271 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1272 | kfree(drive->id); |
1273 | drive->id = NULL; | |
97100fc8 | 1274 | drive->dev_flags &= ~IDE_DFLAG_PRESENT; |
8604affd | 1275 | /* Messed up locking ... */ |
2a2ca6a9 | 1276 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1277 | blk_cleanup_queue(drive->queue); |
2a2ca6a9 | 1278 | spin_lock_irq(&hwgroup->lock); |
8604affd | 1279 | drive->queue = NULL; |
2a2ca6a9 | 1280 | spin_unlock_irq(&hwgroup->lock); |
8604affd | 1281 | |
f36d4024 | 1282 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1283 | } |
1284 | ||
1da177e4 LT |
1285 | static int hwif_init(ide_hwif_t *hwif) |
1286 | { | |
1287 | int old_irq; | |
1288 | ||
1da177e4 | 1289 | if (!hwif->irq) { |
a861beb1 | 1290 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1291 | if (!hwif->irq) { |
1b8ebad8 | 1292 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1293 | return 0; |
1da177e4 LT |
1294 | } |
1295 | } | |
1da177e4 | 1296 | |
1da177e4 LT |
1297 | if (register_blkdev(hwif->major, hwif->name)) |
1298 | return 0; | |
1299 | ||
1300 | if (!hwif->sg_max_nents) | |
1301 | hwif->sg_max_nents = PRD_ENTRIES; | |
1302 | ||
45711f1a | 1303 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1304 | GFP_KERNEL); |
1305 | if (!hwif->sg_table) { | |
1306 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1307 | goto out; | |
1308 | } | |
45711f1a JA |
1309 | |
1310 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1311 | |
1312 | if (init_irq(hwif) == 0) | |
1313 | goto done; | |
1314 | ||
1315 | old_irq = hwif->irq; | |
1316 | /* | |
1317 | * It failed to initialise. Find the default IRQ for | |
1318 | * this port and try that. | |
1319 | */ | |
a861beb1 | 1320 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1321 | if (!hwif->irq) { |
1b8ebad8 | 1322 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1323 | hwif->name, old_irq); |
1324 | goto out; | |
1325 | } | |
1326 | if (init_irq(hwif)) { | |
1b8ebad8 | 1327 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1328 | hwif->name, old_irq, hwif->irq); |
1329 | goto out; | |
1330 | } | |
1b8ebad8 | 1331 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1332 | hwif->name, hwif->irq); |
1333 | ||
1334 | done: | |
3a4e7c96 BZ |
1335 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1336 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1337 | return 1; |
1338 | ||
1339 | out: | |
1340 | unregister_blkdev(hwif->major, hwif->name); | |
1341 | return 0; | |
1342 | } | |
1343 | ||
9601a607 BZ |
1344 | static void hwif_register_devices(ide_hwif_t *hwif) |
1345 | { | |
1346 | unsigned int i; | |
1347 | ||
1348 | for (i = 0; i < MAX_DRIVES; i++) { | |
1349 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1350 | struct device *dev = &drive->gendev; |
1351 | int ret; | |
9601a607 | 1352 | |
97100fc8 | 1353 | if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0) |
c5d70cc7 | 1354 | continue; |
9601a607 | 1355 | |
c5d70cc7 BZ |
1356 | snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); |
1357 | dev->parent = &hwif->gendev; | |
1358 | dev->bus = &ide_bus_type; | |
1359 | dev->driver_data = drive; | |
1360 | dev->release = drive_release_dev; | |
1361 | ||
1362 | ret = device_register(dev); | |
1363 | if (ret < 0) | |
1364 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1365 | "%d\n", __func__, ret); | |
9601a607 BZ |
1366 | } |
1367 | } | |
1368 | ||
7704ca2a BZ |
1369 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1370 | { | |
ac95beed | 1371 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1372 | int i; |
1373 | ||
1374 | for (i = 0; i < MAX_DRIVES; i++) { | |
1375 | ide_drive_t *drive = &hwif->drives[i]; | |
1376 | ||
123995b9 BZ |
1377 | drive->dn = i + hwif->channel * 2; |
1378 | ||
7704ca2a BZ |
1379 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) |
1380 | drive->io_32bit = 1; | |
1381 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
97100fc8 | 1382 | drive->dev_flags |= IDE_DFLAG_UNMASK; |
807b90d0 | 1383 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
97100fc8 | 1384 | drive->dev_flags |= IDE_DFLAG_NO_UNMASK; |
1f2cf8b0 | 1385 | |
e6d95bd1 BZ |
1386 | if (port_ops && port_ops->init_dev) |
1387 | port_ops->init_dev(drive); | |
1388 | } | |
7704ca2a BZ |
1389 | } |
1390 | ||
c413b9b9 BZ |
1391 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1392 | const struct ide_port_info *d) | |
8447d9d5 | 1393 | { |
b7691646 | 1394 | hwif->channel = port; |
c413b9b9 BZ |
1395 | |
1396 | if (d->chipset) | |
1397 | hwif->chipset = d->chipset; | |
1398 | ||
1399 | if (d->init_iops) | |
1400 | d->init_iops(hwif); | |
1401 | ||
c413b9b9 BZ |
1402 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1403 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1404 | hwif->irq = port ? 15 : 14; | |
1405 | ||
23f8e4bf BZ |
1406 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1407 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1408 | hwif->pio_mask = d->pio_mask; |
1409 | ||
374e042c BZ |
1410 | if (d->tp_ops) |
1411 | hwif->tp_ops = d->tp_ops; | |
1412 | ||
ac95beed BZ |
1413 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1414 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1415 | hwif->port_ops = d->port_ops; | |
1416 | ||
c413b9b9 BZ |
1417 | hwif->swdma_mask = d->swdma_mask; |
1418 | hwif->mwdma_mask = d->mwdma_mask; | |
1419 | hwif->ultra_mask = d->udma_mask; | |
1420 | ||
b123f56e BZ |
1421 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1422 | int rc; | |
1423 | ||
1424 | if (d->init_dma) | |
1425 | rc = d->init_dma(hwif, d); | |
1426 | else | |
1427 | rc = ide_hwif_setup_dma(hwif, d); | |
1428 | ||
1429 | if (rc < 0) { | |
1430 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1431 | hwif->dma_base = 0; |
b123f56e BZ |
1432 | hwif->swdma_mask = 0; |
1433 | hwif->mwdma_mask = 0; | |
1434 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1435 | } else if (d->dma_ops) |
1436 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1437 | } |
c413b9b9 | 1438 | |
1024c5f4 BZ |
1439 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
1440 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { | |
1441 | if (hwif->mate) | |
1442 | hwif->mate->serialized = hwif->serialized = 1; | |
1443 | } | |
1444 | ||
6b492496 BZ |
1445 | if (d->max_sectors) |
1446 | hwif->rqsize = d->max_sectors; | |
c413b9b9 BZ |
1447 | |
1448 | /* call chipset specific routine for each enabled port */ | |
1449 | if (d->init_hwif) | |
1450 | d->init_hwif(hwif); | |
c7f6f21a | 1451 | } |
bfa14b42 | 1452 | |
c7f6f21a BZ |
1453 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1454 | { | |
ac95beed BZ |
1455 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1456 | ||
1457 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1458 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1459 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1460 | } |
c413b9b9 BZ |
1461 | } |
1462 | ||
f74c9141 BZ |
1463 | static ssize_t store_delete_devices(struct device *portdev, |
1464 | struct device_attribute *attr, | |
1465 | const char *buf, size_t n) | |
1466 | { | |
1467 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1468 | ||
1469 | if (strncmp(buf, "1", n)) | |
1470 | return -EINVAL; | |
1471 | ||
1472 | ide_port_unregister_devices(hwif); | |
1473 | ||
1474 | return n; | |
1475 | }; | |
1476 | ||
1477 | static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); | |
1478 | ||
1479 | static ssize_t store_scan(struct device *portdev, | |
1480 | struct device_attribute *attr, | |
1481 | const char *buf, size_t n) | |
1482 | { | |
1483 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1484 | ||
1485 | if (strncmp(buf, "1", n)) | |
1486 | return -EINVAL; | |
1487 | ||
1488 | ide_port_unregister_devices(hwif); | |
1489 | ide_port_scan(hwif); | |
1490 | ||
1491 | return n; | |
1492 | }; | |
1493 | ||
1494 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
1495 | ||
1496 | static struct device_attribute *ide_port_attrs[] = { | |
1497 | &dev_attr_delete_devices, | |
1498 | &dev_attr_scan, | |
1499 | NULL | |
1500 | }; | |
1501 | ||
1502 | static int ide_sysfs_register_port(ide_hwif_t *hwif) | |
1503 | { | |
ca09a237 | 1504 | int i, uninitialized_var(rc); |
f74c9141 BZ |
1505 | |
1506 | for (i = 0; ide_port_attrs[i]; i++) { | |
1507 | rc = device_create_file(hwif->portdev, ide_port_attrs[i]); | |
1508 | if (rc) | |
1509 | break; | |
1510 | } | |
1511 | ||
1512 | return rc; | |
1513 | } | |
1514 | ||
8cdf3100 BZ |
1515 | static unsigned int ide_indexes; |
1516 | ||
fe80b937 | 1517 | /** |
8cdf3100 | 1518 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1519 | * @d: IDE port info |
1520 | * | |
8cdf3100 | 1521 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1522 | */ |
1523 | ||
8cdf3100 | 1524 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1525 | { |
8cdf3100 | 1526 | int idx = -ENOENT; |
fe80b937 | 1527 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1528 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1529 | |
1530 | /* | |
1531 | * Claim an unassigned slot. | |
1532 | * | |
1533 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1534 | * just in case there's another interface yet-to-be-scanned | |
1535 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1536 | * | |
1537 | * Unless there is a bootable card that does not use the standard | |
1538 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1539 | */ | |
8cdf3100 | 1540 | mutex_lock(&ide_cfg_mtx); |
75d21fff BZ |
1541 | if (bootable) { |
1542 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1543 | idx = ffz(ide_indexes | i); | |
fe80b937 | 1544 | } else { |
75d21fff BZ |
1545 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) |
1546 | idx = ffz(ide_indexes | 3); | |
1547 | else if ((ide_indexes & 3) != 3) | |
1548 | idx = ffz(ide_indexes); | |
fe80b937 | 1549 | } |
8cdf3100 BZ |
1550 | if (idx >= 0) |
1551 | ide_indexes |= (1 << idx); | |
1552 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1553 | |
8cdf3100 BZ |
1554 | return idx; |
1555 | } | |
256c5f8e | 1556 | |
8cdf3100 BZ |
1557 | static void ide_free_port_slot(int idx) |
1558 | { | |
1559 | mutex_lock(&ide_cfg_mtx); | |
1560 | ide_indexes &= ~(1 << idx); | |
1561 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1562 | } |
fe80b937 | 1563 | |
a36223b0 | 1564 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) |
48c3c107 BZ |
1565 | { |
1566 | struct ide_host *host; | |
1567 | int i; | |
1568 | ||
1569 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1570 | if (host == NULL) | |
1571 | return NULL; | |
1572 | ||
a36223b0 | 1573 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
48c3c107 | 1574 | ide_hwif_t *hwif; |
8cdf3100 | 1575 | int idx; |
48c3c107 BZ |
1576 | |
1577 | if (hws[i] == NULL) | |
1578 | continue; | |
1579 | ||
18de1017 BZ |
1580 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1581 | if (hwif == NULL) | |
1582 | continue; | |
1583 | ||
8cdf3100 BZ |
1584 | idx = ide_find_port_slot(d); |
1585 | if (idx < 0) { | |
1586 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1587 | d ? d->name : "ide"); | |
18de1017 | 1588 | kfree(hwif); |
8cdf3100 | 1589 | continue; |
48c3c107 | 1590 | } |
8cdf3100 | 1591 | |
8cdf3100 BZ |
1592 | ide_init_port_data(hwif, idx); |
1593 | ||
08da591e BZ |
1594 | hwif->host = host; |
1595 | ||
8cdf3100 BZ |
1596 | host->ports[i] = hwif; |
1597 | host->n_ports++; | |
48c3c107 BZ |
1598 | } |
1599 | ||
1600 | if (host->n_ports == 0) { | |
1601 | kfree(host); | |
1602 | return NULL; | |
1603 | } | |
1604 | ||
6cdf6eb3 BZ |
1605 | if (hws[0]) |
1606 | host->dev[0] = hws[0]->dev; | |
1607 | ||
feb22b7f BZ |
1608 | if (d) { |
1609 | host->init_chipset = d->init_chipset; | |
ef0b0427 | 1610 | host->host_flags = d->host_flags; |
feb22b7f | 1611 | } |
ef0b0427 | 1612 | |
48c3c107 BZ |
1613 | return host; |
1614 | } | |
48c3c107 BZ |
1615 | EXPORT_SYMBOL_GPL(ide_host_alloc); |
1616 | ||
1617 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1618 | hw_regs_t **hws) | |
c413b9b9 BZ |
1619 | { |
1620 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1621 | int i, j = 0; |
8447d9d5 | 1622 | |
a36223b0 | 1623 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1624 | hwif = host->ports[i]; |
48c3c107 | 1625 | |
e0d00207 | 1626 | if (hwif == NULL) { |
c413b9b9 BZ |
1627 | mate = NULL; |
1628 | continue; | |
1629 | } | |
1630 | ||
c97c6aca | 1631 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1632 | ide_port_apply_params(hwif); |
1633 | ||
1634 | if (d == NULL) { | |
1635 | mate = NULL; | |
123995b9 BZ |
1636 | } else { |
1637 | if ((i & 1) && mate) { | |
1638 | hwif->mate = mate; | |
1639 | mate->mate = hwif; | |
1640 | } | |
9fd91d95 | 1641 | |
123995b9 | 1642 | mate = (i & 1) ? NULL : hwif; |
c413b9b9 | 1643 | |
123995b9 BZ |
1644 | ide_init_port(hwif, i & 1, d); |
1645 | ide_port_cable_detect(hwif); | |
1646 | } | |
c413b9b9 | 1647 | |
7704ca2a | 1648 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1649 | } |
1650 | ||
a36223b0 | 1651 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1652 | hwif = host->ports[i]; |
ba6560aa | 1653 | |
e0d00207 BZ |
1654 | if (hwif == NULL) |
1655 | continue; | |
139ddfca | 1656 | |
eb716beb BZ |
1657 | if (ide_probe_port(hwif) == 0) |
1658 | hwif->present = 1; | |
a14dc574 BZ |
1659 | |
1660 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1661 | !hwif->mate->present) | |
1662 | ide_register_port(hwif); | |
1663 | ||
eb716beb BZ |
1664 | if (hwif->present) |
1665 | ide_port_tune_devices(hwif); | |
2e13093a | 1666 | } |
ba6560aa | 1667 | |
a36223b0 | 1668 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1669 | hwif = host->ports[i]; |
2e13093a | 1670 | |
e0d00207 BZ |
1671 | if (hwif == NULL) |
1672 | continue; | |
ba6560aa BZ |
1673 | |
1674 | if (hwif_init(hwif) == 0) { | |
1675 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1676 | "interface\n", hwif->name); | |
48535651 | 1677 | hwif->present = 0; |
ba6560aa BZ |
1678 | continue; |
1679 | } | |
decdc3f0 | 1680 | |
eb716beb | 1681 | if (hwif->present) |
e415e495 EO |
1682 | if (ide_port_setup_devices(hwif) == 0) { |
1683 | hwif->present = 0; | |
1684 | continue; | |
1685 | } | |
1686 | ||
1687 | j++; | |
26042d05 | 1688 | |
decdc3f0 | 1689 | ide_acpi_init(hwif); |
eb716beb BZ |
1690 | |
1691 | if (hwif->present) | |
1692 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1693 | } |
1694 | ||
a36223b0 | 1695 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1696 | hwif = host->ports[i]; |
2e13093a | 1697 | |
e0d00207 BZ |
1698 | if (hwif == NULL) |
1699 | continue; | |
ba6560aa | 1700 | |
eb716beb BZ |
1701 | if (hwif->chipset == ide_unknown) |
1702 | hwif->chipset = ide_generic; | |
1703 | ||
1704 | if (hwif->present) | |
ba6560aa | 1705 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1706 | } |
1707 | ||
a36223b0 | 1708 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
e0d00207 | 1709 | hwif = host->ports[i]; |
327617e1 | 1710 | |
e0d00207 BZ |
1711 | if (hwif == NULL) |
1712 | continue; | |
327617e1 | 1713 | |
eb716beb BZ |
1714 | ide_sysfs_register_port(hwif); |
1715 | ide_proc_register_port(hwif); | |
1716 | ||
1717 | if (hwif->present) | |
d9270a3f | 1718 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1719 | } |
1720 | ||
e0d00207 | 1721 | return j ? 0 : -1; |
8447d9d5 | 1722 | } |
48c3c107 | 1723 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1724 | |
6f904d01 BZ |
1725 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1726 | struct ide_host **hostp) | |
1727 | { | |
1728 | struct ide_host *host; | |
8a69580e | 1729 | int rc; |
6f904d01 BZ |
1730 | |
1731 | host = ide_host_alloc(d, hws); | |
1732 | if (host == NULL) | |
1733 | return -ENOMEM; | |
1734 | ||
8a69580e BZ |
1735 | rc = ide_host_register(host, d, hws); |
1736 | if (rc) { | |
1737 | ide_host_free(host); | |
1738 | return rc; | |
1739 | } | |
6f904d01 BZ |
1740 | |
1741 | if (hostp) | |
1742 | *hostp = host; | |
1743 | ||
1744 | return 0; | |
1745 | } | |
1746 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1747 | ||
8a69580e | 1748 | void ide_host_free(struct ide_host *host) |
151575e4 | 1749 | { |
8cdf3100 | 1750 | ide_hwif_t *hwif; |
151575e4 | 1751 | int i; |
8447d9d5 | 1752 | |
a36223b0 | 1753 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8cdf3100 BZ |
1754 | hwif = host->ports[i]; |
1755 | ||
1756 | if (hwif == NULL) | |
1757 | continue; | |
1758 | ||
8cdf3100 | 1759 | ide_free_port_slot(hwif->index); |
18de1017 | 1760 | kfree(hwif); |
c97c6aca | 1761 | } |
151575e4 | 1762 | |
48c3c107 | 1763 | kfree(host); |
151575e4 | 1764 | } |
8a69580e BZ |
1765 | EXPORT_SYMBOL_GPL(ide_host_free); |
1766 | ||
1767 | void ide_host_remove(struct ide_host *host) | |
1768 | { | |
1769 | int i; | |
1770 | ||
a36223b0 | 1771 | for (i = 0; i < MAX_HOST_PORTS; i++) { |
8a69580e BZ |
1772 | if (host->ports[i]) |
1773 | ide_unregister(host->ports[i]); | |
1774 | } | |
1775 | ||
1776 | ide_host_free(host); | |
1777 | } | |
48c3c107 | 1778 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1779 | |
1780 | void ide_port_scan(ide_hwif_t *hwif) | |
1781 | { | |
9fd91d95 | 1782 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1783 | ide_port_cable_detect(hwif); |
1784 | ide_port_init_devices(hwif); | |
1785 | ||
1786 | if (ide_probe_port(hwif) < 0) | |
1787 | return; | |
1788 | ||
1789 | hwif->present = 1; | |
1790 | ||
1791 | ide_port_tune_devices(hwif); | |
1792 | ide_acpi_port_init_devices(hwif); | |
1793 | ide_port_setup_devices(hwif); | |
1794 | hwif_register_devices(hwif); | |
1795 | ide_proc_port_register_devices(hwif); | |
1796 | } | |
1797 | EXPORT_SYMBOL_GPL(ide_port_scan); | |
3b36f66b | 1798 | |
48c3c107 | 1799 | static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, |
c97c6aca | 1800 | u8 port_no, const struct ide_port_info *d, |
d9b819a0 | 1801 | unsigned long config) |
3b36f66b | 1802 | { |
d9b819a0 BZ |
1803 | unsigned long base, ctl; |
1804 | int irq; | |
3b36f66b | 1805 | |
d9b819a0 BZ |
1806 | if (port_no == 0) { |
1807 | base = 0x1f0; | |
1808 | ctl = 0x3f6; | |
1809 | irq = 14; | |
1810 | } else { | |
1811 | base = 0x170; | |
1812 | ctl = 0x376; | |
1813 | irq = 15; | |
1814 | } | |
3b36f66b | 1815 | |
d92f1a28 BZ |
1816 | if (!request_region(base, 8, d->name)) { |
1817 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
1818 | d->name, base, base + 7); | |
1819 | return; | |
1820 | } | |
1821 | ||
1822 | if (!request_region(ctl, 1, d->name)) { | |
1823 | printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", | |
1824 | d->name, ctl); | |
1825 | release_region(base, 8); | |
1826 | return; | |
1827 | } | |
1828 | ||
d9b819a0 BZ |
1829 | ide_std_init_ports(hw, base, ctl); |
1830 | hw->irq = irq; | |
d427e836 | 1831 | hw->chipset = d->chipset; |
d6276b5f | 1832 | hw->config = config; |
3b36f66b | 1833 | |
48c3c107 | 1834 | hws[port_no] = hw; |
d9b819a0 | 1835 | } |
3b36f66b | 1836 | |
d9b819a0 BZ |
1837 | int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) |
1838 | { | |
c97c6aca | 1839 | hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; |
0bfeee7d | 1840 | |
d9b819a0 BZ |
1841 | memset(&hw, 0, sizeof(hw)); |
1842 | ||
1843 | if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) | |
48c3c107 BZ |
1844 | ide_legacy_init_one(hws, &hw[0], 0, d, config); |
1845 | ide_legacy_init_one(hws, &hw[1], 1, d, config); | |
d9b819a0 | 1846 | |
48c3c107 | 1847 | if (hws[0] == NULL && hws[1] == NULL && |
d9b819a0 BZ |
1848 | (d->host_flags & IDE_HFLAG_SINGLE)) |
1849 | return -ENOENT; | |
3b36f66b | 1850 | |
6f904d01 | 1851 | return ide_host_add(d, hws, NULL); |
3b36f66b BZ |
1852 | } |
1853 | EXPORT_SYMBOL_GPL(ide_legacy_device_add); |