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 */ | |
4dde4492 BZ |
72 | if ((id[ATA_ID_FIELD_VALID] & 1) && id[ATA_ID_CUR_CYLS] && |
73 | id[ATA_ID_CUR_HEADS] && id[ATA_ID_CUR_HEADS] <= 16 && | |
74 | id[ATA_ID_CUR_SECTORS]) { | |
75 | drive->cyl = id[ATA_ID_CUR_CYLS]; | |
76 | drive->head = id[ATA_ID_CUR_HEADS]; | |
77 | drive->sect = id[ATA_ID_CUR_SECTORS]; | |
1da177e4 LT |
78 | } |
79 | ||
80 | /* Use physical geometry if what we have still makes no sense */ | |
4dde4492 BZ |
81 | if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) { |
82 | drive->cyl = id[ATA_ID_CYLS]; | |
83 | drive->head = id[ATA_ID_HEADS]; | |
84 | drive->sect = id[ATA_ID_SECTORS]; | |
1da177e4 LT |
85 | } |
86 | } | |
87 | ||
88 | static void ide_disk_init_mult_count(ide_drive_t *drive) | |
89 | { | |
48fb2688 BZ |
90 | u16 *id = drive->id; |
91 | u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff; | |
1da177e4 | 92 | |
48fb2688 | 93 | if (max_multsect) { |
1da177e4 | 94 | #ifdef CONFIG_IDEDISK_MULTI_MODE |
48fb2688 BZ |
95 | if ((max_multsect / 2) > 1) |
96 | id[ATA_ID_MULTSECT] = max_multsect | 0x100; | |
97 | else | |
98 | id[ATA_ID_MULTSECT] &= ~0x1ff; | |
99 | ||
100 | drive->mult_req = id[ATA_ID_MULTSECT] & 0xff; | |
1da177e4 | 101 | #endif |
48fb2688 BZ |
102 | if ((id[ATA_ID_MULTSECT] & 0x100) && |
103 | (id[ATA_ID_MULTSECT] & 0xff)) | |
df1f8378 | 104 | drive->special.b.set_multmode = 1; |
1da177e4 LT |
105 | } |
106 | } | |
107 | ||
1da177e4 LT |
108 | /** |
109 | * do_identify - identify a drive | |
110 | * @drive: drive to identify | |
111 | * @cmd: command used | |
112 | * | |
113 | * Called when we have issued a drive identify command to | |
114 | * read and parse the results. This function is run with | |
115 | * interrupts disabled. | |
116 | */ | |
117 | ||
118 | static inline void do_identify (ide_drive_t *drive, u8 cmd) | |
119 | { | |
120 | ide_hwif_t *hwif = HWIF(drive); | |
4dde4492 BZ |
121 | u16 *id = drive->id; |
122 | char *m = (char *)&id[ATA_ID_PROD]; | |
1da177e4 | 123 | int bswap = 1; |
1da177e4 | 124 | |
1da177e4 | 125 | /* read 512 bytes of id info */ |
374e042c | 126 | hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE); |
1da177e4 LT |
127 | |
128 | drive->id_read = 1; | |
129 | local_irq_enable(); | |
7b9f25b5 BZ |
130 | #ifdef DEBUG |
131 | printk(KERN_INFO "%s: dumping identify data\n", drive->name); | |
132 | ide_dump_identify((u8 *)id); | |
133 | #endif | |
1da177e4 LT |
134 | ide_fix_driveid(id); |
135 | ||
1da177e4 LT |
136 | /* |
137 | * WIN_IDENTIFY returns little-endian info, | |
138 | * WIN_PIDENTIFY *usually* returns little-endian info. | |
139 | */ | |
140 | if (cmd == WIN_PIDENTIFY) { | |
4dde4492 BZ |
141 | if ((m[0] == 'N' && m[1] == 'E') || /* NEC */ |
142 | (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */ | |
143 | (m[0] == 'P' && m[1] == 'i')) /* Pioneer */ | |
1da177e4 | 144 | /* Vertos drives may still be weird */ |
4dde4492 | 145 | bswap ^= 1; |
1da177e4 | 146 | } |
4dde4492 BZ |
147 | |
148 | ide_fixstring(m, ATA_ID_PROD_LEN, bswap); | |
149 | ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap); | |
150 | ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap); | |
1da177e4 | 151 | |
699b052a | 152 | /* we depend on this a lot! */ |
4dde4492 | 153 | m[ATA_ID_PROD_LEN - 1] = '\0'; |
699b052a | 154 | |
4dde4492 | 155 | if (strstr(m, "E X A B Y T E N E S T")) |
1da177e4 LT |
156 | goto err_misc; |
157 | ||
4dde4492 | 158 | printk(KERN_INFO "%s: %s, ", drive->name, m); |
1b8ebad8 | 159 | |
1da177e4 LT |
160 | drive->present = 1; |
161 | drive->dead = 0; | |
162 | ||
163 | /* | |
164 | * Check for an ATAPI device | |
165 | */ | |
166 | if (cmd == WIN_PIDENTIFY) { | |
4dde4492 | 167 | u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f; |
1b8ebad8 BZ |
168 | |
169 | printk(KERN_CONT "ATAPI "); | |
1da177e4 LT |
170 | switch (type) { |
171 | case ide_floppy: | |
4dde4492 BZ |
172 | if (!strstr(m, "CD-ROM")) { |
173 | if (!strstr(m, "oppy") && | |
174 | !strstr(m, "poyp") && | |
175 | !strstr(m, "ZIP")) | |
1b8ebad8 | 176 | printk(KERN_CONT "cdrom or floppy?, assuming "); |
1da177e4 | 177 | if (drive->media != ide_cdrom) { |
1b8ebad8 | 178 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
179 | drive->removable = 1; |
180 | break; | |
181 | } | |
182 | } | |
183 | /* Early cdrom models used zero */ | |
184 | type = ide_cdrom; | |
185 | case ide_cdrom: | |
186 | drive->removable = 1; | |
187 | #ifdef CONFIG_PPC | |
188 | /* kludge for Apple PowerBook internal zip */ | |
4dde4492 | 189 | if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) { |
1b8ebad8 | 190 | printk(KERN_CONT "FLOPPY"); |
1da177e4 LT |
191 | type = ide_floppy; |
192 | break; | |
193 | } | |
194 | #endif | |
1b8ebad8 | 195 | printk(KERN_CONT "CD/DVD-ROM"); |
1da177e4 LT |
196 | break; |
197 | case ide_tape: | |
1b8ebad8 | 198 | printk(KERN_CONT "TAPE"); |
1da177e4 LT |
199 | break; |
200 | case ide_optical: | |
1b8ebad8 | 201 | printk(KERN_CONT "OPTICAL"); |
1da177e4 LT |
202 | drive->removable = 1; |
203 | break; | |
204 | default: | |
1b8ebad8 | 205 | printk(KERN_CONT "UNKNOWN (type %d)", type); |
1da177e4 LT |
206 | break; |
207 | } | |
1b8ebad8 | 208 | printk(KERN_CONT " drive\n"); |
1da177e4 LT |
209 | drive->media = type; |
210 | /* an ATAPI device ignores DRDY */ | |
211 | drive->ready_stat = 0; | |
212 | return; | |
213 | } | |
214 | ||
215 | /* | |
216 | * Not an ATAPI device: looks like a "regular" hard disk | |
217 | */ | |
98109337 RP |
218 | |
219 | /* | |
220 | * 0x848a = CompactFlash device | |
221 | * These are *not* removable in Linux definition of the term | |
222 | */ | |
4dde4492 | 223 | if (id[ATA_ID_CONFIG] != 0x848a && (id[ATA_ID_CONFIG] & (1 << 7))) |
1da177e4 LT |
224 | drive->removable = 1; |
225 | ||
1da177e4 | 226 | drive->media = ide_disk; |
1b8ebad8 BZ |
227 | |
228 | printk(KERN_CONT "%s DISK drive\n", | |
4dde4492 | 229 | (id[ATA_ID_CONFIG] == 0x848a) ? "CFA" : "ATA"); |
cd3dbc99 | 230 | |
1da177e4 LT |
231 | return; |
232 | ||
233 | err_misc: | |
234 | kfree(id); | |
235 | drive->present = 0; | |
236 | return; | |
237 | } | |
238 | ||
239 | /** | |
240 | * actual_try_to_identify - send ata/atapi identify | |
241 | * @drive: drive to identify | |
242 | * @cmd: command to use | |
243 | * | |
244 | * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive | |
245 | * and waits for a response. It also monitors irqs while this is | |
246 | * happening, in hope of automatically determining which one is | |
247 | * being used by the interface. | |
248 | * | |
249 | * Returns: 0 device was identified | |
250 | * 1 device timed-out (no response to identify request) | |
251 | * 2 device aborted the command (refused to identify itself) | |
252 | */ | |
253 | ||
254 | static int actual_try_to_identify (ide_drive_t *drive, u8 cmd) | |
255 | { | |
256 | ide_hwif_t *hwif = HWIF(drive); | |
4c3032d8 | 257 | struct ide_io_ports *io_ports = &hwif->io_ports; |
374e042c | 258 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
c47137a9 | 259 | int use_altstatus = 0, rc; |
1da177e4 LT |
260 | unsigned long timeout; |
261 | u8 s = 0, a = 0; | |
262 | ||
263 | /* take a deep breath */ | |
264 | msleep(50); | |
265 | ||
4c3032d8 | 266 | if (io_ports->ctl_addr) { |
374e042c BZ |
267 | a = tp_ops->read_altstatus(hwif); |
268 | s = tp_ops->read_status(hwif); | |
c47137a9 | 269 | if ((a ^ s) & ~INDEX_STAT) |
1da177e4 | 270 | /* ancient Seagate drives, broken interfaces */ |
c47137a9 BZ |
271 | printk(KERN_INFO "%s: probing with STATUS(0x%02x) " |
272 | "instead of ALTSTATUS(0x%02x)\n", | |
273 | drive->name, s, a); | |
274 | else | |
1da177e4 | 275 | /* use non-intrusive polling */ |
c47137a9 BZ |
276 | use_altstatus = 1; |
277 | } | |
1da177e4 LT |
278 | |
279 | /* set features register for atapi | |
280 | * identify command to be sure of reply | |
281 | */ | |
4e65837b BZ |
282 | if (cmd == WIN_PIDENTIFY) { |
283 | ide_task_t task; | |
284 | ||
285 | memset(&task, 0, sizeof(task)); | |
286 | /* disable DMA & overlap */ | |
287 | task.tf_flags = IDE_TFLAG_OUT_FEATURE; | |
288 | ||
374e042c | 289 | tp_ops->tf_load(drive, &task); |
4e65837b | 290 | } |
1da177e4 LT |
291 | |
292 | /* ask drive for ID */ | |
374e042c | 293 | tp_ops->exec_command(hwif, cmd); |
1da177e4 LT |
294 | |
295 | timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2; | |
296 | timeout += jiffies; | |
297 | do { | |
298 | if (time_after(jiffies, timeout)) { | |
299 | /* drive timed-out */ | |
300 | return 1; | |
301 | } | |
302 | /* give drive a breather */ | |
303 | msleep(50); | |
374e042c BZ |
304 | s = use_altstatus ? tp_ops->read_altstatus(hwif) |
305 | : tp_ops->read_status(hwif); | |
c47137a9 | 306 | } while (s & BUSY_STAT); |
1da177e4 LT |
307 | |
308 | /* wait for IRQ and DRQ_STAT */ | |
309 | msleep(50); | |
374e042c | 310 | s = tp_ops->read_status(hwif); |
c47137a9 BZ |
311 | |
312 | if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) { | |
1da177e4 LT |
313 | unsigned long flags; |
314 | ||
315 | /* local CPU only; some systems need this */ | |
316 | local_irq_save(flags); | |
317 | /* drive returned ID */ | |
318 | do_identify(drive, cmd); | |
319 | /* drive responded with ID */ | |
320 | rc = 0; | |
321 | /* clear drive IRQ */ | |
374e042c | 322 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
323 | local_irq_restore(flags); |
324 | } else { | |
325 | /* drive refused ID */ | |
326 | rc = 2; | |
327 | } | |
328 | return rc; | |
329 | } | |
330 | ||
331 | /** | |
332 | * try_to_identify - try to identify a drive | |
333 | * @drive: drive to probe | |
334 | * @cmd: command to use | |
335 | * | |
336 | * Issue the identify command and then do IRQ probing to | |
337 | * complete the identification when needed by finding the | |
338 | * IRQ the drive is attached to | |
339 | */ | |
340 | ||
341 | static int try_to_identify (ide_drive_t *drive, u8 cmd) | |
342 | { | |
343 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 344 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
1da177e4 LT |
345 | int retval; |
346 | int autoprobe = 0; | |
347 | unsigned long cookie = 0; | |
348 | ||
349 | /* | |
350 | * Disable device irq unless we need to | |
351 | * probe for it. Otherwise we'll get spurious | |
352 | * interrupts during the identify-phase that | |
353 | * the irq handler isn't expecting. | |
354 | */ | |
4c3032d8 | 355 | if (hwif->io_ports.ctl_addr) { |
1da177e4 LT |
356 | if (!hwif->irq) { |
357 | autoprobe = 1; | |
358 | cookie = probe_irq_on(); | |
1da177e4 | 359 | } |
374e042c | 360 | tp_ops->set_irq(hwif, autoprobe); |
1da177e4 LT |
361 | } |
362 | ||
363 | retval = actual_try_to_identify(drive, cmd); | |
364 | ||
365 | if (autoprobe) { | |
366 | int irq; | |
81ca6919 | 367 | |
374e042c | 368 | tp_ops->set_irq(hwif, 0); |
1da177e4 | 369 | /* clear drive IRQ */ |
374e042c | 370 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
371 | udelay(5); |
372 | irq = probe_irq_off(cookie); | |
373 | if (!hwif->irq) { | |
374 | if (irq > 0) { | |
375 | hwif->irq = irq; | |
376 | } else { | |
377 | /* Mmmm.. multiple IRQs.. | |
378 | * don't know which was ours | |
379 | */ | |
1b8ebad8 | 380 | printk(KERN_ERR "%s: IRQ probe failed (0x%lx)\n", |
1da177e4 LT |
381 | drive->name, cookie); |
382 | } | |
383 | } | |
384 | } | |
385 | return retval; | |
386 | } | |
387 | ||
3a5015cc BZ |
388 | static int ide_busy_sleep(ide_hwif_t *hwif) |
389 | { | |
390 | unsigned long timeout = jiffies + WAIT_WORSTCASE; | |
391 | u8 stat; | |
392 | ||
393 | do { | |
394 | msleep(50); | |
374e042c | 395 | stat = hwif->tp_ops->read_status(hwif); |
3a5015cc BZ |
396 | if ((stat & BUSY_STAT) == 0) |
397 | return 0; | |
398 | } while (time_before(jiffies, timeout)); | |
399 | ||
400 | return 1; | |
401 | } | |
1da177e4 | 402 | |
1f2efb82 BZ |
403 | static u8 ide_read_device(ide_drive_t *drive) |
404 | { | |
405 | ide_task_t task; | |
406 | ||
407 | memset(&task, 0, sizeof(task)); | |
408 | task.tf_flags = IDE_TFLAG_IN_DEVICE; | |
409 | ||
374e042c | 410 | drive->hwif->tp_ops->tf_read(drive, &task); |
1f2efb82 BZ |
411 | |
412 | return task.tf.device; | |
413 | } | |
414 | ||
1da177e4 LT |
415 | /** |
416 | * do_probe - probe an IDE device | |
417 | * @drive: drive to probe | |
418 | * @cmd: command to use | |
419 | * | |
420 | * do_probe() has the difficult job of finding a drive if it exists, | |
421 | * without getting hung up if it doesn't exist, without trampling on | |
422 | * ethernet cards, and without leaving any IRQs dangling to haunt us later. | |
423 | * | |
424 | * If a drive is "known" to exist (from CMOS or kernel parameters), | |
425 | * but does not respond right away, the probe will "hang in there" | |
426 | * for the maximum wait time (about 30 seconds), otherwise it will | |
427 | * exit much more quickly. | |
428 | * | |
429 | * Returns: 0 device was identified | |
430 | * 1 device timed-out (no response to identify request) | |
431 | * 2 device aborted the command (refused to identify itself) | |
432 | * 3 bad status from device (possible for ATAPI drives) | |
433 | * 4 probe was not attempted because failure was obvious | |
434 | */ | |
435 | ||
436 | static int do_probe (ide_drive_t *drive, u8 cmd) | |
437 | { | |
1da177e4 | 438 | ide_hwif_t *hwif = HWIF(drive); |
374e042c | 439 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 BZ |
440 | int rc; |
441 | u8 stat; | |
1da177e4 LT |
442 | |
443 | if (drive->present) { | |
444 | /* avoid waiting for inappropriate probes */ | |
445 | if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY)) | |
446 | return 4; | |
447 | } | |
448 | #ifdef DEBUG | |
1b8ebad8 | 449 | printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n", |
1da177e4 LT |
450 | drive->name, drive->present, drive->media, |
451 | (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI"); | |
452 | #endif | |
453 | ||
454 | /* needed for some systems | |
455 | * (e.g. crw9624 as drive0 with disk as slave) | |
456 | */ | |
457 | msleep(50); | |
458 | SELECT_DRIVE(drive); | |
459 | msleep(50); | |
1f2efb82 BZ |
460 | |
461 | if (ide_read_device(drive) != drive->select.all && !drive->present) { | |
1da177e4 LT |
462 | if (drive->select.b.unit != 0) { |
463 | /* exit with drive0 selected */ | |
464 | SELECT_DRIVE(&hwif->drives[0]); | |
465 | /* allow BUSY_STAT to assert & clear */ | |
466 | msleep(50); | |
467 | } | |
468 | /* no i/f present: mmm.. this should be a 4 -ml */ | |
469 | return 3; | |
470 | } | |
471 | ||
374e042c | 472 | stat = tp_ops->read_status(hwif); |
c47137a9 BZ |
473 | |
474 | if (OK_STAT(stat, READY_STAT, BUSY_STAT) || | |
1da177e4 LT |
475 | drive->present || cmd == WIN_PIDENTIFY) { |
476 | /* send cmd and wait */ | |
477 | if ((rc = try_to_identify(drive, cmd))) { | |
478 | /* failed: try again */ | |
479 | rc = try_to_identify(drive,cmd); | |
480 | } | |
57b55275 | 481 | |
374e042c | 482 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
483 | |
484 | if (stat == (BUSY_STAT | READY_STAT)) | |
1da177e4 LT |
485 | return 4; |
486 | ||
cc12175f | 487 | if (rc == 1 && cmd == WIN_PIDENTIFY) { |
57b55275 BZ |
488 | printk(KERN_ERR "%s: no response (status = 0x%02x), " |
489 | "resetting drive\n", drive->name, stat); | |
1da177e4 | 490 | msleep(50); |
e81a3bde | 491 | SELECT_DRIVE(drive); |
1da177e4 | 492 | msleep(50); |
374e042c | 493 | tp_ops->exec_command(hwif, WIN_SRST); |
3a5015cc | 494 | (void)ide_busy_sleep(hwif); |
1da177e4 LT |
495 | rc = try_to_identify(drive, cmd); |
496 | } | |
57b55275 BZ |
497 | |
498 | /* ensure drive IRQ is clear */ | |
374e042c | 499 | stat = tp_ops->read_status(hwif); |
57b55275 | 500 | |
1da177e4 | 501 | if (rc == 1) |
57b55275 BZ |
502 | printk(KERN_ERR "%s: no response (status = 0x%02x)\n", |
503 | drive->name, stat); | |
1da177e4 LT |
504 | } else { |
505 | /* not present or maybe ATAPI */ | |
506 | rc = 3; | |
507 | } | |
508 | if (drive->select.b.unit != 0) { | |
509 | /* exit with drive0 selected */ | |
510 | SELECT_DRIVE(&hwif->drives[0]); | |
511 | msleep(50); | |
512 | /* ensure drive irq is clear */ | |
374e042c | 513 | (void)tp_ops->read_status(hwif); |
1da177e4 LT |
514 | } |
515 | return rc; | |
516 | } | |
517 | ||
518 | /* | |
519 | * | |
520 | */ | |
521 | static void enable_nest (ide_drive_t *drive) | |
522 | { | |
523 | ide_hwif_t *hwif = HWIF(drive); | |
374e042c | 524 | const struct ide_tp_ops *tp_ops = hwif->tp_ops; |
57b55275 | 525 | u8 stat; |
1da177e4 | 526 | |
4dde4492 BZ |
527 | printk(KERN_INFO "%s: enabling %s -- ", |
528 | hwif->name, (char *)&drive->id[ATA_ID_PROD]); | |
1b8ebad8 | 529 | |
1da177e4 LT |
530 | SELECT_DRIVE(drive); |
531 | msleep(50); | |
374e042c | 532 | tp_ops->exec_command(hwif, EXABYTE_ENABLE_NEST); |
3a5015cc BZ |
533 | |
534 | if (ide_busy_sleep(hwif)) { | |
535 | printk(KERN_CONT "failed (timeout)\n"); | |
536 | return; | |
537 | } | |
1da177e4 LT |
538 | |
539 | msleep(50); | |
540 | ||
374e042c | 541 | stat = tp_ops->read_status(hwif); |
57b55275 BZ |
542 | |
543 | if (!OK_STAT(stat, 0, BAD_STAT)) | |
544 | printk(KERN_CONT "failed (status = 0x%02x)\n", stat); | |
545 | else | |
546 | printk(KERN_CONT "success\n"); | |
1da177e4 LT |
547 | |
548 | /* if !(success||timed-out) */ | |
549 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
550 | /* look for ATAPI device */ | |
551 | (void) do_probe(drive, WIN_PIDENTIFY); | |
552 | } | |
553 | } | |
554 | ||
555 | /** | |
556 | * probe_for_drives - upper level drive probe | |
557 | * @drive: drive to probe for | |
558 | * | |
559 | * probe_for_drive() tests for existence of a given drive using do_probe() | |
560 | * and presents things to the user as needed. | |
561 | * | |
562 | * Returns: 0 no device was found | |
563 | * 1 device was found (note: drive->present might | |
564 | * still be 0) | |
565 | */ | |
566 | ||
567 | static inline u8 probe_for_drive (ide_drive_t *drive) | |
568 | { | |
4dde4492 BZ |
569 | char *m; |
570 | ||
1da177e4 LT |
571 | /* |
572 | * In order to keep things simple we have an id | |
573 | * block for all drives at all times. If the device | |
574 | * is pre ATA or refuses ATA/ATAPI identify we | |
575 | * will add faked data to this. | |
576 | * | |
577 | * Also note that 0 everywhere means "can't do X" | |
578 | */ | |
579 | ||
f5e3c2fa | 580 | drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL); |
1da177e4 LT |
581 | drive->id_read = 0; |
582 | if(drive->id == NULL) | |
583 | { | |
584 | printk(KERN_ERR "ide: out of memory for id data.\n"); | |
585 | return 0; | |
586 | } | |
4dde4492 BZ |
587 | |
588 | m = (char *)&drive->id[ATA_ID_PROD]; | |
589 | strcpy(m, "UNKNOWN"); | |
590 | ||
1da177e4 LT |
591 | /* skip probing? */ |
592 | if (!drive->noprobe) | |
593 | { | |
594 | /* if !(success||timed-out) */ | |
595 | if (do_probe(drive, WIN_IDENTIFY) >= 2) { | |
596 | /* look for ATAPI device */ | |
597 | (void) do_probe(drive, WIN_PIDENTIFY); | |
598 | } | |
1da177e4 LT |
599 | if (!drive->present) |
600 | /* drive not found */ | |
601 | return 0; | |
4dde4492 BZ |
602 | |
603 | if (strstr(m, "E X A B Y T E N E S T")) | |
78595575 | 604 | enable_nest(drive); |
1da177e4 LT |
605 | |
606 | /* identification failed? */ | |
607 | if (!drive->id_read) { | |
608 | if (drive->media == ide_disk) { | |
609 | printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n", | |
610 | drive->name, drive->cyl, | |
611 | drive->head, drive->sect); | |
612 | } else if (drive->media == ide_cdrom) { | |
613 | printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name); | |
614 | } else { | |
615 | /* nuke it */ | |
616 | printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name); | |
617 | drive->present = 0; | |
618 | } | |
619 | } | |
620 | /* drive was found */ | |
621 | } | |
622 | if(!drive->present) | |
623 | return 0; | |
624 | /* The drive wasn't being helpful. Add generic info only */ | |
625 | if (drive->id_read == 0) { | |
626 | generic_id(drive); | |
627 | return 1; | |
628 | } | |
629 | ||
630 | if (drive->media == ide_disk) { | |
631 | ide_disk_init_chs(drive); | |
632 | ide_disk_init_mult_count(drive); | |
633 | } | |
634 | ||
635 | return drive->present; | |
636 | } | |
637 | ||
fc410698 | 638 | static void hwif_release_dev(struct device *dev) |
1da177e4 LT |
639 | { |
640 | ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev); | |
641 | ||
f36d4024 | 642 | complete(&hwif->gendev_rel_comp); |
1da177e4 LT |
643 | } |
644 | ||
f74c9141 | 645 | static int ide_register_port(ide_hwif_t *hwif) |
1da177e4 | 646 | { |
349ae23f RD |
647 | int ret; |
648 | ||
1da177e4 LT |
649 | /* register with global device tree */ |
650 | strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE); | |
651 | hwif->gendev.driver_data = hwif; | |
652 | if (hwif->gendev.parent == NULL) { | |
36501650 BZ |
653 | if (hwif->dev) |
654 | hwif->gendev.parent = hwif->dev; | |
1da177e4 LT |
655 | else |
656 | /* Would like to do = &device_legacy */ | |
657 | hwif->gendev.parent = NULL; | |
658 | } | |
659 | hwif->gendev.release = hwif_release_dev; | |
349ae23f | 660 | ret = device_register(&hwif->gendev); |
f74c9141 | 661 | if (ret < 0) { |
349ae23f | 662 | printk(KERN_WARNING "IDE: %s: device_register error: %d\n", |
eb63963a | 663 | __func__, ret); |
f74c9141 BZ |
664 | goto out; |
665 | } | |
666 | ||
716ad875 GKH |
667 | hwif->portdev = device_create_drvdata(ide_port_class, &hwif->gendev, |
668 | MKDEV(0, 0), hwif, hwif->name); | |
f74c9141 BZ |
669 | if (IS_ERR(hwif->portdev)) { |
670 | ret = PTR_ERR(hwif->portdev); | |
671 | device_unregister(&hwif->gendev); | |
672 | } | |
f74c9141 BZ |
673 | out: |
674 | return ret; | |
1da177e4 LT |
675 | } |
676 | ||
c860a8f2 BZ |
677 | /** |
678 | * ide_port_wait_ready - wait for port to become ready | |
679 | * @hwif: IDE port | |
680 | * | |
681 | * This is needed on some PPCs and a bunch of BIOS-less embedded | |
682 | * platforms. Typical cases are: | |
683 | * | |
684 | * - The firmware hard reset the disk before booting the kernel, | |
685 | * the drive is still doing it's poweron-reset sequence, that | |
686 | * can take up to 30 seconds. | |
687 | * | |
688 | * - The firmware does nothing (or no firmware), the device is | |
689 | * still in POST state (same as above actually). | |
690 | * | |
691 | * - Some CD/DVD/Writer combo drives tend to drive the bus during | |
692 | * their reset sequence even when they are non-selected slave | |
693 | * devices, thus preventing discovery of the main HD. | |
694 | * | |
695 | * Doing this wait-for-non-busy should not harm any existing | |
696 | * configuration and fix some issues like the above. | |
697 | * | |
698 | * BenH. | |
699 | * | |
700 | * Returns 0 on success, error code (< 0) otherwise. | |
701 | */ | |
702 | ||
703 | static int ide_port_wait_ready(ide_hwif_t *hwif) | |
1da177e4 | 704 | { |
8266105b | 705 | int unit, rc; |
1da177e4 LT |
706 | |
707 | printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name); | |
708 | ||
709 | /* Let HW settle down a bit from whatever init state we | |
710 | * come from */ | |
711 | mdelay(2); | |
712 | ||
713 | /* Wait for BSY bit to go away, spec timeout is 30 seconds, | |
714 | * I know of at least one disk who takes 31 seconds, I use 35 | |
715 | * here to be safe | |
716 | */ | |
717 | rc = ide_wait_not_busy(hwif, 35000); | |
718 | if (rc) | |
719 | return rc; | |
720 | ||
721 | /* Now make sure both master & slave are ready */ | |
8266105b JS |
722 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
723 | ide_drive_t *drive = &hwif->drives[unit]; | |
724 | ||
725 | /* Ignore disks that we will not probe for later. */ | |
726 | if (!drive->noprobe || drive->present) { | |
727 | SELECT_DRIVE(drive); | |
374e042c | 728 | hwif->tp_ops->set_irq(hwif, 1); |
8266105b JS |
729 | mdelay(2); |
730 | rc = ide_wait_not_busy(hwif, 35000); | |
731 | if (rc) | |
732 | goto out; | |
733 | } else | |
734 | printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n", | |
735 | drive->name); | |
736 | } | |
737 | out: | |
1da177e4 | 738 | /* Exit function with master reselected (let's be sane) */ |
8266105b JS |
739 | if (unit) |
740 | SELECT_DRIVE(&hwif->drives[0]); | |
741 | ||
1da177e4 LT |
742 | return rc; |
743 | } | |
744 | ||
745 | /** | |
746 | * ide_undecoded_slave - look for bad CF adapters | |
4dde4492 | 747 | * @dev1: slave device |
1da177e4 LT |
748 | * |
749 | * Analyse the drives on the interface and attempt to decide if we | |
750 | * have the same drive viewed twice. This occurs with crap CF adapters | |
751 | * and PCMCIA sometimes. | |
752 | */ | |
753 | ||
4dde4492 | 754 | void ide_undecoded_slave(ide_drive_t *dev1) |
1da177e4 | 755 | { |
4dde4492 | 756 | ide_drive_t *dev0 = &dev1->hwif->drives[0]; |
1da177e4 | 757 | |
4dde4492 | 758 | if ((dev1->dn & 1) == 0 || dev0->present == 0) |
1da177e4 LT |
759 | return; |
760 | ||
761 | /* If the models don't match they are not the same product */ | |
4dde4492 BZ |
762 | if (strcmp((char *)&dev0->id[ATA_ID_PROD], |
763 | (char *)&dev1->id[ATA_ID_PROD])) | |
1da177e4 LT |
764 | return; |
765 | ||
766 | /* Serial numbers do not match */ | |
4dde4492 BZ |
767 | if (strncmp((char *)&dev0->id[ATA_ID_SERNO], |
768 | (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN)) | |
1da177e4 LT |
769 | return; |
770 | ||
771 | /* No serial number, thankfully very rare for CF */ | |
4dde4492 | 772 | if (*(char *)&dev0->id[ATA_ID_SERNO] == 0) |
1da177e4 LT |
773 | return; |
774 | ||
775 | /* Appears to be an IDE flash adapter with decode bugs */ | |
776 | printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n"); | |
777 | ||
4dde4492 | 778 | dev1->present = 0; |
1da177e4 LT |
779 | } |
780 | ||
781 | EXPORT_SYMBOL_GPL(ide_undecoded_slave); | |
782 | ||
9d501529 | 783 | static int ide_probe_port(ide_hwif_t *hwif) |
1da177e4 | 784 | { |
1da177e4 LT |
785 | unsigned long flags; |
786 | unsigned int irqd; | |
a14dc574 BZ |
787 | int unit, rc = -ENODEV; |
788 | ||
789 | BUG_ON(hwif->present); | |
1da177e4 | 790 | |
e53cd458 | 791 | if (hwif->drives[0].noprobe && hwif->drives[1].noprobe) |
9d501529 | 792 | return -EACCES; |
1da177e4 | 793 | |
1da177e4 LT |
794 | /* |
795 | * We must always disable IRQ, as probe_for_drive will assert IRQ, but | |
796 | * we'll install our IRQ driver much later... | |
797 | */ | |
798 | irqd = hwif->irq; | |
799 | if (irqd) | |
800 | disable_irq(hwif->irq); | |
801 | ||
802 | local_irq_set(flags); | |
803 | ||
c860a8f2 | 804 | if (ide_port_wait_ready(hwif) == -EBUSY) |
1da177e4 LT |
805 | printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name); |
806 | ||
807 | /* | |
f367bed0 BZ |
808 | * Second drive should only exist if first drive was found, |
809 | * but a lot of cdrom drives are configured as single slaves. | |
1da177e4 | 810 | */ |
f367bed0 | 811 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
1da177e4 LT |
812 | ide_drive_t *drive = &hwif->drives[unit]; |
813 | drive->dn = (hwif->channel ? 2 : 0) + unit; | |
814 | (void) probe_for_drive(drive); | |
a14dc574 BZ |
815 | if (drive->present) |
816 | rc = 0; | |
1da177e4 | 817 | } |
e460a597 | 818 | |
1da177e4 | 819 | local_irq_restore(flags); |
e460a597 | 820 | |
1da177e4 LT |
821 | /* |
822 | * Use cached IRQ number. It might be (and is...) changed by probe | |
823 | * code above | |
824 | */ | |
825 | if (irqd) | |
826 | enable_irq(irqd); | |
827 | ||
a14dc574 | 828 | return rc; |
e84e7ea7 BZ |
829 | } |
830 | ||
831 | static void ide_port_tune_devices(ide_hwif_t *hwif) | |
832 | { | |
ac95beed | 833 | const struct ide_port_ops *port_ops = hwif->port_ops; |
e84e7ea7 BZ |
834 | int unit; |
835 | ||
f01393e4 BZ |
836 | for (unit = 0; unit < MAX_DRIVES; unit++) { |
837 | ide_drive_t *drive = &hwif->drives[unit]; | |
838 | ||
ac95beed BZ |
839 | if (drive->present && port_ops && port_ops->quirkproc) |
840 | port_ops->quirkproc(drive); | |
f01393e4 | 841 | } |
0380dad4 | 842 | |
1da177e4 LT |
843 | for (unit = 0; unit < MAX_DRIVES; ++unit) { |
844 | ide_drive_t *drive = &hwif->drives[unit]; | |
845 | ||
846 | if (drive->present) { | |
207daeaa | 847 | ide_set_max_pio(drive); |
1da177e4 | 848 | |
1da177e4 LT |
849 | drive->nice1 = 1; |
850 | ||
5e37bdc0 | 851 | if (hwif->dma_ops) |
8c0697cc | 852 | ide_set_dma(drive); |
1da177e4 LT |
853 | } |
854 | } | |
208a08f7 KG |
855 | |
856 | for (unit = 0; unit < MAX_DRIVES; ++unit) { | |
857 | ide_drive_t *drive = &hwif->drives[unit]; | |
858 | ||
807b90d0 | 859 | if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT) |
208a08f7 KG |
860 | drive->no_io_32bit = 1; |
861 | else | |
4dde4492 | 862 | drive->no_io_32bit = drive->id[ATA_ID_DWORD_IO] ? 1 : 0; |
208a08f7 | 863 | } |
1da177e4 LT |
864 | } |
865 | ||
1da177e4 LT |
866 | #if MAX_HWIFS > 1 |
867 | /* | |
868 | * save_match() is used to simplify logic in init_irq() below. | |
869 | * | |
870 | * A loophole here is that we may not know about a particular | |
871 | * hwif's irq until after that hwif is actually probed/initialized.. | |
872 | * This could be a problem for the case where an hwif is on a | |
873 | * dual interface that requires serialization (eg. cmd640) and another | |
874 | * hwif using one of the same irqs is initialized beforehand. | |
875 | * | |
876 | * This routine detects and reports such situations, but does not fix them. | |
877 | */ | |
878 | static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match) | |
879 | { | |
880 | ide_hwif_t *m = *match; | |
881 | ||
882 | if (m && m->hwgroup && m->hwgroup != new->hwgroup) { | |
883 | if (!new->hwgroup) | |
884 | return; | |
1b8ebad8 | 885 | printk(KERN_WARNING "%s: potential IRQ problem with %s and %s\n", |
1da177e4 LT |
886 | hwif->name, new->name, m->name); |
887 | } | |
888 | if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */ | |
889 | *match = new; | |
890 | } | |
891 | #endif /* MAX_HWIFS > 1 */ | |
892 | ||
893 | /* | |
894 | * init request queue | |
895 | */ | |
896 | static int ide_init_queue(ide_drive_t *drive) | |
897 | { | |
165125e1 | 898 | struct request_queue *q; |
1da177e4 LT |
899 | ide_hwif_t *hwif = HWIF(drive); |
900 | int max_sectors = 256; | |
901 | int max_sg_entries = PRD_ENTRIES; | |
902 | ||
903 | /* | |
904 | * Our default set up assumes the normal IDE case, | |
905 | * that is 64K segmenting, standard PRD setup | |
906 | * and LBA28. Some drivers then impose their own | |
907 | * limits and LBA48 we could raise it but as yet | |
908 | * do not. | |
909 | */ | |
1946089a | 910 | |
556e58fe | 911 | q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif)); |
1da177e4 LT |
912 | if (!q) |
913 | return 1; | |
914 | ||
915 | q->queuedata = drive; | |
916 | blk_queue_segment_boundary(q, 0xffff); | |
917 | ||
1da177e4 LT |
918 | if (hwif->rqsize < max_sectors) |
919 | max_sectors = hwif->rqsize; | |
920 | blk_queue_max_sectors(q, max_sectors); | |
921 | ||
922 | #ifdef CONFIG_PCI | |
923 | /* When we have an IOMMU, we may have a problem where pci_map_sg() | |
924 | * creates segments that don't completely match our boundary | |
925 | * requirements and thus need to be broken up again. Because it | |
926 | * doesn't align properly either, we may actually have to break up | |
927 | * to more segments than what was we got in the first place, a max | |
928 | * worst case is twice as many. | |
929 | * This will be fixed once we teach pci_map_sg() about our boundary | |
930 | * requirements, hopefully soon. *FIXME* | |
931 | */ | |
932 | if (!PCI_DMA_BUS_IS_PHYS) | |
933 | max_sg_entries >>= 1; | |
934 | #endif /* CONFIG_PCI */ | |
935 | ||
936 | blk_queue_max_hw_segments(q, max_sg_entries); | |
937 | blk_queue_max_phys_segments(q, max_sg_entries); | |
938 | ||
939 | /* assign drive queue */ | |
940 | drive->queue = q; | |
941 | ||
942 | /* needs drive->queue to be set */ | |
943 | ide_toggle_bounce(drive, 1); | |
944 | ||
1da177e4 LT |
945 | return 0; |
946 | } | |
947 | ||
0947e0dc BZ |
948 | static void ide_add_drive_to_hwgroup(ide_drive_t *drive) |
949 | { | |
950 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
951 | ||
952 | spin_lock_irq(&ide_lock); | |
953 | if (!hwgroup->drive) { | |
954 | /* first drive for hwgroup. */ | |
955 | drive->next = drive; | |
956 | hwgroup->drive = drive; | |
957 | hwgroup->hwif = HWIF(hwgroup->drive); | |
958 | } else { | |
959 | drive->next = hwgroup->drive->next; | |
960 | hwgroup->drive->next = drive; | |
961 | } | |
962 | spin_unlock_irq(&ide_lock); | |
963 | } | |
964 | ||
d5bc6592 BZ |
965 | /* |
966 | * For any present drive: | |
967 | * - allocate the block device queue | |
968 | * - link drive into the hwgroup | |
969 | */ | |
970 | static void ide_port_setup_devices(ide_hwif_t *hwif) | |
971 | { | |
972 | int i; | |
973 | ||
26042d05 | 974 | mutex_lock(&ide_cfg_mtx); |
d5bc6592 BZ |
975 | for (i = 0; i < MAX_DRIVES; i++) { |
976 | ide_drive_t *drive = &hwif->drives[i]; | |
977 | ||
978 | if (!drive->present) | |
979 | continue; | |
980 | ||
981 | if (ide_init_queue(drive)) { | |
982 | printk(KERN_ERR "ide: failed to init %s\n", | |
983 | drive->name); | |
984 | continue; | |
985 | } | |
986 | ||
987 | ide_add_drive_to_hwgroup(drive); | |
988 | } | |
26042d05 | 989 | mutex_unlock(&ide_cfg_mtx); |
d5bc6592 BZ |
990 | } |
991 | ||
af1cbba3 BZ |
992 | static ide_hwif_t *ide_ports[MAX_HWIFS]; |
993 | ||
6059143a BZ |
994 | void ide_remove_port_from_hwgroup(ide_hwif_t *hwif) |
995 | { | |
996 | ide_hwgroup_t *hwgroup = hwif->hwgroup; | |
997 | ||
af1cbba3 BZ |
998 | ide_ports[hwif->index] = NULL; |
999 | ||
6059143a BZ |
1000 | spin_lock_irq(&ide_lock); |
1001 | /* | |
1002 | * Remove us from the hwgroup, and free | |
1003 | * the hwgroup if we were the only member | |
1004 | */ | |
1005 | if (hwif->next == hwif) { | |
1006 | BUG_ON(hwgroup->hwif != hwif); | |
1007 | kfree(hwgroup); | |
1008 | } else { | |
1009 | /* There is another interface in hwgroup. | |
1010 | * Unlink us, and set hwgroup->drive and ->hwif to | |
1011 | * something sane. | |
1012 | */ | |
1013 | ide_hwif_t *g = hwgroup->hwif; | |
1014 | ||
1015 | while (g->next != hwif) | |
1016 | g = g->next; | |
1017 | g->next = hwif->next; | |
1018 | if (hwgroup->hwif == hwif) { | |
1019 | /* Chose a random hwif for hwgroup->hwif. | |
1020 | * It's guaranteed that there are no drives | |
1021 | * left in the hwgroup. | |
1022 | */ | |
1023 | BUG_ON(hwgroup->drive != NULL); | |
1024 | hwgroup->hwif = g; | |
1025 | } | |
1026 | BUG_ON(hwgroup->hwif == hwif); | |
1027 | } | |
1028 | spin_unlock_irq(&ide_lock); | |
1029 | } | |
1030 | ||
1da177e4 LT |
1031 | /* |
1032 | * This routine sets up the irq for an ide interface, and creates a new | |
1033 | * hwgroup for the irq/hwif if none was previously assigned. | |
1034 | * | |
1035 | * Much of the code is for correctly detecting/handling irq sharing | |
1036 | * and irq serialization situations. This is somewhat complex because | |
1037 | * it handles static as well as dynamic (PCMCIA) IDE interfaces. | |
1da177e4 LT |
1038 | */ |
1039 | static int init_irq (ide_hwif_t *hwif) | |
1040 | { | |
4c3032d8 | 1041 | struct ide_io_ports *io_ports = &hwif->io_ports; |
1da177e4 LT |
1042 | unsigned int index; |
1043 | ide_hwgroup_t *hwgroup; | |
1044 | ide_hwif_t *match = NULL; | |
1045 | ||
1046 | ||
1047 | BUG_ON(in_interrupt()); | |
1048 | BUG_ON(irqs_disabled()); | |
556e58fe RT |
1049 | BUG_ON(hwif == NULL); |
1050 | ||
ef29888e | 1051 | mutex_lock(&ide_cfg_mtx); |
1da177e4 LT |
1052 | hwif->hwgroup = NULL; |
1053 | #if MAX_HWIFS > 1 | |
1054 | /* | |
1055 | * Group up with any other hwifs that share our irq(s). | |
1056 | */ | |
1057 | for (index = 0; index < MAX_HWIFS; index++) { | |
af1cbba3 BZ |
1058 | ide_hwif_t *h = ide_ports[index]; |
1059 | ||
1060 | if (h && h->hwgroup) { /* scan only initialized ports */ | |
1da177e4 LT |
1061 | if (hwif->irq == h->irq) { |
1062 | hwif->sharing_irq = h->sharing_irq = 1; | |
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 | } | |
1078 | #endif /* MAX_HWIFS > 1 */ | |
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 | */ | |
1095 | spin_lock_irq(&ide_lock); | |
1096 | hwif->next = hwgroup->hwif->next; | |
1097 | hwgroup->hwif->next = hwif; | |
cae5c820 | 1098 | BUG_ON(hwif->next == hwif); |
1da177e4 LT |
1099 | spin_unlock_irq(&ide_lock); |
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 LT |
1105 | |
1106 | hwif->hwgroup = hwgroup; | |
422278ef | 1107 | hwgroup->hwif = hwif->next = hwif; |
1da177e4 | 1108 | |
1da177e4 LT |
1109 | init_timer(&hwgroup->timer); |
1110 | hwgroup->timer.function = &ide_timer_expiry; | |
1111 | hwgroup->timer.data = (unsigned long) hwgroup; | |
1112 | } | |
1113 | ||
af1cbba3 BZ |
1114 | ide_ports[hwif->index] = hwif; |
1115 | ||
1da177e4 LT |
1116 | /* |
1117 | * Allocate the irq, if not already obtained for another hwif | |
1118 | */ | |
1119 | if (!match || match->irq != hwif->irq) { | |
7b5da4be | 1120 | int sa = 0; |
7b892806 | 1121 | #if defined(__mc68000__) |
362537b9 | 1122 | sa = IRQF_SHARED; |
e1771e20 | 1123 | #endif /* __mc68000__ */ |
1da177e4 | 1124 | |
7b5da4be | 1125 | if (IDE_CHIPSET_IS_PCI(hwif->chipset)) |
362537b9 | 1126 | sa = IRQF_SHARED; |
1da177e4 | 1127 | |
4c3032d8 | 1128 | if (io_ports->ctl_addr) |
374e042c | 1129 | hwif->tp_ops->set_irq(hwif, 1); |
1da177e4 LT |
1130 | |
1131 | if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup)) | |
1132 | goto out_unlink; | |
1133 | } | |
1134 | ||
8a0e7e14 BZ |
1135 | if (!hwif->rqsize) { |
1136 | if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) || | |
1137 | (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA)) | |
1138 | hwif->rqsize = 256; | |
1139 | else | |
1140 | hwif->rqsize = 65536; | |
1141 | } | |
1142 | ||
7b892806 | 1143 | #if !defined(__mc68000__) |
1b8ebad8 | 1144 | printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name, |
4c3032d8 BZ |
1145 | io_ports->data_addr, io_ports->status_addr, |
1146 | io_ports->ctl_addr, hwif->irq); | |
1da177e4 | 1147 | #else |
1b8ebad8 | 1148 | printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name, |
4c3032d8 | 1149 | io_ports->data_addr, hwif->irq); |
7b892806 | 1150 | #endif /* __mc68000__ */ |
1da177e4 | 1151 | if (match) |
1b8ebad8 | 1152 | printk(KERN_CONT " (%sed with %s)", |
1da177e4 | 1153 | hwif->sharing_irq ? "shar" : "serializ", match->name); |
1b8ebad8 | 1154 | printk(KERN_CONT "\n"); |
d5bc6592 | 1155 | |
ef29888e | 1156 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1157 | return 0; |
1158 | out_unlink: | |
fbd13088 | 1159 | ide_remove_port_from_hwgroup(hwif); |
1da177e4 | 1160 | out_up: |
ef29888e | 1161 | mutex_unlock(&ide_cfg_mtx); |
1da177e4 LT |
1162 | return 1; |
1163 | } | |
1164 | ||
1165 | static int ata_lock(dev_t dev, void *data) | |
1166 | { | |
1167 | /* FIXME: we want to pin hwif down */ | |
1168 | return 0; | |
1169 | } | |
1170 | ||
1171 | static struct kobject *ata_probe(dev_t dev, int *part, void *data) | |
1172 | { | |
1173 | ide_hwif_t *hwif = data; | |
1174 | int unit = *part >> PARTN_BITS; | |
1175 | ide_drive_t *drive = &hwif->drives[unit]; | |
1176 | if (!drive->present) | |
1177 | return NULL; | |
1178 | ||
1179 | if (drive->media == ide_disk) | |
1180 | request_module("ide-disk"); | |
1181 | if (drive->scsi) | |
1182 | request_module("ide-scsi"); | |
1183 | if (drive->media == ide_cdrom || drive->media == ide_optical) | |
1184 | request_module("ide-cd"); | |
1185 | if (drive->media == ide_tape) | |
1186 | request_module("ide-tape"); | |
1187 | if (drive->media == ide_floppy) | |
1188 | request_module("ide-floppy"); | |
1189 | ||
1190 | return NULL; | |
1191 | } | |
1192 | ||
1193 | static struct kobject *exact_match(dev_t dev, int *part, void *data) | |
1194 | { | |
1195 | struct gendisk *p = data; | |
1196 | *part &= (1 << PARTN_BITS) - 1; | |
ed9e1982 | 1197 | return &disk_to_dev(p)->kobj; |
1da177e4 LT |
1198 | } |
1199 | ||
1200 | static int exact_lock(dev_t dev, void *data) | |
1201 | { | |
1202 | struct gendisk *p = data; | |
1203 | ||
1204 | if (!get_disk(p)) | |
1205 | return -1; | |
1206 | return 0; | |
1207 | } | |
1208 | ||
1209 | void ide_register_region(struct gendisk *disk) | |
1210 | { | |
1211 | blk_register_region(MKDEV(disk->major, disk->first_minor), | |
1212 | disk->minors, NULL, exact_match, exact_lock, disk); | |
1213 | } | |
1214 | ||
1215 | EXPORT_SYMBOL_GPL(ide_register_region); | |
1216 | ||
1217 | void ide_unregister_region(struct gendisk *disk) | |
1218 | { | |
1219 | blk_unregister_region(MKDEV(disk->major, disk->first_minor), | |
1220 | disk->minors); | |
1221 | } | |
1222 | ||
1223 | EXPORT_SYMBOL_GPL(ide_unregister_region); | |
1224 | ||
1225 | void ide_init_disk(struct gendisk *disk, ide_drive_t *drive) | |
1226 | { | |
1227 | ide_hwif_t *hwif = drive->hwif; | |
1228 | unsigned int unit = (drive->select.all >> 4) & 1; | |
1229 | ||
1230 | disk->major = hwif->major; | |
1231 | disk->first_minor = unit << PARTN_BITS; | |
1232 | sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit); | |
1233 | disk->queue = drive->queue; | |
1234 | } | |
1235 | ||
1236 | EXPORT_SYMBOL_GPL(ide_init_disk); | |
1237 | ||
8604affd BZ |
1238 | static void ide_remove_drive_from_hwgroup(ide_drive_t *drive) |
1239 | { | |
1240 | ide_hwgroup_t *hwgroup = drive->hwif->hwgroup; | |
1241 | ||
1242 | if (drive == drive->next) { | |
1243 | /* special case: last drive from hwgroup. */ | |
1244 | BUG_ON(hwgroup->drive != drive); | |
1245 | hwgroup->drive = NULL; | |
1246 | } else { | |
1247 | ide_drive_t *walk; | |
1248 | ||
1249 | walk = hwgroup->drive; | |
1250 | while (walk->next != drive) | |
1251 | walk = walk->next; | |
1252 | walk->next = drive->next; | |
1253 | if (hwgroup->drive == drive) { | |
1254 | hwgroup->drive = drive->next; | |
1255 | hwgroup->hwif = hwgroup->drive->hwif; | |
1256 | } | |
1257 | } | |
1258 | BUG_ON(hwgroup->drive == drive); | |
1259 | } | |
1260 | ||
1da177e4 LT |
1261 | static void drive_release_dev (struct device *dev) |
1262 | { | |
1263 | ide_drive_t *drive = container_of(dev, ide_drive_t, gendev); | |
1264 | ||
5b0c4b30 BZ |
1265 | ide_proc_unregister_device(drive); |
1266 | ||
8604affd | 1267 | spin_lock_irq(&ide_lock); |
8604affd | 1268 | ide_remove_drive_from_hwgroup(drive); |
6044ec88 JJ |
1269 | kfree(drive->id); |
1270 | drive->id = NULL; | |
8604affd BZ |
1271 | drive->present = 0; |
1272 | /* Messed up locking ... */ | |
1273 | spin_unlock_irq(&ide_lock); | |
1274 | blk_cleanup_queue(drive->queue); | |
1275 | spin_lock_irq(&ide_lock); | |
1276 | drive->queue = NULL; | |
1277 | spin_unlock_irq(&ide_lock); | |
1278 | ||
f36d4024 | 1279 | complete(&drive->gendev_rel_comp); |
1da177e4 LT |
1280 | } |
1281 | ||
1da177e4 LT |
1282 | static int hwif_init(ide_hwif_t *hwif) |
1283 | { | |
1284 | int old_irq; | |
1285 | ||
1da177e4 | 1286 | if (!hwif->irq) { |
a861beb1 | 1287 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1288 | if (!hwif->irq) { |
1b8ebad8 | 1289 | printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name); |
48535651 | 1290 | return 0; |
1da177e4 LT |
1291 | } |
1292 | } | |
1da177e4 | 1293 | |
1da177e4 LT |
1294 | if (register_blkdev(hwif->major, hwif->name)) |
1295 | return 0; | |
1296 | ||
1297 | if (!hwif->sg_max_nents) | |
1298 | hwif->sg_max_nents = PRD_ENTRIES; | |
1299 | ||
45711f1a | 1300 | hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents, |
1da177e4 LT |
1301 | GFP_KERNEL); |
1302 | if (!hwif->sg_table) { | |
1303 | printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name); | |
1304 | goto out; | |
1305 | } | |
45711f1a JA |
1306 | |
1307 | sg_init_table(hwif->sg_table, hwif->sg_max_nents); | |
1da177e4 LT |
1308 | |
1309 | if (init_irq(hwif) == 0) | |
1310 | goto done; | |
1311 | ||
1312 | old_irq = hwif->irq; | |
1313 | /* | |
1314 | * It failed to initialise. Find the default IRQ for | |
1315 | * this port and try that. | |
1316 | */ | |
a861beb1 | 1317 | hwif->irq = __ide_default_irq(hwif->io_ports.data_addr); |
4c3032d8 | 1318 | if (!hwif->irq) { |
1b8ebad8 | 1319 | printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n", |
1da177e4 LT |
1320 | hwif->name, old_irq); |
1321 | goto out; | |
1322 | } | |
1323 | if (init_irq(hwif)) { | |
1b8ebad8 | 1324 | printk(KERN_ERR "%s: probed IRQ %d and default IRQ %d failed\n", |
1da177e4 LT |
1325 | hwif->name, old_irq, hwif->irq); |
1326 | goto out; | |
1327 | } | |
1b8ebad8 | 1328 | printk(KERN_WARNING "%s: probed IRQ %d failed, using default\n", |
1da177e4 LT |
1329 | hwif->name, hwif->irq); |
1330 | ||
1331 | done: | |
3a4e7c96 BZ |
1332 | blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS, |
1333 | THIS_MODULE, ata_probe, ata_lock, hwif); | |
1da177e4 LT |
1334 | return 1; |
1335 | ||
1336 | out: | |
1337 | unregister_blkdev(hwif->major, hwif->name); | |
1338 | return 0; | |
1339 | } | |
1340 | ||
9601a607 BZ |
1341 | static void hwif_register_devices(ide_hwif_t *hwif) |
1342 | { | |
1343 | unsigned int i; | |
1344 | ||
1345 | for (i = 0; i < MAX_DRIVES; i++) { | |
1346 | ide_drive_t *drive = &hwif->drives[i]; | |
c5d70cc7 BZ |
1347 | struct device *dev = &drive->gendev; |
1348 | int ret; | |
9601a607 | 1349 | |
c5d70cc7 BZ |
1350 | if (!drive->present) |
1351 | continue; | |
9601a607 | 1352 | |
c5d70cc7 BZ |
1353 | ide_add_generic_settings(drive); |
1354 | ||
1355 | snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i); | |
1356 | dev->parent = &hwif->gendev; | |
1357 | dev->bus = &ide_bus_type; | |
1358 | dev->driver_data = drive; | |
1359 | dev->release = drive_release_dev; | |
1360 | ||
1361 | ret = device_register(dev); | |
1362 | if (ret < 0) | |
1363 | printk(KERN_WARNING "IDE: %s: device_register error: " | |
1364 | "%d\n", __func__, ret); | |
9601a607 BZ |
1365 | } |
1366 | } | |
1367 | ||
7704ca2a BZ |
1368 | static void ide_port_init_devices(ide_hwif_t *hwif) |
1369 | { | |
ac95beed | 1370 | const struct ide_port_ops *port_ops = hwif->port_ops; |
7704ca2a BZ |
1371 | int i; |
1372 | ||
1373 | for (i = 0; i < MAX_DRIVES; i++) { | |
1374 | ide_drive_t *drive = &hwif->drives[i]; | |
1375 | ||
1376 | if (hwif->host_flags & IDE_HFLAG_IO_32BIT) | |
1377 | drive->io_32bit = 1; | |
1378 | if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS) | |
1379 | drive->unmask = 1; | |
807b90d0 BZ |
1380 | if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS) |
1381 | drive->no_unmask = 1; | |
1f2cf8b0 | 1382 | |
e6d95bd1 BZ |
1383 | if (port_ops && port_ops->init_dev) |
1384 | port_ops->init_dev(drive); | |
1385 | } | |
7704ca2a BZ |
1386 | } |
1387 | ||
c413b9b9 BZ |
1388 | static void ide_init_port(ide_hwif_t *hwif, unsigned int port, |
1389 | const struct ide_port_info *d) | |
8447d9d5 | 1390 | { |
b7691646 | 1391 | hwif->channel = port; |
c413b9b9 BZ |
1392 | |
1393 | if (d->chipset) | |
1394 | hwif->chipset = d->chipset; | |
1395 | ||
1396 | if (d->init_iops) | |
1397 | d->init_iops(hwif); | |
1398 | ||
c413b9b9 BZ |
1399 | if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) || |
1400 | (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS)) | |
1401 | hwif->irq = port ? 15 : 14; | |
1402 | ||
23f8e4bf BZ |
1403 | /* ->host_flags may be set by ->init_iops (or even earlier...) */ |
1404 | hwif->host_flags |= d->host_flags; | |
c413b9b9 BZ |
1405 | hwif->pio_mask = d->pio_mask; |
1406 | ||
374e042c BZ |
1407 | if (d->tp_ops) |
1408 | hwif->tp_ops = d->tp_ops; | |
1409 | ||
ac95beed BZ |
1410 | /* ->set_pio_mode for DTC2278 is currently limited to port 0 */ |
1411 | if (hwif->chipset != ide_dtc2278 || hwif->channel == 0) | |
1412 | hwif->port_ops = d->port_ops; | |
1413 | ||
c413b9b9 BZ |
1414 | hwif->swdma_mask = d->swdma_mask; |
1415 | hwif->mwdma_mask = d->mwdma_mask; | |
1416 | hwif->ultra_mask = d->udma_mask; | |
1417 | ||
b123f56e BZ |
1418 | if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) { |
1419 | int rc; | |
1420 | ||
1421 | if (d->init_dma) | |
1422 | rc = d->init_dma(hwif, d); | |
1423 | else | |
1424 | rc = ide_hwif_setup_dma(hwif, d); | |
1425 | ||
1426 | if (rc < 0) { | |
1427 | printk(KERN_INFO "%s: DMA disabled\n", hwif->name); | |
ebb00fb5 | 1428 | hwif->dma_base = 0; |
b123f56e BZ |
1429 | hwif->swdma_mask = 0; |
1430 | hwif->mwdma_mask = 0; | |
1431 | hwif->ultra_mask = 0; | |
5e37bdc0 BZ |
1432 | } else if (d->dma_ops) |
1433 | hwif->dma_ops = d->dma_ops; | |
b123f56e | 1434 | } |
c413b9b9 | 1435 | |
1024c5f4 BZ |
1436 | if ((d->host_flags & IDE_HFLAG_SERIALIZE) || |
1437 | ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base)) { | |
1438 | if (hwif->mate) | |
1439 | hwif->mate->serialized = hwif->serialized = 1; | |
1440 | } | |
1441 | ||
c413b9b9 BZ |
1442 | if (d->host_flags & IDE_HFLAG_RQSIZE_256) |
1443 | hwif->rqsize = 256; | |
1444 | ||
1445 | /* call chipset specific routine for each enabled port */ | |
1446 | if (d->init_hwif) | |
1447 | d->init_hwif(hwif); | |
c7f6f21a | 1448 | } |
bfa14b42 | 1449 | |
c7f6f21a BZ |
1450 | static void ide_port_cable_detect(ide_hwif_t *hwif) |
1451 | { | |
ac95beed BZ |
1452 | const struct ide_port_ops *port_ops = hwif->port_ops; |
1453 | ||
1454 | if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) { | |
bfa14b42 | 1455 | if (hwif->cbl != ATA_CBL_PATA40_SHORT) |
ac95beed | 1456 | hwif->cbl = port_ops->cable_detect(hwif); |
bfa14b42 | 1457 | } |
c413b9b9 BZ |
1458 | } |
1459 | ||
f74c9141 BZ |
1460 | static ssize_t store_delete_devices(struct device *portdev, |
1461 | struct device_attribute *attr, | |
1462 | const char *buf, size_t n) | |
1463 | { | |
1464 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1465 | ||
1466 | if (strncmp(buf, "1", n)) | |
1467 | return -EINVAL; | |
1468 | ||
1469 | ide_port_unregister_devices(hwif); | |
1470 | ||
1471 | return n; | |
1472 | }; | |
1473 | ||
1474 | static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices); | |
1475 | ||
1476 | static ssize_t store_scan(struct device *portdev, | |
1477 | struct device_attribute *attr, | |
1478 | const char *buf, size_t n) | |
1479 | { | |
1480 | ide_hwif_t *hwif = dev_get_drvdata(portdev); | |
1481 | ||
1482 | if (strncmp(buf, "1", n)) | |
1483 | return -EINVAL; | |
1484 | ||
1485 | ide_port_unregister_devices(hwif); | |
1486 | ide_port_scan(hwif); | |
1487 | ||
1488 | return n; | |
1489 | }; | |
1490 | ||
1491 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
1492 | ||
1493 | static struct device_attribute *ide_port_attrs[] = { | |
1494 | &dev_attr_delete_devices, | |
1495 | &dev_attr_scan, | |
1496 | NULL | |
1497 | }; | |
1498 | ||
1499 | static int ide_sysfs_register_port(ide_hwif_t *hwif) | |
1500 | { | |
ca09a237 | 1501 | int i, uninitialized_var(rc); |
f74c9141 BZ |
1502 | |
1503 | for (i = 0; ide_port_attrs[i]; i++) { | |
1504 | rc = device_create_file(hwif->portdev, ide_port_attrs[i]); | |
1505 | if (rc) | |
1506 | break; | |
1507 | } | |
1508 | ||
1509 | return rc; | |
1510 | } | |
1511 | ||
8cdf3100 BZ |
1512 | static unsigned int ide_indexes; |
1513 | ||
fe80b937 | 1514 | /** |
8cdf3100 | 1515 | * ide_find_port_slot - find free port slot |
fe80b937 BZ |
1516 | * @d: IDE port info |
1517 | * | |
8cdf3100 | 1518 | * Return the new port slot index or -ENOENT if we are out of free slots. |
fe80b937 BZ |
1519 | */ |
1520 | ||
8cdf3100 | 1521 | static int ide_find_port_slot(const struct ide_port_info *d) |
fe80b937 | 1522 | { |
8cdf3100 | 1523 | int idx = -ENOENT; |
fe80b937 | 1524 | u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1; |
8cdf3100 | 1525 | u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;; |
fe80b937 BZ |
1526 | |
1527 | /* | |
1528 | * Claim an unassigned slot. | |
1529 | * | |
1530 | * Give preference to claiming other slots before claiming ide0/ide1, | |
1531 | * just in case there's another interface yet-to-be-scanned | |
1532 | * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1533 | * | |
1534 | * Unless there is a bootable card that does not use the standard | |
1535 | * ports 0x1f0/0x170 (the ide0/ide1 defaults). | |
1536 | */ | |
8cdf3100 BZ |
1537 | mutex_lock(&ide_cfg_mtx); |
1538 | if (MAX_HWIFS == 1) { | |
1539 | if (ide_indexes == 0 && i == 0) | |
1540 | idx = 1; | |
fe80b937 | 1541 | } else { |
8cdf3100 BZ |
1542 | if (bootable) { |
1543 | if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1) | |
1544 | idx = ffz(ide_indexes | i); | |
1545 | } else { | |
1546 | if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1) | |
1547 | idx = ffz(ide_indexes | 3); | |
1548 | else if ((ide_indexes & 3) != 3) | |
1549 | idx = ffz(ide_indexes); | |
fe80b937 BZ |
1550 | } |
1551 | } | |
8cdf3100 BZ |
1552 | if (idx >= 0) |
1553 | ide_indexes |= (1 << idx); | |
1554 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1555 | |
8cdf3100 BZ |
1556 | return idx; |
1557 | } | |
256c5f8e | 1558 | |
8cdf3100 BZ |
1559 | static void ide_free_port_slot(int idx) |
1560 | { | |
1561 | mutex_lock(&ide_cfg_mtx); | |
1562 | ide_indexes &= ~(1 << idx); | |
1563 | mutex_unlock(&ide_cfg_mtx); | |
fe80b937 | 1564 | } |
fe80b937 | 1565 | |
48c3c107 BZ |
1566 | struct ide_host *ide_host_alloc_all(const struct ide_port_info *d, |
1567 | hw_regs_t **hws) | |
1568 | { | |
1569 | struct ide_host *host; | |
1570 | int i; | |
1571 | ||
1572 | host = kzalloc(sizeof(*host), GFP_KERNEL); | |
1573 | if (host == NULL) | |
1574 | return NULL; | |
1575 | ||
1576 | for (i = 0; i < MAX_HWIFS; i++) { | |
1577 | ide_hwif_t *hwif; | |
8cdf3100 | 1578 | int idx; |
48c3c107 BZ |
1579 | |
1580 | if (hws[i] == NULL) | |
1581 | continue; | |
1582 | ||
18de1017 BZ |
1583 | hwif = kzalloc(sizeof(*hwif), GFP_KERNEL); |
1584 | if (hwif == NULL) | |
1585 | continue; | |
1586 | ||
8cdf3100 BZ |
1587 | idx = ide_find_port_slot(d); |
1588 | if (idx < 0) { | |
1589 | printk(KERN_ERR "%s: no free slot for interface\n", | |
1590 | d ? d->name : "ide"); | |
18de1017 | 1591 | kfree(hwif); |
8cdf3100 | 1592 | continue; |
48c3c107 | 1593 | } |
8cdf3100 | 1594 | |
8cdf3100 BZ |
1595 | ide_init_port_data(hwif, idx); |
1596 | ||
08da591e BZ |
1597 | hwif->host = host; |
1598 | ||
8cdf3100 BZ |
1599 | host->ports[i] = hwif; |
1600 | host->n_ports++; | |
48c3c107 BZ |
1601 | } |
1602 | ||
1603 | if (host->n_ports == 0) { | |
1604 | kfree(host); | |
1605 | return NULL; | |
1606 | } | |
1607 | ||
6cdf6eb3 BZ |
1608 | if (hws[0]) |
1609 | host->dev[0] = hws[0]->dev; | |
1610 | ||
ef0b0427 BZ |
1611 | if (d) |
1612 | host->host_flags = d->host_flags; | |
1613 | ||
48c3c107 BZ |
1614 | return host; |
1615 | } | |
1616 | EXPORT_SYMBOL_GPL(ide_host_alloc_all); | |
1617 | ||
1618 | struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws) | |
1619 | { | |
1620 | hw_regs_t *hws_all[MAX_HWIFS]; | |
1621 | int i; | |
1622 | ||
1623 | for (i = 0; i < MAX_HWIFS; i++) | |
1624 | hws_all[i] = (i < 4) ? hws[i] : NULL; | |
1625 | ||
1626 | return ide_host_alloc_all(d, hws_all); | |
1627 | } | |
1628 | EXPORT_SYMBOL_GPL(ide_host_alloc); | |
1629 | ||
1630 | int ide_host_register(struct ide_host *host, const struct ide_port_info *d, | |
1631 | hw_regs_t **hws) | |
c413b9b9 BZ |
1632 | { |
1633 | ide_hwif_t *hwif, *mate = NULL; | |
e0d00207 | 1634 | int i, j = 0; |
8447d9d5 | 1635 | |
c413b9b9 | 1636 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1637 | hwif = host->ports[i]; |
48c3c107 | 1638 | |
e0d00207 | 1639 | if (hwif == NULL) { |
c413b9b9 BZ |
1640 | mate = NULL; |
1641 | continue; | |
1642 | } | |
1643 | ||
c97c6aca | 1644 | ide_init_port_hw(hwif, hws[i]); |
9fd91d95 BZ |
1645 | ide_port_apply_params(hwif); |
1646 | ||
1647 | if (d == NULL) { | |
1648 | mate = NULL; | |
1649 | continue; | |
1650 | } | |
1651 | ||
b7691646 | 1652 | if ((i & 1) && mate) { |
c413b9b9 BZ |
1653 | hwif->mate = mate; |
1654 | mate->mate = hwif; | |
1655 | } | |
1656 | ||
1657 | mate = (i & 1) ? NULL : hwif; | |
1658 | ||
1659 | ide_init_port(hwif, i & 1, d); | |
c7f6f21a | 1660 | ide_port_cable_detect(hwif); |
7704ca2a | 1661 | ide_port_init_devices(hwif); |
c413b9b9 BZ |
1662 | } |
1663 | ||
151575e4 | 1664 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1665 | hwif = host->ports[i]; |
ba6560aa | 1666 | |
e0d00207 BZ |
1667 | if (hwif == NULL) |
1668 | continue; | |
139ddfca | 1669 | |
eb716beb BZ |
1670 | if (ide_probe_port(hwif) == 0) |
1671 | hwif->present = 1; | |
a14dc574 BZ |
1672 | |
1673 | if (hwif->chipset != ide_4drives || !hwif->mate || | |
1674 | !hwif->mate->present) | |
1675 | ide_register_port(hwif); | |
1676 | ||
eb716beb BZ |
1677 | if (hwif->present) |
1678 | ide_port_tune_devices(hwif); | |
2e13093a | 1679 | } |
ba6560aa | 1680 | |
151575e4 | 1681 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1682 | hwif = host->ports[i]; |
2e13093a | 1683 | |
e0d00207 BZ |
1684 | if (hwif == NULL) |
1685 | continue; | |
ba6560aa BZ |
1686 | |
1687 | if (hwif_init(hwif) == 0) { | |
1688 | printk(KERN_INFO "%s: failed to initialize IDE " | |
1689 | "interface\n", hwif->name); | |
48535651 | 1690 | hwif->present = 0; |
ba6560aa BZ |
1691 | continue; |
1692 | } | |
decdc3f0 | 1693 | |
e0d00207 BZ |
1694 | j++; |
1695 | ||
eb716beb BZ |
1696 | if (hwif->present) |
1697 | ide_port_setup_devices(hwif); | |
26042d05 | 1698 | |
decdc3f0 | 1699 | ide_acpi_init(hwif); |
eb716beb BZ |
1700 | |
1701 | if (hwif->present) | |
1702 | ide_acpi_port_init_devices(hwif); | |
2e13093a BZ |
1703 | } |
1704 | ||
151575e4 | 1705 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1706 | hwif = host->ports[i]; |
2e13093a | 1707 | |
e0d00207 BZ |
1708 | if (hwif == NULL) |
1709 | continue; | |
ba6560aa | 1710 | |
eb716beb BZ |
1711 | if (hwif->chipset == ide_unknown) |
1712 | hwif->chipset = ide_generic; | |
1713 | ||
1714 | if (hwif->present) | |
ba6560aa | 1715 | hwif_register_devices(hwif); |
8447d9d5 BZ |
1716 | } |
1717 | ||
151575e4 | 1718 | for (i = 0; i < MAX_HWIFS; i++) { |
e0d00207 | 1719 | hwif = host->ports[i]; |
327617e1 | 1720 | |
e0d00207 BZ |
1721 | if (hwif == NULL) |
1722 | continue; | |
327617e1 | 1723 | |
eb716beb BZ |
1724 | ide_sysfs_register_port(hwif); |
1725 | ide_proc_register_port(hwif); | |
1726 | ||
1727 | if (hwif->present) | |
d9270a3f | 1728 | ide_proc_port_register_devices(hwif); |
8447d9d5 BZ |
1729 | } |
1730 | ||
e0d00207 | 1731 | return j ? 0 : -1; |
8447d9d5 | 1732 | } |
48c3c107 | 1733 | EXPORT_SYMBOL_GPL(ide_host_register); |
151575e4 | 1734 | |
6f904d01 BZ |
1735 | int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws, |
1736 | struct ide_host **hostp) | |
1737 | { | |
1738 | struct ide_host *host; | |
8a69580e | 1739 | int rc; |
6f904d01 BZ |
1740 | |
1741 | host = ide_host_alloc(d, hws); | |
1742 | if (host == NULL) | |
1743 | return -ENOMEM; | |
1744 | ||
8a69580e BZ |
1745 | rc = ide_host_register(host, d, hws); |
1746 | if (rc) { | |
1747 | ide_host_free(host); | |
1748 | return rc; | |
1749 | } | |
6f904d01 BZ |
1750 | |
1751 | if (hostp) | |
1752 | *hostp = host; | |
1753 | ||
1754 | return 0; | |
1755 | } | |
1756 | EXPORT_SYMBOL_GPL(ide_host_add); | |
1757 | ||
8a69580e | 1758 | void ide_host_free(struct ide_host *host) |
151575e4 | 1759 | { |
8cdf3100 | 1760 | ide_hwif_t *hwif; |
151575e4 | 1761 | int i; |
8447d9d5 | 1762 | |
c97c6aca | 1763 | for (i = 0; i < MAX_HWIFS; i++) { |
8cdf3100 BZ |
1764 | hwif = host->ports[i]; |
1765 | ||
1766 | if (hwif == NULL) | |
1767 | continue; | |
1768 | ||
8cdf3100 | 1769 | ide_free_port_slot(hwif->index); |
18de1017 | 1770 | kfree(hwif); |
c97c6aca | 1771 | } |
151575e4 | 1772 | |
48c3c107 | 1773 | kfree(host); |
151575e4 | 1774 | } |
8a69580e BZ |
1775 | EXPORT_SYMBOL_GPL(ide_host_free); |
1776 | ||
1777 | void ide_host_remove(struct ide_host *host) | |
1778 | { | |
1779 | int i; | |
1780 | ||
1781 | for (i = 0; i < MAX_HWIFS; i++) { | |
1782 | if (host->ports[i]) | |
1783 | ide_unregister(host->ports[i]); | |
1784 | } | |
1785 | ||
1786 | ide_host_free(host); | |
1787 | } | |
48c3c107 | 1788 | EXPORT_SYMBOL_GPL(ide_host_remove); |
2dde7861 BZ |
1789 | |
1790 | void ide_port_scan(ide_hwif_t *hwif) | |
1791 | { | |
9fd91d95 | 1792 | ide_port_apply_params(hwif); |
2dde7861 BZ |
1793 | ide_port_cable_detect(hwif); |
1794 | ide_port_init_devices(hwif); | |
1795 | ||
1796 | if (ide_probe_port(hwif) < 0) | |
1797 | return; | |
1798 | ||
1799 | hwif->present = 1; | |
1800 | ||
1801 | ide_port_tune_devices(hwif); | |
1802 | ide_acpi_port_init_devices(hwif); | |
1803 | ide_port_setup_devices(hwif); | |
1804 | hwif_register_devices(hwif); | |
1805 | ide_proc_port_register_devices(hwif); | |
1806 | } | |
1807 | EXPORT_SYMBOL_GPL(ide_port_scan); | |
3b36f66b | 1808 | |
48c3c107 | 1809 | static void ide_legacy_init_one(hw_regs_t **hws, hw_regs_t *hw, |
c97c6aca | 1810 | u8 port_no, const struct ide_port_info *d, |
d9b819a0 | 1811 | unsigned long config) |
3b36f66b | 1812 | { |
d9b819a0 BZ |
1813 | unsigned long base, ctl; |
1814 | int irq; | |
3b36f66b | 1815 | |
d9b819a0 BZ |
1816 | if (port_no == 0) { |
1817 | base = 0x1f0; | |
1818 | ctl = 0x3f6; | |
1819 | irq = 14; | |
1820 | } else { | |
1821 | base = 0x170; | |
1822 | ctl = 0x376; | |
1823 | irq = 15; | |
1824 | } | |
3b36f66b | 1825 | |
d92f1a28 BZ |
1826 | if (!request_region(base, 8, d->name)) { |
1827 | printk(KERN_ERR "%s: I/O resource 0x%lX-0x%lX not free.\n", | |
1828 | d->name, base, base + 7); | |
1829 | return; | |
1830 | } | |
1831 | ||
1832 | if (!request_region(ctl, 1, d->name)) { | |
1833 | printk(KERN_ERR "%s: I/O resource 0x%lX not free.\n", | |
1834 | d->name, ctl); | |
1835 | release_region(base, 8); | |
1836 | return; | |
1837 | } | |
1838 | ||
d9b819a0 BZ |
1839 | ide_std_init_ports(hw, base, ctl); |
1840 | hw->irq = irq; | |
d427e836 | 1841 | hw->chipset = d->chipset; |
d6276b5f | 1842 | hw->config = config; |
3b36f66b | 1843 | |
48c3c107 | 1844 | hws[port_no] = hw; |
d9b819a0 | 1845 | } |
3b36f66b | 1846 | |
d9b819a0 BZ |
1847 | int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config) |
1848 | { | |
c97c6aca | 1849 | hw_regs_t hw[2], *hws[] = { NULL, NULL, NULL, NULL }; |
0bfeee7d | 1850 | |
d9b819a0 BZ |
1851 | memset(&hw, 0, sizeof(hw)); |
1852 | ||
1853 | if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0) | |
48c3c107 BZ |
1854 | ide_legacy_init_one(hws, &hw[0], 0, d, config); |
1855 | ide_legacy_init_one(hws, &hw[1], 1, d, config); | |
d9b819a0 | 1856 | |
48c3c107 | 1857 | if (hws[0] == NULL && hws[1] == NULL && |
d9b819a0 BZ |
1858 | (d->host_flags & IDE_HFLAG_SINGLE)) |
1859 | return -ENOENT; | |
3b36f66b | 1860 | |
6f904d01 | 1861 | return ide_host_add(d, hws, NULL); |
3b36f66b BZ |
1862 | } |
1863 | EXPORT_SYMBOL_GPL(ide_legacy_device_add); |