blob: e299c80c6a578aab36d596faf6e3883c135aec47 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Bartlomiej Zolnierkiewicz59bca8c2008-02-01 23:09:33 +01002 * Copyright (C) 1994-1998 Linus Torvalds & authors (see below)
3 * Copyright (C) 2005, 2007 Bartlomiej Zolnierkiewicz
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 */
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 *
Bartlomiej Zolnierkiewiczbbe4d6d2007-12-12 23:32:00 +010015 * -- increase WAIT_PIDENTIFY to avoid CD-ROM locking at boot
16 * by Andrea Arcangeli
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#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>
FUJITA Tomonoridc817852007-10-23 09:29:58 +020035#include <linux/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036
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
51static void generic_id(ide_drive_t *drive)
52{
53 drive->id->cyls = drive->cyl;
54 drive->id->heads = drive->head;
55 drive->id->sectors = drive->sect;
56 drive->id->cur_cyls = drive->cyl;
57 drive->id->cur_heads = drive->head;
58 drive->id->cur_sectors = drive->sect;
59}
60
61static void ide_disk_init_chs(ide_drive_t *drive)
62{
63 struct hd_driveid *id = drive->id;
64
65 /* Extract geometry if we did not already have one for the drive */
66 if (!drive->cyl || !drive->head || !drive->sect) {
67 drive->cyl = drive->bios_cyl = id->cyls;
68 drive->head = drive->bios_head = id->heads;
69 drive->sect = drive->bios_sect = id->sectors;
70 }
71
72 /* Handle logical geometry translation by the drive */
73 if ((id->field_valid & 1) && id->cur_cyls &&
74 id->cur_heads && (id->cur_heads <= 16) && id->cur_sectors) {
75 drive->cyl = id->cur_cyls;
76 drive->head = id->cur_heads;
77 drive->sect = id->cur_sectors;
78 }
79
80 /* Use physical geometry if what we have still makes no sense */
81 if (drive->head > 16 && id->heads && id->heads <= 16) {
82 drive->cyl = id->cyls;
83 drive->head = id->heads;
84 drive->sect = id->sectors;
85 }
86}
87
88static void ide_disk_init_mult_count(ide_drive_t *drive)
89{
90 struct hd_driveid *id = drive->id;
91
92 drive->mult_count = 0;
93 if (id->max_multsect) {
94#ifdef CONFIG_IDEDISK_MULTI_MODE
95 id->multsect = ((id->max_multsect/2) > 1) ? id->max_multsect : 0;
96 id->multsect_valid = id->multsect ? 1 : 0;
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +010097 drive->mult_req = id->multsect_valid ? id->max_multsect : 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 drive->special.b.set_multmode = drive->mult_req ? 1 : 0;
99#else /* original, pre IDE-NFG, per request of AC */
Bartlomiej Zolnierkiewicz4ee06b72008-01-25 22:17:08 +0100100 drive->mult_req = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 if (drive->mult_req > id->max_multsect)
102 drive->mult_req = id->max_multsect;
103 if (drive->mult_req || ((id->multsect_valid & 1) && id->multsect))
104 drive->special.b.set_multmode = 1;
105#endif
106 }
107}
108
109/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110 * do_identify - identify a drive
111 * @drive: drive to identify
112 * @cmd: command used
113 *
114 * Called when we have issued a drive identify command to
115 * read and parse the results. This function is run with
116 * interrupts disabled.
117 */
118
119static inline void do_identify (ide_drive_t *drive, u8 cmd)
120{
121 ide_hwif_t *hwif = HWIF(drive);
122 int bswap = 1;
123 struct hd_driveid *id;
124
125 id = drive->id;
126 /* read 512 bytes of id info */
127 hwif->ata_input_data(drive, id, SECTOR_WORDS);
128
129 drive->id_read = 1;
130 local_irq_enable();
Bartlomiej Zolnierkiewicz7b9f25b2008-02-01 23:09:28 +0100131#ifdef DEBUG
132 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
133 ide_dump_identify((u8 *)id);
134#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 ide_fix_driveid(id);
136
Robert P. J. Daye71bc142007-07-09 23:17:57 +0200137#if defined (CONFIG_SCSI_EATA_PIO) || defined (CONFIG_SCSI_EATA)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 /*
139 * EATA SCSI controllers do a hardware ATA emulation:
140 * Ignore them if there is a driver for them available.
141 */
142 if ((id->model[0] == 'P' && id->model[1] == 'M') ||
143 (id->model[0] == 'S' && id->model[1] == 'K')) {
144 printk("%s: EATA SCSI HBA %.10s\n", drive->name, id->model);
145 goto err_misc;
146 }
Robert P. J. Daye71bc142007-07-09 23:17:57 +0200147#endif /* CONFIG_SCSI_EATA || CONFIG_SCSI_EATA_PIO */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
149 /*
150 * WIN_IDENTIFY returns little-endian info,
151 * WIN_PIDENTIFY *usually* returns little-endian info.
152 */
153 if (cmd == WIN_PIDENTIFY) {
154 if ((id->model[0] == 'N' && id->model[1] == 'E') /* NEC */
155 || (id->model[0] == 'F' && id->model[1] == 'X') /* Mitsumi */
156 || (id->model[0] == 'P' && id->model[1] == 'i'))/* Pioneer */
157 /* Vertos drives may still be weird */
158 bswap ^= 1;
159 }
160 ide_fixstring(id->model, sizeof(id->model), bswap);
161 ide_fixstring(id->fw_rev, sizeof(id->fw_rev), bswap);
162 ide_fixstring(id->serial_no, sizeof(id->serial_no), bswap);
163
Tejun Heo699b0522007-11-05 21:42:25 +0100164 /* we depend on this a lot! */
165 id->model[sizeof(id->model)-1] = '\0';
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 if (strstr(id->model, "E X A B Y T E N E S T"))
168 goto err_misc;
169
Linus Torvalds1da177e2005-04-16 15:20:36 -0700170 printk("%s: %s, ", drive->name, id->model);
171 drive->present = 1;
172 drive->dead = 0;
173
174 /*
175 * Check for an ATAPI device
176 */
177 if (cmd == WIN_PIDENTIFY) {
178 u8 type = (id->config >> 8) & 0x1f;
179 printk("ATAPI ");
180 switch (type) {
181 case ide_floppy:
182 if (!strstr(id->model, "CD-ROM")) {
183 if (!strstr(id->model, "oppy") &&
184 !strstr(id->model, "poyp") &&
185 !strstr(id->model, "ZIP"))
186 printk("cdrom or floppy?, assuming ");
187 if (drive->media != ide_cdrom) {
188 printk ("FLOPPY");
189 drive->removable = 1;
190 break;
191 }
192 }
193 /* Early cdrom models used zero */
194 type = ide_cdrom;
195 case ide_cdrom:
196 drive->removable = 1;
197#ifdef CONFIG_PPC
198 /* kludge for Apple PowerBook internal zip */
199 if (!strstr(id->model, "CD-ROM") &&
200 strstr(id->model, "ZIP")) {
201 printk ("FLOPPY");
202 type = ide_floppy;
203 break;
204 }
205#endif
206 printk ("CD/DVD-ROM");
207 break;
208 case ide_tape:
209 printk ("TAPE");
210 break;
211 case ide_optical:
212 printk ("OPTICAL");
213 drive->removable = 1;
214 break;
215 default:
216 printk("UNKNOWN (type %d)", type);
217 break;
218 }
219 printk (" drive\n");
220 drive->media = type;
221 /* an ATAPI device ignores DRDY */
222 drive->ready_stat = 0;
223 return;
224 }
225
226 /*
227 * Not an ATAPI device: looks like a "regular" hard disk
228 */
Richard Purdie98109332006-02-03 03:04:55 -0800229
230 /*
231 * 0x848a = CompactFlash device
232 * These are *not* removable in Linux definition of the term
233 */
234
235 if ((id->config != 0x848a) && (id->config & (1<<7)))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 drive->removable = 1;
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 drive->media = ide_disk;
Richard Purdie98109332006-02-03 03:04:55 -0800239 printk("%s DISK drive\n", (id->config == 0x848a) ? "CFA" : "ATA" );
Bartlomiej Zolnierkiewiczcd3dbc92008-01-25 22:17:13 +0100240
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 return;
242
243err_misc:
244 kfree(id);
245 drive->present = 0;
246 return;
247}
248
249/**
250 * actual_try_to_identify - send ata/atapi identify
251 * @drive: drive to identify
252 * @cmd: command to use
253 *
254 * try_to_identify() sends an ATA(PI) IDENTIFY request to a drive
255 * and waits for a response. It also monitors irqs while this is
256 * happening, in hope of automatically determining which one is
257 * being used by the interface.
258 *
259 * Returns: 0 device was identified
260 * 1 device timed-out (no response to identify request)
261 * 2 device aborted the command (refused to identify itself)
262 */
263
264static int actual_try_to_identify (ide_drive_t *drive, u8 cmd)
265{
266 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100267 int use_altstatus = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 unsigned long timeout;
269 u8 s = 0, a = 0;
270
271 /* take a deep breath */
272 msleep(50);
273
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200274 if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100275 a = ide_read_altstatus(drive);
276 s = ide_read_status(drive);
277 if ((a ^ s) & ~INDEX_STAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 /* ancient Seagate drives, broken interfaces */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100279 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
280 "instead of ALTSTATUS(0x%02x)\n",
281 drive->name, s, a);
282 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283 /* use non-intrusive polling */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100284 use_altstatus = 1;
285 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
287 /* set features register for atapi
288 * identify command to be sure of reply
289 */
290 if ((cmd == WIN_PIDENTIFY))
291 /* disable dma & overlap */
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200292 hwif->OUTB(0, hwif->io_ports[IDE_FEATURE_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
294 /* ask drive for ID */
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200295 hwif->OUTB(cmd, hwif->io_ports[IDE_COMMAND_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
297 timeout = ((cmd == WIN_IDENTIFY) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
298 timeout += jiffies;
299 do {
300 if (time_after(jiffies, timeout)) {
301 /* drive timed-out */
302 return 1;
303 }
304 /* give drive a breather */
305 msleep(50);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100306 s = use_altstatus ? ide_read_altstatus(drive)
307 : ide_read_status(drive);
308 } while (s & BUSY_STAT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309
310 /* wait for IRQ and DRQ_STAT */
311 msleep(50);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100312 s = ide_read_status(drive);
313
314 if (OK_STAT(s, DRQ_STAT, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700315 unsigned long flags;
316
317 /* local CPU only; some systems need this */
318 local_irq_save(flags);
319 /* drive returned ID */
320 do_identify(drive, cmd);
321 /* drive responded with ID */
322 rc = 0;
323 /* clear drive IRQ */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100324 (void)ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 local_irq_restore(flags);
326 } else {
327 /* drive refused ID */
328 rc = 2;
329 }
330 return rc;
331}
332
333/**
334 * try_to_identify - try to identify a drive
335 * @drive: drive to probe
336 * @cmd: command to use
337 *
338 * Issue the identify command and then do IRQ probing to
339 * complete the identification when needed by finding the
340 * IRQ the drive is attached to
341 */
342
343static int try_to_identify (ide_drive_t *drive, u8 cmd)
344{
345 ide_hwif_t *hwif = HWIF(drive);
346 int retval;
347 int autoprobe = 0;
348 unsigned long cookie = 0;
349
350 /*
351 * Disable device irq unless we need to
352 * probe for it. Otherwise we'll get spurious
353 * interrupts during the identify-phase that
354 * the irq handler isn't expecting.
355 */
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200356 if (hwif->io_ports[IDE_CONTROL_OFFSET]) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 if (!hwif->irq) {
358 autoprobe = 1;
359 cookie = probe_irq_on();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 }
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100361 ide_set_irq(drive, autoprobe);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362 }
363
364 retval = actual_try_to_identify(drive, cmd);
365
366 if (autoprobe) {
367 int irq;
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100368
369 ide_set_irq(drive, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 /* clear drive IRQ */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100371 (void)ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 udelay(5);
373 irq = probe_irq_off(cookie);
374 if (!hwif->irq) {
375 if (irq > 0) {
376 hwif->irq = irq;
377 } else {
378 /* Mmmm.. multiple IRQs..
379 * don't know which was ours
380 */
381 printk("%s: IRQ probe failed (0x%lx)\n",
382 drive->name, cookie);
383 }
384 }
385 }
386 return retval;
387}
388
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100389static int ide_busy_sleep(ide_hwif_t *hwif)
390{
391 unsigned long timeout = jiffies + WAIT_WORSTCASE;
392 u8 stat;
393
394 do {
395 msleep(50);
396 stat = hwif->INB(hwif->io_ports[IDE_STATUS_OFFSET]);
397 if ((stat & BUSY_STAT) == 0)
398 return 0;
399 } while (time_before(jiffies, timeout));
400
401 return 1;
402}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403
404/**
405 * do_probe - probe an IDE device
406 * @drive: drive to probe
407 * @cmd: command to use
408 *
409 * do_probe() has the difficult job of finding a drive if it exists,
410 * without getting hung up if it doesn't exist, without trampling on
411 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
412 *
413 * If a drive is "known" to exist (from CMOS or kernel parameters),
414 * but does not respond right away, the probe will "hang in there"
415 * for the maximum wait time (about 30 seconds), otherwise it will
416 * exit much more quickly.
417 *
418 * Returns: 0 device was identified
419 * 1 device timed-out (no response to identify request)
420 * 2 device aborted the command (refused to identify itself)
421 * 3 bad status from device (possible for ATAPI drives)
422 * 4 probe was not attempted because failure was obvious
423 */
424
425static int do_probe (ide_drive_t *drive, u8 cmd)
426{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100428 int rc;
429 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
431 if (drive->present) {
432 /* avoid waiting for inappropriate probes */
433 if ((drive->media != ide_disk) && (cmd == WIN_IDENTIFY))
434 return 4;
435 }
436#ifdef DEBUG
437 printk("probing for %s: present=%d, media=%d, probetype=%s\n",
438 drive->name, drive->present, drive->media,
439 (cmd == WIN_IDENTIFY) ? "ATA" : "ATAPI");
440#endif
441
442 /* needed for some systems
443 * (e.g. crw9624 as drive0 with disk as slave)
444 */
445 msleep(50);
446 SELECT_DRIVE(drive);
447 msleep(50);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200448 if (hwif->INB(hwif->io_ports[IDE_SELECT_OFFSET]) != drive->select.all &&
449 !drive->present) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 if (drive->select.b.unit != 0) {
451 /* exit with drive0 selected */
452 SELECT_DRIVE(&hwif->drives[0]);
453 /* allow BUSY_STAT to assert & clear */
454 msleep(50);
455 }
456 /* no i/f present: mmm.. this should be a 4 -ml */
457 return 3;
458 }
459
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100460 stat = ide_read_status(drive);
461
462 if (OK_STAT(stat, READY_STAT, BUSY_STAT) ||
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 drive->present || cmd == WIN_PIDENTIFY) {
464 /* send cmd and wait */
465 if ((rc = try_to_identify(drive, cmd))) {
466 /* failed: try again */
467 rc = try_to_identify(drive,cmd);
468 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100469
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100470 stat = ide_read_status(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100471
472 if (stat == (BUSY_STAT | READY_STAT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 return 4;
474
475 if ((rc == 1 && cmd == WIN_PIDENTIFY) &&
476 ((drive->autotune == IDE_TUNE_DEFAULT) ||
477 (drive->autotune == IDE_TUNE_AUTO))) {
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100478 printk(KERN_ERR "%s: no response (status = 0x%02x), "
479 "resetting drive\n", drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480 msleep(50);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200481 hwif->OUTB(drive->select.all,
482 hwif->io_ports[IDE_SELECT_OFFSET]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483 msleep(50);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200484 hwif->OUTB(WIN_SRST,
485 hwif->io_ports[IDE_COMMAND_OFFSET]);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100486 (void)ide_busy_sleep(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 rc = try_to_identify(drive, cmd);
488 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100489
490 /* ensure drive IRQ is clear */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100491 stat = ide_read_status(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100492
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 if (rc == 1)
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100494 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
495 drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 } else {
497 /* not present or maybe ATAPI */
498 rc = 3;
499 }
500 if (drive->select.b.unit != 0) {
501 /* exit with drive0 selected */
502 SELECT_DRIVE(&hwif->drives[0]);
503 msleep(50);
504 /* ensure drive irq is clear */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100505 (void)ide_read_status(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 }
507 return rc;
508}
509
510/*
511 *
512 */
513static void enable_nest (ide_drive_t *drive)
514{
515 ide_hwif_t *hwif = HWIF(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100516 u8 stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517
518 printk("%s: enabling %s -- ", hwif->name, drive->id->model);
519 SELECT_DRIVE(drive);
520 msleep(50);
Bartlomiej Zolnierkiewicz23579a22008-04-18 00:46:26 +0200521 hwif->OUTB(EXABYTE_ENABLE_NEST, hwif->io_ports[IDE_COMMAND_OFFSET]);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100522
523 if (ide_busy_sleep(hwif)) {
524 printk(KERN_CONT "failed (timeout)\n");
525 return;
526 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527
528 msleep(50);
529
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100530 stat = ide_read_status(drive);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100531
532 if (!OK_STAT(stat, 0, BAD_STAT))
533 printk(KERN_CONT "failed (status = 0x%02x)\n", stat);
534 else
535 printk(KERN_CONT "success\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536
537 /* if !(success||timed-out) */
538 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
539 /* look for ATAPI device */
540 (void) do_probe(drive, WIN_PIDENTIFY);
541 }
542}
543
544/**
545 * probe_for_drives - upper level drive probe
546 * @drive: drive to probe for
547 *
548 * probe_for_drive() tests for existence of a given drive using do_probe()
549 * and presents things to the user as needed.
550 *
551 * Returns: 0 no device was found
552 * 1 device was found (note: drive->present might
553 * still be 0)
554 */
555
556static inline u8 probe_for_drive (ide_drive_t *drive)
557{
558 /*
559 * In order to keep things simple we have an id
560 * block for all drives at all times. If the device
561 * is pre ATA or refuses ATA/ATAPI identify we
562 * will add faked data to this.
563 *
564 * Also note that 0 everywhere means "can't do X"
565 */
566
Deepak Saxenaf5e3c2f2005-11-07 01:01:25 -0800567 drive->id = kzalloc(SECTOR_WORDS *4, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700568 drive->id_read = 0;
569 if(drive->id == NULL)
570 {
571 printk(KERN_ERR "ide: out of memory for id data.\n");
572 return 0;
573 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 strcpy(drive->id->model, "UNKNOWN");
575
576 /* skip probing? */
577 if (!drive->noprobe)
578 {
579 /* if !(success||timed-out) */
580 if (do_probe(drive, WIN_IDENTIFY) >= 2) {
581 /* look for ATAPI device */
582 (void) do_probe(drive, WIN_PIDENTIFY);
583 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 if (!drive->present)
585 /* drive not found */
586 return 0;
Alan Cox78595572007-07-03 22:28:35 +0200587 if (strstr(drive->id->model, "E X A B Y T E N E S T"))
588 enable_nest(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 /* identification failed? */
591 if (!drive->id_read) {
592 if (drive->media == ide_disk) {
593 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
594 drive->name, drive->cyl,
595 drive->head, drive->sect);
596 } else if (drive->media == ide_cdrom) {
597 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
598 } else {
599 /* nuke it */
600 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
601 drive->present = 0;
602 }
603 }
604 /* drive was found */
605 }
606 if(!drive->present)
607 return 0;
608 /* The drive wasn't being helpful. Add generic info only */
609 if (drive->id_read == 0) {
610 generic_id(drive);
611 return 1;
612 }
613
614 if (drive->media == ide_disk) {
615 ide_disk_init_chs(drive);
616 ide_disk_init_mult_count(drive);
617 }
618
619 return drive->present;
620}
621
622static void hwif_release_dev (struct device *dev)
623{
624 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
625
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800626 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700627}
628
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200629static int ide_register_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700630{
Randy Dunlap349ae232006-10-03 01:14:23 -0700631 int ret;
632
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 /* register with global device tree */
634 strlcpy(hwif->gendev.bus_id,hwif->name,BUS_ID_SIZE);
635 hwif->gendev.driver_data = hwif;
636 if (hwif->gendev.parent == NULL) {
Bartlomiej Zolnierkiewicz36501652008-02-01 23:09:31 +0100637 if (hwif->dev)
638 hwif->gendev.parent = hwif->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 else
640 /* Would like to do = &device_legacy */
641 hwif->gendev.parent = NULL;
642 }
643 hwif->gendev.release = hwif_release_dev;
Randy Dunlap349ae232006-10-03 01:14:23 -0700644 ret = device_register(&hwif->gendev);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200645 if (ret < 0) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700646 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
647 __FUNCTION__, ret);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200648 goto out;
649 }
650
651 get_device(&hwif->gendev);
652
653 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
654 MKDEV(0, 0), hwif->name);
655 if (IS_ERR(hwif->portdev)) {
656 ret = PTR_ERR(hwif->portdev);
657 device_unregister(&hwif->gendev);
658 }
659 dev_set_drvdata(hwif->portdev, hwif);
660out:
661 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662}
663
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100664/**
665 * ide_port_wait_ready - wait for port to become ready
666 * @hwif: IDE port
667 *
668 * This is needed on some PPCs and a bunch of BIOS-less embedded
669 * platforms. Typical cases are:
670 *
671 * - The firmware hard reset the disk before booting the kernel,
672 * the drive is still doing it's poweron-reset sequence, that
673 * can take up to 30 seconds.
674 *
675 * - The firmware does nothing (or no firmware), the device is
676 * still in POST state (same as above actually).
677 *
678 * - Some CD/DVD/Writer combo drives tend to drive the bus during
679 * their reset sequence even when they are non-selected slave
680 * devices, thus preventing discovery of the main HD.
681 *
682 * Doing this wait-for-non-busy should not harm any existing
683 * configuration and fix some issues like the above.
684 *
685 * BenH.
686 *
687 * Returns 0 on success, error code (< 0) otherwise.
688 */
689
690static int ide_port_wait_ready(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
Jonas Stare82661052007-11-27 21:35:53 +0100692 int unit, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
694 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
695
696 /* Let HW settle down a bit from whatever init state we
697 * come from */
698 mdelay(2);
699
700 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
701 * I know of at least one disk who takes 31 seconds, I use 35
702 * here to be safe
703 */
704 rc = ide_wait_not_busy(hwif, 35000);
705 if (rc)
706 return rc;
707
708 /* Now make sure both master & slave are ready */
Jonas Stare82661052007-11-27 21:35:53 +0100709 for (unit = 0; unit < MAX_DRIVES; unit++) {
710 ide_drive_t *drive = &hwif->drives[unit];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711
Jonas Stare82661052007-11-27 21:35:53 +0100712 /* Ignore disks that we will not probe for later. */
713 if (!drive->noprobe || drive->present) {
714 SELECT_DRIVE(drive);
Bartlomiej Zolnierkiewicz81ca6912008-01-26 20:13:08 +0100715 ide_set_irq(drive, 1);
Jonas Stare82661052007-11-27 21:35:53 +0100716 mdelay(2);
717 rc = ide_wait_not_busy(hwif, 35000);
718 if (rc)
719 goto out;
720 } else
721 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
722 drive->name);
723 }
724out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 /* Exit function with master reselected (let's be sane) */
Jonas Stare82661052007-11-27 21:35:53 +0100726 if (unit)
727 SELECT_DRIVE(&hwif->drives[0]);
728
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729 return rc;
730}
731
732/**
733 * ide_undecoded_slave - look for bad CF adapters
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100734 * @drive1: drive
Linus Torvalds1da177e2005-04-16 15:20:36 -0700735 *
736 * Analyse the drives on the interface and attempt to decide if we
737 * have the same drive viewed twice. This occurs with crap CF adapters
738 * and PCMCIA sometimes.
739 */
740
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100741void ide_undecoded_slave(ide_drive_t *drive1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742{
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100743 ide_drive_t *drive0 = &drive1->hwif->drives[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700744
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100745 if ((drive1->dn & 1) == 0 || drive0->present == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746 return;
747
748 /* If the models don't match they are not the same product */
749 if (strcmp(drive0->id->model, drive1->id->model))
750 return;
751
752 /* Serial numbers do not match */
753 if (strncmp(drive0->id->serial_no, drive1->id->serial_no, 20))
754 return;
755
756 /* No serial number, thankfully very rare for CF */
757 if (drive0->id->serial_no[0] == 0)
758 return;
759
760 /* Appears to be an IDE flash adapter with decode bugs */
761 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
762
763 drive1->present = 0;
764}
765
766EXPORT_SYMBOL_GPL(ide_undecoded_slave);
767
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100768static int ide_probe_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700770 unsigned long flags;
771 unsigned int irqd;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100772 int unit, rc = -ENODEV;
773
774 BUG_ON(hwif->present);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Bartlomiej Zolnierkiewicze53cd452008-04-26 22:25:16 +0200776 if (hwif->drives[0].noprobe && hwif->drives[1].noprobe)
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100777 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 /*
780 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
781 * we'll install our IRQ driver much later...
782 */
783 irqd = hwif->irq;
784 if (irqd)
785 disable_irq(hwif->irq);
786
787 local_irq_set(flags);
788
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100789 if (ide_port_wait_ready(hwif) == -EBUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700790 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
791
792 /*
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100793 * Second drive should only exist if first drive was found,
794 * but a lot of cdrom drives are configured as single slaves.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 */
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100796 for (unit = 0; unit < MAX_DRIVES; ++unit) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 ide_drive_t *drive = &hwif->drives[unit];
798 drive->dn = (hwif->channel ? 2 : 0) + unit;
799 (void) probe_for_drive(drive);
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100800 if (drive->present)
801 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 }
803 if (hwif->io_ports[IDE_CONTROL_OFFSET] && hwif->reset) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804 printk(KERN_WARNING "%s: reset\n", hwif->name);
805 hwif->OUTB(12, hwif->io_ports[IDE_CONTROL_OFFSET]);
806 udelay(10);
807 hwif->OUTB(8, hwif->io_ports[IDE_CONTROL_OFFSET]);
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100808 (void)ide_busy_sleep(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 }
810 local_irq_restore(flags);
811 /*
812 * Use cached IRQ number. It might be (and is...) changed by probe
813 * code above
814 */
815 if (irqd)
816 enable_irq(irqd);
817
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100818 return rc;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100819}
820
821static void ide_port_tune_devices(ide_hwif_t *hwif)
822{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200823 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100824 int unit;
825
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100826 for (unit = 0; unit < MAX_DRIVES; unit++) {
827 ide_drive_t *drive = &hwif->drives[unit];
828
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200829 if (drive->present && port_ops && port_ops->quirkproc)
830 port_ops->quirkproc(drive);
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100831 }
Bartlomiej Zolnierkiewicz0380dad2007-06-08 15:14:29 +0200832
Linus Torvalds1da177e2005-04-16 15:20:36 -0700833 for (unit = 0; unit < MAX_DRIVES; ++unit) {
834 ide_drive_t *drive = &hwif->drives[unit];
835
836 if (drive->present) {
Bartlomiej Zolnierkiewicz26bcb872007-10-11 23:54:00 +0200837 if (drive->autotune == IDE_TUNE_AUTO)
838 ide_set_max_pio(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839
840 if (drive->autotune != IDE_TUNE_DEFAULT &&
841 drive->autotune != IDE_TUNE_AUTO)
842 continue;
843
844 drive->nice1 = 1;
845
Bartlomiej Zolnierkiewicz15ce9262008-01-26 20:13:03 +0100846 if (hwif->dma_host_set)
Bartlomiej Zolnierkiewicz8c0697c2007-10-16 22:29:58 +0200847 ide_set_dma(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848 }
849 }
Kumar Gala208a08f2006-03-24 03:18:21 -0800850
851 for (unit = 0; unit < MAX_DRIVES; ++unit) {
852 ide_drive_t *drive = &hwif->drives[unit];
853
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +0100854 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
Kumar Gala208a08f2006-03-24 03:18:21 -0800855 drive->no_io_32bit = 1;
856 else
857 drive->no_io_32bit = drive->id->dword_io ? 1 : 0;
858 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700859}
860
Linus Torvalds1da177e2005-04-16 15:20:36 -0700861#if MAX_HWIFS > 1
862/*
863 * save_match() is used to simplify logic in init_irq() below.
864 *
865 * A loophole here is that we may not know about a particular
866 * hwif's irq until after that hwif is actually probed/initialized..
867 * This could be a problem for the case where an hwif is on a
868 * dual interface that requires serialization (eg. cmd640) and another
869 * hwif using one of the same irqs is initialized beforehand.
870 *
871 * This routine detects and reports such situations, but does not fix them.
872 */
873static void save_match(ide_hwif_t *hwif, ide_hwif_t *new, ide_hwif_t **match)
874{
875 ide_hwif_t *m = *match;
876
877 if (m && m->hwgroup && m->hwgroup != new->hwgroup) {
878 if (!new->hwgroup)
879 return;
880 printk("%s: potential irq problem with %s and %s\n",
881 hwif->name, new->name, m->name);
882 }
883 if (!m || m->irq != hwif->irq) /* don't undo a prior perfect match */
884 *match = new;
885}
886#endif /* MAX_HWIFS > 1 */
887
888/*
889 * init request queue
890 */
891static int ide_init_queue(ide_drive_t *drive)
892{
Jens Axboe165125e2007-07-24 09:28:11 +0200893 struct request_queue *q;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 ide_hwif_t *hwif = HWIF(drive);
895 int max_sectors = 256;
896 int max_sg_entries = PRD_ENTRIES;
897
898 /*
899 * Our default set up assumes the normal IDE case,
900 * that is 64K segmenting, standard PRD setup
901 * and LBA28. Some drivers then impose their own
902 * limits and LBA48 we could raise it but as yet
903 * do not.
904 */
Christoph Lameter19460892005-06-23 00:08:19 -0700905
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -0700906 q = blk_init_queue_node(do_ide_request, &ide_lock, hwif_to_node(hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (!q)
908 return 1;
909
910 q->queuedata = drive;
911 blk_queue_segment_boundary(q, 0xffff);
912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913 if (hwif->rqsize < max_sectors)
914 max_sectors = hwif->rqsize;
915 blk_queue_max_sectors(q, max_sectors);
916
917#ifdef CONFIG_PCI
918 /* When we have an IOMMU, we may have a problem where pci_map_sg()
919 * creates segments that don't completely match our boundary
920 * requirements and thus need to be broken up again. Because it
921 * doesn't align properly either, we may actually have to break up
922 * to more segments than what was we got in the first place, a max
923 * worst case is twice as many.
924 * This will be fixed once we teach pci_map_sg() about our boundary
925 * requirements, hopefully soon. *FIXME*
926 */
927 if (!PCI_DMA_BUS_IS_PHYS)
928 max_sg_entries >>= 1;
929#endif /* CONFIG_PCI */
930
931 blk_queue_max_hw_segments(q, max_sg_entries);
932 blk_queue_max_phys_segments(q, max_sg_entries);
933
934 /* assign drive queue */
935 drive->queue = q;
936
937 /* needs drive->queue to be set */
938 ide_toggle_bounce(drive, 1);
939
Linus Torvalds1da177e2005-04-16 15:20:36 -0700940 return 0;
941}
942
Bartlomiej Zolnierkiewicz0947e0d2008-02-02 19:56:41 +0100943static void ide_add_drive_to_hwgroup(ide_drive_t *drive)
944{
945 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
946
947 spin_lock_irq(&ide_lock);
948 if (!hwgroup->drive) {
949 /* first drive for hwgroup. */
950 drive->next = drive;
951 hwgroup->drive = drive;
952 hwgroup->hwif = HWIF(hwgroup->drive);
953 } else {
954 drive->next = hwgroup->drive->next;
955 hwgroup->drive->next = drive;
956 }
957 spin_unlock_irq(&ide_lock);
958}
959
Linus Torvalds1da177e2005-04-16 15:20:36 -0700960/*
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100961 * For any present drive:
962 * - allocate the block device queue
963 * - link drive into the hwgroup
964 */
965static void ide_port_setup_devices(ide_hwif_t *hwif)
966{
967 int i;
968
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200969 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100970 for (i = 0; i < MAX_DRIVES; i++) {
971 ide_drive_t *drive = &hwif->drives[i];
972
973 if (!drive->present)
974 continue;
975
976 if (ide_init_queue(drive)) {
977 printk(KERN_ERR "ide: failed to init %s\n",
978 drive->name);
979 continue;
980 }
981
982 ide_add_drive_to_hwgroup(drive);
983 }
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200984 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100985}
986
987/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988 * This routine sets up the irq for an ide interface, and creates a new
989 * hwgroup for the irq/hwif if none was previously assigned.
990 *
991 * Much of the code is for correctly detecting/handling irq sharing
992 * and irq serialization situations. This is somewhat complex because
993 * it handles static as well as dynamic (PCMCIA) IDE interfaces.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 */
995static int init_irq (ide_hwif_t *hwif)
996{
997 unsigned int index;
998 ide_hwgroup_t *hwgroup;
999 ide_hwif_t *match = NULL;
1000
1001
1002 BUG_ON(in_interrupt());
1003 BUG_ON(irqs_disabled());
Ravikiran G Thirumalai556e58f2005-08-04 12:53:26 -07001004 BUG_ON(hwif == NULL);
1005
Matthias Kaehlckeef298882007-07-09 23:17:55 +02001006 mutex_lock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 hwif->hwgroup = NULL;
1008#if MAX_HWIFS > 1
1009 /*
1010 * Group up with any other hwifs that share our irq(s).
1011 */
1012 for (index = 0; index < MAX_HWIFS; index++) {
1013 ide_hwif_t *h = &ide_hwifs[index];
1014 if (h->hwgroup) { /* scan only initialized hwif's */
1015 if (hwif->irq == h->irq) {
1016 hwif->sharing_irq = h->sharing_irq = 1;
1017 if (hwif->chipset != ide_pci ||
1018 h->chipset != ide_pci) {
1019 save_match(hwif, h, &match);
1020 }
1021 }
1022 if (hwif->serialized) {
1023 if (hwif->mate && hwif->mate->irq == h->irq)
1024 save_match(hwif, h, &match);
1025 }
1026 if (h->serialized) {
1027 if (h->mate && hwif->irq == h->mate->irq)
1028 save_match(hwif, h, &match);
1029 }
1030 }
1031 }
1032#endif /* MAX_HWIFS > 1 */
1033 /*
1034 * If we are still without a hwgroup, then form a new one
1035 */
1036 if (match) {
1037 hwgroup = match->hwgroup;
1038 hwif->hwgroup = hwgroup;
1039 /*
1040 * Link us into the hwgroup.
1041 * This must be done early, do ensure that unexpected_intr
1042 * can find the hwif and prevent irq storms.
1043 * No drives are attached to the new hwif, choose_drive
1044 * can't do anything stupid (yet).
1045 * Add ourself as the 2nd entry to the hwgroup->hwif
1046 * linked list, the first entry is the hwif that owns
1047 * hwgroup->handler - do not change that.
1048 */
1049 spin_lock_irq(&ide_lock);
1050 hwif->next = hwgroup->hwif->next;
1051 hwgroup->hwif->next = hwif;
Bartlomiej Zolnierkiewiczcae5c822008-02-01 23:09:36 +01001052 BUG_ON(hwif->next == hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 spin_unlock_irq(&ide_lock);
1054 } else {
Bartlomiej Zolnierkiewicz422278e2008-02-01 23:09:35 +01001055 hwgroup = kmalloc_node(sizeof(*hwgroup), GFP_KERNEL|__GFP_ZERO,
1056 hwif_to_node(hwif));
1057 if (hwgroup == NULL)
1058 goto out_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001059
1060 hwif->hwgroup = hwgroup;
Bartlomiej Zolnierkiewicz422278e2008-02-01 23:09:35 +01001061 hwgroup->hwif = hwif->next = hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 init_timer(&hwgroup->timer);
1064 hwgroup->timer.function = &ide_timer_expiry;
1065 hwgroup->timer.data = (unsigned long) hwgroup;
1066 }
1067
1068 /*
1069 * Allocate the irq, if not already obtained for another hwif
1070 */
1071 if (!match || match->irq != hwif->irq) {
Bartlomiej Zolnierkiewicz7b5da4b2008-01-25 22:17:08 +01001072 int sa = 0;
Adrian Bunk7b892802008-02-06 01:36:29 -08001073#if defined(__mc68000__)
Thomas Gleixner362537b2006-07-01 19:29:34 -07001074 sa = IRQF_SHARED;
Bartlomiej Zolnierkiewicze1771e22008-02-11 00:32:15 +01001075#endif /* __mc68000__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
Bartlomiej Zolnierkiewicz7b5da4b2008-01-25 22:17:08 +01001077 if (IDE_CHIPSET_IS_PCI(hwif->chipset))
Thomas Gleixner362537b2006-07-01 19:29:34 -07001078 sa = IRQF_SHARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079
1080 if (hwif->io_ports[IDE_CONTROL_OFFSET])
1081 /* clear nIEN */
1082 hwif->OUTB(0x08, hwif->io_ports[IDE_CONTROL_OFFSET]);
1083
1084 if (request_irq(hwif->irq,&ide_intr,sa,hwif->name,hwgroup))
1085 goto out_unlink;
1086 }
1087
Bartlomiej Zolnierkiewicz8a0e7e12008-02-02 19:56:41 +01001088 if (!hwif->rqsize) {
1089 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1090 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1091 hwif->rqsize = 256;
1092 else
1093 hwif->rqsize = 65536;
1094 }
1095
Adrian Bunk7b892802008-02-06 01:36:29 -08001096#if !defined(__mc68000__)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001097 printk("%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
1098 hwif->io_ports[IDE_DATA_OFFSET],
1099 hwif->io_ports[IDE_DATA_OFFSET]+7,
1100 hwif->io_ports[IDE_CONTROL_OFFSET], hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001101#else
1102 printk("%s at 0x%08lx on irq %d", hwif->name,
1103 hwif->io_ports[IDE_DATA_OFFSET], hwif->irq);
Adrian Bunk7b892802008-02-06 01:36:29 -08001104#endif /* __mc68000__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 if (match)
1106 printk(" (%sed with %s)",
1107 hwif->sharing_irq ? "shar" : "serializ", match->name);
1108 printk("\n");
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +01001109
Matthias Kaehlckeef298882007-07-09 23:17:55 +02001110 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 return 0;
1112out_unlink:
Bartlomiej Zolnierkiewiczfbd13082008-02-01 23:09:36 +01001113 ide_remove_port_from_hwgroup(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001114out_up:
Matthias Kaehlckeef298882007-07-09 23:17:55 +02001115 mutex_unlock(&ide_cfg_mtx);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 return 1;
1117}
1118
1119static int ata_lock(dev_t dev, void *data)
1120{
1121 /* FIXME: we want to pin hwif down */
1122 return 0;
1123}
1124
1125static struct kobject *ata_probe(dev_t dev, int *part, void *data)
1126{
1127 ide_hwif_t *hwif = data;
1128 int unit = *part >> PARTN_BITS;
1129 ide_drive_t *drive = &hwif->drives[unit];
1130 if (!drive->present)
1131 return NULL;
1132
1133 if (drive->media == ide_disk)
1134 request_module("ide-disk");
1135 if (drive->scsi)
1136 request_module("ide-scsi");
1137 if (drive->media == ide_cdrom || drive->media == ide_optical)
1138 request_module("ide-cd");
1139 if (drive->media == ide_tape)
1140 request_module("ide-tape");
1141 if (drive->media == ide_floppy)
1142 request_module("ide-floppy");
1143
1144 return NULL;
1145}
1146
1147static struct kobject *exact_match(dev_t dev, int *part, void *data)
1148{
1149 struct gendisk *p = data;
1150 *part &= (1 << PARTN_BITS) - 1;
Kay Sieversedfaa7c2007-05-21 22:08:01 +02001151 return &p->dev.kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001152}
1153
1154static int exact_lock(dev_t dev, void *data)
1155{
1156 struct gendisk *p = data;
1157
1158 if (!get_disk(p))
1159 return -1;
1160 return 0;
1161}
1162
1163void ide_register_region(struct gendisk *disk)
1164{
1165 blk_register_region(MKDEV(disk->major, disk->first_minor),
1166 disk->minors, NULL, exact_match, exact_lock, disk);
1167}
1168
1169EXPORT_SYMBOL_GPL(ide_register_region);
1170
1171void ide_unregister_region(struct gendisk *disk)
1172{
1173 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
1174 disk->minors);
1175}
1176
1177EXPORT_SYMBOL_GPL(ide_unregister_region);
1178
1179void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
1180{
1181 ide_hwif_t *hwif = drive->hwif;
1182 unsigned int unit = (drive->select.all >> 4) & 1;
1183
1184 disk->major = hwif->major;
1185 disk->first_minor = unit << PARTN_BITS;
1186 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
1187 disk->queue = drive->queue;
1188}
1189
1190EXPORT_SYMBOL_GPL(ide_init_disk);
1191
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001192static void ide_remove_drive_from_hwgroup(ide_drive_t *drive)
1193{
1194 ide_hwgroup_t *hwgroup = drive->hwif->hwgroup;
1195
1196 if (drive == drive->next) {
1197 /* special case: last drive from hwgroup. */
1198 BUG_ON(hwgroup->drive != drive);
1199 hwgroup->drive = NULL;
1200 } else {
1201 ide_drive_t *walk;
1202
1203 walk = hwgroup->drive;
1204 while (walk->next != drive)
1205 walk = walk->next;
1206 walk->next = drive->next;
1207 if (hwgroup->drive == drive) {
1208 hwgroup->drive = drive->next;
1209 hwgroup->hwif = hwgroup->drive->hwif;
1210 }
1211 }
1212 BUG_ON(hwgroup->drive == drive);
1213}
1214
Linus Torvalds1da177e2005-04-16 15:20:36 -07001215static void drive_release_dev (struct device *dev)
1216{
1217 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
1218
Bartlomiej Zolnierkiewicz5b0c4b32008-04-18 00:46:22 +02001219 ide_proc_unregister_device(drive);
1220
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001221 spin_lock_irq(&ide_lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001222 ide_remove_drive_from_hwgroup(drive);
Jesper Juhl6044ec82005-11-07 01:01:32 -08001223 kfree(drive->id);
1224 drive->id = NULL;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +02001225 drive->present = 0;
1226 /* Messed up locking ... */
1227 spin_unlock_irq(&ide_lock);
1228 blk_cleanup_queue(drive->queue);
1229 spin_lock_irq(&ide_lock);
1230 drive->queue = NULL;
1231 spin_unlock_irq(&ide_lock);
1232
Aleksey Makarovf36d4022006-01-09 15:59:27 -08001233 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001234}
1235
Bartlomiej Zolnierkiewicz0e335552008-04-18 00:46:33 +02001236#ifndef ide_default_irq
1237#define ide_default_irq(irq) 0
1238#endif
1239
Linus Torvalds1da177e2005-04-16 15:20:36 -07001240static int hwif_init(ide_hwif_t *hwif)
1241{
1242 int old_irq;
1243
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244 if (!hwif->irq) {
1245 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET])))
1246 {
1247 printk("%s: DISABLED, NO IRQ\n", hwif->name);
Bartlomiej Zolnierkiewicz48535652008-02-01 23:09:34 +01001248 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249 }
1250 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251
Linus Torvalds1da177e2005-04-16 15:20:36 -07001252 if (register_blkdev(hwif->major, hwif->name))
1253 return 0;
1254
1255 if (!hwif->sg_max_nents)
1256 hwif->sg_max_nents = PRD_ENTRIES;
1257
Jens Axboe45711f12007-10-22 21:19:53 +02001258 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259 GFP_KERNEL);
1260 if (!hwif->sg_table) {
1261 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
1262 goto out;
1263 }
Jens Axboe45711f12007-10-22 21:19:53 +02001264
1265 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266
1267 if (init_irq(hwif) == 0)
1268 goto done;
1269
1270 old_irq = hwif->irq;
1271 /*
1272 * It failed to initialise. Find the default IRQ for
1273 * this port and try that.
1274 */
1275 if (!(hwif->irq = ide_default_irq(hwif->io_ports[IDE_DATA_OFFSET]))) {
1276 printk("%s: Disabled unable to get IRQ %d.\n",
1277 hwif->name, old_irq);
1278 goto out;
1279 }
1280 if (init_irq(hwif)) {
1281 printk("%s: probed IRQ %d and default IRQ %d failed.\n",
1282 hwif->name, old_irq, hwif->irq);
1283 goto out;
1284 }
1285 printk("%s: probed IRQ %d failed, using default.\n",
1286 hwif->name, hwif->irq);
1287
1288done:
Bartlomiej Zolnierkiewicz3a4e7c92008-02-02 19:56:40 +01001289 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1290 THIS_MODULE, ata_probe, ata_lock, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291 return 1;
1292
1293out:
1294 unregister_blkdev(hwif->major, hwif->name);
1295 return 0;
1296}
1297
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001298static void hwif_register_devices(ide_hwif_t *hwif)
1299{
1300 unsigned int i;
1301
1302 for (i = 0; i < MAX_DRIVES; i++) {
1303 ide_drive_t *drive = &hwif->drives[i];
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001304 struct device *dev = &drive->gendev;
1305 int ret;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001306
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001307 if (!drive->present)
1308 continue;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001309
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001310 ide_add_generic_settings(drive);
1311
1312 snprintf(dev->bus_id, BUS_ID_SIZE, "%u.%u", hwif->index, i);
1313 dev->parent = &hwif->gendev;
1314 dev->bus = &ide_bus_type;
1315 dev->driver_data = drive;
1316 dev->release = drive_release_dev;
1317
1318 ret = device_register(dev);
1319 if (ret < 0)
1320 printk(KERN_WARNING "IDE: %s: device_register error: "
1321 "%d\n", __func__, ret);
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001322 }
1323}
1324
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001325static void ide_port_init_devices(ide_hwif_t *hwif)
1326{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001327 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001328 int i;
1329
1330 for (i = 0; i < MAX_DRIVES; i++) {
1331 ide_drive_t *drive = &hwif->drives[i];
1332
1333 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1334 drive->io_32bit = 1;
1335 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
1336 drive->unmask = 1;
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +01001337 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
1338 drive->no_unmask = 1;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001339 if ((hwif->host_flags & IDE_HFLAG_NO_AUTOTUNE) == 0)
1340 drive->autotune = 1;
1341 }
Bartlomiej Zolnierkiewicz1f2cf8b2008-02-02 19:56:40 +01001342
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001343 if (port_ops && port_ops->port_init_devs)
1344 port_ops->port_init_devs(hwif);
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001345}
1346
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001347static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1348 const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001349{
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001350 if (d->chipset != ide_etrax100)
1351 hwif->channel = port;
1352
1353 if (d->chipset)
1354 hwif->chipset = d->chipset;
1355
1356 if (d->init_iops)
1357 d->init_iops(hwif);
1358
1359 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0)
1360 ide_hwif_setup_dma(hwif, d);
1361
1362 if ((!hwif->irq && (d->host_flags & IDE_HFLAG_LEGACY_IRQS)) ||
1363 (d->host_flags & IDE_HFLAG_FORCE_LEGACY_IRQS))
1364 hwif->irq = port ? 15 : 14;
1365
1366 hwif->host_flags = d->host_flags;
1367 hwif->pio_mask = d->pio_mask;
1368
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001369 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1370 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1371 hwif->port_ops = d->port_ops;
1372
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001373 if ((d->host_flags & IDE_HFLAG_SERIALIZE) && hwif->mate)
1374 hwif->mate->serialized = hwif->serialized = 1;
1375
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001376 hwif->swdma_mask = d->swdma_mask;
1377 hwif->mwdma_mask = d->mwdma_mask;
1378 hwif->ultra_mask = d->udma_mask;
1379
1380 /* reset DMA masks only for SFF-style DMA controllers */
Bartlomiej Zolnierkiewicz42800942008-02-11 00:32:15 +01001381 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0 && hwif->dma_base == 0)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001382 hwif->swdma_mask = hwif->mwdma_mask = hwif->ultra_mask = 0;
1383
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001384 if (d->host_flags & IDE_HFLAG_RQSIZE_256)
1385 hwif->rqsize = 256;
1386
1387 /* call chipset specific routine for each enabled port */
1388 if (d->init_hwif)
1389 d->init_hwif(hwif);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001390}
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001391
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001392static void ide_port_cable_detect(ide_hwif_t *hwif)
1393{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001394 const struct ide_port_ops *port_ops = hwif->port_ops;
1395
1396 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001397 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001398 hwif->cbl = port_ops->cable_detect(hwif);
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001399 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001400}
1401
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +02001402static ssize_t store_delete_devices(struct device *portdev,
1403 struct device_attribute *attr,
1404 const char *buf, size_t n)
1405{
1406 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1407
1408 if (strncmp(buf, "1", n))
1409 return -EINVAL;
1410
1411 ide_port_unregister_devices(hwif);
1412
1413 return n;
1414};
1415
1416static DEVICE_ATTR(delete_devices, S_IWUSR, NULL, store_delete_devices);
1417
1418static ssize_t store_scan(struct device *portdev,
1419 struct device_attribute *attr,
1420 const char *buf, size_t n)
1421{
1422 ide_hwif_t *hwif = dev_get_drvdata(portdev);
1423
1424 if (strncmp(buf, "1", n))
1425 return -EINVAL;
1426
1427 ide_port_unregister_devices(hwif);
1428 ide_port_scan(hwif);
1429
1430 return n;
1431};
1432
1433static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan);
1434
1435static struct device_attribute *ide_port_attrs[] = {
1436 &dev_attr_delete_devices,
1437 &dev_attr_scan,
1438 NULL
1439};
1440
1441static int ide_sysfs_register_port(ide_hwif_t *hwif)
1442{
1443 int i, rc;
1444
1445 for (i = 0; ide_port_attrs[i]; i++) {
1446 rc = device_create_file(hwif->portdev, ide_port_attrs[i]);
1447 if (rc)
1448 break;
1449 }
1450
1451 return rc;
1452}
1453
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001454/**
1455 * ide_find_port_slot - find free ide_hwifs[] slot
1456 * @d: IDE port info
1457 *
1458 * Return the new hwif. If we are out of free slots return NULL.
1459 */
1460
1461ide_hwif_t *ide_find_port_slot(const struct ide_port_info *d)
1462{
1463 ide_hwif_t *hwif;
1464 int i;
1465 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
1466
1467 /*
1468 * Claim an unassigned slot.
1469 *
1470 * Give preference to claiming other slots before claiming ide0/ide1,
1471 * just in case there's another interface yet-to-be-scanned
1472 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1473 *
1474 * Unless there is a bootable card that does not use the standard
1475 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1476 */
1477 if (bootable) {
Bartlomiej Zolnierkiewicze277f912008-04-26 17:36:36 +02001478 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
1479
1480 for (; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001481 hwif = &ide_hwifs[i];
1482 if (hwif->chipset == ide_unknown)
1483 return hwif;
1484 }
1485 } else {
1486 for (i = 2; i < MAX_HWIFS; i++) {
1487 hwif = &ide_hwifs[i];
1488 if (hwif->chipset == ide_unknown)
1489 return hwif;
1490 }
1491 for (i = 0; i < 2 && i < MAX_HWIFS; i++) {
1492 hwif = &ide_hwifs[i];
1493 if (hwif->chipset == ide_unknown)
1494 return hwif;
1495 }
1496 }
1497
1498 return NULL;
1499}
1500EXPORT_SYMBOL_GPL(ide_find_port_slot);
1501
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001502int ide_device_add_all(u8 *idx, const struct ide_port_info *d)
1503{
1504 ide_hwif_t *hwif, *mate = NULL;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001505 int i, rc = 0;
1506
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001507 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001508 if (d == NULL || idx[i] == 0xff) {
1509 mate = NULL;
1510 continue;
1511 }
1512
1513 hwif = &ide_hwifs[idx[i]];
1514
1515 if (d->chipset != ide_etrax100 && (i & 1) && mate) {
1516 hwif->mate = mate;
1517 mate->mate = hwif;
1518 }
1519
1520 mate = (i & 1) ? NULL : hwif;
1521
1522 ide_init_port(hwif, i & 1, d);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001523 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001524 ide_port_init_devices(hwif);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001525 }
1526
1527 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001528 if (idx[i] == 0xff)
1529 continue;
1530
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001531 hwif = &ide_hwifs[idx[i]];
1532
Bartlomiej Zolnierkiewicz2c4be252008-04-26 22:25:18 +02001533 if (ide_hwif_request_regions(hwif)) {
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001534 printk(KERN_ERR "%s: ports already in use, "
1535 "skipping probe\n", hwif->name);
1536 continue;
1537 }
1538
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001539 if (ide_probe_port(hwif) == 0)
1540 hwif->present = 1;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001541
1542 if (hwif->chipset != ide_4drives || !hwif->mate ||
1543 !hwif->mate->present)
1544 ide_register_port(hwif);
1545
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001546 if (hwif->present)
1547 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001548 }
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001549
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001550 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001551 if (idx[i] == 0xff)
1552 continue;
1553
1554 hwif = &ide_hwifs[idx[i]];
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001555
1556 if (hwif_init(hwif) == 0) {
1557 printk(KERN_INFO "%s: failed to initialize IDE "
1558 "interface\n", hwif->name);
Bartlomiej Zolnierkiewicz48535652008-02-01 23:09:34 +01001559 hwif->present = 0;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001560 rc = -1;
1561 continue;
1562 }
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001563
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001564 if (hwif->present)
1565 ide_port_setup_devices(hwif);
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +02001566
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001567 ide_acpi_init(hwif);
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001568
1569 if (hwif->present)
1570 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001571 }
1572
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001573 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001574 if (idx[i] == 0xff)
1575 continue;
1576
1577 hwif = &ide_hwifs[idx[i]];
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001578
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001579 if (hwif->chipset == ide_unknown)
1580 hwif->chipset = ide_generic;
1581
1582 if (hwif->present)
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001583 hwif_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001584 }
1585
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001586 for (i = 0; i < MAX_HWIFS; i++) {
Bartlomiej Zolnierkiewicz327617e2008-02-02 19:56:43 +01001587 if (idx[i] == 0xff)
1588 continue;
1589
1590 hwif = &ide_hwifs[idx[i]];
1591
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001592 ide_sysfs_register_port(hwif);
1593 ide_proc_register_port(hwif);
1594
1595 if (hwif->present)
Bartlomiej Zolnierkiewiczd9270a32008-02-02 19:56:43 +01001596 ide_proc_port_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001597 }
1598
1599 return rc;
1600}
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001601EXPORT_SYMBOL_GPL(ide_device_add_all);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001602
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001603int ide_device_add(u8 idx[4], const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001604{
1605 u8 idx_all[MAX_HWIFS];
1606 int i;
1607
1608 for (i = 0; i < MAX_HWIFS; i++)
1609 idx_all[i] = (i < 4) ? idx[i] : 0xff;
1610
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001611 return ide_device_add_all(idx_all, d);
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001612}
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001613EXPORT_SYMBOL_GPL(ide_device_add);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001614
1615void ide_port_scan(ide_hwif_t *hwif)
1616{
1617 ide_port_cable_detect(hwif);
1618 ide_port_init_devices(hwif);
1619
1620 if (ide_probe_port(hwif) < 0)
1621 return;
1622
1623 hwif->present = 1;
1624
1625 ide_port_tune_devices(hwif);
1626 ide_acpi_port_init_devices(hwif);
1627 ide_port_setup_devices(hwif);
1628 hwif_register_devices(hwif);
1629 ide_proc_port_register_devices(hwif);
1630}
1631EXPORT_SYMBOL_GPL(ide_port_scan);
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001632
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001633static void ide_legacy_init_one(u8 *idx, hw_regs_t *hw, u8 port_no,
1634 const struct ide_port_info *d,
1635 unsigned long config)
1636{
1637 ide_hwif_t *hwif;
1638 unsigned long base, ctl;
1639 int irq;
1640
1641 if (port_no == 0) {
1642 base = 0x1f0;
1643 ctl = 0x3f6;
1644 irq = 14;
1645 } else {
1646 base = 0x170;
1647 ctl = 0x376;
1648 irq = 15;
1649 }
1650
1651 ide_std_init_ports(hw, base, ctl);
1652 hw->irq = irq;
1653
1654 hwif = ide_find_port_slot(d);
1655 if (hwif) {
1656 ide_init_port_hw(hwif, hw);
1657 if (config)
1658 hwif->config_data = config;
1659 idx[port_no] = hwif->index;
1660 }
1661}
1662
Bartlomiej Zolnierkiewicz0bfeee72008-04-26 22:25:16 +02001663int ide_legacy_device_add(const struct ide_port_info *d, unsigned long config)
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001664{
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001665 u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
1666 hw_regs_t hw[2];
1667
1668 memset(&hw, 0, sizeof(hw));
1669
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001670 if ((d->host_flags & IDE_HFLAG_QD_2ND_PORT) == 0)
1671 ide_legacy_init_one(idx, &hw[0], 0, d, config);
1672 ide_legacy_init_one(idx, &hw[1], 1, d, config);
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001673
Bartlomiej Zolnierkiewiczd9b819a2008-04-26 22:25:18 +02001674 if (idx[0] == 0xff && idx[1] == 0xff &&
1675 (d->host_flags & IDE_HFLAG_SINGLE))
Bartlomiej Zolnierkiewicz0bfeee72008-04-26 22:25:16 +02001676 return -ENOENT;
1677
Bartlomiej Zolnierkiewicz3b36f662008-04-26 22:25:16 +02001678 ide_device_add(idx, d);
1679
1680 return 0;
1681}
1682EXPORT_SYMBOL_GPL(ide_legacy_device_add);