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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{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020053 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -070058}
59
60static void ide_disk_init_chs(ide_drive_t *drive)
61{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020062 u16 *id = drive->id;
Linus Torvalds1da177e2005-04-16 15:20:36 -070063
64 /* Extract geometry if we did not already have one for the drive */
65 if (!drive->cyl || !drive->head || !drive->sect) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020066 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];
Linus Torvalds1da177e2005-04-16 15:20:36 -070069 }
70
71 /* Handle logical geometry translation by the drive */
Bartlomiej Zolnierkiewiczdd8f46f2008-10-10 22:39:19 +020072 if (ata_id_current_chs_valid(id)) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020073 drive->cyl = id[ATA_ID_CUR_CYLS];
74 drive->head = id[ATA_ID_CUR_HEADS];
75 drive->sect = id[ATA_ID_CUR_SECTORS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070076 }
77
78 /* Use physical geometry if what we have still makes no sense */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +020079 if (drive->head > 16 && id[ATA_ID_HEADS] && id[ATA_ID_HEADS] <= 16) {
80 drive->cyl = id[ATA_ID_CYLS];
81 drive->head = id[ATA_ID_HEADS];
82 drive->sect = id[ATA_ID_SECTORS];
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 }
84}
85
86static void ide_disk_init_mult_count(ide_drive_t *drive)
87{
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020088 u16 *id = drive->id;
89 u8 max_multsect = id[ATA_ID_MAX_MULTSECT] & 0xff;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020091 if (max_multsect) {
Bartlomiej Zolnierkiewicz48fb2682008-10-10 22:39:19 +020092 if ((max_multsect / 2) > 1)
93 id[ATA_ID_MULTSECT] = max_multsect | 0x100;
94 else
95 id[ATA_ID_MULTSECT] &= ~0x1ff;
96
97 drive->mult_req = id[ATA_ID_MULTSECT] & 0xff;
Bartlomiej Zolnierkiewicz7c51c172008-10-10 22:39:26 +020098
99 if (drive->mult_req)
Bartlomiej Zolnierkiewiczdf1f8372008-10-10 22:39:18 +0200100 drive->special.b.set_multmode = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101 }
102}
103
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100104static void ide_classify_ata_dev(ide_drive_t *drive)
105{
106 u16 *id = drive->id;
107 char *m = (char *)&id[ATA_ID_PROD];
108 int is_cfa = ata_id_is_cfa(id);
109
110 /* CF devices are *not* removable in Linux definition of the term */
111 if (is_cfa == 0 && (id[ATA_ID_CONFIG] & (1 << 7)))
112 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
113
114 drive->media = ide_disk;
115
116 if (!ata_id_has_unload(drive->id))
117 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
118
119 printk(KERN_INFO "%s: %s, %s DISK drive\n", drive->name, m,
120 is_cfa ? "CFA" : "ATA");
121}
122
123static void ide_classify_atapi_dev(ide_drive_t *drive)
124{
125 u16 *id = drive->id;
126 char *m = (char *)&id[ATA_ID_PROD];
127 u8 type = (id[ATA_ID_CONFIG] >> 8) & 0x1f;
128
129 printk(KERN_INFO "%s: %s, ATAPI ", drive->name, m);
130 switch (type) {
131 case ide_floppy:
132 if (!strstr(m, "CD-ROM")) {
133 if (!strstr(m, "oppy") &&
134 !strstr(m, "poyp") &&
135 !strstr(m, "ZIP"))
136 printk(KERN_CONT "cdrom or floppy?, assuming ");
137 if (drive->media != ide_cdrom) {
138 printk(KERN_CONT "FLOPPY");
139 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
140 break;
141 }
142 }
143 /* Early cdrom models used zero */
144 type = ide_cdrom;
145 case ide_cdrom:
146 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
147#ifdef CONFIG_PPC
148 /* kludge for Apple PowerBook internal zip */
149 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
150 printk(KERN_CONT "FLOPPY");
151 type = ide_floppy;
152 break;
153 }
154#endif
155 printk(KERN_CONT "CD/DVD-ROM");
156 break;
157 case ide_tape:
158 printk(KERN_CONT "TAPE");
159 break;
160 case ide_optical:
161 printk(KERN_CONT "OPTICAL");
162 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
163 break;
164 default:
165 printk(KERN_CONT "UNKNOWN (type %d)", type);
166 break;
167 }
168
169 printk(KERN_CONT " drive\n");
170 drive->media = type;
171 /* an ATAPI device ignores DRDY */
172 drive->ready_stat = 0;
173 if (ata_id_cdb_intr(id))
174 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
175 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
176 /* we don't do head unloading on ATAPI devices */
177 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
178}
179
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 * do_identify - identify a drive
182 * @drive: drive to identify
183 * @cmd: command used
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100184 * @id: buffer for IDENTIFY data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 *
186 * Called when we have issued a drive identify command to
187 * read and parse the results. This function is run with
188 * interrupts disabled.
189 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100190
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100191static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100193 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200194 char *m = (char *)&id[ATA_ID_PROD];
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100195 unsigned long flags;
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100196 int bswap = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100198 /* local CPU only; some systems need this */
199 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 /* read 512 bytes of id info */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200201 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100202 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200204 drive->dev_flags |= IDE_DFLAG_ID_READ;
Bartlomiej Zolnierkiewicz7b9f25b2008-02-01 23:09:28 +0100205#ifdef DEBUG
206 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
207 ide_dump_identify((u8 *)id);
208#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 ide_fix_driveid(id);
210
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 /*
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200212 * ATA_CMD_ID_ATA returns little-endian info,
213 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200215 if (cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200216 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
217 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
218 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 /* Vertos drives may still be weird */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200220 bswap ^= 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700221 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200222
223 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
224 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700226
Tejun Heo699b0522007-11-05 21:42:25 +0100227 /* we depend on this a lot! */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200228 m[ATA_ID_PROD_LEN - 1] = '\0';
Tejun Heo699b0522007-11-05 21:42:25 +0100229
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200230 if (strstr(m, "E X A B Y T E N E S T"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 goto err_misc;
232
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200233 drive->dev_flags |= IDE_DFLAG_PRESENT;
234 drive->dev_flags &= ~IDE_DFLAG_DEAD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 return;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237err_misc:
238 kfree(id);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200239 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240}
241
242/**
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100243 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244 * @drive: drive to identify
245 * @cmd: command to use
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100246 * @id: buffer for IDENTIFY data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 *
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100248 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 *
250 * Returns: 0 device was identified
251 * 1 device timed-out (no response to identify request)
252 * 2 device aborted the command (refused to identify itself)
253 */
254
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100255int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100257 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200258 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200259 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100260 int use_altstatus = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 unsigned long timeout;
262 u8 s = 0, a = 0;
263
Bartlomiej Zolnierkiewicza1828072009-03-24 23:22:53 +0100264 /*
265 * Disable device IRQ. Otherwise we'll get spurious interrupts
266 * during the identify phase that the IRQ handler isn't expecting.
267 */
268 if (io_ports->ctl_addr)
269 tp_ops->set_irq(hwif, 0);
270
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 /* take a deep breath */
272 msleep(50);
273
Bartlomiej Zolnierkiewicz66364872008-12-02 20:40:03 +0100274 if (io_ports->ctl_addr &&
275 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200276 a = tp_ops->read_altstatus(hwif);
277 s = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200278 if ((a ^ s) & ~ATA_IDX)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700279 /* ancient Seagate drives, broken interfaces */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100280 printk(KERN_INFO "%s: probing with STATUS(0x%02x) "
281 "instead of ALTSTATUS(0x%02x)\n",
282 drive->name, s, a);
283 else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284 /* use non-intrusive polling */
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100285 use_altstatus = 1;
286 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
288 /* set features register for atapi
289 * identify command to be sure of reply
290 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200291 if (cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200292 ide_task_t task;
293
294 memset(&task, 0, sizeof(task));
295 /* disable DMA & overlap */
296 task.tf_flags = IDE_TFLAG_OUT_FEATURE;
297
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200298 tp_ops->tf_load(drive, &task);
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
301 /* ask drive for ID */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200302 tp_ops->exec_command(hwif, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200304 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200305
306 if (ide_busy_sleep(hwif, timeout, use_altstatus))
307 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200309 /* wait for IRQ and ATA_DRQ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 msleep(50);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200311 s = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100312
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200313 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 /* drive returned ID */
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100315 do_identify(drive, cmd, id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 /* drive responded with ID */
317 rc = 0;
318 /* clear drive IRQ */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200319 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 } else {
321 /* drive refused ID */
322 rc = 2;
323 }
324 return rc;
325}
326
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200327int ide_busy_sleep(ide_hwif_t *hwif, unsigned long timeout, int altstatus)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100328{
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100329 u8 stat;
330
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200331 timeout += jiffies;
332
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100333 do {
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200334 msleep(50); /* give drive a breather */
335 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
336 : hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200337 if ((stat & ATA_BUSY) == 0)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100338 return 0;
339 } while (time_before(jiffies, timeout));
340
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200341 return 1; /* drive timed-out */
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100342}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200344static u8 ide_read_device(ide_drive_t *drive)
345{
346 ide_task_t task;
347
348 memset(&task, 0, sizeof(task));
349 task.tf_flags = IDE_TFLAG_IN_DEVICE;
350
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200351 drive->hwif->tp_ops->tf_read(drive, &task);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200352
353 return task.tf.device;
354}
355
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356/**
357 * do_probe - probe an IDE device
358 * @drive: drive to probe
359 * @cmd: command to use
360 *
361 * do_probe() has the difficult job of finding a drive if it exists,
362 * without getting hung up if it doesn't exist, without trampling on
363 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
364 *
365 * If a drive is "known" to exist (from CMOS or kernel parameters),
366 * but does not respond right away, the probe will "hang in there"
367 * for the maximum wait time (about 30 seconds), otherwise it will
368 * exit much more quickly.
369 *
370 * Returns: 0 device was identified
371 * 1 device timed-out (no response to identify request)
372 * 2 device aborted the command (refused to identify itself)
373 * 3 bad status from device (possible for ATAPI drives)
374 * 4 probe was not attempted because failure was obvious
375 */
376
377static int do_probe (ide_drive_t *drive, u8 cmd)
378{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100379 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200380 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100381 u16 *id = drive->id;
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100382 int rc;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200383 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200385 /* avoid waiting for inappropriate probes */
386 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
387 return 4;
388
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389#ifdef DEBUG
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200390 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200391 drive->name, present, drive->media,
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200392 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#endif
394
395 /* needed for some systems
396 * (e.g. crw9624 as drive0 with disk as slave)
397 */
398 msleep(50);
399 SELECT_DRIVE(drive);
400 msleep(50);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200401
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200402 if (ide_read_device(drive) != drive->select && present == 0) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200403 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 /* exit with drive0 selected */
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100405 SELECT_DRIVE(hwif->devices[0]);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200406 /* allow ATA_BUSY to assert & clear */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 msleep(50);
408 }
409 /* no i/f present: mmm.. this should be a 4 -ml */
410 return 3;
411 }
412
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200413 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100414
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200415 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200416 present || cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100417 rc = ide_dev_read_id(drive, cmd, id);
418 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 /* failed: try again */
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100420 rc = ide_dev_read_id(drive, cmd, id);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100421
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200422 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100423
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200424 if (stat == (ATA_BUSY | ATA_DRDY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425 return 4;
426
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200427 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100428 printk(KERN_ERR "%s: no response (status = 0x%02x), "
429 "resetting drive\n", drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430 msleep(50);
Bartlomiej Zolnierkiewicze81a3bd2008-07-15 21:21:48 +0200431 SELECT_DRIVE(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432 msleep(50);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200433 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200434 (void)ide_busy_sleep(hwif, WAIT_WORSTCASE, 0);
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100435 rc = ide_dev_read_id(drive, cmd, id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100437
438 /* ensure drive IRQ is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200439 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441 if (rc == 1)
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100442 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
443 drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 } else {
445 /* not present or maybe ATAPI */
446 rc = 3;
447 }
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200448 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449 /* exit with drive0 selected */
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100450 SELECT_DRIVE(hwif->devices[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700451 msleep(50);
452 /* ensure drive irq is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200453 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 }
455 return rc;
456}
457
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458/**
459 * probe_for_drives - upper level drive probe
460 * @drive: drive to probe for
461 *
462 * probe_for_drive() tests for existence of a given drive using do_probe()
463 * and presents things to the user as needed.
464 *
465 * Returns: 0 no device was found
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200466 * 1 device was found
467 * (note: IDE_DFLAG_PRESENT might still be not set)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700468 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100469
470static u8 probe_for_drive(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200472 char *m;
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100473 int rc;
474 u8 cmd;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200475
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 /*
477 * In order to keep things simple we have an id
478 * block for all drives at all times. If the device
479 * is pre ATA or refuses ATA/ATAPI identify we
480 * will add faked data to this.
481 *
482 * Also note that 0 everywhere means "can't do X"
483 */
484
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200485 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
486
Bartlomiej Zolnierkiewicz151a6702008-10-10 22:39:28 +0200487 drive->id = kzalloc(SECTOR_SIZE, GFP_KERNEL);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200488 if (drive->id == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700489 printk(KERN_ERR "ide: out of memory for id data.\n");
490 return 0;
491 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200492
493 m = (char *)&drive->id[ATA_ID_PROD];
494 strcpy(m, "UNKNOWN");
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 /* skip probing? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200497 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498 /* if !(success||timed-out) */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100499 cmd = ATA_CMD_ID_ATA;
500 rc = do_probe(drive, cmd);
501 if (rc >= 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700502 /* look for ATAPI device */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100503 cmd = ATA_CMD_ID_ATAPI;
504 rc = do_probe(drive, cmd);
505 }
Bartlomiej Zolnierkiewiczc36a7e92008-10-10 22:39:23 +0200506
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200507 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 /* drive not found */
509 return 0;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200510
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 /* identification failed? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200512 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 if (drive->media == ide_disk) {
514 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
515 drive->name, drive->cyl,
516 drive->head, drive->sect);
517 } else if (drive->media == ide_cdrom) {
518 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
519 } else {
520 /* nuke it */
521 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200522 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 }
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100524 } else {
525 if (cmd == ATA_CMD_ID_ATAPI)
526 ide_classify_atapi_dev(drive);
527 else
528 ide_classify_ata_dev(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700529 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530 }
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200531
532 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 return 0;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200534
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535 /* The drive wasn't being helpful. Add generic info only */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200536 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700537 generic_id(drive);
538 return 1;
539 }
540
541 if (drive->media == ide_disk) {
542 ide_disk_init_chs(drive);
543 ide_disk_init_mult_count(drive);
544 }
545
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200546 return !!(drive->dev_flags & IDE_DFLAG_PRESENT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547}
548
Pavel Machekfc410692008-07-23 19:56:02 +0200549static void hwif_release_dev(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550{
551 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
552
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800553 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700554}
555
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200556static int ide_register_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
Randy Dunlap349ae232006-10-03 01:14:23 -0700558 int ret;
559
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 /* register with global device tree */
Kay Sieversdc09c782008-12-29 20:27:36 +0100561 dev_set_name(&hwif->gendev, hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 hwif->gendev.driver_data = hwif;
Andreas Schwabbb54aff2009-01-19 13:46:56 +0100563 if (hwif->gendev.parent == NULL)
564 hwif->gendev.parent = hwif->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565 hwif->gendev.release = hwif_release_dev;
Bartlomiej Zolnierkiewicz96d40942009-01-02 16:12:47 +0100566
Randy Dunlap349ae232006-10-03 01:14:23 -0700567 ret = device_register(&hwif->gendev);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200568 if (ret < 0) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700569 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200570 __func__, ret);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200571 goto out;
572 }
573
Greg Kroah-Hartman3ee074b2008-07-21 20:03:34 -0700574 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
575 MKDEV(0, 0), hwif, hwif->name);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200576 if (IS_ERR(hwif->portdev)) {
577 ret = PTR_ERR(hwif->portdev);
578 device_unregister(&hwif->gendev);
579 }
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200580out:
581 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582}
583
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100584/**
585 * ide_port_wait_ready - wait for port to become ready
586 * @hwif: IDE port
587 *
588 * This is needed on some PPCs and a bunch of BIOS-less embedded
589 * platforms. Typical cases are:
590 *
591 * - The firmware hard reset the disk before booting the kernel,
592 * the drive is still doing it's poweron-reset sequence, that
593 * can take up to 30 seconds.
594 *
595 * - The firmware does nothing (or no firmware), the device is
596 * still in POST state (same as above actually).
597 *
598 * - Some CD/DVD/Writer combo drives tend to drive the bus during
599 * their reset sequence even when they are non-selected slave
600 * devices, thus preventing discovery of the main HD.
601 *
602 * Doing this wait-for-non-busy should not harm any existing
603 * configuration and fix some issues like the above.
604 *
605 * BenH.
606 *
607 * Returns 0 on success, error code (< 0) otherwise.
608 */
609
610static int ide_port_wait_ready(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100612 ide_drive_t *drive;
613 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
616
617 /* Let HW settle down a bit from whatever init state we
618 * come from */
619 mdelay(2);
620
621 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
622 * I know of at least one disk who takes 31 seconds, I use 35
623 * here to be safe
624 */
625 rc = ide_wait_not_busy(hwif, 35000);
626 if (rc)
627 return rc;
628
629 /* Now make sure both master & slave are ready */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100630 ide_port_for_each_dev(i, drive, hwif) {
Jonas Stare82661052007-11-27 21:35:53 +0100631 /* Ignore disks that we will not probe for later. */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200632 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
633 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
Jonas Stare82661052007-11-27 21:35:53 +0100634 SELECT_DRIVE(drive);
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200635 hwif->tp_ops->set_irq(hwif, 1);
Jonas Stare82661052007-11-27 21:35:53 +0100636 mdelay(2);
637 rc = ide_wait_not_busy(hwif, 35000);
638 if (rc)
639 goto out;
640 } else
641 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
642 drive->name);
643 }
644out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 /* Exit function with master reselected (let's be sane) */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100646 if (i)
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100647 SELECT_DRIVE(hwif->devices[0]);
Jonas Stare82661052007-11-27 21:35:53 +0100648
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 return rc;
650}
651
652/**
653 * ide_undecoded_slave - look for bad CF adapters
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200654 * @dev1: slave device
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 *
656 * Analyse the drives on the interface and attempt to decide if we
657 * have the same drive viewed twice. This occurs with crap CF adapters
658 * and PCMCIA sometimes.
659 */
660
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200661void ide_undecoded_slave(ide_drive_t *dev1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662{
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100663 ide_drive_t *dev0 = dev1->hwif->devices[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200665 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666 return;
667
668 /* If the models don't match they are not the same product */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200669 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
670 (char *)&dev1->id[ATA_ID_PROD]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700671 return;
672
673 /* Serial numbers do not match */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200674 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
675 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700676 return;
677
678 /* No serial number, thankfully very rare for CF */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200679 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680 return;
681
682 /* Appears to be an IDE flash adapter with decode bugs */
683 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
684
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200685 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686}
687
688EXPORT_SYMBOL_GPL(ide_undecoded_slave);
689
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100690static int ide_probe_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100692 ide_drive_t *drive;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 unsigned int irqd;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100694 int i, rc = -ENODEV;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100695
696 BUG_ON(hwif->present);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100698 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
699 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100700 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702 /*
703 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
704 * we'll install our IRQ driver much later...
705 */
706 irqd = hwif->irq;
707 if (irqd)
708 disable_irq(hwif->irq);
709
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100710 if (ide_port_wait_ready(hwif) == -EBUSY)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700711 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
712
713 /*
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100714 * Second drive should only exist if first drive was found,
715 * but a lot of cdrom drives are configured as single slaves.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716 */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100717 ide_port_for_each_dev(i, drive, hwif) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718 (void) probe_for_drive(drive);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200719 if (drive->dev_flags & IDE_DFLAG_PRESENT)
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100720 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 }
Bartlomiej Zolnierkiewicze460a592008-04-27 15:38:24 +0200722
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 /*
724 * Use cached IRQ number. It might be (and is...) changed by probe
725 * code above
726 */
727 if (irqd)
728 enable_irq(irqd);
729
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100730 return rc;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100731}
732
733static void ide_port_tune_devices(ide_hwif_t *hwif)
734{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200735 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100736 ide_drive_t *drive;
737 int i;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100738
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100739 ide_port_for_each_present_dev(i, drive, hwif) {
740 if (port_ops && port_ops->quirkproc)
741 port_ops->quirkproc(drive);
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100742 }
Bartlomiej Zolnierkiewicz0380dad2007-06-08 15:14:29 +0200743
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100744 ide_port_for_each_present_dev(i, drive, hwif) {
745 ide_set_max_pio(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100747 drive->dev_flags |= IDE_DFLAG_NICE1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100749 if (hwif->dma_ops)
750 ide_set_dma(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700751 }
752}
753
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 * init request queue
756 */
757static int ide_init_queue(ide_drive_t *drive)
758{
Jens Axboe165125e2007-07-24 09:28:11 +0200759 struct request_queue *q;
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100760 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761 int max_sectors = 256;
762 int max_sg_entries = PRD_ENTRIES;
763
764 /*
765 * Our default set up assumes the normal IDE case,
766 * that is 64K segmenting, standard PRD setup
767 * and LBA28. Some drivers then impose their own
768 * limits and LBA48 we could raise it but as yet
769 * do not.
770 */
Christoph Lameter19460892005-06-23 00:08:19 -0700771
Bartlomiej Zolnierkiewicz201bffa2009-01-02 16:12:50 +0100772 q = blk_init_queue_node(do_ide_request, NULL, hwif_to_node(hwif));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773 if (!q)
774 return 1;
775
776 q->queuedata = drive;
777 blk_queue_segment_boundary(q, 0xffff);
778
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 if (hwif->rqsize < max_sectors)
780 max_sectors = hwif->rqsize;
781 blk_queue_max_sectors(q, max_sectors);
782
783#ifdef CONFIG_PCI
784 /* When we have an IOMMU, we may have a problem where pci_map_sg()
785 * creates segments that don't completely match our boundary
786 * requirements and thus need to be broken up again. Because it
787 * doesn't align properly either, we may actually have to break up
788 * to more segments than what was we got in the first place, a max
789 * worst case is twice as many.
790 * This will be fixed once we teach pci_map_sg() about our boundary
791 * requirements, hopefully soon. *FIXME*
792 */
793 if (!PCI_DMA_BUS_IS_PHYS)
794 max_sg_entries >>= 1;
795#endif /* CONFIG_PCI */
796
797 blk_queue_max_hw_segments(q, max_sg_entries);
798 blk_queue_max_phys_segments(q, max_sg_entries);
799
800 /* assign drive queue */
801 drive->queue = q;
802
803 /* needs drive->queue to be set */
804 ide_toggle_bounce(drive, 1);
805
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 return 0;
807}
808
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +0100809static DEFINE_MUTEX(ide_cfg_mtx);
810
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811/*
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100812 * For any present drive:
813 * - allocate the block device queue
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100814 */
Elias Oltmannse415e492008-10-13 21:39:45 +0200815static int ide_port_setup_devices(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100816{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100817 ide_drive_t *drive;
Elias Oltmannse415e492008-10-13 21:39:45 +0200818 int i, j = 0;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100819
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200820 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100821 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100822 if (ide_init_queue(drive)) {
823 printk(KERN_ERR "ide: failed to init %s\n",
824 drive->name);
Elias Oltmannse415e492008-10-13 21:39:45 +0200825 kfree(drive->id);
826 drive->id = NULL;
827 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100828 continue;
829 }
830
Elias Oltmannse415e492008-10-13 21:39:45 +0200831 j++;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100832 }
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200833 mutex_unlock(&ide_cfg_mtx);
Elias Oltmannse415e492008-10-13 21:39:45 +0200834
835 return j;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100836}
837
838/*
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100839 * This routine sets up the IRQ for an IDE interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700840 */
841static int init_irq (ide_hwif_t *hwif)
842{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200843 struct ide_io_ports *io_ports = &hwif->io_ports;
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100844 irq_handler_t irq_handler;
Bartlomiej Zolnierkiewiczae86afa2009-01-06 17:20:48 +0100845 int sa = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100847 irq_handler = hwif->host->irq_handler;
848 if (irq_handler == NULL)
849 irq_handler = ide_intr;
850
Adrian Bunk7b892802008-02-06 01:36:29 -0800851#if defined(__mc68000__)
Bartlomiej Zolnierkiewiczae86afa2009-01-06 17:20:48 +0100852 sa = IRQF_SHARED;
Bartlomiej Zolnierkiewicze1771e22008-02-11 00:32:15 +0100853#endif /* __mc68000__ */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
Bartlomiej Zolnierkiewiczae86afa2009-01-06 17:20:48 +0100855 if (hwif->chipset == ide_pci)
856 sa = IRQF_SHARED;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857
Bartlomiej Zolnierkiewiczae86afa2009-01-06 17:20:48 +0100858 if (io_ports->ctl_addr)
859 hwif->tp_ops->set_irq(hwif, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100861 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100862 goto out_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863
Bartlomiej Zolnierkiewicz8a0e7e12008-02-02 19:56:41 +0100864 if (!hwif->rqsize) {
865 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
866 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
867 hwif->rqsize = 256;
868 else
869 hwif->rqsize = 65536;
870 }
871
Adrian Bunk7b892802008-02-06 01:36:29 -0800872#if !defined(__mc68000__)
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200873 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200874 io_ports->data_addr, io_ports->status_addr,
875 io_ports->ctl_addr, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700876#else
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200877 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200878 io_ports->data_addr, hwif->irq);
Adrian Bunk7b892802008-02-06 01:36:29 -0800879#endif /* __mc68000__ */
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100880 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
881 printk(KERN_CONT " (serialized)");
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200882 printk(KERN_CONT "\n");
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100883
Linus Torvalds1da177e2005-04-16 15:20:36 -0700884 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885out_up:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886 return 1;
887}
888
889static int ata_lock(dev_t dev, void *data)
890{
891 /* FIXME: we want to pin hwif down */
892 return 0;
893}
894
895static struct kobject *ata_probe(dev_t dev, int *part, void *data)
896{
897 ide_hwif_t *hwif = data;
898 int unit = *part >> PARTN_BITS;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100899 ide_drive_t *drive = hwif->devices[unit];
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200900
901 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 return NULL;
903
904 if (drive->media == ide_disk)
905 request_module("ide-disk");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 if (drive->media == ide_cdrom || drive->media == ide_optical)
907 request_module("ide-cd");
908 if (drive->media == ide_tape)
909 request_module("ide-tape");
910 if (drive->media == ide_floppy)
911 request_module("ide-floppy");
912
913 return NULL;
914}
915
916static struct kobject *exact_match(dev_t dev, int *part, void *data)
917{
918 struct gendisk *p = data;
919 *part &= (1 << PARTN_BITS) - 1;
Tejun Heoed9e1982008-08-25 19:56:05 +0900920 return &disk_to_dev(p)->kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700921}
922
923static int exact_lock(dev_t dev, void *data)
924{
925 struct gendisk *p = data;
926
927 if (!get_disk(p))
928 return -1;
929 return 0;
930}
931
932void ide_register_region(struct gendisk *disk)
933{
934 blk_register_region(MKDEV(disk->major, disk->first_minor),
935 disk->minors, NULL, exact_match, exact_lock, disk);
936}
937
938EXPORT_SYMBOL_GPL(ide_register_region);
939
940void ide_unregister_region(struct gendisk *disk)
941{
942 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
943 disk->minors);
944}
945
946EXPORT_SYMBOL_GPL(ide_unregister_region);
947
948void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
949{
950 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200951 unsigned int unit = drive->dn & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952
953 disk->major = hwif->major;
954 disk->first_minor = unit << PARTN_BITS;
955 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
956 disk->queue = drive->queue;
957}
958
959EXPORT_SYMBOL_GPL(ide_init_disk);
960
961static void drive_release_dev (struct device *dev)
962{
963 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100964 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700965
Bartlomiej Zolnierkiewicz5b0c4b32008-04-18 00:46:22 +0200966 ide_proc_unregister_device(drive);
967
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100968 spin_lock_irq(&hwif->lock);
Jesper Juhl6044ec82005-11-07 01:01:32 -0800969 kfree(drive->id);
970 drive->id = NULL;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200971 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200972 /* Messed up locking ... */
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100973 spin_unlock_irq(&hwif->lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200974 blk_cleanup_queue(drive->queue);
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100975 spin_lock_irq(&hwif->lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200976 drive->queue = NULL;
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100977 spin_unlock_irq(&hwif->lock);
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200978
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800979 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700980}
981
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982static int hwif_init(ide_hwif_t *hwif)
983{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700984 if (!hwif->irq) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +0100985 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
986 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700988
Linus Torvalds1da177e2005-04-16 15:20:36 -0700989 if (register_blkdev(hwif->major, hwif->name))
990 return 0;
991
992 if (!hwif->sg_max_nents)
993 hwif->sg_max_nents = PRD_ENTRIES;
994
Jens Axboe45711f12007-10-22 21:19:53 +0200995 hwif->sg_table = kmalloc(sizeof(struct scatterlist)*hwif->sg_max_nents,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 GFP_KERNEL);
997 if (!hwif->sg_table) {
998 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
999 goto out;
1000 }
Jens Axboe45711f12007-10-22 21:19:53 +02001001
1002 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001003
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 if (init_irq(hwif)) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +01001005 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
1006 hwif->name, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 goto out;
1008 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001009
Bartlomiej Zolnierkiewicz3a4e7c92008-02-02 19:56:40 +01001010 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1011 THIS_MODULE, ata_probe, ata_lock, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001012 return 1;
1013
1014out:
1015 unregister_blkdev(hwif->major, hwif->name);
1016 return 0;
1017}
1018
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001019static void hwif_register_devices(ide_hwif_t *hwif)
1020{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001021 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001022 unsigned int i;
1023
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001024 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001025 struct device *dev = &drive->gendev;
1026 int ret;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001027
Kay Sieversdc09c782008-12-29 20:27:36 +01001028 dev_set_name(dev, "%u.%u", hwif->index, i);
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001029 dev->parent = &hwif->gendev;
1030 dev->bus = &ide_bus_type;
1031 dev->driver_data = drive;
1032 dev->release = drive_release_dev;
1033
1034 ret = device_register(dev);
1035 if (ret < 0)
1036 printk(KERN_WARNING "IDE: %s: device_register error: "
1037 "%d\n", __func__, ret);
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001038 }
1039}
1040
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001041static void ide_port_init_devices(ide_hwif_t *hwif)
1042{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001043 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001044 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001045 int i;
1046
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001047 ide_port_for_each_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +02001048 drive->dn = i + hwif->channel * 2;
1049
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001050 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1051 drive->io_32bit = 1;
Bartlomiej Zolnierkiewicz7610c4f2009-03-24 23:22:38 +01001052 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1053 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001054 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001055 drive->dev_flags |= IDE_DFLAG_UNMASK;
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +01001056 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001057 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
Bartlomiej Zolnierkiewicz1f2cf8b2008-02-02 19:56:40 +01001058
Bartlomiej Zolnierkiewicze6d95bd2008-07-16 20:33:42 +02001059 if (port_ops && port_ops->init_dev)
1060 port_ops->init_dev(drive);
1061 }
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001062}
1063
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001064static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1065 const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001066{
Adrian Bunkb7691642008-06-10 20:56:36 +02001067 hwif->channel = port;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001068
1069 if (d->chipset)
1070 hwif->chipset = d->chipset;
1071
1072 if (d->init_iops)
1073 d->init_iops(hwif);
1074
Bartlomiej Zolnierkiewicz23f8e4b2008-05-01 14:08:51 +02001075 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1076 hwif->host_flags |= d->host_flags;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001077 hwif->pio_mask = d->pio_mask;
1078
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001079 if (d->tp_ops)
1080 hwif->tp_ops = d->tp_ops;
1081
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001082 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
1083 if (hwif->chipset != ide_dtc2278 || hwif->channel == 0)
1084 hwif->port_ops = d->port_ops;
1085
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001086 hwif->swdma_mask = d->swdma_mask;
1087 hwif->mwdma_mask = d->mwdma_mask;
1088 hwif->ultra_mask = d->udma_mask;
1089
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001090 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1091 int rc;
1092
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001093 hwif->dma_ops = d->dma_ops;
1094
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001095 if (d->init_dma)
1096 rc = d->init_dma(hwif, d);
1097 else
1098 rc = ide_hwif_setup_dma(hwif, d);
1099
1100 if (rc < 0) {
1101 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001102
1103 hwif->dma_ops = NULL;
Bartlomiej Zolnierkiewiczebb00fb2008-07-23 19:55:51 +02001104 hwif->dma_base = 0;
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001105 hwif->swdma_mask = 0;
1106 hwif->mwdma_mask = 0;
1107 hwif->ultra_mask = 0;
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001108 }
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001109 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001110
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001111 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
Bartlomiej Zolnierkiewicz702c0262008-12-29 20:27:36 +01001112 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1113 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001114
Bartlomiej Zolnierkiewicz6b492492008-12-29 20:27:34 +01001115 if (d->max_sectors)
1116 hwif->rqsize = d->max_sectors;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001117
1118 /* call chipset specific routine for each enabled port */
1119 if (d->init_hwif)
1120 d->init_hwif(hwif);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001121}
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001122
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001123static void ide_port_cable_detect(ide_hwif_t *hwif)
1124{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001125 const struct ide_port_ops *port_ops = hwif->port_ops;
1126
1127 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001128 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001129 hwif->cbl = port_ops->cable_detect(hwif);
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001130 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001131}
1132
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001133static const u8 ide_hwif_to_major[] =
1134 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1135 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1136
1137static void ide_port_init_devices_data(ide_hwif_t *hwif)
1138{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001139 ide_drive_t *drive;
1140 int i;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001141
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001142 ide_port_for_each_dev(i, drive, hwif) {
1143 u8 j = (hwif->index * MAX_DRIVES) + i;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001144
1145 memset(drive, 0, sizeof(*drive));
1146
1147 drive->media = ide_disk;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001148 drive->select = (i << 4) | ATA_DEVICE_OBS;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001149 drive->hwif = hwif;
1150 drive->ready_stat = ATA_DRDY;
1151 drive->bad_wstat = BAD_W_STAT;
1152 drive->special.b.recalibrate = 1;
1153 drive->special.b.set_geometry = 1;
1154 drive->name[0] = 'h';
1155 drive->name[1] = 'd';
1156 drive->name[2] = 'a' + j;
1157 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1158
1159 INIT_LIST_HEAD(&drive->list);
1160 init_completion(&drive->gendev_rel_comp);
1161 }
1162}
1163
1164static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1165{
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001166 /* fill in any non-zero initial values */
1167 hwif->index = index;
1168 hwif->major = ide_hwif_to_major[index];
1169
1170 hwif->name[0] = 'i';
1171 hwif->name[1] = 'd';
1172 hwif->name[2] = 'e';
1173 hwif->name[3] = '0' + index;
1174
Bartlomiej Zolnierkiewicz73629512009-03-24 23:22:39 +01001175 spin_lock_init(&hwif->lock);
1176
1177 init_timer(&hwif->timer);
1178 hwif->timer.function = &ide_timer_expiry;
1179 hwif->timer.data = (unsigned long)hwif;
1180
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001181 init_completion(&hwif->gendev_rel_comp);
1182
1183 hwif->tp_ops = &default_tp_ops;
1184
1185 ide_port_init_devices_data(hwif);
1186}
1187
1188static void ide_init_port_hw(ide_hwif_t *hwif, hw_regs_t *hw)
1189{
1190 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1191 hwif->irq = hw->irq;
1192 hwif->chipset = hw->chipset;
1193 hwif->dev = hw->dev;
1194 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
1195 hwif->ack_intr = hw->ack_intr;
1196 hwif->config_data = hw->config;
1197}
1198
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001199static unsigned int ide_indexes;
1200
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001201/**
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001202 * ide_find_port_slot - find free port slot
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001203 * @d: IDE port info
1204 *
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001205 * Return the new port slot index or -ENOENT if we are out of free slots.
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001206 */
1207
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001208static int ide_find_port_slot(const struct ide_port_info *d)
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001209{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001210 int idx = -ENOENT;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001211 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001212 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001213
1214 /*
1215 * Claim an unassigned slot.
1216 *
1217 * Give preference to claiming other slots before claiming ide0/ide1,
1218 * just in case there's another interface yet-to-be-scanned
1219 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1220 *
1221 * Unless there is a bootable card that does not use the standard
1222 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1223 */
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001224 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001225 if (bootable) {
1226 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1227 idx = ffz(ide_indexes | i);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001228 } else {
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001229 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1230 idx = ffz(ide_indexes | 3);
1231 else if ((ide_indexes & 3) != 3)
1232 idx = ffz(ide_indexes);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001233 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001234 if (idx >= 0)
1235 ide_indexes |= (1 << idx);
1236 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001237
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001238 return idx;
1239}
Bartlomiej Zolnierkiewiczeb3aff52008-07-16 20:33:42 +02001240
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001241static void ide_free_port_slot(int idx)
1242{
1243 mutex_lock(&ide_cfg_mtx);
1244 ide_indexes &= ~(1 << idx);
1245 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001246}
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001247
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001248static void ide_port_free_devices(ide_hwif_t *hwif)
1249{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001250 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001251 int i;
1252
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001253 ide_port_for_each_dev(i, drive, hwif)
1254 kfree(drive);
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001255}
1256
1257static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1258{
1259 int i;
1260
1261 for (i = 0; i < MAX_DRIVES; i++) {
1262 ide_drive_t *drive;
1263
1264 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1265 if (drive == NULL)
1266 goto out_nomem;
1267
1268 hwif->devices[i] = drive;
1269 }
1270 return 0;
1271
1272out_nomem:
1273 ide_port_free_devices(hwif);
1274 return -ENOMEM;
1275}
1276
Bartlomiej Zolnierkiewicza36223b2008-10-13 21:39:43 +02001277struct ide_host *ide_host_alloc(const struct ide_port_info *d, hw_regs_t **hws)
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001278{
1279 struct ide_host *host;
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001280 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1281 int node = dev ? dev_to_node(dev) : -1;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001282 int i;
1283
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001284 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001285 if (host == NULL)
1286 return NULL;
1287
Bartlomiej Zolnierkiewicza36223b2008-10-13 21:39:43 +02001288 for (i = 0; i < MAX_HOST_PORTS; i++) {
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001289 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001290 int idx;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001291
1292 if (hws[i] == NULL)
1293 continue;
1294
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001295 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz18de1012008-07-23 19:55:58 +02001296 if (hwif == NULL)
1297 continue;
1298
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001299 if (ide_port_alloc_devices(hwif, node) < 0) {
1300 kfree(hwif);
1301 continue;
1302 }
1303
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001304 idx = ide_find_port_slot(d);
1305 if (idx < 0) {
1306 printk(KERN_ERR "%s: no free slot for interface\n",
1307 d ? d->name : "ide");
Bartlomiej Zolnierkiewicz18de1012008-07-23 19:55:58 +02001308 kfree(hwif);
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001309 continue;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001310 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001311
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001312 ide_init_port_data(hwif, idx);
1313
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +02001314 hwif->host = host;
1315
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001316 host->ports[i] = hwif;
1317 host->n_ports++;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001318 }
1319
1320 if (host->n_ports == 0) {
1321 kfree(host);
1322 return NULL;
1323 }
1324
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001325 host->dev[0] = dev;
Bartlomiej Zolnierkiewicz6cdf6eb2008-07-24 22:53:14 +02001326
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001327 if (d) {
1328 host->init_chipset = d->init_chipset;
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001329 host->host_flags = d->host_flags;
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001330 }
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001331
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001332 return host;
1333}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001334EXPORT_SYMBOL_GPL(ide_host_alloc);
1335
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001336static void ide_port_free(ide_hwif_t *hwif)
1337{
1338 ide_port_free_devices(hwif);
1339 ide_free_port_slot(hwif->index);
1340 kfree(hwif);
1341}
1342
1343static void ide_disable_port(ide_hwif_t *hwif)
1344{
1345 struct ide_host *host = hwif->host;
1346 int i;
1347
1348 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1349
1350 for (i = 0; i < MAX_HOST_PORTS; i++) {
1351 if (host->ports[i] == hwif) {
1352 host->ports[i] = NULL;
1353 host->n_ports--;
1354 }
1355 }
1356
1357 ide_port_free(hwif);
1358}
1359
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001360int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
1361 hw_regs_t **hws)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001362{
1363 ide_hwif_t *hwif, *mate = NULL;
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001364 int i, j = 0;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001365
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001366 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001367 if (hwif == NULL) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001368 mate = NULL;
1369 continue;
1370 }
1371
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001372 ide_init_port_hw(hwif, hws[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001373 ide_port_apply_params(hwif);
1374
1375 if (d == NULL) {
1376 mate = NULL;
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +02001377 } else {
1378 if ((i & 1) && mate) {
1379 hwif->mate = mate;
1380 mate->mate = hwif;
1381 }
1382
1383 mate = (i & 1) ? NULL : hwif;
1384
1385 ide_init_port(hwif, i & 1, d);
1386 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001387 }
1388
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001389 ide_port_init_devices(hwif);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001390 }
1391
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001392 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001393 if (hwif == NULL)
1394 continue;
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001395
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001396 if (ide_probe_port(hwif) == 0)
1397 hwif->present = 1;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001398
1399 if (hwif->chipset != ide_4drives || !hwif->mate ||
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001400 !hwif->mate->present) {
1401 if (ide_register_port(hwif)) {
1402 ide_disable_port(hwif);
1403 continue;
1404 }
1405 }
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001406
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001407 if (hwif->present)
1408 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001409 }
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001410
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001411 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001412 if (hwif == NULL)
1413 continue;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001414
1415 if (hwif_init(hwif) == 0) {
1416 printk(KERN_INFO "%s: failed to initialize IDE "
1417 "interface\n", hwif->name);
Ian Campbell51d6ac72009-02-02 20:12:22 +01001418 device_unregister(&hwif->gendev);
1419 ide_disable_port(hwif);
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001420 continue;
1421 }
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001422
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001423 if (hwif->present)
Elias Oltmannse415e492008-10-13 21:39:45 +02001424 if (ide_port_setup_devices(hwif) == 0) {
1425 hwif->present = 0;
1426 continue;
1427 }
1428
1429 j++;
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +02001430
Bartlomiej Zolnierkiewicz8b803bd2009-03-24 23:22:41 +01001431 ide_acpi_init_port(hwif);
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001432
1433 if (hwif->present)
1434 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001435 }
1436
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001437 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001438 if (hwif == NULL)
1439 continue;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001440
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001441 if (hwif->present)
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001442 hwif_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001443 }
1444
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001445 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001446 if (hwif == NULL)
1447 continue;
Bartlomiej Zolnierkiewicz327617e2008-02-02 19:56:43 +01001448
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001449 ide_sysfs_register_port(hwif);
1450 ide_proc_register_port(hwif);
1451
1452 if (hwif->present)
Bartlomiej Zolnierkiewiczd9270a32008-02-02 19:56:43 +01001453 ide_proc_port_register_devices(hwif);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001454 }
1455
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001456 return j ? 0 : -1;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001457}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001458EXPORT_SYMBOL_GPL(ide_host_register);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001459
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001460int ide_host_add(const struct ide_port_info *d, hw_regs_t **hws,
1461 struct ide_host **hostp)
1462{
1463 struct ide_host *host;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001464 int rc;
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001465
1466 host = ide_host_alloc(d, hws);
1467 if (host == NULL)
1468 return -ENOMEM;
1469
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001470 rc = ide_host_register(host, d, hws);
1471 if (rc) {
1472 ide_host_free(host);
1473 return rc;
1474 }
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001475
1476 if (hostp)
1477 *hostp = host;
1478
1479 return 0;
1480}
1481EXPORT_SYMBOL_GPL(ide_host_add);
1482
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001483static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1484{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001485 ide_drive_t *drive;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001486 int i;
1487
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001488 ide_port_for_each_present_dev(i, drive, hwif) {
1489 device_unregister(&drive->gendev);
1490 wait_for_completion(&drive->gendev_rel_comp);
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001491 }
1492}
1493
1494void ide_port_unregister_devices(ide_hwif_t *hwif)
1495{
1496 mutex_lock(&ide_cfg_mtx);
1497 __ide_port_unregister_devices(hwif);
1498 hwif->present = 0;
1499 ide_port_init_devices_data(hwif);
1500 mutex_unlock(&ide_cfg_mtx);
1501}
1502EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1503
1504/**
1505 * ide_unregister - free an IDE interface
1506 * @hwif: IDE interface
1507 *
1508 * Perform the final unregister of an IDE interface.
1509 *
1510 * Locking:
1511 * The caller must not hold the IDE locks.
1512 *
1513 * It is up to the caller to be sure there is no pending I/O here,
1514 * and that the interface will not be reopened (present/vanishing
1515 * locking isn't yet done BTW).
1516 */
1517
1518static void ide_unregister(ide_hwif_t *hwif)
1519{
1520 BUG_ON(in_interrupt());
1521 BUG_ON(irqs_disabled());
1522
1523 mutex_lock(&ide_cfg_mtx);
1524
1525 if (hwif->present) {
1526 __ide_port_unregister_devices(hwif);
1527 hwif->present = 0;
1528 }
1529
1530 ide_proc_unregister_port(hwif);
1531
1532 free_irq(hwif->irq, hwif);
1533
1534 device_unregister(hwif->portdev);
1535 device_unregister(&hwif->gendev);
1536 wait_for_completion(&hwif->gendev_rel_comp);
1537
1538 /*
1539 * Remove us from the kernel's knowledge
1540 */
1541 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1542 kfree(hwif->sg_table);
1543 unregister_blkdev(hwif->major, hwif->name);
1544
1545 ide_release_dma_engine(hwif);
1546
1547 mutex_unlock(&ide_cfg_mtx);
1548}
1549
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001550void ide_host_free(struct ide_host *host)
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001551{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001552 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001553 int i;
1554
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001555 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001556 if (hwif)
1557 ide_port_free(hwif);
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001558 }
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001559
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001560 kfree(host);
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001561}
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001562EXPORT_SYMBOL_GPL(ide_host_free);
1563
1564void ide_host_remove(struct ide_host *host)
1565{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001566 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001567 int i;
1568
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001569 ide_host_for_each_port(i, hwif, host) {
1570 if (hwif)
1571 ide_unregister(hwif);
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001572 }
1573
1574 ide_host_free(host);
1575}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001576EXPORT_SYMBOL_GPL(ide_host_remove);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001577
1578void ide_port_scan(ide_hwif_t *hwif)
1579{
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001580 ide_port_apply_params(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001581 ide_port_cable_detect(hwif);
1582 ide_port_init_devices(hwif);
1583
1584 if (ide_probe_port(hwif) < 0)
1585 return;
1586
1587 hwif->present = 1;
1588
1589 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001590 ide_port_setup_devices(hwif);
Bartlomiej Zolnierkiewicze630fcb2009-01-06 17:21:00 +01001591 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001592 hwif_register_devices(hwif);
1593 ide_proc_port_register_devices(hwif);
1594}
1595EXPORT_SYMBOL_GPL(ide_port_scan);