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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>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080039#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#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 Zolnierkiewiczca1b96e2009-05-17 19:12:21 +0200100 drive->special_flags |= IDE_SFLAG_SET_MULTMODE;
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;
Gustavo A. R. Silvaa2eed332018-07-03 14:23:05 -0500145 /* fall through */
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100146 case ide_cdrom:
147 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
148#ifdef CONFIG_PPC
149 /* kludge for Apple PowerBook internal zip */
150 if (!strstr(m, "CD-ROM") && strstr(m, "ZIP")) {
151 printk(KERN_CONT "FLOPPY");
152 type = ide_floppy;
153 break;
154 }
155#endif
156 printk(KERN_CONT "CD/DVD-ROM");
157 break;
158 case ide_tape:
159 printk(KERN_CONT "TAPE");
160 break;
161 case ide_optical:
162 printk(KERN_CONT "OPTICAL");
163 drive->dev_flags |= IDE_DFLAG_REMOVABLE;
164 break;
165 default:
166 printk(KERN_CONT "UNKNOWN (type %d)", type);
167 break;
168 }
169
170 printk(KERN_CONT " drive\n");
171 drive->media = type;
172 /* an ATAPI device ignores DRDY */
173 drive->ready_stat = 0;
174 if (ata_id_cdb_intr(id))
175 drive->atapi_flags |= IDE_AFLAG_DRQ_INTERRUPT;
176 drive->dev_flags |= IDE_DFLAG_DOORLOCKING;
177 /* we don't do head unloading on ATAPI devices */
178 drive->dev_flags |= IDE_DFLAG_NO_UNLOAD;
179}
180
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181/**
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 * do_identify - identify a drive
183 * @drive: drive to identify
184 * @cmd: command used
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100185 * @id: buffer for IDENTIFY data
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186 *
187 * Called when we have issued a drive identify command to
188 * read and parse the results. This function is run with
189 * interrupts disabled.
190 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100191
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100192static void do_identify(ide_drive_t *drive, u8 cmd, u16 *id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100194 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200195 char *m = (char *)&id[ATA_ID_PROD];
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100196 unsigned long flags;
Bartlomiej Zolnierkiewicz24630dc2009-01-02 16:12:47 +0100197 int bswap = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100199 /* local CPU only; some systems need this */
200 local_irq_save(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 /* read 512 bytes of id info */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200202 hwif->tp_ops->input_data(drive, NULL, id, SECTOR_SIZE);
Bartlomiej Zolnierkiewicz94b9efd2008-12-29 20:27:38 +0100203 local_irq_restore(flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200205 drive->dev_flags |= IDE_DFLAG_ID_READ;
Bartlomiej Zolnierkiewicz7b9f25b2008-02-01 23:09:28 +0100206#ifdef DEBUG
207 printk(KERN_INFO "%s: dumping identify data\n", drive->name);
208 ide_dump_identify((u8 *)id);
209#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 ide_fix_driveid(id);
211
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 /*
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200213 * ATA_CMD_ID_ATA returns little-endian info,
214 * ATA_CMD_ID_ATAPI *usually* returns little-endian info.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200216 if (cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200217 if ((m[0] == 'N' && m[1] == 'E') || /* NEC */
218 (m[0] == 'F' && m[1] == 'X') || /* Mitsumi */
219 (m[0] == 'P' && m[1] == 'i')) /* Pioneer */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 /* Vertos drives may still be weird */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200221 bswap ^= 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222 }
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200223
224 ide_fixstring(m, ATA_ID_PROD_LEN, bswap);
225 ide_fixstring((char *)&id[ATA_ID_FW_REV], ATA_ID_FW_REV_LEN, bswap);
226 ide_fixstring((char *)&id[ATA_ID_SERNO], ATA_ID_SERNO_LEN, bswap);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227
Tejun Heo699b0522007-11-05 21:42:25 +0100228 /* we depend on this a lot! */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200229 m[ATA_ID_PROD_LEN - 1] = '\0';
Tejun Heo699b0522007-11-05 21:42:25 +0100230
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200231 if (strstr(m, "E X A B Y T E N E S T"))
Bartlomiej Zolnierkiewicz69197ad2009-03-27 12:46:26 +0100232 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
233 else
234 drive->dev_flags |= IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235}
236
237/**
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100238 * ide_dev_read_id - send ATA/ATAPI IDENTIFY command
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 * @drive: drive to identify
240 * @cmd: command to use
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100241 * @id: buffer for IDENTIFY data
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000242 * @irq_ctx: flag set when called from the IRQ context
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 *
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100244 * Sends an ATA(PI) IDENTIFY request to a drive and waits for a response.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 *
246 * Returns: 0 device was identified
247 * 1 device timed-out (no response to identify request)
248 * 2 device aborted the command (refused to identify itself)
249 */
250
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000251int ide_dev_read_id(ide_drive_t *drive, u8 cmd, u16 *id, int irq_ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100253 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200254 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200255 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100256 int use_altstatus = 0, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 unsigned long timeout;
258 u8 s = 0, a = 0;
259
Bartlomiej Zolnierkiewicza1828072009-03-24 23:22:53 +0100260 /*
261 * Disable device IRQ. Otherwise we'll get spurious interrupts
262 * during the identify phase that the IRQ handler isn't expecting.
263 */
264 if (io_ports->ctl_addr)
Sergei Shtylyovecf3a312009-03-31 20:15:30 +0200265 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
Bartlomiej Zolnierkiewicza1828072009-03-24 23:22:53 +0100266
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 /* take a deep breath */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000268 if (irq_ctx)
269 mdelay(50);
270 else
271 msleep(50);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272
Bartlomiej Zolnierkiewicz66364872008-12-02 20:40:03 +0100273 if (io_ports->ctl_addr &&
274 (hwif->host_flags & IDE_HFLAG_BROKEN_ALTSTATUS) == 0) {
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200275 a = tp_ops->read_altstatus(hwif);
276 s = tp_ops->read_status(hwif);
Hannes Reinecke27f00e52015-03-27 16:46:33 +0100277 if ((a ^ s) & ~ATA_SENSE)
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 */
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200290 if (cmd == ATA_CMD_ID_ATAPI) {
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200291 struct ide_taskfile tf;
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200292
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200293 memset(&tf, 0, sizeof(tf));
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200294 /* disable DMA & overlap */
Sergei Shtylyovc9ff9e72009-04-08 14:13:03 +0200295 tp_ops->tf_load(drive, &tf, IDE_VALID_FEATURE);
Bartlomiej Zolnierkiewicz4e658372008-07-23 19:55:53 +0200296 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297
298 /* ask drive for ID */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200299 tp_ops->exec_command(hwif, cmd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200301 timeout = ((cmd == ATA_CMD_ID_ATA) ? WAIT_WORSTCASE : WAIT_PIDENTIFY) / 2;
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200302
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200303 /* wait for IRQ and ATA_DRQ */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000304 if (irq_ctx) {
305 rc = __ide_wait_stat(drive, ATA_DRQ, BAD_R_STAT, timeout, &s);
306 if (rc)
307 return 1;
308 } else {
309 rc = ide_busy_sleep(drive, timeout, use_altstatus);
310 if (rc)
311 return 1;
312
313 msleep(50);
314 s = tp_ops->read_status(hwif);
315 }
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100316
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200317 if (OK_STAT(s, ATA_DRQ, BAD_R_STAT)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 /* drive returned ID */
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100319 do_identify(drive, cmd, id);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 /* drive responded with ID */
321 rc = 0;
322 /* clear drive IRQ */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200323 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 } else {
325 /* drive refused ID */
326 rc = 2;
327 }
328 return rc;
329}
330
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200331int ide_busy_sleep(ide_drive_t *drive, unsigned long timeout, int altstatus)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100332{
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200333 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100334 u8 stat;
335
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200336 timeout += jiffies;
337
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100338 do {
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200339 msleep(50); /* give drive a breather */
340 stat = altstatus ? hwif->tp_ops->read_altstatus(hwif)
341 : hwif->tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200342 if ((stat & ATA_BUSY) == 0)
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100343 return 0;
344 } while (time_before(jiffies, timeout));
345
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200346 printk(KERN_ERR "%s: timeout in %s\n", drive->name, __func__);
347
Bartlomiej Zolnierkiewiczb163f462008-10-10 22:39:23 +0200348 return 1; /* drive timed-out */
Bartlomiej Zolnierkiewicz3a5015c2008-01-26 20:13:09 +0100349}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700350
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200351static u8 ide_read_device(ide_drive_t *drive)
352{
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200353 struct ide_taskfile tf;
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200354
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200355 drive->hwif->tp_ops->tf_read(drive, &tf, IDE_VALID_DEVICE);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200356
Sergei Shtylyov3153c262009-04-08 14:13:03 +0200357 return tf.device;
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200358}
359
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360/**
361 * do_probe - probe an IDE device
362 * @drive: drive to probe
363 * @cmd: command to use
364 *
365 * do_probe() has the difficult job of finding a drive if it exists,
366 * without getting hung up if it doesn't exist, without trampling on
367 * ethernet cards, and without leaving any IRQs dangling to haunt us later.
368 *
369 * If a drive is "known" to exist (from CMOS or kernel parameters),
370 * but does not respond right away, the probe will "hang in there"
371 * for the maximum wait time (about 30 seconds), otherwise it will
372 * exit much more quickly.
373 *
374 * Returns: 0 device was identified
375 * 1 device timed-out (no response to identify request)
376 * 2 device aborted the command (refused to identify itself)
377 * 3 bad status from device (possible for ATAPI drives)
378 * 4 probe was not attempted because failure was obvious
379 */
380
381static int do_probe (ide_drive_t *drive, u8 cmd)
382{
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100383 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200384 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100385 u16 *id = drive->id;
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100386 int rc;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200387 u8 present = !!(drive->dev_flags & IDE_DFLAG_PRESENT), stat;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700388
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200389 /* avoid waiting for inappropriate probes */
390 if (present && drive->media != ide_disk && cmd == ATA_CMD_ID_ATA)
391 return 4;
392
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393#ifdef DEBUG
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200394 printk(KERN_INFO "probing for %s: present=%d, media=%d, probetype=%s\n",
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200395 drive->name, present, drive->media,
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200396 (cmd == ATA_CMD_ID_ATA) ? "ATA" : "ATAPI");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397#endif
398
399 /* needed for some systems
400 * (e.g. crw9624 as drive0 with disk as slave)
401 */
402 msleep(50);
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200403 tp_ops->dev_select(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 msleep(50);
Bartlomiej Zolnierkiewicz1f2efb82008-07-23 19:55:54 +0200405
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200406 if (ide_read_device(drive) != drive->select && present == 0) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200407 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 /* exit with drive0 selected */
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200409 tp_ops->dev_select(hwif->devices[0]);
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200410 /* allow ATA_BUSY to assert & clear */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411 msleep(50);
412 }
413 /* no i/f present: mmm.. this should be a 4 -ml */
414 return 3;
415 }
416
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200417 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewiczc47137a2008-02-06 02:57:51 +0100418
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200419 if (OK_STAT(stat, ATA_DRDY, ATA_BUSY) ||
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200420 present || cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000421 rc = ide_dev_read_id(drive, cmd, id, 0);
Bartlomiej Zolnierkiewicz2ebe1d92009-03-24 23:22:59 +0100422 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 /* failed: try again */
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000424 rc = ide_dev_read_id(drive, cmd, id, 0);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100425
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200426 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100427
Bartlomiej Zolnierkiewicz3a7d2482008-10-10 22:39:21 +0200428 if (stat == (ATA_BUSY | ATA_DRDY))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 return 4;
430
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200431 if (rc == 1 && cmd == ATA_CMD_ID_ATAPI) {
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100432 printk(KERN_ERR "%s: no response (status = 0x%02x), "
433 "resetting drive\n", drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 msleep(50);
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200435 tp_ops->dev_select(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 msleep(50);
Bartlomiej Zolnierkiewiczaaaade32008-10-10 22:39:21 +0200437 tp_ops->exec_command(hwif, ATA_CMD_DEV_RESET);
Bartlomiej Zolnierkiewicz28ee9bc2009-05-22 16:23:38 +0200438 (void)ide_busy_sleep(drive, WAIT_WORSTCASE, 0);
Bartlomiej Zolnierkiewiczfa56d4c2009-06-23 11:29:11 +0000439 rc = ide_dev_read_id(drive, cmd, id, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 }
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100441
442 /* ensure drive IRQ is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200443 stat = tp_ops->read_status(hwif);
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100444
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445 if (rc == 1)
Bartlomiej Zolnierkiewicz57b55272008-02-02 19:56:45 +0100446 printk(KERN_ERR "%s: no response (status = 0x%02x)\n",
447 drive->name, stat);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448 } else {
449 /* not present or maybe ATAPI */
450 rc = 3;
451 }
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +0200452 if (drive->dn & 1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 /* exit with drive0 selected */
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200454 tp_ops->dev_select(hwif->devices[0]);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 msleep(50);
456 /* ensure drive irq is clear */
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +0200457 (void)tp_ops->read_status(hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 }
459 return rc;
460}
461
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462/**
463 * probe_for_drives - upper level drive probe
464 * @drive: drive to probe for
465 *
466 * probe_for_drive() tests for existence of a given drive using do_probe()
467 * and presents things to the user as needed.
468 *
469 * Returns: 0 no device was found
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200470 * 1 device was found
471 * (note: IDE_DFLAG_PRESENT might still be not set)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472 */
Bartlomiej Zolnierkiewicz047140a2008-12-29 20:27:36 +0100473
474static u8 probe_for_drive(ide_drive_t *drive)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475{
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200476 char *m;
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100477 int rc;
478 u8 cmd;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200479
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200480 drive->dev_flags &= ~IDE_DFLAG_ID_READ;
481
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200482 m = (char *)&drive->id[ATA_ID_PROD];
483 strcpy(m, "UNKNOWN");
484
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 /* skip probing? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200486 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 /* if !(success||timed-out) */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100488 cmd = ATA_CMD_ID_ATA;
489 rc = do_probe(drive, cmd);
490 if (rc >= 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 /* look for ATAPI device */
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100492 cmd = ATA_CMD_ID_ATAPI;
493 rc = do_probe(drive, cmd);
494 }
Bartlomiej Zolnierkiewiczc36a7e92008-10-10 22:39:23 +0200495
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200496 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Hugh Dickins5f4417a2009-06-10 14:37:20 +0200497 return 0;
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 /* identification failed? */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200500 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 if (drive->media == ide_disk) {
502 printk(KERN_INFO "%s: non-IDE drive, CHS=%d/%d/%d\n",
503 drive->name, drive->cyl,
504 drive->head, drive->sect);
505 } else if (drive->media == ide_cdrom) {
506 printk(KERN_INFO "%s: ATAPI cdrom (?)\n", drive->name);
507 } else {
508 /* nuke it */
509 printk(KERN_WARNING "%s: Unknown device on bus refused identification. Ignoring.\n", drive->name);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200510 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 }
Bartlomiej Zolnierkiewicz1bd4c1f2009-03-24 23:22:58 +0100512 } else {
513 if (cmd == ATA_CMD_ID_ATAPI)
514 ide_classify_atapi_dev(drive);
515 else
516 ide_classify_ata_dev(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700517 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 }
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200519
520 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Hugh Dickins5f4417a2009-06-10 14:37:20 +0200521 return 0;
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200522
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 /* The drive wasn't being helpful. Add generic info only */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200524 if ((drive->dev_flags & IDE_DFLAG_ID_READ) == 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 generic_id(drive);
526 return 1;
527 }
528
529 if (drive->media == ide_disk) {
530 ide_disk_init_chs(drive);
531 ide_disk_init_mult_count(drive);
532 }
533
Bartlomiej Zolnierkiewicz69197ad2009-03-27 12:46:26 +0100534 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700535}
536
Pavel Machekfc410692008-07-23 19:56:02 +0200537static void hwif_release_dev(struct device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538{
539 ide_hwif_t *hwif = container_of(dev, ide_hwif_t, gendev);
540
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800541 complete(&hwif->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542}
543
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200544static int ide_register_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545{
Randy Dunlap349ae232006-10-03 01:14:23 -0700546 int ret;
547
Linus Torvalds1da177e2005-04-16 15:20:36 -0700548 /* register with global device tree */
Kees Cook02aa2a32013-07-03 15:04:56 -0700549 dev_set_name(&hwif->gendev, "%s", hwif->name);
Greg Kroah-Hartmanfcb52072009-04-30 14:43:31 -0700550 dev_set_drvdata(&hwif->gendev, hwif);
Andreas Schwabbb54aff2009-01-19 13:46:56 +0100551 if (hwif->gendev.parent == NULL)
552 hwif->gendev.parent = hwif->dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 hwif->gendev.release = hwif_release_dev;
Bartlomiej Zolnierkiewicz96d409412009-01-02 16:12:47 +0100554
Randy Dunlap349ae232006-10-03 01:14:23 -0700555 ret = device_register(&hwif->gendev);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200556 if (ret < 0) {
Randy Dunlap349ae232006-10-03 01:14:23 -0700557 printk(KERN_WARNING "IDE: %s: device_register error: %d\n",
Harvey Harrisoneb639632008-04-26 22:25:20 +0200558 __func__, ret);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200559 goto out;
560 }
561
Greg Kroah-Hartman3ee074b2008-07-21 20:03:34 -0700562 hwif->portdev = device_create(ide_port_class, &hwif->gendev,
Kees Cook02aa2a32013-07-03 15:04:56 -0700563 MKDEV(0, 0), hwif, "%s", hwif->name);
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200564 if (IS_ERR(hwif->portdev)) {
565 ret = PTR_ERR(hwif->portdev);
566 device_unregister(&hwif->gendev);
567 }
Bartlomiej Zolnierkiewiczf74c9142008-04-18 00:46:23 +0200568out:
569 return ret;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700570}
571
Bartlomiej Zolnierkiewiczc860a8f2008-02-01 23:09:34 +0100572/**
573 * ide_port_wait_ready - wait for port to become ready
574 * @hwif: IDE port
575 *
576 * This is needed on some PPCs and a bunch of BIOS-less embedded
577 * platforms. Typical cases are:
578 *
579 * - The firmware hard reset the disk before booting the kernel,
580 * the drive is still doing it's poweron-reset sequence, that
581 * can take up to 30 seconds.
582 *
583 * - The firmware does nothing (or no firmware), the device is
584 * still in POST state (same as above actually).
585 *
586 * - Some CD/DVD/Writer combo drives tend to drive the bus during
587 * their reset sequence even when they are non-selected slave
588 * devices, thus preventing discovery of the main HD.
589 *
590 * Doing this wait-for-non-busy should not harm any existing
591 * configuration and fix some issues like the above.
592 *
593 * BenH.
594 *
595 * Returns 0 on success, error code (< 0) otherwise.
596 */
597
598static int ide_port_wait_ready(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700599{
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200600 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100601 ide_drive_t *drive;
602 int i, rc;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
604 printk(KERN_DEBUG "Probing IDE interface %s...\n", hwif->name);
605
606 /* Let HW settle down a bit from whatever init state we
607 * come from */
608 mdelay(2);
609
610 /* Wait for BSY bit to go away, spec timeout is 30 seconds,
611 * I know of at least one disk who takes 31 seconds, I use 35
612 * here to be safe
613 */
614 rc = ide_wait_not_busy(hwif, 35000);
615 if (rc)
616 return rc;
617
618 /* Now make sure both master & slave are ready */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100619 ide_port_for_each_dev(i, drive, hwif) {
Jonas Stare82661052007-11-27 21:35:53 +0100620 /* Ignore disks that we will not probe for later. */
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200621 if ((drive->dev_flags & IDE_DFLAG_NOPROBE) == 0 ||
622 (drive->dev_flags & IDE_DFLAG_PRESENT)) {
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200623 tp_ops->dev_select(drive);
624 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
Jonas Stare82661052007-11-27 21:35:53 +0100625 mdelay(2);
626 rc = ide_wait_not_busy(hwif, 35000);
627 if (rc)
628 goto out;
629 } else
630 printk(KERN_DEBUG "%s: ide_wait_not_busy() skipped\n",
631 drive->name);
632 }
633out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 /* Exit function with master reselected (let's be sane) */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100635 if (i)
Sergei Shtylyovfdd88f02009-03-31 20:15:33 +0200636 tp_ops->dev_select(hwif->devices[0]);
Jonas Stare82661052007-11-27 21:35:53 +0100637
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638 return rc;
639}
640
641/**
642 * ide_undecoded_slave - look for bad CF adapters
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200643 * @dev1: slave device
Linus Torvalds1da177e2005-04-16 15:20:36 -0700644 *
645 * Analyse the drives on the interface and attempt to decide if we
646 * have the same drive viewed twice. This occurs with crap CF adapters
647 * and PCMCIA sometimes.
648 */
649
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200650void ide_undecoded_slave(ide_drive_t *dev1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700651{
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100652 ide_drive_t *dev0 = dev1->hwif->devices[0];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700653
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200654 if ((dev1->dn & 1) == 0 || (dev0->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 return;
656
657 /* If the models don't match they are not the same product */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200658 if (strcmp((char *)&dev0->id[ATA_ID_PROD],
659 (char *)&dev1->id[ATA_ID_PROD]))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 return;
661
662 /* Serial numbers do not match */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200663 if (strncmp((char *)&dev0->id[ATA_ID_SERNO],
664 (char *)&dev1->id[ATA_ID_SERNO], ATA_ID_SERNO_LEN))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 return;
666
667 /* No serial number, thankfully very rare for CF */
Bartlomiej Zolnierkiewicz4dde4492008-10-10 22:39:19 +0200668 if (*(char *)&dev0->id[ATA_ID_SERNO] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700669 return;
670
671 /* Appears to be an IDE flash adapter with decode bugs */
672 printk(KERN_WARNING "ide-probe: ignoring undecoded slave\n");
673
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200674 dev1->dev_flags &= ~IDE_DFLAG_PRESENT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700675}
676
677EXPORT_SYMBOL_GPL(ide_undecoded_slave);
678
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100679static int ide_probe_port(ide_hwif_t *hwif)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100681 ide_drive_t *drive;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682 unsigned int irqd;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100683 int i, rc = -ENODEV;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100684
685 BUG_ON(hwif->present);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100687 if ((hwif->devices[0]->dev_flags & IDE_DFLAG_NOPROBE) &&
688 (hwif->devices[1]->dev_flags & IDE_DFLAG_NOPROBE))
Bartlomiej Zolnierkiewicz9d501522008-02-01 23:09:36 +0100689 return -EACCES;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700690
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 /*
692 * We must always disable IRQ, as probe_for_drive will assert IRQ, but
693 * we'll install our IRQ driver much later...
694 */
695 irqd = hwif->irq;
696 if (irqd)
697 disable_irq(hwif->irq);
698
David S. Miller9ce41ae2010-03-28 18:58:28 -0700699 if (ide_port_wait_ready(hwif) == -EBUSY)
700 printk(KERN_DEBUG "%s: Wait for ready failed before probe !\n", hwif->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701
702 /*
Bartlomiej Zolnierkiewiczf367bed2008-03-29 19:48:21 +0100703 * Second drive should only exist if first drive was found,
704 * but a lot of cdrom drives are configured as single slaves.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705 */
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100706 ide_port_for_each_dev(i, drive, hwif) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707 (void) probe_for_drive(drive);
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200708 if (drive->dev_flags & IDE_DFLAG_PRESENT)
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100709 rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700710 }
David S. Miller9ce41ae2010-03-28 18:58:28 -0700711
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 /*
713 * Use cached IRQ number. It might be (and is...) changed by probe
714 * code above
715 */
716 if (irqd)
717 enable_irq(irqd);
718
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +0100719 return rc;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100720}
721
722static void ide_port_tune_devices(ide_hwif_t *hwif)
723{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +0200724 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100725 ide_drive_t *drive;
726 int i;
Bartlomiej Zolnierkiewicze84e7ea2008-02-01 23:09:36 +0100727
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100728 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewicz8bc1e5a2009-06-07 15:37:09 +0200729 ide_check_nien_quirk_list(drive);
730
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100731 if (port_ops && port_ops->quirkproc)
732 port_ops->quirkproc(drive);
Bartlomiej Zolnierkiewiczf01393e2008-01-26 20:13:03 +0100733 }
Bartlomiej Zolnierkiewicz0380dad2007-06-08 15:14:29 +0200734
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100735 ide_port_for_each_present_dev(i, drive, hwif) {
736 ide_set_max_pio(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100738 drive->dev_flags |= IDE_DFLAG_NICE1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100740 if (hwif->dma_ops)
741 ide_set_dma(drive);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 }
743}
744
Bart Van Asscheca18d6f2017-06-20 11:15:41 -0700745static void ide_initialize_rq(struct request *rq)
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100746{
747 struct ide_request *req = blk_mq_rq_to_pdu(rq);
748
Bart Van Asschec8d9cf22017-06-20 11:15:42 -0700749 scsi_req_init(&req->sreq);
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100750 req->sreq.sense = req->sense;
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100751}
752
Linus Torvalds1da177e2005-04-16 15:20:36 -0700753/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700754 * init request queue
755 */
756static int ide_init_queue(ide_drive_t *drive)
757{
Jens Axboe165125e2007-07-24 09:28:11 +0200758 struct request_queue *q;
Bartlomiej Zolnierkiewicz898ec222009-01-06 17:20:52 +0100759 ide_hwif_t *hwif = drive->hwif;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760 int max_sectors = 256;
761 int max_sg_entries = PRD_ENTRIES;
762
763 /*
764 * Our default set up assumes the normal IDE case,
765 * that is 64K segmenting, standard PRD setup
766 * and LBA28. Some drivers then impose their own
767 * limits and LBA48 we could raise it but as yet
768 * do not.
769 */
Bart Van Assche5ee05242018-02-28 10:15:31 -0800770 q = blk_alloc_queue_node(GFP_KERNEL, hwif_to_node(hwif), NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 if (!q)
772 return 1;
773
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100774 q->request_fn = do_ide_request;
Bart Van Asscheca18d6f2017-06-20 11:15:41 -0700775 q->initialize_rq_fn = ide_initialize_rq;
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100776 q->cmd_size = sizeof(struct ide_request);
Bart Van Assche8b904b52018-03-07 17:10:10 -0800777 blk_queue_flag_set(QUEUE_FLAG_SCSI_PASSTHROUGH, q);
Christoph Hellwig82ed4db2017-01-27 09:46:29 +0100778 if (blk_init_allocated_queue(q) < 0) {
779 blk_cleanup_queue(q);
780 return 1;
781 }
782
Linus Torvalds1da177e2005-04-16 15:20:36 -0700783 q->queuedata = drive;
784 blk_queue_segment_boundary(q, 0xffff);
785
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 if (hwif->rqsize < max_sectors)
787 max_sectors = hwif->rqsize;
Martin K. Petersen086fa5f2010-02-26 00:20:38 -0500788 blk_queue_max_hw_sectors(q, max_sectors);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789
790#ifdef CONFIG_PCI
791 /* When we have an IOMMU, we may have a problem where pci_map_sg()
792 * creates segments that don't completely match our boundary
793 * requirements and thus need to be broken up again. Because it
794 * doesn't align properly either, we may actually have to break up
795 * to more segments than what was we got in the first place, a max
796 * worst case is twice as many.
797 * This will be fixed once we teach pci_map_sg() about our boundary
798 * requirements, hopefully soon. *FIXME*
799 */
Christoph Hellwig164c3d02018-04-03 20:29:44 +0200800 max_sg_entries >>= 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801#endif /* CONFIG_PCI */
802
Martin K. Petersen8a783622010-02-26 00:20:39 -0500803 blk_queue_max_segments(q, max_sg_entries);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700804
805 /* assign drive queue */
806 drive->queue = q;
807
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return 0;
809}
810
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +0100811static DEFINE_MUTEX(ide_cfg_mtx);
812
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813/*
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100814 * For any present drive:
815 * - allocate the block device queue
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100816 */
Elias Oltmannse415e492008-10-13 21:39:45 +0200817static int ide_port_setup_devices(ide_hwif_t *hwif)
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100818{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +0100819 ide_drive_t *drive;
Elias Oltmannse415e492008-10-13 21:39:45 +0200820 int i, j = 0;
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100821
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +0200822 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +0100823 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100824 if (ide_init_queue(drive)) {
825 printk(KERN_ERR "ide: failed to init %s\n",
826 drive->name);
Elias Oltmannse415e492008-10-13 21:39:45 +0200827 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
Bartlomiej Zolnierkiewiczffc36c72009-06-23 03:43:00 -0700838static void ide_host_enable_irqs(struct ide_host *host)
839{
840 ide_hwif_t *hwif;
841 int i;
842
843 ide_host_for_each_port(i, hwif, host) {
844 if (hwif == NULL)
845 continue;
846
847 /* clear any pending IRQs */
848 hwif->tp_ops->read_status(hwif);
849
850 /* unmask IRQs */
851 if (hwif->io_ports.ctl_addr)
852 hwif->tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
853 }
854}
855
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100856/*
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100857 * This routine sets up the IRQ for an IDE interface.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700858 */
859static int init_irq (ide_hwif_t *hwif)
860{
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200861 struct ide_io_ports *io_ports = &hwif->io_ports;
Bartlomiej Zolnierkiewicz255115fb2009-03-27 12:46:27 +0100862 struct ide_host *host = hwif->host;
863 irq_handler_t irq_handler = host->irq_handler;
864 int sa = host->irq_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865
Stanislaw Gruszka849d7132009-03-05 16:10:57 +0100866 if (irq_handler == NULL)
867 irq_handler = ide_intr;
868
Michael Schmitza259d532014-02-01 13:48:13 +1300869 if (!host->get_lock)
870 if (request_irq(hwif->irq, irq_handler, sa, hwif->name, hwif))
871 goto out_up;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872
Adrian Bunk7b892802008-02-06 01:36:29 -0800873#if !defined(__mc68000__)
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200874 printk(KERN_INFO "%s at 0x%03lx-0x%03lx,0x%03lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200875 io_ports->data_addr, io_ports->status_addr,
876 io_ports->ctl_addr, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877#else
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200878 printk(KERN_INFO "%s at 0x%08lx on irq %d", hwif->name,
Bartlomiej Zolnierkiewicz4c3032d2008-04-27 15:38:32 +0200879 io_ports->data_addr, hwif->irq);
Adrian Bunk7b892802008-02-06 01:36:29 -0800880#endif /* __mc68000__ */
Bartlomiej Zolnierkiewiczb65fac32009-01-06 17:20:50 +0100881 if (hwif->host->host_flags & IDE_HFLAG_SERIALIZE)
882 printk(KERN_CONT " (serialized)");
Bartlomiej Zolnierkiewicz1b8ebad2008-07-24 22:53:36 +0200883 printk(KERN_CONT "\n");
Bartlomiej Zolnierkiewiczd5bc6592008-02-02 19:56:41 +0100884
Linus Torvalds1da177e2005-04-16 15:20:36 -0700885 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886out_up:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 return 1;
888}
889
890static int ata_lock(dev_t dev, void *data)
891{
892 /* FIXME: we want to pin hwif down */
893 return 0;
894}
895
896static struct kobject *ata_probe(dev_t dev, int *part, void *data)
897{
898 ide_hwif_t *hwif = data;
899 int unit = *part >> PARTN_BITS;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +0100900 ide_drive_t *drive = hwif->devices[unit];
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200901
902 if ((drive->dev_flags & IDE_DFLAG_PRESENT) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903 return NULL;
904
905 if (drive->media == ide_disk)
906 request_module("ide-disk");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 if (drive->media == ide_cdrom || drive->media == ide_optical)
908 request_module("ide-cd");
909 if (drive->media == ide_tape)
910 request_module("ide-tape");
911 if (drive->media == ide_floppy)
912 request_module("ide-floppy");
913
914 return NULL;
915}
916
917static struct kobject *exact_match(dev_t dev, int *part, void *data)
918{
919 struct gendisk *p = data;
920 *part &= (1 << PARTN_BITS) - 1;
Tejun Heoed9e1982008-08-25 19:56:05 +0900921 return &disk_to_dev(p)->kobj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922}
923
924static int exact_lock(dev_t dev, void *data)
925{
926 struct gendisk *p = data;
927
Jan Kara3079c222018-02-26 13:01:38 +0100928 if (!get_disk_and_module(p))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929 return -1;
930 return 0;
931}
932
933void ide_register_region(struct gendisk *disk)
934{
935 blk_register_region(MKDEV(disk->major, disk->first_minor),
936 disk->minors, NULL, exact_match, exact_lock, disk);
937}
938
939EXPORT_SYMBOL_GPL(ide_register_region);
940
941void ide_unregister_region(struct gendisk *disk)
942{
943 blk_unregister_region(MKDEV(disk->major, disk->first_minor),
944 disk->minors);
945}
946
947EXPORT_SYMBOL_GPL(ide_unregister_region);
948
949void ide_init_disk(struct gendisk *disk, ide_drive_t *drive)
950{
951 ide_hwif_t *hwif = drive->hwif;
Bartlomiej Zolnierkiewicz7f612f22008-10-13 21:39:40 +0200952 unsigned int unit = drive->dn & 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954 disk->major = hwif->major;
955 disk->first_minor = unit << PARTN_BITS;
956 sprintf(disk->disk_name, "hd%c", 'a' + hwif->index * MAX_DRIVES + unit);
957 disk->queue = drive->queue;
958}
959
960EXPORT_SYMBOL_GPL(ide_init_disk);
961
962static void drive_release_dev (struct device *dev)
963{
964 ide_drive_t *drive = container_of(dev, ide_drive_t, gendev);
965
Bartlomiej Zolnierkiewicz5b0c4b32008-04-18 00:46:22 +0200966 ide_proc_unregister_device(drive);
967
Bartlomiej Zolnierkiewiczb5479162009-03-31 20:15:25 +0200968 blk_cleanup_queue(drive->queue);
969 drive->queue = NULL;
970
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +0200971 drive->dev_flags &= ~IDE_DFLAG_PRESENT;
Bartlomiej Zolnierkiewicz8604aff2005-05-26 14:55:34 +0200972
Aleksey Makarovf36d4022006-01-09 15:59:27 -0800973 complete(&drive->gendev_rel_comp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700974}
975
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976static int hwif_init(ide_hwif_t *hwif)
977{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700978 if (!hwif->irq) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +0100979 printk(KERN_ERR "%s: disabled, no IRQ\n", hwif->name);
980 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700982
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983 if (register_blkdev(hwif->major, hwif->name))
984 return 0;
985
986 if (!hwif->sg_max_nents)
987 hwif->sg_max_nents = PRD_ENTRIES;
988
Kees Cook6da2ec52018-06-12 13:55:00 -0700989 hwif->sg_table = kmalloc_array(hwif->sg_max_nents,
990 sizeof(struct scatterlist),
991 GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 if (!hwif->sg_table) {
993 printk(KERN_ERR "%s: unable to allocate SG table.\n", hwif->name);
994 goto out;
995 }
Jens Axboe45711f12007-10-22 21:19:53 +0200996
997 sg_init_table(hwif->sg_table, hwif->sg_max_nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999 if (init_irq(hwif)) {
Bartlomiej Zolnierkiewicz8b07ed22009-03-24 23:22:52 +01001000 printk(KERN_ERR "%s: disabled, unable to get IRQ %d\n",
1001 hwif->name, hwif->irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 goto out;
1003 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004
Bartlomiej Zolnierkiewicz3a4e7c92008-02-02 19:56:40 +01001005 blk_register_region(MKDEV(hwif->major, 0), MAX_DRIVES << PARTN_BITS,
1006 THIS_MODULE, ata_probe, ata_lock, hwif);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001007 return 1;
1008
1009out:
1010 unregister_blkdev(hwif->major, hwif->name);
1011 return 0;
1012}
1013
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001014static void hwif_register_devices(ide_hwif_t *hwif)
1015{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001016 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001017 unsigned int i;
1018
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001019 ide_port_for_each_present_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001020 struct device *dev = &drive->gendev;
1021 int ret;
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001022
Kay Sieversdc09c782008-12-29 20:27:36 +01001023 dev_set_name(dev, "%u.%u", hwif->index, i);
Greg Kroah-Hartmanfcb52072009-04-30 14:43:31 -07001024 dev_set_drvdata(dev, drive);
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001025 dev->parent = &hwif->gendev;
1026 dev->bus = &ide_bus_type;
Bartlomiej Zolnierkiewiczc5d70cc2008-02-02 19:56:41 +01001027 dev->release = drive_release_dev;
1028
1029 ret = device_register(dev);
1030 if (ret < 0)
1031 printk(KERN_WARNING "IDE: %s: device_register error: "
1032 "%d\n", __func__, ret);
Bartlomiej Zolnierkiewicz9601a602007-10-20 00:32:29 +02001033 }
1034}
1035
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001036static void ide_port_init_devices(ide_hwif_t *hwif)
1037{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001038 const struct ide_port_ops *port_ops = hwif->port_ops;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001039 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001040 int i;
1041
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001042 ide_port_for_each_dev(i, drive, hwif) {
Bartlomiej Zolnierkiewicz123995b2008-10-13 21:39:40 +02001043 drive->dn = i + hwif->channel * 2;
1044
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001045 if (hwif->host_flags & IDE_HFLAG_IO_32BIT)
1046 drive->io_32bit = 1;
Bartlomiej Zolnierkiewicz7610c4f2009-03-24 23:22:38 +01001047 if (hwif->host_flags & IDE_HFLAG_NO_IO_32BIT)
1048 drive->dev_flags |= IDE_DFLAG_NO_IO_32BIT;
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001049 if (hwif->host_flags & IDE_HFLAG_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001050 drive->dev_flags |= IDE_DFLAG_UNMASK;
Bartlomiej Zolnierkiewicz807b90d2008-02-02 19:56:40 +01001051 if (hwif->host_flags & IDE_HFLAG_NO_UNMASK_IRQS)
Bartlomiej Zolnierkiewicz97100fc2008-10-13 21:39:36 +02001052 drive->dev_flags |= IDE_DFLAG_NO_UNMASK;
Bartlomiej Zolnierkiewicz1f2cf8b2008-02-02 19:56:40 +01001053
Bartlomiej Zolnierkiewiczd2d4e782010-01-18 07:20:28 +00001054 drive->pio_mode = XFER_PIO_0;
1055
Bartlomiej Zolnierkiewicze6d95bd2008-07-16 20:33:42 +02001056 if (port_ops && port_ops->init_dev)
1057 port_ops->init_dev(drive);
1058 }
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001059}
1060
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001061static void ide_init_port(ide_hwif_t *hwif, unsigned int port,
1062 const struct ide_port_info *d)
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001063{
Adrian Bunkb7691642008-06-10 20:56:36 +02001064 hwif->channel = port;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001065
Bartlomiej Zolnierkiewicz29e52cf2009-05-17 19:12:22 +02001066 hwif->chipset = d->chipset ? d->chipset : ide_pci;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001067
1068 if (d->init_iops)
1069 d->init_iops(hwif);
1070
Bartlomiej Zolnierkiewicz23f8e4b2008-05-01 14:08:51 +02001071 /* ->host_flags may be set by ->init_iops (or even earlier...) */
1072 hwif->host_flags |= d->host_flags;
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001073 hwif->pio_mask = d->pio_mask;
1074
Bartlomiej Zolnierkiewicz374e0422008-07-23 19:55:56 +02001075 if (d->tp_ops)
1076 hwif->tp_ops = d->tp_ops;
1077
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001078 /* ->set_pio_mode for DTC2278 is currently limited to port 0 */
Bartlomiej Zolnierkiewicz2787cb82009-03-27 12:46:28 +01001079 if ((hwif->host_flags & IDE_HFLAG_DTC2278) == 0 || hwif->channel == 0)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001080 hwif->port_ops = d->port_ops;
1081
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001082 hwif->swdma_mask = d->swdma_mask;
1083 hwif->mwdma_mask = d->mwdma_mask;
1084 hwif->ultra_mask = d->udma_mask;
1085
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001086 if ((d->host_flags & IDE_HFLAG_NO_DMA) == 0) {
1087 int rc;
1088
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001089 hwif->dma_ops = d->dma_ops;
1090
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001091 if (d->init_dma)
1092 rc = d->init_dma(hwif, d);
1093 else
1094 rc = ide_hwif_setup_dma(hwif, d);
1095
1096 if (rc < 0) {
1097 printk(KERN_INFO "%s: DMA disabled\n", hwif->name);
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001098
1099 hwif->dma_ops = NULL;
Bartlomiej Zolnierkiewiczebb00fb2008-07-23 19:55:51 +02001100 hwif->dma_base = 0;
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001101 hwif->swdma_mask = 0;
1102 hwif->mwdma_mask = 0;
1103 hwif->ultra_mask = 0;
Sergei Shtylyov592b5312009-01-06 17:21:02 +01001104 }
Bartlomiej Zolnierkiewiczb123f562008-04-26 22:25:22 +02001105 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001106
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001107 if ((d->host_flags & IDE_HFLAG_SERIALIZE) ||
Bartlomiej Zolnierkiewicz702c0262008-12-29 20:27:36 +01001108 ((d->host_flags & IDE_HFLAG_SERIALIZE_DMA) && hwif->dma_base))
1109 hwif->host->host_flags |= IDE_HFLAG_SERIALIZE;
Bartlomiej Zolnierkiewicz1024c5f2008-05-04 17:03:41 +02001110
Bartlomiej Zolnierkiewicz6b492492008-12-29 20:27:34 +01001111 if (d->max_sectors)
1112 hwif->rqsize = d->max_sectors;
Bartlomiej Zolnierkiewicz70775e92009-03-27 12:46:18 +01001113 else {
1114 if ((hwif->host_flags & IDE_HFLAG_NO_LBA48) ||
1115 (hwif->host_flags & IDE_HFLAG_NO_LBA48_DMA))
1116 hwif->rqsize = 256;
1117 else
1118 hwif->rqsize = 65536;
1119 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001120
1121 /* call chipset specific routine for each enabled port */
1122 if (d->init_hwif)
1123 d->init_hwif(hwif);
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001124}
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001125
Bartlomiej Zolnierkiewiczc7f6f212008-04-18 00:46:22 +02001126static void ide_port_cable_detect(ide_hwif_t *hwif)
1127{
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001128 const struct ide_port_ops *port_ops = hwif->port_ops;
1129
1130 if (port_ops && port_ops->cable_detect && (hwif->ultra_mask & 0x78)) {
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001131 if (hwif->cbl != ATA_CBL_PATA40_SHORT)
Bartlomiej Zolnierkiewiczac95bee2008-04-26 22:25:14 +02001132 hwif->cbl = port_ops->cable_detect(hwif);
Bartlomiej Zolnierkiewiczbfa14b42008-02-02 19:56:31 +01001133 }
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001134}
1135
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001136static const u8 ide_hwif_to_major[] =
1137 { IDE0_MAJOR, IDE1_MAJOR, IDE2_MAJOR, IDE3_MAJOR, IDE4_MAJOR,
1138 IDE5_MAJOR, IDE6_MAJOR, IDE7_MAJOR, IDE8_MAJOR, IDE9_MAJOR };
1139
1140static void ide_port_init_devices_data(ide_hwif_t *hwif)
1141{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001142 ide_drive_t *drive;
1143 int i;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001144
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001145 ide_port_for_each_dev(i, drive, hwif) {
1146 u8 j = (hwif->index * MAX_DRIVES) + i;
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001147 u16 *saved_id = drive->id;
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001148 struct request *saved_sense_rq = drive->sense_rq;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001149
1150 memset(drive, 0, sizeof(*drive));
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001151 memset(saved_id, 0, SECTOR_SIZE);
1152 drive->id = saved_id;
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001153 drive->sense_rq = saved_sense_rq;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001154
1155 drive->media = ide_disk;
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001156 drive->select = (i << 4) | ATA_DEVICE_OBS;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001157 drive->hwif = hwif;
1158 drive->ready_stat = ATA_DRDY;
1159 drive->bad_wstat = BAD_W_STAT;
Bartlomiej Zolnierkiewiczca1b96e2009-05-17 19:12:21 +02001160 drive->special_flags = IDE_SFLAG_RECALIBRATE |
1161 IDE_SFLAG_SET_GEOMETRY;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001162 drive->name[0] = 'h';
1163 drive->name[1] = 'd';
1164 drive->name[2] = 'a' + j;
1165 drive->max_failures = IDE_DEFAULT_MAX_FAILURES;
1166
1167 INIT_LIST_HEAD(&drive->list);
1168 init_completion(&drive->gendev_rel_comp);
1169 }
1170}
1171
1172static void ide_init_port_data(ide_hwif_t *hwif, unsigned int index)
1173{
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001174 /* fill in any non-zero initial values */
1175 hwif->index = index;
1176 hwif->major = ide_hwif_to_major[index];
1177
1178 hwif->name[0] = 'i';
1179 hwif->name[1] = 'd';
1180 hwif->name[2] = 'e';
1181 hwif->name[3] = '0' + index;
1182
Bartlomiej Zolnierkiewicz73629512009-03-24 23:22:39 +01001183 spin_lock_init(&hwif->lock);
1184
Kees Cook10738ba2017-10-17 21:06:32 -07001185 timer_setup(&hwif->timer, ide_timer_expiry, 0);
Bartlomiej Zolnierkiewicz73629512009-03-24 23:22:39 +01001186
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001187 init_completion(&hwif->gendev_rel_comp);
1188
1189 hwif->tp_ops = &default_tp_ops;
1190
1191 ide_port_init_devices_data(hwif);
1192}
1193
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001194static void ide_init_port_hw(ide_hwif_t *hwif, struct ide_hw *hw)
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001195{
1196 memcpy(&hwif->io_ports, &hw->io_ports, sizeof(hwif->io_ports));
1197 hwif->irq = hw->irq;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001198 hwif->dev = hw->dev;
1199 hwif->gendev.parent = hw->parent ? hw->parent : hw->dev;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001200 hwif->config_data = hw->config;
1201}
1202
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001203static unsigned int ide_indexes;
1204
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001205/**
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001206 * ide_find_port_slot - find free port slot
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001207 * @d: IDE port info
1208 *
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001209 * Return the new port slot index or -ENOENT if we are out of free slots.
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001210 */
1211
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001212static int ide_find_port_slot(const struct ide_port_info *d)
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001213{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001214 int idx = -ENOENT;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001215 u8 bootable = (d && (d->host_flags & IDE_HFLAG_NON_BOOTABLE)) ? 0 : 1;
Joe Perchesa419aef2009-08-18 11:18:35 -07001216 u8 i = (d && (d->host_flags & IDE_HFLAG_QD_2ND_PORT)) ? 1 : 0;
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001217
1218 /*
1219 * Claim an unassigned slot.
1220 *
1221 * Give preference to claiming other slots before claiming ide0/ide1,
1222 * just in case there's another interface yet-to-be-scanned
1223 * which uses ports 0x1f0/0x170 (the ide0/ide1 defaults).
1224 *
1225 * Unless there is a bootable card that does not use the standard
1226 * ports 0x1f0/0x170 (the ide0/ide1 defaults).
1227 */
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001228 mutex_lock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001229 if (bootable) {
1230 if ((ide_indexes | i) != (1 << MAX_HWIFS) - 1)
1231 idx = ffz(ide_indexes | i);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001232 } else {
Bartlomiej Zolnierkiewicz75d21ff2008-10-13 21:39:33 +02001233 if ((ide_indexes | 3) != (1 << MAX_HWIFS) - 1)
1234 idx = ffz(ide_indexes | 3);
1235 else if ((ide_indexes & 3) != 3)
1236 idx = ffz(ide_indexes);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001237 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001238 if (idx >= 0)
1239 ide_indexes |= (1 << idx);
1240 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001241
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001242 return idx;
1243}
Bartlomiej Zolnierkiewiczeb3aff52008-07-16 20:33:42 +02001244
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001245static void ide_free_port_slot(int idx)
1246{
1247 mutex_lock(&ide_cfg_mtx);
1248 ide_indexes &= ~(1 << idx);
1249 mutex_unlock(&ide_cfg_mtx);
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001250}
Bartlomiej Zolnierkiewiczfe80b932008-04-26 17:36:36 +02001251
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001252static void ide_port_free_devices(ide_hwif_t *hwif)
1253{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001254 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001255 int i;
1256
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001257 ide_port_for_each_dev(i, drive, hwif) {
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001258 kfree(drive->sense_rq);
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001259 kfree(drive->id);
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001260 kfree(drive);
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001261 }
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001262}
1263
1264static int ide_port_alloc_devices(ide_hwif_t *hwif, int node)
1265{
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001266 ide_drive_t *drive;
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001267 int i;
1268
1269 for (i = 0; i < MAX_DRIVES; i++) {
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001270 drive = kzalloc_node(sizeof(*drive), GFP_KERNEL, node);
1271 if (drive == NULL)
1272 goto out_nomem;
1273
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001274 /*
1275 * In order to keep things simple we have an id
1276 * block for all drives at all times. If the device
1277 * is pre ATA or refuses ATA/ATAPI identify we
1278 * will add faked data to this.
1279 *
1280 * Also note that 0 everywhere means "can't do X"
1281 */
1282 drive->id = kzalloc_node(SECTOR_SIZE, GFP_KERNEL, node);
1283 if (drive->id == NULL)
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001284 goto out_free_drive;
1285
1286 drive->sense_rq = kmalloc(sizeof(struct request) +
1287 sizeof(struct ide_request), GFP_KERNEL);
1288 if (!drive->sense_rq)
1289 goto out_free_id;
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001290
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001291 hwif->devices[i] = drive;
1292 }
1293 return 0;
1294
Christoph Hellwig82ed4db2017-01-27 09:46:29 +01001295out_free_id:
1296 kfree(drive->id);
1297out_free_drive:
1298 kfree(drive);
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001299out_nomem:
1300 ide_port_free_devices(hwif);
1301 return -ENOMEM;
1302}
1303
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001304struct ide_host *ide_host_alloc(const struct ide_port_info *d,
1305 struct ide_hw **hws, unsigned int n_ports)
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001306{
1307 struct ide_host *host;
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001308 struct device *dev = hws[0] ? hws[0]->dev : NULL;
1309 int node = dev ? dev_to_node(dev) : -1;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001310 int i;
1311
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001312 host = kzalloc_node(sizeof(*host), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001313 if (host == NULL)
1314 return NULL;
1315
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001316 for (i = 0; i < n_ports; i++) {
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001317 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001318 int idx;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001319
1320 if (hws[i] == NULL)
1321 continue;
1322
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001323 hwif = kzalloc_node(sizeof(*hwif), GFP_KERNEL, node);
Bartlomiej Zolnierkiewicz18de10172008-07-23 19:55:58 +02001324 if (hwif == NULL)
1325 continue;
1326
Bartlomiej Zolnierkiewicz5e7f3a42009-01-06 17:20:56 +01001327 if (ide_port_alloc_devices(hwif, node) < 0) {
1328 kfree(hwif);
1329 continue;
1330 }
1331
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001332 idx = ide_find_port_slot(d);
1333 if (idx < 0) {
1334 printk(KERN_ERR "%s: no free slot for interface\n",
1335 d ? d->name : "ide");
Hugh Dickins5f4417a2009-06-10 14:37:20 +02001336 ide_port_free_devices(hwif);
Bartlomiej Zolnierkiewicz18de10172008-07-23 19:55:58 +02001337 kfree(hwif);
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001338 continue;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001339 }
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001340
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001341 ide_init_port_data(hwif, idx);
1342
Bartlomiej Zolnierkiewicz08da5912008-07-24 22:53:15 +02001343 hwif->host = host;
1344
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001345 host->ports[i] = hwif;
1346 host->n_ports++;
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001347 }
1348
1349 if (host->n_ports == 0) {
1350 kfree(host);
1351 return NULL;
1352 }
1353
Bartlomiej Zolnierkiewicza32296f2009-01-06 17:20:56 +01001354 host->dev[0] = dev;
Bartlomiej Zolnierkiewicz6cdf6eb2008-07-24 22:53:14 +02001355
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001356 if (d) {
1357 host->init_chipset = d->init_chipset;
Bartlomiej Zolnierkiewicze354c1d2009-03-27 12:46:22 +01001358 host->get_lock = d->get_lock;
1359 host->release_lock = d->release_lock;
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001360 host->host_flags = d->host_flags;
Geert Uytterhoevenaa075732009-04-08 14:12:47 +02001361 host->irq_flags = d->irq_flags;
Bartlomiej Zolnierkiewiczfeb22b72008-10-10 22:39:32 +02001362 }
Bartlomiej Zolnierkiewiczef0b0422008-07-24 22:53:19 +02001363
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001364 return host;
1365}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001366EXPORT_SYMBOL_GPL(ide_host_alloc);
1367
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001368static void ide_port_free(ide_hwif_t *hwif)
1369{
1370 ide_port_free_devices(hwif);
1371 ide_free_port_slot(hwif->index);
1372 kfree(hwif);
1373}
1374
1375static void ide_disable_port(ide_hwif_t *hwif)
1376{
1377 struct ide_host *host = hwif->host;
1378 int i;
1379
1380 printk(KERN_INFO "%s: disabling port\n", hwif->name);
1381
1382 for (i = 0; i < MAX_HOST_PORTS; i++) {
1383 if (host->ports[i] == hwif) {
1384 host->ports[i] = NULL;
1385 host->n_ports--;
1386 }
1387 }
1388
1389 ide_port_free(hwif);
1390}
1391
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001392int ide_host_register(struct ide_host *host, const struct ide_port_info *d,
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001393 struct ide_hw **hws)
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001394{
1395 ide_hwif_t *hwif, *mate = NULL;
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001396 int i, j = 0;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001397
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001398 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001399 if (hwif == NULL) {
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001400 mate = NULL;
1401 continue;
1402 }
1403
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001404 ide_init_port_hw(hwif, hws[i]);
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001405 ide_port_apply_params(hwif);
1406
Bartlomiej Zolnierkiewicz0a6e49e2009-03-27 12:46:27 +01001407 if ((i & 1) && mate) {
1408 hwif->mate = mate;
1409 mate->mate = hwif;
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001410 }
1411
Bartlomiej Zolnierkiewicz0a6e49e2009-03-27 12:46:27 +01001412 mate = (i & 1) ? NULL : hwif;
1413
1414 ide_init_port(hwif, i & 1, d);
1415 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001416
1417 hwif->port_flags |= IDE_PFLAG_PROBING;
1418
Bartlomiej Zolnierkiewicz7704ca22008-02-02 19:56:39 +01001419 ide_port_init_devices(hwif);
Bartlomiej Zolnierkiewiczc413b9b2008-02-02 19:56:31 +01001420 }
1421
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001422 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001423 if (hwif == NULL)
1424 continue;
Bartlomiej Zolnierkiewicz139ddfc2008-02-01 23:09:36 +01001425
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001426 if (ide_probe_port(hwif) == 0)
1427 hwif->present = 1;
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001428
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001429 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1430
Bartlomiej Zolnierkiewiczc094ea02009-03-27 12:46:28 +01001431 if ((hwif->host_flags & IDE_HFLAG_4DRIVES) == 0 ||
1432 hwif->mate == NULL || hwif->mate->present == 0) {
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001433 if (ide_register_port(hwif)) {
1434 ide_disable_port(hwif);
1435 continue;
1436 }
1437 }
Bartlomiej Zolnierkiewicza14dc572008-02-01 23:09:36 +01001438
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001439 if (hwif->present)
1440 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001441 }
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001442
Bartlomiej Zolnierkiewiczffc36c72009-06-23 03:43:00 -07001443 ide_host_enable_irqs(host);
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 Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001448
1449 if (hwif_init(hwif) == 0) {
1450 printk(KERN_INFO "%s: failed to initialize IDE "
1451 "interface\n", hwif->name);
Bartlomiej Zolnierkiewiczd410a642017-10-03 13:18:47 +02001452 device_unregister(hwif->portdev);
Ian Campbell51d6ac72009-02-02 20:12:22 +01001453 device_unregister(&hwif->gendev);
1454 ide_disable_port(hwif);
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001455 continue;
1456 }
Bartlomiej Zolnierkiewiczdecdc3f2008-02-02 19:56:41 +01001457
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001458 if (hwif->present)
Elias Oltmannse415e492008-10-13 21:39:45 +02001459 if (ide_port_setup_devices(hwif) == 0) {
1460 hwif->present = 0;
1461 continue;
1462 }
1463
1464 j++;
Bartlomiej Zolnierkiewicz26042d02008-04-18 00:46:22 +02001465
Bartlomiej Zolnierkiewicz8b803bd2009-03-24 23:22:41 +01001466 ide_acpi_init_port(hwif);
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001467
1468 if (hwif->present)
1469 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2e130932008-01-26 20:13:04 +01001470 }
1471
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001472 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001473 if (hwif == NULL)
1474 continue;
Bartlomiej Zolnierkiewiczba6560a2008-01-26 20:13:04 +01001475
Bartlomiej Zolnierkiewiczeb716be2008-04-26 22:25:17 +02001476 ide_sysfs_register_port(hwif);
1477 ide_proc_register_port(hwif);
1478
Wolfram Sangdbee0322010-09-02 11:28:39 +00001479 if (hwif->present) {
Bartlomiej Zolnierkiewiczd9270a32008-02-02 19:56:43 +01001480 ide_proc_port_register_devices(hwif);
Wolfram Sangdbee0322010-09-02 11:28:39 +00001481 hwif_register_devices(hwif);
1482 }
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001483 }
1484
Bartlomiej Zolnierkiewicze0d00202008-07-23 19:55:57 +02001485 return j ? 0 : -1;
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001486}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001487EXPORT_SYMBOL_GPL(ide_host_register);
Bartlomiej Zolnierkiewicz8447d9d2007-10-20 00:32:31 +02001488
Bartlomiej Zolnierkiewicz9f36d312009-05-17 19:12:25 +02001489int ide_host_add(const struct ide_port_info *d, struct ide_hw **hws,
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001490 unsigned int n_ports, struct ide_host **hostp)
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001491{
1492 struct ide_host *host;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001493 int rc;
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001494
Bartlomiej Zolnierkiewiczdca39832009-05-17 19:12:24 +02001495 host = ide_host_alloc(d, hws, n_ports);
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001496 if (host == NULL)
1497 return -ENOMEM;
1498
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001499 rc = ide_host_register(host, d, hws);
1500 if (rc) {
1501 ide_host_free(host);
1502 return rc;
1503 }
Bartlomiej Zolnierkiewicz6f904d02008-07-23 19:55:57 +02001504
1505 if (hostp)
1506 *hostp = host;
1507
1508 return 0;
1509}
1510EXPORT_SYMBOL_GPL(ide_host_add);
1511
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001512static void __ide_port_unregister_devices(ide_hwif_t *hwif)
1513{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001514 ide_drive_t *drive;
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001515 int i;
1516
Bartlomiej Zolnierkiewicz7ed5b152009-03-24 23:22:41 +01001517 ide_port_for_each_present_dev(i, drive, hwif) {
1518 device_unregister(&drive->gendev);
1519 wait_for_completion(&drive->gendev_rel_comp);
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001520 }
1521}
1522
1523void ide_port_unregister_devices(ide_hwif_t *hwif)
1524{
1525 mutex_lock(&ide_cfg_mtx);
1526 __ide_port_unregister_devices(hwif);
1527 hwif->present = 0;
1528 ide_port_init_devices_data(hwif);
1529 mutex_unlock(&ide_cfg_mtx);
1530}
1531EXPORT_SYMBOL_GPL(ide_port_unregister_devices);
1532
1533/**
1534 * ide_unregister - free an IDE interface
1535 * @hwif: IDE interface
1536 *
1537 * Perform the final unregister of an IDE interface.
1538 *
1539 * Locking:
1540 * The caller must not hold the IDE locks.
1541 *
1542 * It is up to the caller to be sure there is no pending I/O here,
1543 * and that the interface will not be reopened (present/vanishing
1544 * locking isn't yet done BTW).
1545 */
1546
1547static void ide_unregister(ide_hwif_t *hwif)
1548{
1549 BUG_ON(in_interrupt());
1550 BUG_ON(irqs_disabled());
1551
1552 mutex_lock(&ide_cfg_mtx);
1553
1554 if (hwif->present) {
1555 __ide_port_unregister_devices(hwif);
1556 hwif->present = 0;
1557 }
1558
1559 ide_proc_unregister_port(hwif);
1560
Michael Schmitza259d532014-02-01 13:48:13 +13001561 if (!hwif->host->get_lock)
1562 free_irq(hwif->irq, hwif);
Bartlomiej Zolnierkiewiczb40d1b82009-01-06 17:20:51 +01001563
1564 device_unregister(hwif->portdev);
1565 device_unregister(&hwif->gendev);
1566 wait_for_completion(&hwif->gendev_rel_comp);
1567
1568 /*
1569 * Remove us from the kernel's knowledge
1570 */
1571 blk_unregister_region(MKDEV(hwif->major, 0), MAX_DRIVES<<PARTN_BITS);
1572 kfree(hwif->sg_table);
1573 unregister_blkdev(hwif->major, hwif->name);
1574
1575 ide_release_dma_engine(hwif);
1576
1577 mutex_unlock(&ide_cfg_mtx);
1578}
1579
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001580void ide_host_free(struct ide_host *host)
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001581{
Bartlomiej Zolnierkiewicz8cdf3102008-07-23 19:55:57 +02001582 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001583 int i;
1584
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001585 ide_host_for_each_port(i, hwif, host) {
Bartlomiej Zolnierkiewicz9a100f42009-02-02 20:12:21 +01001586 if (hwif)
1587 ide_port_free(hwif);
Bartlomiej Zolnierkiewiczc97c6ac2008-07-23 19:55:50 +02001588 }
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001589
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001590 kfree(host);
Bartlomiej Zolnierkiewicz151575e2008-01-26 20:13:05 +01001591}
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001592EXPORT_SYMBOL_GPL(ide_host_free);
1593
1594void ide_host_remove(struct ide_host *host)
1595{
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001596 ide_hwif_t *hwif;
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001597 int i;
1598
Bartlomiej Zolnierkiewicz2bd24a12009-01-06 17:20:56 +01001599 ide_host_for_each_port(i, hwif, host) {
1600 if (hwif)
1601 ide_unregister(hwif);
Bartlomiej Zolnierkiewicz8a695802008-07-23 19:55:59 +02001602 }
1603
1604 ide_host_free(host);
1605}
Bartlomiej Zolnierkiewicz48c3c102008-07-23 19:55:57 +02001606EXPORT_SYMBOL_GPL(ide_host_remove);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001607
1608void ide_port_scan(ide_hwif_t *hwif)
1609{
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001610 int rc;
1611
Bartlomiej Zolnierkiewicz9fd91d92008-04-27 15:38:23 +02001612 ide_port_apply_params(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001613 ide_port_cable_detect(hwif);
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001614
1615 hwif->port_flags |= IDE_PFLAG_PROBING;
1616
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001617 ide_port_init_devices(hwif);
1618
Bartlomiej Zolnierkiewicz5880b5d2009-06-15 18:52:54 +02001619 rc = ide_probe_port(hwif);
1620
1621 hwif->port_flags &= ~IDE_PFLAG_PROBING;
1622
1623 if (rc < 0)
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001624 return;
1625
1626 hwif->present = 1;
1627
1628 ide_port_tune_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001629 ide_port_setup_devices(hwif);
Bartlomiej Zolnierkiewicze630fcb2009-01-06 17:21:00 +01001630 ide_acpi_port_init_devices(hwif);
Bartlomiej Zolnierkiewicz2dde7862008-04-18 00:46:23 +02001631 hwif_register_devices(hwif);
1632 ide_proc_port_register_devices(hwif);
1633}
1634EXPORT_SYMBOL_GPL(ide_port_scan);