2 * Copyright (C) 2000-2002 Andre Hedrick <andre@linux-ide.org>
3 * Copyright (C) 2003 Red Hat
7 #include <linux/module.h>
8 #include <linux/types.h>
9 #include <linux/string.h>
10 #include <linux/kernel.h>
11 #include <linux/timer.h>
13 #include <linux/interrupt.h>
14 #include <linux/major.h>
15 #include <linux/errno.h>
16 #include <linux/genhd.h>
17 #include <linux/blkpg.h>
18 #include <linux/slab.h>
19 #include <linux/pci.h>
20 #include <linux/delay.h>
21 #include <linux/ide.h>
22 #include <linux/bitops.h>
23 #include <linux/nmi.h>
25 #include <asm/byteorder.h>
27 #include <asm/uaccess.h>
30 void SELECT_DRIVE(ide_drive_t *drive)
32 ide_hwif_t *hwif = drive->hwif;
33 const struct ide_port_ops *port_ops = hwif->port_ops;
36 if (port_ops && port_ops->selectproc)
37 port_ops->selectproc(drive);
39 memset(&cmd, 0, sizeof(cmd));
40 cmd.tf_flags = IDE_TFLAG_OUT_DEVICE;
42 drive->hwif->tp_ops->tf_load(drive, &cmd);
45 void SELECT_MASK(ide_drive_t *drive, int mask)
47 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
49 if (port_ops && port_ops->maskproc)
50 port_ops->maskproc(drive, mask);
53 u8 ide_read_error(ide_drive_t *drive)
57 memset(&cmd, 0, sizeof(cmd));
58 cmd.tf_flags = IDE_TFLAG_IN_FEATURE;
60 drive->hwif->tp_ops->tf_read(drive, &cmd);
64 EXPORT_SYMBOL_GPL(ide_read_error);
66 void ide_fix_driveid(u16 *id)
68 #ifndef __LITTLE_ENDIAN
72 for (i = 0; i < 256; i++)
73 id[i] = __le16_to_cpu(id[i]);
75 # error "Please fix <asm/byteorder.h>"
81 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
82 * removing leading/trailing blanks and compressing internal blanks.
83 * It is primarily used to tidy up the model name/number fields as
84 * returned by the ATA_CMD_ID_ATA[PI] commands.
87 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
89 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
92 /* convert from big-endian to host byte order */
93 for (p = s ; p != end ; p += 2)
94 be16_to_cpus((u16 *) p);
97 /* strip leading blanks */
99 while (s != end && *s == ' ')
101 /* compress internal blanks and strip trailing blanks */
102 while (s != end && *s) {
103 if (*s++ != ' ' || (s != end && *s && *s != ' '))
106 /* wipe out trailing garbage */
110 EXPORT_SYMBOL(ide_fixstring);
113 * This routine busy-waits for the drive status to be not "busy".
114 * It then checks the status for all of the "good" bits and none
115 * of the "bad" bits, and if all is okay it returns 0. All other
116 * cases return error -- caller may then invoke ide_error().
118 * This routine should get fixed to not hog the cpu during extra long waits..
119 * That could be done by busy-waiting for the first jiffy or two, and then
120 * setting a timer to wake up at half second intervals thereafter,
121 * until timeout is achieved, before timing out.
123 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
124 unsigned long timeout, u8 *rstat)
126 ide_hwif_t *hwif = drive->hwif;
127 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
132 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
133 stat = tp_ops->read_status(hwif);
135 if (stat & ATA_BUSY) {
136 local_save_flags(flags);
137 local_irq_enable_in_hardirq();
139 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
140 if (time_after(jiffies, timeout)) {
142 * One last read after the timeout in case
143 * heavy interrupt load made us not make any
144 * progress during the timeout..
146 stat = tp_ops->read_status(hwif);
147 if ((stat & ATA_BUSY) == 0)
150 local_irq_restore(flags);
155 local_irq_restore(flags);
158 * Allow status to settle, then read it again.
159 * A few rare drives vastly violate the 400ns spec here,
160 * so we'll wait up to 10usec for a "good" status
161 * rather than expensively fail things immediately.
162 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
164 for (i = 0; i < 10; i++) {
166 stat = tp_ops->read_status(hwif);
168 if (OK_STAT(stat, good, bad)) {
178 * In case of error returns error value after doing "*startstop = ide_error()".
179 * The caller should return the updated value of "startstop" in this case,
180 * "startstop" is unchanged when the function returns 0.
182 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
183 u8 bad, unsigned long timeout)
188 /* bail early if we've exceeded max_failures */
189 if (drive->max_failures && (drive->failures > drive->max_failures)) {
190 *startstop = ide_stopped;
194 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
197 char *s = (err == -EBUSY) ? "status timeout" : "status error";
198 *startstop = ide_error(drive, s, stat);
203 EXPORT_SYMBOL(ide_wait_stat);
206 * ide_in_drive_list - look for drive in black/white list
207 * @id: drive identifier
208 * @table: list to inspect
210 * Look for a drive in the blacklist and the whitelist tables
211 * Returns 1 if the drive is found in the table.
214 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
216 for ( ; table->id_model; table++)
217 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
218 (!table->id_firmware ||
219 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
223 EXPORT_SYMBOL_GPL(ide_in_drive_list);
226 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
227 * We list them here and depend on the device side cable detection for them.
229 * Some optical devices with the buggy firmwares have the same problem.
231 static const struct drive_list_entry ivb_list[] = {
232 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
233 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
234 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
235 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
236 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
237 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
238 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
239 { "SAMSUNG SP0822N" , "WA100-10" },
244 * All hosts that use the 80c ribbon must use!
245 * The name is derived from upper byte of word 93 and the 80c ribbon.
247 u8 eighty_ninty_three(ide_drive_t *drive)
249 ide_hwif_t *hwif = drive->hwif;
251 int ivb = ide_in_drive_list(id, ivb_list);
253 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
257 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
260 if (ata_id_is_sata(id) && !ivb)
263 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
268 * - change master/slave IDENTIFY order
269 * - force bit13 (80c cable present) check also for !ivb devices
270 * (unless the slave device is pre-ATA3)
272 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
273 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
277 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
280 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
281 "limiting max speed to UDMA33\n",
283 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
285 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
290 int ide_driveid_update(ide_drive_t *drive)
295 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
299 SELECT_MASK(drive, 1);
300 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
301 SELECT_MASK(drive, 0);
306 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
307 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
308 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
309 /* anything more ? */
313 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
318 SELECT_MASK(drive, 0);
320 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
325 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
327 ide_hwif_t *hwif = drive->hwif;
328 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
329 u16 *id = drive->id, i;
334 #ifdef CONFIG_BLK_DEV_IDEDMA
335 if (hwif->dma_ops) /* check if host supports DMA */
336 hwif->dma_ops->dma_host_set(drive, 0);
339 /* Skip setting PIO flow-control modes on pre-EIDE drives */
340 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
344 * Don't use ide_wait_cmd here - it will
345 * attempt to set_geometry and recalibrate,
346 * but for some reason these don't work at
347 * this point (lost interrupt).
351 * FIXME: we race against the running IRQ here if
352 * this is called from non IRQ context. If we use
353 * disable_irq() we hang on the error path. Work
356 disable_irq_nosync(hwif->irq);
360 SELECT_MASK(drive, 1);
362 tp_ops->set_irq(hwif, 0);
364 memset(&cmd, 0, sizeof(cmd));
365 cmd.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
366 cmd.tf.feature = SETFEATURES_XFER;
367 cmd.tf.nsect = speed;
369 tp_ops->tf_load(drive, &cmd);
371 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
373 if (drive->quirk_list == 2)
374 tp_ops->set_irq(hwif, 1);
376 error = __ide_wait_stat(drive, drive->ready_stat,
377 ATA_BUSY | ATA_DRQ | ATA_ERR,
380 SELECT_MASK(drive, 0);
382 enable_irq(hwif->irq);
385 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
389 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
390 id[ATA_ID_MWDMA_MODES] &= ~0x0F00;
391 id[ATA_ID_SWDMA_MODES] &= ~0x0F00;
394 #ifdef CONFIG_BLK_DEV_IDEDMA
395 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
396 hwif->dma_ops->dma_host_set(drive, 1);
397 else if (hwif->dma_ops) /* check if host supports DMA */
398 ide_dma_off_quietly(drive);
401 if (speed >= XFER_UDMA_0) {
402 i = 1 << (speed - XFER_UDMA_0);
403 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
404 } else if (speed >= XFER_MW_DMA_0) {
405 i = 1 << (speed - XFER_MW_DMA_0);
406 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
407 } else if (speed >= XFER_SW_DMA_0) {
408 i = 1 << (speed - XFER_SW_DMA_0);
409 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
412 if (!drive->init_speed)
413 drive->init_speed = speed;
414 drive->current_speed = speed;
419 * This should get invoked any time we exit the driver to
420 * wait for an interrupt response from a drive. handler() points
421 * at the appropriate code to handle the next interrupt, and a
422 * timer is started to prevent us from waiting forever in case
423 * something goes wrong (see the ide_timer_expiry() handler later on).
425 * See also ide_execute_command
427 void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
428 unsigned int timeout)
430 ide_hwif_t *hwif = drive->hwif;
432 BUG_ON(hwif->handler);
433 hwif->handler = handler;
434 hwif->timer.expires = jiffies + timeout;
435 hwif->req_gen_timer = hwif->req_gen;
436 add_timer(&hwif->timer);
439 void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
440 unsigned int timeout)
442 ide_hwif_t *hwif = drive->hwif;
445 spin_lock_irqsave(&hwif->lock, flags);
446 __ide_set_handler(drive, handler, timeout);
447 spin_unlock_irqrestore(&hwif->lock, flags);
449 EXPORT_SYMBOL(ide_set_handler);
452 * ide_execute_command - execute an IDE command
453 * @drive: IDE drive to issue the command against
455 * @handler: handler for next phase
456 * @timeout: timeout for command
458 * Helper function to issue an IDE command. This handles the
459 * atomicity requirements, command timing and ensures that the
460 * handler and IRQ setup do not race. All IDE command kick off
461 * should go via this function or do equivalent locking.
464 void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
465 ide_handler_t *handler, unsigned timeout)
467 ide_hwif_t *hwif = drive->hwif;
470 spin_lock_irqsave(&hwif->lock, flags);
471 if ((cmd->protocol != ATAPI_PROT_DMA &&
472 cmd->protocol != ATAPI_PROT_PIO) ||
473 (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
474 __ide_set_handler(drive, handler, timeout);
475 hwif->tp_ops->exec_command(hwif, cmd->tf.command);
477 * Drive takes 400nS to respond, we must avoid the IRQ being
478 * serviced before that.
480 * FIXME: we could skip this delay with care on non shared devices
483 spin_unlock_irqrestore(&hwif->lock, flags);
487 * ide_wait_not_busy() waits for the currently selected device on the hwif
488 * to report a non-busy status, see comments in ide_probe_port().
490 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
496 * Turn this into a schedule() sleep once I'm sure
497 * about locking issues (2.5 work ?).
500 stat = hwif->tp_ops->read_status(hwif);
501 if ((stat & ATA_BUSY) == 0)
504 * Assume a value of 0xff means nothing is connected to
505 * the interface and it doesn't implement the pull-down
510 touch_softlockup_watchdog();
511 touch_nmi_watchdog();