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_MASK(ide_drive_t *drive, int mask)
32 const struct ide_port_ops *port_ops = drive->hwif->port_ops;
34 if (port_ops && port_ops->maskproc)
35 port_ops->maskproc(drive, mask);
38 u8 ide_read_error(ide_drive_t *drive)
42 memset(&cmd, 0, sizeof(cmd));
43 cmd.tf_flags = IDE_TFLAG_IN_ERROR;
45 drive->hwif->tp_ops->tf_read(drive, &cmd);
49 EXPORT_SYMBOL_GPL(ide_read_error);
51 void ide_fix_driveid(u16 *id)
53 #ifndef __LITTLE_ENDIAN
57 for (i = 0; i < 256; i++)
58 id[i] = __le16_to_cpu(id[i]);
60 # error "Please fix <asm/byteorder.h>"
66 * ide_fixstring() cleans up and (optionally) byte-swaps a text string,
67 * removing leading/trailing blanks and compressing internal blanks.
68 * It is primarily used to tidy up the model name/number fields as
69 * returned by the ATA_CMD_ID_ATA[PI] commands.
72 void ide_fixstring(u8 *s, const int bytecount, const int byteswap)
74 u8 *p, *end = &s[bytecount & ~1]; /* bytecount must be even */
77 /* convert from big-endian to host byte order */
78 for (p = s ; p != end ; p += 2)
79 be16_to_cpus((u16 *) p);
82 /* strip leading blanks */
84 while (s != end && *s == ' ')
86 /* compress internal blanks and strip trailing blanks */
87 while (s != end && *s) {
88 if (*s++ != ' ' || (s != end && *s && *s != ' '))
91 /* wipe out trailing garbage */
95 EXPORT_SYMBOL(ide_fixstring);
98 * This routine busy-waits for the drive status to be not "busy".
99 * It then checks the status for all of the "good" bits and none
100 * of the "bad" bits, and if all is okay it returns 0. All other
101 * cases return error -- caller may then invoke ide_error().
103 * This routine should get fixed to not hog the cpu during extra long waits..
104 * That could be done by busy-waiting for the first jiffy or two, and then
105 * setting a timer to wake up at half second intervals thereafter,
106 * until timeout is achieved, before timing out.
108 static int __ide_wait_stat(ide_drive_t *drive, u8 good, u8 bad,
109 unsigned long timeout, u8 *rstat)
111 ide_hwif_t *hwif = drive->hwif;
112 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
117 udelay(1); /* spec allows drive 400ns to assert "BUSY" */
118 stat = tp_ops->read_status(hwif);
120 if (stat & ATA_BUSY) {
121 local_save_flags(flags);
122 local_irq_enable_in_hardirq();
124 while ((stat = tp_ops->read_status(hwif)) & ATA_BUSY) {
125 if (time_after(jiffies, timeout)) {
127 * One last read after the timeout in case
128 * heavy interrupt load made us not make any
129 * progress during the timeout..
131 stat = tp_ops->read_status(hwif);
132 if ((stat & ATA_BUSY) == 0)
135 local_irq_restore(flags);
140 local_irq_restore(flags);
143 * Allow status to settle, then read it again.
144 * A few rare drives vastly violate the 400ns spec here,
145 * so we'll wait up to 10usec for a "good" status
146 * rather than expensively fail things immediately.
147 * This fix courtesy of Matthew Faupel & Niccolo Rigacci.
149 for (i = 0; i < 10; i++) {
151 stat = tp_ops->read_status(hwif);
153 if (OK_STAT(stat, good, bad)) {
163 * In case of error returns error value after doing "*startstop = ide_error()".
164 * The caller should return the updated value of "startstop" in this case,
165 * "startstop" is unchanged when the function returns 0.
167 int ide_wait_stat(ide_startstop_t *startstop, ide_drive_t *drive, u8 good,
168 u8 bad, unsigned long timeout)
173 /* bail early if we've exceeded max_failures */
174 if (drive->max_failures && (drive->failures > drive->max_failures)) {
175 *startstop = ide_stopped;
179 err = __ide_wait_stat(drive, good, bad, timeout, &stat);
182 char *s = (err == -EBUSY) ? "status timeout" : "status error";
183 *startstop = ide_error(drive, s, stat);
188 EXPORT_SYMBOL(ide_wait_stat);
191 * ide_in_drive_list - look for drive in black/white list
192 * @id: drive identifier
193 * @table: list to inspect
195 * Look for a drive in the blacklist and the whitelist tables
196 * Returns 1 if the drive is found in the table.
199 int ide_in_drive_list(u16 *id, const struct drive_list_entry *table)
201 for ( ; table->id_model; table++)
202 if ((!strcmp(table->id_model, (char *)&id[ATA_ID_PROD])) &&
203 (!table->id_firmware ||
204 strstr((char *)&id[ATA_ID_FW_REV], table->id_firmware)))
208 EXPORT_SYMBOL_GPL(ide_in_drive_list);
211 * Early UDMA66 devices don't set bit14 to 1, only bit13 is valid.
212 * We list them here and depend on the device side cable detection for them.
214 * Some optical devices with the buggy firmwares have the same problem.
216 static const struct drive_list_entry ivb_list[] = {
217 { "QUANTUM FIREBALLlct10 05" , "A03.0900" },
218 { "TSSTcorp CDDVDW SH-S202J" , "SB00" },
219 { "TSSTcorp CDDVDW SH-S202J" , "SB01" },
220 { "TSSTcorp CDDVDW SH-S202N" , "SB00" },
221 { "TSSTcorp CDDVDW SH-S202N" , "SB01" },
222 { "TSSTcorp CDDVDW SH-S202H" , "SB00" },
223 { "TSSTcorp CDDVDW SH-S202H" , "SB01" },
224 { "SAMSUNG SP0822N" , "WA100-10" },
229 * All hosts that use the 80c ribbon must use!
230 * The name is derived from upper byte of word 93 and the 80c ribbon.
232 u8 eighty_ninty_three(ide_drive_t *drive)
234 ide_hwif_t *hwif = drive->hwif;
236 int ivb = ide_in_drive_list(id, ivb_list);
238 if (hwif->cbl == ATA_CBL_PATA40_SHORT)
242 printk(KERN_DEBUG "%s: skipping word 93 validity check\n",
245 if (ata_id_is_sata(id) && !ivb)
248 if (hwif->cbl != ATA_CBL_PATA80 && !ivb)
253 * - change master/slave IDENTIFY order
254 * - force bit13 (80c cable present) check also for !ivb devices
255 * (unless the slave device is pre-ATA3)
257 if ((id[ATA_ID_HW_CONFIG] & 0x4000) ||
258 (ivb && (id[ATA_ID_HW_CONFIG] & 0x2000)))
262 if (drive->dev_flags & IDE_DFLAG_UDMA33_WARNED)
265 printk(KERN_WARNING "%s: %s side 80-wire cable detection failed, "
266 "limiting max speed to UDMA33\n",
268 hwif->cbl == ATA_CBL_PATA80 ? "drive" : "host");
270 drive->dev_flags |= IDE_DFLAG_UDMA33_WARNED;
275 int ide_driveid_update(ide_drive_t *drive)
280 id = kmalloc(SECTOR_SIZE, GFP_ATOMIC);
284 SELECT_MASK(drive, 1);
285 rc = ide_dev_read_id(drive, ATA_CMD_ID_ATA, id);
286 SELECT_MASK(drive, 0);
291 drive->id[ATA_ID_UDMA_MODES] = id[ATA_ID_UDMA_MODES];
292 drive->id[ATA_ID_MWDMA_MODES] = id[ATA_ID_MWDMA_MODES];
293 drive->id[ATA_ID_SWDMA_MODES] = id[ATA_ID_SWDMA_MODES];
294 drive->id[ATA_ID_CFA_MODES] = id[ATA_ID_CFA_MODES];
295 /* anything more ? */
299 if ((drive->dev_flags & IDE_DFLAG_USING_DMA) && ide_id_dma_bug(drive))
304 SELECT_MASK(drive, 0);
306 printk(KERN_ERR "%s: %s: bad status\n", drive->name, __func__);
311 int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
313 ide_hwif_t *hwif = drive->hwif;
314 const struct ide_tp_ops *tp_ops = hwif->tp_ops;
315 u16 *id = drive->id, i;
320 #ifdef CONFIG_BLK_DEV_IDEDMA
321 if (hwif->dma_ops) /* check if host supports DMA */
322 hwif->dma_ops->dma_host_set(drive, 0);
325 /* Skip setting PIO flow-control modes on pre-EIDE drives */
326 if ((speed & 0xf8) == XFER_PIO_0 && ata_id_has_iordy(drive->id) == 0)
330 * Don't use ide_wait_cmd here - it will
331 * attempt to set_geometry and recalibrate,
332 * but for some reason these don't work at
333 * this point (lost interrupt).
337 * FIXME: we race against the running IRQ here if
338 * this is called from non IRQ context. If we use
339 * disable_irq() we hang on the error path. Work
342 disable_irq_nosync(hwif->irq);
345 tp_ops->dev_select(drive);
346 SELECT_MASK(drive, 1);
348 tp_ops->write_devctl(hwif, ATA_NIEN | ATA_DEVCTL_OBS);
350 memset(&cmd, 0, sizeof(cmd));
351 cmd.tf_flags = IDE_TFLAG_OUT_FEATURE | IDE_TFLAG_OUT_NSECT;
352 cmd.tf.feature = SETFEATURES_XFER;
353 cmd.tf.nsect = speed;
355 tp_ops->tf_load(drive, &cmd);
357 tp_ops->exec_command(hwif, ATA_CMD_SET_FEATURES);
359 if (drive->quirk_list == 2)
360 tp_ops->write_devctl(hwif, ATA_DEVCTL_OBS);
362 error = __ide_wait_stat(drive, drive->ready_stat,
363 ATA_BUSY | ATA_DRQ | ATA_ERR,
366 SELECT_MASK(drive, 0);
368 enable_irq(hwif->irq);
371 (void) ide_dump_status(drive, "set_drive_speed_status", stat);
375 if (speed >= XFER_SW_DMA_0) {
376 id[ATA_ID_UDMA_MODES] &= ~0xFF00;
377 id[ATA_ID_MWDMA_MODES] &= ~0x0700;
378 id[ATA_ID_SWDMA_MODES] &= ~0x0700;
379 if (ata_id_is_cfa(id))
380 id[ATA_ID_CFA_MODES] &= ~0x0E00;
381 } else if (ata_id_is_cfa(id))
382 id[ATA_ID_CFA_MODES] &= ~0x01C0;
385 #ifdef CONFIG_BLK_DEV_IDEDMA
386 if (speed >= XFER_SW_DMA_0 && (drive->dev_flags & IDE_DFLAG_USING_DMA))
387 hwif->dma_ops->dma_host_set(drive, 1);
388 else if (hwif->dma_ops) /* check if host supports DMA */
389 ide_dma_off_quietly(drive);
392 if (speed >= XFER_UDMA_0) {
393 i = 1 << (speed - XFER_UDMA_0);
394 id[ATA_ID_UDMA_MODES] |= (i << 8 | i);
395 } else if (ata_id_is_cfa(id) && speed >= XFER_MW_DMA_3) {
396 i = speed - XFER_MW_DMA_2;
397 id[ATA_ID_CFA_MODES] |= i << 9;
398 } else if (speed >= XFER_MW_DMA_0) {
399 i = 1 << (speed - XFER_MW_DMA_0);
400 id[ATA_ID_MWDMA_MODES] |= (i << 8 | i);
401 } else if (speed >= XFER_SW_DMA_0) {
402 i = 1 << (speed - XFER_SW_DMA_0);
403 id[ATA_ID_SWDMA_MODES] |= (i << 8 | i);
404 } else if (ata_id_is_cfa(id) && speed >= XFER_PIO_5) {
405 i = speed - XFER_PIO_4;
406 id[ATA_ID_CFA_MODES] |= i << 6;
409 if (!drive->init_speed)
410 drive->init_speed = speed;
411 drive->current_speed = speed;
416 * This should get invoked any time we exit the driver to
417 * wait for an interrupt response from a drive. handler() points
418 * at the appropriate code to handle the next interrupt, and a
419 * timer is started to prevent us from waiting forever in case
420 * something goes wrong (see the ide_timer_expiry() handler later on).
422 * See also ide_execute_command
424 void __ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
425 unsigned int timeout)
427 ide_hwif_t *hwif = drive->hwif;
429 BUG_ON(hwif->handler);
430 hwif->handler = handler;
431 hwif->timer.expires = jiffies + timeout;
432 hwif->req_gen_timer = hwif->req_gen;
433 add_timer(&hwif->timer);
436 void ide_set_handler(ide_drive_t *drive, ide_handler_t *handler,
437 unsigned int timeout)
439 ide_hwif_t *hwif = drive->hwif;
442 spin_lock_irqsave(&hwif->lock, flags);
443 __ide_set_handler(drive, handler, timeout);
444 spin_unlock_irqrestore(&hwif->lock, flags);
446 EXPORT_SYMBOL(ide_set_handler);
449 * ide_execute_command - execute an IDE command
450 * @drive: IDE drive to issue the command against
452 * @handler: handler for next phase
453 * @timeout: timeout for command
455 * Helper function to issue an IDE command. This handles the
456 * atomicity requirements, command timing and ensures that the
457 * handler and IRQ setup do not race. All IDE command kick off
458 * should go via this function or do equivalent locking.
461 void ide_execute_command(ide_drive_t *drive, struct ide_cmd *cmd,
462 ide_handler_t *handler, unsigned timeout)
464 ide_hwif_t *hwif = drive->hwif;
467 spin_lock_irqsave(&hwif->lock, flags);
468 if ((cmd->protocol != ATAPI_PROT_DMA &&
469 cmd->protocol != ATAPI_PROT_PIO) ||
470 (drive->atapi_flags & IDE_AFLAG_DRQ_INTERRUPT))
471 __ide_set_handler(drive, handler, timeout);
472 hwif->tp_ops->exec_command(hwif, cmd->tf.command);
474 * Drive takes 400nS to respond, we must avoid the IRQ being
475 * serviced before that.
477 * FIXME: we could skip this delay with care on non shared devices
480 spin_unlock_irqrestore(&hwif->lock, flags);
484 * ide_wait_not_busy() waits for the currently selected device on the hwif
485 * to report a non-busy status, see comments in ide_probe_port().
487 int ide_wait_not_busy(ide_hwif_t *hwif, unsigned long timeout)
493 * Turn this into a schedule() sleep once I'm sure
494 * about locking issues (2.5 work ?).
497 stat = hwif->tp_ops->read_status(hwif);
498 if ((stat & ATA_BUSY) == 0)
501 * Assume a value of 0xff means nothing is connected to
502 * the interface and it doesn't implement the pull-down
507 touch_softlockup_watchdog();
508 touch_nmi_watchdog();