* Given the available transfer modes this function returns
* the best available speed at or below the speed requested.
*
- * FIXME: filter also PIO/SWDMA/MWDMA modes
+ * TODO: check device PIO capabilities
*/
-u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
+static u8 ide_rate_filter(ide_drive_t *drive, u8 speed)
{
-#ifdef CONFIG_BLK_DEV_IDEDMA
ide_hwif_t *hwif = drive->hwif;
- u8 mask = hwif->ultra_mask, mode = XFER_MW_DMA_2;
+ u8 mode = ide_find_dma_mode(drive, speed);
- if (hwif->udma_filter)
- mask = hwif->udma_filter(drive);
-
- if ((mask & 0x78) && (eighty_ninty_three(drive) == 0))
- mask &= 0x07;
-
- if (mask)
- mode = fls(mask) - 1 + XFER_UDMA_0;
+ if (mode == 0) {
+ if (hwif->pio_mask)
+ mode = fls(hwif->pio_mask) - 1 + XFER_PIO_0;
+ else
+ mode = XFER_PIO_4;
+ }
// printk("%s: mode 0x%02x, speed 0x%02x\n", __FUNCTION__, mode, speed);
return min(speed, mode);
-#else /* !CONFIG_BLK_DEV_IDEDMA */
- return min(speed, (u8)XFER_PIO_4);
-#endif /* CONFIG_BLK_DEV_IDEDMA */
-}
-
-EXPORT_SYMBOL(ide_rate_filter);
-
-int ide_dma_enable (ide_drive_t *drive)
-{
- ide_hwif_t *hwif = HWIF(drive);
- struct hd_driveid *id = drive->id;
-
- return ((int) ((((id->dma_ultra >> 8) & hwif->ultra_mask) ||
- ((id->dma_mword >> 8) & hwif->mwdma_mask) ||
- ((id->dma_1word >> 8) & hwif->swdma_mask)) ? 1 : 0));
-}
-
-EXPORT_SYMBOL(ide_dma_enable);
-
-int ide_use_fast_pio(ide_drive_t *drive)
-{
- struct hd_driveid *id = drive->id;
-
- if ((id->capability & 1) && drive->autodma)
- return 1;
-
- if ((id->capability & 8) || (id->field_valid & 2))
- return 1;
-
- return 0;
}
-EXPORT_SYMBOL_GPL(ide_use_fast_pio);
-
/*
* Standard (generic) timings for PIO modes, from ATA2 specification.
* These timings are for access to the IDE data port register *only*.
return -1;
}
+unsigned int ide_pio_cycle_time(ide_drive_t *drive, u8 pio)
+{
+ struct hd_driveid *id = drive->id;
+ int cycle_time = 0;
+
+ if (id->field_valid & 2) {
+ if (id->capability & 8)
+ cycle_time = id->eide_pio_iordy;
+ else
+ cycle_time = id->eide_pio;
+ }
+
+ /* conservative "downgrade" for all pre-ATA2 drives */
+ if (pio < 3) {
+ if (cycle_time && cycle_time < ide_pio_timings[pio].cycle_time)
+ cycle_time = 0; /* use standard timing */
+ }
+
+ return cycle_time ? cycle_time : ide_pio_timings[pio].cycle_time;
+}
+
+EXPORT_SYMBOL_GPL(ide_pio_cycle_time);
+
/**
* ide_get_best_pio_mode - get PIO mode from drive
* @drive: drive to consider
* @mode_wanted: preferred mode
* @max_mode: highest allowed mode
- * @d: PIO data
*
* This routine returns the recommended PIO settings for a given drive,
* based on the drive->id information and the ide_pio_blacklist[].
* This is used by most chipset support modules when "auto-tuning".
*/
-u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode, ide_pio_data_t *d)
+u8 ide_get_best_pio_mode (ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
{
int pio_mode;
- int cycle_time = 0;
- int use_iordy = 0;
struct hd_driveid* id = drive->id;
int overridden = 0;
- if (mode_wanted != 255) {
- pio_mode = mode_wanted;
- use_iordy = (pio_mode > 2);
- } else if (!drive->id) {
- pio_mode = 0;
- } else if ((pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
- overridden = 1;
- use_iordy = (pio_mode > 2);
+ if (mode_wanted != 255)
+ return min_t(u8, mode_wanted, max_mode);
+
+ if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_BLACKLIST) == 0 &&
+ (pio_mode = ide_scan_pio_blacklist(id->model)) != -1) {
+ printk(KERN_INFO "%s: is on PIO blacklist\n", drive->name);
} else {
pio_mode = id->tPIO;
if (pio_mode > 2) { /* 2 is maximum allowed tPIO value */
overridden = 1;
}
if (id->field_valid & 2) { /* drive implements ATA2? */
- if (id->capability & 8) { /* drive supports use_iordy? */
- use_iordy = 1;
- cycle_time = id->eide_pio_iordy;
+ if (id->capability & 8) { /* IORDY supported? */
if (id->eide_pio_modes & 7) {
overridden = 0;
if (id->eide_pio_modes & 4)
else
pio_mode = 3;
}
- } else {
- cycle_time = id->eide_pio;
}
}
+ if (overridden)
+ printk(KERN_INFO "%s: tPIO > 2, assuming tPIO = 2\n",
+ drive->name);
+
/*
* Conservative "downgrade" for all pre-ATA2 drives
*/
- if (pio_mode && pio_mode < 4) {
+ if ((drive->hwif->host_flags & IDE_HFLAG_PIO_NO_DOWNGRADE) == 0 &&
+ pio_mode && pio_mode < 4) {
pio_mode--;
- overridden = 1;
- if (cycle_time && cycle_time < ide_pio_timings[pio_mode].cycle_time)
- cycle_time = 0; /* use standard timing */
+ printk(KERN_INFO "%s: applying conservative "
+ "PIO \"downgrade\"\n", drive->name);
}
}
- if (pio_mode > max_mode) {
+
+ if (pio_mode > max_mode)
pio_mode = max_mode;
- cycle_time = 0;
- }
- if (d) {
- d->pio_mode = pio_mode;
- d->cycle_time = cycle_time ? cycle_time : ide_pio_timings[pio_mode].cycle_time;
- d->use_iordy = use_iordy;
- d->overridden = overridden;
- }
+
return pio_mode;
}
EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
+/* req_pio == "255" for auto-tune */
+void ide_set_pio(ide_drive_t *drive, u8 req_pio)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 host_pio, pio;
+
+ if (hwif->set_pio_mode == NULL)
+ return;
+
+ BUG_ON(hwif->pio_mask == 0x00);
+
+ host_pio = fls(hwif->pio_mask) - 1;
+
+ pio = ide_get_best_pio_mode(drive, req_pio, host_pio);
+
+ /*
+ * TODO:
+ * - report device max PIO mode
+ * - check req_pio != 255 against device max PIO mode
+ */
+ printk(KERN_DEBUG "%s: host max PIO%d wanted PIO%d%s selected PIO%d\n",
+ drive->name, host_pio, req_pio,
+ req_pio == 255 ? "(auto-tune)" : "", pio);
+
+ (void)ide_set_pio_mode(drive, XFER_PIO_0 + pio);
+}
+
+EXPORT_SYMBOL_GPL(ide_set_pio);
+
/**
* ide_toggle_bounce - handle bounce buffering
* @drive: drive to update
blk_queue_bounce_limit(drive->queue, addr);
}
+int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ if (hwif->set_pio_mode == NULL)
+ return -1;
+
+ /*
+ * TODO: temporary hack for some legacy host drivers that didn't
+ * set transfer mode on the device in ->set_pio_mode method...
+ */
+ if (hwif->set_dma_mode == NULL) {
+ hwif->set_pio_mode(drive, mode - XFER_PIO_0);
+ return 0;
+ }
+
+ if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
+ if (ide_config_drive_speed(drive, mode))
+ return -1;
+ hwif->set_pio_mode(drive, mode - XFER_PIO_0);
+ return 0;
+ } else {
+ hwif->set_pio_mode(drive, mode - XFER_PIO_0);
+ return ide_config_drive_speed(drive, mode);
+ }
+}
+
+int ide_set_dma_mode(ide_drive_t *drive, const u8 mode)
+{
+ ide_hwif_t *hwif = drive->hwif;
+
+ if (hwif->set_dma_mode == NULL)
+ return -1;
+
+ if (hwif->host_flags & IDE_HFLAG_POST_SET_MODE) {
+ if (ide_config_drive_speed(drive, mode))
+ return -1;
+ hwif->set_dma_mode(drive, mode);
+ return 0;
+ } else {
+ hwif->set_dma_mode(drive, mode);
+ return ide_config_drive_speed(drive, mode);
+ }
+}
+
+EXPORT_SYMBOL_GPL(ide_set_dma_mode);
+
/**
* ide_set_xfer_rate - set transfer rate
* @drive: drive to set
- * @speed: speed to attempt to set
+ * @rate: speed to attempt to set
*
* General helper for setting the speed of an IDE device. This
* function knows about user enforced limits from the configuration
- * which speedproc() does not. High level drivers should never
- * invoke speedproc() directly.
+ * which ->set_pio_mode/->set_dma_mode does not.
*/
-
+
int ide_set_xfer_rate(ide_drive_t *drive, u8 rate)
{
-#ifndef CONFIG_BLK_DEV_IDEDMA
- rate = min(rate, (u8) XFER_PIO_4);
-#endif
- if(HWIF(drive)->speedproc)
- return HWIF(drive)->speedproc(drive, rate);
- else
+ ide_hwif_t *hwif = drive->hwif;
+
+ if (hwif->set_dma_mode == NULL)
return -1;
+
+ rate = ide_rate_filter(drive, rate);
+
+ if (rate >= XFER_PIO_0 && rate <= XFER_PIO_5)
+ return ide_set_pio_mode(drive, rate);
+
+ /*
+ * TODO: transfer modes 0x00-0x07 passed from the user-space are
+ * currently handled here which needs fixing (please note that such
+ * case could happen iff the transfer mode has already been set on
+ * the device by ide-proc.c::set_xfer_rate()).
+ */
+
+ return ide_set_dma_mode(drive, rate);
}
static void ide_dump_opcode(ide_drive_t *drive)
if (drive->addressing == 1) {
__u64 sectors = 0;
u32 low = 0, high = 0;
+ hwif->OUTB(drive->ctl&~0x80, IDE_CONTROL_REG);
low = ide_read_24(drive);
hwif->OUTB(drive->ctl|0x80, IDE_CONTROL_REG);
high = ide_read_24(drive);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff