ide: IORDY handling fixes

Add ide_pio_need_iordy() helper and convert host drivers to use it.

This fixes it8172, it8213, pdc202xx_old, piix, slc90e66 and siimage
host drivers to handle IORDY correctly.
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent 6dae44f9
......@@ -185,8 +185,7 @@ static void at91_ide_set_pio_mode(ide_drive_t *drive, const u8 pio)
timing = ide_timing_find_mode(XFER_PIO_0 + pio);
BUG_ON(!timing);
if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
!(ata_id_is_cfa(drive->id) && pio > 4))
if (ide_pio_need_iordy(drive, pio))
use_iordy = 1;
apply_timings(chipselect, pio, timing, use_iordy);
......
......@@ -107,6 +107,12 @@ u8 ide_get_best_pio_mode(ide_drive_t *drive, u8 mode_wanted, u8 max_mode)
}
EXPORT_SYMBOL_GPL(ide_get_best_pio_mode);
int ide_pio_need_iordy(ide_drive_t *drive, const u8 pio)
{
return ata_id_pio_need_iordy(drive->id, pio);
}
EXPORT_SYMBOL_GPL(ide_pio_need_iordy);
int ide_set_pio_mode(ide_drive_t *drive, const u8 mode)
{
ide_hwif_t *hwif = drive->hwif;
......
......@@ -66,7 +66,7 @@ static void it8172_set_pio_mode(ide_drive_t *drive, const u8 pio)
if (drive->media == ide_disk)
/* enable prefetch */
drive_enables |= 0x0004 << (drive->dn * 4);
if (ata_id_has_iordy(drive->id))
if (ide_pio_need_iordy(drive, pio))
/* enable IORDY sample-point */
drive_enables |= 0x0002 << (drive->dn * 4);
......
......@@ -50,7 +50,7 @@ static void it8213_set_pio_mode(ide_drive_t *drive, const u8 pio)
control |= 1; /* Programmable timing on */
if (drive->media != ide_disk)
control |= 4; /* ATAPI */
if (pio > 2)
if (ide_pio_need_iordy(drive, pio))
control |= 2; /* IORDY */
if (is_slave) {
master_data |= 0x4000;
......
......@@ -73,7 +73,7 @@ static void pdc202xx_set_mode(ide_drive_t *drive, const u8 speed)
* Prefetch_EN / IORDY_EN / PA[3:0] bits of register A
*/
AP &= ~0x3f;
if (ata_id_iordy_disable(drive->id))
if (ide_pio_need_iordy(drive, speed - XFER_PIO_0))
AP |= 0x20; /* set IORDY_EN bit */
if (drive->media == ide_disk)
AP |= 0x10; /* set Prefetch_EN bit */
......
......@@ -98,7 +98,7 @@ static void piix_set_pio_mode(ide_drive_t *drive, const u8 pio)
control |= 1; /* Programmable timing on */
if (drive->media == ide_disk)
control |= 4; /* Prefetch, post write */
if (pio > 2)
if (ide_pio_need_iordy(drive, pio))
control |= 2; /* IORDY */
if (is_slave) {
master_data |= 0x4000;
......
......@@ -32,7 +32,6 @@
* smarter code in libata.
*
* TODO:
* - IORDY fixes
* - VDMA support
*/
......@@ -234,8 +233,7 @@ static u8 sil_sata_udma_filter(ide_drive_t *drive)
* @pio: PIO mode number
*
* Load the timing settings for this device mode into the
* controller. If we are in PIO mode 3 or 4 turn on IORDY
* monitoring (bit 9). The TF timing is bits 31:16
* controller.
*/
static void sil_set_pio_mode(ide_drive_t *drive, u8 pio)
......@@ -276,13 +274,16 @@ static void sil_set_pio_mode(ide_drive_t *drive, u8 pio)
/* now set up IORDY */
speedp = sil_ioread16(dev, tfaddr - 2);
speedp &= ~0x200;
if (pio > 2)
speedp |= 0x200;
sil_iowrite16(dev, speedp, tfaddr - 2);
mode = sil_ioread8(dev, base + addr_mask);
mode &= ~(unit ? 0x30 : 0x03);
mode |= unit ? 0x10 : 0x01;
if (ide_pio_need_iordy(drive, pio)) {
speedp |= 0x200;
mode |= unit ? 0x10 : 0x01;
}
sil_iowrite16(dev, speedp, tfaddr - 2);
sil_iowrite8(dev, mode, base + addr_mask);
}
......
......@@ -61,8 +61,7 @@ static unsigned int get_pio_timings(ide_drive_t *drive, u8 pio)
if (cmd_off == 0)
cmd_off = 1;
if ((pio > 2 || ata_id_has_iordy(drive->id)) &&
!(pio > 4 && ata_id_is_cfa(drive->id)))
if (ide_pio_need_iordy(drive, pio))
iordy = 0x40;
return (cmd_on - 1) << 8 | (cmd_off - 1) | iordy;
......
......@@ -44,7 +44,7 @@ static void slc90e66_set_pio_mode(ide_drive_t *drive, const u8 pio)
control |= 1; /* Programmable timing on */
if (drive->media == ide_disk)
control |= 4; /* Prefetch, post write */
if (pio > 2)
if (ide_pio_need_iordy(drive, pio))
control |= 2; /* IORDY */
if (is_slave) {
master_data |= 0x4000;
......
......@@ -1514,6 +1514,7 @@ int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
int ide_scan_pio_blacklist(char *);
const char *ide_xfer_verbose(u8);
u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
int ide_pio_need_iordy(ide_drive_t *, const u8);
int ide_set_pio_mode(ide_drive_t *, u8);
int ide_set_dma_mode(ide_drive_t *, u8);
void ide_set_pio(ide_drive_t *, u8);
......
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