summaryrefslogtreecommitdiff
path: root/drivers/ide/alim15x3.c
diff options
context:
space:
mode:
authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2010-01-18 10:21:26 +0300
committerDavid S. Miller <davem@davemloft.net>2010-01-19 12:52:31 +0300
commite4c7112b5686c70ba7be86dbc83c989c75aca802 (patch)
tree3c3e11ddee39d18eea78ee1d61307da9ff38aaf8 /drivers/ide/alim15x3.c
parenta345c7856e52bf8b21a5ae6a24fb824bfedefbe9 (diff)
downloadlinux-e4c7112b5686c70ba7be86dbc83c989c75aca802.tar.xz
alim15x3: fix handling of UDMA enable bit
Clear UDMA enable bit also for PIO modes. Based on libata pata_ali host driver. Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/ide/alim15x3.c')
-rw-r--r--drivers/ide/alim15x3.c43
1 files changed, 18 insertions, 25 deletions
diff --git a/drivers/ide/alim15x3.c b/drivers/ide/alim15x3.c
index 3ba7d0bdd25d..2c8016ad0e26 100644
--- a/drivers/ide/alim15x3.c
+++ b/drivers/ide/alim15x3.c
@@ -62,11 +62,22 @@ static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
}
static void ali_program_timings(ide_hwif_t *hwif, ide_drive_t *drive,
- struct ide_timing *t)
+ struct ide_timing *t, u8 ultra)
{
struct pci_dev *dev = to_pci_dev(hwif->dev);
int port = hwif->channel ? 0x5c : 0x58;
- u8 unit = drive->dn & 1;
+ int udmat = 0x56 + hwif->channel;
+ u8 unit = drive->dn & 1, udma;
+ int shift = 4 * unit;
+
+ /* Set up the UDMA */
+ pci_read_config_byte(dev, udmat, &udma);
+ udma &= ~(0x0F << shift);
+ udma |= ultra << shift;
+ pci_write_config_byte(dev, udmat, udma);
+
+ if (t == NULL)
+ return;
t->setup = clamp_val(t->setup, 1, 8) & 7;
t->act8b = clamp_val(t->act8b, 1, 8) & 7;
@@ -114,7 +125,7 @@ static void ali_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
*/
ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);
- ali_program_timings(hwif, drive, &t);
+ ali_program_timings(hwif, drive, &t, 0);
}
/**
@@ -152,29 +163,16 @@ static u8 ali_udma_filter(ide_drive_t *drive)
static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
+ static u8 udma_timing[7] = { 0xC, 0xB, 0xA, 0x9, 0x8, 0xF, 0xD };
struct pci_dev *dev = to_pci_dev(hwif->dev);
ide_drive_t *pair = ide_get_pair_dev(drive);
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
unsigned long T = 1000000 / bus_speed; /* PCI clock based */
const u8 speed = drive->dma_mode;
- u8 speed1 = speed;
- u8 unit = drive->dn & 1;
u8 tmpbyte = 0x00;
- int m5229_udma = (hwif->channel) ? 0x57 : 0x56;
struct ide_timing t;
- if (speed == XFER_UDMA_6)
- speed1 = 0x47;
-
if (speed < XFER_UDMA_0) {
- u8 ultra_enable = (unit) ? 0x7f : 0xf7;
- /*
- * clear "ultra enable" bit
- */
- pci_read_config_byte(dev, m5229_udma, &tmpbyte);
- tmpbyte &= ultra_enable;
- pci_write_config_byte(dev, m5229_udma, tmpbyte);
-
ide_timing_compute(drive, drive->dma_mode, &t, T, 1);
if (pair) {
struct ide_timing p;
@@ -189,15 +187,10 @@ static void ali_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
IDE_TIMING_SETUP | IDE_TIMING_8BIT);
}
}
- ali_program_timings(hwif, drive, &t);
+ ali_program_timings(hwif, drive, &t, 0);
} else {
- pci_read_config_byte(dev, m5229_udma, &tmpbyte);
- tmpbyte &= (0x0f << ((1-unit) << 2));
- /*
- * enable ultra dma and set timing
- */
- tmpbyte |= ((0x08 | ((4-speed1)&0x07)) << (unit << 2));
- pci_write_config_byte(dev, m5229_udma, tmpbyte);
+ ali_program_timings(hwif, drive, NULL,
+ udma_timing[speed - XFER_UDMA_0]);
if (speed >= XFER_UDMA_3) {
pci_read_config_byte(dev, 0x4b, &tmpbyte);
tmpbyte |= 1;