diff options
| -rw-r--r-- | drivers/ide/pci/piix.c | 31 |
1 files changed, 22 insertions, 9 deletions
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c index eb5bab1890c..cdc3aab9ebc 100644 --- a/drivers/ide/pci/piix.c +++ b/drivers/ide/pci/piix.c @@ -222,13 +222,15 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio) u16 master_data; u8 slave_data; static DEFINE_SPINLOCK(tune_lock); + int control = 0; /* ISP RTC */ - u8 timings[][2] = { { 0, 0 }, - { 0, 0 }, - { 1, 0 }, - { 2, 1 }, - { 2, 3 }, }; + static const u8 timings[][2]= { + { 0, 0 }, + { 0, 0 }, + { 1, 0 }, + { 2, 1 }, + { 2, 3 }, }; pio = ide_get_best_pio_mode(drive, pio, 5, NULL); @@ -239,19 +241,30 @@ static void piix_tune_drive (ide_drive_t *drive, u8 pio) */ spin_lock_irqsave(&tune_lock, flags); pci_read_config_word(dev, master_port, &master_data); + + if (pio >= 2) + control |= 1; /* Programmable timing on */ + if (drive->media == ide_disk) + control |= 4; /* Prefetch, post write */ + if (pio >= 3) + control |= 2; /* IORDY */ if (is_slave) { master_data = master_data | 0x4000; - if (pio > 1) + if (pio > 1) { /* enable PPE, IE and TIME */ - master_data = master_data | 0x0070; + master_data = master_data | (control << 4); + } else { + master_data &= ~0x0070; + } pci_read_config_byte(dev, slave_port, &slave_data); slave_data = slave_data & (hwif->channel ? 0x0f : 0xf0); slave_data = slave_data | (((timings[pio][0] << 2) | timings[pio][1]) << (hwif->channel ? 4 : 0)); } else { master_data = master_data & 0xccf8; - if (pio > 1) + if (pio > 1) { /* enable PPE, IE and TIME */ - master_data = master_data | 0x0007; + master_data = master_data | control; + } master_data = master_data | (timings[pio][0] << 12) | (timings[pio][1] << 8); } pci_write_config_word(dev, master_port, master_data); |