diff options
| -rw-r--r-- | drivers/ata/pata_hpt37x.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c index 1baaca7b72ed..6fa4a2faf49c 100644 --- a/drivers/ata/pata_hpt37x.c +++ b/drivers/ata/pata_hpt37x.c @@ -920,6 +920,20 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id) pci_write_config_byte(dev, 0x5a, irqmask); /* + * HPT371 chips physically have only one channel, the secondary one, + * but the primary channel registers do exist! Go figure... + * So, we manually disable the non-existing channel here + * (if the BIOS hasn't done this already). + */ + if (dev->device == PCI_DEVICE_ID_TTI_HPT371) { + u8 mcr1; + + pci_read_config_byte(dev, 0x50, &mcr1); + mcr1 &= ~0x04; + pci_write_config_byte(dev, 0x50, mcr1); + } + + /* * default to pci clock. make sure MA15/16 are set to output * to prevent drives having problems with 40-pin cables. Needed * for some drives such as IBM-DTLA which will not enter ready |