diff options
| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2010-01-18 20:15:47 +0300 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@redhat.com> | 2010-03-01 22:58:45 +0300 |
| commit | 3403c24529ddfb4a47f5cfe8496370997f1b0758 (patch) | |
| tree | ce9a7a889d03f34a747902b308d2f61a059e4944 /drivers/ata/pata_cypress.c | |
| parent | 8ebf473860e8166e3d4f152a02e22b9cdddcd440 (diff) | |
| download | linux-3403c24529ddfb4a47f5cfe8496370997f1b0758.tar.xz | |
pata_cypress: fix PIO timings underclocking
Timing registers should be programmed with the desired number of clocks
minus one clock.
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata/pata_cypress.c')
| -rw-r--r-- | drivers/ata/pata_cypress.c | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c index 8fb040bf7361..ff6c37de5a12 100644 --- a/drivers/ata/pata_cypress.c +++ b/drivers/ata/pata_cypress.c @@ -62,14 +62,16 @@ static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) return; } - time_16 = clamp_val(t.recover, 0, 15) | (clamp_val(t.active, 0, 15) << 4); - time_8 = clamp_val(t.act8b, 0, 15) | (clamp_val(t.rec8b, 0, 15) << 4); + time_16 = clamp_val(t.recover - 1, 0, 15) | + (clamp_val(t.active - 1, 0, 15) << 4); + time_8 = clamp_val(t.act8b - 1, 0, 15) | + (clamp_val(t.rec8b - 1, 0, 15) << 4); if (adev->devno == 0) { pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); addr &= ~0x0F; /* Mask bits */ - addr |= clamp_val(t.setup, 0, 15); + addr |= clamp_val(t.setup - 1, 0, 15); pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); pci_write_config_byte(pdev, CY82_IDE_MASTER_IOR, time_16); @@ -79,7 +81,7 @@ static void cy82c693_set_piomode(struct ata_port *ap, struct ata_device *adev) pci_read_config_dword(pdev, CY82_IDE_ADDRSETUP, &addr); addr &= ~0xF0; /* Mask bits */ - addr |= (clamp_val(t.setup, 0, 15) << 4); + addr |= (clamp_val(t.setup - 1, 0, 15) << 4); pci_write_config_dword(pdev, CY82_IDE_ADDRSETUP, addr); pci_write_config_byte(pdev, CY82_IDE_SLAVE_IOR, time_16); |