*
* Documentation:
*
- * Publically available from Intel web site. Errata documentation
- * is also publically available. As an aide to anyone hacking on this
+ * Publicly available from Intel web site. Errata documentation
+ * is also publicly available. As an aide to anyone hacking on this
* driver the list of errata that are relevant is below.going back to
* PIIX4. Older device documentation is now a bit tricky to find.
*
/**
* piix_set_pio_mode - set host controller for PIO mode
+ * @port: port
* @drive: drive
- * @pio: PIO mode number
*
* Set the interface PIO mode based upon the settings done by AMI BIOS.
*/
-static void piix_set_pio_mode(ide_drive_t *drive, const u8 pio)
+static void piix_set_pio_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
struct pci_dev *dev = to_pci_dev(hwif->dev);
int is_slave = drive->dn & 1;
int master_port = hwif->channel ? 0x42 : 0x40;
u8 slave_data;
static DEFINE_SPINLOCK(tune_lock);
int control = 0;
+ const u8 pio = drive->pio_mode - XFER_PIO_0;
/* ISP RTC */
static const u8 timings[][2]= {
/**
* piix_set_dma_mode - set host controller for DMA mode
+ * @hwif: port
* @drive: drive
- * @speed: DMA mode
*
* Set a PIIX host controller to the desired DMA mode. This involves
* programming the right timing data into the PCI configuration space.
*/
-static void piix_set_dma_mode(ide_drive_t *drive, const u8 speed)
+static void piix_set_dma_mode(ide_hwif_t *hwif, ide_drive_t *drive)
{
- ide_hwif_t *hwif = drive->hwif;
struct pci_dev *dev = to_pci_dev(hwif->dev);
u8 maslave = hwif->channel ? 0x42 : 0x40;
int a_speed = 3 << (drive->dn * 4);
int sitre;
u16 reg4042, reg4a;
u8 reg48, reg54, reg55;
+ const u8 speed = drive->dma_mode;
pci_read_config_word(dev, maslave, ®4042);
sitre = (reg4042 & 0x4000) ? 1 : 0;
pci_write_config_byte(dev, 0x54, reg54 & ~v_flag);
} else {
const u8 mwdma_to_pio[] = { 0, 3, 4 };
- u8 pio;
if (reg48 & u_flag)
pci_write_config_byte(dev, 0x48, reg48 & ~u_flag);
pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
if (speed >= XFER_MW_DMA_0)
- pio = mwdma_to_pio[speed - XFER_MW_DMA_0];
+ drive->pio_mode =
+ mwdma_to_pio[speed - XFER_MW_DMA_0] + XFER_PIO_0;
else
- pio = 2; /* only SWDMA2 is allowed */
+ drive->pio_mode = XFER_PIO_2; /* for SWDMA2 */
- piix_set_pio_mode(drive, pio);
+ piix_set_pio_mode(hwif, drive);
}
}