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sis5513: factor out UDMA programming code

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* Factor out UDMA programming code from sis_set_dma_mode() to per
  chipset family helpers: sis_{ata33,ata133}_program_udma_timings().

* Add sis_program_udma_timings() helper.

* Remove unneeded casts to 'unsigned long'.

* Minor cleanups.

There should be no functionality changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-01-25 22:17:18 +01:00
parent ad4ba7dcef
commit 428c6440ef
1 changed files with 45 additions and 33 deletions
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78
drivers/ide/pci/sis5513.c
View file

@ -305,11 +305,52 @@ static void sis_set_pio_mode(ide_drive_t *drive, const u8 pio)
sis_program_timings(drive, XFER_PIO_0 + pio);
}
static void sis_ata133_program_udma_timings(ide_drive_t *drive, const u8 mode)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u32 regdw = 0;
u8 drive_pci = sis_ata133_get_base(drive), clk, idx;
pci_read_config_dword(dev, drive_pci, &regdw);
regdw |= 0x04;
regdw &= 0xfffff00f;
/* check if ATA133 enable */
clk = (regdw & 0x08) ? ATA_133 : ATA_100;
idx = mode - XFER_UDMA_0;
regdw |= cycle_time_value[clk][idx] << 4;
regdw |= cvs_time_value[clk][idx] << 8;
pci_write_config_dword(dev, drive_pci, regdw);
}
static void sis_ata33_program_udma_timings(ide_drive_t *drive, const u8 mode)
{
struct pci_dev *dev = drive->hwif->pci_dev;
u8 drive_pci = 0x40 + drive->dn * 2, reg = 0, i = chipset_family;
pci_read_config_byte(dev, drive_pci + 1, &reg);
/* force the UDMA bit on if we want to use UDMA */
reg |= 0x80;
/* clean reg cycle time bits */
reg &= ~((0xff >> (8 - cycle_time_range[i])) << cycle_time_offset[i]);
/* set reg cycle time bits */
reg |= cycle_time_value[i][mode - XFER_UDMA_0] << cycle_time_offset[i];
pci_write_config_byte(dev, drive_pci + 1, reg);
}
static void sis_program_udma_timings(ide_drive_t *drive, const u8 mode)
{
if (chipset_family >= ATA_133) /* ATA_133 */
sis_ata133_program_udma_timings(drive, mode);
else /* ATA_33/66/100a/100/133a */
sis_ata33_program_udma_timings(drive, mode);
}
static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
/* Config chip for mode */
switch(speed) {
case XFER_UDMA_6:
@ -319,36 +360,7 @@ static void sis_set_dma_mode(ide_drive_t *drive, const u8 speed)
case XFER_UDMA_2:
case XFER_UDMA_1:
case XFER_UDMA_0:
if (chipset_family >= ATA_133) {
u32 regdw = 0;
u8 drive_pci = sis_ata133_get_base(drive);
pci_read_config_dword(dev, drive_pci, &regdw);
regdw |= 0x04;
regdw &= 0xfffff00f;
/* check if ATA133 enable */
if (regdw & 0x08) {
regdw |= (unsigned long)cycle_time_value[ATA_133][speed-XFER_UDMA_0] << 4;
regdw |= (unsigned long)cvs_time_value[ATA_133][speed-XFER_UDMA_0] << 8;
} else {
regdw |= (unsigned long)cycle_time_value[ATA_100][speed-XFER_UDMA_0] << 4;
regdw |= (unsigned long)cvs_time_value[ATA_100][speed-XFER_UDMA_0] << 8;
}
pci_write_config_dword(dev, (unsigned long)drive_pci, regdw);
} else {
u8 drive_pci = 0x40 + drive->dn * 2, reg = 0;
pci_read_config_byte(dev, drive_pci+1, &reg);
/* Force the UDMA bit on if we want to use UDMA */
reg |= 0x80;
/* clean reg cycle time bits */
reg &= ~((0xFF >> (8 - cycle_time_range[chipset_family]))
<< cycle_time_offset[chipset_family]);
/* set reg cycle time bits */
reg |= cycle_time_value[chipset_family][speed-XFER_UDMA_0]
<< cycle_time_offset[chipset_family];
pci_write_config_byte(dev, drive_pci+1, reg);
}
sis_program_udma_timings(drive, speed);
break;
case XFER_MW_DMA_2:
case XFER_MW_DMA_1: