diff options
Diffstat (limited to 'drivers/ide/pci/cmd64x.c')
| -rw-r--r-- | drivers/ide/pci/cmd64x.c | 49 |
1 files changed, 19 insertions, 30 deletions
diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c index 0e3b5de26e6..0b568c60f92 100644 --- a/drivers/ide/pci/cmd64x.c +++ b/drivers/ide/pci/cmd64x.c @@ -214,28 +214,25 @@ static void program_cycle_times (ide_drive_t *drive, int cycle_time, int active_ } /* - * This routine selects drive's best PIO mode and writes into the chipset - * registers setup/active/recovery timings. + * This routine writes into the chipset registers + * PIO setup/active/recovery timings. */ -static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted) +static void cmd64x_tune_pio(ide_drive_t *drive, const u8 pio) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_dev; unsigned int cycle_time; - u8 pio_mode, setup_count, arttim = 0; + u8 setup_count, arttim = 0; + static const u8 setup_values[] = {0x40, 0x40, 0x40, 0x80, 0, 0xc0}; static const u8 arttim_regs[4] = {ARTTIM0, ARTTIM1, ARTTIM23, ARTTIM23}; - pio_mode = ide_get_best_pio_mode(drive, mode_wanted, 5); - cycle_time = ide_pio_cycle_time(drive, pio_mode); - - cmdprintk("%s: PIO mode wanted %d, selected %d (%d ns)\n", - drive->name, mode_wanted, pio_mode, cycle_time); + cycle_time = ide_pio_cycle_time(drive, pio); program_cycle_times(drive, cycle_time, - ide_pio_timings[pio_mode].active_time); + ide_pio_timings[pio].active_time); - setup_count = quantize_timing(ide_pio_timings[pio_mode].setup_time, + setup_count = quantize_timing(ide_pio_timings[pio].setup_time, 1000 / system_bus_clock()); /* @@ -266,16 +263,14 @@ static u8 cmd64x_tune_pio (ide_drive_t *drive, u8 mode_wanted) arttim |= setup_values[setup_count]; (void) pci_write_config_byte(dev, arttim_regs[drive->dn], arttim); cmdprintk("Write 0x%02x to reg 0x%x\n", arttim, arttim_regs[drive->dn]); - - return pio_mode; } /* * Attempts to set drive's PIO mode. - * Special cases are 8: prefetch off, 9: prefetch on (both never worked), - * and 255: auto-select best mode (used at boot time). + * Special cases are 8: prefetch off, 9: prefetch on (both never worked) */ -static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio) + +static void cmd64x_set_pio_mode(ide_drive_t *drive, const u8 pio) { /* * Filter out the prefetch control values @@ -284,19 +279,17 @@ static void cmd64x_tune_drive (ide_drive_t *drive, u8 pio) if (pio == 8 || pio == 9) return; - pio = cmd64x_tune_pio(drive, pio); + cmd64x_tune_pio(drive, pio); (void) ide_config_drive_speed(drive, XFER_PIO_0 + pio); } -static int cmd64x_tune_chipset (ide_drive_t *drive, u8 speed) +static int cmd64x_tune_chipset(ide_drive_t *drive, const u8 speed) { ide_hwif_t *hwif = HWIF(drive); struct pci_dev *dev = hwif->pci_dev; u8 unit = drive->dn & 0x01; u8 regU = 0, pciU = hwif->channel ? UDIDETCR1 : UDIDETCR0; - speed = ide_rate_filter(drive, speed); - if (speed >= XFER_SW_DMA_0) { (void) pci_read_config_byte(dev, pciU, ®U); regU &= ~(unit ? 0xCA : 0x35); @@ -330,14 +323,6 @@ static int cmd64x_tune_chipset (ide_drive_t *drive, u8 speed) case XFER_MW_DMA_0: program_cycle_times(drive, 480, 215); break; - case XFER_PIO_5: - case XFER_PIO_4: - case XFER_PIO_3: - case XFER_PIO_2: - case XFER_PIO_1: - case XFER_PIO_0: - (void) cmd64x_tune_pio(drive, speed - XFER_PIO_0); - break; default: return 1; } @@ -354,7 +339,7 @@ static int cmd64x_config_drive_for_dma (ide_drive_t *drive) return 0; if (ide_use_fast_pio(drive)) - cmd64x_tune_drive(drive, 255); + ide_set_max_pio(drive); return -1; } @@ -538,7 +523,7 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif) pci_read_config_byte(dev, PCI_REVISION_ID, &rev); - hwif->tuneproc = &cmd64x_tune_drive; + hwif->set_pio_mode = &cmd64x_set_pio_mode; hwif->speedproc = &cmd64x_tune_chipset; hwif->drives[0].autotune = hwif->drives[1].autotune = 1; @@ -622,6 +607,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x00,0x00,0x00}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x00, /* no udma */ },{ /* 1 */ @@ -632,6 +618,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x07, /* udma0-2 */ },{ /* 2 */ @@ -642,6 +629,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x1f, /* udma0-4 */ },{ /* 3 */ @@ -652,6 +640,7 @@ static ide_pci_device_t cmd64x_chipsets[] __devinitdata = { .autodma = AUTODMA, .enablebits = {{0x51,0x04,0x04}, {0x51,0x08,0x08}}, .bootable = ON_BOARD, + .host_flags = IDE_HFLAG_ABUSE_PREFETCH, .pio_mask = ATA_PIO5, .udma_mask = 0x3f, /* udma0-5 */ } |