diff options
| -rw-r--r-- | drivers/ide/pci/sl82c105.c | 71 |
1 files changed, 66 insertions, 5 deletions
diff --git a/drivers/ide/pci/sl82c105.c b/drivers/ide/pci/sl82c105.c index fe3b4b91f85..3d7759c361f 100644 --- a/drivers/ide/pci/sl82c105.c +++ b/drivers/ide/pci/sl82c105.c @@ -82,7 +82,14 @@ static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio) pio = ide_get_best_pio_mode(drive, pio, 5, &p); - drive->drive_data = drv_ctrl = get_pio_timings(&p); + drv_ctrl = get_pio_timings(&p); + + /* + * Store the PIO timings so that we can restore them + * in case DMA will be turned off... + */ + drive->drive_data &= 0xffff0000; + drive->drive_data |= drv_ctrl; if (!drive->using_dma) { /* @@ -100,14 +107,67 @@ static u8 sl82c105_tune_pio(ide_drive_t *drive, u8 pio) } /* + * Configure the drive and chipset for a new transfer speed. + */ +static int sl82c105_tune_chipset(ide_drive_t *drive, u8 speed) +{ + static u16 mwdma_timings[] = {0x0707, 0x0201, 0x0200}; + u16 drv_ctrl; + + DBG(("sl82c105_tune_chipset(drive:%s, speed:%s)\n", + drive->name, ide_xfer_verbose(speed))); + + speed = ide_rate_filter(drive, speed); + + switch (speed) { + case XFER_MW_DMA_2: + case XFER_MW_DMA_1: + case XFER_MW_DMA_0: + drv_ctrl = mwdma_timings[speed - XFER_MW_DMA_0]; + + /* + * Store the DMA timings so that we can actually program + * them when DMA will be turned on... + */ + drive->drive_data &= 0x0000ffff; + drive->drive_data |= (unsigned long)drv_ctrl << 16; + + /* + * If we are already using DMA, we just reprogram + * the drive control register. + */ + if (drive->using_dma) { + struct pci_dev *dev = HWIF(drive)->pci_dev; + int reg = 0x44 + drive->dn * 4; + + pci_write_config_word(dev, reg, drv_ctrl); + } + 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) sl82c105_tune_pio(drive, speed - XFER_PIO_0); + break; + default: + return -1; + } + + return ide_config_drive_speed(drive, speed); +} + +/* * Configure the drive for DMA. - * We'll program the chipset only when DMA is actually turned on. */ static int config_for_dma(ide_drive_t *drive) { + u8 speed = ide_max_dma_mode(drive); + DBG(("config_for_dma(drive:%s)\n", drive->name)); - if (ide_config_drive_speed(drive, XFER_MW_DMA_2) != 0) + if (!speed || sl82c105_tune_chipset(drive, speed)) return 0; return ide_dma_enable(drive); @@ -219,7 +279,7 @@ static int sl82c105_ide_dma_on(ide_drive_t *drive) rc = __ide_dma_on(drive); if (rc == 0) { - pci_write_config_word(dev, reg, 0x0200); + pci_write_config_word(dev, reg, drive->drive_data >> 16); printk(KERN_INFO "%s: DMA enabled\n", drive->name); } @@ -357,6 +417,7 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif) DBG(("init_hwif_sl82c105(hwif: ide%d)\n", hwif->index)); hwif->tuneproc = &sl82c105_tune_drive; + hwif->speedproc = &sl82c105_tune_chipset; hwif->selectproc = &sl82c105_selectproc; hwif->resetproc = &sl82c105_resetproc; @@ -388,7 +449,7 @@ static void __devinit init_hwif_sl82c105(ide_hwif_t *hwif) } hwif->atapi_dma = 1; - hwif->mwdma_mask = 0x04; + hwif->mwdma_mask = 0x07; hwif->ide_dma_check = &sl82c105_ide_dma_check; hwif->ide_dma_on = &sl82c105_ide_dma_on; |