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| author | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:53 +0200 |
|---|---|---|
| committer | Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> | 2007-10-16 22:29:53 +0200 |
| commit | 94c7fa0fcc89571b24c90e0a7545ad31aa390f24 (patch) | |
| tree | 6414a32910ca6f089754f2daa053696c255f544f /drivers/ide/pci/atiixp.c | |
| parent | cb824c32f1163a8004d0e2f484ded84255caebf4 (diff) | |
| download | linux-94c7fa0fcc89571b24c90e0a7545ad31aa390f24.tar.bz2 | |
atiixp: DMA setup fixes
* Fix handling of unsupported/invalid modes in atiixp_set_dma_mode().
* ATI controllers allow separate PIO and DMA timings so remove programming
of PIO modes from atiixp_set_dma_mode(). Also remove no longer needed
atiixp_dma_2_pio() helper.
* SWDMA timings are not programmed by atiixp_set_dma_mode() and if SWDMA
mode is chosen atiixp_dma_host_on() erroneously enables UDMA, just disable
support for SWDMA modes for now.
* Enable support for MWDMA0 mode.
* Bump driver version.
Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers/ide/pci/atiixp.c')
| -rw-r--r-- | drivers/ide/pci/atiixp.c | 53 |
1 files changed, 5 insertions, 48 deletions
diff --git a/drivers/ide/pci/atiixp.c b/drivers/ide/pci/atiixp.c index 0eb97f021d39..14a61b1c80ac 100644 --- a/drivers/ide/pci/atiixp.c +++ b/drivers/ide/pci/atiixp.c @@ -1,5 +1,5 @@ /* - * linux/drivers/ide/pci/atiixp.c Version 0.02 Jun 16 2007 + * linux/drivers/ide/pci/atiixp.c Version 0.03 Aug 3 2007 * * Copyright (C) 2003 ATI Inc. <hyu@ati.com> * Copyright (C) 2004,2007 Bartlomiej Zolnierkiewicz @@ -47,43 +47,6 @@ static int save_mdma_mode[4]; static DEFINE_SPINLOCK(atiixp_lock); -/** - * atiixp_dma_2_pio - return the PIO mode matching DMA - * @xfer_rate: transfer speed - * - * Returns the nearest equivalent PIO timing for the PIO or DMA - * mode requested by the controller. - */ - -static u8 atiixp_dma_2_pio(u8 xfer_rate) { - switch(xfer_rate) { - case XFER_UDMA_6: - case XFER_UDMA_5: - case XFER_UDMA_4: - case XFER_UDMA_3: - case XFER_UDMA_2: - case XFER_UDMA_1: - case XFER_UDMA_0: - case XFER_MW_DMA_2: - case XFER_PIO_4: - return 4; - case XFER_MW_DMA_1: - case XFER_PIO_3: - return 3; - case XFER_SW_DMA_2: - case XFER_PIO_2: - return 2; - case XFER_MW_DMA_0: - case XFER_SW_DMA_1: - case XFER_SW_DMA_0: - case XFER_PIO_1: - case XFER_PIO_0: - case XFER_PIO_SLOW: - default: - return 0; - } -} - static void atiixp_dma_host_on(ide_drive_t *drive) { struct pci_dev *dev = drive->hwif->pci_dev; @@ -169,7 +132,9 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed) int timing_shift = (drive->dn & 2) ? 16 : 0 + (drive->dn & 1) ? 0 : 8; u32 tmp32; u16 tmp16; - u8 pio; + + if (speed < XFER_MW_DMA_0) + return; spin_lock_irqsave(&atiixp_lock, flags); @@ -191,13 +156,6 @@ static void atiixp_set_dma_mode(ide_drive_t *drive, const u8 speed) } spin_unlock_irqrestore(&atiixp_lock, flags); - - if (speed >= XFER_SW_DMA_0) - pio = atiixp_dma_2_pio(speed); - else - pio = speed - XFER_PIO_0; - - atiixp_set_pio_mode(drive, pio); } /** @@ -249,8 +207,7 @@ static void __devinit init_hwif_atiixp(ide_hwif_t *hwif) hwif->atapi_dma = 1; hwif->ultra_mask = 0x3f; - hwif->mwdma_mask = 0x06; - hwif->swdma_mask = 0x04; + hwif->mwdma_mask = 0x07; pci_read_config_byte(pdev, ATIIXP_IDE_UDMA_MODE + ch, &udma_mode); |