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it8213: PIO fixes (take 2) 

* Rename it8213_tuneproc() to it8213_tune_pio() and add it8213_tuneproc()
  wrapper.  Move finding of the best PIO mode to the new wrapper.

* Add setting of transfer mode on the device to it8213_tuneproc().

* Don't call it8213_dma_2_pio() for PIO modes in it8213_tune_chipset().

* Use it8213_tuneproc() in it8213_config_drive_for_dma().

v2:
* Remove PIO modes from it8213_dma_2_pio(), they are no longer needed there
  (Noticed by Sergei)

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2007-08-01 23:46:46 +02:00
parent bc0b0b5c4b
commit 68aaf81503
1 changed files with 17 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

33
drivers/ide/pci/it8213.c
View File

@ -21,7 +21,7 @@
* it8213_dma_2_pio - return the PIO mode matching DMA
* @xfer_rate: transfer speed
*
* Returns the nearest equivalent PIO timing for the PIO or DMA
* Returns the nearest equivalent PIO timing for the DMA
* mode requested by the controller.
*/
@ -35,34 +35,28 @@ static u8 it8213_dma_2_pio (u8 xfer_rate) {
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;
}
}
/*
* it8213_tuneproc - tune a drive
* it8213_tune_pio - tune a drive
* @drive: drive to tune
* @pio: desired PIO mode
*
* Set the interface PIO mode.
*/
static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
static void it8213_tune_pio(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct pci_dev *dev = hwif->pci_dev;
@ -82,8 +76,6 @@ static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
{ 2, 1 },
{ 2, 3 }, };
pio = ide_get_best_pio_mode(drive, pio, 4);
spin_lock_irqsave(&tune_lock, flags);
pci_read_config_word(dev, master_port, &master_data);
@ -113,6 +105,13 @@ static void it8213_tuneproc (ide_drive_t *drive, u8 pio)
spin_unlock_irqrestore(&tune_lock, flags);
}
static void it8213_tuneproc(ide_drive_t *drive, u8 pio)
{
pio = ide_get_best_pio_mode(drive, pio, 4);
it8213_tune_pio(drive, pio);
ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
/**
* it8213_tune_chipset - set controller timings
* @drive: Drive to set up
@ -193,7 +192,12 @@ static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
if (reg55 & w_flag)
pci_write_config_byte(dev, 0x55, (u8) reg55 & ~w_flag);
}
it8213_tuneproc(drive, it8213_dma_2_pio(speed));
if (speed > XFER_PIO_4)
it8213_tune_pio(drive, it8213_dma_2_pio(speed));
else
it8213_tune_pio(drive, speed - XFER_PIO_0);
return ide_config_drive_speed(drive, speed);
}
@ -209,13 +213,10 @@ static int it8213_tune_chipset (ide_drive_t *drive, u8 xferspeed)
static int it8213_config_drive_for_dma (ide_drive_t *drive)
{
u8 pio;
if (ide_tune_dma(drive))
return 0;
pio = ide_get_best_pio_mode(drive, 255, 4);
it8213_tune_chipset(drive, XFER_PIO_0 + pio);
it8213_tuneproc(drive, 255);
return -1;
}