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alim15x3: add ali_fifo_control() helper

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Based on libata pata_ali host driver.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2010-01-18 07:17:50 +00:00 committed by David S. Miller
parent 3c8cc8df5a
commit 293f18ad72
1 changed files with 15 additions and 16 deletions
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31
drivers/ide/alim15x3.c
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@ -48,6 +48,19 @@ static u8 m5229_revision;
static u8 chip_is_1543c_e;
static struct pci_dev *isa_dev;
static void ali_fifo_control(ide_hwif_t *hwif, ide_drive_t *drive, int on)
{
struct pci_dev *pdev = to_pci_dev(hwif->dev);
int pio_fifo = 0x54 + hwif->channel;
u8 fifo;
int shift = 4 * (drive->dn & 1);
pci_read_config_byte(pdev, pio_fifo, &fifo);
fifo &= ~(0x0F << shift);
fifo |= (on << shift);
pci_write_config_byte(pdev, pio_fifo, fifo);
}
/**
* ali_set_pio_mode - set host controller for PIO mode
* @drive: drive
@ -64,8 +77,7 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
int bus_speed = ide_pci_clk ? ide_pci_clk : 33;
unsigned long T = 1000000 / bus_speed; /* PCI clock based */
int port = hwif->channel ? 0x5c : 0x58;
int portFIFO = hwif->channel ? 0x55 : 0x54;
u8 cd_dma_fifo = 0, unit = drive->dn & 1;
u8 unit = drive->dn & 1;
struct ide_timing t;
ide_timing_compute(drive, XFER_PIO_0 + pio, &t, T, 1);
@ -79,20 +91,7 @@ static void ali_set_pio_mode(ide_drive_t *drive, const u8 pio)
/*
* PIO mode => ATA FIFO on, ATAPI FIFO off
*/
pci_read_config_byte(dev, portFIFO, &cd_dma_fifo);
if (drive->media==ide_disk) {
if (unit) {
pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0x0F) | 0x50);
} else {
pci_write_config_byte(dev, portFIFO, (cd_dma_fifo & 0xF0) | 0x05);
}
} else {
if (unit) {
pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0x0F);
} else {
pci_write_config_byte(dev, portFIFO, cd_dma_fifo & 0xF0);
}
}
ali_fifo_control(hwif, drive, (drive->media == ide_disk) ? 0x05 : 0x00);
pci_write_config_byte(dev, port, t.setup);
pci_write_config_byte(dev, port + unit + 2,