Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-23 19:31:53 +00:00
Code Issues Packages Projects Releases Wiki Activity

scc_pata: add ->dma_host_set and ->dma_start methods

Browse Source 
Add ->dma_host_set and ->dma_start methods (+ __scc_dma_end() helper)
so scc_ide_{in,out}b() can be used directly.

There should be no functional changes caused by this patch.

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2008-04-28 23:44:41 +02:00
parent 22cdd6cedc
commit 669185e98c
1 changed files with 50 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
drivers/ide/pci/scc_pata.c
View File

@ -260,6 +260,20 @@ static void scc_set_dma_mode(ide_drive_t *drive, const u8 speed)
out_be32((void __iomem *)udenvt_port, reg);
}
static void scc_dma_host_set(ide_drive_t *drive, int on)
{
ide_hwif_t *hwif = drive->hwif;
u8 unit = (drive->select.b.unit & 0x01);
u8 dma_stat = scc_ide_inb(hwif->dma_status);
if (on)
dma_stat |= (1 << (5 + unit));
else
dma_stat &= ~(1 << (5 + unit));
scc_ide_outb(dma_stat, hwif->dma_status);
}
/**
* scc_ide_dma_setup - begin a DMA phase
* @drive: target device
@ -304,13 +318,45 @@ static int scc_dma_setup(ide_drive_t *drive)
return 0;
}
static void scc_dma_start(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 dma_cmd = scc_ide_inb(hwif->dma_command);
/* start DMA */
scc_ide_outb(dma_cmd | 1, hwif->dma_command);
hwif->dma = 1;
wmb();
}
static int __scc_dma_end(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 dma_stat, dma_cmd;
drive->waiting_for_dma = 0;
/* get DMA command mode */
dma_cmd = scc_ide_inb(hwif->dma_command);
/* stop DMA */
scc_ide_outb(dma_cmd & ~1, hwif->dma_command);
/* get DMA status */
dma_stat = scc_ide_inb(hwif->dma_status);
/* clear the INTR & ERROR bits */
scc_ide_outb(dma_stat | 6, hwif->dma_status);
/* purge DMA mappings */
ide_destroy_dmatable(drive);
/* verify good DMA status */
hwif->dma = 0;
wmb();
return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
}
/**
* scc_dma_end - Stop DMA
* @drive: IDE drive
*
* Check and clear INT Status register.
* Then call __ide_dma_end().
* Then call __scc_dma_end().
*/
static int scc_dma_end(ide_drive_t *drive)
@ -414,7 +460,7 @@ static int scc_dma_end(ide_drive_t *drive)
break;
}
dma_stat = __ide_dma_end(drive);
dma_stat = __scc_dma_end(drive);
if (data_loss)
dma_stat |= 2; /* emulate DMA error (to retry command) */
return dma_stat;
@ -811,10 +857,10 @@ static const struct ide_port_ops scc_port_ops = {
};
static const struct ide_dma_ops scc_dma_ops = {
.dma_host_set = ide_dma_host_set,
.dma_host_set = scc_dma_host_set,
.dma_setup = scc_dma_setup,
.dma_exec_cmd = ide_dma_exec_cmd,
.dma_start = ide_dma_start,
.dma_start = scc_dma_start,
.dma_end = scc_dma_end,
.dma_test_irq = scc_dma_test_irq,
.dma_lost_irq = ide_dma_lost_irq,