Commit b2f951aa authored by Bartlomiej Zolnierkiewicz's avatar Bartlomiej Zolnierkiewicz
Browse files

ide: add ->read_sff_dma_status method



Add ->read_sff_dma_status method for reading DMA Status register
and use it instead of ->INB.

While at it:

* Use inb() directly in ns87415.c::ns87415_dma_end().

There should be no functional changes caused by this patch.
Signed-off-by: default avatarBartlomiej Zolnierkiewicz <bzolnier@gmail.com>
parent c97c6aca
......@@ -334,7 +334,7 @@ static int config_drive_for_dma (ide_drive_t *drive)
static int dma_timer_expiry (ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = hwif->INB(hwif->dma_status);
u8 dma_stat = hwif->read_sff_dma_status(hwif);
printk(KERN_WARNING "%s: dma_timer_expiry: dma status == 0x%02x\n",
drive->name, dma_stat);
......@@ -369,7 +369,7 @@ void ide_dma_host_set(ide_drive_t *drive, int on)
{
ide_hwif_t *hwif = HWIF(drive);
u8 unit = (drive->select.b.unit & 0x01);
u8 dma_stat = hwif->INB(hwif->dma_status);
u8 dma_stat = hwif->read_sff_dma_status(hwif);
if (on)
dma_stat |= (1 << (5 + unit));
......@@ -472,8 +472,8 @@ int ide_dma_setup(ide_drive_t *drive)
/* specify r/w */
hwif->OUTB(reading, hwif->dma_command);
/* read dma_status for INTR & ERROR flags */
dma_stat = hwif->INB(hwif->dma_status);
/* read DMA status for INTR & ERROR flags */
dma_stat = hwif->read_sff_dma_status(hwif);
/* clear INTR & ERROR flags */
hwif->OUTB(dma_stat|6, hwif->dma_status);
......@@ -520,7 +520,7 @@ int __ide_dma_end (ide_drive_t *drive)
/* stop DMA */
hwif->OUTB(dma_cmd&~1, hwif->dma_command);
/* get DMA status */
dma_stat = hwif->INB(hwif->dma_status);
dma_stat = hwif->read_sff_dma_status(hwif);
/* clear the INTR & ERROR bits */
hwif->OUTB(dma_stat|6, hwif->dma_status);
/* purge DMA mappings */
......@@ -537,7 +537,7 @@ EXPORT_SYMBOL(__ide_dma_end);
int ide_dma_test_irq(ide_drive_t *drive)
{
ide_hwif_t *hwif = HWIF(drive);
u8 dma_stat = hwif->INB(hwif->dma_status);
u8 dma_stat = hwif->read_sff_dma_status(hwif);
/* return 1 if INTR asserted */
if ((dma_stat & 4) == 4)
......
......@@ -103,6 +103,14 @@ void SELECT_MASK(ide_drive_t *drive, int mask)
port_ops->maskproc(drive, mask);
}
static u8 ide_read_sff_dma_status(ide_hwif_t *hwif)
{
if (hwif->host_flags & IDE_HFLAG_MMIO)
return readb((void __iomem *)hwif->dma_status);
else
return inb(hwif->dma_status);
}
static void ide_tf_load(ide_drive_t *drive, ide_task_t *task)
{
ide_hwif_t *hwif = drive->hwif;
......@@ -323,6 +331,8 @@ static void ata_output_data(ide_drive_t *drive, struct request *rq,
void default_hwif_transport(ide_hwif_t *hwif)
{
hwif->read_sff_dma_status = ide_read_sff_dma_status;
hwif->tf_load = ide_tf_load;
hwif->tf_read = ide_tf_read;
......
......@@ -63,6 +63,11 @@ static u8 superio_ide_inb (unsigned long port)
return inb(port);
}
static u8 superio_read_sff_dma_status(ide_hwif_t *hwif)
{
return superio_ide_inb(hwif->dma_status);
}
static void superio_tf_read(ide_drive_t *drive, ide_task_t *task)
{
struct ide_io_ports *io_ports = &drive->hwif->io_ports;
......@@ -122,6 +127,8 @@ static void __devinit superio_ide_init_iops (struct hwif_s *hwif)
tmp = superio_ide_inb(superio_ide_dma_status[port]);
outb(tmp | 0x66, superio_ide_dma_status[port]);
hwif->read_sff_dma_status = superio_read_sff_dma_status;
hwif->tf_read = superio_tf_read;
/* We need to override inb to workaround a SuperIO errata */
......@@ -200,13 +207,13 @@ static int ns87415_dma_end(ide_drive_t *drive)
u8 dma_stat = 0, dma_cmd = 0;
drive->waiting_for_dma = 0;
dma_stat = hwif->INB(hwif->dma_status);
dma_stat = hwif->read_sff_dma_status(hwif);
/* get dma command mode */
dma_cmd = hwif->INB(hwif->dma_command);
dma_cmd = inb(hwif->dma_command);
/* stop DMA */
outb(dma_cmd & ~1, hwif->dma_command);
/* from ERRATA: clear the INTR & ERROR bits */
dma_cmd = hwif->INB(hwif->dma_command);
dma_cmd = inb(hwif->dma_command);
outb(dma_cmd | 6, hwif->dma_command);
/* and free any DMA resources */
ide_destroy_dmatable(drive);
......
......@@ -126,6 +126,11 @@ static u8 scc_ide_inb(unsigned long port)
return (u8)data;
}
static u8 scc_read_sff_dma_status(ide_hwif_t *hwif)
{
return (u8)in_be32((void *)hwif->dma_status);
}
static void scc_ide_insw(unsigned long port, void *addr, u32 count)
{
u16 *ptr = (u16 *)addr;
......@@ -773,6 +778,8 @@ static void __devinit init_mmio_iops_scc(ide_hwif_t *hwif)
ide_set_hwifdata(hwif, ports);
hwif->read_sff_dma_status = scc_read_sff_dma_status;
hwif->tf_load = scc_tf_load;
hwif->tf_read = scc_tf_read;
......
......@@ -489,6 +489,8 @@ typedef struct hwif_s {
const struct ide_port_ops *port_ops;
const struct ide_dma_ops *dma_ops;
u8 (*read_sff_dma_status)(struct hwif_s *);
void (*tf_load)(ide_drive_t *, struct ide_task_s *);
void (*tf_read)(ide_drive_t *, struct ide_task_s *);
......
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