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Subject[PATCH 01/18] 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: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-dma.c | 12 ++++++------
drivers/ide/ide-iops.c | 10 ++++++++++
drivers/ide/pci/ns87415.c | 13 ++++++++++---
drivers/ide/pci/scc_pata.c | 7 +++++++
include/linux/ide.h | 2 ++
5 files changed, 35 insertions(+), 9 deletions(-)

Index: b/drivers/ide/ide-dma.c
===================================================================
--- a/drivers/ide/ide-dma.c
+++ b/drivers/ide/ide-dma.c
@@ -334,7 +334,7 @@ static int config_drive_for_dma (ide_dri
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
{
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)
Index: b/drivers/ide/ide-iops.c
===================================================================
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -103,6 +103,14 @@ void SELECT_MASK(ide_drive_t *drive, int
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

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;

Index: b/drivers/ide/pci/ns87415.c
===================================================================
--- a/drivers/ide/pci/ns87415.c
+++ b/drivers/ide/pci/ns87415.c
@@ -63,6 +63,11 @@ static u8 superio_ide_inb (unsigned long
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_i
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 *
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);
Index: b/drivers/ide/pci/scc_pata.c
===================================================================
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -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;
@@ -774,6 +779,8 @@ static void __devinit init_mmio_iops_scc

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;

Index: b/include/linux/ide.h
===================================================================
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -468,6 +468,8 @@ 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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