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Subject[PATCH 07/11] ide: use ATA_DMA_* defines in ide-dma-sff.c
From: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Subject: [PATCH] ide: use ATA_DMA_* defines in ide-dma-sff.c

In few places open-coded values were still being used. Fix it.

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
---
drivers/ide/ide-dma-sff.c | 52 ++++++++++++++++++++--------------------------
1 file changed, 23 insertions(+), 29 deletions(-)

Index: b/drivers/ide/ide-dma-sff.c
===================================================================
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -176,15 +176,10 @@ int ide_dma_setup(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
struct request *rq = hwif->hwgroup->rq;
- unsigned int reading;
+ unsigned int reading = rq_data_dir(rq) ? 0 : ATA_DMA_WR;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
u8 dma_stat;

- if (rq_data_dir(rq))
- reading = 0;
- else
- reading = 1 << 3;
-
/* fall back to pio! */
if (!ide_build_dmatable(drive, rq)) {
ide_map_sg(drive, rq);
@@ -209,10 +204,11 @@ int ide_dma_setup(ide_drive_t *drive)

/* clear INTR & ERROR flags */
if (mmio)
- writeb(dma_stat | 6,
+ writeb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
(void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
else
- outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+ outb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
+ hwif->dma_base + ATA_DMA_STATUS);

drive->waiting_for_dma = 1;
return 0;
@@ -246,14 +242,13 @@ static int dma_timer_expiry(ide_drive_t

hwif->hwgroup->expiry = NULL; /* one free ride for now */

- /* 1 dmaing, 2 error, 4 intr */
- if (dma_stat & 2) /* ERROR */
+ if (dma_stat & ATA_DMA_ERR) /* ERROR */
return -1;

- if (dma_stat & 1) /* DMAing */
+ if (dma_stat & ATA_DMA_ACTIVE) /* DMAing */
return WAIT_CMD;

- if (dma_stat & 4) /* Got an Interrupt */
+ if (dma_stat & ATA_DMA_INTR) /* Got an Interrupt */
return WAIT_CMD;

return 0; /* Status is unknown -- reset the bus */
@@ -279,12 +274,11 @@ void ide_dma_start(ide_drive_t *drive)
*/
if (hwif->host_flags & IDE_HFLAG_MMIO) {
dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
- /* start DMA */
- writeb(dma_cmd | 1,
+ writeb(dma_cmd | ATA_DMA_START,
(void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
} else {
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
- outb(dma_cmd | 1, hwif->dma_base + ATA_DMA_CMD);
+ outb(dma_cmd | ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
}

wmb();
@@ -296,19 +290,18 @@ int ide_dma_end(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
u8 mmio = (hwif->host_flags & IDE_HFLAG_MMIO) ? 1 : 0;
- u8 dma_stat = 0, dma_cmd = 0;
+ u8 dma_stat = 0, dma_cmd = 0, mask;

drive->waiting_for_dma = 0;

+ /* stop DMA */
if (mmio) {
- /* get DMA command mode */
dma_cmd = readb((void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
- /* stop DMA */
- writeb(dma_cmd & ~1,
+ writeb(dma_cmd & ~ATA_DMA_START,
(void __iomem *)(hwif->dma_base + ATA_DMA_CMD));
} else {
dma_cmd = inb(hwif->dma_base + ATA_DMA_CMD);
- outb(dma_cmd & ~1, hwif->dma_base + ATA_DMA_CMD);
+ outb(dma_cmd & ~ATA_DMA_START, hwif->dma_base + ATA_DMA_CMD);
}

/* get DMA status */
@@ -316,16 +309,21 @@ int ide_dma_end(ide_drive_t *drive)

if (mmio)
/* clear the INTR & ERROR bits */
- writeb(dma_stat | 6,
+ writeb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
(void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
else
- outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+ outb(dma_stat | ATA_DMA_ERR | ATA_DMA_INTR,
+ hwif->dma_base + ATA_DMA_STATUS);

/* purge DMA mappings */
ide_destroy_dmatable(drive);
- /* verify good DMA status */
wmb();
- return (dma_stat & 7) != 4 ? (0x10 | dma_stat) : 0;
+
+ /* verify good DMA status */
+ mask = ATA_DMA_ACTIVE | ATA_DMA_ERR | ATA_DMA_INTR;
+ if ((dma_stat & mask) != ATA_DMA_INTR)
+ return 0x10 | dma_stat;
+ return 0;
}
EXPORT_SYMBOL_GPL(ide_dma_end);

@@ -335,11 +333,7 @@ int ide_dma_test_irq(ide_drive_t *drive)
ide_hwif_t *hwif = drive->hwif;
u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);

- /* return 1 if INTR asserted */
- if ((dma_stat & 4) == 4)
- return 1;
-
- return 0;
+ return (dma_stat & ATA_DMA_INTR) ? 1 : 0;
}
EXPORT_SYMBOL_GPL(ide_dma_test_irq);


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