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path: root/drivers/ide/ide-dma-sff.c
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Diffstat (limited to 'drivers/ide/ide-dma-sff.c')
-rw-r--r--drivers/ide/ide-dma-sff.c105
1 files changed, 53 insertions, 52 deletions
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index cac431f0df1..123d393658a 100644
--- a/drivers/ide/ide-dma-sff.c
+++ b/drivers/ide/ide-dma-sff.c
@@ -50,6 +50,27 @@ int config_drive_for_dma(ide_drive_t *drive)
return 0;
}
+u8 ide_dma_sff_read_status(ide_hwif_t *hwif)
+{
+ unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ return readb((void __iomem *)addr);
+ else
+ return inb(addr);
+}
+EXPORT_SYMBOL_GPL(ide_dma_sff_read_status);
+
+static void ide_dma_sff_write_status(ide_hwif_t *hwif, u8 val)
+{
+ unsigned long addr = hwif->dma_base + ATA_DMA_STATUS;
+
+ if (hwif->host_flags & IDE_HFLAG_MMIO)
+ writeb(val, (void __iomem *)addr);
+ else
+ outb(val, addr);
+}
+
/**
* ide_dma_host_set - Enable/disable DMA on a host
* @drive: drive to control
@@ -62,18 +83,14 @@ void ide_dma_host_set(ide_drive_t *drive, int on)
{
ide_hwif_t *hwif = drive->hwif;
u8 unit = drive->dn & 1;
- u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
if (on)
dma_stat |= (1 << (5 + unit));
else
dma_stat &= ~(1 << (5 + unit));
- if (hwif->host_flags & IDE_HFLAG_MMIO)
- writeb(dma_stat,
- (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
- else
- outb(dma_stat, hwif->dma_base + ATA_DMA_STATUS);
+ ide_dma_sff_write_status(hwif, dma_stat);
}
EXPORT_SYMBOL_GPL(ide_dma_host_set);
@@ -98,10 +115,10 @@ int ide_build_dmatable(ide_drive_t *drive, struct request *rq)
{
ide_hwif_t *hwif = drive->hwif;
__le32 *table = (__le32 *)hwif->dmatable_cpu;
- unsigned int is_trm290 = (hwif->chipset == ide_trm290) ? 1 : 0;
unsigned int count = 0;
int i;
struct scatterlist *sg;
+ u8 is_trm290 = !!(hwif->host_flags & IDE_HFLAG_TRM290);
hwif->sg_nents = ide_build_sglist(drive, rq);
if (hwif->sg_nents == 0)
@@ -175,16 +192,11 @@ EXPORT_SYMBOL_GPL(ide_build_dmatable);
int ide_dma_setup(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- struct request *rq = hwif->hwgroup->rq;
- unsigned int reading;
+ struct request *rq = hwif->rq;
+ 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);
@@ -192,7 +204,7 @@ int ide_dma_setup(ide_drive_t *drive)
}
/* PRD table */
- if (hwif->host_flags & IDE_HFLAG_MMIO)
+ if (mmio)
writel(hwif->dmatable_dma,
(void __iomem *)(hwif->dma_base + ATA_DMA_TABLE_OFS));
else
@@ -205,14 +217,10 @@ int ide_dma_setup(ide_drive_t *drive)
outb(reading, hwif->dma_base + ATA_DMA_CMD);
/* read DMA status for INTR & ERROR flags */
- dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
/* clear INTR & ERROR flags */
- if (mmio)
- writeb(dma_stat | 6,
- (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
- else
- outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+ ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
drive->waiting_for_dma = 1;
return 0;
@@ -236,7 +244,7 @@ EXPORT_SYMBOL_GPL(ide_dma_setup);
static int dma_timer_expiry(ide_drive_t *drive)
{
ide_hwif_t *hwif = drive->hwif;
- u8 dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ u8 dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
printk(KERN_WARNING "%s: %s: DMA status (0x%02x)\n",
drive->name, __func__, dma_stat);
@@ -244,16 +252,15 @@ static int dma_timer_expiry(ide_drive_t *drive)
if ((dma_stat & 0x18) == 0x18) /* BUSY Stupid Early Timer !! */
return WAIT_CMD;
- hwif->hwgroup->expiry = NULL; /* one free ride for now */
+ hwif->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 +286,11 @@ 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();
@@ -295,37 +301,35 @@ EXPORT_SYMBOL_GPL(ide_dma_start);
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;
- if (mmio) {
- /* get DMA command mode */
+ /* stop DMA */
+ if (hwif->host_flags & IDE_HFLAG_MMIO) {
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 */
- dma_stat = hwif->tp_ops->read_sff_dma_status(hwif);
+ dma_stat = hwif->dma_ops->dma_sff_read_status(hwif);
- if (mmio)
- /* clear the INTR & ERROR bits */
- writeb(dma_stat | 6,
- (void __iomem *)(hwif->dma_base + ATA_DMA_STATUS));
- else
- outb(dma_stat | 6, hwif->dma_base + ATA_DMA_STATUS);
+ /* clear INTR & ERROR bits */
+ ide_dma_sff_write_status(hwif, dma_stat | ATA_DMA_ERR | ATA_DMA_INTR);
/* 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);
@@ -333,13 +337,9 @@ EXPORT_SYMBOL_GPL(ide_dma_end);
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);
+ u8 dma_stat = hwif->dma_ops->dma_sff_read_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);
@@ -352,5 +352,6 @@ const struct ide_dma_ops sff_dma_ops = {
.dma_test_irq = ide_dma_test_irq,
.dma_timeout = ide_dma_timeout,
.dma_lost_irq = ide_dma_lost_irq,
+ .dma_sff_read_status = ide_dma_sff_read_status,
};
EXPORT_SYMBOL_GPL(sff_dma_ops);
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-16 04:13:52 +0000