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rtc: tw4030 add alarm/update interfaces
[deliverable/linux.git] / drivers / ide / ide-dma-sff.c
diff --git a/drivers/ide/ide-dma-sff.c b/drivers/ide/ide-dma-sff.c
index cac431f0df1769eda7e4f2d7fe28d7f8914602db..123d393658afac004bc541532ca02193b6478ee4 100644 (file)
--- 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);
Linux kernel - Deliverables
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