ide: (hopefully) fix VDMA for CS5520

* Set the correct hwif->dma_base for the second channel in
  ide_get_or_set_dma_base().

* Remove DMA enable code from cs5520_set_pio_mode(), this can
  be handled by the generic ->dma_host_on method now.

* Add VDMA check to ide_config_drive_speed().

* drive->using_dma was never enabled since cs5520 host driver's
  ->ide_dma_on method overrided the generic ->ide_dma_on (so
  __ide_dma_on() was never called, drive->using_dma was never set
  and VDMA was never used since it depends on drive->using_dma).

  Fix it by using ->dma_host_on method instead of ->ide_dma_on
  (also add matching ->dma_host_off method).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

diff --git a/drivers/ide/ide-iops.c b/drivers/ide/ide-iops.c
index c97c071..e3e5e39 100644 (file)
--- a/drivers/ide/ide-iops.c
+++ b/drivers/ide/ide-iops.c
@@ -799,7 +799,7 @@ int ide_config_drive_speed(ide_drive_t *drive, u8 speed)
 
  skip:
 #ifdef CONFIG_BLK_DEV_IDEDMA
-       if (speed >= XFER_SW_DMA_0)
+       if (speed >= XFER_SW_DMA_0 || (hwif->host_flags & IDE_HFLAG_VDMA))
                hwif->dma_host_on(drive);
        else if (hwif->ide_dma_on)      /* check if host supports DMA */
                hwif->dma_off_quietly(drive);

diff --git a/drivers/ide/pci/cs5520.c b/drivers/ide/pci/cs5520.c
index d1a91bc..78058ca 100644 (file)
--- a/drivers/ide/pci/cs5520.c
+++ b/drivers/ide/pci/cs5520.c
@@ -71,7 +71,6 @@ static void cs5520_set_pio_mode(ide_drive_t *drive, const u8 pio)
        ide_hwif_t *hwif = HWIF(drive);
        struct pci_dev *pdev = hwif->pci_dev;
        int controller = drive->dn > 1 ? 1 : 0;
-       u8 reg;
 
        /* FIXME: if DMA = 1 do we need to set the DMA bit here ? */
 
@@ -91,11 +90,6 @@ static void cs5520_set_pio_mode(ide_drive_t *drive, const u8 pio)
        pci_write_config_byte(pdev, 0x66 + 4*controller + (drive->dn&1),
                (cs5520_pio_clocks[pio].recovery << 4) |
                (cs5520_pio_clocks[pio].assert));
-               
-       /* Set the DMA enable/disable flag */
-       reg = inb(hwif->dma_base + 0x02 + 8*controller);
-       reg |= 1<<((drive->dn&1)+5);
-       outb(reg, hwif->dma_base + 0x02 + 8*controller);
 }
 
 static void cs5520_set_dma_mode(ide_drive_t *drive, const u8 speed)
@@ -109,13 +103,23 @@ static void cs5520_set_dma_mode(ide_drive_t *drive, const u8 speed)
  *     We wrap the DMA activate to set the vdma flag. This is needed
  *     so that the IDE DMA layer issues PIO not DMA commands over the
  *     DMA channel
+ *
+ *     ATAPI is harder so disable it for now using IDE_HFLAG_NO_ATAPI_DMA
  */
- 
-static int cs5520_dma_on(ide_drive_t *drive)
+
+static void cs5520_dma_host_on(ide_drive_t *drive)
 {
-       /* ATAPI is harder so leave it for now */
-       drive->vdma = 1;
-       return 0;
+       if (drive->using_dma)
+               drive->vdma = 1;
+
+       ide_dma_host_on(drive);
+}
+
+static void cs5520_dma_host_off(ide_drive_t *drive)
+{
+       drive->vdma = 0;
+
+       ide_dma_host_off(drive);
 }
 
 static void __devinit init_hwif_cs5520(ide_hwif_t *hwif)
@@ -126,7 +130,8 @@ static void __devinit init_hwif_cs5520(ide_hwif_t *hwif)
        if (hwif->dma_base == 0)
                return;
 
-       hwif->ide_dma_on = &cs5520_dma_on;
+       hwif->dma_host_on  = &cs5520_dma_host_on;
+       hwif->dma_host_off = &cs5520_dma_host_off;
 }
 
 #define DECLARE_CS_DEV(name_str)                               \

diff --git a/drivers/ide/setup-pci.c b/drivers/ide/setup-pci.c
index d2cd5a3..bbfdf7e 100644 (file)
--- a/drivers/ide/setup-pci.c
+++ b/drivers/ide/setup-pci.c
@@ -165,13 +165,17 @@ static unsigned long ide_get_or_set_dma_base(const struct ide_port_info *d, ide_
 
                dma_base = pci_resource_start(dev, baridx);
 
-               if (dma_base == 0)
+               if (dma_base == 0) {
                        printk(KERN_ERR "%s: DMA base is invalid\n", d->name);
+                       return 0;
+               }
        }
 
-       if ((d->host_flags & IDE_HFLAG_CS5520) == 0 && dma_base) {
+       if (hwif->channel)
+               dma_base += 8;
+
+       if ((d->host_flags & IDE_HFLAG_CS5520) == 0) {
                u8 simplex_stat = 0;
-               dma_base += hwif->channel ? 8 : 0;
 
                switch(dev->device) {
                        case PCI_DEVICE_ID_AL_M5219: