ide: add struct ide_dma_ops (take 3)

Add struct ide_dma_ops and convert core code + drivers to use it.

While at it:

* Drop "ide_" prefix from ->ide_dma_end and ->ide_dma_test_irq methods.

* Drop "ide_" "infixes" from DMA methods.

* au1xxx-ide.c:
  - use auide_dma_{test_irq,end}() directly in auide_dma_timeout()

* pdc202xx_old.c:
  - drop "old_" "infixes" from DMA methods

* siimage.c:
  - add siimage_dma_test_irq() helper
  - print SATA warning in siimage_init_one()

* Remove no longer needed ->init_hwif implementations.

v2:
* Changes based on review from Sergei:
  - s/siimage_ide_dma_test_irq/siimage_dma_test_irq/
  - s/drive->hwif/hwif/ in idefloppy_pc_intr().
  - fix patch description w.r.t. au1xxx-ide changes
  - fix au1xxx-ide build
  - fix naming for cmd64*_dma_ops
  - drop "ide_" and "old_" infixes
  - s/hpt3xxx_dma_ops/hpt37x_dma_ops/
  - s/hpt370x_dma_ops/hpt370_dma_ops/
  - use correct DMA ops for HPT302/N, HPT371/N and HPT374
  - s/it821x_smart_dma_ops/it821x_pass_through_dma_ops/

v3:
* Two bugs slipped in v2 (noticed by Sergei):
  - use correct DMA ops for HPT374 (for real this time)
  - handle HPT370/HPT370A properly

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

1 files changed, 52 insertions, 58 deletions

diff --git a/drivers/ide/pci/cmd64x.c b/drivers/ide/pci/cmd64x.c
index 5411ded791bb..5fd252e6ed08 100644
--- a/drivers/ide/pci/cmd64x.c
+++ b/drivers/ide/pci/cmd64x.c
@@ -223,7 +223,7 @@ static void cmd64x_set_dma_mode(ide_drive_t *drive, const u8 speed)
                 (void) pci_write_config_byte(dev, pciU, regU);
 }
 
-static int cmd648_ide_dma_end (ide_drive_t *drive)
+static int cmd648_dma_end(ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         unsigned long base      = hwif->dma_base - (hwif->channel * 8);
@@ -239,7 +239,7 @@ static int cmd648_ide_dma_end (ide_drive_t *drive)
         return err;
 }
 
-static int cmd64x_ide_dma_end (ide_drive_t *drive)
+static int cmd64x_dma_end(ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
@@ -256,7 +256,7 @@ static int cmd64x_ide_dma_end (ide_drive_t *drive)
         return err;
 }
 
-static int cmd648_ide_dma_test_irq (ide_drive_t *drive)
+static int cmd648_dma_test_irq(ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         unsigned long base      = hwif->dma_base - (hwif->channel * 8);
@@ -279,7 +279,7 @@ static int cmd648_ide_dma_test_irq (ide_drive_t *drive)
         return 0;
 }
 
-static int cmd64x_ide_dma_test_irq (ide_drive_t *drive)
+static int cmd64x_dma_test_irq(ide_drive_t *drive)
 {
         ide_hwif_t *hwif        = HWIF(drive);
         struct pci_dev *dev     = to_pci_dev(hwif->dev);
@@ -310,7 +310,7 @@ static int cmd64x_ide_dma_test_irq (ide_drive_t *drive)
  * event order for DMA transfers.
  */
 
-static int cmd646_1_ide_dma_end (ide_drive_t *drive)
+static int cmd646_1_dma_end(ide_drive_t *drive)
 {
         ide_hwif_t *hwif = HWIF(drive);
         u8 dma_stat = 0, dma_cmd = 0;
@@ -385,62 +385,33 @@ static u8 __devinit cmd64x_cable_detect(ide_hwif_t *hwif)
         }
 }
 
-static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
-{
-        struct pci_dev *dev = to_pci_dev(hwif->dev);
-
-        if (!hwif->dma_base)
-                return;
-
-        /*
-         * UltraDMA only supported on PCI646U and PCI646U2, which
-         * correspond to revisions 0x03, 0x05 and 0x07 respectively.
-         * Actually, although the CMD tech support people won't
-         * tell me the details, the 0x03 revision cannot support
-         * UDMA correctly without hardware modifications, and even
-         * then it only works with Quantum disks due to some
-         * hold time assumptions in the 646U part which are fixed
-         * in the 646U2.
-         *
-         * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
-         */
-        if (dev->device == PCI_DEVICE_ID_CMD_646 && dev->revision < 5)
-                hwif->ultra_mask = 0x00;
-
-        switch (dev->device) {
-        case PCI_DEVICE_ID_CMD_648:
-        case PCI_DEVICE_ID_CMD_649:
-        alt_irq_bits:
-                hwif->ide_dma_end       = &cmd648_ide_dma_end;
-                hwif->ide_dma_test_irq  = &cmd648_ide_dma_test_irq;
-                break;
-        case PCI_DEVICE_ID_CMD_646:
-                if (dev->revision == 0x01) {
-                        hwif->ide_dma_end = &cmd646_1_ide_dma_end;
-                        break;
-                } else if (dev->revision >= 0x03)
-                        goto alt_irq_bits;
-                /* fall thru */
-        default:
-                hwif->ide_dma_end       = &cmd64x_ide_dma_end;
-                hwif->ide_dma_test_irq  = &cmd64x_ide_dma_test_irq;
-                break;
-        }
-}
-
 static const struct ide_port_ops cmd64x_port_ops = {
         .set_pio_mode           = cmd64x_set_pio_mode,
         .set_dma_mode           = cmd64x_set_dma_mode,
         .cable_detect           = cmd64x_cable_detect,
 };
 
+static struct ide_dma_ops cmd64x_dma_ops = {
+        .dma_end                = cmd64x_dma_end,
+        .dma_test_irq           = cmd64x_dma_test_irq,
+};
+
+static struct ide_dma_ops cmd646_rev1_dma_ops = {
+        .dma_end                = cmd646_1_dma_end,
+};
+
+static struct ide_dma_ops cmd648_dma_ops = {
+        .dma_end                = cmd648_dma_end,
+        .dma_test_irq           = cmd648_dma_test_irq,
+};
+
 static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
         {       /* 0 */
                 .name           = "CMD643",
                 .init_chipset   = init_chipset_cmd64x,
-                .init_hwif      = init_hwif_cmd64x,
                 .enablebits     = {{0x00,0x00,0x00}, {0x51,0x08,0x08}},
                 .port_ops       = &cmd64x_port_ops,
+                .dma_ops        = &cmd64x_dma_ops,
                 .host_flags     = IDE_HFLAG_CLEAR_SIMPLEX |
                                   IDE_HFLAG_ABUSE_PREFETCH,
                 .pio_mask       = ATA_PIO5,
@@ -449,10 +420,10 @@ static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
         },{     /* 1 */
                 .name           = "CMD646",
                 .init_chipset   = init_chipset_cmd64x,
-                .init_hwif      = init_hwif_cmd64x,
                 .enablebits     = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
                 .chipset        = ide_cmd646,
                 .port_ops       = &cmd64x_port_ops,
+                .dma_ops        = &cmd648_dma_ops,
                 .host_flags     = IDE_HFLAG_ABUSE_PREFETCH,
                 .pio_mask       = ATA_PIO5,
                 .mwdma_mask     = ATA_MWDMA2,
@@ -460,9 +431,9 @@ static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
         },{     /* 2 */
                 .name           = "CMD648",
                 .init_chipset   = init_chipset_cmd64x,
-                .init_hwif      = init_hwif_cmd64x,
                 .enablebits     = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
                 .port_ops       = &cmd64x_port_ops,
+                .dma_ops        = &cmd648_dma_ops,
                 .host_flags     = IDE_HFLAG_ABUSE_PREFETCH,
                 .pio_mask       = ATA_PIO5,
                 .mwdma_mask     = ATA_MWDMA2,
@@ -470,9 +441,9 @@ static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
         },{     /* 3 */
                 .name           = "CMD649",
                 .init_chipset   = init_chipset_cmd64x,
-                .init_hwif      = init_hwif_cmd64x,
                 .enablebits     = {{0x51,0x04,0x04}, {0x51,0x08,0x08}},
                 .port_ops       = &cmd64x_port_ops,
+                .dma_ops        = &cmd648_dma_ops,
                 .host_flags     = IDE_HFLAG_ABUSE_PREFETCH,
                 .pio_mask       = ATA_PIO5,
                 .mwdma_mask     = ATA_MWDMA2,
@@ -487,12 +458,35 @@ static int __devinit cmd64x_init_one(struct pci_dev *dev, const struct pci_devic
 
         d = cmd64x_chipsets[idx];
 
-        /*
-         * The original PCI0646 didn't have the primary channel enable bit,
-         * it appeared starting with PCI0646U (i.e. revision ID 3).
-         */
-        if (idx == 1 && dev->revision < 3)
-                d.enablebits[0].reg = 0;
+        if (idx == 1) {
+                /*
+                 * UltraDMA only supported on PCI646U and PCI646U2, which
+                 * correspond to revisions 0x03, 0x05 and 0x07 respectively.
+                 * Actually, although the CMD tech support people won't
+                 * tell me the details, the 0x03 revision cannot support
+                 * UDMA correctly without hardware modifications, and even
+                 * then it only works with Quantum disks due to some
+                 * hold time assumptions in the 646U part which are fixed
+                 * in the 646U2.
+                 *
+                 * So we only do UltraDMA on revision 0x05 and 0x07 chipsets.
+                 */
+                if (dev->revision < 5) {
+                        d.udma_mask = 0x00;
+                        /*
+                         * The original PCI0646 didn't have the primary
+                         * channel enable bit, it appeared starting with
+                         * PCI0646U (i.e. revision ID 3).
+                         */
+                        if (dev->revision < 3) {
+                                d.enablebits[0].reg = 0;
+                                if (dev->revision == 1)
+                                        d.dma_ops = &cmd646_rev1_dma_ops;
+                                else
+                                        d.dma_ops = &cmd64x_dma_ops;
+                        }
+                }
+        }
 
         return ide_setup_pci_device(dev, &d);
 }