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path: root/drivers/ide/pci/scc_pata.c
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Diffstat (limited to 'drivers/ide/pci/scc_pata.c')
-rw-r--r--drivers/ide/pci/scc_pata.c141
1 files changed, 81 insertions, 60 deletions
diff --git a/drivers/ide/pci/scc_pata.c b/drivers/ide/pci/scc_pata.c
index 55bc0a32e34f..eeb0a6d434aa 100644
--- a/drivers/ide/pci/scc_pata.c
+++ b/drivers/ide/pci/scc_pata.c
@@ -165,9 +165,9 @@ scc_ide_outbsync(ide_drive_t * drive, u8 addr, unsigned long port)
ide_hwif_t *hwif = HWIF(drive);
out_be32((void*)port, addr);
- __asm__ __volatile__("eieio":::"memory");
+ eieio();
in_be32((void*)(hwif->dma_base + 0x01c));
- __asm__ __volatile__("eieio":::"memory");
+ eieio();
}
static void
@@ -190,7 +190,7 @@ scc_ide_outsl(unsigned long port, void *addr, u32 count)
}
/**
- * scc_tuneproc - tune a drive PIO mode
+ * scc_tune_pio - tune a drive PIO mode
* @drive: drive to tune
* @mode_wanted: the target operating mode
*
@@ -198,7 +198,7 @@ scc_ide_outsl(unsigned long port, void *addr, u32 count)
* controller.
*/
-static void scc_tuneproc(ide_drive_t *drive, byte mode_wanted)
+static void scc_tune_pio(ide_drive_t *drive, const u8 pio)
{
ide_hwif_t *hwif = HWIF(drive);
struct scc_ports *ports = ide_get_hwifdata(hwif);
@@ -207,41 +207,25 @@ static void scc_tuneproc(ide_drive_t *drive, byte mode_wanted)
unsigned long piosht_port = ctl_base + 0x000;
unsigned long pioct_port = ctl_base + 0x004;
unsigned long reg;
- unsigned char speed = XFER_PIO_0;
int offset;
- mode_wanted = ide_get_best_pio_mode(drive, mode_wanted, 4, NULL);
- switch (mode_wanted) {
- case 4:
- speed = XFER_PIO_4;
- break;
- case 3:
- speed = XFER_PIO_3;
- break;
- case 2:
- speed = XFER_PIO_2;
- break;
- case 1:
- speed = XFER_PIO_1;
- break;
- case 0:
- default:
- speed = XFER_PIO_0;
- break;
- }
-
reg = in_be32((void __iomem *)cckctrl_port);
if (reg & CCKCTRL_ATACLKOEN) {
offset = 1; /* 133MHz */
} else {
offset = 0; /* 100MHz */
}
- reg = JCHSTtbl[offset][mode_wanted] << 16 | JCHHTtbl[offset][mode_wanted];
+ reg = JCHSTtbl[offset][pio] << 16 | JCHHTtbl[offset][pio];
out_be32((void __iomem *)piosht_port, reg);
- reg = JCHCTtbl[offset][mode_wanted];
+ reg = JCHCTtbl[offset][pio];
out_be32((void __iomem *)pioct_port, reg);
+}
- ide_config_drive_speed(drive, speed);
+static void scc_tuneproc(ide_drive_t *drive, u8 pio)
+{
+ pio = ide_get_best_pio_mode(drive, pio, 4);
+ scc_tune_pio(drive, pio);
+ ide_config_drive_speed(drive, XFER_PIO_0 + pio);
}
/**
@@ -280,26 +264,21 @@ static int scc_tune_chipset(ide_drive_t *drive, byte xferspeed)
switch (speed) {
case XFER_UDMA_6:
- idx = 6;
- break;
case XFER_UDMA_5:
- idx = 5;
- break;
case XFER_UDMA_4:
- idx = 4;
- break;
case XFER_UDMA_3:
- idx = 3;
- break;
case XFER_UDMA_2:
- idx = 2;
- break;
case XFER_UDMA_1:
- idx = 1;
- break;
case XFER_UDMA_0:
- idx = 0;
+ idx = speed - XFER_UDMA_0;
break;
+ case XFER_PIO_4:
+ case XFER_PIO_3:
+ case XFER_PIO_2:
+ case XFER_PIO_1:
+ case XFER_PIO_0:
+ scc_tune_pio(drive, speed - XFER_PIO_0);
+ return ide_config_drive_speed(drive, speed);
default:
return 1;
}
@@ -329,7 +308,7 @@ static int scc_tune_chipset(ide_drive_t *drive, byte xferspeed)
* required.
* If the drive isn't suitable for DMA or we hit other problems
* then we will drop down to PIO and set up PIO appropriately.
- * (return 1)
+ * (return -1)
*/
static int scc_config_drive_for_dma(ide_drive_t *drive)
@@ -338,7 +317,7 @@ static int scc_config_drive_for_dma(ide_drive_t *drive)
return 0;
if (ide_use_fast_pio(drive))
- scc_tuneproc(drive, 4);
+ scc_tuneproc(drive, 255);
return -1;
}
@@ -401,6 +380,33 @@ static int scc_ide_dma_end(ide_drive_t * drive)
ide_hwif_t *hwif = HWIF(drive);
unsigned long intsts_port = hwif->dma_base + 0x014;
u32 reg;
+ int dma_stat, data_loss = 0;
+ static int retry = 0;
+
+ /* errata A308 workaround: Step5 (check data loss) */
+ /* We don't check non ide_disk because it is limited to UDMA4 */
+ if (!(in_be32((void __iomem *)IDE_ALTSTATUS_REG) & ERR_STAT) &&
+ drive->media == ide_disk && drive->current_speed > XFER_UDMA_4) {
+ reg = in_be32((void __iomem *)intsts_port);
+ if (!(reg & INTSTS_ACTEINT)) {
+ printk(KERN_WARNING "%s: operation failed (transfer data loss)\n",
+ drive->name);
+ data_loss = 1;
+ if (retry++) {
+ struct request *rq = HWGROUP(drive)->rq;
+ int unit;
+ /* ERROR_RESET and drive->crc_count are needed
+ * to reduce DMA transfer mode in retry process.
+ */
+ if (rq)
+ rq->errors |= ERROR_RESET;
+ for (unit = 0; unit < MAX_DRIVES; unit++) {
+ ide_drive_t *drive = &hwif->drives[unit];
+ drive->crc_count++;
+ }
+ }
+ }
+ }
while (1) {
reg = in_be32((void __iomem *)intsts_port);
@@ -469,27 +475,25 @@ static int scc_ide_dma_end(ide_drive_t * drive)
break;
}
- return __ide_dma_end(drive);
+ dma_stat = __ide_dma_end(drive);
+ if (data_loss)
+ dma_stat |= 2; /* emulate DMA error (to retry command) */
+ return dma_stat;
}
/* returns 1 if dma irq issued, 0 otherwise */
static int scc_dma_test_irq(ide_drive_t *drive)
{
- ide_hwif_t *hwif = HWIF(drive);
- u8 dma_stat = hwif->INB(hwif->dma_status);
+ ide_hwif_t *hwif = HWIF(drive);
+ u32 int_stat = in_be32((void __iomem *)hwif->dma_base + 0x014);
- /* return 1 if INTR asserted */
- if ((dma_stat & 4) == 4)
+ /* SCC errata A252,A308 workaround: Step4 */
+ if ((in_be32((void __iomem *)IDE_ALTSTATUS_REG) & ERR_STAT) &&
+ (int_stat & INTSTS_INTRQ))
return 1;
- /* Workaround for PTERADD: emulate DMA_INTR when
- * - IDE_STATUS[ERR] = 1
- * - INT_STATUS[INTRQ] = 1
- * - DMA_STATUS[IORACTA] = 1
- */
- if (in_be32((void __iomem *)IDE_ALTSTATUS_REG) & ERR_STAT &&
- in_be32((void __iomem *)(hwif->dma_base + 0x014)) & INTSTS_INTRQ &&
- dma_stat & 1)
+ /* SCC errata A308 workaround: Step5 (polling IOIRQS) */
+ if (int_stat & INTSTS_IOIRQS)
return 1;
if (!drive->waiting_for_dma)
@@ -498,6 +502,21 @@ static int scc_dma_test_irq(ide_drive_t *drive)
return 0;
}
+static u8 scc_udma_filter(ide_drive_t *drive)
+{
+ ide_hwif_t *hwif = drive->hwif;
+ u8 mask = hwif->ultra_mask;
+
+ /* errata A308 workaround: limit non ide_disk drive to UDMA4 */
+ if ((drive->media != ide_disk) && (mask & 0xE0)) {
+ printk(KERN_INFO "%s: limit %s to UDMA4\n",
+ SCC_PATA_NAME, drive->name);
+ mask = 0x1F;
+ }
+
+ return mask;
+}
+
/**
* setup_mmio_scc - map CTRL/BMID region
* @dev: PCI device we are configuring
@@ -511,8 +530,8 @@ static int setup_mmio_scc (struct pci_dev *dev, const char *name)
unsigned long dma_base = pci_resource_start(dev, 1);
unsigned long ctl_size = pci_resource_len(dev, 0);
unsigned long dma_size = pci_resource_len(dev, 1);
- void *ctl_addr;
- void *dma_addr;
+ void __iomem *ctl_addr;
+ void __iomem *dma_addr;
int i;
for (i = 0; i < MAX_HWIFS; i++) {
@@ -702,6 +721,7 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
hwif->tuneproc = scc_tuneproc;
hwif->ide_dma_check = scc_config_drive_for_dma;
hwif->ide_dma_test_irq = scc_dma_test_irq;
+ hwif->udma_filter = scc_udma_filter;
hwif->drives[0].autotune = IDE_TUNE_AUTO;
hwif->drives[1].autotune = IDE_TUNE_AUTO;
@@ -716,7 +736,7 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
hwif->atapi_dma = 1;
/* we support 80c cable only. */
- hwif->udma_four = 1;
+ hwif->cbl = ATA_CBL_PATA80;
hwif->autodma = 0;
if (!noautodma)
@@ -731,9 +751,10 @@ static void __devinit init_hwif_scc(ide_hwif_t *hwif)
.init_setup = init_setup_scc, \
.init_iops = init_iops_scc, \
.init_hwif = init_hwif_scc, \
- .channels = 1, \
.autodma = AUTODMA, \
.bootable = ON_BOARD, \
+ .host_flags = IDE_HFLAG_SINGLE, \
+ .pio_mask = ATA_PIO4, \
}
static ide_pci_device_t scc_chipsets[] __devinitdata = {
generated by cgit v1.2.3 (git 2.0.4) at 2024-05-23 16:53:11 +0000