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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2011-10-13 13:05:24 +0200
committerJeff Garzik <jgarzik@redhat.com>2012-01-08 19:14:58 -0500
commitd63e94a442df14c4e7b02763c3230374218b41f1 (patch)
treecc7483203a367109b2aa31e9585362b1b140557b /drivers/ata
parent002ae08448e241ea8e304008f9cb4bc836f9ff16 (diff)
downloadblackbird-op-linux-d63e94a442df14c4e7b02763c3230374218b41f1.tar.gz
blackbird-op-linux-d63e94a442df14c4e7b02763c3230374218b41f1.zip
pata_cs5536: forward port changes from cs5536
* Fix cable detection to also account for the slave device cable bit. * Disable UDMA when programming MWDMA in cs5536_set_dmamode(). * Don't change UDMA settings in cs5536_set_piomode(). * Add cs5536_program_dtc() helper. * Cleanup and uninline cs5536_[read,write]() methods. Cc: Martin K. Petersen <mkp@mkp.net> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
Diffstat (limited to 'drivers/ata')
-rw-r--r--drivers/ata/pata_cs5536.c99
1 files changed, 42 insertions, 57 deletions
diff --git a/drivers/ata/pata_cs5536.c b/drivers/ata/pata_cs5536.c
index 628c8fae5937..7a402c75ab90 100644
--- a/drivers/ata/pata_cs5536.c
+++ b/drivers/ata/pata_cs5536.c
@@ -1,6 +1,7 @@
/*
* pata_cs5536.c - CS5536 PATA for new ATA layer
* (C) 2007 Martin K. Petersen <mkp@mkp.net>
+ * (C) 2011 Bartlomiej Zolnierkiewicz
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -55,24 +56,16 @@ MODULE_PARM_DESC(msr, "Force using MSR to configure IDE function (Default: 0)");
#define DRV_VERSION "0.0.8"
enum {
- CFG = 0,
- DTC = 1,
- CAST = 2,
- ETC = 3,
-
- MSR_IDE_BASE = 0x51300000,
- MSR_IDE_CFG = (MSR_IDE_BASE + 0x10),
- MSR_IDE_DTC = (MSR_IDE_BASE + 0x12),
- MSR_IDE_CAST = (MSR_IDE_BASE + 0x13),
- MSR_IDE_ETC = (MSR_IDE_BASE + 0x14),
-
+ MSR_IDE_CFG = 0x51300010,
PCI_IDE_CFG = 0x40,
- PCI_IDE_DTC = 0x48,
- PCI_IDE_CAST = 0x4c,
- PCI_IDE_ETC = 0x50,
- IDE_CFG_CHANEN = 0x2,
- IDE_CFG_CABLE = 0x10000,
+ CFG = 0,
+ DTC = 2,
+ CAST = 3,
+ ETC = 4,
+
+ IDE_CFG_CHANEN = (1 << 1),
+ IDE_CFG_CABLE = (1 << 17) | (1 << 16),
IDE_D0_SHIFT = 24,
IDE_D1_SHIFT = 16,
@@ -84,45 +77,50 @@ enum {
IDE_CAST_CMD_MASK = 0xff,
IDE_CAST_CMD_SHIFT = 24,
- IDE_ETC_NODMA = 0x03,
-};
-
-static const u32 msr_reg[4] = {
- MSR_IDE_CFG, MSR_IDE_DTC, MSR_IDE_CAST, MSR_IDE_ETC,
-};
-
-static const u8 pci_reg[4] = {
- PCI_IDE_CFG, PCI_IDE_DTC, PCI_IDE_CAST, PCI_IDE_ETC,
+ IDE_ETC_UDMA_MASK = 0xc0,
};
-static inline int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
+static int cs5536_read(struct pci_dev *pdev, int reg, u32 *val)
{
if (unlikely(use_msr)) {
u32 dummy __maybe_unused;
- rdmsr(msr_reg[reg], *val, dummy);
+ rdmsr(MSR_IDE_CFG + reg, *val, dummy);
return 0;
}
- return pci_read_config_dword(pdev, pci_reg[reg], val);
+ return pci_read_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
}
-static inline int cs5536_write(struct pci_dev *pdev, int reg, int val)
+static int cs5536_write(struct pci_dev *pdev, int reg, int val)
{
if (unlikely(use_msr)) {
- wrmsr(msr_reg[reg], val, 0);
+ wrmsr(MSR_IDE_CFG + reg, val, 0);
return 0;
}
- return pci_write_config_dword(pdev, pci_reg[reg], val);
+ return pci_write_config_dword(pdev, PCI_IDE_CFG + reg * 4, val);
+}
+
+static void cs5536_program_dtc(struct ata_device *adev, u8 tim)
+{
+ struct pci_dev *pdev = to_pci_dev(adev->link->ap->host->dev);
+ int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
+ u32 dtc;
+
+ cs5536_read(pdev, DTC, &dtc);
+ dtc &= ~(IDE_DRV_MASK << dshift);
+ dtc |= tim << dshift;
+ cs5536_write(pdev, DTC, dtc);
}
/**
* cs5536_cable_detect - detect cable type
* @ap: Port to detect on
*
- * Perform cable detection for ATA66 capable cable. Return a libata
- * cable type.
+ * Perform cable detection for ATA66 capable cable.
+ *
+ * Returns a cable type.
*/
static int cs5536_cable_detect(struct ata_port *ap)
@@ -132,7 +130,7 @@ static int cs5536_cable_detect(struct ata_port *ap)
cs5536_read(pdev, CFG, &cfg);
- if (cfg & (IDE_CFG_CABLE << ap->port_no))
+ if (cfg & IDE_CFG_CABLE)
return ATA_CBL_PATA80;
else
return ATA_CBL_PATA40;
@@ -162,19 +160,15 @@ static void cs5536_set_piomode(struct ata_port *ap, struct ata_device *adev)
struct ata_device *pair = ata_dev_pair(adev);
int mode = adev->pio_mode - XFER_PIO_0;
int cmdmode = mode;
- int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
int cshift = adev->devno ? IDE_CAST_D1_SHIFT : IDE_CAST_D0_SHIFT;
- u32 dtc, cast, etc;
+ u32 cast;
if (pair)
cmdmode = min(mode, pair->pio_mode - XFER_PIO_0);
- cs5536_read(pdev, DTC, &dtc);
- cs5536_read(pdev, CAST, &cast);
- cs5536_read(pdev, ETC, &etc);
+ cs5536_program_dtc(adev, drv_timings[mode]);
- dtc &= ~(IDE_DRV_MASK << dshift);
- dtc |= drv_timings[mode] << dshift;
+ cs5536_read(pdev, CAST, &cast);
cast &= ~(IDE_CAST_DRV_MASK << cshift);
cast |= addr_timings[mode] << cshift;
@@ -182,12 +176,7 @@ static void cs5536_set_piomode(struct ata_port *ap, struct ata_device *adev)
cast &= ~(IDE_CAST_CMD_MASK << IDE_CAST_CMD_SHIFT);
cast |= cmd_timings[cmdmode] << IDE_CAST_CMD_SHIFT;
- etc &= ~(IDE_DRV_MASK << dshift);
- etc |= IDE_ETC_NODMA << dshift;
-
- cs5536_write(pdev, DTC, dtc);
cs5536_write(pdev, CAST, cast);
- cs5536_write(pdev, ETC, etc);
}
/**
@@ -208,25 +197,21 @@ static void cs5536_set_dmamode(struct ata_port *ap, struct ata_device *adev)
};
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
- u32 dtc, etc;
+ u32 etc;
int mode = adev->dma_mode;
int dshift = adev->devno ? IDE_D1_SHIFT : IDE_D0_SHIFT;
- if (mode >= XFER_UDMA_0) {
- cs5536_read(pdev, ETC, &etc);
+ cs5536_read(pdev, ETC, &etc);
+ if (mode >= XFER_UDMA_0) {
etc &= ~(IDE_DRV_MASK << dshift);
etc |= udma_timings[mode - XFER_UDMA_0] << dshift;
-
- cs5536_write(pdev, ETC, etc);
} else { /* MWDMA */
- cs5536_read(pdev, DTC, &dtc);
-
- dtc &= ~(IDE_DRV_MASK << dshift);
- dtc |= mwdma_timings[mode - XFER_MW_DMA_0] << dshift;
-
- cs5536_write(pdev, DTC, dtc);
+ etc &= ~(IDE_ETC_UDMA_MASK << dshift);
+ cs5536_program_dtc(adev, mwdma_timings[mode - XFER_MW_DMA_0]);
}
+
+ cs5536_write(pdev, ETC, etc);
}
static struct scsi_host_template cs5536_sht = {
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