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Date: Tue, 22 Apr 2008 10:09:01 +0800
From: alek du <alek.du@...el.com>
To: <linux-kernel@...r.kernel.org>
Cc: jgarzik@...ox.com
Subject: [PATCH 3/3] ata: Add Intel SCH PATA support
This patch adds Intel SCH chipsets (US15W, US15L, UL11L) PATA controller
support.
Signed-off-by: Alek Du <alek.du@...el.com>
---
drivers/ata/ata_piix.c | 40 ++++++++++++++++++++++++++++++++++++++--
drivers/ide/pci/piix.c | 2 ++
2 files changed, 40 insertions(+), 2 deletions(-)
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index b7c38ee..7f95a9a 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -214,6 +214,8 @@ static const struct pci_device_id piix_pci_tbl[] = {
/* ICH7/7-R (i945, i975) UDMA 100*/
{ 0x8086, 0x27DF, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
{ 0x8086, 0x269E, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
+ /* INTEL SCH UDMA 100 */
+ { 0x8086, 0x811A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
/* ICH8 Mobile PATA Controller */
{ 0x8086, 0x2850, PCI_ANY_ID, PCI_ANY_ID, 0, 0, ich_pata_100 },
@@ -561,6 +563,10 @@ struct ich_laptop {
u16 subdevice;
};
+struct sch_80 {
+ u16 device;
+};
+
/*
* List of laptops that use short cables rather than 80 wire
*/
@@ -577,6 +583,17 @@ static const struct ich_laptop ich_laptop[] = {
{ 0, }
};
+/*
+ * List of chipsets whose port IOCFG and enable bit registers are reserved
+ */
+
+static const struct sch_80 sch_80[] = {
+ /* devid */
+ { 0x811A }, /* Intel SCH chipset */
+ /* end marker */
+ { 0, }
+};
+
/**
* ich_pata_cable_detect - Probe host controller cable detect info
* @ap: Port for which cable detect info is desired
@@ -592,6 +609,7 @@ static int ich_pata_cable_detect(struct ata_port *ap)
{
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
const struct ich_laptop *lap = &ich_laptop[0];
+ const struct sch_80 *sch = &sch_80[0];
u8 tmp, mask;
/* Check for specials - Acer Aspire 5602WLMi */
@@ -604,6 +622,13 @@ static int ich_pata_cable_detect(struct ata_port *ap)
lap++;
}
+ /* Check for specials - Intel SCH chipset */
+ while (sch->device) {
+ if (sch->device == pdev->device)
+ return ATA_CBL_PATA80;
+ sch++;
+ }
+
/* check BIOS cable detect results */
mask = ap->port_no == 0 ? PIIX_80C_PRI : PIIX_80C_SEC;
pci_read_config_byte(pdev, PIIX_IOCFG, &tmp);
@@ -624,9 +649,20 @@ static int piix_pata_prereset(struct ata_link *link, unsigned long deadline)
{
struct ata_port *ap = link->ap;
struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+ const struct sch_80 *sch = &sch_80[0];
+ int skip_check = 0;
- if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
- return -ENOENT;
+ /* Check for specials - Intel SCH chipset */
+ while (sch->device) {
+ if (sch->device == pdev->device) {
+ skip_check = 1;
+ break;
+ }
+ sch++;
+ }
+ if (!skip_check)
+ if (!pci_test_config_bits(pdev, &piix_enable_bits[ap->port_no]))
+ return -ENOENT;
return ata_sff_prereset(link, deadline);
}
diff --git a/drivers/ide/pci/piix.c b/drivers/ide/pci/piix.c
index decef0f..dce830b 100644
--- a/drivers/ide/pci/piix.c
+++ b/drivers/ide/pci/piix.c
@@ -377,6 +377,7 @@ static const struct ide_port_info piix_pci_info[] __devinitdata = {
/* 22 */ DECLARE_ICH_DEV("ICH4", ATA_UDMA5),
/* 23 */ DECLARE_ICH_DEV("ESB2", ATA_UDMA5),
/* 24 */ DECLARE_ICH_DEV("ICH8M", ATA_UDMA5),
+ /* 25 */ DECLARE_ICH_DEV("SCH", ATA_UDMA5),
};
/**
@@ -450,6 +451,7 @@ static const struct pci_device_id piix_pci_tbl[] = {
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_82801DB_1), 22 },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ESB2_18), 23 },
{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_ICH8_6), 24 },
+ { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_SCH_IDE), 25 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, piix_pci_tbl);
--
1.5.2.5
--
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