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Subject[PATCH] Add IDE mode support for SB600 SATA
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ATI SB600 SATA controller supports 4 modes: Legacy IDE, Native IDE, AHCI and RAID. Legacy/Native IDE mode is designed for compatibility with some old OS without AHCI driver but looses SATAII/AHCI features such as NCQ. This patch provides users with two options when the SB600 SATA is set as IDE mode by BIOS:
1. Setting the controller back to AHCI mode and using ahci as its driver.
2. Using the controller as a normal IDE.
What's more, without this patch, ahci driver always tries to claim all 4 modes of SB600 SATA, but fails in legacy IDE mode.

Signed-off-by: conke.hu@amd.com
-------
diff -Nur linux-2.6.19-rc6-git4.orig/drivers/ata/ahci.c linux-2.6.19-rc6-git4/drivers/ata/ahci.c
--- linux-2.6.19-rc6-git4.orig/drivers/ata/ahci.c 2006-11-23 13:36:52.000000000 +0800
+++ linux-2.6.19-rc6-git4/drivers/ata/ahci.c 2006-11-23 13:50:13.000000000 +0800
@@ -323,7 +323,14 @@
{ PCI_VDEVICE(JMICRON, 0x2366), board_ahci }, /* JMicron JMB366 */

/* ATI */
+#ifdef CONFIG_SB600_AHCI_IDE
{ PCI_VDEVICE(ATI, 0x4380), board_ahci }, /* ATI SB600 non-raid */
+#else
+ { PCI_VENDOR_ID_ATI, 0x4380, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_RAID<<8, 0xffff00,
+ board_ahci },
+ { PCI_VENDOR_ID_ATI, 0x4380, PCI_ANY_ID, PCI_ANY_ID, 0x010600, 0xffff00,
+ board_ahci },
+#endif
{ PCI_VDEVICE(ATI, 0x4381), board_ahci }, /* ATI SB600 raid */

/* VIA */
diff -Nur linux-2.6.19-rc6-git4.orig/drivers/ata/Kconfig linux-2.6.19-rc6-git4/drivers/ata/Kconfig
--- linux-2.6.19-rc6-git4.orig/drivers/ata/Kconfig 2006-11-23 13:36:52.000000000 +0800
+++ linux-2.6.19-rc6-git4/drivers/ata/Kconfig 2006-11-23 13:37:50.000000000 +0800
@@ -27,6 +27,18 @@

If unsure, say N.

+config SB600_AHCI_IDE
+ bool "ATI SB600 IDE mode of SATA controller support"
+ depends on SATA_AHCI
+ default y
+ help
+ ATI SB600 SATA controller supports 4 modes: Legacy IDE, Native
+ IDE, AHCI and RAID. If this option is enabled, the contoller
+ will run in AHCI mode and use ahci.ko as it's driver, otherwise
+ it will work as an IDE controller using atiixp.ko as it's driver.
+
+ If unsure, say y.
+
config SATA_SVW
tristate "ServerWorks Frodo / Apple K2 SATA support"
depends on PCI
diff -Nur linux-2.6.19-rc6-git4.orig/drivers/ide/pci/atiixp.c linux-2.6.19-rc6-git4/drivers/ide/pci/atiixp.c
--- linux-2.6.19-rc6-git4.orig/drivers/ide/pci/atiixp.c 2006-11-23 13:36:51.000000000 +0800
+++ linux-2.6.19-rc6-git4/drivers/ide/pci/atiixp.c 2006-11-23 13:38:08.000000000 +0800
@@ -318,7 +318,8 @@
hwif->drives[0].autodma = hwif->autodma;
}

-static void __devinit init_hwif_sb600_legacy(ide_hwif_t *hwif)
+#ifndef CONFIG_SB600_AHCI_IDE
+static void __devinit init_hwif_sb600_sata(ide_hwif_t *hwif)
{

hwif->atapi_dma = 1;
@@ -331,6 +332,7 @@
hwif->drives[0].autodma = hwif->autodma;
hwif->drives[1].autodma = hwif->autodma;
}
+#endif

static ide_pci_device_t atiixp_pci_info[] __devinitdata = {
{ /* 0 */
@@ -340,13 +342,16 @@
.autodma = AUTODMA,
.enablebits = {{0x48,0x01,0x00}, {0x48,0x08,0x00}},
.bootable = ON_BOARD,
- },{ /* 1 */
- .name = "ATI SB600 SATA Legacy IDE",
- .init_hwif = init_hwif_sb600_legacy,
+ },
+#ifndef CONFIG_SB600_AHCI_IDE
+ { /* 1 */
+ .name = "ATI SB600 SATA (IDE mode)",
+ .init_hwif = init_hwif_sb600_sata,
.channels = 2,
.autodma = AUTODMA,
.bootable = ON_BOARD,
}
+#endif
};

/**
@@ -368,7 +373,9 @@
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP300_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP400_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
{ PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_IDE, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
- { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, PCI_ANY_ID, PCI_ANY_ID, (PCI_CLASS_STORAGE_IDE<<8)|0x8a, 0xffff05, 1},
+#ifndef CONFIG_SB600_AHCI_IDE
+ { PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, PCI_ANY_ID, PCI_ANY_ID, PCI_CLASS_STORAGE_IDE<<8, 0xffff00, 1},
+#endif
{ 0, },
};
MODULE_DEVICE_TABLE(pci, atiixp_pci_tbl);
diff -Nur linux-2.6.19-rc6-git4.orig/drivers/pci/quirks.c linux-2.6.19-rc6-git4/drivers/pci/quirks.c
--- linux-2.6.19-rc6-git4.orig/drivers/pci/quirks.c 2006-11-23 13:36:52.000000000 +0800
+++ linux-2.6.19-rc6-git4/drivers/pci/quirks.c 2006-11-23 13:38:17.000000000 +0800
@@ -796,6 +796,25 @@
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master );

+#ifdef CONFIG_SB600_AHCI_IDE
+static void __devinit quirk_sb600_sata(struct pci_dev *pdev)
+{
+ if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE) {
+ u8 tmp;
+
+ pci_read_config_byte(pdev, 0x40, &tmp);
+ pci_write_config_byte(pdev, 0x40, tmp|1);
+ pci_write_config_byte(pdev, 0x9, 1);
+ pci_write_config_byte(pdev, 0xa, 6);
+ pci_write_config_byte(pdev, 0x40, tmp);
+
+ pdev->class = 0x010601;
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_IXP600_SATA, quirk_sb600_sata);
+#endif
+
+
/*
* As per PCI spec, ignore base address registers 0-3 of the IDE controllers
* running in Compatible mode (bits 0 and 2 in the ProgIf for primary and
-
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