ChangeSet@1.884, 2002-12-16 11:00:04+01:00, vojtech@suse.cz
  Workaround problems with vt8235 and certain CD/DVD-ROMs.


 via82cxxx.c |   20 ++++++++++++--------
 1 files changed, 12 insertions(+), 8 deletions(-)


diff -Nru a/drivers/ide/pci/via82cxxx.c b/drivers/ide/pci/via82cxxx.c
--- a/drivers/ide/pci/via82cxxx.c	Mon Dec 16 11:33:37 2002
+++ b/drivers/ide/pci/via82cxxx.c	Mon Dec 16 11:33:37 2002
@@ -67,6 +67,7 @@
 #define VIA_SET_FIFO		0x040	/* Needs to have FIFO split set */
 #define VIA_NO_UNMASK		0x080	/* Doesn't work with IRQ unmasking on */
 #define VIA_BAD_ID		0x100	/* Has wrong vendor ID (0x1107) */
+#define VIA_NO_CMD_AS		0x200	/* Don't program command and address setup timings */
 
 /*
  * VIA SouthBridge chips.
@@ -80,10 +81,10 @@
 	u16 flags;
 } via_isa_bridges[] = {
 #ifdef FUTURE_BRIDGES
-	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, VIA_UDMA_133 },
+	{ "vt8237",	PCI_DEVICE_ID_VIA_8237,     0x00, 0x2f, VIA_UDMA_133 | VIA_NO_CMD_AS },
 #endif
-	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, VIA_UDMA_133 },
-	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, VIA_UDMA_133 },
+	{ "vt8235",	PCI_DEVICE_ID_VIA_8235,     0x00, 0x2f, VIA_UDMA_133 | VIA_NO_CMD_AS },
+	{ "vt8233a",	PCI_DEVICE_ID_VIA_8233A,    0x00, 0x2f, VIA_UDMA_133 | VIA_NO_CMD_AS },
 	{ "vt8233c",	PCI_DEVICE_ID_VIA_8233C_0,  0x00, 0x2f, VIA_UDMA_100 },
 	{ "vt8233",	PCI_DEVICE_ID_VIA_8233_0,   0x00, 0x2f, VIA_UDMA_100 },
 	{ "vt8231",	PCI_DEVICE_ID_VIA_8231,     0x00, 0x2f, VIA_UDMA_100 },
@@ -292,12 +293,15 @@
 {
 	u8 t;
 
-	pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
-	t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
-	pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
+	if (~via_config->flags & VIA_NO_CMD_AS) {
+
+		pci_read_config_byte(dev, VIA_ADDRESS_SETUP, &t);
+		t = (t & ~(3 << ((3 - dn) << 1))) | ((FIT(timing->setup, 1, 4) - 1) << ((3 - dn) << 1));
+		pci_write_config_byte(dev, VIA_ADDRESS_SETUP, t);
 
-	pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
-		((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
+		pci_write_config_byte(dev, VIA_8BIT_TIMING + (1 - (dn >> 1)),
+			((FIT(timing->act8b, 1, 16) - 1) << 4) | (FIT(timing->rec8b, 1, 16) - 1));
+	}
 
 	pci_write_config_byte(dev, VIA_DRIVE_TIMING + (3 - dn),
 		((FIT(timing->active, 1, 16) - 1) << 4) | (FIT(timing->recover, 1, 16) - 1));