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authorRudolf Marek <r.marek@sh.cvut.cz>2006-04-25 13:06:41 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-22 11:10:32 -0700
commit54aaa1ca1022d95d854315743241bb6bf59f531f (patch)
treeaf43ffb4efb559b823b6ce6db30df3667ecfe194 /drivers/i2c
parent5e9f4f2e5a02bb6908278a819952aa31fffefaa2 (diff)
[PATCH] I2C: i2c-piix4: Remove the fix_hstcfg parameter
This patch removes the fix_hstcfg option from the driver and related SMBus Interrupt Select register magic because now we know what are valid values for this register. This patch updates the documentation and adds new IRQ mode check so we are sure not to miss any new "unusual" value. The PCI quirk for users of fix_hstcfg was not developed because the chipset lacks of subsystem ID registers and DMI is stated "To be filled". Impact to existing systems is minimal because the problem showed up on motherboards like 10 years back. On the other hand users of newer Serverworks and HT1000 systems won't be misleaded by the message suggesting to try the fix_hstcfg any more. Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/i2c-piix4.c25
1 files changed, 1 insertions, 24 deletions
diff --git a/drivers/i2c/busses/i2c-piix4.c b/drivers/i2c/busses/i2c-piix4.c
index 5f06e81a208..05af7b0292f 100644
--- a/drivers/i2c/busses/i2c-piix4.c
+++ b/drivers/i2c/busses/i2c-piix4.c
@@ -102,13 +102,6 @@ MODULE_PARM_DESC(force_addr,
"Forcibly enable the PIIX4 at the given address. "
"EXTREMELY DANGEROUS!");
-/* If fix_hstcfg is set to anything different from 0, we reset one of the
- registers to be a valid value. */
-static int fix_hstcfg;
-module_param (fix_hstcfg, int, 0);
-MODULE_PARM_DESC(fix_hstcfg,
- "Fix config register. Needed on some boards (Force CPCI735).");
-
static int piix4_transaction(void);
static unsigned short piix4_smba;
@@ -166,22 +159,6 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
pci_read_config_byte(PIIX4_dev, SMBHSTCFG, &temp);
- /* Some BIOS will set up the chipset incorrectly and leave a register
- in an undefined state (causing I2C to act very strangely). */
- if (temp & 0x02) {
- if (fix_hstcfg) {
- dev_info(&PIIX4_dev->dev, "Working around buggy BIOS "
- "(I2C)\n");
- temp &= 0xfd;
- pci_write_config_byte(PIIX4_dev, SMBHSTCFG, temp);
- } else {
- dev_info(&PIIX4_dev->dev, "Unusual config register "
- "value\n");
- dev_info(&PIIX4_dev->dev, "Try using fix_hstcfg=1 if "
- "you experience problems\n");
- }
- }
-
/* If force_addr is set, we program the new address here. Just to make
sure, we disable the PIIX4 first. */
if (force_addr) {
@@ -214,7 +191,7 @@ static int __devinit piix4_setup(struct pci_dev *PIIX4_dev,
}
}
- if ((temp & 0x0E) == 8)
+ if (((temp & 0x0E) == 8) || ((temp & 0x0E) == 2))
dev_dbg(&PIIX4_dev->dev, "Using Interrupt 9 for SMBus.\n");
else if ((temp & 0x0E) == 0)
dev_dbg(&PIIX4_dev->dev, "Using Interrupt SMI# for SMBus.\n");