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| author | Jean Delvare <khali@linux-fr.org> | 2009-06-15 18:39:50 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@linux-fr.org> | 2009-06-15 18:39:50 +0200 |
| commit | 2958b1ec6be1d71105d67d70de9d7d70f5e97151 (patch) | |
| tree | cf4c9b80aea488135435bef72de68b940efe7849 /drivers/hwmon | |
| parent | c1e48dce05ff06266cdfd0cba55fc5367cd499a5 (diff) | |
| download | linux-3.10-2958b1ec6be1d71105d67d70de9d7d70f5e97151.tar.gz linux-3.10-2958b1ec6be1d71105d67d70de9d7d70f5e97151.tar.bz2 linux-3.10-2958b1ec6be1d71105d67d70de9d7d70f5e97151.zip | |
hwmon: PCI quirk for hwmon access on MSI MS-7031 board
The MSI MS-7031 is based on an ATI IXP300 south bridge. On this south
bridge, accessible I/O ports must be enabled explicitly. Unfortunately
the BIOS forgets to enable access to the hardware monitoring chip I/O
ports, so hardware monitoring fails.
Add a quirk enabling access to the required ports (0x295-0x296). This
is exactly what MSI's own hardware monitoring application is doing, so
it has to be the right way.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/hwmon')
| -rw-r--r-- | drivers/hwmon/hwmon.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/hwmon/hwmon.c b/drivers/hwmon/hwmon.c index e15c3e7b07e..29ea6753f3b 100644 --- a/drivers/hwmon/hwmon.c +++ b/drivers/hwmon/hwmon.c @@ -18,6 +18,7 @@ #include <linux/hwmon.h> #include <linux/gfp.h> #include <linux/spinlock.h> +#include <linux/pci.h> #define HWMON_ID_PREFIX "hwmon" #define HWMON_ID_FORMAT HWMON_ID_PREFIX "%d" @@ -86,8 +87,36 @@ void hwmon_device_unregister(struct device *dev) "hwmon_device_unregister() failed: bad class ID!\n"); } +static void __init hwmon_pci_quirks(void) +{ +#if defined CONFIG_X86 && defined CONFIG_PCI + struct pci_dev *sb; + u16 base; + u8 enable; + + /* Open access to 0x295-0x296 on MSI MS-7031 */ + sb = pci_get_device(PCI_VENDOR_ID_ATI, 0x436c, NULL); + if (sb && + (sb->subsystem_vendor == 0x1462 && /* MSI */ + sb->subsystem_device == 0x0031)) { /* MS-7031 */ + + pci_read_config_byte(sb, 0x48, &enable); + pci_read_config_word(sb, 0x64, &base); + + if (base == 0 && !(enable & BIT(2))) { + dev_info(&sb->dev, + "Opening wide generic port at 0x295\n"); + pci_write_config_word(sb, 0x64, 0x295); + pci_write_config_byte(sb, 0x48, enable | BIT(2)); + } + } +#endif +} + static int __init hwmon_init(void) { + hwmon_pci_quirks(); + hwmon_class = class_create(THIS_MODULE, "hwmon"); if (IS_ERR(hwmon_class)) { printk(KERN_ERR "hwmon.c: couldn't create sysfs class\n"); |