Content-Disposition: inline; filename=i2c-i801-05-better-pci-subsystem-integration.patch
i2c-i801: Better pci subsystem integration
Integrate the i2c-i801 driver better with the pci subsystem, by
calling pci_{enable,disable}_device and requesting the I/O region
by BAR rather than direct configuration space access.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
---
drivers/i2c/busses/i2c-i801.c | 38 +++++++++++++++++++++++++++-----------
1 file changed, 27 insertions(+), 11 deletions(-)
--- linux-2.6.17-rc6.orig/drivers/i2c/busses/i2c-i801.c 2006-06-08 14:41:14.000000000 +0200
+++ linux-2.6.17-rc6/drivers/i2c/busses/i2c-i801.c 2006-06-08 15:03:13.000000000 +0200
@@ -66,7 +66,7 @@
#define SMBAUXCTL (13 + i801_smba) /* ICH4 only */
/* PCI Address Constants */
-#define SMBBA 0x020
+#define SMBBAR 4
#define SMBHSTCFG 0x040
#define SMBREV 0x008
@@ -97,7 +97,7 @@
static int i801_block_transaction(union i2c_smbus_data *data, char read_write,
int command, int hwpec);
-static unsigned short i801_smba;
+static unsigned long i801_smba;
static struct pci_driver i801_driver;
static struct pci_dev *I801_dev;
static int isich4;
@@ -105,6 +105,7 @@
static int __devinit i801_setup(struct pci_dev *dev)
{
unsigned char temp;
+ int err;
I801_dev = dev;
if ((dev->device == PCI_DEVICE_ID_INTEL_82801DB_3) ||
@@ -114,19 +115,28 @@
else
isich4 = 0;
+ err = pci_enable_device(dev);
+ if (err) {
+ dev_err(&dev->dev, "Failed to enable SMBus device (%d)\n",
+ err);
+ goto exit;
+ }
+
/* Determine the address of the SMBus area */
- pci_read_config_word(I801_dev, SMBBA, &i801_smba);
- i801_smba &= 0xfff0;
+ i801_smba = pci_resource_start(dev, SMBBAR);
if (!i801_smba) {
dev_err(&dev->dev, "SMBus base address uninitialized, "
"upgrade BIOS\n");
- return -ENODEV;
+ err = -ENODEV;
+ goto exit_disable;
}
- if (!request_region(i801_smba, (isich4 ? 16 : 8), i801_driver.name)) {
- dev_err(&dev->dev, "I801_smb region 0x%x already in use!\n",
- i801_smba);
- return -EBUSY;
+ err = pci_request_region(dev, SMBBAR, i801_driver.name);
+ if (err) {
+ dev_err(&dev->dev, "Failed to request SMBus region "
+ "0x%lx-0x%lx\n", i801_smba,
+ pci_resource_end(dev, SMBBAR));
+ goto exit_disable;
}
pci_read_config_byte(I801_dev, SMBHSTCFG, &temp);
@@ -147,6 +157,11 @@
dev_dbg(&dev->dev, "I801_smba = 0x%X\n", i801_smba);
return 0;
+
+exit_disable:
+ pci_disable_device(dev);
+exit:
+ return err;
}
static int i801_transaction(void)
@@ -521,14 +536,15 @@
i801_adapter.dev.parent = &dev->dev;
snprintf(i801_adapter.name, I2C_NAME_SIZE,
- "SMBus I801 adapter at %04x", i801_smba);
+ "SMBus I801 adapter at %04lx", i801_smba);
return i2c_add_adapter(&i801_adapter);
}
static void __devexit i801_remove(struct pci_dev *dev)
{
i2c_del_adapter(&i801_adapter);
- release_region(i801_smba, (isich4 ? 16 : 8));
+ pci_release_region(dev, SMBBAR);
+ pci_disable_device(dev);
}
static struct pci_driver i801_driver = {
--
Jean Delvare
