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path: root/drivers/i2c/busses/i2c-i801.c
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Diffstat (limited to 'drivers/i2c/busses/i2c-i801.c')
-rw-r--r--drivers/i2c/busses/i2c-i801.c121
1 files changed, 55 insertions, 66 deletions
diff --git a/drivers/i2c/busses/i2c-i801.c b/drivers/i2c/busses/i2c-i801.c
index 94a30f5de77..3e0d04d5a80 100644
--- a/drivers/i2c/busses/i2c-i801.c
+++ b/drivers/i2c/busses/i2c-i801.c
@@ -68,7 +68,6 @@
/* PCI Address Constants */
#define SMBBAR 4
#define SMBHSTCFG 0x040
-#define SMBREV 0x008
/* Host configuration bits for SMBHSTCFG */
#define SMBHSTCFG_HST_EN 1
@@ -102,68 +101,6 @@ static struct pci_driver i801_driver;
static struct pci_dev *I801_dev;
static int isich4;
-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) ||
- (dev->device == PCI_DEVICE_ID_INTEL_82801EB_3) ||
- (dev->device == PCI_DEVICE_ID_INTEL_ESB_4))
- isich4 = 1;
- 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 */
- i801_smba = pci_resource_start(dev, SMBBAR);
- if (!i801_smba) {
- dev_err(&dev->dev, "SMBus base address uninitialized, "
- "upgrade BIOS\n");
- err = -ENODEV;
- goto exit_disable;
- }
-
- 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);
- temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
- if (!(temp & SMBHSTCFG_HST_EN)) {
- dev_warn(&dev->dev, "enabling SMBus device\n");
- temp |= SMBHSTCFG_HST_EN;
- }
- pci_write_config_byte(I801_dev, SMBHSTCFG, temp);
-
- if (temp & SMBHSTCFG_SMB_SMI_EN)
- dev_dbg(&dev->dev, "I801 using Interrupt SMI# for SMBus.\n");
- else
- dev_dbg(&dev->dev, "I801 using PCI Interrupt for SMBus.\n");
-
- pci_read_config_byte(I801_dev, SMBREV, &temp);
- dev_dbg(&dev->dev, "SMBREV = 0x%X\n", temp);
- 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)
{
int temp;
@@ -527,17 +464,69 @@ MODULE_DEVICE_TABLE (pci, i801_ids);
static int __devinit i801_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
+ unsigned char temp;
int err;
- if ((err = i801_setup(dev)))
- return err;
+ I801_dev = dev;
+ if ((dev->device == PCI_DEVICE_ID_INTEL_82801DB_3) ||
+ (dev->device == PCI_DEVICE_ID_INTEL_82801EB_3) ||
+ (dev->device == PCI_DEVICE_ID_INTEL_ESB_4))
+ isich4 = 1;
+ else
+ isich4 = 0;
+
+ err = pci_enable_device(dev);
+ if (err) {
+ dev_err(&dev->dev, "Failed to enable SMBus PCI device (%d)\n",
+ err);
+ goto exit;
+ }
+
+ /* Determine the address of the SMBus area */
+ i801_smba = pci_resource_start(dev, SMBBAR);
+ if (!i801_smba) {
+ dev_err(&dev->dev, "SMBus base address uninitialized, "
+ "upgrade BIOS\n");
+ err = -ENODEV;
+ goto exit_disable;
+ }
+
+ 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);
+ temp &= ~SMBHSTCFG_I2C_EN; /* SMBus timing */
+ if (!(temp & SMBHSTCFG_HST_EN)) {
+ dev_info(&dev->dev, "Enabling SMBus device\n");
+ temp |= SMBHSTCFG_HST_EN;
+ }
+ pci_write_config_byte(I801_dev, SMBHSTCFG, temp);
+
+ if (temp & SMBHSTCFG_SMB_SMI_EN)
+ dev_dbg(&dev->dev, "SMBus using interrupt SMI#\n");
+ else
+ dev_dbg(&dev->dev, "SMBus using PCI Interrupt\n");
/* set up the driverfs linkage to our parent device */
i801_adapter.dev.parent = &dev->dev;
snprintf(i801_adapter.name, I2C_NAME_SIZE,
"SMBus I801 adapter at %04lx", i801_smba);
- return i2c_add_adapter(&i801_adapter);
+ err = i2c_add_adapter(&i801_adapter);
+ if (err) {
+ dev_err(&dev->dev, "Failed to add SMBus adapter\n");
+ goto exit_disable;
+ }
+
+exit_disable:
+ pci_disable_device(dev);
+exit:
+ return err;
}
static void __devexit i801_remove(struct pci_dev *dev)