#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/stddef.h>
-#include <linux/sched.h>
#include <linux/ioport.h>
#include <linux/init.h>
#include <linux/i2c.h>
#include <linux/delay.h>
+#include <linux/acpi.h>
+#include <linux/slab.h>
#include <asm/io.h>
MODULE_LICENSE("GPL");
int size;
};
+static struct pci_driver amd8111_driver;
+
/*
* AMD PCI control registers definitions.
*/
{
int timeout = 500;
- while (timeout-- && (inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF))
+ while ((inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_IBF) && --timeout)
udelay(1);
if (!timeout) {
- dev_warn(&smbus->dev->dev, "Timeout while waiting for IBF to clear\n");
- return -1;
+ dev_warn(&smbus->dev->dev,
+ "Timeout while waiting for IBF to clear\n");
+ return -ETIMEDOUT;
}
return 0;
{
int timeout = 500;
- while (timeout-- && (~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF))
+ while ((~inb(smbus->base + AMD_EC_SC) & AMD_EC_SC_OBF) && --timeout)
udelay(1);
if (!timeout) {
- dev_warn(&smbus->dev->dev, "Timeout while waiting for OBF to set\n");
- return -1;
+ dev_warn(&smbus->dev->dev,
+ "Timeout while waiting for OBF to set\n");
+ return -ETIMEDOUT;
}
return 0;
}
-static unsigned int amd_ec_read(struct amd_smbus *smbus, unsigned char address, unsigned char *data)
+static unsigned int amd_ec_read(struct amd_smbus *smbus, unsigned char address,
+ unsigned char *data)
{
- if (amd_ec_wait_write(smbus))
- return -1;
+ int status;
+
+ status = amd_ec_wait_write(smbus);
+ if (status)
+ return status;
outb(AMD_EC_CMD_RD, smbus->base + AMD_EC_CMD);
- if (amd_ec_wait_write(smbus))
- return -1;
+ status = amd_ec_wait_write(smbus);
+ if (status)
+ return status;
outb(address, smbus->base + AMD_EC_DATA);
- if (amd_ec_wait_read(smbus))
- return -1;
+ status = amd_ec_wait_read(smbus);
+ if (status)
+ return status;
*data = inb(smbus->base + AMD_EC_DATA);
return 0;
}
-static unsigned int amd_ec_write(struct amd_smbus *smbus, unsigned char address, unsigned char data)
+static unsigned int amd_ec_write(struct amd_smbus *smbus, unsigned char address,
+ unsigned char data)
{
- if (amd_ec_wait_write(smbus))
- return -1;
+ int status;
+
+ status = amd_ec_wait_write(smbus);
+ if (status)
+ return status;
outb(AMD_EC_CMD_WR, smbus->base + AMD_EC_CMD);
- if (amd_ec_wait_write(smbus))
- return -1;
+ status = amd_ec_wait_write(smbus);
+ if (status)
+ return status;
outb(address, smbus->base + AMD_EC_DATA);
- if (amd_ec_wait_write(smbus))
- return -1;
+ status = amd_ec_wait_write(smbus);
+ if (status)
+ return status;
outb(data, smbus->base + AMD_EC_DATA);
return 0;
#define AMD_SMB_PRTCL_PEC 0x80
-static s32 amd8111_access(struct i2c_adapter * adap, u16 addr, unsigned short flags,
- char read_write, u8 command, int size, union i2c_smbus_data * data)
+static s32 amd8111_access(struct i2c_adapter * adap, u16 addr,
+ unsigned short flags, char read_write, u8 command, int size,
+ union i2c_smbus_data * data)
{
struct amd_smbus *smbus = adap->algo_data;
unsigned char protocol, len, pec, temp[2];
int i;
- protocol = (read_write == I2C_SMBUS_READ) ? AMD_SMB_PRTCL_READ : AMD_SMB_PRTCL_WRITE;
+ protocol = (read_write == I2C_SMBUS_READ) ? AMD_SMB_PRTCL_READ
+ : AMD_SMB_PRTCL_WRITE;
pec = (flags & I2C_CLIENT_PEC) ? AMD_SMB_PRTCL_PEC : 0;
switch (size) {
-
case I2C_SMBUS_QUICK:
protocol |= AMD_SMB_PRTCL_QUICK;
read_write = I2C_SMBUS_WRITE;
case I2C_SMBUS_WORD_DATA:
amd_ec_write(smbus, AMD_SMB_CMD, command);
if (read_write == I2C_SMBUS_WRITE) {
- amd_ec_write(smbus, AMD_SMB_DATA, data->word);
- amd_ec_write(smbus, AMD_SMB_DATA + 1, data->word >> 8);
+ amd_ec_write(smbus, AMD_SMB_DATA,
+ data->word & 0xff);
+ amd_ec_write(smbus, AMD_SMB_DATA + 1,
+ data->word >> 8);
}
protocol |= AMD_SMB_PRTCL_WORD_DATA | pec;
break;
case I2C_SMBUS_BLOCK_DATA:
amd_ec_write(smbus, AMD_SMB_CMD, command);
if (read_write == I2C_SMBUS_WRITE) {
- len = min_t(u8, data->block[0], 32);
+ len = min_t(u8, data->block[0],
+ I2C_SMBUS_BLOCK_MAX);
amd_ec_write(smbus, AMD_SMB_BCNT, len);
for (i = 0; i < len; i++)
- amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+ amd_ec_write(smbus, AMD_SMB_DATA + i,
+ data->block[i + 1]);
}
protocol |= AMD_SMB_PRTCL_BLOCK_DATA | pec;
break;
case I2C_SMBUS_I2C_BLOCK_DATA:
- len = min_t(u8, data->block[0], 32);
+ len = min_t(u8, data->block[0],
+ I2C_SMBUS_BLOCK_MAX);
amd_ec_write(smbus, AMD_SMB_CMD, command);
amd_ec_write(smbus, AMD_SMB_BCNT, len);
if (read_write == I2C_SMBUS_WRITE)
for (i = 0; i < len; i++)
- amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+ amd_ec_write(smbus, AMD_SMB_DATA + i,
+ data->block[i + 1]);
protocol |= AMD_SMB_PRTCL_I2C_BLOCK_DATA;
break;
case I2C_SMBUS_PROC_CALL:
amd_ec_write(smbus, AMD_SMB_CMD, command);
- amd_ec_write(smbus, AMD_SMB_DATA, data->word);
+ amd_ec_write(smbus, AMD_SMB_DATA, data->word & 0xff);
amd_ec_write(smbus, AMD_SMB_DATA + 1, data->word >> 8);
protocol = AMD_SMB_PRTCL_PROC_CALL | pec;
read_write = I2C_SMBUS_READ;
break;
case I2C_SMBUS_BLOCK_PROC_CALL:
- protocol |= pec;
- len = min_t(u8, data->block[0], 31);
+ len = min_t(u8, data->block[0],
+ I2C_SMBUS_BLOCK_MAX - 1);
amd_ec_write(smbus, AMD_SMB_CMD, command);
amd_ec_write(smbus, AMD_SMB_BCNT, len);
for (i = 0; i < len; i++)
- amd_ec_write(smbus, AMD_SMB_DATA + i, data->block[i + 1]);
+ amd_ec_write(smbus, AMD_SMB_DATA + i,
+ data->block[i + 1]);
protocol = AMD_SMB_PRTCL_BLOCK_PROC_CALL | pec;
read_write = I2C_SMBUS_READ;
break;
- case I2C_SMBUS_WORD_DATA_PEC:
- case I2C_SMBUS_BLOCK_DATA_PEC:
- case I2C_SMBUS_PROC_CALL_PEC:
- case I2C_SMBUS_BLOCK_PROC_CALL_PEC:
- dev_warn(&adap->dev, "Unexpected software PEC transaction %d\n.", size);
- return -1;
-
default:
dev_warn(&adap->dev, "Unsupported transaction %d\n", size);
- return -1;
+ return -EOPNOTSUPP;
}
amd_ec_write(smbus, AMD_SMB_ADDR, addr << 1);
amd_ec_write(smbus, AMD_SMB_PRTCL, protocol);
+ /* FIXME this discards status from ec_read(); so temp[0] will
+ * hold stack garbage ... the rest of this routine will act
+ * nonsensically. Ignored ec_write() status might explain
+ * some such failures...
+ */
amd_ec_read(smbus, AMD_SMB_STS, temp + 0);
if (~temp[0] & AMD_SMB_STS_DONE) {
}
if ((~temp[0] & AMD_SMB_STS_DONE) || (temp[0] & AMD_SMB_STS_STATUS))
- return -1;
+ return -EIO;
if (read_write == I2C_SMBUS_WRITE)
return 0;
switch (size) {
-
case I2C_SMBUS_BYTE:
case I2C_SMBUS_BYTE_DATA:
amd_ec_read(smbus, AMD_SMB_DATA, &data->byte);
case I2C_SMBUS_BLOCK_DATA:
case I2C_SMBUS_BLOCK_PROC_CALL:
amd_ec_read(smbus, AMD_SMB_BCNT, &len);
- len = min_t(u8, len, 32);
+ len = min_t(u8, len, I2C_SMBUS_BLOCK_MAX);
case I2C_SMBUS_I2C_BLOCK_DATA:
for (i = 0; i < len; i++)
- amd_ec_read(smbus, AMD_SMB_DATA + i, data->block + i + 1);
+ amd_ec_read(smbus, AMD_SMB_DATA + i,
+ data->block + i + 1);
data->block[0] = len;
break;
}
static u32 amd8111_func(struct i2c_adapter *adapter)
{
- return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA |
+ return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
+ I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA | I2C_FUNC_SMBUS_BLOCK_DATA |
I2C_FUNC_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_PROC_CALL |
- I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_HWPEC_CALC;
+ I2C_FUNC_SMBUS_I2C_BLOCK | I2C_FUNC_SMBUS_PEC;
}
-static struct i2c_algorithm smbus_algorithm = {
- .name = "Non-I2C SMBus 2.0 adapter",
- .id = I2C_ALGO_SMBUS,
+static const struct i2c_algorithm smbus_algorithm = {
.smbus_xfer = amd8111_access,
.functionality = amd8111_func,
};
-static struct pci_device_id amd8111_ids[] = {
+static const struct pci_device_id amd8111_ids[] = {
{ PCI_DEVICE(PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_8111_SMBUS2) },
{ 0, }
};
MODULE_DEVICE_TABLE (pci, amd8111_ids);
-static int __devinit amd8111_probe(struct pci_dev *dev, const struct pci_device_id *id)
+static int __devinit amd8111_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
{
struct amd_smbus *smbus;
- int error = -ENODEV;
+ int error;
- if (~pci_resource_flags(dev, 0) & IORESOURCE_IO)
+ if (!(pci_resource_flags(dev, 0) & IORESOURCE_IO))
return -ENODEV;
- smbus = kmalloc(sizeof(struct amd_smbus), GFP_KERNEL);
+ smbus = kzalloc(sizeof(struct amd_smbus), GFP_KERNEL);
if (!smbus)
return -ENOMEM;
- memset(smbus, 0, sizeof(struct amd_smbus));
smbus->dev = dev;
smbus->base = pci_resource_start(dev, 0);
smbus->size = pci_resource_len(dev, 0);
- if (!request_region(smbus->base, smbus->size, "amd8111 SMBus 2.0"))
+ error = acpi_check_resource_conflict(&dev->resource[0]);
+ if (error) {
+ error = -ENODEV;
+ goto out_kfree;
+ }
+
+ if (!request_region(smbus->base, smbus->size, amd8111_driver.name)) {
+ error = -EBUSY;
goto out_kfree;
+ }
smbus->adapter.owner = THIS_MODULE;
- snprintf(smbus->adapter.name, I2C_NAME_SIZE,
+ snprintf(smbus->adapter.name, sizeof(smbus->adapter.name),
"SMBus2 AMD8111 adapter at %04x", smbus->base);
- smbus->adapter.class = I2C_CLASS_HWMON;
+ smbus->adapter.class = I2C_CLASS_HWMON | I2C_CLASS_SPD;
smbus->adapter.algo = &smbus_algorithm;
smbus->adapter.algo_data = smbus;
- /* set up the driverfs linkage to our parent device */
+ /* set up the sysfs linkage to our parent device */
smbus->adapter.dev.parent = &dev->dev;
+ pci_write_config_dword(smbus->dev, AMD_PCI_MISC, 0);
error = i2c_add_adapter(&smbus->adapter);
if (error)
goto out_release_region;
- pci_write_config_dword(smbus->dev, AMD_PCI_MISC, 0);
pci_set_drvdata(dev, smbus);
return 0;
release_region(smbus->base, smbus->size);
out_kfree:
kfree(smbus);
- return -1;
+ return error;
}
-
static void __devexit amd8111_remove(struct pci_dev *dev)
{
struct amd_smbus *smbus = pci_get_drvdata(dev);
return pci_register_driver(&amd8111_driver);
}
-
static void __exit i2c_amd8111_exit(void)
{
pci_unregister_driver(&amd8111_driver);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff