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Commit 828b358c authored by Christoph Hellwig's avatar Christoph Hellwig
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[PATCH] i2c: bring i2c-viapro uptodate with the style guide

parent 99676dae
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Showing with 149 additions and 172 deletions
drivers/i2c/busses/i2c-viapro.c
View file @ 828b358c
......@@ -42,23 +42,24 @@
#include <linux/init.h>
#include <asm/io.h>
#define SMBBA1 0x90
#define SMBBA2 0x80
#define SMBBA3 0xD0
#define SMBBA1 0x90
#define SMBBA2 0x80
#define SMBBA3 0xD0
/* SMBus address offsets */
#define SMBHSTSTS (0 + vt596_smba)
#define SMBHSLVSTS (1 + vt596_smba)
#define SMBHSTCNT (2 + vt596_smba)
#define SMBHSTCMD (3 + vt596_smba)
#define SMBHSTADD (4 + vt596_smba)
#define SMBHSTDAT0 (5 + vt596_smba)
#define SMBHSTDAT1 (6 + vt596_smba)
#define SMBBLKDAT (7 + vt596_smba)
#define SMBSLVCNT (8 + vt596_smba)
#define SMBSHDWCMD (9 + vt596_smba)
#define SMBSLVEVT (0xA + vt596_smba)
#define SMBSLVDAT (0xC + vt596_smba)
static unsigned short vt596_smba;
#define SMBHSTSTS (vt596_smba + 0)
#define SMBHSLVSTS (vt596_smba + 1)
#define SMBHSTCNT (vt596_smba + 2)
#define SMBHSTCMD (vt596_smba + 3)
#define SMBHSTADD (vt596_smba + 4)
#define SMBHSTDAT0 (vt596_smba + 5)
#define SMBHSTDAT1 (vt596_smba + 6)
#define SMBBLKDAT (vt596_smba + 7)
#define SMBSLVCNT (vt596_smba + 8)
#define SMBSHDWCMD (vt596_smba + 9)
#define SMBSLVEVT (vt596_smba + 0xA)
#define SMBSLVDAT (vt596_smba + 0xC)
/* PCI Address Constants */
......@@ -68,14 +69,14 @@
static unsigned short smb_cf_hstcfg = 0xD2;
#define SMBHSTCFG (smb_cf_hstcfg)
#define SMBSLVC (SMBHSTCFG+1)
#define SMBSHDW1 (SMBHSTCFG+2)
#define SMBSHDW2 (SMBHSTCFG+3)
#define SMBREV (SMBHSTCFG+4)
#define SMBSLVC (smb_cf_hstcfg + 1)
#define SMBSHDW1 (smb_cf_hstcfg + 2)
#define SMBSHDW2 (smb_cf_hstcfg + 3)
#define SMBREV (smb_cf_hstcfg + 4)
/* Other settings */
#define MAX_TIMEOUT 500
#define ENABLE_INT9 0
#define MAX_TIMEOUT 500
#define ENABLE_INT9 0
/* VT82C596 constants */
#define VT596_QUICK 0x00
......@@ -84,144 +85,33 @@ static unsigned short smb_cf_hstcfg = 0xD2;
#define VT596_WORD_DATA 0x0C
#define VT596_BLOCK_DATA 0x14
/* insmod parameters */
/* If force is set to anything different from 0, we forcibly enable the
VT596. DANGEROUS! */
static int force = 0;
static int force;
MODULE_PARM(force, "i");
MODULE_PARM_DESC(force, "Forcibly enable the SMBus. DANGEROUS!");
/* If force_addr is set to anything different from 0, we forcibly enable
the VT596 at the given address. VERY DANGEROUS! */
static int force_addr = 0;
static int force_addr;
MODULE_PARM(force_addr, "i");
MODULE_PARM_DESC(force_addr,
"Forcibly enable the SMBus at the given address. "
"EXTREMELY DANGEROUS!");
static void vt596_do_pause(unsigned int amount);
static int vt596_transaction(void);
s32 vt596_access(struct i2c_adapter * adap, u16 addr, unsigned short flags,
char read_write, u8 command, int size, union i2c_smbus_data * data);
u32 vt596_func(struct i2c_adapter *adapter);
static struct i2c_algorithm smbus_algorithm = {
.name = "Non-I2C SMBus adapter",
.id = I2C_ALGO_SMBUS,
.smbus_xfer = vt596_access,
.functionality = vt596_func,
};
static struct i2c_adapter vt596_adapter = {
.owner = THIS_MODULE,
.id = I2C_ALGO_SMBUS | I2C_HW_SMBUS_VIA2,
.algo = &smbus_algorithm,
.dev = {
.name = "unset",
},
};
static unsigned short vt596_smba = 0;
/* Detect whether a compatible device can be found, and initialize it. */
int vt596_setup(struct pci_dev *VT596_dev, struct pci_device_id const *id)
{
unsigned char temp;
dev_info(&VT596_dev->dev, "Found Via %s device\n", VT596_dev->dev.name);
/* Determine the address of the SMBus areas */
if (force_addr) {
vt596_smba = force_addr & 0xfff0;
force = 0;
} else {
if ((pci_read_config_word(VT596_dev, id->driver_data, &vt596_smba))
|| !(vt596_smba & 0x1)) {
/* try 2nd address and config reg. for 596 */
if((id->device == PCI_DEVICE_ID_VIA_82C596_3) &&
(!pci_read_config_word(VT596_dev, SMBBA2, &vt596_smba)) &&
(vt596_smba & 0x1)) {
smb_cf_hstcfg = 0x84;
} else {
/* no matches at all */
dev_err(&VT596_dev->dev, "Cannot configure "
"SMBus I/O Base address\n");
return(-ENODEV);
}
}
vt596_smba &= 0xfff0;
if(vt596_smba == 0) {
dev_err(&VT596_dev->dev, "SMBus base address "
"uninitialized - upgrade BIOS or use "
"force_addr=0xaddr\n");
return -ENODEV;
}
}
if (!request_region(vt596_smba, 8, "viapro-smbus")) {
dev_err(&VT596_dev->dev, "SMBus region 0x%x already in use!\n",
vt596_smba);
return(-ENODEV);
}
pci_read_config_byte(VT596_dev, SMBHSTCFG, &temp);
/* If force_addr is set, we program the new address here. Just to make
sure, we disable the VT596 first. */
if (force_addr) {
pci_write_config_byte(VT596_dev, SMBHSTCFG, temp & 0xfe);
pci_write_config_word(VT596_dev, id->driver_data, vt596_smba);
pci_write_config_byte(VT596_dev, SMBHSTCFG, temp | 0x01);
dev_warn(&VT596_dev->dev, "WARNING: SMBus interface set to new "
"address 0x%04x!\n", vt596_smba);
} else if ((temp & 1) == 0) {
if (force) {
/* NOTE: This assumes I/O space and other allocations
* WERE done by the Bios! Don't complain if your
* hardware does weird things after enabling this.
* :') Check for Bios updates before resorting to
* this.
*/
pci_write_config_byte(VT596_dev, SMBHSTCFG,
temp | 1);
dev_info(&VT596_dev->dev, "Enabling SMBus device\n");
} else {
dev_err(&VT596_dev->dev, "SMBUS: Error: Host SMBus "
"controller not enabled! - upgrade BIOS or "
"use force=1\n");
return(-ENODEV);
}
}
if ((temp & 0x0E) == 8)
dev_dbg(&VT596_dev->dev, "using Interrupt 9 for SMBus.\n");
else if ((temp & 0x0E) == 0)
dev_dbg(&VT596_dev->dev, "using Interrupt SMI# for SMBus.\n");
else
dev_dbg(&VT596_dev->dev, "Illegal Interrupt configuration "
"(or code out of date)!\n");
pci_read_config_byte(VT596_dev, SMBREV, &temp);
dev_dbg(&VT596_dev->dev, "SMBREV = 0x%X\n", temp);
dev_dbg(&VT596_dev->dev, "VT596_smba = 0x%X\n", vt596_smba);
return(0);
}
static struct i2c_adapter vt596_adapter;
/* Internally used pause function */
void vt596_do_pause(unsigned int amount)
static void vt596_do_pause(unsigned int amount)
{
current->state = TASK_INTERRUPTIBLE;
schedule_timeout(amount);
}
/* Another internally used function */
int vt596_transaction(void)
static int vt596_transaction(void)
{
int temp;
int result = 0;
......@@ -296,15 +186,16 @@ int vt596_transaction(void)
}
/* Return -1 on error. */
s32 vt596_access(struct i2c_adapter *adap, u16 addr, unsigned short flags,
char read_write, u8 command, int size,
union i2c_smbus_data * data)
static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
unsigned short flags, char read_write, u8 command,
int size, union i2c_smbus_data *data)
{
int i, len;
switch (size) {
case I2C_SMBUS_PROC_CALL:
dev_info(&vt596_adapter.dev, "I2C_SMBUS_PROC_CALL not supported!\n");
dev_info(&vt596_adapter.dev,
"I2C_SMBUS_PROC_CALL not supported!\n");
return -1;
case I2C_SMBUS_QUICK:
outb_p(((addr & 0x7f) << 1) | (read_write & 0x01),
......@@ -363,7 +254,6 @@ s32 vt596_access(struct i2c_adapter *adap, u16 addr, unsigned short flags,
if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))
return 0;
switch (size) {
case VT596_BYTE:
/* Where is the result put? I assume here it is in
......@@ -388,15 +278,127 @@ s32 vt596_access(struct i2c_adapter *adap, u16 addr, unsigned short flags,
return 0;
}
u32 vt596_func(struct i2c_adapter *adapter)
static u32 vt596_func(struct i2c_adapter *adapter)
{
return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
I2C_FUNC_SMBUS_BLOCK_DATA;
}
static struct i2c_algorithm smbus_algorithm = {
.name = "Non-I2C SMBus adapter",
.id = I2C_ALGO_SMBUS,
.smbus_xfer = vt596_access,
.functionality = vt596_func,
};
static struct i2c_adapter vt596_adapter = {
.owner = THIS_MODULE,
.id = I2C_ALGO_SMBUS | I2C_HW_SMBUS_VIA2,
.algo = &smbus_algorithm,
.dev = {
.name = "unset",
},
};
static int __devinit vt596_probe(struct pci_dev *pdev,
const struct pci_device_id *id)
{
unsigned char temp;
int error = -ENODEV;
/* Determine the address of the SMBus areas */
if (force_addr) {
vt596_smba = force_addr & 0xfff0;
force = 0;
goto found;
}
if ((pci_read_config_word(pdev, id->driver_data, &vt596_smba)) ||
!(vt596_smba & 0x1)) {
/* try 2nd address and config reg. for 596 */
if (id->device == PCI_DEVICE_ID_VIA_82C596_3 &&
!pci_read_config_word(pdev, SMBBA2, &vt596_smba) &&
(vt596_smba & 0x1)) {
smb_cf_hstcfg = 0x84;
} else {
/* no matches at all */
dev_err(&pdev->dev, "Cannot configure "
"SMBus I/O Base address\n");
return -ENODEV;
}
}
vt596_smba &= 0xfff0;
if (vt596_smba == 0) {
dev_err(&pdev->dev, "SMBus base address "
"uninitialized - upgrade BIOS or use "
"force_addr=0xaddr\n");
return -ENODEV;
}
found:
if (!request_region(vt596_smba, 8, "viapro-smbus")) {
dev_err(&pdev->dev, "SMBus region 0x%x already in use!\n",
vt596_smba);
return -ENODEV;
}
pci_read_config_byte(pdev, SMBHSTCFG, &temp);
/* If force_addr is set, we program the new address here. Just to make
sure, we disable the VT596 first. */
if (force_addr) {
pci_write_config_byte(pdev, SMBHSTCFG, temp & 0xfe);
pci_write_config_word(pdev, id->driver_data, vt596_smba);
pci_write_config_byte(pdev, SMBHSTCFG, temp | 0x01);
dev_warn(&pdev->dev, "WARNING: SMBus interface set to new "
"address 0x%04x!\n", vt596_smba);
} else if ((temp & 1) == 0) {
if (force) {
/* NOTE: This assumes I/O space and other allocations
* WERE done by the Bios! Don't complain if your
* hardware does weird things after enabling this.
* :') Check for Bios updates before resorting to
* this.
*/
pci_write_config_byte(pdev, SMBHSTCFG, temp | 1);
dev_info(&pdev->dev, "Enabling SMBus device\n");
} else {
dev_err(&pdev->dev, "SMBUS: Error: Host SMBus "
"controller not enabled! - upgrade BIOS or "
"use force=1\n");
goto release_region;
}
}
if ((temp & 0x0E) == 8)
dev_dbg(&pdev->dev, "using Interrupt 9 for SMBus.\n");
else if ((temp & 0x0E) == 0)
dev_dbg(&pdev->dev, "using Interrupt SMI# for SMBus.\n");
else
dev_dbg(&pdev->dev, "Illegal Interrupt configuration "
"(or code out of date)!\n");
pci_read_config_byte(pdev, SMBREV, &temp);
dev_dbg(&pdev->dev, "SMBREV = 0x%X\n", temp);
dev_dbg(&pdev->dev, "VT596_smba = 0x%X\n", vt596_smba);
vt596_adapter.dev.parent = &pdev->dev;
snprintf(vt596_adapter.dev.name, DEVICE_NAME_SIZE,
"SMBus Via Pro adapter at %04x", vt596_smba);
return i2c_add_adapter(&vt596_adapter);
release_region:
release_region(vt596_smba, 8);
return error;
}
static void __devexit vt596_remove(struct pci_dev *pdev)
{
i2c_del_adapter(&vt596_adapter);
release_region(vt596_smba, 8);
}
static struct pci_device_id vt596_ids[] __devinitdata = {
{
......@@ -451,29 +453,6 @@ static struct pci_device_id vt596_ids[] __devinitdata = {
{ 0, }
};
static int __devinit vt596_probe(struct pci_dev *dev, const struct pci_device_id *id)
{
int retval;
retval = vt596_setup(dev, id);
if (retval)
return retval;
vt596_adapter.dev.parent = &dev->dev;
snprintf(vt596_adapter.dev.name, DEVICE_NAME_SIZE,
"SMBus Via Pro adapter at %04x", vt596_smba);
retval = i2c_add_adapter(&vt596_adapter);
return retval;
}
static void __devexit vt596_remove(struct pci_dev *dev)
{
i2c_del_adapter(&vt596_adapter);
}
static struct pci_driver vt596_driver = {
.name = "vt596 smbus",
.id_table = vt596_ids,
......@@ -490,14 +469,12 @@ static int __init i2c_vt596_init(void)
static void __exit i2c_vt596_exit(void)
{
pci_unregister_driver(&vt596_driver);
release_region(vt596_smba, 8);
}
MODULE_AUTHOR("Frodo Looijaard <frodol@dds.nl> and Philip Edelbrock <phil@netroedge.com>");
MODULE_AUTHOR(
"Frodo Looijaard <frodol@dds.nl> and "
"Philip Edelbrock <phil@netroedge.com>");
MODULE_DESCRIPTION("vt82c596 SMBus driver");
MODULE_LICENSE("GPL");
module_init(i2c_vt596_init);
......
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