diff options
| author | Prakash Mortha <pmortha@escient.com> | 2008-10-14 17:30:06 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@mahadeva.delvare> | 2008-10-14 17:30:06 +0200 |
| commit | a05f2c5a2735ee1d68770137fbbfc334d3b9cda9 (patch) | |
| tree | 350d2919a1886a6c510662365d53762d799630a1 /drivers/i2c/busses | |
| parent | 596c88f4601e6245a15ea7619527674abbfdcf92 (diff) | |
i2c-viapro: Add support for SMBus Process Call transactions
Add support for SMBus Process Call transactions. These are combined
word write, word read transactions.
Signed-off-by: Prakash Mortha <pmortha@escient.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/busses')
| -rw-r--r-- | drivers/i2c/busses/i2c-viapro.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c index 1345da97b23..73dc52e114e 100644 --- a/drivers/i2c/busses/i2c-viapro.c +++ b/drivers/i2c/busses/i2c-viapro.c @@ -83,6 +83,7 @@ static unsigned short SMBHSTCFG = 0xD2; #define VT596_BYTE 0x04 #define VT596_BYTE_DATA 0x08 #define VT596_WORD_DATA 0x0C +#define VT596_PROC_CALL 0x10 #define VT596_BLOCK_DATA 0x14 #define VT596_I2C_BLOCK_DATA 0x34 @@ -233,6 +234,12 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, } size = VT596_WORD_DATA; break; + case I2C_SMBUS_PROC_CALL: + outb_p(command, SMBHSTCMD); + outb_p(data->word & 0xff, SMBHSTDAT0); + outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1); + size = VT596_PROC_CALL; + break; case I2C_SMBUS_I2C_BLOCK_DATA: if (!(vt596_features & FEATURE_I2CBLOCK)) goto exit_unsupported; @@ -263,6 +270,9 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, if (status) return status; + if (size == VT596_PROC_CALL) + read_write = I2C_SMBUS_READ; + if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK)) return 0; @@ -272,6 +282,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, data->byte = inb_p(SMBHSTDAT0); break; case VT596_WORD_DATA: + case VT596_PROC_CALL: data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8); break; case VT596_I2C_BLOCK_DATA: @@ -296,7 +307,7 @@ static u32 vt596_func(struct i2c_adapter *adapter) { u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE | I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA | - I2C_FUNC_SMBUS_BLOCK_DATA; + I2C_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA; if (vt596_features & FEATURE_I2CBLOCK) func |= I2C_FUNC_SMBUS_I2C_BLOCK; |