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>
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@ -83,6 +83,7 @@ static unsigned short SMBHSTCFG = 0xD2;
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#define VT596_BYTE 0x04
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#define VT596_BYTE_DATA 0x08
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#define VT596_WORD_DATA 0x0C
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#define VT596_PROC_CALL 0x10
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#define VT596_BLOCK_DATA 0x14
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#define VT596_I2C_BLOCK_DATA 0x34
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@ -233,6 +234,12 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
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}
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size = VT596_WORD_DATA;
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break;
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case I2C_SMBUS_PROC_CALL:
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outb_p(command, SMBHSTCMD);
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outb_p(data->word & 0xff, SMBHSTDAT0);
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outb_p((data->word & 0xff00) >> 8, SMBHSTDAT1);
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size = VT596_PROC_CALL;
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break;
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case I2C_SMBUS_I2C_BLOCK_DATA:
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if (!(vt596_features & FEATURE_I2CBLOCK))
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goto exit_unsupported;
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@ -263,6 +270,9 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
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if (status)
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return status;
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if (size == VT596_PROC_CALL)
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read_write = I2C_SMBUS_READ;
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if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))
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return 0;
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@ -272,6 +282,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
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data->byte = inb_p(SMBHSTDAT0);
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break;
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case VT596_WORD_DATA:
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case VT596_PROC_CALL:
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data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);
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break;
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case VT596_I2C_BLOCK_DATA:
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@ -296,7 +307,7 @@ static u32 vt596_func(struct i2c_adapter *adapter)
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{
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u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
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I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
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I2C_FUNC_SMBUS_BLOCK_DATA;
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I2C_SMBUS_PROC_CALL | I2C_FUNC_SMBUS_BLOCK_DATA;
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if (vt596_features & FEATURE_I2CBLOCK)
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func |= I2C_FUNC_SMBUS_I2C_BLOCK;
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