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>
diff --git a/drivers/i2c/busses/i2c-viapro.c b/drivers/i2c/busses/i2c-viapro.c
index 1345da9..73dc52e 100644
--- a/drivers/i2c/busses/i2c-viapro.c
+++ b/drivers/i2c/busses/i2c-viapro.c
@@ -83,6 +83,7 @@
#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 @@
}
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 @@
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 @@
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 @@
{
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;