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Commit a05f2c5a authored by Prakash Mortha's avatar Prakash Mortha Committed by Jean Delvare
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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: default avatarPrakash Mortha <pmortha@escient.com>
Signed-off-by: default avatarJean Delvare <khali@linux-fr.org>
parent 596c88f4

drivers/i2c/busses/i2c-viapro.c

+12 −1
Original line number Original line Diff line number Diff line
@@ -83,6 +83,7 @@ static unsigned short SMBHSTCFG = 0xD2; 
#define VT596_BYTE		0x04

#define VT596_BYTE		0x04

#define VT596_BYTE_DATA		0x08

#define VT596_BYTE_DATA		0x08

#define VT596_WORD_DATA		0x0C

#define VT596_WORD_DATA		0x0C

#define VT596_PROC_CALL		0x10

#define VT596_BLOCK_DATA	0x14

#define VT596_BLOCK_DATA	0x14

#define VT596_I2C_BLOCK_DATA	0x34

#define VT596_I2C_BLOCK_DATA	0x34
@@ -233,6 +234,12 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, 
		}

		}

		size = VT596_WORD_DATA;

		size = VT596_WORD_DATA;

		break;

		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:

	case I2C_SMBUS_I2C_BLOCK_DATA:

		if (!(vt596_features & FEATURE_I2CBLOCK))

		if (!(vt596_features & FEATURE_I2CBLOCK))

			goto exit_unsupported;

			goto exit_unsupported;
@@ -263,6 +270,9 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, 
	if (status)

	if (status)

		return status;

		return status;





	if (size == VT596_PROC_CALL)

		read_write = I2C_SMBUS_READ;



	if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))

	if ((read_write == I2C_SMBUS_WRITE) || (size == VT596_QUICK))

		return 0;

		return 0;
@@ -272,6 +282,7 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr, 
		data->byte = inb_p(SMBHSTDAT0);

		data->byte = inb_p(SMBHSTDAT0);

		break;

		break;

	case VT596_WORD_DATA:

	case VT596_WORD_DATA:

	case VT596_PROC_CALL:

		data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);

		data->word = inb_p(SMBHSTDAT0) + (inb_p(SMBHSTDAT1) << 8);

		break;

		break;

	case VT596_I2C_BLOCK_DATA:

	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 |

	u32 func = I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |

	    I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |

	    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)

	if (vt596_features & FEATURE_I2CBLOCK)

		func |= I2C_FUNC_SMBUS_I2C_BLOCK;

		func |= I2C_FUNC_SMBUS_I2C_BLOCK;