/*
tuner-i2c.h - i2c interface for different tuners
Copyright (C) 2007 Michael Krufky (mkrufky@linuxtv.org)
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __TUNER_I2C_H__
#define __TUNER_I2C_H__
#include <linux/i2c.h>
struct tuner_i2c_props {
u8 addr;
struct i2c_adapter *adap;
};
static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len)
{
struct i2c_msg msg = { .addr = props->addr, .flags = 0,
.buf = buf, .len = len };
int ret = i2c_transfer(props->adap, &msg, 1);
return (ret == 1) ? len : ret;
}
static inline int tuner_i2c_xfer_recv(struct tuner_i2c_props *props, char *buf, int len)
{
struct i2c_msg msg = { .addr = props->addr, .flags = I2C_M_RD,
.buf = buf, .len = len };
int ret = i2c_transfer(props->adap, &msg, 1);
return (ret == 1) ? len : ret;
}
static inline int tuner_i2c_xfer_send_recv(struct tuner_i2c_props *props,
char *obuf, int olen,
char *ibuf, int ilen)
{
struct i2c_msg msg[2] = { { .addr = props->addr, .flags = 0,
.buf = obuf, .len = olen },
{ .addr = props->addr, .flags = I2C_M_RD,
.buf = ibuf, .len = ilen } };
int ret = i2c_transfer(props->adap, msg, 2);
return (ret == 2) ? ilen : ret;
}
#define tuner_warn(fmt, arg...) do { \
printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \
i2c_adapter_id(priv->i2c_props.adap), \
priv->i2c_props.addr, ##arg); \
} while (0)
#define tuner_info(fmt, arg...) do { \
printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \
i2c_adapter_id(priv->i2c_props.adap), \
priv->i2c_props.addr , ##arg); \
} while (0)
#define tuner_err(fmt, arg...) do { \
printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \
i2c_adapter_id(priv->i2c_props.adap), \
priv->i2c_props.addr , ##arg); \
} while (0)
#define tuner_dbg(fmt, arg...) do { \
if ((debug)) \
printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \
i2c_adapter_id(priv->i2c_props.adap), \
priv->i2c_props.addr , ##arg); \
} while (0)
#endif /* __TUNER_I2C_H__ */
