| Michael Krufky | db8a695 | 2007-08-21 01:24:42 -0300 | [diff] [blame^] | 1 | /* |
| 2 | tuner-i2c.h - i2c interface for different tuners |
| 3 | |
| 4 | Copyright (C) 2007 Michael Krufky (mkrufky@linuxtv.org) |
| 5 | |
| 6 | This program is free software; you can redistribute it and/or modify |
| 7 | it under the terms of the GNU General Public License as published by |
| 8 | the Free Software Foundation; either version 2 of the License, or |
| 9 | (at your option) any later version. |
| 10 | |
| 11 | This program is distributed in the hope that it will be useful, |
| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | GNU General Public License for more details. |
| 15 | |
| 16 | You should have received a copy of the GNU General Public License |
| 17 | along with this program; if not, write to the Free Software |
| 18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 19 | */ |
| 20 | |
| 21 | #ifndef __TUNER_I2C_H__ |
| 22 | #define __TUNER_I2C_H__ |
| 23 | |
| 24 | #include <linux/i2c.h> |
| 25 | |
| 26 | struct tuner_i2c_props { |
| 27 | u8 addr; |
| 28 | struct i2c_adapter *adap; |
| 29 | }; |
| 30 | |
| 31 | static inline int tuner_i2c_xfer_send(struct tuner_i2c_props *props, char *buf, int len) |
| 32 | { |
| 33 | struct i2c_msg msg = { .addr = props->addr, .flags = 0, |
| 34 | .buf = buf, .len = len }; |
| 35 | int ret = i2c_transfer(props->adap, &msg, 1); |
| 36 | |
| 37 | return (ret == 1) ? len : ret; |
| 38 | } |
| 39 | |
| 40 | static inline int tuner_i2c_xfer_recv(struct tuner_i2c_props *props, char *buf, int len) |
| 41 | { |
| 42 | struct i2c_msg msg = { .addr = props->addr, .flags = I2C_M_RD, |
| 43 | .buf = buf, .len = len }; |
| 44 | int ret = i2c_transfer(props->adap, &msg, 1); |
| 45 | |
| 46 | return (ret == 1) ? len : ret; |
| 47 | } |
| 48 | |
| 49 | #ifndef __TUNER_DRIVER_H__ |
| 50 | #define tuner_warn(fmt, arg...) do {\ |
| 51 | printk(KERN_WARNING PREFIX "%d-%04x: " fmt, \ |
| 52 | i2c_adapter_id(priv->i2c_props.adap), priv->i2c_props.addr , ##arg); } while (0) |
| 53 | #define tuner_info(fmt, arg...) do {\ |
| 54 | printk(KERN_INFO PREFIX "%d-%04x: " fmt, \ |
| 55 | i2c_adapter_id(priv->i2c_props.adap), priv->i2c_props.addr , ##arg); } while (0) |
| 56 | #define tuner_dbg(fmt, arg...) do {\ |
| 57 | if ((debug)) \ |
| 58 | printk(KERN_DEBUG PREFIX "%d-%04x: " fmt, \ |
| 59 | i2c_adapter_id(priv->i2c_props.adap), priv->i2c_props.addr , ##arg); } while (0) |
| 60 | #endif /* __TUNER_DRIVER_H__ */ |
| 61 | |
| 62 | #endif /* __TUNER_I2C_H__ */ |
| 63 | |
| 64 | /* |
| 65 | * Overrides for Emacs so that we follow Linus's tabbing style. |
| 66 | * --------------------------------------------------------------------------- |
| 67 | * Local variables: |
| 68 | * c-basic-offset: 8 |
| 69 | * End: |
| 70 | */ |