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db8a6956 MK |
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 | ||
7d58d111 CP |
49 | static inline int tuner_i2c_xfer_send_recv(struct tuner_i2c_props *props, |
50 | char *obuf, int olen, | |
51 | char *ibuf, int ilen) | |
52 | { | |
53 | struct i2c_msg msg[2] = { { .addr = props->addr, .flags = 0, | |
54 | .buf = obuf, .len = olen }, | |
55 | { .addr = props->addr, .flags = I2C_M_RD, | |
56 | .buf = ibuf, .len = ilen } }; | |
57 | int ret = i2c_transfer(props->adap, msg, 2); | |
58 | ||
59 | return (ret == 2) ? ilen : ret; | |
60 | } | |
61 | ||
98883cdc MCC |
62 | #define tuner_warn(fmt, arg...) do { \ |
63 | printk(KERN_WARNING "%s %d-%04x: " fmt, PREFIX, \ | |
64 | i2c_adapter_id(priv->i2c_props.adap), \ | |
65 | priv->i2c_props.addr, ##arg); \ | |
66 | } while (0) | |
67 | ||
68 | #define tuner_info(fmt, arg...) do { \ | |
69 | printk(KERN_INFO "%s %d-%04x: " fmt, PREFIX, \ | |
70 | i2c_adapter_id(priv->i2c_props.adap), \ | |
71 | priv->i2c_props.addr , ##arg); \ | |
72 | } while (0) | |
73 | ||
74 | #define tuner_err(fmt, arg...) do { \ | |
75 | printk(KERN_ERR "%s %d-%04x: " fmt, PREFIX, \ | |
76 | i2c_adapter_id(priv->i2c_props.adap), \ | |
77 | priv->i2c_props.addr , ##arg); \ | |
78 | } while (0) | |
79 | ||
80 | #define tuner_dbg(fmt, arg...) do { \ | |
81 | if ((debug)) \ | |
82 | printk(KERN_DEBUG "%s %d-%04x: " fmt, PREFIX, \ | |
83 | i2c_adapter_id(priv->i2c_props.adap), \ | |
84 | priv->i2c_props.addr , ##arg); \ | |
85 | } while (0) | |
db8a6956 MK |
86 | |
87 | #endif /* __TUNER_I2C_H__ */ |