780b352ec1192c41f4ba6ba7ce15737372f8e2c1
[linux-2.6.git] / drivers / media / video / cs53l32a.c
1 /*
2  * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
3  * Copyright (C) 2005  Martin Vaughan
4  *
5  * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License as published by
9  * the Free Software Foundation; either version 2 of the License, or
10  * (at your option) any later version.
11  *
12  * This program is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  * GNU General Public License for more details.
16  *
17  * You should have received a copy of the GNU General Public License
18  * along with this program; if not, write to the Free Software
19  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20  */
21
22
23 #include <linux/module.h>
24 #include <linux/types.h>
25 #include <linux/ioctl.h>
26 #include <asm/uaccess.h>
27 #include <linux/i2c.h>
28 #include <linux/i2c-id.h>
29 #include <linux/videodev.h>
30 #include <media/audiochip.h>
31
32 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
33 MODULE_AUTHOR("Martin Vaughan");
34 MODULE_LICENSE("GPL");
35
36 static int debug = 0;
37
38 module_param(debug, bool, 0644);
39
40 MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
41
42 #define cs53l32a_dbg(fmt, arg...) \
43         do { \
44                 if (debug) \
45                         printk(KERN_INFO "%s debug %d-%04x: " fmt, client->driver->name, \
46                                i2c_adapter_id(client->adapter), client->addr , ## arg); \
47         } while (0)
48
49 #define cs53l32a_err(fmt, arg...) do { \
50         printk(KERN_ERR "%s %d-%04x: " fmt, client->driver->name, \
51                 i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
52 #define cs53l32a_info(fmt, arg...) do { \
53         printk(KERN_INFO "%s %d-%04x: " fmt, client->driver->name, \
54                 i2c_adapter_id(client->adapter), client->addr , ## arg); } while (0)
55
56 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
57
58
59 I2C_CLIENT_INSMOD;
60
61 /* ----------------------------------------------------------------------- */
62
63 static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
64 {
65         return i2c_smbus_write_byte_data(client, reg, value);
66 }
67
68 static int cs53l32a_read(struct i2c_client *client, u8 reg)
69 {
70         return i2c_smbus_read_byte_data(client, reg);
71 }
72
73 static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
74                             void *arg)
75 {
76         int *input = arg;
77
78         switch (cmd) {
79         case AUDC_SET_INPUT:
80                 switch (*input) {
81                 case AUDIO_TUNER:
82                         cs53l32a_write(client, 0x01, 0x01);
83                         break;
84                 case AUDIO_EXTERN:
85                         cs53l32a_write(client, 0x01, 0x21);
86                         break;
87                 case AUDIO_MUTE:
88                         cs53l32a_write(client, 0x03, 0xF0);
89                         break;
90                 case AUDIO_UNMUTE:
91                         cs53l32a_write(client, 0x03, 0x30);
92                         break;
93                 default:
94                         cs53l32a_err("Invalid input %d.\n", *input);
95                         return -EINVAL;
96                 }
97                 break;
98
99         case VIDIOC_S_CTRL:
100                 {
101                         struct v4l2_control *ctrl = arg;
102
103                         if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
104                                 return -EINVAL;
105                         if (ctrl->value > 12 || ctrl->value < -90)
106                                 return -EINVAL;
107                         cs53l32a_write(client, 0x04, (u8) ctrl->value);
108                         cs53l32a_write(client, 0x05, (u8) ctrl->value);
109                         break;
110                 }
111
112         case VIDIOC_LOG_STATUS:
113                 {
114                         u8 v = cs53l32a_read(client, 0x01);
115                         u8 m = cs53l32a_read(client, 0x03);
116
117                         cs53l32a_info("Input: %s%s\n",
118                                       v == 0x21 ? "external line in" : "tuner",
119                                       (m & 0xC0) ? " (muted)" : "");
120                         break;
121                 }
122
123         default:
124                 return -EINVAL;
125         }
126         return 0;
127 }
128
129 /* ----------------------------------------------------------------------- */
130
131 /* i2c implementation */
132
133 /*
134  * Generic i2c probe
135  * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
136  */
137
138 static struct i2c_driver i2c_driver;
139
140 static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
141 {
142         struct i2c_client *client;
143         int i;
144
145         /* Check if the adapter supports the needed features */
146         if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
147                 return 0;
148
149         client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
150         if (client == 0)
151                 return -ENOMEM;
152
153         memset(client, 0, sizeof(struct i2c_client));
154         client->addr = address;
155         client->adapter = adapter;
156         client->driver = &i2c_driver;
157         client->flags = I2C_CLIENT_ALLOW_USE;
158         snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
159
160         cs53l32a_info("chip found @ 0x%x (%s)\n", address << 1, adapter->name);
161
162         for (i = 1; i <= 7; i++) {
163                 u8 v = cs53l32a_read(client, i);
164
165                 cs53l32a_dbg("Read Reg %d %02x\n", i, v);
166         }
167
168         /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
169
170         cs53l32a_write(client, 0x01, (u8) 0x21);
171         cs53l32a_write(client, 0x02, (u8) 0x29);
172         cs53l32a_write(client, 0x03, (u8) 0x30);
173         cs53l32a_write(client, 0x04, (u8) 0x00);
174         cs53l32a_write(client, 0x05, (u8) 0x00);
175         cs53l32a_write(client, 0x06, (u8) 0x00);
176         cs53l32a_write(client, 0x07, (u8) 0x00);
177
178         /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
179
180         for (i = 1; i <= 7; i++) {
181                 u8 v = cs53l32a_read(client, i);
182
183                 cs53l32a_dbg("Read Reg %d %02x\n", i, v);
184         }
185
186         i2c_attach_client(client);
187
188         return 0;
189 }
190
191 static int cs53l32a_probe(struct i2c_adapter *adapter)
192 {
193 #ifdef I2C_CLASS_TV_ANALOG
194         if (adapter->class & I2C_CLASS_TV_ANALOG)
195 #else
196         if (adapter->id == I2C_HW_B_BT848)
197 #endif
198                 return i2c_probe(adapter, &addr_data, cs53l32a_attach);
199         return 0;
200 }
201
202 static int cs53l32a_detach(struct i2c_client *client)
203 {
204         int err;
205
206         err = i2c_detach_client(client);
207         if (err) {
208                 return err;
209         }
210         kfree(client);
211
212         return 0;
213 }
214
215 /* ----------------------------------------------------------------------- */
216
217 /* i2c implementation */
218 static struct i2c_driver i2c_driver = {
219         .name = "cs53l32a",
220         .id = I2C_DRIVERID_CS53L32A,
221         .flags = I2C_DF_NOTIFY,
222         .attach_adapter = cs53l32a_probe,
223         .detach_client = cs53l32a_detach,
224         .command = cs53l32a_command,
225         .owner = THIS_MODULE,
226 };
227
228
229 static int __init cs53l32a_init_module(void)
230 {
231         return i2c_add_driver(&i2c_driver);
232 }
233
234 static void __exit cs53l32a_cleanup_module(void)
235 {
236         i2c_del_driver(&i2c_driver);
237 }
238
239 module_init(cs53l32a_init_module);
240 module_exit(cs53l32a_cleanup_module);