2 * cs53l32a (Adaptec AVC-2010 and AVC-2410) i2c ivtv driver.
3 * Copyright (C) 2005 Martin Vaughan
5 * Audio source switching for Adaptec AVC-2410 added by Trev Jackson
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.
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.
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.
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/v4l2-common.h>
32 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
33 MODULE_AUTHOR("Martin Vaughan");
34 MODULE_LICENSE("GPL");
38 module_param(debug, bool, 0644);
40 MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
42 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
47 /* ----------------------------------------------------------------------- */
49 static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
51 return i2c_smbus_write_byte_data(client, reg, value);
54 static int cs53l32a_read(struct i2c_client *client, u8 reg)
56 return i2c_smbus_read_byte_data(client, reg);
59 static int cs53l32a_command(struct i2c_client *client, unsigned int cmd,
62 struct v4l2_audio *input = arg;
63 struct v4l2_control *ctrl = arg;
67 /* There are 2 physical inputs, but the second input can be
68 placed in two modes, the first mode bypasses the PGA (gain),
69 the second goes through the PGA. Hence there are three
70 possible inputs to choose from. */
71 if (input->index > 2) {
72 v4l_err(client, "Invalid input %d.\n", input->index);
75 cs53l32a_write(client, 0x01, 0x01 + (input->index << 4));
79 memset(input, 0, sizeof(*input));
80 input->index = (cs53l32a_read(client, 0x01) >> 4) & 3;
84 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
85 ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0;
88 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
90 ctrl->value = (s8)cs53l32a_read(client, 0x04);
94 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
95 cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30);
98 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
100 if (ctrl->value > 12 || ctrl->value < -96)
102 cs53l32a_write(client, 0x04, (u8) ctrl->value);
103 cs53l32a_write(client, 0x05, (u8) ctrl->value);
106 case VIDIOC_LOG_STATUS:
108 u8 v = cs53l32a_read(client, 0x01);
109 u8 m = cs53l32a_read(client, 0x03);
110 s8 vol = cs53l32a_read(client, 0x04);
112 v4l_info(client, "Input: %d%s\n", (v >> 4) & 3,
113 (m & 0xC0) ? " (muted)" : "");
114 v4l_info(client, "Volume: %d dB\n", vol);
124 /* ----------------------------------------------------------------------- */
126 /* i2c implementation */
130 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
133 static struct i2c_driver i2c_driver;
135 static int cs53l32a_attach(struct i2c_adapter *adapter, int address, int kind)
137 struct i2c_client *client;
140 /* Check if the adapter supports the needed features */
141 if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
144 client = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
148 memset(client, 0, sizeof(struct i2c_client));
149 client->addr = address;
150 client->adapter = adapter;
151 client->driver = &i2c_driver;
152 snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
154 v4l_info(client, "chip found @ 0x%x (%s)\n", address << 1, adapter->name);
156 for (i = 1; i <= 7; i++) {
157 u8 v = cs53l32a_read(client, i);
159 v4l_dbg(1, client, "Read Reg %d %02x\n", i, v);
162 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
164 cs53l32a_write(client, 0x01, (u8) 0x21);
165 cs53l32a_write(client, 0x02, (u8) 0x29);
166 cs53l32a_write(client, 0x03, (u8) 0x30);
167 cs53l32a_write(client, 0x04, (u8) 0x00);
168 cs53l32a_write(client, 0x05, (u8) 0x00);
169 cs53l32a_write(client, 0x06, (u8) 0x00);
170 cs53l32a_write(client, 0x07, (u8) 0x00);
172 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
174 for (i = 1; i <= 7; i++) {
175 u8 v = cs53l32a_read(client, i);
177 v4l_dbg(1, client, "Read Reg %d %02x\n", i, v);
180 i2c_attach_client(client);
185 static int cs53l32a_probe(struct i2c_adapter *adapter)
187 if (adapter->class & I2C_CLASS_TV_ANALOG)
188 return i2c_probe(adapter, &addr_data, cs53l32a_attach);
192 static int cs53l32a_detach(struct i2c_client *client)
196 err = i2c_detach_client(client);
205 /* ----------------------------------------------------------------------- */
207 /* i2c implementation */
208 static struct i2c_driver i2c_driver = {
212 .id = I2C_DRIVERID_CS53L32A,
213 .attach_adapter = cs53l32a_probe,
214 .detach_client = cs53l32a_detach,
215 .command = cs53l32a_command,
219 static int __init cs53l32a_init_module(void)
221 return i2c_add_driver(&i2c_driver);
224 static void __exit cs53l32a_cleanup_module(void)
226 i2c_del_driver(&i2c_driver);
229 module_init(cs53l32a_init_module);
230 module_exit(cs53l32a_cleanup_module);