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Hans Verkuilf4067fd2005-11-08 21:37:55 -08001/*
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>
Hans Verkuile2998e12005-11-08 21:38:49 -080028#include <linux/i2c-id.h>
Hans Verkuilf4067fd2005-11-08 21:37:55 -080029#include <linux/videodev.h>
Hans Verkuilfac9e892006-01-09 15:32:40 -020030#include <media/v4l2-common.h>
Hans Verkuil74cab312007-04-27 12:31:26 -030031#include <media/v4l2-chip-ident.h>
Hans Verkuile8e6b992007-09-13 11:30:38 -030032#include <media/v4l2-i2c-drv-legacy.h>
Hans Verkuilf4067fd2005-11-08 21:37:55 -080033
34MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
35MODULE_AUTHOR("Martin Vaughan");
36MODULE_LICENSE("GPL");
37
38static int debug = 0;
39
40module_param(debug, bool, 0644);
41
42MODULE_PARM_DESC(debug, "Debugging messages\n\t\t\t0=Off (default), 1=On");
43
Hans Verkuilf4067fd2005-11-08 21:37:55 -080044static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
45
46
47I2C_CLIENT_INSMOD;
48
49/* ----------------------------------------------------------------------- */
50
51static int cs53l32a_write(struct i2c_client *client, u8 reg, u8 value)
52{
53 return i2c_smbus_write_byte_data(client, reg, value);
54}
55
56static int cs53l32a_read(struct i2c_client *client, u8 reg)
57{
58 return i2c_smbus_read_byte_data(client, reg);
59}
60
Hans Verkuile8e6b992007-09-13 11:30:38 -030061static int cs53l32a_command(struct i2c_client *client, unsigned int cmd, void *arg)
Hans Verkuilf4067fd2005-11-08 21:37:55 -080062{
Hans Verkuil7fa033b2006-03-23 20:12:26 -030063 struct v4l2_routing *route = arg;
Hans Verkuil93605352006-01-09 15:25:39 -020064 struct v4l2_control *ctrl = arg;
Hans Verkuilf4067fd2005-11-08 21:37:55 -080065
66 switch (cmd) {
Hans Verkuil7fa033b2006-03-23 20:12:26 -030067 case VIDIOC_INT_G_AUDIO_ROUTING:
68 route->input = (cs53l32a_read(client, 0x01) >> 4) & 3;
69 route->output = 0;
70 break;
71
72 case VIDIOC_INT_S_AUDIO_ROUTING:
Hans Verkuil93605352006-01-09 15:25:39 -020073 /* There are 2 physical inputs, but the second input can be
74 placed in two modes, the first mode bypasses the PGA (gain),
75 the second goes through the PGA. Hence there are three
76 possible inputs to choose from. */
Hans Verkuil7fa033b2006-03-23 20:12:26 -030077 if (route->input > 2) {
78 v4l_err(client, "Invalid input %d.\n", route->input);
Hans Verkuilf4067fd2005-11-08 21:37:55 -080079 return -EINVAL;
80 }
Hans Verkuil7fa033b2006-03-23 20:12:26 -030081 cs53l32a_write(client, 0x01, 0x01 + (route->input << 4));
Hans Verkuil93605352006-01-09 15:25:39 -020082 break;
83
Hans Verkuil93605352006-01-09 15:25:39 -020084 case VIDIOC_G_CTRL:
85 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
86 ctrl->value = (cs53l32a_read(client, 0x03) & 0xc0) != 0;
87 break;
88 }
89 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
90 return -EINVAL;
91 ctrl->value = (s8)cs53l32a_read(client, 0x04);
Hans Verkuilf4067fd2005-11-08 21:37:55 -080092 break;
93
94 case VIDIOC_S_CTRL:
Hans Verkuil93605352006-01-09 15:25:39 -020095 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
96 cs53l32a_write(client, 0x03, ctrl->value ? 0xf0 : 0x30);
Hans Verkuilf4067fd2005-11-08 21:37:55 -080097 break;
98 }
Hans Verkuil93605352006-01-09 15:25:39 -020099 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
100 return -EINVAL;
101 if (ctrl->value > 12 || ctrl->value < -96)
102 return -EINVAL;
103 cs53l32a_write(client, 0x04, (u8) ctrl->value);
104 cs53l32a_write(client, 0x05, (u8) ctrl->value);
105 break;
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800106
Hans Verkuil74cab312007-04-27 12:31:26 -0300107 case VIDIOC_G_CHIP_IDENT:
108 return v4l2_chip_ident_i2c_client(client, arg, V4L2_IDENT_CS53l32A, 0);
109
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800110 case VIDIOC_LOG_STATUS:
111 {
112 u8 v = cs53l32a_read(client, 0x01);
113 u8 m = cs53l32a_read(client, 0x03);
Hans Verkuil93605352006-01-09 15:25:39 -0200114 s8 vol = cs53l32a_read(client, 0x04);
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800115
Hans Verkuilfac9e892006-01-09 15:32:40 -0200116 v4l_info(client, "Input: %d%s\n", (v >> 4) & 3,
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800117 (m & 0xC0) ? " (muted)" : "");
Hans Verkuilfac9e892006-01-09 15:32:40 -0200118 v4l_info(client, "Volume: %d dB\n", vol);
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800119 break;
120 }
121
122 default:
123 return -EINVAL;
124 }
125 return 0;
126}
127
128/* ----------------------------------------------------------------------- */
129
130/* i2c implementation */
131
132/*
133 * Generic i2c probe
134 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
135 */
136
Hans Verkuile8e6b992007-09-13 11:30:38 -0300137static int cs53l32a_probe(struct i2c_client *client)
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800138{
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800139 int i;
140
141 /* Check if the adapter supports the needed features */
Hans Verkuile8e6b992007-09-13 11:30:38 -0300142 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
Hans Verkuil188f3452007-09-16 10:47:15 -0300143 return -EIO;
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800144
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800145 snprintf(client->name, sizeof(client->name) - 1, "cs53l32a");
146
Hans Verkuile8e6b992007-09-13 11:30:38 -0300147 v4l_info(client, "chip found @ 0x%x (%s)\n", client->addr << 1, client->adapter->name);
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800148
149 for (i = 1; i <= 7; i++) {
150 u8 v = cs53l32a_read(client, i);
151
Mauro Carvalho Chehabf167cb4e2006-01-11 19:41:49 -0200152 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800153 }
154
155 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
156
157 cs53l32a_write(client, 0x01, (u8) 0x21);
158 cs53l32a_write(client, 0x02, (u8) 0x29);
159 cs53l32a_write(client, 0x03, (u8) 0x30);
160 cs53l32a_write(client, 0x04, (u8) 0x00);
161 cs53l32a_write(client, 0x05, (u8) 0x00);
162 cs53l32a_write(client, 0x06, (u8) 0x00);
163 cs53l32a_write(client, 0x07, (u8) 0x00);
164
165 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
166
167 for (i = 1; i <= 7; i++) {
168 u8 v = cs53l32a_read(client, i);
169
Mauro Carvalho Chehabf167cb4e2006-01-11 19:41:49 -0200170 v4l_dbg(1, debug, client, "Read Reg %d %02x\n", i, v);
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800171 }
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800172 return 0;
173}
174
Hans Verkuile8e6b992007-09-13 11:30:38 -0300175static struct v4l2_i2c_driver_data v4l2_i2c_data = {
176 .name = "cs53l32a",
177 .driverid = I2C_DRIVERID_CS53L32A,
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800178 .command = cs53l32a_command,
Hans Verkuile8e6b992007-09-13 11:30:38 -0300179 .probe = cs53l32a_probe,
Hans Verkuilf4067fd2005-11-08 21:37:55 -0800180};
181