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/videodev2.h>
30 #include <media/v4l2-device.h>
31 #include <media/v4l2-chip-ident.h>
32 #include <media/v4l2-i2c-drv.h>
34 MODULE_DESCRIPTION("i2c device driver for cs53l32a Audio ADC");
35 MODULE_AUTHOR("Martin Vaughan");
36 MODULE_LICENSE("GPL");
40 module_param(debug, bool, 0644);
42 MODULE_PARM_DESC(debug, "Debugging messages, 0=Off (default), 1=On");
45 /* ----------------------------------------------------------------------- */
47 static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)
49 struct i2c_client *client = v4l2_get_subdevdata(sd);
51 return i2c_smbus_write_byte_data(client, reg, value);
54 static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg)
56 struct i2c_client *client = v4l2_get_subdevdata(sd);
58 return i2c_smbus_read_byte_data(client, reg);
61 static int cs53l32a_s_routing(struct v4l2_subdev *sd,
62 u32 input, u32 output, u32 config)
64 /* There are 2 physical inputs, but the second input can be
65 placed in two modes, the first mode bypasses the PGA (gain),
66 the second goes through the PGA. Hence there are three
67 possible inputs to choose from. */
69 v4l2_err(sd, "Invalid input %d.\n", input);
72 cs53l32a_write(sd, 0x01, 0x01 + (input << 4));
76 static int cs53l32a_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
78 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
79 ctrl->value = (cs53l32a_read(sd, 0x03) & 0xc0) != 0;
82 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
84 ctrl->value = (s8)cs53l32a_read(sd, 0x04);
88 static int cs53l32a_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
90 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
91 cs53l32a_write(sd, 0x03, ctrl->value ? 0xf0 : 0x30);
94 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
96 if (ctrl->value > 12 || ctrl->value < -96)
98 cs53l32a_write(sd, 0x04, (u8) ctrl->value);
99 cs53l32a_write(sd, 0x05, (u8) ctrl->value);
103 static int cs53l32a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
105 struct i2c_client *client = v4l2_get_subdevdata(sd);
107 return v4l2_chip_ident_i2c_client(client,
108 chip, V4L2_IDENT_CS53l32A, 0);
111 static int cs53l32a_log_status(struct v4l2_subdev *sd)
113 u8 v = cs53l32a_read(sd, 0x01);
114 u8 m = cs53l32a_read(sd, 0x03);
115 s8 vol = cs53l32a_read(sd, 0x04);
117 v4l2_info(sd, "Input: %d%s\n", (v >> 4) & 3,
118 (m & 0xC0) ? " (muted)" : "");
119 v4l2_info(sd, "Volume: %d dB\n", vol);
123 /* ----------------------------------------------------------------------- */
125 static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
126 .log_status = cs53l32a_log_status,
127 .g_chip_ident = cs53l32a_g_chip_ident,
128 .g_ctrl = cs53l32a_g_ctrl,
129 .s_ctrl = cs53l32a_s_ctrl,
132 static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
133 .s_routing = cs53l32a_s_routing,
136 static const struct v4l2_subdev_ops cs53l32a_ops = {
137 .core = &cs53l32a_core_ops,
138 .audio = &cs53l32a_audio_ops,
141 /* ----------------------------------------------------------------------- */
143 /* i2c implementation */
147 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
150 static int cs53l32a_probe(struct i2c_client *client,
151 const struct i2c_device_id *id)
153 struct v4l2_subdev *sd;
156 /* Check if the adapter supports the needed features */
157 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
161 strlcpy(client->name, "cs53l32a", sizeof(client->name));
163 v4l_info(client, "chip found @ 0x%x (%s)\n",
164 client->addr << 1, client->adapter->name);
166 sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
169 v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
171 for (i = 1; i <= 7; i++) {
172 u8 v = cs53l32a_read(sd, i);
174 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
177 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
179 cs53l32a_write(sd, 0x01, (u8) 0x21);
180 cs53l32a_write(sd, 0x02, (u8) 0x29);
181 cs53l32a_write(sd, 0x03, (u8) 0x30);
182 cs53l32a_write(sd, 0x04, (u8) 0x00);
183 cs53l32a_write(sd, 0x05, (u8) 0x00);
184 cs53l32a_write(sd, 0x06, (u8) 0x00);
185 cs53l32a_write(sd, 0x07, (u8) 0x00);
187 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
189 for (i = 1; i <= 7; i++) {
190 u8 v = cs53l32a_read(sd, i);
192 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
197 static int cs53l32a_remove(struct i2c_client *client)
199 struct v4l2_subdev *sd = i2c_get_clientdata(client);
201 v4l2_device_unregister_subdev(sd);
206 static const struct i2c_device_id cs53l32a_id[] = {
210 MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
212 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
214 .remove = cs53l32a_remove,
215 .probe = cs53l32a_probe,
216 .id_table = cs53l32a_id,