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-legacy.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");
44 static unsigned short normal_i2c[] = { 0x22 >> 1, I2C_CLIENT_END };
48 /* ----------------------------------------------------------------------- */
50 static int cs53l32a_write(struct v4l2_subdev *sd, u8 reg, u8 value)
52 struct i2c_client *client = v4l2_get_subdevdata(sd);
54 return i2c_smbus_write_byte_data(client, reg, value);
57 static int cs53l32a_read(struct v4l2_subdev *sd, u8 reg)
59 struct i2c_client *client = v4l2_get_subdevdata(sd);
61 return i2c_smbus_read_byte_data(client, reg);
64 static int cs53l32a_s_routing(struct v4l2_subdev *sd, const struct v4l2_routing *route)
66 /* There are 2 physical inputs, but the second input can be
67 placed in two modes, the first mode bypasses the PGA (gain),
68 the second goes through the PGA. Hence there are three
69 possible inputs to choose from. */
70 if (route->input > 2) {
71 v4l2_err(sd, "Invalid input %d.\n", route->input);
74 cs53l32a_write(sd, 0x01, 0x01 + (route->input << 4));
78 static int cs53l32a_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
80 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
81 ctrl->value = (cs53l32a_read(sd, 0x03) & 0xc0) != 0;
84 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
86 ctrl->value = (s8)cs53l32a_read(sd, 0x04);
90 static int cs53l32a_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
92 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
93 cs53l32a_write(sd, 0x03, ctrl->value ? 0xf0 : 0x30);
96 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
98 if (ctrl->value > 12 || ctrl->value < -96)
100 cs53l32a_write(sd, 0x04, (u8) ctrl->value);
101 cs53l32a_write(sd, 0x05, (u8) ctrl->value);
105 static int cs53l32a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
107 struct i2c_client *client = v4l2_get_subdevdata(sd);
109 return v4l2_chip_ident_i2c_client(client,
110 chip, V4L2_IDENT_CS53l32A, 0);
113 static int cs53l32a_log_status(struct v4l2_subdev *sd)
115 u8 v = cs53l32a_read(sd, 0x01);
116 u8 m = cs53l32a_read(sd, 0x03);
117 s8 vol = cs53l32a_read(sd, 0x04);
119 v4l2_info(sd, "Input: %d%s\n", (v >> 4) & 3,
120 (m & 0xC0) ? " (muted)" : "");
121 v4l2_info(sd, "Volume: %d dB\n", vol);
125 static int cs53l32a_command(struct i2c_client *client, unsigned cmd, void *arg)
127 return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg);
130 /* ----------------------------------------------------------------------- */
132 static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
133 .log_status = cs53l32a_log_status,
134 .g_chip_ident = cs53l32a_g_chip_ident,
135 .g_ctrl = cs53l32a_g_ctrl,
136 .s_ctrl = cs53l32a_s_ctrl,
139 static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
140 .s_routing = cs53l32a_s_routing,
143 static const struct v4l2_subdev_ops cs53l32a_ops = {
144 .core = &cs53l32a_core_ops,
145 .audio = &cs53l32a_audio_ops,
148 /* ----------------------------------------------------------------------- */
150 /* i2c implementation */
154 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
157 static int cs53l32a_probe(struct i2c_client *client,
158 const struct i2c_device_id *id)
160 struct v4l2_subdev *sd;
163 /* Check if the adapter supports the needed features */
164 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
168 strlcpy(client->name, "cs53l32a", sizeof(client->name));
170 v4l_info(client, "chip found @ 0x%x (%s)\n",
171 client->addr << 1, client->adapter->name);
173 sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
176 v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
178 for (i = 1; i <= 7; i++) {
179 u8 v = cs53l32a_read(sd, i);
181 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
184 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
186 cs53l32a_write(sd, 0x01, (u8) 0x21);
187 cs53l32a_write(sd, 0x02, (u8) 0x29);
188 cs53l32a_write(sd, 0x03, (u8) 0x30);
189 cs53l32a_write(sd, 0x04, (u8) 0x00);
190 cs53l32a_write(sd, 0x05, (u8) 0x00);
191 cs53l32a_write(sd, 0x06, (u8) 0x00);
192 cs53l32a_write(sd, 0x07, (u8) 0x00);
194 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
196 for (i = 1; i <= 7; i++) {
197 u8 v = cs53l32a_read(sd, i);
199 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
204 static int cs53l32a_remove(struct i2c_client *client)
206 struct v4l2_subdev *sd = i2c_get_clientdata(client);
208 v4l2_device_unregister_subdev(sd);
213 static const struct i2c_device_id cs53l32a_id[] = {
217 MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
219 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
221 .command = cs53l32a_command,
222 .remove = cs53l32a_remove,
223 .probe = cs53l32a_probe,
224 .id_table = cs53l32a_id,