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, const struct v4l2_routing *route)
63 /* There are 2 physical inputs, but the second input can be
64 placed in two modes, the first mode bypasses the PGA (gain),
65 the second goes through the PGA. Hence there are three
66 possible inputs to choose from. */
67 if (route->input > 2) {
68 v4l2_err(sd, "Invalid input %d.\n", route->input);
71 cs53l32a_write(sd, 0x01, 0x01 + (route->input << 4));
75 static int cs53l32a_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
77 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
78 ctrl->value = (cs53l32a_read(sd, 0x03) & 0xc0) != 0;
81 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
83 ctrl->value = (s8)cs53l32a_read(sd, 0x04);
87 static int cs53l32a_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl)
89 if (ctrl->id == V4L2_CID_AUDIO_MUTE) {
90 cs53l32a_write(sd, 0x03, ctrl->value ? 0xf0 : 0x30);
93 if (ctrl->id != V4L2_CID_AUDIO_VOLUME)
95 if (ctrl->value > 12 || ctrl->value < -96)
97 cs53l32a_write(sd, 0x04, (u8) ctrl->value);
98 cs53l32a_write(sd, 0x05, (u8) ctrl->value);
102 static int cs53l32a_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
104 struct i2c_client *client = v4l2_get_subdevdata(sd);
106 return v4l2_chip_ident_i2c_client(client,
107 chip, V4L2_IDENT_CS53l32A, 0);
110 static int cs53l32a_log_status(struct v4l2_subdev *sd)
112 u8 v = cs53l32a_read(sd, 0x01);
113 u8 m = cs53l32a_read(sd, 0x03);
114 s8 vol = cs53l32a_read(sd, 0x04);
116 v4l2_info(sd, "Input: %d%s\n", (v >> 4) & 3,
117 (m & 0xC0) ? " (muted)" : "");
118 v4l2_info(sd, "Volume: %d dB\n", vol);
122 /* ----------------------------------------------------------------------- */
124 static const struct v4l2_subdev_core_ops cs53l32a_core_ops = {
125 .log_status = cs53l32a_log_status,
126 .g_chip_ident = cs53l32a_g_chip_ident,
127 .g_ctrl = cs53l32a_g_ctrl,
128 .s_ctrl = cs53l32a_s_ctrl,
131 static const struct v4l2_subdev_audio_ops cs53l32a_audio_ops = {
132 .s_routing = cs53l32a_s_routing,
135 static const struct v4l2_subdev_ops cs53l32a_ops = {
136 .core = &cs53l32a_core_ops,
137 .audio = &cs53l32a_audio_ops,
140 /* ----------------------------------------------------------------------- */
142 /* i2c implementation */
146 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
149 static int cs53l32a_probe(struct i2c_client *client,
150 const struct i2c_device_id *id)
152 struct v4l2_subdev *sd;
155 /* Check if the adapter supports the needed features */
156 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
160 strlcpy(client->name, "cs53l32a", sizeof(client->name));
162 v4l_info(client, "chip found @ 0x%x (%s)\n",
163 client->addr << 1, client->adapter->name);
165 sd = kmalloc(sizeof(struct v4l2_subdev), GFP_KERNEL);
168 v4l2_i2c_subdev_init(sd, client, &cs53l32a_ops);
170 for (i = 1; i <= 7; i++) {
171 u8 v = cs53l32a_read(sd, i);
173 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
176 /* Set cs53l32a internal register for Adaptec 2010/2410 setup */
178 cs53l32a_write(sd, 0x01, (u8) 0x21);
179 cs53l32a_write(sd, 0x02, (u8) 0x29);
180 cs53l32a_write(sd, 0x03, (u8) 0x30);
181 cs53l32a_write(sd, 0x04, (u8) 0x00);
182 cs53l32a_write(sd, 0x05, (u8) 0x00);
183 cs53l32a_write(sd, 0x06, (u8) 0x00);
184 cs53l32a_write(sd, 0x07, (u8) 0x00);
186 /* Display results, should be 0x21,0x29,0x30,0x00,0x00,0x00,0x00 */
188 for (i = 1; i <= 7; i++) {
189 u8 v = cs53l32a_read(sd, i);
191 v4l2_dbg(1, debug, sd, "Read Reg %d %02x\n", i, v);
196 static int cs53l32a_remove(struct i2c_client *client)
198 struct v4l2_subdev *sd = i2c_get_clientdata(client);
200 v4l2_device_unregister_subdev(sd);
205 static const struct i2c_device_id cs53l32a_id[] = {
209 MODULE_DEVICE_TABLE(i2c, cs53l32a_id);
211 static struct v4l2_i2c_driver_data v4l2_i2c_data = {
213 .remove = cs53l32a_remove,
214 .probe = cs53l32a_probe,
215 .id_table = cs53l32a_id,