blob: 869f9e7946b6082bb9df221ccc056d13e808e0d9 [file] [log] [blame]
Hans Verkuil0edeea42005-11-08 21:37:25 -08001/*
2 * wm8775 - driver version 0.0.1
3 *
4 * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to>
5 *
6 * Based on saa7115 driver
7 *
Hans Verkuil1f4b3362005-11-13 16:08:05 -08008 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
9 * - Cleanup
10 * - V4L2 API update
11 * - sound fixes
12 *
Hans Verkuil0edeea42005-11-08 21:37:25 -080013 * This program is free software; you can redistribute it and/or modify
14 * it under the terms of the GNU General Public License as published by
15 * the Free Software Foundation; either version 2 of the License, or
16 * (at your option) any later version.
17 *
18 * This program is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21 * GNU General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; if not, write to the Free Software
25 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 */
27
Hans Verkuil0edeea42005-11-08 21:37:25 -080028#include <linux/module.h>
29#include <linux/types.h>
30#include <linux/ioctl.h>
31#include <asm/uaccess.h>
32#include <linux/i2c.h>
Hans Verkuile2998e12005-11-08 21:38:49 -080033#include <linux/i2c-id.h>
Hans Verkuil0edeea42005-11-08 21:37:25 -080034#include <linux/videodev.h>
Hans Verkuilfac9e892006-01-09 15:32:40 -020035#include <media/v4l2-common.h>
Hans Verkuil74cab312007-04-27 12:31:26 -030036#include <media/v4l2-chip-ident.h>
Hans Verkuild9a53aa2007-09-13 11:08:25 -030037#include <media/v4l2-i2c-drv-legacy.h>
Hans Verkuil0edeea42005-11-08 21:37:25 -080038
39MODULE_DESCRIPTION("wm8775 driver");
Hans Verkuil1f4b3362005-11-13 16:08:05 -080040MODULE_AUTHOR("Ulf Eklund, Hans Verkuil");
Hans Verkuil0edeea42005-11-08 21:37:25 -080041MODULE_LICENSE("GPL");
42
Hans Verkuil0edeea42005-11-08 21:37:25 -080043static unsigned short normal_i2c[] = { 0x36 >> 1, I2C_CLIENT_END };
44
45
46I2C_CLIENT_INSMOD;
47
Hans Verkuild9a53aa2007-09-13 11:08:25 -030048
Hans Verkuil0edeea42005-11-08 21:37:25 -080049/* ----------------------------------------------------------------------- */
50
51enum {
52 R7 = 7, R11 = 11,
53 R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R23 = 23,
54 TOT_REGS
55};
56
57struct wm8775_state {
58 u8 input; /* Last selected input (0-0xf) */
59 u8 muted;
60};
61
62static int wm8775_write(struct i2c_client *client, int reg, u16 val)
63{
64 int i;
65
66 if (reg < 0 || reg >= TOT_REGS) {
Hans Verkuilfac9e892006-01-09 15:32:40 -020067 v4l_err(client, "Invalid register R%d\n", reg);
Hans Verkuil0edeea42005-11-08 21:37:25 -080068 return -1;
69 }
70
Hans Verkuil842441d2007-11-01 07:35:41 -030071 for (i = 0; i < 3; i++)
72 if (i2c_smbus_write_byte_data(client,
73 (reg << 1) | (val >> 8), val & 0xff) == 0)
Hans Verkuil0edeea42005-11-08 21:37:25 -080074 return 0;
Hans Verkuilfac9e892006-01-09 15:32:40 -020075 v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg);
Hans Verkuil0edeea42005-11-08 21:37:25 -080076 return -1;
77}
78
Hans Verkuil842441d2007-11-01 07:35:41 -030079static int wm8775_command(struct i2c_client *client, unsigned cmd, void *arg)
Hans Verkuil0edeea42005-11-08 21:37:25 -080080{
81 struct wm8775_state *state = i2c_get_clientdata(client);
Hans Verkuil7fa033b2006-03-23 20:12:26 -030082 struct v4l2_routing *route = arg;
Hans Verkuilfbc46e72006-01-09 15:25:40 -020083 struct v4l2_control *ctrl = arg;
Hans Verkuil0edeea42005-11-08 21:37:25 -080084
85 switch (cmd) {
Hans Verkuil7fa033b2006-03-23 20:12:26 -030086 case VIDIOC_INT_G_AUDIO_ROUTING:
87 route->input = state->input;
88 route->output = 0;
89 break;
90
91 case VIDIOC_INT_S_AUDIO_ROUTING:
Hans Verkuilfbc46e72006-01-09 15:25:40 -020092 /* There are 4 inputs and one output. Zero or more inputs
93 are multiplexed together to the output. Hence there are
94 16 combinations.
95 If only one input is active (the normal case) then the
96 input values 1, 2, 4 or 8 should be used. */
Hans Verkuil7fa033b2006-03-23 20:12:26 -030097 if (route->input > 15) {
98 v4l_err(client, "Invalid input %d.\n", route->input);
Hans Verkuilfbc46e72006-01-09 15:25:40 -020099 return -EINVAL;
100 }
Hans Verkuil7fa033b2006-03-23 20:12:26 -0300101 state->input = route->input;
Hans Verkuilfbc46e72006-01-09 15:25:40 -0200102 if (state->muted)
103 break;
Hans Verkuil0edeea42005-11-08 21:37:25 -0800104 wm8775_write(client, R21, 0x0c0);
105 wm8775_write(client, R14, 0x1d4);
106 wm8775_write(client, R15, 0x1d4);
Hans Verkuilfbc46e72006-01-09 15:25:40 -0200107 wm8775_write(client, R21, 0x100 + state->input);
108 break;
Hans Verkuil0edeea42005-11-08 21:37:25 -0800109
Hans Verkuilfbc46e72006-01-09 15:25:40 -0200110 case VIDIOC_G_CTRL:
111 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
112 return -EINVAL;
113 ctrl->value = state->muted;
114 break;
115
116 case VIDIOC_S_CTRL:
117 if (ctrl->id != V4L2_CID_AUDIO_MUTE)
118 return -EINVAL;
119 state->muted = ctrl->value;
120 wm8775_write(client, R21, 0x0c0);
121 wm8775_write(client, R14, 0x1d4);
122 wm8775_write(client, R15, 0x1d4);
123 if (!state->muted)
Hans Verkuil0edeea42005-11-08 21:37:25 -0800124 wm8775_write(client, R21, 0x100 + state->input);
Hans Verkuil0edeea42005-11-08 21:37:25 -0800125 break;
126
Hans Verkuil74cab312007-04-27 12:31:26 -0300127 case VIDIOC_G_CHIP_IDENT:
Hans Verkuil842441d2007-11-01 07:35:41 -0300128 return v4l2_chip_ident_i2c_client(client,
129 arg, V4L2_IDENT_WM8775, 0);
Hans Verkuil74cab312007-04-27 12:31:26 -0300130
Hans Verkuilbf7e26e2005-11-08 21:37:50 -0800131 case VIDIOC_LOG_STATUS:
Hans Verkuilfac9e892006-01-09 15:32:40 -0200132 v4l_info(client, "Input: %d%s\n", state->input,
Hans Verkuilbf7e26e2005-11-08 21:37:50 -0800133 state->muted ? " (muted)" : "");
134 break;
Hans Verkuil0edeea42005-11-08 21:37:25 -0800135
Hans Verkuilbf7e26e2005-11-08 21:37:50 -0800136 case VIDIOC_S_FREQUENCY:
Hans Verkuil0edeea42005-11-08 21:37:25 -0800137 /* If I remove this, then it can happen that I have no
138 sound the first time I tune from static to a valid channel.
139 It's difficult to reproduce and is almost certainly related
140 to the zero cross detect circuit. */
141 wm8775_write(client, R21, 0x0c0);
142 wm8775_write(client, R14, 0x1d4);
143 wm8775_write(client, R15, 0x1d4);
144 wm8775_write(client, R21, 0x100 + state->input);
145 break;
146
147 default:
148 return -EINVAL;
149 }
150 return 0;
151}
152
153/* ----------------------------------------------------------------------- */
154
155/* i2c implementation */
156
157/*
158 * Generic i2c probe
159 * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1'
160 */
161
Hans Verkuild9a53aa2007-09-13 11:08:25 -0300162static int wm8775_probe(struct i2c_client *client)
Hans Verkuil0edeea42005-11-08 21:37:25 -0800163{
Hans Verkuil0edeea42005-11-08 21:37:25 -0800164 struct wm8775_state *state;
165
166 /* Check if the adapter supports the needed features */
Hans Verkuild9a53aa2007-09-13 11:08:25 -0300167 if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
168 return -EIO;
Hans Verkuil0edeea42005-11-08 21:37:25 -0800169
Hans Verkuil842441d2007-11-01 07:35:41 -0300170 v4l_info(client, "chip found @ 0x%x (%s)\n",
171 client->addr << 1, client->adapter->name);
Hans Verkuil0edeea42005-11-08 21:37:25 -0800172
173 state = kmalloc(sizeof(struct wm8775_state), GFP_KERNEL);
Hans Verkuil842441d2007-11-01 07:35:41 -0300174 if (state == NULL)
Hans Verkuil0edeea42005-11-08 21:37:25 -0800175 return -ENOMEM;
Hans Verkuil0edeea42005-11-08 21:37:25 -0800176 state->input = 2;
177 state->muted = 0;
178 i2c_set_clientdata(client, state);
179
Hans Verkuil842441d2007-11-01 07:35:41 -0300180 /* Initialize wm8775 */
181
182 /* RESET */
183 wm8775_write(client, R23, 0x000);
184 /* Disable zero cross detect timeout */
185 wm8775_write(client, R7, 0x000);
186 /* Left justified, 24-bit mode */
187 wm8775_write(client, R11, 0x021);
188 /* Master mode, clock ratio 256fs */
189 wm8775_write(client, R12, 0x102);
190 /* Powered up */
191 wm8775_write(client, R13, 0x000);
192 /* ADC gain +2.5dB, enable zero cross */
193 wm8775_write(client, R14, 0x1d4);
194 /* ADC gain +2.5dB, enable zero cross */
195 wm8775_write(client, R15, 0x1d4);
196 /* ALC Stereo, ALC target level -1dB FS max gain +8dB */
197 wm8775_write(client, R16, 0x1bf);
198 /* Enable gain control, use zero cross detection,
199 ALC hold time 42.6 ms */
200 wm8775_write(client, R17, 0x185);
201 /* ALC gain ramp up delay 34 s, ALC gain ramp down delay 33 ms */
202 wm8775_write(client, R18, 0x0a2);
203 /* Enable noise gate, threshold -72dBfs */
204 wm8775_write(client, R19, 0x005);
205 /* Transient window 4ms, lower PGA gain limit -1dB */
206 wm8775_write(client, R20, 0x07a);
207 /* LRBOTH = 1, use input 2. */
208 wm8775_write(client, R21, 0x102);
Hans Verkuil0edeea42005-11-08 21:37:25 -0800209 return 0;
210}
211
Hans Verkuild9a53aa2007-09-13 11:08:25 -0300212static int wm8775_remove(struct i2c_client *client)
Hans Verkuil0edeea42005-11-08 21:37:25 -0800213{
Hans Verkuild9a53aa2007-09-13 11:08:25 -0300214 kfree(i2c_get_clientdata(client));
Hans Verkuil0edeea42005-11-08 21:37:25 -0800215 return 0;
216}
217
Hans Verkuild9a53aa2007-09-13 11:08:25 -0300218static struct v4l2_i2c_driver_data v4l2_i2c_data = {
219 .name = "wm8775",
220 .driverid = I2C_DRIVERID_WM8775,
221 .command = wm8775_command,
222 .probe = wm8775_probe,
223 .remove = wm8775_remove,
Hans Verkuil0edeea42005-11-08 21:37:25 -0800224};
225