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88ca8ed0 SA |
1 | /* |
2 | * tlv320aic23b - driver version 0.0.1 | |
3 | * | |
4 | * Copyright (C) 2006 Scott Alfter <salfter@ssai.us> | |
5 | * | |
6 | * Based on wm8775 driver | |
7 | * | |
8 | * Copyright (C) 2004 Ulf Eklund <ivtv at eklund.to> | |
9 | * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License as published by | |
13 | * the Free Software Foundation; either version 2 of the License, or | |
14 | * (at your option) any later version. | |
15 | * | |
16 | * This program is distributed in the hope that it will be useful, | |
17 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | * GNU General Public License for more details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/ioctl.h> | |
29 | #include <asm/uaccess.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/i2c-id.h> | |
32 | #include <linux/videodev.h> | |
33 | #include <media/v4l2-common.h> | |
6235168d | 34 | #include <media/v4l2-i2c-drv-legacy.h> |
88ca8ed0 SA |
35 | |
36 | MODULE_DESCRIPTION("tlv320aic23b driver"); | |
37 | MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); | |
38 | MODULE_LICENSE("GPL"); | |
39 | ||
40 | static unsigned short normal_i2c[] = { 0x34 >> 1, I2C_CLIENT_END }; | |
41 | ||
42 | ||
43 | I2C_CLIENT_INSMOD; | |
44 | ||
45 | /* ----------------------------------------------------------------------- */ | |
46 | ||
47 | struct tlv320aic23b_state { | |
48 | u8 muted; | |
49 | }; | |
50 | ||
51 | static int tlv320aic23b_write(struct i2c_client *client, int reg, u16 val) | |
52 | { | |
53 | int i; | |
54 | ||
55 | if ((reg < 0 || reg > 9) && (reg != 15)) { | |
56 | v4l_err(client, "Invalid register R%d\n", reg); | |
57 | return -1; | |
58 | } | |
59 | ||
574dec61 HV |
60 | for (i = 0; i < 3; i++) |
61 | if (i2c_smbus_write_byte_data(client, | |
62 | (reg << 1) | (val >> 8), val & 0xff) == 0) | |
88ca8ed0 | 63 | return 0; |
88ca8ed0 SA |
64 | v4l_err(client, "I2C: cannot write %03x to register R%d\n", val, reg); |
65 | return -1; | |
66 | } | |
67 | ||
574dec61 HV |
68 | static int tlv320aic23b_command(struct i2c_client *client, |
69 | unsigned int cmd, void *arg) | |
88ca8ed0 SA |
70 | { |
71 | struct tlv320aic23b_state *state = i2c_get_clientdata(client); | |
72 | struct v4l2_control *ctrl = arg; | |
574dec61 | 73 | u32 *freq = arg; |
88ca8ed0 SA |
74 | |
75 | switch (cmd) { | |
76 | case VIDIOC_INT_AUDIO_CLOCK_FREQ: | |
77 | switch (*freq) { | |
574dec61 HV |
78 | case 32000: /* set sample rate to 32 kHz */ |
79 | tlv320aic23b_write(client, 8, 0x018); | |
80 | break; | |
81 | case 44100: /* set sample rate to 44.1 kHz */ | |
82 | tlv320aic23b_write(client, 8, 0x022); | |
83 | break; | |
84 | case 48000: /* set sample rate to 48 kHz */ | |
85 | tlv320aic23b_write(client, 8, 0x000); | |
86 | break; | |
87 | default: | |
88 | return -EINVAL; | |
88ca8ed0 SA |
89 | } |
90 | break; | |
91 | ||
92 | case VIDIOC_G_CTRL: | |
93 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
94 | return -EINVAL; | |
95 | ctrl->value = state->muted; | |
96 | break; | |
97 | ||
98 | case VIDIOC_S_CTRL: | |
99 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
100 | return -EINVAL; | |
101 | state->muted = ctrl->value; | |
102 | tlv320aic23b_write(client, 0, 0x180); /* mute both channels */ | |
103 | /* set gain on both channels to +3.0 dB */ | |
104 | if (!state->muted) | |
105 | tlv320aic23b_write(client, 0, 0x119); | |
106 | break; | |
107 | ||
108 | case VIDIOC_LOG_STATUS: | |
109 | v4l_info(client, "Input: %s\n", | |
110 | state->muted ? "muted" : "active"); | |
111 | break; | |
112 | ||
113 | default: | |
114 | return -EINVAL; | |
115 | } | |
116 | return 0; | |
117 | } | |
118 | ||
119 | /* ----------------------------------------------------------------------- */ | |
120 | ||
121 | /* i2c implementation */ | |
122 | ||
123 | /* | |
124 | * Generic i2c probe | |
125 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
126 | */ | |
127 | ||
6235168d | 128 | static int tlv320aic23b_probe(struct i2c_client *client) |
88ca8ed0 | 129 | { |
88ca8ed0 SA |
130 | struct tlv320aic23b_state *state; |
131 | ||
132 | /* Check if the adapter supports the needed features */ | |
6235168d | 133 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
188f3457 | 134 | return -EIO; |
88ca8ed0 | 135 | |
574dec61 HV |
136 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
137 | client->addr << 1, client->adapter->name); | |
88ca8ed0 SA |
138 | |
139 | state = kmalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL); | |
574dec61 | 140 | if (state == NULL) |
88ca8ed0 | 141 | return -ENOMEM; |
88ca8ed0 SA |
142 | state->muted = 0; |
143 | i2c_set_clientdata(client, state); | |
144 | ||
574dec61 HV |
145 | /* Initialize tlv320aic23b */ |
146 | ||
147 | /* RESET */ | |
148 | tlv320aic23b_write(client, 15, 0x000); | |
149 | /* turn off DAC & mic input */ | |
150 | tlv320aic23b_write(client, 6, 0x00A); | |
151 | /* left-justified, 24-bit, master mode */ | |
152 | tlv320aic23b_write(client, 7, 0x049); | |
153 | /* set gain on both channels to +3.0 dB */ | |
154 | tlv320aic23b_write(client, 0, 0x119); | |
155 | /* set sample rate to 48 kHz */ | |
156 | tlv320aic23b_write(client, 8, 0x000); | |
157 | /* activate digital interface */ | |
158 | tlv320aic23b_write(client, 9, 0x001); | |
88ca8ed0 SA |
159 | return 0; |
160 | } | |
161 | ||
6235168d | 162 | static int tlv320aic23b_remove(struct i2c_client *client) |
88ca8ed0 | 163 | { |
6235168d | 164 | kfree(i2c_get_clientdata(client)); |
88ca8ed0 SA |
165 | return 0; |
166 | } | |
167 | ||
168 | /* ----------------------------------------------------------------------- */ | |
169 | ||
88ca8ed0 | 170 | |
6235168d HV |
171 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
172 | .name = "tlv320aic23b", | |
173 | .driverid = I2C_DRIVERID_TLV320AIC23B, | |
174 | .command = tlv320aic23b_command, | |
175 | .probe = tlv320aic23b_probe, | |
176 | .remove = tlv320aic23b_remove, | |
177 | }; |