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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> | |
33b687cf | 32 | #include <linux/videodev2.h> |
6869ffe8 | 33 | #include <media/v4l2-device.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 | ||
88ca8ed0 SA |
42 | I2C_CLIENT_INSMOD; |
43 | ||
44 | /* ----------------------------------------------------------------------- */ | |
45 | ||
46 | struct tlv320aic23b_state { | |
6869ffe8 | 47 | struct v4l2_subdev sd; |
88ca8ed0 SA |
48 | u8 muted; |
49 | }; | |
50 | ||
6869ffe8 | 51 | static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd) |
88ca8ed0 | 52 | { |
6869ffe8 HV |
53 | return container_of(sd, struct tlv320aic23b_state, sd); |
54 | } | |
55 | ||
56 | static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) | |
57 | { | |
58 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
88ca8ed0 SA |
59 | int i; |
60 | ||
61 | if ((reg < 0 || reg > 9) && (reg != 15)) { | |
6869ffe8 | 62 | v4l2_err(sd, "Invalid register R%d\n", reg); |
88ca8ed0 SA |
63 | return -1; |
64 | } | |
65 | ||
574dec61 HV |
66 | for (i = 0; i < 3; i++) |
67 | if (i2c_smbus_write_byte_data(client, | |
68 | (reg << 1) | (val >> 8), val & 0xff) == 0) | |
88ca8ed0 | 69 | return 0; |
6869ffe8 | 70 | v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); |
88ca8ed0 SA |
71 | return -1; |
72 | } | |
73 | ||
6869ffe8 | 74 | static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) |
88ca8ed0 | 75 | { |
6869ffe8 HV |
76 | switch (freq) { |
77 | case 32000: /* set sample rate to 32 kHz */ | |
78 | tlv320aic23b_write(sd, 8, 0x018); | |
88ca8ed0 | 79 | break; |
6869ffe8 HV |
80 | case 44100: /* set sample rate to 44.1 kHz */ |
81 | tlv320aic23b_write(sd, 8, 0x022); | |
88ca8ed0 | 82 | break; |
6869ffe8 HV |
83 | case 48000: /* set sample rate to 48 kHz */ |
84 | tlv320aic23b_write(sd, 8, 0x000); | |
88ca8ed0 | 85 | break; |
88ca8ed0 SA |
86 | default: |
87 | return -EINVAL; | |
88 | } | |
89 | return 0; | |
90 | } | |
91 | ||
6869ffe8 HV |
92 | static int tlv320aic23b_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
93 | { | |
94 | struct tlv320aic23b_state *state = to_state(sd); | |
95 | ||
96 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
97 | return -EINVAL; | |
98 | ctrl->value = state->muted; | |
99 | return 0; | |
100 | } | |
101 | ||
102 | static int tlv320aic23b_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | |
103 | { | |
104 | struct tlv320aic23b_state *state = to_state(sd); | |
105 | ||
106 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
107 | return -EINVAL; | |
108 | state->muted = ctrl->value; | |
109 | tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ | |
110 | /* set gain on both channels to +3.0 dB */ | |
111 | if (!state->muted) | |
112 | tlv320aic23b_write(sd, 0, 0x119); | |
113 | return 0; | |
114 | } | |
115 | ||
116 | static int tlv320aic23b_log_status(struct v4l2_subdev *sd) | |
117 | { | |
118 | struct tlv320aic23b_state *state = to_state(sd); | |
119 | ||
120 | v4l2_info(sd, "Input: %s\n", state->muted ? "muted" : "active"); | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static int tlv320aic23b_command(struct i2c_client *client, unsigned cmd, void *arg) | |
125 | { | |
126 | return v4l2_subdev_command(i2c_get_clientdata(client), cmd, arg); | |
127 | } | |
128 | ||
129 | /* ----------------------------------------------------------------------- */ | |
130 | ||
131 | static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { | |
132 | .log_status = tlv320aic23b_log_status, | |
133 | .g_ctrl = tlv320aic23b_g_ctrl, | |
134 | .s_ctrl = tlv320aic23b_s_ctrl, | |
135 | }; | |
136 | ||
137 | static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { | |
138 | .s_clock_freq = tlv320aic23b_s_clock_freq, | |
139 | }; | |
140 | ||
141 | static const struct v4l2_subdev_ops tlv320aic23b_ops = { | |
142 | .core = &tlv320aic23b_core_ops, | |
143 | .audio = &tlv320aic23b_audio_ops, | |
144 | }; | |
145 | ||
88ca8ed0 SA |
146 | /* ----------------------------------------------------------------------- */ |
147 | ||
148 | /* i2c implementation */ | |
149 | ||
150 | /* | |
151 | * Generic i2c probe | |
152 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
153 | */ | |
154 | ||
d2653e92 JD |
155 | static int tlv320aic23b_probe(struct i2c_client *client, |
156 | const struct i2c_device_id *id) | |
88ca8ed0 | 157 | { |
88ca8ed0 | 158 | struct tlv320aic23b_state *state; |
6869ffe8 | 159 | struct v4l2_subdev *sd; |
88ca8ed0 SA |
160 | |
161 | /* Check if the adapter supports the needed features */ | |
6235168d | 162 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
188f3457 | 163 | return -EIO; |
88ca8ed0 | 164 | |
574dec61 HV |
165 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
166 | client->addr << 1, client->adapter->name); | |
88ca8ed0 | 167 | |
6869ffe8 | 168 | state = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL); |
574dec61 | 169 | if (state == NULL) |
88ca8ed0 | 170 | return -ENOMEM; |
6869ffe8 HV |
171 | sd = &state->sd; |
172 | v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); | |
88ca8ed0 | 173 | state->muted = 0; |
88ca8ed0 | 174 | |
574dec61 HV |
175 | /* Initialize tlv320aic23b */ |
176 | ||
177 | /* RESET */ | |
6869ffe8 | 178 | tlv320aic23b_write(sd, 15, 0x000); |
574dec61 | 179 | /* turn off DAC & mic input */ |
6869ffe8 | 180 | tlv320aic23b_write(sd, 6, 0x00A); |
574dec61 | 181 | /* left-justified, 24-bit, master mode */ |
6869ffe8 | 182 | tlv320aic23b_write(sd, 7, 0x049); |
574dec61 | 183 | /* set gain on both channels to +3.0 dB */ |
6869ffe8 | 184 | tlv320aic23b_write(sd, 0, 0x119); |
574dec61 | 185 | /* set sample rate to 48 kHz */ |
6869ffe8 | 186 | tlv320aic23b_write(sd, 8, 0x000); |
574dec61 | 187 | /* activate digital interface */ |
6869ffe8 | 188 | tlv320aic23b_write(sd, 9, 0x001); |
88ca8ed0 SA |
189 | return 0; |
190 | } | |
191 | ||
6235168d | 192 | static int tlv320aic23b_remove(struct i2c_client *client) |
88ca8ed0 | 193 | { |
6869ffe8 HV |
194 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
195 | ||
196 | v4l2_device_unregister_subdev(sd); | |
197 | kfree(to_state(sd)); | |
88ca8ed0 SA |
198 | return 0; |
199 | } | |
200 | ||
201 | /* ----------------------------------------------------------------------- */ | |
202 | ||
ae429083 JD |
203 | static const struct i2c_device_id tlv320aic23b_id[] = { |
204 | { "tlv320aic23b", 0 }, | |
205 | { } | |
206 | }; | |
207 | MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); | |
88ca8ed0 | 208 | |
6235168d HV |
209 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
210 | .name = "tlv320aic23b", | |
211 | .driverid = I2C_DRIVERID_TLV320AIC23B, | |
212 | .command = tlv320aic23b_command, | |
213 | .probe = tlv320aic23b_probe, | |
214 | .remove = tlv320aic23b_remove, | |
ae429083 | 215 | .id_table = tlv320aic23b_id, |
6235168d | 216 | }; |