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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> | |
5a0e3ad6 | 28 | #include <linux/slab.h> |
88ca8ed0 SA |
29 | #include <linux/ioctl.h> |
30 | #include <asm/uaccess.h> | |
31 | #include <linux/i2c.h> | |
32 | #include <linux/i2c-id.h> | |
33b687cf | 33 | #include <linux/videodev2.h> |
6869ffe8 | 34 | #include <media/v4l2-device.h> |
501cd11a | 35 | #include <media/v4l2-i2c-drv.h> |
88ca8ed0 SA |
36 | |
37 | MODULE_DESCRIPTION("tlv320aic23b driver"); | |
38 | MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); | |
39 | MODULE_LICENSE("GPL"); | |
40 | ||
88ca8ed0 SA |
41 | |
42 | /* ----------------------------------------------------------------------- */ | |
43 | ||
44 | struct tlv320aic23b_state { | |
6869ffe8 | 45 | struct v4l2_subdev sd; |
88ca8ed0 SA |
46 | u8 muted; |
47 | }; | |
48 | ||
6869ffe8 | 49 | static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd) |
88ca8ed0 | 50 | { |
6869ffe8 HV |
51 | return container_of(sd, struct tlv320aic23b_state, sd); |
52 | } | |
53 | ||
54 | static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) | |
55 | { | |
56 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
88ca8ed0 SA |
57 | int i; |
58 | ||
59 | if ((reg < 0 || reg > 9) && (reg != 15)) { | |
6869ffe8 | 60 | v4l2_err(sd, "Invalid register R%d\n", reg); |
88ca8ed0 SA |
61 | return -1; |
62 | } | |
63 | ||
574dec61 HV |
64 | for (i = 0; i < 3; i++) |
65 | if (i2c_smbus_write_byte_data(client, | |
66 | (reg << 1) | (val >> 8), val & 0xff) == 0) | |
88ca8ed0 | 67 | return 0; |
6869ffe8 | 68 | v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); |
88ca8ed0 SA |
69 | return -1; |
70 | } | |
71 | ||
6869ffe8 | 72 | static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) |
88ca8ed0 | 73 | { |
6869ffe8 HV |
74 | switch (freq) { |
75 | case 32000: /* set sample rate to 32 kHz */ | |
76 | tlv320aic23b_write(sd, 8, 0x018); | |
88ca8ed0 | 77 | break; |
6869ffe8 HV |
78 | case 44100: /* set sample rate to 44.1 kHz */ |
79 | tlv320aic23b_write(sd, 8, 0x022); | |
88ca8ed0 | 80 | break; |
6869ffe8 HV |
81 | case 48000: /* set sample rate to 48 kHz */ |
82 | tlv320aic23b_write(sd, 8, 0x000); | |
88ca8ed0 | 83 | break; |
88ca8ed0 SA |
84 | default: |
85 | return -EINVAL; | |
86 | } | |
87 | return 0; | |
88 | } | |
89 | ||
6869ffe8 HV |
90 | static int tlv320aic23b_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) |
91 | { | |
92 | struct tlv320aic23b_state *state = to_state(sd); | |
93 | ||
94 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
95 | return -EINVAL; | |
96 | ctrl->value = state->muted; | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int tlv320aic23b_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) | |
101 | { | |
102 | struct tlv320aic23b_state *state = to_state(sd); | |
103 | ||
104 | if (ctrl->id != V4L2_CID_AUDIO_MUTE) | |
105 | return -EINVAL; | |
106 | state->muted = ctrl->value; | |
107 | tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ | |
108 | /* set gain on both channels to +3.0 dB */ | |
109 | if (!state->muted) | |
110 | tlv320aic23b_write(sd, 0, 0x119); | |
111 | return 0; | |
112 | } | |
113 | ||
114 | static int tlv320aic23b_log_status(struct v4l2_subdev *sd) | |
115 | { | |
116 | struct tlv320aic23b_state *state = to_state(sd); | |
117 | ||
118 | v4l2_info(sd, "Input: %s\n", state->muted ? "muted" : "active"); | |
119 | return 0; | |
120 | } | |
121 | ||
6869ffe8 HV |
122 | /* ----------------------------------------------------------------------- */ |
123 | ||
124 | static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { | |
125 | .log_status = tlv320aic23b_log_status, | |
126 | .g_ctrl = tlv320aic23b_g_ctrl, | |
127 | .s_ctrl = tlv320aic23b_s_ctrl, | |
128 | }; | |
129 | ||
130 | static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { | |
131 | .s_clock_freq = tlv320aic23b_s_clock_freq, | |
132 | }; | |
133 | ||
134 | static const struct v4l2_subdev_ops tlv320aic23b_ops = { | |
135 | .core = &tlv320aic23b_core_ops, | |
136 | .audio = &tlv320aic23b_audio_ops, | |
137 | }; | |
138 | ||
88ca8ed0 SA |
139 | /* ----------------------------------------------------------------------- */ |
140 | ||
141 | /* i2c implementation */ | |
142 | ||
143 | /* | |
144 | * Generic i2c probe | |
145 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
146 | */ | |
147 | ||
d2653e92 JD |
148 | static int tlv320aic23b_probe(struct i2c_client *client, |
149 | const struct i2c_device_id *id) | |
88ca8ed0 | 150 | { |
88ca8ed0 | 151 | struct tlv320aic23b_state *state; |
6869ffe8 | 152 | struct v4l2_subdev *sd; |
88ca8ed0 SA |
153 | |
154 | /* Check if the adapter supports the needed features */ | |
6235168d | 155 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
188f3457 | 156 | return -EIO; |
88ca8ed0 | 157 | |
574dec61 HV |
158 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
159 | client->addr << 1, client->adapter->name); | |
88ca8ed0 | 160 | |
6869ffe8 | 161 | state = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL); |
574dec61 | 162 | if (state == NULL) |
88ca8ed0 | 163 | return -ENOMEM; |
6869ffe8 HV |
164 | sd = &state->sd; |
165 | v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); | |
88ca8ed0 | 166 | state->muted = 0; |
88ca8ed0 | 167 | |
574dec61 HV |
168 | /* Initialize tlv320aic23b */ |
169 | ||
170 | /* RESET */ | |
6869ffe8 | 171 | tlv320aic23b_write(sd, 15, 0x000); |
574dec61 | 172 | /* turn off DAC & mic input */ |
6869ffe8 | 173 | tlv320aic23b_write(sd, 6, 0x00A); |
574dec61 | 174 | /* left-justified, 24-bit, master mode */ |
6869ffe8 | 175 | tlv320aic23b_write(sd, 7, 0x049); |
574dec61 | 176 | /* set gain on both channels to +3.0 dB */ |
6869ffe8 | 177 | tlv320aic23b_write(sd, 0, 0x119); |
574dec61 | 178 | /* set sample rate to 48 kHz */ |
6869ffe8 | 179 | tlv320aic23b_write(sd, 8, 0x000); |
574dec61 | 180 | /* activate digital interface */ |
6869ffe8 | 181 | tlv320aic23b_write(sd, 9, 0x001); |
88ca8ed0 SA |
182 | return 0; |
183 | } | |
184 | ||
6235168d | 185 | static int tlv320aic23b_remove(struct i2c_client *client) |
88ca8ed0 | 186 | { |
6869ffe8 HV |
187 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
188 | ||
189 | v4l2_device_unregister_subdev(sd); | |
190 | kfree(to_state(sd)); | |
88ca8ed0 SA |
191 | return 0; |
192 | } | |
193 | ||
194 | /* ----------------------------------------------------------------------- */ | |
195 | ||
ae429083 JD |
196 | static const struct i2c_device_id tlv320aic23b_id[] = { |
197 | { "tlv320aic23b", 0 }, | |
198 | { } | |
199 | }; | |
200 | MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); | |
88ca8ed0 | 201 | |
6235168d HV |
202 | static struct v4l2_i2c_driver_data v4l2_i2c_data = { |
203 | .name = "tlv320aic23b", | |
6235168d HV |
204 | .probe = tlv320aic23b_probe, |
205 | .remove = tlv320aic23b_remove, | |
ae429083 | 206 | .id_table = tlv320aic23b_id, |
6235168d | 207 | }; |