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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> | |
33b687cf | 32 | #include <linux/videodev2.h> |
6869ffe8 | 33 | #include <media/v4l2-device.h> |
e3d5ef04 | 34 | #include <media/v4l2-ctrls.h> |
88ca8ed0 SA |
35 | |
36 | MODULE_DESCRIPTION("tlv320aic23b driver"); | |
37 | MODULE_AUTHOR("Scott Alfter, Ulf Eklund, Hans Verkuil"); | |
38 | MODULE_LICENSE("GPL"); | |
39 | ||
88ca8ed0 SA |
40 | |
41 | /* ----------------------------------------------------------------------- */ | |
42 | ||
43 | struct tlv320aic23b_state { | |
6869ffe8 | 44 | struct v4l2_subdev sd; |
e3d5ef04 | 45 | struct v4l2_ctrl_handler hdl; |
88ca8ed0 SA |
46 | }; |
47 | ||
6869ffe8 | 48 | static inline struct tlv320aic23b_state *to_state(struct v4l2_subdev *sd) |
88ca8ed0 | 49 | { |
6869ffe8 HV |
50 | return container_of(sd, struct tlv320aic23b_state, sd); |
51 | } | |
52 | ||
e3d5ef04 HV |
53 | static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
54 | { | |
55 | return &container_of(ctrl->handler, struct tlv320aic23b_state, hdl)->sd; | |
56 | } | |
57 | ||
6869ffe8 HV |
58 | static int tlv320aic23b_write(struct v4l2_subdev *sd, int reg, u16 val) |
59 | { | |
60 | struct i2c_client *client = v4l2_get_subdevdata(sd); | |
88ca8ed0 SA |
61 | int i; |
62 | ||
63 | if ((reg < 0 || reg > 9) && (reg != 15)) { | |
6869ffe8 | 64 | v4l2_err(sd, "Invalid register R%d\n", reg); |
88ca8ed0 SA |
65 | return -1; |
66 | } | |
67 | ||
574dec61 HV |
68 | for (i = 0; i < 3; i++) |
69 | if (i2c_smbus_write_byte_data(client, | |
70 | (reg << 1) | (val >> 8), val & 0xff) == 0) | |
88ca8ed0 | 71 | return 0; |
6869ffe8 | 72 | v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); |
88ca8ed0 SA |
73 | return -1; |
74 | } | |
75 | ||
6869ffe8 | 76 | static int tlv320aic23b_s_clock_freq(struct v4l2_subdev *sd, u32 freq) |
88ca8ed0 | 77 | { |
6869ffe8 HV |
78 | switch (freq) { |
79 | case 32000: /* set sample rate to 32 kHz */ | |
80 | tlv320aic23b_write(sd, 8, 0x018); | |
88ca8ed0 | 81 | break; |
6869ffe8 HV |
82 | case 44100: /* set sample rate to 44.1 kHz */ |
83 | tlv320aic23b_write(sd, 8, 0x022); | |
88ca8ed0 | 84 | break; |
6869ffe8 HV |
85 | case 48000: /* set sample rate to 48 kHz */ |
86 | tlv320aic23b_write(sd, 8, 0x000); | |
88ca8ed0 | 87 | break; |
88ca8ed0 SA |
88 | default: |
89 | return -EINVAL; | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
e3d5ef04 | 94 | static int tlv320aic23b_s_ctrl(struct v4l2_ctrl *ctrl) |
6869ffe8 | 95 | { |
e3d5ef04 HV |
96 | struct v4l2_subdev *sd = to_sd(ctrl); |
97 | ||
98 | switch (ctrl->id) { | |
99 | case V4L2_CID_AUDIO_MUTE: | |
100 | tlv320aic23b_write(sd, 0, 0x180); /* mute both channels */ | |
101 | /* set gain on both channels to +3.0 dB */ | |
102 | if (!ctrl->val) | |
103 | tlv320aic23b_write(sd, 0, 0x119); | |
104 | return 0; | |
105 | } | |
106 | return -EINVAL; | |
6869ffe8 HV |
107 | } |
108 | ||
109 | static int tlv320aic23b_log_status(struct v4l2_subdev *sd) | |
110 | { | |
111 | struct tlv320aic23b_state *state = to_state(sd); | |
112 | ||
e3d5ef04 | 113 | v4l2_ctrl_handler_log_status(&state->hdl, sd->name); |
6869ffe8 HV |
114 | return 0; |
115 | } | |
116 | ||
6869ffe8 HV |
117 | /* ----------------------------------------------------------------------- */ |
118 | ||
e3d5ef04 HV |
119 | static const struct v4l2_ctrl_ops tlv320aic23b_ctrl_ops = { |
120 | .s_ctrl = tlv320aic23b_s_ctrl, | |
121 | }; | |
122 | ||
6869ffe8 HV |
123 | static const struct v4l2_subdev_core_ops tlv320aic23b_core_ops = { |
124 | .log_status = tlv320aic23b_log_status, | |
e3d5ef04 HV |
125 | .g_ext_ctrls = v4l2_subdev_g_ext_ctrls, |
126 | .try_ext_ctrls = v4l2_subdev_try_ext_ctrls, | |
127 | .s_ext_ctrls = v4l2_subdev_s_ext_ctrls, | |
128 | .g_ctrl = v4l2_subdev_g_ctrl, | |
129 | .s_ctrl = v4l2_subdev_s_ctrl, | |
130 | .queryctrl = v4l2_subdev_queryctrl, | |
131 | .querymenu = v4l2_subdev_querymenu, | |
6869ffe8 HV |
132 | }; |
133 | ||
134 | static const struct v4l2_subdev_audio_ops tlv320aic23b_audio_ops = { | |
135 | .s_clock_freq = tlv320aic23b_s_clock_freq, | |
136 | }; | |
137 | ||
138 | static const struct v4l2_subdev_ops tlv320aic23b_ops = { | |
139 | .core = &tlv320aic23b_core_ops, | |
140 | .audio = &tlv320aic23b_audio_ops, | |
141 | }; | |
142 | ||
88ca8ed0 SA |
143 | /* ----------------------------------------------------------------------- */ |
144 | ||
145 | /* i2c implementation */ | |
146 | ||
147 | /* | |
148 | * Generic i2c probe | |
149 | * concerning the addresses: i2c wants 7 bit (without the r/w bit), so '>>1' | |
150 | */ | |
151 | ||
d2653e92 JD |
152 | static int tlv320aic23b_probe(struct i2c_client *client, |
153 | const struct i2c_device_id *id) | |
88ca8ed0 | 154 | { |
88ca8ed0 | 155 | struct tlv320aic23b_state *state; |
6869ffe8 | 156 | struct v4l2_subdev *sd; |
88ca8ed0 SA |
157 | |
158 | /* Check if the adapter supports the needed features */ | |
6235168d | 159 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
188f3457 | 160 | return -EIO; |
88ca8ed0 | 161 | |
574dec61 HV |
162 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
163 | client->addr << 1, client->adapter->name); | |
88ca8ed0 | 164 | |
6869ffe8 | 165 | state = kzalloc(sizeof(struct tlv320aic23b_state), GFP_KERNEL); |
574dec61 | 166 | if (state == NULL) |
88ca8ed0 | 167 | return -ENOMEM; |
6869ffe8 HV |
168 | sd = &state->sd; |
169 | v4l2_i2c_subdev_init(sd, client, &tlv320aic23b_ops); | |
88ca8ed0 | 170 | |
574dec61 HV |
171 | /* Initialize tlv320aic23b */ |
172 | ||
173 | /* RESET */ | |
6869ffe8 | 174 | tlv320aic23b_write(sd, 15, 0x000); |
574dec61 | 175 | /* turn off DAC & mic input */ |
6869ffe8 | 176 | tlv320aic23b_write(sd, 6, 0x00A); |
574dec61 | 177 | /* left-justified, 24-bit, master mode */ |
6869ffe8 | 178 | tlv320aic23b_write(sd, 7, 0x049); |
574dec61 | 179 | /* set gain on both channels to +3.0 dB */ |
6869ffe8 | 180 | tlv320aic23b_write(sd, 0, 0x119); |
574dec61 | 181 | /* set sample rate to 48 kHz */ |
6869ffe8 | 182 | tlv320aic23b_write(sd, 8, 0x000); |
574dec61 | 183 | /* activate digital interface */ |
6869ffe8 | 184 | tlv320aic23b_write(sd, 9, 0x001); |
e3d5ef04 HV |
185 | |
186 | v4l2_ctrl_handler_init(&state->hdl, 1); | |
187 | v4l2_ctrl_new_std(&state->hdl, &tlv320aic23b_ctrl_ops, | |
188 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); | |
189 | sd->ctrl_handler = &state->hdl; | |
190 | if (state->hdl.error) { | |
191 | int err = state->hdl.error; | |
192 | ||
193 | v4l2_ctrl_handler_free(&state->hdl); | |
194 | kfree(state); | |
195 | return err; | |
196 | } | |
197 | v4l2_ctrl_handler_setup(&state->hdl); | |
88ca8ed0 SA |
198 | return 0; |
199 | } | |
200 | ||
6235168d | 201 | static int tlv320aic23b_remove(struct i2c_client *client) |
88ca8ed0 | 202 | { |
6869ffe8 | 203 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
e3d5ef04 | 204 | struct tlv320aic23b_state *state = to_state(sd); |
6869ffe8 HV |
205 | |
206 | v4l2_device_unregister_subdev(sd); | |
e3d5ef04 HV |
207 | v4l2_ctrl_handler_free(&state->hdl); |
208 | kfree(state); | |
88ca8ed0 SA |
209 | return 0; |
210 | } | |
211 | ||
212 | /* ----------------------------------------------------------------------- */ | |
213 | ||
ae429083 JD |
214 | static const struct i2c_device_id tlv320aic23b_id[] = { |
215 | { "tlv320aic23b", 0 }, | |
216 | { } | |
217 | }; | |
218 | MODULE_DEVICE_TABLE(i2c, tlv320aic23b_id); | |
88ca8ed0 | 219 | |
8e71ff0a HV |
220 | static struct i2c_driver tlv320aic23b_driver = { |
221 | .driver = { | |
222 | .owner = THIS_MODULE, | |
223 | .name = "tlv320aic23b", | |
224 | }, | |
225 | .probe = tlv320aic23b_probe, | |
226 | .remove = tlv320aic23b_remove, | |
227 | .id_table = tlv320aic23b_id, | |
6235168d | 228 | }; |
8e71ff0a | 229 | |
c6e8d86f | 230 | module_i2c_driver(tlv320aic23b_driver); |