Commit | Line | Data |
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75c4570c HV |
1 | /* |
2 | * wm8739 | |
3 | * | |
4 | * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com> | |
5 | * | |
6 | * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl> | |
7 | * - Cleanup | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | */ | |
23 | ||
24 | #include <linux/module.h> | |
25 | #include <linux/types.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
75c4570c HV |
27 | #include <linux/ioctl.h> |
28 | #include <asm/uaccess.h> | |
29 | #include <linux/i2c.h> | |
33b687cf | 30 | #include <linux/videodev2.h> |
f1460e97 | 31 | #include <media/v4l2-device.h> |
f687d19d | 32 | #include <media/v4l2-ctrls.h> |
75c4570c HV |
33 | |
34 | MODULE_DESCRIPTION("wm8739 driver"); | |
35 | MODULE_AUTHOR("T. Adachi, Hans Verkuil"); | |
36 | MODULE_LICENSE("GPL"); | |
37 | ||
099b8e73 | 38 | static int debug; |
75c4570c HV |
39 | |
40 | module_param(debug, int, 0644); | |
41 | ||
42 | MODULE_PARM_DESC(debug, "Debug level (0-1)"); | |
43 | ||
44 | ||
75c4570c HV |
45 | /* ------------------------------------------------------------------------ */ |
46 | ||
47 | enum { | |
48 | R0 = 0, R1, | |
49 | R5 = 5, R6, R7, R8, R9, R15 = 15, | |
50 | TOT_REGS | |
51 | }; | |
52 | ||
53 | struct wm8739_state { | |
f1460e97 | 54 | struct v4l2_subdev sd; |
f687d19d HV |
55 | struct v4l2_ctrl_handler hdl; |
56 | struct { | |
57 | /* audio cluster */ | |
58 | struct v4l2_ctrl *volume; | |
59 | struct v4l2_ctrl *mute; | |
60 | struct v4l2_ctrl *balance; | |
61 | }; | |
75c4570c | 62 | u32 clock_freq; |
75c4570c HV |
63 | }; |
64 | ||
f1460e97 HV |
65 | static inline struct wm8739_state *to_state(struct v4l2_subdev *sd) |
66 | { | |
67 | return container_of(sd, struct wm8739_state, sd); | |
68 | } | |
69 | ||
f687d19d HV |
70 | static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl) |
71 | { | |
72 | return &container_of(ctrl->handler, struct wm8739_state, hdl)->sd; | |
73 | } | |
74 | ||
75c4570c HV |
75 | /* ------------------------------------------------------------------------ */ |
76 | ||
f1460e97 | 77 | static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val) |
75c4570c | 78 | { |
f1460e97 | 79 | struct i2c_client *client = v4l2_get_subdevdata(sd); |
75c4570c HV |
80 | int i; |
81 | ||
82 | if (reg < 0 || reg >= TOT_REGS) { | |
f1460e97 | 83 | v4l2_err(sd, "Invalid register R%d\n", reg); |
75c4570c HV |
84 | return -1; |
85 | } | |
86 | ||
f1460e97 | 87 | v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val); |
75c4570c | 88 | |
099b8e73 HV |
89 | for (i = 0; i < 3; i++) |
90 | if (i2c_smbus_write_byte_data(client, | |
91 | (reg << 1) | (val >> 8), val & 0xff) == 0) | |
75c4570c | 92 | return 0; |
f1460e97 | 93 | v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg); |
75c4570c HV |
94 | return -1; |
95 | } | |
96 | ||
f687d19d | 97 | static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl) |
75c4570c | 98 | { |
f687d19d | 99 | struct v4l2_subdev *sd = to_sd(ctrl); |
f1460e97 | 100 | struct wm8739_state *state = to_state(sd); |
75c4570c | 101 | unsigned int work_l, work_r; |
f687d19d HV |
102 | u8 vol_l; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */ |
103 | u8 vol_r; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */ | |
104 | u16 mute; | |
75c4570c HV |
105 | |
106 | switch (ctrl->id) { | |
75c4570c | 107 | case V4L2_CID_AUDIO_VOLUME: |
75c4570c HV |
108 | break; |
109 | ||
110 | default: | |
111 | return -EINVAL; | |
112 | } | |
113 | ||
114 | /* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */ | |
f687d19d HV |
115 | work_l = (min(65536 - state->balance->val, 32768) * state->volume->val) / 32768; |
116 | work_r = (min(state->balance->val, 32768) * state->volume->val) / 32768; | |
75c4570c | 117 | |
f687d19d HV |
118 | vol_l = (long)work_l * 31 / 65535; |
119 | vol_r = (long)work_r * 31 / 65535; | |
75c4570c HV |
120 | |
121 | /* set audio volume etc. */ | |
f687d19d HV |
122 | mute = state->mute->val ? 0x80 : 0; |
123 | ||
124 | /* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB | |
125 | * Default setting: 0x17 = 0 dB | |
126 | */ | |
127 | wm8739_write(sd, R0, (vol_l & 0x1f) | mute); | |
128 | wm8739_write(sd, R1, (vol_r & 0x1f) | mute); | |
75c4570c HV |
129 | return 0; |
130 | } | |
131 | ||
132 | /* ------------------------------------------------------------------------ */ | |
133 | ||
f1460e97 | 134 | static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq) |
75c4570c | 135 | { |
f1460e97 HV |
136 | struct wm8739_state *state = to_state(sd); |
137 | ||
138 | state->clock_freq = audiofreq; | |
139 | /* de-activate */ | |
140 | wm8739_write(sd, R9, 0x000); | |
141 | switch (audiofreq) { | |
142 | case 44100: | |
143 | /* 256fps, fs=44.1k */ | |
144 | wm8739_write(sd, R8, 0x020); | |
145 | break; | |
146 | case 48000: | |
147 | /* 256fps, fs=48k */ | |
148 | wm8739_write(sd, R8, 0x000); | |
149 | break; | |
150 | case 32000: | |
151 | /* 256fps, fs=32k */ | |
152 | wm8739_write(sd, R8, 0x018); | |
153 | break; | |
154 | default: | |
75c4570c HV |
155 | break; |
156 | } | |
f1460e97 HV |
157 | /* activate */ |
158 | wm8739_write(sd, R9, 0x001); | |
159 | return 0; | |
160 | } | |
75c4570c | 161 | |
f1460e97 HV |
162 | static int wm8739_log_status(struct v4l2_subdev *sd) |
163 | { | |
164 | struct wm8739_state *state = to_state(sd); | |
75c4570c | 165 | |
f1460e97 | 166 | v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq); |
f687d19d | 167 | v4l2_ctrl_handler_log_status(&state->hdl, sd->name); |
75c4570c HV |
168 | return 0; |
169 | } | |
170 | ||
f1460e97 HV |
171 | /* ----------------------------------------------------------------------- */ |
172 | ||
f687d19d HV |
173 | static const struct v4l2_ctrl_ops wm8739_ctrl_ops = { |
174 | .s_ctrl = wm8739_s_ctrl, | |
175 | }; | |
176 | ||
f1460e97 HV |
177 | static const struct v4l2_subdev_core_ops wm8739_core_ops = { |
178 | .log_status = wm8739_log_status, | |
f1460e97 HV |
179 | }; |
180 | ||
181 | static const struct v4l2_subdev_audio_ops wm8739_audio_ops = { | |
182 | .s_clock_freq = wm8739_s_clock_freq, | |
183 | }; | |
184 | ||
185 | static const struct v4l2_subdev_ops wm8739_ops = { | |
186 | .core = &wm8739_core_ops, | |
187 | .audio = &wm8739_audio_ops, | |
188 | }; | |
189 | ||
75c4570c HV |
190 | /* ------------------------------------------------------------------------ */ |
191 | ||
192 | /* i2c implementation */ | |
193 | ||
d2653e92 JD |
194 | static int wm8739_probe(struct i2c_client *client, |
195 | const struct i2c_device_id *id) | |
75c4570c | 196 | { |
75c4570c | 197 | struct wm8739_state *state; |
f1460e97 | 198 | struct v4l2_subdev *sd; |
75c4570c | 199 | |
188f3457 HV |
200 | /* Check if the adapter supports the needed features */ |
201 | if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA)) | |
202 | return -EIO; | |
203 | ||
099b8e73 HV |
204 | v4l_info(client, "chip found @ 0x%x (%s)\n", |
205 | client->addr << 1, client->adapter->name); | |
75c4570c | 206 | |
c02b211d | 207 | state = devm_kzalloc(&client->dev, sizeof(*state), GFP_KERNEL); |
6c832e36 | 208 | if (state == NULL) |
75c4570c | 209 | return -ENOMEM; |
f1460e97 HV |
210 | sd = &state->sd; |
211 | v4l2_i2c_subdev_init(sd, client, &wm8739_ops); | |
f687d19d HV |
212 | v4l2_ctrl_handler_init(&state->hdl, 2); |
213 | state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops, | |
214 | V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736); | |
215 | state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops, | |
216 | V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0); | |
217 | state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops, | |
218 | V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768); | |
219 | sd->ctrl_handler = &state->hdl; | |
220 | if (state->hdl.error) { | |
221 | int err = state->hdl.error; | |
222 | ||
223 | v4l2_ctrl_handler_free(&state->hdl); | |
f687d19d HV |
224 | return err; |
225 | } | |
226 | v4l2_ctrl_cluster(3, &state->volume); | |
227 | ||
75c4570c | 228 | state->clock_freq = 48000; |
75c4570c | 229 | |
099b8e73 HV |
230 | /* Initialize wm8739 */ |
231 | ||
232 | /* reset */ | |
f1460e97 | 233 | wm8739_write(sd, R15, 0x00); |
099b8e73 | 234 | /* filter setting, high path, offet clear */ |
f1460e97 | 235 | wm8739_write(sd, R5, 0x000); |
099b8e73 | 236 | /* ADC, OSC, Power Off mode Disable */ |
f1460e97 | 237 | wm8739_write(sd, R6, 0x000); |
099b8e73 HV |
238 | /* Digital Audio interface format: |
239 | Enable Master mode, 24 bit, MSB first/left justified */ | |
f1460e97 | 240 | wm8739_write(sd, R7, 0x049); |
099b8e73 | 241 | /* sampling control: normal, 256fs, 48KHz sampling rate */ |
f1460e97 | 242 | wm8739_write(sd, R8, 0x000); |
099b8e73 | 243 | /* activate */ |
f1460e97 | 244 | wm8739_write(sd, R9, 0x001); |
099b8e73 | 245 | /* set volume/mute */ |
f687d19d | 246 | v4l2_ctrl_handler_setup(&state->hdl); |
75c4570c HV |
247 | return 0; |
248 | } | |
249 | ||
49457cc2 | 250 | static int wm8739_remove(struct i2c_client *client) |
75c4570c | 251 | { |
f1460e97 | 252 | struct v4l2_subdev *sd = i2c_get_clientdata(client); |
f687d19d | 253 | struct wm8739_state *state = to_state(sd); |
f1460e97 HV |
254 | |
255 | v4l2_device_unregister_subdev(sd); | |
f687d19d | 256 | v4l2_ctrl_handler_free(&state->hdl); |
75c4570c HV |
257 | return 0; |
258 | } | |
259 | ||
af294867 JD |
260 | static const struct i2c_device_id wm8739_id[] = { |
261 | { "wm8739", 0 }, | |
262 | { } | |
263 | }; | |
264 | MODULE_DEVICE_TABLE(i2c, wm8739_id); | |
265 | ||
49facfaa HV |
266 | static struct i2c_driver wm8739_driver = { |
267 | .driver = { | |
49facfaa HV |
268 | .name = "wm8739", |
269 | }, | |
270 | .probe = wm8739_probe, | |
271 | .remove = wm8739_remove, | |
272 | .id_table = wm8739_id, | |
75c4570c | 273 | }; |
49facfaa | 274 | |
c6e8d86f | 275 | module_i2c_driver(wm8739_driver); |