[media] soc_camera: remove the now obsolete struct soc_camera_ops
[pandora-kernel.git] / drivers / media / video / wm8739.c
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>
26 #include <linux/slab.h>
27 #include <linux/ioctl.h>
28 #include <asm/uaccess.h>
29 #include <linux/i2c.h>
30 #include <linux/videodev2.h>
31 #include <media/v4l2-device.h>
32 #include <media/v4l2-chip-ident.h>
33 #include <media/v4l2-ctrls.h>
34
35 MODULE_DESCRIPTION("wm8739 driver");
36 MODULE_AUTHOR("T. Adachi, Hans Verkuil");
37 MODULE_LICENSE("GPL");
38
39 static int debug;
40
41 module_param(debug, int, 0644);
42
43 MODULE_PARM_DESC(debug, "Debug level (0-1)");
44
45
46 /* ------------------------------------------------------------------------ */
47
48 enum {
49         R0 = 0, R1,
50         R5 = 5, R6, R7, R8, R9, R15 = 15,
51         TOT_REGS
52 };
53
54 struct wm8739_state {
55         struct v4l2_subdev sd;
56         struct v4l2_ctrl_handler hdl;
57         struct {
58                 /* audio cluster */
59                 struct v4l2_ctrl *volume;
60                 struct v4l2_ctrl *mute;
61                 struct v4l2_ctrl *balance;
62         };
63         u32 clock_freq;
64 };
65
66 static inline struct wm8739_state *to_state(struct v4l2_subdev *sd)
67 {
68         return container_of(sd, struct wm8739_state, sd);
69 }
70
71 static inline struct v4l2_subdev *to_sd(struct v4l2_ctrl *ctrl)
72 {
73         return &container_of(ctrl->handler, struct wm8739_state, hdl)->sd;
74 }
75
76 /* ------------------------------------------------------------------------ */
77
78 static int wm8739_write(struct v4l2_subdev *sd, int reg, u16 val)
79 {
80         struct i2c_client *client = v4l2_get_subdevdata(sd);
81         int i;
82
83         if (reg < 0 || reg >= TOT_REGS) {
84                 v4l2_err(sd, "Invalid register R%d\n", reg);
85                 return -1;
86         }
87
88         v4l2_dbg(1, debug, sd, "write: %02x %02x\n", reg, val);
89
90         for (i = 0; i < 3; i++)
91                 if (i2c_smbus_write_byte_data(client,
92                                 (reg << 1) | (val >> 8), val & 0xff) == 0)
93                         return 0;
94         v4l2_err(sd, "I2C: cannot write %03x to register R%d\n", val, reg);
95         return -1;
96 }
97
98 static int wm8739_s_ctrl(struct v4l2_ctrl *ctrl)
99 {
100         struct v4l2_subdev *sd = to_sd(ctrl);
101         struct wm8739_state *state = to_state(sd);
102         unsigned int work_l, work_r;
103         u8 vol_l;       /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
104         u8 vol_r;       /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
105         u16 mute;
106
107         switch (ctrl->id) {
108         case V4L2_CID_AUDIO_VOLUME:
109                 break;
110
111         default:
112                 return -EINVAL;
113         }
114
115         /* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
116         work_l = (min(65536 - state->balance->val, 32768) * state->volume->val) / 32768;
117         work_r = (min(state->balance->val, 32768) * state->volume->val) / 32768;
118
119         vol_l = (long)work_l * 31 / 65535;
120         vol_r = (long)work_r * 31 / 65535;
121
122         /* set audio volume etc. */
123         mute = state->mute->val ? 0x80 : 0;
124
125         /* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
126          * Default setting: 0x17 = 0 dB
127          */
128         wm8739_write(sd, R0, (vol_l & 0x1f) | mute);
129         wm8739_write(sd, R1, (vol_r & 0x1f) | mute);
130         return 0;
131 }
132
133 /* ------------------------------------------------------------------------ */
134
135 static int wm8739_s_clock_freq(struct v4l2_subdev *sd, u32 audiofreq)
136 {
137         struct wm8739_state *state = to_state(sd);
138
139         state->clock_freq = audiofreq;
140         /* de-activate */
141         wm8739_write(sd, R9, 0x000);
142         switch (audiofreq) {
143         case 44100:
144                 /* 256fps, fs=44.1k */
145                 wm8739_write(sd, R8, 0x020);
146                 break;
147         case 48000:
148                 /* 256fps, fs=48k */
149                 wm8739_write(sd, R8, 0x000);
150                 break;
151         case 32000:
152                 /* 256fps, fs=32k */
153                 wm8739_write(sd, R8, 0x018);
154                 break;
155         default:
156                 break;
157         }
158         /* activate */
159         wm8739_write(sd, R9, 0x001);
160         return 0;
161 }
162
163 static int wm8739_g_chip_ident(struct v4l2_subdev *sd, struct v4l2_dbg_chip_ident *chip)
164 {
165         struct i2c_client *client = v4l2_get_subdevdata(sd);
166
167         return v4l2_chip_ident_i2c_client(client, chip, V4L2_IDENT_WM8739, 0);
168 }
169
170 static int wm8739_log_status(struct v4l2_subdev *sd)
171 {
172         struct wm8739_state *state = to_state(sd);
173
174         v4l2_info(sd, "Frequency: %u Hz\n", state->clock_freq);
175         v4l2_ctrl_handler_log_status(&state->hdl, sd->name);
176         return 0;
177 }
178
179 /* ----------------------------------------------------------------------- */
180
181 static const struct v4l2_ctrl_ops wm8739_ctrl_ops = {
182         .s_ctrl = wm8739_s_ctrl,
183 };
184
185 static const struct v4l2_subdev_core_ops wm8739_core_ops = {
186         .log_status = wm8739_log_status,
187         .g_chip_ident = wm8739_g_chip_ident,
188         .g_ext_ctrls = v4l2_subdev_g_ext_ctrls,
189         .try_ext_ctrls = v4l2_subdev_try_ext_ctrls,
190         .s_ext_ctrls = v4l2_subdev_s_ext_ctrls,
191         .g_ctrl = v4l2_subdev_g_ctrl,
192         .s_ctrl = v4l2_subdev_s_ctrl,
193         .queryctrl = v4l2_subdev_queryctrl,
194         .querymenu = v4l2_subdev_querymenu,
195 };
196
197 static const struct v4l2_subdev_audio_ops wm8739_audio_ops = {
198         .s_clock_freq = wm8739_s_clock_freq,
199 };
200
201 static const struct v4l2_subdev_ops wm8739_ops = {
202         .core = &wm8739_core_ops,
203         .audio = &wm8739_audio_ops,
204 };
205
206 /* ------------------------------------------------------------------------ */
207
208 /* i2c implementation */
209
210 static int wm8739_probe(struct i2c_client *client,
211                         const struct i2c_device_id *id)
212 {
213         struct wm8739_state *state;
214         struct v4l2_subdev *sd;
215
216         /* Check if the adapter supports the needed features */
217         if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
218                 return -EIO;
219
220         v4l_info(client, "chip found @ 0x%x (%s)\n",
221                         client->addr << 1, client->adapter->name);
222
223         state = kzalloc(sizeof(struct wm8739_state), GFP_KERNEL);
224         if (state == NULL)
225                 return -ENOMEM;
226         sd = &state->sd;
227         v4l2_i2c_subdev_init(sd, client, &wm8739_ops);
228         v4l2_ctrl_handler_init(&state->hdl, 2);
229         state->volume = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
230                         V4L2_CID_AUDIO_VOLUME, 0, 65535, 65535 / 100, 50736);
231         state->mute = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
232                         V4L2_CID_AUDIO_MUTE, 0, 1, 1, 0);
233         state->balance = v4l2_ctrl_new_std(&state->hdl, &wm8739_ctrl_ops,
234                         V4L2_CID_AUDIO_BALANCE, 0, 65535, 65535 / 100, 32768);
235         sd->ctrl_handler = &state->hdl;
236         if (state->hdl.error) {
237                 int err = state->hdl.error;
238
239                 v4l2_ctrl_handler_free(&state->hdl);
240                 kfree(state);
241                 return err;
242         }
243         v4l2_ctrl_cluster(3, &state->volume);
244
245         state->clock_freq = 48000;
246
247         /* Initialize wm8739 */
248
249         /* reset */
250         wm8739_write(sd, R15, 0x00);
251         /* filter setting, high path, offet clear */
252         wm8739_write(sd, R5, 0x000);
253         /* ADC, OSC, Power Off mode Disable */
254         wm8739_write(sd, R6, 0x000);
255         /* Digital Audio interface format:
256            Enable Master mode, 24 bit, MSB first/left justified */
257         wm8739_write(sd, R7, 0x049);
258         /* sampling control: normal, 256fs, 48KHz sampling rate */
259         wm8739_write(sd, R8, 0x000);
260         /* activate */
261         wm8739_write(sd, R9, 0x001);
262         /* set volume/mute */
263         v4l2_ctrl_handler_setup(&state->hdl);
264         return 0;
265 }
266
267 static int wm8739_remove(struct i2c_client *client)
268 {
269         struct v4l2_subdev *sd = i2c_get_clientdata(client);
270         struct wm8739_state *state = to_state(sd);
271
272         v4l2_device_unregister_subdev(sd);
273         v4l2_ctrl_handler_free(&state->hdl);
274         kfree(to_state(sd));
275         return 0;
276 }
277
278 static const struct i2c_device_id wm8739_id[] = {
279         { "wm8739", 0 },
280         { }
281 };
282 MODULE_DEVICE_TABLE(i2c, wm8739_id);
283
284 static struct i2c_driver wm8739_driver = {
285         .driver = {
286                 .owner  = THIS_MODULE,
287                 .name   = "wm8739",
288         },
289         .probe          = wm8739_probe,
290         .remove         = wm8739_remove,
291         .id_table       = wm8739_id,
292 };
293
294 static __init int init_wm8739(void)
295 {
296         return i2c_add_driver(&wm8739_driver);
297 }
298
299 static __exit void exit_wm8739(void)
300 {
301         i2c_del_driver(&wm8739_driver);
302 }
303
304 module_init(init_wm8739);
305 module_exit(exit_wm8739);