4 * Copyright (C) 2005 T. Adachi <tadachi@tadachi-net.com>
6 * Copyright (C) 2005 Hans Verkuil <hverkuil@xs4all.nl>
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.
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.
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.
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-i2c-drv.h>
34 #include <media/v4l2-ctrls.h>
36 MODULE_DESCRIPTION("wm8739 driver");
37 MODULE_AUTHOR("T. Adachi, Hans Verkuil");
38 MODULE_LICENSE("GPL");
42 module_param(debug
, int, 0644);
44 MODULE_PARM_DESC(debug
, "Debug level (0-1)");
47 /* ------------------------------------------------------------------------ */
51 R5
= 5, R6
, R7
, R8
, R9
, R15
= 15,
56 struct v4l2_subdev sd
;
57 struct v4l2_ctrl_handler hdl
;
60 struct v4l2_ctrl
*volume
;
61 struct v4l2_ctrl
*mute
;
62 struct v4l2_ctrl
*balance
;
67 static inline struct wm8739_state
*to_state(struct v4l2_subdev
*sd
)
69 return container_of(sd
, struct wm8739_state
, sd
);
72 static inline struct v4l2_subdev
*to_sd(struct v4l2_ctrl
*ctrl
)
74 return &container_of(ctrl
->handler
, struct wm8739_state
, hdl
)->sd
;
77 /* ------------------------------------------------------------------------ */
79 static int wm8739_write(struct v4l2_subdev
*sd
, int reg
, u16 val
)
81 struct i2c_client
*client
= v4l2_get_subdevdata(sd
);
84 if (reg
< 0 || reg
>= TOT_REGS
) {
85 v4l2_err(sd
, "Invalid register R%d\n", reg
);
89 v4l2_dbg(1, debug
, sd
, "write: %02x %02x\n", reg
, val
);
91 for (i
= 0; i
< 3; i
++)
92 if (i2c_smbus_write_byte_data(client
,
93 (reg
<< 1) | (val
>> 8), val
& 0xff) == 0)
95 v4l2_err(sd
, "I2C: cannot write %03x to register R%d\n", val
, reg
);
99 static int wm8739_s_ctrl(struct v4l2_ctrl
*ctrl
)
101 struct v4l2_subdev
*sd
= to_sd(ctrl
);
102 struct wm8739_state
*state
= to_state(sd
);
103 unsigned int work_l
, work_r
;
104 u8 vol_l
; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
105 u8 vol_r
; /* +12dB to -34.5dB 1.5dB step (5bit) def:0dB */
109 case V4L2_CID_AUDIO_VOLUME
:
116 /* normalize ( 65535 to 0 -> 31 to 0 (12dB to -34.5dB) ) */
117 work_l
= (min(65536 - state
->balance
->val
, 32768) * state
->volume
->val
) / 32768;
118 work_r
= (min(state
->balance
->val
, 32768) * state
->volume
->val
) / 32768;
120 vol_l
= (long)work_l
* 31 / 65535;
121 vol_r
= (long)work_r
* 31 / 65535;
123 /* set audio volume etc. */
124 mute
= state
->mute
->val
? 0x80 : 0;
126 /* Volume setting: bits 0-4, 0x1f = 12 dB, 0x00 = -34.5 dB
127 * Default setting: 0x17 = 0 dB
129 wm8739_write(sd
, R0
, (vol_l
& 0x1f) | mute
);
130 wm8739_write(sd
, R1
, (vol_r
& 0x1f) | mute
);
134 /* ------------------------------------------------------------------------ */
136 static int wm8739_s_clock_freq(struct v4l2_subdev
*sd
, u32 audiofreq
)
138 struct wm8739_state
*state
= to_state(sd
);
140 state
->clock_freq
= audiofreq
;
142 wm8739_write(sd
, R9
, 0x000);
145 /* 256fps, fs=44.1k */
146 wm8739_write(sd
, R8
, 0x020);
150 wm8739_write(sd
, R8
, 0x000);
154 wm8739_write(sd
, R8
, 0x018);
160 wm8739_write(sd
, R9
, 0x001);
164 static int wm8739_g_chip_ident(struct v4l2_subdev
*sd
, struct v4l2_dbg_chip_ident
*chip
)
166 struct i2c_client
*client
= v4l2_get_subdevdata(sd
);
168 return v4l2_chip_ident_i2c_client(client
, chip
, V4L2_IDENT_WM8739
, 0);
171 static int wm8739_log_status(struct v4l2_subdev
*sd
)
173 struct wm8739_state
*state
= to_state(sd
);
175 v4l2_info(sd
, "Frequency: %u Hz\n", state
->clock_freq
);
176 v4l2_ctrl_handler_log_status(&state
->hdl
, sd
->name
);
180 /* ----------------------------------------------------------------------- */
182 static const struct v4l2_ctrl_ops wm8739_ctrl_ops
= {
183 .s_ctrl
= wm8739_s_ctrl
,
186 static const struct v4l2_subdev_core_ops wm8739_core_ops
= {
187 .log_status
= wm8739_log_status
,
188 .g_chip_ident
= wm8739_g_chip_ident
,
189 .g_ext_ctrls
= v4l2_subdev_g_ext_ctrls
,
190 .try_ext_ctrls
= v4l2_subdev_try_ext_ctrls
,
191 .s_ext_ctrls
= v4l2_subdev_s_ext_ctrls
,
192 .g_ctrl
= v4l2_subdev_g_ctrl
,
193 .s_ctrl
= v4l2_subdev_s_ctrl
,
194 .queryctrl
= v4l2_subdev_queryctrl
,
195 .querymenu
= v4l2_subdev_querymenu
,
198 static const struct v4l2_subdev_audio_ops wm8739_audio_ops
= {
199 .s_clock_freq
= wm8739_s_clock_freq
,
202 static const struct v4l2_subdev_ops wm8739_ops
= {
203 .core
= &wm8739_core_ops
,
204 .audio
= &wm8739_audio_ops
,
207 /* ------------------------------------------------------------------------ */
209 /* i2c implementation */
211 static int wm8739_probe(struct i2c_client
*client
,
212 const struct i2c_device_id
*id
)
214 struct wm8739_state
*state
;
215 struct v4l2_subdev
*sd
;
217 /* Check if the adapter supports the needed features */
218 if (!i2c_check_functionality(client
->adapter
, I2C_FUNC_SMBUS_BYTE_DATA
))
221 v4l_info(client
, "chip found @ 0x%x (%s)\n",
222 client
->addr
<< 1, client
->adapter
->name
);
224 state
= kzalloc(sizeof(struct wm8739_state
), GFP_KERNEL
);
228 v4l2_i2c_subdev_init(sd
, client
, &wm8739_ops
);
229 v4l2_ctrl_handler_init(&state
->hdl
, 2);
230 state
->volume
= v4l2_ctrl_new_std(&state
->hdl
, &wm8739_ctrl_ops
,
231 V4L2_CID_AUDIO_VOLUME
, 0, 65535, 65535 / 100, 50736);
232 state
->mute
= v4l2_ctrl_new_std(&state
->hdl
, &wm8739_ctrl_ops
,
233 V4L2_CID_AUDIO_MUTE
, 0, 1, 1, 0);
234 state
->balance
= v4l2_ctrl_new_std(&state
->hdl
, &wm8739_ctrl_ops
,
235 V4L2_CID_AUDIO_BALANCE
, 0, 65535, 65535 / 100, 32768);
236 sd
->ctrl_handler
= &state
->hdl
;
237 if (state
->hdl
.error
) {
238 int err
= state
->hdl
.error
;
240 v4l2_ctrl_handler_free(&state
->hdl
);
244 v4l2_ctrl_cluster(3, &state
->volume
);
246 state
->clock_freq
= 48000;
248 /* Initialize wm8739 */
251 wm8739_write(sd
, R15
, 0x00);
252 /* filter setting, high path, offet clear */
253 wm8739_write(sd
, R5
, 0x000);
254 /* ADC, OSC, Power Off mode Disable */
255 wm8739_write(sd
, R6
, 0x000);
256 /* Digital Audio interface format:
257 Enable Master mode, 24 bit, MSB first/left justified */
258 wm8739_write(sd
, R7
, 0x049);
259 /* sampling control: normal, 256fs, 48KHz sampling rate */
260 wm8739_write(sd
, R8
, 0x000);
262 wm8739_write(sd
, R9
, 0x001);
263 /* set volume/mute */
264 v4l2_ctrl_handler_setup(&state
->hdl
);
268 static int wm8739_remove(struct i2c_client
*client
)
270 struct v4l2_subdev
*sd
= i2c_get_clientdata(client
);
271 struct wm8739_state
*state
= to_state(sd
);
273 v4l2_device_unregister_subdev(sd
);
274 v4l2_ctrl_handler_free(&state
->hdl
);
279 static const struct i2c_device_id wm8739_id
[] = {
283 MODULE_DEVICE_TABLE(i2c
, wm8739_id
);
285 static struct v4l2_i2c_driver_data v4l2_i2c_data
= {
287 .probe
= wm8739_probe
,
288 .remove
= wm8739_remove
,
289 .id_table
= wm8739_id
,