Merge branch 'master'
[linux-2.6] / drivers / media / video / cx25840 / cx25840-audio.c
1 /* cx25840 audio functions
2  *
3  * This program is free software; you can redistribute it and/or
4  * modify it under the terms of the GNU General Public License
5  * as published by the Free Software Foundation; either version 2
6  * of the License, or (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program; if not, write to the Free Software
15  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
16  */
17
18
19 #include <linux/videodev2.h>
20 #include <linux/i2c.h>
21 #include <media/v4l2-common.h>
22 #include <media/cx25840.h>
23
24 #include "cx25840-core.h"
25
26 static int set_audclk_freq(struct i2c_client *client, u32 freq)
27 {
28         struct cx25840_state *state = i2c_get_clientdata(client);
29
30         if (freq != 32000 && freq != 44100 && freq != 48000)
31                 return -EINVAL;
32
33         /* assert soft reset */
34         cx25840_and_or(client, 0x810, ~0x1, 0x01);
35
36         /* common for all inputs and rates */
37         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
38         cx25840_write(client, 0x127, 0x50);
39
40         if (state->aud_input != CX25840_AUDIO_SERIAL) {
41                 switch (freq) {
42                 case 32000:
43                         /* VID_PLL and AUX_PLL */
44                         cx25840_write4(client, 0x108, 0x0f040610);
45
46                         /* AUX_PLL_FRAC */
47                         cx25840_write4(client, 0x110, 0xee39bb01);
48
49                         /* src3/4/6_ctl = 0x0801f77f */
50                         cx25840_write4(client, 0x900, 0x7ff70108);
51                         cx25840_write4(client, 0x904, 0x7ff70108);
52                         cx25840_write4(client, 0x90c, 0x7ff70108);
53                         break;
54
55                 case 44100:
56                         /* VID_PLL and AUX_PLL */
57                         cx25840_write4(client, 0x108, 0x0f040910);
58
59                         /* AUX_PLL_FRAC */
60                         cx25840_write4(client, 0x110, 0xd66bec00);
61
62                         /* src3/4/6_ctl = 0x08016d59 */
63                         cx25840_write4(client, 0x900, 0x596d0108);
64                         cx25840_write4(client, 0x904, 0x596d0108);
65                         cx25840_write4(client, 0x90c, 0x596d0108);
66                         break;
67
68                 case 48000:
69                         /* VID_PLL and AUX_PLL */
70                         cx25840_write4(client, 0x108, 0x0f040a10);
71
72                         /* AUX_PLL_FRAC */
73                         cx25840_write4(client, 0x110, 0xe5d69800);
74
75                         /* src3/4/6_ctl = 0x08014faa */
76                         cx25840_write4(client, 0x900, 0xaa4f0108);
77                         cx25840_write4(client, 0x904, 0xaa4f0108);
78                         cx25840_write4(client, 0x90c, 0xaa4f0108);
79                         break;
80                 }
81         } else {
82                 switch (freq) {
83                 case 32000:
84                         /* VID_PLL and AUX_PLL */
85                         cx25840_write4(client, 0x108, 0x0f04081e);
86
87                         /* AUX_PLL_FRAC */
88                         cx25840_write4(client, 0x110, 0x69082a01);
89
90                         /* src1_ctl = 0x08010000 */
91                         cx25840_write4(client, 0x8f8, 0x00000108);
92
93                         /* src3/4/6_ctl = 0x08020000 */
94                         cx25840_write4(client, 0x900, 0x00000208);
95                         cx25840_write4(client, 0x904, 0x00000208);
96                         cx25840_write4(client, 0x90c, 0x00000208);
97
98                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
99                         cx25840_write(client, 0x127, 0x54);
100                         break;
101
102                 case 44100:
103                         /* VID_PLL and AUX_PLL */
104                         cx25840_write4(client, 0x108, 0x0f040918);
105
106                         /* AUX_PLL_FRAC */
107                         cx25840_write4(client, 0x110, 0xd66bec00);
108
109                         /* src1_ctl = 0x08010000 */
110                         cx25840_write4(client, 0x8f8, 0xcd600108);
111
112                         /* src3/4/6_ctl = 0x08020000 */
113                         cx25840_write4(client, 0x900, 0x85730108);
114                         cx25840_write4(client, 0x904, 0x85730108);
115                         cx25840_write4(client, 0x90c, 0x85730108);
116                         break;
117
118                 case 48000:
119                         /* VID_PLL and AUX_PLL */
120                         cx25840_write4(client, 0x108, 0x0f040a18);
121
122                         /* AUX_PLL_FRAC */
123                         cx25840_write4(client, 0x110, 0xe5d69800);
124
125                         /* src1_ctl = 0x08010000 */
126                         cx25840_write4(client, 0x8f8, 0x00800108);
127
128                         /* src3/4/6_ctl = 0x08020000 */
129                         cx25840_write4(client, 0x900, 0x55550108);
130                         cx25840_write4(client, 0x904, 0x55550108);
131                         cx25840_write4(client, 0x90c, 0x55550108);
132                         break;
133                 }
134         }
135
136         /* deassert soft reset */
137         cx25840_and_or(client, 0x810, ~0x1, 0x00);
138
139         state->audclk_freq = freq;
140
141         return 0;
142 }
143
144 void cx25840_audio_set_path(struct i2c_client *client)
145 {
146         struct cx25840_state *state = i2c_get_clientdata(client);
147
148         /* stop microcontroller */
149         cx25840_and_or(client, 0x803, ~0x10, 0);
150
151         /* Mute everything to prevent the PFFT! */
152         cx25840_write(client, 0x8d3, 0x1f);
153
154         if (state->aud_input == CX25840_AUDIO_SERIAL) {
155                 /* Set Path1 to Serial Audio Input */
156                 cx25840_write4(client, 0x8d0, 0x12100101);
157
158                 /* The microcontroller should not be started for the
159                  * non-tuner inputs: autodetection is specific for
160                  * TV audio. */
161         } else {
162                 /* Set Path1 to Analog Demod Main Channel */
163                 cx25840_write4(client, 0x8d0, 0x7038061f);
164
165                 /* When the microcontroller detects the
166                  * audio format, it will unmute the lines */
167                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
168         }
169
170         set_audclk_freq(client, state->audclk_freq);
171 }
172
173 static int get_volume(struct i2c_client *client)
174 {
175         /* Volume runs +18dB to -96dB in 1/2dB steps
176          * change to fit the msp3400 -114dB to +12dB range */
177
178         /* check PATH1_VOLUME */
179         int vol = 228 - cx25840_read(client, 0x8d4);
180         vol = (vol / 2) + 23;
181         return vol << 9;
182 }
183
184 static void set_volume(struct i2c_client *client, int volume)
185 {
186         /* First convert the volume to msp3400 values (0-127) */
187         int vol = volume >> 9;
188         /* now scale it up to cx25840 values
189          * -114dB to -96dB maps to 0
190          * this should be 19, but in my testing that was 4dB too loud */
191         if (vol <= 23) {
192                 vol = 0;
193         } else {
194                 vol -= 23;
195         }
196
197         /* PATH1_VOLUME */
198         cx25840_write(client, 0x8d4, 228 - (vol * 2));
199 }
200
201 static int get_bass(struct i2c_client *client)
202 {
203         /* bass is 49 steps +12dB to -12dB */
204
205         /* check PATH1_EQ_BASS_VOL */
206         int bass = cx25840_read(client, 0x8d9) & 0x3f;
207         bass = (((48 - bass) * 0xffff) + 47) / 48;
208         return bass;
209 }
210
211 static void set_bass(struct i2c_client *client, int bass)
212 {
213         /* PATH1_EQ_BASS_VOL */
214         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
215 }
216
217 static int get_treble(struct i2c_client *client)
218 {
219         /* treble is 49 steps +12dB to -12dB */
220
221         /* check PATH1_EQ_TREBLE_VOL */
222         int treble = cx25840_read(client, 0x8db) & 0x3f;
223         treble = (((48 - treble) * 0xffff) + 47) / 48;
224         return treble;
225 }
226
227 static void set_treble(struct i2c_client *client, int treble)
228 {
229         /* PATH1_EQ_TREBLE_VOL */
230         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
231 }
232
233 static int get_balance(struct i2c_client *client)
234 {
235         /* balance is 7 bit, 0 to -96dB */
236
237         /* check PATH1_BAL_LEVEL */
238         int balance = cx25840_read(client, 0x8d5) & 0x7f;
239         /* check PATH1_BAL_LEFT */
240         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
241                 balance = 0x80 - balance;
242         else
243                 balance = 0x80 + balance;
244         return balance << 8;
245 }
246
247 static void set_balance(struct i2c_client *client, int balance)
248 {
249         int bal = balance >> 8;
250         if (bal > 0x80) {
251                 /* PATH1_BAL_LEFT */
252                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
253                 /* PATH1_BAL_LEVEL */
254                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
255         } else {
256                 /* PATH1_BAL_LEFT */
257                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
258                 /* PATH1_BAL_LEVEL */
259                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
260         }
261 }
262
263 static int get_mute(struct i2c_client *client)
264 {
265         /* check SRC1_MUTE_EN */
266         return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
267 }
268
269 static void set_mute(struct i2c_client *client, int mute)
270 {
271         struct cx25840_state *state = i2c_get_clientdata(client);
272
273         if (state->aud_input != CX25840_AUDIO_SERIAL) {
274                 /* Must turn off microcontroller in order to mute sound.
275                  * Not sure if this is the best method, but it does work.
276                  * If the microcontroller is running, then it will undo any
277                  * changes to the mute register. */
278                 if (mute) {
279                         /* disable microcontroller */
280                         cx25840_and_or(client, 0x803, ~0x10, 0x00);
281                         cx25840_write(client, 0x8d3, 0x1f);
282                 } else {
283                         /* enable microcontroller */
284                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
285                 }
286         } else {
287                 /* SRC1_MUTE_EN */
288                 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
289         }
290 }
291
292 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
293 {
294         struct v4l2_control *ctrl = arg;
295
296         switch (cmd) {
297         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
298                 return set_audclk_freq(client, *(u32 *)arg);
299
300         case VIDIOC_G_CTRL:
301                 switch (ctrl->id) {
302                 case V4L2_CID_AUDIO_VOLUME:
303                         ctrl->value = get_volume(client);
304                         break;
305                 case V4L2_CID_AUDIO_BASS:
306                         ctrl->value = get_bass(client);
307                         break;
308                 case V4L2_CID_AUDIO_TREBLE:
309                         ctrl->value = get_treble(client);
310                         break;
311                 case V4L2_CID_AUDIO_BALANCE:
312                         ctrl->value = get_balance(client);
313                         break;
314                 case V4L2_CID_AUDIO_MUTE:
315                         ctrl->value = get_mute(client);
316                         break;
317                 default:
318                         return -EINVAL;
319                 }
320                 break;
321
322         case VIDIOC_S_CTRL:
323                 switch (ctrl->id) {
324                 case V4L2_CID_AUDIO_VOLUME:
325                         set_volume(client, ctrl->value);
326                         break;
327                 case V4L2_CID_AUDIO_BASS:
328                         set_bass(client, ctrl->value);
329                         break;
330                 case V4L2_CID_AUDIO_TREBLE:
331                         set_treble(client, ctrl->value);
332                         break;
333                 case V4L2_CID_AUDIO_BALANCE:
334                         set_balance(client, ctrl->value);
335                         break;
336                 case V4L2_CID_AUDIO_MUTE:
337                         set_mute(client, ctrl->value);
338                         break;
339                 default:
340                         return -EINVAL;
341                 }
342                 break;
343
344         default:
345                 return -EINVAL;
346         }
347
348         return 0;
349 }