Merge branch 'upstream' of git://lost.foo-projects.org/~ahkok/git/netdev-2.6 into...
[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         /* common for all inputs and rates */
34         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
35         cx25840_write(client, 0x127, 0x50);
36
37         if (state->aud_input != CX25840_AUDIO_SERIAL) {
38                 switch (freq) {
39                 case 32000:
40                         /* VID_PLL and AUX_PLL */
41                         cx25840_write4(client, 0x108, 0x0f040610);
42
43                         /* AUX_PLL_FRAC */
44                         cx25840_write4(client, 0x110, 0xee39bb01);
45
46                         if (state->is_cx25836)
47                                 break;
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                         if (state->is_cx25836)
63                                 break;
64
65                         /* src3/4/6_ctl = 0x08016d59 */
66                         cx25840_write4(client, 0x900, 0x596d0108);
67                         cx25840_write4(client, 0x904, 0x596d0108);
68                         cx25840_write4(client, 0x90c, 0x596d0108);
69                         break;
70
71                 case 48000:
72                         /* VID_PLL and AUX_PLL */
73                         cx25840_write4(client, 0x108, 0x0f040a10);
74
75                         /* AUX_PLL_FRAC */
76                         cx25840_write4(client, 0x110, 0xe5d69800);
77
78                         if (state->is_cx25836)
79                                 break;
80
81                         /* src3/4/6_ctl = 0x08014faa */
82                         cx25840_write4(client, 0x900, 0xaa4f0108);
83                         cx25840_write4(client, 0x904, 0xaa4f0108);
84                         cx25840_write4(client, 0x90c, 0xaa4f0108);
85                         break;
86                 }
87         } else {
88                 switch (freq) {
89                 case 32000:
90                         /* VID_PLL and AUX_PLL */
91                         cx25840_write4(client, 0x108, 0x0f04081e);
92
93                         /* AUX_PLL_FRAC */
94                         cx25840_write4(client, 0x110, 0x69082a01);
95
96                         if (state->is_cx25836)
97                                 break;
98
99                         /* src1_ctl = 0x08010000 */
100                         cx25840_write4(client, 0x8f8, 0x00000108);
101
102                         /* src3/4/6_ctl = 0x08020000 */
103                         cx25840_write4(client, 0x900, 0x00000208);
104                         cx25840_write4(client, 0x904, 0x00000208);
105                         cx25840_write4(client, 0x90c, 0x00000208);
106
107                         /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
108                         cx25840_write(client, 0x127, 0x54);
109                         break;
110
111                 case 44100:
112                         /* VID_PLL and AUX_PLL */
113                         cx25840_write4(client, 0x108, 0x0f040918);
114
115                         /* AUX_PLL_FRAC */
116                         cx25840_write4(client, 0x110, 0xd66bec00);
117
118                         if (state->is_cx25836)
119                                 break;
120
121                         /* src1_ctl = 0x08010000 */
122                         cx25840_write4(client, 0x8f8, 0xcd600108);
123
124                         /* src3/4/6_ctl = 0x08020000 */
125                         cx25840_write4(client, 0x900, 0x85730108);
126                         cx25840_write4(client, 0x904, 0x85730108);
127                         cx25840_write4(client, 0x90c, 0x85730108);
128                         break;
129
130                 case 48000:
131                         /* VID_PLL and AUX_PLL */
132                         cx25840_write4(client, 0x108, 0x0f040a18);
133
134                         /* AUX_PLL_FRAC */
135                         cx25840_write4(client, 0x110, 0xe5d69800);
136
137                         if (state->is_cx25836)
138                                 break;
139
140                         /* src1_ctl = 0x08010000 */
141                         cx25840_write4(client, 0x8f8, 0x00800108);
142
143                         /* src3/4/6_ctl = 0x08020000 */
144                         cx25840_write4(client, 0x900, 0x55550108);
145                         cx25840_write4(client, 0x904, 0x55550108);
146                         cx25840_write4(client, 0x90c, 0x55550108);
147                         break;
148                 }
149         }
150
151         state->audclk_freq = freq;
152
153         return 0;
154 }
155
156 void cx25840_audio_set_path(struct i2c_client *client)
157 {
158         struct cx25840_state *state = i2c_get_clientdata(client);
159
160         /* stop microcontroller */
161         cx25840_and_or(client, 0x803, ~0x10, 0);
162
163         /* assert soft reset */
164         if (!state->is_cx25836)
165                 cx25840_and_or(client, 0x810, ~0x1, 0x01);
166
167         /* Mute everything to prevent the PFFT! */
168         cx25840_write(client, 0x8d3, 0x1f);
169
170         if (state->aud_input == CX25840_AUDIO_SERIAL) {
171                 /* Set Path1 to Serial Audio Input */
172                 cx25840_write4(client, 0x8d0, 0x12100101);
173
174                 /* The microcontroller should not be started for the
175                  * non-tuner inputs: autodetection is specific for
176                  * TV audio. */
177         } else {
178                 /* Set Path1 to Analog Demod Main Channel */
179                 cx25840_write4(client, 0x8d0, 0x7038061f);
180         }
181
182         set_audclk_freq(client, state->audclk_freq);
183
184         /* deassert soft reset */
185         if (!state->is_cx25836)
186                 cx25840_and_or(client, 0x810, ~0x1, 0x00);
187
188         if (state->aud_input != CX25840_AUDIO_SERIAL) {
189                 /* When the microcontroller detects the
190                  * audio format, it will unmute the lines */
191                 cx25840_and_or(client, 0x803, ~0x10, 0x10);
192         }
193 }
194
195 static int get_volume(struct i2c_client *client)
196 {
197         /* Volume runs +18dB to -96dB in 1/2dB steps
198          * change to fit the msp3400 -114dB to +12dB range */
199
200         /* check PATH1_VOLUME */
201         int vol = 228 - cx25840_read(client, 0x8d4);
202         vol = (vol / 2) + 23;
203         return vol << 9;
204 }
205
206 static void set_volume(struct i2c_client *client, int volume)
207 {
208         /* First convert the volume to msp3400 values (0-127) */
209         int vol = volume >> 9;
210         /* now scale it up to cx25840 values
211          * -114dB to -96dB maps to 0
212          * this should be 19, but in my testing that was 4dB too loud */
213         if (vol <= 23) {
214                 vol = 0;
215         } else {
216                 vol -= 23;
217         }
218
219         /* PATH1_VOLUME */
220         cx25840_write(client, 0x8d4, 228 - (vol * 2));
221 }
222
223 static int get_bass(struct i2c_client *client)
224 {
225         /* bass is 49 steps +12dB to -12dB */
226
227         /* check PATH1_EQ_BASS_VOL */
228         int bass = cx25840_read(client, 0x8d9) & 0x3f;
229         bass = (((48 - bass) * 0xffff) + 47) / 48;
230         return bass;
231 }
232
233 static void set_bass(struct i2c_client *client, int bass)
234 {
235         /* PATH1_EQ_BASS_VOL */
236         cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
237 }
238
239 static int get_treble(struct i2c_client *client)
240 {
241         /* treble is 49 steps +12dB to -12dB */
242
243         /* check PATH1_EQ_TREBLE_VOL */
244         int treble = cx25840_read(client, 0x8db) & 0x3f;
245         treble = (((48 - treble) * 0xffff) + 47) / 48;
246         return treble;
247 }
248
249 static void set_treble(struct i2c_client *client, int treble)
250 {
251         /* PATH1_EQ_TREBLE_VOL */
252         cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
253 }
254
255 static int get_balance(struct i2c_client *client)
256 {
257         /* balance is 7 bit, 0 to -96dB */
258
259         /* check PATH1_BAL_LEVEL */
260         int balance = cx25840_read(client, 0x8d5) & 0x7f;
261         /* check PATH1_BAL_LEFT */
262         if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
263                 balance = 0x80 - balance;
264         else
265                 balance = 0x80 + balance;
266         return balance << 8;
267 }
268
269 static void set_balance(struct i2c_client *client, int balance)
270 {
271         int bal = balance >> 8;
272         if (bal > 0x80) {
273                 /* PATH1_BAL_LEFT */
274                 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
275                 /* PATH1_BAL_LEVEL */
276                 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
277         } else {
278                 /* PATH1_BAL_LEFT */
279                 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
280                 /* PATH1_BAL_LEVEL */
281                 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
282         }
283 }
284
285 static int get_mute(struct i2c_client *client)
286 {
287         /* check SRC1_MUTE_EN */
288         return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
289 }
290
291 static void set_mute(struct i2c_client *client, int mute)
292 {
293         struct cx25840_state *state = i2c_get_clientdata(client);
294
295         if (state->aud_input != CX25840_AUDIO_SERIAL) {
296                 /* Must turn off microcontroller in order to mute sound.
297                  * Not sure if this is the best method, but it does work.
298                  * If the microcontroller is running, then it will undo any
299                  * changes to the mute register. */
300                 if (mute) {
301                         /* disable microcontroller */
302                         cx25840_and_or(client, 0x803, ~0x10, 0x00);
303                         cx25840_write(client, 0x8d3, 0x1f);
304                 } else {
305                         /* enable microcontroller */
306                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
307                 }
308         } else {
309                 /* SRC1_MUTE_EN */
310                 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
311         }
312 }
313
314 int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
315 {
316         struct cx25840_state *state = i2c_get_clientdata(client);
317         struct v4l2_control *ctrl = arg;
318         int retval;
319
320         switch (cmd) {
321         case VIDIOC_INT_AUDIO_CLOCK_FREQ:
322                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
323                         cx25840_and_or(client, 0x803, ~0x10, 0);
324                         cx25840_write(client, 0x8d3, 0x1f);
325                 }
326                 if (!state->is_cx25836)
327                         cx25840_and_or(client, 0x810, ~0x1, 1);
328                 retval = set_audclk_freq(client, *(u32 *)arg);
329                 if (!state->is_cx25836)
330                         cx25840_and_or(client, 0x810, ~0x1, 0);
331                 if (state->aud_input != CX25840_AUDIO_SERIAL) {
332                         cx25840_and_or(client, 0x803, ~0x10, 0x10);
333                 }
334                 return retval;
335
336         case VIDIOC_G_CTRL:
337                 switch (ctrl->id) {
338                 case V4L2_CID_AUDIO_VOLUME:
339                         ctrl->value = get_volume(client);
340                         break;
341                 case V4L2_CID_AUDIO_BASS:
342                         ctrl->value = get_bass(client);
343                         break;
344                 case V4L2_CID_AUDIO_TREBLE:
345                         ctrl->value = get_treble(client);
346                         break;
347                 case V4L2_CID_AUDIO_BALANCE:
348                         ctrl->value = get_balance(client);
349                         break;
350                 case V4L2_CID_AUDIO_MUTE:
351                         ctrl->value = get_mute(client);
352                         break;
353                 default:
354                         return -EINVAL;
355                 }
356                 break;
357
358         case VIDIOC_S_CTRL:
359                 switch (ctrl->id) {
360                 case V4L2_CID_AUDIO_VOLUME:
361                         set_volume(client, ctrl->value);
362                         break;
363                 case V4L2_CID_AUDIO_BASS:
364                         set_bass(client, ctrl->value);
365                         break;
366                 case V4L2_CID_AUDIO_TREBLE:
367                         set_treble(client, ctrl->value);
368                         break;
369                 case V4L2_CID_AUDIO_BALANCE:
370                         set_balance(client, ctrl->value);
371                         break;
372                 case V4L2_CID_AUDIO_MUTE:
373                         set_mute(client, ctrl->value);
374                         break;
375                 default:
376                         return -EINVAL;
377                 }
378                 break;
379
380         default:
381                 return -EINVAL;
382         }
383
384         return 0;
385 }