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Diffstat (limited to 'drivers/media/video/cx25840/cx25840-audio.c')
-rw-r--r--drivers/media/video/cx25840/cx25840-audio.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/drivers/media/video/cx25840/cx25840-audio.c b/drivers/media/video/cx25840/cx25840-audio.c
new file mode 100644
index 000000000000..740908f8027d
--- /dev/null
+++ b/drivers/media/video/cx25840/cx25840-audio.c
@@ -0,0 +1,368 @@
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/audiochip.h>
22#include <media/v4l2-common.h>
23
24#include "cx25840.h"
25
26inline static int set_audclk_freq(struct i2c_client *client,
27 enum v4l2_audio_clock_freq freq)
28{
29 struct cx25840_state *state = i2c_get_clientdata(client);
30
31 /* assert soft reset */
32 cx25840_and_or(client, 0x810, ~0x1, 0x01);
33
34 /* common for all inputs and rates */
35 /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x10 */
36 cx25840_write(client, 0x127, 0x50);
37
38 switch (state->audio_input) {
39 case AUDIO_TUNER:
40 switch (freq) {
41 case V4L2_AUDCLK_32_KHZ:
42 /* VID_PLL and AUX_PLL */
43 cx25840_write4(client, 0x108, 0x0f040610);
44
45 /* AUX_PLL_FRAC */
46 cx25840_write4(client, 0x110, 0xee39bb01);
47
48 /* src3/4/6_ctl = 0x0801f77f */
49 cx25840_write4(client, 0x900, 0x7ff70108);
50 cx25840_write4(client, 0x904, 0x7ff70108);
51 cx25840_write4(client, 0x90c, 0x7ff70108);
52 break;
53
54 case V4L2_AUDCLK_441_KHZ:
55 /* VID_PLL and AUX_PLL */
56 cx25840_write4(client, 0x108, 0x0f040910);
57
58 /* AUX_PLL_FRAC */
59 cx25840_write4(client, 0x110, 0xd66bec00);
60
61 /* src3/4/6_ctl = 0x08016d59 */
62 cx25840_write4(client, 0x900, 0x596d0108);
63 cx25840_write4(client, 0x904, 0x596d0108);
64 cx25840_write4(client, 0x90c, 0x596d0108);
65 break;
66
67 case V4L2_AUDCLK_48_KHZ:
68 /* VID_PLL and AUX_PLL */
69 cx25840_write4(client, 0x108, 0x0f040a10);
70
71 /* AUX_PLL_FRAC */
72 cx25840_write4(client, 0x110, 0xe5d69800);
73
74 /* src3/4/6_ctl = 0x08014faa */
75 cx25840_write4(client, 0x900, 0xaa4f0108);
76 cx25840_write4(client, 0x904, 0xaa4f0108);
77 cx25840_write4(client, 0x90c, 0xaa4f0108);
78 break;
79 }
80 break;
81
82 case AUDIO_EXTERN_1:
83 case AUDIO_EXTERN_2:
84 case AUDIO_INTERN:
85 case AUDIO_RADIO:
86 switch (freq) {
87 case V4L2_AUDCLK_32_KHZ:
88 /* VID_PLL and AUX_PLL */
89 cx25840_write4(client, 0x108, 0x0f04081e);
90
91 /* AUX_PLL_FRAC */
92 cx25840_write4(client, 0x110, 0x69082a01);
93
94 /* src1_ctl = 0x08010000 */
95 cx25840_write4(client, 0x8f8, 0x00000108);
96
97 /* src3/4/6_ctl = 0x08020000 */
98 cx25840_write4(client, 0x900, 0x00000208);
99 cx25840_write4(client, 0x904, 0x00000208);
100 cx25840_write4(client, 0x90c, 0x00000208);
101
102 /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
103 cx25840_write(client, 0x127, 0x54);
104 break;
105
106 case V4L2_AUDCLK_441_KHZ:
107 /* VID_PLL and AUX_PLL */
108 cx25840_write4(client, 0x108, 0x0f040918);
109
110 /* AUX_PLL_FRAC */
111 cx25840_write4(client, 0x110, 0xd66bec00);
112
113 /* src1_ctl = 0x08010000 */
114 cx25840_write4(client, 0x8f8, 0xcd600108);
115
116 /* src3/4/6_ctl = 0x08020000 */
117 cx25840_write4(client, 0x900, 0x85730108);
118 cx25840_write4(client, 0x904, 0x85730108);
119 cx25840_write4(client, 0x90c, 0x85730108);
120 break;
121
122 case V4L2_AUDCLK_48_KHZ:
123 /* VID_PLL and AUX_PLL */
124 cx25840_write4(client, 0x108, 0x0f040a18);
125
126 /* AUX_PLL_FRAC */
127 cx25840_write4(client, 0x110, 0xe5d69800);
128
129 /* src1_ctl = 0x08010000 */
130 cx25840_write4(client, 0x8f8, 0x00800108);
131
132 /* src3/4/6_ctl = 0x08020000 */
133 cx25840_write4(client, 0x900, 0x55550108);
134 cx25840_write4(client, 0x904, 0x55550108);
135 cx25840_write4(client, 0x90c, 0x55550108);
136 break;
137 }
138 break;
139 }
140
141 /* deassert soft reset */
142 cx25840_and_or(client, 0x810, ~0x1, 0x00);
143
144 state->audclk_freq = freq;
145
146 return 0;
147}
148
149static int set_input(struct i2c_client *client, int audio_input)
150{
151 struct cx25840_state *state = i2c_get_clientdata(client);
152
153 cx25840_dbg("set audio input (%d)\n", audio_input);
154
155 /* stop microcontroller */
156 cx25840_and_or(client, 0x803, ~0x10, 0);
157
158 /* Mute everything to prevent the PFFT! */
159 cx25840_write(client, 0x8d3, 0x1f);
160
161 switch (audio_input) {
162 case AUDIO_TUNER:
163 /* Set Path1 to Analog Demod Main Channel */
164 cx25840_write4(client, 0x8d0, 0x7038061f);
165
166 /* When the microcontroller detects the
167 * audio format, it will unmute the lines */
168 cx25840_and_or(client, 0x803, ~0x10, 0x10);
169 break;
170
171 case AUDIO_EXTERN_1:
172 case AUDIO_EXTERN_2:
173 case AUDIO_INTERN:
174 case AUDIO_RADIO:
175 /* Set Path1 to Serial Audio Input */
176 cx25840_write4(client, 0x8d0, 0x12100101);
177
178 /* The microcontroller should not be started for the
179 * non-tuner inputs: autodetection is specific for
180 * TV audio. */
181 break;
182
183 default:
184 cx25840_dbg("Invalid audio input selection %d\n", audio_input);
185 return -EINVAL;
186 }
187
188 state->audio_input = audio_input;
189
190 return set_audclk_freq(client, state->audclk_freq);
191}
192
193inline static int get_volume(struct i2c_client *client)
194{
195 /* Volume runs +18dB to -96dB in 1/2dB steps
196 * change to fit the msp3400 -114dB to +12dB range */
197
198 /* check PATH1_VOLUME */
199 int vol = 228 - cx25840_read(client, 0x8d4);
200 vol = (vol / 2) + 23;
201 return vol << 9;
202}
203
204inline static void set_volume(struct i2c_client *client, int volume)
205{
206 /* First convert the volume to msp3400 values (0-127) */
207 int vol = volume >> 9;
208 /* now scale it up to cx25840 values
209 * -114dB to -96dB maps to 0
210 * this should be 19, but in my testing that was 4dB too loud */
211 if (vol <= 23) {
212 vol = 0;
213 } else {
214 vol -= 23;
215 }
216
217 /* PATH1_VOLUME */
218 cx25840_write(client, 0x8d4, 228 - (vol * 2));
219}
220
221inline static int get_bass(struct i2c_client *client)
222{
223 /* bass is 49 steps +12dB to -12dB */
224
225 /* check PATH1_EQ_BASS_VOL */
226 int bass = cx25840_read(client, 0x8d9) & 0x3f;
227 bass = (((48 - bass) * 0xffff) + 47) / 48;
228 return bass;
229}
230
231inline static void set_bass(struct i2c_client *client, int bass)
232{
233 /* PATH1_EQ_BASS_VOL */
234 cx25840_and_or(client, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
235}
236
237inline static int get_treble(struct i2c_client *client)
238{
239 /* treble is 49 steps +12dB to -12dB */
240
241 /* check PATH1_EQ_TREBLE_VOL */
242 int treble = cx25840_read(client, 0x8db) & 0x3f;
243 treble = (((48 - treble) * 0xffff) + 47) / 48;
244 return treble;
245}
246
247inline static void set_treble(struct i2c_client *client, int treble)
248{
249 /* PATH1_EQ_TREBLE_VOL */
250 cx25840_and_or(client, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
251}
252
253inline static int get_balance(struct i2c_client *client)
254{
255 /* balance is 7 bit, 0 to -96dB */
256
257 /* check PATH1_BAL_LEVEL */
258 int balance = cx25840_read(client, 0x8d5) & 0x7f;
259 /* check PATH1_BAL_LEFT */
260 if ((cx25840_read(client, 0x8d5) & 0x80) == 0)
261 balance = 0x80 - balance;
262 else
263 balance = 0x80 + balance;
264 return balance << 8;
265}
266
267inline static void set_balance(struct i2c_client *client, int balance)
268{
269 int bal = balance >> 8;
270 if (bal > 0x80) {
271 /* PATH1_BAL_LEFT */
272 cx25840_and_or(client, 0x8d5, 0x7f, 0x80);
273 /* PATH1_BAL_LEVEL */
274 cx25840_and_or(client, 0x8d5, ~0x7f, bal & 0x7f);
275 } else {
276 /* PATH1_BAL_LEFT */
277 cx25840_and_or(client, 0x8d5, 0x7f, 0x00);
278 /* PATH1_BAL_LEVEL */
279 cx25840_and_or(client, 0x8d5, ~0x7f, 0x80 - bal);
280 }
281}
282
283inline static int get_mute(struct i2c_client *client)
284{
285 /* check SRC1_MUTE_EN */
286 return cx25840_read(client, 0x8d3) & 0x2 ? 1 : 0;
287}
288
289inline static void set_mute(struct i2c_client *client, int mute)
290{
291 struct cx25840_state *state = i2c_get_clientdata(client);
292
293 if (state->audio_input == AUDIO_TUNER) {
294 /* Must turn off microcontroller in order to mute sound.
295 * Not sure if this is the best method, but it does work.
296 * If the microcontroller is running, then it will undo any
297 * changes to the mute register. */
298 if (mute) {
299 /* disable microcontroller */
300 cx25840_and_or(client, 0x803, ~0x10, 0x00);
301 cx25840_write(client, 0x8d3, 0x1f);
302 } else {
303 /* enable microcontroller */
304 cx25840_and_or(client, 0x803, ~0x10, 0x10);
305 }
306 } else {
307 /* SRC1_MUTE_EN */
308 cx25840_and_or(client, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
309 }
310}
311
312int cx25840_audio(struct i2c_client *client, unsigned int cmd, void *arg)
313{
314 struct v4l2_control *ctrl = arg;
315
316 switch (cmd) {
317 case AUDC_SET_INPUT:
318 return set_input(client, *(int *)arg);
319 case VIDIOC_INT_AUDIO_CLOCK_FREQ:
320 return set_audclk_freq(client, *(enum v4l2_audio_clock_freq *)arg);
321 case VIDIOC_G_CTRL:
322 switch (ctrl->id) {
323 case V4L2_CID_AUDIO_VOLUME:
324 ctrl->value = get_volume(client);
325 break;
326 case V4L2_CID_AUDIO_BASS:
327 ctrl->value = get_bass(client);
328 break;
329 case V4L2_CID_AUDIO_TREBLE:
330 ctrl->value = get_treble(client);
331 break;
332 case V4L2_CID_AUDIO_BALANCE:
333 ctrl->value = get_balance(client);
334 break;
335 case V4L2_CID_AUDIO_MUTE:
336 ctrl->value = get_mute(client);
337 break;
338 default:
339 return -EINVAL;
340 }
341 break;
342 case VIDIOC_S_CTRL:
343 switch (ctrl->id) {
344 case V4L2_CID_AUDIO_VOLUME:
345 set_volume(client, ctrl->value);
346 break;
347 case V4L2_CID_AUDIO_BASS:
348 set_bass(client, ctrl->value);
349 break;
350 case V4L2_CID_AUDIO_TREBLE:
351 set_treble(client, ctrl->value);
352 break;
353 case V4L2_CID_AUDIO_BALANCE:
354 set_balance(client, ctrl->value);
355 break;
356 case V4L2_CID_AUDIO_MUTE:
357 set_mute(client, ctrl->value);
358 break;
359 default:
360 return -EINVAL;
361 }
362 break;
363 default:
364 return -EINVAL;
365 }
366
367 return 0;
368}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-11 14:33:58 -0500