aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/media/video/cx18/cx18-av-audio.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/media/video/cx18/cx18-av-audio.c')
-rw-r--r--drivers/media/video/cx18/cx18-av-audio.c361
1 files changed, 361 insertions, 0 deletions
diff --git a/drivers/media/video/cx18/cx18-av-audio.c b/drivers/media/video/cx18/cx18-av-audio.c
new file mode 100644
index 000000000000..2dc3a5dd170e
--- /dev/null
+++ b/drivers/media/video/cx18/cx18-av-audio.c
@@ -0,0 +1,361 @@
1/*
2 * cx18 ADEC audio functions
3 *
4 * Derived from cx25840-audio.c
5 *
6 * Copyright (C) 2007 Hans Verkuil <hverkuil@xs4all.nl>
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * as published by the Free Software Foundation; either version 2
11 * of the License, or (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
21 * 02110-1301, USA.
22 */
23
24#include "cx18-driver.h"
25
26static int set_audclk_freq(struct cx18 *cx, u32 freq)
27{
28 struct cx18_av_state *state = &cx->av_state;
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 cx18_av_write(cx, 0x127, 0x50);
36
37 if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
38 switch (freq) {
39 case 32000:
40 /* VID_PLL and AUX_PLL */
41 cx18_av_write4(cx, 0x108, 0x1006040f);
42
43 /* AUX_PLL_FRAC */
44 cx18_av_write4(cx, 0x110, 0x01bb39ee);
45
46 /* src3/4/6_ctl = 0x0801f77f */
47 cx18_av_write4(cx, 0x900, 0x0801f77f);
48 cx18_av_write4(cx, 0x904, 0x0801f77f);
49 cx18_av_write4(cx, 0x90c, 0x0801f77f);
50 break;
51
52 case 44100:
53 /* VID_PLL and AUX_PLL */
54 cx18_av_write4(cx, 0x108, 0x1009040f);
55
56 /* AUX_PLL_FRAC */
57 cx18_av_write4(cx, 0x110, 0x00ec6bd6);
58
59 /* src3/4/6_ctl = 0x08016d59 */
60 cx18_av_write4(cx, 0x900, 0x08016d59);
61 cx18_av_write4(cx, 0x904, 0x08016d59);
62 cx18_av_write4(cx, 0x90c, 0x08016d59);
63 break;
64
65 case 48000:
66 /* VID_PLL and AUX_PLL */
67 cx18_av_write4(cx, 0x108, 0x100a040f);
68
69 /* AUX_PLL_FRAC */
70 cx18_av_write4(cx, 0x110, 0x0098d6e5);
71
72 /* src3/4/6_ctl = 0x08014faa */
73 cx18_av_write4(cx, 0x900, 0x08014faa);
74 cx18_av_write4(cx, 0x904, 0x08014faa);
75 cx18_av_write4(cx, 0x90c, 0x08014faa);
76 break;
77 }
78 } else {
79 switch (freq) {
80 case 32000:
81 /* VID_PLL and AUX_PLL */
82 cx18_av_write4(cx, 0x108, 0x1e08040f);
83
84 /* AUX_PLL_FRAC */
85 cx18_av_write4(cx, 0x110, 0x012a0869);
86
87 /* src1_ctl = 0x08010000 */
88 cx18_av_write4(cx, 0x8f8, 0x08010000);
89
90 /* src3/4/6_ctl = 0x08020000 */
91 cx18_av_write4(cx, 0x900, 0x08020000);
92 cx18_av_write4(cx, 0x904, 0x08020000);
93 cx18_av_write4(cx, 0x90c, 0x08020000);
94
95 /* SA_MCLK_SEL=1, SA_MCLK_DIV=0x14 */
96 cx18_av_write(cx, 0x127, 0x54);
97 break;
98
99 case 44100:
100 /* VID_PLL and AUX_PLL */
101 cx18_av_write4(cx, 0x108, 0x1809040f);
102
103 /* AUX_PLL_FRAC */
104 cx18_av_write4(cx, 0x110, 0x00ec6bd6);
105
106 /* src1_ctl = 0x08010000 */
107 cx18_av_write4(cx, 0x8f8, 0x080160cd);
108
109 /* src3/4/6_ctl = 0x08020000 */
110 cx18_av_write4(cx, 0x900, 0x08017385);
111 cx18_av_write4(cx, 0x904, 0x08017385);
112 cx18_av_write4(cx, 0x90c, 0x08017385);
113 break;
114
115 case 48000:
116 /* VID_PLL and AUX_PLL */
117 cx18_av_write4(cx, 0x108, 0x180a040f);
118
119 /* AUX_PLL_FRAC */
120 cx18_av_write4(cx, 0x110, 0x0098d6e5);
121
122 /* src1_ctl = 0x08010000 */
123 cx18_av_write4(cx, 0x8f8, 0x08018000);
124
125 /* src3/4/6_ctl = 0x08020000 */
126 cx18_av_write4(cx, 0x900, 0x08015555);
127 cx18_av_write4(cx, 0x904, 0x08015555);
128 cx18_av_write4(cx, 0x90c, 0x08015555);
129 break;
130 }
131 }
132
133 state->audclk_freq = freq;
134
135 return 0;
136}
137
138void cx18_av_audio_set_path(struct cx18 *cx)
139{
140 struct cx18_av_state *state = &cx->av_state;
141
142 /* stop microcontroller */
143 cx18_av_and_or(cx, 0x803, ~0x10, 0);
144
145 /* assert soft reset */
146 cx18_av_and_or(cx, 0x810, ~0x1, 0x01);
147
148 /* Mute everything to prevent the PFFT! */
149 cx18_av_write(cx, 0x8d3, 0x1f);
150
151 if (state->aud_input == CX18_AV_AUDIO_SERIAL) {
152 /* Set Path1 to Serial Audio Input */
153 cx18_av_write4(cx, 0x8d0, 0x01011012);
154
155 /* The microcontroller should not be started for the
156 * non-tuner inputs: autodetection is specific for
157 * TV audio. */
158 } else {
159 /* Set Path1 to Analog Demod Main Channel */
160 cx18_av_write4(cx, 0x8d0, 0x1f063870);
161 }
162
163 set_audclk_freq(cx, state->audclk_freq);
164
165 /* deassert soft reset */
166 cx18_av_and_or(cx, 0x810, ~0x1, 0x00);
167
168 if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
169 /* When the microcontroller detects the
170 * audio format, it will unmute the lines */
171 cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
172 }
173}
174
175static int get_volume(struct cx18 *cx)
176{
177 /* Volume runs +18dB to -96dB in 1/2dB steps
178 * change to fit the msp3400 -114dB to +12dB range */
179
180 /* check PATH1_VOLUME */
181 int vol = 228 - cx18_av_read(cx, 0x8d4);
182 vol = (vol / 2) + 23;
183 return vol << 9;
184}
185
186static void set_volume(struct cx18 *cx, int volume)
187{
188 /* First convert the volume to msp3400 values (0-127) */
189 int vol = volume >> 9;
190 /* now scale it up to cx18_av values
191 * -114dB to -96dB maps to 0
192 * this should be 19, but in my testing that was 4dB too loud */
193 if (vol <= 23)
194 vol = 0;
195 else
196 vol -= 23;
197
198 /* PATH1_VOLUME */
199 cx18_av_write(cx, 0x8d4, 228 - (vol * 2));
200}
201
202static int get_bass(struct cx18 *cx)
203{
204 /* bass is 49 steps +12dB to -12dB */
205
206 /* check PATH1_EQ_BASS_VOL */
207 int bass = cx18_av_read(cx, 0x8d9) & 0x3f;
208 bass = (((48 - bass) * 0xffff) + 47) / 48;
209 return bass;
210}
211
212static void set_bass(struct cx18 *cx, int bass)
213{
214 /* PATH1_EQ_BASS_VOL */
215 cx18_av_and_or(cx, 0x8d9, ~0x3f, 48 - (bass * 48 / 0xffff));
216}
217
218static int get_treble(struct cx18 *cx)
219{
220 /* treble is 49 steps +12dB to -12dB */
221
222 /* check PATH1_EQ_TREBLE_VOL */
223 int treble = cx18_av_read(cx, 0x8db) & 0x3f;
224 treble = (((48 - treble) * 0xffff) + 47) / 48;
225 return treble;
226}
227
228static void set_treble(struct cx18 *cx, int treble)
229{
230 /* PATH1_EQ_TREBLE_VOL */
231 cx18_av_and_or(cx, 0x8db, ~0x3f, 48 - (treble * 48 / 0xffff));
232}
233
234static int get_balance(struct cx18 *cx)
235{
236 /* balance is 7 bit, 0 to -96dB */
237
238 /* check PATH1_BAL_LEVEL */
239 int balance = cx18_av_read(cx, 0x8d5) & 0x7f;
240 /* check PATH1_BAL_LEFT */
241 if ((cx18_av_read(cx, 0x8d5) & 0x80) == 0)
242 balance = 0x80 - balance;
243 else
244 balance = 0x80 + balance;
245 return balance << 8;
246}
247
248static void set_balance(struct cx18 *cx, int balance)
249{
250 int bal = balance >> 8;
251 if (bal > 0x80) {
252 /* PATH1_BAL_LEFT */
253 cx18_av_and_or(cx, 0x8d5, 0x7f, 0x80);
254 /* PATH1_BAL_LEVEL */
255 cx18_av_and_or(cx, 0x8d5, ~0x7f, bal & 0x7f);
256 } else {
257 /* PATH1_BAL_LEFT */
258 cx18_av_and_or(cx, 0x8d5, 0x7f, 0x00);
259 /* PATH1_BAL_LEVEL */
260 cx18_av_and_or(cx, 0x8d5, ~0x7f, 0x80 - bal);
261 }
262}
263
264static int get_mute(struct cx18 *cx)
265{
266 /* check SRC1_MUTE_EN */
267 return cx18_av_read(cx, 0x8d3) & 0x2 ? 1 : 0;
268}
269
270static void set_mute(struct cx18 *cx, int mute)
271{
272 struct cx18_av_state *state = &cx->av_state;
273
274 if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
275 /* Must turn off microcontroller in order to mute sound.
276 * Not sure if this is the best method, but it does work.
277 * If the microcontroller is running, then it will undo any
278 * changes to the mute register. */
279 if (mute) {
280 /* disable microcontroller */
281 cx18_av_and_or(cx, 0x803, ~0x10, 0x00);
282 cx18_av_write(cx, 0x8d3, 0x1f);
283 } else {
284 /* enable microcontroller */
285 cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
286 }
287 } else {
288 /* SRC1_MUTE_EN */
289 cx18_av_and_or(cx, 0x8d3, ~0x2, mute ? 0x02 : 0x00);
290 }
291}
292
293int cx18_av_audio(struct cx18 *cx, unsigned int cmd, void *arg)
294{
295 struct cx18_av_state *state = &cx->av_state;
296 struct v4l2_control *ctrl = arg;
297 int retval;
298
299 switch (cmd) {
300 case VIDIOC_INT_AUDIO_CLOCK_FREQ:
301 if (state->aud_input != CX18_AV_AUDIO_SERIAL) {
302 cx18_av_and_or(cx, 0x803, ~0x10, 0);
303 cx18_av_write(cx, 0x8d3, 0x1f);
304 }
305 cx18_av_and_or(cx, 0x810, ~0x1, 1);
306 retval = set_audclk_freq(cx, *(u32 *)arg);
307 cx18_av_and_or(cx, 0x810, ~0x1, 0);
308 if (state->aud_input != CX18_AV_AUDIO_SERIAL)
309 cx18_av_and_or(cx, 0x803, ~0x10, 0x10);
310 return retval;
311
312 case VIDIOC_G_CTRL:
313 switch (ctrl->id) {
314 case V4L2_CID_AUDIO_VOLUME:
315 ctrl->value = get_volume(cx);
316 break;
317 case V4L2_CID_AUDIO_BASS:
318 ctrl->value = get_bass(cx);
319 break;
320 case V4L2_CID_AUDIO_TREBLE:
321 ctrl->value = get_treble(cx);
322 break;
323 case V4L2_CID_AUDIO_BALANCE:
324 ctrl->value = get_balance(cx);
325 break;
326 case V4L2_CID_AUDIO_MUTE:
327 ctrl->value = get_mute(cx);
328 break;
329 default:
330 return -EINVAL;
331 }
332 break;
333
334 case VIDIOC_S_CTRL:
335 switch (ctrl->id) {
336 case V4L2_CID_AUDIO_VOLUME:
337 set_volume(cx, ctrl->value);
338 break;
339 case V4L2_CID_AUDIO_BASS:
340 set_bass(cx, ctrl->value);
341 break;
342 case V4L2_CID_AUDIO_TREBLE:
343 set_treble(cx, ctrl->value);
344 break;
345 case V4L2_CID_AUDIO_BALANCE:
346 set_balance(cx, ctrl->value);
347 break;
348 case V4L2_CID_AUDIO_MUTE:
349 set_mute(cx, ctrl->value);
350 break;
351 default:
352 return -EINVAL;
353 }
354 break;
355
356 default:
357 return -EINVAL;
358 }
359
360 return 0;
361}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-29 09:36:43 -0500