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UBUNTU: Ubuntu-4.13.0-45.50
[mirror_ubuntu-artful-kernel.git] / drivers / media / pci / solo6x10 / solo6x10-g723.c
1 /*
2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
3 *
4 * Original author:
5 * Ben Collins <bcollins@ubuntu.com>
6 *
7 * Additional work by:
8 * John Brooks <john.brooks@bluecherry.net>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 */
20
21 #include <linux/kernel.h>
22 #include <linux/mempool.h>
23 #include <linux/poll.h>
24 #include <linux/kthread.h>
25 #include <linux/freezer.h>
26 #include <linux/module.h>
27 #include <linux/slab.h>
28
29 #include <sound/core.h>
30 #include <sound/initval.h>
31 #include <sound/pcm.h>
32 #include <sound/control.h>
33
34 #include "solo6x10.h"
35 #include "solo6x10-tw28.h"
36
37 #define G723_FDMA_PAGES 32
38 #define G723_PERIOD_BYTES 48
39 #define G723_PERIOD_BLOCK 1024
40 #define G723_FRAMES_PER_PAGE 48
41
42 /* Sets up channels 16-19 for decoding and 0-15 for encoding */
43 #define OUTMODE_MASK 0x300
44
45 #define SAMPLERATE 8000
46 #define BITRATE 25
47
48 /* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
49 * is broken down to 20 * 48 byte regions (one for each channel possible)
50 * with the rest of the page being dummy data. */
51 #define PERIODS G723_FDMA_PAGES
52 #define G723_INTR_ORDER 4 /* 0 - 4 */
53
54 struct solo_snd_pcm {
55 int on;
56 spinlock_t lock;
57 struct solo_dev *solo_dev;
58 u8 *g723_buf;
59 dma_addr_t g723_dma;
60 };
61
62 static void solo_g723_config(struct solo_dev *solo_dev)
63 {
64 int clk_div;
65
66 clk_div = (solo_dev->clock_mhz * 1000000)
67 / (SAMPLERATE * (BITRATE * 2) * 2);
68
69 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
70 SOLO_AUDIO_BITRATE(BITRATE)
71 | SOLO_AUDIO_CLK_DIV(clk_div));
72
73 solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
74 SOLO_AUDIO_FDMA_INTERVAL(1)
75 | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
76 | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
77
78 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
79 SOLO_AUDIO_ENABLE
80 | SOLO_AUDIO_I2S_MODE
81 | SOLO_AUDIO_I2S_MULTI(3)
82 | SOLO_AUDIO_MODE(OUTMODE_MASK));
83 }
84
85 void solo_g723_isr(struct solo_dev *solo_dev)
86 {
87 struct snd_pcm_str *pstr =
88 &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
89 struct snd_pcm_substream *ss;
90 struct solo_snd_pcm *solo_pcm;
91
92 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
93 if (snd_pcm_substream_chip(ss) == NULL)
94 continue;
95
96 /* This means open() hasn't been called on this one */
97 if (snd_pcm_substream_chip(ss) == solo_dev)
98 continue;
99
100 /* Haven't triggered a start yet */
101 solo_pcm = snd_pcm_substream_chip(ss);
102 if (!solo_pcm->on)
103 continue;
104
105 snd_pcm_period_elapsed(ss);
106 }
107 }
108
109 static int snd_solo_hw_params(struct snd_pcm_substream *ss,
110 struct snd_pcm_hw_params *hw_params)
111 {
112 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
113 }
114
115 static int snd_solo_hw_free(struct snd_pcm_substream *ss)
116 {
117 return snd_pcm_lib_free_pages(ss);
118 }
119
120 static const struct snd_pcm_hardware snd_solo_pcm_hw = {
121 .info = (SNDRV_PCM_INFO_MMAP |
122 SNDRV_PCM_INFO_INTERLEAVED |
123 SNDRV_PCM_INFO_BLOCK_TRANSFER |
124 SNDRV_PCM_INFO_MMAP_VALID),
125 .formats = SNDRV_PCM_FMTBIT_U8,
126 .rates = SNDRV_PCM_RATE_8000,
127 .rate_min = SAMPLERATE,
128 .rate_max = SAMPLERATE,
129 .channels_min = 1,
130 .channels_max = 1,
131 .buffer_bytes_max = G723_PERIOD_BYTES * PERIODS,
132 .period_bytes_min = G723_PERIOD_BYTES,
133 .period_bytes_max = G723_PERIOD_BYTES,
134 .periods_min = PERIODS,
135 .periods_max = PERIODS,
136 };
137
138 static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
139 {
140 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
141 struct solo_snd_pcm *solo_pcm;
142
143 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
144 if (solo_pcm == NULL)
145 goto oom;
146
147 solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
148 G723_PERIOD_BYTES,
149 &solo_pcm->g723_dma);
150 if (solo_pcm->g723_buf == NULL)
151 goto oom;
152
153 spin_lock_init(&solo_pcm->lock);
154 solo_pcm->solo_dev = solo_dev;
155 ss->runtime->hw = snd_solo_pcm_hw;
156
157 snd_pcm_substream_chip(ss) = solo_pcm;
158
159 return 0;
160
161 oom:
162 kfree(solo_pcm);
163 return -ENOMEM;
164 }
165
166 static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
167 {
168 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
169
170 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
171 pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
172 solo_pcm->g723_buf, solo_pcm->g723_dma);
173 kfree(solo_pcm);
174
175 return 0;
176 }
177
178 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
179 {
180 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
181 struct solo_dev *solo_dev = solo_pcm->solo_dev;
182 int ret = 0;
183
184 spin_lock(&solo_pcm->lock);
185
186 switch (cmd) {
187 case SNDRV_PCM_TRIGGER_START:
188 if (solo_pcm->on == 0) {
189 /* If this is the first user, switch on interrupts */
190 if (atomic_inc_return(&solo_dev->snd_users) == 1)
191 solo_irq_on(solo_dev, SOLO_IRQ_G723);
192 solo_pcm->on = 1;
193 }
194 break;
195 case SNDRV_PCM_TRIGGER_STOP:
196 if (solo_pcm->on) {
197 /* If this was our last user, switch them off */
198 if (atomic_dec_return(&solo_dev->snd_users) == 0)
199 solo_irq_off(solo_dev, SOLO_IRQ_G723);
200 solo_pcm->on = 0;
201 }
202 break;
203 default:
204 ret = -EINVAL;
205 }
206
207 spin_unlock(&solo_pcm->lock);
208
209 return ret;
210 }
211
212 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
213 {
214 return 0;
215 }
216
217 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
218 {
219 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
220 struct solo_dev *solo_dev = solo_pcm->solo_dev;
221 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
222
223 return idx * G723_FRAMES_PER_PAGE;
224 }
225
226 static int __snd_solo_pcm_copy(struct snd_pcm_substream *ss,
227 unsigned long pos, void *dst,
228 unsigned long count, bool in_kernel)
229 {
230 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
231 struct solo_dev *solo_dev = solo_pcm->solo_dev;
232 int err, i;
233
234 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
235 int page = (pos / G723_FRAMES_PER_PAGE) + i;
236
237 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
238 SOLO_G723_EXT_ADDR(solo_dev) +
239 (page * G723_PERIOD_BLOCK) +
240 (ss->number * G723_PERIOD_BYTES),
241 G723_PERIOD_BYTES, 0, 0);
242 if (err)
243 return err;
244
245 if (in_kernel)
246 memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES);
247 else if (copy_to_user((void __user *)dst,
248 solo_pcm->g723_buf, G723_PERIOD_BYTES))
249 return -EFAULT;
250 dst += G723_PERIOD_BYTES;
251 }
252
253 return 0;
254 }
255
256 static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel,
257 unsigned long pos, void __user *dst,
258 unsigned long count)
259 {
260 return __snd_solo_pcm_copy(ss, pos, (void *)dst, count, false);
261 }
262
263 static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel,
264 unsigned long pos, void *dst,
265 unsigned long count)
266 {
267 return __snd_solo_pcm_copy(ss, pos, dst, count, true);
268 }
269
270 static const struct snd_pcm_ops snd_solo_pcm_ops = {
271 .open = snd_solo_pcm_open,
272 .close = snd_solo_pcm_close,
273 .ioctl = snd_pcm_lib_ioctl,
274 .hw_params = snd_solo_hw_params,
275 .hw_free = snd_solo_hw_free,
276 .prepare = snd_solo_pcm_prepare,
277 .trigger = snd_solo_pcm_trigger,
278 .pointer = snd_solo_pcm_pointer,
279 .copy_user = snd_solo_pcm_copy_user,
280 .copy_kernel = snd_solo_pcm_copy_kernel,
281 };
282
283 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
284 struct snd_ctl_elem_info *info)
285 {
286 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
287 info->count = 1;
288 info->value.integer.min = 0;
289 info->value.integer.max = 15;
290 info->value.integer.step = 1;
291
292 return 0;
293 }
294
295 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
296 struct snd_ctl_elem_value *value)
297 {
298 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
299 u8 ch = value->id.numid - 1;
300
301 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
302
303 return 0;
304 }
305
306 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
307 struct snd_ctl_elem_value *value)
308 {
309 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
310 u8 ch = value->id.numid - 1;
311 u8 old_val;
312
313 old_val = tw28_get_audio_gain(solo_dev, ch);
314 if (old_val == value->value.integer.value[0])
315 return 0;
316
317 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
318
319 return 1;
320 }
321
322 static struct snd_kcontrol_new snd_solo_capture_volume = {
323 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
324 .name = "Capture Volume",
325 .info = snd_solo_capture_volume_info,
326 .get = snd_solo_capture_volume_get,
327 .put = snd_solo_capture_volume_put,
328 };
329
330 static int solo_snd_pcm_init(struct solo_dev *solo_dev)
331 {
332 struct snd_card *card = solo_dev->snd_card;
333 struct snd_pcm *pcm;
334 struct snd_pcm_substream *ss;
335 int ret;
336 int i;
337
338 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
339 &pcm);
340 if (ret < 0)
341 return ret;
342
343 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
344 &snd_solo_pcm_ops);
345
346 snd_pcm_chip(pcm) = solo_dev;
347 pcm->info_flags = 0;
348 strcpy(pcm->name, card->shortname);
349
350 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
351 ss; ss = ss->next, i++)
352 sprintf(ss->name, "Camera #%d Audio", i);
353
354 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
355 SNDRV_DMA_TYPE_CONTINUOUS,
356 snd_dma_continuous_data(GFP_KERNEL),
357 G723_PERIOD_BYTES * PERIODS,
358 G723_PERIOD_BYTES * PERIODS);
359 if (ret < 0)
360 return ret;
361
362 solo_dev->snd_pcm = pcm;
363
364 return 0;
365 }
366
367 int solo_g723_init(struct solo_dev *solo_dev)
368 {
369 static struct snd_device_ops ops = { };
370 struct snd_card *card;
371 struct snd_kcontrol_new kctl;
372 char name[32];
373 int ret;
374
375 atomic_set(&solo_dev->snd_users, 0);
376
377 /* Allows for easier mapping between video and audio */
378 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
379
380 ret = snd_card_new(&solo_dev->pdev->dev,
381 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
382 &solo_dev->snd_card);
383 if (ret < 0)
384 return ret;
385
386 card = solo_dev->snd_card;
387
388 strcpy(card->driver, SOLO6X10_NAME);
389 strcpy(card->shortname, "SOLO-6x10 Audio");
390 sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
391 pci_name(solo_dev->pdev), solo_dev->pdev->irq);
392
393 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
394 if (ret < 0)
395 goto snd_error;
396
397 /* Mixer controls */
398 strcpy(card->mixername, "SOLO-6x10");
399 kctl = snd_solo_capture_volume;
400 kctl.count = solo_dev->nr_chans;
401
402 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
403 if (ret < 0)
404 return ret;
405
406 ret = solo_snd_pcm_init(solo_dev);
407 if (ret < 0)
408 goto snd_error;
409
410 ret = snd_card_register(card);
411 if (ret < 0)
412 goto snd_error;
413
414 solo_g723_config(solo_dev);
415
416 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
417
418 return 0;
419
420 snd_error:
421 snd_card_free(card);
422 return ret;
423 }
424
425 void solo_g723_exit(struct solo_dev *solo_dev)
426 {
427 if (!solo_dev->snd_card)
428 return;
429
430 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
431 solo_irq_off(solo_dev, SOLO_IRQ_G723);
432
433 snd_card_free(solo_dev->snd_card);
434 solo_dev->snd_card = NULL;
435 }