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 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 */
24
25 #include <linux/kernel.h>
26 #include <linux/mempool.h>
27 #include <linux/poll.h>
28 #include <linux/kthread.h>
29 #include <linux/freezer.h>
30 #include <linux/module.h>
31 #include <linux/slab.h>
32
33 #include <sound/core.h>
34 #include <sound/initval.h>
35 #include <sound/pcm.h>
36 #include <sound/control.h>
37
38 #include "solo6x10.h"
39 #include "solo6x10-tw28.h"
40
41 #define G723_FDMA_PAGES 32
42 #define G723_PERIOD_BYTES 48
43 #define G723_PERIOD_BLOCK 1024
44 #define G723_FRAMES_PER_PAGE 48
45
46 /* Sets up channels 16-19 for decoding and 0-15 for encoding */
47 #define OUTMODE_MASK 0x300
48
49 #define SAMPLERATE 8000
50 #define BITRATE 25
51
52 /* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
53 * is broken down to 20 * 48 byte regions (one for each channel possible)
54 * with the rest of the page being dummy data. */
55 #define G723_MAX_BUFFER (G723_PERIOD_BYTES * PERIODS_MAX)
56 #define G723_INTR_ORDER 4 /* 0 - 4 */
57 #define PERIODS_MIN (1 << G723_INTR_ORDER)
58 #define PERIODS_MAX G723_FDMA_PAGES
59
60 struct solo_snd_pcm {
61 int on;
62 spinlock_t lock;
63 struct solo_dev *solo_dev;
64 unsigned char *g723_buf;
65 dma_addr_t g723_dma;
66 };
67
solo_g723_config(struct solo_dev * solo_dev)68 static void solo_g723_config(struct solo_dev *solo_dev)
69 {
70 int clk_div;
71
72 clk_div = (solo_dev->clock_mhz * 1000000)
73 / (SAMPLERATE * (BITRATE * 2) * 2);
74
75 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
76 SOLO_AUDIO_BITRATE(BITRATE)
77 | SOLO_AUDIO_CLK_DIV(clk_div));
78
79 solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
80 SOLO_AUDIO_FDMA_INTERVAL(1)
81 | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
82 | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
83
84 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
85 SOLO_AUDIO_ENABLE
86 | SOLO_AUDIO_I2S_MODE
87 | SOLO_AUDIO_I2S_MULTI(3)
88 | SOLO_AUDIO_MODE(OUTMODE_MASK));
89 }
90
solo_g723_isr(struct solo_dev * solo_dev)91 void solo_g723_isr(struct solo_dev *solo_dev)
92 {
93 struct snd_pcm_str *pstr =
94 &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
95 struct snd_pcm_substream *ss;
96 struct solo_snd_pcm *solo_pcm;
97
98 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
99 if (snd_pcm_substream_chip(ss) == NULL)
100 continue;
101
102 /* This means open() hasn't been called on this one */
103 if (snd_pcm_substream_chip(ss) == solo_dev)
104 continue;
105
106 /* Haven't triggered a start yet */
107 solo_pcm = snd_pcm_substream_chip(ss);
108 if (!solo_pcm->on)
109 continue;
110
111 snd_pcm_period_elapsed(ss);
112 }
113 }
114
snd_solo_hw_params(struct snd_pcm_substream * ss,struct snd_pcm_hw_params * hw_params)115 static int snd_solo_hw_params(struct snd_pcm_substream *ss,
116 struct snd_pcm_hw_params *hw_params)
117 {
118 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
119 }
120
snd_solo_hw_free(struct snd_pcm_substream * ss)121 static int snd_solo_hw_free(struct snd_pcm_substream *ss)
122 {
123 return snd_pcm_lib_free_pages(ss);
124 }
125
126 static const struct snd_pcm_hardware snd_solo_pcm_hw = {
127 .info = (SNDRV_PCM_INFO_MMAP |
128 SNDRV_PCM_INFO_INTERLEAVED |
129 SNDRV_PCM_INFO_BLOCK_TRANSFER |
130 SNDRV_PCM_INFO_MMAP_VALID),
131 .formats = SNDRV_PCM_FMTBIT_U8,
132 .rates = SNDRV_PCM_RATE_8000,
133 .rate_min = SAMPLERATE,
134 .rate_max = SAMPLERATE,
135 .channels_min = 1,
136 .channels_max = 1,
137 .buffer_bytes_max = G723_MAX_BUFFER,
138 .period_bytes_min = G723_PERIOD_BYTES,
139 .period_bytes_max = G723_PERIOD_BYTES,
140 .periods_min = PERIODS_MIN,
141 .periods_max = PERIODS_MAX,
142 };
143
snd_solo_pcm_open(struct snd_pcm_substream * ss)144 static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
145 {
146 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
147 struct solo_snd_pcm *solo_pcm;
148
149 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
150 if (solo_pcm == NULL)
151 goto oom;
152
153 solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
154 G723_PERIOD_BYTES,
155 &solo_pcm->g723_dma);
156 if (solo_pcm->g723_buf == NULL)
157 goto oom;
158
159 spin_lock_init(&solo_pcm->lock);
160 solo_pcm->solo_dev = solo_dev;
161 ss->runtime->hw = snd_solo_pcm_hw;
162
163 snd_pcm_substream_chip(ss) = solo_pcm;
164
165 return 0;
166
167 oom:
168 kfree(solo_pcm);
169 return -ENOMEM;
170 }
171
snd_solo_pcm_close(struct snd_pcm_substream * ss)172 static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
173 {
174 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
175
176 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
177 pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
178 solo_pcm->g723_buf, solo_pcm->g723_dma);
179 kfree(solo_pcm);
180
181 return 0;
182 }
183
snd_solo_pcm_trigger(struct snd_pcm_substream * ss,int cmd)184 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
185 {
186 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
187 struct solo_dev *solo_dev = solo_pcm->solo_dev;
188 int ret = 0;
189
190 spin_lock(&solo_pcm->lock);
191
192 switch (cmd) {
193 case SNDRV_PCM_TRIGGER_START:
194 if (solo_pcm->on == 0) {
195 /* If this is the first user, switch on interrupts */
196 if (atomic_inc_return(&solo_dev->snd_users) == 1)
197 solo_irq_on(solo_dev, SOLO_IRQ_G723);
198 solo_pcm->on = 1;
199 }
200 break;
201 case SNDRV_PCM_TRIGGER_STOP:
202 if (solo_pcm->on) {
203 /* If this was our last user, switch them off */
204 if (atomic_dec_return(&solo_dev->snd_users) == 0)
205 solo_irq_off(solo_dev, SOLO_IRQ_G723);
206 solo_pcm->on = 0;
207 }
208 break;
209 default:
210 ret = -EINVAL;
211 }
212
213 spin_unlock(&solo_pcm->lock);
214
215 return ret;
216 }
217
snd_solo_pcm_prepare(struct snd_pcm_substream * ss)218 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
219 {
220 return 0;
221 }
222
snd_solo_pcm_pointer(struct snd_pcm_substream * ss)223 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
224 {
225 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
226 struct solo_dev *solo_dev = solo_pcm->solo_dev;
227 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
228
229 return idx * G723_FRAMES_PER_PAGE;
230 }
231
snd_solo_pcm_copy(struct snd_pcm_substream * ss,int channel,snd_pcm_uframes_t pos,void __user * dst,snd_pcm_uframes_t count)232 static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,
233 snd_pcm_uframes_t pos, void __user *dst,
234 snd_pcm_uframes_t count)
235 {
236 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
237 struct solo_dev *solo_dev = solo_pcm->solo_dev;
238 int err, i;
239
240 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
241 int page = (pos / G723_FRAMES_PER_PAGE) + i;
242
243 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
244 SOLO_G723_EXT_ADDR(solo_dev) +
245 (page * G723_PERIOD_BLOCK) +
246 (ss->number * G723_PERIOD_BYTES),
247 G723_PERIOD_BYTES, 0, 0);
248 if (err)
249 return err;
250
251 err = copy_to_user(dst + (i * G723_PERIOD_BYTES),
252 solo_pcm->g723_buf, G723_PERIOD_BYTES);
253
254 if (err)
255 return -EFAULT;
256 }
257
258 return 0;
259 }
260
261 static struct snd_pcm_ops snd_solo_pcm_ops = {
262 .open = snd_solo_pcm_open,
263 .close = snd_solo_pcm_close,
264 .ioctl = snd_pcm_lib_ioctl,
265 .hw_params = snd_solo_hw_params,
266 .hw_free = snd_solo_hw_free,
267 .prepare = snd_solo_pcm_prepare,
268 .trigger = snd_solo_pcm_trigger,
269 .pointer = snd_solo_pcm_pointer,
270 .copy = snd_solo_pcm_copy,
271 };
272
snd_solo_capture_volume_info(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_info * info)273 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
274 struct snd_ctl_elem_info *info)
275 {
276 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
277 info->count = 1;
278 info->value.integer.min = 0;
279 info->value.integer.max = 15;
280 info->value.integer.step = 1;
281
282 return 0;
283 }
284
snd_solo_capture_volume_get(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)285 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
286 struct snd_ctl_elem_value *value)
287 {
288 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
289 u8 ch = value->id.numid - 1;
290
291 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
292
293 return 0;
294 }
295
snd_solo_capture_volume_put(struct snd_kcontrol * kcontrol,struct snd_ctl_elem_value * value)296 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
297 struct snd_ctl_elem_value *value)
298 {
299 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
300 u8 ch = value->id.numid - 1;
301 u8 old_val;
302
303 old_val = tw28_get_audio_gain(solo_dev, ch);
304 if (old_val == value->value.integer.value[0])
305 return 0;
306
307 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
308
309 return 1;
310 }
311
312 static struct snd_kcontrol_new snd_solo_capture_volume = {
313 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
314 .name = "Capture Volume",
315 .info = snd_solo_capture_volume_info,
316 .get = snd_solo_capture_volume_get,
317 .put = snd_solo_capture_volume_put,
318 };
319
solo_snd_pcm_init(struct solo_dev * solo_dev)320 static int solo_snd_pcm_init(struct solo_dev *solo_dev)
321 {
322 struct snd_card *card = solo_dev->snd_card;
323 struct snd_pcm *pcm;
324 struct snd_pcm_substream *ss;
325 int ret;
326 int i;
327
328 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
329 &pcm);
330 if (ret < 0)
331 return ret;
332
333 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
334 &snd_solo_pcm_ops);
335
336 snd_pcm_chip(pcm) = solo_dev;
337 pcm->info_flags = 0;
338 strcpy(pcm->name, card->shortname);
339
340 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
341 ss; ss = ss->next, i++)
342 sprintf(ss->name, "Camera #%d Audio", i);
343
344 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
345 SNDRV_DMA_TYPE_CONTINUOUS,
346 snd_dma_continuous_data(GFP_KERNEL),
347 G723_MAX_BUFFER, G723_MAX_BUFFER);
348 if (ret < 0)
349 return ret;
350
351 solo_dev->snd_pcm = pcm;
352
353 return 0;
354 }
355
solo_g723_init(struct solo_dev * solo_dev)356 int solo_g723_init(struct solo_dev *solo_dev)
357 {
358 static struct snd_device_ops ops = { NULL };
359 struct snd_card *card;
360 struct snd_kcontrol_new kctl;
361 char name[32];
362 int ret;
363
364 atomic_set(&solo_dev->snd_users, 0);
365
366 /* Allows for easier mapping between video and audio */
367 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
368
369 ret = snd_card_create(SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
370 &solo_dev->snd_card);
371 if (ret < 0)
372 return ret;
373
374 card = solo_dev->snd_card;
375
376 strcpy(card->driver, SOLO6X10_NAME);
377 strcpy(card->shortname, "SOLO-6x10 Audio");
378 sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
379 pci_name(solo_dev->pdev), solo_dev->pdev->irq);
380 snd_card_set_dev(card, &solo_dev->pdev->dev);
381
382 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
383 if (ret < 0)
384 goto snd_error;
385
386 /* Mixer controls */
387 strcpy(card->mixername, "SOLO-6x10");
388 kctl = snd_solo_capture_volume;
389 kctl.count = solo_dev->nr_chans;
390
391 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
392 if (ret < 0)
393 return ret;
394
395 ret = solo_snd_pcm_init(solo_dev);
396 if (ret < 0)
397 goto snd_error;
398
399 ret = snd_card_register(card);
400 if (ret < 0)
401 goto snd_error;
402
403 solo_g723_config(solo_dev);
404
405 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
406
407 return 0;
408
409 snd_error:
410 snd_card_free(card);
411 return ret;
412 }
413
solo_g723_exit(struct solo_dev * solo_dev)414 void solo_g723_exit(struct solo_dev *solo_dev)
415 {
416 if (!solo_dev->snd_card)
417 return;
418
419 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
420 solo_irq_off(solo_dev, SOLO_IRQ_G723);
421
422 snd_card_free(solo_dev->snd_card);
423 solo_dev->snd_card = NULL;
424 }
425