2 * Copyright (C) 2010-2013 Bluecherry, LLC <http://www.bluecherrydvr.com>
5 * Ben Collins <bcollins@ubuntu.com>
8 * John Brooks <john.brooks@bluecherry.net>
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.
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.
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>
29 #include <sound/core.h>
30 #include <sound/initval.h>
31 #include <sound/pcm.h>
32 #include <sound/control.h>
35 #include "solo6x10-tw28.h"
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
42 /* Sets up channels 16-19 for decoding and 0-15 for encoding */
43 #define OUTMODE_MASK 0x300
45 #define SAMPLERATE 8000
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 G723_MAX_BUFFER (G723_PERIOD_BYTES * PERIODS_MAX)
52 #define G723_INTR_ORDER 4 /* 0 - 4 */
53 #define PERIODS_MIN (1 << G723_INTR_ORDER)
54 #define PERIODS_MAX G723_FDMA_PAGES
59 struct solo_dev *solo_dev;
64 static void solo_g723_config(struct solo_dev *solo_dev)
68 clk_div = (solo_dev->clock_mhz * 1000000)
69 / (SAMPLERATE * (BITRATE * 2) * 2);
71 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
72 SOLO_AUDIO_BITRATE(BITRATE)
73 | SOLO_AUDIO_CLK_DIV(clk_div));
75 solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
76 SOLO_AUDIO_FDMA_INTERVAL(1)
77 | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
78 | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
80 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
83 | SOLO_AUDIO_I2S_MULTI(3)
84 | SOLO_AUDIO_MODE(OUTMODE_MASK));
87 void solo_g723_isr(struct solo_dev *solo_dev)
89 struct snd_pcm_str *pstr =
90 &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
91 struct snd_pcm_substream *ss;
92 struct solo_snd_pcm *solo_pcm;
94 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
95 if (snd_pcm_substream_chip(ss) == NULL)
98 /* This means open() hasn't been called on this one */
99 if (snd_pcm_substream_chip(ss) == solo_dev)
102 /* Haven't triggered a start yet */
103 solo_pcm = snd_pcm_substream_chip(ss);
107 snd_pcm_period_elapsed(ss);
111 static int snd_solo_hw_params(struct snd_pcm_substream *ss,
112 struct snd_pcm_hw_params *hw_params)
114 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
117 static int snd_solo_hw_free(struct snd_pcm_substream *ss)
119 return snd_pcm_lib_free_pages(ss);
122 static const struct snd_pcm_hardware snd_solo_pcm_hw = {
123 .info = (SNDRV_PCM_INFO_MMAP |
124 SNDRV_PCM_INFO_INTERLEAVED |
125 SNDRV_PCM_INFO_BLOCK_TRANSFER |
126 SNDRV_PCM_INFO_MMAP_VALID),
127 .formats = SNDRV_PCM_FMTBIT_U8,
128 .rates = SNDRV_PCM_RATE_8000,
129 .rate_min = SAMPLERATE,
130 .rate_max = SAMPLERATE,
133 .buffer_bytes_max = G723_MAX_BUFFER,
134 .period_bytes_min = G723_PERIOD_BYTES,
135 .period_bytes_max = G723_PERIOD_BYTES,
136 .periods_min = PERIODS_MIN,
137 .periods_max = PERIODS_MAX,
140 static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
142 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
143 struct solo_snd_pcm *solo_pcm;
145 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
146 if (solo_pcm == NULL)
149 solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
151 &solo_pcm->g723_dma);
152 if (solo_pcm->g723_buf == NULL)
155 spin_lock_init(&solo_pcm->lock);
156 solo_pcm->solo_dev = solo_dev;
157 ss->runtime->hw = snd_solo_pcm_hw;
159 snd_pcm_substream_chip(ss) = solo_pcm;
168 static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
170 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
172 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
173 pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES,
174 solo_pcm->g723_buf, solo_pcm->g723_dma);
180 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
182 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
183 struct solo_dev *solo_dev = solo_pcm->solo_dev;
186 spin_lock(&solo_pcm->lock);
189 case SNDRV_PCM_TRIGGER_START:
190 if (solo_pcm->on == 0) {
191 /* If this is the first user, switch on interrupts */
192 if (atomic_inc_return(&solo_dev->snd_users) == 1)
193 solo_irq_on(solo_dev, SOLO_IRQ_G723);
197 case SNDRV_PCM_TRIGGER_STOP:
199 /* If this was our last user, switch them off */
200 if (atomic_dec_return(&solo_dev->snd_users) == 0)
201 solo_irq_off(solo_dev, SOLO_IRQ_G723);
209 spin_unlock(&solo_pcm->lock);
214 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
219 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
221 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
222 struct solo_dev *solo_dev = solo_pcm->solo_dev;
223 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
225 return idx * G723_FRAMES_PER_PAGE;
228 static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,
229 snd_pcm_uframes_t pos, void __user *dst,
230 snd_pcm_uframes_t count)
232 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
233 struct solo_dev *solo_dev = solo_pcm->solo_dev;
236 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
237 int page = (pos / G723_FRAMES_PER_PAGE) + i;
239 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
240 SOLO_G723_EXT_ADDR(solo_dev) +
241 (page * G723_PERIOD_BLOCK) +
242 (ss->number * G723_PERIOD_BYTES),
243 G723_PERIOD_BYTES, 0, 0);
247 err = copy_to_user(dst + (i * G723_PERIOD_BYTES),
248 solo_pcm->g723_buf, G723_PERIOD_BYTES);
257 static struct snd_pcm_ops snd_solo_pcm_ops = {
258 .open = snd_solo_pcm_open,
259 .close = snd_solo_pcm_close,
260 .ioctl = snd_pcm_lib_ioctl,
261 .hw_params = snd_solo_hw_params,
262 .hw_free = snd_solo_hw_free,
263 .prepare = snd_solo_pcm_prepare,
264 .trigger = snd_solo_pcm_trigger,
265 .pointer = snd_solo_pcm_pointer,
266 .copy = snd_solo_pcm_copy,
269 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
270 struct snd_ctl_elem_info *info)
272 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
274 info->value.integer.min = 0;
275 info->value.integer.max = 15;
276 info->value.integer.step = 1;
281 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
282 struct snd_ctl_elem_value *value)
284 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
285 u8 ch = value->id.numid - 1;
287 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
292 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
293 struct snd_ctl_elem_value *value)
295 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
296 u8 ch = value->id.numid - 1;
299 old_val = tw28_get_audio_gain(solo_dev, ch);
300 if (old_val == value->value.integer.value[0])
303 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
308 static struct snd_kcontrol_new snd_solo_capture_volume = {
309 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
310 .name = "Capture Volume",
311 .info = snd_solo_capture_volume_info,
312 .get = snd_solo_capture_volume_get,
313 .put = snd_solo_capture_volume_put,
316 static int solo_snd_pcm_init(struct solo_dev *solo_dev)
318 struct snd_card *card = solo_dev->snd_card;
320 struct snd_pcm_substream *ss;
324 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
329 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
332 snd_pcm_chip(pcm) = solo_dev;
334 strcpy(pcm->name, card->shortname);
336 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
337 ss; ss = ss->next, i++)
338 sprintf(ss->name, "Camera #%d Audio", i);
340 ret = snd_pcm_lib_preallocate_pages_for_all(pcm,
341 SNDRV_DMA_TYPE_CONTINUOUS,
342 snd_dma_continuous_data(GFP_KERNEL),
343 G723_MAX_BUFFER, G723_MAX_BUFFER);
347 solo_dev->snd_pcm = pcm;
352 int solo_g723_init(struct solo_dev *solo_dev)
354 static struct snd_device_ops ops = { NULL };
355 struct snd_card *card;
356 struct snd_kcontrol_new kctl;
360 atomic_set(&solo_dev->snd_users, 0);
362 /* Allows for easier mapping between video and audio */
363 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
365 ret = snd_card_new(&solo_dev->pdev->dev,
366 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
367 &solo_dev->snd_card);
371 card = solo_dev->snd_card;
373 strcpy(card->driver, SOLO6X10_NAME);
374 strcpy(card->shortname, "SOLO-6x10 Audio");
375 sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
376 pci_name(solo_dev->pdev), solo_dev->pdev->irq);
378 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
383 strcpy(card->mixername, "SOLO-6x10");
384 kctl = snd_solo_capture_volume;
385 kctl.count = solo_dev->nr_chans;
387 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
391 ret = solo_snd_pcm_init(solo_dev);
395 ret = snd_card_register(card);
399 solo_g723_config(solo_dev);
401 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
410 void solo_g723_exit(struct solo_dev *solo_dev)
412 if (!solo_dev->snd_card)
415 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
416 solo_irq_off(solo_dev, SOLO_IRQ_G723);
418 snd_card_free(solo_dev->snd_card);
419 solo_dev->snd_card = NULL;