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.
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.
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>
33 #include <sound/core.h>
34 #include <sound/initval.h>
35 #include <sound/pcm.h>
36 #include <sound/control.h>
39 #include "solo6x10-tw28.h"
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
46 /* Sets up channels 16-19 for decoding and 0-15 for encoding */
47 #define OUTMODE_MASK 0x300
49 #define SAMPLERATE 8000
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
63 struct solo_dev *solo_dev;
64 unsigned char *g723_buf;
68 static void solo_g723_config(struct solo_dev *solo_dev)
72 clk_div = (solo_dev->clock_mhz * 1000000)
73 / (SAMPLERATE * (BITRATE * 2) * 2);
75 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
76 SOLO_AUDIO_BITRATE(BITRATE)
77 | SOLO_AUDIO_CLK_DIV(clk_div));
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));
84 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
87 | SOLO_AUDIO_I2S_MULTI(3)
88 | SOLO_AUDIO_MODE(OUTMODE_MASK));
91 void solo_g723_isr(struct solo_dev *solo_dev)
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;
98 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
99 if (snd_pcm_substream_chip(ss) == NULL)
102 /* This means open() hasn't been called on this one */
103 if (snd_pcm_substream_chip(ss) == solo_dev)
106 /* Haven't triggered a start yet */
107 solo_pcm = snd_pcm_substream_chip(ss);
111 snd_pcm_period_elapsed(ss);
115 static int snd_solo_hw_params(struct snd_pcm_substream *ss,
116 struct snd_pcm_hw_params *hw_params)
118 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params));
121 static int snd_solo_hw_free(struct snd_pcm_substream *ss)
123 return snd_pcm_lib_free_pages(ss);
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,
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,
144 static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
146 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
147 struct solo_snd_pcm *solo_pcm;
149 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
150 if (solo_pcm == NULL)
153 solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev,
155 &solo_pcm->g723_dma);
156 if (solo_pcm->g723_buf == NULL)
159 spin_lock_init(&solo_pcm->lock);
160 solo_pcm->solo_dev = solo_dev;
161 ss->runtime->hw = snd_solo_pcm_hw;
163 snd_pcm_substream_chip(ss) = solo_pcm;
172 static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
174 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
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);
184 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
186 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
187 struct solo_dev *solo_dev = solo_pcm->solo_dev;
190 spin_lock(&solo_pcm->lock);
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);
201 case SNDRV_PCM_TRIGGER_STOP:
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);
213 spin_unlock(&solo_pcm->lock);
218 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
223 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
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;
229 return idx * G723_FRAMES_PER_PAGE;
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)
236 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
237 struct solo_dev *solo_dev = solo_pcm->solo_dev;
240 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
241 int page = (pos / G723_FRAMES_PER_PAGE) + i;
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);
251 err = copy_to_user(dst + (i * G723_PERIOD_BYTES),
252 solo_pcm->g723_buf, G723_PERIOD_BYTES);
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,
273 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
274 struct snd_ctl_elem_info *info)
276 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
278 info->value.integer.min = 0;
279 info->value.integer.max = 15;
280 info->value.integer.step = 1;
285 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
286 struct snd_ctl_elem_value *value)
288 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
289 u8 ch = value->id.numid - 1;
291 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
296 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
297 struct snd_ctl_elem_value *value)
299 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
300 u8 ch = value->id.numid - 1;
303 old_val = tw28_get_audio_gain(solo_dev, ch);
304 if (old_val == value->value.integer.value[0])
307 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
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,
320 static int solo_snd_pcm_init(struct solo_dev *solo_dev)
322 struct snd_card *card = solo_dev->snd_card;
324 struct snd_pcm_substream *ss;
328 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
333 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
336 snd_pcm_chip(pcm) = solo_dev;
338 strcpy(pcm->name, card->shortname);
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);
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);
351 solo_dev->snd_pcm = pcm;
356 int solo_g723_init(struct solo_dev *solo_dev)
358 static struct snd_device_ops ops = { NULL };
359 struct snd_card *card;
360 struct snd_kcontrol_new kctl;
364 atomic_set(&solo_dev->snd_users, 0);
366 /* Allows for easier mapping between video and audio */
367 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
369 ret = snd_card_create(SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
370 &solo_dev->snd_card);
374 card = solo_dev->snd_card;
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);
382 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
387 strcpy(card->mixername, "SOLO-6x10");
388 kctl = snd_solo_capture_volume;
389 kctl.count = solo_dev->nr_chans;
391 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
395 ret = solo_snd_pcm_init(solo_dev);
399 ret = snd_card_register(card);
403 solo_g723_config(solo_dev);
405 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
414 void solo_g723_exit(struct solo_dev *solo_dev)
416 if (!solo_dev->snd_card)
419 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
420 solo_irq_off(solo_dev, SOLO_IRQ_G723);
422 snd_card_free(solo_dev->snd_card);
423 solo_dev->snd_card = NULL;