1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com>
6 * Ben Collins <bcollins@ubuntu.com>
9 * John Brooks <john.brooks@bluecherry.net>
12 #include <linux/kernel.h>
13 #include <linux/mempool.h>
14 #include <linux/poll.h>
15 #include <linux/kthread.h>
16 #include <linux/freezer.h>
17 #include <linux/module.h>
18 #include <linux/slab.h>
20 #include <sound/core.h>
21 #include <sound/initval.h>
22 #include <sound/pcm.h>
23 #include <sound/control.h>
26 #include "solo6x10-tw28.h"
28 #define G723_FDMA_PAGES 32
29 #define G723_PERIOD_BYTES 48
30 #define G723_PERIOD_BLOCK 1024
31 #define G723_FRAMES_PER_PAGE 48
33 /* Sets up channels 16-19 for decoding and 0-15 for encoding */
34 #define OUTMODE_MASK 0x300
36 #define SAMPLERATE 8000
39 /* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page
40 * is broken down to 20 * 48 byte regions (one for each channel possible)
41 * with the rest of the page being dummy data. */
42 #define PERIODS G723_FDMA_PAGES
43 #define G723_INTR_ORDER 4 /* 0 - 4 */
48 struct solo_dev *solo_dev;
53 static void solo_g723_config(struct solo_dev *solo_dev)
57 clk_div = (solo_dev->clock_mhz * 1000000)
58 / (SAMPLERATE * (BITRATE * 2) * 2);
60 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,
61 SOLO_AUDIO_BITRATE(BITRATE)
62 | SOLO_AUDIO_CLK_DIV(clk_div));
64 solo_reg_write(solo_dev, SOLO_AUDIO_FDMA_INTR,
65 SOLO_AUDIO_FDMA_INTERVAL(1)
66 | SOLO_AUDIO_INTR_ORDER(G723_INTR_ORDER)
67 | SOLO_AUDIO_FDMA_BASE(SOLO_G723_EXT_ADDR(solo_dev) >> 16));
69 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,
72 | SOLO_AUDIO_I2S_MULTI(3)
73 | SOLO_AUDIO_MODE(OUTMODE_MASK));
76 void solo_g723_isr(struct solo_dev *solo_dev)
78 struct snd_pcm_str *pstr =
79 &solo_dev->snd_pcm->streams[SNDRV_PCM_STREAM_CAPTURE];
80 struct snd_pcm_substream *ss;
81 struct solo_snd_pcm *solo_pcm;
83 for (ss = pstr->substream; ss != NULL; ss = ss->next) {
84 if (snd_pcm_substream_chip(ss) == NULL)
87 /* This means open() hasn't been called on this one */
88 if (snd_pcm_substream_chip(ss) == solo_dev)
91 /* Haven't triggered a start yet */
92 solo_pcm = snd_pcm_substream_chip(ss);
96 snd_pcm_period_elapsed(ss);
100 static const struct snd_pcm_hardware snd_solo_pcm_hw = {
101 .info = (SNDRV_PCM_INFO_MMAP |
102 SNDRV_PCM_INFO_INTERLEAVED |
103 SNDRV_PCM_INFO_BLOCK_TRANSFER |
104 SNDRV_PCM_INFO_MMAP_VALID),
105 .formats = SNDRV_PCM_FMTBIT_U8,
106 .rates = SNDRV_PCM_RATE_8000,
107 .rate_min = SAMPLERATE,
108 .rate_max = SAMPLERATE,
111 .buffer_bytes_max = G723_PERIOD_BYTES * PERIODS,
112 .period_bytes_min = G723_PERIOD_BYTES,
113 .period_bytes_max = G723_PERIOD_BYTES,
114 .periods_min = PERIODS,
115 .periods_max = PERIODS,
118 static int snd_solo_pcm_open(struct snd_pcm_substream *ss)
120 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);
121 struct solo_snd_pcm *solo_pcm;
123 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);
124 if (solo_pcm == NULL)
127 solo_pcm->g723_buf = dma_alloc_coherent(&solo_dev->pdev->dev,
131 if (solo_pcm->g723_buf == NULL)
134 spin_lock_init(&solo_pcm->lock);
135 solo_pcm->solo_dev = solo_dev;
136 ss->runtime->hw = snd_solo_pcm_hw;
138 snd_pcm_substream_chip(ss) = solo_pcm;
147 static int snd_solo_pcm_close(struct snd_pcm_substream *ss)
149 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
151 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev;
152 dma_free_coherent(&solo_pcm->solo_dev->pdev->dev, G723_PERIOD_BYTES,
153 solo_pcm->g723_buf, solo_pcm->g723_dma);
159 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)
161 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
162 struct solo_dev *solo_dev = solo_pcm->solo_dev;
165 spin_lock(&solo_pcm->lock);
168 case SNDRV_PCM_TRIGGER_START:
169 if (solo_pcm->on == 0) {
170 /* If this is the first user, switch on interrupts */
171 if (atomic_inc_return(&solo_dev->snd_users) == 1)
172 solo_irq_on(solo_dev, SOLO_IRQ_G723);
176 case SNDRV_PCM_TRIGGER_STOP:
178 /* If this was our last user, switch them off */
179 if (atomic_dec_return(&solo_dev->snd_users) == 0)
180 solo_irq_off(solo_dev, SOLO_IRQ_G723);
188 spin_unlock(&solo_pcm->lock);
193 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)
198 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)
200 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
201 struct solo_dev *solo_dev = solo_pcm->solo_dev;
202 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f;
204 return idx * G723_FRAMES_PER_PAGE;
207 static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,
208 unsigned long pos, struct iov_iter *dst,
211 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);
212 struct solo_dev *solo_dev = solo_pcm->solo_dev;
215 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {
216 int page = (pos / G723_FRAMES_PER_PAGE) + i;
218 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma,
219 SOLO_G723_EXT_ADDR(solo_dev) +
220 (page * G723_PERIOD_BLOCK) +
221 (ss->number * G723_PERIOD_BYTES),
222 G723_PERIOD_BYTES, 0, 0);
226 if (copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst) !=
234 static const struct snd_pcm_ops snd_solo_pcm_ops = {
235 .open = snd_solo_pcm_open,
236 .close = snd_solo_pcm_close,
237 .prepare = snd_solo_pcm_prepare,
238 .trigger = snd_solo_pcm_trigger,
239 .pointer = snd_solo_pcm_pointer,
240 .copy = snd_solo_pcm_copy,
243 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,
244 struct snd_ctl_elem_info *info)
246 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
248 info->value.integer.min = 0;
249 info->value.integer.max = 15;
250 info->value.integer.step = 1;
255 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,
256 struct snd_ctl_elem_value *value)
258 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
259 u8 ch = value->id.numid - 1;
261 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);
266 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,
267 struct snd_ctl_elem_value *value)
269 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);
270 u8 ch = value->id.numid - 1;
273 old_val = tw28_get_audio_gain(solo_dev, ch);
274 if (old_val == value->value.integer.value[0])
277 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);
282 static const struct snd_kcontrol_new snd_solo_capture_volume = {
283 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
284 .name = "Capture Volume",
285 .info = snd_solo_capture_volume_info,
286 .get = snd_solo_capture_volume_get,
287 .put = snd_solo_capture_volume_put,
290 static int solo_snd_pcm_init(struct solo_dev *solo_dev)
292 struct snd_card *card = solo_dev->snd_card;
294 struct snd_pcm_substream *ss;
298 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,
303 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
306 snd_pcm_chip(pcm) = solo_dev;
308 strscpy(pcm->name, card->shortname, sizeof(pcm->name));
310 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
311 ss; ss = ss->next, i++)
312 sprintf(ss->name, "Camera #%d Audio", i);
314 snd_pcm_set_managed_buffer_all(pcm,
315 SNDRV_DMA_TYPE_CONTINUOUS,
317 G723_PERIOD_BYTES * PERIODS,
318 G723_PERIOD_BYTES * PERIODS);
320 solo_dev->snd_pcm = pcm;
325 int solo_g723_init(struct solo_dev *solo_dev)
327 static struct snd_device_ops ops = { };
328 struct snd_card *card;
329 struct snd_kcontrol_new kctl;
333 atomic_set(&solo_dev->snd_users, 0);
335 /* Allows for easier mapping between video and audio */
336 sprintf(name, "Softlogic%d", solo_dev->vfd->num);
338 ret = snd_card_new(&solo_dev->pdev->dev,
339 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,
340 &solo_dev->snd_card);
344 card = solo_dev->snd_card;
346 strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver));
347 strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname));
348 sprintf(card->longname, "%s on %s IRQ %d", card->shortname,
349 pci_name(solo_dev->pdev), solo_dev->pdev->irq);
351 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);
356 strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername));
357 kctl = snd_solo_capture_volume;
358 kctl.count = solo_dev->nr_chans;
360 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));
364 ret = solo_snd_pcm_init(solo_dev);
368 ret = snd_card_register(card);
372 solo_g723_config(solo_dev);
374 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);
383 void solo_g723_exit(struct solo_dev *solo_dev)
385 if (!solo_dev->snd_card)
388 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);
389 solo_irq_off(solo_dev, SOLO_IRQ_G723);
391 snd_card_free(solo_dev->snd_card);
392 solo_dev->snd_card = NULL;