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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Copyright (C) 2010-2013 Bluecherry, LLC <https://www.bluecherrydvr.com>4 *5 * Original author:6 * Ben Collins <bcollins@ubuntu.com>7 *8 * Additional work by:9 * John Brooks <john.brooks@bluecherry.net>10 */11 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>19 20#include <sound/core.h>21#include <sound/initval.h>22#include <sound/pcm.h>23#include <sound/control.h>24 25#include "solo6x10.h"26#include "solo6x10-tw28.h"27 28#define G723_FDMA_PAGES 3229#define G723_PERIOD_BYTES 4830#define G723_PERIOD_BLOCK 102431#define G723_FRAMES_PER_PAGE 4832 33/* Sets up channels 16-19 for decoding and 0-15 for encoding */34#define OUTMODE_MASK 0x30035 36#define SAMPLERATE 800037#define BITRATE 2538 39/* The solo writes to 1k byte pages, 32 pages, in the dma. Each 1k page40 * 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_PAGES43#define G723_INTR_ORDER 4 /* 0 - 4 */44 45struct solo_snd_pcm {46 int on;47 spinlock_t lock;48 struct solo_dev *solo_dev;49 u8 *g723_buf;50 dma_addr_t g723_dma;51};52 53static void solo_g723_config(struct solo_dev *solo_dev)54{55 int clk_div;56 57 clk_div = (solo_dev->clock_mhz * 1000000)58 / (SAMPLERATE * (BITRATE * 2) * 2);59 60 solo_reg_write(solo_dev, SOLO_AUDIO_SAMPLE,61 SOLO_AUDIO_BITRATE(BITRATE)62 | SOLO_AUDIO_CLK_DIV(clk_div));63 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));68 69 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL,70 SOLO_AUDIO_ENABLE71 | SOLO_AUDIO_I2S_MODE72 | SOLO_AUDIO_I2S_MULTI(3)73 | SOLO_AUDIO_MODE(OUTMODE_MASK));74}75 76void solo_g723_isr(struct solo_dev *solo_dev)77{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;82 83 for (ss = pstr->substream; ss != NULL; ss = ss->next) {84 if (snd_pcm_substream_chip(ss) == NULL)85 continue;86 87 /* This means open() hasn't been called on this one */88 if (snd_pcm_substream_chip(ss) == solo_dev)89 continue;90 91 /* Haven't triggered a start yet */92 solo_pcm = snd_pcm_substream_chip(ss);93 if (!solo_pcm->on)94 continue;95 96 snd_pcm_period_elapsed(ss);97 }98}99 100static 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,109 .channels_min = 1,110 .channels_max = 1,111 .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,116};117 118static int snd_solo_pcm_open(struct snd_pcm_substream *ss)119{120 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss);121 struct solo_snd_pcm *solo_pcm;122 123 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL);124 if (solo_pcm == NULL)125 goto oom;126 127 solo_pcm->g723_buf = dma_alloc_coherent(&solo_dev->pdev->dev,128 G723_PERIOD_BYTES,129 &solo_pcm->g723_dma,130 GFP_KERNEL);131 if (solo_pcm->g723_buf == NULL)132 goto oom;133 134 spin_lock_init(&solo_pcm->lock);135 solo_pcm->solo_dev = solo_dev;136 ss->runtime->hw = snd_solo_pcm_hw;137 138 snd_pcm_substream_chip(ss) = solo_pcm;139 140 return 0;141 142oom:143 kfree(solo_pcm);144 return -ENOMEM;145}146 147static int snd_solo_pcm_close(struct snd_pcm_substream *ss)148{149 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);150 151 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);154 kfree(solo_pcm);155 156 return 0;157}158 159static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd)160{161 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);162 struct solo_dev *solo_dev = solo_pcm->solo_dev;163 int ret = 0;164 165 spin_lock(&solo_pcm->lock);166 167 switch (cmd) {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);173 solo_pcm->on = 1;174 }175 break;176 case SNDRV_PCM_TRIGGER_STOP:177 if (solo_pcm->on) {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);181 solo_pcm->on = 0;182 }183 break;184 default:185 ret = -EINVAL;186 }187 188 spin_unlock(&solo_pcm->lock);189 190 return ret;191}192 193static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss)194{195 return 0;196}197 198static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss)199{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;203 204 return idx * G723_FRAMES_PER_PAGE;205}206 207static int snd_solo_pcm_copy(struct snd_pcm_substream *ss, int channel,208 unsigned long pos, struct iov_iter *dst,209 unsigned long count)210{211 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss);212 struct solo_dev *solo_dev = solo_pcm->solo_dev;213 int err, i;214 215 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) {216 int page = (pos / G723_FRAMES_PER_PAGE) + i;217 218 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);223 if (err)224 return err;225 226 if (copy_to_iter(solo_pcm->g723_buf, G723_PERIOD_BYTES, dst) !=227 G723_PERIOD_BYTES)228 return -EFAULT;229 }230 231 return 0;232}233 234static 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,241};242 243static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol,244 struct snd_ctl_elem_info *info)245{246 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;247 info->count = 1;248 info->value.integer.min = 0;249 info->value.integer.max = 15;250 info->value.integer.step = 1;251 252 return 0;253}254 255static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol,256 struct snd_ctl_elem_value *value)257{258 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);259 u8 ch = value->id.numid - 1;260 261 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch);262 263 return 0;264}265 266static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol,267 struct snd_ctl_elem_value *value)268{269 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol);270 u8 ch = value->id.numid - 1;271 u8 old_val;272 273 old_val = tw28_get_audio_gain(solo_dev, ch);274 if (old_val == value->value.integer.value[0])275 return 0;276 277 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]);278 279 return 1;280}281 282static 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,288};289 290static int solo_snd_pcm_init(struct solo_dev *solo_dev)291{292 struct snd_card *card = solo_dev->snd_card;293 struct snd_pcm *pcm;294 struct snd_pcm_substream *ss;295 int ret;296 int i;297 298 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans,299 &pcm);300 if (ret < 0)301 return ret;302 303 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,304 &snd_solo_pcm_ops);305 306 snd_pcm_chip(pcm) = solo_dev;307 pcm->info_flags = 0;308 strscpy(pcm->name, card->shortname, sizeof(pcm->name));309 310 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);313 314 snd_pcm_set_managed_buffer_all(pcm,315 SNDRV_DMA_TYPE_CONTINUOUS,316 NULL,317 G723_PERIOD_BYTES * PERIODS,318 G723_PERIOD_BYTES * PERIODS);319 320 solo_dev->snd_pcm = pcm;321 322 return 0;323}324 325int solo_g723_init(struct solo_dev *solo_dev)326{327 static struct snd_device_ops ops = { };328 struct snd_card *card;329 struct snd_kcontrol_new kctl;330 char name[32];331 int ret;332 333 atomic_set(&solo_dev->snd_users, 0);334 335 /* Allows for easier mapping between video and audio */336 sprintf(name, "Softlogic%d", solo_dev->vfd->num);337 338 ret = snd_card_new(&solo_dev->pdev->dev,339 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0,340 &solo_dev->snd_card);341 if (ret < 0)342 return ret;343 344 card = solo_dev->snd_card;345 346 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);350 351 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops);352 if (ret < 0)353 goto snd_error;354 355 /* Mixer controls */356 strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername));357 kctl = snd_solo_capture_volume;358 kctl.count = solo_dev->nr_chans;359 360 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev));361 if (ret < 0)362 goto snd_error;363 364 ret = solo_snd_pcm_init(solo_dev);365 if (ret < 0)366 goto snd_error;367 368 ret = snd_card_register(card);369 if (ret < 0)370 goto snd_error;371 372 solo_g723_config(solo_dev);373 374 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name);375 376 return 0;377 378snd_error:379 snd_card_free(card);380 return ret;381}382 383void solo_g723_exit(struct solo_dev *solo_dev)384{385 if (!solo_dev->snd_card)386 return;387 388 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0);389 solo_irq_off(solo_dev, SOLO_IRQ_G723);390 391 snd_card_free(solo_dev->snd_card);392 solo_dev->snd_card = NULL;393}394