1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 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 32 29 #define G723_PERIOD_BYTES 48 30 #define G723_PERIOD_BLOCK 1024 31 #define G723_FRAMES_PER_PAGE 48 32 33 /* Sets up channels 16-19 for decoding and 0-15 for encoding */ 34 #define OUTMODE_MASK 0x300 35 36 #define SAMPLERATE 8000 37 #define BITRATE 25 38 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 */ 44 45 struct 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 53 static 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_ENABLE 71 | SOLO_AUDIO_I2S_MODE 72 | SOLO_AUDIO_I2S_MULTI(3) 73 | SOLO_AUDIO_MODE(OUTMODE_MASK)); 74 } 75 76 void 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 } 99 100 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, 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 }; 117 118 static 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; 141 142 oom: 143 kfree(solo_pcm); 144 return -ENOMEM; 145 } 146 147 static 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 } 158 159 static 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 } 192 193 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss) 194 { 195 return 0; 196 } 197 198 static 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 } 206 207 static 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 } 233 234 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, 241 }; 242 243 static 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 } 254 255 static 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 } 265 266 static 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 } 281 282 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, 288 }; 289 290 static 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 } 324 325 int 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; 377 378 snd_error: 379 snd_card_free(card); 380 return ret; 381 } 382 383 void 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