1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* 3 * Copyright (C) 2010-2013 Bluecherry, LLC <http://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 = pci_alloc_consistent(solo_dev->pdev, 128 G723_PERIOD_BYTES, 129 &solo_pcm->g723_dma); 130 if (solo_pcm->g723_buf == NULL) 131 goto oom; 132 133 spin_lock_init(&solo_pcm->lock); 134 solo_pcm->solo_dev = solo_dev; 135 ss->runtime->hw = snd_solo_pcm_hw; 136 137 snd_pcm_substream_chip(ss) = solo_pcm; 138 139 return 0; 140 141 oom: 142 kfree(solo_pcm); 143 return -ENOMEM; 144 } 145 146 static int snd_solo_pcm_close(struct snd_pcm_substream *ss) 147 { 148 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 149 150 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev; 151 pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES, 152 solo_pcm->g723_buf, solo_pcm->g723_dma); 153 kfree(solo_pcm); 154 155 return 0; 156 } 157 158 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd) 159 { 160 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 161 struct solo_dev *solo_dev = solo_pcm->solo_dev; 162 int ret = 0; 163 164 spin_lock(&solo_pcm->lock); 165 166 switch (cmd) { 167 case SNDRV_PCM_TRIGGER_START: 168 if (solo_pcm->on == 0) { 169 /* If this is the first user, switch on interrupts */ 170 if (atomic_inc_return(&solo_dev->snd_users) == 1) 171 solo_irq_on(solo_dev, SOLO_IRQ_G723); 172 solo_pcm->on = 1; 173 } 174 break; 175 case SNDRV_PCM_TRIGGER_STOP: 176 if (solo_pcm->on) { 177 /* If this was our last user, switch them off */ 178 if (atomic_dec_return(&solo_dev->snd_users) == 0) 179 solo_irq_off(solo_dev, SOLO_IRQ_G723); 180 solo_pcm->on = 0; 181 } 182 break; 183 default: 184 ret = -EINVAL; 185 } 186 187 spin_unlock(&solo_pcm->lock); 188 189 return ret; 190 } 191 192 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss) 193 { 194 return 0; 195 } 196 197 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss) 198 { 199 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 200 struct solo_dev *solo_dev = solo_pcm->solo_dev; 201 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f; 202 203 return idx * G723_FRAMES_PER_PAGE; 204 } 205 206 static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, 207 unsigned long pos, void __user *dst, 208 unsigned long count) 209 { 210 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 211 struct solo_dev *solo_dev = solo_pcm->solo_dev; 212 int err, i; 213 214 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { 215 int page = (pos / G723_FRAMES_PER_PAGE) + i; 216 217 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, 218 SOLO_G723_EXT_ADDR(solo_dev) + 219 (page * G723_PERIOD_BLOCK) + 220 (ss->number * G723_PERIOD_BYTES), 221 G723_PERIOD_BYTES, 0, 0); 222 if (err) 223 return err; 224 225 if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) 226 return -EFAULT; 227 dst += G723_PERIOD_BYTES; 228 } 229 230 return 0; 231 } 232 233 static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, 234 unsigned long pos, void *dst, 235 unsigned long count) 236 { 237 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 238 struct solo_dev *solo_dev = solo_pcm->solo_dev; 239 int err, i; 240 241 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { 242 int page = (pos / G723_FRAMES_PER_PAGE) + i; 243 244 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, 245 SOLO_G723_EXT_ADDR(solo_dev) + 246 (page * G723_PERIOD_BLOCK) + 247 (ss->number * G723_PERIOD_BYTES), 248 G723_PERIOD_BYTES, 0, 0); 249 if (err) 250 return err; 251 252 memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES); 253 dst += G723_PERIOD_BYTES; 254 } 255 256 return 0; 257 } 258 259 static const struct snd_pcm_ops snd_solo_pcm_ops = { 260 .open = snd_solo_pcm_open, 261 .close = snd_solo_pcm_close, 262 .prepare = snd_solo_pcm_prepare, 263 .trigger = snd_solo_pcm_trigger, 264 .pointer = snd_solo_pcm_pointer, 265 .copy_user = snd_solo_pcm_copy_user, 266 .copy_kernel = snd_solo_pcm_copy_kernel, 267 }; 268 269 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, 270 struct snd_ctl_elem_info *info) 271 { 272 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 273 info->count = 1; 274 info->value.integer.min = 0; 275 info->value.integer.max = 15; 276 info->value.integer.step = 1; 277 278 return 0; 279 } 280 281 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol, 282 struct snd_ctl_elem_value *value) 283 { 284 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); 285 u8 ch = value->id.numid - 1; 286 287 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch); 288 289 return 0; 290 } 291 292 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol, 293 struct snd_ctl_elem_value *value) 294 { 295 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); 296 u8 ch = value->id.numid - 1; 297 u8 old_val; 298 299 old_val = tw28_get_audio_gain(solo_dev, ch); 300 if (old_val == value->value.integer.value[0]) 301 return 0; 302 303 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]); 304 305 return 1; 306 } 307 308 static const 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, 314 }; 315 316 static int solo_snd_pcm_init(struct solo_dev *solo_dev) 317 { 318 struct snd_card *card = solo_dev->snd_card; 319 struct snd_pcm *pcm; 320 struct snd_pcm_substream *ss; 321 int ret; 322 int i; 323 324 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans, 325 &pcm); 326 if (ret < 0) 327 return ret; 328 329 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 330 &snd_solo_pcm_ops); 331 332 snd_pcm_chip(pcm) = solo_dev; 333 pcm->info_flags = 0; 334 strscpy(pcm->name, card->shortname, sizeof(pcm->name)); 335 336 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); 339 340 snd_pcm_set_managed_buffer_all(pcm, 341 SNDRV_DMA_TYPE_CONTINUOUS, 342 NULL, 343 G723_PERIOD_BYTES * PERIODS, 344 G723_PERIOD_BYTES * PERIODS); 345 346 solo_dev->snd_pcm = pcm; 347 348 return 0; 349 } 350 351 int solo_g723_init(struct solo_dev *solo_dev) 352 { 353 static struct snd_device_ops ops = { }; 354 struct snd_card *card; 355 struct snd_kcontrol_new kctl; 356 char name[32]; 357 int ret; 358 359 atomic_set(&solo_dev->snd_users, 0); 360 361 /* Allows for easier mapping between video and audio */ 362 sprintf(name, "Softlogic%d", solo_dev->vfd->num); 363 364 ret = snd_card_new(&solo_dev->pdev->dev, 365 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0, 366 &solo_dev->snd_card); 367 if (ret < 0) 368 return ret; 369 370 card = solo_dev->snd_card; 371 372 strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver)); 373 strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname)); 374 sprintf(card->longname, "%s on %s IRQ %d", card->shortname, 375 pci_name(solo_dev->pdev), solo_dev->pdev->irq); 376 377 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops); 378 if (ret < 0) 379 goto snd_error; 380 381 /* Mixer controls */ 382 strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername)); 383 kctl = snd_solo_capture_volume; 384 kctl.count = solo_dev->nr_chans; 385 386 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev)); 387 if (ret < 0) 388 return ret; 389 390 ret = solo_snd_pcm_init(solo_dev); 391 if (ret < 0) 392 goto snd_error; 393 394 ret = snd_card_register(card); 395 if (ret < 0) 396 goto snd_error; 397 398 solo_g723_config(solo_dev); 399 400 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name); 401 402 return 0; 403 404 snd_error: 405 snd_card_free(card); 406 return ret; 407 } 408 409 void solo_g723_exit(struct solo_dev *solo_dev) 410 { 411 if (!solo_dev->snd_card) 412 return; 413 414 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0); 415 solo_irq_off(solo_dev, SOLO_IRQ_G723); 416 417 snd_card_free(solo_dev->snd_card); 418 solo_dev->snd_card = NULL; 419 } 420