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 int snd_solo_hw_params(struct snd_pcm_substream *ss, 101 struct snd_pcm_hw_params *hw_params) 102 { 103 return snd_pcm_lib_malloc_pages(ss, params_buffer_bytes(hw_params)); 104 } 105 106 static int snd_solo_hw_free(struct snd_pcm_substream *ss) 107 { 108 return snd_pcm_lib_free_pages(ss); 109 } 110 111 static const struct snd_pcm_hardware snd_solo_pcm_hw = { 112 .info = (SNDRV_PCM_INFO_MMAP | 113 SNDRV_PCM_INFO_INTERLEAVED | 114 SNDRV_PCM_INFO_BLOCK_TRANSFER | 115 SNDRV_PCM_INFO_MMAP_VALID), 116 .formats = SNDRV_PCM_FMTBIT_U8, 117 .rates = SNDRV_PCM_RATE_8000, 118 .rate_min = SAMPLERATE, 119 .rate_max = SAMPLERATE, 120 .channels_min = 1, 121 .channels_max = 1, 122 .buffer_bytes_max = G723_PERIOD_BYTES * PERIODS, 123 .period_bytes_min = G723_PERIOD_BYTES, 124 .period_bytes_max = G723_PERIOD_BYTES, 125 .periods_min = PERIODS, 126 .periods_max = PERIODS, 127 }; 128 129 static int snd_solo_pcm_open(struct snd_pcm_substream *ss) 130 { 131 struct solo_dev *solo_dev = snd_pcm_substream_chip(ss); 132 struct solo_snd_pcm *solo_pcm; 133 134 solo_pcm = kzalloc(sizeof(*solo_pcm), GFP_KERNEL); 135 if (solo_pcm == NULL) 136 goto oom; 137 138 solo_pcm->g723_buf = pci_alloc_consistent(solo_dev->pdev, 139 G723_PERIOD_BYTES, 140 &solo_pcm->g723_dma); 141 if (solo_pcm->g723_buf == NULL) 142 goto oom; 143 144 spin_lock_init(&solo_pcm->lock); 145 solo_pcm->solo_dev = solo_dev; 146 ss->runtime->hw = snd_solo_pcm_hw; 147 148 snd_pcm_substream_chip(ss) = solo_pcm; 149 150 return 0; 151 152 oom: 153 kfree(solo_pcm); 154 return -ENOMEM; 155 } 156 157 static int snd_solo_pcm_close(struct snd_pcm_substream *ss) 158 { 159 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 160 161 snd_pcm_substream_chip(ss) = solo_pcm->solo_dev; 162 pci_free_consistent(solo_pcm->solo_dev->pdev, G723_PERIOD_BYTES, 163 solo_pcm->g723_buf, solo_pcm->g723_dma); 164 kfree(solo_pcm); 165 166 return 0; 167 } 168 169 static int snd_solo_pcm_trigger(struct snd_pcm_substream *ss, int cmd) 170 { 171 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 172 struct solo_dev *solo_dev = solo_pcm->solo_dev; 173 int ret = 0; 174 175 spin_lock(&solo_pcm->lock); 176 177 switch (cmd) { 178 case SNDRV_PCM_TRIGGER_START: 179 if (solo_pcm->on == 0) { 180 /* If this is the first user, switch on interrupts */ 181 if (atomic_inc_return(&solo_dev->snd_users) == 1) 182 solo_irq_on(solo_dev, SOLO_IRQ_G723); 183 solo_pcm->on = 1; 184 } 185 break; 186 case SNDRV_PCM_TRIGGER_STOP: 187 if (solo_pcm->on) { 188 /* If this was our last user, switch them off */ 189 if (atomic_dec_return(&solo_dev->snd_users) == 0) 190 solo_irq_off(solo_dev, SOLO_IRQ_G723); 191 solo_pcm->on = 0; 192 } 193 break; 194 default: 195 ret = -EINVAL; 196 } 197 198 spin_unlock(&solo_pcm->lock); 199 200 return ret; 201 } 202 203 static int snd_solo_pcm_prepare(struct snd_pcm_substream *ss) 204 { 205 return 0; 206 } 207 208 static snd_pcm_uframes_t snd_solo_pcm_pointer(struct snd_pcm_substream *ss) 209 { 210 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 211 struct solo_dev *solo_dev = solo_pcm->solo_dev; 212 snd_pcm_uframes_t idx = solo_reg_read(solo_dev, SOLO_AUDIO_STA) & 0x1f; 213 214 return idx * G723_FRAMES_PER_PAGE; 215 } 216 217 static int snd_solo_pcm_copy_user(struct snd_pcm_substream *ss, int channel, 218 unsigned long pos, void __user *dst, 219 unsigned long count) 220 { 221 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 222 struct solo_dev *solo_dev = solo_pcm->solo_dev; 223 int err, i; 224 225 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { 226 int page = (pos / G723_FRAMES_PER_PAGE) + i; 227 228 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, 229 SOLO_G723_EXT_ADDR(solo_dev) + 230 (page * G723_PERIOD_BLOCK) + 231 (ss->number * G723_PERIOD_BYTES), 232 G723_PERIOD_BYTES, 0, 0); 233 if (err) 234 return err; 235 236 if (copy_to_user(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES)) 237 return -EFAULT; 238 dst += G723_PERIOD_BYTES; 239 } 240 241 return 0; 242 } 243 244 static int snd_solo_pcm_copy_kernel(struct snd_pcm_substream *ss, int channel, 245 unsigned long pos, void *dst, 246 unsigned long count) 247 { 248 struct solo_snd_pcm *solo_pcm = snd_pcm_substream_chip(ss); 249 struct solo_dev *solo_dev = solo_pcm->solo_dev; 250 int err, i; 251 252 for (i = 0; i < (count / G723_FRAMES_PER_PAGE); i++) { 253 int page = (pos / G723_FRAMES_PER_PAGE) + i; 254 255 err = solo_p2m_dma_t(solo_dev, 0, solo_pcm->g723_dma, 256 SOLO_G723_EXT_ADDR(solo_dev) + 257 (page * G723_PERIOD_BLOCK) + 258 (ss->number * G723_PERIOD_BYTES), 259 G723_PERIOD_BYTES, 0, 0); 260 if (err) 261 return err; 262 263 memcpy(dst, solo_pcm->g723_buf, G723_PERIOD_BYTES); 264 dst += G723_PERIOD_BYTES; 265 } 266 267 return 0; 268 } 269 270 static const struct snd_pcm_ops snd_solo_pcm_ops = { 271 .open = snd_solo_pcm_open, 272 .close = snd_solo_pcm_close, 273 .ioctl = snd_pcm_lib_ioctl, 274 .hw_params = snd_solo_hw_params, 275 .hw_free = snd_solo_hw_free, 276 .prepare = snd_solo_pcm_prepare, 277 .trigger = snd_solo_pcm_trigger, 278 .pointer = snd_solo_pcm_pointer, 279 .copy_user = snd_solo_pcm_copy_user, 280 .copy_kernel = snd_solo_pcm_copy_kernel, 281 }; 282 283 static int snd_solo_capture_volume_info(struct snd_kcontrol *kcontrol, 284 struct snd_ctl_elem_info *info) 285 { 286 info->type = SNDRV_CTL_ELEM_TYPE_INTEGER; 287 info->count = 1; 288 info->value.integer.min = 0; 289 info->value.integer.max = 15; 290 info->value.integer.step = 1; 291 292 return 0; 293 } 294 295 static int snd_solo_capture_volume_get(struct snd_kcontrol *kcontrol, 296 struct snd_ctl_elem_value *value) 297 { 298 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); 299 u8 ch = value->id.numid - 1; 300 301 value->value.integer.value[0] = tw28_get_audio_gain(solo_dev, ch); 302 303 return 0; 304 } 305 306 static int snd_solo_capture_volume_put(struct snd_kcontrol *kcontrol, 307 struct snd_ctl_elem_value *value) 308 { 309 struct solo_dev *solo_dev = snd_kcontrol_chip(kcontrol); 310 u8 ch = value->id.numid - 1; 311 u8 old_val; 312 313 old_val = tw28_get_audio_gain(solo_dev, ch); 314 if (old_val == value->value.integer.value[0]) 315 return 0; 316 317 tw28_set_audio_gain(solo_dev, ch, value->value.integer.value[0]); 318 319 return 1; 320 } 321 322 static const struct snd_kcontrol_new snd_solo_capture_volume = { 323 .iface = SNDRV_CTL_ELEM_IFACE_MIXER, 324 .name = "Capture Volume", 325 .info = snd_solo_capture_volume_info, 326 .get = snd_solo_capture_volume_get, 327 .put = snd_solo_capture_volume_put, 328 }; 329 330 static int solo_snd_pcm_init(struct solo_dev *solo_dev) 331 { 332 struct snd_card *card = solo_dev->snd_card; 333 struct snd_pcm *pcm; 334 struct snd_pcm_substream *ss; 335 int ret; 336 int i; 337 338 ret = snd_pcm_new(card, card->driver, 0, 0, solo_dev->nr_chans, 339 &pcm); 340 if (ret < 0) 341 return ret; 342 343 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, 344 &snd_solo_pcm_ops); 345 346 snd_pcm_chip(pcm) = solo_dev; 347 pcm->info_flags = 0; 348 strscpy(pcm->name, card->shortname, sizeof(pcm->name)); 349 350 for (i = 0, ss = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream; 351 ss; ss = ss->next, i++) 352 sprintf(ss->name, "Camera #%d Audio", i); 353 354 snd_pcm_lib_preallocate_pages_for_all(pcm, 355 SNDRV_DMA_TYPE_CONTINUOUS, 356 NULL, 357 G723_PERIOD_BYTES * PERIODS, 358 G723_PERIOD_BYTES * PERIODS); 359 360 solo_dev->snd_pcm = pcm; 361 362 return 0; 363 } 364 365 int solo_g723_init(struct solo_dev *solo_dev) 366 { 367 static struct snd_device_ops ops = { }; 368 struct snd_card *card; 369 struct snd_kcontrol_new kctl; 370 char name[32]; 371 int ret; 372 373 atomic_set(&solo_dev->snd_users, 0); 374 375 /* Allows for easier mapping between video and audio */ 376 sprintf(name, "Softlogic%d", solo_dev->vfd->num); 377 378 ret = snd_card_new(&solo_dev->pdev->dev, 379 SNDRV_DEFAULT_IDX1, name, THIS_MODULE, 0, 380 &solo_dev->snd_card); 381 if (ret < 0) 382 return ret; 383 384 card = solo_dev->snd_card; 385 386 strscpy(card->driver, SOLO6X10_NAME, sizeof(card->driver)); 387 strscpy(card->shortname, "SOLO-6x10 Audio", sizeof(card->shortname)); 388 sprintf(card->longname, "%s on %s IRQ %d", card->shortname, 389 pci_name(solo_dev->pdev), solo_dev->pdev->irq); 390 391 ret = snd_device_new(card, SNDRV_DEV_LOWLEVEL, solo_dev, &ops); 392 if (ret < 0) 393 goto snd_error; 394 395 /* Mixer controls */ 396 strscpy(card->mixername, "SOLO-6x10", sizeof(card->mixername)); 397 kctl = snd_solo_capture_volume; 398 kctl.count = solo_dev->nr_chans; 399 400 ret = snd_ctl_add(card, snd_ctl_new1(&kctl, solo_dev)); 401 if (ret < 0) 402 return ret; 403 404 ret = solo_snd_pcm_init(solo_dev); 405 if (ret < 0) 406 goto snd_error; 407 408 ret = snd_card_register(card); 409 if (ret < 0) 410 goto snd_error; 411 412 solo_g723_config(solo_dev); 413 414 dev_info(&solo_dev->pdev->dev, "Alsa sound card as %s\n", name); 415 416 return 0; 417 418 snd_error: 419 snd_card_free(card); 420 return ret; 421 } 422 423 void solo_g723_exit(struct solo_dev *solo_dev) 424 { 425 if (!solo_dev->snd_card) 426 return; 427 428 solo_reg_write(solo_dev, SOLO_AUDIO_CONTROL, 0); 429 solo_irq_off(solo_dev, SOLO_IRQ_G723); 430 431 snd_card_free(solo_dev->snd_card); 432 solo_dev->snd_card = NULL; 433 } 434