1 /* 2 * ALSA SoC WL1273 codec driver 3 * 4 * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com> 5 * 6 * Copyright: (C) 2010 Nokia Corporation 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License 10 * version 2 as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope that it will be useful, but 13 * WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * General Public License for more details. 16 * 17 * You should have received a copy of the GNU General Public License 18 * along with this program; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 20 * 02110-1301 USA 21 * 22 */ 23 24 #include <linux/mfd/wl1273-core.h> 25 #include <linux/slab.h> 26 #include <sound/pcm.h> 27 #include <sound/pcm_params.h> 28 #include <sound/soc.h> 29 #include <sound/initval.h> 30 31 #include "wl1273.h" 32 33 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX }; 34 35 /* codec private data */ 36 struct wl1273_priv { 37 enum wl1273_mode mode; 38 struct wl1273_core *core; 39 unsigned int channels; 40 }; 41 42 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core, 43 int rate, int width) 44 { 45 struct device *dev = &core->client->dev; 46 int r = 0; 47 u16 mode; 48 49 dev_dbg(dev, "rate: %d\n", rate); 50 dev_dbg(dev, "width: %d\n", width); 51 52 mutex_lock(&core->lock); 53 54 mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE; 55 56 switch (rate) { 57 case 48000: 58 mode |= WL1273_IS2_RATE_48K; 59 break; 60 case 44100: 61 mode |= WL1273_IS2_RATE_44_1K; 62 break; 63 case 32000: 64 mode |= WL1273_IS2_RATE_32K; 65 break; 66 case 22050: 67 mode |= WL1273_IS2_RATE_22_05K; 68 break; 69 case 16000: 70 mode |= WL1273_IS2_RATE_16K; 71 break; 72 case 12000: 73 mode |= WL1273_IS2_RATE_12K; 74 break; 75 case 11025: 76 mode |= WL1273_IS2_RATE_11_025; 77 break; 78 case 8000: 79 mode |= WL1273_IS2_RATE_8K; 80 break; 81 default: 82 dev_err(dev, "Sampling rate: %d not supported\n", rate); 83 r = -EINVAL; 84 goto out; 85 } 86 87 switch (width) { 88 case 16: 89 mode |= WL1273_IS2_WIDTH_32; 90 break; 91 case 20: 92 mode |= WL1273_IS2_WIDTH_40; 93 break; 94 case 24: 95 mode |= WL1273_IS2_WIDTH_48; 96 break; 97 case 25: 98 mode |= WL1273_IS2_WIDTH_50; 99 break; 100 case 30: 101 mode |= WL1273_IS2_WIDTH_60; 102 break; 103 case 32: 104 mode |= WL1273_IS2_WIDTH_64; 105 break; 106 case 40: 107 mode |= WL1273_IS2_WIDTH_80; 108 break; 109 case 48: 110 mode |= WL1273_IS2_WIDTH_96; 111 break; 112 case 64: 113 mode |= WL1273_IS2_WIDTH_128; 114 break; 115 default: 116 dev_err(dev, "Data width: %d not supported\n", width); 117 r = -EINVAL; 118 goto out; 119 } 120 121 dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE); 122 dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode); 123 dev_dbg(dev, "mode: 0x%04x\n", mode); 124 125 if (core->i2s_mode != mode) { 126 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode); 127 if (r) 128 goto out; 129 130 core->i2s_mode = mode; 131 r = core->write(core, WL1273_AUDIO_ENABLE, 132 WL1273_AUDIO_ENABLE_I2S); 133 if (r) 134 goto out; 135 } 136 out: 137 mutex_unlock(&core->lock); 138 139 return r; 140 } 141 142 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core, 143 int channel_number) 144 { 145 struct device *dev = &core->client->dev; 146 int r = 0; 147 148 dev_dbg(dev, "%s\n", __func__); 149 150 mutex_lock(&core->lock); 151 152 if (core->channel_number == channel_number) 153 goto out; 154 155 if (channel_number == 1 && core->mode == WL1273_MODE_RX) 156 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO); 157 else if (channel_number == 1 && core->mode == WL1273_MODE_TX) 158 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO); 159 else if (channel_number == 2 && core->mode == WL1273_MODE_RX) 160 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO); 161 else if (channel_number == 2 && core->mode == WL1273_MODE_TX) 162 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO); 163 else 164 r = -EINVAL; 165 out: 166 mutex_unlock(&core->lock); 167 168 return r; 169 } 170 171 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol, 172 struct snd_ctl_elem_value *ucontrol) 173 { 174 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 175 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 176 177 ucontrol->value.integer.value[0] = wl1273->mode; 178 179 return 0; 180 } 181 182 static const char *wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" }; 183 184 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol, 185 struct snd_ctl_elem_value *ucontrol) 186 { 187 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 188 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 189 190 if (wl1273->mode == ucontrol->value.integer.value[0]) 191 return 0; 192 193 /* Do not allow changes while stream is running */ 194 if (codec->active) 195 return -EPERM; 196 197 if (ucontrol->value.integer.value[0] < 0 || 198 ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route)) 199 return -EINVAL; 200 201 wl1273->mode = ucontrol->value.integer.value[0]; 202 203 return 1; 204 } 205 206 static const struct soc_enum wl1273_enum = 207 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route); 208 209 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol, 210 struct snd_ctl_elem_value *ucontrol) 211 { 212 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 213 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 214 215 dev_dbg(codec->dev, "%s: enter.\n", __func__); 216 217 ucontrol->value.integer.value[0] = wl1273->core->audio_mode; 218 219 return 0; 220 } 221 222 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol, 223 struct snd_ctl_elem_value *ucontrol) 224 { 225 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 226 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 227 int val, r = 0; 228 229 dev_dbg(codec->dev, "%s: enter.\n", __func__); 230 231 val = ucontrol->value.integer.value[0]; 232 if (wl1273->core->audio_mode == val) 233 return 0; 234 235 r = wl1273->core->set_audio(wl1273->core, val); 236 if (r < 0) 237 return r; 238 239 return 1; 240 } 241 242 static const char *wl1273_audio_strings[] = { "Digital", "Analog" }; 243 244 static const struct soc_enum wl1273_audio_enum = 245 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings), 246 wl1273_audio_strings); 247 248 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol, 249 struct snd_ctl_elem_value *ucontrol) 250 { 251 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 252 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 253 254 dev_dbg(codec->dev, "%s: enter.\n", __func__); 255 256 ucontrol->value.integer.value[0] = wl1273->core->volume; 257 258 return 0; 259 } 260 261 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol, 262 struct snd_ctl_elem_value *ucontrol) 263 { 264 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 265 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 266 int r; 267 268 dev_dbg(codec->dev, "%s: enter.\n", __func__); 269 270 r = wl1273->core->set_volume(wl1273->core, 271 ucontrol->value.integer.value[0]); 272 if (r) 273 return r; 274 275 return 1; 276 } 277 278 static const struct snd_kcontrol_new wl1273_controls[] = { 279 SOC_ENUM_EXT("Codec Mode", wl1273_enum, 280 snd_wl1273_get_audio_route, snd_wl1273_set_audio_route), 281 SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum, 282 snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put), 283 SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0, 284 snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put), 285 }; 286 287 static int wl1273_startup(struct snd_pcm_substream *substream, 288 struct snd_soc_dai *dai) 289 { 290 struct snd_soc_pcm_runtime *rtd = substream->private_data; 291 struct snd_soc_codec *codec = rtd->codec; 292 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 293 294 switch (wl1273->mode) { 295 case WL1273_MODE_BT: 296 snd_pcm_hw_constraint_minmax(substream->runtime, 297 SNDRV_PCM_HW_PARAM_RATE, 298 8000, 8000); 299 snd_pcm_hw_constraint_minmax(substream->runtime, 300 SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1); 301 break; 302 case WL1273_MODE_FM_RX: 303 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 304 pr_err("Cannot play in RX mode.\n"); 305 return -EINVAL; 306 } 307 break; 308 case WL1273_MODE_FM_TX: 309 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 310 pr_err("Cannot capture in TX mode.\n"); 311 return -EINVAL; 312 } 313 break; 314 default: 315 return -EINVAL; 316 break; 317 } 318 319 return 0; 320 } 321 322 static int wl1273_hw_params(struct snd_pcm_substream *substream, 323 struct snd_pcm_hw_params *params, 324 struct snd_soc_dai *dai) 325 { 326 struct snd_soc_pcm_runtime *rtd = substream->private_data; 327 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(rtd->codec); 328 struct wl1273_core *core = wl1273->core; 329 unsigned int rate, width, r; 330 331 if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) { 332 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n"); 333 return -EINVAL; 334 } 335 336 rate = params_rate(params); 337 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min; 338 339 if (wl1273->mode == WL1273_MODE_BT) { 340 if (rate != 8000) { 341 pr_err("Rate %d not supported.\n", params_rate(params)); 342 return -EINVAL; 343 } 344 345 if (params_channels(params) != 1) { 346 pr_err("Only mono supported.\n"); 347 return -EINVAL; 348 } 349 350 return 0; 351 } 352 353 if (wl1273->mode == WL1273_MODE_FM_TX && 354 substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 355 pr_err("Only playback supported with TX.\n"); 356 return -EINVAL; 357 } 358 359 if (wl1273->mode == WL1273_MODE_FM_RX && 360 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 361 pr_err("Only capture supported with RX.\n"); 362 return -EINVAL; 363 } 364 365 if (wl1273->mode != WL1273_MODE_FM_RX && 366 wl1273->mode != WL1273_MODE_FM_TX) { 367 pr_err("Unexpected mode: %d.\n", wl1273->mode); 368 return -EINVAL; 369 } 370 371 r = snd_wl1273_fm_set_i2s_mode(core, rate, width); 372 if (r) 373 return r; 374 375 wl1273->channels = params_channels(params); 376 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels); 377 if (r) 378 return r; 379 380 return 0; 381 } 382 383 static struct snd_soc_dai_ops wl1273_dai_ops = { 384 .startup = wl1273_startup, 385 .hw_params = wl1273_hw_params, 386 }; 387 388 static struct snd_soc_dai_driver wl1273_dai = { 389 .name = "wl1273-fm", 390 .playback = { 391 .stream_name = "Playback", 392 .channels_min = 1, 393 .channels_max = 2, 394 .rates = SNDRV_PCM_RATE_8000_48000, 395 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 396 .capture = { 397 .stream_name = "Capture", 398 .channels_min = 1, 399 .channels_max = 2, 400 .rates = SNDRV_PCM_RATE_8000_48000, 401 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 402 .ops = &wl1273_dai_ops, 403 }; 404 405 /* Audio interface format for the soc_card driver */ 406 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt) 407 { 408 struct wl1273_priv *wl1273; 409 410 if (codec == NULL || fmt == NULL) 411 return -EINVAL; 412 413 wl1273 = snd_soc_codec_get_drvdata(codec); 414 415 switch (wl1273->mode) { 416 case WL1273_MODE_FM_RX: 417 case WL1273_MODE_FM_TX: 418 *fmt = SND_SOC_DAIFMT_I2S | 419 SND_SOC_DAIFMT_NB_NF | 420 SND_SOC_DAIFMT_CBM_CFM; 421 422 break; 423 case WL1273_MODE_BT: 424 *fmt = SND_SOC_DAIFMT_DSP_A | 425 SND_SOC_DAIFMT_IB_NF | 426 SND_SOC_DAIFMT_CBM_CFM; 427 428 break; 429 default: 430 return -EINVAL; 431 } 432 433 return 0; 434 } 435 EXPORT_SYMBOL_GPL(wl1273_get_format); 436 437 static int wl1273_probe(struct snd_soc_codec *codec) 438 { 439 struct wl1273_core **core = codec->dev->platform_data; 440 struct wl1273_priv *wl1273; 441 int r; 442 443 dev_dbg(codec->dev, "%s.\n", __func__); 444 445 if (!core) { 446 dev_err(codec->dev, "Platform data is missing.\n"); 447 return -EINVAL; 448 } 449 450 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL); 451 if (wl1273 == NULL) { 452 dev_err(codec->dev, "Cannot allocate memory.\n"); 453 return -ENOMEM; 454 } 455 456 wl1273->mode = WL1273_MODE_BT; 457 wl1273->core = *core; 458 459 snd_soc_codec_set_drvdata(codec, wl1273); 460 mutex_init(&codec->mutex); 461 462 r = snd_soc_add_controls(codec, wl1273_controls, 463 ARRAY_SIZE(wl1273_controls)); 464 if (r) 465 kfree(wl1273); 466 467 return r; 468 } 469 470 static int wl1273_remove(struct snd_soc_codec *codec) 471 { 472 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 473 474 dev_dbg(codec->dev, "%s\n", __func__); 475 kfree(wl1273); 476 477 return 0; 478 } 479 480 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = { 481 .probe = wl1273_probe, 482 .remove = wl1273_remove, 483 }; 484 485 static int __devinit wl1273_platform_probe(struct platform_device *pdev) 486 { 487 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273, 488 &wl1273_dai, 1); 489 } 490 491 static int __devexit wl1273_platform_remove(struct platform_device *pdev) 492 { 493 snd_soc_unregister_codec(&pdev->dev); 494 return 0; 495 } 496 497 MODULE_ALIAS("platform:wl1273-codec"); 498 499 static struct platform_driver wl1273_platform_driver = { 500 .driver = { 501 .name = "wl1273-codec", 502 .owner = THIS_MODULE, 503 }, 504 .probe = wl1273_platform_probe, 505 .remove = __devexit_p(wl1273_platform_remove), 506 }; 507 508 static int __init wl1273_init(void) 509 { 510 return platform_driver_register(&wl1273_platform_driver); 511 } 512 module_init(wl1273_init); 513 514 static void __exit wl1273_exit(void) 515 { 516 platform_driver_unregister(&wl1273_platform_driver); 517 } 518 module_exit(wl1273_exit); 519 520 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); 521 MODULE_DESCRIPTION("ASoC WL1273 codec driver"); 522 MODULE_LICENSE("GPL"); 523