1 /* 2 * ALSA SoC WL1273 codec driver 3 * 4 * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com> 5 * 6 * Copyright: (C) 2010, 2011 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 <linux/module.h> 27 #include <sound/pcm.h> 28 #include <sound/pcm_params.h> 29 #include <sound/soc.h> 30 #include <sound/initval.h> 31 32 #include "wl1273.h" 33 34 enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX }; 35 36 /* codec private data */ 37 struct wl1273_priv { 38 enum wl1273_mode mode; 39 struct wl1273_core *core; 40 unsigned int channels; 41 }; 42 43 static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core, 44 int rate, int width) 45 { 46 struct device *dev = &core->client->dev; 47 int r = 0; 48 u16 mode; 49 50 dev_dbg(dev, "rate: %d\n", rate); 51 dev_dbg(dev, "width: %d\n", width); 52 53 mutex_lock(&core->lock); 54 55 mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE; 56 57 switch (rate) { 58 case 48000: 59 mode |= WL1273_IS2_RATE_48K; 60 break; 61 case 44100: 62 mode |= WL1273_IS2_RATE_44_1K; 63 break; 64 case 32000: 65 mode |= WL1273_IS2_RATE_32K; 66 break; 67 case 22050: 68 mode |= WL1273_IS2_RATE_22_05K; 69 break; 70 case 16000: 71 mode |= WL1273_IS2_RATE_16K; 72 break; 73 case 12000: 74 mode |= WL1273_IS2_RATE_12K; 75 break; 76 case 11025: 77 mode |= WL1273_IS2_RATE_11_025; 78 break; 79 case 8000: 80 mode |= WL1273_IS2_RATE_8K; 81 break; 82 default: 83 dev_err(dev, "Sampling rate: %d not supported\n", rate); 84 r = -EINVAL; 85 goto out; 86 } 87 88 switch (width) { 89 case 16: 90 mode |= WL1273_IS2_WIDTH_32; 91 break; 92 case 20: 93 mode |= WL1273_IS2_WIDTH_40; 94 break; 95 case 24: 96 mode |= WL1273_IS2_WIDTH_48; 97 break; 98 case 25: 99 mode |= WL1273_IS2_WIDTH_50; 100 break; 101 case 30: 102 mode |= WL1273_IS2_WIDTH_60; 103 break; 104 case 32: 105 mode |= WL1273_IS2_WIDTH_64; 106 break; 107 case 40: 108 mode |= WL1273_IS2_WIDTH_80; 109 break; 110 case 48: 111 mode |= WL1273_IS2_WIDTH_96; 112 break; 113 case 64: 114 mode |= WL1273_IS2_WIDTH_128; 115 break; 116 default: 117 dev_err(dev, "Data width: %d not supported\n", width); 118 r = -EINVAL; 119 goto out; 120 } 121 122 dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE); 123 dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode); 124 dev_dbg(dev, "mode: 0x%04x\n", mode); 125 126 if (core->i2s_mode != mode) { 127 r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode); 128 if (r) 129 goto out; 130 131 core->i2s_mode = mode; 132 r = core->write(core, WL1273_AUDIO_ENABLE, 133 WL1273_AUDIO_ENABLE_I2S); 134 if (r) 135 goto out; 136 } 137 out: 138 mutex_unlock(&core->lock); 139 140 return r; 141 } 142 143 static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core, 144 int channel_number) 145 { 146 struct device *dev = &core->client->dev; 147 int r = 0; 148 149 dev_dbg(dev, "%s\n", __func__); 150 151 mutex_lock(&core->lock); 152 153 if (core->channel_number == channel_number) 154 goto out; 155 156 if (channel_number == 1 && core->mode == WL1273_MODE_RX) 157 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO); 158 else if (channel_number == 1 && core->mode == WL1273_MODE_TX) 159 r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO); 160 else if (channel_number == 2 && core->mode == WL1273_MODE_RX) 161 r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO); 162 else if (channel_number == 2 && core->mode == WL1273_MODE_TX) 163 r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO); 164 else 165 r = -EINVAL; 166 out: 167 mutex_unlock(&core->lock); 168 169 return r; 170 } 171 172 static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol, 173 struct snd_ctl_elem_value *ucontrol) 174 { 175 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 176 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 177 178 ucontrol->value.integer.value[0] = wl1273->mode; 179 180 return 0; 181 } 182 183 /* 184 * TODO: Implement the audio routing in the driver. Now this control 185 * only indicates the setting that has been done elsewhere (in the user 186 * space). 187 */ 188 static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" }; 189 190 static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol, 191 struct snd_ctl_elem_value *ucontrol) 192 { 193 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 194 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 195 196 if (wl1273->mode == ucontrol->value.integer.value[0]) 197 return 0; 198 199 /* Do not allow changes while stream is running */ 200 if (codec->active) 201 return -EPERM; 202 203 if (ucontrol->value.integer.value[0] < 0 || 204 ucontrol->value.integer.value[0] >= ARRAY_SIZE(wl1273_audio_route)) 205 return -EINVAL; 206 207 wl1273->mode = ucontrol->value.integer.value[0]; 208 209 return 1; 210 } 211 212 static const struct soc_enum wl1273_enum = 213 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_route), wl1273_audio_route); 214 215 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol, 216 struct snd_ctl_elem_value *ucontrol) 217 { 218 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 219 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 220 221 dev_dbg(codec->dev, "%s: enter.\n", __func__); 222 223 ucontrol->value.integer.value[0] = wl1273->core->audio_mode; 224 225 return 0; 226 } 227 228 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol, 229 struct snd_ctl_elem_value *ucontrol) 230 { 231 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 232 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 233 int val, r = 0; 234 235 dev_dbg(codec->dev, "%s: enter.\n", __func__); 236 237 val = ucontrol->value.integer.value[0]; 238 if (wl1273->core->audio_mode == val) 239 return 0; 240 241 r = wl1273->core->set_audio(wl1273->core, val); 242 if (r < 0) 243 return r; 244 245 return 1; 246 } 247 248 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" }; 249 250 static const struct soc_enum wl1273_audio_enum = 251 SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(wl1273_audio_strings), 252 wl1273_audio_strings); 253 254 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol, 255 struct snd_ctl_elem_value *ucontrol) 256 { 257 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 258 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 259 260 dev_dbg(codec->dev, "%s: enter.\n", __func__); 261 262 ucontrol->value.integer.value[0] = wl1273->core->volume; 263 264 return 0; 265 } 266 267 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol, 268 struct snd_ctl_elem_value *ucontrol) 269 { 270 struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol); 271 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 272 int r; 273 274 dev_dbg(codec->dev, "%s: enter.\n", __func__); 275 276 r = wl1273->core->set_volume(wl1273->core, 277 ucontrol->value.integer.value[0]); 278 if (r) 279 return r; 280 281 return 1; 282 } 283 284 static const struct snd_kcontrol_new wl1273_controls[] = { 285 SOC_ENUM_EXT("Codec Mode", wl1273_enum, 286 snd_wl1273_get_audio_route, snd_wl1273_set_audio_route), 287 SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum, 288 snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put), 289 SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0, 290 snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put), 291 }; 292 293 static int wl1273_startup(struct snd_pcm_substream *substream, 294 struct snd_soc_dai *dai) 295 { 296 struct snd_soc_codec *codec = dai->codec; 297 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 298 299 switch (wl1273->mode) { 300 case WL1273_MODE_BT: 301 snd_pcm_hw_constraint_minmax(substream->runtime, 302 SNDRV_PCM_HW_PARAM_RATE, 303 8000, 8000); 304 snd_pcm_hw_constraint_minmax(substream->runtime, 305 SNDRV_PCM_HW_PARAM_CHANNELS, 1, 1); 306 break; 307 case WL1273_MODE_FM_RX: 308 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 309 pr_err("Cannot play in RX mode.\n"); 310 return -EINVAL; 311 } 312 break; 313 case WL1273_MODE_FM_TX: 314 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 315 pr_err("Cannot capture in TX mode.\n"); 316 return -EINVAL; 317 } 318 break; 319 default: 320 return -EINVAL; 321 break; 322 } 323 324 return 0; 325 } 326 327 static int wl1273_hw_params(struct snd_pcm_substream *substream, 328 struct snd_pcm_hw_params *params, 329 struct snd_soc_dai *dai) 330 { 331 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec); 332 struct wl1273_core *core = wl1273->core; 333 unsigned int rate, width, r; 334 335 if (params_format(params) != SNDRV_PCM_FORMAT_S16_LE) { 336 pr_err("Only SNDRV_PCM_FORMAT_S16_LE supported.\n"); 337 return -EINVAL; 338 } 339 340 rate = params_rate(params); 341 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min; 342 343 if (wl1273->mode == WL1273_MODE_BT) { 344 if (rate != 8000) { 345 pr_err("Rate %d not supported.\n", params_rate(params)); 346 return -EINVAL; 347 } 348 349 if (params_channels(params) != 1) { 350 pr_err("Only mono supported.\n"); 351 return -EINVAL; 352 } 353 354 return 0; 355 } 356 357 if (wl1273->mode == WL1273_MODE_FM_TX && 358 substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 359 pr_err("Only playback supported with TX.\n"); 360 return -EINVAL; 361 } 362 363 if (wl1273->mode == WL1273_MODE_FM_RX && 364 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 365 pr_err("Only capture supported with RX.\n"); 366 return -EINVAL; 367 } 368 369 if (wl1273->mode != WL1273_MODE_FM_RX && 370 wl1273->mode != WL1273_MODE_FM_TX) { 371 pr_err("Unexpected mode: %d.\n", wl1273->mode); 372 return -EINVAL; 373 } 374 375 r = snd_wl1273_fm_set_i2s_mode(core, rate, width); 376 if (r) 377 return r; 378 379 wl1273->channels = params_channels(params); 380 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels); 381 if (r) 382 return r; 383 384 return 0; 385 } 386 387 static const struct snd_soc_dai_ops wl1273_dai_ops = { 388 .startup = wl1273_startup, 389 .hw_params = wl1273_hw_params, 390 }; 391 392 static struct snd_soc_dai_driver wl1273_dai = { 393 .name = "wl1273-fm", 394 .playback = { 395 .stream_name = "Playback", 396 .channels_min = 1, 397 .channels_max = 2, 398 .rates = SNDRV_PCM_RATE_8000_48000, 399 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 400 .capture = { 401 .stream_name = "Capture", 402 .channels_min = 1, 403 .channels_max = 2, 404 .rates = SNDRV_PCM_RATE_8000_48000, 405 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 406 .ops = &wl1273_dai_ops, 407 }; 408 409 /* Audio interface format for the soc_card driver */ 410 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt) 411 { 412 struct wl1273_priv *wl1273; 413 414 if (codec == NULL || fmt == NULL) 415 return -EINVAL; 416 417 wl1273 = snd_soc_codec_get_drvdata(codec); 418 419 switch (wl1273->mode) { 420 case WL1273_MODE_FM_RX: 421 case WL1273_MODE_FM_TX: 422 *fmt = SND_SOC_DAIFMT_I2S | 423 SND_SOC_DAIFMT_NB_NF | 424 SND_SOC_DAIFMT_CBM_CFM; 425 426 break; 427 case WL1273_MODE_BT: 428 *fmt = SND_SOC_DAIFMT_DSP_A | 429 SND_SOC_DAIFMT_IB_NF | 430 SND_SOC_DAIFMT_CBM_CFM; 431 432 break; 433 default: 434 return -EINVAL; 435 } 436 437 return 0; 438 } 439 EXPORT_SYMBOL_GPL(wl1273_get_format); 440 441 static int wl1273_probe(struct snd_soc_codec *codec) 442 { 443 struct wl1273_core **core = codec->dev->platform_data; 444 struct wl1273_priv *wl1273; 445 int r; 446 447 dev_dbg(codec->dev, "%s.\n", __func__); 448 449 if (!core) { 450 dev_err(codec->dev, "Platform data is missing.\n"); 451 return -EINVAL; 452 } 453 454 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL); 455 if (wl1273 == NULL) { 456 dev_err(codec->dev, "Cannot allocate memory.\n"); 457 return -ENOMEM; 458 } 459 460 wl1273->mode = WL1273_MODE_BT; 461 wl1273->core = *core; 462 463 snd_soc_codec_set_drvdata(codec, wl1273); 464 465 r = snd_soc_add_codec_controls(codec, wl1273_controls, 466 ARRAY_SIZE(wl1273_controls)); 467 if (r) 468 kfree(wl1273); 469 470 return r; 471 } 472 473 static int wl1273_remove(struct snd_soc_codec *codec) 474 { 475 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 476 477 dev_dbg(codec->dev, "%s\n", __func__); 478 kfree(wl1273); 479 480 return 0; 481 } 482 483 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = { 484 .probe = wl1273_probe, 485 .remove = wl1273_remove, 486 }; 487 488 static int wl1273_platform_probe(struct platform_device *pdev) 489 { 490 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273, 491 &wl1273_dai, 1); 492 } 493 494 static int wl1273_platform_remove(struct platform_device *pdev) 495 { 496 snd_soc_unregister_codec(&pdev->dev); 497 return 0; 498 } 499 500 MODULE_ALIAS("platform:wl1273-codec"); 501 502 static struct platform_driver wl1273_platform_driver = { 503 .driver = { 504 .name = "wl1273-codec", 505 .owner = THIS_MODULE, 506 }, 507 .probe = wl1273_platform_probe, 508 .remove = wl1273_platform_remove, 509 }; 510 511 module_platform_driver(wl1273_platform_driver); 512 513 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); 514 MODULE_DESCRIPTION("ASoC WL1273 codec driver"); 515 MODULE_LICENSE("GPL"); 516