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_soc_kcontrol_codec(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_soc_kcontrol_codec(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 (snd_soc_codec_is_active(codec)) 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 SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route); 213 214 static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol, 215 struct snd_ctl_elem_value *ucontrol) 216 { 217 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 218 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 219 220 dev_dbg(codec->dev, "%s: enter.\n", __func__); 221 222 ucontrol->value.integer.value[0] = wl1273->core->audio_mode; 223 224 return 0; 225 } 226 227 static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol, 228 struct snd_ctl_elem_value *ucontrol) 229 { 230 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 231 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 232 int val, r = 0; 233 234 dev_dbg(codec->dev, "%s: enter.\n", __func__); 235 236 val = ucontrol->value.integer.value[0]; 237 if (wl1273->core->audio_mode == val) 238 return 0; 239 240 r = wl1273->core->set_audio(wl1273->core, val); 241 if (r < 0) 242 return r; 243 244 return 1; 245 } 246 247 static const char * const wl1273_audio_strings[] = { "Digital", "Analog" }; 248 249 static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings); 250 251 static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol, 252 struct snd_ctl_elem_value *ucontrol) 253 { 254 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 255 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 256 257 dev_dbg(codec->dev, "%s: enter.\n", __func__); 258 259 ucontrol->value.integer.value[0] = wl1273->core->volume; 260 261 return 0; 262 } 263 264 static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol, 265 struct snd_ctl_elem_value *ucontrol) 266 { 267 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 268 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 269 int r; 270 271 dev_dbg(codec->dev, "%s: enter.\n", __func__); 272 273 r = wl1273->core->set_volume(wl1273->core, 274 ucontrol->value.integer.value[0]); 275 if (r) 276 return r; 277 278 return 1; 279 } 280 281 static const struct snd_kcontrol_new wl1273_controls[] = { 282 SOC_ENUM_EXT("Codec Mode", wl1273_enum, 283 snd_wl1273_get_audio_route, snd_wl1273_set_audio_route), 284 SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum, 285 snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put), 286 SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0, 287 snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put), 288 }; 289 290 static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = { 291 SND_SOC_DAPM_INPUT("RX"), 292 293 SND_SOC_DAPM_OUTPUT("TX"), 294 }; 295 296 static const struct snd_soc_dapm_route wl1273_dapm_routes[] = { 297 { "Capture", NULL, "RX" }, 298 299 { "TX", NULL, "Playback" }, 300 }; 301 302 static int wl1273_startup(struct snd_pcm_substream *substream, 303 struct snd_soc_dai *dai) 304 { 305 struct snd_soc_codec *codec = dai->codec; 306 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 307 308 switch (wl1273->mode) { 309 case WL1273_MODE_BT: 310 snd_pcm_hw_constraint_single(substream->runtime, 311 SNDRV_PCM_HW_PARAM_RATE, 8000); 312 snd_pcm_hw_constraint_single(substream->runtime, 313 SNDRV_PCM_HW_PARAM_CHANNELS, 1); 314 break; 315 case WL1273_MODE_FM_RX: 316 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 317 pr_err("Cannot play in RX mode.\n"); 318 return -EINVAL; 319 } 320 break; 321 case WL1273_MODE_FM_TX: 322 if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 323 pr_err("Cannot capture in TX mode.\n"); 324 return -EINVAL; 325 } 326 break; 327 default: 328 return -EINVAL; 329 break; 330 } 331 332 return 0; 333 } 334 335 static int wl1273_hw_params(struct snd_pcm_substream *substream, 336 struct snd_pcm_hw_params *params, 337 struct snd_soc_dai *dai) 338 { 339 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(dai->codec); 340 struct wl1273_core *core = wl1273->core; 341 unsigned int rate, width, r; 342 343 if (params_width(params) != 16) { 344 dev_err(dai->dev, "%d bits/sample not supported\n", 345 params_width(params)); 346 return -EINVAL; 347 } 348 349 rate = params_rate(params); 350 width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min; 351 352 if (wl1273->mode == WL1273_MODE_BT) { 353 if (rate != 8000) { 354 pr_err("Rate %d not supported.\n", params_rate(params)); 355 return -EINVAL; 356 } 357 358 if (params_channels(params) != 1) { 359 pr_err("Only mono supported.\n"); 360 return -EINVAL; 361 } 362 363 return 0; 364 } 365 366 if (wl1273->mode == WL1273_MODE_FM_TX && 367 substream->stream == SNDRV_PCM_STREAM_CAPTURE) { 368 pr_err("Only playback supported with TX.\n"); 369 return -EINVAL; 370 } 371 372 if (wl1273->mode == WL1273_MODE_FM_RX && 373 substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 374 pr_err("Only capture supported with RX.\n"); 375 return -EINVAL; 376 } 377 378 if (wl1273->mode != WL1273_MODE_FM_RX && 379 wl1273->mode != WL1273_MODE_FM_TX) { 380 pr_err("Unexpected mode: %d.\n", wl1273->mode); 381 return -EINVAL; 382 } 383 384 r = snd_wl1273_fm_set_i2s_mode(core, rate, width); 385 if (r) 386 return r; 387 388 wl1273->channels = params_channels(params); 389 r = snd_wl1273_fm_set_channel_number(core, wl1273->channels); 390 if (r) 391 return r; 392 393 return 0; 394 } 395 396 static const struct snd_soc_dai_ops wl1273_dai_ops = { 397 .startup = wl1273_startup, 398 .hw_params = wl1273_hw_params, 399 }; 400 401 static struct snd_soc_dai_driver wl1273_dai = { 402 .name = "wl1273-fm", 403 .playback = { 404 .stream_name = "Playback", 405 .channels_min = 1, 406 .channels_max = 2, 407 .rates = SNDRV_PCM_RATE_8000_48000, 408 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 409 .capture = { 410 .stream_name = "Capture", 411 .channels_min = 1, 412 .channels_max = 2, 413 .rates = SNDRV_PCM_RATE_8000_48000, 414 .formats = SNDRV_PCM_FMTBIT_S16_LE}, 415 .ops = &wl1273_dai_ops, 416 }; 417 418 /* Audio interface format for the soc_card driver */ 419 int wl1273_get_format(struct snd_soc_codec *codec, unsigned int *fmt) 420 { 421 struct wl1273_priv *wl1273; 422 423 if (codec == NULL || fmt == NULL) 424 return -EINVAL; 425 426 wl1273 = snd_soc_codec_get_drvdata(codec); 427 428 switch (wl1273->mode) { 429 case WL1273_MODE_FM_RX: 430 case WL1273_MODE_FM_TX: 431 *fmt = SND_SOC_DAIFMT_I2S | 432 SND_SOC_DAIFMT_NB_NF | 433 SND_SOC_DAIFMT_CBM_CFM; 434 435 break; 436 case WL1273_MODE_BT: 437 *fmt = SND_SOC_DAIFMT_DSP_A | 438 SND_SOC_DAIFMT_IB_NF | 439 SND_SOC_DAIFMT_CBM_CFM; 440 441 break; 442 default: 443 return -EINVAL; 444 } 445 446 return 0; 447 } 448 EXPORT_SYMBOL_GPL(wl1273_get_format); 449 450 static int wl1273_probe(struct snd_soc_codec *codec) 451 { 452 struct wl1273_core **core = codec->dev->platform_data; 453 struct wl1273_priv *wl1273; 454 455 dev_dbg(codec->dev, "%s.\n", __func__); 456 457 if (!core) { 458 dev_err(codec->dev, "Platform data is missing.\n"); 459 return -EINVAL; 460 } 461 462 wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL); 463 if (!wl1273) 464 return -ENOMEM; 465 466 wl1273->mode = WL1273_MODE_BT; 467 wl1273->core = *core; 468 469 snd_soc_codec_set_drvdata(codec, wl1273); 470 471 return 0; 472 } 473 474 static int wl1273_remove(struct snd_soc_codec *codec) 475 { 476 struct wl1273_priv *wl1273 = snd_soc_codec_get_drvdata(codec); 477 478 dev_dbg(codec->dev, "%s\n", __func__); 479 kfree(wl1273); 480 481 return 0; 482 } 483 484 static struct snd_soc_codec_driver soc_codec_dev_wl1273 = { 485 .probe = wl1273_probe, 486 .remove = wl1273_remove, 487 488 .controls = wl1273_controls, 489 .num_controls = ARRAY_SIZE(wl1273_controls), 490 .dapm_widgets = wl1273_dapm_widgets, 491 .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets), 492 .dapm_routes = wl1273_dapm_routes, 493 .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes), 494 }; 495 496 static int wl1273_platform_probe(struct platform_device *pdev) 497 { 498 return snd_soc_register_codec(&pdev->dev, &soc_codec_dev_wl1273, 499 &wl1273_dai, 1); 500 } 501 502 static int wl1273_platform_remove(struct platform_device *pdev) 503 { 504 snd_soc_unregister_codec(&pdev->dev); 505 return 0; 506 } 507 508 MODULE_ALIAS("platform:wl1273-codec"); 509 510 static struct platform_driver wl1273_platform_driver = { 511 .driver = { 512 .name = "wl1273-codec", 513 }, 514 .probe = wl1273_platform_probe, 515 .remove = wl1273_platform_remove, 516 }; 517 518 module_platform_driver(wl1273_platform_driver); 519 520 MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); 521 MODULE_DESCRIPTION("ASoC WL1273 codec driver"); 522 MODULE_LICENSE("GPL"); 523