b.liu | e958203 | 2025-04-17 19:18:16 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-only |
| 2 | /* |
| 3 | * ALSA SoC WL1273 codec driver |
| 4 | * |
| 5 | * Author: Matti Aaltonen, <matti.j.aaltonen@nokia.com> |
| 6 | * |
| 7 | * Copyright: (C) 2010, 2011 Nokia Corporation |
| 8 | */ |
| 9 | |
| 10 | #include <linux/mfd/wl1273-core.h> |
| 11 | #include <linux/slab.h> |
| 12 | #include <linux/module.h> |
| 13 | #include <sound/pcm.h> |
| 14 | #include <sound/pcm_params.h> |
| 15 | #include <sound/soc.h> |
| 16 | #include <sound/initval.h> |
| 17 | |
| 18 | #include "wl1273.h" |
| 19 | |
| 20 | enum wl1273_mode { WL1273_MODE_BT, WL1273_MODE_FM_RX, WL1273_MODE_FM_TX }; |
| 21 | |
| 22 | /* codec private data */ |
| 23 | struct wl1273_priv { |
| 24 | enum wl1273_mode mode; |
| 25 | struct wl1273_core *core; |
| 26 | unsigned int channels; |
| 27 | }; |
| 28 | |
| 29 | static int snd_wl1273_fm_set_i2s_mode(struct wl1273_core *core, |
| 30 | int rate, int width) |
| 31 | { |
| 32 | struct device *dev = &core->client->dev; |
| 33 | int r = 0; |
| 34 | u16 mode; |
| 35 | |
| 36 | dev_dbg(dev, "rate: %d\n", rate); |
| 37 | dev_dbg(dev, "width: %d\n", width); |
| 38 | |
| 39 | mutex_lock(&core->lock); |
| 40 | |
| 41 | mode = core->i2s_mode & ~WL1273_IS2_WIDTH & ~WL1273_IS2_RATE; |
| 42 | |
| 43 | switch (rate) { |
| 44 | case 48000: |
| 45 | mode |= WL1273_IS2_RATE_48K; |
| 46 | break; |
| 47 | case 44100: |
| 48 | mode |= WL1273_IS2_RATE_44_1K; |
| 49 | break; |
| 50 | case 32000: |
| 51 | mode |= WL1273_IS2_RATE_32K; |
| 52 | break; |
| 53 | case 22050: |
| 54 | mode |= WL1273_IS2_RATE_22_05K; |
| 55 | break; |
| 56 | case 16000: |
| 57 | mode |= WL1273_IS2_RATE_16K; |
| 58 | break; |
| 59 | case 12000: |
| 60 | mode |= WL1273_IS2_RATE_12K; |
| 61 | break; |
| 62 | case 11025: |
| 63 | mode |= WL1273_IS2_RATE_11_025; |
| 64 | break; |
| 65 | case 8000: |
| 66 | mode |= WL1273_IS2_RATE_8K; |
| 67 | break; |
| 68 | default: |
| 69 | dev_err(dev, "Sampling rate: %d not supported\n", rate); |
| 70 | r = -EINVAL; |
| 71 | goto out; |
| 72 | } |
| 73 | |
| 74 | switch (width) { |
| 75 | case 16: |
| 76 | mode |= WL1273_IS2_WIDTH_32; |
| 77 | break; |
| 78 | case 20: |
| 79 | mode |= WL1273_IS2_WIDTH_40; |
| 80 | break; |
| 81 | case 24: |
| 82 | mode |= WL1273_IS2_WIDTH_48; |
| 83 | break; |
| 84 | case 25: |
| 85 | mode |= WL1273_IS2_WIDTH_50; |
| 86 | break; |
| 87 | case 30: |
| 88 | mode |= WL1273_IS2_WIDTH_60; |
| 89 | break; |
| 90 | case 32: |
| 91 | mode |= WL1273_IS2_WIDTH_64; |
| 92 | break; |
| 93 | case 40: |
| 94 | mode |= WL1273_IS2_WIDTH_80; |
| 95 | break; |
| 96 | case 48: |
| 97 | mode |= WL1273_IS2_WIDTH_96; |
| 98 | break; |
| 99 | case 64: |
| 100 | mode |= WL1273_IS2_WIDTH_128; |
| 101 | break; |
| 102 | default: |
| 103 | dev_err(dev, "Data width: %d not supported\n", width); |
| 104 | r = -EINVAL; |
| 105 | goto out; |
| 106 | } |
| 107 | |
| 108 | dev_dbg(dev, "WL1273_I2S_DEF_MODE: 0x%04x\n", WL1273_I2S_DEF_MODE); |
| 109 | dev_dbg(dev, "core->i2s_mode: 0x%04x\n", core->i2s_mode); |
| 110 | dev_dbg(dev, "mode: 0x%04x\n", mode); |
| 111 | |
| 112 | if (core->i2s_mode != mode) { |
| 113 | r = core->write(core, WL1273_I2S_MODE_CONFIG_SET, mode); |
| 114 | if (r) |
| 115 | goto out; |
| 116 | |
| 117 | core->i2s_mode = mode; |
| 118 | r = core->write(core, WL1273_AUDIO_ENABLE, |
| 119 | WL1273_AUDIO_ENABLE_I2S); |
| 120 | if (r) |
| 121 | goto out; |
| 122 | } |
| 123 | out: |
| 124 | mutex_unlock(&core->lock); |
| 125 | |
| 126 | return r; |
| 127 | } |
| 128 | |
| 129 | static int snd_wl1273_fm_set_channel_number(struct wl1273_core *core, |
| 130 | int channel_number) |
| 131 | { |
| 132 | struct device *dev = &core->client->dev; |
| 133 | int r = 0; |
| 134 | |
| 135 | dev_dbg(dev, "%s\n", __func__); |
| 136 | |
| 137 | mutex_lock(&core->lock); |
| 138 | |
| 139 | if (core->channel_number == channel_number) |
| 140 | goto out; |
| 141 | |
| 142 | if (channel_number == 1 && core->mode == WL1273_MODE_RX) |
| 143 | r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_MONO); |
| 144 | else if (channel_number == 1 && core->mode == WL1273_MODE_TX) |
| 145 | r = core->write(core, WL1273_MONO_SET, WL1273_TX_MONO); |
| 146 | else if (channel_number == 2 && core->mode == WL1273_MODE_RX) |
| 147 | r = core->write(core, WL1273_MOST_MODE_SET, WL1273_RX_STEREO); |
| 148 | else if (channel_number == 2 && core->mode == WL1273_MODE_TX) |
| 149 | r = core->write(core, WL1273_MONO_SET, WL1273_TX_STEREO); |
| 150 | else |
| 151 | r = -EINVAL; |
| 152 | out: |
| 153 | mutex_unlock(&core->lock); |
| 154 | |
| 155 | return r; |
| 156 | } |
| 157 | |
| 158 | static int snd_wl1273_get_audio_route(struct snd_kcontrol *kcontrol, |
| 159 | struct snd_ctl_elem_value *ucontrol) |
| 160 | { |
| 161 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 162 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 163 | |
| 164 | ucontrol->value.enumerated.item[0] = wl1273->mode; |
| 165 | |
| 166 | return 0; |
| 167 | } |
| 168 | |
| 169 | /* |
| 170 | * TODO: Implement the audio routing in the driver. Now this control |
| 171 | * only indicates the setting that has been done elsewhere (in the user |
| 172 | * space). |
| 173 | */ |
| 174 | static const char * const wl1273_audio_route[] = { "Bt", "FmRx", "FmTx" }; |
| 175 | |
| 176 | static int snd_wl1273_set_audio_route(struct snd_kcontrol *kcontrol, |
| 177 | struct snd_ctl_elem_value *ucontrol) |
| 178 | { |
| 179 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 180 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 181 | |
| 182 | if (wl1273->mode == ucontrol->value.enumerated.item[0]) |
| 183 | return 0; |
| 184 | |
| 185 | /* Do not allow changes while stream is running */ |
| 186 | if (snd_soc_component_is_active(component)) |
| 187 | return -EPERM; |
| 188 | |
| 189 | if (ucontrol->value.enumerated.item[0] >= ARRAY_SIZE(wl1273_audio_route)) |
| 190 | return -EINVAL; |
| 191 | |
| 192 | wl1273->mode = ucontrol->value.enumerated.item[0]; |
| 193 | |
| 194 | return 1; |
| 195 | } |
| 196 | |
| 197 | static SOC_ENUM_SINGLE_EXT_DECL(wl1273_enum, wl1273_audio_route); |
| 198 | |
| 199 | static int snd_wl1273_fm_audio_get(struct snd_kcontrol *kcontrol, |
| 200 | struct snd_ctl_elem_value *ucontrol) |
| 201 | { |
| 202 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 203 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 204 | |
| 205 | dev_dbg(component->dev, "%s: enter.\n", __func__); |
| 206 | |
| 207 | ucontrol->value.enumerated.item[0] = wl1273->core->audio_mode; |
| 208 | |
| 209 | return 0; |
| 210 | } |
| 211 | |
| 212 | static int snd_wl1273_fm_audio_put(struct snd_kcontrol *kcontrol, |
| 213 | struct snd_ctl_elem_value *ucontrol) |
| 214 | { |
| 215 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 216 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 217 | int val, r = 0; |
| 218 | |
| 219 | dev_dbg(component->dev, "%s: enter.\n", __func__); |
| 220 | |
| 221 | val = ucontrol->value.enumerated.item[0]; |
| 222 | if (wl1273->core->audio_mode == val) |
| 223 | return 0; |
| 224 | |
| 225 | r = wl1273->core->set_audio(wl1273->core, val); |
| 226 | if (r < 0) |
| 227 | return r; |
| 228 | |
| 229 | return 1; |
| 230 | } |
| 231 | |
| 232 | static const char * const wl1273_audio_strings[] = { "Digital", "Analog" }; |
| 233 | |
| 234 | static SOC_ENUM_SINGLE_EXT_DECL(wl1273_audio_enum, wl1273_audio_strings); |
| 235 | |
| 236 | static int snd_wl1273_fm_volume_get(struct snd_kcontrol *kcontrol, |
| 237 | struct snd_ctl_elem_value *ucontrol) |
| 238 | { |
| 239 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 240 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 241 | |
| 242 | dev_dbg(component->dev, "%s: enter.\n", __func__); |
| 243 | |
| 244 | ucontrol->value.integer.value[0] = wl1273->core->volume; |
| 245 | |
| 246 | return 0; |
| 247 | } |
| 248 | |
| 249 | static int snd_wl1273_fm_volume_put(struct snd_kcontrol *kcontrol, |
| 250 | struct snd_ctl_elem_value *ucontrol) |
| 251 | { |
| 252 | struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol); |
| 253 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 254 | int r; |
| 255 | |
| 256 | dev_dbg(component->dev, "%s: enter.\n", __func__); |
| 257 | |
| 258 | r = wl1273->core->set_volume(wl1273->core, |
| 259 | ucontrol->value.integer.value[0]); |
| 260 | if (r) |
| 261 | return r; |
| 262 | |
| 263 | return 1; |
| 264 | } |
| 265 | |
| 266 | static const struct snd_kcontrol_new wl1273_controls[] = { |
| 267 | SOC_ENUM_EXT("Codec Mode", wl1273_enum, |
| 268 | snd_wl1273_get_audio_route, snd_wl1273_set_audio_route), |
| 269 | SOC_ENUM_EXT("Audio Switch", wl1273_audio_enum, |
| 270 | snd_wl1273_fm_audio_get, snd_wl1273_fm_audio_put), |
| 271 | SOC_SINGLE_EXT("Volume", 0, 0, WL1273_MAX_VOLUME, 0, |
| 272 | snd_wl1273_fm_volume_get, snd_wl1273_fm_volume_put), |
| 273 | }; |
| 274 | |
| 275 | static const struct snd_soc_dapm_widget wl1273_dapm_widgets[] = { |
| 276 | SND_SOC_DAPM_INPUT("RX"), |
| 277 | |
| 278 | SND_SOC_DAPM_OUTPUT("TX"), |
| 279 | }; |
| 280 | |
| 281 | static const struct snd_soc_dapm_route wl1273_dapm_routes[] = { |
| 282 | { "Capture", NULL, "RX" }, |
| 283 | |
| 284 | { "TX", NULL, "Playback" }, |
| 285 | }; |
| 286 | |
| 287 | static int wl1273_startup(struct snd_pcm_substream *substream, |
| 288 | struct snd_soc_dai *dai) |
| 289 | { |
| 290 | struct snd_soc_component *component = dai->component; |
| 291 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 292 | |
| 293 | switch (wl1273->mode) { |
| 294 | case WL1273_MODE_BT: |
| 295 | snd_pcm_hw_constraint_single(substream->runtime, |
| 296 | SNDRV_PCM_HW_PARAM_RATE, 8000); |
| 297 | snd_pcm_hw_constraint_single(substream->runtime, |
| 298 | SNDRV_PCM_HW_PARAM_CHANNELS, 1); |
| 299 | break; |
| 300 | case WL1273_MODE_FM_RX: |
| 301 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 302 | pr_err("Cannot play in RX mode.\n"); |
| 303 | return -EINVAL; |
| 304 | } |
| 305 | break; |
| 306 | case WL1273_MODE_FM_TX: |
| 307 | if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
| 308 | pr_err("Cannot capture in TX mode.\n"); |
| 309 | return -EINVAL; |
| 310 | } |
| 311 | break; |
| 312 | default: |
| 313 | return -EINVAL; |
| 314 | break; |
| 315 | } |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int wl1273_hw_params(struct snd_pcm_substream *substream, |
| 321 | struct snd_pcm_hw_params *params, |
| 322 | struct snd_soc_dai *dai) |
| 323 | { |
| 324 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(dai->component); |
| 325 | struct wl1273_core *core = wl1273->core; |
| 326 | unsigned int rate, width, r; |
| 327 | |
| 328 | if (params_width(params) != 16) { |
| 329 | dev_err(dai->dev, "%d bits/sample not supported\n", |
| 330 | params_width(params)); |
| 331 | return -EINVAL; |
| 332 | } |
| 333 | |
| 334 | rate = params_rate(params); |
| 335 | width = hw_param_interval(params, SNDRV_PCM_HW_PARAM_SAMPLE_BITS)->min; |
| 336 | |
| 337 | if (wl1273->mode == WL1273_MODE_BT) { |
| 338 | if (rate != 8000) { |
| 339 | pr_err("Rate %d not supported.\n", params_rate(params)); |
| 340 | return -EINVAL; |
| 341 | } |
| 342 | |
| 343 | if (params_channels(params) != 1) { |
| 344 | pr_err("Only mono supported.\n"); |
| 345 | return -EINVAL; |
| 346 | } |
| 347 | |
| 348 | return 0; |
| 349 | } |
| 350 | |
| 351 | if (wl1273->mode == WL1273_MODE_FM_TX && |
| 352 | substream->stream == SNDRV_PCM_STREAM_CAPTURE) { |
| 353 | pr_err("Only playback supported with TX.\n"); |
| 354 | return -EINVAL; |
| 355 | } |
| 356 | |
| 357 | if (wl1273->mode == WL1273_MODE_FM_RX && |
| 358 | substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 359 | pr_err("Only capture supported with RX.\n"); |
| 360 | return -EINVAL; |
| 361 | } |
| 362 | |
| 363 | if (wl1273->mode != WL1273_MODE_FM_RX && |
| 364 | wl1273->mode != WL1273_MODE_FM_TX) { |
| 365 | pr_err("Unexpected mode: %d.\n", wl1273->mode); |
| 366 | return -EINVAL; |
| 367 | } |
| 368 | |
| 369 | r = snd_wl1273_fm_set_i2s_mode(core, rate, width); |
| 370 | if (r) |
| 371 | return r; |
| 372 | |
| 373 | wl1273->channels = params_channels(params); |
| 374 | r = snd_wl1273_fm_set_channel_number(core, wl1273->channels); |
| 375 | if (r) |
| 376 | return r; |
| 377 | |
| 378 | return 0; |
| 379 | } |
| 380 | |
| 381 | static const struct snd_soc_dai_ops wl1273_dai_ops = { |
| 382 | .startup = wl1273_startup, |
| 383 | .hw_params = wl1273_hw_params, |
| 384 | }; |
| 385 | |
| 386 | static struct snd_soc_dai_driver wl1273_dai = { |
| 387 | .name = "wl1273-fm", |
| 388 | .playback = { |
| 389 | .stream_name = "Playback", |
| 390 | .channels_min = 1, |
| 391 | .channels_max = 2, |
| 392 | .rates = SNDRV_PCM_RATE_8000_48000, |
| 393 | .formats = SNDRV_PCM_FMTBIT_S16_LE}, |
| 394 | .capture = { |
| 395 | .stream_name = "Capture", |
| 396 | .channels_min = 1, |
| 397 | .channels_max = 2, |
| 398 | .rates = SNDRV_PCM_RATE_8000_48000, |
| 399 | .formats = SNDRV_PCM_FMTBIT_S16_LE}, |
| 400 | .ops = &wl1273_dai_ops, |
| 401 | }; |
| 402 | |
| 403 | /* Audio interface format for the soc_card driver */ |
| 404 | int wl1273_get_format(struct snd_soc_component *component, unsigned int *fmt) |
| 405 | { |
| 406 | struct wl1273_priv *wl1273; |
| 407 | |
| 408 | if (component == NULL || fmt == NULL) |
| 409 | return -EINVAL; |
| 410 | |
| 411 | wl1273 = snd_soc_component_get_drvdata(component); |
| 412 | |
| 413 | switch (wl1273->mode) { |
| 414 | case WL1273_MODE_FM_RX: |
| 415 | case WL1273_MODE_FM_TX: |
| 416 | *fmt = SND_SOC_DAIFMT_I2S | |
| 417 | SND_SOC_DAIFMT_NB_NF | |
| 418 | SND_SOC_DAIFMT_CBM_CFM; |
| 419 | |
| 420 | break; |
| 421 | case WL1273_MODE_BT: |
| 422 | *fmt = SND_SOC_DAIFMT_DSP_A | |
| 423 | SND_SOC_DAIFMT_IB_NF | |
| 424 | SND_SOC_DAIFMT_CBM_CFM; |
| 425 | |
| 426 | break; |
| 427 | default: |
| 428 | return -EINVAL; |
| 429 | } |
| 430 | |
| 431 | return 0; |
| 432 | } |
| 433 | EXPORT_SYMBOL_GPL(wl1273_get_format); |
| 434 | |
| 435 | static int wl1273_probe(struct snd_soc_component *component) |
| 436 | { |
| 437 | struct wl1273_core **core = component->dev->platform_data; |
| 438 | struct wl1273_priv *wl1273; |
| 439 | |
| 440 | dev_dbg(component->dev, "%s.\n", __func__); |
| 441 | |
| 442 | if (!core) { |
| 443 | dev_err(component->dev, "Platform data is missing.\n"); |
| 444 | return -EINVAL; |
| 445 | } |
| 446 | |
| 447 | wl1273 = kzalloc(sizeof(struct wl1273_priv), GFP_KERNEL); |
| 448 | if (!wl1273) |
| 449 | return -ENOMEM; |
| 450 | |
| 451 | wl1273->mode = WL1273_MODE_BT; |
| 452 | wl1273->core = *core; |
| 453 | |
| 454 | snd_soc_component_set_drvdata(component, wl1273); |
| 455 | |
| 456 | return 0; |
| 457 | } |
| 458 | |
| 459 | static void wl1273_remove(struct snd_soc_component *component) |
| 460 | { |
| 461 | struct wl1273_priv *wl1273 = snd_soc_component_get_drvdata(component); |
| 462 | |
| 463 | dev_dbg(component->dev, "%s\n", __func__); |
| 464 | kfree(wl1273); |
| 465 | } |
| 466 | |
| 467 | static const struct snd_soc_component_driver soc_component_dev_wl1273 = { |
| 468 | .probe = wl1273_probe, |
| 469 | .remove = wl1273_remove, |
| 470 | .controls = wl1273_controls, |
| 471 | .num_controls = ARRAY_SIZE(wl1273_controls), |
| 472 | .dapm_widgets = wl1273_dapm_widgets, |
| 473 | .num_dapm_widgets = ARRAY_SIZE(wl1273_dapm_widgets), |
| 474 | .dapm_routes = wl1273_dapm_routes, |
| 475 | .num_dapm_routes = ARRAY_SIZE(wl1273_dapm_routes), |
| 476 | .idle_bias_on = 1, |
| 477 | .use_pmdown_time = 1, |
| 478 | .endianness = 1, |
| 479 | .non_legacy_dai_naming = 1, |
| 480 | }; |
| 481 | |
| 482 | static int wl1273_platform_probe(struct platform_device *pdev) |
| 483 | { |
| 484 | return devm_snd_soc_register_component(&pdev->dev, |
| 485 | &soc_component_dev_wl1273, |
| 486 | &wl1273_dai, 1); |
| 487 | } |
| 488 | |
| 489 | static int wl1273_platform_remove(struct platform_device *pdev) |
| 490 | { |
| 491 | return 0; |
| 492 | } |
| 493 | |
| 494 | MODULE_ALIAS("platform:wl1273-codec"); |
| 495 | |
| 496 | static struct platform_driver wl1273_platform_driver = { |
| 497 | .driver = { |
| 498 | .name = "wl1273-codec", |
| 499 | }, |
| 500 | .probe = wl1273_platform_probe, |
| 501 | .remove = wl1273_platform_remove, |
| 502 | }; |
| 503 | |
| 504 | module_platform_driver(wl1273_platform_driver); |
| 505 | |
| 506 | MODULE_AUTHOR("Matti Aaltonen <matti.j.aaltonen@nokia.com>"); |
| 507 | MODULE_DESCRIPTION("ASoC WL1273 codec driver"); |
| 508 | MODULE_LICENSE("GPL"); |