1 // SPDX-License-Identifier: GPL-2.0-only 2 // 3 // Driver for Cirrus Logic CS35L56 smart amp 4 // 5 // Copyright (C) 2023 Cirrus Logic, Inc. and 6 // Cirrus Logic International Semiconductor Ltd. 7 8 #include <kunit/static_stub.h> 9 #include <kunit/visibility.h> 10 #include <linux/acpi.h> 11 #include <linux/array_size.h> 12 #include <linux/completion.h> 13 #include <linux/debugfs.h> 14 #include <linux/delay.h> 15 #include <linux/device.h> 16 #include <linux/err.h> 17 #include <linux/gpio/consumer.h> 18 #include <linux/interrupt.h> 19 #include <linux/math.h> 20 #include <linux/module.h> 21 #include <linux/mutex.h> 22 #include <linux/pm.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/property.h> 25 #include <linux/reboot.h> 26 #include <linux/regmap.h> 27 #include <linux/regulator/consumer.h> 28 #include <linux/slab.h> 29 #include <linux/soundwire/sdw.h> 30 #include <linux/types.h> 31 #include <linux/workqueue.h> 32 #include <sound/cs-amp-lib.h> 33 #include <sound/pcm.h> 34 #include <sound/pcm_params.h> 35 #include <sound/soc.h> 36 #include <sound/soc-dapm.h> 37 #include <sound/tlv.h> 38 39 #include "wm_adsp.h" 40 #include "cs35l56.h" 41 42 /* 43 * snd_soc_register_component() can call component_probe() on all instances 44 * in a card, so deferred registration must be protected across all instances. 45 */ 46 static DEFINE_MUTEX(cs35l56_component_register_lock); 47 static bool cs35l56_shutting_down; 48 49 void cs35l56_mask_soundwire_interrupts(struct cs35l56_private *cs35l56) 50 { 51 /* 52 * Mask unconditionally. 53 * 54 * The read of GEN_INT_STAT_1 is required as per the SoundWire spec 55 * for interrupt status bits to clear. 56 * GEN_INT_MASK_1 masks the _inputs_ to GEN_INT_STAT1. 57 */ 58 sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1, 0); 59 sdw_read_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1); 60 sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_STAT_1, 0xFF); 61 } 62 EXPORT_SYMBOL_NS_GPL(cs35l56_mask_soundwire_interrupts, "SND_SOC_CS35L56_CORE"); 63 64 void cs35l56_unmask_soundwire_interrupts(struct cs35l56_private *cs35l56) 65 { 66 if (!cs35l56->base.irq) 67 return; 68 69 sdw_write_no_pm(cs35l56->sdw_peripheral, CS35L56_SDW_GEN_INT_MASK_1, 70 CS35L56_SDW_INT_MASK_CODEC_IRQ); 71 } 72 EXPORT_SYMBOL_NS_GPL(cs35l56_unmask_soundwire_interrupts, "SND_SOC_CS35L56_CORE"); 73 74 static void cs35l56_disable_sdw_interrupts(struct cs35l56_private *cs35l56) 75 { 76 if (!cs35l56->sdw_peripheral) 77 return; 78 79 cs35l56_mask_soundwire_interrupts(cs35l56); 80 if (cs35l56->base.irq) 81 disable_irq(cs35l56->base.irq); 82 } 83 84 static void cs35l56_enable_sdw_interrupts(struct cs35l56_private *cs35l56) 85 { 86 if (!cs35l56->sdw_peripheral || !cs35l56->base.irq) 87 return; 88 89 enable_irq(cs35l56->base.irq); 90 cs35l56_unmask_soundwire_interrupts(cs35l56); 91 } 92 93 static int cs35l56_dsp_event(struct snd_soc_dapm_widget *w, 94 struct snd_kcontrol *kcontrol, int event); 95 96 static void cs35l56_wait_dsp_ready(struct cs35l56_private *cs35l56) 97 { 98 /* Wait for patching to complete */ 99 flush_work(&cs35l56->dsp_work); 100 } 101 102 static int cs35l56_dspwait_get_volsw(struct snd_kcontrol *kcontrol, 103 struct snd_ctl_elem_value *ucontrol) 104 { 105 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 106 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 107 108 cs35l56_wait_dsp_ready(cs35l56); 109 return snd_soc_get_volsw(kcontrol, ucontrol); 110 } 111 112 static int cs35l56_dspwait_put_volsw(struct snd_kcontrol *kcontrol, 113 struct snd_ctl_elem_value *ucontrol) 114 { 115 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 116 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 117 118 cs35l56_wait_dsp_ready(cs35l56); 119 return snd_soc_put_volsw(kcontrol, ucontrol); 120 } 121 122 static DECLARE_TLV_DB_SCALE(vol_tlv, -10000, 25, 0); 123 124 static SOC_ENUM_SINGLE_DECL(cs35l56_cal_set_status_enum, SND_SOC_NOPM, 0, 125 cs35l56_cal_set_status_text); 126 127 static int cs35l56_cal_set_status_ctl_get(struct snd_kcontrol *kcontrol, 128 struct snd_ctl_elem_value *ucontrol) 129 { 130 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 131 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 132 133 return cs35l56_cal_set_status_get(&cs35l56->base, ucontrol); 134 } 135 136 static const struct snd_kcontrol_new cs35l56_controls[] = { 137 SOC_SINGLE_EXT("Speaker Switch", 138 CS35L56_MAIN_RENDER_USER_MUTE, 0, 1, 1, 139 cs35l56_dspwait_get_volsw, cs35l56_dspwait_put_volsw), 140 SOC_SINGLE_S_EXT_TLV("Speaker Volume", 141 CS35L56_MAIN_RENDER_USER_VOLUME, 142 CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT, 143 CS35L56_MAIN_RENDER_USER_VOLUME_MIN, 144 CS35L56_MAIN_RENDER_USER_VOLUME_MAX, 145 CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT, 146 0, 147 cs35l56_dspwait_get_volsw, 148 cs35l56_dspwait_put_volsw, 149 vol_tlv), 150 SOC_SINGLE_EXT("Posture Number", CS35L56_MAIN_POSTURE_NUMBER, 151 0, 255, 0, 152 cs35l56_dspwait_get_volsw, cs35l56_dspwait_put_volsw), 153 SOC_ENUM_EXT_ACC("CAL_SET_STATUS", cs35l56_cal_set_status_enum, 154 cs35l56_cal_set_status_ctl_get, NULL, 155 SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE), 156 }; 157 158 static const struct snd_kcontrol_new cs35l63_controls[] = { 159 SOC_SINGLE_EXT("Speaker Switch", 160 CS35L63_MAIN_RENDER_USER_MUTE, 0, 1, 1, 161 cs35l56_dspwait_get_volsw, cs35l56_dspwait_put_volsw), 162 SOC_SINGLE_S_EXT_TLV("Speaker Volume", 163 CS35L63_MAIN_RENDER_USER_VOLUME, 164 CS35L56_MAIN_RENDER_USER_VOLUME_SHIFT, 165 CS35L56_MAIN_RENDER_USER_VOLUME_MIN, 166 CS35L56_MAIN_RENDER_USER_VOLUME_MAX, 167 CS35L56_MAIN_RENDER_USER_VOLUME_SIGNBIT, 168 0, 169 cs35l56_dspwait_get_volsw, 170 cs35l56_dspwait_put_volsw, 171 vol_tlv), 172 SOC_SINGLE_EXT("Posture Number", CS35L63_MAIN_POSTURE_NUMBER, 173 0, 255, 0, 174 cs35l56_dspwait_get_volsw, cs35l56_dspwait_put_volsw), 175 SOC_ENUM_EXT_ACC("CAL_SET_STATUS", cs35l56_cal_set_status_enum, 176 cs35l56_cal_set_status_ctl_get, NULL, 177 SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE), 178 }; 179 180 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_asp1tx1_enum, 181 CS35L56_ASP1TX1_INPUT, 182 0, CS35L56_ASP_TXn_SRC_MASK, 183 cs35l56_tx_input_texts, 184 cs35l56_tx_input_values); 185 186 static const struct snd_kcontrol_new asp1_tx1_mux = 187 SOC_DAPM_ENUM("ASP1TX1 SRC", cs35l56_asp1tx1_enum); 188 189 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_asp1tx2_enum, 190 CS35L56_ASP1TX2_INPUT, 191 0, CS35L56_ASP_TXn_SRC_MASK, 192 cs35l56_tx_input_texts, 193 cs35l56_tx_input_values); 194 195 static const struct snd_kcontrol_new asp1_tx2_mux = 196 SOC_DAPM_ENUM("ASP1TX2 SRC", cs35l56_asp1tx2_enum); 197 198 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_asp1tx3_enum, 199 CS35L56_ASP1TX3_INPUT, 200 0, CS35L56_ASP_TXn_SRC_MASK, 201 cs35l56_tx_input_texts, 202 cs35l56_tx_input_values); 203 204 static const struct snd_kcontrol_new asp1_tx3_mux = 205 SOC_DAPM_ENUM("ASP1TX3 SRC", cs35l56_asp1tx3_enum); 206 207 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_asp1tx4_enum, 208 CS35L56_ASP1TX4_INPUT, 209 0, CS35L56_ASP_TXn_SRC_MASK, 210 cs35l56_tx_input_texts, 211 cs35l56_tx_input_values); 212 213 static const struct snd_kcontrol_new asp1_tx4_mux = 214 SOC_DAPM_ENUM("ASP1TX4 SRC", cs35l56_asp1tx4_enum); 215 216 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_sdw1tx1_enum, 217 CS35L56_SWIRE_DP3_CH1_INPUT, 218 0, CS35L56_SWIRETXn_SRC_MASK, 219 cs35l56_tx_input_texts, 220 cs35l56_tx_input_values); 221 222 static const struct snd_kcontrol_new sdw1_tx1_mux = 223 SOC_DAPM_ENUM("SDW1TX1 SRC", cs35l56_sdw1tx1_enum); 224 225 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_sdw1tx2_enum, 226 CS35L56_SWIRE_DP3_CH2_INPUT, 227 0, CS35L56_SWIRETXn_SRC_MASK, 228 cs35l56_tx_input_texts, 229 cs35l56_tx_input_values); 230 231 static const struct snd_kcontrol_new sdw1_tx2_mux = 232 SOC_DAPM_ENUM("SDW1TX2 SRC", cs35l56_sdw1tx2_enum); 233 234 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_sdw1tx3_enum, 235 CS35L56_SWIRE_DP3_CH3_INPUT, 236 0, CS35L56_SWIRETXn_SRC_MASK, 237 cs35l56_tx_input_texts, 238 cs35l56_tx_input_values); 239 240 static const struct snd_kcontrol_new sdw1_tx3_mux = 241 SOC_DAPM_ENUM("SDW1TX3 SRC", cs35l56_sdw1tx3_enum); 242 243 static SOC_VALUE_ENUM_SINGLE_DECL(cs35l56_sdw1tx4_enum, 244 CS35L56_SWIRE_DP3_CH4_INPUT, 245 0, CS35L56_SWIRETXn_SRC_MASK, 246 cs35l56_tx_input_texts, 247 cs35l56_tx_input_values); 248 249 static const struct snd_kcontrol_new sdw1_tx4_mux = 250 SOC_DAPM_ENUM("SDW1TX4 SRC", cs35l56_sdw1tx4_enum); 251 252 static int cs35l56_play_event(struct snd_soc_dapm_widget *w, 253 struct snd_kcontrol *kcontrol, int event) 254 { 255 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 256 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 257 unsigned int val; 258 int ret; 259 260 dev_dbg(cs35l56->base.dev, "play: %d\n", event); 261 262 switch (event) { 263 case SND_SOC_DAPM_PRE_PMU: 264 /* Don't wait for ACK, we check in POST_PMU that it completed */ 265 return regmap_write(cs35l56->base.regmap, CS35L56_DSP_VIRTUAL1_MBOX_1, 266 CS35L56_MBOX_CMD_AUDIO_PLAY); 267 case SND_SOC_DAPM_POST_PMU: 268 /* Wait for firmware to enter PS0 power state */ 269 ret = regmap_read_poll_timeout(cs35l56->base.regmap, 270 cs35l56->base.fw_reg->transducer_actual_ps, 271 val, (val == CS35L56_PS0), 272 CS35L56_PS0_POLL_US, 273 CS35L56_PS0_TIMEOUT_US); 274 if (ret) 275 dev_err(cs35l56->base.dev, "PS0 wait failed: %d\n", ret); 276 return ret; 277 case SND_SOC_DAPM_POST_PMD: 278 return cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_PAUSE); 279 default: 280 return 0; 281 } 282 } 283 284 static const struct snd_soc_dapm_widget cs35l56_dapm_widgets[] = { 285 SND_SOC_DAPM_REGULATOR_SUPPLY("VDD_B", 0, 0), 286 SND_SOC_DAPM_REGULATOR_SUPPLY("VDD_AMP", 0, 0), 287 288 SND_SOC_DAPM_SUPPLY("PLAY", SND_SOC_NOPM, 0, 0, cs35l56_play_event, 289 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), 290 291 SND_SOC_DAPM_OUT_DRV("AMP", SND_SOC_NOPM, 0, 0, NULL, 0), 292 SND_SOC_DAPM_OUTPUT("SPK"), 293 294 SND_SOC_DAPM_PGA_E("DSP1", SND_SOC_NOPM, 0, 0, NULL, 0, cs35l56_dsp_event, 295 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), 296 297 SND_SOC_DAPM_AIF_IN("ASP1RX1", NULL, 0, CS35L56_ASP1_ENABLES1, 298 CS35L56_ASP_RX1_EN_SHIFT, 0), 299 SND_SOC_DAPM_AIF_IN("ASP1RX2", NULL, 1, CS35L56_ASP1_ENABLES1, 300 CS35L56_ASP_RX2_EN_SHIFT, 0), 301 SND_SOC_DAPM_AIF_OUT("ASP1TX1", NULL, 0, CS35L56_ASP1_ENABLES1, 302 CS35L56_ASP_TX1_EN_SHIFT, 0), 303 SND_SOC_DAPM_AIF_OUT("ASP1TX2", NULL, 1, CS35L56_ASP1_ENABLES1, 304 CS35L56_ASP_TX2_EN_SHIFT, 0), 305 SND_SOC_DAPM_AIF_OUT("ASP1TX3", NULL, 2, CS35L56_ASP1_ENABLES1, 306 CS35L56_ASP_TX3_EN_SHIFT, 0), 307 SND_SOC_DAPM_AIF_OUT("ASP1TX4", NULL, 3, CS35L56_ASP1_ENABLES1, 308 CS35L56_ASP_TX4_EN_SHIFT, 0), 309 310 SND_SOC_DAPM_MUX("ASP1 TX1 Source", SND_SOC_NOPM, 0, 0, &asp1_tx1_mux), 311 SND_SOC_DAPM_MUX("ASP1 TX2 Source", SND_SOC_NOPM, 0, 0, &asp1_tx2_mux), 312 SND_SOC_DAPM_MUX("ASP1 TX3 Source", SND_SOC_NOPM, 0, 0, &asp1_tx3_mux), 313 SND_SOC_DAPM_MUX("ASP1 TX4 Source", SND_SOC_NOPM, 0, 0, &asp1_tx4_mux), 314 315 SND_SOC_DAPM_MUX("SDW1 TX1 Source", SND_SOC_NOPM, 0, 0, &sdw1_tx1_mux), 316 SND_SOC_DAPM_MUX("SDW1 TX2 Source", SND_SOC_NOPM, 0, 0, &sdw1_tx2_mux), 317 SND_SOC_DAPM_MUX("SDW1 TX3 Source", SND_SOC_NOPM, 0, 0, &sdw1_tx3_mux), 318 SND_SOC_DAPM_MUX("SDW1 TX4 Source", SND_SOC_NOPM, 0, 0, &sdw1_tx4_mux), 319 320 SND_SOC_DAPM_SIGGEN("VMON ADC"), 321 SND_SOC_DAPM_SIGGEN("IMON ADC"), 322 SND_SOC_DAPM_SIGGEN("ERRVOL ADC"), 323 SND_SOC_DAPM_SIGGEN("CLASSH ADC"), 324 SND_SOC_DAPM_SIGGEN("VDDBMON ADC"), 325 SND_SOC_DAPM_SIGGEN("VBSTMON ADC"), 326 SND_SOC_DAPM_SIGGEN("TEMPMON ADC"), 327 328 SND_SOC_DAPM_INPUT("Calibrate"), 329 }; 330 331 #define CS35L56_SRC_ROUTE(name) \ 332 { name" Source", "ASP1RX1", "ASP1RX1" }, \ 333 { name" Source", "ASP1RX2", "ASP1RX2" }, \ 334 { name" Source", "VMON", "VMON ADC" }, \ 335 { name" Source", "IMON", "IMON ADC" }, \ 336 { name" Source", "ERRVOL", "ERRVOL ADC" }, \ 337 { name" Source", "CLASSH", "CLASSH ADC" }, \ 338 { name" Source", "VDDBMON", "VDDBMON ADC" }, \ 339 { name" Source", "VBSTMON", "VBSTMON ADC" }, \ 340 { name" Source", "DSP1TX1", "DSP1" }, \ 341 { name" Source", "DSP1TX2", "DSP1" }, \ 342 { name" Source", "DSP1TX3", "DSP1" }, \ 343 { name" Source", "DSP1TX4", "DSP1" }, \ 344 { name" Source", "DSP1TX5", "DSP1" }, \ 345 { name" Source", "DSP1TX6", "DSP1" }, \ 346 { name" Source", "DSP1TX7", "DSP1" }, \ 347 { name" Source", "DSP1TX8", "DSP1" }, \ 348 { name" Source", "TEMPMON", "TEMPMON ADC" }, \ 349 { name" Source", "INTERPOLATOR", "AMP" }, \ 350 { name" Source", "SDW1RX1", "SDW1 Playback" }, \ 351 { name" Source", "SDW1RX2", "SDW1 Playback" }, 352 353 static const struct snd_soc_dapm_route cs35l56_audio_map[] = { 354 { "AMP", NULL, "VDD_B" }, 355 { "AMP", NULL, "VDD_AMP" }, 356 357 { "ASP1 Playback", NULL, "PLAY" }, 358 { "SDW1 Playback", NULL, "PLAY" }, 359 360 { "ASP1RX1", NULL, "ASP1 Playback" }, 361 { "ASP1RX2", NULL, "ASP1 Playback" }, 362 { "DSP1", NULL, "ASP1RX1" }, 363 { "DSP1", NULL, "ASP1RX2" }, 364 { "DSP1", NULL, "SDW1 Playback" }, 365 { "DSP1", NULL, "Calibrate" }, 366 { "AMP", NULL, "DSP1" }, 367 { "SPK", NULL, "AMP" }, 368 369 CS35L56_SRC_ROUTE("ASP1 TX1") 370 CS35L56_SRC_ROUTE("ASP1 TX2") 371 CS35L56_SRC_ROUTE("ASP1 TX3") 372 CS35L56_SRC_ROUTE("ASP1 TX4") 373 374 { "ASP1TX1", NULL, "ASP1 TX1 Source" }, 375 { "ASP1TX2", NULL, "ASP1 TX2 Source" }, 376 { "ASP1TX3", NULL, "ASP1 TX3 Source" }, 377 { "ASP1TX4", NULL, "ASP1 TX4 Source" }, 378 { "ASP1 Capture", NULL, "ASP1TX1" }, 379 { "ASP1 Capture", NULL, "ASP1TX2" }, 380 { "ASP1 Capture", NULL, "ASP1TX3" }, 381 { "ASP1 Capture", NULL, "ASP1TX4" }, 382 383 CS35L56_SRC_ROUTE("SDW1 TX1") 384 CS35L56_SRC_ROUTE("SDW1 TX2") 385 CS35L56_SRC_ROUTE("SDW1 TX3") 386 CS35L56_SRC_ROUTE("SDW1 TX4") 387 { "SDW1 Capture", NULL, "SDW1 TX1 Source" }, 388 { "SDW1 Capture", NULL, "SDW1 TX2 Source" }, 389 { "SDW1 Capture", NULL, "SDW1 TX3 Source" }, 390 { "SDW1 Capture", NULL, "SDW1 TX4 Source" }, 391 }; 392 393 static int cs35l56_dsp_event(struct snd_soc_dapm_widget *w, 394 struct snd_kcontrol *kcontrol, int event) 395 { 396 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 397 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 398 399 dev_dbg(cs35l56->base.dev, "%s: %d\n", __func__, event); 400 401 return wm_adsp_event(w, kcontrol, event); 402 } 403 404 static int cs35l56_asp_dai_probe(struct snd_soc_dai *codec_dai) 405 { 406 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(codec_dai->component); 407 408 return cs35l56_set_asp_patch(&cs35l56->base); 409 } 410 411 static int cs35l56_asp_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 412 { 413 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(codec_dai->component); 414 unsigned int val; 415 416 dev_dbg(cs35l56->base.dev, "%s: %#x\n", __func__, fmt); 417 418 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 419 case SND_SOC_DAIFMT_CBC_CFC: 420 break; 421 default: 422 dev_err(cs35l56->base.dev, "Unsupported clock source mode\n"); 423 return -EINVAL; 424 } 425 426 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 427 case SND_SOC_DAIFMT_DSP_A: 428 val = CS35L56_ASP_FMT_DSP_A << CS35L56_ASP_FMT_SHIFT; 429 cs35l56->tdm_mode = true; 430 break; 431 case SND_SOC_DAIFMT_I2S: 432 val = CS35L56_ASP_FMT_I2S << CS35L56_ASP_FMT_SHIFT; 433 cs35l56->tdm_mode = false; 434 break; 435 default: 436 dev_err(cs35l56->base.dev, "Unsupported DAI format\n"); 437 return -EINVAL; 438 } 439 440 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 441 case SND_SOC_DAIFMT_NB_IF: 442 val |= CS35L56_ASP_FSYNC_INV_MASK; 443 break; 444 case SND_SOC_DAIFMT_IB_NF: 445 val |= CS35L56_ASP_BCLK_INV_MASK; 446 break; 447 case SND_SOC_DAIFMT_IB_IF: 448 val |= CS35L56_ASP_BCLK_INV_MASK | CS35L56_ASP_FSYNC_INV_MASK; 449 break; 450 case SND_SOC_DAIFMT_NB_NF: 451 break; 452 default: 453 dev_err(cs35l56->base.dev, "Invalid clock invert\n"); 454 return -EINVAL; 455 } 456 457 regmap_update_bits(cs35l56->base.regmap, 458 CS35L56_ASP1_CONTROL2, 459 CS35L56_ASP_FMT_MASK | 460 CS35L56_ASP_BCLK_INV_MASK | CS35L56_ASP_FSYNC_INV_MASK, 461 val); 462 463 /* Hi-Z DOUT in unused slots and when all TX are disabled */ 464 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL3, 465 CS35L56_ASP1_DOUT_HIZ_CTRL_MASK, 466 CS35L56_ASP_UNUSED_HIZ_OFF_HIZ); 467 468 return 0; 469 } 470 471 static unsigned int cs35l56_make_tdm_config_word(unsigned int reg_val, unsigned long mask) 472 { 473 unsigned int channel_shift; 474 int bit_num; 475 476 /* Enable consecutive TX1..TXn for each of the slots set in mask */ 477 channel_shift = 0; 478 for_each_set_bit(bit_num, &mask, 32) { 479 reg_val &= ~(0x3f << channel_shift); 480 reg_val |= bit_num << channel_shift; 481 channel_shift += 8; 482 if (channel_shift > 24) 483 break; 484 } 485 486 return reg_val; 487 } 488 489 static int cs35l56_asp_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 490 unsigned int rx_mask, int slots, int slot_width) 491 { 492 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 493 494 if ((slots == 0) || (slot_width == 0)) { 495 dev_dbg(cs35l56->base.dev, "tdm config cleared\n"); 496 cs35l56->asp_slot_width = 0; 497 cs35l56->asp_slot_count = 0; 498 return 0; 499 } 500 501 if (slot_width > (CS35L56_ASP_RX_WIDTH_MASK >> CS35L56_ASP_RX_WIDTH_SHIFT)) { 502 dev_err(cs35l56->base.dev, "tdm invalid slot width %d\n", slot_width); 503 return -EINVAL; 504 } 505 506 /* More than 32 slots would give an unsupportable BCLK frequency */ 507 if (slots > 32) { 508 dev_err(cs35l56->base.dev, "tdm invalid slot count %d\n", slots); 509 return -EINVAL; 510 } 511 512 cs35l56->asp_slot_width = (u8)slot_width; 513 cs35l56->asp_slot_count = (u8)slots; 514 515 // Note: rx/tx is from point of view of the CPU end 516 if (tx_mask == 0) 517 tx_mask = 0x3; // ASPRX1/RX2 in slots 0 and 1 518 519 if (rx_mask == 0) 520 rx_mask = 0xf; // ASPTX1..TX4 in slots 0..3 521 522 /* Default unused slots to 63 */ 523 regmap_write(cs35l56->base.regmap, CS35L56_ASP1_FRAME_CONTROL1, 524 cs35l56_make_tdm_config_word(0x3f3f3f3f, rx_mask)); 525 regmap_write(cs35l56->base.regmap, CS35L56_ASP1_FRAME_CONTROL5, 526 cs35l56_make_tdm_config_word(0x3f3f3f, tx_mask)); 527 528 dev_dbg(cs35l56->base.dev, "tdm slot width: %u count: %u tx_mask: %#x rx_mask: %#x\n", 529 cs35l56->asp_slot_width, cs35l56->asp_slot_count, tx_mask, rx_mask); 530 531 return 0; 532 } 533 534 static int cs35l56_asp_dai_hw_params(struct snd_pcm_substream *substream, 535 struct snd_pcm_hw_params *params, 536 struct snd_soc_dai *dai) 537 { 538 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 539 unsigned int rate = params_rate(params); 540 u8 asp_width, asp_wl; 541 542 asp_wl = params_width(params); 543 if (cs35l56->asp_slot_width) 544 asp_width = cs35l56->asp_slot_width; 545 else 546 asp_width = asp_wl; 547 548 dev_dbg(cs35l56->base.dev, "%s: wl=%d, width=%d, rate=%d", 549 __func__, asp_wl, asp_width, rate); 550 551 if (!cs35l56->sysclk_set) { 552 unsigned int slots = cs35l56->asp_slot_count; 553 unsigned int bclk_freq; 554 int freq_id; 555 556 if (slots == 0) { 557 slots = params_channels(params); 558 559 /* I2S always has an even number of slots */ 560 if (!cs35l56->tdm_mode) 561 slots = round_up(slots, 2); 562 } 563 564 bclk_freq = asp_width * slots * rate; 565 freq_id = cs35l56_get_bclk_freq_id(bclk_freq); 566 if (freq_id < 0) { 567 dev_err(cs35l56->base.dev, "%s: Invalid BCLK %u\n", __func__, bclk_freq); 568 return -EINVAL; 569 } 570 571 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL1, 572 CS35L56_ASP_BCLK_FREQ_MASK, 573 freq_id << CS35L56_ASP_BCLK_FREQ_SHIFT); 574 } 575 576 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 577 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL2, 578 CS35L56_ASP_RX_WIDTH_MASK, asp_width << 579 CS35L56_ASP_RX_WIDTH_SHIFT); 580 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_DATA_CONTROL5, 581 CS35L56_ASP_RX_WL_MASK, asp_wl); 582 } else { 583 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL2, 584 CS35L56_ASP_TX_WIDTH_MASK, asp_width << 585 CS35L56_ASP_TX_WIDTH_SHIFT); 586 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_DATA_CONTROL1, 587 CS35L56_ASP_TX_WL_MASK, asp_wl); 588 } 589 590 return 0; 591 } 592 593 static int cs35l56_asp_dai_set_sysclk(struct snd_soc_dai *dai, 594 int clk_id, unsigned int freq, int dir) 595 { 596 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 597 int freq_id; 598 599 if (freq == 0) { 600 cs35l56->sysclk_set = false; 601 return 0; 602 } 603 604 freq_id = cs35l56_get_bclk_freq_id(freq); 605 if (freq_id < 0) 606 return freq_id; 607 608 regmap_update_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL1, 609 CS35L56_ASP_BCLK_FREQ_MASK, 610 freq_id << CS35L56_ASP_BCLK_FREQ_SHIFT); 611 cs35l56->sysclk_set = true; 612 613 return 0; 614 } 615 616 static const struct snd_soc_dai_ops cs35l56_ops = { 617 .probe = cs35l56_asp_dai_probe, 618 .set_fmt = cs35l56_asp_dai_set_fmt, 619 .set_tdm_slot = cs35l56_asp_dai_set_tdm_slot, 620 .hw_params = cs35l56_asp_dai_hw_params, 621 .set_sysclk = cs35l56_asp_dai_set_sysclk, 622 }; 623 624 static void cs35l56_sdw_dai_shutdown(struct snd_pcm_substream *substream, 625 struct snd_soc_dai *dai) 626 { 627 snd_soc_dai_set_dma_data(dai, substream, NULL); 628 } 629 630 static int cs35l56_sdw_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask, 631 unsigned int rx_mask, int slots, int slot_width) 632 { 633 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 634 635 /* rx/tx are from point of view of the CPU end so opposite to our rx/tx */ 636 cs35l56->rx_mask = tx_mask; 637 cs35l56->tx_mask = rx_mask; 638 639 return 0; 640 } 641 642 static int cs35l56_sdw_dai_hw_params(struct snd_pcm_substream *substream, 643 struct snd_pcm_hw_params *params, 644 struct snd_soc_dai *dai) 645 { 646 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 647 struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream); 648 struct sdw_stream_config sconfig; 649 struct sdw_port_config pconfig; 650 int ret; 651 652 dev_dbg(cs35l56->base.dev, "%s: rate %d\n", __func__, params_rate(params)); 653 654 if (!cs35l56->base.init_done) 655 return -ENODEV; 656 657 if (!sdw_stream) 658 return -EINVAL; 659 660 memset(&sconfig, 0, sizeof(sconfig)); 661 memset(&pconfig, 0, sizeof(pconfig)); 662 663 sconfig.frame_rate = params_rate(params); 664 sconfig.bps = snd_pcm_format_width(params_format(params)); 665 666 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 667 sconfig.direction = SDW_DATA_DIR_RX; 668 pconfig.num = CS35L56_SDW1_PLAYBACK_PORT; 669 pconfig.ch_mask = cs35l56->rx_mask; 670 } else { 671 sconfig.direction = SDW_DATA_DIR_TX; 672 pconfig.num = CS35L56_SDW1_CAPTURE_PORT; 673 pconfig.ch_mask = cs35l56->tx_mask; 674 } 675 676 if (pconfig.ch_mask == 0) { 677 sconfig.ch_count = params_channels(params); 678 pconfig.ch_mask = GENMASK(sconfig.ch_count - 1, 0); 679 } else { 680 sconfig.ch_count = hweight32(pconfig.ch_mask); 681 } 682 683 ret = sdw_stream_add_slave(cs35l56->sdw_peripheral, &sconfig, &pconfig, 684 1, sdw_stream); 685 if (ret) { 686 dev_err(dai->dev, "Failed to add sdw stream: %d\n", ret); 687 return ret; 688 } 689 690 return 0; 691 } 692 693 static int cs35l56_sdw_dai_hw_free(struct snd_pcm_substream *substream, 694 struct snd_soc_dai *dai) 695 { 696 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(dai->component); 697 struct sdw_stream_runtime *sdw_stream = snd_soc_dai_get_dma_data(dai, substream); 698 699 if (!cs35l56->sdw_peripheral) 700 return -EINVAL; 701 702 sdw_stream_remove_slave(cs35l56->sdw_peripheral, sdw_stream); 703 704 return 0; 705 } 706 707 static int cs35l56_sdw_dai_set_stream(struct snd_soc_dai *dai, 708 void *sdw_stream, int direction) 709 { 710 snd_soc_dai_dma_data_set(dai, direction, sdw_stream); 711 712 return 0; 713 } 714 715 static const struct snd_soc_dai_ops cs35l56_sdw_dai_ops = { 716 .set_tdm_slot = cs35l56_sdw_dai_set_tdm_slot, 717 .shutdown = cs35l56_sdw_dai_shutdown, 718 .hw_params = cs35l56_sdw_dai_hw_params, 719 .hw_free = cs35l56_sdw_dai_hw_free, 720 .set_stream = cs35l56_sdw_dai_set_stream, 721 }; 722 723 static struct snd_soc_dai_driver cs35l56_dai[] = { 724 { 725 .name = "cs35l56-asp1", 726 .id = 0, 727 .playback = { 728 .stream_name = "ASP1 Playback", 729 .channels_min = 1, 730 .channels_max = 2, 731 .rates = CS35L56_RATES, 732 .formats = CS35L56_RX_FORMATS, 733 }, 734 .capture = { 735 .stream_name = "ASP1 Capture", 736 .channels_min = 1, 737 .channels_max = 4, 738 .rates = CS35L56_RATES, 739 .formats = CS35L56_TX_FORMATS, 740 }, 741 .ops = &cs35l56_ops, 742 .symmetric_rate = 1, 743 .symmetric_sample_bits = 1, 744 }, 745 { 746 .name = "cs35l56-sdw1", 747 .id = 1, 748 .playback = { 749 .stream_name = "SDW1 Playback", 750 .channels_min = 1, 751 .channels_max = 2, 752 .rates = CS35L56_RATES, 753 .formats = CS35L56_RX_FORMATS, 754 }, 755 .symmetric_rate = 1, 756 .ops = &cs35l56_sdw_dai_ops, 757 }, 758 { 759 .name = "cs35l56-sdw1c", 760 .id = 2, 761 .capture = { 762 .stream_name = "SDW1 Capture", 763 .channels_min = 1, 764 .channels_max = 4, 765 .rates = CS35L56_RATES, 766 .formats = CS35L56_TX_FORMATS, 767 }, 768 .symmetric_rate = 1, 769 .ops = &cs35l56_sdw_dai_ops, 770 }, 771 }; 772 773 static int cs35l56_write_cal(struct cs35l56_private *cs35l56) 774 { 775 int ret; 776 777 if (cs35l56->base.secured || !cs35l56->base.cal_data_valid) 778 return -ENODATA; 779 780 ret = wm_adsp_run(&cs35l56->dsp); 781 if (ret) 782 return ret; 783 784 ret = cs_amp_write_cal_coeffs(&cs35l56->dsp.cs_dsp, 785 cs35l56->base.calibration_controls, 786 &cs35l56->base.cal_data); 787 788 wm_adsp_stop(&cs35l56->dsp); 789 790 if (ret == 0) 791 dev_info(cs35l56->base.dev, "Calibration applied\n"); 792 793 return ret; 794 } 795 796 static int cs35l56_dsp_download_and_power_up(struct cs35l56_private *cs35l56, 797 bool load_firmware) 798 { 799 int ret; 800 801 /* 802 * Abort the first load if it didn't find the suffixed bins and 803 * we have an alternate fallback suffix. 804 */ 805 cs35l56->dsp.bin_mandatory = (load_firmware && cs35l56->fallback_fw_suffix); 806 807 ret = wm_adsp_power_up(&cs35l56->dsp, load_firmware); 808 if ((ret == -ENOENT) && cs35l56->dsp.bin_mandatory) { 809 cs35l56->dsp.fwf_suffix = cs35l56->fallback_fw_suffix; 810 cs35l56->fallback_fw_suffix = NULL; 811 cs35l56->dsp.bin_mandatory = false; 812 ret = wm_adsp_power_up(&cs35l56->dsp, load_firmware); 813 } 814 815 if (ret) { 816 dev_dbg(cs35l56->base.dev, "wm_adsp_power_up ret %d\n", ret); 817 return ret; 818 } 819 820 return 0; 821 } 822 823 static void cs35l56_reinit_patch(struct cs35l56_private *cs35l56) 824 { 825 int ret; 826 827 ret = cs35l56_dsp_download_and_power_up(cs35l56, true); 828 if (ret) 829 return; 830 831 cs35l56_write_cal(cs35l56); 832 833 /* Always REINIT after applying patch or coefficients */ 834 cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT); 835 } 836 837 static void cs35l56_patch(struct cs35l56_private *cs35l56, bool firmware_missing) 838 { 839 int ret; 840 841 /* Disable SoundWire interrupts to prevent race with IRQ handler thread */ 842 cs35l56_disable_sdw_interrupts(cs35l56); 843 844 ret = cs35l56_firmware_shutdown(&cs35l56->base); 845 if (ret) 846 goto err; 847 848 /* 849 * Use wm_adsp to load and apply the firmware patch and coefficient files, 850 * but only if firmware is missing. If firmware is already patched just 851 * power-up wm_adsp without downloading firmware. 852 */ 853 ret = cs35l56_dsp_download_and_power_up(cs35l56, firmware_missing); 854 if (ret) 855 goto err; 856 857 mutex_lock(&cs35l56->base.irq_lock); 858 859 reinit_completion(&cs35l56->init_completion); 860 861 cs35l56->soft_resetting = true; 862 cs35l56_system_reset(&cs35l56->base, !!cs35l56->sdw_peripheral); 863 864 if (cs35l56->sdw_peripheral) { 865 /* 866 * The system-reset causes the CS35L56 to detach from the bus. 867 * Wait for the manager to re-enumerate the CS35L56 and 868 * cs35l56_init() to run again. 869 */ 870 if (!wait_for_completion_timeout(&cs35l56->init_completion, 871 msecs_to_jiffies(5000))) { 872 dev_err(cs35l56->base.dev, "%s: init_completion timed out (SDW)\n", 873 __func__); 874 goto err_unlock; 875 } 876 } else if (cs35l56_init(cs35l56)) { 877 goto err_unlock; 878 } 879 880 /* Check if the firmware is still reported missing */ 881 cs35l56_warn_if_firmware_missing(&cs35l56->base); 882 883 regmap_clear_bits(cs35l56->base.regmap, 884 cs35l56->base.fw_reg->prot_sts, 885 CS35L56_FIRMWARE_MISSING); 886 cs35l56->base.fw_patched = true; 887 888 if (cs35l56_write_cal(cs35l56) == 0) 889 cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT); 890 891 err_unlock: 892 mutex_unlock(&cs35l56->base.irq_lock); 893 err: 894 cs35l56_enable_sdw_interrupts(cs35l56); 895 } 896 897 static void cs35l56_dsp_work(struct work_struct *work) 898 { 899 struct cs35l56_private *cs35l56 = container_of(work, 900 struct cs35l56_private, 901 dsp_work); 902 unsigned int firmware_version; 903 bool firmware_missing; 904 int ret; 905 906 if (!cs35l56->base.init_done) 907 return; 908 909 PM_RUNTIME_ACQUIRE(cs35l56->base.dev, pm); 910 ret = PM_RUNTIME_ACQUIRE_ERR(&pm); 911 if (ret) { 912 dev_err(cs35l56->base.dev, "dsp_work failed to runtime-resume: %d\n", ret); 913 return; 914 } 915 916 ret = cs35l56_read_prot_status(&cs35l56->base, &firmware_missing, &firmware_version); 917 if (ret) 918 return; 919 920 /* Populate fw file qualifier with the revision and security state */ 921 kfree(cs35l56->dsp.fwf_name); 922 if (firmware_missing) { 923 cs35l56->dsp.fwf_name = kasprintf(GFP_KERNEL, "%02x-dsp1", cs35l56->base.rev); 924 } else { 925 /* Firmware files must match the running firmware version */ 926 cs35l56->dsp.fwf_name = kasprintf(GFP_KERNEL, 927 "%02x%s-%06x-dsp1", 928 cs35l56->base.rev, 929 cs35l56->base.secured ? "-s" : "", 930 firmware_version); 931 } 932 933 if (!cs35l56->dsp.fwf_name) 934 return; 935 936 dev_dbg(cs35l56->base.dev, "DSP fwf name: '%s' system name: '%s'\n", 937 cs35l56->dsp.fwf_name, cs35l56->dsp.system_name); 938 939 /* 940 * The firmware cannot be patched if it is already running from 941 * patch RAM. In this case the firmware files are versioned to 942 * match the running firmware version and will only contain 943 * tunings. We do not need to shutdown the firmware to apply 944 * tunings so can use the lower cost reinit sequence instead. 945 */ 946 if (!firmware_missing) 947 cs35l56_reinit_patch(cs35l56); 948 else 949 cs35l56_patch(cs35l56, firmware_missing); 950 951 cs35l56_log_tuning(&cs35l56->base, &cs35l56->dsp.cs_dsp); 952 } 953 954 static struct snd_soc_dapm_context *cs35l56_power_up_for_cal(struct cs35l56_private *cs35l56) 955 { 956 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(cs35l56->component); 957 int ret; 958 959 ret = snd_soc_dapm_enable_pin(dapm, "Calibrate"); 960 if (ret) 961 return ERR_PTR(ret); 962 963 snd_soc_dapm_sync(dapm); 964 965 return dapm; 966 } 967 968 static void cs35l56_power_down_after_cal(struct cs35l56_private *cs35l56) 969 { 970 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(cs35l56->component); 971 972 snd_soc_dapm_disable_pin(dapm, "Calibrate"); 973 snd_soc_dapm_sync(dapm); 974 } 975 976 static ssize_t cs35l56_debugfs_calibrate_write(struct file *file, 977 const char __user *from, 978 size_t count, loff_t *ppos) 979 { 980 struct cs35l56_base *cs35l56_base = file->private_data; 981 struct cs35l56_private *cs35l56 = cs35l56_private_from_base(cs35l56_base); 982 struct snd_soc_dapm_context *dapm; 983 ssize_t ret; 984 985 dapm = cs35l56_power_up_for_cal(cs35l56); 986 if (IS_ERR(dapm)) 987 return PTR_ERR(dapm); 988 989 snd_soc_dapm_mutex_lock(dapm); 990 ret = cs35l56_calibrate_debugfs_write(&cs35l56->base, from, count, ppos); 991 snd_soc_dapm_mutex_unlock(dapm); 992 993 cs35l56_power_down_after_cal(cs35l56); 994 995 return ret; 996 } 997 998 static ssize_t cs35l56_debugfs_cal_temperature_write(struct file *file, 999 const char __user *from, 1000 size_t count, loff_t *ppos) 1001 { 1002 struct cs35l56_base *cs35l56_base = file->private_data; 1003 struct cs35l56_private *cs35l56 = cs35l56_private_from_base(cs35l56_base); 1004 struct snd_soc_dapm_context *dapm; 1005 ssize_t ret; 1006 1007 dapm = cs35l56_power_up_for_cal(cs35l56); 1008 if (IS_ERR(dapm)) 1009 return PTR_ERR(dapm); 1010 1011 ret = cs35l56_cal_ambient_debugfs_write(&cs35l56->base, from, count, ppos); 1012 cs35l56_power_down_after_cal(cs35l56); 1013 1014 return ret; 1015 } 1016 1017 static ssize_t cs35l56_debugfs_cal_data_read(struct file *file, 1018 char __user *to, 1019 size_t count, loff_t *ppos) 1020 { 1021 struct cs35l56_base *cs35l56_base = file->private_data; 1022 struct cs35l56_private *cs35l56 = cs35l56_private_from_base(cs35l56_base); 1023 struct snd_soc_dapm_context *dapm; 1024 ssize_t ret; 1025 1026 dapm = cs35l56_power_up_for_cal(cs35l56); 1027 if (IS_ERR(dapm)) 1028 return PTR_ERR(dapm); 1029 1030 ret = cs35l56_cal_data_debugfs_read(&cs35l56->base, to, count, ppos); 1031 cs35l56_power_down_after_cal(cs35l56); 1032 1033 return ret; 1034 } 1035 1036 static int cs35l56_new_cal_data_apply(struct cs35l56_private *cs35l56) 1037 { 1038 struct snd_soc_dapm_context *dapm; 1039 int ret; 1040 1041 if (!cs35l56->base.cal_data_valid) 1042 return -ENXIO; 1043 1044 if (cs35l56->base.secured) 1045 return -EACCES; 1046 1047 dapm = cs35l56_power_up_for_cal(cs35l56); 1048 if (IS_ERR(dapm)) 1049 return PTR_ERR(dapm); 1050 1051 snd_soc_dapm_mutex_lock(dapm); 1052 ret = cs_amp_write_cal_coeffs(&cs35l56->dsp.cs_dsp, 1053 cs35l56->base.calibration_controls, 1054 &cs35l56->base.cal_data); 1055 if (ret == 0) 1056 cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_AUDIO_REINIT); 1057 else 1058 ret = -EIO; 1059 1060 snd_soc_dapm_mutex_unlock(dapm); 1061 cs35l56_power_down_after_cal(cs35l56); 1062 1063 return ret; 1064 } 1065 1066 static ssize_t cs35l56_debugfs_cal_data_write(struct file *file, 1067 const char __user *from, 1068 size_t count, loff_t *ppos) 1069 { 1070 struct cs35l56_base *cs35l56_base = file->private_data; 1071 struct cs35l56_private *cs35l56 = cs35l56_private_from_base(cs35l56_base); 1072 int ret; 1073 1074 ret = cs35l56_cal_data_debugfs_write(&cs35l56->base, from, count, ppos); 1075 if (ret == -ENODATA) 1076 return count; /* Ignore writes of empty cal blobs */ 1077 else if (ret < 0) 1078 return -EIO; 1079 1080 ret = cs35l56_new_cal_data_apply(cs35l56); 1081 if (ret) 1082 return ret; 1083 1084 return count; 1085 } 1086 1087 static const struct cs35l56_cal_debugfs_fops cs35l56_cal_debugfs_fops = { 1088 .calibrate = { 1089 .write = cs35l56_debugfs_calibrate_write, 1090 }, 1091 .cal_temperature = { 1092 .write = cs35l56_debugfs_cal_temperature_write, 1093 }, 1094 .cal_data = { 1095 .read = cs35l56_debugfs_cal_data_read, 1096 .write = cs35l56_debugfs_cal_data_write, 1097 }, 1098 }; 1099 1100 static int cs35l56_cal_data_rb_ctl_get(struct snd_kcontrol *kcontrol, 1101 struct snd_ctl_elem_value *ucontrol) 1102 { 1103 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1104 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1105 1106 if (!cs35l56->base.cal_data_valid) 1107 return -ENODATA; 1108 1109 memcpy(ucontrol->value.bytes.data, &cs35l56->base.cal_data, 1110 sizeof(cs35l56->base.cal_data)); 1111 1112 return 0; 1113 } 1114 1115 static int cs35l56_cal_data_ctl_get(struct snd_kcontrol *kcontrol, 1116 struct snd_ctl_elem_value *ucontrol) 1117 { 1118 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1119 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1120 1121 /* 1122 * This control is write-only but mixer libraries often try to read 1123 * a control before writing it. So we have to implement read. 1124 * Return zeros so a write of valid data will always be a change 1125 * from its "current value". 1126 */ 1127 memset(ucontrol->value.bytes.data, 0, sizeof(cs35l56->base.cal_data)); 1128 1129 return 0; 1130 } 1131 1132 static int cs35l56_cal_data_ctl_set(struct snd_kcontrol *kcontrol, 1133 struct snd_ctl_elem_value *ucontrol) 1134 { 1135 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1136 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1137 const struct cirrus_amp_cal_data *cal_data = (const void *)ucontrol->value.bytes.data; 1138 int ret; 1139 1140 if (cs35l56->base.cal_data_valid) 1141 return -EACCES; 1142 1143 ret = cs35l56_stash_calibration(&cs35l56->base, cal_data); 1144 if (ret) 1145 return ret; 1146 1147 ret = cs35l56_new_cal_data_apply(cs35l56); 1148 if (ret < 0) 1149 return ret; 1150 1151 return 1; 1152 } 1153 1154 static int cs35l56_cal_ambient_ctl_get(struct snd_kcontrol *kcontrol, 1155 struct snd_ctl_elem_value *ucontrol) 1156 { 1157 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1158 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1159 1160 ucontrol->value.integer.value[0] = cs35l56->ambient_ctl_value; 1161 1162 return 0; 1163 } 1164 1165 static int cs35l56_cal_ambient_ctl_set(struct snd_kcontrol *kcontrol, 1166 struct snd_ctl_elem_value *ucontrol) 1167 { 1168 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1169 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1170 struct snd_soc_dapm_context *dapm; 1171 int temperature = ucontrol->value.integer.value[0]; 1172 int ret; 1173 1174 if (temperature == cs35l56->ambient_ctl_value) 1175 return 0; 1176 1177 if ((temperature < 0) || (temperature > 40)) 1178 return -EINVAL; 1179 1180 dapm = cs35l56_power_up_for_cal(cs35l56); 1181 if (IS_ERR(dapm)) 1182 return PTR_ERR(dapm); 1183 1184 ret = cs_amp_write_ambient_temp(&cs35l56->dsp.cs_dsp, 1185 cs35l56->base.calibration_controls, 1186 temperature); 1187 cs35l56_power_down_after_cal(cs35l56); 1188 1189 if (ret) 1190 return ret; 1191 1192 cs35l56->ambient_ctl_value = temperature; 1193 1194 return 1; 1195 } 1196 1197 static int cs35l56_calibrate_ctl_get(struct snd_kcontrol *kcontrol, 1198 struct snd_ctl_elem_value *ucontrol) 1199 { 1200 /* 1201 * Allow reading because of user-side libraries that assume all 1202 * controls are readable. But always return false to prevent dumb 1203 * save-restore tools like alsactl accidentically triggering a 1204 * factory calibration when they restore. 1205 */ 1206 ucontrol->value.integer.value[0] = 0; 1207 1208 return 0; 1209 } 1210 1211 static int cs35l56_calibrate_ctl_set(struct snd_kcontrol *kcontrol, 1212 struct snd_ctl_elem_value *ucontrol) 1213 { 1214 struct snd_soc_component *component = snd_kcontrol_chip(kcontrol); 1215 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1216 struct snd_soc_dapm_context *dapm; 1217 int ret; 1218 1219 if (ucontrol->value.integer.value[0] == 0) 1220 return 0; 1221 1222 dapm = cs35l56_power_up_for_cal(cs35l56); 1223 if (IS_ERR(dapm)) 1224 return PTR_ERR(dapm); 1225 1226 snd_soc_dapm_mutex_lock(dapm); 1227 ret = cs35l56_factory_calibrate(&cs35l56->base); 1228 snd_soc_dapm_mutex_unlock(dapm); 1229 cs35l56_power_down_after_cal(cs35l56); 1230 if (ret < 0) 1231 return ret; 1232 1233 return 1; 1234 } 1235 1236 static const struct snd_kcontrol_new cs35l56_cal_data_restore_controls[] = { 1237 SND_SOC_BYTES_E("CAL_DATA", 0, sizeof(struct cirrus_amp_cal_data) / sizeof(u32), 1238 cs35l56_cal_data_ctl_get, cs35l56_cal_data_ctl_set), 1239 SND_SOC_BYTES_E_ACC("CAL_DATA_RB", 0, sizeof(struct cirrus_amp_cal_data) / sizeof(u32), 1240 cs35l56_cal_data_rb_ctl_get, NULL, 1241 SNDRV_CTL_ELEM_ACCESS_READ | SNDRV_CTL_ELEM_ACCESS_VOLATILE), 1242 }; 1243 1244 static const struct snd_kcontrol_new cs35l56_cal_perform_controls[] = { 1245 SOC_SINGLE_EXT("CAL_AMBIENT", SND_SOC_NOPM, 0, 40, 0, 1246 cs35l56_cal_ambient_ctl_get, cs35l56_cal_ambient_ctl_set), 1247 SOC_SINGLE_BOOL_EXT_ACC("Calibrate Switch", 0, 1248 cs35l56_calibrate_ctl_get, cs35l56_calibrate_ctl_set, 1249 SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_VOLATILE), 1250 }; 1251 1252 VISIBLE_IF_KUNIT int cs35l56_set_fw_suffix(struct cs35l56_private *cs35l56) 1253 { 1254 unsigned short vendor, device; 1255 const char *vendor_id; 1256 int ret; 1257 1258 if (cs35l56->dsp.fwf_suffix) 1259 return 0; 1260 1261 if (cs35l56->sdw_peripheral) { 1262 cs35l56->dsp.fwf_suffix = devm_kasprintf(cs35l56->base.dev, GFP_KERNEL, 1263 "l%uu%u", 1264 cs35l56->sdw_link_num, 1265 cs35l56->sdw_unique_id); 1266 if (!cs35l56->dsp.fwf_suffix) 1267 return -ENOMEM; 1268 1269 /* 1270 * There are published firmware files for L56 B0 silicon using 1271 * the ALSA prefix as the filename suffix. Default to trying these 1272 * first, with the new SoundWire suffix as a fallback. 1273 * None of these older systems use a vendor-specific ID. 1274 */ 1275 if ((cs35l56->base.type == 0x56) && (cs35l56->base.rev == 0xb0)) { 1276 cs35l56->fallback_fw_suffix = cs35l56->dsp.fwf_suffix; 1277 cs35l56->dsp.fwf_suffix = cs35l56->component->name_prefix; 1278 1279 return 0; 1280 } 1281 } 1282 1283 /* 1284 * Some manufacturers use the same SSID on multiple products and have 1285 * a vendor-specific qualifier to distinguish different models. 1286 * Models with the same SSID but different qualifier might require 1287 * different audio firmware, or they might all have the same audio 1288 * firmware. 1289 * Try searching for a firmware with this qualifier first, else 1290 * fallback to standard naming. 1291 */ 1292 if (snd_soc_card_get_pci_ssid(cs35l56->component->card, &vendor, &device) < 0) { 1293 vendor_id = cs_amp_devm_get_vendor_specific_variant_id(cs35l56->base.dev, -1, -1); 1294 } else { 1295 vendor_id = cs_amp_devm_get_vendor_specific_variant_id(cs35l56->base.dev, 1296 vendor, device); 1297 } 1298 ret = PTR_ERR_OR_ZERO(vendor_id); 1299 if (ret == -ENOENT) 1300 return 0; 1301 else if (ret) 1302 return ret; 1303 1304 if (vendor_id) { 1305 if (cs35l56->dsp.fwf_suffix) 1306 cs35l56->fallback_fw_suffix = cs35l56->dsp.fwf_suffix; 1307 else 1308 cs35l56->fallback_fw_suffix = cs35l56->component->name_prefix; 1309 1310 cs35l56->dsp.fwf_suffix = devm_kasprintf(cs35l56->base.dev, GFP_KERNEL, 1311 "%s-%s", 1312 vendor_id, 1313 cs35l56->fallback_fw_suffix); 1314 if (!cs35l56->dsp.fwf_suffix) 1315 return -ENOMEM; 1316 } 1317 1318 return 0; 1319 } 1320 EXPORT_SYMBOL_IF_KUNIT(cs35l56_set_fw_suffix); 1321 1322 VISIBLE_IF_KUNIT int cs35l56_set_fw_name(struct snd_soc_component *component) 1323 { 1324 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1325 unsigned short vendor, device; 1326 int ret; 1327 1328 if ((cs35l56->speaker_id < 0) && cs35l56->base.num_onchip_spkid_gpios) { 1329 PM_RUNTIME_ACQUIRE(cs35l56->base.dev, pm); 1330 ret = PM_RUNTIME_ACQUIRE_ERR(&pm); 1331 if (ret) 1332 return ret; 1333 1334 ret = cs35l56_configure_onchip_spkid_pads(&cs35l56->base); 1335 if (ret) 1336 return ret; 1337 1338 ret = cs35l56_read_onchip_spkid(&cs35l56->base); 1339 if (ret < 0) 1340 return ret; 1341 1342 cs35l56->speaker_id = ret; 1343 } 1344 1345 if (!cs35l56->dsp.system_name && 1346 (snd_soc_card_get_pci_ssid(component->card, &vendor, &device) == 0)) { 1347 /* Append a speaker qualifier if there is a speaker ID */ 1348 if (cs35l56->speaker_id >= 0) { 1349 cs35l56->dsp.system_name = devm_kasprintf(cs35l56->base.dev, 1350 GFP_KERNEL, 1351 "%04x%04x-spkid%d", 1352 vendor, device, 1353 cs35l56->speaker_id); 1354 } else { 1355 cs35l56->dsp.system_name = devm_kasprintf(cs35l56->base.dev, 1356 GFP_KERNEL, 1357 "%04x%04x", 1358 vendor, device); 1359 } 1360 if (!cs35l56->dsp.system_name) 1361 return -ENOMEM; 1362 } 1363 1364 return 0; 1365 } 1366 EXPORT_SYMBOL_IF_KUNIT(cs35l56_set_fw_name); 1367 1368 static int _cs35l56_component_probe(struct snd_soc_component *component) 1369 { 1370 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component); 1371 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1372 struct dentry *debugfs_root = component->debugfs_root; 1373 int ret; 1374 1375 BUILD_BUG_ON(ARRAY_SIZE(cs35l56_tx_input_texts) != ARRAY_SIZE(cs35l56_tx_input_values)); 1376 1377 cs35l56->dsp.part = kasprintf(GFP_KERNEL, "cs35l%02x", cs35l56->base.type); 1378 if (!cs35l56->dsp.part) 1379 return -ENOMEM; 1380 1381 cs35l56->component = component; 1382 ret = cs35l56_set_fw_name(component); 1383 if (ret) 1384 return ret; 1385 1386 ret = cs35l56_set_fw_suffix(cs35l56); 1387 if (ret) 1388 return ret; 1389 1390 wm_adsp2_component_probe(&cs35l56->dsp, component); 1391 1392 debugfs_create_bool("init_done", 0444, debugfs_root, &cs35l56->base.init_done); 1393 debugfs_create_bool("can_hibernate", 0444, debugfs_root, &cs35l56->base.can_hibernate); 1394 debugfs_create_bool("fw_patched", 0444, debugfs_root, &cs35l56->base.fw_patched); 1395 1396 1397 switch (cs35l56->base.type) { 1398 case 0x54: 1399 case 0x56: 1400 case 0x57: 1401 ret = snd_soc_add_component_controls(component, cs35l56_controls, 1402 ARRAY_SIZE(cs35l56_controls)); 1403 break; 1404 case 0x63: 1405 case 0x62: 1406 ret = snd_soc_add_component_controls(component, cs35l63_controls, 1407 ARRAY_SIZE(cs35l63_controls)); 1408 break; 1409 default: 1410 ret = -ENODEV; 1411 break; 1412 } 1413 1414 if (!ret && IS_ENABLED(CONFIG_SND_SOC_CS35L56_CAL_SET_CTRL)) { 1415 ret = snd_soc_add_component_controls(component, 1416 cs35l56_cal_data_restore_controls, 1417 ARRAY_SIZE(cs35l56_cal_data_restore_controls)); 1418 } 1419 1420 if (!ret && IS_ENABLED(CONFIG_SND_SOC_CS35L56_CAL_PERFORM_CTRL)) { 1421 ret = snd_soc_add_component_controls(component, 1422 cs35l56_cal_perform_controls, 1423 ARRAY_SIZE(cs35l56_cal_perform_controls)); 1424 } 1425 1426 if (ret) 1427 return dev_err_probe(cs35l56->base.dev, ret, "unable to add controls\n"); 1428 1429 ret = snd_soc_dapm_disable_pin(dapm, "Calibrate"); 1430 if (ret) 1431 return ret; 1432 1433 if (IS_ENABLED(CONFIG_SND_SOC_CS35L56_CAL_DEBUGFS)) 1434 cs35l56_create_cal_debugfs(&cs35l56->base, &cs35l56_cal_debugfs_fops); 1435 1436 queue_work(cs35l56->dsp_wq, &cs35l56->dsp_work); 1437 1438 return 0; 1439 } 1440 1441 static void cs35l56_component_remove(struct snd_soc_component *component) 1442 { 1443 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1444 1445 cancel_work_sync(&cs35l56->dsp_work); 1446 1447 cs35l56_remove_cal_debugfs(&cs35l56->base); 1448 1449 if (cs35l56->dsp.cs_dsp.booted) 1450 wm_adsp_power_down(&cs35l56->dsp); 1451 1452 wm_adsp2_component_remove(&cs35l56->dsp, component); 1453 1454 kfree(cs35l56->dsp.part); 1455 cs35l56->dsp.part = NULL; 1456 1457 kfree(cs35l56->dsp.fwf_name); 1458 cs35l56->dsp.fwf_name = NULL; 1459 1460 cs35l56->component = NULL; 1461 } 1462 1463 static int cs35l56_component_probe(struct snd_soc_component *component) 1464 { 1465 int ret; 1466 1467 ret = _cs35l56_component_probe(component); 1468 if (ret < 0) 1469 cs35l56_component_remove(component); 1470 1471 return ret; 1472 } 1473 1474 static int cs35l56_set_bias_level(struct snd_soc_component *component, 1475 enum snd_soc_bias_level level) 1476 { 1477 struct cs35l56_private *cs35l56 = snd_soc_component_get_drvdata(component); 1478 struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component); 1479 1480 switch (level) { 1481 case SND_SOC_BIAS_STANDBY: 1482 /* 1483 * Wait for patching to complete when transitioning from 1484 * BIAS_OFF to BIAS_STANDBY 1485 */ 1486 if (snd_soc_dapm_get_bias_level(dapm) == SND_SOC_BIAS_OFF) 1487 cs35l56_wait_dsp_ready(cs35l56); 1488 1489 break; 1490 default: 1491 break; 1492 } 1493 1494 return 0; 1495 } 1496 1497 static const struct snd_soc_component_driver soc_component_dev_cs35l56 = { 1498 .probe = cs35l56_component_probe, 1499 .remove = cs35l56_component_remove, 1500 1501 .dapm_widgets = cs35l56_dapm_widgets, 1502 .num_dapm_widgets = ARRAY_SIZE(cs35l56_dapm_widgets), 1503 .dapm_routes = cs35l56_audio_map, 1504 .num_dapm_routes = ARRAY_SIZE(cs35l56_audio_map), 1505 1506 .set_bias_level = cs35l56_set_bias_level, 1507 1508 .suspend_bias_off = 1, /* see cs35l56_system_resume() */ 1509 }; 1510 1511 static int __maybe_unused cs35l56_runtime_suspend_i2c_spi(struct device *dev) 1512 { 1513 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1514 1515 return cs35l56_runtime_suspend_common(&cs35l56->base); 1516 } 1517 1518 static int __maybe_unused cs35l56_runtime_resume_i2c_spi(struct device *dev) 1519 { 1520 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1521 1522 return cs35l56_runtime_resume_common(&cs35l56->base, false); 1523 } 1524 1525 int cs35l56_system_suspend(struct device *dev) 1526 { 1527 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1528 int ret; 1529 1530 dev_dbg(dev, "system_suspend\n"); 1531 1532 if (cs35l56->component) 1533 flush_work(&cs35l56->dsp_work); 1534 1535 /* 1536 * The interrupt line is normally shared, but after we start suspending 1537 * we can't check if our device is the source of an interrupt, and can't 1538 * clear it. Prevent this race by temporarily disabling the parent irq 1539 * until we reach _no_irq. 1540 */ 1541 if (cs35l56->base.irq) 1542 disable_irq(cs35l56->base.irq); 1543 1544 ret = pm_runtime_force_suspend(dev); 1545 if ((ret < 0) && cs35l56->base.irq) 1546 enable_irq(cs35l56->base.irq); 1547 1548 return ret; 1549 } 1550 EXPORT_SYMBOL_GPL(cs35l56_system_suspend); 1551 1552 int cs35l56_system_suspend_late(struct device *dev) 1553 { 1554 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1555 1556 dev_dbg(dev, "system_suspend_late\n"); 1557 1558 /* 1559 * Assert RESET before removing supplies. 1560 * RESET is usually shared by all amps so it must not be asserted until 1561 * all driver instances have done their suspend() stage. 1562 */ 1563 if (cs35l56->base.reset_gpio) { 1564 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0); 1565 cs35l56_wait_min_reset_pulse(); 1566 } 1567 1568 regulator_bulk_disable(ARRAY_SIZE(cs35l56->supplies), cs35l56->supplies); 1569 1570 return 0; 1571 } 1572 EXPORT_SYMBOL_GPL(cs35l56_system_suspend_late); 1573 1574 int cs35l56_system_suspend_no_irq(struct device *dev) 1575 { 1576 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1577 1578 dev_dbg(dev, "system_suspend_no_irq\n"); 1579 1580 /* Handlers are now disabled so the parent IRQ can safely be re-enabled. */ 1581 if (cs35l56->base.irq) 1582 enable_irq(cs35l56->base.irq); 1583 1584 return 0; 1585 } 1586 EXPORT_SYMBOL_GPL(cs35l56_system_suspend_no_irq); 1587 1588 int cs35l56_system_resume_no_irq(struct device *dev) 1589 { 1590 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1591 1592 dev_dbg(dev, "system_resume_no_irq\n"); 1593 1594 /* 1595 * WAKE interrupts unmask if the CS35L56 hibernates, which can cause 1596 * spurious interrupts, and the interrupt line is normally shared. 1597 * We can't check if our device is the source of an interrupt, and can't 1598 * clear it, until it has fully resumed. Prevent this race by temporarily 1599 * disabling the parent irq until we complete resume(). 1600 */ 1601 if (cs35l56->base.irq) 1602 disable_irq(cs35l56->base.irq); 1603 1604 return 0; 1605 } 1606 EXPORT_SYMBOL_GPL(cs35l56_system_resume_no_irq); 1607 1608 int cs35l56_system_resume_early(struct device *dev) 1609 { 1610 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1611 int ret; 1612 1613 dev_dbg(dev, "system_resume_early\n"); 1614 1615 /* Ensure a spec-compliant RESET pulse. */ 1616 if (cs35l56->base.reset_gpio) { 1617 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0); 1618 cs35l56_wait_min_reset_pulse(); 1619 } 1620 1621 /* Enable supplies before releasing RESET. */ 1622 ret = regulator_bulk_enable(ARRAY_SIZE(cs35l56->supplies), cs35l56->supplies); 1623 if (ret) { 1624 dev_err(dev, "system_resume_early failed to enable supplies: %d\n", ret); 1625 return ret; 1626 } 1627 1628 /* Release shared RESET before drivers start resume(). */ 1629 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1); 1630 1631 return 0; 1632 } 1633 EXPORT_SYMBOL_GPL(cs35l56_system_resume_early); 1634 1635 int cs35l56_system_resume(struct device *dev) 1636 { 1637 struct cs35l56_private *cs35l56 = dev_get_drvdata(dev); 1638 int ret; 1639 1640 dev_dbg(dev, "system_resume\n"); 1641 1642 /* 1643 * We might have done a hard reset or the CS35L56 was power-cycled 1644 * so wait for control port to be ready. 1645 */ 1646 cs35l56_wait_control_port_ready(); 1647 1648 /* Undo pm_runtime_force_suspend() before re-enabling the irq */ 1649 ret = pm_runtime_force_resume(dev); 1650 if (cs35l56->base.irq) 1651 enable_irq(cs35l56->base.irq); 1652 1653 if (ret) 1654 return ret; 1655 1656 /* Firmware won't have been loaded if the component hasn't probed */ 1657 if (!cs35l56->component) 1658 return 0; 1659 1660 ret = cs35l56_is_fw_reload_needed(&cs35l56->base); 1661 dev_dbg(cs35l56->base.dev, "fw_reload_needed: %d\n", ret); 1662 if (ret < 1) 1663 return ret; 1664 1665 cs35l56->base.fw_patched = false; 1666 wm_adsp_power_down(&cs35l56->dsp); 1667 queue_work(cs35l56->dsp_wq, &cs35l56->dsp_work); 1668 1669 /* 1670 * suspend_bias_off ensures we are now in BIAS_OFF so there will be 1671 * a BIAS_OFF->BIAS_STANDBY transition to complete dsp patching. 1672 */ 1673 1674 return 0; 1675 } 1676 EXPORT_SYMBOL_GPL(cs35l56_system_resume); 1677 1678 static int cs35l56_control_add_nop(struct wm_adsp *dsp, struct cs_dsp_coeff_ctl *cs_ctl) 1679 { 1680 return 0; 1681 } 1682 1683 static int cs35l56_dsp_init(struct cs35l56_private *cs35l56) 1684 { 1685 struct wm_adsp *dsp; 1686 int ret; 1687 1688 cs35l56->dsp_wq = create_singlethread_workqueue("cs35l56-dsp"); 1689 if (!cs35l56->dsp_wq) 1690 return -ENOMEM; 1691 1692 INIT_WORK(&cs35l56->dsp_work, cs35l56_dsp_work); 1693 1694 dsp = &cs35l56->dsp; 1695 cs35l56_init_cs_dsp(&cs35l56->base, &dsp->cs_dsp); 1696 1697 /* 1698 * dsp->part is filled in later as it is based on the DEVID. In a 1699 * SoundWire system that cannot be read until enumeration has occurred 1700 * and the device has attached. 1701 */ 1702 dsp->fw = 12; 1703 dsp->wmfw_optional = true; 1704 1705 /* 1706 * None of the firmware controls need to be exported so add a no-op 1707 * callback that suppresses creating an ALSA control. 1708 */ 1709 dsp->control_add = &cs35l56_control_add_nop; 1710 1711 dev_dbg(cs35l56->base.dev, "DSP system name: '%s'\n", dsp->system_name); 1712 1713 ret = wm_halo_init(dsp); 1714 if (ret != 0) { 1715 dev_err(cs35l56->base.dev, "wm_halo_init failed\n"); 1716 return ret; 1717 } 1718 1719 return 0; 1720 } 1721 1722 static int cs35l56_read_fwnode_u32_array(struct device *dev, 1723 struct fwnode_handle *parent_node, 1724 const char *prop_name, 1725 int max_count, 1726 u32 *dest) 1727 { 1728 int count, ret; 1729 1730 count = fwnode_property_count_u32(parent_node, prop_name); 1731 if ((count == 0) || (count == -EINVAL) || (count == -ENODATA)) { 1732 dev_dbg(dev, "%s not found in %s\n", prop_name, fwnode_get_name(parent_node)); 1733 return 0; 1734 } 1735 1736 if (count < 0) { 1737 dev_err(dev, "Get %s error:%d\n", prop_name, count); 1738 return count; 1739 } 1740 1741 if (count > max_count) { 1742 dev_err(dev, "%s too many entries (%d)\n", prop_name, count); 1743 return -EOVERFLOW; 1744 } 1745 1746 ret = fwnode_property_read_u32_array(parent_node, prop_name, dest, count); 1747 if (ret) { 1748 dev_err(dev, "Error reading %s: %d\n", prop_name, ret); 1749 return ret; 1750 } 1751 1752 return count; 1753 } 1754 1755 static int cs35l56_process_xu_onchip_speaker_id(struct cs35l56_private *cs35l56, 1756 struct fwnode_handle *ext_node) 1757 { 1758 static const char * const gpio_name = "01fa-spk-id-gpios-onchip"; 1759 static const char * const pull_name = "01fa-spk-id-gpios-onchip-pull"; 1760 u32 gpios[5], pulls[5]; 1761 int num_gpios, num_pulls; 1762 int ret; 1763 1764 static_assert(ARRAY_SIZE(gpios) == ARRAY_SIZE(cs35l56->base.onchip_spkid_gpios)); 1765 static_assert(ARRAY_SIZE(pulls) == ARRAY_SIZE(cs35l56->base.onchip_spkid_pulls)); 1766 1767 num_gpios = cs35l56_read_fwnode_u32_array(cs35l56->base.dev, ext_node, gpio_name, 1768 ARRAY_SIZE(gpios), gpios); 1769 if (num_gpios < 1) 1770 return num_gpios; 1771 1772 num_pulls = cs35l56_read_fwnode_u32_array(cs35l56->base.dev, ext_node, pull_name, 1773 ARRAY_SIZE(pulls), pulls); 1774 if (num_pulls < 0) 1775 return num_pulls; 1776 1777 if (num_pulls && (num_pulls != num_gpios)) { 1778 dev_warn(cs35l56->base.dev, "%s count(%d) != %s count(%d)\n", 1779 pull_name, num_pulls, gpio_name, num_gpios); 1780 } 1781 1782 ret = cs35l56_check_and_save_onchip_spkid_gpios(&cs35l56->base, 1783 gpios, num_gpios, 1784 pulls, num_pulls); 1785 if (ret) { 1786 return dev_err_probe(cs35l56->base.dev, ret, "Error in %s/%s\n", 1787 gpio_name, pull_name); 1788 } 1789 1790 return 0; 1791 } 1792 1793 VISIBLE_IF_KUNIT int cs35l56_process_xu_properties(struct cs35l56_private *cs35l56) 1794 { 1795 struct fwnode_handle *ext_node = NULL; 1796 struct fwnode_handle *link; 1797 int ret; 1798 1799 if (!cs35l56->sdw_peripheral) 1800 return 0; 1801 1802 fwnode_for_each_child_node(dev_fwnode(cs35l56->base.dev), link) { 1803 ext_node = fwnode_get_named_child_node(link, 1804 "mipi-sdca-function-expansion-subproperties"); 1805 if (ext_node) { 1806 fwnode_handle_put(link); 1807 break; 1808 } 1809 } 1810 1811 if (!ext_node) 1812 return 0; 1813 1814 ret = cs35l56_process_xu_onchip_speaker_id(cs35l56, ext_node); 1815 fwnode_handle_put(ext_node); 1816 1817 return ret; 1818 } 1819 EXPORT_SYMBOL_IF_KUNIT(cs35l56_process_xu_properties); 1820 1821 VISIBLE_IF_KUNIT int cs35l56_get_firmware_uid(struct cs35l56_private *cs35l56) 1822 { 1823 struct device *dev = cs35l56->base.dev; 1824 const char *prop; 1825 int ret; 1826 1827 ret = device_property_read_string(dev, "cirrus,firmware-uid", &prop); 1828 /* If bad sw node property, return 0 and fallback to legacy firmware path */ 1829 if (ret < 0) 1830 return 0; 1831 1832 /* Append a speaker qualifier if there is a speaker ID */ 1833 if (cs35l56->speaker_id >= 0) 1834 cs35l56->dsp.system_name = devm_kasprintf(dev, GFP_KERNEL, "%s-spkid%d", 1835 prop, cs35l56->speaker_id); 1836 else 1837 cs35l56->dsp.system_name = devm_kstrdup(dev, prop, GFP_KERNEL); 1838 1839 if (cs35l56->dsp.system_name == NULL) 1840 return -ENOMEM; 1841 1842 dev_dbg(dev, "Firmware UID: %s\n", cs35l56->dsp.system_name); 1843 1844 return 0; 1845 } 1846 EXPORT_SYMBOL_IF_KUNIT(cs35l56_get_firmware_uid); 1847 1848 /* 1849 * Some SoundWire laptops have a spk-id-gpios property but it points to 1850 * the wrong ACPI Device node so can't be used to get the GPIO. Try to 1851 * find the SDCA node containing the GpioIo resource and add a GPIO 1852 * mapping to it. 1853 */ 1854 static const struct acpi_gpio_params cs35l56_af01_first_gpio = { 0, 0, false }; 1855 static const struct acpi_gpio_mapping cs35l56_af01_spkid_gpios_mapping[] = { 1856 { "spk-id-gpios", &cs35l56_af01_first_gpio, 1 }, 1857 { } 1858 }; 1859 1860 static void cs35l56_acpi_dev_release_driver_gpios(void *adev) 1861 { 1862 acpi_dev_remove_driver_gpios(adev); 1863 } 1864 1865 static int cs35l56_try_get_broken_sdca_spkid_gpio(struct cs35l56_private *cs35l56) 1866 { 1867 struct fwnode_handle *af01_fwnode; 1868 const union acpi_object *obj; 1869 struct gpio_desc *desc; 1870 int ret; 1871 1872 /* Find the SDCA node containing the GpioIo */ 1873 af01_fwnode = device_get_named_child_node(cs35l56->base.dev, "AF01"); 1874 if (!af01_fwnode) { 1875 dev_dbg(cs35l56->base.dev, "No AF01 node\n"); 1876 return -ENOENT; 1877 } 1878 1879 ret = acpi_dev_get_property(ACPI_COMPANION(cs35l56->base.dev), 1880 "spk-id-gpios", ACPI_TYPE_PACKAGE, &obj); 1881 if (ret) { 1882 dev_dbg(cs35l56->base.dev, "Could not get spk-id-gpios package: %d\n", ret); 1883 fwnode_handle_put(af01_fwnode); 1884 return -ENOENT; 1885 } 1886 1887 /* The broken properties we can handle are a 4-element package (one GPIO) */ 1888 if (obj->package.count != 4) { 1889 dev_warn(cs35l56->base.dev, "Unexpected spk-id element count %d\n", 1890 obj->package.count); 1891 fwnode_handle_put(af01_fwnode); 1892 return -ENOENT; 1893 } 1894 1895 /* Add a GPIO mapping if it doesn't already have one */ 1896 if (!fwnode_property_present(af01_fwnode, "spk-id-gpios")) { 1897 struct acpi_device *adev = to_acpi_device_node(af01_fwnode); 1898 1899 /* 1900 * Can't use devm_acpi_dev_add_driver_gpios() because the 1901 * mapping isn't being added to the node pointed to by 1902 * ACPI_COMPANION(). 1903 */ 1904 ret = acpi_dev_add_driver_gpios(adev, cs35l56_af01_spkid_gpios_mapping); 1905 if (ret) { 1906 fwnode_handle_put(af01_fwnode); 1907 return dev_err_probe(cs35l56->base.dev, ret, 1908 "Failed to add gpio mapping to AF01\n"); 1909 } 1910 1911 ret = devm_add_action_or_reset(cs35l56->base.dev, 1912 cs35l56_acpi_dev_release_driver_gpios, 1913 adev); 1914 if (ret) { 1915 fwnode_handle_put(af01_fwnode); 1916 return ret; 1917 } 1918 1919 dev_dbg(cs35l56->base.dev, "Added spk-id-gpios mapping to AF01\n"); 1920 } 1921 1922 desc = fwnode_gpiod_get_index(af01_fwnode, "spk-id", 0, GPIOD_IN, NULL); 1923 if (IS_ERR(desc)) { 1924 fwnode_handle_put(af01_fwnode); 1925 ret = PTR_ERR(desc); 1926 return dev_err_probe(cs35l56->base.dev, ret, "Get GPIO from AF01 failed\n"); 1927 } 1928 1929 ret = gpiod_get_value_cansleep(desc); 1930 gpiod_put(desc); 1931 1932 if (ret < 0) { 1933 fwnode_handle_put(af01_fwnode); 1934 dev_err_probe(cs35l56->base.dev, ret, "Error reading spk-id GPIO\n"); 1935 return ret; 1936 } 1937 1938 fwnode_handle_put(af01_fwnode); 1939 1940 dev_info(cs35l56->base.dev, "Got spk-id from AF01\n"); 1941 1942 return ret; 1943 } 1944 1945 static int cs35l56_component_register(struct cs35l56_private *cs35l56) 1946 { 1947 int ret; 1948 1949 ret = snd_soc_register_component(cs35l56->base.dev, 1950 &soc_component_dev_cs35l56, 1951 cs35l56_dai, ARRAY_SIZE(cs35l56_dai)); 1952 if (ret < 0) { 1953 dev_err(cs35l56->base.dev, "Register codec failed: %d\n", ret); 1954 return ret; 1955 } 1956 1957 cs35l56->component_registered = true; 1958 1959 return 0; 1960 } 1961 1962 static void cs35l56_component_register_work(struct work_struct *work) 1963 { 1964 struct cs35l56_private *cs35l56 = container_of(work, 1965 struct cs35l56_private, 1966 component_register_work); 1967 int ret; 1968 1969 guard(mutex)(&cs35l56_component_register_lock); 1970 1971 if (cs35l56_shutting_down) 1972 return; 1973 1974 PM_RUNTIME_ACQUIRE_AUTOSUSPEND(cs35l56->base.dev, pm_err); 1975 ret = PM_RUNTIME_ACQUIRE_ERR(&pm_err); 1976 if (ret) { 1977 dev_err(cs35l56->base.dev, "register_work failed to get pm_runtime: %d\n", ret); 1978 return; 1979 } 1980 1981 cs35l56_component_register(cs35l56); 1982 } 1983 1984 int cs35l56_common_probe(struct cs35l56_private *cs35l56, int irq) 1985 { 1986 int ret; 1987 1988 init_completion(&cs35l56->init_completion); 1989 mutex_init(&cs35l56->base.irq_lock); 1990 cs35l56->base.cal_index = -1; 1991 cs35l56->speaker_id = -ENOENT; 1992 INIT_WORK(&cs35l56->component_register_work, cs35l56_component_register_work); 1993 1994 dev_set_drvdata(cs35l56->base.dev, cs35l56); 1995 1996 cs35l56_fill_supply_names(cs35l56->supplies); 1997 ret = devm_regulator_bulk_get(cs35l56->base.dev, ARRAY_SIZE(cs35l56->supplies), 1998 cs35l56->supplies); 1999 if (ret != 0) 2000 return dev_err_probe(cs35l56->base.dev, ret, "Failed to request supplies\n"); 2001 2002 /* Reset could be controlled by the BIOS or shared by multiple amps */ 2003 cs35l56->base.reset_gpio = devm_gpiod_get_optional(cs35l56->base.dev, "reset", 2004 GPIOD_OUT_LOW); 2005 if (IS_ERR(cs35l56->base.reset_gpio)) { 2006 ret = PTR_ERR(cs35l56->base.reset_gpio); 2007 /* 2008 * If RESET is shared the first amp to probe will grab the reset 2009 * line and reset all the amps 2010 */ 2011 if (ret != -EBUSY) 2012 return dev_err_probe(cs35l56->base.dev, ret, "Failed to get reset GPIO\n"); 2013 2014 dev_info(cs35l56->base.dev, "Reset GPIO busy, assume shared reset\n"); 2015 cs35l56->base.reset_gpio = NULL; 2016 } 2017 2018 ret = regulator_bulk_enable(ARRAY_SIZE(cs35l56->supplies), cs35l56->supplies); 2019 if (ret != 0) 2020 return dev_err_probe(cs35l56->base.dev, ret, "Failed to enable supplies\n"); 2021 2022 if (cs35l56->base.reset_gpio) { 2023 /* ACPI can override GPIOD_OUT_LOW flag so force it to start low */ 2024 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0); 2025 cs35l56_wait_min_reset_pulse(); 2026 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 1); 2027 } 2028 2029 ret = cs35l56_get_speaker_id(&cs35l56->base); 2030 if (ACPI_COMPANION(cs35l56->base.dev) && cs35l56->sdw_peripheral && (ret == -ENOENT)) 2031 ret = cs35l56_try_get_broken_sdca_spkid_gpio(cs35l56); 2032 2033 if ((ret < 0) && (ret != -ENOENT)) 2034 goto err; 2035 2036 cs35l56->speaker_id = ret; 2037 2038 ret = cs35l56_get_firmware_uid(cs35l56); 2039 if (ret != 0) 2040 goto err; 2041 2042 ret = cs35l56_process_xu_properties(cs35l56); 2043 if (ret) 2044 goto err; 2045 2046 ret = cs35l56_dsp_init(cs35l56); 2047 if (ret < 0) { 2048 dev_err_probe(cs35l56->base.dev, ret, "DSP init failed\n"); 2049 goto err; 2050 } 2051 2052 /* 2053 * On SoundWire the cs35l56_init() cannot be run until after the 2054 * device has been enumerated by the SoundWire core. 2055 */ 2056 if (!cs35l56->sdw_peripheral) { 2057 ret = cs35l56_init(cs35l56); 2058 if (ret) 2059 goto err_remove_wm_adsp; 2060 } 2061 2062 ret = cs35l56_irq_request(&cs35l56->base, irq); 2063 if (ret) 2064 goto err_remove_wm_adsp; 2065 2066 /* 2067 * Defer calling snd_soc_register_component() on SoundWire to prevent 2068 * a deadlock where it calls our component_probe(), which requires the 2069 * SoundWire enumeration to complete, but because we are still in probe() 2070 * the SoundWire core will not call the update_status() callback. At time 2071 * of writing snd_soc_register_component() never returns EPROBE_DEFER. 2072 */ 2073 if (!cs35l56->sdw_peripheral) { 2074 ret = cs35l56_component_register(cs35l56); 2075 if (ret < 0) 2076 goto err_free_irq; 2077 } 2078 2079 return 0; 2080 2081 err_free_irq: 2082 if (cs35l56->base.irq) 2083 devm_free_irq(cs35l56->base.dev, cs35l56->base.irq, &cs35l56->base); 2084 2085 err_remove_wm_adsp: 2086 wm_adsp2_remove(&cs35l56->dsp); 2087 2088 err: 2089 if (pm_runtime_enabled(cs35l56->base.dev)) { 2090 pm_runtime_dont_use_autosuspend(cs35l56->base.dev); 2091 pm_runtime_disable(cs35l56->base.dev); 2092 } 2093 2094 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0); 2095 regulator_bulk_disable(ARRAY_SIZE(cs35l56->supplies), cs35l56->supplies); 2096 2097 if (cs35l56->dsp_wq) 2098 destroy_workqueue(cs35l56->dsp_wq); 2099 2100 return ret; 2101 } 2102 EXPORT_SYMBOL_NS_GPL(cs35l56_common_probe, "SND_SOC_CS35L56_CORE"); 2103 2104 int cs35l56_init(struct cs35l56_private *cs35l56) 2105 { 2106 bool first_time_init = !cs35l56->base.init_done; 2107 int ret; 2108 2109 /* 2110 * Check whether the actions associated with soft reset or one time 2111 * init need to be performed. 2112 */ 2113 if (cs35l56->soft_resetting) 2114 goto post_soft_reset; 2115 2116 if (cs35l56->base.init_done) 2117 return 0; 2118 2119 pm_runtime_set_autosuspend_delay(cs35l56->base.dev, 2120 CS35L56_FW_REQ_ACTIVE_TIMEOUT_MS + 50); 2121 pm_runtime_use_autosuspend(cs35l56->base.dev); 2122 pm_runtime_set_active(cs35l56->base.dev); 2123 pm_runtime_enable(cs35l56->base.dev); 2124 2125 ret = cs35l56_hw_init(&cs35l56->base); 2126 if (ret < 0) 2127 return ret; 2128 2129 ret = cs35l56_set_patch(&cs35l56->base); 2130 if (ret) 2131 return ret; 2132 2133 ret = cs35l56_get_calibration(&cs35l56->base); 2134 if (ret) 2135 return ret; 2136 2137 if (!cs35l56->base.reset_gpio) { 2138 dev_dbg(cs35l56->base.dev, "No reset gpio: using soft reset\n"); 2139 cs35l56->soft_resetting = true; 2140 cs35l56_system_reset(&cs35l56->base, !!cs35l56->sdw_peripheral); 2141 if (cs35l56->sdw_peripheral) { 2142 /* Keep alive while we wait for re-enumeration */ 2143 pm_runtime_get_noresume(cs35l56->base.dev); 2144 return 0; 2145 } 2146 } 2147 2148 post_soft_reset: 2149 if (cs35l56->soft_resetting) { 2150 cs35l56->soft_resetting = false; 2151 2152 /* Done re-enumerating after one-time init so release the keep-alive */ 2153 if (cs35l56->sdw_peripheral && !cs35l56->base.init_done) 2154 pm_runtime_put_noidle(cs35l56->base.dev); 2155 2156 regcache_mark_dirty(cs35l56->base.regmap); 2157 ret = cs35l56_wait_for_firmware_boot(&cs35l56->base); 2158 if (ret) 2159 return ret; 2160 2161 dev_dbg(cs35l56->base.dev, "Firmware rebooted after soft reset\n"); 2162 2163 regcache_cache_only(cs35l56->base.regmap, false); 2164 } 2165 2166 /* Disable auto-hibernate so that runtime_pm has control */ 2167 ret = cs35l56_mbox_send(&cs35l56->base, CS35L56_MBOX_CMD_PREVENT_AUTO_HIBERNATE); 2168 if (ret) 2169 return ret; 2170 2171 /* Registers could be dirty after soft reset or SoundWire enumeration */ 2172 regcache_sync(cs35l56->base.regmap); 2173 2174 /* Set ASP1 DOUT to high-impedance when it is not transmitting audio data. */ 2175 ret = regmap_set_bits(cs35l56->base.regmap, CS35L56_ASP1_CONTROL3, 2176 CS35L56_ASP1_DOUT_HIZ_CTRL_MASK); 2177 if (ret) 2178 return dev_err_probe(cs35l56->base.dev, ret, "Failed to write ASP1_CONTROL3\n"); 2179 2180 cs35l56->base.init_done = true; 2181 complete_all(&cs35l56->init_completion); 2182 2183 if (cs35l56->sdw_peripheral && first_time_init) { 2184 /* 2185 * Hardware now accessible, queue work to call 2186 * snd_soc_register_component(). 2187 */ 2188 queue_work(system_freezable_wq, &cs35l56->component_register_work); 2189 } 2190 2191 return 0; 2192 } 2193 EXPORT_SYMBOL_NS_GPL(cs35l56_init, "SND_SOC_CS35L56_CORE"); 2194 2195 void cs35l56_remove(struct cs35l56_private *cs35l56) 2196 { 2197 cancel_work_sync(&cs35l56->component_register_work); 2198 if (cs35l56->component_registered) 2199 snd_soc_unregister_component(cs35l56->base.dev); 2200 2201 cs35l56->base.init_done = false; 2202 2203 /* 2204 * WAKE IRQs unmask if CS35L56 hibernates so free the handler to 2205 * prevent it racing with remove(). 2206 */ 2207 if (cs35l56->base.irq) 2208 devm_free_irq(cs35l56->base.dev, cs35l56->base.irq, &cs35l56->base); 2209 2210 destroy_workqueue(cs35l56->dsp_wq); 2211 2212 wm_adsp2_remove(&cs35l56->dsp); 2213 2214 pm_runtime_dont_use_autosuspend(cs35l56->base.dev); 2215 pm_runtime_suspend(cs35l56->base.dev); 2216 pm_runtime_disable(cs35l56->base.dev); 2217 2218 regcache_cache_only(cs35l56->base.regmap, true); 2219 2220 gpiod_set_value_cansleep(cs35l56->base.reset_gpio, 0); 2221 regulator_bulk_disable(ARRAY_SIZE(cs35l56->supplies), cs35l56->supplies); 2222 } 2223 EXPORT_SYMBOL_NS_GPL(cs35l56_remove, "SND_SOC_CS35L56_CORE"); 2224 2225 #if IS_ENABLED(CONFIG_SND_SOC_CS35L56_I2C) || IS_ENABLED(CONFIG_SND_SOC_CS35L56_SPI) 2226 EXPORT_NS_GPL_DEV_PM_OPS(cs35l56_pm_ops_i2c_spi, SND_SOC_CS35L56_CORE) = { 2227 SET_RUNTIME_PM_OPS(cs35l56_runtime_suspend_i2c_spi, cs35l56_runtime_resume_i2c_spi, NULL) 2228 SYSTEM_SLEEP_PM_OPS(cs35l56_system_suspend, cs35l56_system_resume) 2229 LATE_SYSTEM_SLEEP_PM_OPS(cs35l56_system_suspend_late, cs35l56_system_resume_early) 2230 NOIRQ_SYSTEM_SLEEP_PM_OPS(cs35l56_system_suspend_no_irq, cs35l56_system_resume_no_irq) 2231 }; 2232 #endif 2233 2234 static int cs35l56_reboot_notify(struct notifier_block *nb, 2235 unsigned long action, void *data) 2236 { 2237 guard(mutex)(&cs35l56_component_register_lock); 2238 cs35l56_shutting_down = true; 2239 2240 return NOTIFY_DONE; 2241 } 2242 2243 static struct notifier_block cs35l56_reboot_notifier = { 2244 .notifier_call = cs35l56_reboot_notify, 2245 }; 2246 2247 static int __init cs35l56_modinit(void) 2248 { 2249 /* 2250 * Use reboot notifier to prevent race between shutdown and 2251 * snd_soc_register_component(). Driver shutdown() callback would 2252 * run too late, after device_shutdown() is already walking the 2253 * device list that component registration can modify. 2254 */ 2255 return register_reboot_notifier(&cs35l56_reboot_notifier); 2256 } 2257 module_init(cs35l56_modinit); 2258 2259 static void __exit cs35l56_modexit(void) 2260 { 2261 unregister_reboot_notifier(&cs35l56_reboot_notifier); 2262 } 2263 module_exit(cs35l56_modexit); 2264 2265 MODULE_DESCRIPTION("ASoC CS35L56 driver"); 2266 MODULE_IMPORT_NS("SND_SOC_CS35L56_SHARED"); 2267 MODULE_IMPORT_NS("SND_SOC_CS_AMP_LIB"); 2268 MODULE_AUTHOR("Richard Fitzgerald <rf@opensource.cirrus.com>"); 2269 MODULE_AUTHOR("Simon Trimmer <simont@opensource.cirrus.com>"); 2270 MODULE_LICENSE("GPL"); 2271