1 // SPDX-License-Identifier: GPL-2.0-only
2 // cs42l42-sdw.c -- CS42L42 ALSA SoC audio driver SoundWire driver
55 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(dai->component);  in cs42l42_sdw_dai_startup()
57 	if (!cs42l42->init_done)  in cs42l42_sdw_dai_startup()
58 		return -ENODEV;  in cs42l42_sdw_dai_startup()
67 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(dai->component);  in cs42l42_sdw_dai_hw_params()
74 		return -EINVAL;  in cs42l42_sdw_dai_hw_params()
77 	cs42l42->sample_rate = params_rate(params);  in cs42l42_sdw_dai_hw_params()
81 	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)  in cs42l42_sdw_dai_hw_params()
82 		port_config.num = CS42L42_SDW_PLAYBACK_PORT;  in cs42l42_sdw_dai_hw_params()
84 		port_config.num = CS42L42_SDW_CAPTURE_PORT;  in cs42l42_sdw_dai_hw_params()
86 	ret = sdw_stream_add_slave(cs42l42->sdw_peripheral, &stream_config, &port_config, 1,  in cs42l42_sdw_dai_hw_params()
89 		dev_err(dai->dev, "Failed to add sdw stream: %d\n", ret);  in cs42l42_sdw_dai_hw_params()
93 	cs42l42_src_config(dai->component, params_rate(params));  in cs42l42_sdw_dai_hw_params()
101 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(dai->component);  in cs42l42_sdw_dai_prepare()
103 	dev_dbg(dai->dev, "dai_prepare: sclk=%u rate=%u\n", cs42l42->sclk, cs42l42->sample_rate);  in cs42l42_sdw_dai_prepare()
105 	if (!cs42l42->sclk || !cs42l42->sample_rate)  in cs42l42_sdw_dai_prepare()
106 		return -EINVAL;  in cs42l42_sdw_dai_prepare()
114 	return cs42l42_pll_config(dai->component, cs42l42->sclk, cs42l42->sample_rate);  in cs42l42_sdw_dai_prepare()
120 	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(dai->component);  in cs42l42_sdw_dai_hw_free()
123 	sdw_stream_remove_slave(cs42l42->sdw_peripheral, sdw_stream);  in cs42l42_sdw_dai_hw_free()
124 	cs42l42->sample_rate = 0;  in cs42l42_sdw_dai_hw_free()
133 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&slave->dev);  in cs42l42_sdw_port_prep()
136 	if (prepare_ch->num == CS42L42_SDW_PLAYBACK_PORT)  in cs42l42_sdw_port_prep()
142 		dev_dbg(cs42l42->dev, "Prep Port pdn_mask:%x\n", pdn_mask);  in cs42l42_sdw_port_prep()
143 		regmap_clear_bits(cs42l42->regmap, CS42L42_PWR_CTL1, pdn_mask);  in cs42l42_sdw_port_prep()
146 		dev_dbg(cs42l42->dev, "Deprep Port pdn_mask:%x\n", pdn_mask);  in cs42l42_sdw_port_prep()
147 		regmap_set_bits(cs42l42->regmap, CS42L42_PWR_CTL1, pdn_mask);  in cs42l42_sdw_port_prep()
178 	.name = "cs42l42-sdw",
215 		dev_err(&peripheral->dev, "MEM_ACCESS_STATUS & %#x for %#x fail: %d\n",  in cs42l42_sdw_poll_status()
235 		dev_err(&peripheral->dev, "Failed to issue read @0x%x: %d\n", reg, ret);  in cs42l42_sdw_read()
239 	data = (u8)ret;	/* possible non-delayed read value */  in cs42l42_sdw_read()
242 		dev_err(&peripheral->dev, "Failed to read MEM_ACCESS_STATUS: %d\n", ret);  in cs42l42_sdw_read()
262 		dev_err(&peripheral->dev, "Failed to read READ_DATA: %d\n", ret);  in cs42l42_sdw_read()
283 /* Initialise cs42l42 using SoundWire - this is only called once, during initialisation */
286 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&peripheral->dev);  in cs42l42_sdw_init()
289 	regcache_cache_only(cs42l42->regmap, false);  in cs42l42_sdw_init()
293 		regcache_cache_only(cs42l42->regmap, true);  in cs42l42_sdw_init()
298 	ret = regcache_sync(cs42l42->regmap);  in cs42l42_sdw_init()
300 		dev_warn(cs42l42->dev, "Failed to sync cache: %d\n", ret);  in cs42l42_sdw_init()
302 	/* Disable internal logic that makes clock-stop conditional */  in cs42l42_sdw_init()
303 	regmap_clear_bits(cs42l42->regmap, CS42L42_PWR_CTL3, CS42L42_SW_CLK_STP_STAT_SEL_MASK);  in cs42l42_sdw_init()
307 	pm_runtime_put_autosuspend(cs42l42->dev);  in cs42l42_sdw_init()
312 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&peripheral->dev);  in cs42l42_sdw_read_prop()
313 	struct sdw_slave_prop *prop = &peripheral->prop;  in cs42l42_sdw_read_prop()
314 	struct sdw_dpn_prop *ports;  in cs42l42_sdw_read_prop()  local
316 	ports = devm_kcalloc(cs42l42->dev, 2, sizeof(*ports), GFP_KERNEL);  in cs42l42_sdw_read_prop()
317 	if (!ports)  in cs42l42_sdw_read_prop()
318 		return -ENOMEM;  in cs42l42_sdw_read_prop()
320 	prop->source_ports = BIT(CS42L42_SDW_CAPTURE_PORT);  in cs42l42_sdw_read_prop()
321 	prop->sink_ports = BIT(CS42L42_SDW_PLAYBACK_PORT);  in cs42l42_sdw_read_prop()
322 	prop->quirks = SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY;  in cs42l42_sdw_read_prop()
323 	prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;  in cs42l42_sdw_read_prop()
325 	/* DP1 - capture */  in cs42l42_sdw_read_prop()
326 	ports[0].num = CS42L42_SDW_CAPTURE_PORT,  in cs42l42_sdw_read_prop()
327 	ports[0].type = SDW_DPN_FULL,  in cs42l42_sdw_read_prop()
328 	ports[0].ch_prep_timeout = 10,  in cs42l42_sdw_read_prop()
329 	prop->src_dpn_prop = &ports[0];  in cs42l42_sdw_read_prop()
331 	/* DP2 - playback */  in cs42l42_sdw_read_prop()
332 	ports[1].num = CS42L42_SDW_PLAYBACK_PORT,  in cs42l42_sdw_read_prop()
333 	ports[1].type = SDW_DPN_FULL,  in cs42l42_sdw_read_prop()
334 	ports[1].ch_prep_timeout = 10,  in cs42l42_sdw_read_prop()
335 	prop->sink_dpn_prop = &ports[1];  in cs42l42_sdw_read_prop()
343 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&peripheral->dev);  in cs42l42_sdw_update_status()
347 		dev_dbg(cs42l42->dev, "ATTACHED\n");  in cs42l42_sdw_update_status()
351 		 * if we hard-reset CS42L42 in probe() but it had already been  in cs42l42_sdw_update_status()
355 		if (cs42l42->sdw_waiting_first_unattach)  in cs42l42_sdw_update_status()
360 		 * When resuming from suspend, resume callback will handle re-init of codec,  in cs42l42_sdw_update_status()
363 		if (!cs42l42->init_done)  in cs42l42_sdw_update_status()
367 		dev_dbg(cs42l42->dev, "UNATTACHED\n");  in cs42l42_sdw_update_status()
369 		if (cs42l42->sdw_waiting_first_unattach) {  in cs42l42_sdw_update_status()
374 			cs42l42->sdw_waiting_first_unattach = false;  in cs42l42_sdw_update_status()
375 			gpiod_set_value_cansleep(cs42l42->reset_gpio, 1);  in cs42l42_sdw_update_status()
389 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&peripheral->dev);  in cs42l42_sdw_bus_config()
390 	unsigned int new_sclk = params->curr_dr_freq / 2;  in cs42l42_sdw_bus_config()
393 	if ((new_sclk != cs42l42->sclk) && cs42l42->stream_use) {  in cs42l42_sdw_bus_config()
394 		dev_warn(cs42l42->dev, "Rejected SCLK change while audio active\n");  in cs42l42_sdw_bus_config()
395 		return -EBUSY;  in cs42l42_sdw_bus_config()
398 	cs42l42->sclk = new_sclk;  in cs42l42_sdw_bus_config()
400 	dev_dbg(cs42l42->dev, "bus_config: sclk=%u c=%u r=%u\n",  in cs42l42_sdw_bus_config()
401 		cs42l42->sclk, params->col, params->row);  in cs42l42_sdw_bus_config()
420 	if (!cs42l42->init_done)  in cs42l42_sdw_runtime_suspend()
424 	regcache_cache_only(cs42l42->regmap, true);  in cs42l42_sdw_runtime_suspend()
435 	struct sdw_slave *peripheral = cs42l42->sdw_peripheral;  in cs42l42_sdw_handle_unattach()
437 	if (!peripheral->unattach_request)  in cs42l42_sdw_handle_unattach()
440 	/* Cannot access registers until master re-attaches. */  in cs42l42_sdw_handle_unattach()
441 	dev_dbg(&peripheral->dev, "Wait for initialization_complete\n");  in cs42l42_sdw_handle_unattach()
442 	if (!wait_for_completion_timeout(&peripheral->initialization_complete,  in cs42l42_sdw_handle_unattach()
444 		dev_err(&peripheral->dev, "initialization_complete timed out\n");  in cs42l42_sdw_handle_unattach()
445 		return -ETIMEDOUT;  in cs42l42_sdw_handle_unattach()
448 	peripheral->unattach_request = 0;  in cs42l42_sdw_handle_unattach()
454 	regmap_multi_reg_write_bypassed(cs42l42->regmap,  in cs42l42_sdw_handle_unattach()
458 	regcache_mark_dirty(cs42l42->regmap);  in cs42l42_sdw_handle_unattach()
472 	if (!cs42l42->init_done)  in cs42l42_sdw_runtime_resume()
479 		dbnce = max(cs42l42->ts_dbnc_rise, cs42l42->ts_dbnc_fall);  in cs42l42_sdw_runtime_resume()
485 	regcache_cache_only(cs42l42->regmap, false);  in cs42l42_sdw_runtime_resume()
488 	regcache_sync_region(cs42l42->regmap, CS42L42_MIC_DET_CTL1, CS42L42_MIC_DET_CTL1);  in cs42l42_sdw_runtime_resume()
489 	regcache_sync(cs42l42->regmap);  in cs42l42_sdw_runtime_resume()
501 	/* Power-up so it can re-enumerate */  in cs42l42_sdw_resume()
506 	/* Wait for re-attach */  in cs42l42_sdw_resume()
519 	struct device *dev = &peripheral->dev;  in cs42l42_sdw_probe()
527 		return -ENOMEM;  in cs42l42_sdw_probe()
532 		irq = of_irq_get(dev->of_node, 0);  in cs42l42_sdw_probe()
534 	if (irq == -ENOENT)  in cs42l42_sdw_probe()
541 		return -ENOMEM;  in cs42l42_sdw_probe()
542 	regmap_conf->reg_bits = 16;  in cs42l42_sdw_probe()
543 	regmap_conf->num_ranges = 0;  in cs42l42_sdw_probe()
544 	regmap_conf->reg_read = cs42l42_sdw_read;  in cs42l42_sdw_probe()
545 	regmap_conf->reg_write = cs42l42_sdw_write;  in cs42l42_sdw_probe()
551 	/* Start in cache-only until device is enumerated */  in cs42l42_sdw_probe()
559 		return -ENOMEM;  in cs42l42_sdw_probe()
561 	component_drv->dapm_routes = cs42l42_sdw_audio_map;  in cs42l42_sdw_probe()
562 	component_drv->num_dapm_routes = ARRAY_SIZE(cs42l42_sdw_audio_map);  in cs42l42_sdw_probe()
564 	cs42l42->dev = dev;  in cs42l42_sdw_probe()
565 	cs42l42->regmap = regmap;  in cs42l42_sdw_probe()
566 	cs42l42->sdw_peripheral = peripheral;  in cs42l42_sdw_probe()
567 	cs42l42->irq = irq;  in cs42l42_sdw_probe()
568 	cs42l42->devid = CS42L42_CHIP_ID;  in cs42l42_sdw_probe()
574 	pm_runtime_set_autosuspend_delay(cs42l42->dev, 3000);  in cs42l42_sdw_probe()
575 	pm_runtime_use_autosuspend(cs42l42->dev);  in cs42l42_sdw_probe()
576 	pm_runtime_mark_last_busy(cs42l42->dev);  in cs42l42_sdw_probe()
577 	pm_runtime_set_active(cs42l42->dev);  in cs42l42_sdw_probe()
578 	pm_runtime_get_noresume(cs42l42->dev);  in cs42l42_sdw_probe()
579 	pm_runtime_enable(cs42l42->dev);  in cs42l42_sdw_probe()
590 	struct cs42l42_private *cs42l42 = dev_get_drvdata(&peripheral->dev);  in cs42l42_sdw_remove()
593 	pm_runtime_disable(cs42l42->dev);  in cs42l42_sdw_remove()
611 		.name = "cs42l42-sdw",