1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright (c) 2022, Analog Devices Inc.
3
4 #include <linux/module.h>
5 #include <linux/pm_runtime.h>
6 #include <linux/regmap.h>
7 #include <linux/soundwire/sdw.h>
8 #include <linux/soundwire/sdw_registers.h>
9 #include <linux/soundwire/sdw_type.h>
10 #include <sound/pcm.h>
11 #include <sound/pcm_params.h>
12 #include <sound/soc.h>
13 #include <sound/tlv.h>
14
15 #include "max98363.h"
16
17 static struct reg_default max98363_reg[] = {
18 {MAX98363_R2021_ERR_MON_CTRL, 0x0},
19 {MAX98363_R2022_SPK_MON_THRESH, 0x0},
20 {MAX98363_R2023_SPK_MON_DURATION, 0x0},
21 {MAX98363_R2030_TONE_GEN_CFG, 0x0},
22 {MAX98363_R203F_TONE_GEN_EN, 0x0},
23 {MAX98363_R2040_AMP_VOL, 0x0},
24 {MAX98363_R2041_AMP_GAIN, 0x5},
25 {MAX98363_R2042_DSP_CFG, 0x0},
26 };
27
max98363_readable_register(struct device * dev,unsigned int reg)28 static bool max98363_readable_register(struct device *dev, unsigned int reg)
29 {
30 switch (reg) {
31 case MAX98363_R2001_INTR_RAW:
32 case MAX98363_R2003_INTR_STATE:
33 case MAX98363_R2005_INTR_FALG:
34 case MAX98363_R2007_INTR_EN:
35 case MAX98363_R2009_INTR_CLR:
36 case MAX98363_R2021_ERR_MON_CTRL ... MAX98363_R2023_SPK_MON_DURATION:
37 case MAX98363_R2030_TONE_GEN_CFG:
38 case MAX98363_R203F_TONE_GEN_EN:
39 case MAX98363_R2040_AMP_VOL:
40 case MAX98363_R2041_AMP_GAIN:
41 case MAX98363_R2042_DSP_CFG:
42 case MAX98363_R21FF_REV_ID:
43 return true;
44 default:
45 return false;
46 }
47 };
48
max98363_volatile_reg(struct device * dev,unsigned int reg)49 static bool max98363_volatile_reg(struct device *dev, unsigned int reg)
50 {
51 switch (reg) {
52 case MAX98363_R2001_INTR_RAW:
53 case MAX98363_R2003_INTR_STATE:
54 case MAX98363_R2005_INTR_FALG:
55 case MAX98363_R2007_INTR_EN:
56 case MAX98363_R2009_INTR_CLR:
57 case MAX98363_R21FF_REV_ID:
58 return true;
59 default:
60 return false;
61 }
62 }
63
64 static const struct regmap_config max98363_sdw_regmap = {
65 .reg_bits = 32,
66 .val_bits = 8,
67 .max_register = MAX98363_R21FF_REV_ID,
68 .reg_defaults = max98363_reg,
69 .num_reg_defaults = ARRAY_SIZE(max98363_reg),
70 .readable_reg = max98363_readable_register,
71 .volatile_reg = max98363_volatile_reg,
72 .cache_type = REGCACHE_RBTREE,
73 .use_single_read = true,
74 .use_single_write = true,
75 };
76
max98363_suspend(struct device * dev)77 static int max98363_suspend(struct device *dev)
78 {
79 struct max98363_priv *max98363 = dev_get_drvdata(dev);
80
81 regcache_cache_only(max98363->regmap, true);
82 regcache_mark_dirty(max98363->regmap);
83
84 return 0;
85 }
86
87 #define MAX98363_PROBE_TIMEOUT 5000
88
max98363_resume(struct device * dev)89 static int max98363_resume(struct device *dev)
90 {
91 struct sdw_slave *slave = dev_to_sdw_dev(dev);
92 struct max98363_priv *max98363 = dev_get_drvdata(dev);
93 unsigned long time;
94
95 if (!max98363->first_hw_init)
96 return 0;
97
98 if (!slave->unattach_request)
99 goto regmap_sync;
100
101 time = wait_for_completion_timeout(&slave->initialization_complete,
102 msecs_to_jiffies(MAX98363_PROBE_TIMEOUT));
103 if (!time) {
104 dev_err(dev, "Initialization not complete, timed out\n");
105 return -ETIMEDOUT;
106 }
107
108 regmap_sync:
109
110 slave->unattach_request = 0;
111 regcache_cache_only(max98363->regmap, false);
112 regcache_sync(max98363->regmap);
113
114 return 0;
115 }
116
117 static DEFINE_RUNTIME_DEV_PM_OPS(max98363_pm, max98363_suspend, max98363_resume, NULL);
118
max98363_read_prop(struct sdw_slave * slave)119 static int max98363_read_prop(struct sdw_slave *slave)
120 {
121 struct sdw_slave_prop *prop = &slave->prop;
122 int nval, i;
123 u32 bit;
124 unsigned long addr;
125 struct sdw_dpn_prop *dpn;
126
127 prop->scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
128
129 /* BITMAP: 00000010 Dataport 1 is active */
130 prop->sink_ports = BIT(1);
131 prop->paging_support = true;
132 prop->clk_stop_timeout = 20;
133 prop->simple_clk_stop_capable = true;
134 prop->clock_reg_supported = true;
135
136 nval = hweight32(prop->sink_ports);
137 prop->sink_dpn_prop = devm_kcalloc(&slave->dev, nval,
138 sizeof(*prop->sink_dpn_prop),
139 GFP_KERNEL);
140 if (!prop->sink_dpn_prop)
141 return -ENOMEM;
142
143 i = 0;
144 dpn = prop->sink_dpn_prop;
145 addr = prop->sink_ports;
146 for_each_set_bit(bit, &addr, 32) {
147 dpn[i].num = bit;
148 dpn[i].type = SDW_DPN_FULL;
149 dpn[i].simple_ch_prep_sm = true;
150 dpn[i].ch_prep_timeout = 10;
151 i++;
152 }
153
154 return 0;
155 }
156
max98363_io_init(struct sdw_slave * slave)157 static int max98363_io_init(struct sdw_slave *slave)
158 {
159 struct device *dev = &slave->dev;
160 struct max98363_priv *max98363 = dev_get_drvdata(dev);
161 int ret, reg;
162
163 regcache_cache_only(max98363->regmap, false);
164 if (max98363->first_hw_init)
165 regcache_cache_bypass(max98363->regmap, true);
166
167 /*
168 * PM runtime status is marked as 'active' only when a Slave reports as Attached
169 */
170 if (!max98363->first_hw_init)
171 /* update count of parent 'active' children */
172 pm_runtime_set_active(dev);
173
174 pm_runtime_get_noresume(dev);
175
176 ret = regmap_read(max98363->regmap, MAX98363_R21FF_REV_ID, ®);
177 if (!ret)
178 dev_info(dev, "Revision ID: %X\n", reg);
179 else
180 goto out;
181
182 if (max98363->first_hw_init) {
183 regcache_cache_bypass(max98363->regmap, false);
184 regcache_mark_dirty(max98363->regmap);
185 }
186
187 max98363->first_hw_init = true;
188 max98363->hw_init = true;
189
190 out:
191 pm_runtime_mark_last_busy(dev);
192 pm_runtime_put_autosuspend(dev);
193
194 return ret;
195 }
196
197 #define MAX98363_RATES SNDRV_PCM_RATE_8000_192000
198 #define MAX98363_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE)
199
max98363_sdw_dai_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)200 static int max98363_sdw_dai_hw_params(struct snd_pcm_substream *substream,
201 struct snd_pcm_hw_params *params,
202 struct snd_soc_dai *dai)
203 {
204 struct snd_soc_component *component = dai->component;
205 struct max98363_priv *max98363 =
206 snd_soc_component_get_drvdata(component);
207
208 struct sdw_stream_config stream_config;
209 struct sdw_port_config port_config;
210 enum sdw_data_direction direction;
211 struct sdw_stream_runtime *stream;
212 struct snd_pcm_runtime *runtime = substream->runtime;
213
214 int ret;
215
216 stream = snd_soc_dai_get_dma_data(dai, substream);
217
218 if (!stream)
219 return -EINVAL;
220
221 if (!max98363->slave)
222 return -EINVAL;
223
224 if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
225 return -EINVAL;
226
227 direction = SDW_DATA_DIR_RX;
228 port_config.num = 1;
229
230 stream_config.frame_rate = params_rate(params);
231 stream_config.bps = snd_pcm_format_width(params_format(params));
232 stream_config.direction = direction;
233 stream_config.ch_count = 1;
234
235 if (stream_config.ch_count > runtime->hw.channels_max) {
236 stream_config.ch_count = runtime->hw.channels_max;
237 dev_info(dai->dev, "Number of channels: %d (requested: %d)\n",
238 stream_config.ch_count, params_channels(params));
239 }
240 port_config.ch_mask = GENMASK((int)stream_config.ch_count - 1, 0);
241
242 ret = sdw_stream_add_slave(max98363->slave, &stream_config,
243 &port_config, 1, stream);
244 if (ret) {
245 dev_err(dai->dev, "Unable to configure port\n");
246 return ret;
247 }
248
249 dev_dbg(component->dev, "Format supported %d", params_format(params));
250
251 return 0;
252 }
253
max98363_pcm_hw_free(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)254 static int max98363_pcm_hw_free(struct snd_pcm_substream *substream,
255 struct snd_soc_dai *dai)
256 {
257 struct snd_soc_component *component = dai->component;
258 struct max98363_priv *max98363 =
259 snd_soc_component_get_drvdata(component);
260 struct sdw_stream_runtime *stream =
261 snd_soc_dai_get_dma_data(dai, substream);
262
263 if (!max98363->slave)
264 return -EINVAL;
265
266 sdw_stream_remove_slave(max98363->slave, stream);
267
268 return 0;
269 }
270
max98363_set_sdw_stream(struct snd_soc_dai * dai,void * sdw_stream,int direction)271 static int max98363_set_sdw_stream(struct snd_soc_dai *dai,
272 void *sdw_stream, int direction)
273 {
274 snd_soc_dai_dma_data_set(dai, direction, sdw_stream);
275
276 return 0;
277 }
278
279 static const struct snd_soc_dai_ops max98363_dai_sdw_ops = {
280 .hw_params = max98363_sdw_dai_hw_params,
281 .hw_free = max98363_pcm_hw_free,
282 .set_stream = max98363_set_sdw_stream,
283 };
284
285 static struct snd_soc_dai_driver max98363_dai[] = {
286 {
287 .name = "max98363-aif1",
288 .playback = {
289 .stream_name = "HiFi Playback",
290 .channels_min = 1,
291 .channels_max = 1,
292 .rates = MAX98363_RATES,
293 .formats = MAX98363_FORMATS,
294 },
295 .ops = &max98363_dai_sdw_ops,
296 }
297 };
298
max98363_update_status(struct sdw_slave * slave,enum sdw_slave_status status)299 static int max98363_update_status(struct sdw_slave *slave,
300 enum sdw_slave_status status)
301 {
302 struct max98363_priv *max98363 = dev_get_drvdata(&slave->dev);
303
304 if (status == SDW_SLAVE_UNATTACHED)
305 max98363->hw_init = false;
306
307 /*
308 * Perform initialization only if slave status is SDW_SLAVE_ATTACHED
309 */
310 if (max98363->hw_init || status != SDW_SLAVE_ATTACHED)
311 return 0;
312
313 /* perform I/O transfers required for Slave initialization */
314 return max98363_io_init(slave);
315 }
316
317 static struct sdw_slave_ops max98363_slave_ops = {
318 .read_prop = max98363_read_prop,
319 .update_status = max98363_update_status,
320 };
321
322 static DECLARE_TLV_DB_SCALE(max98363_digital_tlv, -6350, 50, 1);
323 static const DECLARE_TLV_DB_RANGE(max98363_spk_tlv,
324 0, 5, TLV_DB_SCALE_ITEM(-300, 300, 0),
325 );
326
327 static const char * const max98363_tone_cfg_text[] = {
328 "Reserved", "0", "+FS/2", "-FS/2", "1KHz",
329 "12KHz", "8KHz", "6KHz", "4KHz", "3KHz",
330 "2KHz", "1.5KHz", "Reserved", "500Hz", "250Hz"
331 };
332
333 static SOC_ENUM_SINGLE_DECL(max98363_tone_cfg_enum,
334 MAX98363_R2030_TONE_GEN_CFG, 0,
335 max98363_tone_cfg_text);
336
337 static const char * const max98363_spkmon_duration_text[] = {
338 "8ms", "20ms", "40ms", "60ms",
339 "80ms", "160ms", "240ms", "320ms",
340 "400ms", "480ms", "560ms", "640ms",
341 "720ms", "800ms", "880ms", "960ms"
342 };
343
344 static SOC_ENUM_SINGLE_DECL(max98363_spkmon_duration_enum,
345 MAX98363_R2023_SPK_MON_DURATION, 0,
346 max98363_spkmon_duration_text);
347
348 static const struct snd_kcontrol_new max98363_snd_controls[] = {
349 SOC_SINGLE_TLV("Digital Volume", MAX98363_R2040_AMP_VOL,
350 0, 0x7F, 1, max98363_digital_tlv),
351 SOC_SINGLE_TLV("Speaker Volume", MAX98363_R2041_AMP_GAIN,
352 0, 10, 0, max98363_spk_tlv),
353 SOC_SINGLE("Tone Generator Switch", MAX98363_R203F_TONE_GEN_EN,
354 0, 1, 0),
355 SOC_ENUM("Tone Config", max98363_tone_cfg_enum),
356 SOC_SINGLE("Ramp Switch", MAX98363_R2042_DSP_CFG,
357 MAX98363_AMP_DSP_CFG_RMP_SHIFT, 1, 0),
358 SOC_SINGLE("CLK Monitor Switch", MAX98363_R2021_ERR_MON_CTRL,
359 MAX98363_CLOCK_MON_SHIFT, 1, 0),
360 SOC_SINGLE("SPKMON Monitor Switch", MAX98363_R2021_ERR_MON_CTRL,
361 MAX98363_SPKMON_SHIFT, 1, 0),
362 SOC_SINGLE("SPKMON Thresh", MAX98363_R2022_SPK_MON_THRESH, 0, 0xFF, 0),
363 SOC_ENUM("SPKMON Duration", max98363_spkmon_duration_enum),
364 };
365
366 static const struct snd_soc_dapm_widget max98363_dapm_widgets[] = {
367 SND_SOC_DAPM_AIF_IN("AIFIN", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
368 SND_SOC_DAPM_OUTPUT("BE_OUT"),
369 };
370
371 static const struct snd_soc_dapm_route max98363_audio_map[] = {
372 /* Plabyack */
373 {"BE_OUT", NULL, "AIFIN"},
374 };
375
376 static const struct snd_soc_component_driver soc_codec_dev_max98363 = {
377 .controls = max98363_snd_controls,
378 .num_controls = ARRAY_SIZE(max98363_snd_controls),
379 .dapm_widgets = max98363_dapm_widgets,
380 .num_dapm_widgets = ARRAY_SIZE(max98363_dapm_widgets),
381 .dapm_routes = max98363_audio_map,
382 .num_dapm_routes = ARRAY_SIZE(max98363_audio_map),
383 .use_pmdown_time = 1,
384 .endianness = 1,
385 };
386
max98363_init(struct sdw_slave * slave,struct regmap * regmap)387 static int max98363_init(struct sdw_slave *slave, struct regmap *regmap)
388 {
389 struct max98363_priv *max98363;
390 int ret;
391 struct device *dev = &slave->dev;
392
393 /* Allocate and assign private driver data structure */
394 max98363 = devm_kzalloc(dev, sizeof(*max98363), GFP_KERNEL);
395 if (!max98363)
396 return -ENOMEM;
397
398 dev_set_drvdata(dev, max98363);
399 max98363->regmap = regmap;
400 max98363->slave = slave;
401
402 regcache_cache_only(max98363->regmap, true);
403
404 max98363->hw_init = false;
405 max98363->first_hw_init = false;
406
407 /* codec registration */
408 ret = devm_snd_soc_register_component(dev, &soc_codec_dev_max98363,
409 max98363_dai,
410 ARRAY_SIZE(max98363_dai));
411 if (ret < 0) {
412 dev_err(dev, "Failed to register codec: %d\n", ret);
413 return ret;
414 }
415
416 /* set autosuspend parameters */
417 pm_runtime_set_autosuspend_delay(dev, 3000);
418 pm_runtime_use_autosuspend(dev);
419
420 /* make sure the device does not suspend immediately */
421 pm_runtime_mark_last_busy(dev);
422
423 pm_runtime_enable(dev);
424
425 /* important note: the device is NOT tagged as 'active' and will remain
426 * 'suspended' until the hardware is enumerated/initialized. This is required
427 * to make sure the ASoC framework use of pm_runtime_get_sync() does not silently
428 * fail with -EACCESS because of race conditions between card creation and enumeration
429 */
430 return 0;
431 }
432
max98363_sdw_probe(struct sdw_slave * slave,const struct sdw_device_id * id)433 static int max98363_sdw_probe(struct sdw_slave *slave,
434 const struct sdw_device_id *id)
435 {
436 struct regmap *regmap;
437
438 /* Regmap Initialization */
439 regmap = devm_regmap_init_sdw(slave, &max98363_sdw_regmap);
440 if (IS_ERR(regmap))
441 return PTR_ERR(regmap);
442
443 return max98363_init(slave, regmap);
444 }
445
446 static const struct sdw_device_id max98363_id[] = {
447 SDW_SLAVE_ENTRY(0x019F, 0x8363, 0),
448 {},
449 };
450 MODULE_DEVICE_TABLE(sdw, max98363_id);
451
452 static struct sdw_driver max98363_sdw_driver = {
453 .driver = {
454 .name = "max98363",
455 .pm = pm_ptr(&max98363_pm),
456 },
457 .probe = max98363_sdw_probe,
458 .ops = &max98363_slave_ops,
459 .id_table = max98363_id,
460 };
461
462 module_sdw_driver(max98363_sdw_driver);
463
464 MODULE_DESCRIPTION("ASoC MAX98363 driver SDW");
465 MODULE_AUTHOR("Ryan Lee <ryans.lee@analog.com>");
466 MODULE_LICENSE("GPL");
467