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157b68ba AD |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * ALSA SoC Texas Instruments TAS6424 Quad-Channel Audio Amplifier | |
4 | * | |
5 | * Copyright (C) 2016-2017 Texas Instruments Incorporated - http://www.ti.com/ | |
6 | * Author: Andreas Dannenberg <dannenberg@ti.com> | |
7 | * Andrew F. Davis <afd@ti.com> | |
8 | */ | |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/errno.h> | |
12 | #include <linux/device.h> | |
13 | #include <linux/i2c.h> | |
14 | #include <linux/pm_runtime.h> | |
15 | #include <linux/regmap.h> | |
16 | #include <linux/slab.h> | |
17 | #include <linux/regulator/consumer.h> | |
18 | #include <linux/delay.h> | |
e3976aa6 | 19 | #include <linux/gpio/consumer.h> |
157b68ba AD |
20 | |
21 | #include <sound/pcm.h> | |
22 | #include <sound/pcm_params.h> | |
23 | #include <sound/soc.h> | |
24 | #include <sound/soc-dapm.h> | |
25 | #include <sound/tlv.h> | |
26 | ||
27 | #include "tas6424.h" | |
28 | ||
29 | /* Define how often to check (and clear) the fault status register (in ms) */ | |
30 | #define TAS6424_FAULT_CHECK_INTERVAL 200 | |
31 | ||
32 | static const char * const tas6424_supply_names[] = { | |
33 | "dvdd", /* Digital power supply. Connect to 3.3-V supply. */ | |
34 | "vbat", /* Supply used for higher voltage analog circuits. */ | |
35 | "pvdd", /* Class-D amp output FETs supply. */ | |
36 | }; | |
37 | #define TAS6424_NUM_SUPPLIES ARRAY_SIZE(tas6424_supply_names) | |
38 | ||
39 | struct tas6424_data { | |
40 | struct device *dev; | |
41 | struct regmap *regmap; | |
42 | struct regulator_bulk_data supplies[TAS6424_NUM_SUPPLIES]; | |
43 | struct delayed_work fault_check_work; | |
5fb6589a | 44 | unsigned int last_cfault; |
157b68ba AD |
45 | unsigned int last_fault1; |
46 | unsigned int last_fault2; | |
47 | unsigned int last_warn; | |
e3976aa6 | 48 | struct gpio_desc *standby_gpio; |
e969a6d2 | 49 | struct gpio_desc *mute_gpio; |
157b68ba AD |
50 | }; |
51 | ||
52 | /* | |
53 | * DAC digital volumes. From -103.5 to 24 dB in 0.5 dB steps. Note that | |
54 | * setting the gain below -100 dB (register value <0x7) is effectively a MUTE | |
55 | * as per device datasheet. | |
56 | */ | |
57 | static DECLARE_TLV_DB_SCALE(dac_tlv, -10350, 50, 0); | |
58 | ||
59 | static const struct snd_kcontrol_new tas6424_snd_controls[] = { | |
60 | SOC_SINGLE_TLV("Speaker Driver CH1 Playback Volume", | |
61 | TAS6424_CH1_VOL_CTRL, 0, 0xff, 0, dac_tlv), | |
62 | SOC_SINGLE_TLV("Speaker Driver CH2 Playback Volume", | |
63 | TAS6424_CH2_VOL_CTRL, 0, 0xff, 0, dac_tlv), | |
64 | SOC_SINGLE_TLV("Speaker Driver CH3 Playback Volume", | |
65 | TAS6424_CH3_VOL_CTRL, 0, 0xff, 0, dac_tlv), | |
66 | SOC_SINGLE_TLV("Speaker Driver CH4 Playback Volume", | |
67 | TAS6424_CH4_VOL_CTRL, 0, 0xff, 0, dac_tlv), | |
39688877 JJH |
68 | SOC_SINGLE_STROBE("Auto Diagnostics Switch", TAS6424_DC_DIAG_CTRL1, |
69 | TAS6424_LDGBYPASS_SHIFT, 1), | |
157b68ba AD |
70 | }; |
71 | ||
72 | static int tas6424_dac_event(struct snd_soc_dapm_widget *w, | |
73 | struct snd_kcontrol *kcontrol, int event) | |
74 | { | |
fbf3c936 KM |
75 | struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); |
76 | struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component); | |
157b68ba | 77 | |
fbf3c936 | 78 | dev_dbg(component->dev, "%s() event=0x%0x\n", __func__, event); |
157b68ba AD |
79 | |
80 | if (event & SND_SOC_DAPM_POST_PMU) { | |
81 | /* Observe codec shutdown-to-active time */ | |
82 | msleep(12); | |
83 | ||
84 | /* Turn on TAS6424 periodic fault checking/handling */ | |
85 | tas6424->last_fault1 = 0; | |
86 | tas6424->last_fault2 = 0; | |
87 | tas6424->last_warn = 0; | |
88 | schedule_delayed_work(&tas6424->fault_check_work, | |
89 | msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); | |
90 | } else if (event & SND_SOC_DAPM_PRE_PMD) { | |
91 | /* Disable TAS6424 periodic fault checking/handling */ | |
92 | cancel_delayed_work_sync(&tas6424->fault_check_work); | |
93 | } | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static const struct snd_soc_dapm_widget tas6424_dapm_widgets[] = { | |
99 | SND_SOC_DAPM_AIF_IN("DAC IN", "Playback", 0, SND_SOC_NOPM, 0, 0), | |
100 | SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas6424_dac_event, | |
101 | SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD), | |
102 | SND_SOC_DAPM_OUTPUT("OUT") | |
103 | }; | |
104 | ||
105 | static const struct snd_soc_dapm_route tas6424_audio_map[] = { | |
106 | { "DAC", NULL, "DAC IN" }, | |
107 | { "OUT", NULL, "DAC" }, | |
108 | }; | |
109 | ||
110 | static int tas6424_hw_params(struct snd_pcm_substream *substream, | |
111 | struct snd_pcm_hw_params *params, | |
112 | struct snd_soc_dai *dai) | |
113 | { | |
fbf3c936 | 114 | struct snd_soc_component *component = dai->component; |
157b68ba AD |
115 | unsigned int rate = params_rate(params); |
116 | unsigned int width = params_width(params); | |
117 | u8 sap_ctrl = 0; | |
118 | ||
fbf3c936 | 119 | dev_dbg(component->dev, "%s() rate=%u width=%u\n", __func__, rate, width); |
157b68ba AD |
120 | |
121 | switch (rate) { | |
122 | case 44100: | |
123 | sap_ctrl |= TAS6424_SAP_RATE_44100; | |
124 | break; | |
125 | case 48000: | |
126 | sap_ctrl |= TAS6424_SAP_RATE_48000; | |
127 | break; | |
128 | case 96000: | |
129 | sap_ctrl |= TAS6424_SAP_RATE_96000; | |
130 | break; | |
131 | default: | |
fbf3c936 | 132 | dev_err(component->dev, "unsupported sample rate: %u\n", rate); |
157b68ba AD |
133 | return -EINVAL; |
134 | } | |
135 | ||
136 | switch (width) { | |
137 | case 16: | |
138 | sap_ctrl |= TAS6424_SAP_TDM_SLOT_SZ_16; | |
139 | break; | |
140 | case 24: | |
141 | break; | |
142 | default: | |
fbf3c936 | 143 | dev_err(component->dev, "unsupported sample width: %u\n", width); |
157b68ba AD |
144 | return -EINVAL; |
145 | } | |
146 | ||
fbf3c936 | 147 | snd_soc_component_update_bits(component, TAS6424_SAP_CTRL, |
157b68ba AD |
148 | TAS6424_SAP_RATE_MASK | |
149 | TAS6424_SAP_TDM_SLOT_SZ_16, | |
150 | sap_ctrl); | |
151 | ||
152 | return 0; | |
153 | } | |
154 | ||
155 | static int tas6424_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt) | |
156 | { | |
fbf3c936 | 157 | struct snd_soc_component *component = dai->component; |
157b68ba AD |
158 | u8 serial_format = 0; |
159 | ||
fbf3c936 | 160 | dev_dbg(component->dev, "%s() fmt=0x%0x\n", __func__, fmt); |
157b68ba AD |
161 | |
162 | /* clock masters */ | |
163 | switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { | |
164 | case SND_SOC_DAIFMT_CBS_CFS: | |
165 | break; | |
166 | default: | |
fbf3c936 | 167 | dev_err(component->dev, "Invalid DAI master/slave interface\n"); |
157b68ba AD |
168 | return -EINVAL; |
169 | } | |
170 | ||
171 | /* signal polarity */ | |
172 | switch (fmt & SND_SOC_DAIFMT_INV_MASK) { | |
173 | case SND_SOC_DAIFMT_NB_NF: | |
174 | break; | |
175 | default: | |
fbf3c936 | 176 | dev_err(component->dev, "Invalid DAI clock signal polarity\n"); |
157b68ba AD |
177 | return -EINVAL; |
178 | } | |
179 | ||
180 | /* interface format */ | |
181 | switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { | |
182 | case SND_SOC_DAIFMT_I2S: | |
183 | serial_format |= TAS6424_SAP_I2S; | |
184 | break; | |
185 | case SND_SOC_DAIFMT_DSP_A: | |
186 | serial_format |= TAS6424_SAP_DSP; | |
187 | break; | |
188 | case SND_SOC_DAIFMT_DSP_B: | |
189 | /* | |
190 | * We can use the fact that the TAS6424 does not care about the | |
191 | * LRCLK duty cycle during TDM to receive DSP_B formatted data | |
192 | * in LEFTJ mode (no delaying of the 1st data bit). | |
193 | */ | |
194 | serial_format |= TAS6424_SAP_LEFTJ; | |
195 | break; | |
196 | case SND_SOC_DAIFMT_LEFT_J: | |
197 | serial_format |= TAS6424_SAP_LEFTJ; | |
198 | break; | |
199 | default: | |
fbf3c936 | 200 | dev_err(component->dev, "Invalid DAI interface format\n"); |
157b68ba AD |
201 | return -EINVAL; |
202 | } | |
203 | ||
fbf3c936 | 204 | snd_soc_component_update_bits(component, TAS6424_SAP_CTRL, |
157b68ba AD |
205 | TAS6424_SAP_FMT_MASK, serial_format); |
206 | ||
207 | return 0; | |
208 | } | |
209 | ||
210 | static int tas6424_set_dai_tdm_slot(struct snd_soc_dai *dai, | |
211 | unsigned int tx_mask, unsigned int rx_mask, | |
212 | int slots, int slot_width) | |
213 | { | |
fbf3c936 | 214 | struct snd_soc_component *component = dai->component; |
157b68ba AD |
215 | unsigned int first_slot, last_slot; |
216 | bool sap_tdm_slot_last; | |
217 | ||
fbf3c936 | 218 | dev_dbg(component->dev, "%s() tx_mask=%d rx_mask=%d\n", __func__, |
157b68ba AD |
219 | tx_mask, rx_mask); |
220 | ||
221 | if (!tx_mask || !rx_mask) | |
222 | return 0; /* nothing needed to disable TDM mode */ | |
223 | ||
224 | /* | |
225 | * Determine the first slot and last slot that is being requested so | |
226 | * we'll be able to more easily enforce certain constraints as the | |
227 | * TAS6424's TDM interface is not fully configurable. | |
228 | */ | |
229 | first_slot = __ffs(tx_mask); | |
230 | last_slot = __fls(rx_mask); | |
231 | ||
232 | if (last_slot - first_slot != 4) { | |
fbf3c936 | 233 | dev_err(component->dev, "tdm mask must cover 4 contiguous slots\n"); |
157b68ba AD |
234 | return -EINVAL; |
235 | } | |
236 | ||
237 | switch (first_slot) { | |
238 | case 0: | |
239 | sap_tdm_slot_last = false; | |
240 | break; | |
241 | case 4: | |
242 | sap_tdm_slot_last = true; | |
243 | break; | |
244 | default: | |
fbf3c936 | 245 | dev_err(component->dev, "tdm mask must start at slot 0 or 4\n"); |
157b68ba AD |
246 | return -EINVAL; |
247 | } | |
248 | ||
fbf3c936 | 249 | snd_soc_component_update_bits(component, TAS6424_SAP_CTRL, TAS6424_SAP_TDM_SLOT_LAST, |
157b68ba AD |
250 | sap_tdm_slot_last ? TAS6424_SAP_TDM_SLOT_LAST : 0); |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
38803ce7 | 255 | static int tas6424_mute(struct snd_soc_dai *dai, int mute, int direction) |
157b68ba | 256 | { |
fbf3c936 | 257 | struct snd_soc_component *component = dai->component; |
e969a6d2 | 258 | struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component); |
157b68ba AD |
259 | unsigned int val; |
260 | ||
fbf3c936 | 261 | dev_dbg(component->dev, "%s() mute=%d\n", __func__, mute); |
157b68ba | 262 | |
e969a6d2 JJH |
263 | if (tas6424->mute_gpio) { |
264 | gpiod_set_value_cansleep(tas6424->mute_gpio, mute); | |
265 | return 0; | |
266 | } | |
267 | ||
157b68ba AD |
268 | if (mute) |
269 | val = TAS6424_ALL_STATE_MUTE; | |
270 | else | |
271 | val = TAS6424_ALL_STATE_PLAY; | |
272 | ||
fbf3c936 | 273 | snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, val); |
157b68ba AD |
274 | |
275 | return 0; | |
276 | } | |
277 | ||
fbf3c936 | 278 | static int tas6424_power_off(struct snd_soc_component *component) |
157b68ba | 279 | { |
fbf3c936 | 280 | struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component); |
157b68ba AD |
281 | int ret; |
282 | ||
fbf3c936 | 283 | snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, TAS6424_ALL_STATE_HIZ); |
157b68ba AD |
284 | |
285 | regcache_cache_only(tas6424->regmap, true); | |
286 | regcache_mark_dirty(tas6424->regmap); | |
287 | ||
288 | ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), | |
289 | tas6424->supplies); | |
290 | if (ret < 0) { | |
fbf3c936 | 291 | dev_err(component->dev, "failed to disable supplies: %d\n", ret); |
157b68ba AD |
292 | return ret; |
293 | } | |
294 | ||
295 | return 0; | |
296 | } | |
297 | ||
fbf3c936 | 298 | static int tas6424_power_on(struct snd_soc_component *component) |
157b68ba | 299 | { |
fbf3c936 | 300 | struct tas6424_data *tas6424 = snd_soc_component_get_drvdata(component); |
157b68ba | 301 | int ret; |
e969a6d2 | 302 | u8 chan_states; |
39688877 JJH |
303 | int no_auto_diags = 0; |
304 | unsigned int reg_val; | |
305 | ||
306 | if (!regmap_read(tas6424->regmap, TAS6424_DC_DIAG_CTRL1, ®_val)) | |
307 | no_auto_diags = reg_val & TAS6424_LDGBYPASS_MASK; | |
157b68ba AD |
308 | |
309 | ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), | |
310 | tas6424->supplies); | |
311 | if (ret < 0) { | |
fbf3c936 | 312 | dev_err(component->dev, "failed to enable supplies: %d\n", ret); |
157b68ba AD |
313 | return ret; |
314 | } | |
315 | ||
316 | regcache_cache_only(tas6424->regmap, false); | |
317 | ||
318 | ret = regcache_sync(tas6424->regmap); | |
319 | if (ret < 0) { | |
fbf3c936 | 320 | dev_err(component->dev, "failed to sync regcache: %d\n", ret); |
157b68ba AD |
321 | return ret; |
322 | } | |
323 | ||
e969a6d2 JJH |
324 | if (tas6424->mute_gpio) { |
325 | gpiod_set_value_cansleep(tas6424->mute_gpio, 0); | |
326 | /* | |
327 | * channels are muted via the mute pin. Don't also mute | |
328 | * them via the registers so that subsequent register | |
329 | * access is not necessary to un-mute the channels | |
330 | */ | |
331 | chan_states = TAS6424_ALL_STATE_PLAY; | |
332 | } else { | |
333 | chan_states = TAS6424_ALL_STATE_MUTE; | |
334 | } | |
335 | snd_soc_component_write(component, TAS6424_CH_STATE_CTRL, chan_states); | |
157b68ba AD |
336 | |
337 | /* any time we come out of HIZ, the output channels automatically run DC | |
39688877 JJH |
338 | * load diagnostics if autodiagnotics are enabled. wait here until this |
339 | * completes. | |
157b68ba | 340 | */ |
39688877 JJH |
341 | if (!no_auto_diags) |
342 | msleep(230); | |
157b68ba AD |
343 | |
344 | return 0; | |
345 | } | |
346 | ||
fbf3c936 | 347 | static int tas6424_set_bias_level(struct snd_soc_component *component, |
157b68ba AD |
348 | enum snd_soc_bias_level level) |
349 | { | |
fbf3c936 | 350 | dev_dbg(component->dev, "%s() level=%d\n", __func__, level); |
157b68ba AD |
351 | |
352 | switch (level) { | |
353 | case SND_SOC_BIAS_ON: | |
354 | case SND_SOC_BIAS_PREPARE: | |
355 | break; | |
356 | case SND_SOC_BIAS_STANDBY: | |
fbf3c936 KM |
357 | if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) |
358 | tas6424_power_on(component); | |
157b68ba AD |
359 | break; |
360 | case SND_SOC_BIAS_OFF: | |
fbf3c936 | 361 | tas6424_power_off(component); |
157b68ba AD |
362 | break; |
363 | } | |
364 | ||
365 | return 0; | |
366 | } | |
367 | ||
fbf3c936 KM |
368 | static struct snd_soc_component_driver soc_codec_dev_tas6424 = { |
369 | .set_bias_level = tas6424_set_bias_level, | |
370 | .controls = tas6424_snd_controls, | |
371 | .num_controls = ARRAY_SIZE(tas6424_snd_controls), | |
372 | .dapm_widgets = tas6424_dapm_widgets, | |
373 | .num_dapm_widgets = ARRAY_SIZE(tas6424_dapm_widgets), | |
374 | .dapm_routes = tas6424_audio_map, | |
375 | .num_dapm_routes = ARRAY_SIZE(tas6424_audio_map), | |
376 | .use_pmdown_time = 1, | |
377 | .endianness = 1, | |
378 | .non_legacy_dai_naming = 1, | |
157b68ba AD |
379 | }; |
380 | ||
704a9fc2 | 381 | static const struct snd_soc_dai_ops tas6424_speaker_dai_ops = { |
157b68ba AD |
382 | .hw_params = tas6424_hw_params, |
383 | .set_fmt = tas6424_set_dai_fmt, | |
384 | .set_tdm_slot = tas6424_set_dai_tdm_slot, | |
38803ce7 KM |
385 | .mute_stream = tas6424_mute, |
386 | .no_capture_mute = 1, | |
157b68ba AD |
387 | }; |
388 | ||
389 | static struct snd_soc_dai_driver tas6424_dai[] = { | |
390 | { | |
391 | .name = "tas6424-amplifier", | |
392 | .playback = { | |
393 | .stream_name = "Playback", | |
394 | .channels_min = 1, | |
395 | .channels_max = 4, | |
396 | .rates = TAS6424_RATES, | |
397 | .formats = TAS6424_FORMATS, | |
398 | }, | |
399 | .ops = &tas6424_speaker_dai_ops, | |
400 | }, | |
401 | }; | |
402 | ||
403 | static void tas6424_fault_check_work(struct work_struct *work) | |
404 | { | |
405 | struct tas6424_data *tas6424 = container_of(work, struct tas6424_data, | |
406 | fault_check_work.work); | |
407 | struct device *dev = tas6424->dev; | |
408 | unsigned int reg; | |
409 | int ret; | |
410 | ||
5fb6589a AD |
411 | ret = regmap_read(tas6424->regmap, TAS6424_CHANNEL_FAULT, ®); |
412 | if (ret < 0) { | |
413 | dev_err(dev, "failed to read CHANNEL_FAULT register: %d\n", ret); | |
414 | goto out; | |
415 | } | |
416 | ||
417 | if (!reg) { | |
418 | tas6424->last_cfault = reg; | |
419 | goto check_global_fault1_reg; | |
420 | } | |
421 | ||
422 | /* | |
423 | * Only flag errors once for a given occurrence. This is needed as | |
424 | * the TAS6424 will take time clearing the fault condition internally | |
425 | * during which we don't want to bombard the system with the same | |
426 | * error message over and over. | |
427 | */ | |
428 | if ((reg & TAS6424_FAULT_OC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH1)) | |
429 | dev_crit(dev, "experienced a channel 1 overcurrent fault\n"); | |
430 | ||
431 | if ((reg & TAS6424_FAULT_OC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH2)) | |
432 | dev_crit(dev, "experienced a channel 2 overcurrent fault\n"); | |
433 | ||
434 | if ((reg & TAS6424_FAULT_OC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH3)) | |
435 | dev_crit(dev, "experienced a channel 3 overcurrent fault\n"); | |
436 | ||
437 | if ((reg & TAS6424_FAULT_OC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_OC_CH4)) | |
438 | dev_crit(dev, "experienced a channel 4 overcurrent fault\n"); | |
439 | ||
440 | if ((reg & TAS6424_FAULT_DC_CH1) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH1)) | |
441 | dev_crit(dev, "experienced a channel 1 DC fault\n"); | |
442 | ||
443 | if ((reg & TAS6424_FAULT_DC_CH2) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH2)) | |
444 | dev_crit(dev, "experienced a channel 2 DC fault\n"); | |
445 | ||
446 | if ((reg & TAS6424_FAULT_DC_CH3) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH3)) | |
447 | dev_crit(dev, "experienced a channel 3 DC fault\n"); | |
448 | ||
449 | if ((reg & TAS6424_FAULT_DC_CH4) && !(tas6424->last_cfault & TAS6424_FAULT_DC_CH4)) | |
450 | dev_crit(dev, "experienced a channel 4 DC fault\n"); | |
451 | ||
452 | /* Store current fault1 value so we can detect any changes next time */ | |
453 | tas6424->last_cfault = reg; | |
454 | ||
455 | check_global_fault1_reg: | |
157b68ba AD |
456 | ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT1, ®); |
457 | if (ret < 0) { | |
91986921 | 458 | dev_err(dev, "failed to read GLOB_FAULT1 register: %d\n", ret); |
157b68ba AD |
459 | goto out; |
460 | } | |
461 | ||
462 | /* | |
463 | * Ignore any clock faults as there is no clean way to check for them. | |
464 | * We would need to start checking for those faults *after* the SAIF | |
465 | * stream has been setup, and stop checking *before* the stream is | |
466 | * stopped to avoid any false-positives. However there are no | |
467 | * appropriate hooks to monitor these events. | |
468 | */ | |
469 | reg &= TAS6424_FAULT_PVDD_OV | | |
470 | TAS6424_FAULT_VBAT_OV | | |
471 | TAS6424_FAULT_PVDD_UV | | |
472 | TAS6424_FAULT_VBAT_UV; | |
473 | ||
d40e3e9e AD |
474 | if (!reg) { |
475 | tas6424->last_fault1 = reg; | |
157b68ba | 476 | goto check_global_fault2_reg; |
d40e3e9e | 477 | } |
157b68ba | 478 | |
157b68ba AD |
479 | if ((reg & TAS6424_FAULT_PVDD_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_OV)) |
480 | dev_crit(dev, "experienced a PVDD overvoltage fault\n"); | |
481 | ||
482 | if ((reg & TAS6424_FAULT_VBAT_OV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_OV)) | |
483 | dev_crit(dev, "experienced a VBAT overvoltage fault\n"); | |
484 | ||
485 | if ((reg & TAS6424_FAULT_PVDD_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_PVDD_UV)) | |
486 | dev_crit(dev, "experienced a PVDD undervoltage fault\n"); | |
487 | ||
488 | if ((reg & TAS6424_FAULT_VBAT_UV) && !(tas6424->last_fault1 & TAS6424_FAULT_VBAT_UV)) | |
489 | dev_crit(dev, "experienced a VBAT undervoltage fault\n"); | |
490 | ||
491 | /* Store current fault1 value so we can detect any changes next time */ | |
492 | tas6424->last_fault1 = reg; | |
493 | ||
494 | check_global_fault2_reg: | |
495 | ret = regmap_read(tas6424->regmap, TAS6424_GLOB_FAULT2, ®); | |
496 | if (ret < 0) { | |
91986921 | 497 | dev_err(dev, "failed to read GLOB_FAULT2 register: %d\n", ret); |
157b68ba AD |
498 | goto out; |
499 | } | |
500 | ||
501 | reg &= TAS6424_FAULT_OTSD | | |
502 | TAS6424_FAULT_OTSD_CH1 | | |
503 | TAS6424_FAULT_OTSD_CH2 | | |
504 | TAS6424_FAULT_OTSD_CH3 | | |
505 | TAS6424_FAULT_OTSD_CH4; | |
506 | ||
d40e3e9e AD |
507 | if (!reg) { |
508 | tas6424->last_fault2 = reg; | |
157b68ba | 509 | goto check_warn_reg; |
d40e3e9e | 510 | } |
157b68ba AD |
511 | |
512 | if ((reg & TAS6424_FAULT_OTSD) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD)) | |
513 | dev_crit(dev, "experienced a global overtemp shutdown\n"); | |
514 | ||
515 | if ((reg & TAS6424_FAULT_OTSD_CH1) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH1)) | |
516 | dev_crit(dev, "experienced an overtemp shutdown on CH1\n"); | |
517 | ||
518 | if ((reg & TAS6424_FAULT_OTSD_CH2) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH2)) | |
519 | dev_crit(dev, "experienced an overtemp shutdown on CH2\n"); | |
520 | ||
521 | if ((reg & TAS6424_FAULT_OTSD_CH3) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH3)) | |
522 | dev_crit(dev, "experienced an overtemp shutdown on CH3\n"); | |
523 | ||
524 | if ((reg & TAS6424_FAULT_OTSD_CH4) && !(tas6424->last_fault2 & TAS6424_FAULT_OTSD_CH4)) | |
525 | dev_crit(dev, "experienced an overtemp shutdown on CH4\n"); | |
526 | ||
527 | /* Store current fault2 value so we can detect any changes next time */ | |
528 | tas6424->last_fault2 = reg; | |
529 | ||
530 | check_warn_reg: | |
531 | ret = regmap_read(tas6424->regmap, TAS6424_WARN, ®); | |
532 | if (ret < 0) { | |
533 | dev_err(dev, "failed to read WARN register: %d\n", ret); | |
534 | goto out; | |
535 | } | |
536 | ||
537 | reg &= TAS6424_WARN_VDD_UV | | |
538 | TAS6424_WARN_VDD_POR | | |
539 | TAS6424_WARN_VDD_OTW | | |
540 | TAS6424_WARN_VDD_OTW_CH1 | | |
541 | TAS6424_WARN_VDD_OTW_CH2 | | |
542 | TAS6424_WARN_VDD_OTW_CH3 | | |
543 | TAS6424_WARN_VDD_OTW_CH4; | |
544 | ||
d40e3e9e AD |
545 | if (!reg) { |
546 | tas6424->last_warn = reg; | |
157b68ba | 547 | goto out; |
d40e3e9e | 548 | } |
157b68ba AD |
549 | |
550 | if ((reg & TAS6424_WARN_VDD_UV) && !(tas6424->last_warn & TAS6424_WARN_VDD_UV)) | |
551 | dev_warn(dev, "experienced a VDD under voltage condition\n"); | |
552 | ||
553 | if ((reg & TAS6424_WARN_VDD_POR) && !(tas6424->last_warn & TAS6424_WARN_VDD_POR)) | |
554 | dev_warn(dev, "experienced a VDD POR condition\n"); | |
555 | ||
556 | if ((reg & TAS6424_WARN_VDD_OTW) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW)) | |
557 | dev_warn(dev, "experienced a global overtemp warning\n"); | |
558 | ||
559 | if ((reg & TAS6424_WARN_VDD_OTW_CH1) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH1)) | |
560 | dev_warn(dev, "experienced an overtemp warning on CH1\n"); | |
561 | ||
562 | if ((reg & TAS6424_WARN_VDD_OTW_CH2) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH2)) | |
563 | dev_warn(dev, "experienced an overtemp warning on CH2\n"); | |
564 | ||
565 | if ((reg & TAS6424_WARN_VDD_OTW_CH3) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH3)) | |
566 | dev_warn(dev, "experienced an overtemp warning on CH3\n"); | |
567 | ||
568 | if ((reg & TAS6424_WARN_VDD_OTW_CH4) && !(tas6424->last_warn & TAS6424_WARN_VDD_OTW_CH4)) | |
569 | dev_warn(dev, "experienced an overtemp warning on CH4\n"); | |
570 | ||
571 | /* Store current warn value so we can detect any changes next time */ | |
572 | tas6424->last_warn = reg; | |
573 | ||
91986921 | 574 | /* Clear any warnings by toggling the CLEAR_FAULT control bit */ |
157b68ba AD |
575 | ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3, |
576 | TAS6424_CLEAR_FAULT, TAS6424_CLEAR_FAULT); | |
577 | if (ret < 0) | |
578 | dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); | |
579 | ||
580 | ret = regmap_write_bits(tas6424->regmap, TAS6424_MISC_CTRL3, | |
581 | TAS6424_CLEAR_FAULT, 0); | |
582 | if (ret < 0) | |
583 | dev_err(dev, "failed to write MISC_CTRL3 register: %d\n", ret); | |
584 | ||
585 | out: | |
586 | /* Schedule the next fault check at the specified interval */ | |
587 | schedule_delayed_work(&tas6424->fault_check_work, | |
588 | msecs_to_jiffies(TAS6424_FAULT_CHECK_INTERVAL)); | |
589 | } | |
590 | ||
591 | static const struct reg_default tas6424_reg_defaults[] = { | |
592 | { TAS6424_MODE_CTRL, 0x00 }, | |
593 | { TAS6424_MISC_CTRL1, 0x32 }, | |
594 | { TAS6424_MISC_CTRL2, 0x62 }, | |
595 | { TAS6424_SAP_CTRL, 0x04 }, | |
596 | { TAS6424_CH_STATE_CTRL, 0x55 }, | |
597 | { TAS6424_CH1_VOL_CTRL, 0xcf }, | |
598 | { TAS6424_CH2_VOL_CTRL, 0xcf }, | |
599 | { TAS6424_CH3_VOL_CTRL, 0xcf }, | |
600 | { TAS6424_CH4_VOL_CTRL, 0xcf }, | |
601 | { TAS6424_DC_DIAG_CTRL1, 0x00 }, | |
602 | { TAS6424_DC_DIAG_CTRL2, 0x11 }, | |
603 | { TAS6424_DC_DIAG_CTRL3, 0x11 }, | |
604 | { TAS6424_PIN_CTRL, 0xff }, | |
605 | { TAS6424_AC_DIAG_CTRL1, 0x00 }, | |
606 | { TAS6424_MISC_CTRL3, 0x00 }, | |
607 | { TAS6424_CLIP_CTRL, 0x01 }, | |
608 | { TAS6424_CLIP_WINDOW, 0x14 }, | |
609 | { TAS6424_CLIP_WARN, 0x00 }, | |
610 | { TAS6424_CBC_STAT, 0x00 }, | |
611 | { TAS6424_MISC_CTRL4, 0x40 }, | |
612 | }; | |
613 | ||
614 | static bool tas6424_is_writable_reg(struct device *dev, unsigned int reg) | |
615 | { | |
616 | switch (reg) { | |
617 | case TAS6424_MODE_CTRL: | |
618 | case TAS6424_MISC_CTRL1: | |
619 | case TAS6424_MISC_CTRL2: | |
620 | case TAS6424_SAP_CTRL: | |
621 | case TAS6424_CH_STATE_CTRL: | |
622 | case TAS6424_CH1_VOL_CTRL: | |
623 | case TAS6424_CH2_VOL_CTRL: | |
624 | case TAS6424_CH3_VOL_CTRL: | |
625 | case TAS6424_CH4_VOL_CTRL: | |
626 | case TAS6424_DC_DIAG_CTRL1: | |
627 | case TAS6424_DC_DIAG_CTRL2: | |
628 | case TAS6424_DC_DIAG_CTRL3: | |
629 | case TAS6424_PIN_CTRL: | |
630 | case TAS6424_AC_DIAG_CTRL1: | |
631 | case TAS6424_MISC_CTRL3: | |
632 | case TAS6424_CLIP_CTRL: | |
633 | case TAS6424_CLIP_WINDOW: | |
634 | case TAS6424_CLIP_WARN: | |
635 | case TAS6424_CBC_STAT: | |
636 | case TAS6424_MISC_CTRL4: | |
637 | return true; | |
638 | default: | |
639 | return false; | |
640 | } | |
641 | } | |
642 | ||
643 | static bool tas6424_is_volatile_reg(struct device *dev, unsigned int reg) | |
644 | { | |
645 | switch (reg) { | |
646 | case TAS6424_DC_LOAD_DIAG_REP12: | |
647 | case TAS6424_DC_LOAD_DIAG_REP34: | |
648 | case TAS6424_DC_LOAD_DIAG_REPLO: | |
649 | case TAS6424_CHANNEL_STATE: | |
650 | case TAS6424_CHANNEL_FAULT: | |
651 | case TAS6424_GLOB_FAULT1: | |
652 | case TAS6424_GLOB_FAULT2: | |
653 | case TAS6424_WARN: | |
654 | case TAS6424_AC_LOAD_DIAG_REP1: | |
655 | case TAS6424_AC_LOAD_DIAG_REP2: | |
656 | case TAS6424_AC_LOAD_DIAG_REP3: | |
657 | case TAS6424_AC_LOAD_DIAG_REP4: | |
658 | return true; | |
659 | default: | |
660 | return false; | |
661 | } | |
662 | } | |
663 | ||
664 | static const struct regmap_config tas6424_regmap_config = { | |
665 | .reg_bits = 8, | |
666 | .val_bits = 8, | |
667 | ||
668 | .writeable_reg = tas6424_is_writable_reg, | |
669 | .volatile_reg = tas6424_is_volatile_reg, | |
670 | ||
671 | .max_register = TAS6424_MAX, | |
672 | .reg_defaults = tas6424_reg_defaults, | |
673 | .num_reg_defaults = ARRAY_SIZE(tas6424_reg_defaults), | |
674 | .cache_type = REGCACHE_RBTREE, | |
675 | }; | |
676 | ||
677 | #if IS_ENABLED(CONFIG_OF) | |
678 | static const struct of_device_id tas6424_of_ids[] = { | |
679 | { .compatible = "ti,tas6424", }, | |
680 | { }, | |
681 | }; | |
682 | MODULE_DEVICE_TABLE(of, tas6424_of_ids); | |
683 | #endif | |
684 | ||
685 | static int tas6424_i2c_probe(struct i2c_client *client, | |
686 | const struct i2c_device_id *id) | |
687 | { | |
688 | struct device *dev = &client->dev; | |
689 | struct tas6424_data *tas6424; | |
690 | int ret; | |
691 | int i; | |
692 | ||
693 | tas6424 = devm_kzalloc(dev, sizeof(*tas6424), GFP_KERNEL); | |
694 | if (!tas6424) | |
695 | return -ENOMEM; | |
696 | dev_set_drvdata(dev, tas6424); | |
697 | ||
698 | tas6424->dev = dev; | |
699 | ||
700 | tas6424->regmap = devm_regmap_init_i2c(client, &tas6424_regmap_config); | |
701 | if (IS_ERR(tas6424->regmap)) { | |
702 | ret = PTR_ERR(tas6424->regmap); | |
703 | dev_err(dev, "unable to allocate register map: %d\n", ret); | |
704 | return ret; | |
705 | } | |
706 | ||
e3976aa6 JJH |
707 | /* |
708 | * Get control of the standby pin and set it LOW to take the codec | |
709 | * out of the stand-by mode. | |
710 | * Note: The actual pin polarity is taken care of in the GPIO lib | |
711 | * according the polarity specified in the DTS. | |
712 | */ | |
713 | tas6424->standby_gpio = devm_gpiod_get_optional(dev, "standby", | |
714 | GPIOD_OUT_LOW); | |
715 | if (IS_ERR(tas6424->standby_gpio)) { | |
716 | if (PTR_ERR(tas6424->standby_gpio) == -EPROBE_DEFER) | |
717 | return -EPROBE_DEFER; | |
718 | dev_info(dev, "failed to get standby GPIO: %ld\n", | |
719 | PTR_ERR(tas6424->standby_gpio)); | |
720 | tas6424->standby_gpio = NULL; | |
721 | } | |
722 | ||
e969a6d2 JJH |
723 | /* |
724 | * Get control of the mute pin and set it HIGH in order to start with | |
725 | * all the output muted. | |
726 | * Note: The actual pin polarity is taken care of in the GPIO lib | |
727 | * according the polarity specified in the DTS. | |
728 | */ | |
729 | tas6424->mute_gpio = devm_gpiod_get_optional(dev, "mute", | |
730 | GPIOD_OUT_HIGH); | |
731 | if (IS_ERR(tas6424->mute_gpio)) { | |
732 | if (PTR_ERR(tas6424->mute_gpio) == -EPROBE_DEFER) | |
733 | return -EPROBE_DEFER; | |
734 | dev_info(dev, "failed to get nmute GPIO: %ld\n", | |
735 | PTR_ERR(tas6424->mute_gpio)); | |
736 | tas6424->mute_gpio = NULL; | |
737 | } | |
738 | ||
157b68ba AD |
739 | for (i = 0; i < ARRAY_SIZE(tas6424->supplies); i++) |
740 | tas6424->supplies[i].supply = tas6424_supply_names[i]; | |
741 | ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(tas6424->supplies), | |
742 | tas6424->supplies); | |
743 | if (ret) { | |
744 | dev_err(dev, "unable to request supplies: %d\n", ret); | |
745 | return ret; | |
746 | } | |
747 | ||
748 | ret = regulator_bulk_enable(ARRAY_SIZE(tas6424->supplies), | |
749 | tas6424->supplies); | |
750 | if (ret) { | |
751 | dev_err(dev, "unable to enable supplies: %d\n", ret); | |
752 | return ret; | |
753 | } | |
754 | ||
755 | /* Reset device to establish well-defined startup state */ | |
756 | ret = regmap_update_bits(tas6424->regmap, TAS6424_MODE_CTRL, | |
757 | TAS6424_RESET, TAS6424_RESET); | |
758 | if (ret) { | |
759 | dev_err(dev, "unable to reset device: %d\n", ret); | |
760 | return ret; | |
761 | } | |
762 | ||
763 | INIT_DELAYED_WORK(&tas6424->fault_check_work, tas6424_fault_check_work); | |
764 | ||
fbf3c936 | 765 | ret = devm_snd_soc_register_component(dev, &soc_codec_dev_tas6424, |
157b68ba AD |
766 | tas6424_dai, ARRAY_SIZE(tas6424_dai)); |
767 | if (ret < 0) { | |
768 | dev_err(dev, "unable to register codec: %d\n", ret); | |
769 | return ret; | |
770 | } | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | static int tas6424_i2c_remove(struct i2c_client *client) | |
776 | { | |
777 | struct device *dev = &client->dev; | |
778 | struct tas6424_data *tas6424 = dev_get_drvdata(dev); | |
779 | int ret; | |
780 | ||
157b68ba AD |
781 | cancel_delayed_work_sync(&tas6424->fault_check_work); |
782 | ||
e3976aa6 JJH |
783 | /* put the codec in stand-by */ |
784 | if (tas6424->standby_gpio) | |
785 | gpiod_set_value_cansleep(tas6424->standby_gpio, 1); | |
786 | ||
157b68ba AD |
787 | ret = regulator_bulk_disable(ARRAY_SIZE(tas6424->supplies), |
788 | tas6424->supplies); | |
789 | if (ret < 0) { | |
790 | dev_err(dev, "unable to disable supplies: %d\n", ret); | |
791 | return ret; | |
792 | } | |
793 | ||
794 | return 0; | |
795 | } | |
796 | ||
797 | static const struct i2c_device_id tas6424_i2c_ids[] = { | |
798 | { "tas6424", 0 }, | |
799 | { } | |
800 | }; | |
801 | MODULE_DEVICE_TABLE(i2c, tas6424_i2c_ids); | |
802 | ||
803 | static struct i2c_driver tas6424_i2c_driver = { | |
804 | .driver = { | |
805 | .name = "tas6424", | |
806 | .of_match_table = of_match_ptr(tas6424_of_ids), | |
807 | }, | |
808 | .probe = tas6424_i2c_probe, | |
809 | .remove = tas6424_i2c_remove, | |
810 | .id_table = tas6424_i2c_ids, | |
811 | }; | |
812 | module_i2c_driver(tas6424_i2c_driver); | |
813 | ||
814 | MODULE_AUTHOR("Andreas Dannenberg <dannenberg@ti.com>"); | |
815 | MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); | |
816 | MODULE_DESCRIPTION("TAS6424 Audio amplifier driver"); | |
817 | MODULE_LICENSE("GPL v2"); |