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1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // ALSA SoC Texas Instruments TAS2770 20-W Digital Input Mono Class-D
4 // Audio Amplifier with Speaker I/V Sense
5 //
6 // Copyright (C) 2016-2017 Texas Instruments Incorporated - https://www.ti.com/
7 //      Author: Tracy Yi <[email protected]>
8 //      Frank Shi <[email protected]>
9
10 #include <linux/module.h>
11 #include <linux/moduleparam.h>
12 #include <linux/err.h>
13 #include <linux/init.h>
14 #include <linux/delay.h>
15 #include <linux/pm.h>
16 #include <linux/i2c.h>
17 #include <linux/gpio/consumer.h>
18 #include <linux/regulator/consumer.h>
19 #include <linux/firmware.h>
20 #include <linux/regmap.h>
21 #include <linux/of.h>
22 #include <linux/slab.h>
23 #include <sound/soc.h>
24 #include <sound/pcm.h>
25 #include <sound/pcm_params.h>
26 #include <sound/initval.h>
27 #include <sound/tlv.h>
28
29 #include "tas2770.h"
30
31 #define TAS2770_MDELAY 0xFFFFFFFE
32
33 static void tas2770_reset(struct tas2770_priv *tas2770)
34 {
35         if (tas2770->reset_gpio) {
36                 gpiod_set_value_cansleep(tas2770->reset_gpio, 0);
37                 msleep(20);
38                 gpiod_set_value_cansleep(tas2770->reset_gpio, 1);
39                 usleep_range(1000, 2000);
40         }
41
42         snd_soc_component_write(tas2770->component, TAS2770_SW_RST,
43                 TAS2770_RST);
44         usleep_range(1000, 2000);
45 }
46
47 static int tas2770_update_pwr_ctrl(struct tas2770_priv *tas2770)
48 {
49         struct snd_soc_component *component = tas2770->component;
50         unsigned int val;
51         int ret;
52
53         if (tas2770->dac_powered)
54                 val = tas2770->unmuted ?
55                         TAS2770_PWR_CTRL_ACTIVE : TAS2770_PWR_CTRL_MUTE;
56         else
57                 val = TAS2770_PWR_CTRL_SHUTDOWN;
58
59         ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
60                                             TAS2770_PWR_CTRL_MASK, val);
61         if (ret < 0)
62                 return ret;
63
64         return 0;
65 }
66
67 #ifdef CONFIG_PM
68 static int tas2770_codec_suspend(struct snd_soc_component *component)
69 {
70         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
71         int ret = 0;
72
73         regcache_cache_only(tas2770->regmap, true);
74         regcache_mark_dirty(tas2770->regmap);
75
76         if (tas2770->sdz_gpio) {
77                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 0);
78         } else {
79                 ret = snd_soc_component_update_bits(component, TAS2770_PWR_CTRL,
80                                                     TAS2770_PWR_CTRL_MASK,
81                                                     TAS2770_PWR_CTRL_SHUTDOWN);
82                 if (ret < 0) {
83                         regcache_cache_only(tas2770->regmap, false);
84                         regcache_sync(tas2770->regmap);
85                         return ret;
86                 }
87
88                 ret = 0;
89         }
90
91         return ret;
92 }
93
94 static int tas2770_codec_resume(struct snd_soc_component *component)
95 {
96         struct tas2770_priv *tas2770 = snd_soc_component_get_drvdata(component);
97         int ret;
98
99         if (tas2770->sdz_gpio) {
100                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
101                 usleep_range(1000, 2000);
102         } else {
103                 ret = tas2770_update_pwr_ctrl(tas2770);
104                 if (ret < 0)
105                         return ret;
106         }
107
108         regcache_cache_only(tas2770->regmap, false);
109
110         return regcache_sync(tas2770->regmap);
111 }
112 #else
113 #define tas2770_codec_suspend NULL
114 #define tas2770_codec_resume NULL
115 #endif
116
117 static const char * const tas2770_ASI1_src[] = {
118         "I2C offset", "Left", "Right", "LeftRightDiv2",
119 };
120
121 static SOC_ENUM_SINGLE_DECL(
122         tas2770_ASI1_src_enum, TAS2770_TDM_CFG_REG2,
123         4, tas2770_ASI1_src);
124
125 static const struct snd_kcontrol_new tas2770_asi1_mux =
126         SOC_DAPM_ENUM("ASI1 Source", tas2770_ASI1_src_enum);
127
128 static int tas2770_dac_event(struct snd_soc_dapm_widget *w,
129                              struct snd_kcontrol *kcontrol, int event)
130 {
131         struct snd_soc_component *component =
132                         snd_soc_dapm_to_component(w->dapm);
133         struct tas2770_priv *tas2770 =
134                         snd_soc_component_get_drvdata(component);
135         int ret;
136
137         switch (event) {
138         case SND_SOC_DAPM_POST_PMU:
139                 tas2770->dac_powered = 1;
140                 ret = tas2770_update_pwr_ctrl(tas2770);
141                 break;
142         case SND_SOC_DAPM_PRE_PMD:
143                 tas2770->dac_powered = 0;
144                 ret = tas2770_update_pwr_ctrl(tas2770);
145                 break;
146         default:
147                 dev_err(tas2770->dev, "Not supported evevt\n");
148                 return -EINVAL;
149         }
150
151         return ret;
152 }
153
154 static const struct snd_kcontrol_new isense_switch =
155         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 3, 1, 1);
156 static const struct snd_kcontrol_new vsense_switch =
157         SOC_DAPM_SINGLE("Switch", TAS2770_PWR_CTRL, 2, 1, 1);
158
159 static const struct snd_soc_dapm_widget tas2770_dapm_widgets[] = {
160         SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
161         SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2770_asi1_mux),
162         SND_SOC_DAPM_SWITCH("ISENSE", TAS2770_PWR_CTRL, 3, 1, &isense_switch),
163         SND_SOC_DAPM_SWITCH("VSENSE", TAS2770_PWR_CTRL, 2, 1, &vsense_switch),
164         SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2770_dac_event,
165                            SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
166         SND_SOC_DAPM_OUTPUT("OUT"),
167         SND_SOC_DAPM_SIGGEN("VMON"),
168         SND_SOC_DAPM_SIGGEN("IMON")
169 };
170
171 static const struct snd_soc_dapm_route tas2770_audio_map[] = {
172         {"ASI1 Sel", "I2C offset", "ASI1"},
173         {"ASI1 Sel", "Left", "ASI1"},
174         {"ASI1 Sel", "Right", "ASI1"},
175         {"ASI1 Sel", "LeftRightDiv2", "ASI1"},
176         {"DAC", NULL, "ASI1 Sel"},
177         {"OUT", NULL, "DAC"},
178         {"ISENSE", "Switch", "IMON"},
179         {"VSENSE", "Switch", "VMON"},
180 };
181
182 static int tas2770_mute(struct snd_soc_dai *dai, int mute, int direction)
183 {
184         struct snd_soc_component *component = dai->component;
185         struct tas2770_priv *tas2770 =
186                         snd_soc_component_get_drvdata(component);
187
188         tas2770->unmuted = !mute;
189         return tas2770_update_pwr_ctrl(tas2770);
190 }
191
192 static int tas2770_set_bitwidth(struct tas2770_priv *tas2770, int bitwidth)
193 {
194         int ret;
195         struct snd_soc_component *component = tas2770->component;
196
197         switch (bitwidth) {
198         case SNDRV_PCM_FORMAT_S16_LE:
199                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
200                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
201                                                     TAS2770_TDM_CFG_REG2_RXW_16BITS);
202                 tas2770->v_sense_slot = tas2770->i_sense_slot + 2;
203                 break;
204         case SNDRV_PCM_FORMAT_S24_LE:
205                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
206                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
207                                                     TAS2770_TDM_CFG_REG2_RXW_24BITS);
208                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
209                 break;
210         case SNDRV_PCM_FORMAT_S32_LE:
211                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
212                                                     TAS2770_TDM_CFG_REG2_RXW_MASK,
213                                                     TAS2770_TDM_CFG_REG2_RXW_32BITS);
214                 tas2770->v_sense_slot = tas2770->i_sense_slot + 4;
215                 break;
216
217         default:
218                 return -EINVAL;
219         }
220
221         if (ret < 0)
222                 return ret;
223
224         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG5,
225                                             TAS2770_TDM_CFG_REG5_VSNS_MASK |
226                                             TAS2770_TDM_CFG_REG5_50_MASK,
227                                             TAS2770_TDM_CFG_REG5_VSNS_ENABLE |
228                 tas2770->v_sense_slot);
229         if (ret < 0)
230                 return ret;
231
232         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG6,
233                                             TAS2770_TDM_CFG_REG6_ISNS_MASK |
234                                             TAS2770_TDM_CFG_REG6_50_MASK,
235                                             TAS2770_TDM_CFG_REG6_ISNS_ENABLE |
236                                             tas2770->i_sense_slot);
237         if (ret < 0)
238                 return ret;
239
240         return 0;
241 }
242
243 static int tas2770_set_samplerate(struct tas2770_priv *tas2770, int samplerate)
244 {
245         struct snd_soc_component *component = tas2770->component;
246         int ramp_rate_val;
247         int ret;
248
249         switch (samplerate) {
250         case 48000:
251                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
252                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
253                 break;
254         case 44100:
255                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
256                                 TAS2770_TDM_CFG_REG0_31_44_1_48KHZ;
257                 break;
258         case 96000:
259                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
260                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
261                 break;
262         case 88200:
263                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
264                                 TAS2770_TDM_CFG_REG0_31_88_2_96KHZ;
265                 break;
266         case 192000:
267                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_48KHZ |
268                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
269                 break;
270         case 176400:
271                 ramp_rate_val = TAS2770_TDM_CFG_REG0_SMP_44_1KHZ |
272                                 TAS2770_TDM_CFG_REG0_31_176_4_192KHZ;
273                 break;
274         default:
275                 return -EINVAL;
276         }
277
278         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
279                                             TAS2770_TDM_CFG_REG0_SMP_MASK |
280                                             TAS2770_TDM_CFG_REG0_31_MASK,
281                                             ramp_rate_val);
282         if (ret < 0)
283                 return ret;
284
285         return 0;
286 }
287
288 static int tas2770_hw_params(struct snd_pcm_substream *substream,
289                              struct snd_pcm_hw_params *params,
290                              struct snd_soc_dai *dai)
291 {
292         struct snd_soc_component *component = dai->component;
293         struct tas2770_priv *tas2770 =
294                         snd_soc_component_get_drvdata(component);
295         int ret;
296
297         ret = tas2770_set_bitwidth(tas2770, params_format(params));
298         if (ret)
299                 return ret;
300
301         return tas2770_set_samplerate(tas2770, params_rate(params));
302 }
303
304 static int tas2770_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
305 {
306         struct snd_soc_component *component = dai->component;
307         struct tas2770_priv *tas2770 =
308                         snd_soc_component_get_drvdata(component);
309         u8 tdm_rx_start_slot = 0, invert_fpol = 0, fpol_preinv = 0, asi_cfg_1 = 0;
310         int ret;
311
312         switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
313         case SND_SOC_DAIFMT_CBC_CFC:
314                 break;
315         default:
316                 dev_err(tas2770->dev, "ASI invalid DAI clocking\n");
317                 return -EINVAL;
318         }
319
320         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
321         case SND_SOC_DAIFMT_NB_IF:
322                 invert_fpol = 1;
323                 fallthrough;
324         case SND_SOC_DAIFMT_NB_NF:
325                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_RSING;
326                 break;
327         case SND_SOC_DAIFMT_IB_IF:
328                 invert_fpol = 1;
329                 fallthrough;
330         case SND_SOC_DAIFMT_IB_NF:
331                 asi_cfg_1 |= TAS2770_TDM_CFG_REG1_RX_FALING;
332                 break;
333         default:
334                 dev_err(tas2770->dev, "ASI format Inverse is not found\n");
335                 return -EINVAL;
336         }
337
338         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
339                                             TAS2770_TDM_CFG_REG1_RX_MASK,
340                                             asi_cfg_1);
341         if (ret < 0)
342                 return ret;
343
344         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
345         case SND_SOC_DAIFMT_I2S:
346                 tdm_rx_start_slot = 1;
347                 fpol_preinv = 0;
348                 break;
349         case SND_SOC_DAIFMT_DSP_A:
350                 tdm_rx_start_slot = 0;
351                 fpol_preinv = 1;
352                 break;
353         case SND_SOC_DAIFMT_DSP_B:
354                 tdm_rx_start_slot = 1;
355                 fpol_preinv = 1;
356                 break;
357         case SND_SOC_DAIFMT_LEFT_J:
358                 tdm_rx_start_slot = 0;
359                 fpol_preinv = 1;
360                 break;
361         default:
362                 dev_err(tas2770->dev,
363                         "DAI Format is not found, fmt=0x%x\n", fmt);
364                 return -EINVAL;
365         }
366
367         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG1,
368                                             TAS2770_TDM_CFG_REG1_MASK,
369                                             (tdm_rx_start_slot << TAS2770_TDM_CFG_REG1_51_SHIFT));
370         if (ret < 0)
371                 return ret;
372
373         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG0,
374                                             TAS2770_TDM_CFG_REG0_FPOL_MASK,
375                                             (fpol_preinv ^ invert_fpol)
376                                              ? TAS2770_TDM_CFG_REG0_FPOL_RSING
377                                              : TAS2770_TDM_CFG_REG0_FPOL_FALING);
378         if (ret < 0)
379                 return ret;
380
381         return 0;
382 }
383
384 static int tas2770_set_dai_tdm_slot(struct snd_soc_dai *dai,
385                                 unsigned int tx_mask,
386                                 unsigned int rx_mask,
387                                 int slots, int slot_width)
388 {
389         struct snd_soc_component *component = dai->component;
390         int left_slot, right_slot;
391         int ret;
392
393         if (tx_mask == 0 || rx_mask != 0)
394                 return -EINVAL;
395
396         left_slot = __ffs(tx_mask);
397         tx_mask &= ~(1 << left_slot);
398         if (tx_mask == 0) {
399                 right_slot = left_slot;
400         } else {
401                 right_slot = __ffs(tx_mask);
402                 tx_mask &= ~(1 << right_slot);
403         }
404
405         if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
406                 return -EINVAL;
407
408         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
409                                             TAS2770_TDM_CFG_REG3_30_MASK,
410                                             (left_slot << TAS2770_TDM_CFG_REG3_30_SHIFT));
411         if (ret < 0)
412                 return ret;
413         ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG3,
414                                             TAS2770_TDM_CFG_REG3_RXS_MASK,
415                                             (right_slot << TAS2770_TDM_CFG_REG3_RXS_SHIFT));
416         if (ret < 0)
417                 return ret;
418
419         switch (slot_width) {
420         case 16:
421                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
422                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
423                                                     TAS2770_TDM_CFG_REG2_RXS_16BITS);
424                 break;
425         case 24:
426                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
427                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
428                                                     TAS2770_TDM_CFG_REG2_RXS_24BITS);
429                 break;
430         case 32:
431                 ret = snd_soc_component_update_bits(component, TAS2770_TDM_CFG_REG2,
432                                                     TAS2770_TDM_CFG_REG2_RXS_MASK,
433                                                     TAS2770_TDM_CFG_REG2_RXS_32BITS);
434                 break;
435         case 0:
436                 /* Do not change slot width */
437                 ret = 0;
438                 break;
439         default:
440                 ret = -EINVAL;
441         }
442
443         if (ret < 0)
444                 return ret;
445
446         return 0;
447 }
448
449 static const struct snd_soc_dai_ops tas2770_dai_ops = {
450         .mute_stream = tas2770_mute,
451         .hw_params  = tas2770_hw_params,
452         .set_fmt    = tas2770_set_fmt,
453         .set_tdm_slot = tas2770_set_dai_tdm_slot,
454         .no_capture_mute = 1,
455 };
456
457 #define TAS2770_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
458                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
459
460 #define TAS2770_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
461                                            SNDRV_PCM_RATE_96000 |\
462                                             SNDRV_PCM_RATE_192000\
463                                           )
464
465 static struct snd_soc_dai_driver tas2770_dai_driver[] = {
466         {
467                 .name = "tas2770 ASI1",
468                 .id = 0,
469                 .playback = {
470                         .stream_name    = "ASI1 Playback",
471                         .channels_min   = 1,
472                         .channels_max   = 2,
473                         .rates      = TAS2770_RATES,
474                         .formats    = TAS2770_FORMATS,
475                 },
476                 .capture = {
477                         .stream_name    = "ASI1 Capture",
478                         .channels_min   = 0,
479                         .channels_max   = 2,
480                         .rates          = TAS2770_RATES,
481                         .formats    = TAS2770_FORMATS,
482                 },
483                 .ops = &tas2770_dai_ops,
484                 .symmetric_rate = 1,
485         },
486 };
487
488 static const struct regmap_config tas2770_i2c_regmap;
489
490 static int tas2770_codec_probe(struct snd_soc_component *component)
491 {
492         struct tas2770_priv *tas2770 =
493                         snd_soc_component_get_drvdata(component);
494
495         tas2770->component = component;
496
497         if (tas2770->sdz_gpio) {
498                 gpiod_set_value_cansleep(tas2770->sdz_gpio, 1);
499                 usleep_range(1000, 2000);
500         }
501
502         tas2770_reset(tas2770);
503         regmap_reinit_cache(tas2770->regmap, &tas2770_i2c_regmap);
504
505         return 0;
506 }
507
508 static DECLARE_TLV_DB_SCALE(tas2770_digital_tlv, 1100, 50, 0);
509 static DECLARE_TLV_DB_SCALE(tas2770_playback_volume, -12750, 50, 0);
510
511 static const struct snd_kcontrol_new tas2770_snd_controls[] = {
512         SOC_SINGLE_TLV("Speaker Playback Volume", TAS2770_PLAY_CFG_REG2,
513                        0, TAS2770_PLAY_CFG_REG2_VMAX, 1, tas2770_playback_volume),
514         SOC_SINGLE_TLV("Amp Gain Volume", TAS2770_PLAY_CFG_REG0, 0, 0x14, 0,
515                        tas2770_digital_tlv),
516 };
517
518 static const struct snd_soc_component_driver soc_component_driver_tas2770 = {
519         .probe                  = tas2770_codec_probe,
520         .suspend                = tas2770_codec_suspend,
521         .resume                 = tas2770_codec_resume,
522         .controls               = tas2770_snd_controls,
523         .num_controls           = ARRAY_SIZE(tas2770_snd_controls),
524         .dapm_widgets           = tas2770_dapm_widgets,
525         .num_dapm_widgets       = ARRAY_SIZE(tas2770_dapm_widgets),
526         .dapm_routes            = tas2770_audio_map,
527         .num_dapm_routes        = ARRAY_SIZE(tas2770_audio_map),
528         .idle_bias_on           = 1,
529         .endianness             = 1,
530 };
531
532 static int tas2770_register_codec(struct tas2770_priv *tas2770)
533 {
534         return devm_snd_soc_register_component(tas2770->dev,
535                 &soc_component_driver_tas2770,
536                 tas2770_dai_driver, ARRAY_SIZE(tas2770_dai_driver));
537 }
538
539 static const struct reg_default tas2770_reg_defaults[] = {
540         { TAS2770_PAGE, 0x00 },
541         { TAS2770_SW_RST, 0x00 },
542         { TAS2770_PWR_CTRL, 0x0e },
543         { TAS2770_PLAY_CFG_REG0, 0x10 },
544         { TAS2770_PLAY_CFG_REG1, 0x01 },
545         { TAS2770_PLAY_CFG_REG2, 0x00 },
546         { TAS2770_MSC_CFG_REG0, 0x07 },
547         { TAS2770_TDM_CFG_REG1, 0x02 },
548         { TAS2770_TDM_CFG_REG2, 0x0a },
549         { TAS2770_TDM_CFG_REG3, 0x10 },
550         { TAS2770_INT_MASK_REG0, 0xfc },
551         { TAS2770_INT_MASK_REG1, 0xb1 },
552         { TAS2770_INT_CFG, 0x05 },
553         { TAS2770_MISC_IRQ, 0x81 },
554         { TAS2770_CLK_CGF, 0x0c },
555
556 };
557
558 static bool tas2770_volatile(struct device *dev, unsigned int reg)
559 {
560         switch (reg) {
561         case TAS2770_PAGE: /* regmap implementation requires this */
562         case TAS2770_SW_RST: /* always clears after write */
563         case TAS2770_BO_PRV_REG0:/* has a self clearing bit */
564         case TAS2770_LVE_INT_REG0:
565         case TAS2770_LVE_INT_REG1:
566         case TAS2770_LAT_INT_REG0:/* Sticky interrupt flags */
567         case TAS2770_LAT_INT_REG1:/* Sticky interrupt flags */
568         case TAS2770_VBAT_MSB:
569         case TAS2770_VBAT_LSB:
570         case TAS2770_TEMP_MSB:
571         case TAS2770_TEMP_LSB:
572                 return true;
573         }
574
575         return false;
576 }
577
578 static bool tas2770_writeable(struct device *dev, unsigned int reg)
579 {
580         switch (reg) {
581         case TAS2770_LVE_INT_REG0:
582         case TAS2770_LVE_INT_REG1:
583         case TAS2770_LAT_INT_REG0:
584         case TAS2770_LAT_INT_REG1:
585         case TAS2770_VBAT_MSB:
586         case TAS2770_VBAT_LSB:
587         case TAS2770_TEMP_MSB:
588         case TAS2770_TEMP_LSB:
589         case TAS2770_TDM_CLK_DETC:
590         case TAS2770_REV_AND_GPID:
591                 return false;
592         }
593
594         return true;
595 }
596
597 static const struct regmap_range_cfg tas2770_regmap_ranges[] = {
598         {
599                 .range_min = 0,
600                 .range_max = 1 * 128,
601                 .selector_reg = TAS2770_PAGE,
602                 .selector_mask = 0xff,
603                 .selector_shift = 0,
604                 .window_start = 0,
605                 .window_len = 128,
606         },
607 };
608
609 static const struct regmap_config tas2770_i2c_regmap = {
610         .reg_bits = 8,
611         .val_bits = 8,
612         .writeable_reg = tas2770_writeable,
613         .volatile_reg = tas2770_volatile,
614         .reg_defaults = tas2770_reg_defaults,
615         .num_reg_defaults = ARRAY_SIZE(tas2770_reg_defaults),
616         .cache_type = REGCACHE_RBTREE,
617         .ranges = tas2770_regmap_ranges,
618         .num_ranges = ARRAY_SIZE(tas2770_regmap_ranges),
619         .max_register = 1 * 128,
620 };
621
622 static int tas2770_parse_dt(struct device *dev, struct tas2770_priv *tas2770)
623 {
624         int rc = 0;
625
626         rc = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
627                                       &tas2770->i_sense_slot);
628         if (rc) {
629                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
630                          "ti,imon-slot-no");
631
632                 tas2770->i_sense_slot = 0;
633         }
634
635         rc = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
636                                       &tas2770->v_sense_slot);
637         if (rc) {
638                 dev_info(tas2770->dev, "Property %s is missing setting default slot\n",
639                          "ti,vmon-slot-no");
640
641                 tas2770->v_sense_slot = 2;
642         }
643
644         tas2770->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
645         if (IS_ERR(tas2770->sdz_gpio)) {
646                 if (PTR_ERR(tas2770->sdz_gpio) == -EPROBE_DEFER)
647                         return -EPROBE_DEFER;
648
649                 tas2770->sdz_gpio = NULL;
650         }
651
652         return 0;
653 }
654
655 static int tas2770_i2c_probe(struct i2c_client *client)
656 {
657         struct tas2770_priv *tas2770;
658         int result;
659
660         tas2770 = devm_kzalloc(&client->dev, sizeof(struct tas2770_priv),
661                                GFP_KERNEL);
662         if (!tas2770)
663                 return -ENOMEM;
664
665         tas2770->dev = &client->dev;
666         i2c_set_clientdata(client, tas2770);
667         dev_set_drvdata(&client->dev, tas2770);
668
669         tas2770->regmap = devm_regmap_init_i2c(client, &tas2770_i2c_regmap);
670         if (IS_ERR(tas2770->regmap)) {
671                 result = PTR_ERR(tas2770->regmap);
672                 dev_err(&client->dev, "Failed to allocate register map: %d\n",
673                         result);
674                 return result;
675         }
676
677         if (client->dev.of_node) {
678                 result = tas2770_parse_dt(&client->dev, tas2770);
679                 if (result) {
680                         dev_err(tas2770->dev, "%s: Failed to parse devicetree\n",
681                                 __func__);
682                         return result;
683                 }
684         }
685
686         tas2770->reset_gpio = devm_gpiod_get_optional(tas2770->dev, "reset",
687                                                       GPIOD_OUT_HIGH);
688         if (IS_ERR(tas2770->reset_gpio)) {
689                 if (PTR_ERR(tas2770->reset_gpio) == -EPROBE_DEFER) {
690                         tas2770->reset_gpio = NULL;
691                         return -EPROBE_DEFER;
692                 }
693         }
694
695         result = tas2770_register_codec(tas2770);
696         if (result)
697                 dev_err(tas2770->dev, "Register codec failed.\n");
698
699         return result;
700 }
701
702 static const struct i2c_device_id tas2770_i2c_id[] = {
703         { "tas2770"},
704         { }
705 };
706 MODULE_DEVICE_TABLE(i2c, tas2770_i2c_id);
707
708 #if defined(CONFIG_OF)
709 static const struct of_device_id tas2770_of_match[] = {
710         { .compatible = "ti,tas2770" },
711         {},
712 };
713 MODULE_DEVICE_TABLE(of, tas2770_of_match);
714 #endif
715
716 static struct i2c_driver tas2770_i2c_driver = {
717         .driver = {
718                 .name   = "tas2770",
719                 .of_match_table = of_match_ptr(tas2770_of_match),
720         },
721         .probe      = tas2770_i2c_probe,
722         .id_table   = tas2770_i2c_id,
723 };
724 module_i2c_driver(tas2770_i2c_driver);
725
726 MODULE_AUTHOR("Shi Fu <[email protected]>");
727 MODULE_DESCRIPTION("TAS2770 I2C Smart Amplifier driver");
728 MODULE_LICENSE("GPL v2");
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