1 | // SPDX-License-Identifier: GPL-2.0 |
2 | // |
3 | // Driver for the TAS5805M Audio Amplifier |
4 | // |
5 | // Author: Andy Liu <andy-liu@ti.com> |
6 | // Author: Daniel Beer <daniel.beer@igorinstitute.com> |
7 | // |
8 | // This is based on a driver originally written by Andy Liu at TI and |
9 | // posted here: |
10 | // |
11 | // https://e2e.ti.com/support/audio-group/audio/f/audio-forum/722027/linux-tas5825m-linux-drivers |
12 | // |
13 | // It has been simplified a little and reworked for the 5.x ALSA SoC API. |
14 | |
15 | #include <linux/module.h> |
16 | #include <linux/moduleparam.h> |
17 | #include <linux/kernel.h> |
18 | #include <linux/firmware.h> |
19 | #include <linux/slab.h> |
20 | #include <linux/of.h> |
21 | #include <linux/init.h> |
22 | #include <linux/i2c.h> |
23 | #include <linux/regmap.h> |
24 | #include <linux/gpio/consumer.h> |
25 | #include <linux/regulator/consumer.h> |
26 | #include <linux/atomic.h> |
27 | #include <linux/workqueue.h> |
28 | |
29 | #include <sound/soc.h> |
30 | #include <sound/pcm.h> |
31 | #include <sound/initval.h> |
32 | |
33 | /* Datasheet-defined registers on page 0, book 0 */ |
34 | #define REG_PAGE 0x00 |
35 | #define REG_DEVICE_CTRL_1 0x02 |
36 | #define REG_DEVICE_CTRL_2 0x03 |
37 | #define REG_SIG_CH_CTRL 0x28 |
38 | #define REG_SAP_CTRL_1 0x33 |
39 | #define REG_FS_MON 0x37 |
40 | #define REG_BCK_MON 0x38 |
41 | #define REG_CLKDET_STATUS 0x39 |
42 | #define REG_VOL_CTL 0x4c |
43 | #define REG_AGAIN 0x54 |
44 | #define REG_ADR_PIN_CTRL 0x60 |
45 | #define REG_ADR_PIN_CONFIG 0x61 |
46 | #define REG_CHAN_FAULT 0x70 |
47 | #define REG_GLOBAL_FAULT1 0x71 |
48 | #define REG_GLOBAL_FAULT2 0x72 |
49 | #define REG_FAULT 0x78 |
50 | #define REG_BOOK 0x7f |
51 | |
52 | /* DEVICE_CTRL_2 register values */ |
53 | #define DCTRL2_MODE_DEEP_SLEEP 0x00 |
54 | #define DCTRL2_MODE_SLEEP 0x01 |
55 | #define DCTRL2_MODE_HIZ 0x02 |
56 | #define DCTRL2_MODE_PLAY 0x03 |
57 | |
58 | #define DCTRL2_MUTE 0x08 |
59 | #define DCTRL2_DIS_DSP 0x10 |
60 | |
61 | /* This sequence of register writes must always be sent, prior to the |
62 | * 5ms delay while we wait for the DSP to boot. |
63 | */ |
64 | static const uint8_t dsp_cfg_preboot[] = { |
65 | 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, 0x01, 0x11, |
66 | 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, |
67 | 0x00, 0x00, 0x7f, 0x00, 0x03, 0x02, |
68 | }; |
69 | |
70 | static const uint32_t tas5805m_volume[] = { |
71 | 0x0000001B, /* 0, -110dB */ 0x0000001E, /* 1, -109dB */ |
72 | 0x00000021, /* 2, -108dB */ 0x00000025, /* 3, -107dB */ |
73 | 0x0000002A, /* 4, -106dB */ 0x0000002F, /* 5, -105dB */ |
74 | 0x00000035, /* 6, -104dB */ 0x0000003B, /* 7, -103dB */ |
75 | 0x00000043, /* 8, -102dB */ 0x0000004B, /* 9, -101dB */ |
76 | 0x00000054, /* 10, -100dB */ 0x0000005E, /* 11, -99dB */ |
77 | 0x0000006A, /* 12, -98dB */ 0x00000076, /* 13, -97dB */ |
78 | 0x00000085, /* 14, -96dB */ 0x00000095, /* 15, -95dB */ |
79 | 0x000000A7, /* 16, -94dB */ 0x000000BC, /* 17, -93dB */ |
80 | 0x000000D3, /* 18, -92dB */ 0x000000EC, /* 19, -91dB */ |
81 | 0x00000109, /* 20, -90dB */ 0x0000012A, /* 21, -89dB */ |
82 | 0x0000014E, /* 22, -88dB */ 0x00000177, /* 23, -87dB */ |
83 | 0x000001A4, /* 24, -86dB */ 0x000001D8, /* 25, -85dB */ |
84 | 0x00000211, /* 26, -84dB */ 0x00000252, /* 27, -83dB */ |
85 | 0x0000029A, /* 28, -82dB */ 0x000002EC, /* 29, -81dB */ |
86 | 0x00000347, /* 30, -80dB */ 0x000003AD, /* 31, -79dB */ |
87 | 0x00000420, /* 32, -78dB */ 0x000004A1, /* 33, -77dB */ |
88 | 0x00000532, /* 34, -76dB */ 0x000005D4, /* 35, -75dB */ |
89 | 0x0000068A, /* 36, -74dB */ 0x00000756, /* 37, -73dB */ |
90 | 0x0000083B, /* 38, -72dB */ 0x0000093C, /* 39, -71dB */ |
91 | 0x00000A5D, /* 40, -70dB */ 0x00000BA0, /* 41, -69dB */ |
92 | 0x00000D0C, /* 42, -68dB */ 0x00000EA3, /* 43, -67dB */ |
93 | 0x0000106C, /* 44, -66dB */ 0x0000126D, /* 45, -65dB */ |
94 | 0x000014AD, /* 46, -64dB */ 0x00001733, /* 47, -63dB */ |
95 | 0x00001A07, /* 48, -62dB */ 0x00001D34, /* 49, -61dB */ |
96 | 0x000020C5, /* 50, -60dB */ 0x000024C4, /* 51, -59dB */ |
97 | 0x00002941, /* 52, -58dB */ 0x00002E49, /* 53, -57dB */ |
98 | 0x000033EF, /* 54, -56dB */ 0x00003A45, /* 55, -55dB */ |
99 | 0x00004161, /* 56, -54dB */ 0x0000495C, /* 57, -53dB */ |
100 | 0x0000524F, /* 58, -52dB */ 0x00005C5A, /* 59, -51dB */ |
101 | 0x0000679F, /* 60, -50dB */ 0x00007444, /* 61, -49dB */ |
102 | 0x00008274, /* 62, -48dB */ 0x0000925F, /* 63, -47dB */ |
103 | 0x0000A43B, /* 64, -46dB */ 0x0000B845, /* 65, -45dB */ |
104 | 0x0000CEC1, /* 66, -44dB */ 0x0000E7FB, /* 67, -43dB */ |
105 | 0x00010449, /* 68, -42dB */ 0x0001240C, /* 69, -41dB */ |
106 | 0x000147AE, /* 70, -40dB */ 0x00016FAA, /* 71, -39dB */ |
107 | 0x00019C86, /* 72, -38dB */ 0x0001CEDC, /* 73, -37dB */ |
108 | 0x00020756, /* 74, -36dB */ 0x000246B5, /* 75, -35dB */ |
109 | 0x00028DCF, /* 76, -34dB */ 0x0002DD96, /* 77, -33dB */ |
110 | 0x00033718, /* 78, -32dB */ 0x00039B87, /* 79, -31dB */ |
111 | 0x00040C37, /* 80, -30dB */ 0x00048AA7, /* 81, -29dB */ |
112 | 0x00051884, /* 82, -28dB */ 0x0005B7B1, /* 83, -27dB */ |
113 | 0x00066A4A, /* 84, -26dB */ 0x000732AE, /* 85, -25dB */ |
114 | 0x00081385, /* 86, -24dB */ 0x00090FCC, /* 87, -23dB */ |
115 | 0x000A2ADB, /* 88, -22dB */ 0x000B6873, /* 89, -21dB */ |
116 | 0x000CCCCD, /* 90, -20dB */ 0x000E5CA1, /* 91, -19dB */ |
117 | 0x00101D3F, /* 92, -18dB */ 0x0012149A, /* 93, -17dB */ |
118 | 0x00144961, /* 94, -16dB */ 0x0016C311, /* 95, -15dB */ |
119 | 0x00198A13, /* 96, -14dB */ 0x001CA7D7, /* 97, -13dB */ |
120 | 0x002026F3, /* 98, -12dB */ 0x00241347, /* 99, -11dB */ |
121 | 0x00287A27, /* 100, -10dB */ 0x002D6A86, /* 101, -9dB */ |
122 | 0x0032F52D, /* 102, -8dB */ 0x00392CEE, /* 103, -7dB */ |
123 | 0x004026E7, /* 104, -6dB */ 0x0047FACD, /* 105, -5dB */ |
124 | 0x0050C336, /* 106, -4dB */ 0x005A9DF8, /* 107, -3dB */ |
125 | 0x0065AC8C, /* 108, -2dB */ 0x00721483, /* 109, -1dB */ |
126 | 0x00800000, /* 110, 0dB */ 0x008F9E4D, /* 111, 1dB */ |
127 | 0x00A12478, /* 112, 2dB */ 0x00B4CE08, /* 113, 3dB */ |
128 | 0x00CADDC8, /* 114, 4dB */ 0x00E39EA9, /* 115, 5dB */ |
129 | 0x00FF64C1, /* 116, 6dB */ 0x011E8E6A, /* 117, 7dB */ |
130 | 0x0141857F, /* 118, 8dB */ 0x0168C0C6, /* 119, 9dB */ |
131 | 0x0194C584, /* 120, 10dB */ 0x01C62940, /* 121, 11dB */ |
132 | 0x01FD93C2, /* 122, 12dB */ 0x023BC148, /* 123, 13dB */ |
133 | 0x02818508, /* 124, 14dB */ 0x02CFCC01, /* 125, 15dB */ |
134 | 0x0327A01A, /* 126, 16dB */ 0x038A2BAD, /* 127, 17dB */ |
135 | 0x03F8BD7A, /* 128, 18dB */ 0x0474CD1B, /* 129, 19dB */ |
136 | 0x05000000, /* 130, 20dB */ 0x059C2F02, /* 131, 21dB */ |
137 | 0x064B6CAE, /* 132, 22dB */ 0x07100C4D, /* 133, 23dB */ |
138 | 0x07ECA9CD, /* 134, 24dB */ 0x08E43299, /* 135, 25dB */ |
139 | 0x09F9EF8E, /* 136, 26dB */ 0x0B319025, /* 137, 27dB */ |
140 | 0x0C8F36F2, /* 138, 28dB */ 0x0E1787B8, /* 139, 29dB */ |
141 | 0x0FCFB725, /* 140, 30dB */ 0x11BD9C84, /* 141, 31dB */ |
142 | 0x13E7C594, /* 142, 32dB */ 0x16558CCB, /* 143, 33dB */ |
143 | 0x190F3254, /* 144, 34dB */ 0x1C1DF80E, /* 145, 35dB */ |
144 | 0x1F8C4107, /* 146, 36dB */ 0x2365B4BF, /* 147, 37dB */ |
145 | 0x27B766C2, /* 148, 38dB */ 0x2C900313, /* 149, 39dB */ |
146 | 0x32000000, /* 150, 40dB */ 0x3819D612, /* 151, 41dB */ |
147 | 0x3EF23ECA, /* 152, 42dB */ 0x46A07B07, /* 153, 43dB */ |
148 | 0x4F3EA203, /* 154, 44dB */ 0x58E9F9F9, /* 155, 45dB */ |
149 | 0x63C35B8E, /* 156, 46dB */ 0x6FEFA16D, /* 157, 47dB */ |
150 | 0x7D982575, /* 158, 48dB */ |
151 | }; |
152 | |
153 | #define TAS5805M_VOLUME_MAX ((int)ARRAY_SIZE(tas5805m_volume) - 1) |
154 | #define TAS5805M_VOLUME_MIN 0 |
155 | |
156 | struct tas5805m_priv { |
157 | struct i2c_client *i2c; |
158 | struct regulator *pvdd; |
159 | struct gpio_desc *gpio_pdn_n; |
160 | |
161 | uint8_t *dsp_cfg_data; |
162 | int dsp_cfg_len; |
163 | |
164 | struct regmap *regmap; |
165 | |
166 | int vol[2]; |
167 | bool is_powered; |
168 | bool is_muted; |
169 | |
170 | struct work_struct work; |
171 | struct mutex lock; |
172 | }; |
173 | |
174 | static void set_dsp_scale(struct regmap *rm, int offset, int vol) |
175 | { |
176 | uint8_t v[4]; |
177 | uint32_t x = tas5805m_volume[vol]; |
178 | int i; |
179 | |
180 | for (i = 0; i < 4; i++) { |
181 | v[3 - i] = x; |
182 | x >>= 8; |
183 | } |
184 | |
185 | regmap_bulk_write(map: rm, reg: offset, val: v, ARRAY_SIZE(v)); |
186 | } |
187 | |
188 | static void tas5805m_refresh(struct tas5805m_priv *tas5805m) |
189 | { |
190 | struct regmap *rm = tas5805m->regmap; |
191 | |
192 | dev_dbg(&tas5805m->i2c->dev, "refresh: is_muted=%d, vol=%d/%d\n" , |
193 | tas5805m->is_muted, tas5805m->vol[0], tas5805m->vol[1]); |
194 | |
195 | regmap_write(map: rm, REG_PAGE, val: 0x00); |
196 | regmap_write(map: rm, REG_BOOK, val: 0x8c); |
197 | regmap_write(map: rm, REG_PAGE, val: 0x2a); |
198 | |
199 | /* Refresh volume. The actual volume control documented in the |
200 | * datasheet doesn't seem to work correctly. This is a pair of |
201 | * DSP registers which are *not* documented in the datasheet. |
202 | */ |
203 | set_dsp_scale(rm, offset: 0x24, vol: tas5805m->vol[0]); |
204 | set_dsp_scale(rm, offset: 0x28, vol: tas5805m->vol[1]); |
205 | |
206 | regmap_write(map: rm, REG_PAGE, val: 0x00); |
207 | regmap_write(map: rm, REG_BOOK, val: 0x00); |
208 | |
209 | /* Set/clear digital soft-mute */ |
210 | regmap_write(map: rm, REG_DEVICE_CTRL_2, |
211 | val: (tas5805m->is_muted ? DCTRL2_MUTE : 0) | |
212 | DCTRL2_MODE_PLAY); |
213 | } |
214 | |
215 | static int tas5805m_vol_info(struct snd_kcontrol *kcontrol, |
216 | struct snd_ctl_elem_info *uinfo) |
217 | { |
218 | uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER; |
219 | uinfo->count = 2; |
220 | |
221 | uinfo->value.integer.min = TAS5805M_VOLUME_MIN; |
222 | uinfo->value.integer.max = TAS5805M_VOLUME_MAX; |
223 | return 0; |
224 | } |
225 | |
226 | static int tas5805m_vol_get(struct snd_kcontrol *kcontrol, |
227 | struct snd_ctl_elem_value *ucontrol) |
228 | { |
229 | struct snd_soc_component *component = |
230 | snd_soc_kcontrol_component(kcontrol); |
231 | struct tas5805m_priv *tas5805m = |
232 | snd_soc_component_get_drvdata(c: component); |
233 | |
234 | mutex_lock(&tas5805m->lock); |
235 | ucontrol->value.integer.value[0] = tas5805m->vol[0]; |
236 | ucontrol->value.integer.value[1] = tas5805m->vol[1]; |
237 | mutex_unlock(lock: &tas5805m->lock); |
238 | |
239 | return 0; |
240 | } |
241 | |
242 | static inline int volume_is_valid(int v) |
243 | { |
244 | return (v >= TAS5805M_VOLUME_MIN) && (v <= TAS5805M_VOLUME_MAX); |
245 | } |
246 | |
247 | static int tas5805m_vol_put(struct snd_kcontrol *kcontrol, |
248 | struct snd_ctl_elem_value *ucontrol) |
249 | { |
250 | struct snd_soc_component *component = |
251 | snd_soc_kcontrol_component(kcontrol); |
252 | struct tas5805m_priv *tas5805m = |
253 | snd_soc_component_get_drvdata(c: component); |
254 | int ret = 0; |
255 | |
256 | if (!(volume_is_valid(v: ucontrol->value.integer.value[0]) && |
257 | volume_is_valid(v: ucontrol->value.integer.value[1]))) |
258 | return -EINVAL; |
259 | |
260 | mutex_lock(&tas5805m->lock); |
261 | if (tas5805m->vol[0] != ucontrol->value.integer.value[0] || |
262 | tas5805m->vol[1] != ucontrol->value.integer.value[1]) { |
263 | tas5805m->vol[0] = ucontrol->value.integer.value[0]; |
264 | tas5805m->vol[1] = ucontrol->value.integer.value[1]; |
265 | dev_dbg(component->dev, "set vol=%d/%d (is_powered=%d)\n" , |
266 | tas5805m->vol[0], tas5805m->vol[1], |
267 | tas5805m->is_powered); |
268 | if (tas5805m->is_powered) |
269 | tas5805m_refresh(tas5805m); |
270 | ret = 1; |
271 | } |
272 | mutex_unlock(lock: &tas5805m->lock); |
273 | |
274 | return ret; |
275 | } |
276 | |
277 | static const struct snd_kcontrol_new tas5805m_snd_controls[] = { |
278 | { |
279 | .iface = SNDRV_CTL_ELEM_IFACE_MIXER, |
280 | .name = "Master Playback Volume" , |
281 | .access = SNDRV_CTL_ELEM_ACCESS_TLV_READ | |
282 | SNDRV_CTL_ELEM_ACCESS_READWRITE, |
283 | .info = tas5805m_vol_info, |
284 | .get = tas5805m_vol_get, |
285 | .put = tas5805m_vol_put, |
286 | }, |
287 | }; |
288 | |
289 | static void send_cfg(struct regmap *rm, |
290 | const uint8_t *s, unsigned int len) |
291 | { |
292 | unsigned int i; |
293 | |
294 | for (i = 0; i + 1 < len; i += 2) |
295 | regmap_write(map: rm, reg: s[i], val: s[i + 1]); |
296 | } |
297 | |
298 | /* The TAS5805M DSP can't be configured until the I2S clock has been |
299 | * present and stable for 5ms, or else it won't boot and we get no |
300 | * sound. |
301 | */ |
302 | static int tas5805m_trigger(struct snd_pcm_substream *substream, int cmd, |
303 | struct snd_soc_dai *dai) |
304 | { |
305 | struct snd_soc_component *component = dai->component; |
306 | struct tas5805m_priv *tas5805m = |
307 | snd_soc_component_get_drvdata(c: component); |
308 | |
309 | switch (cmd) { |
310 | case SNDRV_PCM_TRIGGER_START: |
311 | case SNDRV_PCM_TRIGGER_RESUME: |
312 | case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: |
313 | dev_dbg(component->dev, "clock start\n" ); |
314 | schedule_work(work: &tas5805m->work); |
315 | break; |
316 | |
317 | case SNDRV_PCM_TRIGGER_STOP: |
318 | case SNDRV_PCM_TRIGGER_SUSPEND: |
319 | case SNDRV_PCM_TRIGGER_PAUSE_PUSH: |
320 | break; |
321 | |
322 | default: |
323 | return -EINVAL; |
324 | } |
325 | |
326 | return 0; |
327 | } |
328 | |
329 | static void do_work(struct work_struct *work) |
330 | { |
331 | struct tas5805m_priv *tas5805m = |
332 | container_of(work, struct tas5805m_priv, work); |
333 | struct regmap *rm = tas5805m->regmap; |
334 | |
335 | dev_dbg(&tas5805m->i2c->dev, "DSP startup\n" ); |
336 | |
337 | mutex_lock(&tas5805m->lock); |
338 | /* We mustn't issue any I2C transactions until the I2S |
339 | * clock is stable. Furthermore, we must allow a 5ms |
340 | * delay after the first set of register writes to |
341 | * allow the DSP to boot before configuring it. |
342 | */ |
343 | usleep_range(min: 5000, max: 10000); |
344 | send_cfg(rm, s: dsp_cfg_preboot, ARRAY_SIZE(dsp_cfg_preboot)); |
345 | usleep_range(min: 5000, max: 15000); |
346 | send_cfg(rm, s: tas5805m->dsp_cfg_data, len: tas5805m->dsp_cfg_len); |
347 | |
348 | tas5805m->is_powered = true; |
349 | tas5805m_refresh(tas5805m); |
350 | mutex_unlock(lock: &tas5805m->lock); |
351 | } |
352 | |
353 | static int tas5805m_dac_event(struct snd_soc_dapm_widget *w, |
354 | struct snd_kcontrol *kcontrol, int event) |
355 | { |
356 | struct snd_soc_component *component = snd_soc_dapm_to_component(dapm: w->dapm); |
357 | struct tas5805m_priv *tas5805m = |
358 | snd_soc_component_get_drvdata(c: component); |
359 | struct regmap *rm = tas5805m->regmap; |
360 | |
361 | if (event & SND_SOC_DAPM_PRE_PMD) { |
362 | unsigned int chan, global1, global2; |
363 | |
364 | dev_dbg(component->dev, "DSP shutdown\n" ); |
365 | cancel_work_sync(work: &tas5805m->work); |
366 | |
367 | mutex_lock(&tas5805m->lock); |
368 | if (tas5805m->is_powered) { |
369 | tas5805m->is_powered = false; |
370 | |
371 | regmap_write(map: rm, REG_PAGE, val: 0x00); |
372 | regmap_write(map: rm, REG_BOOK, val: 0x00); |
373 | |
374 | regmap_read(map: rm, REG_CHAN_FAULT, val: &chan); |
375 | regmap_read(map: rm, REG_GLOBAL_FAULT1, val: &global1); |
376 | regmap_read(map: rm, REG_GLOBAL_FAULT2, val: &global2); |
377 | |
378 | dev_dbg(component->dev, "fault regs: CHAN=%02x, " |
379 | "GLOBAL1=%02x, GLOBAL2=%02x\n" , |
380 | chan, global1, global2); |
381 | |
382 | regmap_write(map: rm, REG_DEVICE_CTRL_2, DCTRL2_MODE_HIZ); |
383 | } |
384 | mutex_unlock(lock: &tas5805m->lock); |
385 | } |
386 | |
387 | return 0; |
388 | } |
389 | |
390 | static const struct snd_soc_dapm_route tas5805m_audio_map[] = { |
391 | { "DAC" , NULL, "DAC IN" }, |
392 | { "OUT" , NULL, "DAC" }, |
393 | }; |
394 | |
395 | static const struct snd_soc_dapm_widget tas5805m_dapm_widgets[] = { |
396 | SND_SOC_DAPM_AIF_IN("DAC IN" , "Playback" , 0, SND_SOC_NOPM, 0, 0), |
397 | SND_SOC_DAPM_DAC_E("DAC" , NULL, SND_SOC_NOPM, 0, 0, |
398 | tas5805m_dac_event, SND_SOC_DAPM_PRE_PMD), |
399 | SND_SOC_DAPM_OUTPUT("OUT" ) |
400 | }; |
401 | |
402 | static const struct snd_soc_component_driver soc_codec_dev_tas5805m = { |
403 | .controls = tas5805m_snd_controls, |
404 | .num_controls = ARRAY_SIZE(tas5805m_snd_controls), |
405 | .dapm_widgets = tas5805m_dapm_widgets, |
406 | .num_dapm_widgets = ARRAY_SIZE(tas5805m_dapm_widgets), |
407 | .dapm_routes = tas5805m_audio_map, |
408 | .num_dapm_routes = ARRAY_SIZE(tas5805m_audio_map), |
409 | .use_pmdown_time = 1, |
410 | .endianness = 1, |
411 | }; |
412 | |
413 | static int tas5805m_mute(struct snd_soc_dai *dai, int mute, int direction) |
414 | { |
415 | struct snd_soc_component *component = dai->component; |
416 | struct tas5805m_priv *tas5805m = |
417 | snd_soc_component_get_drvdata(c: component); |
418 | |
419 | mutex_lock(&tas5805m->lock); |
420 | dev_dbg(component->dev, "set mute=%d (is_powered=%d)\n" , |
421 | mute, tas5805m->is_powered); |
422 | |
423 | tas5805m->is_muted = mute; |
424 | if (tas5805m->is_powered) |
425 | tas5805m_refresh(tas5805m); |
426 | mutex_unlock(lock: &tas5805m->lock); |
427 | |
428 | return 0; |
429 | } |
430 | |
431 | static const struct snd_soc_dai_ops tas5805m_dai_ops = { |
432 | .trigger = tas5805m_trigger, |
433 | .mute_stream = tas5805m_mute, |
434 | .no_capture_mute = 1, |
435 | }; |
436 | |
437 | static struct snd_soc_dai_driver tas5805m_dai = { |
438 | .name = "tas5805m-amplifier" , |
439 | .playback = { |
440 | .stream_name = "Playback" , |
441 | .channels_min = 2, |
442 | .channels_max = 2, |
443 | .rates = SNDRV_PCM_RATE_48000, |
444 | .formats = SNDRV_PCM_FMTBIT_S32_LE, |
445 | }, |
446 | .ops = &tas5805m_dai_ops, |
447 | }; |
448 | |
449 | static const struct regmap_config tas5805m_regmap = { |
450 | .reg_bits = 8, |
451 | .val_bits = 8, |
452 | |
453 | /* We have quite a lot of multi-level bank switching and a |
454 | * relatively small number of register writes between bank |
455 | * switches. |
456 | */ |
457 | .cache_type = REGCACHE_NONE, |
458 | }; |
459 | |
460 | static int tas5805m_i2c_probe(struct i2c_client *i2c) |
461 | { |
462 | struct device *dev = &i2c->dev; |
463 | struct regmap *regmap; |
464 | struct tas5805m_priv *tas5805m; |
465 | char filename[128]; |
466 | const char *config_name; |
467 | const struct firmware *fw; |
468 | int ret; |
469 | |
470 | regmap = devm_regmap_init_i2c(i2c, &tas5805m_regmap); |
471 | if (IS_ERR(ptr: regmap)) { |
472 | ret = PTR_ERR(ptr: regmap); |
473 | dev_err(dev, "unable to allocate register map: %d\n" , ret); |
474 | return ret; |
475 | } |
476 | |
477 | tas5805m = devm_kzalloc(dev, size: sizeof(struct tas5805m_priv), GFP_KERNEL); |
478 | if (!tas5805m) |
479 | return -ENOMEM; |
480 | |
481 | tas5805m->i2c = i2c; |
482 | tas5805m->pvdd = devm_regulator_get(dev, id: "pvdd" ); |
483 | if (IS_ERR(ptr: tas5805m->pvdd)) { |
484 | dev_err(dev, "failed to get pvdd supply: %ld\n" , |
485 | PTR_ERR(tas5805m->pvdd)); |
486 | return PTR_ERR(ptr: tas5805m->pvdd); |
487 | } |
488 | |
489 | dev_set_drvdata(dev, data: tas5805m); |
490 | tas5805m->regmap = regmap; |
491 | tas5805m->gpio_pdn_n = devm_gpiod_get(dev, con_id: "pdn" , flags: GPIOD_OUT_LOW); |
492 | if (IS_ERR(ptr: tas5805m->gpio_pdn_n)) { |
493 | dev_err(dev, "error requesting PDN gpio: %ld\n" , |
494 | PTR_ERR(tas5805m->gpio_pdn_n)); |
495 | return PTR_ERR(ptr: tas5805m->gpio_pdn_n); |
496 | } |
497 | |
498 | /* This configuration must be generated by PPC3. The file loaded |
499 | * consists of a sequence of register writes, where bytes at |
500 | * even indices are register addresses and those at odd indices |
501 | * are register values. |
502 | * |
503 | * The fixed portion of PPC3's output prior to the 5ms delay |
504 | * should be omitted. |
505 | */ |
506 | if (device_property_read_string(dev, propname: "ti,dsp-config-name" , |
507 | val: &config_name)) |
508 | config_name = "default" ; |
509 | |
510 | snprintf(buf: filename, size: sizeof(filename), fmt: "tas5805m_dsp_%s.bin" , |
511 | config_name); |
512 | ret = request_firmware(fw: &fw, name: filename, device: dev); |
513 | if (ret) |
514 | return ret; |
515 | |
516 | if ((fw->size < 2) || (fw->size & 1)) { |
517 | dev_err(dev, "firmware is invalid\n" ); |
518 | release_firmware(fw); |
519 | return -EINVAL; |
520 | } |
521 | |
522 | tas5805m->dsp_cfg_len = fw->size; |
523 | tas5805m->dsp_cfg_data = devm_kmemdup(dev, src: fw->data, len: fw->size, GFP_KERNEL); |
524 | if (!tas5805m->dsp_cfg_data) { |
525 | release_firmware(fw); |
526 | return -ENOMEM; |
527 | } |
528 | |
529 | release_firmware(fw); |
530 | |
531 | /* Do the first part of the power-on here, while we can expect |
532 | * the I2S interface to be quiet. We must raise PDN# and then |
533 | * wait 5ms before any I2S clock is sent, or else the internal |
534 | * regulator apparently won't come on. |
535 | * |
536 | * Also, we must keep the device in power down for 100ms or so |
537 | * after PVDD is applied, or else the ADR pin is sampled |
538 | * incorrectly and the device comes up with an unpredictable I2C |
539 | * address. |
540 | */ |
541 | tas5805m->vol[0] = TAS5805M_VOLUME_MIN; |
542 | tas5805m->vol[1] = TAS5805M_VOLUME_MIN; |
543 | |
544 | ret = regulator_enable(regulator: tas5805m->pvdd); |
545 | if (ret < 0) { |
546 | dev_err(dev, "failed to enable pvdd: %d\n" , ret); |
547 | return ret; |
548 | } |
549 | |
550 | usleep_range(min: 100000, max: 150000); |
551 | gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 1); |
552 | usleep_range(min: 10000, max: 15000); |
553 | |
554 | INIT_WORK(&tas5805m->work, do_work); |
555 | mutex_init(&tas5805m->lock); |
556 | |
557 | /* Don't register through devm. We need to be able to unregister |
558 | * the component prior to deasserting PDN# |
559 | */ |
560 | ret = snd_soc_register_component(dev, component_driver: &soc_codec_dev_tas5805m, |
561 | dai_drv: &tas5805m_dai, num_dai: 1); |
562 | if (ret < 0) { |
563 | dev_err(dev, "unable to register codec: %d\n" , ret); |
564 | gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 0); |
565 | regulator_disable(regulator: tas5805m->pvdd); |
566 | return ret; |
567 | } |
568 | |
569 | return 0; |
570 | } |
571 | |
572 | static void tas5805m_i2c_remove(struct i2c_client *i2c) |
573 | { |
574 | struct device *dev = &i2c->dev; |
575 | struct tas5805m_priv *tas5805m = dev_get_drvdata(dev); |
576 | |
577 | cancel_work_sync(work: &tas5805m->work); |
578 | snd_soc_unregister_component(dev); |
579 | gpiod_set_value(desc: tas5805m->gpio_pdn_n, value: 0); |
580 | usleep_range(min: 10000, max: 15000); |
581 | regulator_disable(regulator: tas5805m->pvdd); |
582 | } |
583 | |
584 | static const struct i2c_device_id tas5805m_i2c_id[] = { |
585 | { "tas5805m" , }, |
586 | { } |
587 | }; |
588 | MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id); |
589 | |
590 | #if IS_ENABLED(CONFIG_OF) |
591 | static const struct of_device_id tas5805m_of_match[] = { |
592 | { .compatible = "ti,tas5805m" , }, |
593 | { } |
594 | }; |
595 | MODULE_DEVICE_TABLE(of, tas5805m_of_match); |
596 | #endif |
597 | |
598 | static struct i2c_driver tas5805m_i2c_driver = { |
599 | .probe = tas5805m_i2c_probe, |
600 | .remove = tas5805m_i2c_remove, |
601 | .id_table = tas5805m_i2c_id, |
602 | .driver = { |
603 | .name = "tas5805m" , |
604 | .of_match_table = of_match_ptr(tas5805m_of_match), |
605 | }, |
606 | }; |
607 | |
608 | module_i2c_driver(tas5805m_i2c_driver); |
609 | |
610 | MODULE_AUTHOR("Andy Liu <andy-liu@ti.com>" ); |
611 | MODULE_AUTHOR("Daniel Beer <daniel.beer@igorinstitute.com>" ); |
612 | MODULE_DESCRIPTION("TAS5805M Audio Amplifier Driver" ); |
613 | MODULE_LICENSE("GPL v2" ); |
614 | |