1 /*
2 ** =============================================================================
3 ** Copyright (c) 2016 Texas Instruments Inc.
4 **
5 ** This program is free software; you can redistribute it and/or modify it under
6 ** the terms of the GNU General Public License as published by the Free Software
7 ** Foundation; version 2.
8 **
9 ** This program is distributed in the hope that it will be useful, but WITHOUT
10 ** ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
11 ** FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
12 **
13 ** File:
14 ** tas2557-regmap.c
15 **
16 ** Description:
17 ** I2C driver with regmap for Texas Instruments TAS2557 High Performance 4W Smart Amplifier
18 **
19 ** =============================================================================
20 */
22 #ifdef CONFIG_TAS2557_REGMAP
24 #define DEBUG
25 #include <linux/module.h>
26 #include <linux/moduleparam.h>
27 #include <linux/init.h>
28 #include <linux/delay.h>
29 #include <linux/pm.h>
30 #include <linux/i2c.h>
31 #include <linux/gpio.h>
32 #include <linux/regulator/consumer.h>
33 #include <linux/firmware.h>
34 #include <linux/regmap.h>
35 #include <linux/of.h>
36 #include <linux/of_gpio.h>
37 #include <linux/slab.h>
38 #include <linux/syscalls.h>
39 #include <linux/fcntl.h>
40 #include <linux/uaccess.h>
41 #include "tas2557.h"
42 #include "tas2557-core.h"
44 #ifdef CONFIG_TAS2557_CODEC
45 #include "tas2557-codec.h"
46 #endif
48 #ifdef CONFIG_TAS2557_MISC
49 #include "tas2557-misc.h"
50 #endif
52 #define ENABLE_TILOAD
53 #ifdef ENABLE_TILOAD
54 #include "tiload.h"
55 #endif
57 #define LOW_TEMPERATURE_GAIN 6
58 #define LOW_TEMPERATURE_COUNTER 12
60 static int tas2557_change_book_page(
61 struct tas2557_priv *pTAS2557,
62 unsigned char nBook,
63 unsigned char nPage)
64 {
65 int nResult = 0;
67 if ((pTAS2557->mnCurrentBook == nBook)
68 && pTAS2557->mnCurrentPage == nPage)
69 goto end;
71 if (pTAS2557->mnCurrentBook != nBook) {
72 nResult = regmap_write(pTAS2557->mpRegmap, TAS2557_BOOKCTL_PAGE, 0);
73 if (nResult < 0) {
74 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
75 __func__, __LINE__, nResult);
76 goto end;
77 }
78 pTAS2557->mnCurrentPage = 0;
79 nResult = regmap_write(pTAS2557->mpRegmap, TAS2557_BOOKCTL_REG, nBook);
80 if (nResult < 0) {
81 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
82 __func__, __LINE__, nResult);
83 goto end;
84 }
85 pTAS2557->mnCurrentBook = nBook;
86 if (nPage != 0) {
87 nResult = regmap_write(pTAS2557->mpRegmap, TAS2557_BOOKCTL_PAGE, nPage);
88 if (nResult < 0) {
89 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
90 __func__, __LINE__, nResult);
91 goto end;
92 }
93 pTAS2557->mnCurrentPage = nPage;
94 }
95 } else if (pTAS2557->mnCurrentPage != nPage) {
96 nResult = regmap_write(pTAS2557->mpRegmap, TAS2557_BOOKCTL_PAGE, nPage);
97 if (nResult < 0) {
98 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
99 __func__, __LINE__, nResult);
100 goto end;
101 }
102 pTAS2557->mnCurrentPage = nPage;
103 }
105 end:
106 if (nResult < 0)
107 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
108 else
109 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
111 return nResult;
112 }
114 static int tas2557_dev_read(
115 struct tas2557_priv *pTAS2557,
116 unsigned int nRegister,
117 unsigned int *pValue)
118 {
119 int nResult = 0;
120 unsigned int Value = 0;
122 mutex_lock(&pTAS2557->dev_lock);
124 if (pTAS2557->mbTILoadActive) {
125 if (!(nRegister & 0x80000000))
126 goto end; /* let only reads from TILoad pass. */
127 nRegister &= ~0x80000000;
129 dev_dbg(pTAS2557->dev, "TiLoad R REG B[%d]P[%d]R[%d]\n",
130 TAS2557_BOOK_ID(nRegister),
131 TAS2557_PAGE_ID(nRegister),
132 TAS2557_PAGE_REG(nRegister));
133 }
135 nResult = tas2557_change_book_page(pTAS2557,
136 TAS2557_BOOK_ID(nRegister),
137 TAS2557_PAGE_ID(nRegister));
138 if (nResult >= 0) {
139 nResult = regmap_read(pTAS2557->mpRegmap, TAS2557_PAGE_REG(nRegister), &Value);
140 if (nResult < 0) {
141 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
142 __func__, __LINE__, nResult);
143 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
144 goto end;
145 } else
146 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
147 *pValue = Value;
148 }
150 end:
152 mutex_unlock(&pTAS2557->dev_lock);
153 return nResult;
154 }
156 static int tas2557_dev_write(
157 struct tas2557_priv *pTAS2557,
158 unsigned int nRegister,
159 unsigned int nValue)
160 {
161 int nResult = 0;
163 mutex_lock(&pTAS2557->dev_lock);
164 if ((nRegister == 0xAFFEAFFE) && (nValue == 0xBABEBABE)) {
165 pTAS2557->mbTILoadActive = true;
166 goto end;
167 }
169 if ((nRegister == 0xBABEBABE) && (nValue == 0xAFFEAFFE)) {
170 pTAS2557->mbTILoadActive = false;
171 goto end;
172 }
174 if (pTAS2557->mbTILoadActive) {
175 if (!(nRegister & 0x80000000))
176 goto end;/* let only writes from TILoad pass. */
177 nRegister &= ~0x80000000;
179 dev_dbg(pTAS2557->dev, "TiLoad W REG B[%d]P[%d]R[%d] =0x%x\n",
180 TAS2557_BOOK_ID(nRegister),
181 TAS2557_PAGE_ID(nRegister),
182 TAS2557_PAGE_REG(nRegister),
183 nValue);
184 }
186 nResult = tas2557_change_book_page(pTAS2557,
187 TAS2557_BOOK_ID(nRegister),
188 TAS2557_PAGE_ID(nRegister));
189 if (nResult >= 0) {
190 nResult = regmap_write(pTAS2557->mpRegmap, TAS2557_PAGE_REG(nRegister), nValue);
191 if (nResult < 0) {
192 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
193 __func__, __LINE__, nResult);
194 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
195 } else
196 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
197 }
199 end:
201 mutex_unlock(&pTAS2557->dev_lock);
203 return nResult;
204 }
206 static int tas2557_dev_bulk_read(
207 struct tas2557_priv *pTAS2557,
208 unsigned int nRegister,
209 u8 *pData,
210 unsigned int nLength)
211 {
212 int nResult = 0;
214 mutex_lock(&pTAS2557->dev_lock);
215 if (pTAS2557->mbTILoadActive) {
216 if (!(nRegister & 0x80000000))
217 goto end; /* let only writes from TILoad pass. */
219 nRegister &= ~0x80000000;
220 dev_dbg(pTAS2557->dev, "TiLoad BR REG B[%d]P[%d]R[%d], count=%d\n",
221 TAS2557_BOOK_ID(nRegister),
222 TAS2557_PAGE_ID(nRegister),
223 TAS2557_PAGE_REG(nRegister),
224 nLength);
225 }
227 nResult = tas2557_change_book_page(pTAS2557,
228 TAS2557_BOOK_ID(nRegister),
229 TAS2557_PAGE_ID(nRegister));
230 if (nResult >= 0) {
231 nResult = regmap_bulk_read(pTAS2557->mpRegmap, TAS2557_PAGE_REG(nRegister), pData, nLength);
232 if (nResult < 0) {
233 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
234 __func__, __LINE__, nResult);
235 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
236 } else
237 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
238 }
240 end:
242 mutex_unlock(&pTAS2557->dev_lock);
243 return nResult;
244 }
246 static int tas2557_dev_bulk_write(
247 struct tas2557_priv *pTAS2557,
248 unsigned int nRegister,
249 u8 *pData,
250 unsigned int nLength)
251 {
252 int nResult = 0;
254 mutex_lock(&pTAS2557->dev_lock);
255 if (pTAS2557->mbTILoadActive) {
256 if (!(nRegister & 0x80000000))
257 goto end; /* let only writes from TILoad pass. */
259 nRegister &= ~0x80000000;
261 dev_dbg(pTAS2557->dev, "TiLoad BW REG B[%d]P[%d]R[%d], count=%d\n",
262 TAS2557_BOOK_ID(nRegister),
263 TAS2557_PAGE_ID(nRegister),
264 TAS2557_PAGE_REG(nRegister),
265 nLength);
266 }
268 nResult = tas2557_change_book_page( pTAS2557,
269 TAS2557_BOOK_ID(nRegister),
270 TAS2557_PAGE_ID(nRegister));
271 if (nResult >= 0) {
272 nResult = regmap_bulk_write(pTAS2557->mpRegmap, TAS2557_PAGE_REG(nRegister), pData, nLength);
273 if (nResult < 0) {
274 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
275 __func__, __LINE__, nResult);
276 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
277 } else
278 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
279 }
281 end:
283 mutex_unlock(&pTAS2557->dev_lock);
284 return nResult;
285 }
287 static int tas2557_dev_update_bits(
288 struct tas2557_priv *pTAS2557,
289 unsigned int nRegister,
290 unsigned int nMask,
291 unsigned int nValue)
292 {
293 int nResult = 0;
295 mutex_lock(&pTAS2557->dev_lock);
297 if (pTAS2557->mbTILoadActive) {
298 if (!(nRegister & 0x80000000))
299 goto end; /* let only writes from TILoad pass. */
301 nRegister &= ~0x80000000;
302 dev_dbg(pTAS2557->dev, "TiLoad SB REG B[%d]P[%d]R[%d], mask=0x%x, value=0x%x\n",
303 TAS2557_BOOK_ID(nRegister),
304 TAS2557_PAGE_ID(nRegister),
305 TAS2557_PAGE_REG(nRegister),
306 nMask, nValue);
307 }
309 nResult = tas2557_change_book_page( pTAS2557,
310 TAS2557_BOOK_ID(nRegister),
311 TAS2557_PAGE_ID(nRegister));
312 if (nResult >= 0) {
313 nResult = regmap_update_bits(pTAS2557->mpRegmap, TAS2557_PAGE_REG(nRegister), nMask, nValue);
314 if (nResult < 0) {
315 dev_err(pTAS2557->dev, "%s, %d, I2C error %d\n",
316 __func__, __LINE__, nResult);
317 pTAS2557->mnErrCode |= ERROR_DEVA_I2C_COMM;
318 } else
319 pTAS2557->mnErrCode &= ~ERROR_DEVA_I2C_COMM;
320 }
322 end:
323 mutex_unlock(&pTAS2557->dev_lock);
324 return nResult;
325 }
327 void tas2557_clearIRQ(struct tas2557_priv *pTAS2557)
328 {
329 unsigned int nValue;
330 int nResult = 0;
332 nResult = pTAS2557->read(pTAS2557, TAS2557_FLAGS_1, &nValue);
333 if (nResult >= 0)
334 pTAS2557->read(pTAS2557, TAS2557_FLAGS_2, &nValue);
336 }
339 void tas2557_enableIRQ(struct tas2557_priv *pTAS2557, bool enable, bool startup_chk)
340 {
341 if (enable) {
342 if (!pTAS2557->mbIRQEnable) {
343 if (gpio_is_valid(pTAS2557->mnGpioINT)) {
344 enable_irq(pTAS2557->mnIRQ);
345 if (startup_chk) {
346 /* check after 10 ms */
347 schedule_delayed_work(&pTAS2557->irq_work, msecs_to_jiffies(10));
348 }
349 pTAS2557->mbIRQEnable = true;
350 }
351 }
352 } else {
353 if (gpio_is_valid(pTAS2557->mnGpioINT))
354 disable_irq_nosync(pTAS2557->mnIRQ);
355 pTAS2557->mbIRQEnable = false;
356 }
357 }
359 static void tas2557_hw_reset(struct tas2557_priv *pTAS2557)
360 {
361 if (gpio_is_valid(pTAS2557->mnResetGPIO)) {
362 gpio_direction_output(pTAS2557->mnResetGPIO, 0);
363 msleep(5);
364 gpio_direction_output(pTAS2557->mnResetGPIO, 1);
365 msleep(2);
366 }
368 pTAS2557->mnCurrentBook = -1;
369 pTAS2557->mnCurrentPage = -1;
370 if (pTAS2557->mnErrCode)
371 dev_info(pTAS2557->dev, "before reset, ErrCode=0x%x\n", pTAS2557->mnErrCode);
372 pTAS2557->mnErrCode = 0;
373 }
375 static void irq_work_routine(struct work_struct *work)
376 {
377 int nResult = 0;
378 unsigned int nDevInt1Status = 0, nDevInt2Status = 0;
379 unsigned int nDevPowerUpFlag = 0;
380 int nCounter = 2;
381 struct tas2557_priv *pTAS2557 =
382 container_of(work, struct tas2557_priv, irq_work.work);
384 #ifdef CONFIG_TAS2557_CODEC
385 mutex_lock(&pTAS2557->codec_lock);
386 #endif
388 #ifdef CONFIG_TAS2557_MISC
389 mutex_lock(&pTAS2557->file_lock);
390 #endif
392 if(pTAS2557->mnErrCode & ERROR_FAILSAFE)
393 goto program;
395 if (pTAS2557->mbRuntimeSuspend) {
396 dev_info(pTAS2557->dev, "%s, Runtime Suspended\n", __func__);
397 goto end;
398 }
400 if (!pTAS2557->mbPowerUp) {
401 dev_info(pTAS2557->dev, "%s, device not powered\n", __func__);
402 goto end;
403 }
405 if ((!pTAS2557->mpFirmware->mnConfigurations)
406 || (!pTAS2557->mpFirmware->mnPrograms)) {
407 dev_info(pTAS2557->dev, "%s, firmware not loaded\n", __func__);
408 goto end;
409 }
410 nResult = tas2557_dev_write(pTAS2557, TAS2557_GPIO4_PIN_REG, 0x00);
411 if (nResult < 0)
412 goto program;
413 nResult = tas2557_dev_read(pTAS2557, TAS2557_FLAGS_1, &nDevInt1Status);
414 if (nResult >= 0)
415 nResult = tas2557_dev_read(pTAS2557, TAS2557_FLAGS_2, &nDevInt2Status);
416 if (nResult < 0)
417 goto program;
419 if (((nDevInt1Status & 0xfc) != 0) || ((nDevInt2Status & 0x0c) != 0)) {
420 /* in case of INT_OC, INT_UV, INT_OT, INT_BO, INT_CL, INT_CLK1, INT_CLK2 */
421 dev_err(pTAS2557->dev, "critical error: 0x%x, 0x%x\n", nDevInt1Status, nDevInt2Status);
422 if (nDevInt1Status & 0x80) {
423 pTAS2557->mnErrCode |= ERROR_OVER_CURRENT;
424 dev_err(pTAS2557->dev, "DEVA SPK over current!\n");
425 } else
426 pTAS2557->mnErrCode &= ~ERROR_OVER_CURRENT;
428 if (nDevInt1Status & 0x40) {
429 pTAS2557->mnErrCode |= ERROR_UNDER_VOLTAGE;
430 dev_err(pTAS2557->dev, "DEVA SPK under voltage!\n");
431 } else
432 pTAS2557->mnErrCode &= ~ERROR_UNDER_VOLTAGE;
434 if (nDevInt1Status & 0x20) {
435 pTAS2557->mnErrCode |= ERROR_CLK_HALT;
436 dev_err(pTAS2557->dev, "DEVA clk halted!\n");
437 } else
438 pTAS2557->mnErrCode &= ~ERROR_CLK_HALT;
440 if (nDevInt1Status & 0x10) {
441 pTAS2557->mnErrCode |= ERROR_DIE_OVERTEMP;
442 dev_err(pTAS2557->dev, "DEVA die over temperature!\n");
443 } else
444 pTAS2557->mnErrCode &= ~ERROR_DIE_OVERTEMP;
446 if (nDevInt1Status & 0x08) {
447 pTAS2557->mnErrCode |= ERROR_BROWNOUT;
448 dev_err(pTAS2557->dev, "DEVA brownout!\n");
449 } else
450 pTAS2557->mnErrCode &= ~ERROR_BROWNOUT;
452 if (nDevInt1Status & 0x04) {
453 pTAS2557->mnErrCode |= ERROR_CLK_LOST;
454 dev_err(pTAS2557->dev, "DEVA clock lost!\n");
455 } else
456 pTAS2557->mnErrCode &= ~ERROR_CLK_LOST;
458 if (nDevInt2Status & 0x08) {
459 pTAS2557->mnErrCode |= ERROR_CLK_DET1;
460 dev_err(pTAS2557->dev, "DEVA clk detection 1!\n");
461 } else
462 pTAS2557->mnErrCode &= ~ERROR_CLK_DET1;
464 if (nDevInt2Status & 0x04) {
465 pTAS2557->mnErrCode |= ERROR_CLK_DET2;
466 dev_err(pTAS2557->dev, "DEVA clk detection 2!\n");
467 } else
468 pTAS2557->mnErrCode &= ~ERROR_CLK_DET2;
470 goto program;
471 } else {
472 dev_dbg(pTAS2557->dev, "IRQ Status: 0x%x, 0x%x\n", nDevInt1Status, nDevInt2Status);
473 nCounter = 2;
474 while (nCounter > 0) {
475 nResult = tas2557_dev_read(pTAS2557, TAS2557_POWER_UP_FLAG_REG, &nDevPowerUpFlag);
476 if (nResult < 0)
477 goto program;
478 if ((nDevPowerUpFlag & 0xc0) == 0xc0)
479 break;
480 nCounter--;
481 if (nCounter > 0) {
482 /* in case check pow status just after power on TAS2557 */
483 dev_dbg(pTAS2557->dev, "PowSts: 0x%x, check again after 10ms\n",
484 nDevPowerUpFlag);
485 msleep(10);
486 }
487 }
488 if ((nDevPowerUpFlag & 0xc0) != 0xc0) {
489 dev_err(pTAS2557->dev, "%s, Critical ERROR B[%d]_P[%d]_R[%d]= 0x%x\n",
490 __func__,
491 TAS2557_BOOK_ID(TAS2557_POWER_UP_FLAG_REG),
492 TAS2557_PAGE_ID(TAS2557_POWER_UP_FLAG_REG),
493 TAS2557_PAGE_REG(TAS2557_POWER_UP_FLAG_REG),
494 nDevPowerUpFlag);
495 pTAS2557->mnErrCode |= ERROR_CLASSD_PWR;
496 goto program;
497 }
498 pTAS2557->mnErrCode &= ~ERROR_CLASSD_PWR;
500 dev_dbg(pTAS2557->dev, "%s: INT1=0x%x, INT2=0x%x; PowerUpFlag=0x%x\n",
501 __func__, nDevInt1Status, nDevInt2Status, nDevPowerUpFlag);
502 goto end;
503 }
505 program:
506 /* hardware reset and reload */
507 nResult = -1;
508 tas2557_set_program(pTAS2557, pTAS2557->mnCurrentProgram, pTAS2557->mnCurrentConfiguration);
510 end:
511 if (nResult >= 0) {
512 tas2557_dev_write(pTAS2557, TAS2557_GPIO4_PIN_REG, 0x07);
513 tas2557_enableIRQ(pTAS2557, true, false);
514 }
515 #ifdef CONFIG_TAS2557_MISC
516 mutex_unlock(&pTAS2557->file_lock);
517 #endif
519 #ifdef CONFIG_TAS2557_CODEC
520 mutex_unlock(&pTAS2557->codec_lock);
521 #endif
522 }
524 static irqreturn_t tas2557_irq_handler(int irq, void *dev_id)
525 {
526 struct tas2557_priv *pTAS2557 = (struct tas2557_priv *)dev_id;
528 tas2557_enableIRQ(pTAS2557, false, false);
529 /* get IRQ status after 100 ms */
530 schedule_delayed_work(&pTAS2557->irq_work, msecs_to_jiffies(100));
531 return IRQ_HANDLED;
532 }
534 static enum hrtimer_restart temperature_timer_func(struct hrtimer *timer)
535 {
536 struct tas2557_priv *pTAS2557 = container_of(timer, struct tas2557_priv, mtimer);
538 if (pTAS2557->mbPowerUp) {
539 schedule_work(&pTAS2557->mtimerwork);
540 if (gpio_is_valid(pTAS2557->mnGpioINT)) {
541 tas2557_enableIRQ(pTAS2557, false, false);
542 schedule_delayed_work(&pTAS2557->irq_work, msecs_to_jiffies(1));
543 }
544 }
545 return HRTIMER_NORESTART;
546 }
548 static void timer_work_routine(struct work_struct *work)
549 {
550 struct tas2557_priv *pTAS2557 = container_of(work, struct tas2557_priv, mtimerwork);
551 int nResult, nTemp, nActTemp;
552 struct TProgram *pProgram;
553 static int nAvg;
555 #ifdef CONFIG_TAS2557_CODEC
556 mutex_lock(&pTAS2557->codec_lock);
557 #endif
559 #ifdef CONFIG_TAS2557_MISC
560 mutex_lock(&pTAS2557->file_lock);
561 #endif
563 if (pTAS2557->mbRuntimeSuspend) {
564 dev_info(pTAS2557->dev, "%s, Runtime Suspended\n", __func__);
565 goto end;
566 }
568 if (!pTAS2557->mpFirmware->mnConfigurations) {
569 dev_info(pTAS2557->dev, "%s, firmware not loaded\n", __func__);
570 goto end;
571 }
573 pProgram = &(pTAS2557->mpFirmware->mpPrograms[pTAS2557->mnCurrentProgram]);
574 if (!pTAS2557->mbPowerUp
575 || (pProgram->mnAppMode != TAS2557_APP_TUNINGMODE)) {
576 dev_info(pTAS2557->dev, "%s, pass, Pow=%d, program=%s\n",
577 __func__, pTAS2557->mbPowerUp, pProgram->mpName);
578 goto end;
579 }
581 nResult = tas2557_get_die_temperature(pTAS2557, &nTemp);
582 if (nResult >= 0) {
583 nActTemp = (int)(nTemp >> 23);
584 dev_dbg(pTAS2557->dev, "Die=0x%x, degree=%d\n", nTemp, nActTemp);
585 if (!pTAS2557->mnDieTvReadCounter)
586 nAvg = 0;
587 pTAS2557->mnDieTvReadCounter++;
588 nAvg += nActTemp;
589 if (!(pTAS2557->mnDieTvReadCounter % LOW_TEMPERATURE_COUNTER)) {
590 nAvg /= LOW_TEMPERATURE_COUNTER;
591 dev_dbg(pTAS2557->dev, "check : avg=%d\n", nAvg);
592 if (nAvg < -6) {
593 /* if Die temperature is below -6 degree C */
594 if (pTAS2557->mnDevCurrentGain != LOW_TEMPERATURE_GAIN) {
595 nResult = tas2557_set_DAC_gain(pTAS2557, LOW_TEMPERATURE_GAIN);
596 if (nResult < 0)
597 goto end;
598 pTAS2557->mnDevCurrentGain = LOW_TEMPERATURE_GAIN;
599 dev_dbg(pTAS2557->dev, "LOW Temp: set gain to %d\n", LOW_TEMPERATURE_GAIN);
600 }
601 } else if (nAvg > 5) {
602 /* if Die temperature is above 5 degree C */
603 if (pTAS2557->mnDevCurrentGain != pTAS2557->mnDevGain) {
604 nResult = tas2557_set_DAC_gain(pTAS2557, pTAS2557->mnDevGain);
605 if (nResult < 0)
606 goto end;
607 pTAS2557->mnDevCurrentGain = pTAS2557->mnDevGain;
608 dev_dbg(pTAS2557->dev, "LOW Temp: set gain to original\n");
609 }
610 }
611 nAvg = 0;
612 }
614 if (pTAS2557->mbPowerUp)
615 hrtimer_start(&pTAS2557->mtimer,
616 ns_to_ktime((u64)LOW_TEMPERATURE_CHECK_PERIOD * NSEC_PER_MSEC), HRTIMER_MODE_REL);
617 }
619 end:
621 #ifdef CONFIG_TAS2557_MISC
622 mutex_unlock(&pTAS2557->file_lock);
623 #endif
625 #ifdef CONFIG_TAS2557_CODEC
626 mutex_unlock(&pTAS2557->codec_lock);
627 #endif
628 }
630 static int tas2557_runtime_suspend(struct tas2557_priv *pTAS2557)
631 {
632 dev_dbg(pTAS2557->dev, "%s\n", __func__);
634 pTAS2557->mbRuntimeSuspend = true;
636 if (hrtimer_active(&pTAS2557->mtimer)) {
637 dev_dbg(pTAS2557->dev, "cancel die temp timer\n");
638 hrtimer_cancel(&pTAS2557->mtimer);
639 }
640 if (work_pending(&pTAS2557->mtimerwork)) {
641 dev_dbg(pTAS2557->dev, "cancel timer work\n");
642 cancel_work_sync(&pTAS2557->mtimerwork);
643 }
644 if (gpio_is_valid(pTAS2557->mnGpioINT)) {
645 if (delayed_work_pending(&pTAS2557->irq_work)) {
646 dev_dbg(pTAS2557->dev, "cancel IRQ work\n");
647 cancel_delayed_work_sync(&pTAS2557->irq_work);
648 }
649 }
651 return 0;
652 }
654 static int tas2557_runtime_resume(struct tas2557_priv *pTAS2557)
655 {
656 struct TProgram *pProgram;
658 dev_dbg(pTAS2557->dev, "%s\n", __func__);
659 if (!pTAS2557->mpFirmware->mpPrograms) {
660 dev_dbg(pTAS2557->dev, "%s, firmware not loaded\n", __func__);
661 goto end;
662 }
664 if (pTAS2557->mnCurrentProgram >= pTAS2557->mpFirmware->mnPrograms) {
665 dev_err(pTAS2557->dev, "%s, firmware corrupted\n", __func__);
666 goto end;
667 }
669 pProgram = &(pTAS2557->mpFirmware->mpPrograms[pTAS2557->mnCurrentProgram]);
670 if (pTAS2557->mbPowerUp && (pProgram->mnAppMode == TAS2557_APP_TUNINGMODE)) {
671 if (!hrtimer_active(&pTAS2557->mtimer)) {
672 dev_dbg(pTAS2557->dev, "%s, start Die Temp check timer\n", __func__);
673 pTAS2557->mnDieTvReadCounter = 0;
674 hrtimer_start(&pTAS2557->mtimer,
675 ns_to_ktime((u64)LOW_TEMPERATURE_CHECK_PERIOD * NSEC_PER_MSEC), HRTIMER_MODE_REL);
676 }
677 }
679 pTAS2557->mbRuntimeSuspend = false;
680 end:
682 return 0;
683 }
685 static bool tas2557_volatile(struct device *pDev, unsigned int nRegister)
686 {
687 return true;
688 }
690 static bool tas2557_writeable(struct device *pDev, unsigned int nRegister)
691 {
692 return true;
693 }
695 static const struct regmap_config tas2557_i2c_regmap = {
696 .reg_bits = 8,
697 .val_bits = 8,
698 .writeable_reg = tas2557_writeable,
699 .volatile_reg = tas2557_volatile,
700 .cache_type = REGCACHE_NONE,
701 .max_register = 128,
702 };
704 /* tas2557_i2c_probe :
705 * platform dependent
706 * should implement hardware reset functionality
707 */
708 static int tas2557_i2c_probe(struct i2c_client *pClient,
709 const struct i2c_device_id *pID)
710 {
711 struct tas2557_priv *pTAS2557;
712 int nResult = 0;
713 unsigned int nValue = 0;
714 const char *pFWName;
716 dev_info(&pClient->dev, "%s enter\n", __func__);
718 pTAS2557 = devm_kzalloc(&pClient->dev, sizeof(struct tas2557_priv), GFP_KERNEL);
719 if (!pTAS2557) {
720 nResult = -ENOMEM;
721 goto err;
722 }
724 pTAS2557->dev = &pClient->dev;
725 i2c_set_clientdata(pClient, pTAS2557);
726 dev_set_drvdata(&pClient->dev, pTAS2557);
728 pTAS2557->mpRegmap = devm_regmap_init_i2c(pClient, &tas2557_i2c_regmap);
729 if (IS_ERR(pTAS2557->mpRegmap)) {
730 nResult = PTR_ERR(pTAS2557->mpRegmap);
731 dev_err(&pClient->dev, "Failed to allocate register map: %d\n",
732 nResult);
733 goto err;
734 }
736 if (pClient->dev.of_node)
737 tas2557_parse_dt(&pClient->dev, pTAS2557);
739 if (gpio_is_valid(pTAS2557->mnResetGPIO)) {
740 nResult = gpio_request(pTAS2557->mnResetGPIO, "TAS2557-RESET");
741 if (nResult < 0) {
742 dev_err(pTAS2557->dev, "%s: GPIO %d request error\n",
743 __func__, pTAS2557->mnResetGPIO);
744 goto err;
745 }
746 tas2557_hw_reset(pTAS2557);
747 }
749 pTAS2557->read = tas2557_dev_read;
750 pTAS2557->write = tas2557_dev_write;
751 pTAS2557->bulk_read = tas2557_dev_bulk_read;
752 pTAS2557->bulk_write = tas2557_dev_bulk_write;
753 pTAS2557->update_bits = tas2557_dev_update_bits;
754 pTAS2557->enableIRQ = tas2557_enableIRQ;
755 pTAS2557->clearIRQ = tas2557_clearIRQ;
756 pTAS2557->set_config = tas2557_set_config;
757 pTAS2557->set_calibration = tas2557_set_calibration;
758 pTAS2557->hw_reset = tas2557_hw_reset;
759 pTAS2557->runtime_suspend = tas2557_runtime_suspend;
760 pTAS2557->runtime_resume = tas2557_runtime_resume;
761 pTAS2557->mnRestart = 0;
762 pTAS2557->mnEdge = 4;
764 mutex_init(&pTAS2557->dev_lock);
766 /* Reset the chip */
767 nResult = tas2557_dev_write(pTAS2557, TAS2557_SW_RESET_REG, 0x01);
768 if (nResult < 0) {
769 dev_err(&pClient->dev, "I2c fail, %d\n", nResult);
770 goto err;
771 }
773 msleep(1);
774 tas2557_dev_read(pTAS2557, TAS2557_REV_PGID_REG, &nValue);
775 pTAS2557->mnPGID = nValue;
776 if (pTAS2557->mnPGID == TAS2557_PG_VERSION_2P1) {
777 dev_info(pTAS2557->dev, "PG2.1 Silicon found\n");
778 pFWName = TAS2557_FW_NAME;
779 } else if (pTAS2557->mnPGID == TAS2557_PG_VERSION_1P0) {
780 dev_info(pTAS2557->dev, "PG1.0 Silicon found\n");
781 pFWName = TAS2557_PG1P0_FW_NAME;
782 } else {
783 nResult = -ENOTSUPP;
784 dev_info(pTAS2557->dev, "unsupport Silicon 0x%x\n", pTAS2557->mnPGID);
785 goto err;
786 }
788 if (gpio_is_valid(pTAS2557->mnGpioINT)) {
789 nResult = gpio_request(pTAS2557->mnGpioINT, "TAS2557-IRQ");
790 if (nResult < 0) {
791 dev_err(pTAS2557->dev,
792 "%s: GPIO %d request INT error\n",
793 __func__, pTAS2557->mnGpioINT);
794 goto err;
795 }
797 gpio_direction_input(pTAS2557->mnGpioINT);
798 pTAS2557->mnIRQ = gpio_to_irq(pTAS2557->mnGpioINT);
799 dev_dbg(pTAS2557->dev, "irq = %d\n", pTAS2557->mnIRQ);
800 INIT_DELAYED_WORK(&pTAS2557->irq_work, irq_work_routine);
801 nResult = request_threaded_irq(pTAS2557->mnIRQ, tas2557_irq_handler,
802 NULL, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
803 pClient->name, pTAS2557);
804 if (nResult < 0) {
805 dev_err(pTAS2557->dev,
806 "request_irq failed, %d\n", nResult);
807 goto err;
808 }
809 disable_irq_nosync(pTAS2557->mnIRQ);
810 }
812 pTAS2557->mpFirmware = devm_kzalloc(&pClient->dev, sizeof(struct TFirmware), GFP_KERNEL);
813 if (!pTAS2557->mpFirmware) {
814 nResult = -ENOMEM;
815 goto err;
816 }
818 pTAS2557->mpCalFirmware = devm_kzalloc(&pClient->dev, sizeof(struct TFirmware), GFP_KERNEL);
819 if (!pTAS2557->mpCalFirmware) {
820 nResult = -ENOMEM;
821 goto err;
822 }
824 #ifdef CONFIG_TAS2557_CODEC
825 mutex_init(&pTAS2557->codec_lock);
826 tas2557_register_codec(pTAS2557);
827 #endif
829 #ifdef CONFIG_TAS2557_MISC
830 mutex_init(&pTAS2557->file_lock);
831 tas2557_register_misc(pTAS2557);
832 #endif
834 #ifdef ENABLE_TILOAD
835 tiload_driver_init(pTAS2557);
836 #endif
838 hrtimer_init(&pTAS2557->mtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
839 pTAS2557->mtimer.function = temperature_timer_func;
840 INIT_WORK(&pTAS2557->mtimerwork, timer_work_routine);
842 nResult = request_firmware_nowait(THIS_MODULE, 1, pFWName,
843 pTAS2557->dev, GFP_KERNEL, pTAS2557, tas2557_fw_ready);
845 err:
847 return nResult;
848 }
850 static int tas2557_i2c_remove(struct i2c_client *pClient)
851 {
852 struct tas2557_priv *pTAS2557 = i2c_get_clientdata(pClient);
854 dev_info(pTAS2557->dev, "%s\n", __func__);
856 #ifdef CONFIG_TAS2557_CODEC
857 tas2557_deregister_codec(pTAS2557);
858 mutex_destroy(&pTAS2557->codec_lock);
859 #endif
861 #ifdef CONFIG_TAS2557_MISC
862 tas2557_deregister_misc(pTAS2557);
863 mutex_destroy(&pTAS2557->file_lock);
864 #endif
866 mutex_destroy(&pTAS2557->dev_lock);
867 return 0;
868 }
870 static const struct i2c_device_id tas2557_i2c_id[] = {
871 {"tas2557", 0},
872 {}
873 };
875 MODULE_DEVICE_TABLE(i2c, tas2557_i2c_id);
877 #if defined(CONFIG_OF)
878 static const struct of_device_id tas2557_of_match[] = {
879 {.compatible = "ti,tas2557"},
880 {},
881 };
883 MODULE_DEVICE_TABLE(of, tas2557_of_match);
884 #endif
886 static struct i2c_driver tas2557_i2c_driver = {
887 .driver = {
888 .name = "tas2557",
889 .owner = THIS_MODULE,
890 #if defined(CONFIG_OF)
891 .of_match_table = of_match_ptr(tas2557_of_match),
892 #endif
893 },
894 .probe = tas2557_i2c_probe,
895 .remove = tas2557_i2c_remove,
896 .id_table = tas2557_i2c_id,
897 };
899 module_i2c_driver(tas2557_i2c_driver);
901 MODULE_AUTHOR("Texas Instruments Inc.");
902 MODULE_DESCRIPTION("TAS2557 I2C Smart Amplifier driver");
903 MODULE_LICENSE("GPL v2");
905 #endif