1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM
4 * and audio CODEC devices
5 *
6 * Copyright (C) 2005-2006 Texas Instruments, Inc.
7 *
8 * Modifications to defer interrupt handling to a kernel thread:
9 * Copyright (C) 2006 MontaVista Software, Inc.
10 *
11 * Based on tlv320aic23.c:
12 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com>
13 *
14 * Code cleanup and modifications to IRQ handler.
15 * by syed khasim <x0khasim@ti.com>
16 */
17
18#include <linux/init.h>
19#include <linux/mutex.h>
20#include <linux/platform_device.h>
21#include <linux/regmap.h>
22#include <linux/clk.h>
23#include <linux/err.h>
24#include <linux/device.h>
25#include <linux/of.h>
26#include <linux/of_irq.h>
27#include <linux/of_platform.h>
28#include <linux/irq.h>
29#include <linux/irqdomain.h>
30
31#include <linux/regulator/machine.h>
32
33#include <linux/i2c.h>
34
35#include <linux/mfd/core.h>
36#include <linux/mfd/twl.h>
37
38/* Register descriptions for audio */
39#include <linux/mfd/twl4030-audio.h>
40
41#include "twl-core.h"
42
43/*
44 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
45 * Management and System Companion Device" chips originally designed for
46 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C,
47 * often at around 3 Mbit/sec, including for interrupt handling.
48 *
49 * This driver core provides genirq support for the interrupts emitted,
50 * by the various modules, and exports register access primitives.
51 *
52 * FIXME this driver currently requires use of the first interrupt line
53 * (and associated registers).
54 */
55
56#define DRIVER_NAME "twl"
57
58/* Triton Core internal information (BEGIN) */
59
60/* Base Address defns for twl4030_map[] */
61
62/* subchip/slave 0 - USB ID */
63#define TWL4030_BASEADD_USB 0x0000
64
65/* subchip/slave 1 - AUD ID */
66#define TWL4030_BASEADD_AUDIO_VOICE 0x0000
67#define TWL4030_BASEADD_GPIO 0x0098
68#define TWL4030_BASEADD_INTBR 0x0085
69#define TWL4030_BASEADD_PIH 0x0080
70#define TWL4030_BASEADD_TEST 0x004C
71
72/* subchip/slave 2 - AUX ID */
73#define TWL4030_BASEADD_INTERRUPTS 0x00B9
74#define TWL4030_BASEADD_LED 0x00EE
75#define TWL4030_BASEADD_MADC 0x0000
76#define TWL4030_BASEADD_MAIN_CHARGE 0x0074
77#define TWL4030_BASEADD_PRECHARGE 0x00AA
78#define TWL4030_BASEADD_PWM 0x00F8
79#define TWL4030_BASEADD_KEYPAD 0x00D2
80
81#define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */
82#define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's
83 one */
84
85/* subchip/slave 3 - POWER ID */
86#define TWL4030_BASEADD_BACKUP 0x0014
87#define TWL4030_BASEADD_INT 0x002E
88#define TWL4030_BASEADD_PM_MASTER 0x0036
89
90#define TWL4030_BASEADD_PM_RECEIVER 0x005B
91#define TWL4030_DCDC_GLOBAL_CFG 0x06
92#define SMARTREFLEX_ENABLE BIT(3)
93
94#define TWL4030_BASEADD_RTC 0x001C
95#define TWL4030_BASEADD_SECURED_REG 0x0000
96
97/* Triton Core internal information (END) */
98
99
100/* subchip/slave 0 0x48 - POWER */
101#define TWL6030_BASEADD_RTC 0x0000
102#define TWL6030_BASEADD_SECURED_REG 0x0017
103#define TWL6030_BASEADD_PM_MASTER 0x001F
104#define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */
105#define TWL6030_BASEADD_PM_MISC 0x00E2
106#define TWL6030_BASEADD_PM_PUPD 0x00F0
107
108/* subchip/slave 1 0x49 - FEATURE */
109#define TWL6030_BASEADD_USB 0x0000
110#define TWL6030_BASEADD_GPADC_CTRL 0x002E
111#define TWL6030_BASEADD_AUX 0x0090
112#define TWL6030_BASEADD_PWM 0x00BA
113#define TWL6030_BASEADD_GASGAUGE 0x00C0
114#define TWL6030_BASEADD_PIH 0x00D0
115#define TWL6032_BASEADD_CHARGER 0x00DA
116#define TWL6030_BASEADD_CHARGER 0x00E0
117#define TWL6030_BASEADD_LED 0x00F4
118
119/* subchip/slave 2 0x4A - DFT */
120#define TWL6030_BASEADD_DIEID 0x00C0
121
122/* subchip/slave 3 0x4B - AUDIO */
123#define TWL6030_BASEADD_AUDIO 0x0000
124#define TWL6030_BASEADD_RSV 0x0000
125#define TWL6030_BASEADD_ZERO 0x0000
126
127/* Some fields in TWL6030_PHOENIX_DEV_ON */
128#define TWL6030_APP_DEVOFF BIT(0)
129#define TWL6030_CON_DEVOFF BIT(1)
130#define TWL6030_MOD_DEVOFF BIT(2)
131
132/* Few power values */
133#define R_CFG_BOOT 0x05
134
135/* some fields in R_CFG_BOOT */
136#define HFCLK_FREQ_19p2_MHZ (1 << 0)
137#define HFCLK_FREQ_26_MHZ (2 << 0)
138#define HFCLK_FREQ_38p4_MHZ (3 << 0)
139#define HIGH_PERF_SQ (1 << 3)
140#define CK32K_LOWPWR_EN (1 << 7)
141
142/*----------------------------------------------------------------------*/
143
144/* Structure for each TWL4030/TWL6030 Slave */
145struct twl_client {
146 struct i2c_client *client;
147 struct regmap *regmap;
148};
149
150/* mapping the module id to slave id and base address */
151struct twl_mapping {
152 unsigned char sid; /* Slave ID */
153 unsigned char base; /* base address */
154};
155
156struct twl_private {
157 bool ready; /* The core driver is ready to be used */
158 u32 twl_idcode; /* TWL IDCODE Register value */
159 unsigned int twl_id;
160
161 struct twl_mapping *twl_map;
162 struct twl_client *twl_modules;
163};
164
165static struct twl_private *twl_priv;
166
167static struct twl_mapping twl4030_map[] = {
168 /*
169 * NOTE: don't change this table without updating the
170 * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
171 * so they continue to match the order in this table.
172 */
173
174 /* Common IPs */
175 { 0, TWL4030_BASEADD_USB },
176 { 1, TWL4030_BASEADD_PIH },
177 { 2, TWL4030_BASEADD_MAIN_CHARGE },
178 { 3, TWL4030_BASEADD_PM_MASTER },
179 { 3, TWL4030_BASEADD_PM_RECEIVER },
180
181 { 3, TWL4030_BASEADD_RTC },
182 { 2, TWL4030_BASEADD_PWM },
183 { 2, TWL4030_BASEADD_LED },
184 { 3, TWL4030_BASEADD_SECURED_REG },
185
186 /* TWL4030 specific IPs */
187 { 1, TWL4030_BASEADD_AUDIO_VOICE },
188 { 1, TWL4030_BASEADD_GPIO },
189 { 1, TWL4030_BASEADD_INTBR },
190 { 1, TWL4030_BASEADD_TEST },
191 { 2, TWL4030_BASEADD_KEYPAD },
192
193 { 2, TWL4030_BASEADD_MADC },
194 { 2, TWL4030_BASEADD_INTERRUPTS },
195 { 2, TWL4030_BASEADD_PRECHARGE },
196 { 3, TWL4030_BASEADD_BACKUP },
197 { 3, TWL4030_BASEADD_INT },
198
199 { 2, TWL5031_BASEADD_ACCESSORY },
200 { 2, TWL5031_BASEADD_INTERRUPTS },
201};
202
203static const struct reg_default twl4030_49_defaults[] = {
204 /* Audio Registers */
205 { 0x01, 0x00}, /* CODEC_MODE */
206 { 0x02, 0x00}, /* OPTION */
207 /* 0x03 Unused */
208 { 0x04, 0x00}, /* MICBIAS_CTL */
209 { 0x05, 0x00}, /* ANAMICL */
210 { 0x06, 0x00}, /* ANAMICR */
211 { 0x07, 0x00}, /* AVADC_CTL */
212 { 0x08, 0x00}, /* ADCMICSEL */
213 { 0x09, 0x00}, /* DIGMIXING */
214 { 0x0a, 0x0f}, /* ATXL1PGA */
215 { 0x0b, 0x0f}, /* ATXR1PGA */
216 { 0x0c, 0x0f}, /* AVTXL2PGA */
217 { 0x0d, 0x0f}, /* AVTXR2PGA */
218 { 0x0e, 0x00}, /* AUDIO_IF */
219 { 0x0f, 0x00}, /* VOICE_IF */
220 { 0x10, 0x3f}, /* ARXR1PGA */
221 { 0x11, 0x3f}, /* ARXL1PGA */
222 { 0x12, 0x3f}, /* ARXR2PGA */
223 { 0x13, 0x3f}, /* ARXL2PGA */
224 { 0x14, 0x25}, /* VRXPGA */
225 { 0x15, 0x00}, /* VSTPGA */
226 { 0x16, 0x00}, /* VRX2ARXPGA */
227 { 0x17, 0x00}, /* AVDAC_CTL */
228 { 0x18, 0x00}, /* ARX2VTXPGA */
229 { 0x19, 0x32}, /* ARXL1_APGA_CTL*/
230 { 0x1a, 0x32}, /* ARXR1_APGA_CTL*/
231 { 0x1b, 0x32}, /* ARXL2_APGA_CTL*/
232 { 0x1c, 0x32}, /* ARXR2_APGA_CTL*/
233 { 0x1d, 0x00}, /* ATX2ARXPGA */
234 { 0x1e, 0x00}, /* BT_IF */
235 { 0x1f, 0x55}, /* BTPGA */
236 { 0x20, 0x00}, /* BTSTPGA */
237 { 0x21, 0x00}, /* EAR_CTL */
238 { 0x22, 0x00}, /* HS_SEL */
239 { 0x23, 0x00}, /* HS_GAIN_SET */
240 { 0x24, 0x00}, /* HS_POPN_SET */
241 { 0x25, 0x00}, /* PREDL_CTL */
242 { 0x26, 0x00}, /* PREDR_CTL */
243 { 0x27, 0x00}, /* PRECKL_CTL */
244 { 0x28, 0x00}, /* PRECKR_CTL */
245 { 0x29, 0x00}, /* HFL_CTL */
246 { 0x2a, 0x00}, /* HFR_CTL */
247 { 0x2b, 0x05}, /* ALC_CTL */
248 { 0x2c, 0x00}, /* ALC_SET1 */
249 { 0x2d, 0x00}, /* ALC_SET2 */
250 { 0x2e, 0x00}, /* BOOST_CTL */
251 { 0x2f, 0x00}, /* SOFTVOL_CTL */
252 { 0x30, 0x13}, /* DTMF_FREQSEL */
253 { 0x31, 0x00}, /* DTMF_TONEXT1H */
254 { 0x32, 0x00}, /* DTMF_TONEXT1L */
255 { 0x33, 0x00}, /* DTMF_TONEXT2H */
256 { 0x34, 0x00}, /* DTMF_TONEXT2L */
257 { 0x35, 0x79}, /* DTMF_TONOFF */
258 { 0x36, 0x11}, /* DTMF_WANONOFF */
259 { 0x37, 0x00}, /* I2S_RX_SCRAMBLE_H */
260 { 0x38, 0x00}, /* I2S_RX_SCRAMBLE_M */
261 { 0x39, 0x00}, /* I2S_RX_SCRAMBLE_L */
262 { 0x3a, 0x06}, /* APLL_CTL */
263 { 0x3b, 0x00}, /* DTMF_CTL */
264 { 0x3c, 0x44}, /* DTMF_PGA_CTL2 (0x3C) */
265 { 0x3d, 0x69}, /* DTMF_PGA_CTL1 (0x3D) */
266 { 0x3e, 0x00}, /* MISC_SET_1 */
267 { 0x3f, 0x00}, /* PCMBTMUX */
268 /* 0x40 - 0x42 Unused */
269 { 0x43, 0x00}, /* RX_PATH_SEL */
270 { 0x44, 0x32}, /* VDL_APGA_CTL */
271 { 0x45, 0x00}, /* VIBRA_CTL */
272 { 0x46, 0x00}, /* VIBRA_SET */
273 { 0x47, 0x00}, /* VIBRA_PWM_SET */
274 { 0x48, 0x00}, /* ANAMIC_GAIN */
275 { 0x49, 0x00}, /* MISC_SET_2 */
276 /* End of Audio Registers */
277};
278
279static bool twl4030_49_nop_reg(struct device *dev, unsigned int reg)
280{
281 switch (reg) {
282 case 0x00:
283 case 0x03:
284 case 0x40:
285 case 0x41:
286 case 0x42:
287 return false;
288 default:
289 return true;
290 }
291}
292
293static const struct regmap_range twl4030_49_volatile_ranges[] = {
294 regmap_reg_range(TWL4030_BASEADD_TEST, 0xff),
295};
296
297static const struct regmap_access_table twl4030_49_volatile_table = {
298 .yes_ranges = twl4030_49_volatile_ranges,
299 .n_yes_ranges = ARRAY_SIZE(twl4030_49_volatile_ranges),
300};
301
302static const struct regmap_config twl4030_regmap_config[4] = {
303 {
304 /* Address 0x48 */
305 .reg_bits = 8,
306 .val_bits = 8,
307 .max_register = 0xff,
308 },
309 {
310 /* Address 0x49 */
311 .reg_bits = 8,
312 .val_bits = 8,
313 .max_register = 0xff,
314
315 .readable_reg = twl4030_49_nop_reg,
316 .writeable_reg = twl4030_49_nop_reg,
317
318 .volatile_table = &twl4030_49_volatile_table,
319
320 .reg_defaults = twl4030_49_defaults,
321 .num_reg_defaults = ARRAY_SIZE(twl4030_49_defaults),
322 .cache_type = REGCACHE_MAPLE,
323 },
324 {
325 /* Address 0x4a */
326 .reg_bits = 8,
327 .val_bits = 8,
328 .max_register = 0xff,
329 },
330 {
331 /* Address 0x4b */
332 .reg_bits = 8,
333 .val_bits = 8,
334 .max_register = 0xff,
335 },
336};
337
338static struct twl_mapping twl6030_map[] = {
339 /*
340 * NOTE: don't change this table without updating the
341 * <linux/mfd/twl.h> defines for TWL4030_MODULE_*
342 * so they continue to match the order in this table.
343 */
344
345 /* Common IPs */
346 { 1, TWL6030_BASEADD_USB },
347 { 1, TWL6030_BASEADD_PIH },
348 { 1, TWL6030_BASEADD_CHARGER },
349 { 0, TWL6030_BASEADD_PM_MASTER },
350 { 0, TWL6030_BASEADD_PM_SLAVE_MISC },
351
352 { 0, TWL6030_BASEADD_RTC },
353 { 1, TWL6030_BASEADD_PWM },
354 { 1, TWL6030_BASEADD_LED },
355 { 0, TWL6030_BASEADD_SECURED_REG },
356
357 /* TWL6030 specific IPs */
358 { 0, TWL6030_BASEADD_ZERO },
359 { 1, TWL6030_BASEADD_ZERO },
360 { 2, TWL6030_BASEADD_ZERO },
361 { 1, TWL6030_BASEADD_GPADC_CTRL },
362 { 1, TWL6030_BASEADD_GASGAUGE },
363
364 /* TWL6032 specific charger registers */
365 { 1, TWL6032_BASEADD_CHARGER },
366};
367
368static const struct regmap_config twl6030_regmap_config[3] = {
369 {
370 /* Address 0x48 */
371 .reg_bits = 8,
372 .val_bits = 8,
373 .max_register = 0xff,
374 },
375 {
376 /* Address 0x49 */
377 .reg_bits = 8,
378 .val_bits = 8,
379 .max_register = 0xff,
380 },
381 {
382 /* Address 0x4a */
383 .reg_bits = 8,
384 .val_bits = 8,
385 .max_register = 0xff,
386 },
387};
388
389/*----------------------------------------------------------------------*/
390
391static inline int twl_get_num_slaves(void)
392{
393 if (twl_class_is_4030())
394 return 4; /* TWL4030 class have four slave address */
395 else
396 return 3; /* TWL6030 class have three slave address */
397}
398
399static inline int twl_get_last_module(void)
400{
401 if (twl_class_is_4030())
402 return TWL4030_MODULE_LAST;
403 else
404 return TWL6030_MODULE_LAST;
405}
406
407/* Exported Functions */
408
409unsigned int twl_rev(void)
410{
411 return twl_priv ? twl_priv->twl_id : 0;
412}
413EXPORT_SYMBOL(twl_rev);
414
415/**
416 * twl_get_regmap - Get the regmap associated with the given module
417 * @mod_no: module number
418 *
419 * Returns the regmap pointer or NULL in case of failure.
420 */
421static struct regmap *twl_get_regmap(u8 mod_no)
422{
423 int sid;
424 struct twl_client *twl;
425
426 if (unlikely(!twl_priv || !twl_priv->ready)) {
427 pr_err("%s: not initialized\n", DRIVER_NAME);
428 return NULL;
429 }
430 if (unlikely(mod_no >= twl_get_last_module())) {
431 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
432 return NULL;
433 }
434
435 sid = twl_priv->twl_map[mod_no].sid;
436 twl = &twl_priv->twl_modules[sid];
437
438 return twl->regmap;
439}
440
441/**
442 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
443 * @mod_no: module number
444 * @value: an array of num_bytes+1 containing data to write
445 * @reg: register address (just offset will do)
446 * @num_bytes: number of bytes to transfer
447 *
448 * Returns 0 on success or else a negative error code.
449 */
450int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
451{
452 struct regmap *regmap = twl_get_regmap(mod_no);
453 int ret;
454
455 if (!regmap)
456 return -EPERM;
457
458 ret = regmap_bulk_write(map: regmap, reg: twl_priv->twl_map[mod_no].base + reg,
459 val: value, val_count: num_bytes);
460
461 if (ret)
462 pr_err("%s: Write failed (mod %d, reg 0x%02x count %d)\n",
463 DRIVER_NAME, mod_no, reg, num_bytes);
464
465 return ret;
466}
467EXPORT_SYMBOL(twl_i2c_write);
468
469/**
470 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
471 * @mod_no: module number
472 * @value: an array of num_bytes containing data to be read
473 * @reg: register address (just offset will do)
474 * @num_bytes: number of bytes to transfer
475 *
476 * Returns 0 on success or else a negative error code.
477 */
478int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
479{
480 struct regmap *regmap = twl_get_regmap(mod_no);
481 int ret;
482
483 if (!regmap)
484 return -EPERM;
485
486 ret = regmap_bulk_read(map: regmap, reg: twl_priv->twl_map[mod_no].base + reg,
487 val: value, val_count: num_bytes);
488
489 if (ret)
490 pr_err("%s: Read failed (mod %d, reg 0x%02x count %d)\n",
491 DRIVER_NAME, mod_no, reg, num_bytes);
492
493 return ret;
494}
495EXPORT_SYMBOL(twl_i2c_read);
496
497/**
498 * twl_set_regcache_bypass - Configure the regcache bypass for the regmap associated
499 * with the module
500 * @mod_no: module number
501 * @enable: Regcache bypass state
502 *
503 * Returns 0 else failure.
504 */
505int twl_set_regcache_bypass(u8 mod_no, bool enable)
506{
507 struct regmap *regmap = twl_get_regmap(mod_no);
508
509 if (!regmap)
510 return -EPERM;
511
512 regcache_cache_bypass(map: regmap, enable);
513
514 return 0;
515}
516EXPORT_SYMBOL(twl_set_regcache_bypass);
517
518/*----------------------------------------------------------------------*/
519
520/**
521 * twl_read_idcode_register - API to read the IDCODE register.
522 *
523 * Unlocks the IDCODE register and read the 32 bit value.
524 */
525static int twl_read_idcode_register(void)
526{
527 int err;
528
529 err = twl_i2c_write_u8(mod_no: TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
530 REG_UNLOCK_TEST_REG);
531 if (err) {
532 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
533 goto fail;
534 }
535
536 err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_priv->twl_idcode),
537 REG_IDCODE_7_0, 4);
538 if (err) {
539 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
540 goto fail;
541 }
542
543 err = twl_i2c_write_u8(mod_no: TWL4030_MODULE_INTBR, val: 0x0, REG_UNLOCK_TEST_REG);
544 if (err)
545 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
546fail:
547 return err;
548}
549
550/**
551 * twl_get_type - API to get TWL Si type.
552 *
553 * Api to get the TWL Si type from IDCODE value.
554 */
555int twl_get_type(void)
556{
557 return TWL_SIL_TYPE(twl_priv->twl_idcode);
558}
559EXPORT_SYMBOL_GPL(twl_get_type);
560
561/**
562 * twl_get_version - API to get TWL Si version.
563 *
564 * Api to get the TWL Si version from IDCODE value.
565 */
566int twl_get_version(void)
567{
568 return TWL_SIL_REV(twl_priv->twl_idcode);
569}
570EXPORT_SYMBOL_GPL(twl_get_version);
571
572/**
573 * twl_get_hfclk_rate - API to get TWL external HFCLK clock rate.
574 *
575 * Api to get the TWL HFCLK rate based on BOOT_CFG register.
576 */
577int twl_get_hfclk_rate(void)
578{
579 u8 ctrl;
580 int rate;
581
582 twl_i2c_read_u8(mod_no: TWL_MODULE_PM_MASTER, val: &ctrl, R_CFG_BOOT);
583
584 switch (ctrl & 0x3) {
585 case HFCLK_FREQ_19p2_MHZ:
586 rate = 19200000;
587 break;
588 case HFCLK_FREQ_26_MHZ:
589 rate = 26000000;
590 break;
591 case HFCLK_FREQ_38p4_MHZ:
592 rate = 38400000;
593 break;
594 default:
595 pr_err("TWL4030: HFCLK is not configured\n");
596 rate = -EINVAL;
597 break;
598 }
599
600 return rate;
601}
602EXPORT_SYMBOL_GPL(twl_get_hfclk_rate);
603
604/*----------------------------------------------------------------------*/
605
606/*
607 * These three functions initialize the on-chip clock framework,
608 * letting it generate the right frequencies for USB, MADC, and
609 * other purposes.
610 */
611static inline int protect_pm_master(void)
612{
613 int e = 0;
614
615 e = twl_i2c_write_u8(mod_no: TWL_MODULE_PM_MASTER, val: 0,
616 TWL4030_PM_MASTER_PROTECT_KEY);
617 return e;
618}
619
620static inline int unprotect_pm_master(void)
621{
622 int e = 0;
623
624 e |= twl_i2c_write_u8(mod_no: TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG1,
625 TWL4030_PM_MASTER_PROTECT_KEY);
626 e |= twl_i2c_write_u8(mod_no: TWL_MODULE_PM_MASTER, TWL4030_PM_MASTER_KEY_CFG2,
627 TWL4030_PM_MASTER_PROTECT_KEY);
628
629 return e;
630}
631
632static void clocks_init(struct device *dev)
633{
634 int e = 0;
635 struct clk *osc;
636 u32 rate;
637 u8 ctrl = HFCLK_FREQ_26_MHZ;
638
639 osc = clk_get(dev, id: "fck");
640 if (IS_ERR(ptr: osc)) {
641 printk(KERN_WARNING "Skipping twl internal clock init and "
642 "using bootloader value (unknown osc rate)\n");
643 return;
644 }
645
646 rate = clk_get_rate(clk: osc);
647 clk_put(clk: osc);
648
649 switch (rate) {
650 case 19200000:
651 ctrl = HFCLK_FREQ_19p2_MHZ;
652 break;
653 case 26000000:
654 ctrl = HFCLK_FREQ_26_MHZ;
655 break;
656 case 38400000:
657 ctrl = HFCLK_FREQ_38p4_MHZ;
658 break;
659 }
660
661 ctrl |= HIGH_PERF_SQ;
662
663 e |= unprotect_pm_master();
664 /* effect->MADC+USB ck en */
665 e |= twl_i2c_write_u8(mod_no: TWL_MODULE_PM_MASTER, val: ctrl, R_CFG_BOOT);
666 e |= protect_pm_master();
667
668 if (e < 0)
669 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
670}
671
672/*----------------------------------------------------------------------*/
673
674
675static void twl_remove(struct i2c_client *client)
676{
677 unsigned i, num_slaves;
678
679 if (twl_class_is_4030())
680 twl4030_exit_irq();
681 else
682 twl6030_exit_irq();
683
684 num_slaves = twl_get_num_slaves();
685 for (i = 0; i < num_slaves; i++) {
686 struct twl_client *twl = &twl_priv->twl_modules[i];
687
688 if (twl->client && twl->client != client)
689 i2c_unregister_device(client: twl->client);
690 twl->client = NULL;
691 }
692 twl_priv->ready = false;
693}
694
695static void twl6030_power_off(void)
696{
697 int err;
698 u8 val;
699
700 err = twl_i2c_read_u8(mod_no: TWL_MODULE_PM_MASTER, val: &val, TWL6030_PHOENIX_DEV_ON);
701 if (err)
702 return;
703
704 val |= TWL6030_APP_DEVOFF | TWL6030_CON_DEVOFF | TWL6030_MOD_DEVOFF;
705 twl_i2c_write_u8(mod_no: TWL_MODULE_PM_MASTER, val, TWL6030_PHOENIX_DEV_ON);
706}
707
708
709static struct of_dev_auxdata twl_auxdata_lookup[] = {
710 OF_DEV_AUXDATA("ti,twl4030-gpio", 0, "twl4030-gpio", NULL),
711 { /* sentinel */ },
712};
713
714static const struct mfd_cell twl6030_cells[] = {
715 { .name = "twl6030-clk" },
716};
717
718static const struct mfd_cell twl6032_cells[] = {
719 { .name = "twl6032-clk" },
720};
721
722/* NOTE: This driver only handles a single twl4030/tps659x0 chip */
723static int
724twl_probe(struct i2c_client *client)
725{
726 const struct i2c_device_id *id = i2c_client_get_device_id(client);
727 struct device_node *node = client->dev.of_node;
728 struct platform_device *pdev;
729 const struct regmap_config *twl_regmap_config;
730 int irq_base = 0;
731 int status;
732 unsigned i, num_slaves;
733
734 if (!node) {
735 dev_err(&client->dev, "no platform data\n");
736 return -EINVAL;
737 }
738
739 if (twl_priv) {
740 dev_dbg(&client->dev, "only one instance of %s allowed\n",
741 DRIVER_NAME);
742 return -EBUSY;
743 }
744
745 pdev = platform_device_alloc(DRIVER_NAME, id: -1);
746 if (!pdev) {
747 dev_err(&client->dev, "can't alloc pdev\n");
748 return -ENOMEM;
749 }
750
751 status = platform_device_add(pdev);
752 if (status) {
753 platform_device_put(pdev);
754 return status;
755 }
756
757 if (i2c_check_functionality(adap: client->adapter, I2C_FUNC_I2C) == 0) {
758 dev_dbg(&client->dev, "can't talk I2C?\n");
759 status = -EIO;
760 goto free;
761 }
762
763 twl_priv = devm_kzalloc(dev: &client->dev, size: sizeof(struct twl_private),
764 GFP_KERNEL);
765 if (!twl_priv) {
766 status = -ENOMEM;
767 goto free;
768 }
769
770 if ((id->driver_data) & TWL6030_CLASS) {
771 twl_priv->twl_id = TWL6030_CLASS_ID;
772 twl_priv->twl_map = &twl6030_map[0];
773 twl_regmap_config = twl6030_regmap_config;
774 } else {
775 twl_priv->twl_id = TWL4030_CLASS_ID;
776 twl_priv->twl_map = &twl4030_map[0];
777 twl_regmap_config = twl4030_regmap_config;
778 }
779
780 num_slaves = twl_get_num_slaves();
781 twl_priv->twl_modules = devm_kcalloc(dev: &client->dev,
782 n: num_slaves,
783 size: sizeof(struct twl_client),
784 GFP_KERNEL);
785 if (!twl_priv->twl_modules) {
786 status = -ENOMEM;
787 goto free;
788 }
789
790 for (i = 0; i < num_slaves; i++) {
791 struct twl_client *twl = &twl_priv->twl_modules[i];
792
793 if (i == 0) {
794 twl->client = client;
795 } else {
796 twl->client = i2c_new_dummy_device(adapter: client->adapter,
797 address: client->addr + i);
798 if (IS_ERR(ptr: twl->client)) {
799 dev_err(&client->dev,
800 "can't attach client %d\n", i);
801 status = PTR_ERR(ptr: twl->client);
802 goto fail;
803 }
804 }
805
806 twl->regmap = devm_regmap_init_i2c(twl->client,
807 &twl_regmap_config[i]);
808 if (IS_ERR(ptr: twl->regmap)) {
809 status = PTR_ERR(ptr: twl->regmap);
810 dev_err(&client->dev,
811 "Failed to allocate regmap %d, err: %d\n", i,
812 status);
813 goto fail;
814 }
815 }
816
817 twl_priv->ready = true;
818
819 /* setup clock framework */
820 clocks_init(dev: &client->dev);
821
822 /* read TWL IDCODE Register */
823 if (twl_class_is_4030()) {
824 status = twl_read_idcode_register();
825 WARN(status < 0, "Error: reading twl_idcode register value\n");
826 }
827
828 /* Maybe init the T2 Interrupt subsystem */
829 if (client->irq) {
830 if (twl_class_is_4030()) {
831 twl4030_init_chip_irq(chip: id->name);
832 irq_base = twl4030_init_irq(dev: &client->dev, irq_num: client->irq);
833 } else {
834 irq_base = twl6030_init_irq(dev: &client->dev, irq_num: client->irq);
835 }
836
837 if (irq_base < 0) {
838 status = irq_base;
839 goto fail;
840 }
841 }
842
843 /*
844 * Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
845 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
846 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
847 *
848 * Also, always enable SmartReflex bit as that's needed for omaps to
849 * do anything over I2C4 for voltage scaling even if SmartReflex
850 * is disabled. Without the SmartReflex bit omap sys_clkreq idle
851 * signal will never trigger for retention idle.
852 */
853 if (twl_class_is_4030()) {
854 u8 temp;
855
856 twl_i2c_read_u8(mod_no: TWL4030_MODULE_INTBR, val: &temp, REG_GPPUPDCTR1);
857 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
858 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
859 twl_i2c_write_u8(mod_no: TWL4030_MODULE_INTBR, val: temp, REG_GPPUPDCTR1);
860
861 twl_i2c_read_u8(mod_no: TWL_MODULE_PM_RECEIVER, val: &temp,
862 TWL4030_DCDC_GLOBAL_CFG);
863 temp |= SMARTREFLEX_ENABLE;
864 twl_i2c_write_u8(mod_no: TWL_MODULE_PM_RECEIVER, val: temp,
865 TWL4030_DCDC_GLOBAL_CFG);
866 }
867
868 if (twl_class_is_6030()) {
869 const struct mfd_cell *cells;
870 int num_cells;
871
872 if (id->driver_data & TWL6032_SUBCLASS) {
873 cells = twl6032_cells;
874 num_cells = ARRAY_SIZE(twl6032_cells);
875 } else {
876 cells = twl6030_cells;
877 num_cells = ARRAY_SIZE(twl6030_cells);
878 }
879
880 status = devm_mfd_add_devices(dev: &client->dev, PLATFORM_DEVID_NONE,
881 cells, n_devs: num_cells, NULL, irq_base: 0, NULL);
882 if (status < 0)
883 goto free;
884
885 if (of_device_is_system_power_controller(np: node)) {
886 if (!pm_power_off)
887 pm_power_off = twl6030_power_off;
888 else
889 dev_warn(&client->dev, "Poweroff callback already assigned\n");
890 }
891 }
892
893 status = of_platform_populate(root: node, NULL, lookup: twl_auxdata_lookup,
894 parent: &client->dev);
895
896fail:
897 if (status < 0)
898 twl_remove(client);
899free:
900 if (status < 0)
901 platform_device_unregister(pdev);
902
903 return status;
904}
905
906static int __maybe_unused twl_suspend(struct device *dev)
907{
908 struct i2c_client *client = to_i2c_client(dev);
909
910 if (client->irq)
911 disable_irq(irq: client->irq);
912
913 return 0;
914}
915
916static int __maybe_unused twl_resume(struct device *dev)
917{
918 struct i2c_client *client = to_i2c_client(dev);
919
920 if (client->irq)
921 enable_irq(irq: client->irq);
922
923 return 0;
924}
925
926static SIMPLE_DEV_PM_OPS(twl_dev_pm_ops, twl_suspend, twl_resume);
927
928static const struct i2c_device_id twl_ids[] = {
929 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */
930 { "twl5030", 0 }, /* T2 updated */
931 { "twl5031", TWL5031 }, /* TWL5030 updated */
932 { "tps65950", 0 }, /* catalog version of twl5030 */
933 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */
934 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */
935 { "tps65921", TPS_SUBSET }, /* fewer LDOs; no codec, no LED
936 and vibrator. Charger in USB module*/
937 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */
938 { "twl6032", TWL6030_CLASS | TWL6032_SUBCLASS }, /* "Phoenix lite" */
939 { /* end of list */ },
940};
941
942/* One Client Driver , 4 Clients */
943static struct i2c_driver twl_driver = {
944 .driver.name = DRIVER_NAME,
945 .driver.pm = &twl_dev_pm_ops,
946 .id_table = twl_ids,
947 .probe = twl_probe,
948 .remove = twl_remove,
949};
950builtin_i2c_driver(twl_driver);
951

source code of linux/drivers/mfd/twl-core.c