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