1 /* 2 * twl_core.c - driver for TWL4030/TWL5030/TWL60X0/TPS659x0 PM 3 * and audio CODEC devices 4 * 5 * Copyright (C) 2005-2006 Texas Instruments, Inc. 6 * 7 * Modifications to defer interrupt handling to a kernel thread: 8 * Copyright (C) 2006 MontaVista Software, Inc. 9 * 10 * Based on tlv320aic23.c: 11 * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> 12 * 13 * Code cleanup and modifications to IRQ handler. 14 * by syed khasim <x0khasim@ti.com> 15 * 16 * This program is free software; you can redistribute it and/or modify 17 * it under the terms of the GNU General Public License as published by 18 * the Free Software Foundation; either version 2 of the License, or 19 * (at your option) any later version. 20 * 21 * This program is distributed in the hope that it will be useful, 22 * but WITHOUT ANY WARRANTY; without even the implied warranty of 23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 24 * GNU General Public License for more details. 25 * 26 * You should have received a copy of the GNU General Public License 27 * along with this program; if not, write to the Free Software 28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 29 */ 30 31 #include <linux/init.h> 32 #include <linux/mutex.h> 33 #include <linux/platform_device.h> 34 #include <linux/clk.h> 35 #include <linux/err.h> 36 37 #include <linux/regulator/machine.h> 38 39 #include <linux/i2c.h> 40 #include <linux/i2c/twl.h> 41 42 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) 43 #include <plat/cpu.h> 44 #endif 45 46 /* 47 * The TWL4030 "Triton 2" is one of a family of a multi-function "Power 48 * Management and System Companion Device" chips originally designed for 49 * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, 50 * often at around 3 Mbit/sec, including for interrupt handling. 51 * 52 * This driver core provides genirq support for the interrupts emitted, 53 * by the various modules, and exports register access primitives. 54 * 55 * FIXME this driver currently requires use of the first interrupt line 56 * (and associated registers). 57 */ 58 59 #define DRIVER_NAME "twl" 60 61 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE) 62 #define twl_has_keypad() true 63 #else 64 #define twl_has_keypad() false 65 #endif 66 67 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE) 68 #define twl_has_gpio() true 69 #else 70 #define twl_has_gpio() false 71 #endif 72 73 #if defined(CONFIG_REGULATOR_TWL4030) \ 74 || defined(CONFIG_REGULATOR_TWL4030_MODULE) 75 #define twl_has_regulator() true 76 #else 77 #define twl_has_regulator() false 78 #endif 79 80 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE) 81 #define twl_has_madc() true 82 #else 83 #define twl_has_madc() false 84 #endif 85 86 #ifdef CONFIG_TWL4030_POWER 87 #define twl_has_power() true 88 #else 89 #define twl_has_power() false 90 #endif 91 92 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE) 93 #define twl_has_rtc() true 94 #else 95 #define twl_has_rtc() false 96 #endif 97 98 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\ 99 defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE) 100 #define twl_has_usb() true 101 #else 102 #define twl_has_usb() false 103 #endif 104 105 #if defined(CONFIG_TWL4030_WATCHDOG) || \ 106 defined(CONFIG_TWL4030_WATCHDOG_MODULE) 107 #define twl_has_watchdog() true 108 #else 109 #define twl_has_watchdog() false 110 #endif 111 112 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\ 113 defined(CONFIG_SND_SOC_TWL6040) || defined(CONFIG_SND_SOC_TWL6040_MODULE) 114 #define twl_has_codec() true 115 #else 116 #define twl_has_codec() false 117 #endif 118 119 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE) 120 #define twl_has_bci() true 121 #else 122 #define twl_has_bci() false 123 #endif 124 125 /* Triton Core internal information (BEGIN) */ 126 127 /* Last - for index max*/ 128 #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG 129 130 #define TWL_NUM_SLAVES 4 131 132 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \ 133 || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE) 134 #define twl_has_pwrbutton() true 135 #else 136 #define twl_has_pwrbutton() false 137 #endif 138 139 #define SUB_CHIP_ID0 0 140 #define SUB_CHIP_ID1 1 141 #define SUB_CHIP_ID2 2 142 #define SUB_CHIP_ID3 3 143 144 #define TWL_MODULE_LAST TWL4030_MODULE_LAST 145 146 /* Base Address defns for twl4030_map[] */ 147 148 /* subchip/slave 0 - USB ID */ 149 #define TWL4030_BASEADD_USB 0x0000 150 151 /* subchip/slave 1 - AUD ID */ 152 #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 153 #define TWL4030_BASEADD_GPIO 0x0098 154 #define TWL4030_BASEADD_INTBR 0x0085 155 #define TWL4030_BASEADD_PIH 0x0080 156 #define TWL4030_BASEADD_TEST 0x004C 157 158 /* subchip/slave 2 - AUX ID */ 159 #define TWL4030_BASEADD_INTERRUPTS 0x00B9 160 #define TWL4030_BASEADD_LED 0x00EE 161 #define TWL4030_BASEADD_MADC 0x0000 162 #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 163 #define TWL4030_BASEADD_PRECHARGE 0x00AA 164 #define TWL4030_BASEADD_PWM0 0x00F8 165 #define TWL4030_BASEADD_PWM1 0x00FB 166 #define TWL4030_BASEADD_PWMA 0x00EF 167 #define TWL4030_BASEADD_PWMB 0x00F1 168 #define TWL4030_BASEADD_KEYPAD 0x00D2 169 170 #define TWL5031_BASEADD_ACCESSORY 0x0074 /* Replaces Main Charge */ 171 #define TWL5031_BASEADD_INTERRUPTS 0x00B9 /* Different than TWL4030's 172 one */ 173 174 /* subchip/slave 3 - POWER ID */ 175 #define TWL4030_BASEADD_BACKUP 0x0014 176 #define TWL4030_BASEADD_INT 0x002E 177 #define TWL4030_BASEADD_PM_MASTER 0x0036 178 #define TWL4030_BASEADD_PM_RECEIVER 0x005B 179 #define TWL4030_BASEADD_RTC 0x001C 180 #define TWL4030_BASEADD_SECURED_REG 0x0000 181 182 /* Triton Core internal information (END) */ 183 184 185 /* subchip/slave 0 0x48 - POWER */ 186 #define TWL6030_BASEADD_RTC 0x0000 187 #define TWL6030_BASEADD_MEM 0x0017 188 #define TWL6030_BASEADD_PM_MASTER 0x001F 189 #define TWL6030_BASEADD_PM_SLAVE_MISC 0x0030 /* PM_RECEIVER */ 190 #define TWL6030_BASEADD_PM_MISC 0x00E2 191 #define TWL6030_BASEADD_PM_PUPD 0x00F0 192 193 /* subchip/slave 1 0x49 - FEATURE */ 194 #define TWL6030_BASEADD_USB 0x0000 195 #define TWL6030_BASEADD_GPADC_CTRL 0x002E 196 #define TWL6030_BASEADD_AUX 0x0090 197 #define TWL6030_BASEADD_PWM 0x00BA 198 #define TWL6030_BASEADD_GASGAUGE 0x00C0 199 #define TWL6030_BASEADD_PIH 0x00D0 200 #define TWL6030_BASEADD_CHARGER 0x00E0 201 202 /* subchip/slave 2 0x4A - DFT */ 203 #define TWL6030_BASEADD_DIEID 0x00C0 204 205 /* subchip/slave 3 0x4B - AUDIO */ 206 #define TWL6030_BASEADD_AUDIO 0x0000 207 #define TWL6030_BASEADD_RSV 0x0000 208 #define TWL6030_BASEADD_ZERO 0x0000 209 210 /* Few power values */ 211 #define R_CFG_BOOT 0x05 212 213 /* some fields in R_CFG_BOOT */ 214 #define HFCLK_FREQ_19p2_MHZ (1 << 0) 215 #define HFCLK_FREQ_26_MHZ (2 << 0) 216 #define HFCLK_FREQ_38p4_MHZ (3 << 0) 217 #define HIGH_PERF_SQ (1 << 3) 218 #define CK32K_LOWPWR_EN (1 << 7) 219 220 221 /* chip-specific feature flags, for i2c_device_id.driver_data */ 222 #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ 223 #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ 224 #define TWL5031 BIT(2) /* twl5031 has different registers */ 225 #define TWL6030_CLASS BIT(3) /* TWL6030 class */ 226 227 /*----------------------------------------------------------------------*/ 228 229 /* is driver active, bound to a chip? */ 230 static bool inuse; 231 232 static unsigned int twl_id; 233 unsigned int twl_rev(void) 234 { 235 return twl_id; 236 } 237 EXPORT_SYMBOL(twl_rev); 238 239 /* Structure for each TWL4030/TWL6030 Slave */ 240 struct twl_client { 241 struct i2c_client *client; 242 u8 address; 243 244 /* max numb of i2c_msg required is for read =2 */ 245 struct i2c_msg xfer_msg[2]; 246 247 /* To lock access to xfer_msg */ 248 struct mutex xfer_lock; 249 }; 250 251 static struct twl_client twl_modules[TWL_NUM_SLAVES]; 252 253 254 /* mapping the module id to slave id and base address */ 255 struct twl_mapping { 256 unsigned char sid; /* Slave ID */ 257 unsigned char base; /* base address */ 258 }; 259 static struct twl_mapping *twl_map; 260 261 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { 262 /* 263 * NOTE: don't change this table without updating the 264 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 265 * so they continue to match the order in this table. 266 */ 267 268 { 0, TWL4030_BASEADD_USB }, 269 270 { 1, TWL4030_BASEADD_AUDIO_VOICE }, 271 { 1, TWL4030_BASEADD_GPIO }, 272 { 1, TWL4030_BASEADD_INTBR }, 273 { 1, TWL4030_BASEADD_PIH }, 274 { 1, TWL4030_BASEADD_TEST }, 275 276 { 2, TWL4030_BASEADD_KEYPAD }, 277 { 2, TWL4030_BASEADD_MADC }, 278 { 2, TWL4030_BASEADD_INTERRUPTS }, 279 { 2, TWL4030_BASEADD_LED }, 280 { 2, TWL4030_BASEADD_MAIN_CHARGE }, 281 { 2, TWL4030_BASEADD_PRECHARGE }, 282 { 2, TWL4030_BASEADD_PWM0 }, 283 { 2, TWL4030_BASEADD_PWM1 }, 284 { 2, TWL4030_BASEADD_PWMA }, 285 { 2, TWL4030_BASEADD_PWMB }, 286 { 2, TWL5031_BASEADD_ACCESSORY }, 287 { 2, TWL5031_BASEADD_INTERRUPTS }, 288 289 { 3, TWL4030_BASEADD_BACKUP }, 290 { 3, TWL4030_BASEADD_INT }, 291 { 3, TWL4030_BASEADD_PM_MASTER }, 292 { 3, TWL4030_BASEADD_PM_RECEIVER }, 293 { 3, TWL4030_BASEADD_RTC }, 294 { 3, TWL4030_BASEADD_SECURED_REG }, 295 }; 296 297 static struct twl_mapping twl6030_map[] = { 298 /* 299 * NOTE: don't change this table without updating the 300 * <linux/i2c/twl.h> defines for TWL4030_MODULE_* 301 * so they continue to match the order in this table. 302 */ 303 { SUB_CHIP_ID1, TWL6030_BASEADD_USB }, 304 { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO }, 305 { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID }, 306 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 307 { SUB_CHIP_ID1, TWL6030_BASEADD_PIH }, 308 309 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 310 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 311 { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL }, 312 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 313 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 314 315 { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER }, 316 { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE }, 317 { SUB_CHIP_ID1, TWL6030_BASEADD_PWM }, 318 { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO }, 319 { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO }, 320 321 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO }, 322 { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO }, 323 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 324 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 325 { SUB_CHIP_ID2, TWL6030_BASEADD_RSV }, 326 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER }, 327 { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC }, 328 329 { SUB_CHIP_ID0, TWL6030_BASEADD_RTC }, 330 { SUB_CHIP_ID0, TWL6030_BASEADD_MEM }, 331 }; 332 333 /*----------------------------------------------------------------------*/ 334 335 /* Exported Functions */ 336 337 /** 338 * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0 339 * @mod_no: module number 340 * @value: an array of num_bytes+1 containing data to write 341 * @reg: register address (just offset will do) 342 * @num_bytes: number of bytes to transfer 343 * 344 * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and 345 * valid data starts at Offset 1. 346 * 347 * Returns the result of operation - 0 is success 348 */ 349 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 350 { 351 int ret; 352 int sid; 353 struct twl_client *twl; 354 struct i2c_msg *msg; 355 356 if (unlikely(mod_no > TWL_MODULE_LAST)) { 357 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 358 return -EPERM; 359 } 360 sid = twl_map[mod_no].sid; 361 twl = &twl_modules[sid]; 362 363 if (unlikely(!inuse)) { 364 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 365 return -EPERM; 366 } 367 mutex_lock(&twl->xfer_lock); 368 /* 369 * [MSG1]: fill the register address data 370 * fill the data Tx buffer 371 */ 372 msg = &twl->xfer_msg[0]; 373 msg->addr = twl->address; 374 msg->len = num_bytes + 1; 375 msg->flags = 0; 376 msg->buf = value; 377 /* over write the first byte of buffer with the register address */ 378 *value = twl_map[mod_no].base + reg; 379 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); 380 mutex_unlock(&twl->xfer_lock); 381 382 /* i2c_transfer returns number of messages transferred */ 383 if (ret != 1) { 384 pr_err("%s: i2c_write failed to transfer all messages\n", 385 DRIVER_NAME); 386 if (ret < 0) 387 return ret; 388 else 389 return -EIO; 390 } else { 391 return 0; 392 } 393 } 394 EXPORT_SYMBOL(twl_i2c_write); 395 396 /** 397 * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0 398 * @mod_no: module number 399 * @value: an array of num_bytes containing data to be read 400 * @reg: register address (just offset will do) 401 * @num_bytes: number of bytes to transfer 402 * 403 * Returns result of operation - num_bytes is success else failure. 404 */ 405 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) 406 { 407 int ret; 408 u8 val; 409 int sid; 410 struct twl_client *twl; 411 struct i2c_msg *msg; 412 413 if (unlikely(mod_no > TWL_MODULE_LAST)) { 414 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); 415 return -EPERM; 416 } 417 sid = twl_map[mod_no].sid; 418 twl = &twl_modules[sid]; 419 420 if (unlikely(!inuse)) { 421 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); 422 return -EPERM; 423 } 424 mutex_lock(&twl->xfer_lock); 425 /* [MSG1] fill the register address data */ 426 msg = &twl->xfer_msg[0]; 427 msg->addr = twl->address; 428 msg->len = 1; 429 msg->flags = 0; /* Read the register value */ 430 val = twl_map[mod_no].base + reg; 431 msg->buf = &val; 432 /* [MSG2] fill the data rx buffer */ 433 msg = &twl->xfer_msg[1]; 434 msg->addr = twl->address; 435 msg->flags = I2C_M_RD; /* Read the register value */ 436 msg->len = num_bytes; /* only n bytes */ 437 msg->buf = value; 438 ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); 439 mutex_unlock(&twl->xfer_lock); 440 441 /* i2c_transfer returns number of messages transferred */ 442 if (ret != 2) { 443 pr_err("%s: i2c_read failed to transfer all messages\n", 444 DRIVER_NAME); 445 if (ret < 0) 446 return ret; 447 else 448 return -EIO; 449 } else { 450 return 0; 451 } 452 } 453 EXPORT_SYMBOL(twl_i2c_read); 454 455 /** 456 * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0 457 * @mod_no: module number 458 * @value: the value to be written 8 bit 459 * @reg: register address (just offset will do) 460 * 461 * Returns result of operation - 0 is success 462 */ 463 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg) 464 { 465 466 /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ 467 u8 temp_buffer[2] = { 0 }; 468 /* offset 1 contains the data */ 469 temp_buffer[1] = value; 470 return twl_i2c_write(mod_no, temp_buffer, reg, 1); 471 } 472 EXPORT_SYMBOL(twl_i2c_write_u8); 473 474 /** 475 * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0 476 * @mod_no: module number 477 * @value: the value read 8 bit 478 * @reg: register address (just offset will do) 479 * 480 * Returns result of operation - 0 is success 481 */ 482 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) 483 { 484 return twl_i2c_read(mod_no, value, reg, 1); 485 } 486 EXPORT_SYMBOL(twl_i2c_read_u8); 487 488 /*----------------------------------------------------------------------*/ 489 490 static struct device * 491 add_numbered_child(unsigned chip, const char *name, int num, 492 void *pdata, unsigned pdata_len, 493 bool can_wakeup, int irq0, int irq1) 494 { 495 struct platform_device *pdev; 496 struct twl_client *twl = &twl_modules[chip]; 497 int status; 498 499 pdev = platform_device_alloc(name, num); 500 if (!pdev) { 501 dev_dbg(&twl->client->dev, "can't alloc dev\n"); 502 status = -ENOMEM; 503 goto err; 504 } 505 506 device_init_wakeup(&pdev->dev, can_wakeup); 507 pdev->dev.parent = &twl->client->dev; 508 509 if (pdata) { 510 status = platform_device_add_data(pdev, pdata, pdata_len); 511 if (status < 0) { 512 dev_dbg(&pdev->dev, "can't add platform_data\n"); 513 goto err; 514 } 515 } 516 517 if (irq0) { 518 struct resource r[2] = { 519 { .start = irq0, .flags = IORESOURCE_IRQ, }, 520 { .start = irq1, .flags = IORESOURCE_IRQ, }, 521 }; 522 523 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); 524 if (status < 0) { 525 dev_dbg(&pdev->dev, "can't add irqs\n"); 526 goto err; 527 } 528 } 529 530 status = platform_device_add(pdev); 531 532 err: 533 if (status < 0) { 534 platform_device_put(pdev); 535 dev_err(&twl->client->dev, "can't add %s dev\n", name); 536 return ERR_PTR(status); 537 } 538 return &pdev->dev; 539 } 540 541 static inline struct device *add_child(unsigned chip, const char *name, 542 void *pdata, unsigned pdata_len, 543 bool can_wakeup, int irq0, int irq1) 544 { 545 return add_numbered_child(chip, name, -1, pdata, pdata_len, 546 can_wakeup, irq0, irq1); 547 } 548 549 static struct device * 550 add_regulator_linked(int num, struct regulator_init_data *pdata, 551 struct regulator_consumer_supply *consumers, 552 unsigned num_consumers) 553 { 554 unsigned sub_chip_id; 555 /* regulator framework demands init_data ... */ 556 if (!pdata) 557 return NULL; 558 559 if (consumers) { 560 pdata->consumer_supplies = consumers; 561 pdata->num_consumer_supplies = num_consumers; 562 } 563 564 /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ 565 sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid; 566 return add_numbered_child(sub_chip_id, "twl_reg", num, 567 pdata, sizeof(*pdata), false, 0, 0); 568 } 569 570 static struct device * 571 add_regulator(int num, struct regulator_init_data *pdata) 572 { 573 return add_regulator_linked(num, pdata, NULL, 0); 574 } 575 576 /* 577 * NOTE: We know the first 8 IRQs after pdata->base_irq are 578 * for the PIH, and the next are for the PWR_INT SIH, since 579 * that's how twl_init_irq() sets things up. 580 */ 581 582 static int 583 add_children(struct twl4030_platform_data *pdata, unsigned long features) 584 { 585 struct device *child; 586 unsigned sub_chip_id; 587 588 if (twl_has_gpio() && pdata->gpio) { 589 child = add_child(SUB_CHIP_ID1, "twl4030_gpio", 590 pdata->gpio, sizeof(*pdata->gpio), 591 false, pdata->irq_base + GPIO_INTR_OFFSET, 0); 592 if (IS_ERR(child)) 593 return PTR_ERR(child); 594 } 595 596 if (twl_has_keypad() && pdata->keypad) { 597 child = add_child(SUB_CHIP_ID2, "twl4030_keypad", 598 pdata->keypad, sizeof(*pdata->keypad), 599 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0); 600 if (IS_ERR(child)) 601 return PTR_ERR(child); 602 } 603 604 if (twl_has_madc() && pdata->madc) { 605 child = add_child(2, "twl4030_madc", 606 pdata->madc, sizeof(*pdata->madc), 607 true, pdata->irq_base + MADC_INTR_OFFSET, 0); 608 if (IS_ERR(child)) 609 return PTR_ERR(child); 610 } 611 612 if (twl_has_rtc()) { 613 /* 614 * REVISIT platform_data here currently might expose the 615 * "msecure" line ... but for now we just expect board 616 * setup to tell the chip "it's always ok to SET_TIME". 617 * Eventually, Linux might become more aware of such 618 * HW security concerns, and "least privilege". 619 */ 620 sub_chip_id = twl_map[TWL_MODULE_RTC].sid; 621 child = add_child(sub_chip_id, "twl_rtc", 622 NULL, 0, 623 true, pdata->irq_base + RTC_INTR_OFFSET, 0); 624 if (IS_ERR(child)) 625 return PTR_ERR(child); 626 } 627 628 if (twl_has_usb() && pdata->usb && twl_class_is_4030()) { 629 630 static struct regulator_consumer_supply usb1v5 = { 631 .supply = "usb1v5", 632 }; 633 static struct regulator_consumer_supply usb1v8 = { 634 .supply = "usb1v8", 635 }; 636 static struct regulator_consumer_supply usb3v1 = { 637 .supply = "usb3v1", 638 }; 639 640 /* First add the regulators so that they can be used by transceiver */ 641 if (twl_has_regulator()) { 642 /* this is a template that gets copied */ 643 struct regulator_init_data usb_fixed = { 644 .constraints.valid_modes_mask = 645 REGULATOR_MODE_NORMAL 646 | REGULATOR_MODE_STANDBY, 647 .constraints.valid_ops_mask = 648 REGULATOR_CHANGE_MODE 649 | REGULATOR_CHANGE_STATUS, 650 }; 651 652 child = add_regulator_linked(TWL4030_REG_VUSB1V5, 653 &usb_fixed, &usb1v5, 1); 654 if (IS_ERR(child)) 655 return PTR_ERR(child); 656 657 child = add_regulator_linked(TWL4030_REG_VUSB1V8, 658 &usb_fixed, &usb1v8, 1); 659 if (IS_ERR(child)) 660 return PTR_ERR(child); 661 662 child = add_regulator_linked(TWL4030_REG_VUSB3V1, 663 &usb_fixed, &usb3v1, 1); 664 if (IS_ERR(child)) 665 return PTR_ERR(child); 666 667 } 668 669 child = add_child(0, "twl4030_usb", 670 pdata->usb, sizeof(*pdata->usb), 671 true, 672 /* irq0 = USB_PRES, irq1 = USB */ 673 pdata->irq_base + USB_PRES_INTR_OFFSET, 674 pdata->irq_base + USB_INTR_OFFSET); 675 676 if (IS_ERR(child)) 677 return PTR_ERR(child); 678 679 /* we need to connect regulators to this transceiver */ 680 if (twl_has_regulator() && child) { 681 usb1v5.dev = child; 682 usb1v8.dev = child; 683 usb3v1.dev = child; 684 } 685 } 686 if (twl_has_usb() && pdata->usb && twl_class_is_6030()) { 687 688 static struct regulator_consumer_supply usb3v3 = { 689 .supply = "vusb", 690 }; 691 692 if (twl_has_regulator()) { 693 /* this is a template that gets copied */ 694 struct regulator_init_data usb_fixed = { 695 .constraints.valid_modes_mask = 696 REGULATOR_MODE_NORMAL 697 | REGULATOR_MODE_STANDBY, 698 .constraints.valid_ops_mask = 699 REGULATOR_CHANGE_MODE 700 | REGULATOR_CHANGE_STATUS, 701 }; 702 703 child = add_regulator_linked(TWL6030_REG_VUSB, 704 &usb_fixed, &usb3v3, 1); 705 if (IS_ERR(child)) 706 return PTR_ERR(child); 707 } 708 709 child = add_child(0, "twl6030_usb", 710 pdata->usb, sizeof(*pdata->usb), 711 true, 712 /* irq1 = VBUS_PRES, irq0 = USB ID */ 713 pdata->irq_base + USBOTG_INTR_OFFSET, 714 pdata->irq_base + USB_PRES_INTR_OFFSET); 715 716 if (IS_ERR(child)) 717 return PTR_ERR(child); 718 /* we need to connect regulators to this transceiver */ 719 if (twl_has_regulator() && child) 720 usb3v3.dev = child; 721 722 } 723 724 if (twl_has_watchdog()) { 725 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); 726 if (IS_ERR(child)) 727 return PTR_ERR(child); 728 } 729 730 if (twl_has_pwrbutton()) { 731 child = add_child(1, "twl4030_pwrbutton", 732 NULL, 0, true, pdata->irq_base + 8 + 0, 0); 733 if (IS_ERR(child)) 734 return PTR_ERR(child); 735 } 736 737 if (twl_has_codec() && pdata->codec && twl_class_is_4030()) { 738 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid; 739 child = add_child(sub_chip_id, "twl4030-audio", 740 pdata->codec, sizeof(*pdata->codec), 741 false, 0, 0); 742 if (IS_ERR(child)) 743 return PTR_ERR(child); 744 } 745 746 /* Phoenix codec driver is probed directly atm */ 747 if (twl_has_codec() && pdata->codec && twl_class_is_6030()) { 748 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid; 749 child = add_child(sub_chip_id, "twl6040-codec", 750 pdata->codec, sizeof(*pdata->codec), 751 false, 0, 0); 752 if (IS_ERR(child)) 753 return PTR_ERR(child); 754 } 755 756 /* twl4030 regulators */ 757 if (twl_has_regulator() && twl_class_is_4030()) { 758 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); 759 if (IS_ERR(child)) 760 return PTR_ERR(child); 761 762 child = add_regulator(TWL4030_REG_VIO, pdata->vio); 763 if (IS_ERR(child)) 764 return PTR_ERR(child); 765 766 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1); 767 if (IS_ERR(child)) 768 return PTR_ERR(child); 769 770 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2); 771 if (IS_ERR(child)) 772 return PTR_ERR(child); 773 774 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); 775 if (IS_ERR(child)) 776 return PTR_ERR(child); 777 778 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); 779 if (IS_ERR(child)) 780 return PTR_ERR(child); 781 782 child = add_regulator((features & TWL4030_VAUX2) 783 ? TWL4030_REG_VAUX2_4030 784 : TWL4030_REG_VAUX2, 785 pdata->vaux2); 786 if (IS_ERR(child)) 787 return PTR_ERR(child); 788 789 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1); 790 if (IS_ERR(child)) 791 return PTR_ERR(child); 792 793 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2); 794 if (IS_ERR(child)) 795 return PTR_ERR(child); 796 797 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig); 798 if (IS_ERR(child)) 799 return PTR_ERR(child); 800 } 801 802 /* maybe add LDOs that are omitted on cost-reduced parts */ 803 if (twl_has_regulator() && !(features & TPS_SUBSET) 804 && twl_class_is_4030()) { 805 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); 806 if (IS_ERR(child)) 807 return PTR_ERR(child); 808 809 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); 810 if (IS_ERR(child)) 811 return PTR_ERR(child); 812 813 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); 814 if (IS_ERR(child)) 815 return PTR_ERR(child); 816 817 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); 818 if (IS_ERR(child)) 819 return PTR_ERR(child); 820 821 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); 822 if (IS_ERR(child)) 823 return PTR_ERR(child); 824 825 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); 826 if (IS_ERR(child)) 827 return PTR_ERR(child); 828 } 829 830 /* twl6030 regulators */ 831 if (twl_has_regulator() && twl_class_is_6030()) { 832 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc); 833 if (IS_ERR(child)) 834 return PTR_ERR(child); 835 836 child = add_regulator(TWL6030_REG_VPP, pdata->vpp); 837 if (IS_ERR(child)) 838 return PTR_ERR(child); 839 840 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim); 841 if (IS_ERR(child)) 842 return PTR_ERR(child); 843 844 child = add_regulator(TWL6030_REG_VANA, pdata->vana); 845 if (IS_ERR(child)) 846 return PTR_ERR(child); 847 848 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio); 849 if (IS_ERR(child)) 850 return PTR_ERR(child); 851 852 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac); 853 if (IS_ERR(child)) 854 return PTR_ERR(child); 855 856 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1); 857 if (IS_ERR(child)) 858 return PTR_ERR(child); 859 860 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2); 861 if (IS_ERR(child)) 862 return PTR_ERR(child); 863 864 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3); 865 if (IS_ERR(child)) 866 return PTR_ERR(child); 867 } 868 869 if (twl_has_bci() && pdata->bci && 870 !(features & (TPS_SUBSET | TWL5031))) { 871 child = add_child(3, "twl4030_bci", 872 pdata->bci, sizeof(*pdata->bci), false, 873 /* irq0 = CHG_PRES, irq1 = BCI */ 874 pdata->irq_base + BCI_PRES_INTR_OFFSET, 875 pdata->irq_base + BCI_INTR_OFFSET); 876 if (IS_ERR(child)) 877 return PTR_ERR(child); 878 } 879 880 return 0; 881 } 882 883 /*----------------------------------------------------------------------*/ 884 885 /* 886 * These three functions initialize the on-chip clock framework, 887 * letting it generate the right frequencies for USB, MADC, and 888 * other purposes. 889 */ 890 static inline int __init protect_pm_master(void) 891 { 892 int e = 0; 893 894 e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0, 895 TWL4030_PM_MASTER_PROTECT_KEY); 896 return e; 897 } 898 899 static inline int __init unprotect_pm_master(void) 900 { 901 int e = 0; 902 903 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 904 TWL4030_PM_MASTER_KEY_CFG1, 905 TWL4030_PM_MASTER_PROTECT_KEY); 906 e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 907 TWL4030_PM_MASTER_KEY_CFG2, 908 TWL4030_PM_MASTER_PROTECT_KEY); 909 910 return e; 911 } 912 913 static void clocks_init(struct device *dev, 914 struct twl4030_clock_init_data *clock) 915 { 916 int e = 0; 917 struct clk *osc; 918 u32 rate; 919 u8 ctrl = HFCLK_FREQ_26_MHZ; 920 921 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) 922 if (cpu_is_omap2430()) 923 osc = clk_get(dev, "osc_ck"); 924 else 925 osc = clk_get(dev, "osc_sys_ck"); 926 927 if (IS_ERR(osc)) { 928 printk(KERN_WARNING "Skipping twl internal clock init and " 929 "using bootloader value (unknown osc rate)\n"); 930 return; 931 } 932 933 rate = clk_get_rate(osc); 934 clk_put(osc); 935 936 #else 937 /* REVISIT for non-OMAP systems, pass the clock rate from 938 * board init code, using platform_data. 939 */ 940 osc = ERR_PTR(-EIO); 941 942 printk(KERN_WARNING "Skipping twl internal clock init and " 943 "using bootloader value (unknown osc rate)\n"); 944 945 return; 946 #endif 947 948 switch (rate) { 949 case 19200000: 950 ctrl = HFCLK_FREQ_19p2_MHZ; 951 break; 952 case 26000000: 953 ctrl = HFCLK_FREQ_26_MHZ; 954 break; 955 case 38400000: 956 ctrl = HFCLK_FREQ_38p4_MHZ; 957 break; 958 } 959 960 ctrl |= HIGH_PERF_SQ; 961 if (clock && clock->ck32k_lowpwr_enable) 962 ctrl |= CK32K_LOWPWR_EN; 963 964 e |= unprotect_pm_master(); 965 /* effect->MADC+USB ck en */ 966 e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); 967 e |= protect_pm_master(); 968 969 if (e < 0) 970 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); 971 } 972 973 /*----------------------------------------------------------------------*/ 974 975 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 976 int twl4030_exit_irq(void); 977 int twl4030_init_chip_irq(const char *chip); 978 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); 979 int twl6030_exit_irq(void); 980 981 static int twl_remove(struct i2c_client *client) 982 { 983 unsigned i; 984 int status; 985 986 if (twl_class_is_4030()) 987 status = twl4030_exit_irq(); 988 else 989 status = twl6030_exit_irq(); 990 991 if (status < 0) 992 return status; 993 994 for (i = 0; i < TWL_NUM_SLAVES; i++) { 995 struct twl_client *twl = &twl_modules[i]; 996 997 if (twl->client && twl->client != client) 998 i2c_unregister_device(twl->client); 999 twl_modules[i].client = NULL; 1000 } 1001 inuse = false; 1002 return 0; 1003 } 1004 1005 /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ 1006 static int __devinit 1007 twl_probe(struct i2c_client *client, const struct i2c_device_id *id) 1008 { 1009 int status; 1010 unsigned i; 1011 struct twl4030_platform_data *pdata = client->dev.platform_data; 1012 u8 temp; 1013 1014 if (!pdata) { 1015 dev_dbg(&client->dev, "no platform data?\n"); 1016 return -EINVAL; 1017 } 1018 1019 if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { 1020 dev_dbg(&client->dev, "can't talk I2C?\n"); 1021 return -EIO; 1022 } 1023 1024 if (inuse) { 1025 dev_dbg(&client->dev, "driver is already in use\n"); 1026 return -EBUSY; 1027 } 1028 1029 for (i = 0; i < TWL_NUM_SLAVES; i++) { 1030 struct twl_client *twl = &twl_modules[i]; 1031 1032 twl->address = client->addr + i; 1033 if (i == 0) 1034 twl->client = client; 1035 else { 1036 twl->client = i2c_new_dummy(client->adapter, 1037 twl->address); 1038 if (!twl->client) { 1039 dev_err(&client->dev, 1040 "can't attach client %d\n", i); 1041 status = -ENOMEM; 1042 goto fail; 1043 } 1044 } 1045 mutex_init(&twl->xfer_lock); 1046 } 1047 inuse = true; 1048 if ((id->driver_data) & TWL6030_CLASS) { 1049 twl_id = TWL6030_CLASS_ID; 1050 twl_map = &twl6030_map[0]; 1051 } else { 1052 twl_id = TWL4030_CLASS_ID; 1053 twl_map = &twl4030_map[0]; 1054 } 1055 1056 /* setup clock framework */ 1057 clocks_init(&client->dev, pdata->clock); 1058 1059 /* load power event scripts */ 1060 if (twl_has_power() && pdata->power) 1061 twl4030_power_init(pdata->power); 1062 1063 /* Maybe init the T2 Interrupt subsystem */ 1064 if (client->irq 1065 && pdata->irq_base 1066 && pdata->irq_end > pdata->irq_base) { 1067 if (twl_class_is_4030()) { 1068 twl4030_init_chip_irq(id->name); 1069 status = twl4030_init_irq(client->irq, pdata->irq_base, 1070 pdata->irq_end); 1071 } else { 1072 status = twl6030_init_irq(client->irq, pdata->irq_base, 1073 pdata->irq_end); 1074 } 1075 1076 if (status < 0) 1077 goto fail; 1078 } 1079 1080 /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface. 1081 * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0, 1082 * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0. 1083 */ 1084 1085 if (twl_class_is_4030()) { 1086 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1); 1087 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \ 1088 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU); 1089 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1); 1090 } 1091 1092 status = add_children(pdata, id->driver_data); 1093 fail: 1094 if (status < 0) 1095 twl_remove(client); 1096 return status; 1097 } 1098 1099 static const struct i2c_device_id twl_ids[] = { 1100 { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ 1101 { "twl5030", 0 }, /* T2 updated */ 1102 { "twl5031", TWL5031 }, /* TWL5030 updated */ 1103 { "tps65950", 0 }, /* catalog version of twl5030 */ 1104 { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ 1105 { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ 1106 { "twl6030", TWL6030_CLASS }, /* "Phoenix power chip" */ 1107 { /* end of list */ }, 1108 }; 1109 MODULE_DEVICE_TABLE(i2c, twl_ids); 1110 1111 /* One Client Driver , 4 Clients */ 1112 static struct i2c_driver twl_driver = { 1113 .driver.name = DRIVER_NAME, 1114 .id_table = twl_ids, 1115 .probe = twl_probe, 1116 .remove = twl_remove, 1117 }; 1118 1119 static int __init twl_init(void) 1120 { 1121 return i2c_add_driver(&twl_driver); 1122 } 1123 subsys_initcall(twl_init); 1124 1125 static void __exit twl_exit(void) 1126 { 1127 i2c_del_driver(&twl_driver); 1128 } 1129 module_exit(twl_exit); 1130 1131 MODULE_AUTHOR("Texas Instruments, Inc."); 1132 MODULE_DESCRIPTION("I2C Core interface for TWL"); 1133 MODULE_LICENSE("GPL"); 1134