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