drivers/mfd/twl-core.c

   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/module.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/clk.h>
  36 #include <linux/err.h>
  37
  38 #include <linux/regulator/machine.h>
  39
  40 #include <linux/i2c.h>
  41 #include <linux/i2c/twl.h>
  42
  43 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  44 #include <plat/cpu.h>
  45 #endif
  46
  47 /*
  48  * The TWL4030 "Triton 2" is one of a family of a multi-function "Power
  49  * Management and System Companion Device" chips originally designed for
  50  * use in OMAP2 and OMAP 3 based systems.  Its control interfaces use I2C,
  51  * often at around 3 Mbit/sec, including for interrupt handling.
  52  *
  53  * This driver core provides genirq support for the interrupts emitted,
  54  * by the various modules, and exports register access primitives.
  55  *
  56  * FIXME this driver currently requires use of the first interrupt line
  57  * (and associated registers).
  58  */
  59
  60 #define DRIVER_NAME                     "twl"
  61
  62 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  63 #define twl_has_keypad()        true
  64 #else
  65 #define twl_has_keypad()        false
  66 #endif
  67
  68 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  69 #define twl_has_gpio()  true
  70 #else
  71 #define twl_has_gpio()  false
  72 #endif
  73
  74 #if defined(CONFIG_REGULATOR_TWL4030) \
  75         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  76 #define twl_has_regulator()     true
  77 #else
  78 #define twl_has_regulator()     false
  79 #endif
  80
  81 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  82 #define twl_has_madc()  true
  83 #else
  84 #define twl_has_madc()  false
  85 #endif
  86
  87 #ifdef CONFIG_TWL4030_POWER
  88 #define twl_has_power()        true
  89 #else
  90 #define twl_has_power()        false
  91 #endif
  92
  93 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  94 #define twl_has_rtc()   true
  95 #else
  96 #define twl_has_rtc()   false
  97 #endif
  98
  99 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
 100         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 101 #define twl_has_usb()   true
 102 #else
 103 #define twl_has_usb()   false
 104 #endif
 105
 106 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 107         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 108 #define twl_has_watchdog()        true
 109 #else
 110 #define twl_has_watchdog()        false
 111 #endif
 112
 113 #if defined(CONFIG_MFD_TWL4030_AUDIO) || defined(CONFIG_MFD_TWL4030_AUDIO_MODULE) ||\
 114         defined(CONFIG_TWL6040_CORE) || defined(CONFIG_TWL6040_CORE_MODULE)
 115 #define twl_has_codec() true
 116 #else
 117 #define twl_has_codec() false
 118 #endif
 119
 120 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 121 #define twl_has_bci()   true
 122 #else
 123 #define twl_has_bci()   false
 124 #endif
 125
 126 /* Triton Core internal information (BEGIN) */
 127
 128 /* Last - for index max*/
 129 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 130
 131 #define TWL_NUM_SLAVES          4
 132
 133 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 134         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 135 #define twl_has_pwrbutton()     true
 136 #else
 137 #define twl_has_pwrbutton()     false
 138 #endif
 139
 140 #define SUB_CHIP_ID0 0
 141 #define SUB_CHIP_ID1 1
 142 #define SUB_CHIP_ID2 2
 143 #define SUB_CHIP_ID3 3
 144
 145 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 146
 147 /* Base Address defns for twl4030_map[] */
 148
 149 /* subchip/slave 0 - USB ID */
 150 #define TWL4030_BASEADD_USB             0x0000
 151
 152 /* subchip/slave 1 - AUD ID */
 153 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 154 #define TWL4030_BASEADD_GPIO            0x0098
 155 #define TWL4030_BASEADD_INTBR           0x0085
 156 #define TWL4030_BASEADD_PIH             0x0080
 157 #define TWL4030_BASEADD_TEST            0x004C
 158
 159 /* subchip/slave 2 - AUX ID */
 160 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 161 #define TWL4030_BASEADD_LED             0x00EE
 162 #define TWL4030_BASEADD_MADC            0x0000
 163 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 164 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 165 #define TWL4030_BASEADD_PWM0            0x00F8
 166 #define TWL4030_BASEADD_PWM1            0x00FB
 167 #define TWL4030_BASEADD_PWMA            0x00EF
 168 #define TWL4030_BASEADD_PWMB            0x00F1
 169 #define TWL4030_BASEADD_KEYPAD          0x00D2
 170
 171 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 172 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 173                                                   one */
 174
 175 /* subchip/slave 3 - POWER ID */
 176 #define TWL4030_BASEADD_BACKUP          0x0014
 177 #define TWL4030_BASEADD_INT             0x002E
 178 #define TWL4030_BASEADD_PM_MASTER       0x0036
 179 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 180 #define TWL4030_BASEADD_RTC             0x001C
 181 #define TWL4030_BASEADD_SECURED_REG     0x0000
 182
 183 /* Triton Core internal information (END) */
 184
 185
 186 /* subchip/slave 0 0x48 - POWER */
 187 #define TWL6030_BASEADD_RTC             0x0000
 188 #define TWL6030_BASEADD_MEM             0x0017
 189 #define TWL6030_BASEADD_PM_MASTER       0x001F
 190 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 191 #define TWL6030_BASEADD_PM_MISC         0x00E2
 192 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 193
 194 /* subchip/slave 1 0x49 - FEATURE */
 195 #define TWL6030_BASEADD_USB             0x0000
 196 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 197 #define TWL6030_BASEADD_AUX             0x0090
 198 #define TWL6030_BASEADD_PWM             0x00BA
 199 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 200 #define TWL6030_BASEADD_PIH             0x00D0
 201 #define TWL6030_BASEADD_CHARGER         0x00E0
 202 #define TWL6025_BASEADD_CHARGER         0x00DA
 203
 204 /* subchip/slave 2 0x4A - DFT */
 205 #define TWL6030_BASEADD_DIEID           0x00C0
 206
 207 /* subchip/slave 3 0x4B - AUDIO */
 208 #define TWL6030_BASEADD_AUDIO           0x0000
 209 #define TWL6030_BASEADD_RSV             0x0000
 210 #define TWL6030_BASEADD_ZERO            0x0000
 211
 212 /* Few power values */
 213 #define R_CFG_BOOT                      0x05
 214
 215 /* some fields in R_CFG_BOOT */
 216 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 217 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 218 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 219 #define HIGH_PERF_SQ                    (1 << 3)
 220 #define CK32K_LOWPWR_EN                 (1 << 7)
 221
 222
 223 /* chip-specific feature flags, for i2c_device_id.driver_data */
 224 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 225 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 226 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 227 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 228
 229 /*----------------------------------------------------------------------*/
 230
 231 /* is driver active, bound to a chip? */
 232 static bool inuse;
 233
 234 /* TWL IDCODE Register value */
 235 static u32 twl_idcode;
 236
 237 static unsigned int twl_id;
 238 unsigned int twl_rev(void)
 239 {
 240         return twl_id;
 241 }
 242 EXPORT_SYMBOL(twl_rev);
 243
 244 /* Structure for each TWL4030/TWL6030 Slave */
 245 struct twl_client {
 246         struct i2c_client *client;
 247         u8 address;
 248
 249         /* max numb of i2c_msg required is for read =2 */
 250         struct i2c_msg xfer_msg[2];
 251
 252         /* To lock access to xfer_msg */
 253         struct mutex xfer_lock;
 254 };
 255
 256 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 257
 258
 259 /* mapping the module id to slave id and base address */
 260 struct twl_mapping {
 261         unsigned char sid;      /* Slave ID */
 262         unsigned char base;     /* base address */
 263 };
 264 static struct twl_mapping *twl_map;
 265
 266 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 267         /*
 268          * NOTE:  don't change this table without updating the
 269          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 270          * so they continue to match the order in this table.
 271          */
 272
 273         { 0, TWL4030_BASEADD_USB },
 274
 275         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 276         { 1, TWL4030_BASEADD_GPIO },
 277         { 1, TWL4030_BASEADD_INTBR },
 278         { 1, TWL4030_BASEADD_PIH },
 279         { 1, TWL4030_BASEADD_TEST },
 280
 281         { 2, TWL4030_BASEADD_KEYPAD },
 282         { 2, TWL4030_BASEADD_MADC },
 283         { 2, TWL4030_BASEADD_INTERRUPTS },
 284         { 2, TWL4030_BASEADD_LED },
 285         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 286         { 2, TWL4030_BASEADD_PRECHARGE },
 287         { 2, TWL4030_BASEADD_PWM0 },
 288         { 2, TWL4030_BASEADD_PWM1 },
 289         { 2, TWL4030_BASEADD_PWMA },
 290         { 2, TWL4030_BASEADD_PWMB },
 291         { 2, TWL5031_BASEADD_ACCESSORY },
 292         { 2, TWL5031_BASEADD_INTERRUPTS },
 293
 294         { 3, TWL4030_BASEADD_BACKUP },
 295         { 3, TWL4030_BASEADD_INT },
 296         { 3, TWL4030_BASEADD_PM_MASTER },
 297         { 3, TWL4030_BASEADD_PM_RECEIVER },
 298         { 3, TWL4030_BASEADD_RTC },
 299         { 3, TWL4030_BASEADD_SECURED_REG },
 300 };
 301
 302 static struct twl_mapping twl6030_map[] = {
 303         /*
 304          * NOTE:  don't change this table without updating the
 305          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 306          * so they continue to match the order in this table.
 307          */
 308         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 309         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 310         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 311         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 312         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 313
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 315         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 316         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 317         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 318         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 319
 320         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 322         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 323         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 324         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 325
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 328         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 329         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 330         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 331         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 332         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 333
 334         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 335         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 336         { SUB_CHIP_ID1, TWL6025_BASEADD_CHARGER },
 337 };
 338
 339 /*----------------------------------------------------------------------*/
 340
 341 /* Exported Functions */
 342
 343 /**
 344  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 345  * @mod_no: module number
 346  * @value: an array of num_bytes+1 containing data to write
 347  * @reg: register address (just offset will do)
 348  * @num_bytes: number of bytes to transfer
 349  *
 350  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 351  * valid data starts at Offset 1.
 352  *
 353  * Returns the result of operation - 0 is success
 354  */
 355 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 356 {
 357         int ret;
 358         int sid;
 359         struct twl_client *twl;
 360         struct i2c_msg *msg;
 361
 362         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 363                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 364                 return -EPERM;
 365         }
 366         if (unlikely(!inuse)) {
 367                 pr_err("%s: not initialized\n", DRIVER_NAME);
 368                 return -EPERM;
 369         }
 370         sid = twl_map[mod_no].sid;
 371         twl = &twl_modules[sid];
 372
 373         mutex_lock(&twl->xfer_lock);
 374         /*
 375          * [MSG1]: fill the register address data
 376          * fill the data Tx buffer
 377          */
 378         msg = &twl->xfer_msg[0];
 379         msg->addr = twl->address;
 380         msg->len = num_bytes + 1;
 381         msg->flags = 0;
 382         msg->buf = value;
 383         /* over write the first byte of buffer with the register address */
 384         *value = twl_map[mod_no].base + reg;
 385         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 386         mutex_unlock(&twl->xfer_lock);
 387
 388         /* i2c_transfer returns number of messages transferred */
 389         if (ret != 1) {
 390                 pr_err("%s: i2c_write failed to transfer all messages\n",
 391                         DRIVER_NAME);
 392                 if (ret < 0)
 393                         return ret;
 394                 else
 395                         return -EIO;
 396         } else {
 397                 return 0;
 398         }
 399 }
 400 EXPORT_SYMBOL(twl_i2c_write);
 401
 402 /**
 403  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 404  * @mod_no: module number
 405  * @value: an array of num_bytes containing data to be read
 406  * @reg: register address (just offset will do)
 407  * @num_bytes: number of bytes to transfer
 408  *
 409  * Returns result of operation - num_bytes is success else failure.
 410  */
 411 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 412 {
 413         int ret;
 414         u8 val;
 415         int sid;
 416         struct twl_client *twl;
 417         struct i2c_msg *msg;
 418
 419         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 420                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 421                 return -EPERM;
 422         }
 423         if (unlikely(!inuse)) {
 424                 pr_err("%s: not initialized\n", DRIVER_NAME);
 425                 return -EPERM;
 426         }
 427         sid = twl_map[mod_no].sid;
 428         twl = &twl_modules[sid];
 429
 430         mutex_lock(&twl->xfer_lock);
 431         /* [MSG1] fill the register address data */
 432         msg = &twl->xfer_msg[0];
 433         msg->addr = twl->address;
 434         msg->len = 1;
 435         msg->flags = 0; /* Read the register value */
 436         val = twl_map[mod_no].base + reg;
 437         msg->buf = &val;
 438         /* [MSG2] fill the data rx buffer */
 439         msg = &twl->xfer_msg[1];
 440         msg->addr = twl->address;
 441         msg->flags = I2C_M_RD;  /* Read the register value */
 442         msg->len = num_bytes;   /* only n bytes */
 443         msg->buf = value;
 444         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 445         mutex_unlock(&twl->xfer_lock);
 446
 447         /* i2c_transfer returns number of messages transferred */
 448         if (ret != 2) {
 449                 pr_err("%s: i2c_read failed to transfer all messages\n",
 450                         DRIVER_NAME);
 451                 if (ret < 0)
 452                         return ret;
 453                 else
 454                         return -EIO;
 455         } else {
 456                 return 0;
 457         }
 458 }
 459 EXPORT_SYMBOL(twl_i2c_read);
 460
 461 /**
 462  * twl_i2c_rmw_u8 - Reads a 8 bit register, modifies it and writes back
 463  * @mod_no: module number
 464  * @bits_to_clear
 465  * @bits_to_set
 466  * @reg: register address (just offset will do)
 467  *
 468  * Returns result of operation - 0 is success else failure.
 469  */
 470 int twl_i2c_rmw_u8(u8 mod_no, u8 bits_to_clear, u8 bits_to_set, u8 reg)
 471 {
 472         u8 value_w[2] = { 0 };
 473         u8 value = 0;
 474         int ret;
 475         u8 val;
 476         int sid;
 477         struct twl_client *twl;
 478         struct i2c_msg *msg;
 479
 480         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 481                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 482                 return -EPERM;
 483         }
 484         if (unlikely(!inuse)) {
 485                 pr_err("%s: not initialized\n", DRIVER_NAME);
 486                 return -EPERM;
 487         }
 488         sid = twl_map[mod_no].sid;
 489         twl = &twl_modules[sid];
 490
 491         mutex_lock(&twl->xfer_lock);
 492         /* [MSG1] fill the register address data */
 493         msg = &twl->xfer_msg[0];
 494         msg->addr = twl->address;
 495         msg->len = 1;
 496         msg->flags = 0; /* Read the register value */
 497         val = twl_map[mod_no].base + reg;
 498         msg->buf = &val;
 499         /* [MSG2] fill the data rx buffer */
 500         msg = &twl->xfer_msg[1];
 501         msg->addr = twl->address;
 502         msg->flags = I2C_M_RD;  /* Read the register value */
 503         msg->len = 1;
 504         msg->buf = &value;
 505         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 506         /* i2c_transfer returns number of messages transferred */
 507         if (ret != 2) {
 508                 pr_err("%s: i2c_read failed to transfer all messages\n",
 509                         DRIVER_NAME);
 510                 if (ret >= 0)
 511                         ret = -EIO;
 512                 goto out;
 513         }
 514
 515         value &= ~bits_to_clear;
 516         value |= bits_to_set;
 517
 518         value_w[0] = twl_map[mod_no].base + reg;
 519         value_w[1] = value;
 520
 521         msg = &twl->xfer_msg[0];
 522         msg->addr = twl->address;
 523         msg->len = 2;
 524         msg->flags = 0;
 525         msg->buf = value_w;
 526         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 527         /* i2c_transfer returns number of messages transferred */
 528         if (ret != 1) {
 529                 pr_err("%s: i2c_write failed to transfer all messages\n",
 530                         DRIVER_NAME);
 531                 if (ret >= 0)
 532                         ret = -EIO;
 533                 goto out;
 534         }
 535
 536         ret = 0;
 537 out:
 538         mutex_unlock(&twl->xfer_lock);
 539         return ret;
 540 }
 541 EXPORT_SYMBOL(twl_i2c_rmw_u8);
 542
 543 /**
 544  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 545  * @mod_no: module number
 546  * @value: the value to be written 8 bit
 547  * @reg: register address (just offset will do)
 548  *
 549  * Returns result of operation - 0 is success
 550  */
 551 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 552 {
 553
 554         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 555         u8 temp_buffer[2] = { 0 };
 556         /* offset 1 contains the data */
 557         temp_buffer[1] = value;
 558         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 559 }
 560 EXPORT_SYMBOL(twl_i2c_write_u8);
 561
 562 /**
 563  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 564  * @mod_no: module number
 565  * @value: the value read 8 bit
 566  * @reg: register address (just offset will do)
 567  *
 568  * Returns result of operation - 0 is success
 569  */
 570 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 571 {
 572         return twl_i2c_read(mod_no, value, reg, 1);
 573 }
 574 EXPORT_SYMBOL(twl_i2c_read_u8);
 575
 576 /*----------------------------------------------------------------------*/
 577
 578 /**
 579  * twl_read_idcode_register - API to read the IDCODE register.
 580  *
 581  * Unlocks the IDCODE register and read the 32 bit value.
 582  */
 583 static int twl_read_idcode_register(void)
 584 {
 585         int err;
 586
 587         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, TWL_EEPROM_R_UNLOCK,
 588                                                 REG_UNLOCK_TEST_REG);
 589         if (err) {
 590                 pr_err("TWL4030 Unable to unlock IDCODE registers -%d\n", err);
 591                 goto fail;
 592         }
 593
 594         err = twl_i2c_read(TWL4030_MODULE_INTBR, (u8 *)(&twl_idcode),
 595                                                 REG_IDCODE_7_0, 4);
 596         if (err) {
 597                 pr_err("TWL4030: unable to read IDCODE -%d\n", err);
 598                 goto fail;
 599         }
 600
 601         err = twl_i2c_write_u8(TWL4030_MODULE_INTBR, 0x0, REG_UNLOCK_TEST_REG);
 602         if (err)
 603                 pr_err("TWL4030 Unable to relock IDCODE registers -%d\n", err);
 604 fail:
 605         return err;
 606 }
 607
 608 /**
 609  * twl_get_type - API to get TWL Si type.
 610  *
 611  * Api to get the TWL Si type from IDCODE value.
 612  */
 613 int twl_get_type(void)
 614 {
 615         return TWL_SIL_TYPE(twl_idcode);
 616 }
 617 EXPORT_SYMBOL_GPL(twl_get_type);
 618
 619 /**
 620  * twl_get_version - API to get TWL Si version.
 621  *
 622  * Api to get the TWL Si version from IDCODE value.
 623  */
 624 int twl_get_version(void)
 625 {
 626         return TWL_SIL_REV(twl_idcode);
 627 }
 628 EXPORT_SYMBOL_GPL(twl_get_version);
 629
 630 static struct device *
 631 add_numbered_child(unsigned chip, const char *name, int num,
 632                 void *pdata, unsigned pdata_len,
 633                 bool can_wakeup, int irq0, int irq1)
 634 {
 635         struct platform_device  *pdev;
 636         struct twl_client       *twl = &twl_modules[chip];
 637         int                     status;
 638
 639         pdev = platform_device_alloc(name, num);
 640         if (!pdev) {
 641                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 642                 status = -ENOMEM;
 643                 goto err;
 644         }
 645
 646         pdev->dev.parent = &twl->client->dev;
 647
 648         if (pdata) {
 649                 status = platform_device_add_data(pdev, pdata, pdata_len);
 650                 if (status < 0) {
 651                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 652                         goto err;
 653                 }
 654         }
 655
 656         if (irq0) {
 657                 struct resource r[2] = {
 658                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 659                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 660                 };
 661
 662                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 663                 if (status < 0) {
 664                         dev_dbg(&pdev->dev, "can't add irqs\n");
 665                         goto err;
 666                 }
 667         }
 668
 669         status = platform_device_add(pdev);
 670         if (status == 0)
 671                 device_init_wakeup(&pdev->dev, can_wakeup);
 672
 673 err:
 674         if (status < 0) {
 675                 platform_device_put(pdev);
 676                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 677                 return ERR_PTR(status);
 678         }
 679         return &pdev->dev;
 680 }
 681
 682 static inline struct device *add_child(unsigned chip, const char *name,
 683                 void *pdata, unsigned pdata_len,
 684                 bool can_wakeup, int irq0, int irq1)
 685 {
 686         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 687                 can_wakeup, irq0, irq1);
 688 }
 689
 690 static struct device *
 691 add_regulator_linked(int num, struct regulator_init_data *pdata,
 692                 struct regulator_consumer_supply *consumers,
 693                 unsigned num_consumers, unsigned long features)
 694 {
 695         unsigned sub_chip_id;
 696         struct twl_regulator_driver_data drv_data;
 697
 698         /* regulator framework demands init_data ... */
 699         if (!pdata)
 700                 return NULL;
 701
 702         if (consumers) {
 703                 pdata->consumer_supplies = consumers;
 704                 pdata->num_consumer_supplies = num_consumers;
 705         }
 706
 707         if (pdata->driver_data) {
 708                 /* If we have existing drv_data, just add the flags */
 709                 struct twl_regulator_driver_data *tmp;
 710                 tmp = pdata->driver_data;
 711                 tmp->features |= features;
 712         } else {
 713                 /* add new driver data struct, used only during init */
 714                 drv_data.features = features;
 715                 drv_data.set_voltage = NULL;
 716                 drv_data.get_voltage = NULL;
 717                 drv_data.data = NULL;
 718                 pdata->driver_data = &drv_data;
 719         }
 720
 721         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 722         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 723         return add_numbered_child(sub_chip_id, "twl_reg", num,
 724                 pdata, sizeof(*pdata), false, 0, 0);
 725 }
 726
 727 static struct device *
 728 add_regulator(int num, struct regulator_init_data *pdata,
 729                 unsigned long features)
 730 {
 731         return add_regulator_linked(num, pdata, NULL, 0, features);
 732 }
 733
 734 /*
 735  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 736  * for the PIH, and the next are for the PWR_INT SIH, since
 737  * that's how twl_init_irq() sets things up.
 738  */
 739
 740 static int
 741 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 742 {
 743         struct device   *child;
 744         unsigned sub_chip_id;
 745
 746         if (twl_has_gpio() && pdata->gpio) {
 747                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 748                                 pdata->gpio, sizeof(*pdata->gpio),
 749                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 750                 if (IS_ERR(child))
 751                         return PTR_ERR(child);
 752         }
 753
 754         if (twl_has_keypad() && pdata->keypad) {
 755                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 756                                 pdata->keypad, sizeof(*pdata->keypad),
 757                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 758                 if (IS_ERR(child))
 759                         return PTR_ERR(child);
 760         }
 761
 762         if (twl_has_madc() && pdata->madc) {
 763                 child = add_child(2, "twl4030_madc",
 764                                 pdata->madc, sizeof(*pdata->madc),
 765                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 766                 if (IS_ERR(child))
 767                         return PTR_ERR(child);
 768         }
 769
 770         if (twl_has_rtc()) {
 771                 /*
 772                  * REVISIT platform_data here currently might expose the
 773                  * "msecure" line ... but for now we just expect board
 774                  * setup to tell the chip "it's always ok to SET_TIME".
 775                  * Eventually, Linux might become more aware of such
 776                  * HW security concerns, and "least privilege".
 777                  */
 778                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 779                 child = add_child(sub_chip_id, "twl_rtc",
 780                                 NULL, 0,
 781                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 782                 if (IS_ERR(child))
 783                         return PTR_ERR(child);
 784         }
 785
 786         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 787
 788                 static struct regulator_consumer_supply usb1v5 = {
 789                         .supply =       "usb1v5",
 790                 };
 791                 static struct regulator_consumer_supply usb1v8 = {
 792                         .supply =       "usb1v8",
 793                 };
 794                 static struct regulator_consumer_supply usb3v1[] = {
 795                         { .supply =     "usb3v1" },
 796                         { .supply =     "bci3v1" },
 797                 };
 798
 799         /* First add the regulators so that they can be used by transceiver */
 800                 if (twl_has_regulator()) {
 801                         /* this is a template that gets copied */
 802                         struct regulator_init_data usb_fixed = {
 803                                 .constraints.valid_modes_mask =
 804                                         REGULATOR_MODE_NORMAL
 805                                         | REGULATOR_MODE_STANDBY,
 806                                 .constraints.valid_ops_mask =
 807                                         REGULATOR_CHANGE_MODE
 808                                         | REGULATOR_CHANGE_STATUS,
 809                         };
 810
 811                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 812                                                       &usb_fixed, &usb1v5, 1,
 813                                                       features);
 814                         if (IS_ERR(child))
 815                                 return PTR_ERR(child);
 816
 817                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 818                                                       &usb_fixed, &usb1v8, 1,
 819                                                       features);
 820                         if (IS_ERR(child))
 821                                 return PTR_ERR(child);
 822
 823                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 824                                                       &usb_fixed, usb3v1, 2,
 825                                                       features);
 826                         if (IS_ERR(child))
 827                                 return PTR_ERR(child);
 828
 829                 }
 830
 831                 child = add_child(0, "twl4030_usb",
 832                                 pdata->usb, sizeof(*pdata->usb),
 833                                 true,
 834                                 /* irq0 = USB_PRES, irq1 = USB */
 835                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 836                                 pdata->irq_base + USB_INTR_OFFSET);
 837
 838                 if (IS_ERR(child))
 839                         return PTR_ERR(child);
 840
 841                 /* we need to connect regulators to this transceiver */
 842                 if (twl_has_regulator() && child) {
 843                         usb1v5.dev = child;
 844                         usb1v8.dev = child;
 845                         usb3v1[0].dev = child;
 846                 }
 847         }
 848         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 849
 850                 static struct regulator_consumer_supply usb3v3;
 851                 int regulator;
 852
 853                 if (twl_has_regulator()) {
 854                         /* this is a template that gets copied */
 855                         struct regulator_init_data usb_fixed = {
 856                                 .constraints.valid_modes_mask =
 857                                         REGULATOR_MODE_NORMAL
 858                                         | REGULATOR_MODE_STANDBY,
 859                                 .constraints.valid_ops_mask =
 860                                         REGULATOR_CHANGE_MODE
 861                                         | REGULATOR_CHANGE_STATUS,
 862                         };
 863
 864                         if (features & TWL6025_SUBCLASS) {
 865                                 usb3v3.supply = "ldousb";
 866                                 regulator = TWL6025_REG_LDOUSB;
 867                         } else {
 868                                 usb3v3.supply = "vusb";
 869                                 regulator = TWL6030_REG_VUSB;
 870                         }
 871                         child = add_regulator_linked(regulator, &usb_fixed,
 872                                                         &usb3v3, 1,
 873                                                         features);
 874                         if (IS_ERR(child))
 875                                 return PTR_ERR(child);
 876                 }
 877
 878                 pdata->usb->features = features;
 879
 880                 child = add_child(0, "twl6030_usb",
 881                         pdata->usb, sizeof(*pdata->usb),
 882                         true,
 883                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 884                         pdata->irq_base + USBOTG_INTR_OFFSET,
 885                         pdata->irq_base + USB_PRES_INTR_OFFSET);
 886
 887                 if (IS_ERR(child))
 888                         return PTR_ERR(child);
 889                 /* we need to connect regulators to this transceiver */
 890                 if (twl_has_regulator() && child)
 891                         usb3v3.dev = child;
 892         } else if (twl_has_regulator() && twl_class_is_6030()) {
 893                 if (features & TWL6025_SUBCLASS)
 894                         child = add_regulator(TWL6025_REG_LDOUSB,
 895                                                 pdata->ldousb, features);
 896                 else
 897                         child = add_regulator(TWL6030_REG_VUSB,
 898                                                 pdata->vusb, features);
 899
 900                         if (IS_ERR(child))
 901                                         return PTR_ERR(child);
 902         }
 903
 904         if (twl_has_watchdog() && twl_class_is_4030()) {
 905                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 906                 if (IS_ERR(child))
 907                         return PTR_ERR(child);
 908         }
 909
 910         if (twl_has_pwrbutton() && twl_class_is_4030()) {
 911                 child = add_child(1, "twl4030_pwrbutton",
 912                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 913                 if (IS_ERR(child))
 914                         return PTR_ERR(child);
 915         }
 916
 917         if (twl_has_codec() && pdata->audio && twl_class_is_4030()) {
 918                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 919                 child = add_child(sub_chip_id, "twl4030-audio",
 920                                 pdata->audio, sizeof(*pdata->audio),
 921                                 false, 0, 0);
 922                 if (IS_ERR(child))
 923                         return PTR_ERR(child);
 924         }
 925
 926         if (twl_has_codec() && pdata->audio && twl_class_is_6030()) {
 927                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 928                 child = add_child(sub_chip_id, "twl6040",
 929                                 pdata->audio, sizeof(*pdata->audio),
 930                                 false, 0, 0);
 931                 if (IS_ERR(child))
 932                         return PTR_ERR(child);
 933         }
 934
 935         /* twl4030 regulators */
 936         if (twl_has_regulator() && twl_class_is_4030()) {
 937                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1,
 938                                         features);
 939                 if (IS_ERR(child))
 940                         return PTR_ERR(child);
 941
 942                 child = add_regulator(TWL4030_REG_VIO, pdata->vio,
 943                                         features);
 944                 if (IS_ERR(child))
 945                         return PTR_ERR(child);
 946
 947                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1,
 948                                         features);
 949                 if (IS_ERR(child))
 950                         return PTR_ERR(child);
 951
 952                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2,
 953                                         features);
 954                 if (IS_ERR(child))
 955                         return PTR_ERR(child);
 956
 957                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1,
 958                                         features);
 959                 if (IS_ERR(child))
 960                         return PTR_ERR(child);
 961
 962                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac,
 963                                         features);
 964                 if (IS_ERR(child))
 965                         return PTR_ERR(child);
 966
 967                 child = add_regulator((features & TWL4030_VAUX2)
 968                                         ? TWL4030_REG_VAUX2_4030
 969                                         : TWL4030_REG_VAUX2,
 970                                 pdata->vaux2, features);
 971                 if (IS_ERR(child))
 972                         return PTR_ERR(child);
 973
 974                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1,
 975                                         features);
 976                 if (IS_ERR(child))
 977                         return PTR_ERR(child);
 978
 979                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2,
 980                                         features);
 981                 if (IS_ERR(child))
 982                         return PTR_ERR(child);
 983
 984                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig,
 985                                         features);
 986                 if (IS_ERR(child))
 987                         return PTR_ERR(child);
 988         }
 989
 990         /* maybe add LDOs that are omitted on cost-reduced parts */
 991         if (twl_has_regulator() && !(features & TPS_SUBSET)
 992           && twl_class_is_4030()) {
 993                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2,
 994                                         features);
 995                 if (IS_ERR(child))
 996                         return PTR_ERR(child);
 997
 998                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2,
 999                                         features);
1000                 if (IS_ERR(child))
1001                         return PTR_ERR(child);
1002
1003                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim,
1004                                         features);
1005                 if (IS_ERR(child))
1006                         return PTR_ERR(child);
1007
1008                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1,
1009                                         features);
1010                 if (IS_ERR(child))
1011                         return PTR_ERR(child);
1012
1013                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3,
1014                                         features);
1015                 if (IS_ERR(child))
1016                         return PTR_ERR(child);
1017
1018                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4,
1019                                         features);
1020                 if (IS_ERR(child))
1021                         return PTR_ERR(child);
1022         }
1023
1024         /* twl6030 regulators */
1025         if (twl_has_regulator() && twl_class_is_6030() &&
1026                         !(features & TWL6025_SUBCLASS)) {
1027                 child = add_regulator(TWL6030_REG_VDD1, pdata->vdd1,
1028                                         features);
1029                 if (IS_ERR(child))
1030                         return PTR_ERR(child);
1031
1032                 child = add_regulator(TWL6030_REG_VDD2, pdata->vdd2,
1033                                         features);
1034                 if (IS_ERR(child))
1035                         return PTR_ERR(child);
1036
1037                 child = add_regulator(TWL6030_REG_VDD3, pdata->vdd3,
1038                                         features);
1039                 if (IS_ERR(child))
1040                         return PTR_ERR(child);
1041
1042                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc,
1043                                         features);
1044                 if (IS_ERR(child))
1045                         return PTR_ERR(child);
1046
1047                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp,
1048                                         features);
1049                 if (IS_ERR(child))
1050                         return PTR_ERR(child);
1051
1052                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim,
1053                                         features);
1054                 if (IS_ERR(child))
1055                         return PTR_ERR(child);
1056
1057                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio,
1058                                         features);
1059                 if (IS_ERR(child))
1060                         return PTR_ERR(child);
1061
1062                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac,
1063                                         features);
1064                 if (IS_ERR(child))
1065                         return PTR_ERR(child);
1066
1067                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1,
1068                                         features);
1069                 if (IS_ERR(child))
1070                         return PTR_ERR(child);
1071
1072                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2,
1073                                         features);
1074                 if (IS_ERR(child))
1075                         return PTR_ERR(child);
1076
1077                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3,
1078                                         features);
1079                 if (IS_ERR(child))
1080                         return PTR_ERR(child);
1081
1082                 child = add_regulator(TWL6030_REG_CLK32KG, pdata->clk32kg,
1083                                         features);
1084                 if (IS_ERR(child))
1085                         return PTR_ERR(child);
1086         }
1087
1088         /* 6030 and 6025 share this regulator */
1089         if (twl_has_regulator() && twl_class_is_6030()) {
1090                 child = add_regulator(TWL6030_REG_VANA, pdata->vana,
1091                                         features);
1092                 if (IS_ERR(child))
1093                         return PTR_ERR(child);
1094         }
1095
1096         /* twl6025 regulators */
1097         if (twl_has_regulator() && twl_class_is_6030() &&
1098                         (features & TWL6025_SUBCLASS)) {
1099                 child = add_regulator(TWL6025_REG_LDO5, pdata->ldo5,
1100                                         features);
1101                 if (IS_ERR(child))
1102                         return PTR_ERR(child);
1103
1104                 child = add_regulator(TWL6025_REG_LDO1, pdata->ldo1,
1105                                         features);
1106                 if (IS_ERR(child))
1107                         return PTR_ERR(child);
1108
1109                 child = add_regulator(TWL6025_REG_LDO7, pdata->ldo7,
1110                                         features);
1111                 if (IS_ERR(child))
1112                         return PTR_ERR(child);
1113
1114                 child = add_regulator(TWL6025_REG_LDO6, pdata->ldo6,
1115                                         features);
1116                 if (IS_ERR(child))
1117                         return PTR_ERR(child);
1118
1119                 child = add_regulator(TWL6025_REG_LDOLN, pdata->ldoln,
1120                                         features);
1121                 if (IS_ERR(child))
1122                         return PTR_ERR(child);
1123
1124                 child = add_regulator(TWL6025_REG_LDO2, pdata->ldo2,
1125                                         features);
1126                 if (IS_ERR(child))
1127                         return PTR_ERR(child);
1128
1129                 child = add_regulator(TWL6025_REG_LDO4, pdata->ldo4,
1130                                         features);
1131                 if (IS_ERR(child))
1132                         return PTR_ERR(child);
1133
1134                 child = add_regulator(TWL6025_REG_LDO3, pdata->ldo3,
1135                                         features);
1136                 if (IS_ERR(child))
1137                         return PTR_ERR(child);
1138
1139                 child = add_regulator(TWL6025_REG_SMPS3, pdata->smps3,
1140                                         features);
1141                 if (IS_ERR(child))
1142                         return PTR_ERR(child);
1143
1144                 child = add_regulator(TWL6025_REG_SMPS4, pdata->smps4,
1145                                         features);
1146                 if (IS_ERR(child))
1147                         return PTR_ERR(child);
1148
1149                 child = add_regulator(TWL6025_REG_VIO, pdata->vio6025,
1150                                         features);
1151                 if (IS_ERR(child))
1152                         return PTR_ERR(child);
1153
1154         }
1155
1156         if (twl_has_bci() && pdata->bci &&
1157                         !(features & (TPS_SUBSET | TWL5031))) {
1158                 child = add_child(3, "twl4030_bci",
1159                                 pdata->bci, sizeof(*pdata->bci), false,
1160                                 /* irq0 = CHG_PRES, irq1 = BCI */
1161                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
1162                                 pdata->irq_base + BCI_INTR_OFFSET);
1163                 if (IS_ERR(child))
1164                         return PTR_ERR(child);
1165         }
1166
1167         return 0;
1168 }
1169
1170 /*----------------------------------------------------------------------*/
1171
1172 /*
1173  * These three functions initialize the on-chip clock framework,
1174  * letting it generate the right frequencies for USB, MADC, and
1175  * other purposes.
1176  */
1177 static inline int __init protect_pm_master(void)
1178 {
1179         int e = 0;
1180
1181         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
1182                         TWL4030_PM_MASTER_PROTECT_KEY);
1183         return e;
1184 }
1185
1186 static inline int __init unprotect_pm_master(void)
1187 {
1188         int e = 0;
1189
1190         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1191                         TWL4030_PM_MASTER_KEY_CFG1,
1192                         TWL4030_PM_MASTER_PROTECT_KEY);
1193         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
1194                         TWL4030_PM_MASTER_KEY_CFG2,
1195                         TWL4030_PM_MASTER_PROTECT_KEY);
1196
1197         return e;
1198 }
1199
1200 static void clocks_init(struct device *dev,
1201                         struct twl4030_clock_init_data *clock)
1202 {
1203         int e = 0;
1204         struct clk *osc;
1205         u32 rate;
1206         u8 ctrl = HFCLK_FREQ_26_MHZ;
1207
1208 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
1209         if (cpu_is_omap2430())
1210                 osc = clk_get(dev, "osc_ck");
1211         else
1212                 osc = clk_get(dev, "osc_sys_ck");
1213
1214         if (IS_ERR(osc)) {
1215                 printk(KERN_WARNING "Skipping twl internal clock init and "
1216                                 "using bootloader value (unknown osc rate)\n");
1217                 return;
1218         }
1219
1220         rate = clk_get_rate(osc);
1221         clk_put(osc);
1222
1223 #else
1224         /* REVISIT for non-OMAP systems, pass the clock rate from
1225          * board init code, using platform_data.
1226          */
1227         osc = ERR_PTR(-EIO);
1228
1229         printk(KERN_WARNING "Skipping twl internal clock init and "
1230                "using bootloader value (unknown osc rate)\n");
1231
1232         return;
1233 #endif
1234
1235         switch (rate) {
1236         case 19200000:
1237                 ctrl = HFCLK_FREQ_19p2_MHZ;
1238                 break;
1239         case 26000000:
1240                 ctrl = HFCLK_FREQ_26_MHZ;
1241                 break;
1242         case 38400000:
1243                 ctrl = HFCLK_FREQ_38p4_MHZ;
1244                 break;
1245         }
1246
1247         ctrl |= HIGH_PERF_SQ;
1248         if (clock && clock->ck32k_lowpwr_enable)
1249                 ctrl |= CK32K_LOWPWR_EN;
1250
1251         e |= unprotect_pm_master();
1252         /* effect->MADC+USB ck en */
1253         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
1254         e |= protect_pm_master();
1255
1256         if (e < 0)
1257                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
1258 }
1259
1260 /*----------------------------------------------------------------------*/
1261
1262 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1263 int twl4030_exit_irq(void);
1264 int twl4030_init_chip_irq(const char *chip);
1265 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
1266 int twl6030_exit_irq(void);
1267
1268 static int twl_remove(struct i2c_client *client)
1269 {
1270         unsigned i;
1271         int status;
1272
1273         if (twl_class_is_4030())
1274                 status = twl4030_exit_irq();
1275         else
1276                 status = twl6030_exit_irq();
1277
1278         if (status < 0)
1279                 return status;
1280
1281         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1282                 struct twl_client       *twl = &twl_modules[i];
1283
1284                 if (twl->client && twl->client != client)
1285                         i2c_unregister_device(twl->client);
1286                 twl_modules[i].client = NULL;
1287         }
1288         inuse = false;
1289         return 0;
1290 }
1291
1292 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1293 static int __devinit
1294 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1295 {
1296         int                             status;
1297         unsigned                        i;
1298         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1299         u8 temp;
1300         int ret = 0;
1301
1302         if (!pdata) {
1303                 dev_dbg(&client->dev, "no platform data?\n");
1304                 return -EINVAL;
1305         }
1306
1307         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1308                 dev_dbg(&client->dev, "can't talk I2C?\n");
1309                 return -EIO;
1310         }
1311
1312         if (inuse) {
1313                 dev_dbg(&client->dev, "driver is already in use\n");
1314                 return -EBUSY;
1315         }
1316
1317         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1318                 struct twl_client       *twl = &twl_modules[i];
1319
1320                 twl->address = client->addr + i;
1321                 if (i == 0)
1322                         twl->client = client;
1323                 else {
1324                         twl->client = i2c_new_dummy(client->adapter,
1325                                         twl->address);
1326                         if (!twl->client) {
1327                                 dev_err(&client->dev,
1328                                         "can't attach client %d\n", i);
1329                                 status = -ENOMEM;
1330                                 goto fail;
1331                         }
1332                 }
1333                 mutex_init(&twl->xfer_lock);
1334         }
1335         inuse = true;
1336         if ((id->driver_data) & TWL6030_CLASS) {
1337                 twl_id = TWL6030_CLASS_ID;
1338                 twl_map = &twl6030_map[0];
1339         } else {
1340                 twl_id = TWL4030_CLASS_ID;
1341                 twl_map = &twl4030_map[0];
1342         }
1343
1344         /* setup clock framework */
1345         clocks_init(&client->dev, pdata->clock);
1346
1347         /* read TWL IDCODE Register */
1348         if (twl_id == TWL4030_CLASS_ID) {
1349                 ret = twl_read_idcode_register();
1350                 WARN(ret < 0, "Error: reading twl_idcode register value\n");
1351         }
1352
1353         /* load power event scripts */
1354         if (twl_has_power() && pdata->power)
1355                 twl4030_power_init(pdata->power);
1356
1357         /* Maybe init the T2 Interrupt subsystem */
1358         if (client->irq
1359                         && pdata->irq_base
1360                         && pdata->irq_end > pdata->irq_base) {
1361                 if (twl_class_is_4030()) {
1362                         twl4030_init_chip_irq(id->name);
1363                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1364                         pdata->irq_end);
1365                 } else {
1366                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1367                         pdata->irq_end);
1368                 }
1369
1370                 if (status < 0)
1371                         goto fail;
1372         }
1373
1374         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1375          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1376          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1377          */
1378
1379         if (twl_class_is_4030()) {
1380                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1381                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1382                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1383                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1384         }
1385
1386         status = add_children(pdata, id->driver_data);
1387 fail:
1388         if (status < 0)
1389                 twl_remove(client);
1390         return status;
1391 }
1392
1393 static const struct i2c_device_id twl_ids[] = {
1394         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1395         { "twl5030", 0 },               /* T2 updated */
1396         { "twl5031", TWL5031 },         /* TWL5030 updated */
1397         { "tps65950", 0 },              /* catalog version of twl5030 */
1398         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1399         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1400         { "tps65921", TPS_SUBSET },     /* fewer LDOs; no codec, no LED
1401                                            and vibrator. Charger in USB module*/
1402         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1403         { "twl6025", TWL6030_CLASS | TWL6025_SUBCLASS }, /* "Phoenix lite" */
1404         { /* end of list */ },
1405 };
1406 MODULE_DEVICE_TABLE(i2c, twl_ids);
1407
1408 /* One Client Driver , 4 Clients */
1409 static struct i2c_driver twl_driver = {
1410         .driver.name    = DRIVER_NAME,
1411         .id_table       = twl_ids,
1412         .probe          = twl_probe,
1413         .remove         = twl_remove,
1414 };
1415
1416 static int __init twl_init(void)
1417 {
1418         return i2c_add_driver(&twl_driver);
1419 }
1420 subsys_initcall(twl_init);
1421
1422 static void __exit twl_exit(void)
1423 {
1424         i2c_del_driver(&twl_driver);
1425 }
1426 module_exit(twl_exit);
1427
1428 MODULE_AUTHOR("Texas Instruments, Inc.");
1429 MODULE_DESCRIPTION("I2C Core interface for TWL");
1430 MODULE_LICENSE("GPL");