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/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_TWL4030_BCI_BATTERY) || \
  62         defined(CONFIG_TWL4030_BCI_BATTERY_MODULE)
  63 #define twl_has_bci()           true
  64 #else
  65 #define twl_has_bci()           false
  66 #endif
  67
  68 #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  69 #define twl_has_keypad()        true
  70 #else
  71 #define twl_has_keypad()        false
  72 #endif
  73
  74 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  75 #define twl_has_gpio()  true
  76 #else
  77 #define twl_has_gpio()  false
  78 #endif
  79
  80 #if defined(CONFIG_REGULATOR_TWL4030) \
  81         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  82 #define twl_has_regulator()     true
  83 #else
  84 #define twl_has_regulator()     false
  85 #endif
  86
  87 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  88 #define twl_has_madc()  true
  89 #else
  90 #define twl_has_madc()  false
  91 #endif
  92
  93 #ifdef CONFIG_TWL4030_POWER
  94 #define twl_has_power()        true
  95 #else
  96 #define twl_has_power()        false
  97 #endif
  98
  99 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
 100 #define twl_has_rtc()   true
 101 #else
 102 #define twl_has_rtc()   false
 103 #endif
 104
 105 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE)
 106 #define twl_has_usb()   true
 107 #else
 108 #define twl_has_usb()   false
 109 #endif
 110
 111 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 112         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 113 #define twl_has_watchdog()        true
 114 #else
 115 #define twl_has_watchdog()        false
 116 #endif
 117
 118 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE)
 119 #define twl_has_codec() true
 120 #else
 121 #define twl_has_codec() 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_PWBUTTON_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
 208 /* Few power values */
 209 #define R_CFG_BOOT                      0x05
 210 #define R_PROTECT_KEY                   0x0E
 211
 212 /* access control values for R_PROTECT_KEY */
 213 #define KEY_UNLOCK1                     0xce
 214 #define KEY_UNLOCK2                     0xec
 215 #define KEY_LOCK                        0x00
 216
 217 /* some fields in R_CFG_BOOT */
 218 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 219 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 220 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 221 #define HIGH_PERF_SQ                    (1 << 3)
 222 #define CK32K_LOWPWR_EN                 (1 << 7)
 223
 224
 225 /* chip-specific feature flags, for i2c_device_id.driver_data */
 226 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 227 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 228 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 229 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 230
 231 /*----------------------------------------------------------------------*/
 232
 233 /* is driver active, bound to a chip? */
 234 static bool inuse;
 235
 236 static unsigned int twl_id;
 237 unsigned int twl_rev(void)
 238 {
 239         return twl_id;
 240 }
 241 EXPORT_SYMBOL(twl_rev);
 242
 243 /* Structure for each TWL4030/TWL6030 Slave */
 244 struct twl_client {
 245         struct i2c_client *client;
 246         u8 address;
 247
 248         /* max numb of i2c_msg required is for read =2 */
 249         struct i2c_msg xfer_msg[2];
 250
 251         /* To lock access to xfer_msg */
 252         struct mutex xfer_lock;
 253 };
 254
 255 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 256
 257
 258 /* mapping the module id to slave id and base address */
 259 struct twl_mapping {
 260         unsigned char sid;      /* Slave ID */
 261         unsigned char base;     /* base address */
 262 };
 263 struct twl_mapping *twl_map;
 264
 265 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 266         /*
 267          * NOTE:  don't change this table without updating the
 268          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 269          * so they continue to match the order in this table.
 270          */
 271
 272         { 0, TWL4030_BASEADD_USB },
 273
 274         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 275         { 1, TWL4030_BASEADD_GPIO },
 276         { 1, TWL4030_BASEADD_INTBR },
 277         { 1, TWL4030_BASEADD_PIH },
 278         { 1, TWL4030_BASEADD_TEST },
 279
 280         { 2, TWL4030_BASEADD_KEYPAD },
 281         { 2, TWL4030_BASEADD_MADC },
 282         { 2, TWL4030_BASEADD_INTERRUPTS },
 283         { 2, TWL4030_BASEADD_LED },
 284         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 285         { 2, TWL4030_BASEADD_PRECHARGE },
 286         { 2, TWL4030_BASEADD_PWM0 },
 287         { 2, TWL4030_BASEADD_PWM1 },
 288         { 2, TWL4030_BASEADD_PWMA },
 289         { 2, TWL4030_BASEADD_PWMB },
 290         { 2, TWL5031_BASEADD_ACCESSORY },
 291         { 2, TWL5031_BASEADD_INTERRUPTS },
 292
 293         { 3, TWL4030_BASEADD_BACKUP },
 294         { 3, TWL4030_BASEADD_INT },
 295         { 3, TWL4030_BASEADD_PM_MASTER },
 296         { 3, TWL4030_BASEADD_PM_RECEIVER },
 297         { 3, TWL4030_BASEADD_RTC },
 298         { 3, TWL4030_BASEADD_SECURED_REG },
 299 };
 300
 301 static struct twl_mapping twl6030_map[] = {
 302         /*
 303          * NOTE:  don't change this table without updating the
 304          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 305          * so they continue to match the order in this table.
 306          */
 307         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 308         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 309         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 310         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 311         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 312
 313         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 314         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 315         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 316         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 317         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 318
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 320         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 321         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 322         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 323         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 324
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 326         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 327         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 328         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 329         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 330
 331         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 332         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 333 };
 334
 335 /*----------------------------------------------------------------------*/
 336
 337 /* Exported Functions */
 338
 339 /**
 340  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 341  * @mod_no: module number
 342  * @value: an array of num_bytes+1 containing data to write
 343  * @reg: register address (just offset will do)
 344  * @num_bytes: number of bytes to transfer
 345  *
 346  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 347  * valid data starts at Offset 1.
 348  *
 349  * Returns the result of operation - 0 is success
 350  */
 351 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 352 {
 353         int ret;
 354         int sid;
 355         struct twl_client *twl;
 356         struct i2c_msg *msg;
 357
 358         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 359                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 360                 return -EPERM;
 361         }
 362         sid = twl_map[mod_no].sid;
 363         twl = &twl_modules[sid];
 364
 365         if (unlikely(!inuse)) {
 366                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 367                 return -EPERM;
 368         }
 369         mutex_lock(&twl->xfer_lock);
 370         /*
 371          * [MSG1]: fill the register address data
 372          * fill the data Tx buffer
 373          */
 374         msg = &twl->xfer_msg[0];
 375         msg->addr = twl->address;
 376         msg->len = num_bytes + 1;
 377         msg->flags = 0;
 378         msg->buf = value;
 379         /* over write the first byte of buffer with the register address */
 380         *value = twl_map[mod_no].base + reg;
 381         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 382         mutex_unlock(&twl->xfer_lock);
 383
 384         /* i2c_transfer returns number of messages transferred */
 385         if (ret != 1) {
 386                 pr_err("%s: i2c_write failed to transfer all messages\n",
 387                         DRIVER_NAME);
 388                 if (ret < 0)
 389                         return ret;
 390                 else
 391                         return -EIO;
 392         } else {
 393                 return 0;
 394         }
 395 }
 396 EXPORT_SYMBOL(twl_i2c_write);
 397
 398 /**
 399  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 400  * @mod_no: module number
 401  * @value: an array of num_bytes containing data to be read
 402  * @reg: register address (just offset will do)
 403  * @num_bytes: number of bytes to transfer
 404  *
 405  * Returns result of operation - num_bytes is success else failure.
 406  */
 407 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 408 {
 409         int ret;
 410         u8 val;
 411         int sid;
 412         struct twl_client *twl;
 413         struct i2c_msg *msg;
 414
 415         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 416                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 417                 return -EPERM;
 418         }
 419         sid = twl_map[mod_no].sid;
 420         twl = &twl_modules[sid];
 421
 422         if (unlikely(!inuse)) {
 423                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 424                 return -EPERM;
 425         }
 426         mutex_lock(&twl->xfer_lock);
 427         /* [MSG1] fill the register address data */
 428         msg = &twl->xfer_msg[0];
 429         msg->addr = twl->address;
 430         msg->len = 1;
 431         msg->flags = 0; /* Read the register value */
 432         val = twl_map[mod_no].base + reg;
 433         msg->buf = &val;
 434         /* [MSG2] fill the data rx buffer */
 435         msg = &twl->xfer_msg[1];
 436         msg->addr = twl->address;
 437         msg->flags = I2C_M_RD;  /* Read the register value */
 438         msg->len = num_bytes;   /* only n bytes */
 439         msg->buf = value;
 440         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 441         mutex_unlock(&twl->xfer_lock);
 442
 443         /* i2c_transfer returns number of messages transferred */
 444         if (ret != 2) {
 445                 pr_err("%s: i2c_read failed to transfer all messages\n",
 446                         DRIVER_NAME);
 447                 if (ret < 0)
 448                         return ret;
 449                 else
 450                         return -EIO;
 451         } else {
 452                 return 0;
 453         }
 454 }
 455 EXPORT_SYMBOL(twl_i2c_read);
 456
 457 /**
 458  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 459  * @mod_no: module number
 460  * @value: the value to be written 8 bit
 461  * @reg: register address (just offset will do)
 462  *
 463  * Returns result of operation - 0 is success
 464  */
 465 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 466 {
 467
 468         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 469         u8 temp_buffer[2] = { 0 };
 470         /* offset 1 contains the data */
 471         temp_buffer[1] = value;
 472         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 473 }
 474 EXPORT_SYMBOL(twl_i2c_write_u8);
 475
 476 /**
 477  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 478  * @mod_no: module number
 479  * @value: the value read 8 bit
 480  * @reg: register address (just offset will do)
 481  *
 482  * Returns result of operation - 0 is success
 483  */
 484 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 485 {
 486         return twl_i2c_read(mod_no, value, reg, 1);
 487 }
 488 EXPORT_SYMBOL(twl_i2c_read_u8);
 489
 490 /*----------------------------------------------------------------------*/
 491
 492 static struct device *
 493 add_numbered_child(unsigned chip, const char *name, int num,
 494                 void *pdata, unsigned pdata_len,
 495                 bool can_wakeup, int irq0, int irq1)
 496 {
 497         struct platform_device  *pdev;
 498         struct twl_client       *twl = &twl_modules[chip];
 499         int                     status;
 500
 501         pdev = platform_device_alloc(name, num);
 502         if (!pdev) {
 503                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 504                 status = -ENOMEM;
 505                 goto err;
 506         }
 507
 508         device_init_wakeup(&pdev->dev, can_wakeup);
 509         pdev->dev.parent = &twl->client->dev;
 510
 511         if (pdata) {
 512                 status = platform_device_add_data(pdev, pdata, pdata_len);
 513                 if (status < 0) {
 514                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 515                         goto err;
 516                 }
 517         }
 518
 519         if (irq0) {
 520                 struct resource r[2] = {
 521                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 522                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 523                 };
 524
 525                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 526                 if (status < 0) {
 527                         dev_dbg(&pdev->dev, "can't add irqs\n");
 528                         goto err;
 529                 }
 530         }
 531
 532         status = platform_device_add(pdev);
 533
 534 err:
 535         if (status < 0) {
 536                 platform_device_put(pdev);
 537                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 538                 return ERR_PTR(status);
 539         }
 540         return &pdev->dev;
 541 }
 542
 543 static inline struct device *add_child(unsigned chip, const char *name,
 544                 void *pdata, unsigned pdata_len,
 545                 bool can_wakeup, int irq0, int irq1)
 546 {
 547         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 548                 can_wakeup, irq0, irq1);
 549 }
 550
 551 static struct device *
 552 add_regulator_linked(int num, struct regulator_init_data *pdata,
 553                 struct regulator_consumer_supply *consumers,
 554                 unsigned num_consumers)
 555 {
 556         unsigned sub_chip_id;
 557         /* regulator framework demands init_data ... */
 558         if (!pdata)
 559                 return NULL;
 560
 561         if (consumers) {
 562                 pdata->consumer_supplies = consumers;
 563                 pdata->num_consumer_supplies = num_consumers;
 564         }
 565
 566         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 567         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 568         return add_numbered_child(sub_chip_id, "twl_reg", num,
 569                 pdata, sizeof(*pdata), false, 0, 0);
 570 }
 571
 572 static struct device *
 573 add_regulator(int num, struct regulator_init_data *pdata)
 574 {
 575         return add_regulator_linked(num, pdata, NULL, 0);
 576 }
 577
 578 /*
 579  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 580  * for the PIH, and the next are for the PWR_INT SIH, since
 581  * that's how twl_init_irq() sets things up.
 582  */
 583
 584 static int
 585 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 586 {
 587         struct device   *child;
 588         unsigned sub_chip_id;
 589
 590         if (twl_has_bci() && pdata->bci &&
 591             !(features & (TPS_SUBSET | TWL5031))) {
 592                 child = add_child(3, "twl4030_bci",
 593                                 pdata->bci, sizeof(*pdata->bci),
 594                                 false,
 595                                 /* irq0 = CHG_PRES, irq1 = BCI */
 596                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
 597                                 pdata->irq_base + BCI_INTR_OFFSET);
 598                 if (IS_ERR(child))
 599                         return PTR_ERR(child);
 600         }
 601
 602         if (twl_has_gpio() && pdata->gpio) {
 603                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 604                                 pdata->gpio, sizeof(*pdata->gpio),
 605                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 606                 if (IS_ERR(child))
 607                         return PTR_ERR(child);
 608         }
 609
 610         if (twl_has_keypad() && pdata->keypad) {
 611                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 612                                 pdata->keypad, sizeof(*pdata->keypad),
 613                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 614                 if (IS_ERR(child))
 615                         return PTR_ERR(child);
 616         }
 617
 618         if (twl_has_madc() && pdata->madc) {
 619                 child = add_child(2, "twl4030_madc",
 620                                 pdata->madc, sizeof(*pdata->madc),
 621                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 622                 if (IS_ERR(child))
 623                         return PTR_ERR(child);
 624         }
 625
 626         if (twl_has_rtc()) {
 627                 /*
 628                  * REVISIT platform_data here currently might expose the
 629                  * "msecure" line ... but for now we just expect board
 630                  * setup to tell the chip "it's always ok to SET_TIME".
 631                  * Eventually, Linux might become more aware of such
 632                  * HW security concerns, and "least privilege".
 633                  */
 634                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 635                 child = add_child(sub_chip_id, "twl_rtc",
 636                                 NULL, 0,
 637                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 638                 if (IS_ERR(child))
 639                         return PTR_ERR(child);
 640         }
 641
 642         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 643
 644                 static struct regulator_consumer_supply usb1v5 = {
 645                         .supply =       "usb1v5",
 646                 };
 647                 static struct regulator_consumer_supply usb1v8 = {
 648                         .supply =       "usb1v8",
 649                 };
 650                 static struct regulator_consumer_supply usb3v1 = {
 651                         .supply =       "usb3v1",
 652                 };
 653
 654         /* First add the regulators so that they can be used by transceiver */
 655                 if (twl_has_regulator()) {
 656                         /* this is a template that gets copied */
 657                         struct regulator_init_data usb_fixed = {
 658                                 .constraints.valid_modes_mask =
 659                                         REGULATOR_MODE_NORMAL
 660                                         | REGULATOR_MODE_STANDBY,
 661                                 .constraints.valid_ops_mask =
 662                                         REGULATOR_CHANGE_MODE
 663                                         | REGULATOR_CHANGE_STATUS,
 664                         };
 665
 666                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 667                                                       &usb_fixed, &usb1v5, 1);
 668                         if (IS_ERR(child))
 669                                 return PTR_ERR(child);
 670
 671                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 672                                                       &usb_fixed, &usb1v8, 1);
 673                         if (IS_ERR(child))
 674                                 return PTR_ERR(child);
 675
 676                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 677                                                       &usb_fixed, &usb3v1, 1);
 678                         if (IS_ERR(child))
 679                                 return PTR_ERR(child);
 680
 681                 }
 682
 683                 child = add_child(0, "twl4030_usb",
 684                                 pdata->usb, sizeof(*pdata->usb),
 685                                 true,
 686                                 /* irq0 = USB_PRES, irq1 = USB */
 687                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 688                                 pdata->irq_base + USB_INTR_OFFSET);
 689
 690                 if (IS_ERR(child))
 691                         return PTR_ERR(child);
 692
 693                 /* we need to connect regulators to this transceiver */
 694                 if (twl_has_regulator() && child) {
 695                         usb1v5.dev = child;
 696                         usb1v8.dev = child;
 697                         usb3v1.dev = child;
 698                 }
 699         }
 700
 701         if (twl_has_watchdog()) {
 702                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 703                 if (IS_ERR(child))
 704                         return PTR_ERR(child);
 705         }
 706
 707         if (twl_has_pwrbutton()) {
 708                 child = add_child(1, "twl4030_pwrbutton",
 709                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 710                 if (IS_ERR(child))
 711                         return PTR_ERR(child);
 712         }
 713
 714         if (twl_has_codec() && pdata->codec) {
 715                 child = add_child(1, "twl4030_codec",
 716                                 pdata->codec, sizeof(*pdata->codec),
 717                                 false, 0, 0);
 718                 if (IS_ERR(child))
 719                         return PTR_ERR(child);
 720         }
 721
 722         /* twl4030 regulators */
 723         if (twl_has_regulator() && twl_class_is_4030()) {
 724                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 725                 if (IS_ERR(child))
 726                         return PTR_ERR(child);
 727
 728                 child = add_regulator(TWL4030_REG_VIO, pdata->vio);
 729                 if (IS_ERR(child))
 730                         return PTR_ERR(child);
 731
 732                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1);
 733                 if (IS_ERR(child))
 734                         return PTR_ERR(child);
 735
 736                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2);
 737                 if (IS_ERR(child))
 738                         return PTR_ERR(child);
 739
 740                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 741                 if (IS_ERR(child))
 742                         return PTR_ERR(child);
 743
 744                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 745                 if (IS_ERR(child))
 746                         return PTR_ERR(child);
 747
 748                 child = add_regulator((features & TWL4030_VAUX2)
 749                                         ? TWL4030_REG_VAUX2_4030
 750                                         : TWL4030_REG_VAUX2,
 751                                 pdata->vaux2);
 752                 if (IS_ERR(child))
 753                         return PTR_ERR(child);
 754
 755                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1);
 756                 if (IS_ERR(child))
 757                         return PTR_ERR(child);
 758
 759                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2);
 760                 if (IS_ERR(child))
 761                         return PTR_ERR(child);
 762
 763                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig);
 764                 if (IS_ERR(child))
 765                         return PTR_ERR(child);
 766         }
 767
 768         /* maybe add LDOs that are omitted on cost-reduced parts */
 769         if (twl_has_regulator() && !(features & TPS_SUBSET)
 770           && twl_class_is_4030()) {
 771                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 772                 if (IS_ERR(child))
 773                         return PTR_ERR(child);
 774
 775                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 776                 if (IS_ERR(child))
 777                         return PTR_ERR(child);
 778
 779                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 780                 if (IS_ERR(child))
 781                         return PTR_ERR(child);
 782
 783                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 784                 if (IS_ERR(child))
 785                         return PTR_ERR(child);
 786
 787                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 788                 if (IS_ERR(child))
 789                         return PTR_ERR(child);
 790
 791                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 792                 if (IS_ERR(child))
 793                         return PTR_ERR(child);
 794         }
 795
 796         /* twl6030 regulators */
 797         if (twl_has_regulator() && twl_class_is_6030()) {
 798                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc);
 799                 if (IS_ERR(child))
 800                         return PTR_ERR(child);
 801
 802                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp);
 803                 if (IS_ERR(child))
 804                         return PTR_ERR(child);
 805
 806                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim);
 807                 if (IS_ERR(child))
 808                         return PTR_ERR(child);
 809
 810                 child = add_regulator(TWL6030_REG_VANA, pdata->vana);
 811                 if (IS_ERR(child))
 812                         return PTR_ERR(child);
 813
 814                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio);
 815                 if (IS_ERR(child))
 816                         return PTR_ERR(child);
 817
 818                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac);
 819                 if (IS_ERR(child))
 820                         return PTR_ERR(child);
 821
 822                 child = add_regulator(TWL6030_REG_VUSB, pdata->vusb);
 823                 if (IS_ERR(child))
 824                         return PTR_ERR(child);
 825
 826                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1);
 827                 if (IS_ERR(child))
 828                         return PTR_ERR(child);
 829
 830                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2);
 831                 if (IS_ERR(child))
 832                         return PTR_ERR(child);
 833
 834                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3);
 835                 if (IS_ERR(child))
 836                         return PTR_ERR(child);
 837         }
 838
 839         return 0;
 840 }
 841
 842 /*----------------------------------------------------------------------*/
 843
 844 /*
 845  * These three functions initialize the on-chip clock framework,
 846  * letting it generate the right frequencies for USB, MADC, and
 847  * other purposes.
 848  */
 849 static inline int __init protect_pm_master(void)
 850 {
 851         int e = 0;
 852
 853         e = twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_LOCK,
 854                         R_PROTECT_KEY);
 855         return e;
 856 }
 857
 858 static inline int __init unprotect_pm_master(void)
 859 {
 860         int e = 0;
 861
 862         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK1,
 863                         R_PROTECT_KEY);
 864         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, KEY_UNLOCK2,
 865                         R_PROTECT_KEY);
 866         return e;
 867 }
 868
 869 static void clocks_init(struct device *dev,
 870                         struct twl4030_clock_init_data *clock)
 871 {
 872         int e = 0;
 873         struct clk *osc;
 874         u32 rate;
 875         u8 ctrl = HFCLK_FREQ_26_MHZ;
 876
 877 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 878         if (cpu_is_omap2430())
 879                 osc = clk_get(dev, "osc_ck");
 880         else
 881                 osc = clk_get(dev, "osc_sys_ck");
 882
 883         if (IS_ERR(osc)) {
 884                 printk(KERN_WARNING "Skipping twl internal clock init and "
 885                                 "using bootloader value (unknown osc rate)\n");
 886                 return;
 887         }
 888
 889         rate = clk_get_rate(osc);
 890         clk_put(osc);
 891
 892 #else
 893         /* REVISIT for non-OMAP systems, pass the clock rate from
 894          * board init code, using platform_data.
 895          */
 896         osc = ERR_PTR(-EIO);
 897
 898         printk(KERN_WARNING "Skipping twl internal clock init and "
 899                "using bootloader value (unknown osc rate)\n");
 900
 901         return;
 902 #endif
 903
 904         switch (rate) {
 905         case 19200000:
 906                 ctrl = HFCLK_FREQ_19p2_MHZ;
 907                 break;
 908         case 26000000:
 909                 ctrl = HFCLK_FREQ_26_MHZ;
 910                 break;
 911         case 38400000:
 912                 ctrl = HFCLK_FREQ_38p4_MHZ;
 913                 break;
 914         }
 915
 916         ctrl |= HIGH_PERF_SQ;
 917         if (clock && clock->ck32k_lowpwr_enable)
 918                 ctrl |= CK32K_LOWPWR_EN;
 919
 920         e |= unprotect_pm_master();
 921         /* effect->MADC+USB ck en */
 922         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 923         e |= protect_pm_master();
 924
 925         if (e < 0)
 926                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 927 }
 928
 929 /*----------------------------------------------------------------------*/
 930
 931 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 932 int twl4030_exit_irq(void);
 933 int twl4030_init_chip_irq(const char *chip);
 934 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 935 int twl6030_exit_irq(void);
 936
 937 static int twl_remove(struct i2c_client *client)
 938 {
 939         unsigned i;
 940         int status;
 941
 942         if (twl_class_is_4030())
 943                 status = twl4030_exit_irq();
 944         else
 945                 status = twl6030_exit_irq();
 946
 947         if (status < 0)
 948                 return status;
 949
 950         for (i = 0; i < TWL_NUM_SLAVES; i++) {
 951                 struct twl_client       *twl = &twl_modules[i];
 952
 953                 if (twl->client && twl->client != client)
 954                         i2c_unregister_device(twl->client);
 955                 twl_modules[i].client = NULL;
 956         }
 957         inuse = false;
 958         return 0;
 959 }
 960
 961 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
 962 static int __init
 963 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
 964 {
 965         int                             status;
 966         unsigned                        i;
 967         struct twl4030_platform_data    *pdata = client->dev.platform_data;
 968
 969         if (!pdata) {
 970                 dev_dbg(&client->dev, "no platform data?\n");
 971                 return -EINVAL;
 972         }
 973
 974         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
 975                 dev_dbg(&client->dev, "can't talk I2C?\n");
 976                 return -EIO;
 977         }
 978
 979         if (inuse) {
 980                 dev_dbg(&client->dev, "driver is already in use\n");
 981                 return -EBUSY;
 982         }
 983
 984         for (i = 0; i < TWL_NUM_SLAVES; i++) {
 985                 struct twl_client       *twl = &twl_modules[i];
 986
 987                 twl->address = client->addr + i;
 988                 if (i == 0)
 989                         twl->client = client;
 990                 else {
 991                         twl->client = i2c_new_dummy(client->adapter,
 992                                         twl->address);
 993                         if (!twl->client) {
 994                                 dev_err(&client->dev,
 995                                         "can't attach client %d\n", i);
 996                                 status = -ENOMEM;
 997                                 goto fail;
 998                         }
 999                 }
1000                 mutex_init(&twl->xfer_lock);
1001         }
1002         inuse = true;
1003         if ((id->driver_data) & TWL6030_CLASS) {
1004                 twl_id = TWL6030_CLASS_ID;
1005                 twl_map = &twl6030_map[0];
1006         } else {
1007                 twl_id = TWL4030_CLASS_ID;
1008                 twl_map = &twl4030_map[0];
1009         }
1010
1011         /* setup clock framework */
1012         clocks_init(&client->dev, pdata->clock);
1013
1014         /* load power event scripts */
1015         if (twl_has_power() && pdata->power)
1016                 twl4030_power_init(pdata->power);
1017
1018         /* Maybe init the T2 Interrupt subsystem */
1019         if (client->irq
1020                         && pdata->irq_base
1021                         && pdata->irq_end > pdata->irq_base) {
1022                 if (twl_class_is_4030()) {
1023                         twl4030_init_chip_irq(id->name);
1024                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1025                         pdata->irq_end);
1026                 } else {
1027                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1028                         pdata->irq_end);
1029                 }
1030
1031                 if (status < 0)
1032                         goto fail;
1033         }
1034
1035         status = add_children(pdata, id->driver_data);
1036 fail:
1037         if (status < 0)
1038                 twl_remove(client);
1039         return status;
1040 }
1041
1042 static const struct i2c_device_id twl_ids[] = {
1043         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1044         { "twl5030", 0 },               /* T2 updated */
1045         { "twl5031", TWL5031 },         /* TWL5030 updated */
1046         { "tps65950", 0 },              /* catalog version of twl5030 */
1047         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1048         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1049         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1050         { /* end of list */ },
1051 };
1052 MODULE_DEVICE_TABLE(i2c, twl_ids);
1053
1054 /* One Client Driver , 4 Clients */
1055 static struct i2c_driver twl_driver = {
1056         .driver.name    = DRIVER_NAME,
1057         .id_table       = twl_ids,
1058         .probe          = twl_probe,
1059         .remove         = twl_remove,
1060 };
1061
1062 static int __init twl_init(void)
1063 {
1064         return i2c_add_driver(&twl_driver);
1065 }
1066 subsys_initcall(twl_init);
1067
1068 static void __exit twl_exit(void)
1069 {
1070         i2c_del_driver(&twl_driver);
1071 }
1072 module_exit(twl_exit);
1073
1074 MODULE_AUTHOR("Texas Instruments, Inc.");
1075 MODULE_DESCRIPTION("I2C Core interface for TWL");
1076 MODULE_LICENSE("GPL");