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_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE)
  62 #define twl_has_keypad()        true
  63 #else
  64 #define twl_has_keypad()        false
  65 #endif
  66
  67 #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE)
  68 #define twl_has_gpio()  true
  69 #else
  70 #define twl_has_gpio()  false
  71 #endif
  72
  73 #if defined(CONFIG_REGULATOR_TWL4030) \
  74         || defined(CONFIG_REGULATOR_TWL4030_MODULE)
  75 #define twl_has_regulator()     true
  76 #else
  77 #define twl_has_regulator()     false
  78 #endif
  79
  80 #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE)
  81 #define twl_has_madc()  true
  82 #else
  83 #define twl_has_madc()  false
  84 #endif
  85
  86 #ifdef CONFIG_TWL4030_POWER
  87 #define twl_has_power()        true
  88 #else
  89 #define twl_has_power()        false
  90 #endif
  91
  92 #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE)
  93 #define twl_has_rtc()   true
  94 #else
  95 #define twl_has_rtc()   false
  96 #endif
  97
  98 #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) ||\
  99         defined(CONFIG_TWL6030_USB) || defined(CONFIG_TWL6030_USB_MODULE)
 100 #define twl_has_usb()   true
 101 #else
 102 #define twl_has_usb()   false
 103 #endif
 104
 105 #if defined(CONFIG_TWL4030_WATCHDOG) || \
 106         defined(CONFIG_TWL4030_WATCHDOG_MODULE)
 107 #define twl_has_watchdog()        true
 108 #else
 109 #define twl_has_watchdog()        false
 110 #endif
 111
 112 #if defined(CONFIG_TWL4030_CODEC) || defined(CONFIG_TWL4030_CODEC_MODULE) ||\
 113         defined(CONFIG_SND_SOC_TWL6040) || defined(CONFIG_SND_SOC_TWL6040_MODULE)
 114 #define twl_has_codec() true
 115 #else
 116 #define twl_has_codec() false
 117 #endif
 118
 119 #if defined(CONFIG_CHARGER_TWL4030) || defined(CONFIG_CHARGER_TWL4030_MODULE)
 120 #define twl_has_bci()   true
 121 #else
 122 #define twl_has_bci()   false
 123 #endif
 124
 125 /* Triton Core internal information (BEGIN) */
 126
 127 /* Last - for index max*/
 128 #define TWL4030_MODULE_LAST             TWL4030_MODULE_SECURED_REG
 129
 130 #define TWL_NUM_SLAVES          4
 131
 132 #if defined(CONFIG_INPUT_TWL4030_PWRBUTTON) \
 133         || defined(CONFIG_INPUT_TWL4030_PWRBUTTON_MODULE)
 134 #define twl_has_pwrbutton()     true
 135 #else
 136 #define twl_has_pwrbutton()     false
 137 #endif
 138
 139 #define SUB_CHIP_ID0 0
 140 #define SUB_CHIP_ID1 1
 141 #define SUB_CHIP_ID2 2
 142 #define SUB_CHIP_ID3 3
 143
 144 #define TWL_MODULE_LAST TWL4030_MODULE_LAST
 145
 146 /* Base Address defns for twl4030_map[] */
 147
 148 /* subchip/slave 0 - USB ID */
 149 #define TWL4030_BASEADD_USB             0x0000
 150
 151 /* subchip/slave 1 - AUD ID */
 152 #define TWL4030_BASEADD_AUDIO_VOICE     0x0000
 153 #define TWL4030_BASEADD_GPIO            0x0098
 154 #define TWL4030_BASEADD_INTBR           0x0085
 155 #define TWL4030_BASEADD_PIH             0x0080
 156 #define TWL4030_BASEADD_TEST            0x004C
 157
 158 /* subchip/slave 2 - AUX ID */
 159 #define TWL4030_BASEADD_INTERRUPTS      0x00B9
 160 #define TWL4030_BASEADD_LED             0x00EE
 161 #define TWL4030_BASEADD_MADC            0x0000
 162 #define TWL4030_BASEADD_MAIN_CHARGE     0x0074
 163 #define TWL4030_BASEADD_PRECHARGE       0x00AA
 164 #define TWL4030_BASEADD_PWM0            0x00F8
 165 #define TWL4030_BASEADD_PWM1            0x00FB
 166 #define TWL4030_BASEADD_PWMA            0x00EF
 167 #define TWL4030_BASEADD_PWMB            0x00F1
 168 #define TWL4030_BASEADD_KEYPAD          0x00D2
 169
 170 #define TWL5031_BASEADD_ACCESSORY       0x0074 /* Replaces Main Charge */
 171 #define TWL5031_BASEADD_INTERRUPTS      0x00B9 /* Different than TWL4030's
 172                                                   one */
 173
 174 /* subchip/slave 3 - POWER ID */
 175 #define TWL4030_BASEADD_BACKUP          0x0014
 176 #define TWL4030_BASEADD_INT             0x002E
 177 #define TWL4030_BASEADD_PM_MASTER       0x0036
 178 #define TWL4030_BASEADD_PM_RECEIVER     0x005B
 179 #define TWL4030_BASEADD_RTC             0x001C
 180 #define TWL4030_BASEADD_SECURED_REG     0x0000
 181
 182 /* Triton Core internal information (END) */
 183
 184
 185 /* subchip/slave 0 0x48 - POWER */
 186 #define TWL6030_BASEADD_RTC             0x0000
 187 #define TWL6030_BASEADD_MEM             0x0017
 188 #define TWL6030_BASEADD_PM_MASTER       0x001F
 189 #define TWL6030_BASEADD_PM_SLAVE_MISC   0x0030 /* PM_RECEIVER */
 190 #define TWL6030_BASEADD_PM_MISC         0x00E2
 191 #define TWL6030_BASEADD_PM_PUPD         0x00F0
 192
 193 /* subchip/slave 1 0x49 - FEATURE */
 194 #define TWL6030_BASEADD_USB             0x0000
 195 #define TWL6030_BASEADD_GPADC_CTRL      0x002E
 196 #define TWL6030_BASEADD_AUX             0x0090
 197 #define TWL6030_BASEADD_PWM             0x00BA
 198 #define TWL6030_BASEADD_GASGAUGE        0x00C0
 199 #define TWL6030_BASEADD_PIH             0x00D0
 200 #define TWL6030_BASEADD_CHARGER         0x00E0
 201
 202 /* subchip/slave 2 0x4A - DFT */
 203 #define TWL6030_BASEADD_DIEID           0x00C0
 204
 205 /* subchip/slave 3 0x4B - AUDIO */
 206 #define TWL6030_BASEADD_AUDIO           0x0000
 207 #define TWL6030_BASEADD_RSV             0x0000
 208 #define TWL6030_BASEADD_ZERO            0x0000
 209
 210 /* Few power values */
 211 #define R_CFG_BOOT                      0x05
 212
 213 /* some fields in R_CFG_BOOT */
 214 #define HFCLK_FREQ_19p2_MHZ             (1 << 0)
 215 #define HFCLK_FREQ_26_MHZ               (2 << 0)
 216 #define HFCLK_FREQ_38p4_MHZ             (3 << 0)
 217 #define HIGH_PERF_SQ                    (1 << 3)
 218 #define CK32K_LOWPWR_EN                 (1 << 7)
 219
 220
 221 /* chip-specific feature flags, for i2c_device_id.driver_data */
 222 #define TWL4030_VAUX2           BIT(0)  /* pre-5030 voltage ranges */
 223 #define TPS_SUBSET              BIT(1)  /* tps659[23]0 have fewer LDOs */
 224 #define TWL5031                 BIT(2)  /* twl5031 has different registers */
 225 #define TWL6030_CLASS           BIT(3)  /* TWL6030 class */
 226
 227 /*----------------------------------------------------------------------*/
 228
 229 /* is driver active, bound to a chip? */
 230 static bool inuse;
 231
 232 static unsigned int twl_id;
 233 unsigned int twl_rev(void)
 234 {
 235         return twl_id;
 236 }
 237 EXPORT_SYMBOL(twl_rev);
 238
 239 /* Structure for each TWL4030/TWL6030 Slave */
 240 struct twl_client {
 241         struct i2c_client *client;
 242         u8 address;
 243
 244         /* max numb of i2c_msg required is for read =2 */
 245         struct i2c_msg xfer_msg[2];
 246
 247         /* To lock access to xfer_msg */
 248         struct mutex xfer_lock;
 249 };
 250
 251 static struct twl_client twl_modules[TWL_NUM_SLAVES];
 252
 253
 254 /* mapping the module id to slave id and base address */
 255 struct twl_mapping {
 256         unsigned char sid;      /* Slave ID */
 257         unsigned char base;     /* base address */
 258 };
 259 static struct twl_mapping *twl_map;
 260
 261 static struct twl_mapping twl4030_map[TWL4030_MODULE_LAST + 1] = {
 262         /*
 263          * NOTE:  don't change this table without updating the
 264          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 265          * so they continue to match the order in this table.
 266          */
 267
 268         { 0, TWL4030_BASEADD_USB },
 269
 270         { 1, TWL4030_BASEADD_AUDIO_VOICE },
 271         { 1, TWL4030_BASEADD_GPIO },
 272         { 1, TWL4030_BASEADD_INTBR },
 273         { 1, TWL4030_BASEADD_PIH },
 274         { 1, TWL4030_BASEADD_TEST },
 275
 276         { 2, TWL4030_BASEADD_KEYPAD },
 277         { 2, TWL4030_BASEADD_MADC },
 278         { 2, TWL4030_BASEADD_INTERRUPTS },
 279         { 2, TWL4030_BASEADD_LED },
 280         { 2, TWL4030_BASEADD_MAIN_CHARGE },
 281         { 2, TWL4030_BASEADD_PRECHARGE },
 282         { 2, TWL4030_BASEADD_PWM0 },
 283         { 2, TWL4030_BASEADD_PWM1 },
 284         { 2, TWL4030_BASEADD_PWMA },
 285         { 2, TWL4030_BASEADD_PWMB },
 286         { 2, TWL5031_BASEADD_ACCESSORY },
 287         { 2, TWL5031_BASEADD_INTERRUPTS },
 288
 289         { 3, TWL4030_BASEADD_BACKUP },
 290         { 3, TWL4030_BASEADD_INT },
 291         { 3, TWL4030_BASEADD_PM_MASTER },
 292         { 3, TWL4030_BASEADD_PM_RECEIVER },
 293         { 3, TWL4030_BASEADD_RTC },
 294         { 3, TWL4030_BASEADD_SECURED_REG },
 295 };
 296
 297 static struct twl_mapping twl6030_map[] = {
 298         /*
 299          * NOTE:  don't change this table without updating the
 300          * <linux/i2c/twl.h> defines for TWL4030_MODULE_*
 301          * so they continue to match the order in this table.
 302          */
 303         { SUB_CHIP_ID1, TWL6030_BASEADD_USB },
 304         { SUB_CHIP_ID3, TWL6030_BASEADD_AUDIO },
 305         { SUB_CHIP_ID2, TWL6030_BASEADD_DIEID },
 306         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 307         { SUB_CHIP_ID1, TWL6030_BASEADD_PIH },
 308
 309         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 310         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 311         { SUB_CHIP_ID1, TWL6030_BASEADD_GPADC_CTRL },
 312         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 313         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 314
 315         { SUB_CHIP_ID1, TWL6030_BASEADD_CHARGER },
 316         { SUB_CHIP_ID1, TWL6030_BASEADD_GASGAUGE },
 317         { SUB_CHIP_ID1, TWL6030_BASEADD_PWM },
 318         { SUB_CHIP_ID0, TWL6030_BASEADD_ZERO },
 319         { SUB_CHIP_ID1, TWL6030_BASEADD_ZERO },
 320
 321         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 322         { SUB_CHIP_ID2, TWL6030_BASEADD_ZERO },
 323         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 324         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 325         { SUB_CHIP_ID2, TWL6030_BASEADD_RSV },
 326         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_MASTER },
 327         { SUB_CHIP_ID0, TWL6030_BASEADD_PM_SLAVE_MISC },
 328
 329         { SUB_CHIP_ID0, TWL6030_BASEADD_RTC },
 330         { SUB_CHIP_ID0, TWL6030_BASEADD_MEM },
 331 };
 332
 333 /*----------------------------------------------------------------------*/
 334
 335 /* Exported Functions */
 336
 337 /**
 338  * twl_i2c_write - Writes a n bit register in TWL4030/TWL5030/TWL60X0
 339  * @mod_no: module number
 340  * @value: an array of num_bytes+1 containing data to write
 341  * @reg: register address (just offset will do)
 342  * @num_bytes: number of bytes to transfer
 343  *
 344  * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and
 345  * valid data starts at Offset 1.
 346  *
 347  * Returns the result of operation - 0 is success
 348  */
 349 int twl_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 350 {
 351         int ret;
 352         int sid;
 353         struct twl_client *twl;
 354         struct i2c_msg *msg;
 355
 356         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 357                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 358                 return -EPERM;
 359         }
 360         sid = twl_map[mod_no].sid;
 361         twl = &twl_modules[sid];
 362
 363         if (unlikely(!inuse)) {
 364                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 365                 return -EPERM;
 366         }
 367         mutex_lock(&twl->xfer_lock);
 368         /*
 369          * [MSG1]: fill the register address data
 370          * fill the data Tx buffer
 371          */
 372         msg = &twl->xfer_msg[0];
 373         msg->addr = twl->address;
 374         msg->len = num_bytes + 1;
 375         msg->flags = 0;
 376         msg->buf = value;
 377         /* over write the first byte of buffer with the register address */
 378         *value = twl_map[mod_no].base + reg;
 379         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1);
 380         mutex_unlock(&twl->xfer_lock);
 381
 382         /* i2c_transfer returns number of messages transferred */
 383         if (ret != 1) {
 384                 pr_err("%s: i2c_write failed to transfer all messages\n",
 385                         DRIVER_NAME);
 386                 if (ret < 0)
 387                         return ret;
 388                 else
 389                         return -EIO;
 390         } else {
 391                 return 0;
 392         }
 393 }
 394 EXPORT_SYMBOL(twl_i2c_write);
 395
 396 /**
 397  * twl_i2c_read - Reads a n bit register in TWL4030/TWL5030/TWL60X0
 398  * @mod_no: module number
 399  * @value: an array of num_bytes containing data to be read
 400  * @reg: register address (just offset will do)
 401  * @num_bytes: number of bytes to transfer
 402  *
 403  * Returns result of operation - num_bytes is success else failure.
 404  */
 405 int twl_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes)
 406 {
 407         int ret;
 408         u8 val;
 409         int sid;
 410         struct twl_client *twl;
 411         struct i2c_msg *msg;
 412
 413         if (unlikely(mod_no > TWL_MODULE_LAST)) {
 414                 pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no);
 415                 return -EPERM;
 416         }
 417         sid = twl_map[mod_no].sid;
 418         twl = &twl_modules[sid];
 419
 420         if (unlikely(!inuse)) {
 421                 pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid);
 422                 return -EPERM;
 423         }
 424         mutex_lock(&twl->xfer_lock);
 425         /* [MSG1] fill the register address data */
 426         msg = &twl->xfer_msg[0];
 427         msg->addr = twl->address;
 428         msg->len = 1;
 429         msg->flags = 0; /* Read the register value */
 430         val = twl_map[mod_no].base + reg;
 431         msg->buf = &val;
 432         /* [MSG2] fill the data rx buffer */
 433         msg = &twl->xfer_msg[1];
 434         msg->addr = twl->address;
 435         msg->flags = I2C_M_RD;  /* Read the register value */
 436         msg->len = num_bytes;   /* only n bytes */
 437         msg->buf = value;
 438         ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2);
 439         mutex_unlock(&twl->xfer_lock);
 440
 441         /* i2c_transfer returns number of messages transferred */
 442         if (ret != 2) {
 443                 pr_err("%s: i2c_read failed to transfer all messages\n",
 444                         DRIVER_NAME);
 445                 if (ret < 0)
 446                         return ret;
 447                 else
 448                         return -EIO;
 449         } else {
 450                 return 0;
 451         }
 452 }
 453 EXPORT_SYMBOL(twl_i2c_read);
 454
 455 /**
 456  * twl_i2c_write_u8 - Writes a 8 bit register in TWL4030/TWL5030/TWL60X0
 457  * @mod_no: module number
 458  * @value: the value to be written 8 bit
 459  * @reg: register address (just offset will do)
 460  *
 461  * Returns result of operation - 0 is success
 462  */
 463 int twl_i2c_write_u8(u8 mod_no, u8 value, u8 reg)
 464 {
 465
 466         /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */
 467         u8 temp_buffer[2] = { 0 };
 468         /* offset 1 contains the data */
 469         temp_buffer[1] = value;
 470         return twl_i2c_write(mod_no, temp_buffer, reg, 1);
 471 }
 472 EXPORT_SYMBOL(twl_i2c_write_u8);
 473
 474 /**
 475  * twl_i2c_read_u8 - Reads a 8 bit register from TWL4030/TWL5030/TWL60X0
 476  * @mod_no: module number
 477  * @value: the value read 8 bit
 478  * @reg: register address (just offset will do)
 479  *
 480  * Returns result of operation - 0 is success
 481  */
 482 int twl_i2c_read_u8(u8 mod_no, u8 *value, u8 reg)
 483 {
 484         return twl_i2c_read(mod_no, value, reg, 1);
 485 }
 486 EXPORT_SYMBOL(twl_i2c_read_u8);
 487
 488 /*----------------------------------------------------------------------*/
 489
 490 static struct device *
 491 add_numbered_child(unsigned chip, const char *name, int num,
 492                 void *pdata, unsigned pdata_len,
 493                 bool can_wakeup, int irq0, int irq1)
 494 {
 495         struct platform_device  *pdev;
 496         struct twl_client       *twl = &twl_modules[chip];
 497         int                     status;
 498
 499         pdev = platform_device_alloc(name, num);
 500         if (!pdev) {
 501                 dev_dbg(&twl->client->dev, "can't alloc dev\n");
 502                 status = -ENOMEM;
 503                 goto err;
 504         }
 505
 506         device_init_wakeup(&pdev->dev, can_wakeup);
 507         pdev->dev.parent = &twl->client->dev;
 508
 509         if (pdata) {
 510                 status = platform_device_add_data(pdev, pdata, pdata_len);
 511                 if (status < 0) {
 512                         dev_dbg(&pdev->dev, "can't add platform_data\n");
 513                         goto err;
 514                 }
 515         }
 516
 517         if (irq0) {
 518                 struct resource r[2] = {
 519                         { .start = irq0, .flags = IORESOURCE_IRQ, },
 520                         { .start = irq1, .flags = IORESOURCE_IRQ, },
 521                 };
 522
 523                 status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1);
 524                 if (status < 0) {
 525                         dev_dbg(&pdev->dev, "can't add irqs\n");
 526                         goto err;
 527                 }
 528         }
 529
 530         status = platform_device_add(pdev);
 531
 532 err:
 533         if (status < 0) {
 534                 platform_device_put(pdev);
 535                 dev_err(&twl->client->dev, "can't add %s dev\n", name);
 536                 return ERR_PTR(status);
 537         }
 538         return &pdev->dev;
 539 }
 540
 541 static inline struct device *add_child(unsigned chip, const char *name,
 542                 void *pdata, unsigned pdata_len,
 543                 bool can_wakeup, int irq0, int irq1)
 544 {
 545         return add_numbered_child(chip, name, -1, pdata, pdata_len,
 546                 can_wakeup, irq0, irq1);
 547 }
 548
 549 static struct device *
 550 add_regulator_linked(int num, struct regulator_init_data *pdata,
 551                 struct regulator_consumer_supply *consumers,
 552                 unsigned num_consumers)
 553 {
 554         unsigned sub_chip_id;
 555         /* regulator framework demands init_data ... */
 556         if (!pdata)
 557                 return NULL;
 558
 559         if (consumers) {
 560                 pdata->consumer_supplies = consumers;
 561                 pdata->num_consumer_supplies = num_consumers;
 562         }
 563
 564         /* NOTE:  we currently ignore regulator IRQs, e.g. for short circuits */
 565         sub_chip_id = twl_map[TWL_MODULE_PM_MASTER].sid;
 566         return add_numbered_child(sub_chip_id, "twl_reg", num,
 567                 pdata, sizeof(*pdata), false, 0, 0);
 568 }
 569
 570 static struct device *
 571 add_regulator(int num, struct regulator_init_data *pdata)
 572 {
 573         return add_regulator_linked(num, pdata, NULL, 0);
 574 }
 575
 576 /*
 577  * NOTE:  We know the first 8 IRQs after pdata->base_irq are
 578  * for the PIH, and the next are for the PWR_INT SIH, since
 579  * that's how twl_init_irq() sets things up.
 580  */
 581
 582 static int
 583 add_children(struct twl4030_platform_data *pdata, unsigned long features)
 584 {
 585         struct device   *child;
 586         unsigned sub_chip_id;
 587
 588         if (twl_has_gpio() && pdata->gpio) {
 589                 child = add_child(SUB_CHIP_ID1, "twl4030_gpio",
 590                                 pdata->gpio, sizeof(*pdata->gpio),
 591                                 false, pdata->irq_base + GPIO_INTR_OFFSET, 0);
 592                 if (IS_ERR(child))
 593                         return PTR_ERR(child);
 594         }
 595
 596         if (twl_has_keypad() && pdata->keypad) {
 597                 child = add_child(SUB_CHIP_ID2, "twl4030_keypad",
 598                                 pdata->keypad, sizeof(*pdata->keypad),
 599                                 true, pdata->irq_base + KEYPAD_INTR_OFFSET, 0);
 600                 if (IS_ERR(child))
 601                         return PTR_ERR(child);
 602         }
 603
 604         if (twl_has_madc() && pdata->madc) {
 605                 child = add_child(2, "twl4030_madc",
 606                                 pdata->madc, sizeof(*pdata->madc),
 607                                 true, pdata->irq_base + MADC_INTR_OFFSET, 0);
 608                 if (IS_ERR(child))
 609                         return PTR_ERR(child);
 610         }
 611
 612         if (twl_has_rtc()) {
 613                 /*
 614                  * REVISIT platform_data here currently might expose the
 615                  * "msecure" line ... but for now we just expect board
 616                  * setup to tell the chip "it's always ok to SET_TIME".
 617                  * Eventually, Linux might become more aware of such
 618                  * HW security concerns, and "least privilege".
 619                  */
 620                 sub_chip_id = twl_map[TWL_MODULE_RTC].sid;
 621                 child = add_child(sub_chip_id, "twl_rtc",
 622                                 NULL, 0,
 623                                 true, pdata->irq_base + RTC_INTR_OFFSET, 0);
 624                 if (IS_ERR(child))
 625                         return PTR_ERR(child);
 626         }
 627
 628         if (twl_has_usb() && pdata->usb && twl_class_is_4030()) {
 629
 630                 static struct regulator_consumer_supply usb1v5 = {
 631                         .supply =       "usb1v5",
 632                 };
 633                 static struct regulator_consumer_supply usb1v8 = {
 634                         .supply =       "usb1v8",
 635                 };
 636                 static struct regulator_consumer_supply usb3v1 = {
 637                         .supply =       "usb3v1",
 638                 };
 639
 640         /* First add the regulators so that they can be used by transceiver */
 641                 if (twl_has_regulator()) {
 642                         /* this is a template that gets copied */
 643                         struct regulator_init_data usb_fixed = {
 644                                 .constraints.valid_modes_mask =
 645                                         REGULATOR_MODE_NORMAL
 646                                         | REGULATOR_MODE_STANDBY,
 647                                 .constraints.valid_ops_mask =
 648                                         REGULATOR_CHANGE_MODE
 649                                         | REGULATOR_CHANGE_STATUS,
 650                         };
 651
 652                         child = add_regulator_linked(TWL4030_REG_VUSB1V5,
 653                                                       &usb_fixed, &usb1v5, 1);
 654                         if (IS_ERR(child))
 655                                 return PTR_ERR(child);
 656
 657                         child = add_regulator_linked(TWL4030_REG_VUSB1V8,
 658                                                       &usb_fixed, &usb1v8, 1);
 659                         if (IS_ERR(child))
 660                                 return PTR_ERR(child);
 661
 662                         child = add_regulator_linked(TWL4030_REG_VUSB3V1,
 663                                                       &usb_fixed, &usb3v1, 1);
 664                         if (IS_ERR(child))
 665                                 return PTR_ERR(child);
 666
 667                 }
 668
 669                 child = add_child(0, "twl4030_usb",
 670                                 pdata->usb, sizeof(*pdata->usb),
 671                                 true,
 672                                 /* irq0 = USB_PRES, irq1 = USB */
 673                                 pdata->irq_base + USB_PRES_INTR_OFFSET,
 674                                 pdata->irq_base + USB_INTR_OFFSET);
 675
 676                 if (IS_ERR(child))
 677                         return PTR_ERR(child);
 678
 679                 /* we need to connect regulators to this transceiver */
 680                 if (twl_has_regulator() && child) {
 681                         usb1v5.dev = child;
 682                         usb1v8.dev = child;
 683                         usb3v1.dev = child;
 684                 }
 685         }
 686         if (twl_has_usb() && pdata->usb && twl_class_is_6030()) {
 687
 688                 static struct regulator_consumer_supply usb3v3 = {
 689                         .supply =       "vusb",
 690                 };
 691
 692                 if (twl_has_regulator()) {
 693                         /* this is a template that gets copied */
 694                         struct regulator_init_data usb_fixed = {
 695                                 .constraints.valid_modes_mask =
 696                                         REGULATOR_MODE_NORMAL
 697                                         | REGULATOR_MODE_STANDBY,
 698                                 .constraints.valid_ops_mask =
 699                                         REGULATOR_CHANGE_MODE
 700                                         | REGULATOR_CHANGE_STATUS,
 701                         };
 702
 703                         child = add_regulator_linked(TWL6030_REG_VUSB,
 704                                                       &usb_fixed, &usb3v3, 1);
 705                         if (IS_ERR(child))
 706                                 return PTR_ERR(child);
 707                 }
 708
 709                 child = add_child(0, "twl6030_usb",
 710                         pdata->usb, sizeof(*pdata->usb),
 711                         true,
 712                         /* irq1 = VBUS_PRES, irq0 = USB ID */
 713                         pdata->irq_base + USBOTG_INTR_OFFSET,
 714                         pdata->irq_base + USB_PRES_INTR_OFFSET);
 715
 716                 if (IS_ERR(child))
 717                         return PTR_ERR(child);
 718                 /* we need to connect regulators to this transceiver */
 719                 if (twl_has_regulator() && child)
 720                         usb3v3.dev = child;
 721
 722         }
 723
 724         if (twl_has_watchdog()) {
 725                 child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0);
 726                 if (IS_ERR(child))
 727                         return PTR_ERR(child);
 728         }
 729
 730         if (twl_has_pwrbutton()) {
 731                 child = add_child(1, "twl4030_pwrbutton",
 732                                 NULL, 0, true, pdata->irq_base + 8 + 0, 0);
 733                 if (IS_ERR(child))
 734                         return PTR_ERR(child);
 735         }
 736
 737         if (twl_has_codec() && pdata->codec && twl_class_is_4030()) {
 738                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 739                 child = add_child(sub_chip_id, "twl4030-audio",
 740                                 pdata->codec, sizeof(*pdata->codec),
 741                                 false, 0, 0);
 742                 if (IS_ERR(child))
 743                         return PTR_ERR(child);
 744         }
 745
 746         /* Phoenix codec driver is probed directly atm */
 747         if (twl_has_codec() && pdata->codec && twl_class_is_6030()) {
 748                 sub_chip_id = twl_map[TWL_MODULE_AUDIO_VOICE].sid;
 749                 child = add_child(sub_chip_id, "twl6040-codec",
 750                                 pdata->codec, sizeof(*pdata->codec),
 751                                 false, 0, 0);
 752                 if (IS_ERR(child))
 753                         return PTR_ERR(child);
 754         }
 755
 756         /* twl4030 regulators */
 757         if (twl_has_regulator() && twl_class_is_4030()) {
 758                 child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1);
 759                 if (IS_ERR(child))
 760                         return PTR_ERR(child);
 761
 762                 child = add_regulator(TWL4030_REG_VIO, pdata->vio);
 763                 if (IS_ERR(child))
 764                         return PTR_ERR(child);
 765
 766                 child = add_regulator(TWL4030_REG_VDD1, pdata->vdd1);
 767                 if (IS_ERR(child))
 768                         return PTR_ERR(child);
 769
 770                 child = add_regulator(TWL4030_REG_VDD2, pdata->vdd2);
 771                 if (IS_ERR(child))
 772                         return PTR_ERR(child);
 773
 774                 child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1);
 775                 if (IS_ERR(child))
 776                         return PTR_ERR(child);
 777
 778                 child = add_regulator(TWL4030_REG_VDAC, pdata->vdac);
 779                 if (IS_ERR(child))
 780                         return PTR_ERR(child);
 781
 782                 child = add_regulator((features & TWL4030_VAUX2)
 783                                         ? TWL4030_REG_VAUX2_4030
 784                                         : TWL4030_REG_VAUX2,
 785                                 pdata->vaux2);
 786                 if (IS_ERR(child))
 787                         return PTR_ERR(child);
 788
 789                 child = add_regulator(TWL4030_REG_VINTANA1, pdata->vintana1);
 790                 if (IS_ERR(child))
 791                         return PTR_ERR(child);
 792
 793                 child = add_regulator(TWL4030_REG_VINTANA2, pdata->vintana2);
 794                 if (IS_ERR(child))
 795                         return PTR_ERR(child);
 796
 797                 child = add_regulator(TWL4030_REG_VINTDIG, pdata->vintdig);
 798                 if (IS_ERR(child))
 799                         return PTR_ERR(child);
 800         }
 801
 802         /* maybe add LDOs that are omitted on cost-reduced parts */
 803         if (twl_has_regulator() && !(features & TPS_SUBSET)
 804           && twl_class_is_4030()) {
 805                 child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2);
 806                 if (IS_ERR(child))
 807                         return PTR_ERR(child);
 808
 809                 child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2);
 810                 if (IS_ERR(child))
 811                         return PTR_ERR(child);
 812
 813                 child = add_regulator(TWL4030_REG_VSIM, pdata->vsim);
 814                 if (IS_ERR(child))
 815                         return PTR_ERR(child);
 816
 817                 child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1);
 818                 if (IS_ERR(child))
 819                         return PTR_ERR(child);
 820
 821                 child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3);
 822                 if (IS_ERR(child))
 823                         return PTR_ERR(child);
 824
 825                 child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4);
 826                 if (IS_ERR(child))
 827                         return PTR_ERR(child);
 828         }
 829
 830         /* twl6030 regulators */
 831         if (twl_has_regulator() && twl_class_is_6030()) {
 832                 child = add_regulator(TWL6030_REG_VMMC, pdata->vmmc);
 833                 if (IS_ERR(child))
 834                         return PTR_ERR(child);
 835
 836                 child = add_regulator(TWL6030_REG_VPP, pdata->vpp);
 837                 if (IS_ERR(child))
 838                         return PTR_ERR(child);
 839
 840                 child = add_regulator(TWL6030_REG_VUSIM, pdata->vusim);
 841                 if (IS_ERR(child))
 842                         return PTR_ERR(child);
 843
 844                 child = add_regulator(TWL6030_REG_VANA, pdata->vana);
 845                 if (IS_ERR(child))
 846                         return PTR_ERR(child);
 847
 848                 child = add_regulator(TWL6030_REG_VCXIO, pdata->vcxio);
 849                 if (IS_ERR(child))
 850                         return PTR_ERR(child);
 851
 852                 child = add_regulator(TWL6030_REG_VDAC, pdata->vdac);
 853                 if (IS_ERR(child))
 854                         return PTR_ERR(child);
 855
 856                 child = add_regulator(TWL6030_REG_VAUX1_6030, pdata->vaux1);
 857                 if (IS_ERR(child))
 858                         return PTR_ERR(child);
 859
 860                 child = add_regulator(TWL6030_REG_VAUX2_6030, pdata->vaux2);
 861                 if (IS_ERR(child))
 862                         return PTR_ERR(child);
 863
 864                 child = add_regulator(TWL6030_REG_VAUX3_6030, pdata->vaux3);
 865                 if (IS_ERR(child))
 866                         return PTR_ERR(child);
 867         }
 868
 869         if (twl_has_bci() && pdata->bci &&
 870                         !(features & (TPS_SUBSET | TWL5031))) {
 871                 child = add_child(3, "twl4030_bci",
 872                                 pdata->bci, sizeof(*pdata->bci), false,
 873                                 /* irq0 = CHG_PRES, irq1 = BCI */
 874                                 pdata->irq_base + BCI_PRES_INTR_OFFSET,
 875                                 pdata->irq_base + BCI_INTR_OFFSET);
 876                 if (IS_ERR(child))
 877                         return PTR_ERR(child);
 878         }
 879
 880         return 0;
 881 }
 882
 883 /*----------------------------------------------------------------------*/
 884
 885 /*
 886  * These three functions initialize the on-chip clock framework,
 887  * letting it generate the right frequencies for USB, MADC, and
 888  * other purposes.
 889  */
 890 static inline int __init protect_pm_master(void)
 891 {
 892         int e = 0;
 893
 894         e = twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER, 0,
 895                         TWL4030_PM_MASTER_PROTECT_KEY);
 896         return e;
 897 }
 898
 899 static inline int __init unprotect_pm_master(void)
 900 {
 901         int e = 0;
 902
 903         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 904                         TWL4030_PM_MASTER_KEY_CFG1,
 905                         TWL4030_PM_MASTER_PROTECT_KEY);
 906         e |= twl_i2c_write_u8(TWL4030_MODULE_PM_MASTER,
 907                         TWL4030_PM_MASTER_KEY_CFG2,
 908                         TWL4030_PM_MASTER_PROTECT_KEY);
 909
 910         return e;
 911 }
 912
 913 static void clocks_init(struct device *dev,
 914                         struct twl4030_clock_init_data *clock)
 915 {
 916         int e = 0;
 917         struct clk *osc;
 918         u32 rate;
 919         u8 ctrl = HFCLK_FREQ_26_MHZ;
 920
 921 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
 922         if (cpu_is_omap2430())
 923                 osc = clk_get(dev, "osc_ck");
 924         else
 925                 osc = clk_get(dev, "osc_sys_ck");
 926
 927         if (IS_ERR(osc)) {
 928                 printk(KERN_WARNING "Skipping twl internal clock init and "
 929                                 "using bootloader value (unknown osc rate)\n");
 930                 return;
 931         }
 932
 933         rate = clk_get_rate(osc);
 934         clk_put(osc);
 935
 936 #else
 937         /* REVISIT for non-OMAP systems, pass the clock rate from
 938          * board init code, using platform_data.
 939          */
 940         osc = ERR_PTR(-EIO);
 941
 942         printk(KERN_WARNING "Skipping twl internal clock init and "
 943                "using bootloader value (unknown osc rate)\n");
 944
 945         return;
 946 #endif
 947
 948         switch (rate) {
 949         case 19200000:
 950                 ctrl = HFCLK_FREQ_19p2_MHZ;
 951                 break;
 952         case 26000000:
 953                 ctrl = HFCLK_FREQ_26_MHZ;
 954                 break;
 955         case 38400000:
 956                 ctrl = HFCLK_FREQ_38p4_MHZ;
 957                 break;
 958         }
 959
 960         ctrl |= HIGH_PERF_SQ;
 961         if (clock && clock->ck32k_lowpwr_enable)
 962                 ctrl |= CK32K_LOWPWR_EN;
 963
 964         e |= unprotect_pm_master();
 965         /* effect->MADC+USB ck en */
 966         e |= twl_i2c_write_u8(TWL_MODULE_PM_MASTER, ctrl, R_CFG_BOOT);
 967         e |= protect_pm_master();
 968
 969         if (e < 0)
 970                 pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e);
 971 }
 972
 973 /*----------------------------------------------------------------------*/
 974
 975 int twl4030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 976 int twl4030_exit_irq(void);
 977 int twl4030_init_chip_irq(const char *chip);
 978 int twl6030_init_irq(int irq_num, unsigned irq_base, unsigned irq_end);
 979 int twl6030_exit_irq(void);
 980
 981 static int twl_remove(struct i2c_client *client)
 982 {
 983         unsigned i;
 984         int status;
 985
 986         if (twl_class_is_4030())
 987                 status = twl4030_exit_irq();
 988         else
 989                 status = twl6030_exit_irq();
 990
 991         if (status < 0)
 992                 return status;
 993
 994         for (i = 0; i < TWL_NUM_SLAVES; i++) {
 995                 struct twl_client       *twl = &twl_modules[i];
 996
 997                 if (twl->client && twl->client != client)
 998                         i2c_unregister_device(twl->client);
 999                 twl_modules[i].client = NULL;
1000         }
1001         inuse = false;
1002         return 0;
1003 }
1004
1005 /* NOTE:  this driver only handles a single twl4030/tps659x0 chip */
1006 static int __devinit
1007 twl_probe(struct i2c_client *client, const struct i2c_device_id *id)
1008 {
1009         int                             status;
1010         unsigned                        i;
1011         struct twl4030_platform_data    *pdata = client->dev.platform_data;
1012         u8 temp;
1013
1014         if (!pdata) {
1015                 dev_dbg(&client->dev, "no platform data?\n");
1016                 return -EINVAL;
1017         }
1018
1019         if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) {
1020                 dev_dbg(&client->dev, "can't talk I2C?\n");
1021                 return -EIO;
1022         }
1023
1024         if (inuse) {
1025                 dev_dbg(&client->dev, "driver is already in use\n");
1026                 return -EBUSY;
1027         }
1028
1029         for (i = 0; i < TWL_NUM_SLAVES; i++) {
1030                 struct twl_client       *twl = &twl_modules[i];
1031
1032                 twl->address = client->addr + i;
1033                 if (i == 0)
1034                         twl->client = client;
1035                 else {
1036                         twl->client = i2c_new_dummy(client->adapter,
1037                                         twl->address);
1038                         if (!twl->client) {
1039                                 dev_err(&client->dev,
1040                                         "can't attach client %d\n", i);
1041                                 status = -ENOMEM;
1042                                 goto fail;
1043                         }
1044                 }
1045                 mutex_init(&twl->xfer_lock);
1046         }
1047         inuse = true;
1048         if ((id->driver_data) & TWL6030_CLASS) {
1049                 twl_id = TWL6030_CLASS_ID;
1050                 twl_map = &twl6030_map[0];
1051         } else {
1052                 twl_id = TWL4030_CLASS_ID;
1053                 twl_map = &twl4030_map[0];
1054         }
1055
1056         /* setup clock framework */
1057         clocks_init(&client->dev, pdata->clock);
1058
1059         /* load power event scripts */
1060         if (twl_has_power() && pdata->power)
1061                 twl4030_power_init(pdata->power);
1062
1063         /* Maybe init the T2 Interrupt subsystem */
1064         if (client->irq
1065                         && pdata->irq_base
1066                         && pdata->irq_end > pdata->irq_base) {
1067                 if (twl_class_is_4030()) {
1068                         twl4030_init_chip_irq(id->name);
1069                         status = twl4030_init_irq(client->irq, pdata->irq_base,
1070                         pdata->irq_end);
1071                 } else {
1072                         status = twl6030_init_irq(client->irq, pdata->irq_base,
1073                         pdata->irq_end);
1074                 }
1075
1076                 if (status < 0)
1077                         goto fail;
1078         }
1079
1080         /* Disable TWL4030/TWL5030 I2C Pull-up on I2C1 and I2C4(SR) interface.
1081          * Program I2C_SCL_CTRL_PU(bit 0)=0, I2C_SDA_CTRL_PU (bit 2)=0,
1082          * SR_I2C_SCL_CTRL_PU(bit 4)=0 and SR_I2C_SDA_CTRL_PU(bit 6)=0.
1083          */
1084
1085         if (twl_class_is_4030()) {
1086                 twl_i2c_read_u8(TWL4030_MODULE_INTBR, &temp, REG_GPPUPDCTR1);
1087                 temp &= ~(SR_I2C_SDA_CTRL_PU | SR_I2C_SCL_CTRL_PU | \
1088                 I2C_SDA_CTRL_PU | I2C_SCL_CTRL_PU);
1089                 twl_i2c_write_u8(TWL4030_MODULE_INTBR, temp, REG_GPPUPDCTR1);
1090         }
1091
1092         status = add_children(pdata, id->driver_data);
1093 fail:
1094         if (status < 0)
1095                 twl_remove(client);
1096         return status;
1097 }
1098
1099 static const struct i2c_device_id twl_ids[] = {
1100         { "twl4030", TWL4030_VAUX2 },   /* "Triton 2" */
1101         { "twl5030", 0 },               /* T2 updated */
1102         { "twl5031", TWL5031 },         /* TWL5030 updated */
1103         { "tps65950", 0 },              /* catalog version of twl5030 */
1104         { "tps65930", TPS_SUBSET },     /* fewer LDOs and DACs; no charger */
1105         { "tps65920", TPS_SUBSET },     /* fewer LDOs; no codec or charger */
1106         { "twl6030", TWL6030_CLASS },   /* "Phoenix power chip" */
1107         { /* end of list */ },
1108 };
1109 MODULE_DEVICE_TABLE(i2c, twl_ids);
1110
1111 /* One Client Driver , 4 Clients */
1112 static struct i2c_driver twl_driver = {
1113         .driver.name    = DRIVER_NAME,
1114         .id_table       = twl_ids,
1115         .probe          = twl_probe,
1116         .remove         = twl_remove,
1117 };
1118
1119 static int __init twl_init(void)
1120 {
1121         return i2c_add_driver(&twl_driver);
1122 }
1123 subsys_initcall(twl_init);
1124
1125 static void __exit twl_exit(void)
1126 {
1127         i2c_del_driver(&twl_driver);
1128 }
1129 module_exit(twl_exit);
1130
1131 MODULE_AUTHOR("Texas Instruments, Inc.");
1132 MODULE_DESCRIPTION("I2C Core interface for TWL");
1133 MODULE_LICENSE("GPL");