David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 1 | /* |
| 2 | * twl4030_core.c - driver for TWL4030/TPS659x0 PM and audio CODEC devices |
| 3 | * |
| 4 | * Copyright (C) 2005-2006 Texas Instruments, Inc. |
| 5 | * |
| 6 | * Modifications to defer interrupt handling to a kernel thread: |
| 7 | * Copyright (C) 2006 MontaVista Software, Inc. |
| 8 | * |
| 9 | * Based on tlv320aic23.c: |
| 10 | * Copyright (c) by Kai Svahn <kai.svahn@nokia.com> |
| 11 | * |
| 12 | * Code cleanup and modifications to IRQ handler. |
| 13 | * by syed khasim <x0khasim@ti.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify |
| 16 | * it under the terms of the GNU General Public License as published by |
| 17 | * the Free Software Foundation; either version 2 of the License, or |
| 18 | * (at your option) any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, |
| 21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 23 | * GNU General Public License for more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License |
| 26 | * along with this program; if not, write to the Free Software |
| 27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 28 | */ |
| 29 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 30 | #include <linux/init.h> |
| 31 | #include <linux/mutex.h> |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 32 | #include <linux/platform_device.h> |
| 33 | #include <linux/clk.h> |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 34 | #include <linux/err.h> |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 35 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 36 | #include <linux/regulator/machine.h> |
| 37 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 38 | #include <linux/i2c.h> |
| 39 | #include <linux/i2c/twl4030.h> |
| 40 | |
Mark Brown | a313d75 | 2009-02-04 21:26:07 +0100 | [diff] [blame] | 41 | #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) |
Samuel Ortiz | b29c06a | 2009-01-11 01:21:48 +0100 | [diff] [blame] | 42 | #include <mach/cpu.h> |
| 43 | #endif |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 44 | |
| 45 | /* |
| 46 | * The TWL4030 "Triton 2" is one of a family of a multi-function "Power |
| 47 | * Management and System Companion Device" chips originally designed for |
| 48 | * use in OMAP2 and OMAP 3 based systems. Its control interfaces use I2C, |
| 49 | * often at around 3 Mbit/sec, including for interrupt handling. |
| 50 | * |
| 51 | * This driver core provides genirq support for the interrupts emitted, |
| 52 | * by the various modules, and exports register access primitives. |
| 53 | * |
| 54 | * FIXME this driver currently requires use of the first interrupt line |
| 55 | * (and associated registers). |
| 56 | */ |
| 57 | |
| 58 | #define DRIVER_NAME "twl4030" |
| 59 | |
| 60 | #if defined(CONFIG_TWL4030_BCI_BATTERY) || \ |
| 61 | defined(CONFIG_TWL4030_BCI_BATTERY_MODULE) |
| 62 | #define twl_has_bci() true |
| 63 | #else |
| 64 | #define twl_has_bci() false |
| 65 | #endif |
| 66 | |
| 67 | #if defined(CONFIG_KEYBOARD_TWL4030) || defined(CONFIG_KEYBOARD_TWL4030_MODULE) |
| 68 | #define twl_has_keypad() true |
| 69 | #else |
| 70 | #define twl_has_keypad() false |
| 71 | #endif |
| 72 | |
| 73 | #if defined(CONFIG_GPIO_TWL4030) || defined(CONFIG_GPIO_TWL4030_MODULE) |
| 74 | #define twl_has_gpio() true |
| 75 | #else |
| 76 | #define twl_has_gpio() false |
| 77 | #endif |
| 78 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 79 | #if defined(CONFIG_REGULATOR_TWL4030) \ |
| 80 | || defined(CONFIG_REGULATOR_TWL4030_MODULE) |
| 81 | #define twl_has_regulator() true |
| 82 | #else |
| 83 | #define twl_has_regulator() false |
| 84 | #endif |
| 85 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 86 | #if defined(CONFIG_TWL4030_MADC) || defined(CONFIG_TWL4030_MADC_MODULE) |
| 87 | #define twl_has_madc() true |
| 88 | #else |
| 89 | #define twl_has_madc() false |
| 90 | #endif |
| 91 | |
| 92 | #if defined(CONFIG_RTC_DRV_TWL4030) || defined(CONFIG_RTC_DRV_TWL4030_MODULE) |
| 93 | #define twl_has_rtc() true |
| 94 | #else |
| 95 | #define twl_has_rtc() false |
| 96 | #endif |
| 97 | |
| 98 | #if defined(CONFIG_TWL4030_USB) || defined(CONFIG_TWL4030_USB_MODULE) |
| 99 | #define twl_has_usb() true |
| 100 | #else |
| 101 | #define twl_has_usb() false |
| 102 | #endif |
| 103 | |
Timo Kokkonen | 80e45b1 | 2009-03-27 16:42:17 +0200 | [diff] [blame] | 104 | #if defined(CONFIG_TWL4030_WATCHDOG) || \ |
| 105 | defined(CONFIG_TWL4030_WATCHDOG_MODULE) |
| 106 | #define twl_has_watchdog() true |
| 107 | #else |
| 108 | #define twl_has_watchdog() false |
| 109 | #endif |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 110 | |
| 111 | /* Triton Core internal information (BEGIN) */ |
| 112 | |
| 113 | /* Last - for index max*/ |
| 114 | #define TWL4030_MODULE_LAST TWL4030_MODULE_SECURED_REG |
| 115 | |
| 116 | #define TWL4030_NUM_SLAVES 4 |
| 117 | |
| 118 | |
| 119 | /* Base Address defns for twl4030_map[] */ |
| 120 | |
| 121 | /* subchip/slave 0 - USB ID */ |
| 122 | #define TWL4030_BASEADD_USB 0x0000 |
| 123 | |
| 124 | /* subchip/slave 1 - AUD ID */ |
| 125 | #define TWL4030_BASEADD_AUDIO_VOICE 0x0000 |
| 126 | #define TWL4030_BASEADD_GPIO 0x0098 |
| 127 | #define TWL4030_BASEADD_INTBR 0x0085 |
| 128 | #define TWL4030_BASEADD_PIH 0x0080 |
| 129 | #define TWL4030_BASEADD_TEST 0x004C |
| 130 | |
| 131 | /* subchip/slave 2 - AUX ID */ |
| 132 | #define TWL4030_BASEADD_INTERRUPTS 0x00B9 |
| 133 | #define TWL4030_BASEADD_LED 0x00EE |
| 134 | #define TWL4030_BASEADD_MADC 0x0000 |
| 135 | #define TWL4030_BASEADD_MAIN_CHARGE 0x0074 |
| 136 | #define TWL4030_BASEADD_PRECHARGE 0x00AA |
| 137 | #define TWL4030_BASEADD_PWM0 0x00F8 |
| 138 | #define TWL4030_BASEADD_PWM1 0x00FB |
| 139 | #define TWL4030_BASEADD_PWMA 0x00EF |
| 140 | #define TWL4030_BASEADD_PWMB 0x00F1 |
| 141 | #define TWL4030_BASEADD_KEYPAD 0x00D2 |
| 142 | |
| 143 | /* subchip/slave 3 - POWER ID */ |
| 144 | #define TWL4030_BASEADD_BACKUP 0x0014 |
| 145 | #define TWL4030_BASEADD_INT 0x002E |
| 146 | #define TWL4030_BASEADD_PM_MASTER 0x0036 |
| 147 | #define TWL4030_BASEADD_PM_RECEIVER 0x005B |
| 148 | #define TWL4030_BASEADD_RTC 0x001C |
| 149 | #define TWL4030_BASEADD_SECURED_REG 0x0000 |
| 150 | |
| 151 | /* Triton Core internal information (END) */ |
| 152 | |
| 153 | |
| 154 | /* Few power values */ |
| 155 | #define R_CFG_BOOT 0x05 |
| 156 | #define R_PROTECT_KEY 0x0E |
| 157 | |
| 158 | /* access control values for R_PROTECT_KEY */ |
| 159 | #define KEY_UNLOCK1 0xce |
| 160 | #define KEY_UNLOCK2 0xec |
| 161 | #define KEY_LOCK 0x00 |
| 162 | |
| 163 | /* some fields in R_CFG_BOOT */ |
| 164 | #define HFCLK_FREQ_19p2_MHZ (1 << 0) |
| 165 | #define HFCLK_FREQ_26_MHZ (2 << 0) |
| 166 | #define HFCLK_FREQ_38p4_MHZ (3 << 0) |
| 167 | #define HIGH_PERF_SQ (1 << 3) |
| 168 | |
| 169 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 170 | /* chip-specific feature flags, for i2c_device_id.driver_data */ |
| 171 | #define TWL4030_VAUX2 BIT(0) /* pre-5030 voltage ranges */ |
| 172 | #define TPS_SUBSET BIT(1) /* tps659[23]0 have fewer LDOs */ |
| 173 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 174 | /*----------------------------------------------------------------------*/ |
| 175 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 176 | /* is driver active, bound to a chip? */ |
| 177 | static bool inuse; |
| 178 | |
| 179 | /* Structure for each TWL4030 Slave */ |
| 180 | struct twl4030_client { |
| 181 | struct i2c_client *client; |
| 182 | u8 address; |
| 183 | |
| 184 | /* max numb of i2c_msg required is for read =2 */ |
| 185 | struct i2c_msg xfer_msg[2]; |
| 186 | |
| 187 | /* To lock access to xfer_msg */ |
| 188 | struct mutex xfer_lock; |
| 189 | }; |
| 190 | |
| 191 | static struct twl4030_client twl4030_modules[TWL4030_NUM_SLAVES]; |
| 192 | |
| 193 | |
| 194 | /* mapping the module id to slave id and base address */ |
| 195 | struct twl4030mapping { |
| 196 | unsigned char sid; /* Slave ID */ |
| 197 | unsigned char base; /* base address */ |
| 198 | }; |
| 199 | |
| 200 | static struct twl4030mapping twl4030_map[TWL4030_MODULE_LAST + 1] = { |
| 201 | /* |
| 202 | * NOTE: don't change this table without updating the |
| 203 | * <linux/i2c/twl4030.h> defines for TWL4030_MODULE_* |
| 204 | * so they continue to match the order in this table. |
| 205 | */ |
| 206 | |
| 207 | { 0, TWL4030_BASEADD_USB }, |
| 208 | |
| 209 | { 1, TWL4030_BASEADD_AUDIO_VOICE }, |
| 210 | { 1, TWL4030_BASEADD_GPIO }, |
| 211 | { 1, TWL4030_BASEADD_INTBR }, |
| 212 | { 1, TWL4030_BASEADD_PIH }, |
| 213 | { 1, TWL4030_BASEADD_TEST }, |
| 214 | |
| 215 | { 2, TWL4030_BASEADD_KEYPAD }, |
| 216 | { 2, TWL4030_BASEADD_MADC }, |
| 217 | { 2, TWL4030_BASEADD_INTERRUPTS }, |
| 218 | { 2, TWL4030_BASEADD_LED }, |
| 219 | { 2, TWL4030_BASEADD_MAIN_CHARGE }, |
| 220 | { 2, TWL4030_BASEADD_PRECHARGE }, |
| 221 | { 2, TWL4030_BASEADD_PWM0 }, |
| 222 | { 2, TWL4030_BASEADD_PWM1 }, |
| 223 | { 2, TWL4030_BASEADD_PWMA }, |
| 224 | { 2, TWL4030_BASEADD_PWMB }, |
| 225 | |
| 226 | { 3, TWL4030_BASEADD_BACKUP }, |
| 227 | { 3, TWL4030_BASEADD_INT }, |
| 228 | { 3, TWL4030_BASEADD_PM_MASTER }, |
| 229 | { 3, TWL4030_BASEADD_PM_RECEIVER }, |
| 230 | { 3, TWL4030_BASEADD_RTC }, |
| 231 | { 3, TWL4030_BASEADD_SECURED_REG }, |
| 232 | }; |
| 233 | |
| 234 | /*----------------------------------------------------------------------*/ |
| 235 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 236 | /* Exported Functions */ |
| 237 | |
| 238 | /** |
| 239 | * twl4030_i2c_write - Writes a n bit register in TWL4030 |
| 240 | * @mod_no: module number |
| 241 | * @value: an array of num_bytes+1 containing data to write |
| 242 | * @reg: register address (just offset will do) |
| 243 | * @num_bytes: number of bytes to transfer |
| 244 | * |
| 245 | * IMPORTANT: for 'value' parameter: Allocate value num_bytes+1 and |
| 246 | * valid data starts at Offset 1. |
| 247 | * |
| 248 | * Returns the result of operation - 0 is success |
| 249 | */ |
David Brownell | 3fba19e | 2008-11-08 01:13:16 +0100 | [diff] [blame] | 250 | int twl4030_i2c_write(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 251 | { |
| 252 | int ret; |
| 253 | int sid; |
| 254 | struct twl4030_client *twl; |
| 255 | struct i2c_msg *msg; |
| 256 | |
| 257 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { |
| 258 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); |
| 259 | return -EPERM; |
| 260 | } |
| 261 | sid = twl4030_map[mod_no].sid; |
| 262 | twl = &twl4030_modules[sid]; |
| 263 | |
| 264 | if (unlikely(!inuse)) { |
| 265 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); |
| 266 | return -EPERM; |
| 267 | } |
| 268 | mutex_lock(&twl->xfer_lock); |
| 269 | /* |
| 270 | * [MSG1]: fill the register address data |
| 271 | * fill the data Tx buffer |
| 272 | */ |
| 273 | msg = &twl->xfer_msg[0]; |
| 274 | msg->addr = twl->address; |
| 275 | msg->len = num_bytes + 1; |
| 276 | msg->flags = 0; |
| 277 | msg->buf = value; |
| 278 | /* over write the first byte of buffer with the register address */ |
| 279 | *value = twl4030_map[mod_no].base + reg; |
| 280 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 1); |
| 281 | mutex_unlock(&twl->xfer_lock); |
| 282 | |
| 283 | /* i2cTransfer returns num messages.translate it pls.. */ |
| 284 | if (ret >= 0) |
| 285 | ret = 0; |
| 286 | return ret; |
| 287 | } |
| 288 | EXPORT_SYMBOL(twl4030_i2c_write); |
| 289 | |
| 290 | /** |
| 291 | * twl4030_i2c_read - Reads a n bit register in TWL4030 |
| 292 | * @mod_no: module number |
| 293 | * @value: an array of num_bytes containing data to be read |
| 294 | * @reg: register address (just offset will do) |
| 295 | * @num_bytes: number of bytes to transfer |
| 296 | * |
| 297 | * Returns result of operation - num_bytes is success else failure. |
| 298 | */ |
David Brownell | 3fba19e | 2008-11-08 01:13:16 +0100 | [diff] [blame] | 299 | int twl4030_i2c_read(u8 mod_no, u8 *value, u8 reg, unsigned num_bytes) |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 300 | { |
| 301 | int ret; |
| 302 | u8 val; |
| 303 | int sid; |
| 304 | struct twl4030_client *twl; |
| 305 | struct i2c_msg *msg; |
| 306 | |
| 307 | if (unlikely(mod_no > TWL4030_MODULE_LAST)) { |
| 308 | pr_err("%s: invalid module number %d\n", DRIVER_NAME, mod_no); |
| 309 | return -EPERM; |
| 310 | } |
| 311 | sid = twl4030_map[mod_no].sid; |
| 312 | twl = &twl4030_modules[sid]; |
| 313 | |
| 314 | if (unlikely(!inuse)) { |
| 315 | pr_err("%s: client %d is not initialized\n", DRIVER_NAME, sid); |
| 316 | return -EPERM; |
| 317 | } |
| 318 | mutex_lock(&twl->xfer_lock); |
| 319 | /* [MSG1] fill the register address data */ |
| 320 | msg = &twl->xfer_msg[0]; |
| 321 | msg->addr = twl->address; |
| 322 | msg->len = 1; |
| 323 | msg->flags = 0; /* Read the register value */ |
| 324 | val = twl4030_map[mod_no].base + reg; |
| 325 | msg->buf = &val; |
| 326 | /* [MSG2] fill the data rx buffer */ |
| 327 | msg = &twl->xfer_msg[1]; |
| 328 | msg->addr = twl->address; |
| 329 | msg->flags = I2C_M_RD; /* Read the register value */ |
| 330 | msg->len = num_bytes; /* only n bytes */ |
| 331 | msg->buf = value; |
| 332 | ret = i2c_transfer(twl->client->adapter, twl->xfer_msg, 2); |
| 333 | mutex_unlock(&twl->xfer_lock); |
| 334 | |
| 335 | /* i2cTransfer returns num messages.translate it pls.. */ |
| 336 | if (ret >= 0) |
| 337 | ret = 0; |
| 338 | return ret; |
| 339 | } |
| 340 | EXPORT_SYMBOL(twl4030_i2c_read); |
| 341 | |
| 342 | /** |
| 343 | * twl4030_i2c_write_u8 - Writes a 8 bit register in TWL4030 |
| 344 | * @mod_no: module number |
| 345 | * @value: the value to be written 8 bit |
| 346 | * @reg: register address (just offset will do) |
| 347 | * |
| 348 | * Returns result of operation - 0 is success |
| 349 | */ |
| 350 | int twl4030_i2c_write_u8(u8 mod_no, u8 value, u8 reg) |
| 351 | { |
| 352 | |
| 353 | /* 2 bytes offset 1 contains the data offset 0 is used by i2c_write */ |
| 354 | u8 temp_buffer[2] = { 0 }; |
| 355 | /* offset 1 contains the data */ |
| 356 | temp_buffer[1] = value; |
| 357 | return twl4030_i2c_write(mod_no, temp_buffer, reg, 1); |
| 358 | } |
| 359 | EXPORT_SYMBOL(twl4030_i2c_write_u8); |
| 360 | |
| 361 | /** |
| 362 | * twl4030_i2c_read_u8 - Reads a 8 bit register from TWL4030 |
| 363 | * @mod_no: module number |
| 364 | * @value: the value read 8 bit |
| 365 | * @reg: register address (just offset will do) |
| 366 | * |
| 367 | * Returns result of operation - 0 is success |
| 368 | */ |
| 369 | int twl4030_i2c_read_u8(u8 mod_no, u8 *value, u8 reg) |
| 370 | { |
| 371 | return twl4030_i2c_read(mod_no, value, reg, 1); |
| 372 | } |
| 373 | EXPORT_SYMBOL(twl4030_i2c_read_u8); |
| 374 | |
| 375 | /*----------------------------------------------------------------------*/ |
| 376 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 377 | static struct device * |
| 378 | add_numbered_child(unsigned chip, const char *name, int num, |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 379 | void *pdata, unsigned pdata_len, |
| 380 | bool can_wakeup, int irq0, int irq1) |
| 381 | { |
| 382 | struct platform_device *pdev; |
| 383 | struct twl4030_client *twl = &twl4030_modules[chip]; |
| 384 | int status; |
| 385 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 386 | pdev = platform_device_alloc(name, num); |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 387 | if (!pdev) { |
| 388 | dev_dbg(&twl->client->dev, "can't alloc dev\n"); |
| 389 | status = -ENOMEM; |
| 390 | goto err; |
| 391 | } |
| 392 | |
| 393 | device_init_wakeup(&pdev->dev, can_wakeup); |
| 394 | pdev->dev.parent = &twl->client->dev; |
| 395 | |
| 396 | if (pdata) { |
| 397 | status = platform_device_add_data(pdev, pdata, pdata_len); |
| 398 | if (status < 0) { |
| 399 | dev_dbg(&pdev->dev, "can't add platform_data\n"); |
| 400 | goto err; |
| 401 | } |
| 402 | } |
| 403 | |
| 404 | if (irq0) { |
| 405 | struct resource r[2] = { |
| 406 | { .start = irq0, .flags = IORESOURCE_IRQ, }, |
| 407 | { .start = irq1, .flags = IORESOURCE_IRQ, }, |
| 408 | }; |
| 409 | |
| 410 | status = platform_device_add_resources(pdev, r, irq1 ? 2 : 1); |
| 411 | if (status < 0) { |
| 412 | dev_dbg(&pdev->dev, "can't add irqs\n"); |
| 413 | goto err; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | status = platform_device_add(pdev); |
| 418 | |
| 419 | err: |
| 420 | if (status < 0) { |
| 421 | platform_device_put(pdev); |
| 422 | dev_err(&twl->client->dev, "can't add %s dev\n", name); |
| 423 | return ERR_PTR(status); |
| 424 | } |
| 425 | return &pdev->dev; |
| 426 | } |
| 427 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 428 | static inline struct device *add_child(unsigned chip, const char *name, |
| 429 | void *pdata, unsigned pdata_len, |
| 430 | bool can_wakeup, int irq0, int irq1) |
| 431 | { |
| 432 | return add_numbered_child(chip, name, -1, pdata, pdata_len, |
| 433 | can_wakeup, irq0, irq1); |
| 434 | } |
| 435 | |
| 436 | static struct device * |
| 437 | add_regulator_linked(int num, struct regulator_init_data *pdata, |
| 438 | struct regulator_consumer_supply *consumers, |
| 439 | unsigned num_consumers) |
| 440 | { |
| 441 | /* regulator framework demands init_data ... */ |
| 442 | if (!pdata) |
| 443 | return NULL; |
| 444 | |
David Brownell | b73eac7 | 2008-12-07 19:10:58 +0100 | [diff] [blame] | 445 | if (consumers) { |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 446 | pdata->consumer_supplies = consumers; |
| 447 | pdata->num_consumer_supplies = num_consumers; |
| 448 | } |
| 449 | |
| 450 | /* NOTE: we currently ignore regulator IRQs, e.g. for short circuits */ |
| 451 | return add_numbered_child(3, "twl4030_reg", num, |
| 452 | pdata, sizeof(*pdata), false, 0, 0); |
| 453 | } |
| 454 | |
| 455 | static struct device * |
| 456 | add_regulator(int num, struct regulator_init_data *pdata) |
| 457 | { |
| 458 | return add_regulator_linked(num, pdata, NULL, 0); |
| 459 | } |
| 460 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 461 | /* |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 462 | * NOTE: We know the first 8 IRQs after pdata->base_irq are |
| 463 | * for the PIH, and the next are for the PWR_INT SIH, since |
| 464 | * that's how twl_init_irq() sets things up. |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 465 | */ |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 466 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 467 | static int |
| 468 | add_children(struct twl4030_platform_data *pdata, unsigned long features) |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 469 | { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 470 | struct device *child; |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 471 | struct device *usb_transceiver = NULL; |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 472 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 473 | if (twl_has_bci() && pdata->bci && !(features & TPS_SUBSET)) { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 474 | child = add_child(3, "twl4030_bci", |
| 475 | pdata->bci, sizeof(*pdata->bci), |
| 476 | false, |
| 477 | /* irq0 = CHG_PRES, irq1 = BCI */ |
| 478 | pdata->irq_base + 8 + 1, pdata->irq_base + 2); |
| 479 | if (IS_ERR(child)) |
| 480 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 481 | } |
| 482 | |
| 483 | if (twl_has_gpio() && pdata->gpio) { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 484 | child = add_child(1, "twl4030_gpio", |
| 485 | pdata->gpio, sizeof(*pdata->gpio), |
| 486 | false, pdata->irq_base + 0, 0); |
| 487 | if (IS_ERR(child)) |
| 488 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 489 | } |
| 490 | |
| 491 | if (twl_has_keypad() && pdata->keypad) { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 492 | child = add_child(2, "twl4030_keypad", |
| 493 | pdata->keypad, sizeof(*pdata->keypad), |
| 494 | true, pdata->irq_base + 1, 0); |
| 495 | if (IS_ERR(child)) |
| 496 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | if (twl_has_madc() && pdata->madc) { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 500 | child = add_child(2, "twl4030_madc", |
| 501 | pdata->madc, sizeof(*pdata->madc), |
| 502 | true, pdata->irq_base + 3, 0); |
| 503 | if (IS_ERR(child)) |
| 504 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 505 | } |
| 506 | |
| 507 | if (twl_has_rtc()) { |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 508 | /* |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 509 | * REVISIT platform_data here currently might expose the |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 510 | * "msecure" line ... but for now we just expect board |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 511 | * setup to tell the chip "it's always ok to SET_TIME". |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 512 | * Eventually, Linux might become more aware of such |
| 513 | * HW security concerns, and "least privilege". |
| 514 | */ |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 515 | child = add_child(3, "twl4030_rtc", |
| 516 | NULL, 0, |
| 517 | true, pdata->irq_base + 8 + 3, 0); |
| 518 | if (IS_ERR(child)) |
| 519 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 520 | } |
| 521 | |
| 522 | if (twl_has_usb() && pdata->usb) { |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 523 | child = add_child(0, "twl4030_usb", |
| 524 | pdata->usb, sizeof(*pdata->usb), |
| 525 | true, |
| 526 | /* irq0 = USB_PRES, irq1 = USB */ |
| 527 | pdata->irq_base + 8 + 2, pdata->irq_base + 4); |
| 528 | if (IS_ERR(child)) |
| 529 | return PTR_ERR(child); |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 530 | |
| 531 | /* we need to connect regulators to this transceiver */ |
| 532 | usb_transceiver = child; |
| 533 | } |
| 534 | |
Timo Kokkonen | 80e45b1 | 2009-03-27 16:42:17 +0200 | [diff] [blame] | 535 | if (twl_has_watchdog()) { |
| 536 | child = add_child(0, "twl4030_wdt", NULL, 0, false, 0, 0); |
| 537 | if (IS_ERR(child)) |
| 538 | return PTR_ERR(child); |
| 539 | } |
| 540 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 541 | if (twl_has_regulator()) { |
| 542 | /* |
| 543 | child = add_regulator(TWL4030_REG_VPLL1, pdata->vpll1); |
| 544 | if (IS_ERR(child)) |
| 545 | return PTR_ERR(child); |
| 546 | */ |
| 547 | |
| 548 | child = add_regulator(TWL4030_REG_VMMC1, pdata->vmmc1); |
| 549 | if (IS_ERR(child)) |
| 550 | return PTR_ERR(child); |
| 551 | |
| 552 | child = add_regulator(TWL4030_REG_VDAC, pdata->vdac); |
| 553 | if (IS_ERR(child)) |
| 554 | return PTR_ERR(child); |
| 555 | |
| 556 | child = add_regulator((features & TWL4030_VAUX2) |
| 557 | ? TWL4030_REG_VAUX2_4030 |
| 558 | : TWL4030_REG_VAUX2, |
| 559 | pdata->vaux2); |
| 560 | if (IS_ERR(child)) |
| 561 | return PTR_ERR(child); |
| 562 | } |
| 563 | |
| 564 | if (twl_has_regulator() && usb_transceiver) { |
| 565 | static struct regulator_consumer_supply usb1v5 = { |
| 566 | .supply = "usb1v5", |
| 567 | }; |
| 568 | static struct regulator_consumer_supply usb1v8 = { |
| 569 | .supply = "usb1v8", |
| 570 | }; |
| 571 | static struct regulator_consumer_supply usb3v1 = { |
| 572 | .supply = "usb3v1", |
| 573 | }; |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 574 | |
| 575 | /* this is a template that gets copied */ |
| 576 | struct regulator_init_data usb_fixed = { |
| 577 | .constraints.valid_modes_mask = |
| 578 | REGULATOR_MODE_NORMAL |
| 579 | | REGULATOR_MODE_STANDBY, |
| 580 | .constraints.valid_ops_mask = |
| 581 | REGULATOR_CHANGE_MODE |
| 582 | | REGULATOR_CHANGE_STATUS, |
| 583 | }; |
| 584 | |
| 585 | usb1v5.dev = usb_transceiver; |
| 586 | usb1v8.dev = usb_transceiver; |
| 587 | usb3v1.dev = usb_transceiver; |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 588 | |
| 589 | child = add_regulator_linked(TWL4030_REG_VUSB1V5, &usb_fixed, |
| 590 | &usb1v5, 1); |
| 591 | if (IS_ERR(child)) |
| 592 | return PTR_ERR(child); |
| 593 | |
| 594 | child = add_regulator_linked(TWL4030_REG_VUSB1V8, &usb_fixed, |
| 595 | &usb1v8, 1); |
| 596 | if (IS_ERR(child)) |
| 597 | return PTR_ERR(child); |
| 598 | |
| 599 | child = add_regulator_linked(TWL4030_REG_VUSB3V1, &usb_fixed, |
| 600 | &usb3v1, 1); |
| 601 | if (IS_ERR(child)) |
| 602 | return PTR_ERR(child); |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | /* maybe add LDOs that are omitted on cost-reduced parts */ |
| 606 | if (twl_has_regulator() && !(features & TPS_SUBSET)) { |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 607 | child = add_regulator(TWL4030_REG_VPLL2, pdata->vpll2); |
| 608 | if (IS_ERR(child)) |
| 609 | return PTR_ERR(child); |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 610 | |
| 611 | child = add_regulator(TWL4030_REG_VMMC2, pdata->vmmc2); |
| 612 | if (IS_ERR(child)) |
| 613 | return PTR_ERR(child); |
| 614 | |
| 615 | child = add_regulator(TWL4030_REG_VSIM, pdata->vsim); |
| 616 | if (IS_ERR(child)) |
| 617 | return PTR_ERR(child); |
| 618 | |
| 619 | child = add_regulator(TWL4030_REG_VAUX1, pdata->vaux1); |
| 620 | if (IS_ERR(child)) |
| 621 | return PTR_ERR(child); |
| 622 | |
| 623 | child = add_regulator(TWL4030_REG_VAUX3, pdata->vaux3); |
| 624 | if (IS_ERR(child)) |
| 625 | return PTR_ERR(child); |
| 626 | |
| 627 | child = add_regulator(TWL4030_REG_VAUX4, pdata->vaux4); |
| 628 | if (IS_ERR(child)) |
| 629 | return PTR_ERR(child); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 630 | } |
| 631 | |
David Brownell | 5725d66 | 2008-12-01 00:31:04 +0100 | [diff] [blame] | 632 | return 0; |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 633 | } |
| 634 | |
| 635 | /*----------------------------------------------------------------------*/ |
| 636 | |
| 637 | /* |
| 638 | * These three functions initialize the on-chip clock framework, |
| 639 | * letting it generate the right frequencies for USB, MADC, and |
| 640 | * other purposes. |
| 641 | */ |
| 642 | static inline int __init protect_pm_master(void) |
| 643 | { |
| 644 | int e = 0; |
| 645 | |
| 646 | e = twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_LOCK, |
| 647 | R_PROTECT_KEY); |
| 648 | return e; |
| 649 | } |
| 650 | |
| 651 | static inline int __init unprotect_pm_master(void) |
| 652 | { |
| 653 | int e = 0; |
| 654 | |
| 655 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK1, |
| 656 | R_PROTECT_KEY); |
| 657 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, KEY_UNLOCK2, |
| 658 | R_PROTECT_KEY); |
| 659 | return e; |
| 660 | } |
| 661 | |
Rakib Mullick | 04ffa13 | 2009-04-19 08:56:49 +0600 | [diff] [blame] | 662 | static void clocks_init(struct device *dev) |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 663 | { |
| 664 | int e = 0; |
| 665 | struct clk *osc; |
| 666 | u32 rate; |
| 667 | u8 ctrl = HFCLK_FREQ_26_MHZ; |
| 668 | |
| 669 | #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3) |
| 670 | if (cpu_is_omap2430()) |
Russell King | e6b50c8d | 2009-01-10 10:40:42 +0000 | [diff] [blame] | 671 | osc = clk_get(dev, "osc_ck"); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 672 | else |
Russell King | e6b50c8d | 2009-01-10 10:40:42 +0000 | [diff] [blame] | 673 | osc = clk_get(dev, "osc_sys_ck"); |
Samuel Ortiz | 6354ab5 | 2008-12-07 20:50:25 +0100 | [diff] [blame] | 674 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 675 | if (IS_ERR(osc)) { |
| 676 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " |
| 677 | "using bootloader value (unknown osc rate)\n"); |
| 678 | return; |
| 679 | } |
| 680 | |
| 681 | rate = clk_get_rate(osc); |
| 682 | clk_put(osc); |
| 683 | |
Samuel Ortiz | 6354ab5 | 2008-12-07 20:50:25 +0100 | [diff] [blame] | 684 | #else |
| 685 | /* REVISIT for non-OMAP systems, pass the clock rate from |
| 686 | * board init code, using platform_data. |
| 687 | */ |
| 688 | osc = ERR_PTR(-EIO); |
| 689 | |
| 690 | printk(KERN_WARNING "Skipping twl4030 internal clock init and " |
| 691 | "using bootloader value (unknown osc rate)\n"); |
| 692 | |
| 693 | return; |
| 694 | #endif |
| 695 | |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 696 | switch (rate) { |
| 697 | case 19200000: |
| 698 | ctrl = HFCLK_FREQ_19p2_MHZ; |
| 699 | break; |
| 700 | case 26000000: |
| 701 | ctrl = HFCLK_FREQ_26_MHZ; |
| 702 | break; |
| 703 | case 38400000: |
| 704 | ctrl = HFCLK_FREQ_38p4_MHZ; |
| 705 | break; |
| 706 | } |
| 707 | |
| 708 | ctrl |= HIGH_PERF_SQ; |
| 709 | e |= unprotect_pm_master(); |
| 710 | /* effect->MADC+USB ck en */ |
| 711 | e |= twl4030_i2c_write_u8(TWL4030_MODULE_PM_MASTER, ctrl, R_CFG_BOOT); |
| 712 | e |= protect_pm_master(); |
| 713 | |
| 714 | if (e < 0) |
| 715 | pr_err("%s: clock init err [%d]\n", DRIVER_NAME, e); |
| 716 | } |
| 717 | |
| 718 | /*----------------------------------------------------------------------*/ |
| 719 | |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 720 | int twl_init_irq(int irq_num, unsigned irq_base, unsigned irq_end); |
| 721 | int twl_exit_irq(void); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 722 | |
| 723 | static int twl4030_remove(struct i2c_client *client) |
| 724 | { |
| 725 | unsigned i; |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 726 | int status; |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 727 | |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 728 | status = twl_exit_irq(); |
| 729 | if (status < 0) |
| 730 | return status; |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 731 | |
| 732 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { |
| 733 | struct twl4030_client *twl = &twl4030_modules[i]; |
| 734 | |
| 735 | if (twl->client && twl->client != client) |
| 736 | i2c_unregister_device(twl->client); |
| 737 | twl4030_modules[i].client = NULL; |
| 738 | } |
| 739 | inuse = false; |
| 740 | return 0; |
| 741 | } |
| 742 | |
| 743 | /* NOTE: this driver only handles a single twl4030/tps659x0 chip */ |
| 744 | static int |
| 745 | twl4030_probe(struct i2c_client *client, const struct i2c_device_id *id) |
| 746 | { |
| 747 | int status; |
| 748 | unsigned i; |
| 749 | struct twl4030_platform_data *pdata = client->dev.platform_data; |
| 750 | |
| 751 | if (!pdata) { |
| 752 | dev_dbg(&client->dev, "no platform data?\n"); |
| 753 | return -EINVAL; |
| 754 | } |
| 755 | |
| 756 | if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) == 0) { |
| 757 | dev_dbg(&client->dev, "can't talk I2C?\n"); |
| 758 | return -EIO; |
| 759 | } |
| 760 | |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 761 | if (inuse) { |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 762 | dev_dbg(&client->dev, "driver is already in use\n"); |
| 763 | return -EBUSY; |
| 764 | } |
| 765 | |
| 766 | for (i = 0; i < TWL4030_NUM_SLAVES; i++) { |
| 767 | struct twl4030_client *twl = &twl4030_modules[i]; |
| 768 | |
| 769 | twl->address = client->addr + i; |
| 770 | if (i == 0) |
| 771 | twl->client = client; |
| 772 | else { |
| 773 | twl->client = i2c_new_dummy(client->adapter, |
| 774 | twl->address); |
| 775 | if (!twl->client) { |
| 776 | dev_err(&twl->client->dev, |
| 777 | "can't attach client %d\n", i); |
| 778 | status = -ENOMEM; |
| 779 | goto fail; |
| 780 | } |
| 781 | strlcpy(twl->client->name, id->name, |
| 782 | sizeof(twl->client->name)); |
| 783 | } |
| 784 | mutex_init(&twl->xfer_lock); |
| 785 | } |
| 786 | inuse = true; |
| 787 | |
| 788 | /* setup clock framework */ |
Russell King | e6b50c8d | 2009-01-10 10:40:42 +0000 | [diff] [blame] | 789 | clocks_init(&client->dev); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 790 | |
| 791 | /* Maybe init the T2 Interrupt subsystem */ |
| 792 | if (client->irq |
| 793 | && pdata->irq_base |
| 794 | && pdata->irq_end > pdata->irq_base) { |
David Brownell | a30d46c | 2008-10-20 23:46:28 +0200 | [diff] [blame] | 795 | status = twl_init_irq(client->irq, pdata->irq_base, pdata->irq_end); |
| 796 | if (status < 0) |
| 797 | goto fail; |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 798 | } |
| 799 | |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 800 | status = add_children(pdata, id->driver_data); |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 801 | fail: |
| 802 | if (status < 0) |
| 803 | twl4030_remove(client); |
| 804 | return status; |
| 805 | } |
| 806 | |
| 807 | static const struct i2c_device_id twl4030_ids[] = { |
David Brownell | dad759f | 2008-12-01 00:43:58 +0100 | [diff] [blame] | 808 | { "twl4030", TWL4030_VAUX2 }, /* "Triton 2" */ |
| 809 | { "twl5030", 0 }, /* T2 updated */ |
| 810 | { "tps65950", 0 }, /* catalog version of twl5030 */ |
| 811 | { "tps65930", TPS_SUBSET }, /* fewer LDOs and DACs; no charger */ |
| 812 | { "tps65920", TPS_SUBSET }, /* fewer LDOs; no codec or charger */ |
David Brownell | a603a7f | 2008-10-15 12:15:39 +0200 | [diff] [blame] | 813 | { /* end of list */ }, |
| 814 | }; |
| 815 | MODULE_DEVICE_TABLE(i2c, twl4030_ids); |
| 816 | |
| 817 | /* One Client Driver , 4 Clients */ |
| 818 | static struct i2c_driver twl4030_driver = { |
| 819 | .driver.name = DRIVER_NAME, |
| 820 | .id_table = twl4030_ids, |
| 821 | .probe = twl4030_probe, |
| 822 | .remove = twl4030_remove, |
| 823 | }; |
| 824 | |
| 825 | static int __init twl4030_init(void) |
| 826 | { |
| 827 | return i2c_add_driver(&twl4030_driver); |
| 828 | } |
| 829 | subsys_initcall(twl4030_init); |
| 830 | |
| 831 | static void __exit twl4030_exit(void) |
| 832 | { |
| 833 | i2c_del_driver(&twl4030_driver); |
| 834 | } |
| 835 | module_exit(twl4030_exit); |
| 836 | |
| 837 | MODULE_AUTHOR("Texas Instruments, Inc."); |
| 838 | MODULE_DESCRIPTION("I2C Core interface for TWL4030"); |
| 839 | MODULE_LICENSE("GPL"); |