Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 1 | /* |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 2 | * ST Microelectronics MFD: stmpe's driver |
| 3 | * |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 4 | * Copyright (C) ST-Ericsson SA 2010 |
| 5 | * |
| 6 | * License Terms: GNU General Public License, version 2 |
| 7 | * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson |
| 8 | */ |
| 9 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 10 | #include <linux/gpio.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 11 | #include <linux/kernel.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 12 | #include <linux/interrupt.h> |
| 13 | #include <linux/irq.h> |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 14 | #include <linux/pm.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 15 | #include <linux/slab.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 16 | #include <linux/mfd/core.h> |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 17 | #include "stmpe.h" |
| 18 | |
| 19 | static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) |
| 20 | { |
| 21 | return stmpe->variant->enable(stmpe, blocks, true); |
| 22 | } |
| 23 | |
| 24 | static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks) |
| 25 | { |
| 26 | return stmpe->variant->enable(stmpe, blocks, false); |
| 27 | } |
| 28 | |
| 29 | static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) |
| 30 | { |
| 31 | int ret; |
| 32 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 33 | ret = stmpe->ci->read_byte(stmpe, reg); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 34 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 35 | dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 36 | |
| 37 | dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); |
| 38 | |
| 39 | return ret; |
| 40 | } |
| 41 | |
| 42 | static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) |
| 43 | { |
| 44 | int ret; |
| 45 | |
| 46 | dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); |
| 47 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 48 | ret = stmpe->ci->write_byte(stmpe, reg, val); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 49 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 50 | dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 51 | |
| 52 | return ret; |
| 53 | } |
| 54 | |
| 55 | static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) |
| 56 | { |
| 57 | int ret; |
| 58 | |
| 59 | ret = __stmpe_reg_read(stmpe, reg); |
| 60 | if (ret < 0) |
| 61 | return ret; |
| 62 | |
| 63 | ret &= ~mask; |
| 64 | ret |= val; |
| 65 | |
| 66 | return __stmpe_reg_write(stmpe, reg, ret); |
| 67 | } |
| 68 | |
| 69 | static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, |
| 70 | u8 *values) |
| 71 | { |
| 72 | int ret; |
| 73 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 74 | ret = stmpe->ci->read_block(stmpe, reg, length, values); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 75 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 76 | dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 77 | |
| 78 | dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); |
| 79 | stmpe_dump_bytes("stmpe rd: ", values, length); |
| 80 | |
| 81 | return ret; |
| 82 | } |
| 83 | |
| 84 | static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, |
| 85 | const u8 *values) |
| 86 | { |
| 87 | int ret; |
| 88 | |
| 89 | dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); |
| 90 | stmpe_dump_bytes("stmpe wr: ", values, length); |
| 91 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 92 | ret = stmpe->ci->write_block(stmpe, reg, length, values); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 93 | if (ret < 0) |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 94 | dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 95 | |
| 96 | return ret; |
| 97 | } |
| 98 | |
| 99 | /** |
| 100 | * stmpe_enable - enable blocks on an STMPE device |
| 101 | * @stmpe: Device to work on |
| 102 | * @blocks: Mask of blocks (enum stmpe_block values) to enable |
| 103 | */ |
| 104 | int stmpe_enable(struct stmpe *stmpe, unsigned int blocks) |
| 105 | { |
| 106 | int ret; |
| 107 | |
| 108 | mutex_lock(&stmpe->lock); |
| 109 | ret = __stmpe_enable(stmpe, blocks); |
| 110 | mutex_unlock(&stmpe->lock); |
| 111 | |
| 112 | return ret; |
| 113 | } |
| 114 | EXPORT_SYMBOL_GPL(stmpe_enable); |
| 115 | |
| 116 | /** |
| 117 | * stmpe_disable - disable blocks on an STMPE device |
| 118 | * @stmpe: Device to work on |
| 119 | * @blocks: Mask of blocks (enum stmpe_block values) to enable |
| 120 | */ |
| 121 | int stmpe_disable(struct stmpe *stmpe, unsigned int blocks) |
| 122 | { |
| 123 | int ret; |
| 124 | |
| 125 | mutex_lock(&stmpe->lock); |
| 126 | ret = __stmpe_disable(stmpe, blocks); |
| 127 | mutex_unlock(&stmpe->lock); |
| 128 | |
| 129 | return ret; |
| 130 | } |
| 131 | EXPORT_SYMBOL_GPL(stmpe_disable); |
| 132 | |
| 133 | /** |
| 134 | * stmpe_reg_read() - read a single STMPE register |
| 135 | * @stmpe: Device to read from |
| 136 | * @reg: Register to read |
| 137 | */ |
| 138 | int stmpe_reg_read(struct stmpe *stmpe, u8 reg) |
| 139 | { |
| 140 | int ret; |
| 141 | |
| 142 | mutex_lock(&stmpe->lock); |
| 143 | ret = __stmpe_reg_read(stmpe, reg); |
| 144 | mutex_unlock(&stmpe->lock); |
| 145 | |
| 146 | return ret; |
| 147 | } |
| 148 | EXPORT_SYMBOL_GPL(stmpe_reg_read); |
| 149 | |
| 150 | /** |
| 151 | * stmpe_reg_write() - write a single STMPE register |
| 152 | * @stmpe: Device to write to |
| 153 | * @reg: Register to write |
| 154 | * @val: Value to write |
| 155 | */ |
| 156 | int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) |
| 157 | { |
| 158 | int ret; |
| 159 | |
| 160 | mutex_lock(&stmpe->lock); |
| 161 | ret = __stmpe_reg_write(stmpe, reg, val); |
| 162 | mutex_unlock(&stmpe->lock); |
| 163 | |
| 164 | return ret; |
| 165 | } |
| 166 | EXPORT_SYMBOL_GPL(stmpe_reg_write); |
| 167 | |
| 168 | /** |
| 169 | * stmpe_set_bits() - set the value of a bitfield in a STMPE register |
| 170 | * @stmpe: Device to write to |
| 171 | * @reg: Register to write |
| 172 | * @mask: Mask of bits to set |
| 173 | * @val: Value to set |
| 174 | */ |
| 175 | int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) |
| 176 | { |
| 177 | int ret; |
| 178 | |
| 179 | mutex_lock(&stmpe->lock); |
| 180 | ret = __stmpe_set_bits(stmpe, reg, mask, val); |
| 181 | mutex_unlock(&stmpe->lock); |
| 182 | |
| 183 | return ret; |
| 184 | } |
| 185 | EXPORT_SYMBOL_GPL(stmpe_set_bits); |
| 186 | |
| 187 | /** |
| 188 | * stmpe_block_read() - read multiple STMPE registers |
| 189 | * @stmpe: Device to read from |
| 190 | * @reg: First register |
| 191 | * @length: Number of registers |
| 192 | * @values: Buffer to write to |
| 193 | */ |
| 194 | int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) |
| 195 | { |
| 196 | int ret; |
| 197 | |
| 198 | mutex_lock(&stmpe->lock); |
| 199 | ret = __stmpe_block_read(stmpe, reg, length, values); |
| 200 | mutex_unlock(&stmpe->lock); |
| 201 | |
| 202 | return ret; |
| 203 | } |
| 204 | EXPORT_SYMBOL_GPL(stmpe_block_read); |
| 205 | |
| 206 | /** |
| 207 | * stmpe_block_write() - write multiple STMPE registers |
| 208 | * @stmpe: Device to write to |
| 209 | * @reg: First register |
| 210 | * @length: Number of registers |
| 211 | * @values: Values to write |
| 212 | */ |
| 213 | int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, |
| 214 | const u8 *values) |
| 215 | { |
| 216 | int ret; |
| 217 | |
| 218 | mutex_lock(&stmpe->lock); |
| 219 | ret = __stmpe_block_write(stmpe, reg, length, values); |
| 220 | mutex_unlock(&stmpe->lock); |
| 221 | |
| 222 | return ret; |
| 223 | } |
| 224 | EXPORT_SYMBOL_GPL(stmpe_block_write); |
| 225 | |
| 226 | /** |
Om Prakash | 4dcaa6b | 2011-06-27 09:54:22 +0200 | [diff] [blame] | 227 | * stmpe_set_altfunc()- set the alternate function for STMPE pins |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 228 | * @stmpe: Device to configure |
| 229 | * @pins: Bitmask of pins to affect |
| 230 | * @block: block to enable alternate functions for |
| 231 | * |
| 232 | * @pins is assumed to have a bit set for each of the bits whose alternate |
| 233 | * function is to be changed, numbered according to the GPIOXY numbers. |
| 234 | * |
| 235 | * If the GPIO module is not enabled, this function automatically enables it in |
| 236 | * order to perform the change. |
| 237 | */ |
| 238 | int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block) |
| 239 | { |
| 240 | struct stmpe_variant_info *variant = stmpe->variant; |
| 241 | u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB]; |
| 242 | int af_bits = variant->af_bits; |
| 243 | int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8); |
| 244 | int afperreg = 8 / af_bits; |
| 245 | int mask = (1 << af_bits) - 1; |
| 246 | u8 regs[numregs]; |
| 247 | int af; |
| 248 | int ret; |
| 249 | |
| 250 | mutex_lock(&stmpe->lock); |
| 251 | |
| 252 | ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO); |
| 253 | if (ret < 0) |
| 254 | goto out; |
| 255 | |
| 256 | ret = __stmpe_block_read(stmpe, regaddr, numregs, regs); |
| 257 | if (ret < 0) |
| 258 | goto out; |
| 259 | |
| 260 | af = variant->get_altfunc(stmpe, block); |
| 261 | |
| 262 | while (pins) { |
| 263 | int pin = __ffs(pins); |
| 264 | int regoffset = numregs - (pin / afperreg) - 1; |
| 265 | int pos = (pin % afperreg) * (8 / afperreg); |
| 266 | |
| 267 | regs[regoffset] &= ~(mask << pos); |
| 268 | regs[regoffset] |= af << pos; |
| 269 | |
| 270 | pins &= ~(1 << pin); |
| 271 | } |
| 272 | |
| 273 | ret = __stmpe_block_write(stmpe, regaddr, numregs, regs); |
| 274 | |
| 275 | out: |
| 276 | mutex_unlock(&stmpe->lock); |
| 277 | return ret; |
| 278 | } |
| 279 | EXPORT_SYMBOL_GPL(stmpe_set_altfunc); |
| 280 | |
| 281 | /* |
| 282 | * GPIO (all variants) |
| 283 | */ |
| 284 | |
| 285 | static struct resource stmpe_gpio_resources[] = { |
| 286 | /* Start and end filled dynamically */ |
| 287 | { |
| 288 | .flags = IORESOURCE_IRQ, |
| 289 | }, |
| 290 | }; |
| 291 | |
| 292 | static struct mfd_cell stmpe_gpio_cell = { |
| 293 | .name = "stmpe-gpio", |
| 294 | .resources = stmpe_gpio_resources, |
| 295 | .num_resources = ARRAY_SIZE(stmpe_gpio_resources), |
| 296 | }; |
| 297 | |
| 298 | /* |
| 299 | * Keypad (1601, 2401, 2403) |
| 300 | */ |
| 301 | |
| 302 | static struct resource stmpe_keypad_resources[] = { |
| 303 | { |
| 304 | .name = "KEYPAD", |
| 305 | .start = 0, |
| 306 | .end = 0, |
| 307 | .flags = IORESOURCE_IRQ, |
| 308 | }, |
| 309 | { |
| 310 | .name = "KEYPAD_OVER", |
| 311 | .start = 1, |
| 312 | .end = 1, |
| 313 | .flags = IORESOURCE_IRQ, |
| 314 | }, |
| 315 | }; |
| 316 | |
| 317 | static struct mfd_cell stmpe_keypad_cell = { |
| 318 | .name = "stmpe-keypad", |
| 319 | .resources = stmpe_keypad_resources, |
| 320 | .num_resources = ARRAY_SIZE(stmpe_keypad_resources), |
| 321 | }; |
| 322 | |
| 323 | /* |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame^] | 324 | * Touchscreen (STMPE811 or STMPE610) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 325 | */ |
| 326 | |
| 327 | static struct resource stmpe_ts_resources[] = { |
| 328 | { |
| 329 | .name = "TOUCH_DET", |
| 330 | .start = 0, |
| 331 | .end = 0, |
| 332 | .flags = IORESOURCE_IRQ, |
| 333 | }, |
| 334 | { |
| 335 | .name = "FIFO_TH", |
| 336 | .start = 1, |
| 337 | .end = 1, |
| 338 | .flags = IORESOURCE_IRQ, |
| 339 | }, |
| 340 | }; |
| 341 | |
| 342 | static struct mfd_cell stmpe_ts_cell = { |
| 343 | .name = "stmpe-ts", |
| 344 | .resources = stmpe_ts_resources, |
| 345 | .num_resources = ARRAY_SIZE(stmpe_ts_resources), |
| 346 | }; |
| 347 | |
| 348 | /* |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame^] | 349 | * STMPE811 or STMPE610 |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 350 | */ |
| 351 | |
| 352 | static const u8 stmpe811_regs[] = { |
| 353 | [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID, |
| 354 | [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL, |
| 355 | [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN, |
| 356 | [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA, |
| 357 | [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA, |
| 358 | [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN, |
| 359 | [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN, |
| 360 | [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR, |
| 361 | [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE, |
| 362 | [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE, |
| 363 | [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF, |
| 364 | [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN, |
| 365 | [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA, |
| 366 | [STMPE_IDX_GPEDR_MSB] = STMPE811_REG_GPIO_ED, |
| 367 | }; |
| 368 | |
| 369 | static struct stmpe_variant_block stmpe811_blocks[] = { |
| 370 | { |
| 371 | .cell = &stmpe_gpio_cell, |
| 372 | .irq = STMPE811_IRQ_GPIOC, |
| 373 | .block = STMPE_BLOCK_GPIO, |
| 374 | }, |
| 375 | { |
| 376 | .cell = &stmpe_ts_cell, |
| 377 | .irq = STMPE811_IRQ_TOUCH_DET, |
| 378 | .block = STMPE_BLOCK_TOUCHSCREEN, |
| 379 | }, |
| 380 | }; |
| 381 | |
| 382 | static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks, |
| 383 | bool enable) |
| 384 | { |
| 385 | unsigned int mask = 0; |
| 386 | |
| 387 | if (blocks & STMPE_BLOCK_GPIO) |
| 388 | mask |= STMPE811_SYS_CTRL2_GPIO_OFF; |
| 389 | |
| 390 | if (blocks & STMPE_BLOCK_ADC) |
| 391 | mask |= STMPE811_SYS_CTRL2_ADC_OFF; |
| 392 | |
| 393 | if (blocks & STMPE_BLOCK_TOUCHSCREEN) |
| 394 | mask |= STMPE811_SYS_CTRL2_TSC_OFF; |
| 395 | |
| 396 | return __stmpe_set_bits(stmpe, STMPE811_REG_SYS_CTRL2, mask, |
| 397 | enable ? 0 : mask); |
| 398 | } |
| 399 | |
| 400 | static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 401 | { |
| 402 | /* 0 for touchscreen, 1 for GPIO */ |
| 403 | return block != STMPE_BLOCK_TOUCHSCREEN; |
| 404 | } |
| 405 | |
| 406 | static struct stmpe_variant_info stmpe811 = { |
| 407 | .name = "stmpe811", |
| 408 | .id_val = 0x0811, |
| 409 | .id_mask = 0xffff, |
| 410 | .num_gpios = 8, |
| 411 | .af_bits = 1, |
| 412 | .regs = stmpe811_regs, |
| 413 | .blocks = stmpe811_blocks, |
| 414 | .num_blocks = ARRAY_SIZE(stmpe811_blocks), |
| 415 | .num_irqs = STMPE811_NR_INTERNAL_IRQS, |
| 416 | .enable = stmpe811_enable, |
| 417 | .get_altfunc = stmpe811_get_altfunc, |
| 418 | }; |
| 419 | |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame^] | 420 | /* Similar to 811, except number of gpios */ |
| 421 | static struct stmpe_variant_info stmpe610 = { |
| 422 | .name = "stmpe610", |
| 423 | .id_val = 0x0811, |
| 424 | .id_mask = 0xffff, |
| 425 | .num_gpios = 6, |
| 426 | .af_bits = 1, |
| 427 | .regs = stmpe811_regs, |
| 428 | .blocks = stmpe811_blocks, |
| 429 | .num_blocks = ARRAY_SIZE(stmpe811_blocks), |
| 430 | .num_irqs = STMPE811_NR_INTERNAL_IRQS, |
| 431 | .enable = stmpe811_enable, |
| 432 | .get_altfunc = stmpe811_get_altfunc, |
| 433 | }; |
| 434 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 435 | /* |
| 436 | * STMPE1601 |
| 437 | */ |
| 438 | |
| 439 | static const u8 stmpe1601_regs[] = { |
| 440 | [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID, |
| 441 | [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB, |
| 442 | [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB, |
| 443 | [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB, |
| 444 | [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB, |
| 445 | [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB, |
| 446 | [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB, |
| 447 | [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB, |
| 448 | [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB, |
| 449 | [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB, |
| 450 | [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB, |
| 451 | [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB, |
| 452 | [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB, |
| 453 | [STMPE_IDX_GPEDR_MSB] = STMPE1601_REG_GPIO_ED_MSB, |
| 454 | }; |
| 455 | |
| 456 | static struct stmpe_variant_block stmpe1601_blocks[] = { |
| 457 | { |
| 458 | .cell = &stmpe_gpio_cell, |
| 459 | .irq = STMPE24XX_IRQ_GPIOC, |
| 460 | .block = STMPE_BLOCK_GPIO, |
| 461 | }, |
| 462 | { |
| 463 | .cell = &stmpe_keypad_cell, |
| 464 | .irq = STMPE24XX_IRQ_KEYPAD, |
| 465 | .block = STMPE_BLOCK_KEYPAD, |
| 466 | }, |
| 467 | }; |
| 468 | |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 469 | /* supported autosleep timeout delay (in msecs) */ |
| 470 | static const int stmpe_autosleep_delay[] = { |
| 471 | 4, 16, 32, 64, 128, 256, 512, 1024, |
| 472 | }; |
| 473 | |
| 474 | static int stmpe_round_timeout(int timeout) |
| 475 | { |
| 476 | int i; |
| 477 | |
| 478 | for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) { |
| 479 | if (stmpe_autosleep_delay[i] >= timeout) |
| 480 | return i; |
| 481 | } |
| 482 | |
| 483 | /* |
| 484 | * requests for delays longer than supported should not return the |
| 485 | * longest supported delay |
| 486 | */ |
| 487 | return -EINVAL; |
| 488 | } |
| 489 | |
| 490 | static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout) |
| 491 | { |
| 492 | int ret; |
| 493 | |
| 494 | if (!stmpe->variant->enable_autosleep) |
| 495 | return -ENOSYS; |
| 496 | |
| 497 | mutex_lock(&stmpe->lock); |
| 498 | ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout); |
| 499 | mutex_unlock(&stmpe->lock); |
| 500 | |
| 501 | return ret; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Both stmpe 1601/2403 support same layout for autosleep |
| 506 | */ |
| 507 | static int stmpe1601_autosleep(struct stmpe *stmpe, |
| 508 | int autosleep_timeout) |
| 509 | { |
| 510 | int ret, timeout; |
| 511 | |
| 512 | /* choose the best available timeout */ |
| 513 | timeout = stmpe_round_timeout(autosleep_timeout); |
| 514 | if (timeout < 0) { |
| 515 | dev_err(stmpe->dev, "invalid timeout\n"); |
| 516 | return timeout; |
| 517 | } |
| 518 | |
| 519 | ret = __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, |
| 520 | STMPE1601_AUTOSLEEP_TIMEOUT_MASK, |
| 521 | timeout); |
| 522 | if (ret < 0) |
| 523 | return ret; |
| 524 | |
| 525 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL2, |
| 526 | STPME1601_AUTOSLEEP_ENABLE, |
| 527 | STPME1601_AUTOSLEEP_ENABLE); |
| 528 | } |
| 529 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 530 | static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks, |
| 531 | bool enable) |
| 532 | { |
| 533 | unsigned int mask = 0; |
| 534 | |
| 535 | if (blocks & STMPE_BLOCK_GPIO) |
| 536 | mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO; |
| 537 | |
| 538 | if (blocks & STMPE_BLOCK_KEYPAD) |
| 539 | mask |= STMPE1601_SYS_CTRL_ENABLE_KPC; |
| 540 | |
| 541 | return __stmpe_set_bits(stmpe, STMPE1601_REG_SYS_CTRL, mask, |
| 542 | enable ? mask : 0); |
| 543 | } |
| 544 | |
| 545 | static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 546 | { |
| 547 | switch (block) { |
| 548 | case STMPE_BLOCK_PWM: |
| 549 | return 2; |
| 550 | |
| 551 | case STMPE_BLOCK_KEYPAD: |
| 552 | return 1; |
| 553 | |
| 554 | case STMPE_BLOCK_GPIO: |
| 555 | default: |
| 556 | return 0; |
| 557 | } |
| 558 | } |
| 559 | |
| 560 | static struct stmpe_variant_info stmpe1601 = { |
| 561 | .name = "stmpe1601", |
| 562 | .id_val = 0x0210, |
| 563 | .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */ |
| 564 | .num_gpios = 16, |
| 565 | .af_bits = 2, |
| 566 | .regs = stmpe1601_regs, |
| 567 | .blocks = stmpe1601_blocks, |
| 568 | .num_blocks = ARRAY_SIZE(stmpe1601_blocks), |
| 569 | .num_irqs = STMPE1601_NR_INTERNAL_IRQS, |
| 570 | .enable = stmpe1601_enable, |
| 571 | .get_altfunc = stmpe1601_get_altfunc, |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 572 | .enable_autosleep = stmpe1601_autosleep, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 573 | }; |
| 574 | |
| 575 | /* |
| 576 | * STMPE24XX |
| 577 | */ |
| 578 | |
| 579 | static const u8 stmpe24xx_regs[] = { |
| 580 | [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID, |
| 581 | [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB, |
| 582 | [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB, |
| 583 | [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB, |
| 584 | [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB, |
| 585 | [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB, |
| 586 | [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB, |
| 587 | [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB, |
| 588 | [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB, |
| 589 | [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB, |
| 590 | [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB, |
| 591 | [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB, |
| 592 | [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB, |
| 593 | [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB, |
| 594 | }; |
| 595 | |
| 596 | static struct stmpe_variant_block stmpe24xx_blocks[] = { |
| 597 | { |
| 598 | .cell = &stmpe_gpio_cell, |
| 599 | .irq = STMPE24XX_IRQ_GPIOC, |
| 600 | .block = STMPE_BLOCK_GPIO, |
| 601 | }, |
| 602 | { |
| 603 | .cell = &stmpe_keypad_cell, |
| 604 | .irq = STMPE24XX_IRQ_KEYPAD, |
| 605 | .block = STMPE_BLOCK_KEYPAD, |
| 606 | }, |
| 607 | }; |
| 608 | |
| 609 | static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks, |
| 610 | bool enable) |
| 611 | { |
| 612 | unsigned int mask = 0; |
| 613 | |
| 614 | if (blocks & STMPE_BLOCK_GPIO) |
| 615 | mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO; |
| 616 | |
| 617 | if (blocks & STMPE_BLOCK_KEYPAD) |
| 618 | mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC; |
| 619 | |
| 620 | return __stmpe_set_bits(stmpe, STMPE24XX_REG_SYS_CTRL, mask, |
| 621 | enable ? mask : 0); |
| 622 | } |
| 623 | |
| 624 | static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) |
| 625 | { |
| 626 | switch (block) { |
| 627 | case STMPE_BLOCK_ROTATOR: |
| 628 | return 2; |
| 629 | |
| 630 | case STMPE_BLOCK_KEYPAD: |
| 631 | return 1; |
| 632 | |
| 633 | case STMPE_BLOCK_GPIO: |
| 634 | default: |
| 635 | return 0; |
| 636 | } |
| 637 | } |
| 638 | |
| 639 | static struct stmpe_variant_info stmpe2401 = { |
| 640 | .name = "stmpe2401", |
| 641 | .id_val = 0x0101, |
| 642 | .id_mask = 0xffff, |
| 643 | .num_gpios = 24, |
| 644 | .af_bits = 2, |
| 645 | .regs = stmpe24xx_regs, |
| 646 | .blocks = stmpe24xx_blocks, |
| 647 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), |
| 648 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, |
| 649 | .enable = stmpe24xx_enable, |
| 650 | .get_altfunc = stmpe24xx_get_altfunc, |
| 651 | }; |
| 652 | |
| 653 | static struct stmpe_variant_info stmpe2403 = { |
| 654 | .name = "stmpe2403", |
| 655 | .id_val = 0x0120, |
| 656 | .id_mask = 0xffff, |
| 657 | .num_gpios = 24, |
| 658 | .af_bits = 2, |
| 659 | .regs = stmpe24xx_regs, |
| 660 | .blocks = stmpe24xx_blocks, |
| 661 | .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), |
| 662 | .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, |
| 663 | .enable = stmpe24xx_enable, |
| 664 | .get_altfunc = stmpe24xx_get_altfunc, |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 665 | .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */ |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 666 | }; |
| 667 | |
| 668 | static struct stmpe_variant_info *stmpe_variant_info[] = { |
Viresh Kumar | 1cda239 | 2011-11-17 11:02:22 +0530 | [diff] [blame^] | 669 | [STMPE610] = &stmpe610, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 670 | [STMPE811] = &stmpe811, |
| 671 | [STMPE1601] = &stmpe1601, |
| 672 | [STMPE2401] = &stmpe2401, |
| 673 | [STMPE2403] = &stmpe2403, |
| 674 | }; |
| 675 | |
| 676 | static irqreturn_t stmpe_irq(int irq, void *data) |
| 677 | { |
| 678 | struct stmpe *stmpe = data; |
| 679 | struct stmpe_variant_info *variant = stmpe->variant; |
| 680 | int num = DIV_ROUND_UP(variant->num_irqs, 8); |
| 681 | u8 israddr = stmpe->regs[STMPE_IDX_ISR_MSB]; |
| 682 | u8 isr[num]; |
| 683 | int ret; |
| 684 | int i; |
| 685 | |
| 686 | ret = stmpe_block_read(stmpe, israddr, num, isr); |
| 687 | if (ret < 0) |
| 688 | return IRQ_NONE; |
| 689 | |
| 690 | for (i = 0; i < num; i++) { |
| 691 | int bank = num - i - 1; |
| 692 | u8 status = isr[i]; |
| 693 | u8 clear; |
| 694 | |
| 695 | status &= stmpe->ier[bank]; |
| 696 | if (!status) |
| 697 | continue; |
| 698 | |
| 699 | clear = status; |
| 700 | while (status) { |
| 701 | int bit = __ffs(status); |
| 702 | int line = bank * 8 + bit; |
| 703 | |
| 704 | handle_nested_irq(stmpe->irq_base + line); |
| 705 | status &= ~(1 << bit); |
| 706 | } |
| 707 | |
| 708 | stmpe_reg_write(stmpe, israddr + i, clear); |
| 709 | } |
| 710 | |
| 711 | return IRQ_HANDLED; |
| 712 | } |
| 713 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 714 | static void stmpe_irq_lock(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 715 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 716 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 717 | |
| 718 | mutex_lock(&stmpe->irq_lock); |
| 719 | } |
| 720 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 721 | static void stmpe_irq_sync_unlock(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 722 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 723 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 724 | struct stmpe_variant_info *variant = stmpe->variant; |
| 725 | int num = DIV_ROUND_UP(variant->num_irqs, 8); |
| 726 | int i; |
| 727 | |
| 728 | for (i = 0; i < num; i++) { |
| 729 | u8 new = stmpe->ier[i]; |
| 730 | u8 old = stmpe->oldier[i]; |
| 731 | |
| 732 | if (new == old) |
| 733 | continue; |
| 734 | |
| 735 | stmpe->oldier[i] = new; |
| 736 | stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB] - i, new); |
| 737 | } |
| 738 | |
| 739 | mutex_unlock(&stmpe->irq_lock); |
| 740 | } |
| 741 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 742 | static void stmpe_irq_mask(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 743 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 744 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
| 745 | int offset = data->irq - stmpe->irq_base; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 746 | int regoffset = offset / 8; |
| 747 | int mask = 1 << (offset % 8); |
| 748 | |
| 749 | stmpe->ier[regoffset] &= ~mask; |
| 750 | } |
| 751 | |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 752 | static void stmpe_irq_unmask(struct irq_data *data) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 753 | { |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 754 | struct stmpe *stmpe = irq_data_get_irq_chip_data(data); |
| 755 | int offset = data->irq - stmpe->irq_base; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 756 | int regoffset = offset / 8; |
| 757 | int mask = 1 << (offset % 8); |
| 758 | |
| 759 | stmpe->ier[regoffset] |= mask; |
| 760 | } |
| 761 | |
| 762 | static struct irq_chip stmpe_irq_chip = { |
| 763 | .name = "stmpe", |
Mark Brown | 43b8c08 | 2010-12-12 12:01:08 +0000 | [diff] [blame] | 764 | .irq_bus_lock = stmpe_irq_lock, |
| 765 | .irq_bus_sync_unlock = stmpe_irq_sync_unlock, |
| 766 | .irq_mask = stmpe_irq_mask, |
| 767 | .irq_unmask = stmpe_irq_unmask, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 768 | }; |
| 769 | |
| 770 | static int __devinit stmpe_irq_init(struct stmpe *stmpe) |
| 771 | { |
| 772 | int num_irqs = stmpe->variant->num_irqs; |
| 773 | int base = stmpe->irq_base; |
| 774 | int irq; |
| 775 | |
| 776 | for (irq = base; irq < base + num_irqs; irq++) { |
Thomas Gleixner | d5bb122 | 2011-03-25 11:12:32 +0000 | [diff] [blame] | 777 | irq_set_chip_data(irq, stmpe); |
| 778 | irq_set_chip_and_handler(irq, &stmpe_irq_chip, |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 779 | handle_edge_irq); |
Thomas Gleixner | d5bb122 | 2011-03-25 11:12:32 +0000 | [diff] [blame] | 780 | irq_set_nested_thread(irq, 1); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 781 | #ifdef CONFIG_ARM |
| 782 | set_irq_flags(irq, IRQF_VALID); |
| 783 | #else |
Thomas Gleixner | d5bb122 | 2011-03-25 11:12:32 +0000 | [diff] [blame] | 784 | irq_set_noprobe(irq); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 785 | #endif |
| 786 | } |
| 787 | |
| 788 | return 0; |
| 789 | } |
| 790 | |
| 791 | static void stmpe_irq_remove(struct stmpe *stmpe) |
| 792 | { |
| 793 | int num_irqs = stmpe->variant->num_irqs; |
| 794 | int base = stmpe->irq_base; |
| 795 | int irq; |
| 796 | |
| 797 | for (irq = base; irq < base + num_irqs; irq++) { |
| 798 | #ifdef CONFIG_ARM |
| 799 | set_irq_flags(irq, 0); |
| 800 | #endif |
Thomas Gleixner | d5bb122 | 2011-03-25 11:12:32 +0000 | [diff] [blame] | 801 | irq_set_chip_and_handler(irq, NULL, NULL); |
| 802 | irq_set_chip_data(irq, NULL); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 803 | } |
| 804 | } |
| 805 | |
| 806 | static int __devinit stmpe_chip_init(struct stmpe *stmpe) |
| 807 | { |
| 808 | unsigned int irq_trigger = stmpe->pdata->irq_trigger; |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 809 | int autosleep_timeout = stmpe->pdata->autosleep_timeout; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 810 | struct stmpe_variant_info *variant = stmpe->variant; |
| 811 | u8 icr = STMPE_ICR_LSB_GIM; |
| 812 | unsigned int id; |
| 813 | u8 data[2]; |
| 814 | int ret; |
| 815 | |
| 816 | ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID], |
| 817 | ARRAY_SIZE(data), data); |
| 818 | if (ret < 0) |
| 819 | return ret; |
| 820 | |
| 821 | id = (data[0] << 8) | data[1]; |
| 822 | if ((id & variant->id_mask) != variant->id_val) { |
| 823 | dev_err(stmpe->dev, "unknown chip id: %#x\n", id); |
| 824 | return -EINVAL; |
| 825 | } |
| 826 | |
| 827 | dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id); |
| 828 | |
| 829 | /* Disable all modules -- subdrivers should enable what they need. */ |
| 830 | ret = stmpe_disable(stmpe, ~0); |
| 831 | if (ret) |
| 832 | return ret; |
| 833 | |
| 834 | if (irq_trigger == IRQF_TRIGGER_FALLING || |
| 835 | irq_trigger == IRQF_TRIGGER_RISING) |
| 836 | icr |= STMPE_ICR_LSB_EDGE; |
| 837 | |
| 838 | if (irq_trigger == IRQF_TRIGGER_RISING || |
| 839 | irq_trigger == IRQF_TRIGGER_HIGH) |
| 840 | icr |= STMPE_ICR_LSB_HIGH; |
| 841 | |
| 842 | if (stmpe->pdata->irq_invert_polarity) |
| 843 | icr ^= STMPE_ICR_LSB_HIGH; |
| 844 | |
Sundar R Iyer | 5981f4e | 2010-07-21 11:41:07 +0530 | [diff] [blame] | 845 | if (stmpe->pdata->autosleep) { |
| 846 | ret = stmpe_autosleep(stmpe, autosleep_timeout); |
| 847 | if (ret) |
| 848 | return ret; |
| 849 | } |
| 850 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 851 | return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr); |
| 852 | } |
| 853 | |
| 854 | static int __devinit stmpe_add_device(struct stmpe *stmpe, |
| 855 | struct mfd_cell *cell, int irq) |
| 856 | { |
| 857 | return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, |
| 858 | NULL, stmpe->irq_base + irq); |
| 859 | } |
| 860 | |
| 861 | static int __devinit stmpe_devices_init(struct stmpe *stmpe) |
| 862 | { |
| 863 | struct stmpe_variant_info *variant = stmpe->variant; |
| 864 | unsigned int platform_blocks = stmpe->pdata->blocks; |
| 865 | int ret = -EINVAL; |
| 866 | int i; |
| 867 | |
| 868 | for (i = 0; i < variant->num_blocks; i++) { |
| 869 | struct stmpe_variant_block *block = &variant->blocks[i]; |
| 870 | |
| 871 | if (!(platform_blocks & block->block)) |
| 872 | continue; |
| 873 | |
| 874 | platform_blocks &= ~block->block; |
| 875 | ret = stmpe_add_device(stmpe, block->cell, block->irq); |
| 876 | if (ret) |
| 877 | return ret; |
| 878 | } |
| 879 | |
| 880 | if (platform_blocks) |
| 881 | dev_warn(stmpe->dev, |
| 882 | "platform wants blocks (%#x) not present on variant", |
| 883 | platform_blocks); |
| 884 | |
| 885 | return ret; |
| 886 | } |
| 887 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 888 | /* Called from client specific probe routines */ |
| 889 | int stmpe_probe(struct stmpe_client_info *ci, int partnum) |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 890 | { |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 891 | struct stmpe_platform_data *pdata = dev_get_platdata(ci->dev); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 892 | struct stmpe *stmpe; |
| 893 | int ret; |
| 894 | |
| 895 | if (!pdata) |
| 896 | return -EINVAL; |
| 897 | |
| 898 | stmpe = kzalloc(sizeof(struct stmpe), GFP_KERNEL); |
| 899 | if (!stmpe) |
| 900 | return -ENOMEM; |
| 901 | |
| 902 | mutex_init(&stmpe->irq_lock); |
| 903 | mutex_init(&stmpe->lock); |
| 904 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 905 | stmpe->dev = ci->dev; |
| 906 | stmpe->client = ci->client; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 907 | stmpe->pdata = pdata; |
| 908 | stmpe->irq_base = pdata->irq_base; |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 909 | stmpe->ci = ci; |
| 910 | stmpe->partnum = partnum; |
| 911 | stmpe->variant = stmpe_variant_info[partnum]; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 912 | stmpe->regs = stmpe->variant->regs; |
| 913 | stmpe->num_gpios = stmpe->variant->num_gpios; |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 914 | dev_set_drvdata(stmpe->dev, stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 915 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 916 | if (ci->init) |
| 917 | ci->init(stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 918 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 919 | if (pdata->irq_over_gpio) { |
| 920 | ret = gpio_request_one(pdata->irq_gpio, GPIOF_DIR_IN, "stmpe"); |
| 921 | if (ret) { |
| 922 | dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", |
| 923 | ret); |
| 924 | goto out_free; |
| 925 | } |
| 926 | |
| 927 | stmpe->irq = gpio_to_irq(pdata->irq_gpio); |
| 928 | } else { |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 929 | stmpe->irq = ci->irq; |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 930 | } |
| 931 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 932 | ret = stmpe_chip_init(stmpe); |
| 933 | if (ret) |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 934 | goto free_gpio; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 935 | |
| 936 | ret = stmpe_irq_init(stmpe); |
| 937 | if (ret) |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 938 | goto free_gpio; |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 939 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 940 | ret = request_threaded_irq(stmpe->irq, NULL, stmpe_irq, |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 941 | pdata->irq_trigger | IRQF_ONESHOT, "stmpe", stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 942 | if (ret) { |
| 943 | dev_err(stmpe->dev, "failed to request IRQ: %d\n", ret); |
| 944 | goto out_removeirq; |
| 945 | } |
| 946 | |
| 947 | ret = stmpe_devices_init(stmpe); |
| 948 | if (ret) { |
| 949 | dev_err(stmpe->dev, "failed to add children\n"); |
| 950 | goto out_removedevs; |
| 951 | } |
| 952 | |
| 953 | return 0; |
| 954 | |
| 955 | out_removedevs: |
| 956 | mfd_remove_devices(stmpe->dev); |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 957 | free_irq(stmpe->irq, stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 958 | out_removeirq: |
| 959 | stmpe_irq_remove(stmpe); |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 960 | free_gpio: |
| 961 | if (pdata->irq_over_gpio) |
| 962 | gpio_free(pdata->irq_gpio); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 963 | out_free: |
| 964 | kfree(stmpe); |
| 965 | return ret; |
| 966 | } |
| 967 | |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 968 | int stmpe_remove(struct stmpe *stmpe) |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 969 | { |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 970 | mfd_remove_devices(stmpe->dev); |
| 971 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 972 | free_irq(stmpe->irq, stmpe); |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 973 | stmpe_irq_remove(stmpe); |
| 974 | |
Viresh Kumar | 73de16d | 2011-11-08 09:44:06 +0530 | [diff] [blame] | 975 | if (stmpe->pdata->irq_over_gpio) |
| 976 | gpio_free(stmpe->pdata->irq_gpio); |
| 977 | |
Rabin Vincent | 27e3499 | 2010-07-02 16:52:08 +0530 | [diff] [blame] | 978 | kfree(stmpe); |
| 979 | |
| 980 | return 0; |
| 981 | } |
| 982 | |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 983 | #ifdef CONFIG_PM |
Viresh Kumar | 1a6e4b7 | 2011-11-17 11:02:20 +0530 | [diff] [blame] | 984 | static int stmpe_suspend(struct device *dev) |
| 985 | { |
| 986 | struct stmpe *stmpe = dev_get_drvdata(dev); |
| 987 | |
| 988 | if (device_may_wakeup(dev)) |
| 989 | enable_irq_wake(stmpe->irq); |
| 990 | |
| 991 | return 0; |
| 992 | } |
| 993 | |
| 994 | static int stmpe_resume(struct device *dev) |
| 995 | { |
| 996 | struct stmpe *stmpe = dev_get_drvdata(dev); |
| 997 | |
| 998 | if (device_may_wakeup(dev)) |
| 999 | disable_irq_wake(stmpe->irq); |
| 1000 | |
| 1001 | return 0; |
| 1002 | } |
| 1003 | |
| 1004 | const struct dev_pm_ops stmpe_dev_pm_ops = { |
Sundar Iyer | 208c434 | 2010-09-15 10:30:54 +0530 | [diff] [blame] | 1005 | .suspend = stmpe_suspend, |
| 1006 | .resume = stmpe_resume, |
| 1007 | }; |
| 1008 | #endif |