1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ST Microelectronics MFD: stmpe's driver 4 * 5 * Copyright (C) ST-Ericsson SA 2010 6 * 7 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson 8 */ 9 10 #include <linux/err.h> 11 #include <linux/gpio.h> 12 #include <linux/export.h> 13 #include <linux/kernel.h> 14 #include <linux/interrupt.h> 15 #include <linux/irq.h> 16 #include <linux/irqdomain.h> 17 #include <linux/of.h> 18 #include <linux/of_gpio.h> 19 #include <linux/pm.h> 20 #include <linux/slab.h> 21 #include <linux/mfd/core.h> 22 #include <linux/delay.h> 23 #include <linux/regulator/consumer.h> 24 #include "stmpe.h" 25 26 /** 27 * struct stmpe_platform_data - STMPE platform data 28 * @id: device id to distinguish between multiple STMPEs on the same board 29 * @blocks: bitmask of blocks to enable (use STMPE_BLOCK_*) 30 * @irq_trigger: IRQ trigger to use for the interrupt to the host 31 * @autosleep: bool to enable/disable stmpe autosleep 32 * @autosleep_timeout: inactivity timeout in milliseconds for autosleep 33 * @irq_over_gpio: true if gpio is used to get irq 34 * @irq_gpio: gpio number over which irq will be requested (significant only if 35 * irq_over_gpio is true) 36 */ 37 struct stmpe_platform_data { 38 int id; 39 unsigned int blocks; 40 unsigned int irq_trigger; 41 bool autosleep; 42 bool irq_over_gpio; 43 int irq_gpio; 44 int autosleep_timeout; 45 }; 46 47 static int __stmpe_enable(struct stmpe *stmpe, unsigned int blocks) 48 { 49 return stmpe->variant->enable(stmpe, blocks, true); 50 } 51 52 static int __stmpe_disable(struct stmpe *stmpe, unsigned int blocks) 53 { 54 return stmpe->variant->enable(stmpe, blocks, false); 55 } 56 57 static int __stmpe_reg_read(struct stmpe *stmpe, u8 reg) 58 { 59 int ret; 60 61 ret = stmpe->ci->read_byte(stmpe, reg); 62 if (ret < 0) 63 dev_err(stmpe->dev, "failed to read reg %#x: %d\n", reg, ret); 64 65 dev_vdbg(stmpe->dev, "rd: reg %#x => data %#x\n", reg, ret); 66 67 return ret; 68 } 69 70 static int __stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) 71 { 72 int ret; 73 74 dev_vdbg(stmpe->dev, "wr: reg %#x <= %#x\n", reg, val); 75 76 ret = stmpe->ci->write_byte(stmpe, reg, val); 77 if (ret < 0) 78 dev_err(stmpe->dev, "failed to write reg %#x: %d\n", reg, ret); 79 80 return ret; 81 } 82 83 static int __stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) 84 { 85 int ret; 86 87 ret = __stmpe_reg_read(stmpe, reg); 88 if (ret < 0) 89 return ret; 90 91 ret &= ~mask; 92 ret |= val; 93 94 return __stmpe_reg_write(stmpe, reg, ret); 95 } 96 97 static int __stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, 98 u8 *values) 99 { 100 int ret; 101 102 ret = stmpe->ci->read_block(stmpe, reg, length, values); 103 if (ret < 0) 104 dev_err(stmpe->dev, "failed to read regs %#x: %d\n", reg, ret); 105 106 dev_vdbg(stmpe->dev, "rd: reg %#x (%d) => ret %#x\n", reg, length, ret); 107 stmpe_dump_bytes("stmpe rd: ", values, length); 108 109 return ret; 110 } 111 112 static int __stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, 113 const u8 *values) 114 { 115 int ret; 116 117 dev_vdbg(stmpe->dev, "wr: regs %#x (%d)\n", reg, length); 118 stmpe_dump_bytes("stmpe wr: ", values, length); 119 120 ret = stmpe->ci->write_block(stmpe, reg, length, values); 121 if (ret < 0) 122 dev_err(stmpe->dev, "failed to write regs %#x: %d\n", reg, ret); 123 124 return ret; 125 } 126 127 /** 128 * stmpe_enable - enable blocks on an STMPE device 129 * @stmpe: Device to work on 130 * @blocks: Mask of blocks (enum stmpe_block values) to enable 131 */ 132 int stmpe_enable(struct stmpe *stmpe, unsigned int blocks) 133 { 134 int ret; 135 136 mutex_lock(&stmpe->lock); 137 ret = __stmpe_enable(stmpe, blocks); 138 mutex_unlock(&stmpe->lock); 139 140 return ret; 141 } 142 EXPORT_SYMBOL_GPL(stmpe_enable); 143 144 /** 145 * stmpe_disable - disable blocks on an STMPE device 146 * @stmpe: Device to work on 147 * @blocks: Mask of blocks (enum stmpe_block values) to enable 148 */ 149 int stmpe_disable(struct stmpe *stmpe, unsigned int blocks) 150 { 151 int ret; 152 153 mutex_lock(&stmpe->lock); 154 ret = __stmpe_disable(stmpe, blocks); 155 mutex_unlock(&stmpe->lock); 156 157 return ret; 158 } 159 EXPORT_SYMBOL_GPL(stmpe_disable); 160 161 /** 162 * stmpe_reg_read() - read a single STMPE register 163 * @stmpe: Device to read from 164 * @reg: Register to read 165 */ 166 int stmpe_reg_read(struct stmpe *stmpe, u8 reg) 167 { 168 int ret; 169 170 mutex_lock(&stmpe->lock); 171 ret = __stmpe_reg_read(stmpe, reg); 172 mutex_unlock(&stmpe->lock); 173 174 return ret; 175 } 176 EXPORT_SYMBOL_GPL(stmpe_reg_read); 177 178 /** 179 * stmpe_reg_write() - write a single STMPE register 180 * @stmpe: Device to write to 181 * @reg: Register to write 182 * @val: Value to write 183 */ 184 int stmpe_reg_write(struct stmpe *stmpe, u8 reg, u8 val) 185 { 186 int ret; 187 188 mutex_lock(&stmpe->lock); 189 ret = __stmpe_reg_write(stmpe, reg, val); 190 mutex_unlock(&stmpe->lock); 191 192 return ret; 193 } 194 EXPORT_SYMBOL_GPL(stmpe_reg_write); 195 196 /** 197 * stmpe_set_bits() - set the value of a bitfield in a STMPE register 198 * @stmpe: Device to write to 199 * @reg: Register to write 200 * @mask: Mask of bits to set 201 * @val: Value to set 202 */ 203 int stmpe_set_bits(struct stmpe *stmpe, u8 reg, u8 mask, u8 val) 204 { 205 int ret; 206 207 mutex_lock(&stmpe->lock); 208 ret = __stmpe_set_bits(stmpe, reg, mask, val); 209 mutex_unlock(&stmpe->lock); 210 211 return ret; 212 } 213 EXPORT_SYMBOL_GPL(stmpe_set_bits); 214 215 /** 216 * stmpe_block_read() - read multiple STMPE registers 217 * @stmpe: Device to read from 218 * @reg: First register 219 * @length: Number of registers 220 * @values: Buffer to write to 221 */ 222 int stmpe_block_read(struct stmpe *stmpe, u8 reg, u8 length, u8 *values) 223 { 224 int ret; 225 226 mutex_lock(&stmpe->lock); 227 ret = __stmpe_block_read(stmpe, reg, length, values); 228 mutex_unlock(&stmpe->lock); 229 230 return ret; 231 } 232 EXPORT_SYMBOL_GPL(stmpe_block_read); 233 234 /** 235 * stmpe_block_write() - write multiple STMPE registers 236 * @stmpe: Device to write to 237 * @reg: First register 238 * @length: Number of registers 239 * @values: Values to write 240 */ 241 int stmpe_block_write(struct stmpe *stmpe, u8 reg, u8 length, 242 const u8 *values) 243 { 244 int ret; 245 246 mutex_lock(&stmpe->lock); 247 ret = __stmpe_block_write(stmpe, reg, length, values); 248 mutex_unlock(&stmpe->lock); 249 250 return ret; 251 } 252 EXPORT_SYMBOL_GPL(stmpe_block_write); 253 254 /** 255 * stmpe_set_altfunc()- set the alternate function for STMPE pins 256 * @stmpe: Device to configure 257 * @pins: Bitmask of pins to affect 258 * @block: block to enable alternate functions for 259 * 260 * @pins is assumed to have a bit set for each of the bits whose alternate 261 * function is to be changed, numbered according to the GPIOXY numbers. 262 * 263 * If the GPIO module is not enabled, this function automatically enables it in 264 * order to perform the change. 265 */ 266 int stmpe_set_altfunc(struct stmpe *stmpe, u32 pins, enum stmpe_block block) 267 { 268 struct stmpe_variant_info *variant = stmpe->variant; 269 u8 regaddr = stmpe->regs[STMPE_IDX_GPAFR_U_MSB]; 270 int af_bits = variant->af_bits; 271 int numregs = DIV_ROUND_UP(stmpe->num_gpios * af_bits, 8); 272 int mask = (1 << af_bits) - 1; 273 u8 regs[8]; 274 int af, afperreg, ret; 275 276 if (!variant->get_altfunc) 277 return 0; 278 279 afperreg = 8 / af_bits; 280 mutex_lock(&stmpe->lock); 281 282 ret = __stmpe_enable(stmpe, STMPE_BLOCK_GPIO); 283 if (ret < 0) 284 goto out; 285 286 ret = __stmpe_block_read(stmpe, regaddr, numregs, regs); 287 if (ret < 0) 288 goto out; 289 290 af = variant->get_altfunc(stmpe, block); 291 292 while (pins) { 293 int pin = __ffs(pins); 294 int regoffset = numregs - (pin / afperreg) - 1; 295 int pos = (pin % afperreg) * (8 / afperreg); 296 297 regs[regoffset] &= ~(mask << pos); 298 regs[regoffset] |= af << pos; 299 300 pins &= ~(1 << pin); 301 } 302 303 ret = __stmpe_block_write(stmpe, regaddr, numregs, regs); 304 305 out: 306 mutex_unlock(&stmpe->lock); 307 return ret; 308 } 309 EXPORT_SYMBOL_GPL(stmpe_set_altfunc); 310 311 /* 312 * GPIO (all variants) 313 */ 314 315 static struct resource stmpe_gpio_resources[] = { 316 /* Start and end filled dynamically */ 317 { 318 .flags = IORESOURCE_IRQ, 319 }, 320 }; 321 322 static const struct mfd_cell stmpe_gpio_cell = { 323 .name = "stmpe-gpio", 324 .of_compatible = "st,stmpe-gpio", 325 .resources = stmpe_gpio_resources, 326 .num_resources = ARRAY_SIZE(stmpe_gpio_resources), 327 }; 328 329 static const struct mfd_cell stmpe_gpio_cell_noirq = { 330 .name = "stmpe-gpio", 331 .of_compatible = "st,stmpe-gpio", 332 /* gpio cell resources consist of an irq only so no resources here */ 333 }; 334 335 /* 336 * Keypad (1601, 2401, 2403) 337 */ 338 339 static struct resource stmpe_keypad_resources[] = { 340 /* Start and end filled dynamically */ 341 { 342 .name = "KEYPAD", 343 .flags = IORESOURCE_IRQ, 344 }, 345 { 346 .name = "KEYPAD_OVER", 347 .flags = IORESOURCE_IRQ, 348 }, 349 }; 350 351 static const struct mfd_cell stmpe_keypad_cell = { 352 .name = "stmpe-keypad", 353 .of_compatible = "st,stmpe-keypad", 354 .resources = stmpe_keypad_resources, 355 .num_resources = ARRAY_SIZE(stmpe_keypad_resources), 356 }; 357 358 /* 359 * PWM (1601, 2401, 2403) 360 */ 361 static struct resource stmpe_pwm_resources[] = { 362 /* Start and end filled dynamically */ 363 { 364 .name = "PWM0", 365 .flags = IORESOURCE_IRQ, 366 }, 367 { 368 .name = "PWM1", 369 .flags = IORESOURCE_IRQ, 370 }, 371 { 372 .name = "PWM2", 373 .flags = IORESOURCE_IRQ, 374 }, 375 }; 376 377 static const struct mfd_cell stmpe_pwm_cell = { 378 .name = "stmpe-pwm", 379 .of_compatible = "st,stmpe-pwm", 380 .resources = stmpe_pwm_resources, 381 .num_resources = ARRAY_SIZE(stmpe_pwm_resources), 382 }; 383 384 /* 385 * STMPE801 386 */ 387 static const u8 stmpe801_regs[] = { 388 [STMPE_IDX_CHIP_ID] = STMPE801_REG_CHIP_ID, 389 [STMPE_IDX_ICR_LSB] = STMPE801_REG_SYS_CTRL, 390 [STMPE_IDX_GPMR_LSB] = STMPE801_REG_GPIO_MP_STA, 391 [STMPE_IDX_GPSR_LSB] = STMPE801_REG_GPIO_SET_PIN, 392 [STMPE_IDX_GPCR_LSB] = STMPE801_REG_GPIO_SET_PIN, 393 [STMPE_IDX_GPDR_LSB] = STMPE801_REG_GPIO_DIR, 394 [STMPE_IDX_IEGPIOR_LSB] = STMPE801_REG_GPIO_INT_EN, 395 [STMPE_IDX_ISGPIOR_MSB] = STMPE801_REG_GPIO_INT_STA, 396 397 }; 398 399 static struct stmpe_variant_block stmpe801_blocks[] = { 400 { 401 .cell = &stmpe_gpio_cell, 402 .irq = 0, 403 .block = STMPE_BLOCK_GPIO, 404 }, 405 }; 406 407 static struct stmpe_variant_block stmpe801_blocks_noirq[] = { 408 { 409 .cell = &stmpe_gpio_cell_noirq, 410 .block = STMPE_BLOCK_GPIO, 411 }, 412 }; 413 414 static int stmpe801_enable(struct stmpe *stmpe, unsigned int blocks, 415 bool enable) 416 { 417 if (blocks & STMPE_BLOCK_GPIO) 418 return 0; 419 else 420 return -EINVAL; 421 } 422 423 static struct stmpe_variant_info stmpe801 = { 424 .name = "stmpe801", 425 .id_val = STMPE801_ID, 426 .id_mask = 0xffff, 427 .num_gpios = 8, 428 .regs = stmpe801_regs, 429 .blocks = stmpe801_blocks, 430 .num_blocks = ARRAY_SIZE(stmpe801_blocks), 431 .num_irqs = STMPE801_NR_INTERNAL_IRQS, 432 .enable = stmpe801_enable, 433 }; 434 435 static struct stmpe_variant_info stmpe801_noirq = { 436 .name = "stmpe801", 437 .id_val = STMPE801_ID, 438 .id_mask = 0xffff, 439 .num_gpios = 8, 440 .regs = stmpe801_regs, 441 .blocks = stmpe801_blocks_noirq, 442 .num_blocks = ARRAY_SIZE(stmpe801_blocks_noirq), 443 .enable = stmpe801_enable, 444 }; 445 446 /* 447 * Touchscreen (STMPE811 or STMPE610) 448 */ 449 450 static struct resource stmpe_ts_resources[] = { 451 /* Start and end filled dynamically */ 452 { 453 .name = "TOUCH_DET", 454 .flags = IORESOURCE_IRQ, 455 }, 456 { 457 .name = "FIFO_TH", 458 .flags = IORESOURCE_IRQ, 459 }, 460 }; 461 462 static const struct mfd_cell stmpe_ts_cell = { 463 .name = "stmpe-ts", 464 .of_compatible = "st,stmpe-ts", 465 .resources = stmpe_ts_resources, 466 .num_resources = ARRAY_SIZE(stmpe_ts_resources), 467 }; 468 469 /* 470 * ADC (STMPE811) 471 */ 472 473 static struct resource stmpe_adc_resources[] = { 474 /* Start and end filled dynamically */ 475 { 476 .name = "STMPE_TEMP_SENS", 477 .flags = IORESOURCE_IRQ, 478 }, 479 { 480 .name = "STMPE_ADC", 481 .flags = IORESOURCE_IRQ, 482 }, 483 }; 484 485 static const struct mfd_cell stmpe_adc_cell = { 486 .name = "stmpe-adc", 487 .of_compatible = "st,stmpe-adc", 488 .resources = stmpe_adc_resources, 489 .num_resources = ARRAY_SIZE(stmpe_adc_resources), 490 }; 491 492 /* 493 * STMPE811 or STMPE610 494 */ 495 496 static const u8 stmpe811_regs[] = { 497 [STMPE_IDX_CHIP_ID] = STMPE811_REG_CHIP_ID, 498 [STMPE_IDX_SYS_CTRL] = STMPE811_REG_SYS_CTRL, 499 [STMPE_IDX_SYS_CTRL2] = STMPE811_REG_SYS_CTRL2, 500 [STMPE_IDX_ICR_LSB] = STMPE811_REG_INT_CTRL, 501 [STMPE_IDX_IER_LSB] = STMPE811_REG_INT_EN, 502 [STMPE_IDX_ISR_MSB] = STMPE811_REG_INT_STA, 503 [STMPE_IDX_GPMR_LSB] = STMPE811_REG_GPIO_MP_STA, 504 [STMPE_IDX_GPSR_LSB] = STMPE811_REG_GPIO_SET_PIN, 505 [STMPE_IDX_GPCR_LSB] = STMPE811_REG_GPIO_CLR_PIN, 506 [STMPE_IDX_GPDR_LSB] = STMPE811_REG_GPIO_DIR, 507 [STMPE_IDX_GPRER_LSB] = STMPE811_REG_GPIO_RE, 508 [STMPE_IDX_GPFER_LSB] = STMPE811_REG_GPIO_FE, 509 [STMPE_IDX_GPAFR_U_MSB] = STMPE811_REG_GPIO_AF, 510 [STMPE_IDX_IEGPIOR_LSB] = STMPE811_REG_GPIO_INT_EN, 511 [STMPE_IDX_ISGPIOR_MSB] = STMPE811_REG_GPIO_INT_STA, 512 [STMPE_IDX_GPEDR_LSB] = STMPE811_REG_GPIO_ED, 513 }; 514 515 static struct stmpe_variant_block stmpe811_blocks[] = { 516 { 517 .cell = &stmpe_gpio_cell, 518 .irq = STMPE811_IRQ_GPIOC, 519 .block = STMPE_BLOCK_GPIO, 520 }, 521 { 522 .cell = &stmpe_ts_cell, 523 .irq = STMPE811_IRQ_TOUCH_DET, 524 .block = STMPE_BLOCK_TOUCHSCREEN, 525 }, 526 { 527 .cell = &stmpe_adc_cell, 528 .irq = STMPE811_IRQ_TEMP_SENS, 529 .block = STMPE_BLOCK_ADC, 530 }, 531 }; 532 533 static int stmpe811_enable(struct stmpe *stmpe, unsigned int blocks, 534 bool enable) 535 { 536 unsigned int mask = 0; 537 538 if (blocks & STMPE_BLOCK_GPIO) 539 mask |= STMPE811_SYS_CTRL2_GPIO_OFF; 540 541 if (blocks & STMPE_BLOCK_ADC) 542 mask |= STMPE811_SYS_CTRL2_ADC_OFF; 543 544 if (blocks & STMPE_BLOCK_TOUCHSCREEN) 545 mask |= STMPE811_SYS_CTRL2_TSC_OFF; 546 547 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], mask, 548 enable ? 0 : mask); 549 } 550 551 int stmpe811_adc_common_init(struct stmpe *stmpe) 552 { 553 int ret; 554 u8 adc_ctrl1, adc_ctrl1_mask; 555 556 adc_ctrl1 = STMPE_SAMPLE_TIME(stmpe->sample_time) | 557 STMPE_MOD_12B(stmpe->mod_12b) | 558 STMPE_REF_SEL(stmpe->ref_sel); 559 adc_ctrl1_mask = STMPE_SAMPLE_TIME(0xff) | STMPE_MOD_12B(0xff) | 560 STMPE_REF_SEL(0xff); 561 562 ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL1, 563 adc_ctrl1_mask, adc_ctrl1); 564 if (ret) { 565 dev_err(stmpe->dev, "Could not setup ADC\n"); 566 return ret; 567 } 568 569 ret = stmpe_set_bits(stmpe, STMPE811_REG_ADC_CTRL2, 570 STMPE_ADC_FREQ(0xff), STMPE_ADC_FREQ(stmpe->adc_freq)); 571 if (ret) { 572 dev_err(stmpe->dev, "Could not setup ADC\n"); 573 return ret; 574 } 575 576 return 0; 577 } 578 EXPORT_SYMBOL_GPL(stmpe811_adc_common_init); 579 580 static int stmpe811_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) 581 { 582 /* 0 for touchscreen, 1 for GPIO */ 583 return block != STMPE_BLOCK_TOUCHSCREEN; 584 } 585 586 static struct stmpe_variant_info stmpe811 = { 587 .name = "stmpe811", 588 .id_val = 0x0811, 589 .id_mask = 0xffff, 590 .num_gpios = 8, 591 .af_bits = 1, 592 .regs = stmpe811_regs, 593 .blocks = stmpe811_blocks, 594 .num_blocks = ARRAY_SIZE(stmpe811_blocks), 595 .num_irqs = STMPE811_NR_INTERNAL_IRQS, 596 .enable = stmpe811_enable, 597 .get_altfunc = stmpe811_get_altfunc, 598 }; 599 600 /* Similar to 811, except number of gpios */ 601 static struct stmpe_variant_info stmpe610 = { 602 .name = "stmpe610", 603 .id_val = 0x0811, 604 .id_mask = 0xffff, 605 .num_gpios = 6, 606 .af_bits = 1, 607 .regs = stmpe811_regs, 608 .blocks = stmpe811_blocks, 609 .num_blocks = ARRAY_SIZE(stmpe811_blocks), 610 .num_irqs = STMPE811_NR_INTERNAL_IRQS, 611 .enable = stmpe811_enable, 612 .get_altfunc = stmpe811_get_altfunc, 613 }; 614 615 /* 616 * STMPE1600 617 * Compared to all others STMPE variant, LSB and MSB regs are located in this 618 * order : LSB addr 619 * MSB addr + 1 620 * As there is only 2 * 8bits registers for GPMR/GPSR/IEGPIOPR, CSB index is MSB registers 621 */ 622 623 static const u8 stmpe1600_regs[] = { 624 [STMPE_IDX_CHIP_ID] = STMPE1600_REG_CHIP_ID, 625 [STMPE_IDX_SYS_CTRL] = STMPE1600_REG_SYS_CTRL, 626 [STMPE_IDX_ICR_LSB] = STMPE1600_REG_SYS_CTRL, 627 [STMPE_IDX_GPMR_LSB] = STMPE1600_REG_GPMR_LSB, 628 [STMPE_IDX_GPMR_CSB] = STMPE1600_REG_GPMR_MSB, 629 [STMPE_IDX_GPSR_LSB] = STMPE1600_REG_GPSR_LSB, 630 [STMPE_IDX_GPSR_CSB] = STMPE1600_REG_GPSR_MSB, 631 [STMPE_IDX_GPCR_LSB] = STMPE1600_REG_GPSR_LSB, 632 [STMPE_IDX_GPCR_CSB] = STMPE1600_REG_GPSR_MSB, 633 [STMPE_IDX_GPDR_LSB] = STMPE1600_REG_GPDR_LSB, 634 [STMPE_IDX_GPDR_CSB] = STMPE1600_REG_GPDR_MSB, 635 [STMPE_IDX_IEGPIOR_LSB] = STMPE1600_REG_IEGPIOR_LSB, 636 [STMPE_IDX_IEGPIOR_CSB] = STMPE1600_REG_IEGPIOR_MSB, 637 [STMPE_IDX_ISGPIOR_LSB] = STMPE1600_REG_ISGPIOR_LSB, 638 }; 639 640 static struct stmpe_variant_block stmpe1600_blocks[] = { 641 { 642 .cell = &stmpe_gpio_cell, 643 .irq = 0, 644 .block = STMPE_BLOCK_GPIO, 645 }, 646 }; 647 648 static int stmpe1600_enable(struct stmpe *stmpe, unsigned int blocks, 649 bool enable) 650 { 651 if (blocks & STMPE_BLOCK_GPIO) 652 return 0; 653 else 654 return -EINVAL; 655 } 656 657 static struct stmpe_variant_info stmpe1600 = { 658 .name = "stmpe1600", 659 .id_val = STMPE1600_ID, 660 .id_mask = 0xffff, 661 .num_gpios = 16, 662 .af_bits = 0, 663 .regs = stmpe1600_regs, 664 .blocks = stmpe1600_blocks, 665 .num_blocks = ARRAY_SIZE(stmpe1600_blocks), 666 .num_irqs = STMPE1600_NR_INTERNAL_IRQS, 667 .enable = stmpe1600_enable, 668 }; 669 670 /* 671 * STMPE1601 672 */ 673 674 static const u8 stmpe1601_regs[] = { 675 [STMPE_IDX_CHIP_ID] = STMPE1601_REG_CHIP_ID, 676 [STMPE_IDX_SYS_CTRL] = STMPE1601_REG_SYS_CTRL, 677 [STMPE_IDX_SYS_CTRL2] = STMPE1601_REG_SYS_CTRL2, 678 [STMPE_IDX_ICR_LSB] = STMPE1601_REG_ICR_LSB, 679 [STMPE_IDX_IER_MSB] = STMPE1601_REG_IER_MSB, 680 [STMPE_IDX_IER_LSB] = STMPE1601_REG_IER_LSB, 681 [STMPE_IDX_ISR_MSB] = STMPE1601_REG_ISR_MSB, 682 [STMPE_IDX_GPMR_LSB] = STMPE1601_REG_GPIO_MP_LSB, 683 [STMPE_IDX_GPMR_CSB] = STMPE1601_REG_GPIO_MP_MSB, 684 [STMPE_IDX_GPSR_LSB] = STMPE1601_REG_GPIO_SET_LSB, 685 [STMPE_IDX_GPSR_CSB] = STMPE1601_REG_GPIO_SET_MSB, 686 [STMPE_IDX_GPCR_LSB] = STMPE1601_REG_GPIO_CLR_LSB, 687 [STMPE_IDX_GPCR_CSB] = STMPE1601_REG_GPIO_CLR_MSB, 688 [STMPE_IDX_GPDR_LSB] = STMPE1601_REG_GPIO_SET_DIR_LSB, 689 [STMPE_IDX_GPDR_CSB] = STMPE1601_REG_GPIO_SET_DIR_MSB, 690 [STMPE_IDX_GPEDR_LSB] = STMPE1601_REG_GPIO_ED_LSB, 691 [STMPE_IDX_GPEDR_CSB] = STMPE1601_REG_GPIO_ED_MSB, 692 [STMPE_IDX_GPRER_LSB] = STMPE1601_REG_GPIO_RE_LSB, 693 [STMPE_IDX_GPRER_CSB] = STMPE1601_REG_GPIO_RE_MSB, 694 [STMPE_IDX_GPFER_LSB] = STMPE1601_REG_GPIO_FE_LSB, 695 [STMPE_IDX_GPFER_CSB] = STMPE1601_REG_GPIO_FE_MSB, 696 [STMPE_IDX_GPPUR_LSB] = STMPE1601_REG_GPIO_PU_LSB, 697 [STMPE_IDX_GPAFR_U_MSB] = STMPE1601_REG_GPIO_AF_U_MSB, 698 [STMPE_IDX_IEGPIOR_LSB] = STMPE1601_REG_INT_EN_GPIO_MASK_LSB, 699 [STMPE_IDX_IEGPIOR_CSB] = STMPE1601_REG_INT_EN_GPIO_MASK_MSB, 700 [STMPE_IDX_ISGPIOR_MSB] = STMPE1601_REG_INT_STA_GPIO_MSB, 701 }; 702 703 static struct stmpe_variant_block stmpe1601_blocks[] = { 704 { 705 .cell = &stmpe_gpio_cell, 706 .irq = STMPE1601_IRQ_GPIOC, 707 .block = STMPE_BLOCK_GPIO, 708 }, 709 { 710 .cell = &stmpe_keypad_cell, 711 .irq = STMPE1601_IRQ_KEYPAD, 712 .block = STMPE_BLOCK_KEYPAD, 713 }, 714 { 715 .cell = &stmpe_pwm_cell, 716 .irq = STMPE1601_IRQ_PWM0, 717 .block = STMPE_BLOCK_PWM, 718 }, 719 }; 720 721 /* supported autosleep timeout delay (in msecs) */ 722 static const int stmpe_autosleep_delay[] = { 723 4, 16, 32, 64, 128, 256, 512, 1024, 724 }; 725 726 static int stmpe_round_timeout(int timeout) 727 { 728 int i; 729 730 for (i = 0; i < ARRAY_SIZE(stmpe_autosleep_delay); i++) { 731 if (stmpe_autosleep_delay[i] >= timeout) 732 return i; 733 } 734 735 /* 736 * requests for delays longer than supported should not return the 737 * longest supported delay 738 */ 739 return -EINVAL; 740 } 741 742 static int stmpe_autosleep(struct stmpe *stmpe, int autosleep_timeout) 743 { 744 int ret; 745 746 if (!stmpe->variant->enable_autosleep) 747 return -ENOSYS; 748 749 mutex_lock(&stmpe->lock); 750 ret = stmpe->variant->enable_autosleep(stmpe, autosleep_timeout); 751 mutex_unlock(&stmpe->lock); 752 753 return ret; 754 } 755 756 /* 757 * Both stmpe 1601/2403 support same layout for autosleep 758 */ 759 static int stmpe1601_autosleep(struct stmpe *stmpe, 760 int autosleep_timeout) 761 { 762 int ret, timeout; 763 764 /* choose the best available timeout */ 765 timeout = stmpe_round_timeout(autosleep_timeout); 766 if (timeout < 0) { 767 dev_err(stmpe->dev, "invalid timeout\n"); 768 return timeout; 769 } 770 771 ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], 772 STMPE1601_AUTOSLEEP_TIMEOUT_MASK, 773 timeout); 774 if (ret < 0) 775 return ret; 776 777 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL2], 778 STPME1601_AUTOSLEEP_ENABLE, 779 STPME1601_AUTOSLEEP_ENABLE); 780 } 781 782 static int stmpe1601_enable(struct stmpe *stmpe, unsigned int blocks, 783 bool enable) 784 { 785 unsigned int mask = 0; 786 787 if (blocks & STMPE_BLOCK_GPIO) 788 mask |= STMPE1601_SYS_CTRL_ENABLE_GPIO; 789 else 790 mask &= ~STMPE1601_SYS_CTRL_ENABLE_GPIO; 791 792 if (blocks & STMPE_BLOCK_KEYPAD) 793 mask |= STMPE1601_SYS_CTRL_ENABLE_KPC; 794 else 795 mask &= ~STMPE1601_SYS_CTRL_ENABLE_KPC; 796 797 if (blocks & STMPE_BLOCK_PWM) 798 mask |= STMPE1601_SYS_CTRL_ENABLE_SPWM; 799 else 800 mask &= ~STMPE1601_SYS_CTRL_ENABLE_SPWM; 801 802 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask, 803 enable ? mask : 0); 804 } 805 806 static int stmpe1601_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) 807 { 808 switch (block) { 809 case STMPE_BLOCK_PWM: 810 return 2; 811 812 case STMPE_BLOCK_KEYPAD: 813 return 1; 814 815 case STMPE_BLOCK_GPIO: 816 default: 817 return 0; 818 } 819 } 820 821 static struct stmpe_variant_info stmpe1601 = { 822 .name = "stmpe1601", 823 .id_val = 0x0210, 824 .id_mask = 0xfff0, /* at least 0x0210 and 0x0212 */ 825 .num_gpios = 16, 826 .af_bits = 2, 827 .regs = stmpe1601_regs, 828 .blocks = stmpe1601_blocks, 829 .num_blocks = ARRAY_SIZE(stmpe1601_blocks), 830 .num_irqs = STMPE1601_NR_INTERNAL_IRQS, 831 .enable = stmpe1601_enable, 832 .get_altfunc = stmpe1601_get_altfunc, 833 .enable_autosleep = stmpe1601_autosleep, 834 }; 835 836 /* 837 * STMPE1801 838 */ 839 static const u8 stmpe1801_regs[] = { 840 [STMPE_IDX_CHIP_ID] = STMPE1801_REG_CHIP_ID, 841 [STMPE_IDX_SYS_CTRL] = STMPE1801_REG_SYS_CTRL, 842 [STMPE_IDX_ICR_LSB] = STMPE1801_REG_INT_CTRL_LOW, 843 [STMPE_IDX_IER_LSB] = STMPE1801_REG_INT_EN_MASK_LOW, 844 [STMPE_IDX_ISR_LSB] = STMPE1801_REG_INT_STA_LOW, 845 [STMPE_IDX_GPMR_LSB] = STMPE1801_REG_GPIO_MP_LOW, 846 [STMPE_IDX_GPMR_CSB] = STMPE1801_REG_GPIO_MP_MID, 847 [STMPE_IDX_GPMR_MSB] = STMPE1801_REG_GPIO_MP_HIGH, 848 [STMPE_IDX_GPSR_LSB] = STMPE1801_REG_GPIO_SET_LOW, 849 [STMPE_IDX_GPSR_CSB] = STMPE1801_REG_GPIO_SET_MID, 850 [STMPE_IDX_GPSR_MSB] = STMPE1801_REG_GPIO_SET_HIGH, 851 [STMPE_IDX_GPCR_LSB] = STMPE1801_REG_GPIO_CLR_LOW, 852 [STMPE_IDX_GPCR_CSB] = STMPE1801_REG_GPIO_CLR_MID, 853 [STMPE_IDX_GPCR_MSB] = STMPE1801_REG_GPIO_CLR_HIGH, 854 [STMPE_IDX_GPDR_LSB] = STMPE1801_REG_GPIO_SET_DIR_LOW, 855 [STMPE_IDX_GPDR_CSB] = STMPE1801_REG_GPIO_SET_DIR_MID, 856 [STMPE_IDX_GPDR_MSB] = STMPE1801_REG_GPIO_SET_DIR_HIGH, 857 [STMPE_IDX_GPRER_LSB] = STMPE1801_REG_GPIO_RE_LOW, 858 [STMPE_IDX_GPRER_CSB] = STMPE1801_REG_GPIO_RE_MID, 859 [STMPE_IDX_GPRER_MSB] = STMPE1801_REG_GPIO_RE_HIGH, 860 [STMPE_IDX_GPFER_LSB] = STMPE1801_REG_GPIO_FE_LOW, 861 [STMPE_IDX_GPFER_CSB] = STMPE1801_REG_GPIO_FE_MID, 862 [STMPE_IDX_GPFER_MSB] = STMPE1801_REG_GPIO_FE_HIGH, 863 [STMPE_IDX_GPPUR_LSB] = STMPE1801_REG_GPIO_PULL_UP_LOW, 864 [STMPE_IDX_IEGPIOR_LSB] = STMPE1801_REG_INT_EN_GPIO_MASK_LOW, 865 [STMPE_IDX_IEGPIOR_CSB] = STMPE1801_REG_INT_EN_GPIO_MASK_MID, 866 [STMPE_IDX_IEGPIOR_MSB] = STMPE1801_REG_INT_EN_GPIO_MASK_HIGH, 867 [STMPE_IDX_ISGPIOR_MSB] = STMPE1801_REG_INT_STA_GPIO_HIGH, 868 }; 869 870 static struct stmpe_variant_block stmpe1801_blocks[] = { 871 { 872 .cell = &stmpe_gpio_cell, 873 .irq = STMPE1801_IRQ_GPIOC, 874 .block = STMPE_BLOCK_GPIO, 875 }, 876 { 877 .cell = &stmpe_keypad_cell, 878 .irq = STMPE1801_IRQ_KEYPAD, 879 .block = STMPE_BLOCK_KEYPAD, 880 }, 881 }; 882 883 static int stmpe1801_enable(struct stmpe *stmpe, unsigned int blocks, 884 bool enable) 885 { 886 unsigned int mask = 0; 887 if (blocks & STMPE_BLOCK_GPIO) 888 mask |= STMPE1801_MSK_INT_EN_GPIO; 889 890 if (blocks & STMPE_BLOCK_KEYPAD) 891 mask |= STMPE1801_MSK_INT_EN_KPC; 892 893 return __stmpe_set_bits(stmpe, STMPE1801_REG_INT_EN_MASK_LOW, mask, 894 enable ? mask : 0); 895 } 896 897 static int stmpe_reset(struct stmpe *stmpe) 898 { 899 u16 id_val = stmpe->variant->id_val; 900 unsigned long timeout; 901 int ret = 0; 902 u8 reset_bit; 903 904 if (id_val == STMPE811_ID) 905 /* STMPE801 and STMPE610 use bit 1 of SYS_CTRL register */ 906 reset_bit = STMPE811_SYS_CTRL_RESET; 907 else 908 /* all other STMPE variant use bit 7 of SYS_CTRL register */ 909 reset_bit = STMPE_SYS_CTRL_RESET; 910 911 ret = __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], 912 reset_bit, reset_bit); 913 if (ret < 0) 914 return ret; 915 916 msleep(10); 917 918 timeout = jiffies + msecs_to_jiffies(100); 919 while (time_before(jiffies, timeout)) { 920 ret = __stmpe_reg_read(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL]); 921 if (ret < 0) 922 return ret; 923 if (!(ret & reset_bit)) 924 return 0; 925 usleep_range(100, 200); 926 } 927 return -EIO; 928 } 929 930 static struct stmpe_variant_info stmpe1801 = { 931 .name = "stmpe1801", 932 .id_val = STMPE1801_ID, 933 .id_mask = 0xfff0, 934 .num_gpios = 18, 935 .af_bits = 0, 936 .regs = stmpe1801_regs, 937 .blocks = stmpe1801_blocks, 938 .num_blocks = ARRAY_SIZE(stmpe1801_blocks), 939 .num_irqs = STMPE1801_NR_INTERNAL_IRQS, 940 .enable = stmpe1801_enable, 941 /* stmpe1801 do not have any gpio alternate function */ 942 .get_altfunc = NULL, 943 }; 944 945 /* 946 * STMPE24XX 947 */ 948 949 static const u8 stmpe24xx_regs[] = { 950 [STMPE_IDX_CHIP_ID] = STMPE24XX_REG_CHIP_ID, 951 [STMPE_IDX_SYS_CTRL] = STMPE24XX_REG_SYS_CTRL, 952 [STMPE_IDX_SYS_CTRL2] = STMPE24XX_REG_SYS_CTRL2, 953 [STMPE_IDX_ICR_LSB] = STMPE24XX_REG_ICR_LSB, 954 [STMPE_IDX_IER_MSB] = STMPE24XX_REG_IER_MSB, 955 [STMPE_IDX_IER_LSB] = STMPE24XX_REG_IER_LSB, 956 [STMPE_IDX_ISR_MSB] = STMPE24XX_REG_ISR_MSB, 957 [STMPE_IDX_GPMR_LSB] = STMPE24XX_REG_GPMR_LSB, 958 [STMPE_IDX_GPMR_CSB] = STMPE24XX_REG_GPMR_CSB, 959 [STMPE_IDX_GPMR_MSB] = STMPE24XX_REG_GPMR_MSB, 960 [STMPE_IDX_GPSR_LSB] = STMPE24XX_REG_GPSR_LSB, 961 [STMPE_IDX_GPSR_CSB] = STMPE24XX_REG_GPSR_CSB, 962 [STMPE_IDX_GPSR_MSB] = STMPE24XX_REG_GPSR_MSB, 963 [STMPE_IDX_GPCR_LSB] = STMPE24XX_REG_GPCR_LSB, 964 [STMPE_IDX_GPCR_CSB] = STMPE24XX_REG_GPCR_CSB, 965 [STMPE_IDX_GPCR_MSB] = STMPE24XX_REG_GPCR_MSB, 966 [STMPE_IDX_GPDR_LSB] = STMPE24XX_REG_GPDR_LSB, 967 [STMPE_IDX_GPDR_CSB] = STMPE24XX_REG_GPDR_CSB, 968 [STMPE_IDX_GPDR_MSB] = STMPE24XX_REG_GPDR_MSB, 969 [STMPE_IDX_GPRER_LSB] = STMPE24XX_REG_GPRER_LSB, 970 [STMPE_IDX_GPRER_CSB] = STMPE24XX_REG_GPRER_CSB, 971 [STMPE_IDX_GPRER_MSB] = STMPE24XX_REG_GPRER_MSB, 972 [STMPE_IDX_GPFER_LSB] = STMPE24XX_REG_GPFER_LSB, 973 [STMPE_IDX_GPFER_CSB] = STMPE24XX_REG_GPFER_CSB, 974 [STMPE_IDX_GPFER_MSB] = STMPE24XX_REG_GPFER_MSB, 975 [STMPE_IDX_GPPUR_LSB] = STMPE24XX_REG_GPPUR_LSB, 976 [STMPE_IDX_GPPDR_LSB] = STMPE24XX_REG_GPPDR_LSB, 977 [STMPE_IDX_GPAFR_U_MSB] = STMPE24XX_REG_GPAFR_U_MSB, 978 [STMPE_IDX_IEGPIOR_LSB] = STMPE24XX_REG_IEGPIOR_LSB, 979 [STMPE_IDX_IEGPIOR_CSB] = STMPE24XX_REG_IEGPIOR_CSB, 980 [STMPE_IDX_IEGPIOR_MSB] = STMPE24XX_REG_IEGPIOR_MSB, 981 [STMPE_IDX_ISGPIOR_MSB] = STMPE24XX_REG_ISGPIOR_MSB, 982 [STMPE_IDX_GPEDR_LSB] = STMPE24XX_REG_GPEDR_LSB, 983 [STMPE_IDX_GPEDR_CSB] = STMPE24XX_REG_GPEDR_CSB, 984 [STMPE_IDX_GPEDR_MSB] = STMPE24XX_REG_GPEDR_MSB, 985 }; 986 987 static struct stmpe_variant_block stmpe24xx_blocks[] = { 988 { 989 .cell = &stmpe_gpio_cell, 990 .irq = STMPE24XX_IRQ_GPIOC, 991 .block = STMPE_BLOCK_GPIO, 992 }, 993 { 994 .cell = &stmpe_keypad_cell, 995 .irq = STMPE24XX_IRQ_KEYPAD, 996 .block = STMPE_BLOCK_KEYPAD, 997 }, 998 { 999 .cell = &stmpe_pwm_cell, 1000 .irq = STMPE24XX_IRQ_PWM0, 1001 .block = STMPE_BLOCK_PWM, 1002 }, 1003 }; 1004 1005 static int stmpe24xx_enable(struct stmpe *stmpe, unsigned int blocks, 1006 bool enable) 1007 { 1008 unsigned int mask = 0; 1009 1010 if (blocks & STMPE_BLOCK_GPIO) 1011 mask |= STMPE24XX_SYS_CTRL_ENABLE_GPIO; 1012 1013 if (blocks & STMPE_BLOCK_KEYPAD) 1014 mask |= STMPE24XX_SYS_CTRL_ENABLE_KPC; 1015 1016 return __stmpe_set_bits(stmpe, stmpe->regs[STMPE_IDX_SYS_CTRL], mask, 1017 enable ? mask : 0); 1018 } 1019 1020 static int stmpe24xx_get_altfunc(struct stmpe *stmpe, enum stmpe_block block) 1021 { 1022 switch (block) { 1023 case STMPE_BLOCK_ROTATOR: 1024 return 2; 1025 1026 case STMPE_BLOCK_KEYPAD: 1027 case STMPE_BLOCK_PWM: 1028 return 1; 1029 1030 case STMPE_BLOCK_GPIO: 1031 default: 1032 return 0; 1033 } 1034 } 1035 1036 static struct stmpe_variant_info stmpe2401 = { 1037 .name = "stmpe2401", 1038 .id_val = 0x0101, 1039 .id_mask = 0xffff, 1040 .num_gpios = 24, 1041 .af_bits = 2, 1042 .regs = stmpe24xx_regs, 1043 .blocks = stmpe24xx_blocks, 1044 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), 1045 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, 1046 .enable = stmpe24xx_enable, 1047 .get_altfunc = stmpe24xx_get_altfunc, 1048 }; 1049 1050 static struct stmpe_variant_info stmpe2403 = { 1051 .name = "stmpe2403", 1052 .id_val = 0x0120, 1053 .id_mask = 0xffff, 1054 .num_gpios = 24, 1055 .af_bits = 2, 1056 .regs = stmpe24xx_regs, 1057 .blocks = stmpe24xx_blocks, 1058 .num_blocks = ARRAY_SIZE(stmpe24xx_blocks), 1059 .num_irqs = STMPE24XX_NR_INTERNAL_IRQS, 1060 .enable = stmpe24xx_enable, 1061 .get_altfunc = stmpe24xx_get_altfunc, 1062 .enable_autosleep = stmpe1601_autosleep, /* same as stmpe1601 */ 1063 }; 1064 1065 static struct stmpe_variant_info *stmpe_variant_info[STMPE_NBR_PARTS] = { 1066 [STMPE610] = &stmpe610, 1067 [STMPE801] = &stmpe801, 1068 [STMPE811] = &stmpe811, 1069 [STMPE1600] = &stmpe1600, 1070 [STMPE1601] = &stmpe1601, 1071 [STMPE1801] = &stmpe1801, 1072 [STMPE2401] = &stmpe2401, 1073 [STMPE2403] = &stmpe2403, 1074 }; 1075 1076 /* 1077 * These devices can be connected in a 'no-irq' configuration - the irq pin 1078 * is not used and the device cannot interrupt the CPU. Here we only list 1079 * devices which support this configuration - the driver will fail probing 1080 * for any devices not listed here which are configured in this way. 1081 */ 1082 static struct stmpe_variant_info *stmpe_noirq_variant_info[STMPE_NBR_PARTS] = { 1083 [STMPE801] = &stmpe801_noirq, 1084 }; 1085 1086 static irqreturn_t stmpe_irq(int irq, void *data) 1087 { 1088 struct stmpe *stmpe = data; 1089 struct stmpe_variant_info *variant = stmpe->variant; 1090 int num = DIV_ROUND_UP(variant->num_irqs, 8); 1091 u8 israddr; 1092 u8 isr[3]; 1093 int ret; 1094 int i; 1095 1096 if (variant->id_val == STMPE801_ID || 1097 variant->id_val == STMPE1600_ID) { 1098 int base = irq_find_mapping(stmpe->domain, 0); 1099 1100 handle_nested_irq(base); 1101 return IRQ_HANDLED; 1102 } 1103 1104 if (variant->id_val == STMPE1801_ID) 1105 israddr = stmpe->regs[STMPE_IDX_ISR_LSB]; 1106 else 1107 israddr = stmpe->regs[STMPE_IDX_ISR_MSB]; 1108 1109 ret = stmpe_block_read(stmpe, israddr, num, isr); 1110 if (ret < 0) 1111 return IRQ_NONE; 1112 1113 for (i = 0; i < num; i++) { 1114 int bank = num - i - 1; 1115 u8 status = isr[i]; 1116 u8 clear; 1117 1118 status &= stmpe->ier[bank]; 1119 if (!status) 1120 continue; 1121 1122 clear = status; 1123 while (status) { 1124 int bit = __ffs(status); 1125 int line = bank * 8 + bit; 1126 int nestedirq = irq_find_mapping(stmpe->domain, line); 1127 1128 handle_nested_irq(nestedirq); 1129 status &= ~(1 << bit); 1130 } 1131 1132 stmpe_reg_write(stmpe, israddr + i, clear); 1133 } 1134 1135 return IRQ_HANDLED; 1136 } 1137 1138 static void stmpe_irq_lock(struct irq_data *data) 1139 { 1140 struct stmpe *stmpe = irq_data_get_irq_chip_data(data); 1141 1142 mutex_lock(&stmpe->irq_lock); 1143 } 1144 1145 static void stmpe_irq_sync_unlock(struct irq_data *data) 1146 { 1147 struct stmpe *stmpe = irq_data_get_irq_chip_data(data); 1148 struct stmpe_variant_info *variant = stmpe->variant; 1149 int num = DIV_ROUND_UP(variant->num_irqs, 8); 1150 int i; 1151 1152 for (i = 0; i < num; i++) { 1153 u8 new = stmpe->ier[i]; 1154 u8 old = stmpe->oldier[i]; 1155 1156 if (new == old) 1157 continue; 1158 1159 stmpe->oldier[i] = new; 1160 stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_IER_LSB + i], new); 1161 } 1162 1163 mutex_unlock(&stmpe->irq_lock); 1164 } 1165 1166 static void stmpe_irq_mask(struct irq_data *data) 1167 { 1168 struct stmpe *stmpe = irq_data_get_irq_chip_data(data); 1169 int offset = data->hwirq; 1170 int regoffset = offset / 8; 1171 int mask = 1 << (offset % 8); 1172 1173 stmpe->ier[regoffset] &= ~mask; 1174 } 1175 1176 static void stmpe_irq_unmask(struct irq_data *data) 1177 { 1178 struct stmpe *stmpe = irq_data_get_irq_chip_data(data); 1179 int offset = data->hwirq; 1180 int regoffset = offset / 8; 1181 int mask = 1 << (offset % 8); 1182 1183 stmpe->ier[regoffset] |= mask; 1184 } 1185 1186 static struct irq_chip stmpe_irq_chip = { 1187 .name = "stmpe", 1188 .irq_bus_lock = stmpe_irq_lock, 1189 .irq_bus_sync_unlock = stmpe_irq_sync_unlock, 1190 .irq_mask = stmpe_irq_mask, 1191 .irq_unmask = stmpe_irq_unmask, 1192 }; 1193 1194 static int stmpe_irq_map(struct irq_domain *d, unsigned int virq, 1195 irq_hw_number_t hwirq) 1196 { 1197 struct stmpe *stmpe = d->host_data; 1198 struct irq_chip *chip = NULL; 1199 1200 if (stmpe->variant->id_val != STMPE801_ID) 1201 chip = &stmpe_irq_chip; 1202 1203 irq_set_chip_data(virq, stmpe); 1204 irq_set_chip_and_handler(virq, chip, handle_edge_irq); 1205 irq_set_nested_thread(virq, 1); 1206 irq_set_noprobe(virq); 1207 1208 return 0; 1209 } 1210 1211 static void stmpe_irq_unmap(struct irq_domain *d, unsigned int virq) 1212 { 1213 irq_set_chip_and_handler(virq, NULL, NULL); 1214 irq_set_chip_data(virq, NULL); 1215 } 1216 1217 static const struct irq_domain_ops stmpe_irq_ops = { 1218 .map = stmpe_irq_map, 1219 .unmap = stmpe_irq_unmap, 1220 .xlate = irq_domain_xlate_twocell, 1221 }; 1222 1223 static int stmpe_irq_init(struct stmpe *stmpe, struct device_node *np) 1224 { 1225 int base = 0; 1226 int num_irqs = stmpe->variant->num_irqs; 1227 1228 stmpe->domain = irq_domain_add_simple(np, num_irqs, base, 1229 &stmpe_irq_ops, stmpe); 1230 if (!stmpe->domain) { 1231 dev_err(stmpe->dev, "Failed to create irqdomain\n"); 1232 return -ENOSYS; 1233 } 1234 1235 return 0; 1236 } 1237 1238 static int stmpe_chip_init(struct stmpe *stmpe) 1239 { 1240 unsigned int irq_trigger = stmpe->pdata->irq_trigger; 1241 int autosleep_timeout = stmpe->pdata->autosleep_timeout; 1242 struct stmpe_variant_info *variant = stmpe->variant; 1243 u8 icr = 0; 1244 unsigned int id; 1245 u8 data[2]; 1246 int ret; 1247 1248 ret = stmpe_block_read(stmpe, stmpe->regs[STMPE_IDX_CHIP_ID], 1249 ARRAY_SIZE(data), data); 1250 if (ret < 0) 1251 return ret; 1252 1253 id = (data[0] << 8) | data[1]; 1254 if ((id & variant->id_mask) != variant->id_val) { 1255 dev_err(stmpe->dev, "unknown chip id: %#x\n", id); 1256 return -EINVAL; 1257 } 1258 1259 dev_info(stmpe->dev, "%s detected, chip id: %#x\n", variant->name, id); 1260 1261 /* Disable all modules -- subdrivers should enable what they need. */ 1262 ret = stmpe_disable(stmpe, ~0); 1263 if (ret) 1264 return ret; 1265 1266 ret = stmpe_reset(stmpe); 1267 if (ret < 0) 1268 return ret; 1269 1270 if (stmpe->irq >= 0) { 1271 if (id == STMPE801_ID || id == STMPE1600_ID) 1272 icr = STMPE_SYS_CTRL_INT_EN; 1273 else 1274 icr = STMPE_ICR_LSB_GIM; 1275 1276 /* STMPE801 and STMPE1600 don't support Edge interrupts */ 1277 if (id != STMPE801_ID && id != STMPE1600_ID) { 1278 if (irq_trigger == IRQF_TRIGGER_FALLING || 1279 irq_trigger == IRQF_TRIGGER_RISING) 1280 icr |= STMPE_ICR_LSB_EDGE; 1281 } 1282 1283 if (irq_trigger == IRQF_TRIGGER_RISING || 1284 irq_trigger == IRQF_TRIGGER_HIGH) { 1285 if (id == STMPE801_ID || id == STMPE1600_ID) 1286 icr |= STMPE_SYS_CTRL_INT_HI; 1287 else 1288 icr |= STMPE_ICR_LSB_HIGH; 1289 } 1290 } 1291 1292 if (stmpe->pdata->autosleep) { 1293 ret = stmpe_autosleep(stmpe, autosleep_timeout); 1294 if (ret) 1295 return ret; 1296 } 1297 1298 return stmpe_reg_write(stmpe, stmpe->regs[STMPE_IDX_ICR_LSB], icr); 1299 } 1300 1301 static int stmpe_add_device(struct stmpe *stmpe, const struct mfd_cell *cell) 1302 { 1303 return mfd_add_devices(stmpe->dev, stmpe->pdata->id, cell, 1, 1304 NULL, 0, stmpe->domain); 1305 } 1306 1307 static int stmpe_devices_init(struct stmpe *stmpe) 1308 { 1309 struct stmpe_variant_info *variant = stmpe->variant; 1310 unsigned int platform_blocks = stmpe->pdata->blocks; 1311 int ret = -EINVAL; 1312 int i, j; 1313 1314 for (i = 0; i < variant->num_blocks; i++) { 1315 struct stmpe_variant_block *block = &variant->blocks[i]; 1316 1317 if (!(platform_blocks & block->block)) 1318 continue; 1319 1320 for (j = 0; j < block->cell->num_resources; j++) { 1321 struct resource *res = 1322 (struct resource *) &block->cell->resources[j]; 1323 1324 /* Dynamically fill in a variant's IRQ. */ 1325 if (res->flags & IORESOURCE_IRQ) 1326 res->start = res->end = block->irq + j; 1327 } 1328 1329 platform_blocks &= ~block->block; 1330 ret = stmpe_add_device(stmpe, block->cell); 1331 if (ret) 1332 return ret; 1333 } 1334 1335 if (platform_blocks) 1336 dev_warn(stmpe->dev, 1337 "platform wants blocks (%#x) not present on variant", 1338 platform_blocks); 1339 1340 return ret; 1341 } 1342 1343 static void stmpe_of_probe(struct stmpe_platform_data *pdata, 1344 struct device_node *np) 1345 { 1346 struct device_node *child; 1347 1348 pdata->id = of_alias_get_id(np, "stmpe-i2c"); 1349 if (pdata->id < 0) 1350 pdata->id = -1; 1351 1352 pdata->irq_gpio = of_get_named_gpio_flags(np, "irq-gpio", 0, 1353 &pdata->irq_trigger); 1354 if (gpio_is_valid(pdata->irq_gpio)) 1355 pdata->irq_over_gpio = 1; 1356 else 1357 pdata->irq_trigger = IRQF_TRIGGER_NONE; 1358 1359 of_property_read_u32(np, "st,autosleep-timeout", 1360 &pdata->autosleep_timeout); 1361 1362 pdata->autosleep = (pdata->autosleep_timeout) ? true : false; 1363 1364 for_each_available_child_of_node(np, child) { 1365 if (of_node_name_eq(child, "stmpe_gpio")) { 1366 pdata->blocks |= STMPE_BLOCK_GPIO; 1367 } else if (of_node_name_eq(child, "stmpe_keypad")) { 1368 pdata->blocks |= STMPE_BLOCK_KEYPAD; 1369 } else if (of_node_name_eq(child, "stmpe_touchscreen")) { 1370 pdata->blocks |= STMPE_BLOCK_TOUCHSCREEN; 1371 } else if (of_node_name_eq(child, "stmpe_adc")) { 1372 pdata->blocks |= STMPE_BLOCK_ADC; 1373 } else if (of_node_name_eq(child, "stmpe_pwm")) { 1374 pdata->blocks |= STMPE_BLOCK_PWM; 1375 } else if (of_node_name_eq(child, "stmpe_rotator")) { 1376 pdata->blocks |= STMPE_BLOCK_ROTATOR; 1377 } 1378 } 1379 } 1380 1381 /* Called from client specific probe routines */ 1382 int stmpe_probe(struct stmpe_client_info *ci, enum stmpe_partnum partnum) 1383 { 1384 struct stmpe_platform_data *pdata; 1385 struct device_node *np = ci->dev->of_node; 1386 struct stmpe *stmpe; 1387 int ret; 1388 u32 val; 1389 1390 pdata = devm_kzalloc(ci->dev, sizeof(*pdata), GFP_KERNEL); 1391 if (!pdata) 1392 return -ENOMEM; 1393 1394 stmpe_of_probe(pdata, np); 1395 1396 if (of_find_property(np, "interrupts", NULL) == NULL) 1397 ci->irq = -1; 1398 1399 stmpe = devm_kzalloc(ci->dev, sizeof(struct stmpe), GFP_KERNEL); 1400 if (!stmpe) 1401 return -ENOMEM; 1402 1403 mutex_init(&stmpe->irq_lock); 1404 mutex_init(&stmpe->lock); 1405 1406 if (!of_property_read_u32(np, "st,sample-time", &val)) 1407 stmpe->sample_time = val; 1408 if (!of_property_read_u32(np, "st,mod-12b", &val)) 1409 stmpe->mod_12b = val; 1410 if (!of_property_read_u32(np, "st,ref-sel", &val)) 1411 stmpe->ref_sel = val; 1412 if (!of_property_read_u32(np, "st,adc-freq", &val)) 1413 stmpe->adc_freq = val; 1414 1415 stmpe->dev = ci->dev; 1416 stmpe->client = ci->client; 1417 stmpe->pdata = pdata; 1418 stmpe->ci = ci; 1419 stmpe->partnum = partnum; 1420 stmpe->variant = stmpe_variant_info[partnum]; 1421 stmpe->regs = stmpe->variant->regs; 1422 stmpe->num_gpios = stmpe->variant->num_gpios; 1423 stmpe->vcc = devm_regulator_get_optional(ci->dev, "vcc"); 1424 if (!IS_ERR(stmpe->vcc)) { 1425 ret = regulator_enable(stmpe->vcc); 1426 if (ret) 1427 dev_warn(ci->dev, "failed to enable VCC supply\n"); 1428 } 1429 stmpe->vio = devm_regulator_get_optional(ci->dev, "vio"); 1430 if (!IS_ERR(stmpe->vio)) { 1431 ret = regulator_enable(stmpe->vio); 1432 if (ret) 1433 dev_warn(ci->dev, "failed to enable VIO supply\n"); 1434 } 1435 dev_set_drvdata(stmpe->dev, stmpe); 1436 1437 if (ci->init) 1438 ci->init(stmpe); 1439 1440 if (pdata->irq_over_gpio) { 1441 ret = devm_gpio_request_one(ci->dev, pdata->irq_gpio, 1442 GPIOF_DIR_IN, "stmpe"); 1443 if (ret) { 1444 dev_err(stmpe->dev, "failed to request IRQ GPIO: %d\n", 1445 ret); 1446 return ret; 1447 } 1448 1449 stmpe->irq = gpio_to_irq(pdata->irq_gpio); 1450 } else { 1451 stmpe->irq = ci->irq; 1452 } 1453 1454 if (stmpe->irq < 0) { 1455 /* use alternate variant info for no-irq mode, if supported */ 1456 dev_info(stmpe->dev, 1457 "%s configured in no-irq mode by platform data\n", 1458 stmpe->variant->name); 1459 if (!stmpe_noirq_variant_info[stmpe->partnum]) { 1460 dev_err(stmpe->dev, 1461 "%s does not support no-irq mode!\n", 1462 stmpe->variant->name); 1463 return -ENODEV; 1464 } 1465 stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum]; 1466 } else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) { 1467 pdata->irq_trigger = irq_get_trigger_type(stmpe->irq); 1468 } 1469 1470 ret = stmpe_chip_init(stmpe); 1471 if (ret) 1472 return ret; 1473 1474 if (stmpe->irq >= 0) { 1475 ret = stmpe_irq_init(stmpe, np); 1476 if (ret) 1477 return ret; 1478 1479 ret = devm_request_threaded_irq(ci->dev, stmpe->irq, NULL, 1480 stmpe_irq, pdata->irq_trigger | IRQF_ONESHOT, 1481 "stmpe", stmpe); 1482 if (ret) { 1483 dev_err(stmpe->dev, "failed to request IRQ: %d\n", 1484 ret); 1485 return ret; 1486 } 1487 } 1488 1489 ret = stmpe_devices_init(stmpe); 1490 if (!ret) 1491 return 0; 1492 1493 dev_err(stmpe->dev, "failed to add children\n"); 1494 mfd_remove_devices(stmpe->dev); 1495 1496 return ret; 1497 } 1498 1499 void stmpe_remove(struct stmpe *stmpe) 1500 { 1501 if (!IS_ERR(stmpe->vio)) 1502 regulator_disable(stmpe->vio); 1503 if (!IS_ERR(stmpe->vcc)) 1504 regulator_disable(stmpe->vcc); 1505 1506 __stmpe_disable(stmpe, STMPE_BLOCK_ADC); 1507 1508 mfd_remove_devices(stmpe->dev); 1509 } 1510 1511 #ifdef CONFIG_PM 1512 static int stmpe_suspend(struct device *dev) 1513 { 1514 struct stmpe *stmpe = dev_get_drvdata(dev); 1515 1516 if (stmpe->irq >= 0 && device_may_wakeup(dev)) 1517 enable_irq_wake(stmpe->irq); 1518 1519 return 0; 1520 } 1521 1522 static int stmpe_resume(struct device *dev) 1523 { 1524 struct stmpe *stmpe = dev_get_drvdata(dev); 1525 1526 if (stmpe->irq >= 0 && device_may_wakeup(dev)) 1527 disable_irq_wake(stmpe->irq); 1528 1529 return 0; 1530 } 1531 1532 const struct dev_pm_ops stmpe_dev_pm_ops = { 1533 .suspend = stmpe_suspend, 1534 .resume = stmpe_resume, 1535 }; 1536 #endif 1537