1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Cherryview/Braswell pinctrl driver 4 * 5 * Copyright (C) 2014, Intel Corporation 6 * Author: Mika Westerberg <mika.westerberg@linux.intel.com> 7 * 8 * This driver is based on the original Cherryview GPIO driver by 9 * Ning Li <ning.li@intel.com> 10 * Alan Cox <alan@linux.intel.com> 11 */ 12 13 #include <linux/acpi.h> 14 #include <linux/dmi.h> 15 #include <linux/gpio/driver.h> 16 #include <linux/kernel.h> 17 #include <linux/module.h> 18 #include <linux/platform_device.h> 19 #include <linux/types.h> 20 21 #include <linux/pinctrl/pinctrl.h> 22 #include <linux/pinctrl/pinmux.h> 23 #include <linux/pinctrl/pinconf.h> 24 #include <linux/pinctrl/pinconf-generic.h> 25 26 #include "pinctrl-intel.h" 27 28 #define CHV_INTSTAT 0x300 29 #define CHV_INTMASK 0x380 30 31 #define FAMILY_PAD_REGS_OFF 0x4400 32 #define FAMILY_PAD_REGS_SIZE 0x400 33 #define MAX_FAMILY_PAD_GPIO_NO 15 34 #define GPIO_REGS_SIZE 8 35 36 #define CHV_PADCTRL0 0x000 37 #define CHV_PADCTRL0_INTSEL_SHIFT 28 38 #define CHV_PADCTRL0_INTSEL_MASK (0xf << CHV_PADCTRL0_INTSEL_SHIFT) 39 #define CHV_PADCTRL0_TERM_UP BIT(23) 40 #define CHV_PADCTRL0_TERM_SHIFT 20 41 #define CHV_PADCTRL0_TERM_MASK (7 << CHV_PADCTRL0_TERM_SHIFT) 42 #define CHV_PADCTRL0_TERM_20K 1 43 #define CHV_PADCTRL0_TERM_5K 2 44 #define CHV_PADCTRL0_TERM_1K 4 45 #define CHV_PADCTRL0_PMODE_SHIFT 16 46 #define CHV_PADCTRL0_PMODE_MASK (0xf << CHV_PADCTRL0_PMODE_SHIFT) 47 #define CHV_PADCTRL0_GPIOEN BIT(15) 48 #define CHV_PADCTRL0_GPIOCFG_SHIFT 8 49 #define CHV_PADCTRL0_GPIOCFG_MASK (7 << CHV_PADCTRL0_GPIOCFG_SHIFT) 50 #define CHV_PADCTRL0_GPIOCFG_GPIO 0 51 #define CHV_PADCTRL0_GPIOCFG_GPO 1 52 #define CHV_PADCTRL0_GPIOCFG_GPI 2 53 #define CHV_PADCTRL0_GPIOCFG_HIZ 3 54 #define CHV_PADCTRL0_GPIOTXSTATE BIT(1) 55 #define CHV_PADCTRL0_GPIORXSTATE BIT(0) 56 57 #define CHV_PADCTRL1 0x004 58 #define CHV_PADCTRL1_CFGLOCK BIT(31) 59 #define CHV_PADCTRL1_INVRXTX_SHIFT 4 60 #define CHV_PADCTRL1_INVRXTX_MASK (0xf << CHV_PADCTRL1_INVRXTX_SHIFT) 61 #define CHV_PADCTRL1_INVRXTX_TXENABLE (2 << CHV_PADCTRL1_INVRXTX_SHIFT) 62 #define CHV_PADCTRL1_ODEN BIT(3) 63 #define CHV_PADCTRL1_INVRXTX_RXDATA (4 << CHV_PADCTRL1_INVRXTX_SHIFT) 64 #define CHV_PADCTRL1_INTWAKECFG_MASK 7 65 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1 66 #define CHV_PADCTRL1_INTWAKECFG_RISING 2 67 #define CHV_PADCTRL1_INTWAKECFG_BOTH 3 68 #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4 69 70 /** 71 * struct chv_alternate_function - A per group or per pin alternate function 72 * @pin: Pin number (only used in per pin configs) 73 * @mode: Mode the pin should be set in 74 * @invert_oe: Invert OE for this pin 75 */ 76 struct chv_alternate_function { 77 unsigned int pin; 78 u8 mode; 79 bool invert_oe; 80 }; 81 82 /** 83 * struct chv_pincgroup - describes a CHV pin group 84 * @name: Name of the group 85 * @pins: An array of pins in this group 86 * @npins: Number of pins in this group 87 * @altfunc: Alternate function applied to all pins in this group 88 * @overrides: Alternate function override per pin or %NULL if not used 89 * @noverrides: Number of per pin alternate function overrides if 90 * @overrides != NULL. 91 */ 92 struct chv_pingroup { 93 const char *name; 94 const unsigned int *pins; 95 size_t npins; 96 struct chv_alternate_function altfunc; 97 const struct chv_alternate_function *overrides; 98 size_t noverrides; 99 }; 100 101 /** 102 * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs 103 * @base: Start pin number 104 * @npins: Number of pins in this range 105 */ 106 struct chv_gpio_pinrange { 107 unsigned int base; 108 unsigned int npins; 109 }; 110 111 /** 112 * struct chv_community - A community specific configuration 113 * @uid: ACPI _UID used to match the community 114 * @pins: All pins in this community 115 * @npins: Number of pins 116 * @groups: All groups in this community 117 * @ngroups: Number of groups 118 * @functions: All functions in this community 119 * @nfunctions: Number of functions 120 * @gpio_ranges: An array of GPIO ranges in this community 121 * @ngpio_ranges: Number of GPIO ranges 122 * @nirqs: Total number of IRQs this community can generate 123 * @acpi_space_id: An address space ID for ACPI OpRegion handler 124 */ 125 struct chv_community { 126 const char *uid; 127 const struct pinctrl_pin_desc *pins; 128 size_t npins; 129 const struct chv_pingroup *groups; 130 size_t ngroups; 131 const struct intel_function *functions; 132 size_t nfunctions; 133 const struct chv_gpio_pinrange *gpio_ranges; 134 size_t ngpio_ranges; 135 size_t nirqs; 136 acpi_adr_space_type acpi_space_id; 137 }; 138 139 struct chv_pin_context { 140 u32 padctrl0; 141 u32 padctrl1; 142 }; 143 144 /** 145 * struct chv_pinctrl - CHV pinctrl private structure 146 * @dev: Pointer to the parent device 147 * @pctldesc: Pin controller description 148 * @pctldev: Pointer to the pin controller device 149 * @chip: GPIO chip in this pin controller 150 * @regs: MMIO registers 151 * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO 152 * offset (in GPIO number space) 153 * @community: Community this pinctrl instance represents 154 * @saved_intmask: Interrupt mask saved for system sleep 155 * @saved_pin_context: Pointer to a context of the pins saved for system sleep 156 * 157 * The first group in @groups is expected to contain all pins that can be 158 * used as GPIOs. 159 */ 160 struct chv_pinctrl { 161 struct device *dev; 162 struct pinctrl_desc pctldesc; 163 struct pinctrl_dev *pctldev; 164 struct gpio_chip chip; 165 void __iomem *regs; 166 unsigned intr_lines[16]; 167 const struct chv_community *community; 168 u32 saved_intmask; 169 struct chv_pin_context *saved_pin_context; 170 }; 171 172 #define ALTERNATE_FUNCTION(p, m, i) \ 173 { \ 174 .pin = (p), \ 175 .mode = (m), \ 176 .invert_oe = (i), \ 177 } 178 179 #define PIN_GROUP_WITH_ALT(n, p, m, i) \ 180 { \ 181 .name = (n), \ 182 .pins = (p), \ 183 .npins = ARRAY_SIZE((p)), \ 184 .altfunc.mode = (m), \ 185 .altfunc.invert_oe = (i), \ 186 } 187 188 #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o) \ 189 { \ 190 .name = (n), \ 191 .pins = (p), \ 192 .npins = ARRAY_SIZE((p)), \ 193 .altfunc.mode = (m), \ 194 .altfunc.invert_oe = (i), \ 195 .overrides = (o), \ 196 .noverrides = ARRAY_SIZE((o)), \ 197 } 198 199 #define GPIO_PINRANGE(start, end) \ 200 { \ 201 .base = (start), \ 202 .npins = (end) - (start) + 1, \ 203 } 204 205 static const struct pinctrl_pin_desc southwest_pins[] = { 206 PINCTRL_PIN(0, "FST_SPI_D2"), 207 PINCTRL_PIN(1, "FST_SPI_D0"), 208 PINCTRL_PIN(2, "FST_SPI_CLK"), 209 PINCTRL_PIN(3, "FST_SPI_D3"), 210 PINCTRL_PIN(4, "FST_SPI_CS1_B"), 211 PINCTRL_PIN(5, "FST_SPI_D1"), 212 PINCTRL_PIN(6, "FST_SPI_CS0_B"), 213 PINCTRL_PIN(7, "FST_SPI_CS2_B"), 214 215 PINCTRL_PIN(15, "UART1_RTS_B"), 216 PINCTRL_PIN(16, "UART1_RXD"), 217 PINCTRL_PIN(17, "UART2_RXD"), 218 PINCTRL_PIN(18, "UART1_CTS_B"), 219 PINCTRL_PIN(19, "UART2_RTS_B"), 220 PINCTRL_PIN(20, "UART1_TXD"), 221 PINCTRL_PIN(21, "UART2_TXD"), 222 PINCTRL_PIN(22, "UART2_CTS_B"), 223 224 PINCTRL_PIN(30, "MF_HDA_CLK"), 225 PINCTRL_PIN(31, "MF_HDA_RSTB"), 226 PINCTRL_PIN(32, "MF_HDA_SDIO"), 227 PINCTRL_PIN(33, "MF_HDA_SDO"), 228 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"), 229 PINCTRL_PIN(35, "MF_HDA_SYNC"), 230 PINCTRL_PIN(36, "MF_HDA_SDI1"), 231 PINCTRL_PIN(37, "MF_HDA_DOCKENB"), 232 233 PINCTRL_PIN(45, "I2C5_SDA"), 234 PINCTRL_PIN(46, "I2C4_SDA"), 235 PINCTRL_PIN(47, "I2C6_SDA"), 236 PINCTRL_PIN(48, "I2C5_SCL"), 237 PINCTRL_PIN(49, "I2C_NFC_SDA"), 238 PINCTRL_PIN(50, "I2C4_SCL"), 239 PINCTRL_PIN(51, "I2C6_SCL"), 240 PINCTRL_PIN(52, "I2C_NFC_SCL"), 241 242 PINCTRL_PIN(60, "I2C1_SDA"), 243 PINCTRL_PIN(61, "I2C0_SDA"), 244 PINCTRL_PIN(62, "I2C2_SDA"), 245 PINCTRL_PIN(63, "I2C1_SCL"), 246 PINCTRL_PIN(64, "I2C3_SDA"), 247 PINCTRL_PIN(65, "I2C0_SCL"), 248 PINCTRL_PIN(66, "I2C2_SCL"), 249 PINCTRL_PIN(67, "I2C3_SCL"), 250 251 PINCTRL_PIN(75, "SATA_GP0"), 252 PINCTRL_PIN(76, "SATA_GP1"), 253 PINCTRL_PIN(77, "SATA_LEDN"), 254 PINCTRL_PIN(78, "SATA_GP2"), 255 PINCTRL_PIN(79, "MF_SMB_ALERTB"), 256 PINCTRL_PIN(80, "SATA_GP3"), 257 PINCTRL_PIN(81, "MF_SMB_CLK"), 258 PINCTRL_PIN(82, "MF_SMB_DATA"), 259 260 PINCTRL_PIN(90, "PCIE_CLKREQ0B"), 261 PINCTRL_PIN(91, "PCIE_CLKREQ1B"), 262 PINCTRL_PIN(92, "GP_SSP_2_CLK"), 263 PINCTRL_PIN(93, "PCIE_CLKREQ2B"), 264 PINCTRL_PIN(94, "GP_SSP_2_RXD"), 265 PINCTRL_PIN(95, "PCIE_CLKREQ3B"), 266 PINCTRL_PIN(96, "GP_SSP_2_FS"), 267 PINCTRL_PIN(97, "GP_SSP_2_TXD"), 268 }; 269 270 static const unsigned southwest_uart0_pins[] = { 16, 20 }; 271 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 }; 272 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 }; 273 static const unsigned southwest_i2c0_pins[] = { 61, 65 }; 274 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 }; 275 static const unsigned southwest_lpe_pins[] = { 276 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97, 277 }; 278 static const unsigned southwest_i2c1_pins[] = { 60, 63 }; 279 static const unsigned southwest_i2c2_pins[] = { 62, 66 }; 280 static const unsigned southwest_i2c3_pins[] = { 64, 67 }; 281 static const unsigned southwest_i2c4_pins[] = { 46, 50 }; 282 static const unsigned southwest_i2c5_pins[] = { 45, 48 }; 283 static const unsigned southwest_i2c6_pins[] = { 47, 51 }; 284 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 }; 285 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 }; 286 287 /* LPE I2S TXD pins need to have invert_oe set */ 288 static const struct chv_alternate_function southwest_lpe_altfuncs[] = { 289 ALTERNATE_FUNCTION(30, 1, true), 290 ALTERNATE_FUNCTION(34, 1, true), 291 ALTERNATE_FUNCTION(97, 1, true), 292 }; 293 294 /* 295 * Two spi3 chipselects are available in different mode than the main spi3 296 * functionality, which is using mode 1. 297 */ 298 static const struct chv_alternate_function southwest_spi3_altfuncs[] = { 299 ALTERNATE_FUNCTION(76, 3, false), 300 ALTERNATE_FUNCTION(80, 3, false), 301 }; 302 303 static const struct chv_pingroup southwest_groups[] = { 304 PIN_GROUP_WITH_ALT("uart0_grp", southwest_uart0_pins, 2, false), 305 PIN_GROUP_WITH_ALT("uart1_grp", southwest_uart1_pins, 1, false), 306 PIN_GROUP_WITH_ALT("uart2_grp", southwest_uart2_pins, 1, false), 307 PIN_GROUP_WITH_ALT("hda_grp", southwest_hda_pins, 2, false), 308 PIN_GROUP_WITH_ALT("i2c0_grp", southwest_i2c0_pins, 1, true), 309 PIN_GROUP_WITH_ALT("i2c1_grp", southwest_i2c1_pins, 1, true), 310 PIN_GROUP_WITH_ALT("i2c2_grp", southwest_i2c2_pins, 1, true), 311 PIN_GROUP_WITH_ALT("i2c3_grp", southwest_i2c3_pins, 1, true), 312 PIN_GROUP_WITH_ALT("i2c4_grp", southwest_i2c4_pins, 1, true), 313 PIN_GROUP_WITH_ALT("i2c5_grp", southwest_i2c5_pins, 1, true), 314 PIN_GROUP_WITH_ALT("i2c6_grp", southwest_i2c6_pins, 1, true), 315 PIN_GROUP_WITH_ALT("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true), 316 317 PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false, 318 southwest_lpe_altfuncs), 319 PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false, 320 southwest_spi3_altfuncs), 321 }; 322 323 static const char * const southwest_uart0_groups[] = { "uart0_grp" }; 324 static const char * const southwest_uart1_groups[] = { "uart1_grp" }; 325 static const char * const southwest_uart2_groups[] = { "uart2_grp" }; 326 static const char * const southwest_hda_groups[] = { "hda_grp" }; 327 static const char * const southwest_lpe_groups[] = { "lpe_grp" }; 328 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" }; 329 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" }; 330 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" }; 331 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" }; 332 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" }; 333 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" }; 334 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" }; 335 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" }; 336 static const char * const southwest_spi3_groups[] = { "spi3_grp" }; 337 338 /* 339 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are 340 * enabled only as GPIOs. 341 */ 342 static const struct intel_function southwest_functions[] = { 343 FUNCTION("uart0", southwest_uart0_groups), 344 FUNCTION("uart1", southwest_uart1_groups), 345 FUNCTION("uart2", southwest_uart2_groups), 346 FUNCTION("hda", southwest_hda_groups), 347 FUNCTION("lpe", southwest_lpe_groups), 348 FUNCTION("i2c0", southwest_i2c0_groups), 349 FUNCTION("i2c1", southwest_i2c1_groups), 350 FUNCTION("i2c2", southwest_i2c2_groups), 351 FUNCTION("i2c3", southwest_i2c3_groups), 352 FUNCTION("i2c4", southwest_i2c4_groups), 353 FUNCTION("i2c5", southwest_i2c5_groups), 354 FUNCTION("i2c6", southwest_i2c6_groups), 355 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups), 356 FUNCTION("spi3", southwest_spi3_groups), 357 }; 358 359 static const struct chv_gpio_pinrange southwest_gpio_ranges[] = { 360 GPIO_PINRANGE(0, 7), 361 GPIO_PINRANGE(15, 22), 362 GPIO_PINRANGE(30, 37), 363 GPIO_PINRANGE(45, 52), 364 GPIO_PINRANGE(60, 67), 365 GPIO_PINRANGE(75, 82), 366 GPIO_PINRANGE(90, 97), 367 }; 368 369 static const struct chv_community southwest_community = { 370 .uid = "1", 371 .pins = southwest_pins, 372 .npins = ARRAY_SIZE(southwest_pins), 373 .groups = southwest_groups, 374 .ngroups = ARRAY_SIZE(southwest_groups), 375 .functions = southwest_functions, 376 .nfunctions = ARRAY_SIZE(southwest_functions), 377 .gpio_ranges = southwest_gpio_ranges, 378 .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges), 379 /* 380 * Southwest community can benerate GPIO interrupts only for the 381 * first 8 interrupts. The upper half (8-15) can only be used to 382 * trigger GPEs. 383 */ 384 .nirqs = 8, 385 .acpi_space_id = 0x91, 386 }; 387 388 static const struct pinctrl_pin_desc north_pins[] = { 389 PINCTRL_PIN(0, "GPIO_DFX_0"), 390 PINCTRL_PIN(1, "GPIO_DFX_3"), 391 PINCTRL_PIN(2, "GPIO_DFX_7"), 392 PINCTRL_PIN(3, "GPIO_DFX_1"), 393 PINCTRL_PIN(4, "GPIO_DFX_5"), 394 PINCTRL_PIN(5, "GPIO_DFX_4"), 395 PINCTRL_PIN(6, "GPIO_DFX_8"), 396 PINCTRL_PIN(7, "GPIO_DFX_2"), 397 PINCTRL_PIN(8, "GPIO_DFX_6"), 398 399 PINCTRL_PIN(15, "GPIO_SUS0"), 400 PINCTRL_PIN(16, "SEC_GPIO_SUS10"), 401 PINCTRL_PIN(17, "GPIO_SUS3"), 402 PINCTRL_PIN(18, "GPIO_SUS7"), 403 PINCTRL_PIN(19, "GPIO_SUS1"), 404 PINCTRL_PIN(20, "GPIO_SUS5"), 405 PINCTRL_PIN(21, "SEC_GPIO_SUS11"), 406 PINCTRL_PIN(22, "GPIO_SUS4"), 407 PINCTRL_PIN(23, "SEC_GPIO_SUS8"), 408 PINCTRL_PIN(24, "GPIO_SUS2"), 409 PINCTRL_PIN(25, "GPIO_SUS6"), 410 PINCTRL_PIN(26, "CX_PREQ_B"), 411 PINCTRL_PIN(27, "SEC_GPIO_SUS9"), 412 413 PINCTRL_PIN(30, "TRST_B"), 414 PINCTRL_PIN(31, "TCK"), 415 PINCTRL_PIN(32, "PROCHOT_B"), 416 PINCTRL_PIN(33, "SVIDO_DATA"), 417 PINCTRL_PIN(34, "TMS"), 418 PINCTRL_PIN(35, "CX_PRDY_B_2"), 419 PINCTRL_PIN(36, "TDO_2"), 420 PINCTRL_PIN(37, "CX_PRDY_B"), 421 PINCTRL_PIN(38, "SVIDO_ALERT_B"), 422 PINCTRL_PIN(39, "TDO"), 423 PINCTRL_PIN(40, "SVIDO_CLK"), 424 PINCTRL_PIN(41, "TDI"), 425 426 PINCTRL_PIN(45, "GP_CAMERASB_05"), 427 PINCTRL_PIN(46, "GP_CAMERASB_02"), 428 PINCTRL_PIN(47, "GP_CAMERASB_08"), 429 PINCTRL_PIN(48, "GP_CAMERASB_00"), 430 PINCTRL_PIN(49, "GP_CAMERASB_06"), 431 PINCTRL_PIN(50, "GP_CAMERASB_10"), 432 PINCTRL_PIN(51, "GP_CAMERASB_03"), 433 PINCTRL_PIN(52, "GP_CAMERASB_09"), 434 PINCTRL_PIN(53, "GP_CAMERASB_01"), 435 PINCTRL_PIN(54, "GP_CAMERASB_07"), 436 PINCTRL_PIN(55, "GP_CAMERASB_11"), 437 PINCTRL_PIN(56, "GP_CAMERASB_04"), 438 439 PINCTRL_PIN(60, "PANEL0_BKLTEN"), 440 PINCTRL_PIN(61, "HV_DDI0_HPD"), 441 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"), 442 PINCTRL_PIN(63, "PANEL1_BKLTCTL"), 443 PINCTRL_PIN(64, "HV_DDI1_HPD"), 444 PINCTRL_PIN(65, "PANEL0_BKLTCTL"), 445 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"), 446 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"), 447 PINCTRL_PIN(68, "HV_DDI2_HPD"), 448 PINCTRL_PIN(69, "PANEL1_VDDEN"), 449 PINCTRL_PIN(70, "PANEL1_BKLTEN"), 450 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"), 451 PINCTRL_PIN(72, "PANEL0_VDDEN"), 452 }; 453 454 static const struct chv_gpio_pinrange north_gpio_ranges[] = { 455 GPIO_PINRANGE(0, 8), 456 GPIO_PINRANGE(15, 27), 457 GPIO_PINRANGE(30, 41), 458 GPIO_PINRANGE(45, 56), 459 GPIO_PINRANGE(60, 72), 460 }; 461 462 static const struct chv_community north_community = { 463 .uid = "2", 464 .pins = north_pins, 465 .npins = ARRAY_SIZE(north_pins), 466 .gpio_ranges = north_gpio_ranges, 467 .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges), 468 /* 469 * North community can generate GPIO interrupts only for the first 470 * 8 interrupts. The upper half (8-15) can only be used to trigger 471 * GPEs. 472 */ 473 .nirqs = 8, 474 .acpi_space_id = 0x92, 475 }; 476 477 static const struct pinctrl_pin_desc east_pins[] = { 478 PINCTRL_PIN(0, "PMU_SLP_S3_B"), 479 PINCTRL_PIN(1, "PMU_BATLOW_B"), 480 PINCTRL_PIN(2, "SUS_STAT_B"), 481 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"), 482 PINCTRL_PIN(4, "PMU_AC_PRESENT"), 483 PINCTRL_PIN(5, "PMU_PLTRST_B"), 484 PINCTRL_PIN(6, "PMU_SUSCLK"), 485 PINCTRL_PIN(7, "PMU_SLP_LAN_B"), 486 PINCTRL_PIN(8, "PMU_PWRBTN_B"), 487 PINCTRL_PIN(9, "PMU_SLP_S4_B"), 488 PINCTRL_PIN(10, "PMU_WAKE_B"), 489 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"), 490 491 PINCTRL_PIN(15, "MF_ISH_GPIO_3"), 492 PINCTRL_PIN(16, "MF_ISH_GPIO_7"), 493 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"), 494 PINCTRL_PIN(18, "MF_ISH_GPIO_1"), 495 PINCTRL_PIN(19, "MF_ISH_GPIO_5"), 496 PINCTRL_PIN(20, "MF_ISH_GPIO_9"), 497 PINCTRL_PIN(21, "MF_ISH_GPIO_0"), 498 PINCTRL_PIN(22, "MF_ISH_GPIO_4"), 499 PINCTRL_PIN(23, "MF_ISH_GPIO_8"), 500 PINCTRL_PIN(24, "MF_ISH_GPIO_2"), 501 PINCTRL_PIN(25, "MF_ISH_GPIO_6"), 502 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"), 503 }; 504 505 static const struct chv_gpio_pinrange east_gpio_ranges[] = { 506 GPIO_PINRANGE(0, 11), 507 GPIO_PINRANGE(15, 26), 508 }; 509 510 static const struct chv_community east_community = { 511 .uid = "3", 512 .pins = east_pins, 513 .npins = ARRAY_SIZE(east_pins), 514 .gpio_ranges = east_gpio_ranges, 515 .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges), 516 .nirqs = 16, 517 .acpi_space_id = 0x93, 518 }; 519 520 static const struct pinctrl_pin_desc southeast_pins[] = { 521 PINCTRL_PIN(0, "MF_PLT_CLK0"), 522 PINCTRL_PIN(1, "PWM1"), 523 PINCTRL_PIN(2, "MF_PLT_CLK1"), 524 PINCTRL_PIN(3, "MF_PLT_CLK4"), 525 PINCTRL_PIN(4, "MF_PLT_CLK3"), 526 PINCTRL_PIN(5, "PWM0"), 527 PINCTRL_PIN(6, "MF_PLT_CLK5"), 528 PINCTRL_PIN(7, "MF_PLT_CLK2"), 529 530 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"), 531 PINCTRL_PIN(16, "SDMMC1_CLK"), 532 PINCTRL_PIN(17, "SDMMC1_D0"), 533 PINCTRL_PIN(18, "SDMMC2_D1"), 534 PINCTRL_PIN(19, "SDMMC2_CLK"), 535 PINCTRL_PIN(20, "SDMMC1_D2"), 536 PINCTRL_PIN(21, "SDMMC2_D2"), 537 PINCTRL_PIN(22, "SDMMC2_CMD"), 538 PINCTRL_PIN(23, "SDMMC1_CMD"), 539 PINCTRL_PIN(24, "SDMMC1_D1"), 540 PINCTRL_PIN(25, "SDMMC2_D0"), 541 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"), 542 543 PINCTRL_PIN(30, "SDMMC3_D1"), 544 PINCTRL_PIN(31, "SDMMC3_CLK"), 545 PINCTRL_PIN(32, "SDMMC3_D3"), 546 PINCTRL_PIN(33, "SDMMC3_D2"), 547 PINCTRL_PIN(34, "SDMMC3_CMD"), 548 PINCTRL_PIN(35, "SDMMC3_D0"), 549 550 PINCTRL_PIN(45, "MF_LPC_AD2"), 551 PINCTRL_PIN(46, "LPC_CLKRUNB"), 552 PINCTRL_PIN(47, "MF_LPC_AD0"), 553 PINCTRL_PIN(48, "LPC_FRAMEB"), 554 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"), 555 PINCTRL_PIN(50, "MF_LPC_AD3"), 556 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"), 557 PINCTRL_PIN(52, "MF_LPC_AD1"), 558 559 PINCTRL_PIN(60, "SPI1_MISO"), 560 PINCTRL_PIN(61, "SPI1_CSO_B"), 561 PINCTRL_PIN(62, "SPI1_CLK"), 562 PINCTRL_PIN(63, "MMC1_D6"), 563 PINCTRL_PIN(64, "SPI1_MOSI"), 564 PINCTRL_PIN(65, "MMC1_D5"), 565 PINCTRL_PIN(66, "SPI1_CS1_B"), 566 PINCTRL_PIN(67, "MMC1_D4_SD_WE"), 567 PINCTRL_PIN(68, "MMC1_D7"), 568 PINCTRL_PIN(69, "MMC1_RCLK"), 569 570 PINCTRL_PIN(75, "USB_OC1_B"), 571 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"), 572 PINCTRL_PIN(77, "GPIO_ALERT"), 573 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"), 574 PINCTRL_PIN(79, "ILB_SERIRQ"), 575 PINCTRL_PIN(80, "USB_OC0_B"), 576 PINCTRL_PIN(81, "SDMMC3_CD_B"), 577 PINCTRL_PIN(82, "SPKR"), 578 PINCTRL_PIN(83, "SUSPWRDNACK"), 579 PINCTRL_PIN(84, "SPARE_PIN"), 580 PINCTRL_PIN(85, "SDMMC3_1P8_EN"), 581 }; 582 583 static const unsigned southeast_pwm0_pins[] = { 5 }; 584 static const unsigned southeast_pwm1_pins[] = { 1 }; 585 static const unsigned southeast_sdmmc1_pins[] = { 586 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69, 587 }; 588 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 }; 589 static const unsigned southeast_sdmmc3_pins[] = { 590 30, 31, 32, 33, 34, 35, 78, 81, 85, 591 }; 592 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 }; 593 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 }; 594 595 static const struct chv_pingroup southeast_groups[] = { 596 PIN_GROUP_WITH_ALT("pwm0_grp", southeast_pwm0_pins, 1, false), 597 PIN_GROUP_WITH_ALT("pwm1_grp", southeast_pwm1_pins, 1, false), 598 PIN_GROUP_WITH_ALT("sdmmc1_grp", southeast_sdmmc1_pins, 1, false), 599 PIN_GROUP_WITH_ALT("sdmmc2_grp", southeast_sdmmc2_pins, 1, false), 600 PIN_GROUP_WITH_ALT("sdmmc3_grp", southeast_sdmmc3_pins, 1, false), 601 PIN_GROUP_WITH_ALT("spi1_grp", southeast_spi1_pins, 1, false), 602 PIN_GROUP_WITH_ALT("spi2_grp", southeast_spi2_pins, 4, false), 603 }; 604 605 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" }; 606 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" }; 607 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" }; 608 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" }; 609 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" }; 610 static const char * const southeast_spi1_groups[] = { "spi1_grp" }; 611 static const char * const southeast_spi2_groups[] = { "spi2_grp" }; 612 613 static const struct intel_function southeast_functions[] = { 614 FUNCTION("pwm0", southeast_pwm0_groups), 615 FUNCTION("pwm1", southeast_pwm1_groups), 616 FUNCTION("sdmmc1", southeast_sdmmc1_groups), 617 FUNCTION("sdmmc2", southeast_sdmmc2_groups), 618 FUNCTION("sdmmc3", southeast_sdmmc3_groups), 619 FUNCTION("spi1", southeast_spi1_groups), 620 FUNCTION("spi2", southeast_spi2_groups), 621 }; 622 623 static const struct chv_gpio_pinrange southeast_gpio_ranges[] = { 624 GPIO_PINRANGE(0, 7), 625 GPIO_PINRANGE(15, 26), 626 GPIO_PINRANGE(30, 35), 627 GPIO_PINRANGE(45, 52), 628 GPIO_PINRANGE(60, 69), 629 GPIO_PINRANGE(75, 85), 630 }; 631 632 static const struct chv_community southeast_community = { 633 .uid = "4", 634 .pins = southeast_pins, 635 .npins = ARRAY_SIZE(southeast_pins), 636 .groups = southeast_groups, 637 .ngroups = ARRAY_SIZE(southeast_groups), 638 .functions = southeast_functions, 639 .nfunctions = ARRAY_SIZE(southeast_functions), 640 .gpio_ranges = southeast_gpio_ranges, 641 .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges), 642 .nirqs = 16, 643 .acpi_space_id = 0x94, 644 }; 645 646 static const struct chv_community *chv_communities[] = { 647 &southwest_community, 648 &north_community, 649 &east_community, 650 &southeast_community, 651 }; 652 653 /* 654 * Lock to serialize register accesses 655 * 656 * Due to a silicon issue, a shared lock must be used to prevent 657 * concurrent accesses across the 4 GPIO controllers. 658 * 659 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005), 660 * errata #CHT34, for further information. 661 */ 662 static DEFINE_RAW_SPINLOCK(chv_lock); 663 664 static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned int offset, 665 unsigned int reg) 666 { 667 unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO; 668 unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO; 669 670 offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no + 671 GPIO_REGS_SIZE * pad_no; 672 673 return pctrl->regs + offset + reg; 674 } 675 676 static void chv_writel(u32 value, void __iomem *reg) 677 { 678 writel(value, reg); 679 /* simple readback to confirm the bus transferring done */ 680 readl(reg); 681 } 682 683 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */ 684 static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned int offset) 685 { 686 void __iomem *reg; 687 688 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1); 689 return readl(reg) & CHV_PADCTRL1_CFGLOCK; 690 } 691 692 static int chv_get_groups_count(struct pinctrl_dev *pctldev) 693 { 694 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 695 696 return pctrl->community->ngroups; 697 } 698 699 static const char *chv_get_group_name(struct pinctrl_dev *pctldev, 700 unsigned int group) 701 { 702 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 703 704 return pctrl->community->groups[group].name; 705 } 706 707 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, 708 const unsigned int **pins, unsigned int *npins) 709 { 710 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 711 712 *pins = pctrl->community->groups[group].pins; 713 *npins = pctrl->community->groups[group].npins; 714 return 0; 715 } 716 717 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 718 unsigned int offset) 719 { 720 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 721 unsigned long flags; 722 u32 ctrl0, ctrl1; 723 bool locked; 724 725 raw_spin_lock_irqsave(&chv_lock, flags); 726 727 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); 728 ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1)); 729 locked = chv_pad_locked(pctrl, offset); 730 731 raw_spin_unlock_irqrestore(&chv_lock, flags); 732 733 if (ctrl0 & CHV_PADCTRL0_GPIOEN) { 734 seq_puts(s, "GPIO "); 735 } else { 736 u32 mode; 737 738 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK; 739 mode >>= CHV_PADCTRL0_PMODE_SHIFT; 740 741 seq_printf(s, "mode %d ", mode); 742 } 743 744 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1); 745 746 if (locked) 747 seq_puts(s, " [LOCKED]"); 748 } 749 750 static const struct pinctrl_ops chv_pinctrl_ops = { 751 .get_groups_count = chv_get_groups_count, 752 .get_group_name = chv_get_group_name, 753 .get_group_pins = chv_get_group_pins, 754 .pin_dbg_show = chv_pin_dbg_show, 755 }; 756 757 static int chv_get_functions_count(struct pinctrl_dev *pctldev) 758 { 759 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 760 761 return pctrl->community->nfunctions; 762 } 763 764 static const char *chv_get_function_name(struct pinctrl_dev *pctldev, 765 unsigned int function) 766 { 767 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 768 769 return pctrl->community->functions[function].name; 770 } 771 772 static int chv_get_function_groups(struct pinctrl_dev *pctldev, 773 unsigned int function, 774 const char * const **groups, 775 unsigned int * const ngroups) 776 { 777 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 778 779 *groups = pctrl->community->functions[function].groups; 780 *ngroups = pctrl->community->functions[function].ngroups; 781 return 0; 782 } 783 784 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, 785 unsigned int function, unsigned int group) 786 { 787 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 788 const struct chv_pingroup *grp; 789 unsigned long flags; 790 int i; 791 792 grp = &pctrl->community->groups[group]; 793 794 raw_spin_lock_irqsave(&chv_lock, flags); 795 796 /* Check first that the pad is not locked */ 797 for (i = 0; i < grp->npins; i++) { 798 if (chv_pad_locked(pctrl, grp->pins[i])) { 799 dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n", 800 grp->pins[i]); 801 raw_spin_unlock_irqrestore(&chv_lock, flags); 802 return -EBUSY; 803 } 804 } 805 806 for (i = 0; i < grp->npins; i++) { 807 const struct chv_alternate_function *altfunc = &grp->altfunc; 808 int pin = grp->pins[i]; 809 void __iomem *reg; 810 u32 value; 811 812 /* Check if there is pin-specific config */ 813 if (grp->overrides) { 814 int j; 815 816 for (j = 0; j < grp->noverrides; j++) { 817 if (grp->overrides[j].pin == pin) { 818 altfunc = &grp->overrides[j]; 819 break; 820 } 821 } 822 } 823 824 reg = chv_padreg(pctrl, pin, CHV_PADCTRL0); 825 value = readl(reg); 826 /* Disable GPIO mode */ 827 value &= ~CHV_PADCTRL0_GPIOEN; 828 /* Set to desired mode */ 829 value &= ~CHV_PADCTRL0_PMODE_MASK; 830 value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT; 831 chv_writel(value, reg); 832 833 /* Update for invert_oe */ 834 reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); 835 value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK; 836 if (altfunc->invert_oe) 837 value |= CHV_PADCTRL1_INVRXTX_TXENABLE; 838 chv_writel(value, reg); 839 840 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n", 841 pin, altfunc->mode, altfunc->invert_oe ? "" : "not "); 842 } 843 844 raw_spin_unlock_irqrestore(&chv_lock, flags); 845 846 return 0; 847 } 848 849 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev, 850 struct pinctrl_gpio_range *range, 851 unsigned int offset) 852 { 853 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 854 unsigned long flags; 855 void __iomem *reg; 856 u32 value; 857 858 raw_spin_lock_irqsave(&chv_lock, flags); 859 860 if (chv_pad_locked(pctrl, offset)) { 861 value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); 862 if (!(value & CHV_PADCTRL0_GPIOEN)) { 863 /* Locked so cannot enable */ 864 raw_spin_unlock_irqrestore(&chv_lock, flags); 865 return -EBUSY; 866 } 867 } else { 868 int i; 869 870 /* Reset the interrupt mapping */ 871 for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) { 872 if (pctrl->intr_lines[i] == offset) { 873 pctrl->intr_lines[i] = 0; 874 break; 875 } 876 } 877 878 /* Disable interrupt generation */ 879 reg = chv_padreg(pctrl, offset, CHV_PADCTRL1); 880 value = readl(reg); 881 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 882 value &= ~CHV_PADCTRL1_INVRXTX_MASK; 883 chv_writel(value, reg); 884 885 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); 886 value = readl(reg); 887 888 /* 889 * If the pin is in HiZ mode (both TX and RX buffers are 890 * disabled) we turn it to be input now. 891 */ 892 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) == 893 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) { 894 value &= ~CHV_PADCTRL0_GPIOCFG_MASK; 895 value |= CHV_PADCTRL0_GPIOCFG_GPI << 896 CHV_PADCTRL0_GPIOCFG_SHIFT; 897 } 898 899 /* Switch to a GPIO mode */ 900 value |= CHV_PADCTRL0_GPIOEN; 901 chv_writel(value, reg); 902 } 903 904 raw_spin_unlock_irqrestore(&chv_lock, flags); 905 906 return 0; 907 } 908 909 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev, 910 struct pinctrl_gpio_range *range, 911 unsigned int offset) 912 { 913 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 914 unsigned long flags; 915 void __iomem *reg; 916 u32 value; 917 918 raw_spin_lock_irqsave(&chv_lock, flags); 919 920 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); 921 value = readl(reg) & ~CHV_PADCTRL0_GPIOEN; 922 chv_writel(value, reg); 923 924 raw_spin_unlock_irqrestore(&chv_lock, flags); 925 } 926 927 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev, 928 struct pinctrl_gpio_range *range, 929 unsigned int offset, bool input) 930 { 931 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 932 void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); 933 unsigned long flags; 934 u32 ctrl0; 935 936 raw_spin_lock_irqsave(&chv_lock, flags); 937 938 ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK; 939 if (input) 940 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; 941 else 942 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT; 943 chv_writel(ctrl0, reg); 944 945 raw_spin_unlock_irqrestore(&chv_lock, flags); 946 947 return 0; 948 } 949 950 static const struct pinmux_ops chv_pinmux_ops = { 951 .get_functions_count = chv_get_functions_count, 952 .get_function_name = chv_get_function_name, 953 .get_function_groups = chv_get_function_groups, 954 .set_mux = chv_pinmux_set_mux, 955 .gpio_request_enable = chv_gpio_request_enable, 956 .gpio_disable_free = chv_gpio_disable_free, 957 .gpio_set_direction = chv_gpio_set_direction, 958 }; 959 960 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 961 unsigned long *config) 962 { 963 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 964 enum pin_config_param param = pinconf_to_config_param(*config); 965 unsigned long flags; 966 u32 ctrl0, ctrl1; 967 u16 arg = 0; 968 u32 term; 969 970 raw_spin_lock_irqsave(&chv_lock, flags); 971 ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); 972 ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1)); 973 raw_spin_unlock_irqrestore(&chv_lock, flags); 974 975 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT; 976 977 switch (param) { 978 case PIN_CONFIG_BIAS_DISABLE: 979 if (term) 980 return -EINVAL; 981 break; 982 983 case PIN_CONFIG_BIAS_PULL_UP: 984 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP)) 985 return -EINVAL; 986 987 switch (term) { 988 case CHV_PADCTRL0_TERM_20K: 989 arg = 20000; 990 break; 991 case CHV_PADCTRL0_TERM_5K: 992 arg = 5000; 993 break; 994 case CHV_PADCTRL0_TERM_1K: 995 arg = 1000; 996 break; 997 } 998 999 break; 1000 1001 case PIN_CONFIG_BIAS_PULL_DOWN: 1002 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP)) 1003 return -EINVAL; 1004 1005 switch (term) { 1006 case CHV_PADCTRL0_TERM_20K: 1007 arg = 20000; 1008 break; 1009 case CHV_PADCTRL0_TERM_5K: 1010 arg = 5000; 1011 break; 1012 } 1013 1014 break; 1015 1016 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 1017 if (!(ctrl1 & CHV_PADCTRL1_ODEN)) 1018 return -EINVAL; 1019 break; 1020 1021 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: { 1022 u32 cfg; 1023 1024 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1025 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1026 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ) 1027 return -EINVAL; 1028 1029 break; 1030 } 1031 1032 default: 1033 return -ENOTSUPP; 1034 } 1035 1036 *config = pinconf_to_config_packed(param, arg); 1037 return 0; 1038 } 1039 1040 static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned int pin, 1041 enum pin_config_param param, u32 arg) 1042 { 1043 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0); 1044 unsigned long flags; 1045 u32 ctrl0, pull; 1046 1047 raw_spin_lock_irqsave(&chv_lock, flags); 1048 ctrl0 = readl(reg); 1049 1050 switch (param) { 1051 case PIN_CONFIG_BIAS_DISABLE: 1052 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 1053 break; 1054 1055 case PIN_CONFIG_BIAS_PULL_UP: 1056 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 1057 1058 switch (arg) { 1059 case 1000: 1060 /* For 1k there is only pull up */ 1061 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT; 1062 break; 1063 case 5000: 1064 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 1065 break; 1066 case 20000: 1067 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 1068 break; 1069 default: 1070 raw_spin_unlock_irqrestore(&chv_lock, flags); 1071 return -EINVAL; 1072 } 1073 1074 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull; 1075 break; 1076 1077 case PIN_CONFIG_BIAS_PULL_DOWN: 1078 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 1079 1080 switch (arg) { 1081 case 5000: 1082 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 1083 break; 1084 case 20000: 1085 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 1086 break; 1087 default: 1088 raw_spin_unlock_irqrestore(&chv_lock, flags); 1089 return -EINVAL; 1090 } 1091 1092 ctrl0 |= pull; 1093 break; 1094 1095 default: 1096 raw_spin_unlock_irqrestore(&chv_lock, flags); 1097 return -EINVAL; 1098 } 1099 1100 chv_writel(ctrl0, reg); 1101 raw_spin_unlock_irqrestore(&chv_lock, flags); 1102 1103 return 0; 1104 } 1105 1106 static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin, 1107 bool enable) 1108 { 1109 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); 1110 unsigned long flags; 1111 u32 ctrl1; 1112 1113 raw_spin_lock_irqsave(&chv_lock, flags); 1114 ctrl1 = readl(reg); 1115 1116 if (enable) 1117 ctrl1 |= CHV_PADCTRL1_ODEN; 1118 else 1119 ctrl1 &= ~CHV_PADCTRL1_ODEN; 1120 1121 chv_writel(ctrl1, reg); 1122 raw_spin_unlock_irqrestore(&chv_lock, flags); 1123 1124 return 0; 1125 } 1126 1127 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin, 1128 unsigned long *configs, unsigned int nconfigs) 1129 { 1130 struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 1131 enum pin_config_param param; 1132 int i, ret; 1133 u32 arg; 1134 1135 if (chv_pad_locked(pctrl, pin)) 1136 return -EBUSY; 1137 1138 for (i = 0; i < nconfigs; i++) { 1139 param = pinconf_to_config_param(configs[i]); 1140 arg = pinconf_to_config_argument(configs[i]); 1141 1142 switch (param) { 1143 case PIN_CONFIG_BIAS_DISABLE: 1144 case PIN_CONFIG_BIAS_PULL_UP: 1145 case PIN_CONFIG_BIAS_PULL_DOWN: 1146 ret = chv_config_set_pull(pctrl, pin, param, arg); 1147 if (ret) 1148 return ret; 1149 break; 1150 1151 case PIN_CONFIG_DRIVE_PUSH_PULL: 1152 ret = chv_config_set_oden(pctrl, pin, false); 1153 if (ret) 1154 return ret; 1155 break; 1156 1157 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 1158 ret = chv_config_set_oden(pctrl, pin, true); 1159 if (ret) 1160 return ret; 1161 break; 1162 1163 default: 1164 return -ENOTSUPP; 1165 } 1166 1167 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin, 1168 param, arg); 1169 } 1170 1171 return 0; 1172 } 1173 1174 static int chv_config_group_get(struct pinctrl_dev *pctldev, 1175 unsigned int group, 1176 unsigned long *config) 1177 { 1178 const unsigned int *pins; 1179 unsigned int npins; 1180 int ret; 1181 1182 ret = chv_get_group_pins(pctldev, group, &pins, &npins); 1183 if (ret) 1184 return ret; 1185 1186 ret = chv_config_get(pctldev, pins[0], config); 1187 if (ret) 1188 return ret; 1189 1190 return 0; 1191 } 1192 1193 static int chv_config_group_set(struct pinctrl_dev *pctldev, 1194 unsigned int group, unsigned long *configs, 1195 unsigned int num_configs) 1196 { 1197 const unsigned int *pins; 1198 unsigned int npins; 1199 int i, ret; 1200 1201 ret = chv_get_group_pins(pctldev, group, &pins, &npins); 1202 if (ret) 1203 return ret; 1204 1205 for (i = 0; i < npins; i++) { 1206 ret = chv_config_set(pctldev, pins[i], configs, num_configs); 1207 if (ret) 1208 return ret; 1209 } 1210 1211 return 0; 1212 } 1213 1214 static const struct pinconf_ops chv_pinconf_ops = { 1215 .is_generic = true, 1216 .pin_config_set = chv_config_set, 1217 .pin_config_get = chv_config_get, 1218 .pin_config_group_get = chv_config_group_get, 1219 .pin_config_group_set = chv_config_group_set, 1220 }; 1221 1222 static struct pinctrl_desc chv_pinctrl_desc = { 1223 .pctlops = &chv_pinctrl_ops, 1224 .pmxops = &chv_pinmux_ops, 1225 .confops = &chv_pinconf_ops, 1226 .owner = THIS_MODULE, 1227 }; 1228 1229 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset) 1230 { 1231 struct chv_pinctrl *pctrl = gpiochip_get_data(chip); 1232 unsigned long flags; 1233 u32 ctrl0, cfg; 1234 1235 raw_spin_lock_irqsave(&chv_lock, flags); 1236 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); 1237 raw_spin_unlock_irqrestore(&chv_lock, flags); 1238 1239 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1240 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1241 1242 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO) 1243 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE); 1244 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE); 1245 } 1246 1247 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) 1248 { 1249 struct chv_pinctrl *pctrl = gpiochip_get_data(chip); 1250 unsigned long flags; 1251 void __iomem *reg; 1252 u32 ctrl0; 1253 1254 raw_spin_lock_irqsave(&chv_lock, flags); 1255 1256 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0); 1257 ctrl0 = readl(reg); 1258 1259 if (value) 1260 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE; 1261 else 1262 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE; 1263 1264 chv_writel(ctrl0, reg); 1265 1266 raw_spin_unlock_irqrestore(&chv_lock, flags); 1267 } 1268 1269 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 1270 { 1271 struct chv_pinctrl *pctrl = gpiochip_get_data(chip); 1272 u32 ctrl0, direction; 1273 unsigned long flags; 1274 1275 raw_spin_lock_irqsave(&chv_lock, flags); 1276 ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0)); 1277 raw_spin_unlock_irqrestore(&chv_lock, flags); 1278 1279 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1280 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1281 1282 return direction != CHV_PADCTRL0_GPIOCFG_GPO; 1283 } 1284 1285 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) 1286 { 1287 return pinctrl_gpio_direction_input(chip->base + offset); 1288 } 1289 1290 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, 1291 int value) 1292 { 1293 chv_gpio_set(chip, offset, value); 1294 return pinctrl_gpio_direction_output(chip->base + offset); 1295 } 1296 1297 static const struct gpio_chip chv_gpio_chip = { 1298 .owner = THIS_MODULE, 1299 .request = gpiochip_generic_request, 1300 .free = gpiochip_generic_free, 1301 .get_direction = chv_gpio_get_direction, 1302 .direction_input = chv_gpio_direction_input, 1303 .direction_output = chv_gpio_direction_output, 1304 .get = chv_gpio_get, 1305 .set = chv_gpio_set, 1306 }; 1307 1308 static void chv_gpio_irq_ack(struct irq_data *d) 1309 { 1310 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1311 struct chv_pinctrl *pctrl = gpiochip_get_data(gc); 1312 int pin = irqd_to_hwirq(d); 1313 u32 intr_line; 1314 1315 raw_spin_lock(&chv_lock); 1316 1317 intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); 1318 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1319 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1320 chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT); 1321 1322 raw_spin_unlock(&chv_lock); 1323 } 1324 1325 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask) 1326 { 1327 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1328 struct chv_pinctrl *pctrl = gpiochip_get_data(gc); 1329 int pin = irqd_to_hwirq(d); 1330 u32 value, intr_line; 1331 unsigned long flags; 1332 1333 raw_spin_lock_irqsave(&chv_lock, flags); 1334 1335 intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); 1336 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1337 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1338 1339 value = readl(pctrl->regs + CHV_INTMASK); 1340 if (mask) 1341 value &= ~BIT(intr_line); 1342 else 1343 value |= BIT(intr_line); 1344 chv_writel(value, pctrl->regs + CHV_INTMASK); 1345 1346 raw_spin_unlock_irqrestore(&chv_lock, flags); 1347 } 1348 1349 static void chv_gpio_irq_mask(struct irq_data *d) 1350 { 1351 chv_gpio_irq_mask_unmask(d, true); 1352 } 1353 1354 static void chv_gpio_irq_unmask(struct irq_data *d) 1355 { 1356 chv_gpio_irq_mask_unmask(d, false); 1357 } 1358 1359 static unsigned chv_gpio_irq_startup(struct irq_data *d) 1360 { 1361 /* 1362 * Check if the interrupt has been requested with 0 as triggering 1363 * type. In that case it is assumed that the current values 1364 * programmed to the hardware are used (e.g BIOS configured 1365 * defaults). 1366 * 1367 * In that case ->irq_set_type() will never be called so we need to 1368 * read back the values from hardware now, set correct flow handler 1369 * and update mappings before the interrupt is being used. 1370 */ 1371 if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) { 1372 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1373 struct chv_pinctrl *pctrl = gpiochip_get_data(gc); 1374 unsigned int pin = irqd_to_hwirq(d); 1375 irq_flow_handler_t handler; 1376 unsigned long flags; 1377 u32 intsel, value; 1378 1379 raw_spin_lock_irqsave(&chv_lock, flags); 1380 intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); 1381 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1382 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1383 1384 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1)); 1385 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL) 1386 handler = handle_level_irq; 1387 else 1388 handler = handle_edge_irq; 1389 1390 if (!pctrl->intr_lines[intsel]) { 1391 irq_set_handler_locked(d, handler); 1392 pctrl->intr_lines[intsel] = pin; 1393 } 1394 raw_spin_unlock_irqrestore(&chv_lock, flags); 1395 } 1396 1397 chv_gpio_irq_unmask(d); 1398 return 0; 1399 } 1400 1401 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type) 1402 { 1403 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1404 struct chv_pinctrl *pctrl = gpiochip_get_data(gc); 1405 unsigned int pin = irqd_to_hwirq(d); 1406 unsigned long flags; 1407 u32 value; 1408 1409 raw_spin_lock_irqsave(&chv_lock, flags); 1410 1411 /* 1412 * Pins which can be used as shared interrupt are configured in 1413 * BIOS. Driver trusts BIOS configurations and assigns different 1414 * handler according to the irq type. 1415 * 1416 * Driver needs to save the mapping between each pin and 1417 * its interrupt line. 1418 * 1. If the pin cfg is locked in BIOS: 1419 * Trust BIOS has programmed IntWakeCfg bits correctly, 1420 * driver just needs to save the mapping. 1421 * 2. If the pin cfg is not locked in BIOS: 1422 * Driver programs the IntWakeCfg bits and save the mapping. 1423 */ 1424 if (!chv_pad_locked(pctrl, pin)) { 1425 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1); 1426 1427 value = readl(reg); 1428 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 1429 value &= ~CHV_PADCTRL1_INVRXTX_MASK; 1430 1431 if (type & IRQ_TYPE_EDGE_BOTH) { 1432 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) 1433 value |= CHV_PADCTRL1_INTWAKECFG_BOTH; 1434 else if (type & IRQ_TYPE_EDGE_RISING) 1435 value |= CHV_PADCTRL1_INTWAKECFG_RISING; 1436 else if (type & IRQ_TYPE_EDGE_FALLING) 1437 value |= CHV_PADCTRL1_INTWAKECFG_FALLING; 1438 } else if (type & IRQ_TYPE_LEVEL_MASK) { 1439 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL; 1440 if (type & IRQ_TYPE_LEVEL_LOW) 1441 value |= CHV_PADCTRL1_INVRXTX_RXDATA; 1442 } 1443 1444 chv_writel(value, reg); 1445 } 1446 1447 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0)); 1448 value &= CHV_PADCTRL0_INTSEL_MASK; 1449 value >>= CHV_PADCTRL0_INTSEL_SHIFT; 1450 1451 pctrl->intr_lines[value] = pin; 1452 1453 if (type & IRQ_TYPE_EDGE_BOTH) 1454 irq_set_handler_locked(d, handle_edge_irq); 1455 else if (type & IRQ_TYPE_LEVEL_MASK) 1456 irq_set_handler_locked(d, handle_level_irq); 1457 1458 raw_spin_unlock_irqrestore(&chv_lock, flags); 1459 1460 return 0; 1461 } 1462 1463 static struct irq_chip chv_gpio_irqchip = { 1464 .name = "chv-gpio", 1465 .irq_startup = chv_gpio_irq_startup, 1466 .irq_ack = chv_gpio_irq_ack, 1467 .irq_mask = chv_gpio_irq_mask, 1468 .irq_unmask = chv_gpio_irq_unmask, 1469 .irq_set_type = chv_gpio_irq_type, 1470 .flags = IRQCHIP_SKIP_SET_WAKE, 1471 }; 1472 1473 static void chv_gpio_irq_handler(struct irq_desc *desc) 1474 { 1475 struct gpio_chip *gc = irq_desc_get_handler_data(desc); 1476 struct chv_pinctrl *pctrl = gpiochip_get_data(gc); 1477 struct irq_chip *chip = irq_desc_get_chip(desc); 1478 unsigned long pending; 1479 u32 intr_line; 1480 1481 chained_irq_enter(chip, desc); 1482 1483 pending = readl(pctrl->regs + CHV_INTSTAT); 1484 for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) { 1485 unsigned irq, offset; 1486 1487 offset = pctrl->intr_lines[intr_line]; 1488 irq = irq_find_mapping(gc->irq.domain, offset); 1489 generic_handle_irq(irq); 1490 } 1491 1492 chained_irq_exit(chip, desc); 1493 } 1494 1495 /* 1496 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI 1497 * tables. Since we leave GPIOs that are not capable of generating 1498 * interrupts out of the irqdomain the numbering will be different and 1499 * cause devices using the hardcoded IRQ numbers fail. In order not to 1500 * break such machines we will only mask pins from irqdomain if the machine 1501 * is not listed below. 1502 */ 1503 static const struct dmi_system_id chv_no_valid_mask[] = { 1504 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */ 1505 { 1506 .ident = "Intel_Strago based Chromebooks (All models)", 1507 .matches = { 1508 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1509 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"), 1510 DMI_MATCH(DMI_BOARD_VERSION, "1.0"), 1511 }, 1512 }, 1513 { 1514 .ident = "HP Chromebook 11 G5 (Setzer)", 1515 .matches = { 1516 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 1517 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"), 1518 DMI_MATCH(DMI_BOARD_VERSION, "1.0"), 1519 }, 1520 }, 1521 { 1522 .ident = "Acer Chromebook R11 (Cyan)", 1523 .matches = { 1524 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1525 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"), 1526 DMI_MATCH(DMI_BOARD_VERSION, "1.0"), 1527 }, 1528 }, 1529 { 1530 .ident = "Samsung Chromebook 3 (Celes)", 1531 .matches = { 1532 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1533 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), 1534 DMI_MATCH(DMI_BOARD_VERSION, "1.0"), 1535 }, 1536 }, 1537 {} 1538 }; 1539 1540 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq) 1541 { 1542 const struct chv_gpio_pinrange *range; 1543 struct gpio_chip *chip = &pctrl->chip; 1544 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask); 1545 const struct chv_community *community = pctrl->community; 1546 int ret, i, irq_base; 1547 1548 *chip = chv_gpio_chip; 1549 1550 chip->ngpio = community->pins[community->npins - 1].number + 1; 1551 chip->label = dev_name(pctrl->dev); 1552 chip->parent = pctrl->dev; 1553 chip->base = -1; 1554 chip->irq.need_valid_mask = need_valid_mask; 1555 1556 ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl); 1557 if (ret) { 1558 dev_err(pctrl->dev, "Failed to register gpiochip\n"); 1559 return ret; 1560 } 1561 1562 for (i = 0; i < community->ngpio_ranges; i++) { 1563 range = &community->gpio_ranges[i]; 1564 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev), 1565 range->base, range->base, 1566 range->npins); 1567 if (ret) { 1568 dev_err(pctrl->dev, "failed to add GPIO pin range\n"); 1569 return ret; 1570 } 1571 } 1572 1573 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */ 1574 for (i = 0; i < community->npins; i++) { 1575 const struct pinctrl_pin_desc *desc; 1576 u32 intsel; 1577 1578 desc = &community->pins[i]; 1579 1580 intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0)); 1581 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1582 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1583 1584 if (need_valid_mask && intsel >= community->nirqs) 1585 clear_bit(i, chip->irq.valid_mask); 1586 } 1587 1588 /* 1589 * The same set of machines in chv_no_valid_mask[] have incorrectly 1590 * configured GPIOs that generate spurious interrupts so we use 1591 * this same list to apply another quirk for them. 1592 * 1593 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953. 1594 */ 1595 if (!need_valid_mask) { 1596 /* 1597 * Mask all interrupts the community is able to generate 1598 * but leave the ones that can only generate GPEs unmasked. 1599 */ 1600 chv_writel(GENMASK(31, pctrl->community->nirqs), 1601 pctrl->regs + CHV_INTMASK); 1602 } 1603 1604 /* Clear all interrupts */ 1605 chv_writel(0xffff, pctrl->regs + CHV_INTSTAT); 1606 1607 if (!need_valid_mask) { 1608 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0, 1609 community->npins, NUMA_NO_NODE); 1610 if (irq_base < 0) { 1611 dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n"); 1612 return irq_base; 1613 } 1614 } 1615 1616 ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0, 1617 handle_bad_irq, IRQ_TYPE_NONE); 1618 if (ret) { 1619 dev_err(pctrl->dev, "failed to add IRQ chip\n"); 1620 return ret; 1621 } 1622 1623 if (!need_valid_mask) { 1624 for (i = 0; i < community->ngpio_ranges; i++) { 1625 range = &community->gpio_ranges[i]; 1626 1627 irq_domain_associate_many(chip->irq.domain, irq_base, 1628 range->base, range->npins); 1629 irq_base += range->npins; 1630 } 1631 } 1632 1633 gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq, 1634 chv_gpio_irq_handler); 1635 return 0; 1636 } 1637 1638 static acpi_status chv_pinctrl_mmio_access_handler(u32 function, 1639 acpi_physical_address address, u32 bits, u64 *value, 1640 void *handler_context, void *region_context) 1641 { 1642 struct chv_pinctrl *pctrl = region_context; 1643 unsigned long flags; 1644 acpi_status ret = AE_OK; 1645 1646 raw_spin_lock_irqsave(&chv_lock, flags); 1647 1648 if (function == ACPI_WRITE) 1649 chv_writel((u32)(*value), pctrl->regs + (u32)address); 1650 else if (function == ACPI_READ) 1651 *value = readl(pctrl->regs + (u32)address); 1652 else 1653 ret = AE_BAD_PARAMETER; 1654 1655 raw_spin_unlock_irqrestore(&chv_lock, flags); 1656 1657 return ret; 1658 } 1659 1660 static int chv_pinctrl_probe(struct platform_device *pdev) 1661 { 1662 struct chv_pinctrl *pctrl; 1663 struct acpi_device *adev; 1664 struct resource *res; 1665 acpi_status status; 1666 int ret, irq, i; 1667 1668 adev = ACPI_COMPANION(&pdev->dev); 1669 if (!adev) 1670 return -ENODEV; 1671 1672 pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL); 1673 if (!pctrl) 1674 return -ENOMEM; 1675 1676 for (i = 0; i < ARRAY_SIZE(chv_communities); i++) 1677 if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) { 1678 pctrl->community = chv_communities[i]; 1679 break; 1680 } 1681 if (i == ARRAY_SIZE(chv_communities)) 1682 return -ENODEV; 1683 1684 pctrl->dev = &pdev->dev; 1685 1686 #ifdef CONFIG_PM_SLEEP 1687 pctrl->saved_pin_context = devm_kcalloc(pctrl->dev, 1688 pctrl->community->npins, sizeof(*pctrl->saved_pin_context), 1689 GFP_KERNEL); 1690 if (!pctrl->saved_pin_context) 1691 return -ENOMEM; 1692 #endif 1693 1694 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 1695 pctrl->regs = devm_ioremap_resource(&pdev->dev, res); 1696 if (IS_ERR(pctrl->regs)) 1697 return PTR_ERR(pctrl->regs); 1698 1699 irq = platform_get_irq(pdev, 0); 1700 if (irq < 0) { 1701 dev_err(&pdev->dev, "failed to get interrupt number\n"); 1702 return irq; 1703 } 1704 1705 pctrl->pctldesc = chv_pinctrl_desc; 1706 pctrl->pctldesc.name = dev_name(&pdev->dev); 1707 pctrl->pctldesc.pins = pctrl->community->pins; 1708 pctrl->pctldesc.npins = pctrl->community->npins; 1709 1710 pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc, 1711 pctrl); 1712 if (IS_ERR(pctrl->pctldev)) { 1713 dev_err(&pdev->dev, "failed to register pinctrl driver\n"); 1714 return PTR_ERR(pctrl->pctldev); 1715 } 1716 1717 ret = chv_gpio_probe(pctrl, irq); 1718 if (ret) 1719 return ret; 1720 1721 status = acpi_install_address_space_handler(adev->handle, 1722 pctrl->community->acpi_space_id, 1723 chv_pinctrl_mmio_access_handler, 1724 NULL, pctrl); 1725 if (ACPI_FAILURE(status)) 1726 dev_err(&pdev->dev, "failed to install ACPI addr space handler\n"); 1727 1728 platform_set_drvdata(pdev, pctrl); 1729 1730 return 0; 1731 } 1732 1733 static int chv_pinctrl_remove(struct platform_device *pdev) 1734 { 1735 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); 1736 1737 acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev), 1738 pctrl->community->acpi_space_id, 1739 chv_pinctrl_mmio_access_handler); 1740 1741 return 0; 1742 } 1743 1744 #ifdef CONFIG_PM_SLEEP 1745 static int chv_pinctrl_suspend_noirq(struct device *dev) 1746 { 1747 struct platform_device *pdev = to_platform_device(dev); 1748 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); 1749 unsigned long flags; 1750 int i; 1751 1752 raw_spin_lock_irqsave(&chv_lock, flags); 1753 1754 pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK); 1755 1756 for (i = 0; i < pctrl->community->npins; i++) { 1757 const struct pinctrl_pin_desc *desc; 1758 struct chv_pin_context *ctx; 1759 void __iomem *reg; 1760 1761 desc = &pctrl->community->pins[i]; 1762 if (chv_pad_locked(pctrl, desc->number)) 1763 continue; 1764 1765 ctx = &pctrl->saved_pin_context[i]; 1766 1767 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0); 1768 ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE; 1769 1770 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1); 1771 ctx->padctrl1 = readl(reg); 1772 } 1773 1774 raw_spin_unlock_irqrestore(&chv_lock, flags); 1775 1776 return 0; 1777 } 1778 1779 static int chv_pinctrl_resume_noirq(struct device *dev) 1780 { 1781 struct platform_device *pdev = to_platform_device(dev); 1782 struct chv_pinctrl *pctrl = platform_get_drvdata(pdev); 1783 unsigned long flags; 1784 int i; 1785 1786 raw_spin_lock_irqsave(&chv_lock, flags); 1787 1788 /* 1789 * Mask all interrupts before restoring per-pin configuration 1790 * registers because we don't know in which state BIOS left them 1791 * upon exiting suspend. 1792 */ 1793 chv_writel(0, pctrl->regs + CHV_INTMASK); 1794 1795 for (i = 0; i < pctrl->community->npins; i++) { 1796 const struct pinctrl_pin_desc *desc; 1797 const struct chv_pin_context *ctx; 1798 void __iomem *reg; 1799 u32 val; 1800 1801 desc = &pctrl->community->pins[i]; 1802 if (chv_pad_locked(pctrl, desc->number)) 1803 continue; 1804 1805 ctx = &pctrl->saved_pin_context[i]; 1806 1807 /* Only restore if our saved state differs from the current */ 1808 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0); 1809 val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE; 1810 if (ctx->padctrl0 != val) { 1811 chv_writel(ctx->padctrl0, reg); 1812 dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n", 1813 desc->number, readl(reg)); 1814 } 1815 1816 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1); 1817 val = readl(reg); 1818 if (ctx->padctrl1 != val) { 1819 chv_writel(ctx->padctrl1, reg); 1820 dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n", 1821 desc->number, readl(reg)); 1822 } 1823 } 1824 1825 /* 1826 * Now that all pins are restored to known state, we can restore 1827 * the interrupt mask register as well. 1828 */ 1829 chv_writel(0xffff, pctrl->regs + CHV_INTSTAT); 1830 chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK); 1831 1832 raw_spin_unlock_irqrestore(&chv_lock, flags); 1833 1834 return 0; 1835 } 1836 #endif 1837 1838 static const struct dev_pm_ops chv_pinctrl_pm_ops = { 1839 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq, 1840 chv_pinctrl_resume_noirq) 1841 }; 1842 1843 static const struct acpi_device_id chv_pinctrl_acpi_match[] = { 1844 { "INT33FF" }, 1845 { } 1846 }; 1847 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); 1848 1849 static struct platform_driver chv_pinctrl_driver = { 1850 .probe = chv_pinctrl_probe, 1851 .remove = chv_pinctrl_remove, 1852 .driver = { 1853 .name = "cherryview-pinctrl", 1854 .pm = &chv_pinctrl_pm_ops, 1855 .acpi_match_table = chv_pinctrl_acpi_match, 1856 }, 1857 }; 1858 1859 static int __init chv_pinctrl_init(void) 1860 { 1861 return platform_driver_register(&chv_pinctrl_driver); 1862 } 1863 subsys_initcall(chv_pinctrl_init); 1864 1865 static void __exit chv_pinctrl_exit(void) 1866 { 1867 platform_driver_unregister(&chv_pinctrl_driver); 1868 } 1869 module_exit(chv_pinctrl_exit); 1870 1871 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 1872 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver"); 1873 MODULE_LICENSE("GPL v2"); 1874