1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Cherryview/Braswell pinctrl driver 4 * 5 * Copyright (C) 2014, 2020 Intel Corporation 6 * Author: Mika Westerberg <[email protected]> 7 * 8 * This driver is based on the original Cherryview GPIO driver by 9 * Ning Li <[email protected]> 10 * Alan Cox <[email protected]> 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 GENMASK(31, 28) 39 #define CHV_PADCTRL0_TERM_UP BIT(23) 40 #define CHV_PADCTRL0_TERM_SHIFT 20 41 #define CHV_PADCTRL0_TERM_MASK GENMASK(22, 20) 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 GENMASK(19, 16) 47 #define CHV_PADCTRL0_GPIOEN BIT(15) 48 #define CHV_PADCTRL0_GPIOCFG_SHIFT 8 49 #define CHV_PADCTRL0_GPIOCFG_MASK GENMASK(10, 8) 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 GENMASK(7, 4) 61 #define CHV_PADCTRL1_INVRXTX_TXDATA BIT(7) 62 #define CHV_PADCTRL1_INVRXTX_RXDATA BIT(6) 63 #define CHV_PADCTRL1_INVRXTX_TXENABLE BIT(5) 64 #define CHV_PADCTRL1_ODEN BIT(3) 65 #define CHV_PADCTRL1_INTWAKECFG_MASK GENMASK(2, 0) 66 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1 67 #define CHV_PADCTRL1_INTWAKECFG_RISING 2 68 #define CHV_PADCTRL1_INTWAKECFG_BOTH 3 69 #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4 70 71 struct intel_pad_context { 72 u32 padctrl0; 73 u32 padctrl1; 74 }; 75 76 #define CHV_INVALID_HWIRQ ((unsigned int)INVALID_HWIRQ) 77 78 /** 79 * struct intel_community_context - community context for Cherryview 80 * @intr_lines: Mapping between 16 HW interrupt wires and GPIO offset (in GPIO number space) 81 * @saved_intmask: Interrupt mask saved for system sleep 82 */ 83 struct intel_community_context { 84 unsigned int intr_lines[16]; 85 u32 saved_intmask; 86 }; 87 88 #define PINMODE_INVERT_OE BIT(15) 89 90 #define PINMODE(m, i) ((m) | ((i) * PINMODE_INVERT_OE)) 91 92 #define CHV_GPP(start, end) \ 93 { \ 94 .base = (start), \ 95 .size = (end) - (start) + 1, \ 96 } 97 98 #define CHV_COMMUNITY(g, i, a) \ 99 { \ 100 .gpps = (g), \ 101 .ngpps = ARRAY_SIZE(g), \ 102 .nirqs = (i), \ 103 .acpi_space_id = (a), \ 104 } 105 106 static const struct pinctrl_pin_desc southwest_pins[] = { 107 PINCTRL_PIN(0, "FST_SPI_D2"), 108 PINCTRL_PIN(1, "FST_SPI_D0"), 109 PINCTRL_PIN(2, "FST_SPI_CLK"), 110 PINCTRL_PIN(3, "FST_SPI_D3"), 111 PINCTRL_PIN(4, "FST_SPI_CS1_B"), 112 PINCTRL_PIN(5, "FST_SPI_D1"), 113 PINCTRL_PIN(6, "FST_SPI_CS0_B"), 114 PINCTRL_PIN(7, "FST_SPI_CS2_B"), 115 116 PINCTRL_PIN(15, "UART1_RTS_B"), 117 PINCTRL_PIN(16, "UART1_RXD"), 118 PINCTRL_PIN(17, "UART2_RXD"), 119 PINCTRL_PIN(18, "UART1_CTS_B"), 120 PINCTRL_PIN(19, "UART2_RTS_B"), 121 PINCTRL_PIN(20, "UART1_TXD"), 122 PINCTRL_PIN(21, "UART2_TXD"), 123 PINCTRL_PIN(22, "UART2_CTS_B"), 124 125 PINCTRL_PIN(30, "MF_HDA_CLK"), 126 PINCTRL_PIN(31, "MF_HDA_RSTB"), 127 PINCTRL_PIN(32, "MF_HDA_SDIO"), 128 PINCTRL_PIN(33, "MF_HDA_SDO"), 129 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"), 130 PINCTRL_PIN(35, "MF_HDA_SYNC"), 131 PINCTRL_PIN(36, "MF_HDA_SDI1"), 132 PINCTRL_PIN(37, "MF_HDA_DOCKENB"), 133 134 PINCTRL_PIN(45, "I2C5_SDA"), 135 PINCTRL_PIN(46, "I2C4_SDA"), 136 PINCTRL_PIN(47, "I2C6_SDA"), 137 PINCTRL_PIN(48, "I2C5_SCL"), 138 PINCTRL_PIN(49, "I2C_NFC_SDA"), 139 PINCTRL_PIN(50, "I2C4_SCL"), 140 PINCTRL_PIN(51, "I2C6_SCL"), 141 PINCTRL_PIN(52, "I2C_NFC_SCL"), 142 143 PINCTRL_PIN(60, "I2C1_SDA"), 144 PINCTRL_PIN(61, "I2C0_SDA"), 145 PINCTRL_PIN(62, "I2C2_SDA"), 146 PINCTRL_PIN(63, "I2C1_SCL"), 147 PINCTRL_PIN(64, "I2C3_SDA"), 148 PINCTRL_PIN(65, "I2C0_SCL"), 149 PINCTRL_PIN(66, "I2C2_SCL"), 150 PINCTRL_PIN(67, "I2C3_SCL"), 151 152 PINCTRL_PIN(75, "SATA_GP0"), 153 PINCTRL_PIN(76, "SATA_GP1"), 154 PINCTRL_PIN(77, "SATA_LEDN"), 155 PINCTRL_PIN(78, "SATA_GP2"), 156 PINCTRL_PIN(79, "MF_SMB_ALERTB"), 157 PINCTRL_PIN(80, "SATA_GP3"), 158 PINCTRL_PIN(81, "MF_SMB_CLK"), 159 PINCTRL_PIN(82, "MF_SMB_DATA"), 160 161 PINCTRL_PIN(90, "PCIE_CLKREQ0B"), 162 PINCTRL_PIN(91, "PCIE_CLKREQ1B"), 163 PINCTRL_PIN(92, "GP_SSP_2_CLK"), 164 PINCTRL_PIN(93, "PCIE_CLKREQ2B"), 165 PINCTRL_PIN(94, "GP_SSP_2_RXD"), 166 PINCTRL_PIN(95, "PCIE_CLKREQ3B"), 167 PINCTRL_PIN(96, "GP_SSP_2_FS"), 168 PINCTRL_PIN(97, "GP_SSP_2_TXD"), 169 }; 170 171 static const unsigned southwest_uart0_pins[] = { 16, 20 }; 172 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 }; 173 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 }; 174 static const unsigned southwest_i2c0_pins[] = { 61, 65 }; 175 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 }; 176 static const unsigned southwest_lpe_pins[] = { 177 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97, 178 }; 179 static const unsigned southwest_i2c1_pins[] = { 60, 63 }; 180 static const unsigned southwest_i2c2_pins[] = { 62, 66 }; 181 static const unsigned southwest_i2c3_pins[] = { 64, 67 }; 182 static const unsigned southwest_i2c4_pins[] = { 46, 50 }; 183 static const unsigned southwest_i2c5_pins[] = { 45, 48 }; 184 static const unsigned southwest_i2c6_pins[] = { 47, 51 }; 185 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 }; 186 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 }; 187 188 /* Some of LPE I2S TXD pins need to have OE inversion set */ 189 static const unsigned int southwest_lpe_altfuncs[] = { 190 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 30, 31, 32, 33 */ 191 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 34, 35, 36, 37 */ 192 PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 1), /* 92, 94, 96, 97 */ 193 }; 194 195 /* 196 * Two spi3 chipselects are available in different mode than the main spi3 197 * functionality, which is using mode 2. 198 */ 199 static const unsigned int southwest_spi3_altfuncs[] = { 200 PINMODE(3, 0), PINMODE(2, 0), PINMODE(3, 0), PINMODE(2, 0), /* 76, 79, 80, 81 */ 201 PINMODE(2, 0), /* 82 */ 202 }; 203 204 static const struct intel_pingroup southwest_groups[] = { 205 PIN_GROUP("uart0_grp", southwest_uart0_pins, PINMODE(2, 0)), 206 PIN_GROUP("uart1_grp", southwest_uart1_pins, PINMODE(1, 0)), 207 PIN_GROUP("uart2_grp", southwest_uart2_pins, PINMODE(1, 0)), 208 PIN_GROUP("hda_grp", southwest_hda_pins, PINMODE(2, 0)), 209 PIN_GROUP("i2c0_grp", southwest_i2c0_pins, PINMODE(1, 1)), 210 PIN_GROUP("i2c1_grp", southwest_i2c1_pins, PINMODE(1, 1)), 211 PIN_GROUP("i2c2_grp", southwest_i2c2_pins, PINMODE(1, 1)), 212 PIN_GROUP("i2c3_grp", southwest_i2c3_pins, PINMODE(1, 1)), 213 PIN_GROUP("i2c4_grp", southwest_i2c4_pins, PINMODE(1, 1)), 214 PIN_GROUP("i2c5_grp", southwest_i2c5_pins, PINMODE(1, 1)), 215 PIN_GROUP("i2c6_grp", southwest_i2c6_pins, PINMODE(1, 1)), 216 PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, PINMODE(2, 1)), 217 PIN_GROUP("lpe_grp", southwest_lpe_pins, southwest_lpe_altfuncs), 218 PIN_GROUP("spi3_grp", southwest_spi3_pins, southwest_spi3_altfuncs), 219 }; 220 221 static const char * const southwest_uart0_groups[] = { "uart0_grp" }; 222 static const char * const southwest_uart1_groups[] = { "uart1_grp" }; 223 static const char * const southwest_uart2_groups[] = { "uart2_grp" }; 224 static const char * const southwest_hda_groups[] = { "hda_grp" }; 225 static const char * const southwest_lpe_groups[] = { "lpe_grp" }; 226 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" }; 227 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" }; 228 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" }; 229 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" }; 230 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" }; 231 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" }; 232 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" }; 233 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" }; 234 static const char * const southwest_spi3_groups[] = { "spi3_grp" }; 235 236 /* 237 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are 238 * enabled only as GPIOs. 239 */ 240 static const struct intel_function southwest_functions[] = { 241 FUNCTION("uart0", southwest_uart0_groups), 242 FUNCTION("uart1", southwest_uart1_groups), 243 FUNCTION("uart2", southwest_uart2_groups), 244 FUNCTION("hda", southwest_hda_groups), 245 FUNCTION("lpe", southwest_lpe_groups), 246 FUNCTION("i2c0", southwest_i2c0_groups), 247 FUNCTION("i2c1", southwest_i2c1_groups), 248 FUNCTION("i2c2", southwest_i2c2_groups), 249 FUNCTION("i2c3", southwest_i2c3_groups), 250 FUNCTION("i2c4", southwest_i2c4_groups), 251 FUNCTION("i2c5", southwest_i2c5_groups), 252 FUNCTION("i2c6", southwest_i2c6_groups), 253 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups), 254 FUNCTION("spi3", southwest_spi3_groups), 255 }; 256 257 static const struct intel_padgroup southwest_gpps[] = { 258 CHV_GPP(0, 7), 259 CHV_GPP(15, 22), 260 CHV_GPP(30, 37), 261 CHV_GPP(45, 52), 262 CHV_GPP(60, 67), 263 CHV_GPP(75, 82), 264 CHV_GPP(90, 97), 265 }; 266 267 /* 268 * Southwest community can generate GPIO interrupts only for the first 8 269 * interrupts. The upper half (8-15) can only be used to trigger GPEs. 270 */ 271 static const struct intel_community southwest_communities[] = { 272 CHV_COMMUNITY(southwest_gpps, 8, 0x91), 273 }; 274 275 static const struct intel_pinctrl_soc_data southwest_soc_data = { 276 .uid = "1", 277 .pins = southwest_pins, 278 .npins = ARRAY_SIZE(southwest_pins), 279 .groups = southwest_groups, 280 .ngroups = ARRAY_SIZE(southwest_groups), 281 .functions = southwest_functions, 282 .nfunctions = ARRAY_SIZE(southwest_functions), 283 .communities = southwest_communities, 284 .ncommunities = ARRAY_SIZE(southwest_communities), 285 }; 286 287 static const struct pinctrl_pin_desc north_pins[] = { 288 PINCTRL_PIN(0, "GPIO_DFX_0"), 289 PINCTRL_PIN(1, "GPIO_DFX_3"), 290 PINCTRL_PIN(2, "GPIO_DFX_7"), 291 PINCTRL_PIN(3, "GPIO_DFX_1"), 292 PINCTRL_PIN(4, "GPIO_DFX_5"), 293 PINCTRL_PIN(5, "GPIO_DFX_4"), 294 PINCTRL_PIN(6, "GPIO_DFX_8"), 295 PINCTRL_PIN(7, "GPIO_DFX_2"), 296 PINCTRL_PIN(8, "GPIO_DFX_6"), 297 298 PINCTRL_PIN(15, "GPIO_SUS0"), 299 PINCTRL_PIN(16, "SEC_GPIO_SUS10"), 300 PINCTRL_PIN(17, "GPIO_SUS3"), 301 PINCTRL_PIN(18, "GPIO_SUS7"), 302 PINCTRL_PIN(19, "GPIO_SUS1"), 303 PINCTRL_PIN(20, "GPIO_SUS5"), 304 PINCTRL_PIN(21, "SEC_GPIO_SUS11"), 305 PINCTRL_PIN(22, "GPIO_SUS4"), 306 PINCTRL_PIN(23, "SEC_GPIO_SUS8"), 307 PINCTRL_PIN(24, "GPIO_SUS2"), 308 PINCTRL_PIN(25, "GPIO_SUS6"), 309 PINCTRL_PIN(26, "CX_PREQ_B"), 310 PINCTRL_PIN(27, "SEC_GPIO_SUS9"), 311 312 PINCTRL_PIN(30, "TRST_B"), 313 PINCTRL_PIN(31, "TCK"), 314 PINCTRL_PIN(32, "PROCHOT_B"), 315 PINCTRL_PIN(33, "SVIDO_DATA"), 316 PINCTRL_PIN(34, "TMS"), 317 PINCTRL_PIN(35, "CX_PRDY_B_2"), 318 PINCTRL_PIN(36, "TDO_2"), 319 PINCTRL_PIN(37, "CX_PRDY_B"), 320 PINCTRL_PIN(38, "SVIDO_ALERT_B"), 321 PINCTRL_PIN(39, "TDO"), 322 PINCTRL_PIN(40, "SVIDO_CLK"), 323 PINCTRL_PIN(41, "TDI"), 324 325 PINCTRL_PIN(45, "GP_CAMERASB_05"), 326 PINCTRL_PIN(46, "GP_CAMERASB_02"), 327 PINCTRL_PIN(47, "GP_CAMERASB_08"), 328 PINCTRL_PIN(48, "GP_CAMERASB_00"), 329 PINCTRL_PIN(49, "GP_CAMERASB_06"), 330 PINCTRL_PIN(50, "GP_CAMERASB_10"), 331 PINCTRL_PIN(51, "GP_CAMERASB_03"), 332 PINCTRL_PIN(52, "GP_CAMERASB_09"), 333 PINCTRL_PIN(53, "GP_CAMERASB_01"), 334 PINCTRL_PIN(54, "GP_CAMERASB_07"), 335 PINCTRL_PIN(55, "GP_CAMERASB_11"), 336 PINCTRL_PIN(56, "GP_CAMERASB_04"), 337 338 PINCTRL_PIN(60, "PANEL0_BKLTEN"), 339 PINCTRL_PIN(61, "HV_DDI0_HPD"), 340 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"), 341 PINCTRL_PIN(63, "PANEL1_BKLTCTL"), 342 PINCTRL_PIN(64, "HV_DDI1_HPD"), 343 PINCTRL_PIN(65, "PANEL0_BKLTCTL"), 344 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"), 345 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"), 346 PINCTRL_PIN(68, "HV_DDI2_HPD"), 347 PINCTRL_PIN(69, "PANEL1_VDDEN"), 348 PINCTRL_PIN(70, "PANEL1_BKLTEN"), 349 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"), 350 PINCTRL_PIN(72, "PANEL0_VDDEN"), 351 }; 352 353 static const struct intel_padgroup north_gpps[] = { 354 CHV_GPP(0, 8), 355 CHV_GPP(15, 27), 356 CHV_GPP(30, 41), 357 CHV_GPP(45, 56), 358 CHV_GPP(60, 72), 359 }; 360 361 /* 362 * North community can generate GPIO interrupts only for the first 8 363 * interrupts. The upper half (8-15) can only be used to trigger GPEs. 364 */ 365 static const struct intel_community north_communities[] = { 366 CHV_COMMUNITY(north_gpps, 8, 0x92), 367 }; 368 369 static const struct intel_pinctrl_soc_data north_soc_data = { 370 .uid = "2", 371 .pins = north_pins, 372 .npins = ARRAY_SIZE(north_pins), 373 .communities = north_communities, 374 .ncommunities = ARRAY_SIZE(north_communities), 375 }; 376 377 static const struct pinctrl_pin_desc east_pins[] = { 378 PINCTRL_PIN(0, "PMU_SLP_S3_B"), 379 PINCTRL_PIN(1, "PMU_BATLOW_B"), 380 PINCTRL_PIN(2, "SUS_STAT_B"), 381 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"), 382 PINCTRL_PIN(4, "PMU_AC_PRESENT"), 383 PINCTRL_PIN(5, "PMU_PLTRST_B"), 384 PINCTRL_PIN(6, "PMU_SUSCLK"), 385 PINCTRL_PIN(7, "PMU_SLP_LAN_B"), 386 PINCTRL_PIN(8, "PMU_PWRBTN_B"), 387 PINCTRL_PIN(9, "PMU_SLP_S4_B"), 388 PINCTRL_PIN(10, "PMU_WAKE_B"), 389 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"), 390 391 PINCTRL_PIN(15, "MF_ISH_GPIO_3"), 392 PINCTRL_PIN(16, "MF_ISH_GPIO_7"), 393 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"), 394 PINCTRL_PIN(18, "MF_ISH_GPIO_1"), 395 PINCTRL_PIN(19, "MF_ISH_GPIO_5"), 396 PINCTRL_PIN(20, "MF_ISH_GPIO_9"), 397 PINCTRL_PIN(21, "MF_ISH_GPIO_0"), 398 PINCTRL_PIN(22, "MF_ISH_GPIO_4"), 399 PINCTRL_PIN(23, "MF_ISH_GPIO_8"), 400 PINCTRL_PIN(24, "MF_ISH_GPIO_2"), 401 PINCTRL_PIN(25, "MF_ISH_GPIO_6"), 402 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"), 403 }; 404 405 static const struct intel_padgroup east_gpps[] = { 406 CHV_GPP(0, 11), 407 CHV_GPP(15, 26), 408 }; 409 410 static const struct intel_community east_communities[] = { 411 CHV_COMMUNITY(east_gpps, 16, 0x93), 412 }; 413 414 static const struct intel_pinctrl_soc_data east_soc_data = { 415 .uid = "3", 416 .pins = east_pins, 417 .npins = ARRAY_SIZE(east_pins), 418 .communities = east_communities, 419 .ncommunities = ARRAY_SIZE(east_communities), 420 }; 421 422 static const struct pinctrl_pin_desc southeast_pins[] = { 423 PINCTRL_PIN(0, "MF_PLT_CLK0"), 424 PINCTRL_PIN(1, "PWM1"), 425 PINCTRL_PIN(2, "MF_PLT_CLK1"), 426 PINCTRL_PIN(3, "MF_PLT_CLK4"), 427 PINCTRL_PIN(4, "MF_PLT_CLK3"), 428 PINCTRL_PIN(5, "PWM0"), 429 PINCTRL_PIN(6, "MF_PLT_CLK5"), 430 PINCTRL_PIN(7, "MF_PLT_CLK2"), 431 432 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"), 433 PINCTRL_PIN(16, "SDMMC1_CLK"), 434 PINCTRL_PIN(17, "SDMMC1_D0"), 435 PINCTRL_PIN(18, "SDMMC2_D1"), 436 PINCTRL_PIN(19, "SDMMC2_CLK"), 437 PINCTRL_PIN(20, "SDMMC1_D2"), 438 PINCTRL_PIN(21, "SDMMC2_D2"), 439 PINCTRL_PIN(22, "SDMMC2_CMD"), 440 PINCTRL_PIN(23, "SDMMC1_CMD"), 441 PINCTRL_PIN(24, "SDMMC1_D1"), 442 PINCTRL_PIN(25, "SDMMC2_D0"), 443 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"), 444 445 PINCTRL_PIN(30, "SDMMC3_D1"), 446 PINCTRL_PIN(31, "SDMMC3_CLK"), 447 PINCTRL_PIN(32, "SDMMC3_D3"), 448 PINCTRL_PIN(33, "SDMMC3_D2"), 449 PINCTRL_PIN(34, "SDMMC3_CMD"), 450 PINCTRL_PIN(35, "SDMMC3_D0"), 451 452 PINCTRL_PIN(45, "MF_LPC_AD2"), 453 PINCTRL_PIN(46, "LPC_CLKRUNB"), 454 PINCTRL_PIN(47, "MF_LPC_AD0"), 455 PINCTRL_PIN(48, "LPC_FRAMEB"), 456 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"), 457 PINCTRL_PIN(50, "MF_LPC_AD3"), 458 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"), 459 PINCTRL_PIN(52, "MF_LPC_AD1"), 460 461 PINCTRL_PIN(60, "SPI1_MISO"), 462 PINCTRL_PIN(61, "SPI1_CSO_B"), 463 PINCTRL_PIN(62, "SPI1_CLK"), 464 PINCTRL_PIN(63, "MMC1_D6"), 465 PINCTRL_PIN(64, "SPI1_MOSI"), 466 PINCTRL_PIN(65, "MMC1_D5"), 467 PINCTRL_PIN(66, "SPI1_CS1_B"), 468 PINCTRL_PIN(67, "MMC1_D4_SD_WE"), 469 PINCTRL_PIN(68, "MMC1_D7"), 470 PINCTRL_PIN(69, "MMC1_RCLK"), 471 472 PINCTRL_PIN(75, "USB_OC1_B"), 473 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"), 474 PINCTRL_PIN(77, "GPIO_ALERT"), 475 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"), 476 PINCTRL_PIN(79, "ILB_SERIRQ"), 477 PINCTRL_PIN(80, "USB_OC0_B"), 478 PINCTRL_PIN(81, "SDMMC3_CD_B"), 479 PINCTRL_PIN(82, "SPKR"), 480 PINCTRL_PIN(83, "SUSPWRDNACK"), 481 PINCTRL_PIN(84, "SPARE_PIN"), 482 PINCTRL_PIN(85, "SDMMC3_1P8_EN"), 483 }; 484 485 static const unsigned southeast_pwm0_pins[] = { 5 }; 486 static const unsigned southeast_pwm1_pins[] = { 1 }; 487 static const unsigned southeast_sdmmc1_pins[] = { 488 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69, 489 }; 490 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 }; 491 static const unsigned southeast_sdmmc3_pins[] = { 492 30, 31, 32, 33, 34, 35, 78, 81, 85, 493 }; 494 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 }; 495 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 }; 496 497 static const struct intel_pingroup southeast_groups[] = { 498 PIN_GROUP("pwm0_grp", southeast_pwm0_pins, PINMODE(1, 0)), 499 PIN_GROUP("pwm1_grp", southeast_pwm1_pins, PINMODE(1, 0)), 500 PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, PINMODE(1, 0)), 501 PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, PINMODE(1, 0)), 502 PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, PINMODE(1, 0)), 503 PIN_GROUP("spi1_grp", southeast_spi1_pins, PINMODE(1, 0)), 504 PIN_GROUP("spi2_grp", southeast_spi2_pins, PINMODE(4, 0)), 505 }; 506 507 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" }; 508 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" }; 509 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" }; 510 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" }; 511 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" }; 512 static const char * const southeast_spi1_groups[] = { "spi1_grp" }; 513 static const char * const southeast_spi2_groups[] = { "spi2_grp" }; 514 515 static const struct intel_function southeast_functions[] = { 516 FUNCTION("pwm0", southeast_pwm0_groups), 517 FUNCTION("pwm1", southeast_pwm1_groups), 518 FUNCTION("sdmmc1", southeast_sdmmc1_groups), 519 FUNCTION("sdmmc2", southeast_sdmmc2_groups), 520 FUNCTION("sdmmc3", southeast_sdmmc3_groups), 521 FUNCTION("spi1", southeast_spi1_groups), 522 FUNCTION("spi2", southeast_spi2_groups), 523 }; 524 525 static const struct intel_padgroup southeast_gpps[] = { 526 CHV_GPP(0, 7), 527 CHV_GPP(15, 26), 528 CHV_GPP(30, 35), 529 CHV_GPP(45, 52), 530 CHV_GPP(60, 69), 531 CHV_GPP(75, 85), 532 }; 533 534 static const struct intel_community southeast_communities[] = { 535 CHV_COMMUNITY(southeast_gpps, 16, 0x94), 536 }; 537 538 static const struct intel_pinctrl_soc_data southeast_soc_data = { 539 .uid = "4", 540 .pins = southeast_pins, 541 .npins = ARRAY_SIZE(southeast_pins), 542 .groups = southeast_groups, 543 .ngroups = ARRAY_SIZE(southeast_groups), 544 .functions = southeast_functions, 545 .nfunctions = ARRAY_SIZE(southeast_functions), 546 .communities = southeast_communities, 547 .ncommunities = ARRAY_SIZE(southeast_communities), 548 }; 549 550 static const struct intel_pinctrl_soc_data *chv_soc_data[] = { 551 &southwest_soc_data, 552 &north_soc_data, 553 &east_soc_data, 554 &southeast_soc_data, 555 NULL 556 }; 557 558 /* 559 * Lock to serialize register accesses 560 * 561 * Due to a silicon issue, a shared lock must be used to prevent 562 * concurrent accesses across the 4 GPIO controllers. 563 * 564 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005), 565 * errata #CHT34, for further information. 566 */ 567 static DEFINE_RAW_SPINLOCK(chv_lock); 568 569 static u32 chv_pctrl_readl(struct intel_pinctrl *pctrl, unsigned int offset) 570 { 571 const struct intel_community *community = &pctrl->communities[0]; 572 573 return readl(community->regs + offset); 574 } 575 576 static void chv_pctrl_writel(struct intel_pinctrl *pctrl, unsigned int offset, u32 value) 577 { 578 const struct intel_community *community = &pctrl->communities[0]; 579 void __iomem *reg = community->regs + offset; 580 581 /* Write and simple read back to confirm the bus transferring done */ 582 writel(value, reg); 583 readl(reg); 584 } 585 586 static void __iomem *chv_padreg(struct intel_pinctrl *pctrl, unsigned int offset, 587 unsigned int reg) 588 { 589 const struct intel_community *community = &pctrl->communities[0]; 590 unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO; 591 unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO; 592 593 offset = FAMILY_PAD_REGS_SIZE * family_no + GPIO_REGS_SIZE * pad_no; 594 595 return community->pad_regs + offset + reg; 596 } 597 598 static u32 chv_readl(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset) 599 { 600 return readl(chv_padreg(pctrl, pin, offset)); 601 } 602 603 static void chv_writel(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset, u32 value) 604 { 605 void __iomem *reg = chv_padreg(pctrl, pin, offset); 606 607 /* Write and simple read back to confirm the bus transferring done */ 608 writel(value, reg); 609 readl(reg); 610 } 611 612 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */ 613 static bool chv_pad_locked(struct intel_pinctrl *pctrl, unsigned int offset) 614 { 615 return chv_readl(pctrl, offset, CHV_PADCTRL1) & CHV_PADCTRL1_CFGLOCK; 616 } 617 618 static int chv_get_groups_count(struct pinctrl_dev *pctldev) 619 { 620 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 621 622 return pctrl->soc->ngroups; 623 } 624 625 static const char *chv_get_group_name(struct pinctrl_dev *pctldev, 626 unsigned int group) 627 { 628 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 629 630 return pctrl->soc->groups[group].name; 631 } 632 633 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, 634 const unsigned int **pins, unsigned int *npins) 635 { 636 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 637 638 *pins = pctrl->soc->groups[group].pins; 639 *npins = pctrl->soc->groups[group].npins; 640 return 0; 641 } 642 643 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 644 unsigned int offset) 645 { 646 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 647 unsigned long flags; 648 u32 ctrl0, ctrl1; 649 bool locked; 650 651 raw_spin_lock_irqsave(&chv_lock, flags); 652 653 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 654 ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1); 655 locked = chv_pad_locked(pctrl, offset); 656 657 raw_spin_unlock_irqrestore(&chv_lock, flags); 658 659 if (ctrl0 & CHV_PADCTRL0_GPIOEN) { 660 seq_puts(s, "GPIO "); 661 } else { 662 u32 mode; 663 664 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK; 665 mode >>= CHV_PADCTRL0_PMODE_SHIFT; 666 667 seq_printf(s, "mode %d ", mode); 668 } 669 670 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1); 671 672 if (locked) 673 seq_puts(s, " [LOCKED]"); 674 } 675 676 static const struct pinctrl_ops chv_pinctrl_ops = { 677 .get_groups_count = chv_get_groups_count, 678 .get_group_name = chv_get_group_name, 679 .get_group_pins = chv_get_group_pins, 680 .pin_dbg_show = chv_pin_dbg_show, 681 }; 682 683 static int chv_get_functions_count(struct pinctrl_dev *pctldev) 684 { 685 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 686 687 return pctrl->soc->nfunctions; 688 } 689 690 static const char *chv_get_function_name(struct pinctrl_dev *pctldev, 691 unsigned int function) 692 { 693 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 694 695 return pctrl->soc->functions[function].name; 696 } 697 698 static int chv_get_function_groups(struct pinctrl_dev *pctldev, 699 unsigned int function, 700 const char * const **groups, 701 unsigned int * const ngroups) 702 { 703 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 704 705 *groups = pctrl->soc->functions[function].groups; 706 *ngroups = pctrl->soc->functions[function].ngroups; 707 return 0; 708 } 709 710 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, 711 unsigned int function, unsigned int group) 712 { 713 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 714 const struct intel_pingroup *grp; 715 unsigned long flags; 716 int i; 717 718 grp = &pctrl->soc->groups[group]; 719 720 raw_spin_lock_irqsave(&chv_lock, flags); 721 722 /* Check first that the pad is not locked */ 723 for (i = 0; i < grp->npins; i++) { 724 if (chv_pad_locked(pctrl, grp->pins[i])) { 725 dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n", 726 grp->pins[i]); 727 raw_spin_unlock_irqrestore(&chv_lock, flags); 728 return -EBUSY; 729 } 730 } 731 732 for (i = 0; i < grp->npins; i++) { 733 int pin = grp->pins[i]; 734 unsigned int mode; 735 bool invert_oe; 736 u32 value; 737 738 /* Check if there is pin-specific config */ 739 if (grp->modes) 740 mode = grp->modes[i]; 741 else 742 mode = grp->mode; 743 744 /* Extract OE inversion */ 745 invert_oe = mode & PINMODE_INVERT_OE; 746 mode &= ~PINMODE_INVERT_OE; 747 748 value = chv_readl(pctrl, pin, CHV_PADCTRL0); 749 /* Disable GPIO mode */ 750 value &= ~CHV_PADCTRL0_GPIOEN; 751 /* Set to desired mode */ 752 value &= ~CHV_PADCTRL0_PMODE_MASK; 753 value |= mode << CHV_PADCTRL0_PMODE_SHIFT; 754 chv_writel(pctrl, pin, CHV_PADCTRL0, value); 755 756 /* Update for invert_oe */ 757 value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK; 758 if (invert_oe) 759 value |= CHV_PADCTRL1_INVRXTX_TXENABLE; 760 chv_writel(pctrl, pin, CHV_PADCTRL1, value); 761 762 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n", 763 pin, mode, invert_oe ? "" : "not "); 764 } 765 766 raw_spin_unlock_irqrestore(&chv_lock, flags); 767 768 return 0; 769 } 770 771 static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl, 772 unsigned int offset) 773 { 774 u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK; 775 u32 value; 776 777 /* 778 * One some devices the GPIO should output the inverted value from what 779 * device-drivers / ACPI code expects (inverted external buffer?). The 780 * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag, 781 * preserve this flag if the pin is already setup as GPIO. 782 */ 783 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 784 if (value & CHV_PADCTRL0_GPIOEN) 785 invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA; 786 787 value = chv_readl(pctrl, offset, CHV_PADCTRL1); 788 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 789 value &= ~invrxtx_mask; 790 chv_writel(pctrl, offset, CHV_PADCTRL1, value); 791 } 792 793 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev, 794 struct pinctrl_gpio_range *range, 795 unsigned int offset) 796 { 797 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 798 unsigned long flags; 799 u32 value; 800 801 raw_spin_lock_irqsave(&chv_lock, flags); 802 803 if (chv_pad_locked(pctrl, offset)) { 804 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 805 if (!(value & CHV_PADCTRL0_GPIOEN)) { 806 /* Locked so cannot enable */ 807 raw_spin_unlock_irqrestore(&chv_lock, flags); 808 return -EBUSY; 809 } 810 } else { 811 struct intel_community_context *cctx = &pctrl->context.communities[0]; 812 int i; 813 814 /* Reset the interrupt mapping */ 815 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) { 816 if (cctx->intr_lines[i] == offset) { 817 cctx->intr_lines[i] = CHV_INVALID_HWIRQ; 818 break; 819 } 820 } 821 822 /* Disable interrupt generation */ 823 chv_gpio_clear_triggering(pctrl, offset); 824 825 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 826 827 /* 828 * If the pin is in HiZ mode (both TX and RX buffers are 829 * disabled) we turn it to be input now. 830 */ 831 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) == 832 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) { 833 value &= ~CHV_PADCTRL0_GPIOCFG_MASK; 834 value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; 835 } 836 837 /* Switch to a GPIO mode */ 838 value |= CHV_PADCTRL0_GPIOEN; 839 chv_writel(pctrl, offset, CHV_PADCTRL0, value); 840 } 841 842 raw_spin_unlock_irqrestore(&chv_lock, flags); 843 844 return 0; 845 } 846 847 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev, 848 struct pinctrl_gpio_range *range, 849 unsigned int offset) 850 { 851 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 852 unsigned long flags; 853 854 raw_spin_lock_irqsave(&chv_lock, flags); 855 856 if (!chv_pad_locked(pctrl, offset)) 857 chv_gpio_clear_triggering(pctrl, offset); 858 859 raw_spin_unlock_irqrestore(&chv_lock, flags); 860 } 861 862 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev, 863 struct pinctrl_gpio_range *range, 864 unsigned int offset, bool input) 865 { 866 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 867 unsigned long flags; 868 u32 ctrl0; 869 870 raw_spin_lock_irqsave(&chv_lock, flags); 871 872 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK; 873 if (input) 874 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; 875 else 876 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT; 877 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); 878 879 raw_spin_unlock_irqrestore(&chv_lock, flags); 880 881 return 0; 882 } 883 884 static const struct pinmux_ops chv_pinmux_ops = { 885 .get_functions_count = chv_get_functions_count, 886 .get_function_name = chv_get_function_name, 887 .get_function_groups = chv_get_function_groups, 888 .set_mux = chv_pinmux_set_mux, 889 .gpio_request_enable = chv_gpio_request_enable, 890 .gpio_disable_free = chv_gpio_disable_free, 891 .gpio_set_direction = chv_gpio_set_direction, 892 }; 893 894 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 895 unsigned long *config) 896 { 897 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 898 enum pin_config_param param = pinconf_to_config_param(*config); 899 unsigned long flags; 900 u32 ctrl0, ctrl1; 901 u16 arg = 0; 902 u32 term; 903 904 raw_spin_lock_irqsave(&chv_lock, flags); 905 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); 906 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); 907 raw_spin_unlock_irqrestore(&chv_lock, flags); 908 909 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT; 910 911 switch (param) { 912 case PIN_CONFIG_BIAS_DISABLE: 913 if (term) 914 return -EINVAL; 915 break; 916 917 case PIN_CONFIG_BIAS_PULL_UP: 918 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP)) 919 return -EINVAL; 920 921 switch (term) { 922 case CHV_PADCTRL0_TERM_20K: 923 arg = 20000; 924 break; 925 case CHV_PADCTRL0_TERM_5K: 926 arg = 5000; 927 break; 928 case CHV_PADCTRL0_TERM_1K: 929 arg = 1000; 930 break; 931 } 932 933 break; 934 935 case PIN_CONFIG_BIAS_PULL_DOWN: 936 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP)) 937 return -EINVAL; 938 939 switch (term) { 940 case CHV_PADCTRL0_TERM_20K: 941 arg = 20000; 942 break; 943 case CHV_PADCTRL0_TERM_5K: 944 arg = 5000; 945 break; 946 } 947 948 break; 949 950 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 951 if (!(ctrl1 & CHV_PADCTRL1_ODEN)) 952 return -EINVAL; 953 break; 954 955 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: { 956 u32 cfg; 957 958 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 959 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 960 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ) 961 return -EINVAL; 962 963 break; 964 } 965 966 default: 967 return -ENOTSUPP; 968 } 969 970 *config = pinconf_to_config_packed(param, arg); 971 return 0; 972 } 973 974 static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin, 975 enum pin_config_param param, u32 arg) 976 { 977 unsigned long flags; 978 u32 ctrl0, pull; 979 980 raw_spin_lock_irqsave(&chv_lock, flags); 981 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); 982 983 switch (param) { 984 case PIN_CONFIG_BIAS_DISABLE: 985 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 986 break; 987 988 case PIN_CONFIG_BIAS_PULL_UP: 989 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 990 991 switch (arg) { 992 case 1000: 993 /* For 1k there is only pull up */ 994 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT; 995 break; 996 case 5000: 997 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 998 break; 999 case 20000: 1000 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 1001 break; 1002 default: 1003 raw_spin_unlock_irqrestore(&chv_lock, flags); 1004 return -EINVAL; 1005 } 1006 1007 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull; 1008 break; 1009 1010 case PIN_CONFIG_BIAS_PULL_DOWN: 1011 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 1012 1013 switch (arg) { 1014 case 5000: 1015 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 1016 break; 1017 case 20000: 1018 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 1019 break; 1020 default: 1021 raw_spin_unlock_irqrestore(&chv_lock, flags); 1022 return -EINVAL; 1023 } 1024 1025 ctrl0 |= pull; 1026 break; 1027 1028 default: 1029 raw_spin_unlock_irqrestore(&chv_lock, flags); 1030 return -EINVAL; 1031 } 1032 1033 chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0); 1034 raw_spin_unlock_irqrestore(&chv_lock, flags); 1035 1036 return 0; 1037 } 1038 1039 static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin, 1040 bool enable) 1041 { 1042 unsigned long flags; 1043 u32 ctrl1; 1044 1045 raw_spin_lock_irqsave(&chv_lock, flags); 1046 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); 1047 1048 if (enable) 1049 ctrl1 |= CHV_PADCTRL1_ODEN; 1050 else 1051 ctrl1 &= ~CHV_PADCTRL1_ODEN; 1052 1053 chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1); 1054 raw_spin_unlock_irqrestore(&chv_lock, flags); 1055 1056 return 0; 1057 } 1058 1059 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin, 1060 unsigned long *configs, unsigned int nconfigs) 1061 { 1062 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 1063 enum pin_config_param param; 1064 int i, ret; 1065 u32 arg; 1066 1067 if (chv_pad_locked(pctrl, pin)) 1068 return -EBUSY; 1069 1070 for (i = 0; i < nconfigs; i++) { 1071 param = pinconf_to_config_param(configs[i]); 1072 arg = pinconf_to_config_argument(configs[i]); 1073 1074 switch (param) { 1075 case PIN_CONFIG_BIAS_DISABLE: 1076 case PIN_CONFIG_BIAS_PULL_UP: 1077 case PIN_CONFIG_BIAS_PULL_DOWN: 1078 ret = chv_config_set_pull(pctrl, pin, param, arg); 1079 if (ret) 1080 return ret; 1081 break; 1082 1083 case PIN_CONFIG_DRIVE_PUSH_PULL: 1084 ret = chv_config_set_oden(pctrl, pin, false); 1085 if (ret) 1086 return ret; 1087 break; 1088 1089 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 1090 ret = chv_config_set_oden(pctrl, pin, true); 1091 if (ret) 1092 return ret; 1093 break; 1094 1095 default: 1096 return -ENOTSUPP; 1097 } 1098 1099 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin, 1100 param, arg); 1101 } 1102 1103 return 0; 1104 } 1105 1106 static int chv_config_group_get(struct pinctrl_dev *pctldev, 1107 unsigned int group, 1108 unsigned long *config) 1109 { 1110 const unsigned int *pins; 1111 unsigned int npins; 1112 int ret; 1113 1114 ret = chv_get_group_pins(pctldev, group, &pins, &npins); 1115 if (ret) 1116 return ret; 1117 1118 ret = chv_config_get(pctldev, pins[0], config); 1119 if (ret) 1120 return ret; 1121 1122 return 0; 1123 } 1124 1125 static int chv_config_group_set(struct pinctrl_dev *pctldev, 1126 unsigned int group, unsigned long *configs, 1127 unsigned int num_configs) 1128 { 1129 const unsigned int *pins; 1130 unsigned int npins; 1131 int i, ret; 1132 1133 ret = chv_get_group_pins(pctldev, group, &pins, &npins); 1134 if (ret) 1135 return ret; 1136 1137 for (i = 0; i < npins; i++) { 1138 ret = chv_config_set(pctldev, pins[i], configs, num_configs); 1139 if (ret) 1140 return ret; 1141 } 1142 1143 return 0; 1144 } 1145 1146 static const struct pinconf_ops chv_pinconf_ops = { 1147 .is_generic = true, 1148 .pin_config_set = chv_config_set, 1149 .pin_config_get = chv_config_get, 1150 .pin_config_group_get = chv_config_group_get, 1151 .pin_config_group_set = chv_config_group_set, 1152 }; 1153 1154 static struct pinctrl_desc chv_pinctrl_desc = { 1155 .pctlops = &chv_pinctrl_ops, 1156 .pmxops = &chv_pinmux_ops, 1157 .confops = &chv_pinconf_ops, 1158 .owner = THIS_MODULE, 1159 }; 1160 1161 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset) 1162 { 1163 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1164 unsigned long flags; 1165 u32 ctrl0, cfg; 1166 1167 raw_spin_lock_irqsave(&chv_lock, flags); 1168 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1169 raw_spin_unlock_irqrestore(&chv_lock, flags); 1170 1171 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1172 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1173 1174 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO) 1175 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE); 1176 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE); 1177 } 1178 1179 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) 1180 { 1181 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1182 unsigned long flags; 1183 u32 ctrl0; 1184 1185 raw_spin_lock_irqsave(&chv_lock, flags); 1186 1187 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1188 1189 if (value) 1190 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE; 1191 else 1192 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE; 1193 1194 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); 1195 1196 raw_spin_unlock_irqrestore(&chv_lock, flags); 1197 } 1198 1199 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 1200 { 1201 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1202 u32 ctrl0, direction; 1203 unsigned long flags; 1204 1205 raw_spin_lock_irqsave(&chv_lock, flags); 1206 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1207 raw_spin_unlock_irqrestore(&chv_lock, flags); 1208 1209 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1210 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1211 1212 if (direction == CHV_PADCTRL0_GPIOCFG_GPO) 1213 return GPIO_LINE_DIRECTION_OUT; 1214 1215 return GPIO_LINE_DIRECTION_IN; 1216 } 1217 1218 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) 1219 { 1220 return pinctrl_gpio_direction_input(chip->base + offset); 1221 } 1222 1223 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, 1224 int value) 1225 { 1226 chv_gpio_set(chip, offset, value); 1227 return pinctrl_gpio_direction_output(chip->base + offset); 1228 } 1229 1230 static const struct gpio_chip chv_gpio_chip = { 1231 .owner = THIS_MODULE, 1232 .request = gpiochip_generic_request, 1233 .free = gpiochip_generic_free, 1234 .get_direction = chv_gpio_get_direction, 1235 .direction_input = chv_gpio_direction_input, 1236 .direction_output = chv_gpio_direction_output, 1237 .get = chv_gpio_get, 1238 .set = chv_gpio_set, 1239 }; 1240 1241 static void chv_gpio_irq_ack(struct irq_data *d) 1242 { 1243 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1244 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1245 int pin = irqd_to_hwirq(d); 1246 u32 intr_line; 1247 1248 raw_spin_lock(&chv_lock); 1249 1250 intr_line = chv_readl(pctrl, pin, CHV_PADCTRL0); 1251 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1252 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1253 chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line)); 1254 1255 raw_spin_unlock(&chv_lock); 1256 } 1257 1258 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask) 1259 { 1260 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1261 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1262 int pin = irqd_to_hwirq(d); 1263 u32 value, intr_line; 1264 unsigned long flags; 1265 1266 raw_spin_lock_irqsave(&chv_lock, flags); 1267 1268 intr_line = chv_readl(pctrl, pin, CHV_PADCTRL0); 1269 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1270 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1271 1272 value = chv_pctrl_readl(pctrl, CHV_INTMASK); 1273 if (mask) 1274 value &= ~BIT(intr_line); 1275 else 1276 value |= BIT(intr_line); 1277 chv_pctrl_writel(pctrl, CHV_INTMASK, value); 1278 1279 raw_spin_unlock_irqrestore(&chv_lock, flags); 1280 } 1281 1282 static void chv_gpio_irq_mask(struct irq_data *d) 1283 { 1284 chv_gpio_irq_mask_unmask(d, true); 1285 } 1286 1287 static void chv_gpio_irq_unmask(struct irq_data *d) 1288 { 1289 chv_gpio_irq_mask_unmask(d, false); 1290 } 1291 1292 static unsigned chv_gpio_irq_startup(struct irq_data *d) 1293 { 1294 /* 1295 * Check if the interrupt has been requested with 0 as triggering 1296 * type. In that case it is assumed that the current values 1297 * programmed to the hardware are used (e.g BIOS configured 1298 * defaults). 1299 * 1300 * In that case ->irq_set_type() will never be called so we need to 1301 * read back the values from hardware now, set correct flow handler 1302 * and update mappings before the interrupt is being used. 1303 */ 1304 if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) { 1305 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1306 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1307 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1308 unsigned int pin = irqd_to_hwirq(d); 1309 irq_flow_handler_t handler; 1310 unsigned long flags; 1311 u32 intsel, value; 1312 1313 raw_spin_lock_irqsave(&chv_lock, flags); 1314 intsel = chv_readl(pctrl, pin, CHV_PADCTRL0); 1315 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1316 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1317 1318 value = chv_readl(pctrl, pin, CHV_PADCTRL1); 1319 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL) 1320 handler = handle_level_irq; 1321 else 1322 handler = handle_edge_irq; 1323 1324 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { 1325 irq_set_handler_locked(d, handler); 1326 dev_dbg(pctrl->dev, "using interrupt line %u for IRQ_TYPE_NONE on pin %u\n", 1327 intsel, pin); 1328 cctx->intr_lines[intsel] = pin; 1329 } 1330 raw_spin_unlock_irqrestore(&chv_lock, flags); 1331 } 1332 1333 chv_gpio_irq_unmask(d); 1334 return 0; 1335 } 1336 1337 static int chv_gpio_set_intr_line(struct intel_pinctrl *pctrl, unsigned int pin) 1338 { 1339 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1340 const struct intel_community *community = &pctrl->communities[0]; 1341 u32 value, intsel; 1342 int i; 1343 1344 value = chv_readl(pctrl, pin, CHV_PADCTRL0); 1345 intsel = (value & CHV_PADCTRL0_INTSEL_MASK) >> CHV_PADCTRL0_INTSEL_SHIFT; 1346 1347 if (cctx->intr_lines[intsel] == pin) 1348 return 0; 1349 1350 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { 1351 dev_dbg(pctrl->dev, "using interrupt line %u for pin %u\n", intsel, pin); 1352 cctx->intr_lines[intsel] = pin; 1353 return 0; 1354 } 1355 1356 /* 1357 * The interrupt line selected by the BIOS is already in use by 1358 * another pin, this is a known BIOS bug found on several models. 1359 * But this may also be caused by Linux deciding to use a pin as 1360 * IRQ which was not expected to be used as such by the BIOS authors, 1361 * so log this at info level only. 1362 */ 1363 dev_info(pctrl->dev, "interrupt line %u is used by both pin %u and pin %u\n", 1364 intsel, cctx->intr_lines[intsel], pin); 1365 1366 if (chv_pad_locked(pctrl, pin)) 1367 return -EBUSY; 1368 1369 /* 1370 * The BIOS fills the interrupt lines from 0 counting up, start at 1371 * the other end to find a free interrupt line to workaround this. 1372 */ 1373 for (i = community->nirqs - 1; i >= 0; i--) { 1374 if (cctx->intr_lines[i] == CHV_INVALID_HWIRQ) 1375 break; 1376 } 1377 if (i < 0) 1378 return -EBUSY; 1379 1380 dev_info(pctrl->dev, "changing the interrupt line for pin %u to %d\n", pin, i); 1381 1382 value = (value & ~CHV_PADCTRL0_INTSEL_MASK) | (i << CHV_PADCTRL0_INTSEL_SHIFT); 1383 chv_writel(pctrl, pin, CHV_PADCTRL0, value); 1384 cctx->intr_lines[i] = pin; 1385 1386 return 0; 1387 } 1388 1389 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type) 1390 { 1391 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1392 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1393 unsigned int pin = irqd_to_hwirq(d); 1394 unsigned long flags; 1395 u32 value; 1396 int ret; 1397 1398 raw_spin_lock_irqsave(&chv_lock, flags); 1399 1400 ret = chv_gpio_set_intr_line(pctrl, pin); 1401 if (ret) 1402 goto out_unlock; 1403 1404 /* 1405 * Pins which can be used as shared interrupt are configured in 1406 * BIOS. Driver trusts BIOS configurations and assigns different 1407 * handler according to the irq type. 1408 * 1409 * Driver needs to save the mapping between each pin and 1410 * its interrupt line. 1411 * 1. If the pin cfg is locked in BIOS: 1412 * Trust BIOS has programmed IntWakeCfg bits correctly, 1413 * driver just needs to save the mapping. 1414 * 2. If the pin cfg is not locked in BIOS: 1415 * Driver programs the IntWakeCfg bits and save the mapping. 1416 */ 1417 if (!chv_pad_locked(pctrl, pin)) { 1418 value = chv_readl(pctrl, pin, CHV_PADCTRL1); 1419 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 1420 value &= ~CHV_PADCTRL1_INVRXTX_MASK; 1421 1422 if (type & IRQ_TYPE_EDGE_BOTH) { 1423 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) 1424 value |= CHV_PADCTRL1_INTWAKECFG_BOTH; 1425 else if (type & IRQ_TYPE_EDGE_RISING) 1426 value |= CHV_PADCTRL1_INTWAKECFG_RISING; 1427 else if (type & IRQ_TYPE_EDGE_FALLING) 1428 value |= CHV_PADCTRL1_INTWAKECFG_FALLING; 1429 } else if (type & IRQ_TYPE_LEVEL_MASK) { 1430 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL; 1431 if (type & IRQ_TYPE_LEVEL_LOW) 1432 value |= CHV_PADCTRL1_INVRXTX_RXDATA; 1433 } 1434 1435 chv_writel(pctrl, pin, CHV_PADCTRL1, value); 1436 } 1437 1438 if (type & IRQ_TYPE_EDGE_BOTH) 1439 irq_set_handler_locked(d, handle_edge_irq); 1440 else if (type & IRQ_TYPE_LEVEL_MASK) 1441 irq_set_handler_locked(d, handle_level_irq); 1442 1443 out_unlock: 1444 raw_spin_unlock_irqrestore(&chv_lock, flags); 1445 1446 return ret; 1447 } 1448 1449 static void chv_gpio_irq_handler(struct irq_desc *desc) 1450 { 1451 struct gpio_chip *gc = irq_desc_get_handler_data(desc); 1452 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1453 const struct intel_community *community = &pctrl->communities[0]; 1454 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1455 struct irq_chip *chip = irq_desc_get_chip(desc); 1456 unsigned long pending; 1457 unsigned long flags; 1458 u32 intr_line; 1459 1460 chained_irq_enter(chip, desc); 1461 1462 raw_spin_lock_irqsave(&chv_lock, flags); 1463 pending = chv_pctrl_readl(pctrl, CHV_INTSTAT); 1464 raw_spin_unlock_irqrestore(&chv_lock, flags); 1465 1466 for_each_set_bit(intr_line, &pending, community->nirqs) { 1467 unsigned int offset; 1468 1469 offset = cctx->intr_lines[intr_line]; 1470 if (offset == CHV_INVALID_HWIRQ) { 1471 dev_err(pctrl->dev, "interrupt on unused interrupt line %u\n", 1472 intr_line); 1473 continue; 1474 } 1475 1476 generic_handle_domain_irq(gc->irq.domain, offset); 1477 } 1478 1479 chained_irq_exit(chip, desc); 1480 } 1481 1482 /* 1483 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI 1484 * tables. Since we leave GPIOs that are not capable of generating 1485 * interrupts out of the irqdomain the numbering will be different and 1486 * cause devices using the hardcoded IRQ numbers fail. In order not to 1487 * break such machines we will only mask pins from irqdomain if the machine 1488 * is not listed below. 1489 */ 1490 static const struct dmi_system_id chv_no_valid_mask[] = { 1491 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */ 1492 { 1493 .ident = "Intel_Strago based Chromebooks (All models)", 1494 .matches = { 1495 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1496 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"), 1497 }, 1498 }, 1499 { 1500 .ident = "HP Chromebook 11 G5 (Setzer)", 1501 .matches = { 1502 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 1503 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"), 1504 }, 1505 }, 1506 { 1507 .ident = "Acer Chromebook R11 (Cyan)", 1508 .matches = { 1509 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1510 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"), 1511 }, 1512 }, 1513 { 1514 .ident = "Samsung Chromebook 3 (Celes)", 1515 .matches = { 1516 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1517 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), 1518 }, 1519 }, 1520 {} 1521 }; 1522 1523 static void chv_init_irq_valid_mask(struct gpio_chip *chip, 1524 unsigned long *valid_mask, 1525 unsigned int ngpios) 1526 { 1527 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1528 const struct intel_community *community = &pctrl->communities[0]; 1529 int i; 1530 1531 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */ 1532 for (i = 0; i < pctrl->soc->npins; i++) { 1533 const struct pinctrl_pin_desc *desc; 1534 u32 intsel; 1535 1536 desc = &pctrl->soc->pins[i]; 1537 1538 intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1539 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1540 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1541 1542 if (intsel >= community->nirqs) 1543 clear_bit(desc->number, valid_mask); 1544 } 1545 } 1546 1547 static int chv_gpio_irq_init_hw(struct gpio_chip *chip) 1548 { 1549 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1550 const struct intel_community *community = &pctrl->communities[0]; 1551 1552 /* 1553 * The same set of machines in chv_no_valid_mask[] have incorrectly 1554 * configured GPIOs that generate spurious interrupts so we use 1555 * this same list to apply another quirk for them. 1556 * 1557 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953. 1558 */ 1559 if (!pctrl->chip.irq.init_valid_mask) { 1560 /* 1561 * Mask all interrupts the community is able to generate 1562 * but leave the ones that can only generate GPEs unmasked. 1563 */ 1564 chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs)); 1565 } 1566 1567 /* Clear all interrupts */ 1568 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); 1569 1570 return 0; 1571 } 1572 1573 static int chv_gpio_add_pin_ranges(struct gpio_chip *chip) 1574 { 1575 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1576 const struct intel_community *community = &pctrl->communities[0]; 1577 const struct intel_padgroup *gpp; 1578 int ret, i; 1579 1580 for (i = 0; i < community->ngpps; i++) { 1581 gpp = &community->gpps[i]; 1582 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev), 1583 gpp->base, gpp->base, 1584 gpp->size); 1585 if (ret) { 1586 dev_err(pctrl->dev, "failed to add GPIO pin range\n"); 1587 return ret; 1588 } 1589 } 1590 1591 return 0; 1592 } 1593 1594 static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq) 1595 { 1596 const struct intel_community *community = &pctrl->communities[0]; 1597 const struct intel_padgroup *gpp; 1598 struct gpio_chip *chip = &pctrl->chip; 1599 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask); 1600 int ret, i, irq_base; 1601 1602 *chip = chv_gpio_chip; 1603 1604 chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1; 1605 chip->label = dev_name(pctrl->dev); 1606 chip->add_pin_ranges = chv_gpio_add_pin_ranges; 1607 chip->parent = pctrl->dev; 1608 chip->base = -1; 1609 1610 pctrl->irq = irq; 1611 pctrl->irqchip.name = "chv-gpio"; 1612 pctrl->irqchip.irq_startup = chv_gpio_irq_startup; 1613 pctrl->irqchip.irq_ack = chv_gpio_irq_ack; 1614 pctrl->irqchip.irq_mask = chv_gpio_irq_mask; 1615 pctrl->irqchip.irq_unmask = chv_gpio_irq_unmask; 1616 pctrl->irqchip.irq_set_type = chv_gpio_irq_type; 1617 pctrl->irqchip.flags = IRQCHIP_SKIP_SET_WAKE; 1618 1619 chip->irq.chip = &pctrl->irqchip; 1620 chip->irq.init_hw = chv_gpio_irq_init_hw; 1621 chip->irq.parent_handler = chv_gpio_irq_handler; 1622 chip->irq.num_parents = 1; 1623 chip->irq.parents = &pctrl->irq; 1624 chip->irq.default_type = IRQ_TYPE_NONE; 1625 chip->irq.handler = handle_bad_irq; 1626 if (need_valid_mask) { 1627 chip->irq.init_valid_mask = chv_init_irq_valid_mask; 1628 } else { 1629 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0, 1630 pctrl->soc->npins, NUMA_NO_NODE); 1631 if (irq_base < 0) { 1632 dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n"); 1633 return irq_base; 1634 } 1635 } 1636 1637 ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl); 1638 if (ret) { 1639 dev_err(pctrl->dev, "Failed to register gpiochip\n"); 1640 return ret; 1641 } 1642 1643 if (!need_valid_mask) { 1644 for (i = 0; i < community->ngpps; i++) { 1645 gpp = &community->gpps[i]; 1646 1647 irq_domain_associate_many(chip->irq.domain, irq_base, 1648 gpp->base, gpp->size); 1649 irq_base += gpp->size; 1650 } 1651 } 1652 1653 return 0; 1654 } 1655 1656 static acpi_status chv_pinctrl_mmio_access_handler(u32 function, 1657 acpi_physical_address address, u32 bits, u64 *value, 1658 void *handler_context, void *region_context) 1659 { 1660 struct intel_pinctrl *pctrl = region_context; 1661 unsigned long flags; 1662 acpi_status ret = AE_OK; 1663 1664 raw_spin_lock_irqsave(&chv_lock, flags); 1665 1666 if (function == ACPI_WRITE) 1667 chv_pctrl_writel(pctrl, address, *value); 1668 else if (function == ACPI_READ) 1669 *value = chv_pctrl_readl(pctrl, address); 1670 else 1671 ret = AE_BAD_PARAMETER; 1672 1673 raw_spin_unlock_irqrestore(&chv_lock, flags); 1674 1675 return ret; 1676 } 1677 1678 static int chv_pinctrl_probe(struct platform_device *pdev) 1679 { 1680 const struct intel_pinctrl_soc_data *soc_data; 1681 struct intel_community_context *cctx; 1682 struct intel_community *community; 1683 struct device *dev = &pdev->dev; 1684 struct acpi_device *adev = ACPI_COMPANION(dev); 1685 struct intel_pinctrl *pctrl; 1686 acpi_status status; 1687 unsigned int i; 1688 int ret, irq; 1689 1690 soc_data = intel_pinctrl_get_soc_data(pdev); 1691 if (IS_ERR(soc_data)) 1692 return PTR_ERR(soc_data); 1693 1694 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); 1695 if (!pctrl) 1696 return -ENOMEM; 1697 1698 pctrl->dev = dev; 1699 pctrl->soc = soc_data; 1700 1701 pctrl->ncommunities = pctrl->soc->ncommunities; 1702 pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities, 1703 pctrl->ncommunities * sizeof(*pctrl->communities), 1704 GFP_KERNEL); 1705 if (!pctrl->communities) 1706 return -ENOMEM; 1707 1708 community = &pctrl->communities[0]; 1709 community->regs = devm_platform_ioremap_resource(pdev, 0); 1710 if (IS_ERR(community->regs)) 1711 return PTR_ERR(community->regs); 1712 1713 community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF; 1714 1715 #ifdef CONFIG_PM_SLEEP 1716 pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins, 1717 sizeof(*pctrl->context.pads), 1718 GFP_KERNEL); 1719 if (!pctrl->context.pads) 1720 return -ENOMEM; 1721 #endif 1722 1723 pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities, 1724 sizeof(*pctrl->context.communities), 1725 GFP_KERNEL); 1726 if (!pctrl->context.communities) 1727 return -ENOMEM; 1728 1729 cctx = &pctrl->context.communities[0]; 1730 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) 1731 cctx->intr_lines[i] = CHV_INVALID_HWIRQ; 1732 1733 irq = platform_get_irq(pdev, 0); 1734 if (irq < 0) 1735 return irq; 1736 1737 pctrl->pctldesc = chv_pinctrl_desc; 1738 pctrl->pctldesc.name = dev_name(dev); 1739 pctrl->pctldesc.pins = pctrl->soc->pins; 1740 pctrl->pctldesc.npins = pctrl->soc->npins; 1741 1742 pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl); 1743 if (IS_ERR(pctrl->pctldev)) { 1744 dev_err(dev, "failed to register pinctrl driver\n"); 1745 return PTR_ERR(pctrl->pctldev); 1746 } 1747 1748 ret = chv_gpio_probe(pctrl, irq); 1749 if (ret) 1750 return ret; 1751 1752 status = acpi_install_address_space_handler(adev->handle, 1753 community->acpi_space_id, 1754 chv_pinctrl_mmio_access_handler, 1755 NULL, pctrl); 1756 if (ACPI_FAILURE(status)) 1757 dev_err(dev, "failed to install ACPI addr space handler\n"); 1758 1759 platform_set_drvdata(pdev, pctrl); 1760 1761 return 0; 1762 } 1763 1764 static int chv_pinctrl_remove(struct platform_device *pdev) 1765 { 1766 struct intel_pinctrl *pctrl = platform_get_drvdata(pdev); 1767 const struct intel_community *community = &pctrl->communities[0]; 1768 1769 acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev), 1770 community->acpi_space_id, 1771 chv_pinctrl_mmio_access_handler); 1772 1773 return 0; 1774 } 1775 1776 #ifdef CONFIG_PM_SLEEP 1777 static int chv_pinctrl_suspend_noirq(struct device *dev) 1778 { 1779 struct intel_pinctrl *pctrl = dev_get_drvdata(dev); 1780 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1781 unsigned long flags; 1782 int i; 1783 1784 raw_spin_lock_irqsave(&chv_lock, flags); 1785 1786 cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK); 1787 1788 for (i = 0; i < pctrl->soc->npins; i++) { 1789 const struct pinctrl_pin_desc *desc; 1790 struct intel_pad_context *ctx = &pctrl->context.pads[i]; 1791 1792 desc = &pctrl->soc->pins[i]; 1793 if (chv_pad_locked(pctrl, desc->number)) 1794 continue; 1795 1796 ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1797 ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE; 1798 1799 ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1); 1800 } 1801 1802 raw_spin_unlock_irqrestore(&chv_lock, flags); 1803 1804 return 0; 1805 } 1806 1807 static int chv_pinctrl_resume_noirq(struct device *dev) 1808 { 1809 struct intel_pinctrl *pctrl = dev_get_drvdata(dev); 1810 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1811 unsigned long flags; 1812 int i; 1813 1814 raw_spin_lock_irqsave(&chv_lock, flags); 1815 1816 /* 1817 * Mask all interrupts before restoring per-pin configuration 1818 * registers because we don't know in which state BIOS left them 1819 * upon exiting suspend. 1820 */ 1821 chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000); 1822 1823 for (i = 0; i < pctrl->soc->npins; i++) { 1824 const struct pinctrl_pin_desc *desc; 1825 struct intel_pad_context *ctx = &pctrl->context.pads[i]; 1826 u32 val; 1827 1828 desc = &pctrl->soc->pins[i]; 1829 if (chv_pad_locked(pctrl, desc->number)) 1830 continue; 1831 1832 /* Only restore if our saved state differs from the current */ 1833 val = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1834 val &= ~CHV_PADCTRL0_GPIORXSTATE; 1835 if (ctx->padctrl0 != val) { 1836 chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0); 1837 dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n", 1838 desc->number, chv_readl(pctrl, desc->number, CHV_PADCTRL0)); 1839 } 1840 1841 val = chv_readl(pctrl, desc->number, CHV_PADCTRL1); 1842 if (ctx->padctrl1 != val) { 1843 chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1); 1844 dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n", 1845 desc->number, chv_readl(pctrl, desc->number, CHV_PADCTRL1)); 1846 } 1847 } 1848 1849 /* 1850 * Now that all pins are restored to known state, we can restore 1851 * the interrupt mask register as well. 1852 */ 1853 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); 1854 chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask); 1855 1856 raw_spin_unlock_irqrestore(&chv_lock, flags); 1857 1858 return 0; 1859 } 1860 #endif 1861 1862 static const struct dev_pm_ops chv_pinctrl_pm_ops = { 1863 SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq, 1864 chv_pinctrl_resume_noirq) 1865 }; 1866 1867 static const struct acpi_device_id chv_pinctrl_acpi_match[] = { 1868 { "INT33FF", (kernel_ulong_t)chv_soc_data }, 1869 { } 1870 }; 1871 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); 1872 1873 static struct platform_driver chv_pinctrl_driver = { 1874 .probe = chv_pinctrl_probe, 1875 .remove = chv_pinctrl_remove, 1876 .driver = { 1877 .name = "cherryview-pinctrl", 1878 .pm = &chv_pinctrl_pm_ops, 1879 .acpi_match_table = chv_pinctrl_acpi_match, 1880 }, 1881 }; 1882 1883 static int __init chv_pinctrl_init(void) 1884 { 1885 return platform_driver_register(&chv_pinctrl_driver); 1886 } 1887 subsys_initcall(chv_pinctrl_init); 1888 1889 static void __exit chv_pinctrl_exit(void) 1890 { 1891 platform_driver_unregister(&chv_pinctrl_driver); 1892 } 1893 module_exit(chv_pinctrl_exit); 1894 1895 MODULE_AUTHOR("Mika Westerberg <[email protected]>"); 1896 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver"); 1897 MODULE_LICENSE("GPL v2"); 1898