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 <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/seq_file.h> 20 #include <linux/types.h> 21 22 #include <linux/pinctrl/consumer.h> 23 #include <linux/pinctrl/pinconf-generic.h> 24 #include <linux/pinctrl/pinconf.h> 25 #include <linux/pinctrl/pinctrl.h> 26 #include <linux/pinctrl/pinmux.h> 27 28 #include "pinctrl-intel.h" 29 30 #define CHV_INTSTAT 0x300 31 #define CHV_INTMASK 0x380 32 33 #define FAMILY_PAD_REGS_OFF 0x4400 34 #define FAMILY_PAD_REGS_SIZE 0x400 35 #define MAX_FAMILY_PAD_GPIO_NO 15 36 #define GPIO_REGS_SIZE 8 37 38 #define CHV_PADCTRL0 0x000 39 #define CHV_PADCTRL0_INTSEL_SHIFT 28 40 #define CHV_PADCTRL0_INTSEL_MASK GENMASK(31, 28) 41 #define CHV_PADCTRL0_TERM_UP BIT(23) 42 #define CHV_PADCTRL0_TERM_SHIFT 20 43 #define CHV_PADCTRL0_TERM_MASK GENMASK(22, 20) 44 #define CHV_PADCTRL0_TERM_20K 1 45 #define CHV_PADCTRL0_TERM_5K 2 46 #define CHV_PADCTRL0_TERM_1K 4 47 #define CHV_PADCTRL0_PMODE_SHIFT 16 48 #define CHV_PADCTRL0_PMODE_MASK GENMASK(19, 16) 49 #define CHV_PADCTRL0_GPIOEN BIT(15) 50 #define CHV_PADCTRL0_GPIOCFG_SHIFT 8 51 #define CHV_PADCTRL0_GPIOCFG_MASK GENMASK(10, 8) 52 #define CHV_PADCTRL0_GPIOCFG_GPIO 0 53 #define CHV_PADCTRL0_GPIOCFG_GPO 1 54 #define CHV_PADCTRL0_GPIOCFG_GPI 2 55 #define CHV_PADCTRL0_GPIOCFG_HIZ 3 56 #define CHV_PADCTRL0_GPIOTXSTATE BIT(1) 57 #define CHV_PADCTRL0_GPIORXSTATE BIT(0) 58 59 #define CHV_PADCTRL1 0x004 60 #define CHV_PADCTRL1_CFGLOCK BIT(31) 61 #define CHV_PADCTRL1_INVRXTX_SHIFT 4 62 #define CHV_PADCTRL1_INVRXTX_MASK GENMASK(7, 4) 63 #define CHV_PADCTRL1_INVRXTX_TXDATA BIT(7) 64 #define CHV_PADCTRL1_INVRXTX_RXDATA BIT(6) 65 #define CHV_PADCTRL1_INVRXTX_TXENABLE BIT(5) 66 #define CHV_PADCTRL1_ODEN BIT(3) 67 #define CHV_PADCTRL1_INTWAKECFG_MASK GENMASK(2, 0) 68 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1 69 #define CHV_PADCTRL1_INTWAKECFG_RISING 2 70 #define CHV_PADCTRL1_INTWAKECFG_BOTH 3 71 #define CHV_PADCTRL1_INTWAKECFG_LEVEL 4 72 73 struct intel_pad_context { 74 u32 padctrl0; 75 u32 padctrl1; 76 }; 77 78 #define CHV_INVALID_HWIRQ (~0U) 79 80 /** 81 * struct intel_community_context - community context for Cherryview 82 * @intr_lines: Mapping between 16 HW interrupt wires and GPIO offset (in GPIO number space) 83 * @saved_intmask: Interrupt mask saved for system sleep 84 */ 85 struct intel_community_context { 86 unsigned int intr_lines[16]; 87 u32 saved_intmask; 88 }; 89 90 #define PINMODE_INVERT_OE BIT(15) 91 92 #define PINMODE(m, i) ((m) | ((i) * PINMODE_INVERT_OE)) 93 94 #define CHV_GPP(start, end) \ 95 { \ 96 .base = (start), \ 97 .size = (end) - (start) + 1, \ 98 } 99 100 #define CHV_COMMUNITY(g, i, a) \ 101 { \ 102 .gpps = (g), \ 103 .ngpps = ARRAY_SIZE(g), \ 104 .nirqs = (i), \ 105 .acpi_space_id = (a), \ 106 } 107 108 static const struct pinctrl_pin_desc southwest_pins[] = { 109 PINCTRL_PIN(0, "FST_SPI_D2"), 110 PINCTRL_PIN(1, "FST_SPI_D0"), 111 PINCTRL_PIN(2, "FST_SPI_CLK"), 112 PINCTRL_PIN(3, "FST_SPI_D3"), 113 PINCTRL_PIN(4, "FST_SPI_CS1_B"), 114 PINCTRL_PIN(5, "FST_SPI_D1"), 115 PINCTRL_PIN(6, "FST_SPI_CS0_B"), 116 PINCTRL_PIN(7, "FST_SPI_CS2_B"), 117 118 PINCTRL_PIN(15, "UART1_RTS_B"), 119 PINCTRL_PIN(16, "UART1_RXD"), 120 PINCTRL_PIN(17, "UART2_RXD"), 121 PINCTRL_PIN(18, "UART1_CTS_B"), 122 PINCTRL_PIN(19, "UART2_RTS_B"), 123 PINCTRL_PIN(20, "UART1_TXD"), 124 PINCTRL_PIN(21, "UART2_TXD"), 125 PINCTRL_PIN(22, "UART2_CTS_B"), 126 127 PINCTRL_PIN(30, "MF_HDA_CLK"), 128 PINCTRL_PIN(31, "MF_HDA_RSTB"), 129 PINCTRL_PIN(32, "MF_HDA_SDIO"), 130 PINCTRL_PIN(33, "MF_HDA_SDO"), 131 PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"), 132 PINCTRL_PIN(35, "MF_HDA_SYNC"), 133 PINCTRL_PIN(36, "MF_HDA_SDI1"), 134 PINCTRL_PIN(37, "MF_HDA_DOCKENB"), 135 136 PINCTRL_PIN(45, "I2C5_SDA"), 137 PINCTRL_PIN(46, "I2C4_SDA"), 138 PINCTRL_PIN(47, "I2C6_SDA"), 139 PINCTRL_PIN(48, "I2C5_SCL"), 140 PINCTRL_PIN(49, "I2C_NFC_SDA"), 141 PINCTRL_PIN(50, "I2C4_SCL"), 142 PINCTRL_PIN(51, "I2C6_SCL"), 143 PINCTRL_PIN(52, "I2C_NFC_SCL"), 144 145 PINCTRL_PIN(60, "I2C1_SDA"), 146 PINCTRL_PIN(61, "I2C0_SDA"), 147 PINCTRL_PIN(62, "I2C2_SDA"), 148 PINCTRL_PIN(63, "I2C1_SCL"), 149 PINCTRL_PIN(64, "I2C3_SDA"), 150 PINCTRL_PIN(65, "I2C0_SCL"), 151 PINCTRL_PIN(66, "I2C2_SCL"), 152 PINCTRL_PIN(67, "I2C3_SCL"), 153 154 PINCTRL_PIN(75, "SATA_GP0"), 155 PINCTRL_PIN(76, "SATA_GP1"), 156 PINCTRL_PIN(77, "SATA_LEDN"), 157 PINCTRL_PIN(78, "SATA_GP2"), 158 PINCTRL_PIN(79, "MF_SMB_ALERTB"), 159 PINCTRL_PIN(80, "SATA_GP3"), 160 PINCTRL_PIN(81, "MF_SMB_CLK"), 161 PINCTRL_PIN(82, "MF_SMB_DATA"), 162 163 PINCTRL_PIN(90, "PCIE_CLKREQ0B"), 164 PINCTRL_PIN(91, "PCIE_CLKREQ1B"), 165 PINCTRL_PIN(92, "GP_SSP_2_CLK"), 166 PINCTRL_PIN(93, "PCIE_CLKREQ2B"), 167 PINCTRL_PIN(94, "GP_SSP_2_RXD"), 168 PINCTRL_PIN(95, "PCIE_CLKREQ3B"), 169 PINCTRL_PIN(96, "GP_SSP_2_FS"), 170 PINCTRL_PIN(97, "GP_SSP_2_TXD"), 171 }; 172 173 static const unsigned southwest_uart0_pins[] = { 16, 20 }; 174 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 }; 175 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 }; 176 static const unsigned southwest_i2c0_pins[] = { 61, 65 }; 177 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 }; 178 static const unsigned southwest_lpe_pins[] = { 179 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97, 180 }; 181 static const unsigned southwest_i2c1_pins[] = { 60, 63 }; 182 static const unsigned southwest_i2c2_pins[] = { 62, 66 }; 183 static const unsigned southwest_i2c3_pins[] = { 64, 67 }; 184 static const unsigned southwest_i2c4_pins[] = { 46, 50 }; 185 static const unsigned southwest_i2c5_pins[] = { 45, 48 }; 186 static const unsigned southwest_i2c6_pins[] = { 47, 51 }; 187 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 }; 188 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 }; 189 190 /* Some of LPE I2S TXD pins need to have OE inversion set */ 191 static const unsigned int southwest_lpe_altfuncs[] = { 192 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 30, 31, 32, 33 */ 193 PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 34, 35, 36, 37 */ 194 PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 1), /* 92, 94, 96, 97 */ 195 }; 196 197 /* 198 * Two spi3 chipselects are available in different mode than the main spi3 199 * functionality, which is using mode 2. 200 */ 201 static const unsigned int southwest_spi3_altfuncs[] = { 202 PINMODE(3, 0), PINMODE(2, 0), PINMODE(3, 0), PINMODE(2, 0), /* 76, 79, 80, 81 */ 203 PINMODE(2, 0), /* 82 */ 204 }; 205 206 static const struct intel_pingroup southwest_groups[] = { 207 PIN_GROUP("uart0_grp", southwest_uart0_pins, PINMODE(2, 0)), 208 PIN_GROUP("uart1_grp", southwest_uart1_pins, PINMODE(1, 0)), 209 PIN_GROUP("uart2_grp", southwest_uart2_pins, PINMODE(1, 0)), 210 PIN_GROUP("hda_grp", southwest_hda_pins, PINMODE(2, 0)), 211 PIN_GROUP("i2c0_grp", southwest_i2c0_pins, PINMODE(1, 1)), 212 PIN_GROUP("i2c1_grp", southwest_i2c1_pins, PINMODE(1, 1)), 213 PIN_GROUP("i2c2_grp", southwest_i2c2_pins, PINMODE(1, 1)), 214 PIN_GROUP("i2c3_grp", southwest_i2c3_pins, PINMODE(1, 1)), 215 PIN_GROUP("i2c4_grp", southwest_i2c4_pins, PINMODE(1, 1)), 216 PIN_GROUP("i2c5_grp", southwest_i2c5_pins, PINMODE(1, 1)), 217 PIN_GROUP("i2c6_grp", southwest_i2c6_pins, PINMODE(1, 1)), 218 PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, PINMODE(2, 1)), 219 PIN_GROUP("lpe_grp", southwest_lpe_pins, southwest_lpe_altfuncs), 220 PIN_GROUP("spi3_grp", southwest_spi3_pins, southwest_spi3_altfuncs), 221 }; 222 223 static const char * const southwest_uart0_groups[] = { "uart0_grp" }; 224 static const char * const southwest_uart1_groups[] = { "uart1_grp" }; 225 static const char * const southwest_uart2_groups[] = { "uart2_grp" }; 226 static const char * const southwest_hda_groups[] = { "hda_grp" }; 227 static const char * const southwest_lpe_groups[] = { "lpe_grp" }; 228 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" }; 229 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" }; 230 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" }; 231 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" }; 232 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" }; 233 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" }; 234 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" }; 235 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" }; 236 static const char * const southwest_spi3_groups[] = { "spi3_grp" }; 237 238 /* 239 * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are 240 * enabled only as GPIOs. 241 */ 242 static const struct intel_function southwest_functions[] = { 243 FUNCTION("uart0", southwest_uart0_groups), 244 FUNCTION("uart1", southwest_uart1_groups), 245 FUNCTION("uart2", southwest_uart2_groups), 246 FUNCTION("hda", southwest_hda_groups), 247 FUNCTION("lpe", southwest_lpe_groups), 248 FUNCTION("i2c0", southwest_i2c0_groups), 249 FUNCTION("i2c1", southwest_i2c1_groups), 250 FUNCTION("i2c2", southwest_i2c2_groups), 251 FUNCTION("i2c3", southwest_i2c3_groups), 252 FUNCTION("i2c4", southwest_i2c4_groups), 253 FUNCTION("i2c5", southwest_i2c5_groups), 254 FUNCTION("i2c6", southwest_i2c6_groups), 255 FUNCTION("i2c_nfc", southwest_i2c_nfc_groups), 256 FUNCTION("spi3", southwest_spi3_groups), 257 }; 258 259 static const struct intel_padgroup southwest_gpps[] = { 260 CHV_GPP(0, 7), 261 CHV_GPP(15, 22), 262 CHV_GPP(30, 37), 263 CHV_GPP(45, 52), 264 CHV_GPP(60, 67), 265 CHV_GPP(75, 82), 266 CHV_GPP(90, 97), 267 }; 268 269 /* 270 * Southwest community can generate GPIO interrupts only for the first 8 271 * interrupts. The upper half (8-15) can only be used to trigger GPEs. 272 */ 273 static const struct intel_community southwest_communities[] = { 274 CHV_COMMUNITY(southwest_gpps, 8, 0x91), 275 }; 276 277 static const struct intel_pinctrl_soc_data southwest_soc_data = { 278 .uid = "1", 279 .pins = southwest_pins, 280 .npins = ARRAY_SIZE(southwest_pins), 281 .groups = southwest_groups, 282 .ngroups = ARRAY_SIZE(southwest_groups), 283 .functions = southwest_functions, 284 .nfunctions = ARRAY_SIZE(southwest_functions), 285 .communities = southwest_communities, 286 .ncommunities = ARRAY_SIZE(southwest_communities), 287 }; 288 289 static const struct pinctrl_pin_desc north_pins[] = { 290 PINCTRL_PIN(0, "GPIO_DFX_0"), 291 PINCTRL_PIN(1, "GPIO_DFX_3"), 292 PINCTRL_PIN(2, "GPIO_DFX_7"), 293 PINCTRL_PIN(3, "GPIO_DFX_1"), 294 PINCTRL_PIN(4, "GPIO_DFX_5"), 295 PINCTRL_PIN(5, "GPIO_DFX_4"), 296 PINCTRL_PIN(6, "GPIO_DFX_8"), 297 PINCTRL_PIN(7, "GPIO_DFX_2"), 298 PINCTRL_PIN(8, "GPIO_DFX_6"), 299 300 PINCTRL_PIN(15, "GPIO_SUS0"), 301 PINCTRL_PIN(16, "SEC_GPIO_SUS10"), 302 PINCTRL_PIN(17, "GPIO_SUS3"), 303 PINCTRL_PIN(18, "GPIO_SUS7"), 304 PINCTRL_PIN(19, "GPIO_SUS1"), 305 PINCTRL_PIN(20, "GPIO_SUS5"), 306 PINCTRL_PIN(21, "SEC_GPIO_SUS11"), 307 PINCTRL_PIN(22, "GPIO_SUS4"), 308 PINCTRL_PIN(23, "SEC_GPIO_SUS8"), 309 PINCTRL_PIN(24, "GPIO_SUS2"), 310 PINCTRL_PIN(25, "GPIO_SUS6"), 311 PINCTRL_PIN(26, "CX_PREQ_B"), 312 PINCTRL_PIN(27, "SEC_GPIO_SUS9"), 313 314 PINCTRL_PIN(30, "TRST_B"), 315 PINCTRL_PIN(31, "TCK"), 316 PINCTRL_PIN(32, "PROCHOT_B"), 317 PINCTRL_PIN(33, "SVIDO_DATA"), 318 PINCTRL_PIN(34, "TMS"), 319 PINCTRL_PIN(35, "CX_PRDY_B_2"), 320 PINCTRL_PIN(36, "TDO_2"), 321 PINCTRL_PIN(37, "CX_PRDY_B"), 322 PINCTRL_PIN(38, "SVIDO_ALERT_B"), 323 PINCTRL_PIN(39, "TDO"), 324 PINCTRL_PIN(40, "SVIDO_CLK"), 325 PINCTRL_PIN(41, "TDI"), 326 327 PINCTRL_PIN(45, "GP_CAMERASB_05"), 328 PINCTRL_PIN(46, "GP_CAMERASB_02"), 329 PINCTRL_PIN(47, "GP_CAMERASB_08"), 330 PINCTRL_PIN(48, "GP_CAMERASB_00"), 331 PINCTRL_PIN(49, "GP_CAMERASB_06"), 332 PINCTRL_PIN(50, "GP_CAMERASB_10"), 333 PINCTRL_PIN(51, "GP_CAMERASB_03"), 334 PINCTRL_PIN(52, "GP_CAMERASB_09"), 335 PINCTRL_PIN(53, "GP_CAMERASB_01"), 336 PINCTRL_PIN(54, "GP_CAMERASB_07"), 337 PINCTRL_PIN(55, "GP_CAMERASB_11"), 338 PINCTRL_PIN(56, "GP_CAMERASB_04"), 339 340 PINCTRL_PIN(60, "PANEL0_BKLTEN"), 341 PINCTRL_PIN(61, "HV_DDI0_HPD"), 342 PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"), 343 PINCTRL_PIN(63, "PANEL1_BKLTCTL"), 344 PINCTRL_PIN(64, "HV_DDI1_HPD"), 345 PINCTRL_PIN(65, "PANEL0_BKLTCTL"), 346 PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"), 347 PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"), 348 PINCTRL_PIN(68, "HV_DDI2_HPD"), 349 PINCTRL_PIN(69, "PANEL1_VDDEN"), 350 PINCTRL_PIN(70, "PANEL1_BKLTEN"), 351 PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"), 352 PINCTRL_PIN(72, "PANEL0_VDDEN"), 353 }; 354 355 static const struct intel_padgroup north_gpps[] = { 356 CHV_GPP(0, 8), 357 CHV_GPP(15, 27), 358 CHV_GPP(30, 41), 359 CHV_GPP(45, 56), 360 CHV_GPP(60, 72), 361 }; 362 363 /* 364 * North community can generate GPIO interrupts only for the first 8 365 * interrupts. The upper half (8-15) can only be used to trigger GPEs. 366 */ 367 static const struct intel_community north_communities[] = { 368 CHV_COMMUNITY(north_gpps, 8, 0x92), 369 }; 370 371 static const struct intel_pinctrl_soc_data north_soc_data = { 372 .uid = "2", 373 .pins = north_pins, 374 .npins = ARRAY_SIZE(north_pins), 375 .communities = north_communities, 376 .ncommunities = ARRAY_SIZE(north_communities), 377 }; 378 379 static const struct pinctrl_pin_desc east_pins[] = { 380 PINCTRL_PIN(0, "PMU_SLP_S3_B"), 381 PINCTRL_PIN(1, "PMU_BATLOW_B"), 382 PINCTRL_PIN(2, "SUS_STAT_B"), 383 PINCTRL_PIN(3, "PMU_SLP_S0IX_B"), 384 PINCTRL_PIN(4, "PMU_AC_PRESENT"), 385 PINCTRL_PIN(5, "PMU_PLTRST_B"), 386 PINCTRL_PIN(6, "PMU_SUSCLK"), 387 PINCTRL_PIN(7, "PMU_SLP_LAN_B"), 388 PINCTRL_PIN(8, "PMU_PWRBTN_B"), 389 PINCTRL_PIN(9, "PMU_SLP_S4_B"), 390 PINCTRL_PIN(10, "PMU_WAKE_B"), 391 PINCTRL_PIN(11, "PMU_WAKE_LAN_B"), 392 393 PINCTRL_PIN(15, "MF_ISH_GPIO_3"), 394 PINCTRL_PIN(16, "MF_ISH_GPIO_7"), 395 PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"), 396 PINCTRL_PIN(18, "MF_ISH_GPIO_1"), 397 PINCTRL_PIN(19, "MF_ISH_GPIO_5"), 398 PINCTRL_PIN(20, "MF_ISH_GPIO_9"), 399 PINCTRL_PIN(21, "MF_ISH_GPIO_0"), 400 PINCTRL_PIN(22, "MF_ISH_GPIO_4"), 401 PINCTRL_PIN(23, "MF_ISH_GPIO_8"), 402 PINCTRL_PIN(24, "MF_ISH_GPIO_2"), 403 PINCTRL_PIN(25, "MF_ISH_GPIO_6"), 404 PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"), 405 }; 406 407 static const struct intel_padgroup east_gpps[] = { 408 CHV_GPP(0, 11), 409 CHV_GPP(15, 26), 410 }; 411 412 static const struct intel_community east_communities[] = { 413 CHV_COMMUNITY(east_gpps, 16, 0x93), 414 }; 415 416 static const struct intel_pinctrl_soc_data east_soc_data = { 417 .uid = "3", 418 .pins = east_pins, 419 .npins = ARRAY_SIZE(east_pins), 420 .communities = east_communities, 421 .ncommunities = ARRAY_SIZE(east_communities), 422 }; 423 424 static const struct pinctrl_pin_desc southeast_pins[] = { 425 PINCTRL_PIN(0, "MF_PLT_CLK0"), 426 PINCTRL_PIN(1, "PWM1"), 427 PINCTRL_PIN(2, "MF_PLT_CLK1"), 428 PINCTRL_PIN(3, "MF_PLT_CLK4"), 429 PINCTRL_PIN(4, "MF_PLT_CLK3"), 430 PINCTRL_PIN(5, "PWM0"), 431 PINCTRL_PIN(6, "MF_PLT_CLK5"), 432 PINCTRL_PIN(7, "MF_PLT_CLK2"), 433 434 PINCTRL_PIN(15, "SDMMC2_D3_CD_B"), 435 PINCTRL_PIN(16, "SDMMC1_CLK"), 436 PINCTRL_PIN(17, "SDMMC1_D0"), 437 PINCTRL_PIN(18, "SDMMC2_D1"), 438 PINCTRL_PIN(19, "SDMMC2_CLK"), 439 PINCTRL_PIN(20, "SDMMC1_D2"), 440 PINCTRL_PIN(21, "SDMMC2_D2"), 441 PINCTRL_PIN(22, "SDMMC2_CMD"), 442 PINCTRL_PIN(23, "SDMMC1_CMD"), 443 PINCTRL_PIN(24, "SDMMC1_D1"), 444 PINCTRL_PIN(25, "SDMMC2_D0"), 445 PINCTRL_PIN(26, "SDMMC1_D3_CD_B"), 446 447 PINCTRL_PIN(30, "SDMMC3_D1"), 448 PINCTRL_PIN(31, "SDMMC3_CLK"), 449 PINCTRL_PIN(32, "SDMMC3_D3"), 450 PINCTRL_PIN(33, "SDMMC3_D2"), 451 PINCTRL_PIN(34, "SDMMC3_CMD"), 452 PINCTRL_PIN(35, "SDMMC3_D0"), 453 454 PINCTRL_PIN(45, "MF_LPC_AD2"), 455 PINCTRL_PIN(46, "LPC_CLKRUNB"), 456 PINCTRL_PIN(47, "MF_LPC_AD0"), 457 PINCTRL_PIN(48, "LPC_FRAMEB"), 458 PINCTRL_PIN(49, "MF_LPC_CLKOUT1"), 459 PINCTRL_PIN(50, "MF_LPC_AD3"), 460 PINCTRL_PIN(51, "MF_LPC_CLKOUT0"), 461 PINCTRL_PIN(52, "MF_LPC_AD1"), 462 463 PINCTRL_PIN(60, "SPI1_MISO"), 464 PINCTRL_PIN(61, "SPI1_CSO_B"), 465 PINCTRL_PIN(62, "SPI1_CLK"), 466 PINCTRL_PIN(63, "MMC1_D6"), 467 PINCTRL_PIN(64, "SPI1_MOSI"), 468 PINCTRL_PIN(65, "MMC1_D5"), 469 PINCTRL_PIN(66, "SPI1_CS1_B"), 470 PINCTRL_PIN(67, "MMC1_D4_SD_WE"), 471 PINCTRL_PIN(68, "MMC1_D7"), 472 PINCTRL_PIN(69, "MMC1_RCLK"), 473 474 PINCTRL_PIN(75, "USB_OC1_B"), 475 PINCTRL_PIN(76, "PMU_RESETBUTTON_B"), 476 PINCTRL_PIN(77, "GPIO_ALERT"), 477 PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"), 478 PINCTRL_PIN(79, "ILB_SERIRQ"), 479 PINCTRL_PIN(80, "USB_OC0_B"), 480 PINCTRL_PIN(81, "SDMMC3_CD_B"), 481 PINCTRL_PIN(82, "SPKR"), 482 PINCTRL_PIN(83, "SUSPWRDNACK"), 483 PINCTRL_PIN(84, "SPARE_PIN"), 484 PINCTRL_PIN(85, "SDMMC3_1P8_EN"), 485 }; 486 487 static const unsigned southeast_pwm0_pins[] = { 5 }; 488 static const unsigned southeast_pwm1_pins[] = { 1 }; 489 static const unsigned southeast_sdmmc1_pins[] = { 490 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69, 491 }; 492 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 }; 493 static const unsigned southeast_sdmmc3_pins[] = { 494 30, 31, 32, 33, 34, 35, 78, 81, 85, 495 }; 496 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 }; 497 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 }; 498 499 static const struct intel_pingroup southeast_groups[] = { 500 PIN_GROUP("pwm0_grp", southeast_pwm0_pins, PINMODE(1, 0)), 501 PIN_GROUP("pwm1_grp", southeast_pwm1_pins, PINMODE(1, 0)), 502 PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, PINMODE(1, 0)), 503 PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, PINMODE(1, 0)), 504 PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, PINMODE(1, 0)), 505 PIN_GROUP("spi1_grp", southeast_spi1_pins, PINMODE(1, 0)), 506 PIN_GROUP("spi2_grp", southeast_spi2_pins, PINMODE(4, 0)), 507 }; 508 509 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" }; 510 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" }; 511 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" }; 512 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" }; 513 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" }; 514 static const char * const southeast_spi1_groups[] = { "spi1_grp" }; 515 static const char * const southeast_spi2_groups[] = { "spi2_grp" }; 516 517 static const struct intel_function southeast_functions[] = { 518 FUNCTION("pwm0", southeast_pwm0_groups), 519 FUNCTION("pwm1", southeast_pwm1_groups), 520 FUNCTION("sdmmc1", southeast_sdmmc1_groups), 521 FUNCTION("sdmmc2", southeast_sdmmc2_groups), 522 FUNCTION("sdmmc3", southeast_sdmmc3_groups), 523 FUNCTION("spi1", southeast_spi1_groups), 524 FUNCTION("spi2", southeast_spi2_groups), 525 }; 526 527 static const struct intel_padgroup southeast_gpps[] = { 528 CHV_GPP(0, 7), 529 CHV_GPP(15, 26), 530 CHV_GPP(30, 35), 531 CHV_GPP(45, 52), 532 CHV_GPP(60, 69), 533 CHV_GPP(75, 85), 534 }; 535 536 static const struct intel_community southeast_communities[] = { 537 CHV_COMMUNITY(southeast_gpps, 16, 0x94), 538 }; 539 540 static const struct intel_pinctrl_soc_data southeast_soc_data = { 541 .uid = "4", 542 .pins = southeast_pins, 543 .npins = ARRAY_SIZE(southeast_pins), 544 .groups = southeast_groups, 545 .ngroups = ARRAY_SIZE(southeast_groups), 546 .functions = southeast_functions, 547 .nfunctions = ARRAY_SIZE(southeast_functions), 548 .communities = southeast_communities, 549 .ncommunities = ARRAY_SIZE(southeast_communities), 550 }; 551 552 static const struct intel_pinctrl_soc_data *chv_soc_data[] = { 553 &southwest_soc_data, 554 &north_soc_data, 555 &east_soc_data, 556 &southeast_soc_data, 557 NULL 558 }; 559 560 /* 561 * Lock to serialize register accesses 562 * 563 * Due to a silicon issue, a shared lock must be used to prevent 564 * concurrent accesses across the 4 GPIO controllers. 565 * 566 * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005), 567 * errata #CHT34, for further information. 568 */ 569 static DEFINE_RAW_SPINLOCK(chv_lock); 570 chv_pctrl_readl(struct intel_pinctrl * pctrl,unsigned int offset)571 static u32 chv_pctrl_readl(struct intel_pinctrl *pctrl, unsigned int offset) 572 { 573 const struct intel_community *community = &pctrl->communities[0]; 574 575 return readl(community->regs + offset); 576 } 577 chv_pctrl_writel(struct intel_pinctrl * pctrl,unsigned int offset,u32 value)578 static void chv_pctrl_writel(struct intel_pinctrl *pctrl, unsigned int offset, u32 value) 579 { 580 const struct intel_community *community = &pctrl->communities[0]; 581 void __iomem *reg = community->regs + offset; 582 583 /* Write and simple read back to confirm the bus transferring done */ 584 writel(value, reg); 585 readl(reg); 586 } 587 chv_padreg(struct intel_pinctrl * pctrl,unsigned int offset,unsigned int reg)588 static void __iomem *chv_padreg(struct intel_pinctrl *pctrl, unsigned int offset, 589 unsigned int reg) 590 { 591 const struct intel_community *community = &pctrl->communities[0]; 592 unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO; 593 unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO; 594 595 offset = FAMILY_PAD_REGS_SIZE * family_no + GPIO_REGS_SIZE * pad_no; 596 597 return community->pad_regs + offset + reg; 598 } 599 chv_readl(struct intel_pinctrl * pctrl,unsigned int pin,unsigned int offset)600 static u32 chv_readl(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset) 601 { 602 return readl(chv_padreg(pctrl, pin, offset)); 603 } 604 chv_writel(struct intel_pinctrl * pctrl,unsigned int pin,unsigned int offset,u32 value)605 static void chv_writel(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset, u32 value) 606 { 607 void __iomem *reg = chv_padreg(pctrl, pin, offset); 608 609 /* Write and simple read back to confirm the bus transferring done */ 610 writel(value, reg); 611 readl(reg); 612 } 613 614 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */ chv_pad_locked(struct intel_pinctrl * pctrl,unsigned int offset)615 static bool chv_pad_locked(struct intel_pinctrl *pctrl, unsigned int offset) 616 { 617 return chv_readl(pctrl, offset, CHV_PADCTRL1) & CHV_PADCTRL1_CFGLOCK; 618 } 619 chv_pin_dbg_show(struct pinctrl_dev * pctldev,struct seq_file * s,unsigned int offset)620 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, 621 unsigned int offset) 622 { 623 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 624 unsigned long flags; 625 u32 ctrl0, ctrl1; 626 bool locked; 627 628 raw_spin_lock_irqsave(&chv_lock, flags); 629 630 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 631 ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1); 632 locked = chv_pad_locked(pctrl, offset); 633 634 raw_spin_unlock_irqrestore(&chv_lock, flags); 635 636 if (ctrl0 & CHV_PADCTRL0_GPIOEN) { 637 seq_puts(s, "GPIO "); 638 } else { 639 u32 mode; 640 641 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK; 642 mode >>= CHV_PADCTRL0_PMODE_SHIFT; 643 644 seq_printf(s, "mode %d ", mode); 645 } 646 647 seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1); 648 649 if (locked) 650 seq_puts(s, " [LOCKED]"); 651 } 652 653 static const struct pinctrl_ops chv_pinctrl_ops = { 654 .get_groups_count = intel_get_groups_count, 655 .get_group_name = intel_get_group_name, 656 .get_group_pins = intel_get_group_pins, 657 .pin_dbg_show = chv_pin_dbg_show, 658 }; 659 chv_pinmux_set_mux(struct pinctrl_dev * pctldev,unsigned int function,unsigned int group)660 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, 661 unsigned int function, unsigned int group) 662 { 663 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 664 struct device *dev = pctrl->dev; 665 const struct intel_pingroup *grp; 666 unsigned long flags; 667 int i; 668 669 grp = &pctrl->soc->groups[group]; 670 671 raw_spin_lock_irqsave(&chv_lock, flags); 672 673 /* Check first that the pad is not locked */ 674 for (i = 0; i < grp->grp.npins; i++) { 675 if (chv_pad_locked(pctrl, grp->grp.pins[i])) { 676 raw_spin_unlock_irqrestore(&chv_lock, flags); 677 dev_warn(dev, "unable to set mode for locked pin %u\n", grp->grp.pins[i]); 678 return -EBUSY; 679 } 680 } 681 682 for (i = 0; i < grp->grp.npins; i++) { 683 int pin = grp->grp.pins[i]; 684 unsigned int mode; 685 bool invert_oe; 686 u32 value; 687 688 /* Check if there is pin-specific config */ 689 if (grp->modes) 690 mode = grp->modes[i]; 691 else 692 mode = grp->mode; 693 694 /* Extract OE inversion */ 695 invert_oe = mode & PINMODE_INVERT_OE; 696 mode &= ~PINMODE_INVERT_OE; 697 698 value = chv_readl(pctrl, pin, CHV_PADCTRL0); 699 /* Disable GPIO mode */ 700 value &= ~CHV_PADCTRL0_GPIOEN; 701 /* Set to desired mode */ 702 value &= ~CHV_PADCTRL0_PMODE_MASK; 703 value |= mode << CHV_PADCTRL0_PMODE_SHIFT; 704 chv_writel(pctrl, pin, CHV_PADCTRL0, value); 705 706 /* Update for invert_oe */ 707 value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK; 708 if (invert_oe) 709 value |= CHV_PADCTRL1_INVRXTX_TXENABLE; 710 chv_writel(pctrl, pin, CHV_PADCTRL1, value); 711 712 dev_dbg(dev, "configured pin %u mode %u OE %sinverted\n", pin, mode, 713 invert_oe ? "" : "not "); 714 } 715 716 raw_spin_unlock_irqrestore(&chv_lock, flags); 717 718 return 0; 719 } 720 chv_gpio_clear_triggering(struct intel_pinctrl * pctrl,unsigned int offset)721 static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl, 722 unsigned int offset) 723 { 724 u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK; 725 u32 value; 726 727 /* 728 * One some devices the GPIO should output the inverted value from what 729 * device-drivers / ACPI code expects (inverted external buffer?). The 730 * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag, 731 * preserve this flag if the pin is already setup as GPIO. 732 */ 733 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 734 if (value & CHV_PADCTRL0_GPIOEN) 735 invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA; 736 737 value = chv_readl(pctrl, offset, CHV_PADCTRL1); 738 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 739 value &= ~invrxtx_mask; 740 chv_writel(pctrl, offset, CHV_PADCTRL1, value); 741 } 742 chv_gpio_request_enable(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned int offset)743 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev, 744 struct pinctrl_gpio_range *range, 745 unsigned int offset) 746 { 747 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 748 unsigned long flags; 749 u32 value; 750 751 raw_spin_lock_irqsave(&chv_lock, flags); 752 753 if (chv_pad_locked(pctrl, offset)) { 754 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 755 if (!(value & CHV_PADCTRL0_GPIOEN)) { 756 /* Locked so cannot enable */ 757 raw_spin_unlock_irqrestore(&chv_lock, flags); 758 return -EBUSY; 759 } 760 } else { 761 struct intel_community_context *cctx = &pctrl->context.communities[0]; 762 int i; 763 764 /* Reset the interrupt mapping */ 765 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) { 766 if (cctx->intr_lines[i] == offset) { 767 cctx->intr_lines[i] = CHV_INVALID_HWIRQ; 768 break; 769 } 770 } 771 772 /* Disable interrupt generation */ 773 chv_gpio_clear_triggering(pctrl, offset); 774 775 value = chv_readl(pctrl, offset, CHV_PADCTRL0); 776 777 /* 778 * If the pin is in HiZ mode (both TX and RX buffers are 779 * disabled) we turn it to be input now. 780 */ 781 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) == 782 (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) { 783 value &= ~CHV_PADCTRL0_GPIOCFG_MASK; 784 value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; 785 } 786 787 /* Switch to a GPIO mode */ 788 value |= CHV_PADCTRL0_GPIOEN; 789 chv_writel(pctrl, offset, CHV_PADCTRL0, value); 790 } 791 792 raw_spin_unlock_irqrestore(&chv_lock, flags); 793 794 return 0; 795 } 796 chv_gpio_disable_free(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned int offset)797 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev, 798 struct pinctrl_gpio_range *range, 799 unsigned int offset) 800 { 801 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 802 unsigned long flags; 803 804 raw_spin_lock_irqsave(&chv_lock, flags); 805 806 if (!chv_pad_locked(pctrl, offset)) 807 chv_gpio_clear_triggering(pctrl, offset); 808 809 raw_spin_unlock_irqrestore(&chv_lock, flags); 810 } 811 chv_gpio_set_direction(struct pinctrl_dev * pctldev,struct pinctrl_gpio_range * range,unsigned int offset,bool input)812 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev, 813 struct pinctrl_gpio_range *range, 814 unsigned int offset, bool input) 815 { 816 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 817 unsigned long flags; 818 u32 ctrl0; 819 820 raw_spin_lock_irqsave(&chv_lock, flags); 821 822 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK; 823 if (input) 824 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; 825 else 826 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT; 827 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); 828 829 raw_spin_unlock_irqrestore(&chv_lock, flags); 830 831 return 0; 832 } 833 834 static const struct pinmux_ops chv_pinmux_ops = { 835 .get_functions_count = intel_get_functions_count, 836 .get_function_name = intel_get_function_name, 837 .get_function_groups = intel_get_function_groups, 838 .set_mux = chv_pinmux_set_mux, 839 .gpio_request_enable = chv_gpio_request_enable, 840 .gpio_disable_free = chv_gpio_disable_free, 841 .gpio_set_direction = chv_gpio_set_direction, 842 }; 843 chv_config_get(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * config)844 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin, 845 unsigned long *config) 846 { 847 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 848 enum pin_config_param param = pinconf_to_config_param(*config); 849 unsigned long flags; 850 u32 ctrl0, ctrl1; 851 u16 arg = 0; 852 u32 term; 853 854 raw_spin_lock_irqsave(&chv_lock, flags); 855 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); 856 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); 857 raw_spin_unlock_irqrestore(&chv_lock, flags); 858 859 term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT; 860 861 switch (param) { 862 case PIN_CONFIG_BIAS_DISABLE: 863 if (term) 864 return -EINVAL; 865 break; 866 867 case PIN_CONFIG_BIAS_PULL_UP: 868 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP)) 869 return -EINVAL; 870 871 switch (term) { 872 case CHV_PADCTRL0_TERM_20K: 873 arg = 20000; 874 break; 875 case CHV_PADCTRL0_TERM_5K: 876 arg = 5000; 877 break; 878 case CHV_PADCTRL0_TERM_1K: 879 arg = 1000; 880 break; 881 } 882 883 break; 884 885 case PIN_CONFIG_BIAS_PULL_DOWN: 886 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP)) 887 return -EINVAL; 888 889 switch (term) { 890 case CHV_PADCTRL0_TERM_20K: 891 arg = 20000; 892 break; 893 case CHV_PADCTRL0_TERM_5K: 894 arg = 5000; 895 break; 896 } 897 898 break; 899 900 case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: { 901 u32 cfg; 902 903 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 904 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 905 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ) 906 return -EINVAL; 907 908 break; 909 910 case PIN_CONFIG_DRIVE_PUSH_PULL: 911 if (ctrl1 & CHV_PADCTRL1_ODEN) 912 return -EINVAL; 913 break; 914 915 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 916 if (!(ctrl1 & CHV_PADCTRL1_ODEN)) 917 return -EINVAL; 918 break; 919 } 920 921 default: 922 return -ENOTSUPP; 923 } 924 925 *config = pinconf_to_config_packed(param, arg); 926 return 0; 927 } 928 chv_config_set_pull(struct intel_pinctrl * pctrl,unsigned int pin,enum pin_config_param param,u32 arg)929 static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin, 930 enum pin_config_param param, u32 arg) 931 { 932 unsigned long flags; 933 u32 ctrl0, pull; 934 935 raw_spin_lock_irqsave(&chv_lock, flags); 936 ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); 937 938 switch (param) { 939 case PIN_CONFIG_BIAS_DISABLE: 940 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 941 break; 942 943 case PIN_CONFIG_BIAS_PULL_UP: 944 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 945 946 switch (arg) { 947 case 1000: 948 /* For 1k there is only pull up */ 949 pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT; 950 break; 951 case 5000: 952 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 953 break; 954 case 20000: 955 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 956 break; 957 default: 958 raw_spin_unlock_irqrestore(&chv_lock, flags); 959 return -EINVAL; 960 } 961 962 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull; 963 break; 964 965 case PIN_CONFIG_BIAS_PULL_DOWN: 966 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); 967 968 switch (arg) { 969 case 5000: 970 pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; 971 break; 972 case 20000: 973 pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; 974 break; 975 default: 976 raw_spin_unlock_irqrestore(&chv_lock, flags); 977 return -EINVAL; 978 } 979 980 ctrl0 |= pull; 981 break; 982 983 default: 984 raw_spin_unlock_irqrestore(&chv_lock, flags); 985 return -EINVAL; 986 } 987 988 chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0); 989 raw_spin_unlock_irqrestore(&chv_lock, flags); 990 991 return 0; 992 } 993 chv_config_set_oden(struct intel_pinctrl * pctrl,unsigned int pin,bool enable)994 static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin, 995 bool enable) 996 { 997 unsigned long flags; 998 u32 ctrl1; 999 1000 raw_spin_lock_irqsave(&chv_lock, flags); 1001 ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); 1002 1003 if (enable) 1004 ctrl1 |= CHV_PADCTRL1_ODEN; 1005 else 1006 ctrl1 &= ~CHV_PADCTRL1_ODEN; 1007 1008 chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1); 1009 raw_spin_unlock_irqrestore(&chv_lock, flags); 1010 1011 return 0; 1012 } 1013 chv_config_set(struct pinctrl_dev * pctldev,unsigned int pin,unsigned long * configs,unsigned int nconfigs)1014 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin, 1015 unsigned long *configs, unsigned int nconfigs) 1016 { 1017 struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); 1018 struct device *dev = pctrl->dev; 1019 enum pin_config_param param; 1020 int i, ret; 1021 u32 arg; 1022 1023 if (chv_pad_locked(pctrl, pin)) 1024 return -EBUSY; 1025 1026 for (i = 0; i < nconfigs; i++) { 1027 param = pinconf_to_config_param(configs[i]); 1028 arg = pinconf_to_config_argument(configs[i]); 1029 1030 switch (param) { 1031 case PIN_CONFIG_BIAS_DISABLE: 1032 case PIN_CONFIG_BIAS_PULL_UP: 1033 case PIN_CONFIG_BIAS_PULL_DOWN: 1034 ret = chv_config_set_pull(pctrl, pin, param, arg); 1035 if (ret) 1036 return ret; 1037 break; 1038 1039 case PIN_CONFIG_DRIVE_PUSH_PULL: 1040 ret = chv_config_set_oden(pctrl, pin, false); 1041 if (ret) 1042 return ret; 1043 break; 1044 1045 case PIN_CONFIG_DRIVE_OPEN_DRAIN: 1046 ret = chv_config_set_oden(pctrl, pin, true); 1047 if (ret) 1048 return ret; 1049 break; 1050 1051 default: 1052 return -ENOTSUPP; 1053 } 1054 1055 dev_dbg(dev, "pin %d set config %d arg %u\n", pin, param, arg); 1056 } 1057 1058 return 0; 1059 } 1060 chv_config_group_get(struct pinctrl_dev * pctldev,unsigned int group,unsigned long * config)1061 static int chv_config_group_get(struct pinctrl_dev *pctldev, 1062 unsigned int group, 1063 unsigned long *config) 1064 { 1065 const unsigned int *pins; 1066 unsigned int npins; 1067 int ret; 1068 1069 ret = intel_get_group_pins(pctldev, group, &pins, &npins); 1070 if (ret) 1071 return ret; 1072 1073 ret = chv_config_get(pctldev, pins[0], config); 1074 if (ret) 1075 return ret; 1076 1077 return 0; 1078 } 1079 chv_config_group_set(struct pinctrl_dev * pctldev,unsigned int group,unsigned long * configs,unsigned int num_configs)1080 static int chv_config_group_set(struct pinctrl_dev *pctldev, 1081 unsigned int group, unsigned long *configs, 1082 unsigned int num_configs) 1083 { 1084 const unsigned int *pins; 1085 unsigned int npins; 1086 int i, ret; 1087 1088 ret = intel_get_group_pins(pctldev, group, &pins, &npins); 1089 if (ret) 1090 return ret; 1091 1092 for (i = 0; i < npins; i++) { 1093 ret = chv_config_set(pctldev, pins[i], configs, num_configs); 1094 if (ret) 1095 return ret; 1096 } 1097 1098 return 0; 1099 } 1100 1101 static const struct pinconf_ops chv_pinconf_ops = { 1102 .is_generic = true, 1103 .pin_config_set = chv_config_set, 1104 .pin_config_get = chv_config_get, 1105 .pin_config_group_get = chv_config_group_get, 1106 .pin_config_group_set = chv_config_group_set, 1107 }; 1108 1109 static struct pinctrl_desc chv_pinctrl_desc = { 1110 .pctlops = &chv_pinctrl_ops, 1111 .pmxops = &chv_pinmux_ops, 1112 .confops = &chv_pinconf_ops, 1113 .owner = THIS_MODULE, 1114 }; 1115 chv_gpio_get(struct gpio_chip * chip,unsigned int offset)1116 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset) 1117 { 1118 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1119 unsigned long flags; 1120 u32 ctrl0, cfg; 1121 1122 raw_spin_lock_irqsave(&chv_lock, flags); 1123 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1124 raw_spin_unlock_irqrestore(&chv_lock, flags); 1125 1126 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1127 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1128 1129 if (cfg == CHV_PADCTRL0_GPIOCFG_GPO) 1130 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE); 1131 return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE); 1132 } 1133 chv_gpio_set(struct gpio_chip * chip,unsigned int offset,int value)1134 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) 1135 { 1136 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1137 unsigned long flags; 1138 u32 ctrl0; 1139 1140 raw_spin_lock_irqsave(&chv_lock, flags); 1141 1142 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1143 1144 if (value) 1145 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE; 1146 else 1147 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE; 1148 1149 chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); 1150 1151 raw_spin_unlock_irqrestore(&chv_lock, flags); 1152 } 1153 chv_gpio_get_direction(struct gpio_chip * chip,unsigned int offset)1154 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) 1155 { 1156 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1157 u32 ctrl0, direction; 1158 unsigned long flags; 1159 1160 raw_spin_lock_irqsave(&chv_lock, flags); 1161 ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); 1162 raw_spin_unlock_irqrestore(&chv_lock, flags); 1163 1164 direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; 1165 direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT; 1166 1167 if (direction == CHV_PADCTRL0_GPIOCFG_GPO) 1168 return GPIO_LINE_DIRECTION_OUT; 1169 1170 return GPIO_LINE_DIRECTION_IN; 1171 } 1172 chv_gpio_direction_input(struct gpio_chip * chip,unsigned int offset)1173 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) 1174 { 1175 return pinctrl_gpio_direction_input(chip->base + offset); 1176 } 1177 chv_gpio_direction_output(struct gpio_chip * chip,unsigned int offset,int value)1178 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, 1179 int value) 1180 { 1181 chv_gpio_set(chip, offset, value); 1182 return pinctrl_gpio_direction_output(chip->base + offset); 1183 } 1184 1185 static const struct gpio_chip chv_gpio_chip = { 1186 .owner = THIS_MODULE, 1187 .request = gpiochip_generic_request, 1188 .free = gpiochip_generic_free, 1189 .get_direction = chv_gpio_get_direction, 1190 .direction_input = chv_gpio_direction_input, 1191 .direction_output = chv_gpio_direction_output, 1192 .get = chv_gpio_get, 1193 .set = chv_gpio_set, 1194 }; 1195 chv_gpio_irq_ack(struct irq_data * d)1196 static void chv_gpio_irq_ack(struct irq_data *d) 1197 { 1198 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1199 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1200 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1201 u32 intr_line; 1202 1203 raw_spin_lock(&chv_lock); 1204 1205 intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0); 1206 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1207 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1208 chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line)); 1209 1210 raw_spin_unlock(&chv_lock); 1211 } 1212 chv_gpio_irq_mask_unmask(struct gpio_chip * gc,irq_hw_number_t hwirq,bool mask)1213 static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask) 1214 { 1215 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1216 u32 value, intr_line; 1217 unsigned long flags; 1218 1219 raw_spin_lock_irqsave(&chv_lock, flags); 1220 1221 intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0); 1222 intr_line &= CHV_PADCTRL0_INTSEL_MASK; 1223 intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; 1224 1225 value = chv_pctrl_readl(pctrl, CHV_INTMASK); 1226 if (mask) 1227 value &= ~BIT(intr_line); 1228 else 1229 value |= BIT(intr_line); 1230 chv_pctrl_writel(pctrl, CHV_INTMASK, value); 1231 1232 raw_spin_unlock_irqrestore(&chv_lock, flags); 1233 } 1234 chv_gpio_irq_mask(struct irq_data * d)1235 static void chv_gpio_irq_mask(struct irq_data *d) 1236 { 1237 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1238 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1239 1240 chv_gpio_irq_mask_unmask(gc, hwirq, true); 1241 gpiochip_disable_irq(gc, hwirq); 1242 } 1243 chv_gpio_irq_unmask(struct irq_data * d)1244 static void chv_gpio_irq_unmask(struct irq_data *d) 1245 { 1246 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1247 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1248 1249 gpiochip_enable_irq(gc, hwirq); 1250 chv_gpio_irq_mask_unmask(gc, hwirq, false); 1251 } 1252 chv_gpio_irq_startup(struct irq_data * d)1253 static unsigned chv_gpio_irq_startup(struct irq_data *d) 1254 { 1255 /* 1256 * Check if the interrupt has been requested with 0 as triggering 1257 * type. In that case it is assumed that the current values 1258 * programmed to the hardware are used (e.g BIOS configured 1259 * defaults). 1260 * 1261 * In that case ->irq_set_type() will never be called so we need to 1262 * read back the values from hardware now, set correct flow handler 1263 * and update mappings before the interrupt is being used. 1264 */ 1265 if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) { 1266 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1267 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1268 struct device *dev = pctrl->dev; 1269 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1270 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1271 irq_flow_handler_t handler; 1272 unsigned long flags; 1273 u32 intsel, value; 1274 1275 raw_spin_lock_irqsave(&chv_lock, flags); 1276 intsel = chv_readl(pctrl, hwirq, CHV_PADCTRL0); 1277 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1278 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1279 1280 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1); 1281 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL) 1282 handler = handle_level_irq; 1283 else 1284 handler = handle_edge_irq; 1285 1286 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { 1287 irq_set_handler_locked(d, handler); 1288 dev_dbg(dev, "using interrupt line %u for IRQ_TYPE_NONE on pin %lu\n", 1289 intsel, hwirq); 1290 cctx->intr_lines[intsel] = hwirq; 1291 } 1292 raw_spin_unlock_irqrestore(&chv_lock, flags); 1293 } 1294 1295 chv_gpio_irq_unmask(d); 1296 return 0; 1297 } 1298 chv_gpio_set_intr_line(struct intel_pinctrl * pctrl,unsigned int pin)1299 static int chv_gpio_set_intr_line(struct intel_pinctrl *pctrl, unsigned int pin) 1300 { 1301 struct device *dev = pctrl->dev; 1302 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1303 const struct intel_community *community = &pctrl->communities[0]; 1304 u32 value, intsel; 1305 int i; 1306 1307 value = chv_readl(pctrl, pin, CHV_PADCTRL0); 1308 intsel = (value & CHV_PADCTRL0_INTSEL_MASK) >> CHV_PADCTRL0_INTSEL_SHIFT; 1309 1310 if (cctx->intr_lines[intsel] == pin) 1311 return 0; 1312 1313 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { 1314 dev_dbg(dev, "using interrupt line %u for pin %u\n", intsel, pin); 1315 cctx->intr_lines[intsel] = pin; 1316 return 0; 1317 } 1318 1319 /* 1320 * The interrupt line selected by the BIOS is already in use by 1321 * another pin, this is a known BIOS bug found on several models. 1322 * But this may also be caused by Linux deciding to use a pin as 1323 * IRQ which was not expected to be used as such by the BIOS authors, 1324 * so log this at info level only. 1325 */ 1326 dev_info(dev, "interrupt line %u is used by both pin %u and pin %u\n", intsel, 1327 cctx->intr_lines[intsel], pin); 1328 1329 if (chv_pad_locked(pctrl, pin)) 1330 return -EBUSY; 1331 1332 /* 1333 * The BIOS fills the interrupt lines from 0 counting up, start at 1334 * the other end to find a free interrupt line to workaround this. 1335 */ 1336 for (i = community->nirqs - 1; i >= 0; i--) { 1337 if (cctx->intr_lines[i] == CHV_INVALID_HWIRQ) 1338 break; 1339 } 1340 if (i < 0) 1341 return -EBUSY; 1342 1343 dev_info(dev, "changing the interrupt line for pin %u to %d\n", pin, i); 1344 1345 value = (value & ~CHV_PADCTRL0_INTSEL_MASK) | (i << CHV_PADCTRL0_INTSEL_SHIFT); 1346 chv_writel(pctrl, pin, CHV_PADCTRL0, value); 1347 cctx->intr_lines[i] = pin; 1348 1349 return 0; 1350 } 1351 chv_gpio_irq_type(struct irq_data * d,unsigned int type)1352 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type) 1353 { 1354 struct gpio_chip *gc = irq_data_get_irq_chip_data(d); 1355 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1356 irq_hw_number_t hwirq = irqd_to_hwirq(d); 1357 unsigned long flags; 1358 u32 value; 1359 int ret; 1360 1361 raw_spin_lock_irqsave(&chv_lock, flags); 1362 1363 ret = chv_gpio_set_intr_line(pctrl, hwirq); 1364 if (ret) { 1365 raw_spin_unlock_irqrestore(&chv_lock, flags); 1366 return ret; 1367 } 1368 1369 /* 1370 * Pins which can be used as shared interrupt are configured in 1371 * BIOS. Driver trusts BIOS configurations and assigns different 1372 * handler according to the irq type. 1373 * 1374 * Driver needs to save the mapping between each pin and 1375 * its interrupt line. 1376 * 1. If the pin cfg is locked in BIOS: 1377 * Trust BIOS has programmed IntWakeCfg bits correctly, 1378 * driver just needs to save the mapping. 1379 * 2. If the pin cfg is not locked in BIOS: 1380 * Driver programs the IntWakeCfg bits and save the mapping. 1381 */ 1382 if (!chv_pad_locked(pctrl, hwirq)) { 1383 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1); 1384 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; 1385 value &= ~CHV_PADCTRL1_INVRXTX_MASK; 1386 1387 if (type & IRQ_TYPE_EDGE_BOTH) { 1388 if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) 1389 value |= CHV_PADCTRL1_INTWAKECFG_BOTH; 1390 else if (type & IRQ_TYPE_EDGE_RISING) 1391 value |= CHV_PADCTRL1_INTWAKECFG_RISING; 1392 else if (type & IRQ_TYPE_EDGE_FALLING) 1393 value |= CHV_PADCTRL1_INTWAKECFG_FALLING; 1394 } else if (type & IRQ_TYPE_LEVEL_MASK) { 1395 value |= CHV_PADCTRL1_INTWAKECFG_LEVEL; 1396 if (type & IRQ_TYPE_LEVEL_LOW) 1397 value |= CHV_PADCTRL1_INVRXTX_RXDATA; 1398 } 1399 1400 chv_writel(pctrl, hwirq, CHV_PADCTRL1, value); 1401 } 1402 1403 if (type & IRQ_TYPE_EDGE_BOTH) 1404 irq_set_handler_locked(d, handle_edge_irq); 1405 else if (type & IRQ_TYPE_LEVEL_MASK) 1406 irq_set_handler_locked(d, handle_level_irq); 1407 1408 raw_spin_unlock_irqrestore(&chv_lock, flags); 1409 1410 return 0; 1411 } 1412 1413 static const struct irq_chip chv_gpio_irq_chip = { 1414 .name = "chv-gpio", 1415 .irq_startup = chv_gpio_irq_startup, 1416 .irq_ack = chv_gpio_irq_ack, 1417 .irq_mask = chv_gpio_irq_mask, 1418 .irq_unmask = chv_gpio_irq_unmask, 1419 .irq_set_type = chv_gpio_irq_type, 1420 .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE, 1421 GPIOCHIP_IRQ_RESOURCE_HELPERS, 1422 }; 1423 chv_gpio_irq_handler(struct irq_desc * desc)1424 static void chv_gpio_irq_handler(struct irq_desc *desc) 1425 { 1426 struct gpio_chip *gc = irq_desc_get_handler_data(desc); 1427 struct intel_pinctrl *pctrl = gpiochip_get_data(gc); 1428 struct device *dev = pctrl->dev; 1429 const struct intel_community *community = &pctrl->communities[0]; 1430 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1431 struct irq_chip *chip = irq_desc_get_chip(desc); 1432 unsigned long pending; 1433 unsigned long flags; 1434 u32 intr_line; 1435 1436 chained_irq_enter(chip, desc); 1437 1438 raw_spin_lock_irqsave(&chv_lock, flags); 1439 pending = chv_pctrl_readl(pctrl, CHV_INTSTAT); 1440 raw_spin_unlock_irqrestore(&chv_lock, flags); 1441 1442 for_each_set_bit(intr_line, &pending, community->nirqs) { 1443 unsigned int offset; 1444 1445 offset = cctx->intr_lines[intr_line]; 1446 if (offset == CHV_INVALID_HWIRQ) { 1447 dev_warn_once(dev, "interrupt on unmapped interrupt line %u\n", intr_line); 1448 /* Some boards expect hwirq 0 to trigger in this case */ 1449 offset = 0; 1450 } 1451 1452 generic_handle_domain_irq(gc->irq.domain, offset); 1453 } 1454 1455 chained_irq_exit(chip, desc); 1456 } 1457 1458 /* 1459 * Certain machines seem to hardcode Linux IRQ numbers in their ACPI 1460 * tables. Since we leave GPIOs that are not capable of generating 1461 * interrupts out of the irqdomain the numbering will be different and 1462 * cause devices using the hardcoded IRQ numbers fail. In order not to 1463 * break such machines we will only mask pins from irqdomain if the machine 1464 * is not listed below. 1465 */ 1466 static const struct dmi_system_id chv_no_valid_mask[] = { 1467 /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */ 1468 { 1469 .ident = "Intel_Strago based Chromebooks (All models)", 1470 .matches = { 1471 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1472 DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"), 1473 }, 1474 }, 1475 { 1476 .ident = "HP Chromebook 11 G5 (Setzer)", 1477 .matches = { 1478 DMI_MATCH(DMI_SYS_VENDOR, "HP"), 1479 DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"), 1480 }, 1481 }, 1482 { 1483 .ident = "Acer Chromebook R11 (Cyan)", 1484 .matches = { 1485 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1486 DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"), 1487 }, 1488 }, 1489 { 1490 .ident = "Samsung Chromebook 3 (Celes)", 1491 .matches = { 1492 DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), 1493 DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), 1494 }, 1495 }, 1496 {} 1497 }; 1498 chv_init_irq_valid_mask(struct gpio_chip * chip,unsigned long * valid_mask,unsigned int ngpios)1499 static void chv_init_irq_valid_mask(struct gpio_chip *chip, 1500 unsigned long *valid_mask, 1501 unsigned int ngpios) 1502 { 1503 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1504 const struct intel_community *community = &pctrl->communities[0]; 1505 int i; 1506 1507 /* Do not add GPIOs that can only generate GPEs to the IRQ domain */ 1508 for (i = 0; i < pctrl->soc->npins; i++) { 1509 const struct pinctrl_pin_desc *desc; 1510 u32 intsel; 1511 1512 desc = &pctrl->soc->pins[i]; 1513 1514 intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1515 intsel &= CHV_PADCTRL0_INTSEL_MASK; 1516 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; 1517 1518 if (intsel >= community->nirqs) 1519 clear_bit(desc->number, valid_mask); 1520 } 1521 } 1522 chv_gpio_irq_init_hw(struct gpio_chip * chip)1523 static int chv_gpio_irq_init_hw(struct gpio_chip *chip) 1524 { 1525 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1526 const struct intel_community *community = &pctrl->communities[0]; 1527 1528 /* 1529 * The same set of machines in chv_no_valid_mask[] have incorrectly 1530 * configured GPIOs that generate spurious interrupts so we use 1531 * this same list to apply another quirk for them. 1532 * 1533 * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953. 1534 */ 1535 if (!pctrl->chip.irq.init_valid_mask) { 1536 /* 1537 * Mask all interrupts the community is able to generate 1538 * but leave the ones that can only generate GPEs unmasked. 1539 */ 1540 chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs)); 1541 } 1542 1543 /* Clear all interrupts */ 1544 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); 1545 1546 return 0; 1547 } 1548 chv_gpio_add_pin_ranges(struct gpio_chip * chip)1549 static int chv_gpio_add_pin_ranges(struct gpio_chip *chip) 1550 { 1551 struct intel_pinctrl *pctrl = gpiochip_get_data(chip); 1552 struct device *dev = pctrl->dev; 1553 const struct intel_community *community = &pctrl->communities[0]; 1554 const struct intel_padgroup *gpp; 1555 int ret, i; 1556 1557 for (i = 0; i < community->ngpps; i++) { 1558 gpp = &community->gpps[i]; 1559 ret = gpiochip_add_pin_range(chip, dev_name(dev), gpp->base, gpp->base, gpp->size); 1560 if (ret) { 1561 dev_err(dev, "failed to add GPIO pin range\n"); 1562 return ret; 1563 } 1564 } 1565 1566 return 0; 1567 } 1568 chv_gpio_probe(struct intel_pinctrl * pctrl,int irq)1569 static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq) 1570 { 1571 const struct intel_community *community = &pctrl->communities[0]; 1572 const struct intel_padgroup *gpp; 1573 struct gpio_chip *chip = &pctrl->chip; 1574 struct device *dev = pctrl->dev; 1575 bool need_valid_mask = !dmi_check_system(chv_no_valid_mask); 1576 int ret, i, irq_base; 1577 1578 *chip = chv_gpio_chip; 1579 1580 chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1; 1581 chip->label = dev_name(dev); 1582 chip->add_pin_ranges = chv_gpio_add_pin_ranges; 1583 chip->parent = dev; 1584 chip->base = -1; 1585 1586 pctrl->irq = irq; 1587 1588 gpio_irq_chip_set_chip(&chip->irq, &chv_gpio_irq_chip); 1589 chip->irq.init_hw = chv_gpio_irq_init_hw; 1590 chip->irq.parent_handler = chv_gpio_irq_handler; 1591 chip->irq.num_parents = 1; 1592 chip->irq.parents = &pctrl->irq; 1593 chip->irq.default_type = IRQ_TYPE_NONE; 1594 chip->irq.handler = handle_bad_irq; 1595 if (need_valid_mask) { 1596 chip->irq.init_valid_mask = chv_init_irq_valid_mask; 1597 } else { 1598 irq_base = devm_irq_alloc_descs(dev, -1, 0, pctrl->soc->npins, NUMA_NO_NODE); 1599 if (irq_base < 0) { 1600 dev_err(dev, "Failed to allocate IRQ numbers\n"); 1601 return irq_base; 1602 } 1603 } 1604 1605 ret = devm_gpiochip_add_data(dev, chip, pctrl); 1606 if (ret) { 1607 dev_err(dev, "Failed to register gpiochip\n"); 1608 return ret; 1609 } 1610 1611 if (!need_valid_mask) { 1612 for (i = 0; i < community->ngpps; i++) { 1613 gpp = &community->gpps[i]; 1614 1615 irq_domain_associate_many(chip->irq.domain, irq_base, 1616 gpp->base, gpp->size); 1617 irq_base += gpp->size; 1618 } 1619 } 1620 1621 return 0; 1622 } 1623 chv_pinctrl_mmio_access_handler(u32 function,acpi_physical_address address,u32 bits,u64 * value,void * handler_context,void * region_context)1624 static acpi_status chv_pinctrl_mmio_access_handler(u32 function, 1625 acpi_physical_address address, u32 bits, u64 *value, 1626 void *handler_context, void *region_context) 1627 { 1628 struct intel_pinctrl *pctrl = region_context; 1629 unsigned long flags; 1630 acpi_status ret = AE_OK; 1631 1632 raw_spin_lock_irqsave(&chv_lock, flags); 1633 1634 if (function == ACPI_WRITE) 1635 chv_pctrl_writel(pctrl, address, *value); 1636 else if (function == ACPI_READ) 1637 *value = chv_pctrl_readl(pctrl, address); 1638 else 1639 ret = AE_BAD_PARAMETER; 1640 1641 raw_spin_unlock_irqrestore(&chv_lock, flags); 1642 1643 return ret; 1644 } 1645 chv_pinctrl_probe(struct platform_device * pdev)1646 static int chv_pinctrl_probe(struct platform_device *pdev) 1647 { 1648 const struct intel_pinctrl_soc_data *soc_data; 1649 struct intel_community_context *cctx; 1650 struct intel_community *community; 1651 struct device *dev = &pdev->dev; 1652 struct intel_pinctrl *pctrl; 1653 acpi_status status; 1654 unsigned int i; 1655 int ret, irq; 1656 1657 soc_data = intel_pinctrl_get_soc_data(pdev); 1658 if (IS_ERR(soc_data)) 1659 return PTR_ERR(soc_data); 1660 1661 pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); 1662 if (!pctrl) 1663 return -ENOMEM; 1664 1665 pctrl->dev = dev; 1666 pctrl->soc = soc_data; 1667 1668 pctrl->ncommunities = pctrl->soc->ncommunities; 1669 pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities, 1670 pctrl->ncommunities * sizeof(*pctrl->communities), 1671 GFP_KERNEL); 1672 if (!pctrl->communities) 1673 return -ENOMEM; 1674 1675 community = &pctrl->communities[0]; 1676 community->regs = devm_platform_ioremap_resource(pdev, 0); 1677 if (IS_ERR(community->regs)) 1678 return PTR_ERR(community->regs); 1679 1680 community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF; 1681 1682 #ifdef CONFIG_PM_SLEEP 1683 pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins, 1684 sizeof(*pctrl->context.pads), 1685 GFP_KERNEL); 1686 if (!pctrl->context.pads) 1687 return -ENOMEM; 1688 #endif 1689 1690 pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities, 1691 sizeof(*pctrl->context.communities), 1692 GFP_KERNEL); 1693 if (!pctrl->context.communities) 1694 return -ENOMEM; 1695 1696 cctx = &pctrl->context.communities[0]; 1697 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) 1698 cctx->intr_lines[i] = CHV_INVALID_HWIRQ; 1699 1700 irq = platform_get_irq(pdev, 0); 1701 if (irq < 0) 1702 return irq; 1703 1704 pctrl->pctldesc = chv_pinctrl_desc; 1705 pctrl->pctldesc.name = dev_name(dev); 1706 pctrl->pctldesc.pins = pctrl->soc->pins; 1707 pctrl->pctldesc.npins = pctrl->soc->npins; 1708 1709 pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl); 1710 if (IS_ERR(pctrl->pctldev)) { 1711 dev_err(dev, "failed to register pinctrl driver\n"); 1712 return PTR_ERR(pctrl->pctldev); 1713 } 1714 1715 ret = chv_gpio_probe(pctrl, irq); 1716 if (ret) 1717 return ret; 1718 1719 status = acpi_install_address_space_handler(ACPI_HANDLE(dev), 1720 community->acpi_space_id, 1721 chv_pinctrl_mmio_access_handler, 1722 NULL, pctrl); 1723 if (ACPI_FAILURE(status)) 1724 dev_err(dev, "failed to install ACPI addr space handler\n"); 1725 1726 platform_set_drvdata(pdev, pctrl); 1727 1728 return 0; 1729 } 1730 chv_pinctrl_remove(struct platform_device * pdev)1731 static int chv_pinctrl_remove(struct platform_device *pdev) 1732 { 1733 struct intel_pinctrl *pctrl = platform_get_drvdata(pdev); 1734 const struct intel_community *community = &pctrl->communities[0]; 1735 1736 acpi_remove_address_space_handler(ACPI_HANDLE(&pdev->dev), 1737 community->acpi_space_id, 1738 chv_pinctrl_mmio_access_handler); 1739 1740 return 0; 1741 } 1742 chv_pinctrl_suspend_noirq(struct device * dev)1743 static int chv_pinctrl_suspend_noirq(struct device *dev) 1744 { 1745 struct intel_pinctrl *pctrl = dev_get_drvdata(dev); 1746 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1747 unsigned long flags; 1748 int i; 1749 1750 raw_spin_lock_irqsave(&chv_lock, flags); 1751 1752 cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK); 1753 1754 for (i = 0; i < pctrl->soc->npins; i++) { 1755 const struct pinctrl_pin_desc *desc; 1756 struct intel_pad_context *ctx = &pctrl->context.pads[i]; 1757 1758 desc = &pctrl->soc->pins[i]; 1759 if (chv_pad_locked(pctrl, desc->number)) 1760 continue; 1761 1762 ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1763 ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE; 1764 1765 ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1); 1766 } 1767 1768 raw_spin_unlock_irqrestore(&chv_lock, flags); 1769 1770 return 0; 1771 } 1772 chv_pinctrl_resume_noirq(struct device * dev)1773 static int chv_pinctrl_resume_noirq(struct device *dev) 1774 { 1775 struct intel_pinctrl *pctrl = dev_get_drvdata(dev); 1776 struct intel_community_context *cctx = &pctrl->context.communities[0]; 1777 unsigned long flags; 1778 int i; 1779 1780 raw_spin_lock_irqsave(&chv_lock, flags); 1781 1782 /* 1783 * Mask all interrupts before restoring per-pin configuration 1784 * registers because we don't know in which state BIOS left them 1785 * upon exiting suspend. 1786 */ 1787 chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000); 1788 1789 for (i = 0; i < pctrl->soc->npins; i++) { 1790 const struct pinctrl_pin_desc *desc; 1791 struct intel_pad_context *ctx = &pctrl->context.pads[i]; 1792 u32 val; 1793 1794 desc = &pctrl->soc->pins[i]; 1795 if (chv_pad_locked(pctrl, desc->number)) 1796 continue; 1797 1798 /* Only restore if our saved state differs from the current */ 1799 val = chv_readl(pctrl, desc->number, CHV_PADCTRL0); 1800 val &= ~CHV_PADCTRL0_GPIORXSTATE; 1801 if (ctx->padctrl0 != val) { 1802 chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0); 1803 dev_dbg(dev, "restored pin %2u ctrl0 0x%08x\n", desc->number, 1804 chv_readl(pctrl, desc->number, CHV_PADCTRL0)); 1805 } 1806 1807 val = chv_readl(pctrl, desc->number, CHV_PADCTRL1); 1808 if (ctx->padctrl1 != val) { 1809 chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1); 1810 dev_dbg(dev, "restored pin %2u ctrl1 0x%08x\n", desc->number, 1811 chv_readl(pctrl, desc->number, CHV_PADCTRL1)); 1812 } 1813 } 1814 1815 /* 1816 * Now that all pins are restored to known state, we can restore 1817 * the interrupt mask register as well. 1818 */ 1819 chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); 1820 chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask); 1821 1822 raw_spin_unlock_irqrestore(&chv_lock, flags); 1823 1824 return 0; 1825 } 1826 1827 static DEFINE_NOIRQ_DEV_PM_OPS(chv_pinctrl_pm_ops, 1828 chv_pinctrl_suspend_noirq, chv_pinctrl_resume_noirq); 1829 1830 static const struct acpi_device_id chv_pinctrl_acpi_match[] = { 1831 { "INT33FF", (kernel_ulong_t)chv_soc_data }, 1832 { } 1833 }; 1834 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); 1835 1836 static struct platform_driver chv_pinctrl_driver = { 1837 .probe = chv_pinctrl_probe, 1838 .remove = chv_pinctrl_remove, 1839 .driver = { 1840 .name = "cherryview-pinctrl", 1841 .pm = pm_sleep_ptr(&chv_pinctrl_pm_ops), 1842 .acpi_match_table = chv_pinctrl_acpi_match, 1843 }, 1844 }; 1845 chv_pinctrl_init(void)1846 static int __init chv_pinctrl_init(void) 1847 { 1848 return platform_driver_register(&chv_pinctrl_driver); 1849 } 1850 subsys_initcall(chv_pinctrl_init); 1851 chv_pinctrl_exit(void)1852 static void __exit chv_pinctrl_exit(void) 1853 { 1854 platform_driver_unregister(&chv_pinctrl_driver); 1855 } 1856 module_exit(chv_pinctrl_exit); 1857 1858 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); 1859 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver"); 1860 MODULE_LICENSE("GPL v2"); 1861 MODULE_IMPORT_NS(PINCTRL_INTEL); 1862