drivers/pinctrl/intel/pinctrl-cherryview.c

   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       ((unsigned int)INVALID_HWIRQ)
  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
 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
 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
 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
 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
 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 */
 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
 620 static int chv_get_groups_count(struct pinctrl_dev *pctldev)
 621 {
 622         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 623
 624         return pctrl->soc->ngroups;
 625 }
 626
 627 static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
 628                                       unsigned int group)
 629 {
 630         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 631
 632         return pctrl->soc->groups[group].grp.name;
 633 }
 634
 635 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
 636                               const unsigned int **pins, unsigned int *npins)
 637 {
 638         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 639
 640         *pins = pctrl->soc->groups[group].grp.pins;
 641         *npins = pctrl->soc->groups[group].grp.npins;
 642         return 0;
 643 }
 644
 645 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 646                              unsigned int offset)
 647 {
 648         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 649         unsigned long flags;
 650         u32 ctrl0, ctrl1;
 651         bool locked;
 652
 653         raw_spin_lock_irqsave(&chv_lock, flags);
 654
 655         ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
 656         ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1);
 657         locked = chv_pad_locked(pctrl, offset);
 658
 659         raw_spin_unlock_irqrestore(&chv_lock, flags);
 660
 661         if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
 662                 seq_puts(s, "GPIO ");
 663         } else {
 664                 u32 mode;
 665
 666                 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
 667                 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
 668
 669                 seq_printf(s, "mode %d ", mode);
 670         }
 671
 672         seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
 673
 674         if (locked)
 675                 seq_puts(s, " [LOCKED]");
 676 }
 677
 678 static const struct pinctrl_ops chv_pinctrl_ops = {
 679         .get_groups_count = chv_get_groups_count,
 680         .get_group_name = chv_get_group_name,
 681         .get_group_pins = chv_get_group_pins,
 682         .pin_dbg_show = chv_pin_dbg_show,
 683 };
 684
 685 static int chv_get_functions_count(struct pinctrl_dev *pctldev)
 686 {
 687         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 688
 689         return pctrl->soc->nfunctions;
 690 }
 691
 692 static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
 693                                          unsigned int function)
 694 {
 695         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 696
 697         return pctrl->soc->functions[function].func.name;
 698 }
 699
 700 static int chv_get_function_groups(struct pinctrl_dev *pctldev,
 701                                    unsigned int function,
 702                                    const char * const **groups,
 703                                    unsigned int * const ngroups)
 704 {
 705         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 706
 707         *groups = pctrl->soc->functions[function].func.groups;
 708         *ngroups = pctrl->soc->functions[function].func.ngroups;
 709         return 0;
 710 }
 711
 712 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
 713                               unsigned int function, unsigned int group)
 714 {
 715         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 716         struct device *dev = pctrl->dev;
 717         const struct intel_pingroup *grp;
 718         unsigned long flags;
 719         int i;
 720
 721         grp = &pctrl->soc->groups[group];
 722
 723         raw_spin_lock_irqsave(&chv_lock, flags);
 724
 725         /* Check first that the pad is not locked */
 726         for (i = 0; i < grp->grp.npins; i++) {
 727                 if (chv_pad_locked(pctrl, grp->grp.pins[i])) {
 728                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 729                         dev_warn(dev, "unable to set mode for locked pin %u\n", grp->grp.pins[i]);
 730                         return -EBUSY;
 731                 }
 732         }
 733
 734         for (i = 0; i < grp->grp.npins; i++) {
 735                 int pin = grp->grp.pins[i];
 736                 unsigned int mode;
 737                 bool invert_oe;
 738                 u32 value;
 739
 740                 /* Check if there is pin-specific config */
 741                 if (grp->modes)
 742                         mode = grp->modes[i];
 743                 else
 744                         mode = grp->mode;
 745
 746                 /* Extract OE inversion */
 747                 invert_oe = mode & PINMODE_INVERT_OE;
 748                 mode &= ~PINMODE_INVERT_OE;
 749
 750                 value = chv_readl(pctrl, pin, CHV_PADCTRL0);
 751                 /* Disable GPIO mode */
 752                 value &= ~CHV_PADCTRL0_GPIOEN;
 753                 /* Set to desired mode */
 754                 value &= ~CHV_PADCTRL0_PMODE_MASK;
 755                 value |= mode << CHV_PADCTRL0_PMODE_SHIFT;
 756                 chv_writel(pctrl, pin, CHV_PADCTRL0, value);
 757
 758                 /* Update for invert_oe */
 759                 value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK;
 760                 if (invert_oe)
 761                         value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
 762                 chv_writel(pctrl, pin, CHV_PADCTRL1, value);
 763
 764                 dev_dbg(dev, "configured pin %u mode %u OE %sinverted\n", pin, mode,
 765                         invert_oe ? "" : "not ");
 766         }
 767
 768         raw_spin_unlock_irqrestore(&chv_lock, flags);
 769
 770         return 0;
 771 }
 772
 773 static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl,
 774                                       unsigned int offset)
 775 {
 776         u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK;
 777         u32 value;
 778
 779         /*
 780          * One some devices the GPIO should output the inverted value from what
 781          * device-drivers / ACPI code expects (inverted external buffer?). The
 782          * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag,
 783          * preserve this flag if the pin is already setup as GPIO.
 784          */
 785         value = chv_readl(pctrl, offset, CHV_PADCTRL0);
 786         if (value & CHV_PADCTRL0_GPIOEN)
 787                 invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA;
 788
 789         value = chv_readl(pctrl, offset, CHV_PADCTRL1);
 790         value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
 791         value &= ~invrxtx_mask;
 792         chv_writel(pctrl, offset, CHV_PADCTRL1, value);
 793 }
 794
 795 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
 796                                    struct pinctrl_gpio_range *range,
 797                                    unsigned int offset)
 798 {
 799         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 800         unsigned long flags;
 801         u32 value;
 802
 803         raw_spin_lock_irqsave(&chv_lock, flags);
 804
 805         if (chv_pad_locked(pctrl, offset)) {
 806                 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
 807                 if (!(value & CHV_PADCTRL0_GPIOEN)) {
 808                         /* Locked so cannot enable */
 809                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 810                         return -EBUSY;
 811                 }
 812         } else {
 813                 struct intel_community_context *cctx = &pctrl->context.communities[0];
 814                 int i;
 815
 816                 /* Reset the interrupt mapping */
 817                 for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) {
 818                         if (cctx->intr_lines[i] == offset) {
 819                                 cctx->intr_lines[i] = CHV_INVALID_HWIRQ;
 820                                 break;
 821                         }
 822                 }
 823
 824                 /* Disable interrupt generation */
 825                 chv_gpio_clear_triggering(pctrl, offset);
 826
 827                 value = chv_readl(pctrl, offset, CHV_PADCTRL0);
 828
 829                 /*
 830                  * If the pin is in HiZ mode (both TX and RX buffers are
 831                  * disabled) we turn it to be input now.
 832                  */
 833                 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
 834                      (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
 835                         value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
 836                         value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
 837                 }
 838
 839                 /* Switch to a GPIO mode */
 840                 value |= CHV_PADCTRL0_GPIOEN;
 841                 chv_writel(pctrl, offset, CHV_PADCTRL0, value);
 842         }
 843
 844         raw_spin_unlock_irqrestore(&chv_lock, flags);
 845
 846         return 0;
 847 }
 848
 849 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
 850                                   struct pinctrl_gpio_range *range,
 851                                   unsigned int offset)
 852 {
 853         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 854         unsigned long flags;
 855
 856         raw_spin_lock_irqsave(&chv_lock, flags);
 857
 858         if (!chv_pad_locked(pctrl, offset))
 859                 chv_gpio_clear_triggering(pctrl, offset);
 860
 861         raw_spin_unlock_irqrestore(&chv_lock, flags);
 862 }
 863
 864 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
 865                                   struct pinctrl_gpio_range *range,
 866                                   unsigned int offset, bool input)
 867 {
 868         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 869         unsigned long flags;
 870         u32 ctrl0;
 871
 872         raw_spin_lock_irqsave(&chv_lock, flags);
 873
 874         ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK;
 875         if (input)
 876                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
 877         else
 878                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
 879         chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
 880
 881         raw_spin_unlock_irqrestore(&chv_lock, flags);
 882
 883         return 0;
 884 }
 885
 886 static const struct pinmux_ops chv_pinmux_ops = {
 887         .get_functions_count = chv_get_functions_count,
 888         .get_function_name = chv_get_function_name,
 889         .get_function_groups = chv_get_function_groups,
 890         .set_mux = chv_pinmux_set_mux,
 891         .gpio_request_enable = chv_gpio_request_enable,
 892         .gpio_disable_free = chv_gpio_disable_free,
 893         .gpio_set_direction = chv_gpio_set_direction,
 894 };
 895
 896 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
 897                           unsigned long *config)
 898 {
 899         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 900         enum pin_config_param param = pinconf_to_config_param(*config);
 901         unsigned long flags;
 902         u32 ctrl0, ctrl1;
 903         u16 arg = 0;
 904         u32 term;
 905
 906         raw_spin_lock_irqsave(&chv_lock, flags);
 907         ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
 908         ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
 909         raw_spin_unlock_irqrestore(&chv_lock, flags);
 910
 911         term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
 912
 913         switch (param) {
 914         case PIN_CONFIG_BIAS_DISABLE:
 915                 if (term)
 916                         return -EINVAL;
 917                 break;
 918
 919         case PIN_CONFIG_BIAS_PULL_UP:
 920                 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
 921                         return -EINVAL;
 922
 923                 switch (term) {
 924                 case CHV_PADCTRL0_TERM_20K:
 925                         arg = 20000;
 926                         break;
 927                 case CHV_PADCTRL0_TERM_5K:
 928                         arg = 5000;
 929                         break;
 930                 case CHV_PADCTRL0_TERM_1K:
 931                         arg = 1000;
 932                         break;
 933                 }
 934
 935                 break;
 936
 937         case PIN_CONFIG_BIAS_PULL_DOWN:
 938                 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
 939                         return -EINVAL;
 940
 941                 switch (term) {
 942                 case CHV_PADCTRL0_TERM_20K:
 943                         arg = 20000;
 944                         break;
 945                 case CHV_PADCTRL0_TERM_5K:
 946                         arg = 5000;
 947                         break;
 948                 }
 949
 950                 break;
 951
 952         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
 953                 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
 954                         return -EINVAL;
 955                 break;
 956
 957         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
 958                 u32 cfg;
 959
 960                 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
 961                 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
 962                 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
 963                         return -EINVAL;
 964
 965                 break;
 966         }
 967
 968         default:
 969                 return -ENOTSUPP;
 970         }
 971
 972         *config = pinconf_to_config_packed(param, arg);
 973         return 0;
 974 }
 975
 976 static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin,
 977                                enum pin_config_param param, u32 arg)
 978 {
 979         unsigned long flags;
 980         u32 ctrl0, pull;
 981
 982         raw_spin_lock_irqsave(&chv_lock, flags);
 983         ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0);
 984
 985         switch (param) {
 986         case PIN_CONFIG_BIAS_DISABLE:
 987                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
 988                 break;
 989
 990         case PIN_CONFIG_BIAS_PULL_UP:
 991                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
 992
 993                 switch (arg) {
 994                 case 1000:
 995                         /* For 1k there is only pull up */
 996                         pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
 997                         break;
 998                 case 5000:
 999                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1000                         break;
1001                 case 20000:
1002                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1003                         break;
1004                 default:
1005                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1006                         return -EINVAL;
1007                 }
1008
1009                 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1010                 break;
1011
1012         case PIN_CONFIG_BIAS_PULL_DOWN:
1013                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1014
1015                 switch (arg) {
1016                 case 5000:
1017                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1018                         break;
1019                 case 20000:
1020                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1021                         break;
1022                 default:
1023                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1024                         return -EINVAL;
1025                 }
1026
1027                 ctrl0 |= pull;
1028                 break;
1029
1030         default:
1031                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1032                 return -EINVAL;
1033         }
1034
1035         chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0);
1036         raw_spin_unlock_irqrestore(&chv_lock, flags);
1037
1038         return 0;
1039 }
1040
1041 static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin,
1042                                bool enable)
1043 {
1044         unsigned long flags;
1045         u32 ctrl1;
1046
1047         raw_spin_lock_irqsave(&chv_lock, flags);
1048         ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1);
1049
1050         if (enable)
1051                 ctrl1 |= CHV_PADCTRL1_ODEN;
1052         else
1053                 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1054
1055         chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1);
1056         raw_spin_unlock_irqrestore(&chv_lock, flags);
1057
1058         return 0;
1059 }
1060
1061 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
1062                           unsigned long *configs, unsigned int nconfigs)
1063 {
1064         struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1065         struct device *dev = pctrl->dev;
1066         enum pin_config_param param;
1067         int i, ret;
1068         u32 arg;
1069
1070         if (chv_pad_locked(pctrl, pin))
1071                 return -EBUSY;
1072
1073         for (i = 0; i < nconfigs; i++) {
1074                 param = pinconf_to_config_param(configs[i]);
1075                 arg = pinconf_to_config_argument(configs[i]);
1076
1077                 switch (param) {
1078                 case PIN_CONFIG_BIAS_DISABLE:
1079                 case PIN_CONFIG_BIAS_PULL_UP:
1080                 case PIN_CONFIG_BIAS_PULL_DOWN:
1081                         ret = chv_config_set_pull(pctrl, pin, param, arg);
1082                         if (ret)
1083                                 return ret;
1084                         break;
1085
1086                 case PIN_CONFIG_DRIVE_PUSH_PULL:
1087                         ret = chv_config_set_oden(pctrl, pin, false);
1088                         if (ret)
1089                                 return ret;
1090                         break;
1091
1092                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1093                         ret = chv_config_set_oden(pctrl, pin, true);
1094                         if (ret)
1095                                 return ret;
1096                         break;
1097
1098                 default:
1099                         return -ENOTSUPP;
1100                 }
1101
1102                 dev_dbg(dev, "pin %d set config %d arg %u\n", pin, param, arg);
1103         }
1104
1105         return 0;
1106 }
1107
1108 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1109                                 unsigned int group,
1110                                 unsigned long *config)
1111 {
1112         const unsigned int *pins;
1113         unsigned int npins;
1114         int ret;
1115
1116         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1117         if (ret)
1118                 return ret;
1119
1120         ret = chv_config_get(pctldev, pins[0], config);
1121         if (ret)
1122                 return ret;
1123
1124         return 0;
1125 }
1126
1127 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1128                                 unsigned int group, unsigned long *configs,
1129                                 unsigned int num_configs)
1130 {
1131         const unsigned int *pins;
1132         unsigned int npins;
1133         int i, ret;
1134
1135         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1136         if (ret)
1137                 return ret;
1138
1139         for (i = 0; i < npins; i++) {
1140                 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1141                 if (ret)
1142                         return ret;
1143         }
1144
1145         return 0;
1146 }
1147
1148 static const struct pinconf_ops chv_pinconf_ops = {
1149         .is_generic = true,
1150         .pin_config_set = chv_config_set,
1151         .pin_config_get = chv_config_get,
1152         .pin_config_group_get = chv_config_group_get,
1153         .pin_config_group_set = chv_config_group_set,
1154 };
1155
1156 static struct pinctrl_desc chv_pinctrl_desc = {
1157         .pctlops = &chv_pinctrl_ops,
1158         .pmxops = &chv_pinmux_ops,
1159         .confops = &chv_pinconf_ops,
1160         .owner = THIS_MODULE,
1161 };
1162
1163 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset)
1164 {
1165         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1166         unsigned long flags;
1167         u32 ctrl0, cfg;
1168
1169         raw_spin_lock_irqsave(&chv_lock, flags);
1170         ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1171         raw_spin_unlock_irqrestore(&chv_lock, flags);
1172
1173         cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1174         cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1175
1176         if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1177                 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1178         return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1179 }
1180
1181 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
1182 {
1183         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1184         unsigned long flags;
1185         u32 ctrl0;
1186
1187         raw_spin_lock_irqsave(&chv_lock, flags);
1188
1189         ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1190
1191         if (value)
1192                 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1193         else
1194                 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1195
1196         chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0);
1197
1198         raw_spin_unlock_irqrestore(&chv_lock, flags);
1199 }
1200
1201 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1202 {
1203         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1204         u32 ctrl0, direction;
1205         unsigned long flags;
1206
1207         raw_spin_lock_irqsave(&chv_lock, flags);
1208         ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0);
1209         raw_spin_unlock_irqrestore(&chv_lock, flags);
1210
1211         direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1212         direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1213
1214         if (direction == CHV_PADCTRL0_GPIOCFG_GPO)
1215                 return GPIO_LINE_DIRECTION_OUT;
1216
1217         return GPIO_LINE_DIRECTION_IN;
1218 }
1219
1220 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1221 {
1222         return pinctrl_gpio_direction_input(chip->base + offset);
1223 }
1224
1225 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
1226                                      int value)
1227 {
1228         chv_gpio_set(chip, offset, value);
1229         return pinctrl_gpio_direction_output(chip->base + offset);
1230 }
1231
1232 static const struct gpio_chip chv_gpio_chip = {
1233         .owner = THIS_MODULE,
1234         .request = gpiochip_generic_request,
1235         .free = gpiochip_generic_free,
1236         .get_direction = chv_gpio_get_direction,
1237         .direction_input = chv_gpio_direction_input,
1238         .direction_output = chv_gpio_direction_output,
1239         .get = chv_gpio_get,
1240         .set = chv_gpio_set,
1241 };
1242
1243 static void chv_gpio_irq_ack(struct irq_data *d)
1244 {
1245         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1246         struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1247         irq_hw_number_t hwirq = irqd_to_hwirq(d);
1248         u32 intr_line;
1249
1250         raw_spin_lock(&chv_lock);
1251
1252         intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
1253         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1254         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1255         chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line));
1256
1257         raw_spin_unlock(&chv_lock);
1258 }
1259
1260 static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask)
1261 {
1262         struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
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, hwirq, 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         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1285         irq_hw_number_t hwirq = irqd_to_hwirq(d);
1286
1287         chv_gpio_irq_mask_unmask(gc, hwirq, true);
1288         gpiochip_disable_irq(gc, hwirq);
1289 }
1290
1291 static void chv_gpio_irq_unmask(struct irq_data *d)
1292 {
1293         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1294         irq_hw_number_t hwirq = irqd_to_hwirq(d);
1295
1296         gpiochip_enable_irq(gc, hwirq);
1297         chv_gpio_irq_mask_unmask(gc, hwirq, false);
1298 }
1299
1300 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1301 {
1302         /*
1303          * Check if the interrupt has been requested with 0 as triggering
1304          * type. In that case it is assumed that the current values
1305          * programmed to the hardware are used (e.g BIOS configured
1306          * defaults).
1307          *
1308          * In that case ->irq_set_type() will never be called so we need to
1309          * read back the values from hardware now, set correct flow handler
1310          * and update mappings before the interrupt is being used.
1311          */
1312         if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1313                 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1314                 struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1315                 struct device *dev = pctrl->dev;
1316                 struct intel_community_context *cctx = &pctrl->context.communities[0];
1317                 irq_hw_number_t hwirq = irqd_to_hwirq(d);
1318                 irq_flow_handler_t handler;
1319                 unsigned long flags;
1320                 u32 intsel, value;
1321
1322                 raw_spin_lock_irqsave(&chv_lock, flags);
1323                 intsel = chv_readl(pctrl, hwirq, CHV_PADCTRL0);
1324                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1325                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1326
1327                 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1);
1328                 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1329                         handler = handle_level_irq;
1330                 else
1331                         handler = handle_edge_irq;
1332
1333                 if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) {
1334                         irq_set_handler_locked(d, handler);
1335                         dev_dbg(dev, "using interrupt line %u for IRQ_TYPE_NONE on pin %lu\n",
1336                                 intsel, hwirq);
1337                         cctx->intr_lines[intsel] = hwirq;
1338                 }
1339                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1340         }
1341
1342         chv_gpio_irq_unmask(d);
1343         return 0;
1344 }
1345
1346 static int chv_gpio_set_intr_line(struct intel_pinctrl *pctrl, unsigned int pin)
1347 {
1348         struct device *dev = pctrl->dev;
1349         struct intel_community_context *cctx = &pctrl->context.communities[0];
1350         const struct intel_community *community = &pctrl->communities[0];
1351         u32 value, intsel;
1352         int i;
1353
1354         value = chv_readl(pctrl, pin, CHV_PADCTRL0);
1355         intsel = (value & CHV_PADCTRL0_INTSEL_MASK) >> CHV_PADCTRL0_INTSEL_SHIFT;
1356
1357         if (cctx->intr_lines[intsel] == pin)
1358                 return 0;
1359
1360         if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) {
1361                 dev_dbg(dev, "using interrupt line %u for pin %u\n", intsel, pin);
1362                 cctx->intr_lines[intsel] = pin;
1363                 return 0;
1364         }
1365
1366         /*
1367          * The interrupt line selected by the BIOS is already in use by
1368          * another pin, this is a known BIOS bug found on several models.
1369          * But this may also be caused by Linux deciding to use a pin as
1370          * IRQ which was not expected to be used as such by the BIOS authors,
1371          * so log this at info level only.
1372          */
1373         dev_info(dev, "interrupt line %u is used by both pin %u and pin %u\n", intsel,
1374                  cctx->intr_lines[intsel], pin);
1375
1376         if (chv_pad_locked(pctrl, pin))
1377                 return -EBUSY;
1378
1379         /*
1380          * The BIOS fills the interrupt lines from 0 counting up, start at
1381          * the other end to find a free interrupt line to workaround this.
1382          */
1383         for (i = community->nirqs - 1; i >= 0; i--) {
1384                 if (cctx->intr_lines[i] == CHV_INVALID_HWIRQ)
1385                         break;
1386         }
1387         if (i < 0)
1388                 return -EBUSY;
1389
1390         dev_info(dev, "changing the interrupt line for pin %u to %d\n", pin, i);
1391
1392         value = (value & ~CHV_PADCTRL0_INTSEL_MASK) | (i << CHV_PADCTRL0_INTSEL_SHIFT);
1393         chv_writel(pctrl, pin, CHV_PADCTRL0, value);
1394         cctx->intr_lines[i] = pin;
1395
1396         return 0;
1397 }
1398
1399 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
1400 {
1401         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1402         struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1403         irq_hw_number_t hwirq = irqd_to_hwirq(d);
1404         unsigned long flags;
1405         u32 value;
1406         int ret;
1407
1408         raw_spin_lock_irqsave(&chv_lock, flags);
1409
1410         ret = chv_gpio_set_intr_line(pctrl, hwirq);
1411         if (ret)
1412                 goto out_unlock;
1413
1414         /*
1415          * Pins which can be used as shared interrupt are configured in
1416          * BIOS. Driver trusts BIOS configurations and assigns different
1417          * handler according to the irq type.
1418          *
1419          * Driver needs to save the mapping between each pin and
1420          * its interrupt line.
1421          * 1. If the pin cfg is locked in BIOS:
1422          *      Trust BIOS has programmed IntWakeCfg bits correctly,
1423          *      driver just needs to save the mapping.
1424          * 2. If the pin cfg is not locked in BIOS:
1425          *      Driver programs the IntWakeCfg bits and save the mapping.
1426          */
1427         if (!chv_pad_locked(pctrl, hwirq)) {
1428                 value = chv_readl(pctrl, hwirq, CHV_PADCTRL1);
1429                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1430                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1431
1432                 if (type & IRQ_TYPE_EDGE_BOTH) {
1433                         if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1434                                 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1435                         else if (type & IRQ_TYPE_EDGE_RISING)
1436                                 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1437                         else if (type & IRQ_TYPE_EDGE_FALLING)
1438                                 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1439                 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1440                         value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1441                         if (type & IRQ_TYPE_LEVEL_LOW)
1442                                 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1443                 }
1444
1445                 chv_writel(pctrl, hwirq, CHV_PADCTRL1, value);
1446         }
1447
1448         if (type & IRQ_TYPE_EDGE_BOTH)
1449                 irq_set_handler_locked(d, handle_edge_irq);
1450         else if (type & IRQ_TYPE_LEVEL_MASK)
1451                 irq_set_handler_locked(d, handle_level_irq);
1452
1453 out_unlock:
1454         raw_spin_unlock_irqrestore(&chv_lock, flags);
1455
1456         return ret;
1457 }
1458
1459 static const struct irq_chip chv_gpio_irq_chip = {
1460         .name           = "chv-gpio",
1461         .irq_startup    = chv_gpio_irq_startup,
1462         .irq_ack        = chv_gpio_irq_ack,
1463         .irq_mask       = chv_gpio_irq_mask,
1464         .irq_unmask     = chv_gpio_irq_unmask,
1465         .irq_set_type   = chv_gpio_irq_type,
1466         .flags          = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE,
1467         GPIOCHIP_IRQ_RESOURCE_HELPERS,
1468 };
1469
1470 static void chv_gpio_irq_handler(struct irq_desc *desc)
1471 {
1472         struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1473         struct intel_pinctrl *pctrl = gpiochip_get_data(gc);
1474         struct device *dev = pctrl->dev;
1475         const struct intel_community *community = &pctrl->communities[0];
1476         struct intel_community_context *cctx = &pctrl->context.communities[0];
1477         struct irq_chip *chip = irq_desc_get_chip(desc);
1478         unsigned long pending;
1479         unsigned long flags;
1480         u32 intr_line;
1481
1482         chained_irq_enter(chip, desc);
1483
1484         raw_spin_lock_irqsave(&chv_lock, flags);
1485         pending = chv_pctrl_readl(pctrl, CHV_INTSTAT);
1486         raw_spin_unlock_irqrestore(&chv_lock, flags);
1487
1488         for_each_set_bit(intr_line, &pending, community->nirqs) {
1489                 unsigned int offset;
1490
1491                 offset = cctx->intr_lines[intr_line];
1492                 if (offset == CHV_INVALID_HWIRQ) {
1493                         dev_warn_once(dev, "interrupt on unmapped interrupt line %u\n", intr_line);
1494                         /* Some boards expect hwirq 0 to trigger in this case */
1495                         offset = 0;
1496                 }
1497
1498                 generic_handle_domain_irq(gc->irq.domain, offset);
1499         }
1500
1501         chained_irq_exit(chip, desc);
1502 }
1503
1504 /*
1505  * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1506  * tables. Since we leave GPIOs that are not capable of generating
1507  * interrupts out of the irqdomain the numbering will be different and
1508  * cause devices using the hardcoded IRQ numbers fail. In order not to
1509  * break such machines we will only mask pins from irqdomain if the machine
1510  * is not listed below.
1511  */
1512 static const struct dmi_system_id chv_no_valid_mask[] = {
1513         /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1514         {
1515                 .ident = "Intel_Strago based Chromebooks (All models)",
1516                 .matches = {
1517                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1518                         DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1519                 },
1520         },
1521         {
1522                 .ident = "HP Chromebook 11 G5 (Setzer)",
1523                 .matches = {
1524                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1525                         DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1526                 },
1527         },
1528         {
1529                 .ident = "Acer Chromebook R11 (Cyan)",
1530                 .matches = {
1531                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1532                         DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1533                 },
1534         },
1535         {
1536                 .ident = "Samsung Chromebook 3 (Celes)",
1537                 .matches = {
1538                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1539                         DMI_MATCH(DMI_PRODUCT_NAME, "Celes"),
1540                 },
1541         },
1542         {}
1543 };
1544
1545 static void chv_init_irq_valid_mask(struct gpio_chip *chip,
1546                                     unsigned long *valid_mask,
1547                                     unsigned int ngpios)
1548 {
1549         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1550         const struct intel_community *community = &pctrl->communities[0];
1551         int i;
1552
1553         /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1554         for (i = 0; i < pctrl->soc->npins; i++) {
1555                 const struct pinctrl_pin_desc *desc;
1556                 u32 intsel;
1557
1558                 desc = &pctrl->soc->pins[i];
1559
1560                 intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1561                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1562                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1563
1564                 if (intsel >= community->nirqs)
1565                         clear_bit(desc->number, valid_mask);
1566         }
1567 }
1568
1569 static int chv_gpio_irq_init_hw(struct gpio_chip *chip)
1570 {
1571         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1572         const struct intel_community *community = &pctrl->communities[0];
1573
1574         /*
1575          * The same set of machines in chv_no_valid_mask[] have incorrectly
1576          * configured GPIOs that generate spurious interrupts so we use
1577          * this same list to apply another quirk for them.
1578          *
1579          * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1580          */
1581         if (!pctrl->chip.irq.init_valid_mask) {
1582                 /*
1583                  * Mask all interrupts the community is able to generate
1584                  * but leave the ones that can only generate GPEs unmasked.
1585                  */
1586                 chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs));
1587         }
1588
1589         /* Clear all interrupts */
1590         chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1591
1592         return 0;
1593 }
1594
1595 static int chv_gpio_add_pin_ranges(struct gpio_chip *chip)
1596 {
1597         struct intel_pinctrl *pctrl = gpiochip_get_data(chip);
1598         struct device *dev = pctrl->dev;
1599         const struct intel_community *community = &pctrl->communities[0];
1600         const struct intel_padgroup *gpp;
1601         int ret, i;
1602
1603         for (i = 0; i < community->ngpps; i++) {
1604                 gpp = &community->gpps[i];
1605                 ret = gpiochip_add_pin_range(chip, dev_name(dev), gpp->base, gpp->base, gpp->size);
1606                 if (ret) {
1607                         dev_err(dev, "failed to add GPIO pin range\n");
1608                         return ret;
1609                 }
1610         }
1611
1612         return 0;
1613 }
1614
1615 static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq)
1616 {
1617         const struct intel_community *community = &pctrl->communities[0];
1618         const struct intel_padgroup *gpp;
1619         struct gpio_chip *chip = &pctrl->chip;
1620         struct device *dev = pctrl->dev;
1621         bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1622         int ret, i, irq_base;
1623
1624         *chip = chv_gpio_chip;
1625
1626         chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1;
1627         chip->label = dev_name(dev);
1628         chip->add_pin_ranges = chv_gpio_add_pin_ranges;
1629         chip->parent = dev;
1630         chip->base = -1;
1631
1632         pctrl->irq = irq;
1633
1634         gpio_irq_chip_set_chip(&chip->irq, &chv_gpio_irq_chip);
1635         chip->irq.init_hw = chv_gpio_irq_init_hw;
1636         chip->irq.parent_handler = chv_gpio_irq_handler;
1637         chip->irq.num_parents = 1;
1638         chip->irq.parents = &pctrl->irq;
1639         chip->irq.default_type = IRQ_TYPE_NONE;
1640         chip->irq.handler = handle_bad_irq;
1641         if (need_valid_mask) {
1642                 chip->irq.init_valid_mask = chv_init_irq_valid_mask;
1643         } else {
1644                 irq_base = devm_irq_alloc_descs(dev, -1, 0, pctrl->soc->npins, NUMA_NO_NODE);
1645                 if (irq_base < 0) {
1646                         dev_err(dev, "Failed to allocate IRQ numbers\n");
1647                         return irq_base;
1648                 }
1649         }
1650
1651         ret = devm_gpiochip_add_data(dev, chip, pctrl);
1652         if (ret) {
1653                 dev_err(dev, "Failed to register gpiochip\n");
1654                 return ret;
1655         }
1656
1657         if (!need_valid_mask) {
1658                 for (i = 0; i < community->ngpps; i++) {
1659                         gpp = &community->gpps[i];
1660
1661                         irq_domain_associate_many(chip->irq.domain, irq_base,
1662                                                   gpp->base, gpp->size);
1663                         irq_base += gpp->size;
1664                 }
1665         }
1666
1667         return 0;
1668 }
1669
1670 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1671         acpi_physical_address address, u32 bits, u64 *value,
1672         void *handler_context, void *region_context)
1673 {
1674         struct intel_pinctrl *pctrl = region_context;
1675         unsigned long flags;
1676         acpi_status ret = AE_OK;
1677
1678         raw_spin_lock_irqsave(&chv_lock, flags);
1679
1680         if (function == ACPI_WRITE)
1681                 chv_pctrl_writel(pctrl, address, *value);
1682         else if (function == ACPI_READ)
1683                 *value = chv_pctrl_readl(pctrl, address);
1684         else
1685                 ret = AE_BAD_PARAMETER;
1686
1687         raw_spin_unlock_irqrestore(&chv_lock, flags);
1688
1689         return ret;
1690 }
1691
1692 static int chv_pinctrl_probe(struct platform_device *pdev)
1693 {
1694         const struct intel_pinctrl_soc_data *soc_data;
1695         struct intel_community_context *cctx;
1696         struct intel_community *community;
1697         struct device *dev = &pdev->dev;
1698         struct acpi_device *adev = ACPI_COMPANION(dev);
1699         struct intel_pinctrl *pctrl;
1700         acpi_status status;
1701         unsigned int i;
1702         int ret, irq;
1703
1704         soc_data = intel_pinctrl_get_soc_data(pdev);
1705         if (IS_ERR(soc_data))
1706                 return PTR_ERR(soc_data);
1707
1708         pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL);
1709         if (!pctrl)
1710                 return -ENOMEM;
1711
1712         pctrl->dev = dev;
1713         pctrl->soc = soc_data;
1714
1715         pctrl->ncommunities = pctrl->soc->ncommunities;
1716         pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities,
1717                                           pctrl->ncommunities * sizeof(*pctrl->communities),
1718                                           GFP_KERNEL);
1719         if (!pctrl->communities)
1720                 return -ENOMEM;
1721
1722         community = &pctrl->communities[0];
1723         community->regs = devm_platform_ioremap_resource(pdev, 0);
1724         if (IS_ERR(community->regs))
1725                 return PTR_ERR(community->regs);
1726
1727         community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF;
1728
1729 #ifdef CONFIG_PM_SLEEP
1730         pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins,
1731                                            sizeof(*pctrl->context.pads),
1732                                            GFP_KERNEL);
1733         if (!pctrl->context.pads)
1734                 return -ENOMEM;
1735 #endif
1736
1737         pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities,
1738                                                   sizeof(*pctrl->context.communities),
1739                                                   GFP_KERNEL);
1740         if (!pctrl->context.communities)
1741                 return -ENOMEM;
1742
1743         cctx = &pctrl->context.communities[0];
1744         for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++)
1745                 cctx->intr_lines[i] = CHV_INVALID_HWIRQ;
1746
1747         irq = platform_get_irq(pdev, 0);
1748         if (irq < 0)
1749                 return irq;
1750
1751         pctrl->pctldesc = chv_pinctrl_desc;
1752         pctrl->pctldesc.name = dev_name(dev);
1753         pctrl->pctldesc.pins = pctrl->soc->pins;
1754         pctrl->pctldesc.npins = pctrl->soc->npins;
1755
1756         pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl);
1757         if (IS_ERR(pctrl->pctldev)) {
1758                 dev_err(dev, "failed to register pinctrl driver\n");
1759                 return PTR_ERR(pctrl->pctldev);
1760         }
1761
1762         ret = chv_gpio_probe(pctrl, irq);
1763         if (ret)
1764                 return ret;
1765
1766         status = acpi_install_address_space_handler(adev->handle,
1767                                         community->acpi_space_id,
1768                                         chv_pinctrl_mmio_access_handler,
1769                                         NULL, pctrl);
1770         if (ACPI_FAILURE(status))
1771                 dev_err(dev, "failed to install ACPI addr space handler\n");
1772
1773         platform_set_drvdata(pdev, pctrl);
1774
1775         return 0;
1776 }
1777
1778 static int chv_pinctrl_remove(struct platform_device *pdev)
1779 {
1780         struct intel_pinctrl *pctrl = platform_get_drvdata(pdev);
1781         const struct intel_community *community = &pctrl->communities[0];
1782
1783         acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1784                                           community->acpi_space_id,
1785                                           chv_pinctrl_mmio_access_handler);
1786
1787         return 0;
1788 }
1789
1790 #ifdef CONFIG_PM_SLEEP
1791 static int chv_pinctrl_suspend_noirq(struct device *dev)
1792 {
1793         struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1794         struct intel_community_context *cctx = &pctrl->context.communities[0];
1795         unsigned long flags;
1796         int i;
1797
1798         raw_spin_lock_irqsave(&chv_lock, flags);
1799
1800         cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK);
1801
1802         for (i = 0; i < pctrl->soc->npins; i++) {
1803                 const struct pinctrl_pin_desc *desc;
1804                 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1805
1806                 desc = &pctrl->soc->pins[i];
1807                 if (chv_pad_locked(pctrl, desc->number))
1808                         continue;
1809
1810                 ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1811                 ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE;
1812
1813                 ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1814         }
1815
1816         raw_spin_unlock_irqrestore(&chv_lock, flags);
1817
1818         return 0;
1819 }
1820
1821 static int chv_pinctrl_resume_noirq(struct device *dev)
1822 {
1823         struct intel_pinctrl *pctrl = dev_get_drvdata(dev);
1824         struct intel_community_context *cctx = &pctrl->context.communities[0];
1825         unsigned long flags;
1826         int i;
1827
1828         raw_spin_lock_irqsave(&chv_lock, flags);
1829
1830         /*
1831          * Mask all interrupts before restoring per-pin configuration
1832          * registers because we don't know in which state BIOS left them
1833          * upon exiting suspend.
1834          */
1835         chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000);
1836
1837         for (i = 0; i < pctrl->soc->npins; i++) {
1838                 const struct pinctrl_pin_desc *desc;
1839                 struct intel_pad_context *ctx = &pctrl->context.pads[i];
1840                 u32 val;
1841
1842                 desc = &pctrl->soc->pins[i];
1843                 if (chv_pad_locked(pctrl, desc->number))
1844                         continue;
1845
1846                 /* Only restore if our saved state differs from the current */
1847                 val = chv_readl(pctrl, desc->number, CHV_PADCTRL0);
1848                 val &= ~CHV_PADCTRL0_GPIORXSTATE;
1849                 if (ctx->padctrl0 != val) {
1850                         chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0);
1851                         dev_dbg(dev, "restored pin %2u ctrl0 0x%08x\n", desc->number,
1852                                 chv_readl(pctrl, desc->number, CHV_PADCTRL0));
1853                 }
1854
1855                 val = chv_readl(pctrl, desc->number, CHV_PADCTRL1);
1856                 if (ctx->padctrl1 != val) {
1857                         chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1);
1858                         dev_dbg(dev, "restored pin %2u ctrl1 0x%08x\n", desc->number,
1859                                 chv_readl(pctrl, desc->number, CHV_PADCTRL1));
1860                 }
1861         }
1862
1863         /*
1864          * Now that all pins are restored to known state, we can restore
1865          * the interrupt mask register as well.
1866          */
1867         chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff);
1868         chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask);
1869
1870         raw_spin_unlock_irqrestore(&chv_lock, flags);
1871
1872         return 0;
1873 }
1874 #endif
1875
1876 static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1877         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1878                                       chv_pinctrl_resume_noirq)
1879 };
1880
1881 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1882         { "INT33FF", (kernel_ulong_t)chv_soc_data },
1883         { }
1884 };
1885 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1886
1887 static struct platform_driver chv_pinctrl_driver = {
1888         .probe = chv_pinctrl_probe,
1889         .remove = chv_pinctrl_remove,
1890         .driver = {
1891                 .name = "cherryview-pinctrl",
1892                 .pm = &chv_pinctrl_pm_ops,
1893                 .acpi_match_table = chv_pinctrl_acpi_match,
1894         },
1895 };
1896
1897 static int __init chv_pinctrl_init(void)
1898 {
1899         return platform_driver_register(&chv_pinctrl_driver);
1900 }
1901 subsys_initcall(chv_pinctrl_init);
1902
1903 static void __exit chv_pinctrl_exit(void)
1904 {
1905         platform_driver_unregister(&chv_pinctrl_driver);
1906 }
1907 module_exit(chv_pinctrl_exit);
1908
1909 MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>");
1910 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1911 MODULE_LICENSE("GPL v2");