drivers/pinctrl/intel/pinctrl-cherryview.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Cherryview/Braswell pinctrl driver
   4  *
   5  * Copyright (C) 2014, Intel Corporation
   6  * Author: Mika Westerberg <[email protected]>
   7  *
   8  * This driver is based on the original Cherryview GPIO driver by
   9  *   Ning Li <[email protected]>
  10  *   Alan Cox <[email protected]>
  11  */
  12
  13 #include <linux/acpi.h>
  14 #include <linux/dmi.h>
  15 #include <linux/gpio/driver.h>
  16 #include <linux/kernel.h>
  17 #include <linux/module.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/types.h>
  20
  21 #include <linux/pinctrl/pinctrl.h>
  22 #include <linux/pinctrl/pinmux.h>
  23 #include <linux/pinctrl/pinconf.h>
  24 #include <linux/pinctrl/pinconf-generic.h>
  25
  26 #include "pinctrl-intel.h"
  27
  28 #define CHV_INTSTAT                     0x300
  29 #define CHV_INTMASK                     0x380
  30
  31 #define FAMILY_PAD_REGS_OFF             0x4400
  32 #define FAMILY_PAD_REGS_SIZE            0x400
  33 #define MAX_FAMILY_PAD_GPIO_NO          15
  34 #define GPIO_REGS_SIZE                  8
  35
  36 #define CHV_PADCTRL0                    0x000
  37 #define CHV_PADCTRL0_INTSEL_SHIFT       28
  38 #define CHV_PADCTRL0_INTSEL_MASK        (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
  39 #define CHV_PADCTRL0_TERM_UP            BIT(23)
  40 #define CHV_PADCTRL0_TERM_SHIFT         20
  41 #define CHV_PADCTRL0_TERM_MASK          (7 << CHV_PADCTRL0_TERM_SHIFT)
  42 #define CHV_PADCTRL0_TERM_20K           1
  43 #define CHV_PADCTRL0_TERM_5K            2
  44 #define CHV_PADCTRL0_TERM_1K            4
  45 #define CHV_PADCTRL0_PMODE_SHIFT        16
  46 #define CHV_PADCTRL0_PMODE_MASK         (0xf << CHV_PADCTRL0_PMODE_SHIFT)
  47 #define CHV_PADCTRL0_GPIOEN             BIT(15)
  48 #define CHV_PADCTRL0_GPIOCFG_SHIFT      8
  49 #define CHV_PADCTRL0_GPIOCFG_MASK       (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
  50 #define CHV_PADCTRL0_GPIOCFG_GPIO       0
  51 #define CHV_PADCTRL0_GPIOCFG_GPO        1
  52 #define CHV_PADCTRL0_GPIOCFG_GPI        2
  53 #define CHV_PADCTRL0_GPIOCFG_HIZ        3
  54 #define CHV_PADCTRL0_GPIOTXSTATE        BIT(1)
  55 #define CHV_PADCTRL0_GPIORXSTATE        BIT(0)
  56
  57 #define CHV_PADCTRL1                    0x004
  58 #define CHV_PADCTRL1_CFGLOCK            BIT(31)
  59 #define CHV_PADCTRL1_INVRXTX_SHIFT      4
  60 #define CHV_PADCTRL1_INVRXTX_MASK       (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
  61 #define CHV_PADCTRL1_INVRXTX_TXENABLE   (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
  62 #define CHV_PADCTRL1_ODEN               BIT(3)
  63 #define CHV_PADCTRL1_INVRXTX_RXDATA     (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
  64 #define CHV_PADCTRL1_INTWAKECFG_MASK    7
  65 #define CHV_PADCTRL1_INTWAKECFG_FALLING 1
  66 #define CHV_PADCTRL1_INTWAKECFG_RISING  2
  67 #define CHV_PADCTRL1_INTWAKECFG_BOTH    3
  68 #define CHV_PADCTRL1_INTWAKECFG_LEVEL   4
  69
  70 /**
  71  * struct chv_alternate_function - A per group or per pin alternate function
  72  * @pin: Pin number (only used in per pin configs)
  73  * @mode: Mode the pin should be set in
  74  * @invert_oe: Invert OE for this pin
  75  */
  76 struct chv_alternate_function {
  77         unsigned int pin;
  78         u8 mode;
  79         bool invert_oe;
  80 };
  81
  82 /**
  83  * struct chv_pincgroup - describes a CHV pin group
  84  * @name: Name of the group
  85  * @pins: An array of pins in this group
  86  * @npins: Number of pins in this group
  87  * @altfunc: Alternate function applied to all pins in this group
  88  * @overrides: Alternate function override per pin or %NULL if not used
  89  * @noverrides: Number of per pin alternate function overrides if
  90  *              @overrides != NULL.
  91  */
  92 struct chv_pingroup {
  93         const char *name;
  94         const unsigned int *pins;
  95         size_t npins;
  96         struct chv_alternate_function altfunc;
  97         const struct chv_alternate_function *overrides;
  98         size_t noverrides;
  99 };
 100
 101 /**
 102  * struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
 103  * @base: Start pin number
 104  * @npins: Number of pins in this range
 105  */
 106 struct chv_gpio_pinrange {
 107         unsigned int base;
 108         unsigned int npins;
 109 };
 110
 111 /**
 112  * struct chv_community - A community specific configuration
 113  * @uid: ACPI _UID used to match the community
 114  * @pins: All pins in this community
 115  * @npins: Number of pins
 116  * @groups: All groups in this community
 117  * @ngroups: Number of groups
 118  * @functions: All functions in this community
 119  * @nfunctions: Number of functions
 120  * @gpio_ranges: An array of GPIO ranges in this community
 121  * @ngpio_ranges: Number of GPIO ranges
 122  * @nirqs: Total number of IRQs this community can generate
 123  * @acpi_space_id: An address space ID for ACPI OpRegion handler
 124  */
 125 struct chv_community {
 126         const char *uid;
 127         const struct pinctrl_pin_desc *pins;
 128         size_t npins;
 129         const struct chv_pingroup *groups;
 130         size_t ngroups;
 131         const struct intel_function *functions;
 132         size_t nfunctions;
 133         const struct chv_gpio_pinrange *gpio_ranges;
 134         size_t ngpio_ranges;
 135         size_t nirqs;
 136         acpi_adr_space_type acpi_space_id;
 137 };
 138
 139 struct chv_pin_context {
 140         u32 padctrl0;
 141         u32 padctrl1;
 142 };
 143
 144 /**
 145  * struct chv_pinctrl - CHV pinctrl private structure
 146  * @dev: Pointer to the parent device
 147  * @pctldesc: Pin controller description
 148  * @pctldev: Pointer to the pin controller device
 149  * @chip: GPIO chip in this pin controller
 150  * @regs: MMIO registers
 151  * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
 152  *              offset (in GPIO number space)
 153  * @community: Community this pinctrl instance represents
 154  * @saved_intmask: Interrupt mask saved for system sleep
 155  * @saved_pin_context: Pointer to a context of the pins saved for system sleep
 156  *
 157  * The first group in @groups is expected to contain all pins that can be
 158  * used as GPIOs.
 159  */
 160 struct chv_pinctrl {
 161         struct device *dev;
 162         struct pinctrl_desc pctldesc;
 163         struct pinctrl_dev *pctldev;
 164         struct gpio_chip chip;
 165         void __iomem *regs;
 166         unsigned intr_lines[16];
 167         const struct chv_community *community;
 168         u32 saved_intmask;
 169         struct chv_pin_context *saved_pin_context;
 170 };
 171
 172 #define ALTERNATE_FUNCTION(p, m, i)             \
 173         {                                       \
 174                 .pin = (p),                     \
 175                 .mode = (m),                    \
 176                 .invert_oe = (i),               \
 177         }
 178
 179 #define PIN_GROUP_WITH_ALT(n, p, m, i)          \
 180         {                                       \
 181                 .name = (n),                    \
 182                 .pins = (p),                    \
 183                 .npins = ARRAY_SIZE((p)),       \
 184                 .altfunc.mode = (m),            \
 185                 .altfunc.invert_oe = (i),       \
 186         }
 187
 188 #define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o)  \
 189         {                                       \
 190                 .name = (n),                    \
 191                 .pins = (p),                    \
 192                 .npins = ARRAY_SIZE((p)),       \
 193                 .altfunc.mode = (m),            \
 194                 .altfunc.invert_oe = (i),       \
 195                 .overrides = (o),               \
 196                 .noverrides = ARRAY_SIZE((o)),  \
 197         }
 198
 199 #define GPIO_PINRANGE(start, end)               \
 200         {                                       \
 201                 .base = (start),                \
 202                 .npins = (end) - (start) + 1,   \
 203         }
 204
 205 static const struct pinctrl_pin_desc southwest_pins[] = {
 206         PINCTRL_PIN(0, "FST_SPI_D2"),
 207         PINCTRL_PIN(1, "FST_SPI_D0"),
 208         PINCTRL_PIN(2, "FST_SPI_CLK"),
 209         PINCTRL_PIN(3, "FST_SPI_D3"),
 210         PINCTRL_PIN(4, "FST_SPI_CS1_B"),
 211         PINCTRL_PIN(5, "FST_SPI_D1"),
 212         PINCTRL_PIN(6, "FST_SPI_CS0_B"),
 213         PINCTRL_PIN(7, "FST_SPI_CS2_B"),
 214
 215         PINCTRL_PIN(15, "UART1_RTS_B"),
 216         PINCTRL_PIN(16, "UART1_RXD"),
 217         PINCTRL_PIN(17, "UART2_RXD"),
 218         PINCTRL_PIN(18, "UART1_CTS_B"),
 219         PINCTRL_PIN(19, "UART2_RTS_B"),
 220         PINCTRL_PIN(20, "UART1_TXD"),
 221         PINCTRL_PIN(21, "UART2_TXD"),
 222         PINCTRL_PIN(22, "UART2_CTS_B"),
 223
 224         PINCTRL_PIN(30, "MF_HDA_CLK"),
 225         PINCTRL_PIN(31, "MF_HDA_RSTB"),
 226         PINCTRL_PIN(32, "MF_HDA_SDIO"),
 227         PINCTRL_PIN(33, "MF_HDA_SDO"),
 228         PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
 229         PINCTRL_PIN(35, "MF_HDA_SYNC"),
 230         PINCTRL_PIN(36, "MF_HDA_SDI1"),
 231         PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
 232
 233         PINCTRL_PIN(45, "I2C5_SDA"),
 234         PINCTRL_PIN(46, "I2C4_SDA"),
 235         PINCTRL_PIN(47, "I2C6_SDA"),
 236         PINCTRL_PIN(48, "I2C5_SCL"),
 237         PINCTRL_PIN(49, "I2C_NFC_SDA"),
 238         PINCTRL_PIN(50, "I2C4_SCL"),
 239         PINCTRL_PIN(51, "I2C6_SCL"),
 240         PINCTRL_PIN(52, "I2C_NFC_SCL"),
 241
 242         PINCTRL_PIN(60, "I2C1_SDA"),
 243         PINCTRL_PIN(61, "I2C0_SDA"),
 244         PINCTRL_PIN(62, "I2C2_SDA"),
 245         PINCTRL_PIN(63, "I2C1_SCL"),
 246         PINCTRL_PIN(64, "I2C3_SDA"),
 247         PINCTRL_PIN(65, "I2C0_SCL"),
 248         PINCTRL_PIN(66, "I2C2_SCL"),
 249         PINCTRL_PIN(67, "I2C3_SCL"),
 250
 251         PINCTRL_PIN(75, "SATA_GP0"),
 252         PINCTRL_PIN(76, "SATA_GP1"),
 253         PINCTRL_PIN(77, "SATA_LEDN"),
 254         PINCTRL_PIN(78, "SATA_GP2"),
 255         PINCTRL_PIN(79, "MF_SMB_ALERTB"),
 256         PINCTRL_PIN(80, "SATA_GP3"),
 257         PINCTRL_PIN(81, "MF_SMB_CLK"),
 258         PINCTRL_PIN(82, "MF_SMB_DATA"),
 259
 260         PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
 261         PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
 262         PINCTRL_PIN(92, "GP_SSP_2_CLK"),
 263         PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
 264         PINCTRL_PIN(94, "GP_SSP_2_RXD"),
 265         PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
 266         PINCTRL_PIN(96, "GP_SSP_2_FS"),
 267         PINCTRL_PIN(97, "GP_SSP_2_TXD"),
 268 };
 269
 270 static const unsigned southwest_uart0_pins[] = { 16, 20 };
 271 static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
 272 static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
 273 static const unsigned southwest_i2c0_pins[] = { 61, 65 };
 274 static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
 275 static const unsigned southwest_lpe_pins[] = {
 276         30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
 277 };
 278 static const unsigned southwest_i2c1_pins[] = { 60, 63 };
 279 static const unsigned southwest_i2c2_pins[] = { 62, 66 };
 280 static const unsigned southwest_i2c3_pins[] = { 64, 67 };
 281 static const unsigned southwest_i2c4_pins[] = { 46, 50 };
 282 static const unsigned southwest_i2c5_pins[] = { 45, 48 };
 283 static const unsigned southwest_i2c6_pins[] = { 47, 51 };
 284 static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
 285 static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
 286
 287 /* LPE I2S TXD pins need to have invert_oe set */
 288 static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
 289         ALTERNATE_FUNCTION(30, 1, true),
 290         ALTERNATE_FUNCTION(34, 1, true),
 291         ALTERNATE_FUNCTION(97, 1, true),
 292 };
 293
 294 /*
 295  * Two spi3 chipselects are available in different mode than the main spi3
 296  * functionality, which is using mode 1.
 297  */
 298 static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
 299         ALTERNATE_FUNCTION(76, 3, false),
 300         ALTERNATE_FUNCTION(80, 3, false),
 301 };
 302
 303 static const struct chv_pingroup southwest_groups[] = {
 304         PIN_GROUP_WITH_ALT("uart0_grp", southwest_uart0_pins, 2, false),
 305         PIN_GROUP_WITH_ALT("uart1_grp", southwest_uart1_pins, 1, false),
 306         PIN_GROUP_WITH_ALT("uart2_grp", southwest_uart2_pins, 1, false),
 307         PIN_GROUP_WITH_ALT("hda_grp", southwest_hda_pins, 2, false),
 308         PIN_GROUP_WITH_ALT("i2c0_grp", southwest_i2c0_pins, 1, true),
 309         PIN_GROUP_WITH_ALT("i2c1_grp", southwest_i2c1_pins, 1, true),
 310         PIN_GROUP_WITH_ALT("i2c2_grp", southwest_i2c2_pins, 1, true),
 311         PIN_GROUP_WITH_ALT("i2c3_grp", southwest_i2c3_pins, 1, true),
 312         PIN_GROUP_WITH_ALT("i2c4_grp", southwest_i2c4_pins, 1, true),
 313         PIN_GROUP_WITH_ALT("i2c5_grp", southwest_i2c5_pins, 1, true),
 314         PIN_GROUP_WITH_ALT("i2c6_grp", southwest_i2c6_pins, 1, true),
 315         PIN_GROUP_WITH_ALT("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
 316
 317         PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
 318                                 southwest_lpe_altfuncs),
 319         PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
 320                                 southwest_spi3_altfuncs),
 321 };
 322
 323 static const char * const southwest_uart0_groups[] = { "uart0_grp" };
 324 static const char * const southwest_uart1_groups[] = { "uart1_grp" };
 325 static const char * const southwest_uart2_groups[] = { "uart2_grp" };
 326 static const char * const southwest_hda_groups[] = { "hda_grp" };
 327 static const char * const southwest_lpe_groups[] = { "lpe_grp" };
 328 static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
 329 static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
 330 static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
 331 static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
 332 static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
 333 static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
 334 static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
 335 static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
 336 static const char * const southwest_spi3_groups[] = { "spi3_grp" };
 337
 338 /*
 339  * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
 340  * enabled only as GPIOs.
 341  */
 342 static const struct intel_function southwest_functions[] = {
 343         FUNCTION("uart0", southwest_uart0_groups),
 344         FUNCTION("uart1", southwest_uart1_groups),
 345         FUNCTION("uart2", southwest_uart2_groups),
 346         FUNCTION("hda", southwest_hda_groups),
 347         FUNCTION("lpe", southwest_lpe_groups),
 348         FUNCTION("i2c0", southwest_i2c0_groups),
 349         FUNCTION("i2c1", southwest_i2c1_groups),
 350         FUNCTION("i2c2", southwest_i2c2_groups),
 351         FUNCTION("i2c3", southwest_i2c3_groups),
 352         FUNCTION("i2c4", southwest_i2c4_groups),
 353         FUNCTION("i2c5", southwest_i2c5_groups),
 354         FUNCTION("i2c6", southwest_i2c6_groups),
 355         FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
 356         FUNCTION("spi3", southwest_spi3_groups),
 357 };
 358
 359 static const struct chv_gpio_pinrange southwest_gpio_ranges[] = {
 360         GPIO_PINRANGE(0, 7),
 361         GPIO_PINRANGE(15, 22),
 362         GPIO_PINRANGE(30, 37),
 363         GPIO_PINRANGE(45, 52),
 364         GPIO_PINRANGE(60, 67),
 365         GPIO_PINRANGE(75, 82),
 366         GPIO_PINRANGE(90, 97),
 367 };
 368
 369 static const struct chv_community southwest_community = {
 370         .uid = "1",
 371         .pins = southwest_pins,
 372         .npins = ARRAY_SIZE(southwest_pins),
 373         .groups = southwest_groups,
 374         .ngroups = ARRAY_SIZE(southwest_groups),
 375         .functions = southwest_functions,
 376         .nfunctions = ARRAY_SIZE(southwest_functions),
 377         .gpio_ranges = southwest_gpio_ranges,
 378         .ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
 379         /*
 380          * Southwest community can benerate GPIO interrupts only for the
 381          * first 8 interrupts. The upper half (8-15) can only be used to
 382          * trigger GPEs.
 383          */
 384         .nirqs = 8,
 385         .acpi_space_id = 0x91,
 386 };
 387
 388 static const struct pinctrl_pin_desc north_pins[] = {
 389         PINCTRL_PIN(0, "GPIO_DFX_0"),
 390         PINCTRL_PIN(1, "GPIO_DFX_3"),
 391         PINCTRL_PIN(2, "GPIO_DFX_7"),
 392         PINCTRL_PIN(3, "GPIO_DFX_1"),
 393         PINCTRL_PIN(4, "GPIO_DFX_5"),
 394         PINCTRL_PIN(5, "GPIO_DFX_4"),
 395         PINCTRL_PIN(6, "GPIO_DFX_8"),
 396         PINCTRL_PIN(7, "GPIO_DFX_2"),
 397         PINCTRL_PIN(8, "GPIO_DFX_6"),
 398
 399         PINCTRL_PIN(15, "GPIO_SUS0"),
 400         PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
 401         PINCTRL_PIN(17, "GPIO_SUS3"),
 402         PINCTRL_PIN(18, "GPIO_SUS7"),
 403         PINCTRL_PIN(19, "GPIO_SUS1"),
 404         PINCTRL_PIN(20, "GPIO_SUS5"),
 405         PINCTRL_PIN(21, "SEC_GPIO_SUS11"),
 406         PINCTRL_PIN(22, "GPIO_SUS4"),
 407         PINCTRL_PIN(23, "SEC_GPIO_SUS8"),
 408         PINCTRL_PIN(24, "GPIO_SUS2"),
 409         PINCTRL_PIN(25, "GPIO_SUS6"),
 410         PINCTRL_PIN(26, "CX_PREQ_B"),
 411         PINCTRL_PIN(27, "SEC_GPIO_SUS9"),
 412
 413         PINCTRL_PIN(30, "TRST_B"),
 414         PINCTRL_PIN(31, "TCK"),
 415         PINCTRL_PIN(32, "PROCHOT_B"),
 416         PINCTRL_PIN(33, "SVIDO_DATA"),
 417         PINCTRL_PIN(34, "TMS"),
 418         PINCTRL_PIN(35, "CX_PRDY_B_2"),
 419         PINCTRL_PIN(36, "TDO_2"),
 420         PINCTRL_PIN(37, "CX_PRDY_B"),
 421         PINCTRL_PIN(38, "SVIDO_ALERT_B"),
 422         PINCTRL_PIN(39, "TDO"),
 423         PINCTRL_PIN(40, "SVIDO_CLK"),
 424         PINCTRL_PIN(41, "TDI"),
 425
 426         PINCTRL_PIN(45, "GP_CAMERASB_05"),
 427         PINCTRL_PIN(46, "GP_CAMERASB_02"),
 428         PINCTRL_PIN(47, "GP_CAMERASB_08"),
 429         PINCTRL_PIN(48, "GP_CAMERASB_00"),
 430         PINCTRL_PIN(49, "GP_CAMERASB_06"),
 431         PINCTRL_PIN(50, "GP_CAMERASB_10"),
 432         PINCTRL_PIN(51, "GP_CAMERASB_03"),
 433         PINCTRL_PIN(52, "GP_CAMERASB_09"),
 434         PINCTRL_PIN(53, "GP_CAMERASB_01"),
 435         PINCTRL_PIN(54, "GP_CAMERASB_07"),
 436         PINCTRL_PIN(55, "GP_CAMERASB_11"),
 437         PINCTRL_PIN(56, "GP_CAMERASB_04"),
 438
 439         PINCTRL_PIN(60, "PANEL0_BKLTEN"),
 440         PINCTRL_PIN(61, "HV_DDI0_HPD"),
 441         PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"),
 442         PINCTRL_PIN(63, "PANEL1_BKLTCTL"),
 443         PINCTRL_PIN(64, "HV_DDI1_HPD"),
 444         PINCTRL_PIN(65, "PANEL0_BKLTCTL"),
 445         PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"),
 446         PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"),
 447         PINCTRL_PIN(68, "HV_DDI2_HPD"),
 448         PINCTRL_PIN(69, "PANEL1_VDDEN"),
 449         PINCTRL_PIN(70, "PANEL1_BKLTEN"),
 450         PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"),
 451         PINCTRL_PIN(72, "PANEL0_VDDEN"),
 452 };
 453
 454 static const struct chv_gpio_pinrange north_gpio_ranges[] = {
 455         GPIO_PINRANGE(0, 8),
 456         GPIO_PINRANGE(15, 27),
 457         GPIO_PINRANGE(30, 41),
 458         GPIO_PINRANGE(45, 56),
 459         GPIO_PINRANGE(60, 72),
 460 };
 461
 462 static const struct chv_community north_community = {
 463         .uid = "2",
 464         .pins = north_pins,
 465         .npins = ARRAY_SIZE(north_pins),
 466         .gpio_ranges = north_gpio_ranges,
 467         .ngpio_ranges = ARRAY_SIZE(north_gpio_ranges),
 468         /*
 469          * North community can generate GPIO interrupts only for the first
 470          * 8 interrupts. The upper half (8-15) can only be used to trigger
 471          * GPEs.
 472          */
 473         .nirqs = 8,
 474         .acpi_space_id = 0x92,
 475 };
 476
 477 static const struct pinctrl_pin_desc east_pins[] = {
 478         PINCTRL_PIN(0, "PMU_SLP_S3_B"),
 479         PINCTRL_PIN(1, "PMU_BATLOW_B"),
 480         PINCTRL_PIN(2, "SUS_STAT_B"),
 481         PINCTRL_PIN(3, "PMU_SLP_S0IX_B"),
 482         PINCTRL_PIN(4, "PMU_AC_PRESENT"),
 483         PINCTRL_PIN(5, "PMU_PLTRST_B"),
 484         PINCTRL_PIN(6, "PMU_SUSCLK"),
 485         PINCTRL_PIN(7, "PMU_SLP_LAN_B"),
 486         PINCTRL_PIN(8, "PMU_PWRBTN_B"),
 487         PINCTRL_PIN(9, "PMU_SLP_S4_B"),
 488         PINCTRL_PIN(10, "PMU_WAKE_B"),
 489         PINCTRL_PIN(11, "PMU_WAKE_LAN_B"),
 490
 491         PINCTRL_PIN(15, "MF_ISH_GPIO_3"),
 492         PINCTRL_PIN(16, "MF_ISH_GPIO_7"),
 493         PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"),
 494         PINCTRL_PIN(18, "MF_ISH_GPIO_1"),
 495         PINCTRL_PIN(19, "MF_ISH_GPIO_5"),
 496         PINCTRL_PIN(20, "MF_ISH_GPIO_9"),
 497         PINCTRL_PIN(21, "MF_ISH_GPIO_0"),
 498         PINCTRL_PIN(22, "MF_ISH_GPIO_4"),
 499         PINCTRL_PIN(23, "MF_ISH_GPIO_8"),
 500         PINCTRL_PIN(24, "MF_ISH_GPIO_2"),
 501         PINCTRL_PIN(25, "MF_ISH_GPIO_6"),
 502         PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"),
 503 };
 504
 505 static const struct chv_gpio_pinrange east_gpio_ranges[] = {
 506         GPIO_PINRANGE(0, 11),
 507         GPIO_PINRANGE(15, 26),
 508 };
 509
 510 static const struct chv_community east_community = {
 511         .uid = "3",
 512         .pins = east_pins,
 513         .npins = ARRAY_SIZE(east_pins),
 514         .gpio_ranges = east_gpio_ranges,
 515         .ngpio_ranges = ARRAY_SIZE(east_gpio_ranges),
 516         .nirqs = 16,
 517         .acpi_space_id = 0x93,
 518 };
 519
 520 static const struct pinctrl_pin_desc southeast_pins[] = {
 521         PINCTRL_PIN(0, "MF_PLT_CLK0"),
 522         PINCTRL_PIN(1, "PWM1"),
 523         PINCTRL_PIN(2, "MF_PLT_CLK1"),
 524         PINCTRL_PIN(3, "MF_PLT_CLK4"),
 525         PINCTRL_PIN(4, "MF_PLT_CLK3"),
 526         PINCTRL_PIN(5, "PWM0"),
 527         PINCTRL_PIN(6, "MF_PLT_CLK5"),
 528         PINCTRL_PIN(7, "MF_PLT_CLK2"),
 529
 530         PINCTRL_PIN(15, "SDMMC2_D3_CD_B"),
 531         PINCTRL_PIN(16, "SDMMC1_CLK"),
 532         PINCTRL_PIN(17, "SDMMC1_D0"),
 533         PINCTRL_PIN(18, "SDMMC2_D1"),
 534         PINCTRL_PIN(19, "SDMMC2_CLK"),
 535         PINCTRL_PIN(20, "SDMMC1_D2"),
 536         PINCTRL_PIN(21, "SDMMC2_D2"),
 537         PINCTRL_PIN(22, "SDMMC2_CMD"),
 538         PINCTRL_PIN(23, "SDMMC1_CMD"),
 539         PINCTRL_PIN(24, "SDMMC1_D1"),
 540         PINCTRL_PIN(25, "SDMMC2_D0"),
 541         PINCTRL_PIN(26, "SDMMC1_D3_CD_B"),
 542
 543         PINCTRL_PIN(30, "SDMMC3_D1"),
 544         PINCTRL_PIN(31, "SDMMC3_CLK"),
 545         PINCTRL_PIN(32, "SDMMC3_D3"),
 546         PINCTRL_PIN(33, "SDMMC3_D2"),
 547         PINCTRL_PIN(34, "SDMMC3_CMD"),
 548         PINCTRL_PIN(35, "SDMMC3_D0"),
 549
 550         PINCTRL_PIN(45, "MF_LPC_AD2"),
 551         PINCTRL_PIN(46, "LPC_CLKRUNB"),
 552         PINCTRL_PIN(47, "MF_LPC_AD0"),
 553         PINCTRL_PIN(48, "LPC_FRAMEB"),
 554         PINCTRL_PIN(49, "MF_LPC_CLKOUT1"),
 555         PINCTRL_PIN(50, "MF_LPC_AD3"),
 556         PINCTRL_PIN(51, "MF_LPC_CLKOUT0"),
 557         PINCTRL_PIN(52, "MF_LPC_AD1"),
 558
 559         PINCTRL_PIN(60, "SPI1_MISO"),
 560         PINCTRL_PIN(61, "SPI1_CSO_B"),
 561         PINCTRL_PIN(62, "SPI1_CLK"),
 562         PINCTRL_PIN(63, "MMC1_D6"),
 563         PINCTRL_PIN(64, "SPI1_MOSI"),
 564         PINCTRL_PIN(65, "MMC1_D5"),
 565         PINCTRL_PIN(66, "SPI1_CS1_B"),
 566         PINCTRL_PIN(67, "MMC1_D4_SD_WE"),
 567         PINCTRL_PIN(68, "MMC1_D7"),
 568         PINCTRL_PIN(69, "MMC1_RCLK"),
 569
 570         PINCTRL_PIN(75, "USB_OC1_B"),
 571         PINCTRL_PIN(76, "PMU_RESETBUTTON_B"),
 572         PINCTRL_PIN(77, "GPIO_ALERT"),
 573         PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"),
 574         PINCTRL_PIN(79, "ILB_SERIRQ"),
 575         PINCTRL_PIN(80, "USB_OC0_B"),
 576         PINCTRL_PIN(81, "SDMMC3_CD_B"),
 577         PINCTRL_PIN(82, "SPKR"),
 578         PINCTRL_PIN(83, "SUSPWRDNACK"),
 579         PINCTRL_PIN(84, "SPARE_PIN"),
 580         PINCTRL_PIN(85, "SDMMC3_1P8_EN"),
 581 };
 582
 583 static const unsigned southeast_pwm0_pins[] = { 5 };
 584 static const unsigned southeast_pwm1_pins[] = { 1 };
 585 static const unsigned southeast_sdmmc1_pins[] = {
 586         16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69,
 587 };
 588 static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 };
 589 static const unsigned southeast_sdmmc3_pins[] = {
 590         30, 31, 32, 33, 34, 35, 78, 81, 85,
 591 };
 592 static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 };
 593 static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 };
 594
 595 static const struct chv_pingroup southeast_groups[] = {
 596         PIN_GROUP_WITH_ALT("pwm0_grp", southeast_pwm0_pins, 1, false),
 597         PIN_GROUP_WITH_ALT("pwm1_grp", southeast_pwm1_pins, 1, false),
 598         PIN_GROUP_WITH_ALT("sdmmc1_grp", southeast_sdmmc1_pins, 1, false),
 599         PIN_GROUP_WITH_ALT("sdmmc2_grp", southeast_sdmmc2_pins, 1, false),
 600         PIN_GROUP_WITH_ALT("sdmmc3_grp", southeast_sdmmc3_pins, 1, false),
 601         PIN_GROUP_WITH_ALT("spi1_grp", southeast_spi1_pins, 1, false),
 602         PIN_GROUP_WITH_ALT("spi2_grp", southeast_spi2_pins, 4, false),
 603 };
 604
 605 static const char * const southeast_pwm0_groups[] = { "pwm0_grp" };
 606 static const char * const southeast_pwm1_groups[] = { "pwm1_grp" };
 607 static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" };
 608 static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" };
 609 static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" };
 610 static const char * const southeast_spi1_groups[] = { "spi1_grp" };
 611 static const char * const southeast_spi2_groups[] = { "spi2_grp" };
 612
 613 static const struct intel_function southeast_functions[] = {
 614         FUNCTION("pwm0", southeast_pwm0_groups),
 615         FUNCTION("pwm1", southeast_pwm1_groups),
 616         FUNCTION("sdmmc1", southeast_sdmmc1_groups),
 617         FUNCTION("sdmmc2", southeast_sdmmc2_groups),
 618         FUNCTION("sdmmc3", southeast_sdmmc3_groups),
 619         FUNCTION("spi1", southeast_spi1_groups),
 620         FUNCTION("spi2", southeast_spi2_groups),
 621 };
 622
 623 static const struct chv_gpio_pinrange southeast_gpio_ranges[] = {
 624         GPIO_PINRANGE(0, 7),
 625         GPIO_PINRANGE(15, 26),
 626         GPIO_PINRANGE(30, 35),
 627         GPIO_PINRANGE(45, 52),
 628         GPIO_PINRANGE(60, 69),
 629         GPIO_PINRANGE(75, 85),
 630 };
 631
 632 static const struct chv_community southeast_community = {
 633         .uid = "4",
 634         .pins = southeast_pins,
 635         .npins = ARRAY_SIZE(southeast_pins),
 636         .groups = southeast_groups,
 637         .ngroups = ARRAY_SIZE(southeast_groups),
 638         .functions = southeast_functions,
 639         .nfunctions = ARRAY_SIZE(southeast_functions),
 640         .gpio_ranges = southeast_gpio_ranges,
 641         .ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges),
 642         .nirqs = 16,
 643         .acpi_space_id = 0x94,
 644 };
 645
 646 static const struct chv_community *chv_communities[] = {
 647         &southwest_community,
 648         &north_community,
 649         &east_community,
 650         &southeast_community,
 651 };
 652
 653 /*
 654  * Lock to serialize register accesses
 655  *
 656  * Due to a silicon issue, a shared lock must be used to prevent
 657  * concurrent accesses across the 4 GPIO controllers.
 658  *
 659  * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005),
 660  * errata #CHT34, for further information.
 661  */
 662 static DEFINE_RAW_SPINLOCK(chv_lock);
 663
 664 static void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned int offset,
 665                                 unsigned int reg)
 666 {
 667         unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
 668         unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
 669
 670         offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no +
 671                  GPIO_REGS_SIZE * pad_no;
 672
 673         return pctrl->regs + offset + reg;
 674 }
 675
 676 static void chv_writel(u32 value, void __iomem *reg)
 677 {
 678         writel(value, reg);
 679         /* simple readback to confirm the bus transferring done */
 680         readl(reg);
 681 }
 682
 683 /* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
 684 static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned int offset)
 685 {
 686         void __iomem *reg;
 687
 688         reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 689         return readl(reg) & CHV_PADCTRL1_CFGLOCK;
 690 }
 691
 692 static int chv_get_groups_count(struct pinctrl_dev *pctldev)
 693 {
 694         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 695
 696         return pctrl->community->ngroups;
 697 }
 698
 699 static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
 700                                       unsigned int group)
 701 {
 702         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 703
 704         return pctrl->community->groups[group].name;
 705 }
 706
 707 static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group,
 708                               const unsigned int **pins, unsigned int *npins)
 709 {
 710         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 711
 712         *pins = pctrl->community->groups[group].pins;
 713         *npins = pctrl->community->groups[group].npins;
 714         return 0;
 715 }
 716
 717 static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
 718                              unsigned int offset)
 719 {
 720         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 721         unsigned long flags;
 722         u32 ctrl0, ctrl1;
 723         bool locked;
 724
 725         raw_spin_lock_irqsave(&chv_lock, flags);
 726
 727         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 728         ctrl1 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL1));
 729         locked = chv_pad_locked(pctrl, offset);
 730
 731         raw_spin_unlock_irqrestore(&chv_lock, flags);
 732
 733         if (ctrl0 & CHV_PADCTRL0_GPIOEN) {
 734                 seq_puts(s, "GPIO ");
 735         } else {
 736                 u32 mode;
 737
 738                 mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK;
 739                 mode >>= CHV_PADCTRL0_PMODE_SHIFT;
 740
 741                 seq_printf(s, "mode %d ", mode);
 742         }
 743
 744         seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1);
 745
 746         if (locked)
 747                 seq_puts(s, " [LOCKED]");
 748 }
 749
 750 static const struct pinctrl_ops chv_pinctrl_ops = {
 751         .get_groups_count = chv_get_groups_count,
 752         .get_group_name = chv_get_group_name,
 753         .get_group_pins = chv_get_group_pins,
 754         .pin_dbg_show = chv_pin_dbg_show,
 755 };
 756
 757 static int chv_get_functions_count(struct pinctrl_dev *pctldev)
 758 {
 759         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 760
 761         return pctrl->community->nfunctions;
 762 }
 763
 764 static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
 765                                          unsigned int function)
 766 {
 767         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 768
 769         return pctrl->community->functions[function].name;
 770 }
 771
 772 static int chv_get_function_groups(struct pinctrl_dev *pctldev,
 773                                    unsigned int function,
 774                                    const char * const **groups,
 775                                    unsigned int * const ngroups)
 776 {
 777         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 778
 779         *groups = pctrl->community->functions[function].groups;
 780         *ngroups = pctrl->community->functions[function].ngroups;
 781         return 0;
 782 }
 783
 784 static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev,
 785                               unsigned int function, unsigned int group)
 786 {
 787         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 788         const struct chv_pingroup *grp;
 789         unsigned long flags;
 790         int i;
 791
 792         grp = &pctrl->community->groups[group];
 793
 794         raw_spin_lock_irqsave(&chv_lock, flags);
 795
 796         /* Check first that the pad is not locked */
 797         for (i = 0; i < grp->npins; i++) {
 798                 if (chv_pad_locked(pctrl, grp->pins[i])) {
 799                         dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
 800                                  grp->pins[i]);
 801                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 802                         return -EBUSY;
 803                 }
 804         }
 805
 806         for (i = 0; i < grp->npins; i++) {
 807                 const struct chv_alternate_function *altfunc = &grp->altfunc;
 808                 int pin = grp->pins[i];
 809                 void __iomem *reg;
 810                 u32 value;
 811
 812                 /* Check if there is pin-specific config */
 813                 if (grp->overrides) {
 814                         int j;
 815
 816                         for (j = 0; j < grp->noverrides; j++) {
 817                                 if (grp->overrides[j].pin == pin) {
 818                                         altfunc = &grp->overrides[j];
 819                                         break;
 820                                 }
 821                         }
 822                 }
 823
 824                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
 825                 value = readl(reg);
 826                 /* Disable GPIO mode */
 827                 value &= ~CHV_PADCTRL0_GPIOEN;
 828                 /* Set to desired mode */
 829                 value &= ~CHV_PADCTRL0_PMODE_MASK;
 830                 value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT;
 831                 chv_writel(value, reg);
 832
 833                 /* Update for invert_oe */
 834                 reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
 835                 value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK;
 836                 if (altfunc->invert_oe)
 837                         value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
 838                 chv_writel(value, reg);
 839
 840                 dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
 841                         pin, altfunc->mode, altfunc->invert_oe ? "" : "not ");
 842         }
 843
 844         raw_spin_unlock_irqrestore(&chv_lock, flags);
 845
 846         return 0;
 847 }
 848
 849 static void chv_gpio_clear_triggering(struct chv_pinctrl *pctrl,
 850                                       unsigned int offset)
 851 {
 852         void __iomem *reg;
 853         u32 value;
 854
 855         reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
 856         value = readl(reg);
 857         value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
 858         value &= ~CHV_PADCTRL1_INVRXTX_MASK;
 859         chv_writel(value, reg);
 860 }
 861
 862 static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
 863                                    struct pinctrl_gpio_range *range,
 864                                    unsigned int offset)
 865 {
 866         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 867         unsigned long flags;
 868         void __iomem *reg;
 869         u32 value;
 870
 871         raw_spin_lock_irqsave(&chv_lock, flags);
 872
 873         if (chv_pad_locked(pctrl, offset)) {
 874                 value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
 875                 if (!(value & CHV_PADCTRL0_GPIOEN)) {
 876                         /* Locked so cannot enable */
 877                         raw_spin_unlock_irqrestore(&chv_lock, flags);
 878                         return -EBUSY;
 879                 }
 880         } else {
 881                 int i;
 882
 883                 /* Reset the interrupt mapping */
 884                 for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) {
 885                         if (pctrl->intr_lines[i] == offset) {
 886                                 pctrl->intr_lines[i] = 0;
 887                                 break;
 888                         }
 889                 }
 890
 891                 /* Disable interrupt generation */
 892                 chv_gpio_clear_triggering(pctrl, offset);
 893
 894                 reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 895                 value = readl(reg);
 896
 897                 /*
 898                  * If the pin is in HiZ mode (both TX and RX buffers are
 899                  * disabled) we turn it to be input now.
 900                  */
 901                 if ((value & CHV_PADCTRL0_GPIOCFG_MASK) ==
 902                      (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) {
 903                         value &= ~CHV_PADCTRL0_GPIOCFG_MASK;
 904                         value |= CHV_PADCTRL0_GPIOCFG_GPI <<
 905                                 CHV_PADCTRL0_GPIOCFG_SHIFT;
 906                 }
 907
 908                 /* Switch to a GPIO mode */
 909                 value |= CHV_PADCTRL0_GPIOEN;
 910                 chv_writel(value, reg);
 911         }
 912
 913         raw_spin_unlock_irqrestore(&chv_lock, flags);
 914
 915         return 0;
 916 }
 917
 918 static void chv_gpio_disable_free(struct pinctrl_dev *pctldev,
 919                                   struct pinctrl_gpio_range *range,
 920                                   unsigned int offset)
 921 {
 922         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 923         unsigned long flags;
 924
 925         raw_spin_lock_irqsave(&chv_lock, flags);
 926
 927         if (!chv_pad_locked(pctrl, offset))
 928                 chv_gpio_clear_triggering(pctrl, offset);
 929
 930         raw_spin_unlock_irqrestore(&chv_lock, flags);
 931 }
 932
 933 static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
 934                                   struct pinctrl_gpio_range *range,
 935                                   unsigned int offset, bool input)
 936 {
 937         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 938         void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
 939         unsigned long flags;
 940         u32 ctrl0;
 941
 942         raw_spin_lock_irqsave(&chv_lock, flags);
 943
 944         ctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIOCFG_MASK;
 945         if (input)
 946                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT;
 947         else
 948                 ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT;
 949         chv_writel(ctrl0, reg);
 950
 951         raw_spin_unlock_irqrestore(&chv_lock, flags);
 952
 953         return 0;
 954 }
 955
 956 static const struct pinmux_ops chv_pinmux_ops = {
 957         .get_functions_count = chv_get_functions_count,
 958         .get_function_name = chv_get_function_name,
 959         .get_function_groups = chv_get_function_groups,
 960         .set_mux = chv_pinmux_set_mux,
 961         .gpio_request_enable = chv_gpio_request_enable,
 962         .gpio_disable_free = chv_gpio_disable_free,
 963         .gpio_set_direction = chv_gpio_set_direction,
 964 };
 965
 966 static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin,
 967                           unsigned long *config)
 968 {
 969         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
 970         enum pin_config_param param = pinconf_to_config_param(*config);
 971         unsigned long flags;
 972         u32 ctrl0, ctrl1;
 973         u16 arg = 0;
 974         u32 term;
 975
 976         raw_spin_lock_irqsave(&chv_lock, flags);
 977         ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
 978         ctrl1 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
 979         raw_spin_unlock_irqrestore(&chv_lock, flags);
 980
 981         term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT;
 982
 983         switch (param) {
 984         case PIN_CONFIG_BIAS_DISABLE:
 985                 if (term)
 986                         return -EINVAL;
 987                 break;
 988
 989         case PIN_CONFIG_BIAS_PULL_UP:
 990                 if (!(ctrl0 & CHV_PADCTRL0_TERM_UP))
 991                         return -EINVAL;
 992
 993                 switch (term) {
 994                 case CHV_PADCTRL0_TERM_20K:
 995                         arg = 20000;
 996                         break;
 997                 case CHV_PADCTRL0_TERM_5K:
 998                         arg = 5000;
 999                         break;
1000                 case CHV_PADCTRL0_TERM_1K:
1001                         arg = 1000;
1002                         break;
1003                 }
1004
1005                 break;
1006
1007         case PIN_CONFIG_BIAS_PULL_DOWN:
1008                 if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP))
1009                         return -EINVAL;
1010
1011                 switch (term) {
1012                 case CHV_PADCTRL0_TERM_20K:
1013                         arg = 20000;
1014                         break;
1015                 case CHV_PADCTRL0_TERM_5K:
1016                         arg = 5000;
1017                         break;
1018                 }
1019
1020                 break;
1021
1022         case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1023                 if (!(ctrl1 & CHV_PADCTRL1_ODEN))
1024                         return -EINVAL;
1025                 break;
1026
1027         case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: {
1028                 u32 cfg;
1029
1030                 cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1031                 cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1032                 if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ)
1033                         return -EINVAL;
1034
1035                 break;
1036         }
1037
1038         default:
1039                 return -ENOTSUPP;
1040         }
1041
1042         *config = pinconf_to_config_packed(param, arg);
1043         return 0;
1044 }
1045
1046 static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned int pin,
1047                                enum pin_config_param param, u32 arg)
1048 {
1049         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
1050         unsigned long flags;
1051         u32 ctrl0, pull;
1052
1053         raw_spin_lock_irqsave(&chv_lock, flags);
1054         ctrl0 = readl(reg);
1055
1056         switch (param) {
1057         case PIN_CONFIG_BIAS_DISABLE:
1058                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1059                 break;
1060
1061         case PIN_CONFIG_BIAS_PULL_UP:
1062                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1063
1064                 switch (arg) {
1065                 case 1000:
1066                         /* For 1k there is only pull up */
1067                         pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT;
1068                         break;
1069                 case 5000:
1070                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1071                         break;
1072                 case 20000:
1073                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1074                         break;
1075                 default:
1076                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1077                         return -EINVAL;
1078                 }
1079
1080                 ctrl0 |= CHV_PADCTRL0_TERM_UP | pull;
1081                 break;
1082
1083         case PIN_CONFIG_BIAS_PULL_DOWN:
1084                 ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP);
1085
1086                 switch (arg) {
1087                 case 5000:
1088                         pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT;
1089                         break;
1090                 case 20000:
1091                         pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT;
1092                         break;
1093                 default:
1094                         raw_spin_unlock_irqrestore(&chv_lock, flags);
1095                         return -EINVAL;
1096                 }
1097
1098                 ctrl0 |= pull;
1099                 break;
1100
1101         default:
1102                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1103                 return -EINVAL;
1104         }
1105
1106         chv_writel(ctrl0, reg);
1107         raw_spin_unlock_irqrestore(&chv_lock, flags);
1108
1109         return 0;
1110 }
1111
1112 static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,
1113                                bool enable)
1114 {
1115         void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1116         unsigned long flags;
1117         u32 ctrl1;
1118
1119         raw_spin_lock_irqsave(&chv_lock, flags);
1120         ctrl1 = readl(reg);
1121
1122         if (enable)
1123                 ctrl1 |= CHV_PADCTRL1_ODEN;
1124         else
1125                 ctrl1 &= ~CHV_PADCTRL1_ODEN;
1126
1127         chv_writel(ctrl1, reg);
1128         raw_spin_unlock_irqrestore(&chv_lock, flags);
1129
1130         return 0;
1131 }
1132
1133 static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin,
1134                           unsigned long *configs, unsigned int nconfigs)
1135 {
1136         struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
1137         enum pin_config_param param;
1138         int i, ret;
1139         u32 arg;
1140
1141         if (chv_pad_locked(pctrl, pin))
1142                 return -EBUSY;
1143
1144         for (i = 0; i < nconfigs; i++) {
1145                 param = pinconf_to_config_param(configs[i]);
1146                 arg = pinconf_to_config_argument(configs[i]);
1147
1148                 switch (param) {
1149                 case PIN_CONFIG_BIAS_DISABLE:
1150                 case PIN_CONFIG_BIAS_PULL_UP:
1151                 case PIN_CONFIG_BIAS_PULL_DOWN:
1152                         ret = chv_config_set_pull(pctrl, pin, param, arg);
1153                         if (ret)
1154                                 return ret;
1155                         break;
1156
1157                 case PIN_CONFIG_DRIVE_PUSH_PULL:
1158                         ret = chv_config_set_oden(pctrl, pin, false);
1159                         if (ret)
1160                                 return ret;
1161                         break;
1162
1163                 case PIN_CONFIG_DRIVE_OPEN_DRAIN:
1164                         ret = chv_config_set_oden(pctrl, pin, true);
1165                         if (ret)
1166                                 return ret;
1167                         break;
1168
1169                 default:
1170                         return -ENOTSUPP;
1171                 }
1172
1173                 dev_dbg(pctrl->dev, "pin %d set config %d arg %u\n", pin,
1174                         param, arg);
1175         }
1176
1177         return 0;
1178 }
1179
1180 static int chv_config_group_get(struct pinctrl_dev *pctldev,
1181                                 unsigned int group,
1182                                 unsigned long *config)
1183 {
1184         const unsigned int *pins;
1185         unsigned int npins;
1186         int ret;
1187
1188         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1189         if (ret)
1190                 return ret;
1191
1192         ret = chv_config_get(pctldev, pins[0], config);
1193         if (ret)
1194                 return ret;
1195
1196         return 0;
1197 }
1198
1199 static int chv_config_group_set(struct pinctrl_dev *pctldev,
1200                                 unsigned int group, unsigned long *configs,
1201                                 unsigned int num_configs)
1202 {
1203         const unsigned int *pins;
1204         unsigned int npins;
1205         int i, ret;
1206
1207         ret = chv_get_group_pins(pctldev, group, &pins, &npins);
1208         if (ret)
1209                 return ret;
1210
1211         for (i = 0; i < npins; i++) {
1212                 ret = chv_config_set(pctldev, pins[i], configs, num_configs);
1213                 if (ret)
1214                         return ret;
1215         }
1216
1217         return 0;
1218 }
1219
1220 static const struct pinconf_ops chv_pinconf_ops = {
1221         .is_generic = true,
1222         .pin_config_set = chv_config_set,
1223         .pin_config_get = chv_config_get,
1224         .pin_config_group_get = chv_config_group_get,
1225         .pin_config_group_set = chv_config_group_set,
1226 };
1227
1228 static struct pinctrl_desc chv_pinctrl_desc = {
1229         .pctlops = &chv_pinctrl_ops,
1230         .pmxops = &chv_pinmux_ops,
1231         .confops = &chv_pinconf_ops,
1232         .owner = THIS_MODULE,
1233 };
1234
1235 static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset)
1236 {
1237         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1238         unsigned long flags;
1239         u32 ctrl0, cfg;
1240
1241         raw_spin_lock_irqsave(&chv_lock, flags);
1242         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1243         raw_spin_unlock_irqrestore(&chv_lock, flags);
1244
1245         cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1246         cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1247
1248         if (cfg == CHV_PADCTRL0_GPIOCFG_GPO)
1249                 return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE);
1250         return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE);
1251 }
1252
1253 static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
1254 {
1255         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1256         unsigned long flags;
1257         void __iomem *reg;
1258         u32 ctrl0;
1259
1260         raw_spin_lock_irqsave(&chv_lock, flags);
1261
1262         reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
1263         ctrl0 = readl(reg);
1264
1265         if (value)
1266                 ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
1267         else
1268                 ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
1269
1270         chv_writel(ctrl0, reg);
1271
1272         raw_spin_unlock_irqrestore(&chv_lock, flags);
1273 }
1274
1275 static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset)
1276 {
1277         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1278         u32 ctrl0, direction;
1279         unsigned long flags;
1280
1281         raw_spin_lock_irqsave(&chv_lock, flags);
1282         ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
1283         raw_spin_unlock_irqrestore(&chv_lock, flags);
1284
1285         direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
1286         direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
1287
1288         return direction != CHV_PADCTRL0_GPIOCFG_GPO;
1289 }
1290
1291 static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
1292 {
1293         return pinctrl_gpio_direction_input(chip->base + offset);
1294 }
1295
1296 static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
1297                                      int value)
1298 {
1299         chv_gpio_set(chip, offset, value);
1300         return pinctrl_gpio_direction_output(chip->base + offset);
1301 }
1302
1303 static const struct gpio_chip chv_gpio_chip = {
1304         .owner = THIS_MODULE,
1305         .request = gpiochip_generic_request,
1306         .free = gpiochip_generic_free,
1307         .get_direction = chv_gpio_get_direction,
1308         .direction_input = chv_gpio_direction_input,
1309         .direction_output = chv_gpio_direction_output,
1310         .get = chv_gpio_get,
1311         .set = chv_gpio_set,
1312 };
1313
1314 static void chv_gpio_irq_ack(struct irq_data *d)
1315 {
1316         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1317         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1318         int pin = irqd_to_hwirq(d);
1319         u32 intr_line;
1320
1321         raw_spin_lock(&chv_lock);
1322
1323         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1324         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1325         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1326         chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT);
1327
1328         raw_spin_unlock(&chv_lock);
1329 }
1330
1331 static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
1332 {
1333         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1334         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1335         int pin = irqd_to_hwirq(d);
1336         u32 value, intr_line;
1337         unsigned long flags;
1338
1339         raw_spin_lock_irqsave(&chv_lock, flags);
1340
1341         intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1342         intr_line &= CHV_PADCTRL0_INTSEL_MASK;
1343         intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
1344
1345         value = readl(pctrl->regs + CHV_INTMASK);
1346         if (mask)
1347                 value &= ~BIT(intr_line);
1348         else
1349                 value |= BIT(intr_line);
1350         chv_writel(value, pctrl->regs + CHV_INTMASK);
1351
1352         raw_spin_unlock_irqrestore(&chv_lock, flags);
1353 }
1354
1355 static void chv_gpio_irq_mask(struct irq_data *d)
1356 {
1357         chv_gpio_irq_mask_unmask(d, true);
1358 }
1359
1360 static void chv_gpio_irq_unmask(struct irq_data *d)
1361 {
1362         chv_gpio_irq_mask_unmask(d, false);
1363 }
1364
1365 static unsigned chv_gpio_irq_startup(struct irq_data *d)
1366 {
1367         /*
1368          * Check if the interrupt has been requested with 0 as triggering
1369          * type. In that case it is assumed that the current values
1370          * programmed to the hardware are used (e.g BIOS configured
1371          * defaults).
1372          *
1373          * In that case ->irq_set_type() will never be called so we need to
1374          * read back the values from hardware now, set correct flow handler
1375          * and update mappings before the interrupt is being used.
1376          */
1377         if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) {
1378                 struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1379                 struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1380                 unsigned int pin = irqd_to_hwirq(d);
1381                 irq_flow_handler_t handler;
1382                 unsigned long flags;
1383                 u32 intsel, value;
1384
1385                 raw_spin_lock_irqsave(&chv_lock, flags);
1386                 intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1387                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1388                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1389
1390                 value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
1391                 if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
1392                         handler = handle_level_irq;
1393                 else
1394                         handler = handle_edge_irq;
1395
1396                 if (!pctrl->intr_lines[intsel]) {
1397                         irq_set_handler_locked(d, handler);
1398                         pctrl->intr_lines[intsel] = pin;
1399                 }
1400                 raw_spin_unlock_irqrestore(&chv_lock, flags);
1401         }
1402
1403         chv_gpio_irq_unmask(d);
1404         return 0;
1405 }
1406
1407 static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
1408 {
1409         struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
1410         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1411         unsigned int pin = irqd_to_hwirq(d);
1412         unsigned long flags;
1413         u32 value;
1414
1415         raw_spin_lock_irqsave(&chv_lock, flags);
1416
1417         /*
1418          * Pins which can be used as shared interrupt are configured in
1419          * BIOS. Driver trusts BIOS configurations and assigns different
1420          * handler according to the irq type.
1421          *
1422          * Driver needs to save the mapping between each pin and
1423          * its interrupt line.
1424          * 1. If the pin cfg is locked in BIOS:
1425          *      Trust BIOS has programmed IntWakeCfg bits correctly,
1426          *      driver just needs to save the mapping.
1427          * 2. If the pin cfg is not locked in BIOS:
1428          *      Driver programs the IntWakeCfg bits and save the mapping.
1429          */
1430         if (!chv_pad_locked(pctrl, pin)) {
1431                 void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
1432
1433                 value = readl(reg);
1434                 value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
1435                 value &= ~CHV_PADCTRL1_INVRXTX_MASK;
1436
1437                 if (type & IRQ_TYPE_EDGE_BOTH) {
1438                         if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH)
1439                                 value |= CHV_PADCTRL1_INTWAKECFG_BOTH;
1440                         else if (type & IRQ_TYPE_EDGE_RISING)
1441                                 value |= CHV_PADCTRL1_INTWAKECFG_RISING;
1442                         else if (type & IRQ_TYPE_EDGE_FALLING)
1443                                 value |= CHV_PADCTRL1_INTWAKECFG_FALLING;
1444                 } else if (type & IRQ_TYPE_LEVEL_MASK) {
1445                         value |= CHV_PADCTRL1_INTWAKECFG_LEVEL;
1446                         if (type & IRQ_TYPE_LEVEL_LOW)
1447                                 value |= CHV_PADCTRL1_INVRXTX_RXDATA;
1448                 }
1449
1450                 chv_writel(value, reg);
1451         }
1452
1453         value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
1454         value &= CHV_PADCTRL0_INTSEL_MASK;
1455         value >>= CHV_PADCTRL0_INTSEL_SHIFT;
1456
1457         pctrl->intr_lines[value] = pin;
1458
1459         if (type & IRQ_TYPE_EDGE_BOTH)
1460                 irq_set_handler_locked(d, handle_edge_irq);
1461         else if (type & IRQ_TYPE_LEVEL_MASK)
1462                 irq_set_handler_locked(d, handle_level_irq);
1463
1464         raw_spin_unlock_irqrestore(&chv_lock, flags);
1465
1466         return 0;
1467 }
1468
1469 static struct irq_chip chv_gpio_irqchip = {
1470         .name = "chv-gpio",
1471         .irq_startup = chv_gpio_irq_startup,
1472         .irq_ack = chv_gpio_irq_ack,
1473         .irq_mask = chv_gpio_irq_mask,
1474         .irq_unmask = chv_gpio_irq_unmask,
1475         .irq_set_type = chv_gpio_irq_type,
1476         .flags = IRQCHIP_SKIP_SET_WAKE,
1477 };
1478
1479 static void chv_gpio_irq_handler(struct irq_desc *desc)
1480 {
1481         struct gpio_chip *gc = irq_desc_get_handler_data(desc);
1482         struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
1483         struct irq_chip *chip = irq_desc_get_chip(desc);
1484         unsigned long pending;
1485         u32 intr_line;
1486
1487         chained_irq_enter(chip, desc);
1488
1489         pending = readl(pctrl->regs + CHV_INTSTAT);
1490         for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) {
1491                 unsigned irq, offset;
1492
1493                 offset = pctrl->intr_lines[intr_line];
1494                 irq = irq_find_mapping(gc->irq.domain, offset);
1495                 generic_handle_irq(irq);
1496         }
1497
1498         chained_irq_exit(chip, desc);
1499 }
1500
1501 /*
1502  * Certain machines seem to hardcode Linux IRQ numbers in their ACPI
1503  * tables. Since we leave GPIOs that are not capable of generating
1504  * interrupts out of the irqdomain the numbering will be different and
1505  * cause devices using the hardcoded IRQ numbers fail. In order not to
1506  * break such machines we will only mask pins from irqdomain if the machine
1507  * is not listed below.
1508  */
1509 static const struct dmi_system_id chv_no_valid_mask[] = {
1510         /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */
1511         {
1512                 .ident = "Intel_Strago based Chromebooks (All models)",
1513                 .matches = {
1514                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1515                         DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"),
1516                         DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"),
1517                 },
1518         },
1519         {
1520                 .ident = "HP Chromebook 11 G5 (Setzer)",
1521                 .matches = {
1522                         DMI_MATCH(DMI_SYS_VENDOR, "HP"),
1523                         DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"),
1524                         DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"),
1525                 },
1526         },
1527         {
1528                 .ident = "Acer Chromebook R11 (Cyan)",
1529                 .matches = {
1530                         DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"),
1531                         DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"),
1532                         DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"),
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                         DMI_MATCH(DMI_PRODUCT_VERSION, "1.0"),
1541                 },
1542         },
1543         {}
1544 };
1545
1546 static void chv_init_irq_valid_mask(struct gpio_chip *chip,
1547                                     unsigned long *valid_mask,
1548                                     unsigned int ngpios)
1549 {
1550         struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
1551         const struct chv_community *community = pctrl->community;
1552         int i;
1553
1554         /* Do not add GPIOs that can only generate GPEs to the IRQ domain */
1555         for (i = 0; i < community->npins; i++) {
1556                 const struct pinctrl_pin_desc *desc;
1557                 u32 intsel;
1558
1559                 desc = &community->pins[i];
1560
1561                 intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0));
1562                 intsel &= CHV_PADCTRL0_INTSEL_MASK;
1563                 intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
1564
1565                 if (intsel >= community->nirqs)
1566                         clear_bit(i, valid_mask);
1567         }
1568 }
1569
1570 static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
1571 {
1572         const struct chv_gpio_pinrange *range;
1573         struct gpio_chip *chip = &pctrl->chip;
1574         bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
1575         const struct chv_community *community = pctrl->community;
1576         int ret, i, irq_base;
1577
1578         *chip = chv_gpio_chip;
1579
1580         chip->ngpio = community->pins[community->npins - 1].number + 1;
1581         chip->label = dev_name(pctrl->dev);
1582         chip->parent = pctrl->dev;
1583         chip->base = -1;
1584         if (need_valid_mask)
1585                 chip->irq.init_valid_mask = chv_init_irq_valid_mask;
1586
1587         ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
1588         if (ret) {
1589                 dev_err(pctrl->dev, "Failed to register gpiochip\n");
1590                 return ret;
1591         }
1592
1593         for (i = 0; i < community->ngpio_ranges; i++) {
1594                 range = &community->gpio_ranges[i];
1595                 ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev),
1596                                              range->base, range->base,
1597                                              range->npins);
1598                 if (ret) {
1599                         dev_err(pctrl->dev, "failed to add GPIO pin range\n");
1600                         return ret;
1601                 }
1602         }
1603
1604         /*
1605          * The same set of machines in chv_no_valid_mask[] have incorrectly
1606          * configured GPIOs that generate spurious interrupts so we use
1607          * this same list to apply another quirk for them.
1608          *
1609          * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953.
1610          */
1611         if (!need_valid_mask) {
1612                 /*
1613                  * Mask all interrupts the community is able to generate
1614                  * but leave the ones that can only generate GPEs unmasked.
1615                  */
1616                 chv_writel(GENMASK(31, pctrl->community->nirqs),
1617                            pctrl->regs + CHV_INTMASK);
1618         }
1619
1620         /* Clear all interrupts */
1621         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1622
1623         if (!need_valid_mask) {
1624                 irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
1625                                                 community->npins, NUMA_NO_NODE);
1626                 if (irq_base < 0) {
1627                         dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
1628                         return irq_base;
1629                 }
1630         }
1631
1632         ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0,
1633                                    handle_bad_irq, IRQ_TYPE_NONE);
1634         if (ret) {
1635                 dev_err(pctrl->dev, "failed to add IRQ chip\n");
1636                 return ret;
1637         }
1638
1639         if (!need_valid_mask) {
1640                 for (i = 0; i < community->ngpio_ranges; i++) {
1641                         range = &community->gpio_ranges[i];
1642
1643                         irq_domain_associate_many(chip->irq.domain, irq_base,
1644                                                   range->base, range->npins);
1645                         irq_base += range->npins;
1646                 }
1647         }
1648
1649         gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
1650                                      chv_gpio_irq_handler);
1651         return 0;
1652 }
1653
1654 static acpi_status chv_pinctrl_mmio_access_handler(u32 function,
1655         acpi_physical_address address, u32 bits, u64 *value,
1656         void *handler_context, void *region_context)
1657 {
1658         struct chv_pinctrl *pctrl = region_context;
1659         unsigned long flags;
1660         acpi_status ret = AE_OK;
1661
1662         raw_spin_lock_irqsave(&chv_lock, flags);
1663
1664         if (function == ACPI_WRITE)
1665                 chv_writel((u32)(*value), pctrl->regs + (u32)address);
1666         else if (function == ACPI_READ)
1667                 *value = readl(pctrl->regs + (u32)address);
1668         else
1669                 ret = AE_BAD_PARAMETER;
1670
1671         raw_spin_unlock_irqrestore(&chv_lock, flags);
1672
1673         return ret;
1674 }
1675
1676 static int chv_pinctrl_probe(struct platform_device *pdev)
1677 {
1678         struct chv_pinctrl *pctrl;
1679         struct acpi_device *adev;
1680         acpi_status status;
1681         int ret, irq, i;
1682
1683         adev = ACPI_COMPANION(&pdev->dev);
1684         if (!adev)
1685                 return -ENODEV;
1686
1687         pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
1688         if (!pctrl)
1689                 return -ENOMEM;
1690
1691         for (i = 0; i < ARRAY_SIZE(chv_communities); i++)
1692                 if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) {
1693                         pctrl->community = chv_communities[i];
1694                         break;
1695                 }
1696         if (i == ARRAY_SIZE(chv_communities))
1697                 return -ENODEV;
1698
1699         pctrl->dev = &pdev->dev;
1700
1701 #ifdef CONFIG_PM_SLEEP
1702         pctrl->saved_pin_context = devm_kcalloc(pctrl->dev,
1703                 pctrl->community->npins, sizeof(*pctrl->saved_pin_context),
1704                 GFP_KERNEL);
1705         if (!pctrl->saved_pin_context)
1706                 return -ENOMEM;
1707 #endif
1708
1709         pctrl->regs = devm_platform_ioremap_resource(pdev, 0);
1710         if (IS_ERR(pctrl->regs))
1711                 return PTR_ERR(pctrl->regs);
1712
1713         irq = platform_get_irq(pdev, 0);
1714         if (irq < 0)
1715                 return irq;
1716
1717         pctrl->pctldesc = chv_pinctrl_desc;
1718         pctrl->pctldesc.name = dev_name(&pdev->dev);
1719         pctrl->pctldesc.pins = pctrl->community->pins;
1720         pctrl->pctldesc.npins = pctrl->community->npins;
1721
1722         pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc,
1723                                                pctrl);
1724         if (IS_ERR(pctrl->pctldev)) {
1725                 dev_err(&pdev->dev, "failed to register pinctrl driver\n");
1726                 return PTR_ERR(pctrl->pctldev);
1727         }
1728
1729         ret = chv_gpio_probe(pctrl, irq);
1730         if (ret)
1731                 return ret;
1732
1733         status = acpi_install_address_space_handler(adev->handle,
1734                                         pctrl->community->acpi_space_id,
1735                                         chv_pinctrl_mmio_access_handler,
1736                                         NULL, pctrl);
1737         if (ACPI_FAILURE(status))
1738                 dev_err(&pdev->dev, "failed to install ACPI addr space handler\n");
1739
1740         platform_set_drvdata(pdev, pctrl);
1741
1742         return 0;
1743 }
1744
1745 static int chv_pinctrl_remove(struct platform_device *pdev)
1746 {
1747         struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
1748
1749         acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
1750                                           pctrl->community->acpi_space_id,
1751                                           chv_pinctrl_mmio_access_handler);
1752
1753         return 0;
1754 }
1755
1756 #ifdef CONFIG_PM_SLEEP
1757 static int chv_pinctrl_suspend_noirq(struct device *dev)
1758 {
1759         struct chv_pinctrl *pctrl = dev_get_drvdata(dev);
1760         unsigned long flags;
1761         int i;
1762
1763         raw_spin_lock_irqsave(&chv_lock, flags);
1764
1765         pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK);
1766
1767         for (i = 0; i < pctrl->community->npins; i++) {
1768                 const struct pinctrl_pin_desc *desc;
1769                 struct chv_pin_context *ctx;
1770                 void __iomem *reg;
1771
1772                 desc = &pctrl->community->pins[i];
1773                 if (chv_pad_locked(pctrl, desc->number))
1774                         continue;
1775
1776                 ctx = &pctrl->saved_pin_context[i];
1777
1778                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1779                 ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1780
1781                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1782                 ctx->padctrl1 = readl(reg);
1783         }
1784
1785         raw_spin_unlock_irqrestore(&chv_lock, flags);
1786
1787         return 0;
1788 }
1789
1790 static int chv_pinctrl_resume_noirq(struct device *dev)
1791 {
1792         struct chv_pinctrl *pctrl = dev_get_drvdata(dev);
1793         unsigned long flags;
1794         int i;
1795
1796         raw_spin_lock_irqsave(&chv_lock, flags);
1797
1798         /*
1799          * Mask all interrupts before restoring per-pin configuration
1800          * registers because we don't know in which state BIOS left them
1801          * upon exiting suspend.
1802          */
1803         chv_writel(0, pctrl->regs + CHV_INTMASK);
1804
1805         for (i = 0; i < pctrl->community->npins; i++) {
1806                 const struct pinctrl_pin_desc *desc;
1807                 const struct chv_pin_context *ctx;
1808                 void __iomem *reg;
1809                 u32 val;
1810
1811                 desc = &pctrl->community->pins[i];
1812                 if (chv_pad_locked(pctrl, desc->number))
1813                         continue;
1814
1815                 ctx = &pctrl->saved_pin_context[i];
1816
1817                 /* Only restore if our saved state differs from the current */
1818                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
1819                 val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
1820                 if (ctx->padctrl0 != val) {
1821                         chv_writel(ctx->padctrl0, reg);
1822                         dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
1823                                 desc->number, readl(reg));
1824                 }
1825
1826                 reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
1827                 val = readl(reg);
1828                 if (ctx->padctrl1 != val) {
1829                         chv_writel(ctx->padctrl1, reg);
1830                         dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
1831                                 desc->number, readl(reg));
1832                 }
1833         }
1834
1835         /*
1836          * Now that all pins are restored to known state, we can restore
1837          * the interrupt mask register as well.
1838          */
1839         chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
1840         chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_INTMASK);
1841
1842         raw_spin_unlock_irqrestore(&chv_lock, flags);
1843
1844         return 0;
1845 }
1846 #endif
1847
1848 static const struct dev_pm_ops chv_pinctrl_pm_ops = {
1849         SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq,
1850                                       chv_pinctrl_resume_noirq)
1851 };
1852
1853 static const struct acpi_device_id chv_pinctrl_acpi_match[] = {
1854         { "INT33FF" },
1855         { }
1856 };
1857 MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match);
1858
1859 static struct platform_driver chv_pinctrl_driver = {
1860         .probe = chv_pinctrl_probe,
1861         .remove = chv_pinctrl_remove,
1862         .driver = {
1863                 .name = "cherryview-pinctrl",
1864                 .pm = &chv_pinctrl_pm_ops,
1865                 .acpi_match_table = chv_pinctrl_acpi_match,
1866         },
1867 };
1868
1869 static int __init chv_pinctrl_init(void)
1870 {
1871         return platform_driver_register(&chv_pinctrl_driver);
1872 }
1873 subsys_initcall(chv_pinctrl_init);
1874
1875 static void __exit chv_pinctrl_exit(void)
1876 {
1877         platform_driver_unregister(&chv_pinctrl_driver);
1878 }
1879 module_exit(chv_pinctrl_exit);
1880
1881 MODULE_AUTHOR("Mika Westerberg <[email protected]>");
1882 MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver");
1883 MODULE_LICENSE("GPL v2");