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Diffstat (limited to '')
| -rw-r--r-- | drivers/pinctrl/intel/pinctrl-cherryview.c | 1913 |
1 files changed, 1913 insertions, 0 deletions
diff --git a/drivers/pinctrl/intel/pinctrl-cherryview.c b/drivers/pinctrl/intel/pinctrl-cherryview.c new file mode 100644 index 000000000..de07b0837 --- /dev/null +++ b/drivers/pinctrl/intel/pinctrl-cherryview.c @@ -0,0 +1,1913 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Cherryview/Braswell pinctrl driver + * + * Copyright (C) 2014, 2020 Intel Corporation + * Author: Mika Westerberg <mika.westerberg@linux.intel.com> + * + * This driver is based on the original Cherryview GPIO driver by + * Ning Li <ning.li@intel.com> + * Alan Cox <alan@linux.intel.com> + */ + +#include <linux/acpi.h> +#include <linux/dmi.h> +#include <linux/gpio/driver.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/types.h> + +#include <linux/pinctrl/pinctrl.h> +#include <linux/pinctrl/pinmux.h> +#include <linux/pinctrl/pinconf.h> +#include <linux/pinctrl/pinconf-generic.h> + +#include "pinctrl-intel.h" + +#define CHV_INTSTAT 0x300 +#define CHV_INTMASK 0x380 + +#define FAMILY_PAD_REGS_OFF 0x4400 +#define FAMILY_PAD_REGS_SIZE 0x400 +#define MAX_FAMILY_PAD_GPIO_NO 15 +#define GPIO_REGS_SIZE 8 + +#define CHV_PADCTRL0 0x000 +#define CHV_PADCTRL0_INTSEL_SHIFT 28 +#define CHV_PADCTRL0_INTSEL_MASK GENMASK(31, 28) +#define CHV_PADCTRL0_TERM_UP BIT(23) +#define CHV_PADCTRL0_TERM_SHIFT 20 +#define CHV_PADCTRL0_TERM_MASK GENMASK(22, 20) +#define CHV_PADCTRL0_TERM_20K 1 +#define CHV_PADCTRL0_TERM_5K 2 +#define CHV_PADCTRL0_TERM_1K 4 +#define CHV_PADCTRL0_PMODE_SHIFT 16 +#define CHV_PADCTRL0_PMODE_MASK GENMASK(19, 16) +#define CHV_PADCTRL0_GPIOEN BIT(15) +#define CHV_PADCTRL0_GPIOCFG_SHIFT 8 +#define CHV_PADCTRL0_GPIOCFG_MASK GENMASK(10, 8) +#define CHV_PADCTRL0_GPIOCFG_GPIO 0 +#define CHV_PADCTRL0_GPIOCFG_GPO 1 +#define CHV_PADCTRL0_GPIOCFG_GPI 2 +#define CHV_PADCTRL0_GPIOCFG_HIZ 3 +#define CHV_PADCTRL0_GPIOTXSTATE BIT(1) +#define CHV_PADCTRL0_GPIORXSTATE BIT(0) + +#define CHV_PADCTRL1 0x004 +#define CHV_PADCTRL1_CFGLOCK BIT(31) +#define CHV_PADCTRL1_INVRXTX_SHIFT 4 +#define CHV_PADCTRL1_INVRXTX_MASK GENMASK(7, 4) +#define CHV_PADCTRL1_INVRXTX_TXDATA BIT(7) +#define CHV_PADCTRL1_INVRXTX_RXDATA BIT(6) +#define CHV_PADCTRL1_INVRXTX_TXENABLE BIT(5) +#define CHV_PADCTRL1_ODEN BIT(3) +#define CHV_PADCTRL1_INTWAKECFG_MASK GENMASK(2, 0) +#define CHV_PADCTRL1_INTWAKECFG_FALLING 1 +#define CHV_PADCTRL1_INTWAKECFG_RISING 2 +#define CHV_PADCTRL1_INTWAKECFG_BOTH 3 +#define CHV_PADCTRL1_INTWAKECFG_LEVEL 4 + +struct intel_pad_context { + u32 padctrl0; + u32 padctrl1; +}; + +#define CHV_INVALID_HWIRQ ((unsigned int)INVALID_HWIRQ) + +/** + * struct intel_community_context - community context for Cherryview + * @intr_lines: Mapping between 16 HW interrupt wires and GPIO offset (in GPIO number space) + * @saved_intmask: Interrupt mask saved for system sleep + */ +struct intel_community_context { + unsigned int intr_lines[16]; + u32 saved_intmask; +}; + +#define PINMODE_INVERT_OE BIT(15) + +#define PINMODE(m, i) ((m) | ((i) * PINMODE_INVERT_OE)) + +#define CHV_GPP(start, end) \ + { \ + .base = (start), \ + .size = (end) - (start) + 1, \ + } + +#define CHV_COMMUNITY(g, i, a) \ + { \ + .gpps = (g), \ + .ngpps = ARRAY_SIZE(g), \ + .nirqs = (i), \ + .acpi_space_id = (a), \ + } + +static const struct pinctrl_pin_desc southwest_pins[] = { + PINCTRL_PIN(0, "FST_SPI_D2"), + PINCTRL_PIN(1, "FST_SPI_D0"), + PINCTRL_PIN(2, "FST_SPI_CLK"), + PINCTRL_PIN(3, "FST_SPI_D3"), + PINCTRL_PIN(4, "FST_SPI_CS1_B"), + PINCTRL_PIN(5, "FST_SPI_D1"), + PINCTRL_PIN(6, "FST_SPI_CS0_B"), + PINCTRL_PIN(7, "FST_SPI_CS2_B"), + + PINCTRL_PIN(15, "UART1_RTS_B"), + PINCTRL_PIN(16, "UART1_RXD"), + PINCTRL_PIN(17, "UART2_RXD"), + PINCTRL_PIN(18, "UART1_CTS_B"), + PINCTRL_PIN(19, "UART2_RTS_B"), + PINCTRL_PIN(20, "UART1_TXD"), + PINCTRL_PIN(21, "UART2_TXD"), + PINCTRL_PIN(22, "UART2_CTS_B"), + + PINCTRL_PIN(30, "MF_HDA_CLK"), + PINCTRL_PIN(31, "MF_HDA_RSTB"), + PINCTRL_PIN(32, "MF_HDA_SDIO"), + PINCTRL_PIN(33, "MF_HDA_SDO"), + PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"), + PINCTRL_PIN(35, "MF_HDA_SYNC"), + PINCTRL_PIN(36, "MF_HDA_SDI1"), + PINCTRL_PIN(37, "MF_HDA_DOCKENB"), + + PINCTRL_PIN(45, "I2C5_SDA"), + PINCTRL_PIN(46, "I2C4_SDA"), + PINCTRL_PIN(47, "I2C6_SDA"), + PINCTRL_PIN(48, "I2C5_SCL"), + PINCTRL_PIN(49, "I2C_NFC_SDA"), + PINCTRL_PIN(50, "I2C4_SCL"), + PINCTRL_PIN(51, "I2C6_SCL"), + PINCTRL_PIN(52, "I2C_NFC_SCL"), + + PINCTRL_PIN(60, "I2C1_SDA"), + PINCTRL_PIN(61, "I2C0_SDA"), + PINCTRL_PIN(62, "I2C2_SDA"), + PINCTRL_PIN(63, "I2C1_SCL"), + PINCTRL_PIN(64, "I2C3_SDA"), + PINCTRL_PIN(65, "I2C0_SCL"), + PINCTRL_PIN(66, "I2C2_SCL"), + PINCTRL_PIN(67, "I2C3_SCL"), + + PINCTRL_PIN(75, "SATA_GP0"), + PINCTRL_PIN(76, "SATA_GP1"), + PINCTRL_PIN(77, "SATA_LEDN"), + PINCTRL_PIN(78, "SATA_GP2"), + PINCTRL_PIN(79, "MF_SMB_ALERTB"), + PINCTRL_PIN(80, "SATA_GP3"), + PINCTRL_PIN(81, "MF_SMB_CLK"), + PINCTRL_PIN(82, "MF_SMB_DATA"), + + PINCTRL_PIN(90, "PCIE_CLKREQ0B"), + PINCTRL_PIN(91, "PCIE_CLKREQ1B"), + PINCTRL_PIN(92, "GP_SSP_2_CLK"), + PINCTRL_PIN(93, "PCIE_CLKREQ2B"), + PINCTRL_PIN(94, "GP_SSP_2_RXD"), + PINCTRL_PIN(95, "PCIE_CLKREQ3B"), + PINCTRL_PIN(96, "GP_SSP_2_FS"), + PINCTRL_PIN(97, "GP_SSP_2_TXD"), +}; + +static const unsigned southwest_uart0_pins[] = { 16, 20 }; +static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 }; +static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 }; +static const unsigned southwest_i2c0_pins[] = { 61, 65 }; +static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 }; +static const unsigned southwest_lpe_pins[] = { + 30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97, +}; +static const unsigned southwest_i2c1_pins[] = { 60, 63 }; +static const unsigned southwest_i2c2_pins[] = { 62, 66 }; +static const unsigned southwest_i2c3_pins[] = { 64, 67 }; +static const unsigned southwest_i2c4_pins[] = { 46, 50 }; +static const unsigned southwest_i2c5_pins[] = { 45, 48 }; +static const unsigned southwest_i2c6_pins[] = { 47, 51 }; +static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 }; +static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 }; + +/* Some of LPE I2S TXD pins need to have OE inversion set */ +static const unsigned int southwest_lpe_altfuncs[] = { + PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 30, 31, 32, 33 */ + PINMODE(1, 1), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), /* 34, 35, 36, 37 */ + PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 0), PINMODE(1, 1), /* 92, 94, 96, 97 */ +}; + +/* + * Two spi3 chipselects are available in different mode than the main spi3 + * functionality, which is using mode 2. + */ +static const unsigned int southwest_spi3_altfuncs[] = { + PINMODE(3, 0), PINMODE(2, 0), PINMODE(3, 0), PINMODE(2, 0), /* 76, 79, 80, 81 */ + PINMODE(2, 0), /* 82 */ +}; + +static const struct intel_pingroup southwest_groups[] = { + PIN_GROUP("uart0_grp", southwest_uart0_pins, PINMODE(2, 0)), + PIN_GROUP("uart1_grp", southwest_uart1_pins, PINMODE(1, 0)), + PIN_GROUP("uart2_grp", southwest_uart2_pins, PINMODE(1, 0)), + PIN_GROUP("hda_grp", southwest_hda_pins, PINMODE(2, 0)), + PIN_GROUP("i2c0_grp", southwest_i2c0_pins, PINMODE(1, 1)), + PIN_GROUP("i2c1_grp", southwest_i2c1_pins, PINMODE(1, 1)), + PIN_GROUP("i2c2_grp", southwest_i2c2_pins, PINMODE(1, 1)), + PIN_GROUP("i2c3_grp", southwest_i2c3_pins, PINMODE(1, 1)), + PIN_GROUP("i2c4_grp", southwest_i2c4_pins, PINMODE(1, 1)), + PIN_GROUP("i2c5_grp", southwest_i2c5_pins, PINMODE(1, 1)), + PIN_GROUP("i2c6_grp", southwest_i2c6_pins, PINMODE(1, 1)), + PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, PINMODE(2, 1)), + PIN_GROUP("lpe_grp", southwest_lpe_pins, southwest_lpe_altfuncs), + PIN_GROUP("spi3_grp", southwest_spi3_pins, southwest_spi3_altfuncs), +}; + +static const char * const southwest_uart0_groups[] = { "uart0_grp" }; +static const char * const southwest_uart1_groups[] = { "uart1_grp" }; +static const char * const southwest_uart2_groups[] = { "uart2_grp" }; +static const char * const southwest_hda_groups[] = { "hda_grp" }; +static const char * const southwest_lpe_groups[] = { "lpe_grp" }; +static const char * const southwest_i2c0_groups[] = { "i2c0_grp" }; +static const char * const southwest_i2c1_groups[] = { "i2c1_grp" }; +static const char * const southwest_i2c2_groups[] = { "i2c2_grp" }; +static const char * const southwest_i2c3_groups[] = { "i2c3_grp" }; +static const char * const southwest_i2c4_groups[] = { "i2c4_grp" }; +static const char * const southwest_i2c5_groups[] = { "i2c5_grp" }; +static const char * const southwest_i2c6_groups[] = { "i2c6_grp" }; +static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" }; +static const char * const southwest_spi3_groups[] = { "spi3_grp" }; + +/* + * Only do pinmuxing for certain LPSS devices for now. Rest of the pins are + * enabled only as GPIOs. + */ +static const struct intel_function southwest_functions[] = { + FUNCTION("uart0", southwest_uart0_groups), + FUNCTION("uart1", southwest_uart1_groups), + FUNCTION("uart2", southwest_uart2_groups), + FUNCTION("hda", southwest_hda_groups), + FUNCTION("lpe", southwest_lpe_groups), + FUNCTION("i2c0", southwest_i2c0_groups), + FUNCTION("i2c1", southwest_i2c1_groups), + FUNCTION("i2c2", southwest_i2c2_groups), + FUNCTION("i2c3", southwest_i2c3_groups), + FUNCTION("i2c4", southwest_i2c4_groups), + FUNCTION("i2c5", southwest_i2c5_groups), + FUNCTION("i2c6", southwest_i2c6_groups), + FUNCTION("i2c_nfc", southwest_i2c_nfc_groups), + FUNCTION("spi3", southwest_spi3_groups), +}; + +static const struct intel_padgroup southwest_gpps[] = { + CHV_GPP(0, 7), + CHV_GPP(15, 22), + CHV_GPP(30, 37), + CHV_GPP(45, 52), + CHV_GPP(60, 67), + CHV_GPP(75, 82), + CHV_GPP(90, 97), +}; + +/* + * Southwest community can generate GPIO interrupts only for the first 8 + * interrupts. The upper half (8-15) can only be used to trigger GPEs. + */ +static const struct intel_community southwest_communities[] = { + CHV_COMMUNITY(southwest_gpps, 8, 0x91), +}; + +static const struct intel_pinctrl_soc_data southwest_soc_data = { + .uid = "1", + .pins = southwest_pins, + .npins = ARRAY_SIZE(southwest_pins), + .groups = southwest_groups, + .ngroups = ARRAY_SIZE(southwest_groups), + .functions = southwest_functions, + .nfunctions = ARRAY_SIZE(southwest_functions), + .communities = southwest_communities, + .ncommunities = ARRAY_SIZE(southwest_communities), +}; + +static const struct pinctrl_pin_desc north_pins[] = { + PINCTRL_PIN(0, "GPIO_DFX_0"), + PINCTRL_PIN(1, "GPIO_DFX_3"), + PINCTRL_PIN(2, "GPIO_DFX_7"), + PINCTRL_PIN(3, "GPIO_DFX_1"), + PINCTRL_PIN(4, "GPIO_DFX_5"), + PINCTRL_PIN(5, "GPIO_DFX_4"), + PINCTRL_PIN(6, "GPIO_DFX_8"), + PINCTRL_PIN(7, "GPIO_DFX_2"), + PINCTRL_PIN(8, "GPIO_DFX_6"), + + PINCTRL_PIN(15, "GPIO_SUS0"), + PINCTRL_PIN(16, "SEC_GPIO_SUS10"), + PINCTRL_PIN(17, "GPIO_SUS3"), + PINCTRL_PIN(18, "GPIO_SUS7"), + PINCTRL_PIN(19, "GPIO_SUS1"), + PINCTRL_PIN(20, "GPIO_SUS5"), + PINCTRL_PIN(21, "SEC_GPIO_SUS11"), + PINCTRL_PIN(22, "GPIO_SUS4"), + PINCTRL_PIN(23, "SEC_GPIO_SUS8"), + PINCTRL_PIN(24, "GPIO_SUS2"), + PINCTRL_PIN(25, "GPIO_SUS6"), + PINCTRL_PIN(26, "CX_PREQ_B"), + PINCTRL_PIN(27, "SEC_GPIO_SUS9"), + + PINCTRL_PIN(30, "TRST_B"), + PINCTRL_PIN(31, "TCK"), + PINCTRL_PIN(32, "PROCHOT_B"), + PINCTRL_PIN(33, "SVIDO_DATA"), + PINCTRL_PIN(34, "TMS"), + PINCTRL_PIN(35, "CX_PRDY_B_2"), + PINCTRL_PIN(36, "TDO_2"), + PINCTRL_PIN(37, "CX_PRDY_B"), + PINCTRL_PIN(38, "SVIDO_ALERT_B"), + PINCTRL_PIN(39, "TDO"), + PINCTRL_PIN(40, "SVIDO_CLK"), + PINCTRL_PIN(41, "TDI"), + + PINCTRL_PIN(45, "GP_CAMERASB_05"), + PINCTRL_PIN(46, "GP_CAMERASB_02"), + PINCTRL_PIN(47, "GP_CAMERASB_08"), + PINCTRL_PIN(48, "GP_CAMERASB_00"), + PINCTRL_PIN(49, "GP_CAMERASB_06"), + PINCTRL_PIN(50, "GP_CAMERASB_10"), + PINCTRL_PIN(51, "GP_CAMERASB_03"), + PINCTRL_PIN(52, "GP_CAMERASB_09"), + PINCTRL_PIN(53, "GP_CAMERASB_01"), + PINCTRL_PIN(54, "GP_CAMERASB_07"), + PINCTRL_PIN(55, "GP_CAMERASB_11"), + PINCTRL_PIN(56, "GP_CAMERASB_04"), + + PINCTRL_PIN(60, "PANEL0_BKLTEN"), + PINCTRL_PIN(61, "HV_DDI0_HPD"), + PINCTRL_PIN(62, "HV_DDI2_DDC_SDA"), + PINCTRL_PIN(63, "PANEL1_BKLTCTL"), + PINCTRL_PIN(64, "HV_DDI1_HPD"), + PINCTRL_PIN(65, "PANEL0_BKLTCTL"), + PINCTRL_PIN(66, "HV_DDI0_DDC_SDA"), + PINCTRL_PIN(67, "HV_DDI2_DDC_SCL"), + PINCTRL_PIN(68, "HV_DDI2_HPD"), + PINCTRL_PIN(69, "PANEL1_VDDEN"), + PINCTRL_PIN(70, "PANEL1_BKLTEN"), + PINCTRL_PIN(71, "HV_DDI0_DDC_SCL"), + PINCTRL_PIN(72, "PANEL0_VDDEN"), +}; + +static const struct intel_padgroup north_gpps[] = { + CHV_GPP(0, 8), + CHV_GPP(15, 27), + CHV_GPP(30, 41), + CHV_GPP(45, 56), + CHV_GPP(60, 72), +}; + +/* + * North community can generate GPIO interrupts only for the first 8 + * interrupts. The upper half (8-15) can only be used to trigger GPEs. + */ +static const struct intel_community north_communities[] = { + CHV_COMMUNITY(north_gpps, 8, 0x92), +}; + +static const struct intel_pinctrl_soc_data north_soc_data = { + .uid = "2", + .pins = north_pins, + .npins = ARRAY_SIZE(north_pins), + .communities = north_communities, + .ncommunities = ARRAY_SIZE(north_communities), +}; + +static const struct pinctrl_pin_desc east_pins[] = { + PINCTRL_PIN(0, "PMU_SLP_S3_B"), + PINCTRL_PIN(1, "PMU_BATLOW_B"), + PINCTRL_PIN(2, "SUS_STAT_B"), + PINCTRL_PIN(3, "PMU_SLP_S0IX_B"), + PINCTRL_PIN(4, "PMU_AC_PRESENT"), + PINCTRL_PIN(5, "PMU_PLTRST_B"), + PINCTRL_PIN(6, "PMU_SUSCLK"), + PINCTRL_PIN(7, "PMU_SLP_LAN_B"), + PINCTRL_PIN(8, "PMU_PWRBTN_B"), + PINCTRL_PIN(9, "PMU_SLP_S4_B"), + PINCTRL_PIN(10, "PMU_WAKE_B"), + PINCTRL_PIN(11, "PMU_WAKE_LAN_B"), + + PINCTRL_PIN(15, "MF_ISH_GPIO_3"), + PINCTRL_PIN(16, "MF_ISH_GPIO_7"), + PINCTRL_PIN(17, "MF_ISH_I2C1_SCL"), + PINCTRL_PIN(18, "MF_ISH_GPIO_1"), + PINCTRL_PIN(19, "MF_ISH_GPIO_5"), + PINCTRL_PIN(20, "MF_ISH_GPIO_9"), + PINCTRL_PIN(21, "MF_ISH_GPIO_0"), + PINCTRL_PIN(22, "MF_ISH_GPIO_4"), + PINCTRL_PIN(23, "MF_ISH_GPIO_8"), + PINCTRL_PIN(24, "MF_ISH_GPIO_2"), + PINCTRL_PIN(25, "MF_ISH_GPIO_6"), + PINCTRL_PIN(26, "MF_ISH_I2C1_SDA"), +}; + +static const struct intel_padgroup east_gpps[] = { + CHV_GPP(0, 11), + CHV_GPP(15, 26), +}; + +static const struct intel_community east_communities[] = { + CHV_COMMUNITY(east_gpps, 16, 0x93), +}; + +static const struct intel_pinctrl_soc_data east_soc_data = { + .uid = "3", + .pins = east_pins, + .npins = ARRAY_SIZE(east_pins), + .communities = east_communities, + .ncommunities = ARRAY_SIZE(east_communities), +}; + +static const struct pinctrl_pin_desc southeast_pins[] = { + PINCTRL_PIN(0, "MF_PLT_CLK0"), + PINCTRL_PIN(1, "PWM1"), + PINCTRL_PIN(2, "MF_PLT_CLK1"), + PINCTRL_PIN(3, "MF_PLT_CLK4"), + PINCTRL_PIN(4, "MF_PLT_CLK3"), + PINCTRL_PIN(5, "PWM0"), + PINCTRL_PIN(6, "MF_PLT_CLK5"), + PINCTRL_PIN(7, "MF_PLT_CLK2"), + + PINCTRL_PIN(15, "SDMMC2_D3_CD_B"), + PINCTRL_PIN(16, "SDMMC1_CLK"), + PINCTRL_PIN(17, "SDMMC1_D0"), + PINCTRL_PIN(18, "SDMMC2_D1"), + PINCTRL_PIN(19, "SDMMC2_CLK"), + PINCTRL_PIN(20, "SDMMC1_D2"), + PINCTRL_PIN(21, "SDMMC2_D2"), + PINCTRL_PIN(22, "SDMMC2_CMD"), + PINCTRL_PIN(23, "SDMMC1_CMD"), + PINCTRL_PIN(24, "SDMMC1_D1"), + PINCTRL_PIN(25, "SDMMC2_D0"), + PINCTRL_PIN(26, "SDMMC1_D3_CD_B"), + + PINCTRL_PIN(30, "SDMMC3_D1"), + PINCTRL_PIN(31, "SDMMC3_CLK"), + PINCTRL_PIN(32, "SDMMC3_D3"), + PINCTRL_PIN(33, "SDMMC3_D2"), + PINCTRL_PIN(34, "SDMMC3_CMD"), + PINCTRL_PIN(35, "SDMMC3_D0"), + + PINCTRL_PIN(45, "MF_LPC_AD2"), + PINCTRL_PIN(46, "LPC_CLKRUNB"), + PINCTRL_PIN(47, "MF_LPC_AD0"), + PINCTRL_PIN(48, "LPC_FRAMEB"), + PINCTRL_PIN(49, "MF_LPC_CLKOUT1"), + PINCTRL_PIN(50, "MF_LPC_AD3"), + PINCTRL_PIN(51, "MF_LPC_CLKOUT0"), + PINCTRL_PIN(52, "MF_LPC_AD1"), + + PINCTRL_PIN(60, "SPI1_MISO"), + PINCTRL_PIN(61, "SPI1_CSO_B"), + PINCTRL_PIN(62, "SPI1_CLK"), + PINCTRL_PIN(63, "MMC1_D6"), + PINCTRL_PIN(64, "SPI1_MOSI"), + PINCTRL_PIN(65, "MMC1_D5"), + PINCTRL_PIN(66, "SPI1_CS1_B"), + PINCTRL_PIN(67, "MMC1_D4_SD_WE"), + PINCTRL_PIN(68, "MMC1_D7"), + PINCTRL_PIN(69, "MMC1_RCLK"), + + PINCTRL_PIN(75, "USB_OC1_B"), + PINCTRL_PIN(76, "PMU_RESETBUTTON_B"), + PINCTRL_PIN(77, "GPIO_ALERT"), + PINCTRL_PIN(78, "SDMMC3_PWR_EN_B"), + PINCTRL_PIN(79, "ILB_SERIRQ"), + PINCTRL_PIN(80, "USB_OC0_B"), + PINCTRL_PIN(81, "SDMMC3_CD_B"), + PINCTRL_PIN(82, "SPKR"), + PINCTRL_PIN(83, "SUSPWRDNACK"), + PINCTRL_PIN(84, "SPARE_PIN"), + PINCTRL_PIN(85, "SDMMC3_1P8_EN"), +}; + +static const unsigned southeast_pwm0_pins[] = { 5 }; +static const unsigned southeast_pwm1_pins[] = { 1 }; +static const unsigned southeast_sdmmc1_pins[] = { + 16, 17, 20, 23, 24, 26, 63, 65, 67, 68, 69, +}; +static const unsigned southeast_sdmmc2_pins[] = { 15, 18, 19, 21, 22, 25 }; +static const unsigned southeast_sdmmc3_pins[] = { + 30, 31, 32, 33, 34, 35, 78, 81, 85, +}; +static const unsigned southeast_spi1_pins[] = { 60, 61, 62, 64, 66 }; +static const unsigned southeast_spi2_pins[] = { 2, 3, 4, 6, 7 }; + +static const struct intel_pingroup southeast_groups[] = { + PIN_GROUP("pwm0_grp", southeast_pwm0_pins, PINMODE(1, 0)), + PIN_GROUP("pwm1_grp", southeast_pwm1_pins, PINMODE(1, 0)), + PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, PINMODE(1, 0)), + PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, PINMODE(1, 0)), + PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, PINMODE(1, 0)), + PIN_GROUP("spi1_grp", southeast_spi1_pins, PINMODE(1, 0)), + PIN_GROUP("spi2_grp", southeast_spi2_pins, PINMODE(4, 0)), +}; + +static const char * const southeast_pwm0_groups[] = { "pwm0_grp" }; +static const char * const southeast_pwm1_groups[] = { "pwm1_grp" }; +static const char * const southeast_sdmmc1_groups[] = { "sdmmc1_grp" }; +static const char * const southeast_sdmmc2_groups[] = { "sdmmc2_grp" }; +static const char * const southeast_sdmmc3_groups[] = { "sdmmc3_grp" }; +static const char * const southeast_spi1_groups[] = { "spi1_grp" }; +static const char * const southeast_spi2_groups[] = { "spi2_grp" }; + +static const struct intel_function southeast_functions[] = { + FUNCTION("pwm0", southeast_pwm0_groups), + FUNCTION("pwm1", southeast_pwm1_groups), + FUNCTION("sdmmc1", southeast_sdmmc1_groups), + FUNCTION("sdmmc2", southeast_sdmmc2_groups), + FUNCTION("sdmmc3", southeast_sdmmc3_groups), + FUNCTION("spi1", southeast_spi1_groups), + FUNCTION("spi2", southeast_spi2_groups), +}; + +static const struct intel_padgroup southeast_gpps[] = { + CHV_GPP(0, 7), + CHV_GPP(15, 26), + CHV_GPP(30, 35), + CHV_GPP(45, 52), + CHV_GPP(60, 69), + CHV_GPP(75, 85), +}; + +static const struct intel_community southeast_communities[] = { + CHV_COMMUNITY(southeast_gpps, 16, 0x94), +}; + +static const struct intel_pinctrl_soc_data southeast_soc_data = { + .uid = "4", + .pins = southeast_pins, + .npins = ARRAY_SIZE(southeast_pins), + .groups = southeast_groups, + .ngroups = ARRAY_SIZE(southeast_groups), + .functions = southeast_functions, + .nfunctions = ARRAY_SIZE(southeast_functions), + .communities = southeast_communities, + .ncommunities = ARRAY_SIZE(southeast_communities), +}; + +static const struct intel_pinctrl_soc_data *chv_soc_data[] = { + &southwest_soc_data, + &north_soc_data, + &east_soc_data, + &southeast_soc_data, + NULL +}; + +/* + * Lock to serialize register accesses + * + * Due to a silicon issue, a shared lock must be used to prevent + * concurrent accesses across the 4 GPIO controllers. + * + * See Intel Atom Z8000 Processor Series Specification Update (Rev. 005), + * errata #CHT34, for further information. + */ +static DEFINE_RAW_SPINLOCK(chv_lock); + +static u32 chv_pctrl_readl(struct intel_pinctrl *pctrl, unsigned int offset) +{ + const struct intel_community *community = &pctrl->communities[0]; + + return readl(community->regs + offset); +} + +static void chv_pctrl_writel(struct intel_pinctrl *pctrl, unsigned int offset, u32 value) +{ + const struct intel_community *community = &pctrl->communities[0]; + void __iomem *reg = community->regs + offset; + + /* Write and simple read back to confirm the bus transferring done */ + writel(value, reg); + readl(reg); +} + +static void __iomem *chv_padreg(struct intel_pinctrl *pctrl, unsigned int offset, + unsigned int reg) +{ + const struct intel_community *community = &pctrl->communities[0]; + unsigned int family_no = offset / MAX_FAMILY_PAD_GPIO_NO; + unsigned int pad_no = offset % MAX_FAMILY_PAD_GPIO_NO; + + offset = FAMILY_PAD_REGS_SIZE * family_no + GPIO_REGS_SIZE * pad_no; + + return community->pad_regs + offset + reg; +} + +static u32 chv_readl(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset) +{ + return readl(chv_padreg(pctrl, pin, offset)); +} + +static void chv_writel(struct intel_pinctrl *pctrl, unsigned int pin, unsigned int offset, u32 value) +{ + void __iomem *reg = chv_padreg(pctrl, pin, offset); + + /* Write and simple read back to confirm the bus transferring done */ + writel(value, reg); + readl(reg); +} + +/* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */ +static bool chv_pad_locked(struct intel_pinctrl *pctrl, unsigned int offset) +{ + return chv_readl(pctrl, offset, CHV_PADCTRL1) & CHV_PADCTRL1_CFGLOCK; +} + +static int chv_get_groups_count(struct pinctrl_dev *pctldev) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->ngroups; +} + +static const char *chv_get_group_name(struct pinctrl_dev *pctldev, + unsigned int group) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->groups[group].grp.name; +} + +static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned int group, + const unsigned int **pins, unsigned int *npins) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *pins = pctrl->soc->groups[group].grp.pins; + *npins = pctrl->soc->groups[group].grp.npins; + return 0; +} + +static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s, + unsigned int offset) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + u32 ctrl0, ctrl1; + bool locked; + + raw_spin_lock_irqsave(&chv_lock, flags); + + ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); + ctrl1 = chv_readl(pctrl, offset, CHV_PADCTRL1); + locked = chv_pad_locked(pctrl, offset); + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + if (ctrl0 & CHV_PADCTRL0_GPIOEN) { + seq_puts(s, "GPIO "); + } else { + u32 mode; + + mode = ctrl0 & CHV_PADCTRL0_PMODE_MASK; + mode >>= CHV_PADCTRL0_PMODE_SHIFT; + + seq_printf(s, "mode %d ", mode); + } + + seq_printf(s, "0x%08x 0x%08x", ctrl0, ctrl1); + + if (locked) + seq_puts(s, " [LOCKED]"); +} + +static const struct pinctrl_ops chv_pinctrl_ops = { + .get_groups_count = chv_get_groups_count, + .get_group_name = chv_get_group_name, + .get_group_pins = chv_get_group_pins, + .pin_dbg_show = chv_pin_dbg_show, +}; + +static int chv_get_functions_count(struct pinctrl_dev *pctldev) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->nfunctions; +} + +static const char *chv_get_function_name(struct pinctrl_dev *pctldev, + unsigned int function) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + return pctrl->soc->functions[function].name; +} + +static int chv_get_function_groups(struct pinctrl_dev *pctldev, + unsigned int function, + const char * const **groups, + unsigned int * const ngroups) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + + *groups = pctrl->soc->functions[function].groups; + *ngroups = pctrl->soc->functions[function].ngroups; + return 0; +} + +static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, + unsigned int function, unsigned int group) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + struct device *dev = pctrl->dev; + const struct intel_pingroup *grp; + unsigned long flags; + int i; + + grp = &pctrl->soc->groups[group]; + + raw_spin_lock_irqsave(&chv_lock, flags); + + /* Check first that the pad is not locked */ + for (i = 0; i < grp->grp.npins; i++) { + if (chv_pad_locked(pctrl, grp->grp.pins[i])) { + raw_spin_unlock_irqrestore(&chv_lock, flags); + dev_warn(dev, "unable to set mode for locked pin %u\n", grp->grp.pins[i]); + return -EBUSY; + } + } + + for (i = 0; i < grp->grp.npins; i++) { + int pin = grp->grp.pins[i]; + unsigned int mode; + bool invert_oe; + u32 value; + + /* Check if there is pin-specific config */ + if (grp->modes) + mode = grp->modes[i]; + else + mode = grp->mode; + + /* Extract OE inversion */ + invert_oe = mode & PINMODE_INVERT_OE; + mode &= ~PINMODE_INVERT_OE; + + value = chv_readl(pctrl, pin, CHV_PADCTRL0); + /* Disable GPIO mode */ + value &= ~CHV_PADCTRL0_GPIOEN; + /* Set to desired mode */ + value &= ~CHV_PADCTRL0_PMODE_MASK; + value |= mode << CHV_PADCTRL0_PMODE_SHIFT; + chv_writel(pctrl, pin, CHV_PADCTRL0, value); + + /* Update for invert_oe */ + value = chv_readl(pctrl, pin, CHV_PADCTRL1) & ~CHV_PADCTRL1_INVRXTX_MASK; + if (invert_oe) + value |= CHV_PADCTRL1_INVRXTX_TXENABLE; + chv_writel(pctrl, pin, CHV_PADCTRL1, value); + + dev_dbg(dev, "configured pin %u mode %u OE %sinverted\n", pin, mode, + invert_oe ? "" : "not "); + } + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static void chv_gpio_clear_triggering(struct intel_pinctrl *pctrl, + unsigned int offset) +{ + u32 invrxtx_mask = CHV_PADCTRL1_INVRXTX_MASK; + u32 value; + + /* + * One some devices the GPIO should output the inverted value from what + * device-drivers / ACPI code expects (inverted external buffer?). The + * BIOS makes this work by setting the CHV_PADCTRL1_INVRXTX_TXDATA flag, + * preserve this flag if the pin is already setup as GPIO. + */ + value = chv_readl(pctrl, offset, CHV_PADCTRL0); + if (value & CHV_PADCTRL0_GPIOEN) + invrxtx_mask &= ~CHV_PADCTRL1_INVRXTX_TXDATA; + + value = chv_readl(pctrl, offset, CHV_PADCTRL1); + value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; + value &= ~invrxtx_mask; + chv_writel(pctrl, offset, CHV_PADCTRL1, value); +} + +static int chv_gpio_request_enable(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + u32 value; + + raw_spin_lock_irqsave(&chv_lock, flags); + + if (chv_pad_locked(pctrl, offset)) { + value = chv_readl(pctrl, offset, CHV_PADCTRL0); + if (!(value & CHV_PADCTRL0_GPIOEN)) { + /* Locked so cannot enable */ + raw_spin_unlock_irqrestore(&chv_lock, flags); + return -EBUSY; + } + } else { + struct intel_community_context *cctx = &pctrl->context.communities[0]; + int i; + + /* Reset the interrupt mapping */ + for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) { + if (cctx->intr_lines[i] == offset) { + cctx->intr_lines[i] = CHV_INVALID_HWIRQ; + break; + } + } + + /* Disable interrupt generation */ + chv_gpio_clear_triggering(pctrl, offset); + + value = chv_readl(pctrl, offset, CHV_PADCTRL0); + + /* + * If the pin is in HiZ mode (both TX and RX buffers are + * disabled) we turn it to be input now. + */ + if ((value & CHV_PADCTRL0_GPIOCFG_MASK) == + (CHV_PADCTRL0_GPIOCFG_HIZ << CHV_PADCTRL0_GPIOCFG_SHIFT)) { + value &= ~CHV_PADCTRL0_GPIOCFG_MASK; + value |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; + } + + /* Switch to a GPIO mode */ + value |= CHV_PADCTRL0_GPIOEN; + chv_writel(pctrl, offset, CHV_PADCTRL0, value); + } + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static void chv_gpio_disable_free(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + + raw_spin_lock_irqsave(&chv_lock, flags); + + if (!chv_pad_locked(pctrl, offset)) + chv_gpio_clear_triggering(pctrl, offset); + + raw_spin_unlock_irqrestore(&chv_lock, flags); +} + +static int chv_gpio_set_direction(struct pinctrl_dev *pctldev, + struct pinctrl_gpio_range *range, + unsigned int offset, bool input) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + unsigned long flags; + u32 ctrl0; + + raw_spin_lock_irqsave(&chv_lock, flags); + + ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0) & ~CHV_PADCTRL0_GPIOCFG_MASK; + if (input) + ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPI << CHV_PADCTRL0_GPIOCFG_SHIFT; + else + ctrl0 |= CHV_PADCTRL0_GPIOCFG_GPO << CHV_PADCTRL0_GPIOCFG_SHIFT; + chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static const struct pinmux_ops chv_pinmux_ops = { + .get_functions_count = chv_get_functions_count, + .get_function_name = chv_get_function_name, + .get_function_groups = chv_get_function_groups, + .set_mux = chv_pinmux_set_mux, + .gpio_request_enable = chv_gpio_request_enable, + .gpio_disable_free = chv_gpio_disable_free, + .gpio_set_direction = chv_gpio_set_direction, +}; + +static int chv_config_get(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *config) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + enum pin_config_param param = pinconf_to_config_param(*config); + unsigned long flags; + u32 ctrl0, ctrl1; + u16 arg = 0; + u32 term; + + raw_spin_lock_irqsave(&chv_lock, flags); + ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); + ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + term = (ctrl0 & CHV_PADCTRL0_TERM_MASK) >> CHV_PADCTRL0_TERM_SHIFT; + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + if (term) + return -EINVAL; + break; + + case PIN_CONFIG_BIAS_PULL_UP: + if (!(ctrl0 & CHV_PADCTRL0_TERM_UP)) + return -EINVAL; + + switch (term) { + case CHV_PADCTRL0_TERM_20K: + arg = 20000; + break; + case CHV_PADCTRL0_TERM_5K: + arg = 5000; + break; + case CHV_PADCTRL0_TERM_1K: + arg = 1000; + break; + } + + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + if (!term || (ctrl0 & CHV_PADCTRL0_TERM_UP)) + return -EINVAL; + + switch (term) { + case CHV_PADCTRL0_TERM_20K: + arg = 20000; + break; + case CHV_PADCTRL0_TERM_5K: + arg = 5000; + break; + } + + break; + + case PIN_CONFIG_BIAS_HIGH_IMPEDANCE: { + u32 cfg; + + cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; + cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; + if (cfg != CHV_PADCTRL0_GPIOCFG_HIZ) + return -EINVAL; + + break; + + case PIN_CONFIG_DRIVE_PUSH_PULL: + if (ctrl1 & CHV_PADCTRL1_ODEN) + return -EINVAL; + break; + + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + if (!(ctrl1 & CHV_PADCTRL1_ODEN)) + return -EINVAL; + break; + } + + default: + return -ENOTSUPP; + } + + *config = pinconf_to_config_packed(param, arg); + return 0; +} + +static int chv_config_set_pull(struct intel_pinctrl *pctrl, unsigned int pin, + enum pin_config_param param, u32 arg) +{ + unsigned long flags; + u32 ctrl0, pull; + + raw_spin_lock_irqsave(&chv_lock, flags); + ctrl0 = chv_readl(pctrl, pin, CHV_PADCTRL0); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); + break; + + case PIN_CONFIG_BIAS_PULL_UP: + ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); + + switch (arg) { + case 1000: + /* For 1k there is only pull up */ + pull = CHV_PADCTRL0_TERM_1K << CHV_PADCTRL0_TERM_SHIFT; + break; + case 5000: + pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; + break; + case 20000: + pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; + break; + default: + raw_spin_unlock_irqrestore(&chv_lock, flags); + return -EINVAL; + } + + ctrl0 |= CHV_PADCTRL0_TERM_UP | pull; + break; + + case PIN_CONFIG_BIAS_PULL_DOWN: + ctrl0 &= ~(CHV_PADCTRL0_TERM_MASK | CHV_PADCTRL0_TERM_UP); + + switch (arg) { + case 5000: + pull = CHV_PADCTRL0_TERM_5K << CHV_PADCTRL0_TERM_SHIFT; + break; + case 20000: + pull = CHV_PADCTRL0_TERM_20K << CHV_PADCTRL0_TERM_SHIFT; + break; + default: + raw_spin_unlock_irqrestore(&chv_lock, flags); + return -EINVAL; + } + + ctrl0 |= pull; + break; + + default: + raw_spin_unlock_irqrestore(&chv_lock, flags); + return -EINVAL; + } + + chv_writel(pctrl, pin, CHV_PADCTRL0, ctrl0); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static int chv_config_set_oden(struct intel_pinctrl *pctrl, unsigned int pin, + bool enable) +{ + unsigned long flags; + u32 ctrl1; + + raw_spin_lock_irqsave(&chv_lock, flags); + ctrl1 = chv_readl(pctrl, pin, CHV_PADCTRL1); + + if (enable) + ctrl1 |= CHV_PADCTRL1_ODEN; + else + ctrl1 &= ~CHV_PADCTRL1_ODEN; + + chv_writel(pctrl, pin, CHV_PADCTRL1, ctrl1); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static int chv_config_set(struct pinctrl_dev *pctldev, unsigned int pin, + unsigned long *configs, unsigned int nconfigs) +{ + struct intel_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev); + struct device *dev = pctrl->dev; + enum pin_config_param param; + int i, ret; + u32 arg; + + if (chv_pad_locked(pctrl, pin)) + return -EBUSY; + + for (i = 0; i < nconfigs; i++) { + param = pinconf_to_config_param(configs[i]); + arg = pinconf_to_config_argument(configs[i]); + + switch (param) { + case PIN_CONFIG_BIAS_DISABLE: + case PIN_CONFIG_BIAS_PULL_UP: + case PIN_CONFIG_BIAS_PULL_DOWN: + ret = chv_config_set_pull(pctrl, pin, param, arg); + if (ret) + return ret; + break; + + case PIN_CONFIG_DRIVE_PUSH_PULL: + ret = chv_config_set_oden(pctrl, pin, false); + if (ret) + return ret; + break; + + case PIN_CONFIG_DRIVE_OPEN_DRAIN: + ret = chv_config_set_oden(pctrl, pin, true); + if (ret) + return ret; + break; + + default: + return -ENOTSUPP; + } + + dev_dbg(dev, "pin %d set config %d arg %u\n", pin, param, arg); + } + + return 0; +} + +static int chv_config_group_get(struct pinctrl_dev *pctldev, + unsigned int group, + unsigned long *config) +{ + const unsigned int *pins; + unsigned int npins; + int ret; + + ret = chv_get_group_pins(pctldev, group, &pins, &npins); + if (ret) + return ret; + + ret = chv_config_get(pctldev, pins[0], config); + if (ret) + return ret; + + return 0; +} + +static int chv_config_group_set(struct pinctrl_dev *pctldev, + unsigned int group, unsigned long *configs, + unsigned int num_configs) +{ + const unsigned int *pins; + unsigned int npins; + int i, ret; + + ret = chv_get_group_pins(pctldev, group, &pins, &npins); + if (ret) + return ret; + + for (i = 0; i < npins; i++) { + ret = chv_config_set(pctldev, pins[i], configs, num_configs); + if (ret) + return ret; + } + + return 0; +} + +static const struct pinconf_ops chv_pinconf_ops = { + .is_generic = true, + .pin_config_set = chv_config_set, + .pin_config_get = chv_config_get, + .pin_config_group_get = chv_config_group_get, + .pin_config_group_set = chv_config_group_set, +}; + +static struct pinctrl_desc chv_pinctrl_desc = { + .pctlops = &chv_pinctrl_ops, + .pmxops = &chv_pinmux_ops, + .confops = &chv_pinconf_ops, + .owner = THIS_MODULE, +}; + +static int chv_gpio_get(struct gpio_chip *chip, unsigned int offset) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + u32 ctrl0, cfg; + + raw_spin_lock_irqsave(&chv_lock, flags); + ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + cfg = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; + cfg >>= CHV_PADCTRL0_GPIOCFG_SHIFT; + + if (cfg == CHV_PADCTRL0_GPIOCFG_GPO) + return !!(ctrl0 & CHV_PADCTRL0_GPIOTXSTATE); + return !!(ctrl0 & CHV_PADCTRL0_GPIORXSTATE); +} + +static void chv_gpio_set(struct gpio_chip *chip, unsigned int offset, int value) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + unsigned long flags; + u32 ctrl0; + + raw_spin_lock_irqsave(&chv_lock, flags); + + ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); + + if (value) + ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE; + else + ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE; + + chv_writel(pctrl, offset, CHV_PADCTRL0, ctrl0); + + raw_spin_unlock_irqrestore(&chv_lock, flags); +} + +static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned int offset) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + u32 ctrl0, direction; + unsigned long flags; + + raw_spin_lock_irqsave(&chv_lock, flags); + ctrl0 = chv_readl(pctrl, offset, CHV_PADCTRL0); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK; + direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT; + + if (direction == CHV_PADCTRL0_GPIOCFG_GPO) + return GPIO_LINE_DIRECTION_OUT; + + return GPIO_LINE_DIRECTION_IN; +} + +static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned int offset) +{ + return pinctrl_gpio_direction_input(chip->base + offset); +} + +static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned int offset, + int value) +{ + chv_gpio_set(chip, offset, value); + return pinctrl_gpio_direction_output(chip->base + offset); +} + +static const struct gpio_chip chv_gpio_chip = { + .owner = THIS_MODULE, + .request = gpiochip_generic_request, + .free = gpiochip_generic_free, + .get_direction = chv_gpio_get_direction, + .direction_input = chv_gpio_direction_input, + .direction_output = chv_gpio_direction_output, + .get = chv_gpio_get, + .set = chv_gpio_set, +}; + +static void chv_gpio_irq_ack(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + irq_hw_number_t hwirq = irqd_to_hwirq(d); + u32 intr_line; + + raw_spin_lock(&chv_lock); + + intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0); + intr_line &= CHV_PADCTRL0_INTSEL_MASK; + intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; + chv_pctrl_writel(pctrl, CHV_INTSTAT, BIT(intr_line)); + + raw_spin_unlock(&chv_lock); +} + +static void chv_gpio_irq_mask_unmask(struct gpio_chip *gc, irq_hw_number_t hwirq, bool mask) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + u32 value, intr_line; + unsigned long flags; + + raw_spin_lock_irqsave(&chv_lock, flags); + + intr_line = chv_readl(pctrl, hwirq, CHV_PADCTRL0); + intr_line &= CHV_PADCTRL0_INTSEL_MASK; + intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT; + + value = chv_pctrl_readl(pctrl, CHV_INTMASK); + if (mask) + value &= ~BIT(intr_line); + else + value |= BIT(intr_line); + chv_pctrl_writel(pctrl, CHV_INTMASK, value); + + raw_spin_unlock_irqrestore(&chv_lock, flags); +} + +static void chv_gpio_irq_mask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + irq_hw_number_t hwirq = irqd_to_hwirq(d); + + chv_gpio_irq_mask_unmask(gc, hwirq, true); + gpiochip_disable_irq(gc, hwirq); +} + +static void chv_gpio_irq_unmask(struct irq_data *d) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + irq_hw_number_t hwirq = irqd_to_hwirq(d); + + gpiochip_enable_irq(gc, hwirq); + chv_gpio_irq_mask_unmask(gc, hwirq, false); +} + +static unsigned chv_gpio_irq_startup(struct irq_data *d) +{ + /* + * Check if the interrupt has been requested with 0 as triggering + * type. In that case it is assumed that the current values + * programmed to the hardware are used (e.g BIOS configured + * defaults). + * + * In that case ->irq_set_type() will never be called so we need to + * read back the values from hardware now, set correct flow handler + * and update mappings before the interrupt is being used. + */ + if (irqd_get_trigger_type(d) == IRQ_TYPE_NONE) { + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + struct device *dev = pctrl->dev; + struct intel_community_context *cctx = &pctrl->context.communities[0]; + irq_hw_number_t hwirq = irqd_to_hwirq(d); + irq_flow_handler_t handler; + unsigned long flags; + u32 intsel, value; + + raw_spin_lock_irqsave(&chv_lock, flags); + intsel = chv_readl(pctrl, hwirq, CHV_PADCTRL0); + intsel &= CHV_PADCTRL0_INTSEL_MASK; + intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; + + value = chv_readl(pctrl, hwirq, CHV_PADCTRL1); + if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL) + handler = handle_level_irq; + else + handler = handle_edge_irq; + + if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { + irq_set_handler_locked(d, handler); + dev_dbg(dev, "using interrupt line %u for IRQ_TYPE_NONE on pin %lu\n", + intsel, hwirq); + cctx->intr_lines[intsel] = hwirq; + } + raw_spin_unlock_irqrestore(&chv_lock, flags); + } + + chv_gpio_irq_unmask(d); + return 0; +} + +static int chv_gpio_set_intr_line(struct intel_pinctrl *pctrl, unsigned int pin) +{ + struct device *dev = pctrl->dev; + struct intel_community_context *cctx = &pctrl->context.communities[0]; + const struct intel_community *community = &pctrl->communities[0]; + u32 value, intsel; + int i; + + value = chv_readl(pctrl, pin, CHV_PADCTRL0); + intsel = (value & CHV_PADCTRL0_INTSEL_MASK) >> CHV_PADCTRL0_INTSEL_SHIFT; + + if (cctx->intr_lines[intsel] == pin) + return 0; + + if (cctx->intr_lines[intsel] == CHV_INVALID_HWIRQ) { + dev_dbg(dev, "using interrupt line %u for pin %u\n", intsel, pin); + cctx->intr_lines[intsel] = pin; + return 0; + } + + /* + * The interrupt line selected by the BIOS is already in use by + * another pin, this is a known BIOS bug found on several models. + * But this may also be caused by Linux deciding to use a pin as + * IRQ which was not expected to be used as such by the BIOS authors, + * so log this at info level only. + */ + dev_info(dev, "interrupt line %u is used by both pin %u and pin %u\n", intsel, + cctx->intr_lines[intsel], pin); + + if (chv_pad_locked(pctrl, pin)) + return -EBUSY; + + /* + * The BIOS fills the interrupt lines from 0 counting up, start at + * the other end to find a free interrupt line to workaround this. + */ + for (i = community->nirqs - 1; i >= 0; i--) { + if (cctx->intr_lines[i] == CHV_INVALID_HWIRQ) + break; + } + if (i < 0) + return -EBUSY; + + dev_info(dev, "changing the interrupt line for pin %u to %d\n", pin, i); + + value = (value & ~CHV_PADCTRL0_INTSEL_MASK) | (i << CHV_PADCTRL0_INTSEL_SHIFT); + chv_writel(pctrl, pin, CHV_PADCTRL0, value); + cctx->intr_lines[i] = pin; + + return 0; +} + +static int chv_gpio_irq_type(struct irq_data *d, unsigned int type) +{ + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + irq_hw_number_t hwirq = irqd_to_hwirq(d); + unsigned long flags; + u32 value; + int ret; + + raw_spin_lock_irqsave(&chv_lock, flags); + + ret = chv_gpio_set_intr_line(pctrl, hwirq); + if (ret) + goto out_unlock; + + /* + * Pins which can be used as shared interrupt are configured in + * BIOS. Driver trusts BIOS configurations and assigns different + * handler according to the irq type. + * + * Driver needs to save the mapping between each pin and + * its interrupt line. + * 1. If the pin cfg is locked in BIOS: + * Trust BIOS has programmed IntWakeCfg bits correctly, + * driver just needs to save the mapping. + * 2. If the pin cfg is not locked in BIOS: + * Driver programs the IntWakeCfg bits and save the mapping. + */ + if (!chv_pad_locked(pctrl, hwirq)) { + value = chv_readl(pctrl, hwirq, CHV_PADCTRL1); + value &= ~CHV_PADCTRL1_INTWAKECFG_MASK; + value &= ~CHV_PADCTRL1_INVRXTX_MASK; + + if (type & IRQ_TYPE_EDGE_BOTH) { + if ((type & IRQ_TYPE_EDGE_BOTH) == IRQ_TYPE_EDGE_BOTH) + value |= CHV_PADCTRL1_INTWAKECFG_BOTH; + else if (type & IRQ_TYPE_EDGE_RISING) + value |= CHV_PADCTRL1_INTWAKECFG_RISING; + else if (type & IRQ_TYPE_EDGE_FALLING) + value |= CHV_PADCTRL1_INTWAKECFG_FALLING; + } else if (type & IRQ_TYPE_LEVEL_MASK) { + value |= CHV_PADCTRL1_INTWAKECFG_LEVEL; + if (type & IRQ_TYPE_LEVEL_LOW) + value |= CHV_PADCTRL1_INVRXTX_RXDATA; + } + + chv_writel(pctrl, hwirq, CHV_PADCTRL1, value); + } + + if (type & IRQ_TYPE_EDGE_BOTH) + irq_set_handler_locked(d, handle_edge_irq); + else if (type & IRQ_TYPE_LEVEL_MASK) + irq_set_handler_locked(d, handle_level_irq); + +out_unlock: + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return ret; +} + +static const struct irq_chip chv_gpio_irq_chip = { + .name = "chv-gpio", + .irq_startup = chv_gpio_irq_startup, + .irq_ack = chv_gpio_irq_ack, + .irq_mask = chv_gpio_irq_mask, + .irq_unmask = chv_gpio_irq_unmask, + .irq_set_type = chv_gpio_irq_type, + .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_IMMUTABLE, + GPIOCHIP_IRQ_RESOURCE_HELPERS, +}; + +static void chv_gpio_irq_handler(struct irq_desc *desc) +{ + struct gpio_chip *gc = irq_desc_get_handler_data(desc); + struct intel_pinctrl *pctrl = gpiochip_get_data(gc); + struct device *dev = pctrl->dev; + const struct intel_community *community = &pctrl->communities[0]; + struct intel_community_context *cctx = &pctrl->context.communities[0]; + struct irq_chip *chip = irq_desc_get_chip(desc); + unsigned long pending; + unsigned long flags; + u32 intr_line; + + chained_irq_enter(chip, desc); + + raw_spin_lock_irqsave(&chv_lock, flags); + pending = chv_pctrl_readl(pctrl, CHV_INTSTAT); + raw_spin_unlock_irqrestore(&chv_lock, flags); + + for_each_set_bit(intr_line, &pending, community->nirqs) { + unsigned int offset; + + offset = cctx->intr_lines[intr_line]; + if (offset == CHV_INVALID_HWIRQ) { + dev_warn_once(dev, "interrupt on unmapped interrupt line %u\n", intr_line); + /* Some boards expect hwirq 0 to trigger in this case */ + offset = 0; + } + + generic_handle_domain_irq(gc->irq.domain, offset); + } + + chained_irq_exit(chip, desc); +} + +/* + * Certain machines seem to hardcode Linux IRQ numbers in their ACPI + * tables. Since we leave GPIOs that are not capable of generating + * interrupts out of the irqdomain the numbering will be different and + * cause devices using the hardcoded IRQ numbers fail. In order not to + * break such machines we will only mask pins from irqdomain if the machine + * is not listed below. + */ +static const struct dmi_system_id chv_no_valid_mask[] = { + /* See https://bugzilla.kernel.org/show_bug.cgi?id=194945 */ + { + .ident = "Intel_Strago based Chromebooks (All models)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), + DMI_MATCH(DMI_PRODUCT_FAMILY, "Intel_Strago"), + }, + }, + { + .ident = "HP Chromebook 11 G5 (Setzer)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "HP"), + DMI_MATCH(DMI_PRODUCT_NAME, "Setzer"), + }, + }, + { + .ident = "Acer Chromebook R11 (Cyan)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), + DMI_MATCH(DMI_PRODUCT_NAME, "Cyan"), + }, + }, + { + .ident = "Samsung Chromebook 3 (Celes)", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE"), + DMI_MATCH(DMI_PRODUCT_NAME, "Celes"), + }, + }, + {} +}; + +static void chv_init_irq_valid_mask(struct gpio_chip *chip, + unsigned long *valid_mask, + unsigned int ngpios) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + const struct intel_community *community = &pctrl->communities[0]; + int i; + + /* Do not add GPIOs that can only generate GPEs to the IRQ domain */ + for (i = 0; i < pctrl->soc->npins; i++) { + const struct pinctrl_pin_desc *desc; + u32 intsel; + + desc = &pctrl->soc->pins[i]; + + intsel = chv_readl(pctrl, desc->number, CHV_PADCTRL0); + intsel &= CHV_PADCTRL0_INTSEL_MASK; + intsel >>= CHV_PADCTRL0_INTSEL_SHIFT; + + if (intsel >= community->nirqs) + clear_bit(desc->number, valid_mask); + } +} + +static int chv_gpio_irq_init_hw(struct gpio_chip *chip) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + const struct intel_community *community = &pctrl->communities[0]; + + /* + * The same set of machines in chv_no_valid_mask[] have incorrectly + * configured GPIOs that generate spurious interrupts so we use + * this same list to apply another quirk for them. + * + * See also https://bugzilla.kernel.org/show_bug.cgi?id=197953. + */ + if (!pctrl->chip.irq.init_valid_mask) { + /* + * Mask all interrupts the community is able to generate + * but leave the ones that can only generate GPEs unmasked. + */ + chv_pctrl_writel(pctrl, CHV_INTMASK, GENMASK(31, community->nirqs)); + } + + /* Clear all interrupts */ + chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); + + return 0; +} + +static int chv_gpio_add_pin_ranges(struct gpio_chip *chip) +{ + struct intel_pinctrl *pctrl = gpiochip_get_data(chip); + struct device *dev = pctrl->dev; + const struct intel_community *community = &pctrl->communities[0]; + const struct intel_padgroup *gpp; + int ret, i; + + for (i = 0; i < community->ngpps; i++) { + gpp = &community->gpps[i]; + ret = gpiochip_add_pin_range(chip, dev_name(dev), gpp->base, gpp->base, gpp->size); + if (ret) { + dev_err(dev, "failed to add GPIO pin range\n"); + return ret; + } + } + + return 0; +} + +static int chv_gpio_probe(struct intel_pinctrl *pctrl, int irq) +{ + const struct intel_community *community = &pctrl->communities[0]; + const struct intel_padgroup *gpp; + struct gpio_chip *chip = &pctrl->chip; + struct device *dev = pctrl->dev; + bool need_valid_mask = !dmi_check_system(chv_no_valid_mask); + int ret, i, irq_base; + + *chip = chv_gpio_chip; + + chip->ngpio = pctrl->soc->pins[pctrl->soc->npins - 1].number + 1; + chip->label = dev_name(dev); + chip->add_pin_ranges = chv_gpio_add_pin_ranges; + chip->parent = dev; + chip->base = -1; + + pctrl->irq = irq; + + gpio_irq_chip_set_chip(&chip->irq, &chv_gpio_irq_chip); + chip->irq.init_hw = chv_gpio_irq_init_hw; + chip->irq.parent_handler = chv_gpio_irq_handler; + chip->irq.num_parents = 1; + chip->irq.parents = &pctrl->irq; + chip->irq.default_type = IRQ_TYPE_NONE; + chip->irq.handler = handle_bad_irq; + if (need_valid_mask) { + chip->irq.init_valid_mask = chv_init_irq_valid_mask; + } else { + irq_base = devm_irq_alloc_descs(dev, -1, 0, pctrl->soc->npins, NUMA_NO_NODE); + if (irq_base < 0) { + dev_err(dev, "Failed to allocate IRQ numbers\n"); + return irq_base; + } + } + + ret = devm_gpiochip_add_data(dev, chip, pctrl); + if (ret) { + dev_err(dev, "Failed to register gpiochip\n"); + return ret; + } + + if (!need_valid_mask) { + for (i = 0; i < community->ngpps; i++) { + gpp = &community->gpps[i]; + + irq_domain_associate_many(chip->irq.domain, irq_base, + gpp->base, gpp->size); + irq_base += gpp->size; + } + } + + return 0; +} + +static acpi_status chv_pinctrl_mmio_access_handler(u32 function, + acpi_physical_address address, u32 bits, u64 *value, + void *handler_context, void *region_context) +{ + struct intel_pinctrl *pctrl = region_context; + unsigned long flags; + acpi_status ret = AE_OK; + + raw_spin_lock_irqsave(&chv_lock, flags); + + if (function == ACPI_WRITE) + chv_pctrl_writel(pctrl, address, *value); + else if (function == ACPI_READ) + *value = chv_pctrl_readl(pctrl, address); + else + ret = AE_BAD_PARAMETER; + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return ret; +} + +static int chv_pinctrl_probe(struct platform_device *pdev) +{ + const struct intel_pinctrl_soc_data *soc_data; + struct intel_community_context *cctx; + struct intel_community *community; + struct device *dev = &pdev->dev; + struct intel_pinctrl *pctrl; + acpi_status status; + unsigned int i; + int ret, irq; + + soc_data = intel_pinctrl_get_soc_data(pdev); + if (IS_ERR(soc_data)) + return PTR_ERR(soc_data); + + pctrl = devm_kzalloc(dev, sizeof(*pctrl), GFP_KERNEL); + if (!pctrl) + return -ENOMEM; + + pctrl->dev = dev; + pctrl->soc = soc_data; + + pctrl->ncommunities = pctrl->soc->ncommunities; + pctrl->communities = devm_kmemdup(dev, pctrl->soc->communities, + pctrl->ncommunities * sizeof(*pctrl->communities), + GFP_KERNEL); + if (!pctrl->communities) + return -ENOMEM; + + community = &pctrl->communities[0]; + community->regs = devm_platform_ioremap_resource(pdev, 0); + if (IS_ERR(community->regs)) + return PTR_ERR(community->regs); + + community->pad_regs = community->regs + FAMILY_PAD_REGS_OFF; + +#ifdef CONFIG_PM_SLEEP + pctrl->context.pads = devm_kcalloc(dev, pctrl->soc->npins, + sizeof(*pctrl->context.pads), + GFP_KERNEL); + if (!pctrl->context.pads) + return -ENOMEM; +#endif + + pctrl->context.communities = devm_kcalloc(dev, pctrl->soc->ncommunities, + sizeof(*pctrl->context.communities), + GFP_KERNEL); + if (!pctrl->context.communities) + return -ENOMEM; + + cctx = &pctrl->context.communities[0]; + for (i = 0; i < ARRAY_SIZE(cctx->intr_lines); i++) + cctx->intr_lines[i] = CHV_INVALID_HWIRQ; + + irq = platform_get_irq(pdev, 0); + if (irq < 0) + return irq; + + pctrl->pctldesc = chv_pinctrl_desc; + pctrl->pctldesc.name = dev_name(dev); + pctrl->pctldesc.pins = pctrl->soc->pins; + pctrl->pctldesc.npins = pctrl->soc->npins; + + pctrl->pctldev = devm_pinctrl_register(dev, &pctrl->pctldesc, pctrl); + if (IS_ERR(pctrl->pctldev)) { + dev_err(dev, "failed to register pinctrl driver\n"); + return PTR_ERR(pctrl->pctldev); + } + + ret = chv_gpio_probe(pctrl, irq); + if (ret) + return ret; + + status = acpi_install_address_space_handler(ACPI_HANDLE(dev), + community->acpi_space_id, + chv_pinctrl_mmio_access_handler, + NULL, pctrl); + if (ACPI_FAILURE(status)) + dev_err(dev, "failed to install ACPI addr space handler\n"); + + platform_set_drvdata(pdev, pctrl); + + return 0; +} + +static int chv_pinctrl_remove(struct platform_device *pdev) +{ + struct intel_pinctrl *pctrl = platform_get_drvdata(pdev); + const struct intel_community *community = &pctrl->communities[0]; + + acpi_remove_address_space_handler(ACPI_HANDLE(&pdev->dev), + community->acpi_space_id, + chv_pinctrl_mmio_access_handler); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int chv_pinctrl_suspend_noirq(struct device *dev) +{ + struct intel_pinctrl *pctrl = dev_get_drvdata(dev); + struct intel_community_context *cctx = &pctrl->context.communities[0]; + unsigned long flags; + int i; + + raw_spin_lock_irqsave(&chv_lock, flags); + + cctx->saved_intmask = chv_pctrl_readl(pctrl, CHV_INTMASK); + + for (i = 0; i < pctrl->soc->npins; i++) { + const struct pinctrl_pin_desc *desc; + struct intel_pad_context *ctx = &pctrl->context.pads[i]; + + desc = &pctrl->soc->pins[i]; + if (chv_pad_locked(pctrl, desc->number)) + continue; + + ctx->padctrl0 = chv_readl(pctrl, desc->number, CHV_PADCTRL0); + ctx->padctrl0 &= ~CHV_PADCTRL0_GPIORXSTATE; + + ctx->padctrl1 = chv_readl(pctrl, desc->number, CHV_PADCTRL1); + } + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} + +static int chv_pinctrl_resume_noirq(struct device *dev) +{ + struct intel_pinctrl *pctrl = dev_get_drvdata(dev); + struct intel_community_context *cctx = &pctrl->context.communities[0]; + unsigned long flags; + int i; + + raw_spin_lock_irqsave(&chv_lock, flags); + + /* + * Mask all interrupts before restoring per-pin configuration + * registers because we don't know in which state BIOS left them + * upon exiting suspend. + */ + chv_pctrl_writel(pctrl, CHV_INTMASK, 0x0000); + + for (i = 0; i < pctrl->soc->npins; i++) { + const struct pinctrl_pin_desc *desc; + struct intel_pad_context *ctx = &pctrl->context.pads[i]; + u32 val; + + desc = &pctrl->soc->pins[i]; + if (chv_pad_locked(pctrl, desc->number)) + continue; + + /* Only restore if our saved state differs from the current */ + val = chv_readl(pctrl, desc->number, CHV_PADCTRL0); + val &= ~CHV_PADCTRL0_GPIORXSTATE; + if (ctx->padctrl0 != val) { + chv_writel(pctrl, desc->number, CHV_PADCTRL0, ctx->padctrl0); + dev_dbg(dev, "restored pin %2u ctrl0 0x%08x\n", desc->number, + chv_readl(pctrl, desc->number, CHV_PADCTRL0)); + } + + val = chv_readl(pctrl, desc->number, CHV_PADCTRL1); + if (ctx->padctrl1 != val) { + chv_writel(pctrl, desc->number, CHV_PADCTRL1, ctx->padctrl1); + dev_dbg(dev, "restored pin %2u ctrl1 0x%08x\n", desc->number, + chv_readl(pctrl, desc->number, CHV_PADCTRL1)); + } + } + + /* + * Now that all pins are restored to known state, we can restore + * the interrupt mask register as well. + */ + chv_pctrl_writel(pctrl, CHV_INTSTAT, 0xffff); + chv_pctrl_writel(pctrl, CHV_INTMASK, cctx->saved_intmask); + + raw_spin_unlock_irqrestore(&chv_lock, flags); + + return 0; +} +#endif + +static const struct dev_pm_ops chv_pinctrl_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend_noirq, + chv_pinctrl_resume_noirq) +}; + +static const struct acpi_device_id chv_pinctrl_acpi_match[] = { + { "INT33FF", (kernel_ulong_t)chv_soc_data }, + { } +}; +MODULE_DEVICE_TABLE(acpi, chv_pinctrl_acpi_match); + +static struct platform_driver chv_pinctrl_driver = { + .probe = chv_pinctrl_probe, + .remove = chv_pinctrl_remove, + .driver = { + .name = "cherryview-pinctrl", + .pm = &chv_pinctrl_pm_ops, + .acpi_match_table = chv_pinctrl_acpi_match, + }, +}; + +static int __init chv_pinctrl_init(void) +{ + return platform_driver_register(&chv_pinctrl_driver); +} +subsys_initcall(chv_pinctrl_init); + +static void __exit chv_pinctrl_exit(void) +{ + platform_driver_unregister(&chv_pinctrl_driver); +} +module_exit(chv_pinctrl_exit); + +MODULE_AUTHOR("Mika Westerberg <mika.westerberg@linux.intel.com>"); +MODULE_DESCRIPTION("Intel Cherryview/Braswell pinctrl driver"); +MODULE_LICENSE("GPL v2"); |