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ubuntu-linux-kernel/drivers/pinctrl/intel/pinctrl-cherryview.c

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2024-04-01 15:06:58 +00:00
/*
* Cherryview/Braswell pinctrl driver
*
* Copyright (C) 2014, 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>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/dmi.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/types.h>
#include <linux/gpio.h>
#include <linux/gpio/driver.h>
#include <linux/acpi.h>
#include <linux/pinctrl/pinctrl.h>
#include <linux/pinctrl/pinmux.h>
#include <linux/pinctrl/pinconf.h>
#include <linux/pinctrl/pinconf-generic.h>
#include <linux/platform_device.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 (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
#define CHV_PADCTRL0_TERM_UP BIT(23)
#define CHV_PADCTRL0_TERM_SHIFT 20
#define CHV_PADCTRL0_TERM_MASK (7 << CHV_PADCTRL0_TERM_SHIFT)
#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 (0xf << CHV_PADCTRL0_PMODE_SHIFT)
#define CHV_PADCTRL0_GPIOEN BIT(15)
#define CHV_PADCTRL0_GPIOCFG_SHIFT 8
#define CHV_PADCTRL0_GPIOCFG_MASK (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
#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 (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
#define CHV_PADCTRL1_INVRXTX_TXENABLE (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
#define CHV_PADCTRL1_ODEN BIT(3)
#define CHV_PADCTRL1_INVRXTX_RXDATA (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
#define CHV_PADCTRL1_INTWAKECFG_MASK 7
#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 chv_alternate_function - A per group or per pin alternate function
* @pin: Pin number (only used in per pin configs)
* @mode: Mode the pin should be set in
* @invert_oe: Invert OE for this pin
*/
struct chv_alternate_function {
unsigned pin;
u8 mode;
bool invert_oe;
};
/**
* struct chv_pincgroup - describes a CHV pin group
* @name: Name of the group
* @pins: An array of pins in this group
* @npins: Number of pins in this group
* @altfunc: Alternate function applied to all pins in this group
* @overrides: Alternate function override per pin or %NULL if not used
* @noverrides: Number of per pin alternate function overrides if
* @overrides != NULL.
*/
struct chv_pingroup {
const char *name;
const unsigned *pins;
size_t npins;
struct chv_alternate_function altfunc;
const struct chv_alternate_function *overrides;
size_t noverrides;
};
/**
* struct chv_function - A CHV pinmux function
* @name: Name of the function
* @groups: An array of groups for this function
* @ngroups: Number of groups in @groups
*/
struct chv_function {
const char *name;
const char * const *groups;
size_t ngroups;
};
/**
* struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
* @base: Start pin number
* @npins: Number of pins in this range
*/
struct chv_gpio_pinrange {
unsigned base;
unsigned npins;
};
/**
* struct chv_community - A community specific configuration
* @uid: ACPI _UID used to match the community
* @pins: All pins in this community
* @npins: Number of pins
* @groups: All groups in this community
* @ngroups: Number of groups
* @functions: All functions in this community
* @nfunctions: Number of functions
* @ngpios: Number of GPIOs in this community
* @gpio_ranges: An array of GPIO ranges in this community
* @ngpio_ranges: Number of GPIO ranges
* @ngpios: Total number of GPIOs in this community
* @nirqs: Total number of IRQs this community can generate
*/
struct chv_community {
const char *uid;
const struct pinctrl_pin_desc *pins;
size_t npins;
const struct chv_pingroup *groups;
size_t ngroups;
const struct chv_function *functions;
size_t nfunctions;
const struct chv_gpio_pinrange *gpio_ranges;
size_t ngpio_ranges;
size_t ngpios;
size_t nirqs;
acpi_adr_space_type acpi_space_id;
};
struct chv_pin_context {
u32 padctrl0;
u32 padctrl1;
};
/**
* struct chv_pinctrl - CHV pinctrl private structure
* @dev: Pointer to the parent device
* @pctldesc: Pin controller description
* @pctldev: Pointer to the pin controller device
* @chip: GPIO chip in this pin controller
* @regs: MMIO registers
* @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
* offset (in GPIO number space)
* @community: Community this pinctrl instance represents
*
* The first group in @groups is expected to contain all pins that can be
* used as GPIOs.
*/
struct chv_pinctrl {
struct device *dev;
struct pinctrl_desc pctldesc;
struct pinctrl_dev *pctldev;
struct gpio_chip chip;
void __iomem *regs;
unsigned intr_lines[16];
const struct chv_community *community;
u32 saved_intmask;
struct chv_pin_context *saved_pin_context;
};
#define ALTERNATE_FUNCTION(p, m, i) \
{ \
.pin = (p), \
.mode = (m), \
.invert_oe = (i), \
}
#define PIN_GROUP(n, p, m, i) \
{ \
.name = (n), \
.pins = (p), \
.npins = ARRAY_SIZE((p)), \
.altfunc.mode = (m), \
.altfunc.invert_oe = (i), \
}
#define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o) \
{ \
.name = (n), \
.pins = (p), \
.npins = ARRAY_SIZE((p)), \
.altfunc.mode = (m), \
.altfunc.invert_oe = (i), \
.overrides = (o), \
.noverrides = ARRAY_SIZE((o)), \
}
#define FUNCTION(n, g) \
{ \
.name = (n), \
.groups = (g), \
.ngroups = ARRAY_SIZE((g)), \
}
#define GPIO_PINRANGE(start, end) \
{ \
.base = (start), \
.npins = (end) - (start) + 1, \
}
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_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
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_smbus_pins[] = { 79, 81, 82 };
static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
/* LPE I2S TXD pins need to have invert_oe set */
static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
ALTERNATE_FUNCTION(30, 1, true),
ALTERNATE_FUNCTION(34, 1, true),
ALTERNATE_FUNCTION(97, 1, true),
};
/*
* Two spi3 chipselects are available in different mode than the main spi3
* functionality, which is using mode 1.
*/
static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
ALTERNATE_FUNCTION(76, 3, false),
ALTERNATE_FUNCTION(80, 3, false),
};
static const struct chv_pingroup southwest_groups[] = {
PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false),
PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false),
PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false),
PIN_GROUP("hda_grp", southwest_hda_pins, 2, false),
PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true),
PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true),
PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true),
PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true),
PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true),
PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true),
PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true),
PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
southwest_lpe_altfuncs),
PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
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 chv_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 chv_gpio_pinrange southwest_gpio_ranges[] = {
GPIO_PINRANGE(0, 7),
GPIO_PINRANGE(15, 22),
GPIO_PINRANGE(30, 37),
GPIO_PINRANGE(45, 52),
GPIO_PINRANGE(60, 67),
GPIO_PINRANGE(75, 82),
GPIO_PINRANGE(90, 97),
};
static const struct chv_community southwest_community = {
.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),
.gpio_ranges = southwest_gpio_ranges,
.ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
.ngpios = ARRAY_SIZE(southwest_pins),
/*
* Southwest community can benerate GPIO interrupts only for the
* first 8 interrupts. The upper half (8-15) can only be used to
* trigger GPEs.
*/
.nirqs = 8,
.acpi_space_id = 0x91,
};
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 chv_gpio_pinrange north_gpio_ranges[] = {
GPIO_PINRANGE(0, 8),
GPIO_PINRANGE(15, 27),
GPIO_PINRANGE(30, 41),
GPIO_PINRANGE(45, 56),
GPIO_PINRANGE(60, 72),
};
static const struct chv_community north_community = {
.uid = "2",
.pins = north_pins,
.npins = ARRAY_SIZE(north_pins),
.gpio_ranges = north_gpio_ranges,
.ngpio_ranges = ARRAY_SIZE(north_gpio_ranges),
.ngpios = ARRAY_SIZE(north_pins),
/*
* North community can generate GPIO interrupts only for the first
* 8 interrupts. The upper half (8-15) can only be used to trigger
* GPEs.
*/
.nirqs = 8,
.acpi_space_id = 0x92,
};
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 chv_gpio_pinrange east_gpio_ranges[] = {
GPIO_PINRANGE(0, 11),
GPIO_PINRANGE(15, 26),
};
static const struct chv_community east_community = {
.uid = "3",
.pins = east_pins,
.npins = ARRAY_SIZE(east_pins),
.gpio_ranges = east_gpio_ranges,
.ngpio_ranges = ARRAY_SIZE(east_gpio_ranges),
.ngpios = ARRAY_SIZE(east_pins),
.nirqs = 16,
.acpi_space_id = 0x93,
};
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 chv_pingroup southeast_groups[] = {
PIN_GROUP("pwm0_grp", southeast_pwm0_pins, 1, false),
PIN_GROUP("pwm1_grp", southeast_pwm1_pins, 1, false),
PIN_GROUP("sdmmc1_grp", southeast_sdmmc1_pins, 1, false),
PIN_GROUP("sdmmc2_grp", southeast_sdmmc2_pins, 1, false),
PIN_GROUP("sdmmc3_grp", southeast_sdmmc3_pins, 1, false),
PIN_GROUP("spi1_grp", southeast_spi1_pins, 1, false),
PIN_GROUP("spi2_grp", southeast_spi2_pins, 4, false),
};
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 chv_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 chv_gpio_pinrange southeast_gpio_ranges[] = {
GPIO_PINRANGE(0, 7),
GPIO_PINRANGE(15, 26),
GPIO_PINRANGE(30, 35),
GPIO_PINRANGE(45, 52),
GPIO_PINRANGE(60, 69),
GPIO_PINRANGE(75, 85),
};
static const struct chv_community southeast_community = {
.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),
.gpio_ranges = southeast_gpio_ranges,
.ngpio_ranges = ARRAY_SIZE(southeast_gpio_ranges),
.ngpios = ARRAY_SIZE(southeast_pins),
.nirqs = 16,
.acpi_space_id = 0x94,
};
static const struct chv_community *chv_communities[] = {
&southwest_community,
&north_community,
&east_community,
&southeast_community,
};
/*
* 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 void __iomem *chv_padreg(struct chv_pinctrl *pctrl, unsigned offset,
unsigned reg)
{
unsigned family_no = offset / MAX_FAMILY_PAD_GPIO_NO;
unsigned pad_no = offset % MAX_FAMILY_PAD_GPIO_NO;
offset = FAMILY_PAD_REGS_OFF + FAMILY_PAD_REGS_SIZE * family_no +
GPIO_REGS_SIZE * pad_no;
return pctrl->regs + offset + reg;
}
static void chv_writel(u32 value, void __iomem *reg)
{
writel(value, reg);
/* simple readback to confirm the bus transferring done */
readl(reg);
}
/* When Pad Cfg is locked, driver can only change GPIOTXState or GPIORXState */
static bool chv_pad_locked(struct chv_pinctrl *pctrl, unsigned offset)
{
void __iomem *reg;
reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
return readl(reg) & CHV_PADCTRL1_CFGLOCK;
}
static int chv_get_groups_count(struct pinctrl_dev *pctldev)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->community->ngroups;
}
static const char *chv_get_group_name(struct pinctrl_dev *pctldev,
unsigned group)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->community->groups[group].name;
}
static int chv_get_group_pins(struct pinctrl_dev *pctldev, unsigned group,
const unsigned **pins, unsigned *npins)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
*pins = pctrl->community->groups[group].pins;
*npins = pctrl->community->groups[group].npins;
return 0;
}
static void chv_pin_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
unsigned offset)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
unsigned long flags;
u32 ctrl0, ctrl1;
bool locked;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl0 = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
ctrl1 = readl(chv_padreg(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 chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->community->nfunctions;
}
static const char *chv_get_function_name(struct pinctrl_dev *pctldev,
unsigned function)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
return pctrl->community->functions[function].name;
}
static int chv_get_function_groups(struct pinctrl_dev *pctldev,
unsigned function,
const char * const **groups,
unsigned * const ngroups)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
*groups = pctrl->community->functions[function].groups;
*ngroups = pctrl->community->functions[function].ngroups;
return 0;
}
static int chv_pinmux_set_mux(struct pinctrl_dev *pctldev, unsigned function,
unsigned group)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
const struct chv_pingroup *grp;
unsigned long flags;
int i;
grp = &pctrl->community->groups[group];
raw_spin_lock_irqsave(&chv_lock, flags);
/* Check first that the pad is not locked */
for (i = 0; i < grp->npins; i++) {
if (chv_pad_locked(pctrl, grp->pins[i])) {
dev_warn(pctrl->dev, "unable to set mode for locked pin %u\n",
grp->pins[i]);
raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EBUSY;
}
}
for (i = 0; i < grp->npins; i++) {
const struct chv_alternate_function *altfunc = &grp->altfunc;
int pin = grp->pins[i];
void __iomem *reg;
u32 value;
/* Check if there is pin-specific config */
if (grp->overrides) {
int j;
for (j = 0; j < grp->noverrides; j++) {
if (grp->overrides[j].pin == pin) {
altfunc = &grp->overrides[j];
break;
}
}
}
reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
value = readl(reg);
/* Disable GPIO mode */
value &= ~CHV_PADCTRL0_GPIOEN;
/* Set to desired mode */
value &= ~CHV_PADCTRL0_PMODE_MASK;
value |= altfunc->mode << CHV_PADCTRL0_PMODE_SHIFT;
chv_writel(value, reg);
/* Update for invert_oe */
reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
value = readl(reg) & ~CHV_PADCTRL1_INVRXTX_MASK;
if (altfunc->invert_oe)
value |= CHV_PADCTRL1_INVRXTX_TXENABLE;
chv_writel(value, reg);
dev_dbg(pctrl->dev, "configured pin %u mode %u OE %sinverted\n",
pin, altfunc->mode, altfunc->invert_oe ? "" : "not ");
}
raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
static int chv_gpio_request_enable(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
unsigned long flags;
void __iomem *reg;
u32 value;
raw_spin_lock_irqsave(&chv_lock, flags);
if (chv_pad_locked(pctrl, offset)) {
value = readl(chv_padreg(pctrl, offset, CHV_PADCTRL0));
if (!(value & CHV_PADCTRL0_GPIOEN)) {
/* Locked so cannot enable */
raw_spin_unlock_irqrestore(&chv_lock, flags);
return -EBUSY;
}
} else {
int i;
/* Reset the interrupt mapping */
for (i = 0; i < ARRAY_SIZE(pctrl->intr_lines); i++) {
if (pctrl->intr_lines[i] == offset) {
pctrl->intr_lines[i] = 0;
break;
}
}
/* Disable interrupt generation */
reg = chv_padreg(pctrl, offset, CHV_PADCTRL1);
value = readl(reg);
value &= ~CHV_PADCTRL1_INTWAKECFG_MASK;
value &= ~CHV_PADCTRL1_INVRXTX_MASK;
chv_writel(value, reg);
reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
value = readl(reg);
/*
* 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(value, reg);
}
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 offset)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
unsigned long flags;
void __iomem *reg;
u32 value;
raw_spin_lock_irqsave(&chv_lock, flags);
reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
value = readl(reg) & ~CHV_PADCTRL0_GPIOEN;
chv_writel(value, reg);
raw_spin_unlock_irqrestore(&chv_lock, flags);
}
static int chv_gpio_set_direction(struct pinctrl_dev *pctldev,
struct pinctrl_gpio_range *range,
unsigned offset, bool input)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
void __iomem *reg = chv_padreg(pctrl, offset, CHV_PADCTRL0);
unsigned long flags;
u32 ctrl0;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl0 = readl(reg) & ~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(ctrl0, reg);
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 pin,
unsigned long *config)
{
struct chv_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 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
ctrl1 = readl(chv_padreg(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_DRIVE_OPEN_DRAIN:
if (!(ctrl1 & CHV_PADCTRL1_ODEN))
return -EINVAL;
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;
}
default:
return -ENOTSUPP;
}
*config = pinconf_to_config_packed(param, arg);
return 0;
}
static int chv_config_set_pull(struct chv_pinctrl *pctrl, unsigned pin,
enum pin_config_param param, u32 arg)
{
void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
unsigned long flags;
u32 ctrl0, pull;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl0 = readl(reg);
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(ctrl0, reg);
raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
static int chv_config_set_oden(struct chv_pinctrl *pctrl, unsigned int pin,
bool enable)
{
void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
unsigned long flags;
u32 ctrl1;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl1 = readl(reg);
if (enable)
ctrl1 |= CHV_PADCTRL1_ODEN;
else
ctrl1 &= ~CHV_PADCTRL1_ODEN;
chv_writel(ctrl1, reg);
raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
static int chv_config_set(struct pinctrl_dev *pctldev, unsigned pin,
unsigned long *configs, unsigned nconfigs)
{
struct chv_pinctrl *pctrl = pinctrl_dev_get_drvdata(pctldev);
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(pctrl->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 unsigned chv_gpio_offset_to_pin(struct chv_pinctrl *pctrl,
unsigned offset)
{
return pctrl->community->pins[offset].number;
}
static int chv_gpio_get(struct gpio_chip *chip, unsigned offset)
{
struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
int pin = chv_gpio_offset_to_pin(pctrl, offset);
unsigned long flags;
u32 ctrl0, cfg;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl0 = readl(chv_padreg(pctrl, pin, 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 offset, int value)
{
struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
unsigned pin = chv_gpio_offset_to_pin(pctrl, offset);
unsigned long flags;
void __iomem *reg;
u32 ctrl0;
raw_spin_lock_irqsave(&chv_lock, flags);
reg = chv_padreg(pctrl, pin, CHV_PADCTRL0);
ctrl0 = readl(reg);
if (value)
ctrl0 |= CHV_PADCTRL0_GPIOTXSTATE;
else
ctrl0 &= ~CHV_PADCTRL0_GPIOTXSTATE;
chv_writel(ctrl0, reg);
raw_spin_unlock_irqrestore(&chv_lock, flags);
}
static int chv_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
{
struct chv_pinctrl *pctrl = gpiochip_get_data(chip);
unsigned pin = chv_gpio_offset_to_pin(pctrl, offset);
u32 ctrl0, direction;
unsigned long flags;
raw_spin_lock_irqsave(&chv_lock, flags);
ctrl0 = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
raw_spin_unlock_irqrestore(&chv_lock, flags);
direction = ctrl0 & CHV_PADCTRL0_GPIOCFG_MASK;
direction >>= CHV_PADCTRL0_GPIOCFG_SHIFT;
return direction != CHV_PADCTRL0_GPIOCFG_GPO;
}
static int chv_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
{
return pinctrl_gpio_direction_input(chip->base + offset);
}
static int chv_gpio_direction_output(struct gpio_chip *chip, unsigned 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 chv_pinctrl *pctrl = gpiochip_get_data(gc);
int pin = chv_gpio_offset_to_pin(pctrl, irqd_to_hwirq(d));
u32 intr_line;
raw_spin_lock(&chv_lock);
intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
intr_line &= CHV_PADCTRL0_INTSEL_MASK;
intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
chv_writel(BIT(intr_line), pctrl->regs + CHV_INTSTAT);
raw_spin_unlock(&chv_lock);
}
static void chv_gpio_irq_mask_unmask(struct irq_data *d, bool mask)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
int pin = chv_gpio_offset_to_pin(pctrl, irqd_to_hwirq(d));
u32 value, intr_line;
unsigned long flags;
raw_spin_lock_irqsave(&chv_lock, flags);
intr_line = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
intr_line &= CHV_PADCTRL0_INTSEL_MASK;
intr_line >>= CHV_PADCTRL0_INTSEL_SHIFT;
value = readl(pctrl->regs + CHV_INTMASK);
if (mask)
value &= ~BIT(intr_line);
else
value |= BIT(intr_line);
chv_writel(value, pctrl->regs + CHV_INTMASK);
raw_spin_unlock_irqrestore(&chv_lock, flags);
}
static void chv_gpio_irq_mask(struct irq_data *d)
{
chv_gpio_irq_mask_unmask(d, true);
}
static void chv_gpio_irq_unmask(struct irq_data *d)
{
chv_gpio_irq_mask_unmask(d, 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 chv_pinctrl *pctrl = gpiochip_get_data(gc);
unsigned offset = irqd_to_hwirq(d);
int pin = chv_gpio_offset_to_pin(pctrl, offset);
irq_flow_handler_t handler;
unsigned long flags;
u32 intsel, value;
raw_spin_lock_irqsave(&chv_lock, flags);
intsel = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
intsel &= CHV_PADCTRL0_INTSEL_MASK;
intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL1));
if (value & CHV_PADCTRL1_INTWAKECFG_LEVEL)
handler = handle_level_irq;
else
handler = handle_edge_irq;
if (!pctrl->intr_lines[intsel]) {
irq_set_handler_locked(d, handler);
pctrl->intr_lines[intsel] = offset;
}
raw_spin_unlock_irqrestore(&chv_lock, flags);
}
chv_gpio_irq_unmask(d);
return 0;
}
static int chv_gpio_irq_type(struct irq_data *d, unsigned type)
{
struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
unsigned offset = irqd_to_hwirq(d);
int pin = chv_gpio_offset_to_pin(pctrl, offset);
unsigned long flags;
u32 value;
raw_spin_lock_irqsave(&chv_lock, flags);
/*
* 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, pin)) {
void __iomem *reg = chv_padreg(pctrl, pin, CHV_PADCTRL1);
value = readl(reg);
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(value, reg);
}
value = readl(chv_padreg(pctrl, pin, CHV_PADCTRL0));
value &= CHV_PADCTRL0_INTSEL_MASK;
value >>= CHV_PADCTRL0_INTSEL_SHIFT;
pctrl->intr_lines[value] = offset;
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);
raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
static struct irq_chip chv_gpio_irqchip = {
.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,
};
static void chv_gpio_irq_handler(struct irq_desc *desc)
{
struct gpio_chip *gc = irq_desc_get_handler_data(desc);
struct chv_pinctrl *pctrl = gpiochip_get_data(gc);
struct irq_chip *chip = irq_desc_get_chip(desc);
unsigned long pending;
u32 intr_line;
chained_irq_enter(chip, desc);
pending = readl(pctrl->regs + CHV_INTSTAT);
for_each_set_bit(intr_line, &pending, pctrl->community->nirqs) {
unsigned irq, offset;
offset = pctrl->intr_lines[intr_line];
irq = irq_find_mapping(gc->irq.domain, offset);
generic_handle_irq(irq);
}
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 int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
{
const struct chv_gpio_pinrange *range;
struct gpio_chip *chip = &pctrl->chip;
bool need_valid_mask = !dmi_check_system(chv_no_valid_mask);
int ret, i, offset;
int irq_base;
*chip = chv_gpio_chip;
chip->ngpio = pctrl->community->ngpios;
chip->label = dev_name(pctrl->dev);
chip->parent = pctrl->dev;
chip->base = -1;
chip->irq.need_valid_mask = need_valid_mask;
ret = devm_gpiochip_add_data(pctrl->dev, chip, pctrl);
if (ret) {
dev_err(pctrl->dev, "Failed to register gpiochip\n");
return ret;
}
for (i = 0, offset = 0; i < pctrl->community->ngpio_ranges; i++) {
range = &pctrl->community->gpio_ranges[i];
ret = gpiochip_add_pin_range(chip, dev_name(pctrl->dev), offset,
range->base, range->npins);
if (ret) {
dev_err(pctrl->dev, "failed to add GPIO pin range\n");
return ret;
}
offset += range->npins;
}
/* Do not add GPIOs that can only generate GPEs to the IRQ domain */
for (i = 0; i < pctrl->community->npins; i++) {
const struct pinctrl_pin_desc *desc;
u32 intsel;
desc = &pctrl->community->pins[i];
intsel = readl(chv_padreg(pctrl, desc->number, CHV_PADCTRL0));
intsel &= CHV_PADCTRL0_INTSEL_MASK;
intsel >>= CHV_PADCTRL0_INTSEL_SHIFT;
if (need_valid_mask && intsel >= pctrl->community->nirqs)
clear_bit(i, chip->irq.valid_mask);
}
/*
* 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 (!need_valid_mask) {
/*
* Mask all interrupts the community is able to generate
* but leave the ones that can only generate GPEs unmasked.
*/
chv_writel(GENMASK(31, pctrl->community->nirqs),
pctrl->regs + CHV_INTMASK);
}
/* Clear all interrupts */
chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
if (!need_valid_mask) {
irq_base = devm_irq_alloc_descs(pctrl->dev, -1, 0,
chip->ngpio, NUMA_NO_NODE);
if (irq_base < 0) {
dev_err(pctrl->dev, "Failed to allocate IRQ numbers\n");
return irq_base;
}
} else {
irq_base = 0;
}
ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, irq_base,
handle_bad_irq, IRQ_TYPE_NONE);
if (ret) {
dev_err(pctrl->dev, "failed to add IRQ chip\n");
return ret;
}
gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
chv_gpio_irq_handler);
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 chv_pinctrl *pctrl = region_context;
unsigned long flags;
acpi_status ret = AE_OK;
raw_spin_lock_irqsave(&chv_lock, flags);
if (function == ACPI_WRITE)
chv_writel((u32)(*value), pctrl->regs + (u32)address);
else if (function == ACPI_READ)
*value = readl(pctrl->regs + (u32)address);
else
ret = AE_BAD_PARAMETER;
raw_spin_unlock_irqrestore(&chv_lock, flags);
return ret;
}
static int chv_pinctrl_probe(struct platform_device *pdev)
{
struct chv_pinctrl *pctrl;
struct acpi_device *adev;
struct resource *res;
acpi_status status;
int ret, irq, i;
adev = ACPI_COMPANION(&pdev->dev);
if (!adev)
return -ENODEV;
pctrl = devm_kzalloc(&pdev->dev, sizeof(*pctrl), GFP_KERNEL);
if (!pctrl)
return -ENOMEM;
for (i = 0; i < ARRAY_SIZE(chv_communities); i++)
if (!strcmp(adev->pnp.unique_id, chv_communities[i]->uid)) {
pctrl->community = chv_communities[i];
break;
}
if (i == ARRAY_SIZE(chv_communities))
return -ENODEV;
pctrl->dev = &pdev->dev;
#ifdef CONFIG_PM_SLEEP
pctrl->saved_pin_context = devm_kcalloc(pctrl->dev,
pctrl->community->npins, sizeof(*pctrl->saved_pin_context),
GFP_KERNEL);
if (!pctrl->saved_pin_context)
return -ENOMEM;
#endif
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
pctrl->regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(pctrl->regs))
return PTR_ERR(pctrl->regs);
irq = platform_get_irq(pdev, 0);
if (irq < 0) {
dev_err(&pdev->dev, "failed to get interrupt number\n");
return irq;
}
pctrl->pctldesc = chv_pinctrl_desc;
pctrl->pctldesc.name = dev_name(&pdev->dev);
pctrl->pctldesc.pins = pctrl->community->pins;
pctrl->pctldesc.npins = pctrl->community->npins;
pctrl->pctldev = devm_pinctrl_register(&pdev->dev, &pctrl->pctldesc,
pctrl);
if (IS_ERR(pctrl->pctldev)) {
dev_err(&pdev->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(adev->handle,
pctrl->community->acpi_space_id,
chv_pinctrl_mmio_access_handler,
NULL, pctrl);
if (ACPI_FAILURE(status))
dev_err(&pdev->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 chv_pinctrl *pctrl = platform_get_drvdata(pdev);
acpi_remove_address_space_handler(ACPI_COMPANION(&pdev->dev),
pctrl->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 platform_device *pdev = to_platform_device(dev);
struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
unsigned long flags;
int i;
raw_spin_lock_irqsave(&chv_lock, flags);
pctrl->saved_intmask = readl(pctrl->regs + CHV_INTMASK);
for (i = 0; i < pctrl->community->npins; i++) {
const struct pinctrl_pin_desc *desc;
struct chv_pin_context *ctx;
void __iomem *reg;
desc = &pctrl->community->pins[i];
if (chv_pad_locked(pctrl, desc->number))
continue;
ctx = &pctrl->saved_pin_context[i];
reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
ctx->padctrl0 = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
ctx->padctrl1 = readl(reg);
}
raw_spin_unlock_irqrestore(&chv_lock, flags);
return 0;
}
static int chv_pinctrl_resume_noirq(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
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_writel(0, pctrl->regs + CHV_INTMASK);
for (i = 0; i < pctrl->community->npins; i++) {
const struct pinctrl_pin_desc *desc;
const struct chv_pin_context *ctx;
void __iomem *reg;
u32 val;
desc = &pctrl->community->pins[i];
if (chv_pad_locked(pctrl, desc->number))
continue;
ctx = &pctrl->saved_pin_context[i];
/* Only restore if our saved state differs from the current */
reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL0);
val = readl(reg) & ~CHV_PADCTRL0_GPIORXSTATE;
if (ctx->padctrl0 != val) {
chv_writel(ctx->padctrl0, reg);
dev_dbg(pctrl->dev, "restored pin %2u ctrl0 0x%08x\n",
desc->number, readl(reg));
}
reg = chv_padreg(pctrl, desc->number, CHV_PADCTRL1);
val = readl(reg);
if (ctx->padctrl1 != val) {
chv_writel(ctx->padctrl1, reg);
dev_dbg(pctrl->dev, "restored pin %2u ctrl1 0x%08x\n",
desc->number, readl(reg));
}
}
/*
* Now that all pins are restored to known state, we can restore
* the interrupt mask register as well.
*/
chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
chv_writel(pctrl->saved_intmask, pctrl->regs + CHV_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" },
{ }
};
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");