1756 lines
48 KiB
C
1756 lines
48 KiB
C
/*
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* Cherryview/Braswell pinctrl driver
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*
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* Copyright (C) 2014, Intel Corporation
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* Author: Mika Westerberg <mika.westerberg@linux.intel.com>
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*
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* This driver is based on the original Cherryview GPIO driver by
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* Ning Li <ning.li@intel.com>
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* Alan Cox <alan@linux.intel.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/types.h>
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#include <linux/gpio.h>
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#include <linux/gpio/driver.h>
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#include <linux/acpi.h>
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/pinctrl/pinmux.h>
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#include <linux/pinctrl/pinconf.h>
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#include <linux/pinctrl/pinconf-generic.h>
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#include <linux/platform_device.h>
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#define CHV_INTSTAT 0x300
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#define CHV_INTMASK 0x380
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#define FAMILY_PAD_REGS_OFF 0x4400
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#define FAMILY_PAD_REGS_SIZE 0x400
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#define MAX_FAMILY_PAD_GPIO_NO 15
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#define GPIO_REGS_SIZE 8
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#define CHV_PADCTRL0 0x000
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#define CHV_PADCTRL0_INTSEL_SHIFT 28
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#define CHV_PADCTRL0_INTSEL_MASK (0xf << CHV_PADCTRL0_INTSEL_SHIFT)
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#define CHV_PADCTRL0_TERM_UP BIT(23)
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#define CHV_PADCTRL0_TERM_SHIFT 20
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#define CHV_PADCTRL0_TERM_MASK (7 << CHV_PADCTRL0_TERM_SHIFT)
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#define CHV_PADCTRL0_TERM_20K 1
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#define CHV_PADCTRL0_TERM_5K 2
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#define CHV_PADCTRL0_TERM_1K 4
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#define CHV_PADCTRL0_PMODE_SHIFT 16
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#define CHV_PADCTRL0_PMODE_MASK (0xf << CHV_PADCTRL0_PMODE_SHIFT)
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#define CHV_PADCTRL0_GPIOEN BIT(15)
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#define CHV_PADCTRL0_GPIOCFG_SHIFT 8
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#define CHV_PADCTRL0_GPIOCFG_MASK (7 << CHV_PADCTRL0_GPIOCFG_SHIFT)
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#define CHV_PADCTRL0_GPIOCFG_GPIO 0
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#define CHV_PADCTRL0_GPIOCFG_GPO 1
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#define CHV_PADCTRL0_GPIOCFG_GPI 2
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#define CHV_PADCTRL0_GPIOCFG_HIZ 3
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#define CHV_PADCTRL0_GPIOTXSTATE BIT(1)
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#define CHV_PADCTRL0_GPIORXSTATE BIT(0)
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#define CHV_PADCTRL1 0x004
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#define CHV_PADCTRL1_CFGLOCK BIT(31)
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#define CHV_PADCTRL1_INVRXTX_SHIFT 4
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#define CHV_PADCTRL1_INVRXTX_MASK (0xf << CHV_PADCTRL1_INVRXTX_SHIFT)
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#define CHV_PADCTRL1_INVRXTX_TXENABLE (2 << CHV_PADCTRL1_INVRXTX_SHIFT)
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#define CHV_PADCTRL1_ODEN BIT(3)
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#define CHV_PADCTRL1_INVRXTX_RXDATA (4 << CHV_PADCTRL1_INVRXTX_SHIFT)
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#define CHV_PADCTRL1_INTWAKECFG_MASK 7
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#define CHV_PADCTRL1_INTWAKECFG_FALLING 1
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#define CHV_PADCTRL1_INTWAKECFG_RISING 2
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#define CHV_PADCTRL1_INTWAKECFG_BOTH 3
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#define CHV_PADCTRL1_INTWAKECFG_LEVEL 4
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/**
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* struct chv_alternate_function - A per group or per pin alternate function
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* @pin: Pin number (only used in per pin configs)
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* @mode: Mode the pin should be set in
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* @invert_oe: Invert OE for this pin
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*/
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struct chv_alternate_function {
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unsigned pin;
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u8 mode;
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bool invert_oe;
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};
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/**
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* struct chv_pincgroup - describes a CHV pin group
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* @name: Name of the group
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* @pins: An array of pins in this group
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* @npins: Number of pins in this group
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* @altfunc: Alternate function applied to all pins in this group
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* @overrides: Alternate function override per pin or %NULL if not used
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* @noverrides: Number of per pin alternate function overrides if
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* @overrides != NULL.
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*/
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struct chv_pingroup {
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const char *name;
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const unsigned *pins;
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size_t npins;
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struct chv_alternate_function altfunc;
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const struct chv_alternate_function *overrides;
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size_t noverrides;
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};
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/**
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* struct chv_function - A CHV pinmux function
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* @name: Name of the function
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* @groups: An array of groups for this function
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* @ngroups: Number of groups in @groups
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*/
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struct chv_function {
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const char *name;
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const char * const *groups;
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size_t ngroups;
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};
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/**
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* struct chv_gpio_pinrange - A range of pins that can be used as GPIOs
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* @base: Start pin number
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* @npins: Number of pins in this range
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*/
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struct chv_gpio_pinrange {
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unsigned base;
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unsigned npins;
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};
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/**
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* struct chv_community - A community specific configuration
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* @uid: ACPI _UID used to match the community
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* @pins: All pins in this community
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* @npins: Number of pins
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* @groups: All groups in this community
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* @ngroups: Number of groups
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* @functions: All functions in this community
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* @nfunctions: Number of functions
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* @ngpios: Number of GPIOs in this community
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* @gpio_ranges: An array of GPIO ranges in this community
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* @ngpio_ranges: Number of GPIO ranges
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* @ngpios: Total number of GPIOs in this community
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*/
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struct chv_community {
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const char *uid;
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const struct pinctrl_pin_desc *pins;
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size_t npins;
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const struct chv_pingroup *groups;
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size_t ngroups;
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const struct chv_function *functions;
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size_t nfunctions;
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const struct chv_gpio_pinrange *gpio_ranges;
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size_t ngpio_ranges;
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size_t ngpios;
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};
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struct chv_pin_context {
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u32 padctrl0;
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u32 padctrl1;
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};
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/**
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* struct chv_pinctrl - CHV pinctrl private structure
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* @dev: Pointer to the parent device
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* @pctldesc: Pin controller description
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* @pctldev: Pointer to the pin controller device
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* @chip: GPIO chip in this pin controller
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* @regs: MMIO registers
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* @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
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* offset (in GPIO number space)
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* @community: Community this pinctrl instance represents
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*
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* The first group in @groups is expected to contain all pins that can be
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* used as GPIOs.
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*/
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struct chv_pinctrl {
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struct device *dev;
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struct pinctrl_desc pctldesc;
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struct pinctrl_dev *pctldev;
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struct gpio_chip chip;
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void __iomem *regs;
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unsigned intr_lines[16];
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const struct chv_community *community;
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u32 saved_intmask;
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struct chv_pin_context *saved_pin_context;
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};
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#define ALTERNATE_FUNCTION(p, m, i) \
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{ \
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.pin = (p), \
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.mode = (m), \
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.invert_oe = (i), \
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}
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#define PIN_GROUP(n, p, m, i) \
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{ \
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.name = (n), \
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.pins = (p), \
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.npins = ARRAY_SIZE((p)), \
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.altfunc.mode = (m), \
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.altfunc.invert_oe = (i), \
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}
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#define PIN_GROUP_WITH_OVERRIDE(n, p, m, i, o) \
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{ \
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.name = (n), \
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.pins = (p), \
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.npins = ARRAY_SIZE((p)), \
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.altfunc.mode = (m), \
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.altfunc.invert_oe = (i), \
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.overrides = (o), \
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.noverrides = ARRAY_SIZE((o)), \
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}
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#define FUNCTION(n, g) \
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{ \
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.name = (n), \
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.groups = (g), \
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.ngroups = ARRAY_SIZE((g)), \
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}
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#define GPIO_PINRANGE(start, end) \
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{ \
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.base = (start), \
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.npins = (end) - (start) + 1, \
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}
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static const struct pinctrl_pin_desc southwest_pins[] = {
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PINCTRL_PIN(0, "FST_SPI_D2"),
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PINCTRL_PIN(1, "FST_SPI_D0"),
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PINCTRL_PIN(2, "FST_SPI_CLK"),
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PINCTRL_PIN(3, "FST_SPI_D3"),
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PINCTRL_PIN(4, "FST_SPI_CS1_B"),
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PINCTRL_PIN(5, "FST_SPI_D1"),
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PINCTRL_PIN(6, "FST_SPI_CS0_B"),
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PINCTRL_PIN(7, "FST_SPI_CS2_B"),
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PINCTRL_PIN(15, "UART1_RTS_B"),
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PINCTRL_PIN(16, "UART1_RXD"),
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PINCTRL_PIN(17, "UART2_RXD"),
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PINCTRL_PIN(18, "UART1_CTS_B"),
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PINCTRL_PIN(19, "UART2_RTS_B"),
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PINCTRL_PIN(20, "UART1_TXD"),
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PINCTRL_PIN(21, "UART2_TXD"),
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PINCTRL_PIN(22, "UART2_CTS_B"),
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PINCTRL_PIN(30, "MF_HDA_CLK"),
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PINCTRL_PIN(31, "MF_HDA_RSTB"),
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PINCTRL_PIN(32, "MF_HDA_SDIO"),
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PINCTRL_PIN(33, "MF_HDA_SDO"),
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PINCTRL_PIN(34, "MF_HDA_DOCKRSTB"),
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PINCTRL_PIN(35, "MF_HDA_SYNC"),
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PINCTRL_PIN(36, "MF_HDA_SDI1"),
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PINCTRL_PIN(37, "MF_HDA_DOCKENB"),
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PINCTRL_PIN(45, "I2C5_SDA"),
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PINCTRL_PIN(46, "I2C4_SDA"),
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PINCTRL_PIN(47, "I2C6_SDA"),
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PINCTRL_PIN(48, "I2C5_SCL"),
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PINCTRL_PIN(49, "I2C_NFC_SDA"),
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PINCTRL_PIN(50, "I2C4_SCL"),
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PINCTRL_PIN(51, "I2C6_SCL"),
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PINCTRL_PIN(52, "I2C_NFC_SCL"),
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PINCTRL_PIN(60, "I2C1_SDA"),
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PINCTRL_PIN(61, "I2C0_SDA"),
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PINCTRL_PIN(62, "I2C2_SDA"),
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PINCTRL_PIN(63, "I2C1_SCL"),
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PINCTRL_PIN(64, "I2C3_SDA"),
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PINCTRL_PIN(65, "I2C0_SCL"),
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PINCTRL_PIN(66, "I2C2_SCL"),
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PINCTRL_PIN(67, "I2C3_SCL"),
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PINCTRL_PIN(75, "SATA_GP0"),
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PINCTRL_PIN(76, "SATA_GP1"),
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PINCTRL_PIN(77, "SATA_LEDN"),
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PINCTRL_PIN(78, "SATA_GP2"),
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PINCTRL_PIN(79, "MF_SMB_ALERTB"),
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PINCTRL_PIN(80, "SATA_GP3"),
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PINCTRL_PIN(81, "MF_SMB_CLK"),
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PINCTRL_PIN(82, "MF_SMB_DATA"),
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PINCTRL_PIN(90, "PCIE_CLKREQ0B"),
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PINCTRL_PIN(91, "PCIE_CLKREQ1B"),
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PINCTRL_PIN(92, "GP_SSP_2_CLK"),
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PINCTRL_PIN(93, "PCIE_CLKREQ2B"),
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PINCTRL_PIN(94, "GP_SSP_2_RXD"),
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PINCTRL_PIN(95, "PCIE_CLKREQ3B"),
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PINCTRL_PIN(96, "GP_SSP_2_FS"),
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PINCTRL_PIN(97, "GP_SSP_2_TXD"),
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};
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static const unsigned southwest_fspi_pins[] = { 0, 1, 2, 3, 4, 5, 6, 7 };
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static const unsigned southwest_uart0_pins[] = { 16, 20 };
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static const unsigned southwest_uart1_pins[] = { 15, 16, 18, 20 };
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static const unsigned southwest_uart2_pins[] = { 17, 19, 21, 22 };
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static const unsigned southwest_i2c0_pins[] = { 61, 65 };
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static const unsigned southwest_hda_pins[] = { 30, 31, 32, 33, 34, 35, 36, 37 };
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static const unsigned southwest_lpe_pins[] = {
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30, 31, 32, 33, 34, 35, 36, 37, 92, 94, 96, 97,
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};
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static const unsigned southwest_i2c1_pins[] = { 60, 63 };
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static const unsigned southwest_i2c2_pins[] = { 62, 66 };
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static const unsigned southwest_i2c3_pins[] = { 64, 67 };
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static const unsigned southwest_i2c4_pins[] = { 46, 50 };
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static const unsigned southwest_i2c5_pins[] = { 45, 48 };
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static const unsigned southwest_i2c6_pins[] = { 47, 51 };
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static const unsigned southwest_i2c_nfc_pins[] = { 49, 52 };
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static const unsigned southwest_smbus_pins[] = { 79, 81, 82 };
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static const unsigned southwest_spi3_pins[] = { 76, 79, 80, 81, 82 };
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/* LPE I2S TXD pins need to have invert_oe set */
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static const struct chv_alternate_function southwest_lpe_altfuncs[] = {
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ALTERNATE_FUNCTION(30, 1, true),
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ALTERNATE_FUNCTION(34, 1, true),
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ALTERNATE_FUNCTION(97, 1, true),
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};
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/*
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* Two spi3 chipselects are available in different mode than the main spi3
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* functionality, which is using mode 1.
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*/
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static const struct chv_alternate_function southwest_spi3_altfuncs[] = {
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ALTERNATE_FUNCTION(76, 3, false),
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ALTERNATE_FUNCTION(80, 3, false),
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};
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static const struct chv_pingroup southwest_groups[] = {
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PIN_GROUP("uart0_grp", southwest_uart0_pins, 2, false),
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PIN_GROUP("uart1_grp", southwest_uart1_pins, 1, false),
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PIN_GROUP("uart2_grp", southwest_uart2_pins, 1, false),
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PIN_GROUP("hda_grp", southwest_hda_pins, 2, false),
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PIN_GROUP("i2c0_grp", southwest_i2c0_pins, 1, true),
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PIN_GROUP("i2c1_grp", southwest_i2c1_pins, 1, true),
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PIN_GROUP("i2c2_grp", southwest_i2c2_pins, 1, true),
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PIN_GROUP("i2c3_grp", southwest_i2c3_pins, 1, true),
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PIN_GROUP("i2c4_grp", southwest_i2c4_pins, 1, true),
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PIN_GROUP("i2c5_grp", southwest_i2c5_pins, 1, true),
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PIN_GROUP("i2c6_grp", southwest_i2c6_pins, 1, true),
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PIN_GROUP("i2c_nfc_grp", southwest_i2c_nfc_pins, 2, true),
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PIN_GROUP_WITH_OVERRIDE("lpe_grp", southwest_lpe_pins, 1, false,
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southwest_lpe_altfuncs),
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PIN_GROUP_WITH_OVERRIDE("spi3_grp", southwest_spi3_pins, 2, false,
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southwest_spi3_altfuncs),
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};
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static const char * const southwest_uart0_groups[] = { "uart0_grp" };
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static const char * const southwest_uart1_groups[] = { "uart1_grp" };
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static const char * const southwest_uart2_groups[] = { "uart2_grp" };
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static const char * const southwest_hda_groups[] = { "hda_grp" };
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static const char * const southwest_lpe_groups[] = { "lpe_grp" };
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static const char * const southwest_i2c0_groups[] = { "i2c0_grp" };
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static const char * const southwest_i2c1_groups[] = { "i2c1_grp" };
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static const char * const southwest_i2c2_groups[] = { "i2c2_grp" };
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static const char * const southwest_i2c3_groups[] = { "i2c3_grp" };
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static const char * const southwest_i2c4_groups[] = { "i2c4_grp" };
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static const char * const southwest_i2c5_groups[] = { "i2c5_grp" };
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static const char * const southwest_i2c6_groups[] = { "i2c6_grp" };
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static const char * const southwest_i2c_nfc_groups[] = { "i2c_nfc_grp" };
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static const char * const southwest_spi3_groups[] = { "spi3_grp" };
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/*
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* Only do pinmuxing for certain LPSS devices for now. Rest of the pins are
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* enabled only as GPIOs.
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*/
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static const struct chv_function southwest_functions[] = {
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FUNCTION("uart0", southwest_uart0_groups),
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FUNCTION("uart1", southwest_uart1_groups),
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FUNCTION("uart2", southwest_uart2_groups),
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FUNCTION("hda", southwest_hda_groups),
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FUNCTION("lpe", southwest_lpe_groups),
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FUNCTION("i2c0", southwest_i2c0_groups),
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FUNCTION("i2c1", southwest_i2c1_groups),
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FUNCTION("i2c2", southwest_i2c2_groups),
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FUNCTION("i2c3", southwest_i2c3_groups),
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FUNCTION("i2c4", southwest_i2c4_groups),
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FUNCTION("i2c5", southwest_i2c5_groups),
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FUNCTION("i2c6", southwest_i2c6_groups),
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FUNCTION("i2c_nfc", southwest_i2c_nfc_groups),
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FUNCTION("spi3", southwest_spi3_groups),
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};
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static const struct chv_gpio_pinrange southwest_gpio_ranges[] = {
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GPIO_PINRANGE(0, 7),
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GPIO_PINRANGE(15, 22),
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GPIO_PINRANGE(30, 37),
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GPIO_PINRANGE(45, 52),
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GPIO_PINRANGE(60, 67),
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GPIO_PINRANGE(75, 82),
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GPIO_PINRANGE(90, 97),
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};
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static const struct chv_community southwest_community = {
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.uid = "1",
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.pins = southwest_pins,
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.npins = ARRAY_SIZE(southwest_pins),
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.groups = southwest_groups,
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.ngroups = ARRAY_SIZE(southwest_groups),
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.functions = southwest_functions,
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.nfunctions = ARRAY_SIZE(southwest_functions),
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.gpio_ranges = southwest_gpio_ranges,
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.ngpio_ranges = ARRAY_SIZE(southwest_gpio_ranges),
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.ngpios = ARRAY_SIZE(southwest_pins),
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};
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static const struct pinctrl_pin_desc north_pins[] = {
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PINCTRL_PIN(0, "GPIO_DFX_0"),
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PINCTRL_PIN(1, "GPIO_DFX_3"),
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PINCTRL_PIN(2, "GPIO_DFX_7"),
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PINCTRL_PIN(3, "GPIO_DFX_1"),
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PINCTRL_PIN(4, "GPIO_DFX_5"),
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PINCTRL_PIN(5, "GPIO_DFX_4"),
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PINCTRL_PIN(6, "GPIO_DFX_8"),
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PINCTRL_PIN(7, "GPIO_DFX_2"),
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PINCTRL_PIN(8, "GPIO_DFX_6"),
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PINCTRL_PIN(15, "GPIO_SUS0"),
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PINCTRL_PIN(16, "SEC_GPIO_SUS10"),
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PINCTRL_PIN(17, "GPIO_SUS3"),
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PINCTRL_PIN(18, "GPIO_SUS7"),
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PINCTRL_PIN(19, "GPIO_SUS1"),
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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),
|
|
};
|
|
|
|
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),
|
|
};
|
|
|
|
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),
|
|
};
|
|
|
|
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, "ctrl0 0x%08x ctrl1 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, u16 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;
|
|
u16 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, 16) {
|
|
unsigned irq, offset;
|
|
|
|
offset = pctrl->intr_lines[intr_line];
|
|
irq = irq_find_mapping(gc->irqdomain, offset);
|
|
generic_handle_irq(irq);
|
|
}
|
|
|
|
chained_irq_exit(chip, desc);
|
|
}
|
|
|
|
static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
|
|
{
|
|
const struct chv_gpio_pinrange *range;
|
|
struct gpio_chip *chip = &pctrl->chip;
|
|
int ret, i, offset;
|
|
|
|
*chip = chv_gpio_chip;
|
|
|
|
chip->ngpio = pctrl->community->ngpios;
|
|
chip->label = dev_name(pctrl->dev);
|
|
chip->parent = pctrl->dev;
|
|
chip->base = -1;
|
|
|
|
ret = gpiochip_add_data(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");
|
|
goto fail;
|
|
}
|
|
|
|
offset += range->npins;
|
|
}
|
|
|
|
/* Mask and clear all interrupts */
|
|
chv_writel(0, pctrl->regs + CHV_INTMASK);
|
|
chv_writel(0xffff, pctrl->regs + CHV_INTSTAT);
|
|
|
|
ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0,
|
|
handle_simple_irq, IRQ_TYPE_NONE);
|
|
if (ret) {
|
|
dev_err(pctrl->dev, "failed to add IRQ chip\n");
|
|
goto fail;
|
|
}
|
|
|
|
gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
|
|
chv_gpio_irq_handler);
|
|
return 0;
|
|
|
|
fail:
|
|
gpiochip_remove(chip);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int chv_pinctrl_probe(struct platform_device *pdev)
|
|
{
|
|
struct chv_pinctrl *pctrl;
|
|
struct acpi_device *adev;
|
|
struct resource *res;
|
|
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;
|
|
|
|
platform_set_drvdata(pdev, pctrl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int chv_pinctrl_remove(struct platform_device *pdev)
|
|
{
|
|
struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
|
|
|
|
gpiochip_remove(&pctrl->chip);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int chv_pinctrl_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
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);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int chv_pinctrl_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct chv_pinctrl *pctrl = platform_get_drvdata(pdev);
|
|
int i;
|
|
|
|
/*
|
|
* 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);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static const struct dev_pm_ops chv_pinctrl_pm_ops = {
|
|
SET_LATE_SYSTEM_SLEEP_PM_OPS(chv_pinctrl_suspend, chv_pinctrl_resume)
|
|
};
|
|
|
|
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");
|