230 lines
6.4 KiB
C
230 lines
6.4 KiB
C
/*
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* Copyright (c) 2014 MediaTek Inc.
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* Author: Hongzhou.Yang <hongzhou.yang@mediatek.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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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef __PINCTRL_MTK_COMMON_H
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#define __PINCTRL_MTK_COMMON_H
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#include <linux/pinctrl/pinctrl.h>
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#include <linux/regmap.h>
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#define NO_EINT_SUPPORT 255
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#define MTK_CHIP_TYPE_BASE 0
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#define MTK_CHIP_TYPE_PMIC 1
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#define MT_EDGE_SENSITIVE 0
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#define MT_LEVEL_SENSITIVE 1
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#define EINT_DBNC_SET_DBNC_BITS 4
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#define EINT_DBNC_RST_BIT (0x1 << 1)
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#define EINT_DBNC_SET_EN (0x1 << 0)
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struct mtk_desc_function {
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const char *name;
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unsigned char muxval;
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};
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struct mtk_desc_eint {
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unsigned char eintmux;
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unsigned char eintnum;
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};
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struct mtk_desc_pin {
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struct pinctrl_pin_desc pin;
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const char *chip;
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const struct mtk_desc_eint eint;
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const struct mtk_desc_function *functions;
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};
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#define MTK_PIN(_pin, _pad, _chip, _eint, ...) \
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{ \
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.pin = _pin, \
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.chip = _chip, \
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.eint = _eint, \
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.functions = (struct mtk_desc_function[]){ \
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__VA_ARGS__, { } }, \
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}
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#define MTK_EINT_FUNCTION(_eintmux, _eintnum) \
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{ \
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.eintmux = _eintmux, \
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.eintnum = _eintnum, \
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}
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#define MTK_FUNCTION(_val, _name) \
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{ \
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.muxval = _val, \
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.name = _name, \
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}
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#define SET_ADDR(x, y) (x + (y->devdata->port_align))
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#define CLR_ADDR(x, y) (x + (y->devdata->port_align << 1))
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struct mtk_pinctrl_group {
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const char *name;
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unsigned long config;
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unsigned pin;
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};
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/**
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* struct mtk_drv_group_desc - Provide driving group data.
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* @max_drv: The maximum current of this group.
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* @min_drv: The minimum current of this group.
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* @low_bit: The lowest bit of this group.
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* @high_bit: The highest bit of this group.
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* @step: The step current of this group.
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*/
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struct mtk_drv_group_desc {
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unsigned char min_drv;
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unsigned char max_drv;
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unsigned char low_bit;
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unsigned char high_bit;
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unsigned char step;
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};
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#define MTK_DRV_GRP(_min, _max, _low, _high, _step) \
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{ \
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.min_drv = _min, \
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.max_drv = _max, \
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.low_bit = _low, \
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.high_bit = _high, \
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.step = _step, \
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}
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/**
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* struct mtk_pin_drv_grp - Provide each pin driving info.
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* @pin: The pin number.
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* @offset: The offset of driving register for this pin.
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* @bit: The bit of driving register for this pin.
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* @grp: The group for this pin belongs to.
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*/
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struct mtk_pin_drv_grp {
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unsigned int pin;
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unsigned int offset;
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unsigned char bit;
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unsigned char grp;
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};
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#define MTK_PIN_DRV_GRP(_pin, _offset, _bit, _grp) \
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{ \
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.pin = _pin, \
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.offset = _offset, \
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.bit = _bit, \
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.grp = _grp, \
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}
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struct mtk_eint_offsets {
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const char *name;
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unsigned int stat;
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unsigned int ack;
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unsigned int mask;
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unsigned int mask_set;
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unsigned int mask_clr;
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unsigned int sens;
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unsigned int sens_set;
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unsigned int sens_clr;
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unsigned int soft;
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unsigned int soft_set;
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unsigned int soft_clr;
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unsigned int pol;
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unsigned int pol_set;
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unsigned int pol_clr;
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unsigned int dom_en;
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unsigned int dbnc_ctrl;
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unsigned int dbnc_set;
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unsigned int dbnc_clr;
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u8 port_mask;
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u8 ports;
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};
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/**
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* struct mtk_pinctrl_devdata - Provide HW GPIO related data.
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* @pins: An array describing all pins the pin controller affects.
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* @npins: The number of entries in @pins.
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*
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* @grp_desc: The driving group info.
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* @pin_drv_grp: The driving group for all pins.
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* @spec_pull_set: Each SoC may have special pins for pull up/down setting,
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* these pins' pull setting are very different, they have separate pull
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* up/down bit, R0 and R1 resistor bit, so they need special pull setting.
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* If special setting is success, this should return 0, otherwise it should
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* return non-zero value.
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* @spec_ies_smt_set: Some pins are irregular, their input enable and smt
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* control register are discontinuous, but they are mapping together. That
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* means when user set smt, input enable is set at the same time. So they
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* also need special control. If special control is success, this should
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* return 0, otherwise return non-zero value.
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*
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* @dir_offset: The direction register offset.
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* @pullen_offset: The pull-up/pull-down enable register offset.
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* @pinmux_offset: The pinmux register offset.
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*
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* @type1_start: Some chips have two base addresses for pull select register,
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* that means some pins use the first address and others use the second. This
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* member record the start of pin number to use the second address.
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* @type1_end: The end of pin number to use the second address.
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*
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* @port_shf: The shift between two registers.
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* @port_mask: The mask of register.
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* @port_align: Provide clear register and set register step.
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*/
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struct mtk_pinctrl_devdata {
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const struct mtk_desc_pin *pins;
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unsigned int npins;
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const struct mtk_drv_group_desc *grp_desc;
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unsigned int n_grp_cls;
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const struct mtk_pin_drv_grp *pin_drv_grp;
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unsigned int n_pin_drv_grps;
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int (*spec_pull_set)(struct regmap *reg, unsigned int pin,
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unsigned char align, bool isup, unsigned int arg);
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int (*spec_ies_smt_set)(struct regmap *reg, unsigned int pin,
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unsigned char align, int value);
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unsigned int dir_offset;
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unsigned int ies_offset;
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unsigned int smt_offset;
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unsigned int pullen_offset;
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unsigned int pullsel_offset;
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unsigned int drv_offset;
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unsigned int invser_offset;
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unsigned int dout_offset;
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unsigned int din_offset;
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unsigned int pinmux_offset;
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unsigned short type1_start;
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unsigned short type1_end;
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unsigned char port_shf;
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unsigned char port_mask;
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unsigned char port_align;
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unsigned char chip_type;
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struct mtk_eint_offsets eint_offsets;
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unsigned int ap_num;
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unsigned int db_cnt;
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};
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struct mtk_pinctrl {
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struct regmap *regmap1;
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struct regmap *regmap2;
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struct device *dev;
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struct gpio_chip *chip;
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struct mtk_pinctrl_group *groups;
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unsigned ngroups;
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const char **grp_names;
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struct pinctrl_dev *pctl_dev;
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const struct mtk_pinctrl_devdata *devdata;
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void __iomem *eint_reg_base;
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struct irq_domain *domain;
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int *eint_dual_edges;
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};
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int mtk_pctrl_init(struct platform_device *pdev,
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const struct mtk_pinctrl_devdata *data);
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#endif /* __PINCTRL_MTK_COMMON_H */
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