500 lines
12 KiB
C
500 lines
12 KiB
C
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/*
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* Copyright (C) 2017 MediaTek, Inc.
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*
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* Author: Chen Zhong <chen.zhong@mediatek.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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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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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#include <linux/kernel.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/regmap.h>
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#include <linux/mfd/mt6323/registers.h>
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#include <linux/mfd/mt6359/registers.h>
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#include <linux/mfd/mt6397/registers.h>
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#include <linux/mfd/mt6397/core.h>
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#include <linux/mfd/mt6357/registers.h>
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#include <linux/mfd/mt6357/core.h>
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#define MTK_PMIC_PWRKEY_INDEX 0
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#define MTK_PMIC_HOMEKEY_INDEX 1
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#define MTK_PMIC_MAX_KEY_COUNT 2
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#define MT6397_PWRKEY_RST_SHIFT 6
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#define MT6397_HOMEKEY_RST_SHIFT 5
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#define MT6397_RST_DU_SHIFT 8
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#define MT6357_PWRKEY_RST_SHIFT 9
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#define MT6357_HOMEKEY_RST_SHIFT 8
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#define MT6357_RST_DU_SHIFT 12
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#define MT6359_PWRKEY_RST_SHIFT 9
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#define MT6359_HOMEKEY_RST_SHIFT 8
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#define MT6359_RST_DU_SHIFT 12
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#define PWRKEY_RST_EN 0x1
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#define HOMEKEY_RST_EN 0x1
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#define RST_DU_MASK 0x3
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#define INVALID_VALUE 0
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struct mtk_pmic_keys_regs {
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u32 deb_reg;
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u32 deb_mask;
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u32 intsel_reg;
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u32 intsel_mask;
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};
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#define MTK_PMIC_KEYS_REGS(_deb_reg, _deb_mask, \
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_intsel_reg, _intsel_mask) \
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{ \
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.deb_reg = _deb_reg, \
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.deb_mask = _deb_mask, \
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.intsel_reg = _intsel_reg, \
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.intsel_mask = _intsel_mask, \
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}
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#define RELEASE_IRQ_INTERVAL 2
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struct mtk_pmic_regs {
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const struct mtk_pmic_keys_regs keys_regs[MTK_PMIC_MAX_KEY_COUNT];
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bool release_irq;
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u32 pmic_rst_reg;
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u32 pwrkey_rst_shift;
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u32 homekey_rst_shift;
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u32 rst_du_shift;
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};
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static const struct mtk_pmic_regs mt6397_regs = {
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.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6397_CHRSTATUS,
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0x8, MT6397_INT_RSV, 0x10),
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.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6397_OCSTATUS2,
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0x10, MT6397_INT_RSV, 0x8),
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.release_irq = false,
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.pmic_rst_reg = MT6397_TOP_RST_MISC,
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.pwrkey_rst_shift = MT6397_PWRKEY_RST_SHIFT,
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.homekey_rst_shift = MT6397_HOMEKEY_RST_SHIFT,
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.rst_du_shift = MT6397_RST_DU_SHIFT,
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};
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static const struct mtk_pmic_regs mt6323_regs = {
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.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
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0x2, MT6323_INT_MISC_CON, 0x10),
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.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6323_CHRSTATUS,
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0x4, MT6323_INT_MISC_CON, 0x8),
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.release_irq = false,
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.pmic_rst_reg = MT6323_TOP_RST_MISC,
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.pwrkey_rst_shift = MT6397_PWRKEY_RST_SHIFT,
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.homekey_rst_shift = MT6397_HOMEKEY_RST_SHIFT,
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.rst_du_shift = MT6397_RST_DU_SHIFT,
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};
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static const struct mtk_pmic_regs mt6359_regs = {
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.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6359_TOPSTATUS,
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0x2, MT6359_PSC_TOP_INT_CON0, 0x1),
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.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6359_TOPSTATUS,
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0x8, MT6359_PSC_TOP_INT_CON0, 0x2),
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.release_irq = true,
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.pmic_rst_reg = MT6359_TOP_RST_MISC,
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.pwrkey_rst_shift = MT6359_PWRKEY_RST_SHIFT,
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.homekey_rst_shift = MT6359_HOMEKEY_RST_SHIFT,
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.rst_du_shift = MT6359_RST_DU_SHIFT,
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};
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static const struct mtk_pmic_regs mt6357_regs = {
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.keys_regs[MTK_PMIC_PWRKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6357_TOPSTATUS,
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0x2,
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MT6357_PSC_TOP_INT_CON0,
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MT6357_RG_INT_EN_PWRKEY_MASK),
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.keys_regs[MTK_PMIC_HOMEKEY_INDEX] =
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MTK_PMIC_KEYS_REGS(MT6357_TOPSTATUS,
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MT6357_HOMEKEY_DEB_MASK,
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MT6357_PSC_TOP_INT_CON0,
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MT6357_RG_INT_EN_HOMEKEY_MASK),
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.release_irq = true,
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.pmic_rst_reg = MT6357_TOP_RST_MISC,
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.pwrkey_rst_shift = MT6357_PWRKEY_RST_SHIFT,
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.homekey_rst_shift = MT6357_HOMEKEY_RST_SHIFT,
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.rst_du_shift = MT6357_RST_DU_SHIFT,
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};
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struct mtk_pmic_keys_info {
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struct mtk_pmic_keys *keys;
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const struct mtk_pmic_keys_regs *regs;
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unsigned int keycode;
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int irq;
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int release_irq_num;
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bool wakeup:1;
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};
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struct mtk_pmic_keys {
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struct input_dev *input_dev;
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struct device *dev;
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struct regmap *regmap;
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struct mtk_pmic_keys_info keys[MTK_PMIC_MAX_KEY_COUNT];
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};
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enum mtk_pmic_keys_lp_mode {
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LP_DISABLE,
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LP_ONEKEY,
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LP_TWOKEY,
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};
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struct mtk_pmic_keys *keys;
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static void mtk_pmic_keys_lp_reset_setup(struct mtk_pmic_keys *keys,
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const struct mtk_pmic_regs *pmic_regs)
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{
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int ret;
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u32 long_press_mode, long_press_debounce;
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u32 pmic_rst_reg = pmic_regs->pmic_rst_reg;
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u32 pwrkey_rst = PWRKEY_RST_EN << pmic_regs->pwrkey_rst_shift;
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u32 homekey_rst =
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HOMEKEY_RST_EN << pmic_regs->homekey_rst_shift;
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ret = of_property_read_u32(keys->dev->of_node,
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"power-off-time-sec", &long_press_debounce);
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if (ret)
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long_press_debounce = 0;
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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RST_DU_MASK << pmic_regs->rst_du_shift,
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long_press_debounce << pmic_regs->rst_du_shift);
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ret = of_property_read_u32(keys->dev->of_node,
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"mediatek,long-press-mode", &long_press_mode);
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if (ret)
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long_press_mode = LP_DISABLE;
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switch (long_press_mode) {
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case LP_ONEKEY:
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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pwrkey_rst,
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pwrkey_rst);
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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homekey_rst,
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0);
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break;
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case LP_TWOKEY:
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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pwrkey_rst,
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pwrkey_rst);
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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homekey_rst,
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homekey_rst);
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break;
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case LP_DISABLE:
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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pwrkey_rst,
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0);
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regmap_update_bits(keys->regmap, pmic_rst_reg,
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homekey_rst,
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0);
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break;
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default:
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break;
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}
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}
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static irqreturn_t mtk_pmic_keys_release_irq_handler_thread(
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int irq, void *data)
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{
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struct mtk_pmic_keys_info *info = data;
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input_report_key(info->keys->input_dev, info->keycode, 0);
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input_sync(info->keys->input_dev);
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dev_dbg(info->keys->dev, "release key =%d using PMIC\n",
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info->keycode);
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return IRQ_HANDLED;
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}
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static irqreturn_t mtk_pmic_keys_irq_handler_thread(int irq, void *data)
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{
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struct mtk_pmic_keys_info *info = data;
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u32 key_deb, pressed;
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if (info->release_irq_num > 0) {
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pressed = 1;
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} else {
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regmap_read(info->keys->regmap, info->regs->deb_reg, &key_deb);
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key_deb &= info->regs->deb_mask;
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pressed = !key_deb;
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}
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input_report_key(info->keys->input_dev, info->keycode, pressed);
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input_sync(info->keys->input_dev);
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dev_dbg(info->keys->dev, "(%s) key =%d using PMIC\n",
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pressed ? "pressed" : "released", info->keycode);
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return IRQ_HANDLED;
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}
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static int mtk_pmic_key_setup(struct mtk_pmic_keys *keys,
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struct mtk_pmic_keys_info *info)
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{
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int ret;
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info->keys = keys;
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ret = regmap_update_bits(keys->regmap, info->regs->intsel_reg,
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info->regs->intsel_mask,
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info->regs->intsel_mask);
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if (ret < 0)
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return ret;
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ret = devm_request_threaded_irq(keys->dev, info->irq, NULL,
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mtk_pmic_keys_irq_handler_thread,
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IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
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"mtk-pmic-keys", info);
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if (ret) {
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dev_dbg(keys->dev, "Failed to request IRQ: %d: %d\n",
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info->irq, ret);
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return ret;
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}
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if (info->release_irq_num > 0) {
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ret = devm_request_threaded_irq(keys->dev,
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info->release_irq_num,
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NULL, mtk_pmic_keys_release_irq_handler_thread,
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IRQF_ONESHOT | IRQF_TRIGGER_HIGH,
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"mtk-pmic-keys", info);
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if (ret) {
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dev_dbg(keys->dev, "Failed to request IRQ: %d: %d\n",
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info->release_irq_num, ret);
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return ret;
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}
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}
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input_set_capability(keys->input_dev, EV_KEY, info->keycode);
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return 0;
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}
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int mtk_pmic_pwrkey_status(void)
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{
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struct mtk_pmic_keys_info *pwrkey;
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const struct mtk_pmic_keys_regs *regs;
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u32 key_deb, pressed;
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if (!keys)
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return -EINVAL;
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pwrkey = &keys->keys[MTK_PMIC_PWRKEY_INDEX];
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regs = pwrkey->regs;
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regmap_read(keys->regmap, regs->deb_reg, &key_deb);
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dev_info(keys->dev, "Read register 0x%x and mask 0x%x and value: 0x%x\n",
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regs->deb_reg, regs->deb_mask, key_deb);
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key_deb &= regs->deb_mask;
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pressed = !key_deb;
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dev_info(keys->dev, "%s power key\n", pressed ? "pressed" : "released");
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return pressed;
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}
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EXPORT_SYMBOL(mtk_pmic_pwrkey_status);
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#ifdef CONFIG_SEC_DEBUG
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int mtk_pmic_homekey_status(void)
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{
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struct mtk_pmic_keys_info *homekey;
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const struct mtk_pmic_keys_regs *regs;
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u32 key_deb, pressed;
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if (!keys)
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return -EINVAL;
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homekey = &keys->keys[MTK_PMIC_HOMEKEY_INDEX];
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regs = homekey->regs;
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regmap_read(keys->regmap, regs->deb_reg, &key_deb);
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dev_info(keys->dev, "Read register 0x%x and mask 0x%x and value: 0x%x\n",
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regs->deb_reg, regs->deb_mask, key_deb);
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key_deb &= regs->deb_mask;
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pressed = !key_deb;
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dev_info(keys->dev, "%s home key\n", pressed ? "pressed" : "released");
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return pressed;
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}
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EXPORT_SYMBOL(mtk_pmic_homekey_status);
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#endif
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static int __maybe_unused mtk_pmic_keys_suspend(struct device *dev)
|
||
|
|
{
|
||
|
|
struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
|
||
|
|
int index;
|
||
|
|
|
||
|
|
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
|
||
|
|
if (keys->keys[index].wakeup)
|
||
|
|
enable_irq_wake(keys->keys[index].irq);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static int __maybe_unused mtk_pmic_keys_resume(struct device *dev)
|
||
|
|
{
|
||
|
|
struct mtk_pmic_keys *keys = dev_get_drvdata(dev);
|
||
|
|
int index;
|
||
|
|
|
||
|
|
for (index = 0; index < MTK_PMIC_MAX_KEY_COUNT; index++) {
|
||
|
|
if (keys->keys[index].wakeup)
|
||
|
|
disable_irq_wake(keys->keys[index].irq);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static SIMPLE_DEV_PM_OPS(mtk_pmic_keys_pm_ops, mtk_pmic_keys_suspend,
|
||
|
|
mtk_pmic_keys_resume);
|
||
|
|
|
||
|
|
static const struct of_device_id of_mtk_pmic_keys_match_tbl[] = {
|
||
|
|
{
|
||
|
|
.compatible = "mediatek,mt6397-keys",
|
||
|
|
.data = &mt6397_regs,
|
||
|
|
}, {
|
||
|
|
.compatible = "mediatek,mt6323-keys",
|
||
|
|
.data = &mt6323_regs,
|
||
|
|
}, {
|
||
|
|
.compatible = "mediatek,mt6359-keys",
|
||
|
|
.data = &mt6359_regs,
|
||
|
|
}, {
|
||
|
|
.compatible = "mediatek,mt6357-keys",
|
||
|
|
.data = &mt6357_regs,
|
||
|
|
}, {
|
||
|
|
/* sentinel */
|
||
|
|
}
|
||
|
|
};
|
||
|
|
MODULE_DEVICE_TABLE(of, of_mtk_pmic_keys_match_tbl);
|
||
|
|
|
||
|
|
static int mtk_pmic_keys_probe(struct platform_device *pdev)
|
||
|
|
{
|
||
|
|
int error, index = 0;
|
||
|
|
unsigned int keycount;
|
||
|
|
struct mt6397_chip *pmic_chip = dev_get_drvdata(pdev->dev.parent);
|
||
|
|
struct device_node *node = pdev->dev.of_node, *child;
|
||
|
|
const struct mtk_pmic_regs *mtk_pmic_regs;
|
||
|
|
struct input_dev *input_dev;
|
||
|
|
const struct of_device_id *of_id =
|
||
|
|
of_match_device(of_mtk_pmic_keys_match_tbl, &pdev->dev);
|
||
|
|
|
||
|
|
if (!of_id)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
keys = devm_kzalloc(&pdev->dev, sizeof(*keys), GFP_KERNEL);
|
||
|
|
if (!keys)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
keys->dev = &pdev->dev;
|
||
|
|
keys->regmap = pmic_chip->regmap;
|
||
|
|
mtk_pmic_regs = of_id->data;
|
||
|
|
|
||
|
|
keys->input_dev = input_dev = devm_input_allocate_device(keys->dev);
|
||
|
|
if (!input_dev) {
|
||
|
|
dev_err(keys->dev, "input allocate device fail.\n");
|
||
|
|
return -ENOMEM;
|
||
|
|
}
|
||
|
|
|
||
|
|
input_dev->name = "mtk-pmic-keys";
|
||
|
|
input_dev->id.bustype = BUS_HOST;
|
||
|
|
input_dev->id.vendor = 0x0001;
|
||
|
|
input_dev->id.product = 0x0001;
|
||
|
|
input_dev->id.version = 0x0001;
|
||
|
|
|
||
|
|
__set_bit(EV_KEY, input_dev->evbit);
|
||
|
|
keycount = of_get_available_child_count(node);
|
||
|
|
if (keycount > MTK_PMIC_MAX_KEY_COUNT) {
|
||
|
|
dev_err(keys->dev, "too many keys defined (%d)\n", keycount);
|
||
|
|
return -EINVAL;
|
||
|
|
}
|
||
|
|
|
||
|
|
for_each_child_of_node(node, child) {
|
||
|
|
keys->keys[index].regs = &mtk_pmic_regs->keys_regs[index];
|
||
|
|
|
||
|
|
keys->keys[index].irq = platform_get_irq(pdev, index);
|
||
|
|
if (keys->keys[index].irq < 0)
|
||
|
|
return keys->keys[index].irq;
|
||
|
|
|
||
|
|
if (mtk_pmic_regs->release_irq) {
|
||
|
|
keys->keys[index].release_irq_num = platform_get_irq(
|
||
|
|
pdev,
|
||
|
|
index + RELEASE_IRQ_INTERVAL);
|
||
|
|
if (keys->keys[index].release_irq_num < 0)
|
||
|
|
return keys->keys[index].release_irq_num;
|
||
|
|
}
|
||
|
|
|
||
|
|
error = of_property_read_u32(child,
|
||
|
|
"linux,keycodes", &keys->keys[index].keycode);
|
||
|
|
if (error) {
|
||
|
|
dev_err(keys->dev,
|
||
|
|
"failed to read key:%d linux,keycode property: %d\n",
|
||
|
|
index, error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (of_property_read_bool(child, "wakeup-source"))
|
||
|
|
keys->keys[index].wakeup = true;
|
||
|
|
|
||
|
|
error = mtk_pmic_key_setup(keys, &keys->keys[index]);
|
||
|
|
if (error) {
|
||
|
|
pr_info("Set key index = %d error.\n", index);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
index++;
|
||
|
|
}
|
||
|
|
|
||
|
|
error = input_register_device(input_dev);
|
||
|
|
if (error) {
|
||
|
|
dev_err(&pdev->dev,
|
||
|
|
"register input device failed (%d)\n", error);
|
||
|
|
return error;
|
||
|
|
}
|
||
|
|
|
||
|
|
mtk_pmic_keys_lp_reset_setup(keys, mtk_pmic_regs);
|
||
|
|
|
||
|
|
platform_set_drvdata(pdev, keys);
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static struct platform_driver pmic_keys_pdrv = {
|
||
|
|
.probe = mtk_pmic_keys_probe,
|
||
|
|
.driver = {
|
||
|
|
.name = "mtk-pmic-keys",
|
||
|
|
.of_match_table = of_mtk_pmic_keys_match_tbl,
|
||
|
|
.pm = &mtk_pmic_keys_pm_ops,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
module_platform_driver(pmic_keys_pdrv);
|
||
|
|
|
||
|
|
MODULE_LICENSE("GPL v2");
|
||
|
|
MODULE_AUTHOR("Chen Zhong <chen.zhong@mediatek.com>");
|
||
|
|
MODULE_DESCRIPTION("MTK pmic-keys driver v0.1");
|