364 lines
9.7 KiB
C
364 lines
9.7 KiB
C
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/*
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* sunxi_pmc power button driver.
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*
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* Copyright (C) 2013 Carlo Caione <carlo@caione.org>
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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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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#define pr_fmt(x) KBUILD_MODNAME ": " x
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#include <linux/errno.h>
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#include <linux/irq.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/mfd/sunxi_pmc.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/regmap.h>
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#include <linux/slab.h>
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#include <linux/of.h>
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#define IRQ_DBR_BIT BIT(0)
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#define IRQ_DBF_BIT BIT(1)
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struct pk_dts {
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uint32_t pmu_powkey_off_time;
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uint32_t pmu_powkey_off_func;
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uint32_t pmu_powkey_off_en;
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uint32_t pmu_powkey_off_delay_time;
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uint32_t pmu_powkey_long_time;
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uint32_t pmu_powkey_on_time;
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uint32_t pmu_pwrok_time;
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uint32_t pmu_pwrnoe_time;
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uint32_t pmu_powkey_wakeup_rising;
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uint32_t pmu_powkey_wakeup_falling;
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};
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struct sunxi_pmc_pek {
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struct sunxi_pmc_dev *sunxi_pmc;
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struct input_dev *input;
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struct pk_dts pk_dts;
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int irq_dbr;
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int irq_dbf;
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};
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#define PMC_OF_PROP_READ(name, def_value) \
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do { \
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if (of_property_read_u32(node, #name, &pk_dts->name)) \
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pk_dts->name = def_value; \
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} while (0)
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static int pmc_powerkey_dt_parse(struct device_node *node,
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struct pk_dts *pk_dts)
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{
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if (!of_device_is_available(node)) {
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pr_err("%s: failed\n", __func__);
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return -1;
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}
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PMC_OF_PROP_READ(pmu_powkey_off_time, 6000);
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PMC_OF_PROP_READ(pmu_powkey_off_func, 0);
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PMC_OF_PROP_READ(pmu_powkey_off_en, 1);
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PMC_OF_PROP_READ(pmu_powkey_off_delay_time, 0);
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PMC_OF_PROP_READ(pmu_powkey_long_time, 1500);
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PMC_OF_PROP_READ(pmu_powkey_on_time, 1000);
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PMC_OF_PROP_READ(pmu_pwrok_time, 64);
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PMC_OF_PROP_READ(pmu_pwrnoe_time, 2000);
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pk_dts->pmu_powkey_wakeup_rising =
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of_property_read_bool(node, "wakeup_rising");
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pk_dts->pmu_powkey_wakeup_falling =
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of_property_read_bool(node, "wakeup_falling");
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return 0;
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}
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static irqreturn_t sunxi_pmc_pek_irq(int irq, void *pwr)
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{
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struct input_dev *idev = pwr;
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struct sunxi_pmc_pek *sunxi_pmc_pek = input_get_drvdata(idev);
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/*
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* The power-button is connected to ground so a falling edge (dbf)
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* means it is pressed.
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*/
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if (irq == sunxi_pmc_pek->irq_dbf)
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input_report_key(idev, KEY_POWER, true);
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else if (irq == sunxi_pmc_pek->irq_dbr)
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input_report_key(idev, KEY_POWER, false);
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input_sync(idev);
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return IRQ_HANDLED;
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}
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static int pmc_config_set(struct sunxi_pmc_pek *sunxi_pmc_pek)
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{
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struct sunxi_pmc_dev *sunxi_pmc_dev = sunxi_pmc_pek->sunxi_pmc;
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struct regmap *regmap = sunxi_pmc_dev->regmap;
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struct pk_dts *pk_dts = &sunxi_pmc_pek->pk_dts;
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unsigned int val;
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regmap_read(regmap, PMC_DLY_CTRL_REG, &val);
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val &= ~(0x7 << 5);
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if (pk_dts->pmu_powkey_on_time <= 128) {
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val |= (0x00 << 5);
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} else if (pk_dts->pmu_powkey_on_time <= 256) {
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val |= (0x01 << 5);
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} else if (pk_dts->pmu_powkey_on_time <= 512) {
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val |= (0x02 << 5);
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} else if (pk_dts->pmu_powkey_on_time <= 1000) {
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val |= (0x03 << 5);
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} else {
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val |= (0x04 << 5);
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}
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regmap_write(regmap, PMC_DLY_CTRL_REG, val);
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/* pok long time set*/
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if (pk_dts->pmu_powkey_long_time < 1000)
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pk_dts->pmu_powkey_long_time = 1000;
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if (pk_dts->pmu_powkey_long_time > 2500)
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pk_dts->pmu_powkey_long_time = 2500;
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regmap_read(regmap, PMC_DLY_CTRL_REG, &val);
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val &= ~(0x3 << 10);
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val |= (((pk_dts->pmu_powkey_long_time - 1000) / 500)
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<< 10);
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regmap_write(regmap, PMC_DLY_CTRL_REG, val);
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/* pek offlevel poweroff en set*/
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regmap_read(regmap, SW_CFG_REG, &val);
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val &= ~((0x1 << 12) | (0xffff << 16));
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val |= ((!!pk_dts->pmu_powkey_off_en) << 12);
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regmap_write(regmap, SW_CFG_REG, val | 0x16AA << 16);
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val &= ~(0xffff << 16);
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val |= (0xAA16 << 16);
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regmap_write(regmap, SW_CFG_REG, val);
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/*Init offlevel restart or not */
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regmap_read(regmap, SW_CFG_REG, &val);
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val &= ~((0x3 << 1) | (0xffff << 16));
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val |= ((!!pk_dts->pmu_powkey_off_func) << 1);/* restart or not restart */
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regmap_write(regmap, SW_CFG_REG, val | (0x16AA) << 16);
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val &= ~(0xffff << 16);
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val |= (0xAA16 << 16);
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regmap_write(regmap, SW_CFG_REG, val);
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/* pek delay set */
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regmap_read(regmap, RST_DLY_SEL_REG, &val);
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val &= ~(0x7 << 4);
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if (pk_dts->pmu_pwrok_time <= 4) {
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val |= (0 << 4);
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} else if (pk_dts->pmu_pwrok_time <= 8) {
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val |= (1 << 4);
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} else if (pk_dts->pmu_pwrok_time <= 16) {
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val |= (2 << 4);
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} else if (pk_dts->pmu_pwrok_time <= 32) {
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val |= (3 << 4);
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} else {
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val |= (4 << 4);
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}
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regmap_write(regmap, RST_DLY_SEL_REG, val);
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/* pek offlevel time set */
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regmap_read(regmap, PMC_DLY_CTRL_REG, &val);
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val &= ~(0x3 << 8);
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if (pk_dts->pmu_powkey_off_time <= 6000) {
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val |= (0 << 8);
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} else if (pk_dts->pmu_powkey_off_time <= 8000) {
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val |= (1 << 8);
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} else {
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val |= (2 << 8);
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}
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regmap_write(regmap, PMC_DLY_CTRL_REG, val);
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return 0;
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}
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static void sunxi_pmc_dts_param_set(struct sunxi_pmc_pek *sunxi_pmc_pek)
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{
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struct sunxi_pmc_dev *sunxi_pmc_dev = sunxi_pmc_pek->sunxi_pmc;
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if (!pmc_powerkey_dt_parse(sunxi_pmc_pek->input->dev.parent->of_node,
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&sunxi_pmc_pek->pk_dts)) {
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switch (sunxi_pmc_dev->variant) {
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case PMC_V1_ID:
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pmc_config_set(sunxi_pmc_pek);
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break;
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default:
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pr_warn("Setting power key for unsupported PMC variant\n");
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}
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}
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}
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static int sunxi_pmc_pek_probe(struct platform_device *pdev)
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{
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struct sunxi_pmc_pek *sunxi_pmc_pek;
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struct sunxi_pmc_dev *sunxi_pmc;
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struct input_dev *idev;
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int error;
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sunxi_pmc_pek = devm_kzalloc(&pdev->dev, sizeof(struct sunxi_pmc_pek),
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GFP_KERNEL);
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if (!sunxi_pmc_pek)
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return -ENOMEM;
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sunxi_pmc_pek->sunxi_pmc = dev_get_drvdata(pdev->dev.parent);
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sunxi_pmc = sunxi_pmc_pek->sunxi_pmc;
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if (!sunxi_pmc->irq) {
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pr_err("sunxi_pmc-pek can not register without irq\n");
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return -EINVAL;
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}
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sunxi_pmc_pek->irq_dbr = platform_get_irq_byname(pdev, "PEK_DBR");
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if (sunxi_pmc_pek->irq_dbr < 0) {
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dev_err(&pdev->dev, "No IRQ for PEK_DBR, error=%d\n",
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sunxi_pmc_pek->irq_dbr);
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return sunxi_pmc_pek->irq_dbr;
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}
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sunxi_pmc_pek->irq_dbr = regmap_irq_get_virq(sunxi_pmc->regmap_irqc,
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sunxi_pmc_pek->irq_dbr);
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sunxi_pmc_pek->irq_dbf = platform_get_irq_byname(pdev, "PEK_DBF");
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if (sunxi_pmc_pek->irq_dbf < 0) {
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dev_err(&pdev->dev, "No IRQ for PEK_DBF, error=%d\n",
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sunxi_pmc_pek->irq_dbf);
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return sunxi_pmc_pek->irq_dbf;
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}
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sunxi_pmc_pek->irq_dbf = regmap_irq_get_virq(sunxi_pmc->regmap_irqc,
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sunxi_pmc_pek->irq_dbf);
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sunxi_pmc_pek->input = devm_input_allocate_device(&pdev->dev);
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if (!sunxi_pmc_pek->input)
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return -ENOMEM;
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idev = sunxi_pmc_pek->input;
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switch (sunxi_pmc->variant) {
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case PMC_V1_ID:
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idev->name = "pmc-v1-pek";
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break;
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default:
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idev->name = "sunxi_pmc-pek";
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break;
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}
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idev->phys = "m1kbd/input2";
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idev->dev.parent = &pdev->dev;
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input_set_capability(idev, EV_KEY, KEY_POWER);
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set_bit(EV_REP, idev->evbit);
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input_set_drvdata(idev, sunxi_pmc_pek);
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sunxi_pmc_dts_param_set(sunxi_pmc_pek);
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error = devm_request_any_context_irq(&pdev->dev, sunxi_pmc_pek->irq_dbr,
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sunxi_pmc_pek_irq, 0,
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"sunxi_pmc-pek-dbr", idev);
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if (error < 0) {
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dev_err(sunxi_pmc->dev, "Failed to request dbr IRQ#%d: %d\n",
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sunxi_pmc_pek->irq_dbr, error);
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return error;
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}
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error = devm_request_any_context_irq(&pdev->dev, sunxi_pmc_pek->irq_dbf,
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sunxi_pmc_pek_irq, 0,
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"sunxi_pmc-pek-dbf", idev);
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if (error < 0) {
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dev_err(sunxi_pmc->dev, "Failed to request dbf IRQ#%d: %d\n",
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sunxi_pmc_pek->irq_dbf, error);
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return error;
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}
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error = input_register_device(idev);
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if (error) {
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dev_err(sunxi_pmc->dev, "Can't register input device: %d\n",
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error);
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return error;
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}
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platform_set_drvdata(pdev, sunxi_pmc_pek);
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return 0;
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}
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static int sunxi_pmc_pek_remove(struct platform_device *pdev)
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{
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struct sunxi_pmc_pek *sunxi_pmc_pek = platform_get_drvdata(pdev);
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input_unregister_device(sunxi_pmc_pek->input);
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return 0;
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}
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static int sunxi_pmc_powerkey_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sunxi_pmc_pek *sunxi_pmc_pek = platform_get_drvdata(pdev);
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if (!sunxi_pmc_pek->pk_dts.pmu_powkey_wakeup_rising) {
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disable_irq(sunxi_pmc_pek->irq_dbr);
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}
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if (!sunxi_pmc_pek->pk_dts.pmu_powkey_wakeup_falling) {
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disable_irq(sunxi_pmc_pek->irq_dbf);
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}
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return 0;
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}
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static int sunxi_pmc_powerkey_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct sunxi_pmc_pek *sunxi_pmc_pek = platform_get_drvdata(pdev);
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if (!sunxi_pmc_pek->pk_dts.pmu_powkey_wakeup_rising) {
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enable_irq(sunxi_pmc_pek->irq_dbr);
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}
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if (!sunxi_pmc_pek->pk_dts.pmu_powkey_wakeup_falling) {
|
||
|
|
enable_irq(sunxi_pmc_pek->irq_dbf);
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const struct dev_pm_ops sunxi_pmc_powerkey_pm_ops = {
|
||
|
|
.suspend = sunxi_pmc_powerkey_suspend,
|
||
|
|
.resume = sunxi_pmc_powerkey_resume,
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct of_device_id pmc_match_table[] = {
|
||
|
|
{ .compatible = "x-powers,pmc-pek" },
|
||
|
|
{ /* sentinel */ },
|
||
|
|
};
|
||
|
|
|
||
|
|
static struct platform_driver sunxi_pmc_pek_driver = {
|
||
|
|
.probe = sunxi_pmc_pek_probe,
|
||
|
|
.remove = sunxi_pmc_pek_remove,
|
||
|
|
.driver = {
|
||
|
|
.of_match_table = pmc_match_table,
|
||
|
|
.name = "pmc-pek",
|
||
|
|
.pm = &sunxi_pmc_powerkey_pm_ops,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
module_platform_driver(sunxi_pmc_pek_driver);
|
||
|
|
|
||
|
|
MODULE_DESCRIPTION("sunxi_pmc Power Button");
|
||
|
|
MODULE_AUTHOR("Carlo Caione <carlo@caione.org>");
|
||
|
|
MODULE_LICENSE("GPL");
|
||
|
|
MODULE_ALIAS("platform:sunxi_pmc-pek");
|