2010-03-15 20:40:06 -06:00
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/*
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* arch/arm/mach-tegra/gpio.c
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*
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* Copyright (c) 2010 Google, Inc
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*
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* Author:
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* Erik Gilling <konkers@google.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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2013-01-21 03:09:01 -07:00
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#include <linux/err.h>
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2010-03-15 20:40:06 -06:00
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#include <linux/init.h>
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#include <linux/irq.h>
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2010-04-07 13:59:42 -06:00
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#include <linux/interrupt.h>
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2010-03-15 20:40:06 -06:00
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#include <linux/io.h>
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#include <linux/gpio.h>
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2012-03-16 17:35:08 -06:00
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#include <linux/of_device.h>
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2011-10-11 16:16:14 -06:00
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#include <linux/platform_device.h>
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#include <linux/module.h>
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2012-01-04 01:39:37 -07:00
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#include <linux/irqdomain.h>
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2013-01-18 08:31:37 -07:00
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#include <linux/irqchip/chained_irq.h>
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2012-02-18 01:04:55 -07:00
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#include <linux/pinctrl/consumer.h>
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2012-11-07 08:01:32 -07:00
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#include <linux/pm.h>
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2010-03-15 20:40:06 -06:00
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#define GPIO_BANK(x) ((x) >> 5)
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#define GPIO_PORT(x) (((x) >> 3) & 0x3)
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#define GPIO_BIT(x) ((x) & 0x7)
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2016-04-25 04:38:33 -06:00
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#define GPIO_REG(tgi, x) (GPIO_BANK(x) * tgi->soc->bank_stride + \
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2012-03-16 17:35:08 -06:00
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GPIO_PORT(x) * 4)
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2010-03-15 20:40:06 -06:00
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2016-04-25 04:38:33 -06:00
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#define GPIO_CNF(t, x) (GPIO_REG(t, x) + 0x00)
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#define GPIO_OE(t, x) (GPIO_REG(t, x) + 0x10)
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#define GPIO_OUT(t, x) (GPIO_REG(t, x) + 0X20)
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#define GPIO_IN(t, x) (GPIO_REG(t, x) + 0x30)
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#define GPIO_INT_STA(t, x) (GPIO_REG(t, x) + 0x40)
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#define GPIO_INT_ENB(t, x) (GPIO_REG(t, x) + 0x50)
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#define GPIO_INT_LVL(t, x) (GPIO_REG(t, x) + 0x60)
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#define GPIO_INT_CLR(t, x) (GPIO_REG(t, x) + 0x70)
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2016-04-25 04:38:34 -06:00
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#define GPIO_DBC_CNT(t, x) (GPIO_REG(t, x) + 0xF0)
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2016-04-25 04:38:33 -06:00
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#define GPIO_MSK_CNF(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x00)
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#define GPIO_MSK_OE(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x10)
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#define GPIO_MSK_OUT(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0X20)
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2016-04-25 04:38:34 -06:00
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#define GPIO_MSK_DBC_EN(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x30)
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2016-04-25 04:38:33 -06:00
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#define GPIO_MSK_INT_STA(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x40)
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#define GPIO_MSK_INT_ENB(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x50)
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#define GPIO_MSK_INT_LVL(t, x) (GPIO_REG(t, x) + t->soc->upper_offset + 0x60)
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2010-03-15 20:40:06 -06:00
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#define GPIO_INT_LVL_MASK 0x010101
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#define GPIO_INT_LVL_EDGE_RISING 0x000101
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#define GPIO_INT_LVL_EDGE_FALLING 0x000100
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#define GPIO_INT_LVL_EDGE_BOTH 0x010100
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#define GPIO_INT_LVL_LEVEL_HIGH 0x000001
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#define GPIO_INT_LVL_LEVEL_LOW 0x000000
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info;
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2010-03-15 20:40:06 -06:00
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struct tegra_gpio_bank {
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2017-07-24 08:55:08 -06:00
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unsigned int bank;
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unsigned int irq;
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2010-03-15 20:40:06 -06:00
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spinlock_t lvl_lock[4];
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2016-04-25 04:38:34 -06:00
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spinlock_t dbc_lock[4]; /* Lock for updating debounce count register */
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2012-11-07 08:01:32 -07:00
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#ifdef CONFIG_PM_SLEEP
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2010-04-07 13:59:42 -06:00
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u32 cnf[4];
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u32 out[4];
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u32 oe[4];
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u32 int_enb[4];
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u32 int_lvl[4];
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2013-04-03 05:31:44 -06:00
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u32 wake_enb[4];
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2016-04-25 04:38:34 -06:00
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u32 dbc_enb[4];
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2010-04-07 13:59:42 -06:00
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#endif
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2016-04-25 04:38:34 -06:00
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u32 dbc_cnt[4];
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi;
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2010-03-15 20:40:06 -06:00
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};
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2016-04-25 04:38:31 -06:00
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struct tegra_gpio_soc_config {
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2016-04-25 04:38:34 -06:00
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bool debounce_supported;
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2016-04-25 04:38:31 -06:00
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u32 bank_stride;
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u32 upper_offset;
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};
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info {
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struct device *dev;
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void __iomem *regs;
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struct irq_domain *irq_domain;
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struct tegra_gpio_bank *bank_info;
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const struct tegra_gpio_soc_config *soc;
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struct gpio_chip gc;
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struct irq_chip ic;
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u32 bank_count;
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};
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2011-10-11 16:16:14 -06:00
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2016-04-25 04:38:33 -06:00
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static inline void tegra_gpio_writel(struct tegra_gpio_info *tgi,
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u32 val, u32 reg)
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2011-10-11 16:16:14 -06:00
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{
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2016-04-25 04:38:33 -06:00
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__raw_writel(val, tgi->regs + reg);
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2011-10-11 16:16:14 -06:00
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}
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2016-04-25 04:38:33 -06:00
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static inline u32 tegra_gpio_readl(struct tegra_gpio_info *tgi, u32 reg)
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2011-10-11 16:16:14 -06:00
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{
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2016-04-25 04:38:33 -06:00
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return __raw_readl(tgi->regs + reg);
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2011-10-11 16:16:14 -06:00
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}
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2010-03-15 20:40:06 -06:00
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2017-07-24 08:55:08 -06:00
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static unsigned int tegra_gpio_compose(unsigned int bank, unsigned int port,
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unsigned int bit)
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2010-03-15 20:40:06 -06:00
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{
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return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
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}
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2016-04-25 04:38:33 -06:00
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static void tegra_gpio_mask_write(struct tegra_gpio_info *tgi, u32 reg,
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2017-07-24 08:55:08 -06:00
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unsigned int gpio, u32 value)
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2010-03-15 20:40:06 -06:00
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{
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u32 val;
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val = 0x100 << GPIO_BIT(gpio);
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if (value)
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val |= 1 << GPIO_BIT(gpio);
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2016-04-25 04:38:33 -06:00
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tegra_gpio_writel(tgi, val, reg);
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2010-03-15 20:40:06 -06:00
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}
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2017-07-24 08:55:08 -06:00
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static void tegra_gpio_enable(struct tegra_gpio_info *tgi, unsigned int gpio)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 1);
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2010-03-15 20:40:06 -06:00
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}
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2017-07-24 08:55:08 -06:00
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static void tegra_gpio_disable(struct tegra_gpio_info *tgi, unsigned int gpio)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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tegra_gpio_mask_write(tgi, GPIO_MSK_CNF(tgi, gpio), gpio, 0);
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2010-03-15 20:40:06 -06:00
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_request(struct gpio_chip *chip, unsigned int offset)
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2012-02-18 01:04:55 -07:00
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{
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2017-09-22 03:02:10 -06:00
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return pinctrl_gpio_request(offset);
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2012-02-18 01:04:55 -07:00
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}
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2017-07-24 08:55:07 -06:00
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static void tegra_gpio_free(struct gpio_chip *chip, unsigned int offset)
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2012-02-18 01:04:55 -07:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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2017-09-22 03:02:10 -06:00
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pinctrl_gpio_free(offset);
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2016-04-25 04:38:33 -06:00
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tegra_gpio_disable(tgi, offset);
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2012-02-18 01:04:55 -07:00
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}
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2017-07-24 08:55:07 -06:00
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static void tegra_gpio_set(struct gpio_chip *chip, unsigned int offset,
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int value)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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tegra_gpio_mask_write(tgi, GPIO_MSK_OUT(tgi, offset), offset, value);
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2010-03-15 20:40:06 -06:00
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_get(struct gpio_chip *chip, unsigned int offset)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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2017-07-24 08:55:08 -06:00
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unsigned int bval = BIT(GPIO_BIT(offset));
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2016-04-25 04:38:33 -06:00
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2012-11-08 23:04:20 -07:00
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/* If gpio is in output mode then read from the out value */
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2016-04-25 04:38:33 -06:00
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if (tegra_gpio_readl(tgi, GPIO_OE(tgi, offset)) & bval)
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return !!(tegra_gpio_readl(tgi, GPIO_OUT(tgi, offset)) & bval);
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2012-11-08 23:04:20 -07:00
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2016-04-25 04:38:33 -06:00
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return !!(tegra_gpio_readl(tgi, GPIO_IN(tgi, offset)) & bval);
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2010-03-15 20:40:06 -06:00
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_direction_input(struct gpio_chip *chip,
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unsigned int offset)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 0);
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tegra_gpio_enable(tgi, offset);
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2010-03-15 20:40:06 -06:00
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return 0;
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_direction_output(struct gpio_chip *chip,
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unsigned int offset,
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int value)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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2010-03-15 20:40:06 -06:00
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tegra_gpio_set(chip, offset, value);
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2016-04-25 04:38:33 -06:00
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tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, offset), offset, 1);
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tegra_gpio_enable(tgi, offset);
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2010-03-15 20:40:06 -06:00
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return 0;
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_get_direction(struct gpio_chip *chip,
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unsigned int offset)
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2016-04-29 10:25:23 -06:00
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{
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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u32 pin_mask = BIT(GPIO_BIT(offset));
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u32 cnf, oe;
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cnf = tegra_gpio_readl(tgi, GPIO_CNF(tgi, offset));
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if (!(cnf & pin_mask))
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return -EINVAL;
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oe = tegra_gpio_readl(tgi, GPIO_OE(tgi, offset));
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return (oe & pin_mask) ? GPIOF_DIR_OUT : GPIOF_DIR_IN;
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}
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2016-04-25 04:38:34 -06:00
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static int tegra_gpio_set_debounce(struct gpio_chip *chip, unsigned int offset,
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unsigned int debounce)
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{
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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struct tegra_gpio_bank *bank = &tgi->bank_info[GPIO_BANK(offset)];
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unsigned int debounce_ms = DIV_ROUND_UP(debounce, 1000);
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unsigned long flags;
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2017-07-24 08:55:08 -06:00
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unsigned int port;
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2016-04-25 04:38:34 -06:00
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if (!debounce_ms) {
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tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset),
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offset, 0);
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return 0;
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}
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debounce_ms = min(debounce_ms, 255U);
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port = GPIO_PORT(offset);
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/* There is only one debounce count register per port and hence
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* set the maximum of current and requested debounce time.
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*/
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spin_lock_irqsave(&bank->dbc_lock[port], flags);
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if (bank->dbc_cnt[port] < debounce_ms) {
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tegra_gpio_writel(tgi, debounce_ms, GPIO_DBC_CNT(tgi, offset));
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bank->dbc_cnt[port] = debounce_ms;
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}
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spin_unlock_irqrestore(&bank->dbc_lock[port], flags);
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tegra_gpio_mask_write(tgi, GPIO_MSK_DBC_EN(tgi, offset), offset, 1);
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return 0;
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}
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2017-01-23 05:34:34 -07:00
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static int tegra_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
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unsigned long config)
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{
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u32 debounce;
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if (pinconf_to_config_param(config) != PIN_CONFIG_INPUT_DEBOUNCE)
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return -ENOTSUPP;
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debounce = pinconf_to_config_argument(config);
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return tegra_gpio_set_debounce(chip, offset, debounce);
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}
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2017-07-24 08:55:07 -06:00
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static int tegra_gpio_to_irq(struct gpio_chip *chip, unsigned int offset)
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2011-08-22 17:39:56 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_info *tgi = gpiochip_get_data(chip);
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2010-03-15 20:40:06 -06:00
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2016-04-25 04:38:33 -06:00
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return irq_find_mapping(tgi->irq_domain, offset);
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}
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2010-03-15 20:40:06 -06:00
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2010-11-29 03:14:46 -07:00
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static void tegra_gpio_irq_ack(struct irq_data *d)
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2010-03-15 20:40:06 -06:00
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{
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2016-04-25 04:38:33 -06:00
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struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
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|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, 1 << GPIO_BIT(gpio), GPIO_INT_CLR(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2010-11-29 03:14:46 -07:00
|
|
|
static void tegra_gpio_irq_mask(struct irq_data *d)
|
2010-03-15 20:40:06 -06:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
|
|
|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 0);
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2010-11-29 03:14:46 -07:00
|
|
|
static void tegra_gpio_irq_unmask(struct irq_data *d)
|
2010-03-15 20:40:06 -06:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
|
|
|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_mask_write(tgi, GPIO_MSK_INT_ENB(tgi, gpio), gpio, 1);
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2010-11-29 03:14:46 -07:00
|
|
|
static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
|
2010-03-15 20:40:06 -06:00
|
|
|
{
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq, port = GPIO_PORT(gpio), lvl_type;
|
2010-11-29 03:14:46 -07:00
|
|
|
struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2010-03-15 20:40:06 -06:00
|
|
|
unsigned long flags;
|
2017-07-24 08:55:08 -06:00
|
|
|
u32 val;
|
2013-10-16 13:25:33 -06:00
|
|
|
int ret;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
switch (type & IRQ_TYPE_SENSE_MASK) {
|
|
|
|
case IRQ_TYPE_EDGE_RISING:
|
|
|
|
lvl_type = GPIO_INT_LVL_EDGE_RISING;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_FALLING:
|
|
|
|
lvl_type = GPIO_INT_LVL_EDGE_FALLING;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IRQ_TYPE_EDGE_BOTH:
|
|
|
|
lvl_type = GPIO_INT_LVL_EDGE_BOTH;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IRQ_TYPE_LEVEL_HIGH:
|
|
|
|
lvl_type = GPIO_INT_LVL_LEVEL_HIGH;
|
|
|
|
break;
|
|
|
|
|
|
|
|
case IRQ_TYPE_LEVEL_LOW:
|
|
|
|
lvl_type = GPIO_INT_LVL_LEVEL_LOW;
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
spin_lock_irqsave(&bank->lvl_lock[port], flags);
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
val = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
|
|
|
|
val |= lvl_type << GPIO_BIT(gpio);
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, val, GPIO_INT_LVL(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_mask_write(tgi, GPIO_MSK_OE(tgi, gpio), gpio, 0);
|
|
|
|
tegra_gpio_enable(tgi, gpio);
|
2012-03-19 10:31:58 -06:00
|
|
|
|
2018-07-17 10:10:38 -06:00
|
|
|
ret = gpiochip_lock_as_irq(&tgi->gc, gpio);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(tgi->dev,
|
|
|
|
"unable to lock Tegra GPIO %u as IRQ\n", gpio);
|
|
|
|
tegra_gpio_disable(tgi, gpio);
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2010-03-15 20:40:06 -06:00
|
|
|
if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
|
2015-06-23 07:52:40 -06:00
|
|
|
irq_set_handler_locked(d, handle_level_irq);
|
2010-03-15 20:40:06 -06:00
|
|
|
else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
|
2015-06-23 07:52:40 -06:00
|
|
|
irq_set_handler_locked(d, handle_edge_irq);
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2013-10-16 13:25:33 -06:00
|
|
|
static void tegra_gpio_irq_shutdown(struct irq_data *d)
|
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
|
|
|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq;
|
2013-10-16 13:25:33 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
gpiochip_unlock_as_irq(&tgi->gc, gpio);
|
2013-10-16 13:25:33 -06:00
|
|
|
}
|
|
|
|
|
2015-09-14 02:42:37 -06:00
|
|
|
static void tegra_gpio_irq_handler(struct irq_desc *desc)
|
2010-03-15 20:40:06 -06:00
|
|
|
{
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int port, pin, gpio;
|
2017-07-18 06:35:45 -06:00
|
|
|
bool unmasked = false;
|
2016-04-25 04:38:33 -06:00
|
|
|
u32 lvl;
|
|
|
|
unsigned long sta;
|
2011-02-21 06:58:10 -07:00
|
|
|
struct irq_chip *chip = irq_desc_get_chip(desc);
|
2015-06-03 22:13:15 -06:00
|
|
|
struct tegra_gpio_bank *bank = irq_desc_get_handler_data(desc);
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_info *tgi = bank->tgi;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2011-02-21 06:58:10 -07:00
|
|
|
chained_irq_enter(chip, desc);
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
for (port = 0; port < 4; port++) {
|
2016-04-25 04:38:33 -06:00
|
|
|
gpio = tegra_gpio_compose(bank->bank, port, 0);
|
|
|
|
sta = tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)) &
|
|
|
|
tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio));
|
|
|
|
lvl = tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
for_each_set_bit(pin, &sta, 8) {
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, 1 << pin,
|
|
|
|
GPIO_INT_CLR(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
/* if gpio is edge triggered, clear condition
|
2015-05-18 12:41:43 -06:00
|
|
|
* before executing the handler so that we don't
|
2010-03-15 20:40:06 -06:00
|
|
|
* miss edges
|
|
|
|
*/
|
2017-07-18 06:35:45 -06:00
|
|
|
if (!unmasked && lvl & (0x100 << pin)) {
|
|
|
|
unmasked = true;
|
2011-02-21 06:58:10 -07:00
|
|
|
chained_irq_exit(chip, desc);
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2017-07-08 16:44:11 -06:00
|
|
|
generic_handle_irq(irq_find_mapping(tgi->irq_domain,
|
|
|
|
gpio + pin));
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!unmasked)
|
2011-02-21 06:58:10 -07:00
|
|
|
chained_irq_exit(chip, desc);
|
2010-03-15 20:40:06 -06:00
|
|
|
|
|
|
|
}
|
|
|
|
|
2012-11-07 08:01:32 -07:00
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int tegra_gpio_resume(struct device *dev)
|
2010-04-07 13:59:42 -06:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
|
2010-04-07 13:59:42 -06:00
|
|
|
unsigned long flags;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int b, p;
|
2010-04-07 13:59:42 -06:00
|
|
|
|
|
|
|
local_irq_save(flags);
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (b = 0; b < tgi->bank_count; b++) {
|
|
|
|
struct tegra_gpio_bank *bank = &tgi->bank_info[b];
|
2010-04-07 13:59:42 -06:00
|
|
|
|
|
|
|
for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
|
2017-07-24 08:55:07 -06:00
|
|
|
unsigned int gpio = (b << 5) | (p << 3);
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, bank->cnf[p],
|
|
|
|
GPIO_CNF(tgi, gpio));
|
2016-04-25 04:38:34 -06:00
|
|
|
|
|
|
|
if (tgi->soc->debounce_supported) {
|
|
|
|
tegra_gpio_writel(tgi, bank->dbc_cnt[p],
|
|
|
|
GPIO_DBC_CNT(tgi, gpio));
|
|
|
|
tegra_gpio_writel(tgi, bank->dbc_enb[p],
|
|
|
|
GPIO_MSK_DBC_EN(tgi, gpio));
|
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, bank->out[p],
|
|
|
|
GPIO_OUT(tgi, gpio));
|
|
|
|
tegra_gpio_writel(tgi, bank->oe[p],
|
|
|
|
GPIO_OE(tgi, gpio));
|
|
|
|
tegra_gpio_writel(tgi, bank->int_lvl[p],
|
|
|
|
GPIO_INT_LVL(tgi, gpio));
|
|
|
|
tegra_gpio_writel(tgi, bank->int_enb[p],
|
|
|
|
GPIO_INT_ENB(tgi, gpio));
|
2010-04-07 13:59:42 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
local_irq_restore(flags);
|
2012-11-07 08:01:32 -07:00
|
|
|
return 0;
|
2010-04-07 13:59:42 -06:00
|
|
|
}
|
|
|
|
|
2012-11-07 08:01:32 -07:00
|
|
|
static int tegra_gpio_suspend(struct device *dev)
|
2010-04-07 13:59:42 -06:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
|
|
struct tegra_gpio_info *tgi = platform_get_drvdata(pdev);
|
2010-04-07 13:59:42 -06:00
|
|
|
unsigned long flags;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int b, p;
|
2010-04-07 13:59:42 -06:00
|
|
|
|
|
|
|
local_irq_save(flags);
|
2016-04-25 04:38:33 -06:00
|
|
|
for (b = 0; b < tgi->bank_count; b++) {
|
|
|
|
struct tegra_gpio_bank *bank = &tgi->bank_info[b];
|
2010-04-07 13:59:42 -06:00
|
|
|
|
|
|
|
for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
|
2017-07-24 08:55:07 -06:00
|
|
|
unsigned int gpio = (b << 5) | (p << 3);
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
bank->cnf[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_CNF(tgi, gpio));
|
|
|
|
bank->out[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_OUT(tgi, gpio));
|
|
|
|
bank->oe[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_OE(tgi, gpio));
|
2016-04-25 04:38:34 -06:00
|
|
|
if (tgi->soc->debounce_supported) {
|
|
|
|
bank->dbc_enb[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_MSK_DBC_EN(tgi, gpio));
|
|
|
|
bank->dbc_enb[p] = (bank->dbc_enb[p] << 8) |
|
|
|
|
bank->dbc_enb[p];
|
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
bank->int_enb[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_INT_ENB(tgi, gpio));
|
|
|
|
bank->int_lvl[p] = tegra_gpio_readl(tgi,
|
|
|
|
GPIO_INT_LVL(tgi, gpio));
|
2013-04-03 05:31:44 -06:00
|
|
|
|
|
|
|
/* Enable gpio irq for wake up source */
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, bank->wake_enb[p],
|
|
|
|
GPIO_INT_ENB(tgi, gpio));
|
2010-04-07 13:59:42 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
local_irq_restore(flags);
|
2012-11-07 08:01:32 -07:00
|
|
|
return 0;
|
2010-04-07 13:59:42 -06:00
|
|
|
}
|
|
|
|
|
2013-04-03 05:31:44 -06:00
|
|
|
static int tegra_gpio_irq_set_wake(struct irq_data *d, unsigned int enable)
|
2010-04-07 13:59:42 -06:00
|
|
|
{
|
2010-11-29 03:14:46 -07:00
|
|
|
struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = d->hwirq;
|
2013-04-03 05:31:44 -06:00
|
|
|
u32 port, bit, mask;
|
|
|
|
|
|
|
|
port = GPIO_PORT(gpio);
|
|
|
|
bit = GPIO_BIT(gpio);
|
|
|
|
mask = BIT(bit);
|
|
|
|
|
|
|
|
if (enable)
|
|
|
|
bank->wake_enb[port] |= mask;
|
|
|
|
else
|
|
|
|
bank->wake_enb[port] &= ~mask;
|
|
|
|
|
2011-03-24 06:25:22 -06:00
|
|
|
return irq_set_irq_wake(bank->irq, enable);
|
2010-04-07 13:59:42 -06:00
|
|
|
}
|
|
|
|
#endif
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2015-11-16 09:07:10 -07:00
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
|
|
|
|
|
|
#include <linux/debugfs.h>
|
|
|
|
#include <linux/seq_file.h>
|
|
|
|
|
2018-02-12 07:01:57 -07:00
|
|
|
static int tegra_dbg_gpio_show(struct seq_file *s, void *unused)
|
2015-11-16 09:07:10 -07:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_info *tgi = s->private;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int i, j;
|
2015-11-16 09:07:10 -07:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (i = 0; i < tgi->bank_count; i++) {
|
2015-11-16 09:07:10 -07:00
|
|
|
for (j = 0; j < 4; j++) {
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio = tegra_gpio_compose(i, j, 0);
|
2017-07-24 08:55:07 -06:00
|
|
|
|
2015-11-16 09:07:10 -07:00
|
|
|
seq_printf(s,
|
2017-07-24 08:55:08 -06:00
|
|
|
"%u:%u %02x %02x %02x %02x %02x %02x %06x\n",
|
2015-11-16 09:07:10 -07:00
|
|
|
i, j,
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_readl(tgi, GPIO_CNF(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_OE(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_OUT(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_IN(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_INT_STA(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_INT_ENB(tgi, gpio)),
|
|
|
|
tegra_gpio_readl(tgi, GPIO_INT_LVL(tgi, gpio)));
|
2015-11-16 09:07:10 -07:00
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2018-02-12 07:01:57 -07:00
|
|
|
DEFINE_SHOW_ATTRIBUTE(tegra_dbg_gpio);
|
2015-11-16 09:07:10 -07:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
static void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
|
2015-11-16 09:07:10 -07:00
|
|
|
{
|
2017-07-24 08:55:07 -06:00
|
|
|
(void) debugfs_create_file("tegra_gpio", 0444,
|
2018-02-12 07:01:57 -07:00
|
|
|
NULL, tgi, &tegra_dbg_gpio_fops);
|
2015-11-16 09:07:10 -07:00
|
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
static inline void tegra_gpio_debuginit(struct tegra_gpio_info *tgi)
|
2015-11-16 09:07:10 -07:00
|
|
|
{
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif
|
|
|
|
|
2012-11-07 08:01:32 -07:00
|
|
|
static const struct dev_pm_ops tegra_gpio_pm_ops = {
|
|
|
|
SET_SYSTEM_SLEEP_PM_OPS(tegra_gpio_suspend, tegra_gpio_resume)
|
|
|
|
};
|
|
|
|
|
2012-11-19 11:22:34 -07:00
|
|
|
static int tegra_gpio_probe(struct platform_device *pdev)
|
2010-03-15 20:40:06 -06:00
|
|
|
{
|
2016-04-25 04:38:33 -06:00
|
|
|
struct tegra_gpio_info *tgi;
|
2011-10-11 16:16:14 -06:00
|
|
|
struct resource *res;
|
2010-03-15 20:40:06 -06:00
|
|
|
struct tegra_gpio_bank *bank;
|
2017-07-24 08:55:08 -06:00
|
|
|
unsigned int gpio, i, j;
|
2013-12-06 13:36:11 -07:00
|
|
|
int ret;
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi = devm_kzalloc(&pdev->dev, sizeof(*tgi), GFP_KERNEL);
|
|
|
|
if (!tgi)
|
|
|
|
return -ENODEV;
|
|
|
|
|
2017-07-24 08:55:05 -06:00
|
|
|
tgi->soc = of_device_get_match_data(&pdev->dev);
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi->dev = &pdev->dev;
|
2012-03-16 17:35:08 -06:00
|
|
|
|
2017-07-20 10:00:56 -06:00
|
|
|
ret = platform_irq_count(pdev);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
tgi->bank_count = ret;
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
if (!tgi->bank_count) {
|
2012-01-19 01:16:35 -07:00
|
|
|
dev_err(&pdev->dev, "Missing IRQ resource\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi->gc.label = "tegra-gpio";
|
|
|
|
tgi->gc.request = tegra_gpio_request;
|
|
|
|
tgi->gc.free = tegra_gpio_free;
|
|
|
|
tgi->gc.direction_input = tegra_gpio_direction_input;
|
|
|
|
tgi->gc.get = tegra_gpio_get;
|
|
|
|
tgi->gc.direction_output = tegra_gpio_direction_output;
|
|
|
|
tgi->gc.set = tegra_gpio_set;
|
2016-04-29 10:25:23 -06:00
|
|
|
tgi->gc.get_direction = tegra_gpio_get_direction;
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi->gc.to_irq = tegra_gpio_to_irq;
|
|
|
|
tgi->gc.base = 0;
|
|
|
|
tgi->gc.ngpio = tgi->bank_count * 32;
|
|
|
|
tgi->gc.parent = &pdev->dev;
|
|
|
|
tgi->gc.of_node = pdev->dev.of_node;
|
|
|
|
|
|
|
|
tgi->ic.name = "GPIO";
|
|
|
|
tgi->ic.irq_ack = tegra_gpio_irq_ack;
|
|
|
|
tgi->ic.irq_mask = tegra_gpio_irq_mask;
|
|
|
|
tgi->ic.irq_unmask = tegra_gpio_irq_unmask;
|
|
|
|
tgi->ic.irq_set_type = tegra_gpio_irq_set_type;
|
|
|
|
tgi->ic.irq_shutdown = tegra_gpio_irq_shutdown;
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
tgi->ic.irq_set_wake = tegra_gpio_irq_set_wake;
|
|
|
|
#endif
|
|
|
|
|
|
|
|
platform_set_drvdata(pdev, tgi);
|
2012-01-19 01:16:35 -07:00
|
|
|
|
2017-07-24 08:55:05 -06:00
|
|
|
if (tgi->soc->debounce_supported)
|
2017-01-23 05:34:34 -07:00
|
|
|
tgi->gc.set_config = tegra_gpio_set_config;
|
2016-04-25 04:38:34 -06:00
|
|
|
|
2017-07-24 08:55:06 -06:00
|
|
|
tgi->bank_info = devm_kcalloc(&pdev->dev, tgi->bank_count,
|
2016-04-25 04:38:33 -06:00
|
|
|
sizeof(*tgi->bank_info), GFP_KERNEL);
|
|
|
|
if (!tgi->bank_info)
|
2017-07-24 08:55:06 -06:00
|
|
|
return -ENOMEM;
|
2012-01-19 01:16:35 -07:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi->irq_domain = irq_domain_add_linear(pdev->dev.of_node,
|
|
|
|
tgi->gc.ngpio,
|
|
|
|
&irq_domain_simple_ops, NULL);
|
|
|
|
if (!tgi->irq_domain)
|
2012-10-16 13:00:09 -06:00
|
|
|
return -ENODEV;
|
2012-01-04 01:39:37 -07:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (i = 0; i < tgi->bank_count; i++) {
|
2017-07-20 10:00:57 -06:00
|
|
|
ret = platform_get_irq(pdev, i);
|
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&pdev->dev, "Missing IRQ resource: %d\n", ret);
|
|
|
|
return ret;
|
2011-10-11 16:16:14 -06:00
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
bank = &tgi->bank_info[i];
|
2011-10-11 16:16:14 -06:00
|
|
|
bank->bank = i;
|
2017-07-20 10:00:57 -06:00
|
|
|
bank->irq = ret;
|
2016-04-25 04:38:33 -06:00
|
|
|
bank->tgi = tgi;
|
2011-10-11 16:16:14 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
2016-04-25 04:38:33 -06:00
|
|
|
tgi->regs = devm_ioremap_resource(&pdev->dev, res);
|
|
|
|
if (IS_ERR(tgi->regs))
|
|
|
|
return PTR_ERR(tgi->regs);
|
2011-10-11 16:16:14 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (i = 0; i < tgi->bank_count; i++) {
|
2010-03-15 20:40:06 -06:00
|
|
|
for (j = 0; j < 4; j++) {
|
|
|
|
int gpio = tegra_gpio_compose(i, j, 0);
|
2017-07-24 08:55:07 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_writel(tgi, 0x00, GPIO_INT_ENB(tgi, gpio));
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
ret = devm_gpiochip_add_data(&pdev->dev, &tgi->gc, tgi);
|
2013-12-06 13:36:11 -07:00
|
|
|
if (ret < 0) {
|
2016-04-25 04:38:33 -06:00
|
|
|
irq_domain_remove(tgi->irq_domain);
|
2013-12-06 13:36:11 -07:00
|
|
|
return ret;
|
|
|
|
}
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (gpio = 0; gpio < tgi->gc.ngpio; gpio++) {
|
|
|
|
int irq = irq_create_mapping(tgi->irq_domain, gpio);
|
2011-08-22 17:39:55 -06:00
|
|
|
/* No validity check; all Tegra GPIOs are valid IRQs */
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
bank = &tgi->bank_info[GPIO_BANK(gpio)];
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2011-08-22 17:39:55 -06:00
|
|
|
irq_set_chip_data(irq, bank);
|
2016-04-25 04:38:33 -06:00
|
|
|
irq_set_chip_and_handler(irq, &tgi->ic, handle_simple_irq);
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
for (i = 0; i < tgi->bank_count; i++) {
|
|
|
|
bank = &tgi->bank_info[i];
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2015-06-16 16:06:50 -06:00
|
|
|
irq_set_chained_handler_and_data(bank->irq,
|
|
|
|
tegra_gpio_irq_handler, bank);
|
2010-03-15 20:40:06 -06:00
|
|
|
|
2016-04-25 04:38:34 -06:00
|
|
|
for (j = 0; j < 4; j++) {
|
2010-03-15 20:40:06 -06:00
|
|
|
spin_lock_init(&bank->lvl_lock[j]);
|
2016-04-25 04:38:34 -06:00
|
|
|
spin_lock_init(&bank->dbc_lock[j]);
|
|
|
|
}
|
2010-03-15 20:40:06 -06:00
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:33 -06:00
|
|
|
tegra_gpio_debuginit(tgi);
|
2015-11-16 09:07:10 -07:00
|
|
|
|
2010-03-15 20:40:06 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-04-25 04:38:32 -06:00
|
|
|
static const struct tegra_gpio_soc_config tegra20_gpio_config = {
|
2016-04-25 04:38:31 -06:00
|
|
|
.bank_stride = 0x80,
|
|
|
|
.upper_offset = 0x800,
|
|
|
|
};
|
|
|
|
|
2016-04-25 04:38:32 -06:00
|
|
|
static const struct tegra_gpio_soc_config tegra30_gpio_config = {
|
2016-04-25 04:38:31 -06:00
|
|
|
.bank_stride = 0x100,
|
|
|
|
.upper_offset = 0x80,
|
|
|
|
};
|
|
|
|
|
2016-04-25 04:38:34 -06:00
|
|
|
static const struct tegra_gpio_soc_config tegra210_gpio_config = {
|
|
|
|
.debounce_supported = true,
|
|
|
|
.bank_stride = 0x100,
|
|
|
|
.upper_offset = 0x80,
|
|
|
|
};
|
|
|
|
|
2016-04-25 04:38:31 -06:00
|
|
|
static const struct of_device_id tegra_gpio_of_match[] = {
|
2016-04-25 04:38:34 -06:00
|
|
|
{ .compatible = "nvidia,tegra210-gpio", .data = &tegra210_gpio_config },
|
2016-04-25 04:38:31 -06:00
|
|
|
{ .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config },
|
|
|
|
{ .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config },
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
|
2011-10-11 16:16:14 -06:00
|
|
|
static struct platform_driver tegra_gpio_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = "tegra-gpio",
|
2012-11-07 08:01:32 -07:00
|
|
|
.pm = &tegra_gpio_pm_ops,
|
2011-10-11 16:16:14 -06:00
|
|
|
.of_match_table = tegra_gpio_of_match,
|
|
|
|
},
|
|
|
|
.probe = tegra_gpio_probe,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int __init tegra_gpio_init(void)
|
|
|
|
{
|
|
|
|
return platform_driver_register(&tegra_gpio_driver);
|
|
|
|
}
|
2010-03-15 20:40:06 -06:00
|
|
|
postcore_initcall(tegra_gpio_init);
|