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Diffstat (limited to 'arch/arm/mach-tegra/gpio.c')
-rw-r--r--arch/arm/mach-tegra/gpio.c431
1 files changed, 0 insertions, 431 deletions
diff --git a/arch/arm/mach-tegra/gpio.c b/arch/arm/mach-tegra/gpio.c
deleted file mode 100644
index 919d638..0000000
--- a/arch/arm/mach-tegra/gpio.c
+++ /dev/null
@@ -1,431 +0,0 @@
-/*
- * arch/arm/mach-tegra/gpio.c
- *
- * Copyright (c) 2010 Google, Inc
- *
- * Author:
- * Erik Gilling <konkers@google.com>
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/init.h>
-#include <linux/irq.h>
-#include <linux/interrupt.h>
-
-#include <linux/io.h>
-#include <linux/gpio.h>
-
-#include <asm/mach/irq.h>
-
-#include <mach/iomap.h>
-#include <mach/suspend.h>
-
-#define GPIO_BANK(x) ((x) >> 5)
-#define GPIO_PORT(x) (((x) >> 3) & 0x3)
-#define GPIO_BIT(x) ((x) & 0x7)
-
-#define GPIO_REG(x) (IO_TO_VIRT(TEGRA_GPIO_BASE) + \
- GPIO_BANK(x) * 0x80 + \
- GPIO_PORT(x) * 4)
-
-#define GPIO_CNF(x) (GPIO_REG(x) + 0x00)
-#define GPIO_OE(x) (GPIO_REG(x) + 0x10)
-#define GPIO_OUT(x) (GPIO_REG(x) + 0X20)
-#define GPIO_IN(x) (GPIO_REG(x) + 0x30)
-#define GPIO_INT_STA(x) (GPIO_REG(x) + 0x40)
-#define GPIO_INT_ENB(x) (GPIO_REG(x) + 0x50)
-#define GPIO_INT_LVL(x) (GPIO_REG(x) + 0x60)
-#define GPIO_INT_CLR(x) (GPIO_REG(x) + 0x70)
-
-#define GPIO_MSK_CNF(x) (GPIO_REG(x) + 0x800)
-#define GPIO_MSK_OE(x) (GPIO_REG(x) + 0x810)
-#define GPIO_MSK_OUT(x) (GPIO_REG(x) + 0X820)
-#define GPIO_MSK_INT_STA(x) (GPIO_REG(x) + 0x840)
-#define GPIO_MSK_INT_ENB(x) (GPIO_REG(x) + 0x850)
-#define GPIO_MSK_INT_LVL(x) (GPIO_REG(x) + 0x860)
-
-#define GPIO_INT_LVL_MASK 0x010101
-#define GPIO_INT_LVL_EDGE_RISING 0x000101
-#define GPIO_INT_LVL_EDGE_FALLING 0x000100
-#define GPIO_INT_LVL_EDGE_BOTH 0x010100
-#define GPIO_INT_LVL_LEVEL_HIGH 0x000001
-#define GPIO_INT_LVL_LEVEL_LOW 0x000000
-
-struct tegra_gpio_bank {
- int bank;
- int irq;
- spinlock_t lvl_lock[4];
-#ifdef CONFIG_PM
- u32 cnf[4];
- u32 out[4];
- u32 oe[4];
- u32 int_enb[4];
- u32 int_lvl[4];
-#endif
-};
-
-
-static struct tegra_gpio_bank tegra_gpio_banks[] = {
- {.bank = 0, .irq = INT_GPIO1},
- {.bank = 1, .irq = INT_GPIO2},
- {.bank = 2, .irq = INT_GPIO3},
- {.bank = 3, .irq = INT_GPIO4},
- {.bank = 4, .irq = INT_GPIO5},
- {.bank = 5, .irq = INT_GPIO6},
- {.bank = 6, .irq = INT_GPIO7},
-};
-
-static int tegra_gpio_compose(int bank, int port, int bit)
-{
- return (bank << 5) | ((port & 0x3) << 3) | (bit & 0x7);
-}
-
-static void tegra_gpio_mask_write(u32 reg, int gpio, int value)
-{
- u32 val;
-
- val = 0x100 << GPIO_BIT(gpio);
- if (value)
- val |= 1 << GPIO_BIT(gpio);
- __raw_writel(val, reg);
-}
-
-void tegra_gpio_enable(int gpio)
-{
- tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 1);
-}
-
-void tegra_gpio_disable(int gpio)
-{
- tegra_gpio_mask_write(GPIO_MSK_CNF(gpio), gpio, 0);
-}
-
-static void tegra_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- tegra_gpio_mask_write(GPIO_MSK_OUT(offset), offset, value);
-}
-
-static int tegra_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- return (__raw_readl(GPIO_IN(offset)) >> GPIO_BIT(offset)) & 0x1;
-}
-
-static int tegra_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 0);
- return 0;
-}
-
-static int tegra_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
- int value)
-{
- tegra_gpio_set(chip, offset, value);
- tegra_gpio_mask_write(GPIO_MSK_OE(offset), offset, 1);
- return 0;
-}
-
-
-
-static struct gpio_chip tegra_gpio_chip = {
- .label = "tegra-gpio",
- .direction_input = tegra_gpio_direction_input,
- .get = tegra_gpio_get,
- .direction_output = tegra_gpio_direction_output,
- .set = tegra_gpio_set,
- .base = 0,
- .ngpio = TEGRA_NR_GPIOS,
-};
-
-static void tegra_gpio_irq_ack(struct irq_data *d)
-{
- int gpio = d->irq - INT_GPIO_BASE;
-
- __raw_writel(1 << GPIO_BIT(gpio), GPIO_INT_CLR(gpio));
-}
-
-static void tegra_gpio_irq_mask(struct irq_data *d)
-{
- int gpio = d->irq - INT_GPIO_BASE;
-
- tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 0);
-}
-
-static void tegra_gpio_irq_unmask(struct irq_data *d)
-{
- int gpio = d->irq - INT_GPIO_BASE;
-
- tegra_gpio_mask_write(GPIO_MSK_INT_ENB(gpio), gpio, 1);
-}
-
-static int tegra_gpio_irq_set_type(struct irq_data *d, unsigned int type)
-{
- int gpio = d->irq - INT_GPIO_BASE;
- struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
- int port = GPIO_PORT(gpio);
- int lvl_type;
- int val;
- unsigned long flags;
-
- 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);
-
- val = __raw_readl(GPIO_INT_LVL(gpio));
- val &= ~(GPIO_INT_LVL_MASK << GPIO_BIT(gpio));
- val |= lvl_type << GPIO_BIT(gpio);
- __raw_writel(val, GPIO_INT_LVL(gpio));
-
- spin_unlock_irqrestore(&bank->lvl_lock[port], flags);
-
- if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
- __irq_set_handler_locked(d->irq, handle_level_irq);
- else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
- __irq_set_handler_locked(d->irq, handle_edge_irq);
-
- return 0;
-}
-
-static void tegra_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
-{
- struct tegra_gpio_bank *bank;
- int port;
- int pin;
- int unmasked = 0;
- struct irq_chip *chip = irq_desc_get_chip(desc);
-
- chained_irq_enter(chip, desc);
-
- bank = irq_get_handler_data(irq);
-
- for (port = 0; port < 4; port++) {
- int gpio = tegra_gpio_compose(bank->bank, port, 0);
- unsigned long sta = __raw_readl(GPIO_INT_STA(gpio)) &
- __raw_readl(GPIO_INT_ENB(gpio));
- u32 lvl = __raw_readl(GPIO_INT_LVL(gpio));
-
- for_each_set_bit(pin, &sta, 8) {
- __raw_writel(1 << pin, GPIO_INT_CLR(gpio));
-
- /* if gpio is edge triggered, clear condition
- * before executing the hander so that we don't
- * miss edges
- */
- if (lvl & (0x100 << pin)) {
- unmasked = 1;
- chained_irq_exit(chip, desc);
- }
-
- generic_handle_irq(gpio_to_irq(gpio + pin));
- }
- }
-
- if (!unmasked)
- chained_irq_exit(chip, desc);
-
-}
-
-#ifdef CONFIG_PM
-void tegra_gpio_resume(void)
-{
- unsigned long flags;
- int b;
- int p;
-
- local_irq_save(flags);
-
- for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
- struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
-
- for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
- unsigned int gpio = (b<<5) | (p<<3);
- __raw_writel(bank->cnf[p], GPIO_CNF(gpio));
- __raw_writel(bank->out[p], GPIO_OUT(gpio));
- __raw_writel(bank->oe[p], GPIO_OE(gpio));
- __raw_writel(bank->int_lvl[p], GPIO_INT_LVL(gpio));
- __raw_writel(bank->int_enb[p], GPIO_INT_ENB(gpio));
- }
- }
-
- local_irq_restore(flags);
-}
-
-void tegra_gpio_suspend(void)
-{
- unsigned long flags;
- int b;
- int p;
-
- local_irq_save(flags);
- for (b = 0; b < ARRAY_SIZE(tegra_gpio_banks); b++) {
- struct tegra_gpio_bank *bank = &tegra_gpio_banks[b];
-
- for (p = 0; p < ARRAY_SIZE(bank->oe); p++) {
- unsigned int gpio = (b<<5) | (p<<3);
- bank->cnf[p] = __raw_readl(GPIO_CNF(gpio));
- bank->out[p] = __raw_readl(GPIO_OUT(gpio));
- bank->oe[p] = __raw_readl(GPIO_OE(gpio));
- bank->int_enb[p] = __raw_readl(GPIO_INT_ENB(gpio));
- bank->int_lvl[p] = __raw_readl(GPIO_INT_LVL(gpio));
- }
- }
- local_irq_restore(flags);
-}
-
-static int tegra_gpio_wake_enable(struct irq_data *d, unsigned int enable)
-{
- struct tegra_gpio_bank *bank = irq_data_get_irq_chip_data(d);
- return irq_set_irq_wake(bank->irq, enable);
-}
-#endif
-
-static struct irq_chip tegra_gpio_irq_chip = {
- .name = "GPIO",
- .irq_ack = tegra_gpio_irq_ack,
- .irq_mask = tegra_gpio_irq_mask,
- .irq_unmask = tegra_gpio_irq_unmask,
- .irq_set_type = tegra_gpio_irq_set_type,
-#ifdef CONFIG_PM
- .irq_set_wake = tegra_gpio_wake_enable,
-#endif
-};
-
-
-/* This lock class tells lockdep that GPIO irqs are in a different
- * category than their parents, so it won't report false recursion.
- */
-static struct lock_class_key gpio_lock_class;
-
-static int __init tegra_gpio_init(void)
-{
- struct tegra_gpio_bank *bank;
- int i;
- int j;
-
- for (i = 0; i < 7; i++) {
- for (j = 0; j < 4; j++) {
- int gpio = tegra_gpio_compose(i, j, 0);
- __raw_writel(0x00, GPIO_INT_ENB(gpio));
- }
- }
-
- gpiochip_add(&tegra_gpio_chip);
-
- for (i = INT_GPIO_BASE; i < (INT_GPIO_BASE + TEGRA_NR_GPIOS); i++) {
- bank = &tegra_gpio_banks[GPIO_BANK(irq_to_gpio(i))];
-
- irq_set_lockdep_class(i, &gpio_lock_class);
- irq_set_chip_data(i, bank);
- irq_set_chip_and_handler(i, &tegra_gpio_irq_chip,
- handle_simple_irq);
- set_irq_flags(i, IRQF_VALID);
- }
-
- for (i = 0; i < ARRAY_SIZE(tegra_gpio_banks); i++) {
- bank = &tegra_gpio_banks[i];
-
- irq_set_chained_handler(bank->irq, tegra_gpio_irq_handler);
- irq_set_handler_data(bank->irq, bank);
-
- for (j = 0; j < 4; j++)
- spin_lock_init(&bank->lvl_lock[j]);
- }
-
- return 0;
-}
-
-postcore_initcall(tegra_gpio_init);
-
-void __init tegra_gpio_config(struct tegra_gpio_table *table, int num)
-{
- int i;
-
- for (i = 0; i < num; i++) {
- int gpio = table[i].gpio;
-
- if (table[i].enable)
- tegra_gpio_enable(gpio);
- else
- tegra_gpio_disable(gpio);
- }
-}
-
-#ifdef CONFIG_DEBUG_FS
-
-#include <linux/debugfs.h>
-#include <linux/seq_file.h>
-
-static int dbg_gpio_show(struct seq_file *s, void *unused)
-{
- int i;
- int j;
-
- for (i = 0; i < 7; i++) {
- for (j = 0; j < 4; j++) {
- int gpio = tegra_gpio_compose(i, j, 0);
- seq_printf(s,
- "%d:%d %02x %02x %02x %02x %02x %02x %06x\n",
- i, j,
- __raw_readl(GPIO_CNF(gpio)),
- __raw_readl(GPIO_OE(gpio)),
- __raw_readl(GPIO_OUT(gpio)),
- __raw_readl(GPIO_IN(gpio)),
- __raw_readl(GPIO_INT_STA(gpio)),
- __raw_readl(GPIO_INT_ENB(gpio)),
- __raw_readl(GPIO_INT_LVL(gpio)));
- }
- }
- return 0;
-}
-
-static int dbg_gpio_open(struct inode *inode, struct file *file)
-{
- return single_open(file, dbg_gpio_show, &inode->i_private);
-}
-
-static const struct file_operations debug_fops = {
- .open = dbg_gpio_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int __init tegra_gpio_debuginit(void)
-{
- (void) debugfs_create_file("tegra_gpio", S_IRUGO,
- NULL, NULL, &debug_fops);
- return 0;
-}
-late_initcall(tegra_gpio_debuginit);
-#endif
generated by cgit v1.1 at 2024-04-19 13:21:38 +0000