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Diffstat (limited to 'arch/arm/mach-gemini/gpio.c')
-rw-r--r--arch/arm/mach-gemini/gpio.c231
1 files changed, 0 insertions, 231 deletions
diff --git a/arch/arm/mach-gemini/gpio.c b/arch/arm/mach-gemini/gpio.c
deleted file mode 100644
index 469a76ea0459..000000000000
--- a/arch/arm/mach-gemini/gpio.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * Gemini gpiochip and interrupt routines
- *
- * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
- *
- * Based on plat-mxc/gpio.c:
- * MXC GPIO support. (c) 2008 Daniel Mack <daniel@caiaq.de>
- * Copyright 2008 Juergen Beisert, kernel@pengutronix.de
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/gpio/driver.h>
-
-#include <mach/hardware.h>
-#include <mach/irqs.h>
-
-#define GPIO_BASE(x) IO_ADDRESS(GEMINI_GPIO_BASE(x))
-#define irq_to_gpio(x) ((x) - GPIO_IRQ_BASE)
-
-/* GPIO registers definition */
-#define GPIO_DATA_OUT 0x0
-#define GPIO_DATA_IN 0x4
-#define GPIO_DIR 0x8
-#define GPIO_DATA_SET 0x10
-#define GPIO_DATA_CLR 0x14
-#define GPIO_PULL_EN 0x18
-#define GPIO_PULL_TYPE 0x1C
-#define GPIO_INT_EN 0x20
-#define GPIO_INT_STAT 0x24
-#define GPIO_INT_MASK 0x2C
-#define GPIO_INT_CLR 0x30
-#define GPIO_INT_TYPE 0x34
-#define GPIO_INT_BOTH_EDGE 0x38
-#define GPIO_INT_LEVEL 0x3C
-#define GPIO_DEBOUNCE_EN 0x40
-#define GPIO_DEBOUNCE_PRESCALE 0x44
-
-#define GPIO_PORT_NUM 3
-
-static void _set_gpio_irqenable(void __iomem *base, unsigned int index,
- int enable)
-{
- unsigned int reg;
-
- reg = __raw_readl(base + GPIO_INT_EN);
- reg = (reg & (~(1 << index))) | (!!enable << index);
- __raw_writel(reg, base + GPIO_INT_EN);
-}
-
-static void gpio_ack_irq(struct irq_data *d)
-{
- unsigned int gpio = irq_to_gpio(d->irq);
- void __iomem *base = GPIO_BASE(gpio / 32);
-
- __raw_writel(1 << (gpio % 32), base + GPIO_INT_CLR);
-}
-
-static void gpio_mask_irq(struct irq_data *d)
-{
- unsigned int gpio = irq_to_gpio(d->irq);
- void __iomem *base = GPIO_BASE(gpio / 32);
-
- _set_gpio_irqenable(base, gpio % 32, 0);
-}
-
-static void gpio_unmask_irq(struct irq_data *d)
-{
- unsigned int gpio = irq_to_gpio(d->irq);
- void __iomem *base = GPIO_BASE(gpio / 32);
-
- _set_gpio_irqenable(base, gpio % 32, 1);
-}
-
-static int gpio_set_irq_type(struct irq_data *d, unsigned int type)
-{
- unsigned int gpio = irq_to_gpio(d->irq);
- unsigned int gpio_mask = 1 << (gpio % 32);
- void __iomem *base = GPIO_BASE(gpio / 32);
- unsigned int reg_both, reg_level, reg_type;
-
- reg_type = __raw_readl(base + GPIO_INT_TYPE);
- reg_level = __raw_readl(base + GPIO_INT_LEVEL);
- reg_both = __raw_readl(base + GPIO_INT_BOTH_EDGE);
-
- switch (type) {
- case IRQ_TYPE_EDGE_BOTH:
- reg_type &= ~gpio_mask;
- reg_both |= gpio_mask;
- break;
- case IRQ_TYPE_EDGE_RISING:
- reg_type &= ~gpio_mask;
- reg_both &= ~gpio_mask;
- reg_level &= ~gpio_mask;
- break;
- case IRQ_TYPE_EDGE_FALLING:
- reg_type &= ~gpio_mask;
- reg_both &= ~gpio_mask;
- reg_level |= gpio_mask;
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- reg_type |= gpio_mask;
- reg_level &= ~gpio_mask;
- break;
- case IRQ_TYPE_LEVEL_LOW:
- reg_type |= gpio_mask;
- reg_level |= gpio_mask;
- break;
- default:
- return -EINVAL;
- }
-
- __raw_writel(reg_type, base + GPIO_INT_TYPE);
- __raw_writel(reg_level, base + GPIO_INT_LEVEL);
- __raw_writel(reg_both, base + GPIO_INT_BOTH_EDGE);
-
- gpio_ack_irq(d);
-
- return 0;
-}
-
-static void gpio_irq_handler(struct irq_desc *desc)
-{
- unsigned int port = (unsigned int)irq_desc_get_handler_data(desc);
- unsigned int gpio_irq_no, irq_stat;
-
- irq_stat = __raw_readl(GPIO_BASE(port) + GPIO_INT_STAT);
-
- gpio_irq_no = GPIO_IRQ_BASE + port * 32;
- for (; irq_stat != 0; irq_stat >>= 1, gpio_irq_no++) {
-
- if ((irq_stat & 1) == 0)
- continue;
-
- generic_handle_irq(gpio_irq_no);
- }
-}
-
-static struct irq_chip gpio_irq_chip = {
- .name = "GPIO",
- .irq_ack = gpio_ack_irq,
- .irq_mask = gpio_mask_irq,
- .irq_unmask = gpio_unmask_irq,
- .irq_set_type = gpio_set_irq_type,
-};
-
-static void _set_gpio_direction(struct gpio_chip *chip, unsigned offset,
- int dir)
-{
- void __iomem *base = GPIO_BASE(offset / 32);
- unsigned int reg;
-
- reg = __raw_readl(base + GPIO_DIR);
- if (dir)
- reg |= 1 << (offset % 32);
- else
- reg &= ~(1 << (offset % 32));
- __raw_writel(reg, base + GPIO_DIR);
-}
-
-static void gemini_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-{
- void __iomem *base = GPIO_BASE(offset / 32);
-
- if (value)
- __raw_writel(1 << (offset % 32), base + GPIO_DATA_SET);
- else
- __raw_writel(1 << (offset % 32), base + GPIO_DATA_CLR);
-}
-
-static int gemini_gpio_get(struct gpio_chip *chip, unsigned offset)
-{
- void __iomem *base = GPIO_BASE(offset / 32);
-
- return (__raw_readl(base + GPIO_DATA_IN) >> (offset % 32)) & 1;
-}
-
-static int gemini_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-{
- _set_gpio_direction(chip, offset, 0);
- return 0;
-}
-
-static int gemini_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
- int value)
-{
- _set_gpio_direction(chip, offset, 1);
- gemini_gpio_set(chip, offset, value);
- return 0;
-}
-
-static struct gpio_chip gemini_gpio_chip = {
- .label = "Gemini",
- .direction_input = gemini_gpio_direction_input,
- .get = gemini_gpio_get,
- .direction_output = gemini_gpio_direction_output,
- .set = gemini_gpio_set,
- .base = 0,
- .ngpio = GPIO_PORT_NUM * 32,
-};
-
-void __init gemini_gpio_init(void)
-{
- int i, j;
-
- for (i = 0; i < GPIO_PORT_NUM; i++) {
- /* disable, unmask and clear all interrupts */
- __raw_writel(0x0, GPIO_BASE(i) + GPIO_INT_EN);
- __raw_writel(0x0, GPIO_BASE(i) + GPIO_INT_MASK);
- __raw_writel(~0x0, GPIO_BASE(i) + GPIO_INT_CLR);
-
- for (j = GPIO_IRQ_BASE + i * 32;
- j < GPIO_IRQ_BASE + (i + 1) * 32; j++) {
- irq_set_chip_and_handler(j, &gpio_irq_chip,
- handle_edge_irq);
- irq_clear_status_flags(j, IRQ_NOREQUEST);
- }
-
- irq_set_chained_handler_and_data(IRQ_GPIO(i), gpio_irq_handler,
- (void *)i);
- }
-
- BUG_ON(gpiochip_add_data(&gemini_gpio_chip, NULL));
-}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-14 20:56:01 +0300