summaryrefslogtreecommitdiff
path: root/arch/arm/mach-orion5x/gpio.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/arm/mach-orion5x/gpio.c')
-rw-r--r--arch/arm/mach-orion5x/gpio.c231
1 files changed, 0 insertions, 231 deletions
diff --git a/arch/arm/mach-orion5x/gpio.c b/arch/arm/mach-orion5x/gpio.c
deleted file mode 100644
index f99d08811e5a..000000000000
--- a/arch/arm/mach-orion5x/gpio.c
+++ /dev/null
@@ -1,231 +0,0 @@
-/*
- * arch/arm/mach-orion5x/gpio.c
- *
- * GPIO functions for Marvell Orion System On Chip
- *
- * Maintainer: Tzachi Perelstein <tzachi@marvell.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/spinlock.h>
-#include <linux/bitops.h>
-#include <linux/io.h>
-#include <asm/gpio.h>
-#include <mach/orion5x.h>
-#include "common.h"
-
-static DEFINE_SPINLOCK(gpio_lock);
-static unsigned long gpio_valid[BITS_TO_LONGS(GPIO_MAX)];
-static const char *gpio_label[GPIO_MAX]; /* non null for allocated GPIOs */
-
-void __init orion5x_gpio_set_valid(unsigned pin, int valid)
-{
- if (valid)
- __set_bit(pin, gpio_valid);
- else
- __clear_bit(pin, gpio_valid);
-}
-
-/*
- * GENERIC_GPIO primitives
- */
-int gpio_direction_input(unsigned pin)
-{
- unsigned long flags;
-
- if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
- pr_debug("%s: invalid GPIO %d\n", __func__, pin);
- return -EINVAL;
- }
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- /*
- * Some callers might have not used the gpio_request(),
- * so flag this pin as requested now.
- */
- if (!gpio_label[pin])
- gpio_label[pin] = "?";
-
- orion5x_setbits(GPIO_IO_CONF, 1 << pin);
-
- spin_unlock_irqrestore(&gpio_lock, flags);
- return 0;
-}
-EXPORT_SYMBOL(gpio_direction_input);
-
-int gpio_direction_output(unsigned pin, int value)
-{
- unsigned long flags;
- int mask;
-
- if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
- pr_debug("%s: invalid GPIO %d\n", __func__, pin);
- return -EINVAL;
- }
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- /*
- * Some callers might have not used the gpio_request(),
- * so flag this pin as requested now.
- */
- if (!gpio_label[pin])
- gpio_label[pin] = "?";
-
- mask = 1 << pin;
- orion5x_clrbits(GPIO_BLINK_EN, mask);
- if (value)
- orion5x_setbits(GPIO_OUT, mask);
- else
- orion5x_clrbits(GPIO_OUT, mask);
- orion5x_clrbits(GPIO_IO_CONF, mask);
-
- spin_unlock_irqrestore(&gpio_lock, flags);
- return 0;
-}
-EXPORT_SYMBOL(gpio_direction_output);
-
-int gpio_get_value(unsigned pin)
-{
- int val, mask = 1 << pin;
-
- if (readl(GPIO_IO_CONF) & mask)
- val = readl(GPIO_DATA_IN) ^ readl(GPIO_IN_POL);
- else
- val = readl(GPIO_OUT);
-
- return val & mask;
-}
-EXPORT_SYMBOL(gpio_get_value);
-
-void gpio_set_value(unsigned pin, int value)
-{
- unsigned long flags;
- int mask = 1 << pin;
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- orion5x_clrbits(GPIO_BLINK_EN, mask);
- if (value)
- orion5x_setbits(GPIO_OUT, mask);
- else
- orion5x_clrbits(GPIO_OUT, mask);
-
- spin_unlock_irqrestore(&gpio_lock, flags);
-}
-EXPORT_SYMBOL(gpio_set_value);
-
-void orion5x_gpio_set_blink(unsigned pin, int blink)
-{
- unsigned long flags;
- int mask = 1 << pin;
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- orion5x_clrbits(GPIO_OUT, mask);
- if (blink)
- orion5x_setbits(GPIO_BLINK_EN, mask);
- else
- orion5x_clrbits(GPIO_BLINK_EN, mask);
-
- spin_unlock_irqrestore(&gpio_lock, flags);
-}
-EXPORT_SYMBOL(orion5x_gpio_set_blink);
-
-int gpio_request(unsigned pin, const char *label)
-{
- int ret = 0;
- unsigned long flags;
-
- if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
- pr_debug("%s: invalid GPIO %d\n", __func__, pin);
- return -EINVAL;
- }
-
- spin_lock_irqsave(&gpio_lock, flags);
-
- if (gpio_label[pin]) {
- pr_debug("%s: GPIO %d already used as %s\n",
- __func__, pin, gpio_label[pin]);
- ret = -EBUSY;
- } else
- gpio_label[pin] = label ? label : "?";
-
- spin_unlock_irqrestore(&gpio_lock, flags);
- return ret;
-}
-EXPORT_SYMBOL(gpio_request);
-
-void gpio_free(unsigned pin)
-{
- might_sleep();
-
- if (pin >= GPIO_MAX || !test_bit(pin, gpio_valid)) {
- pr_debug("%s: invalid GPIO %d\n", __func__, pin);
- return;
- }
-
- if (!gpio_label[pin])
- pr_warning("%s: GPIO %d already freed\n", __func__, pin);
- else
- gpio_label[pin] = NULL;
-}
-EXPORT_SYMBOL(gpio_free);
-
-/* Debug helper */
-void gpio_display(void)
-{
- int i;
-
- for (i = 0; i < GPIO_MAX; i++) {
- printk(KERN_DEBUG "Pin-%d: ", i);
-
- if (!test_bit(i, gpio_valid)) {
- printk("non-GPIO\n");
- } else if (!gpio_label[i]) {
- printk("GPIO, free\n");
- } else {
- printk("GPIO, used by %s, ", gpio_label[i]);
- if (readl(GPIO_IO_CONF) & (1 << i)) {
- printk("input, active %s, level %s, edge %s\n",
- ((readl(GPIO_IN_POL) >> i) & 1) ? "low" : "high",
- ((readl(GPIO_LEVEL_MASK) >> i) & 1) ? "enabled" : "masked",
- ((readl(GPIO_EDGE_MASK) >> i) & 1) ? "enabled" : "masked");
- } else {
- printk("output, val=%d\n", (readl(GPIO_OUT) >> i) & 1);
- }
- }
- }
-
- printk(KERN_DEBUG "MPP_0_7_CTRL (0x%08x) = 0x%08x\n",
- MPP_0_7_CTRL, readl(MPP_0_7_CTRL));
- printk(KERN_DEBUG "MPP_8_15_CTRL (0x%08x) = 0x%08x\n",
- MPP_8_15_CTRL, readl(MPP_8_15_CTRL));
- printk(KERN_DEBUG "MPP_16_19_CTRL (0x%08x) = 0x%08x\n",
- MPP_16_19_CTRL, readl(MPP_16_19_CTRL));
- printk(KERN_DEBUG "MPP_DEV_CTRL (0x%08x) = 0x%08x\n",
- MPP_DEV_CTRL, readl(MPP_DEV_CTRL));
- printk(KERN_DEBUG "GPIO_OUT (0x%08x) = 0x%08x\n",
- GPIO_OUT, readl(GPIO_OUT));
- printk(KERN_DEBUG "GPIO_IO_CONF (0x%08x) = 0x%08x\n",
- GPIO_IO_CONF, readl(GPIO_IO_CONF));
- printk(KERN_DEBUG "GPIO_BLINK_EN (0x%08x) = 0x%08x\n",
- GPIO_BLINK_EN, readl(GPIO_BLINK_EN));
- printk(KERN_DEBUG "GPIO_IN_POL (0x%08x) = 0x%08x\n",
- GPIO_IN_POL, readl(GPIO_IN_POL));
- printk(KERN_DEBUG "GPIO_DATA_IN (0x%08x) = 0x%08x\n",
- GPIO_DATA_IN, readl(GPIO_DATA_IN));
- printk(KERN_DEBUG "GPIO_LEVEL_MASK (0x%08x) = 0x%08x\n",
- GPIO_LEVEL_MASK, readl(GPIO_LEVEL_MASK));
- printk(KERN_DEBUG "GPIO_EDGE_CAUSE (0x%08x) = 0x%08x\n",
- GPIO_EDGE_CAUSE, readl(GPIO_EDGE_CAUSE));
- printk(KERN_DEBUG "GPIO_EDGE_MASK (0x%08x) = 0x%08x\n",
- GPIO_EDGE_MASK, readl(GPIO_EDGE_MASK));
-}
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-11 18:12:53 +0300