mirror of https://github.com/hak5/openwrt.git
116 lines
3.9 KiB
Diff
116 lines
3.9 KiB
Diff
From c334aa8da6e17555823ebf05bdb429ff224e99b3 Mon Sep 17 00:00:00 2001
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From: popcornmix <popcornmix@gmail.com>
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Date: Thu, 9 Jan 2014 16:05:20 +0000
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Subject: [PATCH 154/174] gpio: support low and high level interrupts
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---
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arch/arm/mach-bcm2708/bcm2708_gpio.c | 52 +++++++++++++++++++++++++-----------
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1 file changed, 37 insertions(+), 15 deletions(-)
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--- a/arch/arm/mach-bcm2708/bcm2708_gpio.c
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+++ b/arch/arm/mach-bcm2708/bcm2708_gpio.c
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@@ -58,6 +58,8 @@ struct bcm2708_gpio {
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struct gpio_chip gc;
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unsigned long rising;
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unsigned long falling;
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+ unsigned long high;
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+ unsigned long low;
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};
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static int bcm2708_set_function(struct gpio_chip *gc, unsigned offset,
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@@ -145,20 +147,22 @@ static int bcm2708_gpio_irq_set_type(str
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unsigned irq = d->irq;
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struct bcm2708_gpio *gpio = irq_get_chip_data(irq);
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- if (type & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
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+ gpio->rising &= ~(1 << __bcm2708_irq_to_gpio(irq));
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+ gpio->falling &= ~(1 << __bcm2708_irq_to_gpio(irq));
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+ gpio->high &= ~(1 << __bcm2708_irq_to_gpio(irq));
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+ gpio->low &= ~(1 << __bcm2708_irq_to_gpio(irq));
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+
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+ if (type & ~(IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING | IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
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return -EINVAL;
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- if (type & IRQ_TYPE_EDGE_RISING) {
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+ if (type & IRQ_TYPE_EDGE_RISING)
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gpio->rising |= (1 << __bcm2708_irq_to_gpio(irq));
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- } else {
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- gpio->rising &= ~(1 << __bcm2708_irq_to_gpio(irq));
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- }
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-
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- if (type & IRQ_TYPE_EDGE_FALLING) {
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+ if (type & IRQ_TYPE_EDGE_FALLING)
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gpio->falling |= (1 << __bcm2708_irq_to_gpio(irq));
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- } else {
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- gpio->falling &= ~(1 << __bcm2708_irq_to_gpio(irq));
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- }
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+ if (type & IRQ_TYPE_LEVEL_HIGH)
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+ gpio->high |= (1 << __bcm2708_irq_to_gpio(irq));
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+ if (type & IRQ_TYPE_LEVEL_LOW)
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+ gpio->low |= (1 << __bcm2708_irq_to_gpio(irq));
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return 0;
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}
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@@ -168,13 +172,17 @@ static void bcm2708_gpio_irq_mask(struct
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struct bcm2708_gpio *gpio = irq_get_chip_data(irq);
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unsigned gn = __bcm2708_irq_to_gpio(irq);
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unsigned gb = gn / 32;
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- unsigned long rising = readl(gpio->base + GPIOREN(gb));
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+ unsigned long rising = readl(gpio->base + GPIOREN(gb));
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unsigned long falling = readl(gpio->base + GPIOFEN(gb));
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+ unsigned long high = readl(gpio->base + GPIOHEN(gb));
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+ unsigned long low = readl(gpio->base + GPIOLEN(gb));
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gn = gn % 32;
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- writel(rising & ~(1 << gn), gpio->base + GPIOREN(gb));
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+ writel(rising & ~(1 << gn), gpio->base + GPIOREN(gb));
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writel(falling & ~(1 << gn), gpio->base + GPIOFEN(gb));
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+ writel(high & ~(1 << gn), gpio->base + GPIOHEN(gb));
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+ writel(low & ~(1 << gn), gpio->base + GPIOLEN(gb));
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}
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static void bcm2708_gpio_irq_unmask(struct irq_data *d)
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@@ -183,24 +191,38 @@ static void bcm2708_gpio_irq_unmask(stru
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struct bcm2708_gpio *gpio = irq_get_chip_data(irq);
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unsigned gn = __bcm2708_irq_to_gpio(irq);
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unsigned gb = gn / 32;
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- unsigned long rising = readl(gpio->base + GPIOREN(gb));
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+ unsigned long rising = readl(gpio->base + GPIOREN(gb));
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unsigned long falling = readl(gpio->base + GPIOFEN(gb));
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+ unsigned long high = readl(gpio->base + GPIOHEN(gb));
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+ unsigned long low = readl(gpio->base + GPIOLEN(gb));
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gn = gn % 32;
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writel(1 << gn, gpio->base + GPIOEDS(gb));
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if (gpio->rising & (1 << gn)) {
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- writel(rising | (1 << gn), gpio->base + GPIOREN(gb));
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+ writel(rising | (1 << gn), gpio->base + GPIOREN(gb));
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} else {
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writel(rising & ~(1 << gn), gpio->base + GPIOREN(gb));
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}
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if (gpio->falling & (1 << gn)) {
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- writel(falling | (1 << gn), gpio->base + GPIOFEN(gb));
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+ writel(falling | (1 << gn), gpio->base + GPIOFEN(gb));
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} else {
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writel(falling & ~(1 << gn), gpio->base + GPIOFEN(gb));
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}
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+
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+ if (gpio->high & (1 << gn)) {
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+ writel(high | (1 << gn), gpio->base + GPIOHEN(gb));
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+ } else {
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+ writel(high & ~(1 << gn), gpio->base + GPIOHEN(gb));
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+ }
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+
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+ if (gpio->low & (1 << gn)) {
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+ writel(low | (1 << gn), gpio->base + GPIOLEN(gb));
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+ } else {
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+ writel(low & ~(1 << gn), gpio->base + GPIOLEN(gb));
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+ }
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}
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static struct irq_chip bcm2708_irqchip = {
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