[ARM] pxa: move GPIO IRQ specific code out of irq.c into gpio.c

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

3 files changed, 185 insertions, 183 deletions

diff --git a/arch/arm/mach-pxa/generic.h b/arch/arm/mach-pxa/generic.h
index b3d10b0e52a..cbe6693b1b6 100644
--- a/arch/arm/mach-pxa/generic.h
+++ b/arch/arm/mach-pxa/generic.h
@@ -16,6 +16,7 @@ extern void __init pxa_init_irq_low(void);
 extern void __init pxa_init_irq_high(void);
 extern void __init pxa_init_irq_gpio(int gpio_nr);
 extern void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int));
+extern void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int));
 extern void __init pxa_init_gpio(int gpio_nr);
 extern void __init pxa25x_init_irq(void);
 extern void __init pxa27x_init_irq(void);
diff --git a/arch/arm/mach-pxa/gpio.c b/arch/arm/mach-pxa/gpio.c
index 37b5b83fe24..a6422725415 100644
--- a/arch/arm/mach-pxa/gpio.c
+++ b/arch/arm/mach-pxa/gpio.c
@@ -14,6 +14,7 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/irq.h>
 
 #include <asm/gpio.h>
 #include <asm/hardware.h>
@@ -165,3 +166,185 @@ void __init pxa_init_gpio(int gpio_nr)
 		gpiochip_add(&pxa_gpio_chip[i/32].chip);
 	}
 }
+
+/*
+ * PXA GPIO edge detection for IRQs:
+ * IRQs are generated on Falling-Edge, Rising-Edge, or both.
+ * Use this instead of directly setting GRER/GFER.
+ */
+
+static long GPIO_IRQ_rising_edge[4];
+static long GPIO_IRQ_falling_edge[4];
+static long GPIO_IRQ_mask[4];
+
+static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
+{
+	int gpio, idx;
+
+	gpio = IRQ_TO_GPIO(irq);
+	idx = gpio >> 5;
+
+	if (type == IRQ_TYPE_PROBE) {
+		/* Don't mess with enabled GPIOs using preconfigured edges or
+		 * GPIOs set to alternate function or to output during probe
+		 */
+		if ((GPIO_IRQ_rising_edge[idx] |
+		     GPIO_IRQ_falling_edge[idx] |
+		     GPDR(gpio)) & GPIO_bit(gpio))
+			return 0;
+		if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
+			return 0;
+		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+	}
+
+	pxa_gpio_mode(gpio | GPIO_IN);
+
+	if (type & IRQ_TYPE_EDGE_RISING)
+		__set_bit(gpio, GPIO_IRQ_rising_edge);
+	else
+		__clear_bit(gpio, GPIO_IRQ_rising_edge);
+
+	if (type & IRQ_TYPE_EDGE_FALLING)
+		__set_bit(gpio, GPIO_IRQ_falling_edge);
+	else
+		__clear_bit(gpio, GPIO_IRQ_falling_edge);
+
+	GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
+	GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
+
+	pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
+		((type & IRQ_TYPE_EDGE_RISING)  ? " rising"  : ""),
+		((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
+	return 0;
+}
+
+/*
+ * GPIO IRQs must be acknowledged.  This is for GPIO 0 and 1.
+ */
+
+static void pxa_ack_low_gpio(unsigned int irq)
+{
+	GEDR0 = (1 << (irq - IRQ_GPIO0));
+}
+
+static void pxa_mask_low_gpio(unsigned int irq)
+{
+	ICMR &= ~(1 << (irq - PXA_IRQ(0)));
+}
+
+static void pxa_unmask_low_gpio(unsigned int irq)
+{
+	ICMR |= 1 << (irq - PXA_IRQ(0));
+}
+
+static struct irq_chip pxa_low_gpio_chip = {
+	.name		= "GPIO-l",
+	.ack		= pxa_ack_low_gpio,
+	.mask		= pxa_mask_low_gpio,
+	.unmask		= pxa_unmask_low_gpio,
+	.set_type	= pxa_gpio_irq_type,
+};
+
+/*
+ * Demux handler for GPIO>=2 edge detect interrupts
+ */
+
+#define GEDR_BITS	(sizeof(gedr) * BITS_PER_BYTE)
+
+static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
+{
+	int loop, bit, n;
+	unsigned long gedr[4];
+
+	do {
+		gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3;
+		gedr[1] = GEDR1 & GPIO_IRQ_mask[1];
+		gedr[2] = GEDR2 & GPIO_IRQ_mask[2];
+		gedr[3] = GEDR3 & GPIO_IRQ_mask[3];
+
+		GEDR0 = gedr[0]; GEDR1 = gedr[1];
+		GEDR2 = gedr[2]; GEDR3 = gedr[3];
+
+		loop = 0;
+		bit = find_first_bit(gedr, GEDR_BITS);
+		while (bit < GEDR_BITS) {
+			loop = 1;
+
+			n = PXA_GPIO_IRQ_BASE + bit;
+			desc_handle_irq(n, irq_desc + n);
+
+			bit = find_next_bit(gedr, GEDR_BITS, bit + 1);
+		}
+	} while (loop);
+}
+
+static void pxa_ack_muxed_gpio(unsigned int irq)
+{
+	int gpio = irq - IRQ_GPIO(2) + 2;
+	GEDR(gpio) = GPIO_bit(gpio);
+}
+
+static void pxa_mask_muxed_gpio(unsigned int irq)
+{
+	int gpio = irq - IRQ_GPIO(2) + 2;
+	__clear_bit(gpio, GPIO_IRQ_mask);
+	GRER(gpio) &= ~GPIO_bit(gpio);
+	GFER(gpio) &= ~GPIO_bit(gpio);
+}
+
+static void pxa_unmask_muxed_gpio(unsigned int irq)
+{
+	int gpio = irq - IRQ_GPIO(2) + 2;
+	int idx = gpio >> 5;
+	__set_bit(gpio, GPIO_IRQ_mask);
+	GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
+	GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
+}
+
+static struct irq_chip pxa_muxed_gpio_chip = {
+	.name		= "GPIO",
+	.ack		= pxa_ack_muxed_gpio,
+	.mask		= pxa_mask_muxed_gpio,
+	.unmask		= pxa_unmask_muxed_gpio,
+	.set_type	= pxa_gpio_irq_type,
+};
+
+void __init pxa_init_irq_gpio(int gpio_nr)
+{
+	int irq, i;
+
+	pxa_last_gpio = gpio_nr - 1;
+
+	/* clear all GPIO edge detects */
+	for (i = 0; i < gpio_nr; i += 32) {
+		GFER(i) = 0;
+		GRER(i) = 0;
+		GEDR(i) = GEDR(i);
+	}
+
+	/* GPIO 0 and 1 must have their mask bit always set */
+	GPIO_IRQ_mask[0] = 3;
+
+	for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
+		set_irq_chip(irq, &pxa_low_gpio_chip);
+		set_irq_handler(irq, handle_edge_irq);
+		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+	}
+
+	for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
+		set_irq_chip(irq, &pxa_muxed_gpio_chip);
+		set_irq_handler(irq, handle_edge_irq);
+		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+	}
+
+	/* Install handler for GPIO>=2 edge detect interrupts */
+	set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
+
+	pxa_init_gpio(gpio_nr);
+}
+
+void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int))
+{
+	pxa_low_gpio_chip.set_wake = set_wake;
+	pxa_muxed_gpio_chip.set_wake = set_wake;
+}
diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 4fd4560dd3a..da3a44a4249 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -1,7 +1,7 @@
 /*
  *  linux/arch/arm/mach-pxa/irq.c
  *
- *  Generic PXA IRQ handling, GPIO IRQ demultiplexing, etc.
+ *  Generic PXA IRQ handling
  *
  *  Author:	Nicolas Pitre
  *  Created:	Jun 15, 2001
@@ -104,188 +104,6 @@ void __init pxa_init_irq_high(void)
 }
 #endif
 
-/*
- * PXA GPIO edge detection for IRQs:
- * IRQs are generated on Falling-Edge, Rising-Edge, or both.
- * Use this instead of directly setting GRER/GFER.
- */
-
-static long GPIO_IRQ_rising_edge[4];
-static long GPIO_IRQ_falling_edge[4];
-static long GPIO_IRQ_mask[4];
-
-static int pxa_gpio_irq_type(unsigned int irq, unsigned int type)
-{
-	int gpio, idx;
-
-	gpio = IRQ_TO_GPIO(irq);
-	idx = gpio >> 5;
-
-	if (type == IRQ_TYPE_PROBE) {
-		/* Don't mess with enabled GPIOs using preconfigured edges or
-		 * GPIOs set to alternate function or to output during probe
-		 */
-		if ((GPIO_IRQ_rising_edge[idx] |
-		     GPIO_IRQ_falling_edge[idx] |
-		     GPDR(gpio)) & GPIO_bit(gpio))
-			return 0;
-		if (GAFR(gpio) & (0x3 << (((gpio) & 0xf)*2)))
-			return 0;
-		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-	}
-
-	pxa_gpio_mode(gpio | GPIO_IN);
-
-	if (type & IRQ_TYPE_EDGE_RISING)
-		__set_bit(gpio, GPIO_IRQ_rising_edge);
-	else
-		__clear_bit(gpio, GPIO_IRQ_rising_edge);
-
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		__set_bit(gpio, GPIO_IRQ_falling_edge);
-	else
-		__clear_bit(gpio, GPIO_IRQ_falling_edge);
-
-	GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
-	GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
-
-	pr_debug("%s: IRQ%d (GPIO%d) - edge%s%s\n", __func__, irq, gpio,
-		((type & IRQ_TYPE_EDGE_RISING)  ? " rising"  : ""),
-		((type & IRQ_TYPE_EDGE_FALLING) ? " falling" : ""));
-	return 0;
-}
-
-/*
- * GPIO IRQs must be acknowledged.  This is for GPIO 0 and 1.
- */
-
-static void pxa_ack_low_gpio(unsigned int irq)
-{
-	GEDR0 = (1 << (irq - IRQ_GPIO0));
-}
-
-static void pxa_mask_low_gpio(unsigned int irq)
-{
-	ICMR &= ~(1 << (irq - PXA_IRQ(0)));
-}
-
-static void pxa_unmask_low_gpio(unsigned int irq)
-{
-	ICMR |= 1 << (irq - PXA_IRQ(0));
-}
-
-static struct irq_chip pxa_low_gpio_chip = {
-	.name		= "GPIO-l",
-	.ack		= pxa_ack_low_gpio,
-	.mask		= pxa_mask_low_gpio,
-	.unmask		= pxa_unmask_low_gpio,
-	.set_type	= pxa_gpio_irq_type,
-};
-
-/*
- * Demux handler for GPIO>=2 edge detect interrupts
- */
-
-#define GEDR_BITS	(sizeof(gedr) * BITS_PER_BYTE)
-
-static void pxa_gpio_demux_handler(unsigned int irq, struct irq_desc *desc)
-{
-	int loop, bit, n;
-	unsigned long gedr[4];
-
-	do {
-		gedr[0] = GEDR0 & GPIO_IRQ_mask[0] & ~3;
-		gedr[1] = GEDR1 & GPIO_IRQ_mask[1];
-		gedr[2] = GEDR2 & GPIO_IRQ_mask[2];
-		gedr[3] = GEDR3 & GPIO_IRQ_mask[3];
-
-		GEDR0 = gedr[0]; GEDR1 = gedr[1];
-		GEDR2 = gedr[2]; GEDR3 = gedr[3];
-
-		loop = 0;
-		bit = find_first_bit(gedr, GEDR_BITS);
-		while (bit < GEDR_BITS) {
-			loop = 1;
-
-			n = PXA_GPIO_IRQ_BASE + bit;
-			desc_handle_irq(n, irq_desc + n);
-
-			bit = find_next_bit(gedr, GEDR_BITS, bit + 1);
-		}
-	} while (loop);
-}
-
-static void pxa_ack_muxed_gpio(unsigned int irq)
-{
-	int gpio = irq - IRQ_GPIO(2) + 2;
-	GEDR(gpio) = GPIO_bit(gpio);
-}
-
-static void pxa_mask_muxed_gpio(unsigned int irq)
-{
-	int gpio = irq - IRQ_GPIO(2) + 2;
-	__clear_bit(gpio, GPIO_IRQ_mask);
-	GRER(gpio) &= ~GPIO_bit(gpio);
-	GFER(gpio) &= ~GPIO_bit(gpio);
-}
-
-static void pxa_unmask_muxed_gpio(unsigned int irq)
-{
-	int gpio = irq - IRQ_GPIO(2) + 2;
-	int idx = gpio >> 5;
-	__set_bit(gpio, GPIO_IRQ_mask);
-	GRER(gpio) = GPIO_IRQ_rising_edge[idx] & GPIO_IRQ_mask[idx];
-	GFER(gpio) = GPIO_IRQ_falling_edge[idx] & GPIO_IRQ_mask[idx];
-}
-
-static struct irq_chip pxa_muxed_gpio_chip = {
-	.name		= "GPIO",
-	.ack		= pxa_ack_muxed_gpio,
-	.mask		= pxa_mask_muxed_gpio,
-	.unmask		= pxa_unmask_muxed_gpio,
-	.set_type	= pxa_gpio_irq_type,
-};
-
-void __init pxa_init_irq_gpio(int gpio_nr)
-{
-	int irq, i;
-
-	pxa_last_gpio = gpio_nr - 1;
-
-	/* clear all GPIO edge detects */
-	for (i = 0; i < gpio_nr; i += 32) {
-		GFER(i) = 0;
-		GRER(i) = 0;
-		GEDR(i) = GEDR(i);
-	}
-
-	/* GPIO 0 and 1 must have their mask bit always set */
-	GPIO_IRQ_mask[0] = 3;
-
-	for (irq = IRQ_GPIO0; irq <= IRQ_GPIO1; irq++) {
-		set_irq_chip(irq, &pxa_low_gpio_chip);
-		set_irq_handler(irq, handle_edge_irq);
-		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-	}
-
-	for (irq = IRQ_GPIO(2); irq < IRQ_GPIO(gpio_nr); irq++) {
-		set_irq_chip(irq, &pxa_muxed_gpio_chip);
-		set_irq_handler(irq, handle_edge_irq);
-		set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
-	}
-
-	/* Install handler for GPIO>=2 edge detect interrupts */
-	set_irq_chained_handler(IRQ_GPIO_2_x, pxa_gpio_demux_handler);
-
-	pxa_init_gpio(gpio_nr);
-}
-
-void __init pxa_init_gpio_set_wake(int (*set_wake)(unsigned int, unsigned int))
-{
-	pxa_low_gpio_chip.set_wake = set_wake;
-	pxa_muxed_gpio_chip.set_wake = set_wake;
-}
-
 void __init pxa_init_irq_set_wake(int (*set_wake)(unsigned int, unsigned int))
 {
 	pxa_internal_chip_low.set_wake = set_wake;