1 files changed, 195 insertions, 115 deletions

diff --git a/arch/arm/mach-pxa/irq.c b/arch/arm/mach-pxa/irq.c
index 1beb40f692f..0eecd83c624 100644
--- a/arch/arm/mach-pxa/irq.c
+++ b/arch/arm/mach-pxa/irq.c
@@ -11,199 +11,279 @@
  *  it under the terms of the GNU General Public License version 2 as
  *  published by the Free Software Foundation.
  */
-
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/interrupt.h>
-#include <linux/sysdev.h>
+#include <linux/syscore_ops.h>
+#include <linux/io.h>
+#include <linux/irq.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+
+#include <asm/exception.h>
 
 #include <mach/hardware.h>
-#include <asm/irq.h>
-#include <asm/mach/irq.h>
-#include <mach/gpio.h>
-#include <mach/regs-intc.h>
+#include <mach/irqs.h>
 
 #include "generic.h"
 
-#define MAX_INTERNAL_IRQS	128
+#define ICIP			(0x000)
+#define ICMR			(0x004)
+#define ICLR			(0x008)
+#define ICFR			(0x00c)
+#define ICPR			(0x010)
+#define ICCR			(0x014)
+#define ICHP			(0x018)
+#define IPR(i)			(((i) < 32) ? (0x01c + ((i) << 2)) :		\
+				((i) < 64) ? (0x0b0 + (((i) - 32) << 2)) :	\
+				      (0x144 + (((i) - 64) << 2)))
+#define ICHP_VAL_IRQ		(1 << 31)
+#define ICHP_IRQ(i)		(((i) >> 16) & 0x7fff)
+#define IPR_VALID		(1 << 31)
+#define IRQ_BIT(n)		(((n) - PXA_IRQ(0)) & 0x1f)
 
-#define IRQ_BIT(n)	(((n) - PXA_IRQ(0)) & 0x1f)
-#define _ICMR(n)	(*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICMR2 : &ICMR))
-#define _ICLR(n)	(*((((n) - PXA_IRQ(0)) & ~0x1f) ? &ICLR2 : &ICLR))
+#define MAX_INTERNAL_IRQS	128
 
 /*
  * This is for peripheral IRQs internal to the PXA chip.
  */
 
+static void __iomem *pxa_irq_base;
 static int pxa_internal_irq_nr;
+static bool cpu_has_ipr;
 
-static void pxa_mask_irq(unsigned int irq)
+static inline void __iomem *irq_base(int i)
 {
-	_ICMR(irq) &= ~(1 << IRQ_BIT(irq));
+	static unsigned long phys_base_offset[] = {
+		0x0,
+		0x9c,
+		0x130,
+	};
+
+	return pxa_irq_base + phys_base_offset[i];
 }
 
-static void pxa_unmask_irq(unsigned int irq)
+void pxa_mask_irq(struct irq_data *d)
 {
-	_ICMR(irq) |= 1 << IRQ_BIT(irq);
+	void __iomem *base = irq_data_get_irq_chip_data(d);
+	uint32_t icmr = __raw_readl(base + ICMR);
+
+	icmr &= ~(1 << IRQ_BIT(d->irq));
+	__raw_writel(icmr, base + ICMR);
+}
+
+void pxa_unmask_irq(struct irq_data *d)
+{
+	void __iomem *base = irq_data_get_irq_chip_data(d);
+	uint32_t icmr = __raw_readl(base + ICMR);
+
+	icmr |= 1 << IRQ_BIT(d->irq);
+	__raw_writel(icmr, base + ICMR);
 }
 
 static struct irq_chip pxa_internal_irq_chip = {
 	.name		= "SC",
-	.ack		= pxa_mask_irq,
-	.mask		= pxa_mask_irq,
-	.unmask		= pxa_unmask_irq,
+	.irq_ack	= pxa_mask_irq,
+	.irq_mask	= pxa_mask_irq,
+	.irq_unmask	= pxa_unmask_irq,
 };
 
-/*
- * GPIO IRQs for GPIO 0 and 1
- */
-static int pxa_set_low_gpio_type(unsigned int irq, unsigned int type)
+asmlinkage void __exception_irq_entry icip_handle_irq(struct pt_regs *regs)
 {
-	int gpio = irq - IRQ_GPIO0;
-
-	if (__gpio_is_occupied(gpio)) {
-		pr_err("%s failed: GPIO is configured\n", __func__);
-		return -EINVAL;
-	}
-
-	if (type & IRQ_TYPE_EDGE_RISING)
-		GRER0 |= GPIO_bit(gpio);
-	else
-		GRER0 &= ~GPIO_bit(gpio);
-
-	if (type & IRQ_TYPE_EDGE_FALLING)
-		GFER0 |= GPIO_bit(gpio);
-	else
-		GFER0 &= ~GPIO_bit(gpio);
-
-	return 0;
-}
+	uint32_t icip, icmr, mask;
 
-static void pxa_ack_low_gpio(unsigned int irq)
-{
-	GEDR0 = (1 << (irq - IRQ_GPIO0));
-}
+	do {
+		icip = __raw_readl(pxa_irq_base + ICIP);
+		icmr = __raw_readl(pxa_irq_base + ICMR);
+		mask = icip & icmr;
 
-static void pxa_mask_low_gpio(unsigned int irq)
-{
-	ICMR &= ~(1 << (irq - PXA_IRQ(0)));
-}
+		if (mask == 0)
+			break;
 
-static void pxa_unmask_low_gpio(unsigned int irq)
-{
-	ICMR |= 1 << (irq - PXA_IRQ(0));
+		handle_IRQ(PXA_IRQ(fls(mask) - 1), regs);
+	} while (1);
 }
 
-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_set_low_gpio_type,
-};
-
-static void __init pxa_init_low_gpio_irq(set_wake_t fn)
+asmlinkage void __exception_irq_entry ichp_handle_irq(struct pt_regs *regs)
 {
-	int irq;
+	uint32_t ichp;
 
-	/* clear edge detection on GPIO 0 and 1 */
-	GFER0 &= ~0x3;
-	GRER0 &= ~0x3;
-	GEDR0 = 0x3;
+	do {
+		__asm__ __volatile__("mrc p6, 0, %0, c5, c0, 0\n": "=r"(ichp));
 
-	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);
-	}
+		if ((ichp & ICHP_VAL_IRQ) == 0)
+			break;
 
-	pxa_low_gpio_chip.set_wake = fn;
+		handle_IRQ(PXA_IRQ(ICHP_IRQ(ichp)), regs);
+	} while (1);
 }
 
-void __init pxa_init_irq(int irq_nr, set_wake_t fn)
+void __init pxa_init_irq(int irq_nr, int (*fn)(struct irq_data *, unsigned int))
 {
-	int irq, i;
+	int irq, i, n;
 
 	BUG_ON(irq_nr > MAX_INTERNAL_IRQS);
 
 	pxa_internal_irq_nr = irq_nr;
-
-	for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq += 32) {
-		_ICMR(irq) = 0;	/* disable all IRQs */
-		_ICLR(irq) = 0;	/* all IRQs are IRQ, not FIQ */
-	}
-
-	/* initialize interrupt priority */
-	if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
-		for (i = 0; i < irq_nr; i++)
-			IPR(i) = i | (1 << 31);
+	cpu_has_ipr = !cpu_is_pxa25x();
+	pxa_irq_base = io_p2v(0x40d00000);
+
+	for (n = 0; n < irq_nr; n += 32) {
+		void __iomem *base = irq_base(n >> 5);
+
+		__raw_writel(0, base + ICMR);	/* disable all IRQs */
+		__raw_writel(0, base + ICLR);	/* all IRQs are IRQ, not FIQ */
+		for (i = n; (i < (n + 32)) && (i < irq_nr); i++) {
+			/* initialize interrupt priority */
+			if (cpu_has_ipr)
+				__raw_writel(i | IPR_VALID, pxa_irq_base + IPR(i));
+
+			irq = PXA_IRQ(i);
+			irq_set_chip_and_handler(irq, &pxa_internal_irq_chip,
+						 handle_level_irq);
+			irq_set_chip_data(irq, base);
+			set_irq_flags(irq, IRQF_VALID);
+		}
 	}
 
 	/* only unmasked interrupts kick us out of idle */
-	ICCR = 1;
-
-	for (irq = PXA_IRQ(0); irq < PXA_IRQ(irq_nr); irq++) {
-		set_irq_chip(irq, &pxa_internal_irq_chip);
-		set_irq_handler(irq, handle_level_irq);
-		set_irq_flags(irq, IRQF_VALID);
-	}
+	__raw_writel(1, irq_base(0) + ICCR);
 
-	pxa_internal_irq_chip.set_wake = fn;
-	pxa_init_low_gpio_irq(fn);
+	pxa_internal_irq_chip.irq_set_wake = fn;
 }
 
 #ifdef CONFIG_PM
 static unsigned long saved_icmr[MAX_INTERNAL_IRQS/32];
 static unsigned long saved_ipr[MAX_INTERNAL_IRQS];
 
-static int pxa_irq_suspend(struct sys_device *dev, pm_message_t state)
+static int pxa_irq_suspend(void)
 {
-	int i, irq = PXA_IRQ(0);
+	int i;
+
+	for (i = 0; i < pxa_internal_irq_nr / 32; i++) {
+		void __iomem *base = irq_base(i);
 
-	for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
-		saved_icmr[i] = _ICMR(irq);
-		_ICMR(irq) = 0;
+		saved_icmr[i] = __raw_readl(base + ICMR);
+		__raw_writel(0, base + ICMR);
 	}
 
-	if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
+	if (cpu_has_ipr) {
 		for (i = 0; i < pxa_internal_irq_nr; i++)
-			saved_ipr[i] = IPR(i);
+			saved_ipr[i] = __raw_readl(pxa_irq_base + IPR(i));
 	}
 
 	return 0;
 }
 
-static int pxa_irq_resume(struct sys_device *dev)
+static void pxa_irq_resume(void)
 {
-	int i, irq = PXA_IRQ(0);
+	int i;
 
-	if (cpu_is_pxa27x() || cpu_is_pxa3xx()) {
-		for (i = 0; i < pxa_internal_irq_nr; i++)
-			IPR(i) = saved_ipr[i];
-	}
+	for (i = 0; i < pxa_internal_irq_nr / 32; i++) {
+		void __iomem *base = irq_base(i);
 
-	for (i = 0; irq < PXA_IRQ(pxa_internal_irq_nr); i++, irq += 32) {
-		_ICMR(irq) = saved_icmr[i];
-		_ICLR(irq) = 0;
+		__raw_writel(saved_icmr[i], base + ICMR);
+		__raw_writel(0, base + ICLR);
 	}
 
-	ICCR = 1;
-	return 0;
+	if (cpu_has_ipr)
+		for (i = 0; i < pxa_internal_irq_nr; i++)
+			__raw_writel(saved_ipr[i], pxa_irq_base + IPR(i));
+
+	__raw_writel(1, pxa_irq_base + ICCR);
 }
 #else
 #define pxa_irq_suspend		NULL
 #define pxa_irq_resume		NULL
 #endif
 
-struct sysdev_class pxa_irq_sysclass = {
-	.name		= "irq",
+struct syscore_ops pxa_irq_syscore_ops = {
 	.suspend	= pxa_irq_suspend,
 	.resume		= pxa_irq_resume,
 };
 
-static int __init pxa_irq_init(void)
+#ifdef CONFIG_OF
+static struct irq_domain *pxa_irq_domain;
+
+static int pxa_irq_map(struct irq_domain *h, unsigned int virq,
+		       irq_hw_number_t hw)
 {
-	return sysdev_class_register(&pxa_irq_sysclass);
+	void __iomem *base = irq_base(hw / 32);
+
+	/* initialize interrupt priority */
+	if (cpu_has_ipr)
+		__raw_writel(hw | IPR_VALID, pxa_irq_base + IPR(hw));
+
+	irq_set_chip_and_handler(hw, &pxa_internal_irq_chip,
+				 handle_level_irq);
+	irq_set_chip_data(hw, base);
+	set_irq_flags(hw, IRQF_VALID);
+
+	return 0;
 }
 
-core_initcall(pxa_irq_init);
+static struct irq_domain_ops pxa_irq_ops = {
+	.map    = pxa_irq_map,
+	.xlate  = irq_domain_xlate_onecell,
+};
+
+static const struct of_device_id intc_ids[] __initconst = {
+	{ .compatible = "marvell,pxa-intc", },
+	{}
+};
+
+void __init pxa_dt_irq_init(int (*fn)(struct irq_data *, unsigned int))
+{
+	struct device_node *node;
+	struct resource res;
+	int n, ret;
+
+	node = of_find_matching_node(NULL, intc_ids);
+	if (!node) {
+		pr_err("Failed to find interrupt controller in arch-pxa\n");
+		return;
+	}
+
+	ret = of_property_read_u32(node, "marvell,intc-nr-irqs",
+				   &pxa_internal_irq_nr);
+	if (ret) {
+		pr_err("Not found marvell,intc-nr-irqs property\n");
+		return;
+	}
+
+	ret = of_address_to_resource(node, 0, &res);
+	if (ret < 0) {
+		pr_err("No registers defined for node\n");
+		return;
+	}
+	pxa_irq_base = io_p2v(res.start);
+
+	if (of_find_property(node, "marvell,intc-priority", NULL))
+		cpu_has_ipr = 1;
+
+	ret = irq_alloc_descs(-1, 0, pxa_internal_irq_nr, 0);
+	if (ret < 0) {
+		pr_err("Failed to allocate IRQ numbers\n");
+		return;
+	}
+
+	pxa_irq_domain = irq_domain_add_legacy(node, pxa_internal_irq_nr, 0, 0,
+					       &pxa_irq_ops, NULL);
+	if (!pxa_irq_domain)
+		panic("Unable to add PXA IRQ domain\n");
+
+	irq_set_default_host(pxa_irq_domain);
+
+	for (n = 0; n < pxa_internal_irq_nr; n += 32) {
+		void __iomem *base = irq_base(n >> 5);
+
+		__raw_writel(0, base + ICMR);	/* disable all IRQs */
+		__raw_writel(0, base + ICLR);	/* all IRQs are IRQ, not FIQ */
+	}
+
+	/* only unmasked interrupts kick us out of idle */
+	__raw_writel(1, irq_base(0) + ICCR);
+
+	pxa_internal_irq_chip.irq_set_wake = fn;
+}
+#endif /* CONFIG_OF */