ARM: EXYNOS4: Update IRQ part

This patch updates IRQ part of EXYNOS4 according to the change of
ARCH name, EXYNOS4.

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

4 files changed, 521 insertions, 0 deletions

diff --git a/arch/arm/mach-exynos4/include/mach/irqs.h b/arch/arm/mach-exynos4/include/mach/irqs.h
new file mode 100644
index 0000000..2dc5900
--- /dev/null
+++ b/arch/arm/mach-exynos4/include/mach/irqs.h
@@ -0,0 +1,146 @@
+/* linux/arch/arm/mach-exynos4/include/mach/irqs.h
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * EXYNOS4 - IRQ definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __ASM_ARCH_IRQS_H
+#define __ASM_ARCH_IRQS_H __FILE__
+
+#include <plat/irqs.h>
+
+/* PPI: Private Peripheral Interrupt */
+
+#define IRQ_PPI(x)		S5P_IRQ(x+16)
+
+#define IRQ_LOCALTIMER		IRQ_PPI(13)
+
+/* SPI: Shared Peripheral Interrupt */
+
+#define IRQ_SPI(x)		S5P_IRQ(x+32)
+
+#define IRQ_MCT1		IRQ_SPI(35)
+
+#define IRQ_EINT0		IRQ_SPI(40)
+#define IRQ_EINT1		IRQ_SPI(41)
+#define IRQ_EINT2		IRQ_SPI(42)
+#define IRQ_EINT3		IRQ_SPI(43)
+#define IRQ_USB_HSOTG		IRQ_SPI(44)
+#define IRQ_USB_HOST		IRQ_SPI(45)
+#define IRQ_MODEM_IF		IRQ_SPI(46)
+#define IRQ_ROTATOR		IRQ_SPI(47)
+#define IRQ_JPEG		IRQ_SPI(48)
+#define IRQ_2D			IRQ_SPI(49)
+#define IRQ_PCIE		IRQ_SPI(50)
+#define IRQ_MCT0		IRQ_SPI(51)
+#define IRQ_MFC			IRQ_SPI(52)
+#define IRQ_AUDIO_SS		IRQ_SPI(54)
+#define IRQ_AC97		IRQ_SPI(55)
+#define IRQ_SPDIF		IRQ_SPI(56)
+#define IRQ_KEYPAD		IRQ_SPI(57)
+#define IRQ_INTFEEDCTRL_SSS	IRQ_SPI(58)
+#define IRQ_SLIMBUS		IRQ_SPI(59)
+#define IRQ_PMU			IRQ_SPI(60)
+#define IRQ_TSI			IRQ_SPI(61)
+#define IRQ_SATA		IRQ_SPI(62)
+#define IRQ_GPS			IRQ_SPI(63)
+
+#define MAX_IRQ_IN_COMBINER	8
+#define COMBINER_GROUP(x)	((x) * MAX_IRQ_IN_COMBINER + IRQ_SPI(64))
+#define COMBINER_IRQ(x, y)	(COMBINER_GROUP(x) + y)
+
+#define IRQ_SYSMMU_MDMA0_0	COMBINER_IRQ(4, 0)
+#define IRQ_SYSMMU_SSS_0	COMBINER_IRQ(4, 1)
+#define IRQ_SYSMMU_FIMC0_0	COMBINER_IRQ(4, 2)
+#define IRQ_SYSMMU_FIMC1_0	COMBINER_IRQ(4, 3)
+#define IRQ_SYSMMU_FIMC2_0	COMBINER_IRQ(4, 4)
+#define IRQ_SYSMMU_FIMC3_0	COMBINER_IRQ(4, 5)
+#define IRQ_SYSMMU_JPEG_0	COMBINER_IRQ(4, 6)
+#define IRQ_SYSMMU_2D_0		COMBINER_IRQ(4, 7)
+
+#define IRQ_SYSMMU_ROTATOR_0	COMBINER_IRQ(5, 0)
+#define IRQ_SYSMMU_MDMA1_0	COMBINER_IRQ(5, 1)
+#define IRQ_SYSMMU_LCD0_M0_0	COMBINER_IRQ(5, 2)
+#define IRQ_SYSMMU_LCD1_M1_0	COMBINER_IRQ(5, 3)
+#define IRQ_SYSMMU_TV_M0_0	COMBINER_IRQ(5, 4)
+#define IRQ_SYSMMU_MFC_M0_0	COMBINER_IRQ(5, 5)
+#define IRQ_SYSMMU_MFC_M1_0	COMBINER_IRQ(5, 6)
+#define IRQ_SYSMMU_PCIE_0	COMBINER_IRQ(5, 7)
+
+#define IRQ_PDMA0		COMBINER_IRQ(21, 0)
+#define IRQ_PDMA1		COMBINER_IRQ(21, 1)
+
+#define IRQ_TIMER0_VIC		COMBINER_IRQ(22, 0)
+#define IRQ_TIMER1_VIC		COMBINER_IRQ(22, 1)
+#define IRQ_TIMER2_VIC		COMBINER_IRQ(22, 2)
+#define IRQ_TIMER3_VIC		COMBINER_IRQ(22, 3)
+#define IRQ_TIMER4_VIC		COMBINER_IRQ(22, 4)
+
+#define IRQ_RTC_ALARM		COMBINER_IRQ(23, 0)
+#define IRQ_RTC_TIC		COMBINER_IRQ(23, 1)
+
+#define IRQ_UART0		COMBINER_IRQ(26, 0)
+#define IRQ_UART1		COMBINER_IRQ(26, 1)
+#define IRQ_UART2		COMBINER_IRQ(26, 2)
+#define IRQ_UART3		COMBINER_IRQ(26, 3)
+#define IRQ_UART4		COMBINER_IRQ(26, 4)
+
+#define IRQ_IIC			COMBINER_IRQ(27, 0)
+#define IRQ_IIC1		COMBINER_IRQ(27, 1)
+#define IRQ_IIC2		COMBINER_IRQ(27, 2)
+#define IRQ_IIC3		COMBINER_IRQ(27, 3)
+#define IRQ_IIC4		COMBINER_IRQ(27, 4)
+#define IRQ_IIC5		COMBINER_IRQ(27, 5)
+#define IRQ_IIC6		COMBINER_IRQ(27, 6)
+#define IRQ_IIC7		COMBINER_IRQ(27, 7)
+
+#define IRQ_HSMMC0		COMBINER_IRQ(29, 0)
+#define IRQ_HSMMC1		COMBINER_IRQ(29, 1)
+#define IRQ_HSMMC2		COMBINER_IRQ(29, 2)
+#define IRQ_HSMMC3		COMBINER_IRQ(29, 3)
+
+#define IRQ_MIPI_CSIS0		COMBINER_IRQ(30, 0)
+#define IRQ_MIPI_CSIS1		COMBINER_IRQ(30, 1)
+
+#define IRQ_ONENAND_AUDI	COMBINER_IRQ(34, 0)
+
+#define IRQ_MCT_L1		COMBINER_IRQ(35, 3)
+
+#define IRQ_EINT4		COMBINER_IRQ(37, 0)
+#define IRQ_EINT5		COMBINER_IRQ(37, 1)
+#define IRQ_EINT6		COMBINER_IRQ(37, 2)
+#define IRQ_EINT7		COMBINER_IRQ(37, 3)
+#define IRQ_EINT8		COMBINER_IRQ(38, 0)
+
+#define IRQ_EINT9		COMBINER_IRQ(38, 1)
+#define IRQ_EINT10		COMBINER_IRQ(38, 2)
+#define IRQ_EINT11		COMBINER_IRQ(38, 3)
+#define IRQ_EINT12		COMBINER_IRQ(38, 4)
+#define IRQ_EINT13		COMBINER_IRQ(38, 5)
+#define IRQ_EINT14		COMBINER_IRQ(38, 6)
+#define IRQ_EINT15		COMBINER_IRQ(38, 7)
+
+#define IRQ_EINT16_31		COMBINER_IRQ(39, 0)
+
+#define IRQ_MCT_L0		COMBINER_IRQ(51, 0)
+
+#define IRQ_WDT			COMBINER_IRQ(53, 0)
+
+#define MAX_COMBINER_NR		54
+
+#define S5P_IRQ_EINT_BASE	COMBINER_IRQ(MAX_COMBINER_NR, 0)
+
+#define S5P_EINT_BASE1		(S5P_IRQ_EINT_BASE + 0)
+#define S5P_EINT_BASE2		(S5P_IRQ_EINT_BASE + 16)
+
+/* Set the default NR_IRQS */
+
+#define NR_IRQS			(S5P_IRQ_EINT_BASE + 32)
+
+#endif /* __ASM_ARCH_IRQS_H */
diff --git a/arch/arm/mach-exynos4/include/mach/regs-irq.h b/arch/arm/mach-exynos4/include/mach/regs-irq.h
new file mode 100644
index 0000000..9c7b4bf
--- /dev/null
+++ b/arch/arm/mach-exynos4/include/mach/regs-irq.h
@@ -0,0 +1,19 @@
+/* linux/arch/arm/mach-exynos4/include/mach/regs-irq.h
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * EXYNOS4 - IRQ register definitions
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#ifndef __ASM_ARCH_REGS_IRQ_H
+#define __ASM_ARCH_REGS_IRQ_H __FILE__
+
+#include <asm/hardware/gic.h>
+#include <mach/map.h>
+
+#endif /* __ASM_ARCH_REGS_IRQ_H */
diff --git a/arch/arm/mach-exynos4/irq-combiner.c b/arch/arm/mach-exynos4/irq-combiner.c
new file mode 100644
index 0000000..31618d9
--- /dev/null
+++ b/arch/arm/mach-exynos4/irq-combiner.c
@@ -0,0 +1,127 @@
+/* linux/arch/arm/mach-exynos4/irq-combiner.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * Based on arch/arm/common/gic.c
+ *
+ * IRQ COMBINER support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/io.h>
+
+#include <asm/mach/irq.h>
+
+#define COMBINER_ENABLE_SET	0x0
+#define COMBINER_ENABLE_CLEAR	0x4
+#define COMBINER_INT_STATUS	0xC
+
+static DEFINE_SPINLOCK(irq_controller_lock);
+
+struct combiner_chip_data {
+	unsigned int irq_offset;
+	unsigned int irq_mask;
+	void __iomem *base;
+};
+
+static struct combiner_chip_data combiner_data[MAX_COMBINER_NR];
+
+static inline void __iomem *combiner_base(struct irq_data *data)
+{
+	struct combiner_chip_data *combiner_data =
+		irq_data_get_irq_chip_data(data);
+
+	return combiner_data->base;
+}
+
+static void combiner_mask_irq(struct irq_data *data)
+{
+	u32 mask = 1 << (data->irq % 32);
+
+	__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_CLEAR);
+}
+
+static void combiner_unmask_irq(struct irq_data *data)
+{
+	u32 mask = 1 << (data->irq % 32);
+
+	__raw_writel(mask, combiner_base(data) + COMBINER_ENABLE_SET);
+}
+
+static void combiner_handle_cascade_irq(unsigned int irq, struct irq_desc *desc)
+{
+	struct combiner_chip_data *chip_data = get_irq_data(irq);
+	struct irq_chip *chip = get_irq_chip(irq);
+	unsigned int cascade_irq, combiner_irq;
+	unsigned long status;
+
+	/* primary controller ack'ing */
+	chip->irq_ack(&desc->irq_data);
+
+	spin_lock(&irq_controller_lock);
+	status = __raw_readl(chip_data->base + COMBINER_INT_STATUS);
+	spin_unlock(&irq_controller_lock);
+	status &= chip_data->irq_mask;
+
+	if (status == 0)
+		goto out;
+
+	combiner_irq = __ffs(status);
+
+	cascade_irq = combiner_irq + (chip_data->irq_offset & ~31);
+	if (unlikely(cascade_irq >= NR_IRQS))
+		do_bad_IRQ(cascade_irq, desc);
+	else
+		generic_handle_irq(cascade_irq);
+
+ out:
+	/* primary controller unmasking */
+	chip->irq_unmask(&desc->irq_data);
+}
+
+static struct irq_chip combiner_chip = {
+	.name		= "COMBINER",
+	.irq_mask	= combiner_mask_irq,
+	.irq_unmask	= combiner_unmask_irq,
+};
+
+void __init combiner_cascade_irq(unsigned int combiner_nr, unsigned int irq)
+{
+	if (combiner_nr >= MAX_COMBINER_NR)
+		BUG();
+	if (set_irq_data(irq, &combiner_data[combiner_nr]) != 0)
+		BUG();
+	set_irq_chained_handler(irq, combiner_handle_cascade_irq);
+}
+
+void __init combiner_init(unsigned int combiner_nr, void __iomem *base,
+			  unsigned int irq_start)
+{
+	unsigned int i;
+
+	if (combiner_nr >= MAX_COMBINER_NR)
+		BUG();
+
+	combiner_data[combiner_nr].base = base;
+	combiner_data[combiner_nr].irq_offset = irq_start;
+	combiner_data[combiner_nr].irq_mask = 0xff << ((combiner_nr % 4) << 3);
+
+	/* Disable all interrupts */
+
+	__raw_writel(combiner_data[combiner_nr].irq_mask,
+		     base + COMBINER_ENABLE_CLEAR);
+
+	/* Setup the Linux IRQ subsystem */
+
+	for (i = irq_start; i < combiner_data[combiner_nr].irq_offset
+				+ MAX_IRQ_IN_COMBINER; i++) {
+		set_irq_chip(i, &combiner_chip);
+		set_irq_chip_data(i, &combiner_data[combiner_nr]);
+		set_irq_handler(i, handle_level_irq);
+		set_irq_flags(i, IRQF_VALID | IRQF_PROBE);
+	}
+}
diff --git a/arch/arm/mach-exynos4/irq-eint.c b/arch/arm/mach-exynos4/irq-eint.c
new file mode 100644
index 0000000..4f7ad4a
--- /dev/null
+++ b/arch/arm/mach-exynos4/irq-eint.c
@@ -0,0 +1,229 @@
+/* linux/arch/arm/mach-exynos4/irq-eint.c
+ *
+ * Copyright (c) 2010-2011 Samsung Electronics Co., Ltd.
+ *		http://www.samsung.com
+ *
+ * EXYNOS4 - IRQ EINT support
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+#include <linux/kernel.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/sysdev.h>
+#include <linux/gpio.h>
+
+#include <plat/pm.h>
+#include <plat/cpu.h>
+#include <plat/gpio-cfg.h>
+
+#include <mach/regs-gpio.h>
+
+static DEFINE_SPINLOCK(eint_lock);
+
+static unsigned int eint0_15_data[16];
+
+static unsigned int exynos4_get_irq_nr(unsigned int number)
+{
+	u32 ret = 0;
+
+	switch (number) {
+	case 0 ... 3:
+		ret = (number + IRQ_EINT0);
+		break;
+	case 4 ... 7:
+		ret = (number + (IRQ_EINT4 - 4));
+		break;
+	case 8 ... 15:
+		ret = (number + (IRQ_EINT8 - 8));
+		break;
+	default:
+		printk(KERN_ERR "number available : %d\n", number);
+	}
+
+	return ret;
+}
+
+static inline void exynos4_irq_eint_mask(struct irq_data *data)
+{
+	u32 mask;
+
+	spin_lock(&eint_lock);
+	mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(data->irq)));
+	mask |= eint_irq_to_bit(data->irq);
+	__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(data->irq)));
+	spin_unlock(&eint_lock);
+}
+
+static void exynos4_irq_eint_unmask(struct irq_data *data)
+{
+	u32 mask;
+
+	spin_lock(&eint_lock);
+	mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(data->irq)));
+	mask &= ~(eint_irq_to_bit(data->irq));
+	__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(data->irq)));
+	spin_unlock(&eint_lock);
+}
+
+static inline void exynos4_irq_eint_ack(struct irq_data *data)
+{
+	__raw_writel(eint_irq_to_bit(data->irq),
+		     S5P_EINT_PEND(EINT_REG_NR(data->irq)));
+}
+
+static void exynos4_irq_eint_maskack(struct irq_data *data)
+{
+	exynos4_irq_eint_mask(data);
+	exynos4_irq_eint_ack(data);
+}
+
+static int exynos4_irq_eint_set_type(struct irq_data *data, unsigned int type)
+{
+	int offs = EINT_OFFSET(data->irq);
+	int shift;
+	u32 ctrl, mask;
+	u32 newvalue = 0;
+
+	switch (type) {
+	case IRQ_TYPE_EDGE_RISING:
+		newvalue = S5P_IRQ_TYPE_EDGE_RISING;
+		break;
+
+	case IRQ_TYPE_EDGE_FALLING:
+		newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
+		break;
+
+	case IRQ_TYPE_EDGE_BOTH:
+		newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
+		break;
+
+	case IRQ_TYPE_LEVEL_LOW:
+		newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
+		break;
+
+	case IRQ_TYPE_LEVEL_HIGH:
+		newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
+		break;
+
+	default:
+		printk(KERN_ERR "No such irq type %d", type);
+		return -EINVAL;
+	}
+
+	shift = (offs & 0x7) * 4;
+	mask = 0x7 << shift;
+
+	spin_lock(&eint_lock);
+	ctrl = __raw_readl(S5P_EINT_CON(EINT_REG_NR(data->irq)));
+	ctrl &= ~mask;
+	ctrl |= newvalue << shift;
+	__raw_writel(ctrl, S5P_EINT_CON(EINT_REG_NR(data->irq)));
+	spin_unlock(&eint_lock);
+
+	switch (offs) {
+	case 0 ... 7:
+		s3c_gpio_cfgpin(EINT_GPIO_0(offs & 0x7), EINT_MODE);
+		break;
+	case 8 ... 15:
+		s3c_gpio_cfgpin(EINT_GPIO_1(offs & 0x7), EINT_MODE);
+		break;
+	case 16 ... 23:
+		s3c_gpio_cfgpin(EINT_GPIO_2(offs & 0x7), EINT_MODE);
+		break;
+	case 24 ... 31:
+		s3c_gpio_cfgpin(EINT_GPIO_3(offs & 0x7), EINT_MODE);
+		break;
+	default:
+		printk(KERN_ERR "No such irq number %d", offs);
+	}
+
+	return 0;
+}
+
+static struct irq_chip exynos4_irq_eint = {
+	.name		= "exynos4-eint",
+	.irq_mask	= exynos4_irq_eint_mask,
+	.irq_unmask	= exynos4_irq_eint_unmask,
+	.irq_mask_ack	= exynos4_irq_eint_maskack,
+	.irq_ack	= exynos4_irq_eint_ack,
+	.irq_set_type	= exynos4_irq_eint_set_type,
+#ifdef CONFIG_PM
+	.irq_set_wake	= s3c_irqext_wake,
+#endif
+};
+
+/* exynos4_irq_demux_eint
+ *
+ * This function demuxes the IRQ from from EINTs 16 to 31.
+ * It is designed to be inlined into the specific handler
+ * s5p_irq_demux_eintX_Y.
+ *
+ * Each EINT pend/mask registers handle eight of them.
+ */
+static inline void exynos4_irq_demux_eint(unsigned int start)
+{
+	unsigned int irq;
+
+	u32 status = __raw_readl(S5P_EINT_PEND(EINT_REG_NR(start)));
+	u32 mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(start)));
+
+	status &= ~mask;
+	status &= 0xff;
+
+	while (status) {
+		irq = fls(status) - 1;
+		generic_handle_irq(irq + start);
+		status &= ~(1 << irq);
+	}
+}
+
+static void exynos4_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
+{
+	exynos4_irq_demux_eint(IRQ_EINT(16));
+	exynos4_irq_demux_eint(IRQ_EINT(24));
+}
+
+static void exynos4_irq_eint0_15(unsigned int irq, struct irq_desc *desc)
+{
+	u32 *irq_data = get_irq_data(irq);
+	struct irq_chip *chip = get_irq_chip(irq);
+
+	chip->irq_mask(&desc->irq_data);
+
+	if (chip->irq_ack)
+		chip->irq_ack(&desc->irq_data);
+
+	generic_handle_irq(*irq_data);
+
+	chip->irq_unmask(&desc->irq_data);
+}
+
+int __init exynos4_init_irq_eint(void)
+{
+	int irq;
+
+	for (irq = 0 ; irq <= 31 ; irq++) {
+		set_irq_chip(IRQ_EINT(irq), &exynos4_irq_eint);
+		set_irq_handler(IRQ_EINT(irq), handle_level_irq);
+		set_irq_flags(IRQ_EINT(irq), IRQF_VALID);
+	}
+
+	set_irq_chained_handler(IRQ_EINT16_31, exynos4_irq_demux_eint16_31);
+
+	for (irq = 0 ; irq <= 15 ; irq++) {
+		eint0_15_data[irq] = IRQ_EINT(irq);
+
+		set_irq_data(exynos4_get_irq_nr(irq), &eint0_15_data[irq]);
+		set_irq_chained_handler(exynos4_get_irq_nr(irq),
+					exynos4_irq_eint0_15);
+	}
+
+	return 0;
+}
+
+arch_initcall(exynos4_init_irq_eint);