[deliverable/linux.git] / arch / arm / plat-samsung / s5p-irq-eint.c

/*
 * Copyright (c) 2010 Samsung Electronics Co., Ltd.
 *		http://www.samsung.com
 *
 * S5P - 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/device.h>
#include <linux/gpio.h>
#include <linux/irqchip/arm-vic.h>
#include <linux/of.h>

#include <plat/regs-irqtype.h>

#include <mach/map.h>
#include <plat/cpu.h>
#include <plat/pm.h>

#include <plat/gpio-cfg.h>
#include <mach/regs-gpio.h>

static inline void s5p_irq_eint_mask(struct irq_data *data)
{
	u32 mask;

	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)));
}

static void s5p_irq_eint_unmask(struct irq_data *data)
{
	u32 mask;

	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)));
}

static inline void s5p_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 s5p_irq_eint_maskack(struct irq_data *data)
{
	/* compiler should in-line these */
	s5p_irq_eint_mask(data);
	s5p_irq_eint_ack(data);
}

static int s5p_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;

	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)));

	if ((0 <= offs) && (offs < 8))
		s3c_gpio_cfgpin(EINT_GPIO_0(offs & 0x7), EINT_MODE);

	else if ((8 <= offs) && (offs < 16))
		s3c_gpio_cfgpin(EINT_GPIO_1(offs & 0x7), EINT_MODE);

	else if ((16 <= offs) && (offs < 24))
		s3c_gpio_cfgpin(EINT_GPIO_2(offs & 0x7), EINT_MODE);

	else if ((24 <= offs) && (offs < 32))
		s3c_gpio_cfgpin(EINT_GPIO_3(offs & 0x7), EINT_MODE);

	else
		printk(KERN_ERR "No such irq number %d", offs);

	return 0;
}

static struct irq_chip s5p_irq_eint = {
	.name		= "s5p-eint",
	.irq_mask	= s5p_irq_eint_mask,
	.irq_unmask	= s5p_irq_eint_unmask,
	.irq_mask_ack	= s5p_irq_eint_maskack,
	.irq_ack	= s5p_irq_eint_ack,
	.irq_set_type	= s5p_irq_eint_set_type,
#ifdef CONFIG_PM
	.irq_set_wake	= s3c_irqext_wake,
#endif
};

/* s5p_irq_demux_eint
 *
 * This function demuxes the IRQ from the group0 external interrupts,
 * 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 s5p_irq_demux_eint(unsigned int start)
{
	u32 status = __raw_readl(S5P_EINT_PEND(EINT_REG_NR(start)));
	u32 mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(start)));
	unsigned int irq;

	status &= ~mask;
	status &= 0xff;

	while (status) {
		irq = fls(status) - 1;
		generic_handle_irq(irq + start);
		status &= ~(1 << irq);
	}
}

static void s5p_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
{
	s5p_irq_demux_eint(IRQ_EINT(16));
	s5p_irq_demux_eint(IRQ_EINT(24));
}

static inline void s5p_irq_vic_eint_mask(struct irq_data *data)
{
	void __iomem *base = irq_data_get_irq_chip_data(data);

	s5p_irq_eint_mask(data);
	writel(1 << EINT_OFFSET(data->irq), base + VIC_INT_ENABLE_CLEAR);
}

static void s5p_irq_vic_eint_unmask(struct irq_data *data)
{
	void __iomem *base = irq_data_get_irq_chip_data(data);

	s5p_irq_eint_unmask(data);
	writel(1 << EINT_OFFSET(data->irq), base + VIC_INT_ENABLE);
}

static inline void s5p_irq_vic_eint_ack(struct irq_data *data)
{
	__raw_writel(eint_irq_to_bit(data->irq),
		     S5P_EINT_PEND(EINT_REG_NR(data->irq)));
}

static void s5p_irq_vic_eint_maskack(struct irq_data *data)
{
	s5p_irq_vic_eint_mask(data);
	s5p_irq_vic_eint_ack(data);
}

static struct irq_chip s5p_irq_vic_eint = {
	.name		= "s5p_vic_eint",
	.irq_mask	= s5p_irq_vic_eint_mask,
	.irq_unmask	= s5p_irq_vic_eint_unmask,
	.irq_mask_ack	= s5p_irq_vic_eint_maskack,
	.irq_ack	= s5p_irq_vic_eint_ack,
	.irq_set_type	= s5p_irq_eint_set_type,
#ifdef CONFIG_PM
	.irq_set_wake	= s3c_irqext_wake,
#endif
};

static int __init s5p_init_irq_eint(void)
{
	int irq;

	if (of_have_populated_dt())
		return -ENODEV;

	for (irq = IRQ_EINT(0); irq <= IRQ_EINT(15); irq++)
		irq_set_chip(irq, &s5p_irq_vic_eint);

	for (irq = IRQ_EINT(16); irq <= IRQ_EINT(31); irq++) {
		irq_set_chip_and_handler(irq, &s5p_irq_eint, handle_level_irq);
		set_irq_flags(irq, IRQF_VALID);
	}

	irq_set_chained_handler(IRQ_EINT16_31, s5p_irq_demux_eint16_31);
	return 0;
}

arch_initcall(s5p_init_irq_eint);
Commit	Line	Data
68ae8998	1	/*
0df04f82 JL	2	* Copyright (c) 2010 Samsung Electronics Co., Ltd.
	3	* http://www.samsung.com
	4	*
	5	* S5P - IRQ EINT support
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11
	12	#include <linux/kernel.h>
	13	#include <linux/interrupt.h>
	14	#include <linux/irq.h>
	15	#include <linux/io.h>
edbaa603	16	#include <linux/device.h>
0df04f82	17	#include <linux/gpio.h>
9e47b8bf	18	#include <linux/irqchip/arm-vic.h>
bffd649d	19	#include <linux/of.h>
0df04f82 JL	20
	21	#include <plat/regs-irqtype.h>
	22
	23	#include <mach/map.h>
	24	#include <plat/cpu.h>
	25	#include <plat/pm.h>
	26
	27	#include <plat/gpio-cfg.h>
	28	#include <mach/regs-gpio.h>
	29
bb0b2374	30	static inline void s5p_irq_eint_mask(struct irq_data *data)
0df04f82 JL	31	{
	32	u32 mask;
	33
bb0b2374 LB	34	mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(data->irq)));
	35	mask \|= eint_irq_to_bit(data->irq);
	36	__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(data->irq)));
0df04f82 JL	37	}
0df04f82 JL	38
bb0b2374	39	static void s5p_irq_eint_unmask(struct irq_data *data)
0df04f82 JL	40	{
	41	u32 mask;
	42
bb0b2374 LB	43	mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(data->irq)));
	44	mask &= ~(eint_irq_to_bit(data->irq));
	45	__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(data->irq)));
0df04f82 JL	46	}
0df04f82 JL	47
bb0b2374	48	static inline void s5p_irq_eint_ack(struct irq_data *data)
0df04f82	49	{
bb0b2374 LB	50	__raw_writel(eint_irq_to_bit(data->irq),
bb0b2374 LB	51	S5P_EINT_PEND(EINT_REG_NR(data->irq)));
0df04f82 JL	52	}
0df04f82 JL	53
bb0b2374	54	static void s5p_irq_eint_maskack(struct irq_data *data)
0df04f82 JL	55	{
0df04f82 JL	56	/* compiler should in-line these */
bb0b2374 LB	57	s5p_irq_eint_mask(data);
bb0b2374 LB	58	s5p_irq_eint_ack(data);
0df04f82 JL	59	}
0df04f82 JL	60
bb0b2374	61	static int s5p_irq_eint_set_type(struct irq_data *data, unsigned int type)
0df04f82	62	{
bb0b2374	63	int offs = EINT_OFFSET(data->irq);
0df04f82 JL	64	int shift;
	65	u32 ctrl, mask;
	66	u32 newvalue = 0;
	67
	68	switch (type) {
	69	case IRQ_TYPE_EDGE_RISING:
9adf5d22	70	newvalue = S5P_IRQ_TYPE_EDGE_RISING;
0df04f82 JL	71	break;
	72
	73	case IRQ_TYPE_EDGE_FALLING:
9adf5d22	74	newvalue = S5P_IRQ_TYPE_EDGE_FALLING;
0df04f82 JL	75	break;
	76
	77	case IRQ_TYPE_EDGE_BOTH:
9adf5d22	78	newvalue = S5P_IRQ_TYPE_EDGE_BOTH;
0df04f82 JL	79	break;
	80
	81	case IRQ_TYPE_LEVEL_LOW:
9adf5d22	82	newvalue = S5P_IRQ_TYPE_LEVEL_LOW;
0df04f82 JL	83	break;
	84
	85	case IRQ_TYPE_LEVEL_HIGH:
9adf5d22	86	newvalue = S5P_IRQ_TYPE_LEVEL_HIGH;
0df04f82 JL	87	break;
	88
	89	default:
	90	printk(KERN_ERR "No such irq type %d", type);
	91	return -EINVAL;
	92	}
	93
	94	shift = (offs & 0x7) * 4;
	95	mask = 0x7 << shift;
	96
bb0b2374	97	ctrl = __raw_readl(S5P_EINT_CON(EINT_REG_NR(data->irq)));
0df04f82 JL	98	ctrl &= ~mask;
0df04f82 JL	99	ctrl \|= newvalue << shift;
bb0b2374	100	__raw_writel(ctrl, S5P_EINT_CON(EINT_REG_NR(data->irq)));
0df04f82 JL	101
	102	if ((0 <= offs) && (offs < 8))
	103	s3c_gpio_cfgpin(EINT_GPIO_0(offs & 0x7), EINT_MODE);
	104
	105	else if ((8 <= offs) && (offs < 16))
	106	s3c_gpio_cfgpin(EINT_GPIO_1(offs & 0x7), EINT_MODE);
	107
	108	else if ((16 <= offs) && (offs < 24))
	109	s3c_gpio_cfgpin(EINT_GPIO_2(offs & 0x7), EINT_MODE);
	110
	111	else if ((24 <= offs) && (offs < 32))
	112	s3c_gpio_cfgpin(EINT_GPIO_3(offs & 0x7), EINT_MODE);
	113
	114	else
	115	printk(KERN_ERR "No such irq number %d", offs);
	116
	117	return 0;
	118	}
	119
	120	static struct irq_chip s5p_irq_eint = {
	121	.name = "s5p-eint",
bb0b2374 LB	122	.irq_mask = s5p_irq_eint_mask,
	123	.irq_unmask = s5p_irq_eint_unmask,
	124	.irq_mask_ack = s5p_irq_eint_maskack,
	125	.irq_ack = s5p_irq_eint_ack,
	126	.irq_set_type = s5p_irq_eint_set_type,
0df04f82	127	#ifdef CONFIG_PM
f5aeffb7	128	.irq_set_wake = s3c_irqext_wake,
0df04f82 JL	129	#endif
	130	};
	131
	132	/* s5p_irq_demux_eint
	133	*
	134	* This function demuxes the IRQ from the group0 external interrupts,
	135	* from EINTs 16 to 31. It is designed to be inlined into the specific
	136	* handler s5p_irq_demux_eintX_Y.
	137	*
	138	* Each EINT pend/mask registers handle eight of them.
	139	*/
	140	static inline void s5p_irq_demux_eint(unsigned int start)
	141	{
5fae4058	142	u32 status = __raw_readl(S5P_EINT_PEND(EINT_REG_NR(start)));
0df04f82 JL	143	u32 mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(start)));
	144	unsigned int irq;
	145
0df04f82 JL	146	status &= ~mask;
	147	status &= 0xff;
	148
	149	while (status) {
5fae4058 PB	150	irq = fls(status) - 1;
5fae4058 PB	151	generic_handle_irq(irq + start);
0df04f82 JL	152	status &= ~(1 << irq);
	153	}
	154	}
	155
	156	static void s5p_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
	157	{
	158	s5p_irq_demux_eint(IRQ_EINT(16));
	159	s5p_irq_demux_eint(IRQ_EINT(24));
	160	}
	161
bb0b2374	162	static inline void s5p_irq_vic_eint_mask(struct irq_data *data)
0df04f82	163	{
bb0b2374	164	void __iomem *base = irq_data_get_irq_chip_data(data);
5fae4058	165
bb0b2374 LB	166	s5p_irq_eint_mask(data);
bb0b2374 LB	167	writel(1 << EINT_OFFSET(data->irq), base + VIC_INT_ENABLE_CLEAR);
0df04f82 JL	168	}
0df04f82 JL	169
bb0b2374	170	static void s5p_irq_vic_eint_unmask(struct irq_data *data)
0df04f82	171	{
bb0b2374	172	void __iomem *base = irq_data_get_irq_chip_data(data);
5fae4058	173
bb0b2374 LB	174	s5p_irq_eint_unmask(data);
bb0b2374 LB	175	writel(1 << EINT_OFFSET(data->irq), base + VIC_INT_ENABLE);
0df04f82 JL	176	}
0df04f82 JL	177
bb0b2374	178	static inline void s5p_irq_vic_eint_ack(struct irq_data *data)
0df04f82	179	{
bb0b2374 LB	180	__raw_writel(eint_irq_to_bit(data->irq),
bb0b2374 LB	181	S5P_EINT_PEND(EINT_REG_NR(data->irq)));
0df04f82 JL	182	}
0df04f82 JL	183
bb0b2374	184	static void s5p_irq_vic_eint_maskack(struct irq_data *data)
0df04f82	185	{
bb0b2374 LB	186	s5p_irq_vic_eint_mask(data);
bb0b2374 LB	187	s5p_irq_vic_eint_ack(data);
0df04f82 JL	188	}
	189
	190	static struct irq_chip s5p_irq_vic_eint = {
	191	.name = "s5p_vic_eint",
bb0b2374 LB	192	.irq_mask = s5p_irq_vic_eint_mask,
	193	.irq_unmask = s5p_irq_vic_eint_unmask,
	194	.irq_mask_ack = s5p_irq_vic_eint_maskack,
	195	.irq_ack = s5p_irq_vic_eint_ack,
	196	.irq_set_type = s5p_irq_eint_set_type,
0df04f82	197	#ifdef CONFIG_PM
f5aeffb7	198	.irq_set_wake = s3c_irqext_wake,
0df04f82 JL	199	#endif
	200	};
	201
6d259a25	202	static int __init s5p_init_irq_eint(void)
0df04f82 JL	203	{
	204	int irq;
	205
bffd649d MK	206	if (of_have_populated_dt())
	207	return -ENODEV;
	208
0df04f82	209	for (irq = IRQ_EINT(0); irq <= IRQ_EINT(15); irq++)
6845664a	210	irq_set_chip(irq, &s5p_irq_vic_eint);
0df04f82 JL	211
0df04f82 JL	212	for (irq = IRQ_EINT(16); irq <= IRQ_EINT(31); irq++) {
f38c02f3	213	irq_set_chip_and_handler(irq, &s5p_irq_eint, handle_level_irq);
0df04f82 JL	214	set_irq_flags(irq, IRQF_VALID);
	215	}
	216
6845664a	217	irq_set_chained_handler(IRQ_EINT16_31, s5p_irq_demux_eint16_31);
0df04f82 JL	218	return 0;
	219	}
	220
	221	arch_initcall(s5p_init_irq_eint);