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ARM: S5PV210: Add IRQ_EINT interrupt support. 

Add support for external interrupts on S5PV210.

Signed-off-by: Jongpill Lee <boyko.lee@samsung.com>
Signed-off-by: Pannaga Bhushan <p.bhushan@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
[ben-linux@fluff.org: Ext => IRQ_EINT in title]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
This commit is contained in:
Jongpill Lee 2010-05-17 16:56:26 +09:00 committed by Ben Dooks
parent 504d36e91a
commit 0df04f820b
6 changed files with 276 additions and 20 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/arm/mach-s5pv210/Kconfig
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@ -13,6 +13,7 @@ config CPU_S5PV210
bool
select PLAT_S5P
select S3C_PL330_DMA
select S5P_EXT_INT
help
Enable S5PV210 CPU support

31
arch/arm/mach-s5pv210/include/mach/irqs.h
View File

@ -17,22 +17,6 @@
/* VIC0: System, DMA, Timer */
#define IRQ_EINT0 S5P_IRQ_VIC0(0)
#define IRQ_EINT1 S5P_IRQ_VIC0(1)
#define IRQ_EINT2 S5P_IRQ_VIC0(2)
#define IRQ_EINT3 S5P_IRQ_VIC0(3)
#define IRQ_EINT4 S5P_IRQ_VIC0(4)
#define IRQ_EINT5 S5P_IRQ_VIC0(5)
#define IRQ_EINT6 S5P_IRQ_VIC0(6)
#define IRQ_EINT7 S5P_IRQ_VIC0(7)
#define IRQ_EINT8 S5P_IRQ_VIC0(8)
#define IRQ_EINT9 S5P_IRQ_VIC0(9)
#define IRQ_EINT10 S5P_IRQ_VIC0(10)
#define IRQ_EINT11 S5P_IRQ_VIC0(11)
#define IRQ_EINT12 S5P_IRQ_VIC0(12)
#define IRQ_EINT13 S5P_IRQ_VIC0(13)
#define IRQ_EINT14 S5P_IRQ_VIC0(14)
#define IRQ_EINT15 S5P_IRQ_VIC0(15)
#define IRQ_EINT16_31 S5P_IRQ_VIC0(16)
#define IRQ_BATF S5P_IRQ_VIC0(17)
#define IRQ_MDMA S5P_IRQ_VIC0(18)
@ -134,13 +118,20 @@
#define IRQ_MDNIE3 S5P_IRQ_VIC3(8)
#define IRQ_VIC_END S5P_IRQ_VIC3(31)
#define S5P_IRQ_EINT_BASE (IRQ_VIC_END + 1)
#define S5P_EINT_16_31_BASE (IRQ_VIC_END + 1)
#define S5P_EINT(x) ((x) + S5P_IRQ_EINT_BASE)
#define IRQ_EINT(x) S5P_EINT(x)
#define EINT_MODE S3C_GPIO_SFN(0xf)
#define IRQ_EINT(x) ((x) < 16 ? ((x) + S5P_IRQ_VIC0(0)) \
: ((x) + S5P_EINT_16_31_BASE))
/* Set the default NR_IRQS */
#define NR_IRQS (IRQ_EINT(31) + 1)
#define NR_IRQS (IRQ_EINT(31) + 1)
#define EINT_GPIO_0(x) S5PV210_GPH0(x)
#define EINT_GPIO_1(x) S5PV210_GPH1(x)
#define EINT_GPIO_2(x) S5PV210_GPH2(x)
#define EINT_GPIO_3(x) S5PV210_GPH3(x)
#endif /* ASM_ARCH_IRQS_H */

44
arch/arm/mach-s5pv210/include/mach/regs-gpio.h Normal file
View File

@ -0,0 +1,44 @@
/* linux/arch/arm/mach-s5pv210/include/mach/regs-gpio.h
*
* Copyright (c) 2010 Samsung Electronics Co., Ltd.
* http://www.samsung.com
*
* S5PV210 - GPIO (including EINT) 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_GPIO_H
#define __ASM_ARCH_REGS_GPIO_H __FILE__
#include <mach/map.h>
#define S5PV210_EINT30CON (S5P_VA_GPIO + 0xE00)
#define S5P_EINT_CON(x) (S5PV210_EINT30CON + ((x) * 0x4))
#define S5PV210_EINT30FLTCON0 (S5P_VA_GPIO + 0xE80)
#define S5P_EINT_FLTCON(x) (S5PV210_EINT30FLTCON0 + ((x) * 0x4))
#define S5PV210_EINT30MASK (S5P_VA_GPIO + 0xF00)
#define S5P_EINT_MASK(x) (S5PV210_EINT30MASK + ((x) * 0x4))
#define S5PV210_EINT30PEND (S5P_VA_GPIO + 0xF40)
#define S5P_EINT_PEND(x) (S5PV210_EINT30PEND + ((x) * 0x4))
#define eint_offset(irq) ((irq) < IRQ_EINT16_31 ? ((irq) - IRQ_EINT(0)) \
: ((irq) - S5P_EINT_16_31_BASE))
#define EINT_REG_NR(x) (eint_offset(x) >> 3)
#define eint_irq_to_bit(irq) (1 << (eint_offset(irq) & 0x7))
/* values for S5P_EXTINT0 */
#define S5P_EXTINT_LOWLEV (0x00)
#define S5P_EXTINT_HILEV (0x01)
#define S5P_EXTINT_FALLEDGE (0x02)
#define S5P_EXTINT_RISEEDGE (0x03)
#define S5P_EXTINT_BOTHEDGE (0x04)
#endif /* __ASM_ARCH_REGS_GPIO_H */

5
arch/arm/plat-s5p/Kconfig
View File

@ -24,3 +24,8 @@ config PLAT_S5P
select SAMSUNG_IRQ_UART
help
Base platform code for Samsung's S5P series SoC.
config S5P_EXT_INT
bool
help
Use the external interrupts (other than GPIO interrupts.)

2
arch/arm/plat-s5p/Makefile
View File

@ -16,3 +16,5 @@ obj-y += dev-uart.o
obj-y += cpu.o
obj-y += clock.o
obj-y += irq.o
obj-$(CONFIG_S5P_EXT_INT) += irq-eint.o
obj-y += setup-i2c0.o

213
arch/arm/plat-s5p/irq-eint.c Normal file
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@ -0,0 +1,213 @@
/* linux/arch/arm/plat-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/sysdev.h>
#include <linux/gpio.h>
#include <asm/hardware/vic.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(unsigned int irq)
{
u32 mask;
mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(irq)));
mask |= eint_irq_to_bit(irq);
__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(irq)));
}
static void s5p_irq_eint_unmask(unsigned int irq)
{
u32 mask;
mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(irq)));
mask &= ~(eint_irq_to_bit(irq));
__raw_writel(mask, S5P_EINT_MASK(EINT_REG_NR(irq)));
}
static inline void s5p_irq_eint_ack(unsigned int irq)
{
__raw_writel(eint_irq_to_bit(irq), S5P_EINT_PEND(EINT_REG_NR(irq)));
}
static void s5p_irq_eint_maskack(unsigned int irq)
{
/* compiler should in-line these */
s5p_irq_eint_mask(irq);
s5p_irq_eint_ack(irq);
}
static int s5p_irq_eint_set_type(unsigned int irq, unsigned int type)
{
int offs = eint_offset(irq);
int shift;
u32 ctrl, mask;
u32 newvalue = 0;
switch (type) {
case IRQ_TYPE_EDGE_RISING:
newvalue = S5P_EXTINT_RISEEDGE;
break;
case IRQ_TYPE_EDGE_FALLING:
newvalue = S5P_EXTINT_RISEEDGE;
break;
case IRQ_TYPE_EDGE_BOTH:
newvalue = S5P_EXTINT_BOTHEDGE;
break;
case IRQ_TYPE_LEVEL_LOW:
newvalue = S5P_EXTINT_LOWLEV;
break;
case IRQ_TYPE_LEVEL_HIGH:
newvalue = S5P_EXTINT_HILEV;
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(irq)));
ctrl &= ~mask;
ctrl |= newvalue << shift;
__raw_writel(ctrl, S5P_EINT_CON(EINT_REG_NR(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",
.mask = s5p_irq_eint_mask,
.unmask = s5p_irq_eint_unmask,
.mask_ack = s5p_irq_eint_maskack,
.ack = s5p_irq_eint_ack,
.set_type = s5p_irq_eint_set_type,
#ifdef CONFIG_PM
.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;
u32 mask = __raw_readl(S5P_EINT_MASK(EINT_REG_NR(start)));
unsigned int irq;
status = __raw_readl(S5P_EINT_PEND(EINT_REG_NR(start)));
status &= ~mask;
status &= 0xff;
while (status) {
irq = fls(status);
generic_handle_irq(irq - 1 + 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(unsigned int irq)
{
s5p_irq_eint_mask(irq);
}
static void s5p_irq_vic_eint_unmask(unsigned int irq)
{
s5p_irq_eint_unmask(irq);
}
static inline void s5p_irq_vic_eint_ack(unsigned int irq)
{
__raw_writel(eint_irq_to_bit(irq), S5P_EINT_PEND(EINT_REG_NR(irq)));
}
static void s5p_irq_vic_eint_maskack(unsigned int irq)
{
s5p_irq_vic_eint_mask(irq);
s5p_irq_vic_eint_ack(irq);
}
static struct irq_chip s5p_irq_vic_eint = {
.name = "s5p_vic_eint",
.mask = s5p_irq_vic_eint_mask,
.unmask = s5p_irq_vic_eint_unmask,
.mask_ack = s5p_irq_vic_eint_maskack,
.ack = s5p_irq_vic_eint_ack,
.set_type = s5p_irq_eint_set_type,
#ifdef CONFIG_PM
.set_wake = s3c_irqext_wake,
#endif
};
int __init s5p_init_irq_eint(void)
{
int irq;
for (irq = IRQ_EINT(0); irq <= IRQ_EINT(15); irq++)
set_irq_chip(irq, &s5p_irq_vic_eint);
for (irq = IRQ_EINT(16); irq <= IRQ_EINT(31); irq++) {
set_irq_chip(irq, &s5p_irq_eint);
set_irq_handler(irq, handle_level_irq);
set_irq_flags(irq, IRQF_VALID);
}
set_irq_chained_handler(IRQ_EINT16_31, s5p_irq_demux_eint16_31);
return 0;
}
arch_initcall(s5p_init_irq_eint);