[PATCH v4] ARM: S5PV210: Add Ext interrupt support.
Kukjin Kim
kgene.kim at samsung.com
Fri May 14 04:36:00 EDT 2010
From: Jongpill Lee <boyko.lee at samsung.com>
Add support for external interrupts on v210.
Signed-off-by: Jongpill Lee <boyko.lee at samsung.com>
Signed-off-by: Pannaga Bhushan <p.bhushan at samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim at samsung.com>
---
arch/arm/mach-s5pv210/Kconfig | 1 +
arch/arm/mach-s5pv210/include/mach/irqs.h | 26 +--
arch/arm/mach-s5pv210/include/mach/regs-gpio.h | 46 +++++
arch/arm/plat-s5p/Kconfig | 5 +
arch/arm/plat-s5p/Makefile | 1 +
arch/arm/plat-s5p/irq-eint.c | 216 ++++++++++++++++++++++++
6 files changed, 277 insertions(+), 18 deletions(-)
create mode 100644 arch/arm/mach-s5pv210/include/mach/regs-gpio.h
create mode 100644 arch/arm/plat-s5p/irq-eint.c
diff --git a/arch/arm/mach-s5pv210/Kconfig b/arch/arm/mach-s5pv210/Kconfig
index af33a1a..c4c2a7f 100644
--- a/arch/arm/mach-s5pv210/Kconfig
+++ b/arch/arm/mach-s5pv210/Kconfig
@@ -12,6 +12,7 @@ if ARCH_S5PV210
config CPU_S5PV210
bool
select PLAT_S5P
+ select S5P_EXT_INT
help
Enable S5PV210 CPU support
diff --git a/arch/arm/mach-s5pv210/include/mach/irqs.h b/arch/arm/mach-s5pv210/include/mach/irqs.h
index 62c5175..823789c 100644
--- a/arch/arm/mach-s5pv210/include/mach/irqs.h
+++ b/arch/arm/mach-s5pv210/include/mach/irqs.h
@@ -17,22 +17,9 @@
/* 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)
+/* Can be used for EINTs 0 to 15 */
+#define IRQ_EINT(x) ((x) + S5P_IRQ_VIC0(0))
+
#define IRQ_EINT16_31 S5P_IRQ_VIC0(16)
#define IRQ_BATF S5P_IRQ_VIC0(17)
#define IRQ_MDMA S5P_IRQ_VIC0(18)
@@ -137,10 +124,13 @@
#define S5P_IRQ_EINT_BASE (IRQ_VIC_END + 1)
#define S5P_EINT(x) ((x) + S5P_IRQ_EINT_BASE)
-#define IRQ_EINT(x) S5P_EINT(x)
+/* Can be used for EINTs 16 to 31 */
+#define IRQ_EINT_GRP(x) S5P_EINT(x)
+
+#define EINT_MODE S3C_GPIO_SFN(0xf)
/* Set the default NR_IRQS */
-#define NR_IRQS (IRQ_EINT(31) + 1)
+#define NR_IRQS (IRQ_EINT_GRP(31) + 1)
#endif /* ASM_ARCH_IRQS_H */
diff --git a/arch/arm/mach-s5pv210/include/mach/regs-gpio.h b/arch/arm/mach-s5pv210/include/mach/regs-gpio.h
new file mode 100644
index 0000000..fe16292
--- /dev/null
+++ b/arch/arm/mach-s5pv210/include/mach/regs-gpio.h
@@ -0,0 +1,46 @@
+/* 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_IRQ_EINT_BASE))
+
+#define eint_irq_to_bit(irq) (1 << (eint_offset(irq) & 0x7))
+
+#define eint_conf_reg(irq) ((eint_offset(irq)) >> 3)
+#define eint_mask_reg(irq) ((eint_offset(irq)) >> 3)
+#define eint_pend_reg(irq) ((eint_offset(irq)) >> 3)
+
+/* 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 */
diff --git a/arch/arm/plat-s5p/Kconfig b/arch/arm/plat-s5p/Kconfig
index d400a6a..7d1fc40 100644
--- a/arch/arm/plat-s5p/Kconfig
+++ b/arch/arm/plat-s5p/Kconfig
@@ -23,3 +23,8 @@ 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.)
diff --git a/arch/arm/plat-s5p/Makefile b/arch/arm/plat-s5p/Makefile
index a7c54b3..25941a5 100644
--- a/arch/arm/plat-s5p/Makefile
+++ b/arch/arm/plat-s5p/Makefile
@@ -16,4 +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
diff --git a/arch/arm/plat-s5p/irq-eint.c b/arch/arm/plat-s5p/irq-eint.c
new file mode 100644
index 0000000..040e271
--- /dev/null
+++ b/arch/arm/plat-s5p/irq-eint.c
@@ -0,0 +1,216 @@
+/* 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/bitops.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_mask_reg(irq)));
+ mask |= eint_irq_to_bit(irq);
+ __raw_writel(mask, S5P_EINT_MASK(eint_mask_reg(irq)));
+}
+
+static void s5p_irq_eint_unmask(unsigned int irq)
+{
+ u32 mask;
+
+ mask = __raw_readl(S5P_EINT_MASK(eint_mask_reg(irq)));
+ mask &= ~(eint_irq_to_bit(irq));
+ __raw_writel(mask, S5P_EINT_MASK(eint_mask_reg(irq)));
+}
+
+static inline void s5p_irq_eint_ack(unsigned int irq)
+{
+ __raw_writel(eint_irq_to_bit(irq), S5P_EINT_PEND(eint_pend_reg(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_NONE:
+ printk(KERN_WARNING "No edge setting!\n");
+ break;
+
+ 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_conf_reg(irq)));
+ ctrl &= ~mask;
+ ctrl |= newvalue << shift;
+ __raw_writel(ctrl, S5P_EINT_CON(eint_conf_reg(irq)));
+
+ if ((0 <= offs) && (offs < 8))
+ s3c_gpio_cfgpin(S5PV210_GPH0(offs & 0x7), EINT_MODE);
+
+ else if ((8 <= offs) && (offs < 16))
+ s3c_gpio_cfgpin(S5PV210_GPH1(offs & 0x7), EINT_MODE);
+
+ else if ((16 <= offs) && (offs < 24))
+ s3c_gpio_cfgpin(S5PV210_GPH2(offs & 0x7), EINT_MODE);
+
+ else if ((24 <= offs) && (offs < 32))
+ s3c_gpio_cfgpin(S5PV210_GPH3(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 IRQ_EINT(16) to IRQ_EINT(31). It is designed to be inlined into
+ * the specific handlers s5p_irq_demux_eintX_Y.
+ */
+static inline void s5p_irq_demux_eint(unsigned int start, unsigned int end)
+{
+ u32 status;
+ u32 mask = __raw_readl(S5P_EINT_MASK((start >> 3)));
+ unsigned int irq;
+
+ status = __raw_readl(S5P_EINT_PEND((start >> 3)));
+ status &= ~mask;
+ status &= (1 << (end - start + 1)) - 1;
+
+ while (status) {
+ irq = fls(status);
+ generic_handle_irq(irq - 1 + IRQ_EINT(start));
+ status &= ~(1 << irq);
+ }
+}
+
+static void s5p_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
+{
+ s5p_irq_demux_eint(16, 23);
+ s5p_irq_demux_eint(24, 31);
+}
+
+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_pend_reg(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_GRP(16); irq <= IRQ_EINT_GRP(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);
--
1.6.2.5
More information about the linux-arm-kernel
mailing list