[PATCH 06/14] ARM: S5PC1xx: add gpiolib and external/gpio interrupt support
Marek Szyprowski
m.szyprowski at samsung.com
Tue Nov 17 02:41:16 EST 2009
From: Kyungmin Park <kyungmin.park at samsung.com>
Add support for gpiolib calls. This is based on the gpiolib implementation
from plat-s3c64xx tree.
Add support for external interrupts for GPIO H banks.
Add support for GPIO interrupts for all banks.
Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski at samsung.com>
---
arch/arm/plat-s3c/Kconfig | 6 +
arch/arm/plat-s5pc1xx/Kconfig | 3 +
arch/arm/plat-s5pc1xx/Makefile | 4 +-
arch/arm/plat-s5pc1xx/cpu.c | 5 +
arch/arm/plat-s5pc1xx/gpio-config.c | 62 +++
arch/arm/plat-s5pc1xx/gpiolib.c | 503 ++++++++++++++++++++
.../plat-s5pc1xx/include/plat/gpio-cfg-s5pc1xx.h | 32 ++
arch/arm/plat-s5pc1xx/include/plat/gpio-ext.h | 44 ++
arch/arm/plat-s5pc1xx/include/plat/irqs.h | 15 +-
arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h | 70 +++
arch/arm/plat-s5pc1xx/irq-eint.c | 281 +++++++++++
arch/arm/plat-s5pc1xx/irq-gpio.c | 266 +++++++++++
arch/arm/plat-s5pc1xx/irq.c | 2 +-
13 files changed, 1288 insertions(+), 5 deletions(-)
create mode 100644 arch/arm/plat-s5pc1xx/gpio-config.c
create mode 100644 arch/arm/plat-s5pc1xx/gpiolib.c
create mode 100644 arch/arm/plat-s5pc1xx/include/plat/gpio-cfg-s5pc1xx.h
create mode 100644 arch/arm/plat-s5pc1xx/include/plat/gpio-ext.h
create mode 100644 arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h
create mode 100644 arch/arm/plat-s5pc1xx/irq-eint.c
create mode 100644 arch/arm/plat-s5pc1xx/irq-gpio.c
diff --git a/arch/arm/plat-s3c/Kconfig b/arch/arm/plat-s3c/Kconfig
index 8931c5f..f155a84 100644
--- a/arch/arm/plat-s3c/Kconfig
+++ b/arch/arm/plat-s3c/Kconfig
@@ -159,6 +159,12 @@ config S3C_GPIO_CFG_S3C64XX
Internal configuration to enable S3C64XX style GPIO configuration
functions.
+config S5P_GPIO_CFG_S5PC1XX
+ bool
+ help
+ Internal configuration to enable S5PC1XX style GPIO configuration
+ functions.
+
# DMA
config S3C_DMA
diff --git a/arch/arm/plat-s5pc1xx/Kconfig b/arch/arm/plat-s5pc1xx/Kconfig
index a8a711c..86edd27 100644
--- a/arch/arm/plat-s5pc1xx/Kconfig
+++ b/arch/arm/plat-s5pc1xx/Kconfig
@@ -15,6 +15,9 @@ config PLAT_S5PC1XX
select ARCH_REQUIRE_GPIOLIB
select S3C_GPIO_TRACK
select S3C_GPIO_PULL_UPDOWN
+ select S3C_GPIO_CFG_S3C24XX
+ select S3C_GPIO_CFG_S3C64XX
+ select S5P_GPIO_CFG_S5PC1XX
help
Base platform code for any Samsung S5PC1XX device
diff --git a/arch/arm/plat-s5pc1xx/Makefile b/arch/arm/plat-s5pc1xx/Makefile
index ebbf364..e860813 100644
--- a/arch/arm/plat-s5pc1xx/Makefile
+++ b/arch/arm/plat-s5pc1xx/Makefile
@@ -13,8 +13,9 @@ obj- :=
obj-y += dev-uart.o
obj-y += cpu.o
-obj-y += irq.o
+obj-y += irq.o irq-gpio.o irq-eint.o
obj-y += clock.o
+obj-y += gpiolib.o
# CPU support
@@ -23,5 +24,6 @@ obj-$(CONFIG_CPU_S5PC100_CLOCK) += s5pc100-clock.o
# Device setup
+obj-$(CONFIG_S5P_GPIO_CFG_S5PC1XX) += gpio-config.o
obj-$(CONFIG_S5PC100_SETUP_I2C0) += setup-i2c0.o
obj-$(CONFIG_S5PC100_SETUP_I2C1) += setup-i2c1.o
diff --git a/arch/arm/plat-s5pc1xx/cpu.c b/arch/arm/plat-s5pc1xx/cpu.c
index e8f3472..02baeaa 100644
--- a/arch/arm/plat-s5pc1xx/cpu.c
+++ b/arch/arm/plat-s5pc1xx/cpu.c
@@ -60,6 +60,11 @@ static struct map_desc s5pc1xx_iodesc[] __initdata = {
.length = SZ_4K,
.type = MT_DEVICE,
}, {
+ .virtual = (unsigned long)S5PC1XX_VA_GPIO,
+ .pfn = __phys_to_pfn(S5PC100_PA_GPIO),
+ .length = SZ_4K,
+ .type = MT_DEVICE,
+ }, {
.virtual = (unsigned long)S5PC1XX_VA_CHIPID,
.pfn = __phys_to_pfn(S5PC1XX_PA_CHIPID),
.length = SZ_16,
diff --git a/arch/arm/plat-s5pc1xx/gpio-config.c b/arch/arm/plat-s5pc1xx/gpio-config.c
new file mode 100644
index 0000000..bba675d
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/gpio-config.c
@@ -0,0 +1,62 @@
+/* linux/arch/arm/plat-s5pc1xx/gpio-config.c
+ *
+ * Copyright 2009 Samsung Electronics
+ *
+ * S5PC1XX GPIO Configuration.
+ *
+ * Based on plat-s3c64xx/gpio-config.c
+ *
+ * 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/module.h>
+#include <linux/gpio.h>
+#include <linux/io.h>
+
+#include <mach/gpio-core.h>
+#include <plat/gpio-cfg-s5pc1xx.h>
+
+s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin, unsigned int off)
+{
+ struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+ void __iomem *reg;
+ int shift = off * 2;
+ u32 drvstr;
+
+ if (!chip)
+ return -EINVAL;
+
+ reg = chip->base + 0x0C;
+
+ drvstr = __raw_readl(reg);
+ drvstr = 0xffff & (0x3 << shift);
+ drvstr = drvstr >> shift;
+
+ return (__force s5p_gpio_drvstr_t)drvstr;
+}
+EXPORT_SYMBOL(s5p_gpio_get_drvstr);
+
+int s5p_gpio_set_drvstr(unsigned int pin, unsigned int off,
+ s5p_gpio_drvstr_t drvstr)
+{
+ struct s3c_gpio_chip *chip = s3c_gpiolib_getchip(pin);
+ void __iomem *reg;
+ int shift = off * 2;
+ u32 tmp;
+
+ if (!chip)
+ return -EINVAL;
+
+ reg = chip->base + 0x0C;
+
+ tmp = __raw_readl(reg);
+ tmp |= drvstr << shift;
+
+ __raw_writel(tmp, reg);
+
+ return 0;
+}
+EXPORT_SYMBOL(s5p_gpio_set_drvstr);
diff --git a/arch/arm/plat-s5pc1xx/gpiolib.c b/arch/arm/plat-s5pc1xx/gpiolib.c
new file mode 100644
index 0000000..facb410
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/gpiolib.c
@@ -0,0 +1,503 @@
+/*
+ * arch/arm/plat-s5pc1xx/gpiolib.c
+ *
+ * Copyright 2009 Samsung Electronics Co
+ * Kyungmin Park <kyungmin.park at samsung.com>
+ *
+ * S5PC1XX - GPIOlib 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/irq.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+
+#include <mach/map.h>
+#include <mach/gpio-core.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-cfg-helpers.h>
+#include <plat/regs-gpio.h>
+
+/* S5PC100 GPIO bank summary:
+ *
+ * Bank GPIOs Style INT Type
+ * A0 8 4Bit GPIO_INT0
+ * A1 5 4Bit GPIO_INT1
+ * B 8 4Bit GPIO_INT2
+ * C 5 4Bit GPIO_INT3
+ * D 7 4Bit GPIO_INT4
+ * E0 8 4Bit GPIO_INT5
+ * E1 6 4Bit GPIO_INT6
+ * F0 8 4Bit GPIO_INT7
+ * F1 8 4Bit GPIO_INT8
+ * F2 8 4Bit GPIO_INT9
+ * F3 4 4Bit GPIO_INT10
+ * G0 8 4Bit GPIO_INT11
+ * G1 3 4Bit GPIO_INT12
+ * G2 7 4Bit GPIO_INT13
+ * G3 7 4Bit GPIO_INT14
+ * H0 8 4Bit WKUP_INT
+ * H1 8 4Bit WKUP_INT
+ * H2 8 4Bit WKUP_INT
+ * H3 8 4Bit WKUP_INT
+ * I 8 4Bit GPIO_INT15
+ * J0 8 4Bit GPIO_INT16
+ * J1 5 4Bit GPIO_INT17
+ * J2 8 4Bit GPIO_INT18
+ * J3 8 4Bit GPIO_INT19
+ * J4 4 4Bit GPIO_INT20
+ * K0 8 4Bit None
+ * K1 6 4Bit None
+ * K2 8 4Bit None
+ * K3 8 4Bit None
+ * L0 8 4Bit None
+ * L1 8 4Bit None
+ * L2 8 4Bit None
+ * L3 8 4Bit None
+ */
+
+#define OFF_GPCON (0x00)
+#define OFF_GPDAT (0x04)
+
+#define con_4bit_shift(__off) ((__off) * 4)
+
+#if 1
+#define gpio_dbg(x...) do { } while (0)
+#else
+#define gpio_dbg(x...) printk(KERN_DEBUG x)
+#endif
+
+/* The s5pc1xx_gpiolib routines are to control the gpio banks where
+ * the gpio configuration register (GPxCON) has 4 bits per GPIO, as the
+ * following example:
+ *
+ * base + 0x00: Control register, 4 bits per gpio
+ * gpio n: 4 bits starting at (4*n)
+ * 0000 = input, 0001 = output, others mean special-function
+ * base + 0x04: Data register, 1 bit per gpio
+ * bit n: data bit n
+ *
+ * Note, since the data register is one bit per gpio and is at base + 0x4
+ * we can use s3c_gpiolib_get and s3c_gpiolib_set to change the state of
+ * the output.
+ */
+
+static int s5pc1xx_gpiolib_input(struct gpio_chip *chip, unsigned offset)
+{
+ struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+ void __iomem *base = ourchip->base;
+ unsigned long con;
+
+ con = __raw_readl(base + OFF_GPCON);
+ con &= ~(0xf << con_4bit_shift(offset));
+ __raw_writel(con, base + OFF_GPCON);
+
+ gpio_dbg("%s: %p: CON now %08lx\n", __func__, base, con);
+
+ return 0;
+}
+
+static int s5pc1xx_gpiolib_output(struct gpio_chip *chip,
+ unsigned offset, int value)
+{
+ struct s3c_gpio_chip *ourchip = to_s3c_gpio(chip);
+ void __iomem *base = ourchip->base;
+ unsigned long con;
+ unsigned long dat;
+
+ con = __raw_readl(base + OFF_GPCON);
+ con &= ~(0xf << con_4bit_shift(offset));
+ con |= 0x1 << con_4bit_shift(offset);
+
+ dat = __raw_readl(base + OFF_GPDAT);
+ if (value)
+ dat |= 1 << offset;
+ else
+ dat &= ~(1 << offset);
+
+ __raw_writel(dat, base + OFF_GPDAT);
+ __raw_writel(con, base + OFF_GPCON);
+ __raw_writel(dat, base + OFF_GPDAT);
+
+ gpio_dbg("%s: %p: CON %08lx, DAT %08lx\n", __func__, base, con, dat);
+
+ return 0;
+}
+
+static int s5pc1xx_gpiolib_to_irq(struct gpio_chip *chip, unsigned int offset)
+{
+ return S3C_IRQ_GPIO(chip->base + offset);
+}
+
+static int s5pc1xx_gpiolib_to_eint(struct gpio_chip *chip, unsigned int offset)
+{
+ int base;
+
+ base = chip->base - S5PC100_GPH0(0);
+ if (base == 0)
+ return IRQ_EINT(offset);
+ base = chip->base - S5PC100_GPH1(0);
+ if (base == 0)
+ return IRQ_EINT(8 + offset);
+ base = chip->base - S5PC100_GPH2(0);
+ if (base == 0)
+ return IRQ_EINT(16 + offset);
+ base = chip->base - S5PC100_GPH3(0);
+ if (base == 0)
+ return IRQ_EINT(24 + offset);
+ return -EINVAL;
+}
+
+static struct s3c_gpio_cfg gpio_cfg = {
+ .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
+ .set_pull = s3c_gpio_setpull_updown,
+ .get_pull = s3c_gpio_getpull_updown,
+};
+
+static struct s3c_gpio_cfg gpio_cfg_eint = {
+ .cfg_eint = 0xf,
+ .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
+ .set_pull = s3c_gpio_setpull_updown,
+ .get_pull = s3c_gpio_getpull_updown,
+};
+
+static struct s3c_gpio_cfg gpio_cfg_noint = {
+ .set_config = s3c_gpio_setcfg_s3c64xx_4bit,
+ .set_pull = s3c_gpio_setpull_updown,
+ .get_pull = s3c_gpio_getpull_updown,
+};
+
+static struct s3c_gpio_chip s5pc100_gpio_chips[] = {
+ {
+ .base = S5PC100_GPA0_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPA0(0),
+ .ngpio = S5PC100_GPIO_A0_NR,
+ .label = "GPA0",
+ },
+ }, {
+ .base = S5PC100_GPA1_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPA1(0),
+ .ngpio = S5PC100_GPIO_A1_NR,
+ .label = "GPA1",
+ },
+ }, {
+ .base = S5PC100_GPB_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPB(0),
+ .ngpio = S5PC100_GPIO_B_NR,
+ .label = "GPB",
+ },
+ }, {
+ .base = S5PC100_GPC_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPC(0),
+ .ngpio = S5PC100_GPIO_C_NR,
+ .label = "GPC",
+ },
+ }, {
+ .base = S5PC100_GPD_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPD(0),
+ .ngpio = S5PC100_GPIO_D_NR,
+ .label = "GPD",
+ },
+ }, {
+ .base = S5PC100_GPE0_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPE0(0),
+ .ngpio = S5PC100_GPIO_E0_NR,
+ .label = "GPE0",
+ },
+ }, {
+ .base = S5PC100_GPE1_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPE1(0),
+ .ngpio = S5PC100_GPIO_E1_NR,
+ .label = "GPE1",
+ },
+ }, {
+ .base = S5PC100_GPF0_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPF0(0),
+ .ngpio = S5PC100_GPIO_F0_NR,
+ .label = "GPF0",
+ },
+ }, {
+ .base = S5PC100_GPF1_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPF1(0),
+ .ngpio = S5PC100_GPIO_F1_NR,
+ .label = "GPF1",
+ },
+ }, {
+ .base = S5PC100_GPF2_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPF2(0),
+ .ngpio = S5PC100_GPIO_F2_NR,
+ .label = "GPF2",
+ },
+ }, {
+ .base = S5PC100_GPF3_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPF3(0),
+ .ngpio = S5PC100_GPIO_F3_NR,
+ .label = "GPF3",
+ },
+ }, {
+ .base = S5PC100_GPG0_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPG0(0),
+ .ngpio = S5PC100_GPIO_G0_NR,
+ .label = "GPG0",
+ },
+ }, {
+ .base = S5PC100_GPG1_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPG1(0),
+ .ngpio = S5PC100_GPIO_G1_NR,
+ .label = "GPG1",
+ },
+ }, {
+ .base = S5PC100_GPG2_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPG2(0),
+ .ngpio = S5PC100_GPIO_G2_NR,
+ .label = "GPG2",
+ },
+ }, {
+ .base = S5PC100_GPG3_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPG3(0),
+ .ngpio = S5PC100_GPIO_G3_NR,
+ .label = "GPG3",
+ },
+ }, {
+ .base = S5PC100_GPH0_BASE,
+ .config = &gpio_cfg_eint,
+ .chip = {
+ .base = S5PC100_GPH0(0),
+ .ngpio = S5PC100_GPIO_H0_NR,
+ .label = "GPH0",
+ },
+ }, {
+ .base = S5PC100_GPH1_BASE,
+ .config = &gpio_cfg_eint,
+ .chip = {
+ .base = S5PC100_GPH1(0),
+ .ngpio = S5PC100_GPIO_H1_NR,
+ .label = "GPH1",
+ },
+ }, {
+ .base = S5PC100_GPH2_BASE,
+ .config = &gpio_cfg_eint,
+ .chip = {
+ .base = S5PC100_GPH2(0),
+ .ngpio = S5PC100_GPIO_H2_NR,
+ .label = "GPH2",
+ },
+ }, {
+ .base = S5PC100_GPH3_BASE,
+ .config = &gpio_cfg_eint,
+ .chip = {
+ .base = S5PC100_GPH3(0),
+ .ngpio = S5PC100_GPIO_H3_NR,
+ .label = "GPH3",
+ },
+ }, {
+ .base = S5PC100_GPI_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPI(0),
+ .ngpio = S5PC100_GPIO_I_NR,
+ .label = "GPI",
+ },
+ }, {
+ .base = S5PC100_GPJ0_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPJ0(0),
+ .ngpio = S5PC100_GPIO_J0_NR,
+ .label = "GPJ0",
+ },
+ }, {
+ .base = S5PC100_GPJ1_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPJ1(0),
+ .ngpio = S5PC100_GPIO_J1_NR,
+ .label = "GPJ1",
+ },
+ }, {
+ .base = S5PC100_GPJ2_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPJ2(0),
+ .ngpio = S5PC100_GPIO_J2_NR,
+ .label = "GPJ2",
+ },
+ }, {
+ .base = S5PC100_GPJ3_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPJ3(0),
+ .ngpio = S5PC100_GPIO_J3_NR,
+ .label = "GPJ3",
+ },
+ }, {
+ .base = S5PC100_GPJ4_BASE,
+ .config = &gpio_cfg,
+ .chip = {
+ .base = S5PC100_GPJ4(0),
+ .ngpio = S5PC100_GPIO_J4_NR,
+ .label = "GPJ4",
+ },
+ }, {
+ .base = S5PC100_GPK0_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPK0(0),
+ .ngpio = S5PC100_GPIO_K0_NR,
+ .label = "GPK0",
+ },
+ }, {
+ .base = S5PC100_GPK1_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPK1(0),
+ .ngpio = S5PC100_GPIO_K1_NR,
+ .label = "GPK1",
+ },
+ }, {
+ .base = S5PC100_GPK2_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPK2(0),
+ .ngpio = S5PC100_GPIO_K2_NR,
+ .label = "GPK2",
+ },
+ }, {
+ .base = S5PC100_GPK3_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPK3(0),
+ .ngpio = S5PC100_GPIO_K3_NR,
+ .label = "GPK3",
+ },
+ }, {
+ .base = S5PC100_GPL0_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPL0(0),
+ .ngpio = S5PC100_GPIO_L0_NR,
+ .label = "GPL0",
+ },
+ }, {
+ .base = S5PC100_GPL1_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPL1(0),
+ .ngpio = S5PC100_GPIO_L1_NR,
+ .label = "GPL1",
+ },
+ }, {
+ .base = S5PC100_GPL2_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPL2(0),
+ .ngpio = S5PC100_GPIO_L2_NR,
+ .label = "GPL2",
+ },
+ }, {
+ .base = S5PC100_GPL3_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPL3(0),
+ .ngpio = S5PC100_GPIO_L3_NR,
+ .label = "GPL3",
+ },
+ }, {
+ .base = S5PC100_GPL4_BASE,
+ .config = &gpio_cfg_noint,
+ .chip = {
+ .base = S5PC100_GPL4(0),
+ .ngpio = S5PC100_GPIO_L4_NR,
+ .label = "GPL4",
+ },
+ },
+};
+
+/* FIXME move from irq-gpio.c */
+extern struct irq_chip s5pc1xx_gpioint;
+extern void s5pc1xx_irq_gpioint_handler(unsigned int irq, struct irq_desc *desc);
+
+static __init void s5pc1xx_gpiolib_link(struct s3c_gpio_chip *chip)
+{
+ chip->chip.direction_input = s5pc1xx_gpiolib_input;
+ chip->chip.direction_output = s5pc1xx_gpiolib_output;
+ chip->pm = __gpio_pm(&s3c_gpio_pm_4bit);
+
+ /* Interrupt */
+ if (chip->config == &gpio_cfg) {
+ int i, irq;
+
+ chip->chip.to_irq = s5pc1xx_gpiolib_to_irq;
+
+ for (i = 0; i < chip->chip.ngpio; i++) {
+ irq = S3C_IRQ_GPIO_BASE + chip->chip.base + i;
+ set_irq_chip(irq, &s5pc1xx_gpioint);
+ set_irq_data(irq, &chip->chip);
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+ } else if (chip->config == &gpio_cfg_eint)
+ chip->chip.to_irq = s5pc1xx_gpiolib_to_eint;
+}
+
+static __init void s5pc1xx_gpiolib_add(struct s3c_gpio_chip *chips,
+ int nr_chips,
+ void (*fn)(struct s3c_gpio_chip *))
+{
+ for (; nr_chips > 0; nr_chips--, chips++) {
+ if (fn)
+ (fn)(chips);
+ s3c_gpiolib_add(chips);
+ }
+}
+
+static __init int s5pc1xx_gpiolib_init(void)
+{
+ struct s3c_gpio_chip *chips;
+ int nr_chips;
+
+ chips = s5pc100_gpio_chips;
+ nr_chips = ARRAY_SIZE(s5pc100_gpio_chips);
+
+ s5pc1xx_gpiolib_add(chips, nr_chips, s5pc1xx_gpiolib_link);
+ /* Interrupt */
+ set_irq_chained_handler(IRQ_GPIOINT, s5pc1xx_irq_gpioint_handler);
+
+ return 0;
+}
+core_initcall(s5pc1xx_gpiolib_init);
diff --git a/arch/arm/plat-s5pc1xx/include/plat/gpio-cfg-s5pc1xx.h b/arch/arm/plat-s5pc1xx/include/plat/gpio-cfg-s5pc1xx.h
new file mode 100644
index 0000000..72ad59f
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/include/plat/gpio-cfg-s5pc1xx.h
@@ -0,0 +1,32 @@
+/* linux/arch/arm/plat-s5pc1xx/include/plat/gpio-cfg.h
+ *
+ * Copyright 2009 Samsung Electronic
+ *
+ * S5PC1XX Platform - GPIO pin configuration
+ *
+ * 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.
+*/
+
+/* This file contains the necessary definitions to get the basic gpio
+ * pin configuration done such as setting a pin to input or output or
+ * changing the pull-{up,down} configurations.
+ */
+
+#ifndef __GPIO_CFG_S5PC1XX_H
+#define __GPIO_CFG_S5PC1XX_H __FILE__
+
+typedef unsigned int __bitwise__ s5p_gpio_drvstr_t;
+
+#define S5P_GPIO_DRVSTR_LV1 0x00
+#define S5P_GPIO_DRVSTR_LV2 0x01
+#define S5P_GPIO_DRVSTR_LV3 0x10
+#define S5P_GPIO_DRVSTR_LV4 0x11
+
+extern s5p_gpio_drvstr_t s5p_gpio_get_drvstr(unsigned int pin, unsigned int off);
+
+extern int s5p_gpio_set_drvstr(unsigned int pin, unsigned int off,
+ s5p_gpio_drvstr_t drvstr);
+
+#endif /* __GPIO_CFG_S5PC1XX_H */
diff --git a/arch/arm/plat-s5pc1xx/include/plat/gpio-ext.h b/arch/arm/plat-s5pc1xx/include/plat/gpio-ext.h
new file mode 100644
index 0000000..33ad267
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/include/plat/gpio-ext.h
@@ -0,0 +1,44 @@
+/* linux/arch/arm/plat-s5pc1xx/include/plat/gpio-eint.h
+ *
+ * Copyright 2009 Samsung Electronics Co.
+ *
+ * External Interrupt (GPH0 ~ GPH3) control 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.
+*/
+
+#define S5PC1XX_WKUP_INT_CON0_7 (S5PC1XX_EINT_BASE + 0x0)
+#define S5PC1XX_WKUP_INT_CON8_15 (S5PC1XX_EINT_BASE + 0x4)
+#define S5PC1XX_WKUP_INT_CON16_23 (S5PC1XX_EINT_BASE + 0x8)
+#define S5PC1XX_WKUP_INT_CON24_31 (S5PC1XX_EINT_BASE + 0xC)
+#define S5PC1XX_WKUP_INT_CON(x) (S5PC1XX_WKUP_INT_CON0_7 + (x * 0x4))
+
+#define S5PC1XX_WKUP_INT_FLTCON0_3 (S5PC1XX_EINT_BASE + 0x80)
+#define S5PC1XX_WKUP_INT_FLTCON4_7 (S5PC1XX_EINT_BASE + 0x84)
+#define S5PC1XX_WKUP_INT_FLTCON8_11 (S5PC1XX_EINT_BASE + 0x88)
+#define S5PC1XX_WKUP_INT_FLTCON12_15 (S5PC1XX_EINT_BASE + 0x8C)
+#define S5PC1XX_WKUP_INT_FLTCON16_19 (S5PC1XX_EINT_BASE + 0x90)
+#define S5PC1XX_WKUP_INT_FLTCON20_23 (S5PC1XX_EINT_BASE + 0x94)
+#define S5PC1XX_WKUP_INT_FLTCON24_27 (S5PC1XX_EINT_BASE + 0x98)
+#define S5PC1XX_WKUP_INT_FLTCON28_31 (S5PC1XX_EINT_BASE + 0x9C)
+#define S5PC1XX_WKUP_INT_FLTCON(x) (S5PC1XX_WKUP_INT_FLTCON0_3 + (x * 0x4))
+
+#define S5PC1XX_WKUP_INT_MASK0_7 (S5PC1XX_EINT_BASE + 0x100)
+#define S5PC1XX_WKUP_INT_MASK8_15 (S5PC1XX_EINT_BASE + 0x104)
+#define S5PC1XX_WKUP_INT_MASK16_23 (S5PC1XX_EINT_BASE + 0x108)
+#define S5PC1XX_WKUP_INT_MASK24_31 (S5PC1XX_EINT_BASE + 0x10C)
+#define S5PC1XX_WKUP_INT_MASK(x) (S5PC1XX_WKUP_INT_MASK0_7 + (x * 0x4))
+
+#define S5PC1XX_WKUP_INT_PEND0_7 (S5PC1XX_EINT_BASE + 0x140)
+#define S5PC1XX_WKUP_INT_PEND8_15 (S5PC1XX_EINT_BASE + 0x144)
+#define S5PC1XX_WKUP_INT_PEND16_23 (S5PC1XX_EINT_BASE + 0x148)
+#define S5PC1XX_WKUP_INT_PEND24_31 (S5PC1XX_EINT_BASE + 0x14C)
+#define S5PC1XX_WKUP_INT_PEND(x) (S5PC1XX_WKUP_INT_PEND0_7 + (x * 0x4))
+
+#define S5PC1XX_WKUP_INT_LOWLEV (0x00)
+#define S5PC1XX_WKUP_INT_HILEV (0x01)
+#define S5PC1XX_WKUP_INT_FALLEDGE (0x02)
+#define S5PC1XX_WKUP_INT_RISEEDGE (0x03)
+#define S5PC1XX_WKUP_INT_BOTHEDGE (0x04)
diff --git a/arch/arm/plat-s5pc1xx/include/plat/irqs.h b/arch/arm/plat-s5pc1xx/include/plat/irqs.h
index f07d8c3..ef87363 100644
--- a/arch/arm/plat-s5pc1xx/include/plat/irqs.h
+++ b/arch/arm/plat-s5pc1xx/include/plat/irqs.h
@@ -171,12 +171,21 @@
#define IRQ_SDMIRQ S5PC1XX_IRQ_VIC2(30)
#define IRQ_SDMFIQ S5PC1XX_IRQ_VIC2(31)
+/* External interrupt */
#define S3C_IRQ_EINT_BASE (IRQ_SDMFIQ + 1)
-#define S3C_EINT(x) ((x) + S3C_IRQ_EINT_BASE)
-#define IRQ_EINT(x) S3C_EINT(x)
+#define S3C_EINT(x) (S3C_IRQ_EINT_BASE + (x - 16))
+#define IRQ_EINT(x) (x < 16 ? IRQ_EINT0 + x : S3C_EINT(x))
+#define IRQ_EINT_BIT(x) (x < IRQ_EINT16_31 ? x - IRQ_EINT0 : x - S3C_EINT(0))
-#define NR_IRQS (IRQ_EINT(31)+1)
+/* GPIO interrupt */
+#define S3C_IRQ_GPIO_BASE (IRQ_EINT(31) + 1)
+#define S3C_IRQ_GPIO(x) (S3C_IRQ_GPIO_BASE + (x))
+
+/*
+ * Until MP04 Groups -> 40 (exactly 39) Groups * 8 ~= 320 GPIOs
+ */
+#define NR_IRQS (S3C_IRQ_GPIO(320) + 1)
#endif /* __ASM_PLAT_S5PC1XX_IRQS_H */
diff --git a/arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h b/arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h
new file mode 100644
index 0000000..43c7bc8
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h
@@ -0,0 +1,70 @@
+/* linux/arch/arm/plat-s5pc1xx/include/plat/regs-gpio.h
+ *
+ * Copyright 2009 Samsung Electronics Co.
+ * Byungho Min <bhmin at samsung.com>
+ *
+ * S5PC1XX - GPIO register definitions
+ */
+
+#ifndef __ASM_PLAT_S5PC1XX_REGS_GPIO_H
+#define __ASM_PLAT_S5PC1XX_REGS_GPIO_H __FILE__
+
+#include <mach/map.h>
+
+/* S5PC100 */
+#define S5PC100_GPIO_BASE S5PC1XX_VA_GPIO
+#define S5PC100_GPA0_BASE (S5PC100_GPIO_BASE + 0x0000)
+#define S5PC100_GPA1_BASE (S5PC100_GPIO_BASE + 0x0020)
+#define S5PC100_GPB_BASE (S5PC100_GPIO_BASE + 0x0040)
+#define S5PC100_GPC_BASE (S5PC100_GPIO_BASE + 0x0060)
+#define S5PC100_GPD_BASE (S5PC100_GPIO_BASE + 0x0080)
+#define S5PC100_GPE0_BASE (S5PC100_GPIO_BASE + 0x00A0)
+#define S5PC100_GPE1_BASE (S5PC100_GPIO_BASE + 0x00C0)
+#define S5PC100_GPF0_BASE (S5PC100_GPIO_BASE + 0x00E0)
+#define S5PC100_GPF1_BASE (S5PC100_GPIO_BASE + 0x0100)
+#define S5PC100_GPF2_BASE (S5PC100_GPIO_BASE + 0x0120)
+#define S5PC100_GPF3_BASE (S5PC100_GPIO_BASE + 0x0140)
+#define S5PC100_GPG0_BASE (S5PC100_GPIO_BASE + 0x0160)
+#define S5PC100_GPG1_BASE (S5PC100_GPIO_BASE + 0x0180)
+#define S5PC100_GPG2_BASE (S5PC100_GPIO_BASE + 0x01A0)
+#define S5PC100_GPG3_BASE (S5PC100_GPIO_BASE + 0x01C0)
+#define S5PC100_GPH0_BASE (S5PC100_GPIO_BASE + 0x0C00)
+#define S5PC100_GPH1_BASE (S5PC100_GPIO_BASE + 0x0C20)
+#define S5PC100_GPH2_BASE (S5PC100_GPIO_BASE + 0x0C40)
+#define S5PC100_GPH3_BASE (S5PC100_GPIO_BASE + 0x0C60)
+#define S5PC100_GPI_BASE (S5PC100_GPIO_BASE + 0x01E0)
+#define S5PC100_GPJ0_BASE (S5PC100_GPIO_BASE + 0x0200)
+#define S5PC100_GPJ1_BASE (S5PC100_GPIO_BASE + 0x0220)
+#define S5PC100_GPJ2_BASE (S5PC100_GPIO_BASE + 0x0240)
+#define S5PC100_GPJ3_BASE (S5PC100_GPIO_BASE + 0x0260)
+#define S5PC100_GPJ4_BASE (S5PC100_GPIO_BASE + 0x0280)
+#define S5PC100_GPK0_BASE (S5PC100_GPIO_BASE + 0x02A0)
+#define S5PC100_GPK1_BASE (S5PC100_GPIO_BASE + 0x02C0)
+#define S5PC100_GPK2_BASE (S5PC100_GPIO_BASE + 0x02E0)
+#define S5PC100_GPK3_BASE (S5PC100_GPIO_BASE + 0x0300)
+#define S5PC100_GPL0_BASE (S5PC100_GPIO_BASE + 0x0320)
+#define S5PC100_GPL1_BASE (S5PC100_GPIO_BASE + 0x0340)
+#define S5PC100_GPL2_BASE (S5PC100_GPIO_BASE + 0x0360)
+#define S5PC100_GPL3_BASE (S5PC100_GPIO_BASE + 0x0380)
+#define S5PC100_GPL4_BASE (S5PC100_GPIO_BASE + 0x03A0)
+#define S5PC100_EINT_BASE (S5PC100_GPIO_BASE + 0x0E00)
+
+#define S5PC100_UHOST (S5PC100_GPIO_BASE + 0x0B68)
+#define S5PC100_PDNEN (S5PC100_GPIO_BASE + 0x0F80)
+
+/* PDNEN */
+#define S5PC100_PDNEN_CFG_PDNEN (1 << 1)
+#define S5PC100_PDNEN_CFG_AUTO (0 << 1)
+#define S5PC100_PDNEN_POWERDOWN (1 << 0)
+#define S5PC100_PDNEN_NORMAL (0 << 0)
+
+/* Common part */
+/* External interrupt base is same at both s5pc100 and s5pc110 */
+#define S5PC1XX_EINT_BASE (S5PC100_EINT_BASE)
+
+#define S5PC100_GPx_INPUT(__gpio) (0x0 << ((__gpio) * 4))
+#define S5PC100_GPx_OUTPUT(__gpio) (0x1 << ((__gpio) * 4))
+#define S5PC100_GPx_CONMASK(__gpio) (0xf << ((__gpio) * 4))
+
+#endif /* __ASM_PLAT_S5PC1XX_REGS_GPIO_H */
+
diff --git a/arch/arm/plat-s5pc1xx/irq-eint.c b/arch/arm/plat-s5pc1xx/irq-eint.c
new file mode 100644
index 0000000..373122f
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/irq-eint.c
@@ -0,0 +1,281 @@
+/*
+ * linux/arch/arm/plat-s5pc1xx/irq-eint.c
+ *
+ * Copyright 2009 Samsung Electronics Co.
+ * Byungho Min <bhmin at samsung.com>
+ * Kyungin Park <kyungmin.park at samsung.com>
+ *
+ * Based on plat-s3c64xx/irq-eint.c
+ *
+ * S5PC1XX - Interrupt handling for IRQ_EINT(x)
+ *
+ * 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/pm.h>
+#include <linux/gpio.h>
+
+#include <asm/hardware/vic.h>
+
+#include <mach/map.h>
+
+#include <plat/gpio-cfg.h>
+#include <plat/gpio-ext.h>
+#include <plat/pm.h>
+#include <plat/regs-gpio.h>
+#include <plat/regs-irqtype.h>
+
+/*
+ * bank is a group of external interrupt
+ * bank0 means EINT0 ... EINT7
+ * bank1 means EINT8 ... EINT15
+ * bank2 means EINT16 ... EINT23
+ * bank3 means EINT24 ... EINT31
+ */
+
+static inline int s3c_get_eint(unsigned int irq)
+{
+ int real;
+
+ if (irq < IRQ_EINT16_31)
+ real = (irq - IRQ_EINT0);
+ else
+ real = (irq - S3C_IRQ_EINT_BASE) + IRQ_EINT16_31 - IRQ_EINT0;
+
+ return real;
+}
+
+static inline int s3c_get_bank(unsigned int irq)
+{
+ return s3c_get_eint(irq) >> 3;
+}
+
+static inline int s3c_eint_to_bit(unsigned int irq)
+{
+ int real, bit;
+
+ real = s3c_get_eint(irq);
+ bit = 1 << (real & (8 - 1));
+
+ return bit;
+}
+
+static inline void s3c_irq_eint_mask(unsigned int irq)
+{
+ u32 mask;
+ u32 bank = s3c_get_bank(irq);
+
+ mask = __raw_readl(S5PC1XX_WKUP_INT_MASK(bank));
+ mask |= s3c_eint_to_bit(irq);
+ __raw_writel(mask, S5PC1XX_WKUP_INT_MASK(bank));
+}
+
+static void s3c_irq_eint_unmask(unsigned int irq)
+{
+ u32 mask;
+ u32 bank = s3c_get_bank(irq);
+
+ mask = __raw_readl(S5PC1XX_WKUP_INT_MASK(bank));
+ mask &= ~(s3c_eint_to_bit(irq));
+ __raw_writel(mask, S5PC1XX_WKUP_INT_MASK(bank));
+}
+
+static inline void s3c_irq_eint_ack(unsigned int irq)
+{
+ u32 bank = s3c_get_bank(irq);
+
+ __raw_writel(s3c_eint_to_bit(irq), S5PC1XX_WKUP_INT_PEND(bank));
+}
+
+static void s3c_irq_eint_maskack(unsigned int irq)
+{
+ /* compiler should in-line these */
+ s3c_irq_eint_mask(irq);
+ s3c_irq_eint_ack(irq);
+}
+
+static int s3c_irq_eint_set_type(unsigned int irq, unsigned int type)
+{
+ u32 bank = s3c_get_bank(irq);
+ int real = s3c_get_eint(irq);
+ int gpio, shift, sfn;
+ u32 ctrl, con = 0;
+
+ switch (type) {
+ case IRQ_TYPE_NONE:
+ printk(KERN_WARNING "No edge setting!\n");
+ break;
+
+ case IRQ_TYPE_EDGE_RISING:
+ con = S5PC1XX_WKUP_INT_RISEEDGE;
+ break;
+
+ case IRQ_TYPE_EDGE_FALLING:
+ con = S5PC1XX_WKUP_INT_FALLEDGE;
+ break;
+
+ case IRQ_TYPE_EDGE_BOTH:
+ con = S5PC1XX_WKUP_INT_BOTHEDGE;
+ break;
+
+ case IRQ_TYPE_LEVEL_LOW:
+ con = S5PC1XX_WKUP_INT_LOWLEV;
+ break;
+
+ case IRQ_TYPE_LEVEL_HIGH:
+ con = S5PC1XX_WKUP_INT_HILEV;
+ break;
+
+ default:
+ printk(KERN_ERR "No such irq type %d", type);
+ return -EINVAL;
+ }
+
+ gpio = real & (8 - 1);
+ shift = gpio << 2;
+
+ ctrl = __raw_readl(S5PC1XX_WKUP_INT_CON(bank));
+ ctrl &= ~(0x7 << shift);
+ ctrl |= con << shift;
+ __raw_writel(ctrl, S5PC1XX_WKUP_INT_CON(bank));
+
+ switch (real) {
+ case 0 ... 7:
+ gpio = S5PC100_GPH0(gpio);
+ break;
+ case 8 ... 15:
+ gpio = S5PC100_GPH1(gpio);
+ break;
+ case 16 ... 23:
+ gpio = S5PC100_GPH2(gpio);
+ break;
+ case 24 ... 31:
+ gpio = S5PC100_GPH3(gpio);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ sfn = S3C_GPIO_SFN(0x2);
+ s3c_gpio_cfgpin(gpio, sfn);
+
+ return 0;
+}
+
+static struct irq_chip s3c_irq_eint = {
+ .name = "EINT",
+ .mask = s3c_irq_eint_mask,
+ .unmask = s3c_irq_eint_unmask,
+ .mask_ack = s3c_irq_eint_maskack,
+ .ack = s3c_irq_eint_ack,
+ .set_type = s3c_irq_eint_set_type,
+ .set_wake = s3c_irqext_wake,
+};
+
+/* s3c_irq_demux_eint
+ *
+ * This function demuxes the IRQ from external interrupts,
+ * from IRQ_EINT(16) to IRQ_EINT(31). It is designed to be inlined into
+ * the specific handlers s3c_irq_demux_eintX_Y.
+ */
+static inline void s3c_irq_demux_eint(unsigned int start, unsigned int end)
+{
+ u32 status = __raw_readl(S5PC1XX_WKUP_INT_PEND((start >> 3)));
+ u32 mask = __raw_readl(S5PC1XX_WKUP_INT_MASK((start >> 3)));
+ unsigned int irq;
+
+ status &= ~mask;
+ status &= (1 << (end - start + 1)) - 1;
+
+ for (irq = IRQ_EINT(start); irq <= IRQ_EINT(end); irq++) {
+ if (status & 1)
+ generic_handle_irq(irq);
+
+ status >>= 1;
+ }
+}
+
+static void s3c_irq_demux_eint16_31(unsigned int irq, struct irq_desc *desc)
+{
+ s3c_irq_demux_eint(16, 23);
+ s3c_irq_demux_eint(24, 31);
+}
+
+/*
+ * Handle EINT0 ... EINT15 at VIC directly
+ */
+static void s3c_irq_vic_eint_mask(unsigned int irq)
+{
+ void __iomem *base = get_irq_chip_data(irq);
+ unsigned int real;
+
+ s3c_irq_eint_mask(irq);
+ real = s3c_get_eint(irq);
+ writel(1 << real, base + VIC_INT_ENABLE_CLEAR);
+}
+
+static void s3c_irq_vic_eint_unmask(unsigned int irq)
+{
+ void __iomem *base = get_irq_chip_data(irq);
+ unsigned int real;
+
+ s3c_irq_eint_unmask(irq);
+ real = s3c_get_eint(irq);
+ writel(1 << real, base + VIC_INT_ENABLE);
+}
+
+static inline void s3c_irq_vic_eint_ack(unsigned int irq)
+{
+ u32 bit;
+ u32 bank = s3c_get_bank(irq);
+
+ bit = s3c_eint_to_bit(irq);
+ __raw_writel(bit, S5PC1XX_WKUP_INT_PEND(bank));
+}
+
+static void s3c_irq_vic_eint_maskack(unsigned int irq)
+{
+ /* compiler should in-line these */
+ s3c_irq_vic_eint_mask(irq);
+ s3c_irq_vic_eint_ack(irq);
+}
+
+static struct irq_chip s3c_irq_vic_eint = {
+ .name = "EINT",
+ .mask = s3c_irq_vic_eint_mask,
+ .unmask = s3c_irq_vic_eint_unmask,
+ .mask_ack = s3c_irq_vic_eint_maskack,
+ .ack = s3c_irq_vic_eint_ack,
+ .set_type = s3c_irq_eint_set_type,
+ .set_wake = s3c_irqext_wake,
+};
+
+static int __init s5pc1xx_init_irq_eint(void)
+{
+ int irq;
+
+ for (irq = IRQ_EINT0; irq <= IRQ_EINT15; irq++) {
+ set_irq_chip(irq, &s3c_irq_vic_eint);
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+
+ for (irq = IRQ_EINT(16); irq <= IRQ_EINT(31); irq++) {
+ set_irq_chip(irq, &s3c_irq_eint);
+ set_irq_handler(irq, handle_level_irq);
+ set_irq_flags(irq, IRQF_VALID);
+ }
+
+ set_irq_chained_handler(IRQ_EINT16_31, s3c_irq_demux_eint16_31);
+
+ return 0;
+}
+
+arch_initcall(s5pc1xx_init_irq_eint);
diff --git a/arch/arm/plat-s5pc1xx/irq-gpio.c b/arch/arm/plat-s5pc1xx/irq-gpio.c
new file mode 100644
index 0000000..fecca7a
--- /dev/null
+++ b/arch/arm/plat-s5pc1xx/irq-gpio.c
@@ -0,0 +1,266 @@
+/*
+ * arch/arm/plat-s5pc1xx/irq-gpio.c
+ *
+ * Copyright (C) 2009 Samsung Electronics
+ *
+ * S5PC1XX - Interrupt handling for IRQ_GPIO${group}(x)
+ *
+ * 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/gpio.h>
+
+#include <mach/map.h>
+#include <plat/gpio-cfg.h>
+
+#define S5PC1XX_GPIOREG(x) (S5PC1XX_VA_GPIO + (x))
+
+#define CON_OFFSET 0x700
+#define MASK_OFFSET 0x900
+#define PEND_OFFSET 0xA00
+#define CON_OFFSET_2 0xE00
+#define MASK_OFFSET_2 0xF00
+#define PEND_OFFSET_2 0xF40
+
+#define GPIOINT_LEVEL_LOW 0x0
+#define GPIOINT_LEVEL_HIGH 0x1
+#define GPIOINT_EDGE_FALLING 0x2
+#define GPIOINT_EDGE_RISING 0x3
+#define GPIOINT_EDGE_BOTH 0x4
+
+static int group_to_con_offset(int group)
+{
+ return group << 2;
+}
+
+static int group_to_mask_offset(int group)
+{
+ return group << 2;
+}
+
+static int group_to_pend_offset(int group)
+{
+ return group << 2;
+}
+
+static int s5pc1xx_get_start(unsigned int group)
+{
+ switch (group) {
+ case 0: return S5PC100_GPIO_A0_START;
+ case 1: return S5PC100_GPIO_A1_START;
+ case 2: return S5PC100_GPIO_B_START;
+ case 3: return S5PC100_GPIO_C_START;
+ case 4: return S5PC100_GPIO_D_START;
+ case 5: return S5PC100_GPIO_E0_START;
+ case 6: return S5PC100_GPIO_E1_START;
+ case 7: return S5PC100_GPIO_F0_START;
+ case 8: return S5PC100_GPIO_F1_START;
+ case 9: return S5PC100_GPIO_F2_START;
+ case 10: return S5PC100_GPIO_F3_START;
+ case 11: return S5PC100_GPIO_G0_START;
+ case 12: return S5PC100_GPIO_G1_START;
+ case 13: return S5PC100_GPIO_G2_START;
+ case 14: return S5PC100_GPIO_G3_START;
+ case 15: return S5PC100_GPIO_I_START;
+ case 16: return S5PC100_GPIO_J0_START;
+ case 17: return S5PC100_GPIO_J1_START;
+ case 18: return S5PC100_GPIO_J2_START;
+ case 19: return S5PC100_GPIO_J3_START;
+ case 20: return S5PC100_GPIO_J4_START;
+ default:
+ BUG();
+ }
+
+ return -EINVAL;
+}
+
+static int s5pc1xx_get_group(unsigned int irq)
+{
+ irq -= S3C_IRQ_GPIO(0);
+
+ switch (irq) {
+ case S5PC100_GPIO_A0_START ... S5PC100_GPIO_A1_START - 1:
+ return 0;
+ case S5PC100_GPIO_A1_START ... S5PC100_GPIO_B_START - 1:
+ return 1;
+ case S5PC100_GPIO_B_START ... S5PC100_GPIO_C_START - 1:
+ return 2;
+ case S5PC100_GPIO_C_START ... S5PC100_GPIO_D_START - 1:
+ return 3;
+ case S5PC100_GPIO_D_START ... S5PC100_GPIO_E0_START - 1:
+ return 4;
+ case S5PC100_GPIO_E0_START ... S5PC100_GPIO_E1_START - 1:
+ return 5;
+ case S5PC100_GPIO_E1_START ... S5PC100_GPIO_F0_START - 1:
+ return 6;
+ case S5PC100_GPIO_F0_START ... S5PC100_GPIO_F1_START - 1:
+ return 7;
+ case S5PC100_GPIO_F1_START ... S5PC100_GPIO_F2_START - 1:
+ return 8;
+ case S5PC100_GPIO_F2_START ... S5PC100_GPIO_F3_START - 1:
+ return 9;
+ case S5PC100_GPIO_F3_START ... S5PC100_GPIO_G0_START - 1:
+ return 10;
+ case S5PC100_GPIO_G0_START ... S5PC100_GPIO_G1_START - 1:
+ return 11;
+ case S5PC100_GPIO_G1_START ... S5PC100_GPIO_G2_START - 1:
+ return 12;
+ case S5PC100_GPIO_G2_START ... S5PC100_GPIO_G3_START - 1:
+ return 13;
+ case S5PC100_GPIO_G3_START ... S5PC100_GPIO_H0_START - 1:
+ return 14;
+ case S5PC100_GPIO_I_START ... S5PC100_GPIO_J0_START - 1:
+ return 15;
+ case S5PC100_GPIO_J0_START ... S5PC100_GPIO_J1_START - 1:
+ return 16;
+ case S5PC100_GPIO_J1_START ... S5PC100_GPIO_J2_START - 1:
+ return 17;
+ case S5PC100_GPIO_J2_START ... S5PC100_GPIO_J3_START - 1:
+ return 18;
+ case S5PC100_GPIO_J3_START ... S5PC100_GPIO_J4_START - 1:
+ return 19;
+ case S5PC100_GPIO_J4_START ... S5PC100_GPIO_K0_START - 1:
+ return 20;
+ default:
+ BUG();
+ }
+
+ return -EINVAL;
+}
+
+static int s5pc1xx_get_offset(unsigned int irq)
+{
+ struct gpio_chip *chip = get_irq_data(irq);
+ return irq - S3C_IRQ_GPIO(chip->base);
+}
+
+static void s5pc1xx_gpioint_ack(unsigned int irq)
+{
+ int group, offset, pend_offset;
+ unsigned int value;
+
+ group = s5pc1xx_get_group(irq);
+ offset = s5pc1xx_get_offset(irq);
+ pend_offset = group_to_pend_offset(group);
+
+ value = __raw_readl(S5PC1XX_GPIOREG(PEND_OFFSET) + pend_offset);
+ value |= 1 << offset;
+ __raw_writel(value, S5PC1XX_GPIOREG(PEND_OFFSET) + pend_offset);
+}
+
+static void s5pc1xx_gpioint_mask(unsigned int irq)
+{
+ int group, offset, mask_offset;
+ unsigned int value;
+
+ group = s5pc1xx_get_group(irq);
+ offset = s5pc1xx_get_offset(irq);
+ mask_offset = group_to_mask_offset(group);
+
+ value = __raw_readl(S5PC1XX_GPIOREG(MASK_OFFSET) + mask_offset);
+ value |= 1 << offset;
+ __raw_writel(value, S5PC1XX_GPIOREG(MASK_OFFSET) + mask_offset);
+}
+
+static void s5pc1xx_gpioint_unmask(unsigned int irq)
+{
+ int group, offset, mask_offset;
+ unsigned int value;
+
+ group = s5pc1xx_get_group(irq);
+ offset = s5pc1xx_get_offset(irq);
+ mask_offset = group_to_mask_offset(group);
+
+ value = __raw_readl(S5PC1XX_GPIOREG(MASK_OFFSET) + mask_offset);
+ value &= ~(1 << offset);
+ __raw_writel(value, S5PC1XX_GPIOREG(MASK_OFFSET) + mask_offset);
+}
+
+static void s5pc1xx_gpioint_mask_ack(unsigned int irq)
+{
+ s5pc1xx_gpioint_mask(irq);
+ s5pc1xx_gpioint_ack(irq);
+}
+
+static int s5pc1xx_gpioint_set_type(unsigned int irq, unsigned int type)
+{
+ int group, offset, con_offset;
+ unsigned int value;
+
+ group = s5pc1xx_get_group(irq);
+ offset = s5pc1xx_get_offset(irq);
+ con_offset = group_to_con_offset(group);
+
+ switch (type) {
+ case IRQ_TYPE_NONE:
+ printk(KERN_WARNING "No irq type\n");
+ return -EINVAL;
+ case IRQ_TYPE_EDGE_RISING:
+ type = GPIOINT_EDGE_RISING;
+ break;
+ case IRQ_TYPE_EDGE_FALLING:
+ type = GPIOINT_EDGE_FALLING;
+ break;
+ case IRQ_TYPE_EDGE_BOTH:
+ type = GPIOINT_EDGE_BOTH;
+ break;
+ case IRQ_TYPE_LEVEL_HIGH:
+ type = GPIOINT_LEVEL_HIGH;
+ break;
+ case IRQ_TYPE_LEVEL_LOW:
+ type = GPIOINT_LEVEL_LOW;
+ break;
+ default:
+ BUG();
+ }
+
+
+ value = __raw_readl(S5PC1XX_GPIOREG(CON_OFFSET) + con_offset);
+ value &= ~(0xf << (offset * 0x4));
+ value |= (type << (offset * 0x4));
+ __raw_writel(value, S5PC1XX_GPIOREG(CON_OFFSET) + con_offset);
+
+ return 0;
+}
+
+struct irq_chip s5pc1xx_gpioint = {
+ .name = "GPIO",
+ .ack = s5pc1xx_gpioint_ack,
+ .mask = s5pc1xx_gpioint_mask,
+ .mask_ack = s5pc1xx_gpioint_mask_ack,
+ .unmask = s5pc1xx_gpioint_unmask,
+ .set_type = s5pc1xx_gpioint_set_type,
+};
+
+void s5pc1xx_irq_gpioint_handler(unsigned int irq, struct irq_desc *desc)
+{
+ int group, offset, pend_offset, mask_offset;
+ int real_irq, group_end;
+ unsigned int pend, mask;
+
+ group_end = 21;
+
+ for (group = 0; group < group_end; group++) {
+ pend_offset = group_to_pend_offset(group);
+ pend = __raw_readl(S5PC1XX_GPIOREG(PEND_OFFSET) + pend_offset);
+ if (!pend)
+ continue;
+
+ mask_offset = group_to_mask_offset(group);
+ mask = __raw_readl(S5PC1XX_GPIOREG(MASK_OFFSET) + mask_offset);
+ pend &= ~mask;
+
+ for (offset = 0; offset < 8; offset++) {
+ if (pend & (1 << offset)) {
+ real_irq = s5pc1xx_get_start(group) + offset;
+ generic_handle_irq(S3C_IRQ_GPIO(real_irq));
+ }
+ }
+ }
+}
diff --git a/arch/arm/plat-s5pc1xx/irq.c b/arch/arm/plat-s5pc1xx/irq.c
index 80d6dd9..e44fd04 100644
--- a/arch/arm/plat-s5pc1xx/irq.c
+++ b/arch/arm/plat-s5pc1xx/irq.c
@@ -79,7 +79,7 @@ static void s3c_irq_timer_ack(unsigned int irq)
{
u32 reg = __raw_readl(S3C64XX_TINT_CSTAT);
- reg &= 0x1f;
+ reg &= 0x1f; /* mask out pending interrupts */
reg |= (1 << 5) << (irq - IRQ_TIMER0);
__raw_writel(reg, S3C64XX_TINT_CSTAT);
}
--
1.6.4
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