ARM: S5PC1xx: add gpiolib and external/gpio interrupt support

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@samsung.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

4 files changed, 158 insertions, 3 deletions

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 00000000000..72ad59f61ef
--- /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 00000000000..33ad267e847
--- /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 f07d8c3b25d..ef8736366f0 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 00000000000..43c7bc8bf78
--- /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@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 */
+