unicore32 core architecture: interrupts ang gpio handling

This patch implements interrupts and gpio handling.
UniCore32 has 9 gpio interrupt sources.
And gpio device operations are also here.

Signed-off-by: Guan Xuetao <gxt@mprc.pku.edu.cn>

3 files changed, 263 insertions, 0 deletions

diff --git a/arch/unicore32/include/asm/gpio.h b/arch/unicore32/include/asm/gpio.h
new file mode 100644
index 000000000000..3aaa41e9e413
--- /dev/null
+++ b/arch/unicore32/include/asm/gpio.h
@@ -0,0 +1,103 @@
+/*
+ * linux/arch/unicore32/include/asm/gpio.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * 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 __UNICORE_GPIO_H__
+#define __UNICORE_GPIO_H__
+
+#include <asm/irq.h>
+#include <mach/hardware.h>
+#include <asm-generic/gpio.h>
+
+#define GPI_OTP_INT             0
+#define GPI_PCI_INTA            1
+#define GPI_PCI_INTB            2
+#define GPI_PCI_INTC            3
+#define GPI_PCI_INTD            4
+#define GPI_BAT_DET             5
+#define GPI_SD_CD               6
+#define GPI_SOFF_REQ            7
+#define GPI_SD_WP               8
+#define GPI_LCD_CASE_OFF        9
+#define GPO_WIFI_EN             10
+#define GPO_HDD_LED             11
+#define GPO_VGA_EN              12
+#define GPO_LCD_EN              13
+#define GPO_LED_DATA            14
+#define GPO_LED_CLK             15
+#define GPO_CAM_PWR_EN          16
+#define GPO_LCD_VCC_EN          17
+#define GPO_SOFT_OFF            18
+#define GPO_BT_EN               19
+#define GPO_FAN_ON              20
+#define GPO_SPKR                21
+#define GPO_SET_V1              23
+#define GPO_SET_V2              24
+#define GPO_CPU_HEALTH          25
+#define GPO_LAN_SEL             26
+
+#ifdef CONFIG_PUV3_NB0916
+#define GPI_BTN_TOUCH           14
+#define GPIO_IN                 0x000043ff /* 1 for input */
+#define GPIO_OUT                0x0fffbc00 /* 1 for output */
+#endif  /* CONFIG_PUV3_NB0916 */
+
+#ifdef CONFIG_PUV3_SMW0919
+#define GPIO_IN                 0x000003ff /* 1 for input */
+#define GPIO_OUT                0x0ffffc00 /* 1 for output */
+#endif  /* CONFIG_PUV3_SMW0919 */
+
+#ifdef CONFIG_PUV3_DB0913
+#define GPIO_IN                 0x000001df /* 1 for input */
+#define GPIO_OUT                0x03fee800 /* 1 for output */
+#endif  /* CONFIG_PUV3_DB0913 */
+
+#define GPIO_DIR                (~((GPIO_IN) | 0xf0000000))
+                                /* 0 input, 1 output */
+
+static inline int gpio_get_value(unsigned gpio)
+{
+        if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
+                return GPIO_GPLR & GPIO_GPIO(gpio);
+        else
+                return __gpio_get_value(gpio);
+}
+
+static inline void gpio_set_value(unsigned gpio, int value)
+{
+        if (__builtin_constant_p(gpio) && (gpio <= GPIO_MAX))
+                if (value)
+                        GPIO_GPSR = GPIO_GPIO(gpio);
+                else
+                        GPIO_GPCR = GPIO_GPIO(gpio);
+        else
+                __gpio_set_value(gpio, value);
+}
+
+#define gpio_cansleep   __gpio_cansleep
+
+static inline unsigned gpio_to_irq(unsigned gpio)
+{
+        if ((gpio < IRQ_GPIOHIGH) && (FIELD(1, 1, gpio) & GPIO_GPIR))
+                return IRQ_GPIOLOW0 + gpio;
+        else
+                return IRQ_GPIO0 + gpio;
+}
+
+static inline unsigned irq_to_gpio(unsigned irq)
+{
+        if (irq < IRQ_GPIOHIGH)
+                return irq - IRQ_GPIOLOW0;
+        else
+                return irq - IRQ_GPIO0;
+}
+
+#endif /* __UNICORE_GPIO_H__ */
diff --git a/arch/unicore32/include/asm/irq.h b/arch/unicore32/include/asm/irq.h
new file mode 100644
index 000000000000..ade8bb87111d
--- /dev/null
+++ b/arch/unicore32/include/asm/irq.h
@@ -0,0 +1,107 @@
+/*
+ * linux/arch/unicore32/include/asm/irq.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * 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 __UNICORE_IRQ_H__
+#define __UNICORE_IRQ_H__
+
+#include <asm-generic/irq.h>
+
+#define IRQ_GPIOLOW0            0x00
+#define IRQ_GPIOLOW1            0x01
+#define IRQ_GPIOLOW2            0x02
+#define IRQ_GPIOLOW3            0x03
+#define IRQ_GPIOLOW4            0x04
+#define IRQ_GPIOLOW5            0x05
+#define IRQ_GPIOLOW6            0x06
+#define IRQ_GPIOLOW7            0x07
+#define IRQ_GPIOHIGH            0x08
+#define IRQ_USB                 0x09
+#define IRQ_SDC                 0x0a
+#define IRQ_AC97                0x0b
+#define IRQ_SATA                0x0c
+#define IRQ_MME                 0x0d
+#define IRQ_PCI_BRIDGE          0x0e
+#define IRQ_DDR                 0x0f
+#define IRQ_SPI                 0x10
+#define IRQ_UNIGFX              0x11
+#define IRQ_I2C                 0x11
+#define IRQ_UART1               0x12
+#define IRQ_UART0               0x13
+#define IRQ_UMAL                0x14
+#define IRQ_NAND                0x15
+#define IRQ_PS2_KBD             0x16
+#define IRQ_PS2_AUX             0x17
+#define IRQ_DMA                 0x18
+#define IRQ_DMAERR              0x19
+#define IRQ_TIMER0              0x1a
+#define IRQ_TIMER1              0x1b
+#define IRQ_TIMER2              0x1c
+#define IRQ_TIMER3              0x1d
+#define IRQ_RTC                 0x1e
+#define IRQ_RTCAlarm            0x1f
+
+#define IRQ_GPIO0               0x20
+#define IRQ_GPIO1               0x21
+#define IRQ_GPIO2               0x22
+#define IRQ_GPIO3               0x23
+#define IRQ_GPIO4               0x24
+#define IRQ_GPIO5               0x25
+#define IRQ_GPIO6               0x26
+#define IRQ_GPIO7               0x27
+#define IRQ_GPIO8               0x28
+#define IRQ_GPIO9               0x29
+#define IRQ_GPIO10              0x2a
+#define IRQ_GPIO11              0x2b
+#define IRQ_GPIO12              0x2c
+#define IRQ_GPIO13              0x2d
+#define IRQ_GPIO14              0x2e
+#define IRQ_GPIO15              0x2f
+#define IRQ_GPIO16              0x30
+#define IRQ_GPIO17              0x31
+#define IRQ_GPIO18              0x32
+#define IRQ_GPIO19              0x33
+#define IRQ_GPIO20              0x34
+#define IRQ_GPIO21              0x35
+#define IRQ_GPIO22              0x36
+#define IRQ_GPIO23              0x37
+#define IRQ_GPIO24              0x38
+#define IRQ_GPIO25              0x39
+#define IRQ_GPIO26              0x3a
+#define IRQ_GPIO27              0x3b
+
+#ifdef CONFIG_ARCH_FPGA
+#define IRQ_PCIINTA             IRQ_GPIOLOW2
+#define IRQ_PCIINTB             IRQ_GPIOLOW1
+#define IRQ_PCIINTC             IRQ_GPIOLOW0
+#define IRQ_PCIINTD             IRQ_GPIOLOW6
+#endif
+
+#if defined(CONFIG_PUV3_DB0913) || defined(CONFIG_PUV3_NB0916)  \
+        || defined(CONFIG_PUV3_SMW0919)
+#define IRQ_PCIINTA             IRQ_GPIOLOW1
+#define IRQ_PCIINTB             IRQ_GPIOLOW2
+#define IRQ_PCIINTC             IRQ_GPIOLOW3
+#define IRQ_PCIINTD             IRQ_GPIOLOW4
+#endif
+
+#define IRQ_SD_CD               IRQ_GPIO6 /* falling or rising trigger */
+
+#ifndef __ASSEMBLY__
+struct irqaction;
+struct pt_regs;
+extern void migrate_irqs(void);
+
+extern void asm_do_IRQ(unsigned int, struct pt_regs *);
+
+#endif
+
+#endif
+
diff --git a/arch/unicore32/include/asm/irqflags.h b/arch/unicore32/include/asm/irqflags.h
new file mode 100644
index 000000000000..6d8a28dfdbae
--- /dev/null
+++ b/arch/unicore32/include/asm/irqflags.h
@@ -0,0 +1,53 @@
+/*
+ * linux/arch/unicore32/include/asm/irqflags.h
+ *
+ * Code specific to PKUnity SoC and UniCore ISA
+ *
+ * Copyright (C) 2001-2010 GUAN Xue-tao
+ *
+ * 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 __UNICORE_IRQFLAGS_H__
+#define __UNICORE_IRQFLAGS_H__
+
+#ifdef __KERNEL__
+
+#include <asm/ptrace.h>
+
+#define ARCH_IRQ_DISABLED       (PRIV_MODE | PSR_I_BIT)
+#define ARCH_IRQ_ENABLED        (PRIV_MODE)
+
+/*
+ * Save the current interrupt enable state.
+ */
+static inline unsigned long arch_local_save_flags(void)
+{
+        unsigned long temp;
+
+        asm volatile("mov %0, asr" : "=r" (temp) : : "memory", "cc");
+
+        return temp & PSR_c;
+}
+
+/*
+ * restore saved IRQ state
+ */
+static inline void arch_local_irq_restore(unsigned long flags)
+{
+        unsigned long temp;
+
+        asm volatile(
+                "mov    %0, asr\n"
+                "mov.a  asr, %1\n"
+                "mov.f  asr, %0"
+                : "=&r" (temp)
+                : "r" (flags)
+                : "memory", "cc");
+}
+
+#include <asm-generic/irqflags.h>
+
+#endif
+#endif