ARM: Introduce plat-tcc irq framework

Introduce lowlevel interrupt routines.

Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

4 files changed, 196 insertions, 1 deletions

diff --git a/arch/arm/mach-tcc8k/Makefile b/arch/arm/mach-tcc8k/Makefile
index 805d850919e..53bc2f58549 100644
--- a/arch/arm/mach-tcc8k/Makefile
+++ b/arch/arm/mach-tcc8k/Makefile
@@ -3,4 +3,4 @@
 #
 
 # Common support
-obj-y += clock.o
+obj-y += clock.o irq.o
diff --git a/arch/arm/mach-tcc8k/common.h b/arch/arm/mach-tcc8k/common.h
index e2c902c1639..e539548e58d 100644
--- a/arch/arm/mach-tcc8k/common.h
+++ b/arch/arm/mach-tcc8k/common.h
@@ -2,5 +2,6 @@
 #define MACH_TCC8K_COMMON_H
 
 extern void tcc_clocks_init(unsigned long xi_freq, unsigned long xti_freq);
+extern void tcc8k_init_irq(void);
 
 #endif
diff --git a/arch/arm/mach-tcc8k/irq.c b/arch/arm/mach-tcc8k/irq.c
new file mode 100644
index 00000000000..34575c4963f
--- /dev/null
+++ b/arch/arm/mach-tcc8k/irq.c
@@ -0,0 +1,111 @@
+/*
+ * Copyright (C) Telechips, Inc.
+ * Copyright (C) 2009-2010 Hans J. Koch <hjk@linutronix.de>
+ *
+ * Licensed under the terms of the GNU GPL version 2.
+ */
+
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+
+#include <mach/tcc8k-regs.h>
+#include <mach/irqs.h>
+
+#include "common.h"
+
+/* Disable IRQ */
+static void tcc8000_mask_ack_irq0(unsigned int irq)
+{
+        PIC0_IEN &= ~(1 << irq);
+        PIC0_CREQ |=  (1 << irq);
+}
+
+static void tcc8000_mask_ack_irq1(unsigned int irq)
+{
+        PIC1_IEN &= ~(1 << (irq - 32));
+        PIC1_CREQ |= (1 << (irq - 32));
+}
+
+static void tcc8000_mask_irq0(unsigned int irq)
+{
+        PIC0_IEN &= ~(1 << irq);
+}
+
+static void tcc8000_mask_irq1(unsigned int irq)
+{
+        PIC1_IEN &= ~(1 << (irq - 32));
+}
+
+static void tcc8000_ack_irq0(unsigned int irq)
+{
+        PIC0_CREQ |=  (1 << irq);
+}
+
+static void tcc8000_ack_irq1(unsigned int irq)
+{
+        PIC1_CREQ |= (1 << (irq - 32));
+}
+
+/* Enable IRQ */
+static void tcc8000_unmask_irq0(unsigned int irq)
+{
+        PIC0_IEN |= (1 << irq);
+        PIC0_INTOEN |= (1 << irq);
+}
+
+static void tcc8000_unmask_irq1(unsigned int irq)
+{
+        PIC1_IEN |= (1 << (irq - 32));
+        PIC1_INTOEN |= (1 << (irq - 32));
+}
+
+static struct irq_chip tcc8000_irq_chip0 = {
+        .name           = "tcc_irq0",
+        .mask           = tcc8000_mask_irq0,
+        .ack            = tcc8000_ack_irq0,
+        .mask_ack       = tcc8000_mask_ack_irq0,
+        .unmask         = tcc8000_unmask_irq0,
+};
+
+static struct irq_chip tcc8000_irq_chip1 = {
+        .name           = "tcc_irq1",
+        .mask           = tcc8000_mask_irq1,
+        .ack            = tcc8000_ack_irq1,
+        .mask_ack       = tcc8000_mask_ack_irq1,
+        .unmask         = tcc8000_unmask_irq1,
+};
+
+void __init tcc8k_init_irq(void)
+{
+        int irqno;
+
+        /* Mask and clear all interrupts */
+        PIC0_IEN = 0x00000000;
+        PIC0_CREQ = 0xffffffff;
+        PIC1_IEN = 0x00000000;
+        PIC1_CREQ = 0xffffffff;
+
+        PIC0_MEN0 = 0x00000003;
+        PIC1_MEN1 = 0x00000003;
+        PIC1_MEN = 0x00000003;
+
+        /* let all IRQs be level triggered */
+        PIC0_TMODE = 0xffffffff;
+        PIC1_TMODE = 0xffffffff;
+        /* all IRQs are IRQs (not FIQs) */
+        PIC0_IRQSEL = 0xffffffff;
+        PIC1_IRQSEL = 0xffffffff;
+
+        for (irqno = 0; irqno < NR_IRQS; irqno++) {
+                if (irqno < 32)
+                        set_irq_chip(irqno, &tcc8000_irq_chip0);
+                else
+                        set_irq_chip(irqno, &tcc8000_irq_chip1);
+                set_irq_handler(irqno, handle_level_irq);
+                set_irq_flags(irqno, IRQF_VALID);
+        }
+}
diff --git a/arch/arm/plat-tcc/include/mach/irqs.h b/arch/arm/plat-tcc/include/mach/irqs.h
new file mode 100644
index 00000000000..da863894d49
--- /dev/null
+++ b/arch/arm/plat-tcc/include/mach/irqs.h
@@ -0,0 +1,83 @@
+/*
+ * IRQ definitions for TCC8xxx
+ *
+ * Copyright (C) 2008-2009 Telechips
+ * Copyright (C) 2009 Hans J. Koch <hjk@linutronix.de>
+ *
+ * Licensed under the terms of the GPL v2.
+ *
+ */
+
+#ifndef __ASM_ARCH_TCC_IRQS_H
+#define __ASM_ARCH_TCC_IRQS_H
+
+#define NR_IRQS 64
+
+/* PIC0 interrupts */
+#define INT_ADMA1       0
+#define INT_BDMA        1
+#define INT_ADMA0       2
+#define INT_GDMA1       3
+#define INT_I2S0RX      4
+#define INT_I2S0TX      5
+#define INT_TC          6
+#define INT_UART0       7
+#define INT_USBD        8
+#define INT_SPI0TX      9
+#define INT_UDMA        10
+#define INT_LIRQ        11
+#define INT_GDMA2       12
+#define INT_GDMA0       13
+#define INT_TC32        14
+#define INT_LCD         15
+#define INT_ADC         16
+#define INT_I2C         17
+#define INT_RTCP        18
+#define INT_RTCA        19
+#define INT_NFC         20
+#define INT_SD0         21
+#define INT_GSB0        22
+#define INT_PK          23
+#define INT_USBH0       24
+#define INT_USBH1       25
+#define INT_G2D         26
+#define INT_ECC         27
+#define INT_SPI0RX      28
+#define INT_UART1       29
+#define INT_MSCL        30
+#define INT_GSB1        31
+/* PIC1 interrupts */
+#define INT_E0          32
+#define INT_E1          33
+#define INT_E2          34
+#define INT_E3          35
+#define INT_E4          36
+#define INT_E5          37
+#define INT_E6          38
+#define INT_E7          39
+#define INT_UART2       40
+#define INT_UART3       41
+#define INT_SPI1TX      42
+#define INT_SPI1RX      43
+#define INT_GSB2        44
+#define INT_SPDIF       45
+#define INT_CDIF        46
+#define INT_VBON        47
+#define INT_VBOFF       48
+#define INT_SD1         49
+#define INT_UART4       50
+#define INT_GDMA3       51
+#define INT_I2S1RX      52
+#define INT_I2S1TX      53
+#define INT_CAN0        54
+#define INT_CAN1        55
+#define INT_GSB3        56
+#define INT_KRST        57
+#define INT_UNUSED      58
+#define INT_SD0D3       59
+#define INT_SD1D3       60
+#define INT_GPS0        61
+#define INT_GPS1        62
+#define INT_GPS2        63
+
+#endif  /* ASM_ARCH_TCC_IRQS_H */