[PATCH 03/07] Introduce plat-tcc irq framework

Hans J. Koch
2010-03-22T19:24:35Z

Introduce lowlevel interrupt routines.

Signed-off-by: "Hans J. Koch" <hjk@linutronix.de>
---
arch/arm/mach-tcc8k/Makefile | 3 +-
arch/arm/mach-tcc8k/irq.c | 113 +++++++++++++++++++++++++++++++++
arch/arm/plat-tcc/include/mach/irqs.h | 84 ++++++++++++++++++++++++
3 files changed, 199 insertions(+), 1 deletions(-)
create mode 100644 arch/arm/mach-tcc8k/irq.c
create mode 100644 arch/arm/plat-tcc/include/mach/irqs.h

diff --git a/arch/arm/mach-tcc8k/Makefile b/arch/arm/mach-tcc8k/Makefile
index 805d850..24356e9 100644
--- a/arch/arm/mach-tcc8k/Makefile
+++ b/arch/arm/mach-tcc8k/Makefile
@@ -3,4 +3,5 @@
#

# Common support
-obj-y += clock.o
+obj-y += clock.o irq.o
+
diff --git a/arch/arm/mach-tcc8k/irq.c b/arch/arm/mach-tcc8k/irq.c
new file mode 100644
index 0000000..4d72859
--- /dev/null
+++ b/arch/arm/mach-tcc8k/irq.c
@@ -0,0 +1,113 @@
+/*
+ * 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/module.h>
+#include <linux/sched.h>
+#include <linux/interrupt.h>
+#include <linux/ptrace.h>
+
+#include <asm/irq.h>
+#include <asm/mach/irq.h>
+#include <asm/io.h>
+
+#include <mach/tcc8k-regs.h>
+#include <mach/irqs.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 0000000..2e6bed8
--- /dev/null
+++ b/arch/arm/plat-tcc/include/mach/irqs.h
@@ -0,0 +1,84 @@
+/*
+ * 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 */
+
--
1.6.3.3