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Diffstat (limited to 'arch/mips/emma/markeins/irq.c')
-rw-r--r--arch/mips/emma/markeins/irq.c331
1 files changed, 331 insertions, 0 deletions
diff --git a/arch/mips/emma/markeins/irq.c b/arch/mips/emma/markeins/irq.c
new file mode 100644
index 000000000000..c2583ecc93cf
--- /dev/null
+++ b/arch/mips/emma/markeins/irq.c
@@ -0,0 +1,331 @@
+/*
+ * arch/mips/emma2rh/markeins/irq.c
+ * This file defines the irq handler for EMMA2RH.
+ *
+ * Copyright (C) NEC Electronics Corporation 2004-2006
+ *
+ * This file is based on the arch/mips/ddb5xxx/ddb5477/irq.c
+ *
+ * Copyright 2001 MontaVista Software Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/types.h>
+#include <linux/ptrace.h>
+#include <linux/delay.h>
+
+#include <asm/irq_cpu.h>
+#include <asm/system.h>
+#include <asm/mipsregs.h>
+#include <asm/addrspace.h>
+#include <asm/bootinfo.h>
+
+#include <asm/emma/emma2rh.h>
+
+static void emma2rh_irq_enable(unsigned int irq)
+{
+ u32 reg_value;
+ u32 reg_bitmask;
+ u32 reg_index;
+
+ irq -= EMMA2RH_IRQ_BASE;
+
+ reg_index = EMMA2RH_BHIF_INT_EN_0 +
+ (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) * (irq / 32);
+ reg_value = emma2rh_in32(reg_index);
+ reg_bitmask = 0x1 << (irq % 32);
+ emma2rh_out32(reg_index, reg_value | reg_bitmask);
+}
+
+static void emma2rh_irq_disable(unsigned int irq)
+{
+ u32 reg_value;
+ u32 reg_bitmask;
+ u32 reg_index;
+
+ irq -= EMMA2RH_IRQ_BASE;
+
+ reg_index = EMMA2RH_BHIF_INT_EN_0 +
+ (EMMA2RH_BHIF_INT_EN_1 - EMMA2RH_BHIF_INT_EN_0) * (irq / 32);
+ reg_value = emma2rh_in32(reg_index);
+ reg_bitmask = 0x1 << (irq % 32);
+ emma2rh_out32(reg_index, reg_value & ~reg_bitmask);
+}
+
+struct irq_chip emma2rh_irq_controller = {
+ .name = "emma2rh_irq",
+ .ack = emma2rh_irq_disable,
+ .mask = emma2rh_irq_disable,
+ .mask_ack = emma2rh_irq_disable,
+ .unmask = emma2rh_irq_enable,
+};
+
+void emma2rh_irq_init(void)
+{
+ u32 i;
+
+ for (i = 0; i < NUM_EMMA2RH_IRQ; i++)
+ set_irq_chip_and_handler(EMMA2RH_IRQ_BASE + i,
+ &emma2rh_irq_controller,
+ handle_level_irq);
+}
+
+static void emma2rh_sw_irq_enable(unsigned int irq)
+{
+ u32 reg;
+
+ irq -= EMMA2RH_SW_IRQ_BASE;
+
+ reg = emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
+ reg |= 1 << irq;
+ emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, reg);
+}
+
+static void emma2rh_sw_irq_disable(unsigned int irq)
+{
+ u32 reg;
+
+ irq -= EMMA2RH_SW_IRQ_BASE;
+
+ reg = emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
+ reg &= ~(1 << irq);
+ emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, reg);
+}
+
+struct irq_chip emma2rh_sw_irq_controller = {
+ .name = "emma2rh_sw_irq",
+ .ack = emma2rh_sw_irq_disable,
+ .mask = emma2rh_sw_irq_disable,
+ .mask_ack = emma2rh_sw_irq_disable,
+ .unmask = emma2rh_sw_irq_enable,
+};
+
+void emma2rh_sw_irq_init(void)
+{
+ u32 i;
+
+ for (i = 0; i < NUM_EMMA2RH_IRQ_SW; i++)
+ set_irq_chip_and_handler(EMMA2RH_SW_IRQ_BASE + i,
+ &emma2rh_sw_irq_controller,
+ handle_level_irq);
+}
+
+static void emma2rh_gpio_irq_enable(unsigned int irq)
+{
+ u32 reg;
+
+ irq -= EMMA2RH_GPIO_IRQ_BASE;
+
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ reg |= 1 << irq;
+ emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
+}
+
+static void emma2rh_gpio_irq_disable(unsigned int irq)
+{
+ u32 reg;
+
+ irq -= EMMA2RH_GPIO_IRQ_BASE;
+
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ reg &= ~(1 << irq);
+ emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
+}
+
+static void emma2rh_gpio_irq_ack(unsigned int irq)
+{
+ u32 reg;
+
+ irq -= EMMA2RH_GPIO_IRQ_BASE;
+ emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~(1 << irq));
+
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ reg &= ~(1 << irq);
+ emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
+}
+
+static void emma2rh_gpio_irq_end(unsigned int irq)
+{
+ u32 reg;
+
+ if (!(irq_desc[irq].status & (IRQ_DISABLED | IRQ_INPROGRESS))) {
+
+ irq -= EMMA2RH_GPIO_IRQ_BASE;
+
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ reg |= 1 << irq;
+ emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg);
+ }
+}
+
+struct irq_chip emma2rh_gpio_irq_controller = {
+ .name = "emma2rh_gpio_irq",
+ .ack = emma2rh_gpio_irq_ack,
+ .mask = emma2rh_gpio_irq_disable,
+ .mask_ack = emma2rh_gpio_irq_ack,
+ .unmask = emma2rh_gpio_irq_enable,
+ .end = emma2rh_gpio_irq_end,
+};
+
+void emma2rh_gpio_irq_init(void)
+{
+ u32 i;
+
+ for (i = 0; i < NUM_EMMA2RH_IRQ_GPIO; i++)
+ set_irq_chip(EMMA2RH_GPIO_IRQ_BASE + i,
+ &emma2rh_gpio_irq_controller);
+}
+
+static struct irqaction irq_cascade = {
+ .handler = no_action,
+ .flags = 0,
+ .mask = CPU_MASK_NONE,
+ .name = "cascade",
+ .dev_id = NULL,
+ .next = NULL,
+};
+
+/*
+ * the first level int-handler will jump here if it is a emma2rh irq
+ */
+void emma2rh_irq_dispatch(void)
+{
+ u32 intStatus;
+ u32 bitmask;
+ u32 i;
+
+ intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_0) &
+ emma2rh_in32(EMMA2RH_BHIF_INT_EN_0);
+
+#ifdef EMMA2RH_SW_CASCADE
+ if (intStatus &
+ (1 << ((EMMA2RH_SW_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
+ u32 swIntStatus;
+ swIntStatus = emma2rh_in32(EMMA2RH_BHIF_SW_INT)
+ & emma2rh_in32(EMMA2RH_BHIF_SW_INT_EN);
+ for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+ if (swIntStatus & bitmask) {
+ do_IRQ(EMMA2RH_SW_IRQ_BASE + i);
+ return;
+ }
+ }
+ }
+#endif
+
+ for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+ if (intStatus & bitmask) {
+ do_IRQ(EMMA2RH_IRQ_BASE + i);
+ return;
+ }
+ }
+
+ intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_1) &
+ emma2rh_in32(EMMA2RH_BHIF_INT_EN_1);
+
+#ifdef EMMA2RH_GPIO_CASCADE
+ if (intStatus &
+ (1 << ((EMMA2RH_GPIO_CASCADE - EMMA2RH_IRQ_INT0) & (32 - 1)))) {
+ u32 gpioIntStatus;
+ gpioIntStatus = emma2rh_in32(EMMA2RH_GPIO_INT_ST)
+ & emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ for (i = 0, bitmask = 1; i < 32; i++, bitmask <<= 1) {
+ if (gpioIntStatus & bitmask) {
+ do_IRQ(EMMA2RH_GPIO_IRQ_BASE + i);
+ return;
+ }
+ }
+ }
+#endif
+
+ for (i = 32, bitmask = 1; i < 64; i++, bitmask <<= 1) {
+ if (intStatus & bitmask) {
+ do_IRQ(EMMA2RH_IRQ_BASE + i);
+ return;
+ }
+ }
+
+ intStatus = emma2rh_in32(EMMA2RH_BHIF_INT_ST_2) &
+ emma2rh_in32(EMMA2RH_BHIF_INT_EN_2);
+
+ for (i = 64, bitmask = 1; i < 96; i++, bitmask <<= 1) {
+ if (intStatus & bitmask) {
+ do_IRQ(EMMA2RH_IRQ_BASE + i);
+ return;
+ }
+ }
+}
+
+void __init arch_init_irq(void)
+{
+ u32 reg;
+
+ /* by default, interrupts are disabled. */
+ emma2rh_out32(EMMA2RH_BHIF_INT_EN_0, 0);
+ emma2rh_out32(EMMA2RH_BHIF_INT_EN_1, 0);
+ emma2rh_out32(EMMA2RH_BHIF_INT_EN_2, 0);
+ emma2rh_out32(EMMA2RH_BHIF_INT1_EN_0, 0);
+ emma2rh_out32(EMMA2RH_BHIF_INT1_EN_1, 0);
+ emma2rh_out32(EMMA2RH_BHIF_INT1_EN_2, 0);
+ emma2rh_out32(EMMA2RH_BHIF_SW_INT_EN, 0);
+
+ clear_c0_status(0xff00);
+ set_c0_status(0x0400);
+
+#define GPIO_PCI (0xf<<15)
+ /* setup GPIO interrupt for PCI interface */
+ /* direction input */
+ reg = emma2rh_in32(EMMA2RH_GPIO_DIR);
+ emma2rh_out32(EMMA2RH_GPIO_DIR, reg & ~GPIO_PCI);
+ /* disable interrupt */
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MASK);
+ emma2rh_out32(EMMA2RH_GPIO_INT_MASK, reg & ~GPIO_PCI);
+ /* level triggerd */
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_MODE);
+ emma2rh_out32(EMMA2RH_GPIO_INT_MODE, reg | GPIO_PCI);
+ reg = emma2rh_in32(EMMA2RH_GPIO_INT_CND_A);
+ emma2rh_out32(EMMA2RH_GPIO_INT_CND_A, reg & (~GPIO_PCI));
+ /* interrupt clear */
+ emma2rh_out32(EMMA2RH_GPIO_INT_ST, ~GPIO_PCI);
+
+ /* init all controllers */
+ emma2rh_irq_init();
+ emma2rh_sw_irq_init();
+ emma2rh_gpio_irq_init();
+ mips_cpu_irq_init();
+
+ /* setup cascade interrupts */
+ setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_SW_CASCADE, &irq_cascade);
+ setup_irq(EMMA2RH_IRQ_BASE + EMMA2RH_GPIO_CASCADE, &irq_cascade);
+ setup_irq(CPU_IRQ_BASE + CPU_EMMA2RH_CASCADE, &irq_cascade);
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+ unsigned int pending = read_c0_status() & read_c0_cause() & ST0_IM;
+
+ if (pending & STATUSF_IP7)
+ do_IRQ(CPU_IRQ_BASE + 7);
+ else if (pending & STATUSF_IP2)
+ emma2rh_irq_dispatch();
+ else if (pending & STATUSF_IP1)
+ do_IRQ(CPU_IRQ_BASE + 1);
+ else if (pending & STATUSF_IP0)
+ do_IRQ(CPU_IRQ_BASE + 0);
+ else
+ spurious_interrupt();
+}