summaryrefslogtreecommitdiffstats
path: root/drivers/irqchip/irq-sunxi.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/irqchip/irq-sunxi.c')
-rw-r--r--drivers/irqchip/irq-sunxi.c151
1 files changed, 0 insertions, 151 deletions
diff --git a/drivers/irqchip/irq-sunxi.c b/drivers/irqchip/irq-sunxi.c
deleted file mode 100644
index 10974fa4265..00000000000
--- a/drivers/irqchip/irq-sunxi.c
+++ /dev/null
@@ -1,151 +0,0 @@
-/*
- * Allwinner A1X SoCs IRQ chip driver.
- *
- * Copyright (C) 2012 Maxime Ripard
- *
- * Maxime Ripard <maxime.ripard@free-electrons.com>
- *
- * Based on code from
- * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
- * Benn Huang <benn@allwinnertech.com>
- *
- * This file is licensed under the terms of the GNU General Public
- * License version 2. This program is licensed "as is" without any
- * warranty of any kind, whether express or implied.
- */
-
-#include <linux/io.h>
-#include <linux/irq.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-
-#include <linux/irqchip/sunxi.h>
-
-#define SUNXI_IRQ_VECTOR_REG 0x00
-#define SUNXI_IRQ_PROTECTION_REG 0x08
-#define SUNXI_IRQ_NMI_CTRL_REG 0x0c
-#define SUNXI_IRQ_PENDING_REG(x) (0x10 + 0x4 * x)
-#define SUNXI_IRQ_FIQ_PENDING_REG(x) (0x20 + 0x4 * x)
-#define SUNXI_IRQ_ENABLE_REG(x) (0x40 + 0x4 * x)
-#define SUNXI_IRQ_MASK_REG(x) (0x50 + 0x4 * x)
-
-static void __iomem *sunxi_irq_base;
-static struct irq_domain *sunxi_irq_domain;
-
-void sunxi_irq_ack(struct irq_data *irqd)
-{
- unsigned int irq = irqd_to_hwirq(irqd);
- unsigned int irq_off = irq % 32;
- int reg = irq / 32;
- u32 val;
-
- val = readl(sunxi_irq_base + SUNXI_IRQ_PENDING_REG(reg));
- writel(val | (1 << irq_off),
- sunxi_irq_base + SUNXI_IRQ_PENDING_REG(reg));
-}
-
-static void sunxi_irq_mask(struct irq_data *irqd)
-{
- unsigned int irq = irqd_to_hwirq(irqd);
- unsigned int irq_off = irq % 32;
- int reg = irq / 32;
- u32 val;
-
- val = readl(sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg));
- writel(val & ~(1 << irq_off),
- sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg));
-}
-
-static void sunxi_irq_unmask(struct irq_data *irqd)
-{
- unsigned int irq = irqd_to_hwirq(irqd);
- unsigned int irq_off = irq % 32;
- int reg = irq / 32;
- u32 val;
-
- val = readl(sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg));
- writel(val | (1 << irq_off),
- sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(reg));
-}
-
-static struct irq_chip sunxi_irq_chip = {
- .name = "sunxi_irq",
- .irq_ack = sunxi_irq_ack,
- .irq_mask = sunxi_irq_mask,
- .irq_unmask = sunxi_irq_unmask,
-};
-
-static int sunxi_irq_map(struct irq_domain *d, unsigned int virq,
- irq_hw_number_t hw)
-{
- irq_set_chip_and_handler(virq, &sunxi_irq_chip,
- handle_level_irq);
- set_irq_flags(virq, IRQF_VALID | IRQF_PROBE);
-
- return 0;
-}
-
-static struct irq_domain_ops sunxi_irq_ops = {
- .map = sunxi_irq_map,
- .xlate = irq_domain_xlate_onecell,
-};
-
-static int __init sunxi_of_init(struct device_node *node,
- struct device_node *parent)
-{
- sunxi_irq_base = of_iomap(node, 0);
- if (!sunxi_irq_base)
- panic("%s: unable to map IC registers\n",
- node->full_name);
-
- /* Disable all interrupts */
- writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(0));
- writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(1));
- writel(0, sunxi_irq_base + SUNXI_IRQ_ENABLE_REG(2));
-
- /* Mask all the interrupts */
- writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(0));
- writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(1));
- writel(0, sunxi_irq_base + SUNXI_IRQ_MASK_REG(2));
-
- /* Clear all the pending interrupts */
- writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(0));
- writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(1));
- writel(0xffffffff, sunxi_irq_base + SUNXI_IRQ_PENDING_REG(2));
-
- /* Enable protection mode */
- writel(0x01, sunxi_irq_base + SUNXI_IRQ_PROTECTION_REG);
-
- /* Configure the external interrupt source type */
- writel(0x00, sunxi_irq_base + SUNXI_IRQ_NMI_CTRL_REG);
-
- sunxi_irq_domain = irq_domain_add_linear(node, 3 * 32,
- &sunxi_irq_ops, NULL);
- if (!sunxi_irq_domain)
- panic("%s: unable to create IRQ domain\n", node->full_name);
-
- return 0;
-}
-
-static struct of_device_id sunxi_irq_dt_ids[] __initconst = {
- { .compatible = "allwinner,sunxi-ic", .data = sunxi_of_init },
- { }
-};
-
-void __init sunxi_init_irq(void)
-{
- of_irq_init(sunxi_irq_dt_ids);
-}
-
-asmlinkage void __exception_irq_entry sunxi_handle_irq(struct pt_regs *regs)
-{
- u32 irq, hwirq;
-
- hwirq = readl(sunxi_irq_base + SUNXI_IRQ_VECTOR_REG) >> 2;
- while (hwirq != 0) {
- irq = irq_find_mapping(sunxi_irq_domain, hwirq);
- handle_IRQ(irq, regs);
- hwirq = readl(sunxi_irq_base + SUNXI_IRQ_VECTOR_REG) >> 2;
- }
-}