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Diffstat (limited to 'drivers/irqchip/irq-gemini.c')
-rw-r--r--drivers/irqchip/irq-gemini.c185
1 files changed, 0 insertions, 185 deletions
diff --git a/drivers/irqchip/irq-gemini.c b/drivers/irqchip/irq-gemini.c
deleted file mode 100644
index 495224c743ee..000000000000
--- a/drivers/irqchip/irq-gemini.c
+++ /dev/null
@@ -1,185 +0,0 @@
-/*
- * irqchip for the Cortina Systems Gemini Copyright (C) 2017 Linus
- * Walleij <linus.walleij@linaro.org>
- *
- * Based on arch/arm/mach-gemini/irq.c
- * Copyright (C) 2001-2006 Storlink, Corp.
- * Copyright (C) 2008-2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
- */
-#include <linux/bitops.h>
-#include <linux/irq.h>
-#include <linux/io.h>
-#include <linux/irqchip.h>
-#include <linux/irqchip/versatile-fpga.h>
-#include <linux/irqdomain.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_address.h>
-#include <linux/of_irq.h>
-#include <linux/cpu.h>
-
-#include <asm/exception.h>
-#include <asm/mach/irq.h>
-
-#define GEMINI_NUM_IRQS 32
-
-#define GEMINI_IRQ_SOURCE(base_addr) (base_addr + 0x00)
-#define GEMINI_IRQ_MASK(base_addr) (base_addr + 0x04)
-#define GEMINI_IRQ_CLEAR(base_addr) (base_addr + 0x08)
-#define GEMINI_IRQ_MODE(base_addr) (base_addr + 0x0C)
-#define GEMINI_IRQ_POLARITY(base_addr) (base_addr + 0x10)
-#define GEMINI_IRQ_STATUS(base_addr) (base_addr + 0x14)
-#define GEMINI_FIQ_SOURCE(base_addr) (base_addr + 0x20)
-#define GEMINI_FIQ_MASK(base_addr) (base_addr + 0x24)
-#define GEMINI_FIQ_CLEAR(base_addr) (base_addr + 0x28)
-#define GEMINI_FIQ_MODE(base_addr) (base_addr + 0x2C)
-#define GEMINI_FIQ_POLARITY(base_addr) (base_addr + 0x30)
-#define GEMINI_FIQ_STATUS(base_addr) (base_addr + 0x34)
-
-/**
- * struct gemini_irq_data - irq data container for the Gemini IRQ controller
- * @base: memory offset in virtual memory
- * @chip: chip container for this instance
- * @domain: IRQ domain for this instance
- */
-struct gemini_irq_data {
- void __iomem *base;
- struct irq_chip chip;
- struct irq_domain *domain;
-};
-
-static void gemini_irq_mask(struct irq_data *d)
-{
- struct gemini_irq_data *g = irq_data_get_irq_chip_data(d);
- unsigned int mask;
-
- mask = readl(GEMINI_IRQ_MASK(g->base));
- mask &= ~BIT(irqd_to_hwirq(d));
- writel(mask, GEMINI_IRQ_MASK(g->base));
-}
-
-static void gemini_irq_unmask(struct irq_data *d)
-{
- struct gemini_irq_data *g = irq_data_get_irq_chip_data(d);
- unsigned int mask;
-
- mask = readl(GEMINI_IRQ_MASK(g->base));
- mask |= BIT(irqd_to_hwirq(d));
- writel(mask, GEMINI_IRQ_MASK(g->base));
-}
-
-static void gemini_irq_ack(struct irq_data *d)
-{
- struct gemini_irq_data *g = irq_data_get_irq_chip_data(d);
-
- writel(BIT(irqd_to_hwirq(d)), GEMINI_IRQ_CLEAR(g->base));
-}
-
-static int gemini_irq_set_type(struct irq_data *d, unsigned int trigger)
-{
- struct gemini_irq_data *g = irq_data_get_irq_chip_data(d);
- int offset = irqd_to_hwirq(d);
- u32 mode, polarity;
-
- mode = readl(GEMINI_IRQ_MODE(g->base));
- polarity = readl(GEMINI_IRQ_POLARITY(g->base));
-
- if (trigger & (IRQ_TYPE_LEVEL_HIGH)) {
- irq_set_handler_locked(d, handle_level_irq);
- /* Disable edge detection */
- mode &= ~BIT(offset);
- polarity &= ~BIT(offset);
- } else if (trigger & IRQ_TYPE_EDGE_RISING) {
- irq_set_handler_locked(d, handle_edge_irq);
- mode |= BIT(offset);
- polarity |= BIT(offset);
- } else if (trigger & IRQ_TYPE_EDGE_FALLING) {
- irq_set_handler_locked(d, handle_edge_irq);
- mode |= BIT(offset);
- polarity &= ~BIT(offset);
- } else {
- irq_set_handler_locked(d, handle_bad_irq);
- pr_warn("GEMINI IRQ: no supported trigger selected for line %d\n",
- offset);
- }
-
- writel(mode, GEMINI_IRQ_MODE(g->base));
- writel(polarity, GEMINI_IRQ_POLARITY(g->base));
-
- return 0;
-}
-
-static struct irq_chip gemini_irq_chip = {
- .name = "GEMINI",
- .irq_ack = gemini_irq_ack,
- .irq_mask = gemini_irq_mask,
- .irq_unmask = gemini_irq_unmask,
- .irq_set_type = gemini_irq_set_type,
-};
-
-/* Local static for the IRQ entry call */
-static struct gemini_irq_data girq;
-
-asmlinkage void __exception_irq_entry gemini_irqchip_handle_irq(struct pt_regs *regs)
-{
- struct gemini_irq_data *g = &girq;
- int irq;
- u32 status;
-
- while ((status = readl(GEMINI_IRQ_STATUS(g->base)))) {
- irq = ffs(status) - 1;
- handle_domain_irq(g->domain, irq, regs);
- }
-}
-
-static int gemini_irqdomain_map(struct irq_domain *d, unsigned int irq,
- irq_hw_number_t hwirq)
-{
- struct gemini_irq_data *g = d->host_data;
-
- irq_set_chip_data(irq, g);
- /* All IRQs should set up their type, flags as bad by default */
- irq_set_chip_and_handler(irq, &gemini_irq_chip, handle_bad_irq);
- irq_set_probe(irq);
-
- return 0;
-}
-
-static void gemini_irqdomain_unmap(struct irq_domain *d, unsigned int irq)
-{
- irq_set_chip_and_handler(irq, NULL, NULL);
- irq_set_chip_data(irq, NULL);
-}
-
-static const struct irq_domain_ops gemini_irqdomain_ops = {
- .map = gemini_irqdomain_map,
- .unmap = gemini_irqdomain_unmap,
- .xlate = irq_domain_xlate_onetwocell,
-};
-
-int __init gemini_of_init_irq(struct device_node *node,
- struct device_node *parent)
-{
- struct gemini_irq_data *g = &girq;
-
- /*
- * Disable the idle handler by default since it is buggy
- * For more info see arch/arm/mach-gemini/idle.c
- */
- cpu_idle_poll_ctrl(true);
-
- g->base = of_iomap(node, 0);
- WARN(!g->base, "unable to map gemini irq registers\n");
-
- /* Disable all interrupts */
- writel(0, GEMINI_IRQ_MASK(g->base));
- writel(0, GEMINI_FIQ_MASK(g->base));
-
- g->domain = irq_domain_add_simple(node, GEMINI_NUM_IRQS, 0,
- &gemini_irqdomain_ops, g);
- set_handle_irq(gemini_irqchip_handle_irq);
-
- return 0;
-}
-IRQCHIP_DECLARE(gemini, "cortina,gemini-interrupt-controller",
- gemini_of_init_irq);