diff options
Diffstat (limited to 'drivers/irqchip/irq-gemini.c')
| -rw-r--r-- | drivers/irqchip/irq-gemini.c | 185 |
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); |