From 6ee532e2faa9979f0ee00afbfd39cbc034b99153 Mon Sep 17 00:00:00 2001 From: Linus Walleij Date: Sat, 18 Mar 2017 17:53:24 +0100 Subject: [PATCH] irqchip/gemini: Refactor Gemini driver to reflect Faraday origin The Gemini irqchip turns out to be a standard IP component from Faraday Technology named FTINTC010 after some research and new information. - Rename the driver and all symbols to reflect the new information. - Add the new compatible string "faraday,ftintc010" - Create a Kconfig symbol CONFIG_FARADAY_FTINTC010 so that SoCs using this interrupt controller can easily select and reuse it instead of hardwiring it to ARCH_GEMINI I have created a separate patch to select the new Kconfig symbol from the Gemini machine, which will be merged through the ARM SoC tree. Cc: Greentime Hu Cc: Paulius Zaleckas Signed-off-by: Linus Walleij Signed-off-by: Marc Zyngier --- drivers/irqchip/Kconfig | 6 + drivers/irqchip/Makefile | 2 +- drivers/irqchip/irq-ftintc010.c | 187 ++++++++++++++++++++++++++++++++ drivers/irqchip/irq-gemini.c | 185 ------------------------------- 4 files changed, 194 insertions(+), 186 deletions(-) create mode 100644 drivers/irqchip/irq-ftintc010.c delete mode 100644 drivers/irqchip/irq-gemini.c diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 125528f39e92..6afa9e01e610 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -115,6 +115,12 @@ config DW_APB_ICTL select GENERIC_IRQ_CHIP select IRQ_DOMAIN +config FARADAY_FTINTC010 + bool + select IRQ_DOMAIN + select MULTI_IRQ_HANDLER + select SPARSE_IRQ + config HISILICON_IRQ_MBIGEN bool select ARM_GIC_V3 diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 152bc40b6762..cdf3474d3851 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -6,7 +6,7 @@ obj-$(CONFIG_ATH79) += irq-ath79-misc.o obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2835.o obj-$(CONFIG_ARCH_BCM2835) += irq-bcm2836.o obj-$(CONFIG_ARCH_EXYNOS) += exynos-combiner.o -obj-$(CONFIG_ARCH_GEMINI) += irq-gemini.o +obj-$(CONFIG_FARADAY_FTINTC010) += irq-ftintc010.o obj-$(CONFIG_ARCH_HIP04) += irq-hip04.o obj-$(CONFIG_ARCH_LPC32XX) += irq-lpc32xx.o obj-$(CONFIG_ARCH_MMP) += irq-mmp.o diff --git a/drivers/irqchip/irq-ftintc010.c b/drivers/irqchip/irq-ftintc010.c new file mode 100644 index 000000000000..81929aa33990 --- /dev/null +++ b/drivers/irqchip/irq-ftintc010.c @@ -0,0 +1,187 @@ +/* + * irqchip for the Faraday Technology FTINTC010 Copyright (C) 2017 Linus + * Walleij + * + * Based on arch/arm/mach-gemini/irq.c + * Copyright (C) 2001-2006 Storlink, Corp. + * Copyright (C) 2008-2009 Paulius Zaleckas + */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define FT010_NUM_IRQS 32 + +#define FT010_IRQ_SOURCE(base_addr) (base_addr + 0x00) +#define FT010_IRQ_MASK(base_addr) (base_addr + 0x04) +#define FT010_IRQ_CLEAR(base_addr) (base_addr + 0x08) +#define FT010_IRQ_MODE(base_addr) (base_addr + 0x0C) +#define FT010_IRQ_POLARITY(base_addr) (base_addr + 0x10) +#define FT010_IRQ_STATUS(base_addr) (base_addr + 0x14) +#define FT010_FIQ_SOURCE(base_addr) (base_addr + 0x20) +#define FT010_FIQ_MASK(base_addr) (base_addr + 0x24) +#define FT010_FIQ_CLEAR(base_addr) (base_addr + 0x28) +#define FT010_FIQ_MODE(base_addr) (base_addr + 0x2C) +#define FT010_FIQ_POLARITY(base_addr) (base_addr + 0x30) +#define FT010_FIQ_STATUS(base_addr) (base_addr + 0x34) + +/** + * struct ft010_irq_data - irq data container for the Faraday IRQ controller + * @base: memory offset in virtual memory + * @chip: chip container for this instance + * @domain: IRQ domain for this instance + */ +struct ft010_irq_data { + void __iomem *base; + struct irq_chip chip; + struct irq_domain *domain; +}; + +static void ft010_irq_mask(struct irq_data *d) +{ + struct ft010_irq_data *f = irq_data_get_irq_chip_data(d); + unsigned int mask; + + mask = readl(FT010_IRQ_MASK(f->base)); + mask &= ~BIT(irqd_to_hwirq(d)); + writel(mask, FT010_IRQ_MASK(f->base)); +} + +static void ft010_irq_unmask(struct irq_data *d) +{ + struct ft010_irq_data *f = irq_data_get_irq_chip_data(d); + unsigned int mask; + + mask = readl(FT010_IRQ_MASK(f->base)); + mask |= BIT(irqd_to_hwirq(d)); + writel(mask, FT010_IRQ_MASK(f->base)); +} + +static void ft010_irq_ack(struct irq_data *d) +{ + struct ft010_irq_data *f = irq_data_get_irq_chip_data(d); + + writel(BIT(irqd_to_hwirq(d)), FT010_IRQ_CLEAR(f->base)); +} + +static int ft010_irq_set_type(struct irq_data *d, unsigned int trigger) +{ + struct ft010_irq_data *f = irq_data_get_irq_chip_data(d); + int offset = irqd_to_hwirq(d); + u32 mode, polarity; + + mode = readl(FT010_IRQ_MODE(f->base)); + polarity = readl(FT010_IRQ_POLARITY(f->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, FT010_IRQ_MODE(f->base)); + writel(polarity, FT010_IRQ_POLARITY(f->base)); + + return 0; +} + +static struct irq_chip ft010_irq_chip = { + .name = "FTINTC010", + .irq_ack = ft010_irq_ack, + .irq_mask = ft010_irq_mask, + .irq_unmask = ft010_irq_unmask, + .irq_set_type = ft010_irq_set_type, +}; + +/* Local static for the IRQ entry call */ +static struct ft010_irq_data firq; + +asmlinkage void __exception_irq_entry ft010_irqchip_handle_irq(struct pt_regs *regs) +{ + struct ft010_irq_data *f = &firq; + int irq; + u32 status; + + while ((status = readl(FT010_IRQ_STATUS(f->base)))) { + irq = ffs(status) - 1; + handle_domain_irq(f->domain, irq, regs); + } +} + +static int ft010_irqdomain_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) +{ + struct ft010_irq_data *f = d->host_data; + + irq_set_chip_data(irq, f); + /* All IRQs should set up their type, flags as bad by default */ + irq_set_chip_and_handler(irq, &ft010_irq_chip, handle_bad_irq); + irq_set_probe(irq); + + return 0; +} + +static void ft010_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 ft010_irqdomain_ops = { + .map = ft010_irqdomain_map, + .unmap = ft010_irqdomain_unmap, + .xlate = irq_domain_xlate_onetwocell, +}; + +int __init ft010_of_init_irq(struct device_node *node, + struct device_node *parent) +{ + struct ft010_irq_data *f = &firq; + + /* + * 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); + + f->base = of_iomap(node, 0); + WARN(!f->base, "unable to map gemini irq registers\n"); + + /* Disable all interrupts */ + writel(0, FT010_IRQ_MASK(f->base)); + writel(0, FT010_FIQ_MASK(f->base)); + + f->domain = irq_domain_add_simple(node, FT010_NUM_IRQS, 0, + &ft010_irqdomain_ops, f); + set_handle_irq(ft010_irqchip_handle_irq); + + return 0; +} +IRQCHIP_DECLARE(faraday, "faraday,ftintc010", + ft010_of_init_irq); +IRQCHIP_DECLARE(gemini, "cortina,gemini-interrupt-controller", + ft010_of_init_irq); 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 - * - * Based on arch/arm/mach-gemini/irq.c - * Copyright (C) 2001-2006 Storlink, Corp. - * Copyright (C) 2008-2009 Paulius Zaleckas - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include -#include - -#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);