diff options
| -rw-r--r-- | drivers/irqchip/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/irqchip/Makefile | 1 | ||||
| -rw-r--r-- | drivers/irqchip/irq-rda-intc.c | 107 |
3 files changed, 112 insertions, 0 deletions
diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig index 51a5ef0e96ed..9d54645870ad 100644 --- a/drivers/irqchip/Kconfig +++ b/drivers/irqchip/Kconfig @@ -195,6 +195,10 @@ config JCORE_AIC help Support for the J-Core integrated AIC. +config RDA_INTC + bool + select IRQ_DOMAIN + config RENESAS_INTC_IRQPIN bool select IRQ_DOMAIN diff --git a/drivers/irqchip/Makefile b/drivers/irqchip/Makefile index 794c13d3ac3d..417108027e40 100644 --- a/drivers/irqchip/Makefile +++ b/drivers/irqchip/Makefile @@ -43,6 +43,7 @@ obj-$(CONFIG_IMGPDC_IRQ) += irq-imgpdc.o obj-$(CONFIG_IRQ_MIPS_CPU) += irq-mips-cpu.o obj-$(CONFIG_SIRF_IRQ) += irq-sirfsoc.o obj-$(CONFIG_JCORE_AIC) += irq-jcore-aic.o +obj-$(CONFIG_RDA_INTC) += irq-rda-intc.o obj-$(CONFIG_RENESAS_INTC_IRQPIN) += irq-renesas-intc-irqpin.o obj-$(CONFIG_RENESAS_IRQC) += irq-renesas-irqc.o obj-$(CONFIG_VERSATILE_FPGA_IRQ) += irq-versatile-fpga.o diff --git a/drivers/irqchip/irq-rda-intc.c b/drivers/irqchip/irq-rda-intc.c new file mode 100644 index 000000000000..1176291fdef8 --- /dev/null +++ b/drivers/irqchip/irq-rda-intc.c @@ -0,0 +1,107 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * RDA8810PL SoC irqchip driver + * + * Copyright RDA Microelectronics Company Limited + * Copyright (c) 2017 Andreas Färber + * Copyright (c) 2018 Manivannan Sadhasivam + */ + +#include <linux/init.h> +#include <linux/interrupt.h> +#include <linux/irq.h> +#include <linux/irqchip.h> +#include <linux/irqdomain.h> +#include <linux/of_address.h> + +#include <asm/exception.h> + +#define RDA_INTC_FINALSTATUS 0x00 +#define RDA_INTC_MASK_SET 0x08 +#define RDA_INTC_MASK_CLR 0x0c + +#define RDA_IRQ_MASK_ALL 0xFFFFFFFF + +#define RDA_NR_IRQS 32 + +static void __iomem *rda_intc_base; +static struct irq_domain *rda_irq_domain; + +static void rda_intc_mask_irq(struct irq_data *d) +{ + writel_relaxed(BIT(d->hwirq), rda_intc_base + RDA_INTC_MASK_CLR); +} + +static void rda_intc_unmask_irq(struct irq_data *d) +{ + writel_relaxed(BIT(d->hwirq), rda_intc_base + RDA_INTC_MASK_SET); +} + +static int rda_intc_set_type(struct irq_data *data, unsigned int flow_type) +{ + /* Hardware supports only level triggered interrupts */ + if ((flow_type & (IRQF_TRIGGER_HIGH | IRQF_TRIGGER_LOW)) == flow_type) + return 0; + + return -EINVAL; +} + +static void __exception_irq_entry rda_handle_irq(struct pt_regs *regs) +{ + u32 stat = readl_relaxed(rda_intc_base + RDA_INTC_FINALSTATUS); + u32 hwirq; + + while (stat) { + hwirq = __fls(stat); + handle_domain_irq(rda_irq_domain, hwirq, regs); + stat &= ~BIT(hwirq); + } +} + +static struct irq_chip rda_irq_chip = { + .name = "rda-intc", + .irq_mask = rda_intc_mask_irq, + .irq_unmask = rda_intc_unmask_irq, + .irq_set_type = rda_intc_set_type, +}; + +static int rda_irq_map(struct irq_domain *d, + unsigned int virq, irq_hw_number_t hw) +{ + irq_set_status_flags(virq, IRQ_LEVEL); + irq_set_chip_and_handler(virq, &rda_irq_chip, handle_level_irq); + irq_set_chip_data(virq, d->host_data); + irq_set_probe(virq); + + return 0; +} + +static const struct irq_domain_ops rda_irq_domain_ops = { + .map = rda_irq_map, + .xlate = irq_domain_xlate_onecell, +}; + +static int __init rda8810_intc_init(struct device_node *node, + struct device_node *parent) +{ + rda_intc_base = of_io_request_and_map(node, 0, "rda-intc"); + if (!rda_intc_base) + return -ENXIO; + + /* Mask all interrupt sources */ + writel_relaxed(RDA_IRQ_MASK_ALL, rda_intc_base + RDA_INTC_MASK_CLR); + + rda_irq_domain = irq_domain_create_linear(&node->fwnode, RDA_NR_IRQS, + &rda_irq_domain_ops, + rda_intc_base); + if (!rda_irq_domain) { + iounmap(rda_intc_base); + return -ENOMEM; + } + + set_handle_irq(rda_handle_irq); + + return 0; +} + +IRQCHIP_DECLARE(rda_intc, "rda,8810pl-intc", rda8810_intc_init); |