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Commit 8a764482 authored by Yoshinori Sato's avatar Yoshinori Sato
Browse files

h8300: IRQ chip driver 



Signed-off-by: default avatarYoshinori Sato <ysato@users.sourceforge.jp>
parent 618b902d

Documentation/devicetree/bindings/interrupt-controller/renesas,h8300h-intc.txt

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* H8/300H Interrupt controller



Required properties:



- compatible: has to be "renesas,h8300h-intc", "renesas,h8300-intc" as fallback.

- #interrupt-cells: has to be <2>: an interrupt index and flags, as defined in

  interrupts.txt in this directory

- regs: Base address of interrupt controller registers.



Optional properties:



- any properties, listed in interrupts.txt, and any standard resource allocation

  properties



Example:



	h8intc: interrupt-controller@fee012 {

		compatible = "renesas,h8300h-intc", "renesas,h8300-intc";

		#interrupt-cells = <2>;

		interrupt-controller;

		reg = <0xfee012 7>;

	};

Documentation/devicetree/bindings/interrupt-controller/renesas,h8s-intc.txt

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* H8S Interrupt controller



Required properties:



- compatible: has to be "renesas,h8s-intc", "renesas,h8300-intc" as fallback.

- #interrupt-cells: has to be <2>: an interrupt index and flags, as defined in

  interrupts.txt in this directory

- regs: Base address of interrupt controller registers.



Optional properties:



- any properties, listed in interrupts.txt, and any standard resource allocation

  properties



Example:



	h8intc: interrupt-controller@fffe00 {

		compatible = "renesas,h8s-intc", "renesas,h8300-intc";

		#interrupt-cells = <2>;

		interrupt-controller;

		reg = <0xfffe00 24>;

	};

drivers/irqchip/Kconfig

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@@ -158,3 +158,11 @@ config KEYSTONE_IRQ 
config MIPS_GIC

	bool

	select MIPS_CM



config RENESAS_H8300H_INTC

        bool

	select IRQ_DOMAIN



config RENESAS_H8S_INTC

        bool

	select IRQ_DOMAIN
 
 No newline at end of file

drivers/irqchip/Makefile

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@@ -47,3 +47,5 @@ obj-$(CONFIG_KEYSTONE_IRQ) += irq-keystone.o 
obj-$(CONFIG_MIPS_GIC)			+= irq-mips-gic.o

obj-$(CONFIG_ARCH_MEDIATEK)		+= irq-mtk-sysirq.o

obj-$(CONFIG_ARCH_DIGICOLOR)		+= irq-digicolor.o

obj-$(CONFIG_RENESAS_H8300H_INTC)	+= irq-renesas-h8300h.o

obj-$(CONFIG_RENESAS_H8S_INTC)		+= irq-renesas-h8s.o

drivers/irqchip/irq-renesas-h8300h.c

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/*

 * H8/300H interrupt controller driver

 *

 * Copyright 2015 Yoshinori Sato <ysato@users.sourceforge.jp>

 */



#include <linux/init.h>

#include <linux/irq.h>

#include <linux/irqchip.h>

#include <linux/of_address.h>

#include <linux/of_irq.h>

#include <asm/io.h>



#include "irqchip.h"



static const char ipr_bit[] = {

	 7,  6,  5,  5,

	 4,  4,  4,  4,  3,  3,  3,  3,

	 2,  2,  2,  2,  1,  1,  1,  1,

	 0,  0,  0,  0, 15, 15, 15, 15,

	14, 14, 14, 14, 13, 13, 13, 13,

	-1, -1, -1, -1, 11, 11, 11, 11,

	10, 10, 10, 10,  9,  9,  9,  9,

};



static void *intc_baseaddr;



#define IPR ((unsigned long)intc_baseaddr + 6)



static void h8300h_disable_irq(struct irq_data *data)

{

	int bit;

	int irq = data->irq - 12;



	bit = ipr_bit[irq];

	if (bit >= 0) {

		if (bit < 8)

			ctrl_bclr(bit & 7, IPR);

		else

			ctrl_bclr(bit & 7, (IPR+1));

	}

}



static void h8300h_enable_irq(struct irq_data *data)

{

	int bit;

	int irq = data->irq - 12;



	bit = ipr_bit[irq];

	if (bit >= 0) {

		if (bit < 8)

			ctrl_bset(bit & 7, IPR);

		else

			ctrl_bset(bit & 7, (IPR+1));

	}

}



struct irq_chip h8300h_irq_chip = {

	.name		= "H8/300H-INTC",

	.irq_enable	= h8300h_enable_irq,

	.irq_disable	= h8300h_disable_irq,

};



static int irq_map(struct irq_domain *h, unsigned int virq,

		   irq_hw_number_t hw_irq_num)

{

       irq_set_chip_and_handler(virq, &h8300h_irq_chip, handle_simple_irq);



       return 0;

}



static struct irq_domain_ops irq_ops = {

       .map    = irq_map,

       .xlate  = irq_domain_xlate_onecell,

};



static int __init h8300h_intc_of_init(struct device_node *intc,

				      struct device_node *parent)

{

	struct irq_domain *domain;



	intc_baseaddr = of_iomap(intc, 0);

	BUG_ON(!intc_baseaddr);



	/* All interrupt priority low */

	ctrl_outb(0x00, IPR + 0);

	ctrl_outb(0x00, IPR + 1);



	domain = irq_domain_add_linear(intc, NR_IRQS, &irq_ops, NULL);

	BUG_ON(!domain);

	irq_set_default_host(domain);

	return 0;

}



IRQCHIP_DECLARE(h8300h_intc, "renesas,h8300h-intc", h8300h_intc_of_init);