[mirror_ubuntu-artful-kernel.git] / arch / m68k / sun3 / sun3ints.c

 /*
 * linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
 *
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file COPYING in the main directory of this archive
 * for more details.
 */

#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/kernel_stat.h>
#include <linux/interrupt.h>
#include <asm/segment.h>
#include <asm/intersil.h>
#include <asm/oplib.h>
#include <asm/sun3ints.h>
#include <asm/irq_regs.h>
#include <linux/seq_file.h>

extern void sun3_leds (unsigned char);

void sun3_disable_interrupts(void)
{
	sun3_disable_irq(0);
}

void sun3_enable_interrupts(void)
{
	sun3_enable_irq(0);
}

static int led_pattern[8] = {
       ~(0x80), ~(0x01),
       ~(0x40), ~(0x02),
       ~(0x20), ~(0x04),
       ~(0x10), ~(0x08)
};

volatile unsigned char* sun3_intreg;

void sun3_enable_irq(unsigned int irq)
{
	*sun3_intreg |=  (1 << irq);
}

void sun3_disable_irq(unsigned int irq)
{
	*sun3_intreg &= ~(1 << irq);
}

static irqreturn_t sun3_int7(int irq, void *dev_id)
{
	unsigned int cnt;

	cnt = kstat_irqs_cpu(irq, 0);
	if (!(cnt % 2000))
		sun3_leds(led_pattern[cnt % 16000 / 2000]);
	return IRQ_HANDLED;
}

static irqreturn_t sun3_int5(int irq, void *dev_id)
{
	unsigned int cnt;

#ifdef CONFIG_SUN3
	intersil_clear();
#endif
	sun3_disable_irq(5);
	sun3_enable_irq(5);
#ifdef CONFIG_SUN3
	intersil_clear();
#endif
	xtime_update(1);
	update_process_times(user_mode(get_irq_regs()));
	cnt = kstat_irqs_cpu(irq, 0);
	if (!(cnt % 20))
		sun3_leds(led_pattern[cnt % 160 / 20]);
	return IRQ_HANDLED;
}

static irqreturn_t sun3_vec255(int irq, void *dev_id)
{
	return IRQ_HANDLED;
}

void __init sun3_init_IRQ(void)
{
	*sun3_intreg = 1;

	m68k_setup_user_interrupt(VEC_USER, 128);

	if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
		pr_err("Couldn't register %s interrupt\n", "int5");
	if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
		pr_err("Couldn't register %s interrupt\n", "int7");
	if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
		pr_err("Couldn't register %s interrupt\n", "vec255");
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
	3	*
	4	* This file is subject to the terms and conditions of the GNU General Public
	5	* License. See the file COPYING in the main directory of this archive
	6	* for more details.
	7	*/
	8
1da177e4 LT	9	#include <linux/types.h>
	10	#include <linux/kernel.h>
	11	#include <linux/sched.h>
	12	#include <linux/kernel_stat.h>
	13	#include <linux/interrupt.h>
	14	#include <asm/segment.h>
	15	#include <asm/intersil.h>
	16	#include <asm/oplib.h>
	17	#include <asm/sun3ints.h>
2850bc27	18	#include <asm/irq_regs.h>
1da177e4 LT	19	#include <linux/seq_file.h>
	20
	21	extern void sun3_leds (unsigned char);
1da177e4 LT	22
	23	void sun3_disable_interrupts(void)
	24	{
	25	sun3_disable_irq(0);
	26	}
	27
	28	void sun3_enable_interrupts(void)
	29	{
	30	sun3_enable_irq(0);
	31	}
	32
07b81259	33	static int led_pattern[8] = {
1da177e4 LT	34	~(0x80), ~(0x01),
	35	~(0x40), ~(0x02),
	36	~(0x20), ~(0x04),
	37	~(0x10), ~(0x08)
	38	};
	39
	40	volatile unsigned char* sun3_intreg;
	41
1da177e4 LT	42	void sun3_enable_irq(unsigned int irq)
1da177e4 LT	43	{
ebba61d5	44	*sun3_intreg \|= (1 << irq);
1da177e4 LT	45	}
	46
	47	void sun3_disable_irq(unsigned int irq)
	48	{
ebba61d5	49	*sun3_intreg &= ~(1 << irq);
1da177e4 LT	50	}
1da177e4 LT	51
2850bc27	52	static irqreturn_t sun3_int7(int irq, void *dev_id)
1da177e4	53	{
40455132 GU	54	unsigned int cnt;
40455132 GU	55
40455132 GU	56	cnt = kstat_irqs_cpu(irq, 0);
	57	if (!(cnt % 2000))
	58	sun3_leds(led_pattern[cnt % 16000 / 2000]);
1da177e4 LT	59	return IRQ_HANDLED;
	60	}
	61
2850bc27	62	static irqreturn_t sun3_int5(int irq, void *dev_id)
1da177e4	63	{
40455132 GU	64	unsigned int cnt;
40455132 GU	65
1da177e4 LT	66	#ifdef CONFIG_SUN3
	67	intersil_clear();
	68	#endif
7f88d2c0 TB	69	sun3_disable_irq(5);
7f88d2c0 TB	70	sun3_enable_irq(5);
1da177e4 LT	71	#ifdef CONFIG_SUN3
	72	intersil_clear();
	73	#endif
e53f276b	74	xtime_update(1);
2850bc27	75	update_process_times(user_mode(get_irq_regs()));
40455132 GU	76	cnt = kstat_irqs_cpu(irq, 0);
	77	if (!(cnt % 20))
	78	sun3_leds(led_pattern[cnt % 160 / 20]);
1da177e4 LT	79	return IRQ_HANDLED;
	80	}
	81
2850bc27	82	static irqreturn_t sun3_vec255(int irq, void *dev_id)
1da177e4	83	{
1da177e4 LT	84	return IRQ_HANDLED;
	85	}
	86
66a3f820	87	void __init sun3_init_IRQ(void)
1da177e4	88	{
ebba61d5	89	*sun3_intreg = 1;
1da177e4	90
f30a6484	91	m68k_setup_user_interrupt(VEC_USER, 128);
1da177e4	92
7f88d2c0	93	if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL))
07e449b5	94	pr_err("Couldn't register %s interrupt\n", "int5");
7f88d2c0	95	if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL))
07e449b5 GU	96	pr_err("Couldn't register %s interrupt\n", "int7");
	97	if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
	98	pr_err("Couldn't register %s interrupt\n", "vec255");
1da177e4	99	}