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Linus Torvalds1da177e2005-04-16 15:20:36 -07001 /*
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#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>
Al Viro2850bc22006-10-07 14:16:45 +010018#include <asm/irq_regs.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/seq_file.h>
20
21extern void sun3_leds (unsigned char);
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
23void sun3_disable_interrupts(void)
24{
25 sun3_disable_irq(0);
26}
27
28void sun3_enable_interrupts(void)
29{
30 sun3_enable_irq(0);
31}
32
Adrian Bunk07b81252008-07-17 21:16:27 +020033static int led_pattern[8] = {
Linus Torvalds1da177e2005-04-16 15:20:36 -070034 ~(0x80), ~(0x01),
35 ~(0x40), ~(0x02),
36 ~(0x20), ~(0x04),
37 ~(0x10), ~(0x08)
38};
39
40volatile unsigned char* sun3_intreg;
41
Linus Torvalds1da177e2005-04-16 15:20:36 -070042void sun3_enable_irq(unsigned int irq)
43{
Roman Zippelebba61d2006-06-25 05:47:05 -070044 *sun3_intreg |= (1 << irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070045}
46
47void sun3_disable_irq(unsigned int irq)
48{
Roman Zippelebba61d2006-06-25 05:47:05 -070049 *sun3_intreg &= ~(1 << irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050}
51
Al Viro2850bc22006-10-07 14:16:45 +010052static irqreturn_t sun3_int7(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070053{
Roman Zippelebba61d2006-06-25 05:47:05 -070054 *sun3_intreg |= (1 << irq);
55 if (!(kstat_cpu(0).irqs[irq] % 2000))
56 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070057 return IRQ_HANDLED;
58}
59
Al Viro2850bc22006-10-07 14:16:45 +010060static irqreturn_t sun3_int5(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
Linus Torvalds1da177e2005-04-16 15:20:36 -070062#ifdef CONFIG_SUN3
63 intersil_clear();
64#endif
Roman Zippelebba61d2006-06-25 05:47:05 -070065 *sun3_intreg |= (1 << irq);
Linus Torvalds1da177e2005-04-16 15:20:36 -070066#ifdef CONFIG_SUN3
67 intersil_clear();
68#endif
Torben Hohne53f2762011-01-27 16:00:06 +010069 xtime_update(1);
Al Viro2850bc22006-10-07 14:16:45 +010070 update_process_times(user_mode(get_irq_regs()));
Roman Zippelebba61d2006-06-25 05:47:05 -070071 if (!(kstat_cpu(0).irqs[irq] % 20))
72 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
Linus Torvalds1da177e2005-04-16 15:20:36 -070073 return IRQ_HANDLED;
74}
75
Al Viro2850bc22006-10-07 14:16:45 +010076static irqreturn_t sun3_vec255(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -070077{
78// intersil_clear();
79 return IRQ_HANDLED;
80}
81
Roman Zippelebba61d2006-06-25 05:47:05 -070082static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
83{
84 *sun3_intreg &= ~(1 << irq);
85
Geert Uytterhoeven1425df82011-07-01 20:39:19 +020086 do_IRQ(irq, fp);
Roman Zippelebba61d2006-06-25 05:47:05 -070087}
88
Geert Uytterhoevene8abf5e2011-04-17 22:53:04 +020089static void sun3_irq_enable(struct irq_data *data)
90{
91 sun3_enable_irq(data->irq);
92};
93
94static void sun3_irq_disable(struct irq_data *data)
95{
96 sun3_disable_irq(data->irq);
97};
98
Geert Uytterhoevenc288bf22011-04-13 22:31:28 +020099static struct irq_chip sun3_irq_chip = {
Roman Zippelebba61d2006-06-25 05:47:05 -0700100 .name = "sun3",
Geert Uytterhoevenc288bf22011-04-13 22:31:28 +0200101 .irq_startup = m68k_irq_startup,
102 .irq_shutdown = m68k_irq_shutdown,
Geert Uytterhoevene8abf5e2011-04-17 22:53:04 +0200103 .irq_enable = sun3_irq_enable,
104 .irq_disable = sun3_irq_disable,
Roman Zippelebba61d2006-06-25 05:47:05 -0700105};
106
Al Viro66a3f822007-07-20 04:33:28 +0100107void __init sun3_init_IRQ(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 *sun3_intreg = 1;
110
Roman Zippelebba61d2006-06-25 05:47:05 -0700111 m68k_setup_auto_interrupt(sun3_inthandle);
Geert Uytterhoevenedb34722011-06-01 11:15:21 +0200112 m68k_setup_irq_controller(&sun3_irq_chip, handle_simple_irq,
113 IRQ_AUTO_1, 7);
Sam Creasey35bdd522007-05-01 22:32:47 +0200114 m68k_setup_user_interrupt(VEC_USER, 128, NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115
Geert Uytterhoeven07e449b2008-12-30 14:05:24 +0100116 if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL))
117 pr_err("Couldn't register %s interrupt\n", "int5");
118 if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL))
119 pr_err("Couldn't register %s interrupt\n", "int7");
120 if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
121 pr_err("Couldn't register %s interrupt\n", "vec255");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122}