20461278e5351085342627923b5a6493f839c2b3
[linux-3.10.git] / arch / m68k / sun3 / sun3ints.c
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
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>
18 #include <asm/irq_regs.h>
19 #include <linux/seq_file.h>
20
21 extern void sun3_leds (unsigned char);
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
33 static int led_pattern[8] = {
34        ~(0x80), ~(0x01),
35        ~(0x40), ~(0x02),
36        ~(0x20), ~(0x04),
37        ~(0x10), ~(0x08)
38 };
39
40 volatile unsigned char* sun3_intreg;
41
42 void sun3_enable_irq(unsigned int irq)
43 {
44         *sun3_intreg |=  (1 << irq);
45 }
46
47 void sun3_disable_irq(unsigned int irq)
48 {
49         *sun3_intreg &= ~(1 << irq);
50 }
51
52 static irqreturn_t sun3_int7(int irq, void *dev_id)
53 {
54         *sun3_intreg |=  (1 << irq);
55         if (!(kstat_cpu(0).irqs[irq] % 2000))
56                 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 16000) / 2000]);
57         return IRQ_HANDLED;
58 }
59
60 static irqreturn_t sun3_int5(int irq, void *dev_id)
61 {
62 #ifdef CONFIG_SUN3
63         intersil_clear();
64 #endif
65         *sun3_intreg |=  (1 << irq);
66 #ifdef CONFIG_SUN3
67         intersil_clear();
68 #endif
69         xtime_update(1);
70         update_process_times(user_mode(get_irq_regs()));
71         if (!(kstat_cpu(0).irqs[irq] % 20))
72                 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
73         return IRQ_HANDLED;
74 }
75
76 static irqreturn_t sun3_vec255(int irq, void *dev_id)
77 {
78 //      intersil_clear();
79         return IRQ_HANDLED;
80 }
81
82 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
83 {
84         *sun3_intreg &= ~(1 << irq);
85
86         __m68k_handle_int(irq, fp);
87 }
88
89 static void sun3_irq_enable(struct irq_data *data)
90 {
91     sun3_enable_irq(data->irq);
92 };
93
94 static void sun3_irq_disable(struct irq_data *data)
95 {
96     sun3_disable_irq(data->irq);
97 };
98
99 static struct irq_chip sun3_irq_chip = {
100         .name           = "sun3",
101         .irq_startup    = m68k_irq_startup,
102         .irq_shutdown   = m68k_irq_shutdown,
103         .irq_enable     = sun3_irq_enable,
104         .irq_disable    = sun3_irq_disable,
105 };
106
107 void __init sun3_init_IRQ(void)
108 {
109         *sun3_intreg = 1;
110
111         m68k_setup_auto_interrupt(sun3_inthandle);
112         m68k_setup_irq_controller(&sun3_irq_chip, handle_simple_irq,
113                                   IRQ_AUTO_1, 7);
114         m68k_setup_user_interrupt(VEC_USER, 128, NULL);
115
116         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");
122 }