m68k/sun3/: possible cleanups
[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         do_timer(1);
70 #ifndef CONFIG_SMP
71         update_process_times(user_mode(get_irq_regs()));
72 #endif
73         if (!(kstat_cpu(0).irqs[irq] % 20))
74                 sun3_leds(led_pattern[(kstat_cpu(0).irqs[irq] % 160) / 20]);
75         return IRQ_HANDLED;
76 }
77
78 static irqreturn_t sun3_vec255(int irq, void *dev_id)
79 {
80 //      intersil_clear();
81         return IRQ_HANDLED;
82 }
83
84 static void sun3_inthandle(unsigned int irq, struct pt_regs *fp)
85 {
86         *sun3_intreg &= ~(1 << irq);
87
88         __m68k_handle_int(irq, fp);
89 }
90
91 static struct irq_controller sun3_irq_controller = {
92         .name           = "sun3",
93         .lock           = __SPIN_LOCK_UNLOCKED(sun3_irq_controller.lock),
94         .startup        = m68k_irq_startup,
95         .shutdown       = m68k_irq_shutdown,
96         .enable         = sun3_enable_irq,
97         .disable        = sun3_disable_irq,
98 };
99
100 void __init sun3_init_IRQ(void)
101 {
102         *sun3_intreg = 1;
103
104         m68k_setup_auto_interrupt(sun3_inthandle);
105         m68k_setup_irq_controller(&sun3_irq_controller, IRQ_AUTO_1, 7);
106         m68k_setup_user_interrupt(VEC_USER, 128, NULL);
107
108         request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL);
109         request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL);
110         request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL);
111 }