ramips: set cp0_perfcount_irq for RT305X
[openwrt/svn-archive/archive.git] / target / linux / ramips / files / arch / mips / ralink / rt305x / irq.c
1 /*
2 * Ralink RT305x SoC specific interrupt handling
3 *
4 * Copyright (C) 2009 Gabor Juhos <juhosg@openwrt.org>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published
8 * by the Free Software Foundation.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/init.h>
13 #include <linux/interrupt.h>
14 #include <linux/irq.h>
15
16 #include <asm/irq_cpu.h>
17 #include <asm/mipsregs.h>
18
19 #include <asm/mach-ralink/common.h>
20 #include <asm/mach-ralink/rt305x.h>
21 #include <asm/mach-ralink/rt305x_regs.h>
22
23 static void rt305x_intc_irq_dispatch(void)
24 {
25 u32 pending;
26
27 pending = ramips_intc_get_status();
28
29 if (pending & RT305X_INTC_INT_TIMER0)
30 do_IRQ(RT305X_INTC_IRQ_TIMER0);
31
32 else if (pending & RT305X_INTC_INT_TIMER1)
33 do_IRQ(RT305X_INTC_IRQ_TIMER1);
34
35 else if (pending & RT305X_INTC_INT_UART0)
36 do_IRQ(RT305X_INTC_IRQ_UART0);
37
38 else if (pending & RT305X_INTC_INT_UART1)
39 do_IRQ(RT305X_INTC_IRQ_UART1);
40
41 else if (pending & RT305X_INTC_INT_PERFC)
42 do_IRQ(RT305X_INTC_IRQ_PERFC);
43
44 else if (pending & RT305X_INTC_INT_OTG)
45 do_IRQ(RT305X_INTC_IRQ_OTG);
46
47 /* TODO: handle PIO interrupts as well */
48
49 else
50 spurious_interrupt();
51 }
52
53 asmlinkage void plat_irq_dispatch(void)
54 {
55 unsigned long pending;
56
57 pending = read_c0_status() & read_c0_cause() & ST0_IM;
58
59 if (pending & STATUSF_IP7)
60 do_IRQ(RT305X_CPU_IRQ_COUNTER);
61
62 else if (pending & STATUSF_IP5)
63 do_IRQ(RT305X_CPU_IRQ_FE);
64
65 else if (pending & STATUSF_IP6)
66 do_IRQ(RT305X_CPU_IRQ_WNIC);
67
68 else if (pending & STATUSF_IP2)
69 rt305x_intc_irq_dispatch();
70
71 else
72 spurious_interrupt();
73 }
74
75 void __init arch_init_irq(void)
76 {
77 mips_cpu_irq_init();
78 ramips_intc_irq_init(RT305X_INTC_BASE, RT305X_CPU_IRQ_INTC,
79 RT305X_INTC_IRQ_BASE);
80
81 cp0_perfcount_irq = RT305X_INTC_IRQ_PERFC;
82 }