| | 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/intersil.h> |
| | 15 | #include <asm/oplib.h> |
| | 16 | #include <asm/sun3ints.h> |
| | 17 | #include <asm/irq_regs.h> |
| | 18 | #include <linux/seq_file.h> |
| | 19 | |
| | 20 | #include "sun3.h" |
| | 21 | |
| | 22 | void sun3_disable_interrupts(void) |
| | 23 | { |
| | 24 | sun3_disable_irq(0); |
| | 25 | } |
| | 26 | |
| | 27 | void sun3_enable_interrupts(void) |
| | 28 | { |
| | 29 | sun3_enable_irq(0); |
| | 30 | } |
| | 31 | |
| | 32 | static unsigned char led_pattern[8] = { |
| | 33 | (u8)~(0x80), (u8)~(0x01), |
| | 34 | (u8)~(0x40), (u8)~(0x02), |
| | 35 | (u8)~(0x20), (u8)~(0x04), |
| | 36 | (u8)~(0x10), (u8)~(0x08) |
| | 37 | }; |
| | 38 | |
| | 39 | volatile unsigned char* sun3_intreg; |
| | 40 | |
| | 41 | void sun3_enable_irq(unsigned int irq) |
| | 42 | { |
| | 43 | *sun3_intreg |= (1 << irq); |
| | 44 | } |
| | 45 | |
| | 46 | void sun3_disable_irq(unsigned int irq) |
| | 47 | { |
| | 48 | *sun3_intreg &= ~(1 << irq); |
| | 49 | } |
| | 50 | |
| | 51 | static irqreturn_t sun3_int7(int irq, void *dev_id) |
| | 52 | { |
| | 53 | unsigned int cnt; |
| | 54 | |
| | 55 | cnt = kstat_irqs_cpu(irq, 0); |
| | 56 | if (!(cnt % 2000)) |
| | 57 | sun3_leds(led_pattern[cnt % 16000 / 2000]); |
| | 58 | return IRQ_HANDLED; |
| | 59 | } |
| | 60 | |
| | 61 | static irqreturn_t sun3_int5(int irq, void *dev_id) |
| | 62 | { |
| | 63 | unsigned long flags; |
| | 64 | unsigned int cnt; |
| | 65 | |
| | 66 | local_irq_save(flags); |
| | 67 | #ifdef CONFIG_SUN3 |
| | 68 | intersil_clear(); |
| | 69 | #endif |
| | 70 | sun3_disable_irq(5); |
| | 71 | sun3_enable_irq(5); |
| | 72 | #ifdef CONFIG_SUN3 |
| | 73 | intersil_clear(); |
| | 74 | #endif |
| | 75 | legacy_timer_tick(1); |
| | 76 | cnt = kstat_irqs_cpu(irq, 0); |
| | 77 | if (!(cnt % 20)) |
| | 78 | sun3_leds(led_pattern[cnt % 160 / 20]); |
| | 79 | local_irq_restore(flags); |
| | 80 | return IRQ_HANDLED; |
| | 81 | } |
| | 82 | |
| | 83 | static irqreturn_t sun3_vec255(int irq, void *dev_id) |
| | 84 | { |
| | 85 | return IRQ_HANDLED; |
| | 86 | } |
| | 87 | |
| | 88 | void __init sun3_init_IRQ(void) |
| | 89 | { |
| | 90 | *sun3_intreg = 1; |
| | 91 | |
| | 92 | m68k_setup_user_interrupt(VEC_USER, 128); |
| | 93 | |
| | 94 | if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "clock", NULL)) |
| | 95 | pr_err("Couldn't register %s interrupt\n", "int5"); |
| | 96 | if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "nmi", NULL)) |
| | 97 | pr_err("Couldn't register %s interrupt\n", "int7"); |
| | 98 | if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL)) |
| | 99 | pr_err("Couldn't register %s interrupt\n", "vec255"); |
| | 100 | } |
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