LXR linux/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
  21extern void sun3_leds (unsigned char);
  22
  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
  33static int led_pattern[8] = {
  34       ~(0x80), ~(0x01),
  35       ~(0x40), ~(0x02),
  36       ~(0x20), ~(0x04),
  37       ~(0x10), ~(0x08)
  38};
  39
  40volatile unsigned char* sun3_intreg;
  41
  42void sun3_enable_irq(unsigned int irq)
  43{
  44        *sun3_intreg |=  (1 << irq);
  45}
  46
  47void sun3_disable_irq(unsigned int irq)
  48{
  49        *sun3_intreg &= ~(1 << irq);
  50}
  51
  52static 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
  60static 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
  78static irqreturn_t sun3_vec255(int irq, void *dev_id)
  79{
  80//      intersil_clear();
  81        return IRQ_HANDLED;
  82}
  83
  84static 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
  91static 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
 100void __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        if (request_irq(IRQ_AUTO_5, sun3_int5, 0, "int5", NULL))
 109                pr_err("Couldn't register %s interrupt\n", "int5");
 110        if (request_irq(IRQ_AUTO_7, sun3_int7, 0, "int7", NULL))
 111                pr_err("Couldn't register %s interrupt\n", "int7");
 112        if (request_irq(IRQ_USER+127, sun3_vec255, 0, "vec255", NULL))
 113                pr_err("Couldn't register %s interrupt\n", "vec255");
 114}
 115