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   1 /*
   2  *  linux/arch/m32r/kernel/setup_oaks32r.c
   3  *
   4  *  Setup routines for OAKS32R Board
   5  *
   6  *  Copyright (c) 2002-2005  Hiroyuki Kondo, Hirokazu Takata,
   7  *                           Hitoshi Yamamoto, Mamoru Sakugawa
   8  */
   9
  10 #include <linux/config.h>
  11 #include <linux/irq.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14
  15 #include <asm/system.h>
  16 #include <asm/m32r.h>
  17 #include <asm/io.h>
  18
  19 #define irq2port(x) (M32R_ICU_CR1_PORTL + ((x - 1) * sizeof(unsigned long)))
  20
  21 #ifndef CONFIG_SMP
  22 typedef struct {
  23         unsigned long icucr;  /* ICU Control Register */
  24 } icu_data_t;
  25 #endif /* CONFIG_SMP */
  26
  27 icu_data_t icu_data[NR_IRQS];
  28
  29 static void disable_oaks32r_irq(unsigned int irq)
  30 {
  31         unsigned long port, data;
  32
  33         port = irq2port(irq);
  34         data = icu_data[irq].icucr|M32R_ICUCR_ILEVEL7;
  35         outl(data, port);
  36 }
  37
  38 static void enable_oaks32r_irq(unsigned int irq)
  39 {
  40         unsigned long port, data;
  41
  42         port = irq2port(irq);
  43         data = icu_data[irq].icucr|M32R_ICUCR_IEN|M32R_ICUCR_ILEVEL6;
  44         outl(data, port);
  45 }
  46
  47 static void mask_and_ack_mappi(unsigned int irq)
  48 {
  49         disable_oaks32r_irq(irq);
  50 }
  51
  52 static void end_oaks32r_irq(unsigned int irq)
  53 {
  54         enable_oaks32r_irq(irq);
  55 }
  56
  57 static unsigned int startup_oaks32r_irq(unsigned int irq)
  58 {
  59         enable_oaks32r_irq(irq);
  60         return (0);
  61 }
  62
  63 static void shutdown_oaks32r_irq(unsigned int irq)
  64 {
  65         unsigned long port;
  66
  67         port = irq2port(irq);
  68         outl(M32R_ICUCR_ILEVEL7, port);
  69 }
  70
  71 static struct hw_interrupt_type oaks32r_irq_type =
  72 {
  73         .typename = "OAKS32R-IRQ",
  74         .startup = startup_oaks32r_irq,
  75         .shutdown = shutdown_oaks32r_irq,
  76         .enable = enable_oaks32r_irq,
  77         .disable = disable_oaks32r_irq,
  78         .ack = mask_and_ack_mappi,
  79         .end = end_oaks32r_irq
  80 };
  81
  82 void __init init_IRQ(void)
  83 {
  84         static int once = 0;
  85
  86         if (once)
  87                 return;
  88         else
  89                 once++;
  90
  91 #ifdef CONFIG_NE2000
  92         /* INT3 : LAN controller (RTL8019AS) */
  93         irq_desc[M32R_IRQ_INT3].status = IRQ_DISABLED;
  94         irq_desc[M32R_IRQ_INT3].handler = &oaks32r_irq_type;
  95         irq_desc[M32R_IRQ_INT3].action = 0;
  96         irq_desc[M32R_IRQ_INT3].depth = 1;
  97         icu_data[M32R_IRQ_INT3].icucr = M32R_ICUCR_IEN|M32R_ICUCR_ISMOD10;
  98         disable_oaks32r_irq(M32R_IRQ_INT3);
  99 #endif /* CONFIG_M32R_NE2000 */
 100
 101         /* MFT2 : system timer */
 102         irq_desc[M32R_IRQ_MFT2].status = IRQ_DISABLED;
 103         irq_desc[M32R_IRQ_MFT2].handler = &oaks32r_irq_type;
 104         irq_desc[M32R_IRQ_MFT2].action = 0;
 105         irq_desc[M32R_IRQ_MFT2].depth = 1;
 106         icu_data[M32R_IRQ_MFT2].icucr = M32R_ICUCR_IEN;
 107         disable_oaks32r_irq(M32R_IRQ_MFT2);
 108
 109 #ifdef CONFIG_SERIAL_M32R_SIO
 110         /* SIO0_R : uart receive data */
 111         irq_desc[M32R_IRQ_SIO0_R].status = IRQ_DISABLED;
 112         irq_desc[M32R_IRQ_SIO0_R].handler = &oaks32r_irq_type;
 113         irq_desc[M32R_IRQ_SIO0_R].action = 0;
 114         irq_desc[M32R_IRQ_SIO0_R].depth = 1;
 115         icu_data[M32R_IRQ_SIO0_R].icucr = 0;
 116         disable_oaks32r_irq(M32R_IRQ_SIO0_R);
 117
 118         /* SIO0_S : uart send data */
 119         irq_desc[M32R_IRQ_SIO0_S].status = IRQ_DISABLED;
 120         irq_desc[M32R_IRQ_SIO0_S].handler = &oaks32r_irq_type;
 121         irq_desc[M32R_IRQ_SIO0_S].action = 0;
 122         irq_desc[M32R_IRQ_SIO0_S].depth = 1;
 123         icu_data[M32R_IRQ_SIO0_S].icucr = 0;
 124         disable_oaks32r_irq(M32R_IRQ_SIO0_S);
 125
 126         /* SIO1_R : uart receive data */
 127         irq_desc[M32R_IRQ_SIO1_R].status = IRQ_DISABLED;
 128         irq_desc[M32R_IRQ_SIO1_R].handler = &oaks32r_irq_type;
 129         irq_desc[M32R_IRQ_SIO1_R].action = 0;
 130         irq_desc[M32R_IRQ_SIO1_R].depth = 1;
 131         icu_data[M32R_IRQ_SIO1_R].icucr = 0;
 132         disable_oaks32r_irq(M32R_IRQ_SIO1_R);
 133
 134         /* SIO1_S : uart send data */
 135         irq_desc[M32R_IRQ_SIO1_S].status = IRQ_DISABLED;
 136         irq_desc[M32R_IRQ_SIO1_S].handler = &oaks32r_irq_type;
 137         irq_desc[M32R_IRQ_SIO1_S].action = 0;
 138         irq_desc[M32R_IRQ_SIO1_S].depth = 1;
 139         icu_data[M32R_IRQ_SIO1_S].icucr = 0;
 140         disable_oaks32r_irq(M32R_IRQ_SIO1_S);
 141 #endif /* CONFIG_SERIAL_M32R_SIO */
 142 }