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