arch/sh/boards/mach-r2d/irq.c

   1 /*
   2  * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
   3  *
   4  * Copyright (C) 2007  Magnus Damm
   5  * Copyright (C) 2000  Kazumoto Kojima
   6  *
   7  * Renesas Technology Sales RTS7751R2D Support, R2D-PLUS and R2D-1.
   8  *
   9  * Modified for RTS7751R2D by
  10  * Atom Create Engineering Co., Ltd. 2002.
  11  */
  12 #include <linux/init.h>
  13 #include <linux/irq.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/io.h>
  16 #include <mach/r2d.h>
  17
  18 #define R2D_NR_IRL 13
  19
  20 enum {
  21         UNUSED = 0,
  22
  23         /* board specific interrupt sources (R2D-1 and R2D-PLUS) */
  24         EXT,              /* EXT_INT0-3 */
  25         RTC_T, RTC_A,     /* Real Time Clock */
  26         AX88796,          /* Ethernet controller (R2D-1 board) */
  27         KEY,              /* Key input (R2D-PLUS board) */
  28         SDCARD,           /* SD Card */
  29         CF_CD, CF_IDE,    /* CF Card Detect + CF IDE */
  30         SM501,            /* SM501 aka Voyager */
  31         PCI_INTD_RTL8139, /* Ethernet controller */
  32         PCI_INTC_PCI1520, /* Cardbus/PCMCIA bridge */
  33         PCI_INTB_RTL8139, /* Ethernet controller with HUB (R2D-PLUS board) */
  34         PCI_INTB_SLOT,    /* PCI Slot 3.3v (R2D-1 board) */
  35         PCI_INTA_SLOT,    /* PCI Slot 3.3v */
  36         TP,               /* Touch Panel */
  37 };
  38
  39 #ifdef CONFIG_RTS7751R2D_1
  40
  41 /* Vectors for R2D-1 */
  42 static struct intc_vect vectors_r2d_1[] __initdata = {
  43         INTC_IRQ(EXT, IRQ_EXT),
  44         INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
  45         INTC_IRQ(AX88796, IRQ_AX88796), INTC_IRQ(SDCARD, IRQ_SDCARD),
  46         INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE), /* ng */
  47         INTC_IRQ(SM501, IRQ_VOYAGER),
  48         INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
  49         INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
  50         INTC_IRQ(PCI_INTB_SLOT, IRQ_PCI_INTB),
  51         INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
  52         INTC_IRQ(TP, IRQ_TP),
  53 };
  54
  55 /* IRLMSK mask register layout for R2D-1 */
  56 static struct intc_mask_reg mask_registers_r2d_1[] __initdata = {
  57         { 0xa4000000, 0, 16, /* IRLMSK */
  58           { TP, PCI_INTA_SLOT, PCI_INTB_SLOT,
  59             PCI_INTC_PCI1520, PCI_INTD_RTL8139,
  60             SM501, CF_IDE, CF_CD, SDCARD, AX88796,
  61             RTC_A, RTC_T, 0, 0, 0, EXT } },
  62 };
  63
  64 /* IRLn to IRQ table for R2D-1 */
  65 static unsigned char irl2irq_r2d_1[R2D_NR_IRL] __initdata = {
  66         IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
  67         IRQ_VOYAGER, IRQ_AX88796, IRQ_RTC_A, IRQ_RTC_T,
  68         IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
  69         IRQ_TP,
  70 };
  71
  72 static DECLARE_INTC_DESC(intc_desc_r2d_1, "r2d-1", vectors_r2d_1,
  73                          NULL, mask_registers_r2d_1, NULL, NULL);
  74
  75 #endif /* CONFIG_RTS7751R2D_1 */
  76
  77 #ifdef CONFIG_RTS7751R2D_PLUS
  78
  79 /* Vectors for R2D-PLUS */
  80 static struct intc_vect vectors_r2d_plus[] __initdata = {
  81         INTC_IRQ(EXT, IRQ_EXT),
  82         INTC_IRQ(RTC_T, IRQ_RTC_T), INTC_IRQ(RTC_A, IRQ_RTC_A),
  83         INTC_IRQ(KEY, IRQ_KEY), INTC_IRQ(SDCARD, IRQ_SDCARD),
  84         INTC_IRQ(CF_CD, IRQ_CF_CD), INTC_IRQ(CF_IDE, IRQ_CF_IDE),
  85         INTC_IRQ(SM501, IRQ_VOYAGER),
  86         INTC_IRQ(PCI_INTD_RTL8139, IRQ_PCI_INTD),
  87         INTC_IRQ(PCI_INTC_PCI1520, IRQ_PCI_INTC),
  88         INTC_IRQ(PCI_INTB_RTL8139, IRQ_PCI_INTB),
  89         INTC_IRQ(PCI_INTA_SLOT, IRQ_PCI_INTA),
  90         INTC_IRQ(TP, IRQ_TP),
  91 };
  92
  93 /* IRLMSK mask register layout for R2D-PLUS */
  94 static struct intc_mask_reg mask_registers_r2d_plus[] __initdata = {
  95         { 0xa4000000, 0, 16, /* IRLMSK */
  96           { TP, PCI_INTA_SLOT, PCI_INTB_RTL8139,
  97             PCI_INTC_PCI1520, PCI_INTD_RTL8139,
  98             SM501, CF_IDE, CF_CD, SDCARD, KEY,
  99             RTC_A, RTC_T, 0, 0, 0, EXT } },
 100 };
 101
 102 /* IRLn to IRQ table for R2D-PLUS */
 103 static unsigned char irl2irq_r2d_plus[R2D_NR_IRL] __initdata = {
 104         IRQ_PCI_INTD, IRQ_CF_IDE, IRQ_CF_CD, IRQ_PCI_INTC,
 105         IRQ_VOYAGER, IRQ_KEY, IRQ_RTC_A, IRQ_RTC_T,
 106         IRQ_SDCARD, IRQ_PCI_INTA, IRQ_PCI_INTB, IRQ_EXT,
 107         IRQ_TP,
 108 };
 109
 110 static DECLARE_INTC_DESC(intc_desc_r2d_plus, "r2d-plus", vectors_r2d_plus,
 111                          NULL, mask_registers_r2d_plus, NULL, NULL);
 112
 113 #endif /* CONFIG_RTS7751R2D_PLUS */
 114
 115 static unsigned char irl2irq[R2D_NR_IRL];
 116
 117 int rts7751r2d_irq_demux(int irq)
 118 {
 119         if (irq >= R2D_NR_IRL || irq < 0 || !irl2irq[irq])
 120                 return irq;
 121
 122         return irl2irq[irq];
 123 }
 124
 125 /*
 126  * Initialize IRQ setting
 127  */
 128 void __init init_rts7751r2d_IRQ(void)
 129 {
 130         struct intc_desc *d;
 131
 132         switch (__raw_readw(PA_VERREG) & 0xf0) {
 133 #ifdef CONFIG_RTS7751R2D_PLUS
 134         case 0x10:
 135                 printk(KERN_INFO "Using R2D-PLUS interrupt controller.\n");
 136                 d = &intc_desc_r2d_plus;
 137                 memcpy(irl2irq, irl2irq_r2d_plus, R2D_NR_IRL);
 138                 break;
 139 #endif
 140 #ifdef CONFIG_RTS7751R2D_1
 141         case 0x00: /* according to manual */
 142         case 0x30: /* in reality */
 143                 printk(KERN_INFO "Using R2D-1 interrupt controller.\n");
 144                 d = &intc_desc_r2d_1;
 145                 memcpy(irl2irq, irl2irq_r2d_1, R2D_NR_IRL);
 146                 break;
 147 #endif
 148         default:
 149                 printk(KERN_INFO "Unknown R2D interrupt controller 0x%04x\n",
 150                        __raw_readw(PA_VERREG));
 151                 return;
 152         }
 153
 154         register_intc_controller(d);
 155 }