arch/sh/boards/renesas/rts7751r2d/irq.c

   1 /*
   2  * linux/arch/sh/boards/renesas/rts7751r2d/irq.c
   3  *
   4  * Copyright (C) 2000  Kazumoto Kojima
   5  *
   6  * Renesas Technology Sales RTS7751R2D Support.
   7  *
   8  * Modified for RTS7751R2D by
   9  * Atom Create Engineering Co., Ltd. 2002.
  10  */
  11 #include <linux/init.h>
  12 #include <linux/interrupt.h>
  13 #include <linux/irq.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/io.h>
  16 #include <asm/rts7751r2d.h>
  17
  18 #if defined(CONFIG_RTS7751R2D_REV11)
  19 static int mask_pos[] = {11, 9, 8, 12, 10, 6, 5, 4, 7, 14, 13, 0, 0, 0, 0};
  20 #else
  21 static int mask_pos[] = {6, 11, 9, 8, 12, 10, 5, 4, 7, 14, 13, 0, 0, 0, 0};
  22 #endif
  23
  24 extern int voyagergx_irq_demux(int irq);
  25 extern void setup_voyagergx_irq(void);
  26
  27 static void enable_rts7751r2d_irq(unsigned int irq)
  28 {
  29         /* Set priority in IPR back to original value */
  30         ctrl_outw(ctrl_inw(IRLCNTR1) | (1 << mask_pos[irq]), IRLCNTR1);
  31 }
  32
  33 static void disable_rts7751r2d_irq(unsigned int irq)
  34 {
  35         /* Set the priority in IPR to 0 */
  36         ctrl_outw(ctrl_inw(IRLCNTR1) & (0xffff ^ (1 << mask_pos[irq])),
  37                   IRLCNTR1);
  38 }
  39
  40 int rts7751r2d_irq_demux(int irq)
  41 {
  42         return voyagergx_irq_demux(irq);
  43 }
  44
  45 static struct irq_chip rts7751r2d_irq_chip __read_mostly = {
  46         .name           = "rts7751r2d",
  47         .mask           = disable_rts7751r2d_irq,
  48         .unmask         = enable_rts7751r2d_irq,
  49         .mask_ack       = disable_rts7751r2d_irq,
  50 };
  51
  52 /*
  53  * Initialize IRQ setting
  54  */
  55 void __init init_rts7751r2d_IRQ(void)
  56 {
  57         int i;
  58
  59         /* IRL0=KEY Input
  60          * IRL1=Ethernet
  61          * IRL2=CF Card
  62          * IRL3=CF Card Insert
  63          * IRL4=PCMCIA
  64          * IRL5=VOYAGER
  65          * IRL6=RTC Alarm
  66          * IRL7=RTC Timer
  67          * IRL8=SD Card
  68          * IRL9=PCI Slot #1
  69          * IRL10=PCI Slot #2
  70          * IRL11=Extention #0
  71          * IRL12=Extention #1
  72          * IRL13=Extention #2
  73          * IRL14=Extention #3
  74          */
  75
  76         for (i=0; i<15; i++) {
  77                 disable_irq_nosync(i);
  78                 set_irq_chip_and_handler_name(i, &rts7751r2d_irq_chip,
  79                                               handle_level_irq, "level");
  80                 enable_rts7751r2d_irq(i);
  81         }
  82
  83         setup_voyagergx_irq();
  84 }