arch/sh/kernel/cpu/sh3/setup-sh3.c

   1 /*
   2  * Shared SH3 Setup code
   3  *
   4  *  Copyright (C) 2008  Magnus Damm
   5  *
   6  * This file is subject to the terms and conditions of the GNU General Public
   7  * License.  See the file "COPYING" in the main directory of this archive
   8  * for more details.
   9  */
  10
  11 #include <linux/init.h>
  12 #include <linux/irq.h>
  13 #include <linux/io.h>
  14
  15 /* All SH3 devices are equipped with IRQ0->5 (except sh7708) */
  16
  17 enum {
  18         UNUSED = 0,
  19
  20         /* interrupt sources */
  21         IRQ0, IRQ1, IRQ2, IRQ3, IRQ4, IRQ5,
  22 };
  23
  24 static struct intc_vect vectors_irq0123[] __initdata = {
  25         INTC_VECT(IRQ0, 0x600), INTC_VECT(IRQ1, 0x620),
  26         INTC_VECT(IRQ2, 0x640), INTC_VECT(IRQ3, 0x660),
  27 };
  28
  29 static struct intc_vect vectors_irq45[] __initdata = {
  30         INTC_VECT(IRQ4, 0x680), INTC_VECT(IRQ5, 0x6a0),
  31 };
  32
  33 static struct intc_prio_reg prio_registers[] __initdata = {
  34         { 0xa4000016, 0, 16, 4, /* IPRC */ { IRQ3, IRQ2, IRQ1, IRQ0 } },
  35         { 0xa4000018, 0, 16, 4, /* IPRD */ { 0, 0, IRQ5, IRQ4 } },
  36 };
  37
  38 static struct intc_mask_reg ack_registers[] __initdata = {
  39         { 0xa4000004, 0, 8, /* IRR0 */
  40           { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } },
  41 };
  42
  43 static struct intc_sense_reg sense_registers[] __initdata = {
  44         { 0xa4000010, 16, 2, { 0, 0, IRQ5, IRQ4, IRQ3, IRQ2, IRQ1, IRQ0 } },
  45 };
  46
  47 static DECLARE_INTC_DESC_ACK(intc_desc_irq0123, "sh3-irq0123",
  48                              vectors_irq0123, NULL, NULL,
  49                              prio_registers, sense_registers, ack_registers);
  50
  51 static DECLARE_INTC_DESC_ACK(intc_desc_irq45, "sh3-irq45",
  52                              vectors_irq45, NULL, NULL,
  53                              prio_registers, sense_registers, ack_registers);
  54
  55 #define INTC_ICR1               0xa4000010UL
  56 #define INTC_ICR1_IRQLVL        (1<<14)
  57
  58 void __init plat_irq_setup_pins(int mode)
  59 {
  60         if (mode == IRQ_MODE_IRQ) {
  61                 ctrl_outw(ctrl_inw(INTC_ICR1) & ~INTC_ICR1_IRQLVL, INTC_ICR1);
  62                 register_intc_controller(&intc_desc_irq0123);
  63                 return;
  64         }
  65         BUG();
  66 }
  67
  68 void __init plat_irq_setup_sh3(void)
  69 {
  70         register_intc_controller(&intc_desc_irq45);
  71 }