arch/mn10300/unit-asb2364/unit-init.c

   1 /* ASB2364 initialisation
   2  *
   3  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
   4  * Written by David Howells (dhowells@redhat.com)
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  */
  11
  12 #include <linux/kernel.h>
  13 #include <linux/param.h>
  14 #include <linux/init.h>
  15 #include <linux/device.h>
  16 #include <linux/delay.h>
  17
  18 #include <asm/io.h>
  19 #include <asm/setup.h>
  20 #include <asm/processor.h>
  21 #include <asm/irq.h>
  22 #include <asm/intctl-regs.h>
  23 #include <unit/fpga-regs.h>
  24
  25 /*
  26  * initialise some of the unit hardware before gdbstub is set up
  27  */
  28 asmlinkage void __init unit_init(void)
  29 {
  30         /* set up the external interrupts */
  31
  32         /* XIRQ[0]: NAND RXBY */
  33         /* SET_XIRQ_TRIGGER(0, XIRQ_TRIGGER_LOWLEVEL); */
  34
  35         /* XIRQ[1]: LAN, UART, I2C, USB, PCI, FPGA */
  36         SET_XIRQ_TRIGGER(1, XIRQ_TRIGGER_LOWLEVEL);
  37
  38         /* XIRQ[2]: Extend Slot 1-9 */
  39         /* SET_XIRQ_TRIGGER(2, XIRQ_TRIGGER_LOWLEVEL); */
  40
  41 #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL) &&     \
  42     defined(CONFIG_ETHERNET_IRQ_LEVEL) &&       \
  43     (CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL)
  44 # error CONFIG_EXT_SERIAL_IRQ_LEVEL != CONFIG_ETHERNET_IRQ_LEVEL
  45 #endif
  46
  47 #if defined(CONFIG_EXT_SERIAL_IRQ_LEVEL)
  48         set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_EXT_SERIAL_IRQ_LEVEL));
  49 #elif defined(CONFIG_ETHERNET_IRQ_LEVEL)
  50         set_intr_level(XIRQ1, NUM2GxICR_LEVEL(CONFIG_ETHERNET_IRQ_LEVEL));
  51 #endif
  52 }
  53
  54 /*
  55  * initialise the rest of the unit hardware after gdbstub is ready
  56  */
  57 asmlinkage void __init unit_setup(void)
  58 {
  59
  60 }
  61
  62 /*
  63  * initialise the external interrupts used by a unit of this type
  64  */
  65 void __init unit_init_IRQ(void)
  66 {
  67         unsigned int extnum;
  68
  69         for (extnum = 0 ; extnum < NR_XIRQS ; extnum++) {
  70                 switch (GET_XIRQ_TRIGGER(extnum)) {
  71                         /* LEVEL triggered interrupts should be made
  72                          * post-ACK'able as they hold their lines until
  73                          * serviced
  74                          */
  75                 case XIRQ_TRIGGER_HILEVEL:
  76                 case XIRQ_TRIGGER_LOWLEVEL:
  77                         mn10300_set_lateack_irq_type(XIRQ2IRQ(extnum));
  78                         break;
  79                 default:
  80                         break;
  81                 }
  82         }
  83
  84 #define IRQCTL  __SYSREG(0xd5000090, u32)
  85         IRQCTL |= 0x02;
  86
  87         irq_fpga_init();
  88 }