LXR linux/arch/mips/dec/tc.c

   1/*
   2 *      TURBOchannel architecture calls.
   3 *
   4 *      Copyright (c) Harald Koerfgen, 1998
   5 *      Copyright (c) 2001, 2003, 2005, 2006  Maciej W. Rozycki
   6 *      Copyright (c) 2005  James Simmons
   7 *
   8 *      This file is subject to the terms and conditions of the GNU
   9 *      General Public License.  See the file "COPYING" in the main
  10 *      directory of this archive for more details.
  11 */
  12#include <linux/compiler.h>
  13#include <linux/errno.h>
  14#include <linux/init.h>
  15#include <linux/string.h>
  16#include <linux/tc.h>
  17#include <linux/types.h>
  18
  19#include <asm/addrspace.h>
  20#include <asm/bootinfo.h>
  21#include <asm/paccess.h>
  22
  23#include <asm/dec/interrupts.h>
  24#include <asm/dec/prom.h>
  25#include <asm/dec/system.h>
  26
  27/*
  28 * Protected read byte from TURBOchannel slot space.
  29 */
  30int tc_preadb(u8 *valp, void __iomem *addr)
  31{
  32        return get_dbe(*valp, (u8 *)addr);
  33}
  34
  35/*
  36 * Get TURBOchannel bus information as specified by the spec, plus
  37 * the slot space base address and the number of slots.
  38 */
  39int __init tc_bus_get_info(struct tc_bus *tbus)
  40{
  41        if (!dec_tc_bus)
  42                return -ENXIO;
  43
  44        memcpy(&tbus->info, rex_gettcinfo(), sizeof(tbus->info));
  45        tbus->slot_base = CPHYSADDR((long)rex_slot_address(0));
  46
  47        switch (mips_machtype) {
  48        case MACH_DS5000_200:
  49                tbus->num_tcslots = 7;
  50                break;
  51        case MACH_DS5000_2X0:
  52        case MACH_DS5900:
  53                tbus->ext_slot_base = 0x20000000;
  54                tbus->ext_slot_size = 0x20000000;
  55                fallthrough;
  56        case MACH_DS5000_1XX:
  57                tbus->num_tcslots = 3;
  58                break;
  59        case MACH_DS5000_XX:
  60                tbus->num_tcslots = 2;
  61        default:
  62                break;
  63        }
  64        return 0;
  65}
  66
  67/*
  68 * Get the IRQ for the specified slot.
  69 */
  70void __init tc_device_get_irq(struct tc_dev *tdev)
  71{
  72        switch (tdev->slot) {
  73        case 0:
  74                tdev->interrupt = dec_interrupt[DEC_IRQ_TC0];
  75                break;
  76        case 1:
  77                tdev->interrupt = dec_interrupt[DEC_IRQ_TC1];
  78                break;
  79        case 2:
  80                tdev->interrupt = dec_interrupt[DEC_IRQ_TC2];
  81                break;
  82        /*
  83         * Yuck! DS5000/200 onboard devices
  84         */
  85        case 5:
  86                tdev->interrupt = dec_interrupt[DEC_IRQ_TC5];
  87                break;
  88        case 6:
  89                tdev->interrupt = dec_interrupt[DEC_IRQ_TC6];
  90                break;
  91        default:
  92                tdev->interrupt = -1;
  93                break;
  94        }
  95}
  96