hw/arm/digic.c

   1 /*
   2  * QEMU model of the Canon DIGIC SoC.
   3  *
   4  * Copyright (C) 2013 Antony Pavlov <antonynpavlov@gmail.com>
   5  *
   6  * This model is based on reverse engineering efforts
   7  * made by CHDK (http://chdk.wikia.com) and
   8  * Magic Lantern (http://www.magiclantern.fm) projects
   9  * contributors.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  19  * GNU General Public License for more details.
  20  *
  21  */
  22
  23 #include "qemu/osdep.h"
  24 #include "qapi/error.h"
  25 #include "qemu/module.h"
  26 #include "hw/arm/digic.h"
  27 #include "hw/qdev-properties.h"
  28 #include "sysemu/sysemu.h"
  29
  30 #define DIGIC4_TIMER_BASE(n)    (0xc0210000 + (n) * 0x100)
  31
  32 #define DIGIC_UART_BASE          0xc0800000
  33
  34 static void digic_init(Object *obj)
  35 {
  36     DigicState *s = DIGIC(obj);
  37     int i;
  38
  39     object_initialize_child(obj, "cpu", &s->cpu, ARM_CPU_TYPE_NAME("arm946"));
  40
  41     for (i = 0; i < DIGIC4_NB_TIMERS; i++) {
  42 #define DIGIC_TIMER_NAME_MLEN    11
  43         char name[DIGIC_TIMER_NAME_MLEN];
  44
  45         snprintf(name, DIGIC_TIMER_NAME_MLEN, "timer[%d]", i);
  46         object_initialize_child(obj, name, &s->timer[i], TYPE_DIGIC_TIMER);
  47     }
  48
  49     object_initialize_child(obj, "uart", &s->uart, TYPE_DIGIC_UART);
  50 }
  51
  52 static void digic_realize(DeviceState *dev, Error **errp)
  53 {
  54     DigicState *s = DIGIC(dev);
  55     SysBusDevice *sbd;
  56     int i;
  57
  58     if (!object_property_set_bool(OBJECT(&s->cpu), "reset-hivecs", true,
  59                                   errp)) {
  60         return;
  61     }
  62
  63     if (!qdev_realize(DEVICE(&s->cpu), NULL, errp)) {
  64         return;
  65     }
  66
  67     for (i = 0; i < DIGIC4_NB_TIMERS; i++) {
  68         if (!sysbus_realize(SYS_BUS_DEVICE(&s->timer[i]), errp)) {
  69             return;
  70         }
  71
  72         sbd = SYS_BUS_DEVICE(&s->timer[i]);
  73         sysbus_mmio_map(sbd, 0, DIGIC4_TIMER_BASE(i));
  74     }
  75
  76     qdev_prop_set_chr(DEVICE(&s->uart), "chardev", serial_hd(0));
  77     if (!sysbus_realize(SYS_BUS_DEVICE(&s->uart), errp)) {
  78         return;
  79     }
  80
  81     sbd = SYS_BUS_DEVICE(&s->uart);
  82     sysbus_mmio_map(sbd, 0, DIGIC_UART_BASE);
  83 }
  84
  85 static void digic_class_init(ObjectClass *oc, void *data)
  86 {
  87     DeviceClass *dc = DEVICE_CLASS(oc);
  88
  89     dc->realize = digic_realize;
  90     /* Reason: Uses serial_hds in the realize function --> not usable twice */
  91     dc->user_creatable = false;
  92 }
  93
  94 static const TypeInfo digic_type_info = {
  95     .name = TYPE_DIGIC,
  96     .parent = TYPE_DEVICE,
  97     .instance_size = sizeof(DigicState),
  98     .instance_init = digic_init,
  99     .class_init = digic_class_init,
 100 };
 101
 102 static void digic_register_types(void)
 103 {
 104     type_register_static(&digic_type_info);
 105 }
 106
 107 type_init(digic_register_types)