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 "hw/arm/digic.h"
  26 #include "sysemu/sysemu.h"
  27
  28 #define DIGIC4_TIMER_BASE(n)    (0xc0210000 + (n) * 0x100)
  29
  30 #define DIGIC_UART_BASE          0xc0800000
  31
  32 static void digic_init(Object *obj)
  33 {
  34     DigicState *s = DIGIC(obj);
  35     DeviceState *dev;
  36     int i;
  37
  38     object_initialize(&s->cpu, sizeof(s->cpu), "arm946-" TYPE_ARM_CPU);
  39     object_property_add_child(obj, "cpu", OBJECT(&s->cpu), NULL);
  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         object_initialize(&s->timer[i], sizeof(s->timer[i]), TYPE_DIGIC_TIMER);
  46         dev = DEVICE(&s->timer[i]);
  47         qdev_set_parent_bus(dev, sysbus_get_default());
  48         snprintf(name, DIGIC_TIMER_NAME_MLEN, "timer[%d]", i);
  49         object_property_add_child(obj, name, OBJECT(&s->timer[i]), NULL);
  50     }
  51
  52     object_initialize(&s->uart, sizeof(s->uart), TYPE_DIGIC_UART);
  53     dev = DEVICE(&s->uart);
  54     qdev_set_parent_bus(dev, sysbus_get_default());
  55     object_property_add_child(obj, "uart", OBJECT(&s->uart), NULL);
  56 }
  57
  58 static void digic_realize(DeviceState *dev, Error **errp)
  59 {
  60     DigicState *s = DIGIC(dev);
  61     Error *err = NULL;
  62     SysBusDevice *sbd;
  63     int i;
  64
  65     object_property_set_bool(OBJECT(&s->cpu), true, "reset-hivecs", &err);
  66     if (err != NULL) {
  67         error_propagate(errp, err);
  68         return;
  69     }
  70
  71     object_property_set_bool(OBJECT(&s->cpu), true, "realized", &err);
  72     if (err != NULL) {
  73         error_propagate(errp, err);
  74         return;
  75     }
  76
  77     for (i = 0; i < DIGIC4_NB_TIMERS; i++) {
  78         object_property_set_bool(OBJECT(&s->timer[i]), true, "realized", &err);
  79         if (err != NULL) {
  80             error_propagate(errp, err);
  81             return;
  82         }
  83
  84         sbd = SYS_BUS_DEVICE(&s->timer[i]);
  85         sysbus_mmio_map(sbd, 0, DIGIC4_TIMER_BASE(i));
  86     }
  87
  88     qdev_prop_set_chr(DEVICE(&s->uart), "chardev", serial_hds[0]);
  89     object_property_set_bool(OBJECT(&s->uart), true, "realized", &err);
  90     if (err != NULL) {
  91         error_propagate(errp, err);
  92         return;
  93     }
  94
  95     sbd = SYS_BUS_DEVICE(&s->uart);
  96     sysbus_mmio_map(sbd, 0, DIGIC_UART_BASE);
  97 }
  98
  99 static void digic_class_init(ObjectClass *oc, void *data)
 100 {
 101     DeviceClass *dc = DEVICE_CLASS(oc);
 102
 103     dc->realize = digic_realize;
 104
 105     /*
 106      * Reason: creates an ARM CPU, thus use after free(), see
 107      * arm_cpu_class_init()
 108      */
 109     dc->cannot_destroy_with_object_finalize_yet = true;
 110 }
 111
 112 static const TypeInfo digic_type_info = {
 113     .name = TYPE_DIGIC,
 114     .parent = TYPE_DEVICE,
 115     .instance_size = sizeof(DigicState),
 116     .instance_init = digic_init,
 117     .class_init = digic_class_init,
 118 };
 119
 120 static void digic_register_types(void)
 121 {
 122     type_register_static(&digic_type_info);
 123 }
 124
 125 type_init(digic_register_types)