hw/ide/mmio.c

   1 /*
   2  * QEMU IDE Emulation: mmio support (for embedded).
   3  *
   4  * Copyright (c) 2003 Fabrice Bellard
   5  * Copyright (c) 2006 Openedhand Ltd.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a copy
   8  * of this software and associated documentation files (the "Software"), to deal
   9  * in the Software without restriction, including without limitation the rights
  10  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  11  * copies of the Software, and to permit persons to whom the Software is
  12  * furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included in
  15  * all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  23  * THE SOFTWARE.
  24  */
  25
  26 #include "qemu/osdep.h"
  27 #include "hw/sysbus.h"
  28 #include "migration/vmstate.h"
  29 #include "qemu/module.h"
  30 #include "sysemu/dma.h"
  31
  32 #include "hw/ide/mmio.h"
  33 #include "hw/qdev-properties.h"
  34 #include "ide-internal.h"
  35
  36 /***********************************************************/
  37 /* MMIO based ide port
  38  * This emulates IDE device connected directly to the CPU bus without
  39  * dedicated ide controller, which is often seen on embedded boards.
  40  */
  41
  42 struct MMIOIDEState {
  43     /*< private >*/
  44     SysBusDevice parent_obj;
  45     /*< public >*/
  46
  47     IDEBus bus;
  48
  49     uint32_t shift;
  50     qemu_irq irq;
  51     MemoryRegion iomem1, iomem2;
  52 };
  53
  54 static void mmio_ide_reset(DeviceState *dev)
  55 {
  56     MMIOIDEState *s = MMIO_IDE(dev);
  57
  58     ide_bus_reset(&s->bus);
  59 }
  60
  61 static uint64_t mmio_ide_read(void *opaque, hwaddr addr,
  62                               unsigned size)
  63 {
  64     MMIOIDEState *s = opaque;
  65     addr >>= s->shift;
  66     if (addr & 7)
  67         return ide_ioport_read(&s->bus, addr);
  68     else
  69         return ide_data_readw(&s->bus, 0);
  70 }
  71
  72 static void mmio_ide_write(void *opaque, hwaddr addr,
  73                            uint64_t val, unsigned size)
  74 {
  75     MMIOIDEState *s = opaque;
  76     addr >>= s->shift;
  77     if (addr & 7)
  78         ide_ioport_write(&s->bus, addr, val);
  79     else
  80         ide_data_writew(&s->bus, 0, val);
  81 }
  82
  83 static const MemoryRegionOps mmio_ide_ops = {
  84     .read = mmio_ide_read,
  85     .write = mmio_ide_write,
  86     .endianness = DEVICE_LITTLE_ENDIAN,
  87 };
  88
  89 static uint64_t mmio_ide_status_read(void *opaque, hwaddr addr,
  90                                      unsigned size)
  91 {
  92     MMIOIDEState *s = opaque;
  93     return ide_status_read(&s->bus, 0);
  94 }
  95
  96 static void mmio_ide_ctrl_write(void *opaque, hwaddr addr,
  97                                 uint64_t val, unsigned size)
  98 {
  99     MMIOIDEState *s = opaque;
 100     ide_ctrl_write(&s->bus, 0, val);
 101 }
 102
 103 static const MemoryRegionOps mmio_ide_cs_ops = {
 104     .read = mmio_ide_status_read,
 105     .write = mmio_ide_ctrl_write,
 106     .endianness = DEVICE_LITTLE_ENDIAN,
 107 };
 108
 109 static const VMStateDescription vmstate_ide_mmio = {
 110     .name = "mmio-ide",
 111     .version_id = 3,
 112     .minimum_version_id = 0,
 113     .fields = (const VMStateField[]) {
 114         VMSTATE_IDE_BUS(bus, MMIOIDEState),
 115         VMSTATE_IDE_DRIVES(bus.ifs, MMIOIDEState),
 116         VMSTATE_END_OF_LIST()
 117     }
 118 };
 119
 120 static void mmio_ide_realizefn(DeviceState *dev, Error **errp)
 121 {
 122     SysBusDevice *d = SYS_BUS_DEVICE(dev);
 123     MMIOIDEState *s = MMIO_IDE(dev);
 124
 125     ide_bus_init_output_irq(&s->bus, s->irq);
 126
 127     memory_region_init_io(&s->iomem1, OBJECT(s), &mmio_ide_ops, s,
 128                           "ide-mmio.1", 16 << s->shift);
 129     memory_region_init_io(&s->iomem2, OBJECT(s), &mmio_ide_cs_ops, s,
 130                           "ide-mmio.2", 2 << s->shift);
 131     sysbus_init_mmio(d, &s->iomem1);
 132     sysbus_init_mmio(d, &s->iomem2);
 133 }
 134
 135 static void mmio_ide_initfn(Object *obj)
 136 {
 137     SysBusDevice *d = SYS_BUS_DEVICE(obj);
 138     MMIOIDEState *s = MMIO_IDE(obj);
 139
 140     ide_bus_init(&s->bus, sizeof(s->bus), DEVICE(obj), 0, 2);
 141     sysbus_init_irq(d, &s->irq);
 142 }
 143
 144 static Property mmio_ide_properties[] = {
 145     DEFINE_PROP_UINT32("shift", MMIOIDEState, shift, 0),
 146     DEFINE_PROP_END_OF_LIST()
 147 };
 148
 149 static void mmio_ide_class_init(ObjectClass *oc, void *data)
 150 {
 151     DeviceClass *dc = DEVICE_CLASS(oc);
 152
 153     dc->realize = mmio_ide_realizefn;
 154     device_class_set_legacy_reset(dc, mmio_ide_reset);
 155     device_class_set_props(dc, mmio_ide_properties);
 156     dc->vmsd = &vmstate_ide_mmio;
 157 }
 158
 159 static const TypeInfo mmio_ide_type_info = {
 160     .name = TYPE_MMIO_IDE,
 161     .parent = TYPE_SYS_BUS_DEVICE,
 162     .instance_size = sizeof(MMIOIDEState),
 163     .instance_init = mmio_ide_initfn,
 164     .class_init = mmio_ide_class_init,
 165 };
 166
 167 static void mmio_ide_register_types(void)
 168 {
 169     type_register_static(&mmio_ide_type_info);
 170 }
 171
 172 void mmio_ide_init_drives(DeviceState *dev, DriveInfo *hd0, DriveInfo *hd1)
 173 {
 174     MMIOIDEState *s = MMIO_IDE(dev);
 175
 176     if (hd0 != NULL) {
 177         ide_bus_create_drive(&s->bus, 0, hd0);
 178     }
 179     if (hd1 != NULL) {
 180         ide_bus_create_drive(&s->bus, 1, hd1);
 181     }
 182 }
 183
 184 type_init(mmio_ide_register_types)