hw/block/fdc-sysbus.c

   1 /*
   2  * QEMU Floppy disk emulator (Intel 82078)
   3  *
   4  * Copyright (c) 2003, 2007 Jocelyn Mayer
   5  * Copyright (c) 2008 Hervé Poussineau
   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 "qapi/error.h"
  28 #include "qom/object.h"
  29 #include "hw/sysbus.h"
  30 #include "hw/block/fdc.h"
  31 #include "migration/vmstate.h"
  32 #include "fdc-internal.h"
  33 #include "trace.h"
  34
  35 #define TYPE_SYSBUS_FDC "base-sysbus-fdc"
  36 typedef struct FDCtrlSysBusClass FDCtrlSysBusClass;
  37 typedef struct FDCtrlSysBus FDCtrlSysBus;
  38 DECLARE_OBJ_CHECKERS(FDCtrlSysBus, FDCtrlSysBusClass,
  39                      SYSBUS_FDC, TYPE_SYSBUS_FDC)
  40
  41 struct FDCtrlSysBusClass {
  42     /*< private >*/
  43     SysBusDeviceClass parent_class;
  44     /*< public >*/
  45
  46     bool use_strict_io;
  47 };
  48
  49 struct FDCtrlSysBus {
  50     /*< private >*/
  51     SysBusDevice parent_obj;
  52     /*< public >*/
  53
  54     struct FDCtrl state;
  55 };
  56
  57 static uint64_t fdctrl_read_mem(void *opaque, hwaddr reg, unsigned ize)
  58 {
  59     return fdctrl_read(opaque, (uint32_t)reg);
  60 }
  61
  62 static void fdctrl_write_mem(void *opaque, hwaddr reg,
  63                              uint64_t value, unsigned size)
  64 {
  65     fdctrl_write(opaque, (uint32_t)reg, value);
  66 }
  67
  68 static const MemoryRegionOps fdctrl_mem_ops = {
  69     .read = fdctrl_read_mem,
  70     .write = fdctrl_write_mem,
  71     .endianness = DEVICE_NATIVE_ENDIAN,
  72 };
  73
  74 static const MemoryRegionOps fdctrl_mem_strict_ops = {
  75     .read = fdctrl_read_mem,
  76     .write = fdctrl_write_mem,
  77     .endianness = DEVICE_NATIVE_ENDIAN,
  78     .valid = {
  79         .min_access_size = 1,
  80         .max_access_size = 1,
  81     },
  82 };
  83
  84 static void fdctrl_external_reset_sysbus(DeviceState *d)
  85 {
  86     FDCtrlSysBus *sys = SYSBUS_FDC(d);
  87     FDCtrl *s = &sys->state;
  88
  89     fdctrl_reset(s, 0);
  90 }
  91
  92 static void fdctrl_handle_tc(void *opaque, int irq, int level)
  93 {
  94     trace_fdctrl_tc_pulse(level);
  95 }
  96
  97 void fdctrl_init_sysbus(qemu_irq irq, hwaddr mmio_base, DriveInfo **fds)
  98 {
  99     DeviceState *dev;
 100     SysBusDevice *sbd;
 101     FDCtrlSysBus *sys;
 102
 103     dev = qdev_new("sysbus-fdc");
 104     sys = SYSBUS_FDC(dev);
 105     sbd = SYS_BUS_DEVICE(dev);
 106     sysbus_realize_and_unref(sbd, &error_fatal);
 107     sysbus_connect_irq(sbd, 0, irq);
 108     sysbus_mmio_map(sbd, 0, mmio_base);
 109
 110     fdctrl_init_drives(&sys->state.bus, fds);
 111 }
 112
 113 void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
 114                        DriveInfo **fds, qemu_irq *fdc_tc)
 115 {
 116     DeviceState *dev;
 117     FDCtrlSysBus *sys;
 118
 119     dev = qdev_new("sun-fdtwo");
 120     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 121     sys = SYSBUS_FDC(dev);
 122     sysbus_connect_irq(SYS_BUS_DEVICE(sys), 0, irq);
 123     sysbus_mmio_map(SYS_BUS_DEVICE(sys), 0, io_base);
 124     *fdc_tc = qdev_get_gpio_in(dev, 0);
 125
 126     fdctrl_init_drives(&sys->state.bus, fds);
 127 }
 128
 129 static void sysbus_fdc_common_instance_init(Object *obj)
 130 {
 131     DeviceState *dev = DEVICE(obj);
 132     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_GET_CLASS(obj);
 133     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 134     FDCtrlSysBus *sys = SYSBUS_FDC(obj);
 135     FDCtrl *fdctrl = &sys->state;
 136
 137     /*
 138      * DMA is not currently supported for sysbus floppy controllers.
 139      * If we wanted to add support then probably the best approach is
 140      * to have a QOM link property 'dma-controller' which the board
 141      * code can set to an instance of IsaDmaClass, and an integer
 142      * property 'dma-channel', so that we can set fdctrl->dma and
 143      * fdctrl->dma_chann accordingly.
 144      */
 145     fdctrl->dma_chann = -1;
 146
 147     qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */
 148
 149     memory_region_init_io(&fdctrl->iomem, obj,
 150                           sbdc->use_strict_io ? &fdctrl_mem_strict_ops
 151                                               : &fdctrl_mem_ops,
 152                           fdctrl, "fdc", 0x08);
 153     sysbus_init_mmio(sbd, &fdctrl->iomem);
 154
 155     sysbus_init_irq(sbd, &fdctrl->irq);
 156     qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
 157 }
 158
 159 static void sysbus_fdc_realize(DeviceState *dev, Error **errp)
 160 {
 161     FDCtrlSysBus *sys = SYSBUS_FDC(dev);
 162     FDCtrl *fdctrl = &sys->state;
 163
 164     fdctrl_realize_common(dev, fdctrl, errp);
 165 }
 166
 167 static const VMStateDescription vmstate_sysbus_fdc = {
 168     .name = "fdc",
 169     .version_id = 2,
 170     .minimum_version_id = 2,
 171     .fields = (VMStateField[]) {
 172         VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl),
 173         VMSTATE_END_OF_LIST()
 174     }
 175 };
 176
 177 static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data)
 178 {
 179     DeviceClass *dc = DEVICE_CLASS(klass);
 180
 181     dc->realize = sysbus_fdc_realize;
 182     dc->reset = fdctrl_external_reset_sysbus;
 183     dc->vmsd = &vmstate_sysbus_fdc;
 184     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 185 }
 186
 187 static const TypeInfo sysbus_fdc_common_typeinfo = {
 188     .name          = TYPE_SYSBUS_FDC,
 189     .parent        = TYPE_SYS_BUS_DEVICE,
 190     .instance_size = sizeof(FDCtrlSysBus),
 191     .instance_init = sysbus_fdc_common_instance_init,
 192     .abstract      = true,
 193     .class_init    = sysbus_fdc_common_class_init,
 194     .class_size    = sizeof(FDCtrlSysBusClass),
 195 };
 196
 197 static Property sysbus_fdc_properties[] = {
 198     DEFINE_PROP_SIGNED("fdtypeA", FDCtrlSysBus, state.qdev_for_drives[0].type,
 199                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 200                         FloppyDriveType),
 201     DEFINE_PROP_SIGNED("fdtypeB", FDCtrlSysBus, state.qdev_for_drives[1].type,
 202                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 203                         FloppyDriveType),
 204     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
 205                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
 206                         FloppyDriveType),
 207     DEFINE_PROP_END_OF_LIST(),
 208 };
 209
 210 static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 211 {
 212     DeviceClass *dc = DEVICE_CLASS(klass);
 213
 214     dc->desc = "virtual floppy controller";
 215     device_class_set_props(dc, sysbus_fdc_properties);
 216 }
 217
 218 static const TypeInfo sysbus_fdc_typeinfo = {
 219     .name          = "sysbus-fdc",
 220     .parent        = TYPE_SYSBUS_FDC,
 221     .class_init    = sysbus_fdc_class_init,
 222 };
 223
 224 static Property sun4m_fdc_properties[] = {
 225     DEFINE_PROP_SIGNED("fdtype", FDCtrlSysBus, state.qdev_for_drives[0].type,
 226                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 227                         FloppyDriveType),
 228     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
 229                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
 230                         FloppyDriveType),
 231     DEFINE_PROP_END_OF_LIST(),
 232 };
 233
 234 static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
 235 {
 236     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_CLASS(klass);
 237     DeviceClass *dc = DEVICE_CLASS(klass);
 238
 239     sbdc->use_strict_io = true;
 240     dc->desc = "virtual floppy controller";
 241     device_class_set_props(dc, sun4m_fdc_properties);
 242 }
 243
 244 static const TypeInfo sun4m_fdc_typeinfo = {
 245     .name          = "sun-fdtwo",
 246     .parent        = TYPE_SYSBUS_FDC,
 247     .class_init    = sun4m_fdc_class_init,
 248 };
 249
 250 static void sysbus_fdc_register_types(void)
 251 {
 252     type_register_static(&sysbus_fdc_common_typeinfo);
 253     type_register_static(&sysbus_fdc_typeinfo);
 254     type_register_static(&sun4m_fdc_typeinfo);
 255 }
 256
 257 type_init(sysbus_fdc_register_types)