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 "exec/memory.h"
  30 #include "hw/sysbus.h"
  31 #include "hw/block/fdc.h"
  32 #include "migration/vmstate.h"
  33 #include "fdc-internal.h"
  34 #include "trace.h"
  35
  36 #define TYPE_SYSBUS_FDC "base-sysbus-fdc"
  37 typedef struct FDCtrlSysBusClass FDCtrlSysBusClass;
  38 typedef struct FDCtrlSysBus FDCtrlSysBus;
  39 DECLARE_OBJ_CHECKERS(FDCtrlSysBus, FDCtrlSysBusClass,
  40                      SYSBUS_FDC, TYPE_SYSBUS_FDC)
  41
  42 struct FDCtrlSysBusClass {
  43     /*< private >*/
  44     SysBusDeviceClass parent_class;
  45     /*< public >*/
  46
  47     bool use_strict_io;
  48 };
  49
  50 struct FDCtrlSysBus {
  51     /*< private >*/
  52     SysBusDevice parent_obj;
  53     /*< public >*/
  54
  55     struct FDCtrl state;
  56     MemoryRegion iomem;
  57 };
  58
  59 static uint64_t fdctrl_read_mem(void *opaque, hwaddr reg, unsigned ize)
  60 {
  61     return fdctrl_read(opaque, (uint32_t)reg);
  62 }
  63
  64 static void fdctrl_write_mem(void *opaque, hwaddr reg,
  65                              uint64_t value, unsigned size)
  66 {
  67     fdctrl_write(opaque, (uint32_t)reg, value);
  68 }
  69
  70 static const MemoryRegionOps fdctrl_mem_ops = {
  71     .read = fdctrl_read_mem,
  72     .write = fdctrl_write_mem,
  73     .endianness = DEVICE_NATIVE_ENDIAN,
  74 };
  75
  76 static const MemoryRegionOps fdctrl_mem_strict_ops = {
  77     .read = fdctrl_read_mem,
  78     .write = fdctrl_write_mem,
  79     .endianness = DEVICE_NATIVE_ENDIAN,
  80     .valid = {
  81         .min_access_size = 1,
  82         .max_access_size = 1,
  83     },
  84 };
  85
  86 static void fdctrl_external_reset_sysbus(DeviceState *d)
  87 {
  88     FDCtrlSysBus *sys = SYSBUS_FDC(d);
  89     FDCtrl *s = &sys->state;
  90
  91     fdctrl_reset(s, 0);
  92 }
  93
  94 static void fdctrl_handle_tc(void *opaque, int irq, int level)
  95 {
  96     trace_fdctrl_tc_pulse(level);
  97 }
  98
  99 void fdctrl_init_sysbus(qemu_irq irq, hwaddr mmio_base, DriveInfo **fds)
 100 {
 101     DeviceState *dev;
 102     SysBusDevice *sbd;
 103     FDCtrlSysBus *sys;
 104
 105     dev = qdev_new("sysbus-fdc");
 106     sys = SYSBUS_FDC(dev);
 107     sbd = SYS_BUS_DEVICE(dev);
 108     sysbus_realize_and_unref(sbd, &error_fatal);
 109     sysbus_connect_irq(sbd, 0, irq);
 110     sysbus_mmio_map(sbd, 0, mmio_base);
 111
 112     fdctrl_init_drives(&sys->state.bus, fds);
 113 }
 114
 115 void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
 116                        DriveInfo **fds, qemu_irq *fdc_tc)
 117 {
 118     DeviceState *dev;
 119     FDCtrlSysBus *sys;
 120
 121     dev = qdev_new("sun-fdtwo");
 122     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
 123     sys = SYSBUS_FDC(dev);
 124     sysbus_connect_irq(SYS_BUS_DEVICE(sys), 0, irq);
 125     sysbus_mmio_map(SYS_BUS_DEVICE(sys), 0, io_base);
 126     *fdc_tc = qdev_get_gpio_in(dev, 0);
 127
 128     fdctrl_init_drives(&sys->state.bus, fds);
 129 }
 130
 131 static void sysbus_fdc_common_instance_init(Object *obj)
 132 {
 133     DeviceState *dev = DEVICE(obj);
 134     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_GET_CLASS(obj);
 135     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 136     FDCtrlSysBus *sys = SYSBUS_FDC(obj);
 137     FDCtrl *fdctrl = &sys->state;
 138
 139     /*
 140      * DMA is not currently supported for sysbus floppy controllers.
 141      * If we wanted to add support then probably the best approach is
 142      * to have a QOM link property 'dma-controller' which the board
 143      * code can set to an instance of IsaDmaClass, and an integer
 144      * property 'dma-channel', so that we can set fdctrl->dma and
 145      * fdctrl->dma_chann accordingly.
 146      */
 147     fdctrl->dma_chann = -1;
 148
 149     qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */
 150
 151     memory_region_init_io(&sys->iomem, obj,
 152                           sbdc->use_strict_io ? &fdctrl_mem_strict_ops
 153                                               : &fdctrl_mem_ops,
 154                           fdctrl, "fdc", 0x08);
 155     sysbus_init_mmio(sbd, &sys->iomem);
 156
 157     sysbus_init_irq(sbd, &fdctrl->irq);
 158     qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
 159 }
 160
 161 static void sysbus_fdc_realize(DeviceState *dev, Error **errp)
 162 {
 163     FDCtrlSysBus *sys = SYSBUS_FDC(dev);
 164     FDCtrl *fdctrl = &sys->state;
 165
 166     fdctrl_realize_common(dev, fdctrl, errp);
 167 }
 168
 169 static const VMStateDescription vmstate_sysbus_fdc = {
 170     .name = "fdc",
 171     .version_id = 2,
 172     .minimum_version_id = 2,
 173     .fields = (const VMStateField[]) {
 174         VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl),
 175         VMSTATE_END_OF_LIST()
 176     }
 177 };
 178
 179 static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data)
 180 {
 181     DeviceClass *dc = DEVICE_CLASS(klass);
 182
 183     dc->realize = sysbus_fdc_realize;
 184     dc->reset = fdctrl_external_reset_sysbus;
 185     dc->vmsd = &vmstate_sysbus_fdc;
 186     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 187 }
 188
 189 static const TypeInfo sysbus_fdc_common_typeinfo = {
 190     .name          = TYPE_SYSBUS_FDC,
 191     .parent        = TYPE_SYS_BUS_DEVICE,
 192     .instance_size = sizeof(FDCtrlSysBus),
 193     .instance_init = sysbus_fdc_common_instance_init,
 194     .abstract      = true,
 195     .class_init    = sysbus_fdc_common_class_init,
 196     .class_size    = sizeof(FDCtrlSysBusClass),
 197 };
 198
 199 static Property sysbus_fdc_properties[] = {
 200     DEFINE_PROP_SIGNED("fdtypeA", FDCtrlSysBus, state.qdev_for_drives[0].type,
 201                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 202                         FloppyDriveType),
 203     DEFINE_PROP_SIGNED("fdtypeB", FDCtrlSysBus, state.qdev_for_drives[1].type,
 204                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 205                         FloppyDriveType),
 206     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
 207                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
 208                         FloppyDriveType),
 209     DEFINE_PROP_END_OF_LIST(),
 210 };
 211
 212 static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 213 {
 214     DeviceClass *dc = DEVICE_CLASS(klass);
 215
 216     dc->desc = "virtual floppy controller";
 217     device_class_set_props(dc, sysbus_fdc_properties);
 218 }
 219
 220 static const TypeInfo sysbus_fdc_typeinfo = {
 221     .name          = "sysbus-fdc",
 222     .parent        = TYPE_SYSBUS_FDC,
 223     .class_init    = sysbus_fdc_class_init,
 224 };
 225
 226 static Property sun4m_fdc_properties[] = {
 227     DEFINE_PROP_SIGNED("fdtype", FDCtrlSysBus, state.qdev_for_drives[0].type,
 228                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
 229                         FloppyDriveType),
 230     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
 231                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
 232                         FloppyDriveType),
 233     DEFINE_PROP_END_OF_LIST(),
 234 };
 235
 236 static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
 237 {
 238     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_CLASS(klass);
 239     DeviceClass *dc = DEVICE_CLASS(klass);
 240
 241     sbdc->use_strict_io = true;
 242     dc->desc = "virtual floppy controller";
 243     device_class_set_props(dc, sun4m_fdc_properties);
 244 }
 245
 246 static const TypeInfo sun4m_fdc_typeinfo = {
 247     .name          = "sun-fdtwo",
 248     .parent        = TYPE_SYSBUS_FDC,
 249     .class_init    = sun4m_fdc_class_init,
 250 };
 251
 252 static void sysbus_fdc_register_types(void)
 253 {
 254     type_register_static(&sysbus_fdc_common_typeinfo);
 255     type_register_static(&sysbus_fdc_typeinfo);
 256     type_register_static(&sun4m_fdc_typeinfo);
 257 }
 258
 259 type_init(sysbus_fdc_register_types)