hw/block/fdc-sysbus.c - qemu - Git at Google

 /*
  * QEMU Floppy disk emulator (Intel 82078)
  *
  * Copyright (c) 2003, 2007 Jocelyn Mayer
  * Copyright (c) 2008 Hervé Poussineau
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
  * of this software and associated documentation files (the "Software"), to deal
  * in the Software without restriction, including without limitation the rights
  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  * copies of the Software, and to permit persons to whom the Software is
  * furnished to do so, subject to the following conditions:
  *
  * The above copyright notice and this permission notice shall be included in
  * all copies or substantial portions of the Software.
  *
  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */

 #include "qemu/osdep.h"
 #include "qapi/error.h"
 #include "qom/object.h"
 #include "exec/memory.h"
 #include "hw/sysbus.h"
 #include "hw/block/fdc.h"
 #include "migration/vmstate.h"
 #include "fdc-internal.h"
 #include "trace.h"

 #define TYPE_SYSBUS_FDC "base-sysbus-fdc"
 typedef struct FDCtrlSysBusClass FDCtrlSysBusClass;
 typedef struct FDCtrlSysBus FDCtrlSysBus;
 DECLARE_OBJ_CHECKERS(FDCtrlSysBus, FDCtrlSysBusClass,
                      SYSBUS_FDC, TYPE_SYSBUS_FDC)

 struct FDCtrlSysBusClass {
     /*< private >*/
     SysBusDeviceClass parent_class;
     /*< public >*/

     bool use_strict_io;
 };

 struct FDCtrlSysBus {
     /*< private >*/
     SysBusDevice parent_obj;
     /*< public >*/

     struct FDCtrl state;
     MemoryRegion iomem;
 };

 static uint64_t fdctrl_read_mem(void *opaque, hwaddr reg, unsigned ize)
 {
     return fdctrl_read(opaque, (uint32_t)reg);
 }

 static void fdctrl_write_mem(void *opaque, hwaddr reg,
                              uint64_t value, unsigned size)
 {
     fdctrl_write(opaque, (uint32_t)reg, value);
 }

 static const MemoryRegionOps fdctrl_mem_ops = {
     .read = fdctrl_read_mem,
     .write = fdctrl_write_mem,
     .endianness = DEVICE_NATIVE_ENDIAN,
 };

 static const MemoryRegionOps fdctrl_mem_strict_ops = {
     .read = fdctrl_read_mem,
     .write = fdctrl_write_mem,
     .endianness = DEVICE_NATIVE_ENDIAN,
     .valid = {
         .min_access_size = 1,
         .max_access_size = 1,
     },
 };

 static void fdctrl_external_reset_sysbus(DeviceState *d)
 {
     FDCtrlSysBus *sys = SYSBUS_FDC(d);
     FDCtrl *s = &sys->state;

     fdctrl_reset(s, 0);
 }

 static void fdctrl_handle_tc(void *opaque, int irq, int level)
 {
     trace_fdctrl_tc_pulse(level);
 }

 void fdctrl_init_sysbus(qemu_irq irq, hwaddr mmio_base, DriveInfo **fds)
 {
     DeviceState *dev;
     SysBusDevice *sbd;
     FDCtrlSysBus *sys;

     dev = qdev_new("sysbus-fdc");
     sys = SYSBUS_FDC(dev);
     sbd = SYS_BUS_DEVICE(dev);
     sysbus_realize_and_unref(sbd, &error_fatal);
     sysbus_connect_irq(sbd, 0, irq);
     sysbus_mmio_map(sbd, 0, mmio_base);

     fdctrl_init_drives(&sys->state.bus, fds);
 }

 void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
                        DriveInfo **fds, qemu_irq *fdc_tc)
 {
     DeviceState *dev;
     FDCtrlSysBus *sys;

     dev = qdev_new("sun-fdtwo");
     sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
     sys = SYSBUS_FDC(dev);
     sysbus_connect_irq(SYS_BUS_DEVICE(sys), 0, irq);
     sysbus_mmio_map(SYS_BUS_DEVICE(sys), 0, io_base);
     *fdc_tc = qdev_get_gpio_in(dev, 0);

     fdctrl_init_drives(&sys->state.bus, fds);
 }

 static void sysbus_fdc_common_instance_init(Object *obj)
 {
     DeviceState *dev = DEVICE(obj);
     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_GET_CLASS(obj);
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
     FDCtrlSysBus *sys = SYSBUS_FDC(obj);
     FDCtrl *fdctrl = &sys->state;

     /*
      * DMA is not currently supported for sysbus floppy controllers.
      * If we wanted to add support then probably the best approach is
      * to have a QOM link property 'dma-controller' which the board
      * code can set to an instance of IsaDmaClass, and an integer
      * property 'dma-channel', so that we can set fdctrl->dma and
      * fdctrl->dma_chann accordingly.
      */
     fdctrl->dma_chann = -1;

     qdev_set_legacy_instance_id(dev, 0 /* io */, 2); /* FIXME */

     memory_region_init_io(&sys->iomem, obj,
                           sbdc->use_strict_io ? &fdctrl_mem_strict_ops
                                               : &fdctrl_mem_ops,
                           fdctrl, "fdc", 0x08);
     sysbus_init_mmio(sbd, &sys->iomem);

     sysbus_init_irq(sbd, &fdctrl->irq);
     qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
 }

 static void sysbus_fdc_realize(DeviceState *dev, Error **errp)
 {
     FDCtrlSysBus *sys = SYSBUS_FDC(dev);
     FDCtrl *fdctrl = &sys->state;

     fdctrl_realize_common(dev, fdctrl, errp);
 }

 static const VMStateDescription vmstate_sysbus_fdc = {
     .name = "fdc",
     .version_id = 2,
     .minimum_version_id = 2,
     .fields = (const VMStateField[]) {
         VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl),
         VMSTATE_END_OF_LIST()
     }
 };

 static void sysbus_fdc_common_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->realize = sysbus_fdc_realize;
     device_class_set_legacy_reset(dc, fdctrl_external_reset_sysbus);
     dc->vmsd = &vmstate_sysbus_fdc;
     set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
 }

 static const TypeInfo sysbus_fdc_common_typeinfo = {
     .name          = TYPE_SYSBUS_FDC,
     .parent        = TYPE_SYS_BUS_DEVICE,
     .instance_size = sizeof(FDCtrlSysBus),
     .instance_init = sysbus_fdc_common_instance_init,
     .abstract      = true,
     .class_init    = sysbus_fdc_common_class_init,
     .class_size    = sizeof(FDCtrlSysBusClass),
 };

 static Property sysbus_fdc_properties[] = {
     DEFINE_PROP_SIGNED("fdtypeA", FDCtrlSysBus, state.qdev_for_drives[0].type,
                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_SIGNED("fdtypeB", FDCtrlSysBus, state.qdev_for_drives[1].type,
                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void sysbus_fdc_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);

     dc->desc = "virtual floppy controller";
     device_class_set_props(dc, sysbus_fdc_properties);
 }

 static const TypeInfo sysbus_fdc_typeinfo = {
     .name          = "sysbus-fdc",
     .parent        = TYPE_SYSBUS_FDC,
     .class_init    = sysbus_fdc_class_init,
 };

 static Property sun4m_fdc_properties[] = {
     DEFINE_PROP_SIGNED("fdtype", FDCtrlSysBus, state.qdev_for_drives[0].type,
                         FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
                         FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
                         FloppyDriveType),
     DEFINE_PROP_END_OF_LIST(),
 };

 static void sun4m_fdc_class_init(ObjectClass *klass, void *data)
 {
     FDCtrlSysBusClass *sbdc = SYSBUS_FDC_CLASS(klass);
     DeviceClass *dc = DEVICE_CLASS(klass);

     sbdc->use_strict_io = true;
     dc->desc = "virtual floppy controller";
     device_class_set_props(dc, sun4m_fdc_properties);
 }

 static const TypeInfo sun4m_fdc_typeinfo = {
     .name          = "sun-fdtwo",
     .parent        = TYPE_SYSBUS_FDC,
     .class_init    = sun4m_fdc_class_init,
 };

 static void sysbus_fdc_register_types(void)
 {
     type_register_static(&sysbus_fdc_common_typeinfo);
     type_register_static(&sysbus_fdc_typeinfo);
     type_register_static(&sun4m_fdc_typeinfo);
 }

 type_init(sysbus_fdc_register_types)
	/*
	* QEMU Floppy disk emulator (Intel 82078)
	*
	* Copyright (c) 2003, 2007 Jocelyn Mayer
	* Copyright (c) 2008 Hervé Poussineau
	*
	* Permission is hereby granted, free of charge, to any person obtaining a copy
	* of this software and associated documentation files (the "Software"), to deal
	* in the Software without restriction, including without limitation the rights
	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	* copies of the Software, and to permit persons to whom the Software is
	* furnished to do so, subject to the following conditions:
	*
	* The above copyright notice and this permission notice shall be included in
	* all copies or substantial portions of the Software.
	*
	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	* THE SOFTWARE.
	*/

	#include "qemu/osdep.h"
	#include "qapi/error.h"
	#include "qom/object.h"
	#include "exec/memory.h"
	#include "hw/sysbus.h"
	#include "hw/block/fdc.h"
	#include "migration/vmstate.h"
	#include "fdc-internal.h"
	#include "trace.h"

	#define TYPE_SYSBUS_FDC "base-sysbus-fdc"
	typedef struct FDCtrlSysBusClass FDCtrlSysBusClass;
	typedef struct FDCtrlSysBus FDCtrlSysBus;
	DECLARE_OBJ_CHECKERS(FDCtrlSysBus, FDCtrlSysBusClass,
	SYSBUS_FDC, TYPE_SYSBUS_FDC)

	struct FDCtrlSysBusClass {
	/< private >/
	SysBusDeviceClass parent_class;
	/< public >/

	bool use_strict_io;
	};

	struct FDCtrlSysBus {
	/< private >/
	SysBusDevice parent_obj;
	/< public >/

	struct FDCtrl state;
	MemoryRegion iomem;
	};

	static uint64_t fdctrl_read_mem(void *opaque, hwaddr reg, unsigned ize)
	{
	return fdctrl_read(opaque, (uint32_t)reg);
	}

	static void fdctrl_write_mem(void *opaque, hwaddr reg,
	uint64_t value, unsigned size)
	{
	fdctrl_write(opaque, (uint32_t)reg, value);
	}

	static const MemoryRegionOps fdctrl_mem_ops = {
	.read = fdctrl_read_mem,
	.write = fdctrl_write_mem,
	.endianness = DEVICE_NATIVE_ENDIAN,
	};

	static const MemoryRegionOps fdctrl_mem_strict_ops = {
	.read = fdctrl_read_mem,
	.write = fdctrl_write_mem,
	.endianness = DEVICE_NATIVE_ENDIAN,
	.valid = {
	.min_access_size = 1,
	.max_access_size = 1,
	},
	};

	static void fdctrl_external_reset_sysbus(DeviceState *d)
	{
	FDCtrlSysBus *sys = SYSBUS_FDC(d);
	FDCtrl *s = &sys->state;

	fdctrl_reset(s, 0);
	}

	static void fdctrl_handle_tc(void *opaque, int irq, int level)
	{
	trace_fdctrl_tc_pulse(level);
	}

	void fdctrl_init_sysbus(qemu_irq irq, hwaddr mmio_base, DriveInfo **fds)
	{
	DeviceState *dev;
	SysBusDevice *sbd;
	FDCtrlSysBus *sys;

	dev = qdev_new("sysbus-fdc");
	sys = SYSBUS_FDC(dev);
	sbd = SYS_BUS_DEVICE(dev);
	sysbus_realize_and_unref(sbd, &error_fatal);
	sysbus_connect_irq(sbd, 0, irq);
	sysbus_mmio_map(sbd, 0, mmio_base);

	fdctrl_init_drives(&sys->state.bus, fds);
	}

	void sun4m_fdctrl_init(qemu_irq irq, hwaddr io_base,
	DriveInfo *fds, qemu_irq fdc_tc)
	{
	DeviceState *dev;
	FDCtrlSysBus *sys;

	dev = qdev_new("sun-fdtwo");
	sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
	sys = SYSBUS_FDC(dev);
	sysbus_connect_irq(SYS_BUS_DEVICE(sys), 0, irq);
	sysbus_mmio_map(SYS_BUS_DEVICE(sys), 0, io_base);
	*fdc_tc = qdev_get_gpio_in(dev, 0);

	fdctrl_init_drives(&sys->state.bus, fds);
	}

	static void sysbus_fdc_common_instance_init(Object *obj)
	{
	DeviceState *dev = DEVICE(obj);
	FDCtrlSysBusClass *sbdc = SYSBUS_FDC_GET_CLASS(obj);
	SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
	FDCtrlSysBus *sys = SYSBUS_FDC(obj);
	FDCtrl *fdctrl = &sys->state;

	/*
	* DMA is not currently supported for sysbus floppy controllers.
	* If we wanted to add support then probably the best approach is
	* to have a QOM link property 'dma-controller' which the board
	* code can set to an instance of IsaDmaClass, and an integer
	* property 'dma-channel', so that we can set fdctrl->dma and
	* fdctrl->dma_chann accordingly.
	*/
	fdctrl->dma_chann = -1;

	qdev_set_legacy_instance_id(dev, 0 /* io /, 2); / FIXME */

	memory_region_init_io(&sys->iomem, obj,
	sbdc->use_strict_io ? &fdctrl_mem_strict_ops
	: &fdctrl_mem_ops,
	fdctrl, "fdc", 0x08);
	sysbus_init_mmio(sbd, &sys->iomem);

	sysbus_init_irq(sbd, &fdctrl->irq);
	qdev_init_gpio_in(dev, fdctrl_handle_tc, 1);
	}

	static void sysbus_fdc_realize(DeviceState dev, Error *errp)
	{
	FDCtrlSysBus *sys = SYSBUS_FDC(dev);
	FDCtrl *fdctrl = &sys->state;

	fdctrl_realize_common(dev, fdctrl, errp);
	}

	static const VMStateDescription vmstate_sysbus_fdc = {
	.name = "fdc",
	.version_id = 2,
	.minimum_version_id = 2,
	.fields = (const VMStateField[]) {
	VMSTATE_STRUCT(state, FDCtrlSysBus, 0, vmstate_fdc, FDCtrl),
	VMSTATE_END_OF_LIST()
	}
	};

	static void sysbus_fdc_common_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->realize = sysbus_fdc_realize;
	device_class_set_legacy_reset(dc, fdctrl_external_reset_sysbus);
	dc->vmsd = &vmstate_sysbus_fdc;
	set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
	}

	static const TypeInfo sysbus_fdc_common_typeinfo = {
	.name = TYPE_SYSBUS_FDC,
	.parent = TYPE_SYS_BUS_DEVICE,
	.instance_size = sizeof(FDCtrlSysBus),
	.instance_init = sysbus_fdc_common_instance_init,
	.abstract = true,
	.class_init = sysbus_fdc_common_class_init,
	.class_size = sizeof(FDCtrlSysBusClass),
	};

	static Property sysbus_fdc_properties[] = {
	DEFINE_PROP_SIGNED("fdtypeA", FDCtrlSysBus, state.qdev_for_drives[0].type,
	FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
	FloppyDriveType),
	DEFINE_PROP_SIGNED("fdtypeB", FDCtrlSysBus, state.qdev_for_drives[1].type,
	FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
	FloppyDriveType),
	DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
	FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
	FloppyDriveType),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void sysbus_fdc_class_init(ObjectClass klass, void data)
	{
	DeviceClass *dc = DEVICE_CLASS(klass);

	dc->desc = "virtual floppy controller";
	device_class_set_props(dc, sysbus_fdc_properties);
	}

	static const TypeInfo sysbus_fdc_typeinfo = {
	.name = "sysbus-fdc",
	.parent = TYPE_SYSBUS_FDC,
	.class_init = sysbus_fdc_class_init,
	};

	static Property sun4m_fdc_properties[] = {
	DEFINE_PROP_SIGNED("fdtype", FDCtrlSysBus, state.qdev_for_drives[0].type,
	FLOPPY_DRIVE_TYPE_AUTO, qdev_prop_fdc_drive_type,
	FloppyDriveType),
	DEFINE_PROP_SIGNED("fallback", FDCtrlSysBus, state.fallback,
	FLOPPY_DRIVE_TYPE_144, qdev_prop_fdc_drive_type,
	FloppyDriveType),
	DEFINE_PROP_END_OF_LIST(),
	};

	static void sun4m_fdc_class_init(ObjectClass klass, void data)
	{
	FDCtrlSysBusClass *sbdc = SYSBUS_FDC_CLASS(klass);
	DeviceClass *dc = DEVICE_CLASS(klass);

	sbdc->use_strict_io = true;
	dc->desc = "virtual floppy controller";
	device_class_set_props(dc, sun4m_fdc_properties);
	}

	static const TypeInfo sun4m_fdc_typeinfo = {
	.name = "sun-fdtwo",
	.parent = TYPE_SYSBUS_FDC,
	.class_init = sun4m_fdc_class_init,
	};

	static void sysbus_fdc_register_types(void)
	{
	type_register_static(&sysbus_fdc_common_typeinfo);
	type_register_static(&sysbus_fdc_typeinfo);
	type_register_static(&sun4m_fdc_typeinfo);
	}

	type_init(sysbus_fdc_register_types)