[qemu.git] / hw / syborg_pointer.c

/*
 * Syborg pointing device (mouse/touchscreen)
 *
 * Copyright (c) 2008 CodeSourcery
 *
 * 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 "sysbus.h"
#include "console.h"
#include "syborg.h"

enum {
    POINTER_ID          = 0,
    POINTER_LATCH       = 1,
    POINTER_FIFO_COUNT  = 2,
    POINTER_X           = 3,
    POINTER_Y           = 4,
    POINTER_Z           = 5,
    POINTER_BUTTONS     = 6,
    POINTER_INT_ENABLE  = 7,
    POINTER_FIFO_SIZE   = 8
};

typedef struct {
    int x, y, z, pointer_buttons;
} event_data;

typedef struct {
    SysBusDevice busdev;
    MemoryRegion iomem;
    int int_enabled;
    uint32_t fifo_size;
    event_data *event_fifo;
    int read_pos, read_count;
    qemu_irq irq;
    uint32_t absolute;
} SyborgPointerState;

static void syborg_pointer_update(SyborgPointerState *s)
{
    qemu_set_irq(s->irq, s->read_count && s->int_enabled);
}

static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset,
                                    unsigned size)
{
    SyborgPointerState *s = (SyborgPointerState *)opaque;

    offset &= 0xfff;
    switch (offset >> 2) {
    case POINTER_ID:
        return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
    case POINTER_FIFO_COUNT:
        return s->read_count;
    case POINTER_X:
        return s->event_fifo[s->read_pos].x;
    case POINTER_Y:
        return s->event_fifo[s->read_pos].y;
    case POINTER_Z:
        return s->event_fifo[s->read_pos].z;
    case POINTER_BUTTONS:
        return s->event_fifo[s->read_pos].pointer_buttons;
    case POINTER_INT_ENABLE:
        return s->int_enabled;
    case POINTER_FIFO_SIZE:
        return s->fifo_size;
    default:
        cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
                  (int)offset);
        return 0;
    }
}

static void syborg_pointer_write(void *opaque, target_phys_addr_t offset,
                                 uint64_t value, unsigned size)
{
    SyborgPointerState *s = (SyborgPointerState *)opaque;

    offset &= 0xfff;
    switch (offset >> 2) {
    case POINTER_LATCH:
        if (s->read_count > 0) {
            s->read_count--;
            if (++s->read_pos == s->fifo_size)
                s->read_pos = 0;
        }
        break;
    case POINTER_INT_ENABLE:
        s->int_enabled = value;
        break;
    default:
        cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
                  (int)offset);
    }
    syborg_pointer_update(s);
}

static const MemoryRegionOps syborg_pointer_ops = {
    .read = syborg_pointer_read,
    .write = syborg_pointer_write,
    .endianness = DEVICE_NATIVE_ENDIAN,
};

static void syborg_pointer_event(void *opaque, int dx, int dy, int dz,
                                 int buttons_state)
{
    SyborgPointerState *s = (SyborgPointerState *)opaque;
    int slot = s->read_pos + s->read_count;

    /* This first FIFO entry is used to store current register state.  */
    if (s->read_count < s->fifo_size - 1) {
        s->read_count++;
        slot++;
    }

    if (slot >= s->fifo_size)
          slot -= s->fifo_size;

    if (s->read_count == s->fifo_size && !s->absolute) {
        /* Merge existing entries.  */
        s->event_fifo[slot].x += dx;
        s->event_fifo[slot].y += dy;
        s->event_fifo[slot].z += dz;
    } else {
        s->event_fifo[slot].x = dx;
        s->event_fifo[slot].y = dy;
        s->event_fifo[slot].z = dz;
    }
    s->event_fifo[slot].pointer_buttons = buttons_state;

    syborg_pointer_update(s);
}

static const VMStateDescription vmstate_event_data = {
    .name = "dbma_channel",
    .version_id = 0,
    .minimum_version_id = 0,
    .minimum_version_id_old = 0,
    .fields      = (VMStateField[]) {
        VMSTATE_INT32(x, event_data),
        VMSTATE_INT32(y, event_data),
        VMSTATE_INT32(z, event_data),
        VMSTATE_INT32(pointer_buttons, event_data),
        VMSTATE_END_OF_LIST()
    }
};

static const VMStateDescription vmstate_syborg_pointer = {
    .name = "syborg_pointer",
    .version_id = 1,
    .minimum_version_id = 1,
    .minimum_version_id_old = 1,
    .fields      = (VMStateField[]) {
        VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState),
        VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState),
        VMSTATE_INT32(int_enabled, SyborgPointerState),
        VMSTATE_INT32(read_pos, SyborgPointerState),
        VMSTATE_INT32(read_count, SyborgPointerState),
        VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size,
                                     1, vmstate_event_data, event_data),
        VMSTATE_END_OF_LIST()
    }
};

static int syborg_pointer_init(SysBusDevice *dev)
{
    SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);

    sysbus_init_irq(dev, &s->irq);
    memory_region_init_io(&s->iomem, &syborg_pointer_ops, s,
                          "pointer", 0x1000);
    sysbus_init_mmio_region(dev, &s->iomem);

    if (s->fifo_size <= 0) {
        fprintf(stderr, "syborg_pointer: fifo too small\n");
        s->fifo_size = 16;
    }
    s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0]));

    qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
                                 "Syborg Pointer");

    vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s);
    return 0;
}

static SysBusDeviceInfo syborg_pointer_info = {
    .init = syborg_pointer_init,
    .qdev.name  = "syborg,pointer",
    .qdev.size  = sizeof(SyborgPointerState),
    .qdev.props = (Property[]) {
        DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16),
        DEFINE_PROP_UINT32("absolute",  SyborgPointerState, absolute,   1),
        DEFINE_PROP_END_OF_LIST(),
    }
};

static void syborg_pointer_register_devices(void)
{
    sysbus_register_withprop(&syborg_pointer_info);
}

device_init(syborg_pointer_register_devices)
Commit	Line	Data
4af39611 PB	1	/*
	2	* Syborg pointing device (mouse/touchscreen)
	3	*
	4	* Copyright (c) 2008 CodeSourcery
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24
	25	#include "sysbus.h"
	26	#include "console.h"
	27	#include "syborg.h"
	28
	29	enum {
	30	POINTER_ID = 0,
	31	POINTER_LATCH = 1,
	32	POINTER_FIFO_COUNT = 2,
	33	POINTER_X = 3,
	34	POINTER_Y = 4,
	35	POINTER_Z = 5,
	36	POINTER_BUTTONS = 6,
	37	POINTER_INT_ENABLE = 7,
	38	POINTER_FIFO_SIZE = 8
	39	};
	40
	41	typedef struct {
	42	int x, y, z, pointer_buttons;
	43	} event_data;
	44
	45	typedef struct {
	46	SysBusDevice busdev;
9ca9e358	47	MemoryRegion iomem;
4af39611	48	int int_enabled;
ee6847d1	49	uint32_t fifo_size;
4af39611 PB	50	event_data *event_fifo;
	51	int read_pos, read_count;
	52	qemu_irq irq;
ee6847d1	53	uint32_t absolute;
4af39611 PB	54	} SyborgPointerState;
	55
	56	static void syborg_pointer_update(SyborgPointerState *s)
	57	{
	58	qemu_set_irq(s->irq, s->read_count && s->int_enabled);
	59	}
	60
9ca9e358 BC	61	static uint64_t syborg_pointer_read(void *opaque, target_phys_addr_t offset,
9ca9e358 BC	62	unsigned size)
4af39611 PB	63	{
	64	SyborgPointerState s = (SyborgPointerState )opaque;
	65
	66	offset &= 0xfff;
	67	switch (offset >> 2) {
	68	case POINTER_ID:
	69	return s->absolute ? SYBORG_ID_TOUCHSCREEN : SYBORG_ID_MOUSE;
	70	case POINTER_FIFO_COUNT:
	71	return s->read_count;
	72	case POINTER_X:
	73	return s->event_fifo[s->read_pos].x;
	74	case POINTER_Y:
	75	return s->event_fifo[s->read_pos].y;
	76	case POINTER_Z:
	77	return s->event_fifo[s->read_pos].z;
	78	case POINTER_BUTTONS:
	79	return s->event_fifo[s->read_pos].pointer_buttons;
	80	case POINTER_INT_ENABLE:
	81	return s->int_enabled;
	82	case POINTER_FIFO_SIZE:
	83	return s->fifo_size;
	84	default:
	85	cpu_abort(cpu_single_env, "syborg_pointer_read: Bad offset %x\n",
	86	(int)offset);
	87	return 0;
	88	}
	89	}
	90
c227f099	91	static void syborg_pointer_write(void *opaque, target_phys_addr_t offset,
9ca9e358	92	uint64_t value, unsigned size)
4af39611 PB	93	{
	94	SyborgPointerState s = (SyborgPointerState )opaque;
	95
	96	offset &= 0xfff;
	97	switch (offset >> 2) {
	98	case POINTER_LATCH:
	99	if (s->read_count > 0) {
	100	s->read_count--;
	101	if (++s->read_pos == s->fifo_size)
	102	s->read_pos = 0;
	103	}
	104	break;
	105	case POINTER_INT_ENABLE:
	106	s->int_enabled = value;
	107	break;
	108	default:
	109	cpu_abort(cpu_single_env, "syborg_pointer_write: Bad offset %x\n",
	110	(int)offset);
	111	}
	112	syborg_pointer_update(s);
	113	}
	114
9ca9e358 BC	115	static const MemoryRegionOps syborg_pointer_ops = {
	116	.read = syborg_pointer_read,
	117	.write = syborg_pointer_write,
	118	.endianness = DEVICE_NATIVE_ENDIAN,
4af39611 PB	119	};
	120
	121	static void syborg_pointer_event(void *opaque, int dx, int dy, int dz,
	122	int buttons_state)
	123	{
	124	SyborgPointerState s = (SyborgPointerState )opaque;
	125	int slot = s->read_pos + s->read_count;
	126
	127	/* This first FIFO entry is used to store current register state. */
	128	if (s->read_count < s->fifo_size - 1) {
	129	s->read_count++;
	130	slot++;
	131	}
	132
	133	if (slot >= s->fifo_size)
	134	slot -= s->fifo_size;
	135
	136	if (s->read_count == s->fifo_size && !s->absolute) {
	137	/* Merge existing entries. */
	138	s->event_fifo[slot].x += dx;
	139	s->event_fifo[slot].y += dy;
	140	s->event_fifo[slot].z += dz;
	141	} else {
	142	s->event_fifo[slot].x = dx;
	143	s->event_fifo[slot].y = dy;
	144	s->event_fifo[slot].z = dz;
	145	}
	146	s->event_fifo[slot].pointer_buttons = buttons_state;
	147
	148	syborg_pointer_update(s);
	149	}
	150
80a52680 JQ	151	static const VMStateDescription vmstate_event_data = {
	152	.name = "dbma_channel",
	153	.version_id = 0,
	154	.minimum_version_id = 0,
	155	.minimum_version_id_old = 0,
	156	.fields = (VMStateField[]) {
	157	VMSTATE_INT32(x, event_data),
	158	VMSTATE_INT32(y, event_data),
	159	VMSTATE_INT32(z, event_data),
	160	VMSTATE_INT32(pointer_buttons, event_data),
	161	VMSTATE_END_OF_LIST()
4af39611	162	}
80a52680	163	};
4af39611	164
80a52680 JQ	165	static const VMStateDescription vmstate_syborg_pointer = {
	166	.name = "syborg_pointer",
	167	.version_id = 1,
	168	.minimum_version_id = 1,
	169	.minimum_version_id_old = 1,
	170	.fields = (VMStateField[]) {
	171	VMSTATE_UINT32_EQUAL(fifo_size, SyborgPointerState),
	172	VMSTATE_UINT32_EQUAL(absolute, SyborgPointerState),
	173	VMSTATE_INT32(int_enabled, SyborgPointerState),
	174	VMSTATE_INT32(read_pos, SyborgPointerState),
	175	VMSTATE_INT32(read_count, SyborgPointerState),
	176	VMSTATE_STRUCT_VARRAY_UINT32(event_fifo, SyborgPointerState, fifo_size,
	177	1, vmstate_event_data, event_data),
	178	VMSTATE_END_OF_LIST()
4af39611	179	}
80a52680	180	};
4af39611	181
81a322d4	182	static int syborg_pointer_init(SysBusDevice *dev)
4af39611 PB	183	{
4af39611 PB	184	SyborgPointerState *s = FROM_SYSBUS(SyborgPointerState, dev);
4af39611 PB	185
4af39611 PB	186	sysbus_init_irq(dev, &s->irq);
9ca9e358 BC	187	memory_region_init_io(&s->iomem, &syborg_pointer_ops, s,
	188	"pointer", 0x1000);
	189	sysbus_init_mmio_region(dev, &s->iomem);
4af39611	190
4af39611 PB	191	if (s->fifo_size <= 0) {
	192	fprintf(stderr, "syborg_pointer: fifo too small\n");
	193	s->fifo_size = 16;
	194	}
7267c094	195	s->event_fifo = g_malloc0(s->fifo_size * sizeof(s->event_fifo[0]));
4af39611 PB	196
	197	qemu_add_mouse_event_handler(syborg_pointer_event, s, s->absolute,
	198	"Syborg Pointer");
	199
80a52680	200	vmstate_register(&dev->qdev, -1, &vmstate_syborg_pointer, s);
81a322d4	201	return 0;
4af39611 PB	202	}
4af39611 PB	203
ee6847d1 GH	204	static SysBusDeviceInfo syborg_pointer_info = {
	205	.init = syborg_pointer_init,
	206	.qdev.name = "syborg,pointer",
	207	.qdev.size = sizeof(SyborgPointerState),
	208	.qdev.props = (Property[]) {
5cdabc14 GH	209	DEFINE_PROP_UINT32("fifo-size", SyborgPointerState, fifo_size, 16),
	210	DEFINE_PROP_UINT32("absolute", SyborgPointerState, absolute, 1),
	211	DEFINE_PROP_END_OF_LIST(),
ee6847d1 GH	212	}
	213	};
	214
4af39611 PB	215	static void syborg_pointer_register_devices(void)
4af39611 PB	216	{
ee6847d1	217	sysbus_register_withprop(&syborg_pointer_info);
4af39611 PB	218	}
	219
	220	device_init(syborg_pointer_register_devices)