2 * Arm PrimeCell PL050 Keyboard / Mouse Interface
4 * Copyright (c) 2006-2007 CodeSourcery.
5 * Written by Paul Brook
7 * This code is licensed under the GPL.
10 #include "qemu/osdep.h"
11 #include "hw/sysbus.h"
12 #include "hw/input/ps2.h"
14 #define TYPE_PL050 "pl050"
15 #define PL050(obj) OBJECT_CHECK(PL050State, (obj), TYPE_PL050)
17 typedef struct PL050State {
18 SysBusDevice parent_obj;
30 static const VMStateDescription vmstate_pl050 = {
33 .minimum_version_id = 2,
34 .fields = (VMStateField[]) {
35 VMSTATE_UINT32(cr, PL050State),
36 VMSTATE_UINT32(clk, PL050State),
37 VMSTATE_UINT32(last, PL050State),
38 VMSTATE_INT32(pending, PL050State),
43 #define PL050_TXEMPTY (1 << 6)
44 #define PL050_TXBUSY (1 << 5)
45 #define PL050_RXFULL (1 << 4)
46 #define PL050_RXBUSY (1 << 3)
47 #define PL050_RXPARITY (1 << 2)
48 #define PL050_KMIC (1 << 1)
49 #define PL050_KMID (1 << 0)
51 static const unsigned char pl050_id[] =
52 { 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 };
54 static void pl050_update(void *opaque, int level)
56 PL050State *s = (PL050State *)opaque;
60 raise = (s->pending && (s->cr & 0x10) != 0)
61 || (s->cr & 0x08) != 0;
62 qemu_set_irq(s->irq, raise);
65 static uint64_t pl050_read(void *opaque, hwaddr offset,
68 PL050State *s = (PL050State *)opaque;
69 if (offset >= 0xfe0 && offset < 0x1000)
70 return pl050_id[(offset - 0xfe0) >> 2];
72 switch (offset >> 2) {
81 val = val ^ (val >> 4);
82 val = val ^ (val >> 2);
83 val = (val ^ (val >> 1)) & 1;
87 stat |= PL050_RXPARITY;
95 s->last = ps2_read_data(s->dev);
97 case 3: /* KMICLKDIV */
100 return s->pending | 2;
102 qemu_log_mask(LOG_GUEST_ERROR,
103 "pl050_read: Bad offset %x\n", (int)offset);
108 static void pl050_write(void *opaque, hwaddr offset,
109 uint64_t value, unsigned size)
111 PL050State *s = (PL050State *)opaque;
112 switch (offset >> 2) {
115 pl050_update(s, s->pending);
116 /* ??? Need to implement the enable/disable bit. */
118 case 2: /* KMIDATA */
119 /* ??? This should toggle the TX interrupt line. */
120 /* ??? This means kbd/mouse can block each other. */
122 ps2_write_mouse(s->dev, value);
124 ps2_write_keyboard(s->dev, value);
127 case 3: /* KMICLKDIV */
131 qemu_log_mask(LOG_GUEST_ERROR,
132 "pl050_write: Bad offset %x\n", (int)offset);
135 static const MemoryRegionOps pl050_ops = {
137 .write = pl050_write,
138 .endianness = DEVICE_NATIVE_ENDIAN,
141 static int pl050_initfn(SysBusDevice *dev)
143 PL050State *s = PL050(dev);
145 memory_region_init_io(&s->iomem, OBJECT(s), &pl050_ops, s, "pl050", 0x1000);
146 sysbus_init_mmio(dev, &s->iomem);
147 sysbus_init_irq(dev, &s->irq);
149 s->dev = ps2_mouse_init(pl050_update, s);
151 s->dev = ps2_kbd_init(pl050_update, s);
156 static void pl050_keyboard_init(Object *obj)
158 PL050State *s = PL050(obj);
163 static void pl050_mouse_init(Object *obj)
165 PL050State *s = PL050(obj);
170 static const TypeInfo pl050_kbd_info = {
171 .name = "pl050_keyboard",
172 .parent = TYPE_PL050,
173 .instance_init = pl050_keyboard_init,
176 static const TypeInfo pl050_mouse_info = {
177 .name = "pl050_mouse",
178 .parent = TYPE_PL050,
179 .instance_init = pl050_mouse_init,
182 static void pl050_class_init(ObjectClass *oc, void *data)
184 DeviceClass *dc = DEVICE_CLASS(oc);
185 SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(oc);
187 sdc->init = pl050_initfn;
188 dc->vmsd = &vmstate_pl050;
191 static const TypeInfo pl050_type_info = {
193 .parent = TYPE_SYS_BUS_DEVICE,
194 .instance_size = sizeof(PL050State),
196 .class_init = pl050_class_init,
199 static void pl050_register_types(void)
201 type_register_static(&pl050_type_info);
202 type_register_static(&pl050_kbd_info);
203 type_register_static(&pl050_mouse_info);
206 type_init(pl050_register_types)