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-rw-r--r--hw/input/pl050.c278
1 files changed, 278 insertions, 0 deletions
diff --git a/hw/input/pl050.c b/hw/input/pl050.c
new file mode 100644
index 00000000..ec5e1928
--- /dev/null
+++ b/hw/input/pl050.c
@@ -0,0 +1,278 @@
+/*
+ * Arm PrimeCell PL050 Keyboard / Mouse Interface
+ *
+ * Copyright (c) 2006-2007 CodeSourcery.
+ * Written by Paul Brook
+ *
+ * This code is licensed under the GPL.
+ */
+
+/*
+ * QEMU interface:
+ * + sysbus MMIO region 0: MemoryRegion defining the PL050 registers
+ * + Named GPIO input "ps2-input-irq": set to 1 if the downstream PS2 device
+ * has asserted its irq
+ * + sysbus IRQ 0: PL050 output irq
+ */
+
+#include "qemu/osdep.h"
+#include "hw/sysbus.h"
+#include "migration/vmstate.h"
+#include "hw/input/ps2.h"
+#include "hw/input/pl050.h"
+#include "hw/irq.h"
+#include "qemu/log.h"
+#include "qemu/module.h"
+#include "qom/object.h"
+
+
+static const VMStateDescription vmstate_pl050 = {
+ .name = "pl050",
+ .version_id = 2,
+ .minimum_version_id = 2,
+ .fields = (VMStateField[]) {
+ VMSTATE_UINT32(cr, PL050State),
+ VMSTATE_UINT32(clk, PL050State),
+ VMSTATE_UINT32(last, PL050State),
+ VMSTATE_INT32(pending, PL050State),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+#define PL050_TXEMPTY (1 << 6)
+#define PL050_TXBUSY (1 << 5)
+#define PL050_RXFULL (1 << 4)
+#define PL050_RXBUSY (1 << 3)
+#define PL050_RXPARITY (1 << 2)
+#define PL050_KMIC (1 << 1)
+#define PL050_KMID (1 << 0)
+
+static const unsigned char pl050_id[] = {
+ 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1
+};
+
+static void pl050_update_irq(PL050State *s)
+{
+ int level = (s->pending && (s->cr & 0x10) != 0)
+ || (s->cr & 0x08) != 0;
+
+ qemu_set_irq(s->irq, level);
+}
+
+static void pl050_set_irq(void *opaque, int n, int level)
+{
+ PL050State *s = (PL050State *)opaque;
+
+ s->pending = level;
+ pl050_update_irq(s);
+}
+
+static uint64_t pl050_read(void *opaque, hwaddr offset,
+ unsigned size)
+{
+ PL050State *s = (PL050State *)opaque;
+
+ if (offset >= 0xfe0 && offset < 0x1000) {
+ return pl050_id[(offset - 0xfe0) >> 2];
+ }
+
+ switch (offset >> 2) {
+ case 0: /* KMICR */
+ return s->cr;
+ case 1: /* KMISTAT */
+ {
+ uint8_t val;
+ uint32_t stat;
+
+ val = s->last;
+ val = val ^ (val >> 4);
+ val = val ^ (val >> 2);
+ val = (val ^ (val >> 1)) & 1;
+
+ stat = PL050_TXEMPTY;
+ if (val) {
+ stat |= PL050_RXPARITY;
+ }
+ if (s->pending) {
+ stat |= PL050_RXFULL;
+ }
+
+ return stat;
+ }
+ case 2: /* KMIDATA */
+ if (s->pending) {
+ s->last = ps2_read_data(s->ps2dev);
+ }
+ return s->last;
+ case 3: /* KMICLKDIV */
+ return s->clk;
+ case 4: /* KMIIR */
+ return s->pending | 2;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "pl050_read: Bad offset %x\n", (int)offset);
+ return 0;
+ }
+}
+
+static void pl050_write(void *opaque, hwaddr offset,
+ uint64_t value, unsigned size)
+{
+ PL050State *s = (PL050State *)opaque;
+
+ switch (offset >> 2) {
+ case 0: /* KMICR */
+ s->cr = value;
+ pl050_update_irq(s);
+ /* ??? Need to implement the enable/disable bit. */
+ break;
+ case 2: /* KMIDATA */
+ /* ??? This should toggle the TX interrupt line. */
+ /* ??? This means kbd/mouse can block each other. */
+ if (s->is_mouse) {
+ ps2_write_mouse(PS2_MOUSE_DEVICE(s->ps2dev), value);
+ } else {
+ ps2_write_keyboard(PS2_KBD_DEVICE(s->ps2dev), value);
+ }
+ break;
+ case 3: /* KMICLKDIV */
+ s->clk = value;
+ return;
+ default:
+ qemu_log_mask(LOG_GUEST_ERROR,
+ "pl050_write: Bad offset %x\n", (int)offset);
+ }
+}
+static const MemoryRegionOps pl050_ops = {
+ .read = pl050_read,
+ .write = pl050_write,
+ .endianness = DEVICE_NATIVE_ENDIAN,
+};
+
+static void pl050_realize(DeviceState *dev, Error **errp)
+{
+ PL050State *s = PL050(dev);
+
+ qdev_connect_gpio_out(DEVICE(s->ps2dev), PS2_DEVICE_IRQ,
+ qdev_get_gpio_in_named(dev, "ps2-input-irq", 0));
+}
+
+static void pl050_kbd_realize(DeviceState *dev, Error **errp)
+{
+ PL050DeviceClass *pdc = PL050_GET_CLASS(dev);
+ PL050KbdState *s = PL050_KBD_DEVICE(dev);
+ PL050State *ps = PL050(dev);
+
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->kbd), errp)) {
+ return;
+ }
+
+ ps->ps2dev = PS2_DEVICE(&s->kbd);
+ pdc->parent_realize(dev, errp);
+}
+
+static void pl050_kbd_init(Object *obj)
+{
+ PL050KbdState *s = PL050_KBD_DEVICE(obj);
+ PL050State *ps = PL050(obj);
+
+ ps->is_mouse = false;
+ object_initialize_child(obj, "kbd", &s->kbd, TYPE_PS2_KBD_DEVICE);
+}
+
+static void pl050_mouse_realize(DeviceState *dev, Error **errp)
+{
+ PL050DeviceClass *pdc = PL050_GET_CLASS(dev);
+ PL050MouseState *s = PL050_MOUSE_DEVICE(dev);
+ PL050State *ps = PL050(dev);
+
+ if (!sysbus_realize(SYS_BUS_DEVICE(&s->mouse), errp)) {
+ return;
+ }
+
+ ps->ps2dev = PS2_DEVICE(&s->mouse);
+ pdc->parent_realize(dev, errp);
+}
+
+static void pl050_mouse_init(Object *obj)
+{
+ PL050MouseState *s = PL050_MOUSE_DEVICE(obj);
+ PL050State *ps = PL050(obj);
+
+ ps->is_mouse = true;
+ object_initialize_child(obj, "mouse", &s->mouse, TYPE_PS2_MOUSE_DEVICE);
+}
+
+static void pl050_kbd_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ PL050DeviceClass *pdc = PL050_CLASS(oc);
+
+ device_class_set_parent_realize(dc, pl050_kbd_realize,
+ &pdc->parent_realize);
+}
+
+static const TypeInfo pl050_kbd_info = {
+ .name = TYPE_PL050_KBD_DEVICE,
+ .parent = TYPE_PL050,
+ .instance_init = pl050_kbd_init,
+ .instance_size = sizeof(PL050KbdState),
+ .class_init = pl050_kbd_class_init,
+};
+
+static void pl050_mouse_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+ PL050DeviceClass *pdc = PL050_CLASS(oc);
+
+ device_class_set_parent_realize(dc, pl050_mouse_realize,
+ &pdc->parent_realize);
+}
+
+static const TypeInfo pl050_mouse_info = {
+ .name = TYPE_PL050_MOUSE_DEVICE,
+ .parent = TYPE_PL050,
+ .instance_init = pl050_mouse_init,
+ .instance_size = sizeof(PL050MouseState),
+ .class_init = pl050_mouse_class_init,
+};
+
+static void pl050_init(Object *obj)
+{
+ PL050State *s = PL050(obj);
+ SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
+
+ memory_region_init_io(&s->iomem, obj, &pl050_ops, s, "pl050", 0x1000);
+ sysbus_init_mmio(sbd, &s->iomem);
+ sysbus_init_irq(sbd, &s->irq);
+
+ qdev_init_gpio_in_named(DEVICE(obj), pl050_set_irq, "ps2-input-irq", 1);
+}
+
+static void pl050_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->realize = pl050_realize;
+ dc->vmsd = &vmstate_pl050;
+}
+
+static const TypeInfo pl050_type_info = {
+ .name = TYPE_PL050,
+ .parent = TYPE_SYS_BUS_DEVICE,
+ .instance_init = pl050_init,
+ .instance_size = sizeof(PL050State),
+ .class_init = pl050_class_init,
+ .class_size = sizeof(PL050DeviceClass),
+ .abstract = true,
+ .class_init = pl050_class_init,
+};
+
+static void pl050_register_types(void)
+{
+ type_register_static(&pl050_type_info);
+ type_register_static(&pl050_kbd_info);
+ type_register_static(&pl050_mouse_info);
+}
+
+type_init(pl050_register_types)
generated by cgit v1.2.3 (git 2.39.1) at 2025-07-28 07:43:10 +0000