diff options
Diffstat (limited to 'hw/input/pl050.c')
| -rw-r--r-- | hw/input/pl050.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/hw/input/pl050.c b/hw/input/pl050.c new file mode 100644 index 0000000000..7dd8a59dd4 --- /dev/null +++ b/hw/input/pl050.c @@ -0,0 +1,199 @@ +/* + * Arm PrimeCell PL050 Keyboard / Mouse Interface + * + * Copyright (c) 2006-2007 CodeSourcery. + * Written by Paul Brook + * + * This code is licensed under the GPL. + */ + +#include "hw/sysbus.h" +#include "hw/input/ps2.h" + +typedef struct { + SysBusDevice busdev; + MemoryRegion iomem; + void *dev; + uint32_t cr; + uint32_t clk; + uint32_t last; + int pending; + qemu_irq irq; + int is_mouse; +} pl050_state; + +static const VMStateDescription vmstate_pl050 = { + .name = "pl050", + .version_id = 2, + .minimum_version_id = 2, + .fields = (VMStateField[]) { + VMSTATE_UINT32(cr, pl050_state), + VMSTATE_UINT32(clk, pl050_state), + VMSTATE_UINT32(last, pl050_state), + VMSTATE_INT32(pending, pl050_state), + 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(void *opaque, int level) +{ + pl050_state *s = (pl050_state *)opaque; + int raise; + + s->pending = level; + raise = (s->pending && (s->cr & 0x10) != 0) + || (s->cr & 0x08) != 0; + qemu_set_irq(s->irq, raise); +} + +static uint64_t pl050_read(void *opaque, hwaddr offset, + unsigned size) +{ + pl050_state *s = (pl050_state *)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->dev); + 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) +{ + pl050_state *s = (pl050_state *)opaque; + switch (offset >> 2) { + case 0: /* KMICR */ + s->cr = value; + pl050_update(s, s->pending); + /* ??? 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(s->dev, value); + } else { + ps2_write_keyboard(s->dev, 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 int pl050_init(SysBusDevice *dev, int is_mouse) +{ + pl050_state *s = FROM_SYSBUS(pl050_state, dev); + + memory_region_init_io(&s->iomem, &pl050_ops, s, "pl050", 0x1000); + sysbus_init_mmio(dev, &s->iomem); + sysbus_init_irq(dev, &s->irq); + s->is_mouse = is_mouse; + if (s->is_mouse) + s->dev = ps2_mouse_init(pl050_update, s); + else + s->dev = ps2_kbd_init(pl050_update, s); + return 0; +} + +static int pl050_init_keyboard(SysBusDevice *dev) +{ + return pl050_init(dev, 0); +} + +static int pl050_init_mouse(SysBusDevice *dev) +{ + return pl050_init(dev, 1); +} + +static void pl050_kbd_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + + k->init = pl050_init_keyboard; + dc->vmsd = &vmstate_pl050; +} + +static const TypeInfo pl050_kbd_info = { + .name = "pl050_keyboard", + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(pl050_state), + .class_init = pl050_kbd_class_init, +}; + +static void pl050_mouse_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + + k->init = pl050_init_mouse; + dc->vmsd = &vmstate_pl050; +} + +static const TypeInfo pl050_mouse_info = { + .name = "pl050_mouse", + .parent = TYPE_SYS_BUS_DEVICE, + .instance_size = sizeof(pl050_state), + .class_init = pl050_mouse_class_init, +}; + +static void pl050_register_types(void) +{ + type_register_static(&pl050_kbd_info); + type_register_static(&pl050_mouse_info); +} + +type_init(pl050_register_types) |