| /* |
| * 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/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 = 1, |
| .minimum_version_id = 1, |
| .fields = (VMStateField[]) { |
| VMSTATE_UINT32(cr, pl050_state), |
| VMSTATE_UINT32(clk, pl050_state), |
| VMSTATE_UINT32(last, pl050_state), |
| VMSTATE_INT32(pending, pl050_state), |
| VMSTATE_INT32(is_mouse, 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) |