1 /* 2 * Arm PrimeCell PL050 Keyboard / Mouse Interface 3 * 4 * Copyright (c) 2006-2007 CodeSourcery. 5 * Written by Paul Brook 6 * 7 * This code is licensed under the GPL. 8 */ 9 10 #include "qemu/osdep.h" 11 #include "hw/sysbus.h" 12 #include "migration/vmstate.h" 13 #include "hw/input/ps2.h" 14 #include "hw/irq.h" 15 #include "qemu/log.h" 16 #include "qemu/module.h" 17 #include "qom/object.h" 18 19 #define TYPE_PL050 "pl050" 20 OBJECT_DECLARE_SIMPLE_TYPE(PL050State, PL050) 21 22 struct PL050State { 23 SysBusDevice parent_obj; 24 25 MemoryRegion iomem; 26 void *dev; 27 uint32_t cr; 28 uint32_t clk; 29 uint32_t last; 30 int pending; 31 qemu_irq irq; 32 bool is_mouse; 33 }; 34 35 static const VMStateDescription vmstate_pl050 = { 36 .name = "pl050", 37 .version_id = 2, 38 .minimum_version_id = 2, 39 .fields = (VMStateField[]) { 40 VMSTATE_UINT32(cr, PL050State), 41 VMSTATE_UINT32(clk, PL050State), 42 VMSTATE_UINT32(last, PL050State), 43 VMSTATE_INT32(pending, PL050State), 44 VMSTATE_END_OF_LIST() 45 } 46 }; 47 48 #define PL050_TXEMPTY (1 << 6) 49 #define PL050_TXBUSY (1 << 5) 50 #define PL050_RXFULL (1 << 4) 51 #define PL050_RXBUSY (1 << 3) 52 #define PL050_RXPARITY (1 << 2) 53 #define PL050_KMIC (1 << 1) 54 #define PL050_KMID (1 << 0) 55 56 static const unsigned char pl050_id[] = 57 { 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; 58 59 static void pl050_update(void *opaque, int level) 60 { 61 PL050State *s = (PL050State *)opaque; 62 int raise; 63 64 s->pending = level; 65 raise = (s->pending && (s->cr & 0x10) != 0) 66 || (s->cr & 0x08) != 0; 67 qemu_set_irq(s->irq, raise); 68 } 69 70 static uint64_t pl050_read(void *opaque, hwaddr offset, 71 unsigned size) 72 { 73 PL050State *s = (PL050State *)opaque; 74 if (offset >= 0xfe0 && offset < 0x1000) 75 return pl050_id[(offset - 0xfe0) >> 2]; 76 77 switch (offset >> 2) { 78 case 0: /* KMICR */ 79 return s->cr; 80 case 1: /* KMISTAT */ 81 { 82 uint8_t val; 83 uint32_t stat; 84 85 val = s->last; 86 val = val ^ (val >> 4); 87 val = val ^ (val >> 2); 88 val = (val ^ (val >> 1)) & 1; 89 90 stat = PL050_TXEMPTY; 91 if (val) 92 stat |= PL050_RXPARITY; 93 if (s->pending) 94 stat |= PL050_RXFULL; 95 96 return stat; 97 } 98 case 2: /* KMIDATA */ 99 if (s->pending) 100 s->last = ps2_read_data(s->dev); 101 return s->last; 102 case 3: /* KMICLKDIV */ 103 return s->clk; 104 case 4: /* KMIIR */ 105 return s->pending | 2; 106 default: 107 qemu_log_mask(LOG_GUEST_ERROR, 108 "pl050_read: Bad offset %x\n", (int)offset); 109 return 0; 110 } 111 } 112 113 static void pl050_write(void *opaque, hwaddr offset, 114 uint64_t value, unsigned size) 115 { 116 PL050State *s = (PL050State *)opaque; 117 switch (offset >> 2) { 118 case 0: /* KMICR */ 119 s->cr = value; 120 pl050_update(s, s->pending); 121 /* ??? Need to implement the enable/disable bit. */ 122 break; 123 case 2: /* KMIDATA */ 124 /* ??? This should toggle the TX interrupt line. */ 125 /* ??? This means kbd/mouse can block each other. */ 126 if (s->is_mouse) { 127 ps2_write_mouse(s->dev, value); 128 } else { 129 ps2_write_keyboard(s->dev, value); 130 } 131 break; 132 case 3: /* KMICLKDIV */ 133 s->clk = value; 134 return; 135 default: 136 qemu_log_mask(LOG_GUEST_ERROR, 137 "pl050_write: Bad offset %x\n", (int)offset); 138 } 139 } 140 static const MemoryRegionOps pl050_ops = { 141 .read = pl050_read, 142 .write = pl050_write, 143 .endianness = DEVICE_NATIVE_ENDIAN, 144 }; 145 146 static void pl050_realize(DeviceState *dev, Error **errp) 147 { 148 PL050State *s = PL050(dev); 149 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 150 151 memory_region_init_io(&s->iomem, OBJECT(s), &pl050_ops, s, "pl050", 0x1000); 152 sysbus_init_mmio(sbd, &s->iomem); 153 sysbus_init_irq(sbd, &s->irq); 154 if (s->is_mouse) { 155 s->dev = ps2_mouse_init(pl050_update, s); 156 } else { 157 s->dev = ps2_kbd_init(pl050_update, s); 158 } 159 } 160 161 static void pl050_keyboard_init(Object *obj) 162 { 163 PL050State *s = PL050(obj); 164 165 s->is_mouse = false; 166 } 167 168 static void pl050_mouse_init(Object *obj) 169 { 170 PL050State *s = PL050(obj); 171 172 s->is_mouse = true; 173 } 174 175 static const TypeInfo pl050_kbd_info = { 176 .name = "pl050_keyboard", 177 .parent = TYPE_PL050, 178 .instance_init = pl050_keyboard_init, 179 }; 180 181 static const TypeInfo pl050_mouse_info = { 182 .name = "pl050_mouse", 183 .parent = TYPE_PL050, 184 .instance_init = pl050_mouse_init, 185 }; 186 187 static void pl050_class_init(ObjectClass *oc, void *data) 188 { 189 DeviceClass *dc = DEVICE_CLASS(oc); 190 191 dc->realize = pl050_realize; 192 dc->vmsd = &vmstate_pl050; 193 } 194 195 static const TypeInfo pl050_type_info = { 196 .name = TYPE_PL050, 197 .parent = TYPE_SYS_BUS_DEVICE, 198 .instance_size = sizeof(PL050State), 199 .abstract = true, 200 .class_init = pl050_class_init, 201 }; 202 203 static void pl050_register_types(void) 204 { 205 type_register_static(&pl050_type_info); 206 type_register_static(&pl050_kbd_info); 207 type_register_static(&pl050_mouse_info); 208 } 209 210 type_init(pl050_register_types) 211