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 typedef struct PL050State PL050State; 21 #define PL050(obj) OBJECT_CHECK(PL050State, (obj), TYPE_PL050) 22 23 struct PL050State { 24 SysBusDevice parent_obj; 25 26 MemoryRegion iomem; 27 void *dev; 28 uint32_t cr; 29 uint32_t clk; 30 uint32_t last; 31 int pending; 32 qemu_irq irq; 33 bool is_mouse; 34 }; 35 36 static const VMStateDescription vmstate_pl050 = { 37 .name = "pl050", 38 .version_id = 2, 39 .minimum_version_id = 2, 40 .fields = (VMStateField[]) { 41 VMSTATE_UINT32(cr, PL050State), 42 VMSTATE_UINT32(clk, PL050State), 43 VMSTATE_UINT32(last, PL050State), 44 VMSTATE_INT32(pending, PL050State), 45 VMSTATE_END_OF_LIST() 46 } 47 }; 48 49 #define PL050_TXEMPTY (1 << 6) 50 #define PL050_TXBUSY (1 << 5) 51 #define PL050_RXFULL (1 << 4) 52 #define PL050_RXBUSY (1 << 3) 53 #define PL050_RXPARITY (1 << 2) 54 #define PL050_KMIC (1 << 1) 55 #define PL050_KMID (1 << 0) 56 57 static const unsigned char pl050_id[] = 58 { 0x50, 0x10, 0x04, 0x00, 0x0d, 0xf0, 0x05, 0xb1 }; 59 60 static void pl050_update(void *opaque, int level) 61 { 62 PL050State *s = (PL050State *)opaque; 63 int raise; 64 65 s->pending = level; 66 raise = (s->pending && (s->cr & 0x10) != 0) 67 || (s->cr & 0x08) != 0; 68 qemu_set_irq(s->irq, raise); 69 } 70 71 static uint64_t pl050_read(void *opaque, hwaddr offset, 72 unsigned size) 73 { 74 PL050State *s = (PL050State *)opaque; 75 if (offset >= 0xfe0 && offset < 0x1000) 76 return pl050_id[(offset - 0xfe0) >> 2]; 77 78 switch (offset >> 2) { 79 case 0: /* KMICR */ 80 return s->cr; 81 case 1: /* KMISTAT */ 82 { 83 uint8_t val; 84 uint32_t stat; 85 86 val = s->last; 87 val = val ^ (val >> 4); 88 val = val ^ (val >> 2); 89 val = (val ^ (val >> 1)) & 1; 90 91 stat = PL050_TXEMPTY; 92 if (val) 93 stat |= PL050_RXPARITY; 94 if (s->pending) 95 stat |= PL050_RXFULL; 96 97 return stat; 98 } 99 case 2: /* KMIDATA */ 100 if (s->pending) 101 s->last = ps2_read_data(s->dev); 102 return s->last; 103 case 3: /* KMICLKDIV */ 104 return s->clk; 105 case 4: /* KMIIR */ 106 return s->pending | 2; 107 default: 108 qemu_log_mask(LOG_GUEST_ERROR, 109 "pl050_read: Bad offset %x\n", (int)offset); 110 return 0; 111 } 112 } 113 114 static void pl050_write(void *opaque, hwaddr offset, 115 uint64_t value, unsigned size) 116 { 117 PL050State *s = (PL050State *)opaque; 118 switch (offset >> 2) { 119 case 0: /* KMICR */ 120 s->cr = value; 121 pl050_update(s, s->pending); 122 /* ??? Need to implement the enable/disable bit. */ 123 break; 124 case 2: /* KMIDATA */ 125 /* ??? This should toggle the TX interrupt line. */ 126 /* ??? This means kbd/mouse can block each other. */ 127 if (s->is_mouse) { 128 ps2_write_mouse(s->dev, value); 129 } else { 130 ps2_write_keyboard(s->dev, value); 131 } 132 break; 133 case 3: /* KMICLKDIV */ 134 s->clk = value; 135 return; 136 default: 137 qemu_log_mask(LOG_GUEST_ERROR, 138 "pl050_write: Bad offset %x\n", (int)offset); 139 } 140 } 141 static const MemoryRegionOps pl050_ops = { 142 .read = pl050_read, 143 .write = pl050_write, 144 .endianness = DEVICE_NATIVE_ENDIAN, 145 }; 146 147 static void pl050_realize(DeviceState *dev, Error **errp) 148 { 149 PL050State *s = PL050(dev); 150 SysBusDevice *sbd = SYS_BUS_DEVICE(dev); 151 152 memory_region_init_io(&s->iomem, OBJECT(s), &pl050_ops, s, "pl050", 0x1000); 153 sysbus_init_mmio(sbd, &s->iomem); 154 sysbus_init_irq(sbd, &s->irq); 155 if (s->is_mouse) { 156 s->dev = ps2_mouse_init(pl050_update, s); 157 } else { 158 s->dev = ps2_kbd_init(pl050_update, s); 159 } 160 } 161 162 static void pl050_keyboard_init(Object *obj) 163 { 164 PL050State *s = PL050(obj); 165 166 s->is_mouse = false; 167 } 168 169 static void pl050_mouse_init(Object *obj) 170 { 171 PL050State *s = PL050(obj); 172 173 s->is_mouse = true; 174 } 175 176 static const TypeInfo pl050_kbd_info = { 177 .name = "pl050_keyboard", 178 .parent = TYPE_PL050, 179 .instance_init = pl050_keyboard_init, 180 }; 181 182 static const TypeInfo pl050_mouse_info = { 183 .name = "pl050_mouse", 184 .parent = TYPE_PL050, 185 .instance_init = pl050_mouse_init, 186 }; 187 188 static void pl050_class_init(ObjectClass *oc, void *data) 189 { 190 DeviceClass *dc = DEVICE_CLASS(oc); 191 192 dc->realize = pl050_realize; 193 dc->vmsd = &vmstate_pl050; 194 } 195 196 static const TypeInfo pl050_type_info = { 197 .name = TYPE_PL050, 198 .parent = TYPE_SYS_BUS_DEVICE, 199 .instance_size = sizeof(PL050State), 200 .abstract = true, 201 .class_init = pl050_class_init, 202 }; 203 204 static void pl050_register_types(void) 205 { 206 type_register_static(&pl050_type_info); 207 type_register_static(&pl050_kbd_info); 208 type_register_static(&pl050_mouse_info); 209 } 210 211 type_init(pl050_register_types) 212