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