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