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