1 /* 2 * QEMU NeXT Keyboard/Mouse emulation 3 * 4 * Copyright (c) 2011 Bryce Lanham 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a copy 7 * of this software and associated documentation files (the "Software"), to deal 8 * in the Software without restriction, including without limitation the rights 9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 10 * copies of the Software, and to permit persons to whom the Software is 11 * furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice shall be included in 14 * all copies or substantial portions of the Software. 15 * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 22 * THE SOFTWARE. 23 */ 24 25 /* 26 * This is admittedly hackish, but works well enough for basic input. Mouse 27 * support will be added once we can boot something that needs the mouse. 28 */ 29 30 #include "qemu/osdep.h" 31 #include "qemu/log.h" 32 #include "hw/sysbus.h" 33 #include "hw/m68k/next-cube.h" 34 #include "ui/console.h" 35 #include "migration/vmstate.h" 36 #include "qom/object.h" 37 38 OBJECT_DECLARE_SIMPLE_TYPE(NextKBDState, NEXTKBD) 39 40 /* following definitions from next68k netbsd */ 41 #define CSR_INT 0x00800000 42 #define CSR_DATA 0x00400000 43 44 #define KD_KEYMASK 0x007f 45 #define KD_DIRECTION 0x0080 /* pressed or released */ 46 #define KD_CNTL 0x0100 47 #define KD_LSHIFT 0x0200 48 #define KD_RSHIFT 0x0400 49 #define KD_LCOMM 0x0800 50 #define KD_RCOMM 0x1000 51 #define KD_LALT 0x2000 52 #define KD_RALT 0x4000 53 #define KD_VALID 0x8000 /* only set for scancode keys ? */ 54 #define KD_MODS 0x4f00 55 56 #define KBD_QUEUE_SIZE 256 57 58 typedef struct { 59 uint8_t data[KBD_QUEUE_SIZE]; 60 int rptr, wptr, count; 61 } KBDQueue; 62 63 64 struct NextKBDState { 65 SysBusDevice sbd; 66 MemoryRegion mr; 67 KBDQueue queue; 68 uint16_t shift; 69 }; 70 71 static void queue_code(void *opaque, int code); 72 73 /* lots of magic numbers here */ 74 static uint32_t kbd_read_byte(void *opaque, hwaddr addr) 75 { 76 switch (addr & 0x3) { 77 case 0x0: /* 0xe000 */ 78 return 0x80 | 0x20; 79 80 case 0x1: /* 0xe001 */ 81 return 0x80 | 0x40 | 0x20 | 0x10; 82 83 case 0x2: /* 0xe002 */ 84 /* returning 0x40 caused mach to hang */ 85 return 0x10 | 0x2 | 0x1; 86 87 default: 88 qemu_log_mask(LOG_UNIMP, "NeXT kbd read byte %"HWADDR_PRIx"\n", addr); 89 } 90 91 return 0; 92 } 93 94 static uint32_t kbd_read_word(void *opaque, hwaddr addr) 95 { 96 qemu_log_mask(LOG_UNIMP, "NeXT kbd read word %"HWADDR_PRIx"\n", addr); 97 return 0; 98 } 99 100 /* even more magic numbers */ 101 static uint32_t kbd_read_long(void *opaque, hwaddr addr) 102 { 103 int key = 0; 104 NextKBDState *s = NEXTKBD(opaque); 105 KBDQueue *q = &s->queue; 106 107 switch (addr & 0xf) { 108 case 0x0: /* 0xe000 */ 109 return 0xA0F09300; 110 111 case 0x8: /* 0xe008 */ 112 /* get keycode from buffer */ 113 if (q->count > 0) { 114 key = q->data[q->rptr]; 115 if (++q->rptr == KBD_QUEUE_SIZE) { 116 q->rptr = 0; 117 } 118 119 q->count--; 120 121 if (s->shift) { 122 key |= s->shift; 123 } 124 125 if (key & 0x80) { 126 return 0; 127 } else { 128 return 0x10000000 | KD_VALID | key; 129 } 130 } else { 131 return 0; 132 } 133 134 default: 135 qemu_log_mask(LOG_UNIMP, "NeXT kbd read long %"HWADDR_PRIx"\n", addr); 136 return 0; 137 } 138 } 139 140 static uint64_t kbd_readfn(void *opaque, hwaddr addr, unsigned size) 141 { 142 switch (size) { 143 case 1: 144 return kbd_read_byte(opaque, addr); 145 case 2: 146 return kbd_read_word(opaque, addr); 147 case 4: 148 return kbd_read_long(opaque, addr); 149 default: 150 g_assert_not_reached(); 151 } 152 } 153 154 static void kbd_writefn(void *opaque, hwaddr addr, uint64_t value, 155 unsigned size) 156 { 157 qemu_log_mask(LOG_UNIMP, "NeXT kbd write: size=%u addr=0x%"HWADDR_PRIx 158 "val=0x%"PRIx64"\n", size, addr, value); 159 } 160 161 static const MemoryRegionOps kbd_ops = { 162 .read = kbd_readfn, 163 .write = kbd_writefn, 164 .valid.min_access_size = 1, 165 .valid.max_access_size = 4, 166 .endianness = DEVICE_NATIVE_ENDIAN, 167 }; 168 169 static void nextkbd_event(void *opaque, int ch) 170 { 171 /* 172 * Will want to set vars for caps/num lock 173 * if (ch & 0x80) -> key release 174 * there's also e0 escaped scancodes that might need to be handled 175 */ 176 queue_code(opaque, ch); 177 } 178 179 static const unsigned char next_keycodes[128] = { 180 0x00, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x50, 0x4F, 181 0x4E, 0x1E, 0x1F, 0x20, 0x1D, 0x1C, 0x1B, 0x00, 182 0x42, 0x43, 0x44, 0x45, 0x48, 0x47, 0x46, 0x06, 183 0x07, 0x08, 0x00, 0x00, 0x2A, 0x00, 0x39, 0x3A, 184 0x3B, 0x3C, 0x3D, 0x40, 0x3F, 0x3E, 0x2D, 0x2C, 185 0x2B, 0x26, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34, 186 0x35, 0x37, 0x36, 0x2e, 0x2f, 0x30, 0x00, 0x00, 187 0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 188 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 189 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 190 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 191 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 192 }; 193 194 static void queue_code(void *opaque, int code) 195 { 196 NextKBDState *s = NEXTKBD(opaque); 197 KBDQueue *q = &s->queue; 198 int key = code & KD_KEYMASK; 199 int release = code & 0x80; 200 static int ext; 201 202 if (code == 0xE0) { 203 ext = 1; 204 } 205 206 if (code == 0x2A || code == 0x1D || code == 0x36) { 207 if (code == 0x2A) { 208 s->shift = KD_LSHIFT; 209 } else if (code == 0x36) { 210 s->shift = KD_RSHIFT; 211 ext = 0; 212 } else if (code == 0x1D && !ext) { 213 s->shift = KD_LCOMM; 214 } else if (code == 0x1D && ext) { 215 ext = 0; 216 s->shift = KD_RCOMM; 217 } 218 return; 219 } else if (code == (0x2A | 0x80) || code == (0x1D | 0x80) || 220 code == (0x36 | 0x80)) { 221 s->shift = 0; 222 return; 223 } 224 225 if (q->count >= KBD_QUEUE_SIZE) { 226 return; 227 } 228 229 q->data[q->wptr] = next_keycodes[key] | release; 230 231 if (++q->wptr == KBD_QUEUE_SIZE) { 232 q->wptr = 0; 233 } 234 235 q->count++; 236 237 /* 238 * might need to actually trigger the NeXT irq, but as the keyboard works 239 * at the moment, I'll worry about it later 240 */ 241 /* s->update_irq(s->update_arg, 1); */ 242 } 243 244 static void nextkbd_reset(DeviceState *dev) 245 { 246 NextKBDState *nks = NEXTKBD(dev); 247 248 memset(&nks->queue, 0, sizeof(KBDQueue)); 249 nks->shift = 0; 250 } 251 252 static void nextkbd_realize(DeviceState *dev, Error **errp) 253 { 254 NextKBDState *s = NEXTKBD(dev); 255 256 memory_region_init_io(&s->mr, OBJECT(dev), &kbd_ops, s, "next.kbd", 0x1000); 257 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr); 258 259 qemu_add_kbd_event_handler(nextkbd_event, s); 260 } 261 262 static const VMStateDescription nextkbd_vmstate = { 263 .name = TYPE_NEXTKBD, 264 .unmigratable = 1, /* TODO: Implement this when m68k CPU is migratable */ 265 }; 266 267 static void nextkbd_class_init(ObjectClass *oc, void *data) 268 { 269 DeviceClass *dc = DEVICE_CLASS(oc); 270 271 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 272 dc->vmsd = &nextkbd_vmstate; 273 dc->realize = nextkbd_realize; 274 dc->reset = nextkbd_reset; 275 } 276 277 static const TypeInfo nextkbd_info = { 278 .name = TYPE_NEXTKBD, 279 .parent = TYPE_SYS_BUS_DEVICE, 280 .instance_size = sizeof(NextKBDState), 281 .class_init = nextkbd_class_init, 282 }; 283 284 static void nextkbd_register_types(void) 285 { 286 type_register_static(&nextkbd_info); 287 } 288 289 type_init(nextkbd_register_types) 290