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 "exec/address-spaces.h" 33 #include "hw/hw.h" 34 #include "hw/sysbus.h" 35 #include "hw/m68k/next-cube.h" 36 #include "ui/console.h" 37 #include "sysemu/sysemu.h" 38 #include "migration/vmstate.h" 39 #include "qom/object.h" 40 41 OBJECT_DECLARE_SIMPLE_TYPE(NextKBDState, NEXTKBD) 42 43 /* following defintions from next68k netbsd */ 44 #define CSR_INT 0x00800000 45 #define CSR_DATA 0x00400000 46 47 #define KD_KEYMASK 0x007f 48 #define KD_DIRECTION 0x0080 /* pressed or released */ 49 #define KD_CNTL 0x0100 50 #define KD_LSHIFT 0x0200 51 #define KD_RSHIFT 0x0400 52 #define KD_LCOMM 0x0800 53 #define KD_RCOMM 0x1000 54 #define KD_LALT 0x2000 55 #define KD_RALT 0x4000 56 #define KD_VALID 0x8000 /* only set for scancode keys ? */ 57 #define KD_MODS 0x4f00 58 59 #define KBD_QUEUE_SIZE 256 60 61 typedef struct { 62 uint8_t data[KBD_QUEUE_SIZE]; 63 int rptr, wptr, count; 64 } KBDQueue; 65 66 67 struct NextKBDState { 68 SysBusDevice sbd; 69 MemoryRegion mr; 70 KBDQueue queue; 71 uint16_t shift; 72 }; 73 74 static void queue_code(void *opaque, int code); 75 76 /* lots of magic numbers here */ 77 static uint32_t kbd_read_byte(void *opaque, hwaddr addr) 78 { 79 switch (addr & 0x3) { 80 case 0x0: /* 0xe000 */ 81 return 0x80 | 0x20; 82 83 case 0x1: /* 0xe001 */ 84 return 0x80 | 0x40 | 0x20 | 0x10; 85 86 case 0x2: /* 0xe002 */ 87 /* returning 0x40 caused mach to hang */ 88 return 0x10 | 0x2 | 0x1; 89 90 default: 91 qemu_log_mask(LOG_UNIMP, "NeXT kbd read byte %"HWADDR_PRIx"\n", addr); 92 } 93 94 return 0; 95 } 96 97 static uint32_t kbd_read_word(void *opaque, hwaddr addr) 98 { 99 qemu_log_mask(LOG_UNIMP, "NeXT kbd read word %"HWADDR_PRIx"\n", addr); 100 return 0; 101 } 102 103 /* even more magic numbers */ 104 static uint32_t kbd_read_long(void *opaque, hwaddr addr) 105 { 106 int key = 0; 107 NextKBDState *s = NEXTKBD(opaque); 108 KBDQueue *q = &s->queue; 109 110 switch (addr & 0xf) { 111 case 0x0: /* 0xe000 */ 112 return 0xA0F09300; 113 114 case 0x8: /* 0xe008 */ 115 /* get keycode from buffer */ 116 if (q->count > 0) { 117 key = q->data[q->rptr]; 118 if (++q->rptr == KBD_QUEUE_SIZE) { 119 q->rptr = 0; 120 } 121 122 q->count--; 123 124 if (s->shift) { 125 key |= s->shift; 126 } 127 128 if (key & 0x80) { 129 return 0; 130 } else { 131 return 0x10000000 | KD_VALID | key; 132 } 133 } else { 134 return 0; 135 } 136 137 default: 138 qemu_log_mask(LOG_UNIMP, "NeXT kbd read long %"HWADDR_PRIx"\n", addr); 139 return 0; 140 } 141 } 142 143 static uint64_t kbd_readfn(void *opaque, hwaddr addr, unsigned size) 144 { 145 switch (size) { 146 case 1: 147 return kbd_read_byte(opaque, addr); 148 case 2: 149 return kbd_read_word(opaque, addr); 150 case 4: 151 return kbd_read_long(opaque, addr); 152 default: 153 g_assert_not_reached(); 154 } 155 } 156 157 static void kbd_writefn(void *opaque, hwaddr addr, uint64_t value, 158 unsigned size) 159 { 160 qemu_log_mask(LOG_UNIMP, "NeXT kbd write: size=%u addr=0x%"HWADDR_PRIx 161 "val=0x%"PRIx64"\n", size, addr, value); 162 } 163 164 static const MemoryRegionOps kbd_ops = { 165 .read = kbd_readfn, 166 .write = kbd_writefn, 167 .valid.min_access_size = 1, 168 .valid.max_access_size = 4, 169 .endianness = DEVICE_NATIVE_ENDIAN, 170 }; 171 172 static void nextkbd_event(void *opaque, int ch) 173 { 174 /* 175 * Will want to set vars for caps/num lock 176 * if (ch & 0x80) -> key release 177 * there's also e0 escaped scancodes that might need to be handled 178 */ 179 queue_code(opaque, ch); 180 } 181 182 static const unsigned char next_keycodes[128] = { 183 0x00, 0x49, 0x4A, 0x4B, 0x4C, 0x4D, 0x50, 0x4F, 184 0x4E, 0x1E, 0x1F, 0x20, 0x1D, 0x1C, 0x1B, 0x00, 185 0x42, 0x43, 0x44, 0x45, 0x48, 0x47, 0x46, 0x06, 186 0x07, 0x08, 0x00, 0x00, 0x2A, 0x00, 0x39, 0x3A, 187 0x3B, 0x3C, 0x3D, 0x40, 0x3F, 0x3E, 0x2D, 0x2C, 188 0x2B, 0x26, 0x00, 0x00, 0x31, 0x32, 0x33, 0x34, 189 0x35, 0x37, 0x36, 0x2e, 0x2f, 0x30, 0x00, 0x00, 190 0x00, 0x38, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 191 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 192 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 193 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 194 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 195 }; 196 197 static void queue_code(void *opaque, int code) 198 { 199 NextKBDState *s = NEXTKBD(opaque); 200 KBDQueue *q = &s->queue; 201 int key = code & KD_KEYMASK; 202 int release = code & 0x80; 203 static int ext; 204 205 if (code == 0xE0) { 206 ext = 1; 207 } 208 209 if (code == 0x2A || code == 0x1D || code == 0x36) { 210 if (code == 0x2A) { 211 s->shift = KD_LSHIFT; 212 } else if (code == 0x36) { 213 s->shift = KD_RSHIFT; 214 ext = 0; 215 } else if (code == 0x1D && !ext) { 216 s->shift = KD_LCOMM; 217 } else if (code == 0x1D && ext) { 218 ext = 0; 219 s->shift = KD_RCOMM; 220 } 221 return; 222 } else if (code == (0x2A | 0x80) || code == (0x1D | 0x80) || 223 code == (0x36 | 0x80)) { 224 s->shift = 0; 225 return; 226 } 227 228 if (q->count >= KBD_QUEUE_SIZE) { 229 return; 230 } 231 232 q->data[q->wptr] = next_keycodes[key] | release; 233 234 if (++q->wptr == KBD_QUEUE_SIZE) { 235 q->wptr = 0; 236 } 237 238 q->count++; 239 240 /* 241 * might need to actually trigger the NeXT irq, but as the keyboard works 242 * at the moment, I'll worry about it later 243 */ 244 /* s->update_irq(s->update_arg, 1); */ 245 } 246 247 static void nextkbd_reset(DeviceState *dev) 248 { 249 NextKBDState *nks = NEXTKBD(dev); 250 251 memset(&nks->queue, 0, sizeof(KBDQueue)); 252 nks->shift = 0; 253 } 254 255 static void nextkbd_realize(DeviceState *dev, Error **errp) 256 { 257 NextKBDState *s = NEXTKBD(dev); 258 259 memory_region_init_io(&s->mr, OBJECT(dev), &kbd_ops, s, "next.kbd", 0x1000); 260 sysbus_init_mmio(SYS_BUS_DEVICE(dev), &s->mr); 261 262 qemu_add_kbd_event_handler(nextkbd_event, s); 263 } 264 265 static const VMStateDescription nextkbd_vmstate = { 266 .name = TYPE_NEXTKBD, 267 .unmigratable = 1, /* TODO: Implement this when m68k CPU is migratable */ 268 }; 269 270 static void nextkbd_class_init(ObjectClass *oc, void *data) 271 { 272 DeviceClass *dc = DEVICE_CLASS(oc); 273 274 set_bit(DEVICE_CATEGORY_INPUT, dc->categories); 275 dc->vmsd = &nextkbd_vmstate; 276 dc->realize = nextkbd_realize; 277 dc->reset = nextkbd_reset; 278 } 279 280 static const TypeInfo nextkbd_info = { 281 .name = TYPE_NEXTKBD, 282 .parent = TYPE_SYS_BUS_DEVICE, 283 .instance_size = sizeof(NextKBDState), 284 .class_init = nextkbd_class_init, 285 }; 286 287 static void nextkbd_register_types(void) 288 { 289 type_register_static(&nextkbd_info); 290 } 291 292 type_init(nextkbd_register_types) 293