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