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25#include "qemu/osdep.h"
26#include "hw/hw.h"
27#include "hw/ppc/mac.h"
28#include "hw/input/adb.h"
29#include "hw/misc/mos6522.h"
30#include "hw/misc/macio/cuda.h"
31#include "qemu/timer.h"
32#include "sysemu/sysemu.h"
33#include "qemu/cutils.h"
34#include "qemu/log.h"
35#include "trace.h"
36
37
38#define TREQ 0x08
39#define TACK 0x10
40#define TIP 0x20
41
42
43#define ADB_PACKET 0
44#define CUDA_PACKET 1
45#define ERROR_PACKET 2
46#define TIMER_PACKET 3
47#define POWER_PACKET 4
48#define MACIIC_PACKET 5
49#define PMU_PACKET 6
50
51#define CUDA_TIMER_FREQ (4700000 / 6)
52
53
54#define RTC_OFFSET 2082844800
55
56static void cuda_receive_packet_from_host(CUDAState *s,
57 const uint8_t *data, int len);
58
59
60
61
62
63
64
65static uint64_t cuda_get_counter_value(MOS6522State *s, MOS6522Timer *ti)
66{
67 MOS6522CUDAState *mcs = container_of(s, MOS6522CUDAState, parent_obj);
68 CUDAState *cs = container_of(mcs, CUDAState, mos6522_cuda);
69
70
71 uint64_t tb_diff = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
72 cs->tb_frequency, NANOSECONDS_PER_SECOND) -
73 ti->load_time;
74
75 return (tb_diff * 0xBF401675E5DULL) / (cs->tb_frequency << 24);
76}
77
78static uint64_t cuda_get_load_time(MOS6522State *s, MOS6522Timer *ti)
79{
80 MOS6522CUDAState *mcs = container_of(s, MOS6522CUDAState, parent_obj);
81 CUDAState *cs = container_of(mcs, CUDAState, mos6522_cuda);
82
83 uint64_t load_time = muldiv64(qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL),
84 cs->tb_frequency, NANOSECONDS_PER_SECOND);
85 return load_time;
86}
87
88static void cuda_set_sr_int(void *opaque)
89{
90 CUDAState *s = opaque;
91 MOS6522CUDAState *mcs = &s->mos6522_cuda;
92 MOS6522State *ms = MOS6522(mcs);
93 MOS6522DeviceClass *mdc = MOS6522_DEVICE_GET_CLASS(ms);
94
95 mdc->set_sr_int(ms);
96}
97
98static void cuda_delay_set_sr_int(CUDAState *s)
99{
100 MOS6522CUDAState *mcs = &s->mos6522_cuda;
101 MOS6522State *ms = MOS6522(mcs);
102 MOS6522DeviceClass *mdc = MOS6522_DEVICE_GET_CLASS(ms);
103 int64_t expire;
104
105 if (ms->dirb == 0xff || s->sr_delay_ns == 0) {
106
107 mdc->set_sr_int(ms);
108 return;
109 }
110
111 trace_cuda_delay_set_sr_int();
112
113 expire = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + s->sr_delay_ns;
114 timer_mod(s->sr_delay_timer, expire);
115}
116
117
118static void cuda_update(CUDAState *s)
119{
120 MOS6522CUDAState *mcs = &s->mos6522_cuda;
121 MOS6522State *ms = MOS6522(mcs);
122 int packet_received, len;
123
124 packet_received = 0;
125 if (!(ms->b & TIP)) {
126
127
128 if (ms->acr & SR_OUT) {
129
130 if ((ms->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
131 if (s->data_out_index < sizeof(s->data_out)) {
132 trace_cuda_data_send(ms->sr);
133 s->data_out[s->data_out_index++] = ms->sr;
134 cuda_delay_set_sr_int(s);
135 }
136 }
137 } else {
138 if (s->data_in_index < s->data_in_size) {
139
140 if ((ms->b & (TACK | TIP)) != (s->last_b & (TACK | TIP))) {
141 ms->sr = s->data_in[s->data_in_index++];
142 trace_cuda_data_recv(ms->sr);
143
144 if (s->data_in_index >= s->data_in_size) {
145 ms->b = (ms->b | TREQ);
146 }
147 cuda_delay_set_sr_int(s);
148 }
149 }
150 }
151 } else {
152
153 if ((s->last_b & TIP) && (ms->b & TACK) != (s->last_b & TACK)) {
154
155 if (ms->b & TACK) {
156 ms->b = (ms->b | TREQ);
157 } else {
158 ms->b = (ms->b & ~TREQ);
159 }
160 cuda_delay_set_sr_int(s);
161 } else {
162 if (!(s->last_b & TIP)) {
163
164 packet_received = (s->data_out_index > 0);
165
166 cuda_delay_set_sr_int(s);
167 }
168
169 if (s->data_in_index < s->data_in_size) {
170 ms->b = (ms->b & ~TREQ);
171 }
172 }
173 }
174
175 s->last_acr = ms->acr;
176 s->last_b = ms->b;
177
178
179
180 if (packet_received) {
181 len = s->data_out_index;
182 s->data_out_index = 0;
183 cuda_receive_packet_from_host(s, s->data_out, len);
184 }
185}
186
187static void cuda_send_packet_to_host(CUDAState *s,
188 const uint8_t *data, int len)
189{
190 int i;
191
192 trace_cuda_packet_send(len);
193 for (i = 0; i < len; i++) {
194 trace_cuda_packet_send_data(i, data[i]);
195 }
196
197 memcpy(s->data_in, data, len);
198 s->data_in_size = len;
199 s->data_in_index = 0;
200 cuda_update(s);
201 cuda_delay_set_sr_int(s);
202}
203
204static void cuda_adb_poll(void *opaque)
205{
206 CUDAState *s = opaque;
207 uint8_t obuf[ADB_MAX_OUT_LEN + 2];
208 int olen;
209
210 olen = adb_poll(&s->adb_bus, obuf + 2, s->adb_poll_mask);
211 if (olen > 0) {
212 obuf[0] = ADB_PACKET;
213 obuf[1] = 0x40;
214 cuda_send_packet_to_host(s, obuf, olen + 2);
215 }
216 timer_mod(s->adb_poll_timer, qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
217 (NANOSECONDS_PER_SECOND / (1000 / s->autopoll_rate_ms)));
218}
219
220
221typedef struct CudaCommand {
222 uint8_t command;
223 const char *name;
224 bool (*handler)(CUDAState *s,
225 const uint8_t *in_args, int in_len,
226 uint8_t *out_args, int *out_len);
227} CudaCommand;
228
229static bool cuda_cmd_autopoll(CUDAState *s,
230 const uint8_t *in_data, int in_len,
231 uint8_t *out_data, int *out_len)
232{
233 int autopoll;
234
235 if (in_len != 1) {
236 return false;
237 }
238
239 autopoll = (in_data[0] != 0);
240 if (autopoll != s->autopoll) {
241 s->autopoll = autopoll;
242 if (autopoll) {
243 timer_mod(s->adb_poll_timer,
244 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
245 (NANOSECONDS_PER_SECOND / (1000 / s->autopoll_rate_ms)));
246 } else {
247 timer_del(s->adb_poll_timer);
248 }
249 }
250 return true;
251}
252
253static bool cuda_cmd_set_autorate(CUDAState *s,
254 const uint8_t *in_data, int in_len,
255 uint8_t *out_data, int *out_len)
256{
257 if (in_len != 1) {
258 return false;
259 }
260
261
262
263 if (in_data[0] == 0) {
264 return false;
265 }
266
267 s->autopoll_rate_ms = in_data[0];
268 if (s->autopoll) {
269 timer_mod(s->adb_poll_timer,
270 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
271 (NANOSECONDS_PER_SECOND / (1000 / s->autopoll_rate_ms)));
272 }
273 return true;
274}
275
276static bool cuda_cmd_set_device_list(CUDAState *s,
277 const uint8_t *in_data, int in_len,
278 uint8_t *out_data, int *out_len)
279{
280 if (in_len != 2) {
281 return false;
282 }
283
284 s->adb_poll_mask = (((uint16_t)in_data[0]) << 8) | in_data[1];
285 return true;
286}
287
288static bool cuda_cmd_powerdown(CUDAState *s,
289 const uint8_t *in_data, int in_len,
290 uint8_t *out_data, int *out_len)
291{
292 if (in_len != 0) {
293 return false;
294 }
295
296 qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
297 return true;
298}
299
300static bool cuda_cmd_reset_system(CUDAState *s,
301 const uint8_t *in_data, int in_len,
302 uint8_t *out_data, int *out_len)
303{
304 if (in_len != 0) {
305 return false;
306 }
307
308 qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
309 return true;
310}
311
312static bool cuda_cmd_set_file_server_flag(CUDAState *s,
313 const uint8_t *in_data, int in_len,
314 uint8_t *out_data, int *out_len)
315{
316 if (in_len != 1) {
317 return false;
318 }
319
320 qemu_log_mask(LOG_UNIMP,
321 "CUDA: unimplemented command FILE_SERVER_FLAG %d\n",
322 in_data[0]);
323 return true;
324}
325
326static bool cuda_cmd_set_power_message(CUDAState *s,
327 const uint8_t *in_data, int in_len,
328 uint8_t *out_data, int *out_len)
329{
330 if (in_len != 1) {
331 return false;
332 }
333
334 qemu_log_mask(LOG_UNIMP,
335 "CUDA: unimplemented command SET_POWER_MESSAGE %d\n",
336 in_data[0]);
337 return true;
338}
339
340static bool cuda_cmd_get_time(CUDAState *s,
341 const uint8_t *in_data, int in_len,
342 uint8_t *out_data, int *out_len)
343{
344 uint32_t ti;
345
346 if (in_len != 0) {
347 return false;
348 }
349
350 ti = s->tick_offset + (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
351 / NANOSECONDS_PER_SECOND);
352 out_data[0] = ti >> 24;
353 out_data[1] = ti >> 16;
354 out_data[2] = ti >> 8;
355 out_data[3] = ti;
356 *out_len = 4;
357 return true;
358}
359
360static bool cuda_cmd_set_time(CUDAState *s,
361 const uint8_t *in_data, int in_len,
362 uint8_t *out_data, int *out_len)
363{
364 uint32_t ti;
365
366 if (in_len != 4) {
367 return false;
368 }
369
370 ti = (((uint32_t)in_data[0]) << 24) + (((uint32_t)in_data[1]) << 16)
371 + (((uint32_t)in_data[2]) << 8) + in_data[3];
372 s->tick_offset = ti - (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL)
373 / NANOSECONDS_PER_SECOND);
374 return true;
375}
376
377static const CudaCommand handlers[] = {
378 { CUDA_AUTOPOLL, "AUTOPOLL", cuda_cmd_autopoll },
379 { CUDA_SET_AUTO_RATE, "SET_AUTO_RATE", cuda_cmd_set_autorate },
380 { CUDA_SET_DEVICE_LIST, "SET_DEVICE_LIST", cuda_cmd_set_device_list },
381 { CUDA_POWERDOWN, "POWERDOWN", cuda_cmd_powerdown },
382 { CUDA_RESET_SYSTEM, "RESET_SYSTEM", cuda_cmd_reset_system },
383 { CUDA_FILE_SERVER_FLAG, "FILE_SERVER_FLAG",
384 cuda_cmd_set_file_server_flag },
385 { CUDA_SET_POWER_MESSAGES, "SET_POWER_MESSAGES",
386 cuda_cmd_set_power_message },
387 { CUDA_GET_TIME, "GET_TIME", cuda_cmd_get_time },
388 { CUDA_SET_TIME, "SET_TIME", cuda_cmd_set_time },
389};
390
391static void cuda_receive_packet(CUDAState *s,
392 const uint8_t *data, int len)
393{
394 uint8_t obuf[16] = { CUDA_PACKET, 0, data[0] };
395 int i, out_len = 0;
396
397 for (i = 0; i < ARRAY_SIZE(handlers); i++) {
398 const CudaCommand *desc = &handlers[i];
399 if (desc->command == data[0]) {
400 trace_cuda_receive_packet_cmd(desc->name);
401 out_len = 0;
402 if (desc->handler(s, data + 1, len - 1, obuf + 3, &out_len)) {
403 cuda_send_packet_to_host(s, obuf, 3 + out_len);
404 } else {
405 qemu_log_mask(LOG_GUEST_ERROR,
406 "CUDA: %s: wrong parameters %d\n",
407 desc->name, len);
408 obuf[0] = ERROR_PACKET;
409 obuf[1] = 0x5;
410 obuf[2] = CUDA_PACKET;
411 obuf[3] = data[0];
412 cuda_send_packet_to_host(s, obuf, 4);
413 }
414 return;
415 }
416 }
417
418 qemu_log_mask(LOG_GUEST_ERROR, "CUDA: unknown command 0x%02x\n", data[0]);
419 obuf[0] = ERROR_PACKET;
420 obuf[1] = 0x2;
421 obuf[2] = CUDA_PACKET;
422 obuf[3] = data[0];
423 cuda_send_packet_to_host(s, obuf, 4);
424}
425
426static void cuda_receive_packet_from_host(CUDAState *s,
427 const uint8_t *data, int len)
428{
429 int i;
430
431 trace_cuda_packet_receive(len);
432 for (i = 0; i < len; i++) {
433 trace_cuda_packet_receive_data(i, data[i]);
434 }
435
436 switch(data[0]) {
437 case ADB_PACKET:
438 {
439 uint8_t obuf[ADB_MAX_OUT_LEN + 3];
440 int olen;
441 olen = adb_request(&s->adb_bus, obuf + 2, data + 1, len - 1);
442 if (olen > 0) {
443 obuf[0] = ADB_PACKET;
444 obuf[1] = 0x00;
445 cuda_send_packet_to_host(s, obuf, olen + 2);
446 } else {
447
448 obuf[0] = ADB_PACKET;
449 obuf[1] = -olen;
450 obuf[2] = data[1];
451 olen = 0;
452 cuda_send_packet_to_host(s, obuf, olen + 3);
453 }
454 }
455 break;
456 case CUDA_PACKET:
457 cuda_receive_packet(s, data + 1, len - 1);
458 break;
459 }
460}
461
462static uint64_t mos6522_cuda_read(void *opaque, hwaddr addr, unsigned size)
463{
464 CUDAState *s = opaque;
465 MOS6522CUDAState *mcs = &s->mos6522_cuda;
466 MOS6522State *ms = MOS6522(mcs);
467
468 addr = (addr >> 9) & 0xf;
469 return mos6522_read(ms, addr, size);
470}
471
472static void mos6522_cuda_write(void *opaque, hwaddr addr, uint64_t val,
473 unsigned size)
474{
475 CUDAState *s = opaque;
476 MOS6522CUDAState *mcs = &s->mos6522_cuda;
477 MOS6522State *ms = MOS6522(mcs);
478
479 addr = (addr >> 9) & 0xf;
480 mos6522_write(ms, addr, val, size);
481}
482
483static const MemoryRegionOps mos6522_cuda_ops = {
484 .read = mos6522_cuda_read,
485 .write = mos6522_cuda_write,
486 .endianness = DEVICE_BIG_ENDIAN,
487 .valid = {
488 .min_access_size = 1,
489 .max_access_size = 1,
490 },
491};
492
493static const VMStateDescription vmstate_cuda = {
494 .name = "cuda",
495 .version_id = 5,
496 .minimum_version_id = 5,
497 .fields = (VMStateField[]) {
498 VMSTATE_STRUCT(mos6522_cuda.parent_obj, CUDAState, 0, vmstate_mos6522,
499 MOS6522State),
500 VMSTATE_UINT8(last_b, CUDAState),
501 VMSTATE_UINT8(last_acr, CUDAState),
502 VMSTATE_INT32(data_in_size, CUDAState),
503 VMSTATE_INT32(data_in_index, CUDAState),
504 VMSTATE_INT32(data_out_index, CUDAState),
505 VMSTATE_UINT8(autopoll, CUDAState),
506 VMSTATE_UINT8(autopoll_rate_ms, CUDAState),
507 VMSTATE_UINT16(adb_poll_mask, CUDAState),
508 VMSTATE_BUFFER(data_in, CUDAState),
509 VMSTATE_BUFFER(data_out, CUDAState),
510 VMSTATE_UINT32(tick_offset, CUDAState),
511 VMSTATE_TIMER_PTR(adb_poll_timer, CUDAState),
512 VMSTATE_TIMER_PTR(sr_delay_timer, CUDAState),
513 VMSTATE_END_OF_LIST()
514 }
515};
516
517static void cuda_reset(DeviceState *dev)
518{
519 CUDAState *s = CUDA(dev);
520
521 s->data_in_size = 0;
522 s->data_in_index = 0;
523 s->data_out_index = 0;
524 s->autopoll = 0;
525}
526
527static void cuda_realize(DeviceState *dev, Error **errp)
528{
529 CUDAState *s = CUDA(dev);
530 SysBusDevice *sbd;
531 MOS6522State *ms;
532 DeviceState *d;
533 struct tm tm;
534
535
536 d = DEVICE(&s->mos6522_cuda);
537 ms = MOS6522(d);
538 sbd = SYS_BUS_DEVICE(s);
539 sysbus_pass_irq(sbd, SYS_BUS_DEVICE(ms));
540
541 qemu_get_timedate(&tm, 0);
542 s->tick_offset = (uint32_t)mktimegm(&tm) + RTC_OFFSET;
543
544 s->sr_delay_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, cuda_set_sr_int, s);
545 s->sr_delay_ns = 300 * SCALE_US;
546
547 s->adb_poll_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, cuda_adb_poll, s);
548 s->adb_poll_mask = 0xffff;
549 s->autopoll_rate_ms = 20;
550}
551
552static void cuda_init(Object *obj)
553{
554 CUDAState *s = CUDA(obj);
555 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
556
557 sysbus_init_child_obj(obj, "mos6522-cuda", &s->mos6522_cuda,
558 sizeof(s->mos6522_cuda), TYPE_MOS6522_CUDA);
559
560 memory_region_init_io(&s->mem, obj, &mos6522_cuda_ops, s, "cuda", 0x2000);
561 sysbus_init_mmio(sbd, &s->mem);
562
563 qbus_create_inplace(&s->adb_bus, sizeof(s->adb_bus), TYPE_ADB_BUS,
564 DEVICE(obj), "adb.0");
565}
566
567static Property cuda_properties[] = {
568 DEFINE_PROP_UINT64("timebase-frequency", CUDAState, tb_frequency, 0),
569 DEFINE_PROP_END_OF_LIST()
570};
571
572static void cuda_class_init(ObjectClass *oc, void *data)
573{
574 DeviceClass *dc = DEVICE_CLASS(oc);
575
576 dc->realize = cuda_realize;
577 dc->reset = cuda_reset;
578 dc->vmsd = &vmstate_cuda;
579 dc->props = cuda_properties;
580 set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
581}
582
583static const TypeInfo cuda_type_info = {
584 .name = TYPE_CUDA,
585 .parent = TYPE_SYS_BUS_DEVICE,
586 .instance_size = sizeof(CUDAState),
587 .instance_init = cuda_init,
588 .class_init = cuda_class_init,
589};
590
591static void mos6522_cuda_portB_write(MOS6522State *s)
592{
593 MOS6522CUDAState *mcs = container_of(s, MOS6522CUDAState, parent_obj);
594 CUDAState *cs = container_of(mcs, CUDAState, mos6522_cuda);
595
596 cuda_update(cs);
597}
598
599static void mos6522_cuda_reset(DeviceState *dev)
600{
601 MOS6522State *ms = MOS6522(dev);
602 MOS6522DeviceClass *mdc = MOS6522_DEVICE_GET_CLASS(ms);
603
604 mdc->parent_reset(dev);
605
606 ms->timers[0].frequency = CUDA_TIMER_FREQ;
607 ms->timers[1].frequency = (SCALE_US * 6000) / 4700;
608}
609
610static void mos6522_cuda_class_init(ObjectClass *oc, void *data)
611{
612 DeviceClass *dc = DEVICE_CLASS(oc);
613 MOS6522DeviceClass *mdc = MOS6522_DEVICE_CLASS(oc);
614
615 dc->reset = mos6522_cuda_reset;
616 mdc->portB_write = mos6522_cuda_portB_write;
617 mdc->get_timer1_counter_value = cuda_get_counter_value;
618 mdc->get_timer2_counter_value = cuda_get_counter_value;
619 mdc->get_timer1_load_time = cuda_get_load_time;
620 mdc->get_timer2_load_time = cuda_get_load_time;
621}
622
623static const TypeInfo mos6522_cuda_type_info = {
624 .name = TYPE_MOS6522_CUDA,
625 .parent = TYPE_MOS6522,
626 .instance_size = sizeof(MOS6522CUDAState),
627 .class_init = mos6522_cuda_class_init,
628};
629
630static void cuda_register_types(void)
631{
632 type_register_static(&mos6522_cuda_type_info);
633 type_register_static(&cuda_type_info);
634}
635
636type_init(cuda_register_types)
637