1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20#include "qemu/osdep.h"
21#include "qemu/units.h"
22#include "hw/sysbus.h"
23#include "migration/vmstate.h"
24#include "qemu/log.h"
25#include "qemu/module.h"
26#include "qemu-common.h"
27#include "hw/qdev-properties.h"
28#include "hw/rtc/allwinner-rtc.h"
29#include "trace.h"
30
31
32enum {
33 REG_LOSC = 1,
34 REG_YYMMDD,
35 REG_HHMMSS,
36 REG_ALARM1_WKHHMMSS,
37 REG_ALARM1_EN,
38 REG_ALARM1_IRQ_EN,
39 REG_ALARM1_IRQ_STA,
40 REG_GP0,
41 REG_GP1,
42 REG_GP2,
43 REG_GP3,
44
45
46 REG_ALARM1_DDHHMMSS,
47 REG_CPUCFG,
48
49
50 REG_LOSC_AUTOSTA,
51 REG_INT_OSC_PRE,
52 REG_ALARM0_COUNTER,
53 REG_ALARM0_CUR_VLU,
54 REG_ALARM0_ENABLE,
55 REG_ALARM0_IRQ_EN,
56 REG_ALARM0_IRQ_STA,
57 REG_ALARM_CONFIG,
58 REG_LOSC_OUT_GATING,
59 REG_GP4,
60 REG_GP5,
61 REG_GP6,
62 REG_GP7,
63 REG_RTC_DBG,
64 REG_GPL_HOLD_OUT,
65 REG_VDD_RTC,
66 REG_IC_CHARA,
67};
68
69
70enum {
71 REG_LOSC_YMD = (1 << 7),
72 REG_LOSC_HMS = (1 << 8),
73};
74
75
76const uint8_t allwinner_rtc_sun4i_regmap[] = {
77 [0x0000] = REG_LOSC,
78 [0x0004] = REG_YYMMDD,
79 [0x0008] = REG_HHMMSS,
80 [0x000C] = REG_ALARM1_DDHHMMSS,
81 [0x0010] = REG_ALARM1_WKHHMMSS,
82 [0x0014] = REG_ALARM1_EN,
83 [0x0018] = REG_ALARM1_IRQ_EN,
84 [0x001C] = REG_ALARM1_IRQ_STA,
85 [0x0020] = REG_GP0,
86 [0x0024] = REG_GP1,
87 [0x0028] = REG_GP2,
88 [0x002C] = REG_GP3,
89 [0x003C] = REG_CPUCFG,
90};
91
92
93const uint8_t allwinner_rtc_sun6i_regmap[] = {
94 [0x0000] = REG_LOSC,
95 [0x0004] = REG_LOSC_AUTOSTA,
96 [0x0008] = REG_INT_OSC_PRE,
97 [0x0010] = REG_YYMMDD,
98 [0x0014] = REG_HHMMSS,
99 [0x0020] = REG_ALARM0_COUNTER,
100 [0x0024] = REG_ALARM0_CUR_VLU,
101 [0x0028] = REG_ALARM0_ENABLE,
102 [0x002C] = REG_ALARM0_IRQ_EN,
103 [0x0030] = REG_ALARM0_IRQ_STA,
104 [0x0040] = REG_ALARM1_WKHHMMSS,
105 [0x0044] = REG_ALARM1_EN,
106 [0x0048] = REG_ALARM1_IRQ_EN,
107 [0x004C] = REG_ALARM1_IRQ_STA,
108 [0x0050] = REG_ALARM_CONFIG,
109 [0x0060] = REG_LOSC_OUT_GATING,
110 [0x0100] = REG_GP0,
111 [0x0104] = REG_GP1,
112 [0x0108] = REG_GP2,
113 [0x010C] = REG_GP3,
114 [0x0110] = REG_GP4,
115 [0x0114] = REG_GP5,
116 [0x0118] = REG_GP6,
117 [0x011C] = REG_GP7,
118 [0x0170] = REG_RTC_DBG,
119 [0x0180] = REG_GPL_HOLD_OUT,
120 [0x0190] = REG_VDD_RTC,
121 [0x01F0] = REG_IC_CHARA,
122};
123
124static bool allwinner_rtc_sun4i_read(AwRtcState *s, uint32_t offset)
125{
126
127 return false;
128}
129
130static bool allwinner_rtc_sun4i_write(AwRtcState *s, uint32_t offset,
131 uint32_t data)
132{
133
134 return false;
135}
136
137static bool allwinner_rtc_sun6i_read(AwRtcState *s, uint32_t offset)
138{
139 const AwRtcClass *c = AW_RTC_GET_CLASS(s);
140
141 switch (c->regmap[offset]) {
142 case REG_GP4:
143 case REG_GP5:
144 case REG_GP6:
145 case REG_GP7:
146 return true;
147 default:
148 break;
149 }
150 return false;
151}
152
153static bool allwinner_rtc_sun6i_write(AwRtcState *s, uint32_t offset,
154 uint32_t data)
155{
156 const AwRtcClass *c = AW_RTC_GET_CLASS(s);
157
158 switch (c->regmap[offset]) {
159 case REG_GP4:
160 case REG_GP5:
161 case REG_GP6:
162 case REG_GP7:
163 return true;
164 default:
165 break;
166 }
167 return false;
168}
169
170static uint64_t allwinner_rtc_read(void *opaque, hwaddr offset,
171 unsigned size)
172{
173 AwRtcState *s = AW_RTC(opaque);
174 const AwRtcClass *c = AW_RTC_GET_CLASS(s);
175 uint64_t val = 0;
176
177 if (offset >= c->regmap_size) {
178 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
179 __func__, (uint32_t)offset);
180 return 0;
181 }
182
183 if (!c->regmap[offset]) {
184 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
185 __func__, (uint32_t)offset);
186 return 0;
187 }
188
189 switch (c->regmap[offset]) {
190 case REG_LOSC:
191 val = s->regs[REG_LOSC];
192 s->regs[REG_LOSC] &= ~(REG_LOSC_YMD | REG_LOSC_HMS);
193 break;
194 case REG_YYMMDD:
195 case REG_HHMMSS:
196 case REG_GP0:
197 case REG_GP1:
198 case REG_GP2:
199 case REG_GP3:
200 val = s->regs[c->regmap[offset]];
201 break;
202 default:
203 if (!c->read(s, offset)) {
204 qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
205 __func__, (uint32_t)offset);
206 }
207 val = s->regs[c->regmap[offset]];
208 break;
209 }
210
211 trace_allwinner_rtc_read(offset, val);
212 return val;
213}
214
215static void allwinner_rtc_write(void *opaque, hwaddr offset,
216 uint64_t val, unsigned size)
217{
218 AwRtcState *s = AW_RTC(opaque);
219 const AwRtcClass *c = AW_RTC_GET_CLASS(s);
220
221 if (offset >= c->regmap_size) {
222 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset 0x%04x\n",
223 __func__, (uint32_t)offset);
224 return;
225 }
226
227 if (!c->regmap[offset]) {
228 qemu_log_mask(LOG_GUEST_ERROR, "%s: invalid register 0x%04x\n",
229 __func__, (uint32_t)offset);
230 return;
231 }
232
233 trace_allwinner_rtc_write(offset, val);
234
235 switch (c->regmap[offset]) {
236 case REG_YYMMDD:
237 s->regs[REG_YYMMDD] = val;
238 s->regs[REG_LOSC] |= REG_LOSC_YMD;
239 break;
240 case REG_HHMMSS:
241 s->regs[REG_HHMMSS] = val;
242 s->regs[REG_LOSC] |= REG_LOSC_HMS;
243 break;
244 case REG_GP0:
245 case REG_GP1:
246 case REG_GP2:
247 case REG_GP3:
248 s->regs[c->regmap[offset]] = val;
249 break;
250 default:
251 if (!c->write(s, offset, val)) {
252 qemu_log_mask(LOG_UNIMP, "%s: unimplemented register 0x%04x\n",
253 __func__, (uint32_t)offset);
254 }
255 break;
256 }
257}
258
259static const MemoryRegionOps allwinner_rtc_ops = {
260 .read = allwinner_rtc_read,
261 .write = allwinner_rtc_write,
262 .endianness = DEVICE_NATIVE_ENDIAN,
263 .valid = {
264 .min_access_size = 4,
265 .max_access_size = 4,
266 },
267 .impl.min_access_size = 4,
268};
269
270static void allwinner_rtc_reset(DeviceState *dev)
271{
272 AwRtcState *s = AW_RTC(dev);
273 struct tm now;
274
275
276 memset(s->regs, 0, sizeof(s->regs));
277
278
279 qemu_get_timedate(&now, 0);
280
281
282 if (s->base_year > 1900) {
283 s->regs[REG_YYMMDD] = ((now.tm_year + 1900 - s->base_year) << 16) |
284 ((now.tm_mon + 1) << 8) |
285 now.tm_mday;
286 s->regs[REG_HHMMSS] = (((now.tm_wday + 6) % 7) << 29) |
287 (now.tm_hour << 16) |
288 (now.tm_min << 8) |
289 now.tm_sec;
290 }
291}
292
293static void allwinner_rtc_init(Object *obj)
294{
295 SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
296 AwRtcState *s = AW_RTC(obj);
297
298
299 memory_region_init_io(&s->iomem, OBJECT(s), &allwinner_rtc_ops, s,
300 TYPE_AW_RTC, 1 * KiB);
301 sysbus_init_mmio(sbd, &s->iomem);
302}
303
304static const VMStateDescription allwinner_rtc_vmstate = {
305 .name = "allwinner-rtc",
306 .version_id = 1,
307 .minimum_version_id = 1,
308 .fields = (VMStateField[]) {
309 VMSTATE_UINT32_ARRAY(regs, AwRtcState, AW_RTC_REGS_NUM),
310 VMSTATE_END_OF_LIST()
311 }
312};
313
314static Property allwinner_rtc_properties[] = {
315 DEFINE_PROP_INT32("base-year", AwRtcState, base_year, 0),
316 DEFINE_PROP_END_OF_LIST(),
317};
318
319static void allwinner_rtc_class_init(ObjectClass *klass, void *data)
320{
321 DeviceClass *dc = DEVICE_CLASS(klass);
322
323 dc->reset = allwinner_rtc_reset;
324 dc->vmsd = &allwinner_rtc_vmstate;
325 device_class_set_props(dc, allwinner_rtc_properties);
326}
327
328static void allwinner_rtc_sun4i_init(Object *obj)
329{
330 AwRtcState *s = AW_RTC(obj);
331 s->base_year = 2010;
332}
333
334static void allwinner_rtc_sun4i_class_init(ObjectClass *klass, void *data)
335{
336 AwRtcClass *arc = AW_RTC_CLASS(klass);
337
338 arc->regmap = allwinner_rtc_sun4i_regmap;
339 arc->regmap_size = sizeof(allwinner_rtc_sun4i_regmap);
340 arc->read = allwinner_rtc_sun4i_read;
341 arc->write = allwinner_rtc_sun4i_write;
342}
343
344static void allwinner_rtc_sun6i_init(Object *obj)
345{
346 AwRtcState *s = AW_RTC(obj);
347 s->base_year = 1970;
348}
349
350static void allwinner_rtc_sun6i_class_init(ObjectClass *klass, void *data)
351{
352 AwRtcClass *arc = AW_RTC_CLASS(klass);
353
354 arc->regmap = allwinner_rtc_sun6i_regmap;
355 arc->regmap_size = sizeof(allwinner_rtc_sun6i_regmap);
356 arc->read = allwinner_rtc_sun6i_read;
357 arc->write = allwinner_rtc_sun6i_write;
358}
359
360static void allwinner_rtc_sun7i_init(Object *obj)
361{
362 AwRtcState *s = AW_RTC(obj);
363 s->base_year = 1970;
364}
365
366static void allwinner_rtc_sun7i_class_init(ObjectClass *klass, void *data)
367{
368 AwRtcClass *arc = AW_RTC_CLASS(klass);
369 allwinner_rtc_sun4i_class_init(klass, arc);
370}
371
372static const TypeInfo allwinner_rtc_info = {
373 .name = TYPE_AW_RTC,
374 .parent = TYPE_SYS_BUS_DEVICE,
375 .instance_init = allwinner_rtc_init,
376 .instance_size = sizeof(AwRtcState),
377 .class_init = allwinner_rtc_class_init,
378 .class_size = sizeof(AwRtcClass),
379 .abstract = true,
380};
381
382static const TypeInfo allwinner_rtc_sun4i_info = {
383 .name = TYPE_AW_RTC_SUN4I,
384 .parent = TYPE_AW_RTC,
385 .class_init = allwinner_rtc_sun4i_class_init,
386 .instance_init = allwinner_rtc_sun4i_init,
387};
388
389static const TypeInfo allwinner_rtc_sun6i_info = {
390 .name = TYPE_AW_RTC_SUN6I,
391 .parent = TYPE_AW_RTC,
392 .class_init = allwinner_rtc_sun6i_class_init,
393 .instance_init = allwinner_rtc_sun6i_init,
394};
395
396static const TypeInfo allwinner_rtc_sun7i_info = {
397 .name = TYPE_AW_RTC_SUN7I,
398 .parent = TYPE_AW_RTC,
399 .class_init = allwinner_rtc_sun7i_class_init,
400 .instance_init = allwinner_rtc_sun7i_init,
401};
402
403static void allwinner_rtc_register(void)
404{
405 type_register_static(&allwinner_rtc_info);
406 type_register_static(&allwinner_rtc_sun4i_info);
407 type_register_static(&allwinner_rtc_sun6i_info);
408 type_register_static(&allwinner_rtc_sun7i_info);
409}
410
411type_init(allwinner_rtc_register)
412
