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11#include "qemu/osdep.h"
12#include "qapi/error.h"
13#include "qemu/log.h"
14#include "hw/irq.h"
15#include "hw/qdev-properties.h"
16#include "migration/vmstate.h"
17#include "hw/adc/aspeed_adc.h"
18#include "trace.h"
19
20#define ASPEED_ADC_MEMORY_REGION_SIZE 0x1000
21#define ASPEED_ADC_ENGINE_MEMORY_REGION_SIZE 0x100
22#define ASPEED_ADC_ENGINE_CH_EN_MASK 0xffff0000
23#define ASPEED_ADC_ENGINE_CH_EN(x) ((BIT(x)) << 16)
24#define ASPEED_ADC_ENGINE_INIT BIT(8)
25#define ASPEED_ADC_ENGINE_AUTO_COMP BIT(5)
26#define ASPEED_ADC_ENGINE_COMP BIT(4)
27#define ASPEED_ADC_ENGINE_MODE_MASK 0x0000000e
28#define ASPEED_ADC_ENGINE_MODE_OFF (0b000 << 1)
29#define ASPEED_ADC_ENGINE_MODE_STANDBY (0b001 << 1)
30#define ASPEED_ADC_ENGINE_MODE_NORMAL (0b111 << 1)
31#define ASPEED_ADC_ENGINE_EN BIT(0)
32#define ASPEED_ADC_HYST_EN BIT(31)
33
34#define ASPEED_ADC_L_MASK ((1 << 10) - 1)
35#define ASPEED_ADC_L(x) ((x) & ASPEED_ADC_L_MASK)
36#define ASPEED_ADC_H(x) (((x) >> 16) & ASPEED_ADC_L_MASK)
37#define ASPEED_ADC_LH_MASK (ASPEED_ADC_L_MASK << 16 | ASPEED_ADC_L_MASK)
38#define LOWER_CHANNEL_MASK ((1 << 10) - 1)
39#define LOWER_CHANNEL_DATA(x) ((x) & LOWER_CHANNEL_MASK)
40#define UPPER_CHANNEL_DATA(x) (((x) >> 16) & LOWER_CHANNEL_MASK)
41
42#define TO_REG(addr) (addr >> 2)
43
44#define ENGINE_CONTROL TO_REG(0x00)
45#define INTERRUPT_CONTROL TO_REG(0x04)
46#define VGA_DETECT_CONTROL TO_REG(0x08)
47#define CLOCK_CONTROL TO_REG(0x0C)
48#define DATA_CHANNEL_1_AND_0 TO_REG(0x10)
49#define DATA_CHANNEL_7_AND_6 TO_REG(0x1C)
50#define DATA_CHANNEL_9_AND_8 TO_REG(0x20)
51#define DATA_CHANNEL_15_AND_14 TO_REG(0x2C)
52#define BOUNDS_CHANNEL_0 TO_REG(0x30)
53#define BOUNDS_CHANNEL_7 TO_REG(0x4C)
54#define BOUNDS_CHANNEL_8 TO_REG(0x50)
55#define BOUNDS_CHANNEL_15 TO_REG(0x6C)
56#define HYSTERESIS_CHANNEL_0 TO_REG(0x70)
57#define HYSTERESIS_CHANNEL_7 TO_REG(0x8C)
58#define HYSTERESIS_CHANNEL_8 TO_REG(0x90)
59#define HYSTERESIS_CHANNEL_15 TO_REG(0xAC)
60#define INTERRUPT_SOURCE TO_REG(0xC0)
61#define COMPENSATING_AND_TRIMMING TO_REG(0xC4)
62
63static inline uint32_t update_channels(uint32_t current)
64{
65 return ((((current >> 16) & ASPEED_ADC_L_MASK) + 7) << 16) |
66 ((current + 5) & ASPEED_ADC_L_MASK);
67}
68
69static bool breaks_threshold(AspeedADCEngineState *s, int reg)
70{
71 assert(reg >= DATA_CHANNEL_1_AND_0 &&
72 reg < DATA_CHANNEL_1_AND_0 + s->nr_channels / 2);
73
74 int a_bounds_reg = BOUNDS_CHANNEL_0 + (reg - DATA_CHANNEL_1_AND_0) * 2;
75 int b_bounds_reg = a_bounds_reg + 1;
76 uint32_t a_and_b = s->regs[reg];
77 uint32_t a_bounds = s->regs[a_bounds_reg];
78 uint32_t b_bounds = s->regs[b_bounds_reg];
79 uint32_t a = ASPEED_ADC_L(a_and_b);
80 uint32_t b = ASPEED_ADC_H(a_and_b);
81 uint32_t a_lower = ASPEED_ADC_L(a_bounds);
82 uint32_t a_upper = ASPEED_ADC_H(a_bounds);
83 uint32_t b_lower = ASPEED_ADC_L(b_bounds);
84 uint32_t b_upper = ASPEED_ADC_H(b_bounds);
85
86 return (a < a_lower || a > a_upper) ||
87 (b < b_lower || b > b_upper);
88}
89
90static uint32_t read_channel_sample(AspeedADCEngineState *s, int reg)
91{
92 assert(reg >= DATA_CHANNEL_1_AND_0 &&
93 reg < DATA_CHANNEL_1_AND_0 + s->nr_channels / 2);
94
95
96 uint32_t value = s->regs[reg];
97 s->regs[reg] = update_channels(s->regs[reg]);
98
99 if (breaks_threshold(s, reg)) {
100 s->regs[INTERRUPT_CONTROL] |= BIT(reg - DATA_CHANNEL_1_AND_0);
101 qemu_irq_raise(s->irq);
102 }
103
104 return value;
105}
106
107static uint64_t aspeed_adc_engine_read(void *opaque, hwaddr addr,
108 unsigned int size)
109{
110 AspeedADCEngineState *s = ASPEED_ADC_ENGINE(opaque);
111 int reg = TO_REG(addr);
112 uint32_t value = 0;
113
114 switch (reg) {
115 case BOUNDS_CHANNEL_8 ... BOUNDS_CHANNEL_15:
116 if (s->nr_channels <= 8) {
117 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
118 "bounds register %u invalid, only 0...7 valid\n",
119 __func__, s->engine_id, reg - BOUNDS_CHANNEL_0);
120 break;
121 }
122
123 case HYSTERESIS_CHANNEL_8 ... HYSTERESIS_CHANNEL_15:
124 if (s->nr_channels <= 8) {
125 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
126 "hysteresis register %u invalid, only 0...7 valid\n",
127 __func__, s->engine_id, reg - HYSTERESIS_CHANNEL_0);
128 break;
129 }
130
131 case BOUNDS_CHANNEL_0 ... BOUNDS_CHANNEL_7:
132 case HYSTERESIS_CHANNEL_0 ... HYSTERESIS_CHANNEL_7:
133 case ENGINE_CONTROL:
134 case INTERRUPT_CONTROL:
135 case VGA_DETECT_CONTROL:
136 case CLOCK_CONTROL:
137 case INTERRUPT_SOURCE:
138 case COMPENSATING_AND_TRIMMING:
139 value = s->regs[reg];
140 break;
141 case DATA_CHANNEL_9_AND_8 ... DATA_CHANNEL_15_AND_14:
142 if (s->nr_channels <= 8) {
143 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
144 "data register %u invalid, only 0...3 valid\n",
145 __func__, s->engine_id, reg - DATA_CHANNEL_1_AND_0);
146 break;
147 }
148
149 case DATA_CHANNEL_1_AND_0 ... DATA_CHANNEL_7_AND_6:
150 value = read_channel_sample(s, reg);
151
152 if (addr & 0x2) {
153 assert(size == 2);
154 value >>= 16;
155 }
156 break;
157 default:
158 qemu_log_mask(LOG_UNIMP, "%s: engine[%u]: 0x%" HWADDR_PRIx "\n",
159 __func__, s->engine_id, addr);
160 break;
161 }
162
163 trace_aspeed_adc_engine_read(s->engine_id, addr, value);
164 return value;
165}
166
167static void aspeed_adc_engine_write(void *opaque, hwaddr addr, uint64_t value,
168 unsigned int size)
169{
170 AspeedADCEngineState *s = ASPEED_ADC_ENGINE(opaque);
171 int reg = TO_REG(addr);
172 uint32_t init = 0;
173
174 trace_aspeed_adc_engine_write(s->engine_id, addr, value);
175
176 switch (reg) {
177 case ENGINE_CONTROL:
178 init = !!(value & ASPEED_ADC_ENGINE_EN);
179 init *= ASPEED_ADC_ENGINE_INIT;
180
181 value &= ~ASPEED_ADC_ENGINE_INIT;
182 value |= init;
183
184 value &= ~ASPEED_ADC_ENGINE_AUTO_COMP;
185 break;
186 case INTERRUPT_CONTROL:
187 case VGA_DETECT_CONTROL:
188 case CLOCK_CONTROL:
189 break;
190 case DATA_CHANNEL_9_AND_8 ... DATA_CHANNEL_15_AND_14:
191 if (s->nr_channels <= 8) {
192 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
193 "data register %u invalid, only 0...3 valid\n",
194 __func__, s->engine_id, reg - DATA_CHANNEL_1_AND_0);
195 return;
196 }
197
198 case BOUNDS_CHANNEL_8 ... BOUNDS_CHANNEL_15:
199 if (s->nr_channels <= 8) {
200 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
201 "bounds register %u invalid, only 0...7 valid\n",
202 __func__, s->engine_id, reg - BOUNDS_CHANNEL_0);
203 return;
204 }
205
206 case DATA_CHANNEL_1_AND_0 ... DATA_CHANNEL_7_AND_6:
207 case BOUNDS_CHANNEL_0 ... BOUNDS_CHANNEL_7:
208 value &= ASPEED_ADC_LH_MASK;
209 break;
210 case HYSTERESIS_CHANNEL_8 ... HYSTERESIS_CHANNEL_15:
211 if (s->nr_channels <= 8) {
212 qemu_log_mask(LOG_GUEST_ERROR, "%s: engine[%u]: "
213 "hysteresis register %u invalid, only 0...7 valid\n",
214 __func__, s->engine_id, reg - HYSTERESIS_CHANNEL_0);
215 return;
216 }
217
218 case HYSTERESIS_CHANNEL_0 ... HYSTERESIS_CHANNEL_7:
219 value &= (ASPEED_ADC_HYST_EN | ASPEED_ADC_LH_MASK);
220 break;
221 case INTERRUPT_SOURCE:
222 value &= 0xffff;
223 break;
224 case COMPENSATING_AND_TRIMMING:
225 value &= 0xf;
226 break;
227 default:
228 qemu_log_mask(LOG_UNIMP, "%s: engine[%u]: "
229 "0x%" HWADDR_PRIx " 0x%" PRIx64 "\n",
230 __func__, s->engine_id, addr, value);
231 break;
232 }
233
234 s->regs[reg] = value;
235}
236
237static const MemoryRegionOps aspeed_adc_engine_ops = {
238 .read = aspeed_adc_engine_read,
239 .write = aspeed_adc_engine_write,
240 .endianness = DEVICE_LITTLE_ENDIAN,
241 .valid = {
242 .min_access_size = 2,
243 .max_access_size = 4,
244 .unaligned = false,
245 },
246};
247
248static const uint32_t aspeed_adc_resets[ASPEED_ADC_NR_REGS] = {
249 [ENGINE_CONTROL] = 0x00000000,
250 [INTERRUPT_CONTROL] = 0x00000000,
251 [VGA_DETECT_CONTROL] = 0x0000000f,
252 [CLOCK_CONTROL] = 0x0000000f,
253};
254
255static void aspeed_adc_engine_reset(DeviceState *dev)
256{
257 AspeedADCEngineState *s = ASPEED_ADC_ENGINE(dev);
258
259 memcpy(s->regs, aspeed_adc_resets, sizeof(aspeed_adc_resets));
260}
261
262static void aspeed_adc_engine_realize(DeviceState *dev, Error **errp)
263{
264 AspeedADCEngineState *s = ASPEED_ADC_ENGINE(dev);
265 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
266 g_autofree char *name = g_strdup_printf(TYPE_ASPEED_ADC_ENGINE ".%d",
267 s->engine_id);
268
269 assert(s->engine_id < 2);
270
271 sysbus_init_irq(sbd, &s->irq);
272
273 memory_region_init_io(&s->mmio, OBJECT(s), &aspeed_adc_engine_ops, s, name,
274 ASPEED_ADC_ENGINE_MEMORY_REGION_SIZE);
275
276 sysbus_init_mmio(sbd, &s->mmio);
277}
278
279static const VMStateDescription vmstate_aspeed_adc_engine = {
280 .name = TYPE_ASPEED_ADC,
281 .version_id = 1,
282 .minimum_version_id = 1,
283 .fields = (VMStateField[]) {
284 VMSTATE_UINT32_ARRAY(regs, AspeedADCEngineState, ASPEED_ADC_NR_REGS),
285 VMSTATE_END_OF_LIST(),
286 }
287};
288
289static Property aspeed_adc_engine_properties[] = {
290 DEFINE_PROP_UINT32("engine-id", AspeedADCEngineState, engine_id, 0),
291 DEFINE_PROP_UINT32("nr-channels", AspeedADCEngineState, nr_channels, 0),
292 DEFINE_PROP_END_OF_LIST(),
293};
294
295static void aspeed_adc_engine_class_init(ObjectClass *klass, void *data)
296{
297 DeviceClass *dc = DEVICE_CLASS(klass);
298
299 dc->realize = aspeed_adc_engine_realize;
300 dc->reset = aspeed_adc_engine_reset;
301 device_class_set_props(dc, aspeed_adc_engine_properties);
302 dc->desc = "Aspeed Analog-to-Digital Engine";
303 dc->vmsd = &vmstate_aspeed_adc_engine;
304}
305
306static const TypeInfo aspeed_adc_engine_info = {
307 .name = TYPE_ASPEED_ADC_ENGINE,
308 .parent = TYPE_SYS_BUS_DEVICE,
309 .instance_size = sizeof(AspeedADCEngineState),
310 .class_init = aspeed_adc_engine_class_init,
311};
312
313static void aspeed_adc_instance_init(Object *obj)
314{
315 AspeedADCState *s = ASPEED_ADC(obj);
316 AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(obj);
317 uint32_t nr_channels = ASPEED_ADC_NR_CHANNELS / aac->nr_engines;
318
319 for (int i = 0; i < aac->nr_engines; i++) {
320 AspeedADCEngineState *engine = &s->engines[i];
321 object_initialize_child(obj, "engine[*]", engine,
322 TYPE_ASPEED_ADC_ENGINE);
323 qdev_prop_set_uint32(DEVICE(engine), "engine-id", i);
324 qdev_prop_set_uint32(DEVICE(engine), "nr-channels", nr_channels);
325 }
326}
327
328static void aspeed_adc_set_irq(void *opaque, int n, int level)
329{
330 AspeedADCState *s = opaque;
331 AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(s);
332 uint32_t pending = 0;
333
334
335 for (int i = 0; i < aac->nr_engines; i++) {
336 uint32_t irq_status = s->engines[i].regs[INTERRUPT_CONTROL] & 0xFF;
337 pending |= irq_status << (i * 8);
338 }
339
340 qemu_set_irq(s->irq, !!pending);
341}
342
343static void aspeed_adc_realize(DeviceState *dev, Error **errp)
344{
345 AspeedADCState *s = ASPEED_ADC(dev);
346 SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
347 AspeedADCClass *aac = ASPEED_ADC_GET_CLASS(dev);
348
349 qdev_init_gpio_in_named_with_opaque(DEVICE(sbd), aspeed_adc_set_irq,
350 s, NULL, aac->nr_engines);
351
352 sysbus_init_irq(sbd, &s->irq);
353
354 memory_region_init(&s->mmio, OBJECT(s), TYPE_ASPEED_ADC,
355 ASPEED_ADC_MEMORY_REGION_SIZE);
356
357 sysbus_init_mmio(sbd, &s->mmio);
358
359 for (int i = 0; i < aac->nr_engines; i++) {
360 Object *eng = OBJECT(&s->engines[i]);
361
362 if (!sysbus_realize(SYS_BUS_DEVICE(eng), errp)) {
363 return;
364 }
365 sysbus_connect_irq(SYS_BUS_DEVICE(eng), 0,
366 qdev_get_gpio_in(DEVICE(sbd), i));
367 memory_region_add_subregion(&s->mmio,
368 i * ASPEED_ADC_ENGINE_MEMORY_REGION_SIZE,
369 &s->engines[i].mmio);
370 }
371}
372
373static void aspeed_adc_class_init(ObjectClass *klass, void *data)
374{
375 DeviceClass *dc = DEVICE_CLASS(klass);
376 AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
377
378 dc->realize = aspeed_adc_realize;
379 dc->desc = "Aspeed Analog-to-Digital Converter";
380 aac->nr_engines = 1;
381}
382
383static void aspeed_2600_adc_class_init(ObjectClass *klass, void *data)
384{
385 DeviceClass *dc = DEVICE_CLASS(klass);
386 AspeedADCClass *aac = ASPEED_ADC_CLASS(klass);
387
388 dc->desc = "ASPEED 2600 ADC Controller";
389 aac->nr_engines = 2;
390}
391
392static const TypeInfo aspeed_adc_info = {
393 .name = TYPE_ASPEED_ADC,
394 .parent = TYPE_SYS_BUS_DEVICE,
395 .instance_init = aspeed_adc_instance_init,
396 .instance_size = sizeof(AspeedADCState),
397 .class_init = aspeed_adc_class_init,
398 .class_size = sizeof(AspeedADCClass),
399 .abstract = true,
400};
401
402static const TypeInfo aspeed_2400_adc_info = {
403 .name = TYPE_ASPEED_2400_ADC,
404 .parent = TYPE_ASPEED_ADC,
405};
406
407static const TypeInfo aspeed_2500_adc_info = {
408 .name = TYPE_ASPEED_2500_ADC,
409 .parent = TYPE_ASPEED_ADC,
410};
411
412static const TypeInfo aspeed_2600_adc_info = {
413 .name = TYPE_ASPEED_2600_ADC,
414 .parent = TYPE_ASPEED_ADC,
415 .class_init = aspeed_2600_adc_class_init,
416};
417
418static void aspeed_adc_register_types(void)
419{
420 type_register_static(&aspeed_adc_engine_info);
421 type_register_static(&aspeed_adc_info);
422 type_register_static(&aspeed_2400_adc_info);
423 type_register_static(&aspeed_2500_adc_info);
424 type_register_static(&aspeed_2600_adc_info);
425}
426
427type_init(aspeed_adc_register_types);
428
