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11#include "qemu/osdep.h"
12#include "qemu/module.h"
13#include "qemu/units.h"
14#include "qapi/error.h"
15#include "exec/memory.h"
16#include "exec/address-spaces.h"
17#include "sysemu/sysemu.h"
18#include "hw/qdev-properties.h"
19#include "hw/sysbus.h"
20#include "hw/boards.h"
21#include "hw/misc/unimp.h"
22#include "atmega.h"
23
24enum AtmegaPeripheral {
25 POWER0, POWER1,
26 GPIOA, GPIOB, GPIOC, GPIOD, GPIOE, GPIOF,
27 GPIOG, GPIOH, GPIOI, GPIOJ, GPIOK, GPIOL,
28 USART0, USART1, USART2, USART3,
29 TIMER0, TIMER1, TIMER2, TIMER3, TIMER4, TIMER5,
30 PERIFMAX
31};
32
33#define GPIO(n) (n + GPIOA)
34#define USART(n) (n + USART0)
35#define TIMER(n) (n + TIMER0)
36#define POWER(n) (n + POWER0)
37
38typedef struct {
39 uint16_t addr;
40 enum AtmegaPeripheral power_index;
41 uint8_t power_bit;
42
43 uint16_t intmask_addr;
44 uint16_t intflag_addr;
45 bool is_timer16;
46} peripheral_cfg;
47
48typedef struct AtmegaMcuClass {
49
50 SysBusDeviceClass parent_class;
51
52 const char *uc_name;
53 const char *cpu_type;
54 size_t flash_size;
55 size_t eeprom_size;
56 size_t sram_size;
57 size_t io_size;
58 size_t gpio_count;
59 size_t adc_count;
60 const uint8_t *irq;
61 const peripheral_cfg *dev;
62} AtmegaMcuClass;
63
64#define ATMEGA_MCU_CLASS(klass) \
65 OBJECT_CLASS_CHECK(AtmegaMcuClass, (klass), TYPE_ATMEGA_MCU)
66#define ATMEGA_MCU_GET_CLASS(obj) \
67 OBJECT_GET_CLASS(AtmegaMcuClass, (obj), TYPE_ATMEGA_MCU)
68
69static const peripheral_cfg dev168_328[PERIFMAX] = {
70 [USART0] = { 0xc0, POWER0, 1 },
71 [TIMER2] = { 0xb0, POWER0, 6, 0x70, 0x37, false },
72 [TIMER1] = { 0x80, POWER0, 3, 0x6f, 0x36, true },
73 [POWER0] = { 0x64 },
74 [TIMER0] = { 0x44, POWER0, 5, 0x6e, 0x35, false },
75 [GPIOD] = { 0x29 },
76 [GPIOC] = { 0x26 },
77 [GPIOB] = { 0x23 },
78}, dev1280_2560[PERIFMAX] = {
79 [USART3] = { 0x130, POWER1, 2 },
80 [TIMER5] = { 0x120, POWER1, 5, 0x73, 0x3a, true },
81 [GPIOL] = { 0x109 },
82 [GPIOK] = { 0x106 },
83 [GPIOJ] = { 0x103 },
84 [GPIOH] = { 0x100 },
85 [USART2] = { 0xd0, POWER1, 1 },
86 [USART1] = { 0xc8, POWER1, 0 },
87 [USART0] = { 0xc0, POWER0, 1 },
88 [TIMER2] = { 0xb0, POWER0, 6, 0x70, 0x37, false },
89 [TIMER4] = { 0xa0, POWER1, 4, 0x72, 0x39, true },
90 [TIMER3] = { 0x90, POWER1, 3, 0x71, 0x38, true },
91 [TIMER1] = { 0x80, POWER0, 3, 0x6f, 0x36, true },
92 [POWER1] = { 0x65 },
93 [POWER0] = { 0x64 },
94 [TIMER0] = { 0x44, POWER0, 5, 0x6e, 0x35, false },
95 [GPIOG] = { 0x32 },
96 [GPIOF] = { 0x2f },
97 [GPIOE] = { 0x2c },
98 [GPIOD] = { 0x29 },
99 [GPIOC] = { 0x26 },
100 [GPIOB] = { 0x23 },
101 [GPIOA] = { 0x20 },
102};
103
104enum AtmegaIrq {
105 USART0_RXC_IRQ, USART0_DRE_IRQ, USART0_TXC_IRQ,
106 USART1_RXC_IRQ, USART1_DRE_IRQ, USART1_TXC_IRQ,
107 USART2_RXC_IRQ, USART2_DRE_IRQ, USART2_TXC_IRQ,
108 USART3_RXC_IRQ, USART3_DRE_IRQ, USART3_TXC_IRQ,
109 TIMER0_CAPT_IRQ, TIMER0_COMPA_IRQ, TIMER0_COMPB_IRQ,
110 TIMER0_COMPC_IRQ, TIMER0_OVF_IRQ,
111 TIMER1_CAPT_IRQ, TIMER1_COMPA_IRQ, TIMER1_COMPB_IRQ,
112 TIMER1_COMPC_IRQ, TIMER1_OVF_IRQ,
113 TIMER2_CAPT_IRQ, TIMER2_COMPA_IRQ, TIMER2_COMPB_IRQ,
114 TIMER2_COMPC_IRQ, TIMER2_OVF_IRQ,
115 TIMER3_CAPT_IRQ, TIMER3_COMPA_IRQ, TIMER3_COMPB_IRQ,
116 TIMER3_COMPC_IRQ, TIMER3_OVF_IRQ,
117 TIMER4_CAPT_IRQ, TIMER4_COMPA_IRQ, TIMER4_COMPB_IRQ,
118 TIMER4_COMPC_IRQ, TIMER4_OVF_IRQ,
119 TIMER5_CAPT_IRQ, TIMER5_COMPA_IRQ, TIMER5_COMPB_IRQ,
120 TIMER5_COMPC_IRQ, TIMER5_OVF_IRQ,
121 IRQ_COUNT
122};
123
124#define USART_IRQ_COUNT 3
125#define USART_RXC_IRQ(n) (n * USART_IRQ_COUNT + USART0_RXC_IRQ)
126#define USART_DRE_IRQ(n) (n * USART_IRQ_COUNT + USART0_DRE_IRQ)
127#define USART_TXC_IRQ(n) (n * USART_IRQ_COUNT + USART0_TXC_IRQ)
128#define TIMER_IRQ_COUNT 5
129#define TIMER_CAPT_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_CAPT_IRQ)
130#define TIMER_COMPA_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPA_IRQ)
131#define TIMER_COMPB_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPB_IRQ)
132#define TIMER_COMPC_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_COMPC_IRQ)
133#define TIMER_OVF_IRQ(n) (n * TIMER_IRQ_COUNT + TIMER0_OVF_IRQ)
134
135static const uint8_t irq168_328[IRQ_COUNT] = {
136 [TIMER2_COMPA_IRQ] = 8,
137 [TIMER2_COMPB_IRQ] = 9,
138 [TIMER2_OVF_IRQ] = 10,
139 [TIMER1_CAPT_IRQ] = 11,
140 [TIMER1_COMPA_IRQ] = 12,
141 [TIMER1_COMPB_IRQ] = 13,
142 [TIMER1_OVF_IRQ] = 14,
143 [TIMER0_COMPA_IRQ] = 15,
144 [TIMER0_COMPB_IRQ] = 16,
145 [TIMER0_OVF_IRQ] = 17,
146 [USART0_RXC_IRQ] = 19,
147 [USART0_DRE_IRQ] = 20,
148 [USART0_TXC_IRQ] = 21,
149}, irq1280_2560[IRQ_COUNT] = {
150 [TIMER2_COMPA_IRQ] = 14,
151 [TIMER2_COMPB_IRQ] = 15,
152 [TIMER2_OVF_IRQ] = 16,
153 [TIMER1_CAPT_IRQ] = 17,
154 [TIMER1_COMPA_IRQ] = 18,
155 [TIMER1_COMPB_IRQ] = 19,
156 [TIMER1_COMPC_IRQ] = 20,
157 [TIMER1_OVF_IRQ] = 21,
158 [TIMER0_COMPA_IRQ] = 22,
159 [TIMER0_COMPB_IRQ] = 23,
160 [TIMER0_OVF_IRQ] = 24,
161 [USART0_RXC_IRQ] = 26,
162 [USART0_DRE_IRQ] = 27,
163 [USART0_TXC_IRQ] = 28,
164 [TIMER3_CAPT_IRQ] = 32,
165 [TIMER3_COMPA_IRQ] = 33,
166 [TIMER3_COMPB_IRQ] = 34,
167 [TIMER3_COMPC_IRQ] = 35,
168 [TIMER3_OVF_IRQ] = 36,
169 [USART1_RXC_IRQ] = 37,
170 [USART1_DRE_IRQ] = 38,
171 [USART1_TXC_IRQ] = 39,
172 [TIMER4_CAPT_IRQ] = 42,
173 [TIMER4_COMPA_IRQ] = 43,
174 [TIMER4_COMPB_IRQ] = 44,
175 [TIMER4_COMPC_IRQ] = 45,
176 [TIMER4_OVF_IRQ] = 46,
177 [TIMER5_CAPT_IRQ] = 47,
178 [TIMER5_COMPA_IRQ] = 48,
179 [TIMER5_COMPB_IRQ] = 49,
180 [TIMER5_COMPC_IRQ] = 50,
181 [TIMER5_OVF_IRQ] = 51,
182 [USART2_RXC_IRQ] = 52,
183 [USART2_DRE_IRQ] = 53,
184 [USART2_TXC_IRQ] = 54,
185 [USART3_RXC_IRQ] = 55,
186 [USART3_DRE_IRQ] = 56,
187 [USART3_TXC_IRQ] = 57,
188};
189
190static void connect_peripheral_irq(const AtmegaMcuClass *k,
191 SysBusDevice *dev, int dev_irqn,
192 DeviceState *cpu,
193 unsigned peripheral_index)
194{
195 int cpu_irq = k->irq[peripheral_index];
196
197 if (!cpu_irq) {
198 return;
199 }
200
201 assert(cpu_irq >= 2);
202 cpu_irq -= 2;
203
204 sysbus_connect_irq(dev, dev_irqn, qdev_get_gpio_in(cpu, cpu_irq));
205}
206
207static void connect_power_reduction_gpio(AtmegaMcuState *s,
208 const AtmegaMcuClass *k,
209 DeviceState *cpu,
210 unsigned peripheral_index)
211{
212 unsigned power_index = k->dev[peripheral_index].power_index;
213 assert(k->dev[power_index].addr);
214 sysbus_connect_irq(SYS_BUS_DEVICE(&s->pwr[power_index - POWER0]),
215 k->dev[peripheral_index].power_bit,
216 qdev_get_gpio_in(cpu, 0));
217}
218
219static void atmega_realize(DeviceState *dev, Error **errp)
220{
221 AtmegaMcuState *s = ATMEGA_MCU(dev);
222 const AtmegaMcuClass *mc = ATMEGA_MCU_GET_CLASS(dev);
223 DeviceState *cpudev;
224 SysBusDevice *sbd;
225 char *devname;
226 size_t i;
227
228 assert(mc->io_size <= 0x200);
229
230 if (!s->xtal_freq_hz) {
231 error_setg(errp, "\"xtal-frequency-hz\" property must be provided.");
232 return;
233 }
234
235
236 object_initialize_child(OBJECT(dev), "cpu", &s->cpu, mc->cpu_type);
237 object_property_set_bool(OBJECT(&s->cpu), "realized", true, &error_abort);
238 cpudev = DEVICE(&s->cpu);
239
240
241 memory_region_init_ram(&s->sram, OBJECT(dev), "sram", mc->sram_size,
242 &error_abort);
243 memory_region_add_subregion(get_system_memory(),
244 OFFSET_DATA + mc->io_size, &s->sram);
245
246
247 memory_region_init_rom(&s->flash, OBJECT(dev),
248 "flash", mc->flash_size, &error_fatal);
249 memory_region_add_subregion(get_system_memory(), OFFSET_CODE, &s->flash);
250
251
252
253
254
255
256
257
258 s->io = qdev_new(TYPE_UNIMPLEMENTED_DEVICE);
259 qdev_prop_set_string(s->io, "name", "I/O");
260 qdev_prop_set_uint64(s->io, "size", mc->io_size);
261 sysbus_realize_and_unref(SYS_BUS_DEVICE(s->io), &error_fatal);
262 sysbus_mmio_map_overlap(SYS_BUS_DEVICE(s->io), 0, OFFSET_DATA, -1234);
263
264
265 for (i = 0; i < POWER_MAX; i++) {
266 int idx = POWER(i);
267 if (!mc->dev[idx].addr) {
268 continue;
269 }
270 devname = g_strdup_printf("power%zu", i);
271 object_initialize_child(OBJECT(dev), devname, &s->pwr[i],
272 TYPE_AVR_MASK);
273 sysbus_realize(SYS_BUS_DEVICE(&s->pwr[i]), &error_abort);
274 sysbus_mmio_map(SYS_BUS_DEVICE(&s->pwr[i]), 0,
275 OFFSET_DATA + mc->dev[idx].addr);
276 g_free(devname);
277 }
278
279
280 for (i = 0; i < GPIO_MAX; i++) {
281 int idx = GPIO(i);
282 if (!mc->dev[idx].addr) {
283 continue;
284 }
285 devname = g_strdup_printf("atmega-gpio-%c", 'a' + (char)i);
286 create_unimplemented_device(devname,
287 OFFSET_DATA + mc->dev[idx].addr, 3);
288 g_free(devname);
289 }
290
291
292 for (i = 0; i < USART_MAX; i++) {
293 int idx = USART(i);
294 if (!mc->dev[idx].addr) {
295 continue;
296 }
297 devname = g_strdup_printf("usart%zu", i);
298 object_initialize_child(OBJECT(dev), devname, &s->usart[i],
299 TYPE_AVR_USART);
300 qdev_prop_set_chr(DEVICE(&s->usart[i]), "chardev", serial_hd(i));
301 sbd = SYS_BUS_DEVICE(&s->usart[i]);
302 sysbus_realize(sbd, &error_abort);
303 sysbus_mmio_map(sbd, 0, OFFSET_DATA + mc->dev[USART(i)].addr);
304 connect_peripheral_irq(mc, sbd, 0, cpudev, USART_RXC_IRQ(i));
305 connect_peripheral_irq(mc, sbd, 1, cpudev, USART_DRE_IRQ(i));
306 connect_peripheral_irq(mc, sbd, 2, cpudev, USART_TXC_IRQ(i));
307 connect_power_reduction_gpio(s, mc, DEVICE(&s->usart[i]), idx);
308 g_free(devname);
309 }
310
311
312 for (i = 0; i < TIMER_MAX; i++) {
313 int idx = TIMER(i);
314 if (!mc->dev[idx].addr) {
315 continue;
316 }
317 if (!mc->dev[idx].is_timer16) {
318 create_unimplemented_device("avr-timer8",
319 OFFSET_DATA + mc->dev[idx].addr, 5);
320 create_unimplemented_device("avr-timer8-intmask",
321 OFFSET_DATA
322 + mc->dev[idx].intmask_addr, 1);
323 create_unimplemented_device("avr-timer8-intflag",
324 OFFSET_DATA
325 + mc->dev[idx].intflag_addr, 1);
326 continue;
327 }
328 devname = g_strdup_printf("timer%zu", i);
329 object_initialize_child(OBJECT(dev), devname, &s->timer[i],
330 TYPE_AVR_TIMER16);
331 object_property_set_uint(OBJECT(&s->timer[i]), "cpu-frequency-hz",
332 s->xtal_freq_hz, &error_abort);
333 sbd = SYS_BUS_DEVICE(&s->timer[i]);
334 sysbus_realize(sbd, &error_abort);
335 sysbus_mmio_map(sbd, 0, OFFSET_DATA + mc->dev[idx].addr);
336 sysbus_mmio_map(sbd, 1, OFFSET_DATA + mc->dev[idx].intmask_addr);
337 sysbus_mmio_map(sbd, 2, OFFSET_DATA + mc->dev[idx].intflag_addr);
338 connect_peripheral_irq(mc, sbd, 0, cpudev, TIMER_CAPT_IRQ(i));
339 connect_peripheral_irq(mc, sbd, 1, cpudev, TIMER_COMPA_IRQ(i));
340 connect_peripheral_irq(mc, sbd, 2, cpudev, TIMER_COMPB_IRQ(i));
341 connect_peripheral_irq(mc, sbd, 3, cpudev, TIMER_COMPC_IRQ(i));
342 connect_peripheral_irq(mc, sbd, 4, cpudev, TIMER_OVF_IRQ(i));
343 connect_power_reduction_gpio(s, mc, DEVICE(&s->timer[i]), idx);
344 g_free(devname);
345 }
346
347 create_unimplemented_device("avr-twi", OFFSET_DATA + 0x0b8, 6);
348 create_unimplemented_device("avr-adc", OFFSET_DATA + 0x078, 8);
349 create_unimplemented_device("avr-ext-mem-ctrl", OFFSET_DATA + 0x074, 2);
350 create_unimplemented_device("avr-watchdog", OFFSET_DATA + 0x060, 1);
351 create_unimplemented_device("avr-spi", OFFSET_DATA + 0x04c, 3);
352 create_unimplemented_device("avr-eeprom", OFFSET_DATA + 0x03f, 3);
353}
354
355static Property atmega_props[] = {
356 DEFINE_PROP_UINT64("xtal-frequency-hz", AtmegaMcuState,
357 xtal_freq_hz, 0),
358 DEFINE_PROP_END_OF_LIST()
359};
360
361static void atmega_class_init(ObjectClass *oc, void *data)
362{
363 DeviceClass *dc = DEVICE_CLASS(oc);
364
365 dc->realize = atmega_realize;
366 device_class_set_props(dc, atmega_props);
367
368 dc->user_creatable = false;
369}
370
371static void atmega168_class_init(ObjectClass *oc, void *data)
372{
373 AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
374
375 amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
376 amc->flash_size = 16 * KiB;
377 amc->eeprom_size = 512;
378 amc->sram_size = 1 * KiB;
379 amc->io_size = 256;
380 amc->gpio_count = 23;
381 amc->adc_count = 6;
382 amc->irq = irq168_328;
383 amc->dev = dev168_328;
384};
385
386static void atmega328_class_init(ObjectClass *oc, void *data)
387{
388 AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
389
390 amc->cpu_type = AVR_CPU_TYPE_NAME("avr5");
391 amc->flash_size = 32 * KiB;
392 amc->eeprom_size = 1 * KiB;
393 amc->sram_size = 2 * KiB;
394 amc->io_size = 256;
395 amc->gpio_count = 23;
396 amc->adc_count = 6;
397 amc->irq = irq168_328;
398 amc->dev = dev168_328;
399};
400
401static void atmega1280_class_init(ObjectClass *oc, void *data)
402{
403 AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
404
405 amc->cpu_type = AVR_CPU_TYPE_NAME("avr6");
406 amc->flash_size = 128 * KiB;
407 amc->eeprom_size = 4 * KiB;
408 amc->sram_size = 8 * KiB;
409 amc->io_size = 512;
410 amc->gpio_count = 86;
411 amc->adc_count = 16;
412 amc->irq = irq1280_2560;
413 amc->dev = dev1280_2560;
414};
415
416static void atmega2560_class_init(ObjectClass *oc, void *data)
417{
418 AtmegaMcuClass *amc = ATMEGA_MCU_CLASS(oc);
419
420 amc->cpu_type = AVR_CPU_TYPE_NAME("avr6");
421 amc->flash_size = 256 * KiB;
422 amc->eeprom_size = 4 * KiB;
423 amc->sram_size = 8 * KiB;
424 amc->io_size = 512;
425 amc->gpio_count = 54;
426 amc->adc_count = 16;
427 amc->irq = irq1280_2560;
428 amc->dev = dev1280_2560;
429};
430
431static const TypeInfo atmega_mcu_types[] = {
432 {
433 .name = TYPE_ATMEGA168_MCU,
434 .parent = TYPE_ATMEGA_MCU,
435 .class_init = atmega168_class_init,
436 }, {
437 .name = TYPE_ATMEGA328_MCU,
438 .parent = TYPE_ATMEGA_MCU,
439 .class_init = atmega328_class_init,
440 }, {
441 .name = TYPE_ATMEGA1280_MCU,
442 .parent = TYPE_ATMEGA_MCU,
443 .class_init = atmega1280_class_init,
444 }, {
445 .name = TYPE_ATMEGA2560_MCU,
446 .parent = TYPE_ATMEGA_MCU,
447 .class_init = atmega2560_class_init,
448 }, {
449 .name = TYPE_ATMEGA_MCU,
450 .parent = TYPE_SYS_BUS_DEVICE,
451 .instance_size = sizeof(AtmegaMcuState),
452 .class_size = sizeof(AtmegaMcuClass),
453 .class_init = atmega_class_init,
454 .abstract = true,
455 }
456};
457
458DEFINE_TYPES(atmega_mcu_types)
459
