Merge remote-tracking branch 'remotes/philmd-gitlab/tags/renesas-20201027' into staging
[qemu.git] / hw / char / exynos4210_uart.c
1 /*
2 * Exynos4210 UART Emulation
3 *
4 * Copyright (C) 2011 Samsung Electronics Co Ltd.
5 * Maksim Kozlov, <m.kozlov@samsung.com>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15 * for more details.
16 *
17 * You should have received a copy of the GNU General Public License along
18 * with this program; if not, see <http://www.gnu.org/licenses/>.
19 *
20 */
21
22 #include "qemu/osdep.h"
23 #include "hw/sysbus.h"
24 #include "migration/vmstate.h"
25 #include "qapi/error.h"
26 #include "qemu/error-report.h"
27 #include "qemu/module.h"
28 #include "qemu/timer.h"
29 #include "chardev/char-fe.h"
30 #include "chardev/char-serial.h"
31
32 #include "hw/arm/exynos4210.h"
33 #include "hw/irq.h"
34 #include "hw/qdev-properties.h"
35
36 #include "trace.h"
37 #include "qom/object.h"
38
39 /*
40 * Offsets for UART registers relative to SFR base address
41 * for UARTn
42 *
43 */
44 #define ULCON 0x0000 /* Line Control */
45 #define UCON 0x0004 /* Control */
46 #define UFCON 0x0008 /* FIFO Control */
47 #define UMCON 0x000C /* Modem Control */
48 #define UTRSTAT 0x0010 /* Tx/Rx Status */
49 #define UERSTAT 0x0014 /* UART Error Status */
50 #define UFSTAT 0x0018 /* FIFO Status */
51 #define UMSTAT 0x001C /* Modem Status */
52 #define UTXH 0x0020 /* Transmit Buffer */
53 #define URXH 0x0024 /* Receive Buffer */
54 #define UBRDIV 0x0028 /* Baud Rate Divisor */
55 #define UFRACVAL 0x002C /* Divisor Fractional Value */
56 #define UINTP 0x0030 /* Interrupt Pending */
57 #define UINTSP 0x0034 /* Interrupt Source Pending */
58 #define UINTM 0x0038 /* Interrupt Mask */
59
60 /*
61 * for indexing register in the uint32_t array
62 *
63 * 'reg' - register offset (see offsets definitions above)
64 *
65 */
66 #define I_(reg) (reg / sizeof(uint32_t))
67
68 typedef struct Exynos4210UartReg {
69 const char *name; /* the only reason is the debug output */
70 hwaddr offset;
71 uint32_t reset_value;
72 } Exynos4210UartReg;
73
74 static const Exynos4210UartReg exynos4210_uart_regs[] = {
75 {"ULCON", ULCON, 0x00000000},
76 {"UCON", UCON, 0x00003000},
77 {"UFCON", UFCON, 0x00000000},
78 {"UMCON", UMCON, 0x00000000},
79 {"UTRSTAT", UTRSTAT, 0x00000006}, /* RO */
80 {"UERSTAT", UERSTAT, 0x00000000}, /* RO */
81 {"UFSTAT", UFSTAT, 0x00000000}, /* RO */
82 {"UMSTAT", UMSTAT, 0x00000000}, /* RO */
83 {"UTXH", UTXH, 0x5c5c5c5c}, /* WO, undefined reset value*/
84 {"URXH", URXH, 0x00000000}, /* RO */
85 {"UBRDIV", UBRDIV, 0x00000000},
86 {"UFRACVAL", UFRACVAL, 0x00000000},
87 {"UINTP", UINTP, 0x00000000},
88 {"UINTSP", UINTSP, 0x00000000},
89 {"UINTM", UINTM, 0x00000000},
90 };
91
92 #define EXYNOS4210_UART_REGS_MEM_SIZE 0x3C
93
94 /* UART FIFO Control */
95 #define UFCON_FIFO_ENABLE 0x1
96 #define UFCON_Rx_FIFO_RESET 0x2
97 #define UFCON_Tx_FIFO_RESET 0x4
98 #define UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT 8
99 #define UFCON_Tx_FIFO_TRIGGER_LEVEL (7 << UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT)
100 #define UFCON_Rx_FIFO_TRIGGER_LEVEL_SHIFT 4
101 #define UFCON_Rx_FIFO_TRIGGER_LEVEL (7 << UFCON_Rx_FIFO_TRIGGER_LEVEL_SHIFT)
102
103 /* Uart FIFO Status */
104 #define UFSTAT_Rx_FIFO_COUNT 0xff
105 #define UFSTAT_Rx_FIFO_FULL 0x100
106 #define UFSTAT_Rx_FIFO_ERROR 0x200
107 #define UFSTAT_Tx_FIFO_COUNT_SHIFT 16
108 #define UFSTAT_Tx_FIFO_COUNT (0xff << UFSTAT_Tx_FIFO_COUNT_SHIFT)
109 #define UFSTAT_Tx_FIFO_FULL_SHIFT 24
110 #define UFSTAT_Tx_FIFO_FULL (1 << UFSTAT_Tx_FIFO_FULL_SHIFT)
111
112 /* UART Interrupt Source Pending */
113 #define UINTSP_RXD 0x1 /* Receive interrupt */
114 #define UINTSP_ERROR 0x2 /* Error interrupt */
115 #define UINTSP_TXD 0x4 /* Transmit interrupt */
116 #define UINTSP_MODEM 0x8 /* Modem interrupt */
117
118 /* UART Line Control */
119 #define ULCON_IR_MODE_SHIFT 6
120 #define ULCON_PARITY_SHIFT 3
121 #define ULCON_STOP_BIT_SHIFT 1
122
123 /* UART Tx/Rx Status */
124 #define UTRSTAT_Rx_TIMEOUT 0x8
125 #define UTRSTAT_TRANSMITTER_EMPTY 0x4
126 #define UTRSTAT_Tx_BUFFER_EMPTY 0x2
127 #define UTRSTAT_Rx_BUFFER_DATA_READY 0x1
128
129 /* UART Error Status */
130 #define UERSTAT_OVERRUN 0x1
131 #define UERSTAT_PARITY 0x2
132 #define UERSTAT_FRAME 0x4
133 #define UERSTAT_BREAK 0x8
134
135 typedef struct {
136 uint8_t *data;
137 uint32_t sp, rp; /* store and retrieve pointers */
138 uint32_t size;
139 } Exynos4210UartFIFO;
140
141 #define TYPE_EXYNOS4210_UART "exynos4210.uart"
142 OBJECT_DECLARE_SIMPLE_TYPE(Exynos4210UartState, EXYNOS4210_UART)
143
144 struct Exynos4210UartState {
145 SysBusDevice parent_obj;
146
147 MemoryRegion iomem;
148
149 uint32_t reg[EXYNOS4210_UART_REGS_MEM_SIZE / sizeof(uint32_t)];
150 Exynos4210UartFIFO rx;
151 Exynos4210UartFIFO tx;
152
153 QEMUTimer *fifo_timeout_timer;
154 uint64_t wordtime; /* word time in ns */
155
156 CharBackend chr;
157 qemu_irq irq;
158 qemu_irq dmairq;
159
160 uint32_t channel;
161
162 };
163
164
165 /* Used only for tracing */
166 static const char *exynos4210_uart_regname(hwaddr offset)
167 {
168
169 int i;
170
171 for (i = 0; i < ARRAY_SIZE(exynos4210_uart_regs); i++) {
172 if (offset == exynos4210_uart_regs[i].offset) {
173 return exynos4210_uart_regs[i].name;
174 }
175 }
176
177 return NULL;
178 }
179
180
181 static void fifo_store(Exynos4210UartFIFO *q, uint8_t ch)
182 {
183 q->data[q->sp] = ch;
184 q->sp = (q->sp + 1) % q->size;
185 }
186
187 static uint8_t fifo_retrieve(Exynos4210UartFIFO *q)
188 {
189 uint8_t ret = q->data[q->rp];
190 q->rp = (q->rp + 1) % q->size;
191 return ret;
192 }
193
194 static int fifo_elements_number(const Exynos4210UartFIFO *q)
195 {
196 if (q->sp < q->rp) {
197 return q->size - q->rp + q->sp;
198 }
199
200 return q->sp - q->rp;
201 }
202
203 static int fifo_empty_elements_number(const Exynos4210UartFIFO *q)
204 {
205 return q->size - fifo_elements_number(q);
206 }
207
208 static void fifo_reset(Exynos4210UartFIFO *q)
209 {
210 g_free(q->data);
211 q->data = NULL;
212
213 q->data = (uint8_t *)g_malloc0(q->size);
214
215 q->sp = 0;
216 q->rp = 0;
217 }
218
219 static uint32_t exynos4210_uart_FIFO_trigger_level(uint32_t channel,
220 uint32_t reg)
221 {
222 uint32_t level;
223
224 switch (channel) {
225 case 0:
226 level = reg * 32;
227 break;
228 case 1:
229 case 4:
230 level = reg * 8;
231 break;
232 case 2:
233 case 3:
234 level = reg * 2;
235 break;
236 default:
237 level = 0;
238 trace_exynos_uart_channel_error(channel);
239 break;
240 }
241 return level;
242 }
243
244 static uint32_t
245 exynos4210_uart_Tx_FIFO_trigger_level(const Exynos4210UartState *s)
246 {
247 uint32_t reg;
248
249 reg = (s->reg[I_(UFCON)] & UFCON_Tx_FIFO_TRIGGER_LEVEL) >>
250 UFCON_Tx_FIFO_TRIGGER_LEVEL_SHIFT;
251
252 return exynos4210_uart_FIFO_trigger_level(s->channel, reg);
253 }
254
255 static uint32_t
256 exynos4210_uart_Rx_FIFO_trigger_level(const Exynos4210UartState *s)
257 {
258 uint32_t reg;
259
260 reg = ((s->reg[I_(UFCON)] & UFCON_Rx_FIFO_TRIGGER_LEVEL) >>
261 UFCON_Rx_FIFO_TRIGGER_LEVEL_SHIFT) + 1;
262
263 return exynos4210_uart_FIFO_trigger_level(s->channel, reg);
264 }
265
266 /*
267 * Update Rx DMA busy signal if Rx DMA is enabled. For simplicity,
268 * mark DMA as busy if DMA is enabled and the receive buffer is empty.
269 */
270 static void exynos4210_uart_update_dmabusy(Exynos4210UartState *s)
271 {
272 bool rx_dma_enabled = (s->reg[I_(UCON)] & 0x03) == 0x02;
273 uint32_t count = fifo_elements_number(&s->rx);
274
275 if (rx_dma_enabled && !count) {
276 qemu_irq_raise(s->dmairq);
277 trace_exynos_uart_dmabusy(s->channel);
278 } else {
279 qemu_irq_lower(s->dmairq);
280 trace_exynos_uart_dmaready(s->channel);
281 }
282 }
283
284 static void exynos4210_uart_update_irq(Exynos4210UartState *s)
285 {
286 /*
287 * The Tx interrupt is always requested if the number of data in the
288 * transmit FIFO is smaller than the trigger level.
289 */
290 if (s->reg[I_(UFCON)] & UFCON_FIFO_ENABLE) {
291 uint32_t count = (s->reg[I_(UFSTAT)] & UFSTAT_Tx_FIFO_COUNT) >>
292 UFSTAT_Tx_FIFO_COUNT_SHIFT;
293
294 if (count <= exynos4210_uart_Tx_FIFO_trigger_level(s)) {
295 s->reg[I_(UINTSP)] |= UINTSP_TXD;
296 }
297
298 /*
299 * Rx interrupt if trigger level is reached or if rx timeout
300 * interrupt is disabled and there is data in the receive buffer
301 */
302 count = fifo_elements_number(&s->rx);
303 if ((count && !(s->reg[I_(UCON)] & 0x80)) ||
304 count >= exynos4210_uart_Rx_FIFO_trigger_level(s)) {
305 exynos4210_uart_update_dmabusy(s);
306 s->reg[I_(UINTSP)] |= UINTSP_RXD;
307 timer_del(s->fifo_timeout_timer);
308 }
309 } else if (s->reg[I_(UTRSTAT)] & UTRSTAT_Rx_BUFFER_DATA_READY) {
310 exynos4210_uart_update_dmabusy(s);
311 s->reg[I_(UINTSP)] |= UINTSP_RXD;
312 }
313
314 s->reg[I_(UINTP)] = s->reg[I_(UINTSP)] & ~s->reg[I_(UINTM)];
315
316 if (s->reg[I_(UINTP)]) {
317 qemu_irq_raise(s->irq);
318 trace_exynos_uart_irq_raised(s->channel, s->reg[I_(UINTP)]);
319 } else {
320 qemu_irq_lower(s->irq);
321 trace_exynos_uart_irq_lowered(s->channel);
322 }
323 }
324
325 static void exynos4210_uart_timeout_int(void *opaque)
326 {
327 Exynos4210UartState *s = opaque;
328
329 trace_exynos_uart_rx_timeout(s->channel, s->reg[I_(UTRSTAT)],
330 s->reg[I_(UINTSP)]);
331
332 if ((s->reg[I_(UTRSTAT)] & UTRSTAT_Rx_BUFFER_DATA_READY) ||
333 (s->reg[I_(UCON)] & (1 << 11))) {
334 s->reg[I_(UINTSP)] |= UINTSP_RXD;
335 s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_TIMEOUT;
336 exynos4210_uart_update_dmabusy(s);
337 exynos4210_uart_update_irq(s);
338 }
339 }
340
341 static void exynos4210_uart_update_parameters(Exynos4210UartState *s)
342 {
343 int speed, parity, data_bits, stop_bits;
344 QEMUSerialSetParams ssp;
345 uint64_t uclk_rate;
346
347 if (s->reg[I_(UBRDIV)] == 0) {
348 return;
349 }
350
351 if (s->reg[I_(ULCON)] & 0x20) {
352 if (s->reg[I_(ULCON)] & 0x28) {
353 parity = 'E';
354 } else {
355 parity = 'O';
356 }
357 } else {
358 parity = 'N';
359 }
360
361 if (s->reg[I_(ULCON)] & 0x4) {
362 stop_bits = 2;
363 } else {
364 stop_bits = 1;
365 }
366
367 data_bits = (s->reg[I_(ULCON)] & 0x3) + 5;
368
369 uclk_rate = 24000000;
370
371 speed = uclk_rate / ((16 * (s->reg[I_(UBRDIV)]) & 0xffff) +
372 (s->reg[I_(UFRACVAL)] & 0x7) + 16);
373
374 ssp.speed = speed;
375 ssp.parity = parity;
376 ssp.data_bits = data_bits;
377 ssp.stop_bits = stop_bits;
378
379 s->wordtime = NANOSECONDS_PER_SECOND * (data_bits + stop_bits + 1) / speed;
380
381 qemu_chr_fe_ioctl(&s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp);
382
383 trace_exynos_uart_update_params(
384 s->channel, speed, parity, data_bits, stop_bits, s->wordtime);
385 }
386
387 static void exynos4210_uart_rx_timeout_set(Exynos4210UartState *s)
388 {
389 if (s->reg[I_(UCON)] & 0x80) {
390 uint32_t timeout = ((s->reg[I_(UCON)] >> 12) & 0x0f) * s->wordtime;
391
392 timer_mod(s->fifo_timeout_timer,
393 qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + timeout);
394 } else {
395 timer_del(s->fifo_timeout_timer);
396 }
397 }
398
399 static void exynos4210_uart_write(void *opaque, hwaddr offset,
400 uint64_t val, unsigned size)
401 {
402 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
403 uint8_t ch;
404
405 trace_exynos_uart_write(s->channel, offset,
406 exynos4210_uart_regname(offset), val);
407
408 switch (offset) {
409 case ULCON:
410 case UBRDIV:
411 case UFRACVAL:
412 s->reg[I_(offset)] = val;
413 exynos4210_uart_update_parameters(s);
414 break;
415 case UFCON:
416 s->reg[I_(UFCON)] = val;
417 if (val & UFCON_Rx_FIFO_RESET) {
418 fifo_reset(&s->rx);
419 s->reg[I_(UFCON)] &= ~UFCON_Rx_FIFO_RESET;
420 trace_exynos_uart_rx_fifo_reset(s->channel);
421 }
422 if (val & UFCON_Tx_FIFO_RESET) {
423 fifo_reset(&s->tx);
424 s->reg[I_(UFCON)] &= ~UFCON_Tx_FIFO_RESET;
425 trace_exynos_uart_tx_fifo_reset(s->channel);
426 }
427 break;
428
429 case UTXH:
430 if (qemu_chr_fe_backend_connected(&s->chr)) {
431 s->reg[I_(UTRSTAT)] &= ~(UTRSTAT_TRANSMITTER_EMPTY |
432 UTRSTAT_Tx_BUFFER_EMPTY);
433 ch = (uint8_t)val;
434 /* XXX this blocks entire thread. Rewrite to use
435 * qemu_chr_fe_write and background I/O callbacks */
436 qemu_chr_fe_write_all(&s->chr, &ch, 1);
437 trace_exynos_uart_tx(s->channel, ch);
438 s->reg[I_(UTRSTAT)] |= UTRSTAT_TRANSMITTER_EMPTY |
439 UTRSTAT_Tx_BUFFER_EMPTY;
440 s->reg[I_(UINTSP)] |= UINTSP_TXD;
441 exynos4210_uart_update_irq(s);
442 }
443 break;
444
445 case UINTP:
446 s->reg[I_(UINTP)] &= ~val;
447 s->reg[I_(UINTSP)] &= ~val;
448 trace_exynos_uart_intclr(s->channel, s->reg[I_(UINTP)]);
449 exynos4210_uart_update_irq(s);
450 break;
451 case UTRSTAT:
452 if (val & UTRSTAT_Rx_TIMEOUT) {
453 s->reg[I_(UTRSTAT)] &= ~UTRSTAT_Rx_TIMEOUT;
454 }
455 break;
456 case UERSTAT:
457 case UFSTAT:
458 case UMSTAT:
459 case URXH:
460 trace_exynos_uart_ro_write(
461 s->channel, exynos4210_uart_regname(offset), offset);
462 break;
463 case UINTSP:
464 s->reg[I_(UINTSP)] &= ~val;
465 break;
466 case UINTM:
467 s->reg[I_(UINTM)] = val;
468 exynos4210_uart_update_irq(s);
469 break;
470 case UCON:
471 case UMCON:
472 default:
473 s->reg[I_(offset)] = val;
474 break;
475 }
476 }
477
478 static uint64_t exynos4210_uart_read(void *opaque, hwaddr offset,
479 unsigned size)
480 {
481 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
482 uint32_t res;
483
484 switch (offset) {
485 case UERSTAT: /* Read Only */
486 res = s->reg[I_(UERSTAT)];
487 s->reg[I_(UERSTAT)] = 0;
488 trace_exynos_uart_read(s->channel, offset,
489 exynos4210_uart_regname(offset), res);
490 return res;
491 case UFSTAT: /* Read Only */
492 s->reg[I_(UFSTAT)] = fifo_elements_number(&s->rx) & 0xff;
493 if (fifo_empty_elements_number(&s->rx) == 0) {
494 s->reg[I_(UFSTAT)] |= UFSTAT_Rx_FIFO_FULL;
495 s->reg[I_(UFSTAT)] &= ~0xff;
496 }
497 trace_exynos_uart_read(s->channel, offset,
498 exynos4210_uart_regname(offset),
499 s->reg[I_(UFSTAT)]);
500 return s->reg[I_(UFSTAT)];
501 case URXH:
502 if (s->reg[I_(UFCON)] & UFCON_FIFO_ENABLE) {
503 if (fifo_elements_number(&s->rx)) {
504 res = fifo_retrieve(&s->rx);
505 trace_exynos_uart_rx(s->channel, res);
506 if (!fifo_elements_number(&s->rx)) {
507 s->reg[I_(UTRSTAT)] &= ~UTRSTAT_Rx_BUFFER_DATA_READY;
508 } else {
509 s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
510 }
511 } else {
512 trace_exynos_uart_rx_error(s->channel);
513 s->reg[I_(UINTSP)] |= UINTSP_ERROR;
514 exynos4210_uart_update_irq(s);
515 res = 0;
516 }
517 } else {
518 s->reg[I_(UTRSTAT)] &= ~UTRSTAT_Rx_BUFFER_DATA_READY;
519 res = s->reg[I_(URXH)];
520 }
521 exynos4210_uart_update_dmabusy(s);
522 trace_exynos_uart_read(s->channel, offset,
523 exynos4210_uart_regname(offset), res);
524 return res;
525 case UTXH:
526 trace_exynos_uart_wo_read(s->channel, exynos4210_uart_regname(offset),
527 offset);
528 break;
529 default:
530 trace_exynos_uart_read(s->channel, offset,
531 exynos4210_uart_regname(offset),
532 s->reg[I_(offset)]);
533 return s->reg[I_(offset)];
534 }
535
536 trace_exynos_uart_read(s->channel, offset, exynos4210_uart_regname(offset),
537 0);
538 return 0;
539 }
540
541 static const MemoryRegionOps exynos4210_uart_ops = {
542 .read = exynos4210_uart_read,
543 .write = exynos4210_uart_write,
544 .endianness = DEVICE_NATIVE_ENDIAN,
545 .valid = {
546 .max_access_size = 4,
547 .unaligned = false
548 },
549 };
550
551 static int exynos4210_uart_can_receive(void *opaque)
552 {
553 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
554
555 return fifo_empty_elements_number(&s->rx);
556 }
557
558 static void exynos4210_uart_receive(void *opaque, const uint8_t *buf, int size)
559 {
560 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
561 int i;
562
563 if (s->reg[I_(UFCON)] & UFCON_FIFO_ENABLE) {
564 if (fifo_empty_elements_number(&s->rx) < size) {
565 size = fifo_empty_elements_number(&s->rx);
566 s->reg[I_(UINTSP)] |= UINTSP_ERROR;
567 }
568 for (i = 0; i < size; i++) {
569 fifo_store(&s->rx, buf[i]);
570 }
571 exynos4210_uart_rx_timeout_set(s);
572 } else {
573 s->reg[I_(URXH)] = buf[0];
574 }
575 s->reg[I_(UTRSTAT)] |= UTRSTAT_Rx_BUFFER_DATA_READY;
576
577 exynos4210_uart_update_irq(s);
578 }
579
580
581 static void exynos4210_uart_event(void *opaque, QEMUChrEvent event)
582 {
583 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
584
585 if (event == CHR_EVENT_BREAK) {
586 /* When the RxDn is held in logic 0, then a null byte is pushed into the
587 * fifo */
588 fifo_store(&s->rx, '\0');
589 s->reg[I_(UERSTAT)] |= UERSTAT_BREAK;
590 exynos4210_uart_update_irq(s);
591 }
592 }
593
594
595 static void exynos4210_uart_reset(DeviceState *dev)
596 {
597 Exynos4210UartState *s = EXYNOS4210_UART(dev);
598 int i;
599
600 for (i = 0; i < ARRAY_SIZE(exynos4210_uart_regs); i++) {
601 s->reg[I_(exynos4210_uart_regs[i].offset)] =
602 exynos4210_uart_regs[i].reset_value;
603 }
604
605 fifo_reset(&s->rx);
606 fifo_reset(&s->tx);
607
608 trace_exynos_uart_rxsize(s->channel, s->rx.size);
609 }
610
611 static int exynos4210_uart_post_load(void *opaque, int version_id)
612 {
613 Exynos4210UartState *s = (Exynos4210UartState *)opaque;
614
615 exynos4210_uart_update_parameters(s);
616 exynos4210_uart_rx_timeout_set(s);
617
618 return 0;
619 }
620
621 static const VMStateDescription vmstate_exynos4210_uart_fifo = {
622 .name = "exynos4210.uart.fifo",
623 .version_id = 1,
624 .minimum_version_id = 1,
625 .post_load = exynos4210_uart_post_load,
626 .fields = (VMStateField[]) {
627 VMSTATE_UINT32(sp, Exynos4210UartFIFO),
628 VMSTATE_UINT32(rp, Exynos4210UartFIFO),
629 VMSTATE_VBUFFER_UINT32(data, Exynos4210UartFIFO, 1, NULL, size),
630 VMSTATE_END_OF_LIST()
631 }
632 };
633
634 static const VMStateDescription vmstate_exynos4210_uart = {
635 .name = "exynos4210.uart",
636 .version_id = 1,
637 .minimum_version_id = 1,
638 .fields = (VMStateField[]) {
639 VMSTATE_STRUCT(rx, Exynos4210UartState, 1,
640 vmstate_exynos4210_uart_fifo, Exynos4210UartFIFO),
641 VMSTATE_UINT32_ARRAY(reg, Exynos4210UartState,
642 EXYNOS4210_UART_REGS_MEM_SIZE / sizeof(uint32_t)),
643 VMSTATE_END_OF_LIST()
644 }
645 };
646
647 DeviceState *exynos4210_uart_create(hwaddr addr,
648 int fifo_size,
649 int channel,
650 Chardev *chr,
651 qemu_irq irq)
652 {
653 DeviceState *dev;
654 SysBusDevice *bus;
655
656 dev = qdev_new(TYPE_EXYNOS4210_UART);
657
658 qdev_prop_set_chr(dev, "chardev", chr);
659 qdev_prop_set_uint32(dev, "channel", channel);
660 qdev_prop_set_uint32(dev, "rx-size", fifo_size);
661 qdev_prop_set_uint32(dev, "tx-size", fifo_size);
662
663 bus = SYS_BUS_DEVICE(dev);
664 sysbus_realize_and_unref(bus, &error_fatal);
665 if (addr != (hwaddr)-1) {
666 sysbus_mmio_map(bus, 0, addr);
667 }
668 sysbus_connect_irq(bus, 0, irq);
669
670 return dev;
671 }
672
673 static void exynos4210_uart_init(Object *obj)
674 {
675 SysBusDevice *dev = SYS_BUS_DEVICE(obj);
676 Exynos4210UartState *s = EXYNOS4210_UART(dev);
677
678 s->wordtime = NANOSECONDS_PER_SECOND * 10 / 9600;
679
680 /* memory mapping */
681 memory_region_init_io(&s->iomem, obj, &exynos4210_uart_ops, s,
682 "exynos4210.uart", EXYNOS4210_UART_REGS_MEM_SIZE);
683 sysbus_init_mmio(dev, &s->iomem);
684
685 sysbus_init_irq(dev, &s->irq);
686 sysbus_init_irq(dev, &s->dmairq);
687 }
688
689 static void exynos4210_uart_realize(DeviceState *dev, Error **errp)
690 {
691 Exynos4210UartState *s = EXYNOS4210_UART(dev);
692
693 s->fifo_timeout_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
694 exynos4210_uart_timeout_int, s);
695
696 qemu_chr_fe_set_handlers(&s->chr, exynos4210_uart_can_receive,
697 exynos4210_uart_receive, exynos4210_uart_event,
698 NULL, s, NULL, true);
699 }
700
701 static Property exynos4210_uart_properties[] = {
702 DEFINE_PROP_CHR("chardev", Exynos4210UartState, chr),
703 DEFINE_PROP_UINT32("channel", Exynos4210UartState, channel, 0),
704 DEFINE_PROP_UINT32("rx-size", Exynos4210UartState, rx.size, 16),
705 DEFINE_PROP_UINT32("tx-size", Exynos4210UartState, tx.size, 16),
706 DEFINE_PROP_END_OF_LIST(),
707 };
708
709 static void exynos4210_uart_class_init(ObjectClass *klass, void *data)
710 {
711 DeviceClass *dc = DEVICE_CLASS(klass);
712
713 dc->realize = exynos4210_uart_realize;
714 dc->reset = exynos4210_uart_reset;
715 device_class_set_props(dc, exynos4210_uart_properties);
716 dc->vmsd = &vmstate_exynos4210_uart;
717 }
718
719 static const TypeInfo exynos4210_uart_info = {
720 .name = TYPE_EXYNOS4210_UART,
721 .parent = TYPE_SYS_BUS_DEVICE,
722 .instance_size = sizeof(Exynos4210UartState),
723 .instance_init = exynos4210_uart_init,
724 .class_init = exynos4210_uart_class_init,
725 };
726
727 static void exynos4210_uart_register(void)
728 {
729 type_register_static(&exynos4210_uart_info);
730 }
731
732 type_init(exynos4210_uart_register)