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35548b06 PC |
1 | /* |
2 | * Device model for Cadence UART | |
3 | * | |
4 | * Copyright (c) 2010 Xilinx Inc. | |
5 | * Copyright (c) 2012 Peter A.G. Crosthwaite (peter.crosthwaite@petalogix.com) | |
6 | * Copyright (c) 2012 PetaLogix Pty Ltd. | |
7 | * Written by Haibing Ma | |
8 | * M.Habib | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * as published by the Free Software Foundation; either version | |
13 | * 2 of the License, or (at your option) any later version. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, see <http://www.gnu.org/licenses/>. | |
17 | */ | |
18 | ||
8ef94f0b | 19 | #include "qemu/osdep.h" |
8ae57b2f | 20 | #include "hw/char/cadence_uart.h" |
35548b06 PC |
21 | |
22 | #ifdef CADENCE_UART_ERR_DEBUG | |
23 | #define DB_PRINT(...) do { \ | |
24 | fprintf(stderr, ": %s: ", __func__); \ | |
25 | fprintf(stderr, ## __VA_ARGS__); \ | |
26 | } while (0); | |
27 | #else | |
28 | #define DB_PRINT(...) | |
29 | #endif | |
30 | ||
31 | #define UART_SR_INTR_RTRIG 0x00000001 | |
32 | #define UART_SR_INTR_REMPTY 0x00000002 | |
33 | #define UART_SR_INTR_RFUL 0x00000004 | |
34 | #define UART_SR_INTR_TEMPTY 0x00000008 | |
35 | #define UART_SR_INTR_TFUL 0x00000010 | |
11a239a5 PC |
36 | /* somewhat awkwardly, TTRIG is misaligned between SR and ISR */ |
37 | #define UART_SR_TTRIG 0x00002000 | |
38 | #define UART_INTR_TTRIG 0x00000400 | |
35548b06 PC |
39 | /* bits fields in CSR that correlate to CISR. If any of these bits are set in |
40 | * SR, then the same bit in CISR is set high too */ | |
41 | #define UART_SR_TO_CISR_MASK 0x0000001F | |
42 | ||
43 | #define UART_INTR_ROVR 0x00000020 | |
44 | #define UART_INTR_FRAME 0x00000040 | |
45 | #define UART_INTR_PARE 0x00000080 | |
46 | #define UART_INTR_TIMEOUT 0x00000100 | |
47 | #define UART_INTR_DMSI 0x00000200 | |
11a239a5 | 48 | #define UART_INTR_TOVR 0x00001000 |
35548b06 PC |
49 | |
50 | #define UART_SR_RACTIVE 0x00000400 | |
51 | #define UART_SR_TACTIVE 0x00000800 | |
52 | #define UART_SR_FDELT 0x00001000 | |
53 | ||
54 | #define UART_CR_RXRST 0x00000001 | |
55 | #define UART_CR_TXRST 0x00000002 | |
56 | #define UART_CR_RX_EN 0x00000004 | |
57 | #define UART_CR_RX_DIS 0x00000008 | |
58 | #define UART_CR_TX_EN 0x00000010 | |
59 | #define UART_CR_TX_DIS 0x00000020 | |
60 | #define UART_CR_RST_TO 0x00000040 | |
61 | #define UART_CR_STARTBRK 0x00000080 | |
62 | #define UART_CR_STOPBRK 0x00000100 | |
63 | ||
64 | #define UART_MR_CLKS 0x00000001 | |
65 | #define UART_MR_CHRL 0x00000006 | |
66 | #define UART_MR_CHRL_SH 1 | |
67 | #define UART_MR_PAR 0x00000038 | |
68 | #define UART_MR_PAR_SH 3 | |
69 | #define UART_MR_NBSTOP 0x000000C0 | |
70 | #define UART_MR_NBSTOP_SH 6 | |
71 | #define UART_MR_CHMODE 0x00000300 | |
72 | #define UART_MR_CHMODE_SH 8 | |
73 | #define UART_MR_UCLKEN 0x00000400 | |
74 | #define UART_MR_IRMODE 0x00000800 | |
75 | ||
76 | #define UART_DATA_BITS_6 (0x3 << UART_MR_CHRL_SH) | |
77 | #define UART_DATA_BITS_7 (0x2 << UART_MR_CHRL_SH) | |
78 | #define UART_PARITY_ODD (0x1 << UART_MR_PAR_SH) | |
79 | #define UART_PARITY_EVEN (0x0 << UART_MR_PAR_SH) | |
80 | #define UART_STOP_BITS_1 (0x3 << UART_MR_NBSTOP_SH) | |
81 | #define UART_STOP_BITS_2 (0x2 << UART_MR_NBSTOP_SH) | |
82 | #define NORMAL_MODE (0x0 << UART_MR_CHMODE_SH) | |
83 | #define ECHO_MODE (0x1 << UART_MR_CHMODE_SH) | |
84 | #define LOCAL_LOOPBACK (0x2 << UART_MR_CHMODE_SH) | |
85 | #define REMOTE_LOOPBACK (0x3 << UART_MR_CHMODE_SH) | |
86 | ||
35548b06 PC |
87 | #define UART_INPUT_CLK 50000000 |
88 | ||
89 | #define R_CR (0x00/4) | |
90 | #define R_MR (0x04/4) | |
91 | #define R_IER (0x08/4) | |
92 | #define R_IDR (0x0C/4) | |
93 | #define R_IMR (0x10/4) | |
94 | #define R_CISR (0x14/4) | |
95 | #define R_BRGR (0x18/4) | |
96 | #define R_RTOR (0x1C/4) | |
97 | #define R_RTRIG (0x20/4) | |
98 | #define R_MCR (0x24/4) | |
99 | #define R_MSR (0x28/4) | |
100 | #define R_SR (0x2C/4) | |
101 | #define R_TX_RX (0x30/4) | |
102 | #define R_BDIV (0x34/4) | |
103 | #define R_FDEL (0x38/4) | |
104 | #define R_PMIN (0x3C/4) | |
105 | #define R_PWID (0x40/4) | |
106 | #define R_TTRIG (0x44/4) | |
107 | ||
35548b06 | 108 | |
e86da3cb | 109 | static void uart_update_status(CadenceUARTState *s) |
35548b06 | 110 | { |
676f4c09 PC |
111 | s->r[R_SR] = 0; |
112 | ||
e86da3cb PC |
113 | s->r[R_SR] |= s->rx_count == CADENCE_UART_RX_FIFO_SIZE ? UART_SR_INTR_RFUL |
114 | : 0; | |
676f4c09 PC |
115 | s->r[R_SR] |= !s->rx_count ? UART_SR_INTR_REMPTY : 0; |
116 | s->r[R_SR] |= s->rx_count >= s->r[R_RTRIG] ? UART_SR_INTR_RTRIG : 0; | |
117 | ||
e86da3cb PC |
118 | s->r[R_SR] |= s->tx_count == CADENCE_UART_TX_FIFO_SIZE ? UART_SR_INTR_TFUL |
119 | : 0; | |
2152e08a PC |
120 | s->r[R_SR] |= !s->tx_count ? UART_SR_INTR_TEMPTY : 0; |
121 | s->r[R_SR] |= s->tx_count >= s->r[R_TTRIG] ? UART_SR_TTRIG : 0; | |
122 | ||
35548b06 | 123 | s->r[R_CISR] |= s->r[R_SR] & UART_SR_TO_CISR_MASK; |
2152e08a | 124 | s->r[R_CISR] |= s->r[R_SR] & UART_SR_TTRIG ? UART_INTR_TTRIG : 0; |
35548b06 PC |
125 | qemu_set_irq(s->irq, !!(s->r[R_IMR] & s->r[R_CISR])); |
126 | } | |
127 | ||
128 | static void fifo_trigger_update(void *opaque) | |
129 | { | |
e86da3cb | 130 | CadenceUARTState *s = opaque; |
35548b06 PC |
131 | |
132 | s->r[R_CISR] |= UART_INTR_TIMEOUT; | |
133 | ||
134 | uart_update_status(s); | |
135 | } | |
136 | ||
e86da3cb | 137 | static void uart_rx_reset(CadenceUARTState *s) |
35548b06 PC |
138 | { |
139 | s->rx_wpos = 0; | |
140 | s->rx_count = 0; | |
9121d02c PC |
141 | if (s->chr) { |
142 | qemu_chr_accept_input(s->chr); | |
143 | } | |
35548b06 PC |
144 | } |
145 | ||
e86da3cb | 146 | static void uart_tx_reset(CadenceUARTState *s) |
35548b06 | 147 | { |
2152e08a | 148 | s->tx_count = 0; |
35548b06 PC |
149 | } |
150 | ||
e86da3cb | 151 | static void uart_send_breaks(CadenceUARTState *s) |
35548b06 PC |
152 | { |
153 | int break_enabled = 1; | |
154 | ||
af52fe86 FK |
155 | if (s->chr) { |
156 | qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_BREAK, | |
157 | &break_enabled); | |
158 | } | |
35548b06 PC |
159 | } |
160 | ||
e86da3cb | 161 | static void uart_parameters_setup(CadenceUARTState *s) |
35548b06 PC |
162 | { |
163 | QEMUSerialSetParams ssp; | |
164 | unsigned int baud_rate, packet_size; | |
165 | ||
166 | baud_rate = (s->r[R_MR] & UART_MR_CLKS) ? | |
167 | UART_INPUT_CLK / 8 : UART_INPUT_CLK; | |
168 | ||
169 | ssp.speed = baud_rate / (s->r[R_BRGR] * (s->r[R_BDIV] + 1)); | |
170 | packet_size = 1; | |
171 | ||
172 | switch (s->r[R_MR] & UART_MR_PAR) { | |
173 | case UART_PARITY_EVEN: | |
174 | ssp.parity = 'E'; | |
175 | packet_size++; | |
176 | break; | |
177 | case UART_PARITY_ODD: | |
178 | ssp.parity = 'O'; | |
179 | packet_size++; | |
180 | break; | |
181 | default: | |
182 | ssp.parity = 'N'; | |
183 | break; | |
184 | } | |
185 | ||
186 | switch (s->r[R_MR] & UART_MR_CHRL) { | |
187 | case UART_DATA_BITS_6: | |
188 | ssp.data_bits = 6; | |
189 | break; | |
190 | case UART_DATA_BITS_7: | |
191 | ssp.data_bits = 7; | |
192 | break; | |
193 | default: | |
194 | ssp.data_bits = 8; | |
195 | break; | |
196 | } | |
197 | ||
198 | switch (s->r[R_MR] & UART_MR_NBSTOP) { | |
199 | case UART_STOP_BITS_1: | |
200 | ssp.stop_bits = 1; | |
201 | break; | |
202 | default: | |
203 | ssp.stop_bits = 2; | |
204 | break; | |
205 | } | |
206 | ||
207 | packet_size += ssp.data_bits + ssp.stop_bits; | |
73bcb24d | 208 | s->char_tx_time = (NANOSECONDS_PER_SECOND / ssp.speed) * packet_size; |
af52fe86 FK |
209 | if (s->chr) { |
210 | qemu_chr_fe_ioctl(s->chr, CHR_IOCTL_SERIAL_SET_PARAMS, &ssp); | |
211 | } | |
35548b06 PC |
212 | } |
213 | ||
214 | static int uart_can_receive(void *opaque) | |
215 | { | |
e86da3cb PC |
216 | CadenceUARTState *s = opaque; |
217 | int ret = MAX(CADENCE_UART_RX_FIFO_SIZE, CADENCE_UART_TX_FIFO_SIZE); | |
d0ac820f | 218 | uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE; |
35548b06 | 219 | |
d0ac820f | 220 | if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) { |
e86da3cb | 221 | ret = MIN(ret, CADENCE_UART_RX_FIFO_SIZE - s->rx_count); |
d0ac820f PC |
222 | } |
223 | if (ch_mode == REMOTE_LOOPBACK || ch_mode == ECHO_MODE) { | |
e86da3cb | 224 | ret = MIN(ret, CADENCE_UART_TX_FIFO_SIZE - s->tx_count); |
d0ac820f PC |
225 | } |
226 | return ret; | |
35548b06 PC |
227 | } |
228 | ||
e86da3cb | 229 | static void uart_ctrl_update(CadenceUARTState *s) |
35548b06 PC |
230 | { |
231 | if (s->r[R_CR] & UART_CR_TXRST) { | |
232 | uart_tx_reset(s); | |
233 | } | |
234 | ||
235 | if (s->r[R_CR] & UART_CR_RXRST) { | |
236 | uart_rx_reset(s); | |
237 | } | |
238 | ||
239 | s->r[R_CR] &= ~(UART_CR_TXRST | UART_CR_RXRST); | |
240 | ||
35548b06 PC |
241 | if (s->r[R_CR] & UART_CR_STARTBRK && !(s->r[R_CR] & UART_CR_STOPBRK)) { |
242 | uart_send_breaks(s); | |
243 | } | |
244 | } | |
245 | ||
246 | static void uart_write_rx_fifo(void *opaque, const uint8_t *buf, int size) | |
247 | { | |
e86da3cb | 248 | CadenceUARTState *s = opaque; |
bc72ad67 | 249 | uint64_t new_rx_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL); |
35548b06 PC |
250 | int i; |
251 | ||
252 | if ((s->r[R_CR] & UART_CR_RX_DIS) || !(s->r[R_CR] & UART_CR_RX_EN)) { | |
253 | return; | |
254 | } | |
255 | ||
e86da3cb | 256 | if (s->rx_count == CADENCE_UART_RX_FIFO_SIZE) { |
35548b06 PC |
257 | s->r[R_CISR] |= UART_INTR_ROVR; |
258 | } else { | |
259 | for (i = 0; i < size; i++) { | |
1e77c91e | 260 | s->rx_fifo[s->rx_wpos] = buf[i]; |
e86da3cb | 261 | s->rx_wpos = (s->rx_wpos + 1) % CADENCE_UART_RX_FIFO_SIZE; |
35548b06 | 262 | s->rx_count++; |
35548b06 | 263 | } |
bc72ad67 | 264 | timer_mod(s->fifo_trigger_handle, new_rx_time + |
35548b06 PC |
265 | (s->char_tx_time * 4)); |
266 | } | |
267 | uart_update_status(s); | |
268 | } | |
269 | ||
38acd64b PC |
270 | static gboolean cadence_uart_xmit(GIOChannel *chan, GIOCondition cond, |
271 | void *opaque) | |
272 | { | |
e86da3cb | 273 | CadenceUARTState *s = opaque; |
38acd64b PC |
274 | int ret; |
275 | ||
276 | /* instant drain the fifo when there's no back-end */ | |
277 | if (!s->chr) { | |
278 | s->tx_count = 0; | |
af52fe86 | 279 | return FALSE; |
38acd64b PC |
280 | } |
281 | ||
282 | if (!s->tx_count) { | |
283 | return FALSE; | |
284 | } | |
285 | ||
286 | ret = qemu_chr_fe_write(s->chr, s->tx_fifo, s->tx_count); | |
287 | s->tx_count -= ret; | |
288 | memmove(s->tx_fifo, s->tx_fifo + ret, s->tx_count); | |
289 | ||
290 | if (s->tx_count) { | |
e02bc6de RPM |
291 | int r = qemu_chr_fe_add_watch(s->chr, G_IO_OUT|G_IO_HUP, |
292 | cadence_uart_xmit, s); | |
38acd64b PC |
293 | assert(r); |
294 | } | |
295 | ||
296 | uart_update_status(s); | |
297 | return FALSE; | |
298 | } | |
299 | ||
e86da3cb PC |
300 | static void uart_write_tx_fifo(CadenceUARTState *s, const uint8_t *buf, |
301 | int size) | |
35548b06 PC |
302 | { |
303 | if ((s->r[R_CR] & UART_CR_TX_DIS) || !(s->r[R_CR] & UART_CR_TX_EN)) { | |
304 | return; | |
305 | } | |
306 | ||
e86da3cb PC |
307 | if (size > CADENCE_UART_TX_FIFO_SIZE - s->tx_count) { |
308 | size = CADENCE_UART_TX_FIFO_SIZE - s->tx_count; | |
86baecc3 PC |
309 | /* |
310 | * This can only be a guest error via a bad tx fifo register push, | |
311 | * as can_receive() should stop remote loop and echo modes ever getting | |
312 | * us to here. | |
313 | */ | |
314 | qemu_log_mask(LOG_GUEST_ERROR, "cadence_uart: TxFIFO overflow"); | |
315 | s->r[R_CISR] |= UART_INTR_ROVR; | |
316 | } | |
317 | ||
318 | memcpy(s->tx_fifo + s->tx_count, buf, size); | |
319 | s->tx_count += size; | |
320 | ||
38acd64b | 321 | cadence_uart_xmit(NULL, G_IO_OUT, s); |
35548b06 PC |
322 | } |
323 | ||
324 | static void uart_receive(void *opaque, const uint8_t *buf, int size) | |
325 | { | |
e86da3cb | 326 | CadenceUARTState *s = opaque; |
35548b06 PC |
327 | uint32_t ch_mode = s->r[R_MR] & UART_MR_CHMODE; |
328 | ||
329 | if (ch_mode == NORMAL_MODE || ch_mode == ECHO_MODE) { | |
330 | uart_write_rx_fifo(opaque, buf, size); | |
331 | } | |
332 | if (ch_mode == REMOTE_LOOPBACK || ch_mode == ECHO_MODE) { | |
333 | uart_write_tx_fifo(s, buf, size); | |
334 | } | |
335 | } | |
336 | ||
337 | static void uart_event(void *opaque, int event) | |
338 | { | |
e86da3cb | 339 | CadenceUARTState *s = opaque; |
35548b06 PC |
340 | uint8_t buf = '\0'; |
341 | ||
342 | if (event == CHR_EVENT_BREAK) { | |
343 | uart_write_rx_fifo(opaque, &buf, 1); | |
344 | } | |
345 | ||
346 | uart_update_status(s); | |
347 | } | |
348 | ||
e86da3cb | 349 | static void uart_read_rx_fifo(CadenceUARTState *s, uint32_t *c) |
35548b06 PC |
350 | { |
351 | if ((s->r[R_CR] & UART_CR_RX_DIS) || !(s->r[R_CR] & UART_CR_RX_EN)) { | |
352 | return; | |
353 | } | |
354 | ||
35548b06 | 355 | if (s->rx_count) { |
e86da3cb PC |
356 | uint32_t rx_rpos = (CADENCE_UART_RX_FIFO_SIZE + s->rx_wpos - |
357 | s->rx_count) % CADENCE_UART_RX_FIFO_SIZE; | |
1e77c91e | 358 | *c = s->rx_fifo[rx_rpos]; |
35548b06 PC |
359 | s->rx_count--; |
360 | ||
af52fe86 FK |
361 | if (s->chr) { |
362 | qemu_chr_accept_input(s->chr); | |
363 | } | |
35548b06 PC |
364 | } else { |
365 | *c = 0; | |
35548b06 PC |
366 | } |
367 | ||
35548b06 PC |
368 | uart_update_status(s); |
369 | } | |
370 | ||
a8170e5e | 371 | static void uart_write(void *opaque, hwaddr offset, |
35548b06 PC |
372 | uint64_t value, unsigned size) |
373 | { | |
e86da3cb | 374 | CadenceUARTState *s = opaque; |
35548b06 | 375 | |
2ddef11b | 376 | DB_PRINT(" offset:%x data:%08x\n", (unsigned)offset, (unsigned)value); |
35548b06 | 377 | offset >>= 2; |
5eb0b194 MT |
378 | if (offset >= CADENCE_UART_R_MAX) { |
379 | return; | |
380 | } | |
35548b06 PC |
381 | switch (offset) { |
382 | case R_IER: /* ier (wts imr) */ | |
383 | s->r[R_IMR] |= value; | |
384 | break; | |
385 | case R_IDR: /* idr (wtc imr) */ | |
386 | s->r[R_IMR] &= ~value; | |
387 | break; | |
388 | case R_IMR: /* imr (read only) */ | |
389 | break; | |
390 | case R_CISR: /* cisr (wtc) */ | |
391 | s->r[R_CISR] &= ~value; | |
392 | break; | |
393 | case R_TX_RX: /* UARTDR */ | |
394 | switch (s->r[R_MR] & UART_MR_CHMODE) { | |
395 | case NORMAL_MODE: | |
396 | uart_write_tx_fifo(s, (uint8_t *) &value, 1); | |
397 | break; | |
398 | case LOCAL_LOOPBACK: | |
399 | uart_write_rx_fifo(opaque, (uint8_t *) &value, 1); | |
400 | break; | |
401 | } | |
402 | break; | |
403 | default: | |
404 | s->r[offset] = value; | |
405 | } | |
406 | ||
407 | switch (offset) { | |
408 | case R_CR: | |
409 | uart_ctrl_update(s); | |
410 | break; | |
411 | case R_MR: | |
412 | uart_parameters_setup(s); | |
413 | break; | |
414 | } | |
589bfb68 | 415 | uart_update_status(s); |
35548b06 PC |
416 | } |
417 | ||
a8170e5e | 418 | static uint64_t uart_read(void *opaque, hwaddr offset, |
35548b06 PC |
419 | unsigned size) |
420 | { | |
e86da3cb | 421 | CadenceUARTState *s = opaque; |
35548b06 PC |
422 | uint32_t c = 0; |
423 | ||
424 | offset >>= 2; | |
e86da3cb | 425 | if (offset >= CADENCE_UART_R_MAX) { |
2ddef11b | 426 | c = 0; |
35548b06 PC |
427 | } else if (offset == R_TX_RX) { |
428 | uart_read_rx_fifo(s, &c); | |
2ddef11b PC |
429 | } else { |
430 | c = s->r[offset]; | |
35548b06 | 431 | } |
2ddef11b PC |
432 | |
433 | DB_PRINT(" offset:%x data:%08x\n", (unsigned)(offset << 2), (unsigned)c); | |
434 | return c; | |
35548b06 PC |
435 | } |
436 | ||
437 | static const MemoryRegionOps uart_ops = { | |
438 | .read = uart_read, | |
439 | .write = uart_write, | |
440 | .endianness = DEVICE_NATIVE_ENDIAN, | |
441 | }; | |
442 | ||
823dd487 | 443 | static void cadence_uart_reset(DeviceState *dev) |
35548b06 | 444 | { |
e86da3cb | 445 | CadenceUARTState *s = CADENCE_UART(dev); |
823dd487 | 446 | |
35548b06 PC |
447 | s->r[R_CR] = 0x00000128; |
448 | s->r[R_IMR] = 0; | |
449 | s->r[R_CISR] = 0; | |
450 | s->r[R_RTRIG] = 0x00000020; | |
451 | s->r[R_BRGR] = 0x0000000F; | |
452 | s->r[R_TTRIG] = 0x00000020; | |
453 | ||
454 | uart_rx_reset(s); | |
455 | uart_tx_reset(s); | |
456 | ||
676f4c09 | 457 | uart_update_status(s); |
35548b06 PC |
458 | } |
459 | ||
96f20926 | 460 | static void cadence_uart_realize(DeviceState *dev, Error **errp) |
35548b06 | 461 | { |
e86da3cb | 462 | CadenceUARTState *s = CADENCE_UART(dev); |
35548b06 | 463 | |
bc72ad67 | 464 | s->fifo_trigger_handle = timer_new_ns(QEMU_CLOCK_VIRTUAL, |
96f20926 | 465 | fifo_trigger_update, s); |
35548b06 | 466 | |
d71b22bb | 467 | /* FIXME use a qdev chardev prop instead of qemu_char_get_next_serial() */ |
35548b06 PC |
468 | s->chr = qemu_char_get_next_serial(); |
469 | ||
35548b06 PC |
470 | if (s->chr) { |
471 | qemu_chr_add_handlers(s->chr, uart_can_receive, uart_receive, | |
472 | uart_event, s); | |
473 | } | |
96f20926 | 474 | } |
35548b06 | 475 | |
96f20926 AF |
476 | static void cadence_uart_init(Object *obj) |
477 | { | |
478 | SysBusDevice *sbd = SYS_BUS_DEVICE(obj); | |
e86da3cb | 479 | CadenceUARTState *s = CADENCE_UART(obj); |
96f20926 AF |
480 | |
481 | memory_region_init_io(&s->iomem, obj, &uart_ops, s, "uart", 0x1000); | |
482 | sysbus_init_mmio(sbd, &s->iomem); | |
483 | sysbus_init_irq(sbd, &s->irq); | |
484 | ||
73bcb24d | 485 | s->char_tx_time = (NANOSECONDS_PER_SECOND / 9600) * 10; |
35548b06 PC |
486 | } |
487 | ||
488 | static int cadence_uart_post_load(void *opaque, int version_id) | |
489 | { | |
e86da3cb | 490 | CadenceUARTState *s = opaque; |
35548b06 PC |
491 | |
492 | uart_parameters_setup(s); | |
493 | uart_update_status(s); | |
494 | return 0; | |
495 | } | |
496 | ||
497 | static const VMStateDescription vmstate_cadence_uart = { | |
498 | .name = "cadence_uart", | |
2152e08a PC |
499 | .version_id = 2, |
500 | .minimum_version_id = 2, | |
35548b06 PC |
501 | .post_load = cadence_uart_post_load, |
502 | .fields = (VMStateField[]) { | |
e86da3cb PC |
503 | VMSTATE_UINT32_ARRAY(r, CadenceUARTState, CADENCE_UART_R_MAX), |
504 | VMSTATE_UINT8_ARRAY(rx_fifo, CadenceUARTState, | |
505 | CADENCE_UART_RX_FIFO_SIZE), | |
506 | VMSTATE_UINT8_ARRAY(tx_fifo, CadenceUARTState, | |
507 | CADENCE_UART_TX_FIFO_SIZE), | |
508 | VMSTATE_UINT32(rx_count, CadenceUARTState), | |
509 | VMSTATE_UINT32(tx_count, CadenceUARTState), | |
510 | VMSTATE_UINT32(rx_wpos, CadenceUARTState), | |
511 | VMSTATE_TIMER_PTR(fifo_trigger_handle, CadenceUARTState), | |
35548b06 PC |
512 | VMSTATE_END_OF_LIST() |
513 | } | |
514 | }; | |
515 | ||
516 | static void cadence_uart_class_init(ObjectClass *klass, void *data) | |
517 | { | |
518 | DeviceClass *dc = DEVICE_CLASS(klass); | |
35548b06 | 519 | |
96f20926 | 520 | dc->realize = cadence_uart_realize; |
35548b06 | 521 | dc->vmsd = &vmstate_cadence_uart; |
823dd487 | 522 | dc->reset = cadence_uart_reset; |
9f9bdf43 MA |
523 | /* Reason: realize() method uses qemu_char_get_next_serial() */ |
524 | dc->cannot_instantiate_with_device_add_yet = true; | |
35548b06 PC |
525 | } |
526 | ||
8c43a6f0 | 527 | static const TypeInfo cadence_uart_info = { |
534f6ff9 | 528 | .name = TYPE_CADENCE_UART, |
35548b06 | 529 | .parent = TYPE_SYS_BUS_DEVICE, |
e86da3cb | 530 | .instance_size = sizeof(CadenceUARTState), |
96f20926 | 531 | .instance_init = cadence_uart_init, |
35548b06 PC |
532 | .class_init = cadence_uart_class_init, |
533 | }; | |
534 | ||
535 | static void cadence_uart_register_types(void) | |
536 | { | |
537 | type_register_static(&cadence_uart_info); | |
538 | } | |
539 | ||
540 | type_init(cadence_uart_register_types) |