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exec/memory: Use struct Object typedef
[qemu/ar7.git] / hw / sd / allwinner-sdhost.c
blobbea6d97ef8767e113e70896ebc53c597b0a5eb04
1 /*
2 * Allwinner (sun4i and above) SD Host Controller emulation
3 *
4 * Copyright (C) 2019 Niek Linnenbank <nieklinnenbank@gmail.com>
5 *
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu/osdep.h"
21 #include "qemu/log.h"
22 #include "qemu/module.h"
23 #include "qemu/units.h"
24 #include "qapi/error.h"
25 #include "sysemu/blockdev.h"
26 #include "sysemu/dma.h"
27 #include "hw/qdev-properties.h"
28 #include "hw/irq.h"
29 #include "hw/sd/allwinner-sdhost.h"
30 #include "migration/vmstate.h"
31 #include "trace.h"
32 #include "qom/object.h"
33
34 #define TYPE_AW_SDHOST_BUS "allwinner-sdhost-bus"
35 /* This is reusing the SDBus typedef from SD_BUS */
36 DECLARE_INSTANCE_CHECKER(SDBus, AW_SDHOST_BUS,
37 TYPE_AW_SDHOST_BUS)
38
39 /* SD Host register offsets */
40 enum {
41 REG_SD_GCTL = 0x00, /* Global Control */
42 REG_SD_CKCR = 0x04, /* Clock Control */
43 REG_SD_TMOR = 0x08, /* Timeout */
44 REG_SD_BWDR = 0x0C, /* Bus Width */
45 REG_SD_BKSR = 0x10, /* Block Size */
46 REG_SD_BYCR = 0x14, /* Byte Count */
47 REG_SD_CMDR = 0x18, /* Command */
48 REG_SD_CAGR = 0x1C, /* Command Argument */
49 REG_SD_RESP0 = 0x20, /* Response Zero */
50 REG_SD_RESP1 = 0x24, /* Response One */
51 REG_SD_RESP2 = 0x28, /* Response Two */
52 REG_SD_RESP3 = 0x2C, /* Response Three */
53 REG_SD_IMKR = 0x30, /* Interrupt Mask */
54 REG_SD_MISR = 0x34, /* Masked Interrupt Status */
55 REG_SD_RISR = 0x38, /* Raw Interrupt Status */
56 REG_SD_STAR = 0x3C, /* Status */
57 REG_SD_FWLR = 0x40, /* FIFO Water Level */
58 REG_SD_FUNS = 0x44, /* FIFO Function Select */
59 REG_SD_DBGC = 0x50, /* Debug Enable */
60 REG_SD_A12A = 0x58, /* Auto command 12 argument */
61 REG_SD_NTSR = 0x5C, /* SD NewTiming Set */
62 REG_SD_SDBG = 0x60, /* SD newTiming Set Debug */
63 REG_SD_HWRST = 0x78, /* Hardware Reset Register */
64 REG_SD_DMAC = 0x80, /* Internal DMA Controller Control */
65 REG_SD_DLBA = 0x84, /* Descriptor List Base Address */
66 REG_SD_IDST = 0x88, /* Internal DMA Controller Status */
67 REG_SD_IDIE = 0x8C, /* Internal DMA Controller IRQ Enable */
68 REG_SD_THLDC = 0x100, /* Card Threshold Control */
69 REG_SD_DSBD = 0x10C, /* eMMC DDR Start Bit Detection Control */
70 REG_SD_RES_CRC = 0x110, /* Response CRC from card/eMMC */
71 REG_SD_DATA7_CRC = 0x114, /* CRC Data 7 from card/eMMC */
72 REG_SD_DATA6_CRC = 0x118, /* CRC Data 6 from card/eMMC */
73 REG_SD_DATA5_CRC = 0x11C, /* CRC Data 5 from card/eMMC */
74 REG_SD_DATA4_CRC = 0x120, /* CRC Data 4 from card/eMMC */
75 REG_SD_DATA3_CRC = 0x124, /* CRC Data 3 from card/eMMC */
76 REG_SD_DATA2_CRC = 0x128, /* CRC Data 2 from card/eMMC */
77 REG_SD_DATA1_CRC = 0x12C, /* CRC Data 1 from card/eMMC */
78 REG_SD_DATA0_CRC = 0x130, /* CRC Data 0 from card/eMMC */
79 REG_SD_CRC_STA = 0x134, /* CRC status from card/eMMC during write */
80 REG_SD_FIFO = 0x200, /* Read/Write FIFO */
81 };
82
83 /* SD Host register flags */
84 enum {
85 SD_GCTL_FIFO_AC_MOD = (1 << 31),
86 SD_GCTL_DDR_MOD_SEL = (1 << 10),
87 SD_GCTL_CD_DBC_ENB = (1 << 8),
88 SD_GCTL_DMA_ENB = (1 << 5),
89 SD_GCTL_INT_ENB = (1 << 4),
90 SD_GCTL_DMA_RST = (1 << 2),
91 SD_GCTL_FIFO_RST = (1 << 1),
92 SD_GCTL_SOFT_RST = (1 << 0),
93 };
94
95 enum {
96 SD_CMDR_LOAD = (1 << 31),
97 SD_CMDR_CLKCHANGE = (1 << 21),
98 SD_CMDR_WRITE = (1 << 10),
99 SD_CMDR_AUTOSTOP = (1 << 12),
100 SD_CMDR_DATA = (1 << 9),
101 SD_CMDR_RESPONSE_LONG = (1 << 7),
102 SD_CMDR_RESPONSE = (1 << 6),
103 SD_CMDR_CMDID_MASK = (0x3f),
104 };
105
106 enum {
107 SD_RISR_CARD_REMOVE = (1 << 31),
108 SD_RISR_CARD_INSERT = (1 << 30),
109 SD_RISR_SDIO_INTR = (1 << 16),
110 SD_RISR_AUTOCMD_DONE = (1 << 14),
111 SD_RISR_DATA_COMPLETE = (1 << 3),
112 SD_RISR_CMD_COMPLETE = (1 << 2),
113 SD_RISR_NO_RESPONSE = (1 << 1),
114 };
115
116 enum {
117 SD_STAR_CARD_PRESENT = (1 << 8),
118 };
119
120 enum {
121 SD_IDST_INT_SUMMARY = (1 << 8),
122 SD_IDST_RECEIVE_IRQ = (1 << 1),
123 SD_IDST_TRANSMIT_IRQ = (1 << 0),
124 SD_IDST_IRQ_MASK = (1 << 1) | (1 << 0) | (1 << 8),
125 SD_IDST_WR_MASK = (0x3ff),
126 };
127
128 /* SD Host register reset values */
129 enum {
130 REG_SD_GCTL_RST = 0x00000300,
131 REG_SD_CKCR_RST = 0x0,
132 REG_SD_TMOR_RST = 0xFFFFFF40,
133 REG_SD_BWDR_RST = 0x0,
134 REG_SD_BKSR_RST = 0x00000200,
135 REG_SD_BYCR_RST = 0x00000200,
136 REG_SD_CMDR_RST = 0x0,
137 REG_SD_CAGR_RST = 0x0,
138 REG_SD_RESP_RST = 0x0,
139 REG_SD_IMKR_RST = 0x0,
140 REG_SD_MISR_RST = 0x0,
141 REG_SD_RISR_RST = 0x0,
142 REG_SD_STAR_RST = 0x00000100,
143 REG_SD_FWLR_RST = 0x000F0000,
144 REG_SD_FUNS_RST = 0x0,
145 REG_SD_DBGC_RST = 0x0,
146 REG_SD_A12A_RST = 0x0000FFFF,
147 REG_SD_NTSR_RST = 0x00000001,
148 REG_SD_SDBG_RST = 0x0,
149 REG_SD_HWRST_RST = 0x00000001,
150 REG_SD_DMAC_RST = 0x0,
151 REG_SD_DLBA_RST = 0x0,
152 REG_SD_IDST_RST = 0x0,
153 REG_SD_IDIE_RST = 0x0,
154 REG_SD_THLDC_RST = 0x0,
155 REG_SD_DSBD_RST = 0x0,
156 REG_SD_RES_CRC_RST = 0x0,
157 REG_SD_DATA_CRC_RST = 0x0,
158 REG_SD_CRC_STA_RST = 0x0,
159 REG_SD_FIFO_RST = 0x0,
160 };
161
162 /* Data transfer descriptor for DMA */
163 typedef struct TransferDescriptor {
164 uint32_t status; /* Status flags */
165 uint32_t size; /* Data buffer size */
166 uint32_t addr; /* Data buffer address */
167 uint32_t next; /* Physical address of next descriptor */
168 } TransferDescriptor;
169
170 /* Data transfer descriptor flags */
171 enum {
172 DESC_STATUS_HOLD = (1 << 31), /* Set when descriptor is in use by DMA */
173 DESC_STATUS_ERROR = (1 << 30), /* Set when DMA transfer error occurred */
174 DESC_STATUS_CHAIN = (1 << 4), /* Indicates chained descriptor. */
175 DESC_STATUS_FIRST = (1 << 3), /* Set on the first descriptor */
176 DESC_STATUS_LAST = (1 << 2), /* Set on the last descriptor */
177 DESC_STATUS_NOIRQ = (1 << 1), /* Skip raising interrupt after transfer */
178 DESC_SIZE_MASK = (0xfffffffc)
179 };
180
181 static void allwinner_sdhost_update_irq(AwSdHostState *s)
182 {
183 uint32_t irq;
184
185 if (s->global_ctl & SD_GCTL_INT_ENB) {
186 irq = s->irq_status & s->irq_mask;
187 } else {
188 irq = 0;
189 }
190
191 trace_allwinner_sdhost_update_irq(irq);
192 qemu_set_irq(s->irq, irq);
193 }
194
195 static void allwinner_sdhost_update_transfer_cnt(AwSdHostState *s,
196 uint32_t bytes)
197 {
198 if (s->transfer_cnt > bytes) {
199 s->transfer_cnt -= bytes;
200 } else {
201 s->transfer_cnt = 0;
202 }
203
204 if (!s->transfer_cnt) {
205 s->irq_status |= SD_RISR_DATA_COMPLETE;
206 }
207 }
208
209 static void allwinner_sdhost_set_inserted(DeviceState *dev, bool inserted)
210 {
211 AwSdHostState *s = AW_SDHOST(dev);
212
213 trace_allwinner_sdhost_set_inserted(inserted);
214
215 if (inserted) {
216 s->irq_status |= SD_RISR_CARD_INSERT;
217 s->irq_status &= ~SD_RISR_CARD_REMOVE;
218 s->status |= SD_STAR_CARD_PRESENT;
219 } else {
220 s->irq_status &= ~SD_RISR_CARD_INSERT;
221 s->irq_status |= SD_RISR_CARD_REMOVE;
222 s->status &= ~SD_STAR_CARD_PRESENT;
223 }
224
225 allwinner_sdhost_update_irq(s);
226 }
227
228 static void allwinner_sdhost_send_command(AwSdHostState *s)
229 {
230 SDRequest request;
231 uint8_t resp[16];
232 int rlen;
233
234 /* Auto clear load flag */
235 s->command &= ~SD_CMDR_LOAD;
236
237 /* Clock change does not actually interact with the SD bus */
238 if (!(s->command & SD_CMDR_CLKCHANGE)) {
239
240 /* Prepare request */
241 request.cmd = s->command & SD_CMDR_CMDID_MASK;
242 request.arg = s->command_arg;
243
244 /* Send request to SD bus */
245 rlen = sdbus_do_command(&s->sdbus, &request, resp);
246 if (rlen < 0) {
247 goto error;
248 }
249
250 /* If the command has a response, store it in the response registers */
251 if ((s->command & SD_CMDR_RESPONSE)) {
252 if (rlen == 4 && !(s->command & SD_CMDR_RESPONSE_LONG)) {
253 s->response[0] = ldl_be_p(&resp[0]);
254 s->response[1] = s->response[2] = s->response[3] = 0;
255
256 } else if (rlen == 16 && (s->command & SD_CMDR_RESPONSE_LONG)) {
257 s->response[0] = ldl_be_p(&resp[12]);
258 s->response[1] = ldl_be_p(&resp[8]);
259 s->response[2] = ldl_be_p(&resp[4]);
260 s->response[3] = ldl_be_p(&resp[0]);
261 } else {
262 goto error;
263 }
264 }
265 }
266
267 /* Set interrupt status bits */
268 s->irq_status |= SD_RISR_CMD_COMPLETE;
269 return;
270
271 error:
272 s->irq_status |= SD_RISR_NO_RESPONSE;
273 }
274
275 static void allwinner_sdhost_auto_stop(AwSdHostState *s)
276 {
277 /*
278 * The stop command (CMD12) ensures the SD bus
279 * returns to the transfer state.
280 */
281 if ((s->command & SD_CMDR_AUTOSTOP) && (s->transfer_cnt == 0)) {
282 /* First save current command registers */
283 uint32_t saved_cmd = s->command;
284 uint32_t saved_arg = s->command_arg;
285
286 /* Prepare stop command (CMD12) */
287 s->command &= ~SD_CMDR_CMDID_MASK;
288 s->command |= 12; /* CMD12 */
289 s->command_arg = 0;
290
291 /* Put the command on SD bus */
292 allwinner_sdhost_send_command(s);
293
294 /* Restore command values */
295 s->command = saved_cmd;
296 s->command_arg = saved_arg;
297
298 /* Set IRQ status bit for automatic stop done */
299 s->irq_status |= SD_RISR_AUTOCMD_DONE;
300 }
301 }
302
303 static uint32_t allwinner_sdhost_process_desc(AwSdHostState *s,
304 hwaddr desc_addr,
305 TransferDescriptor *desc,
306 bool is_write, uint32_t max_bytes)
307 {
308 AwSdHostClass *klass = AW_SDHOST_GET_CLASS(s);
309 uint32_t num_done = 0;
310 uint32_t num_bytes = max_bytes;
311 uint8_t buf[1024];
312
313 /* Read descriptor */
314 dma_memory_read(&s->dma_as, desc_addr, desc, sizeof(*desc));
315 if (desc->size == 0) {
316 desc->size = klass->max_desc_size;
317 } else if (desc->size > klass->max_desc_size) {
318 qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA descriptor buffer size "
319 " is out-of-bounds: %" PRIu32 " > %zu",
320 __func__, desc->size, klass->max_desc_size);
321 desc->size = klass->max_desc_size;
322 }
323 if (desc->size < num_bytes) {
324 num_bytes = desc->size;
325 }
326
327 trace_allwinner_sdhost_process_desc(desc_addr, desc->size,
328 is_write, max_bytes);
329
330 while (num_done < num_bytes) {
331 /* Try to completely fill the local buffer */
332 uint32_t buf_bytes = num_bytes - num_done;
333 if (buf_bytes > sizeof(buf)) {
334 buf_bytes = sizeof(buf);
335 }
336
337 /* Write to SD bus */
338 if (is_write) {
339 dma_memory_read(&s->dma_as,
340 (desc->addr & DESC_SIZE_MASK) + num_done,
341 buf, buf_bytes);
342 sdbus_write_data(&s->sdbus, buf, buf_bytes);
343
344 /* Read from SD bus */
345 } else {
346 sdbus_read_data(&s->sdbus, buf, buf_bytes);
347 dma_memory_write(&s->dma_as,
348 (desc->addr & DESC_SIZE_MASK) + num_done,
349 buf, buf_bytes);
350 }
351 num_done += buf_bytes;
352 }
353
354 /* Clear hold flag and flush descriptor */
355 desc->status &= ~DESC_STATUS_HOLD;
356 dma_memory_write(&s->dma_as, desc_addr, desc, sizeof(*desc));
357
358 return num_done;
359 }
360
361 static void allwinner_sdhost_dma(AwSdHostState *s)
362 {
363 TransferDescriptor desc;
364 hwaddr desc_addr = s->desc_base;
365 bool is_write = (s->command & SD_CMDR_WRITE);
366 uint32_t bytes_done = 0;
367
368 /* Check if DMA can be performed */
369 if (s->byte_count == 0 || s->block_size == 0 ||
370 !(s->global_ctl & SD_GCTL_DMA_ENB)) {
371 return;
372 }
373
374 /*
375 * For read operations, data must be available on the SD bus
376 * If not, it is an error and we should not act at all
377 */
378 if (!is_write && !sdbus_data_ready(&s->sdbus)) {
379 return;
380 }
381
382 /* Process the DMA descriptors until all data is copied */
383 while (s->byte_count > 0) {
384 bytes_done = allwinner_sdhost_process_desc(s, desc_addr, &desc,
385 is_write, s->byte_count);
386 allwinner_sdhost_update_transfer_cnt(s, bytes_done);
387
388 if (bytes_done <= s->byte_count) {
389 s->byte_count -= bytes_done;
390 } else {
391 s->byte_count = 0;
392 }
393
394 if (desc.status & DESC_STATUS_LAST) {
395 break;
396 } else {
397 desc_addr = desc.next;
398 }
399 }
400
401 /* Raise IRQ to signal DMA is completed */
402 s->irq_status |= SD_RISR_DATA_COMPLETE | SD_RISR_SDIO_INTR;
403
404 /* Update DMAC bits */
405 s->dmac_status |= SD_IDST_INT_SUMMARY;
406
407 if (is_write) {
408 s->dmac_status |= SD_IDST_TRANSMIT_IRQ;
409 } else {
410 s->dmac_status |= SD_IDST_RECEIVE_IRQ;
411 }
412 }
413
414 static uint64_t allwinner_sdhost_read(void *opaque, hwaddr offset,
415 unsigned size)
416 {
417 AwSdHostState *s = AW_SDHOST(opaque);
418 uint32_t res = 0;
419
420 switch (offset) {
421 case REG_SD_GCTL: /* Global Control */
422 res = s->global_ctl;
423 break;
424 case REG_SD_CKCR: /* Clock Control */
425 res = s->clock_ctl;
426 break;
427 case REG_SD_TMOR: /* Timeout */
428 res = s->timeout;
429 break;
430 case REG_SD_BWDR: /* Bus Width */
431 res = s->bus_width;
432 break;
433 case REG_SD_BKSR: /* Block Size */
434 res = s->block_size;
435 break;
436 case REG_SD_BYCR: /* Byte Count */
437 res = s->byte_count;
438 break;
439 case REG_SD_CMDR: /* Command */
440 res = s->command;
441 break;
442 case REG_SD_CAGR: /* Command Argument */
443 res = s->command_arg;
444 break;
445 case REG_SD_RESP0: /* Response Zero */
446 res = s->response[0];
447 break;
448 case REG_SD_RESP1: /* Response One */
449 res = s->response[1];
450 break;
451 case REG_SD_RESP2: /* Response Two */
452 res = s->response[2];
453 break;
454 case REG_SD_RESP3: /* Response Three */
455 res = s->response[3];
456 break;
457 case REG_SD_IMKR: /* Interrupt Mask */
458 res = s->irq_mask;
459 break;
460 case REG_SD_MISR: /* Masked Interrupt Status */
461 res = s->irq_status & s->irq_mask;
462 break;
463 case REG_SD_RISR: /* Raw Interrupt Status */
464 res = s->irq_status;
465 break;
466 case REG_SD_STAR: /* Status */
467 res = s->status;
468 break;
469 case REG_SD_FWLR: /* FIFO Water Level */
470 res = s->fifo_wlevel;
471 break;
472 case REG_SD_FUNS: /* FIFO Function Select */
473 res = s->fifo_func_sel;
474 break;
475 case REG_SD_DBGC: /* Debug Enable */
476 res = s->debug_enable;
477 break;
478 case REG_SD_A12A: /* Auto command 12 argument */
479 res = s->auto12_arg;
480 break;
481 case REG_SD_NTSR: /* SD NewTiming Set */
482 res = s->newtiming_set;
483 break;
484 case REG_SD_SDBG: /* SD newTiming Set Debug */
485 res = s->newtiming_debug;
486 break;
487 case REG_SD_HWRST: /* Hardware Reset Register */
488 res = s->hardware_rst;
489 break;
490 case REG_SD_DMAC: /* Internal DMA Controller Control */
491 res = s->dmac;
492 break;
493 case REG_SD_DLBA: /* Descriptor List Base Address */
494 res = s->desc_base;
495 break;
496 case REG_SD_IDST: /* Internal DMA Controller Status */
497 res = s->dmac_status;
498 break;
499 case REG_SD_IDIE: /* Internal DMA Controller Interrupt Enable */
500 res = s->dmac_irq;
501 break;
502 case REG_SD_THLDC: /* Card Threshold Control */
503 res = s->card_threshold;
504 break;
505 case REG_SD_DSBD: /* eMMC DDR Start Bit Detection Control */
506 res = s->startbit_detect;
507 break;
508 case REG_SD_RES_CRC: /* Response CRC from card/eMMC */
509 res = s->response_crc;
510 break;
511 case REG_SD_DATA7_CRC: /* CRC Data 7 from card/eMMC */
512 case REG_SD_DATA6_CRC: /* CRC Data 6 from card/eMMC */
513 case REG_SD_DATA5_CRC: /* CRC Data 5 from card/eMMC */
514 case REG_SD_DATA4_CRC: /* CRC Data 4 from card/eMMC */
515 case REG_SD_DATA3_CRC: /* CRC Data 3 from card/eMMC */
516 case REG_SD_DATA2_CRC: /* CRC Data 2 from card/eMMC */
517 case REG_SD_DATA1_CRC: /* CRC Data 1 from card/eMMC */
518 case REG_SD_DATA0_CRC: /* CRC Data 0 from card/eMMC */
519 res = s->data_crc[((offset - REG_SD_DATA7_CRC) / sizeof(uint32_t))];
520 break;
521 case REG_SD_CRC_STA: /* CRC status from card/eMMC in write operation */
522 res = s->status_crc;
523 break;
524 case REG_SD_FIFO: /* Read/Write FIFO */
525 if (sdbus_data_ready(&s->sdbus)) {
526 sdbus_read_data(&s->sdbus, &res, sizeof(uint32_t));
527 le32_to_cpus(&res);
528 allwinner_sdhost_update_transfer_cnt(s, sizeof(uint32_t));
529 allwinner_sdhost_auto_stop(s);
530 allwinner_sdhost_update_irq(s);
531 } else {
532 qemu_log_mask(LOG_GUEST_ERROR, "%s: no data ready on SD bus\n",
533 __func__);
534 }
535 break;
536 default:
537 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset %"
538 HWADDR_PRIx"\n", __func__, offset);
539 res = 0;
540 break;
541 }
542
543 trace_allwinner_sdhost_read(offset, res, size);
544 return res;
545 }
546
547 static void allwinner_sdhost_write(void *opaque, hwaddr offset,
548 uint64_t value, unsigned size)
549 {
550 AwSdHostState *s = AW_SDHOST(opaque);
551 uint32_t u32;
552
553 trace_allwinner_sdhost_write(offset, value, size);
554
555 switch (offset) {
556 case REG_SD_GCTL: /* Global Control */
557 s->global_ctl = value;
558 s->global_ctl &= ~(SD_GCTL_DMA_RST | SD_GCTL_FIFO_RST |
559 SD_GCTL_SOFT_RST);
560 allwinner_sdhost_update_irq(s);
561 break;
562 case REG_SD_CKCR: /* Clock Control */
563 s->clock_ctl = value;
564 break;
565 case REG_SD_TMOR: /* Timeout */
566 s->timeout = value;
567 break;
568 case REG_SD_BWDR: /* Bus Width */
569 s->bus_width = value;
570 break;
571 case REG_SD_BKSR: /* Block Size */
572 s->block_size = value;
573 break;
574 case REG_SD_BYCR: /* Byte Count */
575 s->byte_count = value;
576 s->transfer_cnt = value;
577 break;
578 case REG_SD_CMDR: /* Command */
579 s->command = value;
580 if (value & SD_CMDR_LOAD) {
581 allwinner_sdhost_send_command(s);
582 allwinner_sdhost_dma(s);
583 allwinner_sdhost_auto_stop(s);
584 }
585 allwinner_sdhost_update_irq(s);
586 break;
587 case REG_SD_CAGR: /* Command Argument */
588 s->command_arg = value;
589 break;
590 case REG_SD_RESP0: /* Response Zero */
591 s->response[0] = value;
592 break;
593 case REG_SD_RESP1: /* Response One */
594 s->response[1] = value;
595 break;
596 case REG_SD_RESP2: /* Response Two */
597 s->response[2] = value;
598 break;
599 case REG_SD_RESP3: /* Response Three */
600 s->response[3] = value;
601 break;
602 case REG_SD_IMKR: /* Interrupt Mask */
603 s->irq_mask = value;
604 allwinner_sdhost_update_irq(s);
605 break;
606 case REG_SD_MISR: /* Masked Interrupt Status */
607 case REG_SD_RISR: /* Raw Interrupt Status */
608 s->irq_status &= ~value;
609 allwinner_sdhost_update_irq(s);
610 break;
611 case REG_SD_STAR: /* Status */
612 s->status &= ~value;
613 allwinner_sdhost_update_irq(s);
614 break;
615 case REG_SD_FWLR: /* FIFO Water Level */
616 s->fifo_wlevel = value;
617 break;
618 case REG_SD_FUNS: /* FIFO Function Select */
619 s->fifo_func_sel = value;
620 break;
621 case REG_SD_DBGC: /* Debug Enable */
622 s->debug_enable = value;
623 break;
624 case REG_SD_A12A: /* Auto command 12 argument */
625 s->auto12_arg = value;
626 break;
627 case REG_SD_NTSR: /* SD NewTiming Set */
628 s->newtiming_set = value;
629 break;
630 case REG_SD_SDBG: /* SD newTiming Set Debug */
631 s->newtiming_debug = value;
632 break;
633 case REG_SD_HWRST: /* Hardware Reset Register */
634 s->hardware_rst = value;
635 break;
636 case REG_SD_DMAC: /* Internal DMA Controller Control */
637 s->dmac = value;
638 allwinner_sdhost_update_irq(s);
639 break;
640 case REG_SD_DLBA: /* Descriptor List Base Address */
641 s->desc_base = value;
642 break;
643 case REG_SD_IDST: /* Internal DMA Controller Status */
644 s->dmac_status &= (~SD_IDST_WR_MASK) | (~value & SD_IDST_WR_MASK);
645 allwinner_sdhost_update_irq(s);
646 break;
647 case REG_SD_IDIE: /* Internal DMA Controller Interrupt Enable */
648 s->dmac_irq = value;
649 allwinner_sdhost_update_irq(s);
650 break;
651 case REG_SD_THLDC: /* Card Threshold Control */
652 s->card_threshold = value;
653 break;
654 case REG_SD_DSBD: /* eMMC DDR Start Bit Detection Control */
655 s->startbit_detect = value;
656 break;
657 case REG_SD_FIFO: /* Read/Write FIFO */
658 u32 = cpu_to_le32(value);
659 sdbus_write_data(&s->sdbus, &u32, sizeof(u32));
660 allwinner_sdhost_update_transfer_cnt(s, sizeof(u32));
661 allwinner_sdhost_auto_stop(s);
662 allwinner_sdhost_update_irq(s);
663 break;
664 case REG_SD_RES_CRC: /* Response CRC from card/eMMC */
665 case REG_SD_DATA7_CRC: /* CRC Data 7 from card/eMMC */
666 case REG_SD_DATA6_CRC: /* CRC Data 6 from card/eMMC */
667 case REG_SD_DATA5_CRC: /* CRC Data 5 from card/eMMC */
668 case REG_SD_DATA4_CRC: /* CRC Data 4 from card/eMMC */
669 case REG_SD_DATA3_CRC: /* CRC Data 3 from card/eMMC */
670 case REG_SD_DATA2_CRC: /* CRC Data 2 from card/eMMC */
671 case REG_SD_DATA1_CRC: /* CRC Data 1 from card/eMMC */
672 case REG_SD_DATA0_CRC: /* CRC Data 0 from card/eMMC */
673 case REG_SD_CRC_STA: /* CRC status from card/eMMC in write operation */
674 break;
675 default:
676 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset %"
677 HWADDR_PRIx"\n", __func__, offset);
678 break;
679 }
680 }
681
682 static const MemoryRegionOps allwinner_sdhost_ops = {
683 .read = allwinner_sdhost_read,
684 .write = allwinner_sdhost_write,
685 .endianness = DEVICE_NATIVE_ENDIAN,
686 .valid = {
687 .min_access_size = 4,
688 .max_access_size = 4,
689 },
690 .impl.min_access_size = 4,
691 };
692
693 static const VMStateDescription vmstate_allwinner_sdhost = {
694 .name = "allwinner-sdhost",
695 .version_id = 1,
696 .minimum_version_id = 1,
697 .fields = (VMStateField[]) {
698 VMSTATE_UINT32(global_ctl, AwSdHostState),
699 VMSTATE_UINT32(clock_ctl, AwSdHostState),
700 VMSTATE_UINT32(timeout, AwSdHostState),
701 VMSTATE_UINT32(bus_width, AwSdHostState),
702 VMSTATE_UINT32(block_size, AwSdHostState),
703 VMSTATE_UINT32(byte_count, AwSdHostState),
704 VMSTATE_UINT32(transfer_cnt, AwSdHostState),
705 VMSTATE_UINT32(command, AwSdHostState),
706 VMSTATE_UINT32(command_arg, AwSdHostState),
707 VMSTATE_UINT32_ARRAY(response, AwSdHostState, 4),
708 VMSTATE_UINT32(irq_mask, AwSdHostState),
709 VMSTATE_UINT32(irq_status, AwSdHostState),
710 VMSTATE_UINT32(status, AwSdHostState),
711 VMSTATE_UINT32(fifo_wlevel, AwSdHostState),
712 VMSTATE_UINT32(fifo_func_sel, AwSdHostState),
713 VMSTATE_UINT32(debug_enable, AwSdHostState),
714 VMSTATE_UINT32(auto12_arg, AwSdHostState),
715 VMSTATE_UINT32(newtiming_set, AwSdHostState),
716 VMSTATE_UINT32(newtiming_debug, AwSdHostState),
717 VMSTATE_UINT32(hardware_rst, AwSdHostState),
718 VMSTATE_UINT32(dmac, AwSdHostState),
719 VMSTATE_UINT32(desc_base, AwSdHostState),
720 VMSTATE_UINT32(dmac_status, AwSdHostState),
721 VMSTATE_UINT32(dmac_irq, AwSdHostState),
722 VMSTATE_UINT32(card_threshold, AwSdHostState),
723 VMSTATE_UINT32(startbit_detect, AwSdHostState),
724 VMSTATE_UINT32(response_crc, AwSdHostState),
725 VMSTATE_UINT32_ARRAY(data_crc, AwSdHostState, 8),
726 VMSTATE_UINT32(status_crc, AwSdHostState),
727 VMSTATE_END_OF_LIST()
728 }
729 };
730
731 static Property allwinner_sdhost_properties[] = {
732 DEFINE_PROP_LINK("dma-memory", AwSdHostState, dma_mr,
733 TYPE_MEMORY_REGION, MemoryRegion *),
734 DEFINE_PROP_END_OF_LIST(),
735 };
736
737 static void allwinner_sdhost_init(Object *obj)
738 {
739 AwSdHostState *s = AW_SDHOST(obj);
740
741 qbus_create_inplace(&s->sdbus, sizeof(s->sdbus),
742 TYPE_AW_SDHOST_BUS, DEVICE(s), "sd-bus");
743
744 memory_region_init_io(&s->iomem, obj, &allwinner_sdhost_ops, s,
745 TYPE_AW_SDHOST, 4 * KiB);
746 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
747 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->irq);
748 }
749
750 static void allwinner_sdhost_realize(DeviceState *dev, Error **errp)
751 {
752 AwSdHostState *s = AW_SDHOST(dev);
753
754 if (!s->dma_mr) {
755 error_setg(errp, TYPE_AW_SDHOST " 'dma-memory' link not set");
756 return;
757 }
758
759 address_space_init(&s->dma_as, s->dma_mr, "sdhost-dma");
760 }
761
762 static void allwinner_sdhost_reset(DeviceState *dev)
763 {
764 AwSdHostState *s = AW_SDHOST(dev);
765
766 s->global_ctl = REG_SD_GCTL_RST;
767 s->clock_ctl = REG_SD_CKCR_RST;
768 s->timeout = REG_SD_TMOR_RST;
769 s->bus_width = REG_SD_BWDR_RST;
770 s->block_size = REG_SD_BKSR_RST;
771 s->byte_count = REG_SD_BYCR_RST;
772 s->transfer_cnt = 0;
773
774 s->command = REG_SD_CMDR_RST;
775 s->command_arg = REG_SD_CAGR_RST;
776
777 for (int i = 0; i < ARRAY_SIZE(s->response); i++) {
778 s->response[i] = REG_SD_RESP_RST;
779 }
780
781 s->irq_mask = REG_SD_IMKR_RST;
782 s->irq_status = REG_SD_RISR_RST;
783 s->status = REG_SD_STAR_RST;
784
785 s->fifo_wlevel = REG_SD_FWLR_RST;
786 s->fifo_func_sel = REG_SD_FUNS_RST;
787 s->debug_enable = REG_SD_DBGC_RST;
788 s->auto12_arg = REG_SD_A12A_RST;
789 s->newtiming_set = REG_SD_NTSR_RST;
790 s->newtiming_debug = REG_SD_SDBG_RST;
791 s->hardware_rst = REG_SD_HWRST_RST;
792 s->dmac = REG_SD_DMAC_RST;
793 s->desc_base = REG_SD_DLBA_RST;
794 s->dmac_status = REG_SD_IDST_RST;
795 s->dmac_irq = REG_SD_IDIE_RST;
796 s->card_threshold = REG_SD_THLDC_RST;
797 s->startbit_detect = REG_SD_DSBD_RST;
798 s->response_crc = REG_SD_RES_CRC_RST;
799
800 for (int i = 0; i < ARRAY_SIZE(s->data_crc); i++) {
801 s->data_crc[i] = REG_SD_DATA_CRC_RST;
802 }
803
804 s->status_crc = REG_SD_CRC_STA_RST;
805 }
806
807 static void allwinner_sdhost_bus_class_init(ObjectClass *klass, void *data)
808 {
809 SDBusClass *sbc = SD_BUS_CLASS(klass);
810
811 sbc->set_inserted = allwinner_sdhost_set_inserted;
812 }
813
814 static void allwinner_sdhost_class_init(ObjectClass *klass, void *data)
815 {
816 DeviceClass *dc = DEVICE_CLASS(klass);
817
818 dc->reset = allwinner_sdhost_reset;
819 dc->vmsd = &vmstate_allwinner_sdhost;
820 dc->realize = allwinner_sdhost_realize;
821 device_class_set_props(dc, allwinner_sdhost_properties);
822 }
823
824 static void allwinner_sdhost_sun4i_class_init(ObjectClass *klass, void *data)
825 {
826 AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
827 sc->max_desc_size = 8 * KiB;
828 }
829
830 static void allwinner_sdhost_sun5i_class_init(ObjectClass *klass, void *data)
831 {
832 AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
833 sc->max_desc_size = 64 * KiB;
834 }
835
836 static TypeInfo allwinner_sdhost_info = {
837 .name = TYPE_AW_SDHOST,
838 .parent = TYPE_SYS_BUS_DEVICE,
839 .instance_init = allwinner_sdhost_init,
840 .instance_size = sizeof(AwSdHostState),
841 .class_init = allwinner_sdhost_class_init,
842 .class_size = sizeof(AwSdHostClass),
843 .abstract = true,
844 };
845
846 static const TypeInfo allwinner_sdhost_sun4i_info = {
847 .name = TYPE_AW_SDHOST_SUN4I,
848 .parent = TYPE_AW_SDHOST,
849 .class_init = allwinner_sdhost_sun4i_class_init,
850 };
851
852 static const TypeInfo allwinner_sdhost_sun5i_info = {
853 .name = TYPE_AW_SDHOST_SUN5I,
854 .parent = TYPE_AW_SDHOST,
855 .class_init = allwinner_sdhost_sun5i_class_init,
856 };
857
858 static const TypeInfo allwinner_sdhost_bus_info = {
859 .name = TYPE_AW_SDHOST_BUS,
860 .parent = TYPE_SD_BUS,
861 .instance_size = sizeof(SDBus),
862 .class_init = allwinner_sdhost_bus_class_init,
863 };
864
865 static void allwinner_sdhost_register_types(void)
866 {
867 type_register_static(&allwinner_sdhost_info);
868 type_register_static(&allwinner_sdhost_sun4i_info);
869 type_register_static(&allwinner_sdhost_sun5i_info);
870 type_register_static(&allwinner_sdhost_bus_info);
871 }
872
873 type_init(allwinner_sdhost_register_types)
AR7 emulation for QEMU