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virtio-ccw-input: fix description
[qemu/ar7.git] / hw / sd / allwinner-sdhost.c
blobf9eb92c09ed372e980480a37033e240e2a2b0cc0
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 "sysemu/blockdev.h"
25 #include "hw/irq.h"
26 #include "hw/sd/allwinner-sdhost.h"
27 #include "migration/vmstate.h"
28 #include "trace.h"
29
30 #define TYPE_AW_SDHOST_BUS "allwinner-sdhost-bus"
31 #define AW_SDHOST_BUS(obj) \
32 OBJECT_CHECK(SDBus, (obj), TYPE_AW_SDHOST_BUS)
33
34 /* SD Host register offsets */
35 enum {
36 REG_SD_GCTL = 0x00, /* Global Control */
37 REG_SD_CKCR = 0x04, /* Clock Control */
38 REG_SD_TMOR = 0x08, /* Timeout */
39 REG_SD_BWDR = 0x0C, /* Bus Width */
40 REG_SD_BKSR = 0x10, /* Block Size */
41 REG_SD_BYCR = 0x14, /* Byte Count */
42 REG_SD_CMDR = 0x18, /* Command */
43 REG_SD_CAGR = 0x1C, /* Command Argument */
44 REG_SD_RESP0 = 0x20, /* Response Zero */
45 REG_SD_RESP1 = 0x24, /* Response One */
46 REG_SD_RESP2 = 0x28, /* Response Two */
47 REG_SD_RESP3 = 0x2C, /* Response Three */
48 REG_SD_IMKR = 0x30, /* Interrupt Mask */
49 REG_SD_MISR = 0x34, /* Masked Interrupt Status */
50 REG_SD_RISR = 0x38, /* Raw Interrupt Status */
51 REG_SD_STAR = 0x3C, /* Status */
52 REG_SD_FWLR = 0x40, /* FIFO Water Level */
53 REG_SD_FUNS = 0x44, /* FIFO Function Select */
54 REG_SD_DBGC = 0x50, /* Debug Enable */
55 REG_SD_A12A = 0x58, /* Auto command 12 argument */
56 REG_SD_NTSR = 0x5C, /* SD NewTiming Set */
57 REG_SD_SDBG = 0x60, /* SD newTiming Set Debug */
58 REG_SD_HWRST = 0x78, /* Hardware Reset Register */
59 REG_SD_DMAC = 0x80, /* Internal DMA Controller Control */
60 REG_SD_DLBA = 0x84, /* Descriptor List Base Address */
61 REG_SD_IDST = 0x88, /* Internal DMA Controller Status */
62 REG_SD_IDIE = 0x8C, /* Internal DMA Controller IRQ Enable */
63 REG_SD_THLDC = 0x100, /* Card Threshold Control */
64 REG_SD_DSBD = 0x10C, /* eMMC DDR Start Bit Detection Control */
65 REG_SD_RES_CRC = 0x110, /* Response CRC from card/eMMC */
66 REG_SD_DATA7_CRC = 0x114, /* CRC Data 7 from card/eMMC */
67 REG_SD_DATA6_CRC = 0x118, /* CRC Data 6 from card/eMMC */
68 REG_SD_DATA5_CRC = 0x11C, /* CRC Data 5 from card/eMMC */
69 REG_SD_DATA4_CRC = 0x120, /* CRC Data 4 from card/eMMC */
70 REG_SD_DATA3_CRC = 0x124, /* CRC Data 3 from card/eMMC */
71 REG_SD_DATA2_CRC = 0x128, /* CRC Data 2 from card/eMMC */
72 REG_SD_DATA1_CRC = 0x12C, /* CRC Data 1 from card/eMMC */
73 REG_SD_DATA0_CRC = 0x130, /* CRC Data 0 from card/eMMC */
74 REG_SD_CRC_STA = 0x134, /* CRC status from card/eMMC during write */
75 REG_SD_FIFO = 0x200, /* Read/Write FIFO */
76 };
77
78 /* SD Host register flags */
79 enum {
80 SD_GCTL_FIFO_AC_MOD = (1 << 31),
81 SD_GCTL_DDR_MOD_SEL = (1 << 10),
82 SD_GCTL_CD_DBC_ENB = (1 << 8),
83 SD_GCTL_DMA_ENB = (1 << 5),
84 SD_GCTL_INT_ENB = (1 << 4),
85 SD_GCTL_DMA_RST = (1 << 2),
86 SD_GCTL_FIFO_RST = (1 << 1),
87 SD_GCTL_SOFT_RST = (1 << 0),
88 };
89
90 enum {
91 SD_CMDR_LOAD = (1 << 31),
92 SD_CMDR_CLKCHANGE = (1 << 21),
93 SD_CMDR_WRITE = (1 << 10),
94 SD_CMDR_AUTOSTOP = (1 << 12),
95 SD_CMDR_DATA = (1 << 9),
96 SD_CMDR_RESPONSE_LONG = (1 << 7),
97 SD_CMDR_RESPONSE = (1 << 6),
98 SD_CMDR_CMDID_MASK = (0x3f),
99 };
100
101 enum {
102 SD_RISR_CARD_REMOVE = (1 << 31),
103 SD_RISR_CARD_INSERT = (1 << 30),
104 SD_RISR_SDIO_INTR = (1 << 16),
105 SD_RISR_AUTOCMD_DONE = (1 << 14),
106 SD_RISR_DATA_COMPLETE = (1 << 3),
107 SD_RISR_CMD_COMPLETE = (1 << 2),
108 SD_RISR_NO_RESPONSE = (1 << 1),
109 };
110
111 enum {
112 SD_STAR_CARD_PRESENT = (1 << 8),
113 };
114
115 enum {
116 SD_IDST_INT_SUMMARY = (1 << 8),
117 SD_IDST_RECEIVE_IRQ = (1 << 1),
118 SD_IDST_TRANSMIT_IRQ = (1 << 0),
119 SD_IDST_IRQ_MASK = (1 << 1) | (1 << 0) | (1 << 8),
120 SD_IDST_WR_MASK = (0x3ff),
121 };
122
123 /* SD Host register reset values */
124 enum {
125 REG_SD_GCTL_RST = 0x00000300,
126 REG_SD_CKCR_RST = 0x0,
127 REG_SD_TMOR_RST = 0xFFFFFF40,
128 REG_SD_BWDR_RST = 0x0,
129 REG_SD_BKSR_RST = 0x00000200,
130 REG_SD_BYCR_RST = 0x00000200,
131 REG_SD_CMDR_RST = 0x0,
132 REG_SD_CAGR_RST = 0x0,
133 REG_SD_RESP_RST = 0x0,
134 REG_SD_IMKR_RST = 0x0,
135 REG_SD_MISR_RST = 0x0,
136 REG_SD_RISR_RST = 0x0,
137 REG_SD_STAR_RST = 0x00000100,
138 REG_SD_FWLR_RST = 0x000F0000,
139 REG_SD_FUNS_RST = 0x0,
140 REG_SD_DBGC_RST = 0x0,
141 REG_SD_A12A_RST = 0x0000FFFF,
142 REG_SD_NTSR_RST = 0x00000001,
143 REG_SD_SDBG_RST = 0x0,
144 REG_SD_HWRST_RST = 0x00000001,
145 REG_SD_DMAC_RST = 0x0,
146 REG_SD_DLBA_RST = 0x0,
147 REG_SD_IDST_RST = 0x0,
148 REG_SD_IDIE_RST = 0x0,
149 REG_SD_THLDC_RST = 0x0,
150 REG_SD_DSBD_RST = 0x0,
151 REG_SD_RES_CRC_RST = 0x0,
152 REG_SD_DATA_CRC_RST = 0x0,
153 REG_SD_CRC_STA_RST = 0x0,
154 REG_SD_FIFO_RST = 0x0,
155 };
156
157 /* Data transfer descriptor for DMA */
158 typedef struct TransferDescriptor {
159 uint32_t status; /* Status flags */
160 uint32_t size; /* Data buffer size */
161 uint32_t addr; /* Data buffer address */
162 uint32_t next; /* Physical address of next descriptor */
163 } TransferDescriptor;
164
165 /* Data transfer descriptor flags */
166 enum {
167 DESC_STATUS_HOLD = (1 << 31), /* Set when descriptor is in use by DMA */
168 DESC_STATUS_ERROR = (1 << 30), /* Set when DMA transfer error occurred */
169 DESC_STATUS_CHAIN = (1 << 4), /* Indicates chained descriptor. */
170 DESC_STATUS_FIRST = (1 << 3), /* Set on the first descriptor */
171 DESC_STATUS_LAST = (1 << 2), /* Set on the last descriptor */
172 DESC_STATUS_NOIRQ = (1 << 1), /* Skip raising interrupt after transfer */
173 DESC_SIZE_MASK = (0xfffffffc)
174 };
175
176 static void allwinner_sdhost_update_irq(AwSdHostState *s)
177 {
178 uint32_t irq;
179
180 if (s->global_ctl & SD_GCTL_INT_ENB) {
181 irq = s->irq_status & s->irq_mask;
182 } else {
183 irq = 0;
184 }
185
186 trace_allwinner_sdhost_update_irq(irq);
187 qemu_set_irq(s->irq, irq);
188 }
189
190 static void allwinner_sdhost_update_transfer_cnt(AwSdHostState *s,
191 uint32_t bytes)
192 {
193 if (s->transfer_cnt > bytes) {
194 s->transfer_cnt -= bytes;
195 } else {
196 s->transfer_cnt = 0;
197 }
198
199 if (!s->transfer_cnt) {
200 s->irq_status |= SD_RISR_DATA_COMPLETE;
201 }
202 }
203
204 static void allwinner_sdhost_set_inserted(DeviceState *dev, bool inserted)
205 {
206 AwSdHostState *s = AW_SDHOST(dev);
207
208 trace_allwinner_sdhost_set_inserted(inserted);
209
210 if (inserted) {
211 s->irq_status |= SD_RISR_CARD_INSERT;
212 s->irq_status &= ~SD_RISR_CARD_REMOVE;
213 s->status |= SD_STAR_CARD_PRESENT;
214 } else {
215 s->irq_status &= ~SD_RISR_CARD_INSERT;
216 s->irq_status |= SD_RISR_CARD_REMOVE;
217 s->status &= ~SD_STAR_CARD_PRESENT;
218 }
219
220 allwinner_sdhost_update_irq(s);
221 }
222
223 static void allwinner_sdhost_send_command(AwSdHostState *s)
224 {
225 SDRequest request;
226 uint8_t resp[16];
227 int rlen;
228
229 /* Auto clear load flag */
230 s->command &= ~SD_CMDR_LOAD;
231
232 /* Clock change does not actually interact with the SD bus */
233 if (!(s->command & SD_CMDR_CLKCHANGE)) {
234
235 /* Prepare request */
236 request.cmd = s->command & SD_CMDR_CMDID_MASK;
237 request.arg = s->command_arg;
238
239 /* Send request to SD bus */
240 rlen = sdbus_do_command(&s->sdbus, &request, resp);
241 if (rlen < 0) {
242 goto error;
243 }
244
245 /* If the command has a response, store it in the response registers */
246 if ((s->command & SD_CMDR_RESPONSE)) {
247 if (rlen == 4 && !(s->command & SD_CMDR_RESPONSE_LONG)) {
248 s->response[0] = ldl_be_p(&resp[0]);
249 s->response[1] = s->response[2] = s->response[3] = 0;
250
251 } else if (rlen == 16 && (s->command & SD_CMDR_RESPONSE_LONG)) {
252 s->response[0] = ldl_be_p(&resp[12]);
253 s->response[1] = ldl_be_p(&resp[8]);
254 s->response[2] = ldl_be_p(&resp[4]);
255 s->response[3] = ldl_be_p(&resp[0]);
256 } else {
257 goto error;
258 }
259 }
260 }
261
262 /* Set interrupt status bits */
263 s->irq_status |= SD_RISR_CMD_COMPLETE;
264 return;
265
266 error:
267 s->irq_status |= SD_RISR_NO_RESPONSE;
268 }
269
270 static void allwinner_sdhost_auto_stop(AwSdHostState *s)
271 {
272 /*
273 * The stop command (CMD12) ensures the SD bus
274 * returns to the transfer state.
275 */
276 if ((s->command & SD_CMDR_AUTOSTOP) && (s->transfer_cnt == 0)) {
277 /* First save current command registers */
278 uint32_t saved_cmd = s->command;
279 uint32_t saved_arg = s->command_arg;
280
281 /* Prepare stop command (CMD12) */
282 s->command &= ~SD_CMDR_CMDID_MASK;
283 s->command |= 12; /* CMD12 */
284 s->command_arg = 0;
285
286 /* Put the command on SD bus */
287 allwinner_sdhost_send_command(s);
288
289 /* Restore command values */
290 s->command = saved_cmd;
291 s->command_arg = saved_arg;
292
293 /* Set IRQ status bit for automatic stop done */
294 s->irq_status |= SD_RISR_AUTOCMD_DONE;
295 }
296 }
297
298 static uint32_t allwinner_sdhost_process_desc(AwSdHostState *s,
299 hwaddr desc_addr,
300 TransferDescriptor *desc,
301 bool is_write, uint32_t max_bytes)
302 {
303 AwSdHostClass *klass = AW_SDHOST_GET_CLASS(s);
304 uint32_t num_done = 0;
305 uint32_t num_bytes = max_bytes;
306 uint8_t buf[1024];
307
308 /* Read descriptor */
309 cpu_physical_memory_read(desc_addr, desc, sizeof(*desc));
310 if (desc->size == 0) {
311 desc->size = klass->max_desc_size;
312 } else if (desc->size > klass->max_desc_size) {
313 qemu_log_mask(LOG_GUEST_ERROR, "%s: DMA descriptor buffer size "
314 " is out-of-bounds: %" PRIu32 " > %zu",
315 __func__, desc->size, klass->max_desc_size);
316 desc->size = klass->max_desc_size;
317 }
318 if (desc->size < num_bytes) {
319 num_bytes = desc->size;
320 }
321
322 trace_allwinner_sdhost_process_desc(desc_addr, desc->size,
323 is_write, max_bytes);
324
325 while (num_done < num_bytes) {
326 /* Try to completely fill the local buffer */
327 uint32_t buf_bytes = num_bytes - num_done;
328 if (buf_bytes > sizeof(buf)) {
329 buf_bytes = sizeof(buf);
330 }
331
332 /* Write to SD bus */
333 if (is_write) {
334 cpu_physical_memory_read((desc->addr & DESC_SIZE_MASK) + num_done,
335 buf, buf_bytes);
336 sdbus_write_data(&s->sdbus, buf, buf_bytes);
337
338 /* Read from SD bus */
339 } else {
340 sdbus_read_data(&s->sdbus, buf, buf_bytes);
341 cpu_physical_memory_write((desc->addr & DESC_SIZE_MASK) + num_done,
342 buf, buf_bytes);
343 }
344 num_done += buf_bytes;
345 }
346
347 /* Clear hold flag and flush descriptor */
348 desc->status &= ~DESC_STATUS_HOLD;
349 cpu_physical_memory_write(desc_addr, desc, sizeof(*desc));
350
351 return num_done;
352 }
353
354 static void allwinner_sdhost_dma(AwSdHostState *s)
355 {
356 TransferDescriptor desc;
357 hwaddr desc_addr = s->desc_base;
358 bool is_write = (s->command & SD_CMDR_WRITE);
359 uint32_t bytes_done = 0;
360
361 /* Check if DMA can be performed */
362 if (s->byte_count == 0 || s->block_size == 0 ||
363 !(s->global_ctl & SD_GCTL_DMA_ENB)) {
364 return;
365 }
366
367 /*
368 * For read operations, data must be available on the SD bus
369 * If not, it is an error and we should not act at all
370 */
371 if (!is_write && !sdbus_data_ready(&s->sdbus)) {
372 return;
373 }
374
375 /* Process the DMA descriptors until all data is copied */
376 while (s->byte_count > 0) {
377 bytes_done = allwinner_sdhost_process_desc(s, desc_addr, &desc,
378 is_write, s->byte_count);
379 allwinner_sdhost_update_transfer_cnt(s, bytes_done);
380
381 if (bytes_done <= s->byte_count) {
382 s->byte_count -= bytes_done;
383 } else {
384 s->byte_count = 0;
385 }
386
387 if (desc.status & DESC_STATUS_LAST) {
388 break;
389 } else {
390 desc_addr = desc.next;
391 }
392 }
393
394 /* Raise IRQ to signal DMA is completed */
395 s->irq_status |= SD_RISR_DATA_COMPLETE | SD_RISR_SDIO_INTR;
396
397 /* Update DMAC bits */
398 s->dmac_status |= SD_IDST_INT_SUMMARY;
399
400 if (is_write) {
401 s->dmac_status |= SD_IDST_TRANSMIT_IRQ;
402 } else {
403 s->dmac_status |= SD_IDST_RECEIVE_IRQ;
404 }
405 }
406
407 static uint64_t allwinner_sdhost_read(void *opaque, hwaddr offset,
408 unsigned size)
409 {
410 AwSdHostState *s = AW_SDHOST(opaque);
411 uint32_t res = 0;
412
413 switch (offset) {
414 case REG_SD_GCTL: /* Global Control */
415 res = s->global_ctl;
416 break;
417 case REG_SD_CKCR: /* Clock Control */
418 res = s->clock_ctl;
419 break;
420 case REG_SD_TMOR: /* Timeout */
421 res = s->timeout;
422 break;
423 case REG_SD_BWDR: /* Bus Width */
424 res = s->bus_width;
425 break;
426 case REG_SD_BKSR: /* Block Size */
427 res = s->block_size;
428 break;
429 case REG_SD_BYCR: /* Byte Count */
430 res = s->byte_count;
431 break;
432 case REG_SD_CMDR: /* Command */
433 res = s->command;
434 break;
435 case REG_SD_CAGR: /* Command Argument */
436 res = s->command_arg;
437 break;
438 case REG_SD_RESP0: /* Response Zero */
439 res = s->response[0];
440 break;
441 case REG_SD_RESP1: /* Response One */
442 res = s->response[1];
443 break;
444 case REG_SD_RESP2: /* Response Two */
445 res = s->response[2];
446 break;
447 case REG_SD_RESP3: /* Response Three */
448 res = s->response[3];
449 break;
450 case REG_SD_IMKR: /* Interrupt Mask */
451 res = s->irq_mask;
452 break;
453 case REG_SD_MISR: /* Masked Interrupt Status */
454 res = s->irq_status & s->irq_mask;
455 break;
456 case REG_SD_RISR: /* Raw Interrupt Status */
457 res = s->irq_status;
458 break;
459 case REG_SD_STAR: /* Status */
460 res = s->status;
461 break;
462 case REG_SD_FWLR: /* FIFO Water Level */
463 res = s->fifo_wlevel;
464 break;
465 case REG_SD_FUNS: /* FIFO Function Select */
466 res = s->fifo_func_sel;
467 break;
468 case REG_SD_DBGC: /* Debug Enable */
469 res = s->debug_enable;
470 break;
471 case REG_SD_A12A: /* Auto command 12 argument */
472 res = s->auto12_arg;
473 break;
474 case REG_SD_NTSR: /* SD NewTiming Set */
475 res = s->newtiming_set;
476 break;
477 case REG_SD_SDBG: /* SD newTiming Set Debug */
478 res = s->newtiming_debug;
479 break;
480 case REG_SD_HWRST: /* Hardware Reset Register */
481 res = s->hardware_rst;
482 break;
483 case REG_SD_DMAC: /* Internal DMA Controller Control */
484 res = s->dmac;
485 break;
486 case REG_SD_DLBA: /* Descriptor List Base Address */
487 res = s->desc_base;
488 break;
489 case REG_SD_IDST: /* Internal DMA Controller Status */
490 res = s->dmac_status;
491 break;
492 case REG_SD_IDIE: /* Internal DMA Controller Interrupt Enable */
493 res = s->dmac_irq;
494 break;
495 case REG_SD_THLDC: /* Card Threshold Control */
496 res = s->card_threshold;
497 break;
498 case REG_SD_DSBD: /* eMMC DDR Start Bit Detection Control */
499 res = s->startbit_detect;
500 break;
501 case REG_SD_RES_CRC: /* Response CRC from card/eMMC */
502 res = s->response_crc;
503 break;
504 case REG_SD_DATA7_CRC: /* CRC Data 7 from card/eMMC */
505 case REG_SD_DATA6_CRC: /* CRC Data 6 from card/eMMC */
506 case REG_SD_DATA5_CRC: /* CRC Data 5 from card/eMMC */
507 case REG_SD_DATA4_CRC: /* CRC Data 4 from card/eMMC */
508 case REG_SD_DATA3_CRC: /* CRC Data 3 from card/eMMC */
509 case REG_SD_DATA2_CRC: /* CRC Data 2 from card/eMMC */
510 case REG_SD_DATA1_CRC: /* CRC Data 1 from card/eMMC */
511 case REG_SD_DATA0_CRC: /* CRC Data 0 from card/eMMC */
512 res = s->data_crc[((offset - REG_SD_DATA7_CRC) / sizeof(uint32_t))];
513 break;
514 case REG_SD_CRC_STA: /* CRC status from card/eMMC in write operation */
515 res = s->status_crc;
516 break;
517 case REG_SD_FIFO: /* Read/Write FIFO */
518 if (sdbus_data_ready(&s->sdbus)) {
519 sdbus_read_data(&s->sdbus, &res, sizeof(uint32_t));
520 le32_to_cpus(&res);
521 allwinner_sdhost_update_transfer_cnt(s, sizeof(uint32_t));
522 allwinner_sdhost_auto_stop(s);
523 allwinner_sdhost_update_irq(s);
524 } else {
525 qemu_log_mask(LOG_GUEST_ERROR, "%s: no data ready on SD bus\n",
526 __func__);
527 }
528 break;
529 default:
530 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset %"
531 HWADDR_PRIx"\n", __func__, offset);
532 res = 0;
533 break;
534 }
535
536 trace_allwinner_sdhost_read(offset, res, size);
537 return res;
538 }
539
540 static void allwinner_sdhost_write(void *opaque, hwaddr offset,
541 uint64_t value, unsigned size)
542 {
543 AwSdHostState *s = AW_SDHOST(opaque);
544 uint32_t u32;
545
546 trace_allwinner_sdhost_write(offset, value, size);
547
548 switch (offset) {
549 case REG_SD_GCTL: /* Global Control */
550 s->global_ctl = value;
551 s->global_ctl &= ~(SD_GCTL_DMA_RST | SD_GCTL_FIFO_RST |
552 SD_GCTL_SOFT_RST);
553 allwinner_sdhost_update_irq(s);
554 break;
555 case REG_SD_CKCR: /* Clock Control */
556 s->clock_ctl = value;
557 break;
558 case REG_SD_TMOR: /* Timeout */
559 s->timeout = value;
560 break;
561 case REG_SD_BWDR: /* Bus Width */
562 s->bus_width = value;
563 break;
564 case REG_SD_BKSR: /* Block Size */
565 s->block_size = value;
566 break;
567 case REG_SD_BYCR: /* Byte Count */
568 s->byte_count = value;
569 s->transfer_cnt = value;
570 break;
571 case REG_SD_CMDR: /* Command */
572 s->command = value;
573 if (value & SD_CMDR_LOAD) {
574 allwinner_sdhost_send_command(s);
575 allwinner_sdhost_dma(s);
576 allwinner_sdhost_auto_stop(s);
577 }
578 allwinner_sdhost_update_irq(s);
579 break;
580 case REG_SD_CAGR: /* Command Argument */
581 s->command_arg = value;
582 break;
583 case REG_SD_RESP0: /* Response Zero */
584 s->response[0] = value;
585 break;
586 case REG_SD_RESP1: /* Response One */
587 s->response[1] = value;
588 break;
589 case REG_SD_RESP2: /* Response Two */
590 s->response[2] = value;
591 break;
592 case REG_SD_RESP3: /* Response Three */
593 s->response[3] = value;
594 break;
595 case REG_SD_IMKR: /* Interrupt Mask */
596 s->irq_mask = value;
597 allwinner_sdhost_update_irq(s);
598 break;
599 case REG_SD_MISR: /* Masked Interrupt Status */
600 case REG_SD_RISR: /* Raw Interrupt Status */
601 s->irq_status &= ~value;
602 allwinner_sdhost_update_irq(s);
603 break;
604 case REG_SD_STAR: /* Status */
605 s->status &= ~value;
606 allwinner_sdhost_update_irq(s);
607 break;
608 case REG_SD_FWLR: /* FIFO Water Level */
609 s->fifo_wlevel = value;
610 break;
611 case REG_SD_FUNS: /* FIFO Function Select */
612 s->fifo_func_sel = value;
613 break;
614 case REG_SD_DBGC: /* Debug Enable */
615 s->debug_enable = value;
616 break;
617 case REG_SD_A12A: /* Auto command 12 argument */
618 s->auto12_arg = value;
619 break;
620 case REG_SD_NTSR: /* SD NewTiming Set */
621 s->newtiming_set = value;
622 break;
623 case REG_SD_SDBG: /* SD newTiming Set Debug */
624 s->newtiming_debug = value;
625 break;
626 case REG_SD_HWRST: /* Hardware Reset Register */
627 s->hardware_rst = value;
628 break;
629 case REG_SD_DMAC: /* Internal DMA Controller Control */
630 s->dmac = value;
631 allwinner_sdhost_update_irq(s);
632 break;
633 case REG_SD_DLBA: /* Descriptor List Base Address */
634 s->desc_base = value;
635 break;
636 case REG_SD_IDST: /* Internal DMA Controller Status */
637 s->dmac_status &= (~SD_IDST_WR_MASK) | (~value & SD_IDST_WR_MASK);
638 allwinner_sdhost_update_irq(s);
639 break;
640 case REG_SD_IDIE: /* Internal DMA Controller Interrupt Enable */
641 s->dmac_irq = value;
642 allwinner_sdhost_update_irq(s);
643 break;
644 case REG_SD_THLDC: /* Card Threshold Control */
645 s->card_threshold = value;
646 break;
647 case REG_SD_DSBD: /* eMMC DDR Start Bit Detection Control */
648 s->startbit_detect = value;
649 break;
650 case REG_SD_FIFO: /* Read/Write FIFO */
651 u32 = cpu_to_le32(value);
652 sdbus_write_data(&s->sdbus, &u32, sizeof(u32));
653 allwinner_sdhost_update_transfer_cnt(s, sizeof(u32));
654 allwinner_sdhost_auto_stop(s);
655 allwinner_sdhost_update_irq(s);
656 break;
657 case REG_SD_RES_CRC: /* Response CRC from card/eMMC */
658 case REG_SD_DATA7_CRC: /* CRC Data 7 from card/eMMC */
659 case REG_SD_DATA6_CRC: /* CRC Data 6 from card/eMMC */
660 case REG_SD_DATA5_CRC: /* CRC Data 5 from card/eMMC */
661 case REG_SD_DATA4_CRC: /* CRC Data 4 from card/eMMC */
662 case REG_SD_DATA3_CRC: /* CRC Data 3 from card/eMMC */
663 case REG_SD_DATA2_CRC: /* CRC Data 2 from card/eMMC */
664 case REG_SD_DATA1_CRC: /* CRC Data 1 from card/eMMC */
665 case REG_SD_DATA0_CRC: /* CRC Data 0 from card/eMMC */
666 case REG_SD_CRC_STA: /* CRC status from card/eMMC in write operation */
667 break;
668 default:
669 qemu_log_mask(LOG_GUEST_ERROR, "%s: out-of-bounds offset %"
670 HWADDR_PRIx"\n", __func__, offset);
671 break;
672 }
673 }
674
675 static const MemoryRegionOps allwinner_sdhost_ops = {
676 .read = allwinner_sdhost_read,
677 .write = allwinner_sdhost_write,
678 .endianness = DEVICE_NATIVE_ENDIAN,
679 .valid = {
680 .min_access_size = 4,
681 .max_access_size = 4,
682 },
683 .impl.min_access_size = 4,
684 };
685
686 static const VMStateDescription vmstate_allwinner_sdhost = {
687 .name = "allwinner-sdhost",
688 .version_id = 1,
689 .minimum_version_id = 1,
690 .fields = (VMStateField[]) {
691 VMSTATE_UINT32(global_ctl, AwSdHostState),
692 VMSTATE_UINT32(clock_ctl, AwSdHostState),
693 VMSTATE_UINT32(timeout, AwSdHostState),
694 VMSTATE_UINT32(bus_width, AwSdHostState),
695 VMSTATE_UINT32(block_size, AwSdHostState),
696 VMSTATE_UINT32(byte_count, AwSdHostState),
697 VMSTATE_UINT32(transfer_cnt, AwSdHostState),
698 VMSTATE_UINT32(command, AwSdHostState),
699 VMSTATE_UINT32(command_arg, AwSdHostState),
700 VMSTATE_UINT32_ARRAY(response, AwSdHostState, 4),
701 VMSTATE_UINT32(irq_mask, AwSdHostState),
702 VMSTATE_UINT32(irq_status, AwSdHostState),
703 VMSTATE_UINT32(status, AwSdHostState),
704 VMSTATE_UINT32(fifo_wlevel, AwSdHostState),
705 VMSTATE_UINT32(fifo_func_sel, AwSdHostState),
706 VMSTATE_UINT32(debug_enable, AwSdHostState),
707 VMSTATE_UINT32(auto12_arg, AwSdHostState),
708 VMSTATE_UINT32(newtiming_set, AwSdHostState),
709 VMSTATE_UINT32(newtiming_debug, AwSdHostState),
710 VMSTATE_UINT32(hardware_rst, AwSdHostState),
711 VMSTATE_UINT32(dmac, AwSdHostState),
712 VMSTATE_UINT32(desc_base, AwSdHostState),
713 VMSTATE_UINT32(dmac_status, AwSdHostState),
714 VMSTATE_UINT32(dmac_irq, AwSdHostState),
715 VMSTATE_UINT32(card_threshold, AwSdHostState),
716 VMSTATE_UINT32(startbit_detect, AwSdHostState),
717 VMSTATE_UINT32(response_crc, AwSdHostState),
718 VMSTATE_UINT32_ARRAY(data_crc, AwSdHostState, 8),
719 VMSTATE_UINT32(status_crc, AwSdHostState),
720 VMSTATE_END_OF_LIST()
721 }
722 };
723
724 static void allwinner_sdhost_init(Object *obj)
725 {
726 AwSdHostState *s = AW_SDHOST(obj);
727
728 qbus_create_inplace(&s->sdbus, sizeof(s->sdbus),
729 TYPE_AW_SDHOST_BUS, DEVICE(s), "sd-bus");
730
731 memory_region_init_io(&s->iomem, obj, &allwinner_sdhost_ops, s,
732 TYPE_AW_SDHOST, 4 * KiB);
733 sysbus_init_mmio(SYS_BUS_DEVICE(s), &s->iomem);
734 sysbus_init_irq(SYS_BUS_DEVICE(s), &s->irq);
735 }
736
737 static void allwinner_sdhost_reset(DeviceState *dev)
738 {
739 AwSdHostState *s = AW_SDHOST(dev);
740
741 s->global_ctl = REG_SD_GCTL_RST;
742 s->clock_ctl = REG_SD_CKCR_RST;
743 s->timeout = REG_SD_TMOR_RST;
744 s->bus_width = REG_SD_BWDR_RST;
745 s->block_size = REG_SD_BKSR_RST;
746 s->byte_count = REG_SD_BYCR_RST;
747 s->transfer_cnt = 0;
748
749 s->command = REG_SD_CMDR_RST;
750 s->command_arg = REG_SD_CAGR_RST;
751
752 for (int i = 0; i < ARRAY_SIZE(s->response); i++) {
753 s->response[i] = REG_SD_RESP_RST;
754 }
755
756 s->irq_mask = REG_SD_IMKR_RST;
757 s->irq_status = REG_SD_RISR_RST;
758 s->status = REG_SD_STAR_RST;
759
760 s->fifo_wlevel = REG_SD_FWLR_RST;
761 s->fifo_func_sel = REG_SD_FUNS_RST;
762 s->debug_enable = REG_SD_DBGC_RST;
763 s->auto12_arg = REG_SD_A12A_RST;
764 s->newtiming_set = REG_SD_NTSR_RST;
765 s->newtiming_debug = REG_SD_SDBG_RST;
766 s->hardware_rst = REG_SD_HWRST_RST;
767 s->dmac = REG_SD_DMAC_RST;
768 s->desc_base = REG_SD_DLBA_RST;
769 s->dmac_status = REG_SD_IDST_RST;
770 s->dmac_irq = REG_SD_IDIE_RST;
771 s->card_threshold = REG_SD_THLDC_RST;
772 s->startbit_detect = REG_SD_DSBD_RST;
773 s->response_crc = REG_SD_RES_CRC_RST;
774
775 for (int i = 0; i < ARRAY_SIZE(s->data_crc); i++) {
776 s->data_crc[i] = REG_SD_DATA_CRC_RST;
777 }
778
779 s->status_crc = REG_SD_CRC_STA_RST;
780 }
781
782 static void allwinner_sdhost_bus_class_init(ObjectClass *klass, void *data)
783 {
784 SDBusClass *sbc = SD_BUS_CLASS(klass);
785
786 sbc->set_inserted = allwinner_sdhost_set_inserted;
787 }
788
789 static void allwinner_sdhost_class_init(ObjectClass *klass, void *data)
790 {
791 DeviceClass *dc = DEVICE_CLASS(klass);
792
793 dc->reset = allwinner_sdhost_reset;
794 dc->vmsd = &vmstate_allwinner_sdhost;
795 }
796
797 static void allwinner_sdhost_sun4i_class_init(ObjectClass *klass, void *data)
798 {
799 AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
800 sc->max_desc_size = 8 * KiB;
801 }
802
803 static void allwinner_sdhost_sun5i_class_init(ObjectClass *klass, void *data)
804 {
805 AwSdHostClass *sc = AW_SDHOST_CLASS(klass);
806 sc->max_desc_size = 64 * KiB;
807 }
808
809 static TypeInfo allwinner_sdhost_info = {
810 .name = TYPE_AW_SDHOST,
811 .parent = TYPE_SYS_BUS_DEVICE,
812 .instance_init = allwinner_sdhost_init,
813 .instance_size = sizeof(AwSdHostState),
814 .class_init = allwinner_sdhost_class_init,
815 .class_size = sizeof(AwSdHostClass),
816 .abstract = true,
817 };
818
819 static const TypeInfo allwinner_sdhost_sun4i_info = {
820 .name = TYPE_AW_SDHOST_SUN4I,
821 .parent = TYPE_AW_SDHOST,
822 .class_init = allwinner_sdhost_sun4i_class_init,
823 };
824
825 static const TypeInfo allwinner_sdhost_sun5i_info = {
826 .name = TYPE_AW_SDHOST_SUN5I,
827 .parent = TYPE_AW_SDHOST,
828 .class_init = allwinner_sdhost_sun5i_class_init,
829 };
830
831 static const TypeInfo allwinner_sdhost_bus_info = {
832 .name = TYPE_AW_SDHOST_BUS,
833 .parent = TYPE_SD_BUS,
834 .instance_size = sizeof(SDBus),
835 .class_init = allwinner_sdhost_bus_class_init,
836 };
837
838 static void allwinner_sdhost_register_types(void)
839 {
840 type_register_static(&allwinner_sdhost_info);
841 type_register_static(&allwinner_sdhost_sun4i_info);
842 type_register_static(&allwinner_sdhost_sun5i_info);
843 type_register_static(&allwinner_sdhost_bus_info);
844 }
845
846 type_init(allwinner_sdhost_register_types)
AR7 emulation for QEMU