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target-arm/neon_helper: Remove obsolete FIXME comment
[qemu/pbrook.git] / hw / sd.c
blob297580aabefdb014a1a4590a5f8d326148ba2391
1 /*
2 * SD Memory Card emulation as defined in the "SD Memory Card Physical
3 * layer specification, Version 1.10."
4 *
5 * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org>
6 * Copyright (c) 2007 CodeSourcery
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS''
20 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
21 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
22 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
27 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include "hw.h"
33 #include "block.h"
34 #include "sd.h"
35 #include "bitmap.h"
36
37 //#define DEBUG_SD 1
38
39 #ifdef DEBUG_SD
40 #define DPRINTF(fmt, ...) \
41 do { fprintf(stderr, "SD: " fmt , ## __VA_ARGS__); } while (0)
42 #else
43 #define DPRINTF(fmt, ...) do {} while(0)
44 #endif
45
46 typedef enum {
47 sd_r0 = 0, /* no response */
48 sd_r1, /* normal response command */
49 sd_r2_i, /* CID register */
50 sd_r2_s, /* CSD register */
51 sd_r3, /* OCR register */
52 sd_r6 = 6, /* Published RCA response */
53 sd_r7, /* Operating voltage */
54 sd_r1b = -1,
55 sd_illegal = -2,
56 } sd_rsp_type_t;
57
58 struct SDState {
59 enum {
60 sd_inactive,
61 sd_card_identification_mode,
62 sd_data_transfer_mode,
63 } mode;
64 enum {
65 sd_inactive_state = -1,
66 sd_idle_state = 0,
67 sd_ready_state,
68 sd_identification_state,
69 sd_standby_state,
70 sd_transfer_state,
71 sd_sendingdata_state,
72 sd_receivingdata_state,
73 sd_programming_state,
74 sd_disconnect_state,
75 } state;
76 uint32_t ocr;
77 uint8_t scr[8];
78 uint8_t cid[16];
79 uint8_t csd[16];
80 uint16_t rca;
81 uint32_t card_status;
82 uint8_t sd_status[64];
83 uint32_t vhs;
84 bool wp_switch;
85 unsigned long *wp_groups;
86 uint64_t size;
87 int blk_len;
88 uint32_t erase_start;
89 uint32_t erase_end;
90 uint8_t pwd[16];
91 int pwd_len;
92 int function_group[6];
93
94 bool spi;
95 int current_cmd;
96 /* True if we will handle the next command as an ACMD. Note that this does
97 * *not* track the APP_CMD status bit!
98 */
99 bool expecting_acmd;
100 int blk_written;
101 uint64_t data_start;
102 uint32_t data_offset;
103 uint8_t data[512];
104 qemu_irq readonly_cb;
105 qemu_irq inserted_cb;
106 BlockDriverState *bdrv;
107 uint8_t *buf;
108
109 bool enable;
110 };
111
112 static void sd_set_mode(SDState *sd)
113 {
114 switch (sd->state) {
115 case sd_inactive_state:
116 sd->mode = sd_inactive;
117 break;
118
119 case sd_idle_state:
120 case sd_ready_state:
121 case sd_identification_state:
122 sd->mode = sd_card_identification_mode;
123 break;
124
125 case sd_standby_state:
126 case sd_transfer_state:
127 case sd_sendingdata_state:
128 case sd_receivingdata_state:
129 case sd_programming_state:
130 case sd_disconnect_state:
131 sd->mode = sd_data_transfer_mode;
132 break;
133 }
134 }
135
136 static const sd_cmd_type_t sd_cmd_type[64] = {
137 sd_bc, sd_none, sd_bcr, sd_bcr, sd_none, sd_none, sd_none, sd_ac,
138 sd_bcr, sd_ac, sd_ac, sd_adtc, sd_ac, sd_ac, sd_none, sd_ac,
139 sd_ac, sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none,
140 sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac, sd_ac, sd_adtc, sd_none,
141 sd_ac, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none,
142 sd_none, sd_none, sd_bc, sd_none, sd_none, sd_none, sd_none, sd_none,
143 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac,
144 sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
145 };
146
147 static const sd_cmd_type_t sd_acmd_type[64] = {
148 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none,
149 sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none,
150 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_ac,
151 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
152 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
153 sd_none, sd_bcr, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_none,
154 sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none, sd_none, sd_none,
155 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
156 };
157
158 static const int sd_cmd_class[64] = {
159 0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 1, 0, 0, 0, 0,
160 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 6, 6, 6, 6,
161 5, 5, 10, 10, 10, 10, 5, 9, 9, 9, 7, 7, 7, 7, 7, 7,
162 7, 7, 10, 7, 9, 9, 9, 8, 8, 10, 8, 8, 8, 8, 8, 8,
163 };
164
165 static uint8_t sd_crc7(void *message, size_t width)
166 {
167 int i, bit;
168 uint8_t shift_reg = 0x00;
169 uint8_t *msg = (uint8_t *) message;
170
171 for (i = 0; i < width; i ++, msg ++)
172 for (bit = 7; bit >= 0; bit --) {
173 shift_reg <<= 1;
174 if ((shift_reg >> 7) ^ ((*msg >> bit) & 1))
175 shift_reg ^= 0x89;
176 }
177
178 return shift_reg;
179 }
180
181 static uint16_t sd_crc16(void *message, size_t width)
182 {
183 int i, bit;
184 uint16_t shift_reg = 0x0000;
185 uint16_t *msg = (uint16_t *) message;
186 width <<= 1;
187
188 for (i = 0; i < width; i ++, msg ++)
189 for (bit = 15; bit >= 0; bit --) {
190 shift_reg <<= 1;
191 if ((shift_reg >> 15) ^ ((*msg >> bit) & 1))
192 shift_reg ^= 0x1011;
193 }
194
195 return shift_reg;
196 }
197
198 static void sd_set_ocr(SDState *sd)
199 {
200 /* All voltages OK, card power-up OK, Standard Capacity SD Memory Card */
201 sd->ocr = 0x80ffff00;
202 }
203
204 static void sd_set_scr(SDState *sd)
205 {
206 sd->scr[0] = 0x00; /* SCR Structure */
207 sd->scr[1] = 0x2f; /* SD Security Support */
208 sd->scr[2] = 0x00;
209 sd->scr[3] = 0x00;
210 sd->scr[4] = 0x00;
211 sd->scr[5] = 0x00;
212 sd->scr[6] = 0x00;
213 sd->scr[7] = 0x00;
214 }
215
216 #define MID 0xaa
217 #define OID "XY"
218 #define PNM "QEMU!"
219 #define PRV 0x01
220 #define MDT_YR 2006
221 #define MDT_MON 2
222
223 static void sd_set_cid(SDState *sd)
224 {
225 sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */
226 sd->cid[1] = OID[0]; /* OEM/Application ID (OID) */
227 sd->cid[2] = OID[1];
228 sd->cid[3] = PNM[0]; /* Fake product name (PNM) */
229 sd->cid[4] = PNM[1];
230 sd->cid[5] = PNM[2];
231 sd->cid[6] = PNM[3];
232 sd->cid[7] = PNM[4];
233 sd->cid[8] = PRV; /* Fake product revision (PRV) */
234 sd->cid[9] = 0xde; /* Fake serial number (PSN) */
235 sd->cid[10] = 0xad;
236 sd->cid[11] = 0xbe;
237 sd->cid[12] = 0xef;
238 sd->cid[13] = 0x00 | /* Manufacture date (MDT) */
239 ((MDT_YR - 2000) / 10);
240 sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON;
241 sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
242 }
243
244 #define HWBLOCK_SHIFT 9 /* 512 bytes */
245 #define SECTOR_SHIFT 5 /* 16 kilobytes */
246 #define WPGROUP_SHIFT 7 /* 2 megs */
247 #define CMULT_SHIFT 9 /* 512 times HWBLOCK_SIZE */
248 #define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))
249
250 static const uint8_t sd_csd_rw_mask[16] = {
251 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
252 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
253 };
254
255 static void sd_set_csd(SDState *sd, uint64_t size)
256 {
257 uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
258 uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
259 uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
260
261 if (size <= 0x40000000) { /* Standard Capacity SD */
262 sd->csd[0] = 0x00; /* CSD structure */
263 sd->csd[1] = 0x26; /* Data read access-time-1 */
264 sd->csd[2] = 0x00; /* Data read access-time-2 */
265 sd->csd[3] = 0x5a; /* Max. data transfer rate */
266 sd->csd[4] = 0x5f; /* Card Command Classes */
267 sd->csd[5] = 0x50 | /* Max. read data block length */
268 HWBLOCK_SHIFT;
269 sd->csd[6] = 0xe0 | /* Partial block for read allowed */
270 ((csize >> 10) & 0x03);
271 sd->csd[7] = 0x00 | /* Device size */
272 ((csize >> 2) & 0xff);
273 sd->csd[8] = 0x3f | /* Max. read current */
274 ((csize << 6) & 0xc0);
275 sd->csd[9] = 0xfc | /* Max. write current */
276 ((CMULT_SHIFT - 2) >> 1);
277 sd->csd[10] = 0x40 | /* Erase sector size */
278 (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
279 sd->csd[11] = 0x00 | /* Write protect group size */
280 ((sectsize << 7) & 0x80) | wpsize;
281 sd->csd[12] = 0x90 | /* Write speed factor */
282 (HWBLOCK_SHIFT >> 2);
283 sd->csd[13] = 0x20 | /* Max. write data block length */
284 ((HWBLOCK_SHIFT << 6) & 0xc0);
285 sd->csd[14] = 0x00; /* File format group */
286 sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
287 } else { /* SDHC */
288 size /= 512 * 1024;
289 size -= 1;
290 sd->csd[0] = 0x40;
291 sd->csd[1] = 0x0e;
292 sd->csd[2] = 0x00;
293 sd->csd[3] = 0x32;
294 sd->csd[4] = 0x5b;
295 sd->csd[5] = 0x59;
296 sd->csd[6] = 0x00;
297 sd->csd[7] = (size >> 16) & 0xff;
298 sd->csd[8] = (size >> 8) & 0xff;
299 sd->csd[9] = (size & 0xff);
300 sd->csd[10] = 0x7f;
301 sd->csd[11] = 0x80;
302 sd->csd[12] = 0x0a;
303 sd->csd[13] = 0x40;
304 sd->csd[14] = 0x00;
305 sd->csd[15] = 0x00;
306 sd->ocr |= 1 << 30; /* High Capacity SD Memort Card */
307 }
308 }
309
310 static void sd_set_rca(SDState *sd)
311 {
312 sd->rca += 0x4567;
313 }
314
315 /* Card status bits, split by clear condition:
316 * A : According to the card current state
317 * B : Always related to the previous command
318 * C : Cleared by read
319 */
320 #define CARD_STATUS_A 0x02004100
321 #define CARD_STATUS_B 0x00c01e00
322 #define CARD_STATUS_C 0xfd39a028
323
324 static void sd_set_cardstatus(SDState *sd)
325 {
326 sd->card_status = 0x00000100;
327 }
328
329 static void sd_set_sdstatus(SDState *sd)
330 {
331 memset(sd->sd_status, 0, 64);
332 }
333
334 static int sd_req_crc_validate(SDRequest *req)
335 {
336 uint8_t buffer[5];
337 buffer[0] = 0x40 | req->cmd;
338 buffer[1] = (req->arg >> 24) & 0xff;
339 buffer[2] = (req->arg >> 16) & 0xff;
340 buffer[3] = (req->arg >> 8) & 0xff;
341 buffer[4] = (req->arg >> 0) & 0xff;
342 return 0;
343 return sd_crc7(buffer, 5) != req->crc; /* TODO */
344 }
345
346 static void sd_response_r1_make(SDState *sd, uint8_t *response)
347 {
348 uint32_t status = sd->card_status;
349 /* Clear the "clear on read" status bits */
350 sd->card_status &= ~CARD_STATUS_C;
351
352 response[0] = (status >> 24) & 0xff;
353 response[1] = (status >> 16) & 0xff;
354 response[2] = (status >> 8) & 0xff;
355 response[3] = (status >> 0) & 0xff;
356 }
357
358 static void sd_response_r3_make(SDState *sd, uint8_t *response)
359 {
360 response[0] = (sd->ocr >> 24) & 0xff;
361 response[1] = (sd->ocr >> 16) & 0xff;
362 response[2] = (sd->ocr >> 8) & 0xff;
363 response[3] = (sd->ocr >> 0) & 0xff;
364 }
365
366 static void sd_response_r6_make(SDState *sd, uint8_t *response)
367 {
368 uint16_t arg;
369 uint16_t status;
370
371 arg = sd->rca;
372 status = ((sd->card_status >> 8) & 0xc000) |
373 ((sd->card_status >> 6) & 0x2000) |
374 (sd->card_status & 0x1fff);
375 sd->card_status &= ~(CARD_STATUS_C & 0xc81fff);
376
377 response[0] = (arg >> 8) & 0xff;
378 response[1] = arg & 0xff;
379 response[2] = (status >> 8) & 0xff;
380 response[3] = status & 0xff;
381 }
382
383 static void sd_response_r7_make(SDState *sd, uint8_t *response)
384 {
385 response[0] = (sd->vhs >> 24) & 0xff;
386 response[1] = (sd->vhs >> 16) & 0xff;
387 response[2] = (sd->vhs >> 8) & 0xff;
388 response[3] = (sd->vhs >> 0) & 0xff;
389 }
390
391 static inline uint64_t sd_addr_to_wpnum(uint64_t addr)
392 {
393 return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
394 }
395
396 static void sd_reset(SDState *sd, BlockDriverState *bdrv)
397 {
398 uint64_t size;
399 uint64_t sect;
400
401 if (bdrv) {
402 bdrv_get_geometry(bdrv, &sect);
403 } else {
404 sect = 0;
405 }
406 size = sect << 9;
407
408 sect = sd_addr_to_wpnum(size) + 1;
409
410 sd->state = sd_idle_state;
411 sd->rca = 0x0000;
412 sd_set_ocr(sd);
413 sd_set_scr(sd);
414 sd_set_cid(sd);
415 sd_set_csd(sd, size);
416 sd_set_cardstatus(sd);
417 sd_set_sdstatus(sd);
418
419 sd->bdrv = bdrv;
420
421 if (sd->wp_groups)
422 g_free(sd->wp_groups);
423 sd->wp_switch = bdrv ? bdrv_is_read_only(bdrv) : false;
424 sd->wp_groups = bitmap_new(sect);
425 memset(sd->function_group, 0, sizeof(int) * 6);
426 sd->erase_start = 0;
427 sd->erase_end = 0;
428 sd->size = size;
429 sd->blk_len = 0x200;
430 sd->pwd_len = 0;
431 sd->expecting_acmd = false;
432 }
433
434 static void sd_cardchange(void *opaque, bool load)
435 {
436 SDState *sd = opaque;
437
438 qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv));
439 if (bdrv_is_inserted(sd->bdrv)) {
440 sd_reset(sd, sd->bdrv);
441 qemu_set_irq(sd->readonly_cb, sd->wp_switch);
442 }
443 }
444
445 static const BlockDevOps sd_block_ops = {
446 .change_media_cb = sd_cardchange,
447 };
448
449 /* We do not model the chip select pin, so allow the board to select
450 whether card should be in SSI or MMC/SD mode. It is also up to the
451 board to ensure that ssi transfers only occur when the chip select
452 is asserted. */
453 SDState *sd_init(BlockDriverState *bs, bool is_spi)
454 {
455 SDState *sd;
456
457 sd = (SDState *) g_malloc0(sizeof(SDState));
458 sd->buf = qemu_blockalign(bs, 512);
459 sd->spi = is_spi;
460 sd->enable = true;
461 sd_reset(sd, bs);
462 if (sd->bdrv) {
463 bdrv_attach_dev_nofail(sd->bdrv, sd);
464 bdrv_set_dev_ops(sd->bdrv, &sd_block_ops, sd);
465 }
466 return sd;
467 }
468
469 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
470 {
471 sd->readonly_cb = readonly;
472 sd->inserted_cb = insert;
473 qemu_set_irq(readonly, sd->bdrv ? bdrv_is_read_only(sd->bdrv) : 0);
474 qemu_set_irq(insert, sd->bdrv ? bdrv_is_inserted(sd->bdrv) : 0);
475 }
476
477 static void sd_erase(SDState *sd)
478 {
479 int i, start, end;
480 if (!sd->erase_start || !sd->erase_end) {
481 sd->card_status |= ERASE_SEQ_ERROR;
482 return;
483 }
484
485 start = sd_addr_to_wpnum(sd->erase_start);
486 end = sd_addr_to_wpnum(sd->erase_end);
487 sd->erase_start = 0;
488 sd->erase_end = 0;
489 sd->csd[14] |= 0x40;
490
491 for (i = start; i <= end; i++) {
492 if (test_bit(i, sd->wp_groups)) {
493 sd->card_status |= WP_ERASE_SKIP;
494 }
495 }
496 }
497
498 static uint32_t sd_wpbits(SDState *sd, uint64_t addr)
499 {
500 uint32_t i, wpnum;
501 uint32_t ret = 0;
502
503 wpnum = sd_addr_to_wpnum(addr);
504
505 for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) {
506 if (addr < sd->size && test_bit(wpnum, sd->wp_groups)) {
507 ret |= (1 << i);
508 }
509 }
510
511 return ret;
512 }
513
514 static void sd_function_switch(SDState *sd, uint32_t arg)
515 {
516 int i, mode, new_func, crc;
517 mode = !!(arg & 0x80000000);
518
519 sd->data[0] = 0x00; /* Maximum current consumption */
520 sd->data[1] = 0x01;
521 sd->data[2] = 0x80; /* Supported group 6 functions */
522 sd->data[3] = 0x01;
523 sd->data[4] = 0x80; /* Supported group 5 functions */
524 sd->data[5] = 0x01;
525 sd->data[6] = 0x80; /* Supported group 4 functions */
526 sd->data[7] = 0x01;
527 sd->data[8] = 0x80; /* Supported group 3 functions */
528 sd->data[9] = 0x01;
529 sd->data[10] = 0x80; /* Supported group 2 functions */
530 sd->data[11] = 0x43;
531 sd->data[12] = 0x80; /* Supported group 1 functions */
532 sd->data[13] = 0x03;
533 for (i = 0; i < 6; i ++) {
534 new_func = (arg >> (i * 4)) & 0x0f;
535 if (mode && new_func != 0x0f)
536 sd->function_group[i] = new_func;
537 sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4);
538 }
539 memset(&sd->data[17], 0, 47);
540 crc = sd_crc16(sd->data, 64);
541 sd->data[65] = crc >> 8;
542 sd->data[66] = crc & 0xff;
543 }
544
545 static inline bool sd_wp_addr(SDState *sd, uint64_t addr)
546 {
547 return test_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
548 }
549
550 static void sd_lock_command(SDState *sd)
551 {
552 int erase, lock, clr_pwd, set_pwd, pwd_len;
553 erase = !!(sd->data[0] & 0x08);
554 lock = sd->data[0] & 0x04;
555 clr_pwd = sd->data[0] & 0x02;
556 set_pwd = sd->data[0] & 0x01;
557
558 if (sd->blk_len > 1)
559 pwd_len = sd->data[1];
560 else
561 pwd_len = 0;
562
563 if (erase) {
564 if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 ||
565 set_pwd || clr_pwd || lock || sd->wp_switch ||
566 (sd->csd[14] & 0x20)) {
567 sd->card_status |= LOCK_UNLOCK_FAILED;
568 return;
569 }
570 bitmap_zero(sd->wp_groups, sd_addr_to_wpnum(sd->size) + 1);
571 sd->csd[14] &= ~0x10;
572 sd->card_status &= ~CARD_IS_LOCKED;
573 sd->pwd_len = 0;
574 /* Erasing the entire card here! */
575 fprintf(stderr, "SD: Card force-erased by CMD42\n");
576 return;
577 }
578
579 if (sd->blk_len < 2 + pwd_len ||
580 pwd_len <= sd->pwd_len ||
581 pwd_len > sd->pwd_len + 16) {
582 sd->card_status |= LOCK_UNLOCK_FAILED;
583 return;
584 }
585
586 if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) {
587 sd->card_status |= LOCK_UNLOCK_FAILED;
588 return;
589 }
590
591 pwd_len -= sd->pwd_len;
592 if ((pwd_len && !set_pwd) ||
593 (clr_pwd && (set_pwd || lock)) ||
594 (lock && !sd->pwd_len && !set_pwd) ||
595 (!set_pwd && !clr_pwd &&
596 (((sd->card_status & CARD_IS_LOCKED) && lock) ||
597 (!(sd->card_status & CARD_IS_LOCKED) && !lock)))) {
598 sd->card_status |= LOCK_UNLOCK_FAILED;
599 return;
600 }
601
602 if (set_pwd) {
603 memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
604 sd->pwd_len = pwd_len;
605 }
606
607 if (clr_pwd) {
608 sd->pwd_len = 0;
609 }
610
611 if (lock)
612 sd->card_status |= CARD_IS_LOCKED;
613 else
614 sd->card_status &= ~CARD_IS_LOCKED;
615 }
616
617 static sd_rsp_type_t sd_normal_command(SDState *sd,
618 SDRequest req)
619 {
620 uint32_t rca = 0x0000;
621 uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg;
622
623 /* Not interpreting this as an app command */
624 sd->card_status &= ~APP_CMD;
625
626 if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
627 rca = req.arg >> 16;
628
629 DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
630 switch (req.cmd) {
631 /* Basic commands (Class 0 and Class 1) */
632 case 0: /* CMD0: GO_IDLE_STATE */
633 switch (sd->state) {
634 case sd_inactive_state:
635 return sd->spi ? sd_r1 : sd_r0;
636
637 default:
638 sd->state = sd_idle_state;
639 sd_reset(sd, sd->bdrv);
640 return sd->spi ? sd_r1 : sd_r0;
641 }
642 break;
643
644 case 1: /* CMD1: SEND_OP_CMD */
645 if (!sd->spi)
646 goto bad_cmd;
647
648 sd->state = sd_transfer_state;
649 return sd_r1;
650
651 case 2: /* CMD2: ALL_SEND_CID */
652 if (sd->spi)
653 goto bad_cmd;
654 switch (sd->state) {
655 case sd_ready_state:
656 sd->state = sd_identification_state;
657 return sd_r2_i;
658
659 default:
660 break;
661 }
662 break;
663
664 case 3: /* CMD3: SEND_RELATIVE_ADDR */
665 if (sd->spi)
666 goto bad_cmd;
667 switch (sd->state) {
668 case sd_identification_state:
669 case sd_standby_state:
670 sd->state = sd_standby_state;
671 sd_set_rca(sd);
672 return sd_r6;
673
674 default:
675 break;
676 }
677 break;
678
679 case 4: /* CMD4: SEND_DSR */
680 if (sd->spi)
681 goto bad_cmd;
682 switch (sd->state) {
683 case sd_standby_state:
684 break;
685
686 default:
687 break;
688 }
689 break;
690
691 case 5: /* CMD5: reserved for SDIO cards */
692 return sd_illegal;
693
694 case 6: /* CMD6: SWITCH_FUNCTION */
695 if (sd->spi)
696 goto bad_cmd;
697 switch (sd->mode) {
698 case sd_data_transfer_mode:
699 sd_function_switch(sd, req.arg);
700 sd->state = sd_sendingdata_state;
701 sd->data_start = 0;
702 sd->data_offset = 0;
703 return sd_r1;
704
705 default:
706 break;
707 }
708 break;
709
710 case 7: /* CMD7: SELECT/DESELECT_CARD */
711 if (sd->spi)
712 goto bad_cmd;
713 switch (sd->state) {
714 case sd_standby_state:
715 if (sd->rca != rca)
716 return sd_r0;
717
718 sd->state = sd_transfer_state;
719 return sd_r1b;
720
721 case sd_transfer_state:
722 case sd_sendingdata_state:
723 if (sd->rca == rca)
724 break;
725
726 sd->state = sd_standby_state;
727 return sd_r1b;
728
729 case sd_disconnect_state:
730 if (sd->rca != rca)
731 return sd_r0;
732
733 sd->state = sd_programming_state;
734 return sd_r1b;
735
736 case sd_programming_state:
737 if (sd->rca == rca)
738 break;
739
740 sd->state = sd_disconnect_state;
741 return sd_r1b;
742
743 default:
744 break;
745 }
746 break;
747
748 case 8: /* CMD8: SEND_IF_COND */
749 /* Physical Layer Specification Version 2.00 command */
750 switch (sd->state) {
751 case sd_idle_state:
752 sd->vhs = 0;
753
754 /* No response if not exactly one VHS bit is set. */
755 if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff)))
756 return sd->spi ? sd_r7 : sd_r0;
757
758 /* Accept. */
759 sd->vhs = req.arg;
760 return sd_r7;
761
762 default:
763 break;
764 }
765 break;
766
767 case 9: /* CMD9: SEND_CSD */
768 switch (sd->state) {
769 case sd_standby_state:
770 if (sd->rca != rca)
771 return sd_r0;
772
773 return sd_r2_s;
774
775 case sd_transfer_state:
776 if (!sd->spi)
777 break;
778 sd->state = sd_sendingdata_state;
779 memcpy(sd->data, sd->csd, 16);
780 sd->data_start = addr;
781 sd->data_offset = 0;
782 return sd_r1;
783
784 default:
785 break;
786 }
787 break;
788
789 case 10: /* CMD10: SEND_CID */
790 switch (sd->state) {
791 case sd_standby_state:
792 if (sd->rca != rca)
793 return sd_r0;
794
795 return sd_r2_i;
796
797 case sd_transfer_state:
798 if (!sd->spi)
799 break;
800 sd->state = sd_sendingdata_state;
801 memcpy(sd->data, sd->cid, 16);
802 sd->data_start = addr;
803 sd->data_offset = 0;
804 return sd_r1;
805
806 default:
807 break;
808 }
809 break;
810
811 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
812 if (sd->spi)
813 goto bad_cmd;
814 switch (sd->state) {
815 case sd_transfer_state:
816 sd->state = sd_sendingdata_state;
817 sd->data_start = req.arg;
818 sd->data_offset = 0;
819
820 if (sd->data_start + sd->blk_len > sd->size)
821 sd->card_status |= ADDRESS_ERROR;
822 return sd_r0;
823
824 default:
825 break;
826 }
827 break;
828
829 case 12: /* CMD12: STOP_TRANSMISSION */
830 switch (sd->state) {
831 case sd_sendingdata_state:
832 sd->state = sd_transfer_state;
833 return sd_r1b;
834
835 case sd_receivingdata_state:
836 sd->state = sd_programming_state;
837 /* Bzzzzzzztt .... Operation complete. */
838 sd->state = sd_transfer_state;
839 return sd_r1b;
840
841 default:
842 break;
843 }
844 break;
845
846 case 13: /* CMD13: SEND_STATUS */
847 switch (sd->mode) {
848 case sd_data_transfer_mode:
849 if (sd->rca != rca)
850 return sd_r0;
851
852 return sd_r1;
853
854 default:
855 break;
856 }
857 break;
858
859 case 15: /* CMD15: GO_INACTIVE_STATE */
860 if (sd->spi)
861 goto bad_cmd;
862 switch (sd->mode) {
863 case sd_data_transfer_mode:
864 if (sd->rca != rca)
865 return sd_r0;
866
867 sd->state = sd_inactive_state;
868 return sd_r0;
869
870 default:
871 break;
872 }
873 break;
874
875 /* Block read commands (Classs 2) */
876 case 16: /* CMD16: SET_BLOCKLEN */
877 switch (sd->state) {
878 case sd_transfer_state:
879 if (req.arg > (1 << HWBLOCK_SHIFT))
880 sd->card_status |= BLOCK_LEN_ERROR;
881 else
882 sd->blk_len = req.arg;
883
884 return sd_r1;
885
886 default:
887 break;
888 }
889 break;
890
891 case 17: /* CMD17: READ_SINGLE_BLOCK */
892 switch (sd->state) {
893 case sd_transfer_state:
894 sd->state = sd_sendingdata_state;
895 sd->data_start = addr;
896 sd->data_offset = 0;
897
898 if (sd->data_start + sd->blk_len > sd->size)
899 sd->card_status |= ADDRESS_ERROR;
900 return sd_r1;
901
902 default:
903 break;
904 }
905 break;
906
907 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
908 switch (sd->state) {
909 case sd_transfer_state:
910 sd->state = sd_sendingdata_state;
911 sd->data_start = addr;
912 sd->data_offset = 0;
913
914 if (sd->data_start + sd->blk_len > sd->size)
915 sd->card_status |= ADDRESS_ERROR;
916 return sd_r1;
917
918 default:
919 break;
920 }
921 break;
922
923 /* Block write commands (Class 4) */
924 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
925 if (sd->spi)
926 goto unimplemented_cmd;
927 switch (sd->state) {
928 case sd_transfer_state:
929 /* Writing in SPI mode not implemented. */
930 if (sd->spi)
931 break;
932 sd->state = sd_receivingdata_state;
933 sd->data_start = addr;
934 sd->data_offset = 0;
935 sd->blk_written = 0;
936
937 if (sd->data_start + sd->blk_len > sd->size)
938 sd->card_status |= ADDRESS_ERROR;
939 if (sd_wp_addr(sd, sd->data_start))
940 sd->card_status |= WP_VIOLATION;
941 if (sd->csd[14] & 0x30)
942 sd->card_status |= WP_VIOLATION;
943 return sd_r1;
944
945 default:
946 break;
947 }
948 break;
949
950 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
951 if (sd->spi)
952 goto unimplemented_cmd;
953 switch (sd->state) {
954 case sd_transfer_state:
955 /* Writing in SPI mode not implemented. */
956 if (sd->spi)
957 break;
958 sd->state = sd_receivingdata_state;
959 sd->data_start = addr;
960 sd->data_offset = 0;
961 sd->blk_written = 0;
962
963 if (sd->data_start + sd->blk_len > sd->size)
964 sd->card_status |= ADDRESS_ERROR;
965 if (sd_wp_addr(sd, sd->data_start))
966 sd->card_status |= WP_VIOLATION;
967 if (sd->csd[14] & 0x30)
968 sd->card_status |= WP_VIOLATION;
969 return sd_r1;
970
971 default:
972 break;
973 }
974 break;
975
976 case 26: /* CMD26: PROGRAM_CID */
977 if (sd->spi)
978 goto bad_cmd;
979 switch (sd->state) {
980 case sd_transfer_state:
981 sd->state = sd_receivingdata_state;
982 sd->data_start = 0;
983 sd->data_offset = 0;
984 return sd_r1;
985
986 default:
987 break;
988 }
989 break;
990
991 case 27: /* CMD27: PROGRAM_CSD */
992 if (sd->spi)
993 goto unimplemented_cmd;
994 switch (sd->state) {
995 case sd_transfer_state:
996 sd->state = sd_receivingdata_state;
997 sd->data_start = 0;
998 sd->data_offset = 0;
999 return sd_r1;
1000
1001 default:
1002 break;
1003 }
1004 break;
1005
1006 /* Write protection (Class 6) */
1007 case 28: /* CMD28: SET_WRITE_PROT */
1008 switch (sd->state) {
1009 case sd_transfer_state:
1010 if (addr >= sd->size) {
1011 sd->card_status |= ADDRESS_ERROR;
1012 return sd_r1b;
1013 }
1014
1015 sd->state = sd_programming_state;
1016 set_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
1017 /* Bzzzzzzztt .... Operation complete. */
1018 sd->state = sd_transfer_state;
1019 return sd_r1b;
1020
1021 default:
1022 break;
1023 }
1024 break;
1025
1026 case 29: /* CMD29: CLR_WRITE_PROT */
1027 switch (sd->state) {
1028 case sd_transfer_state:
1029 if (addr >= sd->size) {
1030 sd->card_status |= ADDRESS_ERROR;
1031 return sd_r1b;
1032 }
1033
1034 sd->state = sd_programming_state;
1035 clear_bit(sd_addr_to_wpnum(addr), sd->wp_groups);
1036 /* Bzzzzzzztt .... Operation complete. */
1037 sd->state = sd_transfer_state;
1038 return sd_r1b;
1039
1040 default:
1041 break;
1042 }
1043 break;
1044
1045 case 30: /* CMD30: SEND_WRITE_PROT */
1046 switch (sd->state) {
1047 case sd_transfer_state:
1048 sd->state = sd_sendingdata_state;
1049 *(uint32_t *) sd->data = sd_wpbits(sd, req.arg);
1050 sd->data_start = addr;
1051 sd->data_offset = 0;
1052 return sd_r1b;
1053
1054 default:
1055 break;
1056 }
1057 break;
1058
1059 /* Erase commands (Class 5) */
1060 case 32: /* CMD32: ERASE_WR_BLK_START */
1061 switch (sd->state) {
1062 case sd_transfer_state:
1063 sd->erase_start = req.arg;
1064 return sd_r1;
1065
1066 default:
1067 break;
1068 }
1069 break;
1070
1071 case 33: /* CMD33: ERASE_WR_BLK_END */
1072 switch (sd->state) {
1073 case sd_transfer_state:
1074 sd->erase_end = req.arg;
1075 return sd_r1;
1076
1077 default:
1078 break;
1079 }
1080 break;
1081
1082 case 38: /* CMD38: ERASE */
1083 switch (sd->state) {
1084 case sd_transfer_state:
1085 if (sd->csd[14] & 0x30) {
1086 sd->card_status |= WP_VIOLATION;
1087 return sd_r1b;
1088 }
1089
1090 sd->state = sd_programming_state;
1091 sd_erase(sd);
1092 /* Bzzzzzzztt .... Operation complete. */
1093 sd->state = sd_transfer_state;
1094 return sd_r1b;
1095
1096 default:
1097 break;
1098 }
1099 break;
1100
1101 /* Lock card commands (Class 7) */
1102 case 42: /* CMD42: LOCK_UNLOCK */
1103 if (sd->spi)
1104 goto unimplemented_cmd;
1105 switch (sd->state) {
1106 case sd_transfer_state:
1107 sd->state = sd_receivingdata_state;
1108 sd->data_start = 0;
1109 sd->data_offset = 0;
1110 return sd_r1;
1111
1112 default:
1113 break;
1114 }
1115 break;
1116
1117 case 52:
1118 case 53:
1119 /* CMD52, CMD53: reserved for SDIO cards
1120 * (see the SDIO Simplified Specification V2.0)
1121 * Handle as illegal command but do not complain
1122 * on stderr, as some OSes may use these in their
1123 * probing for presence of an SDIO card.
1124 */
1125 return sd_illegal;
1126
1127 /* Application specific commands (Class 8) */
1128 case 55: /* CMD55: APP_CMD */
1129 if (sd->rca != rca)
1130 return sd_r0;
1131
1132 sd->expecting_acmd = true;
1133 sd->card_status |= APP_CMD;
1134 return sd_r1;
1135
1136 case 56: /* CMD56: GEN_CMD */
1137 fprintf(stderr, "SD: GEN_CMD 0x%08x\n", req.arg);
1138
1139 switch (sd->state) {
1140 case sd_transfer_state:
1141 sd->data_offset = 0;
1142 if (req.arg & 1)
1143 sd->state = sd_sendingdata_state;
1144 else
1145 sd->state = sd_receivingdata_state;
1146 return sd_r1;
1147
1148 default:
1149 break;
1150 }
1151 break;
1152
1153 default:
1154 bad_cmd:
1155 fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
1156 return sd_illegal;
1157
1158 unimplemented_cmd:
1159 /* Commands that are recognised but not yet implemented in SPI mode. */
1160 fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
1161 return sd_illegal;
1162 }
1163
1164 fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
1165 return sd_illegal;
1166 }
1167
1168 static sd_rsp_type_t sd_app_command(SDState *sd,
1169 SDRequest req)
1170 {
1171 DPRINTF("ACMD%d 0x%08x\n", req.cmd, req.arg);
1172 sd->card_status |= APP_CMD;
1173 switch (req.cmd) {
1174 case 6: /* ACMD6: SET_BUS_WIDTH */
1175 switch (sd->state) {
1176 case sd_transfer_state:
1177 sd->sd_status[0] &= 0x3f;
1178 sd->sd_status[0] |= (req.arg & 0x03) << 6;
1179 return sd_r1;
1180
1181 default:
1182 break;
1183 }
1184 break;
1185
1186 case 13: /* ACMD13: SD_STATUS */
1187 switch (sd->state) {
1188 case sd_transfer_state:
1189 sd->state = sd_sendingdata_state;
1190 sd->data_start = 0;
1191 sd->data_offset = 0;
1192 return sd_r1;
1193
1194 default:
1195 break;
1196 }
1197 break;
1198
1199 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1200 switch (sd->state) {
1201 case sd_transfer_state:
1202 *(uint32_t *) sd->data = sd->blk_written;
1203
1204 sd->state = sd_sendingdata_state;
1205 sd->data_start = 0;
1206 sd->data_offset = 0;
1207 return sd_r1;
1208
1209 default:
1210 break;
1211 }
1212 break;
1213
1214 case 23: /* ACMD23: SET_WR_BLK_ERASE_COUNT */
1215 switch (sd->state) {
1216 case sd_transfer_state:
1217 return sd_r1;
1218
1219 default:
1220 break;
1221 }
1222 break;
1223
1224 case 41: /* ACMD41: SD_APP_OP_COND */
1225 if (sd->spi) {
1226 /* SEND_OP_CMD */
1227 sd->state = sd_transfer_state;
1228 return sd_r1;
1229 }
1230 switch (sd->state) {
1231 case sd_idle_state:
1232 /* We accept any voltage. 10000 V is nothing. */
1233 if (req.arg)
1234 sd->state = sd_ready_state;
1235
1236 return sd_r3;
1237
1238 default:
1239 break;
1240 }
1241 break;
1242
1243 case 42: /* ACMD42: SET_CLR_CARD_DETECT */
1244 switch (sd->state) {
1245 case sd_transfer_state:
1246 /* Bringing in the 50KOhm pull-up resistor... Done. */
1247 return sd_r1;
1248
1249 default:
1250 break;
1251 }
1252 break;
1253
1254 case 51: /* ACMD51: SEND_SCR */
1255 switch (sd->state) {
1256 case sd_transfer_state:
1257 sd->state = sd_sendingdata_state;
1258 sd->data_start = 0;
1259 sd->data_offset = 0;
1260 return sd_r1;
1261
1262 default:
1263 break;
1264 }
1265 break;
1266
1267 default:
1268 /* Fall back to standard commands. */
1269 return sd_normal_command(sd, req);
1270 }
1271
1272 fprintf(stderr, "SD: ACMD%i in a wrong state\n", req.cmd);
1273 return sd_illegal;
1274 }
1275
1276 static int cmd_valid_while_locked(SDState *sd, SDRequest *req)
1277 {
1278 /* Valid commands in locked state:
1279 * basic class (0)
1280 * lock card class (7)
1281 * CMD16
1282 * implicitly, the ACMD prefix CMD55
1283 * ACMD41 and ACMD42
1284 * Anything else provokes an "illegal command" response.
1285 */
1286 if (sd->expecting_acmd) {
1287 return req->cmd == 41 || req->cmd == 42;
1288 }
1289 if (req->cmd == 16 || req->cmd == 55) {
1290 return 1;
1291 }
1292 return sd_cmd_class[req->cmd] == 0 || sd_cmd_class[req->cmd] == 7;
1293 }
1294
1295 int sd_do_command(SDState *sd, SDRequest *req,
1296 uint8_t *response) {
1297 int last_state;
1298 sd_rsp_type_t rtype;
1299 int rsplen;
1300
1301 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable) {
1302 return 0;
1303 }
1304
1305 if (sd_req_crc_validate(req)) {
1306 sd->card_status |= COM_CRC_ERROR;
1307 rtype = sd_illegal;
1308 goto send_response;
1309 }
1310
1311 if (sd->card_status & CARD_IS_LOCKED) {
1312 if (!cmd_valid_while_locked(sd, req)) {
1313 sd->card_status |= ILLEGAL_COMMAND;
1314 sd->expecting_acmd = false;
1315 fprintf(stderr, "SD: Card is locked\n");
1316 rtype = sd_illegal;
1317 goto send_response;
1318 }
1319 }
1320
1321 last_state = sd->state;
1322 sd_set_mode(sd);
1323
1324 if (sd->expecting_acmd) {
1325 sd->expecting_acmd = false;
1326 rtype = sd_app_command(sd, *req);
1327 } else {
1328 rtype = sd_normal_command(sd, *req);
1329 }
1330
1331 if (rtype == sd_illegal) {
1332 sd->card_status |= ILLEGAL_COMMAND;
1333 } else {
1334 /* Valid command, we can update the 'state before command' bits.
1335 * (Do this now so they appear in r1 responses.)
1336 */
1337 sd->current_cmd = req->cmd;
1338 sd->card_status &= ~CURRENT_STATE;
1339 sd->card_status |= (last_state << 9);
1340 }
1341
1342 send_response:
1343 switch (rtype) {
1344 case sd_r1:
1345 case sd_r1b:
1346 sd_response_r1_make(sd, response);
1347 rsplen = 4;
1348 break;
1349
1350 case sd_r2_i:
1351 memcpy(response, sd->cid, sizeof(sd->cid));
1352 rsplen = 16;
1353 break;
1354
1355 case sd_r2_s:
1356 memcpy(response, sd->csd, sizeof(sd->csd));
1357 rsplen = 16;
1358 break;
1359
1360 case sd_r3:
1361 sd_response_r3_make(sd, response);
1362 rsplen = 4;
1363 break;
1364
1365 case sd_r6:
1366 sd_response_r6_make(sd, response);
1367 rsplen = 4;
1368 break;
1369
1370 case sd_r7:
1371 sd_response_r7_make(sd, response);
1372 rsplen = 4;
1373 break;
1374
1375 case sd_r0:
1376 case sd_illegal:
1377 default:
1378 rsplen = 0;
1379 break;
1380 }
1381
1382 if (rtype != sd_illegal) {
1383 /* Clear the "clear on valid command" status bits now we've
1384 * sent any response
1385 */
1386 sd->card_status &= ~CARD_STATUS_B;
1387 }
1388
1389 #ifdef DEBUG_SD
1390 if (rsplen) {
1391 int i;
1392 DPRINTF("Response:");
1393 for (i = 0; i < rsplen; i++)
1394 printf(" %02x", response[i]);
1395 printf(" state %d\n", sd->state);
1396 } else {
1397 DPRINTF("No response %d\n", sd->state);
1398 }
1399 #endif
1400
1401 return rsplen;
1402 }
1403
1404 static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len)
1405 {
1406 uint64_t end = addr + len;
1407
1408 DPRINTF("sd_blk_read: addr = 0x%08llx, len = %d\n",
1409 (unsigned long long) addr, len);
1410 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
1411 fprintf(stderr, "sd_blk_read: read error on host side\n");
1412 return;
1413 }
1414
1415 if (end > (addr & ~511) + 512) {
1416 memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511));
1417
1418 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
1419 fprintf(stderr, "sd_blk_read: read error on host side\n");
1420 return;
1421 }
1422 memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511);
1423 } else
1424 memcpy(sd->data, sd->buf + (addr & 511), len);
1425 }
1426
1427 static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len)
1428 {
1429 uint64_t end = addr + len;
1430
1431 if ((addr & 511) || len < 512)
1432 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
1433 fprintf(stderr, "sd_blk_write: read error on host side\n");
1434 return;
1435 }
1436
1437 if (end > (addr & ~511) + 512) {
1438 memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511));
1439 if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
1440 fprintf(stderr, "sd_blk_write: write error on host side\n");
1441 return;
1442 }
1443
1444 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
1445 fprintf(stderr, "sd_blk_write: read error on host side\n");
1446 return;
1447 }
1448 memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511);
1449 if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) < 0) {
1450 fprintf(stderr, "sd_blk_write: write error on host side\n");
1451 }
1452 } else {
1453 memcpy(sd->buf + (addr & 511), sd->data, len);
1454 if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) < 0) {
1455 fprintf(stderr, "sd_blk_write: write error on host side\n");
1456 }
1457 }
1458 }
1459
1460 #define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len)
1461 #define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len)
1462 #define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len)
1463 #define APP_WRITE_BLOCK(a, len)
1464
1465 void sd_write_data(SDState *sd, uint8_t value)
1466 {
1467 int i;
1468
1469 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1470 return;
1471
1472 if (sd->state != sd_receivingdata_state) {
1473 fprintf(stderr, "sd_write_data: not in Receiving-Data state\n");
1474 return;
1475 }
1476
1477 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1478 return;
1479
1480 switch (sd->current_cmd) {
1481 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
1482 sd->data[sd->data_offset ++] = value;
1483 if (sd->data_offset >= sd->blk_len) {
1484 /* TODO: Check CRC before committing */
1485 sd->state = sd_programming_state;
1486 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1487 sd->blk_written ++;
1488 sd->csd[14] |= 0x40;
1489 /* Bzzzzzzztt .... Operation complete. */
1490 sd->state = sd_transfer_state;
1491 }
1492 break;
1493
1494 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
1495 if (sd->data_offset == 0) {
1496 /* Start of the block - lets check the address is valid */
1497 if (sd->data_start + sd->blk_len > sd->size) {
1498 sd->card_status |= ADDRESS_ERROR;
1499 break;
1500 }
1501 if (sd_wp_addr(sd, sd->data_start)) {
1502 sd->card_status |= WP_VIOLATION;
1503 break;
1504 }
1505 }
1506 sd->data[sd->data_offset++] = value;
1507 if (sd->data_offset >= sd->blk_len) {
1508 /* TODO: Check CRC before committing */
1509 sd->state = sd_programming_state;
1510 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1511 sd->blk_written++;
1512 sd->data_start += sd->blk_len;
1513 sd->data_offset = 0;
1514 sd->csd[14] |= 0x40;
1515
1516 /* Bzzzzzzztt .... Operation complete. */
1517 sd->state = sd_receivingdata_state;
1518 }
1519 break;
1520
1521 case 26: /* CMD26: PROGRAM_CID */
1522 sd->data[sd->data_offset ++] = value;
1523 if (sd->data_offset >= sizeof(sd->cid)) {
1524 /* TODO: Check CRC before committing */
1525 sd->state = sd_programming_state;
1526 for (i = 0; i < sizeof(sd->cid); i ++)
1527 if ((sd->cid[i] | 0x00) != sd->data[i])
1528 sd->card_status |= CID_CSD_OVERWRITE;
1529
1530 if (!(sd->card_status & CID_CSD_OVERWRITE))
1531 for (i = 0; i < sizeof(sd->cid); i ++) {
1532 sd->cid[i] |= 0x00;
1533 sd->cid[i] &= sd->data[i];
1534 }
1535 /* Bzzzzzzztt .... Operation complete. */
1536 sd->state = sd_transfer_state;
1537 }
1538 break;
1539
1540 case 27: /* CMD27: PROGRAM_CSD */
1541 sd->data[sd->data_offset ++] = value;
1542 if (sd->data_offset >= sizeof(sd->csd)) {
1543 /* TODO: Check CRC before committing */
1544 sd->state = sd_programming_state;
1545 for (i = 0; i < sizeof(sd->csd); i ++)
1546 if ((sd->csd[i] | sd_csd_rw_mask[i]) !=
1547 (sd->data[i] | sd_csd_rw_mask[i]))
1548 sd->card_status |= CID_CSD_OVERWRITE;
1549
1550 /* Copy flag (OTP) & Permanent write protect */
1551 if (sd->csd[14] & ~sd->data[14] & 0x60)
1552 sd->card_status |= CID_CSD_OVERWRITE;
1553
1554 if (!(sd->card_status & CID_CSD_OVERWRITE))
1555 for (i = 0; i < sizeof(sd->csd); i ++) {
1556 sd->csd[i] |= sd_csd_rw_mask[i];
1557 sd->csd[i] &= sd->data[i];
1558 }
1559 /* Bzzzzzzztt .... Operation complete. */
1560 sd->state = sd_transfer_state;
1561 }
1562 break;
1563
1564 case 42: /* CMD42: LOCK_UNLOCK */
1565 sd->data[sd->data_offset ++] = value;
1566 if (sd->data_offset >= sd->blk_len) {
1567 /* TODO: Check CRC before committing */
1568 sd->state = sd_programming_state;
1569 sd_lock_command(sd);
1570 /* Bzzzzzzztt .... Operation complete. */
1571 sd->state = sd_transfer_state;
1572 }
1573 break;
1574
1575 case 56: /* CMD56: GEN_CMD */
1576 sd->data[sd->data_offset ++] = value;
1577 if (sd->data_offset >= sd->blk_len) {
1578 APP_WRITE_BLOCK(sd->data_start, sd->data_offset);
1579 sd->state = sd_transfer_state;
1580 }
1581 break;
1582
1583 default:
1584 fprintf(stderr, "sd_write_data: unknown command\n");
1585 break;
1586 }
1587 }
1588
1589 uint8_t sd_read_data(SDState *sd)
1590 {
1591 /* TODO: Append CRCs */
1592 uint8_t ret;
1593 int io_len;
1594
1595 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1596 return 0x00;
1597
1598 if (sd->state != sd_sendingdata_state) {
1599 fprintf(stderr, "sd_read_data: not in Sending-Data state\n");
1600 return 0x00;
1601 }
1602
1603 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1604 return 0x00;
1605
1606 io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len;
1607
1608 switch (sd->current_cmd) {
1609 case 6: /* CMD6: SWITCH_FUNCTION */
1610 ret = sd->data[sd->data_offset ++];
1611
1612 if (sd->data_offset >= 64)
1613 sd->state = sd_transfer_state;
1614 break;
1615
1616 case 9: /* CMD9: SEND_CSD */
1617 case 10: /* CMD10: SEND_CID */
1618 ret = sd->data[sd->data_offset ++];
1619
1620 if (sd->data_offset >= 16)
1621 sd->state = sd_transfer_state;
1622 break;
1623
1624 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
1625 if (sd->data_offset == 0)
1626 BLK_READ_BLOCK(sd->data_start, io_len);
1627 ret = sd->data[sd->data_offset ++];
1628
1629 if (sd->data_offset >= io_len) {
1630 sd->data_start += io_len;
1631 sd->data_offset = 0;
1632 if (sd->data_start + io_len > sd->size) {
1633 sd->card_status |= ADDRESS_ERROR;
1634 break;
1635 }
1636 }
1637 break;
1638
1639 case 13: /* ACMD13: SD_STATUS */
1640 ret = sd->sd_status[sd->data_offset ++];
1641
1642 if (sd->data_offset >= sizeof(sd->sd_status))
1643 sd->state = sd_transfer_state;
1644 break;
1645
1646 case 17: /* CMD17: READ_SINGLE_BLOCK */
1647 if (sd->data_offset == 0)
1648 BLK_READ_BLOCK(sd->data_start, io_len);
1649 ret = sd->data[sd->data_offset ++];
1650
1651 if (sd->data_offset >= io_len)
1652 sd->state = sd_transfer_state;
1653 break;
1654
1655 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
1656 if (sd->data_offset == 0)
1657 BLK_READ_BLOCK(sd->data_start, io_len);
1658 ret = sd->data[sd->data_offset ++];
1659
1660 if (sd->data_offset >= io_len) {
1661 sd->data_start += io_len;
1662 sd->data_offset = 0;
1663 if (sd->data_start + io_len > sd->size) {
1664 sd->card_status |= ADDRESS_ERROR;
1665 break;
1666 }
1667 }
1668 break;
1669
1670 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1671 ret = sd->data[sd->data_offset ++];
1672
1673 if (sd->data_offset >= 4)
1674 sd->state = sd_transfer_state;
1675 break;
1676
1677 case 30: /* CMD30: SEND_WRITE_PROT */
1678 ret = sd->data[sd->data_offset ++];
1679
1680 if (sd->data_offset >= 4)
1681 sd->state = sd_transfer_state;
1682 break;
1683
1684 case 51: /* ACMD51: SEND_SCR */
1685 ret = sd->scr[sd->data_offset ++];
1686
1687 if (sd->data_offset >= sizeof(sd->scr))
1688 sd->state = sd_transfer_state;
1689 break;
1690
1691 case 56: /* CMD56: GEN_CMD */
1692 if (sd->data_offset == 0)
1693 APP_READ_BLOCK(sd->data_start, sd->blk_len);
1694 ret = sd->data[sd->data_offset ++];
1695
1696 if (sd->data_offset >= sd->blk_len)
1697 sd->state = sd_transfer_state;
1698 break;
1699
1700 default:
1701 fprintf(stderr, "sd_read_data: unknown command\n");
1702 return 0x00;
1703 }
1704
1705 return ret;
1706 }
1707
1708 bool sd_data_ready(SDState *sd)
1709 {
1710 return sd->state == sd_sendingdata_state;
1711 }
1712
1713 void sd_enable(SDState *sd, bool enable)
1714 {
1715 sd->enable = enable;
1716 }
Various patches