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Merge commit 'origin/master' into dev-mini2440-stable
[qemu/mini2440.git] / hw / sd.c
blob4618883fa69c804f2c19826d2a603ec492943c11
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
36 //#define DEBUG_SD 1
37
38 #ifdef DEBUG_SD
39 #define DPRINTF(fmt, args...) \
40 do { fprintf(stderr, "SD: " fmt , ##args); } while (0)
41 #else
42 #define DPRINTF(fmt, args...) do {} while(0)
43 #endif
44
45 typedef enum {
46 sd_r0 = 0, /* no response */
47 sd_r1, /* normal response command */
48 sd_r2_i, /* CID register */
49 sd_r2_s, /* CSD register */
50 sd_r3, /* OCR register */
51 sd_r6 = 6, /* Published RCA response */
52 sd_r7, /* Operating voltage */
53 sd_r1b = -1,
54 } sd_rsp_type_t;
55
56 struct SDState {
57 enum {
58 sd_inactive,
59 sd_card_identification_mode,
60 sd_data_transfer_mode,
61 } mode;
62 enum {
63 sd_inactive_state = -1,
64 sd_idle_state = 0,
65 sd_ready_state,
66 sd_identification_state,
67 sd_standby_state,
68 sd_transfer_state,
69 sd_sendingdata_state,
70 sd_receivingdata_state,
71 sd_programming_state,
72 sd_disconnect_state,
73 } state;
74 uint32_t ocr;
75 uint8_t scr[8];
76 uint8_t cid[16];
77 uint8_t csd[16];
78 uint16_t rca;
79 uint32_t card_status;
80 uint8_t sd_status[64];
81 uint32_t vhs;
82 int wp_switch;
83 int *wp_groups;
84 uint32_t size;
85 int blk_len;
86 uint32_t erase_start;
87 uint32_t erase_end;
88 uint8_t pwd[16];
89 int pwd_len;
90 int function_group[6];
91
92 int spi;
93 int current_cmd;
94 int blk_written;
95 uint32_t data_start;
96 uint32_t data_offset;
97 uint8_t data[512];
98 qemu_irq readonly_cb;
99 qemu_irq inserted_cb;
100 BlockDriverState *bdrv;
101 uint8_t *buf;
102
103 int enable;
104 };
105
106 static void sd_set_status(SDState *sd)
107 {
108 switch (sd->state) {
109 case sd_inactive_state:
110 sd->mode = sd_inactive;
111 break;
112
113 case sd_idle_state:
114 case sd_ready_state:
115 case sd_identification_state:
116 sd->mode = sd_card_identification_mode;
117 break;
118
119 case sd_standby_state:
120 case sd_transfer_state:
121 case sd_sendingdata_state:
122 case sd_receivingdata_state:
123 case sd_programming_state:
124 case sd_disconnect_state:
125 sd->mode = sd_data_transfer_mode;
126 break;
127 }
128
129 sd->card_status &= ~CURRENT_STATE;
130 sd->card_status |= sd->state << 9;
131 }
132
133 static const sd_cmd_type_t sd_cmd_type[64] = {
134 sd_bc, sd_none, sd_bcr, sd_bcr, sd_none, sd_none, sd_none, sd_ac,
135 sd_bcr, sd_ac, sd_ac, sd_adtc, sd_ac, sd_ac, sd_none, sd_ac,
136 sd_ac, sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none,
137 sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac, sd_ac, sd_adtc, sd_none,
138 sd_ac, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none,
139 sd_none, sd_none, sd_bc, sd_none, sd_none, sd_none, sd_none, sd_none,
140 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac,
141 sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
142 };
143
144 static const sd_cmd_type_t sd_acmd_type[64] = {
145 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none,
146 sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_none, sd_none,
147 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_adtc, sd_ac,
148 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
149 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none,
150 sd_none, sd_bcr, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_none,
151 sd_none, sd_none, sd_none, sd_adtc, 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 };
154
155 static const int sd_cmd_class[64] = {
156 0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 1, 0, 0, 0, 0,
157 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 6, 6, 6, 6,
158 5, 5, 10, 10, 10, 10, 5, 9, 9, 9, 7, 7, 7, 7, 7, 7,
159 7, 7, 10, 7, 9, 9, 9, 8, 8, 10, 8, 8, 8, 8, 8, 8,
160 };
161
162 static uint8_t sd_crc7(void *message, size_t width)
163 {
164 int i, bit;
165 uint8_t shift_reg = 0x00;
166 uint8_t *msg = (uint8_t *) message;
167
168 for (i = 0; i < width; i ++, msg ++)
169 for (bit = 7; bit >= 0; bit --) {
170 shift_reg <<= 1;
171 if ((shift_reg >> 7) ^ ((*msg >> bit) & 1))
172 shift_reg ^= 0x89;
173 }
174
175 return shift_reg;
176 }
177
178 static uint16_t sd_crc16(void *message, size_t width)
179 {
180 int i, bit;
181 uint16_t shift_reg = 0x0000;
182 uint16_t *msg = (uint16_t *) message;
183 width <<= 1;
184
185 for (i = 0; i < width; i ++, msg ++)
186 for (bit = 15; bit >= 0; bit --) {
187 shift_reg <<= 1;
188 if ((shift_reg >> 15) ^ ((*msg >> bit) & 1))
189 shift_reg ^= 0x1011;
190 }
191
192 return shift_reg;
193 }
194
195 static void sd_set_ocr(SDState *sd)
196 {
197 /* All voltages OK, card power-up OK, Standard Capacity SD Memory Card */
198 sd->ocr = 0x80ffff00;
199 }
200
201 static void sd_set_scr(SDState *sd)
202 {
203 sd->scr[0] = 0x00; /* SCR Structure */
204 sd->scr[1] = 0x2f; /* SD Security Support */
205 sd->scr[2] = 0x00;
206 sd->scr[3] = 0x00;
207 sd->scr[4] = 0x00;
208 sd->scr[5] = 0x00;
209 sd->scr[6] = 0x00;
210 sd->scr[7] = 0x00;
211 }
212
213 #define MID 0xaa
214 #define OID "XY"
215 #define PNM "QEMU!"
216 #define PRV 0x01
217 #define MDT_YR 2006
218 #define MDT_MON 2
219
220 static void sd_set_cid(SDState *sd)
221 {
222 sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */
223 sd->cid[1] = OID[0]; /* OEM/Application ID (OID) */
224 sd->cid[2] = OID[1];
225 sd->cid[3] = PNM[0]; /* Fake product name (PNM) */
226 sd->cid[4] = PNM[1];
227 sd->cid[5] = PNM[2];
228 sd->cid[6] = PNM[3];
229 sd->cid[7] = PNM[4];
230 sd->cid[8] = PRV; /* Fake product revision (PRV) */
231 sd->cid[9] = 0xde; /* Fake serial number (PSN) */
232 sd->cid[10] = 0xad;
233 sd->cid[11] = 0xbe;
234 sd->cid[12] = 0xef;
235 sd->cid[13] = 0x00 | /* Manufacture date (MDT) */
236 ((MDT_YR - 2000) / 10);
237 sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON;
238 sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1;
239 }
240
241 #define HWBLOCK_SHIFT 9 /* 512 bytes */
242 #define SECTOR_SHIFT 5 /* 16 kilobytes */
243 #define WPGROUP_SHIFT 7 /* 2 megs */
244 #define CMULT_SHIFT 9 /* 512 times HWBLOCK_SIZE */
245 #define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))
246
247 static const uint8_t sd_csd_rw_mask[16] = {
248 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
249 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
250 };
251
252 static void sd_set_csd(SDState *sd, uint32_t size)
253 {
254 uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
255 uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
256 uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
257
258 sd->csd[0] = 0x00; /* CSD structure */
259 sd->csd[1] = 0x26; /* Data read access-time-1 */
260 sd->csd[2] = 0x00; /* Data read access-time-2 */
261 sd->csd[3] = 0x5a; /* Max. data transfer rate */
262 sd->csd[4] = 0x5f; /* Card Command Classes */
263 sd->csd[5] = 0x50 | /* Max. read data block length */
264 HWBLOCK_SHIFT;
265 sd->csd[6] = 0xe0 | /* Partial block for read allowed */
266 ((csize >> 10) & 0x03);
267 sd->csd[7] = 0x00 | /* Device size */
268 ((csize >> 2) & 0xff);
269 sd->csd[8] = 0x3f | /* Max. read current */
270 ((csize << 6) & 0xc0);
271 sd->csd[9] = 0xfc | /* Max. write current */
272 ((CMULT_SHIFT - 2) >> 1);
273 sd->csd[10] = 0x40 | /* Erase sector size */
274 (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
275 sd->csd[11] = 0x00 | /* Write protect group size */
276 ((sectsize << 7) & 0x80) | wpsize;
277 sd->csd[12] = 0x90 | /* Write speed factor */
278 (HWBLOCK_SHIFT >> 2);
279 sd->csd[13] = 0x20 | /* Max. write data block length */
280 ((HWBLOCK_SHIFT << 6) & 0xc0);
281 sd->csd[14] = 0x00; /* File format group */
282 sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
283 }
284
285 static void sd_set_rca(SDState *sd)
286 {
287 sd->rca += 0x4567;
288 }
289
290 #define CARD_STATUS_A 0x02004100
291 #define CARD_STATUS_B 0x00c01e00
292 #define CARD_STATUS_C 0xfd39a028
293
294 static void sd_set_cardstatus(SDState *sd)
295 {
296 sd->card_status = 0x00000100;
297 }
298
299 static void sd_set_sdstatus(SDState *sd)
300 {
301 memset(sd->sd_status, 0, 64);
302 }
303
304 static int sd_req_crc_validate(struct sd_request_s *req)
305 {
306 uint8_t buffer[5];
307 buffer[0] = 0x40 | req->cmd;
308 buffer[1] = (req->arg >> 24) & 0xff;
309 buffer[2] = (req->arg >> 16) & 0xff;
310 buffer[3] = (req->arg >> 8) & 0xff;
311 buffer[4] = (req->arg >> 0) & 0xff;
312 return 0;
313 return sd_crc7(buffer, 5) != req->crc; /* TODO */
314 }
315
316 static void sd_response_r1_make(SDState *sd,
317 uint8_t *response, uint32_t last_status)
318 {
319 uint32_t mask = CARD_STATUS_B ^ ILLEGAL_COMMAND;
320 uint32_t status;
321
322 status = (sd->card_status & ~mask) | (last_status & mask);
323 sd->card_status &= ~CARD_STATUS_C | APP_CMD;
324
325 response[0] = (status >> 24) & 0xff;
326 response[1] = (status >> 16) & 0xff;
327 response[2] = (status >> 8) & 0xff;
328 response[3] = (status >> 0) & 0xff;
329 }
330
331 static void sd_response_r3_make(SDState *sd, uint8_t *response)
332 {
333 response[0] = (sd->ocr >> 24) & 0xff;
334 response[1] = (sd->ocr >> 16) & 0xff;
335 response[2] = (sd->ocr >> 8) & 0xff;
336 response[3] = (sd->ocr >> 0) & 0xff;
337 }
338
339 static void sd_response_r6_make(SDState *sd, uint8_t *response)
340 {
341 uint16_t arg;
342 uint16_t status;
343
344 arg = sd->rca;
345 status = ((sd->card_status >> 8) & 0xc000) |
346 ((sd->card_status >> 6) & 0x2000) |
347 (sd->card_status & 0x1fff);
348
349 response[0] = (arg >> 8) & 0xff;
350 response[1] = arg & 0xff;
351 response[2] = (status >> 8) & 0xff;
352 response[3] = status & 0xff;
353 }
354
355 static void sd_response_r7_make(SDState *sd, uint8_t *response)
356 {
357 response[0] = (sd->vhs >> 24) & 0xff;
358 response[1] = (sd->vhs >> 16) & 0xff;
359 response[2] = (sd->vhs >> 8) & 0xff;
360 response[3] = (sd->vhs >> 0) & 0xff;
361 }
362
363 static void sd_reset(SDState *sd, BlockDriverState *bdrv)
364 {
365 uint32_t size;
366 uint64_t sect;
367
368 bdrv_get_geometry(bdrv, &sect);
369 sect <<= 9;
370
371 if (sect > 0x40000000)
372 size = 0x40000000; /* 1 gig */
373 else
374 size = sect + 1;
375
376 sect = (size >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)) + 1;
377
378 sd->state = sd_idle_state;
379 sd->rca = 0x0000;
380 sd_set_ocr(sd);
381 sd_set_scr(sd);
382 sd_set_cid(sd);
383 sd_set_csd(sd, size);
384 sd_set_cardstatus(sd);
385 sd_set_sdstatus(sd);
386
387 sd->bdrv = bdrv;
388
389 if (sd->wp_groups)
390 qemu_free(sd->wp_groups);
391 sd->wp_switch = bdrv_is_read_only(bdrv);
392 sd->wp_groups = (int *) qemu_mallocz(sizeof(int) * sect);
393 memset(sd->function_group, 0, sizeof(int) * 6);
394 sd->erase_start = 0;
395 sd->erase_end = 0;
396 sd->size = size;
397 sd->blk_len = 0x200;
398 sd->pwd_len = 0;
399 }
400
401 static void sd_cardchange(void *opaque)
402 {
403 SDState *sd = opaque;
404 qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv));
405 if (bdrv_is_inserted(sd->bdrv)) {
406 sd_reset(sd, sd->bdrv);
407 qemu_set_irq(sd->readonly_cb, sd->wp_switch);
408 }
409 }
410
411 /* We do not model the chip select pin, so allow the board to select
412 whether card should be in SSI or MMC/SD mode. It is also up to the
413 board to ensure that ssi transfers only occur when the chip select
414 is asserted. */
415 SDState *sd_init(BlockDriverState *bs, int is_spi)
416 {
417 SDState *sd;
418
419 sd = (SDState *) qemu_mallocz(sizeof(SDState));
420 sd->buf = qemu_memalign(512, 512);
421 sd->spi = is_spi;
422 sd->enable = 1;
423 sd_reset(sd, bs);
424 bdrv_set_change_cb(sd->bdrv, sd_cardchange, sd);
425 return sd;
426 }
427
428 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
429 {
430 sd->readonly_cb = readonly;
431 sd->inserted_cb = insert;
432 qemu_set_irq(readonly, bdrv_is_read_only(sd->bdrv));
433 qemu_set_irq(insert, bdrv_is_inserted(sd->bdrv));
434 }
435
436 static void sd_erase(SDState *sd)
437 {
438 int i, start, end;
439 if (!sd->erase_start || !sd->erase_end) {
440 sd->card_status |= ERASE_SEQ_ERROR;
441 return;
442 }
443
444 start = sd->erase_start >>
445 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
446 end = sd->erase_end >>
447 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
448 sd->erase_start = 0;
449 sd->erase_end = 0;
450 sd->csd[14] |= 0x40;
451
452 for (i = start; i <= end; i ++)
453 if (sd->wp_groups[i])
454 sd->card_status |= WP_ERASE_SKIP;
455 }
456
457 static uint32_t sd_wpbits(SDState *sd, uint32_t addr)
458 {
459 uint32_t i, wpnum;
460 uint32_t ret = 0;
461
462 wpnum = addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
463
464 for (i = 0; i < 32; i ++, wpnum ++, addr += WPGROUP_SIZE)
465 if (addr < sd->size && sd->wp_groups[wpnum])
466 ret |= (1 << i);
467
468 return ret;
469 }
470
471 static void sd_function_switch(SDState *sd, uint32_t arg)
472 {
473 int i, mode, new_func, crc;
474 mode = !!(arg & 0x80000000);
475
476 sd->data[0] = 0x00; /* Maximum current consumption */
477 sd->data[1] = 0x01;
478 sd->data[2] = 0x80; /* Supported group 6 functions */
479 sd->data[3] = 0x01;
480 sd->data[4] = 0x80; /* Supported group 5 functions */
481 sd->data[5] = 0x01;
482 sd->data[6] = 0x80; /* Supported group 4 functions */
483 sd->data[7] = 0x01;
484 sd->data[8] = 0x80; /* Supported group 3 functions */
485 sd->data[9] = 0x01;
486 sd->data[10] = 0x80; /* Supported group 2 functions */
487 sd->data[11] = 0x43;
488 sd->data[12] = 0x80; /* Supported group 1 functions */
489 sd->data[13] = 0x03;
490 for (i = 0; i < 6; i ++) {
491 new_func = (arg >> (i * 4)) & 0x0f;
492 if (mode && new_func != 0x0f)
493 sd->function_group[i] = new_func;
494 sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4);
495 }
496 memset(&sd->data[17], 0, 47);
497 crc = sd_crc16(sd->data, 64);
498 sd->data[65] = crc >> 8;
499 sd->data[66] = crc & 0xff;
500 }
501
502 static inline int sd_wp_addr(SDState *sd, uint32_t addr)
503 {
504 return sd->wp_groups[addr >>
505 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)];
506 }
507
508 static void sd_lock_command(SDState *sd)
509 {
510 int erase, lock, clr_pwd, set_pwd, pwd_len;
511 erase = !!(sd->data[0] & 0x08);
512 lock = sd->data[0] & 0x04;
513 clr_pwd = sd->data[0] & 0x02;
514 set_pwd = sd->data[0] & 0x01;
515
516 if (sd->blk_len > 1)
517 pwd_len = sd->data[1];
518 else
519 pwd_len = 0;
520
521 if (erase) {
522 if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 ||
523 set_pwd || clr_pwd || lock || sd->wp_switch ||
524 (sd->csd[14] & 0x20)) {
525 sd->card_status |= LOCK_UNLOCK_FAILED;
526 return;
527 }
528 memset(sd->wp_groups, 0, sizeof(int) * (sd->size >>
529 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)));
530 sd->csd[14] &= ~0x10;
531 sd->card_status &= ~CARD_IS_LOCKED;
532 sd->pwd_len = 0;
533 /* Erasing the entire card here! */
534 fprintf(stderr, "SD: Card force-erased by CMD42\n");
535 return;
536 }
537
538 if (sd->blk_len < 2 + pwd_len ||
539 pwd_len <= sd->pwd_len ||
540 pwd_len > sd->pwd_len + 16) {
541 sd->card_status |= LOCK_UNLOCK_FAILED;
542 return;
543 }
544
545 if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) {
546 sd->card_status |= LOCK_UNLOCK_FAILED;
547 return;
548 }
549
550 pwd_len -= sd->pwd_len;
551 if ((pwd_len && !set_pwd) ||
552 (clr_pwd && (set_pwd || lock)) ||
553 (lock && !sd->pwd_len && !set_pwd) ||
554 (!set_pwd && !clr_pwd &&
555 (((sd->card_status & CARD_IS_LOCKED) && lock) ||
556 (!(sd->card_status & CARD_IS_LOCKED) && !lock)))) {
557 sd->card_status |= LOCK_UNLOCK_FAILED;
558 return;
559 }
560
561 if (set_pwd) {
562 memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
563 sd->pwd_len = pwd_len;
564 }
565
566 if (clr_pwd) {
567 sd->pwd_len = 0;
568 }
569
570 if (lock)
571 sd->card_status |= CARD_IS_LOCKED;
572 else
573 sd->card_status &= ~CARD_IS_LOCKED;
574 }
575
576 static sd_rsp_type_t sd_normal_command(SDState *sd,
577 struct sd_request_s req)
578 {
579 uint32_t rca = 0x0000;
580
581 if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
582 rca = req.arg >> 16;
583
584 DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
585 switch (req.cmd) {
586 /* Basic commands (Class 0 and Class 1) */
587 case 0: /* CMD0: GO_IDLE_STATE */
588 switch (sd->state) {
589 case sd_inactive_state:
590 return sd->spi ? sd_r1 : sd_r0;
591
592 default:
593 sd->state = sd_idle_state;
594 sd_reset(sd, sd->bdrv);
595 return sd->spi ? sd_r1 : sd_r0;
596 }
597 break;
598
599 case 1: /* CMD1: SEND_OP_CMD */
600 if (!sd->spi)
601 goto bad_cmd;
602
603 sd->state = sd_transfer_state;
604 return sd_r1;
605
606 case 2: /* CMD2: ALL_SEND_CID */
607 if (sd->spi)
608 goto bad_cmd;
609 switch (sd->state) {
610 case sd_ready_state:
611 sd->state = sd_identification_state;
612 return sd_r2_i;
613
614 default:
615 break;
616 }
617 break;
618
619 case 3: /* CMD3: SEND_RELATIVE_ADDR */
620 if (sd->spi)
621 goto bad_cmd;
622 switch (sd->state) {
623 case sd_identification_state:
624 case sd_standby_state:
625 sd->state = sd_standby_state;
626 sd_set_rca(sd);
627 return sd_r6;
628
629 default:
630 break;
631 }
632 break;
633
634 case 4: /* CMD4: SEND_DSR */
635 if (sd->spi)
636 goto bad_cmd;
637 switch (sd->state) {
638 case sd_standby_state:
639 break;
640
641 default:
642 break;
643 }
644 break;
645
646 case 6: /* CMD6: SWITCH_FUNCTION */
647 if (sd->spi)
648 goto bad_cmd;
649 switch (sd->mode) {
650 case sd_data_transfer_mode:
651 sd_function_switch(sd, req.arg);
652 sd->state = sd_sendingdata_state;
653 sd->data_start = 0;
654 sd->data_offset = 0;
655 return sd_r1;
656
657 default:
658 break;
659 }
660 break;
661
662 case 7: /* CMD7: SELECT/DESELECT_CARD */
663 if (sd->spi)
664 goto bad_cmd;
665 switch (sd->state) {
666 case sd_standby_state:
667 if (sd->rca != rca)
668 return sd_r0;
669
670 sd->state = sd_transfer_state;
671 return sd_r1b;
672
673 case sd_transfer_state:
674 case sd_sendingdata_state:
675 if (sd->rca == rca)
676 break;
677
678 sd->state = sd_standby_state;
679 return sd_r1b;
680
681 case sd_disconnect_state:
682 if (sd->rca != rca)
683 return sd_r0;
684
685 sd->state = sd_programming_state;
686 return sd_r1b;
687
688 case sd_programming_state:
689 if (sd->rca == rca)
690 break;
691
692 sd->state = sd_disconnect_state;
693 return sd_r1b;
694
695 default:
696 break;
697 }
698 break;
699
700 case 8: /* CMD8: SEND_IF_COND */
701 /* Physical Layer Specification Version 2.00 command */
702 switch (sd->state) {
703 case sd_idle_state:
704 sd->vhs = 0;
705
706 /* No response if not exactly one VHS bit is set. */
707 if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff)))
708 return sd->spi ? sd_r7 : sd_r0;
709
710 /* Accept. */
711 sd->vhs = req.arg;
712 return sd_r7;
713
714 default:
715 break;
716 }
717 break;
718
719 case 9: /* CMD9: SEND_CSD */
720 switch (sd->state) {
721 case sd_standby_state:
722 if (sd->rca != rca)
723 return sd_r0;
724
725 return sd_r2_s;
726
727 case sd_transfer_state:
728 if (!sd->spi)
729 break;
730 sd->state = sd_sendingdata_state;
731 memcpy(sd->data, sd->csd, 16);
732 sd->data_start = req.arg;
733 sd->data_offset = 0;
734 return sd_r1;
735
736 default:
737 break;
738 }
739 break;
740
741 case 10: /* CMD10: SEND_CID */
742 switch (sd->state) {
743 case sd_standby_state:
744 if (sd->rca != rca)
745 return sd_r0;
746
747 return sd_r2_i;
748
749 case sd_transfer_state:
750 if (!sd->spi)
751 break;
752 sd->state = sd_sendingdata_state;
753 memcpy(sd->data, sd->cid, 16);
754 sd->data_start = req.arg;
755 sd->data_offset = 0;
756 return sd_r1;
757
758 default:
759 break;
760 }
761 break;
762
763 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
764 if (sd->spi)
765 goto bad_cmd;
766 switch (sd->state) {
767 case sd_transfer_state:
768 sd->state = sd_sendingdata_state;
769 sd->data_start = req.arg;
770 sd->data_offset = 0;
771
772 if (sd->data_start + sd->blk_len > sd->size)
773 sd->card_status |= ADDRESS_ERROR;
774 return sd_r0;
775
776 default:
777 break;
778 }
779 break;
780
781 case 12: /* CMD12: STOP_TRANSMISSION */
782 switch (sd->state) {
783 case sd_sendingdata_state:
784 sd->state = sd_transfer_state;
785 return sd_r1b;
786
787 case sd_receivingdata_state:
788 sd->state = sd_programming_state;
789 /* Bzzzzzzztt .... Operation complete. */
790 sd->state = sd_transfer_state;
791 return sd_r1b;
792
793 default:
794 break;
795 }
796 break;
797
798 case 13: /* CMD13: SEND_STATUS */
799 switch (sd->mode) {
800 case sd_data_transfer_mode:
801 if (sd->rca != rca)
802 return sd_r0;
803
804 return sd_r1;
805
806 default:
807 break;
808 }
809 break;
810
811 case 15: /* CMD15: GO_INACTIVE_STATE */
812 if (sd->spi)
813 goto bad_cmd;
814 switch (sd->mode) {
815 case sd_data_transfer_mode:
816 if (sd->rca != rca)
817 return sd_r0;
818
819 sd->state = sd_inactive_state;
820 return sd_r0;
821
822 default:
823 break;
824 }
825 break;
826
827 /* Block read commands (Classs 2) */
828 case 16: /* CMD16: SET_BLOCKLEN */
829 switch (sd->state) {
830 case sd_transfer_state:
831 if (req.arg > (1 << HWBLOCK_SHIFT))
832 sd->card_status |= BLOCK_LEN_ERROR;
833 else
834 sd->blk_len = req.arg;
835
836 return sd_r1;
837
838 default:
839 break;
840 }
841 break;
842
843 case 17: /* CMD17: READ_SINGLE_BLOCK */
844 switch (sd->state) {
845 case sd_transfer_state:
846 sd->state = sd_sendingdata_state;
847 sd->data_start = req.arg;
848 sd->data_offset = 0;
849
850 if (sd->data_start + sd->blk_len > sd->size)
851 sd->card_status |= ADDRESS_ERROR;
852 return sd_r1;
853
854 default:
855 break;
856 }
857 break;
858
859 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
860 switch (sd->state) {
861 case sd_transfer_state:
862 sd->state = sd_sendingdata_state;
863 sd->data_start = req.arg;
864 sd->data_offset = 0;
865
866 if (sd->data_start + sd->blk_len > sd->size)
867 sd->card_status |= ADDRESS_ERROR;
868 return sd_r1;
869
870 default:
871 break;
872 }
873 break;
874
875 /* Block write commands (Class 4) */
876 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
877 if (sd->spi)
878 goto unimplemented_cmd;
879 switch (sd->state) {
880 case sd_transfer_state:
881 /* Writing in SPI mode not implemented. */
882 if (sd->spi)
883 break;
884 sd->state = sd_receivingdata_state;
885 sd->data_start = req.arg;
886 sd->data_offset = 0;
887 sd->blk_written = 0;
888
889 if (sd->data_start + sd->blk_len > sd->size)
890 sd->card_status |= ADDRESS_ERROR;
891 if (sd_wp_addr(sd, sd->data_start))
892 sd->card_status |= WP_VIOLATION;
893 if (sd->csd[14] & 0x30)
894 sd->card_status |= WP_VIOLATION;
895 return sd_r1;
896
897 default:
898 break;
899 }
900 break;
901
902 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
903 if (sd->spi)
904 goto unimplemented_cmd;
905 switch (sd->state) {
906 case sd_transfer_state:
907 /* Writing in SPI mode not implemented. */
908 if (sd->spi)
909 break;
910 sd->state = sd_receivingdata_state;
911 sd->data_start = req.arg;
912 sd->data_offset = 0;
913 sd->blk_written = 0;
914
915 if (sd->data_start + sd->blk_len > sd->size)
916 sd->card_status |= ADDRESS_ERROR;
917 if (sd_wp_addr(sd, sd->data_start))
918 sd->card_status |= WP_VIOLATION;
919 if (sd->csd[14] & 0x30)
920 sd->card_status |= WP_VIOLATION;
921 return sd_r1;
922
923 default:
924 break;
925 }
926 break;
927
928 case 26: /* CMD26: PROGRAM_CID */
929 if (sd->spi)
930 goto bad_cmd;
931 switch (sd->state) {
932 case sd_transfer_state:
933 sd->state = sd_receivingdata_state;
934 sd->data_start = 0;
935 sd->data_offset = 0;
936 return sd_r1;
937
938 default:
939 break;
940 }
941 break;
942
943 case 27: /* CMD27: PROGRAM_CSD */
944 if (sd->spi)
945 goto unimplemented_cmd;
946 switch (sd->state) {
947 case sd_transfer_state:
948 sd->state = sd_receivingdata_state;
949 sd->data_start = 0;
950 sd->data_offset = 0;
951 return sd_r1;
952
953 default:
954 break;
955 }
956 break;
957
958 /* Write protection (Class 6) */
959 case 28: /* CMD28: SET_WRITE_PROT */
960 switch (sd->state) {
961 case sd_transfer_state:
962 if (req.arg >= sd->size) {
963 sd->card_status = ADDRESS_ERROR;
964 return sd_r1b;
965 }
966
967 sd->state = sd_programming_state;
968 sd->wp_groups[req.arg >> (HWBLOCK_SHIFT +
969 SECTOR_SHIFT + WPGROUP_SHIFT)] = 1;
970 /* Bzzzzzzztt .... Operation complete. */
971 sd->state = sd_transfer_state;
972 return sd_r1b;
973
974 default:
975 break;
976 }
977 break;
978
979 case 29: /* CMD29: CLR_WRITE_PROT */
980 switch (sd->state) {
981 case sd_transfer_state:
982 if (req.arg >= sd->size) {
983 sd->card_status = ADDRESS_ERROR;
984 return sd_r1b;
985 }
986
987 sd->state = sd_programming_state;
988 sd->wp_groups[req.arg >> (HWBLOCK_SHIFT +
989 SECTOR_SHIFT + WPGROUP_SHIFT)] = 0;
990 /* Bzzzzzzztt .... Operation complete. */
991 sd->state = sd_transfer_state;
992 return sd_r1b;
993
994 default:
995 break;
996 }
997 break;
998
999 case 30: /* CMD30: SEND_WRITE_PROT */
1000 switch (sd->state) {
1001 case sd_transfer_state:
1002 sd->state = sd_sendingdata_state;
1003 *(uint32_t *) sd->data = sd_wpbits(sd, req.arg);
1004 sd->data_start = req.arg;
1005 sd->data_offset = 0;
1006 return sd_r1b;
1007
1008 default:
1009 break;
1010 }
1011 break;
1012
1013 /* Erase commands (Class 5) */
1014 case 32: /* CMD32: ERASE_WR_BLK_START */
1015 switch (sd->state) {
1016 case sd_transfer_state:
1017 sd->erase_start = req.arg;
1018 return sd_r1;
1019
1020 default:
1021 break;
1022 }
1023 break;
1024
1025 case 33: /* CMD33: ERASE_WR_BLK_END */
1026 switch (sd->state) {
1027 case sd_transfer_state:
1028 sd->erase_end = req.arg;
1029 return sd_r1;
1030
1031 default:
1032 break;
1033 }
1034 break;
1035
1036 case 38: /* CMD38: ERASE */
1037 switch (sd->state) {
1038 case sd_transfer_state:
1039 if (sd->csd[14] & 0x30) {
1040 sd->card_status |= WP_VIOLATION;
1041 return sd_r1b;
1042 }
1043
1044 sd->state = sd_programming_state;
1045 sd_erase(sd);
1046 /* Bzzzzzzztt .... Operation complete. */
1047 sd->state = sd_transfer_state;
1048 return sd_r1b;
1049
1050 default:
1051 break;
1052 }
1053 break;
1054
1055 /* Lock card commands (Class 7) */
1056 case 42: /* CMD42: LOCK_UNLOCK */
1057 if (sd->spi)
1058 goto unimplemented_cmd;
1059 switch (sd->state) {
1060 case sd_transfer_state:
1061 sd->state = sd_receivingdata_state;
1062 sd->data_start = 0;
1063 sd->data_offset = 0;
1064 return sd_r1;
1065
1066 default:
1067 break;
1068 }
1069 break;
1070
1071 /* Application specific commands (Class 8) */
1072 case 55: /* CMD55: APP_CMD */
1073 if (sd->rca != rca)
1074 return sd_r0;
1075
1076 sd->card_status |= APP_CMD;
1077 return sd_r1;
1078
1079 case 56: /* CMD56: GEN_CMD */
1080 fprintf(stderr, "SD: GEN_CMD 0x%08x\n", req.arg);
1081
1082 switch (sd->state) {
1083 case sd_transfer_state:
1084 sd->data_offset = 0;
1085 if (req.arg & 1)
1086 sd->state = sd_sendingdata_state;
1087 else
1088 sd->state = sd_receivingdata_state;
1089 return sd_r1;
1090
1091 default:
1092 break;
1093 }
1094 break;
1095
1096 default:
1097 bad_cmd:
1098 sd->card_status |= ILLEGAL_COMMAND;
1099
1100 fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
1101 return sd_r0;
1102
1103 unimplemented_cmd:
1104 /* Commands that are recognised but not yet implemented in SPI mode. */
1105 sd->card_status |= ILLEGAL_COMMAND;
1106 fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
1107 return sd_r0;
1108 }
1109
1110 sd->card_status |= ILLEGAL_COMMAND;
1111 fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
1112 return sd_r0;
1113 }
1114
1115 static sd_rsp_type_t sd_app_command(SDState *sd,
1116 struct sd_request_s req) {
1117 uint32_t rca;
1118
1119 if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
1120 rca = req.arg >> 16;
1121
1122 DPRINTF("ACMD%d 0x%08x\n", req.cmd, req.arg);
1123 switch (req.cmd) {
1124 case 6: /* ACMD6: SET_BUS_WIDTH */
1125 switch (sd->state) {
1126 case sd_transfer_state:
1127 sd->sd_status[0] &= 0x3f;
1128 sd->sd_status[0] |= (req.arg & 0x03) << 6;
1129 return sd_r1;
1130
1131 default:
1132 break;
1133 }
1134 break;
1135
1136 case 13: /* ACMD13: SD_STATUS */
1137 switch (sd->state) {
1138 case sd_transfer_state:
1139 sd->data_start = 0;
1140 sd->data_offset = 0;
1141 return sd_r1;
1142
1143 default:
1144 break;
1145 }
1146 break;
1147
1148 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1149 switch (sd->state) {
1150 case sd_transfer_state:
1151 *(uint32_t *) sd->data = sd->blk_written;
1152
1153 sd->data_start = 0;
1154 sd->data_offset = 0;
1155 return sd_r1;
1156
1157 default:
1158 break;
1159 }
1160 break;
1161
1162 case 23: /* ACMD23: SET_WR_BLK_ERASE_COUNT */
1163 switch (sd->state) {
1164 case sd_transfer_state:
1165 return sd_r1;
1166
1167 default:
1168 break;
1169 }
1170 break;
1171
1172 case 41: /* ACMD41: SD_APP_OP_COND */
1173 if (sd->spi) {
1174 /* SEND_OP_CMD */
1175 sd->state = sd_transfer_state;
1176 return sd_r1;
1177 }
1178 switch (sd->state) {
1179 case sd_idle_state:
1180 /* We accept any voltage. 10000 V is nothing. */
1181 if (req.arg)
1182 sd->state = sd_ready_state;
1183
1184 return sd_r3;
1185
1186 default:
1187 break;
1188 }
1189 break;
1190
1191 case 42: /* ACMD42: SET_CLR_CARD_DETECT */
1192 switch (sd->state) {
1193 case sd_transfer_state:
1194 /* Bringing in the 50KOhm pull-up resistor... Done. */
1195 return sd_r1;
1196
1197 default:
1198 break;
1199 }
1200 break;
1201
1202 case 51: /* ACMD51: SEND_SCR */
1203 switch (sd->state) {
1204 case sd_transfer_state:
1205 sd->state = sd_sendingdata_state;
1206 sd->data_start = 0;
1207 sd->data_offset = 0;
1208 return sd_r1;
1209
1210 default:
1211 break;
1212 }
1213 break;
1214
1215 default:
1216 /* Fall back to standard commands. */
1217 sd->card_status &= ~APP_CMD;
1218 return sd_normal_command(sd, req);
1219 }
1220
1221 fprintf(stderr, "SD: ACMD%i in a wrong state\n", req.cmd);
1222 return sd_r0;
1223 }
1224
1225 int sd_do_command(SDState *sd, struct sd_request_s *req,
1226 uint8_t *response) {
1227 uint32_t last_status = sd->card_status;
1228 sd_rsp_type_t rtype;
1229 int rsplen;
1230
1231 if (!bdrv_is_inserted(sd->bdrv) || !sd->enable) {
1232 return 0;
1233 }
1234
1235 if (sd_req_crc_validate(req)) {
1236 sd->card_status &= ~COM_CRC_ERROR;
1237 return 0;
1238 }
1239
1240 sd->card_status &= ~CARD_STATUS_B;
1241 sd_set_status(sd);
1242
1243 if (last_status & CARD_IS_LOCKED)
1244 if (((last_status & APP_CMD) &&
1245 req->cmd == 41) ||
1246 (!(last_status & APP_CMD) &&
1247 (sd_cmd_class[req->cmd] == 0 ||
1248 sd_cmd_class[req->cmd] == 7 ||
1249 req->cmd == 16 || req->cmd == 55))) {
1250 sd->card_status |= ILLEGAL_COMMAND;
1251 fprintf(stderr, "SD: Card is locked\n");
1252 return 0;
1253 }
1254
1255 if (last_status & APP_CMD) {
1256 rtype = sd_app_command(sd, *req);
1257 sd->card_status &= ~APP_CMD;
1258 } else
1259 rtype = sd_normal_command(sd, *req);
1260
1261 sd->current_cmd = req->cmd;
1262
1263 switch (rtype) {
1264 case sd_r1:
1265 case sd_r1b:
1266 sd_response_r1_make(sd, response, last_status);
1267 rsplen = 4;
1268 break;
1269
1270 case sd_r2_i:
1271 memcpy(response, sd->cid, sizeof(sd->cid));
1272 rsplen = 16;
1273 break;
1274
1275 case sd_r2_s:
1276 memcpy(response, sd->csd, sizeof(sd->csd));
1277 rsplen = 16;
1278 break;
1279
1280 case sd_r3:
1281 sd_response_r3_make(sd, response);
1282 rsplen = 4;
1283 break;
1284
1285 case sd_r6:
1286 sd_response_r6_make(sd, response);
1287 rsplen = 4;
1288 break;
1289
1290 case sd_r7:
1291 sd_response_r7_make(sd, response);
1292 rsplen = 4;
1293 break;
1294
1295 case sd_r0:
1296 default:
1297 rsplen = 0;
1298 break;
1299 }
1300
1301 if (sd->card_status & ILLEGAL_COMMAND)
1302 rsplen = 0;
1303
1304 #ifdef DEBUG_SD
1305 if (rsplen) {
1306 int i;
1307 DPRINTF("Response:");
1308 for (i = 0; i < rsplen; i++)
1309 printf(" %02x", response[i]);
1310 printf(" state %d\n", sd->state);
1311 } else {
1312 DPRINTF("No response %d\n", sd->state);
1313 }
1314 #endif
1315
1316 return rsplen;
1317 }
1318
1319 /* No real need for 64 bit addresses here */
1320 static void sd_blk_read(SDState *sd, uint32_t addr, uint32_t len)
1321 {
1322 uint32_t end = addr + len;
1323
1324 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1325 fprintf(stderr, "sd_blk_read: read error on host side\n");
1326 return;
1327 }
1328
1329 if (end > (addr & ~511) + 512) {
1330 memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511));
1331
1332 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
1333 fprintf(stderr, "sd_blk_read: read error on host side\n");
1334 return;
1335 }
1336 memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511);
1337 } else
1338 memcpy(sd->data, sd->buf + (addr & 511), len);
1339 }
1340
1341 static void sd_blk_write(SDState *sd, uint32_t addr, uint32_t len)
1342 {
1343 uint32_t end = addr + len;
1344
1345 if ((addr & 511) || len < 512)
1346 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1347 fprintf(stderr, "sd_blk_write: read error on host side\n");
1348 return;
1349 }
1350
1351 if (end > (addr & ~511) + 512) {
1352 memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511));
1353 if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1354 fprintf(stderr, "sd_blk_write: write error on host side\n");
1355 return;
1356 }
1357
1358 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
1359 fprintf(stderr, "sd_blk_write: read error on host side\n");
1360 return;
1361 }
1362 memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511);
1363 if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) == -1)
1364 fprintf(stderr, "sd_blk_write: write error on host side\n");
1365 } else {
1366 memcpy(sd->buf + (addr & 511), sd->data, len);
1367 if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1)
1368 fprintf(stderr, "sd_blk_write: write error on host side\n");
1369 }
1370 }
1371
1372 #define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len)
1373 #define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len)
1374 #define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len)
1375 #define APP_WRITE_BLOCK(a, len)
1376
1377 void sd_write_data(SDState *sd, uint8_t value)
1378 {
1379 int i;
1380
1381 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1382 return;
1383
1384 if (sd->state != sd_receivingdata_state) {
1385 fprintf(stderr, "sd_write_data: not in Receiving-Data state\n");
1386 return;
1387 }
1388
1389 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1390 return;
1391
1392 switch (sd->current_cmd) {
1393 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
1394 sd->data[sd->data_offset ++] = value;
1395 if (sd->data_offset >= sd->blk_len) {
1396 /* TODO: Check CRC before committing */
1397 sd->state = sd_programming_state;
1398 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1399 sd->blk_written ++;
1400 sd->csd[14] |= 0x40;
1401 /* Bzzzzzzztt .... Operation complete. */
1402 sd->state = sd_transfer_state;
1403 }
1404 break;
1405
1406 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
1407 sd->data[sd->data_offset ++] = value;
1408 if (sd->data_offset >= sd->blk_len) {
1409 /* TODO: Check CRC before committing */
1410 sd->state = sd_programming_state;
1411 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1412 sd->blk_written ++;
1413 sd->data_start += sd->blk_len;
1414 sd->data_offset = 0;
1415 if (sd->data_start + sd->blk_len > sd->size) {
1416 sd->card_status |= ADDRESS_ERROR;
1417 break;
1418 }
1419 if (sd_wp_addr(sd, sd->data_start)) {
1420 sd->card_status |= WP_VIOLATION;
1421 break;
1422 }
1423 sd->csd[14] |= 0x40;
1424
1425 /* Bzzzzzzztt .... Operation complete. */
1426 sd->state = sd_receivingdata_state;
1427 }
1428 break;
1429
1430 case 26: /* CMD26: PROGRAM_CID */
1431 sd->data[sd->data_offset ++] = value;
1432 if (sd->data_offset >= sizeof(sd->cid)) {
1433 /* TODO: Check CRC before committing */
1434 sd->state = sd_programming_state;
1435 for (i = 0; i < sizeof(sd->cid); i ++)
1436 if ((sd->cid[i] | 0x00) != sd->data[i])
1437 sd->card_status |= CID_CSD_OVERWRITE;
1438
1439 if (!(sd->card_status & CID_CSD_OVERWRITE))
1440 for (i = 0; i < sizeof(sd->cid); i ++) {
1441 sd->cid[i] |= 0x00;
1442 sd->cid[i] &= sd->data[i];
1443 }
1444 /* Bzzzzzzztt .... Operation complete. */
1445 sd->state = sd_transfer_state;
1446 }
1447 break;
1448
1449 case 27: /* CMD27: PROGRAM_CSD */
1450 sd->data[sd->data_offset ++] = value;
1451 if (sd->data_offset >= sizeof(sd->csd)) {
1452 /* TODO: Check CRC before committing */
1453 sd->state = sd_programming_state;
1454 for (i = 0; i < sizeof(sd->csd); i ++)
1455 if ((sd->csd[i] | sd_csd_rw_mask[i]) !=
1456 (sd->data[i] | sd_csd_rw_mask[i]))
1457 sd->card_status |= CID_CSD_OVERWRITE;
1458
1459 /* Copy flag (OTP) & Permanent write protect */
1460 if (sd->csd[14] & ~sd->data[14] & 0x60)
1461 sd->card_status |= CID_CSD_OVERWRITE;
1462
1463 if (!(sd->card_status & CID_CSD_OVERWRITE))
1464 for (i = 0; i < sizeof(sd->csd); i ++) {
1465 sd->csd[i] |= sd_csd_rw_mask[i];
1466 sd->csd[i] &= sd->data[i];
1467 }
1468 /* Bzzzzzzztt .... Operation complete. */
1469 sd->state = sd_transfer_state;
1470 }
1471 break;
1472
1473 case 42: /* CMD42: LOCK_UNLOCK */
1474 sd->data[sd->data_offset ++] = value;
1475 if (sd->data_offset >= sd->blk_len) {
1476 /* TODO: Check CRC before committing */
1477 sd->state = sd_programming_state;
1478 sd_lock_command(sd);
1479 /* Bzzzzzzztt .... Operation complete. */
1480 sd->state = sd_transfer_state;
1481 }
1482 break;
1483
1484 case 56: /* CMD56: GEN_CMD */
1485 sd->data[sd->data_offset ++] = value;
1486 if (sd->data_offset >= sd->blk_len) {
1487 APP_WRITE_BLOCK(sd->data_start, sd->data_offset);
1488 sd->state = sd_transfer_state;
1489 }
1490 break;
1491
1492 default:
1493 fprintf(stderr, "sd_write_data: unknown command\n");
1494 break;
1495 }
1496 }
1497
1498 uint8_t sd_read_data(SDState *sd)
1499 {
1500 /* TODO: Append CRCs */
1501 uint8_t ret;
1502
1503 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1504 return 0x00;
1505
1506 if (sd->state != sd_sendingdata_state) {
1507 fprintf(stderr, "sd_read_data: not in Sending-Data state\n");
1508 return 0x00;
1509 }
1510
1511 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1512 return 0x00;
1513
1514 switch (sd->current_cmd) {
1515 case 6: /* CMD6: SWITCH_FUNCTION */
1516 ret = sd->data[sd->data_offset ++];
1517
1518 if (sd->data_offset >= 64)
1519 sd->state = sd_transfer_state;
1520 break;
1521
1522 case 9: /* CMD9: SEND_CSD */
1523 case 10: /* CMD10: SEND_CID */
1524 ret = sd->data[sd->data_offset ++];
1525
1526 if (sd->data_offset >= 16)
1527 sd->state = sd_transfer_state;
1528 break;
1529
1530 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
1531 if (sd->data_offset == 0)
1532 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1533 ret = sd->data[sd->data_offset ++];
1534
1535 if (sd->data_offset >= sd->blk_len) {
1536 sd->data_start += sd->blk_len;
1537 sd->data_offset = 0;
1538 if (sd->data_start + sd->blk_len > sd->size) {
1539 sd->card_status |= ADDRESS_ERROR;
1540 break;
1541 }
1542 }
1543 break;
1544
1545 case 13: /* ACMD13: SD_STATUS */
1546 ret = sd->sd_status[sd->data_offset ++];
1547
1548 if (sd->data_offset >= sizeof(sd->sd_status))
1549 sd->state = sd_transfer_state;
1550 break;
1551
1552 case 17: /* CMD17: READ_SINGLE_BLOCK */
1553 if (sd->data_offset == 0)
1554 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1555 ret = sd->data[sd->data_offset ++];
1556
1557 if (sd->data_offset >= sd->blk_len)
1558 sd->state = sd_transfer_state;
1559 break;
1560
1561 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
1562 if (sd->data_offset == 0)
1563 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1564 ret = sd->data[sd->data_offset ++];
1565
1566 if (sd->data_offset >= sd->blk_len) {
1567 sd->data_start += sd->blk_len;
1568 sd->data_offset = 0;
1569 if (sd->data_start + sd->blk_len > sd->size) {
1570 sd->card_status |= ADDRESS_ERROR;
1571 break;
1572 }
1573 }
1574 break;
1575
1576 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1577 ret = sd->data[sd->data_offset ++];
1578
1579 if (sd->data_offset >= 4)
1580 sd->state = sd_transfer_state;
1581 break;
1582
1583 case 30: /* CMD30: SEND_WRITE_PROT */
1584 ret = sd->data[sd->data_offset ++];
1585
1586 if (sd->data_offset >= 4)
1587 sd->state = sd_transfer_state;
1588 break;
1589
1590 case 51: /* ACMD51: SEND_SCR */
1591 ret = sd->scr[sd->data_offset ++];
1592
1593 if (sd->data_offset >= sizeof(sd->scr))
1594 sd->state = sd_transfer_state;
1595 break;
1596
1597 case 56: /* CMD56: GEN_CMD */
1598 if (sd->data_offset == 0)
1599 APP_READ_BLOCK(sd->data_start, sd->blk_len);
1600 ret = sd->data[sd->data_offset ++];
1601
1602 if (sd->data_offset >= sd->blk_len)
1603 sd->state = sd_transfer_state;
1604 break;
1605
1606 default:
1607 fprintf(stderr, "sd_read_data: unknown command\n");
1608 return 0x00;
1609 }
1610
1611 return ret;
1612 }
1613
1614 int sd_data_ready(SDState *sd)
1615 {
1616 return sd->state == sd_sendingdata_state;
1617 }
1618
1619 void sd_enable(SDState *sd, int enable)
1620 {
1621 sd->enable = enable;
1622 }
Samsung s3c2440 and arm920t support for the mini2440 dev board