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[S3C] Make s3c aware of 2440s
[qemu/mini2440.git] / hw / sd.c
blobfa1c02cf0e13ec098aa6ed5fe71db0fd68d2f9b0
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 BLOCK_SIZE (1 << (HWBLOCK_SHIFT))
246 #define SECTOR_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT))
247 #define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT))
248
249 static const uint8_t sd_csd_rw_mask[16] = {
250 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
251 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe,
252 };
253
254 static void sd_set_csd(SDState *sd, uint32_t size)
255 {
256 uint32_t csize = (size >> (CMULT_SHIFT + HWBLOCK_SHIFT)) - 1;
257 uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1;
258 uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1;
259
260 sd->csd[0] = 0x00; /* CSD structure */
261 sd->csd[1] = 0x26; /* Data read access-time-1 */
262 sd->csd[2] = 0x00; /* Data read access-time-2 */
263 sd->csd[3] = 0x5a; /* Max. data transfer rate */
264 sd->csd[4] = 0x5f; /* Card Command Classes */
265 sd->csd[5] = 0x50 | /* Max. read data block length */
266 HWBLOCK_SHIFT;
267 sd->csd[6] = 0xe0 | /* Partial block for read allowed */
268 ((csize >> 10) & 0x03);
269 sd->csd[7] = 0x00 | /* Device size */
270 ((csize >> 2) & 0xff);
271 sd->csd[8] = 0x3f | /* Max. read current */
272 ((csize << 6) & 0xc0);
273 sd->csd[9] = 0xfc | /* Max. write current */
274 ((CMULT_SHIFT - 2) >> 1);
275 sd->csd[10] = 0x40 | /* Erase sector size */
276 (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1);
277 sd->csd[11] = 0x00 | /* Write protect group size */
278 ((sectsize << 7) & 0x80) | wpsize;
279 sd->csd[12] = 0x90 | /* Write speed factor */
280 (HWBLOCK_SHIFT >> 2);
281 sd->csd[13] = 0x20 | /* Max. write data block length */
282 ((HWBLOCK_SHIFT << 6) & 0xc0);
283 sd->csd[14] = 0x00; /* File format group */
284 sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1;
285 }
286
287 static void sd_set_rca(SDState *sd)
288 {
289 sd->rca += 0x4567;
290 }
291
292 #define CARD_STATUS_A 0x02004100
293 #define CARD_STATUS_B 0x00c01e00
294 #define CARD_STATUS_C 0xfd39a028
295
296 static void sd_set_cardstatus(SDState *sd)
297 {
298 sd->card_status = 0x00000100;
299 }
300
301 static void sd_set_sdstatus(SDState *sd)
302 {
303 memset(sd->sd_status, 0, 64);
304 }
305
306 static int sd_req_crc_validate(struct sd_request_s *req)
307 {
308 uint8_t buffer[5];
309 buffer[0] = 0x40 | req->cmd;
310 buffer[1] = (req->arg >> 24) & 0xff;
311 buffer[2] = (req->arg >> 16) & 0xff;
312 buffer[3] = (req->arg >> 8) & 0xff;
313 buffer[4] = (req->arg >> 0) & 0xff;
314 return 0;
315 return sd_crc7(buffer, 5) != req->crc; /* TODO */
316 }
317
318 static void sd_response_r1_make(SDState *sd,
319 uint8_t *response, uint32_t last_status)
320 {
321 uint32_t mask = CARD_STATUS_B ^ ILLEGAL_COMMAND;
322 uint32_t status;
323
324 status = (sd->card_status & ~mask) | (last_status & mask);
325 sd->card_status &= ~CARD_STATUS_C | APP_CMD;
326
327 response[0] = (status >> 24) & 0xff;
328 response[1] = (status >> 16) & 0xff;
329 response[2] = (status >> 8) & 0xff;
330 response[3] = (status >> 0) & 0xff;
331 }
332
333 static void sd_response_r3_make(SDState *sd, uint8_t *response)
334 {
335 response[0] = (sd->ocr >> 24) & 0xff;
336 response[1] = (sd->ocr >> 16) & 0xff;
337 response[2] = (sd->ocr >> 8) & 0xff;
338 response[3] = (sd->ocr >> 0) & 0xff;
339 }
340
341 static void sd_response_r6_make(SDState *sd, uint8_t *response)
342 {
343 uint16_t arg;
344 uint16_t status;
345
346 arg = sd->rca;
347 status = ((sd->card_status >> 8) & 0xc000) |
348 ((sd->card_status >> 6) & 0x2000) |
349 (sd->card_status & 0x1fff);
350
351 response[0] = (arg >> 8) & 0xff;
352 response[1] = arg & 0xff;
353 response[2] = (status >> 8) & 0xff;
354 response[3] = status & 0xff;
355 }
356
357 static void sd_response_r7_make(SDState *sd, uint8_t *response)
358 {
359 response[0] = (sd->vhs >> 24) & 0xff;
360 response[1] = (sd->vhs >> 16) & 0xff;
361 response[2] = (sd->vhs >> 8) & 0xff;
362 response[3] = (sd->vhs >> 0) & 0xff;
363 }
364
365 static void sd_reset(SDState *sd, BlockDriverState *bdrv)
366 {
367 uint32_t size;
368 uint64_t sect;
369
370 bdrv_get_geometry(bdrv, &sect);
371 sect <<= 9;
372
373 if (sect > 0x40000000)
374 size = 0x40000000; /* 1 gig */
375 else
376 size = sect + 1;
377
378 sect = (size >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)) + 1;
379
380 sd->state = sd_idle_state;
381 sd->rca = 0x0000;
382 sd_set_ocr(sd);
383 sd_set_scr(sd);
384 sd_set_cid(sd);
385 sd_set_csd(sd, size);
386 sd_set_cardstatus(sd);
387 sd_set_sdstatus(sd);
388
389 sd->bdrv = bdrv;
390
391 if (sd->wp_groups)
392 qemu_free(sd->wp_groups);
393 sd->wp_switch = bdrv_is_read_only(bdrv);
394 sd->wp_groups = (int *) qemu_mallocz(sizeof(int) * sect);
395 memset(sd->function_group, 0, sizeof(int) * 6);
396 sd->erase_start = 0;
397 sd->erase_end = 0;
398 sd->size = size;
399 sd->blk_len = 0x200;
400 sd->pwd_len = 0;
401 }
402
403 static void sd_cardchange(void *opaque)
404 {
405 SDState *sd = opaque;
406 qemu_set_irq(sd->inserted_cb, bdrv_is_inserted(sd->bdrv));
407 if (bdrv_is_inserted(sd->bdrv)) {
408 sd_reset(sd, sd->bdrv);
409 qemu_set_irq(sd->readonly_cb, sd->wp_switch);
410 }
411 }
412
413 /* We do not model the chip select pin, so allow the board to select
414 whether card should be in SSI or MMC/SD mode. It is also up to the
415 board to ensure that ssi transfers only occur when the chip select
416 is asserted. */
417 SDState *sd_init(BlockDriverState *bs, int is_spi)
418 {
419 SDState *sd;
420
421 sd = (SDState *) qemu_mallocz(sizeof(SDState));
422 sd->buf = qemu_memalign(512, 512);
423 sd->spi = is_spi;
424 sd->enable = 1;
425 sd_reset(sd, bs);
426 bdrv_set_change_cb(sd->bdrv, sd_cardchange, sd);
427 return sd;
428 }
429
430 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert)
431 {
432 sd->readonly_cb = readonly;
433 sd->inserted_cb = insert;
434 qemu_set_irq(readonly, bdrv_is_read_only(sd->bdrv));
435 qemu_set_irq(insert, bdrv_is_inserted(sd->bdrv));
436 }
437
438 static void sd_erase(SDState *sd)
439 {
440 int i, start, end;
441 if (!sd->erase_start || !sd->erase_end) {
442 sd->card_status |= ERASE_SEQ_ERROR;
443 return;
444 }
445
446 start = sd->erase_start >>
447 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
448 end = sd->erase_end >>
449 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
450 sd->erase_start = 0;
451 sd->erase_end = 0;
452 sd->csd[14] |= 0x40;
453
454 for (i = start; i <= end; i ++)
455 if (sd->wp_groups[i])
456 sd->card_status |= WP_ERASE_SKIP;
457 }
458
459 static uint32_t sd_wpbits(SDState *sd, uint32_t addr)
460 {
461 uint32_t i, wpnum;
462 uint32_t ret = 0;
463
464 wpnum = addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT);
465
466 for (i = 0; i < 32; i ++, wpnum ++, addr += WPGROUP_SIZE)
467 if (addr < sd->size && sd->wp_groups[wpnum])
468 ret |= (1 << i);
469
470 return ret;
471 }
472
473 static void sd_function_switch(SDState *sd, uint32_t arg)
474 {
475 int i, mode, new_func, crc;
476 mode = !!(arg & 0x80000000);
477
478 sd->data[0] = 0x00; /* Maximum current consumption */
479 sd->data[1] = 0x01;
480 sd->data[2] = 0x80; /* Supported group 6 functions */
481 sd->data[3] = 0x01;
482 sd->data[4] = 0x80; /* Supported group 5 functions */
483 sd->data[5] = 0x01;
484 sd->data[6] = 0x80; /* Supported group 4 functions */
485 sd->data[7] = 0x01;
486 sd->data[8] = 0x80; /* Supported group 3 functions */
487 sd->data[9] = 0x01;
488 sd->data[10] = 0x80; /* Supported group 2 functions */
489 sd->data[11] = 0x43;
490 sd->data[12] = 0x80; /* Supported group 1 functions */
491 sd->data[13] = 0x03;
492 for (i = 0; i < 6; i ++) {
493 new_func = (arg >> (i * 4)) & 0x0f;
494 if (mode && new_func != 0x0f)
495 sd->function_group[i] = new_func;
496 sd->data[14 + (i >> 1)] = new_func << ((i * 4) & 4);
497 }
498 memset(&sd->data[17], 0, 47);
499 crc = sd_crc16(sd->data, 64);
500 sd->data[65] = crc >> 8;
501 sd->data[66] = crc & 0xff;
502 }
503
504 static inline int sd_wp_addr(SDState *sd, uint32_t addr)
505 {
506 return sd->wp_groups[addr >>
507 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)];
508 }
509
510 static void sd_lock_command(SDState *sd)
511 {
512 int erase, lock, clr_pwd, set_pwd, pwd_len;
513 erase = !!(sd->data[0] & 0x08);
514 lock = sd->data[0] & 0x04;
515 clr_pwd = sd->data[0] & 0x02;
516 set_pwd = sd->data[0] & 0x01;
517
518 if (sd->blk_len > 1)
519 pwd_len = sd->data[1];
520 else
521 pwd_len = 0;
522
523 if (erase) {
524 if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 ||
525 set_pwd || clr_pwd || lock || sd->wp_switch ||
526 (sd->csd[14] & 0x20)) {
527 sd->card_status |= LOCK_UNLOCK_FAILED;
528 return;
529 }
530 memset(sd->wp_groups, 0, sizeof(int) * (sd->size >>
531 (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)));
532 sd->csd[14] &= ~0x10;
533 sd->card_status &= ~CARD_IS_LOCKED;
534 sd->pwd_len = 0;
535 /* Erasing the entire card here! */
536 fprintf(stderr, "SD: Card force-erased by CMD42\n");
537 return;
538 }
539
540 if (sd->blk_len < 2 + pwd_len ||
541 pwd_len <= sd->pwd_len ||
542 pwd_len > sd->pwd_len + 16) {
543 sd->card_status |= LOCK_UNLOCK_FAILED;
544 return;
545 }
546
547 if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) {
548 sd->card_status |= LOCK_UNLOCK_FAILED;
549 return;
550 }
551
552 pwd_len -= sd->pwd_len;
553 if ((pwd_len && !set_pwd) ||
554 (clr_pwd && (set_pwd || lock)) ||
555 (lock && !sd->pwd_len && !set_pwd) ||
556 (!set_pwd && !clr_pwd &&
557 (((sd->card_status & CARD_IS_LOCKED) && lock) ||
558 (!(sd->card_status & CARD_IS_LOCKED) && !lock)))) {
559 sd->card_status |= LOCK_UNLOCK_FAILED;
560 return;
561 }
562
563 if (set_pwd) {
564 memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len);
565 sd->pwd_len = pwd_len;
566 }
567
568 if (clr_pwd) {
569 sd->pwd_len = 0;
570 }
571
572 if (lock)
573 sd->card_status |= CARD_IS_LOCKED;
574 else
575 sd->card_status &= ~CARD_IS_LOCKED;
576 }
577
578 static sd_rsp_type_t sd_normal_command(SDState *sd,
579 struct sd_request_s req)
580 {
581 uint32_t rca = 0x0000;
582
583 if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
584 rca = req.arg >> 16;
585
586 DPRINTF("CMD%d 0x%08x state %d\n", req.cmd, req.arg, sd->state);
587 switch (req.cmd) {
588 /* Basic commands (Class 0 and Class 1) */
589 case 0: /* CMD0: GO_IDLE_STATE */
590 switch (sd->state) {
591 case sd_inactive_state:
592 return sd->spi ? sd_r1 : sd_r0;
593
594 default:
595 sd->state = sd_idle_state;
596 sd_reset(sd, sd->bdrv);
597 return sd->spi ? sd_r1 : sd_r0;
598 }
599 break;
600
601 case 1: /* CMD1: SEND_OP_CMD */
602 if (!sd->spi)
603 goto bad_cmd;
604
605 sd->state = sd_transfer_state;
606 return sd_r1;
607
608 case 2: /* CMD2: ALL_SEND_CID */
609 if (sd->spi)
610 goto bad_cmd;
611 switch (sd->state) {
612 case sd_ready_state:
613 sd->state = sd_identification_state;
614 return sd_r2_i;
615
616 default:
617 break;
618 }
619 break;
620
621 case 3: /* CMD3: SEND_RELATIVE_ADDR */
622 if (sd->spi)
623 goto bad_cmd;
624 switch (sd->state) {
625 case sd_identification_state:
626 case sd_standby_state:
627 sd->state = sd_standby_state;
628 sd_set_rca(sd);
629 return sd_r6;
630
631 default:
632 break;
633 }
634 break;
635
636 case 4: /* CMD4: SEND_DSR */
637 if (sd->spi)
638 goto bad_cmd;
639 switch (sd->state) {
640 case sd_standby_state:
641 break;
642
643 default:
644 break;
645 }
646 break;
647
648 case 6: /* CMD6: SWITCH_FUNCTION */
649 if (sd->spi)
650 goto bad_cmd;
651 switch (sd->mode) {
652 case sd_data_transfer_mode:
653 sd_function_switch(sd, req.arg);
654 sd->state = sd_sendingdata_state;
655 sd->data_start = 0;
656 sd->data_offset = 0;
657 return sd_r1;
658
659 default:
660 break;
661 }
662 break;
663
664 case 7: /* CMD7: SELECT/DESELECT_CARD */
665 if (sd->spi)
666 goto bad_cmd;
667 switch (sd->state) {
668 case sd_standby_state:
669 if (sd->rca != rca)
670 return sd_r0;
671
672 sd->state = sd_transfer_state;
673 return sd_r1b;
674
675 case sd_transfer_state:
676 case sd_sendingdata_state:
677 if (sd->rca == rca)
678 break;
679
680 sd->state = sd_standby_state;
681 return sd_r1b;
682
683 case sd_disconnect_state:
684 if (sd->rca != rca)
685 return sd_r0;
686
687 sd->state = sd_programming_state;
688 return sd_r1b;
689
690 case sd_programming_state:
691 if (sd->rca == rca)
692 break;
693
694 sd->state = sd_disconnect_state;
695 return sd_r1b;
696
697 default:
698 break;
699 }
700 break;
701
702 case 8: /* CMD8: SEND_IF_COND */
703 /* Physical Layer Specification Version 2.00 command */
704 switch (sd->state) {
705 case sd_idle_state:
706 sd->vhs = 0;
707
708 /* No response if not exactly one VHS bit is set. */
709 if (!(req.arg >> 8) || (req.arg >> ffs(req.arg & ~0xff)))
710 return sd->spi ? sd_r7 : sd_r0;
711
712 /* Accept. */
713 sd->vhs = req.arg;
714 return sd_r7;
715
716 default:
717 break;
718 }
719 break;
720
721 case 9: /* CMD9: SEND_CSD */
722 switch (sd->state) {
723 case sd_standby_state:
724 if (sd->rca != rca)
725 return sd_r0;
726
727 return sd_r2_s;
728
729 case sd_transfer_state:
730 if (!sd->spi)
731 break;
732 sd->state = sd_sendingdata_state;
733 memcpy(sd->data, sd->csd, 16);
734 sd->data_start = req.arg;
735 sd->data_offset = 0;
736 return sd_r1;
737
738 default:
739 break;
740 }
741 break;
742
743 case 10: /* CMD10: SEND_CID */
744 switch (sd->state) {
745 case sd_standby_state:
746 if (sd->rca != rca)
747 return sd_r0;
748
749 return sd_r2_i;
750
751 case sd_transfer_state:
752 if (!sd->spi)
753 break;
754 sd->state = sd_sendingdata_state;
755 memcpy(sd->data, sd->cid, 16);
756 sd->data_start = req.arg;
757 sd->data_offset = 0;
758 return sd_r1;
759
760 default:
761 break;
762 }
763 break;
764
765 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
766 if (sd->spi)
767 goto bad_cmd;
768 switch (sd->state) {
769 case sd_transfer_state:
770 sd->state = sd_sendingdata_state;
771 sd->data_start = req.arg;
772 sd->data_offset = 0;
773
774 if (sd->data_start + sd->blk_len > sd->size)
775 sd->card_status |= ADDRESS_ERROR;
776 return sd_r0;
777
778 default:
779 break;
780 }
781 break;
782
783 case 12: /* CMD12: STOP_TRANSMISSION */
784 switch (sd->state) {
785 case sd_sendingdata_state:
786 sd->state = sd_transfer_state;
787 return sd_r1b;
788
789 case sd_receivingdata_state:
790 sd->state = sd_programming_state;
791 /* Bzzzzzzztt .... Operation complete. */
792 sd->state = sd_transfer_state;
793 return sd_r1b;
794
795 default:
796 break;
797 }
798 break;
799
800 case 13: /* CMD13: SEND_STATUS */
801 switch (sd->mode) {
802 case sd_data_transfer_mode:
803 if (sd->rca != rca)
804 return sd_r0;
805
806 return sd_r1;
807
808 default:
809 break;
810 }
811 break;
812
813 case 15: /* CMD15: GO_INACTIVE_STATE */
814 if (sd->spi)
815 goto bad_cmd;
816 switch (sd->mode) {
817 case sd_data_transfer_mode:
818 if (sd->rca != rca)
819 return sd_r0;
820
821 sd->state = sd_inactive_state;
822 return sd_r0;
823
824 default:
825 break;
826 }
827 break;
828
829 /* Block read commands (Classs 2) */
830 case 16: /* CMD16: SET_BLOCKLEN */
831 switch (sd->state) {
832 case sd_transfer_state:
833 if (req.arg > (1 << HWBLOCK_SHIFT))
834 sd->card_status |= BLOCK_LEN_ERROR;
835 else
836 sd->blk_len = req.arg;
837
838 return sd_r1;
839
840 default:
841 break;
842 }
843 break;
844
845 case 17: /* CMD17: READ_SINGLE_BLOCK */
846 switch (sd->state) {
847 case sd_transfer_state:
848 sd->state = sd_sendingdata_state;
849 sd->data_start = req.arg;
850 sd->data_offset = 0;
851
852 if (sd->data_start + sd->blk_len > sd->size)
853 sd->card_status |= ADDRESS_ERROR;
854 return sd_r1;
855
856 default:
857 break;
858 }
859 break;
860
861 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
862 switch (sd->state) {
863 case sd_transfer_state:
864 sd->state = sd_sendingdata_state;
865 sd->data_start = req.arg;
866 sd->data_offset = 0;
867
868 if (sd->data_start + sd->blk_len > sd->size)
869 sd->card_status |= ADDRESS_ERROR;
870 return sd_r1;
871
872 default:
873 break;
874 }
875 break;
876
877 /* Block write commands (Class 4) */
878 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
879 if (sd->spi)
880 goto unimplemented_cmd;
881 switch (sd->state) {
882 case sd_transfer_state:
883 /* Writing in SPI mode not implemented. */
884 if (sd->spi)
885 break;
886 sd->state = sd_receivingdata_state;
887 sd->data_start = req.arg;
888 sd->data_offset = 0;
889 sd->blk_written = 0;
890
891 if (sd->data_start + sd->blk_len > sd->size)
892 sd->card_status |= ADDRESS_ERROR;
893 if (sd_wp_addr(sd, sd->data_start))
894 sd->card_status |= WP_VIOLATION;
895 if (sd->csd[14] & 0x30)
896 sd->card_status |= WP_VIOLATION;
897 return sd_r1;
898
899 default:
900 break;
901 }
902 break;
903
904 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
905 if (sd->spi)
906 goto unimplemented_cmd;
907 switch (sd->state) {
908 case sd_transfer_state:
909 /* Writing in SPI mode not implemented. */
910 if (sd->spi)
911 break;
912 sd->state = sd_receivingdata_state;
913 sd->data_start = req.arg;
914 sd->data_offset = 0;
915 sd->blk_written = 0;
916
917 if (sd->data_start + sd->blk_len > sd->size)
918 sd->card_status |= ADDRESS_ERROR;
919 if (sd_wp_addr(sd, sd->data_start))
920 sd->card_status |= WP_VIOLATION;
921 if (sd->csd[14] & 0x30)
922 sd->card_status |= WP_VIOLATION;
923 return sd_r1;
924
925 default:
926 break;
927 }
928 break;
929
930 case 26: /* CMD26: PROGRAM_CID */
931 if (sd->spi)
932 goto bad_cmd;
933 switch (sd->state) {
934 case sd_transfer_state:
935 sd->state = sd_receivingdata_state;
936 sd->data_start = 0;
937 sd->data_offset = 0;
938 return sd_r1;
939
940 default:
941 break;
942 }
943 break;
944
945 case 27: /* CMD27: PROGRAM_CSD */
946 if (sd->spi)
947 goto unimplemented_cmd;
948 switch (sd->state) {
949 case sd_transfer_state:
950 sd->state = sd_receivingdata_state;
951 sd->data_start = 0;
952 sd->data_offset = 0;
953 return sd_r1;
954
955 default:
956 break;
957 }
958 break;
959
960 /* Write protection (Class 6) */
961 case 28: /* CMD28: SET_WRITE_PROT */
962 switch (sd->state) {
963 case sd_transfer_state:
964 if (req.arg >= sd->size) {
965 sd->card_status = ADDRESS_ERROR;
966 return sd_r1b;
967 }
968
969 sd->state = sd_programming_state;
970 sd->wp_groups[req.arg >> (HWBLOCK_SHIFT +
971 SECTOR_SHIFT + WPGROUP_SHIFT)] = 1;
972 /* Bzzzzzzztt .... Operation complete. */
973 sd->state = sd_transfer_state;
974 return sd_r1b;
975
976 default:
977 break;
978 }
979 break;
980
981 case 29: /* CMD29: CLR_WRITE_PROT */
982 switch (sd->state) {
983 case sd_transfer_state:
984 if (req.arg >= sd->size) {
985 sd->card_status = ADDRESS_ERROR;
986 return sd_r1b;
987 }
988
989 sd->state = sd_programming_state;
990 sd->wp_groups[req.arg >> (HWBLOCK_SHIFT +
991 SECTOR_SHIFT + WPGROUP_SHIFT)] = 0;
992 /* Bzzzzzzztt .... Operation complete. */
993 sd->state = sd_transfer_state;
994 return sd_r1b;
995
996 default:
997 break;
998 }
999 break;
1000
1001 case 30: /* CMD30: SEND_WRITE_PROT */
1002 switch (sd->state) {
1003 case sd_transfer_state:
1004 sd->state = sd_sendingdata_state;
1005 *(uint32_t *) sd->data = sd_wpbits(sd, req.arg);
1006 sd->data_start = req.arg;
1007 sd->data_offset = 0;
1008 return sd_r1b;
1009
1010 default:
1011 break;
1012 }
1013 break;
1014
1015 /* Erase commands (Class 5) */
1016 case 32: /* CMD32: ERASE_WR_BLK_START */
1017 switch (sd->state) {
1018 case sd_transfer_state:
1019 sd->erase_start = req.arg;
1020 return sd_r1;
1021
1022 default:
1023 break;
1024 }
1025 break;
1026
1027 case 33: /* CMD33: ERASE_WR_BLK_END */
1028 switch (sd->state) {
1029 case sd_transfer_state:
1030 sd->erase_end = req.arg;
1031 return sd_r1;
1032
1033 default:
1034 break;
1035 }
1036 break;
1037
1038 case 38: /* CMD38: ERASE */
1039 switch (sd->state) {
1040 case sd_transfer_state:
1041 if (sd->csd[14] & 0x30) {
1042 sd->card_status |= WP_VIOLATION;
1043 return sd_r1b;
1044 }
1045
1046 sd->state = sd_programming_state;
1047 sd_erase(sd);
1048 /* Bzzzzzzztt .... Operation complete. */
1049 sd->state = sd_transfer_state;
1050 return sd_r1b;
1051
1052 default:
1053 break;
1054 }
1055 break;
1056
1057 /* Lock card commands (Class 7) */
1058 case 42: /* CMD42: LOCK_UNLOCK */
1059 if (sd->spi)
1060 goto unimplemented_cmd;
1061 switch (sd->state) {
1062 case sd_transfer_state:
1063 sd->state = sd_receivingdata_state;
1064 sd->data_start = 0;
1065 sd->data_offset = 0;
1066 return sd_r1;
1067
1068 default:
1069 break;
1070 }
1071 break;
1072
1073 /* Application specific commands (Class 8) */
1074 case 55: /* CMD55: APP_CMD */
1075 if (sd->rca != rca)
1076 return sd_r0;
1077
1078 sd->card_status |= APP_CMD;
1079 return sd_r1;
1080
1081 case 56: /* CMD56: GEN_CMD */
1082 fprintf(stderr, "SD: GEN_CMD 0x%08x\n", req.arg);
1083
1084 switch (sd->state) {
1085 case sd_transfer_state:
1086 sd->data_offset = 0;
1087 if (req.arg & 1)
1088 sd->state = sd_sendingdata_state;
1089 else
1090 sd->state = sd_receivingdata_state;
1091 return sd_r1;
1092
1093 default:
1094 break;
1095 }
1096 break;
1097
1098 default:
1099 bad_cmd:
1100 sd->card_status |= ILLEGAL_COMMAND;
1101
1102 fprintf(stderr, "SD: Unknown CMD%i\n", req.cmd);
1103 return sd_r0;
1104
1105 unimplemented_cmd:
1106 /* Commands that are recognised but not yet implemented in SPI mode. */
1107 sd->card_status |= ILLEGAL_COMMAND;
1108 fprintf(stderr, "SD: CMD%i not implemented in SPI mode\n", req.cmd);
1109 return sd_r0;
1110 }
1111
1112 sd->card_status |= ILLEGAL_COMMAND;
1113 fprintf(stderr, "SD: CMD%i in a wrong state\n", req.cmd);
1114 return sd_r0;
1115 }
1116
1117 static sd_rsp_type_t sd_app_command(SDState *sd,
1118 struct sd_request_s req) {
1119 uint32_t rca;
1120
1121 if (sd_cmd_type[req.cmd] == sd_ac || sd_cmd_type[req.cmd] == sd_adtc)
1122 rca = req.arg >> 16;
1123
1124 DPRINTF("ACMD%d 0x%08x\n", req.cmd, req.arg);
1125 switch (req.cmd) {
1126 case 6: /* ACMD6: SET_BUS_WIDTH */
1127 switch (sd->state) {
1128 case sd_transfer_state:
1129 sd->sd_status[0] &= 0x3f;
1130 sd->sd_status[0] |= (req.arg & 0x03) << 6;
1131 return sd_r1;
1132
1133 default:
1134 break;
1135 }
1136 break;
1137
1138 case 13: /* ACMD13: SD_STATUS */
1139 switch (sd->state) {
1140 case sd_transfer_state:
1141 sd->data_start = 0;
1142 sd->data_offset = 0;
1143 return sd_r1;
1144
1145 default:
1146 break;
1147 }
1148 break;
1149
1150 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1151 switch (sd->state) {
1152 case sd_transfer_state:
1153 *(uint32_t *) sd->data = sd->blk_written;
1154
1155 sd->data_start = 0;
1156 sd->data_offset = 0;
1157 return sd_r1;
1158
1159 default:
1160 break;
1161 }
1162 break;
1163
1164 case 23: /* ACMD23: SET_WR_BLK_ERASE_COUNT */
1165 switch (sd->state) {
1166 case sd_transfer_state:
1167 return sd_r1;
1168
1169 default:
1170 break;
1171 }
1172 break;
1173
1174 case 41: /* ACMD41: SD_APP_OP_COND */
1175 if (sd->spi) {
1176 /* SEND_OP_CMD */
1177 sd->state = sd_transfer_state;
1178 return sd_r1;
1179 }
1180 switch (sd->state) {
1181 case sd_idle_state:
1182 /* We accept any voltage. 10000 V is nothing. */
1183 if (req.arg)
1184 sd->state = sd_ready_state;
1185
1186 return sd_r3;
1187
1188 default:
1189 break;
1190 }
1191 break;
1192
1193 case 42: /* ACMD42: SET_CLR_CARD_DETECT */
1194 switch (sd->state) {
1195 case sd_transfer_state:
1196 /* Bringing in the 50KOhm pull-up resistor... Done. */
1197 return sd_r1;
1198
1199 default:
1200 break;
1201 }
1202 break;
1203
1204 case 51: /* ACMD51: SEND_SCR */
1205 switch (sd->state) {
1206 case sd_transfer_state:
1207 sd->state = sd_sendingdata_state;
1208 sd->data_start = 0;
1209 sd->data_offset = 0;
1210 return sd_r1;
1211
1212 default:
1213 break;
1214 }
1215 break;
1216
1217 default:
1218 /* Fall back to standard commands. */
1219 sd->card_status &= ~APP_CMD;
1220 return sd_normal_command(sd, req);
1221 }
1222
1223 fprintf(stderr, "SD: ACMD%i in a wrong state\n", req.cmd);
1224 return sd_r0;
1225 }
1226
1227 int sd_do_command(SDState *sd, struct sd_request_s *req,
1228 uint8_t *response) {
1229 uint32_t last_status = sd->card_status;
1230 sd_rsp_type_t rtype;
1231 int rsplen;
1232
1233 if (!bdrv_is_inserted(sd->bdrv) || !sd->enable) {
1234 return 0;
1235 }
1236
1237 if (sd_req_crc_validate(req)) {
1238 sd->card_status &= ~COM_CRC_ERROR;
1239 return 0;
1240 }
1241
1242 sd->card_status &= ~CARD_STATUS_B;
1243 sd_set_status(sd);
1244
1245 if (last_status & CARD_IS_LOCKED)
1246 if (((last_status & APP_CMD) &&
1247 req->cmd == 41) ||
1248 (!(last_status & APP_CMD) &&
1249 (sd_cmd_class[req->cmd] == 0 ||
1250 sd_cmd_class[req->cmd] == 7 ||
1251 req->cmd == 16 || req->cmd == 55))) {
1252 sd->card_status |= ILLEGAL_COMMAND;
1253 fprintf(stderr, "SD: Card is locked\n");
1254 return 0;
1255 }
1256
1257 if (last_status & APP_CMD) {
1258 rtype = sd_app_command(sd, *req);
1259 sd->card_status &= ~APP_CMD;
1260 } else
1261 rtype = sd_normal_command(sd, *req);
1262
1263 sd->current_cmd = req->cmd;
1264
1265 switch (rtype) {
1266 case sd_r1:
1267 case sd_r1b:
1268 sd_response_r1_make(sd, response, last_status);
1269 rsplen = 4;
1270 break;
1271
1272 case sd_r2_i:
1273 memcpy(response, sd->cid, sizeof(sd->cid));
1274 rsplen = 16;
1275 break;
1276
1277 case sd_r2_s:
1278 memcpy(response, sd->csd, sizeof(sd->csd));
1279 rsplen = 16;
1280 break;
1281
1282 case sd_r3:
1283 sd_response_r3_make(sd, response);
1284 rsplen = 4;
1285 break;
1286
1287 case sd_r6:
1288 sd_response_r6_make(sd, response);
1289 rsplen = 4;
1290 break;
1291
1292 case sd_r7:
1293 sd_response_r7_make(sd, response);
1294 rsplen = 4;
1295 break;
1296
1297 case sd_r0:
1298 default:
1299 rsplen = 0;
1300 break;
1301 }
1302
1303 if (sd->card_status & ILLEGAL_COMMAND)
1304 rsplen = 0;
1305
1306 #ifdef DEBUG_SD
1307 if (rsplen) {
1308 int i;
1309 DPRINTF("Response:");
1310 for (i = 0; i < rsplen; i++)
1311 printf(" %02x", response[i]);
1312 printf(" state %d\n", sd->state);
1313 } else {
1314 DPRINTF("No response %d\n", sd->state);
1315 }
1316 #endif
1317
1318 return rsplen;
1319 }
1320
1321 /* No real need for 64 bit addresses here */
1322 static void sd_blk_read(SDState *sd, uint32_t addr, uint32_t len)
1323 {
1324 uint32_t end = addr + len;
1325
1326 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1327 fprintf(stderr, "sd_blk_read: read error on host side\n");
1328 return;
1329 }
1330
1331 if (end > (addr & ~511) + 512) {
1332 memcpy(sd->data, sd->buf + (addr & 511), 512 - (addr & 511));
1333
1334 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
1335 fprintf(stderr, "sd_blk_read: read error on host side\n");
1336 return;
1337 }
1338 memcpy(sd->data + 512 - (addr & 511), sd->buf, end & 511);
1339 } else
1340 memcpy(sd->data, sd->buf + (addr & 511), len);
1341 }
1342
1343 static void sd_blk_write(SDState *sd, uint32_t addr, uint32_t len)
1344 {
1345 uint32_t end = addr + len;
1346
1347 if ((addr & 511) || len < 512)
1348 if (!sd->bdrv || bdrv_read(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1349 fprintf(stderr, "sd_blk_write: read error on host side\n");
1350 return;
1351 }
1352
1353 if (end > (addr & ~511) + 512) {
1354 memcpy(sd->buf + (addr & 511), sd->data, 512 - (addr & 511));
1355 if (bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1) {
1356 fprintf(stderr, "sd_blk_write: write error on host side\n");
1357 return;
1358 }
1359
1360 if (bdrv_read(sd->bdrv, end >> 9, sd->buf, 1) == -1) {
1361 fprintf(stderr, "sd_blk_write: read error on host side\n");
1362 return;
1363 }
1364 memcpy(sd->buf, sd->data + 512 - (addr & 511), end & 511);
1365 if (bdrv_write(sd->bdrv, end >> 9, sd->buf, 1) == -1)
1366 fprintf(stderr, "sd_blk_write: write error on host side\n");
1367 } else {
1368 memcpy(sd->buf + (addr & 511), sd->data, len);
1369 if (!sd->bdrv || bdrv_write(sd->bdrv, addr >> 9, sd->buf, 1) == -1)
1370 fprintf(stderr, "sd_blk_write: write error on host side\n");
1371 }
1372 }
1373
1374 #define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len)
1375 #define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len)
1376 #define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len)
1377 #define APP_WRITE_BLOCK(a, len)
1378
1379 void sd_write_data(SDState *sd, uint8_t value)
1380 {
1381 int i;
1382
1383 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1384 return;
1385
1386 if (sd->state != sd_receivingdata_state) {
1387 fprintf(stderr, "sd_write_data: not in Receiving-Data state\n");
1388 return;
1389 }
1390
1391 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1392 return;
1393
1394 switch (sd->current_cmd) {
1395 case 24: /* CMD24: WRITE_SINGLE_BLOCK */
1396 sd->data[sd->data_offset ++] = value;
1397 if (sd->data_offset >= sd->blk_len) {
1398 /* TODO: Check CRC before committing */
1399 sd->state = sd_programming_state;
1400 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1401 sd->blk_written ++;
1402 sd->csd[14] |= 0x40;
1403 /* Bzzzzzzztt .... Operation complete. */
1404 sd->state = sd_transfer_state;
1405 }
1406 break;
1407
1408 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */
1409 sd->data[sd->data_offset ++] = value;
1410 if (sd->data_offset >= sd->blk_len) {
1411 /* TODO: Check CRC before committing */
1412 sd->state = sd_programming_state;
1413 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset);
1414 sd->blk_written ++;
1415 sd->data_start += sd->blk_len;
1416 sd->data_offset = 0;
1417 if (sd->data_start + sd->blk_len > sd->size) {
1418 sd->card_status |= ADDRESS_ERROR;
1419 break;
1420 }
1421 if (sd_wp_addr(sd, sd->data_start)) {
1422 sd->card_status |= WP_VIOLATION;
1423 break;
1424 }
1425 sd->csd[14] |= 0x40;
1426
1427 /* Bzzzzzzztt .... Operation complete. */
1428 sd->state = sd_receivingdata_state;
1429 }
1430 break;
1431
1432 case 26: /* CMD26: PROGRAM_CID */
1433 sd->data[sd->data_offset ++] = value;
1434 if (sd->data_offset >= sizeof(sd->cid)) {
1435 /* TODO: Check CRC before committing */
1436 sd->state = sd_programming_state;
1437 for (i = 0; i < sizeof(sd->cid); i ++)
1438 if ((sd->cid[i] | 0x00) != sd->data[i])
1439 sd->card_status |= CID_CSD_OVERWRITE;
1440
1441 if (!(sd->card_status & CID_CSD_OVERWRITE))
1442 for (i = 0; i < sizeof(sd->cid); i ++) {
1443 sd->cid[i] |= 0x00;
1444 sd->cid[i] &= sd->data[i];
1445 }
1446 /* Bzzzzzzztt .... Operation complete. */
1447 sd->state = sd_transfer_state;
1448 }
1449 break;
1450
1451 case 27: /* CMD27: PROGRAM_CSD */
1452 sd->data[sd->data_offset ++] = value;
1453 if (sd->data_offset >= sizeof(sd->csd)) {
1454 /* TODO: Check CRC before committing */
1455 sd->state = sd_programming_state;
1456 for (i = 0; i < sizeof(sd->csd); i ++)
1457 if ((sd->csd[i] | sd_csd_rw_mask[i]) !=
1458 (sd->data[i] | sd_csd_rw_mask[i]))
1459 sd->card_status |= CID_CSD_OVERWRITE;
1460
1461 /* Copy flag (OTP) & Permanent write protect */
1462 if (sd->csd[14] & ~sd->data[14] & 0x60)
1463 sd->card_status |= CID_CSD_OVERWRITE;
1464
1465 if (!(sd->card_status & CID_CSD_OVERWRITE))
1466 for (i = 0; i < sizeof(sd->csd); i ++) {
1467 sd->csd[i] |= sd_csd_rw_mask[i];
1468 sd->csd[i] &= sd->data[i];
1469 }
1470 /* Bzzzzzzztt .... Operation complete. */
1471 sd->state = sd_transfer_state;
1472 }
1473 break;
1474
1475 case 42: /* CMD42: LOCK_UNLOCK */
1476 sd->data[sd->data_offset ++] = value;
1477 if (sd->data_offset >= sd->blk_len) {
1478 /* TODO: Check CRC before committing */
1479 sd->state = sd_programming_state;
1480 sd_lock_command(sd);
1481 /* Bzzzzzzztt .... Operation complete. */
1482 sd->state = sd_transfer_state;
1483 }
1484 break;
1485
1486 case 56: /* CMD56: GEN_CMD */
1487 sd->data[sd->data_offset ++] = value;
1488 if (sd->data_offset >= sd->blk_len) {
1489 APP_WRITE_BLOCK(sd->data_start, sd->data_offset);
1490 sd->state = sd_transfer_state;
1491 }
1492 break;
1493
1494 default:
1495 fprintf(stderr, "sd_write_data: unknown command\n");
1496 break;
1497 }
1498 }
1499
1500 uint8_t sd_read_data(SDState *sd)
1501 {
1502 /* TODO: Append CRCs */
1503 uint8_t ret;
1504
1505 if (!sd->bdrv || !bdrv_is_inserted(sd->bdrv) || !sd->enable)
1506 return 0x00;
1507
1508 if (sd->state != sd_sendingdata_state) {
1509 fprintf(stderr, "sd_read_data: not in Sending-Data state\n");
1510 return 0x00;
1511 }
1512
1513 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION))
1514 return 0x00;
1515
1516 switch (sd->current_cmd) {
1517 case 6: /* CMD6: SWITCH_FUNCTION */
1518 ret = sd->data[sd->data_offset ++];
1519
1520 if (sd->data_offset >= 64)
1521 sd->state = sd_transfer_state;
1522 break;
1523
1524 case 9: /* CMD9: SEND_CSD */
1525 case 10: /* CMD10: SEND_CID */
1526 ret = sd->data[sd->data_offset ++];
1527
1528 if (sd->data_offset >= 16)
1529 sd->state = sd_transfer_state;
1530 break;
1531
1532 case 11: /* CMD11: READ_DAT_UNTIL_STOP */
1533 if (sd->data_offset == 0)
1534 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1535 ret = sd->data[sd->data_offset ++];
1536
1537 if (sd->data_offset >= sd->blk_len) {
1538 sd->data_start += sd->blk_len;
1539 sd->data_offset = 0;
1540 if (sd->data_start + sd->blk_len > sd->size) {
1541 sd->card_status |= ADDRESS_ERROR;
1542 break;
1543 }
1544 }
1545 break;
1546
1547 case 13: /* ACMD13: SD_STATUS */
1548 ret = sd->sd_status[sd->data_offset ++];
1549
1550 if (sd->data_offset >= sizeof(sd->sd_status))
1551 sd->state = sd_transfer_state;
1552 break;
1553
1554 case 17: /* CMD17: READ_SINGLE_BLOCK */
1555 if (sd->data_offset == 0)
1556 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1557 ret = sd->data[sd->data_offset ++];
1558
1559 if (sd->data_offset >= sd->blk_len)
1560 sd->state = sd_transfer_state;
1561 break;
1562
1563 case 18: /* CMD18: READ_MULTIPLE_BLOCK */
1564 if (sd->data_offset == 0)
1565 BLK_READ_BLOCK(sd->data_start, sd->blk_len);
1566 ret = sd->data[sd->data_offset ++];
1567
1568 if (sd->data_offset >= sd->blk_len) {
1569 sd->data_start += sd->blk_len;
1570 sd->data_offset = 0;
1571 if (sd->data_start + sd->blk_len > sd->size) {
1572 sd->card_status |= ADDRESS_ERROR;
1573 break;
1574 }
1575 }
1576 break;
1577
1578 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */
1579 ret = sd->data[sd->data_offset ++];
1580
1581 if (sd->data_offset >= 4)
1582 sd->state = sd_transfer_state;
1583 break;
1584
1585 case 30: /* CMD30: SEND_WRITE_PROT */
1586 ret = sd->data[sd->data_offset ++];
1587
1588 if (sd->data_offset >= 4)
1589 sd->state = sd_transfer_state;
1590 break;
1591
1592 case 51: /* ACMD51: SEND_SCR */
1593 ret = sd->scr[sd->data_offset ++];
1594
1595 if (sd->data_offset >= sizeof(sd->scr))
1596 sd->state = sd_transfer_state;
1597 break;
1598
1599 case 56: /* CMD56: GEN_CMD */
1600 if (sd->data_offset == 0)
1601 APP_READ_BLOCK(sd->data_start, sd->blk_len);
1602 ret = sd->data[sd->data_offset ++];
1603
1604 if (sd->data_offset >= sd->blk_len)
1605 sd->state = sd_transfer_state;
1606 break;
1607
1608 default:
1609 fprintf(stderr, "sd_read_data: unknown command\n");
1610 return 0x00;
1611 }
1612
1613 return ret;
1614 }
1615
1616 int sd_data_ready(SDState *sd)
1617 {
1618 return sd->state == sd_sendingdata_state;
1619 }
1620
1621 void sd_enable(SDState *sd, int enable)
1622 {
1623 sd->enable = enable;
1624 }
Samsung s3c2440 and arm920t support for the mini2440 dev board