1 /* 2 * SD Memory Card emulation as defined in the "SD Memory Card Physical 3 * layer specification, Version 2.00." 4 * 5 * Copyright (c) 2006 Andrzej Zaborowski <balrog@zabor.org> 6 * Copyright (c) 2007 CodeSourcery 7 * Copyright (c) 2018 Philippe Mathieu-Daudé <f4bug@amsat.org> 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in 17 * the documentation and/or other materials provided with the 18 * distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' 21 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 22 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A 23 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 28 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 29 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 #include "qemu/osdep.h" 34 #include "qemu/units.h" 35 #include "qemu/cutils.h" 36 #include "hw/irq.h" 37 #include "hw/registerfields.h" 38 #include "sysemu/block-backend.h" 39 #include "hw/sd/sd.h" 40 #include "hw/sd/sdcard_legacy.h" 41 #include "migration/vmstate.h" 42 #include "qapi/error.h" 43 #include "qemu/bitmap.h" 44 #include "hw/qdev-properties.h" 45 #include "hw/qdev-properties-system.h" 46 #include "qemu/error-report.h" 47 #include "qemu/timer.h" 48 #include "qemu/log.h" 49 #include "qemu/module.h" 50 #include "sdmmc-internal.h" 51 #include "trace.h" 52 53 //#define DEBUG_SD 1 54 55 #define SDSC_MAX_CAPACITY (2 * GiB) 56 57 #define INVALID_ADDRESS UINT32_MAX 58 59 typedef enum { 60 sd_r0 = 0, /* no response */ 61 sd_r1, /* normal response command */ 62 sd_r2_i, /* CID register */ 63 sd_r2_s, /* CSD register */ 64 sd_r3, /* OCR register */ 65 sd_r6 = 6, /* Published RCA response */ 66 sd_r7, /* Operating voltage */ 67 sd_r1b = -1, 68 sd_illegal = -2, 69 } sd_rsp_type_t; 70 71 enum SDCardModes { 72 sd_inactive, 73 sd_card_identification_mode, 74 sd_data_transfer_mode, 75 }; 76 77 enum SDCardStates { 78 sd_inactive_state = -1, 79 sd_idle_state = 0, 80 sd_ready_state, 81 sd_identification_state, 82 sd_standby_state, 83 sd_transfer_state, 84 sd_sendingdata_state, 85 sd_receivingdata_state, 86 sd_programming_state, 87 sd_disconnect_state, 88 }; 89 90 struct SDState { 91 DeviceState parent_obj; 92 93 /* If true, created by sd_init() for a non-qdevified caller */ 94 /* TODO purge them with fire */ 95 bool me_no_qdev_me_kill_mammoth_with_rocks; 96 97 /* SD Memory Card Registers */ 98 uint32_t ocr; 99 uint8_t scr[8]; 100 uint8_t cid[16]; 101 uint8_t csd[16]; 102 uint16_t rca; 103 uint32_t card_status; 104 uint8_t sd_status[64]; 105 106 /* Static properties */ 107 108 uint8_t spec_version; 109 BlockBackend *blk; 110 bool spi; 111 112 /* Runtime changeables */ 113 114 uint32_t mode; /* current card mode, one of SDCardModes */ 115 int32_t state; /* current card state, one of SDCardStates */ 116 uint32_t vhs; 117 bool wp_switch; 118 unsigned long *wp_group_bmap; 119 int32_t wp_group_bits; 120 uint64_t size; 121 uint32_t blk_len; 122 uint32_t multi_blk_cnt; 123 uint32_t erase_start; 124 uint32_t erase_end; 125 uint8_t pwd[16]; 126 uint32_t pwd_len; 127 uint8_t function_group[6]; 128 uint8_t current_cmd; 129 /* True if we will handle the next command as an ACMD. Note that this does 130 * *not* track the APP_CMD status bit! 131 */ 132 bool expecting_acmd; 133 uint32_t blk_written; 134 uint64_t data_start; 135 uint32_t data_offset; 136 uint8_t data[512]; 137 qemu_irq readonly_cb; 138 qemu_irq inserted_cb; 139 QEMUTimer *ocr_power_timer; 140 const char *proto_name; 141 bool enable; 142 uint8_t dat_lines; 143 bool cmd_line; 144 }; 145 146 static void sd_realize(DeviceState *dev, Error **errp); 147 148 static const char *sd_state_name(enum SDCardStates state) 149 { 150 static const char *state_name[] = { 151 [sd_idle_state] = "idle", 152 [sd_ready_state] = "ready", 153 [sd_identification_state] = "identification", 154 [sd_standby_state] = "standby", 155 [sd_transfer_state] = "transfer", 156 [sd_sendingdata_state] = "sendingdata", 157 [sd_receivingdata_state] = "receivingdata", 158 [sd_programming_state] = "programming", 159 [sd_disconnect_state] = "disconnect", 160 }; 161 if (state == sd_inactive_state) { 162 return "inactive"; 163 } 164 assert(state < ARRAY_SIZE(state_name)); 165 return state_name[state]; 166 } 167 168 static const char *sd_response_name(sd_rsp_type_t rsp) 169 { 170 static const char *response_name[] = { 171 [sd_r0] = "RESP#0 (no response)", 172 [sd_r1] = "RESP#1 (normal cmd)", 173 [sd_r2_i] = "RESP#2 (CID reg)", 174 [sd_r2_s] = "RESP#2 (CSD reg)", 175 [sd_r3] = "RESP#3 (OCR reg)", 176 [sd_r6] = "RESP#6 (RCA)", 177 [sd_r7] = "RESP#7 (operating voltage)", 178 }; 179 if (rsp == sd_illegal) { 180 return "ILLEGAL RESP"; 181 } 182 if (rsp == sd_r1b) { 183 rsp = sd_r1; 184 } 185 assert(rsp < ARRAY_SIZE(response_name)); 186 return response_name[rsp]; 187 } 188 189 static uint8_t sd_get_dat_lines(SDState *sd) 190 { 191 return sd->enable ? sd->dat_lines : 0; 192 } 193 194 static bool sd_get_cmd_line(SDState *sd) 195 { 196 return sd->enable ? sd->cmd_line : false; 197 } 198 199 static void sd_set_voltage(SDState *sd, uint16_t millivolts) 200 { 201 trace_sdcard_set_voltage(millivolts); 202 203 switch (millivolts) { 204 case 3001 ... 3600: /* SD_VOLTAGE_3_3V */ 205 case 2001 ... 3000: /* SD_VOLTAGE_3_0V */ 206 break; 207 default: 208 qemu_log_mask(LOG_GUEST_ERROR, "SD card voltage not supported: %.3fV", 209 millivolts / 1000.f); 210 } 211 } 212 213 static void sd_set_mode(SDState *sd) 214 { 215 switch (sd->state) { 216 case sd_inactive_state: 217 sd->mode = sd_inactive; 218 break; 219 220 case sd_idle_state: 221 case sd_ready_state: 222 case sd_identification_state: 223 sd->mode = sd_card_identification_mode; 224 break; 225 226 case sd_standby_state: 227 case sd_transfer_state: 228 case sd_sendingdata_state: 229 case sd_receivingdata_state: 230 case sd_programming_state: 231 case sd_disconnect_state: 232 sd->mode = sd_data_transfer_mode; 233 break; 234 } 235 } 236 237 static const sd_cmd_type_t sd_cmd_type[SDMMC_CMD_MAX] = { 238 sd_bc, sd_none, sd_bcr, sd_bcr, sd_none, sd_none, sd_none, sd_ac, 239 sd_bcr, sd_ac, sd_ac, sd_adtc, sd_ac, sd_ac, sd_none, sd_ac, 240 /* 16 */ 241 sd_ac, sd_adtc, sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, 242 sd_adtc, sd_adtc, sd_adtc, sd_adtc, sd_ac, sd_ac, sd_adtc, sd_none, 243 /* 32 */ 244 sd_ac, sd_ac, sd_none, sd_none, sd_none, sd_none, sd_ac, sd_none, 245 sd_none, sd_none, sd_bc, sd_none, sd_none, sd_none, sd_none, sd_none, 246 /* 48 */ 247 sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_ac, 248 sd_adtc, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, sd_none, 249 }; 250 251 static const int sd_cmd_class[SDMMC_CMD_MAX] = { 252 0, 0, 0, 0, 0, 9, 10, 0, 0, 0, 0, 1, 0, 0, 0, 0, 253 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 6, 6, 6, 6, 254 5, 5, 10, 10, 10, 10, 5, 9, 9, 9, 7, 7, 7, 7, 7, 7, 255 7, 7, 10, 7, 9, 9, 9, 8, 8, 10, 8, 8, 8, 8, 8, 8, 256 }; 257 258 static uint8_t sd_crc7(const void *message, size_t width) 259 { 260 int i, bit; 261 uint8_t shift_reg = 0x00; 262 const uint8_t *msg = (const uint8_t *)message; 263 264 for (i = 0; i < width; i ++, msg ++) 265 for (bit = 7; bit >= 0; bit --) { 266 shift_reg <<= 1; 267 if ((shift_reg >> 7) ^ ((*msg >> bit) & 1)) 268 shift_reg ^= 0x89; 269 } 270 271 return shift_reg; 272 } 273 274 #define OCR_POWER_DELAY_NS 500000 /* 0.5ms */ 275 276 FIELD(OCR, VDD_VOLTAGE_WINDOW, 0, 24) 277 FIELD(OCR, VDD_VOLTAGE_WIN_LO, 0, 8) 278 FIELD(OCR, DUAL_VOLTAGE_CARD, 7, 1) 279 FIELD(OCR, VDD_VOLTAGE_WIN_HI, 8, 16) 280 FIELD(OCR, ACCEPT_SWITCH_1V8, 24, 1) /* Only UHS-I */ 281 FIELD(OCR, UHS_II_CARD, 29, 1) /* Only UHS-II */ 282 FIELD(OCR, CARD_CAPACITY, 30, 1) /* 0:SDSC, 1:SDHC/SDXC */ 283 FIELD(OCR, CARD_POWER_UP, 31, 1) 284 285 #define ACMD41_ENQUIRY_MASK 0x00ffffff 286 #define ACMD41_R3_MASK (R_OCR_VDD_VOLTAGE_WIN_HI_MASK \ 287 | R_OCR_ACCEPT_SWITCH_1V8_MASK \ 288 | R_OCR_UHS_II_CARD_MASK \ 289 | R_OCR_CARD_CAPACITY_MASK \ 290 | R_OCR_CARD_POWER_UP_MASK) 291 292 static void sd_ocr_powerup(void *opaque) 293 { 294 SDState *sd = opaque; 295 296 trace_sdcard_powerup(); 297 assert(!FIELD_EX32(sd->ocr, OCR, CARD_POWER_UP)); 298 299 /* card power-up OK */ 300 sd->ocr = FIELD_DP32(sd->ocr, OCR, CARD_POWER_UP, 1); 301 302 if (sd->size > SDSC_MAX_CAPACITY) { 303 sd->ocr = FIELD_DP32(sd->ocr, OCR, CARD_CAPACITY, 1); 304 } 305 } 306 307 static void sd_set_ocr(SDState *sd) 308 { 309 /* All voltages OK */ 310 sd->ocr = R_OCR_VDD_VOLTAGE_WIN_HI_MASK; 311 312 if (sd->spi) { 313 /* 314 * We don't need to emulate power up sequence in SPI-mode. 315 * Thus, the card's power up status bit should be set to 1 when reset. 316 * The card's capacity status bit should also be set if SD card size 317 * is larger than 2GB for SDHC support. 318 */ 319 sd_ocr_powerup(sd); 320 } 321 } 322 323 static void sd_set_scr(SDState *sd) 324 { 325 sd->scr[0] = 0 << 4; /* SCR structure version 1.0 */ 326 if (sd->spec_version == SD_PHY_SPECv1_10_VERS) { 327 sd->scr[0] |= 1; /* Spec Version 1.10 */ 328 } else { 329 sd->scr[0] |= 2; /* Spec Version 2.00 or Version 3.0X */ 330 } 331 sd->scr[1] = (2 << 4) /* SDSC Card (Security Version 1.01) */ 332 | 0b0101; /* 1-bit or 4-bit width bus modes */ 333 sd->scr[2] = 0x00; /* Extended Security is not supported. */ 334 if (sd->spec_version >= SD_PHY_SPECv3_01_VERS) { 335 sd->scr[2] |= 1 << 7; /* Spec Version 3.0X */ 336 } 337 sd->scr[3] = 0x00; 338 /* reserved for manufacturer usage */ 339 sd->scr[4] = 0x00; 340 sd->scr[5] = 0x00; 341 sd->scr[6] = 0x00; 342 sd->scr[7] = 0x00; 343 } 344 345 #define MID 0xaa 346 #define OID "XY" 347 #define PNM "QEMU!" 348 #define PRV 0x01 349 #define MDT_YR 2006 350 #define MDT_MON 2 351 352 static void sd_set_cid(SDState *sd) 353 { 354 sd->cid[0] = MID; /* Fake card manufacturer ID (MID) */ 355 sd->cid[1] = OID[0]; /* OEM/Application ID (OID) */ 356 sd->cid[2] = OID[1]; 357 sd->cid[3] = PNM[0]; /* Fake product name (PNM) */ 358 sd->cid[4] = PNM[1]; 359 sd->cid[5] = PNM[2]; 360 sd->cid[6] = PNM[3]; 361 sd->cid[7] = PNM[4]; 362 sd->cid[8] = PRV; /* Fake product revision (PRV) */ 363 sd->cid[9] = 0xde; /* Fake serial number (PSN) */ 364 sd->cid[10] = 0xad; 365 sd->cid[11] = 0xbe; 366 sd->cid[12] = 0xef; 367 sd->cid[13] = 0x00 | /* Manufacture date (MDT) */ 368 ((MDT_YR - 2000) / 10); 369 sd->cid[14] = ((MDT_YR % 10) << 4) | MDT_MON; 370 sd->cid[15] = (sd_crc7(sd->cid, 15) << 1) | 1; 371 } 372 373 #define HWBLOCK_SHIFT 9 /* 512 bytes */ 374 #define SECTOR_SHIFT 5 /* 16 kilobytes */ 375 #define WPGROUP_SHIFT 7 /* 2 megs */ 376 #define CMULT_SHIFT 9 /* 512 times HWBLOCK_SIZE */ 377 #define WPGROUP_SIZE (1 << (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT)) 378 379 static const uint8_t sd_csd_rw_mask[16] = { 380 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 381 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, 0xfe, 382 }; 383 384 static void sd_set_csd(SDState *sd, uint64_t size) 385 { 386 int hwblock_shift = HWBLOCK_SHIFT; 387 uint32_t csize; 388 uint32_t sectsize = (1 << (SECTOR_SHIFT + 1)) - 1; 389 uint32_t wpsize = (1 << (WPGROUP_SHIFT + 1)) - 1; 390 391 /* To indicate 2 GiB card, BLOCK_LEN shall be 1024 bytes */ 392 if (size == SDSC_MAX_CAPACITY) { 393 hwblock_shift += 1; 394 } 395 csize = (size >> (CMULT_SHIFT + hwblock_shift)) - 1; 396 397 if (size <= SDSC_MAX_CAPACITY) { /* Standard Capacity SD */ 398 sd->csd[0] = 0x00; /* CSD structure */ 399 sd->csd[1] = 0x26; /* Data read access-time-1 */ 400 sd->csd[2] = 0x00; /* Data read access-time-2 */ 401 sd->csd[3] = 0x32; /* Max. data transfer rate: 25 MHz */ 402 sd->csd[4] = 0x5f; /* Card Command Classes */ 403 sd->csd[5] = 0x50 | /* Max. read data block length */ 404 hwblock_shift; 405 sd->csd[6] = 0xe0 | /* Partial block for read allowed */ 406 ((csize >> 10) & 0x03); 407 sd->csd[7] = 0x00 | /* Device size */ 408 ((csize >> 2) & 0xff); 409 sd->csd[8] = 0x3f | /* Max. read current */ 410 ((csize << 6) & 0xc0); 411 sd->csd[9] = 0xfc | /* Max. write current */ 412 ((CMULT_SHIFT - 2) >> 1); 413 sd->csd[10] = 0x40 | /* Erase sector size */ 414 (((CMULT_SHIFT - 2) << 7) & 0x80) | (sectsize >> 1); 415 sd->csd[11] = 0x00 | /* Write protect group size */ 416 ((sectsize << 7) & 0x80) | wpsize; 417 sd->csd[12] = 0x90 | /* Write speed factor */ 418 (hwblock_shift >> 2); 419 sd->csd[13] = 0x20 | /* Max. write data block length */ 420 ((hwblock_shift << 6) & 0xc0); 421 sd->csd[14] = 0x00; /* File format group */ 422 } else { /* SDHC */ 423 size /= 512 * KiB; 424 size -= 1; 425 sd->csd[0] = 0x40; 426 sd->csd[1] = 0x0e; 427 sd->csd[2] = 0x00; 428 sd->csd[3] = 0x32; 429 sd->csd[4] = 0x5b; 430 sd->csd[5] = 0x59; 431 sd->csd[6] = 0x00; 432 sd->csd[7] = (size >> 16) & 0xff; 433 sd->csd[8] = (size >> 8) & 0xff; 434 sd->csd[9] = (size & 0xff); 435 sd->csd[10] = 0x7f; 436 sd->csd[11] = 0x80; 437 sd->csd[12] = 0x0a; 438 sd->csd[13] = 0x40; 439 sd->csd[14] = 0x00; 440 } 441 sd->csd[15] = (sd_crc7(sd->csd, 15) << 1) | 1; 442 } 443 444 static void sd_set_rca(SDState *sd) 445 { 446 sd->rca += 0x4567; 447 } 448 449 FIELD(CSR, AKE_SEQ_ERROR, 3, 1) 450 FIELD(CSR, APP_CMD, 5, 1) 451 FIELD(CSR, FX_EVENT, 6, 1) 452 FIELD(CSR, READY_FOR_DATA, 8, 1) 453 FIELD(CSR, CURRENT_STATE, 9, 4) 454 FIELD(CSR, ERASE_RESET, 13, 1) 455 FIELD(CSR, CARD_ECC_DISABLED, 14, 1) 456 FIELD(CSR, WP_ERASE_SKIP, 15, 1) 457 FIELD(CSR, CSD_OVERWRITE, 16, 1) 458 FIELD(CSR, DEFERRED_RESPONSE, 17, 1) 459 FIELD(CSR, ERROR, 19, 1) 460 FIELD(CSR, CC_ERROR, 20, 1) 461 FIELD(CSR, CARD_ECC_FAILED, 21, 1) 462 FIELD(CSR, ILLEGAL_COMMAND, 22, 1) 463 FIELD(CSR, COM_CRC_ERROR, 23, 1) 464 FIELD(CSR, LOCK_UNLOCK_FAILED, 24, 1) 465 FIELD(CSR, CARD_IS_LOCKED, 25, 1) 466 FIELD(CSR, WP_VIOLATION, 26, 1) 467 FIELD(CSR, ERASE_PARAM, 27, 1) 468 FIELD(CSR, ERASE_SEQ_ERROR, 28, 1) 469 FIELD(CSR, BLOCK_LEN_ERROR, 29, 1) 470 FIELD(CSR, ADDRESS_ERROR, 30, 1) 471 FIELD(CSR, OUT_OF_RANGE, 31, 1) 472 473 /* Card status bits, split by clear condition: 474 * A : According to the card current state 475 * B : Always related to the previous command 476 * C : Cleared by read 477 */ 478 #define CARD_STATUS_A (R_CSR_READY_FOR_DATA_MASK \ 479 | R_CSR_CARD_ECC_DISABLED_MASK \ 480 | R_CSR_CARD_IS_LOCKED_MASK) 481 #define CARD_STATUS_B (R_CSR_CURRENT_STATE_MASK \ 482 | R_CSR_ILLEGAL_COMMAND_MASK \ 483 | R_CSR_COM_CRC_ERROR_MASK) 484 #define CARD_STATUS_C (R_CSR_AKE_SEQ_ERROR_MASK \ 485 | R_CSR_APP_CMD_MASK \ 486 | R_CSR_ERASE_RESET_MASK \ 487 | R_CSR_WP_ERASE_SKIP_MASK \ 488 | R_CSR_CSD_OVERWRITE_MASK \ 489 | R_CSR_ERROR_MASK \ 490 | R_CSR_CC_ERROR_MASK \ 491 | R_CSR_CARD_ECC_FAILED_MASK \ 492 | R_CSR_LOCK_UNLOCK_FAILED_MASK \ 493 | R_CSR_WP_VIOLATION_MASK \ 494 | R_CSR_ERASE_PARAM_MASK \ 495 | R_CSR_ERASE_SEQ_ERROR_MASK \ 496 | R_CSR_BLOCK_LEN_ERROR_MASK \ 497 | R_CSR_ADDRESS_ERROR_MASK \ 498 | R_CSR_OUT_OF_RANGE_MASK) 499 500 static void sd_set_cardstatus(SDState *sd) 501 { 502 sd->card_status = 0x00000100; 503 } 504 505 static void sd_set_sdstatus(SDState *sd) 506 { 507 memset(sd->sd_status, 0, 64); 508 } 509 510 static int sd_req_crc_validate(SDRequest *req) 511 { 512 uint8_t buffer[5]; 513 buffer[0] = 0x40 | req->cmd; 514 stl_be_p(&buffer[1], req->arg); 515 return 0; 516 return sd_crc7(buffer, 5) != req->crc; /* TODO */ 517 } 518 519 static void sd_response_r1_make(SDState *sd, uint8_t *response) 520 { 521 stl_be_p(response, sd->card_status); 522 523 /* Clear the "clear on read" status bits */ 524 sd->card_status &= ~CARD_STATUS_C; 525 } 526 527 static void sd_response_r3_make(SDState *sd, uint8_t *response) 528 { 529 stl_be_p(response, sd->ocr & ACMD41_R3_MASK); 530 } 531 532 static void sd_response_r6_make(SDState *sd, uint8_t *response) 533 { 534 uint16_t status; 535 536 status = ((sd->card_status >> 8) & 0xc000) | 537 ((sd->card_status >> 6) & 0x2000) | 538 (sd->card_status & 0x1fff); 539 sd->card_status &= ~(CARD_STATUS_C & 0xc81fff); 540 stw_be_p(response + 0, sd->rca); 541 stw_be_p(response + 2, status); 542 } 543 544 static void sd_response_r7_make(SDState *sd, uint8_t *response) 545 { 546 stl_be_p(response, sd->vhs); 547 } 548 549 static inline uint64_t sd_addr_to_wpnum(uint64_t addr) 550 { 551 return addr >> (HWBLOCK_SHIFT + SECTOR_SHIFT + WPGROUP_SHIFT); 552 } 553 554 static void sd_reset(DeviceState *dev) 555 { 556 SDState *sd = SD_CARD(dev); 557 uint64_t size; 558 uint64_t sect; 559 560 trace_sdcard_reset(); 561 if (sd->blk) { 562 blk_get_geometry(sd->blk, §); 563 } else { 564 sect = 0; 565 } 566 size = sect << 9; 567 568 sect = sd_addr_to_wpnum(size) + 1; 569 570 sd->state = sd_idle_state; 571 sd->rca = 0x0000; 572 sd->size = size; 573 sd_set_ocr(sd); 574 sd_set_scr(sd); 575 sd_set_cid(sd); 576 sd_set_csd(sd, size); 577 sd_set_cardstatus(sd); 578 sd_set_sdstatus(sd); 579 580 g_free(sd->wp_group_bmap); 581 sd->wp_switch = sd->blk ? !blk_is_writable(sd->blk) : false; 582 sd->wp_group_bits = sect; 583 sd->wp_group_bmap = bitmap_new(sd->wp_group_bits); 584 memset(sd->function_group, 0, sizeof(sd->function_group)); 585 sd->erase_start = INVALID_ADDRESS; 586 sd->erase_end = INVALID_ADDRESS; 587 sd->blk_len = 0x200; 588 sd->pwd_len = 0; 589 sd->expecting_acmd = false; 590 sd->dat_lines = 0xf; 591 sd->cmd_line = true; 592 sd->multi_blk_cnt = 0; 593 } 594 595 static bool sd_get_inserted(SDState *sd) 596 { 597 return sd->blk && blk_is_inserted(sd->blk); 598 } 599 600 static bool sd_get_readonly(SDState *sd) 601 { 602 return sd->wp_switch; 603 } 604 605 static void sd_cardchange(void *opaque, bool load, Error **errp) 606 { 607 SDState *sd = opaque; 608 DeviceState *dev = DEVICE(sd); 609 SDBus *sdbus; 610 bool inserted = sd_get_inserted(sd); 611 bool readonly = sd_get_readonly(sd); 612 613 if (inserted) { 614 trace_sdcard_inserted(readonly); 615 sd_reset(dev); 616 } else { 617 trace_sdcard_ejected(); 618 } 619 620 if (sd->me_no_qdev_me_kill_mammoth_with_rocks) { 621 qemu_set_irq(sd->inserted_cb, inserted); 622 if (inserted) { 623 qemu_set_irq(sd->readonly_cb, readonly); 624 } 625 } else { 626 sdbus = SD_BUS(qdev_get_parent_bus(dev)); 627 sdbus_set_inserted(sdbus, inserted); 628 if (inserted) { 629 sdbus_set_readonly(sdbus, readonly); 630 } 631 } 632 } 633 634 static const BlockDevOps sd_block_ops = { 635 .change_media_cb = sd_cardchange, 636 }; 637 638 static bool sd_ocr_vmstate_needed(void *opaque) 639 { 640 SDState *sd = opaque; 641 642 /* Include the OCR state (and timer) if it is not yet powered up */ 643 return !FIELD_EX32(sd->ocr, OCR, CARD_POWER_UP); 644 } 645 646 static const VMStateDescription sd_ocr_vmstate = { 647 .name = "sd-card/ocr-state", 648 .version_id = 1, 649 .minimum_version_id = 1, 650 .needed = sd_ocr_vmstate_needed, 651 .fields = (VMStateField[]) { 652 VMSTATE_UINT32(ocr, SDState), 653 VMSTATE_TIMER_PTR(ocr_power_timer, SDState), 654 VMSTATE_END_OF_LIST() 655 }, 656 }; 657 658 static int sd_vmstate_pre_load(void *opaque) 659 { 660 SDState *sd = opaque; 661 662 /* If the OCR state is not included (prior versions, or not 663 * needed), then the OCR must be set as powered up. If the OCR state 664 * is included, this will be replaced by the state restore. 665 */ 666 sd_ocr_powerup(sd); 667 668 return 0; 669 } 670 671 static const VMStateDescription sd_vmstate = { 672 .name = "sd-card", 673 .version_id = 2, 674 .minimum_version_id = 2, 675 .pre_load = sd_vmstate_pre_load, 676 .fields = (VMStateField[]) { 677 VMSTATE_UINT32(mode, SDState), 678 VMSTATE_INT32(state, SDState), 679 VMSTATE_UINT8_ARRAY(cid, SDState, 16), 680 VMSTATE_UINT8_ARRAY(csd, SDState, 16), 681 VMSTATE_UINT16(rca, SDState), 682 VMSTATE_UINT32(card_status, SDState), 683 VMSTATE_PARTIAL_BUFFER(sd_status, SDState, 1), 684 VMSTATE_UINT32(vhs, SDState), 685 VMSTATE_BITMAP(wp_group_bmap, SDState, 0, wp_group_bits), 686 VMSTATE_UINT32(blk_len, SDState), 687 VMSTATE_UINT32(multi_blk_cnt, SDState), 688 VMSTATE_UINT32(erase_start, SDState), 689 VMSTATE_UINT32(erase_end, SDState), 690 VMSTATE_UINT8_ARRAY(pwd, SDState, 16), 691 VMSTATE_UINT32(pwd_len, SDState), 692 VMSTATE_UINT8_ARRAY(function_group, SDState, 6), 693 VMSTATE_UINT8(current_cmd, SDState), 694 VMSTATE_BOOL(expecting_acmd, SDState), 695 VMSTATE_UINT32(blk_written, SDState), 696 VMSTATE_UINT64(data_start, SDState), 697 VMSTATE_UINT32(data_offset, SDState), 698 VMSTATE_UINT8_ARRAY(data, SDState, 512), 699 VMSTATE_UNUSED_V(1, 512), 700 VMSTATE_BOOL(enable, SDState), 701 VMSTATE_END_OF_LIST() 702 }, 703 .subsections = (const VMStateDescription*[]) { 704 &sd_ocr_vmstate, 705 NULL 706 }, 707 }; 708 709 /* Legacy initialization function for use by non-qdevified callers */ 710 SDState *sd_init(BlockBackend *blk, bool is_spi) 711 { 712 Object *obj; 713 DeviceState *dev; 714 SDState *sd; 715 Error *err = NULL; 716 717 obj = object_new(TYPE_SD_CARD); 718 dev = DEVICE(obj); 719 if (!qdev_prop_set_drive_err(dev, "drive", blk, &err)) { 720 error_reportf_err(err, "sd_init failed: "); 721 return NULL; 722 } 723 qdev_prop_set_bit(dev, "spi", is_spi); 724 725 /* 726 * Realizing the device properly would put it into the QOM 727 * composition tree even though it is not plugged into an 728 * appropriate bus. That's a no-no. Hide the device from 729 * QOM/qdev, and call its qdev realize callback directly. 730 */ 731 object_ref(obj); 732 object_unparent(obj); 733 sd_realize(dev, &err); 734 if (err) { 735 error_reportf_err(err, "sd_init failed: "); 736 return NULL; 737 } 738 739 sd = SD_CARD(dev); 740 sd->me_no_qdev_me_kill_mammoth_with_rocks = true; 741 return sd; 742 } 743 744 void sd_set_cb(SDState *sd, qemu_irq readonly, qemu_irq insert) 745 { 746 sd->readonly_cb = readonly; 747 sd->inserted_cb = insert; 748 qemu_set_irq(readonly, sd->blk ? !blk_is_writable(sd->blk) : 0); 749 qemu_set_irq(insert, sd->blk ? blk_is_inserted(sd->blk) : 0); 750 } 751 752 static void sd_blk_read(SDState *sd, uint64_t addr, uint32_t len) 753 { 754 trace_sdcard_read_block(addr, len); 755 if (!sd->blk || blk_pread(sd->blk, addr, sd->data, len) < 0) { 756 fprintf(stderr, "sd_blk_read: read error on host side\n"); 757 } 758 } 759 760 static void sd_blk_write(SDState *sd, uint64_t addr, uint32_t len) 761 { 762 trace_sdcard_write_block(addr, len); 763 if (!sd->blk || blk_pwrite(sd->blk, addr, sd->data, len, 0) < 0) { 764 fprintf(stderr, "sd_blk_write: write error on host side\n"); 765 } 766 } 767 768 #define BLK_READ_BLOCK(a, len) sd_blk_read(sd, a, len) 769 #define BLK_WRITE_BLOCK(a, len) sd_blk_write(sd, a, len) 770 #define APP_READ_BLOCK(a, len) memset(sd->data, 0xec, len) 771 #define APP_WRITE_BLOCK(a, len) 772 773 static void sd_erase(SDState *sd) 774 { 775 uint64_t erase_start = sd->erase_start; 776 uint64_t erase_end = sd->erase_end; 777 bool sdsc = true; 778 uint64_t wpnum; 779 uint64_t erase_addr; 780 int erase_len = 1 << HWBLOCK_SHIFT; 781 782 trace_sdcard_erase(sd->erase_start, sd->erase_end); 783 if (sd->erase_start == INVALID_ADDRESS 784 || sd->erase_end == INVALID_ADDRESS) { 785 sd->card_status |= ERASE_SEQ_ERROR; 786 sd->erase_start = INVALID_ADDRESS; 787 sd->erase_end = INVALID_ADDRESS; 788 return; 789 } 790 791 if (FIELD_EX32(sd->ocr, OCR, CARD_CAPACITY)) { 792 /* High capacity memory card: erase units are 512 byte blocks */ 793 erase_start *= 512; 794 erase_end *= 512; 795 sdsc = false; 796 } 797 798 if (erase_start > sd->size || erase_end > sd->size) { 799 sd->card_status |= OUT_OF_RANGE; 800 sd->erase_start = INVALID_ADDRESS; 801 sd->erase_end = INVALID_ADDRESS; 802 return; 803 } 804 805 sd->erase_start = INVALID_ADDRESS; 806 sd->erase_end = INVALID_ADDRESS; 807 sd->csd[14] |= 0x40; 808 809 memset(sd->data, 0xff, erase_len); 810 for (erase_addr = erase_start; erase_addr <= erase_end; 811 erase_addr += erase_len) { 812 if (sdsc) { 813 /* Only SDSC cards support write protect groups */ 814 wpnum = sd_addr_to_wpnum(erase_addr); 815 assert(wpnum < sd->wp_group_bits); 816 if (test_bit(wpnum, sd->wp_group_bmap)) { 817 sd->card_status |= WP_ERASE_SKIP; 818 continue; 819 } 820 } 821 BLK_WRITE_BLOCK(erase_addr, erase_len); 822 } 823 } 824 825 static uint32_t sd_wpbits(SDState *sd, uint64_t addr) 826 { 827 uint32_t i, wpnum; 828 uint32_t ret = 0; 829 830 wpnum = sd_addr_to_wpnum(addr); 831 832 for (i = 0; i < 32; i++, wpnum++, addr += WPGROUP_SIZE) { 833 if (addr >= sd->size) { 834 /* 835 * If the addresses of the last groups are outside the valid range, 836 * then the corresponding write protection bits shall be set to 0. 837 */ 838 continue; 839 } 840 assert(wpnum < sd->wp_group_bits); 841 if (test_bit(wpnum, sd->wp_group_bmap)) { 842 ret |= (1 << i); 843 } 844 } 845 846 return ret; 847 } 848 849 static void sd_function_switch(SDState *sd, uint32_t arg) 850 { 851 int i, mode, new_func; 852 mode = !!(arg & 0x80000000); 853 854 sd->data[0] = 0x00; /* Maximum current consumption */ 855 sd->data[1] = 0x01; 856 sd->data[2] = 0x80; /* Supported group 6 functions */ 857 sd->data[3] = 0x01; 858 sd->data[4] = 0x80; /* Supported group 5 functions */ 859 sd->data[5] = 0x01; 860 sd->data[6] = 0x80; /* Supported group 4 functions */ 861 sd->data[7] = 0x01; 862 sd->data[8] = 0x80; /* Supported group 3 functions */ 863 sd->data[9] = 0x01; 864 sd->data[10] = 0x80; /* Supported group 2 functions */ 865 sd->data[11] = 0x43; 866 sd->data[12] = 0x80; /* Supported group 1 functions */ 867 sd->data[13] = 0x03; 868 869 memset(&sd->data[14], 0, 3); 870 for (i = 0; i < 6; i ++) { 871 new_func = (arg >> (i * 4)) & 0x0f; 872 if (mode && new_func != 0x0f) 873 sd->function_group[i] = new_func; 874 sd->data[16 - (i >> 1)] |= new_func << ((i % 2) * 4); 875 } 876 memset(&sd->data[17], 0, 47); 877 } 878 879 static inline bool sd_wp_addr(SDState *sd, uint64_t addr) 880 { 881 return test_bit(sd_addr_to_wpnum(addr), sd->wp_group_bmap); 882 } 883 884 static void sd_lock_command(SDState *sd) 885 { 886 int erase, lock, clr_pwd, set_pwd, pwd_len; 887 erase = !!(sd->data[0] & 0x08); 888 lock = sd->data[0] & 0x04; 889 clr_pwd = sd->data[0] & 0x02; 890 set_pwd = sd->data[0] & 0x01; 891 892 if (sd->blk_len > 1) 893 pwd_len = sd->data[1]; 894 else 895 pwd_len = 0; 896 897 if (lock) { 898 trace_sdcard_lock(); 899 } else { 900 trace_sdcard_unlock(); 901 } 902 if (erase) { 903 if (!(sd->card_status & CARD_IS_LOCKED) || sd->blk_len > 1 || 904 set_pwd || clr_pwd || lock || sd->wp_switch || 905 (sd->csd[14] & 0x20)) { 906 sd->card_status |= LOCK_UNLOCK_FAILED; 907 return; 908 } 909 bitmap_zero(sd->wp_group_bmap, sd->wp_group_bits); 910 sd->csd[14] &= ~0x10; 911 sd->card_status &= ~CARD_IS_LOCKED; 912 sd->pwd_len = 0; 913 /* Erasing the entire card here! */ 914 fprintf(stderr, "SD: Card force-erased by CMD42\n"); 915 return; 916 } 917 918 if (sd->blk_len < 2 + pwd_len || 919 pwd_len <= sd->pwd_len || 920 pwd_len > sd->pwd_len + 16) { 921 sd->card_status |= LOCK_UNLOCK_FAILED; 922 return; 923 } 924 925 if (sd->pwd_len && memcmp(sd->pwd, sd->data + 2, sd->pwd_len)) { 926 sd->card_status |= LOCK_UNLOCK_FAILED; 927 return; 928 } 929 930 pwd_len -= sd->pwd_len; 931 if ((pwd_len && !set_pwd) || 932 (clr_pwd && (set_pwd || lock)) || 933 (lock && !sd->pwd_len && !set_pwd) || 934 (!set_pwd && !clr_pwd && 935 (((sd->card_status & CARD_IS_LOCKED) && lock) || 936 (!(sd->card_status & CARD_IS_LOCKED) && !lock)))) { 937 sd->card_status |= LOCK_UNLOCK_FAILED; 938 return; 939 } 940 941 if (set_pwd) { 942 memcpy(sd->pwd, sd->data + 2 + sd->pwd_len, pwd_len); 943 sd->pwd_len = pwd_len; 944 } 945 946 if (clr_pwd) { 947 sd->pwd_len = 0; 948 } 949 950 if (lock) 951 sd->card_status |= CARD_IS_LOCKED; 952 else 953 sd->card_status &= ~CARD_IS_LOCKED; 954 } 955 956 static bool address_in_range(SDState *sd, const char *desc, 957 uint64_t addr, uint32_t length) 958 { 959 if (addr + length > sd->size) { 960 qemu_log_mask(LOG_GUEST_ERROR, 961 "%s offset %"PRIu64" > card %"PRIu64" [%%%u]\n", 962 desc, addr, sd->size, length); 963 sd->card_status |= ADDRESS_ERROR; 964 return false; 965 } 966 return true; 967 } 968 969 static sd_rsp_type_t sd_normal_command(SDState *sd, SDRequest req) 970 { 971 uint32_t rca = 0x0000; 972 uint64_t addr = (sd->ocr & (1 << 30)) ? (uint64_t) req.arg << 9 : req.arg; 973 974 /* CMD55 precedes an ACMD, so we are not interested in tracing it. 975 * However there is no ACMD55, so we want to trace this particular case. 976 */ 977 if (req.cmd != 55 || sd->expecting_acmd) { 978 trace_sdcard_normal_command(sd->proto_name, 979 sd_cmd_name(req.cmd), req.cmd, 980 req.arg, sd_state_name(sd->state)); 981 } 982 983 /* Not interpreting this as an app command */ 984 sd->card_status &= ~APP_CMD; 985 986 if (sd_cmd_type[req.cmd] == sd_ac 987 || sd_cmd_type[req.cmd] == sd_adtc) { 988 rca = req.arg >> 16; 989 } 990 991 /* CMD23 (set block count) must be immediately followed by CMD18 or CMD25 992 * if not, its effects are cancelled */ 993 if (sd->multi_blk_cnt != 0 && !(req.cmd == 18 || req.cmd == 25)) { 994 sd->multi_blk_cnt = 0; 995 } 996 997 if (sd_cmd_class[req.cmd] == 6 && FIELD_EX32(sd->ocr, OCR, CARD_CAPACITY)) { 998 /* Only Standard Capacity cards support class 6 commands */ 999 return sd_illegal; 1000 } 1001 1002 switch (req.cmd) { 1003 /* Basic commands (Class 0 and Class 1) */ 1004 case 0: /* CMD0: GO_IDLE_STATE */ 1005 switch (sd->state) { 1006 case sd_inactive_state: 1007 return sd->spi ? sd_r1 : sd_r0; 1008 1009 default: 1010 sd->state = sd_idle_state; 1011 sd_reset(DEVICE(sd)); 1012 return sd->spi ? sd_r1 : sd_r0; 1013 } 1014 break; 1015 1016 case 1: /* CMD1: SEND_OP_CMD */ 1017 if (!sd->spi) 1018 goto bad_cmd; 1019 1020 sd->state = sd_transfer_state; 1021 return sd_r1; 1022 1023 case 2: /* CMD2: ALL_SEND_CID */ 1024 if (sd->spi) 1025 goto bad_cmd; 1026 switch (sd->state) { 1027 case sd_ready_state: 1028 sd->state = sd_identification_state; 1029 return sd_r2_i; 1030 1031 default: 1032 break; 1033 } 1034 break; 1035 1036 case 3: /* CMD3: SEND_RELATIVE_ADDR */ 1037 if (sd->spi) 1038 goto bad_cmd; 1039 switch (sd->state) { 1040 case sd_identification_state: 1041 case sd_standby_state: 1042 sd->state = sd_standby_state; 1043 sd_set_rca(sd); 1044 return sd_r6; 1045 1046 default: 1047 break; 1048 } 1049 break; 1050 1051 case 4: /* CMD4: SEND_DSR */ 1052 if (sd->spi) 1053 goto bad_cmd; 1054 switch (sd->state) { 1055 case sd_standby_state: 1056 break; 1057 1058 default: 1059 break; 1060 } 1061 break; 1062 1063 case 5: /* CMD5: reserved for SDIO cards */ 1064 return sd_illegal; 1065 1066 case 6: /* CMD6: SWITCH_FUNCTION */ 1067 switch (sd->mode) { 1068 case sd_data_transfer_mode: 1069 sd_function_switch(sd, req.arg); 1070 sd->state = sd_sendingdata_state; 1071 sd->data_start = 0; 1072 sd->data_offset = 0; 1073 return sd_r1; 1074 1075 default: 1076 break; 1077 } 1078 break; 1079 1080 case 7: /* CMD7: SELECT/DESELECT_CARD */ 1081 if (sd->spi) 1082 goto bad_cmd; 1083 switch (sd->state) { 1084 case sd_standby_state: 1085 if (sd->rca != rca) 1086 return sd_r0; 1087 1088 sd->state = sd_transfer_state; 1089 return sd_r1b; 1090 1091 case sd_transfer_state: 1092 case sd_sendingdata_state: 1093 if (sd->rca == rca) 1094 break; 1095 1096 sd->state = sd_standby_state; 1097 return sd_r1b; 1098 1099 case sd_disconnect_state: 1100 if (sd->rca != rca) 1101 return sd_r0; 1102 1103 sd->state = sd_programming_state; 1104 return sd_r1b; 1105 1106 case sd_programming_state: 1107 if (sd->rca == rca) 1108 break; 1109 1110 sd->state = sd_disconnect_state; 1111 return sd_r1b; 1112 1113 default: 1114 break; 1115 } 1116 break; 1117 1118 case 8: /* CMD8: SEND_IF_COND */ 1119 if (sd->spec_version < SD_PHY_SPECv2_00_VERS) { 1120 break; 1121 } 1122 if (sd->state != sd_idle_state) { 1123 break; 1124 } 1125 sd->vhs = 0; 1126 1127 /* No response if not exactly one VHS bit is set. */ 1128 if (!(req.arg >> 8) || (req.arg >> (ctz32(req.arg & ~0xff) + 1))) { 1129 return sd->spi ? sd_r7 : sd_r0; 1130 } 1131 1132 /* Accept. */ 1133 sd->vhs = req.arg; 1134 return sd_r7; 1135 1136 case 9: /* CMD9: SEND_CSD */ 1137 switch (sd->state) { 1138 case sd_standby_state: 1139 if (sd->rca != rca) 1140 return sd_r0; 1141 1142 return sd_r2_s; 1143 1144 case sd_transfer_state: 1145 if (!sd->spi) 1146 break; 1147 sd->state = sd_sendingdata_state; 1148 memcpy(sd->data, sd->csd, 16); 1149 sd->data_start = addr; 1150 sd->data_offset = 0; 1151 return sd_r1; 1152 1153 default: 1154 break; 1155 } 1156 break; 1157 1158 case 10: /* CMD10: SEND_CID */ 1159 switch (sd->state) { 1160 case sd_standby_state: 1161 if (sd->rca != rca) 1162 return sd_r0; 1163 1164 return sd_r2_i; 1165 1166 case sd_transfer_state: 1167 if (!sd->spi) 1168 break; 1169 sd->state = sd_sendingdata_state; 1170 memcpy(sd->data, sd->cid, 16); 1171 sd->data_start = addr; 1172 sd->data_offset = 0; 1173 return sd_r1; 1174 1175 default: 1176 break; 1177 } 1178 break; 1179 1180 case 12: /* CMD12: STOP_TRANSMISSION */ 1181 switch (sd->state) { 1182 case sd_sendingdata_state: 1183 sd->state = sd_transfer_state; 1184 return sd_r1b; 1185 1186 case sd_receivingdata_state: 1187 sd->state = sd_programming_state; 1188 /* Bzzzzzzztt .... Operation complete. */ 1189 sd->state = sd_transfer_state; 1190 return sd_r1b; 1191 1192 default: 1193 break; 1194 } 1195 break; 1196 1197 case 13: /* CMD13: SEND_STATUS */ 1198 switch (sd->mode) { 1199 case sd_data_transfer_mode: 1200 if (!sd->spi && sd->rca != rca) { 1201 return sd_r0; 1202 } 1203 1204 return sd_r1; 1205 1206 default: 1207 break; 1208 } 1209 break; 1210 1211 case 15: /* CMD15: GO_INACTIVE_STATE */ 1212 if (sd->spi) 1213 goto bad_cmd; 1214 switch (sd->mode) { 1215 case sd_data_transfer_mode: 1216 if (sd->rca != rca) 1217 return sd_r0; 1218 1219 sd->state = sd_inactive_state; 1220 return sd_r0; 1221 1222 default: 1223 break; 1224 } 1225 break; 1226 1227 /* Block read commands (Classs 2) */ 1228 case 16: /* CMD16: SET_BLOCKLEN */ 1229 switch (sd->state) { 1230 case sd_transfer_state: 1231 if (req.arg > (1 << HWBLOCK_SHIFT)) { 1232 sd->card_status |= BLOCK_LEN_ERROR; 1233 } else { 1234 trace_sdcard_set_blocklen(req.arg); 1235 sd->blk_len = req.arg; 1236 } 1237 1238 return sd_r1; 1239 1240 default: 1241 break; 1242 } 1243 break; 1244 1245 case 17: /* CMD17: READ_SINGLE_BLOCK */ 1246 case 18: /* CMD18: READ_MULTIPLE_BLOCK */ 1247 switch (sd->state) { 1248 case sd_transfer_state: 1249 1250 if (!address_in_range(sd, "READ_BLOCK", addr, sd->blk_len)) { 1251 return sd_r1; 1252 } 1253 1254 sd->state = sd_sendingdata_state; 1255 sd->data_start = addr; 1256 sd->data_offset = 0; 1257 return sd_r1; 1258 1259 default: 1260 break; 1261 } 1262 break; 1263 1264 case 19: /* CMD19: SEND_TUNING_BLOCK (SD) */ 1265 if (sd->spec_version < SD_PHY_SPECv3_01_VERS) { 1266 break; 1267 } 1268 if (sd->state == sd_transfer_state) { 1269 sd->state = sd_sendingdata_state; 1270 sd->data_offset = 0; 1271 return sd_r1; 1272 } 1273 break; 1274 1275 case 23: /* CMD23: SET_BLOCK_COUNT */ 1276 if (sd->spec_version < SD_PHY_SPECv3_01_VERS) { 1277 break; 1278 } 1279 switch (sd->state) { 1280 case sd_transfer_state: 1281 sd->multi_blk_cnt = req.arg; 1282 return sd_r1; 1283 1284 default: 1285 break; 1286 } 1287 break; 1288 1289 /* Block write commands (Class 4) */ 1290 case 24: /* CMD24: WRITE_SINGLE_BLOCK */ 1291 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */ 1292 switch (sd->state) { 1293 case sd_transfer_state: 1294 1295 if (!address_in_range(sd, "WRITE_BLOCK", addr, sd->blk_len)) { 1296 return sd_r1; 1297 } 1298 1299 sd->state = sd_receivingdata_state; 1300 sd->data_start = addr; 1301 sd->data_offset = 0; 1302 sd->blk_written = 0; 1303 1304 if (sd->size <= SDSC_MAX_CAPACITY) { 1305 if (sd_wp_addr(sd, sd->data_start)) { 1306 sd->card_status |= WP_VIOLATION; 1307 } 1308 } 1309 if (sd->csd[14] & 0x30) { 1310 sd->card_status |= WP_VIOLATION; 1311 } 1312 return sd_r1; 1313 1314 default: 1315 break; 1316 } 1317 break; 1318 1319 case 26: /* CMD26: PROGRAM_CID */ 1320 if (sd->spi) 1321 goto bad_cmd; 1322 switch (sd->state) { 1323 case sd_transfer_state: 1324 sd->state = sd_receivingdata_state; 1325 sd->data_start = 0; 1326 sd->data_offset = 0; 1327 return sd_r1; 1328 1329 default: 1330 break; 1331 } 1332 break; 1333 1334 case 27: /* CMD27: PROGRAM_CSD */ 1335 switch (sd->state) { 1336 case sd_transfer_state: 1337 sd->state = sd_receivingdata_state; 1338 sd->data_start = 0; 1339 sd->data_offset = 0; 1340 return sd_r1; 1341 1342 default: 1343 break; 1344 } 1345 break; 1346 1347 /* Write protection (Class 6) */ 1348 case 28: /* CMD28: SET_WRITE_PROT */ 1349 if (sd->size > SDSC_MAX_CAPACITY) { 1350 return sd_illegal; 1351 } 1352 1353 switch (sd->state) { 1354 case sd_transfer_state: 1355 if (!address_in_range(sd, "SET_WRITE_PROT", addr, 1)) { 1356 return sd_r1b; 1357 } 1358 1359 sd->state = sd_programming_state; 1360 set_bit(sd_addr_to_wpnum(addr), sd->wp_group_bmap); 1361 /* Bzzzzzzztt .... Operation complete. */ 1362 sd->state = sd_transfer_state; 1363 return sd_r1b; 1364 1365 default: 1366 break; 1367 } 1368 break; 1369 1370 case 29: /* CMD29: CLR_WRITE_PROT */ 1371 if (sd->size > SDSC_MAX_CAPACITY) { 1372 return sd_illegal; 1373 } 1374 1375 switch (sd->state) { 1376 case sd_transfer_state: 1377 if (!address_in_range(sd, "CLR_WRITE_PROT", addr, 1)) { 1378 return sd_r1b; 1379 } 1380 1381 sd->state = sd_programming_state; 1382 clear_bit(sd_addr_to_wpnum(addr), sd->wp_group_bmap); 1383 /* Bzzzzzzztt .... Operation complete. */ 1384 sd->state = sd_transfer_state; 1385 return sd_r1b; 1386 1387 default: 1388 break; 1389 } 1390 break; 1391 1392 case 30: /* CMD30: SEND_WRITE_PROT */ 1393 if (sd->size > SDSC_MAX_CAPACITY) { 1394 return sd_illegal; 1395 } 1396 1397 switch (sd->state) { 1398 case sd_transfer_state: 1399 if (!address_in_range(sd, "SEND_WRITE_PROT", 1400 req.arg, sd->blk_len)) { 1401 return sd_r1; 1402 } 1403 1404 sd->state = sd_sendingdata_state; 1405 *(uint32_t *) sd->data = sd_wpbits(sd, req.arg); 1406 sd->data_start = addr; 1407 sd->data_offset = 0; 1408 return sd_r1; 1409 1410 default: 1411 break; 1412 } 1413 break; 1414 1415 /* Erase commands (Class 5) */ 1416 case 32: /* CMD32: ERASE_WR_BLK_START */ 1417 switch (sd->state) { 1418 case sd_transfer_state: 1419 sd->erase_start = req.arg; 1420 return sd_r1; 1421 1422 default: 1423 break; 1424 } 1425 break; 1426 1427 case 33: /* CMD33: ERASE_WR_BLK_END */ 1428 switch (sd->state) { 1429 case sd_transfer_state: 1430 sd->erase_end = req.arg; 1431 return sd_r1; 1432 1433 default: 1434 break; 1435 } 1436 break; 1437 1438 case 38: /* CMD38: ERASE */ 1439 switch (sd->state) { 1440 case sd_transfer_state: 1441 if (sd->csd[14] & 0x30) { 1442 sd->card_status |= WP_VIOLATION; 1443 return sd_r1b; 1444 } 1445 1446 sd->state = sd_programming_state; 1447 sd_erase(sd); 1448 /* Bzzzzzzztt .... Operation complete. */ 1449 sd->state = sd_transfer_state; 1450 return sd_r1b; 1451 1452 default: 1453 break; 1454 } 1455 break; 1456 1457 /* Lock card commands (Class 7) */ 1458 case 42: /* CMD42: LOCK_UNLOCK */ 1459 switch (sd->state) { 1460 case sd_transfer_state: 1461 sd->state = sd_receivingdata_state; 1462 sd->data_start = 0; 1463 sd->data_offset = 0; 1464 return sd_r1; 1465 1466 default: 1467 break; 1468 } 1469 break; 1470 1471 case 52 ... 54: 1472 /* CMD52, CMD53, CMD54: reserved for SDIO cards 1473 * (see the SDIO Simplified Specification V2.0) 1474 * Handle as illegal command but do not complain 1475 * on stderr, as some OSes may use these in their 1476 * probing for presence of an SDIO card. 1477 */ 1478 return sd_illegal; 1479 1480 /* Application specific commands (Class 8) */ 1481 case 55: /* CMD55: APP_CMD */ 1482 switch (sd->state) { 1483 case sd_ready_state: 1484 case sd_identification_state: 1485 case sd_inactive_state: 1486 return sd_illegal; 1487 case sd_idle_state: 1488 if (rca) { 1489 qemu_log_mask(LOG_GUEST_ERROR, 1490 "SD: illegal RCA 0x%04x for APP_CMD\n", req.cmd); 1491 } 1492 default: 1493 break; 1494 } 1495 if (!sd->spi) { 1496 if (sd->rca != rca) { 1497 return sd_r0; 1498 } 1499 } 1500 sd->expecting_acmd = true; 1501 sd->card_status |= APP_CMD; 1502 return sd_r1; 1503 1504 case 56: /* CMD56: GEN_CMD */ 1505 switch (sd->state) { 1506 case sd_transfer_state: 1507 sd->data_offset = 0; 1508 if (req.arg & 1) 1509 sd->state = sd_sendingdata_state; 1510 else 1511 sd->state = sd_receivingdata_state; 1512 return sd_r1; 1513 1514 default: 1515 break; 1516 } 1517 break; 1518 1519 case 58: /* CMD58: READ_OCR (SPI) */ 1520 if (!sd->spi) { 1521 goto bad_cmd; 1522 } 1523 return sd_r3; 1524 1525 case 59: /* CMD59: CRC_ON_OFF (SPI) */ 1526 if (!sd->spi) { 1527 goto bad_cmd; 1528 } 1529 return sd_r1; 1530 1531 default: 1532 bad_cmd: 1533 qemu_log_mask(LOG_GUEST_ERROR, "SD: Unknown CMD%i\n", req.cmd); 1534 return sd_illegal; 1535 } 1536 1537 qemu_log_mask(LOG_GUEST_ERROR, "SD: CMD%i in a wrong state: %s\n", 1538 req.cmd, sd_state_name(sd->state)); 1539 return sd_illegal; 1540 } 1541 1542 static sd_rsp_type_t sd_app_command(SDState *sd, 1543 SDRequest req) 1544 { 1545 trace_sdcard_app_command(sd->proto_name, sd_acmd_name(req.cmd), 1546 req.cmd, req.arg, sd_state_name(sd->state)); 1547 sd->card_status |= APP_CMD; 1548 switch (req.cmd) { 1549 case 6: /* ACMD6: SET_BUS_WIDTH */ 1550 if (sd->spi) { 1551 goto unimplemented_spi_cmd; 1552 } 1553 switch (sd->state) { 1554 case sd_transfer_state: 1555 sd->sd_status[0] &= 0x3f; 1556 sd->sd_status[0] |= (req.arg & 0x03) << 6; 1557 return sd_r1; 1558 1559 default: 1560 break; 1561 } 1562 break; 1563 1564 case 13: /* ACMD13: SD_STATUS */ 1565 switch (sd->state) { 1566 case sd_transfer_state: 1567 sd->state = sd_sendingdata_state; 1568 sd->data_start = 0; 1569 sd->data_offset = 0; 1570 return sd_r1; 1571 1572 default: 1573 break; 1574 } 1575 break; 1576 1577 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */ 1578 switch (sd->state) { 1579 case sd_transfer_state: 1580 *(uint32_t *) sd->data = sd->blk_written; 1581 1582 sd->state = sd_sendingdata_state; 1583 sd->data_start = 0; 1584 sd->data_offset = 0; 1585 return sd_r1; 1586 1587 default: 1588 break; 1589 } 1590 break; 1591 1592 case 23: /* ACMD23: SET_WR_BLK_ERASE_COUNT */ 1593 switch (sd->state) { 1594 case sd_transfer_state: 1595 return sd_r1; 1596 1597 default: 1598 break; 1599 } 1600 break; 1601 1602 case 41: /* ACMD41: SD_APP_OP_COND */ 1603 if (sd->spi) { 1604 /* SEND_OP_CMD */ 1605 sd->state = sd_transfer_state; 1606 return sd_r1; 1607 } 1608 if (sd->state != sd_idle_state) { 1609 break; 1610 } 1611 /* If it's the first ACMD41 since reset, we need to decide 1612 * whether to power up. If this is not an enquiry ACMD41, 1613 * we immediately report power on and proceed below to the 1614 * ready state, but if it is, we set a timer to model a 1615 * delay for power up. This works around a bug in EDK2 1616 * UEFI, which sends an initial enquiry ACMD41, but 1617 * assumes that the card is in ready state as soon as it 1618 * sees the power up bit set. */ 1619 if (!FIELD_EX32(sd->ocr, OCR, CARD_POWER_UP)) { 1620 if ((req.arg & ACMD41_ENQUIRY_MASK) != 0) { 1621 timer_del(sd->ocr_power_timer); 1622 sd_ocr_powerup(sd); 1623 } else { 1624 trace_sdcard_inquiry_cmd41(); 1625 if (!timer_pending(sd->ocr_power_timer)) { 1626 timer_mod_ns(sd->ocr_power_timer, 1627 (qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) 1628 + OCR_POWER_DELAY_NS)); 1629 } 1630 } 1631 } 1632 1633 if (FIELD_EX32(sd->ocr & req.arg, OCR, VDD_VOLTAGE_WINDOW)) { 1634 /* We accept any voltage. 10000 V is nothing. 1635 * 1636 * Once we're powered up, we advance straight to ready state 1637 * unless it's an enquiry ACMD41 (bits 23:0 == 0). 1638 */ 1639 sd->state = sd_ready_state; 1640 } 1641 1642 return sd_r3; 1643 1644 case 42: /* ACMD42: SET_CLR_CARD_DETECT */ 1645 switch (sd->state) { 1646 case sd_transfer_state: 1647 /* Bringing in the 50KOhm pull-up resistor... Done. */ 1648 return sd_r1; 1649 1650 default: 1651 break; 1652 } 1653 break; 1654 1655 case 51: /* ACMD51: SEND_SCR */ 1656 switch (sd->state) { 1657 case sd_transfer_state: 1658 sd->state = sd_sendingdata_state; 1659 sd->data_start = 0; 1660 sd->data_offset = 0; 1661 return sd_r1; 1662 1663 default: 1664 break; 1665 } 1666 break; 1667 1668 case 18: /* Reserved for SD security applications */ 1669 case 25: 1670 case 26: 1671 case 38: 1672 case 43 ... 49: 1673 /* Refer to the "SD Specifications Part3 Security Specification" for 1674 * information about the SD Security Features. 1675 */ 1676 qemu_log_mask(LOG_UNIMP, "SD: CMD%i Security not implemented\n", 1677 req.cmd); 1678 return sd_illegal; 1679 1680 default: 1681 /* Fall back to standard commands. */ 1682 return sd_normal_command(sd, req); 1683 1684 unimplemented_spi_cmd: 1685 /* Commands that are recognised but not yet implemented in SPI mode. */ 1686 qemu_log_mask(LOG_UNIMP, "SD: CMD%i not implemented in SPI mode\n", 1687 req.cmd); 1688 return sd_illegal; 1689 } 1690 1691 qemu_log_mask(LOG_GUEST_ERROR, "SD: ACMD%i in a wrong state\n", req.cmd); 1692 return sd_illegal; 1693 } 1694 1695 static int cmd_valid_while_locked(SDState *sd, const uint8_t cmd) 1696 { 1697 /* Valid commands in locked state: 1698 * basic class (0) 1699 * lock card class (7) 1700 * CMD16 1701 * implicitly, the ACMD prefix CMD55 1702 * ACMD41 and ACMD42 1703 * Anything else provokes an "illegal command" response. 1704 */ 1705 if (sd->expecting_acmd) { 1706 return cmd == 41 || cmd == 42; 1707 } 1708 if (cmd == 16 || cmd == 55) { 1709 return 1; 1710 } 1711 return sd_cmd_class[cmd] == 0 || sd_cmd_class[cmd] == 7; 1712 } 1713 1714 int sd_do_command(SDState *sd, SDRequest *req, 1715 uint8_t *response) { 1716 int last_state; 1717 sd_rsp_type_t rtype; 1718 int rsplen; 1719 1720 if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable) { 1721 return 0; 1722 } 1723 1724 if (sd_req_crc_validate(req)) { 1725 sd->card_status |= COM_CRC_ERROR; 1726 rtype = sd_illegal; 1727 goto send_response; 1728 } 1729 1730 if (req->cmd >= SDMMC_CMD_MAX) { 1731 qemu_log_mask(LOG_GUEST_ERROR, "SD: incorrect command 0x%02x\n", 1732 req->cmd); 1733 req->cmd &= 0x3f; 1734 } 1735 1736 if (sd->card_status & CARD_IS_LOCKED) { 1737 if (!cmd_valid_while_locked(sd, req->cmd)) { 1738 sd->card_status |= ILLEGAL_COMMAND; 1739 sd->expecting_acmd = false; 1740 qemu_log_mask(LOG_GUEST_ERROR, "SD: Card is locked\n"); 1741 rtype = sd_illegal; 1742 goto send_response; 1743 } 1744 } 1745 1746 last_state = sd->state; 1747 sd_set_mode(sd); 1748 1749 if (sd->expecting_acmd) { 1750 sd->expecting_acmd = false; 1751 rtype = sd_app_command(sd, *req); 1752 } else { 1753 rtype = sd_normal_command(sd, *req); 1754 } 1755 1756 if (rtype == sd_illegal) { 1757 sd->card_status |= ILLEGAL_COMMAND; 1758 } else { 1759 /* Valid command, we can update the 'state before command' bits. 1760 * (Do this now so they appear in r1 responses.) 1761 */ 1762 sd->current_cmd = req->cmd; 1763 sd->card_status &= ~CURRENT_STATE; 1764 sd->card_status |= (last_state << 9); 1765 } 1766 1767 send_response: 1768 switch (rtype) { 1769 case sd_r1: 1770 case sd_r1b: 1771 sd_response_r1_make(sd, response); 1772 rsplen = 4; 1773 break; 1774 1775 case sd_r2_i: 1776 memcpy(response, sd->cid, sizeof(sd->cid)); 1777 rsplen = 16; 1778 break; 1779 1780 case sd_r2_s: 1781 memcpy(response, sd->csd, sizeof(sd->csd)); 1782 rsplen = 16; 1783 break; 1784 1785 case sd_r3: 1786 sd_response_r3_make(sd, response); 1787 rsplen = 4; 1788 break; 1789 1790 case sd_r6: 1791 sd_response_r6_make(sd, response); 1792 rsplen = 4; 1793 break; 1794 1795 case sd_r7: 1796 sd_response_r7_make(sd, response); 1797 rsplen = 4; 1798 break; 1799 1800 case sd_r0: 1801 case sd_illegal: 1802 rsplen = 0; 1803 break; 1804 default: 1805 g_assert_not_reached(); 1806 } 1807 trace_sdcard_response(sd_response_name(rtype), rsplen); 1808 1809 if (rtype != sd_illegal) { 1810 /* Clear the "clear on valid command" status bits now we've 1811 * sent any response 1812 */ 1813 sd->card_status &= ~CARD_STATUS_B; 1814 } 1815 1816 #ifdef DEBUG_SD 1817 qemu_hexdump(stderr, "Response", response, rsplen); 1818 #endif 1819 1820 return rsplen; 1821 } 1822 1823 void sd_write_byte(SDState *sd, uint8_t value) 1824 { 1825 int i; 1826 1827 if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable) 1828 return; 1829 1830 if (sd->state != sd_receivingdata_state) { 1831 qemu_log_mask(LOG_GUEST_ERROR, 1832 "%s: not in Receiving-Data state\n", __func__); 1833 return; 1834 } 1835 1836 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION)) 1837 return; 1838 1839 trace_sdcard_write_data(sd->proto_name, 1840 sd_acmd_name(sd->current_cmd), 1841 sd->current_cmd, value); 1842 switch (sd->current_cmd) { 1843 case 24: /* CMD24: WRITE_SINGLE_BLOCK */ 1844 sd->data[sd->data_offset ++] = value; 1845 if (sd->data_offset >= sd->blk_len) { 1846 /* TODO: Check CRC before committing */ 1847 sd->state = sd_programming_state; 1848 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset); 1849 sd->blk_written ++; 1850 sd->csd[14] |= 0x40; 1851 /* Bzzzzzzztt .... Operation complete. */ 1852 sd->state = sd_transfer_state; 1853 } 1854 break; 1855 1856 case 25: /* CMD25: WRITE_MULTIPLE_BLOCK */ 1857 if (sd->data_offset == 0) { 1858 /* Start of the block - let's check the address is valid */ 1859 if (!address_in_range(sd, "WRITE_MULTIPLE_BLOCK", 1860 sd->data_start, sd->blk_len)) { 1861 break; 1862 } 1863 if (sd->size <= SDSC_MAX_CAPACITY) { 1864 if (sd_wp_addr(sd, sd->data_start)) { 1865 sd->card_status |= WP_VIOLATION; 1866 break; 1867 } 1868 } 1869 } 1870 sd->data[sd->data_offset++] = value; 1871 if (sd->data_offset >= sd->blk_len) { 1872 /* TODO: Check CRC before committing */ 1873 sd->state = sd_programming_state; 1874 BLK_WRITE_BLOCK(sd->data_start, sd->data_offset); 1875 sd->blk_written++; 1876 sd->data_start += sd->blk_len; 1877 sd->data_offset = 0; 1878 sd->csd[14] |= 0x40; 1879 1880 /* Bzzzzzzztt .... Operation complete. */ 1881 if (sd->multi_blk_cnt != 0) { 1882 if (--sd->multi_blk_cnt == 0) { 1883 /* Stop! */ 1884 sd->state = sd_transfer_state; 1885 break; 1886 } 1887 } 1888 1889 sd->state = sd_receivingdata_state; 1890 } 1891 break; 1892 1893 case 26: /* CMD26: PROGRAM_CID */ 1894 sd->data[sd->data_offset ++] = value; 1895 if (sd->data_offset >= sizeof(sd->cid)) { 1896 /* TODO: Check CRC before committing */ 1897 sd->state = sd_programming_state; 1898 for (i = 0; i < sizeof(sd->cid); i ++) 1899 if ((sd->cid[i] | 0x00) != sd->data[i]) 1900 sd->card_status |= CID_CSD_OVERWRITE; 1901 1902 if (!(sd->card_status & CID_CSD_OVERWRITE)) 1903 for (i = 0; i < sizeof(sd->cid); i ++) { 1904 sd->cid[i] |= 0x00; 1905 sd->cid[i] &= sd->data[i]; 1906 } 1907 /* Bzzzzzzztt .... Operation complete. */ 1908 sd->state = sd_transfer_state; 1909 } 1910 break; 1911 1912 case 27: /* CMD27: PROGRAM_CSD */ 1913 sd->data[sd->data_offset ++] = value; 1914 if (sd->data_offset >= sizeof(sd->csd)) { 1915 /* TODO: Check CRC before committing */ 1916 sd->state = sd_programming_state; 1917 for (i = 0; i < sizeof(sd->csd); i ++) 1918 if ((sd->csd[i] | sd_csd_rw_mask[i]) != 1919 (sd->data[i] | sd_csd_rw_mask[i])) 1920 sd->card_status |= CID_CSD_OVERWRITE; 1921 1922 /* Copy flag (OTP) & Permanent write protect */ 1923 if (sd->csd[14] & ~sd->data[14] & 0x60) 1924 sd->card_status |= CID_CSD_OVERWRITE; 1925 1926 if (!(sd->card_status & CID_CSD_OVERWRITE)) 1927 for (i = 0; i < sizeof(sd->csd); i ++) { 1928 sd->csd[i] |= sd_csd_rw_mask[i]; 1929 sd->csd[i] &= sd->data[i]; 1930 } 1931 /* Bzzzzzzztt .... Operation complete. */ 1932 sd->state = sd_transfer_state; 1933 } 1934 break; 1935 1936 case 42: /* CMD42: LOCK_UNLOCK */ 1937 sd->data[sd->data_offset ++] = value; 1938 if (sd->data_offset >= sd->blk_len) { 1939 /* TODO: Check CRC before committing */ 1940 sd->state = sd_programming_state; 1941 sd_lock_command(sd); 1942 /* Bzzzzzzztt .... Operation complete. */ 1943 sd->state = sd_transfer_state; 1944 } 1945 break; 1946 1947 case 56: /* CMD56: GEN_CMD */ 1948 sd->data[sd->data_offset ++] = value; 1949 if (sd->data_offset >= sd->blk_len) { 1950 APP_WRITE_BLOCK(sd->data_start, sd->data_offset); 1951 sd->state = sd_transfer_state; 1952 } 1953 break; 1954 1955 default: 1956 qemu_log_mask(LOG_GUEST_ERROR, "%s: unknown command\n", __func__); 1957 break; 1958 } 1959 } 1960 1961 #define SD_TUNING_BLOCK_SIZE 64 1962 1963 static const uint8_t sd_tuning_block_pattern[SD_TUNING_BLOCK_SIZE] = { 1964 /* See: Physical Layer Simplified Specification Version 3.01, Table 4-2 */ 1965 0xff, 0x0f, 0xff, 0x00, 0x0f, 0xfc, 0xc3, 0xcc, 1966 0xc3, 0x3c, 0xcc, 0xff, 0xfe, 0xff, 0xfe, 0xef, 1967 0xff, 0xdf, 0xff, 0xdd, 0xff, 0xfb, 0xff, 0xfb, 1968 0xbf, 0xff, 0x7f, 0xff, 0x77, 0xf7, 0xbd, 0xef, 1969 0xff, 0xf0, 0xff, 0xf0, 0x0f, 0xfc, 0xcc, 0x3c, 1970 0xcc, 0x33, 0xcc, 0xcf, 0xff, 0xef, 0xff, 0xee, 1971 0xff, 0xfd, 0xff, 0xfd, 0xdf, 0xff, 0xbf, 0xff, 1972 0xbb, 0xff, 0xf7, 0xff, 0xf7, 0x7f, 0x7b, 0xde, 1973 }; 1974 1975 uint8_t sd_read_byte(SDState *sd) 1976 { 1977 /* TODO: Append CRCs */ 1978 uint8_t ret; 1979 uint32_t io_len; 1980 1981 if (!sd->blk || !blk_is_inserted(sd->blk) || !sd->enable) 1982 return 0x00; 1983 1984 if (sd->state != sd_sendingdata_state) { 1985 qemu_log_mask(LOG_GUEST_ERROR, 1986 "%s: not in Sending-Data state\n", __func__); 1987 return 0x00; 1988 } 1989 1990 if (sd->card_status & (ADDRESS_ERROR | WP_VIOLATION)) 1991 return 0x00; 1992 1993 io_len = (sd->ocr & (1 << 30)) ? 512 : sd->blk_len; 1994 1995 trace_sdcard_read_data(sd->proto_name, 1996 sd_acmd_name(sd->current_cmd), 1997 sd->current_cmd, io_len); 1998 switch (sd->current_cmd) { 1999 case 6: /* CMD6: SWITCH_FUNCTION */ 2000 ret = sd->data[sd->data_offset ++]; 2001 2002 if (sd->data_offset >= 64) 2003 sd->state = sd_transfer_state; 2004 break; 2005 2006 case 9: /* CMD9: SEND_CSD */ 2007 case 10: /* CMD10: SEND_CID */ 2008 ret = sd->data[sd->data_offset ++]; 2009 2010 if (sd->data_offset >= 16) 2011 sd->state = sd_transfer_state; 2012 break; 2013 2014 case 13: /* ACMD13: SD_STATUS */ 2015 ret = sd->sd_status[sd->data_offset ++]; 2016 2017 if (sd->data_offset >= sizeof(sd->sd_status)) 2018 sd->state = sd_transfer_state; 2019 break; 2020 2021 case 17: /* CMD17: READ_SINGLE_BLOCK */ 2022 if (sd->data_offset == 0) 2023 BLK_READ_BLOCK(sd->data_start, io_len); 2024 ret = sd->data[sd->data_offset ++]; 2025 2026 if (sd->data_offset >= io_len) 2027 sd->state = sd_transfer_state; 2028 break; 2029 2030 case 18: /* CMD18: READ_MULTIPLE_BLOCK */ 2031 if (sd->data_offset == 0) { 2032 if (!address_in_range(sd, "READ_MULTIPLE_BLOCK", 2033 sd->data_start, io_len)) { 2034 return 0x00; 2035 } 2036 BLK_READ_BLOCK(sd->data_start, io_len); 2037 } 2038 ret = sd->data[sd->data_offset ++]; 2039 2040 if (sd->data_offset >= io_len) { 2041 sd->data_start += io_len; 2042 sd->data_offset = 0; 2043 2044 if (sd->multi_blk_cnt != 0) { 2045 if (--sd->multi_blk_cnt == 0) { 2046 /* Stop! */ 2047 sd->state = sd_transfer_state; 2048 break; 2049 } 2050 } 2051 } 2052 break; 2053 2054 case 19: /* CMD19: SEND_TUNING_BLOCK (SD) */ 2055 if (sd->data_offset >= SD_TUNING_BLOCK_SIZE - 1) { 2056 sd->state = sd_transfer_state; 2057 } 2058 ret = sd_tuning_block_pattern[sd->data_offset++]; 2059 break; 2060 2061 case 22: /* ACMD22: SEND_NUM_WR_BLOCKS */ 2062 ret = sd->data[sd->data_offset ++]; 2063 2064 if (sd->data_offset >= 4) 2065 sd->state = sd_transfer_state; 2066 break; 2067 2068 case 30: /* CMD30: SEND_WRITE_PROT */ 2069 ret = sd->data[sd->data_offset ++]; 2070 2071 if (sd->data_offset >= 4) 2072 sd->state = sd_transfer_state; 2073 break; 2074 2075 case 51: /* ACMD51: SEND_SCR */ 2076 ret = sd->scr[sd->data_offset ++]; 2077 2078 if (sd->data_offset >= sizeof(sd->scr)) 2079 sd->state = sd_transfer_state; 2080 break; 2081 2082 case 56: /* CMD56: GEN_CMD */ 2083 if (sd->data_offset == 0) 2084 APP_READ_BLOCK(sd->data_start, sd->blk_len); 2085 ret = sd->data[sd->data_offset ++]; 2086 2087 if (sd->data_offset >= sd->blk_len) 2088 sd->state = sd_transfer_state; 2089 break; 2090 2091 default: 2092 qemu_log_mask(LOG_GUEST_ERROR, "%s: unknown command\n", __func__); 2093 return 0x00; 2094 } 2095 2096 return ret; 2097 } 2098 2099 static bool sd_receive_ready(SDState *sd) 2100 { 2101 return sd->state == sd_receivingdata_state; 2102 } 2103 2104 static bool sd_data_ready(SDState *sd) 2105 { 2106 return sd->state == sd_sendingdata_state; 2107 } 2108 2109 void sd_enable(SDState *sd, bool enable) 2110 { 2111 sd->enable = enable; 2112 } 2113 2114 static void sd_instance_init(Object *obj) 2115 { 2116 SDState *sd = SD_CARD(obj); 2117 2118 sd->enable = true; 2119 sd->ocr_power_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, sd_ocr_powerup, sd); 2120 } 2121 2122 static void sd_instance_finalize(Object *obj) 2123 { 2124 SDState *sd = SD_CARD(obj); 2125 2126 timer_free(sd->ocr_power_timer); 2127 } 2128 2129 static void sd_realize(DeviceState *dev, Error **errp) 2130 { 2131 SDState *sd = SD_CARD(dev); 2132 int ret; 2133 2134 sd->proto_name = sd->spi ? "SPI" : "SD"; 2135 2136 switch (sd->spec_version) { 2137 case SD_PHY_SPECv1_10_VERS 2138 ... SD_PHY_SPECv3_01_VERS: 2139 break; 2140 default: 2141 error_setg(errp, "Invalid SD card Spec version: %u", sd->spec_version); 2142 return; 2143 } 2144 2145 if (sd->blk) { 2146 int64_t blk_size; 2147 2148 if (!blk_supports_write_perm(sd->blk)) { 2149 error_setg(errp, "Cannot use read-only drive as SD card"); 2150 return; 2151 } 2152 2153 blk_size = blk_getlength(sd->blk); 2154 if (blk_size > 0 && !is_power_of_2(blk_size)) { 2155 int64_t blk_size_aligned = pow2ceil(blk_size); 2156 char *blk_size_str; 2157 2158 blk_size_str = size_to_str(blk_size); 2159 error_setg(errp, "Invalid SD card size: %s", blk_size_str); 2160 g_free(blk_size_str); 2161 2162 blk_size_str = size_to_str(blk_size_aligned); 2163 error_append_hint(errp, 2164 "SD card size has to be a power of 2, e.g. %s.\n" 2165 "You can resize disk images with" 2166 " 'qemu-img resize <imagefile> <new-size>'\n" 2167 "(note that this will lose data if you make the" 2168 " image smaller than it currently is).\n", 2169 blk_size_str); 2170 g_free(blk_size_str); 2171 2172 return; 2173 } 2174 2175 ret = blk_set_perm(sd->blk, BLK_PERM_CONSISTENT_READ | BLK_PERM_WRITE, 2176 BLK_PERM_ALL, errp); 2177 if (ret < 0) { 2178 return; 2179 } 2180 blk_set_dev_ops(sd->blk, &sd_block_ops, sd); 2181 } 2182 } 2183 2184 static Property sd_properties[] = { 2185 DEFINE_PROP_UINT8("spec_version", SDState, 2186 spec_version, SD_PHY_SPECv2_00_VERS), 2187 DEFINE_PROP_DRIVE("drive", SDState, blk), 2188 /* We do not model the chip select pin, so allow the board to select 2189 * whether card should be in SSI or MMC/SD mode. It is also up to the 2190 * board to ensure that ssi transfers only occur when the chip select 2191 * is asserted. */ 2192 DEFINE_PROP_BOOL("spi", SDState, spi, false), 2193 DEFINE_PROP_END_OF_LIST() 2194 }; 2195 2196 static void sd_class_init(ObjectClass *klass, void *data) 2197 { 2198 DeviceClass *dc = DEVICE_CLASS(klass); 2199 SDCardClass *sc = SD_CARD_CLASS(klass); 2200 2201 dc->realize = sd_realize; 2202 device_class_set_props(dc, sd_properties); 2203 dc->vmsd = &sd_vmstate; 2204 dc->reset = sd_reset; 2205 dc->bus_type = TYPE_SD_BUS; 2206 set_bit(DEVICE_CATEGORY_STORAGE, dc->categories); 2207 2208 sc->set_voltage = sd_set_voltage; 2209 sc->get_dat_lines = sd_get_dat_lines; 2210 sc->get_cmd_line = sd_get_cmd_line; 2211 sc->do_command = sd_do_command; 2212 sc->write_byte = sd_write_byte; 2213 sc->read_byte = sd_read_byte; 2214 sc->receive_ready = sd_receive_ready; 2215 sc->data_ready = sd_data_ready; 2216 sc->enable = sd_enable; 2217 sc->get_inserted = sd_get_inserted; 2218 sc->get_readonly = sd_get_readonly; 2219 } 2220 2221 static const TypeInfo sd_info = { 2222 .name = TYPE_SD_CARD, 2223 .parent = TYPE_DEVICE, 2224 .instance_size = sizeof(SDState), 2225 .class_size = sizeof(SDCardClass), 2226 .class_init = sd_class_init, 2227 .instance_init = sd_instance_init, 2228 .instance_finalize = sd_instance_finalize, 2229 }; 2230 2231 static void sd_register_types(void) 2232 { 2233 type_register_static(&sd_info); 2234 } 2235 2236 type_init(sd_register_types) 2237