summaryrefslogtreecommitdiff
path: root/EmbeddedPkg/Universal/MmcDxe/MmcIdentification.c
blob: 08cc405ed8f1d633603462cc29e8238808a66179 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
/** @file
*
*  Copyright (c) 2011-2014, ARM Limited. All rights reserved.
*
*  This program and the accompanying materials
*  are licensed and made available under the terms and conditions of the BSD License
*  which accompanies this distribution.  The full text of the license may be found at
*  http://opensource.org/licenses/bsd-license.php
*
*  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
*  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/

#include <Library/TimerLib.h>

#include "Mmc.h"

typedef union {
  UINT32 Raw;
  OCR    Ocr;
} OCR_RESPONSE;

#define MAX_RETRY_COUNT         1000
#define CMD_RETRY_COUNT         20
#define RCA_SHIFT_OFFSET        16
#define EMMC_CARD_SIZE          512
#define EMMC_ECSD_SIZE_OFFSET   53

UINT32 mEmmcRcaCount = 0;

STATIC
EFI_STATUS
EFIAPI
EmmcIdentificationMode (
  IN MMC_HOST_INSTANCE     *MmcHostInstance,
  IN OCR_RESPONSE           Response
  )
{
  EFI_MMC_HOST_PROTOCOL *Host;
  EFI_BLOCK_IO_MEDIA    *Media;
  EFI_STATUS Status;
  UINT32     RCA;
  UINT32     ECSD[128];

  Host  = MmcHostInstance->MmcHost;
  Media = MmcHostInstance->BlockIo.Media;

  // Fetch card identity register
  Status = Host->SendCommand (Host, MMC_CMD2, 0);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to send CMD2, Status=%r.\n", Status));
    return Status;
  }

  Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R2, (UINT32 *)&(MmcHostInstance->CardInfo.CIDData));
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): CID retrieval error, Status=%r.\n", Status));
    return Status;
  }

  // Assign a relative address value to the card
  MmcHostInstance->CardInfo.RCA = ++mEmmcRcaCount; // TODO: might need a more sophisticated way of doing this
  RCA = MmcHostInstance->CardInfo.RCA << RCA_SHIFT_OFFSET;
  Status = Host->SendCommand (Host, MMC_CMD3, RCA);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): RCA set error, Status=%r.\n", Status));
    return Status;
  }

  // Fetch card specific data
  Status = Host->SendCommand (Host, MMC_CMD9, RCA);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Failed to send CMD9, Status=%r.\n", Status));
    return Status;
  }

  Status = Host->ReceiveResponse (Host, MMC_RESPONSE_TYPE_R2, (UINT32 *)&(MmcHostInstance->CardInfo.CSDData));
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): CSD retrieval error, Status=%r.\n", Status));
    return Status;
  }

  // Select the card
  Status = Host->SendCommand (Host, MMC_CMD7, RCA);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): Card selection error, Status=%r.\n", Status));
  }

  // Fetch ECSD
  Status = Host->SendCommand (Host, MMC_CMD8, RCA);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD fetch error, Status=%r.\n", Status));
  }

  Status = Host->ReadBlockData (Host, 0, 512, ECSD);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "EmmcIdentificationMode(): ECSD read error, Status=%r.\n", Status));
    return Status;
  }

  // Set up media
  Media->BlockSize = EMMC_CARD_SIZE; // 512-byte support is mandatory for eMMC cards
  Media->MediaId = MmcHostInstance->CardInfo.CIDData.PSN;
  Media->ReadOnly = MmcHostInstance->CardInfo.CSDData.PERM_WRITE_PROTECT;
  Media->LogicalBlocksPerPhysicalBlock = 1;
  Media->IoAlign = 4;
  // Compute last block using bits [215:212] of the ECSD
  Media->LastBlock = ECSD[EMMC_ECSD_SIZE_OFFSET] - 1; // eMMC isn't supposed to report this for
  // Cards <2GB in size, but the model does.

  // Setup card type
  MmcHostInstance->CardInfo.CardType = EMMC_CARD;
  return EFI_SUCCESS;
}

STATIC
EFI_STATUS
InitializeSdMmcDevice (
  IN  MMC_HOST_INSTANCE   *MmcHostInstance
  )
{
  UINT32        CmdArg;
  UINT32        Response[4];
  UINTN         BlockSize;
  UINTN         CardSize;
  UINTN         NumBlocks;
  EFI_STATUS    Status;
  EFI_MMC_HOST_PROTOCOL     *MmcHost;

  MmcHost = MmcHostInstance->MmcHost;

  // Send a command to get Card specific data
  CmdArg = MmcHostInstance->CardInfo.RCA << 16;
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD9, CmdArg);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(MMC_CMD9): Error, Status=%r\n", Status));
    return Status;
  }

  // Read Response
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_CSD, Response);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(): Failed to receive CSD, Status=%r\n", Status));
    return Status;
  }
  PrintCSD (Response);

  if (MmcHostInstance->CardInfo.CardType == SD_CARD_2_HIGH) {
    CardSize = HC_MMC_CSD_GET_DEVICESIZE (Response);
    NumBlocks = ((CardSize + 1) * 1024);
    BlockSize = 1 << MMC_CSD_GET_READBLLEN (Response);
  } else {
    CardSize = MMC_CSD_GET_DEVICESIZE (Response);
    NumBlocks = (CardSize + 1) * (1 << (MMC_CSD_GET_DEVICESIZEMULT (Response) + 2));
    BlockSize = 1 << MMC_CSD_GET_READBLLEN (Response);
  }

  // For >=2G card, BlockSize may be 1K, but the transfer size is 512 bytes.
  if (BlockSize > 512) {
    NumBlocks = MultU64x32 (NumBlocks, BlockSize / 512);
    BlockSize = 512;
  }

  MmcHostInstance->BlockIo.Media->LastBlock    = (NumBlocks - 1);
  MmcHostInstance->BlockIo.Media->BlockSize    = BlockSize;
  MmcHostInstance->BlockIo.Media->ReadOnly     = MmcHost->IsReadOnly (MmcHost);
  MmcHostInstance->BlockIo.Media->MediaPresent = TRUE;
  MmcHostInstance->BlockIo.Media->MediaId++;

  CmdArg = MmcHostInstance->CardInfo.RCA << 16;
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD7, CmdArg);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeSdMmcDevice(MMC_CMD7): Error and Status = %r\n", Status));
    return Status;
  }

  return EFI_SUCCESS;
}

STATIC
EFI_STATUS
EFIAPI
MmcIdentificationMode (
  IN MMC_HOST_INSTANCE     *MmcHostInstance
  )
{
  EFI_STATUS              Status;
  UINT32                  Response[4];
  UINTN                   Timeout;
  UINTN                   CmdArg;
  BOOLEAN                 IsHCS;
  EFI_MMC_HOST_PROTOCOL   *MmcHost;
  OCR_RESPONSE            OcrResponse;

  MmcHost = MmcHostInstance->MmcHost;
  CmdArg = 0;
  IsHCS = FALSE;

  if (MmcHost == NULL) {
    return EFI_INVALID_PARAMETER;
  }

  // We can get into this function if we restart the identification mode
  if (MmcHostInstance->State == MmcHwInitializationState) {
    // Initialize the MMC Host HW
    Status = MmcNotifyState (MmcHostInstance, MmcHwInitializationState);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcHwInitializationState, Status=%r.\n", Status));
      return Status;
    }
  }

  Status = MmcHost->SendCommand (MmcHost, MMC_CMD0, 0);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD0): Error, Status=%r.\n", Status));
    return Status;
  }
  Status = MmcNotifyState (MmcHostInstance, MmcIdleState);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdleState, Status=%r.\n", Status));
    return Status;
  }

  // Send CMD1 to get OCR (MMC)
  // This command only valid for MMC and eMMC
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD1, EMMC_CMD1_CAPACITY_GREATER_THAN_2GB);
  if (Status == EFI_SUCCESS) {
    Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, (UINT32 *)&OcrResponse);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));
      return Status;
    }

    if (!OcrResponse.Ocr.PowerUp) {
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD1): Card initialisation failure, Status=%r.\n", Status));
      return EFI_DEVICE_ERROR;
    }
    OcrResponse.Ocr.PowerUp = 0;
    if (OcrResponse.Raw == EMMC_CMD1_CAPACITY_GREATER_THAN_2GB) {
      MmcHostInstance->CardInfo.OCRData.AccessMode = BIT1;
    }
    else {
      MmcHostInstance->CardInfo.OCRData.AccessMode = 0x0;
    }
    // Check whether MMC or eMMC
    if (OcrResponse.Raw == EMMC_CMD1_CAPACITY_GREATER_THAN_2GB ||
        OcrResponse.Raw == EMMC_CMD1_CAPACITY_LESS_THAN_2GB) {
      return EmmcIdentificationMode (MmcHostInstance, OcrResponse);
    }
  }

  // Are we using SDIO ?
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD5, 0);
  if (Status == EFI_SUCCESS) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD5): Error - SDIO not supported, Status=%r.\n", Status));
    return EFI_UNSUPPORTED;
  }

  // Check which kind of card we are using. Ver2.00 or later SD Memory Card (PL180 is SD v1.1)
  CmdArg = (0x0UL << 12 | BIT8 | 0xCEUL << 0);
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD8, CmdArg);
  if (Status == EFI_SUCCESS) {
    DEBUG ((EFI_D_ERROR, "Card is SD2.0 => Supports high capacity\n"));
    IsHCS = TRUE;
    Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_R7, Response);
    if (EFI_ERROR (Status)) {
      DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive response to CMD8, Status=%r.\n", Status));
      return Status;
    }
    PrintResponseR1 (Response[0]);
    // Check if it is valid response
    if (Response[0] != CmdArg) {
      DEBUG ((EFI_D_ERROR, "The Card is not usable\n"));
      return EFI_UNSUPPORTED;
    }
  } else {
    DEBUG ((EFI_D_ERROR, "Not a SD2.0 Card\n"));
  }

  // We need to wait for the MMC or SD card is ready => (gCardInfo.OCRData.PowerUp == 1)
  Timeout = MAX_RETRY_COUNT;
  while (Timeout > 0) {
    // SD Card or MMC Card ? CMD55 indicates to the card that the next command is an application specific command
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD55, 0);
    if (Status == EFI_SUCCESS) {
      DEBUG ((EFI_D_INFO, "Card should be SD\n"));
      if (IsHCS) {
        MmcHostInstance->CardInfo.CardType = SD_CARD_2;
      } else {
        MmcHostInstance->CardInfo.CardType = SD_CARD;
      }

      // Note: The first time CmdArg will be zero
      CmdArg = ((UINTN *) &(MmcHostInstance->CardInfo.OCRData))[0];
      if (IsHCS) {
        CmdArg |= BIT30;
      }
      Status = MmcHost->SendCommand (MmcHost, MMC_ACMD41, CmdArg);
      if (!EFI_ERROR (Status)) {
        Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, Response);
        if (EFI_ERROR (Status)) {
          DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));
          return Status;
        }
        ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];
      }
    } else {
      DEBUG ((EFI_D_INFO, "Card should be MMC\n"));
      MmcHostInstance->CardInfo.CardType = MMC_CARD;

      Status = MmcHost->SendCommand (MmcHost, MMC_CMD1, 0x800000);
      if (!EFI_ERROR (Status)) {
        Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_OCR, Response);
        if (EFI_ERROR (Status)) {
          DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive OCR, Status=%r.\n", Status));
          return Status;
        }
        ((UINT32 *) &(MmcHostInstance->CardInfo.OCRData))[0] = Response[0];
      }
    }

    if (!EFI_ERROR (Status)) {
      if (!MmcHostInstance->CardInfo.OCRData.PowerUp) {
        MicroSecondDelay (1);
        Timeout--;
      } else {
        if ((MmcHostInstance->CardInfo.CardType == SD_CARD_2) && (MmcHostInstance->CardInfo.OCRData.AccessMode & BIT1)) {
          MmcHostInstance->CardInfo.CardType = SD_CARD_2_HIGH;
          DEBUG ((EFI_D_ERROR, "High capacity card.\n"));
        }
        break;  // The MMC/SD card is ready. Continue the Identification Mode
      }
    } else {
      MicroSecondDelay (1);
      Timeout--;
    }
  }

  if (Timeout == 0) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(): No Card\n"));
    return EFI_NO_MEDIA;
  } else {
    PrintOCR (Response[0]);
  }

  Status = MmcNotifyState (MmcHostInstance, MmcReadyState);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcReadyState\n"));
    return Status;
  }

  Status = MmcHost->SendCommand (MmcHost, MMC_CMD2, 0);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD2): Error\n"));
    return Status;
  }
  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_CID, Response);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive CID, Status=%r.\n", Status));
    return Status;
  }

  PrintCID (Response);

  Status = MmcHost->NotifyState (MmcHost, MmcIdentificationState);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcIdentificationState\n"));
    return Status;
  }

  //
  // Note, SD specifications say that "if the command execution causes a state change, it
  // will be visible to the host in the response to the next command"
  // The status returned for this CMD3 will be 2 - identification
  //
  CmdArg = 1;
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD3, CmdArg);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode(MMC_CMD3): Error\n"));
    return Status;
  }

  Status = MmcHost->ReceiveResponse (MmcHost, MMC_RESPONSE_TYPE_RCA, Response);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Failed to receive RCA, Status=%r.\n", Status));
    return Status;
  }
  PrintRCA (Response[0]);

  // For MMC card, RCA is assigned by CMD3 while CMD3 dumps the RCA for SD card
  if (MmcHostInstance->CardInfo.CardType != MMC_CARD) {
    MmcHostInstance->CardInfo.RCA = Response[0] >> 16;
  } else {
    MmcHostInstance->CardInfo.RCA = CmdArg;
  }
  Status = MmcNotifyState (MmcHostInstance, MmcStandByState);
  if (EFI_ERROR (Status)) {
    DEBUG ((EFI_D_ERROR, "MmcIdentificationMode() : Error MmcStandByState\n"));
    return Status;
  }

  return EFI_SUCCESS;
}

EFI_STATUS
InitializeMmcDevice (
  IN  MMC_HOST_INSTANCE   *MmcHostInstance
  )
{
  EFI_STATUS              Status;
  EFI_MMC_HOST_PROTOCOL   *MmcHost;
  UINTN                   BlockCount;

  BlockCount = 1;
  MmcHost = MmcHostInstance->MmcHost;

  Status = MmcIdentificationMode (MmcHostInstance);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(): Error in Identification Mode, Status=%r\n", Status));
    return Status;
  }

  Status = MmcNotifyState (MmcHostInstance, MmcTransferState);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(): Error MmcTransferState, Status=%r\n", Status));
    return Status;
  }

  if (MmcHostInstance->CardInfo.CardType != EMMC_CARD) {
    Status = InitializeSdMmcDevice (MmcHostInstance);
    if (EFI_ERROR (Status)) {
      return Status;
    }
  }

  // Set Block Length
  Status = MmcHost->SendCommand (MmcHost, MMC_CMD16, MmcHostInstance->BlockIo.Media->BlockSize);
  if (EFI_ERROR (Status)) {
    DEBUG((EFI_D_ERROR, "InitializeMmcDevice(MMC_CMD16): Error MmcHostInstance->BlockIo.Media->BlockSize: %d and Error = %r\n",
                        MmcHostInstance->BlockIo.Media->BlockSize, Status));
    return Status;
  }

  // Block Count (not used). Could return an error for SD card
  if (MmcHostInstance->CardInfo.CardType == MMC_CARD) {
    Status = MmcHost->SendCommand (MmcHost, MMC_CMD23, BlockCount);
    if (EFI_ERROR (Status)) {
      DEBUG((EFI_D_ERROR, "InitializeMmcDevice(MMC_CMD23): Error, Status=%r\n", Status));
      return Status;
    }
  }

  return EFI_SUCCESS;
}