Add a DMA lib for the OMAP. It is a combination of PCI IO (generic ARM) DMA functions...
[mirror_edk2.git] / Omap35xxPkg / MMCHSDxe / MMCHS.c
1 /** @file
2 MMC/SD Card driver for OMAP 35xx (SDIO not supported)
3
4 This driver always produces a BlockIo protocol but it starts off with no Media
5 present. A TimerCallBack detects when media is inserted or removed and after
6 a media change event a call to BlockIo ReadBlocks/WriteBlocks will cause the
7 media to be detected (or removed) and the BlockIo Media structure will get
8 updated. No MMC/SD Card harward registers are updated until the first BlockIo
9 ReadBlocks/WriteBlocks after media has been insterted (booting with a card
10 plugged in counts as an insertion event).
11
12 Copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
13
14 This program and the accompanying materials
15 are licensed and made available under the terms and conditions of the BSD License
16 which accompanies this distribution. The full text of the license may be found at
17 http://opensource.org/licenses/bsd-license.php
18
19 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
20 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
21
22 **/
23
24 #include "MMCHS.h"
25
26 EFI_BLOCK_IO_MEDIA gMMCHSMedia = {
27 SIGNATURE_32('s','d','i','o'), // MediaId
28 TRUE, // RemovableMedia
29 FALSE, // MediaPresent
30 FALSE, // LogicalPartition
31 FALSE, // ReadOnly
32 FALSE, // WriteCaching
33 512, // BlockSize
34 4, // IoAlign
35 0, // Pad
36 0 // LastBlock
37 };
38
39 typedef struct {
40 VENDOR_DEVICE_PATH Mmc;
41 EFI_DEVICE_PATH End;
42 } MMCHS_DEVICE_PATH;
43
44 MMCHS_DEVICE_PATH gMmcHsDevicePath = {
45 {
46 HARDWARE_DEVICE_PATH,
47 HW_VENDOR_DP,
48 (UINT8)(sizeof(VENDOR_DEVICE_PATH)),
49 (UINT8)((sizeof(VENDOR_DEVICE_PATH)) >> 8),
50 0xb615f1f5, 0x5088, 0x43cd, 0x80, 0x9c, 0xa1, 0x6e, 0x52, 0x48, 0x7d, 0x00
51 },
52 {
53 END_DEVICE_PATH_TYPE,
54 END_ENTIRE_DEVICE_PATH_SUBTYPE,
55 sizeof (EFI_DEVICE_PATH_PROTOCOL),
56 0
57 }
58 };
59
60 CARD_INFO gCardInfo;
61 EMBEDDED_EXTERNAL_DEVICE *gTPS65950;
62 EFI_EVENT gTimerEvent;
63 BOOLEAN gMediaChange = FALSE;
64
65 //
66 // Internal Functions
67 //
68
69
70 VOID
71 ParseCardCIDData (
72 UINT32 Response0,
73 UINT32 Response1,
74 UINT32 Response2,
75 UINT32 Response3
76 )
77 {
78 gCardInfo.CIDData.MDT = ((Response0 >> 8) & 0xFFF);
79 gCardInfo.CIDData.PSN = (((Response0 >> 24) & 0xFF) | ((Response1 & 0xFFFFFF) << 8));
80 gCardInfo.CIDData.PRV = ((Response1 >> 24) & 0xFF);
81 gCardInfo.CIDData.PNM[4] = ((Response2) & 0xFF);
82 gCardInfo.CIDData.PNM[3] = ((Response2 >> 8) & 0xFF);
83 gCardInfo.CIDData.PNM[2] = ((Response2 >> 16) & 0xFF);
84 gCardInfo.CIDData.PNM[1] = ((Response2 >> 24) & 0xFF);
85 gCardInfo.CIDData.PNM[0] = ((Response3) & 0xFF);
86 gCardInfo.CIDData.OID = ((Response3 >> 8) & 0xFFFF);
87 gCardInfo.CIDData.MID = ((Response3 >> 24) & 0xFF);
88 }
89
90
91 VOID
92 UpdateMMCHSClkFrequency (
93 UINTN NewCLKD
94 )
95 {
96 //Set Clock enable to 0x0 to not provide the clock to the card
97 MmioAnd32 (MMCHS_SYSCTL, ~CEN);
98
99 //Set new clock frequency.
100 MmioAndThenOr32 (MMCHS_SYSCTL, ~CLKD_MASK, NewCLKD << 6);
101
102 //Poll till Internal Clock Stable
103 while ((MmioRead32 (MMCHS_SYSCTL) & ICS_MASK) != ICS);
104
105 //Set Clock enable to 0x1 to provide the clock to the card
106 MmioOr32 (MMCHS_SYSCTL, CEN);
107 }
108
109
110 EFI_STATUS
111 SendCmd (
112 UINTN Cmd,
113 UINTN CmdInterruptEnableVal,
114 UINTN CmdArgument
115 )
116 {
117 UINTN MmcStatus;
118 UINTN RetryCount = 0;
119
120 //Check if command line is in use or not. Poll till command line is available.
121 while ((MmioRead32 (MMCHS_PSTATE) & DATI_MASK) == DATI_NOT_ALLOWED);
122
123 //Provide the block size.
124 MmioWrite32 (MMCHS_BLK, BLEN_512BYTES);
125
126 //Setting Data timeout counter value to max value.
127 MmioAndThenOr32 (MMCHS_SYSCTL, ~DTO_MASK, DTO_VAL);
128
129 //Clear Status register.
130 MmioWrite32 (MMCHS_STAT, 0xFFFFFFFF);
131
132 //Set command argument register
133 MmioWrite32 (MMCHS_ARG, CmdArgument);
134
135 //Enable interrupt enable events to occur
136 MmioWrite32 (MMCHS_IE, CmdInterruptEnableVal);
137
138 //Send a command
139 MmioWrite32 (MMCHS_CMD, Cmd);
140
141 //Check for the command status.
142 while (RetryCount < MAX_RETRY_COUNT) {
143 do {
144 MmcStatus = MmioRead32 (MMCHS_STAT);
145 } while (MmcStatus == 0);
146
147 //Read status of command response
148 if ((MmcStatus & ERRI) != 0) {
149
150 //Perform soft-reset for mmci_cmd line.
151 MmioOr32 (MMCHS_SYSCTL, SRC);
152 while ((MmioRead32 (MMCHS_SYSCTL) & SRC));
153
154 DEBUG ((EFI_D_INFO, "MmcStatus: %x\n", MmcStatus));
155 return EFI_DEVICE_ERROR;
156 }
157
158 //Check if command is completed.
159 if ((MmcStatus & CC) == CC) {
160 MmioWrite32 (MMCHS_STAT, CC);
161 break;
162 }
163
164 RetryCount++;
165 }
166
167 if (RetryCount == MAX_RETRY_COUNT) {
168 return EFI_TIMEOUT;
169 }
170
171 return EFI_SUCCESS;
172 }
173
174
175 VOID
176 GetBlockInformation (
177 UINTN *BlockSize,
178 UINTN *NumBlocks
179 )
180 {
181 CSD_SDV2 *CsdSDV2Data;
182 UINTN CardSize;
183
184 if (gCardInfo.CardType == SD_CARD_2_HIGH) {
185 CsdSDV2Data = (CSD_SDV2 *)&gCardInfo.CSDData;
186
187 //Populate BlockSize.
188 *BlockSize = (0x1UL << CsdSDV2Data->READ_BL_LEN);
189
190 //Calculate Total number of blocks.
191 CardSize = CsdSDV2Data->C_SIZELow16 | (CsdSDV2Data->C_SIZEHigh6 << 2);
192 *NumBlocks = ((CardSize + 1) * 1024);
193 } else {
194 //Populate BlockSize.
195 *BlockSize = (0x1UL << gCardInfo.CSDData.READ_BL_LEN);
196
197 //Calculate Total number of blocks.
198 CardSize = gCardInfo.CSDData.C_SIZELow2 | (gCardInfo.CSDData.C_SIZEHigh10 << 2);
199 *NumBlocks = (CardSize + 1) * (1 << (gCardInfo.CSDData.C_SIZE_MULT + 2));
200 }
201
202 //For >=2G card, BlockSize may be 1K, but the transfer size is 512 bytes.
203 if (*BlockSize > 512) {
204 *NumBlocks = MultU64x32(*NumBlocks, *BlockSize/2);
205 *BlockSize = 512;
206 }
207
208 DEBUG ((EFI_D_INFO, "Card type: %x, BlockSize: %x, NumBlocks: %x\n", gCardInfo.CardType, *BlockSize, *NumBlocks));
209 }
210
211
212 VOID
213 CalculateCardCLKD (
214 UINTN *ClockFrequencySelect
215 )
216 {
217 UINT8 MaxDataTransferRate;
218 UINTN TransferRateValue = 0;
219 UINTN TimeValue = 0 ;
220 UINTN Frequency = 0;
221
222 MaxDataTransferRate = gCardInfo.CSDData.TRAN_SPEED;
223
224 // For SD Cards we would need to send CMD6 to set
225 // speeds abouve 25MHz. High Speed mode 50 MHz and up
226
227 //Calculate Transfer rate unit (Bits 2:0 of TRAN_SPEED)
228 switch (MaxDataTransferRate & 0x7) {
229 case 0:
230 TransferRateValue = 100 * 1000;
231 break;
232
233 case 1:
234 TransferRateValue = 1 * 1000 * 1000;
235 break;
236
237 case 2:
238 TransferRateValue = 10 * 1000 * 1000;
239 break;
240
241 case 3:
242 TransferRateValue = 100 * 1000 * 1000;
243 break;
244
245 default:
246 DEBUG((EFI_D_ERROR, "Invalid parameter.\n"));
247 ASSERT(FALSE);
248 }
249
250 //Calculate Time value (Bits 6:3 of TRAN_SPEED)
251 switch ((MaxDataTransferRate >> 3) & 0xF) {
252 case 1:
253 TimeValue = 10;
254 break;
255
256 case 2:
257 TimeValue = 12;
258 break;
259
260 case 3:
261 TimeValue = 13;
262 break;
263
264 case 4:
265 TimeValue = 15;
266 break;
267
268 case 5:
269 TimeValue = 20;
270 break;
271
272 case 6:
273 TimeValue = 25;
274 break;
275
276 case 7:
277 TimeValue = 30;
278 break;
279
280 case 8:
281 TimeValue = 35;
282 break;
283
284 case 9:
285 TimeValue = 40;
286 break;
287
288 case 10:
289 TimeValue = 45;
290 break;
291
292 case 11:
293 TimeValue = 50;
294 break;
295
296 case 12:
297 TimeValue = 55;
298 break;
299
300 case 13:
301 TimeValue = 60;
302 break;
303
304 case 14:
305 TimeValue = 70;
306 break;
307
308 case 15:
309 TimeValue = 80;
310 break;
311
312 default:
313 DEBUG((EFI_D_ERROR, "Invalid parameter.\n"));
314 ASSERT(FALSE);
315 }
316
317 Frequency = TransferRateValue * TimeValue/10;
318
319 //Calculate Clock divider value to program in MMCHS_SYSCTL[CLKD] field.
320 *ClockFrequencySelect = ((MMC_REFERENCE_CLK/Frequency) + 1);
321
322 DEBUG ((EFI_D_INFO, "MaxDataTransferRate: 0x%x, Frequency: %d KHz, ClockFrequencySelect: %x\n", MaxDataTransferRate, Frequency/1000, *ClockFrequencySelect));
323 }
324
325
326 VOID
327 GetCardConfigurationData (
328 VOID
329 )
330 {
331 UINTN BlockSize;
332 UINTN NumBlocks;
333 UINTN ClockFrequencySelect;
334
335 //Calculate BlockSize and Total number of blocks in the detected card.
336 GetBlockInformation(&BlockSize, &NumBlocks);
337 gCardInfo.BlockSize = BlockSize;
338 gCardInfo.NumBlocks = NumBlocks;
339
340 //Calculate Card clock divider value.
341 CalculateCardCLKD(&ClockFrequencySelect);
342 gCardInfo.ClockFrequencySelect = ClockFrequencySelect;
343 }
344
345
346 EFI_STATUS
347 InitializeMMCHS (
348 VOID
349 )
350 {
351 UINT8 Data = 0;
352 EFI_STATUS Status;
353
354 //Select Device group to belong to P1 device group in Power IC.
355 Data = DEV_GRP_P1;
356 Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEV_GRP), 1, &Data);
357 ASSERT_EFI_ERROR(Status);
358
359 //Configure voltage regulator for MMC1 in Power IC to output 3.0 voltage.
360 Data = VSEL_3_00V;
361 Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEDICATED_REG), 1, &Data);
362 ASSERT_EFI_ERROR(Status);
363
364 //After ramping up voltage, set VDDS stable bit to indicate that voltage level is stable.
365 MmioOr32 (CONTROL_PBIAS_LITE, (PBIASLITEVMODE0 | PBIASLITEPWRDNZ0 | PBIASSPEEDCTRL0 | PBIASLITEVMODE1 | PBIASLITEWRDNZ1));
366
367 // Enable WP GPIO
368 MmioAndThenOr32 (GPIO1_BASE + GPIO_OE, ~BIT23, BIT23);
369
370 // Enable Card Detect
371 Data = CARD_DETECT_ENABLE;
372 gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, TPS65950_GPIO_CTRL), 1, &Data);
373
374
375 return Status;
376 }
377
378
379 EFI_STATUS
380 PerformCardIdenfication (
381 VOID
382 )
383 {
384 EFI_STATUS Status;
385 UINTN CmdArgument = 0;
386 UINTN Response = 0;
387 UINTN RetryCount = 0;
388 BOOLEAN SDCmd8Supported = FALSE;
389
390 //Enable interrupts.
391 MmioWrite32 (MMCHS_IE, (BADA_EN | CERR_EN | DEB_EN | DCRC_EN | DTO_EN | CIE_EN |
392 CEB_EN | CCRC_EN | CTO_EN | BRR_EN | BWR_EN | TC_EN | CC_EN));
393
394 //Controller INIT procedure start.
395 MmioOr32 (MMCHS_CON, INIT);
396 MmioWrite32 (MMCHS_CMD, 0x00000000);
397 while (!(MmioRead32 (MMCHS_STAT) & CC));
398
399 //Wait for 1 ms
400 gBS->Stall(1000);
401
402 //Set CC bit to 0x1 to clear the flag
403 MmioOr32 (MMCHS_STAT, CC);
404
405 //Retry INIT procedure.
406 MmioWrite32 (MMCHS_CMD, 0x00000000);
407 while (!(MmioRead32 (MMCHS_STAT) & CC));
408
409 //End initialization sequence
410 MmioAnd32 (MMCHS_CON, ~INIT);
411
412 MmioOr32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_ON));
413
414 //Change clock frequency to 400KHz to fit protocol
415 UpdateMMCHSClkFrequency(CLKD_400KHZ);
416
417 MmioOr32 (MMCHS_CON, OD);
418
419 //Send CMD0 command.
420 Status = SendCmd (CMD0, CMD0_INT_EN, CmdArgument);
421 if (EFI_ERROR(Status)) {
422 DEBUG ((EFI_D_ERROR, "Cmd0 fails.\n"));
423 return Status;
424 }
425
426 DEBUG ((EFI_D_INFO, "CMD0 response: %x\n", MmioRead32 (MMCHS_RSP10)));
427
428 //Send CMD5 command.
429 Status = SendCmd (CMD5, CMD5_INT_EN, CmdArgument);
430 if (Status == EFI_SUCCESS) {
431 DEBUG ((EFI_D_ERROR, "CMD5 Success. SDIO card. Follow SDIO card specification.\n"));
432 DEBUG ((EFI_D_INFO, "CMD5 response: %x\n", MmioRead32 (MMCHS_RSP10)));
433 //NOTE: Returning unsupported error for now. Need to implement SDIO specification.
434 return EFI_UNSUPPORTED;
435 } else {
436 DEBUG ((EFI_D_INFO, "CMD5 fails. Not an SDIO card.\n"));
437 }
438
439 MmioOr32 (MMCHS_SYSCTL, SRC);
440 gBS->Stall(1000);
441 while ((MmioRead32 (MMCHS_SYSCTL) & SRC));
442
443 //Send CMD8 command. (New v2.00 command for Voltage check)
444 //Only 2.7V - 3.6V is supported for SD2.0, only SD 2.0 card can pass.
445 //MMC & SD1.1 card will fail this command.
446 CmdArgument = CMD8_ARG;
447 Status = SendCmd (CMD8, CMD8_INT_EN, CmdArgument);
448 if (Status == EFI_SUCCESS) {
449 Response = MmioRead32 (MMCHS_RSP10);
450 DEBUG ((EFI_D_INFO, "CMD8 success. CMD8 response: %x\n", Response));
451 if (Response != CmdArgument) {
452 return EFI_DEVICE_ERROR;
453 }
454 DEBUG ((EFI_D_INFO, "Card is SD2.0\n"));
455 SDCmd8Supported = TRUE; //Supports high capacity.
456 } else {
457 DEBUG ((EFI_D_INFO, "CMD8 fails. Not an SD2.0 card.\n"));
458 }
459
460 MmioOr32 (MMCHS_SYSCTL, SRC);
461 gBS->Stall(1000);
462 while ((MmioRead32 (MMCHS_SYSCTL) & SRC));
463
464 //Poll till card is busy
465 while (RetryCount < MAX_RETRY_COUNT) {
466 //Send CMD55 command.
467 CmdArgument = 0;
468 Status = SendCmd (CMD55, CMD55_INT_EN, CmdArgument);
469 if (Status == EFI_SUCCESS) {
470 DEBUG ((EFI_D_INFO, "CMD55 success. CMD55 response: %x\n", MmioRead32 (MMCHS_RSP10)));
471 gCardInfo.CardType = SD_CARD;
472 } else {
473 DEBUG ((EFI_D_INFO, "CMD55 fails.\n"));
474 gCardInfo.CardType = MMC_CARD;
475 }
476
477 //Send appropriate command for the card type which got detected.
478 if (gCardInfo.CardType == SD_CARD) {
479 CmdArgument = ((UINTN *) &(gCardInfo.OCRData))[0];
480
481 //Set HCS bit.
482 if (SDCmd8Supported) {
483 CmdArgument |= HCS;
484 }
485
486 Status = SendCmd (ACMD41, ACMD41_INT_EN, CmdArgument);
487 if (EFI_ERROR(Status)) {
488 DEBUG ((EFI_D_INFO, "ACMD41 fails.\n"));
489 return Status;
490 }
491 ((UINT32 *) &(gCardInfo.OCRData))[0] = MmioRead32 (MMCHS_RSP10);
492 DEBUG ((EFI_D_INFO, "SD card detected. ACMD41 OCR: %x\n", ((UINT32 *) &(gCardInfo.OCRData))[0]));
493 } else if (gCardInfo.CardType == MMC_CARD) {
494 CmdArgument = 0;
495 Status = SendCmd (CMD1, CMD1_INT_EN, CmdArgument);
496 if (EFI_ERROR(Status)) {
497 DEBUG ((EFI_D_INFO, "CMD1 fails.\n"));
498 return Status;
499 }
500 Response = MmioRead32 (MMCHS_RSP10);
501 DEBUG ((EFI_D_INFO, "MMC card detected.. CMD1 response: %x\n", Response));
502
503 //NOTE: For now, I am skipping this since I only have an SD card.
504 //Compare card OCR and host OCR (Section 22.6.1.3.2.4)
505 return EFI_UNSUPPORTED; //For now, MMC is not supported.
506 }
507
508 //Poll the card until it is out of its power-up sequence.
509 if (gCardInfo.OCRData.Busy == 1) {
510
511 if (SDCmd8Supported) {
512 gCardInfo.CardType = SD_CARD_2;
513 }
514
515 //Card is ready. Check CCS (Card capacity status) bit (bit#30).
516 //SD 2.0 standard card will response with CCS 0, SD high capacity card will respond with CCS 1.
517 if (gCardInfo.OCRData.AccessMode & BIT1) {
518 gCardInfo.CardType = SD_CARD_2_HIGH;
519 DEBUG ((EFI_D_INFO, "High capacity card.\n"));
520 } else {
521 DEBUG ((EFI_D_INFO, "Standard capacity card.\n"));
522 }
523
524 break;
525 }
526
527 gBS->Stall(1000);
528 RetryCount++;
529 }
530
531 if (RetryCount == MAX_RETRY_COUNT) {
532 DEBUG ((EFI_D_ERROR, "Timeout error. RetryCount: %d\n", RetryCount));
533 return EFI_TIMEOUT;
534 }
535
536 //Read CID data.
537 CmdArgument = 0;
538 Status = SendCmd (CMD2, CMD2_INT_EN, CmdArgument);
539 if (EFI_ERROR(Status)) {
540 DEBUG ((EFI_D_ERROR, "CMD2 fails. Status: %x\n", Status));
541 return Status;
542 }
543
544 DEBUG ((EFI_D_INFO, "CMD2 response: %x %x %x %x\n", MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76)));
545
546 //Parse CID register data.
547 ParseCardCIDData(MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76));
548
549 //Read RCA
550 CmdArgument = 0;
551 Status = SendCmd (CMD3, CMD3_INT_EN, CmdArgument);
552 if (EFI_ERROR(Status)) {
553 DEBUG ((EFI_D_ERROR, "CMD3 fails. Status: %x\n", Status));
554 return Status;
555 }
556
557 //Set RCA for the detected card. RCA is CMD3 response.
558 gCardInfo.RCA = (MmioRead32 (MMCHS_RSP10) >> 16);
559 DEBUG ((EFI_D_INFO, "CMD3 response: RCA %x\n", gCardInfo.RCA));
560
561 //MMC Bus setting change after card identification.
562 MmioAnd32 (MMCHS_CON, ~OD);
563 MmioOr32 (MMCHS_HCTL, SDVS_3_0_V);
564 UpdateMMCHSClkFrequency(CLKD_400KHZ); //Set the clock frequency to 400KHz.
565
566 return EFI_SUCCESS;
567 }
568
569
570 EFI_STATUS
571 GetCardSpecificData (
572 VOID
573 )
574 {
575 EFI_STATUS Status;
576 UINTN CmdArgument;
577
578 //Send CMD9 to retrieve CSD.
579 CmdArgument = gCardInfo.RCA << 16;
580 Status = SendCmd (CMD9, CMD9_INT_EN, CmdArgument);
581 if (EFI_ERROR(Status)) {
582 DEBUG ((EFI_D_ERROR, "CMD9 fails. Status: %x\n", Status));
583 return Status;
584 }
585
586 //Populate 128-bit CSD register data.
587 ((UINT32 *)&(gCardInfo.CSDData))[0] = MmioRead32 (MMCHS_RSP10);
588 ((UINT32 *)&(gCardInfo.CSDData))[1] = MmioRead32 (MMCHS_RSP32);
589 ((UINT32 *)&(gCardInfo.CSDData))[2] = MmioRead32 (MMCHS_RSP54);
590 ((UINT32 *)&(gCardInfo.CSDData))[3] = MmioRead32 (MMCHS_RSP76);
591
592 DEBUG ((EFI_D_INFO, "CMD9 response: %x %x %x %x\n", MmioRead32 (MMCHS_RSP10), MmioRead32 (MMCHS_RSP32), MmioRead32 (MMCHS_RSP54), MmioRead32 (MMCHS_RSP76)));
593
594 //Calculate total number of blocks and max. data transfer rate supported by the detected card.
595 GetCardConfigurationData();
596
597 return Status;
598 }
599
600
601 EFI_STATUS
602 PerformCardConfiguration (
603 VOID
604 )
605 {
606 UINTN CmdArgument = 0;
607 EFI_STATUS Status;
608
609 //Send CMD7
610 CmdArgument = gCardInfo.RCA << 16;
611 Status = SendCmd (CMD7, CMD7_INT_EN, CmdArgument);
612 if (EFI_ERROR(Status)) {
613 DEBUG ((EFI_D_ERROR, "CMD7 fails. Status: %x\n", Status));
614 return Status;
615 }
616
617 if ((gCardInfo.CardType != UNKNOWN_CARD) && (gCardInfo.CardType != MMC_CARD)) {
618 // We could read SCR register, but SD Card Phys spec stats any SD Card shall
619 // set SCR.SD_BUS_WIDTHS to support 4-bit mode, so why bother?
620
621 // Send ACMD6 (application specific commands must be prefixed with CMD55)
622 Status = SendCmd (CMD55, CMD55_INT_EN, CmdArgument);
623 if (!EFI_ERROR (Status)) {
624 // set device into 4-bit data bus mode
625 Status = SendCmd (ACMD6, ACMD6_INT_EN, 0x2);
626 if (!EFI_ERROR (Status)) {
627 // Set host controler into 4-bit mode
628 MmioOr32 (MMCHS_HCTL, DTW_4_BIT);
629 DEBUG ((EFI_D_INFO, "SD Memory Card set to 4-bit mode\n"));
630 }
631 }
632 }
633
634 //Send CMD16 to set the block length
635 CmdArgument = gCardInfo.BlockSize;
636 Status = SendCmd (CMD16, CMD16_INT_EN, CmdArgument);
637 if (EFI_ERROR(Status)) {
638 DEBUG ((EFI_D_ERROR, "CMD16 fails. Status: %x\n", Status));
639 return Status;
640 }
641
642 //Change MMCHS clock frequency to what detected card can support.
643 UpdateMMCHSClkFrequency(gCardInfo.ClockFrequencySelect);
644
645 return EFI_SUCCESS;
646 }
647
648
649 EFI_STATUS
650 ReadBlockData (
651 IN EFI_BLOCK_IO_PROTOCOL *This,
652 OUT VOID *Buffer
653 )
654 {
655 UINTN MmcStatus;
656 UINTN *DataBuffer = Buffer;
657 UINTN DataSize = This->Media->BlockSize/4;
658 UINTN Count;
659 UINTN RetryCount = 0;
660
661 //Check controller status to make sure there is no error.
662 while (RetryCount < MAX_RETRY_COUNT) {
663 do {
664 //Read Status.
665 MmcStatus = MmioRead32 (MMCHS_STAT);
666 } while(MmcStatus == 0);
667
668 //Check if Buffer read ready (BRR) bit is set?
669 if (MmcStatus & BRR) {
670
671 //Clear BRR bit
672 MmioOr32 (MMCHS_STAT, BRR);
673
674 //Read block worth of data.
675 for (Count = 0; Count < DataSize; Count++) {
676 *DataBuffer++ = MmioRead32 (MMCHS_DATA);
677 }
678 break;
679 }
680 RetryCount++;
681 }
682
683 if (RetryCount == MAX_RETRY_COUNT) {
684 return EFI_TIMEOUT;
685 }
686
687 return EFI_SUCCESS;
688 }
689
690
691 EFI_STATUS
692 WriteBlockData (
693 IN EFI_BLOCK_IO_PROTOCOL *This,
694 OUT VOID *Buffer
695 )
696 {
697 UINTN MmcStatus;
698 UINTN *DataBuffer = Buffer;
699 UINTN DataSize = This->Media->BlockSize/4;
700 UINTN Count;
701 UINTN RetryCount = 0;
702
703 //Check controller status to make sure there is no error.
704 while (RetryCount < MAX_RETRY_COUNT) {
705 do {
706 //Read Status.
707 MmcStatus = MmioRead32 (MMCHS_STAT);
708 } while(MmcStatus == 0);
709
710 //Check if Buffer write ready (BWR) bit is set?
711 if (MmcStatus & BWR) {
712
713 //Clear BWR bit
714 MmioOr32 (MMCHS_STAT, BWR);
715
716 //Write block worth of data.
717 for (Count = 0; Count < DataSize; Count++) {
718 MmioWrite32 (MMCHS_DATA, *DataBuffer++);
719 }
720
721 break;
722 }
723 RetryCount++;
724 }
725
726 if (RetryCount == MAX_RETRY_COUNT) {
727 return EFI_TIMEOUT;
728 }
729
730 return EFI_SUCCESS;
731 }
732
733 EFI_STATUS
734 DmaBlocks (
735 IN EFI_BLOCK_IO_PROTOCOL *This,
736 IN UINTN Lba,
737 IN OUT VOID *Buffer,
738 IN UINTN BlockCount,
739 IN OPERATION_TYPE OperationType
740 )
741 {
742 EFI_STATUS Status;
743 UINTN RetryCount = 0;
744 UINTN Cmd = 0;
745 UINTN CmdInterruptEnable;
746 UINTN CmdArgument;
747 VOID *BufferMap;
748 EFI_PHYSICAL_ADDRESS BufferAddress;
749 OMAP_DMA4 Dma4;
750 DMA_MAP_OPERATION DmaOperation;
751
752
753 //Populate the command information based on the operation type.
754 if (OperationType == READ) {
755 Cmd = CMD18; //Multiple block read
756 CmdInterruptEnable = CMD18_INT_EN;
757 DmaOperation = MapOperationBusMasterCommonBuffer;
758 } else if (OperationType == WRITE) {
759 Cmd = CMD25; //Multiple block write
760 CmdInterruptEnable = CMD25_INT_EN;
761 DmaOperation = MapOperationBusMasterRead;
762 } else {
763 return EFI_INVALID_PARAMETER;
764 }
765
766 // Map passed in buffer for DMA xfer
767 RetryCount = BlockCount * This->Media->BlockSize;
768 Status = DmaMap (DmaOperation, Buffer, &RetryCount, &BufferAddress, &BufferMap);
769 if (EFI_ERROR (Status)) {
770 return Status;
771 }
772
773 #if 0
774 MmioWrite32 (DMA4_CSDP(0), DMA4_CSDP_DATA_TYPE32 | DMA4_CSDP_SRC_BURST_EN64 | DMA4_CSDP_WRITE_MODE_POSTED);
775 MmioWrite32 (DMA4_CEN(0), 0x4096); // Channel Element number
776 MmioWrite32 (DMA4_CFN(0), 0x1); // Channel Frame number
777 if () {
778 MmioWrite32 (DMA4_CCR(0), X | DMA4_CCR_FS_PACKET | DMA4_CCR_RD_ACTIVE | DMA4_CCR_WR_ACTIVE | DMA4_CCR_DST_AMODE_POST_INC | DMA4_CCR_SEL_SRC_DEST_SYNC_SOURCE);
779 MmioWrite32 (DMA4_CSSA(0), MMCHS_DATA); // Src is SD Card
780 MmioWrite32 (DMA4_CDSA(0), (UINT32)BufferAddress); // Dst memory
781 } else {
782 MmioWrite32 (DMA4_CCR(0), X | DMA4_CCR_FS_PACKET | DMA4_CCR_RD_ACTIVE | DMA4_CCR_WR_ACTIVE | DMA4_CCR_SRC_AMODE_POST_INC);
783 MmioWrite32 (DMA4_CSSA(0), (UINT32)BufferAddress); // Src memory
784 MmioWrite32 (DMA4_CDSA(0), MMCHS_DATA); // Dst SD Card
785 }
786 MmioWrite32 (DMA4_CSE(0), 1);
787 MmioWrite32 (DMA4_CSF(0), This->Media->BlockSize);
788 MmioWrite32 (DMA4_CDE(0), 1);
789 #endif
790 Dma4.DataType = 0; // DMA4_CSDPi[1:0]
791 Dma4.ReadPortAccessType =0; // DMA4_CSDPi[8:7]
792 Dma4.WritePortAccessType =0; // DMA4_CSDPi[15:14]
793 Dma4.SourceEndiansim = 0; // DMA4_CSDPi[21]
794 Dma4.DestinationEndianism = 0; // DMA4_CSDPi[19]
795 Dma4.WriteMode = 0; // DMA4_CSDPi[17:16]
796 Dma4.SourcePacked = 0; // DMA4_CSDPi[6]
797 Dma4.DestinationPacked = 0; // DMA4_CSDPi[13]
798 Dma4.NumberOfElementPerFrame = 0; // DMA4_CENi
799 Dma4.NumberOfFramePerTransferBlock = 0; // DMA4_CFNi
800 Dma4.SourceStartAddress = 0; // DMA4_CSSAi
801 Dma4.DestinationStartAddress = 0; // DMA4_CDSAi
802 Dma4.SourceElementIndex = 0; // DMA4_CSEi
803 Dma4.SourceFrameIndex = 0; // DMA4_CSFi
804 Dma4.DestinationElementIndex = 0; // DMA4_CDEi
805 Dma4.DestinationFrameIndex = 0; // DMA4_CDFi
806 Dma4.ReadPortAccessMode = 0; // DMA4_CCRi[13:12]
807 Dma4.WritePortAccessMode = 0; // DMA4_CCRi[15:14]
808 Dma4.ReadPriority = 0; // DMA4_CCRi[6]
809 Dma4.WritePriority = 0; // DMA4_CCRi[23]
810 Dma4.ReadRequestNumber = 0; // DMA4_CCRi[4:0]
811 Dma4.WriteRequestNumber = 0; // DMA4_CCRi[20:19]
812
813 EnableDmaChannel (2, &Dma4);
814
815
816 //Set command argument based on the card access mode (Byte mode or Block mode)
817 if (gCardInfo.OCRData.AccessMode & BIT1) {
818 CmdArgument = Lba;
819 } else {
820 CmdArgument = Lba * This->Media->BlockSize;
821 }
822
823 //Send Command.
824 Status = SendCmd (Cmd, CmdInterruptEnable, CmdArgument);
825 if (EFI_ERROR (Status)) {
826 DEBUG ((EFI_D_ERROR, "CMD fails. Status: %x\n", Status));
827 return Status;
828 }
829
830 DisableDmaChannel (2);
831 Status = DmaUnmap (BufferMap);
832
833 return Status;
834 }
835
836
837 EFI_STATUS
838 TransferBlock (
839 IN EFI_BLOCK_IO_PROTOCOL *This,
840 IN UINTN Lba,
841 IN OUT VOID *Buffer,
842 IN OPERATION_TYPE OperationType
843 )
844 {
845 EFI_STATUS Status;
846 UINTN MmcStatus;
847 UINTN RetryCount = 0;
848 UINTN Cmd = 0;
849 UINTN CmdInterruptEnable = 0;
850 UINTN CmdArgument = 0;
851
852
853 //Populate the command information based on the operation type.
854 if (OperationType == READ) {
855 Cmd = CMD17; //Single block read
856 CmdInterruptEnable = CMD18_INT_EN;
857 } else if (OperationType == WRITE) {
858 Cmd = CMD24; //Single block write
859 CmdInterruptEnable = CMD24_INT_EN;
860 }
861
862 //Set command argument based on the card access mode (Byte mode or Block mode)
863 if (gCardInfo.OCRData.AccessMode & BIT1) {
864 CmdArgument = Lba;
865 } else {
866 CmdArgument = Lba * This->Media->BlockSize;
867 }
868
869 //Send Command.
870 Status = SendCmd (Cmd, CmdInterruptEnable, CmdArgument);
871 if (EFI_ERROR(Status)) {
872 DEBUG ((EFI_D_ERROR, "CMD fails. Status: %x\n", Status));
873 return Status;
874 }
875
876 //Read or Write data.
877 if (OperationType == READ) {
878 Status = ReadBlockData (This, Buffer);
879 if (EFI_ERROR(Status)) {
880 DEBUG((EFI_D_ERROR, "ReadBlockData fails.\n"));
881 return Status;
882 }
883 } else if (OperationType == WRITE) {
884 Status = WriteBlockData (This, Buffer);
885 if (EFI_ERROR(Status)) {
886 DEBUG((EFI_D_ERROR, "WriteBlockData fails.\n"));
887 return Status;
888 }
889 }
890
891 //Check for the Transfer completion.
892 while (RetryCount < MAX_RETRY_COUNT) {
893 //Read Status
894 do {
895 MmcStatus = MmioRead32 (MMCHS_STAT);
896 } while (MmcStatus == 0);
897
898 //Check if Transfer complete (TC) bit is set?
899 if (MmcStatus & TC) {
900 break;
901 } else {
902 DEBUG ((EFI_D_ERROR, "MmcStatus for TC: %x\n", MmcStatus));
903 //Check if DEB, DCRC or DTO interrupt occured.
904 if ((MmcStatus & DEB) | (MmcStatus & DCRC) | (MmcStatus & DTO)) {
905 //There was an error during the data transfer.
906
907 //Set SRD bit to 1 and wait until it return to 0x0.
908 MmioOr32 (MMCHS_SYSCTL, SRD);
909 while((MmioRead32 (MMCHS_SYSCTL) & SRD) != 0x0);
910
911 return EFI_DEVICE_ERROR;
912 }
913 }
914 RetryCount++;
915 }
916
917 if (RetryCount == MAX_RETRY_COUNT) {
918 DEBUG ((EFI_D_ERROR, "TransferBlockData timed out.\n"));
919 return EFI_TIMEOUT;
920 }
921
922 return EFI_SUCCESS;
923 }
924
925 BOOLEAN
926 CardPresent (
927 VOID
928 )
929 {
930 EFI_STATUS Status;
931 UINT8 Data;
932
933 //
934 // Card detect is a GPIO0 on the TPS65950
935 //
936 Status = gTPS65950->Read (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, GPIODATAIN1), 1, &Data);
937 if (EFI_ERROR (Status)) {
938 return FALSE;
939 }
940
941 if ((Data & CARD_DETECT_BIT) == CARD_DETECT_BIT) {
942 // No Card present
943 return FALSE;
944 } else {
945 return TRUE;
946 }
947 }
948
949 EFI_STATUS
950 DetectCard (
951 VOID
952 )
953 {
954 EFI_STATUS Status;
955
956 if (!CardPresent ()) {
957 return EFI_NO_MEDIA;
958 }
959
960 //Initialize MMC host controller clocks.
961 Status = InitializeMMCHS ();
962 if (EFI_ERROR(Status)) {
963 DEBUG ((EFI_D_ERROR, "Initialize MMC host controller fails. Status: %x\n", Status));
964 return Status;
965 }
966
967 //Software reset of the MMCHS host controller.
968 MmioWrite32 (MMCHS_SYSCONFIG, SOFTRESET);
969 gBS->Stall(1000);
970 while ((MmioRead32 (MMCHS_SYSSTATUS) & RESETDONE_MASK) != RESETDONE);
971
972 //Soft reset for all.
973 MmioWrite32 (MMCHS_SYSCTL, SRA);
974 gBS->Stall(1000);
975 while ((MmioRead32 (MMCHS_SYSCTL) & SRA) != 0x0);
976
977 //Voltage capabilities initialization. Activate VS18 and VS30.
978 MmioOr32 (MMCHS_CAPA, (VS30 | VS18));
979
980 //Wakeup configuration
981 MmioOr32 (MMCHS_SYSCONFIG, ENAWAKEUP);
982 MmioOr32 (MMCHS_HCTL, IWE);
983
984 //MMCHS Controller default initialization
985 MmioOr32 (MMCHS_CON, (OD | DW8_1_4_BIT | CEATA_OFF));
986
987 MmioWrite32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_OFF));
988
989 //Enable internal clock
990 MmioOr32 (MMCHS_SYSCTL, ICE);
991
992 //Set the clock frequency to 80KHz.
993 UpdateMMCHSClkFrequency (CLKD_80KHZ);
994
995 //Enable SD bus power.
996 MmioOr32 (MMCHS_HCTL, (SDBP_ON));
997
998 //Poll till SD bus power bit is set.
999 while ((MmioRead32 (MMCHS_HCTL) & SDBP_MASK) != SDBP_ON);
1000
1001 //Card idenfication
1002 Status = PerformCardIdenfication ();
1003 if (EFI_ERROR(Status)) {
1004 DEBUG ((EFI_D_ERROR, "No MMC/SD card detected.\n"));
1005 return Status;
1006 }
1007
1008 //Get CSD (Card specific data) for the detected card.
1009 Status = GetCardSpecificData();
1010 if (EFI_ERROR(Status)) {
1011 return Status;
1012 }
1013
1014 //Configure the card in data transfer mode.
1015 Status = PerformCardConfiguration();
1016 if (EFI_ERROR(Status)) {
1017 return Status;
1018 }
1019
1020 //Patch the Media structure.
1021 gMMCHSMedia.LastBlock = (gCardInfo.NumBlocks - 1);
1022 gMMCHSMedia.BlockSize = gCardInfo.BlockSize;
1023 gMMCHSMedia.ReadOnly = (MmioRead32 (GPIO1_BASE + GPIO_DATAIN) & BIT23) == BIT23;
1024 gMMCHSMedia.MediaPresent = TRUE;
1025 gMMCHSMedia.MediaId++;
1026
1027 DEBUG ((EFI_D_INFO, "SD Card Media Change on Handle 0x%08x\n", gImageHandle));
1028
1029 return Status;
1030 }
1031
1032
1033 EFI_STATUS
1034 SdReadWrite (
1035 IN EFI_BLOCK_IO_PROTOCOL *This,
1036 IN UINTN Lba,
1037 OUT VOID *Buffer,
1038 IN UINTN BufferSize,
1039 IN OPERATION_TYPE OperationType
1040 )
1041 {
1042 EFI_STATUS Status = EFI_SUCCESS;
1043 UINTN RetryCount = 0;
1044 UINTN BlockCount;
1045 UINTN BytesToBeTranferedThisPass;
1046 UINTN BytesRemainingToBeTransfered;
1047 EFI_TPL OldTpl;
1048 BOOLEAN Update;
1049
1050
1051 Update = FALSE;
1052
1053 if (gMediaChange) {
1054 Update = TRUE;
1055 Status = DetectCard ();
1056 if (EFI_ERROR (Status)) {
1057 // We detected a removal
1058 gMMCHSMedia.MediaPresent = FALSE;
1059 gMMCHSMedia.LastBlock = 0;
1060 gMMCHSMedia.BlockSize = 512; // Should be zero but there is a bug in DiskIo
1061 gMMCHSMedia.ReadOnly = FALSE;
1062 }
1063 gMediaChange = FALSE;
1064 } else if (!gMMCHSMedia.MediaPresent) {
1065 Status = EFI_NO_MEDIA;
1066 goto Done;
1067 }
1068
1069 if (Update) {
1070 DEBUG ((EFI_D_INFO, "SD Card ReinstallProtocolInterface ()\n"));
1071 gBS->ReinstallProtocolInterface (
1072 gImageHandle,
1073 &gEfiBlockIoProtocolGuid,
1074 &gBlockIo,
1075 &gBlockIo
1076 );
1077 }
1078
1079 if (EFI_ERROR (Status)) {
1080 goto Done;
1081 }
1082
1083 if (Buffer == NULL) {
1084 Status = EFI_INVALID_PARAMETER;
1085 goto Done;
1086 }
1087
1088 if (Lba > This->Media->LastBlock) {
1089 Status = EFI_INVALID_PARAMETER;
1090 goto Done;
1091 }
1092
1093 if ((BufferSize % This->Media->BlockSize) != 0) {
1094 Status = EFI_BAD_BUFFER_SIZE;
1095 goto Done;
1096 }
1097
1098 //Check if the data lines are not in use.
1099 while ((RetryCount++ < MAX_RETRY_COUNT) && ((MmioRead32 (MMCHS_PSTATE) & DATI_MASK) != DATI_ALLOWED));
1100 if (RetryCount == MAX_RETRY_COUNT) {
1101 Status = EFI_TIMEOUT;
1102 goto Done;
1103 }
1104
1105 OldTpl = gBS->RaiseTPL (TPL_NOTIFY);
1106
1107 BytesRemainingToBeTransfered = BufferSize;
1108 while (BytesRemainingToBeTransfered > 0) {
1109
1110 if (gMediaChange) {
1111 Status = EFI_NO_MEDIA;
1112 DEBUG ((EFI_D_INFO, "SdReadWrite() EFI_NO_MEDIA due to gMediaChange\n"));
1113 goto DoneRestoreTPL;
1114 }
1115
1116 //BytesToBeTranferedThisPass = (BytesToBeTranferedThisPass >= MAX_MMCHS_TRANSFER_SIZE) ? MAX_MMCHS_TRANSFER_SIZE : BytesRemainingToBeTransfered;
1117 BytesToBeTranferedThisPass = This->Media->BlockSize;
1118
1119 BlockCount = BytesToBeTranferedThisPass/This->Media->BlockSize;
1120
1121 if (BlockCount > 1) {
1122 Status = DmaBlocks (This, Lba, Buffer, BlockCount, OperationType);
1123 } else {
1124 //Transfer a block worth of data.
1125 Status = TransferBlock (This, Lba, Buffer, OperationType);
1126 }
1127
1128 if (EFI_ERROR(Status)) {
1129 DEBUG ((EFI_D_ERROR, "TransferBlockData fails. %x\n", Status));
1130 goto DoneRestoreTPL;
1131 }
1132
1133 BytesRemainingToBeTransfered -= BytesToBeTranferedThisPass;
1134 Lba += BlockCount;
1135 Buffer = (UINT8 *)Buffer + This->Media->BlockSize;
1136 }
1137
1138 DoneRestoreTPL:
1139 gBS->RestoreTPL (OldTpl);
1140 Done:
1141 return Status;
1142 }
1143
1144
1145 /**
1146 Reset the Block Device.
1147
1148 @param This Indicates a pointer to the calling context.
1149 @param ExtendedVerification Driver may perform diagnostics on reset.
1150
1151 @retval EFI_SUCCESS The device was reset.
1152 @retval EFI_DEVICE_ERROR The device is not functioning properly and could
1153 not be reset.
1154
1155 **/
1156 EFI_STATUS
1157 EFIAPI
1158 MMCHSReset (
1159 IN EFI_BLOCK_IO_PROTOCOL *This,
1160 IN BOOLEAN ExtendedVerification
1161 )
1162 {
1163 return EFI_SUCCESS;
1164 }
1165
1166
1167 /**
1168 Read BufferSize bytes from Lba into Buffer.
1169
1170 @param This Indicates a pointer to the calling context.
1171 @param MediaId Id of the media, changes every time the media is replaced.
1172 @param Lba The starting Logical Block Address to read from
1173 @param BufferSize Size of Buffer, must be a multiple of device block size.
1174 @param Buffer A pointer to the destination buffer for the data. The caller is
1175 responsible for either having implicit or explicit ownership of the buffer.
1176
1177 @retval EFI_SUCCESS The data was read correctly from the device.
1178 @retval EFI_DEVICE_ERROR The device reported an error while performing the read.
1179 @retval EFI_NO_MEDIA There is no media in the device.
1180 @retval EFI_MEDIA_CHANGED The MediaId does not matched the current device.
1181 @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
1182 @retval EFI_INVALID_PARAMETER The read request contains LBAs that are not valid,
1183 or the buffer is not on proper alignment.
1184 EFI_STATUS
1185
1186 **/
1187 EFI_STATUS
1188 EFIAPI
1189 MMCHSReadBlocks (
1190 IN EFI_BLOCK_IO_PROTOCOL *This,
1191 IN UINT32 MediaId,
1192 IN EFI_LBA Lba,
1193 IN UINTN BufferSize,
1194 OUT VOID *Buffer
1195 )
1196 {
1197 EFI_STATUS Status;
1198
1199 //Perform Read operation.
1200 Status = SdReadWrite (This, (UINTN)Lba, Buffer, BufferSize, READ);
1201
1202 return Status;
1203 }
1204
1205
1206 /**
1207 Write BufferSize bytes from Lba into Buffer.
1208
1209 @param This Indicates a pointer to the calling context.
1210 @param MediaId The media ID that the write request is for.
1211 @param Lba The starting logical block address to be written. The caller is
1212 responsible for writing to only legitimate locations.
1213 @param BufferSize Size of Buffer, must be a multiple of device block size.
1214 @param Buffer A pointer to the source buffer for the data.
1215
1216 @retval EFI_SUCCESS The data was written correctly to the device.
1217 @retval EFI_WRITE_PROTECTED The device can not be written to.
1218 @retval EFI_DEVICE_ERROR The device reported an error while performing the write.
1219 @retval EFI_NO_MEDIA There is no media in the device.
1220 @retval EFI_MEDIA_CHNAGED The MediaId does not matched the current device.
1221 @retval EFI_BAD_BUFFER_SIZE The Buffer was not a multiple of the block size of the device.
1222 @retval EFI_INVALID_PARAMETER The write request contains LBAs that are not valid,
1223 or the buffer is not on proper alignment.
1224
1225 **/
1226 EFI_STATUS
1227 EFIAPI
1228 MMCHSWriteBlocks (
1229 IN EFI_BLOCK_IO_PROTOCOL *This,
1230 IN UINT32 MediaId,
1231 IN EFI_LBA Lba,
1232 IN UINTN BufferSize,
1233 IN VOID *Buffer
1234 )
1235 {
1236 EFI_STATUS Status;
1237
1238 //Perform write operation.
1239 Status = SdReadWrite (This, (UINTN)Lba, Buffer, BufferSize, WRITE);
1240
1241 return Status;
1242 }
1243
1244
1245 /**
1246 Flush the Block Device.
1247
1248 @param This Indicates a pointer to the calling context.
1249
1250 @retval EFI_SUCCESS All outstanding data was written to the device
1251 @retval EFI_DEVICE_ERROR The device reported an error while writting back the data
1252 @retval EFI_NO_MEDIA There is no media in the device.
1253
1254 **/
1255 EFI_STATUS
1256 EFIAPI
1257 MMCHSFlushBlocks (
1258 IN EFI_BLOCK_IO_PROTOCOL *This
1259 )
1260 {
1261 return EFI_SUCCESS;
1262 }
1263
1264
1265 EFI_BLOCK_IO_PROTOCOL gBlockIo = {
1266 EFI_BLOCK_IO_INTERFACE_REVISION, // Revision
1267 &gMMCHSMedia, // *Media
1268 MMCHSReset, // Reset
1269 MMCHSReadBlocks, // ReadBlocks
1270 MMCHSWriteBlocks, // WriteBlocks
1271 MMCHSFlushBlocks // FlushBlocks
1272 };
1273
1274
1275 /**
1276 Timer callback to convert card present hardware into a boolean that indicates
1277 a media change event has happened. If you just check the GPIO you could see
1278 card 1 and then check again after card 1 was removed and card 2 was inserted
1279 and you would still see media present. Thus you need the timer tick to catch
1280 the toggle event.
1281
1282 @param Event Event whose notification function is being invoked.
1283 @param Context The pointer to the notification function's context,
1284 which is implementation-dependent. Not used.
1285
1286 **/
1287 VOID
1288 EFIAPI
1289 TimerCallback (
1290 IN EFI_EVENT Event,
1291 IN VOID *Context
1292 )
1293 {
1294 BOOLEAN Present;
1295
1296 Present = CardPresent ();
1297 if (gMMCHSMedia.MediaPresent) {
1298 if (!Present && !gMediaChange) {
1299 gMediaChange = TRUE;
1300 }
1301 } else {
1302 if (Present && !gMediaChange) {
1303 gMediaChange = TRUE;
1304 }
1305 }
1306 }
1307
1308
1309 EFI_STATUS
1310 EFIAPI
1311 MMCHSInitialize (
1312 IN EFI_HANDLE ImageHandle,
1313 IN EFI_SYSTEM_TABLE *SystemTable
1314 )
1315 {
1316 EFI_STATUS Status;
1317
1318 Status = gBS->LocateProtocol (&gEmbeddedExternalDeviceProtocolGuid, NULL, (VOID **)&gTPS65950);
1319 ASSERT_EFI_ERROR(Status);
1320
1321 ZeroMem (&gCardInfo, sizeof (CARD_INFO));
1322
1323 Status = gBS->CreateEvent (EVT_TIMER | EVT_NOTIFY_SIGNAL, TPL_CALLBACK, TimerCallback, NULL, &gTimerEvent);
1324 ASSERT_EFI_ERROR (Status);
1325
1326 Status = gBS->SetTimer (gTimerEvent, TimerPeriodic, 1000000ULL); // make me a PCD
1327 ASSERT_EFI_ERROR (Status);
1328
1329 //Publish BlockIO.
1330 Status = gBS->InstallMultipleProtocolInterfaces (
1331 &ImageHandle,
1332 &gEfiBlockIoProtocolGuid, &gBlockIo,
1333 &gEfiDevicePathProtocolGuid, &gMmcHsDevicePath,
1334 NULL
1335 );
1336 return Status;
1337 }