]>
Commit | Line | Data |
---|---|---|
1 | /** @file | |
2 | * | |
3 | * Copyright (c) 2008 - 2009, Apple Inc. All rights reserved. | |
4 | * Copyright (c) 2011, ARM Limited. All rights reserved. | |
5 | * | |
6 | * This program and the accompanying materials | |
7 | * are licensed and made available under the terms and conditions of the BSD License | |
8 | * which accompanies this distribution. The full text of the license may be found at | |
9 | * http://opensource.org/licenses/bsd-license.php | |
10 | * | |
11 | * THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. | |
13 | * | |
14 | **/ | |
15 | ||
16 | #include "MmcHostDxe.h" | |
17 | ||
18 | EMBEDDED_EXTERNAL_DEVICE *gTPS65950; | |
19 | UINT8 mMaxDataTransferRate = 0; | |
20 | UINT32 mRca = 0; | |
21 | BOOLEAN mBitModeSet = FALSE; | |
22 | ||
23 | ||
24 | typedef struct { | |
25 | VENDOR_DEVICE_PATH Mmc; | |
26 | EFI_DEVICE_PATH End; | |
27 | } MMCHS_DEVICE_PATH; | |
28 | ||
29 | MMCHS_DEVICE_PATH gMMCDevicePath = { | |
30 | { | |
31 | HARDWARE_DEVICE_PATH, | |
32 | HW_VENDOR_DP, | |
33 | (UINT8)(sizeof(VENDOR_DEVICE_PATH)), | |
34 | (UINT8)((sizeof(VENDOR_DEVICE_PATH)) >> 8), | |
35 | 0xb615f1f5, 0x5088, 0x43cd, 0x80, 0x9c, 0xa1, 0x6e, 0x52, 0x48, 0x7d, 0x00 | |
36 | }, | |
37 | { | |
38 | END_DEVICE_PATH_TYPE, | |
39 | END_ENTIRE_DEVICE_PATH_SUBTYPE, | |
40 | sizeof (EFI_DEVICE_PATH_PROTOCOL), | |
41 | 0 | |
42 | } | |
43 | }; | |
44 | ||
45 | BOOLEAN | |
46 | IgnoreCommand ( | |
47 | UINT32 Command | |
48 | ) | |
49 | { | |
50 | switch(Command) { | |
51 | case MMC_CMD12: | |
52 | return TRUE; | |
53 | case MMC_CMD13: | |
54 | return TRUE; | |
55 | default: | |
56 | return FALSE; | |
57 | } | |
58 | } | |
59 | ||
60 | UINT32 | |
61 | TranslateCommand ( | |
62 | UINT32 Command | |
63 | ) | |
64 | { | |
65 | UINT32 Translation; | |
66 | ||
67 | switch(Command) { | |
68 | case MMC_CMD2: | |
69 | Translation = CMD2; | |
70 | break; | |
71 | case MMC_CMD3: | |
72 | Translation = CMD3; | |
73 | break; | |
74 | /*case MMC_CMD6: | |
75 | Translation = CMD6; | |
76 | break;*/ | |
77 | case MMC_CMD7: | |
78 | Translation = CMD7; | |
79 | break; | |
80 | case MMC_CMD8: | |
81 | Translation = CMD8; | |
82 | break; | |
83 | case MMC_CMD9: | |
84 | Translation = CMD9; | |
85 | break; | |
86 | /*case MMC_CMD12: | |
87 | Translation = CMD12; | |
88 | break; | |
89 | case MMC_CMD13: | |
90 | Translation = CMD13; | |
91 | break;*/ | |
92 | case MMC_CMD16: | |
93 | Translation = CMD16; | |
94 | break; | |
95 | case MMC_CMD17: | |
96 | Translation = 0x113A0014;//CMD17; | |
97 | break; | |
98 | case MMC_CMD24: | |
99 | Translation = CMD24 | 4; | |
100 | break; | |
101 | case MMC_CMD55: | |
102 | Translation = CMD55; | |
103 | break; | |
104 | case MMC_ACMD41: | |
105 | Translation = ACMD41; | |
106 | break; | |
107 | default: | |
108 | Translation = Command; | |
109 | } | |
110 | ||
111 | return Translation; | |
112 | } | |
113 | ||
114 | VOID | |
115 | CalculateCardCLKD ( | |
116 | UINTN *ClockFrequencySelect | |
117 | ) | |
118 | { | |
119 | UINTN TransferRateValue = 0; | |
120 | UINTN TimeValue = 0 ; | |
121 | UINTN Frequency = 0; | |
122 | ||
123 | DEBUG ((DEBUG_BLKIO, "CalculateCardCLKD()\n")); | |
124 | ||
125 | // For SD Cards we would need to send CMD6 to set | |
126 | // speeds abouve 25MHz. High Speed mode 50 MHz and up | |
127 | ||
128 | // Calculate Transfer rate unit (Bits 2:0 of TRAN_SPEED) | |
129 | switch (mMaxDataTransferRate & 0x7) { // 2 | |
130 | case 0: | |
131 | TransferRateValue = 100 * 1000; | |
132 | break; | |
133 | ||
134 | case 1: | |
135 | TransferRateValue = 1 * 1000 * 1000; | |
136 | break; | |
137 | ||
138 | case 2: | |
139 | TransferRateValue = 10 * 1000 * 1000; | |
140 | break; | |
141 | ||
142 | case 3: | |
143 | TransferRateValue = 100 * 1000 * 1000; | |
144 | break; | |
145 | ||
146 | default: | |
147 | DEBUG ((DEBUG_BLKIO, "Invalid parameter.\n")); | |
148 | ASSERT(FALSE); | |
149 | return; | |
150 | } | |
151 | ||
152 | //Calculate Time value (Bits 6:3 of TRAN_SPEED) | |
153 | switch ((mMaxDataTransferRate >> 3) & 0xF) { // 6 | |
154 | case 1: | |
155 | TimeValue = 10; | |
156 | break; | |
157 | ||
158 | case 2: | |
159 | TimeValue = 12; | |
160 | break; | |
161 | ||
162 | case 3: | |
163 | TimeValue = 13; | |
164 | break; | |
165 | ||
166 | case 4: | |
167 | TimeValue = 15; | |
168 | break; | |
169 | ||
170 | case 5: | |
171 | TimeValue = 20; | |
172 | break; | |
173 | ||
174 | case 6: | |
175 | TimeValue = 25; | |
176 | break; | |
177 | ||
178 | case 7: | |
179 | TimeValue = 30; | |
180 | break; | |
181 | ||
182 | case 8: | |
183 | TimeValue = 35; | |
184 | break; | |
185 | ||
186 | case 9: | |
187 | TimeValue = 40; | |
188 | break; | |
189 | ||
190 | case 10: | |
191 | TimeValue = 45; | |
192 | break; | |
193 | ||
194 | case 11: | |
195 | TimeValue = 50; | |
196 | break; | |
197 | ||
198 | case 12: | |
199 | TimeValue = 55; | |
200 | break; | |
201 | ||
202 | case 13: | |
203 | TimeValue = 60; | |
204 | break; | |
205 | ||
206 | case 14: | |
207 | TimeValue = 70; | |
208 | break; | |
209 | ||
210 | case 15: | |
211 | TimeValue = 80; | |
212 | break; | |
213 | ||
214 | default: | |
215 | DEBUG ((DEBUG_BLKIO, "Invalid parameter.\n")); | |
216 | ASSERT(FALSE); | |
217 | return; | |
218 | } | |
219 | ||
220 | Frequency = TransferRateValue * TimeValue/10; | |
221 | ||
222 | // Calculate Clock divider value to program in MMCHS_SYSCTL[CLKD] field. | |
223 | *ClockFrequencySelect = ((MMC_REFERENCE_CLK/Frequency) + 1); | |
224 | ||
225 | DEBUG ((DEBUG_BLKIO, "mMaxDataTransferRate: 0x%x, Frequency: %d KHz, ClockFrequencySelect: %x\n", mMaxDataTransferRate, Frequency/1000, *ClockFrequencySelect)); | |
226 | } | |
227 | ||
228 | VOID | |
229 | UpdateMMCHSClkFrequency ( | |
230 | UINTN NewCLKD | |
231 | ) | |
232 | { | |
233 | DEBUG ((DEBUG_BLKIO, "UpdateMMCHSClkFrequency()\n")); | |
234 | ||
235 | // Set Clock enable to 0x0 to not provide the clock to the card | |
236 | MmioAnd32 (MMCHS_SYSCTL, ~CEN); | |
237 | ||
238 | // Set new clock frequency. | |
239 | MmioAndThenOr32 (MMCHS_SYSCTL, ~CLKD_MASK, NewCLKD << 6); | |
240 | ||
241 | // Poll till Internal Clock Stable | |
242 | while ((MmioRead32 (MMCHS_SYSCTL) & ICS_MASK) != ICS); | |
243 | ||
244 | // Set Clock enable to 0x1 to provide the clock to the card | |
245 | MmioOr32 (MMCHS_SYSCTL, CEN); | |
246 | } | |
247 | ||
248 | EFI_STATUS | |
249 | InitializeMMCHS ( | |
250 | VOID | |
251 | ) | |
252 | { | |
253 | UINT8 Data; | |
254 | EFI_STATUS Status; | |
255 | ||
256 | DEBUG ((DEBUG_BLKIO, "InitializeMMCHS()\n")); | |
257 | ||
258 | // Select Device group to belong to P1 device group in Power IC. | |
259 | Data = DEV_GRP_P1; | |
260 | Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEV_GRP), 1, &Data); | |
261 | ASSERT_EFI_ERROR(Status); | |
262 | ||
263 | // Configure voltage regulator for MMC1 in Power IC to output 3.0 voltage. | |
264 | Data = VSEL_3_00V; | |
265 | Status = gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID4, VMMC1_DEDICATED_REG), 1, &Data); | |
266 | ASSERT_EFI_ERROR(Status); | |
267 | ||
268 | // After ramping up voltage, set VDDS stable bit to indicate that voltage level is stable. | |
269 | MmioOr32 (CONTROL_PBIAS_LITE, (PBIASLITEVMODE0 | PBIASLITEPWRDNZ0 | PBIASSPEEDCTRL0 | PBIASLITEVMODE1 | PBIASLITEWRDNZ1)); | |
270 | ||
271 | // Enable WP GPIO | |
272 | MmioAndThenOr32 (GPIO1_BASE + GPIO_OE, ~BIT23, BIT23); | |
273 | ||
274 | // Enable Card Detect | |
275 | Data = CARD_DETECT_ENABLE; | |
276 | gTPS65950->Write (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, TPS65950_GPIO_CTRL), 1, &Data); | |
277 | ||
278 | return Status; | |
279 | } | |
280 | ||
281 | BOOLEAN | |
282 | MMCIsCardPresent ( | |
283 | IN EFI_MMC_HOST_PROTOCOL *This | |
284 | ) | |
285 | { | |
286 | EFI_STATUS Status; | |
287 | UINT8 Data; | |
288 | ||
289 | // | |
290 | // Card detect is a GPIO0 on the TPS65950 | |
291 | // | |
292 | Status = gTPS65950->Read (gTPS65950, EXTERNAL_DEVICE_REGISTER(I2C_ADDR_GRP_ID2, GPIODATAIN1), 1, &Data); | |
293 | if (EFI_ERROR (Status)) { | |
294 | return FALSE; | |
295 | } | |
296 | ||
297 | return !(Data & CARD_DETECT_BIT); | |
298 | } | |
299 | ||
300 | BOOLEAN | |
301 | MMCIsReadOnly ( | |
302 | IN EFI_MMC_HOST_PROTOCOL *This | |
303 | ) | |
304 | { | |
305 | /* Note: | |
306 | * On our BeagleBoard the SD card WP pin is always read as TRUE. | |
307 | * Probably something wrong with GPIO configuration. | |
308 | * BeagleBoard-xM uses microSD cards so there is no write protect at all. | |
309 | * Hence commenting out SD card WP pin read status. | |
310 | */ | |
311 | //return (MmioRead32 (GPIO1_BASE + GPIO_DATAIN) & BIT23) == BIT23; | |
312 | return 0; | |
313 | ||
314 | } | |
315 | ||
316 | // TODO | |
317 | EFI_GUID mPL180MciDevicePathGuid = EFI_CALLER_ID_GUID; | |
318 | ||
319 | EFI_STATUS | |
320 | MMCBuildDevicePath ( | |
321 | IN EFI_MMC_HOST_PROTOCOL *This, | |
322 | IN EFI_DEVICE_PATH_PROTOCOL **DevicePath | |
323 | ) | |
324 | { | |
325 | EFI_DEVICE_PATH_PROTOCOL *NewDevicePathNode; | |
326 | ||
327 | NewDevicePathNode = CreateDeviceNode(HARDWARE_DEVICE_PATH,HW_VENDOR_DP,sizeof(VENDOR_DEVICE_PATH)); | |
328 | CopyGuid(&((VENDOR_DEVICE_PATH*)NewDevicePathNode)->Guid,&mPL180MciDevicePathGuid); | |
329 | *DevicePath = NewDevicePathNode; | |
330 | return EFI_SUCCESS; | |
331 | } | |
332 | ||
333 | EFI_STATUS | |
334 | MMCSendCommand ( | |
335 | IN EFI_MMC_HOST_PROTOCOL *This, | |
336 | IN MMC_CMD MmcCmd, | |
337 | IN UINT32 Argument | |
338 | ) | |
339 | { | |
340 | UINTN MmcStatus; | |
341 | UINTN RetryCount = 0; | |
342 | ||
343 | if (IgnoreCommand(MmcCmd)) | |
344 | return EFI_SUCCESS; | |
345 | ||
346 | MmcCmd = TranslateCommand(MmcCmd); | |
347 | ||
348 | //DEBUG ((EFI_D_ERROR, "MMCSendCommand(%d)\n", MmcCmd)); | |
349 | ||
350 | // Check if command line is in use or not. Poll till command line is available. | |
351 | while ((MmioRead32 (MMCHS_PSTATE) & DATI_MASK) == DATI_NOT_ALLOWED); | |
352 | ||
353 | // Provide the block size. | |
354 | MmioWrite32 (MMCHS_BLK, BLEN_512BYTES); | |
355 | ||
356 | // Setting Data timeout counter value to max value. | |
357 | MmioAndThenOr32 (MMCHS_SYSCTL, ~DTO_MASK, DTO_VAL); | |
358 | ||
359 | // Clear Status register. | |
360 | MmioWrite32 (MMCHS_STAT, 0xFFFFFFFF); | |
361 | ||
362 | // Set command argument register | |
363 | MmioWrite32 (MMCHS_ARG, Argument); | |
364 | ||
365 | //TODO: fix this | |
366 | //Enable interrupt enable events to occur | |
367 | //MmioWrite32 (MMCHS_IE, CmdInterruptEnableVal); | |
368 | ||
369 | // Send a command | |
370 | MmioWrite32 (MMCHS_CMD, MmcCmd); | |
371 | ||
372 | // Check for the command status. | |
373 | while (RetryCount < MAX_RETRY_COUNT) { | |
374 | do { | |
375 | MmcStatus = MmioRead32 (MMCHS_STAT); | |
376 | } while (MmcStatus == 0); | |
377 | ||
378 | // Read status of command response | |
379 | if ((MmcStatus & ERRI) != 0) { | |
380 | ||
381 | // Perform soft-reset for mmci_cmd line. | |
382 | MmioOr32 (MMCHS_SYSCTL, SRC); | |
383 | while ((MmioRead32 (MMCHS_SYSCTL) & SRC)); | |
384 | ||
385 | //DEBUG ((EFI_D_INFO, "MmcStatus: 0x%x\n", MmcStatus)); | |
386 | return EFI_DEVICE_ERROR; | |
387 | } | |
388 | ||
389 | // Check if command is completed. | |
390 | if ((MmcStatus & CC) == CC) { | |
391 | MmioWrite32 (MMCHS_STAT, CC); | |
392 | break; | |
393 | } | |
394 | ||
395 | RetryCount++; | |
396 | } | |
397 | ||
398 | if (RetryCount == MAX_RETRY_COUNT) { | |
399 | DEBUG ((DEBUG_BLKIO, "MMCSendCommand: Timeout\n")); | |
400 | return EFI_TIMEOUT; | |
401 | } | |
402 | ||
403 | return EFI_SUCCESS; | |
404 | } | |
405 | ||
406 | EFI_STATUS | |
407 | MMCNotifyState ( | |
408 | IN EFI_MMC_HOST_PROTOCOL *This, | |
409 | IN MMC_STATE State | |
410 | ) | |
411 | { | |
412 | EFI_STATUS Status; | |
413 | UINTN FreqSel; | |
414 | ||
415 | switch(State) { | |
416 | case MmcInvalidState: | |
417 | ASSERT(0); | |
418 | break; | |
419 | case MmcHwInitializationState: | |
420 | mBitModeSet = FALSE; | |
421 | ||
422 | DEBUG ((DEBUG_BLKIO, "MMCHwInitializationState()\n")); | |
423 | Status = InitializeMMCHS (); | |
424 | if (EFI_ERROR(Status)) { | |
425 | DEBUG ((DEBUG_BLKIO, "Initialize MMC host controller fails. Status: %x\n", Status)); | |
426 | return Status; | |
427 | } | |
428 | ||
429 | // Software reset of the MMCHS host controller. | |
430 | MmioWrite32 (MMCHS_SYSCONFIG, SOFTRESET); | |
431 | gBS->Stall(1000); | |
432 | while ((MmioRead32 (MMCHS_SYSSTATUS) & RESETDONE_MASK) != RESETDONE); | |
433 | ||
434 | // Soft reset for all. | |
435 | MmioWrite32 (MMCHS_SYSCTL, SRA); | |
436 | gBS->Stall(1000); | |
437 | while ((MmioRead32 (MMCHS_SYSCTL) & SRA) != 0x0); | |
438 | ||
439 | //Voltage capabilities initialization. Activate VS18 and VS30. | |
440 | MmioOr32 (MMCHS_CAPA, (VS30 | VS18)); | |
441 | ||
442 | // Wakeup configuration | |
443 | MmioOr32 (MMCHS_SYSCONFIG, ENAWAKEUP); | |
444 | MmioOr32 (MMCHS_HCTL, IWE); | |
445 | ||
446 | // MMCHS Controller default initialization | |
447 | MmioOr32 (MMCHS_CON, (OD | DW8_1_4_BIT | CEATA_OFF)); | |
448 | ||
449 | MmioWrite32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_OFF)); | |
450 | ||
451 | // Enable internal clock | |
452 | MmioOr32 (MMCHS_SYSCTL, ICE); | |
453 | ||
454 | // Set the clock frequency to 80KHz. | |
455 | UpdateMMCHSClkFrequency (CLKD_80KHZ); | |
456 | ||
457 | // Enable SD bus power. | |
458 | MmioOr32 (MMCHS_HCTL, (SDBP_ON)); | |
459 | ||
460 | // Poll till SD bus power bit is set. | |
461 | while ((MmioRead32 (MMCHS_HCTL) & SDBP_MASK) != SDBP_ON); | |
462 | ||
463 | // Enable interrupts. | |
464 | MmioWrite32 (MMCHS_IE, (BADA_EN | CERR_EN | DEB_EN | DCRC_EN | DTO_EN | CIE_EN | | |
465 | CEB_EN | CCRC_EN | CTO_EN | BRR_EN | BWR_EN | TC_EN | CC_EN)); | |
466 | ||
467 | // Controller INIT procedure start. | |
468 | MmioOr32 (MMCHS_CON, INIT); | |
469 | MmioWrite32 (MMCHS_CMD, 0x00000000); | |
470 | while (!(MmioRead32 (MMCHS_STAT) & CC)); | |
471 | ||
472 | // Wait for 1 ms | |
473 | gBS->Stall (1000); | |
474 | ||
475 | // Set CC bit to 0x1 to clear the flag | |
476 | MmioOr32 (MMCHS_STAT, CC); | |
477 | ||
478 | // Retry INIT procedure. | |
479 | MmioWrite32 (MMCHS_CMD, 0x00000000); | |
480 | while (!(MmioRead32 (MMCHS_STAT) & CC)); | |
481 | ||
482 | // End initialization sequence | |
483 | MmioAnd32 (MMCHS_CON, ~INIT); | |
484 | ||
485 | MmioOr32 (MMCHS_HCTL, (SDVS_3_0_V | DTW_1_BIT | SDBP_ON)); | |
486 | ||
487 | // Change clock frequency to 400KHz to fit protocol | |
488 | UpdateMMCHSClkFrequency(CLKD_400KHZ); | |
489 | ||
490 | MmioOr32 (MMCHS_CON, OD); | |
491 | break; | |
492 | case MmcIdleState: | |
493 | break; | |
494 | case MmcReadyState: | |
495 | break; | |
496 | case MmcIdentificationState: | |
497 | break; | |
498 | case MmcStandByState: | |
499 | CalculateCardCLKD (&FreqSel); | |
500 | UpdateMMCHSClkFrequency (FreqSel); | |
501 | break; | |
502 | case MmcTransferState: | |
503 | if (!mBitModeSet) { | |
504 | Status = MMCSendCommand (This, CMD55, mRca << 16); | |
505 | if (!EFI_ERROR (Status)) { | |
506 | // Set device into 4-bit data bus mode | |
507 | Status = MMCSendCommand (This, ACMD6, 0x2); | |
508 | if (!EFI_ERROR (Status)) { | |
509 | // Set host controler into 4-bit mode | |
510 | MmioOr32 (MMCHS_HCTL, DTW_4_BIT); | |
511 | DEBUG ((DEBUG_BLKIO, "SD Memory Card set to 4-bit mode\n")); | |
512 | mBitModeSet = TRUE; | |
513 | } | |
514 | } | |
515 | } | |
516 | break; | |
517 | case MmcSendingDataState: | |
518 | break; | |
519 | case MmcReceiveDataState: | |
520 | break; | |
521 | case MmcProgrammingState: | |
522 | break; | |
523 | case MmcDisconnectState: | |
524 | default: | |
525 | ASSERT(0); | |
526 | } | |
527 | return EFI_SUCCESS; | |
528 | } | |
529 | ||
530 | EFI_STATUS | |
531 | MMCReceiveResponse ( | |
532 | IN EFI_MMC_HOST_PROTOCOL *This, | |
533 | IN MMC_RESPONSE_TYPE Type, | |
534 | IN UINT32* Buffer | |
535 | ) | |
536 | { | |
537 | if (Buffer == NULL) { | |
538 | return EFI_INVALID_PARAMETER; | |
539 | } | |
540 | ||
541 | if (Type == MMC_RESPONSE_TYPE_R2) { | |
542 | Buffer[0] = MmioRead32 (MMCHS_RSP10); | |
543 | Buffer[1] = MmioRead32 (MMCHS_RSP32); | |
544 | Buffer[2] = MmioRead32 (MMCHS_RSP54); | |
545 | Buffer[3] = MmioRead32 (MMCHS_RSP76); | |
546 | } else { | |
547 | Buffer[0] = MmioRead32 (MMCHS_RSP10); | |
548 | } | |
549 | ||
550 | if (Type == MMC_RESPONSE_TYPE_CSD) { | |
551 | mMaxDataTransferRate = Buffer[3] & 0xFF; | |
552 | } else if (Type == MMC_RESPONSE_TYPE_RCA) { | |
553 | mRca = Buffer[0] >> 16; | |
554 | } | |
555 | ||
556 | return EFI_SUCCESS; | |
557 | } | |
558 | ||
559 | EFI_STATUS | |
560 | MMCReadBlockData ( | |
561 | IN EFI_MMC_HOST_PROTOCOL *This, | |
562 | IN EFI_LBA Lba, | |
563 | IN UINTN Length, | |
564 | IN UINT32* Buffer | |
565 | ) | |
566 | { | |
567 | UINTN MmcStatus; | |
568 | UINTN Count; | |
569 | UINTN RetryCount = 0; | |
570 | ||
571 | DEBUG ((DEBUG_BLKIO, "MMCReadBlockData(LBA: 0x%x, Length: 0x%x, Buffer: 0x%x)\n", Lba, Length, Buffer)); | |
572 | ||
573 | // Check controller status to make sure there is no error. | |
574 | while (RetryCount < MAX_RETRY_COUNT) { | |
575 | do { | |
576 | // Read Status. | |
577 | MmcStatus = MmioRead32 (MMCHS_STAT); | |
578 | } while(MmcStatus == 0); | |
579 | ||
580 | // Check if Buffer read ready (BRR) bit is set? | |
581 | if (MmcStatus & BRR) { | |
582 | ||
583 | // Clear BRR bit | |
584 | MmioOr32 (MMCHS_STAT, BRR); | |
585 | ||
586 | for (Count = 0; Count < Length / 4; Count++) { | |
587 | *Buffer++ = MmioRead32(MMCHS_DATA); | |
588 | } | |
589 | break; | |
590 | } | |
591 | RetryCount++; | |
592 | } | |
593 | ||
594 | if (RetryCount == MAX_RETRY_COUNT) { | |
595 | return EFI_TIMEOUT; | |
596 | } | |
597 | ||
598 | return EFI_SUCCESS; | |
599 | } | |
600 | ||
601 | EFI_STATUS | |
602 | MMCWriteBlockData ( | |
603 | IN EFI_MMC_HOST_PROTOCOL *This, | |
604 | IN EFI_LBA Lba, | |
605 | IN UINTN Length, | |
606 | IN UINT32* Buffer | |
607 | ) | |
608 | { | |
609 | UINTN MmcStatus; | |
610 | UINTN Count; | |
611 | UINTN RetryCount = 0; | |
612 | ||
613 | // Check controller status to make sure there is no error. | |
614 | while (RetryCount < MAX_RETRY_COUNT) { | |
615 | do { | |
616 | // Read Status. | |
617 | MmcStatus = MmioRead32 (MMCHS_STAT); | |
618 | } while(MmcStatus == 0); | |
619 | ||
620 | // Check if Buffer write ready (BWR) bit is set? | |
621 | if (MmcStatus & BWR) { | |
622 | ||
623 | // Clear BWR bit | |
624 | MmioOr32 (MMCHS_STAT, BWR); | |
625 | ||
626 | // Write block worth of data. | |
627 | for (Count = 0; Count < Length / 4; Count++) { | |
628 | MmioWrite32 (MMCHS_DATA, *Buffer++); | |
629 | } | |
630 | ||
631 | break; | |
632 | } | |
633 | RetryCount++; | |
634 | } | |
635 | ||
636 | if (RetryCount == MAX_RETRY_COUNT) { | |
637 | return EFI_TIMEOUT; | |
638 | } | |
639 | ||
640 | return EFI_SUCCESS; | |
641 | } | |
642 | ||
643 | EFI_MMC_HOST_PROTOCOL gMMCHost = { | |
644 | MMC_HOST_PROTOCOL_REVISION, | |
645 | MMCIsCardPresent, | |
646 | MMCIsReadOnly, | |
647 | MMCBuildDevicePath, | |
648 | MMCNotifyState, | |
649 | MMCSendCommand, | |
650 | MMCReceiveResponse, | |
651 | MMCReadBlockData, | |
652 | MMCWriteBlockData | |
653 | }; | |
654 | ||
655 | EFI_STATUS | |
656 | MMCInitialize ( | |
657 | IN EFI_HANDLE ImageHandle, | |
658 | IN EFI_SYSTEM_TABLE *SystemTable | |
659 | ) | |
660 | { | |
661 | EFI_STATUS Status; | |
662 | EFI_HANDLE Handle = NULL; | |
663 | ||
664 | DEBUG ((DEBUG_BLKIO, "MMCInitialize()\n")); | |
665 | ||
666 | Status = gBS->LocateProtocol (&gEmbeddedExternalDeviceProtocolGuid, NULL, (VOID **)&gTPS65950); | |
667 | ASSERT_EFI_ERROR(Status); | |
668 | ||
669 | Status = gBS->InstallMultipleProtocolInterfaces ( | |
670 | &Handle, | |
671 | &gEfiMmcHostProtocolGuid, &gMMCHost, | |
672 | NULL | |
673 | ); | |
674 | ASSERT_EFI_ERROR (Status); | |
675 | ||
676 | return Status; | |
677 | } |