summaryrefslogtreecommitdiffstats
path: root/target/linux/at91/image/dfboot/src/mci_device.c
blob: cce74a3ae8476d6605d5769dce86ae841f03a458 (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
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
//*----------------------------------------------------------------------------
//*         ATMEL Microcontroller Software Support  -  ROUSSET  -
//*----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*----------------------------------------------------------------------------
//* File Name           : mci_device.c
//* Object              : TEST DataFlash Functions
//* Creation            : FB   26/11/2002
//*
//*----------------------------------------------------------------------------

#include <AT91C_MCI_Device.h>
#include "stdio.h"

#define AT91C_MCI_TIMEOUT			1000000   /* For AT91F_MCIDeviceWaitReady */
#define BUFFER_SIZE_MCI_DEVICE		512
#define MASTER_CLOCK				60000000
#define FALSE						0
#define TRUE						1

//* External Functions
extern void AT91F_ASM_MCI_Handler(void);
//* Global Variables
AT91S_MciDeviceFeatures			MCI_Device_Features;
AT91S_MciDeviceDesc				MCI_Device_Desc;
AT91S_MciDevice					MCI_Device;

#undef ENABLE_WRITE
#undef MMC

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SendCommand
//* \brief Generic function to send a command to the MMC or SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SendCommand (
	AT91PS_MciDevice pMCI_Device,
	unsigned int Cmd,
	unsigned int Arg)
{
	unsigned int	error,status;
	//unsigned int	tick=0;

    // Send the command
    AT91C_BASE_MCI->MCI_ARGR = Arg;
    AT91C_BASE_MCI->MCI_CMDR = Cmd;

	// wait for CMDRDY Status flag to read the response
	do
	{
		status = AT91C_BASE_MCI->MCI_SR;
		//tick++;
	}
	while( !(status & AT91C_MCI_CMDRDY) );//&& (tick<100) );

    // Test error  ==> if crc error and response R3 ==> don't check error
    error = (AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR;
	if(error != 0 )
	{
		// if the command is SEND_OP_COND the CRC error flag is always present (cf : R3 response)
		if ( (Cmd != AT91C_SDCARD_APP_OP_COND_CMD) && (Cmd != AT91C_MMC_SEND_OP_COND_CMD) )
			return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);
		else
		{
			if (error != AT91C_MCI_RCRCE)
				return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);
		}
	}
    return AT91C_CMD_SEND_OK;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SDCard_SendAppCommand
//* \brief Specific function to send a specific command to the SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_SendAppCommand (
	AT91PS_MciDevice pMCI_Device,
	unsigned int Cmd_App,
	unsigned int Arg	)
{
	unsigned int status;
	//unsigned int	tick=0;

	// Send the CMD55 for application specific command
    AT91C_BASE_MCI->MCI_ARGR = (pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address << 16 );
    AT91C_BASE_MCI->MCI_CMDR = AT91C_APP_CMD;

	// wait for CMDRDY Status flag to read the response
	do
	{
		status = AT91C_BASE_MCI->MCI_SR;
		//tick++;
	}
	while( !(status & AT91C_MCI_CMDRDY) );//&& (tick<100) );	

    // if an error occurs
    if (((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR) != 0 )
		return ((AT91C_BASE_MCI->MCI_SR) & AT91C_MCI_SR_ERROR);

    // check if it is a specific command and then send the command
	if ( (Cmd_App && AT91C_SDCARD_APP_ALL_CMD) == 0)
		return AT91C_CMD_SEND_ERROR;

   return( AT91F_MCI_SendCommand(pMCI_Device,Cmd_App,Arg) );
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_GetStatus
//* \brief Addressed card sends its status register
//*----------------------------------------------------------------------------
int AT91F_MCI_GetStatus(AT91PS_MciDevice pMCI_Device,unsigned int relative_card_address)
{
	if (AT91F_MCI_SendCommand(pMCI_Device,
								AT91C_SEND_STATUS_CMD,
								relative_card_address <<16) == AT91C_CMD_SEND_OK)
    	return (AT91C_BASE_MCI->MCI_RSPR[0]);

    return AT91C_CMD_SEND_ERROR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_Device_Handler
//* \brief MCI C interrupt handler
//*----------------------------------------------------------------------------
void AT91F_MCI_Device_Handler(
	AT91PS_MciDevice pMCI_Device,
	unsigned int status)
{
	// If End of Tx Buffer Empty interrupt occurred
	if ( status & AT91C_MCI_TXBUFE )
    {
		AT91C_BASE_MCI->MCI_IDR = AT91C_MCI_TXBUFE;
 		AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_TXTDIS;
        	
		pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_IDLE;
	}	// End of if AT91C_MCI_TXBUFF		
	
    // If End of Rx Buffer Full interrupt occurred
    if ( status & AT91C_MCI_RXBUFF )
    {        
       	AT91C_BASE_MCI->MCI_IDR = AT91C_MCI_RXBUFF;
 		AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_RXTDIS;
	
		pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_IDLE;
	}	// End of if AT91C_MCI_RXBUFF

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_Handler
//* \brief MCI Handler
//*----------------------------------------------------------------------------
void AT91F_MCI_Handler(void)
{
	int status;

	status = ( AT91C_BASE_MCI->MCI_SR & AT91C_BASE_MCI->MCI_IMR );

	AT91F_MCI_Device_Handler(&MCI_Device,status);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_ReadBlock
//* \brief Read an ENTIRE block or PARTIAL block
//*----------------------------------------------------------------------------
int AT91F_MCI_ReadBlock(
	AT91PS_MciDevice pMCI_Device,
	int src,
	unsigned int *dataBuffer,
	int sizeToRead )
{
    ////////////////////////////////////////////////////////////////////////////////////////////
    if(pMCI_Device->pMCI_DeviceDesc->state != AT91C_MCI_IDLE)
    	return AT91C_READ_ERROR;
    
    if( (AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address) & AT91C_SR_READY_FOR_DATA) != AT91C_SR_READY_FOR_DATA)
    	return AT91C_READ_ERROR;
    	
    if ( (src + sizeToRead) > pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity )
		return AT91C_READ_ERROR;

    // If source does not fit a begin of a block
	if ( (src % pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) != 0 )
		return AT91C_READ_ERROR;
   
     // Test if the MMC supports Partial Read Block
     // ALWAYS SUPPORTED IN SD Memory Card
     if( (sizeToRead < pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) 
    	&& (pMCI_Device->pMCI_DeviceFeatures->Read_Partial == 0x00) )
   		return AT91C_READ_ERROR;
   		
    if( sizeToRead > pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length)
   		return AT91C_READ_ERROR;
    ////////////////////////////////////////////////////////////////////////////////////////////
      
    // Init Mode Register
	AT91C_BASE_MCI->MCI_MR |= ((pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length << 16) | AT91C_MCI_PDCMODE);
	 
    if (sizeToRead %4)
		sizeToRead = (sizeToRead /4)+1;
	else
		sizeToRead = sizeToRead/4;

	AT91C_BASE_PDC_MCI->PDC_PTCR = (AT91C_PDC_TXTDIS | AT91C_PDC_RXTDIS);
    AT91C_BASE_PDC_MCI->PDC_RPR  = (unsigned int)dataBuffer;
    AT91C_BASE_PDC_MCI->PDC_RCR  = sizeToRead;

	// Send the Read single block command
    if ( AT91F_MCI_SendCommand(pMCI_Device, AT91C_READ_SINGLE_BLOCK_CMD, src) != AT91C_CMD_SEND_OK )
    	return AT91C_READ_ERROR;

	pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_RX_SINGLE_BLOCK;

	// Enable AT91C_MCI_RXBUFF Interrupt
    AT91C_BASE_MCI->MCI_IER = AT91C_MCI_RXBUFF;

	// (PDC) Receiver Transfer Enable
	AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_RXTEN;
	
	return AT91C_READ_OK;
}


#ifdef ENABLE_WRITE
//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_WriteBlock
//* \brief  Write an ENTIRE block but not always PARTIAL block !!!
//*----------------------------------------------------------------------------
int AT91F_MCI_WriteBlock(
	AT91PS_MciDevice pMCI_Device,
	int dest,
	unsigned int *dataBuffer,
	int sizeToWrite )
{
    ////////////////////////////////////////////////////////////////////////////////////////////
	if( pMCI_Device->pMCI_DeviceDesc->state != AT91C_MCI_IDLE)
    	return AT91C_WRITE_ERROR;
    
    if( (AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address) & AT91C_SR_READY_FOR_DATA) != AT91C_SR_READY_FOR_DATA)
    	return AT91C_WRITE_ERROR;
    	
    if ( (dest + sizeToWrite) > pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity )
		return AT91C_WRITE_ERROR;

    // If source does not fit a begin of a block
	if ( (dest % pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) != 0 )
		return AT91C_WRITE_ERROR;
   
    // Test if the MMC supports Partial Write Block 
    if( (sizeToWrite < pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length) 
    	&& (pMCI_Device->pMCI_DeviceFeatures->Write_Partial == 0x00) )
   		return AT91C_WRITE_ERROR;
   		
   	if( sizeToWrite > pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length )
   		return AT91C_WRITE_ERROR;
    ////////////////////////////////////////////////////////////////////////////////////////////
  
    // Init Mode Register
	AT91C_BASE_MCI->MCI_MR |= ((pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length << 16) | AT91C_MCI_PDCMODE);
	
	if (sizeToWrite %4)
		sizeToWrite = (sizeToWrite /4)+1;
	else
		sizeToWrite = sizeToWrite/4;

	// Init PDC for write sequence
    AT91C_BASE_PDC_MCI->PDC_PTCR = (AT91C_PDC_TXTDIS | AT91C_PDC_RXTDIS);
    AT91C_BASE_PDC_MCI->PDC_TPR = (unsigned int) dataBuffer;
    AT91C_BASE_PDC_MCI->PDC_TCR = sizeToWrite;

	// Send the write single block command
    if ( AT91F_MCI_SendCommand(pMCI_Device, AT91C_WRITE_BLOCK_CMD, dest) != AT91C_CMD_SEND_OK)
    	return AT91C_WRITE_ERROR;

	pMCI_Device->pMCI_DeviceDesc->state = AT91C_MCI_TX_SINGLE_BLOCK;

	// Enable AT91C_MCI_TXBUFE Interrupt
    AT91C_BASE_MCI->MCI_IER = AT91C_MCI_TXBUFE;
  
  	// Enables TX for PDC transfert requests
    AT91C_BASE_PDC_MCI->PDC_PTCR = AT91C_PDC_TXTEN;
  
	return AT91C_WRITE_OK;
}
#endif

#ifdef MMC
//*------------------------------------------------------------------------------------------------------------
//* \fn    AT91F_MCI_MMC_SelectCard
//* \brief Toggles a card between the Stand_by and Transfer states or between Programming and Disconnect states
//*------------------------------------------------------------------------------------------------------------
int AT91F_MCI_MMC_SelectCard(AT91PS_MciDevice pMCI_Device, unsigned int relative_card_address)
{
    int status;
	
	//* Check if the MMC card chosen is already the selected one
	status = AT91F_MCI_GetStatus(pMCI_Device,relative_card_address);

	if (status < 0)
		return AT91C_CARD_SELECTED_ERROR;

	if ((status & AT91C_SR_CARD_SELECTED) == AT91C_SR_CARD_SELECTED)
		return AT91C_CARD_SELECTED_OK;

	//* Search for the MMC Card to be selected, status = the Corresponding Device Number
	status = 0;
	while( (pMCI_Device->pMCI_DeviceFeatures[status].Relative_Card_Address != relative_card_address)
		   && (status < AT91C_MAX_MCI_CARDS) )
		status++;

	if (status > AT91C_MAX_MCI_CARDS)
    	return AT91C_CARD_SELECTED_ERROR;

    if (AT91F_MCI_SendCommand( pMCI_Device,
    								   AT91C_SEL_DESEL_CARD_CMD,
    								   pMCI_Device->pMCI_DeviceFeatures[status].Relative_Card_Address << 16) == AT91C_CMD_SEND_OK)
    	return AT91C_CARD_SELECTED_OK;
    return AT91C_CARD_SELECTED_ERROR;
}
#endif

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_GetCSD
//* \brief Asks to the specified card to send its CSD
//*----------------------------------------------------------------------------
int AT91F_MCI_GetCSD (AT91PS_MciDevice pMCI_Device, unsigned int relative_card_address , unsigned int * response)
{
 	
 	if(AT91F_MCI_SendCommand(pMCI_Device,
								  AT91C_SEND_CSD_CMD,
								  (relative_card_address << 16)) != AT91C_CMD_SEND_OK)
		return AT91C_CMD_SEND_ERROR;
	
    response[0] = AT91C_BASE_MCI->MCI_RSPR[0];
   	response[1] = AT91C_BASE_MCI->MCI_RSPR[1];
    response[2] = AT91C_BASE_MCI->MCI_RSPR[2];
    response[3] = AT91C_BASE_MCI->MCI_RSPR[3];
    
    return AT91C_CMD_SEND_OK;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SetBlocklength
//* \brief Select a block length for all following block commands (R/W)
//*----------------------------------------------------------------------------
int AT91F_MCI_SetBlocklength(AT91PS_MciDevice pMCI_Device,unsigned int length)
{
    return( AT91F_MCI_SendCommand(pMCI_Device, AT91C_SET_BLOCKLEN_CMD, length) );
}

#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_MMC_GetAllOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_GetAllOCR (AT91PS_MciDevice pMCI_Device)
{
	unsigned int	response =0x0;
 	
 	while(1)
    {
    	response = AT91F_MCI_SendCommand(pMCI_Device,
  										AT91C_MMC_SEND_OP_COND_CMD,
  										AT91C_MMC_HOST_VOLTAGE_RANGE);
		if (response != AT91C_CMD_SEND_OK)
			return AT91C_INIT_ERROR;
		
		response = AT91C_BASE_MCI->MCI_RSPR[0];
		
		if ( (response & AT91C_CARD_POWER_UP_BUSY) == AT91C_CARD_POWER_UP_BUSY)
			return(response);	
	}
}
#endif

#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_MMC_GetAllCID
//* \brief Asks to the MMC on the chosen slot to send its CID
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_GetAllCID (AT91PS_MciDevice pMCI_Device, unsigned int *response)
{
	int Nb_Cards_Found=-1;
  
	while(1)
	{
	 	if(AT91F_MCI_SendCommand(pMCI_Device,
								AT91C_MMC_ALL_SEND_CID_CMD,
								AT91C_NO_ARGUMENT) != AT91C_CMD_SEND_OK)
			return Nb_Cards_Found;
		else
		{		
			Nb_Cards_Found = 0;
			//* Assignation of the relative address to the MMC CARD
			pMCI_Device->pMCI_DeviceFeatures[Nb_Cards_Found].Relative_Card_Address = Nb_Cards_Found + AT91C_FIRST_RCA;
			//* Set the insert flag
			pMCI_Device->pMCI_DeviceFeatures[Nb_Cards_Found].Card_Inserted = AT91C_MMC_CARD_INSERTED;
	
			if (AT91F_MCI_SendCommand(pMCI_Device,
									 AT91C_MMC_SET_RELATIVE_ADDR_CMD,
									 (Nb_Cards_Found + AT91C_FIRST_RCA) << 16) != AT91C_CMD_SEND_OK)
				return AT91C_CMD_SEND_ERROR;
				 
			//* If no error during assignation address ==> Increment Nb_cards_Found
			Nb_Cards_Found++ ;
		}
	}
}
#endif
#ifdef MMC
//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_MMC_Init
//* \brief Return the MMC initialisation status
//*----------------------------------------------------------------------------
int AT91F_MCI_MMC_Init (AT91PS_MciDevice pMCI_Device)
{
    unsigned int	tab_response[4];
	unsigned int	mult,blocknr;
	unsigned int 	i,Nb_Cards_Found=0;

	//* Resets all MMC Cards in Idle state
	AT91F_MCI_SendCommand(pMCI_Device, AT91C_MMC_GO_IDLE_STATE_CMD, AT91C_NO_ARGUMENT);

    if(AT91F_MCI_MMC_GetAllOCR(pMCI_Device) == AT91C_INIT_ERROR)
    	return AT91C_INIT_ERROR;

	Nb_Cards_Found = AT91F_MCI_MMC_GetAllCID(pMCI_Device,tab_response);
	if (Nb_Cards_Found != AT91C_CMD_SEND_ERROR)
	{
	    //* Set the Mode Register
    	AT91C_BASE_MCI->MCI_MR = AT91C_MCI_MR_PDCMODE;

		for(i = 0; i < Nb_Cards_Found; i++)
		{
			if (AT91F_MCI_GetCSD(pMCI_Device,
									  pMCI_Device->pMCI_DeviceFeatures[i].Relative_Card_Address,
									  tab_response) != AT91C_CMD_SEND_OK)
				pMCI_Device->pMCI_DeviceFeatures[i].Relative_Card_Address = 0;					  
			else
			{
				pMCI_Device->pMCI_DeviceFeatures[i].Max_Read_DataBlock_Length = 1 << ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) & AT91C_CSD_RD_B_LEN_M );
	 			pMCI_Device->pMCI_DeviceFeatures[i].Max_Write_DataBlock_Length =	1 << ((tab_response[3] >> AT91C_CSD_WBLEN_S) & AT91C_CSD_WBLEN_M );
				pMCI_Device->pMCI_DeviceFeatures[i].Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v22_SECT_SIZE_S) & AT91C_CSD_v22_SECT_SIZE_M );
		  		pMCI_Device->pMCI_DeviceFeatures[i].Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) & AT91C_CSD_RD_B_PAR_M;
				pMCI_Device->pMCI_DeviceFeatures[i].Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) & AT91C_CSD_WBLOCK_P_M;
				
				// None in MMC specification version 2.2
				pMCI_Device->pMCI_DeviceFeatures[i].Erase_Block_Enable = 0;
				
				pMCI_Device->pMCI_DeviceFeatures[i].Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) & AT91C_CSD_RD_B_MIS_M;
				pMCI_Device->pMCI_DeviceFeatures[i].Write_Block_Misalignment = (tab_response[1] >> AT91C_CSD_WR_B_MIS_S) & AT91C_CSD_WR_B_MIS_M;

				//// Compute Memory Capacity
				// compute MULT
				mult = 1 << ( ((tab_response[2] >> AT91C_CSD_C_SIZE_M_S) & AT91C_CSD_C_SIZE_M_M) + 2 );
				// compute MSB of C_SIZE
				blocknr = ((tab_response[1] >> AT91C_CSD_CSIZE_H_S) & AT91C_CSD_CSIZE_H_M) << 2;
				// compute MULT * (LSB of C-SIZE + MSB already computed + 1) = BLOCKNR
				blocknr = mult * ( ( blocknr + ( (tab_response[2] >> AT91C_CSD_CSIZE_L_S) & AT91C_CSD_CSIZE_L_M) ) + 1 );

				pMCI_Device->pMCI_DeviceFeatures[i].Memory_Capacity =  pMCI_Device->pMCI_DeviceFeatures[i].Max_Read_DataBlock_Length * blocknr;
		  		//// End of Compute Memory Capacity
		  		
			}	// end of else			  
		}	// end of for
		
		return AT91C_INIT_OK;
	}	// end of if

    return AT91C_INIT_ERROR;
}
#endif

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SDCard_GetOCR
//* \brief Asks to all cards to send their operations conditions
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_GetOCR (AT91PS_MciDevice pMCI_Device)
{
	unsigned int	response =0x0;

	// The RCA to be used for CMD55 in Idle state shall be the card's default RCA=0x0000.
	pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address = 0x0;
 	
 	while( (response & AT91C_CARD_POWER_UP_BUSY) != AT91C_CARD_POWER_UP_BUSY )
    {
    	response = AT91F_MCI_SDCard_SendAppCommand(pMCI_Device,
  										AT91C_SDCARD_APP_OP_COND_CMD,
  										AT91C_MMC_HOST_VOLTAGE_RANGE);
		if (response != AT91C_CMD_SEND_OK)
			return AT91C_INIT_ERROR;
		
		response = AT91C_BASE_MCI->MCI_RSPR[0];
	}
	
	return(AT91C_BASE_MCI->MCI_RSPR[0]);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SDCard_GetCID
//* \brief Asks to the SDCard on the chosen slot to send its CID
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_GetCID (AT91PS_MciDevice pMCI_Device, unsigned int *response)
{
 	if(AT91F_MCI_SendCommand(pMCI_Device,
							AT91C_ALL_SEND_CID_CMD,
							AT91C_NO_ARGUMENT) != AT91C_CMD_SEND_OK)
		return AT91C_CMD_SEND_ERROR;
	
    response[0] = AT91C_BASE_MCI->MCI_RSPR[0];
   	response[1] = AT91C_BASE_MCI->MCI_RSPR[1];
    response[2] = AT91C_BASE_MCI->MCI_RSPR[2];
    response[3] = AT91C_BASE_MCI->MCI_RSPR[3];
    
    return AT91C_CMD_SEND_OK;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SDCard_SetBusWidth
//* \brief  Set bus width for SDCard
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_SetBusWidth(AT91PS_MciDevice pMCI_Device)
{
	volatile int	ret_value;
	char			bus_width;

	do
	{
		ret_value =AT91F_MCI_GetStatus(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address);
	}
	while((ret_value > 0) && ((ret_value & AT91C_SR_READY_FOR_DATA) == 0));

	// Select Card
    AT91F_MCI_SendCommand(pMCI_Device,
    						AT91C_SEL_DESEL_CARD_CMD,
    						(pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address)<<16);

	// Set bus width for Sdcard
	if(pMCI_Device->pMCI_DeviceDesc->SDCard_bus_width == AT91C_MCI_SCDBUS)
		 	bus_width = AT91C_BUS_WIDTH_4BITS;
	else	bus_width = AT91C_BUS_WIDTH_1BIT;

	if (AT91F_MCI_SDCard_SendAppCommand(pMCI_Device,AT91C_SDCARD_SET_BUS_WIDTH_CMD,bus_width) != AT91C_CMD_SEND_OK)
		return AT91C_CMD_SEND_ERROR;

	return AT91C_CMD_SEND_OK;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_SDCard_Init
//* \brief Return the SDCard initialisation status
//*----------------------------------------------------------------------------
int AT91F_MCI_SDCard_Init (AT91PS_MciDevice pMCI_Device)
{
    unsigned int	tab_response[4];
	unsigned int	mult,blocknr;

	AT91F_MCI_SendCommand(pMCI_Device, AT91C_GO_IDLE_STATE_CMD, AT91C_NO_ARGUMENT);

    if(AT91F_MCI_SDCard_GetOCR(pMCI_Device) == AT91C_INIT_ERROR)
    	return AT91C_INIT_ERROR;

	if (AT91F_MCI_SDCard_GetCID(pMCI_Device,tab_response) == AT91C_CMD_SEND_OK)
	{
	    pMCI_Device->pMCI_DeviceFeatures->Card_Inserted = AT91C_SD_CARD_INSERTED;

	    if (AT91F_MCI_SendCommand(pMCI_Device, AT91C_SET_RELATIVE_ADDR_CMD, 0) == AT91C_CMD_SEND_OK)
		{
			pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address = (AT91C_BASE_MCI->MCI_RSPR[0] >> 16);
			if (AT91F_MCI_GetCSD(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Relative_Card_Address,tab_response) == AT91C_CMD_SEND_OK)
			{
		  		pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length = 1 << ((tab_response[1] >> AT91C_CSD_RD_B_LEN_S) & AT91C_CSD_RD_B_LEN_M );
	 			pMCI_Device->pMCI_DeviceFeatures->Max_Write_DataBlock_Length =	1 << ((tab_response[3] >> AT91C_CSD_WBLEN_S) & AT91C_CSD_WBLEN_M );
				pMCI_Device->pMCI_DeviceFeatures->Sector_Size = 1 + ((tab_response[2] >> AT91C_CSD_v21_SECT_SIZE_S) & AT91C_CSD_v21_SECT_SIZE_M );
		  		pMCI_Device->pMCI_DeviceFeatures->Read_Partial = (tab_response[1] >> AT91C_CSD_RD_B_PAR_S) & AT91C_CSD_RD_B_PAR_M;
				pMCI_Device->pMCI_DeviceFeatures->Write_Partial = (tab_response[3] >> AT91C_CSD_WBLOCK_P_S) & AT91C_CSD_WBLOCK_P_M;
				pMCI_Device->pMCI_DeviceFeatures->Erase_Block_Enable = (tab_response[3] >> AT91C_CSD_v21_ER_BLEN_EN_S) & AT91C_CSD_v21_ER_BLEN_EN_M;
				pMCI_Device->pMCI_DeviceFeatures->Read_Block_Misalignment = (tab_response[1] >> AT91C_CSD_RD_B_MIS_S) & AT91C_CSD_RD_B_MIS_M;
				pMCI_Device->pMCI_DeviceFeatures->Write_Block_Misalignment = (tab_response[1] >> AT91C_CSD_WR_B_MIS_S) & AT91C_CSD_WR_B_MIS_M;

				//// Compute Memory Capacity
					// compute MULT
					mult = 1 << ( ((tab_response[2] >> AT91C_CSD_C_SIZE_M_S) & AT91C_CSD_C_SIZE_M_M) + 2 );
					// compute MSB of C_SIZE
					blocknr = ((tab_response[1] >> AT91C_CSD_CSIZE_H_S) & AT91C_CSD_CSIZE_H_M) << 2;
					// compute MULT * (LSB of C-SIZE + MSB already computed + 1) = BLOCKNR
					blocknr = mult * ( ( blocknr + ( (tab_response[2] >> AT91C_CSD_CSIZE_L_S) & AT91C_CSD_CSIZE_L_M) ) + 1 );

					pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity =  pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length * blocknr;
			  	//// End of Compute Memory Capacity
					printf("SD-Card: %d Bytes\n\r", pMCI_Device->pMCI_DeviceFeatures->Memory_Capacity);

		  		if( AT91F_MCI_SDCard_SetBusWidth(pMCI_Device) == AT91C_CMD_SEND_OK )
				{	
					 if (AT91F_MCI_SetBlocklength(pMCI_Device,pMCI_Device->pMCI_DeviceFeatures->Max_Read_DataBlock_Length) == AT91C_CMD_SEND_OK)
					return AT91C_INIT_OK;
				}
			}
		}
	}
    return AT91C_INIT_ERROR;
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_CfgDevice
//* \brief This function is used to initialise MMC or SDCard Features
//*----------------------------------------------------------------------------
void AT91F_CfgDevice(void)
{
	// Init Device Structure

	MCI_Device_Features.Relative_Card_Address 		= 0;
	MCI_Device_Features.Card_Inserted 				= AT91C_CARD_REMOVED;
	MCI_Device_Features.Max_Read_DataBlock_Length	= 0;
	MCI_Device_Features.Max_Write_DataBlock_Length 	= 0;
	MCI_Device_Features.Read_Partial 				= 0;
	MCI_Device_Features.Write_Partial 				= 0;
	MCI_Device_Features.Erase_Block_Enable 			= 0;
	MCI_Device_Features.Sector_Size 				= 0;
	MCI_Device_Features.Memory_Capacity 			= 0;
	
	MCI_Device_Desc.state							= AT91C_MCI_IDLE;
	MCI_Device_Desc.SDCard_bus_width				= AT91C_MCI_SCDBUS;
	
	// Init AT91S_DataFlash Global Structure, by default AT45DB choosen !!!
	MCI_Device.pMCI_DeviceDesc 		= &MCI_Device_Desc;
	MCI_Device.pMCI_DeviceFeatures 	= &MCI_Device_Features;

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCI_Init
//* \brief Initialsise Card
//*----------------------------------------------------------------------------
int AT91F_MCI_Init(void)
{

///////////////////////////////////////////////////////////////////////////////////////////
//  MCI Init : common to MMC and SDCard
///////////////////////////////////////////////////////////////////////////////////////////

    // Set up PIO SDC_TYPE to switch on MMC/SDCard and not DataFlash Card
	AT91F_PIO_CfgOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
	AT91F_PIO_SetOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
	
	// Init MCI for MMC and SDCard interface
	AT91F_MCI_CfgPIO();	
	AT91F_MCI_CfgPMC();
	AT91F_PDC_Open(AT91C_BASE_PDC_MCI);

    // Disable all the interrupts
    AT91C_BASE_MCI->MCI_IDR = 0xFFFFFFFF;

	// Init MCI Device Structures
	AT91F_CfgDevice();

	// Configure MCI interrupt 
	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC,
						 AT91C_ID_MCI,
						 AT91C_AIC_PRIOR_HIGHEST,
						 AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE,
						 AT91F_ASM_MCI_Handler);

	// Enable MCI interrupt
	AT91F_AIC_EnableIt(AT91C_BASE_AIC,AT91C_ID_MCI);

	// Enable Receiver
	AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_DBGU);

	AT91F_MCI_Configure(AT91C_BASE_MCI,
						AT91C_MCI_DTOR_1MEGA_CYCLES,
						AT91C_MCI_MR_PDCMODE,			// 15MHz for MCK = 60MHz (CLKDIV = 1)
						AT91C_MCI_SDCARD_4BITS_SLOTA);
	
	if(AT91F_MCI_SDCard_Init(&MCI_Device) != AT91C_INIT_OK)
		return FALSE;
	else
		return TRUE;

}

//*----------------------------------------------------------------------------
//* \fn    AT91F_MCIDeviceWaitReady
//* \brief Wait for MCI Device ready
//*----------------------------------------------------------------------------
void AT91F_MCIDeviceWaitReady(unsigned int timeout)
{
	volatile int status;
	
	do
	{
		status = AT91C_BASE_MCI->MCI_SR;
		timeout--;
	}
	while( !(status & AT91C_MCI_NOTBUSY)  && (timeout>0) );	
}

unsigned int swab32(unsigned int data)
{
	unsigned int res = 0;

	res = (data & 0x000000ff) << 24 |
				(data & 0x0000ff00) << 8  |
				(data & 0x00ff0000) >> 8  |
				(data & 0xff000000) >> 24;

	return res;
}

//*--------------------------------------------------------------------
//* \fn    AT91F_MCI_ReadBlockSwab
//* \brief Read Block and swap byte order
//*--------------------------------------------------------------------
int AT91F_MCI_ReadBlockSwab(
	AT91PS_MciDevice pMCI_Device,
	int src,
	unsigned int *databuffer,
	int sizeToRead)
{
	int i;
	unsigned char *buf = (unsigned char *)databuffer;

	//* Read Block 1
	for(i=0;i<BUFFER_SIZE_MCI_DEVICE;i++)
		*buf++ = 0x00;	
	AT91F_MCI_ReadBlock(&MCI_Device,src,databuffer,sizeToRead);

	//* Wait end of Read
	AT91F_MCIDeviceWaitReady(AT91C_MCI_TIMEOUT);

	{
		int index;
		unsigned int *uiBuffer = databuffer;

		for(index = 0; index < 512/4; index++)
			uiBuffer[index] = swab32(uiBuffer[index]);
	}
	return(1);
}