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1/* Driver for ATMEL DataFlash support
2 * Author : Hamid Ikdoumi (Atmel)
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation; either version 2 of
7 * the License, or (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
17 * MA 02111-1307 USA
18 *
19 */
20
21#include <config.h>
22#include <common.h>
23#include <asm/hardware.h>
24
25#ifdef CONFIG_HAS_DATAFLASH
26#include <dataflash.h>
27
28#define SPI_CLK 5000000
29#define AT91C_SPI_PCS0_SERIAL_DATAFLASH 0xE /* Chip Select 0 : NPCS0 %1110 */
30#define AT91C_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3 : NPCS3 %0111 */
31
32void AT91F_SpiInit(void) {
33
34/*-------------------------------------------------------------------*/
35/* SPI DataFlash Init */
36/*-------------------------------------------------------------------*/
37 /* Configure PIOs */
38 AT91C_BASE_PIOA->PIO_ASR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
39 AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
40 AT91C_BASE_PIOA->PIO_PDR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
41 AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
42 /* Enable CLock */
43 AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
44
45 /* Reset the SPI */
46 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
47
8bde7f77 48 /* Configure SPI in Master Mode with No CS selected !!! */
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49 AT91C_BASE_SPI->SPI_MR = AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS;
50
51 /* Configure CS0 and CS3 */
52 *(AT91C_SPI_CSR + 0) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);
53
54 *(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((AT91C_MASTER_CLOCK / (2*SPI_CLK)) << 8);
55
56}
57
58void AT91F_SpiEnable(int cs) {
59 switch(cs) {
60 case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
61 AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
62 AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS0_SERIAL_DATAFLASH<<16) & AT91C_SPI_PCS);
63 break;
64 case 3: /* Configure SPI CS3 for Serial DataFlash Card */
65 /* Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard */
66 AT91C_BASE_PIOB->PIO_PER = AT91C_PIO_PB7; /* Set in PIO mode */
67 AT91C_BASE_PIOB->PIO_OER = AT91C_PIO_PB7; /* Configure in output */
68 /* Clear Output */
69 AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
70 /* Configure PCS */
71 AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
72 AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
73 break;
74 }
75
76 /* SPI_Enable */
77 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
78}
79
80/*----------------------------------------------------------------------------*/
81/* \fn AT91F_SpiWrite */
82/* \brief Set the PDC registers for a transfert */
83/*----------------------------------------------------------------------------*/
84unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
85{
8bde7f77 86 unsigned int timeout;
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87
88 pDesc->state = BUSY;
89
8bde7f77 90 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
2abbe075 91
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92 /* Initialize the Transmit and Receive Pointer */
93 AT91C_BASE_SPI->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt ;
94 AT91C_BASE_SPI->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt ;
2abbe075 95
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96 /* Intialize the Transmit and Receive Counters */
97 AT91C_BASE_SPI->SPI_RCR = pDesc->rx_cmd_size;
98 AT91C_BASE_SPI->SPI_TCR = pDesc->tx_cmd_size;
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99
100 if ( pDesc->tx_data_size != 0 ) {
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101 /* Initialize the Next Transmit and Next Receive Pointer */
102 AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
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103 AT91C_BASE_SPI->SPI_TNPR = (unsigned int)pDesc->tx_data_pt ;
104
105 /* Intialize the Next Transmit and Next Receive Counters */
106 AT91C_BASE_SPI->SPI_RNCR = pDesc->rx_data_size ;
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107 AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
108 }
2abbe075 109
8bde7f77 110 /* arm simple, non interrupt dependent timer */
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111 reset_timer_masked();
112 timeout = 0;
113
114 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
115 while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF) && ((timeout = get_timer_masked() ) < CFG_SPI_WRITE_TOUT));
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116 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
117 pDesc->state = IDLE;
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118
119 if (timeout >= CFG_SPI_WRITE_TOUT){
120 printf("Error Timeout\n\r");
121 return DATAFLASH_ERROR;
122 }
123
124 return DATAFLASH_OK;
125}
126
127
128/*----------------------------------------------------------------------*/
129/* \fn AT91F_DataFlashSendCommand */
130/* \brief Generic function to send a command to the dataflash */
131/*----------------------------------------------------------------------*/
132AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
133 AT91PS_DataFlash pDataFlash,
134 unsigned char OpCode,
135 unsigned int CmdSize,
136 unsigned int DataflashAddress)
137{
138 unsigned int adr;
139
140 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
141 return DATAFLASH_BUSY;
142
143 /* process the address to obtain page address and byte address */
144 adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) << pDataFlash->pDevice->page_offset) + (DataflashAddress % (pDataFlash->pDevice->pages_size));
145
146 /* fill the command buffer */
147 pDataFlash->pDataFlashDesc->command[0] = OpCode;
148 pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x00FF0000) >> 16);
149 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x0000FF00) >> 8);
150 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(adr & 0x000000FF) ;
151 pDataFlash->pDataFlashDesc->command[4] = 0;
152 pDataFlash->pDataFlashDesc->command[5] = 0;
153 pDataFlash->pDataFlashDesc->command[6] = 0;
154 pDataFlash->pDataFlashDesc->command[7] = 0;
155
156 /* Initialize the SpiData structure for the spi write fuction */
157 pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
158 pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize ;
159 pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
160 pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize ;
161
162 /* send the command and read the data */
163 return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
164}
165
166
167/*----------------------------------------------------------------------*/
168/* \fn AT91F_DataFlashGetStatus */
169/* \brief Read the status register of the dataflash */
170/*----------------------------------------------------------------------*/
171AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
172{
173 AT91S_DataFlashStatus status;
174
175 /* if a transfert is in progress ==> return 0 */
176 if( (pDesc->state) != IDLE)
177 return DATAFLASH_BUSY;
178
179 /* first send the read status command (D7H) */
180 pDesc->command[0] = DB_STATUS;
181 pDesc->command[1] = 0;
182
183 pDesc->DataFlash_state = GET_STATUS;
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184 pDesc->tx_data_size = 0 ; /* Transmit the command and receive response */
185 pDesc->tx_cmd_pt = pDesc->command ;
186 pDesc->rx_cmd_pt = pDesc->command ;
187 pDesc->rx_cmd_size = 2 ;
188 pDesc->tx_cmd_size = 2 ;
189 status = AT91F_SpiWrite (pDesc);
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190
191 pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
192
193 return status;
194}
195
196
197/*----------------------------------------------------------------------*/
198/* \fn AT91F_DataFlashWaitReady */
199/* \brief wait for dataflash ready (bit7 of the status register == 1) */
200/*----------------------------------------------------------------------*/
201AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
202{
203 pDataFlashDesc->DataFlash_state = IDLE;
204
205 do {
206 AT91F_DataFlashGetStatus(pDataFlashDesc);
207 timeout--;
208 }
209 while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0) );
210
211 if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
212 return DATAFLASH_ERROR;
213
214 return DATAFLASH_OK;
215}
216
217
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218/*------------------------------------------------------------------------------*/
219/* Function Name : AT91F_DataFlashContinuousRead */
220/* Object : Continuous stream Read */
221/* Input Parameters : DataFlash Service */
222/* : <src> = dataflash address */
223/* : <*dataBuffer> = data buffer pointer */
224/* : <sizeToRead> = data buffer size */
225/* Return value : State of the dataflash */
226/*------------------------------------------------------------------------------*/
227AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
8bde7f77 228 AT91PS_DataFlash pDataFlash,
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229 int src,
230 unsigned char *dataBuffer,
231 int sizeToRead )
232{
233 /* Test the size to read in the device */
234 if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
235 return DATAFLASH_MEMORY_OVERFLOW;
236
237 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
238 pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
239 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
240 pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
241
242 /* Send the command to the dataflash */
243 return(AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
244}
245
246
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247/*------------------------------------------------------------------------------*/
248/* Function Name : AT91F_DataFlashPagePgmBuf */
249/* Object : Main memory page program through buffer 1 or buffer 2 */
250/* Input Parameters : DataFlash Service */
251/* : <*src> = Source buffer */
252/* : <dest> = dataflash destination address */
253/* : <SizeToWrite> = data buffer size */
254/* Return value : State of the dataflash */
255/*------------------------------------------------------------------------------*/
256AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
257 AT91PS_DataFlash pDataFlash,
258 unsigned char *src,
259 unsigned int dest,
260 unsigned int SizeToWrite)
261{
262 pDataFlash->pDataFlashDesc->tx_data_pt = src ;
263 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
264 pDataFlash->pDataFlashDesc->rx_data_pt = src;
265 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
266
267 /* Send the command to the dataflash */
268 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, 4, dest));
269}
270
271
272/*------------------------------------------------------------------------------*/
273/* Function Name : AT91F_MainMemoryToBufferTransfert */
274/* Object : Read a page in the SRAM Buffer 1 or 2 */
275/* Input Parameters : DataFlash Service */
276/* : Page concerned */
277/* : */
278/* Return value : State of the dataflash */
279/*------------------------------------------------------------------------------*/
280AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
281 AT91PS_DataFlash pDataFlash,
282 unsigned char BufferCommand,
283 unsigned int page)
284{
285 /* Test if the buffer command is legal */
286 if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
287 return DATAFLASH_BAD_COMMAND;
288
289 /* no data to transmit or receive */
8bde7f77 290 pDataFlash->pDataFlashDesc->tx_data_size = 0;
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291
292 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, page*pDataFlash->pDevice->pages_size));
293}
294
295
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296/*----------------------------------------------------------------------------- */
297/* Function Name : AT91F_DataFlashWriteBuffer */
298/* Object : Write data to the internal sram buffer 1 or 2 */
299/* Input Parameters : DataFlash Service */
300/* : <BufferCommand> = command to write buffer1 or buffer2 */
301/* : <*dataBuffer> = data buffer to write */
302/* : <bufferAddress> = address in the internal buffer */
303/* : <SizeToWrite> = data buffer size */
304/* Return value : State of the dataflash */
305/*------------------------------------------------------------------------------*/
306AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
307 AT91PS_DataFlash pDataFlash,
308 unsigned char BufferCommand,
309 unsigned char *dataBuffer,
310 unsigned int bufferAddress,
311 int SizeToWrite )
312{
313 /* Test if the buffer command is legal */
314 if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
315 return DATAFLASH_BAD_COMMAND;
316
317 /* buffer address must be lower than page size */
318 if (bufferAddress > pDataFlash->pDevice->pages_size)
319 return DATAFLASH_BAD_ADDRESS;
320
321 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
322 return DATAFLASH_BUSY;
323
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324 /* Send first Write Command */
325 pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
2abbe075 326 pDataFlash->pDataFlashDesc->command[1] = 0;
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327 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
328 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
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329
330
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331 pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
332 pDataFlash->pDataFlashDesc->tx_cmd_size = 4 ;
333 pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
334 pDataFlash->pDataFlashDesc->rx_cmd_size = 4 ;
2abbe075 335
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336 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
337 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
338 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
339 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
2abbe075 340
8bde7f77 341 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
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342}
343
344
345/*------------------------------------------------------------------------------*/
346/* Function Name : AT91F_WriteBufferToMain */
347/* Object : Write buffer to the main memory */
348/* Input Parameters : DataFlash Service */
349/* : <BufferCommand> = command to send to buffer1 or buffer2 */
350/* : <dest> = main memory address */
351/* Return value : State of the dataflash */
352/*------------------------------------------------------------------------------*/
353AT91S_DataFlashStatus AT91F_WriteBufferToMain (
354 AT91PS_DataFlash pDataFlash,
355 unsigned char BufferCommand,
356 unsigned int dest )
357{
358 /* Test if the buffer command is correct */
359 if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
360 (BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
361 (BufferCommand != DB_BUF2_PAGE_PGM) &&
362 (BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
363 return DATAFLASH_BAD_COMMAND;
364
365 /* no data to transmit or receive */
366 pDataFlash->pDataFlashDesc->tx_data_size = 0;
367
368 /* Send the command to the dataflash */
369 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, dest));
370}
371
372
373/*------------------------------------------------------------------------------*/
374/* Function Name : AT91F_PartialPageWrite */
375/* Object : Erase partielly a page */
376/* Input Parameters : <page> = page number */
377/* : <AdrInpage> = adr to begin the fading */
378/* : <length> = Number of bytes to erase */
379/*------------------------------------------------------------------------------*/
380AT91S_DataFlashStatus AT91F_PartialPageWrite (
381 AT91PS_DataFlash pDataFlash,
382 unsigned char *src,
383 unsigned int dest,
384 unsigned int size)
385{
386 unsigned int page;
387 unsigned int AdrInPage;
388
389 page = dest / (pDataFlash->pDevice->pages_size);
390 AdrInPage = dest % (pDataFlash->pDevice->pages_size);
391
392 /* Read the contents of the page in the Sram Buffer */
393 AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
394 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
395 /*Update the SRAM buffer */
396 AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
397 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
398
399 /* Rewrite the modified Sram Buffer in the main memory */
400 return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM, (page*pDataFlash->pDevice->pages_size)));
401}
402
403
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404/*------------------------------------------------------------------------------*/
405/* Function Name : AT91F_DataFlashWrite_Overloaded */
406/* Object : */
407/* Input Parameters : <*src> = Source buffer */
408/* : <dest> = dataflash adress */
409/* : <size> = data buffer size */
410/*------------------------------------------------------------------------------*/
411AT91S_DataFlashStatus AT91F_DataFlashWrite(
412 AT91PS_DataFlash pDataFlash,
413 unsigned char *src,
414 int dest,
415 int size )
416{
417 unsigned int length;
418
419 AT91F_SpiEnable(pDataFlash->pDevice->cs);
420
8bde7f77 421 if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
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422 return DATAFLASH_MEMORY_OVERFLOW;
423
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424 /* If destination does not fit a page start address */
425 if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
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426 length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
427
428 if (size < length)
429 length = size;
430
431 if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
432 return DATAFLASH_ERROR;
433
434 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
435
436 /* Update size, source and destination pointers */
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437 size -= length;
438 dest += length;
439 src += length;
440 }
2abbe075 441
8bde7f77 442 while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
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443 /* program dataflash page */
444 if(!AT91F_DataFlashPagePgmBuf(pDataFlash, src, dest, pDataFlash->pDevice->pages_size ))
445 return DATAFLASH_ERROR;
446
447 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
448
449 /* Update size, source and destination pointers */
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450 size -= pDataFlash->pDevice->pages_size ;
451 dest += pDataFlash->pDevice->pages_size ;
452 src += pDataFlash->pDevice->pages_size ;
453 }
2abbe075 454
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455 /* If still some bytes to read */
456 if ( size > 0 ) {
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457 /* program dataflash page */
458 if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
459 return DATAFLASH_ERROR;
460
461 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
462 }
8bde7f77 463 return DATAFLASH_OK;
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464}
465
466
467/*------------------------------------------------------------------------------*/
468/* Function Name : AT91F_DataFlashRead */
469/* Object : Read a block in dataflash */
470/* Input Parameters : */
471/* Return value : */
472/*------------------------------------------------------------------------------*/
473int AT91F_DataFlashRead(
474 AT91PS_DataFlash pDataFlash,
475 unsigned long addr,
476 unsigned long size,
477 char *buffer)
478{
479 unsigned long SizeToRead;
480
481 AT91F_SpiEnable(pDataFlash->pDevice->cs);
482
483 if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
484 return -1;
485
486 while (size) {
487 SizeToRead = (size < 0x8000)? size:0x8000;
488
489 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
490 return -1;
491
492 if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
493 return -1;
494
495 size -= SizeToRead;
496 addr += SizeToRead;
497 buffer += SizeToRead;
498 }
499
8bde7f77 500 return DATAFLASH_OK;
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501}
502
503
504/*------------------------------------------------------------------------------*/
505/* Function Name : AT91F_DataflashProbe */
506/* Object : */
507/* Input Parameters : */
508/* Return value : Dataflash status register */
509/*------------------------------------------------------------------------------*/
510int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
511{
512 AT91F_SpiEnable(cs);
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513 AT91F_DataFlashGetStatus(pDesc);
514 return((pDesc->command[1] == 0xFF)? 0: pDesc->command[1] & 0x3C);
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515}
516
517#endif