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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / 2abbe0754759f94c79125a2534fbc4be74f416bc / . / cpu / at91rm9200 / at45.c
blob: e0057e79af1eb04207048bb75520577231ab35a9 [file] [log] [blame]
wdenk2abbe072003-06-16 23:50:08 +0000[diff] [blame^]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
48 /* Configure SPI in Master Mode with No CS selected !!! */
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{
86 unsigned int timeout;
87
88 pDesc->state = BUSY;
89
90 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
91
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 ;
95
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;
99
100 if ( pDesc->tx_data_size != 0 ) {
101 /* Initialize the Next Transmit and Next Receive Pointer */
102 AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
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 ;
107 AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
108 }
109
110 /* arm simple, non interrupt dependent timer */
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));
116 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
117 pDesc->state = IDLE;
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;
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);
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
218
219/*------------------------------------------------------------------------------*/
220/* Function Name : AT91F_DataFlashContinuousRead */
221/* Object : Continuous stream Read */
222/* Input Parameters : DataFlash Service */
223/* : <src> = dataflash address */
224/* : <*dataBuffer> = data buffer pointer */
225/* : <sizeToRead> = data buffer size */
226/* Return value : State of the dataflash */
227/*------------------------------------------------------------------------------*/
228AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
229 AT91PS_DataFlash pDataFlash,
230 int src,
231 unsigned char *dataBuffer,
232 int sizeToRead )
233{
234 /* Test the size to read in the device */
235 if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
236 return DATAFLASH_MEMORY_OVERFLOW;
237
238 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
239 pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
240 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
241 pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
242
243 /* Send the command to the dataflash */
244 return(AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src));
245}
246
247
248
249/*------------------------------------------------------------------------------*/
250/* Function Name : AT91F_DataFlashPagePgmBuf */
251/* Object : Main memory page program through buffer 1 or buffer 2 */
252/* Input Parameters : DataFlash Service */
253/* : <*src> = Source buffer */
254/* : <dest> = dataflash destination address */
255/* : <SizeToWrite> = data buffer size */
256/* Return value : State of the dataflash */
257/*------------------------------------------------------------------------------*/
258AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
259 AT91PS_DataFlash pDataFlash,
260 unsigned char *src,
261 unsigned int dest,
262 unsigned int SizeToWrite)
263{
264 pDataFlash->pDataFlashDesc->tx_data_pt = src ;
265 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
266 pDataFlash->pDataFlashDesc->rx_data_pt = src;
267 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
268
269 /* Send the command to the dataflash */
270 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, 4, dest));
271}
272
273
274/*------------------------------------------------------------------------------*/
275/* Function Name : AT91F_MainMemoryToBufferTransfert */
276/* Object : Read a page in the SRAM Buffer 1 or 2 */
277/* Input Parameters : DataFlash Service */
278/* : Page concerned */
279/* : */
280/* Return value : State of the dataflash */
281/*------------------------------------------------------------------------------*/
282AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
283 AT91PS_DataFlash pDataFlash,
284 unsigned char BufferCommand,
285 unsigned int page)
286{
287 /* Test if the buffer command is legal */
288 if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
289 return DATAFLASH_BAD_COMMAND;
290
291 /* no data to transmit or receive */
292 pDataFlash->pDataFlashDesc->tx_data_size = 0;
293
294 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, page*pDataFlash->pDevice->pages_size));
295}
296
297
298
299/*----------------------------------------------------------------------------- */
300/* Function Name : AT91F_DataFlashWriteBuffer */
301/* Object : Write data to the internal sram buffer 1 or 2 */
302/* Input Parameters : DataFlash Service */
303/* : <BufferCommand> = command to write buffer1 or buffer2 */
304/* : <*dataBuffer> = data buffer to write */
305/* : <bufferAddress> = address in the internal buffer */
306/* : <SizeToWrite> = data buffer size */
307/* Return value : State of the dataflash */
308/*------------------------------------------------------------------------------*/
309AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
310 AT91PS_DataFlash pDataFlash,
311 unsigned char BufferCommand,
312 unsigned char *dataBuffer,
313 unsigned int bufferAddress,
314 int SizeToWrite )
315{
316 /* Test if the buffer command is legal */
317 if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
318 return DATAFLASH_BAD_COMMAND;
319
320 /* buffer address must be lower than page size */
321 if (bufferAddress > pDataFlash->pDevice->pages_size)
322 return DATAFLASH_BAD_ADDRESS;
323
324 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
325 return DATAFLASH_BUSY;
326
327 /* Send first Write Command */
328 pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
329 pDataFlash->pDataFlashDesc->command[1] = 0;
330 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
331 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
332
333
334 pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
335 pDataFlash->pDataFlashDesc->tx_cmd_size = 4 ;
336 pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
337 pDataFlash->pDataFlashDesc->rx_cmd_size = 4 ;
338
339 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
340 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
341 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
342 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
343
344 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
345}
346
347
348/*------------------------------------------------------------------------------*/
349/* Function Name : AT91F_WriteBufferToMain */
350/* Object : Write buffer to the main memory */
351/* Input Parameters : DataFlash Service */
352/* : <BufferCommand> = command to send to buffer1 or buffer2 */
353/* : <dest> = main memory address */
354/* Return value : State of the dataflash */
355/*------------------------------------------------------------------------------*/
356AT91S_DataFlashStatus AT91F_WriteBufferToMain (
357 AT91PS_DataFlash pDataFlash,
358 unsigned char BufferCommand,
359 unsigned int dest )
360{
361 /* Test if the buffer command is correct */
362 if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
363 (BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
364 (BufferCommand != DB_BUF2_PAGE_PGM) &&
365 (BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
366 return DATAFLASH_BAD_COMMAND;
367
368 /* no data to transmit or receive */
369 pDataFlash->pDataFlashDesc->tx_data_size = 0;
370
371 /* Send the command to the dataflash */
372 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, 4, dest));
373}
374
375
376/*------------------------------------------------------------------------------*/
377/* Function Name : AT91F_PartialPageWrite */
378/* Object : Erase partielly a page */
379/* Input Parameters : <page> = page number */
380/* : <AdrInpage> = adr to begin the fading */
381/* : <length> = Number of bytes to erase */
382/*------------------------------------------------------------------------------*/
383AT91S_DataFlashStatus AT91F_PartialPageWrite (
384 AT91PS_DataFlash pDataFlash,
385 unsigned char *src,
386 unsigned int dest,
387 unsigned int size)
388{
389 unsigned int page;
390 unsigned int AdrInPage;
391
392 page = dest / (pDataFlash->pDevice->pages_size);
393 AdrInPage = dest % (pDataFlash->pDevice->pages_size);
394
395 /* Read the contents of the page in the Sram Buffer */
396 AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
397 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
398 /*Update the SRAM buffer */
399 AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
400 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
401
402 /* Rewrite the modified Sram Buffer in the main memory */
403 return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM, (page*pDataFlash->pDevice->pages_size)));
404}
405
406
407
408/*------------------------------------------------------------------------------*/
409/* Function Name : AT91F_DataFlashWrite_Overloaded */
410/* Object : */
411/* Input Parameters : <*src> = Source buffer */
412/* : <dest> = dataflash adress */
413/* : <size> = data buffer size */
414/*------------------------------------------------------------------------------*/
415AT91S_DataFlashStatus AT91F_DataFlashWrite(
416 AT91PS_DataFlash pDataFlash,
417 unsigned char *src,
418 int dest,
419 int size )
420{
421 unsigned int length;
422
423 AT91F_SpiEnable(pDataFlash->pDevice->cs);
424
425 if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
426 return DATAFLASH_MEMORY_OVERFLOW;
427
428 /* If destination does not fit a page start address */
429 if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
430 length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
431
432 if (size < length)
433 length = size;
434
435 if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
436 return DATAFLASH_ERROR;
437
438 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
439
440 /* Update size, source and destination pointers */
441 size -= length;
442 dest += length;
443 src += length;
444 }
445
446 while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
447 /* program dataflash page */
448 if(!AT91F_DataFlashPagePgmBuf(pDataFlash, src, dest, pDataFlash->pDevice->pages_size ))
449 return DATAFLASH_ERROR;
450
451 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
452
453 /* Update size, source and destination pointers */
454 size -= pDataFlash->pDevice->pages_size ;
455 dest += pDataFlash->pDevice->pages_size ;
456 src += pDataFlash->pDevice->pages_size ;
457 }
458
459 /* If still some bytes to read */
460 if ( size > 0 ) {
461 /* program dataflash page */
462 if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
463 return DATAFLASH_ERROR;
464
465 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000);
466 }
467 return DATAFLASH_OK;
468}
469
470
471/*------------------------------------------------------------------------------*/
472/* Function Name : AT91F_DataFlashRead */
473/* Object : Read a block in dataflash */
474/* Input Parameters : */
475/* Return value : */
476/*------------------------------------------------------------------------------*/
477int AT91F_DataFlashRead(
478 AT91PS_DataFlash pDataFlash,
479 unsigned long addr,
480 unsigned long size,
481 char *buffer)
482{
483 unsigned long SizeToRead;
484
485 AT91F_SpiEnable(pDataFlash->pDevice->cs);
486
487 if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
488 return -1;
489
490 while (size) {
491 SizeToRead = (size < 0x8000)? size:0x8000;
492
493 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, 1000) != DATAFLASH_OK)
494 return -1;
495
496 if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
497 return -1;
498
499 size -= SizeToRead;
500 addr += SizeToRead;
501 buffer += SizeToRead;
502 }
503
504 return DATAFLASH_OK;
505}
506
507
508/*------------------------------------------------------------------------------*/
509/* Function Name : AT91F_DataflashProbe */
510/* Object : */
511/* Input Parameters : */
512/* Return value : Dataflash status register */
513/*------------------------------------------------------------------------------*/
514int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
515{
516 AT91F_SpiEnable(cs);
517 AT91F_DataFlashGetStatus(pDesc);
518 return((pDesc->command[1] == 0xFF)? 0: pDesc->command[1] & 0x3C);
519}
520
521#endif