1 /* Driver for ATMEL DataFlash support
2 * Author : Hamid Ikdoumi (Atmel)
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.
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.
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,
23 #include <asm/hardware.h>
25 #ifdef CONFIG_HAS_DATAFLASH
26 #include <dataflash.h>
28 #define AT91C_SPI_CLK 10000000 /* Max Value = 10MHz to be compliant to
29 the Continuous Array Read function */
31 /* AC Characteristics */
32 /* DLYBS = tCSS = 250ns min and DLYBCT = tCSH = 250ns */
33 #define DATAFLASH_TCSS (0xC << 16)
34 #define DATAFLASH_TCHS (0x1 << 24)
36 #define AT91C_TIMEOUT_WRDY 200000
37 #define AT91C_SPI_PCS0_SERIAL_DATAFLASH 0xE /* Chip Select 0 : NPCS0 %1110 */
38 #define AT91C_SPI_PCS3_DATAFLASH_CARD 0x7 /* Chip Select 3 : NPCS3 %0111 */
40 void AT91F_SpiInit(void) {
42 /*-------------------------------------------------------------------*/
43 /* SPI DataFlash Init */
44 /*-------------------------------------------------------------------*/
46 AT91C_BASE_PIOA->PIO_ASR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
47 AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
48 AT91C_BASE_PIOA->PIO_PDR = AT91C_PA3_NPCS0 | AT91C_PA4_NPCS1 | AT91C_PA1_MOSI | AT91C_PA5_NPCS2 |
49 AT91C_PA6_NPCS3 | AT91C_PA0_MISO | AT91C_PA2_SPCK;
51 AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
54 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
56 /* Configure SPI in Master Mode with No CS selected !!! */
57 AT91C_BASE_SPI->SPI_MR = AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS;
59 /* Configure CS0 and CS3 */
60 *(AT91C_SPI_CSR + 0) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & DATAFLASH_TCSS) | (AT91C_SPI_DLYBCT &
61 DATAFLASH_TCHS) | ((AT91C_MASTER_CLOCK / (2*AT91C_SPI_CLK)) << 8);
63 *(AT91C_SPI_CSR + 3) = AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & DATAFLASH_TCSS) | (AT91C_SPI_DLYBCT &
64 DATAFLASH_TCHS) | ((AT91C_MASTER_CLOCK / (2*AT91C_SPI_CLK)) << 8);
68 void AT91F_SpiEnable(int cs) {
70 case 0: /* Configure SPI CS0 for Serial DataFlash AT45DBxx */
71 AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
72 AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS0_SERIAL_DATAFLASH<<16) & AT91C_SPI_PCS);
74 case 3: /* Configure SPI CS3 for Serial DataFlash Card */
75 /* Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard */
76 AT91C_BASE_PIOB->PIO_PER = AT91C_PIO_PB7; /* Set in PIO mode */
77 AT91C_BASE_PIOB->PIO_OER = AT91C_PIO_PB7; /* Configure in output */
79 AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
81 AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
82 AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
87 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
90 /*----------------------------------------------------------------------------*/
91 /* \fn AT91F_SpiWrite */
92 /* \brief Set the PDC registers for a transfert */
93 /*----------------------------------------------------------------------------*/
94 unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
100 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
102 /* Initialize the Transmit and Receive Pointer */
103 AT91C_BASE_SPI->SPI_RPR = (unsigned int)pDesc->rx_cmd_pt ;
104 AT91C_BASE_SPI->SPI_TPR = (unsigned int)pDesc->tx_cmd_pt ;
106 /* Intialize the Transmit and Receive Counters */
107 AT91C_BASE_SPI->SPI_RCR = pDesc->rx_cmd_size;
108 AT91C_BASE_SPI->SPI_TCR = pDesc->tx_cmd_size;
110 if ( pDesc->tx_data_size != 0 ) {
111 /* Initialize the Next Transmit and Next Receive Pointer */
112 AT91C_BASE_SPI->SPI_RNPR = (unsigned int)pDesc->rx_data_pt ;
113 AT91C_BASE_SPI->SPI_TNPR = (unsigned int)pDesc->tx_data_pt ;
115 /* Intialize the Next Transmit and Next Receive Counters */
116 AT91C_BASE_SPI->SPI_RNCR = pDesc->rx_data_size ;
117 AT91C_BASE_SPI->SPI_TNCR = pDesc->tx_data_size ;
120 /* arm simple, non interrupt dependent timer */
121 reset_timer_masked();
124 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTEN + AT91C_PDC_RXTEN;
125 while(!(AT91C_BASE_SPI->SPI_SR & AT91C_SPI_RXBUFF) && ((timeout = get_timer_masked() ) < CFG_SPI_WRITE_TOUT));
126 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
129 if (timeout >= CFG_SPI_WRITE_TOUT){
130 printf("Error Timeout\n\r");
131 return DATAFLASH_ERROR;
138 /*----------------------------------------------------------------------*/
139 /* \fn AT91F_DataFlashSendCommand */
140 /* \brief Generic function to send a command to the dataflash */
141 /*----------------------------------------------------------------------*/
142 AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
143 AT91PS_DataFlash pDataFlash,
144 unsigned char OpCode,
145 unsigned int CmdSize,
146 unsigned int DataflashAddress)
150 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
151 return DATAFLASH_BUSY;
153 /* process the address to obtain page address and byte address */
154 adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) << pDataFlash->pDevice->page_offset) + (DataflashAddress % (pDataFlash->pDevice->pages_size));
156 /* fill the command buffer */
157 pDataFlash->pDataFlashDesc->command[0] = OpCode;
158 if (pDataFlash->pDevice->pages_number >= 16384) {
159 pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x0F000000) >> 24);
160 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x00FF0000) >> 16);
161 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((adr & 0x0000FF00) >> 8);
162 pDataFlash->pDataFlashDesc->command[4] = (unsigned char)(adr & 0x000000FF);
164 pDataFlash->pDataFlashDesc->command[1] = (unsigned char)((adr & 0x00FF0000) >> 16);
165 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)((adr & 0x0000FF00) >> 8);
166 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(adr & 0x000000FF) ;
167 pDataFlash->pDataFlashDesc->command[4] = 0;
169 pDataFlash->pDataFlashDesc->command[5] = 0;
170 pDataFlash->pDataFlashDesc->command[6] = 0;
171 pDataFlash->pDataFlashDesc->command[7] = 0;
173 /* Initialize the SpiData structure for the spi write fuction */
174 pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
175 pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize ;
176 pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
177 pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize ;
179 /* send the command and read the data */
180 return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
184 /*----------------------------------------------------------------------*/
185 /* \fn AT91F_DataFlashGetStatus */
186 /* \brief Read the status register of the dataflash */
187 /*----------------------------------------------------------------------*/
188 AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
190 AT91S_DataFlashStatus status;
192 /* if a transfert is in progress ==> return 0 */
193 if( (pDesc->state) != IDLE)
194 return DATAFLASH_BUSY;
196 /* first send the read status command (D7H) */
197 pDesc->command[0] = DB_STATUS;
198 pDesc->command[1] = 0;
200 pDesc->DataFlash_state = GET_STATUS;
201 pDesc->tx_data_size = 0 ; /* Transmit the command and receive response */
202 pDesc->tx_cmd_pt = pDesc->command ;
203 pDesc->rx_cmd_pt = pDesc->command ;
204 pDesc->rx_cmd_size = 2 ;
205 pDesc->tx_cmd_size = 2 ;
206 status = AT91F_SpiWrite (pDesc);
208 pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
214 /*----------------------------------------------------------------------*/
215 /* \fn AT91F_DataFlashWaitReady */
216 /* \brief wait for dataflash ready (bit7 of the status register == 1) */
217 /*----------------------------------------------------------------------*/
218 AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
220 pDataFlashDesc->DataFlash_state = IDLE;
223 AT91F_DataFlashGetStatus(pDataFlashDesc);
225 } while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0) );
227 if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
228 return DATAFLASH_ERROR;
234 /*------------------------------------------------------------------------------*/
235 /* Function Name : AT91F_DataFlashContinuousRead */
236 /* Object : Continuous stream Read */
237 /* Input Parameters : DataFlash Service */
238 /* : <src> = dataflash address */
239 /* : <*dataBuffer> = data buffer pointer */
240 /* : <sizeToRead> = data buffer size */
241 /* Return value : State of the dataflash */
242 /*------------------------------------------------------------------------------*/
243 AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
244 AT91PS_DataFlash pDataFlash,
246 unsigned char *dataBuffer,
249 AT91S_DataFlashStatus status;
250 /* Test the size to read in the device */
251 if ( (src + sizeToRead) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
252 return DATAFLASH_MEMORY_OVERFLOW;
254 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
255 pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
256 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
257 pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
259 status = AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
260 /* Send the command to the dataflash */
265 /*------------------------------------------------------------------------------*/
266 /* Function Name : AT91F_DataFlashPagePgmBuf */
267 /* Object : Main memory page program through buffer 1 or buffer 2 */
268 /* Input Parameters : DataFlash Service */
269 /* : <*src> = Source buffer */
270 /* : <dest> = dataflash destination address */
271 /* : <SizeToWrite> = data buffer size */
272 /* Return value : State of the dataflash */
273 /*------------------------------------------------------------------------------*/
274 AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
275 AT91PS_DataFlash pDataFlash,
278 unsigned int SizeToWrite)
281 pDataFlash->pDataFlashDesc->tx_data_pt = src ;
282 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
283 pDataFlash->pDataFlashDesc->rx_data_pt = src;
284 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
287 /* Send the command to the dataflash */
288 if (pDataFlash->pDevice->pages_number >= 16384)
290 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, cmdsize, dest));
294 /*------------------------------------------------------------------------------*/
295 /* Function Name : AT91F_MainMemoryToBufferTransfert */
296 /* Object : Read a page in the SRAM Buffer 1 or 2 */
297 /* Input Parameters : DataFlash Service */
298 /* : Page concerned */
300 /* Return value : State of the dataflash */
301 /*------------------------------------------------------------------------------*/
302 AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
303 AT91PS_DataFlash pDataFlash,
304 unsigned char BufferCommand,
308 /* Test if the buffer command is legal */
309 if ((BufferCommand != DB_PAGE_2_BUF1_TRF) && (BufferCommand != DB_PAGE_2_BUF2_TRF))
310 return DATAFLASH_BAD_COMMAND;
312 /* no data to transmit or receive */
313 pDataFlash->pDataFlashDesc->tx_data_size = 0;
315 if (pDataFlash->pDevice->pages_number >= 16384)
317 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize, page*pDataFlash->pDevice->pages_size));
321 /*----------------------------------------------------------------------------- */
322 /* Function Name : AT91F_DataFlashWriteBuffer */
323 /* Object : Write data to the internal sram buffer 1 or 2 */
324 /* Input Parameters : DataFlash Service */
325 /* : <BufferCommand> = command to write buffer1 or buffer2 */
326 /* : <*dataBuffer> = data buffer to write */
327 /* : <bufferAddress> = address in the internal buffer */
328 /* : <SizeToWrite> = data buffer size */
329 /* Return value : State of the dataflash */
330 /*------------------------------------------------------------------------------*/
331 AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
332 AT91PS_DataFlash pDataFlash,
333 unsigned char BufferCommand,
334 unsigned char *dataBuffer,
335 unsigned int bufferAddress,
339 /* Test if the buffer command is legal */
340 if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
341 return DATAFLASH_BAD_COMMAND;
343 /* buffer address must be lower than page size */
344 if (bufferAddress > pDataFlash->pDevice->pages_size)
345 return DATAFLASH_BAD_ADDRESS;
347 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
348 return DATAFLASH_BUSY;
350 /* Send first Write Command */
351 pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
352 pDataFlash->pDataFlashDesc->command[1] = 0;
353 if (pDataFlash->pDevice->pages_number >= 16384) {
354 pDataFlash->pDataFlashDesc->command[2] = 0;
355 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
356 pDataFlash->pDataFlashDesc->command[4] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
359 pDataFlash->pDataFlashDesc->command[2] = (unsigned char)(((unsigned int)(bufferAddress & pDataFlash->pDevice->byte_mask)) >> 8) ;
360 pDataFlash->pDataFlashDesc->command[3] = (unsigned char)((unsigned int)bufferAddress & 0x00FF) ;
361 pDataFlash->pDataFlashDesc->command[4] = 0;
365 pDataFlash->pDataFlashDesc->tx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
366 pDataFlash->pDataFlashDesc->tx_cmd_size = cmdsize ;
367 pDataFlash->pDataFlashDesc->rx_cmd_pt = pDataFlash->pDataFlashDesc->command ;
368 pDataFlash->pDataFlashDesc->rx_cmd_size = cmdsize ;
370 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer ;
371 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer ;
372 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite ;
373 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite ;
375 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
378 /*------------------------------------------------------------------------------*/
379 /* Function Name : AT91F_PageErase */
380 /* Object : Erase a page */
381 /* Input Parameters : DataFlash Service */
382 /* : Page concerned */
384 /* Return value : State of the dataflash */
385 /*------------------------------------------------------------------------------*/
386 AT91S_DataFlashStatus AT91F_PageErase(
387 AT91PS_DataFlash pDataFlash,
391 /* Test if the buffer command is legal */
392 /* no data to transmit or receive */
393 pDataFlash->pDataFlashDesc->tx_data_size = 0;
396 if (pDataFlash->pDevice->pages_number >= 16384)
398 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_ERASE, cmdsize, page*pDataFlash->pDevice->pages_size));
402 /*------------------------------------------------------------------------------*/
403 /* Function Name : AT91F_BlockErase */
404 /* Object : Erase a Block */
405 /* Input Parameters : DataFlash Service */
406 /* : Page concerned */
408 /* Return value : State of the dataflash */
409 /*------------------------------------------------------------------------------*/
410 AT91S_DataFlashStatus AT91F_BlockErase(
411 AT91PS_DataFlash pDataFlash,
415 /* Test if the buffer command is legal */
416 /* no data to transmit or receive */
417 pDataFlash->pDataFlashDesc->tx_data_size = 0;
419 if (pDataFlash->pDevice->pages_number >= 16384)
421 return(AT91F_DataFlashSendCommand (pDataFlash, DB_BLOCK_ERASE,cmdsize, block*8*pDataFlash->pDevice->pages_size));
424 /*------------------------------------------------------------------------------*/
425 /* Function Name : AT91F_WriteBufferToMain */
426 /* Object : Write buffer to the main memory */
427 /* Input Parameters : DataFlash Service */
428 /* : <BufferCommand> = command to send to buffer1 or buffer2 */
429 /* : <dest> = main memory address */
430 /* Return value : State of the dataflash */
431 /*------------------------------------------------------------------------------*/
432 AT91S_DataFlashStatus AT91F_WriteBufferToMain (
433 AT91PS_DataFlash pDataFlash,
434 unsigned char BufferCommand,
438 /* Test if the buffer command is correct */
439 if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
440 (BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
441 (BufferCommand != DB_BUF2_PAGE_PGM) &&
442 (BufferCommand != DB_BUF2_PAGE_ERASE_PGM) )
443 return DATAFLASH_BAD_COMMAND;
445 /* no data to transmit or receive */
446 pDataFlash->pDataFlashDesc->tx_data_size = 0;
449 if (pDataFlash->pDevice->pages_number >= 16384)
451 /* Send the command to the dataflash */
452 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize, dest));
456 /*------------------------------------------------------------------------------*/
457 /* Function Name : AT91F_PartialPageWrite */
458 /* Object : Erase partielly a page */
459 /* Input Parameters : <page> = page number */
460 /* : <AdrInpage> = adr to begin the fading */
461 /* : <length> = Number of bytes to erase */
462 /*------------------------------------------------------------------------------*/
463 AT91S_DataFlashStatus AT91F_PartialPageWrite (
464 AT91PS_DataFlash pDataFlash,
470 unsigned int AdrInPage;
472 page = dest / (pDataFlash->pDevice->pages_size);
473 AdrInPage = dest % (pDataFlash->pDevice->pages_size);
475 /* Read the contents of the page in the Sram Buffer */
476 AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
477 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
478 /*Update the SRAM buffer */
479 AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, AdrInPage, size);
481 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
483 /* Erase page if a 128 Mbits device */
484 if (pDataFlash->pDevice->pages_number >= 16384) {
485 AT91F_PageErase(pDataFlash, page);
486 /* Rewrite the modified Sram Buffer in the main memory */
487 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
490 /* Rewrite the modified Sram Buffer in the main memory */
491 return(AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM, (page*pDataFlash->pDevice->pages_size)));
495 /*------------------------------------------------------------------------------*/
496 /* Function Name : AT91F_DataFlashWrite */
498 /* Input Parameters : <*src> = Source buffer */
499 /* : <dest> = dataflash adress */
500 /* : <size> = data buffer size */
501 /*------------------------------------------------------------------------------*/
502 AT91S_DataFlashStatus AT91F_DataFlashWrite(
503 AT91PS_DataFlash pDataFlash,
512 AT91F_SpiEnable(pDataFlash->pDevice->cs);
514 if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
515 return DATAFLASH_MEMORY_OVERFLOW;
517 /* If destination does not fit a page start address */
518 if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0 ) {
519 length = pDataFlash->pDevice->pages_size - (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
524 if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
525 return DATAFLASH_ERROR;
527 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
529 /* Update size, source and destination pointers */
535 while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
536 /* program dataflash page */
537 page = (unsigned int)dest / (pDataFlash->pDevice->pages_size);
539 status = AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, 0, pDataFlash->pDevice->pages_size);
540 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
542 status = AT91F_PageErase(pDataFlash, page);
543 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
545 return DATAFLASH_ERROR;
547 status = AT91F_WriteBufferToMain (pDataFlash, DB_BUF1_PAGE_PGM, dest);
549 return DATAFLASH_ERROR;
551 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
553 /* Update size, source and destination pointers */
554 size -= pDataFlash->pDevice->pages_size ;
555 dest += pDataFlash->pDevice->pages_size ;
556 src += pDataFlash->pDevice->pages_size ;
559 /* If still some bytes to read */
561 /* program dataflash page */
562 if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
563 return DATAFLASH_ERROR;
565 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
571 /*------------------------------------------------------------------------------*/
572 /* Function Name : AT91F_DataFlashRead */
573 /* Object : Read a block in dataflash */
574 /* Input Parameters : */
576 /*------------------------------------------------------------------------------*/
577 int AT91F_DataFlashRead(
578 AT91PS_DataFlash pDataFlash,
583 unsigned long SizeToRead;
585 AT91F_SpiEnable(pDataFlash->pDevice->cs);
587 if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
591 SizeToRead = (size < 0x8000)? size:0x8000;
593 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
596 if (AT91F_DataFlashContinuousRead (pDataFlash, addr, (uchar *)buffer, SizeToRead) != DATAFLASH_OK)
601 buffer += SizeToRead;
608 /*------------------------------------------------------------------------------*/
609 /* Function Name : AT91F_DataflashProbe */
611 /* Input Parameters : */
612 /* Return value : Dataflash status register */
613 /*------------------------------------------------------------------------------*/
614 int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
617 AT91F_DataFlashGetStatus(pDesc);
618 return((pDesc->command[1] == 0xFF)? 0: pDesc->command[1] & 0x3C);