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git01.mediatek.com / filogic / uboot / 8d769de02b34238ec774e2e91d386f7d045ac8d5 / . / board / cmc_pu2 / at45.c
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wdenk70ae5b42004-10-10 17:05:18 +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 AT91C_SPI_CLK 10000000 /* Max Value = 10MHz to be compliant to
29the Continuous Array Read function */
30
31/* AC Characteristics */
32/* DLYBS = tCSS = 250ns min and DLYBCT = tCSH = 250ns */
33#define DATAFLASH_TCSS (0xC << 16)
34#define DATAFLASH_TCHS (0x1 << 24)
35
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 */
39
40void AT91F_SpiInit(void) {
41
42/*-------------------------------------------------------------------*/
43/* SPI DataFlash Init */
44/*-------------------------------------------------------------------*/
45 /* Configure PIOs */
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;
50 /* Enable CLock */
51 AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_SPI;
52
53 /* Reset the SPI */
54 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SWRST;
55
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;
58
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);
62
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);
65
66}
67
68void AT91F_SpiEnable(int cs) {
69 switch(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);
73 break;
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 */
78 /* Clear Output */
79 AT91C_BASE_PIOB->PIO_CODR = AT91C_PIO_PB7;
80 /* Configure PCS */
81 AT91C_BASE_SPI->SPI_MR &= 0xFFF0FFFF;
82 AT91C_BASE_SPI->SPI_MR |= ((AT91C_SPI_PCS3_DATAFLASH_CARD<<16) & AT91C_SPI_PCS);
83 break;
84 }
85
86 /* SPI_Enable */
87 AT91C_BASE_SPI->SPI_CR = AT91C_SPI_SPIEN;
88}
89
90/*----------------------------------------------------------------------------*/
91/* \fn AT91F_SpiWrite */
92/* \brief Set the PDC registers for a transfert */
93/*----------------------------------------------------------------------------*/
94unsigned int AT91F_SpiWrite ( AT91PS_DataflashDesc pDesc )
95{
96 unsigned int timeout;
97
98 pDesc->state = BUSY;
99
100 AT91C_BASE_SPI->SPI_PTCR = AT91C_PDC_TXTDIS + AT91C_PDC_RXTDIS;
101
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 ;
105
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;
109
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 ;
114
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 ;
118 }
119
120 /* arm simple, non interrupt dependent timer */
121 reset_timer_masked();
122 timeout = 0;
123
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;
127 pDesc->state = IDLE;
128
129 if (timeout >= CFG_SPI_WRITE_TOUT){
130 printf("Error Timeout\n\r");
131 return DATAFLASH_ERROR;
132 }
133
134 return DATAFLASH_OK;
135}
136
137
138/*----------------------------------------------------------------------*/
139/* \fn AT91F_DataFlashSendCommand */
140/* \brief Generic function to send a command to the dataflash */
141/*----------------------------------------------------------------------*/
142AT91S_DataFlashStatus AT91F_DataFlashSendCommand(
143 AT91PS_DataFlash pDataFlash,
144 unsigned char OpCode,
145 unsigned int CmdSize,
146 unsigned int DataflashAddress)
147{
148 unsigned int adr;
149
150 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
151 return DATAFLASH_BUSY;
152
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));
155
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);
163 } else {
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;
168 }
169 pDataFlash->pDataFlashDesc->command[5] = 0;
170 pDataFlash->pDataFlashDesc->command[6] = 0;
171 pDataFlash->pDataFlashDesc->command[7] = 0;
172
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 ;
178
179 /* send the command and read the data */
180 return AT91F_SpiWrite (pDataFlash->pDataFlashDesc);
181}
182
183
184/*----------------------------------------------------------------------*/
185/* \fn AT91F_DataFlashGetStatus */
186/* \brief Read the status register of the dataflash */
187/*----------------------------------------------------------------------*/
188AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
189{
190 AT91S_DataFlashStatus status;
191
192 /* if a transfert is in progress ==> return 0 */
193 if( (pDesc->state) != IDLE)
194 return DATAFLASH_BUSY;
195
196 /* first send the read status command (D7H) */
197 pDesc->command[0] = DB_STATUS;
198 pDesc->command[1] = 0;
199
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);
207
208 pDesc->DataFlash_state = *( (unsigned char *) (pDesc->rx_cmd_pt) +1);
209
210 return status;
211}
212
213
214/*----------------------------------------------------------------------*/
215/* \fn AT91F_DataFlashWaitReady */
216/* \brief wait for dataflash ready (bit7 of the status register == 1) */
217/*----------------------------------------------------------------------*/
218AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
219{
220 pDataFlashDesc->DataFlash_state = IDLE;
221
222 do {
223 AT91F_DataFlashGetStatus(pDataFlashDesc);
224 timeout--;
225 } while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout > 0) );
226
227 if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
228 return DATAFLASH_ERROR;
229
230 return DATAFLASH_OK;
231}
232
233
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/*------------------------------------------------------------------------------*/
243AT91S_DataFlashStatus AT91F_DataFlashContinuousRead (
244 AT91PS_DataFlash pDataFlash,
245 int src,
246 unsigned char *dataBuffer,
247 int sizeToRead )
248{
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;
253
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;
258
259 status = AT91F_DataFlashSendCommand (pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
260 /* Send the command to the dataflash */
261 return(status);
262}
263
264
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/*------------------------------------------------------------------------------*/
274AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(
275 AT91PS_DataFlash pDataFlash,
276 unsigned char *src,
277 unsigned int dest,
278 unsigned int SizeToWrite)
279{
280 int cmdsize;
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;
285
286 cmdsize = 4;
287 /* Send the command to the dataflash */
288 if (pDataFlash->pDevice->pages_number >= 16384)
289 cmdsize = 5;
290 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_PGM_BUF1, cmdsize, dest));
291}
292
293
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 */
299/* : */
300/* Return value : State of the dataflash */
301/*------------------------------------------------------------------------------*/
302AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
303 AT91PS_DataFlash pDataFlash,
304 unsigned char BufferCommand,
305 unsigned int page)
306{
307 int cmdsize;
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;
311
312 /* no data to transmit or receive */
313 pDataFlash->pDataFlashDesc->tx_data_size = 0;
314 cmdsize = 4;
315 if (pDataFlash->pDevice->pages_number >= 16384)
316 cmdsize = 5;
317 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize, page*pDataFlash->pDevice->pages_size));
318}
319
320
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/*------------------------------------------------------------------------------*/
331AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer (
332 AT91PS_DataFlash pDataFlash,
333 unsigned char BufferCommand,
334 unsigned char *dataBuffer,
335 unsigned int bufferAddress,
336 int SizeToWrite )
337{
338 int cmdsize;
339 /* Test if the buffer command is legal */
340 if ((BufferCommand != DB_BUF1_WRITE) && (BufferCommand != DB_BUF2_WRITE))
341 return DATAFLASH_BAD_COMMAND;
342
343 /* buffer address must be lower than page size */
344 if (bufferAddress > pDataFlash->pDevice->pages_size)
345 return DATAFLASH_BAD_ADDRESS;
346
347 if ( (pDataFlash->pDataFlashDesc->state) != IDLE)
348 return DATAFLASH_BUSY;
349
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) ;
357 cmdsize = 5;
358 } else {
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;
362 cmdsize = 4;
363 }
364
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 ;
369
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 ;
374
375 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
376}
377
378/*------------------------------------------------------------------------------*/
379/* Function Name : AT91F_PageErase */
380/* Object : Erase a page */
381/* Input Parameters : DataFlash Service */
382/* : Page concerned */
383/* : */
384/* Return value : State of the dataflash */
385/*------------------------------------------------------------------------------*/
386AT91S_DataFlashStatus AT91F_PageErase(
387 AT91PS_DataFlash pDataFlash,
388 unsigned int page)
389{
390 int cmdsize;
391 /* Test if the buffer command is legal */
392 /* no data to transmit or receive */
393 pDataFlash->pDataFlashDesc->tx_data_size = 0;
394
395 cmdsize = 4;
396 if (pDataFlash->pDevice->pages_number >= 16384)
397 cmdsize = 5;
398 return(AT91F_DataFlashSendCommand (pDataFlash, DB_PAGE_ERASE, cmdsize, page*pDataFlash->pDevice->pages_size));
399}
400
401
402/*------------------------------------------------------------------------------*/
403/* Function Name : AT91F_BlockErase */
404/* Object : Erase a Block */
405/* Input Parameters : DataFlash Service */
406/* : Page concerned */
407/* : */
408/* Return value : State of the dataflash */
409/*------------------------------------------------------------------------------*/
410AT91S_DataFlashStatus AT91F_BlockErase(
411 AT91PS_DataFlash pDataFlash,
412 unsigned int block)
413{
414 int cmdsize;
415 /* Test if the buffer command is legal */
416 /* no data to transmit or receive */
417 pDataFlash->pDataFlashDesc->tx_data_size = 0;
418 cmdsize = 4;
419 if (pDataFlash->pDevice->pages_number >= 16384)
420 cmdsize = 5;
421 return(AT91F_DataFlashSendCommand (pDataFlash, DB_BLOCK_ERASE,cmdsize, block*8*pDataFlash->pDevice->pages_size));
422}
423
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/*------------------------------------------------------------------------------*/
432AT91S_DataFlashStatus AT91F_WriteBufferToMain (
433 AT91PS_DataFlash pDataFlash,
434 unsigned char BufferCommand,
435 unsigned int dest )
436{
437 int cmdsize;
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;
444
445 /* no data to transmit or receive */
446 pDataFlash->pDataFlashDesc->tx_data_size = 0;
447
448 cmdsize = 4;
449 if (pDataFlash->pDevice->pages_number >= 16384)
450 cmdsize = 5;
451 /* Send the command to the dataflash */
452 return(AT91F_DataFlashSendCommand (pDataFlash, BufferCommand, cmdsize, dest));
453}
454
455
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/*------------------------------------------------------------------------------*/
463AT91S_DataFlashStatus AT91F_PartialPageWrite (
464 AT91PS_DataFlash pDataFlash,
465 unsigned char *src,
466 unsigned int dest,
467 unsigned int size)
468{
469 unsigned int page;
470 unsigned int AdrInPage;
471
472 page = dest / (pDataFlash->pDevice->pages_size);
473 AdrInPage = dest % (pDataFlash->pDevice->pages_size);
474
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);
480
481 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
482
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);
488 }
489
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)));
492}
493
494
495/*------------------------------------------------------------------------------*/
496/* Function Name : AT91F_DataFlashWrite */
497/* Object : */
498/* Input Parameters : <*src> = Source buffer */
499/* : <dest> = dataflash adress */
500/* : <size> = data buffer size */
501/*------------------------------------------------------------------------------*/
502AT91S_DataFlashStatus AT91F_DataFlashWrite(
503 AT91PS_DataFlash pDataFlash,
504 unsigned char *src,
505 int dest,
506 int size )
507{
508 unsigned int length;
509 unsigned int page;
510 unsigned int status;
511
512 AT91F_SpiEnable(pDataFlash->pDevice->cs);
513
514 if ( (dest + size) > (pDataFlash->pDevice->pages_size * (pDataFlash->pDevice->pages_number)))
515 return DATAFLASH_MEMORY_OVERFLOW;
516
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)));
520
521 if (size < length)
522 length = size;
523
524 if(!AT91F_PartialPageWrite(pDataFlash,src, dest, length))
525 return DATAFLASH_ERROR;
526
527 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
528
529 /* Update size, source and destination pointers */
530 size -= length;
531 dest += length;
532 src += length;
533 }
534
535 while (( size - pDataFlash->pDevice->pages_size ) >= 0 ) {
536 /* program dataflash page */
537 page = (unsigned int)dest / (pDataFlash->pDevice->pages_size);
538
539 status = AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src, 0, pDataFlash->pDevice->pages_size);
540 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
541
542 status = AT91F_PageErase(pDataFlash, page);
543 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
544 if (!status)
545 return DATAFLASH_ERROR;
546
547 status = AT91F_WriteBufferToMain (pDataFlash, DB_BUF1_PAGE_PGM, dest);
548 if(!status)
549 return DATAFLASH_ERROR;
550
551 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
552
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 ;
557 }
558
559 /* If still some bytes to read */
560 if ( size > 0 ) {
561 /* program dataflash page */
562 if(!AT91F_PartialPageWrite(pDataFlash, src, dest, size) )
563 return DATAFLASH_ERROR;
564
565 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY);
566 }
567 return DATAFLASH_OK;
568}
569
570
571/*------------------------------------------------------------------------------*/
572/* Function Name : AT91F_DataFlashRead */
573/* Object : Read a block in dataflash */
574/* Input Parameters : */
575/* Return value : */
576/*------------------------------------------------------------------------------*/
577int AT91F_DataFlashRead(
578 AT91PS_DataFlash pDataFlash,
579 unsigned long addr,
580 unsigned long size,
581 char *buffer)
582{
583 unsigned long SizeToRead;
584
585 AT91F_SpiEnable(pDataFlash->pDevice->cs);
586
587 if(AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
588 return -1;
589
590 while (size) {
591 SizeToRead = (size < 0x8000)? size:0x8000;
592
593 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc, AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
594 return -1;
595
596 if (AT91F_DataFlashContinuousRead (pDataFlash, addr, buffer, SizeToRead) != DATAFLASH_OK)
597 return -1;
598
599 size -= SizeToRead;
600 addr += SizeToRead;
601 buffer += SizeToRead;
602 }
603
604 return DATAFLASH_OK;
605}
606
607
608/*------------------------------------------------------------------------------*/
609/* Function Name : AT91F_DataflashProbe */
610/* Object : */
611/* Input Parameters : */
612/* Return value : Dataflash status register */
613/*------------------------------------------------------------------------------*/
614int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
615{
616 AT91F_SpiEnable(cs);
617 AT91F_DataFlashGetStatus(pDesc);
618 return((pDesc->command[1] == 0xFF)? 0: pDesc->command[1] & 0x3C);
619}
620
621#endif