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add SDHC support in mmc driver
[u-boot-openmoko/mini2440.git] / drivers / mtd / at45.c
blobdac987a43a569891943531b6325d540c35c5cf0f
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
24 #ifdef CONFIG_HAS_DATAFLASH
25 #include <dataflash.h>
26
27 /*
28 * spi.c API
29 */
30 extern unsigned int AT91F_SpiWrite(AT91PS_DataflashDesc pDesc);
31 extern void AT91F_SpiEnable(int cs);
32
33 #define AT91C_TIMEOUT_WRDY 200000
34
35 /*----------------------------------------------------------------------*/
36 /* \fn AT91F_DataFlashSendCommand */
37 /* \brief Generic function to send a command to the dataflash */
38 /*----------------------------------------------------------------------*/
39 AT91S_DataFlashStatus AT91F_DataFlashSendCommand(AT91PS_DataFlash pDataFlash,
40 unsigned char OpCode,
41 unsigned int CmdSize,
42 unsigned int DataflashAddress)
43 {
44 unsigned int adr;
45
46 if ((pDataFlash->pDataFlashDesc->state) != IDLE)
47 return DATAFLASH_BUSY;
48
49 /* process the address to obtain page address and byte address */
50 adr = ((DataflashAddress / (pDataFlash->pDevice->pages_size)) <<
51 pDataFlash->pDevice->page_offset) +
52 (DataflashAddress % (pDataFlash->pDevice->pages_size));
53
54 /* fill the command buffer */
55 pDataFlash->pDataFlashDesc->command[0] = OpCode;
56 if (pDataFlash->pDevice->pages_number >= 16384) {
57 pDataFlash->pDataFlashDesc->command[1] =
58 (unsigned char)((adr & 0x0F000000) >> 24);
59 pDataFlash->pDataFlashDesc->command[2] =
60 (unsigned char)((adr & 0x00FF0000) >> 16);
61 pDataFlash->pDataFlashDesc->command[3] =
62 (unsigned char)((adr & 0x0000FF00) >> 8);
63 pDataFlash->pDataFlashDesc->command[4] =
64 (unsigned char)(adr & 0x000000FF);
65 } else {
66 pDataFlash->pDataFlashDesc->command[1] =
67 (unsigned char)((adr & 0x00FF0000) >> 16);
68 pDataFlash->pDataFlashDesc->command[2] =
69 (unsigned char)((adr & 0x0000FF00) >> 8);
70 pDataFlash->pDataFlashDesc->command[3] =
71 (unsigned char)(adr & 0x000000FF);
72 pDataFlash->pDataFlashDesc->command[4] = 0;
73 }
74 pDataFlash->pDataFlashDesc->command[5] = 0;
75 pDataFlash->pDataFlashDesc->command[6] = 0;
76 pDataFlash->pDataFlashDesc->command[7] = 0;
77
78 /* Initialize the SpiData structure for the spi write fuction */
79 pDataFlash->pDataFlashDesc->tx_cmd_pt =
80 pDataFlash->pDataFlashDesc->command;
81 pDataFlash->pDataFlashDesc->tx_cmd_size = CmdSize;
82 pDataFlash->pDataFlashDesc->rx_cmd_pt =
83 pDataFlash->pDataFlashDesc->command;
84 pDataFlash->pDataFlashDesc->rx_cmd_size = CmdSize;
85
86 /* send the command and read the data */
87 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
88 }
89
90 /*----------------------------------------------------------------------*/
91 /* \fn AT91F_DataFlashGetStatus */
92 /* \brief Read the status register of the dataflash */
93 /*----------------------------------------------------------------------*/
94 AT91S_DataFlashStatus AT91F_DataFlashGetStatus(AT91PS_DataflashDesc pDesc)
95 {
96 AT91S_DataFlashStatus status;
97
98 /* if a transfert is in progress ==> return 0 */
99 if ((pDesc->state) != IDLE)
100 return DATAFLASH_BUSY;
101
102 /* first send the read status command (D7H) */
103 pDesc->command[0] = DB_STATUS;
104 pDesc->command[1] = 0;
105
106 pDesc->DataFlash_state = GET_STATUS;
107 pDesc->tx_data_size = 0; /* Transmit the command */
108 /* and receive response */
109 pDesc->tx_cmd_pt = pDesc->command;
110 pDesc->rx_cmd_pt = pDesc->command;
111 pDesc->rx_cmd_size = 2;
112 pDesc->tx_cmd_size = 2;
113 status = AT91F_SpiWrite(pDesc);
114
115 pDesc->DataFlash_state = *((unsigned char *)(pDesc->rx_cmd_pt) + 1);
116
117 return status;
118 }
119
120 /*----------------------------------------------------------------------*/
121 /* \fn AT91F_DataFlashWaitReady */
122 /* \brief wait for dataflash ready (bit7 of the status register == 1) */
123 /*----------------------------------------------------------------------*/
124 AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc
125 pDataFlashDesc,
126 unsigned int timeout)
127 {
128 pDataFlashDesc->DataFlash_state = IDLE;
129
130 do {
131 AT91F_DataFlashGetStatus(pDataFlashDesc);
132 timeout--;
133 } while (((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) &&
134 (timeout > 0));
135
136 if ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
137 return DATAFLASH_ERROR;
138
139 return DATAFLASH_OK;
140 }
141
142 /*--------------------------------------------------------------------------*/
143 /* Function Name : AT91F_DataFlashContinuousRead */
144 /* Object : Continuous stream Read */
145 /* Input Parameters : DataFlash Service */
146 /* : <src> = dataflash address */
147 /* : <*dataBuffer> = data buffer pointer */
148 /* : <sizeToRead> = data buffer size */
149 /* Return value : State of the dataflash */
150 /*--------------------------------------------------------------------------*/
151 AT91S_DataFlashStatus AT91F_DataFlashContinuousRead(
152 AT91PS_DataFlash pDataFlash,
153 int src,
154 unsigned char *dataBuffer,
155 int sizeToRead)
156 {
157 AT91S_DataFlashStatus status;
158 /* Test the size to read in the device */
159 if ((src + sizeToRead) >
160 (pDataFlash->pDevice->pages_size *
161 (pDataFlash->pDevice->pages_number)))
162 return DATAFLASH_MEMORY_OVERFLOW;
163
164 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
165 pDataFlash->pDataFlashDesc->rx_data_size = sizeToRead;
166 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
167 pDataFlash->pDataFlashDesc->tx_data_size = sizeToRead;
168
169 status = AT91F_DataFlashSendCommand(
170 pDataFlash, DB_CONTINUOUS_ARRAY_READ, 8, src);
171 /* Send the command to the dataflash */
172 return (status);
173 }
174
175 /*---------------------------------------------------------------------------*/
176 /* Function Name : AT91F_DataFlashPagePgmBuf */
177 /* Object : Main memory page program thru buffer 1 or buffer 2 */
178 /* Input Parameters : DataFlash Service */
179 /* : <*src> = Source buffer */
180 /* : <dest> = dataflash destination address */
181 /* : <SizeToWrite> = data buffer size */
182 /* Return value : State of the dataflash */
183 /*---------------------------------------------------------------------------*/
184 AT91S_DataFlashStatus AT91F_DataFlashPagePgmBuf(AT91PS_DataFlash pDataFlash,
185 unsigned char *src,
186 unsigned int dest,
187 unsigned int SizeToWrite)
188 {
189 int cmdsize;
190 pDataFlash->pDataFlashDesc->tx_data_pt = src;
191 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite;
192 pDataFlash->pDataFlashDesc->rx_data_pt = src;
193 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
194
195 cmdsize = 4;
196 /* Send the command to the dataflash */
197 if (pDataFlash->pDevice->pages_number >= 16384)
198 cmdsize = 5;
199 return (AT91F_DataFlashSendCommand(
200 pDataFlash, DB_PAGE_PGM_BUF1, cmdsize, dest));
201 }
202
203 /*---------------------------------------------------------------------------*/
204 /* Function Name : AT91F_MainMemoryToBufferTransfert */
205 /* Object : Read a page in the SRAM Buffer 1 or 2 */
206 /* Input Parameters : DataFlash Service */
207 /* : Page concerned */
208 /* : */
209 /* Return value : State of the dataflash */
210 /*---------------------------------------------------------------------------*/
211 AT91S_DataFlashStatus AT91F_MainMemoryToBufferTransfert(
212 AT91PS_DataFlash
213 pDataFlash,
214 unsigned char
215 BufferCommand,
216 unsigned int page)
217 {
218 int cmdsize;
219 /* Test if the buffer command is legal */
220 if ((BufferCommand != DB_PAGE_2_BUF1_TRF) &&
221 (BufferCommand != DB_PAGE_2_BUF2_TRF)) {
222 return DATAFLASH_BAD_COMMAND;
223 }
224
225 /* no data to transmit or receive */
226 pDataFlash->pDataFlashDesc->tx_data_size = 0;
227 cmdsize = 4;
228 if (pDataFlash->pDevice->pages_number >= 16384)
229 cmdsize = 5;
230 return (AT91F_DataFlashSendCommand(
231 pDataFlash, BufferCommand, cmdsize,
232 page * pDataFlash->pDevice->pages_size));
233 }
234
235 /*-------------------------------------------------------------------------- */
236 /* Function Name : AT91F_DataFlashWriteBuffer */
237 /* Object : Write data to the internal sram buffer 1 or 2 */
238 /* Input Parameters : DataFlash Service */
239 /* : <BufferCommand> = command to write buffer1 or 2 */
240 /* : <*dataBuffer> = data buffer to write */
241 /* : <bufferAddress> = address in the internal buffer */
242 /* : <SizeToWrite> = data buffer size */
243 /* Return value : State of the dataflash */
244 /*---------------------------------------------------------------------------*/
245 AT91S_DataFlashStatus AT91F_DataFlashWriteBuffer(
246 AT91PS_DataFlash pDataFlash,
247 unsigned char BufferCommand,
248 unsigned char *dataBuffer,
249 unsigned int bufferAddress,
250 int SizeToWrite)
251 {
252 int cmdsize;
253 /* Test if the buffer command is legal */
254 if ((BufferCommand != DB_BUF1_WRITE) &&
255 (BufferCommand != DB_BUF2_WRITE)) {
256 return DATAFLASH_BAD_COMMAND;
257 }
258
259 /* buffer address must be lower than page size */
260 if (bufferAddress > pDataFlash->pDevice->pages_size)
261 return DATAFLASH_BAD_ADDRESS;
262
263 if ((pDataFlash->pDataFlashDesc->state) != IDLE)
264 return DATAFLASH_BUSY;
265
266 /* Send first Write Command */
267 pDataFlash->pDataFlashDesc->command[0] = BufferCommand;
268 pDataFlash->pDataFlashDesc->command[1] = 0;
269 if (pDataFlash->pDevice->pages_number >= 16384) {
270 pDataFlash->pDataFlashDesc->command[2] = 0;
271 pDataFlash->pDataFlashDesc->command[3] =
272 (unsigned char)(((unsigned int)(bufferAddress &
273 pDataFlash->pDevice->
274 byte_mask)) >> 8);
275 pDataFlash->pDataFlashDesc->command[4] =
276 (unsigned char)((unsigned int)bufferAddress & 0x00FF);
277 cmdsize = 5;
278 } else {
279 pDataFlash->pDataFlashDesc->command[2] =
280 (unsigned char)(((unsigned int)(bufferAddress &
281 pDataFlash->pDevice->
282 byte_mask)) >> 8);
283 pDataFlash->pDataFlashDesc->command[3] =
284 (unsigned char)((unsigned int)bufferAddress & 0x00FF);
285 pDataFlash->pDataFlashDesc->command[4] = 0;
286 cmdsize = 4;
287 }
288
289 pDataFlash->pDataFlashDesc->tx_cmd_pt =
290 pDataFlash->pDataFlashDesc->command;
291 pDataFlash->pDataFlashDesc->tx_cmd_size = cmdsize;
292 pDataFlash->pDataFlashDesc->rx_cmd_pt =
293 pDataFlash->pDataFlashDesc->command;
294 pDataFlash->pDataFlashDesc->rx_cmd_size = cmdsize;
295
296 pDataFlash->pDataFlashDesc->rx_data_pt = dataBuffer;
297 pDataFlash->pDataFlashDesc->tx_data_pt = dataBuffer;
298 pDataFlash->pDataFlashDesc->rx_data_size = SizeToWrite;
299 pDataFlash->pDataFlashDesc->tx_data_size = SizeToWrite;
300
301 return AT91F_SpiWrite(pDataFlash->pDataFlashDesc);
302 }
303
304 /*---------------------------------------------------------------------------*/
305 /* Function Name : AT91F_PageErase */
306 /* Object : Erase a page */
307 /* Input Parameters : DataFlash Service */
308 /* : Page concerned */
309 /* : */
310 /* Return value : State of the dataflash */
311 /*---------------------------------------------------------------------------*/
312 AT91S_DataFlashStatus AT91F_PageErase(
313 AT91PS_DataFlash pDataFlash,
314 unsigned int page)
315 {
316 int cmdsize;
317 /* Test if the buffer command is legal */
318 /* no data to transmit or receive */
319 pDataFlash->pDataFlashDesc->tx_data_size = 0;
320
321 cmdsize = 4;
322 if (pDataFlash->pDevice->pages_number >= 16384)
323 cmdsize = 5;
324 return (AT91F_DataFlashSendCommand(pDataFlash,
325 DB_PAGE_ERASE, cmdsize,
326 page * pDataFlash->pDevice->pages_size));
327 }
328
329 /*---------------------------------------------------------------------------*/
330 /* Function Name : AT91F_BlockErase */
331 /* Object : Erase a Block */
332 /* Input Parameters : DataFlash Service */
333 /* : Page concerned */
334 /* : */
335 /* Return value : State of the dataflash */
336 /*---------------------------------------------------------------------------*/
337 AT91S_DataFlashStatus AT91F_BlockErase(
338 AT91PS_DataFlash pDataFlash,
339 unsigned int block)
340 {
341 int cmdsize;
342 /* Test if the buffer command is legal */
343 /* no data to transmit or receive */
344 pDataFlash->pDataFlashDesc->tx_data_size = 0;
345 cmdsize = 4;
346 if (pDataFlash->pDevice->pages_number >= 16384)
347 cmdsize = 5;
348 return (AT91F_DataFlashSendCommand(pDataFlash, DB_BLOCK_ERASE, cmdsize,
349 block * 8 *
350 pDataFlash->pDevice->pages_size));
351 }
352
353 /*---------------------------------------------------------------------------*/
354 /* Function Name : AT91F_WriteBufferToMain */
355 /* Object : Write buffer to the main memory */
356 /* Input Parameters : DataFlash Service */
357 /* : <BufferCommand> = command to send to buffer1 or buffer2 */
358 /* : <dest> = main memory address */
359 /* Return value : State of the dataflash */
360 /*---------------------------------------------------------------------------*/
361 AT91S_DataFlashStatus AT91F_WriteBufferToMain(AT91PS_DataFlash pDataFlash,
362 unsigned char BufferCommand,
363 unsigned int dest)
364 {
365 int cmdsize;
366 /* Test if the buffer command is correct */
367 if ((BufferCommand != DB_BUF1_PAGE_PGM) &&
368 (BufferCommand != DB_BUF1_PAGE_ERASE_PGM) &&
369 (BufferCommand != DB_BUF2_PAGE_PGM) &&
370 (BufferCommand != DB_BUF2_PAGE_ERASE_PGM))
371 return DATAFLASH_BAD_COMMAND;
372
373 /* no data to transmit or receive */
374 pDataFlash->pDataFlashDesc->tx_data_size = 0;
375
376 cmdsize = 4;
377 if (pDataFlash->pDevice->pages_number >= 16384)
378 cmdsize = 5;
379 /* Send the command to the dataflash */
380 return (AT91F_DataFlashSendCommand(pDataFlash, BufferCommand,
381 cmdsize, dest));
382 }
383
384 /*---------------------------------------------------------------------------*/
385 /* Function Name : AT91F_PartialPageWrite */
386 /* Object : Erase partielly a page */
387 /* Input Parameters : <page> = page number */
388 /* : <AdrInpage> = adr to begin the fading */
389 /* : <length> = Number of bytes to erase */
390 /*---------------------------------------------------------------------------*/
391 AT91S_DataFlashStatus AT91F_PartialPageWrite(AT91PS_DataFlash pDataFlash,
392 unsigned char *src,
393 unsigned int dest,
394 unsigned int size)
395 {
396 unsigned int page;
397 unsigned int AdrInPage;
398
399 page = dest / (pDataFlash->pDevice->pages_size);
400 AdrInPage = dest % (pDataFlash->pDevice->pages_size);
401
402 /* Read the contents of the page in the Sram Buffer */
403 AT91F_MainMemoryToBufferTransfert(pDataFlash, DB_PAGE_2_BUF1_TRF, page);
404 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
405 AT91C_TIMEOUT_WRDY);
406 /*Update the SRAM buffer */
407 AT91F_DataFlashWriteBuffer(pDataFlash, DB_BUF1_WRITE, src,
408 AdrInPage, size);
409
410 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
411 AT91C_TIMEOUT_WRDY);
412
413 /* Erase page if a 128 Mbits device */
414 if (pDataFlash->pDevice->pages_number >= 16384) {
415 AT91F_PageErase(pDataFlash, page);
416 /* Rewrite the modified Sram Buffer in the main memory */
417 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
418 AT91C_TIMEOUT_WRDY);
419 }
420
421 /* Rewrite the modified Sram Buffer in the main memory */
422 return (AT91F_WriteBufferToMain(pDataFlash, DB_BUF1_PAGE_ERASE_PGM,
423 (page *
424 pDataFlash->pDevice->pages_size)));
425 }
426
427 /*---------------------------------------------------------------------------*/
428 /* Function Name : AT91F_DataFlashWrite */
429 /* Object : */
430 /* Input Parameters : <*src> = Source buffer */
431 /* : <dest> = dataflash adress */
432 /* : <size> = data buffer size */
433 /*---------------------------------------------------------------------------*/
434 AT91S_DataFlashStatus AT91F_DataFlashWrite(AT91PS_DataFlash pDataFlash,
435 unsigned char *src,
436 int dest, int size)
437 {
438 unsigned int length;
439 unsigned int page;
440 unsigned int status;
441
442 AT91F_SpiEnable(pDataFlash->pDevice->cs);
443
444 if ((dest + size) > (pDataFlash->pDevice->pages_size *
445 (pDataFlash->pDevice->pages_number)))
446 return DATAFLASH_MEMORY_OVERFLOW;
447
448 /* If destination does not fit a page start address */
449 if ((dest % ((unsigned int)(pDataFlash->pDevice->pages_size))) != 0) {
450 length =
451 pDataFlash->pDevice->pages_size -
452 (dest % ((unsigned int)(pDataFlash->pDevice->pages_size)));
453
454 if (size < length)
455 length = size;
456
457 if (!AT91F_PartialPageWrite(pDataFlash, src, dest, length))
458 return DATAFLASH_ERROR;
459
460 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
461 AT91C_TIMEOUT_WRDY);
462
463 /* Update size, source and destination pointers */
464 size -= length;
465 dest += length;
466 src += length;
467 }
468
469 while ((size - pDataFlash->pDevice->pages_size) >= 0) {
470 /* program dataflash page */
471 page = (unsigned int)dest / (pDataFlash->pDevice->pages_size);
472
473 status = AT91F_DataFlashWriteBuffer(pDataFlash,
474 DB_BUF1_WRITE, src, 0,
475 pDataFlash->pDevice->
476 pages_size);
477 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
478 AT91C_TIMEOUT_WRDY);
479
480 status = AT91F_PageErase(pDataFlash, page);
481 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
482 AT91C_TIMEOUT_WRDY);
483 if (!status)
484 return DATAFLASH_ERROR;
485
486 status = AT91F_WriteBufferToMain(pDataFlash,
487 DB_BUF1_PAGE_PGM, dest);
488 if (!status)
489 return DATAFLASH_ERROR;
490
491 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
492 AT91C_TIMEOUT_WRDY);
493
494 /* Update size, source and destination pointers */
495 size -= pDataFlash->pDevice->pages_size;
496 dest += pDataFlash->pDevice->pages_size;
497 src += pDataFlash->pDevice->pages_size;
498 }
499
500 /* If still some bytes to read */
501 if (size > 0) {
502 /* program dataflash page */
503 if (!AT91F_PartialPageWrite(pDataFlash, src, dest, size))
504 return DATAFLASH_ERROR;
505
506 AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
507 AT91C_TIMEOUT_WRDY);
508 }
509 return DATAFLASH_OK;
510 }
511
512 /*---------------------------------------------------------------------------*/
513 /* Function Name : AT91F_DataFlashRead */
514 /* Object : Read a block in dataflash */
515 /* Input Parameters : */
516 /* Return value : */
517 /*---------------------------------------------------------------------------*/
518 int AT91F_DataFlashRead(AT91PS_DataFlash pDataFlash,
519 unsigned long addr, unsigned long size, char *buffer)
520 {
521 unsigned long SizeToRead;
522
523 AT91F_SpiEnable(pDataFlash->pDevice->cs);
524
525 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
526 AT91C_TIMEOUT_WRDY) != DATAFLASH_OK)
527 return -1;
528
529 while (size) {
530 SizeToRead = (size < 0x8000) ? size : 0x8000;
531
532 if (AT91F_DataFlashWaitReady(pDataFlash->pDataFlashDesc,
533 AT91C_TIMEOUT_WRDY) !=
534 DATAFLASH_OK)
535 return -1;
536
537 if (AT91F_DataFlashContinuousRead(pDataFlash, addr,
538 (uchar *) buffer,
539 SizeToRead) != DATAFLASH_OK)
540 return -1;
541
542 size -= SizeToRead;
543 addr += SizeToRead;
544 buffer += SizeToRead;
545 }
546
547 return DATAFLASH_OK;
548 }
549
550 /*---------------------------------------------------------------------------*/
551 /* Function Name : AT91F_DataflashProbe */
552 /* Object : */
553 /* Input Parameters : */
554 /* Return value : Dataflash status register */
555 /*---------------------------------------------------------------------------*/
556 int AT91F_DataflashProbe(int cs, AT91PS_DataflashDesc pDesc)
557 {
558 AT91F_SpiEnable(cs);
559 AT91F_DataFlashGetStatus(pDesc);
560 return ((pDesc->command[1] == 0xFF) ? 0 : pDesc->command[1] & 0x3C);
561 }
562 #endif
Fork of the u-boot for for Samsung based MINI2440 board