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-rw-r--r--drivers/mtd/nand/atmel_nand.c58
1 files changed, 6 insertions, 52 deletions
diff --git a/drivers/mtd/nand/atmel_nand.c b/drivers/mtd/nand/atmel_nand.c
index 3387e0d5076b..c98c1570a40b 100644
--- a/drivers/mtd/nand/atmel_nand.c
+++ b/drivers/mtd/nand/atmel_nand.c
@@ -174,48 +174,6 @@ static void atmel_write_buf16(struct mtd_info *mtd, const u8 *buf, int len)
174} 174}
175 175
176/* 176/*
177 * write oob for small pages
178 */
179static int atmel_nand_write_oob_512(struct mtd_info *mtd,
180 struct nand_chip *chip, int page)
181{
182 int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad;
183 int eccsize = chip->ecc.size, length = mtd->oobsize;
184 int len, pos, status = 0;
185 const uint8_t *bufpoi = chip->oob_poi;
186
187 pos = eccsize + chunk;
188
189 chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page);
190 len = min_t(int, length, chunk);
191 chip->write_buf(mtd, bufpoi, len);
192 bufpoi += len;
193 length -= len;
194 if (length > 0)
195 chip->write_buf(mtd, bufpoi, length);
196
197 chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
198 status = chip->waitfunc(mtd, chip);
199
200 return status & NAND_STATUS_FAIL ? -EIO : 0;
201
202}
203
204/*
205 * read oob for small pages
206 */
207static int atmel_nand_read_oob_512(struct mtd_info *mtd,
208 struct nand_chip *chip, int page, int sndcmd)
209{
210 if (sndcmd) {
211 chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
212 sndcmd = 0;
213 }
214 chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
215 return sndcmd;
216}
217
218/*
219 * Calculate HW ECC 177 * Calculate HW ECC
220 * 178 *
221 * function called after a write 179 * function called after a write
@@ -235,14 +193,14 @@ static int atmel_nand_calculate(struct mtd_info *mtd,
235 /* get the first 2 ECC bytes */ 193 /* get the first 2 ECC bytes */
236 ecc_value = ecc_readl(host->ecc, PR); 194 ecc_value = ecc_readl(host->ecc, PR);
237 195
238 ecc_code[eccpos[0]] = ecc_value & 0xFF; 196 ecc_code[0] = ecc_value & 0xFF;
239 ecc_code[eccpos[1]] = (ecc_value >> 8) & 0xFF; 197 ecc_code[1] = (ecc_value >> 8) & 0xFF;
240 198
241 /* get the last 2 ECC bytes */ 199 /* get the last 2 ECC bytes */
242 ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY; 200 ecc_value = ecc_readl(host->ecc, NPR) & ATMEL_ECC_NPARITY;
243 201
244 ecc_code[eccpos[2]] = ecc_value & 0xFF; 202 ecc_code[2] = ecc_value & 0xFF;
245 ecc_code[eccpos[3]] = (ecc_value >> 8) & 0xFF; 203 ecc_code[3] = (ecc_value >> 8) & 0xFF;
246 204
247 return 0; 205 return 0;
248} 206}
@@ -476,14 +434,12 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
476 res = -EIO; 434 res = -EIO;
477 goto err_ecc_ioremap; 435 goto err_ecc_ioremap;
478 } 436 }
479 nand_chip->ecc.mode = NAND_ECC_HW_SYNDROME; 437 nand_chip->ecc.mode = NAND_ECC_HW;
480 nand_chip->ecc.calculate = atmel_nand_calculate; 438 nand_chip->ecc.calculate = atmel_nand_calculate;
481 nand_chip->ecc.correct = atmel_nand_correct; 439 nand_chip->ecc.correct = atmel_nand_correct;
482 nand_chip->ecc.hwctl = atmel_nand_hwctl; 440 nand_chip->ecc.hwctl = atmel_nand_hwctl;
483 nand_chip->ecc.read_page = atmel_nand_read_page; 441 nand_chip->ecc.read_page = atmel_nand_read_page;
484 nand_chip->ecc.bytes = 4; 442 nand_chip->ecc.bytes = 4;
485 nand_chip->ecc.prepad = 0;
486 nand_chip->ecc.postpad = 0;
487 } 443 }
488 444
489 nand_chip->chip_delay = 20; /* 20us command delay time */ 445 nand_chip->chip_delay = 20; /* 20us command delay time */
@@ -514,7 +470,7 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
514 goto err_scan_ident; 470 goto err_scan_ident;
515 } 471 }
516 472
517 if (nand_chip->ecc.mode == NAND_ECC_HW_SYNDROME) { 473 if (nand_chip->ecc.mode == NAND_ECC_HW) {
518 /* ECC is calculated for the whole page (1 step) */ 474 /* ECC is calculated for the whole page (1 step) */
519 nand_chip->ecc.size = mtd->writesize; 475 nand_chip->ecc.size = mtd->writesize;
520 476
@@ -522,8 +478,6 @@ static int __init atmel_nand_probe(struct platform_device *pdev)
522 switch (mtd->writesize) { 478 switch (mtd->writesize) {
523 case 512: 479 case 512:
524 nand_chip->ecc.layout = &atmel_oobinfo_small; 480 nand_chip->ecc.layout = &atmel_oobinfo_small;
525 nand_chip->ecc.read_oob = atmel_nand_read_oob_512;
526 nand_chip->ecc.write_oob = atmel_nand_write_oob_512;
527 ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528); 481 ecc_writel(host->ecc, MR, ATMEL_ECC_PAGESIZE_528);
528 break; 482 break;
529 case 1024: 483 case 1024: