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mtd: nand: pxa3xx: Add helper function to set page address 

Let's simplify the code by first introducing a helper function
to set the page address, as done by the READ0, READOOB and SEQIN
commands.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
This commit is contained in:
Ezequiel Garcia 2013-11-14 18:25:31 -03:00 committed by Brian Norris
parent f0e6a32e9a
commit 86beebae3a
1 changed files with 21 additions and 15 deletions
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36
drivers/mtd/nand/pxa3xx_nand.c
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@ -583,6 +583,26 @@ static inline int is_buf_blank(uint8_t *buf, size_t len)
return 1;
}
static void set_command_address(struct pxa3xx_nand_info *info,
unsigned int page_size, uint16_t column, int page_addr)
{
/* small page addr setting */
if (page_size < PAGE_CHUNK_SIZE) {
info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
| (column & 0xFF);
info->ndcb2 = 0;
} else {
info->ndcb1 = ((page_addr & 0xFFFF) << 16)
| (column & 0xFFFF);
if (page_addr & 0xFF0000)
info->ndcb2 = (page_addr & 0xFF0000) >> 16;
else
info->ndcb2 = 0;
}
}
static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
uint16_t column, int page_addr)
{
@ -646,22 +666,8 @@ static int prepare_command_pool(struct pxa3xx_nand_info *info, int command,
info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
case NAND_CMD_SEQIN:
/* small page addr setting */
if (unlikely(mtd->writesize < PAGE_CHUNK_SIZE)) {
info->ndcb1 = ((page_addr & 0xFFFFFF) << 8)
| (column & 0xFF);
info->ndcb2 = 0;
} else {
info->ndcb1 = ((page_addr & 0xFFFF) << 16)
| (column & 0xFFFF);
if (page_addr & 0xFF0000)
info->ndcb2 = (page_addr & 0xFF0000) >> 16;
else
info->ndcb2 = 0;
}
set_command_address(info, mtd->writesize, column, page_addr);
info->buf_count = mtd->writesize + mtd->oobsize;
memset(info->data_buff, 0xFF, info->buf_count);