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mtd: nand: pxa3xx: Move the data buffer clean to prepare_start_command()
To allow future support of multiple page reading/writing, move the data buffer clean out of prepare_set_command(). This is done to prevent the data buffer from being cleaned on every command preparation, when a multiple command sequence is implemented to read/write pages larger than the FIFO size (2 KiB). 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>
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c39ff03a40
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39f83d15df
1 changed files with 16 additions and 5 deletions
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@ -605,6 +605,9 @@ static void set_command_address(struct pxa3xx_nand_info *info,
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static void prepare_start_command(struct pxa3xx_nand_info *info, int command)
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{
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struct pxa3xx_nand_host *host = info->host[info->cs];
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struct mtd_info *mtd = host->mtd;
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/* reset data and oob column point to handle data */
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info->buf_start = 0;
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info->buf_count = 0;
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@ -629,6 +632,19 @@ static void prepare_start_command(struct pxa3xx_nand_info *info, int command)
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info->ndcb2 = 0;
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break;
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}
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/*
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* If we are about to issue a read command, or about to set
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* the write address, then clean the data buffer.
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*/
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if (command == NAND_CMD_READ0 ||
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command == NAND_CMD_READOOB ||
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command == NAND_CMD_SEQIN) {
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info->buf_count = mtd->writesize + mtd->oobsize;
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memset(info->data_buff, 0xFF, info->buf_count);
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}
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}
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static int prepare_set_command(struct pxa3xx_nand_info *info, int command,
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@ -670,16 +686,11 @@ static int prepare_set_command(struct pxa3xx_nand_info *info, int command,
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info->ndcb0 |= NDCB0_DBC | (NAND_CMD_READSTART << 8);
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set_command_address(info, mtd->writesize, column, page_addr);
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info->buf_count = mtd->writesize + mtd->oobsize;
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memset(info->data_buff, 0xFF, info->buf_count);
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break;
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case NAND_CMD_SEQIN:
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set_command_address(info, mtd->writesize, column, page_addr);
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info->buf_count = mtd->writesize + mtd->oobsize;
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memset(info->data_buff, 0xFF, info->buf_count);
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break;
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case NAND_CMD_PAGEPROG:
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