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mtd: mxc_nand: compress ID info for send_read_id_v3

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Also compress the id in case of a v3 NAND flash controller (i.mx51, i.mx53)
and 16Bit buswidth.

Signed-off-by: Roman Schneider <schneider@at.festo.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
This commit is contained in:
Roman Schneider 2013-01-15 16:56:24 +01:00 committed by Artem Bityutskiy
parent 972e1b7b45
commit a8459f21ed
1 changed files with 11 additions and 0 deletions
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11
drivers/mtd/nand/mxc_nand.c
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@ -530,12 +530,23 @@ static void send_page_v1(struct mtd_info *mtd, unsigned int ops)
static void send_read_id_v3(struct mxc_nand_host *host)
{
struct nand_chip *this = &host->nand;
/* Read ID into main buffer */
writel(NFC_ID, NFC_V3_LAUNCH);
wait_op_done(host, true);
memcpy32_fromio(host->data_buf, host->main_area0, 16);
if (this->options & NAND_BUSWIDTH_16) {
/* compress the ID info */
host->data_buf[1] = host->data_buf[2];
host->data_buf[2] = host->data_buf[4];
host->data_buf[3] = host->data_buf[6];
host->data_buf[4] = host->data_buf[8];
host->data_buf[5] = host->data_buf[10];
}
}
/* Request the NANDFC to perform a read of the NAND device ID. */