From: Roman Schneider <schneider@at.festo.com>
Date: Tue, 15 Jan 2013 15:56:24 +0000 (+0100)
Subject: mtd: mxc_nand: compress ID info for send_read_id_v3
X-Git-Tag: v3.9-rc1~18^2~35
X-Git-Url: http://git.cascardo.info/?a=commitdiff_plain;h=a8459f21ed48fc366ad49ce9828f6bbb1cfac9a9;p=cascardo%2Flinux.git

mtd: mxc_nand: compress ID info for send_read_id_v3

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>
---

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 45204e41a028..20e1241bd099 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -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. */