mtd: mxc-nand: Implement support for PARAM command

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Gitweb:     http://git.infradead.org/?p=mtd-2.6.git;a=commit;h=3d6e81c0c9827c86fd3fe4bcbc44155b1401f80e
Commit:     3d6e81c0c9827c86fd3fe4bcbc44155b1401f80e
Parent:     c4ca3997ef954bcba009cce0e325f3155bdde01a
Author:     Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
AuthorDate: Tue Feb 10 19:59:59 2015 +0100
Committer:  Brian Norris <computersforpeace at gmail.com>
CommitDate: Wed Mar 11 15:20:41 2015 -0700

    mtd: mxc-nand: Implement support for PARAM command
    
    The mxc-nand driver never supported the PARAM command to read out the
    ONFI parameter page and so always relied on probing my manufacturer and
    device id (as provided by the READID command).
    
    This patch implements reading out the first parameter page copy at least
    which should be good enough in practise.
    
    This makes the boot log change from
    
    	nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xb1
    	nand: Micron NAND 128MiB 1,8V 16-bit
    
    to
    	nand: device found, Manufacturer ID: 0x2c, Chip ID: 0xb1
    	nand: Micron MT29F1G16ABBDAH4
    
    on my machine.
    
    Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>
    Signed-off-by: Brian Norris <computersforpeace at gmail.com>
---
 drivers/mtd/nand/mxc_nand.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/mtd/nand/mxc_nand.c b/drivers/mtd/nand/mxc_nand.c
index 0afe590..0083b4e 100644
--- a/drivers/mtd/nand/mxc_nand.c
+++ b/drivers/mtd/nand/mxc_nand.c
@@ -1153,6 +1153,13 @@ static void mxc_nand_command(struct mtd_info *mtd, unsigned command,
 		mxc_do_addr_cycle(mtd, column, page_addr);
 
 		break;
+	case NAND_CMD_PARAM:
+		host->devtype_data->send_cmd(host, command, false);
+		mxc_do_addr_cycle(mtd, column, page_addr);
+		host->devtype_data->send_page(mtd, NFC_OUTPUT);
+		memcpy32_fromio(host->data_buf, host->main_area0, 512);
+		host->buf_start = 0;
+		break;
 	}
 }