mtd: sh_flctl: Expand the READID command to 8 bytes

The nand base code wants to read out 8 bytes in the READID command.
Reflect this in the driver code.

Signed-off-by: Bastian Hecht <hechtb@gmail.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

1 files changed, 9 insertions, 3 deletions

diff --git a/drivers/mtd/nand/sh_flctl.c b/drivers/mtd/nand/sh_flctl.c
index 9291066419e..407acb51469 100644
--- a/drivers/mtd/nand/sh_flctl.c
+++ b/drivers/mtd/nand/sh_flctl.c
@@ -320,6 +320,7 @@ static void set_cmd_regs(struct mtd_info *mtd, uint32_t cmd, uint32_t flcmcdr_va
                 break;
         case NAND_CMD_READID:
                 flcmncr_val &= ~SNAND_E;
+                flcmdcr_val |= CDSRC_E;
                 addr_len_bytes = ADRCNT_1;
                 break;
         case NAND_CMD_STATUS:
@@ -559,13 +560,18 @@ static void flctl_cmdfunc(struct mtd_info *mtd, unsigned int command,
 
         case NAND_CMD_READID:
                 set_cmd_regs(mtd, command, command);
-                set_addr(mtd, 0, 0);
 
-                flctl->read_bytes = 4;
+                /* READID is always performed using an 8-bit bus */
+                if (flctl->chip.options & NAND_BUSWIDTH_16)
+                        column <<= 1;
+                set_addr(mtd, column, 0);
+
+                flctl->read_bytes = 8;
                 writel(flctl->read_bytes, FLDTCNTR(flctl)); /* set read size */
                 empty_fifo(flctl);
                 start_translation(flctl);
-                read_datareg(flctl, 0); /* read and end */
+                read_fiforeg(flctl, flctl->read_bytes, 0);
+                wait_completion(flctl);
                 break;
 
         case NAND_CMD_ERASE1: