openwrt/target/linux/sunxi/patches-4.1/121-mtd-print-full-chipid.patch

From fb177d5b534f263735dc6955703e3c711b950f35 Mon Sep 17 00:00:00 2001
From: Michal Suchanek <hramrach@gmail.com>
Date: Thu, 1 Jan 2015 00:57:46 +0100
Subject: [PATCH] mtd: nand: print full chip ID

Full chip ID is printed so user has data to paste from syslog in case
of chip misidentification.

Signed-off-by: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
---
 drivers/mtd/nand/nand_base.c | 23 ++++++++++++++++++-----
 1 file changed, 18 insertions(+), 5 deletions(-)

--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -4247,7 +4247,7 @@ static inline bool is_full_id_nand(struc
 }
 
 static bool find_full_id_nand(struct mtd_info *mtd, struct nand_chip *chip,
-		   struct nand_flash_dev *type, u8 *id_data, int *busw)
+		   struct nand_flash_dev *type, const u8 *id_data, int *busw)
 {
 	if (!strncmp(type->id, id_data, type->id_len)) {
 		mtd->writesize = type->pagesize;
@@ -4273,6 +4273,21 @@ static bool find_full_id_nand(struct mtd
 }
 
 /*
+ * Print full detail of chip ID read from chip.
+ */
+static void print_nand_chip_info(int maf_id, int dev_id, u8 id_data[8])
+{
+	u8 delim[8] = { [0 ... 7] = ',' };
+	pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n", maf_id, dev_id);
+	delim[7] = ' ';
+	delim[nand_id_len(id_data, 8) - 1] = ';';
+	/* This sucks. Kernel seems to insert newline after every other printk so format in one go. */
+	pr_info("chip id data: 0x%02x%c 0x%02x%c 0x%02x%c 0x%02x%c 0x%02x%c 0x%02x%c 0x%02x%c 0x%02x%c\n",
+		id_data[0], delim[0], id_data[1], delim[1], id_data[2], delim[2], id_data[3], delim[3],
+		id_data[4], delim[4], id_data[5], delim[5], id_data[6], delim[6], id_data[7], delim[7]);
+}
+
+/*
  * Get the flash and manufacturer id and lookup if the type is supported.
  */
 static struct nand_flash_dev *nand_get_flash_type(struct mtd_info *mtd,
@@ -4385,8 +4400,7 @@ ident_done:
 		 * Check, if buswidth is correct. Hardware drivers should set
 		 * chip correct!
 		 */
-		pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
-			*maf_id, *dev_id);
+		print_nand_chip_info(*maf_id, *dev_id, id_data);
 		pr_info("%s %s\n", nand_manuf_ids[maf_idx].name, mtd->name);
 		pr_warn("bus width %d instead %d bit\n",
 			   (chip->options & NAND_BUSWIDTH_16) ? 16 : 8,
@@ -4424,8 +4438,7 @@ ident_done:
 			return ERR_PTR(err);
 	}
 
-	pr_info("device found, Manufacturer ID: 0x%02x, Chip ID: 0x%02x\n",
-		*maf_id, *dev_id);
+	print_nand_chip_info(*maf_id, *dev_id, id_data);
 
 	if (chip->onfi_version)
 		pr_info("%s %s\n", nand_manuf_ids[maf_idx].name,