Enable multi chip support in the NAND layer
This patch adds support for NAND_MAX_CHIPS to the MTD NAND layer.
Multi-chips devices are displayed as shown:
Device 0: 2x NAND 512MiB 3,3V 8-bit, sector size 128 KiB
Signed-off-by: Wolfgang Grandegger <wg@grandegger.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
diff --git a/common/cmd_nand.c b/common/cmd_nand.c
index 04b3200..e142d76 100644
--- a/common/cmd_nand.c
+++ b/common/cmd_nand.c
@@ -205,6 +205,17 @@
}
#endif
+static void nand_print_info(int idx)
+{
+ nand_info_t *nand = &nand_info[idx];
+ struct nand_chip *chip = nand->priv;
+ printf("Device %d: ", idx);
+ if (chip->numchips > 1)
+ printf("%dx ", chip->numchips);
+ printf("%s, sector size %u KiB\n",
+ nand->name, nand->erasesize >> 10);
+}
+
int do_nand(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i, dev, ret = 0;
@@ -233,9 +244,7 @@
putc('\n');
for (i = 0; i < CONFIG_SYS_MAX_NAND_DEVICE; i++) {
if (nand_info[i].name)
- printf("Device %d: %s, sector size %u KiB\n",
- i, nand_info[i].name,
- nand_info[i].erasesize >> 10);
+ nand_print_info(i);
}
return 0;
}
@@ -243,12 +252,12 @@
if (strcmp(cmd, "device") == 0) {
if (argc < 3) {
+ putc('\n');
if ((nand_curr_device < 0) ||
(nand_curr_device >= CONFIG_SYS_MAX_NAND_DEVICE))
- puts("\nno devices available\n");
+ puts("no devices available\n");
else
- printf("\nDevice %d: %s\n", nand_curr_device,
- nand_info[nand_curr_device].name);
+ nand_print_info(nand_curr_device);
return 0;
}
dev = (int)simple_strtoul(argv[2], NULL, 10);
diff --git a/drivers/mtd/nand/nand.c b/drivers/mtd/nand/nand.c
index 70b605f..9d83794 100644
--- a/drivers/mtd/nand/nand.c
+++ b/drivers/mtd/nand/nand.c
@@ -41,11 +41,15 @@
static void nand_init_chip(struct mtd_info *mtd, struct nand_chip *nand,
ulong base_addr)
{
+ int maxchips = CONFIG_SYS_NAND_MAX_CHIPS;
+
+ if (maxchips < 1)
+ maxchips = 1;
mtd->priv = nand;
nand->IO_ADDR_R = nand->IO_ADDR_W = (void __iomem *)base_addr;
if (board_nand_init(nand) == 0) {
- if (nand_scan(mtd, 1) == 0) {
+ if (nand_scan(mtd, maxchips) == 0) {
if (!mtd->name)
mtd->name = (char *)default_nand_name;
else
diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c
index d33fee2..e6ac859 100644
--- a/drivers/mtd/nand/nand_base.c
+++ b/drivers/mtd/nand/nand_base.c
@@ -2652,8 +2652,10 @@
type->id != chip->read_byte(mtd))
break;
}
+#ifdef DEBUG
if (i > 1)
printk(KERN_INFO "%d NAND chips detected\n", i);
+#endif
/* Store the number of chips and calc total size for mtd */
chip->numchips = i;