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-rw-r--r--doc/README.nand18
-rw-r--r--drivers/mtd/nand/omap_gpmc.c13
-rw-r--r--include/configs/am3517_crane.h1
-rw-r--r--include/configs/devkit8000.h1
-rw-r--r--include/configs/dig297.h1
-rw-r--r--include/configs/omap3_beagle.h1
-rw-r--r--include/configs/omap3_evm_common.h2
-rw-r--r--include/configs/omap3_igep00x0.h1
-rw-r--r--include/configs/omap3_logic.h1
-rw-r--r--include/configs/omap3_overo.h1
-rw-r--r--include/configs/omap3_zoom1.h1
-rw-r--r--include/configs/tam3517-common.h1
-rw-r--r--include/configs/tao3530.h1
13 files changed, 38 insertions, 5 deletions
diff --git a/doc/README.nand b/doc/README.nand
index b91f198..2bc5b39 100644
--- a/doc/README.nand
+++ b/doc/README.nand
@@ -190,6 +190,24 @@ Configuration Options:
This is used by SoC platforms which do not have built-in ELM
hardware engine required for BCH ECC correction.
+ CONFIG_SYS_NAND_BUSWIDTH_16BIT
+ Indicates that NAND device has 16-bit wide data-bus. In absence of this
+ config, bus-width of NAND device is assumed to be either 8-bit and later
+ determined by reading ONFI params.
+ Above config is useful when NAND device's bus-width information cannot
+ be determined from on-chip ONFI params, like in following scenarios:
+ - SPL boot does not support reading of ONFI parameters. This is done to
+ keep SPL code foot-print small.
+ - In current U-Boot flow using nand_init(), driver initialization
+ happens in board_nand_init() which is called before any device probe
+ (nand_scan_ident + nand_scan_tail), thus device's ONFI parameters are
+ not available while configuring controller. So a static CONFIG_NAND_xx
+ is needed to know the device's bus-width in advance.
+ Some drivers using above config are:
+ drivers/mtd/nand/mxc_nand.c
+ drivers/mtd/nand/ndfc.c
+ drivers/mtd/nand/omap_gpmc.c
+
Platform specific options
=========================
diff --git a/drivers/mtd/nand/omap_gpmc.c b/drivers/mtd/nand/omap_gpmc.c
index d2fedf9..cdfa6bc 100644
--- a/drivers/mtd/nand/omap_gpmc.c
+++ b/drivers/mtd/nand/omap_gpmc.c
@@ -782,13 +782,18 @@ int board_nand_init(struct nand_chip *nand)
nand->priv = &omap_nand_info;
nand->cmd_ctrl = omap_nand_hwcontrol;
nand->options |= NAND_NO_PADDING | NAND_CACHEPRG;
- /* If we are 16 bit dev, our gpmc config tells us that */
- if ((readl(&gpmc_cfg->cs[cs].config1) & 0x3000) == 0x1000)
- nand->options |= NAND_BUSWIDTH_16;
-
nand->chip_delay = 100;
nand->ecc.layout = &omap_ecclayout;
+ /* configure driver and controller based on NAND device bus-width */
+ gpmc_config = readl(&gpmc_cfg->cs[cs].config1);
+#if defined(CONFIG_SYS_NAND_BUSWIDTH_16BIT)
+ nand->options |= NAND_BUSWIDTH_16;
+ writel(gpmc_config | (0x1 << 12), &gpmc_cfg->cs[cs].config1);
+#else
+ nand->options &= ~NAND_BUSWIDTH_16;
+ writel(gpmc_config & ~(0x1 << 12), &gpmc_cfg->cs[cs].config1);
+#endif
/* select ECC scheme */
#if defined(CONFIG_NAND_OMAP_ECCSCHEME)
err = omap_select_ecc_scheme(nand, CONFIG_NAND_OMAP_ECCSCHEME,
diff --git a/include/configs/am3517_crane.h b/include/configs/am3517_crane.h
index 4407b45..ad4cbd8 100644
--- a/include/configs/am3517_crane.h
+++ b/include/configs/am3517_crane.h
@@ -329,6 +329,7 @@
#define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/omap-common/u-boot-spl.lds"
/* NAND boot config */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
diff --git a/include/configs/devkit8000.h b/include/configs/devkit8000.h
index 16a00eb..5308790 100644
--- a/include/configs/devkit8000.h
+++ b/include/configs/devkit8000.h
@@ -314,6 +314,7 @@
#define CONFIG_SPL_BSS_MAX_SIZE 0x80000
/* NAND boot config */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
diff --git a/include/configs/dig297.h b/include/configs/dig297.h
index af6f56b..ce205e9 100644
--- a/include/configs/dig297.h
+++ b/include/configs/dig297.h
@@ -138,6 +138,7 @@
* Board NAND Info.
*/
#define CONFIG_NAND_OMAP_GPMC
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_ADDR NAND_BASE /* physical address */
/* to access nand */
#define CONFIG_SYS_NAND_BASE NAND_BASE /* physical address */
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index 0a7df60..c023483 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -295,6 +295,7 @@
#define CONFIG_SPL_OMAP3_ID_NAND
/* NAND boot config */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
diff --git a/include/configs/omap3_evm_common.h b/include/configs/omap3_evm_common.h
index 7f3424b..ae4ce63 100644
--- a/include/configs/omap3_evm_common.h
+++ b/include/configs/omap3_evm_common.h
@@ -120,7 +120,7 @@
/* Max number of NAND devices */
#define CONFIG_SYS_MAX_NAND_DEVICE 1
-
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
/* Timeout values (in ticks) */
#define CONFIG_SYS_FLASH_ERASE_TOUT (100 * CONFIG_SYS_HZ)
#define CONFIG_SYS_FLASH_WRITE_TOUT (100 * CONFIG_SYS_HZ)
diff --git a/include/configs/omap3_igep00x0.h b/include/configs/omap3_igep00x0.h
index d56d5b0..79daabd 100644
--- a/include/configs/omap3_igep00x0.h
+++ b/include/configs/omap3_igep00x0.h
@@ -187,6 +187,7 @@
/* NAND boot config */
#ifdef CONFIG_NAND
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
diff --git a/include/configs/omap3_logic.h b/include/configs/omap3_logic.h
index 0d03c75..8dcbba3 100644
--- a/include/configs/omap3_logic.h
+++ b/include/configs/omap3_logic.h
@@ -141,6 +141,7 @@
#define CONFIG_SYS_MAX_NAND_DEVICE 1 /* Max number of */
/* NAND devices */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_JFFS2_NAND
/* nand device jffs2 lives on */
#define CONFIG_JFFS2_DEV "nand0"
diff --git a/include/configs/omap3_overo.h b/include/configs/omap3_overo.h
index 7b97be9..1a13633 100644
--- a/include/configs/omap3_overo.h
+++ b/include/configs/omap3_overo.h
@@ -206,6 +206,7 @@
#define CONFIG_SYS_CACHELINE_SIZE 64
/* NAND boot config */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
diff --git a/include/configs/omap3_zoom1.h b/include/configs/omap3_zoom1.h
index 7c5540f..3efe4cf 100644
--- a/include/configs/omap3_zoom1.h
+++ b/include/configs/omap3_zoom1.h
@@ -98,6 +98,7 @@
#define CONFIG_SYS_NAND_BASE NAND_BASE /* physical address */
/* to access nand at */
/* CS0 */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
/* Environment information */
diff --git a/include/configs/tam3517-common.h b/include/configs/tam3517-common.h
index 3522c1a..eda536b 100644
--- a/include/configs/tam3517-common.h
+++ b/include/configs/tam3517-common.h
@@ -249,6 +249,7 @@
#define CONFIG_SPL_BSS_MAX_SIZE 0x80000
/* NAND boot config */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
#define CONFIG_SYS_NAND_PAGE_COUNT 64
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
#define CONFIG_SYS_NAND_OOBSIZE 64
diff --git a/include/configs/tao3530.h b/include/configs/tao3530.h
index 9c04c23..4471935 100644
--- a/include/configs/tao3530.h
+++ b/include/configs/tao3530.h
@@ -141,6 +141,7 @@
#define CONFIG_SYS_MAX_NAND_DEVICE 1 /* Max number of NAND */
/* devices */
+#define CONFIG_SYS_NAND_BUSWIDTH_16BIT 16
/* Environment information */
#define CONFIG_BOOTDELAY 3
generated by cgit v1.1 at 2024-11-27 19:55:35 +0000