mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-21 06:33:41 +00:00
a4b86b292a
This allows kobs-ng to flash the SPL successfully on the 4.4 kernel used by the Gateworks IMX boards supporting NAND. The previous version of kobs-ng worked with the 3.14 kernel but will brick a board making its SPL unbootable for the 4.4 kernel. See http://trac.gateworks.com/wiki/ventana/bootloader#nandspl for instructions on updating the SPL from Linux. Signed-off-by: Tim Harvey <tharvey@gateworks.com>
46 lines
1.4 KiB
Diff
46 lines
1.4 KiB
Diff
The downstream Freescale vendor kernel has a patch that allows determining
|
|
if raw NAND flash mode is provided via a debugfs file. This is not present
|
|
in upstream kernels, but the raw access support was added in the 3.19
|
|
kernel, so we will check the kernel version if we can't find the file.
|
|
--- a/src/mtd.c
|
|
+++ b/src/mtd.c
|
|
@@ -34,6 +34,7 @@
|
|
#include <errno.h>
|
|
#include <sys/types.h>
|
|
#include <sys/ioctl.h>
|
|
+#include <sys/utsname.h>
|
|
|
|
#include "mtd.h"
|
|
#include "rand.h"
|
|
@@ -808,15 +809,27 @@ struct mtd_data *mtd_open(const struct m
|
|
md->cfg = *cfg;
|
|
|
|
/* check if use new raw access mode */
|
|
+ /* by looking for debugfs from fsl patch */
|
|
+ md->raw_mode_flag = 0;
|
|
fp = fopen("/sys/kernel/debug/gpmi-nand/raw_mode", "r");
|
|
if (!fp) {
|
|
- md->raw_mode_flag = 0;
|
|
- vp(md, "mtd: use legacy raw access mode\n");
|
|
+ /* fallback to kernel version: raw access added in 3.19 */
|
|
+ struct utsname uts;
|
|
+ if (!uname(&uts)) {
|
|
+ int major = 0, minor = 0;
|
|
+ sscanf(uts.release, "%d.%d", &major, &minor);
|
|
+ vp(md, "mtd: Linux %d.%d\n", major, minor);
|
|
+ if ((major << 8 | minor) > (3 << 8 | 18))
|
|
+ md->raw_mode_flag = 1;
|
|
+ }
|
|
} else {
|
|
fclose(fp);
|
|
md->raw_mode_flag = 1;
|
|
- vp(md, "mtd: use new bch layout raw access mode\n");
|
|
}
|
|
+ if (md->raw_mode_flag)
|
|
+ vp(md, "mtd: use new bch layout raw access mode\n");
|
|
+ else
|
|
+ vp(md, "mtd: use legacy raw access mode\n");
|
|
|
|
if (plat_config_data->m_u32UseMultiBootArea) {
|
|
|