samsung: misc: add function for setting $dfu_alt_info

This change introduces new common function:
- set_dfu_alt_info() - put dfu system and bootloader setting
                       into $dfu_alt_info.
functions declaration:
- char *get_dfu_alt_system(void)
- char *get_dfu_alt_boot(void)
- void set_dfu_alt_info(void)
and new config:
- CONFIG_SET_DFU_ALT_INFO

This function can be used for auto setting dfu configuration on boot.
Such feature is useful for multi board support by one u-boot binary.
Each board should define two functions:
- get_dfu_alt_system()
- get_dfu_alt_boot()

Change-Id: I21cb6b5a5f535dbb10b021c92637f1f4537ecd1b
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Piotr Wilczek <p.wilczek@samsung.com>
Cc: Minkyu Kang <mk7.kang@samsung.com>
---
Changes v2:
- change config names:
  CONFIG_SET_DFU_BOOT_ALT to CONFIG_DFU_ALT_BOOTLOADER and
  CONFIG_DFU_BOOT_ALT_* to CONFIG_DFU_ALT_BOOT_*
- change function name: set_dfu_boot_alt() to set_dfu_alt_boot()
- remove superfluous ifdefs

Changes v3:
- set $dfu_alt_info at every boot
- new config: CONFIG_SET_DFU_ALT_INFO
- update commit msg

Changes v4:
- set_dfu_alt_info(): add checking the pointer returned by malloc

Changes v5:
- set_dfu_alt_info(): remove malloc and declare cache aligned buffer
- set_dfu_alt_info(): introduce CONFIG_SET_DFU_ALT_BUF_LEN

diff --git a/board/samsung/common/misc.c b/board/samsung/common/misc.c
index eedba4b43f03043226dd01744a4f4f38e4f2a343..cc4de9872fabbb52d9263d1729a62f329338e820 100644 (file)
--- a/board/samsung/common/misc.c
+++ b/board/samsung/common/misc.c
@@ -11,6 +11,7 @@
 #include <samsung/misc.h>
 #include <errno.h>
 #include <version.h>
+#include <malloc.h>
 #include <linux/sizes.h>
 #include <asm/arch/cpu.h>
 #include <asm/arch/gpio.h>
@@ -20,6 +21,46 @@
 
 DECLARE_GLOBAL_DATA_PTR;
 
+#ifdef CONFIG_SET_DFU_ALT_INFO
+void set_dfu_alt_info(void)
+{
+       size_t buf_size = CONFIG_SET_DFU_ALT_BUF_LEN;
+       ALLOC_CACHE_ALIGN_BUFFER(char, buf, buf_size);
+       char *alt_info = "Settings not found!";
+       char *status = "error!\n";
+       char *alt_setting;
+       char *alt_sep;
+       int offset = 0;
+
+       puts("DFU alt info setting: ");
+
+       alt_setting = get_dfu_alt_boot();
+       if (alt_setting) {
+               setenv("dfu_alt_boot", alt_setting);
+               offset = snprintf(buf, buf_size, "%s", alt_setting);
+       }
+
+       alt_setting = get_dfu_alt_system();
+       if (alt_setting) {
+               if (offset)
+                       alt_sep = ";";
+               else
+                       alt_sep = "";
+
+               offset += snprintf(buf + offset, buf_size - offset,
+                                   "%s%s", alt_sep, alt_setting);
+       }
+
+       if (offset) {
+               alt_info = buf;
+               status = "done\n";
+       }
+
+       setenv("dfu_alt_info", alt_info);
+       puts(status);
+}
+#endif
+
 #ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
 void set_board_info(void)
 {

diff --git a/include/samsung/misc.h b/include/samsung/misc.h
index 1809d1a3d9d6ff90984ad7a362ca419c15ee752a..d1b18425e2ef7fb1a34e9b9aef4567a87b956c8e 100644 (file)
--- a/include/samsung/misc.h
+++ b/include/samsung/misc.h
@@ -59,4 +59,10 @@ void board_low_power_mode(void);
 void draw_logo(void);
 #endif
 
+#ifdef CONFIG_SET_DFU_ALT_INFO
+char *get_dfu_alt_system(void);
+char *get_dfu_alt_boot(void);
+void set_dfu_alt_info(void);
+#endif
+
 #endif /* __SAMSUNG_MISC_COMMON_H__ */