ADS5121 DIU Add diu_bmp_addr env

Add support for using a bmp other than
FSL_Logo_BMP for the DIU splash screen.

Can now set the env var "diu_bmp_addr" to
the address of a BMP in flash to use instead
of the default FSL_Logo_BMP.

Signed-off-by: Martha Marx <mmarx@silicontkx.com>
Signed-off-by: John Rigby <jrigby@freescale.com>

diff --git a/board/ads5121/ads5121_diu.c b/board/ads5121/ads5121_diu.c
index 565b63da4d314fe6a203f5729f77c30ff496941d..41a135314f4c09ac1e5bed53582306dafcbbf324 100644 (file)
--- a/board/ads5121/ads5121_diu.c
+++ b/board/ads5121/ads5121_diu.c
@@ -65,16 +65,40 @@ void diu_set_pixel_clock(unsigned int pixclock)
        debug("DIU: Modified value of CLKDVDR = 0x%08x\n", *clkdvdr);
 }
 
+char *valid_bmp(char *addr)
+{
+       unsigned long h_addr;
+
+       h_addr = simple_strtoul(addr, NULL, 16);
+       if (h_addr < CONFIG_SYS_FLASH_BASE ||
+                       h_addr >= (CONFIG_SYS_FLASH_BASE + CONFIG_SYS_FLASH_SIZE - 1)) {
+               printf("bmp addr %lx is not a valid flash address\n", h_addr);
+               return 0;
+       } else if ((*(char *)(h_addr) != 'B') || (*(char *)(h_addr+1) != 'M')) {
+               printf("bmp addr is not a bmp\n");
+               return 0;
+       } else
+               return (char *)h_addr;
+}
+
 int ads5121_diu_init(void)
 {
        unsigned int pixel_format;
+       char *bmp = NULL;
+       char *bmp_env;
 
        xres = 1024;
        yres = 768;
        pixel_format = 0x88883316;
 
-       return fsl_diu_init(xres, pixel_format, 0,
-                    (unsigned char *)FSL_Logo_BMP);
+       debug("ads5121_diu_init\n");
+       bmp_env = getenv("diu_bmp_addr");
+       if (bmp_env) {
+               bmp = valid_bmp(bmp_env);
+       }
+       if (!bmp)
+               bmp = FSL_Logo_BMP;
+       return fsl_diu_init(xres, pixel_format, 0, (unsigned char *)bmp);
 }
 
 int ads5121diu_init_show_bmp(cmd_tbl_t *cmdtp,