xloader: Panda - kill OTG and reset PHY in case ROM started them

It'd be better if we didn't let the OS or next bootloader
see that the ROM set things up differently than usual.

Signed-off-by: Andy Green <andy.green@linaro.org>
Signed-off-by: Anand Gadiyar <gadiyar@ti.com>

diff --git a/board/omap4430panda/omap4430panda.c b/board/omap4430panda/omap4430panda.c
index ce45e6d..4cedd8f 100644 (file)
--- a/board/omap4430panda/omap4430panda.c
+++ b/board/omap4430panda/omap4430panda.c
@@ -527,6 +527,26 @@ static void ddr_init(void)
  *****************************************/
 int board_init(void)
 {
+       unsigned int v;
+
+       /*
+        * If the ROM has started the OTG stuff, stop it and
+        * make it look as if uninitialized for Linux or U-Boot
+        */
+
+       /* hold OTG phy in reset */
+
+       v = __raw_readl(OMAP44XX_GPIO_BASE2 + 0x134);
+       __raw_writel((v & ~(0x01 << 30)), OMAP44XX_GPIO_BASE2 + 0x134);
+
+       v = __raw_readl(OMAP44XX_GPIO_BASE2 + 0x13c);
+       __raw_writel((v & ~(0x01 << 30)), OMAP44XX_GPIO_BASE2 + 0x13c);
+
+       /* kill USB PLL */
+
+       v = __raw_readl(0x4a008100 + 0x80);
+       __raw_writel((v & ~(7 << 0)) | 1, 0x4a008100 + 0x80);
+
        return 0;
 }