ppc4xx: Fix building for PLU405 boards

[platform/kernel/u-boot.git] / board / esd / plu405 / plu405.c

diff --git a/board/esd/plu405/plu405.c b/board/esd/plu405/plu405.c
index e385a78..0f7fa69 100644 (file)
--- a/board/esd/plu405/plu405.c
+++ b/board/esd/plu405/plu405.c
@@ -46,6 +46,34 @@ const unsigned char fpgadata[] =
  */
 #include "../common/fpga.c"
 
+/*
+ * generate a short spike on the CAN tx line
+ * to bring the couplers in sync
+ */
+void init_coupler(u32 addr)
+{
+       struct sja1000_basic_s *ctrl = (struct sja1000_basic_s *)addr;
+
+       /* reset */
+       out_8(&ctrl->cr, CR_RR);
+
+       /* dominant */
+       out_8(&ctrl->btr0, 0x00); /* btr setup is required */
+       out_8(&ctrl->btr1, 0x14); /* we use 1Mbit/s */
+       out_8(&ctrl->oc, OC_TP1 | OC_TN1 | OC_POL1 |
+             OC_TP0 | OC_TN0 | OC_POL0 | OC_MODE1);
+       out_8(&ctrl->cr, 0x00);
+
+       /* delay */
+       in_8(&ctrl->cr);
+       in_8(&ctrl->cr);
+       in_8(&ctrl->cr);
+       in_8(&ctrl->cr);
+
+       /* reset */
+       out_8(&ctrl->cr, CR_RR);
+}
+
 int board_early_init_f(void)
 {
        /*