software/liblitedram: reset ddrphy before initialization if rst CSR present (added on 7-series).

2020-08-28 17:59:24 +02:00 · 2020-08-28 17:59:24 +02:00 · bda54b1177
parent b44ca6d61a
commit bda54b1177
1 changed files with 6 additions and 0 deletions
--- a/litex/soc/software/liblitedram/sdram.c
+++ b/litex/soc/software/liblitedram/sdram.c
@ -798,6 +798,12 @@ int sdrinit(void)
 {
 	printf("Initializing DRAM @0x%08x...\n", MAIN_RAM_BASE);

+#if CSR_DDRPHY_RST_ADDR
+	ddrphy_rst_write(1);
+	cdelay(100);
+	ddrphy_rst_write(0);
+#endif
+
 #ifdef CSR_DDRCTRL_BASE
 	ddrctrl_init_done_write(0);
 	ddrctrl_init_error_write(0);