board: sifive: unmatched: reset USB hub, PCIe-USB bridge, and ULPI device in SPL

Ensure USB hub, PCIe-USB bridge, and ULPI device to be reset
even if the rebooting is without power-cycling.

Signed-off-by: Vincent Chen <vincent.chen@sifive.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>

diff --git a/board/sifive/unmatched/spl.c b/board/sifive/unmatched/spl.c
index b598f9f..d566327 100644 (file)
--- a/board/sifive/unmatched/spl.c
+++ b/board/sifive/unmatched/spl.c
@@ -16,6 +16,9 @@
 #include <asm/arch/gpio.h>
 #include <asm/arch/spl.h>
 
+#define UBRDG_RESET    SIFIVE_GENERIC_GPIO_NR(0, 7)
+#define ULPI_RESET     SIFIVE_GENERIC_GPIO_NR(0, 9)
+#define UHUB_RESET     SIFIVE_GENERIC_GPIO_NR(0, 11)
 #define GEM_PHY_RESET  SIFIVE_GENERIC_GPIO_NR(0, 12)
 
 #define MODE_SELECT_REG                0x1000
@@ -61,6 +64,21 @@ static inline int spl_gemgxl_init(void)
        return ret;
 }
 
+static inline int spl_usb_pcie_bridge_init(void)
+{
+       return spl_reset_device_by_gpio("usb_pcie_bridge_reset", UBRDG_RESET, 3000);
+}
+
+static inline int spl_usb_hub_init(void)
+{
+       return spl_reset_device_by_gpio("usb_hub_reset", UHUB_RESET, 100);
+}
+
+static inline int spl_ulpi_init(void)
+{
+       return spl_reset_device_by_gpio("ulpi_reset", ULPI_RESET, 1);
+}
+
 int spl_board_init_f(void)
 {
        int ret;
@@ -77,6 +95,24 @@ int spl_board_init_f(void)
                goto end;
        }
 
+       ret = spl_usb_pcie_bridge_init();
+       if (ret) {
+               debug("USB Bridge (ASM1042A) init failed: %d\n", ret);
+               goto end;
+       }
+
+       ret = spl_usb_hub_init();
+       if (ret) {
+               debug("USB Hub (ASM1074) init failed: %d\n", ret);
+               goto end;
+       }
+
+       ret = spl_ulpi_init();
+       if (ret) {
+               debug("USB 2.0 PHY (USB3320C) init failed: %d\n", ret);
+               goto end;
+       }
+
 end:
        return ret;
 }