[U-Boot] [PATCH 2/7] arm: socfpga: arria5-socdk: Probe DWC2 UDC from OF instead of hard-coded data

[Marek Vasut]

This patch adds the necessary OF alias for the UDC node, which let's
the code locate the DWC2 UDC base address in OF instead of hard-coding
it into the U-Boot binary. The code is adjusted to use the address from
OF instead of the hard-coded one. Finally, the hard-coded address is
removed and USB DM support is enabled.

Signed-off-by: Marek Vasut <marex at denx.de>
Cc: Chin Liang See <clsee at altera.com>
Cc: Dinh Nguyen <dinguyen at opensource.altera.com>
Cc: Lukasz Majewski <l.majewski at majess.pl>
Cc: Lukasz Majewski <l.majewski at samsung.com>
---
 arch/arm/dts/socfpga_arria5_socdk.dts  |  1 +
 board/altera/arria5-socdk/socfpga.c    | 21 +++++++++++++++++++--
 configs/socfpga_arria5_defconfig       |  2 ++
 include/configs/socfpga_arria5_socdk.h |  3 ---
 4 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/arch/arm/dts/socfpga_arria5_socdk.dts b/arch/arm/dts/socfpga_arria5_socdk.dts
index 7d1836e..5933a40 100644
--- a/arch/arm/dts/socfpga_arria5_socdk.dts
+++ b/arch/arm/dts/socfpga_arria5_socdk.dts
@@ -25,6 +25,7 @@
 		 * to be added to the gmac1 device tree blob.
 		 */
 		ethernet0 = &gmac1;
+		udc0 = &usb1;
 	};
 
 	regulator_3_3v: 3-3-v-regulator {
diff --git a/board/altera/arria5-socdk/socfpga.c b/board/altera/arria5-socdk/socfpga.c
index ccb1b4b..449f3b5 100644
--- a/board/altera/arria5-socdk/socfpga.c
+++ b/board/altera/arria5-socdk/socfpga.c
@@ -5,12 +5,12 @@
  */
 
 #include <common.h>
+#include <errno.h>
 #include <asm/arch/reset_manager.h>
 #include <asm/io.h>
 
 #include <usb.h>
 #include <usb/dwc2_udc.h>
-#include <usb_mass_storage.h>
 
 DECLARE_GLOBAL_DATA_PTR;
 
@@ -29,12 +29,29 @@ int board_init(void)
 
 #ifdef CONFIG_USB_GADGET
 struct dwc2_plat_otg_data socfpga_otg_data = {
-	.regs_otg	= CONFIG_USB_DWC2_REG_ADDR,
 	.usb_gusbcfg	= 0x1417,
 };
 
 int board_usb_init(int index, enum usb_init_type init)
 {
+	int node[2], count;
+	fdt_addr_t addr;
+
+	count = fdtdec_find_aliases_for_id(gd->fdt_blob, "udc",
+					   COMPAT_ALTERA_SOCFPGA_DWC2USB,
+					   node, 2);
+	if (count <= 0)	/* No controller found. */
+		return 0;
+
+	addr = fdtdec_get_addr(gd->fdt_blob, node[0], "reg");
+	if (addr == FDT_ADDR_T_NONE) {
+		printf("UDC Controller has no 'reg' property!\n");
+		return -EINVAL;
+	}
+
+	/* Patch the address from OF into the controller pdata. */
+	socfpga_otg_data.regs_otg = addr;
+
 	return dwc2_udc_probe(&socfpga_otg_data);
 }
 
diff --git a/configs/socfpga_arria5_defconfig b/configs/socfpga_arria5_defconfig
index f59bc00..10eb91d 100644
--- a/configs/socfpga_arria5_defconfig
+++ b/configs/socfpga_arria5_defconfig
@@ -21,3 +21,5 @@ CONFIG_SYS_NS16550=y
 CONFIG_CADENCE_QSPI=y
 CONFIG_DESIGNWARE_SPI=y
 CONFIG_DM_MMC=y
+CONFIG_USB=y
+CONFIG_DM_USB=y
diff --git a/include/configs/socfpga_arria5_socdk.h b/include/configs/socfpga_arria5_socdk.h
index 465df54..d2411e6 100644
--- a/include/configs/socfpga_arria5_socdk.h
+++ b/include/configs/socfpga_arria5_socdk.h
@@ -56,9 +56,6 @@
 #define CONFIG_ENV_OFFSET		512	/* just after the MBR */
 
 /* USB */
-#ifdef CONFIG_CMD_USB
-#define CONFIG_USB_DWC2_REG_ADDR	SOCFPGA_USB1_ADDRESS
-#endif
 #define CONFIG_G_DNL_MANUFACTURER      "Altera"
 
 /* Extra Environment */
-- 
2.1.4