[U-Boot] [PATCH v2 3/3] am335x_evm: enable support for booting via USB

[Tom Rini]

From: Ilya Yanok <ilya.yanok at cogentembedded.com>

This adds necessary config options and a new build target,
am335x_evm_usbspl, to enable usb booting and fixes board_eth_init()
function to take into account that we may have USB ether support in SPL
now.  This uses the same MAC for both cpsw and USB, in order to match
ROM behavior.

The usbspl build target does not contain UART SPL, CPSW SPL or extra
environment settings, so that we may fit within our binary size
constraint.

--
v2: Set usb eth MAC to E-Fuse first MAC to match ROM, add
am335x_evm_usbspl build target. - trini

Signed-off-by: Ilya Yanok <ilya.yanok at cogentembedded.com>
Signed-off-by: Tom Rini <trini at ti.com>
---
 board/ti/am335x/board.c      |   38 +++++++++++++++++++++-----------------
 boards.cfg                   |    1 +
 include/configs/am335x_evm.h |   14 ++++++++++++++
 3 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/board/ti/am335x/board.c b/board/ti/am335x/board.c
index ed4229e..bced870 100644
--- a/board/ti/am335x/board.c
+++ b/board/ti/am335x/board.c
@@ -343,7 +343,8 @@ int board_late_init(void)
 }
 #endif
 
-#ifdef CONFIG_DRIVER_TI_CPSW
+#if (defined(CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)) || \
+	(defined(CONFIG_SPL_ETH_SUPPORT) && defined(CONFIG_SPL_BUILD))
 static void cpsw_control(int enabled)
 {
 	/* VTP can be added here */
@@ -388,26 +389,26 @@ static struct cpsw_platform_data cpsw_data = {
 int board_eth_init(bd_t *bis)
 {
 	int rv, n = 0;
-#ifdef CONFIG_DRIVER_TI_CPSW
 	uint8_t mac_addr[6];
 	uint32_t mac_hi, mac_lo;
 
-	if (!eth_getenv_enetaddr("ethaddr", mac_addr)) {
-		debug("<ethaddr> not set. Reading from E-fuse\n");
-		/* try reading mac address from efuse */
-		mac_lo = readl(&cdev->macid0l);
-		mac_hi = readl(&cdev->macid0h);
-		mac_addr[0] = mac_hi & 0xFF;
-		mac_addr[1] = (mac_hi & 0xFF00) >> 8;
-		mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
-		mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
-		mac_addr[4] = mac_lo & 0xFF;
-		mac_addr[5] = (mac_lo & 0xFF00) >> 8;
+	/* try reading mac address from efuse */
+	mac_lo = readl(&cdev->macid0l);
+	mac_hi = readl(&cdev->macid0h);
+	mac_addr[0] = mac_hi & 0xFF;
+	mac_addr[1] = (mac_hi & 0xFF00) >> 8;
+	mac_addr[2] = (mac_hi & 0xFF0000) >> 16;
+	mac_addr[3] = (mac_hi & 0xFF000000) >> 24;
+	mac_addr[4] = mac_lo & 0xFF;
+	mac_addr[5] = (mac_lo & 0xFF00) >> 8;
+
+#if (defined(CONFIG_DRIVER_TI_CPSW) && !defined(CONFIG_SPL_BUILD)) || \
+	(defined(CONFIG_SPL_ETH_SUPPORT) && defined(CONFIG_SPL_BUILD))
+	if (!getenv("ethaddr")) {
+		printf("<ethaddr> not set. Validating first E-fuse MAC\n");
 
 		if (is_valid_ether_addr(mac_addr))
 			eth_setenv_enetaddr("ethaddr", mac_addr);
-		else
-			goto try_usbether;
 	}
 
 	if (board_is_bone() || board_is_bone_lt() || board_is_idk()) {
@@ -426,8 +427,11 @@ int board_eth_init(bd_t *bis)
 	else
 		n += rv;
 #endif
-try_usbether:
-#if defined(CONFIG_USB_ETHER) && !defined(CONFIG_SPL_BUILD)
+#if defined(CONFIG_USB_ETHER) && \
+	(!defined(CONFIG_SPL_BUILD) || defined(CONFIG_SPL_USBETH_SUPPORT))
+	if (is_valid_ether_addr(mac_addr))
+		eth_setenv_enetaddr("usbnet_devaddr", mac_addr);
+
 	rv = usb_eth_initialize(bis);
 	if (rv < 0)
 		printf("Error %d registering USB_ETHER\n", rv);
diff --git a/boards.cfg b/boards.cfg
index 98f7a14..a50a8a4 100644
--- a/boards.cfg
+++ b/boards.cfg
@@ -236,6 +236,7 @@ am335x_evm_uart2             arm         armv7       am335x              ti
 am335x_evm_uart3             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL4,CONS_INDEX=4
 am335x_evm_uart4             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL5,CONS_INDEX=5
 am335x_evm_uart5             arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL6,CONS_INDEX=6
+am335x_evm_usbspl            arm         armv7       am335x              ti             am33xx      am335x_evm:SERIAL1,CONS_INDEX=1,SPL_USBETH_SUPPORT
 highbank                     arm         armv7       highbank            -              highbank
 mx51_efikamx                 arm         armv7       mx51_efikamx        genesi         mx5		mx51_efikamx:MACH_TYPE=MACH_TYPE_MX51_EFIKAMX,IMX_CONFIG=board/genesi/mx51_efikamx/imximage_mx.cfg
 mx51_efikasb                 arm         armv7       mx51_efikamx        genesi         mx5		mx51_efikamx:MACH_TYPE=MACH_TYPE_MX51_EFIKASB,IMX_CONFIG=board/genesi/mx51_efikamx/imximage_sb.cfg
diff --git a/include/configs/am335x_evm.h b/include/configs/am335x_evm.h
index 72459d8..9585c59 100644
--- a/include/configs/am335x_evm.h
+++ b/include/configs/am335x_evm.h
@@ -238,6 +238,7 @@
 #define CONFIG_SPL_SPI_CS		0
 #define CONFIG_SYS_SPI_U_BOOT_OFFS	0x20000
 #define CONFIG_SYS_SPI_U_BOOT_SIZE	0x40000
+#define CONFIG_SPL_MUSB_NEW_SUPPORT
 #define CONFIG_SPL_LDSCRIPT		"$(CPUDIR)/omap-common/u-boot-spl.lds"
 
 #define CONFIG_SPL_BOARD_INIT
@@ -311,8 +312,21 @@
 #ifdef CONFIG_MUSB_GADGET
 #define CONFIG_USB_ETHER
 #define CONFIG_USB_ETH_RNDIS
+#define CONFIG_USBNET_HOST_ADDR	"de:ad:be:af:00:00"
 #endif /* CONFIG_MUSB_GADGET */
 
+#if defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_USBETH_SUPPORT)
+/* disable host part of MUSB in SPL */
+#undef CONFIG_MUSB_HOST
+/*
+ * Disable UART, CPSW ethernet support and extra environment settings so we
+ * will fit within 101KiB.
+ */
+#undef CONFIG_SPL_ETH_SUPPORT
+#undef CONFIG_SPL_YMODEM_SUPPORT
+#undef CONFIG_EXTRA_ENV_SETTINGS
+#endif
+
 /* Unsupported features */
 #undef CONFIG_USE_IRQ
 
-- 
1.7.9.5