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authorDmitry Lifshitz <lifshitz@compulab.co.il>2014-04-27 13:18:46 +0300
committerTom Rini <trini@ti.com>2014-05-23 19:40:39 -0400
commita9375f3328135d651d7500df3e4c43432e5db133 (patch)
treefd9cf808d41d9ce69ce6fd086f6239be40e31a58
parent076446f106d0732f79456485be275ad2109306f4 (diff)
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cm-t54: add EEPROM support and MAC address handling
cm-t54 Eth MAC address is stored in onboard EEPROM. Add EEPROM support and setup stored Eth MAC address. If EEPROM does not contain a valid MAC, then generate it from the processor ID code (reference code is taken from OMAP5 uEvm board file). Modify Device Tree blob MAC address field with retrieved data. Signed-off-by: Dmitry Lifshitz <lifshitz@compulab.co.il> Acked-by: Igor Grinberg <grinberg@compulab.co.il>
-rw-r--r--board/compulab/cm_t54/cm_t54.c63
-rw-r--r--include/configs/cm_t54.h9
2 files changed, 72 insertions, 0 deletions
diff --git a/board/compulab/cm_t54/cm_t54.c b/board/compulab/cm_t54/cm_t54.c
index e0df47e..6b18b93 100644
--- a/board/compulab/cm_t54/cm_t54.c
+++ b/board/compulab/cm_t54/cm_t54.c
@@ -9,6 +9,7 @@
*/
#include <common.h>
+#include <fdt_support.h>
#include <usb.h>
#include <mmc.h>
#include <palmas.h>
@@ -20,6 +21,8 @@
#include <asm/arch/ehci.h>
#include <asm/ehci-omap.h>
+#include "../common/eeprom.h"
+
#define DIE_ID_REG_BASE (OMAP54XX_L4_CORE_BASE + 0x2000)
#define DIE_ID_REG_OFFSET 0x200
@@ -99,6 +102,66 @@ int board_mmc_init(bd_t *bis)
}
#endif
+#ifdef CONFIG_USB_HOST_ETHER
+
+void ft_board_setup(void *blob, bd_t *bd)
+{
+ uint8_t enetaddr[6];
+
+ /* MAC addr */
+ if (eth_getenv_enetaddr("usbethaddr", enetaddr)) {
+ fdt_find_and_setprop(blob, "/smsc95xx@0", "mac-address",
+ enetaddr, 6, 1);
+ }
+}
+
+static void generate_mac_addr(uint8_t *enetaddr)
+{
+ int reg;
+
+ reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
+
+ /*
+ * create a fake MAC address from the processor ID code.
+ * first byte is 0x02 to signify locally administered.
+ */
+ enetaddr[0] = 0x02;
+ enetaddr[1] = readl(reg + 0x10) & 0xff;
+ enetaddr[2] = readl(reg + 0xC) & 0xff;
+ enetaddr[3] = readl(reg + 0x8) & 0xff;
+ enetaddr[4] = readl(reg) & 0xff;
+ enetaddr[5] = (readl(reg) >> 8) & 0xff;
+}
+
+/*
+ * Routine: handle_mac_address
+ * Description: prepare MAC address for on-board Ethernet.
+ */
+static int handle_mac_address(void)
+{
+ uint8_t enetaddr[6];
+ int ret;
+
+ ret = eth_getenv_enetaddr("usbethaddr", enetaddr);
+ if (ret)
+ return 0;
+
+ ret = cl_eeprom_read_mac_addr(enetaddr);
+ if (!ret || !is_valid_ether_addr(enetaddr))
+ generate_mac_addr(enetaddr);
+
+ if (!is_valid_ether_addr(enetaddr))
+ return -1;
+
+ return eth_setenv_enetaddr("usbethaddr", enetaddr);
+}
+
+int board_eth_init(bd_t *bis)
+{
+ return handle_mac_address();
+}
+#endif
+
#ifdef CONFIG_USB_EHCI
static struct omap_usbhs_board_data usbhs_bdata = {
.port_mode[0] = OMAP_USBHS_PORT_MODE_UNUSED,
diff --git a/include/configs/cm_t54.h b/include/configs/cm_t54.h
index 4dcac40..5e805c4 100644
--- a/include/configs/cm_t54.h
+++ b/include/configs/cm_t54.h
@@ -19,6 +19,15 @@
#undef CONFIG_MISC_INIT_R
#undef CONFIG_SPL_OS_BOOT
+/* Device Tree defines */
+#define CONFIG_OF_LIBFDT
+#define CONFIG_OF_BOARD_SETUP
+
+/* EEPROM related defines */
+#define CONFIG_SYS_I2C_OMAP34XX
+#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
+
/* Enable SD/MMC CD and WP GPIOs */
#define OMAP_HSMMC_USE_GPIO