[U-Boot] [PATCH v3 1/9] OMAP3: tam3517: add function to read MAC from EEPROM

Stefano Babic
2012-08-29T11:21:59Z

The manufacturer delivers the TAM3517 SOM with 4 MAC address.
They are stored on the EEPROM of the SOM. The patch adds a
function to get their values and set the ethaddr variables.

Signed-off-by: Stefano Babic <sbabic@denx.de>
---
Changes in v2:
- Set dispc_config before checking for framebuffer
- Use a common macro to set up the horizontal and vertical timing (Heiko Schocker)
to not break beagleboard (Jeroen Hofstee)

Changes in v3:
- Add further macros to define the single fields (Jeroen Hofstee)

include/configs/tam3517-common.h | 66 ++++++++++++++++++++++++++++++++++++++
1 file changed, 66 insertions(+)

diff --git a/include/configs/tam3517-common.h b/include/configs/tam3517-common.h
index 24f6f7e..51503da 100644
--- a/include/configs/tam3517-common.h
+++ b/include/configs/tam3517-common.h
@@ -125,6 +125,7 @@
#define CONFIG_CMD_NAND /* NAND support */
#define CONFIG_CMD_PING
#define CONFIG_CMD_USB
+#define CONFIG_CMD_EEPROM

#undef CONFIG_CMD_FLASH /* only NAND on the SOM */
#undef CONFIG_CMD_IMLS
@@ -135,6 +136,9 @@
#define CONFIG_SYS_I2C_SLAVE 1
#define CONFIG_SYS_I2C_BUS 0
#define CONFIG_SYS_I2C_BUS_SELECT 1
+#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 /* base address */
+#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1 /* bytes of address */
+#define CONFIG_SYS_I2C_EEPROM_ADDR_OVERFLOW 0x07
#define CONFIG_DRIVER_OMAP34XX_I2C

@@ -354,4 +358,66 @@
"fi;" \
"else echo U-Boot not downloaded..exiting;fi\0" \

+
+/*
+ * this is common code for all TAM3517 boards.
+ * MAC address is stored from manufacturer in
+ * I2C EEPROM
+ */
+#if !(defined(__KERNEL_STRICT_NAMES) || defined(__ASSEMBLY__))
+
+/*
+ * The I2C EEPROM on the TAM3517 contains
+ * mac address and production data
+ */
+struct tam3517_module_info {
+ char customer[48];
+ char product[48];
+
+ /*
+ * bit 0~47 : sequence number
+ * bit 48~55 : week of year, from 0.
+ * bit 56~63 : year
+ */
+ unsigned long long sequence_number;
+
+ /*
+ * bit 0~7 : revision fixed
+ * bit 8~15 : revision major
+ * bit 16~31 : TNxxx
+ */
+ unsigned int revision;
+ unsigned char eth_addr[4][8];
+ unsigned char _rev[100];
+};
+
+#define TAM3517_READ_MAC_FROM_EEPROM \
+do { \
+ struct tam3517_module_info info;\
+ char buf[80], ethname[20]; \
+ int i; \
+ i2c_init(CONFIG_SYS_I2C_SPEED, CONFIG_SYS_I2C_SLAVE); \
+ if (eeprom_read(CONFIG_SYS_I2C_EEPROM_ADDR, 0, \
+ (void *)&info, sizeof(info))) \
+ break; \
+ memset(buf, 0, sizeof(buf)); \
+ for (i = 0 ; i < ARRAY_SIZE(info.eth_addr); i++) { \
+ sprintf(buf, "%02X:%02X:%02X:%02X:%02X:%02X", \
+ info.eth_addr[i][5], \
+ info.eth_addr[i][4], \
+ info.eth_addr[i][3], \
+ info.eth_addr[i][2], \
+ info.eth_addr[i][1], \
+ info.eth_addr[i][0]); \
+ \
+ if (i) \
+ sprintf(ethname, "eth%daddr", i); \
+ else \
+ sprintf(ethname, "ethaddr"); \
+ printf("Setting %s from EEPROM with %s\n", ethname, buf);\
+ setenv(ethname, buf); \
+ } \
+} while (0)
+#endif
+
#endif /* __TAM3517_H */
--
1.7.9.5