[U-Boot] [PATCH v3 07/11] SPEAr : Support for HW macid read/write from i2c memory
Vipin KUMAR
vipin.kumar at st.com
Fri Jan 8 14:49:03 CET 2010
Signed-off-by: Vipin <vipin.kumar at st.com>
---
board/spear/common/spr_misc.c | 70 ++++++++++++++++++++++++++++++++++++++++-
1 files changed, 69 insertions(+), 1 deletions(-)
diff --git a/board/spear/common/spr_misc.c b/board/spear/common/spr_misc.c
index 3fbeba7..c4e3a1a 100755
--- a/board/spear/common/spr_misc.c
+++ b/board/spear/common/spr_misc.c
@@ -62,6 +62,13 @@ int dram_init(void)
int misc_init_r(void)
{
+#if defined(CONFIG_CMD_NET)
+ uchar mac_id[6];
+
+ if (!eth_getenv_enetaddr("ethaddr", mac_id) && !i2c_read_mac(mac_id)) {
+ eth_setenv_enetaddr("ethaddr", mac_id);
+ }
+#endif
setenv("verify", "n");
return 0;
}
@@ -90,6 +97,46 @@ int spear_board_init(ulong mach_type)
return 0;
}
+static int i2c_read_mac(uchar *buffer)
+{
+ u8 buf[2];
+
+ i2c_read(0x50, 0x0, 1, buf, 2);
+
+ /* Check if mac in i2c memory is valid */
+ if ((buf[0] == 0x55) && (buf[1] == 0xAA)) {
+ /* Valid mac address is saved in i2c eeprom */
+ i2c_read(0x50, 0x2, 1, buffer, 6);
+ return 0;
+ }
+
+ return -1;
+}
+
+static int write_mac(uchar *mac)
+{
+ unsigned char buf[2];
+
+ buf[0] = 0x55;
+ buf[1] = 0xAA;
+ i2c_write(0x50, 0x0, 1, buf, 2);
+
+ buf[0] = 0x44;
+ buf[1] = 0x66;
+
+ i2c_read(0x50, 0x0, 1, buf, 2);
+
+ /* check if valid MAC address is saved in I2C EEPROM or not? */
+ if ((buf[0] == 0x55) && (buf[1] == 0xAA)) {
+ i2c_write(0x50, 0x2, 1, mac, 6);
+ puts("I2C EEPROM written with mac address \n");
+ return 0;
+ }
+
+ puts("I2C EEPROM writing failed \n");
+ return -1;
+}
+
#define CPU 0
#define DDR 1
@@ -97,7 +144,10 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
void (*sram_setfreq) (unsigned int, unsigned int);
struct chip_data *chip = &chip_data;
- unsigned int frequency;
+ unsigned char mac[6];
+ unsigned int reg, frequency;
+ char *s, *e;
+ char i2c_mac[20];
if ((argc > 3) || (argc < 2)) {
cmd_usage(cmdtp);
@@ -128,6 +178,17 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
}
return 0;
+ } else if (!strcmp(argv[1], "ethaddr")) {
+
+ s = argv[2];
+ for (reg = 0; reg < 6; ++reg) {
+ mac[reg] = s ? simple_strtoul(s, &e, 16) : 0;
+ if (s)
+ s = (*e) ? e + 1 : e;
+ }
+ write_mac(mac);
+
+ return 0;
} else if (!strcmp(argv[1], "display")) {
if (chip->cpufreq == -1)
@@ -147,6 +208,13 @@ int do_chip_config(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
else
printf("DDR Type = Not Known\n");
+ if (!i2c_read_mac(mac)) {
+ sprintf(i2c_mac, "%pM", mac);
+ printf("Ethaddr (from i2c mem) = %s\n", i2c_mac);
+ } else {
+ printf("Ethaddr (from i2c mem) = Not set\n");
+ }
+
printf("Xloader Rev = %s\n", chip->version);
return 0;
--
1.6.0.2
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