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authorMichael Williamson <michael.williamson@criticallink.com>2010-09-17 17:56:06 +0400
committerKevin Hilman <khilman@deeprootsystems.com>2010-09-24 18:40:32 +0400
commit2a7dae04f3a5966ade5086ebd2e09f170fd0e085 (patch)
treea5a7a377d88be0d42696b4fc1abb8c9a90618440 /arch/arm/mach-davinci/board-mityomapl138.c
parent1f4640ae7c299ce87968cb3923c5f85254d68c37 (diff)
downloadlinux-2a7dae04f3a5966ade5086ebd2e09f170fd0e085.tar.xz
davinci: MityDSP-L138/MityARM-1808 read MAC address from I2C Prom
For the MityDSP-L138/MityARM-1808 SOMS, read the factory assigned MAC address from the onboard I2C EPROM and assign it to the emac device during platform initialization. Signed-off-by: Michael Williamson <michael.williamson@criticallink.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Diffstat (limited to 'arch/arm/mach-davinci/board-mityomapl138.c')
-rw-r--r--arch/arm/mach-davinci/board-mityomapl138.c62
1 files changed, 62 insertions, 0 deletions
diff --git a/arch/arm/mach-davinci/board-mityomapl138.c b/arch/arm/mach-davinci/board-mityomapl138.c
index 6f12a182333b..65f7501984db 100644
--- a/arch/arm/mach-davinci/board-mityomapl138.c
+++ b/arch/arm/mach-davinci/board-mityomapl138.c
@@ -15,6 +15,8 @@
#include <linux/mtd/partitions.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
+#include <linux/i2c/at24.h>
+#include <linux/etherdevice.h>
#include <asm/mach-types.h>
#include <asm/mach/arch.h>
@@ -25,6 +27,65 @@
#include <mach/mux.h>
#define MITYOMAPL138_PHY_ID "0:03"
+
+#define FACTORY_CONFIG_MAGIC 0x012C0138
+#define FACTORY_CONFIG_VERSION 0x00010001
+
+/* Data Held in On-Board I2C device */
+struct factory_config {
+ u32 magic;
+ u32 version;
+ u8 mac[6];
+ u32 fpga_type;
+ u32 spare;
+ u32 serialnumber;
+ char partnum[32];
+};
+
+static struct factory_config factory_config;
+
+static void read_factory_config(struct memory_accessor *a, void *context)
+{
+ int ret;
+ struct davinci_soc_info *soc_info = &davinci_soc_info;
+
+ ret = a->read(a, (char *)&factory_config, 0, sizeof(factory_config));
+ if (ret != sizeof(struct factory_config)) {
+ pr_warning("MityOMAPL138: Read Factory Config Failed: %d\n",
+ ret);
+ return;
+ }
+
+ if (factory_config.magic != FACTORY_CONFIG_MAGIC) {
+ pr_warning("MityOMAPL138: Factory Config Magic Wrong (%X)\n",
+ factory_config.magic);
+ return;
+ }
+
+ if (factory_config.version != FACTORY_CONFIG_VERSION) {
+ pr_warning("MityOMAPL138: Factory Config Version Wrong (%X)\n",
+ factory_config.version);
+ return;
+ }
+
+ pr_info("MityOMAPL138: Found MAC = %pM\n", factory_config.mac);
+ pr_info("MityOMAPL138: Part Number = %s\n", factory_config.partnum);
+ if (is_valid_ether_addr(factory_config.mac))
+ memcpy(soc_info->emac_pdata->mac_addr,
+ factory_config.mac, ETH_ALEN);
+ else
+ pr_warning("MityOMAPL138: Invalid MAC found "
+ "in factory config block\n");
+}
+
+static struct at24_platform_data mityomapl138_fd_chip = {
+ .byte_len = 256,
+ .page_size = 8,
+ .flags = AT24_FLAG_READONLY | AT24_FLAG_IRUGO,
+ .setup = read_factory_config,
+ .context = NULL,
+};
+
static struct davinci_i2c_platform_data mityomap_i2c_0_pdata = {
.bus_freq = 100, /* kHz */
.bus_delay = 0, /* usec */
@@ -151,6 +212,7 @@ static struct i2c_board_info __initdata mityomap_tps65023_info[] = {
},
{
I2C_BOARD_INFO("24c02", 0x50),
+ .platform_data = &mityomapl138_fd_chip,
},
};