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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>
This commit is contained in:
Michael Williamson 2010-09-17 09:56:06 -04:00 committed by Kevin Hilman
parent 1f4640ae7c
commit 2a7dae04f3
1 changed files with 62 additions and 0 deletions
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62
arch/arm/mach-davinci/board-mityomapl138.c
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@ -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,
},
};