u-boot/arch/arm/mach-omap2/utils.c
Peter Robinson b59670f2bd omap2: set the ethaddr as well as the usbethaddr env var to ensure static MAC
The kernel gets the ethernet MAC from the ethaddr variable, the omap boards for
devices with USB based eth adapters just set the usbethaddr which doesn't appear
to get passed to the kernel. The same Raspberry Pi code sets both ethaddr and
usbethaddr so lets do that so linux (tested 4.13 and 4.14) get a static rather
than a random MAC address, while not regressing users of usbethaddr.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
2017-12-02 18:32:58 -05:00

232 lines
4.7 KiB
C

/*
* Copyright 2011 Linaro Limited
* Aneesh V <aneesh@ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/setup.h>
#include <asm/arch/sys_proto.h>
static void do_cancel_out(u32 *num, u32 *den, u32 factor)
{
while (1) {
if (((*num)/factor*factor == (*num)) &&
((*den)/factor*factor == (*den))) {
(*num) /= factor;
(*den) /= factor;
} else
break;
}
}
#ifdef CONFIG_FASTBOOT_FLASH
static void omap_set_fastboot_cpu(void)
{
char *cpu;
u32 cpu_rev = omap_revision();
switch (cpu_rev) {
case DRA762_ES1_0:
cpu = "DRA762";
break;
case DRA752_ES1_0:
case DRA752_ES1_1:
case DRA752_ES2_0:
cpu = "DRA752";
break;
case DRA722_ES1_0:
case DRA722_ES2_0:
case DRA722_ES2_1:
cpu = "DRA722";
break;
default:
cpu = NULL;
printf("Warning: fastboot.cpu: unknown CPU rev: %u\n", cpu_rev);
}
env_set("fastboot.cpu", cpu);
}
static void omap_set_fastboot_secure(void)
{
const char *secure;
u32 dev = get_device_type();
switch (dev) {
case EMU_DEVICE:
secure = "EMU";
break;
case HS_DEVICE:
secure = "HS";
break;
case GP_DEVICE:
secure = "GP";
break;
default:
secure = NULL;
printf("Warning: fastboot.secure: unknown CPU sec: %u\n", dev);
}
env_set("fastboot.secure", secure);
}
static void omap_set_fastboot_board_rev(void)
{
const char *board_rev;
board_rev = env_get("board_rev");
if (board_rev == NULL)
printf("Warning: fastboot.board_rev: unknown board revision\n");
env_set("fastboot.board_rev", board_rev);
}
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
static u32 omap_mmc_get_part_size(const char *part)
{
int res;
struct blk_desc *dev_desc;
disk_partition_t info;
u64 sz = 0;
dev_desc = blk_get_dev("mmc", CONFIG_FASTBOOT_FLASH_MMC_DEV);
if (!dev_desc || dev_desc->type == DEV_TYPE_UNKNOWN) {
pr_err("invalid mmc device\n");
return 0;
}
/* Check only for EFI (GPT) partition table */
res = part_get_info_by_name_type(dev_desc, part, &info, PART_TYPE_EFI);
if (res < 0)
return 0;
/* Calculate size in bytes */
sz = (info.size * (u64)info.blksz);
/* to KiB */
sz >>= 10;
return (u32)sz;
}
static void omap_set_fastboot_userdata_size(void)
{
char buf[16];
u32 sz_kb;
sz_kb = omap_mmc_get_part_size("userdata");
if (sz_kb == 0)
return; /* probably it's not Android partition table */
sprintf(buf, "%u", sz_kb);
env_set("fastboot.userdata_size", buf);
}
#else
static inline void omap_set_fastboot_userdata_size(void)
{
}
#endif /* CONFIG_FASTBOOT_FLASH_MMC_DEV */
void omap_set_fastboot_vars(void)
{
omap_set_fastboot_cpu();
omap_set_fastboot_secure();
omap_set_fastboot_board_rev();
omap_set_fastboot_userdata_size();
}
#endif /* CONFIG_FASTBOOT_FLASH */
/*
* Cancel out the denominator and numerator of a fraction
* to get smaller numerator and denominator.
*/
void cancel_out(u32 *num, u32 *den, u32 den_limit)
{
do_cancel_out(num, den, 2);
do_cancel_out(num, den, 3);
do_cancel_out(num, den, 5);
do_cancel_out(num, den, 7);
do_cancel_out(num, den, 11);
do_cancel_out(num, den, 13);
do_cancel_out(num, den, 17);
while ((*den) > den_limit) {
*num /= 2;
/*
* Round up the denominator so that the final fraction
* (num/den) is always <= the desired value
*/
*den = (*den + 1) / 2;
}
}
__weak void omap_die_id(unsigned int *die_id)
{
die_id[0] = die_id[1] = die_id[2] = die_id[3] = 0;
}
void omap_die_id_serial(void)
{
unsigned int die_id[4] = { 0 };
char serial_string[17] = { 0 };
omap_die_id((unsigned int *)&die_id);
if (!env_get("serial#")) {
snprintf(serial_string, sizeof(serial_string),
"%08x%08x", die_id[0], die_id[3]);
env_set("serial#", serial_string);
}
}
void omap_die_id_get_board_serial(struct tag_serialnr *serialnr)
{
char *serial_string;
unsigned long long serial;
serial_string = env_get("serial#");
if (serial_string) {
serial = simple_strtoull(serial_string, NULL, 16);
serialnr->high = (unsigned int) (serial >> 32);
serialnr->low = (unsigned int) (serial & 0xffffffff);
} else {
serialnr->high = 0;
serialnr->low = 0;
}
}
void omap_die_id_usbethaddr(void)
{
unsigned int die_id[4] = { 0 };
unsigned char mac[6] = { 0 };
omap_die_id((unsigned int *)&die_id);
if (!env_get("usbethaddr")) {
/*
* Create a fake MAC address from the processor ID code.
* First byte is 0x02 to signify locally administered.
*/
mac[0] = 0x02;
mac[1] = die_id[3] & 0xff;
mac[2] = die_id[2] & 0xff;
mac[3] = die_id[1] & 0xff;
mac[4] = die_id[0] & 0xff;
mac[5] = (die_id[0] >> 8) & 0xff;
eth_env_set_enetaddr("usbethaddr", mac);
if (!env_get("ethaddr"))
eth_env_set_enetaddr("ethaddr", mac);
}
}
void omap_die_id_display(void)
{
unsigned int die_id[4] = { 0 };
omap_die_id(die_id);
printf("OMAP die ID: %08x%08x%08x%08x\n", die_id[3], die_id[2],
die_id[1], die_id[0]);
}