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OMAP: common: consolidate fake USB ethernet MAC address creation

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TI platforms such as OMAP5uevm, PandaBoard, use equivalent
logic to generate fake USB MAC address from device unique DIE ID.

Consolidate this to a generic location such that other TI platforms such
as BeagleBoard-XM can also use the same.

NOTE: at this point in time, I dont yet see a need for a generic dummy
ethernet MAC address creation function, but if there is a need in the
future, this can be further abstracted out.

Signed-off-by: Nishanth Menon <nm@ti.com>
This commit is contained in:
Nishanth Menon 2014-03-28 11:00:04 -05:00 committed by Tom Rini
parent a88e55c4c6
commit 8a0c6d6fa9
4 changed files with 36 additions and 31 deletions
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21
arch/arm/cpu/armv7/omap-common/utils.c
View File

@ -5,6 +5,7 @@
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <asm/arch/sys_proto.h>
static void do_cancel_out(u32 *num, u32 *den, u32 factor)
{
while (1) {
@ -39,3 +40,23 @@ void cancel_out(u32 *num, u32 *den, u32 den_limit)
*den = (*den + 1) / 2;
}
}
void __weak usb_fake_mac_from_die_id(u32 *id)
{
uint8_t device_mac[6];
if (!getenv("usbethaddr")) {
/*
* create a fake MAC address from the processor ID code.
* first byte is 0x02 to signify locally administered.
*/
device_mac[0] = 0x02;
device_mac[1] = id[3] & 0xff;
device_mac[2] = id[2] & 0xff;
device_mac[3] = id[1] & 0xff;
device_mac[4] = id[0] & 0xff;
device_mac[5] = (id[0] >> 8) & 0xff;
eth_setenv_enetaddr("usbethaddr", device_mac);
}
}

2
arch/arm/include/asm/omap_common.h
View File

@ -574,6 +574,8 @@ void abb_setup(u32 fuse, u32 ldovbb, u32 setup, u32 control,
u32 txdone, u32 txdone_mask, u32 opp);
s8 abb_setup_ldovbb(u32 fuse, u32 ldovbb);
void usb_fake_mac_from_die_id(u32 *id);
/* HW Init Context */
#define OMAP_INIT_CONTEXT_SPL 0
#define OMAP_INIT_CONTEXT_UBOOT_FROM_NOR 1

23
board/ti/omap5_uevm/evm.c
View File

@ -119,28 +119,19 @@ static void enable_host_clocks(void)
int misc_init_r(void)
{
int reg;
uint8_t device_mac[6];
u32 id[4];
#ifdef CONFIG_PALMAS_POWER
palmas_init_settings();
#endif
if (!getenv("usbethaddr")) {
reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
reg = DIE_ID_REG_BASE + DIE_ID_REG_OFFSET;
/*
* create a fake MAC address from the processor ID code.
* first byte is 0x02 to signify locally administered.
*/
device_mac[0] = 0x02;
device_mac[1] = readl(reg + 0x10) & 0xff;
device_mac[2] = readl(reg + 0xC) & 0xff;
device_mac[3] = readl(reg + 0x8) & 0xff;
device_mac[4] = readl(reg) & 0xff;
device_mac[5] = (readl(reg) >> 8) & 0xff;
eth_setenv_enetaddr("usbethaddr", device_mac);
}
id[0] = readl(reg);
id[1] = readl(reg + 0x8);
id[2] = readl(reg + 0xC);
id[3] = readl(reg + 0x10);
usb_fake_mac_from_die_id(id);
return 0;
}

21
board/ti/panda/panda.c
View File

@ -193,7 +193,7 @@ int misc_init_r(void)
{
int phy_type;
u32 auxclk, altclksrc;
uint8_t device_mac[6];
u32 id[4];
/* EHCI is not supported on ES1.0 */
if (omap_revision() == OMAP4430_ES1_0)
@ -247,20 +247,11 @@ int misc_init_r(void)
writel(altclksrc, &scrm->altclksrc);
if (!getenv("usbethaddr")) {
/*
* create a fake MAC address from the processor ID code.
* first byte is 0x02 to signify locally administered.
*/
device_mac[0] = 0x02;
device_mac[1] = readl(STD_FUSE_DIE_ID_3) & 0xff;
device_mac[2] = readl(STD_FUSE_DIE_ID_2) & 0xff;
device_mac[3] = readl(STD_FUSE_DIE_ID_1) & 0xff;
device_mac[4] = readl(STD_FUSE_DIE_ID_0) & 0xff;
device_mac[5] = (readl(STD_FUSE_DIE_ID_0) >> 8) & 0xff;
eth_setenv_enetaddr("usbethaddr", device_mac);
}
id[0] = readl(STD_FUSE_DIE_ID_0);
id[1] = readl(STD_FUSE_DIE_ID_1);
id[2] = readl(STD_FUSE_DIE_ID_2);
id[3] = readl(STD_FUSE_DIE_ID_3);
usb_fake_mac_from_die_id(id);
return 0;
}