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sunxi: board: extract creating a unique sid into a helper function

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Refactor setup_environment() so we can use the created sid for a
Bluetooth address too.

Signed-off-by: Andre Heider <a.heider@gmail.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
[rebased]
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
This commit is contained in:
Andre Heider 2021-10-01 19:29:00 +01:00 committed by Andre Przywara
parent ec9cdaaa13
commit 928f4f4868
1 changed files with 58 additions and 47 deletions
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105
board/sunxi/board.c
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@ -789,6 +789,38 @@ static void parse_spl_header(const uint32_t spl_addr)
env_set_hex("fel_scriptaddr", spl->fel_script_address);
}
static bool get_unique_sid(unsigned int *sid)
{
if (sunxi_get_sid(sid) != 0)
return false;
if (!sid[0])
return false;
/*
* The single words 1 - 3 of the SID have quite a few bits
* which are the same on many models, so we take a crc32
* of all 3 words, to get a more unique value.
*
* Note we only do this on newer SoCs as we cannot change
* the algorithm on older SoCs since those have been using
* fixed mac-addresses based on only using word 3 for a
* long time and changing a fixed mac-address with an
* u-boot update is not good.
*/
#if !defined(CONFIG_MACH_SUN4I) && !defined(CONFIG_MACH_SUN5I) && \
!defined(CONFIG_MACH_SUN6I) && !defined(CONFIG_MACH_SUN7I) && \
!defined(CONFIG_MACH_SUN8I_A23) && !defined(CONFIG_MACH_SUN8I_A33)
sid[3] = crc32(0, (unsigned char *)&sid[1], 12);
#endif
/* Ensure the NIC specific bytes of the mac are not all 0 */
if ((sid[3] & 0xffffff) == 0)
sid[3] |= 0x800000;
return true;
}
/*
* Note this function gets called multiple times.
* It must not make any changes to env variables which already exist.
@ -799,61 +831,40 @@ static void setup_environment(const void *fdt)
unsigned int sid[4];
uint8_t mac_addr[6];
char ethaddr[16];
int i, ret;
int i;
ret = sunxi_get_sid(sid);
if (ret == 0 && sid[0] != 0) {
/*
* The single words 1 - 3 of the SID have quite a few bits
* which are the same on many models, so we take a crc32
* of all 3 words, to get a more unique value.
*
* Note we only do this on newer SoCs as we cannot change
* the algorithm on older SoCs since those have been using
* fixed mac-addresses based on only using word 3 for a
* long time and changing a fixed mac-address with an
* u-boot update is not good.
*/
#if !defined(CONFIG_MACH_SUN4I) && !defined(CONFIG_MACH_SUN5I) && \
!defined(CONFIG_MACH_SUN6I) && !defined(CONFIG_MACH_SUN7I) && \
!defined(CONFIG_MACH_SUN8I_A23) && !defined(CONFIG_MACH_SUN8I_A33)
sid[3] = crc32(0, (unsigned char *)&sid[1], 12);
#endif
if (!get_unique_sid(sid))
return;
/* Ensure the NIC specific bytes of the mac are not all 0 */
if ((sid[3] & 0xffffff) == 0)
sid[3] |= 0x800000;
for (i = 0; i < 4; i++) {
sprintf(ethaddr, "ethernet%d", i);
if (!fdt_get_alias(fdt, ethaddr))
continue;
for (i = 0; i < 4; i++) {
sprintf(ethaddr, "ethernet%d", i);
if (!fdt_get_alias(fdt, ethaddr))
continue;
if (i == 0)
strcpy(ethaddr, "ethaddr");
else
sprintf(ethaddr, "eth%daddr", i);
if (i == 0)
strcpy(ethaddr, "ethaddr");
else
sprintf(ethaddr, "eth%daddr", i);
if (env_get(ethaddr))
continue;
if (env_get(ethaddr))
continue;
/* Non OUI / registered MAC address */
mac_addr[0] = (i << 4) | 0x02;
mac_addr[1] = (sid[0] >> 0) & 0xff;
mac_addr[2] = (sid[3] >> 24) & 0xff;
mac_addr[3] = (sid[3] >> 16) & 0xff;
mac_addr[4] = (sid[3] >> 8) & 0xff;
mac_addr[5] = (sid[3] >> 0) & 0xff;
/* Non OUI / registered MAC address */
mac_addr[0] = (i << 4) | 0x02;
mac_addr[1] = (sid[0] >> 0) & 0xff;
mac_addr[2] = (sid[3] >> 24) & 0xff;
mac_addr[3] = (sid[3] >> 16) & 0xff;
mac_addr[4] = (sid[3] >> 8) & 0xff;
mac_addr[5] = (sid[3] >> 0) & 0xff;
eth_env_set_enetaddr(ethaddr, mac_addr);
}
eth_env_set_enetaddr(ethaddr, mac_addr);
}
if (!env_get("serial#")) {
snprintf(serial_string, sizeof(serial_string),
"%08x%08x", sid[0], sid[3]);
if (!env_get("serial#")) {
snprintf(serial_string, sizeof(serial_string),
"%08x%08x", sid[0], sid[3]);
env_set("serial#", serial_string);
}
env_set("serial#", serial_string);
}
}