From: Andre Heider a.heider@gmail.com
Refactor setup_environment() so we can use the created sid for a Bluetooth address too.
Acked-by: Maxime Ripard mripard@kernel.org Reviewed-by: Andre Przywara andre.przywara@arm.com Signed-off-by: Andre Heider a.heider@gmail.com [rebased] Signed-off-by: Jernej Skrabec jernej.skrabec@siol.net --- board/sunxi/board.c | 121 ++++++++++++++++++++++++-------------------- 1 file changed, 66 insertions(+), 55 deletions(-)
diff --git a/board/sunxi/board.c b/board/sunxi/board.c index 708a27ed78e9..4a29e351141b 100644 --- a/board/sunxi/board.c +++ b/board/sunxi/board.c @@ -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; - - 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 - - /* 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; - - if (i == 0) - strcpy(ethaddr, "ethaddr"); - else - sprintf(ethaddr, "eth%daddr", i); - - 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; - - eth_env_set_enetaddr(ethaddr, mac_addr); - } - - if (!env_get("serial#")) { - snprintf(serial_string, sizeof(serial_string), - "%08x%08x", sid[0], sid[3]); - - env_set("serial#", serial_string); - } + int i; + + if (!get_unique_sid(sid)) + return; + + 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 (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; + + eth_env_set_enetaddr(ethaddr, mac_addr); + } + + if (!env_get("serial#")) { + snprintf(serial_string, sizeof(serial_string), + "%08x%08x", sid[0], sid[3]); + + env_set("serial#", serial_string); } }