mips: mt76xx: gardena-smart-gateway: Add factory data variable handling

Some factory data is stored in the SPI NOR and needs to get extracted
from there into U-Boot environment variables.

This patch also includes a board-specific command "fd_write" to
provide some dummy / default values for this factory-data in the SPI
NOR flash. This should only be necessary for testing purposes though.

Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
This commit is contained in:
Stefan Roese 2018-11-30 07:46:30 +01:00 committed by Daniel Schwierzeck
parent d09d21cd2d
commit 7b3af03ffd

View File

@ -4,11 +4,44 @@
*/
#include <common.h>
#include <environment.h>
#include <led.h>
#include <net.h>
#include <spi.h>
#include <spi_flash.h>
#include <uuid.h>
#include <linux/ctype.h>
#include <linux/io.h>
#define MT76XX_AGPIO_CFG 0x1000003c
#define FACTORY_DATA_OFFS 0xc0000
#define FACTORY_DATA_SECT_SIZE 0x10000
#if ((CONFIG_ENV_OFFSET_REDUND + CONFIG_ENV_SIZE_REDUND) > FACTORY_DATA_OFFS)
#error "U-Boot image with environment too big (overlapping with factory-data)!"
#endif
#define FACTORY_DATA_USER_OFFS 0x140
#define FACTORY_DATA_SIZE 0x1f0
#define FACTORY_DATA_CRC_LEN (FACTORY_DATA_SIZE - \
FACTORY_DATA_USER_OFFS - sizeof(u32))
#define FACTORY_DATA_MAGIC 0xCAFEBABE
struct factory_data_values {
u8 pad_1[4];
u8 wifi_mac[6]; /* offs: 0x004: binary value */
u8 pad_2[30];
u8 eth_mac[6]; /* offs: 0x028: binary value */
u8 pad_3[FACTORY_DATA_USER_OFFS - 4 - 6 - 30 - 6];
/* User values start here at offset 0x140 */
u32 crc;
u32 magic;
u32 version;
char ipr_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
char hqv_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
char unielec_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
};
int board_early_init_f(void)
{
void __iomem *gpio_mode;
@ -20,10 +53,246 @@ int board_early_init_f(void)
return 0;
}
static bool prepare_uuid_var(const char *fd_ptr, const char *env_var_name,
char errorchar)
{
char str[UUID_STR_LEN + 1] = { 0 }; /* Enough for UUID stuff */
bool env_updated = false;
char *env;
int i;
memcpy(str, fd_ptr, UUID_STR_LEN);
/* Convert non-ascii character to 'X' */
for (i = 0; i < UUID_STR_LEN; i++) {
if (!(isascii(str[i]) && isprint(str[i])))
str[i] = errorchar;
}
env = env_get(env_var_name);
if (strcmp(env, str)) {
env_set(env_var_name, str);
env_updated = true;
}
return env_updated;
}
static void factory_data_env_config(void)
{
struct factory_data_values *fd;
struct spi_flash *sf;
int env_updated = 0;
char str[UUID_STR_LEN + 1]; /* Enough for UUID stuff */
char *env;
u8 *buf;
u32 crc;
int ret;
u8 *ptr;
buf = malloc(FACTORY_DATA_SIZE);
if (!buf) {
printf("F-Data:Unable to allocate buffer\n");
return;
}
/*
* Get values from factory-data area in SPI NOR
*/
sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
CONFIG_SF_DEFAULT_CS,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!sf) {
printf("F-Data:Unable to access SPI NOR flash\n");
goto err_free;
}
ret = spi_flash_read(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SIZE,
(void *)buf);
if (ret) {
printf("F-Data:Unable to read factory-data from SPI NOR\n");
goto err_spi_flash;
}
fd = (struct factory_data_values *)buf;
if (fd->magic != FACTORY_DATA_MAGIC)
printf("F-Data:Magic value not correct\n");
crc = crc32(0, (u8 *)&fd->magic, FACTORY_DATA_CRC_LEN);
if (crc != fd->crc)
printf("F-Data:CRC not correct\n");
else
printf("F-Data:factory-data version %x detected\n",
fd->version);
/* Handle wifi_mac env variable */
ptr = fd->wifi_mac;
sprintf(str, "%pM", ptr);
if (!is_valid_ethaddr(ptr))
printf("F-Data:Invalid MAC addr: wifi_mac %s\n", str);
env = env_get("wifiaddr");
if (strcmp(env, str)) {
env_set("wifiaddr", str);
env_updated = 1;
}
/* Handle eth_mac env variable */
ptr = fd->eth_mac;
sprintf(str, "%pM", ptr);
if (!is_valid_ethaddr(ptr))
printf("F-Data:Invalid MAC addr: eth_mac %s\n", str);
env = env_get("ethaddr");
if (strcmp(env, str)) {
env_set("ethaddr", str);
env_updated = 1;
}
/* Handle UUID env variables */
env_updated |= prepare_uuid_var(fd->ipr_id, "linuxmoduleid", 'X');
env_updated |= prepare_uuid_var(fd->hqv_id, "linuxmodulehqvid", '\0');
env_updated |= prepare_uuid_var(fd->unielec_id,
"linuxmoduleunielecid", '\0');
/* Check if the environment was updated and needs to get stored */
if (env_updated != 0) {
printf("F-Data:Values don't match env values -> saving\n");
env_save();
} else {
debug("F-Data:Values match current env values\n");
}
err_spi_flash:
spi_flash_free(sf);
err_free:
free(buf);
}
int board_late_init(void)
{
if (IS_ENABLED(CONFIG_LED))
led_default_state();
factory_data_env_config();
return 0;
}
static void copy_or_generate_uuid(char *fd_ptr, const char *env_var_name)
{
char str[UUID_STR_LEN + 1] = { 0 }; /* Enough for UUID stuff */
char *env;
/* Don't use the UUID dest place, as the \0 char won't fit */
env = env_get(env_var_name);
if (env)
strncpy(str, env, UUID_STR_LEN);
else
gen_rand_uuid_str(str, UUID_STR_FORMAT_STD);
memcpy(fd_ptr, str, UUID_STR_LEN);
}
/*
* Helper function to provide some sane factory-data values for testing
* purpose, when these values are not programmed correctly
*/
int do_fd_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
{
struct factory_data_values *fd;
struct spi_flash *sf;
u8 *buf;
int ret = CMD_RET_FAILURE;
buf = malloc(FACTORY_DATA_SECT_SIZE);
if (!buf) {
printf("F-Data:Unable to allocate buffer\n");
return CMD_RET_FAILURE;
}
sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
CONFIG_SF_DEFAULT_CS,
CONFIG_SF_DEFAULT_SPEED,
CONFIG_SF_DEFAULT_MODE);
if (!sf) {
printf("F-Data:Unable to access SPI NOR flash\n");
goto err_free;
}
/* Generate the factory-data struct */
/* Fist read complete sector into buffer */
ret = spi_flash_read(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
(void *)buf);
if (ret) {
printf("F-Data:spi_flash_read failed (%d)\n", ret);
goto err_spi_flash;
}
fd = (struct factory_data_values *)buf;
fd->magic = FACTORY_DATA_MAGIC;
fd->version = 0x1;
/* Use existing MAC and UUID values or generate some random ones */
if (!eth_env_get_enetaddr("wifiaddr", fd->wifi_mac)) {
net_random_ethaddr(fd->wifi_mac);
/* to get a different seed value for the MAC address */
mdelay(10);
}
if (!eth_env_get_enetaddr("ethaddr", fd->eth_mac))
net_random_ethaddr(fd->eth_mac);
copy_or_generate_uuid(fd->ipr_id, "linuxmoduleid");
copy_or_generate_uuid(fd->hqv_id, "linuxmodulehqvid");
copy_or_generate_uuid(fd->unielec_id, "linuxmoduleunielecid");
printf("New factory-data values:\n");
printf("wifiaddr=%pM\n", fd->wifi_mac);
printf("ethaddr=%pM\n", fd->eth_mac);
/*
* We don't have the \0 char at the end, so we need to specify the
* length in the printf format instead
*/
printf("linuxmoduleid=%." __stringify(UUID_STR_LEN) "s\n", fd->ipr_id);
printf("linuxmodulehqvid=%." __stringify(UUID_STR_LEN) "s\n",
fd->hqv_id);
printf("linuxmoduleunielecid=%." __stringify(UUID_STR_LEN) "s\n",
fd->unielec_id);
fd->crc = crc32(0, (u8 *)&fd->magic, FACTORY_DATA_CRC_LEN);
ret = spi_flash_erase(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE);
if (ret) {
printf("F-Data:spi_flash_erase failed (%d)\n", ret);
goto err_spi_flash;
}
ret = spi_flash_write(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
buf);
if (ret) {
printf("F-Data:spi_flash_write failed (%d)\n", ret);
goto err_spi_flash;
}
printf("F-Data:factory-data values written to SPI NOR flash\n");
err_spi_flash:
spi_flash_free(sf);
err_free:
free(buf);
return ret;
}
U_BOOT_CMD(
fd_write, 1, 0, do_fd_write,
"Write test factory-data values to SPI NOR",
"\n"
);