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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
Daniel Schwierzeck
parent
d09d21cd2d
commit
7b3af03ffd
@ -4,11 +4,44 @@
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*/
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#include <common.h>
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#include <environment.h>
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#include <led.h>
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#include <net.h>
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#include <spi.h>
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#include <spi_flash.h>
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#include <uuid.h>
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#include <linux/ctype.h>
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#include <linux/io.h>
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#define MT76XX_AGPIO_CFG 0x1000003c
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#define FACTORY_DATA_OFFS 0xc0000
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#define FACTORY_DATA_SECT_SIZE 0x10000
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#if ((CONFIG_ENV_OFFSET_REDUND + CONFIG_ENV_SIZE_REDUND) > FACTORY_DATA_OFFS)
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#error "U-Boot image with environment too big (overlapping with factory-data)!"
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#endif
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#define FACTORY_DATA_USER_OFFS 0x140
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#define FACTORY_DATA_SIZE 0x1f0
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#define FACTORY_DATA_CRC_LEN (FACTORY_DATA_SIZE - \
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FACTORY_DATA_USER_OFFS - sizeof(u32))
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#define FACTORY_DATA_MAGIC 0xCAFEBABE
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struct factory_data_values {
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u8 pad_1[4];
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u8 wifi_mac[6]; /* offs: 0x004: binary value */
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u8 pad_2[30];
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u8 eth_mac[6]; /* offs: 0x028: binary value */
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u8 pad_3[FACTORY_DATA_USER_OFFS - 4 - 6 - 30 - 6];
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/* User values start here at offset 0x140 */
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u32 crc;
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u32 magic;
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u32 version;
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char ipr_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
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char hqv_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
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char unielec_id[UUID_STR_LEN]; /* UUID as string w/o ending \0 */
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};
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int board_early_init_f(void)
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{
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void __iomem *gpio_mode;
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@ -20,10 +53,246 @@ int board_early_init_f(void)
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return 0;
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}
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static bool prepare_uuid_var(const char *fd_ptr, const char *env_var_name,
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char errorchar)
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{
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char str[UUID_STR_LEN + 1] = { 0 }; /* Enough for UUID stuff */
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bool env_updated = false;
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char *env;
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int i;
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memcpy(str, fd_ptr, UUID_STR_LEN);
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/* Convert non-ascii character to 'X' */
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for (i = 0; i < UUID_STR_LEN; i++) {
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if (!(isascii(str[i]) && isprint(str[i])))
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str[i] = errorchar;
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}
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env = env_get(env_var_name);
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if (strcmp(env, str)) {
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env_set(env_var_name, str);
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env_updated = true;
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}
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return env_updated;
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}
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static void factory_data_env_config(void)
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{
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struct factory_data_values *fd;
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struct spi_flash *sf;
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int env_updated = 0;
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char str[UUID_STR_LEN + 1]; /* Enough for UUID stuff */
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char *env;
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u8 *buf;
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u32 crc;
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int ret;
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u8 *ptr;
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buf = malloc(FACTORY_DATA_SIZE);
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if (!buf) {
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printf("F-Data:Unable to allocate buffer\n");
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return;
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}
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/*
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* Get values from factory-data area in SPI NOR
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*/
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sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
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CONFIG_SF_DEFAULT_CS,
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CONFIG_SF_DEFAULT_SPEED,
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CONFIG_SF_DEFAULT_MODE);
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if (!sf) {
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printf("F-Data:Unable to access SPI NOR flash\n");
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goto err_free;
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}
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ret = spi_flash_read(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SIZE,
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(void *)buf);
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if (ret) {
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printf("F-Data:Unable to read factory-data from SPI NOR\n");
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goto err_spi_flash;
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}
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fd = (struct factory_data_values *)buf;
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if (fd->magic != FACTORY_DATA_MAGIC)
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printf("F-Data:Magic value not correct\n");
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crc = crc32(0, (u8 *)&fd->magic, FACTORY_DATA_CRC_LEN);
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if (crc != fd->crc)
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printf("F-Data:CRC not correct\n");
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else
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printf("F-Data:factory-data version %x detected\n",
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fd->version);
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/* Handle wifi_mac env variable */
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ptr = fd->wifi_mac;
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sprintf(str, "%pM", ptr);
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if (!is_valid_ethaddr(ptr))
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printf("F-Data:Invalid MAC addr: wifi_mac %s\n", str);
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env = env_get("wifiaddr");
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if (strcmp(env, str)) {
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env_set("wifiaddr", str);
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env_updated = 1;
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}
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/* Handle eth_mac env variable */
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ptr = fd->eth_mac;
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sprintf(str, "%pM", ptr);
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if (!is_valid_ethaddr(ptr))
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printf("F-Data:Invalid MAC addr: eth_mac %s\n", str);
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env = env_get("ethaddr");
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if (strcmp(env, str)) {
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env_set("ethaddr", str);
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env_updated = 1;
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}
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/* Handle UUID env variables */
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env_updated |= prepare_uuid_var(fd->ipr_id, "linuxmoduleid", 'X');
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env_updated |= prepare_uuid_var(fd->hqv_id, "linuxmodulehqvid", '\0');
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env_updated |= prepare_uuid_var(fd->unielec_id,
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"linuxmoduleunielecid", '\0');
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/* Check if the environment was updated and needs to get stored */
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if (env_updated != 0) {
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printf("F-Data:Values don't match env values -> saving\n");
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env_save();
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} else {
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debug("F-Data:Values match current env values\n");
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}
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err_spi_flash:
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spi_flash_free(sf);
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err_free:
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free(buf);
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}
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int board_late_init(void)
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{
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if (IS_ENABLED(CONFIG_LED))
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led_default_state();
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factory_data_env_config();
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return 0;
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}
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static void copy_or_generate_uuid(char *fd_ptr, const char *env_var_name)
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{
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char str[UUID_STR_LEN + 1] = { 0 }; /* Enough for UUID stuff */
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char *env;
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/* Don't use the UUID dest place, as the \0 char won't fit */
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env = env_get(env_var_name);
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if (env)
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strncpy(str, env, UUID_STR_LEN);
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else
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gen_rand_uuid_str(str, UUID_STR_FORMAT_STD);
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memcpy(fd_ptr, str, UUID_STR_LEN);
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}
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/*
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* Helper function to provide some sane factory-data values for testing
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* purpose, when these values are not programmed correctly
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*/
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int do_fd_write(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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struct factory_data_values *fd;
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struct spi_flash *sf;
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u8 *buf;
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int ret = CMD_RET_FAILURE;
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buf = malloc(FACTORY_DATA_SECT_SIZE);
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if (!buf) {
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printf("F-Data:Unable to allocate buffer\n");
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return CMD_RET_FAILURE;
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}
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sf = spi_flash_probe(CONFIG_SF_DEFAULT_BUS,
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CONFIG_SF_DEFAULT_CS,
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CONFIG_SF_DEFAULT_SPEED,
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CONFIG_SF_DEFAULT_MODE);
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if (!sf) {
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printf("F-Data:Unable to access SPI NOR flash\n");
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goto err_free;
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}
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/* Generate the factory-data struct */
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/* Fist read complete sector into buffer */
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ret = spi_flash_read(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
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(void *)buf);
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if (ret) {
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printf("F-Data:spi_flash_read failed (%d)\n", ret);
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goto err_spi_flash;
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}
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fd = (struct factory_data_values *)buf;
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fd->magic = FACTORY_DATA_MAGIC;
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fd->version = 0x1;
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/* Use existing MAC and UUID values or generate some random ones */
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if (!eth_env_get_enetaddr("wifiaddr", fd->wifi_mac)) {
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net_random_ethaddr(fd->wifi_mac);
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/* to get a different seed value for the MAC address */
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mdelay(10);
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}
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if (!eth_env_get_enetaddr("ethaddr", fd->eth_mac))
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net_random_ethaddr(fd->eth_mac);
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copy_or_generate_uuid(fd->ipr_id, "linuxmoduleid");
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copy_or_generate_uuid(fd->hqv_id, "linuxmodulehqvid");
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copy_or_generate_uuid(fd->unielec_id, "linuxmoduleunielecid");
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printf("New factory-data values:\n");
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printf("wifiaddr=%pM\n", fd->wifi_mac);
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printf("ethaddr=%pM\n", fd->eth_mac);
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/*
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* We don't have the \0 char at the end, so we need to specify the
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* length in the printf format instead
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*/
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printf("linuxmoduleid=%." __stringify(UUID_STR_LEN) "s\n", fd->ipr_id);
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printf("linuxmodulehqvid=%." __stringify(UUID_STR_LEN) "s\n",
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fd->hqv_id);
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printf("linuxmoduleunielecid=%." __stringify(UUID_STR_LEN) "s\n",
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fd->unielec_id);
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fd->crc = crc32(0, (u8 *)&fd->magic, FACTORY_DATA_CRC_LEN);
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ret = spi_flash_erase(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE);
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if (ret) {
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printf("F-Data:spi_flash_erase failed (%d)\n", ret);
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goto err_spi_flash;
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}
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ret = spi_flash_write(sf, FACTORY_DATA_OFFS, FACTORY_DATA_SECT_SIZE,
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buf);
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if (ret) {
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printf("F-Data:spi_flash_write failed (%d)\n", ret);
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goto err_spi_flash;
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}
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printf("F-Data:factory-data values written to SPI NOR flash\n");
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err_spi_flash:
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spi_flash_free(sf);
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err_free:
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free(buf);
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return ret;
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}
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U_BOOT_CMD(
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fd_write, 1, 0, do_fd_write,
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"Write test factory-data values to SPI NOR",
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"\n"
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);
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