diff options
Diffstat (limited to 'cmd/eeprom.c')
| -rw-r--r-- | cmd/eeprom.c | 148 |
1 files changed, 147 insertions, 1 deletions
diff --git a/cmd/eeprom.c b/cmd/eeprom.c index 208b4138c1..39ebee8dd9 100644 --- a/cmd/eeprom.c +++ b/cmd/eeprom.c @@ -207,6 +207,131 @@ int eeprom_write(unsigned dev_addr, unsigned offset, return ret; } +#ifdef CONFIG_CMD_EEPROM_LAYOUT +#include <eeprom_layout.h> + +__weak int eeprom_parse_layout_version(char *str) +{ + return LAYOUT_VERSION_UNRECOGNIZED; +} + +static unsigned char eeprom_buf[CONFIG_SYS_EEPROM_SIZE]; + +#ifndef CONFIG_EEPROM_LAYOUT_HELP_STRING +#define CONFIG_EEPROM_LAYOUT_HELP_STRING "<not defined>" +#endif + +enum eeprom_action { + EEPROM_PRINT, + EEPROM_UPDATE, + EEPROM_ACTION_INVALID, +}; + +static enum eeprom_action parse_action(char *cmd) +{ + if (!strncmp(cmd, "print", 5)) + return EEPROM_PRINT; + if (!strncmp(cmd, "update", 6)) + return EEPROM_UPDATE; + + return EEPROM_ACTION_INVALID; +} + +static int parse_numeric_param(char *str) +{ + char *endptr; + int value = simple_strtol(str, &endptr, 16); + + return (*endptr != '\0') ? -1 : value; +} + +static int eeprom_execute_command(enum eeprom_action action, int i2c_bus, + int i2c_addr, int layout_ver, char *key, + char *value) +{ + int rcode; + struct eeprom_layout layout; + + if (action == EEPROM_ACTION_INVALID) + return CMD_RET_USAGE; + + eeprom_init(i2c_bus); + rcode = eeprom_read(i2c_addr, 0, eeprom_buf, CONFIG_SYS_EEPROM_SIZE); + if (rcode < 0) + return rcode; + + eeprom_layout_setup(&layout, eeprom_buf, CONFIG_SYS_EEPROM_SIZE, + layout_ver); + + if (action == EEPROM_PRINT) { + layout.print(&layout); + return 0; + } + + layout.update(&layout, key, value); + + rcode = eeprom_write(i2c_addr, 0, layout.data, CONFIG_SYS_EEPROM_SIZE); + + return rcode; +} + +#define NEXT_PARAM(argc, index) { (argc)--; (index)++; } +static int do_eeprom_layout(cmd_tbl_t *cmdtp, int flag, int argc, + char * const argv[]) +{ + int layout_ver = LAYOUT_VERSION_AUTODETECT; + enum eeprom_action action = EEPROM_ACTION_INVALID; + int i2c_bus = -1, i2c_addr = -1, index = 0; + char *field_name = ""; + char *field_value = ""; + + if (argc <= 1) + return CMD_RET_USAGE; + + NEXT_PARAM(argc, index); /* Skip program name */ + + action = parse_action(argv[index]); + NEXT_PARAM(argc, index); + + if (argc <= 1) + return CMD_RET_USAGE; + + if (!strcmp(argv[index], "-l")) { + NEXT_PARAM(argc, index); + + layout_ver = eeprom_parse_layout_version(argv[index]); + NEXT_PARAM(argc, index); + } + + if (argc <= 1) + return CMD_RET_USAGE; + + i2c_bus = parse_numeric_param(argv[index]); + NEXT_PARAM(argc, index); + + i2c_addr = parse_numeric_param(argv[index]); + NEXT_PARAM(argc, index); + + if (action == EEPROM_PRINT) + goto done; + + if (argc) { + field_name = argv[index]; + NEXT_PARAM(argc, index); + } + + if (argc) { + field_value = argv[index]; + NEXT_PARAM(argc, index); + } + +done: + return eeprom_execute_command(action, i2c_bus, i2c_addr, layout_ver, + field_name, field_value); +} + +#endif + static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { const char *const fmt = @@ -216,6 +341,13 @@ static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) ulong dev_addr, addr, off, cnt; int bus_addr; +#ifdef CONFIG_CMD_EEPROM_LAYOUT + if (argc >= 2) { + if (!strcmp(argv[1], "update") || !strcmp(argv[1], "print")) + return do_eeprom_layout(cmdtp, flag, argc, argv); + } +#endif + switch (argc) { #ifdef CONFIG_SYS_DEF_EEPROM_ADDR case 5: @@ -261,9 +393,23 @@ static int do_eeprom(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) } U_BOOT_CMD( - eeprom, 7, 1, do_eeprom, + eeprom, 8, 1, do_eeprom, "EEPROM sub-system", "read <bus> <devaddr> addr off cnt\n" "eeprom write <bus> <devaddr> addr off cnt\n" " - read/write `cnt' bytes from `devaddr` EEPROM at offset `off'" +#ifdef CONFIG_CMD_EEPROM_LAYOUT + "\n" + "eeprom print [-l <layout_version>] bus devaddr\n" + " - Print layout fields and their data in human readable format\n" + "eeprom update [-l <layout_version>] bus devaddr <field_name> <field_value>\n" + " - Update a specific eeprom field with new data.\n" + " The new data must be written in the same human readable format as shown by the print command.\n" + "\n" + "LAYOUT VERSIONS\n" + "The -l option can be used to force the command to interpret the EEPROM data using the chosen layout.\n" + "If the -l option is omitted, the command will auto detect the layout based on the data in the EEPROM.\n" + "The values which can be provided with the -l option are:\n" + CONFIG_EEPROM_LAYOUT_HELP_STRING"\n" +#endif ) |