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![Eugeniu Rosca](/assets/img/avatar_default.png)
Our R-Car3 Android userspace relies on the output of 'fastboot
getvar platform' and U-Boot currently is not able to handle it:
host $> fastboot getvar platform
getvar:platform FAILED (remote: Variable not implemented)
finished. total time: 0.001s
We either have the option of adding 'fastboot.platform' variable
to the default/saved environment as a workaround or add proper
'fastboot getvar platform' support in U-Boot via this patch.
In the latter case, other platforms can benefit from it too.
Note that R-Car3 already exports 'platform' environment variable via
v2019.01 commit 00e4b57e9e
("ARM: rmobile: Set environment variable
containing CPU type").
Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com>
245 lines
6.2 KiB
C
245 lines
6.2 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*/
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#include <common.h>
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#include <fastboot.h>
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#include <fastboot-internal.h>
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#include <fb_mmc.h>
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#include <fb_nand.h>
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#include <fs.h>
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#include <version.h>
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static void getvar_version(char *var_parameter, char *response);
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static void getvar_bootloader_version(char *var_parameter, char *response);
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static void getvar_downloadsize(char *var_parameter, char *response);
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static void getvar_serialno(char *var_parameter, char *response);
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static void getvar_version_baseband(char *var_parameter, char *response);
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static void getvar_product(char *var_parameter, char *response);
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static void getvar_platform(char *var_parameter, char *response);
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static void getvar_current_slot(char *var_parameter, char *response);
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static void getvar_slot_suffixes(char *var_parameter, char *response);
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static void getvar_has_slot(char *var_parameter, char *response);
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
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static void getvar_partition_type(char *part_name, char *response);
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#endif
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
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static void getvar_partition_size(char *part_name, char *response);
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#endif
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static const struct {
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const char *variable;
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void (*dispatch)(char *var_parameter, char *response);
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} getvar_dispatch[] = {
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{
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.variable = "version",
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.dispatch = getvar_version
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}, {
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.variable = "bootloader-version",
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.dispatch = getvar_bootloader_version
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}, {
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.variable = "version-bootloader",
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.dispatch = getvar_bootloader_version
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}, {
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.variable = "downloadsize",
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.dispatch = getvar_downloadsize
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}, {
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.variable = "max-download-size",
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.dispatch = getvar_downloadsize
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}, {
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.variable = "serialno",
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.dispatch = getvar_serialno
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}, {
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.variable = "version-baseband",
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.dispatch = getvar_version_baseband
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}, {
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.variable = "product",
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.dispatch = getvar_product
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}, {
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.variable = "platform",
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.dispatch = getvar_platform
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}, {
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.variable = "current-slot",
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.dispatch = getvar_current_slot
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}, {
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.variable = "slot-suffixes",
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.dispatch = getvar_slot_suffixes
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}, {
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.variable = "has-slot",
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.dispatch = getvar_has_slot
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
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}, {
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.variable = "partition-type",
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.dispatch = getvar_partition_type
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#endif
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
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}, {
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.variable = "partition-size",
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.dispatch = getvar_partition_size
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#endif
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}
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};
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static void getvar_version(char *var_parameter, char *response)
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{
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fastboot_okay(FASTBOOT_VERSION, response);
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}
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static void getvar_bootloader_version(char *var_parameter, char *response)
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{
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fastboot_okay(U_BOOT_VERSION, response);
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}
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static void getvar_downloadsize(char *var_parameter, char *response)
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{
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fastboot_response("OKAY", response, "0x%08x", fastboot_buf_size);
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}
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static void getvar_serialno(char *var_parameter, char *response)
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{
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const char *tmp = env_get("serial#");
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if (tmp)
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fastboot_okay(tmp, response);
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else
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fastboot_fail("Value not set", response);
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}
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static void getvar_version_baseband(char *var_parameter, char *response)
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{
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fastboot_okay("N/A", response);
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}
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static void getvar_product(char *var_parameter, char *response)
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{
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const char *board = env_get("board");
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if (board)
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fastboot_okay(board, response);
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else
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fastboot_fail("Board not set", response);
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}
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static void getvar_platform(char *var_parameter, char *response)
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{
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const char *p = env_get("platform");
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if (p)
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fastboot_okay(p, response);
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else
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fastboot_fail("platform not set", response);
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}
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static void getvar_current_slot(char *var_parameter, char *response)
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{
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/* A/B not implemented, for now always return _a */
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fastboot_okay("_a", response);
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}
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static void getvar_slot_suffixes(char *var_parameter, char *response)
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{
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fastboot_okay("_a,_b", response);
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}
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static void getvar_has_slot(char *part_name, char *response)
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{
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if (part_name && (!strcmp(part_name, "boot") ||
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!strcmp(part_name, "system")))
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fastboot_okay("yes", response);
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else
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fastboot_okay("no", response);
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}
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
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static void getvar_partition_type(char *part_name, char *response)
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{
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int r;
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struct blk_desc *dev_desc;
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disk_partition_t part_info;
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r = fastboot_mmc_get_part_info(part_name, &dev_desc, &part_info,
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response);
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if (r >= 0) {
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r = fs_set_blk_dev_with_part(dev_desc, r);
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if (r < 0)
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fastboot_fail("failed to set partition", response);
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else
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fastboot_okay(fs_get_type_name(), response);
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}
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}
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#endif
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
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static void getvar_partition_size(char *part_name, char *response)
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{
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int r;
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size_t size;
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
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struct blk_desc *dev_desc;
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disk_partition_t part_info;
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r = fastboot_mmc_get_part_info(part_name, &dev_desc, &part_info,
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response);
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if (r >= 0)
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size = part_info.size;
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#endif
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#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_NAND)
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struct part_info *part_info;
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r = fastboot_nand_get_part_info(part_name, &part_info, response);
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if (r >= 0)
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size = part_info->size;
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#endif
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if (r >= 0)
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fastboot_response("OKAY", response, "0x%016zx", size);
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}
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#endif
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/**
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* fastboot_getvar() - Writes variable indicated by cmd_parameter to response.
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*
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* @cmd_parameter: Pointer to command parameter
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* @response: Pointer to fastboot response buffer
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*
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* Look up cmd_parameter first as an environment variable of the form
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* fastboot.<cmd_parameter>, if that exists return use its value to set
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* response.
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*
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* Otherwise lookup the name of variable and execute the appropriate
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* function to return the requested value.
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*/
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void fastboot_getvar(char *cmd_parameter, char *response)
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{
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if (!cmd_parameter) {
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fastboot_fail("missing var", response);
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} else {
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#define FASTBOOT_ENV_PREFIX "fastboot."
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int i;
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char *var_parameter = cmd_parameter;
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char envstr[FASTBOOT_RESPONSE_LEN];
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const char *s;
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snprintf(envstr, sizeof(envstr) - 1,
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FASTBOOT_ENV_PREFIX "%s", cmd_parameter);
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s = env_get(envstr);
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if (s) {
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fastboot_response("OKAY", response, "%s", s);
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return;
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}
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strsep(&var_parameter, ":");
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for (i = 0; i < ARRAY_SIZE(getvar_dispatch); ++i) {
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if (!strcmp(getvar_dispatch[i].variable,
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cmd_parameter)) {
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getvar_dispatch[i].dispatch(var_parameter,
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response);
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return;
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}
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}
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pr_warn("WARNING: unknown variable: %s\n", cmd_parameter);
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fastboot_fail("Variable not implemented", response);
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}
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}
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