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https://github.com/brain-hackers/u-boot-brain
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939ba160aa
Move the stm32mp1 common code board_get_mtdparts() in common directory, this patch reduce the maintenance effort on this generic part (not board dependent). Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com> Reviewed-by: Patrice Chotard <patrice.chotard@st.com>
116 lines
2.7 KiB
C
116 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0+ OR BSD-3-Clause
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/*
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* Copyright (C) 2020, STMicroelectronics - All Rights Reserved
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*/
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#include <common.h>
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#include <dm.h>
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#include <env.h>
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#include <env_internal.h>
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#include <mtd.h>
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#include <mtd_node.h>
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#define MTDPARTS_LEN 256
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#define MTDIDS_LEN 128
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/*
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* Get a global data pointer
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*/
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* The mtdparts_nand0 and mtdparts_nor0 variable tends to be long.
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* If we need to access it before the env is relocated, then we need
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* to use our own stack buffer. gd->env_buf will be too small.
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*
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* @param buf temporary buffer pointer MTDPARTS_LEN long
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* @return mtdparts variable string, NULL if not found
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*/
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static const char *env_get_mtdparts(const char *str, char *buf)
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{
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if (gd->flags & GD_FLG_ENV_READY)
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return env_get(str);
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if (env_get_f(str, buf, MTDPARTS_LEN) != -1)
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return buf;
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return NULL;
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}
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/**
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* update the variables "mtdids" and "mtdparts" with content of mtdparts_<dev>
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*/
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static void board_get_mtdparts(const char *dev,
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char *mtdids,
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char *mtdparts)
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{
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char env_name[32] = "mtdparts_";
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char tmp_mtdparts[MTDPARTS_LEN];
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const char *tmp;
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/* name of env variable to read = mtdparts_<dev> */
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strcat(env_name, dev);
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tmp = env_get_mtdparts(env_name, tmp_mtdparts);
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if (tmp) {
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/* mtdids: "<dev>=<dev>, ...." */
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if (mtdids[0] != '\0')
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strcat(mtdids, ",");
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strcat(mtdids, dev);
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strcat(mtdids, "=");
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strcat(mtdids, dev);
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/* mtdparts: "mtdparts=<dev>:<mtdparts_<dev>>;..." */
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if (mtdparts[0] != '\0')
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strncat(mtdparts, ";", MTDPARTS_LEN);
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else
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strcat(mtdparts, "mtdparts=");
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strncat(mtdparts, dev, MTDPARTS_LEN);
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strncat(mtdparts, ":", MTDPARTS_LEN);
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strncat(mtdparts, tmp, MTDPARTS_LEN);
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}
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}
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void board_mtdparts_default(const char **mtdids, const char **mtdparts)
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{
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struct mtd_info *mtd;
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struct udevice *dev;
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static char parts[3 * MTDPARTS_LEN + 1];
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static char ids[MTDIDS_LEN + 1];
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static bool mtd_initialized;
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if (mtd_initialized) {
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*mtdids = ids;
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*mtdparts = parts;
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return;
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}
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memset(parts, 0, sizeof(parts));
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memset(ids, 0, sizeof(ids));
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/* probe all MTD devices */
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for (uclass_first_device(UCLASS_MTD, &dev);
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dev;
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uclass_next_device(&dev)) {
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pr_debug("mtd device = %s\n", dev->name);
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}
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mtd = get_mtd_device_nm("nand0");
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if (!IS_ERR_OR_NULL(mtd)) {
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board_get_mtdparts("nand0", ids, parts);
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put_mtd_device(mtd);
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}
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mtd = get_mtd_device_nm("spi-nand0");
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if (!IS_ERR_OR_NULL(mtd)) {
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board_get_mtdparts("spi-nand0", ids, parts);
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put_mtd_device(mtd);
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}
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if (!uclass_get_device(UCLASS_SPI_FLASH, 0, &dev))
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board_get_mtdparts("nor0", ids, parts);
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mtd_initialized = true;
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*mtdids = ids;
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*mtdparts = parts;
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debug("%s:mtdids=%s & mtdparts=%s\n", __func__, ids, parts);
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}
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