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board: ti: common: Add support for dynamic dfu_alt_info 

Add support for setting dfu_alt_info environment variable
dynamically for SPI flash devices, the dfu_alt_info is populated
from existing mtd partitions, there is no modification made
to the environment variable if it already is defined.

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
This commit is contained in:
Vaishnav Achath 2023-07-13 00:45:24 +05:30 committed by Udit Kumar
parent 11ca97f710
commit 63d23445ab
2 changed files with 78 additions and 0 deletions
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1
board/ti/common/Makefile
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@ -3,3 +3,4 @@
obj-${CONFIG_TI_I2C_BOARD_DETECT} += board_detect.o
obj-${CONFIG_CMD_EXTENSION} += cape_detect.o
obj-$(CONFIG_SET_DFU_ALT_INFO) += k3_dfu.o

77
board/ti/common/k3_dfu.c Normal file
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@ -0,0 +1,77 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2023, Texas Instruments Incorporated - https://www.ti.com/
*/
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <dfu.h>
#include <env.h>
#include <memalign.h>
#include <misc.h>
#include <mtd.h>
#include <mtd_node.h>
#define DFU_ALT_BUF_LEN 512
static void board_get_alt_info_sf(struct mtd_info *mtd, char *buf)
{
struct mtd_info *part;
bool first = true;
const char *name;
int len;
name = mtd->name;
len = strlen(buf);
list_for_each_entry(part, &mtd->partitions, node) {
if (!first)
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len, "; ");
first = false;
len += snprintf(buf + len, DFU_ALT_BUF_LEN - len,
"%s raw %llx %llx", part->name, part->offset, part->size);
}
}
void set_dfu_alt_info(char *interface, char *devstr)
{
struct udevice *dev;
struct mtd_info *mtd;
char *st, *devstr_bkup;
unsigned int bus;
ALLOC_CACHE_ALIGN_BUFFER(char, buf, DFU_ALT_BUF_LEN);
if (env_get("dfu_alt_info"))
return;
memset(buf, 0, sizeof(buf));
if (!strcmp(interface, "sf")) {
devstr_bkup = strdup(devstr);
st = strsep(&devstr_bkup, ":");
if (!st || !*st) {
printf("Invalid SPI bus %s\n", st);
return;
}
bus = simple_strtoul(st, NULL, 0);
if (uclass_get_device(UCLASS_SPI_FLASH, bus, &dev)) {
printf("Failed to get device on bus %d\n", bus);
return;
}
if (CONFIG_IS_ENABLED(MTD)) {
mtd_probe_devices();
mtd_for_each_device(mtd) {
if (!mtd_is_partition(mtd) && mtd->dev && dev == mtd->dev)
board_get_alt_info_sf(mtd, buf);
}
}
} else {
printf("dynamic dfu_alt_info supported only for sf\n");
return;
}
env_set("dfu_alt_info", buf);
}