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mtd: msm_qpic_nand: Add boot_a and boot_b access to APPS

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The existing code logic, checks for partitions that have
access to apps by name "boot". This logic may not work
if the boot partition name changes, let's say as boot_a/b.

So, get the active boot partition details by reading the
new kernel command line parameter "part.activeboot=" and
use this partition page offset address to read the ONFI
parameter page. If active boot partition details are
not found, fallback to legacy code.

Change-Id: I7c7071ccfc687f2e03bd9209a3c7260fb131ff10
Signed-off-by: Pradeep P V K <quic_pragalla@quicinc.com>
This commit is contained in:
Pradeep P V K 2023-04-18 17:37:13 +05:30
commit eba92f48be
1 changed files with 24 additions and 7 deletions
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31
drivers/mtd/devices/msm_qpic_nand.c
View file

@ -19,8 +19,24 @@
#define SMEM_AARM_PARTITION_TABLE 9
#define SMEM_APPS 0
#define ONE_CODEWORD_SIZE 516
#define ACTIVE_BOOT_PART_MAX 30
static struct device *dev_node;
static char active_boot_part[ACTIVE_BOOT_PART_MAX] = "boot";
/*
* Function to get the active boot partition information
* from kernel command line during system boot.
*/
#ifndef MODULE
static int __init get_active_boot_part(char *str)
{
strlcpy(active_boot_part, str, ACTIVE_BOOT_PART_MAX);
return 0;
}
__setup("part.activeboot=", get_active_boot_part);
#endif
/*
* Get the DMA memory for requested amount of size. It returns the pointer
@ -798,24 +814,25 @@ static int msm_nand_flash_onfi_probe(struct msm_nand_info *info)
memset(&data, 0, sizeof(struct msm_nand_flash_onfi_data));
/*
* Lookup the partition to which apps has access to
* As a part of FR53657, add support for boot_a
* and boot_b partitions.
/* Lookup the partition to which apps has access to
*
* active_boot_part value gets updated to either kernel command line
* parameter "part.activeboot=" value (if present) or hold the default
* "boot" value.
*/
for (i = 0; i < FLASH_PTABLE_MAX_PARTS_V4; i++) {
if (mtd_part[i].name && (!strcmp("boot", mtd_part[i].name) ||
!strcmp("boot_a", mtd_part[i].name) ||
!strcmp("boot_b", mtd_part[i].name))) {
if (mtd_part[i].name && !strcmp(active_boot_part, mtd_part[i].name)) {
page_address = mtd_part[i].offset << 6;
break;
}
}
if (!page_address) {
pr_err("%s: no apps partition found in smem\n", __func__);
ret = -EPERM;
goto free_dma;
}
data.cfg.cmd = MSM_NAND_CMD_PAGE_READ_ONFI;
data.exec = 1;
data.cfg.addr0 = (page_address << 16) |