Get the boot device storage type by reading it from kernel command line arguments and export the same information to ufs modules. Signed-off-by: Chetan C R <quic_cchinnad@xxxxxxxxxxx> --- drivers/ufs/host/Makefile | 1 + drivers/ufs/host/ufs-cmdline.c | 54 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 55 insertions(+) create mode 100644 drivers/ufs/host/ufs-cmdline.c diff --git a/drivers/ufs/host/Makefile b/drivers/ufs/host/Makefile index e4be542..0bac3b1 100644 --- a/drivers/ufs/host/Makefile +++ b/drivers/ufs/host/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_SCSI_UFS_CDNS_PLATFORM) += cdns-pltfrm.o obj-$(CONFIG_SCSI_UFS_QCOM) += ufs_qcom.o ufs_qcom-y += ufs-qcom.o ufs_qcom-$(CONFIG_SCSI_UFS_CRYPTO) += ufs-qcom-ice.o +obj-y += ufs-cmdline.o obj-$(CONFIG_SCSI_UFS_EXYNOS) += ufs-exynos.o obj-$(CONFIG_SCSI_UFSHCD_PCI) += ufshcd-pci.o obj-$(CONFIG_SCSI_UFSHCD_PLATFORM) += ufshcd-pltfrm.o diff --git a/drivers/ufs/host/ufs-cmdline.c b/drivers/ufs/host/ufs-cmdline.c new file mode 100644 index 0000000..408755c --- /dev/null +++ b/drivers/ufs/host/ufs-cmdline.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2022, The Linux Foundation. All rights reserved. + */ + +#include <linux/init.h> +#include <linux/printk.h> +#include <linux/string.h> + +#ifdef CONFIG_BOOT_CONFIG +#include <linux/bootconfig.h> +#endif + +#define ANDROID_BOOT_DEV_MAX_V3 30 + +static char android_boot_dev_v3[ANDROID_BOOT_DEV_MAX_V3]; +static const char *android_boot_dev_v4; + +const char *get_storage_boot_device(void) +{ + if (android_boot_dev_v4 && strlen(android_boot_dev_v4)) + return android_boot_dev_v4; + + else if (strlen(android_boot_dev_v3)) + return android_boot_dev_v3; + + pr_err("Not able to get Bootconfig or Kernel command line param\n"); + return NULL; +}; +EXPORT_SYMBOL_GPL(get_storage_boot_device); + +/* boot image header version 3 android boot device type */ +static int __init get_android_boot_dev_v3(char *str) +{ + strscpy(android_boot_dev_v3, str, ANDROID_BOOT_DEV_MAX_V3); + return 1; +} +__setup("androidboot.bootdevice=", get_android_boot_dev_v3); + +#ifdef CONFIG_BOOT_CONFIG +/* boot image header version 4 android boot device type */ +static int __init get_android_boot_dev_v4(void) +{ + struct xbc_node *vnode = NULL; + + android_boot_dev_v4 = xbc_find_value("androidboot.bootdevice", &vnode); + + if (vnode && xbc_node_is_array(vnode)) + xbc_array_for_each_value(vnode, android_boot_dev_v4); + + return 0; +} +fs_initcall(get_android_boot_dev_v4); +#endif -- 2.7.4