[PATCH V2 20/26] imx: dynamic setting mmcdev and mmcroot

[Peng Fan (OSS)]

From: Peng Fan <peng....@nxp.com>

Dynamic setting mmcdev and mmcroot.
Then when boot linux, we can have correct "root=/dev/mmcblk[x]p2"

Signed-off-by: Peng Fan <peng....@nxp.com>
---
 arch/arm/include/asm/mach-imx/sys_proto.h |  2 +
 board/freescale/common/Makefile           |  3 ++
 board/freescale/common/mmc.c              | 49 +++++++++++++++++++++++
 3 files changed, 54 insertions(+)
 create mode 100644 board/freescale/common/mmc.c

diff --git a/arch/arm/include/asm/mach-imx/sys_proto.h 
b/arch/arm/include/asm/mach-imx/sys_proto.h
index 0c0c7814fb2..37fd427cc00 100644
--- a/arch/arm/include/asm/mach-imx/sys_proto.h
+++ b/arch/arm/include/asm/mach-imx/sys_proto.h
@@ -228,6 +228,8 @@ int mxs_reset_block(struct mxs_register_32 *reg);
 int mxs_wait_mask_set(struct mxs_register_32 *reg, u32 mask, u32 timeout);
 int mxs_wait_mask_clr(struct mxs_register_32 *reg, u32 mask, u32 timeout);
 
+void board_late_mmc_env_init(void);
+
 unsigned long call_imx_sip(unsigned long id, unsigned long reg0,
                           unsigned long reg1, unsigned long reg2,
                           unsigned long reg3);
diff --git a/board/freescale/common/Makefile b/board/freescale/common/Makefile
index f13965daf2e..4df484935f4 100644
--- a/board/freescale/common/Makefile
+++ b/board/freescale/common/Makefile
@@ -63,6 +63,9 @@ obj-$(CONFIG_ZM7300)          += zm7300.o
 obj-$(CONFIG_POWER_PFUZE100)   += pfuze.o
 obj-$(CONFIG_DM_PMIC_PFUZE100) += pfuze.o
 obj-$(CONFIG_POWER_MC34VR500)  += mc34vr500.o
+ifneq (,$(filter $(SOC), imx8ulp))
+obj-y                          += mmc.o
+endif
 
 obj-$(CONFIG_LS102XA_STREAM_ID)        += ls102xa_stream_id.o
 
diff --git a/board/freescale/common/mmc.c b/board/freescale/common/mmc.c
new file mode 100644
index 00000000000..8cd5079f962
--- /dev/null
+++ b/board/freescale/common/mmc.c
@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2016 Freescale Semiconductor, Inc.
+ * Copyright 2018-2022 NXP
+ */
+
+#include <common.h>
+#include <command.h>
+#include <asm/arch/sys_proto.h>
+#include <linux/errno.h>
+#include <asm/io.h>
+#include <stdbool.h>
+#include <mmc.h>
+#include <env.h>
+
+static int check_mmc_autodetect(void)
+{
+       char *autodetect_str = env_get("mmcautodetect");
+
+       if (autodetect_str && !strcmp(autodetect_str, "yes"))
+               return 1;
+
+       return 0;
+}
+
+/* This should be defined for each board */
+__weak int mmc_map_to_kernel_blk(int dev_no)
+{
+       return dev_no;
+}
+
+void board_late_mmc_env_init(void)
+{
+       char cmd[32];
+       char mmcblk[32];
+       u32 dev_no = mmc_get_env_dev();
+
+       if (!check_mmc_autodetect())
+               return;
+
+       env_set_ulong("mmcdev", dev_no);
+
+       /* Set mmcblk env */
+       sprintf(mmcblk, "/dev/mmcblk%dp2 rootwait rw", 
mmc_map_to_kernel_blk(dev_no));
+       env_set("mmcroot", mmcblk);
+
+       sprintf(cmd, "mmc dev %d", dev_no);
+       run_command(cmd, 0);
+}
-- 
2.35.1