[PATCH 03/10] stm32mp: stm32prog: add support of initrd in flashlayout

[Patrick Delaunay]

Add the support in command stm32prog of kernel load and start
with initrd file, identify by the partition Type "Binary" in
the flashlayout.tsv, for example:

- 0x01 fsbl	Binary none 0x0 tfa.stm32
- 0x03 fip	Binary none 0x0 fip.bin
P 0x10 kernel System ram0 0xC2000000 uImage.bin
P 0x11 dtb FileSystem ram0 0xC4000000 board.dtb
P 0x12 initrd Binary ram0 0xC4400000 <initrd>

The <initrd> file can be a legacy image "uInitrd", generated
with mkimage, or a RAW initrd image "initrd.gz".

After a DFU detach the bootm command with be executed
with the associated address, for example:

$> bootm 0xC2000000 0xC4400000:<size> 0xC4000000

When the "Binary" partition type is absent, the 'bootm'
command starts the kernel without ramdisk, for example:

$> bootm 0xC2000000 - 0xC4000000

With this paths, it is no more mandatory to generate FIT
including the kernel, DT and initrd:

- 0x01 fsbl Binary none 0x0 tfa.stm32
- 0x03 fip Binary none 0x0 fip.bin
P 0x10 fit System ram0 0xC2000000 fit.bin

Signed-off-by: Patrick Delaunay <patrick.delaunay at foss.st.com>
---

 .../cmd_stm32prog/cmd_stm32prog.c             | 22 +++++++++++++------
 .../mach-stm32mp/cmd_stm32prog/stm32prog.c    | 10 ++++++---
 .../mach-stm32mp/cmd_stm32prog/stm32prog.h    |  2 ++
 3 files changed, 24 insertions(+), 10 deletions(-)

diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/cmd_stm32prog.c b/arch/arm/mach-stm32mp/cmd_stm32prog/cmd_stm32prog.c
index e36501a86b..e584bb52bd 100644
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/cmd_stm32prog.c
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/cmd_stm32prog.c
@@ -45,7 +45,6 @@ static int do_stm32prog(struct cmd_tbl *cmdtp, int flag, int argc,
 	bool reset = false;
 	struct image_header_s header;
 	struct stm32prog_data *data;
-	u32 uimage, dtb;
 
 	if (argc < 3 ||  argc > 5)
 		return CMD_RET_USAGE;
@@ -119,21 +118,23 @@ static int do_stm32prog(struct cmd_tbl *cmdtp, int flag, int argc,
 		goto cleanup;
 	}
 
-	uimage = data->uimage;
-	dtb = data->dtb;
-
 	stm32prog_clean(data);
 	free(stm32prog_data);
 	stm32prog_data = NULL;
 
 	puts("Download done\n");
 
-	if (uimage) {
+	if (data->uimage) {
 		char boot_addr_start[20];
 		char dtb_addr[20];
+		char initrd_addr[40];
 		char *bootm_argv[5] = {
 			"bootm", boot_addr_start, "-", dtb_addr, NULL
 		};
+		u32 uimage = data->uimage;
+		u32 dtb = data->dtb;
+		u32 initrd = data->initrd;
+
 		if (!dtb)
 			bootm_argv[3] = env_get("fdtcontroladdr");
 		else
@@ -142,8 +143,15 @@ static int do_stm32prog(struct cmd_tbl *cmdtp, int flag, int argc,
 
 		snprintf(boot_addr_start, sizeof(boot_addr_start) - 1,
 			 "0x%x", uimage);
-		printf("Booting kernel at %s - %s...\n\n\n",
-		       boot_addr_start, bootm_argv[3]);
+
+		if (initrd) {
+			snprintf(initrd_addr, sizeof(initrd_addr) - 1, "0x%x:0x%x",
+				 initrd, data->initrd_size);
+			bootm_argv[2] = initrd_addr;
+		}
+
+		printf("Booting kernel at %s %s %s...\n\n\n",
+		       boot_addr_start, bootm_argv[2], bootm_argv[3]);
 		/* Try bootm for legacy and FIT format image */
 		if (genimg_get_format((void *)uimage) != IMAGE_FORMAT_INVALID)
 			do_bootm(cmdtp, 0, 4, bootm_argv);
diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
index 84b880261a..ea69d5dd16 100644
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.c
@@ -1473,7 +1473,7 @@ error:
 	return ret;
 }
 
-static void stm32prog_end_phase(struct stm32prog_data *data)
+static void stm32prog_end_phase(struct stm32prog_data *data, u64 offset)
 {
 	if (data->phase == PHASE_FLASHLAYOUT) {
 		if (parse_flash_layout(data, STM32_DDR_BASE, 0))
@@ -1489,6 +1489,10 @@ static void stm32prog_end_phase(struct stm32prog_data *data)
 			data->uimage = data->cur_part->addr;
 		if (data->cur_part->part_type == PART_FILESYSTEM)
 			data->dtb = data->cur_part->addr;
+		if (data->cur_part->part_type == PART_BINARY) {
+			data->initrd = data->cur_part->addr;
+			data->initrd_size = offset;
+		}
 	}
 
 	if (CONFIG_IS_ENABLED(MMC) &&
@@ -1747,7 +1751,7 @@ void dfu_flush_callback(struct dfu_entity *dfu)
 	if (dfu->dev_type == DFU_DEV_RAM) {
 		if (dfu->alt == 0 &&
 		    stm32prog_data->phase == PHASE_FLASHLAYOUT) {
-			stm32prog_end_phase(stm32prog_data);
+			stm32prog_end_phase(stm32prog_data, dfu->offset);
 			/* waiting DFU DETACH for reenumeration */
 		}
 	}
@@ -1756,7 +1760,7 @@ void dfu_flush_callback(struct dfu_entity *dfu)
 		return;
 
 	if (dfu->alt == stm32prog_data->cur_part->alt_id) {
-		stm32prog_end_phase(stm32prog_data);
+		stm32prog_end_phase(stm32prog_data, dfu->offset);
 		stm32prog_next_phase(stm32prog_data);
 	}
 }
diff --git a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
index ad404879a7..efb51a3022 100644
--- a/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
+++ b/arch/arm/mach-stm32mp/cmd_stm32prog/stm32prog.h
@@ -142,6 +142,8 @@ struct stm32prog_data {
 	/* bootm information */
 	u32	uimage;
 	u32	dtb;
+	u32	initrd;
+	u32	initrd_size;
 };
 
 extern struct stm32prog_data *stm32prog_data;
-- 
2.17.1