Add BMC/Flash firmware write support

kestrel/src/flash_filesystem.c

@@ -12,14 +12,19 @@ LOG_MODULE_REGISTER(flash_filesystem, LOG_LEVEL_DBG);
 #include <ctype.h>
 #include <zephyr.h>
 #include <device.h>
+#include <sys/crc.h>
 #include <fs/fs.h>
 #include <fs/littlefs.h>
+#include <drivers/flash.h>
 #include <storage/flash_map.h>
 
 #define WITH_ZEPHYR 1
 
 #include "kestrel.h"
 
+extern const struct flash_area *flash_map;
+extern const int flash_map_entries;
+
 // Matches LFS_NAME_MAX */
 #define MAX_PATH_LEN 255
 
@@ -103,3 +108,52 @@ fail:
 
 	return -1;
 }
+
+int write_firmware_to_flash(const char* device_name, int partition_number, const uint8_t* data, size_t length, int add_litex_header)
+{
+	static struct flash_area const *flash_area;
+	int result;
+
+	// Find BMC firmware Flash map area
+	flash_area = NULL;
+	for (int i = 0; i < flash_map_entries; i++) {
+		if (strcmp(flash_map[i].fa_dev_name, "bmc") == 0) {
+			if (flash_map[i].fa_id == partition_number) {
+				flash_area = &flash_map[i];
+				break;
+			}
+		}
+	}
+	if (!flash_area) {
+		return -ENODEV;
+	}
+
+	if (length > flash_area->fa_size) {
+		length = flash_area->fa_size;
+	}
+
+	LOG_INF("Erasing %s firmware partition %d...", device_name, partition_number);
+	result = flash_area_erase(flash_area, 0x0, flash_area->fa_size);
+	if (result < 0) {
+		LOG_INF("Erase failed!");
+		return result;
+	}
+
+	LOG_INF("Writing %s firmware partition %d...", device_name, partition_number);
+	if (add_litex_header) {
+		result = flash_area_write(flash_area, 0x0, &length, 4);
+		if (!result) {
+			uint32_t crc = crc32_ieee(data, length);
+			result = flash_area_write(flash_area, 0x4, &crc, 4);
+		}
+	}
+	if (!result) {
+		result = flash_area_write(flash_area, (add_litex_header)?0x8:0x0, data, length);
+	}
+	if (result < 0) {
+		LOG_INF("Write failed!");
+		return result;
+	}
+
+	return 0;
+}
\ No newline at end of file

kestrel/src/flash_filesystem.h

@@ -8,4 +8,6 @@
 
 int initialize_flash_filesystem(void);
 
+int write_firmware_to_flash(const char* device_name, int partition_number, const uint8_t* data, size_t length, int add_litex_header);
+
 #endif // _FLASH_FILESYSTEM_H
\ No newline at end of file

kestrel/src/shell.c

@@ -12,6 +12,7 @@
 #define WITH_ZEPHYR 1
 
 #include "kestrel.h"
+#include "flash_filesystem.h"
 
 #define KESTREL_CONSOLE_THREAD_PRIORITY	K_PRIO_PREEMPT(CONFIG_NUM_PREEMPT_PRIORITIES - 1)
 static K_THREAD_STACK_DEFINE(kestrel_console_thread_stack, 16384);
@@ -94,7 +95,7 @@ static void print_kestrel_utility_command_usage(const struct shell *shell, char*
 }
 
 static void print_kestrel_reflash_command_usage(const struct shell *shell, char* command_name) {
-	shell_print(shell, "Usage: %s <pnor>", command_name);
+	shell_print(shell, "Usage: %s <fpga bmc pnor>", command_name);
 }
 
 static void print_kestrel_memdump_command_usage(const struct shell *shell, char* command_name) {
@@ -138,6 +139,12 @@ static int kestrel_shell_cmd_reflash(const struct shell *shell, size_t argc, cha
 
 		return write_flash_buffer_to_flash();
 	}
+	else if (strcmp(argv[1], "bmc") == 0) {
+		return write_firmware_to_flash("bmc", 1, main_firmware_buffer.buffer_address, main_firmware_buffer.valid_bytes, 1);
+	}
+	else if (strcmp(argv[1], "fpga") == 0) {
+		return write_firmware_to_flash("bmc", 0, main_firmware_buffer.buffer_address, main_firmware_buffer.valid_bytes, 0);
+	}
 	else {
 		shell_print(shell, "%s: Invalid parameter", argv[0]);
 		print_kestrel_reflash_command_usage(shell, argv[0]);

kestrel/src/webservice.c

@@ -152,7 +152,7 @@ int firmware_upload_form_handler(struct mg_connection *conn, void *cbdata)
 	          "enctype=\"multipart/form-data\">\n",
 	          (const char *)cbdata);
 	mg_printf(conn, "<input type=\"file\" name=\"firmwarefile\" multiple>\n");
-	mg_printf(conn, "<input type=\"submit\" value=\"Submit\">\n");
+	mg_printf(conn, "<input type=\"submit\" value=\"Upload\">\n");
 	mg_printf(conn, "</form>\n");
 
 	SEND_STANDARD_FOOTER(conn);
@@ -213,6 +213,9 @@ int firmware_upload_handler(struct mg_connection *conn, void *cbdata)
 	/* Call the form handler */
 	ret = mg_handle_form_request(conn, &fdh);
 
+	// Clear out the remainder of the buffer
+	memset(main_firmware_buffer.buffer_address + main_firmware_buffer.valid_bytes, 0xff, main_firmware_buffer.buffer_length - main_firmware_buffer.valid_bytes);
+
 	main_firmware_buffer.locked = 0;
 
 	mg_printf(conn,