net: fastboot: Merge AOSP UDP fastboot

Merge UDP fastboot support from AOSP:

  https://android.googlesource.com/platform/external/u-boot/+/android-o-mr1-iot-preview-8

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Signed-off-by: Alex Deymo <deymo@google.com>
Signed-off-by: Jocelyn Bohr <bohr@google.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

include/fastboot-internal.h

@@ -0,0 +1,36 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+
+#ifndef _FASTBOOT_INTERNAL_H_
+#define _FASTBOOT_INTERNAL_H_
+
+/**
+ * fastboot_buf_addr - base address of the fastboot download buffer
+ */
+extern void *fastboot_buf_addr;
+
+/**
+ * fastboot_buf_size - size of the fastboot download buffer
+ */
+extern u32 fastboot_buf_size;
+
+/**
+ * fastboot_progress_callback - callback executed during long operations
+ */
+extern void (*fastboot_progress_callback)(const char *msg);
+
+/**
+ * fastboot_getvar() - Writes variable indicated by cmd_parameter to response.
+ *
+ * @cmd_parameter: Pointer to command parameter
+ * @response: Pointer to fastboot response buffer
+ *
+ * Look up cmd_parameter first as an environment variable of the form
+ * fastboot.<cmd_parameter>, if that exists return use its value to set
+ * response.
+ *
+ * Otherwise lookup the name of variable and execute the appropriate
+ * function to return the requested value.
+ */
+void fastboot_getvar(char *cmd_parameter, char *response);
+
+#endif

include/fastboot.h

@@ -15,8 +15,28 @@
 #define FASTBOOT_VERSION	"0.4"
 
 /* The 64 defined bytes plus \0 */
+#define FASTBOOT_COMMAND_LEN	(64 + 1)
 #define FASTBOOT_RESPONSE_LEN	(64 + 1)
 
+/**
+ * All known commands to fastboot
+ */
+enum {
+	FASTBOOT_COMMAND_GETVAR = 0,
+	FASTBOOT_COMMAND_DOWNLOAD,
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
+	FASTBOOT_COMMAND_FLASH,
+	FASTBOOT_COMMAND_ERASE,
+#endif
+	FASTBOOT_COMMAND_BOOT,
+	FASTBOOT_COMMAND_CONTINUE,
+	FASTBOOT_COMMAND_REBOOT,
+	FASTBOOT_COMMAND_REBOOT_BOOTLOADER,
+	FASTBOOT_COMMAND_SET_ACTIVE,
+
+	FASTBOOT_COMMAND_COUNT
+};
+
 /**
  * fastboot_response() - Writes a response of the form "$tag$reason".
  *
@@ -43,5 +63,89 @@ void fastboot_fail(const char *reason, char *response);
  * @response: Pointer to fastboot response buffer
  */
 void fastboot_okay(const char *reason, char *response);
+
+/**
+ * fastboot_set_reboot_flag() - Set flag to indicate reboot-bootloader
+ *
+ * Set flag which indicates that we should reboot into the bootloader
+ * following the reboot that fastboot executes after this function.
+ *
+ * This function should be overridden in your board file with one
+ * which sets whatever flag your board specific Android bootloader flow
+ * requires in order to re-enter the bootloader.
+ */
 int fastboot_set_reboot_flag(void);
+
+/**
+ * fastboot_set_progress_callback() - set progress callback
+ *
+ * @progress: Pointer to progress callback
+ *
+ * Set a callback which is invoked periodically during long running operations
+ * (flash and erase). This can be used (for example) by the UDP transport to
+ * send INFO responses to keep the client alive whilst those commands are
+ * executing.
+ */
+void fastboot_set_progress_callback(void (*progress)(const char *msg));
+
+/*
+ * fastboot_init() - initialise new fastboot protocol session
+ *
+ * @buf_addr: Pointer to download buffer, or NULL for default
+ * @buf_size: Size of download buffer, or zero for default
+ */
+void fastboot_init(void *buf_addr, u32 buf_size);
+
+/**
+ * fastboot_boot() - Execute fastboot boot command
+ *
+ * If ${fastboot_bootcmd} is set, run that command to execute the boot
+ * process, if that returns, then exit the fastboot server and return
+ * control to the caller.
+ *
+ * Otherwise execute "bootm <fastboot_buf_addr>", if that fails, reset
+ * the board.
+ */
+void fastboot_boot(void);
+
+/**
+ * fastboot_handle_command() - Handle fastboot command
+ *
+ * @cmd_string: Pointer to command string
+ * @response: Pointer to fastboot response buffer
+ *
+ * Return: Executed command, or -1 if not recognized
+ */
+int fastboot_handle_command(char *cmd_string, char *response);
+
+/**
+ * fastboot_data_remaining() - return bytes remaining in current transfer
+ *
+ * Return: Number of bytes left in the current download
+ */
+u32 fastboot_data_remaining(void);
+
+/**
+ * fastboot_data_download() - Copy image data to fastboot_buf_addr.
+ *
+ * @fastboot_data: Pointer to received fastboot data
+ * @fastboot_data_len: Length of received fastboot data
+ * @response: Pointer to fastboot response buffer
+ *
+ * Copies image data from fastboot_data to fastboot_buf_addr. Writes to
+ * response. fastboot_bytes_received is updated to indicate the number
+ * of bytes that have been transferred.
+ */
+void fastboot_data_download(const void *fastboot_data,
+			    unsigned int fastboot_data_len, char *response);
+
+/**
+ * fastboot_data_complete() - Mark current transfer complete
+ *
+ * @response: Pointer to fastboot response buffer
+ *
+ * Set image_size and ${filesize} to the total size of the downloaded image.
+ */
+void fastboot_data_complete(char *response);
+
 #endif /* _FASTBOOT_H_ */

include/fb_mmc.h

@@ -3,6 +3,20 @@
  * Copyright 2014 Broadcom Corporation.
  */
 
+#ifndef _FB_MMC_H_
+#define _FB_MMC_H_
+
+/**
+ * fastboot_mmc_get_part_info() - Lookup eMMC partion by name
+ *
+ * @part_name: Named partition to lookup
+ * @dev_desc: Pointer to returned blk_desc pointer
+ * @part_info: Pointer to returned disk_partition_t
+ * @response: Pointer to fastboot response buffer
+ */
+int fastboot_mmc_get_part_info(char *part_name, struct blk_desc **dev_desc,
+			       disk_partition_t *part_info, char *response);
+
 /**
  * fastboot_mmc_flash_write() - Write image to eMMC for fastboot
  *
@@ -12,8 +26,7 @@
  * @response: Pointer to fastboot response buffer
  */
 void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
-			      unsigned int download_bytes, char *response);
-
+			      u32 download_bytes, char *response);
 /**
  * fastboot_mmc_flash_erase() - Erase eMMC for fastboot
  *
@@ -21,3 +34,4 @@ void fastboot_mmc_flash_write(const char *cmd, void *download_buffer,
  * @response: Pointer to fastboot response buffer
  */
 void fastboot_mmc_erase(const char *cmd, char *response);
+#endif

include/fb_nand.h

@@ -4,6 +4,21 @@
  * Copyright 2015 Free Electrons.
  */
 
+#ifndef _FB_NAND_H_
+#define _FB_NAND_H_
+
+#include <jffs2/load_kernel.h>
+
+/**
+ * fastboot_nand_get_part_info() - Lookup NAND partion by name
+ *
+ * @part_name: Named device to lookup
+ * @part_info: Pointer to returned part_info pointer
+ * @response: Pointer to fastboot response buffer
+ */
+int fastboot_nand_get_part_info(char *part_name, struct part_info **part_info,
+				char *response);
+
 /**
  * fastboot_nand_flash_write() - Write image to NAND for fastboot
  *
@@ -13,7 +28,8 @@
  * @response: Pointer to fastboot response buffer
  */
 void fastboot_nand_flash_write(const char *cmd, void *download_buffer,
-			       unsigned int download_bytes, char *response);
+			       u32 download_bytes, char *response);
+
 /**
  * fastboot_nand_flash_erase() - Erase NAND for fastboot
  *
@@ -21,3 +37,4 @@ void fastboot_nand_flash_write(const char *cmd, void *download_buffer,
  * @response: Pointer to fastboot response buffer
  */
 void fastboot_nand_erase(const char *cmd, char *response);
+#endif

include/net.h

@@ -535,7 +535,7 @@ extern int		net_restart_wrap;	/* Tried all network devices */
 
 enum proto_t {
 	BOOTP, RARP, ARP, TFTPGET, DHCP, PING, DNS, NFS, CDP, NETCONS, SNTP,
-	TFTPSRV, TFTPPUT, LINKLOCAL
+	TFTPSRV, TFTPPUT, LINKLOCAL, FASTBOOT
 };
 
 extern char	net_boot_file_name[1024];/* Boot File name */

include/net/fastboot.h

@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (C) 2016 The Android Open Source Project
+ */
+
+#ifndef __NET_FASTBOOT_H__
+#define __NET_FASTBOOT_H__
+
+/**********************************************************************/
+/*
+ *	Global functions and variables.
+ */
+
+/**
+ * Wait for incoming fastboot comands.
+ */
+void fastboot_start_server(void);
+
+/**********************************************************************/
+
+#endif /* __NET_FASTBOOT_H__ */