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>

1 files changed, 302 insertions, 0 deletions

diff --git a/drivers/fastboot/fb_command.c b/drivers/fastboot/fb_command.c
new file mode 100644
index 0000000000..af4f500694
--- /dev/null
+++ b/drivers/fastboot/fb_command.c
@@ -0,0 +1,302 @@
+// SPDX-License-Identifier: BSD-2-Clause
+/*
+ * Copyright (C) 2016 The Android Open Source Project
+ */
+
+#include <common.h>
+#include <fastboot.h>
+#include <fastboot-internal.h>
+#include <fb_mmc.h>
+#include <fb_nand.h>
+#include <part.h>
+#include <stdlib.h>
+
+/**
+ * image_size - final fastboot image size
+ */
+static u32 image_size;
+
+/**
+ * fastboot_bytes_received - number of bytes received in the current download
+ */
+static u32 fastboot_bytes_received;
+
+/**
+ * fastboot_bytes_expected - number of bytes expected in the current download
+ */
+static u32 fastboot_bytes_expected;
+
+static void okay(char *, char *);
+static void getvar(char *, char *);
+static void download(char *, char *);
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
+static void flash(char *, char *);
+static void erase(char *, char *);
+#endif
+static void reboot_bootloader(char *, char *);
+
+static const struct {
+	const char *command;
+	void (*dispatch)(char *cmd_parameter, char *response);
+} commands[FASTBOOT_COMMAND_COUNT] = {
+	[FASTBOOT_COMMAND_GETVAR] = {
+		.command = "getvar",
+		.dispatch = getvar
+	},
+	[FASTBOOT_COMMAND_DOWNLOAD] = {
+		.command = "download",
+		.dispatch = download
+	},
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
+	[FASTBOOT_COMMAND_FLASH] =  {
+		.command = "flash",
+		.dispatch = flash
+	},
+	[FASTBOOT_COMMAND_ERASE] =  {
+		.command = "erase",
+		.dispatch = erase
+	},
+#endif
+	[FASTBOOT_COMMAND_BOOT] =  {
+		.command = "boot",
+		.dispatch = okay
+	},
+	[FASTBOOT_COMMAND_CONTINUE] =  {
+		.command = "continue",
+		.dispatch = okay
+	},
+	[FASTBOOT_COMMAND_REBOOT] =  {
+		.command = "reboot",
+		.dispatch = okay
+	},
+	[FASTBOOT_COMMAND_REBOOT_BOOTLOADER] =  {
+		.command = "reboot-bootloader",
+		.dispatch = reboot_bootloader
+	},
+	[FASTBOOT_COMMAND_SET_ACTIVE] =  {
+		.command = "set_active",
+		.dispatch = okay
+	},
+};
+
+/**
+ * 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)
+{
+	int i;
+	char *cmd_parameter;
+
+	cmd_parameter = cmd_string;
+	strsep(&cmd_parameter, ":");
+
+	for (i = 0; i < FASTBOOT_COMMAND_COUNT; i++) {
+		if (!strcmp(commands[i].command, cmd_string)) {
+			if (commands[i].dispatch) {
+				commands[i].dispatch(cmd_parameter,
+							response);
+				return i;
+			} else {
+				break;
+			}
+		}
+	}
+
+	pr_err("command %s not recognized.\n", cmd_string);
+	fastboot_fail("unrecognized command", response);
+	return -1;
+}
+
+/**
+ * okay() - Send bare OKAY response
+ *
+ * @cmd_parameter: Pointer to command parameter
+ * @response: Pointer to fastboot response buffer
+ *
+ * Send a bare OKAY fastboot response. This is used where the command is
+ * valid, but all the work is done after the response has been sent (e.g.
+ * boot, reboot etc.)
+ */
+static void okay(char *cmd_parameter, char *response)
+{
+	fastboot_okay(NULL, response);
+}
+
+/**
+ * getvar() - Read a config/version variable
+ *
+ * @cmd_parameter: Pointer to command parameter
+ * @response: Pointer to fastboot response buffer
+ */
+static void getvar(char *cmd_parameter, char *response)
+{
+	fastboot_getvar(cmd_parameter, response);
+}
+
+/**
+ * fastboot_download() - Start a download transfer from the client
+ *
+ * @cmd_parameter: Pointer to command parameter
+ * @response: Pointer to fastboot response buffer
+ */
+static void download(char *cmd_parameter, char *response)
+{
+	char *tmp;
+
+	if (!cmd_parameter) {
+		fastboot_fail("Expected command parameter", response);
+		return;
+	}
+	fastboot_bytes_received = 0;
+	fastboot_bytes_expected = simple_strtoul(cmd_parameter, &tmp, 16);
+	if (fastboot_bytes_expected == 0) {
+		fastboot_fail("Expected nonzero image size", response);
+		return;
+	}
+	/*
+	 * Nothing to download yet. Response is of the form:
+	 * [DATA|FAIL]$cmd_parameter
+	 *
+	 * where cmd_parameter is an 8 digit hexadecimal number
+	 */
+	if (fastboot_bytes_expected > fastboot_buf_size) {
+		fastboot_fail(cmd_parameter, response);
+	} else {
+		printf("Starting download of %d bytes\n",
+		       fastboot_bytes_expected);
+		fastboot_response("DATA", response, "%s", cmd_parameter);
+	}
+}
+
+/**
+ * fastboot_data_remaining() - return bytes remaining in current transfer
+ *
+ * Return: Number of bytes left in the current download
+ */
+u32 fastboot_data_remaining(void)
+{
+	return fastboot_bytes_expected - fastboot_bytes_received;
+}
+
+/**
+ * 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.
+ *
+ * On completion sets image_size and ${filesize} to the total size of the
+ * downloaded image.
+ */
+void fastboot_data_download(const void *fastboot_data,
+			    unsigned int fastboot_data_len,
+			    char *response)
+{
+#define BYTES_PER_DOT	0x20000
+	u32 pre_dot_num, now_dot_num;
+
+	if (fastboot_data_len == 0 ||
+	    (fastboot_bytes_received + fastboot_data_len) >
+	    fastboot_bytes_expected) {
+		fastboot_fail("Received invalid data length",
+			      response);
+		return;
+	}
+	/* Download data to fastboot_buf_addr */
+	memcpy(fastboot_buf_addr + fastboot_bytes_received,
+	       fastboot_data, fastboot_data_len);
+
+	pre_dot_num = fastboot_bytes_received / BYTES_PER_DOT;
+	fastboot_bytes_received += fastboot_data_len;
+	now_dot_num = fastboot_bytes_received / BYTES_PER_DOT;
+
+	if (pre_dot_num != now_dot_num) {
+		putc('.');
+		if (!(now_dot_num % 74))
+			putc('\n');
+	}
+	*response = '\0';
+}
+
+/**
+ * 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)
+{
+	/* Download complete. Respond with "OKAY" */
+	fastboot_okay(NULL, response);
+	printf("\ndownloading of %d bytes finished\n", fastboot_bytes_received);
+	image_size = fastboot_bytes_received;
+	env_set_hex("filesize", image_size);
+	fastboot_bytes_expected = 0;
+	fastboot_bytes_received = 0;
+}
+
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH)
+/**
+ * flash() - write the downloaded image to the indicated partition.
+ *
+ * @cmd_parameter: Pointer to partition name
+ * @response: Pointer to fastboot response buffer
+ *
+ * Writes the previously downloaded image to the partition indicated by
+ * cmd_parameter. Writes to response.
+ */
+static void flash(char *cmd_parameter, char *response)
+{
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
+	fastboot_mmc_flash_write(cmd_parameter, fastboot_buf_addr, image_size,
+				 response);
+#endif
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_NAND)
+	fastboot_nand_flash_write(cmd_parameter, fastboot_buf_addr, image_size,
+				  response);
+#endif
+}
+
+/**
+ * erase() - erase the indicated partition.
+ *
+ * @cmd_parameter: Pointer to partition name
+ * @response: Pointer to fastboot response buffer
+ *
+ * Erases the partition indicated by cmd_parameter (clear to 0x00s). Writes
+ * to response.
+ */
+static void erase(char *cmd_parameter, char *response)
+{
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_MMC)
+	fastboot_mmc_erase(cmd_parameter, response);
+#endif
+#if CONFIG_IS_ENABLED(FASTBOOT_FLASH_NAND)
+	fastboot_nand_erase(cmd_parameter, response);
+#endif
+}
+#endif
+
+/**
+ * reboot_bootloader() - Sets reboot bootloader flag.
+ *
+ * @cmd_parameter: Pointer to command parameter
+ * @response: Pointer to fastboot response buffer
+ */
+static void reboot_bootloader(char *cmd_parameter, char *response)
+{
+	if (fastboot_set_reboot_flag())
+		fastboot_fail("Cannot set reboot flag", response);
+	else
+		fastboot_okay(NULL, response);
+}