mirror of
https://github.com/AsahiLinux/u-boot
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1e94b46f73
This old patch was marked as deferred. Bring it back to life, to continue towards the removal of common.h Move this out of the common header and include it only where needed. Signed-off-by: Simon Glass <sjg@chromium.org>
289 lines
7.5 KiB
C
289 lines
7.5 KiB
C
// SPDX-License-Identifier: BSD-2-Clause
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/*
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* Copyright (C) 2016 The Android Open Source Project
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*/
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#include <common.h>
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#include <command.h>
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#include <fastboot.h>
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#include <net.h>
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#include <net/fastboot_udp.h>
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#include <linux/printk.h>
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enum {
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FASTBOOT_ERROR = 0,
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FASTBOOT_QUERY = 1,
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FASTBOOT_INIT = 2,
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FASTBOOT_FASTBOOT = 3,
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};
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struct __packed fastboot_header {
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uchar id;
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uchar flags;
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unsigned short seq;
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};
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#define PACKET_SIZE 1024
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#define DATA_SIZE (PACKET_SIZE - sizeof(struct fastboot_header))
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/* Sequence number sent for every packet */
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static unsigned short sequence_number = 1;
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static const unsigned short packet_size = PACKET_SIZE;
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static const unsigned short udp_version = 1;
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/* Keep track of last packet for resubmission */
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static uchar last_packet[PACKET_SIZE];
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static unsigned int last_packet_len;
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static struct in_addr fastboot_remote_ip;
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/* The UDP port at their end */
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static int fastboot_remote_port;
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/* The UDP port at our end */
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static int fastboot_our_port;
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/**
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* fastboot_udp_send_info() - Send an INFO packet during long commands.
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*
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* @msg: String describing the reason for waiting
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*/
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static void fastboot_udp_send_info(const char *msg)
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{
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uchar *packet;
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uchar *packet_base;
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int len = 0;
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char response[FASTBOOT_RESPONSE_LEN] = {0};
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struct fastboot_header response_header = {
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.id = FASTBOOT_FASTBOOT,
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.flags = 0,
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.seq = htons(sequence_number)
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};
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++sequence_number;
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packet = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
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packet_base = packet;
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/* Write headers */
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memcpy(packet, &response_header, sizeof(response_header));
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packet += sizeof(response_header);
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/* Write response */
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fastboot_response("INFO", response, "%s", msg);
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memcpy(packet, response, strlen(response));
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packet += strlen(response);
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len = packet - packet_base;
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/* Save packet for retransmitting */
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last_packet_len = len;
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memcpy(last_packet, packet_base, last_packet_len);
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net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip,
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fastboot_remote_port, fastboot_our_port, len);
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}
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/**
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* fastboot_timed_send_info() - Send INFO packet every 30 seconds
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*
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* @msg: String describing the reason for waiting
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*
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* Send an INFO packet during long commands based on timer. An INFO packet
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* is sent if the time is 30 seconds after start. Else, noop.
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*/
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static void fastboot_timed_send_info(const char *msg)
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{
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static ulong start;
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/* Initialize timer */
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if (start == 0)
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start = get_timer(0);
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ulong time = get_timer(start);
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/* Send INFO packet to host every 30 seconds */
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if (time >= 30000) {
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start = get_timer(0);
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fastboot_udp_send_info(msg);
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}
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}
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/**
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* fastboot_send() - Sends a packet in response to received fastboot packet
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*
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* @header: Header for response packet
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* @fastboot_data: Pointer to received fastboot data
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* @fastboot_data_len: Length of received fastboot data
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* @retransmit: Nonzero if sending last sent packet
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*/
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static void fastboot_send(struct fastboot_header header, char *fastboot_data,
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unsigned int fastboot_data_len, uchar retransmit)
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{
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uchar *packet;
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uchar *packet_base;
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int len = 0;
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const char *error_msg = "An error occurred.";
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short tmp;
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struct fastboot_header response_header = header;
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static char command[FASTBOOT_COMMAND_LEN];
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static int cmd = -1;
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static bool pending_command;
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char response[FASTBOOT_RESPONSE_LEN] = {0};
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/*
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* We will always be sending some sort of packet, so
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* cobble together the packet headers now.
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*/
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packet = net_tx_packet + net_eth_hdr_size() + IP_UDP_HDR_SIZE;
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packet_base = packet;
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/* Resend last packet */
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if (retransmit) {
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memcpy(packet, last_packet, last_packet_len);
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net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip,
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fastboot_remote_port, fastboot_our_port,
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last_packet_len);
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return;
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}
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response_header.seq = htons(response_header.seq);
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memcpy(packet, &response_header, sizeof(response_header));
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packet += sizeof(response_header);
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switch (header.id) {
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case FASTBOOT_QUERY:
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tmp = htons(sequence_number);
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memcpy(packet, &tmp, sizeof(tmp));
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packet += sizeof(tmp);
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break;
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case FASTBOOT_INIT:
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tmp = htons(udp_version);
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memcpy(packet, &tmp, sizeof(tmp));
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packet += sizeof(tmp);
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tmp = htons(packet_size);
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memcpy(packet, &tmp, sizeof(tmp));
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packet += sizeof(tmp);
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break;
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case FASTBOOT_ERROR:
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memcpy(packet, error_msg, strlen(error_msg));
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packet += strlen(error_msg);
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break;
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case FASTBOOT_FASTBOOT:
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if (cmd == FASTBOOT_COMMAND_DOWNLOAD) {
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if (!fastboot_data_len && !fastboot_data_remaining()) {
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fastboot_data_complete(response);
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} else {
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fastboot_data_download(fastboot_data,
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fastboot_data_len,
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response);
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}
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} else if (!pending_command) {
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strlcpy(command, fastboot_data,
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min((size_t)fastboot_data_len + 1,
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sizeof(command)));
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pending_command = true;
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} else {
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cmd = fastboot_handle_command(command, response);
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pending_command = false;
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}
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/*
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* Sent some INFO packets, need to update sequence number in
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* header
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*/
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if (header.seq != sequence_number) {
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response_header.seq = htons(sequence_number);
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memcpy(packet_base, &response_header,
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sizeof(response_header));
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}
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/* Write response to packet */
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memcpy(packet, response, strlen(response));
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packet += strlen(response);
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break;
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default:
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pr_err("ID %d not implemented.\n", header.id);
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return;
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}
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len = packet - packet_base;
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/* Save packet for retransmitting */
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last_packet_len = len;
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memcpy(last_packet, packet_base, last_packet_len);
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net_send_udp_packet(net_server_ethaddr, fastboot_remote_ip,
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fastboot_remote_port, fastboot_our_port, len);
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fastboot_handle_boot(cmd, strncmp("OKAY", response, 4) == 0);
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if (!strncmp("OKAY", response, 4) || !strncmp("FAIL", response, 4))
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cmd = -1;
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}
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/**
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* fastboot_handler() - Incoming UDP packet handler.
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*
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* @packet: Pointer to incoming UDP packet
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* @dport: Destination UDP port
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* @sip: Source IP address
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* @sport: Source UDP port
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* @len: Packet length
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*/
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static void fastboot_handler(uchar *packet, unsigned int dport,
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struct in_addr sip, unsigned int sport,
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unsigned int len)
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{
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struct fastboot_header header;
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char fastboot_data[DATA_SIZE] = {0};
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unsigned int fastboot_data_len = 0;
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if (dport != fastboot_our_port)
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return;
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fastboot_remote_ip = sip;
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fastboot_remote_port = sport;
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if (len < sizeof(struct fastboot_header) || len > PACKET_SIZE)
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return;
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memcpy(&header, packet, sizeof(header));
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header.flags = 0;
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header.seq = ntohs(header.seq);
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packet += sizeof(header);
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len -= sizeof(header);
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switch (header.id) {
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case FASTBOOT_QUERY:
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fastboot_send(header, fastboot_data, 0, 0);
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break;
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case FASTBOOT_INIT:
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case FASTBOOT_FASTBOOT:
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fastboot_data_len = len;
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if (len > 0)
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memcpy(fastboot_data, packet, len);
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if (header.seq == sequence_number) {
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fastboot_send(header, fastboot_data,
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fastboot_data_len, 0);
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sequence_number++;
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} else if (header.seq == sequence_number - 1) {
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/* Retransmit last sent packet */
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fastboot_send(header, fastboot_data,
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fastboot_data_len, 1);
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}
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break;
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default:
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pr_err("ID %d not implemented.\n", header.id);
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header.id = FASTBOOT_ERROR;
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fastboot_send(header, fastboot_data, 0, 0);
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break;
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}
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}
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void fastboot_udp_start_server(void)
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{
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printf("Using %s device\n", eth_get_name());
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printf("Listening for fastboot command on %pI4\n", &net_ip);
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fastboot_our_port = CONFIG_UDP_FUNCTION_FASTBOOT_PORT;
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if (IS_ENABLED(CONFIG_FASTBOOT_FLASH))
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fastboot_set_progress_callback(fastboot_timed_send_info);
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net_set_udp_handler(fastboot_handler);
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/* zero out server ether in case the server ip has changed */
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memset(net_server_ethaddr, 0, 6);
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}
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