409 lines
9.0 KiB
C
409 lines
9.0 KiB
C
/*
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* Copyright (c) 2009, Google Inc.
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* All rights reserved.
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*
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* Copyright (c) 2013, The Linux Foundation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <debug.h>
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#include <string.h>
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#include <stdlib.h>
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#include <platform.h>
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#include <kernel/thread.h>
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#include <kernel/event.h>
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#include <dev/udc.h>
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#include "fastboot.h"
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#define MAX_USBFS_BULK_SIZE (32 * 1024)
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void boot_linux(void *bootimg, unsigned sz);
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/* todo: give lk strtoul and nuke this */
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static unsigned hex2unsigned(const char *x)
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{
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unsigned n = 0;
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while(*x) {
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switch(*x) {
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case '0': case '1': case '2': case '3': case '4':
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case '5': case '6': case '7': case '8': case '9':
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n = (n << 4) | (*x - '0');
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break;
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case 'a': case 'b': case 'c':
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case 'd': case 'e': case 'f':
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n = (n << 4) | (*x - 'a' + 10);
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break;
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case 'A': case 'B': case 'C':
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case 'D': case 'E': case 'F':
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n = (n << 4) | (*x - 'A' + 10);
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break;
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default:
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return n;
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}
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x++;
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}
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return n;
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}
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struct fastboot_cmd {
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struct fastboot_cmd *next;
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const char *prefix;
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unsigned prefix_len;
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void (*handle)(const char *arg, void *data, unsigned sz);
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};
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struct fastboot_var {
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struct fastboot_var *next;
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const char *name;
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const char *value;
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};
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static struct fastboot_cmd *cmdlist;
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void fastboot_register(const char *prefix,
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void (*handle)(const char *arg, void *data, unsigned sz))
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{
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struct fastboot_cmd *cmd;
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cmd = malloc(sizeof(*cmd));
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if (cmd) {
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cmd->prefix = prefix;
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cmd->prefix_len = strlen(prefix);
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cmd->handle = handle;
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cmd->next = cmdlist;
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cmdlist = cmd;
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}
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}
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static struct fastboot_var *varlist;
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void fastboot_publish(const char *name, const char *value)
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{
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struct fastboot_var *var;
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var = malloc(sizeof(*var));
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if (var) {
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var->name = name;
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var->value = value;
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var->next = varlist;
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varlist = var;
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}
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}
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static event_t usb_online;
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static event_t txn_done;
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static struct udc_endpoint *in, *out;
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static struct udc_request *req;
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int txn_status;
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static void *download_base;
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static unsigned download_max;
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static unsigned download_size;
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#define STATE_OFFLINE 0
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#define STATE_COMMAND 1
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#define STATE_COMPLETE 2
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#define STATE_ERROR 3
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static unsigned fastboot_state = STATE_OFFLINE;
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static void req_complete(struct udc_request *req, unsigned actual, int status)
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{
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txn_status = status;
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req->length = actual;
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event_signal(&txn_done, 0);
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}
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static int usb_read(void *_buf, unsigned len)
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{
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int r;
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unsigned xfer;
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unsigned char *buf = _buf;
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int count = 0;
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if (fastboot_state == STATE_ERROR)
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goto oops;
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while (len > 0) {
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xfer = (len > MAX_USBFS_BULK_SIZE) ? MAX_USBFS_BULK_SIZE : len;
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req->buf = PA((addr_t)buf);
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req->length = xfer;
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req->complete = req_complete;
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r = udc_request_queue(out, req);
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if (r < 0) {
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dprintf(INFO, "usb_read() queue failed\n");
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goto oops;
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}
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event_wait(&txn_done);
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if (txn_status < 0) {
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dprintf(INFO, "usb_read() transaction failed\n");
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goto oops;
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}
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count += req->length;
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buf += req->length;
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len -= req->length;
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/* short transfer? */
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if (req->length != xfer) break;
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}
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/*
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* Force reload of buffer from memory
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* since transaction is complete now.
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*/
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arch_invalidate_cache_range(_buf, count);
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return count;
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oops:
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fastboot_state = STATE_ERROR;
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return -1;
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}
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static int usb_write(void *buf, unsigned len)
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{
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int r;
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if (fastboot_state == STATE_ERROR)
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goto oops;
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req->buf = PA((addr_t)buf);
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req->length = len;
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req->complete = req_complete;
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r = udc_request_queue(in, req);
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if (r < 0) {
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dprintf(INFO, "usb_write() queue failed\n");
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goto oops;
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}
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event_wait(&txn_done);
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if (txn_status < 0) {
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dprintf(INFO, "usb_write() transaction failed\n");
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goto oops;
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}
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return req->length;
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oops:
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fastboot_state = STATE_ERROR;
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return -1;
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}
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void fastboot_ack(const char *code, const char *reason)
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{
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STACKBUF_DMA_ALIGN(response, MAX_RSP_SIZE);
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if (fastboot_state != STATE_COMMAND)
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return;
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if (reason == 0)
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reason = "";
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snprintf(response, MAX_RSP_SIZE, "%s%s", code, reason);
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fastboot_state = STATE_COMPLETE;
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usb_write(response, strlen(response));
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}
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void fastboot_info(const char *reason)
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{
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STACKBUF_DMA_ALIGN(response, MAX_RSP_SIZE);
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if (fastboot_state != STATE_COMMAND)
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return;
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if (reason == 0)
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return;
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snprintf(response, MAX_RSP_SIZE, "INFO%s", reason);
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usb_write(response, strlen(response));
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}
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void fastboot_fail(const char *reason)
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{
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fastboot_ack("FAIL", reason);
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}
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void fastboot_okay(const char *info)
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{
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fastboot_ack("OKAY", info);
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}
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static void cmd_getvar(const char *arg, void *data, unsigned sz)
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{
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struct fastboot_var *var;
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for (var = varlist; var; var = var->next) {
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if (!strcmp(var->name, arg)) {
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fastboot_okay(var->value);
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return;
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}
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}
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fastboot_okay("");
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}
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static void cmd_download(const char *arg, void *data, unsigned sz)
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{
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STACKBUF_DMA_ALIGN(response, MAX_RSP_SIZE);
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unsigned len = hex2unsigned(arg);
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int r;
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download_size = 0;
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if (len > download_max) {
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fastboot_fail("data too large");
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return;
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}
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snprintf(response, MAX_RSP_SIZE, "DATA%08x", len);
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if (usb_write(response, strlen(response)) < 0)
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return;
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r = usb_read(download_base, len);
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if ((r < 0) || ((unsigned) r != len)) {
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fastboot_state = STATE_ERROR;
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return;
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}
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download_size = len;
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fastboot_okay("");
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}
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static void fastboot_command_loop(void)
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{
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struct fastboot_cmd *cmd;
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int r;
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dprintf(INFO,"fastboot: processing commands\n");
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uint8_t *buffer = (uint8_t *)memalign(CACHE_LINE, ROUNDUP(4096, CACHE_LINE));
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if (!buffer)
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{
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dprintf(CRITICAL, "Could not allocate memory for fastboot buffer\n.");
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ASSERT(0);
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}
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again:
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while (fastboot_state != STATE_ERROR) {
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r = usb_read(buffer, MAX_RSP_SIZE);
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if (r < 0) break;
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buffer[r] = 0;
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dprintf(INFO,"fastboot: %s\n", buffer);
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for (cmd = cmdlist; cmd; cmd = cmd->next) {
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if (memcmp(buffer, cmd->prefix, cmd->prefix_len))
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continue;
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fastboot_state = STATE_COMMAND;
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cmd->handle((const char*) buffer + cmd->prefix_len,
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(void*) download_base, download_size);
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if (fastboot_state == STATE_COMMAND)
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fastboot_fail("unknown reason");
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goto again;
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}
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fastboot_fail("unknown command");
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}
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fastboot_state = STATE_OFFLINE;
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dprintf(INFO,"fastboot: oops!\n");
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free(buffer);
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}
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static int fastboot_handler(void *arg)
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{
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for (;;) {
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event_wait(&usb_online);
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fastboot_command_loop();
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}
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return 0;
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}
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static void fastboot_notify(struct udc_gadget *gadget, unsigned event)
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{
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if (event == UDC_EVENT_ONLINE) {
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event_signal(&usb_online, 0);
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}
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}
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static struct udc_endpoint *fastboot_endpoints[2];
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static struct udc_gadget fastboot_gadget = {
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.notify = fastboot_notify,
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.ifc_class = 0xff,
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.ifc_subclass = 0x42,
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.ifc_protocol = 0x03,
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.ifc_endpoints = 2,
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.ifc_string = "fastboot",
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.ept = fastboot_endpoints,
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};
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int fastboot_init(void *base, unsigned size)
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{
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thread_t *thr;
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dprintf(INFO, "fastboot_init()\n");
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download_base = base;
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download_max = size;
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event_init(&usb_online, 0, EVENT_FLAG_AUTOUNSIGNAL);
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event_init(&txn_done, 0, EVENT_FLAG_AUTOUNSIGNAL);
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in = udc_endpoint_alloc(UDC_TYPE_BULK_IN, 512);
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if (!in)
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goto fail_alloc_in;
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out = udc_endpoint_alloc(UDC_TYPE_BULK_OUT, 512);
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if (!out)
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goto fail_alloc_out;
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fastboot_endpoints[0] = in;
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fastboot_endpoints[1] = out;
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req = udc_request_alloc();
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if (!req)
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goto fail_alloc_req;
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if (udc_register_gadget(&fastboot_gadget))
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goto fail_udc_register;
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fastboot_register("getvar:", cmd_getvar);
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fastboot_register("download:", cmd_download);
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fastboot_publish("version", "0.5");
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thr = thread_create("fastboot", fastboot_handler, 0, DEFAULT_PRIORITY, 4096);
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if (!thr)
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{
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goto fail_alloc_in;
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}
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thread_resume(thr);
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return 0;
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fail_udc_register:
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udc_request_free(req);
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fail_alloc_req:
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udc_endpoint_free(out);
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fail_alloc_out:
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udc_endpoint_free(in);
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fail_alloc_in:
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return -1;
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}
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