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"Das U-Boot" Source Tree
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * dfu.c -- dfu command
4 *
5 * Copyright (C) 2015
6 * Lukasz Majewski <l.majewski@majess.pl>
7 *
8 * Copyright (C) 2012 Samsung Electronics
9 * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
10 * Lukasz Majewski <l.majewski@samsung.com>
11 */
12
13#include <command.h>
14#include <log.h>
15#include <watchdog.h>
16#include <dfu.h>
17#include <console.h>
18#include <g_dnl.h>
19#include <usb.h>
20#include <net.h>
21#include <linux/printk.h>
22
23int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
24{
25 bool dfu_reset = false;
26 struct udevice *udc;
27 int ret, i = 0;
28
29 ret = udc_device_get_by_index(usbctrl_index, &udc);
30 if (ret) {
31 pr_err("udc_device_get_by_index failed\n");
32 return CMD_RET_FAILURE;
33 }
34 g_dnl_clear_detach();
35 ret = g_dnl_register(usb_dnl_gadget);
36 if (ret) {
37 pr_err("g_dnl_register failed");
38 ret = CMD_RET_FAILURE;
39 goto err_detach;
40 }
41
42#ifdef CONFIG_DFU_TIMEOUT
43 unsigned long start_time = get_timer(0);
44#endif
45
46 while (1) {
47 if (g_dnl_detach()) {
48 /*
49 * Check if USB bus reset is performed after detach,
50 * which indicates that -R switch has been passed to
51 * dfu-util. In this case reboot the device
52 */
53 if (dfu_usb_get_reset()) {
54 dfu_reset = true;
55 goto exit;
56 }
57
58 /*
59 * This extra number of dm_usb_gadget_handle_interrupts()
60 * calls is necessary to assure correct transmission
61 * completion with dfu-util
62 */
63 if (++i == 10000)
64 goto exit;
65 }
66
67 if (ctrlc())
68 goto exit;
69
70 if (dfu_get_defer_flush()) {
71 /*
72 * Call to dm_usb_gadget_handle_interrupts() is necessary
73 * to act on ZLP OUT transaction from HOST PC after
74 * transmitting the whole file.
75 *
76 * If this ZLP OUT packet is NAK'ed, the HOST libusb
77 * function fails after timeout (by default it is set to
78 * 5 seconds). In such situation the dfu-util program
79 * exits with error message.
80 */
81 dm_usb_gadget_handle_interrupts(udc);
82 ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
83 dfu_set_defer_flush(NULL);
84 if (ret) {
85 pr_err("Deferred dfu_flush() failed!");
86 goto exit;
87 }
88 }
89
90#ifdef CONFIG_DFU_TIMEOUT
91 unsigned long wait_time = dfu_get_timeout();
92
93 if (wait_time) {
94 unsigned long current_time = get_timer(start_time);
95
96 if (current_time > wait_time) {
97 debug("Inactivity timeout, abort DFU\n");
98 goto exit;
99 }
100 }
101#endif
102
103 if (dfu_reinit_needed)
104 goto exit;
105
106 schedule();
107 dm_usb_gadget_handle_interrupts(udc);
108 }
109exit:
110 g_dnl_unregister();
111err_detach:
112 udc_device_put(udc);
113
114 if (dfu_reset)
115 do_reset(NULL, 0, 0, NULL);
116
117 g_dnl_clear_detach();
118
119 return ret;
120}