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[u-boot] / common / dfu.c
1 /*
2  * dfu.c -- dfu command
3  *
4  * Copyright (C) 2015
5  * Lukasz Majewski <l.majewski@majess.pl>
6  *
7  * Copyright (C) 2012 Samsung Electronics
8  * authors: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
9  *          Lukasz Majewski <l.majewski@samsung.com>
10  *
11  * SPDX-License-Identifier:     GPL-2.0+
12  */
13
14 #include <common.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
22 int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
23 {
24         bool dfu_reset = false;
25         int ret, i = 0;
26
27         ret = board_usb_init(usbctrl_index, USB_INIT_DEVICE);
28         if (ret) {
29                 pr_err("board usb init failed\n");
30                 return CMD_RET_FAILURE;
31         }
32         g_dnl_clear_detach();
33         ret = g_dnl_register(usb_dnl_gadget);
34         if (ret) {
35                 pr_err("g_dnl_register failed");
36                 return CMD_RET_FAILURE;
37         }
38
39         while (1) {
40                 if (g_dnl_detach()) {
41                         /*
42                          * Check if USB bus reset is performed after detach,
43                          * which indicates that -R switch has been passed to
44                          * dfu-util. In this case reboot the device
45                          */
46                         if (dfu_usb_get_reset()) {
47                                 dfu_reset = true;
48                                 goto exit;
49                         }
50
51                         /*
52                          * This extra number of usb_gadget_handle_interrupts()
53                          * calls is necessary to assure correct transmission
54                          * completion with dfu-util
55                          */
56                         if (++i == 10000)
57                                 goto exit;
58                 }
59
60                 if (ctrlc())
61                         goto exit;
62
63                 if (dfu_get_defer_flush()) {
64                         /*
65                          * Call to usb_gadget_handle_interrupts() is necessary
66                          * to act on ZLP OUT transaction from HOST PC after
67                          * transmitting the whole file.
68                          *
69                          * If this ZLP OUT packet is NAK'ed, the HOST libusb
70                          * function fails after timeout (by default it is set to
71                          * 5 seconds). In such situation the dfu-util program
72                          * exits with error message.
73                          */
74                         usb_gadget_handle_interrupts(usbctrl_index);
75                         ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
76                         dfu_set_defer_flush(NULL);
77                         if (ret) {
78                                 pr_err("Deferred dfu_flush() failed!");
79                                 goto exit;
80                         }
81                 }
82
83                 WATCHDOG_RESET();
84                 usb_gadget_handle_interrupts(usbctrl_index);
85         }
86 exit:
87         g_dnl_unregister();
88         board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
89
90         if (dfu_reset)
91                 do_reset(NULL, 0, 0, NULL);
92
93         g_dnl_clear_detach();
94
95         return ret;
96 }