ata: sata_sil: Remove useless BLK guard in sata_sil.h
[platform/kernel/u-boot.git] / common / dfu.c
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 <common.h>
14 #include <command.h>
15 #include <log.h>
16 #include <watchdog.h>
17 #include <dfu.h>
18 #include <console.h>
19 #include <g_dnl.h>
20 #include <usb.h>
21 #include <net.h>
22
23 int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
24 {
25         bool dfu_reset = false;
26         int ret, i = 0;
27
28         ret = usb_gadget_initialize(usbctrl_index);
29         if (ret) {
30                 pr_err("usb_gadget_initialize failed\n");
31                 return CMD_RET_FAILURE;
32         }
33         g_dnl_clear_detach();
34         ret = g_dnl_register(usb_dnl_gadget);
35         if (ret) {
36                 pr_err("g_dnl_register failed");
37                 return CMD_RET_FAILURE;
38         }
39
40 #ifdef CONFIG_DFU_TIMEOUT
41         unsigned long start_time = get_timer(0);
42 #endif
43
44         while (1) {
45                 if (g_dnl_detach()) {
46                         /*
47                          * Check if USB bus reset is performed after detach,
48                          * which indicates that -R switch has been passed to
49                          * dfu-util. In this case reboot the device
50                          */
51                         if (dfu_usb_get_reset()) {
52                                 dfu_reset = true;
53                                 goto exit;
54                         }
55
56                         /*
57                          * This extra number of usb_gadget_handle_interrupts()
58                          * calls is necessary to assure correct transmission
59                          * completion with dfu-util
60                          */
61                         if (++i == 10000)
62                                 goto exit;
63                 }
64
65                 if (ctrlc())
66                         goto exit;
67
68                 if (dfu_get_defer_flush()) {
69                         /*
70                          * Call to usb_gadget_handle_interrupts() is necessary
71                          * to act on ZLP OUT transaction from HOST PC after
72                          * transmitting the whole file.
73                          *
74                          * If this ZLP OUT packet is NAK'ed, the HOST libusb
75                          * function fails after timeout (by default it is set to
76                          * 5 seconds). In such situation the dfu-util program
77                          * exits with error message.
78                          */
79                         usb_gadget_handle_interrupts(usbctrl_index);
80                         ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
81                         dfu_set_defer_flush(NULL);
82                         if (ret) {
83                                 pr_err("Deferred dfu_flush() failed!");
84                                 goto exit;
85                         }
86                 }
87
88 #ifdef CONFIG_DFU_TIMEOUT
89                 unsigned long wait_time = dfu_get_timeout();
90
91                 if (wait_time) {
92                         unsigned long current_time = get_timer(start_time);
93
94                         if (current_time > wait_time) {
95                                 debug("Inactivity timeout, abort DFU\n");
96                                 goto exit;
97                         }
98                 }
99 #endif
100
101                 if (dfu_reinit_needed)
102                         goto exit;
103
104                 WATCHDOG_RESET();
105                 usb_gadget_handle_interrupts(usbctrl_index);
106         }
107 exit:
108         g_dnl_unregister();
109         usb_gadget_release(usbctrl_index);
110
111         if (dfu_reset)
112                 do_reset(NULL, 0, 0, NULL);
113
114         g_dnl_clear_detach();
115
116         return ret;
117 }