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 board_usb_init(usbctrl_index, USB_INIT_DEVICE); 28 g_dnl_clear_detach(); 29 g_dnl_register(usb_dnl_gadget); 30 while (1) { 31 if (g_dnl_detach()) { 32 /* 33 * Check if USB bus reset is performed after detach, 34 * which indicates that -R switch has been passed to 35 * dfu-util. In this case reboot the device 36 */ 37 if (dfu_usb_get_reset()) { 38 dfu_reset = true; 39 goto exit; 40 } 41 42 /* 43 * This extra number of usb_gadget_handle_interrupts() 44 * calls is necessary to assure correct transmission 45 * completion with dfu-util 46 */ 47 if (++i == 10000) 48 goto exit; 49 } 50 51 if (ctrlc()) 52 goto exit; 53 54 if (dfu_get_defer_flush()) { 55 /* 56 * Call to usb_gadget_handle_interrupts() is necessary 57 * to act on ZLP OUT transaction from HOST PC after 58 * transmitting the whole file. 59 * 60 * If this ZLP OUT packet is NAK'ed, the HOST libusb 61 * function fails after timeout (by default it is set to 62 * 5 seconds). In such situation the dfu-util program 63 * exits with error message. 64 */ 65 usb_gadget_handle_interrupts(usbctrl_index); 66 ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0); 67 dfu_set_defer_flush(NULL); 68 if (ret) { 69 error("Deferred dfu_flush() failed!"); 70 goto exit; 71 } 72 } 73 74 WATCHDOG_RESET(); 75 usb_gadget_handle_interrupts(usbctrl_index); 76 } 77 exit: 78 g_dnl_unregister(); 79 board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE); 80 81 if (dfu_reset) 82 run_command("reset", 0); 83 84 g_dnl_clear_detach(); 85 86 return ret; 87 } 88