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 ret = g_dnl_register(usb_dnl_gadget); 30 if (ret) { 31 error("g_dnl_register failed"); 32 return CMD_RET_FAILURE; 33 } 34 35 while (1) { 36 if (g_dnl_detach()) { 37 /* 38 * Check if USB bus reset is performed after detach, 39 * which indicates that -R switch has been passed to 40 * dfu-util. In this case reboot the device 41 */ 42 if (dfu_usb_get_reset()) { 43 dfu_reset = true; 44 goto exit; 45 } 46 47 /* 48 * This extra number of usb_gadget_handle_interrupts() 49 * calls is necessary to assure correct transmission 50 * completion with dfu-util 51 */ 52 if (++i == 10000) 53 goto exit; 54 } 55 56 if (ctrlc()) 57 goto exit; 58 59 if (dfu_get_defer_flush()) { 60 /* 61 * Call to usb_gadget_handle_interrupts() is necessary 62 * to act on ZLP OUT transaction from HOST PC after 63 * transmitting the whole file. 64 * 65 * If this ZLP OUT packet is NAK'ed, the HOST libusb 66 * function fails after timeout (by default it is set to 67 * 5 seconds). In such situation the dfu-util program 68 * exits with error message. 69 */ 70 usb_gadget_handle_interrupts(usbctrl_index); 71 ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0); 72 dfu_set_defer_flush(NULL); 73 if (ret) { 74 error("Deferred dfu_flush() failed!"); 75 goto exit; 76 } 77 } 78 79 WATCHDOG_RESET(); 80 usb_gadget_handle_interrupts(usbctrl_index); 81 } 82 exit: 83 g_dnl_unregister(); 84 board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE); 85 86 if (dfu_reset) 87 run_command("reset", 0); 88 89 g_dnl_clear_detach(); 90 91 return ret; 92 } 93