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 } 97