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 <watchdog.h> 15 #include <dfu.h> 16 #include <console.h> 17 #include <g_dnl.h> 18 #include <usb.h> 19 #include <net.h> 20 21 int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget) 22 { 23 bool dfu_reset = false; 24 int ret, i = 0; 25 26 ret = board_usb_init(usbctrl_index, USB_INIT_DEVICE); 27 if (ret) { 28 pr_err("board usb init failed\n"); 29 return CMD_RET_FAILURE; 30 } 31 g_dnl_clear_detach(); 32 ret = g_dnl_register(usb_dnl_gadget); 33 if (ret) { 34 pr_err("g_dnl_register failed"); 35 return CMD_RET_FAILURE; 36 } 37 38 while (1) { 39 if (g_dnl_detach()) { 40 /* 41 * Check if USB bus reset is performed after detach, 42 * which indicates that -R switch has been passed to 43 * dfu-util. In this case reboot the device 44 */ 45 if (dfu_usb_get_reset()) { 46 dfu_reset = true; 47 goto exit; 48 } 49 50 /* 51 * This extra number of usb_gadget_handle_interrupts() 52 * calls is necessary to assure correct transmission 53 * completion with dfu-util 54 */ 55 if (++i == 10000) 56 goto exit; 57 } 58 59 if (ctrlc()) 60 goto exit; 61 62 if (dfu_get_defer_flush()) { 63 /* 64 * Call to usb_gadget_handle_interrupts() is necessary 65 * to act on ZLP OUT transaction from HOST PC after 66 * transmitting the whole file. 67 * 68 * If this ZLP OUT packet is NAK'ed, the HOST libusb 69 * function fails after timeout (by default it is set to 70 * 5 seconds). In such situation the dfu-util program 71 * exits with error message. 72 */ 73 usb_gadget_handle_interrupts(usbctrl_index); 74 ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0); 75 dfu_set_defer_flush(NULL); 76 if (ret) { 77 pr_err("Deferred dfu_flush() failed!"); 78 goto exit; 79 } 80 } 81 82 WATCHDOG_RESET(); 83 usb_gadget_handle_interrupts(usbctrl_index); 84 } 85 exit: 86 g_dnl_unregister(); 87 board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE); 88 89 if (dfu_reset) 90 do_reset(NULL, 0, 0, NULL); 91 92 g_dnl_clear_detach(); 93 94 return ret; 95 } 96