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 #include <linux/printk.h>
  23
  24 int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
  25 {
  26         bool dfu_reset = false;
  27         struct udevice *udc;
  28         int ret, i = 0;
  29
  30         ret = udc_device_get_by_index(usbctrl_index, &udc);
  31         if (ret) {
  32                 pr_err("udc_device_get_by_index failed\n");
  33                 return CMD_RET_FAILURE;
  34         }
  35         g_dnl_clear_detach();
  36         ret = g_dnl_register(usb_dnl_gadget);
  37         if (ret) {
  38                 pr_err("g_dnl_register failed");
  39                 ret = CMD_RET_FAILURE;
  40                 goto err_detach;
  41         }
  42
  43 #ifdef CONFIG_DFU_TIMEOUT
  44         unsigned long start_time = get_timer(0);
  45 #endif
  46
  47         while (1) {
  48                 if (g_dnl_detach()) {
  49                         /*
  50                          * Check if USB bus reset is performed after detach,
  51                          * which indicates that -R switch has been passed to
  52                          * dfu-util. In this case reboot the device
  53                          */
  54                         if (dfu_usb_get_reset()) {
  55                                 dfu_reset = true;
  56                                 goto exit;
  57                         }
  58
  59                         /*
  60                          * This extra number of dm_usb_gadget_handle_interrupts()
  61                          * calls is necessary to assure correct transmission
  62                          * completion with dfu-util
  63                          */
  64                         if (++i == 10000)
  65                                 goto exit;
  66                 }
  67
  68                 if (ctrlc())
  69                         goto exit;
  70
  71                 if (dfu_get_defer_flush()) {
  72                         /*
  73                          * Call to dm_usb_gadget_handle_interrupts() is necessary
  74                          * to act on ZLP OUT transaction from HOST PC after
  75                          * transmitting the whole file.
  76                          *
  77                          * If this ZLP OUT packet is NAK'ed, the HOST libusb
  78                          * function fails after timeout (by default it is set to
  79                          * 5 seconds). In such situation the dfu-util program
  80                          * exits with error message.
  81                          */
  82                         dm_usb_gadget_handle_interrupts(udc);
  83                         ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
  84                         dfu_set_defer_flush(NULL);
  85                         if (ret) {
  86                                 pr_err("Deferred dfu_flush() failed!");
  87                                 goto exit;
  88                         }
  89                 }
  90
  91 #ifdef CONFIG_DFU_TIMEOUT
  92                 unsigned long wait_time = dfu_get_timeout();
  93
  94                 if (wait_time) {
  95                         unsigned long current_time = get_timer(start_time);
  96
  97                         if (current_time > wait_time) {
  98                                 debug("Inactivity timeout, abort DFU\n");
  99                                 goto exit;
 100                         }
 101                 }
 102 #endif
 103
 104                 if (dfu_reinit_needed)
 105                         goto exit;
 106
 107                 schedule();
 108                 dm_usb_gadget_handle_interrupts(udc);
 109         }
 110 exit:
 111         g_dnl_unregister();
 112 err_detach:
 113         udc_device_put(udc);
 114
 115         if (dfu_reset)
 116                 do_reset(NULL, 0, 0, NULL);
 117
 118         g_dnl_clear_detach();
 119
 120         return ret;
 121 }