common/dfu.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * dfu.c -- dfu command
   4  *
   5  * Copyright (C) 2015
   6  * Lukasz Majewski <[email protected]>
   7  *
   8  * Copyright (C) 2012 Samsung Electronics
   9  * authors: Andrzej Pietrasiewicz <[email protected]>
  10  *          Lukasz Majewski <[email protected]>
  11  */
  12
  13 #include <command.h>
  14 #include <log.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 #include <linux/printk.h>
  22
  23 int run_usb_dnl_gadget(int usbctrl_index, char *usb_dnl_gadget)
  24 {
  25         bool dfu_reset = false;
  26         struct udevice *udc;
  27         int ret, i = 0;
  28
  29         ret = udc_device_get_by_index(usbctrl_index, &udc);
  30         if (ret) {
  31                 pr_err("udc_device_get_by_index failed\n");
  32                 return CMD_RET_FAILURE;
  33         }
  34         g_dnl_clear_detach();
  35         ret = g_dnl_register(usb_dnl_gadget);
  36         if (ret) {
  37                 pr_err("g_dnl_register failed");
  38                 ret = CMD_RET_FAILURE;
  39                 goto err_detach;
  40         }
  41
  42 #ifdef CONFIG_DFU_TIMEOUT
  43         unsigned long start_time = get_timer(0);
  44 #endif
  45
  46         while (1) {
  47                 if (g_dnl_detach()) {
  48                         /*
  49                          * Check if USB bus reset is performed after detach,
  50                          * which indicates that -R switch has been passed to
  51                          * dfu-util. In this case reboot the device
  52                          */
  53                         if (dfu_usb_get_reset()) {
  54                                 dfu_reset = true;
  55                                 goto exit;
  56                         }
  57
  58                         /*
  59                          * This extra number of dm_usb_gadget_handle_interrupts()
  60                          * calls is necessary to assure correct transmission
  61                          * completion with dfu-util
  62                          */
  63                         if (++i == 10000)
  64                                 goto exit;
  65                 }
  66
  67                 if (ctrlc())
  68                         goto exit;
  69
  70                 if (dfu_get_defer_flush()) {
  71                         /*
  72                          * Call to dm_usb_gadget_handle_interrupts() is necessary
  73                          * to act on ZLP OUT transaction from HOST PC after
  74                          * transmitting the whole file.
  75                          *
  76                          * If this ZLP OUT packet is NAK'ed, the HOST libusb
  77                          * function fails after timeout (by default it is set to
  78                          * 5 seconds). In such situation the dfu-util program
  79                          * exits with error message.
  80                          */
  81                         dm_usb_gadget_handle_interrupts(udc);
  82                         ret = dfu_flush(dfu_get_defer_flush(), NULL, 0, 0);
  83                         dfu_set_defer_flush(NULL);
  84                         if (ret) {
  85                                 pr_err("Deferred dfu_flush() failed!");
  86                                 goto exit;
  87                         }
  88                 }
  89
  90 #ifdef CONFIG_DFU_TIMEOUT
  91                 unsigned long wait_time = dfu_get_timeout();
  92
  93                 if (wait_time) {
  94                         unsigned long current_time = get_timer(start_time);
  95
  96                         if (current_time > wait_time) {
  97                                 debug("Inactivity timeout, abort DFU\n");
  98                                 goto exit;
  99                         }
 100                 }
 101 #endif
 102
 103                 if (dfu_reinit_needed)
 104                         goto exit;
 105
 106                 schedule();
 107                 dm_usb_gadget_handle_interrupts(udc);
 108         }
 109 exit:
 110         g_dnl_unregister();
 111 err_detach:
 112         udc_device_put(udc);
 113
 114         if (dfu_reset)
 115                 do_reset(NULL, 0, 0, NULL);
 116
 117         g_dnl_clear_detach();
 118
 119         return ret;
 120 }