drivers/usb/gadget/udc/udc-uclass.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com
   4  * Written by Jean-Jacques Hiblot <jjhiblot@ti.com>
   5  */
   6
   7 #define LOG_CATEGORY UCLASS_USB_GADGET_GENERIC
   8
   9 #include <common.h>
  10 #include <dm.h>
  11 #include <dm/device-internal.h>
  12 #include <linux/printk.h>
  13 #include <linux/usb/gadget.h>
  14
  15 #if CONFIG_IS_ENABLED(DM_USB_GADGET)
  16 int udc_device_get_by_index(int index, struct udevice **udev)
  17 {
  18         struct udevice *dev = NULL;
  19         int ret;
  20
  21         ret = uclass_get_device_by_seq(UCLASS_USB_GADGET_GENERIC, index, &dev);
  22         if (!ret && dev) {
  23                 *udev = dev;
  24                 return 0;
  25         }
  26
  27         ret = uclass_get_device(UCLASS_USB_GADGET_GENERIC, index, &dev);
  28         if (!ret && dev) {
  29                 *udev = dev;
  30                 return 0;
  31         }
  32
  33         pr_err("No USB device found\n");
  34         return -ENODEV;
  35 }
  36
  37 int udc_device_put(struct udevice *udev)
  38 {
  39 #if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
  40         return device_remove(udev, DM_REMOVE_NORMAL);
  41 #else
  42         return -ENOSYS;
  43 #endif
  44 }
  45 #else
  46 /* Backwards hardware compatibility -- switch to DM_USB_GADGET */
  47 static int legacy_index;
  48 int udc_device_get_by_index(int index, struct udevice **udev)
  49 {
  50         legacy_index = index;
  51         return board_usb_init(index, USB_INIT_DEVICE);
  52 }
  53
  54 int udc_device_put(struct udevice *udev)
  55 {
  56         return board_usb_cleanup(legacy_index, USB_INIT_DEVICE);
  57 }
  58 #endif
  59
  60 #if CONFIG_IS_ENABLED(DM)
  61 UCLASS_DRIVER(usb_gadget_generic) = {
  62         .id             = UCLASS_USB_GADGET_GENERIC,
  63         .name           = "usb",
  64         .flags          = DM_UC_FLAG_SEQ_ALIAS,
  65 };
  66 #endif