drivers/usb/wusbcore/wa-hc.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Wire Adapter Host Controller Driver
   4  * Common items to HWA and DWA based HCDs
   5  *
   6  * Copyright (C) 2005-2006 Intel Corporation
   7  * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
   8  *
   9  * FIXME: docs
  10  */
  11 #include <linux/slab.h>
  12 #include <linux/module.h>
  13 #include "wusbhc.h"
  14 #include "wa-hc.h"
  15
  16 /**
  17  * Assumes
  18  *
  19  * wa->usb_dev and wa->usb_iface initialized and refcounted,
  20  * wa->wa_descr initialized.
  21  */
  22 int wa_create(struct wahc *wa, struct usb_interface *iface,
  23         kernel_ulong_t quirks)
  24 {
  25         int result;
  26         struct device *dev = &iface->dev;
  27
  28         if (iface->cur_altsetting->desc.bNumEndpoints < 3)
  29                 return -ENODEV;
  30
  31         result = wa_rpipes_create(wa);
  32         if (result < 0)
  33                 goto error_rpipes_create;
  34         wa->quirks = quirks;
  35         /* Fill up Data Transfer EP pointers */
  36         wa->dti_epd = &iface->cur_altsetting->endpoint[1].desc;
  37         wa->dto_epd = &iface->cur_altsetting->endpoint[2].desc;
  38         wa->dti_buf_size = usb_endpoint_maxp(wa->dti_epd);
  39         wa->dti_buf = kmalloc(wa->dti_buf_size, GFP_KERNEL);
  40         if (wa->dti_buf == NULL) {
  41                 result = -ENOMEM;
  42                 goto error_dti_buf_alloc;
  43         }
  44         result = wa_nep_create(wa, iface);
  45         if (result < 0) {
  46                 dev_err(dev, "WA-CDS: can't initialize notif endpoint: %d\n",
  47                         result);
  48                 goto error_nep_create;
  49         }
  50         return 0;
  51
  52 error_nep_create:
  53         kfree(wa->dti_buf);
  54 error_dti_buf_alloc:
  55         wa_rpipes_destroy(wa);
  56 error_rpipes_create:
  57         return result;
  58 }
  59 EXPORT_SYMBOL_GPL(wa_create);
  60
  61
  62 void __wa_destroy(struct wahc *wa)
  63 {
  64         if (wa->dti_urb) {
  65                 usb_kill_urb(wa->dti_urb);
  66                 usb_put_urb(wa->dti_urb);
  67         }
  68         kfree(wa->dti_buf);
  69         wa_nep_destroy(wa);
  70         wa_rpipes_destroy(wa);
  71 }
  72 EXPORT_SYMBOL_GPL(__wa_destroy);
  73
  74 /**
  75  * wa_reset_all - reset the WA device
  76  * @wa: the WA to be reset
  77  *
  78  * For HWAs the radio controller and all other PALs are also reset.
  79  */
  80 void wa_reset_all(struct wahc *wa)
  81 {
  82         /* FIXME: assuming HWA. */
  83         wusbhc_reset_all(wa->wusb);
  84 }
  85
  86 MODULE_AUTHOR("Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>");
  87 MODULE_DESCRIPTION("Wireless USB Wire Adapter core");
  88 MODULE_LICENSE("GPL");