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  */
wa_create(struct wahc * wa,struct usb_interface * iface,kernel_ulong_t quirks)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 
__wa_destroy(struct wahc * wa)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  */
wa_reset_all(struct wahc * wa)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");
89