1// SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *  Copyright (c) 2000-2002 Vojtech Pavlik <vojtech@ucw.cz>
4 *  Copyright (c) 2001-2002, 2007 Johann Deneux <johann.deneux@gmail.com>
5 *
6 *  USB/RS232 I-Force joysticks and wheels.
7 */
8
9#include <linux/usb.h>
10#include "iforce.h"
11
12struct iforce_usb {
13	struct iforce iforce;
14
15	struct usb_device *usbdev;
16	struct usb_interface *intf;
17	struct urb *irq, *out;
18
19	u8 data_in[IFORCE_MAX_LENGTH] ____cacheline_aligned;
20	u8 data_out[IFORCE_MAX_LENGTH] ____cacheline_aligned;
21};
22
23static void __iforce_usb_xmit(struct iforce *iforce)
24{
25	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
26						     iforce);
27	int n, c;
28	unsigned long flags;
29
30	spin_lock_irqsave(&iforce->xmit_lock, flags);
31
32	if (iforce->xmit.head == iforce->xmit.tail) {
33		iforce_clear_xmit_and_wake(iforce);
34		spin_unlock_irqrestore(&iforce->xmit_lock, flags);
35		return;
36	}
37
38	((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
39	XMIT_INC(iforce->xmit.tail, 1);
40	n = iforce->xmit.buf[iforce->xmit.tail];
41	XMIT_INC(iforce->xmit.tail, 1);
42
43	iforce_usb->out->transfer_buffer_length = n + 1;
44	iforce_usb->out->dev = iforce_usb->usbdev;
45
46	/* Copy rest of data then */
47	c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
48	if (n < c) c=n;
49
50	memcpy(iforce_usb->out->transfer_buffer + 1,
51	       &iforce->xmit.buf[iforce->xmit.tail],
52	       c);
53	if (n != c) {
54		memcpy(iforce_usb->out->transfer_buffer + 1 + c,
55		       &iforce->xmit.buf[0],
56		       n-c);
57	}
58	XMIT_INC(iforce->xmit.tail, n);
59
60	if ( (n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC)) ) {
61		dev_warn(&iforce_usb->intf->dev,
62			 "usb_submit_urb failed %d\n", n);
63		iforce_clear_xmit_and_wake(iforce);
64	}
65
66	/* The IFORCE_XMIT_RUNNING bit is not cleared here. That's intended.
67	 * As long as the urb completion handler is not called, the transmiting
68	 * is considered to be running */
69	spin_unlock_irqrestore(&iforce->xmit_lock, flags);
70}
71
72static void iforce_usb_xmit(struct iforce *iforce)
73{
74	if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
75		__iforce_usb_xmit(iforce);
76}
77
78static int iforce_usb_get_id(struct iforce *iforce, u8 id,
79			     u8 *response_data, size_t *response_len)
80{
81	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
82						     iforce);
83	u8 *buf;
84	int status;
85
86	buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
87	if (!buf)
88		return -ENOMEM;
89
90	status = usb_control_msg(iforce_usb->usbdev,
91				 usb_rcvctrlpipe(iforce_usb->usbdev, 0),
92				 id,
93				 USB_TYPE_VENDOR | USB_DIR_IN |
94					USB_RECIP_INTERFACE,
95				 0, 0, buf, IFORCE_MAX_LENGTH, 1000);
96	if (status < 0) {
97		dev_err(&iforce_usb->intf->dev,
98			"usb_submit_urb failed: %d\n", status);
99	} else if (buf[0] != id) {
100		status = -EIO;
101	} else {
102		memcpy(response_data, buf, status);
103		*response_len = status;
104		status = 0;
105	}
106
107	kfree(buf);
108	return status;
109}
110
111static int iforce_usb_start_io(struct iforce *iforce)
112{
113	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
114						     iforce);
115
116	if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
117		return -EIO;
118
119	return 0;
120}
121
122static void iforce_usb_stop_io(struct iforce *iforce)
123{
124	struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
125						     iforce);
126
127	usb_kill_urb(iforce_usb->irq);
128	usb_kill_urb(iforce_usb->out);
129}
130
131static const struct iforce_xport_ops iforce_usb_xport_ops = {
132	.xmit		= iforce_usb_xmit,
133	.get_id		= iforce_usb_get_id,
134	.start_io	= iforce_usb_start_io,
135	.stop_io	= iforce_usb_stop_io,
136};
137
138static void iforce_usb_irq(struct urb *urb)
139{
140	struct iforce_usb *iforce_usb = urb->context;
141	struct iforce *iforce = &iforce_usb->iforce;
142	struct device *dev = &iforce_usb->intf->dev;
143	int status;
144
145	switch (urb->status) {
146	case 0:
147		/* success */
148		break;
149	case -ECONNRESET:
150	case -ENOENT:
151	case -ESHUTDOWN:
152		/* this urb is terminated, clean up */
153		dev_dbg(dev, "%s - urb shutting down with status: %d\n",
154			__func__, urb->status);
155		return;
156	default:
157		dev_dbg(dev, "%s - urb has status of: %d\n",
158			__func__, urb->status);
159		goto exit;
160	}
161
162	iforce_process_packet(iforce, iforce_usb->data_in[0],
163			      iforce_usb->data_in + 1, urb->actual_length - 1);
164
165exit:
166	status = usb_submit_urb(urb, GFP_ATOMIC);
167	if (status)
168		dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
169			__func__, status);
170}
171
172static void iforce_usb_out(struct urb *urb)
173{
174	struct iforce_usb *iforce_usb = urb->context;
175	struct iforce *iforce = &iforce_usb->iforce;
176
177	if (urb->status) {
178		dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
179			urb->status);
180		iforce_clear_xmit_and_wake(iforce);
181		return;
182	}
183
184	__iforce_usb_xmit(iforce);
185
186	wake_up_all(&iforce->wait);
187}
188
189static int iforce_usb_probe(struct usb_interface *intf,
190				const struct usb_device_id *id)
191{
192	struct usb_device *dev = interface_to_usbdev(intf);
193	struct usb_host_interface *interface;
194	struct usb_endpoint_descriptor *epirq, *epout;
195	struct iforce_usb *iforce_usb;
196	int err = -ENOMEM;
197
198	interface = intf->cur_altsetting;
199
200	if (interface->desc.bNumEndpoints < 2)
201		return -ENODEV;
202
203	epirq = &interface->endpoint[0].desc;
204	if (!usb_endpoint_is_int_in(epirq))
205		return -ENODEV;
206
207	epout = &interface->endpoint[1].desc;
208	if (!usb_endpoint_is_int_out(epout))
209		return -ENODEV;
210
211	iforce_usb = kzalloc(sizeof(*iforce_usb), GFP_KERNEL);
212	if (!iforce_usb)
213		goto fail;
214
215	iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
216	if (!iforce_usb->irq)
217		goto fail;
218
219	iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
220	if (!iforce_usb->out)
221		goto fail;
222
223	iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
224
225	iforce_usb->usbdev = dev;
226	iforce_usb->intf = intf;
227
228	usb_fill_int_urb(iforce_usb->irq, dev,
229			 usb_rcvintpipe(dev, epirq->bEndpointAddress),
230			 iforce_usb->data_in, sizeof(iforce_usb->data_in),
231			 iforce_usb_irq, iforce_usb, epirq->bInterval);
232
233	usb_fill_int_urb(iforce_usb->out, dev,
234			 usb_sndintpipe(dev, epout->bEndpointAddress),
235			 iforce_usb->data_out, sizeof(iforce_usb->data_out),
236			 iforce_usb_out, iforce_usb, epout->bInterval);
237
238	err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
239	if (err)
240		goto fail;
241
242	usb_set_intfdata(intf, iforce_usb);
243	return 0;
244
245fail:
246	if (iforce_usb) {
247		usb_free_urb(iforce_usb->irq);
248		usb_free_urb(iforce_usb->out);
249		kfree(iforce_usb);
250	}
251
252	return err;
253}
254
255static void iforce_usb_disconnect(struct usb_interface *intf)
256{
257	struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
258
259	usb_set_intfdata(intf, NULL);
260
261	input_unregister_device(iforce_usb->iforce.dev);
262
263	usb_free_urb(iforce_usb->irq);
264	usb_free_urb(iforce_usb->out);
265
266	kfree(iforce_usb);
267}
268
269static const struct usb_device_id iforce_usb_ids[] = {
270	{ USB_DEVICE(0x044f, 0xa01c) },		/* Thrustmaster Motor Sport GT */
271	{ USB_DEVICE(0x046d, 0xc281) },		/* Logitech WingMan Force */
272	{ USB_DEVICE(0x046d, 0xc291) },		/* Logitech WingMan Formula Force */
273	{ USB_DEVICE(0x05ef, 0x020a) },		/* AVB Top Shot Pegasus */
274	{ USB_DEVICE(0x05ef, 0x8884) },		/* AVB Mag Turbo Force */
275	{ USB_DEVICE(0x05ef, 0x8888) },		/* AVB Top Shot FFB Racing Wheel */
276	{ USB_DEVICE(0x061c, 0xc0a4) },         /* ACT LABS Force RS */
277	{ USB_DEVICE(0x061c, 0xc084) },         /* ACT LABS Force RS */
278	{ USB_DEVICE(0x06a3, 0xff04) },		/* Saitek R440 Force Wheel */
279	{ USB_DEVICE(0x06f8, 0x0001) },		/* Guillemot Race Leader Force Feedback */
280	{ USB_DEVICE(0x06f8, 0x0003) },		/* Guillemot Jet Leader Force Feedback */
281	{ USB_DEVICE(0x06f8, 0x0004) },		/* Guillemot Force Feedback Racing Wheel */
282	{ USB_DEVICE(0x06f8, 0xa302) },		/* Guillemot Jet Leader 3D */
283	{ }					/* Terminating entry */
284};
285
286MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
287
288struct usb_driver iforce_usb_driver = {
289	.name =		"iforce",
290	.probe =	iforce_usb_probe,
291	.disconnect =	iforce_usb_disconnect,
292	.id_table =	iforce_usb_ids,
293};
294
295module_usb_driver(iforce_usb_driver);
296
297MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
298MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
299MODULE_LICENSE("GPL");
300