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
12 struct 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
__iforce_usb_xmit(struct iforce * iforce)23 static 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
29 guard(spinlock_irqsave)(&iforce->xmit_lock);
30
31 if (iforce->xmit.head == iforce->xmit.tail) {
32 iforce_clear_xmit_and_wake(iforce);
33 return;
34 }
35
36 ((char *)iforce_usb->out->transfer_buffer)[0] = iforce->xmit.buf[iforce->xmit.tail];
37 XMIT_INC(iforce->xmit.tail, 1);
38 n = iforce->xmit.buf[iforce->xmit.tail];
39 XMIT_INC(iforce->xmit.tail, 1);
40
41 iforce_usb->out->transfer_buffer_length = n + 1;
42 iforce_usb->out->dev = iforce_usb->usbdev;
43
44 /* Copy rest of data then */
45 c = CIRC_CNT_TO_END(iforce->xmit.head, iforce->xmit.tail, XMIT_SIZE);
46 if (n < c)
47 c = n;
48
49 memcpy(iforce_usb->out->transfer_buffer + 1,
50 &iforce->xmit.buf[iforce->xmit.tail],
51 c);
52 if (n != c) {
53 memcpy(iforce_usb->out->transfer_buffer + 1 + c,
54 &iforce->xmit.buf[0],
55 n - c);
56 }
57 XMIT_INC(iforce->xmit.tail, n);
58
59 n=usb_submit_urb(iforce_usb->out, GFP_ATOMIC);
60 if (n) {
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 }
70
iforce_usb_xmit(struct iforce * iforce)71 static void iforce_usb_xmit(struct iforce *iforce)
72 {
73 if (!test_and_set_bit(IFORCE_XMIT_RUNNING, iforce->xmit_flags))
74 __iforce_usb_xmit(iforce);
75 }
76
iforce_usb_get_id(struct iforce * iforce,u8 id,u8 * response_data,size_t * response_len)77 static int iforce_usb_get_id(struct iforce *iforce, u8 id,
78 u8 *response_data, size_t *response_len)
79 {
80 struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
81 iforce);
82 u8 *buf;
83 int status;
84
85 buf = kmalloc(IFORCE_MAX_LENGTH, GFP_KERNEL);
86 if (!buf)
87 return -ENOMEM;
88
89 status = usb_control_msg(iforce_usb->usbdev,
90 usb_rcvctrlpipe(iforce_usb->usbdev, 0),
91 id,
92 USB_TYPE_VENDOR | USB_DIR_IN |
93 USB_RECIP_INTERFACE,
94 0, 0, buf, IFORCE_MAX_LENGTH, 1000);
95 if (status < 0) {
96 dev_err(&iforce_usb->intf->dev,
97 "usb_submit_urb failed: %d\n", status);
98 } else if (buf[0] != id) {
99 status = -EIO;
100 } else {
101 memcpy(response_data, buf, status);
102 *response_len = status;
103 status = 0;
104 }
105
106 kfree(buf);
107 return status;
108 }
109
iforce_usb_start_io(struct iforce * iforce)110 static int iforce_usb_start_io(struct iforce *iforce)
111 {
112 struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
113 iforce);
114
115 if (usb_submit_urb(iforce_usb->irq, GFP_KERNEL))
116 return -EIO;
117
118 return 0;
119 }
120
iforce_usb_stop_io(struct iforce * iforce)121 static void iforce_usb_stop_io(struct iforce *iforce)
122 {
123 struct iforce_usb *iforce_usb = container_of(iforce, struct iforce_usb,
124 iforce);
125
126 usb_kill_urb(iforce_usb->irq);
127 usb_kill_urb(iforce_usb->out);
128 }
129
130 static const struct iforce_xport_ops iforce_usb_xport_ops = {
131 .xmit = iforce_usb_xmit,
132 .get_id = iforce_usb_get_id,
133 .start_io = iforce_usb_start_io,
134 .stop_io = iforce_usb_stop_io,
135 };
136
iforce_usb_irq(struct urb * urb)137 static void iforce_usb_irq(struct urb *urb)
138 {
139 struct iforce_usb *iforce_usb = urb->context;
140 struct iforce *iforce = &iforce_usb->iforce;
141 struct device *dev = &iforce_usb->intf->dev;
142 int status;
143
144 switch (urb->status) {
145 case 0:
146 /* success */
147 break;
148 case -ECONNRESET:
149 case -ENOENT:
150 case -ESHUTDOWN:
151 /* this urb is terminated, clean up */
152 dev_dbg(dev, "%s - urb shutting down with status: %d\n",
153 __func__, urb->status);
154 return;
155 default:
156 dev_dbg(dev, "%s - urb has status of: %d\n",
157 __func__, urb->status);
158 goto exit;
159 }
160
161 iforce_process_packet(iforce, iforce_usb->data_in[0],
162 iforce_usb->data_in + 1, urb->actual_length - 1);
163
164 exit:
165 status = usb_submit_urb(urb, GFP_ATOMIC);
166 if (status)
167 dev_err(dev, "%s - usb_submit_urb failed with result %d\n",
168 __func__, status);
169 }
170
iforce_usb_out(struct urb * urb)171 static void iforce_usb_out(struct urb *urb)
172 {
173 struct iforce_usb *iforce_usb = urb->context;
174 struct iforce *iforce = &iforce_usb->iforce;
175
176 if (urb->status) {
177 dev_dbg(&iforce_usb->intf->dev, "urb->status %d, exiting\n",
178 urb->status);
179 iforce_clear_xmit_and_wake(iforce);
180 return;
181 }
182
183 __iforce_usb_xmit(iforce);
184
185 wake_up_all(&iforce->wait);
186 }
187
iforce_usb_probe(struct usb_interface * intf,const struct usb_device_id * id)188 static int iforce_usb_probe(struct usb_interface *intf,
189 const struct usb_device_id *id)
190 {
191 struct usb_device *dev = interface_to_usbdev(intf);
192 struct usb_host_interface *interface;
193 struct usb_endpoint_descriptor *epirq, *epout;
194 struct iforce_usb *iforce_usb;
195 int err = -ENOMEM;
196
197 interface = intf->cur_altsetting;
198
199 if (interface->desc.bNumEndpoints < 2)
200 return -ENODEV;
201
202 epirq = &interface->endpoint[0].desc;
203 if (!usb_endpoint_is_int_in(epirq))
204 return -ENODEV;
205
206 epout = &interface->endpoint[1].desc;
207 if (!usb_endpoint_is_int_out(epout))
208 return -ENODEV;
209
210 iforce_usb = kzalloc(sizeof(*iforce_usb), GFP_KERNEL);
211 if (!iforce_usb)
212 goto fail;
213
214 iforce_usb->irq = usb_alloc_urb(0, GFP_KERNEL);
215 if (!iforce_usb->irq)
216 goto fail;
217
218 iforce_usb->out = usb_alloc_urb(0, GFP_KERNEL);
219 if (!iforce_usb->out)
220 goto fail;
221
222 iforce_usb->iforce.xport_ops = &iforce_usb_xport_ops;
223
224 iforce_usb->usbdev = dev;
225 iforce_usb->intf = intf;
226
227 usb_fill_int_urb(iforce_usb->irq, dev,
228 usb_rcvintpipe(dev, epirq->bEndpointAddress),
229 iforce_usb->data_in, sizeof(iforce_usb->data_in),
230 iforce_usb_irq, iforce_usb, epirq->bInterval);
231
232 usb_fill_int_urb(iforce_usb->out, dev,
233 usb_sndintpipe(dev, epout->bEndpointAddress),
234 iforce_usb->data_out, sizeof(iforce_usb->data_out),
235 iforce_usb_out, iforce_usb, epout->bInterval);
236
237 err = iforce_init_device(&intf->dev, BUS_USB, &iforce_usb->iforce);
238 if (err)
239 goto fail;
240
241 usb_set_intfdata(intf, iforce_usb);
242 return 0;
243
244 fail:
245 if (iforce_usb) {
246 usb_free_urb(iforce_usb->irq);
247 usb_free_urb(iforce_usb->out);
248 kfree(iforce_usb);
249 }
250
251 return err;
252 }
253
iforce_usb_disconnect(struct usb_interface * intf)254 static void iforce_usb_disconnect(struct usb_interface *intf)
255 {
256 struct iforce_usb *iforce_usb = usb_get_intfdata(intf);
257
258 usb_set_intfdata(intf, NULL);
259
260 input_unregister_device(iforce_usb->iforce.dev);
261
262 usb_free_urb(iforce_usb->irq);
263 usb_free_urb(iforce_usb->out);
264
265 kfree(iforce_usb);
266 }
267
268 static const struct usb_device_id iforce_usb_ids[] = {
269 { USB_DEVICE(0x044f, 0xa01c) }, /* Thrustmaster Motor Sport GT */
270 { USB_DEVICE(0x046d, 0xc281) }, /* Logitech WingMan Force */
271 { USB_DEVICE(0x046d, 0xc291) }, /* Logitech WingMan Formula Force */
272 { USB_DEVICE(0x05ef, 0x020a) }, /* AVB Top Shot Pegasus */
273 { USB_DEVICE(0x05ef, 0x8884) }, /* AVB Mag Turbo Force */
274 { USB_DEVICE(0x05ef, 0x8888) }, /* AVB Top Shot FFB Racing Wheel */
275 { USB_DEVICE(0x061c, 0xc0a4) }, /* ACT LABS Force RS */
276 { USB_DEVICE(0x061c, 0xc084) }, /* ACT LABS Force RS */
277 { USB_DEVICE(0x06a3, 0xff04) }, /* Saitek R440 Force Wheel */
278 { USB_DEVICE(0x06f8, 0x0001) }, /* Guillemot Race Leader Force Feedback */
279 { USB_DEVICE(0x06f8, 0x0003) }, /* Guillemot Jet Leader Force Feedback */
280 { USB_DEVICE(0x06f8, 0x0004) }, /* Guillemot Force Feedback Racing Wheel */
281 { USB_DEVICE(0x06f8, 0xa302) }, /* Guillemot Jet Leader 3D */
282 { } /* Terminating entry */
283 };
284
285 MODULE_DEVICE_TABLE (usb, iforce_usb_ids);
286
287 struct usb_driver iforce_usb_driver = {
288 .name = "iforce",
289 .probe = iforce_usb_probe,
290 .disconnect = iforce_usb_disconnect,
291 .id_table = iforce_usb_ids,
292 };
293
294 module_usb_driver(iforce_usb_driver);
295
296 MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>");
297 MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver");
298 MODULE_LICENSE("GPL");
299