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 | |
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 | 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(lock: &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(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(lock: &iforce->xmit_lock, flags); |
70 | } |
71 | |
72 | static void iforce_usb_xmit(struct iforce *iforce) |
73 | { |
74 | if (!test_and_set_bit(IFORCE_XMIT_RUNNING, addr: iforce->xmit_flags)) |
75 | __iforce_usb_xmit(iforce); |
76 | } |
77 | |
78 | static 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(dev: iforce_usb->usbdev, |
91 | usb_rcvctrlpipe(iforce_usb->usbdev, 0), |
92 | request: id, |
93 | USB_TYPE_VENDOR | USB_DIR_IN | |
94 | USB_RECIP_INTERFACE, |
95 | value: 0, index: 0, data: buf, IFORCE_MAX_LENGTH, timeout: 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(objp: buf); |
108 | return status; |
109 | } |
110 | |
111 | static 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(urb: iforce_usb->irq, GFP_KERNEL)) |
117 | return -EIO; |
118 | |
119 | return 0; |
120 | } |
121 | |
122 | static 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(urb: iforce_usb->irq); |
128 | usb_kill_urb(urb: iforce_usb->out); |
129 | } |
130 | |
131 | static 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 | |
138 | static 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, packet_id: iforce_usb->data_in[0], |
163 | data: iforce_usb->data_in + 1, len: urb->actual_length - 1); |
164 | |
165 | exit: |
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 | |
172 | static 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 | |
189 | static 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(epd: epirq)) |
205 | return -ENODEV; |
206 | |
207 | epout = &interface->endpoint[1].desc; |
208 | if (!usb_endpoint_is_int_out(epd: epout)) |
209 | return -ENODEV; |
210 | |
211 | iforce_usb = kzalloc(size: sizeof(*iforce_usb), GFP_KERNEL); |
212 | if (!iforce_usb) |
213 | goto fail; |
214 | |
215 | iforce_usb->irq = usb_alloc_urb(iso_packets: 0, GFP_KERNEL); |
216 | if (!iforce_usb->irq) |
217 | goto fail; |
218 | |
219 | iforce_usb->out = usb_alloc_urb(iso_packets: 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(urb: iforce_usb->irq, dev, |
229 | usb_rcvintpipe(dev, epirq->bEndpointAddress), |
230 | transfer_buffer: iforce_usb->data_in, buffer_length: sizeof(iforce_usb->data_in), |
231 | complete_fn: iforce_usb_irq, context: iforce_usb, interval: epirq->bInterval); |
232 | |
233 | usb_fill_int_urb(urb: iforce_usb->out, dev, |
234 | usb_sndintpipe(dev, epout->bEndpointAddress), |
235 | transfer_buffer: iforce_usb->data_out, buffer_length: sizeof(iforce_usb->data_out), |
236 | complete_fn: iforce_usb_out, context: iforce_usb, interval: epout->bInterval); |
237 | |
238 | err = iforce_init_device(parent: &intf->dev, BUS_USB, iforce: &iforce_usb->iforce); |
239 | if (err) |
240 | goto fail; |
241 | |
242 | usb_set_intfdata(intf, data: iforce_usb); |
243 | return 0; |
244 | |
245 | fail: |
246 | if (iforce_usb) { |
247 | usb_free_urb(urb: iforce_usb->irq); |
248 | usb_free_urb(urb: iforce_usb->out); |
249 | kfree(objp: iforce_usb); |
250 | } |
251 | |
252 | return err; |
253 | } |
254 | |
255 | static 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(urb: iforce_usb->irq); |
264 | usb_free_urb(urb: iforce_usb->out); |
265 | |
266 | kfree(objp: iforce_usb); |
267 | } |
268 | |
269 | static 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 | |
286 | MODULE_DEVICE_TABLE (usb, iforce_usb_ids); |
287 | |
288 | struct 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 | |
295 | module_usb_driver(iforce_usb_driver); |
296 | |
297 | MODULE_AUTHOR("Vojtech Pavlik <vojtech@ucw.cz>, Johann Deneux <johann.deneux@gmail.com>" ); |
298 | MODULE_DESCRIPTION("USB I-Force joysticks and wheels driver" ); |
299 | MODULE_LICENSE("GPL" ); |
300 | |