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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * When connected to the machine, the Thrustmaster wheels appear as
4 * a «generic» hid gamepad called "Thrustmaster FFB Wheel".
5 *
6 * When in this mode not every functionality of the wheel, like the force feedback,
7 * are available. To enable all functionalities of a Thrustmaster wheel we have to send
8 * to it a specific USB CONTROL request with a code different for each wheel.
9 *
10 * This driver tries to understand which model of Thrustmaster wheel the generic
11 * "Thrustmaster FFB Wheel" really is and then sends the appropriate control code.
12 *
13 * Copyright (c) 2020-2021 Dario Pagani <dario.pagani.146+linuxk@gmail.com>
14 * Copyright (c) 2020-2021 Kim Kuparinen <kimi.h.kuparinen@gmail.com>
15 */
16#include <linux/hid.h>
17#include <linux/usb.h>
18#include <linux/input.h>
19#include <linux/slab.h>
20#include <linux/module.h>
21
22/*
23 * These interrupts are used to prevent a nasty crash when initializing the
24 * T300RS. Used in thrustmaster_interrupts().
25 */
26static const u8 setup_0[] = { 0x42, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
27static const u8 setup_1[] = { 0x0a, 0x04, 0x90, 0x03, 0x00, 0x00, 0x00, 0x00 };
28static const u8 setup_2[] = { 0x0a, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00 };
29static const u8 setup_3[] = { 0x0a, 0x04, 0x12, 0x10, 0x00, 0x00, 0x00, 0x00 };
30static const u8 setup_4[] = { 0x0a, 0x04, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00 };
31static const u8 *const setup_arr[] = { setup_0, setup_1, setup_2, setup_3, setup_4 };
32static const unsigned int setup_arr_sizes[] = {
33 ARRAY_SIZE(setup_0),
34 ARRAY_SIZE(setup_1),
35 ARRAY_SIZE(setup_2),
36 ARRAY_SIZE(setup_3),
37 ARRAY_SIZE(setup_4)
38};
39/*
40 * This struct contains for each type of
41 * Thrustmaster wheel
42 *
43 * Note: The values are stored in the CPU
44 * endianness, the USB protocols always use
45 * little endian; the macro cpu_to_le[BIT]()
46 * must be used when preparing USB packets
47 * and vice-versa
48 */
49struct tm_wheel_info {
50 uint16_t wheel_type;
51
52 /*
53 * See when the USB control out packet is prepared...
54 * @TODO The TMX seems to require multiple control codes to switch.
55 */
56 uint16_t switch_value;
57
58 char const *const wheel_name;
59};
60
61/*
62 * Known wheels.
63 * Note: TMX does not work as it requires 2 control packets
64 */
65static const struct tm_wheel_info tm_wheels_infos[] = {
66 {0x0306, 0x0006, "Thrustmaster T150RS"},
67 {0x0200, 0x0005, "Thrustmaster T300RS (Missing Attachment)"},
68 {0x0206, 0x0005, "Thrustmaster T300RS"},
69 {0x0209, 0x0005, "Thrustmaster T300RS (Open Wheel Attachment)"},
70 {0x020a, 0x0005, "Thrustmaster T300RS (Sparco R383 Mod)"},
71 {0x0204, 0x0005, "Thrustmaster T300 Ferrari Alcantara Edition"},
72 {0x0002, 0x0002, "Thrustmaster T500RS"}
73 //{0x0407, 0x0001, "Thrustmaster TMX"}
74};
75
76static const uint8_t tm_wheels_infos_length = 7;
77
78/*
79 * This structs contains (in little endian) the response data
80 * of the wheel to the request 73
81 *
82 * A sufficient research to understand what each field does is not
83 * beign conducted yet. The position and meaning of fields are a
84 * just a very optimistic guess based on instinct....
85 */
86struct __packed tm_wheel_response
87{
88 /*
89 * Seems to be the type of packet
90 * - 0x0049 if is data.a (15 bytes)
91 * - 0x0047 if is data.b (7 bytes)
92 */
93 uint16_t type;
94
95 union {
96 struct __packed {
97 uint16_t field0;
98 uint16_t field1;
99 /*
100 * Seems to be the model code of the wheel
101 * Read table thrustmaster_wheels to values
102 */
103 uint16_t model;
104
105 uint16_t field2;
106 uint16_t field3;
107 uint16_t field4;
108 uint16_t field5;
109 } a;
110 struct __packed {
111 uint16_t field0;
112 uint16_t field1;
113 uint16_t model;
114 } b;
115 } data;
116};
117
118struct tm_wheel {
119 struct usb_device *usb_dev;
120 struct urb *urb;
121
122 struct usb_ctrlrequest *model_request;
123 struct tm_wheel_response *response;
124
125 struct usb_ctrlrequest *change_request;
126};
127
128/* The control packet to send to wheel */
129static const struct usb_ctrlrequest model_request = {
130 .bRequestType = 0xc1,
131 .bRequest = 73,
132 .wValue = 0,
133 .wIndex = 0,
134 .wLength = cpu_to_le16(0x0010)
135};
136
137static const struct usb_ctrlrequest change_request = {
138 .bRequestType = 0x41,
139 .bRequest = 83,
140 .wValue = 0, // Will be filled by the driver
141 .wIndex = 0,
142 .wLength = 0
143};
144
145/*
146 * On some setups initializing the T300RS crashes the kernel,
147 * these interrupts fix that particular issue. So far they haven't caused any
148 * adverse effects in other wheels.
149 */
150static void thrustmaster_interrupts(struct hid_device *hdev)
151{
152 int ret, trans, i, b_ep;
153 u8 *send_buf = kmalloc(256, GFP_KERNEL);
154 struct usb_host_endpoint *ep;
155 struct device *dev = &hdev->dev;
156 struct usb_interface *usbif = to_usb_interface(dev->parent);
157 struct usb_device *usbdev = interface_to_usbdev(usbif);
158
159 if (!send_buf) {
160 hid_err(hdev, "failed allocating send buffer\n");
161 return;
162 }
163
164 if (usbif->cur_altsetting->desc.bNumEndpoints < 2) {
165 kfree(send_buf);
166 hid_err(hdev, "Wrong number of endpoints?\n");
167 return;
168 }
169
170 ep = &usbif->cur_altsetting->endpoint[1];
171 b_ep = ep->desc.bEndpointAddress;
172
173 for (i = 0; i < ARRAY_SIZE(setup_arr); ++i) {
174 memcpy(send_buf, setup_arr[i], setup_arr_sizes[i]);
175
176 ret = usb_interrupt_msg(usbdev,
177 usb_sndintpipe(usbdev, b_ep),
178 send_buf,
179 setup_arr_sizes[i],
180 &trans,
181 USB_CTRL_SET_TIMEOUT);
182
183 if (ret) {
184 hid_err(hdev, "setup data couldn't be sent\n");
185 kfree(send_buf);
186 return;
187 }
188 }
189
190 kfree(send_buf);
191}
192
193static void thrustmaster_change_handler(struct urb *urb)
194{
195 struct hid_device *hdev = urb->context;
196
197 // The wheel seems to kill himself before answering the host and therefore is violating the USB protocol...
198 if (urb->status == 0 || urb->status == -EPROTO || urb->status == -EPIPE)
199 hid_info(hdev, "Success?! The wheel should have been initialized!\n");
200 else
201 hid_warn(hdev, "URB to change wheel mode seems to have failed with error %d\n", urb->status);
202}
203
204/*
205 * Called by the USB subsystem when the wheel responses to our request
206 * to get [what it seems to be] the wheel's model.
207 *
208 * If the model id is recognized then we send an opportune USB CONTROL REQUEST
209 * to switch the wheel to its full capabilities
210 */
211static void thrustmaster_model_handler(struct urb *urb)
212{
213 struct hid_device *hdev = urb->context;
214 struct tm_wheel *tm_wheel = hid_get_drvdata(hdev);
215 uint16_t model = 0;
216 int i, ret;
217 const struct tm_wheel_info *twi = NULL;
218
219 if (urb->status) {
220 hid_err(hdev, "URB to get model id failed with error %d\n", urb->status);
221 return;
222 }
223
224 if (tm_wheel->response->type == cpu_to_le16(0x49))
225 model = le16_to_cpu(tm_wheel->response->data.a.model);
226 else if (tm_wheel->response->type == cpu_to_le16(0x47))
227 model = le16_to_cpu(tm_wheel->response->data.b.model);
228 else {
229 hid_err(hdev, "Unknown packet type 0x%x, unable to proceed further with wheel init\n", tm_wheel->response->type);
230 return;
231 }
232
233 for (i = 0; i < tm_wheels_infos_length && !twi; i++)
234 if (tm_wheels_infos[i].wheel_type == model)
235 twi = tm_wheels_infos + i;
236
237 if (twi)
238 hid_info(hdev, "Wheel with model id 0x%x is a %s\n", model, twi->wheel_name);
239 else {
240 hid_err(hdev, "Unknown wheel's model id 0x%x, unable to proceed further with wheel init\n", model);
241 return;
242 }
243
244 tm_wheel->change_request->wValue = cpu_to_le16(twi->switch_value);
245 usb_fill_control_urb(
246 tm_wheel->urb,
247 tm_wheel->usb_dev,
248 usb_sndctrlpipe(tm_wheel->usb_dev, 0),
249 (char *)tm_wheel->change_request,
250 NULL, 0, // We do not expect any response from the wheel
251 thrustmaster_change_handler,
252 hdev
253 );
254
255 ret = usb_submit_urb(tm_wheel->urb, GFP_ATOMIC);
256 if (ret)
257 hid_err(hdev, "Error %d while submitting the change URB. I am unable to initialize this wheel...\n", ret);
258}
259
260static void thrustmaster_remove(struct hid_device *hdev)
261{
262 struct tm_wheel *tm_wheel = hid_get_drvdata(hdev);
263
264 usb_kill_urb(tm_wheel->urb);
265
266 kfree(tm_wheel->change_request);
267 kfree(tm_wheel->response);
268 kfree(tm_wheel->model_request);
269 usb_free_urb(tm_wheel->urb);
270 kfree(tm_wheel);
271
272 hid_hw_stop(hdev);
273}
274
275/*
276 * Function called by HID when a hid Thrustmaster FFB wheel is connected to the host.
277 * This function starts the hid dev, tries to allocate the tm_wheel data structure and
278 * finally send an USB CONTROL REQUEST to the wheel to get [what it seems to be] its
279 * model type.
280 */
281static int thrustmaster_probe(struct hid_device *hdev, const struct hid_device_id *id)
282{
283 int ret = 0;
284 struct tm_wheel *tm_wheel = NULL;
285
286 if (!hid_is_usb(hdev))
287 return -EINVAL;
288
289 ret = hid_parse(hdev);
290 if (ret) {
291 hid_err(hdev, "parse failed with error %d\n", ret);
292 goto error0;
293 }
294
295 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
296 if (ret) {
297 hid_err(hdev, "hw start failed with error %d\n", ret);
298 goto error0;
299 }
300
301 // Now we allocate the tm_wheel
302 tm_wheel = kzalloc(sizeof(struct tm_wheel), GFP_KERNEL);
303 if (!tm_wheel) {
304 ret = -ENOMEM;
305 goto error1;
306 }
307
308 tm_wheel->urb = usb_alloc_urb(0, GFP_ATOMIC);
309 if (!tm_wheel->urb) {
310 ret = -ENOMEM;
311 goto error2;
312 }
313
314 tm_wheel->model_request = kmemdup(&model_request,
315 sizeof(struct usb_ctrlrequest),
316 GFP_KERNEL);
317 if (!tm_wheel->model_request) {
318 ret = -ENOMEM;
319 goto error3;
320 }
321
322 tm_wheel->response = kzalloc(sizeof(struct tm_wheel_response), GFP_KERNEL);
323 if (!tm_wheel->response) {
324 ret = -ENOMEM;
325 goto error4;
326 }
327
328 tm_wheel->change_request = kmemdup(&change_request,
329 sizeof(struct usb_ctrlrequest),
330 GFP_KERNEL);
331 if (!tm_wheel->change_request) {
332 ret = -ENOMEM;
333 goto error5;
334 }
335
336 tm_wheel->usb_dev = interface_to_usbdev(to_usb_interface(hdev->dev.parent));
337 hid_set_drvdata(hdev, tm_wheel);
338
339 thrustmaster_interrupts(hdev);
340
341 usb_fill_control_urb(
342 tm_wheel->urb,
343 tm_wheel->usb_dev,
344 usb_rcvctrlpipe(tm_wheel->usb_dev, 0),
345 (char *)tm_wheel->model_request,
346 tm_wheel->response,
347 sizeof(struct tm_wheel_response),
348 thrustmaster_model_handler,
349 hdev
350 );
351
352 ret = usb_submit_urb(tm_wheel->urb, GFP_ATOMIC);
353 if (ret) {
354 hid_err(hdev, "Error %d while submitting the URB. I am unable to initialize this wheel...\n", ret);
355 goto error6;
356 }
357
358 return ret;
359
360error6: kfree(tm_wheel->change_request);
361error5: kfree(tm_wheel->response);
362error4: kfree(tm_wheel->model_request);
363error3: usb_free_urb(tm_wheel->urb);
364error2: kfree(tm_wheel);
365error1: hid_hw_stop(hdev);
366error0:
367 return ret;
368}
369
370static const struct hid_device_id thrustmaster_devices[] = {
371 { HID_USB_DEVICE(0x044f, 0xb65d)},
372 {}
373};
374
375MODULE_DEVICE_TABLE(hid, thrustmaster_devices);
376
377static struct hid_driver thrustmaster_driver = {
378 .name = "hid-thrustmaster",
379 .id_table = thrustmaster_devices,
380 .probe = thrustmaster_probe,
381 .remove = thrustmaster_remove,
382};
383
384module_hid_driver(thrustmaster_driver);
385
386MODULE_AUTHOR("Dario Pagani <dario.pagani.146+linuxk@gmail.com>");
387MODULE_LICENSE("GPL");
388MODULE_DESCRIPTION("Driver to initialize some steering wheel joysticks from Thrustmaster");
389
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * When connected to the machine, the Thrustmaster wheels appear as
4 * a «generic» hid gamepad called "Thrustmaster FFB Wheel".
5 *
6 * When in this mode not every functionality of the wheel, like the force feedback,
7 * are available. To enable all functionalities of a Thrustmaster wheel we have to send
8 * to it a specific USB CONTROL request with a code different for each wheel.
9 *
10 * This driver tries to understand which model of Thrustmaster wheel the generic
11 * "Thrustmaster FFB Wheel" really is and then sends the appropriate control code.
12 *
13 * Copyright (c) 2020-2021 Dario Pagani <dario.pagani.146+linuxk@gmail.com>
14 * Copyright (c) 2020-2021 Kim Kuparinen <kimi.h.kuparinen@gmail.com>
15 */
16#include <linux/hid.h>
17#include <linux/usb.h>
18#include <linux/input.h>
19#include <linux/slab.h>
20#include <linux/module.h>
21
22/*
23 * These interrupts are used to prevent a nasty crash when initializing the
24 * T300RS. Used in thrustmaster_interrupts().
25 */
26static const u8 setup_0[] = { 0x42, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
27static const u8 setup_1[] = { 0x0a, 0x04, 0x90, 0x03, 0x00, 0x00, 0x00, 0x00 };
28static const u8 setup_2[] = { 0x0a, 0x04, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00 };
29static const u8 setup_3[] = { 0x0a, 0x04, 0x12, 0x10, 0x00, 0x00, 0x00, 0x00 };
30static const u8 setup_4[] = { 0x0a, 0x04, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00 };
31static const u8 *const setup_arr[] = { setup_0, setup_1, setup_2, setup_3, setup_4 };
32static const unsigned int setup_arr_sizes[] = {
33 ARRAY_SIZE(setup_0),
34 ARRAY_SIZE(setup_1),
35 ARRAY_SIZE(setup_2),
36 ARRAY_SIZE(setup_3),
37 ARRAY_SIZE(setup_4)
38};
39/*
40 * This struct contains for each type of
41 * Thrustmaster wheel
42 *
43 * Note: The values are stored in the CPU
44 * endianness, the USB protocols always use
45 * little endian; the macro cpu_to_le[BIT]()
46 * must be used when preparing USB packets
47 * and vice-versa
48 */
49struct tm_wheel_info {
50 uint16_t wheel_type;
51
52 /*
53 * See when the USB control out packet is prepared...
54 * @TODO The TMX seems to require multiple control codes to switch.
55 */
56 uint16_t switch_value;
57
58 char const *const wheel_name;
59};
60
61/*
62 * Known wheels.
63 * Note: TMX does not work as it requires 2 control packets
64 */
65static const struct tm_wheel_info tm_wheels_infos[] = {
66 {0x0306, 0x0006, "Thrustmaster T150RS"},
67 {0x0206, 0x0005, "Thrustmaster T300RS"},
68 {0x0204, 0x0005, "Thrustmaster T300 Ferrari Alcantara Edition"},
69 {0x0002, 0x0002, "Thrustmaster T500RS"}
70 //{0x0407, 0x0001, "Thrustmaster TMX"}
71};
72
73static const uint8_t tm_wheels_infos_length = 4;
74
75/*
76 * This structs contains (in little endian) the response data
77 * of the wheel to the request 73
78 *
79 * A sufficient research to understand what each field does is not
80 * beign conducted yet. The position and meaning of fields are a
81 * just a very optimistic guess based on instinct....
82 */
83struct __packed tm_wheel_response
84{
85 /*
86 * Seems to be the type of packet
87 * - 0x0049 if is data.a (15 bytes)
88 * - 0x0047 if is data.b (7 bytes)
89 */
90 uint16_t type;
91
92 union {
93 struct __packed {
94 uint16_t field0;
95 uint16_t field1;
96 /*
97 * Seems to be the model code of the wheel
98 * Read table thrustmaster_wheels to values
99 */
100 uint16_t model;
101
102 uint16_t field2;
103 uint16_t field3;
104 uint16_t field4;
105 uint16_t field5;
106 } a;
107 struct __packed {
108 uint16_t field0;
109 uint16_t field1;
110 uint16_t model;
111 } b;
112 } data;
113};
114
115struct tm_wheel {
116 struct usb_device *usb_dev;
117 struct urb *urb;
118
119 struct usb_ctrlrequest *model_request;
120 struct tm_wheel_response *response;
121
122 struct usb_ctrlrequest *change_request;
123};
124
125/* The control packet to send to wheel */
126static const struct usb_ctrlrequest model_request = {
127 .bRequestType = 0xc1,
128 .bRequest = 73,
129 .wValue = 0,
130 .wIndex = 0,
131 .wLength = cpu_to_le16(0x0010)
132};
133
134static const struct usb_ctrlrequest change_request = {
135 .bRequestType = 0x41,
136 .bRequest = 83,
137 .wValue = 0, // Will be filled by the driver
138 .wIndex = 0,
139 .wLength = 0
140};
141
142/*
143 * On some setups initializing the T300RS crashes the kernel,
144 * these interrupts fix that particular issue. So far they haven't caused any
145 * adverse effects in other wheels.
146 */
147static void thrustmaster_interrupts(struct hid_device *hdev)
148{
149 int ret, trans, i, b_ep;
150 u8 *send_buf = kmalloc(256, GFP_KERNEL);
151 struct usb_host_endpoint *ep;
152 struct device *dev = &hdev->dev;
153 struct usb_interface *usbif = to_usb_interface(dev->parent);
154 struct usb_device *usbdev = interface_to_usbdev(usbif);
155
156 if (!send_buf) {
157 hid_err(hdev, "failed allocating send buffer\n");
158 return;
159 }
160
161 ep = &usbif->cur_altsetting->endpoint[1];
162 b_ep = ep->desc.bEndpointAddress;
163
164 for (i = 0; i < ARRAY_SIZE(setup_arr); ++i) {
165 memcpy(send_buf, setup_arr[i], setup_arr_sizes[i]);
166
167 ret = usb_interrupt_msg(usbdev,
168 usb_sndintpipe(usbdev, b_ep),
169 send_buf,
170 setup_arr_sizes[i],
171 &trans,
172 USB_CTRL_SET_TIMEOUT);
173
174 if (ret) {
175 hid_err(hdev, "setup data couldn't be sent\n");
176 return;
177 }
178 }
179
180 kfree(send_buf);
181}
182
183static void thrustmaster_change_handler(struct urb *urb)
184{
185 struct hid_device *hdev = urb->context;
186
187 // The wheel seems to kill himself before answering the host and therefore is violating the USB protocol...
188 if (urb->status == 0 || urb->status == -EPROTO || urb->status == -EPIPE)
189 hid_info(hdev, "Success?! The wheel should have been initialized!\n");
190 else
191 hid_warn(hdev, "URB to change wheel mode seems to have failed with error %d\n", urb->status);
192}
193
194/*
195 * Called by the USB subsystem when the wheel responses to our request
196 * to get [what it seems to be] the wheel's model.
197 *
198 * If the model id is recognized then we send an opportune USB CONTROL REQUEST
199 * to switch the wheel to its full capabilities
200 */
201static void thrustmaster_model_handler(struct urb *urb)
202{
203 struct hid_device *hdev = urb->context;
204 struct tm_wheel *tm_wheel = hid_get_drvdata(hdev);
205 uint16_t model = 0;
206 int i, ret;
207 const struct tm_wheel_info *twi = 0;
208
209 if (urb->status) {
210 hid_err(hdev, "URB to get model id failed with error %d\n", urb->status);
211 return;
212 }
213
214 if (tm_wheel->response->type == cpu_to_le16(0x49))
215 model = le16_to_cpu(tm_wheel->response->data.a.model);
216 else if (tm_wheel->response->type == cpu_to_le16(0x47))
217 model = le16_to_cpu(tm_wheel->response->data.b.model);
218 else {
219 hid_err(hdev, "Unknown packet type 0x%x, unable to proceed further with wheel init\n", tm_wheel->response->type);
220 return;
221 }
222
223 for (i = 0; i < tm_wheels_infos_length && !twi; i++)
224 if (tm_wheels_infos[i].wheel_type == model)
225 twi = tm_wheels_infos + i;
226
227 if (twi)
228 hid_info(hdev, "Wheel with model id 0x%x is a %s\n", model, twi->wheel_name);
229 else {
230 hid_err(hdev, "Unknown wheel's model id 0x%x, unable to proceed further with wheel init\n", model);
231 return;
232 }
233
234 tm_wheel->change_request->wValue = cpu_to_le16(twi->switch_value);
235 usb_fill_control_urb(
236 tm_wheel->urb,
237 tm_wheel->usb_dev,
238 usb_sndctrlpipe(tm_wheel->usb_dev, 0),
239 (char *)tm_wheel->change_request,
240 0, 0, // We do not expect any response from the wheel
241 thrustmaster_change_handler,
242 hdev
243 );
244
245 ret = usb_submit_urb(tm_wheel->urb, GFP_ATOMIC);
246 if (ret)
247 hid_err(hdev, "Error %d while submitting the change URB. I am unable to initialize this wheel...\n", ret);
248}
249
250static void thrustmaster_remove(struct hid_device *hdev)
251{
252 struct tm_wheel *tm_wheel = hid_get_drvdata(hdev);
253
254 usb_kill_urb(tm_wheel->urb);
255
256 kfree(tm_wheel->response);
257 kfree(tm_wheel->model_request);
258 usb_free_urb(tm_wheel->urb);
259 kfree(tm_wheel);
260
261 hid_hw_stop(hdev);
262}
263
264/*
265 * Function called by HID when a hid Thrustmaster FFB wheel is connected to the host.
266 * This function starts the hid dev, tries to allocate the tm_wheel data structure and
267 * finally send an USB CONTROL REQUEST to the wheel to get [what it seems to be] its
268 * model type.
269 */
270static int thrustmaster_probe(struct hid_device *hdev, const struct hid_device_id *id)
271{
272 int ret = 0;
273 struct tm_wheel *tm_wheel = 0;
274
275 ret = hid_parse(hdev);
276 if (ret) {
277 hid_err(hdev, "parse failed with error %d\n", ret);
278 goto error0;
279 }
280
281 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF);
282 if (ret) {
283 hid_err(hdev, "hw start failed with error %d\n", ret);
284 goto error0;
285 }
286
287 // Now we allocate the tm_wheel
288 tm_wheel = kzalloc(sizeof(struct tm_wheel), GFP_KERNEL);
289 if (!tm_wheel) {
290 ret = -ENOMEM;
291 goto error1;
292 }
293
294 tm_wheel->urb = usb_alloc_urb(0, GFP_ATOMIC);
295 if (!tm_wheel->urb) {
296 ret = -ENOMEM;
297 goto error2;
298 }
299
300 tm_wheel->model_request = kmemdup(&model_request,
301 sizeof(struct usb_ctrlrequest),
302 GFP_KERNEL);
303 if (!tm_wheel->model_request) {
304 ret = -ENOMEM;
305 goto error3;
306 }
307
308 tm_wheel->response = kzalloc(sizeof(struct tm_wheel_response), GFP_KERNEL);
309 if (!tm_wheel->response) {
310 ret = -ENOMEM;
311 goto error4;
312 }
313
314 tm_wheel->change_request = kmemdup(&change_request,
315 sizeof(struct usb_ctrlrequest),
316 GFP_KERNEL);
317 if (!tm_wheel->change_request) {
318 ret = -ENOMEM;
319 goto error5;
320 }
321
322 tm_wheel->usb_dev = interface_to_usbdev(to_usb_interface(hdev->dev.parent));
323 hid_set_drvdata(hdev, tm_wheel);
324
325 thrustmaster_interrupts(hdev);
326
327 usb_fill_control_urb(
328 tm_wheel->urb,
329 tm_wheel->usb_dev,
330 usb_rcvctrlpipe(tm_wheel->usb_dev, 0),
331 (char *)tm_wheel->model_request,
332 tm_wheel->response,
333 sizeof(struct tm_wheel_response),
334 thrustmaster_model_handler,
335 hdev
336 );
337
338 ret = usb_submit_urb(tm_wheel->urb, GFP_ATOMIC);
339 if (ret)
340 hid_err(hdev, "Error %d while submitting the URB. I am unable to initialize this wheel...\n", ret);
341
342 return ret;
343
344error5: kfree(tm_wheel->response);
345error4: kfree(tm_wheel->model_request);
346error3: usb_free_urb(tm_wheel->urb);
347error2: kfree(tm_wheel);
348error1: hid_hw_stop(hdev);
349error0:
350 return ret;
351}
352
353static const struct hid_device_id thrustmaster_devices[] = {
354 { HID_USB_DEVICE(0x044f, 0xb65d)},
355 {}
356};
357
358MODULE_DEVICE_TABLE(hid, thrustmaster_devices);
359
360static struct hid_driver thrustmaster_driver = {
361 .name = "hid-thrustmaster",
362 .id_table = thrustmaster_devices,
363 .probe = thrustmaster_probe,
364 .remove = thrustmaster_remove,
365};
366
367module_hid_driver(thrustmaster_driver);
368
369MODULE_AUTHOR("Dario Pagani <dario.pagani.146+linuxk@gmail.com>");
370MODULE_LICENSE("GPL");
371MODULE_DESCRIPTION("Driver to initialize some steering wheel joysticks from Thrustmaster");
372