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authorJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
committerJonathan Herman <hermanjl@cs.unc.edu>2013-01-17 16:15:55 -0500
commit8dea78da5cee153b8af9c07a2745f6c55057fe12 (patch)
treea8f4d49d63b1ecc92f2fddceba0655b2472c5bd9 /drivers/hid/hid-lg4ff.c
parent406089d01562f1e2bf9f089fd7637009ebaad589 (diff)
Patched in Tegra support.
Diffstat (limited to 'drivers/hid/hid-lg4ff.c')
-rw-r--r--drivers/hid/hid-lg4ff.c645
1 files changed, 32 insertions, 613 deletions
diff --git a/drivers/hid/hid-lg4ff.c b/drivers/hid/hid-lg4ff.c
index d7947c701f3..fa550c8e1d1 100644
--- a/drivers/hid/hid-lg4ff.c
+++ b/drivers/hid/hid-lg4ff.c
@@ -1,8 +1,7 @@
1/* 1/*
2 * Force feedback support for Logitech Gaming Wheels 2 * Force feedback support for Logitech Speed Force Wireless
3 * 3 *
4 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 & 4 * http://wiibrew.org/wiki/Logitech_USB_steering_wheel
5 * Speed Force Wireless (WiiWheel)
6 * 5 *
7 * Copyright (c) 2010 Simon Wood <simon@mungewell.org> 6 * Copyright (c) 2010 Simon Wood <simon@mungewell.org>
8 */ 7 */
@@ -30,182 +29,39 @@
30 29
31#include "usbhid/usbhid.h" 30#include "usbhid/usbhid.h"
32#include "hid-lg.h" 31#include "hid-lg.h"
33#include "hid-ids.h"
34 32
35#define DFGT_REV_MAJ 0x13 33struct lg4ff_device {
36#define DFGT_REV_MIN 0x22 34 struct hid_report *report;
37#define DFP_REV_MAJ 0x11
38#define DFP_REV_MIN 0x06
39#define FFEX_REV_MAJ 0x21
40#define FFEX_REV_MIN 0x00
41#define G25_REV_MAJ 0x12
42#define G25_REV_MIN 0x22
43#define G27_REV_MAJ 0x12
44#define G27_REV_MIN 0x38
45
46#define DFP_X_MIN 0
47#define DFP_X_MAX 16383
48#define DFP_PEDAL_MIN 0
49#define DFP_PEDAL_MAX 255
50
51#define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
52
53static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
54static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
55static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
56static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
57
58static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
59
60struct lg4ff_device_entry {
61 __u32 product_id;
62 __u16 range;
63 __u16 min_range;
64 __u16 max_range;
65#ifdef CONFIG_LEDS_CLASS
66 __u8 led_state;
67 struct led_classdev *led[5];
68#endif
69 struct list_head list;
70 void (*set_range)(struct hid_device *hid, u16 range);
71}; 35};
72 36
73static const signed short lg4ff_wheel_effects[] = { 37static const signed short ff4_wheel_ac[] = {
74 FF_CONSTANT, 38 FF_CONSTANT,
75 FF_AUTOCENTER, 39 FF_AUTOCENTER,
76 -1 40 -1
77}; 41};
78 42
79struct lg4ff_wheel { 43static int hid_lg4ff_play(struct input_dev *dev, void *data,
80 const __u32 product_id; 44 struct ff_effect *effect)
81 const signed short *ff_effects;
82 const __u16 min_range;
83 const __u16 max_range;
84 void (*set_range)(struct hid_device *hid, u16 range);
85};
86
87static const struct lg4ff_wheel lg4ff_devices[] = {
88 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
89 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
90 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
91 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
92 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
93 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
94 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
95 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
96};
97
98struct lg4ff_native_cmd {
99 const __u8 cmd_num; /* Number of commands to send */
100 const __u8 cmd[];
101};
102
103struct lg4ff_usb_revision {
104 const __u16 rev_maj;
105 const __u16 rev_min;
106 const struct lg4ff_native_cmd *command;
107};
108
109static const struct lg4ff_native_cmd native_dfp = {
110 1,
111 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
112};
113
114static const struct lg4ff_native_cmd native_dfgt = {
115 2,
116 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
117 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
118};
119
120static const struct lg4ff_native_cmd native_g25 = {
121 1,
122 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
123};
124
125static const struct lg4ff_native_cmd native_g27 = {
126 2,
127 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* 1st command */
128 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* 2nd command */
129};
130
131static const struct lg4ff_usb_revision lg4ff_revs[] = {
132 {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt}, /* Driving Force GT */
133 {DFP_REV_MAJ, DFP_REV_MIN, &native_dfp}, /* Driving Force Pro */
134 {G25_REV_MAJ, G25_REV_MIN, &native_g25}, /* G25 */
135 {G27_REV_MAJ, G27_REV_MIN, &native_g27}, /* G27 */
136};
137
138/* Recalculates X axis value accordingly to currently selected range */
139static __s32 lg4ff_adjust_dfp_x_axis(__s32 value, __u16 range)
140{
141 __u16 max_range;
142 __s32 new_value;
143
144 if (range == 900)
145 return value;
146 else if (range == 200)
147 return value;
148 else if (range < 200)
149 max_range = 200;
150 else
151 max_range = 900;
152
153 new_value = 8192 + mult_frac(value - 8192, max_range, range);
154 if (new_value < 0)
155 return 0;
156 else if (new_value > 16383)
157 return 16383;
158 else
159 return new_value;
160}
161
162int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
163 struct hid_usage *usage, __s32 value, struct lg_drv_data *drv_data)
164{
165 struct lg4ff_device_entry *entry = drv_data->device_props;
166 __s32 new_value = 0;
167
168 if (!entry) {
169 hid_err(hid, "Device properties not found");
170 return 0;
171 }
172
173 switch (entry->product_id) {
174 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
175 switch (usage->code) {
176 case ABS_X:
177 new_value = lg4ff_adjust_dfp_x_axis(value, entry->range);
178 input_event(field->hidinput->input, usage->type, usage->code, new_value);
179 return 1;
180 default:
181 return 0;
182 }
183 default:
184 return 0;
185 }
186}
187
188static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
189{ 45{
190 struct hid_device *hid = input_get_drvdata(dev); 46 struct hid_device *hid = input_get_drvdata(dev);
191 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 47 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
192 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 48 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
193 __s32 *value = report->field[0]->value;
194 int x; 49 int x;
195 50
196#define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0) 51#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
197 52
198 switch (effect->type) { 53 switch (effect->type) {
199 case FF_CONSTANT: 54 case FF_CONSTANT:
200 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */ 55 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
201 CLAMP(x); 56 CLAMP(x);
202 value[0] = 0x11; /* Slot 1 */ 57 report->field[0]->value[0] = 0x11; /* Slot 1 */
203 value[1] = 0x08; 58 report->field[0]->value[1] = 0x10;
204 value[2] = x; 59 report->field[0]->value[2] = x;
205 value[3] = 0x80; 60 report->field[0]->value[3] = 0x00;
206 value[4] = 0x00; 61 report->field[0]->value[4] = 0x00;
207 value[5] = 0x00; 62 report->field[0]->value[5] = 0x08;
208 value[6] = 0x00; 63 report->field[0]->value[6] = 0x00;
64 dbg_hid("Autocenter, x=0x%02X\n", x);
209 65
210 usbhid_submit_report(hid, report, USB_DIR_OUT); 66 usbhid_submit_report(hid, report, USB_DIR_OUT);
211 break; 67 break;
@@ -213,276 +69,24 @@ static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *e
213 return 0; 69 return 0;
214} 70}
215 71
216/* Sends default autocentering command compatible with 72static void hid_lg4ff_set_autocenter(struct input_dev *dev, u16 magnitude)
217 * all wheels except Formula Force EX */
218static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
219{
220 struct hid_device *hid = input_get_drvdata(dev);
221 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
222 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
223 __s32 *value = report->field[0]->value;
224
225 value[0] = 0xfe;
226 value[1] = 0x0d;
227 value[2] = magnitude >> 13;
228 value[3] = magnitude >> 13;
229 value[4] = magnitude >> 8;
230 value[5] = 0x00;
231 value[6] = 0x00;
232
233 usbhid_submit_report(hid, report, USB_DIR_OUT);
234}
235
236/* Sends autocentering command compatible with Formula Force EX */
237static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
238{ 73{
239 struct hid_device *hid = input_get_drvdata(dev); 74 struct hid_device *hid = input_get_drvdata(dev);
240 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; 75 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
241 struct hid_report *report = list_entry(report_list->next, struct hid_report, list); 76 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
242 __s32 *value = report->field[0]->value; 77 __s32 *value = report->field[0]->value;
243 magnitude = magnitude * 90 / 65535;
244
245 value[0] = 0xfe;
246 value[1] = 0x03;
247 value[2] = magnitude >> 14;
248 value[3] = magnitude >> 14;
249 value[4] = magnitude;
250 value[5] = 0x00;
251 value[6] = 0x00;
252
253 usbhid_submit_report(hid, report, USB_DIR_OUT);
254}
255
256/* Sends command to set range compatible with G25/G27/Driving Force GT */
257static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
258{
259 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
260 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
261 __s32 *value = report->field[0]->value;
262
263 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
264
265 value[0] = 0xf8;
266 value[1] = 0x81;
267 value[2] = range & 0x00ff;
268 value[3] = (range & 0xff00) >> 8;
269 value[4] = 0x00;
270 value[5] = 0x00;
271 value[6] = 0x00;
272
273 usbhid_submit_report(hid, report, USB_DIR_OUT);
274}
275
276/* Sends commands to set range compatible with Driving Force Pro wheel */
277static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
278{
279 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
280 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
281 int start_left, start_right, full_range;
282 __s32 *value = report->field[0]->value;
283
284 dbg_hid("Driving Force Pro: setting range to %u\n", range);
285
286 /* Prepare "coarse" limit command */
287 value[0] = 0xf8;
288 value[1] = 0x00; /* Set later */
289 value[2] = 0x00;
290 value[3] = 0x00;
291 value[4] = 0x00;
292 value[5] = 0x00;
293 value[6] = 0x00;
294
295 if (range > 200) {
296 report->field[0]->value[1] = 0x03;
297 full_range = 900;
298 } else {
299 report->field[0]->value[1] = 0x02;
300 full_range = 200;
301 }
302 usbhid_submit_report(hid, report, USB_DIR_OUT);
303
304 /* Prepare "fine" limit command */
305 value[0] = 0x81;
306 value[1] = 0x0b;
307 value[2] = 0x00;
308 value[3] = 0x00;
309 value[4] = 0x00;
310 value[5] = 0x00;
311 value[6] = 0x00;
312
313 if (range == 200 || range == 900) { /* Do not apply any fine limit */
314 usbhid_submit_report(hid, report, USB_DIR_OUT);
315 return;
316 }
317
318 /* Construct fine limit command */
319 start_left = (((full_range - range + 1) * 2047) / full_range);
320 start_right = 0xfff - start_left;
321
322 value[2] = start_left >> 4;
323 value[3] = start_right >> 4;
324 value[4] = 0xff;
325 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
326 value[6] = 0xff;
327
328 usbhid_submit_report(hid, report, USB_DIR_OUT);
329}
330
331static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
332{
333 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
334 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
335 __u8 i, j;
336
337 j = 0;
338 while (j < 7*cmd->cmd_num) {
339 for (i = 0; i < 7; i++)
340 report->field[0]->value[i] = cmd->cmd[j++];
341
342 usbhid_submit_report(hid, report, USB_DIR_OUT);
343 }
344}
345
346/* Read current range and display it in terminal */
347static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
348{
349 struct hid_device *hid = to_hid_device(dev);
350 struct lg4ff_device_entry *entry;
351 struct lg_drv_data *drv_data;
352 size_t count;
353
354 drv_data = hid_get_drvdata(hid);
355 if (!drv_data) {
356 hid_err(hid, "Private driver data not found!\n");
357 return 0;
358 }
359
360 entry = drv_data->device_props;
361 if (!entry) {
362 hid_err(hid, "Device properties not found!\n");
363 return 0;
364 }
365
366 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
367 return count;
368}
369
370/* Set range to user specified value, call appropriate function
371 * according to the type of the wheel */
372static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
373{
374 struct hid_device *hid = to_hid_device(dev);
375 struct lg4ff_device_entry *entry;
376 struct lg_drv_data *drv_data;
377 __u16 range = simple_strtoul(buf, NULL, 10);
378
379 drv_data = hid_get_drvdata(hid);
380 if (!drv_data) {
381 hid_err(hid, "Private driver data not found!\n");
382 return 0;
383 }
384 78
385 entry = drv_data->device_props; 79 *value++ = 0xfe;
386 if (!entry) { 80 *value++ = 0x0d;
387 hid_err(hid, "Device properties not found!\n"); 81 *value++ = 0x07;
388 return 0; 82 *value++ = 0x07;
389 } 83 *value++ = (magnitude >> 8) & 0xff;
390 84 *value++ = 0x00;
391 if (range == 0) 85 *value = 0x00;
392 range = entry->max_range;
393 86
394 /* Check if the wheel supports range setting
395 * and that the range is within limits for the wheel */
396 if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
397 entry->set_range(hid, range);
398 entry->range = range;
399 }
400
401 return count;
402}
403
404#ifdef CONFIG_LEDS_CLASS
405static void lg4ff_set_leds(struct hid_device *hid, __u8 leds)
406{
407 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
408 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
409 __s32 *value = report->field[0]->value;
410
411 value[0] = 0xf8;
412 value[1] = 0x12;
413 value[2] = leds;
414 value[3] = 0x00;
415 value[4] = 0x00;
416 value[5] = 0x00;
417 value[6] = 0x00;
418 usbhid_submit_report(hid, report, USB_DIR_OUT); 87 usbhid_submit_report(hid, report, USB_DIR_OUT);
419} 88}
420 89
421static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
422 enum led_brightness value)
423{
424 struct device *dev = led_cdev->dev->parent;
425 struct hid_device *hid = container_of(dev, struct hid_device, dev);
426 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
427 struct lg4ff_device_entry *entry;
428 int i, state = 0;
429
430 if (!drv_data) {
431 hid_err(hid, "Device data not found.");
432 return;
433 }
434
435 entry = (struct lg4ff_device_entry *)drv_data->device_props;
436
437 if (!entry) {
438 hid_err(hid, "Device properties not found.");
439 return;
440 }
441
442 for (i = 0; i < 5; i++) {
443 if (led_cdev != entry->led[i])
444 continue;
445 state = (entry->led_state >> i) & 1;
446 if (value == LED_OFF && state) {
447 entry->led_state &= ~(1 << i);
448 lg4ff_set_leds(hid, entry->led_state);
449 } else if (value != LED_OFF && !state) {
450 entry->led_state |= 1 << i;
451 lg4ff_set_leds(hid, entry->led_state);
452 }
453 break;
454 }
455}
456
457static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
458{
459 struct device *dev = led_cdev->dev->parent;
460 struct hid_device *hid = container_of(dev, struct hid_device, dev);
461 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
462 struct lg4ff_device_entry *entry;
463 int i, value = 0;
464
465 if (!drv_data) {
466 hid_err(hid, "Device data not found.");
467 return LED_OFF;
468 }
469
470 entry = (struct lg4ff_device_entry *)drv_data->device_props;
471
472 if (!entry) {
473 hid_err(hid, "Device properties not found.");
474 return LED_OFF;
475 }
476
477 for (i = 0; i < 5; i++)
478 if (led_cdev == entry->led[i]) {
479 value = (entry->led_state >> i) & 1;
480 break;
481 }
482
483 return value ? LED_FULL : LED_OFF;
484}
485#endif
486 90
487int lg4ff_init(struct hid_device *hid) 91int lg4ff_init(struct hid_device *hid)
488{ 92{
@@ -491,11 +95,9 @@ int lg4ff_init(struct hid_device *hid)
491 struct input_dev *dev = hidinput->input; 95 struct input_dev *dev = hidinput->input;
492 struct hid_report *report; 96 struct hid_report *report;
493 struct hid_field *field; 97 struct hid_field *field;
494 struct lg4ff_device_entry *entry; 98 const signed short *ff_bits = ff4_wheel_ac;
495 struct lg_drv_data *drv_data; 99 int error;
496 struct usb_device_descriptor *udesc; 100 int i;
497 int error, i, j;
498 __u16 bcdDevice, rev_maj, rev_min;
499 101
500 /* Find the report to use */ 102 /* Find the report to use */
501 if (list_empty(report_list)) { 103 if (list_empty(report_list)) {
@@ -516,201 +118,18 @@ int lg4ff_init(struct hid_device *hid)
516 return -1; 118 return -1;
517 } 119 }
518 120
519 /* Check what wheel has been connected */ 121 for (i = 0; ff_bits[i] >= 0; i++)
520 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) { 122 set_bit(ff_bits[i], dev->ffbit);
521 if (hid->product == lg4ff_devices[i].product_id) {
522 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
523 break;
524 }
525 }
526
527 if (i == ARRAY_SIZE(lg4ff_devices)) {
528 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
529 "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
530 return -1;
531 }
532
533 /* Attempt to switch wheel to native mode when applicable */
534 udesc = &(hid_to_usb_dev(hid)->descriptor);
535 if (!udesc) {
536 hid_err(hid, "NULL USB device descriptor\n");
537 return -1;
538 }
539 bcdDevice = le16_to_cpu(udesc->bcdDevice);
540 rev_maj = bcdDevice >> 8;
541 rev_min = bcdDevice & 0xff;
542
543 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
544 dbg_hid("Generic wheel detected, can it do native?\n");
545 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
546
547 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
548 if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
549 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
550 hid_info(hid, "Switched to native mode\n");
551 }
552 }
553 }
554
555 /* Set supported force feedback capabilities */
556 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
557 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
558 123
559 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play); 124 error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
560 125
561 if (error) 126 if (error)
562 return error; 127 return error;
563 128
564 /* Check if autocentering is available and 129 if (test_bit(FF_AUTOCENTER, dev->ffbit))
565 * set the centering force to zero by default */ 130 dev->ff->set_autocenter = hid_lg4ff_set_autocenter;
566 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
567 if (rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN) /* Formula Force EX expects different autocentering command */
568 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
569 else
570 dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
571
572 dev->ff->set_autocenter(dev, 0);
573 }
574
575 /* Get private driver data */
576 drv_data = hid_get_drvdata(hid);
577 if (!drv_data) {
578 hid_err(hid, "Cannot add device, private driver data not allocated\n");
579 return -1;
580 }
581
582 /* Initialize device properties */
583 entry = kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
584 if (!entry) {
585 hid_err(hid, "Cannot add device, insufficient memory to allocate device properties.\n");
586 return -ENOMEM;
587 }
588 drv_data->device_props = entry;
589
590 entry->product_id = lg4ff_devices[i].product_id;
591 entry->min_range = lg4ff_devices[i].min_range;
592 entry->max_range = lg4ff_devices[i].max_range;
593 entry->set_range = lg4ff_devices[i].set_range;
594
595 /* Create sysfs interface */
596 error = device_create_file(&hid->dev, &dev_attr_range);
597 if (error)
598 return error;
599 dbg_hid("sysfs interface created\n");
600
601 /* Set default axes parameters */
602 switch (lg4ff_devices[i].product_id) {
603 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
604 dbg_hid("Setting axes parameters for Driving Force Pro\n");
605 input_set_abs_params(dev, ABS_X, DFP_X_MIN, DFP_X_MAX, 0, 0);
606 input_set_abs_params(dev, ABS_Y, DFP_PEDAL_MIN, DFP_PEDAL_MAX, 0, 0);
607 input_set_abs_params(dev, ABS_RZ, DFP_PEDAL_MIN, DFP_PEDAL_MAX, 0, 0);
608 break;
609 default:
610 break;
611 }
612
613 /* Set the maximum range to start with */
614 entry->range = entry->max_range;
615 if (entry->set_range != NULL)
616 entry->set_range(hid, entry->range);
617
618#ifdef CONFIG_LEDS_CLASS
619 /* register led subsystem - G27 only */
620 entry->led_state = 0;
621 for (j = 0; j < 5; j++)
622 entry->led[j] = NULL;
623
624 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
625 struct led_classdev *led;
626 size_t name_sz;
627 char *name;
628 131
629 lg4ff_set_leds(hid, 0); 132 hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
630
631 name_sz = strlen(dev_name(&hid->dev)) + 8;
632
633 for (j = 0; j < 5; j++) {
634 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
635 if (!led) {
636 hid_err(hid, "can't allocate memory for LED %d\n", j);
637 goto err;
638 }
639
640 name = (void *)(&led[1]);
641 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
642 led->name = name;
643 led->brightness = 0;
644 led->max_brightness = 1;
645 led->brightness_get = lg4ff_led_get_brightness;
646 led->brightness_set = lg4ff_led_set_brightness;
647
648 entry->led[j] = led;
649 error = led_classdev_register(&hid->dev, led);
650
651 if (error) {
652 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
653err:
654 /* Deregister LEDs (if any) */
655 for (j = 0; j < 5; j++) {
656 led = entry->led[j];
657 entry->led[j] = NULL;
658 if (!led)
659 continue;
660 led_classdev_unregister(led);
661 kfree(led);
662 }
663 goto out; /* Let the driver continue without LEDs */
664 }
665 }
666 }
667out:
668#endif
669 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
670 return 0; 133 return 0;
671} 134}
672 135
673
674
675int lg4ff_deinit(struct hid_device *hid)
676{
677 struct lg4ff_device_entry *entry;
678 struct lg_drv_data *drv_data;
679
680 device_remove_file(&hid->dev, &dev_attr_range);
681
682 drv_data = hid_get_drvdata(hid);
683 if (!drv_data) {
684 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
685 return -1;
686 }
687 entry = drv_data->device_props;
688 if (!entry) {
689 hid_err(hid, "Error while deinitializing device, no device properties data.\n");
690 return -1;
691 }
692
693#ifdef CONFIG_LEDS_CLASS
694 {
695 int j;
696 struct led_classdev *led;
697
698 /* Deregister LEDs (if any) */
699 for (j = 0; j < 5; j++) {
700
701 led = entry->led[j];
702 entry->led[j] = NULL;
703 if (!led)
704 continue;
705 led_classdev_unregister(led);
706 kfree(led);
707 }
708 }
709#endif
710
711 /* Deallocate memory */
712 kfree(entry);
713
714 dbg_hid("Device successfully unregistered\n");
715 return 0;
716}
generated by cgit v1.2.2 (git 2.25.0) at 2025-09-04 01:22:21 -0400