2 * Force feedback support for Logitech Gaming Wheels
4 * Including G27, G25, DFP, DFGT, FFEX, Momo, Momo2 &
5 * Speed Force Wireless (WiiWheel)
7 * Copyright (c) 2010 Simon Wood <simon@mungewell.org>
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
27 #include <linux/input.h>
28 #include <linux/usb.h>
29 #include <linux/hid.h>
31 #include "usbhid/usbhid.h"
33 #include "hid-lg4ff.h"
36 #define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
38 #define LG4FF_MMODE_IS_MULTIMODE 0
39 #define LG4FF_MMODE_SWITCHED 1
40 #define LG4FF_MMODE_NOT_MULTIMODE 2
42 #define LG4FF_MODE_NATIVE_IDX 0
43 #define LG4FF_MODE_DFEX_IDX 1
44 #define LG4FF_MODE_DFP_IDX 2
45 #define LG4FF_MODE_G25_IDX 3
46 #define LG4FF_MODE_DFGT_IDX 4
47 #define LG4FF_MODE_G27_IDX 5
48 #define LG4FF_MODE_MAX_IDX 6
50 #define LG4FF_MODE_NATIVE BIT(LG4FF_MODE_NATIVE_IDX)
51 #define LG4FF_MODE_DFEX BIT(LG4FF_MODE_DFEX_IDX)
52 #define LG4FF_MODE_DFP BIT(LG4FF_MODE_DFP_IDX)
53 #define LG4FF_MODE_G25 BIT(LG4FF_MODE_G25_IDX)
54 #define LG4FF_MODE_DFGT BIT(LG4FF_MODE_DFGT_IDX)
55 #define LG4FF_MODE_G27 BIT(LG4FF_MODE_G27_IDX)
57 #define LG4FF_DFEX_TAG "DF-EX"
58 #define LG4FF_DFEX_NAME "Driving Force / Formula EX"
59 #define LG4FF_DFP_TAG "DFP"
60 #define LG4FF_DFP_NAME "Driving Force Pro"
61 #define LG4FF_G25_TAG "G25"
62 #define LG4FF_G25_NAME "G25 Racing Wheel"
63 #define LG4FF_G27_TAG "G27"
64 #define LG4FF_G27_NAME "G27 Racing Wheel"
65 #define LG4FF_DFGT_TAG "DFGT"
66 #define LG4FF_DFGT_NAME "Driving Force GT"
68 #define LG4FF_FFEX_REV_MAJ 0x21
69 #define LG4FF_FFEX_REV_MIN 0x00
71 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
72 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range);
74 struct lg4ff_wheel_data {
79 #ifdef CONFIG_LEDS_CLASS
81 struct led_classdev *led[5];
83 const u32 alternate_modes;
84 const char * const real_tag;
85 const char * const real_name;
86 const u16 real_product_id;
88 void (*set_range)(struct hid_device *hid, u16 range);
91 struct lg4ff_device_entry {
92 spinlock_t report_lock; /* Protect output HID report */
93 struct hid_report *report;
94 struct lg4ff_wheel_data wdata;
97 static const signed short lg4ff_wheel_effects[] = {
104 const u32 product_id;
105 const signed short *ff_effects;
108 void (*set_range)(struct hid_device *hid, u16 range);
111 struct lg4ff_compat_mode_switch {
112 const u8 cmd_count; /* Number of commands to send */
116 struct lg4ff_wheel_ident_info {
120 const u16 real_product_id;
123 struct lg4ff_multimode_wheel {
124 const u16 product_id;
125 const u32 alternate_modes;
126 const char *real_tag;
127 const char *real_name;
130 struct lg4ff_alternate_mode {
131 const u16 product_id;
136 static const struct lg4ff_wheel lg4ff_devices[] = {
137 {USB_DEVICE_ID_LOGITECH_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
138 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL, lg4ff_wheel_effects, 40, 270, NULL},
139 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_dfp},
140 {USB_DEVICE_ID_LOGITECH_G25_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
141 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
142 {USB_DEVICE_ID_LOGITECH_G27_WHEEL, lg4ff_wheel_effects, 40, 900, lg4ff_set_range_g25},
143 {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
144 {USB_DEVICE_ID_LOGITECH_WII_WHEEL, lg4ff_wheel_effects, 40, 270, NULL}
147 static const struct lg4ff_multimode_wheel lg4ff_multimode_wheels[] = {
148 {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,
149 LG4FF_MODE_NATIVE | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
150 LG4FF_DFP_TAG, LG4FF_DFP_NAME},
151 {USB_DEVICE_ID_LOGITECH_G25_WHEEL,
152 LG4FF_MODE_NATIVE | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
153 LG4FF_G25_TAG, LG4FF_G25_NAME},
154 {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,
155 LG4FF_MODE_NATIVE | LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
156 LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
157 {USB_DEVICE_ID_LOGITECH_G27_WHEEL,
158 LG4FF_MODE_NATIVE | LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
159 LG4FF_G27_TAG, LG4FF_G27_NAME},
162 static const struct lg4ff_alternate_mode lg4ff_alternate_modes[] = {
163 [LG4FF_MODE_NATIVE_IDX] = {0, "native", ""},
164 [LG4FF_MODE_DFEX_IDX] = {USB_DEVICE_ID_LOGITECH_WHEEL, LG4FF_DFEX_TAG, LG4FF_DFEX_NAME},
165 [LG4FF_MODE_DFP_IDX] = {USB_DEVICE_ID_LOGITECH_DFP_WHEEL, LG4FF_DFP_TAG, LG4FF_DFP_NAME},
166 [LG4FF_MODE_G25_IDX] = {USB_DEVICE_ID_LOGITECH_G25_WHEEL, LG4FF_G25_TAG, LG4FF_G25_NAME},
167 [LG4FF_MODE_DFGT_IDX] = {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL, LG4FF_DFGT_TAG, LG4FF_DFGT_NAME},
168 [LG4FF_MODE_G27_IDX] = {USB_DEVICE_ID_LOGITECH_G27_WHEEL, LG4FF_G27_TAG, LG4FF_G27_NAME}
171 /* Multimode wheel identificators */
172 static const struct lg4ff_wheel_ident_info lg4ff_dfp_ident_info = {
173 LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
176 USB_DEVICE_ID_LOGITECH_DFP_WHEEL
179 static const struct lg4ff_wheel_ident_info lg4ff_g25_ident_info = {
180 LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
183 USB_DEVICE_ID_LOGITECH_G25_WHEEL
186 static const struct lg4ff_wheel_ident_info lg4ff_g27_ident_info = {
187 LG4FF_MODE_G27 | LG4FF_MODE_G25 | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
190 USB_DEVICE_ID_LOGITECH_G27_WHEEL
193 static const struct lg4ff_wheel_ident_info lg4ff_dfgt_ident_info = {
194 LG4FF_MODE_DFGT | LG4FF_MODE_DFP | LG4FF_MODE_DFEX,
197 USB_DEVICE_ID_LOGITECH_DFGT_WHEEL
200 /* Multimode wheel identification checklists */
201 static const struct lg4ff_wheel_ident_info *lg4ff_main_checklist[] = {
202 &lg4ff_dfgt_ident_info,
203 &lg4ff_g27_ident_info,
204 &lg4ff_g25_ident_info,
205 &lg4ff_dfp_ident_info
208 /* Compatibility mode switching commands */
209 /* EXT_CMD9 - Understood by G27 and DFGT */
210 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfex = {
212 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
213 0xf8, 0x09, 0x00, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DF-EX with detach */
216 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfp = {
218 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
219 0xf8, 0x09, 0x01, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFP with detach */
222 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g25 = {
224 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
225 0xf8, 0x09, 0x02, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G25 with detach */
228 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_dfgt = {
230 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
231 0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00} /* Switch mode to DFGT with detach */
234 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext09_g27 = {
236 {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, /* Revert mode upon USB reset */
237 0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00} /* Switch mode to G27 with detach */
240 /* EXT_CMD1 - Understood by DFP, G25, G27 and DFGT */
241 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext01_dfp = {
243 {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
246 /* EXT_CMD16 - Understood by G25 and G27 */
247 static const struct lg4ff_compat_mode_switch lg4ff_mode_switch_ext16_g25 = {
249 {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
252 /* Recalculates X axis value accordingly to currently selected range */
253 static s32 lg4ff_adjust_dfp_x_axis(s32 value, u16 range)
260 else if (range == 200)
262 else if (range < 200)
267 new_value = 8192 + mult_frac(value - 8192, max_range, range);
270 else if (new_value > 16383)
276 int lg4ff_adjust_input_event(struct hid_device *hid, struct hid_field *field,
277 struct hid_usage *usage, s32 value, struct lg_drv_data *drv_data)
279 struct lg4ff_device_entry *entry = drv_data->device_props;
283 hid_err(hid, "Device properties not found");
287 switch (entry->wdata.product_id) {
288 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
289 switch (usage->code) {
291 new_value = lg4ff_adjust_dfp_x_axis(value, entry->wdata.range);
292 input_event(field->hidinput->input, usage->type, usage->code, new_value);
302 static void lg4ff_init_wheel_data(struct lg4ff_wheel_data * const wdata, const struct lg4ff_wheel *wheel,
303 const struct lg4ff_multimode_wheel *mmode_wheel,
304 const u16 real_product_id)
306 u32 alternate_modes = 0;
307 const char *real_tag = NULL;
308 const char *real_name = NULL;
311 alternate_modes = mmode_wheel->alternate_modes;
312 real_tag = mmode_wheel->real_tag;
313 real_name = mmode_wheel->real_name;
317 struct lg4ff_wheel_data t_wdata = { .product_id = wheel->product_id,
318 .real_product_id = real_product_id,
319 .min_range = wheel->min_range,
320 .max_range = wheel->max_range,
321 .set_range = wheel->set_range,
322 .alternate_modes = alternate_modes,
323 .real_tag = real_tag,
324 .real_name = real_name };
326 memcpy(wdata, &t_wdata, sizeof(t_wdata));
330 static int lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
332 struct hid_device *hid = input_get_drvdata(dev);
333 struct lg4ff_device_entry *entry;
334 struct lg_drv_data *drv_data;
339 drv_data = hid_get_drvdata(hid);
341 hid_err(hid, "Private driver data not found!\n");
345 entry = drv_data->device_props;
347 hid_err(hid, "Device properties not found!\n");
350 value = entry->report->field[0]->value;
352 #define CLAMP(x) do { if (x < 0) x = 0; else if (x > 0xff) x = 0xff; } while (0)
354 switch (effect->type) {
356 x = effect->u.ramp.start_level + 0x80; /* 0x80 is no force */
359 spin_lock_irqsave(&entry->report_lock, flags);
361 /* De-activate force in slot-1*/
370 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
371 spin_unlock_irqrestore(&entry->report_lock, flags);
375 value[0] = 0x11; /* Slot 1 */
383 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
384 spin_unlock_irqrestore(&entry->report_lock, flags);
390 /* Sends default autocentering command compatible with
391 * all wheels except Formula Force EX */
392 static void lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
394 struct hid_device *hid = input_get_drvdata(dev);
395 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
396 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
397 s32 *value = report->field[0]->value;
398 u32 expand_a, expand_b;
399 struct lg4ff_device_entry *entry;
400 struct lg_drv_data *drv_data;
403 drv_data = hid_get_drvdata(hid);
405 hid_err(hid, "Private driver data not found!\n");
409 entry = drv_data->device_props;
411 hid_err(hid, "Device properties not found!\n");
414 value = entry->report->field[0]->value;
416 /* De-activate Auto-Center */
417 spin_lock_irqsave(&entry->report_lock, flags);
418 if (magnitude == 0) {
427 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
428 spin_unlock_irqrestore(&entry->report_lock, flags);
432 if (magnitude <= 0xaaaa) {
433 expand_a = 0x0c * magnitude;
434 expand_b = 0x80 * magnitude;
436 expand_a = (0x0c * 0xaaaa) + 0x06 * (magnitude - 0xaaaa);
437 expand_b = (0x80 * 0xaaaa) + 0xff * (magnitude - 0xaaaa);
440 /* Adjust for non-MOMO wheels */
441 switch (entry->wdata.product_id) {
442 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL:
443 case USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2:
446 expand_a = expand_a >> 1;
452 value[2] = expand_a / 0xaaaa;
453 value[3] = expand_a / 0xaaaa;
454 value[4] = expand_b / 0xaaaa;
458 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
460 /* Activate Auto-Center */
469 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
470 spin_unlock_irqrestore(&entry->report_lock, flags);
473 /* Sends autocentering command compatible with Formula Force EX */
474 static void lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
476 struct hid_device *hid = input_get_drvdata(dev);
477 struct lg4ff_device_entry *entry;
478 struct lg_drv_data *drv_data;
481 magnitude = magnitude * 90 / 65535;
483 drv_data = hid_get_drvdata(hid);
485 hid_err(hid, "Private driver data not found!\n");
489 entry = drv_data->device_props;
491 hid_err(hid, "Device properties not found!\n");
494 value = entry->report->field[0]->value;
496 spin_lock_irqsave(&entry->report_lock, flags);
499 value[2] = magnitude >> 14;
500 value[3] = magnitude >> 14;
501 value[4] = magnitude;
505 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
506 spin_unlock_irqrestore(&entry->report_lock, flags);
509 /* Sends command to set range compatible with G25/G27/Driving Force GT */
510 static void lg4ff_set_range_g25(struct hid_device *hid, u16 range)
512 struct lg4ff_device_entry *entry;
513 struct lg_drv_data *drv_data;
517 drv_data = hid_get_drvdata(hid);
519 hid_err(hid, "Private driver data not found!\n");
523 entry = drv_data->device_props;
525 hid_err(hid, "Device properties not found!\n");
528 value = entry->report->field[0]->value;
529 dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
531 spin_lock_irqsave(&entry->report_lock, flags);
534 value[2] = range & 0x00ff;
535 value[3] = (range & 0xff00) >> 8;
540 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
541 spin_unlock_irqrestore(&entry->report_lock, flags);
544 /* Sends commands to set range compatible with Driving Force Pro wheel */
545 static void lg4ff_set_range_dfp(struct hid_device *hid, u16 range)
547 struct lg4ff_device_entry *entry;
548 struct lg_drv_data *drv_data;
550 int start_left, start_right, full_range;
553 drv_data = hid_get_drvdata(hid);
555 hid_err(hid, "Private driver data not found!\n");
559 entry = drv_data->device_props;
561 hid_err(hid, "Device properties not found!\n");
564 value = entry->report->field[0]->value;
565 dbg_hid("Driving Force Pro: setting range to %u\n", range);
567 /* Prepare "coarse" limit command */
568 spin_lock_irqsave(&entry->report_lock, flags);
570 value[1] = 0x00; /* Set later */
584 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
586 /* Prepare "fine" limit command */
595 if (range == 200 || range == 900) { /* Do not apply any fine limit */
596 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
597 spin_unlock_irqrestore(&entry->report_lock, flags);
601 /* Construct fine limit command */
602 start_left = (((full_range - range + 1) * 2047) / full_range);
603 start_right = 0xfff - start_left;
605 value[2] = start_left >> 4;
606 value[3] = start_right >> 4;
608 value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
611 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
612 spin_unlock_irqrestore(&entry->report_lock, flags);
615 static const struct lg4ff_compat_mode_switch *lg4ff_get_mode_switch_command(const u16 real_product_id, const u16 target_product_id)
617 switch (real_product_id) {
618 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
619 switch (target_product_id) {
620 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
621 return &lg4ff_mode_switch_ext01_dfp;
622 /* DFP can only be switched to its native mode */
627 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
628 switch (target_product_id) {
629 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
630 return &lg4ff_mode_switch_ext01_dfp;
631 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
632 return &lg4ff_mode_switch_ext16_g25;
633 /* G25 can only be switched to DFP mode or its native mode */
638 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
639 switch (target_product_id) {
640 case USB_DEVICE_ID_LOGITECH_WHEEL:
641 return &lg4ff_mode_switch_ext09_dfex;
642 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
643 return &lg4ff_mode_switch_ext09_dfp;
644 case USB_DEVICE_ID_LOGITECH_G25_WHEEL:
645 return &lg4ff_mode_switch_ext09_g25;
646 case USB_DEVICE_ID_LOGITECH_G27_WHEEL:
647 return &lg4ff_mode_switch_ext09_g27;
648 /* G27 can only be switched to DF-EX, DFP, G25 or its native mode */
653 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
654 switch (target_product_id) {
655 case USB_DEVICE_ID_LOGITECH_WHEEL:
656 return &lg4ff_mode_switch_ext09_dfex;
657 case USB_DEVICE_ID_LOGITECH_DFP_WHEEL:
658 return &lg4ff_mode_switch_ext09_dfp;
659 case USB_DEVICE_ID_LOGITECH_DFGT_WHEEL:
660 return &lg4ff_mode_switch_ext09_dfgt;
661 /* DFGT can only be switched to DF-EX, DFP or its native mode */
666 /* No other wheels have multiple modes */
672 static int lg4ff_switch_compatibility_mode(struct hid_device *hid, const struct lg4ff_compat_mode_switch *s)
674 struct lg4ff_device_entry *entry;
675 struct lg_drv_data *drv_data;
680 drv_data = hid_get_drvdata(hid);
682 hid_err(hid, "Private driver data not found!\n");
686 entry = drv_data->device_props;
688 hid_err(hid, "Device properties not found!\n");
691 value = entry->report->field[0]->value;
693 spin_lock_irqsave(&entry->report_lock, flags);
694 for (i = 0; i < s->cmd_count; i++) {
697 for (j = 0; j < 7; j++)
698 value[j] = s->cmd[j + (7*i)];
700 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
702 spin_unlock_irqrestore(&entry->report_lock, flags);
707 static ssize_t lg4ff_alternate_modes_show(struct device *dev, struct device_attribute *attr, char *buf)
709 struct hid_device *hid = to_hid_device(dev);
710 struct lg4ff_device_entry *entry;
711 struct lg_drv_data *drv_data;
715 drv_data = hid_get_drvdata(hid);
717 hid_err(hid, "Private driver data not found!\n");
721 entry = drv_data->device_props;
723 hid_err(hid, "Device properties not found!\n");
727 if (!entry->wdata.real_name) {
728 hid_err(hid, "NULL pointer to string\n");
732 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
733 if (entry->wdata.alternate_modes & BIT(i)) {
734 /* Print tag and full name */
735 count += scnprintf(buf + count, PAGE_SIZE - count, "%s: %s",
736 lg4ff_alternate_modes[i].tag,
737 !lg4ff_alternate_modes[i].product_id ? entry->wdata.real_name : lg4ff_alternate_modes[i].name);
738 if (count >= PAGE_SIZE - 1)
741 /* Mark the currently active mode with an asterisk */
742 if (lg4ff_alternate_modes[i].product_id == entry->wdata.product_id ||
743 (lg4ff_alternate_modes[i].product_id == 0 && entry->wdata.product_id == entry->wdata.real_product_id))
744 count += scnprintf(buf + count, PAGE_SIZE - count, " *\n");
746 count += scnprintf(buf + count, PAGE_SIZE - count, "\n");
748 if (count >= PAGE_SIZE - 1)
756 static ssize_t lg4ff_alternate_modes_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
758 struct hid_device *hid = to_hid_device(dev);
759 struct lg4ff_device_entry *entry;
760 struct lg_drv_data *drv_data;
761 const struct lg4ff_compat_mode_switch *s;
762 u16 target_product_id = 0;
766 drv_data = hid_get_drvdata(hid);
768 hid_err(hid, "Private driver data not found!\n");
772 entry = drv_data->device_props;
774 hid_err(hid, "Device properties not found!\n");
778 /* Allow \n at the end of the input parameter */
779 lbuf = kasprintf(GFP_KERNEL, "%s", buf);
784 if (lbuf[i-1] == '\n') {
792 for (i = 0; i < LG4FF_MODE_MAX_IDX; i++) {
793 const u16 mode_product_id = lg4ff_alternate_modes[i].product_id;
794 const char *tag = lg4ff_alternate_modes[i].tag;
796 if (entry->wdata.alternate_modes & BIT(i)) {
797 if (!strcmp(tag, lbuf)) {
798 if (!mode_product_id)
799 target_product_id = entry->wdata.real_product_id;
801 target_product_id = mode_product_id;
807 if (i == LG4FF_MODE_MAX_IDX) {
808 hid_info(hid, "Requested mode \"%s\" is not supported by the device\n", lbuf);
812 kfree(lbuf); /* Not needed anymore */
814 if (target_product_id == entry->wdata.product_id) /* Nothing to do */
817 /* Automatic switching has to be disabled for the switch to DF-EX mode to work correctly */
818 if (target_product_id == USB_DEVICE_ID_LOGITECH_WHEEL && !lg4ff_no_autoswitch) {
819 hid_info(hid, "\"%s\" cannot be switched to \"DF-EX\" mode. Load the \"hid_logitech\" module with \"lg4ff_no_autoswitch=1\" parameter set and try again\n",
820 entry->wdata.real_name);
824 /* Take care of hardware limitations */
825 if ((entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_DFP_WHEEL || entry->wdata.real_product_id == USB_DEVICE_ID_LOGITECH_G25_WHEEL) &&
826 entry->wdata.product_id > target_product_id) {
827 hid_info(hid, "\"%s\" cannot be switched back into \"%s\" mode\n", entry->wdata.real_name, lg4ff_alternate_modes[i].name);
831 s = lg4ff_get_mode_switch_command(entry->wdata.real_product_id, target_product_id);
833 hid_err(hid, "Invalid target product ID %X\n", target_product_id);
837 ret = lg4ff_switch_compatibility_mode(hid, s);
838 return (ret == 0 ? count : ret);
840 static DEVICE_ATTR(alternate_modes, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_alternate_modes_show, lg4ff_alternate_modes_store);
842 /* Export the currently set range of the wheel */
843 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr,
846 struct hid_device *hid = to_hid_device(dev);
847 struct lg4ff_device_entry *entry;
848 struct lg_drv_data *drv_data;
851 drv_data = hid_get_drvdata(hid);
853 hid_err(hid, "Private driver data not found!\n");
857 entry = drv_data->device_props;
859 hid_err(hid, "Device properties not found!\n");
863 count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->wdata.range);
867 /* Set range to user specified value, call appropriate function
868 * according to the type of the wheel */
869 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr,
870 const char *buf, size_t count)
872 struct hid_device *hid = to_hid_device(dev);
873 struct lg4ff_device_entry *entry;
874 struct lg_drv_data *drv_data;
875 u16 range = simple_strtoul(buf, NULL, 10);
877 drv_data = hid_get_drvdata(hid);
879 hid_err(hid, "Private driver data not found!\n");
883 entry = drv_data->device_props;
885 hid_err(hid, "Device properties not found!\n");
890 range = entry->wdata.max_range;
892 /* Check if the wheel supports range setting
893 * and that the range is within limits for the wheel */
894 if (entry->wdata.set_range && range >= entry->wdata.min_range && range <= entry->wdata.max_range) {
895 entry->wdata.set_range(hid, range);
896 entry->wdata.range = range;
901 static DEVICE_ATTR(range, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH, lg4ff_range_show, lg4ff_range_store);
903 static ssize_t lg4ff_real_id_show(struct device *dev, struct device_attribute *attr, char *buf)
905 struct hid_device *hid = to_hid_device(dev);
906 struct lg4ff_device_entry *entry;
907 struct lg_drv_data *drv_data;
910 drv_data = hid_get_drvdata(hid);
912 hid_err(hid, "Private driver data not found!\n");
916 entry = drv_data->device_props;
918 hid_err(hid, "Device properties not found!\n");
922 if (!entry->wdata.real_tag || !entry->wdata.real_name) {
923 hid_err(hid, "NULL pointer to string\n");
927 count = scnprintf(buf, PAGE_SIZE, "%s: %s\n", entry->wdata.real_tag, entry->wdata.real_name);
931 static ssize_t lg4ff_real_id_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
933 /* Real ID is a read-only value */
936 static DEVICE_ATTR(real_id, S_IRUGO, lg4ff_real_id_show, lg4ff_real_id_store);
938 #ifdef CONFIG_LEDS_CLASS
939 static void lg4ff_set_leds(struct hid_device *hid, u8 leds)
941 struct lg_drv_data *drv_data;
942 struct lg4ff_device_entry *entry;
946 drv_data = hid_get_drvdata(hid);
948 hid_err(hid, "Private driver data not found!\n");
952 entry = drv_data->device_props;
954 hid_err(hid, "Device properties not found!\n");
957 value = entry->report->field[0]->value;
959 spin_lock_irqsave(&entry->report_lock, flags);
967 hid_hw_request(hid, entry->report, HID_REQ_SET_REPORT);
968 spin_unlock_irqrestore(&entry->report_lock, flags);
971 static void lg4ff_led_set_brightness(struct led_classdev *led_cdev,
972 enum led_brightness value)
974 struct device *dev = led_cdev->dev->parent;
975 struct hid_device *hid = container_of(dev, struct hid_device, dev);
976 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
977 struct lg4ff_device_entry *entry;
981 hid_err(hid, "Device data not found.");
985 entry = drv_data->device_props;
988 hid_err(hid, "Device properties not found.");
992 for (i = 0; i < 5; i++) {
993 if (led_cdev != entry->wdata.led[i])
995 state = (entry->wdata.led_state >> i) & 1;
996 if (value == LED_OFF && state) {
997 entry->wdata.led_state &= ~(1 << i);
998 lg4ff_set_leds(hid, entry->wdata.led_state);
999 } else if (value != LED_OFF && !state) {
1000 entry->wdata.led_state |= 1 << i;
1001 lg4ff_set_leds(hid, entry->wdata.led_state);
1007 static enum led_brightness lg4ff_led_get_brightness(struct led_classdev *led_cdev)
1009 struct device *dev = led_cdev->dev->parent;
1010 struct hid_device *hid = container_of(dev, struct hid_device, dev);
1011 struct lg_drv_data *drv_data = hid_get_drvdata(hid);
1012 struct lg4ff_device_entry *entry;
1016 hid_err(hid, "Device data not found.");
1020 entry = drv_data->device_props;
1023 hid_err(hid, "Device properties not found.");
1027 for (i = 0; i < 5; i++)
1028 if (led_cdev == entry->wdata.led[i]) {
1029 value = (entry->wdata.led_state >> i) & 1;
1033 return value ? LED_FULL : LED_OFF;
1037 static u16 lg4ff_identify_multimode_wheel(struct hid_device *hid, const u16 reported_product_id, const u16 bcdDevice)
1042 /* identify current mode from USB PID */
1043 for (i = 1; i < ARRAY_SIZE(lg4ff_alternate_modes); i++) {
1044 dbg_hid("Testing whether PID is %X\n", lg4ff_alternate_modes[i].product_id);
1045 if (reported_product_id == lg4ff_alternate_modes[i].product_id)
1049 if (i == ARRAY_SIZE(lg4ff_alternate_modes))
1052 current_mode = BIT(i);
1054 for (i = 0; i < ARRAY_SIZE(lg4ff_main_checklist); i++) {
1055 const u16 mask = lg4ff_main_checklist[i]->mask;
1056 const u16 result = lg4ff_main_checklist[i]->result;
1057 const u16 real_product_id = lg4ff_main_checklist[i]->real_product_id;
1059 if ((current_mode & lg4ff_main_checklist[i]->modes) && \
1060 (bcdDevice & mask) == result) {
1061 dbg_hid("Found wheel with real PID %X whose reported PID is %X\n", real_product_id, reported_product_id);
1062 return real_product_id;
1066 /* No match found. This is either Driving Force or an unknown
1067 * wheel model, do not touch it */
1068 dbg_hid("Wheel with bcdDevice %X was not recognized as multimode wheel, leaving in its current mode\n", bcdDevice);
1072 static int lg4ff_handle_multimode_wheel(struct hid_device *hid, u16 *real_product_id, const u16 bcdDevice)
1074 const u16 reported_product_id = hid->product;
1077 *real_product_id = lg4ff_identify_multimode_wheel(hid, reported_product_id, bcdDevice);
1078 /* Probed wheel is not a multimode wheel */
1079 if (!*real_product_id) {
1080 *real_product_id = reported_product_id;
1081 dbg_hid("Wheel is not a multimode wheel\n");
1082 return LG4FF_MMODE_NOT_MULTIMODE;
1085 /* Switch from "Driving Force" mode to native mode automatically.
1086 * Otherwise keep the wheel in its current mode */
1087 if (reported_product_id == USB_DEVICE_ID_LOGITECH_WHEEL &&
1088 reported_product_id != *real_product_id &&
1089 !lg4ff_no_autoswitch) {
1090 const struct lg4ff_compat_mode_switch *s = lg4ff_get_mode_switch_command(*real_product_id, *real_product_id);
1093 hid_err(hid, "Invalid product id %X\n", *real_product_id);
1094 return LG4FF_MMODE_NOT_MULTIMODE;
1097 ret = lg4ff_switch_compatibility_mode(hid, s);
1099 /* Wheel could not have been switched to native mode,
1100 * leave it in "Driving Force" mode and continue */
1101 hid_err(hid, "Unable to switch wheel mode, errno %d\n", ret);
1102 return LG4FF_MMODE_IS_MULTIMODE;
1104 return LG4FF_MMODE_SWITCHED;
1107 return LG4FF_MMODE_IS_MULTIMODE;
1111 int lg4ff_init(struct hid_device *hid)
1113 struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
1114 struct input_dev *dev = hidinput->input;
1115 struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
1116 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
1117 const struct usb_device_descriptor *udesc = &(hid_to_usb_dev(hid)->descriptor);
1118 const u16 bcdDevice = le16_to_cpu(udesc->bcdDevice);
1119 const struct lg4ff_multimode_wheel *mmode_wheel = NULL;
1120 struct lg4ff_device_entry *entry;
1121 struct lg_drv_data *drv_data;
1123 int mmode_ret, mmode_idx = -1;
1124 u16 real_product_id;
1126 /* Check that the report looks ok */
1127 if (!hid_validate_values(hid, HID_OUTPUT_REPORT, 0, 0, 7))
1130 drv_data = hid_get_drvdata(hid);
1132 hid_err(hid, "Cannot add device, private driver data not allocated\n");
1135 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
1138 spin_lock_init(&entry->report_lock);
1139 entry->report = report;
1140 drv_data->device_props = entry;
1142 /* Check if a multimode wheel has been connected and
1143 * handle it appropriately */
1144 mmode_ret = lg4ff_handle_multimode_wheel(hid, &real_product_id, bcdDevice);
1146 /* Wheel has been told to switch to native mode. There is no point in going on
1147 * with the initialization as the wheel will do a USB reset when it switches mode
1149 if (mmode_ret == LG4FF_MMODE_SWITCHED)
1151 else if (mmode_ret < 0) {
1152 hid_err(hid, "Unable to switch device mode during initialization, errno %d\n", mmode_ret);
1157 /* Check what wheel has been connected */
1158 for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
1159 if (hid->product == lg4ff_devices[i].product_id) {
1160 dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
1165 if (i == ARRAY_SIZE(lg4ff_devices)) {
1166 hid_err(hid, "This device is flagged to be handled by the lg4ff module but this module does not know how to handle it. "
1167 "Please report this as a bug to LKML, Simon Wood <simon@mungewell.org> or "
1168 "Michal Maly <madcatxster@devoid-pointer.net>\n");
1173 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1174 for (mmode_idx = 0; mmode_idx < ARRAY_SIZE(lg4ff_multimode_wheels); mmode_idx++) {
1175 if (real_product_id == lg4ff_multimode_wheels[mmode_idx].product_id)
1179 if (mmode_idx == ARRAY_SIZE(lg4ff_multimode_wheels)) {
1180 hid_err(hid, "Device product ID %X is not listed as a multimode wheel", real_product_id);
1186 /* Set supported force feedback capabilities */
1187 for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
1188 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
1190 error = input_ff_create_memless(dev, NULL, lg4ff_play);
1195 /* Initialize device properties */
1196 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1197 BUG_ON(mmode_idx == -1);
1198 mmode_wheel = &lg4ff_multimode_wheels[mmode_idx];
1200 lg4ff_init_wheel_data(&entry->wdata, &lg4ff_devices[i], mmode_wheel, real_product_id);
1202 /* Check if autocentering is available and
1203 * set the centering force to zero by default */
1204 if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
1205 /* Formula Force EX expects different autocentering command */
1206 if ((bcdDevice >> 8) == LG4FF_FFEX_REV_MAJ &&
1207 (bcdDevice & 0xff) == LG4FF_FFEX_REV_MIN)
1208 dev->ff->set_autocenter = lg4ff_set_autocenter_ffex;
1210 dev->ff->set_autocenter = lg4ff_set_autocenter_default;
1212 dev->ff->set_autocenter(dev, 0);
1215 /* Create sysfs interface */
1216 error = device_create_file(&hid->dev, &dev_attr_range);
1218 hid_warn(hid, "Unable to create sysfs interface for \"range\", errno %d\n", error);
1219 if (mmode_ret == LG4FF_MMODE_IS_MULTIMODE) {
1220 error = device_create_file(&hid->dev, &dev_attr_real_id);
1222 hid_warn(hid, "Unable to create sysfs interface for \"real_id\", errno %d\n", error);
1223 error = device_create_file(&hid->dev, &dev_attr_alternate_modes);
1225 hid_warn(hid, "Unable to create sysfs interface for \"alternate_modes\", errno %d\n", error);
1227 dbg_hid("sysfs interface created\n");
1229 /* Set the maximum range to start with */
1230 entry->wdata.range = entry->wdata.max_range;
1231 if (entry->wdata.set_range)
1232 entry->wdata.set_range(hid, entry->wdata.range);
1234 #ifdef CONFIG_LEDS_CLASS
1235 /* register led subsystem - G27 only */
1236 entry->wdata.led_state = 0;
1237 for (j = 0; j < 5; j++)
1238 entry->wdata.led[j] = NULL;
1240 if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_G27_WHEEL) {
1241 struct led_classdev *led;
1245 lg4ff_set_leds(hid, 0);
1247 name_sz = strlen(dev_name(&hid->dev)) + 8;
1249 for (j = 0; j < 5; j++) {
1250 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
1252 hid_err(hid, "can't allocate memory for LED %d\n", j);
1256 name = (void *)(&led[1]);
1257 snprintf(name, name_sz, "%s::RPM%d", dev_name(&hid->dev), j+1);
1259 led->brightness = 0;
1260 led->max_brightness = 1;
1261 led->brightness_get = lg4ff_led_get_brightness;
1262 led->brightness_set = lg4ff_led_set_brightness;
1264 entry->wdata.led[j] = led;
1265 error = led_classdev_register(&hid->dev, led);
1268 hid_err(hid, "failed to register LED %d. Aborting.\n", j);
1270 /* Deregister LEDs (if any) */
1271 for (j = 0; j < 5; j++) {
1272 led = entry->wdata.led[j];
1273 entry->wdata.led[j] = NULL;
1276 led_classdev_unregister(led);
1279 goto out; /* Let the driver continue without LEDs */
1285 hid_info(hid, "Force feedback support for Logitech Gaming Wheels\n");
1289 drv_data->device_props = NULL;
1294 int lg4ff_deinit(struct hid_device *hid)
1296 struct lg4ff_device_entry *entry;
1297 struct lg_drv_data *drv_data;
1299 drv_data = hid_get_drvdata(hid);
1301 hid_err(hid, "Error while deinitializing device, no private driver data.\n");
1304 entry = drv_data->device_props;
1306 goto out; /* Nothing more to do */
1308 /* Multimode devices will have at least the "MODE_NATIVE" bit set */
1309 if (entry->wdata.alternate_modes) {
1310 device_remove_file(&hid->dev, &dev_attr_real_id);
1311 device_remove_file(&hid->dev, &dev_attr_alternate_modes);
1314 device_remove_file(&hid->dev, &dev_attr_range);
1315 #ifdef CONFIG_LEDS_CLASS
1318 struct led_classdev *led;
1320 /* Deregister LEDs (if any) */
1321 for (j = 0; j < 5; j++) {
1323 led = entry->wdata.led[j];
1324 entry->wdata.led[j] = NULL;
1327 led_classdev_unregister(led);
1333 drv_data->device_props = NULL;
1337 dbg_hid("Device successfully unregistered\n");