Merge branch '3.2-without-smb2' of git://git.samba.org/sfrench/cifs-2.6
[pandora-kernel.git] / drivers / hid / hid-lg4ff.c
1 /*
2  *  Force feedback support for Logitech Speed Force Wireless
3  *
4  *  http://wiibrew.org/wiki/Logitech_USB_steering_wheel
5  *
6  *  Copyright (c) 2010 Simon Wood <simon@mungewell.org>
7  */
8
9 /*
10  * This program is free software; you can redistribute it and/or modify
11  * it under the terms of the GNU General Public License as published by
12  * the Free Software Foundation; either version 2 of the License, or
13  * (at your option) any later version.
14  *
15  * This program is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18  * GNU General Public License for more details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with this program; if not, write to the Free Software
22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23  */
24
25
26 #include <linux/input.h>
27 #include <linux/usb.h>
28 #include <linux/hid.h>
29
30 #include "usbhid/usbhid.h"
31 #include "hid-lg.h"
32 #include "hid-ids.h"
33
34 #define DFGT_REV_MAJ 0x13
35 #define DFGT_REV_MIN 0x22
36 #define DFP_REV_MAJ 0x11
37 #define DFP_REV_MIN 0x06
38 #define FFEX_REV_MAJ 0x21
39 #define FFEX_REV_MIN 0x00
40 #define G25_REV_MAJ 0x12
41 #define G25_REV_MIN 0x22
42 #define G27_REV_MAJ 0x12
43 #define G27_REV_MIN 0x38
44
45 #define to_hid_device(pdev) container_of(pdev, struct hid_device, dev)
46
47 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, u16 range);
48 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range);
49 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf);
50 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count);
51
52 static DEVICE_ATTR(range, S_IRWXU | S_IRWXG | S_IRWXO, lg4ff_range_show, lg4ff_range_store);
53
54 static bool list_inited;
55
56 struct lg4ff_device_entry {
57         char  *device_id;       /* Use name in respective kobject structure's address as the ID */
58         __u16 range;
59         __u16 min_range;
60         __u16 max_range;
61         __u8  leds;
62         struct list_head list;
63         void (*set_range)(struct hid_device *hid, u16 range);
64 };
65
66 static struct lg4ff_device_entry device_list;
67
68 static const signed short lg4ff_wheel_effects[] = {
69         FF_CONSTANT,
70         FF_AUTOCENTER,
71         -1
72 };
73
74 struct lg4ff_wheel {
75         const __u32 product_id;
76         const signed short *ff_effects;
77         const __u16 min_range;
78         const __u16 max_range;
79         void (*set_range)(struct hid_device *hid, u16 range);
80 };
81
82 static const struct lg4ff_wheel lg4ff_devices[] = {
83         {USB_DEVICE_ID_LOGITECH_WHEEL,       lg4ff_wheel_effects, 40, 270, NULL},
84         {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL,  lg4ff_wheel_effects, 40, 270, NULL},
85         {USB_DEVICE_ID_LOGITECH_DFP_WHEEL,   lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_dfp},
86         {USB_DEVICE_ID_LOGITECH_G25_WHEEL,   lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
87         {USB_DEVICE_ID_LOGITECH_DFGT_WHEEL,  lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
88         {USB_DEVICE_ID_LOGITECH_G27_WHEEL,   lg4ff_wheel_effects, 40, 900, hid_lg4ff_set_range_g25},
89         {USB_DEVICE_ID_LOGITECH_MOMO_WHEEL2, lg4ff_wheel_effects, 40, 270, NULL},
90         {USB_DEVICE_ID_LOGITECH_WII_WHEEL,   lg4ff_wheel_effects, 40, 270, NULL}
91 };
92
93 struct lg4ff_native_cmd {
94         const __u8 cmd_num;     /* Number of commands to send */
95         const __u8 cmd[];
96 };
97
98 struct lg4ff_usb_revision {
99         const __u16 rev_maj;
100         const __u16 rev_min;
101         const struct lg4ff_native_cmd *command;
102 };
103
104 static const struct lg4ff_native_cmd native_dfp = {
105         1,
106         {0xf8, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00}
107 };
108
109 static const struct lg4ff_native_cmd native_dfgt = {
110         2,
111         {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00,      /* 1st command */
112          0xf8, 0x09, 0x03, 0x01, 0x00, 0x00, 0x00}      /* 2nd command */
113 };
114
115 static const struct lg4ff_native_cmd native_g25 = {
116         1,
117         {0xf8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00}
118 };
119
120 static const struct lg4ff_native_cmd native_g27 = {
121         2,
122         {0xf8, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00,      /* 1st command */
123          0xf8, 0x09, 0x04, 0x01, 0x00, 0x00, 0x00}      /* 2nd command */
124 };
125
126 static const struct lg4ff_usb_revision lg4ff_revs[] = {
127         {DFGT_REV_MAJ, DFGT_REV_MIN, &native_dfgt},     /* Driving Force GT */
128         {DFP_REV_MAJ,  DFP_REV_MIN,  &native_dfp},      /* Driving Force Pro */
129         {G25_REV_MAJ,  G25_REV_MIN,  &native_g25},      /* G25 */
130         {G27_REV_MAJ,  G27_REV_MIN,  &native_g27},      /* G27 */
131 };
132
133 static int hid_lg4ff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
134 {
135         struct hid_device *hid = input_get_drvdata(dev);
136         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
137         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
138         int x;
139
140 #define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
141
142         switch (effect->type) {
143         case FF_CONSTANT:
144                 x = effect->u.ramp.start_level + 0x80;  /* 0x80 is no force */
145                 CLAMP(x);
146                 report->field[0]->value[0] = 0x11;      /* Slot 1 */
147                 report->field[0]->value[1] = 0x08;
148                 report->field[0]->value[2] = x;
149                 report->field[0]->value[3] = 0x80;
150                 report->field[0]->value[4] = 0x00;
151                 report->field[0]->value[5] = 0x00;
152                 report->field[0]->value[6] = 0x00;
153
154                 usbhid_submit_report(hid, report, USB_DIR_OUT);
155                 break;
156         }
157         return 0;
158 }
159
160 /* Sends default autocentering command compatible with
161  * all wheels except Formula Force EX */
162 static void hid_lg4ff_set_autocenter_default(struct input_dev *dev, u16 magnitude)
163 {
164         struct hid_device *hid = input_get_drvdata(dev);
165         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
166         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
167
168         report->field[0]->value[0] = 0xfe;
169         report->field[0]->value[1] = 0x0d;
170         report->field[0]->value[2] = magnitude >> 13;
171         report->field[0]->value[3] = magnitude >> 13;
172         report->field[0]->value[4] = magnitude >> 8;
173         report->field[0]->value[5] = 0x00;
174         report->field[0]->value[6] = 0x00;
175
176         usbhid_submit_report(hid, report, USB_DIR_OUT);
177 }
178
179 /* Sends autocentering command compatible with Formula Force EX */
180 static void hid_lg4ff_set_autocenter_ffex(struct input_dev *dev, u16 magnitude)
181 {
182         struct hid_device *hid = input_get_drvdata(dev);
183         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
184         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
185         magnitude = magnitude * 90 / 65535;
186         
187
188         report->field[0]->value[0] = 0xfe;
189         report->field[0]->value[1] = 0x03;
190         report->field[0]->value[2] = magnitude >> 14;
191         report->field[0]->value[3] = magnitude >> 14;
192         report->field[0]->value[4] = magnitude;
193         report->field[0]->value[5] = 0x00;
194         report->field[0]->value[6] = 0x00;
195
196         usbhid_submit_report(hid, report, USB_DIR_OUT);
197 }
198
199 /* Sends command to set range compatible with G25/G27/Driving Force GT */
200 static void hid_lg4ff_set_range_g25(struct hid_device *hid, u16 range)
201 {
202         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
203         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
204         dbg_hid("G25/G27/DFGT: setting range to %u\n", range);
205
206         report->field[0]->value[0] = 0xf8;
207         report->field[0]->value[1] = 0x81;
208         report->field[0]->value[2] = range & 0x00ff;
209         report->field[0]->value[3] = (range & 0xff00) >> 8;
210         report->field[0]->value[4] = 0x00;
211         report->field[0]->value[5] = 0x00;
212         report->field[0]->value[6] = 0x00;
213
214         usbhid_submit_report(hid, report, USB_DIR_OUT);
215 }
216
217 /* Sends commands to set range compatible with Driving Force Pro wheel */
218 static void hid_lg4ff_set_range_dfp(struct hid_device *hid, __u16 range)
219 {
220         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
221         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
222         int start_left, start_right, full_range;
223         dbg_hid("Driving Force Pro: setting range to %u\n", range);
224
225         /* Prepare "coarse" limit command */
226         report->field[0]->value[0] = 0xf8;
227         report->field[0]->value[1] = 0x00;      /* Set later */
228         report->field[0]->value[2] = 0x00;
229         report->field[0]->value[3] = 0x00;
230         report->field[0]->value[4] = 0x00;
231         report->field[0]->value[5] = 0x00;
232         report->field[0]->value[6] = 0x00;
233
234         if (range > 200) {
235                 report->field[0]->value[1] = 0x03;
236                 full_range = 900;
237         } else {
238                 report->field[0]->value[1] = 0x02;
239                 full_range = 200;
240         }
241         usbhid_submit_report(hid, report, USB_DIR_OUT);
242
243         /* Prepare "fine" limit command */
244         report->field[0]->value[0] = 0x81;
245         report->field[0]->value[1] = 0x0b;
246         report->field[0]->value[2] = 0x00;
247         report->field[0]->value[3] = 0x00;
248         report->field[0]->value[4] = 0x00;
249         report->field[0]->value[5] = 0x00;
250         report->field[0]->value[6] = 0x00;
251
252         if (range == 200 || range == 900) {     /* Do not apply any fine limit */
253                 usbhid_submit_report(hid, report, USB_DIR_OUT);
254                 return;
255         }
256
257         /* Construct fine limit command */
258         start_left = (((full_range - range + 1) * 2047) / full_range);
259         start_right = 0xfff - start_left;
260
261         report->field[0]->value[2] = start_left >> 4;
262         report->field[0]->value[3] = start_right >> 4;
263         report->field[0]->value[4] = 0xff;
264         report->field[0]->value[5] = (start_right & 0xe) << 4 | (start_left & 0xe);
265         report->field[0]->value[6] = 0xff;
266
267         usbhid_submit_report(hid, report, USB_DIR_OUT);
268 }
269
270 static void hid_lg4ff_switch_native(struct hid_device *hid, const struct lg4ff_native_cmd *cmd)
271 {
272         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
273         struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
274         __u8 i, j;
275
276         j = 0;
277         while (j < 7*cmd->cmd_num) {
278                 for (i = 0; i < 7; i++)
279                         report->field[0]->value[i] = cmd->cmd[j++];
280
281                 usbhid_submit_report(hid, report, USB_DIR_OUT);
282         }
283 }
284
285 /* Read current range and display it in terminal */
286 static ssize_t lg4ff_range_show(struct device *dev, struct device_attribute *attr, char *buf)
287 {
288         struct lg4ff_device_entry *uninitialized_var(entry);
289         struct list_head *h;
290         struct hid_device *hid = to_hid_device(dev);
291         size_t count;
292
293         list_for_each(h, &device_list.list) {
294                 entry = list_entry(h, struct lg4ff_device_entry, list);
295                 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
296                         break;
297         }
298         if (h == &device_list.list) {
299                 dbg_hid("Device not found!");
300                 return 0;
301         }
302
303         count = scnprintf(buf, PAGE_SIZE, "%u\n", entry->range);
304         return count;
305 }
306
307 /* Set range to user specified value, call appropriate function
308  * according to the type of the wheel */
309 static ssize_t lg4ff_range_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count)
310 {
311         struct lg4ff_device_entry *uninitialized_var(entry);
312         struct list_head *h;
313         struct hid_device *hid = to_hid_device(dev);
314         __u16 range = simple_strtoul(buf, NULL, 10);
315
316         list_for_each(h, &device_list.list) {
317                 entry = list_entry(h, struct lg4ff_device_entry, list);
318                 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0)
319                         break;
320         }
321         if (h == &device_list.list) {
322                 dbg_hid("Device not found!");
323                 return count;
324         }
325
326         if (range == 0)
327                 range = entry->max_range;
328
329         /* Check if the wheel supports range setting
330          * and that the range is within limits for the wheel */
331         if (entry->set_range != NULL && range >= entry->min_range && range <= entry->max_range) {
332                 entry->set_range(hid, range);
333                 entry->range = range;
334         }
335
336         return count;
337 }
338
339 int lg4ff_init(struct hid_device *hid)
340 {
341         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
342         struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
343         struct input_dev *dev = hidinput->input;
344         struct hid_report *report;
345         struct hid_field *field;
346         struct lg4ff_device_entry *entry;
347         struct usb_device_descriptor *udesc;
348         int error, i, j;
349         __u16 bcdDevice, rev_maj, rev_min;
350
351         /* Find the report to use */
352         if (list_empty(report_list)) {
353                 hid_err(hid, "No output report found\n");
354                 return -1;
355         }
356
357         /* Check that the report looks ok */
358         report = list_entry(report_list->next, struct hid_report, list);
359         if (!report) {
360                 hid_err(hid, "NULL output report\n");
361                 return -1;
362         }
363
364         field = report->field[0];
365         if (!field) {
366                 hid_err(hid, "NULL field\n");
367                 return -1;
368         }
369
370         /* Check what wheel has been connected */
371         for (i = 0; i < ARRAY_SIZE(lg4ff_devices); i++) {
372                 if (hid->product == lg4ff_devices[i].product_id) {
373                         dbg_hid("Found compatible device, product ID %04X\n", lg4ff_devices[i].product_id);
374                         break;
375                 }
376         }
377
378         if (i == ARRAY_SIZE(lg4ff_devices)) {
379                 hid_err(hid, "Device is not supported by lg4ff driver. If you think it should be, consider reporting a bug to"
380                              "LKML, Simon Wood <simon@mungewell.org> or Michal Maly <madcatxster@gmail.com>\n");
381                 return -1;
382         }
383
384         /* Attempt to switch wheel to native mode when applicable */
385         udesc = &(hid_to_usb_dev(hid)->descriptor);
386         if (!udesc) {
387                 hid_err(hid, "NULL USB device descriptor\n");
388                 return -1;
389         }
390         bcdDevice = le16_to_cpu(udesc->bcdDevice);
391         rev_maj = bcdDevice >> 8;
392         rev_min = bcdDevice & 0xff;
393
394         if (lg4ff_devices[i].product_id == USB_DEVICE_ID_LOGITECH_WHEEL) {
395                 dbg_hid("Generic wheel detected, can it do native?\n");
396                 dbg_hid("USB revision: %2x.%02x\n", rev_maj, rev_min);
397
398                 for (j = 0; j < ARRAY_SIZE(lg4ff_revs); j++) {
399                         if (lg4ff_revs[j].rev_maj == rev_maj && lg4ff_revs[j].rev_min == rev_min) {
400                                 hid_lg4ff_switch_native(hid, lg4ff_revs[j].command);
401                                 hid_info(hid, "Switched to native mode\n");
402                         }
403                 }
404         }
405
406         /* Set supported force feedback capabilities */
407         for (j = 0; lg4ff_devices[i].ff_effects[j] >= 0; j++)
408                 set_bit(lg4ff_devices[i].ff_effects[j], dev->ffbit);
409
410         error = input_ff_create_memless(dev, NULL, hid_lg4ff_play);
411
412         if (error)
413                 return error;
414
415         /* Check if autocentering is available and
416          * set the centering force to zero by default */
417         if (test_bit(FF_AUTOCENTER, dev->ffbit)) {
418                 if(rev_maj == FFEX_REV_MAJ && rev_min == FFEX_REV_MIN)  /* Formula Force EX expects different autocentering command */
419                         dev->ff->set_autocenter = hid_lg4ff_set_autocenter_ffex;
420                 else
421                         dev->ff->set_autocenter = hid_lg4ff_set_autocenter_default;
422
423                 dev->ff->set_autocenter(dev, 0);
424         }
425
426                 /* Initialize device_list if this is the first device to handle by lg4ff */
427         if (!list_inited) {
428                 INIT_LIST_HEAD(&device_list.list);
429                 list_inited = 1;
430         }
431
432         /* Add the device to device_list */
433         entry = (struct lg4ff_device_entry *)kzalloc(sizeof(struct lg4ff_device_entry), GFP_KERNEL);
434         if (!entry) {
435                 hid_err(hid, "Cannot add device, insufficient memory.\n");
436                 return -ENOMEM;
437         }
438         entry->device_id = kstrdup((&hid->dev)->kobj.name, GFP_KERNEL);
439         if (!entry->device_id) {
440                 hid_err(hid, "Cannot set device_id, insufficient memory.\n");
441                 kfree(entry);
442                 return -ENOMEM;
443         }
444         entry->min_range = lg4ff_devices[i].min_range;
445         entry->max_range = lg4ff_devices[i].max_range;
446         entry->set_range = lg4ff_devices[i].set_range;
447         list_add(&entry->list, &device_list.list);
448
449         /* Create sysfs interface */
450         error = device_create_file(&hid->dev, &dev_attr_range);
451         if (error)
452                 return error;
453         dbg_hid("sysfs interface created\n");
454
455         /* Set the maximum range to start with */
456         entry->range = entry->max_range;
457         if (entry->set_range != NULL)
458                 entry->set_range(hid, entry->range);
459
460         hid_info(hid, "Force feedback for Logitech Speed Force Wireless by Simon Wood <simon@mungewell.org>\n");
461         return 0;
462 }
463
464 int lg4ff_deinit(struct hid_device *hid)
465 {
466         bool found = 0;
467         struct lg4ff_device_entry *entry;
468         struct list_head *h, *g;
469         list_for_each_safe(h, g, &device_list.list) {
470                 entry = list_entry(h, struct lg4ff_device_entry, list);
471                 if (strcmp(entry->device_id, (&hid->dev)->kobj.name) == 0) {
472                         list_del(h);
473                         kfree(entry->device_id);
474                         kfree(entry);
475                         found = 1;
476                         break;
477                 }
478         }
479
480         if (!found) {
481                 dbg_hid("Device entry not found!\n");
482                 return -1;
483         }
484
485         device_remove_file(&hid->dev, &dev_attr_range);
486         dbg_hid("Device successfully unregistered\n");
487         return 0;
488 }