cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-tmff.c

Directory: drivers/hid
/*
 * Force feedback support for various HID compliant devices by ThrustMaster:
 *    ThrustMaster FireStorm Dual Power 2
 * and possibly others whose device ids haven't been added.
 *
 *  Modified to support ThrustMaster devices by Zinx Verituse
 *  on 2003-01-25 from the Logitech force feedback driver,
 *  which is by Johann Deneux.
 *
 *  Copyright (c) 2003 Zinx Verituse <zinx@epicsol.org>
 *  Copyright (c) 2002 Johann Deneux
 */

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#include <linux/hid.h>
#include <linux/input.h>
#include <linux/slab.h>
#include <linux/module.h>

#include "hid-ids.h"


static const signed short ff_rumble[] = {
	FF_RUMBLE,
	-1
};


static const signed short ff_joystick[] = {
	FF_CONSTANT,
	-1
};

#ifdef CONFIG_THRUSTMASTER_FF

/* Usages for thrustmaster devices I know about */

#define THRUSTMASTER_USAGE_FF	(HID_UP_GENDESK | 0xbb)


struct tmff_device {
	
struct hid_report *report;
	
struct hid_field *ff_field;
};

/* Changes values from 0 to 0xffff into values from minimum to maximum */

static inline int tmff_scale_u16(unsigned int in, int minimum, int maximum) { int ret; ret = (in * (maximum - minimum) / 0xffff) + minimum; if (ret < minimum) return minimum; if (ret > maximum) return maximum; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula4680.70%133.33%
zinx veritusezinx verituse1017.54%133.33%
jiri slabyjiri slaby11.75%133.33%
Total57100.00%3100.00%

/* Changes values from -0x80 to 0x7f into values from minimum to maximum */
static inline int tmff_scale_s8(int in, int minimum, int maximum) { int ret; ret = (((in + 0x80) * (maximum - minimum)) / 0xff) + minimum; if (ret < minimum) return minimum; if (ret > maximum) return maximum; return ret; }

Contributors

PersonTokensPropCommitsCommitProp
dmitry torokhovdmitry torokhov6198.39%150.00%
jiri slabyjiri slaby11.61%150.00%
Total62100.00%2100.00%


static int tmff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct tmff_device *tmff = data; struct hid_field *ff_field = tmff->ff_field; int x, y; int left, right; /* Rumbling */ switch (effect->type) { case FF_CONSTANT: x = tmff_scale_s8(effect->u.ramp.start_level, ff_field->logical_minimum, ff_field->logical_maximum); y = tmff_scale_s8(effect->u.ramp.end_level, ff_field->logical_minimum, ff_field->logical_maximum); dbg_hid("(x, y)=(%04x, %04x)\n", x, y); ff_field->value[0] = x; ff_field->value[1] = y; hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT); break; case FF_RUMBLE: left = tmff_scale_u16(effect->u.rumble.weak_magnitude, ff_field->logical_minimum, ff_field->logical_maximum); right = tmff_scale_u16(effect->u.rumble.strong_magnitude, ff_field->logical_minimum, ff_field->logical_maximum); dbg_hid("(left,right)=(%08x, %08x)\n", left, right); ff_field->value[0] = left; ff_field->value[1] = right; hid_hw_request(hid, tmff->report, HID_REQ_SET_REPORT); break; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
dmitry torokhovdmitry torokhov12251.69%225.00%
anssi hannulaanssi hannula8134.32%112.50%
zinx veritusezinx verituse208.47%112.50%
jiri slabyjiri slaby52.12%112.50%
benjamin tissoiresbenjamin tissoires41.69%112.50%
ben collinsben collins20.85%112.50%
jiri kosinajiri kosina20.85%112.50%
Total236100.00%8100.00%


static int tmff_init(struct hid_device *hid, const signed short *ff_bits) { struct tmff_device *tmff; struct hid_report *report; struct list_head *report_list; struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list); struct input_dev *input_dev = hidinput->input; int error; int i; tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL); if (!tmff) return -ENOMEM; /* Find the report to use */ report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; list_for_each_entry(report, report_list, list) { int fieldnum; for (fieldnum = 0; fieldnum < report->maxfield; ++fieldnum) { struct hid_field *field = report->field[fieldnum]; if (field->maxusage <= 0) continue; switch (field->usage[0].hid) { case THRUSTMASTER_USAGE_FF: if (field->report_count < 2) { hid_warn(hid, "ignoring FF field with report_count < 2\n"); continue; } if (field->logical_maximum == field->logical_minimum) { hid_warn(hid, "ignoring FF field with logical_maximum == logical_minimum\n"); continue; } if (tmff->report && tmff->report != report) { hid_warn(hid, "ignoring FF field in other report\n"); continue; } if (tmff->ff_field && tmff->ff_field != field) { hid_warn(hid, "ignoring duplicate FF field\n"); continue; } tmff->report = report; tmff->ff_field = field; for (i = 0; ff_bits[i] >= 0; i++) set_bit(ff_bits[i], input_dev->ffbit); break; default: hid_warn(hid, "ignoring unknown output usage %08x\n", field->usage[0].hid); continue; } } } if (!tmff->report) { hid_err(hid, "can't find FF field in output reports\n"); error = -ENODEV; goto fail; } error = input_ff_create_memless(input_dev, tmff, tmff_play); if (error) goto fail; hid_info(hid, "force feedback for ThrustMaster devices by Zinx Verituse <zinx@epicsol.org>\n"); return 0; fail: kfree(tmff); return error; }

Contributors

PersonTokensPropCommitsCommitProp
zinx veritusezinx verituse18549.87%110.00%
dmitry torokhovdmitry torokhov6617.79%220.00%
anssi hannulaanssi hannula5414.56%110.00%
jiri slabyjiri slaby246.47%220.00%
li zefanli zefan236.20%110.00%
joe perchesjoe perches133.50%110.00%
ben collinsben collins51.35%110.00%
oliver neukumoliver neukum10.27%110.00%
Total371100.00%10100.00%

#else
static inline int tmff_init(struct hid_device *hid, const signed short *ff_bits) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri kosinajiri kosina21100.00%1100.00%
Total21100.00%1100.00%

#endif
static int tm_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; ret = hid_parse(hdev); if (ret) { hid_err(hdev, "parse failed\n"); goto err; } ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT & ~HID_CONNECT_FF); if (ret) { hid_err(hdev, "hw start failed\n"); goto err; } tmff_init(hdev, (void *)id->driver_data); return 0; err: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby9097.83%150.00%
joe perchesjoe perches22.17%150.00%
Total92100.00%2100.00%

static const struct hid_device_id tm_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb300), .driver_data = (unsigned long)ff_rumble }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb304), /* FireStorm Dual Power 2 (and 3) */ .driver_data = (unsigned long)ff_rumble }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb323), /* Dual Trigger 3-in-1 (PC Mode) */ .driver_data = (unsigned long)ff_rumble }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb324), /* Dual Trigger 3-in-1 (PS3 Mode) */ .driver_data = (unsigned long)ff_rumble }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb651), /* FGT Rumble Force Wheel */ .driver_data = (unsigned long)ff_rumble }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb653), /* RGT Force Feedback CLUTCH Raging Wheel */ .driver_data = (unsigned long)ff_joystick }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb654), /* FGT Force Feedback Wheel */ .driver_data = (unsigned long)ff_joystick }, { HID_USB_DEVICE(USB_VENDOR_ID_THRUSTMASTER, 0xb65a), /* F430 Force Feedback Wheel */ .driver_data = (unsigned long)ff_joystick }, { } }; MODULE_DEVICE_TABLE(hid, tm_devices); static struct hid_driver tm_driver = { .name = "thrustmaster", .id_table = tm_devices, .probe = tm_probe, }; module_hid_driver(tm_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
dmitry torokhovdmitry torokhov27925.04%315.00%
jiri slabyjiri slaby24722.17%210.00%
zinx veritusezinx verituse23621.18%15.00%
anssi hannulaanssi hannula18216.34%15.00%
ruben aos garraldaruben aos garralda393.50%15.00%
jiri kosinajiri kosina353.14%210.00%
li zefanli zefan232.06%15.00%
markus rathgebmarkus rathgeb191.71%15.00%
simon woodsimon wood191.71%15.00%
joe perchesjoe perches151.35%15.00%
ben collinsben collins70.63%15.00%
benjamin tissoiresbenjamin tissoires40.36%15.00%
paul gortmakerpaul gortmaker30.27%15.00%
tejun heotejun heo30.27%15.00%
h hartley sweetenh hartley sweeten20.18%15.00%
oliver neukumoliver neukum10.09%15.00%
Total1114100.00%20100.00%
Directory: drivers/hid
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