cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-dr.c

Directory: drivers/hid
/*
 * Force feedback support for DragonRise Inc. game controllers
 *
 * From what I have gathered, these devices are mass produced in China and are
 * distributed under several vendors. They often share the same design as
 * the original PlayStation DualShock controller.
 *
 * 0079:0006 "DragonRise Inc.   Generic   USB  Joystick  "
 *  - tested with a Tesun USB-703 game controller.
 *
 * Copyright (c) 2009 Richard Walmsley <richwalm@gmail.com>
 */

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

#include "hid-ids.h"

#ifdef CONFIG_DRAGONRISE_FF


struct drff_device {
	
struct hid_report *report;
};


static int drff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct drff_device *drff = data; int strong, weak; strong = effect->u.rumble.strong_magnitude; weak = effect->u.rumble.weak_magnitude; dbg_hid("called with 0x%04x 0x%04x", strong, weak); if (strong || weak) { strong = strong * 0xff / 0xffff; weak = weak * 0xff / 0xffff; /* While reverse engineering this device, I found that when this value is set, it causes the strong rumble to function at a near maximum speed, so we'll bypass it. */ if (weak == 0x0a) weak = 0x0b; drff->report->field[0]->value[0] = 0x51; drff->report->field[0]->value[1] = 0x00; drff->report->field[0]->value[2] = weak; drff->report->field[0]->value[4] = strong; hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT); drff->report->field[0]->value[0] = 0xfa; drff->report->field[0]->value[1] = 0xfe; } else { drff->report->field[0]->value[0] = 0xf3; drff->report->field[0]->value[1] = 0x00; } drff->report->field[0]->value[2] = 0x00; drff->report->field[0]->value[4] = 0x00; dbg_hid("running with 0x%02x 0x%02x", strong, weak); hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
richard walmsleyrichard walmsley29998.68%150.00%
benjamin tissoiresbenjamin tissoires41.32%150.00%
Total303100.00%2100.00%


static int drff_init(struct hid_device *hid) { struct drff_device *drff; struct hid_report *report; struct hid_input *hidinput = list_first_entry(&hid->inputs, struct hid_input, list); struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; struct input_dev *dev = hidinput->input; int error; if (list_empty(report_list)) { hid_err(hid, "no output reports found\n"); return -ENODEV; } report = list_first_entry(report_list, struct hid_report, list); if (report->maxfield < 1) { hid_err(hid, "no fields in the report\n"); return -ENODEV; } if (report->field[0]->report_count < 7) { hid_err(hid, "not enough values in the field\n"); return -ENODEV; } drff = kzalloc(sizeof(struct drff_device), GFP_KERNEL); if (!drff) return -ENOMEM; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, drff, drff_play); if (error) { kfree(drff); return error; } drff->report = report; drff->report->field[0]->value[0] = 0xf3; drff->report->field[0]->value[1] = 0x00; drff->report->field[0]->value[2] = 0x00; drff->report->field[0]->value[3] = 0x00; drff->report->field[0]->value[4] = 0x00; drff->report->field[0]->value[5] = 0x00; drff->report->field[0]->value[6] = 0x00; hid_hw_request(hid, drff->report, HID_REQ_SET_REPORT); hid_info(hid, "Force Feedback for DragonRise Inc. " "game controllers by Richard Walmsley <richwalm@gmail.com>\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
richard walmsleyrichard walmsley33397.65%133.33%
joe perchesjoe perches61.76%133.33%
benjamin tissoiresbenjamin tissoires20.59%133.33%
Total341100.00%3100.00%

#else
static inline int drff_init(struct hid_device *hid) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
jiri kosinajiri kosina15100.00%1100.00%
Total15100.00%1100.00%

#endif /* * The original descriptor of joystick with PID 0x0011, represented by DVTech PC * JS19. It seems both copied from another device and a result of confusion * either about the specification or about the program used to create the * descriptor. In any case, it's a wonder it works on Windows. * * Usage Page (Desktop), ; Generic desktop controls (01h) * Usage (Joystick), ; Joystick (04h, application collection) * Collection (Application), * Collection (Logical), * Report Size (8), * Report Count (5), * Logical Minimum (0), * Logical Maximum (255), * Physical Minimum (0), * Physical Maximum (255), * Usage (X), ; X (30h, dynamic value) * Usage (X), ; X (30h, dynamic value) * Usage (X), ; X (30h, dynamic value) * Usage (X), ; X (30h, dynamic value) * Usage (Y), ; Y (31h, dynamic value) * Input (Variable), * Report Size (4), * Report Count (1), * Logical Maximum (7), * Physical Maximum (315), * Unit (Degrees), * Usage (00h), * Input (Variable, Null State), * Unit, * Report Size (1), * Report Count (10), * Logical Maximum (1), * Physical Maximum (1), * Usage Page (Button), ; Button (09h) * Usage Minimum (01h), * Usage Maximum (0Ah), * Input (Variable), * Usage Page (FF00h), ; FF00h, vendor-defined * Report Size (1), * Report Count (10), * Logical Maximum (1), * Physical Maximum (1), * Usage (01h), * Input (Variable), * End Collection, * Collection (Logical), * Report Size (8), * Report Count (4), * Physical Maximum (255), * Logical Maximum (255), * Usage (02h), * Output (Variable), * End Collection, * End Collection */ /* Size of the original descriptor of the PID 0x0011 joystick */ #define PID0011_RDESC_ORIG_SIZE 101 /* Fixed report descriptor for PID 0x011 joystick */ static __u8 pid0011_rdesc_fixed[] = { 0x05, 0x01, /* Usage Page (Desktop), */ 0x09, 0x04, /* Usage (Joystick), */ 0xA1, 0x01, /* Collection (Application), */ 0xA1, 0x02, /* Collection (Logical), */ 0x14, /* Logical Minimum (0), */ 0x75, 0x08, /* Report Size (8), */ 0x95, 0x03, /* Report Count (3), */ 0x81, 0x01, /* Input (Constant), */ 0x26, 0xFF, 0x00, /* Logical Maximum (255), */ 0x95, 0x02, /* Report Count (2), */ 0x09, 0x30, /* Usage (X), */ 0x09, 0x31, /* Usage (Y), */ 0x81, 0x02, /* Input (Variable), */ 0x75, 0x01, /* Report Size (1), */ 0x95, 0x04, /* Report Count (4), */ 0x81, 0x01, /* Input (Constant), */ 0x25, 0x01, /* Logical Maximum (1), */ 0x95, 0x0A, /* Report Count (10), */ 0x05, 0x09, /* Usage Page (Button), */ 0x19, 0x01, /* Usage Minimum (01h), */ 0x29, 0x0A, /* Usage Maximum (0Ah), */ 0x81, 0x02, /* Input (Variable), */ 0x95, 0x0A, /* Report Count (10), */ 0x81, 0x01, /* Input (Constant), */ 0xC0, /* End Collection, */ 0xC0 /* End Collection */ }; static __u8 pid0006_rdesc_fixed[] = { 0x05, 0x01, /* Usage Page (Generic Desktop) */ 0x09, 0x04, /* Usage (Joystick) */ 0xA1, 0x01, /* Collection (Application) */ 0xA1, 0x02, /* Collection (Logical) */ 0x75, 0x08, /* Report Size (8) */ 0x95, 0x05, /* Report Count (5) */ 0x15, 0x00, /* Logical Minimum (0) */ 0x26, 0xFF, 0x00, /* Logical Maximum (255) */ 0x35, 0x00, /* Physical Minimum (0) */ 0x46, 0xFF, 0x00, /* Physical Maximum (255) */ 0x09, 0x30, /* Usage (X) */ 0x09, 0x33, /* Usage (Ry) */ 0x09, 0x32, /* Usage (Z) */ 0x09, 0x31, /* Usage (Y) */ 0x09, 0x34, /* Usage (Ry) */ 0x81, 0x02, /* Input (Variable) */ 0x75, 0x04, /* Report Size (4) */ 0x95, 0x01, /* Report Count (1) */ 0x25, 0x07, /* Logical Maximum (7) */ 0x46, 0x3B, 0x01, /* Physical Maximum (315) */ 0x65, 0x14, /* Unit (Centimeter) */ 0x09, 0x39, /* Usage (Hat switch) */ 0x81, 0x42, /* Input (Variable) */ 0x65, 0x00, /* Unit (None) */ 0x75, 0x01, /* Report Size (1) */ 0x95, 0x0C, /* Report Count (12) */ 0x25, 0x01, /* Logical Maximum (1) */ 0x45, 0x01, /* Physical Maximum (1) */ 0x05, 0x09, /* Usage Page (Button) */ 0x19, 0x01, /* Usage Minimum (0x01) */ 0x29, 0x0C, /* Usage Maximum (0x0C) */ 0x81, 0x02, /* Input (Variable) */ 0x06, 0x00, 0xFF, /* Usage Page (Vendor Defined) */ 0x75, 0x01, /* Report Size (1) */ 0x95, 0x08, /* Report Count (8) */ 0x25, 0x01, /* Logical Maximum (1) */ 0x45, 0x01, /* Physical Maximum (1) */ 0x09, 0x01, /* Usage (0x01) */ 0x81, 0x02, /* Input (Variable) */ 0xC0, /* End Collection */ 0xA1, 0x02, /* Collection (Logical) */ 0x75, 0x08, /* Report Size (8) */ 0x95, 0x07, /* Report Count (7) */ 0x46, 0xFF, 0x00, /* Physical Maximum (255) */ 0x26, 0xFF, 0x00, /* Logical Maximum (255) */ 0x09, 0x02, /* Usage (0x02) */ 0x91, 0x02, /* Output (Variable) */ 0xC0, /* End Collection */ 0xC0 /* End Collection */ };
static __u8 *dr_report_fixup(struct hid_device *hdev, __u8 *rdesc, unsigned int *rsize) { switch (hdev->product) { case 0x0011: if (*rsize == PID0011_RDESC_ORIG_SIZE) { rdesc = pid0011_rdesc_fixed; *rsize = sizeof(pid0011_rdesc_fixed); } break; case 0x0006: if (*rsize == sizeof(pid0006_rdesc_fixed)) { rdesc = pid0006_rdesc_fixed; *rsize = sizeof(pid0006_rdesc_fixed); } break; } return rdesc; }

Contributors

PersonTokensPropCommitsCommitProp
nikolai kondrashovnikolai kondrashov5767.06%150.00%
maciej zukmaciej zuk2832.94%150.00%
Total85100.00%2100.00%


static int dr_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; dev_dbg(&hdev->dev, "DragonRise Inc. HID hardware probe..."); 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; } switch (hdev->product) { case 0x0006: ret = drff_init(hdev); if (ret) { dev_err(&hdev->dev, "force feedback init failed\n"); hid_hw_stop(hdev); goto err; } break; } return 0; err: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
richard walmsleyrichard walmsley9269.70%133.33%
nikolai kondrashovnikolai kondrashov3828.79%133.33%
joe perchesjoe perches21.52%133.33%
Total132100.00%3100.00%

static const struct hid_device_id dr_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0006), }, { HID_USB_DEVICE(USB_VENDOR_ID_DRAGONRISE, 0x0011), }, { } }; MODULE_DEVICE_TABLE(hid, dr_devices); static struct hid_driver dr_driver = { .name = "dragonrise", .id_table = dr_devices, .report_fixup = dr_report_fixup, .probe = dr_probe, }; module_hid_driver(dr_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
richard walmsleyrichard walmsley80258.07%110.00%
maciej zukmaciej zuk28620.71%110.00%
nikolai kondrashovnikolai kondrashov24717.89%110.00%
jiri kosinajiri kosina221.59%110.00%
joe perchesjoe perches80.58%110.00%
benjamin tissoiresbenjamin tissoires60.43%110.00%
paul gortmakerpaul gortmaker30.22%110.00%
tejun heotejun heo30.22%110.00%
h hartley sweetenh hartley sweeten20.14%110.00%
antonio ospiteantonio ospite20.14%110.00%
Total1381100.00%10100.00%
Directory: drivers/hid
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