cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/hid-pl.c

Directory: drivers/hid
/*
 *  Force feedback support for PantherLord/GreenAsia based devices
 *
 *  The devices are distributed under various names and the same USB device ID
 *  can be used in both adapters and actual game controllers.
 *
 *  0810:0001 "Twin USB Joystick"
 *   - tested with PantherLord USB/PS2 2in1 Adapter
 *   - contains two reports, one for each port (HID_QUIRK_MULTI_INPUT)
 *
 *  0e8f:0003 "GreenAsia Inc.    USB Joystick     "
 *   - tested with König Gaming gamepad
 *
 *  0e8f:0003 "GASIA USB Gamepad"
 *   - another version of the König gamepad
 *
 *  0f30:0111 "Saitek Color Rumble Pad"
 *
 *  Copyright (c) 2007, 2009 Anssi Hannula <anssi.hannula@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
 */


/* #define DEBUG */


#define debug(format, arg...) pr_debug("hid-plff: " format "\n" , ## arg)

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

#include "hid-ids.h"

#ifdef CONFIG_PANTHERLORD_FF


struct plff_device {
	
struct hid_report *report;
	
s32 maxval;
	
s32 *strong;
	
s32 *weak;
};


static int hid_plff_play(struct input_dev *dev, void *data, struct ff_effect *effect) { struct hid_device *hid = input_get_drvdata(dev); struct plff_device *plff = data; int left, right; left = effect->u.rumble.strong_magnitude; right = effect->u.rumble.weak_magnitude; debug("called with 0x%04x 0x%04x", left, right); left = left * plff->maxval / 0xffff; right = right * plff->maxval / 0xffff; *plff->strong = left; *plff->weak = right; debug("running with 0x%02x 0x%02x", left, right); hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula11791.41%240.00%
michael karchermichael karcher64.69%120.00%
dmitry torokhovdmitry torokhov32.34%120.00%
benjamin tissoiresbenjamin tissoires21.56%120.00%
Total128100.00%5100.00%


static int plff_init(struct hid_device *hid) { struct plff_device *plff; struct hid_report *report; struct hid_input *hidinput; struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list; struct list_head *report_ptr = report_list; struct input_dev *dev; int error; s32 maxval; s32 *strong; s32 *weak; /* The device contains one output report per physical device, all containing 1 field, which contains 4 ff00.0002 usages and 4 16bit absolute values. The input reports also contain a field which contains 8 ff00.0001 usages and 8 boolean values. Their meaning is currently unknown. A version of the 0e8f:0003 exists that has all the values in separate fields and misses the extra input field, thus resembling Zeroplus (hid-zpff) devices. */ if (list_empty(report_list)) { hid_err(hid, "no output reports found\n"); return -ENODEV; } list_for_each_entry(hidinput, &hid->inputs, list) { report_ptr = report_ptr->next; if (report_ptr == report_list) { hid_err(hid, "required output report is missing\n"); return -ENODEV; } report = list_entry(report_ptr, struct hid_report, list); if (report->maxfield < 1) { hid_err(hid, "no fields in the report\n"); return -ENODEV; } maxval = 0x7f; if (report->field[0]->report_count >= 4) { report->field[0]->value[0] = 0x00; report->field[0]->value[1] = 0x00; strong = &report->field[0]->value[2]; weak = &report->field[0]->value[3]; debug("detected single-field device"); } else if (report->field[0]->maxusage == 1 && report->field[0]->usage[0].hid == (HID_UP_LED | 0x43) && report->maxfield >= 4 && report->field[0]->report_count >= 1 && report->field[1]->report_count >= 1 && report->field[2]->report_count >= 1 && report->field[3]->report_count >= 1) { report->field[0]->value[0] = 0x00; report->field[1]->value[0] = 0x00; strong = &report->field[2]->value[0]; weak = &report->field[3]->value[0]; if (hid->vendor == USB_VENDOR_ID_JESS2) maxval = 0xff; debug("detected 4-field device"); } else { hid_err(hid, "not enough fields or values\n"); return -ENODEV; } plff = kzalloc(sizeof(struct plff_device), GFP_KERNEL); if (!plff) return -ENOMEM; dev = hidinput->input; set_bit(FF_RUMBLE, dev->ffbit); error = input_ff_create_memless(dev, plff, hid_plff_play); if (error) { kfree(plff); return error; } plff->report = report; plff->strong = strong; plff->weak = weak; plff->maxval = maxval; *strong = 0x00; *weak = 0x00; hid_hw_request(hid, plff->report, HID_REQ_SET_REPORT); } hid_info(hid, "Force feedback for PantherLord/GreenAsia devices by Anssi Hannula <anssi.hannula@gmail.com>\n"); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula43281.51%225.00%
kees cookkees cook509.43%112.50%
michael karchermichael karcher254.72%112.50%
jiri slabyjiri slaby142.64%225.00%
joe perchesjoe perches71.32%112.50%
benjamin tissoiresbenjamin tissoires20.38%112.50%
Total530100.00%8100.00%

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

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby15100.00%1100.00%
Total15100.00%1100.00%

#endif
static int pl_probe(struct hid_device *hdev, const struct hid_device_id *id) { int ret; if (id->driver_data) hdev->quirks |= HID_QUIRK_MULTI_INPUT; 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; } plff_init(hdev); return 0; err: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
jiri slabyjiri slaby9497.92%150.00%
joe perchesjoe perches22.08%150.00%
Total96100.00%2100.00%

static const struct hid_device_id pl_devices[] = { { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PSX_ADAPTOR), .driver_data = 1 }, /* Twin USB Joystick */ { HID_USB_DEVICE(USB_VENDOR_ID_GAMERON, USB_DEVICE_ID_GAMERON_DUAL_PCS_ADAPTOR), .driver_data = 1 }, /* Twin USB Joystick */ { HID_USB_DEVICE(USB_VENDOR_ID_GREENASIA, 0x0003), }, { HID_USB_DEVICE(USB_VENDOR_ID_JESS2, USB_DEVICE_ID_JESS2_COLOR_RUMBLE_PAD), }, { } }; MODULE_DEVICE_TABLE(hid, pl_devices); static struct hid_driver pl_driver = { .name = "pantherlord", .id_table = pl_devices, .probe = pl_probe, }; module_hid_driver(pl_driver); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
anssi hannulaanssi hannula58763.60%215.38%
jiri slabyjiri slaby20321.99%215.38%
kees cookkees cook505.42%17.69%
michael karchermichael karcher444.77%17.69%
jiri kosinajiri kosina151.63%17.69%
joe perchesjoe perches90.98%17.69%
benjamin tissoiresbenjamin tissoires40.43%17.69%
tejun heotejun heo30.33%17.69%
paul gortmakerpaul gortmaker30.33%17.69%
dmitry torokhovdmitry torokhov30.33%17.69%
h hartley sweetenh hartley sweeten20.22%17.69%
Total923100.00%13100.00%
Directory: drivers/hid
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