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Commit b55ebc27 authored by Sergei Kolzun's avatar Sergei Kolzun Committed by Jiri Kosina
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HID: ACRUX - handle gamepads with different report layout 



There are gamepads that share the same VID and PID but have different
report structure - instead of having 4 fields with one value they have
one field that can hold all 4 values. Make the driver cope with devices
using both styles.

Signed-off-by: default avatarSergei Kolzun <x0r@dv-life.ru>
Signed-off-by: default avatarDmitry Torokhov <dtor@mail.ru>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 364b936f

drivers/hid/hid-axff.c

+24 −12
Original line number Diff line number Diff line
@@ -6,7 +6,7 @@ 
 * Xbox 360 controller.

 *

 * 1a34:0802 "ACRUX USB GAMEPAD 8116"

 *  - tested with a EXEQ EQ-PCU-02090 game controller.

 *  - tested with an EXEQ EQ-PCU-02090 game controller.

 *

 * Copyright (c) 2010 Sergei Kolzun <x0r@dv-life.ru>

 */
@@ -45,7 +45,10 @@ static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect 
{

	struct hid_device *hid = input_get_drvdata(dev);

	struct axff_device *axff = data;

	struct hid_report *report = axff->report;

	int field_count = 0;

	int left, right;

	int i, j;



	left = effect->u.rumble.strong_magnitude;

	right = effect->u.rumble.weak_magnitude;
@@ -55,10 +58,14 @@ static int axff_play(struct input_dev *dev, void *data, struct ff_effect *effect 
	left = left * 0xff / 0xffff;

	right = right * 0xff / 0xffff;



	axff->report->field[0]->value[0] = left;

	axff->report->field[1]->value[0] = right;

	axff->report->field[2]->value[0] = left;

	axff->report->field[3]->value[0] = right;

	for (i = 0; i < report->maxfield; i++) {

		for (j = 0; j < report->field[i]->report_count; j++) {

			report->field[i]->value[j] =

				field_count % 2 ? right : left;

			field_count++;

		}

	}



	dbg_hid("running with 0x%02x 0x%02x", left, right);

	usbhid_submit_report(hid, axff->report, USB_DIR_OUT);
@@ -72,6 +79,8 @@ static int axff_init(struct hid_device *hid) 
	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 field_count = 0;

	int i, j;

	int error;



	if (list_empty(report_list)) {
@@ -80,9 +89,16 @@ static int axff_init(struct hid_device *hid) 
	}



	report = list_first_entry(report_list, struct hid_report, list);

	for (i = 0; i < report->maxfield; i++) {

		for (j = 0; j < report->field[i]->report_count; j++) {

			report->field[i]->value[j] = 0x00;

			field_count++;

		}

	}



	if (report->maxfield < 4) {

		hid_err(hid, "no fields in the report: %d\n", report->maxfield);

	if (field_count < 4) {

		hid_err(hid, "not enough fields in the report: %d\n",

			field_count);

		return -ENODEV;

	}
@@ -97,10 +113,6 @@ static int axff_init(struct hid_device *hid) 
		goto err_free_mem;



	axff->report = report;

	axff->report->field[0]->value[0] = 0x00;

	axff->report->field[1]->value[0] = 0x00;

	axff->report->field[2]->value[0] = 0x00;

	axff->report->field[3]->value[0] = 0x00;

	usbhid_submit_report(hid, axff->report, USB_DIR_OUT);



	hid_info(hid, "Force Feedback for ACRUX game controllers by Sergei Kolzun <x0r@dv-life.ru>\n");