mirror of https://gitee.com/openkylin/linux.git
1334 lines
36 KiB
C
1334 lines
36 KiB
C
/*
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* Force feedback driver for USB HID PID compliant devices
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*
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* Copyright (c) 2005, 2006 Anssi Hannula <anssi.hannula@gmail.com>
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*/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/* #define DEBUG */
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#define debug(format, arg...) pr_debug("hid-pidff: " format "\n" , ## arg)
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#include <linux/input.h>
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#include <linux/slab.h>
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#include <linux/usb.h>
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#include <linux/hid.h>
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#include "usbhid.h"
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#define PID_EFFECTS_MAX 64
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/* Report usage table used to put reports into an array */
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#define PID_SET_EFFECT 0
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#define PID_EFFECT_OPERATION 1
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#define PID_DEVICE_GAIN 2
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#define PID_POOL 3
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#define PID_BLOCK_LOAD 4
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#define PID_BLOCK_FREE 5
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#define PID_DEVICE_CONTROL 6
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#define PID_CREATE_NEW_EFFECT 7
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#define PID_REQUIRED_REPORTS 7
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#define PID_SET_ENVELOPE 8
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#define PID_SET_CONDITION 9
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#define PID_SET_PERIODIC 10
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#define PID_SET_CONSTANT 11
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#define PID_SET_RAMP 12
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static const u8 pidff_reports[] = {
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0x21, 0x77, 0x7d, 0x7f, 0x89, 0x90, 0x96, 0xab,
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0x5a, 0x5f, 0x6e, 0x73, 0x74
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};
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/* device_control is really 0x95, but 0x96 specified as it is the usage of
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the only field in that report */
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/* Value usage tables used to put fields and values into arrays */
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#define PID_EFFECT_BLOCK_INDEX 0
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#define PID_DURATION 1
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#define PID_GAIN 2
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#define PID_TRIGGER_BUTTON 3
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#define PID_TRIGGER_REPEAT_INT 4
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#define PID_DIRECTION_ENABLE 5
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#define PID_START_DELAY 6
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static const u8 pidff_set_effect[] = {
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0x22, 0x50, 0x52, 0x53, 0x54, 0x56, 0xa7
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};
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#define PID_ATTACK_LEVEL 1
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#define PID_ATTACK_TIME 2
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#define PID_FADE_LEVEL 3
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#define PID_FADE_TIME 4
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static const u8 pidff_set_envelope[] = { 0x22, 0x5b, 0x5c, 0x5d, 0x5e };
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#define PID_PARAM_BLOCK_OFFSET 1
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#define PID_CP_OFFSET 2
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#define PID_POS_COEFFICIENT 3
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#define PID_NEG_COEFFICIENT 4
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#define PID_POS_SATURATION 5
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#define PID_NEG_SATURATION 6
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#define PID_DEAD_BAND 7
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static const u8 pidff_set_condition[] = {
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0x22, 0x23, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65
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};
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#define PID_MAGNITUDE 1
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#define PID_OFFSET 2
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#define PID_PHASE 3
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#define PID_PERIOD 4
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static const u8 pidff_set_periodic[] = { 0x22, 0x70, 0x6f, 0x71, 0x72 };
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static const u8 pidff_set_constant[] = { 0x22, 0x70 };
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#define PID_RAMP_START 1
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#define PID_RAMP_END 2
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static const u8 pidff_set_ramp[] = { 0x22, 0x75, 0x76 };
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#define PID_RAM_POOL_AVAILABLE 1
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static const u8 pidff_block_load[] = { 0x22, 0xac };
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#define PID_LOOP_COUNT 1
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static const u8 pidff_effect_operation[] = { 0x22, 0x7c };
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static const u8 pidff_block_free[] = { 0x22 };
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#define PID_DEVICE_GAIN_FIELD 0
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static const u8 pidff_device_gain[] = { 0x7e };
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#define PID_RAM_POOL_SIZE 0
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#define PID_SIMULTANEOUS_MAX 1
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#define PID_DEVICE_MANAGED_POOL 2
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static const u8 pidff_pool[] = { 0x80, 0x83, 0xa9 };
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/* Special field key tables used to put special field keys into arrays */
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#define PID_ENABLE_ACTUATORS 0
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#define PID_RESET 1
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static const u8 pidff_device_control[] = { 0x97, 0x9a };
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#define PID_CONSTANT 0
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#define PID_RAMP 1
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#define PID_SQUARE 2
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#define PID_SINE 3
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#define PID_TRIANGLE 4
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#define PID_SAW_UP 5
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#define PID_SAW_DOWN 6
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#define PID_SPRING 7
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#define PID_DAMPER 8
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#define PID_INERTIA 9
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#define PID_FRICTION 10
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static const u8 pidff_effect_types[] = {
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0x26, 0x27, 0x30, 0x31, 0x32, 0x33, 0x34,
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0x40, 0x41, 0x42, 0x43
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};
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#define PID_BLOCK_LOAD_SUCCESS 0
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#define PID_BLOCK_LOAD_FULL 1
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static const u8 pidff_block_load_status[] = { 0x8c, 0x8d };
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#define PID_EFFECT_START 0
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#define PID_EFFECT_STOP 1
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static const u8 pidff_effect_operation_status[] = { 0x79, 0x7b };
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struct pidff_usage {
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struct hid_field *field;
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s32 *value;
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};
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struct pidff_device {
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struct hid_device *hid;
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struct hid_report *reports[sizeof(pidff_reports)];
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struct pidff_usage set_effect[sizeof(pidff_set_effect)];
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struct pidff_usage set_envelope[sizeof(pidff_set_envelope)];
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struct pidff_usage set_condition[sizeof(pidff_set_condition)];
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struct pidff_usage set_periodic[sizeof(pidff_set_periodic)];
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struct pidff_usage set_constant[sizeof(pidff_set_constant)];
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struct pidff_usage set_ramp[sizeof(pidff_set_ramp)];
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struct pidff_usage device_gain[sizeof(pidff_device_gain)];
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struct pidff_usage block_load[sizeof(pidff_block_load)];
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struct pidff_usage pool[sizeof(pidff_pool)];
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struct pidff_usage effect_operation[sizeof(pidff_effect_operation)];
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struct pidff_usage block_free[sizeof(pidff_block_free)];
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/* Special field is a field that is not composed of
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usage<->value pairs that pidff_usage values are */
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/* Special field in create_new_effect */
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struct hid_field *create_new_effect_type;
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/* Special fields in set_effect */
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struct hid_field *set_effect_type;
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struct hid_field *effect_direction;
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/* Special field in device_control */
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struct hid_field *device_control;
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/* Special field in block_load */
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struct hid_field *block_load_status;
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/* Special field in effect_operation */
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struct hid_field *effect_operation_status;
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int control_id[sizeof(pidff_device_control)];
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int type_id[sizeof(pidff_effect_types)];
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int status_id[sizeof(pidff_block_load_status)];
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int operation_id[sizeof(pidff_effect_operation_status)];
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int pid_id[PID_EFFECTS_MAX];
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};
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/*
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* Scale an unsigned value with range 0..max for the given field
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*/
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static int pidff_rescale(int i, int max, struct hid_field *field)
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{
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return i * (field->logical_maximum - field->logical_minimum) / max +
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field->logical_minimum;
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}
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/*
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* Scale a signed value in range -0x8000..0x7fff for the given field
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*/
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static int pidff_rescale_signed(int i, struct hid_field *field)
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{
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return i == 0 ? 0 : i >
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0 ? i * field->logical_maximum / 0x7fff : i *
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field->logical_minimum / -0x8000;
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}
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static void pidff_set(struct pidff_usage *usage, u16 value)
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{
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usage->value[0] = pidff_rescale(value, 0xffff, usage->field);
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debug("calculated from %d to %d", value, usage->value[0]);
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}
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static void pidff_set_signed(struct pidff_usage *usage, s16 value)
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{
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if (usage->field->logical_minimum < 0)
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usage->value[0] = pidff_rescale_signed(value, usage->field);
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else {
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if (value < 0)
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usage->value[0] =
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pidff_rescale(-value, 0x8000, usage->field);
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else
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usage->value[0] =
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pidff_rescale(value, 0x7fff, usage->field);
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}
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debug("calculated from %d to %d", value, usage->value[0]);
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}
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/*
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* Send envelope report to the device
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*/
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static void pidff_set_envelope_report(struct pidff_device *pidff,
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struct ff_envelope *envelope)
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{
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pidff->set_envelope[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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pidff->set_envelope[PID_ATTACK_LEVEL].value[0] =
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pidff_rescale(envelope->attack_level >
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0x7fff ? 0x7fff : envelope->attack_level, 0x7fff,
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pidff->set_envelope[PID_ATTACK_LEVEL].field);
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pidff->set_envelope[PID_FADE_LEVEL].value[0] =
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pidff_rescale(envelope->fade_level >
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0x7fff ? 0x7fff : envelope->fade_level, 0x7fff,
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pidff->set_envelope[PID_FADE_LEVEL].field);
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pidff->set_envelope[PID_ATTACK_TIME].value[0] = envelope->attack_length;
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pidff->set_envelope[PID_FADE_TIME].value[0] = envelope->fade_length;
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debug("attack %u => %d", envelope->attack_level,
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pidff->set_envelope[PID_ATTACK_LEVEL].value[0]);
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_ENVELOPE],
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USB_DIR_OUT);
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}
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/*
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* Test if the new envelope differs from old one
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*/
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static int pidff_needs_set_envelope(struct ff_envelope *envelope,
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struct ff_envelope *old)
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{
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return envelope->attack_level != old->attack_level ||
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envelope->fade_level != old->fade_level ||
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envelope->attack_length != old->attack_length ||
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envelope->fade_length != old->fade_length;
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}
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/*
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* Send constant force report to the device
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*/
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static void pidff_set_constant_force_report(struct pidff_device *pidff,
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struct ff_effect *effect)
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{
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pidff->set_constant[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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pidff_set_signed(&pidff->set_constant[PID_MAGNITUDE],
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effect->u.constant.level);
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_CONSTANT],
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USB_DIR_OUT);
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}
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/*
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* Test if the constant parameters have changed between effects
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*/
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static int pidff_needs_set_constant(struct ff_effect *effect,
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struct ff_effect *old)
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{
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return effect->u.constant.level != old->u.constant.level;
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}
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/*
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* Send set effect report to the device
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*/
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static void pidff_set_effect_report(struct pidff_device *pidff,
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struct ff_effect *effect)
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{
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pidff->set_effect[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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pidff->set_effect_type->value[0] =
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pidff->create_new_effect_type->value[0];
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pidff->set_effect[PID_DURATION].value[0] = effect->replay.length;
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pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = effect->trigger.button;
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pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] =
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effect->trigger.interval;
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pidff->set_effect[PID_GAIN].value[0] =
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pidff->set_effect[PID_GAIN].field->logical_maximum;
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pidff->set_effect[PID_DIRECTION_ENABLE].value[0] = 1;
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pidff->effect_direction->value[0] =
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pidff_rescale(effect->direction, 0xffff,
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pidff->effect_direction);
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pidff->set_effect[PID_START_DELAY].value[0] = effect->replay.delay;
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_EFFECT],
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USB_DIR_OUT);
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}
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/*
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* Test if the values used in set_effect have changed
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*/
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static int pidff_needs_set_effect(struct ff_effect *effect,
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struct ff_effect *old)
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{
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return effect->replay.length != old->replay.length ||
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effect->trigger.interval != old->trigger.interval ||
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effect->trigger.button != old->trigger.button ||
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effect->direction != old->direction ||
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effect->replay.delay != old->replay.delay;
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}
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/*
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* Send periodic effect report to the device
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*/
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static void pidff_set_periodic_report(struct pidff_device *pidff,
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struct ff_effect *effect)
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{
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pidff->set_periodic[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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pidff_set_signed(&pidff->set_periodic[PID_MAGNITUDE],
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effect->u.periodic.magnitude);
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pidff_set_signed(&pidff->set_periodic[PID_OFFSET],
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effect->u.periodic.offset);
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pidff_set(&pidff->set_periodic[PID_PHASE], effect->u.periodic.phase);
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pidff->set_periodic[PID_PERIOD].value[0] = effect->u.periodic.period;
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_PERIODIC],
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USB_DIR_OUT);
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}
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/*
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* Test if periodic effect parameters have changed
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*/
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static int pidff_needs_set_periodic(struct ff_effect *effect,
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struct ff_effect *old)
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{
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return effect->u.periodic.magnitude != old->u.periodic.magnitude ||
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effect->u.periodic.offset != old->u.periodic.offset ||
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effect->u.periodic.phase != old->u.periodic.phase ||
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effect->u.periodic.period != old->u.periodic.period;
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}
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/*
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* Send condition effect reports to the device
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*/
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static void pidff_set_condition_report(struct pidff_device *pidff,
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struct ff_effect *effect)
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{
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int i;
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pidff->set_condition[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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for (i = 0; i < 2; i++) {
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pidff->set_condition[PID_PARAM_BLOCK_OFFSET].value[0] = i;
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pidff_set_signed(&pidff->set_condition[PID_CP_OFFSET],
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effect->u.condition[i].center);
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pidff_set_signed(&pidff->set_condition[PID_POS_COEFFICIENT],
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effect->u.condition[i].right_coeff);
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pidff_set_signed(&pidff->set_condition[PID_NEG_COEFFICIENT],
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effect->u.condition[i].left_coeff);
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pidff_set(&pidff->set_condition[PID_POS_SATURATION],
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effect->u.condition[i].right_saturation);
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pidff_set(&pidff->set_condition[PID_NEG_SATURATION],
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effect->u.condition[i].left_saturation);
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pidff_set(&pidff->set_condition[PID_DEAD_BAND],
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effect->u.condition[i].deadband);
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_CONDITION],
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USB_DIR_OUT);
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}
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}
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/*
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* Test if condition effect parameters have changed
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*/
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static int pidff_needs_set_condition(struct ff_effect *effect,
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struct ff_effect *old)
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{
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int i;
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int ret = 0;
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for (i = 0; i < 2; i++) {
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struct ff_condition_effect *cond = &effect->u.condition[i];
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struct ff_condition_effect *old_cond = &old->u.condition[i];
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ret |= cond->center != old_cond->center ||
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cond->right_coeff != old_cond->right_coeff ||
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cond->left_coeff != old_cond->left_coeff ||
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cond->right_saturation != old_cond->right_saturation ||
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cond->left_saturation != old_cond->left_saturation ||
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cond->deadband != old_cond->deadband;
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}
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return ret;
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}
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/*
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* Send ramp force report to the device
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*/
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static void pidff_set_ramp_force_report(struct pidff_device *pidff,
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struct ff_effect *effect)
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{
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pidff->set_ramp[PID_EFFECT_BLOCK_INDEX].value[0] =
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
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pidff_set_signed(&pidff->set_ramp[PID_RAMP_START],
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effect->u.ramp.start_level);
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pidff_set_signed(&pidff->set_ramp[PID_RAMP_END],
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effect->u.ramp.end_level);
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usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_RAMP],
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USB_DIR_OUT);
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}
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/*
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* Test if ramp force parameters have changed
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*/
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static int pidff_needs_set_ramp(struct ff_effect *effect, struct ff_effect *old)
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{
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return effect->u.ramp.start_level != old->u.ramp.start_level ||
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effect->u.ramp.end_level != old->u.ramp.end_level;
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}
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/*
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* Send a request for effect upload to the device
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*
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* Returns 0 if device reported success, -ENOSPC if the device reported memory
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* is full. Upon unknown response the function will retry for 60 times, if
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* still unsuccessful -EIO is returned.
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*/
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static int pidff_request_effect_upload(struct pidff_device *pidff, int efnum)
|
|
{
|
|
int j;
|
|
|
|
pidff->create_new_effect_type->value[0] = efnum;
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_CREATE_NEW_EFFECT],
|
|
USB_DIR_OUT);
|
|
debug("create_new_effect sent, type: %d", efnum);
|
|
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0;
|
|
pidff->block_load_status->value[0] = 0;
|
|
usbhid_wait_io(pidff->hid);
|
|
|
|
for (j = 0; j < 60; j++) {
|
|
debug("pid_block_load requested");
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_BLOCK_LOAD],
|
|
USB_DIR_IN);
|
|
usbhid_wait_io(pidff->hid);
|
|
if (pidff->block_load_status->value[0] ==
|
|
pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) {
|
|
debug("device reported free memory: %d bytes",
|
|
pidff->block_load[PID_RAM_POOL_AVAILABLE].value ?
|
|
pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1);
|
|
return 0;
|
|
}
|
|
if (pidff->block_load_status->value[0] ==
|
|
pidff->status_id[PID_BLOCK_LOAD_FULL]) {
|
|
debug("not enough memory free: %d bytes",
|
|
pidff->block_load[PID_RAM_POOL_AVAILABLE].value ?
|
|
pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1);
|
|
return -ENOSPC;
|
|
}
|
|
}
|
|
printk(KERN_ERR "hid-pidff: pid_block_load failed 60 times\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/*
|
|
* Play the effect with PID id n times
|
|
*/
|
|
static void pidff_playback_pid(struct pidff_device *pidff, int pid_id, int n)
|
|
{
|
|
pidff->effect_operation[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id;
|
|
|
|
if (n == 0) {
|
|
pidff->effect_operation_status->value[0] =
|
|
pidff->operation_id[PID_EFFECT_STOP];
|
|
} else {
|
|
pidff->effect_operation_status->value[0] =
|
|
pidff->operation_id[PID_EFFECT_START];
|
|
pidff->effect_operation[PID_LOOP_COUNT].value[0] = n;
|
|
}
|
|
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_EFFECT_OPERATION],
|
|
USB_DIR_OUT);
|
|
}
|
|
|
|
/**
|
|
* Play the effect with effect id @effect_id for @value times
|
|
*/
|
|
static int pidff_playback(struct input_dev *dev, int effect_id, int value)
|
|
{
|
|
struct pidff_device *pidff = dev->ff->private;
|
|
|
|
pidff_playback_pid(pidff, pidff->pid_id[effect_id], value);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Erase effect with PID id
|
|
*/
|
|
static void pidff_erase_pid(struct pidff_device *pidff, int pid_id)
|
|
{
|
|
pidff->block_free[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id;
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_BLOCK_FREE],
|
|
USB_DIR_OUT);
|
|
}
|
|
|
|
/*
|
|
* Stop and erase effect with effect_id
|
|
*/
|
|
static int pidff_erase_effect(struct input_dev *dev, int effect_id)
|
|
{
|
|
struct pidff_device *pidff = dev->ff->private;
|
|
int pid_id = pidff->pid_id[effect_id];
|
|
|
|
debug("starting to erase %d/%d", effect_id, pidff->pid_id[effect_id]);
|
|
/* Wait for the queue to clear. We do not want a full fifo to
|
|
prevent the effect removal. */
|
|
usbhid_wait_io(pidff->hid);
|
|
pidff_playback_pid(pidff, pid_id, 0);
|
|
pidff_erase_pid(pidff, pid_id);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Effect upload handler
|
|
*/
|
|
static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect,
|
|
struct ff_effect *old)
|
|
{
|
|
struct pidff_device *pidff = dev->ff->private;
|
|
int type_id;
|
|
int error;
|
|
|
|
switch (effect->type) {
|
|
case FF_CONSTANT:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_CONSTANT]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_constant(effect, old))
|
|
pidff_set_constant_force_report(pidff, effect);
|
|
if (!old ||
|
|
pidff_needs_set_envelope(&effect->u.constant.envelope,
|
|
&old->u.constant.envelope))
|
|
pidff_set_envelope_report(pidff,
|
|
&effect->u.constant.envelope);
|
|
break;
|
|
|
|
case FF_PERIODIC:
|
|
if (!old) {
|
|
switch (effect->u.periodic.waveform) {
|
|
case FF_SQUARE:
|
|
type_id = PID_SQUARE;
|
|
break;
|
|
case FF_TRIANGLE:
|
|
type_id = PID_TRIANGLE;
|
|
break;
|
|
case FF_SINE:
|
|
type_id = PID_SINE;
|
|
break;
|
|
case FF_SAW_UP:
|
|
type_id = PID_SAW_UP;
|
|
break;
|
|
case FF_SAW_DOWN:
|
|
type_id = PID_SAW_DOWN;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR
|
|
"hid-pidff: invalid waveform\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[type_id]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_periodic(effect, old))
|
|
pidff_set_periodic_report(pidff, effect);
|
|
if (!old ||
|
|
pidff_needs_set_envelope(&effect->u.periodic.envelope,
|
|
&old->u.periodic.envelope))
|
|
pidff_set_envelope_report(pidff,
|
|
&effect->u.periodic.envelope);
|
|
break;
|
|
|
|
case FF_RAMP:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_RAMP]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_ramp(effect, old))
|
|
pidff_set_ramp_force_report(pidff, effect);
|
|
if (!old ||
|
|
pidff_needs_set_envelope(&effect->u.ramp.envelope,
|
|
&old->u.ramp.envelope))
|
|
pidff_set_envelope_report(pidff,
|
|
&effect->u.ramp.envelope);
|
|
break;
|
|
|
|
case FF_SPRING:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_SPRING]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_condition(effect, old))
|
|
pidff_set_condition_report(pidff, effect);
|
|
break;
|
|
|
|
case FF_FRICTION:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_FRICTION]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_condition(effect, old))
|
|
pidff_set_condition_report(pidff, effect);
|
|
break;
|
|
|
|
case FF_DAMPER:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_DAMPER]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_condition(effect, old))
|
|
pidff_set_condition_report(pidff, effect);
|
|
break;
|
|
|
|
case FF_INERTIA:
|
|
if (!old) {
|
|
error = pidff_request_effect_upload(pidff,
|
|
pidff->type_id[PID_INERTIA]);
|
|
if (error)
|
|
return error;
|
|
}
|
|
if (!old || pidff_needs_set_effect(effect, old))
|
|
pidff_set_effect_report(pidff, effect);
|
|
if (!old || pidff_needs_set_condition(effect, old))
|
|
pidff_set_condition_report(pidff, effect);
|
|
break;
|
|
|
|
default:
|
|
printk(KERN_ERR "hid-pidff: invalid type\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!old)
|
|
pidff->pid_id[effect->id] =
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0];
|
|
|
|
debug("uploaded");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* set_gain() handler
|
|
*/
|
|
static void pidff_set_gain(struct input_dev *dev, u16 gain)
|
|
{
|
|
struct pidff_device *pidff = dev->ff->private;
|
|
|
|
pidff_set(&pidff->device_gain[PID_DEVICE_GAIN_FIELD], gain);
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_DEVICE_GAIN],
|
|
USB_DIR_OUT);
|
|
}
|
|
|
|
static void pidff_autocenter(struct pidff_device *pidff, u16 magnitude)
|
|
{
|
|
struct hid_field *field =
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].field;
|
|
|
|
if (!magnitude) {
|
|
pidff_playback_pid(pidff, field->logical_minimum, 0);
|
|
return;
|
|
}
|
|
|
|
pidff_playback_pid(pidff, field->logical_minimum, 1);
|
|
|
|
pidff->set_effect[PID_EFFECT_BLOCK_INDEX].value[0] =
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum;
|
|
pidff->set_effect_type->value[0] = pidff->type_id[PID_SPRING];
|
|
pidff->set_effect[PID_DURATION].value[0] = 0;
|
|
pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = 0;
|
|
pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] = 0;
|
|
pidff_set(&pidff->set_effect[PID_GAIN], magnitude);
|
|
pidff->set_effect[PID_DIRECTION_ENABLE].value[0] = 1;
|
|
pidff->set_effect[PID_START_DELAY].value[0] = 0;
|
|
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_SET_EFFECT],
|
|
USB_DIR_OUT);
|
|
}
|
|
|
|
/*
|
|
* pidff_set_autocenter() handler
|
|
*/
|
|
static void pidff_set_autocenter(struct input_dev *dev, u16 magnitude)
|
|
{
|
|
struct pidff_device *pidff = dev->ff->private;
|
|
|
|
pidff_autocenter(pidff, magnitude);
|
|
}
|
|
|
|
/*
|
|
* Find fields from a report and fill a pidff_usage
|
|
*/
|
|
static int pidff_find_fields(struct pidff_usage *usage, const u8 *table,
|
|
struct hid_report *report, int count, int strict)
|
|
{
|
|
int i, j, k, found;
|
|
|
|
for (k = 0; k < count; k++) {
|
|
found = 0;
|
|
for (i = 0; i < report->maxfield; i++) {
|
|
if (report->field[i]->maxusage !=
|
|
report->field[i]->report_count) {
|
|
debug("maxusage and report_count do not match, "
|
|
"skipping");
|
|
continue;
|
|
}
|
|
for (j = 0; j < report->field[i]->maxusage; j++) {
|
|
if (report->field[i]->usage[j].hid ==
|
|
(HID_UP_PID | table[k])) {
|
|
debug("found %d at %d->%d", k, i, j);
|
|
usage[k].field = report->field[i];
|
|
usage[k].value =
|
|
&report->field[i]->value[j];
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
if (!found && strict) {
|
|
debug("failed to locate %d", k);
|
|
return -1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Return index into pidff_reports for the given usage
|
|
*/
|
|
static int pidff_check_usage(int usage)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(pidff_reports); i++)
|
|
if (usage == (HID_UP_PID | pidff_reports[i]))
|
|
return i;
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Find the reports and fill pidff->reports[]
|
|
* report_type specifies either OUTPUT or FEATURE reports
|
|
*/
|
|
static void pidff_find_reports(struct hid_device *hid, int report_type,
|
|
struct pidff_device *pidff)
|
|
{
|
|
struct hid_report *report;
|
|
int i, ret;
|
|
|
|
list_for_each_entry(report,
|
|
&hid->report_enum[report_type].report_list, list) {
|
|
if (report->maxfield < 1)
|
|
continue;
|
|
ret = pidff_check_usage(report->field[0]->logical);
|
|
if (ret != -1) {
|
|
debug("found usage 0x%02x from field->logical",
|
|
pidff_reports[ret]);
|
|
pidff->reports[ret] = report;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Sometimes logical collections are stacked to indicate
|
|
* different usages for the report and the field, in which
|
|
* case we want the usage of the parent. However, Linux HID
|
|
* implementation hides this fact, so we have to dig it up
|
|
* ourselves
|
|
*/
|
|
i = report->field[0]->usage[0].collection_index;
|
|
if (i <= 0 ||
|
|
hid->collection[i - 1].type != HID_COLLECTION_LOGICAL)
|
|
continue;
|
|
ret = pidff_check_usage(hid->collection[i - 1].usage);
|
|
if (ret != -1 && !pidff->reports[ret]) {
|
|
debug("found usage 0x%02x from collection array",
|
|
pidff_reports[ret]);
|
|
pidff->reports[ret] = report;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Test if the required reports have been found
|
|
*/
|
|
static int pidff_reports_ok(struct pidff_device *pidff)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i <= PID_REQUIRED_REPORTS; i++) {
|
|
if (!pidff->reports[i]) {
|
|
debug("%d missing", i);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* Find a field with a specific usage within a report
|
|
*/
|
|
static struct hid_field *pidff_find_special_field(struct hid_report *report,
|
|
int usage, int enforce_min)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < report->maxfield; i++) {
|
|
if (report->field[i]->logical == (HID_UP_PID | usage) &&
|
|
report->field[i]->report_count > 0) {
|
|
if (!enforce_min ||
|
|
report->field[i]->logical_minimum == 1)
|
|
return report->field[i];
|
|
else {
|
|
printk(KERN_ERR "hid-pidff: logical_minimum "
|
|
"is not 1 as it should be\n");
|
|
return NULL;
|
|
}
|
|
}
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
/*
|
|
* Fill a pidff->*_id struct table
|
|
*/
|
|
static int pidff_find_special_keys(int *keys, struct hid_field *fld,
|
|
const u8 *usagetable, int count)
|
|
{
|
|
|
|
int i, j;
|
|
int found = 0;
|
|
|
|
for (i = 0; i < count; i++) {
|
|
for (j = 0; j < fld->maxusage; j++) {
|
|
if (fld->usage[j].hid == (HID_UP_PID | usagetable[i])) {
|
|
keys[i] = j + 1;
|
|
found++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return found;
|
|
}
|
|
|
|
#define PIDFF_FIND_SPECIAL_KEYS(keys, field, name) \
|
|
pidff_find_special_keys(pidff->keys, pidff->field, pidff_ ## name, \
|
|
sizeof(pidff_ ## name))
|
|
|
|
/*
|
|
* Find and check the special fields
|
|
*/
|
|
static int pidff_find_special_fields(struct pidff_device *pidff)
|
|
{
|
|
debug("finding special fields");
|
|
|
|
pidff->create_new_effect_type =
|
|
pidff_find_special_field(pidff->reports[PID_CREATE_NEW_EFFECT],
|
|
0x25, 1);
|
|
pidff->set_effect_type =
|
|
pidff_find_special_field(pidff->reports[PID_SET_EFFECT],
|
|
0x25, 1);
|
|
pidff->effect_direction =
|
|
pidff_find_special_field(pidff->reports[PID_SET_EFFECT],
|
|
0x57, 0);
|
|
pidff->device_control =
|
|
pidff_find_special_field(pidff->reports[PID_DEVICE_CONTROL],
|
|
0x96, 1);
|
|
pidff->block_load_status =
|
|
pidff_find_special_field(pidff->reports[PID_BLOCK_LOAD],
|
|
0x8b, 1);
|
|
pidff->effect_operation_status =
|
|
pidff_find_special_field(pidff->reports[PID_EFFECT_OPERATION],
|
|
0x78, 1);
|
|
|
|
debug("search done");
|
|
|
|
if (!pidff->create_new_effect_type || !pidff->set_effect_type) {
|
|
printk(KERN_ERR "hid-pidff: effect lists not found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!pidff->effect_direction) {
|
|
printk(KERN_ERR "hid-pidff: direction field not found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!pidff->device_control) {
|
|
printk(KERN_ERR "hid-pidff: device control field not found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!pidff->block_load_status) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: block load status field not found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (!pidff->effect_operation_status) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: effect operation field not found\n");
|
|
return -1;
|
|
}
|
|
|
|
pidff_find_special_keys(pidff->control_id, pidff->device_control,
|
|
pidff_device_control,
|
|
sizeof(pidff_device_control));
|
|
|
|
PIDFF_FIND_SPECIAL_KEYS(control_id, device_control, device_control);
|
|
|
|
if (!PIDFF_FIND_SPECIAL_KEYS(type_id, create_new_effect_type,
|
|
effect_types)) {
|
|
printk(KERN_ERR "hid-pidff: no effect types found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (PIDFF_FIND_SPECIAL_KEYS(status_id, block_load_status,
|
|
block_load_status) !=
|
|
sizeof(pidff_block_load_status)) {
|
|
printk(KERN_ERR
|
|
"hidpidff: block load status identifiers not found\n");
|
|
return -1;
|
|
}
|
|
|
|
if (PIDFF_FIND_SPECIAL_KEYS(operation_id, effect_operation_status,
|
|
effect_operation_status) !=
|
|
sizeof(pidff_effect_operation_status)) {
|
|
printk(KERN_ERR
|
|
"hidpidff: effect operation identifiers not found\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Find the implemented effect types
|
|
*/
|
|
static int pidff_find_effects(struct pidff_device *pidff,
|
|
struct input_dev *dev)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sizeof(pidff_effect_types); i++) {
|
|
int pidff_type = pidff->type_id[i];
|
|
if (pidff->set_effect_type->usage[pidff_type].hid !=
|
|
pidff->create_new_effect_type->usage[pidff_type].hid) {
|
|
printk(KERN_ERR "hid-pidff: "
|
|
"effect type number %d is invalid\n", i);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (pidff->type_id[PID_CONSTANT])
|
|
set_bit(FF_CONSTANT, dev->ffbit);
|
|
if (pidff->type_id[PID_RAMP])
|
|
set_bit(FF_RAMP, dev->ffbit);
|
|
if (pidff->type_id[PID_SQUARE]) {
|
|
set_bit(FF_SQUARE, dev->ffbit);
|
|
set_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
if (pidff->type_id[PID_SINE]) {
|
|
set_bit(FF_SINE, dev->ffbit);
|
|
set_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
if (pidff->type_id[PID_TRIANGLE]) {
|
|
set_bit(FF_TRIANGLE, dev->ffbit);
|
|
set_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
if (pidff->type_id[PID_SAW_UP]) {
|
|
set_bit(FF_SAW_UP, dev->ffbit);
|
|
set_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
if (pidff->type_id[PID_SAW_DOWN]) {
|
|
set_bit(FF_SAW_DOWN, dev->ffbit);
|
|
set_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
if (pidff->type_id[PID_SPRING])
|
|
set_bit(FF_SPRING, dev->ffbit);
|
|
if (pidff->type_id[PID_DAMPER])
|
|
set_bit(FF_DAMPER, dev->ffbit);
|
|
if (pidff->type_id[PID_INERTIA])
|
|
set_bit(FF_INERTIA, dev->ffbit);
|
|
if (pidff->type_id[PID_FRICTION])
|
|
set_bit(FF_FRICTION, dev->ffbit);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
#define PIDFF_FIND_FIELDS(name, report, strict) \
|
|
pidff_find_fields(pidff->name, pidff_ ## name, \
|
|
pidff->reports[report], \
|
|
sizeof(pidff_ ## name), strict)
|
|
|
|
/*
|
|
* Fill and check the pidff_usages
|
|
*/
|
|
static int pidff_init_fields(struct pidff_device *pidff, struct input_dev *dev)
|
|
{
|
|
int envelope_ok = 0;
|
|
|
|
if (PIDFF_FIND_FIELDS(set_effect, PID_SET_EFFECT, 1)) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: unknown set_effect report layout\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
PIDFF_FIND_FIELDS(block_load, PID_BLOCK_LOAD, 0);
|
|
if (!pidff->block_load[PID_EFFECT_BLOCK_INDEX].value) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: unknown pid_block_load report layout\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (PIDFF_FIND_FIELDS(effect_operation, PID_EFFECT_OPERATION, 1)) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: unknown effect_operation report layout\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (PIDFF_FIND_FIELDS(block_free, PID_BLOCK_FREE, 1)) {
|
|
printk(KERN_ERR
|
|
"hid-pidff: unknown pid_block_free report layout\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!PIDFF_FIND_FIELDS(set_envelope, PID_SET_ENVELOPE, 1))
|
|
envelope_ok = 1;
|
|
|
|
if (pidff_find_special_fields(pidff) || pidff_find_effects(pidff, dev))
|
|
return -ENODEV;
|
|
|
|
if (!envelope_ok) {
|
|
if (test_and_clear_bit(FF_CONSTANT, dev->ffbit))
|
|
printk(KERN_WARNING "hid-pidff: "
|
|
"has constant effect but no envelope\n");
|
|
if (test_and_clear_bit(FF_RAMP, dev->ffbit))
|
|
printk(KERN_WARNING "hid-pidff: "
|
|
"has ramp effect but no envelope\n");
|
|
|
|
if (test_and_clear_bit(FF_PERIODIC, dev->ffbit))
|
|
printk(KERN_WARNING "hid-pidff: "
|
|
"has periodic effect but no envelope\n");
|
|
}
|
|
|
|
if (test_bit(FF_CONSTANT, dev->ffbit) &&
|
|
PIDFF_FIND_FIELDS(set_constant, PID_SET_CONSTANT, 1)) {
|
|
printk(KERN_WARNING
|
|
"hid-pidff: unknown constant effect layout\n");
|
|
clear_bit(FF_CONSTANT, dev->ffbit);
|
|
}
|
|
|
|
if (test_bit(FF_RAMP, dev->ffbit) &&
|
|
PIDFF_FIND_FIELDS(set_ramp, PID_SET_RAMP, 1)) {
|
|
printk(KERN_WARNING "hid-pidff: unknown ramp effect layout\n");
|
|
clear_bit(FF_RAMP, dev->ffbit);
|
|
}
|
|
|
|
if ((test_bit(FF_SPRING, dev->ffbit) ||
|
|
test_bit(FF_DAMPER, dev->ffbit) ||
|
|
test_bit(FF_FRICTION, dev->ffbit) ||
|
|
test_bit(FF_INERTIA, dev->ffbit)) &&
|
|
PIDFF_FIND_FIELDS(set_condition, PID_SET_CONDITION, 1)) {
|
|
printk(KERN_WARNING
|
|
"hid-pidff: unknown condition effect layout\n");
|
|
clear_bit(FF_SPRING, dev->ffbit);
|
|
clear_bit(FF_DAMPER, dev->ffbit);
|
|
clear_bit(FF_FRICTION, dev->ffbit);
|
|
clear_bit(FF_INERTIA, dev->ffbit);
|
|
}
|
|
|
|
if (test_bit(FF_PERIODIC, dev->ffbit) &&
|
|
PIDFF_FIND_FIELDS(set_periodic, PID_SET_PERIODIC, 1)) {
|
|
printk(KERN_WARNING
|
|
"hid-pidff: unknown periodic effect layout\n");
|
|
clear_bit(FF_PERIODIC, dev->ffbit);
|
|
}
|
|
|
|
PIDFF_FIND_FIELDS(pool, PID_POOL, 0);
|
|
|
|
if (!PIDFF_FIND_FIELDS(device_gain, PID_DEVICE_GAIN, 1))
|
|
set_bit(FF_GAIN, dev->ffbit);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Reset the device
|
|
*/
|
|
static void pidff_reset(struct pidff_device *pidff)
|
|
{
|
|
struct hid_device *hid = pidff->hid;
|
|
int i = 0;
|
|
|
|
pidff->device_control->value[0] = pidff->control_id[PID_RESET];
|
|
/* We reset twice as sometimes hid_wait_io isn't waiting long enough */
|
|
usbhid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT);
|
|
usbhid_wait_io(hid);
|
|
usbhid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT);
|
|
usbhid_wait_io(hid);
|
|
|
|
pidff->device_control->value[0] =
|
|
pidff->control_id[PID_ENABLE_ACTUATORS];
|
|
usbhid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT);
|
|
usbhid_wait_io(hid);
|
|
|
|
/* pool report is sometimes messed up, refetch it */
|
|
usbhid_submit_report(hid, pidff->reports[PID_POOL], USB_DIR_IN);
|
|
usbhid_wait_io(hid);
|
|
|
|
if (pidff->pool[PID_SIMULTANEOUS_MAX].value) {
|
|
while (pidff->pool[PID_SIMULTANEOUS_MAX].value[0] < 2) {
|
|
if (i++ > 20) {
|
|
printk(KERN_WARNING "hid-pidff: device reports "
|
|
"%d simultaneous effects\n",
|
|
pidff->pool[PID_SIMULTANEOUS_MAX].value[0]);
|
|
break;
|
|
}
|
|
debug("pid_pool requested again");
|
|
usbhid_submit_report(hid, pidff->reports[PID_POOL],
|
|
USB_DIR_IN);
|
|
usbhid_wait_io(hid);
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Test if autocenter modification is using the supported method
|
|
*/
|
|
static int pidff_check_autocenter(struct pidff_device *pidff,
|
|
struct input_dev *dev)
|
|
{
|
|
int error;
|
|
|
|
/*
|
|
* Let's find out if autocenter modification is supported
|
|
* Specification doesn't specify anything, so we request an
|
|
* effect upload and cancel it immediately. If the approved
|
|
* effect id was one above the minimum, then we assume the first
|
|
* effect id is a built-in spring type effect used for autocenter
|
|
*/
|
|
|
|
error = pidff_request_effect_upload(pidff, 1);
|
|
if (error) {
|
|
printk(KERN_ERR "hid-pidff: upload request failed\n");
|
|
return error;
|
|
}
|
|
|
|
if (pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] ==
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum + 1) {
|
|
pidff_autocenter(pidff, 0xffff);
|
|
set_bit(FF_AUTOCENTER, dev->ffbit);
|
|
} else {
|
|
printk(KERN_NOTICE "hid-pidff: "
|
|
"device has unknown autocenter control method\n");
|
|
}
|
|
|
|
pidff_erase_pid(pidff,
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
/*
|
|
* Check if the device is PID and initialize it
|
|
*/
|
|
int hid_pidff_init(struct hid_device *hid)
|
|
{
|
|
struct pidff_device *pidff;
|
|
struct hid_input *hidinput = list_entry(hid->inputs.next,
|
|
struct hid_input, list);
|
|
struct input_dev *dev = hidinput->input;
|
|
struct ff_device *ff;
|
|
int max_effects;
|
|
int error;
|
|
|
|
debug("starting pid init");
|
|
|
|
if (list_empty(&hid->report_enum[HID_OUTPUT_REPORT].report_list)) {
|
|
debug("not a PID device, no output report");
|
|
return -ENODEV;
|
|
}
|
|
|
|
pidff = kzalloc(sizeof(*pidff), GFP_KERNEL);
|
|
if (!pidff)
|
|
return -ENOMEM;
|
|
|
|
pidff->hid = hid;
|
|
|
|
pidff_find_reports(hid, HID_OUTPUT_REPORT, pidff);
|
|
pidff_find_reports(hid, HID_FEATURE_REPORT, pidff);
|
|
|
|
if (!pidff_reports_ok(pidff)) {
|
|
debug("reports not ok, aborting");
|
|
error = -ENODEV;
|
|
goto fail;
|
|
}
|
|
|
|
error = pidff_init_fields(pidff, dev);
|
|
if (error)
|
|
goto fail;
|
|
|
|
pidff_reset(pidff);
|
|
|
|
if (test_bit(FF_GAIN, dev->ffbit)) {
|
|
pidff_set(&pidff->device_gain[PID_DEVICE_GAIN_FIELD], 0xffff);
|
|
usbhid_submit_report(pidff->hid, pidff->reports[PID_DEVICE_GAIN],
|
|
USB_DIR_OUT);
|
|
}
|
|
|
|
error = pidff_check_autocenter(pidff, dev);
|
|
if (error)
|
|
goto fail;
|
|
|
|
max_effects =
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_maximum -
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum +
|
|
1;
|
|
debug("max effects is %d", max_effects);
|
|
|
|
if (max_effects > PID_EFFECTS_MAX)
|
|
max_effects = PID_EFFECTS_MAX;
|
|
|
|
if (pidff->pool[PID_SIMULTANEOUS_MAX].value)
|
|
debug("max simultaneous effects is %d",
|
|
pidff->pool[PID_SIMULTANEOUS_MAX].value[0]);
|
|
|
|
if (pidff->pool[PID_RAM_POOL_SIZE].value)
|
|
debug("device memory size is %d bytes",
|
|
pidff->pool[PID_RAM_POOL_SIZE].value[0]);
|
|
|
|
if (pidff->pool[PID_DEVICE_MANAGED_POOL].value &&
|
|
pidff->pool[PID_DEVICE_MANAGED_POOL].value[0] == 0) {
|
|
printk(KERN_NOTICE "hid-pidff: "
|
|
"device does not support device managed pool\n");
|
|
goto fail;
|
|
}
|
|
|
|
error = input_ff_create(dev, max_effects);
|
|
if (error)
|
|
goto fail;
|
|
|
|
ff = dev->ff;
|
|
ff->private = pidff;
|
|
ff->upload = pidff_upload_effect;
|
|
ff->erase = pidff_erase_effect;
|
|
ff->set_gain = pidff_set_gain;
|
|
ff->set_autocenter = pidff_set_autocenter;
|
|
ff->playback = pidff_playback;
|
|
|
|
printk(KERN_INFO "Force feedback for USB HID PID devices by "
|
|
"Anssi Hannula <anssi.hannula@gmail.com>\n");
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(pidff);
|
|
return error;
|
|
}
|