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1324 lines
36 KiB
1324 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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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 <[email protected]> |
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*/ |
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/* |
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*/ |
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|
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/* #define DEBUG */ |
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
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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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pr_debug("calculated from %d to %d\n", 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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pr_debug("calculated from %d to %d\n", 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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hid_dbg(pidff->hid, "attack %u => %d\n", |
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envelope->attack_level, |
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pidff->set_envelope[PID_ATTACK_LEVEL].value[0]); |
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hid_hw_request(pidff->hid, pidff->reports[PID_SET_ENVELOPE], |
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HID_REQ_SET_REPORT); |
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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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hid_hw_request(pidff->hid, pidff->reports[PID_SET_CONSTANT], |
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HID_REQ_SET_REPORT); |
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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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hid_hw_request(pidff->hid, pidff->reports[PID_SET_EFFECT], |
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HID_REQ_SET_REPORT); |
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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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hid_hw_request(pidff->hid, pidff->reports[PID_SET_PERIODIC], |
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HID_REQ_SET_REPORT); |
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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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hid_hw_request(pidff->hid, pidff->reports[PID_SET_CONDITION], |
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HID_REQ_SET_REPORT); |
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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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hid_hw_request(pidff->hid, pidff->reports[PID_SET_RAMP], |
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HID_REQ_SET_REPORT); |
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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) |
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{ |
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int j; |
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|
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pidff->create_new_effect_type->value[0] = efnum; |
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hid_hw_request(pidff->hid, pidff->reports[PID_CREATE_NEW_EFFECT], |
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HID_REQ_SET_REPORT); |
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hid_dbg(pidff->hid, "create_new_effect sent, type: %d\n", efnum); |
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pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0; |
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pidff->block_load_status->value[0] = 0; |
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hid_hw_wait(pidff->hid); |
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for (j = 0; j < 60; j++) { |
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hid_dbg(pidff->hid, "pid_block_load requested\n"); |
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hid_hw_request(pidff->hid, pidff->reports[PID_BLOCK_LOAD], |
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HID_REQ_GET_REPORT); |
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hid_hw_wait(pidff->hid); |
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if (pidff->block_load_status->value[0] == |
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pidff->status_id[PID_BLOCK_LOAD_SUCCESS]) { |
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hid_dbg(pidff->hid, "device reported free memory: %d bytes\n", |
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pidff->block_load[PID_RAM_POOL_AVAILABLE].value ? |
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pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1); |
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return 0; |
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} |
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if (pidff->block_load_status->value[0] == |
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pidff->status_id[PID_BLOCK_LOAD_FULL]) { |
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hid_dbg(pidff->hid, "not enough memory free: %d bytes\n", |
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pidff->block_load[PID_RAM_POOL_AVAILABLE].value ? |
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pidff->block_load[PID_RAM_POOL_AVAILABLE].value[0] : -1); |
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return -ENOSPC; |
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} |
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} |
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hid_err(pidff->hid, "pid_block_load failed 60 times\n"); |
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return -EIO; |
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} |
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|
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/* |
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* Play the effect with PID id n times |
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*/ |
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static void pidff_playback_pid(struct pidff_device *pidff, int pid_id, int n) |
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{ |
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pidff->effect_operation[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id; |
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|
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if (n == 0) { |
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pidff->effect_operation_status->value[0] = |
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pidff->operation_id[PID_EFFECT_STOP]; |
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} else { |
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pidff->effect_operation_status->value[0] = |
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pidff->operation_id[PID_EFFECT_START]; |
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pidff->effect_operation[PID_LOOP_COUNT].value[0] = n; |
|
} |
|
|
|
hid_hw_request(pidff->hid, pidff->reports[PID_EFFECT_OPERATION], |
|
HID_REQ_SET_REPORT); |
|
} |
|
|
|
/** |
|
* 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; |
|
hid_hw_request(pidff->hid, pidff->reports[PID_BLOCK_FREE], |
|
HID_REQ_SET_REPORT); |
|
} |
|
|
|
/* |
|
* 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]; |
|
|
|
hid_dbg(pidff->hid, "starting to erase %d/%d\n", |
|
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. */ |
|
hid_hw_wait(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; |
|
|
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = 0; |
|
if (old) { |
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] = |
|
pidff->pid_id[effect->id]; |
|
} |
|
|
|
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: |
|
hid_err(pidff->hid, "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: |
|
hid_err(pidff->hid, "invalid type\n"); |
|
return -EINVAL; |
|
} |
|
|
|
if (!old) |
|
pidff->pid_id[effect->id] = |
|
pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; |
|
|
|
hid_dbg(pidff->hid, "uploaded\n"); |
|
|
|
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); |
|
hid_hw_request(pidff->hid, pidff->reports[PID_DEVICE_GAIN], |
|
HID_REQ_SET_REPORT); |
|
} |
|
|
|
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; |
|
|
|
hid_hw_request(pidff->hid, pidff->reports[PID_SET_EFFECT], |
|
HID_REQ_SET_REPORT); |
|
} |
|
|
|
/* |
|
* 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) { |
|
pr_debug("maxusage and report_count do not match, skipping\n"); |
|
continue; |
|
} |
|
for (j = 0; j < report->field[i]->maxusage; j++) { |
|
if (report->field[i]->usage[j].hid == |
|
(HID_UP_PID | table[k])) { |
|
pr_debug("found %d at %d->%d\n", |
|
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) { |
|
pr_debug("failed to locate %d\n", 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) { |
|
hid_dbg(hid, "found usage 0x%02x from field->logical\n", |
|
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]) { |
|
hid_dbg(hid, |
|
"found usage 0x%02x from collection array\n", |
|
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]) { |
|
hid_dbg(pidff->hid, "%d missing\n", 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 { |
|
pr_err("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) |
|
{ |
|
hid_dbg(pidff->hid, "finding special fields\n"); |
|
|
|
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); |
|
|
|
hid_dbg(pidff->hid, "search done\n"); |
|
|
|
if (!pidff->create_new_effect_type || !pidff->set_effect_type) { |
|
hid_err(pidff->hid, "effect lists not found\n"); |
|
return -1; |
|
} |
|
|
|
if (!pidff->effect_direction) { |
|
hid_err(pidff->hid, "direction field not found\n"); |
|
return -1; |
|
} |
|
|
|
if (!pidff->device_control) { |
|
hid_err(pidff->hid, "device control field not found\n"); |
|
return -1; |
|
} |
|
|
|
if (!pidff->block_load_status) { |
|
hid_err(pidff->hid, "block load status field not found\n"); |
|
return -1; |
|
} |
|
|
|
if (!pidff->effect_operation_status) { |
|
hid_err(pidff->hid, "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)) { |
|
hid_err(pidff->hid, "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)) { |
|
hid_err(pidff->hid, |
|
"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)) { |
|
hid_err(pidff->hid, "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) { |
|
hid_err(pidff->hid, |
|
"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)) { |
|
hid_err(pidff->hid, "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) { |
|
hid_err(pidff->hid, "unknown pid_block_load report layout\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (PIDFF_FIND_FIELDS(effect_operation, PID_EFFECT_OPERATION, 1)) { |
|
hid_err(pidff->hid, "unknown effect_operation report layout\n"); |
|
return -ENODEV; |
|
} |
|
|
|
if (PIDFF_FIND_FIELDS(block_free, PID_BLOCK_FREE, 1)) { |
|
hid_err(pidff->hid, "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)) |
|
hid_warn(pidff->hid, |
|
"has constant effect but no envelope\n"); |
|
if (test_and_clear_bit(FF_RAMP, dev->ffbit)) |
|
hid_warn(pidff->hid, |
|
"has ramp effect but no envelope\n"); |
|
|
|
if (test_and_clear_bit(FF_PERIODIC, dev->ffbit)) |
|
hid_warn(pidff->hid, |
|
"has periodic effect but no envelope\n"); |
|
} |
|
|
|
if (test_bit(FF_CONSTANT, dev->ffbit) && |
|
PIDFF_FIND_FIELDS(set_constant, PID_SET_CONSTANT, 1)) { |
|
hid_warn(pidff->hid, "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)) { |
|
hid_warn(pidff->hid, "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)) { |
|
hid_warn(pidff->hid, "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)) { |
|
hid_warn(pidff->hid, "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 */ |
|
hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT); |
|
hid_hw_wait(hid); |
|
hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT); |
|
hid_hw_wait(hid); |
|
|
|
pidff->device_control->value[0] = |
|
pidff->control_id[PID_ENABLE_ACTUATORS]; |
|
hid_hw_request(hid, pidff->reports[PID_DEVICE_CONTROL], HID_REQ_SET_REPORT); |
|
hid_hw_wait(hid); |
|
|
|
/* pool report is sometimes messed up, refetch it */ |
|
hid_hw_request(hid, pidff->reports[PID_POOL], HID_REQ_GET_REPORT); |
|
hid_hw_wait(hid); |
|
|
|
if (pidff->pool[PID_SIMULTANEOUS_MAX].value) { |
|
while (pidff->pool[PID_SIMULTANEOUS_MAX].value[0] < 2) { |
|
if (i++ > 20) { |
|
hid_warn(pidff->hid, |
|
"device reports %d simultaneous effects\n", |
|
pidff->pool[PID_SIMULTANEOUS_MAX].value[0]); |
|
break; |
|
} |
|
hid_dbg(pidff->hid, "pid_pool requested again\n"); |
|
hid_hw_request(hid, pidff->reports[PID_POOL], |
|
HID_REQ_GET_REPORT); |
|
hid_hw_wait(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) { |
|
hid_err(pidff->hid, "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 { |
|
hid_notice(pidff->hid, |
|
"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; |
|
|
|
hid_dbg(hid, "starting pid init\n"); |
|
|
|
if (list_empty(&hid->report_enum[HID_OUTPUT_REPORT].report_list)) { |
|
hid_dbg(hid, "not a PID device, no output report\n"); |
|
return -ENODEV; |
|
} |
|
|
|
pidff = kzalloc(sizeof(*pidff), GFP_KERNEL); |
|
if (!pidff) |
|
return -ENOMEM; |
|
|
|
pidff->hid = hid; |
|
|
|
hid_device_io_start(hid); |
|
|
|
pidff_find_reports(hid, HID_OUTPUT_REPORT, pidff); |
|
pidff_find_reports(hid, HID_FEATURE_REPORT, pidff); |
|
|
|
if (!pidff_reports_ok(pidff)) { |
|
hid_dbg(hid, "reports not ok, aborting\n"); |
|
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); |
|
hid_hw_request(hid, pidff->reports[PID_DEVICE_GAIN], |
|
HID_REQ_SET_REPORT); |
|
} |
|
|
|
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; |
|
hid_dbg(hid, "max effects is %d\n", max_effects); |
|
|
|
if (max_effects > PID_EFFECTS_MAX) |
|
max_effects = PID_EFFECTS_MAX; |
|
|
|
if (pidff->pool[PID_SIMULTANEOUS_MAX].value) |
|
hid_dbg(hid, "max simultaneous effects is %d\n", |
|
pidff->pool[PID_SIMULTANEOUS_MAX].value[0]); |
|
|
|
if (pidff->pool[PID_RAM_POOL_SIZE].value) |
|
hid_dbg(hid, "device memory size is %d bytes\n", |
|
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) { |
|
error = -EPERM; |
|
hid_notice(hid, |
|
"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; |
|
|
|
hid_info(dev, "Force feedback for USB HID PID devices by Anssi Hannula <[email protected]>\n"); |
|
|
|
hid_device_io_stop(hid); |
|
|
|
return 0; |
|
|
|
fail: |
|
hid_device_io_stop(hid); |
|
|
|
kfree(pidff); |
|
return error; |
|
}
|
|
|