Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751070AbWEZQaF (ORCPT ); Fri, 26 May 2006 12:30:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751063AbWEZQ3x (ORCPT ); Fri, 26 May 2006 12:29:53 -0400 Received: from pne-smtpout3-sn2.hy.skanova.net ([81.228.8.111]:55547 "EHLO pne-smtpout3-sn2.hy.skanova.net") by vger.kernel.org with ESMTP id S1751074AbWEZQ3s (ORCPT ); Fri, 26 May 2006 12:29:48 -0400 Message-Id: <20060526162906.939200000@gmail.com> References: <20060526161129.557416000@gmail.com> User-Agent: quilt/0.44-1 Date: Fri, 26 May 2006 19:11:37 +0300 From: Anssi Hannula To: Dmitry Torokhov Cc: linux-joystick@atrey.karlin.mff.cuni.cz, linux-kernel@vger.kernel.org Subject: [patch 08/13] input: force feedback driver for PID devices Content-Disposition: inline; filename=ff-refactoring-new-driver-pidff.diff Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 47921 Lines: 1553 Add force feedback driver for PID devices. This replaces the older PID driver which was never completed. Signed-off-by: Anssi Hannula --- drivers/usb/input/Kconfig | 4 drivers/usb/input/Makefile | 2 drivers/usb/input/hid-ff.c | 14 drivers/usb/input/hid-input.c | 21 drivers/usb/input/hid-pidff.c | 1400 ++++++++++++++++++++++++++++++++++++++++++ drivers/usb/input/hid.h | 6 6 files changed, 1416 insertions(+), 31 deletions(-) Index: linux-2.6.17-rc4-git12/drivers/usb/input/hid-ff.c =================================================================== --- linux-2.6.17-rc4-git12.orig/drivers/usb/input/hid-ff.c 2006-05-25 12:12:10.000000000 +0300 +++ linux-2.6.17-rc4-git12/drivers/usb/input/hid-ff.c 2006-05-26 16:50:38.000000000 +0300 @@ -51,9 +51,6 @@ static struct hid_ff_initializer inits[] {0x46d, 0xc295, hid_lgff_init}, // Logitech MOMO force wheel {0x46d, 0xc219, hid_lgff_init}, // Logitech Cordless rumble pad 2 #endif -#ifdef CONFIG_HID_PID - {0x45e, 0x001b, hid_pid_init}, -#endif #ifdef CONFIG_THRUSTMASTER_FF {0x44f, 0xb304, hid_tmff_init}, #endif @@ -80,9 +77,12 @@ int hid_ff_init(struct hid_device* hid) init = hid_get_ff_init(le16_to_cpu(hid->dev->descriptor.idVendor), le16_to_cpu(hid->dev->descriptor.idProduct)); - if (!init) { - dbg("hid_ff_init could not find initializer"); - return -ENOSYS; - } + /* We try pidff when no other driver is found because PID is the + standards compliant way of implementing force feedback in HID. + pidff_init() will quickly abort if the device doesn't appear to + be a PID device */ + if (!init) + return pidff_init(hid); + return init->init(hid); } Index: linux-2.6.17-rc4-git12/drivers/usb/input/hid.h =================================================================== --- linux-2.6.17-rc4-git12.orig/drivers/usb/input/hid.h 2006-05-25 17:07:51.000000000 +0300 +++ linux-2.6.17-rc4-git12/drivers/usb/input/hid.h 2006-05-26 16:50:38.000000000 +0300 @@ -527,5 +527,9 @@ static inline void hid_ff_exit(struct hi int hid_lgff_init(struct hid_device* hid); int hid_tmff_init(struct hid_device* hid); -int hid_pid_init(struct hid_device* hid); +#ifdef CONFIG_HID_PID +int pidff_init(struct hid_device *hid); +#else +static inline int pidff_init(struct hid_device *hid) { return -1; } +#endif Index: linux-2.6.17-rc4-git12/drivers/usb/input/hid-input.c =================================================================== --- linux-2.6.17-rc4-git12.orig/drivers/usb/input/hid-input.c 2006-05-25 17:07:51.000000000 +0300 +++ linux-2.6.17-rc4-git12/drivers/usb/input/hid-input.c 2006-05-25 17:08:17.000000000 +0300 @@ -67,11 +67,9 @@ static const struct { #define map_rel(c) do { usage->code = c; usage->type = EV_REL; bit = input->relbit; max = REL_MAX; } while (0) #define map_key(c) do { usage->code = c; usage->type = EV_KEY; bit = input->keybit; max = KEY_MAX; } while (0) #define map_led(c) do { usage->code = c; usage->type = EV_LED; bit = input->ledbit; max = LED_MAX; } while (0) -#define map_ff(c) do { usage->code = c; usage->type = EV_FF; bit = input->ffbit; max = FF_MAX; } while (0) #define map_abs_clear(c) do { map_abs(c); clear_bit(c, bit); } while (0) #define map_key_clear(c) do { map_key(c); clear_bit(c, bit); } while (0) -#define map_ff_effect(c) do { set_bit(c, input->ffbit); } while (0) #ifdef CONFIG_USB_HIDINPUT_POWERBOOK @@ -527,23 +525,7 @@ static void hidinput_configure_usage(str case HID_UP_PID: - set_bit(EV_FF, input->evbit); switch(usage->hid & HID_USAGE) { - case 0x26: map_ff_effect(FF_CONSTANT); goto ignore; - case 0x27: map_ff_effect(FF_RAMP); goto ignore; - case 0x28: map_ff_effect(FF_CUSTOM); goto ignore; - case 0x30: map_ff_effect(FF_SQUARE); map_ff_effect(FF_PERIODIC); goto ignore; - case 0x31: map_ff_effect(FF_SINE); map_ff_effect(FF_PERIODIC); goto ignore; - case 0x32: map_ff_effect(FF_TRIANGLE); map_ff_effect(FF_PERIODIC); goto ignore; - case 0x33: map_ff_effect(FF_SAW_UP); map_ff_effect(FF_PERIODIC); goto ignore; - case 0x34: map_ff_effect(FF_SAW_DOWN); map_ff_effect(FF_PERIODIC); goto ignore; - case 0x40: map_ff_effect(FF_SPRING); goto ignore; - case 0x41: map_ff_effect(FF_DAMPER); goto ignore; - case 0x42: map_ff_effect(FF_INERTIA); goto ignore; - case 0x43: map_ff_effect(FF_FRICTION); goto ignore; - case 0x7e: map_ff(FF_GAIN); break; - case 0x83: input->ff_effects_max = field->value[0]; goto ignore; - case 0x98: map_ff(FF_AUTOCENTER); break; case 0xa4: map_key_clear(BTN_DEAD); break; default: goto ignore; } @@ -687,8 +669,7 @@ void hidinput_hid_event(struct hid_devic } if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max */ - input->ff_effects_max = value; - dbg("Maximum Effects - %d",input->ff_effects_max); + dbg("Maximum Effects - %d",value); return; } Index: linux-2.6.17-rc4-git12/drivers/usb/input/hid-pidff.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ linux-2.6.17-rc4-git12/drivers/usb/input/hid-pidff.c 2006-05-26 16:50:44.000000000 +0300 @@ -0,0 +1,1400 @@ +/* + * Force feedback driver for USB HID PID compliant devices + * + * Copyright (c) 2005, 2006 Anssi Hannula + */ + +/* + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +/* #define DEBUG */ + +#define debug(format, arg...) pr_debug("hid-pidff: " format "\n" , ## arg) + +#include +#include +#include + +#include "hid.h" + +/* Report usage table used to put reports into an array */ + +#define PID_SET_EFFECT 0 +#define PID_EFFECT_OPERATION 1 +#define PID_DEVICE_GAIN 2 +#define PID_POOL 3 +#define PID_BLOCK_LOAD 4 +#define PID_BLOCK_FREE 5 +#define PID_DEVICE_CONTROL 6 +#define PID_CREATE_NEW_EFFECT 7 + +#define PID_REQUIRED_REPORTS 7 + +#define PID_SET_ENVELOPE 8 +#define PID_SET_CONDITION 9 +#define PID_SET_PERIODIC 10 +#define PID_SET_CONSTANT 11 +#define PID_SET_RAMP 12 +static u8 pidff_reports[] = { 0x21, 0x77, 0x7d, 0x7f, 0x89, 0x90, 0x96, 0xab, + 0x5a, 0x5f, 0x6e, 0x73, 0x74 +}; + +/* device_control is really 0x95, but 0x96 specified as it is the usage of +the only field in that report */ + +/* Value usage tables used to put fields and values into arrays */ + +#define PID_EFFECT_BLOCK_INDEX 0 + +#define PID_DURATION 1 +#define PID_GAIN 2 +#define PID_TRIGGER_BUTTON 3 +#define PID_TRIGGER_REPEAT_INT 4 +#define PID_DIRECTION_ENABLE 5 +#define PID_START_DELAY 6 +static u8 pidff_set_effect[] = { 0x22, 0x50, 0x52, 0x53, 0x54, 0x56, 0xa7 }; + +#define PID_ATTACK_LEVEL 1 +#define PID_ATTACK_TIME 2 +#define PID_FADE_LEVEL 3 +#define PID_FADE_TIME 4 +static u8 pidff_set_envelope[] = { 0x22, 0x5b, 0x5c, 0x5d, 0x5e }; + +#define PID_PARAM_BLOCK_OFFSET 1 +#define PID_CP_OFFSET 2 +#define PID_POS_COEFFICIENT 3 +#define PID_NEG_COEFFICIENT 4 +#define PID_POS_SATURATION 5 +#define PID_NEG_SATURATION 6 +#define PID_DEAD_BAND 7 +static u8 pidff_set_condition[] = { 0x22, 0x23, 0x60, 0x61, 0x62, 0x63, 0x64, + 0x65 +}; + +#define PID_MAGNITUDE 1 +#define PID_OFFSET 2 +#define PID_PHASE 3 +#define PID_PERIOD 4 +static u8 pidff_set_periodic[] = { 0x22, 0x70, 0x6f, 0x71, 0x72 }; +static u8 pidff_set_constant[] = { 0x22, 0x70 }; + +#define PID_RAMP_START 1 +#define PID_RAMP_END 2 +static u8 pidff_set_ramp[] = { 0x22, 0x75, 0x76 }; + +#define PID_RAM_POOL_AVAILABLE 1 +static u8 pidff_block_load[] = { 0x22, 0xac }; + +#define PID_LOOP_COUNT 1 +static u8 pidff_effect_operation[] = { 0x22, 0x7c }; + +static u8 pidff_block_free[] = { 0x22 }; + +#define PID_DEVICE_GAIN_FIELD 0 +static u8 pidff_device_gain[] = { 0x7e }; + +#define PID_RAM_POOL_SIZE 0 +#define PID_SIMULTANEOUS_MAX 1 +#define PID_DEVICE_MANAGED_POOL 2 +static u8 pidff_pool[] = { 0x80, 0x83, 0xa9 }; + +/* Special field key tables used to put special field keys into arrays */ + +#define PID_ENABLE_ACTUATORS 0 +#define PID_RESET 1 +static u8 pidff_device_control[] = { 0x97, 0x9a }; + +#define PID_CONSTANT 0 +#define PID_RAMP 1 +#define PID_SQUARE 2 +#define PID_SINE 3 +#define PID_TRIANGLE 4 +#define PID_SAW_UP 5 +#define PID_SAW_DOWN 6 +#define PID_SPRING 7 +#define PID_DAMPER 8 +#define PID_INERTIA 9 +#define PID_FRICTION 10 +static u8 pidff_effect_types[] = { 0x26, 0x27, 0x30, 0x31, 0x32, 0x33, 0x34, + 0x40, 0x41, 0x42, 0x43 +}; + +#define PID_BLOCK_LOAD_SUCCESS 0 +#define PID_BLOCK_LOAD_FULL 1 +static u8 pidff_block_load_status[] = { 0x8c, 0x8d }; + +#define PID_EFFECT_START 0 +#define PID_EFFECT_STOP 1 +static u8 pidff_effect_operation_status[] = { 0x79, 0x7b }; + +struct pidff_usage { + struct hid_field *field; + s32 *value; +}; + +struct pidff_device { + + struct hid_report *reports[sizeof(pidff_reports)]; + + struct pidff_usage set_effect[sizeof(pidff_set_effect)]; + struct pidff_usage set_envelope[sizeof(pidff_set_envelope)]; + struct pidff_usage set_condition[sizeof(pidff_set_condition)]; + struct pidff_usage set_periodic[sizeof(pidff_set_periodic)]; + struct pidff_usage set_constant[sizeof(pidff_set_constant)]; + struct pidff_usage set_ramp[sizeof(pidff_set_ramp)]; + + struct pidff_usage device_gain[sizeof(pidff_device_gain)]; + struct pidff_usage block_load[sizeof(pidff_block_load)]; + struct pidff_usage pool[sizeof(pidff_pool)]; + struct pidff_usage effect_operation[sizeof(pidff_effect_operation)]; + struct pidff_usage block_free[sizeof(pidff_block_free)]; + + /* Special field is a field that is not composed of + usage<->value pairs that pidff_usage values are */ + + /* Special field in create_new_effect */ + struct hid_field *create_new_effect_type; + + /* Special fields in set_effect */ + struct hid_field *set_effect_type; + struct hid_field *effect_direction; + + /* Special field in device_control */ + struct hid_field *device_control; + + /* Special field in block_load */ + struct hid_field *block_load_status; + + /* Special field in effect_operation */ + struct hid_field *effect_operation_status; + + int control_id[sizeof(pidff_device_control)]; + int type_id[sizeof(pidff_effect_types)]; + int status_id[sizeof(pidff_block_load_status)]; + int operation_id[sizeof(pidff_effect_operation_status)]; + + int pid_id[FF_EFFECTS_MAX]; +}; + +static void pidff_exit(struct hid_device *hid) +{ + struct pidff_device *pidff = hid->ff_private; + debug("exiting"); + hid->ff_private = NULL; + kfree(pidff); +} + +/** + * Scale unsigned @i with max @max for the field @field + */ +static int pidff_rescale(int i, int max, struct hid_field *field) +{ + return i * (field->logical_maximum - field->logical_minimum) / max + + field->logical_minimum; +} + +/** + * Scale signed @i with max 0x7fff and min -0x8000 for the field @field + */ +static int pidff_rescale_signed(int i, struct hid_field *field) +{ + return i == 0 ? 0 : i > + 0 ? i * field->logical_maximum / 0x7fff : i * + field->logical_minimum / -0x8000; +} + +/** + * Scale unsigned @value for field in @usage and set it to @usage->value[0] + */ +static void pidff_set(struct pidff_usage *usage, u16 value) +{ + usage->value[0] = pidff_rescale(value, 0xffff, usage->field); + debug("calculated from %d to %d", value, usage->value[0]); +} + +/** + * Scale signed @value for field in @usage and set it to @usage->value[0] + */ +static void pidff_set_signed(struct pidff_usage *usage, s16 value) +{ + if (usage->field->logical_minimum < 0) + usage->value[0] = pidff_rescale_signed(value, usage->field); + else { + if (value < 0) + usage->value[0] = + pidff_rescale(-value, 0x8000, usage->field); + else + usage->value[0] = + pidff_rescale(value, 0x7fff, usage->field); + } + debug("calculated from %d to %d", value, usage->value[0]); +} + +/** + * Send envelope report to the device + */ +static void pidff_set_envelope_report(struct input_dev *dev, + struct ff_envelope *envelope) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + + pidff->set_envelope[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + + pidff->set_envelope[PID_ATTACK_LEVEL].value[0] = + pidff_rescale(envelope->attack_level > + 0x7fff ? 0x7fff : envelope->attack_level, 0x7fff, + pidff->set_envelope[PID_ATTACK_LEVEL].field); + pidff->set_envelope[PID_FADE_LEVEL].value[0] = + pidff_rescale(envelope->fade_level > + 0x7fff ? 0x7fff : envelope->fade_level, 0x7fff, + pidff->set_envelope[PID_FADE_LEVEL].field); + + pidff->set_envelope[PID_ATTACK_TIME].value[0] = envelope->attack_length; + pidff->set_envelope[PID_FADE_TIME].value[0] = envelope->fade_length; + + debug("attack %u => %d", envelope->attack_level, + pidff->set_envelope[PID_ATTACK_LEVEL].value[0]); + + hid_submit_report(hid, pidff->reports[PID_SET_ENVELOPE], USB_DIR_OUT); +} + +/** + * Test if the @envelope differs from @old + */ +static int pidff_needs_set_envelope(struct ff_envelope *envelope, + struct ff_envelope *old) +{ + return (envelope->attack_level != old->attack_level || + envelope->fade_level != old->fade_level || + envelope->attack_length != old->attack_length || + envelope->fade_length != old->fade_length); +} + +/** + * Send constant force report to the device + */ +static void pidff_set_constant_force_report(struct input_dev *dev, + struct ff_effect *effect) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + pidff->set_constant[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + pidff_set_signed(&pidff->set_constant[PID_MAGNITUDE], + effect->u.constant.level); + + hid_submit_report(hid, pidff->reports[PID_SET_CONSTANT], USB_DIR_OUT); +} + +/** + * Test if the constant parameters have changed between @effect and @old + */ +static int pidff_needs_set_constant(struct ff_effect *effect, + struct ff_effect *old) +{ + return (effect->u.constant.level != old->u.constant.level); +} + +/** + * Send set effect report to the device + */ +static void pidff_set_effect_report(struct input_dev *dev, + struct ff_effect *effect) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + pidff->set_effect[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + pidff->set_effect_type->value[0] = + pidff->create_new_effect_type->value[0]; + pidff->set_effect[PID_DURATION].value[0] = effect->replay.length; + pidff->set_effect[PID_TRIGGER_BUTTON].value[0] = effect->trigger.button; + pidff->set_effect[PID_TRIGGER_REPEAT_INT].value[0] = + effect->trigger.interval; + pidff->set_effect[PID_GAIN].value[0] = + pidff->set_effect[PID_GAIN].field->logical_maximum; + pidff->set_effect[PID_DIRECTION_ENABLE].value[0] = 1; + pidff->effect_direction->value[0] = + pidff_rescale(effect->direction, 0xffff, pidff->effect_direction); + pidff->set_effect[PID_START_DELAY].value[0] = effect->replay.delay; + + hid_submit_report(hid, pidff->reports[PID_SET_EFFECT], USB_DIR_OUT); +} + +/** + * Test if the values used in set_effect have changed between @effect and @old + */ +static int pidff_needs_set_effect(struct ff_effect *effect, + struct ff_effect *old) +{ + return (effect->replay.length != old->replay.length || + effect->trigger.interval != old->trigger.interval || + effect->trigger.button != old->trigger.button || + effect->direction != old->direction || + effect->replay.delay != old->replay.delay); +} + +/** + * Send periodic effect report to the device + */ +static void pidff_set_periodic_report(struct input_dev *dev, + struct ff_effect *effect) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + + pidff->set_periodic[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + pidff_set_signed(&pidff->set_periodic[PID_MAGNITUDE], + effect->u.periodic.magnitude); + pidff_set_signed(&pidff->set_periodic[PID_OFFSET], + effect->u.periodic.offset); + pidff_set(&pidff->set_periodic[PID_PHASE], effect->u.periodic.phase); + pidff->set_periodic[PID_PERIOD].value[0] = effect->u.periodic.period; + + hid_submit_report(hid, pidff->reports[PID_SET_PERIODIC], USB_DIR_OUT); + +} + +/** + * Test if periodic effect parameters have changed between @effect and @old + */ +static int pidff_needs_set_periodic(struct ff_effect *effect, + struct ff_effect *old) +{ + return (effect->u.periodic.magnitude != old->u.periodic.magnitude || + effect->u.periodic.offset != old->u.periodic.offset || + effect->u.periodic.phase != old->u.periodic.phase || + effect->u.periodic.period != old->u.periodic.period); +} + +/** + * Send condition effect reports to the device + */ +static void pidff_set_condition_report(struct input_dev *dev, + struct ff_effect *effect) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + int i; + + pidff->set_condition[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + + for (i = 0; i < 2; i++) { + pidff->set_condition[PID_PARAM_BLOCK_OFFSET].value[0] = i; + pidff_set_signed(&pidff->set_condition[PID_CP_OFFSET], + effect->u.condition[i].center); + pidff_set_signed(&pidff->set_condition[PID_POS_COEFFICIENT], + effect->u.condition[i].right_coeff); + pidff_set_signed(&pidff->set_condition[PID_NEG_COEFFICIENT], + effect->u.condition[i].left_coeff); + pidff_set(&pidff->set_condition[PID_POS_SATURATION], + effect->u.condition[i].right_saturation); + pidff_set(&pidff->set_condition[PID_NEG_SATURATION], + effect->u.condition[i].left_saturation); + pidff_set(&pidff->set_condition[PID_DEAD_BAND], + effect->u.condition[i].deadband); + hid_wait_io(hid); + hid_submit_report(hid, pidff->reports[PID_SET_CONDITION], + USB_DIR_OUT); + } + +} + +/** + * Test if condition effect parameters have changed between @effect and @old + */ +static int pidff_needs_set_condition(struct ff_effect *effect, + struct ff_effect *old) +{ + int i; + int ret = 0; + for (i = 0; i < 2; i++) + ret |= + effect->u.condition[i].center != old->u.condition[i].center + || effect->u.condition[i].right_coeff != + old->u.condition[i].right_coeff + || effect->u.condition[i].left_coeff != + old->u.condition[i].left_coeff + || effect->u.condition[i].right_saturation != + old->u.condition[i].right_saturation + || effect->u.condition[i].left_saturation != + old->u.condition[i].left_saturation + || effect->u.condition[i].deadband != + old->u.condition[i].deadband; + return ret; +} + +/** + * Send ramp force report to the device + */ +static void pidff_set_ramp_force_report(struct input_dev *dev, + struct ff_effect *effect) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + pidff->set_ramp[PID_EFFECT_BLOCK_INDEX].value[0] = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0]; + pidff_set_signed(&pidff->set_ramp[PID_RAMP_START], + effect->u.ramp.start_level); + pidff_set_signed(&pidff->set_ramp[PID_RAMP_END], + effect->u.ramp.end_level); + hid_submit_report(hid, pidff->reports[PID_SET_RAMP], USB_DIR_OUT); +} + +/** + * Test if ramp force parameters have changed between @effect and @old + */ +static int pidff_needs_set_ramp(struct ff_effect *effect, struct ff_effect *old) +{ + return (effect->u.ramp.start_level != old->u.ramp.start_level || + effect->u.ramp.end_level != old->u.ramp.end_level); +} + +/** + * Send a request for effect upload to the device + * @efnum: effect type number as assigned in pidff->type_id[] + * + * Returns 0 if device reported success, -ENOSPC if the device reported memory + * is full. Upon unknown response the function will retry for 60 times, if + * still unsuccessful -EIO is returned. + */ +static int pidff_request_effect_upload(struct input_dev *dev, int efnum) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + int j; + + pidff->create_new_effect_type->value[0] = efnum; + hid_submit_report(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; + hid_wait_io(hid); + + for (j = 0; j < 60; j++) { + debug("pid_block_load requested"); + hid_submit_report(hid, pidff->reports[PID_BLOCK_LOAD], + USB_DIR_IN); + hid_wait_io(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 @pidid for @value times + */ +static int pidff_playback_pid(struct input_dev *dev, int pid_id, int value) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + + pidff->effect_operation[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id; + + if (value == 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] = value; + } + hid_wait_io(hid); + hid_submit_report(hid, pidff->reports[PID_EFFECT_OPERATION], + USB_DIR_OUT); + return 0; +} + +/** + * 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 hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + return pidff_playback_pid(dev, pidff->pid_id[effect_id], value); +} + +/** + * Erase effect with PID id @pid_id + */ +static void pidff_erase_effect_pid(struct input_dev *dev, int pid_id) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + pidff->block_free[PID_EFFECT_BLOCK_INDEX].value[0] = pid_id; + hid_submit_report(hid, pidff->reports[PID_BLOCK_FREE], USB_DIR_OUT); +} + +/** + * Stop and erase effect with effect_id @effect_id + */ +static int pidff_erase_effect(struct input_dev *dev, int effect_id) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + debug("starting to erase %d/%d", effect_id, pidff->pid_id[effect_id]); + pidff_playback(dev, effect_id, 0); + pidff_erase_effect_pid(dev, pidff->pid_id[effect_id]); + return 0; +} + +/** + * Effect upload handler + */ +static int pidff_upload_effect(struct input_dev *dev, struct ff_effect *effect, + struct ff_effect *old) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + int ret = 0; + + switch (effect->type) { + case FF_CONSTANT: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_CONSTANT]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_constant(effect, old)) + pidff_set_constant_force_report(dev, effect); + if (!old + || pidff_needs_set_envelope(&effect->u.constant.envelope, + &old->u.constant.envelope)) + pidff_set_envelope_report(dev, + &effect->u.constant.envelope); + break; + case FF_PERIODIC: + if (!old) { + switch (effect->u.periodic.waveform) { + case FF_SQUARE: + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id + [PID_SQUARE]); + break; + case FF_TRIANGLE: + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id + [PID_TRIANGLE]); + break; + case FF_SINE: + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id + [PID_SINE]); + break; + case FF_SAW_UP: + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id + [PID_SAW_UP]); + break; + case FF_SAW_DOWN: + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id + [PID_SAW_DOWN]); + break; + default: + printk(KERN_ERR + "hid-pidff: invalid waveform\n"); + ret = -EINVAL; + } + } + if (ret) + return ret; + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_periodic(effect, old)) + pidff_set_periodic_report(dev, effect); + if (!old + || pidff_needs_set_envelope(&effect->u.periodic.envelope, + &old->u.periodic.envelope)) + pidff_set_envelope_report(dev, + &(effect->u.periodic. + envelope)); + break; + case FF_RAMP: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_RAMP]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_ramp(effect, old)) + pidff_set_ramp_force_report(dev, effect); + if (!old + || pidff_needs_set_envelope(&effect->u.ramp.envelope, + &old->u.ramp.envelope)) + pidff_set_envelope_report(dev, + &(effect->u.ramp.envelope)); + break; + case FF_SPRING: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_SPRING]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_condition(effect, old)) + pidff_set_condition_report(dev, effect); + break; + case FF_FRICTION: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_FRICTION]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_condition(effect, old)) + pidff_set_condition_report(dev, effect); + break; + case FF_DAMPER: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_DAMPER]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_condition(effect, old)) + pidff_set_condition_report(dev, effect); + break; + case FF_INERTIA: + if (!old) { + ret = + pidff_request_effect_upload(dev, + pidff-> + type_id[PID_INERTIA]); + if (ret) + return ret; + } + if (!old || pidff_needs_set_effect(effect, old)) + pidff_set_effect_report(dev, effect); + if (!old || pidff_needs_set_condition(effect, old)) + pidff_set_condition_report(dev, 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 hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + pidff_set(&pidff->device_gain[PID_DEVICE_GAIN_FIELD], gain); + hid_submit_report(hid, pidff->reports[PID_DEVICE_GAIN], USB_DIR_OUT); + return; + +} + +/** + * set_autocenter() handler + */ +static void pidff_set_autocenter(struct input_dev *dev, u16 magnitude) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + + if (!magnitude) { + pidff_playback_pid(dev, + pidff->block_load[PID_EFFECT_BLOCK_INDEX]. + field->logical_minimum, 0); + return; + } + + pidff_playback_pid(dev, + pidff->block_load[PID_EFFECT_BLOCK_INDEX].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_START_DELAY].value[0] = 0; + + hid_submit_report(hid, pidff->reports[PID_SET_EFFECT], USB_DIR_OUT); + +} + +/** + * Find fields from a report and fill a pidff_usage + * @usage: The pidff_usage to fill + * @table: The table that contains the fields to search + * @report: The report where the fields are searched + * count: sizeof(table) + * strict: Fail if some field is not found + */ +static int pidff_find_fields(struct pidff_usage *usage, 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 usage @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: OUTPUT or FEATURE reports + */ +static void pidff_find_reports(struct input_dev *dev, int report_type) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + + 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 that, + 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 input_dev *dev) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + 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 + * @report: The report from where to find + * @usage: The wanted usage + * @enforce_min: logical_minimum should be 1, otherwise return NULL + */ +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 not 1 when it should be\n"); + return NULL; + } + } + } + return NULL; +} + +/** + * Fill a pidff->*_id struct table + * @keys: The table that is to be filled + * @field: The field from where to find the values + * @usagetable: The table where the wanted values are listed + * @count: sizeof(usagetable) + */ +static int pidff_find_special_keys(int *keys, struct hid_field *field, + u8 * usagetable, int count) +{ + + int i, j; + int found = 0; + for (i = 0; i < count; i++) { + for (j = 0; j < field->maxusage; j++) { + if (field->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 input_dev *dev) +{ + struct hid_device *hid = dev->private; + struct ff_device *ff = dev->ff; + struct pidff_device *pidff = hid->ff_private; + int i; + + for (i = 0; i < sizeof(pidff_effect_types); i++) { + if (pidff->set_effect_type->usage[pidff->type_id[i]].hid != + pidff->create_new_effect_type->usage[pidff->type_id[i]]. + 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, ff->flags); + if (pidff->type_id[PID_RAMP]) + set_bit(FF_RAMP, ff->flags); + if (pidff->type_id[PID_SQUARE]) { + set_bit(FF_SQUARE, ff->flags); + set_bit(FF_PERIODIC, ff->flags); + } + if (pidff->type_id[PID_SINE]) { + set_bit(FF_SINE, ff->flags); + set_bit(FF_PERIODIC, ff->flags); + } + if (pidff->type_id[PID_TRIANGLE]) { + set_bit(FF_TRIANGLE, ff->flags); + set_bit(FF_PERIODIC, ff->flags); + } + if (pidff->type_id[PID_SAW_UP]) { + set_bit(FF_SAW_UP, ff->flags); + set_bit(FF_PERIODIC, ff->flags); + } + if (pidff->type_id[PID_SAW_DOWN]) { + set_bit(FF_SAW_DOWN, ff->flags); + set_bit(FF_PERIODIC, ff->flags); + } + if (pidff->type_id[PID_SPRING]) + set_bit(FF_SPRING, ff->flags); + if (pidff->type_id[PID_DAMPER]) + set_bit(FF_DAMPER, ff->flags); + if (pidff->type_id[PID_INERTIA]) + set_bit(FF_INERTIA, ff->flags); + if (pidff->type_id[PID_FRICTION]) + set_bit(FF_FRICTION, ff->flags); + + 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 input_dev *dev) +{ + struct hid_device *hid = dev->private; + struct ff_device *ff = dev->ff; + struct pidff_device *pidff = hid->ff_private; + 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(dev)) { + return -ENODEV; + } + + if (!envelope_ok) { + if (test_and_clear_bit(FF_CONSTANT, ff->flags)) + printk(KERN_WARNING + "hid-pidff: has constant effect but no envelope\n"); + if (test_and_clear_bit(FF_RAMP, ff->flags)) + printk(KERN_WARNING + "hid-pidff: has ramp effect but no envelope\n"); + if (test_and_clear_bit(FF_PERIODIC, ff->flags)) + printk(KERN_WARNING + "hid-pidff: has periodic effect but no envelope\n"); + } + + if (test_bit(FF_CONSTANT, ff->flags) + && PIDFF_FIND_FIELDS(set_constant, PID_SET_CONSTANT, 1)) { + printk(KERN_WARNING + "hid-pidff: unknown constant effect layout\n"); + clear_bit(FF_CONSTANT, ff->flags); + } + + if (test_bit(FF_RAMP, ff->flags) + && PIDFF_FIND_FIELDS(set_ramp, PID_SET_RAMP, 1)) { + printk(KERN_WARNING "hid-pidff: unknown ramp effect layout\n"); + clear_bit(FF_RAMP, ff->flags); + } + + if ((test_bit(FF_SPRING, ff->flags) || test_bit(FF_DAMPER, ff->flags) || + test_bit(FF_FRICTION, ff->flags) + || test_bit(FF_INERTIA, ff->flags)) + && PIDFF_FIND_FIELDS(set_condition, PID_SET_CONDITION, 1)) { + printk(KERN_WARNING + "hid-pidff: unknown condition effect layout\n"); + clear_bit(FF_SPRING, ff->flags); + clear_bit(FF_DAMPER, ff->flags); + clear_bit(FF_FRICTION, ff->flags); + clear_bit(FF_INERTIA, ff->flags); + } + + if (test_bit(FF_PERIODIC, ff->flags) + && PIDFF_FIND_FIELDS(set_periodic, PID_SET_PERIODIC, 1)) { + printk(KERN_WARNING + "hid-pidff: unknown periodic effect layout\n"); + clear_bit(FF_PERIODIC, ff->flags); + } + + PIDFF_FIND_FIELDS(pool, PID_POOL, 0); + + if (!PIDFF_FIND_FIELDS(device_gain, PID_DEVICE_GAIN, 1)) { + set_bit(FF_GAIN, ff->flags); + } + + return 0; +} + +/** + * Reset the device + */ +static void pidff_reset(struct input_dev *dev) +{ + struct hid_device *hid = dev->private; + struct pidff_device *pidff = hid->ff_private; + 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_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); + hid_wait_io(hid); + hid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); + hid_wait_io(hid); + + pidff->device_control->value[0] = + pidff->control_id[PID_ENABLE_ACTUATORS]; + hid_submit_report(hid, pidff->reports[PID_DEVICE_CONTROL], USB_DIR_OUT); + hid_wait_io(hid); + + /* pool report is sometimes messed up, refetch it */ + hid_submit_report(hid, pidff->reports[PID_POOL], USB_DIR_IN); + hid_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"); + hid_submit_report(hid, pidff->reports[PID_POOL], + USB_DIR_IN); + hid_wait_io(hid); + } + } +} + +/** + * Test if autocenter modification is using the supported method + */ +static int pidff_check_autocenter(struct input_dev *dev) +{ + struct hid_device *hid = dev->private; + struct ff_device *ff = dev->ff; + struct pidff_device *pidff = hid->ff_private; + int ret; + + /* 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 */ + + ret = pidff_request_effect_upload(dev, 1); + if (ret) { + printk(KERN_ERR "hid-pidff: upload request failed\n"); + return ret; + } + if (pidff->block_load[PID_EFFECT_BLOCK_INDEX].value[0] == + pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum + + 1) { + set_bit(FF_AUTOCENTER, ff->flags); + pidff_set_autocenter(dev, 0xffff); + } else { + printk(KERN_NOTICE + "hid-pidff: device has unknown autocenter control method\n"); + } + debug("status 11"); + pidff_erase_effect_pid(dev, + pidff->block_load[PID_EFFECT_BLOCK_INDEX]. + value[0]); + debug("status 12"); + + return 0; + +} + +static struct ff_driver pidff_driver = { + .upload = pidff_upload_effect, + .erase = pidff_erase_effect, + .set_gain = pidff_set_gain, + .set_autocenter = pidff_set_autocenter, + .playback = pidff_playback, +}; + +/** + * Check if the device is PID and initialize it + */ +int pidff_init(struct hid_device *hid) +{ + int ret; + struct pidff_device *pidff; + struct hid_report *report; + struct hid_input *hidinput = + list_entry(hid->inputs.next, struct hid_input, list); + struct input_dev *dev = hidinput->input; + struct ff_device *ff; + 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; + } + report = + list_entry(hid->report_enum[HID_OUTPUT_REPORT].report_list.next, + struct hid_report, list); + if (report->maxfield < 1 + || (report->field[0]->logical & HID_USAGE_PAGE) != HID_UP_PID) { + debug("not a PID device, first report not PID"); + return -ENODEV; + } + + pidff = kzalloc(sizeof(*pidff), GFP_KERNEL); + if (!pidff) + return -ENOMEM; + + ret = input_ff_allocate(dev); + if (ret) { + kfree(pidff); + return ret; + } + + ff = dev->ff; + hid->ff_private = pidff; + + debug("debug mode enabled"); + + pidff_find_reports(dev, HID_OUTPUT_REPORT); + pidff_find_reports(dev, HID_FEATURE_REPORT); + + if (!pidff_reports_ok(dev)) { + debug("reports not ok, aborting"); + pidff_exit(hid); + return -ENODEV; + } + + printk(KERN_INFO "Force feedback for USB HID PID devices by " + "Anssi Hannula \n"); + + ret = pidff_init_fields(dev); + if (ret) { + pidff_exit(hid); + return ret; + } + + pidff_reset(dev); + + if (test_bit(FF_GAIN, ff->flags)) + pidff_set_gain(dev, 0xffff); + + ret = pidff_check_autocenter(dev); + if (ret) { + pidff_exit(hid); + return ret; + } + + dev->ff_effects_max = + pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_maximum - + pidff->block_load[PID_EFFECT_BLOCK_INDEX].field->logical_minimum + + 1; + + debug("effects max is %d", dev->ff_effects_max); + if (pidff->pool[PID_SIMULTANEOUS_MAX].value) + debug("simultaneous effects max is %d", + pidff->pool[PID_SIMULTANEOUS_MAX].value[0]); + + if (dev->ff_effects_max > FF_EFFECTS_MAX) + dev->ff_effects_max = FF_EFFECTS_MAX; + + 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 advertises to not support device managed pool\n"); + } + + hid->ff_exit = pidff_exit; + + ret = input_ff_register(dev, &pidff_driver); + if (ret) { + kfree(pidff); + return ret; + } + + return 0; +} Index: linux-2.6.17-rc4-git12/drivers/usb/input/Kconfig =================================================================== --- linux-2.6.17-rc4-git12.orig/drivers/usb/input/Kconfig 2006-05-25 17:07:52.000000000 +0300 +++ linux-2.6.17-rc4-git12/drivers/usb/input/Kconfig 2006-05-26 16:50:38.000000000 +0300 @@ -60,10 +60,10 @@ config HID_FF If unsure, say N. config HID_PID - bool "PID Devices (Microsoft Sidewinder Force Feedback 2)" + bool "PID device support" depends on HID_FF help - Say Y here if you have a PID-compliant joystick and wish to enable force + Say Y here if you have a PID-compliant device and wish to enable force feedback for it. The Microsoft Sidewinder Force Feedback 2 is one such device. Index: linux-2.6.17-rc4-git12/drivers/usb/input/Makefile =================================================================== --- linux-2.6.17-rc4-git12.orig/drivers/usb/input/Makefile 2006-05-25 12:12:10.000000000 +0300 +++ linux-2.6.17-rc4-git12/drivers/usb/input/Makefile 2006-05-26 16:50:38.000000000 +0300 @@ -14,7 +14,7 @@ ifeq ($(CONFIG_USB_HIDINPUT),y) usbhid-objs += hid-input.o endif ifeq ($(CONFIG_HID_PID),y) - usbhid-objs += pid.o + usbhid-objs += hid-pidff.o endif ifeq ($(CONFIG_LOGITECH_FF),y) usbhid-objs += hid-lgff.o -- Anssi Hannula - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/