linux/drivers/hid/usbhid/hid-pidff.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

1334 lines
36 KiB
C

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