Input: use new FF interface in the HID force feedback drivers

Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

6 files changed, 116 insertions, 831 deletions

diff --git a/drivers/usb/input/Kconfig b/drivers/usb/input/Kconfig
index 7ec22c8decc8..3ca64c3cada3 100644
--- a/drivers/usb/input/Kconfig
+++ b/drivers/usb/input/Kconfig
@@ -70,6 +70,7 @@ config HID_PID
 config LOGITECH_FF
         bool "Logitech WingMan *3D support"
         depends on HID_FF
+        select INPUT_FF_MEMLESS if USB_HID
         help
           Say Y here if you have one of these devices:
           - Logitech WingMan Cordless RumblePad
@@ -81,6 +82,7 @@ config LOGITECH_FF
 config THRUSTMASTER_FF
         bool "ThrustMaster FireStorm Dual Power 2 support (EXPERIMENTAL)"
         depends on HID_FF && EXPERIMENTAL
+        select INPUT_FF_MEMLESS if USB_HID
         help
           Say Y here if you have a THRUSTMASTER FireStore Dual Power 2,
           and want to enable force feedback support for it.
diff --git a/drivers/usb/input/hid-core.c b/drivers/usb/input/hid-core.c
index b9fb9687f926..2f477a8badab 100644
--- a/drivers/usb/input/hid-core.c
+++ b/drivers/usb/input/hid-core.c
@@ -543,8 +543,6 @@ static void hid_free_device(struct hid_device *device)
 {
         unsigned i,j;
 
-        hid_ff_exit(device);
-
         for (i = 0; i < HID_REPORT_TYPES; i++) {
                 struct hid_report_enum *report_enum = device->report_enum + i;
 
diff --git a/drivers/usb/input/hid-input.c b/drivers/usb/input/hid-input.c
index 37b9ea8ec3b3..4c62afbeb430 100644
--- a/drivers/usb/input/hid-input.c
+++ b/drivers/usb/input/hid-input.c
@@ -729,7 +729,7 @@ static int hidinput_input_event(struct input_dev *dev, unsigned int type, unsign
         int offset;
 
         if (type == EV_FF)
-                return hid_ff_event(hid, dev, type, code, value);
+                return input_ff_event(dev, type, code, value);
 
         if (type != EV_LED)
                 return -1;
diff --git a/drivers/usb/input/hid-lgff.c b/drivers/usb/input/hid-lgff.c
index 7e264a8c81b1..93da222b6da8 100644
--- a/drivers/usb/input/hid-lgff.c
+++ b/drivers/usb/input/hid-lgff.c
@@ -1,12 +1,11 @@
 /*
- * $$
- *
  * Force feedback support for hid-compliant for some of the devices from
  * Logitech, namely:
  * - WingMan Cordless RumblePad
  * - WingMan Force 3D
  *
  *  Copyright (c) 2002-2004 Johann Deneux
+ *  Copyright (c) 2006 Anssi Hannula <anssi.hannula@gmail.com>
  */
 
 /*
@@ -29,495 +28,117 @@
  */
 
 #include <linux/input.h>
-#include <linux/sched.h>
-
-//#define DEBUG
 #include <linux/usb.h>
-
-#include <linux/circ_buf.h>
-
 #include "hid.h"
-#include "../../input/fixp-arith.h"
-
-
-/* Periodicity of the update */
-#define PERIOD (HZ/10)
-
-#define RUN_AT(t) (jiffies + (t))
-
-/* Effect status */
-#define EFFECT_STARTED 0     /* Effect is going to play after some time
-                                (ff_replay.delay) */
-#define EFFECT_PLAYING 1     /* Effect is being played */
-#define EFFECT_USED    2
-
-// For lgff_device::flags
-#define DEVICE_CLOSING 0     /* The driver is being unitialised */
-
-/* Check that the current process can access an effect */
-#define CHECK_OWNERSHIP(effect) (current->pid == 0 \
-        || effect.owner == current->pid)
-
-#define LGFF_CHECK_OWNERSHIP(i, l) \
-        (i>=0 && i<LGFF_EFFECTS \
-        && test_bit(EFFECT_USED, l->effects[i].flags) \
-        && CHECK_OWNERSHIP(l->effects[i]))
-
-#define LGFF_EFFECTS 8
 
 struct device_type {
         u16 idVendor;
         u16 idProduct;
-        signed short *ff;
-};
-
-struct lgff_effect {
-        pid_t owner;
-
-        struct ff_effect effect;
-
-        unsigned long flags[1];
-        unsigned int count;          /* Number of times left to play */
-        unsigned long started_at;    /* When the effect started to play */
-};
-
-struct lgff_device {
-        struct hid_device* hid;
-
-        struct hid_report* constant;
-        struct hid_report* rumble;
-        struct hid_report* condition;
-
-        struct lgff_effect effects[LGFF_EFFECTS];
-        spinlock_t lock;             /* device-level lock. Having locks on
-                                        a per-effect basis could be nice, but
-                                        isn't really necessary */
-
-        unsigned long flags[1];      /* Contains various information about the
-                                        state of the driver for this device */
-
-        struct timer_list timer;
+        const signed short *ff;
 };
 
-/* Callbacks */
-static void hid_lgff_exit(struct hid_device* hid);
-static int hid_lgff_event(struct hid_device *hid, struct input_dev *input,
-                          unsigned int type, unsigned int code, int value);
-static int hid_lgff_flush(struct input_dev *input, struct file *file);
-static int hid_lgff_upload_effect(struct input_dev *input,
-                                  struct ff_effect *effect);
-static int hid_lgff_erase(struct input_dev *input, int id);
-
-/* Local functions */
-static void hid_lgff_input_init(struct hid_device* hid);
-static void hid_lgff_timer(unsigned long timer_data);
-static struct hid_report* hid_lgff_duplicate_report(struct hid_report*);
-static void hid_lgff_delete_report(struct hid_report*);
-
-static signed short ff_rumble[] = {
+static const signed short ff_rumble[] = {
         FF_RUMBLE,
         -1
 };
 
-static signed short ff_joystick[] = {
+static const signed short ff_joystick[] = {
         FF_CONSTANT,
         -1
 };
 
-static struct device_type devices[] = {
-        {0x046d, 0xc211, ff_rumble},
-        {0x046d, 0xc219, ff_rumble},
-        {0x046d, 0xc283, ff_joystick},
-        {0x0000, 0x0000, ff_joystick}
+static const struct device_type devices[] = {
+        { 0x046d, 0xc211, ff_rumble },
+        { 0x046d, 0xc219, ff_rumble },
+        { 0x046d, 0xc283, ff_joystick },
+        { 0x0000, 0x0000, ff_joystick }
 };
 
+static int hid_lgff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+        struct hid_device *hid = dev->private;
+        struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
+        int x, y;
+        unsigned int left, right;
+
+#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
+
+        switch (effect->type) {
+        case FF_CONSTANT:
+                x = effect->u.ramp.start_level + 0x7f;  /* 0x7f is center */
+                y = effect->u.ramp.end_level + 0x7f;
+                CLAMP(x);
+                CLAMP(y);
+                report->field[0]->value[0] = 0x51;
+                report->field[0]->value[1] = 0x08;
+                report->field[0]->value[2] = x;
+                report->field[0]->value[3] = y;
+                dbg("(x, y)=(%04x, %04x)", x, y);
+                hid_submit_report(hid, report, USB_DIR_OUT);
+                break;
+
+        case FF_RUMBLE:
+                right = effect->u.rumble.strong_magnitude;
+                left = effect->u.rumble.weak_magnitude;
+                right = right * 0xff / 0xffff;
+                left = left * 0xff / 0xffff;
+                CLAMP(left);
+                CLAMP(right);
+                report->field[0]->value[0] = 0x42;
+                report->field[0]->value[1] = 0x00;
+                report->field[0]->value[2] = left;
+                report->field[0]->value[3] = right;
+                dbg("(left, right)=(%04x, %04x)", left, right);
+                hid_submit_report(hid, report, USB_DIR_OUT);
+                break;
+        }
+        return 0;
+}
+
 int hid_lgff_init(struct hid_device* hid)
 {
-        struct lgff_device *private;
-        struct hid_report* report;
-        struct hid_field* field;
+        struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
+        struct list_head *report_list = &hid->report_enum[HID_OUTPUT_REPORT].report_list;
+        struct input_dev *dev = hidinput->input;
+        struct hid_report *report;
+        struct hid_field *field;
+        int error;
+        int i, j;
 
         /* Find the report to use */
-        if (list_empty(&hid->report_enum[HID_OUTPUT_REPORT].report_list)) {
+        if (list_empty(report_list)) {
                 err("No output report found");
                 return -1;
         }
+
         /* Check that the report looks ok */
-        report = (struct hid_report*)hid->report_enum[HID_OUTPUT_REPORT].report_list.next;
+        report = list_entry(report_list->next, struct hid_report, list);
         if (!report) {
                 err("NULL output report");
                 return -1;
         }
+
         field = report->field[0];
         if (!field) {
                 err("NULL field");
                 return -1;
         }
 
-        private = kzalloc(sizeof(struct lgff_device), GFP_KERNEL);
-        if (!private)
-                return -1;
-        hid->ff_private = private;
-
-        /* Input init */
-        hid_lgff_input_init(hid);
-
-
-        private->constant = hid_lgff_duplicate_report(report);
-        if (!private->constant) {
-                kfree(private);
-                return -1;
-        }
-        private->constant->field[0]->value[0] = 0x51;
-        private->constant->field[0]->value[1] = 0x08;
-        private->constant->field[0]->value[2] = 0x7f;
-        private->constant->field[0]->value[3] = 0x7f;
-
-        private->rumble = hid_lgff_duplicate_report(report);
-        if (!private->rumble) {
-                hid_lgff_delete_report(private->constant);
-                kfree(private);
-                return -1;
-        }
-        private->rumble->field[0]->value[0] = 0x42;
-
-
-        private->condition = hid_lgff_duplicate_report(report);
-        if (!private->condition) {
-                hid_lgff_delete_report(private->rumble);
-                hid_lgff_delete_report(private->constant);
-                kfree(private);
-                return -1;
-        }
-
-        private->hid = hid;
-
-        spin_lock_init(&private->lock);
-        init_timer(&private->timer);
-        private->timer.data = (unsigned long)private;
-        private->timer.function = hid_lgff_timer;
-
-        /* Event and exit callbacks */
-        hid->ff_exit = hid_lgff_exit;
-        hid->ff_event = hid_lgff_event;
-
-        /* Start the update task */
-        private->timer.expires = RUN_AT(PERIOD);
-        add_timer(&private->timer);  /*TODO: only run the timer when at least
-                                       one effect is playing */
-
-        printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
-
-        return 0;
-}
-
-static struct hid_report* hid_lgff_duplicate_report(struct hid_report* report)
-{
-        struct hid_report* ret;
-
-        ret = kmalloc(sizeof(struct lgff_device), GFP_KERNEL);
-        if (!ret)
-                return NULL;
-        *ret = *report;
-
-        ret->field[0] = kmalloc(sizeof(struct hid_field), GFP_KERNEL);
-        if (!ret->field[0]) {
-                kfree(ret);
-                return NULL;
-        }
-        *ret->field[0] = *report->field[0];
-
-        ret->field[0]->value = kzalloc(sizeof(s32[8]), GFP_KERNEL);
-        if (!ret->field[0]->value) {
-                kfree(ret->field[0]);
-                kfree(ret);
-                return NULL;
-        }
-
-        return ret;
-}
-
-static void hid_lgff_delete_report(struct hid_report* report)
-{
-        if (report) {
-                kfree(report->field[0]->value);
-                kfree(report->field[0]);
-                kfree(report);
-        }
-}
-
-static void hid_lgff_input_init(struct hid_device* hid)
-{
-        struct device_type* dev = devices;
-        signed short* ff;
-        u16 idVendor = le16_to_cpu(hid->dev->descriptor.idVendor);
-        u16 idProduct = le16_to_cpu(hid->dev->descriptor.idProduct);
-        struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
-        struct input_dev *input_dev = hidinput->input;
-
-        while (dev->idVendor && (idVendor != dev->idVendor || idProduct != dev->idProduct))
-                dev++;
-
-        for (ff = dev->ff; *ff >= 0; ff++)
-                set_bit(*ff, input_dev->ffbit);
-
-        input_dev->upload_effect = hid_lgff_upload_effect;
-        input_dev->flush = hid_lgff_flush;
-
-        set_bit(EV_FF, input_dev->evbit);
-        input_dev->ff_effects_max = LGFF_EFFECTS;
-}
-
-static void hid_lgff_exit(struct hid_device* hid)
-{
-        struct lgff_device *lgff = hid->ff_private;
-
-        set_bit(DEVICE_CLOSING, lgff->flags);
-        del_timer_sync(&lgff->timer);
-
-        hid_lgff_delete_report(lgff->condition);
-        hid_lgff_delete_report(lgff->rumble);
-        hid_lgff_delete_report(lgff->constant);
-
-        kfree(lgff);
-}
-
-static int hid_lgff_event(struct hid_device *hid, struct input_dev* input,
-                          unsigned int type, unsigned int code, int value)
-{
-        struct lgff_device *lgff = hid->ff_private;
-        struct lgff_effect *effect = lgff->effects + code;
-        unsigned long flags;
-
-        if (type != EV_FF)                     return -EINVAL;
-        if (!LGFF_CHECK_OWNERSHIP(code, lgff)) return -EACCES;
-        if (value < 0)                         return -EINVAL;
-
-        spin_lock_irqsave(&lgff->lock, flags);
-
-        if (value > 0) {
-                if (test_bit(EFFECT_STARTED, effect->flags)) {
-                        spin_unlock_irqrestore(&lgff->lock, flags);
-                        return -EBUSY;
-                }
-                if (test_bit(EFFECT_PLAYING, effect->flags)) {
-                        spin_unlock_irqrestore(&lgff->lock, flags);
-                        return -EBUSY;
-                }
-
-                effect->count = value;
-
-                if (effect->effect.replay.delay) {
-                        set_bit(EFFECT_STARTED, effect->flags);
-                } else {
-                        set_bit(EFFECT_PLAYING, effect->flags);
-                }
-                effect->started_at = jiffies;
-        }
-        else { /* value == 0 */
-                clear_bit(EFFECT_STARTED, effect->flags);
-                clear_bit(EFFECT_PLAYING, effect->flags);
-        }
-
-        spin_unlock_irqrestore(&lgff->lock, flags);
-
-        return 0;
-
-}
-
-/* Erase all effects this process owns */
-static int hid_lgff_flush(struct input_dev *dev, struct file *file)
-{
-        struct hid_device *hid = dev->private;
-        struct lgff_device *lgff = hid->ff_private;
-        int i;
-
-        for (i=0; i<dev->ff_effects_max; ++i) {
-
-                /*NOTE: no need to lock here. The only times EFFECT_USED is
-                  modified is when effects are uploaded or when an effect is
-                  erased. But a process cannot close its dev/input/eventX fd
-                  and perform ioctls on the same fd all at the same time */
-                if ( current->pid == lgff->effects[i].owner
-                     && test_bit(EFFECT_USED, lgff->effects[i].flags)) {
-
-                        if (hid_lgff_erase(dev, i))
-                                warn("erase effect %d failed", i);
-                }
-
-        }
-
-        return 0;
-}
-
-static int hid_lgff_erase(struct input_dev *dev, int id)
-{
-        struct hid_device *hid = dev->private;
-        struct lgff_device *lgff = hid->ff_private;
-        unsigned long flags;
-
-        if (!LGFF_CHECK_OWNERSHIP(id, lgff)) return -EACCES;
-
-        spin_lock_irqsave(&lgff->lock, flags);
-        lgff->effects[id].flags[0] = 0;
-        spin_unlock_irqrestore(&lgff->lock, flags);
-
-        return 0;
-}
-
-static int hid_lgff_upload_effect(struct input_dev* input,
-                                  struct ff_effect* effect)
-{
-        struct hid_device *hid = input->private;
-        struct lgff_device *lgff = hid->ff_private;
-        struct lgff_effect new;
-        int id;
-        unsigned long flags;
-
-        dbg("ioctl rumble");
-
-        if (!test_bit(effect->type, input->ffbit)) return -EINVAL;
-
-        spin_lock_irqsave(&lgff->lock, flags);
-
-        if (effect->id == -1) {
-                int i;
-
-                for (i=0; i<LGFF_EFFECTS && test_bit(EFFECT_USED, lgff->effects[i].flags); ++i);
-                if (i >= LGFF_EFFECTS) {
-                        spin_unlock_irqrestore(&lgff->lock, flags);
-                        return -ENOSPC;
+        for (i = 0; i < ARRAY_SIZE(devices); i++) {
+                if (dev->id.vendor == devices[i].idVendor &&
+                    dev->id.product == devices[i].idProduct) {
+                        for (j = 0; devices[i].ff[j] >= 0; j++)
+                                set_bit(devices[i].ff[j], dev->ffbit);
+                        break;
                 }
-
-                effect->id = i;
-                lgff->effects[i].owner = current->pid;
-                lgff->effects[i].flags[0] = 0;
-                set_bit(EFFECT_USED, lgff->effects[i].flags);
         }
-        else if (!LGFF_CHECK_OWNERSHIP(effect->id, lgff)) {
-                spin_unlock_irqrestore(&lgff->lock, flags);
-                return -EACCES;
-        }
-
-        id = effect->id;
-        new = lgff->effects[id];
-
-        new.effect = *effect;
-
-        if (test_bit(EFFECT_STARTED, lgff->effects[id].flags)
-            || test_bit(EFFECT_STARTED, lgff->effects[id].flags)) {
-
-                /* Changing replay parameters is not allowed (for the time
-                   being) */
-                if (new.effect.replay.delay != lgff->effects[id].effect.replay.delay
-                    || new.effect.replay.length != lgff->effects[id].effect.replay.length) {
-                        spin_unlock_irqrestore(&lgff->lock, flags);
-                        return -ENOSYS;
-                }
 
-                lgff->effects[id] = new;
+        error = input_ff_create_memless(dev, NULL, hid_lgff_play);
+        if (error)
+                return error;
 
-        } else {
-                lgff->effects[id] = new;
-        }
+        printk(KERN_INFO "Force feedback for Logitech force feedback devices by Johann Deneux <johann.deneux@it.uu.se>\n");
 
-        spin_unlock_irqrestore(&lgff->lock, flags);
         return 0;
 }
-
-static void hid_lgff_timer(unsigned long timer_data)
-{
-        struct lgff_device *lgff = (struct lgff_device*)timer_data;
-        struct hid_device *hid = lgff->hid;
-        unsigned long flags;
-        int x = 0x7f, y = 0x7f;   // Coordinates of constant effects
-        unsigned int left = 0, right = 0;   // Rumbling
-        int i;
-
-        spin_lock_irqsave(&lgff->lock, flags);
-
-        for (i=0; i<LGFF_EFFECTS; ++i) {
-                struct lgff_effect* effect = lgff->effects +i;
-
-                if (test_bit(EFFECT_PLAYING, effect->flags)) {
-
-                        switch (effect->effect.type) {
-                        case FF_CONSTANT: {
-                                //TODO: handle envelopes
-                                int degrees = effect->effect.direction * 360 >> 16;
-                                x += fixp_mult(fixp_sin(degrees),
-                                               fixp_new16(effect->effect.u.constant.level));
-                                y += fixp_mult(-fixp_cos(degrees),
-                                               fixp_new16(effect->effect.u.constant.level));
-                        }       break;
-                        case FF_RUMBLE:
-                                right += effect->effect.u.rumble.strong_magnitude;
-                                left += effect->effect.u.rumble.weak_magnitude;
-                                break;
-                        };
-
-                        /* One run of the effect is finished playing */
-                        if (time_after(jiffies,
-                                        effect->started_at
-                                        + effect->effect.replay.delay*HZ/1000
-                                        + effect->effect.replay.length*HZ/1000)) {
-                                dbg("Finished playing once %d", i);
-                                if (--effect->count <= 0) {
-                                        dbg("Stopped %d", i);
-                                        clear_bit(EFFECT_PLAYING, effect->flags);
-                                }
-                                else {
-                                        dbg("Start again %d", i);
-                                        if (effect->effect.replay.length != 0) {
-                                                clear_bit(EFFECT_PLAYING, effect->flags);
-                                                set_bit(EFFECT_STARTED, effect->flags);
-                                        }
-                                        effect->started_at = jiffies;
-                                }
-                        }
-
-                } else if (test_bit(EFFECT_STARTED, lgff->effects[i].flags)) {
-                        /* Check if we should start playing the effect */
-                        if (time_after(jiffies,
-                                        lgff->effects[i].started_at
-                                        + lgff->effects[i].effect.replay.delay*HZ/1000)) {
-                                dbg("Now playing %d", i);
-                                clear_bit(EFFECT_STARTED, lgff->effects[i].flags);
-                                set_bit(EFFECT_PLAYING, lgff->effects[i].flags);
-                        }
-                }
-        }
-
-#define CLAMP(x) if (x < 0) x = 0; if (x > 0xff) x = 0xff
-
-        // Clamp values
-        CLAMP(x);
-        CLAMP(y);
-        CLAMP(left);
-        CLAMP(right);
-
-#undef CLAMP
-
-        if (x != lgff->constant->field[0]->value[2]
-            || y != lgff->constant->field[0]->value[3]) {
-                lgff->constant->field[0]->value[2] = x;
-                lgff->constant->field[0]->value[3] = y;
-                dbg("(x,y)=(%04x, %04x)", x, y);
-                hid_submit_report(hid, lgff->constant, USB_DIR_OUT);
-        }
-
-        if (left != lgff->rumble->field[0]->value[2]
-            || right != lgff->rumble->field[0]->value[3]) {
-                lgff->rumble->field[0]->value[2] = left;
-                lgff->rumble->field[0]->value[3] = right;
-                dbg("(left,right)=(%04x, %04x)", left, right);
-                hid_submit_report(hid, lgff->rumble, USB_DIR_OUT);
-        }
-
-        if (!test_bit(DEVICE_CLOSING, lgff->flags)) {
-                lgff->timer.expires = RUN_AT(PERIOD);
-                add_timer(&lgff->timer);
-        }
-
-        spin_unlock_irqrestore(&lgff->lock, flags);
-}
diff --git a/drivers/usb/input/hid-tmff.c b/drivers/usb/input/hid-tmff.c
index bc6c54c4c7d3..2d5be4c318ac 100644
--- a/drivers/usb/input/hid-tmff.c
+++ b/drivers/usb/input/hid-tmff.c
@@ -28,97 +28,65 @@
  */
 
 #include <linux/input.h>
-#include <linux/sched.h>
 
 #undef DEBUG
 #include <linux/usb.h>
 
-#include <linux/circ_buf.h>
-
 #include "hid.h"
-#include "../../input/fixp-arith.h"
 
 /* Usages for thrustmaster devices I know about */
 #define THRUSTMASTER_USAGE_RUMBLE_LR    (HID_UP_GENDESK | 0xbb)
-#define DELAY_CALC(t,delay)             ((t) + (delay)*HZ/1000)
-
-/* Effect status */
-#define EFFECT_STARTED 0        /* Effect is going to play after some time */
-#define EFFECT_PLAYING 1        /* Effect is playing */
-#define EFFECT_USED    2
-
-/* For tmff_device::flags */
-#define DEVICE_CLOSING 0        /* The driver is being unitialised */
-
-/* Check that the current process can access an effect */
-#define CHECK_OWNERSHIP(effect) (current->pid == 0 \
-        || effect.owner == current->pid)
-
-#define TMFF_CHECK_ID(id)       ((id) >= 0 && (id) < TMFF_EFFECTS)
 
-#define TMFF_CHECK_OWNERSHIP(i, l) \
-        (test_bit(EFFECT_USED, l->effects[i].flags) \
-        && CHECK_OWNERSHIP(l->effects[i]))
-
-#define TMFF_EFFECTS 8
-
-struct tmff_effect {
-        pid_t owner;
-
-        struct ff_effect effect;
-
-        unsigned long flags[1];
-        unsigned int count;             /* Number of times left to play */
-
-        unsigned long play_at;          /* When the effect starts to play */
-        unsigned long stop_at;          /* When the effect ends */
-};
 
 struct tmff_device {
-        struct hid_device *hid;
-
         struct hid_report *report;
-
         struct hid_field *rumble;
+};
 
-        unsigned int effects_playing;
-        struct tmff_effect effects[TMFF_EFFECTS];
-        spinlock_t lock;             /* device-level lock. Having locks on
-                                        a per-effect basis could be nice, but
-                                        isn't really necessary */
+/* Changes values from 0 to 0xffff into values from minimum to maximum */
+static inline int hid_tmff_scale(unsigned int in, int minimum, int maximum)
+{
+        int ret;
 
-        unsigned long flags[1];      /* Contains various information about the
-                                        state of the driver for this device */
+        ret = (in * (maximum - minimum) / 0xffff) + minimum;
+        if (ret < minimum)
+                return minimum;
+        if (ret > maximum)
+                return maximum;
+        return ret;
+}
 
-        struct timer_list timer;
-};
+static int hid_tmff_play(struct input_dev *dev, void *data, struct ff_effect *effect)
+{
+        struct hid_device *hid = dev->private;
+        struct tmff_device *tmff = data;
+        int left, right;        /* Rumbling */
 
-/* Callbacks */
-static void hid_tmff_exit(struct hid_device *hid);
-static int hid_tmff_event(struct hid_device *hid, struct input_dev *input,
-                          unsigned int type, unsigned int code, int value);
-static int hid_tmff_flush(struct input_dev *input, struct file *file);
-static int hid_tmff_upload_effect(struct input_dev *input,
-                                  struct ff_effect *effect);
-static int hid_tmff_erase(struct input_dev *input, int id);
+        left = hid_tmff_scale(effect->u.rumble.weak_magnitude,
+                tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
+        right = hid_tmff_scale(effect->u.rumble.strong_magnitude,
+                tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
 
-/* Local functions */
-static void hid_tmff_recalculate_timer(struct tmff_device *tmff);
-static void hid_tmff_timer(unsigned long timer_data);
+        tmff->rumble->value[0] = left;
+        tmff->rumble->value[1] = right;
+        dbg("(left,right)=(%08x, %08x)", left, right);
+        hid_submit_report(hid, tmff->report, USB_DIR_OUT);
+
+        return 0;
+}
 
 int hid_tmff_init(struct hid_device *hid)
 {
-        struct tmff_device *private;
+        struct tmff_device *tmff;
         struct list_head *pos;
         struct hid_input *hidinput = list_entry(hid->inputs.next, struct hid_input, list);
         struct input_dev *input_dev = hidinput->input;
+        int error;
 
-        private = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
-        if (!private)
+        tmff = kzalloc(sizeof(struct tmff_device), GFP_KERNEL);
+        if (!tmff)
                 return -ENOMEM;
 
-        hid->ff_private = private;
-
         /* Find the report to use */
         __list_for_each(pos, &hid->report_enum[HID_OUTPUT_REPORT].report_list) {
                 struct hid_report *report = (struct hid_report *)pos;
@@ -142,18 +110,18 @@ int hid_tmff_init(struct hid_device *hid)
                                                 continue;
                                         }
 
-                                        if (private->report && private->report != report) {
+                                        if (tmff->report && tmff->report != report) {
                                                 warn("ignoring THRUSTMASTER_USAGE_RUMBLE_LR in other report");
                                                 continue;
                                         }
 
-                                        if (private->rumble && private->rumble != field) {
+                                        if (tmff->rumble && tmff->rumble != field) {
                                                 warn("ignoring duplicate THRUSTMASTER_USAGE_RUMBLE_LR");
                                                 continue;
                                         }
 
-                                        private->report = report;
-                                        private->rumble = field;
+                                        tmff->report = report;
+                                        tmff->rumble = field;
 
                                         set_bit(FF_RUMBLE, input_dev->ffbit);
                                         break;
@@ -162,302 +130,17 @@ int hid_tmff_init(struct hid_device *hid)
                                         warn("ignoring unknown output usage %08x", field->usage[0].hid);
                                         continue;
                         }
-
-                        /* Fallthrough to here only when a valid usage is found */
-                        input_dev->upload_effect = hid_tmff_upload_effect;
-                        input_dev->flush = hid_tmff_flush;
-
-                        set_bit(EV_FF, input_dev->evbit);
-                        input_dev->ff_effects_max = TMFF_EFFECTS;
                 }
         }
 
-        private->hid = hid;
-
-        spin_lock_init(&private->lock);
-        init_timer(&private->timer);
-        private->timer.data = (unsigned long)private;
-        private->timer.function = hid_tmff_timer;
-
-        /* Event and exit callbacks */
-        hid->ff_exit = hid_tmff_exit;
-        hid->ff_event = hid_tmff_event;
-
-        info("Force feedback for ThrustMaster rumble pad devices by Zinx Verituse <zinx@epicsol.org>");
-
-        return 0;
-}
-
-static void hid_tmff_exit(struct hid_device *hid)
-{
-        struct tmff_device *tmff = hid->ff_private;
-        unsigned long flags;
-
-        spin_lock_irqsave(&tmff->lock, flags);
-
-        set_bit(DEVICE_CLOSING, tmff->flags);
-        del_timer_sync(&tmff->timer);
-
-        spin_unlock_irqrestore(&tmff->lock, flags);
-
-        kfree(tmff);
-}
-
-static int hid_tmff_event(struct hid_device *hid, struct input_dev *input,
-                          unsigned int type, unsigned int code, int value)
-{
-        struct tmff_device *tmff = hid->ff_private;
-        struct tmff_effect *effect = &tmff->effects[code];
-        unsigned long flags;
-
-        if (type != EV_FF)
-                return -EINVAL;
-        if (!TMFF_CHECK_ID(code))
-                return -EINVAL;
-        if (!TMFF_CHECK_OWNERSHIP(code, tmff))
-                return -EACCES;
-        if (value < 0)
-                return -EINVAL;
-
-        spin_lock_irqsave(&tmff->lock, flags);
-
-        if (value > 0) {
-                set_bit(EFFECT_STARTED, effect->flags);
-                clear_bit(EFFECT_PLAYING, effect->flags);
-                effect->count = value;
-                effect->play_at = DELAY_CALC(jiffies, effect->effect.replay.delay);
-        } else {
-                clear_bit(EFFECT_STARTED, effect->flags);
-                clear_bit(EFFECT_PLAYING, effect->flags);
-        }
-
-        hid_tmff_recalculate_timer(tmff);
-
-        spin_unlock_irqrestore(&tmff->lock, flags);
-
-        return 0;
-
-}
-
-/* Erase all effects this process owns */
-
-static int hid_tmff_flush(struct input_dev *dev, struct file *file)
-{
-        struct hid_device *hid = dev->private;
-        struct tmff_device *tmff = hid->ff_private;
-        int i;
-
-        for (i=0; i<dev->ff_effects_max; ++i)
-
-             /* NOTE: no need to lock here. The only times EFFECT_USED is
-                modified is when effects are uploaded or when an effect is
-                erased. But a process cannot close its dev/input/eventX fd
-                and perform ioctls on the same fd all at the same time */
-
-                if (current->pid == tmff->effects[i].owner
-                     && test_bit(EFFECT_USED, tmff->effects[i].flags))
-                        if (hid_tmff_erase(dev, i))
-                                warn("erase effect %d failed", i);
-
-
-        return 0;
-}
-
-static int hid_tmff_erase(struct input_dev *dev, int id)
-{
-        struct hid_device *hid = dev->private;
-        struct tmff_device *tmff = hid->ff_private;
-        unsigned long flags;
-
-        if (!TMFF_CHECK_ID(id))
-                return -EINVAL;
-        if (!TMFF_CHECK_OWNERSHIP(id, tmff))
-                return -EACCES;
-
-        spin_lock_irqsave(&tmff->lock, flags);
-
-        tmff->effects[id].flags[0] = 0;
-        hid_tmff_recalculate_timer(tmff);
-
-        spin_unlock_irqrestore(&tmff->lock, flags);
-
-        return 0;
-}
-
-static int hid_tmff_upload_effect(struct input_dev *input,
-                                  struct ff_effect *effect)
-{
-        struct hid_device *hid = input->private;
-        struct tmff_device *tmff = hid->ff_private;
-        int id;
-        unsigned long flags;
-
-        if (!test_bit(effect->type, input->ffbit))
-                return -EINVAL;
-        if (effect->id != -1 && !TMFF_CHECK_ID(effect->id))
-                return -EINVAL;
-
-        spin_lock_irqsave(&tmff->lock, flags);
-
-        if (effect->id == -1) {
-                /* Find a free effect */
-                for (id = 0; id < TMFF_EFFECTS && test_bit(EFFECT_USED, tmff->effects[id].flags); ++id);
-
-                if (id >= TMFF_EFFECTS) {
-                        spin_unlock_irqrestore(&tmff->lock, flags);
-                        return -ENOSPC;
-                }
-
-                effect->id = id;
-                tmff->effects[id].owner = current->pid;
-                tmff->effects[id].flags[0] = 0;
-                set_bit(EFFECT_USED, tmff->effects[id].flags);
-
-        } else {
-                /* Re-uploading an owned effect, to change parameters */
-                id = effect->id;
-                clear_bit(EFFECT_PLAYING, tmff->effects[id].flags);
+        error = input_ff_create_memless(input_dev, tmff, hid_tmff_play);
+        if (error) {
+                kfree(tmff);
+                return error;
         }
 
-        tmff->effects[id].effect = *effect;
-
-        hid_tmff_recalculate_timer(tmff);
+        info("Force feedback for ThrustMaster rumble pad devices by Zinx Verituse <zinx@epicsol.org>");
 
-        spin_unlock_irqrestore(&tmff->lock, flags);
         return 0;
 }
 
-/* Start the timer for the next start/stop/delay */
-/* Always call this while tmff->lock is locked */
-
-static void hid_tmff_recalculate_timer(struct tmff_device *tmff)
-{
-        int i;
-        int events = 0;
-        unsigned long next_time;
-
-        next_time = 0;  /* Shut up compiler's incorrect warning */
-
-        /* Find the next change in an effect's status */
-        for (i = 0; i < TMFF_EFFECTS; ++i) {
-                struct tmff_effect *effect = &tmff->effects[i];
-                unsigned long play_time;
-
-                if (!test_bit(EFFECT_STARTED, effect->flags))
-                        continue;
-
-                effect->stop_at = DELAY_CALC(effect->play_at, effect->effect.replay.length);
-
-                if (!test_bit(EFFECT_PLAYING, effect->flags))
-                        play_time = effect->play_at;
-                else
-                        play_time = effect->stop_at;
-
-                events++;
-
-                if (time_after(jiffies, play_time))
-                        play_time = jiffies;
-
-                if (events == 1)
-                        next_time = play_time;
-                else {
-                        if (time_after(next_time, play_time))
-                                next_time = play_time;
-                }
-        }
-
-        if (!events && tmff->effects_playing) {
-                /* Treat all effects turning off as an event */
-                events = 1;
-                next_time = jiffies;
-        }
-
-        if (!events) {
-                /* No events, no time, no need for a timer. */
-                del_timer_sync(&tmff->timer);
-                return;
-        }
-
-        mod_timer(&tmff->timer, next_time);
-}
-
-/* Changes values from 0 to 0xffff into values from minimum to maximum */
-static inline int hid_tmff_scale(unsigned int in, int minimum, int maximum)
-{
-        int ret;
-
-        ret = (in * (maximum - minimum) / 0xffff) + minimum;
-        if (ret < minimum)
-                return minimum;
-        if (ret > maximum)
-                return maximum;
-        return ret;
-}
-
-static void hid_tmff_timer(unsigned long timer_data)
-{
-        struct tmff_device *tmff = (struct tmff_device *) timer_data;
-        struct hid_device *hid = tmff->hid;
-        unsigned long flags;
-        int left = 0, right = 0;        /* Rumbling */
-        int i;
-
-        spin_lock_irqsave(&tmff->lock, flags);
-
-        tmff->effects_playing = 0;
-
-        for (i = 0; i < TMFF_EFFECTS; ++i) {
-                struct tmff_effect *effect = &tmff->effects[i];
-
-                if (!test_bit(EFFECT_STARTED, effect->flags))
-                        continue;
-
-                if (!time_after(jiffies, effect->play_at))
-                        continue;
-
-                if (time_after(jiffies, effect->stop_at)) {
-
-                        dbg("Finished playing once %d", i);
-                        clear_bit(EFFECT_PLAYING, effect->flags);
-
-                        if (--effect->count <= 0) {
-                                dbg("Stopped %d", i);
-                                clear_bit(EFFECT_STARTED, effect->flags);
-                                continue;
-                        } else {
-                                dbg("Start again %d", i);
-                                effect->play_at = DELAY_CALC(jiffies, effect->effect.replay.delay);
-                                continue;
-                        }
-                }
-
-                ++tmff->effects_playing;
-
-                set_bit(EFFECT_PLAYING, effect->flags);
-
-                switch (effect->effect.type) {
-                        case FF_RUMBLE:
-                                right += effect->effect.u.rumble.strong_magnitude;
-                                left += effect->effect.u.rumble.weak_magnitude;
-                                break;
-                        default:
-                                BUG();
-                                break;
-                }
-        }
-
-        left = hid_tmff_scale(left, tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
-        right = hid_tmff_scale(right, tmff->rumble->logical_minimum, tmff->rumble->logical_maximum);
-
-        if (left != tmff->rumble->value[0] || right != tmff->rumble->value[1]) {
-                tmff->rumble->value[0] = left;
-                tmff->rumble->value[1] = right;
-                dbg("(left,right)=(%08x, %08x)", left, right);
-                hid_submit_report(hid, tmff->report, USB_DIR_OUT);
-        }
-
-        if (!test_bit(DEVICE_CLOSING, tmff->flags))
-                hid_tmff_recalculate_timer(tmff);
-
-        spin_unlock_irqrestore(&tmff->lock, flags);
-}
diff --git a/drivers/usb/input/hid.h b/drivers/usb/input/hid.h
index 29f1613bd08c..6d88c0c0b903 100644
--- a/drivers/usb/input/hid.h
+++ b/drivers/usb/input/hid.h
@@ -449,11 +449,6 @@ struct hid_device {							/* device report descriptor */
         char phys[64];                                                  /* Device physical location */
         char uniq[64];                                                  /* Device unique identifier (serial #) */
 
-        void *ff_private;                                               /* Private data for the force-feedback driver */
-        void (*ff_exit)(struct hid_device*);                            /* Called by hid_exit_ff(hid) */
-        int (*ff_event)(struct hid_device *hid, struct input_dev *input,
-                        unsigned int type, unsigned int code, int value);
-
 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
         unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
         unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
@@ -540,17 +535,3 @@ static inline int hid_pidff_init(struct hid_device *hid) { return -ENODEV; }
 static inline int hid_ff_init(struct hid_device *hid) { return -1; }
 #endif
 
-static inline void hid_ff_exit(struct hid_device *hid)
-{
-        if (hid->ff_exit)
-                hid->ff_exit(hid);
-}
-
-static inline int hid_ff_event(struct hid_device *hid, struct input_dev *input,
-                        unsigned int type, unsigned int code, int value)
-{
-        if (hid->ff_event)
-                return hid->ff_event(hid, input, type, code, value);
-        return -ENOSYS;
-}
-