Changelogs (since 0.4.0):

        1. Make hidinput_disconnect_core() be more robust, it can not break 
anything even failed to allocate device struct.
        2. Thanks new input device driver API, we need not the extra code for 
support force-feed device yet, so say bye to CONFIG_HID_SIMPLE_FF.

This is one patch of The HID Simple Driver patches, for convenience, you can 
find them all in that mail:

[PATCH] usb/hid: The HID Simple Driver Patches 0.4.1 (all-in-one)

The code base is 2.6.19.

Is this ready to merge? or What still is problem in them? Thanks.

Signed-off-by: Liyu <[EMAIL PROTECTED]>

diff -Naurp linux-2.6.19.orig/drivers/usb/input/hid-core.c 
linux-2.6.19/drivers/usb/input/hid-core.c
--- linux-2.6.19.orig/drivers/usb/input/hid-core.c      2006-11-30 
05:57:37.000000000 +0800
+++ linux-2.6.19/drivers/usb/input/hid-core.c   2006-12-05 09:47:11.000000000 
+0800
@@ -26,6 +26,7 @@
 #include <asm/byteorder.h>
 #include <linux/input.h>
 #include <linux/wait.h>
+#include <linux/mutex.h>
 
 #undef DEBUG
 #undef DEBUG_DATA
@@ -33,6 +34,7 @@
 #include <linux/usb.h>
 
 #include "hid.h"
+#include "hid-simple.h"
 #include <linux/hiddev.h>
 
 /*
@@ -46,6 +48,15 @@
 
 static char *hid_types[] = {"Device", "Pointer", "Mouse", "Device", "Joystick",
                                "Gamepad", "Keyboard", "Keypad", "Multi-Axis 
Controller"};
+
+/*
+ * The global data structure for simple device driver interface.
+ */
+static DEFINE_MUTEX(matched_devices_lock);
+static DEFINE_MUTEX(simple_drivers_lock);
+static struct list_head matched_devices_list;
+static struct list_head simple_drivers_list;
+
 /*
  * Module parameters.
  */
@@ -818,8 +829,13 @@ static __inline__ int search(__s32 *arra
 static void hid_process_event(struct hid_device *hid, struct hid_field *field, 
struct hid_usage *usage, __s32 value, int interrupt)
 {
        hid_dump_input(usage, value);
-       if (hid->claimed & HID_CLAIMED_INPUT)
-               hidinput_hid_event(hid, field, usage, value);
+       if (hid->claimed & HID_CLAIMED_INPUT) {
+               if (!hidinput_simple_event_filter(hid, field, usage, value))
+                       return;
+               hidinput_hid_event(hid, field, usage, value);
+               hidinput_simple_event_post(hid, field, usage, value);
+       }
+
        if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt)
                hiddev_hid_event(hid, field, usage, value);
 }
@@ -2097,8 +2113,32 @@ static void hid_disconnect(struct usb_in
        del_timer_sync(&hid->io_retry);
        flush_scheduled_work();
 
-       if (hid->claimed & HID_CLAIMED_INPUT)
+       if (hid->claimed & HID_CLAIMED_INPUT) {
+               struct list_head *node;
+               struct matched_device *matched = NULL;
+               struct hidinput_simple_driver *simple = hid->simple;
+
+               mutex_lock(&matched_devices_lock);
+               list_for_each(node, &matched_devices_list) {
+                       matched = list_entry(node, struct matched_device, node);
+                       if (matched->intf == intf) {
+                               list_del(&matched->node);
+                               break;
+                       }
+                       matched = NULL;
+               }
+               mutex_unlock(&matched_devices_lock);
+               /* disconnect simple device driver if need */
+               if (matched && simple) {
+                       hidinput_simple_driver_disconnect(hid, matched);
+                       module_put(simple->owner);
+               }
+               if (matched) {
+                       matched->intf = NULL;
+                       kfree(matched);
+               }
                hidinput_disconnect(hid);
+       }
        if (hid->claimed & HID_CLAIMED_HIDDEV)
                hiddev_disconnect(hid);
 
@@ -2111,6 +2151,139 @@ static void hid_disconnect(struct usb_in
        hid_free_device(hid);
 }
 
+#ifdef CONFIG_HID_SIMPLE
+static int hidinput_simple_driver_bind_one(struct hidinput_simple_driver 
*simple,
+                                               struct hid_device *hid,
+                                               struct matched_device *matched,
+                                                               int reload)
+{
+       int ret;
+
+       if (!try_module_get(simple->owner))
+               return -ENODEV;
+       /*
+        * If the simple driver register itself after device insert,
+        * we must send hotplug message to userspace again, elsewise,
+        * we will break down some applications.
+        */
+       if (reload && hidinput_disconnect_core(hid)) {
+               module_put(simple->owner);
+               return -ENODEV;
+       }
+       ret = hidinput_simple_driver_connect(simple, hid, matched);
+
+       if (reload)
+               hidinput_reconnect_core(hid); /* To activate this input_dev */
+       if (!ret)
+               printk(KERN_INFO "The simple driver \'%s\' attach"
+                       " to the device \'%s\'\n", simple->name, hid->name);
+       else
+               module_put(simple->owner);
+       return 0;
+}
+
+/* Only be called in hid_probe(), so we just use the hid of matched->intf. */
+static void hidinput_simple_driver_bind_foreach_simple(
+                                               struct matched_device *matched)
+{
+       struct hidinput_simple_driver *simple;
+       struct list_head *node;
+       struct hid_device *hid;
+       
+       if (!matched || !matched->intf) /* should not get here */
+               return;
+       hid = usb_get_intfdata (matched->intf);
+       if (!hid || hid->simple)
+               return;
+
+       mutex_lock(&simple_drivers_lock);
+       list_for_each(node, &simple_drivers_list) {
+               simple = list_entry(node, struct hidinput_simple_driver, node);
+               if (usb_match_id(matched->intf, simple->id_table)) {
+                       if (!hidinput_simple_driver_bind_one(simple, hid, 
matched, 0))
+                               break;
+               }
+       }
+       mutex_unlock(&simple_drivers_lock);
+}
+
+static void hidinput_simple_driver_bind_foreach_matched(
+                                       struct hidinput_simple_driver *simple)
+{
+       struct list_head *node=NULL;
+       struct matched_device *matched;
+       struct hid_device *hid=NULL;
+
+       if (!simple)
+               return;
+
+       mutex_lock(&matched_devices_lock);
+       list_for_each(node, &matched_devices_list) {
+               matched = list_entry(node, struct matched_device, node);
+               hid = usb_get_intfdata (matched->intf);
+               if (!hid || hid->simple)
+                       continue;
+               if (!usb_match_id(matched->intf, simple->id_table))
+                       continue;
+               if (!hidinput_simple_driver_bind_one(simple, hid, matched, 1))
+                       break;
+       }
+       mutex_unlock(&matched_devices_lock);
+}
+
+static void hidinput_simple_driver_bind_foreach(void)
+{
+       struct hidinput_simple_driver *simple;
+       struct matched_device *matched = NULL;
+       struct list_head *matched_node = NULL, *simple_node = NULL;
+       struct hid_device *hid = NULL;
+
+       mutex_lock(&matched_devices_lock);
+       list_for_each(matched_node, &matched_devices_list) {
+               matched = list_entry(matched_node, struct matched_device, node);
+               hid = usb_get_intfdata(matched->intf);
+               if (!hid || hid->simple)
+                       continue;
+               mutex_lock(&simple_drivers_lock);
+               list_for_each(simple_node, &simple_drivers_list) {
+                       simple = list_entry(simple_node, struct 
hidinput_simple_driver, node);
+                       if (!usb_match_id(matched->intf, simple->id_table))
+                               continue;
+                       hidinput_simple_driver_bind_one(simple, hid, matched, 
1);
+               }
+               mutex_unlock(&simple_drivers_lock);
+       }
+       mutex_unlock(&matched_devices_lock);
+}
+
+int hidinput_register_simple_driver(struct hidinput_simple_driver *simple)
+{
+       if (!simple || !simple->name)
+               return -EINVAL;
+
+       hidinput_simple_driver_init(simple);
+       hidinput_simple_driver_bind_foreach_matched(simple);
+
+       mutex_lock(&simple_drivers_lock);
+       list_add(&simple->node, &simple_drivers_list);
+       mutex_unlock(&simple_drivers_lock);
+
+       return 0;
+}
+EXPORT_SYMBOL_GPL(hidinput_register_simple_driver);
+
+void hidinput_unregister_simple_driver(struct hidinput_simple_driver *simple)
+{
+       hidinput_simple_driver_clear(simple);
+       mutex_lock(&simple_drivers_lock);
+       list_del(&simple->node);
+       mutex_unlock(&simple_drivers_lock);
+       /* to active simple device driver that it is waiting */
+       hidinput_simple_driver_bind_foreach();
+}
+EXPORT_SYMBOL_GPL(hidinput_unregister_simple_driver);
+#endif
+
 static int hid_probe(struct usb_interface *intf, const struct usb_device_id 
*id)
 {
        struct hid_device *hid;
@@ -2127,15 +2300,25 @@ static int hid_probe(struct usb_interfac
        hid_init_reports(hid);
        hid_dump_device(hid);
 
-       if (!hidinput_connect(hid))
+       usb_set_intfdata(intf, hid);
+
+       if (!hidinput_connect(hid)) {
+               struct matched_device *matched;
+               matched = kmalloc(sizeof(struct matched_device), GFP_KERNEL);
+               if (matched) {
+                       matched->intf = intf;
+                       mutex_lock(&matched_devices_lock);
+                       list_add(&matched->node, &matched_devices_list);
+                       mutex_unlock(&matched_devices_lock);
+                       hidinput_simple_driver_bind_foreach_simple(matched);
+               }
                hid->claimed |= HID_CLAIMED_INPUT;
+       }
        if (!hiddev_connect(hid))
                hid->claimed |= HID_CLAIMED_HIDDEV;
 
-       usb_set_intfdata(intf, hid);
-
        if (!hid->claimed) {
-               printk ("HID device not claimed by input or hiddev\n");
+               printk (KERN_INFO "HID device not claimed by input or 
hiddev\n");
                hid_disconnect(intf);
                return -ENODEV;
        }
@@ -2234,6 +2417,8 @@ static int __init hid_init(void)
        retval = hiddev_init();
        if (retval)
                goto hiddev_init_fail;
+       INIT_LIST_HEAD(&matched_devices_list);
+       INIT_LIST_HEAD(&simple_drivers_list);
        retval = usb_register(&hid_driver);
        if (retval)
                goto usb_register_fail;
@@ -2248,7 +2433,15 @@ hiddev_init_fail:
 
 static void __exit hid_exit(void)
 {
+       struct list_head *node, *tmp;
+       struct matched_device *matched;
+
        usb_deregister(&hid_driver);
+       list_for_each_safe(node, tmp, &matched_devices_list) {
+               matched = list_entry(node, struct matched_device, node);
+               list_del(&matched->node);
+               kfree(matched);
+       }
        hiddev_exit();
 }
 
diff -Naurp linux-2.6.19.orig/drivers/usb/input/hid.h 
linux-2.6.19/drivers/usb/input/hid.h
--- linux-2.6.19.orig/drivers/usb/input/hid.h   2006-11-30 05:57:37.000000000 
+0800
+++ linux-2.6.19/drivers/usb/input/hid.h        2006-12-05 18:11:05.000000000 
+0800
@@ -33,7 +33,7 @@
 #include <linux/list.h>
 #include <linux/timer.h>
 #include <linux/workqueue.h>
-
+#include <linux/mutex.h>
 /*
  * USB HID (Human Interface Device) interface class code
  */
@@ -390,8 +390,15 @@ struct hid_input {
        struct list_head list;
        struct hid_report *report;
        struct input_dev *input;
+       unsigned long input_lock;       /* To protect accessing input_dev from
+                                        * hid-input processing. But it not 
+                                        * necessary for accessing this 
input_dev 
+                                        * instance from input subsystem. */
+       void *private;
 };
 
+struct hidinput_simple_driver;
+
 struct hid_device {                                                    /* 
device report descriptor */
         __u8 *rdesc;
        unsigned rsize;
@@ -450,6 +457,8 @@ struct hid_device {                                         
        /* device repo
        char phys[64];                                                  /* 
Device physical location */
        char uniq[64];                                                  /* 
Device unique identifier (serial #) */
 
+       struct hidinput_simple_driver *simple;
+
 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
        unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
        unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
@@ -504,12 +513,16 @@ extern void hidinput_hid_event(struct hi
 extern void hidinput_report_event(struct hid_device *hid, struct hid_report 
*report);
 extern int hidinput_connect(struct hid_device *);
 extern void hidinput_disconnect(struct hid_device *);
+extern void hidinput_reconnect_core(struct hid_device *);
+extern int hidinput_disconnect_core(struct hid_device *);
 #else
 #define IS_INPUT_APPLICATION(a) (0)
 static inline void hidinput_hid_event(struct hid_device *hid, struct hid_field 
*field, struct hid_usage *usage, __s32 value) { }
 static inline void hidinput_report_event(struct hid_device *hid, struct 
hid_report *report) { }
 static inline int hidinput_connect(struct hid_device *hid) { return -ENODEV; }
 static inline void hidinput_disconnect(struct hid_device *hid) { }
+static inline void hidinput_reconnect_core(struct hid_device *hid) { }
+static inline int hidinput_disconnect_core(struct hid_device *hid) { return 
-ENODEV; }
 #endif
 
 int hid_open(struct hid_device *);
diff -Naurp linux-2.6.19.orig/drivers/usb/input/hid-input.c 
linux-2.6.19/drivers/usb/input/hid-input.c
--- linux-2.6.19.orig/drivers/usb/input/hid-input.c     2006-11-30 
05:57:37.000000000 +0800
+++ linux-2.6.19/drivers/usb/input/hid-input.c  2006-12-05 18:15:41.000000000 
+0800
@@ -29,12 +29,13 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/kernel.h>
+#include <linux/spinlock.h>
 #include <linux/usb/input.h>
 
 #undef DEBUG
 
 #include "hid.h"
-
+#include "hid-simple.h"
 #define unk    KEY_UNKNOWN
 
 static const unsigned char hid_keyboard[256] = {
@@ -61,6 +62,8 @@ static const struct {
        __s32 y;
 }  hid_hat_to_axis[] = {{ 0, 0}, { 0,-1}, { 1,-1}, { 1, 0}, { 1, 1}, { 0, 1}, 
{-1, 1}, {-1, 0}, {-1,-1}};
 
+typedef void (*do_usage_t)(struct hid_field *, struct hid_usage *);
+
 #define map_abs(c)     do { usage->code = c; usage->type = EV_ABS; bit = 
input->absbit; max = ABS_MAX; } while (0)
 #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)
@@ -69,6 +72,15 @@ static const struct {
 #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)
 
+static inline void hidinput_send_event(struct hid_input *hidinput, int type,
+                                                       int code, int value)
+{
+       if (!hidinput_trylock_simple(hidinput)) {
+               input_event(hidinput->input, type, code, value);
+               hidinput_unlock_simple(hidinput);
+       }
+}
+
 #ifdef CONFIG_USB_HIDINPUT_POWERBOOK
 
 struct hidinput_key_translation {
@@ -144,7 +156,7 @@ static struct hidinput_key_translation *
        return NULL;
 }
 
-static int hidinput_pb_event(struct hid_device *hid, struct input_dev *input,
+static int hidinput_pb_event(struct hid_device *hid, struct hid_input 
*hidinput,
                             struct hid_usage *usage, __s32 value)
 {
        struct hidinput_key_translation *trans;
@@ -153,7 +165,7 @@ static int hidinput_pb_event(struct hid_
                if (value) hid->quirks |=  HID_QUIRK_POWERBOOK_FN_ON;
                else       hid->quirks &= ~HID_QUIRK_POWERBOOK_FN_ON;
 
-               input_event(input, usage->type, usage->code, value);
+               hidinput_send_event(hidinput, usage->type, usage->code, value);
 
                return 1;
        }
@@ -178,12 +190,14 @@ static int hidinput_pb_event(struct hid_
                                else
                                        clear_bit(usage->code, 
hid->pb_pressed_fn);
 
-                               input_event(input, usage->type, trans->to, 
value);
+                               hidinput_send_event(hidinput, usage->type, 
trans->to, value);
 
                                return 1;
                        }
                }
 
+               if (hidinput_trylock_simple(hidinput))
+                       return 0;
                if (test_bit(usage->code, hid->pb_pressed_numlock) ||
                    test_bit(LED_NUML, input->led)) {
                        trans = find_translation(powerbook_numlock_keys, 
usage->code);
@@ -194,11 +208,12 @@ static int hidinput_pb_event(struct hid_
                                else
                                        clear_bit(usage->code, 
hid->pb_pressed_numlock);
 
-                               input_event(input, usage->type, trans->to, 
value);
+                               input_event(hidinput->input, usage->type, 
trans->to, value);
                        }
-
+                       hidinput_unlock_simple(hidinput);
                        return 1;
                }
+               hidinput_unlock_simple(hidinput);
        }
 
        if (hid->quirks & HID_QUIRK_POWERBOOK_ISO_KEYBOARD) {
@@ -229,7 +244,7 @@ static void hidinput_pb_setup(struct inp
                set_bit(trans->to, input->keybit);
 }
 #else
-static inline int hidinput_pb_event(struct hid_device *hid, struct input_dev 
*input,
+static inline int hidinput_pb_event(struct hid_device *hid, struct hid_input 
*hidinput,
                                    struct hid_usage *usage, __s32 value)
 {
        return 0;
@@ -240,16 +255,13 @@ static inline void hidinput_pb_setup(str
 }
 #endif
 
-static void hidinput_configure_usage(struct hid_input *hidinput, struct 
hid_field *field,
+static void hidinput_configure_usage(struct input_dev *input, struct hid_field 
*field,
                                     struct hid_usage *usage)
 {
-       struct input_dev *input = hidinput->input;
        struct hid_device *device = input->private;
        int max = 0, code;
        unsigned long *bit = NULL;
 
-       field->hidinput = hidinput;
-
 #ifdef DEBUG
        printk(KERN_DEBUG "Mapping: ");
        resolv_usage(usage->hid);
@@ -632,6 +644,7 @@ ignore:
 
 void hidinput_hid_event(struct hid_device *hid, struct hid_field *field, 
struct hid_usage *usage, __s32 value)
 {
+       struct hid_input *hidinput;
        struct input_dev *input;
        int *quirks = &hid->quirks;
 
@@ -643,6 +656,8 @@ void hidinput_hid_event(struct hid_devic
        if (!usage->type)
                return;
 
+       hidinput = field->hidinput;
+
        if (((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_5) && (usage->hid == 
0x00090005))
                || ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_7) && 
(usage->hid == 0x00090007))) {
                if (value) hid->quirks |=  HID_QUIRK_2WHEEL_MOUSE_HACK_ON;
@@ -651,16 +666,16 @@ void hidinput_hid_event(struct hid_devic
        }
 
        if ((hid->quirks & HID_QUIRK_INVERT_HWHEEL) && (usage->code == 
REL_HWHEEL)) {
-               input_event(input, usage->type, usage->code, -value);
+               hidinput_send_event(hidinput, usage->type, usage->code, -value);
                return;
        }
 
        if ((hid->quirks & HID_QUIRK_2WHEEL_MOUSE_HACK_ON) && (usage->code == 
REL_WHEEL)) {
-               input_event(input, usage->type, REL_HWHEEL, value);
+               hidinput_send_event(hidinput, usage->type, REL_HWHEEL, value);
                return;
        }
 
-       if ((hid->quirks & HID_QUIRK_POWERBOOK_HAS_FN) && 
hidinput_pb_event(hid, input, usage, value))
+       if ((hid->quirks & HID_QUIRK_POWERBOOK_HAS_FN) && 
hidinput_pb_event(hid, hidinput, usage, value))
                return;
 
        if (usage->hat_min < usage->hat_max || usage->hat_dir) {
@@ -668,8 +683,8 @@ void hidinput_hid_event(struct hid_devic
                if (!hat_dir)
                        hat_dir = (value - usage->hat_min) * 8 / 
(usage->hat_max - usage->hat_min + 1) + 1;
                if (hat_dir < 0 || hat_dir > 8) hat_dir = 0;
-               input_event(input, usage->type, usage->code    , 
hid_hat_to_axis[hat_dir].x);
-                input_event(input, usage->type, usage->code + 1, 
hid_hat_to_axis[hat_dir].y);
+               hidinput_send_event(hidinput, usage->type, usage->code    , 
hid_hat_to_axis[hat_dir].x);
+                hidinput_send_event(hidinput, usage->type, usage->code + 1, 
hid_hat_to_axis[hat_dir].y);
                 return;
         }
 
@@ -680,18 +695,18 @@ void hidinput_hid_event(struct hid_devic
 
        if (usage->hid == (HID_UP_DIGITIZER | 0x0032)) { /* InRange */
                if (value) {
-                       input_event(input, usage->type, (*quirks & 
HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
+                       hidinput_send_event(hidinput, usage->type, (*quirks & 
HID_QUIRK_INVERT) ? BTN_TOOL_RUBBER : usage->code, 1);
                        return;
                }
-               input_event(input, usage->type, usage->code, 0);
-               input_event(input, usage->type, BTN_TOOL_RUBBER, 0);
+               hidinput_send_event(hidinput, usage->type, usage->code, 0);
+               hidinput_send_event(hidinput, usage->type, BTN_TOOL_RUBBER, 0);
                return;
        }
 
        if (usage->hid == (HID_UP_DIGITIZER | 0x0030) && (*quirks & 
HID_QUIRK_NOTOUCH)) { /* Pressure */
                int a = field->logical_minimum;
                int b = field->logical_maximum;
-               input_event(input, EV_KEY, BTN_TOUCH, value > a + ((b - a) >> 
3));
+               hidinput_send_event(hidinput, EV_KEY, BTN_TOUCH, value > a + 
((b - a) >> 3));
        }
 
        if (usage->hid == (HID_UP_PID | 0x83UL)) { /* Simultaneous Effects Max 
*/
@@ -707,18 +722,22 @@ void hidinput_hid_event(struct hid_devic
        if ((usage->type == EV_KEY) && (usage->code == 0)) /* Key 0 is 
"unassigned", not KEY_UNKNOWN */
                return;
 
-       input_event(input, usage->type, usage->code, value);
+       hidinput_send_event(hidinput, usage->type, usage->code, value);
 
        if ((field->flags & HID_MAIN_ITEM_RELATIVE) && (usage->type == EV_KEY))
-               input_event(input, usage->type, usage->code, 0);
+               hidinput_send_event(hidinput, usage->type, usage->code, 0);
 }
 
 void hidinput_report_event(struct hid_device *hid, struct hid_report *report)
 {
-       struct hid_input *hidinput;
+       struct hid_input *hidinput = NULL;
 
-       list_for_each_entry(hidinput, &hid->inputs, list)
+       list_for_each_entry(hidinput, &hid->inputs, list) {
+               if (hidinput_trylock_simple(hidinput))
+                       continue;
                input_sync(hidinput->input);
+               hidinput_unlock_simple(hidinput);
+       }
 }
 
 static int hidinput_find_field(struct hid_device *hid, unsigned int type, 
unsigned int code, struct hid_field **field)
@@ -763,15 +782,41 @@ static int hidinput_input_event(struct i
 static int hidinput_open(struct input_dev *dev)
 {
        struct hid_device *hid = dev->private;
-       return hid_open(hid);
+       int ret = 0;
+
+       if (hid && hid->simple && hid->simple->open)
+               ret = hid->simple->open(dev);
+       if (!ret)
+               return hid_open(hid);
+       else
+               return ret;
 }
 
 static void hidinput_close(struct input_dev *dev)
 {
        struct hid_device *hid = dev->private;
+
+       if (hid && hid->simple && hid->simple->close)
+               hid->simple->close(dev);
        hid_close(hid);
 }
 
+static void hidinput_input_init(struct hid_device *hid, 
+                                       struct input_dev *input_dev)
+{
+       if (!hid || !input_dev)
+               return;
+       input_dev->private = hid;
+       input_dev->event = hidinput_input_event;
+       input_dev->open = hidinput_open;
+       input_dev->close = hidinput_close;
+       input_dev->name = hid->name;
+       input_dev->phys = hid->phys;
+       input_dev->uniq = hid->uniq;
+       usb_to_input_id(hid->dev, &input_dev->id);
+       input_dev->cdev.dev = &hid->intf->dev;
+       return;
+}
 /*
  * Register the input device; print a message.
  * Configure the input layer interface
@@ -780,7 +825,6 @@ static void hidinput_close(struct input_
 
 int hidinput_connect(struct hid_device *hid)
 {
-       struct usb_device *dev = hid->dev;
        struct hid_report *report;
        struct hid_input *hidinput = NULL;
        struct input_dev *input_dev;
@@ -812,26 +856,18 @@ int hidinput_connect(struct hid_device *
                                        err("Out of memory during hid input 
probe");
                                        return -1;
                                }
-
-                               input_dev->private = hid;
-                               input_dev->event = hidinput_input_event;
-                               input_dev->open = hidinput_open;
-                               input_dev->close = hidinput_close;
-
-                               input_dev->name = hid->name;
-                               input_dev->phys = hid->phys;
-                               input_dev->uniq = hid->uniq;
-                               usb_to_input_id(dev, &input_dev->id);
-                               input_dev->cdev.dev = &hid->intf->dev;
-
+                               hidinput_input_init(hid, input_dev);
+                               hidinput->input_lock = 0;
                                hidinput->input = input_dev;
                                list_add_tail(&hidinput->list, &hid->inputs);
                        }
 
-                       for (i = 0; i < report->maxfield; i++)
+                       for (i = 0; i < report->maxfield; i++) {
+                               report->field[i]->hidinput = hidinput;
                                for (j = 0; j < report->field[i]->maxusage; j++)
-                                       hidinput_configure_usage(hidinput, 
report->field[i],
+                                       
hidinput_configure_usage(hidinput->input, report->field[i],
                                                                 
report->field[i]->usage + j);
+                               }
 
                        if (hid->quirks & HID_QUIRK_MULTI_INPUT) {
                                /* This will leave hidinput NULL, so that it
@@ -856,6 +892,77 @@ int hidinput_connect(struct hid_device *
        return 0;
 }
 
+static void hidinput_setup_usage(struct hid_device *hid, 
+                                       struct input_dev *input)
+{
+       struct hid_report *report;
+       int i, j, k;
+
+       for (i = 0; i < hid->maxcollection; i++)
+               if (hid->collection[i].type == HID_COLLECTION_APPLICATION ||
+                   hid->collection[i].type == HID_COLLECTION_PHYSICAL)
+                       if (IS_INPUT_APPLICATION(hid->collection[i].usage))
+                               break;
+
+       if (i == hid->maxcollection)
+               return;
+
+       for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++)
+               list_for_each_entry(report, &hid->report_enum[k].report_list, 
list) {
+                       if (!report->maxfield)
+                               continue;
+                       for (i = 0; i < report->maxfield; i++)
+                               for (j = 0; j < report->field[i]->maxusage; j++)
+                                       hidinput_configure_usage(input, 
report->field[i],
+                                                                
report->field[i]->usage + j);
+               }
+       return;
+}
+
+/*
+ *  The caller must be call hidinput_reconnect() soon, 
+ *  this function hold hidinput->input_lock.
+ */
+int hidinput_disconnect_core(struct hid_device *hid)
+{
+       struct hid_input *hidinput, *next;
+       struct input_dev *input_dev = NULL;
+       struct list_head tmp_list;
+
+       INIT_LIST_HEAD(&tmp_list);
+       list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+               input_dev = input_allocate_device();
+               if (!input_dev)
+                       break;
+               list_add_tail(&input_dev->node, &tmp_list);
+       }
+       while (!list_empty(&tmp_list)) {
+               list_del_init(tmp_list.next);
+       }
+       if (!input_dev)
+               return -ENOMEM;
+       list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+               hidinput_input_init(hid, input_dev);
+               hidinput_lock_simple(hidinput);
+               input_unregister_device(hidinput->input);
+               hidinput->input = input_dev;
+               if (!(hid->quirks&HID_QUIRK_MULTI_INPUT))
+                       hid_ff_init(hid);
+       }
+       return 0;
+}
+
+void hidinput_reconnect_core(struct hid_device *hid)
+{
+       struct hid_input *hidinput, *next;
+
+       list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+               hidinput_setup_usage(hid, hidinput->input);
+               input_register_device(hidinput->input);
+               hidinput_unlock_simple(hidinput);
+       }
+}
+
 void hidinput_disconnect(struct hid_device *hid)
 {
        struct hid_input *hidinput, *next;
diff -Naurp linux-2.6.19.orig/drivers/usb/input/hid-simple.c 
linux-2.6.19/drivers/usb/input/hid-simple.c
--- linux-2.6.19.orig/drivers/usb/input/hid-simple.c    1970-01-01 
08:00:00.000000000 +0800
+++ linux-2.6.19/drivers/usb/input/hid-simple.c 2006-12-06 17:42:14.000000000 
+0800
@@ -0,0 +1,326 @@
+/*
+ *  HID Simple Driver Interface v0.4.1
+ * 
+ *  Copyright (c) 2006 Li Yu <[EMAIL PROTECTED]>
+ */
+
+/*
+ * 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
+ *
+ * Should you need to contact me, the author, you can do so either by
+ * e-mail - mail your message to <[EMAIL PROTECTED]>, or by paper mail:
+ * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/input.h>
+
+#include "hid.h"
+#include "hid-simple.h"
+
+typedef void (*do_usage_t)(struct hid_field *, struct hid_usage *);
+
+int hidinput_simple_driver_init(struct hidinput_simple_driver *simple)
+{
+       if (unlikely(!simple))
+               return -EINVAL;
+       INIT_LIST_HEAD(&simple->node);
+       INIT_LIST_HEAD(&simple->raw_devices);
+       simple->flags = 0;
+       return 0;
+}
+
+static void inline hidinput_simple_configure_one_usage(int op, 
+                                               struct input_dev *input,
+                                               struct hid_usage *usage,
+                                               struct usage_block *usage_block)
+{
+       unsigned long *bits;
+       int flag;
+       struct hid_device *hid;
+
+       hid = input->private;
+       switch (usage_block->event) {
+       case EV_KEY:
+               flag = HIDINPUT_SIMPLE_KEYBIT;
+               bits = input->keybit;
+               break;
+       case EV_REL:
+               flag = HIDINPUT_SIMPLE_RELBIT;
+               bits = input->relbit;
+               break;
+       case EV_ABS:
+               flag = HIDINPUT_SIMPLE_ABSBIT;
+               bits = input->relbit;
+               break;
+       case EV_MSC:
+               flag = HIDINPUT_SIMPLE_MSCBIT;
+               bits = input->absbit;
+               break;
+       case EV_SW:
+               flag = HIDINPUT_SIMPLE_SWBIT;
+               bits = input->swbit;
+               break;
+       case EV_LED:
+               flag = HIDINPUT_SIMPLE_LEDBIT;
+               bits = input->ledbit;
+               break;
+       case EV_SND:
+               flag = HIDINPUT_SIMPLE_SNDBIT;
+               bits = input->sndbit;
+               break;
+       case EV_FF:
+               flag = HIDINPUT_SIMPLE_FFBIT;
+               bits = input->ffbit;
+               break;
+       case EV_FF_STATUS:
+               flag = HIDINPUT_SIMPLE_FFSTSBIT;
+               bits = NULL;
+               break;
+       default:
+               return;
+       }
+
+       if (__OP_SET_BIT == op) {
+               usage->code = usage_block->code;
+               usage->type = usage_block->event;
+               if (bits)
+                       set_bit(usage_block->code, bits);
+               /* if this event bit is set by us first, remember it */
+               if (!test_and_set_bit(usage_block->event, input->evbit))
+                       set_bit(flag, &hid->simple->flags);
+       }
+       else if (__OP_CLR_BIT == op) {
+               usage->code = 0;
+               usage->type = 0;
+               if (bits)
+                       clear_bit(usage_block->code, bits);
+               /* clear event bit, only if it's set by us. */
+               if (test_and_clear_bit(flag, &hid->simple->flags))
+                       clear_bit(usage_block->event, input->evbit);
+       }
+}
+
+static do_usage_t hidinput_simple_driver_configure_usage_prep(
+                                       struct hidinput_simple_driver *simple,
+                                                       int *op)
+{
+       do_usage_t do_usage;
+
+       if (test_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &simple->flags)) {
+               do_usage = simple->setup_usage;
+               *op = __OP_SET_BIT;
+       }
+       else {
+               do_usage = simple->clear_usage;
+               *op = __OP_CLR_BIT;
+       }
+       return do_usage;
+}
+
+static void __hidinput_simple_driver_configure_usage(
+                                       struct hidinput_simple_driver *simple,
+                                               int op,
+                                               struct hid_field *field,
+                                               struct hid_usage *hid_usage)
+{
+       struct input_dev *input = field->hidinput->input;
+       struct usage_block *usage_block;
+       struct usage_page_block *page_block;
+       int page;
+       int usage;
+
+       page = (hid_usage->hid & HID_USAGE_PAGE);
+       usage = (hid_usage->hid & HID_USAGE);
+       page_block = simple->usage_page_table;
+       for (;page_block && page_block->usage_blockes;page_block++) {
+               if (page_block->page != page)
+                       continue;
+               usage_block = page_block->usage_blockes;
+               for (; usage_block && usage_block->usage; usage_block++) {
+                       if (usage_block->usage != usage)
+                               continue;
+                       hidinput_simple_configure_one_usage(op, input, 
+                                               hid_usage, usage_block);
+               }
+       }
+}
+
+/*
+ *  To give one simple device a configure usage chance.
+ *  The framework of this function come from hidinput_connect()
+ */
+void hidinput_simple_driver_configure_usage(struct hidinput_simple_driver 
*simple,                                                     struct hid_device 
*hid)
+{
+       struct hid_report *report;
+       int i, j, k;
+       do_usage_t do_usage;
+       int op;
+
+       if (!simple)
+               return;
+       do_usage = hidinput_simple_driver_configure_usage_prep(simple, &op);
+
+       for (i = 0; i < hid->maxcollection; i++)
+               if (hid->collection[i].type == HID_COLLECTION_APPLICATION ||
+                       hid->collection[i].type==HID_COLLECTION_PHYSICAL)
+                       if (IS_INPUT_APPLICATION(hid->collection[i].usage))
+                               break;
+
+       if (i == hid->maxcollection)
+               return;
+
+       for (k = HID_INPUT_REPORT; k <= HID_OUTPUT_REPORT; k++)
+               list_for_each_entry(report, &hid->report_enum[k].report_list, 
list) {
+                       if (!report->maxfield)
+                               continue;
+
+                       for (i = 0; i < report->maxfield; i++)
+                               for (j = 0; j < report->field[i]->maxusage; 
j++) {
+                                       
__hidinput_simple_driver_configure_usage(simple, op, report->field[i], 
report->field[i]->usage + j);
+                                       if (do_usage)
+                                               do_usage(report->field[i],
+                                               report->field[i]->usage + j);
+                               }
+               }
+
+       return;
+}
+
+int hidinput_simple_driver_push(struct hid_device *hid, 
+                                       struct hidinput_simple_driver *simple,
+                                       struct matched_device *matched)
+{
+       struct raw_simple_device *raw_simple;
+
+       raw_simple = kmalloc(sizeof(struct raw_simple_device), GFP_KERNEL);
+       if (!raw_simple)
+               return -ENOMEM;
+       raw_simple->intf = matched->intf;
+       hid = usb_get_intfdata(matched->intf);
+       hid->simple = simple;
+       list_add(&raw_simple->node, &simple->raw_devices);
+       return 0;
+}
+
+void hidinput_simple_driver_pop(struct hid_device *hid,
+                                       struct matched_device *matched)
+{
+       struct list_head *node;
+       struct raw_simple_device *raw_simple=NULL;
+
+       list_for_each (node, &hid->simple->raw_devices) {
+               raw_simple = list_entry(node, struct raw_simple_device, node);
+               if (raw_simple && raw_simple->intf == matched->intf) {
+                       hid->simple = NULL;
+                       list_del(&raw_simple->node);
+                       raw_simple->intf = NULL;
+                       kfree(raw_simple);
+                       return;
+               }
+       }
+}
+
+void hidinput_simple_driver_clear(struct hidinput_simple_driver *simple)
+{
+       struct raw_simple_device *raw_simple;
+       struct hid_device *hid;
+
+       while (!list_empty_careful(&simple->raw_devices)) {
+               raw_simple = list_entry(simple->raw_devices.next, 
+                                       struct raw_simple_device, node);
+               hid = usb_get_intfdata (raw_simple->intf);
+               if (hid) {
+                       if (hid->simple)
+                               BUG_ON(hid->simple != simple);
+                       hidinput_simple_driver_disconnect(hid, NULL);
+                       hidinput_disconnect_core(hid);
+                       hidinput_reconnect_core(hid);
+                       hid->simple = NULL;
+               }
+               list_del_init(simple->raw_devices.next);
+               raw_simple->intf = NULL;
+               kfree(raw_simple);
+       }
+}
+
+int hidinput_simple_driver_connect(struct hidinput_simple_driver *simple, 
+                                               struct hid_device *hid,
+                                               struct matched_device *matched)
+{
+       struct hid_input *hidinput, *next;
+       int ret = -ENODEV;
+
+       if (!simple || !matched)
+               return -EINVAL;
+
+       if (!simple->connect) {
+               ret = 0;
+               goto exit;
+       }
+       list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+               if (!simple->connect(hid, hidinput))
+                       ret = 0;
+       }
+exit:
+       hid->simple = simple;
+       hidinput_simple_driver_setup_usage(simple, hid);
+       /* One simple driver may handle more devices */
+       if (hidinput_simple_driver_push(hid, simple, matched)) {
+               hidinput_simple_driver_disconnect(hid, NULL);
+               return -ENODEV;
+       }
+       return ret;
+}
+
+void hidinput_simple_driver_disconnect(struct hid_device *hid, 
+                                               struct matched_device *matched)
+{
+       struct hid_input *hidinput, *next;
+
+       if (!hid || !hid->simple)
+               return;
+       if (!hid->simple->disconnect)
+               goto exit;
+
+       hidinput_simple_driver_clear_usage(hid->simple, hid);
+       wmb();
+       list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+               hid->simple->disconnect(hid, hidinput);
+       }
+exit:
+       if (matched)
+               hidinput_simple_driver_pop(hid, matched);
+       return;
+}
+
+struct hid_input* hidinput_simple_inputdev_to_hidinput(struct input_dev *dev)
+{
+       struct hid_device *hid = dev->private;
+       struct list_head *iter;
+       struct hid_input *hidinput;
+
+       if (!hid)
+               return NULL;
+       list_for_each(iter, &hid->inputs) {
+               hidinput = list_entry(iter, struct hid_input, list);
+               if (hidinput->input == dev)
+                       return hidinput;
+       }
+       return NULL;
+}
+EXPORT_SYMBOL_GPL(hidinput_simple_inputdev_to_hidinput);
diff -Naurp linux-2.6.19.orig/drivers/usb/input/hid-simple.h 
linux-2.6.19/drivers/usb/input/hid-simple.h
--- linux-2.6.19.orig/drivers/usb/input/hid-simple.h    1970-01-01 
08:00:00.000000000 +0800
+++ linux-2.6.19/drivers/usb/input/hid-simple.h 2006-12-05 18:14:55.000000000 
+0800
@@ -0,0 +1,221 @@
+/*
+ *  NOTE:
+ *     For use me , you must include hid.h in your source first. 
+ */
+#ifndef __HID_SIMPLE_H
+#define __HID_SIMPLE_H
+
+#ifdef __KERNEL__
+
+#include <linux/usb.h>
+#include <asm/bitops.h>
+/***** The public interface for simple device driver *****/
+struct usage_block {
+       int usage; /* usage code */
+       int value; /* not used, for F_EVENT_BY_VALUE in future  */
+       int event; /* input event type, e.g. EV_KEY. */
+       int code;  /* input subsystem code, e.g. KEY_F1. */
+       int flags; /* not used */
+};
+
+struct usage_page_block {
+       int page; /* usage page code */
+       int flags; /* not used */
+       struct usage_block *usage_blockes;
+};
+
+/* usage_block flags list */
+#define F_EVENT_BY_VALUE (0x1) /* submit input event by usage_block.value, 
+                                 not implement yet */
+
+#define USAGE_BLOCK(i_usage, i_value, i_event, i_code, i_flags) \
+       {\
+               .usage = (i_usage),\
+               .value = (i_value),\
+               .event = (i_event),\
+               .code = (i_code),\
+               .flags = (i_flags),\
+       }
+
+#define USAGE_BLOCK_NULL {}
+
+#define USAGE_PAGE_BLOCK(i_page, i_usage_blockes) \
+       {\
+               .page = (i_page),\
+               .usage_blockes = (i_usage_blockes),\
+       }
+
+#define USAGE_PAGE_BLOCK_NULL {}
+
+#define __SIMPLE_DRIVER_INIT \
+       .owner = THIS_MODULE,
+
+struct hidinput_simple_driver {
+/* private */
+       struct list_head node; /* link with simple_drivers_list */
+       struct list_head raw_devices;
+       unsigned long flags;
+/* public */
+       struct module *owner;
+       char *name;
+       int (*connect)(struct hid_device *, struct hid_input *);        
+       void (*disconnect)(struct hid_device *, struct hid_input *);
+       void (*setup_usage)(struct hid_field *,   struct hid_usage *);
+       void (*clear_usage)(struct hid_field *,   struct hid_usage *);
+       int (*pre_event)(const struct hid_device *, const struct hid_field *,
+                                       const struct hid_usage *, const __s32);
+       int (*post_event)(const struct hid_device *, const struct hid_field *,
+                                       const struct hid_usage *, const __s32);
+       int (*open)(struct input_dev *dev);
+       void (*close)(struct input_dev *dev);
+       struct usb_device_id *id_table;
+       struct usage_page_block *usage_page_table;
+       void *private;
+};
+
+int hidinput_register_simple_driver(struct hidinput_simple_driver *device);
+void hidinput_unregister_simple_driver(struct hidinput_simple_driver *device);
+struct hid_input* hidinput_simple_inputdev_to_hidinput(struct input_dev *dev);
+
+/********************* The public section end ***********/
+
+/***** The private section for simple device driver implement only *****/
+
+/* simple driver internal flags */
+#define HIDINPUT_SIMPLE_SETUP_USAGE    (0x0)
+#define HIDINPUT_SIMPLE_KEYBIT (0x1)
+#define HIDINPUT_SIMPLE_RELBIT (0x2)
+#define HIDINPUT_SIMPLE_ABSBIT (0x3)
+#define HIDINPUT_SIMPLE_MSCBIT (0x4)
+#define HIDINPUT_SIMPLE_SWBIT  (0x5)
+#define HIDINPUT_SIMPLE_LEDBIT (0x6)
+#define HIDINPUT_SIMPLE_SNDBIT (0x7)
+#define HIDINPUT_SIMPLE_FFBIT  (0x8)
+#define HIDINPUT_SIMPLE_FFSTSBIT       (0x9)
+
+/* used in hidinput_simple_driver_configure_usage() */
+#define __OP_SET_BIT (1)
+#define __OP_CLR_BIT (0)
+
+/* 
+ *  matched_device record one device which hid-subsystem handle, it may 
+ *  be one simple device can not handle.
+ *
+ *  The element of matched_device list is inserted at hidinput_connect(), 
+ *  and is removed  at hidinput_disconnect().
+ */ 
+struct matched_device {
+       struct usb_interface *intf;
+       struct list_head node;
+};
+
+/* 
+ *  raw_simple_driver record one device which hid simple device handle.
+ *  It used as one member of hid_simple_driver.
+ */ 
+
+struct raw_simple_device {
+       struct usb_interface *intf;
+       struct list_head node;
+};
+
+#ifdef CONFIG_HID_SIMPLE
+extern void hidinput_simple_driver_configure_usage(struct 
hidinput_simple_driver *simple, struct hid_device *hid);
+extern int hidinput_simple_driver_init(struct hidinput_simple_driver *simple);
+extern void hidinput_simple_driver_clear(struct hidinput_simple_driver 
*simple);
+extern int hidinput_simple_driver_connect(struct hidinput_simple_driver 
*simple, 
+                                               struct hid_device *hid,
+                                               struct matched_device *dev);
+extern void hidinput_simple_driver_disconnect(struct hid_device *hid, 
+                                               struct matched_device *dev);
+
+static void inline hidinput_lock_simple(struct hid_input *dev)
+{
+       while (!test_and_set_bit(0, &dev->input_lock))
+               schedule();
+}
+
+static int inline hidinput_trylock_simple(struct hid_input *dev)
+{
+       if (!test_and_set_bit(0, &dev->input_lock))
+               return 0;
+       return -EBUSY;
+}
+
+static void inline hidinput_unlock_simple(struct hid_input *dev)
+{
+       clear_bit(0, &dev->input_lock);
+}
+
+static inline int hidinput_simple_event_filter(struct hid_device *hid, 
+                                                       struct hid_field *field,
+                                                       struct hid_usage *usage,
+                                                       __s32 value)
+{
+       int ret;
+
+       if (!hid->simple || !hid->simple->pre_event)
+               return (!0);
+       if (hidinput_trylock_simple(field->hidinput))
+               return 0;
+       ret = hid->simple->pre_event(hid, field, usage, value);
+       hidinput_unlock_simple(field->hidinput);
+       return ret;
+}
+
+static inline void hidinput_simple_event_post(struct hid_device *hid, 
+                                                       struct hid_field *field,
+                                                       struct hid_usage *usage,
+                                                       __s32 value)
+{
+       if (!hid->simple || !hid->simple->post_event)
+               return;
+       if (hidinput_trylock_simple(field->hidinput))
+               return;
+       hid->simple->post_event(hid, field, usage, value);
+       hidinput_unlock_simple(field->hidinput);
+}
+
+static inline void hidinput_simple_driver_setup_usage(struct 
hidinput_simple_driver *simple, struct hid_device *hid)
+{
+       if (simple) {
+               set_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &simple->flags);
+               hidinput_simple_driver_configure_usage(simple, hid);
+       }
+}
+
+static void inline hidinput_simple_driver_clear_usage(struct 
hidinput_simple_driver *simple, struct hid_device *hid)
+{
+       if (simple) {
+               clear_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &simple->flags);
+               hidinput_simple_driver_configure_usage(simple, hid);
+       }
+}
+
+#else /* CONFIG_HID_SIMPLE */
+static inline void hidinput_simple_driver_bind_foreach_simple(
+                                       struct matched_device *matched) {}
+static inline void hidinput_simple_driver_configure_usage(struct hid_device 
*hid)
+{}
+static inline int hidinput_simple_driver_init(struct hidinput_simple_driver 
*simple)
+{
+       return 0;
+}
+static inline void hidinput_simple_driver_clear(
+                               struct hidinput_simple_driver *simple) {}
+static inline int hidinput_simple_driver_connect(
+                                       struct hidinput_simple_driver *simple,
+                                               struct hid_device *hid,
+                                               struct matched_device *dev)
+{
+       return 0;
+}
+static inline void hidinput_simple_driver_disconnect(struct hid_device *hid, 
+                                               struct matched_device *dev) {}
+static inline void hidinput_simple_driver_setup_usage(struct hid_device *hid) 
{}
+static inline void hidinput_simple_driver_clear_usage(struct hid_device *hid) 
{}
+static void inline hidinput_simple_driver_ff_init(struct input_dev *input_dev) 
{}
+#endif
+/***** The private section end.  *****/
+#endif /* __KERNEL__ */
+#endif /* __HID_SIMPLE_H */
diff -Naurp linux-2.6.19.orig/drivers/usb/input/Kconfig 
linux-2.6.19/drivers/usb/input/Kconfig
--- linux-2.6.19.orig/drivers/usb/input/Kconfig 2006-11-30 05:57:37.000000000 
+0800
+++ linux-2.6.19/drivers/usb/input/Kconfig      2006-12-06 17:41:21.000000000 
+0800
@@ -348,3 +348,20 @@ config USB_APPLETOUCH
 
          To compile this driver as a module, choose M here: the
          module will be called appletouch.
+
+config HID_SIMPLE
+       bool "HID simple driver interface"
+       depends on USB_HIDINPUT
+       help
+         This simple interface let the writing HID driver more easier. 
Moreover,
+         this allow you write force-feedback driver without touch HID input 
+         implementation code. Also, it can be used as input filter.
+
+config HID_SIMPLE_MSNEK4K
+       tristate "Microsoft Natural Ergonomic Keyboard 4000 Driver"
+       depends on HID_SIMPLE
+       help
+         Microsoft Natural Ergonomic Keyboard 4000 extend keys support. These
+         may not work without change user space configration, e.g, XKB
+         configuration in X.
+
diff -Naurp linux-2.6.19.orig/drivers/usb/input/Makefile 
linux-2.6.19/drivers/usb/input/Makefile
--- linux-2.6.19.orig/drivers/usb/input/Makefile        2006-11-30 
05:57:37.000000000 +0800
+++ linux-2.6.19/drivers/usb/input/Makefile     2006-12-06 17:44:14.000000000 
+0800
@@ -29,6 +29,9 @@ endif
 ifeq ($(CONFIG_HID_FF),y)
        usbhid-objs     += hid-ff.o
 endif
+ifeq ($(CONFIG_HID_SIMPLE),y)
+       usbhid-objs     += hid-simple.o
+endif
 
 obj-$(CONFIG_USB_AIPTEK)       += aiptek.o
 obj-$(CONFIG_USB_ATI_REMOTE)   += ati_remote.o
@@ -48,6 +51,7 @@ obj-$(CONFIG_USB_ACECAD)      += acecad.o
 obj-$(CONFIG_USB_YEALINK)      += yealink.o
 obj-$(CONFIG_USB_XPAD)         += xpad.o
 obj-$(CONFIG_USB_APPLETOUCH)   += appletouch.o
+obj-$(CONFIG_HID_SIMPLE_MSNEK4K)       += usbnek4k.o
 
 ifeq ($(CONFIG_USB_DEBUG),y)
 EXTRA_CFLAGS += -DDEBUG

-
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