[PATCH] usb: The HID Simple Driver Interface 0.3.0

From: liyu
Date: Thu Aug 03 2006 - 06:03:59 EST

You can see one example in "[PATCH] usb: Microsoft Natural Ergonomic Keyboard 4000 Driver 0.3.0"

Changelogs: ( upto 20060803)

1. Release version 0.3.0.

Changelogs: ( upto 20060728)

1. Fixed the inline function redefine error.
2. Fixed the bug that access invalid address hidinput_simple_driver_pop().

Signed-off-by: Liyu <liyu@xxxxxxxxxxxx>

diff -Naurp linux-2.6.17.7/drivers/usb/input.orig/hid-core.c linux-2.6.17.7/drivers/usb/input/hid-core.c
--- linux-2.6.17.7/drivers/usb/input.orig/hid-core.c 2006-07-25 11:36:01.000000000 +0800
+++ linux-2.6.17.7/drivers/usb/input/hid-core.c 2006-08-03 15:44:45.000000000 +0800
@@ -4,6 +4,7 @@
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@xxxxxxx>
* Copyright (c) 2005 Michael Haboustak <mike-@xxxxxxxxxxxx> for Concept2, Inc
+ * Copyright (c) 2006 Liyu <liyu@xxxxxxxxxxxx> HID simple driver interface
*/

/*
@@ -26,6 +27,7 @@
#include <asm/byteorder.h>
#include <linux/input.h>
#include <linux/wait.h>
+#include <asm/semaphore.h>

#undef DEBUG
#undef DEBUG_DATA
@@ -33,6 +35,7 @@
#include <linux/usb.h>

#include "hid.h"
+#include "hid-simple.h"
#include <linux/hiddev.h>

/*
@@ -46,6 +49,15 @@

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 DECLARE_MUTEX(matched_lock);
+static DECLARE_MUTEX(simple_lock);
+static struct list_head matched_devices_list;
+static struct list_head simple_drivers_list;
+
/*
* Module parameters.
*/
@@ -785,8 +797,17 @@ 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, struct pt_regs *regs)
{
hid_dump_input(usage, value);
- if (hid->claimed & HID_CLAIMED_INPUT)
+ if (hid->claimed & HID_CLAIMED_INPUT) {
+ if (hid->simple) {
+ if (hid->simple->pre_event &&
+ !hid->simple->pre_event(hid, field, usage,
+ value, regs))
+ return;
+ }
hidinput_hid_event(hid, field, usage, value, regs);
+ if (hid->simple && hid->simple->post_event)
+ hid->simple->post_event(hid, field, usage, value, regs);
+ }
if (hid->claimed & HID_CLAIMED_HIDDEV && interrupt)
hiddev_hid_event(hid, field, usage, value, regs);
}
@@ -832,7 +853,6 @@ static void hid_input_field(struct hid_d
&& field->usage[field->value[n] - min].hid
&& search(value, field->value[n], count))
hid_process_event(hid, field, &field->usage[field->value[n] - min], 0, interrupt, regs);
-
if (value[n] >= min && value[n] <= max
&& field->usage[value[n] - min].hid
&& search(field->value, value[n], count))
@@ -1977,6 +1997,8 @@ fail:
static void hid_disconnect(struct usb_interface *intf)
{
struct hid_device *hid = usb_get_intfdata (intf);
+ struct list_head *node;
+ struct matched_device *matched;

if (!hid)
return;
@@ -1991,8 +2013,29 @@ 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) {
+ matched = NULL;
+ down(&matched_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;
+ }
+ up(&matched_lock);
+ /* disconnect simple device driver if need */
+ if (matched && hid->simple) {
+ hidinput_simple_driver_disconnect(hid);
+ hidinput_simple_driver_pop(hid, matched);
+ }
+ if (matched) {
+ matched->intf = NULL;
+ kfree(matched);
+ }
hidinput_disconnect(hid);
+ }
if (hid->claimed & HID_CLAIMED_HIDDEV)
hiddev_disconnect(hid);

@@ -2005,12 +2048,143 @@ static void hid_disconnect(struct usb_in
hid_free_device(hid);
}

+
+/* called when we unregister a hidinput simple device driver */
+static void
+hidinput_simple_driver_bind_foreach(void)
+{
+ struct hidinput_simple_driver *simple;
+ struct matched_device *matched=NULL;
+ struct list_head *matched_node = NULL;
+ struct list_head *simple_node = NULL;
+ struct hid_device *hid=NULL;
+
+ down(&matched_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->simple)
+ continue;
+ down(&simple_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;
+ if (hidinput_simple_driver_connect(simple, hid))
+ continue;
+ if (hidinput_simple_driver_push(hid, simple, matched))
+ continue;
+ hidinput_simple_driver_setup_usage(hid);
+ printk(KERN_INFO"The simple HID driver \'%s\' attach on"
+ "\'%s\'\n",
+ simple->name,
+ hid->name);
+ }
+ up(&simple_lock);
+ }
+ up(&matched_lock);
+
+}
+
+/* called in hid_probe() */
+static void
+hidinput_simple_driver_bind(struct matched_device *matched)
+{
+ struct hidinput_simple_driver *simple;
+ struct list_head *node;
+ struct hid_device *hid;
+
+ if (!matched->intf)
+ return;
+ hid = usb_get_intfdata (matched->intf);
+ if (hid->simple)
+ return;
+
+ simple = NULL;
+ down(&simple_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))
+ break;
+ simple = NULL;
+ }
+ up(&simple_lock);
+
+ if (!simple)
+ return;
+ if (hidinput_simple_driver_connect(simple, hid))
+ return;
+ if (hidinput_simple_driver_push(hid, simple, matched))
+ return;
+ hidinput_simple_driver_setup_usage(hid);
+
+ printk(KERN_INFO"The simple HID driver \'%s\' attach on \'%s\'\n",
+ simple->name, hid->name);
+}
+
+int
+hidinput_register_simple_driver(struct hidinput_simple_driver *simple)
+{
+ struct list_head *node=NULL;
+ struct matched_device *matched;
+ struct hid_device *hid=NULL;
+ int ret=0;
+
+ if (!simple || !simple->name)
+ return -EINVAL;
+
+ hidinput_simple_driver_init(simple);
+
+ down(&matched_lock);
+ list_for_each(node, &matched_devices_list) {
+ matched = list_entry(node, struct matched_device, node);
+ hid = usb_get_intfdata (matched->intf);
+ if (hid->simple)
+ continue;
+ if (!usb_match_id(matched->intf, simple->id_table))
+ continue;
+ if (hidinput_simple_driver_connect(simple, hid))
+ continue;
+ if (hidinput_simple_driver_push(hid, simple, matched))
+ continue;
+ hidinput_simple_driver_setup_usage(hid);
+ ret = 0;
+ printk(KERN_INFO"The simple HID driver \'%s\' attach on"
+ " \'%s\'.\n",
+ simple->name, hid->name);
+ }
+ up(&matched_lock);
+
+ down(&simple_lock);
+ list_add(&simple->node, &simple_drivers_list);
+ up(&simple_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(hidinput_register_simple_driver);
+
+void
+hidinput_unregister_simple_driver(struct hidinput_simple_driver *simple)
+{
+ hidinput_simple_driver_clear(simple);
+ down(&simple_lock);
+ list_del(&simple->node);
+ up(&simple_lock);
+ /* to active simple device driver that it is waiting */
+ hidinput_simple_driver_bind_foreach();
+ printk(KERN_INFO"The simple HID driver \'%s\' unregistered.\n",
+ simple->name);
+}
+
+EXPORT_SYMBOL_GPL(hidinput_unregister_simple_driver);
+
static int hid_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
struct hid_device *hid;
char path[64];
int i;
char *c;
+ struct matched_device *matched;

dbg("HID probe called for ifnum %d",
intf->altsetting->desc.bInterfaceNumber);
@@ -2021,13 +2195,22 @@ 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)) {
+ matched = kmalloc(sizeof(struct matched_device), GFP_KERNEL);
+ if (matched) {
+ matched->intf = intf;
+ down(&matched_lock);
+ list_add(&matched->node, &matched_devices_list);
+ up(&matched_lock);
+ hidinput_simple_driver_bind(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");
hid_disconnect(intf);
@@ -2108,6 +2291,8 @@ 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;
@@ -2122,7 +2307,15 @@ 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-2.6.17.7/drivers/usb/input.orig/hid.h linux-2.6.17.7/drivers/usb/input/hid.h
--- linux-2.6.17.7/drivers/usb/input.orig/hid.h 2006-07-25 11:36:01.000000000 +0800
+++ linux-2.6.17.7/drivers/usb/input/hid.h 2006-08-03 15:23:15.000000000 +0800
@@ -6,6 +6,7 @@
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2001 Vojtech Pavlik
+ * Copyright (c) 2006 Liyu To support simple HID device.
*/

/*
@@ -380,8 +381,11 @@ struct hid_input {
struct list_head list;
struct hid_report *report;
struct input_dev *input;
+ void *private;
};

+struct hidinput_simple_driver;
+
struct hid_device { /* device report descriptor */
__u8 *rdesc;
unsigned rsize;
@@ -445,6 +449,8 @@ struct hid_device { /* device repo
int (*ff_event)(struct hid_device *hid, struct input_dev *input,
unsigned int type, unsigned int code, int value);

+ 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)];
diff -Naurp linux-2.6.17.7/drivers/usb/input.orig/hid-input.c linux-2.6.17.7/drivers/usb/input/hid-input.c
--- linux-2.6.17.7/drivers/usb/input.orig/hid-input.c 2006-07-25 11:36:01.000000000 +0800
+++ linux-2.6.17.7/drivers/usb/input/hid-input.c 2006-08-03 17:26:48.000000000 +0800
@@ -2,6 +2,7 @@
* $Id: hid-input.c,v 1.2 2002/04/23 00:59:25 rdamazio Exp $
*
* Copyright (c) 2000-2001 Vojtech Pavlik
+ * Copyright (c) 2006 Liyu <liyu@xxxxxxxxxxxx> HID simple driver interface
*
* USB HID to Linux Input mapping
*/
@@ -36,6 +37,7 @@
#undef DEBUG

#include "hid.h"
+#include "hid-simple.h"

#define unk KEY_UNKNOWN

@@ -63,6 +65,8 @@ 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)
@@ -849,6 +853,245 @@ int hidinput_connect(struct hid_device *
return 0;
}

+int
+hidinput_simple_driver_init(struct hidinput_simple_driver *drv)
+{
+ if (unlikely(!drv))
+ return -EINVAL;
+ INIT_LIST_HEAD(&drv->node);
+ INIT_LIST_HEAD(&drv->raw_devices);
+ drv->flags = 0;
+ return 0;
+}
+
+#define SET_BIT (1)
+#define CLR_BIT (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;
+
+ switch (usage_block->event) {
+ case EV_KEY:
+ bits = input->keybit; break;
+ case EV_REL:
+ bits = input->relbit; break;
+ case EV_ABS:
+ bits = input->relbit; break;
+ case EV_MSC:
+ bits = input->absbit; break;
+ case EV_SW:
+ bits = input->swbit; break;
+ case EV_LED:
+ bits = input->ledbit; break;
+ case EV_SND:
+ bits = input->sndbit; break;
+ case EV_FF:
+ bits = input->ffbit; break;
+ default:
+ return;
+ }
+
+ if (SET_BIT == op) {
+ usage->code = usage_block->code;
+ usage->type = usage_block->event;
+ set_bit(usage_block->code, bits);
+ }
+ else if (CLR_BIT == op) {
+ usage->code = 0;
+ usage->type = 0;
+ clear_bit(usage_block->code, bits);
+ }
+}
+
+static do_usage_t
+hidinput_simple_driver_configure_usage_prep(struct hid_device *hid, int *op)
+{
+ do_usage_t do_usage;
+
+ if (!hid->simple)
+ return NULL;
+
+ if (hid->simple->flags & HIDINPUT_SIMPLE_SETUP_USAGE) {
+ do_usage = hid->simple->setup_usage;
+ *op = SET_BIT;
+ }
+ else {
+ do_usage = hid->simple->clear_usage;
+ *op = CLR_BIT;
+ }
+ return do_usage;
+}
+
+static void
+__hidinput_simple_driver_configure_usage(int op,
+ struct hid_field *field,
+ struct hid_usage *hid_usage)
+{
+ struct input_dev *input = field->hidinput->input;
+ struct hid_device *hid = input->private;
+ 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 = hid->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 hid_device *hid)
+{
+ struct hid_report *report;
+ int i, j, k;
+ do_usage_t do_usage;
+ int op;
+
+ if (!hid->simple)
+ return;
+
+ do_usage = hidinput_simple_driver_configure_usage_prep(hid, &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(
+ op,
+ report->field[i],
+ report->field[i]->usage + j);
+ if (do_usage)
+ do_usage(report->field[i],
+ report->field[i]->usage + j);
+ }
+ }
+
+ return;
+}
+#undef SET_BIT
+#undef CLR_BIT
+
+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);
+ 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->simple) {
+ BUG_ON(hid->simple != simple);
+ hid->simple = NULL;
+ }
+ hidinput_simple_driver_clear_usage(hid);
+ printk("device '%s' disconnect from one simple driver.\n",
+ hid->name);
+ hidinput_simple_driver_disconnect(hid);
+ list_del_init(simple->raw_devices.next);
+ }
+}
+
+/* modify from hidinput_disconnect() */
+int hidinput_simple_driver_connect(struct hidinput_simple_driver *simple,
+ struct hid_device *hid)
+{
+ struct hid_input *hidinput, *next;
+ int ret = -ENODEV;
+
+ if (!simple)
+ return ret;
+ if (!simple->connect)
+ return 0;
+
+ list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+ if (!simple->connect(hid, hidinput)) {
+ hid->simple = simple;
+ ret = 0;
+ }
+ }
+ return ret;
+}
+
+
+/* modify from hidinput_disconnect() */
+void hidinput_simple_driver_disconnect(struct hid_device *hid)
+{
+ struct hid_input *hidinput, *next;
+
+ if (!hid->simple || !hid->simple->disconnect)
+ return;
+
+ list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
+ hid->simple->disconnect(hid, hidinput);
+ }
+}
+
void hidinput_disconnect(struct hid_device *hid)
{
struct hid_input *hidinput, *next;
diff -Naurp linux-2.6.17.7/drivers/usb/input.orig/hid-simple.h linux-2.6.17.7/drivers/usb/input/hid-simple.h
--- linux-2.6.17.7/drivers/usb/input.orig/hid-simple.h 1970-01-01 08:00:00.000000000 +0800
+++ linux-2.6.17.7/drivers/usb/input/hid-simple.h 2006-08-03 17:27:10.000000000 +0800
@@ -0,0 +1,137 @@
+/*
+ * 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>
+
+/***** The public interface for simple device driver *****/
+struct usage_page_block;
+
+struct hidinput_simple_driver {
+/* private */
+ struct list_head node; /* link with simple_drivers_list */
+ struct list_head raw_devices;
+ int flags;
+/* public */
+ char *name;
+ int (*connect)(struct hid_device *, struct hid_input *);
+ void (*setup_usage)(struct hid_field *, struct hid_usage *);
+ int (*pre_event)(const struct hid_device *, const struct hid_field *,
+ const struct hid_usage *, const __s32,
+ const struct pt_regs *regs);
+ int (*post_event)(const struct hid_device *, const struct hid_field *,
+ const struct hid_usage *, const __s32,
+ const struct pt_regs *regs);
+ void (*clear_usage)(struct hid_field *, struct hid_usage *);
+ void (*disconnect)(struct hid_device *, struct hid_input *);
+ void *private;
+ struct usb_device_id *id_table;
+ struct usage_page_block *usage_page_table;
+};
+
+
+int hidinput_register_simple_driver(struct hidinput_simple_driver *device);
+void hidinput_unregister_simple_driver(struct hidinput_simple_driver *device);
+
+/********************* The public section end ***********/
+
+/***** The private section for simple device driver implement only *****/
+
+/*
+ * 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;
+};
+
+void hidinput_simple_driver_configure_usage(struct hid_device *hid);
+int hidinput_simple_driver_init(struct hidinput_simple_driver *simple);
+int hidinput_simple_driver_push(struct hid_device *hid,
+ struct hidinput_simple_driver *simple,
+ struct matched_device *dev);
+void hidinput_simple_driver_pop(struct hid_device *hid,
+ struct matched_device *dev);
+void hidinput_simple_driver_clear(struct hidinput_simple_driver *simple);
+int hidinput_simple_driver_connect(struct hidinput_simple_driver *simple,
+ struct hid_device *hid);
+void hidinput_simple_driver_disconnect(struct hid_device *hid);
+
+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 {}
+
+/* simple driver internal flags */
+#define HIDINPUT_SIMPLE_SETUP_USAGE (0x1) /* the reverse is to call clear_usage */
+
+static void inline hidinput_simple_driver_setup_usage(struct hid_device *hid)
+{
+ if (hid && hid->simple) {
+ hid->simple->flags |= HIDINPUT_SIMPLE_SETUP_USAGE;
+ hidinput_simple_driver_configure_usage(hid);
+ }
+}
+
+static void inline hidinput_simple_driver_clear_usage(struct hid_device *hid)
+{
+ if (hid && hid->simple) {
+ hid->simple->flags &= (~HIDINPUT_SIMPLE_SETUP_USAGE);
+ hidinput_simple_driver_configure_usage(hid);
+ }
+}
+
+/***** The private section end. *****/
+#endif /* __KERNEL__ */
+#endif /* __HID_SIMPLE_H */


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