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SubjectRe: [PATCH] usb/hid: The HID Simple Driver Interface 0.3.2 (core)
On Fri, 29 Sep 2006 16:24:15 +0800 raise.sail wrote:

> Changelogs:
>
> 1. A bugfix for clear usage process.
>
> This driver requires:
> 1. [PATCH] usb: HID Simple Driver Interface 0.3.1 (Kconfig and Makefile), this patch can be used without any change.
>
> PS: Who is the maintainer of the input subsystem today? Should I forward this mail to him/her?

From the MAINTAINERS file (and cc-ed):

INPUT (KEYBOARD, MOUSE, JOYSTICK) DRIVERS
P: Dmitry Torokhov
M: dmitry.torokhov@gmail.com
M: dtor@mail.ru
L: linux-input@atrey.karlin.mff.cuni.cz
L: linux-joystick@atrey.karlin.mff.cuni.cz
T: git kernel.org:/pub/scm/linux/kernel/git/dtor/input.git
S: Maintained


> It can be applied on 2.6.18 at least.
>
> Signed-off-by: Liyu <raise.sail@gmail.com>
>
> diff -Naurp linux-2.6.18/drivers/usb/input/hid-core.c linux-2.6.18/drivers/usb/input.new/hid-core.c
> --- linux-2.6.18/drivers/usb/input/hid-core.c 2006-09-20 11:42:06.000000000 +0800
> +++ linux-2.6.18/drivers/usb/input.new/hid-core.c 2006-09-28 09:30:47.000000000 +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.
> */
> @@ -785,8 +796,18 @@ 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) {
> + /* event filter here */
> + 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))
> @@ -2031,8 +2051,33 @@ 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;
> +
> + matched = NULL;
> + 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 && hid->simple) {
> + hidinput_simple_driver_disconnect(hid);
> + module_put(hid->simple->owner);
> + 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);
>
> @@ -2045,6 +2090,141 @@ 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 ret;
> +
> + if (!try_module_get(simple->owner))
> + return -ENODEV;
> + ret = hidinput_simple_driver_connect(simple, hid);
> + if (ret)
> + goto exit_err;
> + ret = hidinput_simple_driver_push(hid, simple, matched);
> + if (ret)
> + goto exit_err;
> + hidinput_simple_driver_setup_usage(hid);
> + printk(KERN_INFO "The Simple HID driver \'%s\' attach on \'%s\'\n",
> + simple->name, hid->name);
> + goto exit;
> +exit_err:
> + module_put(simple->owner);
> +exit:
> + return ret;
> +}
> +
> +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->intf)
> + 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 (test_bit(HIDINPUT_SIMPLE_CONNECTED, &simple->flags))
> + continue;
> + if (usb_match_id(matched->intf, simple->id_table)) {
> + hidinput_simple_driver_bind_one(simple, hid, matched);
> + break;
> + }
> + }
> + mutex_unlock(&simple_drivers_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;
> + struct list_head *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->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 (test_bit(HIDINPUT_SIMPLE_CONNECTED, &simple->flags))
> + continue;
> + if (!usb_match_id(matched->intf, simple->id_table))
> + continue;
> + hidinput_simple_driver_bind_one(simple, hid, matched);
> + }
> + mutex_unlock(&simple_drivers_lock);
> + }
> + mutex_unlock(&matched_devices_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 || test_bit(HIDINPUT_SIMPLE_CONNECTED, &simple->flags))
> + 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->simple)
> + continue;
> + if (!usb_match_id(matched->intf, simple->id_table))
> + continue;
> + hidinput_simple_driver_bind_one(simple, hid, matched);
> + }
> + mutex_unlock(&matched_devices_lock);
> +}
> +
> +int hidinput_register_simple_driver(struct hidinput_simple_driver *simple)
> +{
> + if (!simple || !simple->name)
> + return -EINVAL;
> +
> + printk(KERN_INFO "The Simple HID driver \'%s\' register.\n",
> + simple->name);
> + 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)
> +{
> + printk(KERN_INFO "The Simple HID driver \'%s\' unregister.\n",
> + simple->name);
> + 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;
> @@ -2061,15 +2241,25 @@ 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;
> }
> @@ -2168,6 +2358,8 @@ 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;
> @@ -2182,7 +2374,15 @@ 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-2.6.18/drivers/usb/input/hid.h linux-2.6.18/drivers/usb/input.new/hid.h
> --- linux-2.6.18/drivers/usb/input/hid.h 2006-09-20 11:42:06.000000000 +0800
> +++ linux-2.6.18/drivers/usb/input.new/hid.h 2006-09-28 09:28:15.000000000 +0800
> @@ -389,8 +389,11 @@ 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;
> @@ -454,6 +457,8 @@ 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-2.6.18/drivers/usb/input/hid-input.c linux-2.6.18/drivers/usb/input.new/hid-input.c
> --- linux-2.6.18/drivers/usb/input/hid-input.c 2006-09-20 11:42:06.000000000 +0800
> +++ linux-2.6.18/drivers/usb/input.new/hid-input.c 2006-09-28 09:28:15.000000000 +0800
> @@ -34,7 +34,7 @@
> #undef DEBUG
>
> #include "hid.h"
> -
> +#include "hid-simple.h"
> #define unk KEY_UNKNOWN
>
> static const unsigned char hid_keyboard[256] = {
> @@ -61,6 +61,8 @@ 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)
> @@ -747,8 +749,13 @@ static int hidinput_input_event(struct i
> struct hid_field *field;
> int offset;
>
> - if (type == EV_FF)
> + if (type == EV_FF) {
> + if (hid->simple && hid->simple->ff_event) {
> + if (!hid->simple->ff_event(dev, type, code, value));
> + return 0;
> + }
> return hid_ff_event(hid, dev, type, code, value);
> + }
>
> if (type != EV_LED)
> return -1;
> @@ -767,12 +774,22 @@ 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->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->simple && hid->simple->close)
> + hid->simple->close(dev);
> hid_close(hid);
> }
>
> @@ -821,7 +838,7 @@ int hidinput_connect(struct hid_device *
> input_dev->event = hidinput_input_event;
> input_dev->open = hidinput_open;
> input_dev->close = hidinput_close;
> -
> + hidinput_simple_driver_ff_init(input_dev);
> input_dev->name = hid->name;
> input_dev->phys = hid->phys;
> input_dev->uniq = hid->uniq;
> diff -Naurp linux-2.6.18/drivers/usb/input/hid-simple.c linux-2.6.18/drivers/usb/input.new/hid-simple.c
> --- linux-2.6.18/drivers/usb/input/hid-simple.c 1970-01-01 08:00:00.000000000 +0800
> +++ linux-2.6.18/drivers/usb/input.new/hid-simple.c 2006-09-29 09:22:38.000000000 +0800
> @@ -0,0 +1,315 @@
> +/*
> + * HID Simple Driver Interface v0.3.2
> + *
> + * Copyright (c) 2006 Li Yu <raise.sail@gmail.com>
> + */
> +
> +/*
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * You should have received a copy of the GNU General Public License
> + * along with this program; if not, write to the Free Software
> + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
> + *
> + * Should you need to contact me, the author, you can do so either by
> + * e-mail - mail your message to <vojtech@ucw.cz>, 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 *drv)
> +{
> + if (unlikely(!drv))
> + return -EINVAL;
> + INIT_LIST_HEAD(&drv->node);
> + INIT_LIST_HEAD(&drv->raw_devices);
> + drv->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 hid_device *hid,
> + int *op)
> +{
> + do_usage_t do_usage;
> +
> + if (!hid->simple)
> + return NULL;
> +
> + if (test_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &hid->simple->flags)) {
> + do_usage = hid->simple->setup_usage;
> + *op = __OP_SET_BIT;
> + }
> + else {
> + do_usage = hid->simple->clear_usage;
> + *op = __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;
> +}
> +
> +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) {
> + if (hid->simple)
> + BUG_ON(hid->simple != simple);
> + hidinput_simple_driver_clear_usage(hid);
> + wmb();
> + hidinput_simple_driver_disconnect(hid);
> + hid->simple = NULL;
> + }
> + list_del_init(simple->raw_devices.next);
> + }
> +}
> +
> +int hidinput_simple_driver_connect(struct hidinput_simple_driver *simple,
> + struct hid_device *hid)
> +{
> + struct hid_input *hidinput, *next;
> + int ret = -ENODEV;
> +
> + if (!simple)
> + goto exit;
> + if (!simple->connect) {
> + ret = 0;
> + goto exit;
> + }
> +
> + list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
> + if (!simple->connect(hid, hidinput)) {
> + hid->simple = simple;
> + ret = 0;
> + }
> + }
> +exit:
> + set_bit(HIDINPUT_SIMPLE_CONNECTED, &simple->flags);
> + return ret;
> +}
> +
> +
> +void hidinput_simple_driver_disconnect(struct hid_device *hid)
> +{
> + struct hid_input *hidinput, *next;
> +
> + if (!hid || !hid->simple)
> + return;
> +
> + if (!hid->simple->disconnect)
> + goto exit;
> + list_for_each_entry_safe(hidinput, next, &hid->inputs, list) {
> + hid->simple->disconnect(hid, hidinput);
> + }
> +exit:
> + clear_bit(HIDINPUT_SIMPLE_CONNECTED, &hid->simple->flags);
> + 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;
> +
> + 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-2.6.18/drivers/usb/input/hid-simple.h linux-2.6.18/drivers/usb/input.new/hid-simple.h
> --- linux-2.6.18/drivers/usb/input/hid-simple.h 1970-01-01 08:00:00.000000000 +0800
> +++ linux-2.6.18/drivers/usb/input.new/hid-simple.h 2006-09-28 09:28:15.000000000 +0800
> @@ -0,0 +1,232 @@
> +/*
> + * 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_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,
> + 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);
> + int (*open)(struct input_dev *dev);
> + void (*close)(struct input_dev *dev);
> + int (*upload_effect)(struct input_dev *dev, struct ff_effect *effect);
> + int (*erase_effect)(struct input_dev *dev, int effect_id);
> + int (*flush)(struct input_dev *dev, struct file *file);
> + int (*ff_event)(struct input_dev *dev, int type, int code, int value);
> + 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)
> +#define HIDINPUT_SIMPLE_CONNECTED (0x1f)
> +
> +/* 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 hid_device *hid);
> +extern int hidinput_simple_driver_init(struct hidinput_simple_driver *simple);
> +extern int hidinput_simple_driver_push(struct hid_device *hid,
> + struct hidinput_simple_driver *simple,
> + struct matched_device *dev);
> +extern void hidinput_simple_driver_pop(struct hid_device *hid,
> + struct matched_device *dev);
> +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);
> +extern void hidinput_simple_driver_disconnect(struct hid_device *hid);
> +static void inline hidinput_simple_driver_setup_usage(struct hid_device *hid)
> +{
> + if (hid && hid->simple) {
> + set_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &hid->simple->flags);
> + hidinput_simple_driver_configure_usage(hid);
> + }
> +}
> +
> +static void inline hidinput_simple_driver_clear_usage(struct hid_device *hid)
> +{
> + if (hid && hid->simple) {
> + clear_bit(HIDINPUT_SIMPLE_SETUP_USAGE, &hid->simple->flags);
> + hidinput_simple_driver_configure_usage(hid);
> + }
> +}
> +
> +#ifdef CONFIG_HID_SIMPLE_FF
> +static inline int hidinput_upload_effect(struct input_dev *dev,
> + struct ff_effect *effect)
> +{
> + struct hid_device *hid;
> +
> + hid = dev->private;
> + if (hid->simple && hid->simple->upload_effect)
> + return hid->simple->upload_effect(dev, effect);
> + return 0;
> +}
> +
> +static inline int hidinput_erase_effect(struct input_dev *dev, int effect_id)
> +{
> + struct hid_device *hid;
> +
> + hid = dev->private;
> + if (hid->simple && hid->simple->erase_effect)
> + return hid->simple->erase_effect(dev, effect_id);
> + return 0;
> +}
> +
> +static inline int hidinput_flush(struct input_dev *dev, struct file *filep)
> +{
> + struct hid_device *hid;
> +
> + hid = dev->private;
> + if (hid->simple && hid->simple->flush)
> + return hid->simple->flush(dev, filep);
> + return 0;
> +}
> +
> +static void inline hidinput_simple_driver_ff_init(struct input_dev *input_dev)
> +{
> + input_dev->upload_effect = hidinput_upload_effect;
> + input_dev->erase_effect = hidinput_erase_effect;
> + input_dev->flush = hidinput_flush;
> +}
> +#else /* CONFIG_HID_SIMPLE_FF */
> +static void inline hidinput_simple_driver_ff_init(struct input_dev *input_dev) {}
> +#endif /* CONFIG_HID_SIMPLE_FF */
> +#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 int hidinput_simple_driver_push(struct hid_device *hid,
> + struct hidinput_simple_driver *simple,
> + struct matched_device *dev)
> +{
> + return 0;
> +}
> +static inline void hidinput_simple_driver_pop(struct hid_device *hid,
> + struct matched_device *dev) {}
> +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)
> +{
> + return 0;
> +}
> +static inline void hidinput_simple_driver_disconnect(struct hid_device *hid) {}
> +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 */
>
> -
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---
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