/*
* USB HID quirks support for Linux
*
* Copyright (c) 1999 Andreas Gal
* Copyright (c) 2000-2005 Vojtech Pavlik <vojtech@suse.cz>
* Copyright (c) 2005 Michael Haboustak <mike-@cinci.rr.com> for Concept2, Inc
* Copyright (c) 2006-2007 Jiri Kosina
* Copyright (c) 2007 Paul Walmsley
*/
/*
* 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.
*/
#include <linux/hid.h>
#include "../hid-ids.h"
/*
* Alphabetically sorted blacklist by quirk type.
*/
static const struct hid_blacklist {
__u16 idVendor;
__u16 idProduct;
__u32 quirks;
} hid_blacklist[] = {
{ USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_GAMEPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_AASHIMA, USB_DEVICE_ID_AASHIMA_PREDATOR, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_ALPS, USB_DEVICE_ID_IBM_GAMEPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_CHIC, USB_DEVICE_ID_CHIC_GAMEPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_DRIVING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FLYING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_HAPP, USB_DEVICE_ID_UGCI_FIGHTING, HID_QUIRK_BADPAD | HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_NATSU, USB_DEVICE_ID_NATSU_GAMEPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_NEC, USB_DEVICE_ID_NEC_USB_GAME_PAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_SAITEK, USB_DEVICE_ID_SAITEK_RUMBLEPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_TOPMAX, USB_DEVICE_ID_TOPMAX_COBRAPAD, HID_QUIRK_BADPAD },
{ USB_VENDOR_ID_AFATECH, USB_DEVICE_ID_AFATECH_AF9016, HID_QUIRK_FULLSPEED_INTERVAL },
{ USB_VENDOR_ID_PANTHERLORD, USB_DEVICE_ID_PANTHERLORD_TWIN_USB_JOYSTICK, HID_QUIRK_MULTI_INPUT | HID_QUIRK_SKIP_OUTPUT_REPORTS },
{ USB_VENDOR_ID_PLAYDOTCOM, USB_DEVICE_ID_PLAYDOTCOM_EMS_USBII, HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_UC100KM, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_CS124U, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_2PORTKVM, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVM, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_ATEN, USB_DEVICE_ID_ATEN_4PORTKVMC, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_DMI, USB_DEVICE_ID_DMI_ENC, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_ELO, USB_DEVICE_ID_ELO_TS2700, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_SUN, USB_DEVICE_ID_RARITAN_KVM_DONGLE, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_TURBOX, USB_DEVICE_ID_TURBOX_KEYBOARD, HID_QUIRK_NOGET },
{ USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_DUAL_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT | HID_QUIRK_SKIP_OUTPUT_REPORTS },
{ USB_VENDOR_ID_WISEGROUP, USB_DEVICE_ID_QUAD_USB_JOYPAD, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_WISEGROUP_LTD, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
{ USB_VENDOR_ID_WISEGROUP_LTD2, USB_DEVICE_ID_SMARTJOY_DUAL_PLUS, HID_QUIRK_NOGET | HID_QUIRK_MULTI_INPUT },
{ 0, 0 }
};
/* Dynamic HID quirks list - specified at runtime */
struct quirks_list_struct {
struct hid_blacklist hid_bl_item;
struct list_head node;
};
static LIST_HEAD(dquirks_list);
static DECLARE_RWSEM(dquirks_rwsem);
/* Runtime ("dynamic") quirks manipulation functions */
/**
* usbhid_exists_dquirk: find any dynamic quirks for a USB HID device
* @idVendor: the 16-bit USB vendor ID, in native byteorder
* @idProduct: the 16-bit USB product ID, in native byteorder
*
* Description:
* Scans dquirks_list for a matching dynamic quirk and returns
* the pointer to the relevant struct hid_blacklist if found.
* Must be called with a read lock held on dquirks_rwsem.
*
* Returns: NULL if no quirk found, struct hid_blacklist * if found.
*/
static struct hid_blacklist *usbhid_exists_dquirk(const u16 idVendor,
const u16 idProduct)
{
struct quirks_list_struct *q;
struct hid_blacklist *bl_entry = NULL;
list_for_each_entry(q, &dquirks_list, node) {
if (q->hid_bl_item.idVendor == idVendor &&
q->hid_bl_item.idProduct == idProduct) {
bl_entry = &q->hid_bl_item;
break;
}
}
if (bl_entry != NULL)
dbg_hid("Found dynamic quirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
bl_entry->quirks, bl_entry->idVendor,
bl_entry->idProduct);
return bl_entry;
}
/**
* usbhid_modify_dquirk: add/replace a HID quirk
* @idVendor: the 16-bit USB vendor ID, in native byteorder
* @idProduct: the 16-bit USB product ID, in native byteorder
* @quirks: the u32 quirks value to add/replace
*
* Description:
* If an dynamic quirk exists in memory for this (idVendor,
* idProduct) pair, replace its quirks value with what was
* provided. Otherwise, add the quirk to the dynamic quirks list.
*
* Returns: 0 OK, -error on failure.
*/
static int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct,
const u32 quirks)
{
struct quirks_list_struct *q_new, *q;
int list_edited = 0;
if (!idVendor) {
dbg_hid("Cannot add a quirk with idVendor = 0\n");
return -EINVAL;
}
q_new = kmalloc(sizeof(struct quirks_list_struct), GFP_KERNEL);
if (!q_new) {
dbg_hid("Could not allocate quirks_list_struct\n");
return -ENOMEM;
}
q_new->hid_bl_item.idVendor = idVendor;
q_new->hid_bl_item.idProduct = idProduct;
q_new->hid_bl_item.quirks = quirks;
down_write(&dquirks_rwsem);
list_for_each_entry(q, &dquirks_list, node) {
if (q->hid_bl_item.idVendor == idVendor &&
q->hid_bl_item.idProduct == idProduct) {
list_replace(&q->node, &q_new->node);
kfree(q);
list_edited = 1;
break;
}
}
if (!list_edited)
list_add_tail(&q_new->node, &dquirks_list);
up_write(&dquirks_rwsem);
return 0;
}
/**
* usbhid_remove_all_dquirks: remove all runtime HID quirks from memory
*
* Description:
* Free all memory associated with dynamic quirks - called before
* module unload.
*
*/
static void usbhid_remove_all_dquirks(void)
{
struct quirks_list_struct *q, *temp;
down_write(&dquirks_rwsem);
list_for_each_entry_safe(q, temp, &dquirks_list, node) {
list_del(&q->node);
kfree(q);
}
up_write(&dquirks_rwsem);
}
/**
* usbhid_quirks_init: apply USB HID quirks specified at module load time
*/
int usbhid_quirks_init(char **quirks_param)
{
u16 idVendor, idProduct;
u32 quirks;
int n = 0, m;
for (; quirks_param[n] && n < MAX_USBHID_BOOT_QUIRKS; n++) {
m = sscanf(quirks_param[n], "0x%hx:0x%hx:0x%x",
&idVendor, &idProduct, &quirks);
if (m != 3 ||
usbhid_modify_dquirk(idVendor, idProduct, quirks) != 0) {
printk(KERN_WARNING
"Could not parse HID quirk module param %s\n",
quirks_param[n]);
}
}
return 0;
}
/**
* usbhid_quirks_exit: release memory associated with dynamic_quirks
*
* Description:
* Release all memory associated with dynamic quirks. Called upon
* module unload.
*
* Returns: nothing
*/
void usbhid_quirks_exit(void)
{
usbhid_remove_all_dquirks();
}
/**
* usbhid_exists_squirk: return any static quirks for a USB HID device
* @idVendor: the 16-bit USB vendor ID, in native byteorder
* @idProduct: the 16-bit USB product ID, in native byteorder
*
* Description:
* Given a USB vendor ID and product ID, return a pointer to
* the hid_blacklist entry associated with that device.
*
* Returns: pointer if quirk found, or NULL if no quirks found.
*/
static const struct hid_blacklist *usbhid_exists_squirk(const u16 idVendor,
const u16 idProduct)
{
const struct hid_blacklist *bl_entry = NULL;
int n = 0;
for (; hid_blacklist[n].idVendor; n++)
if (hid_blacklist[n].idVendor == idVendor &&
hid_blacklist[n].idProduct == idProduct)
bl_entry = &hid_blacklist[n];
if (bl_entry != NULL)
dbg_hid("Found squirk 0x%x for USB HID vendor 0x%hx prod 0x%hx\n",
bl_entry->quirks, bl_entry->idVendor,
bl_entry->idProduct);
return bl_entry;
}
/**
* usbhid_lookup_quirk: return any quirks associated with a USB HID device
* @idVendor: the 16-bit USB vendor ID, in native byteorder
* @idProduct: the 16-bit USB product ID, in native byteorder
*
* Description:
* Given a USB vendor ID and product ID, return any quirks associated
* with that device.
*
* Returns: a u32 quirks value.
*/
u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct)
{
u32 quirks = 0;
const struct hid_blacklist *bl_entry = NULL;
/* NCR devices must not be queried for reports */
if (idVendor == USB_VENDOR_ID_NCR &&
idProduct >= USB_DEVICE_ID_NCR_FIRST &&
idProduct <= USB_DEVICE_ID_NCR_LAST)
return HID_QUIRK_NOGET;
down_read(&dquirks_rwsem);
bl_entry = usbhid_exists_dquirk(idVendor, idProduct);
if (!bl_entry)
bl_entry = usbhid_exists_squirk(idVendor, idProduct);
if (bl_entry)
quirks = bl_entry->quirks;
up_read(&dquirks_rwsem);
return quirks;
}
EXPORT_SYMBOL_GPL(usbhid_lookup_quirk);
