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USB HID: add 'quirks' module parameter 

Add a 'quirks' module parameter for the usbhid module, so users can
add or modify quirks at module load time.

Signed-off-by: Paul Walmsley <paul@booyaka.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
hifive-unleashed-5.1
Paul Walmsley 2007-04-19 14:56:12 +02:00 committed by Jiri Kosina
parent 8cef908235
commit 876b9276b9
3 changed files with 59 additions and 0 deletions
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13
drivers/hid/usbhid/hid-core.c
View File

@ -53,6 +53,13 @@ static unsigned int hid_mousepoll_interval;
module_param_named(mousepoll, hid_mousepoll_interval, uint, 0644);
MODULE_PARM_DESC(mousepoll, "Polling interval of mice");
/* Quirks specified at module load time */
static char *quirks_param[MAX_USBHID_BOOT_QUIRKS] = { [ 0 ... (MAX_USBHID_BOOT_QUIRKS - 1) ] = NULL };
module_param_array_named(quirks, quirks_param, charp, NULL, 0444);
MODULE_PARM_DESC(quirks, "Add/modify USB HID quirks by specifying "
" quirks=vendorID:productID:quirks"
" where vendorID, productID, and quirks are all in"
" 0x-prefixed hex");
/*
* Input submission and I/O error handler.
*/
@ -1072,6 +1079,9 @@ static struct usb_driver hid_driver = {
static int __init hid_init(void)
{
int retval;
retval = usbhid_quirks_init(quirks_param);
if (retval)
goto usbhid_quirks_init_fail;
retval = hiddev_init();
if (retval)
goto hiddev_init_fail;
@ -1084,6 +1094,8 @@ static int __init hid_init(void)
usb_register_fail:
hiddev_exit();
hiddev_init_fail:
usbhid_quirks_exit();
usbhid_quirks_init_fail:
return retval;
}
@ -1091,6 +1103,7 @@ static void __exit hid_exit(void)
{
usb_deregister(&hid_driver);
hiddev_exit();
usbhid_quirks_exit();
}
module_init(hid_init);

38
drivers/hid/usbhid/hid-quirks.c
View File

@ -576,6 +576,44 @@ static void usbhid_remove_all_dquirks(void)
}
/**
* 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

8
include/linux/hid.h
View File

@ -247,6 +247,11 @@ struct hid_item {
* HID device quirks.
*/
/*
* Increase this if you need to configure more HID quirks at module load time
*/
#define MAX_USBHID_BOOT_QUIRKS 4
#define HID_QUIRK_INVERT 0x00000001
#define HID_QUIRK_NOTOUCH 0x00000002
#define HID_QUIRK_IGNORE 0x00000004
@ -495,8 +500,11 @@ void hid_output_report(struct hid_report *report, __u8 *data);
void hid_free_device(struct hid_device *device);
struct hid_device *hid_parse_report(__u8 *start, unsigned size);
/* HID quirks API */
u32 usbhid_lookup_quirk(const u16 idVendor, const u16 idProduct);
int usbhid_modify_dquirk(const u16 idVendor, const u16 idProduct, const u32 quirks);
int usbhid_quirks_init(char **quirks_param);
void usbhid_quirks_exit(void);
#ifdef CONFIG_HID_FF
int hid_ff_init(struct hid_device *hid);