94 lines
3.7 KiB
C
94 lines
3.7 KiB
C
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/* usb-common.h - prototypes for the common useful USB functions
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Copyright (C) 2008 Arnaud Quette <arnaud.quette@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef NUT_USB_COMMON_H
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#define NUT_USB_COMMON_H
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#include "nut_stdint.h" /* for uint16_t */
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#include <regex.h>
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#include <usb.h>
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/*!
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* USBDevice_t: Describe a USB device. This structure contains exactly
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* the 5 pieces of information by which a USB device identifies
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* itself, so it serves as a kind of "fingerprint" of the device. This
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* information must be matched exactly when reopening a device, and
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* therefore must not be "improved" or updated by a client
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* program. Vendor, Product, and Serial can be NULL if the
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* corresponding string did not exist or could not be retrieved.
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*/
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typedef struct USBDevice_s {
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uint16_t VendorID; /*!< Device's Vendor ID */
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uint16_t ProductID; /*!< Device's Product ID */
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char *Vendor; /*!< Device's Vendor Name */
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char *Product; /*!< Device's Product Name */
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char *Serial; /* Product serial number */
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char *Bus; /* Bus name, e.g. "003" */
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} USBDevice_t;
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/*!
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* USBDeviceMatcher_t: A "USB matcher" is a callback function that
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* inputs a USBDevice_t structure, and returns 1 for a match and 0
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* for a non-match. Thus, a matcher provides a criterion for
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* selecting a USB device. The callback function further is
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* expected to return -1 on error with errno set, and -2 on other
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* errors. Matchers can be connected in a linked list via the
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* "next" field.
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*/
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typedef struct USBDeviceMatcher_s {
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int (*match_function)(USBDevice_t *device, void *privdata);
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void *privdata;
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struct USBDeviceMatcher_s *next;
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} USBDeviceMatcher_t;
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/* constructors and destructors for specific types of matchers. An
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exact matcher matches a specific usb_device_t structure (except for
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the Bus component, which is ignored). A regex matcher matches
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devices based on a set of regular expressions. The USBNew* functions
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return a matcher on success, or -1 on error with errno set. Note
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that the "USBFree*" functions only free the current matcher, not
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any others that are linked via "next" fields. */
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int USBNewExactMatcher(USBDeviceMatcher_t **matcher, USBDevice_t *hd);
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int USBNewRegexMatcher(USBDeviceMatcher_t **matcher, char **regex, int cflags);
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void USBFreeExactMatcher(USBDeviceMatcher_t *matcher);
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void USBFreeRegexMatcher(USBDeviceMatcher_t *matcher);
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/* dummy USB function and macro, inspired from the Linux kernel
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* this allows USB information extraction */
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#define USB_DEVICE(vendorID, productID) vendorID, productID
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typedef struct {
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int vendorID;
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int productID;
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void *(*fun)(void); /* handler for specific processing */
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} usb_device_id_t;
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#define NOT_SUPPORTED 0
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#define POSSIBLY_SUPPORTED 1
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#define SUPPORTED 2
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/* Function used to match a VendorID/ProductID pair against a list of
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* supported devices. Return values:
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* NOT_SUPPORTED (0), POSSIBLY_SUPPORTED (1) or SUPPORTED (2) */
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int is_usb_device_supported(usb_device_id_t *usb_device_id_list,
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int dev_VendorID, int dev_ProductID);
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#endif /* NUT_USB_COMMON_H */
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