usbcam_skel.c (3240B)
1 /* 2 * USBCAM abstraction library for USB webcam drivers 3 * 4 * Copyright (c) 2007 Sam Revitch <samr7 cs washington edu> 5 * 6 * This driver is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This driver is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this driver; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 /* 22 * This is a usbcam skeleton driver intended to be a starting point for 23 * minidriver development. 24 */ 25 26 #define USBCAM_DEBUG_DEFAULT 0xffff 27 28 #include <linux/kernel.h> 29 #include <linux/module.h> 30 #include <linux/init.h> 31 #include <linux/usb.h> 32 #include "usbcam.h" 33 34 35 #define USBCAM_DBG_SKEL_INIT (USBCAM_DBGBIT_MD_START + 0) 36 #define USBCAM_DBG_SKEL_FRAME (USBCAM_DBGBIT_MD_START + 1) 37 #define USBCAM_DBG_SKEL_MDINTF (USBCAM_DBGBIT_MD_START + 2) 38 #define USBCAM_DBG_SKEL_CTRL (USBCAM_DBGBIT_MD_START + 3) 39 40 41 #define skel_info(RV, FMT...) usbcam_info((RV)->cs_parent, FMT) 42 #define skel_err(RV, FMT...) usbcam_err((RV)->cs_parent, FMT) 43 #define skel_dbg(RV, SUBSYS, FMT...) usbcam_dbg((RV)->cs_parent, SUBSYS, FMT) 44 45 #define SKEL_VERSION KERNEL_VERSION(1,0,0) 46 #define SKEL_VERSION_EXTRA "" 47 48 49 /* 50 * struct skel_dev is the per-device private structure for this 51 * minidriver. We store all the details of the current state of the 52 * camera in here, other than those explicitly shared with usbcam. 53 */ 54 struct skel_dev { 55 struct usbcam_dev *cs_parent; 56 }; 57 58 #define udp_skel(UDP) ((struct skel_dev *)((UDP)->ud_minidrv_data)) 59 60 static int skel_usbcam_init(struct usbcam_dev *udp, 61 const struct usb_device_id *devid) 62 { 63 struct skel_dev *cdp = udp_skel(udp); 64 cdp->cs_parent = udp; 65 66 /* Probe/initialize the device */ 67 68 return 0; 69 } 70 71 static void skel_usbcam_disconnect(struct usbcam_dev *udp) 72 { 73 } 74 75 static int skel_usbcam_try_format(struct usbcam_dev *udp, 76 struct v4l2_pix_format *f) 77 { 78 return -EINVAL; 79 } 80 81 static int skel_usbcam_set_format(struct usbcam_dev *udp, 82 struct v4l2_pix_format *f) 83 { 84 return -EINVAL; 85 } 86 87 static int skel_usbcam_cap_start(struct usbcam_dev *udp) 88 { 89 return -EINVAL; 90 } 91 92 static void skel_usbcam_cap_stop(struct usbcam_dev *udp) 93 { 94 } 95 96 97 static struct usbcam_dev_ops skel_usbcam_dev_ops = { 98 .init = skel_usbcam_init, 99 .disconnect = skel_usbcam_disconnect, 100 .try_format = skel_usbcam_try_format, 101 .set_format = skel_usbcam_set_format, 102 .cap_start = skel_usbcam_cap_start, 103 .cap_stop = skel_usbcam_cap_stop, 104 }; 105 106 static const struct usb_device_id id_table[] = { 107 { USB_DEVICE(0xfff0, 0xfff0), .driver_info = 0 }, 108 { } 109 }; 110 111 DEFINE_USBCAM_MINIDRV_MODULE(SKEL_VERSION, 112 SKEL_VERSION_EXTRA, 113 &skel_usbcam_dev_ops, 114 sizeof(struct skel_dev), 115 id_table) 116 117 MODULE_DESCRIPTION("Driver for Skeleton Webcam"); 118 MODULE_AUTHOR("You <you yourdomain com>"); 119 MODULE_LICENSE("GPL");