Linux kernel & device driver programming

Cross-Referenced Linux and Device Driver Code

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Version: [ 2.6.11.8 ] [ 2.6.25 ] [ 2.6.25.8 ] [ 2.6.31.13 ] Architecture: [ i386 ]
  1 /*
  2  *
  3  *
  4  *  Copyright (C) 2005 Mike Isely <isely@pobox.com>
  5  *  Copyright (C) 2004 Aurelien Alleaume <slts@free.fr>
  6  *
  7  *  This program is free software; you can redistribute it and/or modify
  8  *  it under the terms of the GNU General Public License as published by
  9  *  the Free Software Foundation; either version 2 of the License
 10  *
 11  *  This program 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 program; if not, write to the Free Software
 18  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 19  *
 20  */
 21 
 22 #include <linux/kernel.h>
 23 #include <linux/errno.h>
 24 #include <linux/slab.h>
 25 #include <linux/module.h>
 26 #include <linux/usb.h>
 27 #include <linux/videodev2.h>
 28 
 29 #include "pvrusb2-hdw.h"
 30 #include "pvrusb2-devattr.h"
 31 #include "pvrusb2-context.h"
 32 #include "pvrusb2-debug.h"
 33 #include "pvrusb2-v4l2.h"
 34 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
 35 #include "pvrusb2-sysfs.h"
 36 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
 37 
 38 #define DRIVER_AUTHOR "Mike Isely <isely@pobox.com>"
 39 #define DRIVER_DESC "Hauppauge WinTV-PVR-USB2 MPEG2 Encoder/Tuner"
 40 #define DRIVER_VERSION "V4L in-tree version"
 41 
 42 #define DEFAULT_DEBUG_MASK (PVR2_TRACE_ERROR_LEGS| \
 43                             PVR2_TRACE_INFO| \
 44                             PVR2_TRACE_STD| \
 45                             PVR2_TRACE_TOLERANCE| \
 46                             PVR2_TRACE_TRAP| \
 47                             0)
 48 
 49 int pvrusb2_debug = DEFAULT_DEBUG_MASK;
 50 
 51 module_param_named(debug,pvrusb2_debug,int,S_IRUGO|S_IWUSR);
 52 MODULE_PARM_DESC(debug, "Debug trace mask");
 53 
 54 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
 55 static struct pvr2_sysfs_class *class_ptr = NULL;
 56 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
 57 
 58 static void pvr_setup_attach(struct pvr2_context *pvr)
 59 {
 60         /* Create association with v4l layer */
 61         pvr2_v4l2_create(pvr);
 62 #ifdef CONFIG_VIDEO_PVRUSB2_DVB
 63         /* Create association with dvb layer */
 64         pvr2_dvb_create(pvr);
 65 #endif
 66 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
 67         pvr2_sysfs_create(pvr,class_ptr);
 68 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
 69 }
 70 
 71 static int pvr_probe(struct usb_interface *intf,
 72                      const struct usb_device_id *devid)
 73 {
 74         struct pvr2_context *pvr;
 75 
 76         /* Create underlying hardware interface */
 77         pvr = pvr2_context_create(intf,devid,pvr_setup_attach);
 78         if (!pvr) {
 79                 pvr2_trace(PVR2_TRACE_ERROR_LEGS,
 80                            "Failed to create hdw handler");
 81                 return -ENOMEM;
 82         }
 83 
 84         pvr2_trace(PVR2_TRACE_INIT,"pvr_probe(pvr=%p)",pvr);
 85 
 86         usb_set_intfdata(intf, pvr);
 87 
 88         return 0;
 89 }
 90 
 91 /*
 92  * pvr_disconnect()
 93  *
 94  */
 95 static void pvr_disconnect(struct usb_interface *intf)
 96 {
 97         struct pvr2_context *pvr = usb_get_intfdata(intf);
 98 
 99         pvr2_trace(PVR2_TRACE_INIT,"pvr_disconnect(pvr=%p) BEGIN",pvr);
100 
101         usb_set_intfdata (intf, NULL);
102         pvr2_context_disconnect(pvr);
103 
104         pvr2_trace(PVR2_TRACE_INIT,"pvr_disconnect(pvr=%p) DONE",pvr);
105 
106 }
107 
108 static struct usb_driver pvr_driver = {
109         .name =         "pvrusb2",
110         .id_table =     pvr2_device_table,
111         .probe =        pvr_probe,
112         .disconnect =   pvr_disconnect
113 };
114 
115 /*
116  * pvr_init() / pvr_exit()
117  *
118  * This code is run to initialize/exit the driver.
119  *
120  */
121 static int __init pvr_init(void)
122 {
123         int ret;
124 
125         pvr2_trace(PVR2_TRACE_INIT,"pvr_init");
126 
127         ret = pvr2_context_global_init();
128         if (ret != 0) {
129                 pvr2_trace(PVR2_TRACE_INIT,"pvr_init failure code=%d",ret);
130                 return ret;
131         }
132 
133 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
134         class_ptr = pvr2_sysfs_class_create();
135 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
136 
137         ret = usb_register(&pvr_driver);
138 
139         if (ret == 0)
140                 printk(KERN_INFO "pvrusb2: " DRIVER_VERSION ":"
141                        DRIVER_DESC "\n");
142         if (pvrusb2_debug)
143                 printk(KERN_INFO "pvrusb2: Debug mask is %d (0x%x)\n",
144                        pvrusb2_debug,pvrusb2_debug);
145 
146         pvr2_trace(PVR2_TRACE_INIT,"pvr_init complete");
147 
148         return ret;
149 }
150 
151 static void __exit pvr_exit(void)
152 {
153         pvr2_trace(PVR2_TRACE_INIT,"pvr_exit");
154 
155         usb_deregister(&pvr_driver);
156 
157 #ifdef CONFIG_VIDEO_PVRUSB2_SYSFS
158         pvr2_sysfs_class_destroy(class_ptr);
159 #endif /* CONFIG_VIDEO_PVRUSB2_SYSFS */
160 
161         pvr2_context_global_done();
162 
163         pvr2_trace(PVR2_TRACE_INIT,"pvr_exit complete");
164 }
165 
166 module_init(pvr_init);
167 module_exit(pvr_exit);
168 
169 MODULE_AUTHOR(DRIVER_AUTHOR);
170 MODULE_DESCRIPTION(DRIVER_DESC);
171 MODULE_LICENSE("GPL");
172 
173 
174 /*
175   Stuff for Emacs to see, in order to encourage consistent editing style:
176   *** Local Variables: ***
177   *** mode: c ***
178   *** fill-column: 70 ***
179   *** tab-width: 8 ***
180   *** c-basic-offset: 8 ***
181   *** End: ***
182   */
183 
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