a1705ecb9a544ac8c99872daa9f658a0f4051815
[linux-2.6.git] / drivers / media / dvb / dvb-usb / dvb-usb-init.c
1 /*
2  * DVB USB library - provides a generic interface for a DVB USB device driver.
3  *
4  * dvb-usb-init.c
5  *
6  * Copyright (C) 2004-5 Patrick Boettcher (patrick.boettcher@desy.de)
7  *
8  *      This program is free software; you can redistribute it and/or modify it
9  *      under the terms of the GNU General Public License as published by the Free
10  *      Software Foundation, version 2.
11  *
12  * see Documentation/dvb/README.dvb-usb for more information
13  */
14 #include "dvb-usb-common.h"
15
16 /* debug */
17 int dvb_usb_debug;
18 module_param_named(debug,dvb_usb_debug, int, 0644);
19 MODULE_PARM_DESC(debug, "set debugging level (1=info,xfer=2,pll=4,ts=8,err=16,rc=32,fw=64 (or-able))." DVB_USB_DEBUG_STATUS);
20
21 int dvb_usb_disable_rc_polling;
22 module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
23 MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
24
25 /* general initialization functions */
26 static int dvb_usb_exit(struct dvb_usb_device *d)
27 {
28         deb_info("state before exiting everything: %x\n",d->state);
29         dvb_usb_remote_exit(d);
30         dvb_usb_fe_exit(d);
31         dvb_usb_i2c_exit(d);
32         dvb_usb_dvb_exit(d);
33         dvb_usb_urb_exit(d);
34         deb_info("state should be zero now: %x\n",d->state);
35         d->state = DVB_USB_STATE_INIT;
36         kfree(d->priv);
37         kfree(d);
38         return 0;
39 }
40
41 static int dvb_usb_init(struct dvb_usb_device *d)
42 {
43         int ret = 0;
44
45         mutex_init(&d->usb_mutex);
46         mutex_init(&d->i2c_mutex);
47
48         d->state = DVB_USB_STATE_INIT;
49
50 /* check the capabilities and set appropriate variables */
51
52 /* speed - when running at FULL speed we need a HW PID filter */
53         if (d->udev->speed == USB_SPEED_FULL && !(d->props.caps & DVB_USB_HAS_PID_FILTER)) {
54                 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
55                 return -ENODEV;
56         }
57
58         if ((d->udev->speed == USB_SPEED_FULL && d->props.caps & DVB_USB_HAS_PID_FILTER) ||
59                 (d->props.caps & DVB_USB_NEED_PID_FILTERING)) {
60                 info("will use the device's hardware PID filter (table count: %d).",d->props.pid_filter_count);
61                 d->pid_filtering = 1;
62                 d->max_feed_count = d->props.pid_filter_count;
63         } else {
64                 info("will pass the complete MPEG2 transport stream to the software demuxer.");
65                 d->pid_filtering = 0;
66                 d->max_feed_count = 255;
67         }
68
69         if (d->props.power_ctrl)
70                 d->props.power_ctrl(d,1);
71
72         if ((ret = dvb_usb_urb_init(d)) ||
73                 (ret = dvb_usb_dvb_init(d)) ||
74                 (ret = dvb_usb_i2c_init(d)) ||
75                 (ret = dvb_usb_fe_init(d))) {
76                 dvb_usb_exit(d);
77                 return ret;
78         }
79
80         if ((ret = dvb_usb_remote_init(d)))
81                 err("could not initialize remote control.");
82
83         if (d->props.power_ctrl)
84                 d->props.power_ctrl(d,0);
85
86         return 0;
87 }
88
89 /* determine the name and the state of the just found USB device */
90 static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_properties *props, int *cold)
91 {
92         int i,j;
93         struct dvb_usb_device_description *desc = NULL;
94         *cold = -1;
95
96         for (i = 0; i < props->num_device_descs; i++) {
97
98                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
99                         deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
100                         if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
101                                 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
102                                 *cold = 1;
103                                 desc = &props->devices[i];
104                                 break;
105                         }
106                 }
107
108                 if (desc != NULL)
109                         break;
110
111                 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
112                         deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
113                         if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
114                                 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
115                                 *cold = 0;
116                                 desc = &props->devices[i];
117                                 break;
118                         }
119                 }
120         }
121
122         if (desc != NULL && props->identify_state != NULL)
123                 props->identify_state(udev,props,&desc,cold);
124
125         return desc;
126 }
127
128 /*
129  * USB
130  */
131
132 int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_properties
133                 *props, struct module *owner,struct dvb_usb_device **du)
134 {
135         struct usb_device *udev = interface_to_usbdev(intf);
136         struct dvb_usb_device *d = NULL;
137         struct dvb_usb_device_description *desc = NULL;
138
139         int ret = -ENOMEM,cold=0;
140
141         if (du != NULL)
142                 *du = NULL;
143
144         if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
145                 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
146                 return -ENODEV;
147         }
148
149         if (cold) {
150                 info("found a '%s' in cold state, will try to load a firmware",desc->name);
151                 ret = dvb_usb_download_firmware(udev,props);
152                 if (!props->no_reconnect)
153                         return ret;
154         }
155
156         info("found a '%s' in warm state.",desc->name);
157                 d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
158         if (d == NULL) {
159                 err("no memory for 'struct dvb_usb_device'");
160                 return ret;
161         }
162
163         d->udev = udev;
164         memcpy(&d->props,props,sizeof(struct dvb_usb_properties));
165         d->desc = desc;
166         d->owner = owner;
167
168         if (d->props.size_of_priv > 0) {
169                         d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
170                 if (d->priv == NULL) {
171                         err("no memory for priv in 'struct dvb_usb_device'");
172                         kfree(d);
173                         return -ENOMEM;
174                 }
175         }
176
177         usb_set_intfdata(intf, d);
178
179         if (du != NULL)
180                 *du = d;
181
182         ret = dvb_usb_init(d);
183
184         if (ret == 0)
185                 info("%s successfully initialized and connected.",desc->name);
186         else
187                 info("%s error while loading driver (%d)",desc->name,ret);
188         return ret;
189 }
190 EXPORT_SYMBOL(dvb_usb_device_init);
191
192 void dvb_usb_device_exit(struct usb_interface *intf)
193 {
194         struct dvb_usb_device *d = usb_get_intfdata(intf);
195         const char *name = "generic DVB-USB module";
196
197         usb_set_intfdata(intf,NULL);
198         if (d != NULL && d->desc != NULL) {
199                 name = d->desc->name;
200                 dvb_usb_exit(d);
201         }
202         info("%s successfully deinitialized and disconnected.",name);
203
204 }
205 EXPORT_SYMBOL(dvb_usb_device_exit);
206
207 MODULE_VERSION("0.3");
208 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
209 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
210 MODULE_LICENSE("GPL");