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) 2004-6 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,mem=128,uxfer=256 (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 static int dvb_usb_force_pid_filter_usage;
26 module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
27 MODULE_PARM_DESC(force_pid_filter_usage, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
28
dvb_usb_adapter_init(struct dvb_usb_device * d,short * adapter_nrs)29 static int dvb_usb_adapter_init(struct dvb_usb_device *d, short *adapter_nrs)
30 {
31 struct dvb_usb_adapter *adap;
32 int ret, n, o;
33
34 for (n = 0; n < d->props.num_adapters; n++) {
35 adap = &d->adapter[n];
36 adap->dev = d;
37 adap->id = n;
38
39 memcpy(&adap->props, &d->props.adapter[n], sizeof(struct dvb_usb_adapter_properties));
40
41 for (o = 0; o < adap->props.num_frontends; o++) {
42 struct dvb_usb_adapter_fe_properties *props = &adap->props.fe[o];
43 /* speed - when running at FULL speed we need a HW PID filter */
44 if (d->udev->speed == USB_SPEED_FULL && !(props->caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
45 err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
46 return -ENODEV;
47 }
48
49 if ((d->udev->speed == USB_SPEED_FULL && props->caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
50 (props->caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
51 info("will use the device's hardware PID filter (table count: %d).", props->pid_filter_count);
52 adap->fe_adap[o].pid_filtering = 1;
53 adap->fe_adap[o].max_feed_count = props->pid_filter_count;
54 } else {
55 info("will pass the complete MPEG2 transport stream to the software demuxer.");
56 adap->fe_adap[o].pid_filtering = 0;
57 adap->fe_adap[o].max_feed_count = 255;
58 }
59
60 if (!adap->fe_adap[o].pid_filtering &&
61 dvb_usb_force_pid_filter_usage &&
62 props->caps & DVB_USB_ADAP_HAS_PID_FILTER) {
63 info("pid filter enabled by module option.");
64 adap->fe_adap[o].pid_filtering = 1;
65 adap->fe_adap[o].max_feed_count = props->pid_filter_count;
66 }
67
68 if (props->size_of_priv > 0) {
69 adap->fe_adap[o].priv = kzalloc(props->size_of_priv, GFP_KERNEL);
70 if (adap->fe_adap[o].priv == NULL) {
71 err("no memory for priv for adapter %d fe %d.", n, o);
72 return -ENOMEM;
73 }
74 }
75 }
76
77 if (adap->props.size_of_priv > 0) {
78 adap->priv = kzalloc(adap->props.size_of_priv, GFP_KERNEL);
79 if (adap->priv == NULL) {
80 err("no memory for priv for adapter %d.", n);
81 return -ENOMEM;
82 }
83 }
84
85 ret = dvb_usb_adapter_stream_init(adap);
86 if (ret)
87 return ret;
88
89 ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs);
90 if (ret)
91 goto dvb_init_err;
92
93 ret = dvb_usb_adapter_frontend_init(adap);
94 if (ret)
95 goto frontend_init_err;
96
97 /* use exclusive FE lock if there is multiple shared FEs */
98 if (adap->fe_adap[1].fe)
99 adap->dvb_adap.mfe_shared = 1;
100
101 d->num_adapters_initialized++;
102 d->state |= DVB_USB_STATE_DVB;
103 }
104
105 /*
106 * when reloading the driver w/o replugging the device
107 * sometimes a timeout occures, this helps
108 */
109 if (d->props.generic_bulk_ctrl_endpoint != 0) {
110 usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
111 usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
112 }
113
114 return 0;
115
116 frontend_init_err:
117 dvb_usb_adapter_dvb_exit(adap);
118 dvb_init_err:
119 dvb_usb_adapter_stream_exit(adap);
120 return ret;
121 }
122
dvb_usb_adapter_exit(struct dvb_usb_device * d)123 static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
124 {
125 int n;
126
127 for (n = 0; n < d->num_adapters_initialized; n++) {
128 dvb_usb_adapter_frontend_exit(&d->adapter[n]);
129 dvb_usb_adapter_dvb_exit(&d->adapter[n]);
130 dvb_usb_adapter_stream_exit(&d->adapter[n]);
131 kfree(d->adapter[n].priv);
132 }
133 d->num_adapters_initialized = 0;
134 d->state &= ~DVB_USB_STATE_DVB;
135 return 0;
136 }
137
138
139 /* general initialization functions */
dvb_usb_exit(struct dvb_usb_device * d)140 static int dvb_usb_exit(struct dvb_usb_device *d)
141 {
142 deb_info("state before exiting everything: %x\n", d->state);
143 dvb_usb_remote_exit(d);
144 dvb_usb_adapter_exit(d);
145 dvb_usb_i2c_exit(d);
146 deb_info("state should be zero now: %x\n", d->state);
147 d->state = DVB_USB_STATE_INIT;
148 kfree(d->priv);
149 kfree(d);
150 return 0;
151 }
152
dvb_usb_init(struct dvb_usb_device * d,short * adapter_nums)153 static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums)
154 {
155 int ret = 0;
156
157 mutex_init(&d->usb_mutex);
158 mutex_init(&d->i2c_mutex);
159
160 d->state = DVB_USB_STATE_INIT;
161
162 if (d->props.size_of_priv > 0) {
163 d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
164 if (d->priv == NULL) {
165 err("no memory for priv in 'struct dvb_usb_device'");
166 return -ENOMEM;
167 }
168 }
169
170 /* check the capabilities and set appropriate variables */
171 dvb_usb_device_power_ctrl(d, 1);
172
173 if ((ret = dvb_usb_i2c_init(d)) ||
174 (ret = dvb_usb_adapter_init(d, adapter_nums))) {
175 dvb_usb_exit(d);
176 return ret;
177 }
178
179 if ((ret = dvb_usb_remote_init(d)))
180 err("could not initialize remote control.");
181
182 dvb_usb_device_power_ctrl(d, 0);
183
184 return 0;
185 }
186
187 /* determine the name and the state of the just found USB device */
dvb_usb_find_device(struct usb_device * udev,struct dvb_usb_device_properties * props,int * cold)188 static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold)
189 {
190 int i, j;
191 struct dvb_usb_device_description *desc = NULL;
192
193 *cold = -1;
194
195 for (i = 0; i < props->num_device_descs; i++) {
196
197 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
198 deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
199 if (props->devices[i].cold_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
200 props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
201 *cold = 1;
202 desc = &props->devices[i];
203 break;
204 }
205 }
206
207 if (desc != NULL)
208 break;
209
210 for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
211 deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
212 if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
213 props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
214 *cold = 0;
215 desc = &props->devices[i];
216 break;
217 }
218 }
219 }
220
221 if (desc != NULL && props->identify_state != NULL)
222 props->identify_state(udev, props, &desc, cold);
223
224 return desc;
225 }
226
dvb_usb_device_power_ctrl(struct dvb_usb_device * d,int onoff)227 int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
228 {
229 if (onoff)
230 d->powered++;
231 else
232 d->powered--;
233
234 if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */
235 deb_info("power control: %d\n", onoff);
236 if (d->props.power_ctrl)
237 return d->props.power_ctrl(d, onoff);
238 }
239 return 0;
240 }
241
242 /*
243 * USB
244 */
dvb_usb_device_init(struct usb_interface * intf,struct dvb_usb_device_properties * props,struct module * owner,struct dvb_usb_device ** du,short * adapter_nums)245 int dvb_usb_device_init(struct usb_interface *intf,
246 struct dvb_usb_device_properties *props,
247 struct module *owner, struct dvb_usb_device **du,
248 short *adapter_nums)
249 {
250 struct usb_device *udev = interface_to_usbdev(intf);
251 struct dvb_usb_device *d = NULL;
252 struct dvb_usb_device_description *desc = NULL;
253
254 int ret = -ENOMEM, cold = 0;
255
256 if (du != NULL)
257 *du = NULL;
258
259 if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) {
260 deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
261 return -ENODEV;
262 }
263
264 if (cold) {
265 info("found a '%s' in cold state, will try to load a firmware", desc->name);
266 ret = dvb_usb_download_firmware(udev, props);
267 if (!props->no_reconnect || ret != 0)
268 return ret;
269 }
270
271 info("found a '%s' in warm state.", desc->name);
272 d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
273 if (d == NULL) {
274 err("no memory for 'struct dvb_usb_device'");
275 return -ENOMEM;
276 }
277
278 d->udev = udev;
279 memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
280 d->desc = desc;
281 d->owner = owner;
282
283 usb_set_intfdata(intf, d);
284
285 if (du != NULL)
286 *du = d;
287
288 ret = dvb_usb_init(d, adapter_nums);
289
290 if (ret == 0)
291 info("%s successfully initialized and connected.", desc->name);
292 else
293 info("%s error while loading driver (%d)", desc->name, ret);
294 return ret;
295 }
296 EXPORT_SYMBOL(dvb_usb_device_init);
297
dvb_usb_device_exit(struct usb_interface * intf)298 void dvb_usb_device_exit(struct usb_interface *intf)
299 {
300 struct dvb_usb_device *d = usb_get_intfdata(intf);
301 const char *default_name = "generic DVB-USB module";
302 char name[40];
303
304 usb_set_intfdata(intf, NULL);
305 if (d != NULL && d->desc != NULL) {
306 strscpy(name, d->desc->name, sizeof(name));
307 dvb_usb_exit(d);
308 } else {
309 strscpy(name, default_name, sizeof(name));
310 }
311 info("%s successfully deinitialized and disconnected.", name);
312
313 }
314 EXPORT_SYMBOL(dvb_usb_device_exit);
315
316 MODULE_VERSION("1.0");
317 MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
318 MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
319 MODULE_LICENSE("GPL");
320