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 */
17int dvb_usb_debug;
18module_param_named(debug,dvb_usb_debug, int, 0644);
19MODULE_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
21int dvb_usb_disable_rc_polling;
22module_param_named(disable_rc_polling, dvb_usb_disable_rc_polling, int, 0644);
23MODULE_PARM_DESC(disable_rc_polling, "disable remote control polling (default: 0).");
24
25static int dvb_usb_force_pid_filter_usage;
26module_param_named(force_pid_filter_usage, dvb_usb_force_pid_filter_usage, int, 0444);
27MODULE_PARM_DESC(disable_rc_polling, "force all dvb-usb-devices to use a PID filter, if any (default: 0).");
28
29static int dvb_usb_adapter_init(struct dvb_usb_device *d)
30{
31	struct dvb_usb_adapter *adap;
32	int ret,n;
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/* speed - when running at FULL speed we need a HW PID filter */
42		if (d->udev->speed == USB_SPEED_FULL && !(adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER)) {
43			err("This USB2.0 device cannot be run on a USB1.1 port. (it lacks a hardware PID filter)");
44			return -ENODEV;
45		}
46
47		if ((d->udev->speed == USB_SPEED_FULL && adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) ||
48			(adap->props.caps & DVB_USB_ADAP_NEED_PID_FILTERING)) {
49			info("will use the device's hardware PID filter (table count: %d).",adap->props.pid_filter_count);
50			adap->pid_filtering  = 1;
51			adap->max_feed_count = adap->props.pid_filter_count;
52		} else {
53			info("will pass the complete MPEG2 transport stream to the software demuxer.");
54			adap->pid_filtering  = 0;
55			adap->max_feed_count = 255;
56		}
57
58		if (!adap->pid_filtering &&
59			dvb_usb_force_pid_filter_usage &&
60			adap->props.caps & DVB_USB_ADAP_HAS_PID_FILTER) {
61			info("pid filter enabled by module option.");
62			adap->pid_filtering  = 1;
63			adap->max_feed_count = adap->props.pid_filter_count;
64		}
65
66		if (adap->props.size_of_priv > 0) {
67			adap->priv = kzalloc(adap->props.size_of_priv,GFP_KERNEL);
68			if (adap->priv == NULL) {
69				err("no memory for priv for adapter %d.",n);
70				return -ENOMEM;
71			}
72		}
73
74		if ((ret = dvb_usb_adapter_stream_init(adap)) ||
75			(ret = dvb_usb_adapter_dvb_init(adap)) ||
76			(ret = dvb_usb_adapter_frontend_init(adap))) {
77			return ret;
78		}
79
80		d->num_adapters_initialized++;
81		d->state |= DVB_USB_STATE_DVB;
82	}
83
84	/*
85	 * when reloading the driver w/o replugging the device
86	 * sometimes a timeout occures, this helps
87	 */
88	if (d->props.generic_bulk_ctrl_endpoint != 0) {
89		usb_clear_halt(d->udev,usb_sndbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
90		usb_clear_halt(d->udev,usb_rcvbulkpipe(d->udev,d->props.generic_bulk_ctrl_endpoint));
91	}
92
93	return 0;
94}
95
96static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
97{
98	int n;
99	for (n = 0; n < d->num_adapters_initialized; n++) {
100		dvb_usb_adapter_frontend_exit(&d->adapter[n]);
101		dvb_usb_adapter_dvb_exit(&d->adapter[n]);
102		dvb_usb_adapter_stream_exit(&d->adapter[n]);
103		kfree(d->adapter[n].priv);
104	}
105	d->num_adapters_initialized = 0;
106	d->state &= ~DVB_USB_STATE_DVB;
107	return 0;
108}
109
110
111/* general initialization functions */
112static int dvb_usb_exit(struct dvb_usb_device *d)
113{
114	deb_info("state before exiting everything: %x\n",d->state);
115	dvb_usb_remote_exit(d);
116	dvb_usb_adapter_exit(d);
117	dvb_usb_i2c_exit(d);
118	deb_info("state should be zero now: %x\n",d->state);
119	d->state = DVB_USB_STATE_INIT;
120	kfree(d->priv);
121	kfree(d);
122	return 0;
123}
124
125static int dvb_usb_init(struct dvb_usb_device *d)
126{
127	int ret = 0;
128
129	mutex_init(&d->usb_mutex);
130	mutex_init(&d->i2c_mutex);
131
132	d->state = DVB_USB_STATE_INIT;
133
134	if (d->props.size_of_priv > 0) {
135		d->priv = kzalloc(d->props.size_of_priv,GFP_KERNEL);
136		if (d->priv == NULL) {
137			err("no memory for priv in 'struct dvb_usb_device'");
138			return -ENOMEM;
139		}
140	}
141
142/* check the capabilities and set appropriate variables */
143	dvb_usb_device_power_ctrl(d, 1);
144
145	if ((ret = dvb_usb_i2c_init(d)) ||
146		(ret = dvb_usb_adapter_init(d))) {
147		dvb_usb_exit(d);
148		return ret;
149	}
150
151	if ((ret = dvb_usb_remote_init(d)))
152		err("could not initialize remote control.");
153
154	dvb_usb_device_power_ctrl(d, 0);
155
156	return 0;
157}
158
159/* determine the name and the state of the just found USB device */
160static struct dvb_usb_device_description * dvb_usb_find_device(struct usb_device *udev,struct dvb_usb_device_properties *props, int *cold)
161{
162	int i,j;
163	struct dvb_usb_device_description *desc = NULL;
164	*cold = -1;
165
166	for (i = 0; i < props->num_device_descs; i++) {
167
168		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
169			deb_info("check for cold %x %x\n",props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
170			if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
171				props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
172				*cold = 1;
173				desc = &props->devices[i];
174				break;
175			}
176		}
177
178		if (desc != NULL)
179			break;
180
181		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
182			deb_info("check for warm %x %x\n",props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
183			if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
184				props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
185				*cold = 0;
186				desc = &props->devices[i];
187				break;
188			}
189		}
190	}
191
192	if (desc != NULL && props->identify_state != NULL)
193		props->identify_state(udev,props,&desc,cold);
194
195	return desc;
196}
197
198int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
199{
200	if (onoff)
201		d->powered++;
202	else
203		d->powered--;
204
205	if (d->powered == 0 || (onoff && d->powered == 1)) { // when switching from 1 to 0 or from 0 to 1
206		deb_info("power control: %d\n", onoff);
207		if (d->props.power_ctrl)
208			return d->props.power_ctrl(d, onoff);
209	}
210	return 0;
211}
212
213/*
214 * USB
215 */
216int dvb_usb_device_init(struct usb_interface *intf, struct dvb_usb_device_properties
217		*props, struct module *owner,struct dvb_usb_device **du)
218{
219	struct usb_device *udev = interface_to_usbdev(intf);
220	struct dvb_usb_device *d = NULL;
221	struct dvb_usb_device_description *desc = NULL;
222
223	int ret = -ENOMEM,cold=0;
224
225	if (du != NULL)
226		*du = NULL;
227
228	if ((desc = dvb_usb_find_device(udev,props,&cold)) == NULL) {
229		deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
230		return -ENODEV;
231	}
232
233	if (cold) {
234		info("found a '%s' in cold state, will try to load a firmware",desc->name);
235		ret = dvb_usb_download_firmware(udev,props);
236		if (!props->no_reconnect || ret != 0)
237			return ret;
238	}
239
240	info("found a '%s' in warm state.",desc->name);
241		d = kzalloc(sizeof(struct dvb_usb_device),GFP_KERNEL);
242	if (d == NULL) {
243		err("no memory for 'struct dvb_usb_device'");
244		return ret;
245	}
246
247	d->udev = udev;
248	memcpy(&d->props,props,sizeof(struct dvb_usb_device_properties));
249	d->desc = desc;
250	d->owner = owner;
251
252	usb_set_intfdata(intf, d);
253
254	if (du != NULL)
255		*du = d;
256
257	ret = dvb_usb_init(d);
258
259	if (ret == 0)
260		info("%s successfully initialized and connected.",desc->name);
261	else
262		info("%s error while loading driver (%d)",desc->name,ret);
263	return ret;
264}
265EXPORT_SYMBOL(dvb_usb_device_init);
266
267void dvb_usb_device_exit(struct usb_interface *intf)
268{
269	struct dvb_usb_device *d = usb_get_intfdata(intf);
270	const char *name = "generic DVB-USB module";
271
272	usb_set_intfdata(intf,NULL);
273	if (d != NULL && d->desc != NULL) {
274		name = d->desc->name;
275		dvb_usb_exit(d);
276	}
277	info("%s successfully deinitialized and disconnected.",name);
278
279}
280EXPORT_SYMBOL(dvb_usb_device_exit);
281
282MODULE_VERSION("1.0");
283MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
284MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
285MODULE_LICENSE("GPL");
286