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(force_pid_filter_usage, "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, 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		if ((ret = dvb_usb_adapter_stream_init(adap)) ||
86			(ret = dvb_usb_adapter_dvb_init(adap, adapter_nrs)) ||
87			(ret = dvb_usb_adapter_frontend_init(adap))) {
88			return ret;
89		}
90
91		/* use exclusive FE lock if there is multiple shared FEs */
92		if (adap->fe_adap[1].fe)
93			adap->dvb_adap.mfe_shared = 1;
94
95		d->num_adapters_initialized++;
96		d->state |= DVB_USB_STATE_DVB;
97	}
98
99	/*
100	 * when reloading the driver w/o replugging the device
101	 * sometimes a timeout occures, this helps
102	 */
103	if (d->props.generic_bulk_ctrl_endpoint != 0) {
104		usb_clear_halt(d->udev, usb_sndbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
105		usb_clear_halt(d->udev, usb_rcvbulkpipe(d->udev, d->props.generic_bulk_ctrl_endpoint));
106	}
107
108	return 0;
109}
110
111static int dvb_usb_adapter_exit(struct dvb_usb_device *d)
112{
113	int n;
114
115	for (n = 0; n < d->num_adapters_initialized; n++) {
116		dvb_usb_adapter_frontend_exit(&d->adapter[n]);
117		dvb_usb_adapter_dvb_exit(&d->adapter[n]);
118		dvb_usb_adapter_stream_exit(&d->adapter[n]);
119		kfree(d->adapter[n].priv);
120	}
121	d->num_adapters_initialized = 0;
122	d->state &= ~DVB_USB_STATE_DVB;
123	return 0;
124}
125
126
127/* general initialization functions */
128static int dvb_usb_exit(struct dvb_usb_device *d)
129{
130	deb_info("state before exiting everything: %x\n", d->state);
131	dvb_usb_remote_exit(d);
132	dvb_usb_adapter_exit(d);
133	dvb_usb_i2c_exit(d);
134	deb_info("state should be zero now: %x\n", d->state);
135	d->state = DVB_USB_STATE_INIT;
136	kfree(d->priv);
137	kfree(d);
138	return 0;
139}
140
141static int dvb_usb_init(struct dvb_usb_device *d, short *adapter_nums)
142{
143	int ret = 0;
144
145	mutex_init(&d->usb_mutex);
146	mutex_init(&d->i2c_mutex);
147
148	d->state = DVB_USB_STATE_INIT;
149
150	if (d->props.size_of_priv > 0) {
151		d->priv = kzalloc(d->props.size_of_priv, GFP_KERNEL);
152		if (d->priv == NULL) {
153			err("no memory for priv in 'struct dvb_usb_device'");
154			return -ENOMEM;
155		}
156	}
157
158	/* check the capabilities and set appropriate variables */
159	dvb_usb_device_power_ctrl(d, 1);
160
161	if ((ret = dvb_usb_i2c_init(d)) ||
162		(ret = dvb_usb_adapter_init(d, adapter_nums))) {
163		dvb_usb_exit(d);
164		return ret;
165	}
166
167	if ((ret = dvb_usb_remote_init(d)))
168		err("could not initialize remote control.");
169
170	dvb_usb_device_power_ctrl(d, 0);
171
172	return 0;
173}
174
175/* determine the name and the state of the just found USB device */
176static struct dvb_usb_device_description *dvb_usb_find_device(struct usb_device *udev, struct dvb_usb_device_properties *props, int *cold)
177{
178	int i, j;
179	struct dvb_usb_device_description *desc = NULL;
180
181	*cold = -1;
182
183	for (i = 0; i < props->num_device_descs; i++) {
184
185		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].cold_ids[j] != NULL; j++) {
186			deb_info("check for cold %x %x\n", props->devices[i].cold_ids[j]->idVendor, props->devices[i].cold_ids[j]->idProduct);
187			if (props->devices[i].cold_ids[j]->idVendor  == le16_to_cpu(udev->descriptor.idVendor) &&
188				props->devices[i].cold_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
189				*cold = 1;
190				desc = &props->devices[i];
191				break;
192			}
193		}
194
195		if (desc != NULL)
196			break;
197
198		for (j = 0; j < DVB_USB_ID_MAX_NUM && props->devices[i].warm_ids[j] != NULL; j++) {
199			deb_info("check for warm %x %x\n", props->devices[i].warm_ids[j]->idVendor, props->devices[i].warm_ids[j]->idProduct);
200			if (props->devices[i].warm_ids[j]->idVendor == le16_to_cpu(udev->descriptor.idVendor) &&
201				props->devices[i].warm_ids[j]->idProduct == le16_to_cpu(udev->descriptor.idProduct)) {
202				*cold = 0;
203				desc = &props->devices[i];
204				break;
205			}
206		}
207	}
208
209	if (desc != NULL && props->identify_state != NULL)
210		props->identify_state(udev, props, &desc, cold);
211
212	return desc;
213}
214
215int dvb_usb_device_power_ctrl(struct dvb_usb_device *d, int onoff)
216{
217	if (onoff)
218		d->powered++;
219	else
220		d->powered--;
221
222	if (d->powered == 0 || (onoff && d->powered == 1)) { /* when switching from 1 to 0 or from 0 to 1 */
223		deb_info("power control: %d\n", onoff);
224		if (d->props.power_ctrl)
225			return d->props.power_ctrl(d, onoff);
226	}
227	return 0;
228}
229
230/*
231 * USB
232 */
233int dvb_usb_device_init(struct usb_interface *intf,
234			struct dvb_usb_device_properties *props,
235			struct module *owner, struct dvb_usb_device **du,
236			short *adapter_nums)
237{
238	struct usb_device *udev = interface_to_usbdev(intf);
239	struct dvb_usb_device *d = NULL;
240	struct dvb_usb_device_description *desc = NULL;
241
242	int ret = -ENOMEM, cold = 0;
243
244	if (du != NULL)
245		*du = NULL;
246
247	if ((desc = dvb_usb_find_device(udev, props, &cold)) == NULL) {
248		deb_err("something went very wrong, device was not found in current device list - let's see what comes next.\n");
249		return -ENODEV;
250	}
251
252	if (cold) {
253		info("found a '%s' in cold state, will try to load a firmware", desc->name);
254		ret = dvb_usb_download_firmware(udev, props);
255		if (!props->no_reconnect || ret != 0)
256			return ret;
257	}
258
259	info("found a '%s' in warm state.", desc->name);
260	d = kzalloc(sizeof(struct dvb_usb_device), GFP_KERNEL);
261	if (d == NULL) {
262		err("no memory for 'struct dvb_usb_device'");
263		return -ENOMEM;
264	}
265
266	d->udev = udev;
267	memcpy(&d->props, props, sizeof(struct dvb_usb_device_properties));
268	d->desc = desc;
269	d->owner = owner;
270
271	usb_set_intfdata(intf, d);
272
273	if (du != NULL)
274		*du = d;
275
276	ret = dvb_usb_init(d, adapter_nums);
277
278	if (ret == 0)
279		info("%s successfully initialized and connected.", desc->name);
280	else
281		info("%s error while loading driver (%d)", desc->name, ret);
282	return ret;
283}
284EXPORT_SYMBOL(dvb_usb_device_init);
285
286void dvb_usb_device_exit(struct usb_interface *intf)
287{
288	struct dvb_usb_device *d = usb_get_intfdata(intf);
289	const char *name = "generic DVB-USB module";
290
291	usb_set_intfdata(intf, NULL);
292	if (d != NULL && d->desc != NULL) {
293		name = d->desc->name;
294		dvb_usb_exit(d);
295	}
296	info("%s successfully deinitialized and disconnected.", name);
297
298}
299EXPORT_SYMBOL(dvb_usb_device_exit);
300
301MODULE_VERSION("1.0");
302MODULE_AUTHOR("Patrick Boettcher <patrick.boettcher@desy.de>");
303MODULE_DESCRIPTION("A library module containing commonly used USB and DVB function USB DVB devices");
304MODULE_LICENSE("GPL");
305